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Diffstat (limited to 'sys/netinet/tcp_timer.c')
-rw-r--r--sys/netinet/tcp_timer.c9
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;
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