diff options
| -rw-r--r-- | net/batman-adv/main.c | 4 | ||||
| -rw-r--r-- | net/batman-adv/packet.h | 40 | ||||
| -rw-r--r-- | net/batman-adv/routing.c | 14 |
3 files changed, 44 insertions, 14 deletions
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c index d87778b9c5b4..1511f64a6cea 100644 --- a/net/batman-adv/main.c +++ b/net/batman-adv/main.c @@ -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; diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h index 175ce7d721d6..2a857ed006fd 100644 --- a/net/batman-adv/packet.h +++ b/net/batman-adv/packet.h @@ -191,7 +191,7 @@ struct batadv_ogm_packet { #define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet) /** - * batadv_icmp_header - common ICMP 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 @@ -199,6 +199,11 @@ struct batadv_ogm_packet { * @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 { uint8_t packet_type; @@ -208,16 +213,29 @@ struct batadv_icmp_header { 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; }; @@ -226,13 +244,25 @@ 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]; diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 5b52d718a6eb..46278bfb8fdb 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -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.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; |