d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Correct handling of SYN packets that are to the left of the current window of an ESTABLISHED connection.

Browse Source 
Reviewed by:        net@, gnn
Approved by:        dfr (mentor)
This commit is contained in:
Zachary Loafman 2009-05-27 17:02:10 +00:00
parent 6d72217368
commit 81ad7eb017
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
sys/netinet/tcp_input.c
View File

@ -1818,7 +1818,11 @@ tcp_do_segment(struct mbuf *m, struct tcphdr *th, struct socket *so,
todrop = tp->rcv_nxt - th->th_seq;
if (todrop > 0) {
if (thflags & TH_SYN) {
/*
* If this is a duplicate SYN for our current connection,
* advance over it and pretend and it's not a SYN.
*/
if (thflags & TH_SYN && th->th_seq == tp->irs) {
thflags &= ~TH_SYN;
th->th_seq++;
if (th->th_urp > 1)