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sctp: drop packet with SHUTDOWN-ACK chunks with wrong vtags 

MFC after:	3 days
This commit is contained in:
Michael Tuexen 2021-05-04 18:42:31 +02:00
parent 1bffa44166
commit b621fbb1bf
1 changed files with 0 additions and 21 deletions
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21
sys/netinet/sctp_input.c
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@ -4502,27 +4502,6 @@ sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
}
return (NULL);
}
} else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
if (vtag_in != asoc->my_vtag) {
/*
* this could be a stale SHUTDOWN-ACK or the
* peer never got the SHUTDOWN-COMPLETE and
* is still hung; we have started a new asoc
* but it won't complete until the shutdown
* is completed
*/
if (stcb != NULL) {
SCTP_TCB_UNLOCK(stcb);
}
SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
msg);
sctp_handle_ootb(m, iphlen, *offset, src, dst,
sh, inp, op_err,
mflowtype, mflowid, fibnum,
vrf_id, port);
return (NULL);
}
} else {
/* for all other chunks, vtag must match */
if (vtag_in != asoc->my_vtag) {