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Fix a bug reported by Daniel Mentz:

Browse Source 
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
This commit is contained in:
Michael Tuexen 2009-09-16 14:23:31 +00:00
parent 22c125a1b6
commit d830c305ea
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=197257
1 changed files with 7 additions and 2 deletions
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9
sys/netinet/sctp_usrreq.c
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@ -106,6 +106,7 @@ sctp_pathmtu_adjustment(struct sctp_inpcb *inp,
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_inpcb *inp,
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