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tcp: memset paranoia, synced from sources

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This commit is contained in:
cinap_lenrek 2012-07-09 21:01:42 +02:00
parent 357aef46a5
commit 546ee86c52
1 changed files with 5 additions and 0 deletions
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5
sys/src/9/ip/tcp.c
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@ -1345,6 +1345,7 @@ tcphangup(Conv *s)
return commonerror();
if(ipcmp(s->raddr, IPnoaddr) != 0) {
if(!waserror()){
memset(&seg, 0, sizeof seg);
seg.flags = RST | ACK;
seg.ack = tcb->rcv.nxt;
tcb->rcv.una = 0;
@ -1413,6 +1414,7 @@ sndsynack(Proto *tcp, Limbo *lp)
panic("sndrst: version %d", lp->version);
}
memset(&seg, 0, sizeof seg);
seg.seq = lp->iss;
seg.ack = lp->irs+1;
seg.flags = SYN|ACK;
@ -1960,6 +1962,7 @@ tcpiput(Proto *tcp, Ipifc*, Block *bp)
h4 = (Tcp4hdr*)(bp->rp);
h6 = (Tcp6hdr*)(bp->rp);
memset(&seg, 0, sizeof seg);
if((h4->vihl&0xF0)==IP_VER4) {
version = V4;
@ -2445,6 +2448,7 @@ tcpoutput(Conv *s)
f = s->p->f;
tpriv = s->p->priv;
version = s->ipversion;
memset(&seg, 0, sizeof seg);
for(msgs = 0; msgs < 100; msgs++) {
tcb = (Tcpctl*)s->ptcl;
@ -2657,6 +2661,7 @@ tcpsendka(Conv *s)
tcb = (Tcpctl*)s->ptcl;
dbp = nil;
memset(&seg, 0, sizeof seg);
seg.urg = 0;
seg.source = s->lport;
seg.dest = s->rport;