diff options
Diffstat (limited to 'sys/netinet/tcp_subr.c')
| -rw-r--r-- | sys/netinet/tcp_subr.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c index d2a28c8..d77ab59 100644 --- a/sys/netinet/tcp_subr.c +++ b/sys/netinet/tcp_subr.c @@ -1637,6 +1637,7 @@ tcp_twstart(tp) tw->snd_nxt = tp->snd_nxt; tw->rcv_nxt = tp->rcv_nxt; + tw->iss = tp->iss; tw->cc_recv = tp->cc_recv; tw->cc_send = tp->cc_send; tw->t_starttime = tp->t_starttime; @@ -1671,6 +1672,24 @@ tcp_twstart(tp) INP_UNLOCK(inp); } +/* + * Determine if the ISN we will generate has advanced beyond the last + * sequence number used by the previous connection. If so, indicate + * that it is safe to recycle this tw socket by returning 1. + */ +int +tcp_twrecycleable(struct tcptw *tw) +{ + tcp_seq new_isn = tw->iss; + + new_isn += (ticks - tw->t_starttime) * (ISN_BYTES_PER_SECOND / hz); + + if (SEQ_GT(new_isn, tw->snd_nxt)) + return 1; + else + return 0; +} + struct tcptw * tcp_twclose(struct tcptw *tw, int reuse) { |
