Module: kamailio Branch: master Commit: 570db71b3d9fe3125d1a3da9c3bcc983c812d92d URL: https://github.com/kamailio/kamailio/commit/570db71b3d9fe3125d1a3da9c3bcc983...

Author: Daniel-Constantin Mierla miconda@gmail.com Committer: Daniel-Constantin Mierla miconda@gmail.com Date: 2020-07-16T14:00:09+02:00

sipdump: insert P-KSR-SIPDump header if SIPDUMP_MODE_WPCAPEX flag is set

- inserted header contains sip message specific meta data (transport, pid, proc no)

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Modified: src/modules/sipdump/sipdump_pcap.c

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Diff: https://github.com/kamailio/kamailio/commit/570db71b3d9fe3125d1a3da9c3bcc983... Patch: https://github.com/kamailio/kamailio/commit/570db71b3d9fe3125d1a3da9c3bcc983...

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diff --git a/src/modules/sipdump/sipdump_pcap.c b/src/modules/sipdump/sipdump_pcap.c index a897d302aa..1a559cea59 100644 --- a/src/modules/sipdump/sipdump_pcap.c +++ b/src/modules/sipdump/sipdump_pcap.c @@ -28,6 +28,8 @@

#include "sipdump_write.h"

+extern int sipdump_mode; + /* structures related to PCAP headers imported from open source Asterisk project * fuction to write to PCAP file adapted for internal structures * source: res_pjsip_logger.c - License GPLv2 - Copyright (C) Digium, Inc.*/ @@ -113,8 +115,15 @@ void sipdump_init_pcap(FILE *fs) } }

+static char *_sipdump_pcap_data_buf = NULL; + void sipdump_write_pcap(FILE *fs, sipdump_data_t *spd) { + str data = str_init(""); + str mval = str_init(""); + str sproto = str_init("none"); + char *p = NULL; + struct pcap_record_header v_pcap_record_header = { .ts_sec = spd->tv.tv_sec, .ts_usec = spd->tv.tv_usec, @@ -139,10 +148,40 @@ void sipdump_write_pcap(FILE *fs, sipdump_data_t *spd) return; }

+ data = spd->data; + if((sipdump_mode & SIPDUMP_MODE_WPCAPEX) && (spd->data.len < BUF_SIZE - 256)) { + if(_sipdump_pcap_data_buf == NULL) { + _sipdump_pcap_data_buf = (char*)malloc(BUF_SIZE); + } + if(_sipdump_pcap_data_buf != NULL) { + data.s = _sipdump_pcap_data_buf; + data.len = 0; + mval.s = q_memchr(spd->data.s, '\n', spd->data.len); + p = data.s; + if(mval.s != NULL) { + data.len = mval.s - spd->data.s + 1; + memcpy(p, spd->data.s, data.len); + p += data.len; + get_valid_proto_string(spd->protoid, 0, 0, &sproto); + mval.len = snprintf(p, BUF_SIZE - (data.len + 1), + "P-KSR-SIPDump: %.*s pid=%d pno=%d\r\n", + sproto.len, sproto.s, spd->pid, spd->procno); + if(mval.len < 0 || mval.len >= BUF_SIZE - (data.len + 1)) { + data = spd->data; + } else { + data.len += mval.len; + p += mval.len; + mval.s += 1; + memcpy(p, mval.s, spd->data.s + spd->data.len - mval.s); + data.len += spd->data.s + spd->data.len - mval.s; + } + } + } + } /* always store UDP */ v_pcap_udp_header.src = ntohs(spd->src_port); v_pcap_udp_header.dst = ntohs(spd->dst_port); - v_pcap_udp_header.length = ntohs(sizeof(struct pcap_udp_header) + spd->data.len); + v_pcap_udp_header.length = ntohs(sizeof(struct pcap_udp_header) + data.len);

/* IP header */ if (spd->afid == AF_INET6) { @@ -161,7 +200,7 @@ void sipdump_write_pcap(FILE *fs, sipdump_data_t *spd) } memcpy(&v_pcap_ipv6_header.ip6_dst, &ip6addr, sizeof(struct in6_addr)); v_pcap_ipv6_header.ip6_ctlun.ip6_un1.ip6_un1_plen = htons(sizeof(struct pcap_udp_header) - + spd->data.len); + + data.len); v_pcap_ipv6_header.ip6_ctlun.ip6_un1.ip6_un1_nxt = IPPROTO_UDP; } else { LM_DBG("ipv4 = %s -> %s\n", spd->src_ip.s, spd->dst_ip.s); @@ -179,13 +218,13 @@ void sipdump_write_pcap(FILE *fs, sipdump_data_t *spd) } memcpy(&v_pcap_ipv4_header.ip_dst, &ip4addr, sizeof(uint32_t)); v_pcap_ipv4_header.ip_len = htons(sizeof(struct pcap_udp_header) - + sizeof(struct pcap_ipv4_header) + spd->data.len); + + sizeof(struct pcap_ipv4_header) + data.len); v_pcap_ipv4_header.ip_protocol = IPPROTO_UDP; /* UDP */ }

/* add up all the sizes for this record */ v_pcap_record_header.orig_len = sizeof(struct pcap_ethernet_header) + pcap_ip_header_len - + sizeof(struct pcap_udp_header) + spd->data.len; + + sizeof(struct pcap_udp_header) + data.len; v_pcap_record_header.incl_len = v_pcap_record_header.orig_len;

if (fwrite(&v_pcap_record_header, sizeof(struct pcap_record_header), 1, fs) != 1) { @@ -200,7 +239,7 @@ void sipdump_write_pcap(FILE *fs, sipdump_data_t *spd) if (fwrite(&v_pcap_udp_header, sizeof(struct pcap_udp_header), 1, fs) != 1) { LM_ERR("writing UDP header to pcap failed: %s\n", strerror(errno)); } - if (fwrite(spd->data.s, spd->data.len, 1, fs) != 1) { + if (fwrite(data.s, data.len, 1, fs) != 1) { LM_ERR("writing UDP payload to pcap failed: %s\n", strerror(errno)); } fflush(fs);