/* FTP extension for IP connection tracking. */
-/* (C) 1999-2001 Paul `Rusty' Russell
+/* (C) 1999-2001 Paul `Rusty' Russell
* (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
*
* This program is free software; you can redistribute it and/or modify
int length;
/* First character is delimiter, then "1" for IPv4, then
- delimiter again. */
+ delimiter again. */
if (dlen <= 3) return 0;
delim = data[0];
if (isdigit(delim) || delim < 33 || delim > 126
struct ip_conntrack_expect *exp;
unsigned int i;
int found = 0, ends_in_nl;
+ typeof(ip_nat_ftp_hook) ip_nat_ftp;
/* Until there's been traffic both ways, don't look in packets. */
if (ctinfo != IP_CT_ESTABLISHED
if (!find_nl_seq(ntohl(th->seq), ct_ftp_info, dir)) {
/* Now if this ends in \n, update ftp info. */
DEBUGP("ip_conntrack_ftp_help: wrong seq pos %s(%u) or %s(%u)\n",
- ct_ftp_info->seq_aft_nl[0][dir]
+ ct_ftp_info->seq_aft_nl[0][dir]
old_seq_aft_nl_set ? "":"(UNSET) ", old_seq_aft_nl);
ret = NF_ACCEPT;
goto out_update_nl;
}
/* Initialize IP array to expected address (it's not mentioned
- in EPSV responses) */
+ in EPSV responses) */
array[0] = (ntohl(ct->tuplehash[dir].tuple.src.ip) >> 24) & 0xFF;
array[1] = (ntohl(ct->tuplehash[dir].tuple.src.ip) >> 16) & 0xFF;
array[2] = (ntohl(ct->tuplehash[dir].tuple.src.ip) >> 8) & 0xFF;
DEBUGP("conntrack_ftp: match `%s' (%u bytes at %u)\n",
fb_ptr + matchoff, matchlen, ntohl(th->seq) + matchoff);
-
+
/* Allocate expectation which will be inserted */
exp = ip_conntrack_expect_alloc(ct);
if (exp == NULL) {
/* Now, NAT might want to mangle the packet, and register the
* (possibly changed) expectation itself. */
- if (ip_nat_ftp_hook)
- ret = ip_nat_ftp_hook(pskb, ctinfo, search[dir][i].ftptype,
- matchoff, matchlen, exp, &seq);
+ ip_nat_ftp = rcu_dereference(ip_nat_ftp_hook);
+ if (ip_nat_ftp)
+ ret = ip_nat_ftp(pskb, ctinfo, search[dir][i].ftptype,
+ matchoff, matchlen, exp, &seq);
else {
/* Can't expect this? Best to drop packet now. */
if (ip_conntrack_expect_related(exp) != 0)
sprintf(tmpname, "ftp-%d", ports[i]);
ftp[i].name = tmpname;
- DEBUGP("ip_ct_ftp: registering helper for port %d\n",
+ DEBUGP("ip_ct_ftp: registering helper for port %d\n",
ports[i]);
ret = ip_conntrack_helper_register(&ftp[i]);