From 750a58423309b56751076329e9edf61b93213e0f Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Wed, 20 Sep 2006 12:10:37 -0700 Subject: [PATCH] [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 Signed-off-by: David S. Miller --- net/ipv4/netfilter/ip_conntrack_helper_pptp.c | 32 ++++++++----------- 1 file changed, 13 insertions(+), 19 deletions(-) diff --git a/net/ipv4/netfilter/ip_conntrack_helper_pptp.c b/net/ipv4/netfilter/ip_conntrack_helper_pptp.c index 7b6d5aaca4da..5cb6b61cd171 100644 --- a/net/ipv4/netfilter/ip_conntrack_helper_pptp.c +++ b/net/ipv4/netfilter/ip_conntrack_helper_pptp.c @@ -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: -- GitLab