diff options
Diffstat (limited to '')
| -rw-r--r-- | net/netfilter/nf_conntrack_h323_main.c | 270 |
1 files changed, 108 insertions, 162 deletions
diff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c index 2eb31ffb3d14..5a9bce24f3c3 100644 --- a/net/netfilter/nf_conntrack_h323_main.c +++ b/net/netfilter/nf_conntrack_h323_main.c @@ -34,6 +34,8 @@ #include <net/netfilter/nf_conntrack_zones.h> #include <linux/netfilter/nf_conntrack_h323.h> +#define H323_MAX_SIZE 65535 + /* Parameters */ static unsigned int default_rrq_ttl __read_mostly = 300; module_param(default_rrq_ttl, uint, 0600); @@ -49,64 +51,8 @@ MODULE_PARM_DESC(callforward_filter, "only create call forwarding expectations " "if both endpoints are on different sides " "(determined by routing information)"); -/* Hooks for NAT */ -int (*set_h245_addr_hook) (struct sk_buff *skb, unsigned int protoff, - unsigned char **data, int dataoff, - H245_TransportAddress *taddr, - union nf_inet_addr *addr, __be16 port) - __read_mostly; -int (*set_h225_addr_hook) (struct sk_buff *skb, unsigned int protoff, - unsigned char **data, int dataoff, - TransportAddress *taddr, - union nf_inet_addr *addr, __be16 port) - __read_mostly; -int (*set_sig_addr_hook) (struct sk_buff *skb, - struct nf_conn *ct, - enum ip_conntrack_info ctinfo, - unsigned int protoff, unsigned char **data, - TransportAddress *taddr, int count) __read_mostly; -int (*set_ras_addr_hook) (struct sk_buff *skb, - struct nf_conn *ct, - enum ip_conntrack_info ctinfo, - unsigned int protoff, unsigned char **data, - TransportAddress *taddr, int count) __read_mostly; -int (*nat_rtp_rtcp_hook) (struct sk_buff *skb, - struct nf_conn *ct, - enum ip_conntrack_info ctinfo, - unsigned int protoff, - unsigned char **data, int dataoff, - H245_TransportAddress *taddr, - __be16 port, __be16 rtp_port, - struct nf_conntrack_expect *rtp_exp, - struct nf_conntrack_expect *rtcp_exp) __read_mostly; -int (*nat_t120_hook) (struct sk_buff *skb, - struct nf_conn *ct, - enum ip_conntrack_info ctinfo, - unsigned int protoff, - unsigned char **data, int dataoff, - H245_TransportAddress *taddr, __be16 port, - struct nf_conntrack_expect *exp) __read_mostly; -int (*nat_h245_hook) (struct sk_buff *skb, - struct nf_conn *ct, - enum ip_conntrack_info ctinfo, - unsigned int protoff, - unsigned char **data, int dataoff, - TransportAddress *taddr, __be16 port, - struct nf_conntrack_expect *exp) __read_mostly; -int (*nat_callforwarding_hook) (struct sk_buff *skb, - struct nf_conn *ct, - enum ip_conntrack_info ctinfo, - unsigned int protoff, - unsigned char **data, int dataoff, - TransportAddress *taddr, __be16 port, - struct nf_conntrack_expect *exp) __read_mostly; -int (*nat_q931_hook) (struct sk_buff *skb, - struct nf_conn *ct, - enum ip_conntrack_info ctinfo, - unsigned int protoff, - unsigned char **data, TransportAddress *taddr, int idx, - __be16 port, struct nf_conntrack_expect *exp) - __read_mostly; +const struct nfct_h323_nat_hooks __rcu *nfct_h323_nat_hook __read_mostly; +EXPORT_SYMBOL_GPL(nfct_h323_nat_hook); static DEFINE_SPINLOCK(nf_h323_lock); static char *h323_buffer; @@ -142,6 +88,9 @@ static int get_tpkt_data(struct sk_buff *skb, unsigned int protoff, if (tcpdatalen <= 0) /* No TCP data */ goto clear_out; + if (tcpdatalen > H323_MAX_SIZE) + tcpdatalen = H323_MAX_SIZE; + if (*data == NULL) { /* first TPKT */ /* Get first TPKT pointer */ tpkt = skb_header_pointer(skb, tcpdataoff, tcpdatalen, @@ -259,6 +208,7 @@ static int expect_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct, unsigned char **data, int dataoff, H245_TransportAddress *taddr) { + const struct nfct_h323_nat_hooks *nathook; int dir = CTINFO2DIR(ctinfo); int ret = 0; __be16 port; @@ -266,7 +216,6 @@ static int expect_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct, union nf_inet_addr addr; struct nf_conntrack_expect *rtp_exp; struct nf_conntrack_expect *rtcp_exp; - typeof(nat_rtp_rtcp_hook) nat_rtp_rtcp; /* Read RTP or RTCP address */ if (!get_h245_addr(ct, *data, taddr, &addr, &port) || @@ -296,15 +245,16 @@ static int expect_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct, &ct->tuplehash[!dir].tuple.dst.u3, IPPROTO_UDP, NULL, &rtcp_port); + nathook = rcu_dereference(nfct_h323_nat_hook); if (memcmp(&ct->tuplehash[dir].tuple.src.u3, &ct->tuplehash[!dir].tuple.dst.u3, sizeof(ct->tuplehash[dir].tuple.src.u3)) && - (nat_rtp_rtcp = rcu_dereference(nat_rtp_rtcp_hook)) && + nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) { /* NAT needed */ - ret = nat_rtp_rtcp(skb, ct, ctinfo, protoff, data, dataoff, - taddr, port, rtp_port, rtp_exp, rtcp_exp); + ret = nathook->nat_rtp_rtcp(skb, ct, ctinfo, protoff, data, dataoff, + taddr, port, rtp_port, rtp_exp, rtcp_exp); } else { /* Conntrack only */ if (nf_ct_expect_related(rtp_exp, 0) == 0) { if (nf_ct_expect_related(rtcp_exp, 0) == 0) { @@ -333,12 +283,12 @@ static int expect_t120(struct sk_buff *skb, unsigned char **data, int dataoff, H245_TransportAddress *taddr) { + const struct nfct_h323_nat_hooks *nathook; int dir = CTINFO2DIR(ctinfo); int ret = 0; __be16 port; union nf_inet_addr addr; struct nf_conntrack_expect *exp; - typeof(nat_t120_hook) nat_t120; /* Read T.120 address */ if (!get_h245_addr(ct, *data, taddr, &addr, &port) || @@ -355,15 +305,16 @@ static int expect_t120(struct sk_buff *skb, IPPROTO_TCP, NULL, &port); exp->flags = NF_CT_EXPECT_PERMANENT; /* Accept multiple channels */ + nathook = rcu_dereference(nfct_h323_nat_hook); if (memcmp(&ct->tuplehash[dir].tuple.src.u3, &ct->tuplehash[!dir].tuple.dst.u3, sizeof(ct->tuplehash[dir].tuple.src.u3)) && - (nat_t120 = rcu_dereference(nat_t120_hook)) && + nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) { /* NAT needed */ - ret = nat_t120(skb, ct, ctinfo, protoff, data, dataoff, taddr, - port, exp); + ret = nathook->nat_t120(skb, ct, ctinfo, protoff, data, + dataoff, taddr, port, exp); } else { /* Conntrack only */ if (nf_ct_expect_related(exp, 0) == 0) { pr_debug("nf_ct_h323: expect T.120 "); @@ -664,18 +615,19 @@ int get_h225_addr(struct nf_conn *ct, unsigned char *data, return 1; } +EXPORT_SYMBOL_GPL(get_h225_addr); static int expect_h245(struct sk_buff *skb, struct nf_conn *ct, enum ip_conntrack_info ctinfo, unsigned int protoff, unsigned char **data, int dataoff, TransportAddress *taddr) { + const struct nfct_h323_nat_hooks *nathook; int dir = CTINFO2DIR(ctinfo); int ret = 0; __be16 port; union nf_inet_addr addr; struct nf_conntrack_expect *exp; - typeof(nat_h245_hook) nat_h245; /* Read h245Address */ if (!get_h225_addr(ct, *data, taddr, &addr, &port) || @@ -692,15 +644,16 @@ static int expect_h245(struct sk_buff *skb, struct nf_conn *ct, IPPROTO_TCP, NULL, &port); exp->helper = &nf_conntrack_helper_h245; + nathook = rcu_dereference(nfct_h323_nat_hook); if (memcmp(&ct->tuplehash[dir].tuple.src.u3, &ct->tuplehash[!dir].tuple.dst.u3, sizeof(ct->tuplehash[dir].tuple.src.u3)) && - (nat_h245 = rcu_dereference(nat_h245_hook)) && + nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) { /* NAT needed */ - ret = nat_h245(skb, ct, ctinfo, protoff, data, dataoff, taddr, - port, exp); + ret = nathook->nat_h245(skb, ct, ctinfo, protoff, data, + dataoff, taddr, port, exp); } else { /* Conntrack only */ if (nf_ct_expect_related(exp, 0) == 0) { pr_debug("nf_ct_q931: expect H.245 "); @@ -785,13 +738,13 @@ static int expect_callforwarding(struct sk_buff *skb, unsigned char **data, int dataoff, TransportAddress *taddr) { + const struct nfct_h323_nat_hooks *nathook; int dir = CTINFO2DIR(ctinfo); int ret = 0; __be16 port; union nf_inet_addr addr; struct nf_conntrack_expect *exp; struct net *net = nf_ct_net(ct); - typeof(nat_callforwarding_hook) nat_callforwarding; /* Read alternativeAddress */ if (!get_h225_addr(ct, *data, taddr, &addr, &port) || port == 0) @@ -815,16 +768,17 @@ static int expect_callforwarding(struct sk_buff *skb, IPPROTO_TCP, NULL, &port); exp->helper = nf_conntrack_helper_q931; + nathook = rcu_dereference(nfct_h323_nat_hook); if (memcmp(&ct->tuplehash[dir].tuple.src.u3, &ct->tuplehash[!dir].tuple.dst.u3, sizeof(ct->tuplehash[dir].tuple.src.u3)) && - (nat_callforwarding = rcu_dereference(nat_callforwarding_hook)) && + nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) { /* Need NAT */ - ret = nat_callforwarding(skb, ct, ctinfo, - protoff, data, dataoff, - taddr, port, exp); + ret = nathook->nat_callforwarding(skb, ct, ctinfo, + protoff, data, dataoff, + taddr, port, exp); } else { /* Conntrack only */ if (nf_ct_expect_related(exp, 0) == 0) { pr_debug("nf_ct_q931: expect Call Forwarding "); @@ -844,12 +798,12 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct, unsigned char **data, int dataoff, Setup_UUIE *setup) { + const struct nfct_h323_nat_hooks *nathook; int dir = CTINFO2DIR(ctinfo); int ret; int i; __be16 port; union nf_inet_addr addr; - typeof(set_h225_addr_hook) set_h225_addr; pr_debug("nf_ct_q931: Setup\n"); @@ -860,9 +814,9 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct, return -1; } - set_h225_addr = rcu_dereference(set_h225_addr_hook); + nathook = rcu_dereference(nfct_h323_nat_hook); if ((setup->options & eSetup_UUIE_destCallSignalAddress) && - (set_h225_addr) && nf_ct_l3num(ct) == NFPROTO_IPV4 && + nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK && get_h225_addr(ct, *data, &setup->destCallSignalAddress, &addr, &port) && @@ -870,16 +824,16 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct, pr_debug("nf_ct_q931: set destCallSignalAddress %pI6:%hu->%pI6:%hu\n", &addr, ntohs(port), &ct->tuplehash[!dir].tuple.src.u3, ntohs(ct->tuplehash[!dir].tuple.src.u.tcp.port)); - ret = set_h225_addr(skb, protoff, data, dataoff, - &setup->destCallSignalAddress, - &ct->tuplehash[!dir].tuple.src.u3, - ct->tuplehash[!dir].tuple.src.u.tcp.port); + ret = nathook->set_h225_addr(skb, protoff, data, dataoff, + &setup->destCallSignalAddress, + &ct->tuplehash[!dir].tuple.src.u3, + ct->tuplehash[!dir].tuple.src.u.tcp.port); if (ret < 0) return -1; } if ((setup->options & eSetup_UUIE_sourceCallSignalAddress) && - (set_h225_addr) && nf_ct_l3num(ct) == NFPROTO_IPV4 && + nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK && get_h225_addr(ct, *data, &setup->sourceCallSignalAddress, &addr, &port) && @@ -887,10 +841,10 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct, pr_debug("nf_ct_q931: set sourceCallSignalAddress %pI6:%hu->%pI6:%hu\n", &addr, ntohs(port), &ct->tuplehash[!dir].tuple.dst.u3, ntohs(ct->tuplehash[!dir].tuple.dst.u.tcp.port)); - ret = set_h225_addr(skb, protoff, data, dataoff, - &setup->sourceCallSignalAddress, - &ct->tuplehash[!dir].tuple.dst.u3, - ct->tuplehash[!dir].tuple.dst.u.tcp.port); + ret = nathook->set_h225_addr(skb, protoff, data, dataoff, + &setup->sourceCallSignalAddress, + &ct->tuplehash[!dir].tuple.dst.u3, + ct->tuplehash[!dir].tuple.dst.u.tcp.port); if (ret < 0) return -1; } @@ -1220,6 +1174,9 @@ static unsigned char *get_udp_data(struct sk_buff *skb, unsigned int protoff, if (dataoff >= skb->len) return NULL; *datalen = skb->len - dataoff; + if (*datalen > H323_MAX_SIZE) + *datalen = H323_MAX_SIZE; + return skb_header_pointer(skb, dataoff, *datalen, h323_buffer); } @@ -1249,13 +1206,13 @@ static int expect_q931(struct sk_buff *skb, struct nf_conn *ct, TransportAddress *taddr, int count) { struct nf_ct_h323_master *info = nfct_help_data(ct); + const struct nfct_h323_nat_hooks *nathook; int dir = CTINFO2DIR(ctinfo); int ret = 0; int i; __be16 port; union nf_inet_addr addr; struct nf_conntrack_expect *exp; - typeof(nat_q931_hook) nat_q931; /* Look for the first related address */ for (i = 0; i < count; i++) { @@ -1279,11 +1236,11 @@ static int expect_q931(struct sk_buff *skb, struct nf_conn *ct, exp->helper = nf_conntrack_helper_q931; exp->flags = NF_CT_EXPECT_PERMANENT; /* Accept multiple calls */ - nat_q931 = rcu_dereference(nat_q931_hook); - if (nat_q931 && nf_ct_l3num(ct) == NFPROTO_IPV4 && + nathook = rcu_dereference(nfct_h323_nat_hook); + if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) { /* Need NAT */ - ret = nat_q931(skb, ct, ctinfo, protoff, data, - taddr, i, port, exp); + ret = nathook->nat_q931(skb, ct, ctinfo, protoff, data, + taddr, i, port, exp); } else { /* Conntrack only */ if (nf_ct_expect_related(exp, 0) == 0) { pr_debug("nf_ct_ras: expect Q.931 "); @@ -1305,15 +1262,15 @@ static int process_grq(struct sk_buff *skb, struct nf_conn *ct, unsigned int protoff, unsigned char **data, GatekeeperRequest *grq) { - typeof(set_ras_addr_hook) set_ras_addr; + const struct nfct_h323_nat_hooks *nathook; pr_debug("nf_ct_ras: GRQ\n"); - set_ras_addr = rcu_dereference(set_ras_addr_hook); - if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 && + nathook = rcu_dereference(nfct_h323_nat_hook); + if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) /* NATed */ - return set_ras_addr(skb, ct, ctinfo, protoff, data, - &grq->rasAddress, 1); + return nathook->set_ras_addr(skb, ct, ctinfo, protoff, data, + &grq->rasAddress, 1); return 0; } @@ -1367,8 +1324,8 @@ static int process_rrq(struct sk_buff *skb, struct nf_conn *ct, unsigned char **data, RegistrationRequest *rrq) { struct nf_ct_h323_master *info = nfct_help_data(ct); + const struct nfct_h323_nat_hooks *nathook; int ret; - typeof(set_ras_addr_hook) set_ras_addr; pr_debug("nf_ct_ras: RRQ\n"); @@ -1378,12 +1335,12 @@ static int process_rrq(struct sk_buff *skb, struct nf_conn *ct, if (ret < 0) return -1; - set_ras_addr = rcu_dereference(set_ras_addr_hook); - if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 && + nathook = rcu_dereference(nfct_h323_nat_hook); + if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) { - ret = set_ras_addr(skb, ct, ctinfo, protoff, data, - rrq->rasAddress.item, - rrq->rasAddress.count); + ret = nathook->set_ras_addr(skb, ct, ctinfo, protoff, data, + rrq->rasAddress.item, + rrq->rasAddress.count); if (ret < 0) return -1; } @@ -1403,19 +1360,19 @@ static int process_rcf(struct sk_buff *skb, struct nf_conn *ct, unsigned char **data, RegistrationConfirm *rcf) { struct nf_ct_h323_master *info = nfct_help_data(ct); + const struct nfct_h323_nat_hooks *nathook; 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"); - set_sig_addr = rcu_dereference(set_sig_addr_hook); - if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 && + nathook = rcu_dereference(nfct_h323_nat_hook); + if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) { - ret = set_sig_addr(skb, ct, ctinfo, protoff, data, - rcf->callSignalAddress.item, - rcf->callSignalAddress.count); + ret = nathook->set_sig_addr(skb, ct, ctinfo, protoff, data, + rcf->callSignalAddress.item, + rcf->callSignalAddress.count); if (ret < 0) return -1; } @@ -1454,18 +1411,18 @@ static int process_urq(struct sk_buff *skb, struct nf_conn *ct, unsigned char **data, UnregistrationRequest *urq) { struct nf_ct_h323_master *info = nfct_help_data(ct); + const struct nfct_h323_nat_hooks *nathook; 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 && nf_ct_l3num(ct) == NFPROTO_IPV4 && + nathook = rcu_dereference(nfct_h323_nat_hook); + if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) { - ret = set_sig_addr(skb, ct, ctinfo, protoff, data, - urq->callSignalAddress.item, - urq->callSignalAddress.count); + ret = nathook->set_sig_addr(skb, ct, ctinfo, protoff, data, + urq->callSignalAddress.item, + urq->callSignalAddress.count); if (ret < 0) return -1; } @@ -1487,39 +1444,42 @@ static int process_arq(struct sk_buff *skb, struct nf_conn *ct, unsigned char **data, AdmissionRequest *arq) { const struct nf_ct_h323_master *info = nfct_help_data(ct); + const struct nfct_h323_nat_hooks *nathook; int dir = CTINFO2DIR(ctinfo); __be16 port; union nf_inet_addr addr; - typeof(set_h225_addr_hook) set_h225_addr; pr_debug("nf_ct_ras: ARQ\n"); - set_h225_addr = rcu_dereference(set_h225_addr_hook); + nathook = rcu_dereference(nfct_h323_nat_hook); + if (!nathook) + return 0; + if ((arq->options & eAdmissionRequest_destCallSignalAddress) && get_h225_addr(ct, *data, &arq->destCallSignalAddress, &addr, &port) && !memcmp(&addr, &ct->tuplehash[dir].tuple.src.u3, sizeof(addr)) && port == info->sig_port[dir] && nf_ct_l3num(ct) == NFPROTO_IPV4 && - set_h225_addr && ct->status & IPS_NAT_MASK) { + ct->status & IPS_NAT_MASK) { /* Answering ARQ */ - return set_h225_addr(skb, protoff, data, 0, - &arq->destCallSignalAddress, - &ct->tuplehash[!dir].tuple.dst.u3, - info->sig_port[!dir]); + return nathook->set_h225_addr(skb, protoff, data, 0, + &arq->destCallSignalAddress, + &ct->tuplehash[!dir].tuple.dst.u3, + info->sig_port[!dir]); } if ((arq->options & eAdmissionRequest_srcCallSignalAddress) && get_h225_addr(ct, *data, &arq->srcCallSignalAddress, &addr, &port) && !memcmp(&addr, &ct->tuplehash[dir].tuple.src.u3, sizeof(addr)) && - set_h225_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 && + nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) { /* Calling ARQ */ - return set_h225_addr(skb, protoff, data, 0, - &arq->srcCallSignalAddress, - &ct->tuplehash[!dir].tuple.dst.u3, - port); + return nathook->set_h225_addr(skb, protoff, data, 0, + &arq->srcCallSignalAddress, + &ct->tuplehash[!dir].tuple.dst.u3, + port); } return 0; @@ -1535,7 +1495,6 @@ static int process_acf(struct sk_buff *skb, struct nf_conn *ct, __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"); @@ -1544,12 +1503,15 @@ static int process_acf(struct sk_buff *skb, struct nf_conn *ct, return 0; if (!memcmp(&addr, &ct->tuplehash[dir].tuple.dst.u3, sizeof(addr))) { + const struct nfct_h323_nat_hooks *nathook; + /* Answering ACF */ - set_sig_addr = rcu_dereference(set_sig_addr_hook); - if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 && + nathook = rcu_dereference(nfct_h323_nat_hook); + if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) - return set_sig_addr(skb, ct, ctinfo, protoff, data, - &acf->destCallSignalAddress, 1); + return nathook->set_sig_addr(skb, ct, ctinfo, protoff, + data, + &acf->destCallSignalAddress, 1); return 0; } @@ -1578,15 +1540,15 @@ static int process_lrq(struct sk_buff *skb, struct nf_conn *ct, unsigned int protoff, unsigned char **data, LocationRequest *lrq) { - typeof(set_ras_addr_hook) set_ras_addr; + const struct nfct_h323_nat_hooks *nathook; pr_debug("nf_ct_ras: LRQ\n"); - set_ras_addr = rcu_dereference(set_ras_addr_hook); - if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 && + nathook = rcu_dereference(nfct_h323_nat_hook); + if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) - return set_ras_addr(skb, ct, ctinfo, protoff, data, - &lrq->replyAddress, 1); + return nathook->set_ras_addr(skb, ct, ctinfo, protoff, data, + &lrq->replyAddress, 1); return 0; } @@ -1634,27 +1596,22 @@ static int process_irr(struct sk_buff *skb, struct nf_conn *ct, unsigned int protoff, unsigned char **data, InfoRequestResponse *irr) { + const struct nfct_h323_nat_hooks *nathook; 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 && nf_ct_l3num(ct) == NFPROTO_IPV4 && + nathook = rcu_dereference(nfct_h323_nat_hook); + if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) { - ret = set_ras_addr(skb, ct, ctinfo, protoff, data, - &irr->rasAddress, 1); + ret = nathook->set_ras_addr(skb, ct, ctinfo, protoff, data, + &irr->rasAddress, 1); if (ret < 0) return -1; - } - set_sig_addr = rcu_dereference(set_sig_addr_hook); - if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 && - ct->status & IPS_NAT_MASK) { - ret = set_sig_addr(skb, ct, ctinfo, protoff, data, - irr->callSignalAddress.item, - irr->callSignalAddress.count); + ret = nathook->set_sig_addr(skb, ct, ctinfo, protoff, data, + irr->callSignalAddress.item, + irr->callSignalAddress.count); if (ret < 0) return -1; } @@ -1821,7 +1778,7 @@ static int __init nf_conntrack_h323_init(void) NF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_h323_master)); - h323_buffer = kmalloc(65536, GFP_KERNEL); + h323_buffer = kmalloc(H323_MAX_SIZE + 1, GFP_KERNEL); if (!h323_buffer) return -ENOMEM; ret = h323_helper_init(); @@ -1837,17 +1794,6 @@ err1: module_init(nf_conntrack_h323_init); module_exit(nf_conntrack_h323_fini); -EXPORT_SYMBOL_GPL(get_h225_addr); -EXPORT_SYMBOL_GPL(set_h245_addr_hook); -EXPORT_SYMBOL_GPL(set_h225_addr_hook); -EXPORT_SYMBOL_GPL(set_sig_addr_hook); -EXPORT_SYMBOL_GPL(set_ras_addr_hook); -EXPORT_SYMBOL_GPL(nat_rtp_rtcp_hook); -EXPORT_SYMBOL_GPL(nat_t120_hook); -EXPORT_SYMBOL_GPL(nat_h245_hook); -EXPORT_SYMBOL_GPL(nat_callforwarding_hook); -EXPORT_SYMBOL_GPL(nat_q931_hook); - MODULE_AUTHOR("Jing Min Zhao <zhaojingmin@users.sourceforge.net>"); MODULE_DESCRIPTION("H.323 connection tracking helper"); MODULE_LICENSE("GPL"); |