diff options
author | Len Brown <len.brown@intel.com> | 2006-01-07 03:50:18 -0500 |
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committer | Len Brown <len.brown@intel.com> | 2006-01-07 03:50:18 -0500 |
commit | ed03f430cdc8c802652467e9097606fedc2c7abc (patch) | |
tree | 30941ec1e6f93e99358fefe18175e5dd800a4379 /net/sctp/input.c | |
parent | ed349a8a0a780ed27e2a765f16cee54d9b63bfee (diff) | |
parent | 6f957eaf79356a32e838f5f262ee9a60544b1d5b (diff) | |
download | op-kernel-dev-ed03f430cdc8c802652467e9097606fedc2c7abc.zip op-kernel-dev-ed03f430cdc8c802652467e9097606fedc2c7abc.tar.gz |
Pull pnpacpi into acpica branch
Diffstat (limited to 'net/sctp/input.c')
-rw-r--r-- | net/sctp/input.c | 36 |
1 files changed, 27 insertions, 9 deletions
diff --git a/net/sctp/input.c b/net/sctp/input.c index b24ff2c..238f1bf 100644 --- a/net/sctp/input.c +++ b/net/sctp/input.c @@ -305,18 +305,36 @@ int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb) void sctp_icmp_frag_needed(struct sock *sk, struct sctp_association *asoc, struct sctp_transport *t, __u32 pmtu) { - if (unlikely(pmtu < SCTP_DEFAULT_MINSEGMENT)) { - printk(KERN_WARNING "%s: Reported pmtu %d too low, " - "using default minimum of %d\n", __FUNCTION__, pmtu, - SCTP_DEFAULT_MINSEGMENT); - pmtu = SCTP_DEFAULT_MINSEGMENT; - } + if (sock_owned_by_user(sk) || !t || (t->pathmtu == pmtu)) + return; - if (!sock_owned_by_user(sk) && t && (t->pmtu != pmtu)) { - t->pmtu = pmtu; + if (t->param_flags & SPP_PMTUD_ENABLE) { + if (unlikely(pmtu < SCTP_DEFAULT_MINSEGMENT)) { + printk(KERN_WARNING "%s: Reported pmtu %d too low, " + "using default minimum of %d\n", + __FUNCTION__, pmtu, + SCTP_DEFAULT_MINSEGMENT); + /* Use default minimum segment size and disable + * pmtu discovery on this transport. + */ + t->pathmtu = SCTP_DEFAULT_MINSEGMENT; + t->param_flags = (t->param_flags & ~SPP_HB) | + SPP_PMTUD_DISABLE; + } else { + t->pathmtu = pmtu; + } + + /* Update association pmtu. */ sctp_assoc_sync_pmtu(asoc); - sctp_retransmit(&asoc->outqueue, t, SCTP_RTXR_PMTUD); } + + /* Retransmit with the new pmtu setting. + * Normally, if PMTU discovery is disabled, an ICMP Fragmentation + * Needed will never be sent, but if a message was sent before + * PMTU discovery was disabled that was larger than the PMTU, it + * would not be fragmented, so it must be re-transmitted fragmented. + */ + sctp_retransmit(&asoc->outqueue, t, SCTP_RTXR_PMTUD); } /* |