| /* $Id$ */ |
| /* |
| * Copyright (C) 2003-2007 Benny Prijono <benny@prijono.org> |
| * |
| * 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 |
| */ |
| #include <pjlib.h> |
| #include <pjlib-util.h> |
| #include <pjmedia.h> |
| #include <pjmedia-codec.h> |
| |
| static const char *USAGE = |
| "pcaputil [options] INPUT OUTPUT\n" |
| "\n" |
| " Convert captured RTP packets in PCAP file to WAV or stream it\n" |
| " to remote destination.\n" |
| "\n" |
| "INPUT is the PCAP file name/path\n" |
| "\n" |
| "Options to filter packets from PCAP file:\n" |
| "(you can always select the relevant packets from Wireshark of course!)\n" |
| " --src-ip=IP Only include packets from this source address\n" |
| " --dst-ip=IP Only include packets destined to this address\n" |
| " --src-port=port Only include packets from this source port number\n" |
| " --dst-port=port Only include packets destined to this port number\n" |
| "\n" |
| "Options for saving to WAV file:\n" |
| "" |
| " OUTPUT is WAV file: Set output to WAV file. The program will decode the\n" |
| " RTP contents to the specified WAV file using codec\n" |
| " that is available in PJMEDIA, and optionally decrypt\n" |
| " the content using the SRTP crypto and keys below.\n" |
| " --srtp-crypto=TAG, -c Set crypto to be used to decrypt SRTP packets. Valid\n" |
| " tags are: \n" |
| " AES_CM_128_HMAC_SHA1_80 \n" |
| " AES_CM_128_HMAC_SHA1_32\n" |
| " --srtp-key=KEY, -k Set the base64 key to decrypt SRTP packets.\n" |
| "\n" |
| " Example:\n" |
| " pcaputil file.pcap output.wav\n" |
| " pcaputil -c AES_CM_128_HMAC_SHA1_80 \\\n" |
| " -k VLDONbsbGl2Puqy+0PV7w/uGfpSPKFevDpxGsxN3 \\\n" |
| " file.pcap output.wav\n" |
| "\n" |
| "Remote streaming is not supported yet." |
| ; |
| |
| static struct app |
| { |
| pj_caching_pool cp; |
| pj_pool_t *pool; |
| pjmedia_endpt *mept; |
| pj_pcap_file *pcap; |
| pjmedia_port *wav; |
| pjmedia_codec *codec; |
| unsigned pt; |
| pjmedia_transport *srtp; |
| pjmedia_rtp_session rtp_sess; |
| pj_bool_t rtp_sess_init; |
| } app; |
| |
| static void err_exit(const char *title, pj_status_t status) |
| { |
| if (status != PJ_SUCCESS) { |
| char errmsg[PJ_ERR_MSG_SIZE]; |
| pj_strerror(status, errmsg, sizeof(errmsg)); |
| printf("Error: %s: %s\n", title, errmsg); |
| } else { |
| printf("Error: %s\n", title); |
| } |
| |
| if (app.srtp) pjmedia_transport_close(app.srtp); |
| if (app.wav) { |
| pj_ssize_t pos = pjmedia_wav_writer_port_get_pos(app.wav); |
| if (pos >= 0) { |
| unsigned msec; |
| msec = pos / 2 * 1000 / app.wav->info.clock_rate; |
| printf("Written: %dm:%02ds.%03d\n", |
| msec / 1000 / 60, |
| (msec / 1000) % 60, |
| msec % 1000); |
| } |
| pjmedia_port_destroy(app.wav); |
| } |
| if (app.pcap) pj_pcap_close(app.pcap); |
| if (app.codec) { |
| pjmedia_codec_mgr *cmgr; |
| app.codec->op->close(app.codec); |
| cmgr = pjmedia_endpt_get_codec_mgr(app.mept); |
| pjmedia_codec_mgr_dealloc_codec(cmgr, app.codec); |
| } |
| if (app.mept) pjmedia_endpt_destroy(app.mept); |
| if (app.pool) pj_pool_release(app.pool); |
| pj_caching_pool_destroy(&app.cp); |
| pj_shutdown(); |
| |
| exit(1); |
| } |
| |
| #define T(op) do { \ |
| status = op; \ |
| if (status != PJ_SUCCESS) \ |
| err_exit(#op, status); \ |
| } while (0) |
| |
| |
| static void read_rtp(pj_uint8_t *buf, pj_size_t bufsize, |
| pjmedia_rtp_hdr **rtp, |
| pj_uint8_t **payload, |
| unsigned *payload_size) |
| { |
| pj_status_t status; |
| |
| /* Init RTP session */ |
| if (!app.rtp_sess_init) { |
| T(pjmedia_rtp_session_init(&app.rtp_sess, 0, 0)); |
| app.rtp_sess_init = PJ_TRUE; |
| } |
| |
| /* Loop reading until we have a good RTP packet */ |
| for (;;) { |
| pj_size_t sz = bufsize; |
| const pjmedia_rtp_hdr *r; |
| const void *p; |
| pjmedia_rtp_status seq_st; |
| |
| status = pj_pcap_read_udp(app.pcap, NULL, buf, &sz); |
| if (status != PJ_SUCCESS) |
| err_exit("Error reading PCAP file", status); |
| |
| /* Decode RTP packet to make sure that this is an RTP packet. |
| * We will decode it again to get the payload after we do |
| * SRTP decoding |
| */ |
| status = pjmedia_rtp_decode_rtp(&app.rtp_sess, buf, sz, &r, |
| &p, payload_size); |
| if (status != PJ_SUCCESS) { |
| char errmsg[PJ_ERR_MSG_SIZE]; |
| pj_strerror(status, errmsg, sizeof(errmsg)); |
| printf("Not RTP packet, skipping packet: %s\n", errmsg); |
| continue; |
| } |
| |
| /* Decrypt SRTP */ |
| #if PJMEDIA_HAS_SRTP |
| if (app.srtp) { |
| int len = sz; |
| status = pjmedia_transport_srtp_decrypt_pkt(app.srtp, PJ_TRUE, |
| buf, &len); |
| if (status != PJ_SUCCESS) { |
| char errmsg[PJ_ERR_MSG_SIZE]; |
| pj_strerror(status, errmsg, sizeof(errmsg)); |
| printf("SRTP packet decryption failed, skipping packet: %s\n", |
| errmsg); |
| continue; |
| } |
| sz = len; |
| |
| /* Decode RTP packet again */ |
| status = pjmedia_rtp_decode_rtp(&app.rtp_sess, buf, sz, &r, |
| &p, payload_size); |
| if (status != PJ_SUCCESS) { |
| char errmsg[PJ_ERR_MSG_SIZE]; |
| pj_strerror(status, errmsg, sizeof(errmsg)); |
| printf("Not RTP packet, skipping packet: %s\n", errmsg); |
| continue; |
| } |
| } |
| #endif |
| |
| /* Update RTP session */ |
| pjmedia_rtp_session_update(&app.rtp_sess, r, &seq_st); |
| |
| /* Skip out-of-order packet */ |
| if (seq_st.diff == 0) { |
| printf("Skipping out of order packet\n"); |
| continue; |
| } |
| |
| /* Skip if payload type is different */ |
| if (r->pt != app.pt) { |
| printf("Skipping RTP packet with bad payload type\n"); |
| continue; |
| } |
| |
| /* Skip bad packet */ |
| if (seq_st.status.flag.bad) { |
| printf("Skipping bad RTP\n"); |
| continue; |
| } |
| |
| |
| *rtp = (pjmedia_rtp_hdr*)r; |
| *payload = (pj_uint8_t*)p; |
| |
| /* We have good packet */ |
| break; |
| } |
| } |
| |
| static void pcap2wav(const char *wav_filename, const pj_str_t *srtp_crypto, |
| const pj_str_t *srtp_key) |
| { |
| struct pkt |
| { |
| pj_uint8_t buffer[320]; |
| pjmedia_rtp_hdr *rtp; |
| pj_uint8_t *payload; |
| unsigned payload_len; |
| } pkt0; |
| pjmedia_codec_mgr *cmgr; |
| const pjmedia_codec_info *ci; |
| pjmedia_codec_param param; |
| unsigned samples_per_frame; |
| pj_status_t status; |
| |
| /* Initialize all codecs */ |
| #if PJMEDIA_HAS_SPEEX_CODEC |
| T( pjmedia_codec_speex_init(app.mept, 0, 10, 10) ); |
| #endif /* PJMEDIA_HAS_SPEEX_CODEC */ |
| |
| #if PJMEDIA_HAS_ILBC_CODEC |
| T( pjmedia_codec_ilbc_init(app.mept, 30) ); |
| #endif /* PJMEDIA_HAS_ILBC_CODEC */ |
| |
| #if PJMEDIA_HAS_GSM_CODEC |
| T( pjmedia_codec_gsm_init(app.mept) ); |
| #endif /* PJMEDIA_HAS_GSM_CODEC */ |
| |
| #if PJMEDIA_HAS_G711_CODEC |
| T( pjmedia_codec_g711_init(app.mept) ); |
| #endif /* PJMEDIA_HAS_G711_CODEC */ |
| |
| #if PJMEDIA_HAS_L16_CODEC |
| T( pjmedia_codec_l16_init(app.mept, 0) ); |
| #endif /* PJMEDIA_HAS_L16_CODEC */ |
| |
| /* Create SRTP transport is needed */ |
| #if PJMEDIA_HAS_SRTP |
| if (srtp_crypto->slen) { |
| pjmedia_srtp_crypto crypto; |
| |
| pj_bzero(&crypto, sizeof(crypto)); |
| crypto.key = *srtp_key; |
| crypto.name = *srtp_crypto; |
| T( pjmedia_transport_srtp_create(app.mept, NULL, NULL, &app.srtp) ); |
| T( pjmedia_transport_srtp_start(app.srtp, &crypto, &crypto) ); |
| } |
| #else |
| PJ_UNUSED_ARG(srtp_crypto); |
| PJ_UNUSED_ARG(srtp_key); |
| #endif |
| |
| /* Read first packet */ |
| read_rtp(pkt0.buffer, sizeof(pkt0.buffer), &pkt0.rtp, |
| &pkt0.payload, &pkt0.payload_len); |
| |
| cmgr = pjmedia_endpt_get_codec_mgr(app.mept); |
| |
| /* Get codec info and param for the specified payload type */ |
| app.pt = pkt0.rtp->pt; |
| T( pjmedia_codec_mgr_get_codec_info(cmgr, pkt0.rtp->pt, &ci) ); |
| T( pjmedia_codec_mgr_get_default_param(cmgr, ci, ¶m) ); |
| |
| /* Alloc and init codec */ |
| T( pjmedia_codec_mgr_alloc_codec(cmgr, ci, &app.codec) ); |
| T( app.codec->op->init(app.codec, app.pool) ); |
| T( app.codec->op->open(app.codec, ¶m) ); |
| |
| /* Open WAV file */ |
| samples_per_frame = ci->clock_rate * param.info.frm_ptime / 1000; |
| T( pjmedia_wav_writer_port_create(app.pool, wav_filename, |
| ci->clock_rate, ci->channel_cnt, |
| samples_per_frame, |
| param.info.pcm_bits_per_sample, 0, 0, |
| &app.wav) ); |
| |
| /* Loop reading PCAP and writing WAV file */ |
| for (;;) { |
| struct pkt pkt1; |
| pj_timestamp ts; |
| pjmedia_frame frames[16], pcm_frame; |
| short pcm[320]; |
| unsigned i, frame_cnt; |
| long samples_cnt, ts_gap; |
| |
| pj_assert(sizeof(pcm) >= samples_per_frame); |
| |
| /* Parse first packet */ |
| ts.u64 = 0; |
| frame_cnt = PJ_ARRAY_SIZE(frames); |
| T( app.codec->op->parse(app.codec, pkt0.payload, pkt0.payload_len, |
| &ts, &frame_cnt, frames) ); |
| |
| /* Decode and write to WAV file */ |
| samples_cnt = 0; |
| for (i=0; i<frame_cnt; ++i) { |
| pjmedia_frame pcm_frame; |
| |
| pcm_frame.buf = pcm; |
| pcm_frame.size = samples_per_frame * 2; |
| |
| T( app.codec->op->decode(app.codec, &frames[i], pcm_frame.size, |
| &pcm_frame) ); |
| T( pjmedia_port_put_frame(app.wav, &pcm_frame) ); |
| samples_cnt += samples_per_frame; |
| } |
| |
| /* Read next packet */ |
| read_rtp(pkt1.buffer, sizeof(pkt1.buffer), &pkt1.rtp, |
| &pkt1.payload, &pkt1.payload_len); |
| |
| /* Fill in the gap (if any) between pkt0 and pkt1 */ |
| ts_gap = pj_ntohl(pkt1.rtp->ts) - pj_ntohl(pkt0.rtp->ts) - |
| samples_cnt; |
| while (ts_gap >= (long)samples_per_frame) { |
| |
| pcm_frame.buf = pcm; |
| pcm_frame.size = samples_per_frame * 2; |
| |
| if (app.codec->op->recover) { |
| T( app.codec->op->recover(app.codec, pcm_frame.size, |
| &pcm_frame) ); |
| } else { |
| pj_bzero(pcm_frame.buf, pcm_frame.size); |
| } |
| |
| T( pjmedia_port_put_frame(app.wav, &pcm_frame) ); |
| ts_gap -= samples_per_frame; |
| } |
| |
| /* Next */ |
| pkt0 = pkt1; |
| pkt0.rtp = (pjmedia_rtp_hdr*)pkt0.buffer; |
| pkt0.payload = pkt0.buffer + (pkt1.payload - pkt1.buffer); |
| } |
| } |
| |
| |
| int main(int argc, char *argv[]) |
| { |
| pj_str_t input, output, wav, srtp_crypto, srtp_key; |
| pj_pcap_filter filter; |
| pj_status_t status; |
| |
| enum { OPT_SRC_IP = 1, OPT_DST_IP, OPT_SRC_PORT, OPT_DST_PORT }; |
| struct pj_getopt_option long_options[] = { |
| { "srtp-crypto", 1, 0, 'c' }, |
| { "srtp-key", 1, 0, 'k' }, |
| { "src-ip", 1, 0, OPT_SRC_IP }, |
| { "dst-ip", 1, 0, OPT_DST_IP }, |
| { "src-port", 1, 0, OPT_SRC_PORT }, |
| { "dst-port", 1, 0, OPT_DST_PORT }, |
| { NULL, 0, 0, 0} |
| }; |
| int c; |
| int option_index; |
| char key_bin[32]; |
| |
| srtp_crypto.slen = srtp_key.slen = 0; |
| |
| pj_pcap_filter_default(&filter); |
| filter.link = PJ_PCAP_LINK_TYPE_ETH; |
| filter.proto = PJ_PCAP_PROTO_TYPE_UDP; |
| |
| /* Parse arguments */ |
| pj_optind = 0; |
| while((c=pj_getopt_long(argc,argv, "c:k:", long_options, &option_index))!=-1) { |
| switch (c) { |
| case 'c': |
| srtp_crypto = pj_str(pj_optarg); |
| break; |
| case 'k': |
| { |
| int key_len = sizeof(key_bin); |
| srtp_key = pj_str(pj_optarg); |
| if (pj_base64_decode(&srtp_key, (pj_uint8_t*)key_bin, &key_len)) { |
| puts("Error: invalid key"); |
| return 1; |
| } |
| srtp_key.ptr = key_bin; |
| srtp_key.slen = key_len; |
| } |
| break; |
| case OPT_SRC_IP: |
| { |
| pj_str_t t = pj_str(pj_optarg); |
| pj_in_addr a = pj_inet_addr(&t); |
| filter.ip_src = a.s_addr; |
| } |
| break; |
| case OPT_DST_IP: |
| { |
| pj_str_t t = pj_str(pj_optarg); |
| pj_in_addr a = pj_inet_addr(&t); |
| filter.ip_dst = a.s_addr; |
| } |
| break; |
| case OPT_SRC_PORT: |
| filter.src_port = pj_htons((pj_uint16_t)atoi(pj_optarg)); |
| break; |
| case OPT_DST_PORT: |
| filter.dst_port = pj_htons((pj_uint16_t)atoi(pj_optarg)); |
| break; |
| default: |
| puts("Error: invalid option"); |
| return 1; |
| } |
| } |
| |
| if (pj_optind != argc - 2) { |
| puts(USAGE); |
| return 1; |
| } |
| |
| if (!(srtp_crypto.slen) != !(srtp_key.slen)) { |
| puts("Error: both SRTP crypto and key must be specified"); |
| puts(USAGE); |
| return 1; |
| } |
| |
| input = pj_str(argv[pj_optind]); |
| output = pj_str(argv[pj_optind+1]); |
| wav = pj_str(".wav"); |
| |
| T( pj_init() ); |
| |
| pj_caching_pool_init(&app.cp, NULL, 0); |
| app.pool = pj_pool_create(&app.cp.factory, "pcaputil", 1000, 1000, NULL); |
| |
| T( pjlib_util_init() ); |
| T( pjmedia_endpt_create(&app.cp.factory, NULL, 0, &app.mept) ); |
| |
| T( pj_pcap_open(app.pool, input.ptr, &app.pcap) ); |
| T( pj_pcap_set_filter(app.pcap, &filter) ); |
| |
| if (pj_stristr(&output, &wav)) { |
| pcap2wav(output.ptr, &srtp_crypto, &srtp_key); |
| } else { |
| err_exit("invalid output file", PJ_EINVAL); |
| } |
| |
| pjmedia_endpt_destroy(app.mept); |
| pj_pool_release(app.pool); |
| pj_caching_pool_destroy(&app.cp); |
| pj_shutdown(); |
| return 0; |
| } |
| |