Author: tuexen
Date: Wed Sep 16 14:23:31 2009
New Revision: 197257
URL: http://svn.freebsd.org/changeset/base/197257
Log:
Fix a bug reported by Daniel Mentz:
When authenticating DATA chunks some DATA chunks
might get stuck when the MTU gets decreased via
an ICMP message.
Approved by: rrs (mentor)
MFC after: immediately
Modified:
head/sys/netinet/sctp_usrreq.c
Modified: head/sys/netinet/sctp_usrreq.c
==============================================================================
--- head/sys/netinet/sctp_usrreq.c Wed Sep 16 13:44:12 2009
(r197256)
+++ head/sys/netinet/sctp_usrreq.c Wed Sep 16 14:23:31 2009
(r197257)
@@ -106,6 +106,7 @@ sctp_pathmtu_adjustment(struct sctp_inpc
uint16_t nxtsz)
{
struct sctp_tmit_chunk *chk;
+ uint16_t overhead;
/* Adjust that too */
stcb->asoc.smallest_mtu = nxtsz;
@@ -114,13 +115,17 @@ sctp_pathmtu_adjustment(struct sctp_inpc
SCTP_PRINTF("sctp_pathmtu_adjust called inp:%p stcb:%p net:%p
nxtsz:%d\n",
inp, stcb, net, nxtsz);
#endif
+ overhead = IP_HDR_SIZE;
+ if (sctp_auth_is_required_chunk(SCTP_DATA,
stcb->asoc.peer_auth_chunks)) {
+ overhead += sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
+ }
TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) {
- if ((chk->send_size + IP_HDR_SIZE) > nxtsz) {
+ if ((chk->send_size + overhead) > nxtsz) {
chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
}
}
TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
- if ((chk->send_size + IP_HDR_SIZE) > nxtsz) {
+ if ((chk->send_size + overhead) > nxtsz) {
/*
* For this guy we also mark for immediate resend
* since we sent to big of chunk
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