X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;ds=sidebyside;f=net%2Fbridge%2Fbr_netfilter.c;h=8245f051ccbbcb63f95755f663c1503f0cc954b9;hb=f26e51f67ae6a75ffc57b96cf5fe096f75e778cb;hp=9b2986b182ba0a7630ac30d0b3305d9fd6cc89b1;hpb=afc2e82c0851317931a9bfdb98271253371825c6;p=powerpc.git

diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index 9b2986b182..8245f051cc 100644
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -142,14 +142,33 @@ static inline struct nf_bridge_info *nf_bridge_alloc(struct sk_buff *skb)
 	return skb->nf_bridge;
 }
 
-static inline void nf_bridge_save_header(struct sk_buff *skb)
+static inline void nf_bridge_push_encap_header(struct sk_buff *skb)
+{
+	unsigned int len = nf_bridge_encap_header_len(skb);
+
+	skb_push(skb, len);
+	skb->network_header -= len;
+}
+
+static inline void nf_bridge_pull_encap_header(struct sk_buff *skb)
+{
+	unsigned int len = nf_bridge_encap_header_len(skb);
+
+	skb_pull(skb, len);
+	skb->network_header += len;
+}
+
+static inline void nf_bridge_pull_encap_header_rcsum(struct sk_buff *skb)
 {
-	int header_size = ETH_HLEN;
+	unsigned int len = nf_bridge_encap_header_len(skb);
+
+	skb_pull_rcsum(skb, len);
+	skb->network_header += len;
+}
 
-	if (skb->protocol == htons(ETH_P_8021Q))
-		header_size += VLAN_HLEN;
-	else if (skb->protocol == htons(ETH_P_PPP_SES))
-		header_size += PPPOE_SES_HLEN;
+static inline void nf_bridge_save_header(struct sk_buff *skb)
+{
+	int header_size = ETH_HLEN + nf_bridge_encap_header_len(skb);
 
 	skb_copy_from_linear_data_offset(skb, -header_size,
 					 skb->nf_bridge->data, header_size);
@@ -162,24 +181,15 @@ static inline void nf_bridge_save_header(struct sk_buff *skb)
 int nf_bridge_copy_header(struct sk_buff *skb)
 {
 	int err;
-	int header_size = ETH_HLEN;
-
-	if (skb->protocol == htons(ETH_P_8021Q))
-		header_size += VLAN_HLEN;
-	else if (skb->protocol == htons(ETH_P_PPP_SES))
-		header_size += PPPOE_SES_HLEN;
+	int header_size = ETH_HLEN + nf_bridge_encap_header_len(skb);
 
-	err = skb_cow(skb, header_size);
+	err = skb_cow_head(skb, header_size);
 	if (err)
 		return err;
 
 	skb_copy_to_linear_data_offset(skb, -header_size,
 				       skb->nf_bridge->data, header_size);
-
-	if (skb->protocol == htons(ETH_P_8021Q))
-		__skb_push(skb, VLAN_HLEN);
-	else if (skb->protocol == htons(ETH_P_PPP_SES))
-		__skb_push(skb, PPPOE_SES_HLEN);
+	__skb_push(skb, nf_bridge_encap_header_len(skb));
 	return 0;
 }
 
@@ -200,13 +210,7 @@ static int br_nf_pre_routing_finish_ipv6(struct sk_buff *skb)
 	dst_hold(skb->dst);
 
 	skb->dev = nf_bridge->physindev;
-	if (skb->protocol == htons(ETH_P_8021Q)) {
-		skb_push(skb, VLAN_HLEN);
-		skb->network_header -= VLAN_HLEN;
-	} else if (skb->protocol == htons(ETH_P_PPP_SES)) {
-		skb_push(skb, PPPOE_SES_HLEN);
-		skb->network_header -= PPPOE_SES_HLEN;
-	}
+	nf_bridge_push_encap_header(skb);
 	NF_HOOK_THRESH(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
 		       br_handle_frame_finish, 1);
 
@@ -284,13 +288,7 @@ static int br_nf_pre_routing_finish_bridge(struct sk_buff *skb)
 	if (!skb->dev)
 		kfree_skb(skb);
 	else {
-		if (skb->protocol == htons(ETH_P_8021Q)) {
-			skb_pull(skb, VLAN_HLEN);
-			skb->network_header += VLAN_HLEN;
-		} else if (skb->protocol == htons(ETH_P_PPP_SES)) {
-			skb_pull(skb, PPPOE_SES_HLEN);
-			skb->network_header += PPPOE_SES_HLEN;
-		}
+		nf_bridge_pull_encap_header(skb);
 		skb->dst->output(skb);
 	}
 	return 0;
@@ -356,15 +354,7 @@ bridged_dnat:
 				 * bridged frame */
 				nf_bridge->mask |= BRNF_BRIDGED_DNAT;
 				skb->dev = nf_bridge->physindev;
-				if (skb->protocol ==
-				    htons(ETH_P_8021Q)) {
-					skb_push(skb, VLAN_HLEN);
-					skb->network_header -= VLAN_HLEN;
-				} else if(skb->protocol ==
-				    htons(ETH_P_PPP_SES)) {
-					skb_push(skb, PPPOE_SES_HLEN);
-					skb->network_header -= PPPOE_SES_HLEN;
-				}
+				nf_bridge_push_encap_header(skb);
 				NF_HOOK_THRESH(PF_BRIDGE, NF_BR_PRE_ROUTING,
 					       skb, skb->dev, NULL,
 					       br_nf_pre_routing_finish_bridge,
@@ -380,13 +370,7 @@ bridged_dnat:
 	}
 
 	skb->dev = nf_bridge->physindev;
-	if (skb->protocol == htons(ETH_P_8021Q)) {
-		skb_push(skb, VLAN_HLEN);
-		skb->network_header -= VLAN_HLEN;
-	} else if (skb->protocol == htons(ETH_P_PPP_SES)) {
-		skb_push(skb, PPPOE_SES_HLEN);
-		skb->network_header -= PPPOE_SES_HLEN;
-	}
+	nf_bridge_push_encap_header(skb);
 	NF_HOOK_THRESH(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
 		       br_handle_frame_finish, 1);
 
@@ -525,8 +509,14 @@ static unsigned int br_nf_pre_routing(unsigned int hook, struct sk_buff **pskb,
 				      int (*okfn)(struct sk_buff *))
 {
 	struct iphdr *iph;
-	__u32 len;
 	struct sk_buff *skb = *pskb;
+	__u32 len = nf_bridge_encap_header_len(skb);
+
+	if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
+		return NF_STOLEN;
+
+	if (unlikely(!pskb_may_pull(skb, len)))
+		goto out;
 
 	if (skb->protocol == htons(ETH_P_IPV6) || IS_VLAN_IPV6(skb) ||
 	    IS_PPPOE_IPV6(skb)) {
@@ -534,16 +524,7 @@ static unsigned int br_nf_pre_routing(unsigned int hook, struct sk_buff **pskb,
 		if (!brnf_call_ip6tables)
 			return NF_ACCEPT;
 #endif
-		if ((skb = skb_share_check(*pskb, GFP_ATOMIC)) == NULL)
-			goto out;
-
-		if (skb->protocol == htons(ETH_P_8021Q)) {
-			skb_pull_rcsum(skb, VLAN_HLEN);
-			skb->network_header += VLAN_HLEN;
-		} else if (skb->protocol == htons(ETH_P_PPP_SES)) {
-			skb_pull_rcsum(skb, PPPOE_SES_HLEN);
-			skb->network_header += PPPOE_SES_HLEN;
-		}
+		nf_bridge_pull_encap_header_rcsum(skb);
 		return br_nf_pre_routing_ipv6(hook, skb, in, out, okfn);
 	}
 #ifdef CONFIG_SYSCTL
@@ -555,16 +536,7 @@ static unsigned int br_nf_pre_routing(unsigned int hook, struct sk_buff **pskb,
 	    !IS_PPPOE_IP(skb))
 		return NF_ACCEPT;
 
-	if ((skb = skb_share_check(*pskb, GFP_ATOMIC)) == NULL)
-		goto out;
-
-	if (skb->protocol == htons(ETH_P_8021Q)) {
-		skb_pull_rcsum(skb, VLAN_HLEN);
-		skb->network_header += VLAN_HLEN;
-	} else if (skb->protocol == htons(ETH_P_PPP_SES)) {
-		skb_pull_rcsum(skb, PPPOE_SES_HLEN);
-		skb->network_header += PPPOE_SES_HLEN;
-	}
+	nf_bridge_pull_encap_header_rcsum(skb);
 
 	if (!pskb_may_pull(skb, sizeof(struct iphdr)))
 		goto inhdr_error;
@@ -642,13 +614,7 @@ static int br_nf_forward_finish(struct sk_buff *skb)
 	} else {
 		in = *((struct net_device **)(skb->cb));
 	}
-	if (skb->protocol == htons(ETH_P_8021Q)) {
-		skb_push(skb, VLAN_HLEN);
-		skb->network_header -= VLAN_HLEN;
-	} else if (skb->protocol == htons(ETH_P_PPP_SES)) {
-		skb_push(skb, PPPOE_SES_HLEN);
-		skb->network_header -= PPPOE_SES_HLEN;
-	}
+	nf_bridge_push_encap_header(skb);
 	NF_HOOK_THRESH(PF_BRIDGE, NF_BR_FORWARD, skb, in,
 		       skb->dev, br_forward_finish, 1);
 	return 0;
@@ -682,13 +648,7 @@ static unsigned int br_nf_forward_ip(unsigned int hook, struct sk_buff **pskb,
 	else
 		pf = PF_INET6;
 
-	if (skb->protocol == htons(ETH_P_8021Q)) {
-		skb_pull(*pskb, VLAN_HLEN);
-		(*pskb)->network_header += VLAN_HLEN;
-	} else if (skb->protocol == htons(ETH_P_PPP_SES)) {
-		skb_pull(*pskb, PPPOE_SES_HLEN);
-		(*pskb)->network_header += PPPOE_SES_HLEN;
-	}
+	nf_bridge_pull_encap_header(*pskb);
 
 	nf_bridge = skb->nf_bridge;
 	if (skb->pkt_type == PACKET_OTHERHOST) {
@@ -722,15 +682,12 @@ static unsigned int br_nf_forward_arp(unsigned int hook, struct sk_buff **pskb,
 	if (skb->protocol != htons(ETH_P_ARP)) {
 		if (!IS_VLAN_ARP(skb))
 			return NF_ACCEPT;
-		skb_pull(*pskb, VLAN_HLEN);
-		(*pskb)->network_header += VLAN_HLEN;
+		nf_bridge_pull_encap_header(*pskb);
 	}
 
 	if (arp_hdr(skb)->ar_pln != 4) {
-		if (IS_VLAN_ARP(skb)) {
-			skb_push(*pskb, VLAN_HLEN);
-			(*pskb)->network_header -= VLAN_HLEN;
-		}
+		if (IS_VLAN_ARP(skb))
+			nf_bridge_push_encap_header(*pskb);
 		return NF_ACCEPT;
 	}
 	*d = (struct net_device *)in;
@@ -777,13 +734,7 @@ static unsigned int br_nf_local_out(unsigned int hook, struct sk_buff **pskb,
 		skb->pkt_type = PACKET_OTHERHOST;
 		nf_bridge->mask ^= BRNF_PKT_TYPE;
 	}
-	if (skb->protocol == htons(ETH_P_8021Q)) {
-		skb_push(skb, VLAN_HLEN);
-		skb->network_header -= VLAN_HLEN;
-	} else if (skb->protocol == htons(ETH_P_PPP_SES)) {
-		skb_push(skb, PPPOE_SES_HLEN);
-		skb->network_header -= PPPOE_SES_HLEN;
-	}
+	nf_bridge_push_encap_header(skb);
 
 	NF_HOOK(PF_BRIDGE, NF_BR_FORWARD, skb, realindev, skb->dev,
 		br_forward_finish);
@@ -848,14 +799,7 @@ static unsigned int br_nf_post_routing(unsigned int hook, struct sk_buff **pskb,
 		nf_bridge->mask |= BRNF_PKT_TYPE;
 	}
 
-	if (skb->protocol == htons(ETH_P_8021Q)) {
-		skb_pull(skb, VLAN_HLEN);
-		skb->network_header += VLAN_HLEN;
-	} else if (skb->protocol == htons(ETH_P_PPP_SES)) {
-		skb_pull(skb, PPPOE_SES_HLEN);
-		skb->network_header += PPPOE_SES_HLEN;
-	}
-
+	nf_bridge_pull_encap_header(skb);
 	nf_bridge_save_header(skb);
 
 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
@@ -960,7 +904,6 @@ int brnf_sysctl_call_tables(ctl_table * ctl, int write, struct file *filp,
 
 static ctl_table brnf_table[] = {
 	{
-		.ctl_name	= NET_BRIDGE_NF_CALL_ARPTABLES,
 		.procname	= "bridge-nf-call-arptables",
 		.data		= &brnf_call_arptables,
 		.maxlen		= sizeof(int),
@@ -968,7 +911,6 @@ static ctl_table brnf_table[] = {
 		.proc_handler	= &brnf_sysctl_call_tables,
 	},
 	{
-		.ctl_name	= NET_BRIDGE_NF_CALL_IPTABLES,
 		.procname	= "bridge-nf-call-iptables",
 		.data		= &brnf_call_iptables,
 		.maxlen		= sizeof(int),
@@ -976,7 +918,6 @@ static ctl_table brnf_table[] = {
 		.proc_handler	= &brnf_sysctl_call_tables,
 	},
 	{
-		.ctl_name	= NET_BRIDGE_NF_CALL_IP6TABLES,
 		.procname	= "bridge-nf-call-ip6tables",
 		.data		= &brnf_call_ip6tables,
 		.maxlen		= sizeof(int),
@@ -984,7 +925,6 @@ static ctl_table brnf_table[] = {
 		.proc_handler	= &brnf_sysctl_call_tables,
 	},
 	{
-		.ctl_name	= NET_BRIDGE_NF_FILTER_VLAN_TAGGED,
 		.procname	= "bridge-nf-filter-vlan-tagged",
 		.data		= &brnf_filter_vlan_tagged,
 		.maxlen		= sizeof(int),
@@ -992,7 +932,6 @@ static ctl_table brnf_table[] = {
 		.proc_handler	= &brnf_sysctl_call_tables,
 	},
 	{
-		.ctl_name	= NET_BRIDGE_NF_FILTER_PPPOE_TAGGED,
 		.procname	= "bridge-nf-filter-pppoe-tagged",
 		.data		= &brnf_filter_pppoe_tagged,
 		.maxlen		= sizeof(int),