return data_len;
}
-static int skb_pull_and_merge(struct sk_buff *skb, unsigned char *src, int len)
-{
- int tail_len;
- unsigned long end, tail;
-
- if ((src+len) > skb_tail_pointer(skb) || skb->len < len)
- return -1;
-
- tail = (unsigned long)skb_tail_pointer(skb);
- end = (unsigned long)src+len;
- if (tail < end)
- return -1;
-
- tail_len = (int)(tail-end);
- if (tail_len > 0)
- memmove(src, src+len, tail_len);
-
- skb_trim(skb, skb->len-len);
- return 0;
-}
-
static inline unsigned long __nat25_timeout(struct adapter *priv)
{
unsigned long timeout;
memcpy(networkAddr+3, (unsigned char *)ac_mac, 6);
}
-static void __nat25_generate_ipv6_network_addr(unsigned char *networkAddr,
- __be32 *ipAddr)
-{
- memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN);
-
- networkAddr[0] = NAT25_IPV6;
- memcpy(networkAddr+1, (unsigned char *)ipAddr, 16);
-}
-
-static unsigned char *scan_tlv(unsigned char *data, int len, unsigned char tag, unsigned char len8b)
-{
- while (len > 0) {
- if (*data == tag && *(data+1) == len8b && len >= len8b*8)
- return data+2;
-
- len -= (*(data+1))*8;
- data += (*(data+1))*8;
- }
- return NULL;
-}
-
-static int update_nd_link_layer_addr(unsigned char *data, int len, unsigned char *replace_mac)
-{
- struct icmp6hdr *icmphdr = (struct icmp6hdr *)data;
- unsigned char *mac;
-
- if (icmphdr->icmp6_type == NDISC_ROUTER_SOLICITATION) {
- if (len >= 8) {
- mac = scan_tlv(&data[8], len-8, 1, 1);
- if (mac) {
- _DEBUG_INFO("Router Solicitation, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n",
- mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
- replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]);
- memcpy(mac, replace_mac, 6);
- return 1;
- }
- }
- } else if (icmphdr->icmp6_type == NDISC_ROUTER_ADVERTISEMENT) {
- if (len >= 16) {
- mac = scan_tlv(&data[16], len-16, 1, 1);
- if (mac) {
- _DEBUG_INFO("Router Advertisement, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n",
- mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
- replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]);
- memcpy(mac, replace_mac, 6);
- return 1;
- }
- }
- } else if (icmphdr->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) {
- if (len >= 24) {
- mac = scan_tlv(&data[24], len-24, 1, 1);
- if (mac) {
- _DEBUG_INFO("Neighbor Solicitation, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n",
- mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
- replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]);
- memcpy(mac, replace_mac, 6);
- return 1;
- }
- }
- } else if (icmphdr->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
- if (len >= 24) {
- mac = scan_tlv(&data[24], len-24, 2, 1);
- if (mac) {
- _DEBUG_INFO("Neighbor Advertisement, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n",
- mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
- replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]);
- memcpy(mac, replace_mac, 6);
- return 1;
- }
- }
- } else if (icmphdr->icmp6_type == NDISC_REDIRECT) {
- if (len >= 40) {
- mac = scan_tlv(&data[40], len-40, 2, 1);
- if (mac) {
- _DEBUG_INFO("Redirect, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n",
- mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
- replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]);
- memcpy(mac, replace_mac, 6);
- return 1;
- }
- }
- }
- return 0;
-}
-
static inline int __nat25_network_hash(unsigned char *networkAddr)
{
if (networkAddr[0] == NAT25_IPV4) {
ent->pprev_hash = NULL;
}
-static int __nat25_db_network_lookup_and_replace(struct adapter *priv,
- struct sk_buff *skb, unsigned char *networkAddr)
-{
- struct nat25_network_db_entry *db;
- spin_lock_bh(&priv->br_ext_lock);
-
- db = priv->nethash[__nat25_network_hash(networkAddr)];
- while (db != NULL) {
- if (!memcmp(db->networkAddr, networkAddr, MAX_NETWORK_ADDR_LEN)) {
- if (!__nat25_has_expired(priv, db)) {
- /* replace the destination mac address */
- memcpy(skb->data, db->macAddr, ETH_ALEN);
- atomic_inc(&db->use_count);
-
- DEBUG_INFO("NAT25: Lookup M:%02x%02x%02x%02x%02x%02x N:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
- "%02x%02x%02x%02x%02x%02x\n",
- db->macAddr[0],
- db->macAddr[1],
- db->macAddr[2],
- db->macAddr[3],
- db->macAddr[4],
- db->macAddr[5],
- db->networkAddr[0],
- db->networkAddr[1],
- db->networkAddr[2],
- db->networkAddr[3],
- db->networkAddr[4],
- db->networkAddr[5],
- db->networkAddr[6],
- db->networkAddr[7],
- db->networkAddr[8],
- db->networkAddr[9],
- db->networkAddr[10],
- db->networkAddr[11],
- db->networkAddr[12],
- db->networkAddr[13],
- db->networkAddr[14],
- db->networkAddr[15],
- db->networkAddr[16]);
- }
- spin_unlock_bh(&priv->br_ext_lock);
- return 1;
- }
- db = db->next_hash;
- }
- spin_unlock_bh(&priv->br_ext_lock);
- return 0;
-}
-
-static void __nat25_db_network_insert(struct adapter *priv,
- unsigned char *macAddr, unsigned char *networkAddr)
-{
- struct nat25_network_db_entry *db;
- int hash;
-
- spin_lock_bh(&priv->br_ext_lock);
- hash = __nat25_network_hash(networkAddr);
- db = priv->nethash[hash];
- while (db != NULL) {
- if (!memcmp(db->networkAddr, networkAddr, MAX_NETWORK_ADDR_LEN)) {
- ether_addr_copy(db->macAddr, macAddr);
- db->ageing_timer = jiffies;
- spin_unlock_bh(&priv->br_ext_lock);
- return;
- }
- db = db->next_hash;
- }
- db = (struct nat25_network_db_entry *) rtw_malloc(sizeof(*db));
- if (db == NULL) {
- spin_unlock_bh(&priv->br_ext_lock);
- return;
- }
- memcpy(db->networkAddr, networkAddr, MAX_NETWORK_ADDR_LEN);
- ether_addr_copy(db->macAddr, macAddr);
- atomic_set(&db->use_count, 1);
- db->ageing_timer = jiffies;
-
- __network_hash_link(priv, db, hash);
-
- spin_unlock_bh(&priv->br_ext_lock);
-}
-
/*
* NAT2.5 interface
*/
spin_unlock_bh(&priv->br_ext_lock);
}
-int nat25_db_handle(struct adapter *priv, struct sk_buff *skb, int method)
-{
- unsigned short protocol;
- unsigned char networkAddr[MAX_NETWORK_ADDR_LEN];
- unsigned int tmp;
-
- if (skb == NULL)
- return -1;
-
- if ((method <= NAT25_MIN) || (method >= NAT25_MAX))
- return -1;
-
- protocol = be16_to_cpu(*((__be16 *)(skb->data + 2 * ETH_ALEN)));
-
- /*---------------------------------------------------*/
- /* Handle IP frame */
- /*---------------------------------------------------*/
- if (protocol == ETH_P_IP) {
- struct iphdr *iph = (struct iphdr *)(skb->data + ETH_HLEN);
-
- if (((unsigned char *)(iph) + (iph->ihl<<2)) >= (skb->data + ETH_HLEN + skb->len)) {
- DEBUG_WARN("NAT25: malformed IP packet !\n");
- return -1;
- }
-
- switch (method) {
- case NAT25_CHECK:
- return -1;
- case NAT25_INSERT:
- /* some multicast with source IP is all zero, maybe other case is illegal */
- /* in class A, B, C, host address is all zero or all one is illegal */
- if (iph->saddr == 0)
- return 0;
- tmp = be32_to_cpu(iph->saddr);
- DEBUG_INFO("NAT25: Insert IP, SA =%08x, DA =%08x\n", tmp, iph->daddr);
- __nat25_generate_ipv4_network_addr(networkAddr, &tmp);
- /* record source IP address and , source mac address into db */
- __nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr);
-
- return 0;
- case NAT25_LOOKUP:
- DEBUG_INFO("NAT25: Lookup IP, SA =%08x, DA =%08x\n", iph->saddr, iph->daddr);
- tmp = be32_to_cpu(iph->daddr);
- __nat25_generate_ipv4_network_addr(networkAddr, &tmp);
-
- if (!__nat25_db_network_lookup_and_replace(priv, skb, networkAddr)) {
- if (*((unsigned char *)&iph->daddr + 3) == 0xff) {
- /* L2 is unicast but L3 is broadcast, make L2 bacome broadcast */
- DEBUG_INFO("NAT25: Set DA as broadcast\n");
- memset(skb->data, 0xff, ETH_ALEN);
- } else {
- /* forward unknown IP packet to upper TCP/IP */
- DEBUG_INFO("NAT25: Replace DA with BR's MAC\n");
- if ((*(u32 *)priv->br_mac) == 0 && (*(u16 *)(priv->br_mac+4)) == 0) {
- netdev_info(skb->dev,
- "Re-init netdev_br_init() due to br_mac == 0!\n");
- netdev_br_init(priv->pnetdev);
- }
- memcpy(skb->data, priv->br_mac, ETH_ALEN);
- }
- }
- return 0;
- default:
- return -1;
- }
- } else if (protocol == ETH_P_ARP) {
- /*---------------------------------------------------*/
- /* Handle ARP frame */
- /*---------------------------------------------------*/
- struct arphdr *arp = (struct arphdr *)(skb->data + ETH_HLEN);
- unsigned char *arp_ptr = (unsigned char *)(arp + 1);
- unsigned int *sender, *target;
-
- if (arp->ar_pro != __constant_htons(ETH_P_IP)) {
- DEBUG_WARN("NAT25: arp protocol unknown (%4x)!\n", be16_to_cpu(arp->ar_pro));
- return -1;
- }
-
- switch (method) {
- case NAT25_CHECK:
- return 0; /* skb_copy for all ARP frame */
- case NAT25_INSERT:
- DEBUG_INFO("NAT25: Insert ARP, MAC =%02x%02x%02x%02x%02x%02x\n", arp_ptr[0],
- arp_ptr[1], arp_ptr[2], arp_ptr[3], arp_ptr[4], arp_ptr[5]);
-
- /* change to ARP sender mac address to wlan STA address */
- memcpy(arp_ptr, GET_MY_HWADDR(priv), ETH_ALEN);
- arp_ptr += arp->ar_hln;
- sender = (unsigned int *)arp_ptr;
- __nat25_generate_ipv4_network_addr(networkAddr, sender);
- __nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr);
- return 0;
- case NAT25_LOOKUP:
- DEBUG_INFO("NAT25: Lookup ARP\n");
-
- arp_ptr += arp->ar_hln;
- sender = (unsigned int *)arp_ptr;
- arp_ptr += (arp->ar_hln + arp->ar_pln);
- target = (unsigned int *)arp_ptr;
- __nat25_generate_ipv4_network_addr(networkAddr, target);
- __nat25_db_network_lookup_and_replace(priv, skb, networkAddr);
- /* change to ARP target mac address to Lookup result */
- arp_ptr = (unsigned char *)(arp + 1);
- arp_ptr += (arp->ar_hln + arp->ar_pln);
- memcpy(arp_ptr, skb->data, ETH_ALEN);
- return 0;
- default:
- return -1;
- }
- } else if ((protocol == ETH_P_IPX) ||
- (protocol <= ETH_FRAME_LEN)) {
- /*---------------------------------------------------*/
- /* Handle IPX and Apple Talk frame */
- /*---------------------------------------------------*/
- unsigned char ipx_header[2] = {0xFF, 0xFF};
- struct ipxhdr *ipx = NULL;
- struct elapaarp *ea = NULL;
- struct ddpehdr *ddp = NULL;
- unsigned char *framePtr = skb->data + ETH_HLEN;
-
- if (protocol == ETH_P_IPX) {
- DEBUG_INFO("NAT25: Protocol = IPX (Ethernet II)\n");
- ipx = (struct ipxhdr *)framePtr;
- } else if (protocol <= ETH_FRAME_LEN) {
- if (!memcmp(ipx_header, framePtr, 2)) {
- DEBUG_INFO("NAT25: Protocol = IPX (Ethernet 802.3)\n");
- ipx = (struct ipxhdr *)framePtr;
- } else {
- unsigned char ipx_8022_type = 0xE0;
- unsigned char snap_8022_type = 0xAA;
-
- if (*framePtr == snap_8022_type) {
- unsigned char ipx_snap_id[5] = {0x0, 0x0, 0x0, 0x81, 0x37}; /* IPX SNAP ID */
- unsigned char aarp_snap_id[5] = {0x00, 0x00, 0x00, 0x80, 0xF3}; /* Apple Talk AARP SNAP ID */
- unsigned char ddp_snap_id[5] = {0x08, 0x00, 0x07, 0x80, 0x9B}; /* Apple Talk DDP SNAP ID */
-
- framePtr += 3; /* eliminate the 802.2 header */
-
- if (!memcmp(ipx_snap_id, framePtr, 5)) {
- framePtr += 5; /* eliminate the SNAP header */
-
- DEBUG_INFO("NAT25: Protocol = IPX (Ethernet SNAP)\n");
- ipx = (struct ipxhdr *)framePtr;
- } else if (!memcmp(aarp_snap_id, framePtr, 5)) {
- framePtr += 5; /* eliminate the SNAP header */
-
- ea = (struct elapaarp *)framePtr;
- } else if (!memcmp(ddp_snap_id, framePtr, 5)) {
- framePtr += 5; /* eliminate the SNAP header */
-
- ddp = (struct ddpehdr *)framePtr;
- } else {
- DEBUG_WARN("NAT25: Protocol = Ethernet SNAP %02x%02x%02x%02x%02x\n", framePtr[0],
- framePtr[1], framePtr[2], framePtr[3], framePtr[4]);
- return -1;
- }
- } else if (*framePtr == ipx_8022_type) {
- framePtr += 3; /* eliminate the 802.2 header */
-
- if (!memcmp(ipx_header, framePtr, 2)) {
- DEBUG_INFO("NAT25: Protocol = IPX (Ethernet 802.2)\n");
- ipx = (struct ipxhdr *)framePtr;
- } else {
- return -1;
- }
- } else {
- return -1;
- }
- }
- } else {
- return -1;
- }
-
- /* IPX */
- if (ipx != NULL) {
- switch (method) {
- case NAT25_CHECK:
- if (!memcmp(skb->data+ETH_ALEN, ipx->ipx_source.node, ETH_ALEN))
- DEBUG_INFO("NAT25: Check IPX skb_copy\n");
- return 0;
- case NAT25_INSERT:
- DEBUG_INFO("NAT25: Insert IPX, Dest =%08x,%02x%02x%02x%02x%02x%02x,%04x Source =%08x,%02x%02x%02x%02x%02x%02x,%04x\n",
- ipx->ipx_dest.net,
- ipx->ipx_dest.node[0],
- ipx->ipx_dest.node[1],
- ipx->ipx_dest.node[2],
- ipx->ipx_dest.node[3],
- ipx->ipx_dest.node[4],
- ipx->ipx_dest.node[5],
- ipx->ipx_dest.sock,
- ipx->ipx_source.net,
- ipx->ipx_source.node[0],
- ipx->ipx_source.node[1],
- ipx->ipx_source.node[2],
- ipx->ipx_source.node[3],
- ipx->ipx_source.node[4],
- ipx->ipx_source.node[5],
- ipx->ipx_source.sock);
-
- if (!memcmp(skb->data+ETH_ALEN, ipx->ipx_source.node, ETH_ALEN)) {
- DEBUG_INFO("NAT25: Use IPX Net, and Socket as network addr\n");
-
- __nat25_generate_ipx_network_addr_with_socket(networkAddr, &ipx->ipx_source.net, &ipx->ipx_source.sock);
-
- /* change IPX source node addr to wlan STA address */
- memcpy(ipx->ipx_source.node, GET_MY_HWADDR(priv), ETH_ALEN);
- } else {
- __nat25_generate_ipx_network_addr_with_node(networkAddr, &ipx->ipx_source.net, ipx->ipx_source.node);
- }
- __nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr);
- return 0;
- case NAT25_LOOKUP:
- if (!memcmp(GET_MY_HWADDR(priv), ipx->ipx_dest.node, ETH_ALEN)) {
- DEBUG_INFO("NAT25: Lookup IPX, Modify Destination IPX Node addr\n");
-
- __nat25_generate_ipx_network_addr_with_socket(networkAddr, &ipx->ipx_dest.net, &ipx->ipx_dest.sock);
-
- __nat25_db_network_lookup_and_replace(priv, skb, networkAddr);
-
- /* replace IPX destination node addr with Lookup destination MAC addr */
- memcpy(ipx->ipx_dest.node, skb->data, ETH_ALEN);
- } else {
- __nat25_generate_ipx_network_addr_with_node(networkAddr, &ipx->ipx_dest.net, ipx->ipx_dest.node);
-
- __nat25_db_network_lookup_and_replace(priv, skb, networkAddr);
- }
- return 0;
- default:
- return -1;
- }
- } else if (ea != NULL) {
- /* Sanity check fields. */
- if (ea->hw_len != ETH_ALEN || ea->pa_len != AARP_PA_ALEN) {
- DEBUG_WARN("NAT25: Appletalk AARP Sanity check fail!\n");
- return -1;
- }
-
- switch (method) {
- case NAT25_CHECK:
- return 0;
- case NAT25_INSERT:
- /* change to AARP source mac address to wlan STA address */
- memcpy(ea->hw_src, GET_MY_HWADDR(priv), ETH_ALEN);
-
- DEBUG_INFO("NAT25: Insert AARP, Source =%d,%d Destination =%d,%d\n",
- ea->pa_src_net,
- ea->pa_src_node,
- ea->pa_dst_net,
- ea->pa_dst_node);
-
- __nat25_generate_apple_network_addr(networkAddr, &ea->pa_src_net, &ea->pa_src_node);
-
- __nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr);
-
- return 0;
- case NAT25_LOOKUP:
- DEBUG_INFO("NAT25: Lookup AARP, Source =%d,%d Destination =%d,%d\n",
- ea->pa_src_net,
- ea->pa_src_node,
- ea->pa_dst_net,
- ea->pa_dst_node);
-
- __nat25_generate_apple_network_addr(networkAddr, &ea->pa_dst_net, &ea->pa_dst_node);
-
- __nat25_db_network_lookup_and_replace(priv, skb, networkAddr);
-
- /* change to AARP destination mac address to Lookup result */
- memcpy(ea->hw_dst, skb->data, ETH_ALEN);
- return 0;
- default:
- return -1;
- }
- } else if (ddp != NULL) {
- switch (method) {
- case NAT25_CHECK:
- return -1;
- case NAT25_INSERT:
- DEBUG_INFO("NAT25: Insert DDP, Source =%d,%d Destination =%d,%d\n",
- ddp->deh_snet,
- ddp->deh_snode,
- ddp->deh_dnet,
- ddp->deh_dnode);
-
- __nat25_generate_apple_network_addr(networkAddr, &ddp->deh_snet, &ddp->deh_snode);
-
- __nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr);
-
- return 0;
- case NAT25_LOOKUP:
- DEBUG_INFO("NAT25: Lookup DDP, Source =%d,%d Destination =%d,%d\n",
- ddp->deh_snet,
- ddp->deh_snode,
- ddp->deh_dnet,
- ddp->deh_dnode);
- __nat25_generate_apple_network_addr(networkAddr, &ddp->deh_dnet, &ddp->deh_dnode);
- __nat25_db_network_lookup_and_replace(priv, skb, networkAddr);
- return 0;
- default:
- return -1;
- }
- }
-
- return -1;
- } else if ((protocol == ETH_P_PPP_DISC) ||
- (protocol == ETH_P_PPP_SES)) {
- /*---------------------------------------------------*/
- /* Handle PPPoE frame */
- /*---------------------------------------------------*/
- struct pppoe_hdr *ph = (struct pppoe_hdr *)(skb->data + ETH_HLEN);
- __be16 *pMagic;
-
- switch (method) {
- case NAT25_CHECK:
- if (ph->sid == 0)
- return 0;
- return 1;
- case NAT25_INSERT:
- if (ph->sid == 0) { /* Discovery phase according to tag */
- if (ph->code == PADI_CODE || ph->code == PADR_CODE) {
- if (priv->ethBrExtInfo.addPPPoETag) {
- struct pppoe_tag *tag, *pOldTag;
- unsigned char tag_buf[40];
- int old_tag_len = 0;
-
- tag = (struct pppoe_tag *)tag_buf;
- pOldTag = (struct pppoe_tag *)__nat25_find_pppoe_tag(ph, ntohs(PTT_RELAY_SID));
- if (pOldTag) { /* if SID existed, copy old value and delete it */
- old_tag_len = ntohs(pOldTag->tag_len);
- if (old_tag_len+TAG_HDR_LEN+MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN > sizeof(tag_buf)) {
- DEBUG_ERR("SID tag length too long!\n");
- return -1;
- }
-
- memcpy(tag->tag_data+MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN,
- pOldTag->tag_data, old_tag_len);
-
- if (skb_pull_and_merge(skb, (unsigned char *)pOldTag, TAG_HDR_LEN+old_tag_len) < 0) {
- DEBUG_ERR("call skb_pull_and_merge() failed in PADI/R packet!\n");
- return -1;
- }
- ph->length = htons(ntohs(ph->length)-TAG_HDR_LEN-old_tag_len);
- }
-
- tag->tag_type = PTT_RELAY_SID;
- tag->tag_len = htons(MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN+old_tag_len);
-
- /* insert the magic_code+client mac in relay tag */
- pMagic = (__be16 *)tag->tag_data;
- *pMagic = htons(MAGIC_CODE);
- memcpy(tag->tag_data+MAGIC_CODE_LEN, skb->data+ETH_ALEN, ETH_ALEN);
-
- /* Add relay tag */
- if (__nat25_add_pppoe_tag(skb, tag) < 0)
- return -1;
-
- DEBUG_INFO("NAT25: Insert PPPoE, forward %s packet\n",
- (ph->code == PADI_CODE ? "PADI" : "PADR"));
- } else { /* not add relay tag */
- if (priv->pppoe_connection_in_progress &&
- memcmp(skb->data+ETH_ALEN, priv->pppoe_addr, ETH_ALEN)) {
- DEBUG_ERR("Discard PPPoE packet due to another PPPoE connection is in progress!\n");
- return -2;
- }
-
- if (priv->pppoe_connection_in_progress == 0)
- memcpy(priv->pppoe_addr, skb->data+ETH_ALEN, ETH_ALEN);
-
- priv->pppoe_connection_in_progress = WAIT_TIME_PPPOE;
- }
- } else {
- return -1;
- }
- } else { /* session phase */
- DEBUG_INFO("NAT25: Insert PPPoE, insert session packet to %s\n", skb->dev->name);
-
- __nat25_generate_pppoe_network_addr(networkAddr, skb->data, &(ph->sid));
-
- __nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr);
-
-
- if (!priv->ethBrExtInfo.addPPPoETag &&
- priv->pppoe_connection_in_progress &&
- !memcmp(skb->data+ETH_ALEN, priv->pppoe_addr, ETH_ALEN))
- priv->pppoe_connection_in_progress = 0;
- }
- return 0;
- case NAT25_LOOKUP:
- if (ph->code == PADO_CODE || ph->code == PADS_CODE) {
- if (priv->ethBrExtInfo.addPPPoETag) {
- struct pppoe_tag *tag;
- unsigned char *ptr;
- unsigned short tagType, tagLen;
- int offset = 0;
-
- ptr = __nat25_find_pppoe_tag(ph, ntohs(PTT_RELAY_SID));
- if (ptr == NULL) {
- DEBUG_ERR("Fail to find PTT_RELAY_SID in FADO!\n");
- return -1;
- }
-
- tag = (struct pppoe_tag *)ptr;
- tagType = (unsigned short)((ptr[0] << 8) + ptr[1]);
- tagLen = (unsigned short)((ptr[2] << 8) + ptr[3]);
-
- if ((tagType != ntohs(PTT_RELAY_SID)) || (tagLen < (MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN))) {
- DEBUG_ERR("Invalid PTT_RELAY_SID tag length [%d]!\n", tagLen);
- return -1;
- }
-
- pMagic = (__be16 *)tag->tag_data;
- if (ntohs(*pMagic) != MAGIC_CODE) {
- DEBUG_ERR("Can't find MAGIC_CODE in %s packet!\n",
- (ph->code == PADO_CODE ? "PADO" : "PADS"));
- return -1;
- }
-
- memcpy(skb->data, tag->tag_data+MAGIC_CODE_LEN, ETH_ALEN);
-
- if (tagLen > MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN)
- offset = TAG_HDR_LEN;
-
- if (skb_pull_and_merge(skb, ptr+offset, TAG_HDR_LEN+MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN-offset) < 0) {
- DEBUG_ERR("call skb_pull_and_merge() failed in PADO packet!\n");
- return -1;
- }
- ph->length = htons(ntohs(ph->length)-(TAG_HDR_LEN+MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN-offset));
- if (offset > 0)
- tag->tag_len = htons(tagLen-MAGIC_CODE_LEN-RTL_RELAY_TAG_LEN);
-
- DEBUG_INFO("NAT25: Lookup PPPoE, forward %s Packet from %s\n",
- (ph->code == PADO_CODE ? "PADO" : "PADS"), skb->dev->name);
- } else { /* not add relay tag */
- if (!priv->pppoe_connection_in_progress) {
- DEBUG_ERR("Discard PPPoE packet due to no connection in progress!\n");
- return -1;
- }
- memcpy(skb->data, priv->pppoe_addr, ETH_ALEN);
- priv->pppoe_connection_in_progress = WAIT_TIME_PPPOE;
- }
- } else {
- if (ph->sid != 0) {
- DEBUG_INFO("NAT25: Lookup PPPoE, lookup session packet from %s\n", skb->dev->name);
- __nat25_generate_pppoe_network_addr(networkAddr, skb->data+ETH_ALEN, &(ph->sid));
- __nat25_db_network_lookup_and_replace(priv, skb, networkAddr);
- } else {
- return -1;
- }
- }
- return 0;
- default:
- return -1;
- }
- } else if (protocol == 0x888e) {
- /*---------------------------------------------------*/
- /* Handle EAP frame */
- /*---------------------------------------------------*/
- switch (method) {
- case NAT25_CHECK:
- return -1;
- case NAT25_INSERT:
- return 0;
- case NAT25_LOOKUP:
- return 0;
- default:
- return -1;
- }
- } else if ((protocol == 0xe2ae) || (protocol == 0xe2af)) {
- /*---------------------------------------------------*/
- /* Handle C-Media proprietary frame */
- /*---------------------------------------------------*/
- switch (method) {
- case NAT25_CHECK:
- return -1;
- case NAT25_INSERT:
- return 0;
- case NAT25_LOOKUP:
- return 0;
- default:
- return -1;
- }
- } else if (protocol == ETH_P_IPV6) {
- /*------------------------------------------------*/
- /* Handle IPV6 frame */
- /*------------------------------------------------*/
- struct ipv6hdr *iph = (struct ipv6hdr *)(skb->data + ETH_HLEN);
-
- if (sizeof(*iph) >= (skb->len - ETH_HLEN)) {
- DEBUG_WARN("NAT25: malformed IPv6 packet !\n");
- return -1;
- }
-
- switch (method) {
- case NAT25_CHECK:
- if (skb->data[0] & 1)
- return 0;
- return -1;
- case NAT25_INSERT:
- DEBUG_INFO("NAT25: Insert IP, SA =%4x:%4x:%4x:%4x:%4x:%4x:%4x:%4x,"
- " DA =%4x:%4x:%4x:%4x:%4x:%4x:%4x:%4x\n",
- iph->saddr.s6_addr16[0], iph->saddr.s6_addr16[1], iph->saddr.s6_addr16[2], iph->saddr.s6_addr16[3],
- iph->saddr.s6_addr16[4], iph->saddr.s6_addr16[5], iph->saddr.s6_addr16[6], iph->saddr.s6_addr16[7],
- iph->daddr.s6_addr16[0], iph->daddr.s6_addr16[1], iph->daddr.s6_addr16[2], iph->daddr.s6_addr16[3],
- iph->daddr.s6_addr16[4], iph->daddr.s6_addr16[5], iph->daddr.s6_addr16[6], iph->daddr.s6_addr16[7]);
-
- if (memcmp(&iph->saddr, "\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0", 16)) {
- __nat25_generate_ipv6_network_addr(networkAddr, (__be32 *)&iph->saddr);
- __nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr);
-
- if (iph->nexthdr == IPPROTO_ICMPV6 &&
- skb->len > (ETH_HLEN + sizeof(*iph) + 4)) {
- if (update_nd_link_layer_addr(skb->data + ETH_HLEN + sizeof(*iph),
- skb->len - ETH_HLEN - sizeof(*iph), GET_MY_HWADDR(priv))) {
- struct icmp6hdr *hdr = (struct icmp6hdr *)(skb->data + ETH_HLEN + sizeof(*iph));
- hdr->icmp6_cksum = 0;
- hdr->icmp6_cksum = csum_ipv6_magic(&iph->saddr, &iph->daddr,
- be16_to_cpu(iph->payload_len),
- IPPROTO_ICMPV6,
- csum_partial((__u8 *)hdr,
- be16_to_cpu(iph->payload_len), 0));
- }
- }
- }
- return 0;
- case NAT25_LOOKUP:
- DEBUG_INFO("NAT25: Lookup IP, SA =%4x:%4x:%4x:%4x:%4x:%4x:%4x:%4x, DA =%4x:%4x:%4x:%4x:%4x:%4x:%4x:%4x\n",
- iph->saddr.s6_addr16[0], iph->saddr.s6_addr16[1], iph->saddr.s6_addr16[2], iph->saddr.s6_addr16[3],
- iph->saddr.s6_addr16[4], iph->saddr.s6_addr16[5], iph->saddr.s6_addr16[6], iph->saddr.s6_addr16[7],
- iph->daddr.s6_addr16[0], iph->daddr.s6_addr16[1], iph->daddr.s6_addr16[2], iph->daddr.s6_addr16[3],
- iph->daddr.s6_addr16[4], iph->daddr.s6_addr16[5], iph->daddr.s6_addr16[6], iph->daddr.s6_addr16[7]);
- __nat25_generate_ipv6_network_addr(networkAddr, (__be32 *)&iph->daddr);
- __nat25_db_network_lookup_and_replace(priv, skb, networkAddr);
- return 0;
- default:
- return -1;
- }
- }
- return -1;
-}
-
#define SERVER_PORT 67
#define CLIENT_PORT 68
#define DHCP_MAGIC 0x63825363
projects / linux-beck.git / commitdiff