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Commit 8eb9bff0 authored by David S. Miller's avatar David S. Miller
Browse files

Merge tag 'batman-adv-fix-for-davem' of git://git.open-mesh.org/linux-merge 



Included changes:

- reset netfilter-bridge state when removing the batman-adv
  header from an incoming packet. This prevents netfilter
  bridge from being fooled when the same packet enters a
  bridge twice (or more): the first time within the
  batman-adv header and the second time without.

- adjust the packet layout to prevent any architecture from
  adding padding bytes. All the structs sent over the wire
  now have size multiple of 4bytes (unless pack(2) is used).

- fix access to the inner vlan_eth header when reading the
  VID in the rx path.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents a72338a0 2b1e2cb3

net/batman-adv/bat_iv_ogm.c

+18 −18
Original line number Diff line number Diff line
@@ -307,9 +307,9 @@ static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface *hard_iface) 
	hard_iface->bat_iv.ogm_buff = ogm_buff;



	batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff;

	batadv_ogm_packet->header.packet_type = BATADV_IV_OGM;

	batadv_ogm_packet->header.version = BATADV_COMPAT_VERSION;

	batadv_ogm_packet->header.ttl = 2;

	batadv_ogm_packet->packet_type = BATADV_IV_OGM;

	batadv_ogm_packet->version = BATADV_COMPAT_VERSION;

	batadv_ogm_packet->ttl = 2;

	batadv_ogm_packet->flags = BATADV_NO_FLAGS;

	batadv_ogm_packet->reserved = 0;

	batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE;
@@ -346,7 +346,7 @@ batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) 


	batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff;

	batadv_ogm_packet->flags = BATADV_PRIMARIES_FIRST_HOP;

	batadv_ogm_packet->header.ttl = BATADV_TTL;

	batadv_ogm_packet->ttl = BATADV_TTL;

}



/* when do we schedule our own ogm to be sent */
@@ -435,7 +435,7 @@ static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, 
			   fwd_str, (packet_num > 0 ? "aggregated " : ""),

			   batadv_ogm_packet->orig,

			   ntohl(batadv_ogm_packet->seqno),

			   batadv_ogm_packet->tq, batadv_ogm_packet->header.ttl,

			   batadv_ogm_packet->tq, batadv_ogm_packet->ttl,

			   (batadv_ogm_packet->flags & BATADV_DIRECTLINK ?

			    "on" : "off"),

			   hard_iface->net_dev->name,
@@ -491,7 +491,7 @@ static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) 
	/* multihomed peer assumed

	 * non-primary OGMs are only broadcasted on their interface

	 */

	if ((directlink && (batadv_ogm_packet->header.ttl == 1)) ||

	if ((directlink && (batadv_ogm_packet->ttl == 1)) ||

	    (forw_packet->own && (forw_packet->if_incoming != primary_if))) {

		/* FIXME: what about aggregated packets ? */

		batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
@@ -499,7 +499,7 @@ static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) 
			   (forw_packet->own ? "Sending own" : "Forwarding"),

			   batadv_ogm_packet->orig,

			   ntohl(batadv_ogm_packet->seqno),

			   batadv_ogm_packet->header.ttl,

			   batadv_ogm_packet->ttl,

			   forw_packet->if_incoming->net_dev->name,

			   forw_packet->if_incoming->net_dev->dev_addr);
@@ -572,7 +572,7 @@ batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, 
		 */

		if ((!directlink) &&

		    (!(batadv_ogm_packet->flags & BATADV_DIRECTLINK)) &&

		    (batadv_ogm_packet->header.ttl != 1) &&

		    (batadv_ogm_packet->ttl != 1) &&



		    /* own packets originating non-primary

		     * interfaces leave only that interface
@@ -587,7 +587,7 @@ batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, 
		 * interface only - we still can aggregate

		 */

		if ((directlink) &&

		    (new_bat_ogm_packet->header.ttl == 1) &&

		    (new_bat_ogm_packet->ttl == 1) &&

		    (forw_packet->if_incoming == if_incoming) &&



		    /* packets from direct neighbors or
@@ -778,7 +778,7 @@ static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, 
	struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface);

	uint16_t tvlv_len;



	if (batadv_ogm_packet->header.ttl <= 1) {

	if (batadv_ogm_packet->ttl <= 1) {

		batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n");

		return;

	}
@@ -798,7 +798,7 @@ static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, 


	tvlv_len = ntohs(batadv_ogm_packet->tvlv_len);



	batadv_ogm_packet->header.ttl--;

	batadv_ogm_packet->ttl--;

	memcpy(batadv_ogm_packet->prev_sender, ethhdr->h_source, ETH_ALEN);



	/* apply hop penalty */
@@ -807,7 +807,7 @@ static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, 


	batadv_dbg(BATADV_DBG_BATMAN, bat_priv,

		   "Forwarding packet: tq: %i, ttl: %i\n",

		   batadv_ogm_packet->tq, batadv_ogm_packet->header.ttl);

		   batadv_ogm_packet->tq, batadv_ogm_packet->ttl);



	/* switch of primaries first hop flag when forwarding */

	batadv_ogm_packet->flags &= ~BATADV_PRIMARIES_FIRST_HOP;
@@ -972,8 +972,8 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, 
	spin_unlock_bh(&neigh_node->bat_iv.lq_update_lock);



	if (dup_status == BATADV_NO_DUP) {

		orig_node->last_ttl = batadv_ogm_packet->header.ttl;

		neigh_node->last_ttl = batadv_ogm_packet->header.ttl;

		orig_node->last_ttl = batadv_ogm_packet->ttl;

		neigh_node->last_ttl = batadv_ogm_packet->ttl;

	}



	batadv_bonding_candidate_add(bat_priv, orig_node, neigh_node);
@@ -1247,7 +1247,7 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, 
	 * packet in an aggregation.  Here we expect that the padding

	 * is always zero (or not 0x01)

	 */

	if (batadv_ogm_packet->header.packet_type != BATADV_IV_OGM)

	if (batadv_ogm_packet->packet_type != BATADV_IV_OGM)

		return;



	/* could be changed by schedule_own_packet() */
@@ -1267,8 +1267,8 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, 
		   if_incoming->net_dev->dev_addr, batadv_ogm_packet->orig,

		   batadv_ogm_packet->prev_sender,

		   ntohl(batadv_ogm_packet->seqno), batadv_ogm_packet->tq,

		   batadv_ogm_packet->header.ttl,

		   batadv_ogm_packet->header.version, has_directlink_flag);

		   batadv_ogm_packet->ttl,

		   batadv_ogm_packet->version, has_directlink_flag);



	rcu_read_lock();

	list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
@@ -1433,7 +1433,7 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, 
	 * seqno and similar ttl as the non-duplicate

	 */

	sameseq = orig_node->last_real_seqno == ntohl(batadv_ogm_packet->seqno);

	similar_ttl = orig_node->last_ttl - 3 <= batadv_ogm_packet->header.ttl;

	similar_ttl = orig_node->last_ttl - 3 <= batadv_ogm_packet->ttl;

	if (is_bidirect && ((dup_status == BATADV_NO_DUP) ||

			    (sameseq && similar_ttl)))

		batadv_iv_ogm_orig_update(bat_priv, orig_node, ethhdr,

net/batman-adv/distributed-arp-table.c

+3 −3
Original line number Diff line number Diff line
@@ -349,7 +349,7 @@ static void batadv_dbg_arp(struct batadv_priv *bat_priv, struct sk_buff *skb, 


	unicast_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data;



	switch (unicast_4addr_packet->u.header.packet_type) {

	switch (unicast_4addr_packet->u.packet_type) {

	case BATADV_UNICAST:

		batadv_dbg(BATADV_DBG_DAT, bat_priv,

			   "* encapsulated within a UNICAST packet\n");
@@ -374,7 +374,7 @@ static void batadv_dbg_arp(struct batadv_priv *bat_priv, struct sk_buff *skb, 
			break;

		default:

			batadv_dbg(BATADV_DBG_DAT, bat_priv, "* type: Unknown (%u)!\n",

				   unicast_4addr_packet->u.header.packet_type);

				   unicast_4addr_packet->u.packet_type);

		}

		break;

	case BATADV_BCAST:
@@ -387,7 +387,7 @@ static void batadv_dbg_arp(struct batadv_priv *bat_priv, struct sk_buff *skb, 
	default:

		batadv_dbg(BATADV_DBG_DAT, bat_priv,

			   "* encapsulated within an unknown packet type (0x%x)\n",

			   unicast_4addr_packet->u.header.packet_type);

			   unicast_4addr_packet->u.packet_type);

	}

}

net/batman-adv/fragmentation.c

+4 −4
Original line number Diff line number Diff line
@@ -355,7 +355,7 @@ bool batadv_frag_skb_fwd(struct sk_buff *skb, 
		batadv_add_counter(bat_priv, BATADV_CNT_FRAG_FWD_BYTES,

				   skb->len + ETH_HLEN);



		packet->header.ttl--;

		packet->ttl--;

		batadv_send_skb_packet(skb, neigh_node->if_incoming,

				       neigh_node->addr);

		ret = true;
@@ -444,9 +444,9 @@ bool batadv_frag_send_packet(struct sk_buff *skb, 
		goto out_err;



	/* Create one header to be copied to all fragments */

	frag_header.header.packet_type = BATADV_UNICAST_FRAG;

	frag_header.header.version = BATADV_COMPAT_VERSION;

	frag_header.header.ttl = BATADV_TTL;

	frag_header.packet_type = BATADV_UNICAST_FRAG;

	frag_header.version = BATADV_COMPAT_VERSION;

	frag_header.ttl = BATADV_TTL;

	frag_header.seqno = htons(atomic_inc_return(&bat_priv->frag_seqno));

	frag_header.reserved = 0;

	frag_header.no = 0;

net/batman-adv/icmp_socket.c

+3 −3
Original line number Diff line number Diff line
@@ -194,7 +194,7 @@ static ssize_t batadv_socket_write(struct file *file, const char __user *buff, 
		goto free_skb;

	}



	if (icmp_header->header.packet_type != BATADV_ICMP) {

	if (icmp_header->packet_type != BATADV_ICMP) {

		batadv_dbg(BATADV_DBG_BATMAN, bat_priv,

			   "Error - can't send packet from char device: got bogus packet type (expected: BAT_ICMP)\n");

		len = -EINVAL;
@@ -243,9 +243,9 @@ static ssize_t batadv_socket_write(struct file *file, const char __user *buff, 


	icmp_header->uid = socket_client->index;



	if (icmp_header->header.version != BATADV_COMPAT_VERSION) {

	if (icmp_header->version != BATADV_COMPAT_VERSION) {

		icmp_header->msg_type = BATADV_PARAMETER_PROBLEM;

		icmp_header->header.version = BATADV_COMPAT_VERSION;

		icmp_header->version = BATADV_COMPAT_VERSION;

		batadv_socket_add_packet(socket_client, icmp_header,

					 packet_len);

		goto free_skb;

net/batman-adv/main.c

+8 −8
Original line number Diff line number Diff line
@@ -383,17 +383,17 @@ int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev, 


	batadv_ogm_packet = (struct batadv_ogm_packet *)skb->data;



	if (batadv_ogm_packet->header.version != BATADV_COMPAT_VERSION) {

	if (batadv_ogm_packet->version != BATADV_COMPAT_VERSION) {

		batadv_dbg(BATADV_DBG_BATMAN, bat_priv,

			   "Drop packet: incompatible batman version (%i)\n",

			   batadv_ogm_packet->header.version);

			   batadv_ogm_packet->version);

		goto err_free;

	}



	/* all receive handlers return whether they received or reused

	 * the supplied skb. if not, we have to free the skb.

	 */

	idx = batadv_ogm_packet->header.packet_type;

	idx = batadv_ogm_packet->packet_type;

	ret = (*batadv_rx_handler[idx])(skb, hard_iface);



	if (ret == NET_RX_DROP)
@@ -426,8 +426,8 @@ static void batadv_recv_handler_init(void) 
	BUILD_BUG_ON(offsetof(struct batadv_unicast_packet, dest) != 4);

	BUILD_BUG_ON(offsetof(struct batadv_unicast_tvlv_packet, dst) != 4);

	BUILD_BUG_ON(offsetof(struct batadv_frag_packet, dest) != 4);

	BUILD_BUG_ON(offsetof(struct batadv_icmp_packet, icmph.dst) != 4);

	BUILD_BUG_ON(offsetof(struct batadv_icmp_packet_rr, icmph.dst) != 4);

	BUILD_BUG_ON(offsetof(struct batadv_icmp_packet, dst) != 4);

	BUILD_BUG_ON(offsetof(struct batadv_icmp_packet_rr, dst) != 4);



	/* broadcast packet */

	batadv_rx_handler[BATADV_BCAST] = batadv_recv_bcast_packet;
@@ -1119,9 +1119,9 @@ void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, uint8_t *src, 
	skb_reserve(skb, ETH_HLEN);

	tvlv_buff = skb_put(skb, sizeof(*unicast_tvlv_packet) + tvlv_len);

	unicast_tvlv_packet = (struct batadv_unicast_tvlv_packet *)tvlv_buff;

	unicast_tvlv_packet->header.packet_type = BATADV_UNICAST_TVLV;

	unicast_tvlv_packet->header.version = BATADV_COMPAT_VERSION;

	unicast_tvlv_packet->header.ttl = BATADV_TTL;

	unicast_tvlv_packet->packet_type = BATADV_UNICAST_TVLV;

	unicast_tvlv_packet->version = BATADV_COMPAT_VERSION;

	unicast_tvlv_packet->ttl = BATADV_TTL;

	unicast_tvlv_packet->reserved = 0;

	unicast_tvlv_packet->tvlv_len = htons(tvlv_len);

	unicast_tvlv_packet->align = 0;