예제 #1
0
파일: br_input.c 프로젝트: maliyu/SOM2416
/* note: already called with rcu_read_lock (preempt_disabled) */
int br_handle_frame_finish(struct sk_buff *skb)
{
	const unsigned char *dest = eth_hdr(skb)->h_dest;
	struct net_bridge_port *p = rcu_dereference(skb->dev->br_port);
	struct net_bridge *br;
	struct net_bridge_fdb_entry *dst;
	int passedup = 0;

	if (!p || p->state == BR_STATE_DISABLED)
		goto drop;

	/* insert into forwarding database after filtering to avoid spoofing */
	br = p->br;
	br_fdb_update(br, p, eth_hdr(skb)->h_source);

	if (p->state == BR_STATE_LEARNING)
		goto drop;

	if (br->dev->flags & IFF_PROMISC) {
		struct sk_buff *skb2;

		skb2 = skb_clone(skb, GFP_ATOMIC);
		if (skb2 != NULL) {
			passedup = 1;
			br_pass_frame_up(br, skb2);
		}
	}

	if (is_multicast_ether_addr(dest)) {
		br->statistics.multicast++;
		br_flood_forward(br, skb, !passedup);
		if (!passedup)
			br_pass_frame_up(br, skb);
		goto out;
	}

	dst = __br_fdb_get(br, dest);
	if (dst != NULL && dst->is_local) {
		if (!passedup)
			br_pass_frame_up(br, skb);
		else
			kfree_skb(skb);
		goto out;
	}

	if (dst != NULL) {
		br_forward(dst->dst, skb);
		goto out;
	}

	br_flood_forward(br, skb, 0);

out:
	return 0;
drop:
	kfree_skb(skb);
	goto out;
}
예제 #2
0
/* note: already called with rcu_read_lock (preempt_disabled) */
int br_handle_frame_finish(struct sk_buff *skb)
{
	const unsigned char *dest = eth_hdr(skb)->h_dest;
	struct net_bridge_port *p = skb->dev->br_port;
	struct net_bridge *br = p->br;
	struct net_bridge_fdb_entry *dst;
	int passedup = 0;

	/* insert into forwarding database after filtering to avoid spoofing */
	br_fdb_update(p->br, p, eth_hdr(skb)->h_source);

	if (br->dev->flags & IFF_PROMISC) {
		struct sk_buff *skb2;

		skb2 = skb_clone(skb, GFP_ATOMIC);
		if (skb2 != NULL) {
			passedup = 1;
			br_pass_frame_up(br, skb2);
		}
	}

	if (dest[0] & 1) {
		br_flood_forward(br, skb, !passedup);
		if (!passedup)
			br_pass_frame_up(br, skb);
		goto out;
	}

	dst = __br_fdb_get(br, dest);
	if (dst != NULL && dst->is_local) {
		if (!passedup)
			br_pass_frame_up(br, skb);
		else
			kfree_skb(skb);
		goto out;
	}

	if (dst != NULL) {
		br_forward(dst->dst, skb);
		goto out;
	}

	br_flood_forward(br, skb, 0);

out:
	return 0;
}
예제 #3
0
파일: br_input.c 프로젝트: janfj/dd-wrt
/* note: already called with rcu_read_lock (preempt_disabled) */
int br_handle_frame_finish(struct sk_buff *skb)
{
    const unsigned char *dest = eth_hdr(skb)->h_dest;
    struct net_bridge_port *p = rcu_dereference(skb->dev->br_port);
    struct net_bridge *br;
    struct net_bridge_fdb_entry *dst;
    struct sk_buff *skb2;

    if (!p || p->state == BR_STATE_DISABLED)
        goto drop;

    /* insert into forwarding database after filtering to avoid spoofing */
    br = p->br;
    br_fdb_update(br, p, eth_hdr(skb)->h_source);

    if ((p->state == BR_STATE_LEARNING) && skb->protocol != htons(ETH_P_PAE))
        goto drop;

    /* The packet skb2 goes to the local host (NULL to skip). */
    skb2 = NULL;

    if (br->dev->flags & IFF_PROMISC)
        skb2 = skb;

    dst = NULL;

    if (skb->protocol == htons(ETH_P_PAE)) {
        skb2 = skb;
        /* Do not forward 802.1x/EAP frames */
        skb = NULL;
    } else if (is_multicast_ether_addr(dest)) {
        br->statistics.multicast++;
        skb2 = skb;
    } else if ((dst = __br_fdb_get(br, dest)) && dst->is_local) {
        skb2 = skb;
        /* Do not forward the packet since it's local. */
        skb = NULL;
    }

    if (skb2 == skb)
        skb2 = skb_clone(skb, GFP_ATOMIC);

    if (skb2)
        br_pass_frame_up(br, skb2);

    if (skb) {
        if (dst)
            br_forward(dst->dst, skb);
        else
            br_flood_forward(br, skb);
    }

out:
    return 0;
drop:
    kfree_skb(skb);
    goto out;
}
예제 #4
0
파일: br_input.c 프로젝트: 513855417/linux
/* note: already called with rcu_read_lock */
static int br_handle_local_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
{
	struct net_bridge_port *p = br_port_get_rcu(skb->dev);

	__br_handle_local_finish(skb);

	BR_INPUT_SKB_CB(skb)->brdev = p->br->dev;
	br_pass_frame_up(skb);
	return 0;
}
예제 #5
0
int br_handle_frame_finish(struct sk_buff *skb)
{
	const unsigned char *dest = eth_hdr(skb)->h_dest;
	struct net_bridge_port *p = rcu_dereference(skb->dev->br_port);
	struct net_bridge *br;
	struct net_bridge_fdb_entry *dst;
	struct sk_buff *skb2;

	if (!p || p->state == BR_STATE_DISABLED)
		goto drop;

	
	br = p->br;
	br_fdb_update(br, p, eth_hdr(skb)->h_source);

	if (p->state == BR_STATE_LEARNING)
		goto drop;

	
	skb2 = NULL;

	if (br->dev->flags & IFF_PROMISC)
		skb2 = skb;

	dst = NULL;

	if (is_multicast_ether_addr(dest)) {
		br->dev->stats.multicast++;
		skb2 = skb;
	} else if ((dst = __br_fdb_get(br, dest)) && dst->is_local) {
		skb2 = skb;
		
		skb = NULL;
	}

	if (skb2 == skb)
		skb2 = skb_clone(skb, GFP_ATOMIC);

	if (skb2)
		br_pass_frame_up(br, skb2);

	if (skb) {
		if (dst)
			br_forward(dst->dst, skb);
		else
			br_flood_forward(br, skb);
	}

out:
	return 0;
drop:
	kfree_skb(skb);
	goto out;
}
예제 #6
0
/* note: already called with rcu_read_lock */
int br_handle_frame_finish(struct sk_buff *skb)
{
	const unsigned char *dest = eth_hdr(skb)->h_dest;
	struct net_bridge_port *p = br_port_get_rcu(skb->dev);
	struct net_bridge *br;
	struct net_bridge_fdb_entry *dst;
	struct net_bridge_mdb_entry *mdst;
	struct sk_buff *skb2;

	if (!p || p->state == BR_STATE_DISABLED)
		goto drop;

	/* insert into forwarding database after filtering to avoid spoofing */
	br = p->br;
	br_fdb_update(br, p, eth_hdr(skb)->h_source);

	if (is_multicast_ether_addr(dest) &&
	    br_multicast_rcv(br, p, skb))
		goto drop;

	if (p->state == BR_STATE_LEARNING)
		goto drop;

	BR_INPUT_SKB_CB(skb)->brdev = br->dev;

	/* The packet skb2 goes to the local host (NULL to skip). */
	skb2 = NULL;

	if (br->dev->flags & IFF_PROMISC)
		skb2 = skb;

	dst = NULL;

	if (is_multicast_ether_addr(dest)) {
		mdst = br_mdb_get(br, skb);
		if (mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) {
			if ((mdst && mdst->mglist) ||
			    br_multicast_is_router(br))
				skb2 = skb;
			br_multicast_forward(mdst, skb, skb2);
			skb = NULL;
			if (!skb2)
				goto out;
		} else
			skb2 = skb;

		br->dev->stats.multicast++;
	} else if ((dst = __br_fdb_get(br, dest)) && dst->is_local) {
		skb2 = skb;
		/* Do not forward the packet since it's local. */
		skb = NULL;
	}

	if (skb) {
		if (dst)
			br_forward(dst->dst, skb, skb2);
		else
			br_flood_forward(br, skb, skb2);
	}

	if (skb2)
		return br_pass_frame_up(skb2);

out:
	return 0;
drop:
	kfree_skb(skb);
	goto out;
}
static int br_handle_frame_finish(struct sk_buff *skb)
{
	struct net_bridge *br;
	unsigned char *dest;
	struct net_bridge_fdb_entry *dst;
	struct net_bridge_port *p;
	int passedup;

	dest = skb->mac.ethernet->h_dest;

	p = skb->dev->br_port;
	if (p == NULL)
		goto err_nolock;

	br = p->br;
	read_lock(&br->lock);
	if (skb->dev->br_port == NULL)
		goto err;

	passedup = 0;
	if (br->dev.flags & IFF_PROMISC) {
		struct sk_buff *skb2;

		skb2 = skb_clone(skb, GFP_ATOMIC);
		if (skb2 != NULL) {
			passedup = 1;
			br_pass_frame_up(br, skb2);
		}
	}

	if (dest[0] & 1) {
		br_flood_forward(br, skb, !passedup);
		if (!passedup)
			br_pass_frame_up(br, skb);
		goto out;
	}

	dst = br_fdb_get(br, dest);
	if (dst != NULL && dst->is_local) {
		if (!passedup)
			br_pass_frame_up(br, skb);
		else
			kfree_skb(skb);
		br_fdb_put(dst);
		goto out;
	}

	if (dst != NULL) {
		br_forward(dst->dst, skb);
		br_fdb_put(dst);
		goto out;
	}

	br_flood_forward(br, skb, 0);

out:
	read_unlock(&br->lock);
	return 0;

err:
	read_unlock(&br->lock);
err_nolock:
	kfree_skb(skb);
	return 0;
}
예제 #8
0
/* note: already called with rcu_read_lock (preempt_disabled) */
int br_handle_frame_finish(struct sk_buff *skb)
{
	const unsigned char *dest = eth_hdr(skb)->h_dest;
	struct net_bridge_port *p = rcu_dereference(skb->dev->br_port);
	struct net_bridge *br;
	struct net_bridge_fdb_entry *dst;
	struct sk_buff *skb2;

	if (!p || p->state == BR_STATE_DISABLED)
		goto drop;

	/* insert into forwarding database after filtering to avoid spoofing */
	br = p->br;
	br_fdb_update(br, p, eth_hdr(skb)->h_source);

	if (p->state == BR_STATE_LEARNING)
		goto drop;

	/* The packet skb2 goes to the local host (NULL to skip). */
	skb2 = NULL;

	if (br->dev->flags & IFF_PROMISC)
		skb2 = skb;

	dst = NULL;

#if defined(CONFIG_MIPS_BRCM) && defined(CONFIG_BR_MLD_SNOOP)
	if((0x33 == dest[0]) && (0x33 == dest[1])) {
		br->statistics.multicast++;
		skb2 = skb;
		if (br_mld_mc_forward(br, skb, 1, 0))
		{
			skb = NULL;
		}
	} else 
#endif
	if (is_multicast_ether_addr(dest)) {
		br->dev->stats.multicast++;
		skb2 = skb;
#if defined(CONFIG_MIPS_BRCM) && defined(CONFIG_BR_IGMP_SNOOP)
		if (br_igmp_mc_forward(br, skb, 1, 0)) 
		{
			skb = NULL;
		}
#endif
	} else 
	{
		dst = __br_fdb_get(br, dest);
#if defined(CONFIG_MIPS_BRCM) && defined(CONFIG_BLOG)
		blog_br_fdb(skb, __br_fdb_get(br, eth_hdr(skb)->h_source), dst);
#endif
		if ((dst != NULL) && dst->is_local) 
		{
			skb2 = skb;
			/* Do not forward the packet since it's local. */
			skb = NULL;
		}
	}

	if (skb2 == skb) 
		skb2 = skb_clone(skb, GFP_ATOMIC);

	if (skb2) 
		br_pass_frame_up(br, skb2);

	if (skb) {
		if (dst)
			br_forward(dst->dst, skb);
		else
			br_flood_forward(br, skb);
	}

out:
	return 0;
drop:
	kfree_skb(skb);
	goto out;
}
예제 #9
0
/* note: already called with rcu_read_lock */
int br_handle_frame_finish(struct sk_buff *skb)
{
	const unsigned char *dest = eth_hdr(skb)->h_dest;
	struct net_bridge_port *p = br_port_get_rcu(skb->dev);
	struct net_bridge *br;
	struct net_bridge_fdb_entry *dst;
	struct net_bridge_mdb_entry *mdst;
	struct sk_buff *skb2;

	if (!p || p->state == BR_STATE_DISABLED)
		goto drop;

	/* insert into forwarding database after filtering to avoid spoofing */
	br = p->br;
	br_fdb_update(br, p, eth_hdr(skb)->h_source);

	if (is_multicast_ether_addr(dest) &&
	    br_multicast_rcv(br, p, skb))
		goto drop;

	if (p->state == BR_STATE_LEARNING)
		goto drop;

	BR_INPUT_SKB_CB(skb)->brdev = br->dev;

	/* The packet skb2 goes to the local host (NULL to skip). */
	skb2 = NULL;

	if (br->dev->flags & IFF_PROMISC)
		skb2 = skb;

	dst = NULL;

	if (is_multicast_ether_addr(dest)) {
		mdst = br_mdb_get(br, skb);
		if (mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) {
			if ((mdst && !hlist_unhashed(&mdst->mglist)) ||
			    br_multicast_is_router(br))
				skb2 = skb;
			br_multicast_forward(mdst, skb, skb2);
			skb = NULL;
			if (!skb2)
				goto out;
		} else
			skb2 = skb;

		br->dev->stats.multicast++;
	} else if ((dst = __br_fdb_get(br, dest)) && dst->is_local) {
		skb2 = skb;
		/* Do not forward the packet since it's local. */
		skb = NULL;
	}

	if (skb) {
		if (dst)
			br_forward(dst->dst, skb, skb2);
		else
			br_flood_forward(br, skb, skb2);
	}

	if (skb2)
#ifdef CONFIG_WIRELESS_GUEST_ZONE
	{
		/* deny guest zone access UI */
		if(unlikely(br->guestzone_enabled))
		{
			//if (skb2->dev->support_guest_zone == 1) {
			if(unlikely(p->support_guest_zone))
			{
				if(!cameo_check_guest_local(skb2, p))
				{
					kfree_skb(skb2);
					goto out;
				}
			}
		}
#endif
		return br_pass_frame_up(skb2);
#ifdef CONFIG_WIRELESS_GUEST_ZONE
	}
#endif

out:
	return 0;
drop:
	kfree_skb(skb);
	goto out;
}
예제 #10
0
파일: br_input.c 프로젝트: 513855417/linux
/* note: already called with rcu_read_lock */
int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
{
	const unsigned char *dest = eth_hdr(skb)->h_dest;
	struct net_bridge_port *p = br_port_get_rcu(skb->dev);
	struct net_bridge *br;
	struct net_bridge_fdb_entry *dst;
	struct net_bridge_mdb_entry *mdst;
	struct sk_buff *skb2;
	bool unicast = true;
	u16 vid = 0;

	if (!p || p->state == BR_STATE_DISABLED)
		goto drop;

	if (!br_allowed_ingress(p->br, nbp_vlan_group_rcu(p), skb, &vid))
		goto out;

	/* insert into forwarding database after filtering to avoid spoofing */
	br = p->br;
	if (p->flags & BR_LEARNING)
		br_fdb_update(br, p, eth_hdr(skb)->h_source, vid, false);

	if (!is_broadcast_ether_addr(dest) && is_multicast_ether_addr(dest) &&
	    br_multicast_rcv(br, p, skb, vid))
		goto drop;

	if (p->state == BR_STATE_LEARNING)
		goto drop;

	BR_INPUT_SKB_CB(skb)->brdev = br->dev;

	/* The packet skb2 goes to the local host (NULL to skip). */
	skb2 = NULL;

	if (br->dev->flags & IFF_PROMISC)
		skb2 = skb;

	dst = NULL;

	if (IS_ENABLED(CONFIG_INET) && skb->protocol == htons(ETH_P_ARP))
		br_do_proxy_arp(skb, br, vid, p);

	if (is_broadcast_ether_addr(dest)) {
		skb2 = skb;
		unicast = false;
	} else if (is_multicast_ether_addr(dest)) {
		mdst = br_mdb_get(br, skb, vid);
		if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
		    br_multicast_querier_exists(br, eth_hdr(skb))) {
			if ((mdst && mdst->mglist) ||
			    br_multicast_is_router(br))
				skb2 = skb;
			br_multicast_forward(mdst, skb, skb2);
			skb = NULL;
			if (!skb2)
				goto out;
		} else
			skb2 = skb;

		unicast = false;
		br->dev->stats.multicast++;
	} else if ((dst = __br_fdb_get(br, dest, vid)) &&
			dst->is_local) {
		skb2 = skb;
		/* Do not forward the packet since it's local. */
		skb = NULL;
	}

	if (skb) {
		if (dst) {
			dst->used = jiffies;
			br_forward(dst->dst, skb, skb2);
		} else
			br_flood_forward(br, skb, skb2, unicast);
	}

	if (skb2)
		return br_pass_frame_up(skb2);

out:
	return 0;
drop:
	kfree_skb(skb);
	goto out;
}
예제 #11
0
/* note: already called with rcu_read_lock */
int br_handle_frame_finish(struct sk_buff *skb)
{
	const unsigned char *dest = eth_hdr(skb)->h_dest;
	struct net_bridge_port *p = br_port_get_rcu(skb->dev);
	struct net_bridge *br;
	struct net_bridge_fdb_entry *dst;
	struct net_bridge_mdb_entry *mdst;
	struct sk_buff *skb2;
	struct net_bridge_port *pdst = NULL;
	br_get_dst_hook_t *get_dst_hook = rcu_dereference(br_get_dst_hook);

	if (!p || p->state == BR_STATE_DISABLED)
		goto drop;

	/* insert into forwarding database after filtering to avoid spoofing */
	br = p->br;
	br_fdb_update(br, p, eth_hdr(skb)->h_source);

	if (!is_broadcast_ether_addr(dest) && is_multicast_ether_addr(dest) &&
	    br_multicast_rcv(br, p, skb))
		goto drop;

	if ((p->state == BR_STATE_LEARNING) && skb->protocol != htons(ETH_P_PAE))
		goto drop;

	BR_INPUT_SKB_CB(skb)->brdev = br->dev;

	/* The packet skb2 goes to the local host (NULL to skip). */
	skb2 = NULL;

	if (br->dev->flags & IFF_PROMISC)
		skb2 = skb;

	dst = NULL;

	if (skb->protocol == htons(ETH_P_PAE)) {
		skb2 = skb;
		/* Do not forward 802.1x/EAP frames */
		skb = NULL;
	} else if (is_broadcast_ether_addr(dest))
		skb2 = skb;
	else if (is_multicast_ether_addr(dest)) {
		br_multicast_handle_hook_t *multicast_handle_hook = rcu_dereference(br_multicast_handle_hook);
		if (!__br_get(multicast_handle_hook, true, p, skb))
			goto out;

		mdst = br_mdb_get(br, skb);
		if (mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) {
			if ((mdst && mdst->mglist) ||
			    br_multicast_is_router(br))
				skb2 = skb;
			br_multicast_forward(mdst, skb, skb2);
			skb = NULL;
			if (!skb2)
				goto out;
		} else
			skb2 = skb;

		br->dev->stats.multicast++;
	} else if ((pdst = __br_get(get_dst_hook, NULL, p, &skb))) {
		if (!skb) goto out;
	} else if ((p->flags & BR_ISOLATE_MODE) ||
		   ((dst = __br_fdb_get(br, dest)) && dst->is_local)) {
		skb2 = skb;
		/* Do not forward the packet since it's local. */
		skb = NULL;
	}

	if (skb) {
		if (dst) {
			dst->used = jiffies;
			pdst = dst->dst;
		}

		if (pdst)
			br_forward(pdst, skb, skb2);
		else
			br_flood_forward(br, skb, skb2);
	}

	if (skb2)
		return br_pass_frame_up(skb2);

out:
	return 0;
drop:
	kfree_skb(skb);
	goto out;
}
예제 #12
0
파일: br_input.c 프로젝트: mdamt/linux
/* note: already called with rcu_read_lock */
int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
{
	struct net_bridge_port *p = br_port_get_rcu(skb->dev);
	enum br_pkt_type pkt_type = BR_PKT_UNICAST;
	struct net_bridge_fdb_entry *dst = NULL;
	struct net_bridge_mdb_entry *mdst;
	bool local_rcv, mcast_hit = false;
	const unsigned char *dest;
	struct net_bridge *br;
	u16 vid = 0;

	if (!p || p->state == BR_STATE_DISABLED)
		goto drop;

	if (!br_allowed_ingress(p->br, nbp_vlan_group_rcu(p), skb, &vid))
		goto out;

	nbp_switchdev_frame_mark(p, skb);

	/* insert into forwarding database after filtering to avoid spoofing */
	br = p->br;
	if (p->flags & BR_LEARNING)
		br_fdb_update(br, p, eth_hdr(skb)->h_source, vid, false);

	local_rcv = !!(br->dev->flags & IFF_PROMISC);
	dest = eth_hdr(skb)->h_dest;
	if (is_multicast_ether_addr(dest)) {
		/* by definition the broadcast is also a multicast address */
		if (is_broadcast_ether_addr(dest)) {
			pkt_type = BR_PKT_BROADCAST;
			local_rcv = true;
		} else {
			pkt_type = BR_PKT_MULTICAST;
			if (br_multicast_rcv(br, p, skb, vid))
				goto drop;
		}
	}

	if (p->state == BR_STATE_LEARNING)
		goto drop;

	BR_INPUT_SKB_CB(skb)->brdev = br->dev;

	if (IS_ENABLED(CONFIG_INET) && skb->protocol == htons(ETH_P_ARP))
		br_do_proxy_arp(skb, br, vid, p);

	switch (pkt_type) {
	case BR_PKT_MULTICAST:
		mdst = br_mdb_get(br, skb, vid);
		if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
		    br_multicast_querier_exists(br, eth_hdr(skb))) {
			if ((mdst && mdst->mglist) ||
			    br_multicast_is_router(br)) {
				local_rcv = true;
				br->dev->stats.multicast++;
			}
			mcast_hit = true;
		} else {
			local_rcv = true;
			br->dev->stats.multicast++;
		}
		break;
	case BR_PKT_UNICAST:
		dst = br_fdb_find_rcu(br, dest, vid);
	default:
		break;
	}

	if (dst) {
		unsigned long now = jiffies;

		if (dst->is_local)
			return br_pass_frame_up(skb);

		if (now != dst->used)
			dst->used = now;
		br_forward(dst->dst, skb, local_rcv, false);
	} else {
		if (!mcast_hit)
			br_flood(br, skb, pkt_type, local_rcv, false);
		else
			br_multicast_flood(mdst, skb, local_rcv, false);
	}

	if (local_rcv)
		return br_pass_frame_up(skb);

out:
	return 0;
drop:
	kfree_skb(skb);
	goto out;
}