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sipgrep.c
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sipgrep.c
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/*
* sipgrep - Monitoring tools
*
* Author: Alexandr Dubovikov <[email protected]>
* (C) Homer Project 2014 (http://www.sipcapture.org)
*
* Sipgrep 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 3 of the License, or
* (at your option) any later version
*
* Sipgrep 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
*
* base on NGREP of:
*
* Copyright (c) 2006 Jordan Ritter <[email protected]>
*
*/
#if defined(BSD) || defined(SOLARIS) || defined(MACOSX)
#include <unistd.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <sys/tty.h>
#include <pwd.h>
#endif
#if defined(OSF1)
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <net/route.h>
#include <sys/mbuf.h>
#include <arpa/inet.h>
#include <unistd>
#include <pwd.h>
#endif
#if defined(LINUX)
#include <getopt.h>
#include <arpa/inet.h>
#include <sys/stat.h>
#include <ctype.h>
#include <time.h>
#include <unistd.h>
#include <pwd.h>
#include <grp.h>
#endif
#if defined(AIX)
#include <sys/machine.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <time.h>
#include <unistd.h>
#include <pwd.h>
#endif
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <netinet/ip_icmp.h>
#include <netinet/igmp.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <pcap.h>
#include <netdb.h>
/* reasambling */
#include "ipreasm.h"
/* hash table */
#include "uthash.h"
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if USE_IPv6
#include <netinet/ip6.h>
#include <netinet/icmp6.h>
#endif
#include <pcre.h>
#include "core_hep.h"
#include "sipgrep.h"
#include "sipparse.h"
/*
* Configuration Options
*/
uint16_t snaplen = 65535, limitlen = 65535, promisc = 1, to = 100;
uint16_t match_after = 0, keep_matching = 0, matches = 0, max_matches = 0;
uint8_t re_match_word = 0, re_ignore_case = 0, re_multiline_match = 1;
uint8_t show_empty = 0, show_proto = 0, quiet = 1;
uint8_t invert_match = 0;
uint8_t live_read = 1, want_delay = 0;
uint8_t dont_dropprivs = 0, ignore_bad_sip = 0;
char *read_file = NULL, *dump_file = NULL;
char *usedev = NULL;
char nonprint_char = '.';
struct callid_table *dialogs = NULL;
struct callid_remove *dialogs_remove = NULL;
/*
* GNU PCRE
*/
int32_t err_offset;
char *re_err = NULL;
pcre *pattern = NULL;
pcre_extra *pattern_extra = NULL;
/*
* Matching
*/
char *match_data = NULL, *bin_data = NULL;
uint16_t match_len = 0;
int8_t (*match_func)() = &blank_match_func;
int8_t dump_single = 0;
void (*dump_func)(unsigned char *, uint32_t) = &dump_byline;
/*
* BPF/Network
*/
char *filter = NULL, *filter_file = NULL, *portrange = "5060-5061";
char pc_err[PCAP_ERRBUF_SIZE];
uint8_t link_offset;
uint8_t radiotap_present = 0;
pcap_t *pd = NULL;
pcap_dumper_t *pd_dump = NULL;
struct bpf_program pcapfilter;
struct in_addr net, mask;
int file_counter = 0;
/*
* Timestamp/delay functionality
*/
struct timeval prev_ts = {0, 0}, prev_delay_ts = {0,0};
void (*print_time)() = NULL, (*dump_delay)() = dump_delay_proc_init;
uint32_t ws_row, ws_col = 80, ws_col_forced = 0;
/* ip reasm */
int8_t reasm_enable = 1;
struct reasm_ip *reasm = NULL;
char *sip_from_filter = NULL, *sip_to_filter = NULL, *sip_contact_filter = NULL;
char *custom_filter = NULL, *homer_capture_url = NULL;
/* default dialog match */
uint8_t dialog_match = 1;
uint8_t use_color = 1, enable_dialog_remove = 1, print_report = 0, kill_friendlyscanner = 0;
/* homer socket */
int homer_sock = 0, use_homer = 0;
/* kill time */
unsigned int stop_working_value = 0, write_deadline = 0, stop_working_type = 0, split_file_value = 0, split_file_type = 0;
/* time to remove */
unsigned int time_dialog_remove = 0;
/* start time */
unsigned int start_time = 0;
/* default friendly scanner UAC */
char *friendly_scanner_uac = "friendly-scanner";
char *friendly_scanner_range;
int main(int argc, char **argv) {
int32_t c;
signal(SIGINT, clean_exit);
signal(SIGABRT, clean_exit);
/* default timestamp */
print_time = &print_time_absolute;
while ((c = getopt(argc, argv, "axNhCXViwmpevlDTRMGJgs:n:c:q:H:d:A:I:O:S:F:P:f:t:j:K:Q:")) != EOF) {
switch (c) {
case 'x':
ignore_bad_sip = 1;
break;
case 'F':
filter_file = optarg;
break;
case 'S':
limitlen = atoi(optarg);
break;
case 'a':
reasm_enable = 0;
break;
case 'q':
if(parse_stop_request(optarg) != 0) {
usage(-1);
exit(1);
}
break;
case 'Q':
if(parse_split_request(optarg) != 0) {
usage(-1);
exit(1);
}
/* we should keep our priv. to rotate files */
dont_dropprivs = 1;
break;
case 'J':
kill_friendlyscanner = 1;
break;
case 'K':
friendly_scanner_range = optarg;
kill_friendlyscanner = 2;
break;
case 'j':
friendly_scanner_uac = optarg;
kill_friendlyscanner = 1;
break;
case 'g':
enable_dialog_remove = 0;
break;
case 'G':
print_report = 1;
break;
case 'O':
dump_file = optarg;
break;
case 'P':
portrange = optarg;
break;
case 'I':
read_file = optarg;
break;
case 'A':
match_after = atoi(optarg) + 1;
break;
case 'd':
usedev = optarg;
break;
case 't':
sip_to_filter = optarg;
re_multiline_match = 0;
break;
case 'f':
sip_from_filter = optarg;
re_multiline_match = 0;
break;
case 'c':
sip_contact_filter = optarg;
re_multiline_match = 0;
break;
case 'H':
homer_capture_url = optarg;
use_homer = 1;
break;
case 'n':
max_matches = atoi(optarg);
break;
case 'm':
dialog_match = 0;
break;
case 'C':
use_color = 0;
break;
case 's': {
uint16_t value = atoi(optarg);
if (value > 0)
snaplen = value;
} break;
case 'M':
re_multiline_match = 0;
break;
case 'R':
dont_dropprivs = 1;
break;
case 'T':
print_time = &print_time_diff;
gettimeofday(&prev_ts, NULL);
break;
case 'D':
want_delay = 1;
break;
case 'l':
setvbuf(stdout, NULL, _IOLBF, 0);
break;
case 'v':
invert_match++;
break;
case 'e':
show_empty++;
break;
case 'p':
promisc = 0;
break;
case 'w':
re_match_word++;
break;
case 'i':
re_ignore_case++;
break;
case 'V':
version();
break;
case 'N':
show_proto++;
break;
case 'h':
usage(0);
break;
default:
usage(-1);
}
}
start_time = (unsigned)time(NULL);
/* make kill range */
if(kill_friendlyscanner == 2) {
mass_friendlyscanner_kill(friendly_scanner_range);
clean_exit(-1);
}
/* missed -O flag for -q filessize or SPLIT FILE types */
if((stop_working_type == FILESIZE_SPLIT || split_file_type != 0) && !dump_file) {
fprintf(stderr, "-O parameter missed\n");
usage(-1);
exit(1);
}
if(use_homer) {
if(!homer_capture_url || make_homer_socket(homer_capture_url)) {
fprintf(stderr, "bad homer url\n");
usage(-1);
exit(1);
}
}
if (argv[optind])
match_data = argv[optind++];
if (read_file) {
if (!(pd = pcap_open_offline(read_file, pc_err))) {
perror(pc_err);
clean_exit(-1);
}
live_read = 0;
printf("input: %s\n", read_file);
} else {
char *dev = usedev ? usedev : pcap_lookupdev(pc_err);
if (!dev) {
perror(pc_err);
clean_exit(-1);
}
if ((pd = pcap_open_live(dev, snaplen, promisc, to, pc_err)) == NULL) {
perror(pc_err);
clean_exit(-1);
}
if (pcap_lookupnet(dev, &net.s_addr, &mask.s_addr, pc_err) == -1) {
perror(pc_err);
memset(&net, 0, sizeof(net));
memset(&mask, 0, sizeof(mask));
}
if (quiet < 2) {
printf("interface: %s", dev);
if (net.s_addr && mask.s_addr) {
printf(" (%s/", inet_ntoa(net));
printf("%s)", inet_ntoa(mask));
}
printf("\n");
}
}
if (filter_file) {
char buf[1024] = {0};
FILE *f = fopen(filter_file, "r");
if (!f || !fgets(buf, sizeof(buf)-1, f)) {
fprintf(stderr, "fatal: unable to get filter from %s: %s\n", filter_file, strerror(errno));
usage(-1);
}
fclose(f);
filter = get_filter_from_string(buf);
if (pcap_compile(pd, &pcapfilter, filter, 0, mask.s_addr)) {
pcap_perror(pd, "pcap compile");
clean_exit(-1);
}
} else if (argv[optind]) {
filter = get_filter_from_argv(&argv[optind]);
if (pcap_compile(pd, &pcapfilter, filter, 0, mask.s_addr)) {
free(filter);
filter = get_filter_from_argv(&argv[optind-1]);
if (pcap_compile(pd, &pcapfilter, filter, 0, mask.s_addr)) {
pcap_perror(pd, "pcap compile");
clean_exit(-1);
} else match_data = NULL;
}
} else {
//char *default_filter = BPF_FILTER_IP;
filter = get_filter_from_portrange(portrange);
if (pcap_compile(pd, &pcapfilter, filter, 0, mask.s_addr)) {
pcap_perror(pd, "pcap compile");
clean_exit(-1);
}
}
/* custom filter */
if(sip_to_filter && sip_from_filter) {
custom_filter = malloc(strlen(sip_to_filter) + strlen(sip_from_filter) + strlen(SIP_FROM_TO_MATCH));
sprintf(custom_filter, SIP_FROM_TO_MATCH, sip_from_filter, sip_to_filter);
match_data = custom_filter;
}
else if(sip_from_filter) {
custom_filter = malloc(strlen(sip_from_filter) + strlen(SIP_FROM_MATCH));
sprintf(custom_filter, SIP_FROM_MATCH, sip_from_filter);
match_data = custom_filter;
}
else if(sip_to_filter) {
custom_filter = malloc(strlen(sip_to_filter) + strlen(SIP_TO_MATCH));
sprintf(custom_filter, SIP_TO_MATCH, sip_to_filter);
match_data = custom_filter;
}
if (filter && quiet < 2)
printf("filter: %s\n", filter);
if (pcap_setfilter(pd, &pcapfilter)) {
pcap_perror(pd, "pcap set");
clean_exit(-1);
}
if (match_data) {
uint32_t pcre_options = PCRE_UNGREEDY;
if (re_ignore_case)
pcre_options |= PCRE_CASELESS;
if (re_multiline_match)
pcre_options |= PCRE_DOTALL;
if (re_match_word) {
char *word_regex = malloc(strlen(match_data) * 3 + strlen(WORD_REGEX));
sprintf(word_regex, WORD_REGEX, match_data, match_data, match_data);
match_data = word_regex;
}
pattern = pcre_compile(match_data, pcre_options, (const char **)&re_err, &err_offset, 0);
if (!pattern) {
fprintf(stderr, "compile failed: %s\n", re_err);
clean_exit(-1);
}
pattern_extra = pcre_study(pattern, 0, (const char **)&re_err);
match_func = &re_match_func;
if (quiet < 2 && match_data && strlen(match_data))
printf("%smatch: %s%s\n", invert_match?"don't ":"",
(bin_data && !strchr(match_data, 'x'))?"0x":"", match_data);
}
if (filter) free(filter);
if (re_match_word) free(match_data);
if (custom_filter) free(custom_filter);
switch(pcap_datalink(pd)) {
case DLT_EN10MB:
link_offset = ETHHDR_SIZE;
break;
case DLT_IEEE802:
link_offset = TOKENRING_SIZE;
break;
case DLT_FDDI:
link_offset = FDDIHDR_SIZE;
break;
case DLT_SLIP:
link_offset = SLIPHDR_SIZE;
break;
case DLT_PPP:
link_offset = PPPHDR_SIZE;
break;
#if HAVE_DLT_LOOP
case DLT_LOOP:
#endif
case DLT_NULL:
link_offset = LOOPHDR_SIZE;
break;
#if HAVE_DLT_RAW
case DLT_RAW:
link_offset = RAWHDR_SIZE;
break;
#endif
#if HAVE_DLT_LINUX_SLL
case DLT_LINUX_SLL:
link_offset = ISDNHDR_SIZE;
break;
#endif
#if HAVE_DLT_IEEE802_11_RADIO
case DLT_IEEE802_11_RADIO:
radiotap_present = 1;
#endif
#if HAVE_DLT_IEEE802_11
case DLT_IEEE802_11:
link_offset = IEEE80211HDR_SIZE;
break;
#endif
default:
fprintf(stderr, "fatal: unsupported interface type %u\n", pcap_datalink(pd));
clean_exit(-1);
}
if (dump_file) {
if (!(pd_dump = pcap_dump_open(pd, dump_file))) {
fprintf(stderr, "fatal: %s\n", pcap_geterr(pd));
clean_exit(-1);
} else printf("output: %s\n", dump_file);
}
update_windowsize(0);
#if USE_DROPPRIVS
drop_privs();
#endif
/* REASM */
if(reasm_enable) {
reasm = reasm_ip_new ();
reasm_ip_set_timeout (reasm, 30000000);
}
while (pcap_loop(pd, 0, (pcap_handler)process, 0));
clean_exit(0);
/* NOT REACHED */
return 0;
}
void create_dump(unsigned int now) {
struct tm *t;
char file_ts[256];
char *file_ext = NULL;
unsigned int len = 0;
if(!dump_file) return;
if(check_split_deadline(now) == 0) {
/* do close and create a new one*/
if (pd_dump) {
pcap_dump_flush(pd_dump);
pcap_dump_close(pd_dump);
}
else {
fprintf(stderr, "fatal: file not opened\n");
clean_exit(-1);
}
/* set counter */
file_counter++;
time_t epoch_time_as_time_t = write_deadline;
t = localtime(&epoch_time_as_time_t);
len = strlen(dump_file);
if((file_ext = strrchr(dump_file, '.'))) {
if(file_ext == dump_file) file_ext = NULL;
else len -= strlen(file_ext);
}
snprintf(file_ts, 256, "%.*s_%06d_%02u%02u%02u%02u%02u%02u%s",
len, dump_file, file_counter, t->tm_year+1900, t->tm_mon+1, t->tm_mday, t->tm_hour,
t->tm_min, t->tm_sec, file_ext ? file_ext : ".pcap");
if((len = rename(dump_file, file_ts)) != 0) {
fprintf(stderr, "unable to rename the file '%s' to '%s' %d\n", dump_file, file_ts, len);
}
if (!(pd_dump = pcap_dump_open(pd, dump_file))) {
fprintf(stderr, "fatal: %s\n", pcap_geterr(pd));
clean_exit(-1);
} else printf("output: %s\n", dump_file);
}
}
void process(u_char *d, struct pcap_pkthdr *h, u_char *p) {
struct ip *ip4_pkt = (struct ip *) (p + link_offset);
#if USE_IPv6
struct ip6_hdr *ip6_pkt = (struct ip6_hdr*)(p + link_offset);
#endif
uint32_t ip_ver;
uint8_t ip_proto = 0;
uint32_t ip_hl = 0;
uint32_t ip_off = 0;
uint8_t fragmented = 0;
uint16_t frag_offset = 0;
uint32_t frag_id = 0;
char ip_src[INET6_ADDRSTRLEN + 1],
ip_dst[INET6_ADDRSTRLEN + 1];
unsigned char *data;
uint32_t len = h->caplen;
#if HAVE_DLT_IEEE802_11_RADIO
if (radiotap_present) {
uint16_t radio_len = ((struct SIPGREP_rtaphdr_t *)(p))->it_len;
ip4_pkt = (struct ip *)(p + link_offset + radio_len);
len -= radio_len;
}
#endif
u_char *packet = NULL;
if (reasm != NULL) {
unsigned new_len;
u_char *new_p = malloc(len - link_offset - ((ntohs((uint16_t)*(p + 12)) == 0x8100)? 4:0));
memcpy(new_p, ip4_pkt, len - link_offset - ((ntohs((uint16_t)*(p + 12)) == 0x8100)? 4:0));
packet = reasm_ip_next(reasm, new_p, len - link_offset - ((ntohs((uint16_t)*(p + 12)) == 0x8100)? 4:0), (reasm_time_t) 1000000UL * h->ts.tv_sec + h->ts.tv_usec, &new_len);
if (packet == NULL) return;
len = new_len + link_offset + ((ntohs((uint16_t)*(packet + 12)) == 0x8100)? 4:0);
h->len = new_len;
h->caplen = new_len;
ip4_pkt = (struct ip *) packet;
#if USE_IPv6
ip6_pkt = (struct ip6_hdr*)packet;
#endif
}
ip_ver = ip4_pkt->ip_v;
switch (ip_ver) {
case 4: {
#if defined(AIX)
#undef ip_hl
ip_hl = ip4_pkt->ip_ff.ip_fhl * 4;
#else
ip_hl = ip4_pkt->ip_hl * 4;
#endif
ip_proto = ip4_pkt->ip_p;
ip_off = ntohs(ip4_pkt->ip_off);
fragmented = ip_off & (IP_MF | IP_OFFMASK);
frag_offset = (fragmented) ? (ip_off & IP_OFFMASK) * 8 : 0;
frag_id = ntohs(ip4_pkt->ip_id);
inet_ntop(AF_INET, (const void *)&ip4_pkt->ip_src, ip_src, sizeof(ip_src));
inet_ntop(AF_INET, (const void *)&ip4_pkt->ip_dst, ip_dst, sizeof(ip_dst));
} break;
#if USE_IPv6
case 6: {
ip_hl = sizeof(struct ip6_hdr);
ip_proto = ip6_pkt->ip6_nxt;
if (ip_proto == IPPROTO_FRAGMENT) {
struct ip6_frag *ip6_fraghdr;
ip6_fraghdr = (struct ip6_frag *)((unsigned char *)(ip6_pkt) + ip_hl);
ip_hl += sizeof(struct ip6_frag);
ip_proto = ip6_fraghdr->ip6f_nxt;
fragmented = 1;
frag_offset = ntohs(ip6_fraghdr->ip6f_offlg & IP6F_OFF_MASK);
frag_id = ntohl(ip6_fraghdr->ip6f_ident);
}
inet_ntop(AF_INET6, (const void *)&ip6_pkt->ip6_src, ip_src, sizeof(ip_src));
inet_ntop(AF_INET6, (const void *)&ip6_pkt->ip6_dst, ip_dst, sizeof(ip_dst));
} break;
#endif
}
if (quiet < 1) {
printf("#");
fflush(stdout);
}
switch (ip_proto) {
case IPPROTO_TCP: {
struct tcphdr *tcp_pkt = (struct tcphdr *)((unsigned char *)(ip4_pkt) + ip_hl);
uint16_t tcphdr_offset = (frag_offset) ? 0 : (tcp_pkt->th_off * 4);
data = (unsigned char *)(tcp_pkt) + tcphdr_offset;
len -= link_offset + ip_hl + tcphdr_offset;
#if USE_IPv6
if (ip_ver == 6)
len -= ntohs(ip6_pkt->ip6_plen);
#endif
if ((int32_t)len < 0)
len = 0;
dump_packet(h, p, ip_proto, data, len,
ip_src, ip_dst, ntohs(tcp_pkt->th_sport), ntohs(tcp_pkt->th_dport), tcp_pkt->th_flags,
tcphdr_offset, fragmented, frag_offset, frag_id, ip_ver);
} break;
case IPPROTO_UDP: {
struct udphdr *udp_pkt = (struct udphdr *)((unsigned char *)(ip4_pkt) + ip_hl);
uint16_t udphdr_offset = (frag_offset) ? 0 : sizeof(*udp_pkt);
data = (unsigned char *)(udp_pkt) + udphdr_offset;
len -= link_offset + ip_hl + udphdr_offset;
#if USE_IPv6
if (ip_ver == 6)
len -= ntohs(ip6_pkt->ip6_plen);
#endif
if ((int32_t)len < 0)
len = 0;
dump_packet(h, p, ip_proto, data, len, ip_src, ip_dst,
#if HAVE_DUMB_UDPHDR
ntohs(udp_pkt->source), ntohs(udp_pkt->dest), 0,
#else
ntohs(udp_pkt->uh_sport), ntohs(udp_pkt->uh_dport), 0,
#endif
udphdr_offset, fragmented, frag_offset, frag_id, ip_ver);
} break;
case IPPROTO_ICMP: {
struct icmp *icmp4_pkt = (struct icmp *)((unsigned char *)(ip4_pkt) + ip_hl);
uint16_t icmp4hdr_offset = (frag_offset) ? 0 : 4;
data = (unsigned char *)(icmp4_pkt) + icmp4hdr_offset;
len -= link_offset + ip_hl + icmp4hdr_offset;
if ((int32_t)len < 0)
len = 0;
dump_packet(h, p, ip_proto, data, len,
ip_src, ip_dst, icmp4_pkt->icmp_type, icmp4_pkt->icmp_code, 0,
icmp4hdr_offset, fragmented, frag_offset, frag_id, ip_ver);
} break;
#if USE_IPv6
case IPPROTO_ICMPV6: {
struct icmp6_hdr *icmp6_pkt = (struct icmp6_hdr *)((unsigned char *)(ip6_pkt) + ip_hl);
uint16_t icmp6hdr_offset = (frag_offset) ? 0 : 4;
data = (unsigned char *)(icmp6_pkt) + icmp6hdr_offset;
len -= link_offset + ip_hl + ntohs(ip6_pkt->ip6_plen) + icmp6hdr_offset;
if ((int32_t)len < 0)
len = 0;
dump_packet(h, p, ip_proto, data, len,
ip_src, ip_dst, icmp6_pkt->icmp6_type, icmp6_pkt->icmp6_code, 0,
icmp6hdr_offset, fragmented, frag_offset, frag_id, ip_ver);
} break;
#endif
case IPPROTO_IGMP: {
struct igmp *igmp_pkt = (struct igmp *)((unsigned char *)(ip4_pkt) + ip_hl);
uint16_t igmphdr_offset = (frag_offset) ? 0 : 4;
data = (unsigned char *)(igmp_pkt) + igmphdr_offset;
len -= link_offset + ip_hl + igmphdr_offset;
if ((int32_t)len < 0)
len = 0;
dump_packet(h, p, ip_proto, data, len,
ip_src, ip_dst, igmp_pkt->igmp_type, igmp_pkt->igmp_code, 0,
igmphdr_offset, fragmented, frag_offset, frag_id, ip_ver);
} break;
default: {
data = (unsigned char *)(ip4_pkt) + ip_hl;
len -= link_offset + ip_hl;
if ((int32_t)len < 0)
len = 0;
dump_packet(h, p, ip_proto, data, len,
ip_src, ip_dst, 0, 0, 0,
0, fragmented, frag_offset, frag_id, ip_ver);
} break;
}
if(packet != NULL)
free(packet);
if (max_matches && matches >= max_matches)
clean_exit(0);
if (match_after && keep_matching)
keep_matching--;
}
int parse_stop_request(char *request) {
if(!strncmp(request, "duration:", 9)) {
stop_working_type = DURATION_SPLIT;
}
else if(!strncmp(request, "filesize:", 9)) {
stop_working_type = FILESIZE_SPLIT;
}
else goto error;
if((stop_working_value = atoi(request+9)) > 0) return 0;
error:
printf("bad format, should be 'duration:NUM' or 'filesize:NUM'\n");
return -1;
}
int parse_split_request(char *request) {
if(!strncmp(request, "duration:", 9)) {
split_file_type = DURATION_SPLIT;
}
else if(!strncmp(request, "filesize:", 9)) {
split_file_type = FILESIZE_SPLIT;
}
else goto error;
if((split_file_value = atoi(request+9)) > 0) {
write_deadline = split_file_value + (unsigned)time(NULL);
return 0;
}
error:
printf("bad format, should be 'duration:NUM' or 'filesize:NUM'\n");
return -1;
}
int check_split_deadline(unsigned int now) {
struct stat st;
switch(split_file_type) {
case DURATION_SPLIT: {
if(now >= write_deadline) {
//printf("Timeout arrived. make new file...\n");
write_deadline += split_file_value;
return 0;
}
break;
};
case FILESIZE_SPLIT:{
stat(dump_file, &st);
int size = st.st_size;
if(size >= split_file_value*1024) {
//printf("file size is [%d]. split file ...\n", split_file_value);
return 0;
}
break;
};
default:
break;
}
return -1;
}
int check_exit_deadline(unsigned int now) {
struct stat st;
switch(stop_working_type) {
case DURATION_SPLIT: {
if(now >= (stop_working_value + start_time)) {
printf("Timeout arrived. go to exit...\n");
return 0;
}
break;
}
case FILESIZE_SPLIT:{
stat(dump_file, &st);
int size = st.st_size;
if(size >= (stop_working_value*1024)) {
printf("file size is [%d]. go to exit...\n", stop_working_value);
return 0;
}
break;
}
default:
break;
}
return -1;
}
void dump_packet(struct pcap_pkthdr *h, u_char *p, uint8_t proto, unsigned char *data, uint32_t len,
const char *ip_src, const char *ip_dst, uint16_t sport, uint16_t dport, uint8_t flags,
uint16_t hdr_offset, uint8_t frag, uint16_t frag_offset, uint32_t frag_id, uint32_t ip_ver) {
rc_info_t *rcinfo = NULL;
int now = (unsigned) time(NULL);
if(!isalpha(data[0]))
{
return;
}
if(check_exit_deadline(now) == 0) {
clean_exit(0);
return;
}