diff options
| author | YASUOKA Masahiko <yasuoka@cvs.openbsd.org> | 2015-02-08 04:40:51 +0000 |
|---|---|---|
| committer | YASUOKA Masahiko <yasuoka@cvs.openbsd.org> | 2015-02-08 04:40:51 +0000 |
| commit | 250038d786eeb7594fe1d327631930d8e40d9d09 (patch) | |
| tree | 8324beb138db41ace5d86a5d354f41f0b9889215 /sys/netinet | |
| parent | cdda0fb748bdfcc46dd3584806e766d3f073b656 (diff) | |
Count dropped SYN packets on the tcpstat. They are dropped due to the
listen queue (backlog) limit or the memory shortage in syn-cache.
ok henning reyk claudio
Diffstat (limited to 'sys/netinet')
| -rw-r--r-- | sys/netinet/tcp_input.c | 6 | ||||
| -rw-r--r-- | sys/netinet/tcp_var.h | 3 |
2 files changed, 6 insertions, 3 deletions
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index 96712240d07..ba45329f2fa 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -1,4 +1,4 @@ -/* $OpenBSD: tcp_input.c,v 1.286 2014/12/19 17:14:40 tedu Exp $ */ +/* $OpenBSD: tcp_input.c,v 1.287 2015/02/08 04:40:50 yasuoka Exp $ */ /* $NetBSD: tcp_input.c,v 1.23 1996/02/13 23:43:44 christos Exp $ */ /* @@ -853,8 +853,10 @@ findpcb: */ if (so->so_qlen > so->so_qlimit || syn_cache_add(&src.sa, &dst.sa, th, iphlen, - so, m, optp, optlen, &opti, reuse) == -1) + so, m, optp, optlen, &opti, reuse) == -1) { + tcpstat.tcps_dropsyn++; goto drop; + } return; } } diff --git a/sys/netinet/tcp_var.h b/sys/netinet/tcp_var.h index c55c5df6881..3e8ca2bd222 100644 --- a/sys/netinet/tcp_var.h +++ b/sys/netinet/tcp_var.h @@ -1,4 +1,4 @@ -/* $OpenBSD: tcp_var.h,v 1.106 2015/01/21 22:23:52 deraadt Exp $ */ +/* $OpenBSD: tcp_var.h,v 1.107 2015/02/08 04:40:50 yasuoka Exp $ */ /* $NetBSD: tcp_var.h,v 1.17 1996/02/13 23:44:24 christos Exp $ */ /* @@ -408,6 +408,7 @@ struct tcpstat { u_int32_t tcps_pcbhashmiss; /* input packets missing pcb hash */ u_int32_t tcps_noport; /* no socket on port */ u_int32_t tcps_badsyn; /* SYN packet with src==dst rcv'ed */ + u_int32_t tcps_dropsyn; /* SYN packet dropped */ u_int32_t tcps_rcvbadsig; /* rcvd bad/missing TCP signatures */ u_int64_t tcps_rcvgoodsig; /* rcvd good TCP signatures */ |