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Fix a bug where two SHUTDOWN_ACK chunks were sent if a SHUTDOWN chunk was

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received acking all outstanding data.
This commit is contained in:
Michael Tuexen 2015-09-03 22:15:56 +00:00
parent 14bdbaf2e4
commit aa1cfca969
1 changed files with 15 additions and 10 deletions
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25
sys/netinet/sctp_input.c
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@ -867,6 +867,7 @@ sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
{
struct sctp_association *asoc;
int some_on_streamwheel;
int old_state;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
@ -885,11 +886,11 @@ sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
/* Shutdown NOT the expected size */
return;
} else {
sctp_update_acked(stcb, cp, abort_flag);
if (*abort_flag) {
return;
}
}
old_state = SCTP_GET_STATE(asoc);
sctp_update_acked(stcb, cp, abort_flag);
if (*abort_flag) {
return;
}
if (asoc->control_pdapi) {
/*
@ -959,12 +960,16 @@ sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
}
SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_ACK_SENT);
SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
sctp_stop_timers_for_shutdown(stcb);
sctp_send_shutdown_ack(stcb, net);
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep,
stcb, net);
if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_ACK_SENT);
sctp_stop_timers_for_shutdown(stcb);
sctp_send_shutdown_ack(stcb, net);
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
stcb->sctp_ep, stcb, net);
} else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
sctp_send_shutdown_ack(stcb, net);
}
}
}