diff options
| -rw-r--r-- | net/ipv4/netfilter/ip_nat_helper_pptp.c | 36 |
1 files changed, 13 insertions, 23 deletions
diff --git a/net/ipv4/netfilter/ip_nat_helper_pptp.c b/net/ipv4/netfilter/ip_nat_helper_pptp.c index 50960cb681f..ac004895781 100644 --- a/net/ipv4/netfilter/ip_nat_helper_pptp.c +++ b/net/ipv4/netfilter/ip_nat_helper_pptp.c @@ -299,8 +299,6 @@ pptp_inbound_pkt(struct sk_buff **pskb, u_int16_t msg, new_cid = 0, new_pcid; unsigned int pcid_off, cid_off = 0; - int ret = NF_ACCEPT, rv; - new_pcid = htons(nat_pptp_info->pns_call_id); switch (msg = ntohs(ctlh->messageType)) { @@ -345,32 +343,24 @@ pptp_inbound_pkt(struct sk_buff **pskb, /* mangle packet */ DEBUGP("altering peer call id from 0x%04x to 0x%04x\n", ntohs(*(u_int16_t *)pptpReq + pcid_off), ntohs(new_pcid)); - - rv = ip_nat_mangle_tcp_packet(pskb, ct, ctinfo, - pcid_off + sizeof(struct pptp_pkt_hdr) + - sizeof(struct PptpControlHeader), - sizeof(new_pcid), (char *)&new_pcid, - sizeof(new_pcid)); - if (rv != NF_ACCEPT) - return rv; + + if (ip_nat_mangle_tcp_packet(pskb, ct, ctinfo, + pcid_off + sizeof(struct pptp_pkt_hdr) + + sizeof(struct PptpControlHeader), + sizeof(new_pcid), (char *)&new_pcid, + sizeof(new_pcid)) == 0) + return NF_DROP; if (new_cid) { DEBUGP("altering call id from 0x%04x to 0x%04x\n", ntohs(*(u_int16_t *)pptpReq + cid_off), ntohs(new_cid)); - rv = ip_nat_mangle_tcp_packet(pskb, ct, ctinfo, - cid_off + sizeof(struct pptp_pkt_hdr) + - sizeof(struct PptpControlHeader), - sizeof(new_cid), (char *)&new_cid, - sizeof(new_cid)); - if (rv != NF_ACCEPT) - return rv; + if (ip_nat_mangle_tcp_packet(pskb, ct, ctinfo, + cid_off + sizeof(struct pptp_pkt_hdr) + + sizeof(struct PptpControlHeader), + sizeof(new_cid), (char *)&new_cid, + sizeof(new_cid)) == 0) + return NF_DROP; } - - /* check for earlier return value of 'switch' above */ - if (ret != NF_ACCEPT) - return ret; - - /* great, at least we don't need to resize packets */ return NF_ACCEPT; } |