diff options
Diffstat (limited to 'sys/netinet/tcp_timer.c')
-rw-r--r-- | sys/netinet/tcp_timer.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/netinet/tcp_timer.c b/sys/netinet/tcp_timer.c index d4ae4a9..8fb49eb 100644 --- a/sys/netinet/tcp_timer.c +++ b/sys/netinet/tcp_timer.c @@ -246,6 +246,12 @@ tcp_timer_2msl(xtp) INP_INFO_WUNLOCK(&tcbinfo); } +/* + * The timed wait lists contain references to each of the TCP sessions + * currently TIME_WAIT state. The list pointers, including the list pointers + * in each tcptw structure, are protected using the global tcbinfo lock, + * which must be held over list iteration and modification. + */ struct twlist { LIST_HEAD(, tcptw) tw_list; struct tcptw tw_tail; @@ -273,6 +279,7 @@ tcp_timer_2msl_reset(struct tcptw *tw, int timeo) int i; struct tcptw *tw_tail; + INP_INFO_WLOCK_ASSERT(&tcbinfo); if (tw->tw_time != 0) LIST_REMOVE(tw, tw_2msl); tw->tw_time = timeo + ticks; @@ -285,6 +292,7 @@ void tcp_timer_2msl_stop(struct tcptw *tw) { + INP_INFO_WLOCK_ASSERT(&tcbinfo); if (tw->tw_time != 0) LIST_REMOVE(tw, tw_2msl); } @@ -296,6 +304,7 @@ tcp_timer_2msl_tw(int reuse) struct twlist *twl; int i; + INP_INFO_WLOCK_ASSERT(&tcbinfo); for (i = 0; i < 2; i++) { twl = tw_2msl_list[i]; tw_tail = &twl->tw_tail; |