#include <linux/ip.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
+#include <linux/if_arp.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/netfilter_bridge.h>
#include <linux/netfilter_ipv6.h>
#include <linux/netfilter_arp.h>
#include <linux/in_route.h>
+
#include <net/ip.h>
#include <net/ipv6.h>
+#include <net/route.h>
+
#include <asm/uaccess.h>
#include <asm/checksum.h>
#include "br_private.h"
#define store_orig_dstaddr(skb) (skb_origaddr(skb) = (skb)->nh.iph->daddr)
#define dnat_took_place(skb) (skb_origaddr(skb) != (skb)->nh.iph->daddr)
-#define has_bridge_parent(device) ((device)->br_port != NULL)
-#define bridge_parent(device) ((device)->br_port->br->dev)
-
#ifdef CONFIG_SYSCTL
static struct ctl_table_header *brnf_sysctl_header;
static int brnf_call_iptables = 1;
#define brnf_filter_vlan_tagged 1
#endif
-#define IS_VLAN_IP (skb->protocol == __constant_htons(ETH_P_8021Q) && \
- hdr->h_vlan_encapsulated_proto == __constant_htons(ETH_P_IP) && \
- brnf_filter_vlan_tagged)
-#define IS_VLAN_IPV6 (skb->protocol == __constant_htons(ETH_P_8021Q) && \
- hdr->h_vlan_encapsulated_proto == __constant_htons(ETH_P_IPV6) && \
- brnf_filter_vlan_tagged)
-#define IS_VLAN_ARP (skb->protocol == __constant_htons(ETH_P_8021Q) && \
- hdr->h_vlan_encapsulated_proto == __constant_htons(ETH_P_ARP) && \
- brnf_filter_vlan_tagged)
+static __be16 inline vlan_proto(const struct sk_buff *skb)
+{
+ return vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
+}
+
+#define IS_VLAN_IP(skb) \
+ (skb->protocol == htons(ETH_P_8021Q) && \
+ vlan_proto(skb) == htons(ETH_P_IP) && \
+ brnf_filter_vlan_tagged)
+
+#define IS_VLAN_IPV6(skb) \
+ (skb->protocol == htons(ETH_P_8021Q) && \
+ vlan_proto(skb) == htons(ETH_P_IPV6) &&\
+ brnf_filter_vlan_tagged)
+
+#define IS_VLAN_ARP(skb) \
+ (skb->protocol == htons(ETH_P_8021Q) && \
+ vlan_proto(skb) == htons(ETH_P_ARP) && \
+ brnf_filter_vlan_tagged)
/* We need these fake structures to make netfilter happy --
* lots of places assume that skb->dst != NULL, which isn't
.dev = &__fake_net_device,
.path = &__fake_rtable.u.dst,
.metrics = {[RTAX_MTU - 1] = 1500},
+ .flags = DST_NOXFRM,
}
},
.rt_flags = 0,
};
+static inline struct net_device *bridge_parent(const struct net_device *dev)
+{
+ struct net_bridge_port *port = rcu_dereference(dev->br_port);
+
+ return port ? port->br->dev : NULL;
+}
+
+static inline struct nf_bridge_info *nf_bridge_alloc(struct sk_buff *skb)
+{
+ skb->nf_bridge = kzalloc(sizeof(struct nf_bridge_info), GFP_ATOMIC);
+ if (likely(skb->nf_bridge))
+ atomic_set(&(skb->nf_bridge->use), 1);
+
+ return skb->nf_bridge;
+}
+
+static inline void nf_bridge_save_header(struct sk_buff *skb)
+{
+ int header_size = 16;
+
+ if (skb->protocol == htons(ETH_P_8021Q))
+ header_size = 18;
+
+ memcpy(skb->nf_bridge->data, skb->data - header_size, header_size);
+}
/* PF_BRIDGE/PRE_ROUTING *********************************************/
/* Undo the changes made for ip6tables PREROUTING and continue the
{
struct nf_bridge_info *nf_bridge = skb->nf_bridge;
-#ifdef CONFIG_NETFILTER_DEBUG
- skb->nf_debug ^= (1 << NF_BR_PRE_ROUTING);
-#endif
-
if (nf_bridge->mask & BRNF_PKT_TYPE) {
skb->pkt_type = PACKET_OTHERHOST;
nf_bridge->mask ^= BRNF_PKT_TYPE;
dst_hold(skb->dst);
skb->dev = nf_bridge->physindev;
- if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ if (skb->protocol == htons(ETH_P_8021Q)) {
skb_push(skb, VLAN_HLEN);
skb->nh.raw -= VLAN_HLEN;
}
if (jiffies - last_complaint >= 5 * HZ) {
printk(KERN_WARNING "Performing cross-bridge DNAT requires IP "
- "forwarding to be enabled\n");
+ "forwarding to be enabled\n");
last_complaint = jiffies;
}
}
* --Bart, 20021007 (updated) */
static int br_nf_pre_routing_finish_bridge(struct sk_buff *skb)
{
-#ifdef CONFIG_NETFILTER_DEBUG
- skb->nf_debug |= (1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_FORWARD);
-#endif
-
if (skb->pkt_type == PACKET_OTHERHOST) {
skb->pkt_type = PACKET_HOST;
skb->nf_bridge->mask |= BRNF_PKT_TYPE;
skb->nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
skb->dev = bridge_parent(skb->dev);
- if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
- skb_pull(skb, VLAN_HLEN);
- skb->nh.raw += VLAN_HLEN;
+ if (!skb->dev)
+ kfree_skb(skb);
+ else {
+ if (skb->protocol == htons(ETH_P_8021Q)) {
+ skb_pull(skb, VLAN_HLEN);
+ skb->nh.raw += VLAN_HLEN;
+ }
+ skb->dst->output(skb);
}
- skb->dst->output(skb);
return 0;
}
struct iphdr *iph = skb->nh.iph;
struct nf_bridge_info *nf_bridge = skb->nf_bridge;
-#ifdef CONFIG_NETFILTER_DEBUG
- skb->nf_debug ^= (1 << NF_BR_PRE_ROUTING);
-#endif
-
if (nf_bridge->mask & BRNF_PKT_TYPE) {
skb->pkt_type = PACKET_OTHERHOST;
nf_bridge->mask ^= BRNF_PKT_TYPE;
nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
if (dnat_took_place(skb)) {
- if (ip_route_input(skb, iph->daddr, iph->saddr, iph->tos,
- dev)) {
+ if (ip_route_input(skb, iph->daddr, iph->saddr, iph->tos, dev)) {
struct rtable *rt;
- struct flowi fl = { .nl_u =
- { .ip4_u = { .daddr = iph->daddr, .saddr = 0 ,
- .tos = RT_TOS(iph->tos)} }, .proto = 0};
+ struct flowi fl = {
+ .nl_u = {
+ .ip4_u = {
+ .daddr = iph->daddr,
+ .saddr = 0,
+ .tos = RT_TOS(iph->tos) },
+ },
+ .proto = 0,
+ };
if (!ip_route_output_key(&rt, &fl)) {
- /* Bridged-and-DNAT'ed traffic doesn't
- * require ip_forwarding. */
- if (((struct dst_entry *)rt)->dev == dev) {
+ /* - Bridged-and-DNAT'ed traffic doesn't
+ * require ip_forwarding.
+ * - Deal with redirected traffic. */
+ if (((struct dst_entry *)rt)->dev == dev ||
+ rt->rt_type == RTN_LOCAL) {
skb->dst = (struct dst_entry *)rt;
goto bridged_dnat;
}
nf_bridge->mask |= BRNF_BRIDGED_DNAT;
skb->dev = nf_bridge->physindev;
if (skb->protocol ==
- __constant_htons(ETH_P_8021Q)) {
+ htons(ETH_P_8021Q)) {
skb_push(skb, VLAN_HLEN);
skb->nh.raw -= VLAN_HLEN;
}
1);
return 0;
}
- memcpy(eth_hdr(skb)->h_dest, dev->dev_addr,
- ETH_ALEN);
+ memcpy(eth_hdr(skb)->h_dest, dev->dev_addr, ETH_ALEN);
skb->pkt_type = PACKET_HOST;
}
} else {
}
skb->dev = nf_bridge->physindev;
- if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ if (skb->protocol == htons(ETH_P_8021Q)) {
skb_push(skb, VLAN_HLEN);
skb->nh.raw -= VLAN_HLEN;
}
}
/* Some common code for IPv4/IPv6 */
-static void setup_pre_routing(struct sk_buff *skb)
+static struct net_device *setup_pre_routing(struct sk_buff *skb)
{
struct nf_bridge_info *nf_bridge = skb->nf_bridge;
nf_bridge->mask |= BRNF_NF_BRIDGE_PREROUTING;
nf_bridge->physindev = skb->dev;
skb->dev = bridge_parent(skb->dev);
+
+ return skb->dev;
}
/* We only check the length. A bridge shouldn't do any hop-by-hop stuff anyway */
static int check_hbh_len(struct sk_buff *skb)
{
- unsigned char *raw = (u8*)(skb->nh.ipv6h+1);
+ unsigned char *raw = (u8 *) (skb->nh.ipv6h + 1);
u32 pkt_len;
int off = raw - skb->nh.raw;
- int len = (raw[1]+1)<<3;
+ int len = (raw[1] + 1) << 3;
if ((raw + len) - skb->data > skb_headlen(skb))
goto bad;
len -= 2;
while (len > 0) {
- int optlen = raw[off+1]+2;
+ int optlen = skb->nh.raw[off + 1] + 2;
switch (skb->nh.raw[off]) {
case IPV6_TLV_PAD0:
break;
case IPV6_TLV_JUMBO:
- if (skb->nh.raw[off+1] != 4 || (off&3) != 2)
+ if (skb->nh.raw[off + 1] != 4 || (off & 3) != 2)
+ goto bad;
+ pkt_len = ntohl(*(u32 *) (skb->nh.raw + off + 2));
+ if (pkt_len <= IPV6_MAXPLEN ||
+ skb->nh.ipv6h->payload_len)
goto bad;
-
- pkt_len = ntohl(*(u32*)(skb->nh.raw+off+2));
-
if (pkt_len > skb->len - sizeof(struct ipv6hdr))
goto bad;
- if (pkt_len + sizeof(struct ipv6hdr) < skb->len) {
- if (__pskb_trim(skb,
- pkt_len + sizeof(struct ipv6hdr)))
- goto bad;
- if (skb->ip_summed == CHECKSUM_HW)
- skb->ip_summed = CHECKSUM_NONE;
- }
+ if (pskb_trim_rcsum(skb,
+ pkt_len + sizeof(struct ipv6hdr)))
+ goto bad;
break;
default:
if (optlen > len)
/* Replicate the checks that IPv6 does on packet reception and pass the packet
* to ip6tables, which doesn't support NAT, so things are fairly simple. */
static unsigned int br_nf_pre_routing_ipv6(unsigned int hook,
- struct sk_buff *skb, const struct net_device *in,
- const struct net_device *out, int (*okfn)(struct sk_buff *))
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
{
struct ipv6hdr *hdr;
u32 pkt_len;
- struct nf_bridge_info *nf_bridge;
if (skb->len < sizeof(struct ipv6hdr))
goto inhdr_error;
}
}
if (hdr->nexthdr == NEXTHDR_HOP && check_hbh_len(skb))
- goto inhdr_error;
+ goto inhdr_error;
-#ifdef CONFIG_NETFILTER_DEBUG
- skb->nf_debug ^= (1 << NF_IP6_PRE_ROUTING);
-#endif
- if ((nf_bridge = nf_bridge_alloc(skb)) == NULL)
+ nf_bridge_put(skb->nf_bridge);
+ if (!nf_bridge_alloc(skb))
+ return NF_DROP;
+ if (!setup_pre_routing(skb))
return NF_DROP;
- setup_pre_routing(skb);
NF_HOOK(PF_INET6, NF_IP6_PRE_ROUTING, skb, skb->dev, NULL,
br_nf_pre_routing_finish_ipv6);
* target in particular. Save the original destination IP
* address to be able to detect DNAT afterwards. */
static unsigned int br_nf_pre_routing(unsigned int hook, struct sk_buff **pskb,
- const struct net_device *in, const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
{
struct iphdr *iph;
__u32 len;
struct sk_buff *skb = *pskb;
- struct nf_bridge_info *nf_bridge;
- struct vlan_ethhdr *hdr = vlan_eth_hdr(*pskb);
- if (skb->protocol == __constant_htons(ETH_P_IPV6) || IS_VLAN_IPV6) {
+ if (skb->protocol == htons(ETH_P_IPV6) || IS_VLAN_IPV6(skb)) {
#ifdef CONFIG_SYSCTL
if (!brnf_call_ip6tables)
return NF_ACCEPT;
if ((skb = skb_share_check(*pskb, GFP_ATOMIC)) == NULL)
goto out;
- if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
- skb_pull(skb, VLAN_HLEN);
- (skb)->nh.raw += VLAN_HLEN;
+ if (skb->protocol == htons(ETH_P_8021Q)) {
+ skb_pull_rcsum(skb, VLAN_HLEN);
+ skb->nh.raw += VLAN_HLEN;
}
return br_nf_pre_routing_ipv6(hook, skb, in, out, okfn);
}
return NF_ACCEPT;
#endif
- if (skb->protocol != __constant_htons(ETH_P_IP) && !IS_VLAN_IP)
+ if (skb->protocol != htons(ETH_P_IP) && !IS_VLAN_IP(skb))
return NF_ACCEPT;
if ((skb = skb_share_check(*pskb, GFP_ATOMIC)) == NULL)
goto out;
- if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
- skb_pull(skb, VLAN_HLEN);
- (skb)->nh.raw += VLAN_HLEN;
+ if (skb->protocol == htons(ETH_P_8021Q)) {
+ skb_pull_rcsum(skb, VLAN_HLEN);
+ skb->nh.raw += VLAN_HLEN;
}
if (!pskb_may_pull(skb, sizeof(struct iphdr)))
if (iph->ihl < 5 || iph->version != 4)
goto inhdr_error;
- if (!pskb_may_pull(skb, 4*iph->ihl))
+ if (!pskb_may_pull(skb, 4 * iph->ihl))
goto inhdr_error;
iph = skb->nh.iph;
- if (ip_fast_csum((__u8 *)iph, iph->ihl) != 0)
+ if (ip_fast_csum((__u8 *) iph, iph->ihl) != 0)
goto inhdr_error;
len = ntohs(iph->tot_len);
- if (skb->len < len || len < 4*iph->ihl)
+ if (skb->len < len || len < 4 * iph->ihl)
goto inhdr_error;
if (skb->len > len) {
skb->ip_summed = CHECKSUM_NONE;
}
-#ifdef CONFIG_NETFILTER_DEBUG
- skb->nf_debug ^= (1 << NF_IP_PRE_ROUTING);
-#endif
- if ((nf_bridge = nf_bridge_alloc(skb)) == NULL)
+ nf_bridge_put(skb->nf_bridge);
+ if (!nf_bridge_alloc(skb))
+ return NF_DROP;
+ if (!setup_pre_routing(skb))
return NF_DROP;
- setup_pre_routing(skb);
store_orig_dstaddr(skb);
NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, skb->dev, NULL,
return NF_STOLEN;
inhdr_error:
-// IP_INC_STATS_BH(IpInHdrErrors);
+// IP_INC_STATS_BH(IpInHdrErrors);
out:
return NF_DROP;
}
* register an IPv4 PRE_ROUTING 'sabotage' hook that will
* prevent this from happening. */
static unsigned int br_nf_local_in(unsigned int hook, struct sk_buff **pskb,
- const struct net_device *in, const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
{
struct sk_buff *skb = *pskb;
return NF_ACCEPT;
}
-
/* PF_BRIDGE/FORWARD *************************************************/
static int br_nf_forward_finish(struct sk_buff *skb)
{
struct nf_bridge_info *nf_bridge = skb->nf_bridge;
struct net_device *in;
- struct vlan_ethhdr *hdr = vlan_eth_hdr(skb);
-
-#ifdef CONFIG_NETFILTER_DEBUG
- skb->nf_debug ^= (1 << NF_BR_FORWARD);
-#endif
- if (skb->protocol != __constant_htons(ETH_P_ARP) && !IS_VLAN_ARP) {
+ if (skb->protocol != htons(ETH_P_ARP) && !IS_VLAN_ARP(skb)) {
in = nf_bridge->physindev;
if (nf_bridge->mask & BRNF_PKT_TYPE) {
skb->pkt_type = PACKET_OTHERHOST;
} else {
in = *((struct net_device **)(skb->cb));
}
- if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ if (skb->protocol == htons(ETH_P_8021Q)) {
skb_push(skb, VLAN_HLEN);
skb->nh.raw -= VLAN_HLEN;
}
NF_HOOK_THRESH(PF_BRIDGE, NF_BR_FORWARD, skb, in,
- skb->dev, br_forward_finish, 1);
+ skb->dev, br_forward_finish, 1);
return 0;
}
* because of the physdev module. For ARP, indev and outdev are the
* bridge ports. */
static unsigned int br_nf_forward_ip(unsigned int hook, struct sk_buff **pskb,
- const struct net_device *in, const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
{
struct sk_buff *skb = *pskb;
struct nf_bridge_info *nf_bridge;
- struct vlan_ethhdr *hdr = vlan_eth_hdr(skb);
+ struct net_device *parent;
int pf;
if (!skb->nf_bridge)
return NF_ACCEPT;
- if (skb->protocol == __constant_htons(ETH_P_IP) || IS_VLAN_IP)
+ parent = bridge_parent(out);
+ if (!parent)
+ return NF_DROP;
+
+ if (skb->protocol == htons(ETH_P_IP) || IS_VLAN_IP(skb))
pf = PF_INET;
else
pf = PF_INET6;
- if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ if (skb->protocol == htons(ETH_P_8021Q)) {
skb_pull(*pskb, VLAN_HLEN);
(*pskb)->nh.raw += VLAN_HLEN;
}
-#ifdef CONFIG_NETFILTER_DEBUG
- skb->nf_debug ^= (1 << NF_BR_FORWARD);
-#endif
nf_bridge = skb->nf_bridge;
if (skb->pkt_type == PACKET_OTHERHOST) {
skb->pkt_type = PACKET_HOST;
nf_bridge->mask |= BRNF_BRIDGED;
nf_bridge->physoutdev = skb->dev;
- NF_HOOK(pf, NF_IP_FORWARD, skb, bridge_parent(in),
- bridge_parent(out), br_nf_forward_finish);
+ NF_HOOK(pf, NF_IP_FORWARD, skb, bridge_parent(in), parent,
+ br_nf_forward_finish);
return NF_STOLEN;
}
static unsigned int br_nf_forward_arp(unsigned int hook, struct sk_buff **pskb,
- const struct net_device *in, const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
{
struct sk_buff *skb = *pskb;
- struct vlan_ethhdr *hdr = vlan_eth_hdr(skb);
struct net_device **d = (struct net_device **)(skb->cb);
#ifdef CONFIG_SYSCTL
return NF_ACCEPT;
#endif
- if (skb->protocol != __constant_htons(ETH_P_ARP)) {
- if (!IS_VLAN_ARP)
+ if (skb->protocol != htons(ETH_P_ARP)) {
+ if (!IS_VLAN_ARP(skb))
return NF_ACCEPT;
skb_pull(*pskb, VLAN_HLEN);
(*pskb)->nh.raw += VLAN_HLEN;
}
-#ifdef CONFIG_NETFILTER_DEBUG
- skb->nf_debug ^= (1 << NF_BR_FORWARD);
-#endif
-
if (skb->nh.arph->ar_pln != 4) {
- if (IS_VLAN_ARP) {
+ if (IS_VLAN_ARP(skb)) {
skb_push(*pskb, VLAN_HLEN);
(*pskb)->nh.raw -= VLAN_HLEN;
}
return NF_STOLEN;
}
-
/* PF_BRIDGE/LOCAL_OUT ***********************************************/
static int br_nf_local_out_finish(struct sk_buff *skb)
{
-#ifdef CONFIG_NETFILTER_DEBUG
- skb->nf_debug &= ~(1 << NF_BR_LOCAL_OUT);
-#endif
- if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ if (skb->protocol == htons(ETH_P_8021Q)) {
skb_push(skb, VLAN_HLEN);
skb->nh.raw -= VLAN_HLEN;
}
NF_HOOK_THRESH(PF_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
- br_forward_finish, NF_BR_PRI_FIRST + 1);
+ br_forward_finish, NF_BR_PRI_FIRST + 1);
return 0;
}
* even routed packets that didn't arrive on a bridge interface have their
* nf_bridge->physindev set. */
static unsigned int br_nf_local_out(unsigned int hook, struct sk_buff **pskb,
- const struct net_device *in, const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
{
struct net_device *realindev, *realoutdev;
struct sk_buff *skb = *pskb;
struct nf_bridge_info *nf_bridge;
- struct vlan_ethhdr *hdr = vlan_eth_hdr(skb);
int pf;
if (!skb->nf_bridge)
return NF_ACCEPT;
- if (skb->protocol == __constant_htons(ETH_P_IP) || IS_VLAN_IP)
+ if (skb->protocol == htons(ETH_P_IP) || IS_VLAN_IP(skb))
pf = PF_INET;
else
pf = PF_INET6;
skb->pkt_type = PACKET_OTHERHOST;
nf_bridge->mask ^= BRNF_PKT_TYPE;
}
- if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ if (skb->protocol == htons(ETH_P_8021Q)) {
skb_push(skb, VLAN_HLEN);
skb->nh.raw -= VLAN_HLEN;
}
goto out;
}
realoutdev = bridge_parent(skb->dev);
+ if (!realoutdev)
+ return NF_DROP;
#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
/* iptables should match -o br0.x */
if (nf_bridge->netoutdev)
realoutdev = nf_bridge->netoutdev;
#endif
- if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ if (skb->protocol == htons(ETH_P_8021Q)) {
skb_pull(skb, VLAN_HLEN);
(*pskb)->nh.raw += VLAN_HLEN;
}
/* IP forwarded traffic has a physindev, locally
* generated traffic hasn't. */
if (realindev != NULL) {
- if (!(nf_bridge->mask & BRNF_DONT_TAKE_PARENT) &&
- has_bridge_parent(realindev))
- realindev = bridge_parent(realindev);
+ if (!(nf_bridge->mask & BRNF_DONT_TAKE_PARENT)) {
+ struct net_device *parent = bridge_parent(realindev);
+ if (parent)
+ realindev = parent;
+ }
NF_HOOK_THRESH(pf, NF_IP_FORWARD, skb, realindev,
realoutdev, br_nf_local_out_finish,
NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD + 1);
} else {
-#ifdef CONFIG_NETFILTER_DEBUG
- skb->nf_debug ^= (1 << NF_IP_LOCAL_OUT);
-#endif
-
NF_HOOK_THRESH(pf, NF_IP_LOCAL_OUT, skb, realindev,
realoutdev, br_nf_local_out_finish,
NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT + 1);
return NF_STOLEN;
}
+static int br_nf_dev_queue_xmit(struct sk_buff *skb)
+{
+ if (skb->protocol == htons(ETH_P_IP) &&
+ skb->len > skb->dev->mtu &&
+ !(skb_shinfo(skb)->ufo_size || skb_shinfo(skb)->tso_size))
+ return ip_fragment(skb, br_dev_queue_push_xmit);
+ else
+ return br_dev_queue_push_xmit(skb);
+}
/* PF_BRIDGE/POST_ROUTING ********************************************/
static unsigned int br_nf_post_routing(unsigned int hook, struct sk_buff **pskb,
- const struct net_device *in, const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
{
struct sk_buff *skb = *pskb;
struct nf_bridge_info *nf_bridge = (*pskb)->nf_bridge;
- struct vlan_ethhdr *hdr = vlan_eth_hdr(skb);
struct net_device *realoutdev = bridge_parent(skb->dev);
int pf;
* keep the check just to be sure... */
if (skb->mac.raw < skb->head || skb->mac.raw + ETH_HLEN > skb->data) {
printk(KERN_CRIT "br_netfilter: Argh!! br_nf_post_routing: "
- "bad mac.raw pointer.");
+ "bad mac.raw pointer.");
goto print_error;
}
#endif
if (!nf_bridge)
return NF_ACCEPT;
- if (skb->protocol == __constant_htons(ETH_P_IP) || IS_VLAN_IP)
+ if (!realoutdev)
+ return NF_DROP;
+
+ if (skb->protocol == htons(ETH_P_IP) || IS_VLAN_IP(skb))
pf = PF_INET;
else
pf = PF_INET6;
printk(KERN_CRIT "br_netfilter: skb->dst == NULL.");
goto print_error;
}
-
- skb->nf_debug ^= (1 << NF_IP_POST_ROUTING);
#endif
/* We assume any code from br_dev_queue_push_xmit onwards doesn't care
nf_bridge->mask |= BRNF_PKT_TYPE;
}
- if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ if (skb->protocol == htons(ETH_P_8021Q)) {
skb_pull(skb, VLAN_HLEN);
skb->nh.raw += VLAN_HLEN;
}
realoutdev = nf_bridge->netoutdev;
#endif
NF_HOOK(pf, NF_IP_POST_ROUTING, skb, NULL, realoutdev,
- br_dev_queue_push_xmit);
+ br_nf_dev_queue_xmit);
return NF_STOLEN;
print_error:
if (skb->dev != NULL) {
printk("[%s]", skb->dev->name);
- if (has_bridge_parent(skb->dev))
- printk("[%s]", bridge_parent(skb->dev)->name);
+ if (realoutdev)
+ printk("[%s]", realoutdev->name);
}
printk(" head:%p, raw:%p, data:%p\n", skb->head, skb->mac.raw,
- skb->data);
+ skb->data);
return NF_ACCEPT;
#endif
}
-
/* IP/SABOTAGE *****************************************************/
/* Don't hand locally destined packets to PF_INET(6)/PRE_ROUTING
* for the second time. */
static unsigned int ip_sabotage_in(unsigned int hook, struct sk_buff **pskb,
- const struct net_device *in, const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
{
if ((*pskb)->nf_bridge &&
!((*pskb)->nf_bridge->mask & BRNF_NF_BRIDGE_PREROUTING)) {
* and PF_INET(6)/POST_ROUTING until we have done the forwarding
* decision in the bridge code and have determined nf_bridge->physoutdev. */
static unsigned int ip_sabotage_out(unsigned int hook, struct sk_buff **pskb,
- const struct net_device *in, const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
{
struct sk_buff *skb = *pskb;
if ((out->hard_start_xmit == br_dev_xmit &&
- okfn != br_nf_forward_finish &&
- okfn != br_nf_local_out_finish &&
- okfn != br_dev_queue_push_xmit)
+ okfn != br_nf_forward_finish &&
+ okfn != br_nf_local_out_finish && okfn != br_nf_dev_queue_xmit)
#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
|| ((out->priv_flags & IFF_802_1Q_VLAN) &&
- VLAN_DEV_INFO(out)->real_dev->hard_start_xmit == br_dev_xmit)
+ VLAN_DEV_INFO(out)->real_dev->hard_start_xmit == br_dev_xmit)
#endif
) {
struct nf_bridge_info *nf_bridge;
* doesn't use the bridge parent of the indev by using
* the BRNF_DONT_TAKE_PARENT mask. */
if (hook == NF_IP_FORWARD && nf_bridge->physindev == NULL) {
- nf_bridge->mask &= BRNF_DONT_TAKE_PARENT;
+ nf_bridge->mask |= BRNF_DONT_TAKE_PARENT;
nf_bridge->physindev = (struct net_device *)in;
}
#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
#ifdef CONFIG_SYSCTL
static
-int brnf_sysctl_call_tables(ctl_table *ctl, int write, struct file * filp,
- void __user *buffer, size_t *lenp, loff_t *ppos)
+int brnf_sysctl_call_tables(ctl_table * ctl, int write, struct file *filp,
+ void __user * buffer, size_t * lenp, loff_t * ppos)
{
int ret;
#ifdef CONFIG_SYSCTL
brnf_sysctl_header = register_sysctl_table(brnf_net_table, 0);
if (brnf_sysctl_header == NULL) {
- printk(KERN_WARNING "br_netfilter: can't register to sysctl.\n");
+ printk(KERN_WARNING
+ "br_netfilter: can't register to sysctl.\n");
for (i = 0; i < ARRAY_SIZE(br_nf_ops); i++)
nf_unregister_hook(&br_nf_ops[i]);
return -EFAULT;
git://git.onelab.eu / linux-2.6.git / blobdiff