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Author: Hilko Bengen <bengen@debian.org>
Description: urlsnarf: use timestamps from pcap file if available. Closes: #573365
--- a/urlsnarf.c 2011-06-19 17:15:21.627999373 -0500
+++ b/urlsnarf.c 2011-06-19 17:15:43.411999368 -0500
@@ -36,6 +36,7 @@
u_short Opt_dns = 1;
int Opt_invert = 0;
regex_t *pregex = NULL;
+time_t tt = 0;
static void
usage(void)
@@ -57,9 +58,12 @@ timestamp(void)
{
static char tstr[32], sign;
struct tm *t, gmt;
- time_t tt = time(NULL);
int days, hours, tz, len;
+ if (!nids_params.filename) {
+ tt = time(NULL);
+ }
+
gmt = *gmtime(&tt);
t = localtime(&tt);
@@ -312,9 +316,48 @@ main(int argc, char *argv[])
nids_register_chksum_ctl(&chksum_ctl, 1);
- nids_run();
-
- /* NOTREACHED */
+ pcap_t *p;
+ char pcap_errbuf[PCAP_ERRBUF_SIZE];
+ if (nids_params.filename == NULL) {
+ /* adapted from libnids.c:open_live() */
+ if (strcmp(nids_params.device, "all") == 0)
+ nids_params.device = "any";
+ p = pcap_open_live(nids_params.device, 16384,
+ (nids_params.promisc != 0),
+ 0, pcap_errbuf);
+ if (!p) {
+ fprintf(stderr, "pcap_open_live(): %s\n",
+ pcap_errbuf);
+ exit(1);
+ }
+ }
+ else {
+ p = pcap_open_offline(nids_params.filename,
+ pcap_errbuf);
+ if (!p) {
+ fprintf(stderr, "pcap_open_offline(%s): %s\n",
+ nids_params.filename, pcap_errbuf);
+ }
+ }
+
+ struct pcap_pkthdr *h;
+ u_char *d;
+ int rc;
+ while ((rc = pcap_next_ex(p, &h, &d)) == 1) {
+ tt = h->ts.tv_sec;
+ nids_pcap_handler(NULL, h, d);
+ }
+ switch (rc) {
+ case(-2): /* end of pcap file */
+ case(0): /* timeout on live capture */
+ break;
+ case(-1):
+ default:
+ fprintf(stderr, "rc = %i\n", rc);
+ pcap_perror(p, "pcap_read_ex()");
+ exit(1);
+ break;
+ }
exit(0);
}
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