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Call pcap_set_immediate_mode to get results back immediately.

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dmiller
2018-08-21 04:51:33 +00:00
parent 7f1485f56d
commit d6a04c465e
5 changed files with 70 additions and 42 deletions
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6
libnetutil/netutil.cc
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@@ -4127,6 +4127,9 @@ pcap_t *my_pcap_open_live(const char *device, int snaplen, int promisc, int to_m
MY_PCAP_SET(pcap_set_snaplen, pt, snaplen);
MY_PCAP_SET(pcap_set_promisc, pt, promisc);
MY_PCAP_SET(pcap_set_timeout, pt, to_ms);
#ifdef HAVE_PCAP_SET_IMMEDIATE_MODE
MY_PCAP_SET(pcap_set_immediate_mode, pt, 1);
#endif
failed = pcap_activate(pt);
if (failed < 0) {
@@ -4147,6 +4150,9 @@ pcap_t *my_pcap_open_live(const char *device, int snaplen, int promisc, int to_m
}
CloseHandle(pcapMutex);
/* We want any responses back ASAP */
/* This is unnecessary with Npcap since libpcap calls PacketSetMinToCopy(0)
* based on immediate mode. Have not determined if it is needed for WinPcap
* or not, but it's not hurting anything. */
pcap_setmintocopy(pt, 1);
#endif