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-rw-r--r--include/linux/netfilter_ipv4/ip_conntrack_pptp.h2
-rw-r--r--net/ipv4/netfilter/ip_conntrack_helper_pptp.c92
-rw-r--r--net/ipv4/netfilter/ip_nat_helper_pptp.c58
3 files changed, 35 insertions, 117 deletions
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_pptp.h b/include/linux/netfilter_ipv4/ip_conntrack_pptp.h
index 620bf06fabc2..2644b1faddd6 100644
--- a/include/linux/netfilter_ipv4/ip_conntrack_pptp.h
+++ b/include/linux/netfilter_ipv4/ip_conntrack_pptp.h
@@ -315,7 +315,7 @@ extern int
struct PptpControlHeader *ctlh,
union pptp_ctrl_union *pptpReq);
-extern int
+extern void
(*ip_nat_pptp_hook_exp_gre)(struct ip_conntrack_expect *exp_orig,
struct ip_conntrack_expect *exp_reply);
diff --git a/net/ipv4/netfilter/ip_conntrack_helper_pptp.c b/net/ipv4/netfilter/ip_conntrack_helper_pptp.c
index 5f7af6ef3881..57eac6e3871a 100644
--- a/net/ipv4/netfilter/ip_conntrack_helper_pptp.c
+++ b/net/ipv4/netfilter/ip_conntrack_helper_pptp.c
@@ -80,7 +80,7 @@ int
struct PptpControlHeader *ctlh,
union pptp_ctrl_union *pptpReq);
-int
+void
(*ip_nat_pptp_hook_exp_gre)(struct ip_conntrack_expect *expect_orig,
struct ip_conntrack_expect *expect_reply);
@@ -219,93 +219,63 @@ static void pptp_destroy_siblings(struct ip_conntrack *ct)
/* expect GRE connections (PNS->PAC and PAC->PNS direction) */
static inline int
-exp_gre(struct ip_conntrack *master,
+exp_gre(struct ip_conntrack *ct,
__be16 callid,
__be16 peer_callid)
{
- struct ip_conntrack_tuple inv_tuple;
- struct ip_conntrack_tuple exp_tuples[] = {
- /* tuple in original direction, PNS->PAC */
- { .src = { .ip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip,
- .u = { .gre = { .key = peer_callid } }
- },
- .dst = { .ip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip,
- .u = { .gre = { .key = callid } },
- .protonum = IPPROTO_GRE
- },
- },
- /* tuple in reply direction, PAC->PNS */
- { .src = { .ip = master->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip,
- .u = { .gre = { .key = callid } }
- },
- .dst = { .ip = master->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip,
- .u = { .gre = { .key = peer_callid } },
- .protonum = IPPROTO_GRE
- },
- }
- };
struct ip_conntrack_expect *exp_orig, *exp_reply;
int ret = 1;
- exp_orig = ip_conntrack_expect_alloc(master);
+ exp_orig = ip_conntrack_expect_alloc(ct);
if (exp_orig == NULL)
goto out;
- exp_reply = ip_conntrack_expect_alloc(master);
+ exp_reply = ip_conntrack_expect_alloc(ct);
if (exp_reply == NULL)
goto out_put_orig;
- memcpy(&exp_orig->tuple, &exp_tuples[0], sizeof(exp_orig->tuple));
+ /* original direction, PNS->PAC */
+ exp_orig->tuple.src.ip = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip;
+ exp_orig->tuple.src.u.gre.key = peer_callid;
+ exp_orig->tuple.dst.ip = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip;
+ exp_orig->tuple.dst.u.gre.key = callid;
+ exp_orig->tuple.dst.protonum = IPPROTO_GRE;
exp_orig->mask.src.ip = 0xffffffff;
exp_orig->mask.src.u.all = 0;
- exp_orig->mask.dst.u.all = 0;
exp_orig->mask.dst.u.gre.key = htons(0xffff);
exp_orig->mask.dst.ip = 0xffffffff;
exp_orig->mask.dst.protonum = 0xff;
- exp_orig->master = master;
+ exp_orig->master = ct;
exp_orig->expectfn = pptp_expectfn;
exp_orig->flags = 0;
/* both expectations are identical apart from tuple */
memcpy(exp_reply, exp_orig, sizeof(*exp_reply));
- memcpy(&exp_reply->tuple, &exp_tuples[1], sizeof(exp_reply->tuple));
-
- if (ip_nat_pptp_hook_exp_gre)
- ret = ip_nat_pptp_hook_exp_gre(exp_orig, exp_reply);
- else {
- DEBUGP("calling expect_related PNS->PAC");
- DUMP_TUPLE(&exp_orig->tuple);
+ /* reply direction, PAC->PNS */
+ exp_reply->tuple.src.ip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip;
+ exp_reply->tuple.src.u.gre.key = callid;
+ exp_reply->tuple.dst.ip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
+ exp_reply->tuple.dst.u.gre.key = peer_callid;
+ exp_reply->tuple.dst.protonum = IPPROTO_GRE;
- if (ip_conntrack_expect_related(exp_orig) != 0) {
- DEBUGP("cannot expect_related()\n");
- goto out_put_both;
- }
-
- DEBUGP("calling expect_related PAC->PNS");
- DUMP_TUPLE(&exp_reply->tuple);
-
- if (ip_conntrack_expect_related(exp_reply) != 0) {
- DEBUGP("cannot expect_related()\n");
- goto out_unexpect_orig;
- }
-
- /* Add GRE keymap entries */
- if (ip_ct_gre_keymap_add(master, &exp_reply->tuple, 0) != 0) {
- DEBUGP("cannot keymap_add() exp\n");
- goto out_unexpect_both;
- }
-
- invert_tuplepr(&inv_tuple, &exp_reply->tuple);
- if (ip_ct_gre_keymap_add(master, &inv_tuple, 1) != 0) {
- ip_ct_gre_keymap_destroy(master);
- DEBUGP("cannot keymap_add() exp_inv\n");
- goto out_unexpect_both;
- }
- ret = 0;
+ if (ip_nat_pptp_hook_exp_gre)
+ ip_nat_pptp_hook_exp_gre(exp_orig, exp_reply);
+ if (ip_conntrack_expect_related(exp_orig) != 0)
+ goto out_put_both;
+ if (ip_conntrack_expect_related(exp_reply) != 0)
+ goto out_unexpect_orig;
+
+ /* Add GRE keymap entries */
+ if (ip_ct_gre_keymap_add(ct, &exp_orig->tuple, 0) != 0)
+ goto out_unexpect_both;
+ if (ip_ct_gre_keymap_add(ct, &exp_reply->tuple, 1) != 0) {
+ ip_ct_gre_keymap_destroy(ct);
+ goto out_unexpect_both;
}
+ ret = 0;
out_put_both:
ip_conntrack_expect_put(exp_reply);
diff --git a/net/ipv4/netfilter/ip_nat_helper_pptp.c b/net/ipv4/netfilter/ip_nat_helper_pptp.c
index 0f5e753b481d..84f6bd09fcd4 100644
--- a/net/ipv4/netfilter/ip_nat_helper_pptp.c
+++ b/net/ipv4/netfilter/ip_nat_helper_pptp.c
@@ -211,80 +211,28 @@ pptp_outbound_pkt(struct sk_buff **pskb,
return NF_ACCEPT;
}
-static int
+static void
pptp_exp_gre(struct ip_conntrack_expect *expect_orig,
struct ip_conntrack_expect *expect_reply)
{
- struct ip_ct_pptp_master *ct_pptp_info =
- &expect_orig->master->help.ct_pptp_info;
- struct ip_nat_pptp *nat_pptp_info =
- &expect_orig->master->nat.help.nat_pptp_info;
-
struct ip_conntrack *ct = expect_orig->master;
-
- struct ip_conntrack_tuple inv_t;
- struct ip_conntrack_tuple *orig_t, *reply_t;
+ struct ip_ct_pptp_master *ct_pptp_info = &ct->help.ct_pptp_info;
+ struct ip_nat_pptp *nat_pptp_info = &ct->nat.help.nat_pptp_info;
/* save original PAC call ID in nat_info */
nat_pptp_info->pac_call_id = ct_pptp_info->pac_call_id;
- /* alter expectation */
- orig_t = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
- reply_t = &ct->tuplehash[IP_CT_DIR_REPLY].tuple;
-
/* alter expectation for PNS->PAC direction */
- invert_tuplepr(&inv_t, &expect_orig->tuple);
expect_orig->saved_proto.gre.key = ct_pptp_info->pns_call_id;
expect_orig->tuple.src.u.gre.key = nat_pptp_info->pns_call_id;
expect_orig->tuple.dst.u.gre.key = ct_pptp_info->pac_call_id;
expect_orig->dir = IP_CT_DIR_ORIGINAL;
- inv_t.src.ip = reply_t->src.ip;
- inv_t.dst.ip = reply_t->dst.ip;
- inv_t.src.u.gre.key = nat_pptp_info->pac_call_id;
- inv_t.dst.u.gre.key = ct_pptp_info->pns_call_id;
-
- if (!ip_conntrack_expect_related(expect_orig)) {
- DEBUGP("successfully registered expect\n");
- } else {
- DEBUGP("can't expect_related(expect_orig)\n");
- return 1;
- }
/* alter expectation for PAC->PNS direction */
- invert_tuplepr(&inv_t, &expect_reply->tuple);
expect_reply->saved_proto.gre.key = nat_pptp_info->pns_call_id;
expect_reply->tuple.src.u.gre.key = nat_pptp_info->pac_call_id;
expect_reply->tuple.dst.u.gre.key = ct_pptp_info->pns_call_id;
expect_reply->dir = IP_CT_DIR_REPLY;
- inv_t.src.ip = orig_t->src.ip;
- inv_t.dst.ip = orig_t->dst.ip;
- inv_t.src.u.gre.key = nat_pptp_info->pns_call_id;
- inv_t.dst.u.gre.key = ct_pptp_info->pac_call_id;
-
- if (!ip_conntrack_expect_related(expect_reply)) {
- DEBUGP("successfully registered expect\n");
- } else {
- DEBUGP("can't expect_related(expect_reply)\n");
- ip_conntrack_unexpect_related(expect_orig);
- return 1;
- }
-
- if (ip_ct_gre_keymap_add(ct, &expect_reply->tuple, 0) < 0) {
- DEBUGP("can't register original keymap\n");
- ip_conntrack_unexpect_related(expect_orig);
- ip_conntrack_unexpect_related(expect_reply);
- return 1;
- }
-
- if (ip_ct_gre_keymap_add(ct, &inv_t, 1) < 0) {
- DEBUGP("can't register reply keymap\n");
- ip_conntrack_unexpect_related(expect_orig);
- ip_conntrack_unexpect_related(expect_reply);
- ip_ct_gre_keymap_destroy(ct);
- return 1;
- }
-
- return 0;
}
/* inbound packets == from PAC to PNS */
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