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| author |   Laurent Ghigonis <laurent@p1sec.com> | 2013-06-05 13:05:52 +0200 |
|---|---|---|
| committer | Laurent Ghigonis <laurent@p1sec.com> | 2013-06-05 13:05:52 +0200 |
| commit | 96dca2aca065b1e60be88d2b7c553f7769df4e5e (patch) | |
| tree | 94a71909b9cc4be5c6610a0eff78df34455e129e /gg_sniff/pcap.c | |
| parent | gg_sniff: update README to match reality and talk about filters (diff) | |
| download | glouglou-96dca2aca065b1e60be88d2b7c553f7769df4e5e.tar.xz glouglou-96dca2aca065b1e60be88d2b7c553f7769df4e5e.zip | |
gg_sniff: add -f <libpcap filter>
Diffstat (limited to '')
| -rw-r--r-- | gg_sniff/pcap.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/gg_sniff/pcap.c b/gg_sniff/pcap.c index 72b9133..ac27b33 100644 --- a/gg_sniff/pcap.c +++ b/gg_sniff/pcap.c @@ -98,7 +98,7 @@ static struct _cap_t _cap; int ggsniff_pcap_init(struct event_base *ev_base, struct gg_client *ggcli, - struct ggnet *net, char *iface, int active) + struct ggnet *net, char *iface, int active, char *filter) { char errbuf[PCAP_ERRBUF_SIZE]; struct bpf_program bprog; @@ -114,9 +114,11 @@ ggsniff_pcap_init(struct event_base *ev_base, struct gg_client *ggcli, err(1, "capture: pcap_open_live failed on interface %s\n" "with snaplen %d : %s", iface, PCAP_SNAPLEN, errbuf); - if (pcap_compile(pcap, &bprog, PCAP_FILTER, 0, 0) < 0) + if (!filter) + filter = strndup(PCAP_FILTER, 256); + if (pcap_compile(pcap, &bprog, filter, 0, 0) < 0) err(1, "capture: pcap_compile failed with filter %s : %s", - PCAP_FILTER, pcap_geterr(pcap)); + filter, pcap_geterr(pcap)); if (pcap_setfilter(pcap, &bprog) < 0) err(1, "capture: pcap_setfilter failed : %s", pcap_geterr(pcap)); |