static packet *TcpCaDissector(int flow_id) { packet *pkt; tca_flow flw; /* init */ memset(&flw, 0, sizeof(tca_flow)); flw.flow_id = flow_id; TcpCaDisFlowInit(&flw); FlowSetTimeOut(flow_id, -1); pkt = FlowGetPkt(flow_id); while (pkt != NULL) { if (TcpCaDisFlowSetUp(&flw, pkt) == 0) { pkt = NULL; break; } pkt = FlowGetPkt(flow_id); } pkt = FlowGetPkt(flow_id); while (pkt != NULL) { TcpCaDisFlow(&flw, pkt); pkt = FlowGetPkt(flow_id); } TcpCaDisFlowEnd(&flw); return NULL; }
static packet* RtpDissector(int flow_id) { struct in_addr ip_addr; struct in6_addr ipv6_addr; const pstack_f *udp, *ip; ftval port_src, port_dst, offset, phone; char ips_str[INET6_ADDRSTRLEN], ipd_str[INET6_ADDRSTRLEN]; rtp_priv *priv; packet *pkt; int rid, ret, gid, rtcp_fid; cmp_val rip, rport; char tmp_file_1[256]; char tmp_file_2[256]; char media_file_1[256]; char media_file_2[256]; char media_conv[256]; FILE *fp_pcap_1, *fp_pcap_2, *fp_pcap; struct pcap_file_header fh; struct pcappkt_hdr pckt_header; struct stat fsbuf; char cmd[1024]; size_t nwrt, wcnt; time_t tstart, tend; pei *ppei; pei_component *cmpn; bool aud1, aud2; unsigned short pkt_cnt; LogPrintf(LV_DEBUG, "RTP id: %d", flow_id); gid = FlowGrpId(flow_id); priv = DMemMalloc(sizeof(rtp_priv)); memset(priv, 0, sizeof(rtp_priv)); udp = FlowStack(flow_id); ip = ProtGetNxtFrame(udp); ProtGetAttr(udp, uport_src_id, &port_src); ProtGetAttr(udp, uport_dst_id, &port_dst); priv->port_s = port_src.uint16; priv->port_d = port_dst.uint16; priv->stack = udp; if (priv->port_s != port_dst.uint16) priv->port_diff = TRUE; priv->ipv6 = TRUE; if (ProtFrameProtocol(ip) == ip_id) priv->ipv6 = FALSE; if (priv->ipv6 == FALSE) { ProtGetAttr(ip, ip_src_id, &priv->ip_s); ProtGetAttr(ip, ip_dst_id, &priv->ip_d); ip_addr.s_addr = priv->ip_s.uint32; inet_ntop(AF_INET, &ip_addr, ips_str, INET6_ADDRSTRLEN); ip_addr.s_addr = priv->ip_d.uint32; inet_ntop(AF_INET, &ip_addr, ipd_str, INET6_ADDRSTRLEN); } else { ProtGetAttr(ip, ipv6_src_id, &priv->ip_s); ProtGetAttr(ip, ipv6_dst_id, &priv->ip_d); memcpy(ipv6_addr.s6_addr, priv->ip_s.ipv6, sizeof(priv->ip_s.ipv6)); inet_ntop(AF_INET6, &ipv6_addr, ips_str, INET6_ADDRSTRLEN); memcpy(ipv6_addr.s6_addr, priv->ip_d.ipv6, sizeof(priv->ip_d.ipv6)); inet_ntop(AF_INET6, &ipv6_addr, ipd_str, INET6_ADDRSTRLEN); } LogPrintf(LV_DEBUG, "\tSRC: %s:%d", ips_str, port_src.uint16); LogPrintf(LV_DEBUG, "\tDST: %s:%d", ipd_str, port_dst.uint16); /* RTCP flow search */ rid = -1; rtcp_fid = -1; if (rtcp_id != -1) { rid = GrpRuleNew(flow_id); if (priv->ipv6 == TRUE) { rip.prot = ipv6_id; rip.att = ipv6_dst_id; FTCopy(&rip.val, &priv->ip_d, FT_IPv6); } else { rip.prot = ip_id; rip.att = ip_dst_id; rip.val.uint32 = priv->ip_d.uint32; } rport.prot = udp_id; rport.att = uport_dst_id; port_dst.uint16++; rport.val.int16 = port_dst.uint16; GrpRule(rid, 2, &rip, &rport); if (priv->ipv6 == TRUE) { rip.att = ipv6_src_id; } else { rip.att = ip_src_id; } rport.att = uport_src_id; GrpRule(rid, 2, &rip, &rport); GrpRuleCmplt(rid); LogPrintf(LV_DEBUG, "Rule rtcp %i, port:%i", rid, port_dst.uint16); } /* put packets in the pcap files */ sprintf(tmp_file_1, "%s/%s/rtp_1_%d_%lu_%d.pcap", ProtTmpDir(), RTP_TMP_DIR, incr, time(NULL), port_src.uint16); sprintf(tmp_file_2, "%s/%s/rtp_2_%d_%lu_%d.pcap", ProtTmpDir(), RTP_TMP_DIR, incr, time(NULL), port_src.uint16); sprintf(media_conv, "%s/%s/rtp_%d_%lu_%d", ProtTmpDir(), RTP_TMP_DIR, incr, time(NULL), port_src.uint16); incr++; fp_pcap_1 = fopen(tmp_file_1, "w"); fp_pcap_2 = fopen(tmp_file_2, "w"); memset(&fh, 0, sizeof(struct pcap_file_header)); fh.magic = 0xA1B2C3D4; fh.version_major = PCAP_VERSION_MAJOR; fh.version_minor = PCAP_VERSION_MINOR; fh.snaplen = 65535; fh.linktype = DLT_RAW; if (fp_pcap_1 != NULL) { fwrite((char *)&fh, 1, sizeof(struct pcap_file_header), fp_pcap_1); } if (fp_pcap_2 != NULL) { fwrite((char *)&fh, 1, sizeof(struct pcap_file_header), fp_pcap_2); } /* first packet */ pkt_cnt = 0; pkt = FlowGetPkt(flow_id); /* start time */ if (pkt != NULL) { /* pei definition */ PeiNew(&ppei, rtp_id); PeiCapTime(ppei, pkt->cap_sec); PeiMarker(ppei, pkt->serial); PeiStackFlow(ppei, udp); tstart = pkt->cap_sec; } while (pkt != NULL) { pkt_cnt++; /* check if exit rtcp "stream" */ if (rid != -1) { rtcp_fid = GrpLink(gid); if (rtcp_fid != -1) { FlowSyncr(flow_id, FALSE); FlowSyncr(rtcp_fid, FALSE); PeiAddStkGrp(ppei, FlowStack(rtcp_fid)); rid = -1; } } tend = pkt->cap_sec; if (priv->ipv6) { ip = ProtStackSearchProt(pkt->stk, ipv6_id); ProtGetAttr(ip, ipv6_offset_id, &offset); wcnt = offset.uint32; } else { ip = ProtStackSearchProt(pkt->stk, ip_id); ProtGetAttr(ip, ip_offset_id, &offset); wcnt = offset.uint32; } pckt_header.caplen = pkt->raw_len - wcnt; pckt_header.len = pkt->raw_len - wcnt; pckt_header.tv_sec = pkt->cap_sec; pckt_header.tv_usec = pkt->cap_usec; if (RtpClientPkt(priv, pkt)) { fp_pcap = fp_pcap_1; } else { fp_pcap = fp_pcap_2; } if (fp_pcap != NULL) { wcnt = 0; do { nwrt = fwrite(((char *)&pckt_header)+wcnt, 1, sizeof(struct pcappkt_hdr)-wcnt, fp_pcap); if (nwrt != -1) wcnt += nwrt; else break; } while (wcnt != sizeof(struct pcappkt_hdr)); wcnt = offset.uint32; do { nwrt = fwrite(((char *)pkt->raw)+wcnt, 1, pkt->raw_len-wcnt, fp_pcap); if (nwrt != -1) wcnt += nwrt; else break; } while (wcnt != pkt->raw_len); } PktFree(pkt); pkt = FlowGetPkt(flow_id); } /* close file */ if (fp_pcap_1 != NULL) fclose(fp_pcap_1); if (fp_pcap_1 != NULL) fclose(fp_pcap_2); /* remove rtcp rule */ if (rid != -1) { rtcp_fid = GrpLink(gid); if (rtcp_fid != -1) { FlowSyncr(flow_id, FALSE); FlowSyncr(rtcp_fid, FALSE); PeiAddStkGrp(ppei, FlowStack(rtcp_fid)); rid = -1; } else { GrpRuleRm(rid); } } /* decode rtcp packet */ if (rtcp_fid != -1) { /* new priv data */ priv->port_s++; priv->port_d++; pkt = FlowGetPkt(rtcp_fid); while (pkt != NULL) { pkt = ProtDissecPkt(rtcp_id, pkt); if (pkt != NULL) { ProtGetAttr(pkt->stk, rtcp_phone_id, &phone); if (RtcpClientPkt(priv, pkt)) { strcpy(ipd_str, phone.str); } else { strcpy(ips_str, phone.str); } PktFree(pkt); } pkt = FlowGetPkt(rtcp_fid); } } /* audio decoding */ sprintf(cmd, "./videosnarf -i %s -o %s 2>/dev/null 1>/dev/null", tmp_file_1, tmp_file_1); ret = system(cmd); if (ret == -1) { LogPrintf(LV_WARNING, "videosnarf failed"); } else if (WEXITSTATUS(ret) != 0) { LogPrintf(LV_WARNING, "videosnarf crash"); } sprintf(cmd, "./videosnarf -i %s -o %s 2>/dev/null 1>/dev/null", tmp_file_2, tmp_file_2); ret = system(cmd); if (ret == -1) { LogPrintf(LV_WARNING, "videosnarf failed"); } else if (WEXITSTATUS(ret) != 0) { LogPrintf(LV_WARNING, "videosnarf crash"); } /* delete temporary files */ #if DEBUG_RM remove(tmp_file_1); remove(tmp_file_2); #endif /* media file check */ sprintf(media_file_1, "%s-media-1.wav", tmp_file_1); sprintf(media_file_2, "%s-media-1.wav", tmp_file_2); /* complete pei */ /* from */ PeiNewComponent(&cmpn, pei_from); PeiCompCapTime(cmpn, tstart); PeiCompAddStingBuff(cmpn, ipd_str); PeiAddComponent(ppei, cmpn); /* to */ PeiNewComponent(&cmpn, pei_to); PeiCompCapTime(cmpn, tstart); PeiCompAddStingBuff(cmpn, ips_str); PeiAddComponent(ppei, cmpn); /* duration */ sprintf(cmd, "%lu", tend-tstart); PeiNewComponent(&cmpn, pei_duration); PeiCompCapTime(cmpn, tstart); PeiCompAddStingBuff(cmpn, cmd); PeiAddComponent(ppei, cmpn); /* audio from */ aud2 = FALSE; if (stat(media_file_2, &fsbuf) == 0) { aud2 = TRUE; /* convert to be used with lame */ sprintf(tmp_file_2, "%s_2.wav", media_conv); sprintf(cmd, "sox %s -s %s 2>/dev/null 1>/dev/null", media_file_2, tmp_file_2); ret = system(cmd); #if DEBUG_RM remove(media_file_2); #endif /* mp3 conversion */ sprintf(media_file_2, "%s_2.mp3", media_conv); sprintf(cmd, "lame --quiet -h %s %s 2>/dev/null 1>/dev/null", tmp_file_2, media_file_2); ret = system(cmd); if (ret == -1) { LogPrintf(LV_WARNING, "lame failed"); } else if (WEXITSTATUS(ret) != 0) { LogPrintf(LV_WARNING, "lame crash (%i): %s", WEXITSTATUS(ret), cmd); } if (stat(media_file_2, &fsbuf) == 0) { PeiNewComponent(&cmpn, pei_audio_from); PeiCompCapTime(cmpn, tstart); PeiCompCapEndTime(cmpn, tend); PeiCompAddFile(cmpn, "audio_caller.mp3", media_file_2, fsbuf.st_size); PeiAddComponent(ppei, cmpn); } sprintf(media_file_2, "%s_stereo_2.wav", media_conv); sprintf(cmd, "sox %s -c 2 %s pan 1 2>/dev/null 1>/dev/null", tmp_file_2, media_file_2); ret = system(cmd); #if DEBUG_RM remove(tmp_file_2); #endif } /* audio to */ aud1 = FALSE; if (stat(media_file_1, &fsbuf) == 0) { aud1 = TRUE; /* convert to be used with lame */ sprintf(tmp_file_1, "%s_1.wav", media_conv); sprintf(cmd, "sox %s -s %s 2>/dev/null 1>/dev/null", media_file_1, tmp_file_1); ret = system(cmd); #if DEBUG_RM remove(media_file_1); #endif /* mp3 conversion */ sprintf(media_file_1, "%s_1.mp3", media_conv); sprintf(cmd, "lame --quiet -h %s %s 2>/dev/null 1>/dev/null", tmp_file_1, media_file_1); ret = system(cmd); if (ret == -1) { LogPrintf(LV_WARNING, "lame failed"); } else if (WEXITSTATUS(ret) != 0) { LogPrintf(LV_WARNING, "lame crash (%i): %s", WEXITSTATUS(ret), cmd); } if (stat(media_file_1, &fsbuf) == 0) { PeiNewComponent(&cmpn, pei_audio_to); PeiCompCapTime(cmpn, tstart); PeiCompCapEndTime(cmpn, tend); PeiCompAddFile(cmpn, "audio_called.mp3", media_file_1, fsbuf.st_size); PeiAddComponent(ppei, cmpn); } sprintf(media_file_1, "%s_stereo_1.wav", media_conv); sprintf(cmd, "sox %s -c 2 %s pan -1 2>/dev/null 1>/dev/null", tmp_file_1, media_file_1); ret = system(cmd); #if DEBUG_RM remove(tmp_file_1); #endif } /* mix audio */ if (aud2 || aud1) { /* mix two audio files */ sprintf(tmp_file_1, "%s_mix.wav", media_conv); sprintf(tmp_file_2, "%s_mix.mp3", media_conv); if (aud1 == FALSE) { sprintf(cmd, "sox %s %s 2>/dev/null 1>/dev/null", media_file_2, tmp_file_1); } else if (aud2 == FALSE) { sprintf(cmd, "sox %s %s 2>/dev/null 1>/dev/null", media_file_1, tmp_file_1); } else { sprintf(cmd, "sox -m %s %s -s %s 2>/dev/null 1>/dev/null", media_file_2, media_file_1, tmp_file_1); } ret = system(cmd); if (ret == -1) { LogPrintf(LV_WARNING, "sox failed"); } else if (WEXITSTATUS(ret) != 0) { LogPrintf(LV_WARNING, "sox mix crash: %s", cmd); } /* mp3 conversion */ sprintf(cmd, "lame --quiet -h %s %s 2>/dev/null 1>/dev/null", tmp_file_1, tmp_file_2); ret = system(cmd); /* delete temporary files */ #if DEBUG_RM remove(media_file_1); remove(media_file_2); remove(tmp_file_1); #endif if (stat(tmp_file_2, &fsbuf) == 0) { PeiNewComponent(&cmpn, pei_audio_mix); PeiCompCapTime(cmpn, tstart); PeiCompCapEndTime(cmpn, tend); PeiCompAddFile(cmpn, "audio_mix.mp3", tmp_file_2, fsbuf.st_size); PeiAddComponent(ppei, cmpn); } } /* insert pei */ PeiIns(ppei); /* free */ DMemFree(priv); LogPrintf(LV_DEBUG, "RTP... bye bye fid:%d (pkt:%i)", flow_id, pkt_cnt); return NULL; }
static packet *SyslogDissector(int flow_id) { packet *pkt; const pstack_f *udp, *ip; const char *msg; ftval val; char file_log[SYSLOG_FILENAME_PATH_SIZE]; char host[SYSLOG_FILENAME_PATH_SIZE]; pei *ppei; pei_component *cmpn; time_t cap_sec, end_cap; int cntpkt, len; short pri, fac, sev; FILE *fp; ppei = NULL; LogPrintf(LV_DEBUG, "Syslog id: %d", flow_id); cntpkt = 0; /* ip version and number */ udp = FlowStack(flow_id); /* udp frame */ ip = ProtGetNxtFrame(udp); /* ip/ipv6 frame */ ProtStackFrmDisp(udp, TRUE); /* host */ len = 0; if (ProtFrameProtocol(ip) == ip_id) { ProtGetAttr(ip, ip_src_id, &val); if (DnsDbSearch(&val, FT_IPv4, host+len, SYSLOG_FILENAME_PATH_SIZE - len) != 0) { FTString(&val, FT_IPv4, host+len); } len = strlen(host); host[len++] = ' '; host[len++] = '-'; host[len++] = ' '; ProtGetAttr(ip, ip_dst_id, &val); if (DnsDbSearch(&val, FT_IPv4, host+len, SYSLOG_FILENAME_PATH_SIZE - len) != 0) { FTString(&val, FT_IPv4, host+len); } } else { ProtGetAttr(ip, ipv6_src_id, &val); if (DnsDbSearch(&val, FT_IPv6, host+len, SYSLOG_FILENAME_PATH_SIZE - len) != 0) { FTString(&val, FT_IPv6, host+len); } host[len++] = ' '; host[len++] = '-'; host[len++] = ' '; ProtGetAttr(ip, ipv6_dst_id, &val); if (DnsDbSearch(&val, FT_IPv6, host+len, SYSLOG_FILENAME_PATH_SIZE - len) != 0) { FTString(&val, FT_IPv6, host+len); } } len = strlen(host); /* syslog file */ sprintf(file_log, "%s/%s/syslog_%p_%lu.log", ProtTmpDir(), SYSLOG_TMP_DIR, file_log,incr++); fp = fopen(file_log, "w"); /* first packet */ pkt = FlowGetPkt(flow_id); if (pkt != NULL) { /* pei definition */ PeiNew(&ppei, prot_id); PeiCapTime(ppei, pkt->cap_sec); PeiMarker(ppei, pkt->serial); PeiStackFlow(ppei, udp); cap_sec = pkt->cap_sec; } if (fp != NULL) { while (pkt != NULL) { cntpkt++; end_cap = pkt->cap_sec; pri = SyslogPri(pkt->data, pkt->len); if (pri != -1) { msg = SyslogMsg(pkt->data, pkt->len); if (msg != NULL) { sev = pri & 0x07; fac = pri >> 3; fprintf(fp, "{%s.%s} %s", facility[fac], severity[sev], msg); } } PktFree(pkt); pkt = FlowGetPkt(flow_id); }
static packet *TcpCaDissectorGrp(int flow_id) { int id; packet *pkt; tca_flow *init; tca_flow *setup; tca_flow *runing; tca_flow *elem, *tmp; bool loop, wpkt, all; unsigned int flow_t; struct timespec req; unsigned long pkt_num; /* init */ init = setup = runing = NULL; loop = all = TRUE; flow_t = 0; req.tv_sec = 0; req.tv_nsec = 50000000; pthread_mutex_lock(&pthrs_mux); for (id=0; id!=pthrs_dim; id++) { if (prl_thrs_en[id] == 1) { if (flow_id == prl_thrs[id]->flow_id) break; elem = prl_thrs[id]->nxt; while (elem != NULL) { if (flow_id == elem->flow_id) { break; } elem = elem->nxt; } if (elem != NULL) break; } } if (id == pthrs_dim) { LogPrintf(LV_FATAL, "Thread didn't seleced\n"); printf("Thread didn't seleced %i\n", flow_id); for (id=0; id!=pthrs_dim; id++) { if (prl_thrs_en[id] == 1) printf("id: %i st: %i flw: %i\n", id, prl_thrs_en[id], prl_thrs[id]->flow_id); } exit(-1); } prl_thrs_en[id] = 2; pthread_mutex_unlock(&pthrs_mux); do { wpkt = TRUE; /* new flow */ pthread_mutex_lock(&pthrs_mux); init = prl_thrs[id]; prl_thrs[id] = NULL; pthread_mutex_unlock(&pthrs_mux); while (init != NULL) { flow_t++; tmp = init->nxt; init->nxt = setup; if (setup != NULL) { setup->pre = init; } setup = init; TcpCaDisFlowInit(init); init = tmp; } /* flow setup */ elem = setup; while (elem != NULL) { tmp = elem->nxt; pkt = FlowGetPkt(elem->flow_id); if (pkt != NULL) { wpkt = FALSE; do { if (TcpCaDisFlowSetUp(elem, pkt) == 0) { if (elem->nxt != NULL) { elem->nxt->pre = elem->pre; } if (elem->pre != NULL) { elem->pre->nxt = elem->nxt; elem->pre = NULL; } else if (elem == setup) { setup = elem->nxt; } elem->nxt = runing; if (runing != NULL) { runing->pre = elem; } runing = elem; break; } pkt = FlowGetPkt(elem->flow_id); } while (pkt != NULL); } else { if (FlowIsEmpty(elem->flow_id)) { flow_t--; if (elem->nxt != NULL) { elem->nxt->pre = elem->pre; } if (elem->pre != NULL) { elem->pre->nxt = elem->nxt; elem->pre = NULL; } else if (elem == setup) { setup = elem->nxt; } TcpCaDisFlowEnd(elem); } } elem = tmp; } /* flow elaboration */ elem = runing; while (elem != NULL) { if (all == FALSE) { if (elem->pkt_elb == 0) break; } tmp = elem->nxt; pkt = FlowGetPkt(elem->flow_id); if (pkt != NULL) { pkt_num = 0; wpkt = FALSE; do { pkt_num++; TcpCaDisFlow(elem, pkt); pkt = FlowGetPkt(elem->flow_id); } while (pkt != NULL); elem->pkt_elb = pkt_num; FlowEval(&runing, elem); } else { if (FlowIsEmpty(elem->flow_id)) { flow_t--; if (elem->nxt != NULL) { elem->nxt->pre = elem->pre; } if (elem->pre != NULL) { elem->pre->nxt = elem->nxt; elem->pre = NULL; } else if (elem == runing) { runing = elem->nxt; } TcpCaDisFlowEnd(elem); } } elem = tmp; } all = FALSE; /* check */ if (runing == NULL && setup == NULL) { pthread_mutex_lock(&pthrs_mux); if (prl_thrs[id] == NULL) { prl_thrs_en[id] = 0; loop = FALSE; } pthread_mutex_unlock(&pthrs_mux); } else if (wpkt) { nanosleep(&req, NULL); all = TRUE; } } while (loop); return NULL; }
static packet *TelnetDissector(int flow_id) { packet *pkt; const pstack_f *tcp, *ip; ftval lost, ip_host, port; unsigned short port_host; bool ipv6; long offset, len, size; char host[TELNET_FILENAME_PATH_SIZE]; char user[TELNET_BUF_SIZE]; char password[TELNET_BUF_SIZE]; char cmd_file[TELNET_FILENAME_PATH_SIZE]; FILE *fp; char *buf; pei *ppei; time_t cap_sec, end_cap; int cntpkt; LogPrintf(LV_DEBUG, "Telnet id: %d", flow_id); cntpkt = 0; /* init (this for each telnet stream) */ user[0] = '\0'; password[0] = '\0'; sprintf(cmd_file, "%s/%s/telnet_%lu_%p_%i.txt", ProtTmpDir(), TELNET_TMP_DIR, time(NULL), cmd_file, incr); incr++; fp = fopen(cmd_file, "w"); ipv6 = FALSE; buf = DMemMalloc(TELNET_LOGIN_SIZE); buf[0] = '\0'; len = 0; /* ip version and number */ tcp = FlowStack(flow_id); /* tcp frame */ ip = ProtGetNxtFrame(tcp); /* ip/ipv6 frame */ ProtGetAttr(tcp, port_dst_id, &port); port_host = port.uint16; if (ProtFrameProtocol(ip) == ipv6_id) { ipv6 = TRUE; } if (ipv6 == FALSE) { ProtGetAttr(ip, ip_dst_id, &ip_host); if (DnsDbSearch(&(ip_host), FT_IPv4, host, TELNET_FILENAME_PATH_SIZE) != 0) { FTString(&(ip_host), FT_IPv4, host); } } else { ProtGetAttr(ip, ipv6_dst_id, &ip_host); if (DnsDbSearch(&(ip_host), FT_IPv6, host, TELNET_FILENAME_PATH_SIZE) != 0) { FTString(&(ip_host), FT_IPv6, host); } } sprintf(host+strlen(host), ":%i", port_host); /* first packet */ pkt = FlowGetPkt(flow_id); if (pkt != NULL) { /* pei definition */ PeiNew(&ppei, telnet_id); PeiCapTime(ppei, pkt->cap_sec); PeiMarker(ppei, pkt->serial); PeiStackFlow(ppei, tcp); cap_sec = pkt->cap_sec; } while (pkt != NULL) { cntpkt++; end_cap = pkt->cap_sec; offset = 0; /* check if there are packet lost */ ProtGetAttr(pkt->stk, lost_id, &lost); //ProtStackFrmDisp(pkt->stk, TRUE); /* this function display the structure of packet stack of this packet */ if (lost.uint8 == FALSE && pkt->len != 0) { /* no packet lost and packet with data */ /* skip the telnet commands, we are interested only in readable data */ #warning "to do: reassemble telnet message from many tcp packets" offset = TelnetSkipCommand((unsigned char *)(pkt->data), (unsigned char *)(pkt->data + pkt->len)); if (offset < pkt->len) { TelnetConvertZeros((unsigned char *)(pkt->data + offset), (unsigned char *)(pkt->data + pkt->len)); size = pkt->len - offset; fwrite(pkt->data + offset, 1, size, fp); if (len + size < TELNET_LOGIN_SIZE) { memcpy(buf+len, pkt->data + offset, size); len += size; buf[len] = '\0'; } } } else if (lost.uint8) { fprintf(fp, "-----> xplico: packets lost (size: %lub) <-----", pkt->len); } /* new/next packet */ PktFree(pkt); pkt = FlowGetPkt(flow_id); } /* search login */ buf[TELNET_LOGIN_SIZE - 1] = '\0'; TelnetLogin(buf, user, password, TELNET_BUF_SIZE); /* free memory and close file */ DMemFree(buf); if (fp != NULL) { fclose(fp); } if (len != 0) { /* compose pei */ TelnetPei(ppei, host, user, password, cmd_file, &cap_sec, &end_cap); /* insert pei */ PeiIns(ppei); } LogPrintf(LV_DEBUG, "Telnet... bye bye. (count:%i)", cntpkt); return NULL; }
packet *TcpGrbDissector(int flow_id) { packet *pkt, *opkt; tgrb_priv *priv; const pstack_f *tcp, *ip; ftval port_src, port_dst, lost; struct in_addr ip_addr; struct in6_addr ipv6_addr; char ips_str[INET6_ADDRSTRLEN], ipd_str[INET6_ADDRSTRLEN]; bool ipv4; int dig_s, dig_d, *dig_x; int count, i, j, k; int threshold; bool txt_data; FILE *txt_fp; char txt_file[TCP_GRB_FILENAME_PATH_SIZE]; unsigned char *thrs; pei *ppei; time_t cap_sec, end_cap; #if GRB_FILE int fd_pcap; char filename[TCP_GRB_FILENAME_PATH_SIZE]; int prot; struct pcap_file_header fh; struct pcappkt_hdr pckt_header; #endif size_t flow_size; bool first_lost, dig_end; dig *dig_srch_a, *dig_srch_b, *dig_srch; char buff[TCP_CFG_LINE_MAX_SIZE]; char *l7prot_type; struct ndpi_flow_struct *l7flow; struct ndpi_id_struct *l7src, *l7dst; ndpi_protocol l7prot_id; unsigned char stage; LogPrintf(LV_DEBUG, "TCP garbage id: %d", flow_id); /* ndpi init */ l7flow = xcalloc(1, ndpi_flow_struct_size); if (l7flow == NULL) { LogPrintf(LV_ERROR, "Out of memory"); l7src = NULL; l7dst = NULL; } else { l7src = xcalloc(1, ndpi_proto_size); if (l7src != NULL) { l7dst = xcalloc(1, ndpi_proto_size); if (l7dst == NULL) { xfree(l7src); xfree(l7flow); l7src = NULL; l7flow = NULL; } } else { xfree(l7flow); l7flow = NULL; l7dst = NULL; } } /* dig init */ dig_srch_a = dig_srch_b = NULL; if (enable_dig) { dig_s = dig_d = -1; dig_x = NULL; dig_srch_a = xmalloc(sizeof(dig) * dig_type_dim); dig_srch_b = xmalloc(sizeof(dig) * dig_type_dim); if (dig_srch_a != NULL && dig_srch_b != NULL) { memset(dig_srch_a, 0, sizeof(dig) * dig_type_dim); memset(dig_srch_b, 0, sizeof(dig) * dig_type_dim); for (i=0; i!=dig_type_dim; i++) { dig_srch_a[i].ft = &(dig_tbl[i]); dig_srch_b[i].ft = &(dig_tbl[i]); dig_srch_a[i].dig_sync = -1; dig_srch_b[i].dig_sync = -1; } } else { if (dig_srch_a != NULL) xfree(dig_srch_a); if (dig_srch_b != NULL) xfree(dig_srch_b); dig_srch_a = dig_srch_b = NULL; } } /* init */ priv = DMemMalloc(sizeof(tgrb_priv)); memset(priv, 0, sizeof(tgrb_priv)); tcp = FlowStack(flow_id); ip = ProtGetNxtFrame(tcp); ProtGetAttr(tcp, port_src_id, &port_src); ProtGetAttr(tcp, port_dst_id, &port_dst); priv->port_s = port_src.uint16; priv->port_d = port_dst.uint16; priv->stack = tcp; if (priv->port_s != port_dst.uint16) priv->port_diff = TRUE; priv->ipv6 = TRUE; ipv4 = FALSE; first_lost = FALSE; stage = 0; if (ProtFrameProtocol(ip) == ip_id) { ipv4 = TRUE; priv->ipv6 = FALSE; } if (ipv4) { ProtGetAttr(ip, ip_src_id, &priv->ip_s); ProtGetAttr(ip, ip_dst_id, &priv->ip_d); ip_addr.s_addr = priv->ip_s.uint32; inet_ntop(AF_INET, &ip_addr, ips_str, INET6_ADDRSTRLEN); ip_addr.s_addr = priv->ip_d.uint32; inet_ntop(AF_INET, &ip_addr, ipd_str, INET6_ADDRSTRLEN); } else { ProtGetAttr(ip, ipv6_src_id, &priv->ip_s); ProtGetAttr(ip, ipv6_dst_id, &priv->ip_d); memcpy(ipv6_addr.s6_addr, priv->ip_s.ipv6, sizeof(priv->ip_s.ipv6)); inet_ntop(AF_INET6, &ipv6_addr, ips_str, INET6_ADDRSTRLEN); memcpy(ipv6_addr.s6_addr, priv->ip_d.ipv6, sizeof(priv->ip_d.ipv6)); inet_ntop(AF_INET6, &ipv6_addr, ipd_str, INET6_ADDRSTRLEN); } LogPrintf(LV_DEBUG, "\tSRC: %s:%d", ips_str, port_src.uint16); LogPrintf(LV_DEBUG, "\tDST: %s:%d", ipd_str, port_dst.uint16); /* file pcap */ #if GRB_FILE sprintf(filename, "%s/tcp_%d_grb_%s_%s.pcap", ProtTmpDir(), serial, ips_str, ipd_str); serial++; fd_pcap = open(filename, O_WRONLY | O_CREAT, 0x01B6); memset(&fh, 0, sizeof(struct pcap_file_header)); fh.magic = 0xA1B2C3D4; fh.version_major = PCAP_VERSION_MAJOR; fh.version_minor = PCAP_VERSION_MINOR; fh.snaplen = 65535; if (ProtGetNxtFrame(ip) != NULL) { prot = ProtFrameProtocol(ProtGetNxtFrame(ip)); if (prot == eth_id) fh.linktype = DLT_EN10MB; else if (prot == ppp_id) fh.linktype = DLT_PPP; else fh.linktype = DLT_RAW; } if (fd_pcap != -1) write(fd_pcap, (char *)&fh, sizeof(struct pcap_file_header)); #endif l7prot_type = NULL; flow_size = 0; count = 0; opkt = pkt = NULL; ppei = NULL; txt_data = FALSE; txt_fp = NULL; threshold = 0; #if GRB_TXT_ENABLE thrs = xmalloc(TCP_GRB_THRESHOLD+1); #else thrs = NULL; #endif do { pkt = FlowGetPkt(flow_id); if (pkt != NULL) { ProtGetAttr(pkt->stk, lost_id, &lost); if (lost.uint8 == FALSE) { /* create pei */ PeiNew(&ppei, tcp_grb_id); PeiCapTime(ppei, pkt->cap_sec); PeiMarker(ppei, pkt->serial); PeiStackFlow(ppei, tcp); cap_sec = pkt->cap_sec; end_cap = pkt->cap_sec; break; } else { first_lost = TRUE; } } } while (pkt != NULL); while (pkt != NULL) { flow_size += pkt->len; //ProtStackFrmDisp(pkt->stk, TRUE); ProtGetAttr(pkt->stk, lost_id, &lost); if (lost.uint8 == FALSE) { count++; end_cap = pkt->cap_sec; /* protocol type -ndpi- */ if (stage != 4 && (l7prot_type == NULL || l7prot_id.master_protocol == NDPI_PROTOCOL_HTTP) && l7flow != NULL) { if (TcpGrbClientPkt(priv, pkt)) { l7prot_id = nDPIPacket(pkt, l7flow, l7src, l7dst, ipv4); } else { l7prot_id = nDPIPacket(pkt, l7flow, l7dst, l7src, ipv4); } if (l7prot_id.protocol != NDPI_PROTOCOL_UNKNOWN) { stage++; l7prot_type = ndpi_protocol2name(ndpi, l7prot_id, buff, TCP_CFG_LINE_MAX_SIZE); } } #ifdef XPL_CHECK_CODE if (pkt->raw_len != 0 && ((pkt->raw + pkt->raw_len) < pkt->data)) { LogPrintf(LV_OOPS, "TCP data location error %p %p %lu %lu", pkt->raw, pkt->data, pkt->raw_len, pkt->len); ProtStackFrmDisp(pkt->stk, TRUE); exit(-1); } if (pkt->raw_len != 0 && (pkt->data + pkt->len) > (pkt->raw + pkt->raw_len)) { LogPrintf(LV_OOPS, "TCP data dim error %p %p %lu %lu", pkt->raw, pkt->data, pkt->raw_len, pkt->len); ProtStackFrmDisp(pkt->stk, TRUE); exit(-1); } #endif #if GRB_FILE pckt_header.caplen = pkt->raw_len; pckt_header.len = pkt->raw_len; pckt_header.tv_sec = pkt->cap_sec; pckt_header.tv_usec = pkt->cap_usec; if (fd_pcap != -1) { write(fd_pcap, (char *)&pckt_header, sizeof(struct pcappkt_hdr)); write(fd_pcap, (char *)pkt->raw, pkt->raw_len); } #endif } else { #if GRB_FILE || GRB_CHECK_LOST LogPrintf(LV_WARNING, "Packet Lost (size:%lu)", pkt->len); ProtStackFrmDisp(pkt->stk, TRUE); #endif } if (thrs != NULL) { /* check stream to find text */ if (lost.uint8 == FALSE && pkt->len != 0) { if (threshold + pkt->len >= TCP_GRB_THRESHOLD) { if (txt_data == FALSE) { /* text flow */ txt_data = TcpGrbMajorityText(thrs, threshold); if (txt_data == FALSE) { xfree(thrs); thrs = NULL; threshold = 0; } else { sprintf(txt_file, "%s/%s/tcp_grb_%lu_%p_%i.txt", ProtTmpDir(), TCP_GRB_TMP_DIR, time(NULL), txt_file, incr++); txt_fp = fopen(txt_file, "w"); if (txt_fp != NULL) { TcpGrbText(txt_fp, thrs, threshold); threshold = 0; memcpy(thrs+threshold, pkt->data, pkt->len); threshold += pkt->len; thrs[threshold] = '\0'; } else { LogPrintf(LV_ERROR, "Unable to open file: %s", txt_file); txt_data = FALSE; xfree(thrs); thrs = NULL; threshold = 0; } } } else { TcpGrbText(txt_fp, thrs, threshold); threshold = 0; if (pkt->len > TCP_GRB_THRESHOLD) { TcpGrbText(txt_fp, (unsigned char *)pkt->data, pkt->len); } else { memcpy(thrs+threshold, pkt->data, pkt->len); threshold += pkt->len; } thrs[threshold] = '\0'; } } else { memcpy(thrs+threshold, pkt->data, pkt->len); threshold += pkt->len; thrs[threshold] = '\0'; } } } /* dig */ if (dig_srch_a != NULL && pkt->len != 0) { if (TcpGrbClientPkt(priv, pkt)) { dig_srch = dig_srch_a; dig_x = &dig_s; } else { dig_srch = dig_srch_b; dig_x = &dig_d; } for (i=0; i!=dig_type_dim; i++) { #if 0 if (*dig_x != -1 && *dig_x != dig_srch[i].dig_sync) continue; #endif bool nmatch = FALSE; do { if (dig_srch[i].head == FALSE) { if (lost.uint8 == FALSE && (nmatch == TRUE || TcpGrbDigMatchStart(&(dig_srch[i]), pkt) == 1)) { nmatch = FALSE; *dig_x = i; dig_srch[i].head = TRUE; dig_srch[i].dig_sync = i; dig_srch[i].start_cap = pkt->cap_sec; dig_srch[i].serial = pkt->serial; j = 0; k = dig_srch[i].ft->end_id[0]; while (k != -1) { dig_srch[k].head = TRUE; dig_srch[k].dig_sync = i; j++; k = dig_srch[i].ft->end_id[j]; } /* save file */ sprintf(dig_srch[i].filename, "%s/%s/file_%lu%i.%s", ProtTmpDir(), TCP_GRB_TMP_DIR, time(NULL), incr_dig++, dig_srch[i].ft->ename); LogPrintf(LV_DEBUG, "File %s found (%s)", dig_srch[i].ft->ename, dig_srch[i].filename); dig_srch[i].fp = fopen(dig_srch[i].filename, "wb"); if (dig_srch[i].fp != NULL) { if (pkt == dig_srch[i].pkt) { //ProtStackFrmDisp(pkt->stk, TRUE); dig_srch[i].fsize = pkt->len - dig_srch[i].pkt_offset; fwrite(pkt->data + dig_srch[i].pkt_offset, 1, dig_srch[i].fsize, dig_srch[i].fp); } else { if (opkt == dig_srch[i].pkt) { //ProtStackFrmDisp(pkt->stk, TRUE); dig_srch[i].fsize = opkt->len - dig_srch[i].pkt_offset; fwrite(opkt->data + dig_srch[i].pkt_offset, 1, dig_srch[i].fsize, dig_srch[i].fp); } else { LogPrintf(LV_ERROR, "Improve dig code"); } fwrite(pkt->data, 1, pkt->len, dig_srch[i].fp); dig_srch[i].fsize = pkt->len; } } dig_srch[i].pkt_offset = 0; dig_srch[i].pkt = NULL; } } else { dig_end = FALSE; if (lost.uint8 == FALSE) { if (dig_srch[i].ft->elen != 0) { if (TcpGrbDigMatchEnd(&(dig_srch[i]), pkt) == 1) { ProtStackFrmDisp(pkt->stk, TRUE); dig_end = TRUE; k = dig_srch[i].dig_sync; dig_srch[k].fsize += dig_srch[i].pkt_offset + 1; if (dig_srch[k].fp != NULL) { fwrite(pkt->data, 1, dig_srch[i].pkt_offset + 1, dig_srch[k].fp); fclose(dig_srch[k].fp); } dig_srch[i].pkt_offset = 0; dig_srch[i].pkt = NULL; } if (dig_srch[i].ft->stend == TRUE) { if (TcpGrbDigMatchStart(&(dig_srch[i]), pkt) == 1) { dig_end = TRUE; nmatch = TRUE; k = dig_srch[i].dig_sync; dig_srch[k].fsize += dig_srch[i].pkt_offset; if (dig_srch[k].fp != NULL) { fwrite(pkt->data, 1, dig_srch[i].pkt_offset, dig_srch[k].fp); fclose(dig_srch[k].fp); } } } } if (dig_end == FALSE) { if (dig_srch[i].fsize + pkt->len >= dig_srch[i].ft->msize) { dig_end = TRUE; k = dig_srch[i].dig_sync; if (dig_srch[k].fp != NULL) { if (lost.uint8 == FALSE) fwrite(pkt->data, 1, dig_srch[i].ft->msize - dig_srch[i].fsize, dig_srch[k].fp); fclose(dig_srch[k].fp); dig_srch[k].fsize = dig_srch[i].ft->msize; } } } if (dig_end == TRUE) { dig_srch[i].head = FALSE; *dig_x = -1; j = 0; k = dig_srch[i].ft->end_id[0]; while (k != -1) { dig_srch[k].head = FALSE; if (k != i) { dig_srch[k].fs = 0; dig_srch[k].dig_sync = -1; } j++; k = dig_srch[i].ft->end_id[j]; } k = dig_srch[i].dig_sync; dig_srch[i].fs = 0; dig_srch[i].dig_sync = -1; LogPrintf(LV_DEBUG, "End file %s (%s)", dig_srch[i].ft->ename, dig_srch[k].filename); dig_srch[k].end_cap = pkt->cap_sec; GrbDigPei(&dig_srch[k], tcp); dig_srch[k].fsize = 0; dig_srch[k].fp = NULL; dig_srch[k].filename[0] = '\0'; } else if (i == dig_srch[i].dig_sync) { dig_srch[i].fsize += pkt->len; if (dig_srch[i].fp != NULL) { if (lost.uint8 == FALSE) fwrite(pkt->data, 1, pkt->len, dig_srch[i].fp); else { char *zero; zero = xmalloc(pkt->len); if (zero != NULL) { memset(zero, 0, pkt->len); fwrite(zero, 1, pkt->len, dig_srch[i].fp); xfree(zero); } } } } } } } while(nmatch == TRUE); } } if (opkt != NULL) PktFree(opkt); opkt = pkt; pkt = FlowGetPkt(flow_id); } if (opkt != NULL) { PktFree(opkt); opkt = NULL; } /* text flows */ if (thrs != NULL) { if (txt_data == FALSE) { /* text flow */ if (TcpGrbMajorityText(thrs, threshold) == TRUE) { sprintf(txt_file, "%s/%s/tcp_grb_%lu_%p_%i.txt", ProtTmpDir(), TCP_GRB_TMP_DIR, time(NULL), txt_file, incr++); txt_fp = fopen(txt_file, "w"); } } if (txt_fp != NULL) { TcpGrbText(txt_fp, thrs, threshold); } xfree(thrs); } /* ndpi free */ if (l7flow != NULL) { xfree(l7flow); xfree(l7src); xfree(l7dst); } if (l7prot_type == NULL) l7prot_type = "Unknown"; /* dig flow */ for (i=0; i!=dig_type_dim; i++) { if (dig_srch_a[i].head == TRUE) { if (i == dig_srch_a[i].dig_sync) { if (dig_srch_a[i].fp != NULL) fclose(dig_srch_a[i].fp); LogPrintf(LV_DEBUG, "End stream of file %s", dig_srch_a[i].ft->ename); dig_srch_a[i].end_cap = end_cap; GrbDigPei(&dig_srch_a[i], tcp); dig_srch_a[i].fsize = 0; dig_srch_a[i].fp = NULL; dig_srch_a[i].filename[0] = '\0'; } } if (dig_srch_b[i].head == TRUE) { if (i == dig_srch_b[i].dig_sync) { if (dig_srch_b[i].fp != NULL) fclose(dig_srch_b[i].fp); LogPrintf(LV_DEBUG, "End stream of file %s", dig_srch_b[i].ft->ename); dig_srch_b[i].end_cap = end_cap; GrbDigPei(&dig_srch_b[i], tcp); dig_srch_b[i].fsize = 0; dig_srch_b[i].fp = NULL; dig_srch_b[i].filename[0] = '\0'; } } } /* tcp reset */ if (first_lost && (count < 5 || flow_size == 0)) { if (txt_fp != NULL) { fclose(txt_fp); remove(txt_file); txt_fp = NULL; } } else { if (txt_fp != NULL) { fclose(txt_fp); /* insert data */ GrbPei(ppei, l7prot_type, flow_size, txt_file, &cap_sec, &end_cap); /* insert pei */ PeiIns(ppei); } else { /* insert data */ GrbPei(ppei, l7prot_type, flow_size, NULL, &cap_sec, &end_cap); /* insert pei */ PeiIns(ppei); } } /* end */ #if GRB_FILE if (fd_pcap != -1) close(fd_pcap); #endif if (dig_srch_a != NULL) { xfree(dig_srch_a); xfree(dig_srch_b); } DMemFree(priv); LogPrintf(LV_DEBUG, "TCP->%s garbage... bye bye fid:%d count:%i", l7prot_type, flow_id, count); return NULL; }