diff options
| author | Michael Tuexen <tuexen@FreeBSD.org> | 2024-09-05 01:33:13 +0000 |
|---|---|---|
| committer | Michael Tuexen <tuexen@FreeBSD.org> | 2024-09-05 01:33:13 +0000 |
| commit | ef438f7706be48f1cf7fd4c8a60329e1619cfe30 (patch) | |
| tree | f72cbf41c944feb5aefe53a518605c9a6b6bbab5 /sys/netinet/tcp_syncache.c | |
| parent | 7aeec281b8b2620d7d88c9abdfadd7e20a485b9c (diff) | |
Diffstat (limited to 'sys/netinet/tcp_syncache.c')
| -rw-r--r-- | sys/netinet/tcp_syncache.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/sys/netinet/tcp_syncache.c b/sys/netinet/tcp_syncache.c index 33a6a66b7138..d0a7690256f4 100644 --- a/sys/netinet/tcp_syncache.c +++ b/sys/netinet/tcp_syncache.c @@ -527,10 +527,16 @@ syncache_timer(void *xsch) } NET_EPOCH_ENTER(et); - syncache_respond(sc, NULL, TH_SYN|TH_ACK); + if (syncache_respond(sc, NULL, TH_SYN|TH_ACK) == 0) { + syncache_timeout(sc, sch, 0); + TCPSTAT_INC(tcps_sndacks); + TCPSTAT_INC(tcps_sndtotal); + TCPSTAT_INC(tcps_sc_retransmitted); + } else { + syncache_drop(sc, sch); + TCPSTAT_INC(tcps_sc_dropped); + } NET_EPOCH_EXIT(et); - TCPSTAT_INC(tcps_sc_retransmitted); - syncache_timeout(sc, sch, 0); } if (!TAILQ_EMPTY(&(sch)->sch_bucket)) callout_reset(&(sch)->sch_timer, (sch)->sch_nextc - tick, @@ -688,7 +694,13 @@ syncache_chkrst(struct in_conninfo *inc, struct tcphdr *th, struct mbuf *m, "sending challenge ACK\n", s, __func__, th->th_seq, sc->sc_irs + 1, sc->sc_wnd); - syncache_respond(sc, m, TH_ACK); + if (syncache_respond(sc, m, TH_ACK) == 0) { + TCPSTAT_INC(tcps_sndacks); + TCPSTAT_INC(tcps_sndtotal); + } else { + syncache_drop(sc, sch); + TCPSTAT_INC(tcps_sc_dropped); + } } } else { if ((s = tcp_log_addrs(inc, th, NULL, NULL))) @@ -1549,6 +1561,9 @@ syncache_add(struct in_conninfo *inc, struct tcpopt *to, struct tcphdr *th, syncache_timeout(sc, sch, 1); TCPSTAT_INC(tcps_sndacks); TCPSTAT_INC(tcps_sndtotal); + } else { + syncache_drop(sc, sch); + TCPSTAT_INC(tcps_sc_dropped); } SCH_UNLOCK(sch); goto donenoprobe; |