/****************************************************************************/
static int set_addr(struct sk_buff **pskb,
unsigned char **data, int dataoff,
- unsigned int addroff, u_int32_t ip, u_int16_t port)
+ unsigned int addroff, __be32 ip, u_int16_t port)
{
enum ip_conntrack_info ctinfo;
struct ip_conntrack *ct = ip_conntrack_get(*pskb, &ctinfo);
struct {
- u_int32_t ip;
- u_int16_t port;
+ __be32 ip;
+ __be16 port;
} __attribute__ ((__packed__)) buf;
struct tcphdr _tcph, *th;
static int set_h225_addr(struct sk_buff **pskb,
unsigned char **data, int dataoff,
TransportAddress * addr,
- u_int32_t ip, u_int16_t port)
+ __be32 ip, u_int16_t port)
{
return set_addr(pskb, data, dataoff, addr->ipAddress.ip, ip, port);
}
static int set_h245_addr(struct sk_buff **pskb,
unsigned char **data, int dataoff,
H245_TransportAddress * addr,
- u_int32_t ip, u_int16_t port)
+ __be32 ip, u_int16_t port)
{
return set_addr(pskb, data, dataoff,
addr->unicastAddress.iPAddress.network, ip, port);
struct ip_ct_h323_master *info = &ct->help.ct_h323_info;
int dir = CTINFO2DIR(ctinfo);
int i;
- u_int32_t ip;
+ __be32 ip;
u_int16_t port;
for (i = 0; i < count; i++) {
{
int dir = CTINFO2DIR(ctinfo);
int i;
- u_int32_t ip;
+ __be32 ip;
u_int16_t port;
for (i = 0; i < count; i++) {
struct ip_ct_h323_master *info = &ct->help.ct_h323_info;
int dir = CTINFO2DIR(ctinfo);
u_int16_t nated_port = port;
- u_int32_t ip;
+ __be32 ip;
/* Set expectations for NAT */
exp->saved_proto.tcp.port = exp->tuple.dst.u.tcp.port;
return 0;
}
+/****************************************************************************/
+static void ip_nat_callforwarding_expect(struct ip_conntrack *new,
+ struct ip_conntrack_expect *this)
+{
+ struct ip_nat_range range;
+
+ /* This must be a fresh one. */
+ BUG_ON(new->status & IPS_NAT_DONE_MASK);
+
+ /* Change src to where master sends to */
+ range.flags = IP_NAT_RANGE_MAP_IPS;
+ range.min_ip = range.max_ip = new->tuplehash[!this->dir].tuple.src.ip;
+
+ /* hook doesn't matter, but it has to do source manip */
+ ip_nat_setup_info(new, &range, NF_IP_POST_ROUTING);
+
+ /* For DST manip, map port here to where it's expected. */
+ range.flags = (IP_NAT_RANGE_MAP_IPS | IP_NAT_RANGE_PROTO_SPECIFIED);
+ range.min = range.max = this->saved_proto;
+ range.min_ip = range.max_ip = this->saved_ip;
+
+ /* hook doesn't matter, but it has to do destination manip */
+ ip_nat_setup_info(new, &range, NF_IP_PRE_ROUTING);
+
+ ip_conntrack_q931_expect(new, this);
+}
+
+/****************************************************************************/
+static int nat_callforwarding(struct sk_buff **pskb, struct ip_conntrack *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned char **data, int dataoff,
+ TransportAddress * addr, u_int16_t port,
+ struct ip_conntrack_expect *exp)
+{
+ int dir = CTINFO2DIR(ctinfo);
+ u_int16_t nated_port;
+
+ /* Set expectations for NAT */
+ exp->saved_ip = exp->tuple.dst.ip;
+ exp->tuple.dst.ip = ct->tuplehash[!dir].tuple.dst.ip;
+ exp->saved_proto.tcp.port = exp->tuple.dst.u.tcp.port;
+ exp->expectfn = ip_nat_callforwarding_expect;
+ exp->dir = !dir;
+
+ /* Try to get same port: if not, try to change it. */
+ for (nated_port = port; nated_port != 0; nated_port++) {
+ exp->tuple.dst.u.tcp.port = htons(nated_port);
+ if (ip_conntrack_expect_related(exp) == 0)
+ break;
+ }
+
+ if (nated_port == 0) { /* No port available */
+ if (net_ratelimit())
+ printk("ip_nat_q931: out of TCP ports\n");
+ return 0;
+ }
+
+ /* Modify signal */
+ if (!set_h225_addr(pskb, data, dataoff, addr,
+ ct->tuplehash[!dir].tuple.dst.ip,
+ nated_port) == 0) {
+ ip_conntrack_unexpect_related(exp);
+ return -1;
+ }
+
+ /* Success */
+ DEBUGP("ip_nat_q931: expect Call Forwarding "
+ "%u.%u.%u.%u:%hu->%u.%u.%u.%u:%hu\n",
+ NIPQUAD(exp->tuple.src.ip), ntohs(exp->tuple.src.u.tcp.port),
+ NIPQUAD(exp->tuple.dst.ip), ntohs(exp->tuple.dst.u.tcp.port));
+
+ return 0;
+}
+
/****************************************************************************/
static int __init init(void)
{
- BUG_ON(set_h245_addr_hook != NULL);
- BUG_ON(set_h225_addr_hook != NULL);
- BUG_ON(set_sig_addr_hook != NULL);
- BUG_ON(set_ras_addr_hook != NULL);
- BUG_ON(nat_rtp_rtcp_hook != NULL);
- BUG_ON(nat_t120_hook != NULL);
- BUG_ON(nat_h245_hook != NULL);
- BUG_ON(nat_q931_hook != NULL);
-
- set_h245_addr_hook = set_h245_addr;
- set_h225_addr_hook = set_h225_addr;
- set_sig_addr_hook = set_sig_addr;
- set_ras_addr_hook = set_ras_addr;
- nat_rtp_rtcp_hook = nat_rtp_rtcp;
- nat_t120_hook = nat_t120;
- nat_h245_hook = nat_h245;
- nat_q931_hook = nat_q931;
+ BUG_ON(rcu_dereference(set_h245_addr_hook) != NULL);
+ BUG_ON(rcu_dereference(set_h225_addr_hook) != NULL);
+ BUG_ON(rcu_dereference(set_sig_addr_hook) != NULL);
+ BUG_ON(rcu_dereference(set_ras_addr_hook) != NULL);
+ BUG_ON(rcu_dereference(nat_rtp_rtcp_hook) != NULL);
+ BUG_ON(rcu_dereference(nat_t120_hook) != NULL);
+ BUG_ON(rcu_dereference(nat_h245_hook) != NULL);
+ BUG_ON(rcu_dereference(nat_callforwarding_hook) != NULL);
+ BUG_ON(rcu_dereference(nat_q931_hook) != NULL);
+
+ rcu_assign_pointer(set_h245_addr_hook, set_h245_addr);
+ rcu_assign_pointer(set_h225_addr_hook, set_h225_addr);
+ rcu_assign_pointer(set_sig_addr_hook, set_sig_addr);
+ rcu_assign_pointer(set_ras_addr_hook, set_ras_addr);
+ rcu_assign_pointer(nat_rtp_rtcp_hook, nat_rtp_rtcp);
+ rcu_assign_pointer(nat_t120_hook, nat_t120);
+ rcu_assign_pointer(nat_h245_hook, nat_h245);
+ rcu_assign_pointer(nat_callforwarding_hook, nat_callforwarding);
+ rcu_assign_pointer(nat_q931_hook, nat_q931);
DEBUGP("ip_nat_h323: init success\n");
return 0;
/****************************************************************************/
static void __exit fini(void)
{
- set_h245_addr_hook = NULL;
- set_h225_addr_hook = NULL;
- set_sig_addr_hook = NULL;
- set_ras_addr_hook = NULL;
- nat_rtp_rtcp_hook = NULL;
- nat_t120_hook = NULL;
- nat_h245_hook = NULL;
- nat_q931_hook = NULL;
- synchronize_net();
+ rcu_assign_pointer(set_h245_addr_hook, NULL);
+ rcu_assign_pointer(set_h225_addr_hook, NULL);
+ rcu_assign_pointer(set_sig_addr_hook, NULL);
+ rcu_assign_pointer(set_ras_addr_hook, NULL);
+ rcu_assign_pointer(nat_rtp_rtcp_hook, NULL);
+ rcu_assign_pointer(nat_t120_hook, NULL);
+ rcu_assign_pointer(nat_h245_hook, NULL);
+ rcu_assign_pointer(nat_callforwarding_hook, NULL);
+ rcu_assign_pointer(nat_q931_hook, NULL);
+ synchronize_rcu();
}
/****************************************************************************/
git://git.onelab.eu / linux-2.6.git / blobdiff