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[NETFILTER]: PPTP conntrack: check call ID before changing state 

For rejected calls the state is set to PPTP_CALL_NONE even for non-matching
call ids.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2006-09-20 12:10:37 -07:00 committed by David S. Miller
parent 87a0117afd
commit 750a584233
1 changed files with 13 additions and 19 deletions
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32
net/ipv4/netfilter/ip_conntrack_helper_pptp.c
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@ -335,25 +335,19 @@ pptp_inbound_pkt(struct sk_buff **pskb,
info->cstate != PPTP_CALL_OUT_CONF)
goto invalid;
if (pptpReq->ocack.resultCode != PPTP_OUTCALL_CONNECT) {
info->cstate = PPTP_CALL_NONE;
break;
}
cid = pptpReq->ocack.callID;
pcid = pptpReq->ocack.peersCallID;
info->pac_call_id = cid;
if (info->pns_call_id != pcid)
goto invalid;
DEBUGP("%s, CID=%X, PCID=%X\n", pptp_msg_name[msg],
ntohs(cid), ntohs(pcid));
info->cstate = PPTP_CALL_OUT_CONF;
exp_gre(ct, cid, pcid);
if (pptpReq->ocack.resultCode == PPTP_OUTCALL_CONNECT) {
info->cstate = PPTP_CALL_OUT_CONF;
info->pac_call_id = cid;
exp_gre(ct, cid, pcid);
} else
info->cstate = PPTP_CALL_NONE;
break;
case PPTP_IN_CALL_REQUEST:
@ -464,17 +458,17 @@ pptp_outbound_pkt(struct sk_buff **pskb,
info->cstate != PPTP_CALL_IN_REP)
goto invalid;
if (pptpReq->icack.resultCode != PPTP_INCALL_ACCEPT) {
info->cstate = PPTP_CALL_NONE;
break;
}
pcid = pptpReq->icack.peersCallID;
if (info->pac_call_id != pcid)
goto invalid;
DEBUGP("%s, CID=%X\n", pptp_msg_name[msg], ntohs(pcid));
/* part two of the three-way handshake */
info->cstate = PPTP_CALL_IN_REP;
info->pns_call_id = pcid;
if (pptpReq->icack.resultCode == PPTP_INCALL_ACCEPT) {
/* part two of the three-way handshake */
info->cstate = PPTP_CALL_IN_REP;
info->pns_call_id = pcid;
} else
info->cstate = PPTP_CALL_NONE;
break;
case PPTP_CALL_CLEAR_REQUEST: