static int process_irr(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
unsigned char **data, InfoRequestResponse *irr)
{
int ret;
typeof(set_ras_addr_hook) set_ras_addr;
typeof(set_sig_addr_hook) set_sig_addr;
pr_debug("nf_ct_ras: IRR\n");
set_ras_addr = rcu_dereference(set_ras_addr_hook);
if (set_ras_addr && ct->status & IPS_NAT_MASK) {
ret = set_ras_addr(skb, ct, ctinfo, data,
&irr->rasAddress, 1);
if (ret < 0)
return -1;
}
set_sig_addr = rcu_dereference(set_sig_addr_hook);
if (set_sig_addr && ct->status & IPS_NAT_MASK) {
ret = set_sig_addr(skb, ct, ctinfo, data,
irr->callSignalAddress.item,
irr->callSignalAddress.count);
if (ret < 0)
return -1;
}
return 0;
}
static int process_urq(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
unsigned char **data, UnregistrationRequest *urq)
{
struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
int dir = CTINFO2DIR(ctinfo);
int ret;
typeof(set_sig_addr_hook) set_sig_addr;
pr_debug("nf_ct_ras: URQ\n");
#ifdef CONFIG_HTC_NETWORK_MODIFY
if (IS_ERR(info) || (!info))
printk(KERN_ERR "[NET] info is NULL in %s!\n", __func__);
#endif
set_sig_addr = rcu_dereference(set_sig_addr_hook);
if (set_sig_addr && ct->status & IPS_NAT_MASK) {
ret = set_sig_addr(skb, ct, ctinfo, data,
urq->callSignalAddress.item,
urq->callSignalAddress.count);
if (ret < 0)
return -1;
}
nf_ct_remove_expectations(ct);
info->sig_port[dir] = 0;
info->sig_port[!dir] = 0;
nf_ct_refresh(ct, skb, 30 * HZ);
return 0;
}
static int process_urq(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
unsigned char **data, UnregistrationRequest *urq)
{
struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
int dir = CTINFO2DIR(ctinfo);
int ret;
typeof(set_sig_addr_hook) set_sig_addr;
pr_debug("nf_ct_ras: URQ\n");
set_sig_addr = rcu_dereference(set_sig_addr_hook);
if (set_sig_addr && ct->status & IPS_NAT_MASK) {
ret = set_sig_addr(skb, ct, ctinfo, data,
urq->callSignalAddress.item,
urq->callSignalAddress.count);
if (ret < 0)
return -1;
}
nf_ct_remove_expectations(ct);
info->sig_port[dir] = 0;
info->sig_port[!dir] = 0;
nf_ct_refresh(ct, skb, 30 * HZ);
return 0;
}
static int process_rcf(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
unsigned char **data, RegistrationConfirm *rcf)
{
struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
int dir = CTINFO2DIR(ctinfo);
int ret;
struct nf_conntrack_expect *exp;
typeof(set_sig_addr_hook) set_sig_addr;
pr_debug("nf_ct_ras: RCF\n");
#ifdef CONFIG_HTC_NETWORK_MODIFY
if (IS_ERR(info) || (!info))
printk(KERN_ERR "[NET] info is NULL in %s!\n", __func__);
#endif
set_sig_addr = rcu_dereference(set_sig_addr_hook);
if (set_sig_addr && ct->status & IPS_NAT_MASK) {
ret = set_sig_addr(skb, ct, ctinfo, data,
rcf->callSignalAddress.item,
rcf->callSignalAddress.count);
if (ret < 0)
return -1;
}
if (rcf->options & eRegistrationConfirm_timeToLive) {
pr_debug("nf_ct_ras: RCF TTL = %u seconds\n", rcf->timeToLive);
info->timeout = rcf->timeToLive;
}
if (info->timeout > 0) {
pr_debug("nf_ct_ras: set RAS connection timeout to "
"%u seconds\n", info->timeout);
nf_ct_refresh(ct, skb, info->timeout * HZ);
spin_lock_bh(&nf_conntrack_lock);
exp = find_expect(ct, &ct->tuplehash[dir].tuple.dst.u3,
info->sig_port[!dir]);
if (exp) {
pr_debug("nf_ct_ras: set Q.931 expect "
"timeout to %u seconds for",
info->timeout);
nf_ct_dump_tuple(&exp->tuple);
set_expect_timeout(exp, info->timeout);
}
spin_unlock_bh(&nf_conntrack_lock);
}
return 0;
}
static int process_acf(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
unsigned char **data, AdmissionConfirm *acf)
{
int dir = CTINFO2DIR(ctinfo);
int ret = 0;
__be16 port;
union nf_inet_addr addr;
struct nf_conntrack_expect *exp;
typeof(set_sig_addr_hook) set_sig_addr;
pr_debug("nf_ct_ras: ACF\n");
if (!get_h225_addr(ct, *data, &acf->destCallSignalAddress,
&addr, &port))
return 0;
if (!memcmp(&addr, &ct->tuplehash[dir].tuple.dst.u3, sizeof(addr))) {
set_sig_addr = rcu_dereference(set_sig_addr_hook);
if (set_sig_addr && ct->status & IPS_NAT_MASK)
return set_sig_addr(skb, ct, ctinfo, data,
&acf->destCallSignalAddress, 1);
return 0;
}
if ((exp = nf_ct_expect_alloc(ct)) == NULL)
return -1;
nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, nf_ct_l3num(ct),
&ct->tuplehash[!dir].tuple.src.u3, &addr,
IPPROTO_TCP, NULL, &port);
exp->flags = NF_CT_EXPECT_PERMANENT;
exp->helper = nf_conntrack_helper_q931;
if (nf_ct_expect_related(exp) == 0) {
pr_debug("nf_ct_ras: expect Q.931 ");
nf_ct_dump_tuple(&exp->tuple);
} else
ret = -1;
nf_ct_expect_put(exp);
return ret;
}
