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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.
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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: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2013-12-29 00:30:59 -05:00
parent a72338a00e 2b1e2cb359
commit 8eb9bff0ed
11 changed files with 177 additions and 105 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
net/batman-adv/bat_iv_ogm.c
View File

@ -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,

6
net/batman-adv/distributed-arp-table.c
View File

@ -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);
}
}

8
net/batman-adv/fragmentation.c
View File

@ -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;

6
net/batman-adv/icmp_socket.c
View File

@ -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;

16
net/batman-adv/main.c
View File

@ -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;

22
net/batman-adv/network-coding.c
View File

@ -722,7 +722,7 @@ static bool batadv_can_nc_with_orig(struct batadv_priv *bat_priv,
{
if (orig_node->last_real_seqno != ntohl(ogm_packet->seqno))
return false;
if (orig_node->last_ttl != ogm_packet->header.ttl + 1)
if (orig_node->last_ttl != ogm_packet->ttl + 1)
return false;
if (!batadv_compare_eth(ogm_packet->orig, ogm_packet->prev_sender))
return false;
@ -1082,9 +1082,9 @@ static bool batadv_nc_code_packets(struct batadv_priv *bat_priv,
coded_packet = (struct batadv_coded_packet *)skb_dest->data;
skb_reset_mac_header(skb_dest);
coded_packet->header.packet_type = BATADV_CODED;
coded_packet->header.version = BATADV_COMPAT_VERSION;
coded_packet->header.ttl = packet1->header.ttl;
coded_packet->packet_type = BATADV_CODED;
coded_packet->version = BATADV_COMPAT_VERSION;
coded_packet->ttl = packet1->ttl;
/* Info about first unicast packet */
memcpy(coded_packet->first_source, first_source, ETH_ALEN);
@ -1097,7 +1097,7 @@ static bool batadv_nc_code_packets(struct batadv_priv *bat_priv,
memcpy(coded_packet->second_source, second_source, ETH_ALEN);
memcpy(coded_packet->second_orig_dest, packet2->dest, ETH_ALEN);
coded_packet->second_crc = packet_id2;
coded_packet->second_ttl = packet2->header.ttl;
coded_packet->second_ttl = packet2->ttl;
coded_packet->second_ttvn = packet2->ttvn;
coded_packet->coded_len = htons(coding_len);
@ -1452,7 +1452,7 @@ bool batadv_nc_skb_forward(struct sk_buff *skb,
/* We only handle unicast packets */
payload = skb_network_header(skb);
packet = (struct batadv_unicast_packet *)payload;
if (packet->header.packet_type != BATADV_UNICAST)
if (packet->packet_type != BATADV_UNICAST)
goto out;
/* Try to find a coding opportunity and send the skb if one is found */
@ -1505,7 +1505,7 @@ void batadv_nc_skb_store_for_decoding(struct batadv_priv *bat_priv,
/* Check for supported packet type */
payload = skb_network_header(skb);
packet = (struct batadv_unicast_packet *)payload;
if (packet->header.packet_type != BATADV_UNICAST)
if (packet->packet_type != BATADV_UNICAST)
goto out;
/* Find existing nc_path or create a new */
@ -1623,7 +1623,7 @@ batadv_nc_skb_decode_packet(struct batadv_priv *bat_priv, struct sk_buff *skb,
ttvn = coded_packet_tmp.second_ttvn;
} else {
orig_dest = coded_packet_tmp.first_orig_dest;
ttl = coded_packet_tmp.header.ttl;
ttl = coded_packet_tmp.ttl;
ttvn = coded_packet_tmp.first_ttvn;
}
@ -1648,9 +1648,9 @@ batadv_nc_skb_decode_packet(struct batadv_priv *bat_priv, struct sk_buff *skb,
/* Create decoded unicast packet */
unicast_packet = (struct batadv_unicast_packet *)skb->data;
unicast_packet->header.packet_type = BATADV_UNICAST;
unicast_packet->header.version = BATADV_COMPAT_VERSION;
unicast_packet->header.ttl = ttl;
unicast_packet->packet_type = BATADV_UNICAST;
unicast_packet->version = BATADV_COMPAT_VERSION;
unicast_packet->ttl = ttl;
memcpy(unicast_packet->dest, orig_dest, ETH_ALEN);
unicast_packet->ttvn = ttvn;

124
net/batman-adv/packet.h
View File

@ -155,6 +155,7 @@ enum batadv_tvlv_type {
BATADV_TVLV_ROAM = 0x05,
};
#pragma pack(2)
/* the destination hardware field in the ARP frame is used to
* transport the claim type and the group id
*/
@ -163,24 +164,20 @@ struct batadv_bla_claim_dst {
uint8_t type; /* bla_claimframe */
__be16 group; /* group id */
};
struct batadv_header {
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t ttl;
/* the parent struct has to add a byte after the header to make
* everything 4 bytes aligned again
*/
};
#pragma pack()
/**
* struct batadv_ogm_packet - ogm (routing protocol) packet
* @header: common batman packet header
* @packet_type: batman-adv packet type, part of the general header
* @version: batman-adv protocol version, part of the genereal header
* @ttl: time to live for this packet, part of the genereal header
* @flags: contains routing relevant flags - see enum batadv_iv_flags
* @tvlv_len: length of tvlv data following the ogm header
*/
struct batadv_ogm_packet {
struct batadv_header header;
uint8_t packet_type;
uint8_t version;
uint8_t ttl;
uint8_t flags;
__be32 seqno;
uint8_t orig[ETH_ALEN];
@ -196,29 +193,51 @@ struct batadv_ogm_packet {
#define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet)
/**
* batadv_icmp_header - common ICMP header
* @header: common batman header
* batadv_icmp_header - common members among all the ICMP packets
* @packet_type: batman-adv packet type, part of the general header
* @version: batman-adv protocol version, part of the genereal header
* @ttl: time to live for this packet, part of the genereal header
* @msg_type: ICMP packet type
* @dst: address of the destination node
* @orig: address of the source node
* @uid: local ICMP socket identifier
* @align: not used - useful for alignment purposes only
*
* This structure is used for ICMP packets parsing only and it is never sent
* over the wire. The alignment field at the end is there to ensure that
* members are padded the same way as they are in real packets.
*/
struct batadv_icmp_header {
struct batadv_header header;
uint8_t packet_type;
uint8_t version;
uint8_t ttl;
uint8_t msg_type; /* see ICMP message types above */
uint8_t dst[ETH_ALEN];
uint8_t orig[ETH_ALEN];
uint8_t uid;
uint8_t align[3];
};
/**
* batadv_icmp_packet - ICMP packet
* @icmph: common ICMP header
* @packet_type: batman-adv packet type, part of the general header
* @version: batman-adv protocol version, part of the genereal header
* @ttl: time to live for this packet, part of the genereal header
* @msg_type: ICMP packet type
* @dst: address of the destination node
* @orig: address of the source node
* @uid: local ICMP socket identifier
* @reserved: not used - useful for alignment
* @seqno: ICMP sequence number
*/
struct batadv_icmp_packet {
struct batadv_icmp_header icmph;
uint8_t packet_type;
uint8_t version;
uint8_t ttl;
uint8_t msg_type; /* see ICMP message types above */
uint8_t dst[ETH_ALEN];
uint8_t orig[ETH_ALEN];
uint8_t uid;
uint8_t reserved;
__be16 seqno;
};
@ -227,13 +246,25 @@ struct batadv_icmp_packet {
/**
* batadv_icmp_packet_rr - ICMP RouteRecord packet
* @icmph: common ICMP header
* @packet_type: batman-adv packet type, part of the general header
* @version: batman-adv protocol version, part of the genereal header
* @ttl: time to live for this packet, part of the genereal header
* @msg_type: ICMP packet type
* @dst: address of the destination node
* @orig: address of the source node
* @uid: local ICMP socket identifier
* @rr_cur: number of entries the rr array
* @seqno: ICMP sequence number
* @rr: route record array
*/
struct batadv_icmp_packet_rr {
struct batadv_icmp_header icmph;
uint8_t packet_type;
uint8_t version;
uint8_t ttl;
uint8_t msg_type; /* see ICMP message types above */
uint8_t dst[ETH_ALEN];
uint8_t orig[ETH_ALEN];
uint8_t uid;
uint8_t rr_cur;
__be16 seqno;
uint8_t rr[BATADV_RR_LEN][ETH_ALEN];
@ -253,8 +284,18 @@ struct batadv_icmp_packet_rr {
*/
#pragma pack(2)
/**
* struct batadv_unicast_packet - unicast packet for network payload
* @packet_type: batman-adv packet type, part of the general header
* @version: batman-adv protocol version, part of the genereal header
* @ttl: time to live for this packet, part of the genereal header
* @ttvn: translation table version number
* @dest: originator destination of the unicast packet
*/
struct batadv_unicast_packet {
struct batadv_header header;
uint8_t packet_type;
uint8_t version;
uint8_t ttl;
uint8_t ttvn; /* destination translation table version number */
uint8_t dest[ETH_ALEN];
/* "4 bytes boundary + 2 bytes" long to make the payload after the
@ -280,7 +321,9 @@ struct batadv_unicast_4addr_packet {
/**
* struct batadv_frag_packet - fragmented packet
* @header: common batman packet header with type, compatversion, and ttl
* @packet_type: batman-adv packet type, part of the general header
* @version: batman-adv protocol version, part of the genereal header
* @ttl: time to live for this packet, part of the genereal header
* @dest: final destination used when routing fragments
* @orig: originator of the fragment used when merging the packet
* @no: fragment number within this sequence
@ -289,7 +332,9 @@ struct batadv_unicast_4addr_packet {
* @total_size: size of the merged packet
*/
struct batadv_frag_packet {
struct batadv_header header;
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t ttl;
#if defined(__BIG_ENDIAN_BITFIELD)
uint8_t no:4;
uint8_t reserved:4;
@ -305,8 +350,19 @@ struct batadv_frag_packet {
__be16 total_size;
};
/**
* struct batadv_bcast_packet - broadcast packet for network payload
* @packet_type: batman-adv packet type, part of the general header
* @version: batman-adv protocol version, part of the genereal header
* @ttl: time to live for this packet, part of the genereal header
* @reserved: reserved byte for alignment
* @seqno: sequence identification
* @orig: originator of the broadcast packet
*/
struct batadv_bcast_packet {
struct batadv_header header;
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t ttl;
uint8_t reserved;
__be32 seqno;
uint8_t orig[ETH_ALEN];
@ -315,11 +371,11 @@ struct batadv_bcast_packet {
*/
};
#pragma pack()
/**
* struct batadv_coded_packet - network coded packet
* @header: common batman packet header and ttl of first included packet
* @packet_type: batman-adv packet type, part of the general header
* @version: batman-adv protocol version, part of the genereal header
* @ttl: time to live for this packet, part of the genereal header
* @reserved: Align following fields to 2-byte boundaries
* @first_source: original source of first included packet
* @first_orig_dest: original destinal of first included packet
@ -334,7 +390,9 @@ struct batadv_bcast_packet {
* @coded_len: length of network coded part of the payload
*/
struct batadv_coded_packet {
struct batadv_header header;
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t ttl;
uint8_t first_ttvn;
/* uint8_t first_dest[ETH_ALEN]; - saved in mac header destination */
uint8_t first_source[ETH_ALEN];
@ -349,9 +407,13 @@ struct batadv_coded_packet {
__be16 coded_len;
};
#pragma pack()
/**
* struct batadv_unicast_tvlv - generic unicast packet with tvlv payload
* @header: common batman packet header
* @packet_type: batman-adv packet type, part of the general header
* @version: batman-adv protocol version, part of the genereal header
* @ttl: time to live for this packet, part of the genereal header
* @reserved: reserved field (for packet alignment)
* @src: address of the source
* @dst: address of the destination
@ -359,7 +421,9 @@ struct batadv_coded_packet {
* @align: 2 bytes to align the header to a 4 byte boundry
*/
struct batadv_unicast_tvlv_packet {
struct batadv_header header;
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t ttl;
uint8_t reserved;
uint8_t dst[ETH_ALEN];
uint8_t src[ETH_ALEN];
@ -420,13 +484,13 @@ struct batadv_tvlv_tt_vlan_data {
* struct batadv_tvlv_tt_change - translation table diff data
* @flags: status indicators concerning the non-mesh client (see
* batadv_tt_client_flags)
* @reserved: reserved field
* @reserved: reserved field - useful for alignment purposes only
* @addr: mac address of non-mesh client that triggered this tt change
* @vid: VLAN identifier
*/
struct batadv_tvlv_tt_change {
uint8_t flags;
uint8_t reserved;
uint8_t reserved[3];
uint8_t addr[ETH_ALEN];
__be16 vid;
};

30
net/batman-adv/routing.c
View File

@ -308,7 +308,7 @@ static int batadv_recv_my_icmp_packet(struct batadv_priv *bat_priv,
memcpy(icmph->dst, icmph->orig, ETH_ALEN);
memcpy(icmph->orig, primary_if->net_dev->dev_addr, ETH_ALEN);
icmph->msg_type = BATADV_ECHO_REPLY;
icmph->header.ttl = BATADV_TTL;
icmph->ttl = BATADV_TTL;
res = batadv_send_skb_to_orig(skb, orig_node, NULL);
if (res != NET_XMIT_DROP)
@ -338,9 +338,9 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv,
icmp_packet = (struct batadv_icmp_packet *)skb->data;
/* send TTL exceeded if packet is an echo request (traceroute) */
if (icmp_packet->icmph.msg_type != BATADV_ECHO_REQUEST) {
if (icmp_packet->msg_type != BATADV_ECHO_REQUEST) {
pr_debug("Warning - can't forward icmp packet from %pM to %pM: ttl exceeded\n",
icmp_packet->icmph.orig, icmp_packet->icmph.dst);
icmp_packet->orig, icmp_packet->dst);
goto out;
}
@ -349,7 +349,7 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv,
goto out;
/* get routing information */
orig_node = batadv_orig_hash_find(bat_priv, icmp_packet->icmph.orig);
orig_node = batadv_orig_hash_find(bat_priv, icmp_packet->orig);
if (!orig_node)
goto out;
@ -359,11 +359,11 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv,
icmp_packet = (struct batadv_icmp_packet *)skb->data;
memcpy(icmp_packet->icmph.dst, icmp_packet->icmph.orig, ETH_ALEN);
memcpy(icmp_packet->icmph.orig, primary_if->net_dev->dev_addr,
memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
memcpy(icmp_packet->orig, primary_if->net_dev->dev_addr,
ETH_ALEN);
icmp_packet->icmph.msg_type = BATADV_TTL_EXCEEDED;
icmp_packet->icmph.header.ttl = BATADV_TTL;
icmp_packet->msg_type = BATADV_TTL_EXCEEDED;
icmp_packet->ttl = BATADV_TTL;
if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP)
ret = NET_RX_SUCCESS;
@ -434,7 +434,7 @@ int batadv_recv_icmp_packet(struct sk_buff *skb,
return batadv_recv_my_icmp_packet(bat_priv, skb);
/* TTL exceeded */
if (icmph->header.ttl < 2)
if (icmph->ttl < 2)
return batadv_recv_icmp_ttl_exceeded(bat_priv, skb);
/* get routing information */
@ -449,7 +449,7 @@ int batadv_recv_icmp_packet(struct sk_buff *skb,
icmph = (struct batadv_icmp_header *)skb->data;
/* decrement ttl */
icmph->header.ttl--;
icmph->ttl--;
/* route it */
if (batadv_send_skb_to_orig(skb, orig_node, recv_if) != NET_XMIT_DROP)
@ -709,7 +709,7 @@ static int batadv_route_unicast_packet(struct sk_buff *skb,
unicast_packet = (struct batadv_unicast_packet *)skb->data;
/* TTL exceeded */
if (unicast_packet->header.ttl < 2) {
if (unicast_packet->ttl < 2) {
pr_debug("Warning - can't forward unicast packet from %pM to %pM: ttl exceeded\n",
ethhdr->h_source, unicast_packet->dest);
goto out;
@ -727,9 +727,9 @@ static int batadv_route_unicast_packet(struct sk_buff *skb,
/* decrement ttl */
unicast_packet = (struct batadv_unicast_packet *)skb->data;
unicast_packet->header.ttl--;
unicast_packet->ttl--;
switch (unicast_packet->header.packet_type) {
switch (unicast_packet->packet_type) {
case BATADV_UNICAST_4ADDR:
hdr_len = sizeof(struct batadv_unicast_4addr_packet);
break;
@ -970,7 +970,7 @@ int batadv_recv_unicast_packet(struct sk_buff *skb,
unicast_packet = (struct batadv_unicast_packet *)skb->data;
unicast_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data;
is4addr = unicast_packet->header.packet_type == BATADV_UNICAST_4ADDR;
is4addr = unicast_packet->packet_type == BATADV_UNICAST_4ADDR;
/* the caller function should have already pulled 2 bytes */
if (is4addr)
hdr_size = sizeof(*unicast_4addr_packet);
@ -1160,7 +1160,7 @@ int batadv_recv_bcast_packet(struct sk_buff *skb,
if (batadv_is_my_mac(bat_priv, bcast_packet->orig))
goto out;
if (bcast_packet->header.ttl < 2)
if (bcast_packet->ttl < 2)
goto out;
orig_node = batadv_orig_hash_find(bat_priv, bcast_packet->orig);

10
net/batman-adv/send.c
View File

@ -161,11 +161,11 @@ batadv_send_skb_push_fill_unicast(struct sk_buff *skb, int hdr_size,
return false;
unicast_packet = (struct batadv_unicast_packet *)skb->data;
unicast_packet->header.version = BATADV_COMPAT_VERSION;
unicast_packet->version = BATADV_COMPAT_VERSION;
/* batman packet type: unicast */
unicast_packet->header.packet_type = BATADV_UNICAST;
unicast_packet->packet_type = BATADV_UNICAST;
/* set unicast ttl */
unicast_packet->header.ttl = BATADV_TTL;
unicast_packet->ttl = BATADV_TTL;
/* copy the destination for faster routing */
memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
/* set the destination tt version number */
@ -221,7 +221,7 @@ bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv,
goto out;
uc_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data;
uc_4addr_packet->u.header.packet_type = BATADV_UNICAST_4ADDR;
uc_4addr_packet->u.packet_type = BATADV_UNICAST_4ADDR;
memcpy(uc_4addr_packet->src, primary_if->net_dev->dev_addr, ETH_ALEN);
uc_4addr_packet->subtype = packet_subtype;
uc_4addr_packet->reserved = 0;
@ -436,7 +436,7 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
/* as we have a copy now, it is safe to decrease the TTL */
bcast_packet = (struct batadv_bcast_packet *)newskb->data;
bcast_packet->header.ttl--;
bcast_packet->ttl--;
skb_reset_mac_header(newskb);

18
net/batman-adv/soft-interface.c
View File

@ -264,11 +264,11 @@ static int batadv_interface_tx(struct sk_buff *skb,
goto dropped;
bcast_packet = (struct batadv_bcast_packet *)skb->data;
bcast_packet->header.version = BATADV_COMPAT_VERSION;
bcast_packet->header.ttl = BATADV_TTL;
bcast_packet->version = BATADV_COMPAT_VERSION;
bcast_packet->ttl = BATADV_TTL;
/* batman packet type: broadcast */
bcast_packet->header.packet_type = BATADV_BCAST;
bcast_packet->packet_type = BATADV_BCAST;
bcast_packet->reserved = 0;
/* hw address of first interface is the orig mac because only
@ -328,7 +328,7 @@ void batadv_interface_rx(struct net_device *soft_iface,
struct sk_buff *skb, struct batadv_hard_iface *recv_if,
int hdr_size, struct batadv_orig_node *orig_node)
{
struct batadv_header *batadv_header = (struct batadv_header *)skb->data;
struct batadv_bcast_packet *batadv_bcast_packet;
struct batadv_priv *bat_priv = netdev_priv(soft_iface);
__be16 ethertype = htons(ETH_P_BATMAN);
struct vlan_ethhdr *vhdr;
@ -336,7 +336,8 @@ void batadv_interface_rx(struct net_device *soft_iface,
unsigned short vid;
bool is_bcast;
is_bcast = (batadv_header->packet_type == BATADV_BCAST);
batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data;
is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST);
/* check if enough space is available for pulling, and pull */
if (!pskb_may_pull(skb, hdr_size))
@ -345,7 +346,12 @@ void batadv_interface_rx(struct net_device *soft_iface,
skb_pull_rcsum(skb, hdr_size);
skb_reset_mac_header(skb);
vid = batadv_get_vid(skb, hdr_size);
/* clean the netfilter state now that the batman-adv header has been
* removed
*/
nf_reset(skb);
vid = batadv_get_vid(skb, 0);
ethhdr = eth_hdr(skb);
switch (ntohs(ethhdr->h_proto)) {

6
net/batman-adv/translation-table.c
View File

@ -333,7 +333,8 @@ static void batadv_tt_local_event(struct batadv_priv *bat_priv,
return;
tt_change_node->change.flags = flags;
tt_change_node->change.reserved = 0;
memset(tt_change_node->change.reserved, 0,
sizeof(tt_change_node->change.reserved));
memcpy(tt_change_node->change.addr, common->addr, ETH_ALEN);
tt_change_node->change.vid = htons(common->vid);
@ -2221,7 +2222,8 @@ static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
ETH_ALEN);
tt_change->flags = tt_common_entry->flags;
tt_change->vid = htons(tt_common_entry->vid);
tt_change->reserved = 0;
memset(tt_change->reserved, 0,
sizeof(tt_change->reserved));
tt_num_entries++;
tt_change++;