| 243e5182 |
1 | /****************************************************************************** |
| 2 | * |
| 3 | * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of version 2 of the GNU General Public License as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along with |
| 15 | * this program; if not, write to the Free Software Foundation, Inc., |
| 16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA |
| 17 | * |
| 18 | * |
| 19 | ******************************************************************************/ |
| 20 | #define _RTW_BR_EXT_C_ |
| 21 | |
| 22 | #ifdef __KERNEL__ |
| 23 | #include <linux/if_arp.h> |
| 24 | #include <net/ip.h> |
| 25 | #include <net/ipx.h> |
| 26 | #include <linux/atalk.h> |
| 27 | #include <linux/udp.h> |
| 28 | #include <linux/if_pppox.h> |
| 29 | #endif |
| 30 | |
| 31 | #if 1 // rtw_wifi_driver |
| 32 | #include <drv_conf.h> |
| 33 | #include <drv_types.h> |
| 34 | #include "rtw_br_ext.h" |
| 35 | #else // rtw_wifi_driver |
| 36 | #include "./8192cd_cfg.h" |
| 37 | |
| 38 | #ifndef __KERNEL__ |
| 39 | #include "./sys-support.h" |
| 40 | #endif |
| 41 | |
| 42 | #include "./8192cd.h" |
| 43 | #include "./8192cd_headers.h" |
| 44 | #include "./8192cd_br_ext.h" |
| 45 | #include "./8192cd_debug.h" |
| 46 | #endif // rtw_wifi_driver |
| 47 | |
| 48 | #ifdef CL_IPV6_PASS |
| 49 | #ifdef __KERNEL__ |
| 50 | #include <linux/ipv6.h> |
| 51 | #include <linux/icmpv6.h> |
| 52 | #include <net/ndisc.h> |
| 53 | #include <net/checksum.h> |
| ad20538d |
54 | #include <net/ip6_checksum.h> |
| 243e5182 |
55 | #endif |
| 56 | #endif |
| 57 | |
| 58 | #ifdef CONFIG_BR_EXT |
| 59 | |
| 60 | //#define BR_EXT_DEBUG |
| 61 | |
| 62 | #define NAT25_IPV4 01 |
| 63 | #define NAT25_IPV6 02 |
| 64 | #define NAT25_IPX 03 |
| 65 | #define NAT25_APPLE 04 |
| 66 | #define NAT25_PPPOE 05 |
| 67 | |
| 68 | #define RTL_RELAY_TAG_LEN (ETH_ALEN) |
| 69 | #define TAG_HDR_LEN 4 |
| 70 | |
| 71 | #define MAGIC_CODE 0x8186 |
| 72 | #define MAGIC_CODE_LEN 2 |
| 73 | #define WAIT_TIME_PPPOE 5 // waiting time for pppoe server in sec |
| 74 | |
| 75 | /*----------------------------------------------------------------- |
| 76 | How database records network address: |
| 77 | 0 1 2 3 4 5 6 7 8 9 10 |
| 78 | |----|----|----|----|----|----|----|----|----|----|----| |
| 79 | IPv4 |type| | IP addr | |
| 80 | IPX |type| Net addr | Node addr | |
| 81 | IPX |type| Net addr |Sckt addr| |
| 82 | Apple |type| Network |node| |
| 83 | PPPoE |type| SID | AC MAC | |
| 84 | -----------------------------------------------------------------*/ |
| 85 | |
| 86 | |
| 87 | //Find a tag in pppoe frame and return the pointer |
| 88 | static __inline__ unsigned char *__nat25_find_pppoe_tag(struct pppoe_hdr *ph, unsigned short type) |
| 89 | { |
| 90 | unsigned char *cur_ptr, *start_ptr; |
| 91 | unsigned short tagLen, tagType; |
| 92 | |
| 93 | start_ptr = cur_ptr = (unsigned char *)ph->tag; |
| 94 | while((cur_ptr - start_ptr) < ntohs(ph->length)) { |
| 95 | // prevent un-alignment access |
| 96 | tagType = (unsigned short)((cur_ptr[0] << 8) + cur_ptr[1]); |
| 97 | tagLen = (unsigned short)((cur_ptr[2] << 8) + cur_ptr[3]); |
| 98 | if(tagType == type) |
| 99 | return cur_ptr; |
| 100 | cur_ptr = cur_ptr + TAG_HDR_LEN + tagLen; |
| 101 | } |
| 102 | return 0; |
| 103 | } |
| 104 | |
| 105 | |
| 106 | static __inline__ int __nat25_add_pppoe_tag(struct sk_buff *skb, struct pppoe_tag *tag) |
| 107 | { |
| 108 | struct pppoe_hdr *ph = (struct pppoe_hdr *)(skb->data + ETH_HLEN); |
| 109 | int data_len; |
| 110 | |
| 111 | data_len = tag->tag_len + TAG_HDR_LEN; |
| 112 | if (skb_tailroom(skb) < data_len) { |
| 113 | _DEBUG_ERR("skb_tailroom() failed in add SID tag!\n"); |
| 114 | return -1; |
| 115 | } |
| 116 | |
| 117 | skb_put(skb, data_len); |
| 118 | // have a room for new tag |
| 119 | memmove(((unsigned char *)ph->tag + data_len), (unsigned char *)ph->tag, ntohs(ph->length)); |
| 120 | ph->length = htons(ntohs(ph->length) + data_len); |
| 121 | memcpy((unsigned char *)ph->tag, tag, data_len); |
| 122 | return data_len; |
| 123 | } |
| 124 | |
| 125 | static int skb_pull_and_merge(struct sk_buff *skb, unsigned char *src, int len) |
| 126 | { |
| 127 | int tail_len; |
| 128 | unsigned long end, tail; |
| 129 | |
| 130 | if ((src+len) > skb_tail_pointer(skb) || skb->len < len) |
| 131 | return -1; |
| 132 | |
| 133 | tail = (unsigned long)skb_tail_pointer(skb); |
| 134 | end = (unsigned long)src+len; |
| 135 | if (tail < end) |
| 136 | return -1; |
| 137 | |
| 138 | tail_len = (int)(tail-end); |
| 139 | if (tail_len > 0) |
| 140 | memmove(src, src+len, tail_len); |
| 141 | |
| 142 | skb_trim(skb, skb->len-len); |
| 143 | return 0; |
| 144 | } |
| 145 | |
| 146 | static __inline__ unsigned long __nat25_timeout(_adapter *priv) |
| 147 | { |
| 148 | unsigned long timeout; |
| 149 | |
| 150 | timeout = jiffies - NAT25_AGEING_TIME*HZ; |
| 151 | |
| 152 | return timeout; |
| 153 | } |
| 154 | |
| 155 | |
| 156 | static __inline__ int __nat25_has_expired(_adapter *priv, |
| 157 | struct nat25_network_db_entry *fdb) |
| 158 | { |
| 159 | if(time_before_eq(fdb->ageing_timer, __nat25_timeout(priv))) |
| 160 | return 1; |
| 161 | |
| 162 | return 0; |
| 163 | } |
| 164 | |
| 165 | |
| 166 | static __inline__ void __nat25_generate_ipv4_network_addr(unsigned char *networkAddr, |
| 167 | unsigned int *ipAddr) |
| 168 | { |
| 169 | memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN); |
| 170 | |
| 171 | networkAddr[0] = NAT25_IPV4; |
| 172 | memcpy(networkAddr+7, (unsigned char *)ipAddr, 4); |
| 173 | } |
| 174 | |
| 175 | |
| 176 | static __inline__ void __nat25_generate_ipx_network_addr_with_node(unsigned char *networkAddr, |
| 177 | unsigned int *ipxNetAddr, unsigned char *ipxNodeAddr) |
| 178 | { |
| 179 | memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN); |
| 180 | |
| 181 | networkAddr[0] = NAT25_IPX; |
| 182 | memcpy(networkAddr+1, (unsigned char *)ipxNetAddr, 4); |
| 183 | memcpy(networkAddr+5, ipxNodeAddr, 6); |
| 184 | } |
| 185 | |
| 186 | |
| 187 | static __inline__ void __nat25_generate_ipx_network_addr_with_socket(unsigned char *networkAddr, |
| 188 | unsigned int *ipxNetAddr, unsigned short *ipxSocketAddr) |
| 189 | { |
| 190 | memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN); |
| 191 | |
| 192 | networkAddr[0] = NAT25_IPX; |
| 193 | memcpy(networkAddr+1, (unsigned char *)ipxNetAddr, 4); |
| 194 | memcpy(networkAddr+5, (unsigned char *)ipxSocketAddr, 2); |
| 195 | } |
| 196 | |
| 197 | |
| 198 | static __inline__ void __nat25_generate_apple_network_addr(unsigned char *networkAddr, |
| 199 | unsigned short *network, unsigned char *node) |
| 200 | { |
| 201 | memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN); |
| 202 | |
| 203 | networkAddr[0] = NAT25_APPLE; |
| 204 | memcpy(networkAddr+1, (unsigned char *)network, 2); |
| 205 | networkAddr[3] = *node; |
| 206 | } |
| 207 | |
| 208 | |
| 209 | static __inline__ void __nat25_generate_pppoe_network_addr(unsigned char *networkAddr, |
| 210 | unsigned char *ac_mac, unsigned short *sid) |
| 211 | { |
| 212 | memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN); |
| 213 | |
| 214 | networkAddr[0] = NAT25_PPPOE; |
| 215 | memcpy(networkAddr+1, (unsigned char *)sid, 2); |
| 216 | memcpy(networkAddr+3, (unsigned char *)ac_mac, 6); |
| 217 | } |
| 218 | |
| 219 | |
| 220 | #ifdef CL_IPV6_PASS |
| 221 | static void __nat25_generate_ipv6_network_addr(unsigned char *networkAddr, |
| 222 | unsigned int *ipAddr) |
| 223 | { |
| 224 | memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN); |
| 225 | |
| 226 | networkAddr[0] = NAT25_IPV6; |
| 227 | memcpy(networkAddr+1, (unsigned char *)ipAddr, 16); |
| 228 | } |
| 229 | |
| 230 | |
| 231 | static unsigned char *scan_tlv(unsigned char *data, int len, unsigned char tag, unsigned char len8b) |
| 232 | { |
| 233 | while (len > 0) { |
| 234 | if (*data == tag && *(data+1) == len8b && len >= len8b*8) |
| 235 | return data+2; |
| 236 | |
| 237 | len -= (*(data+1))*8; |
| 238 | data += (*(data+1))*8; |
| 239 | } |
| 240 | return NULL; |
| 241 | } |
| 242 | |
| 243 | |
| 244 | static int update_nd_link_layer_addr(unsigned char *data, int len, unsigned char *replace_mac) |
| 245 | { |
| 246 | struct icmp6hdr *icmphdr = (struct icmp6hdr *)data; |
| 247 | unsigned char *mac; |
| 248 | |
| 249 | if (icmphdr->icmp6_type == NDISC_ROUTER_SOLICITATION) { |
| 250 | if (len >= 8) { |
| 251 | mac = scan_tlv(&data[8], len-8, 1, 1); |
| 252 | if (mac) { |
| 253 | _DEBUG_INFO("Router Solicitation, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n", |
| 254 | mac[0],mac[1],mac[2],mac[3],mac[4],mac[5], |
| 255 | replace_mac[0],replace_mac[1],replace_mac[2],replace_mac[3],replace_mac[4],replace_mac[5]); |
| 256 | memcpy(mac, replace_mac, 6); |
| 257 | return 1; |
| 258 | } |
| 259 | } |
| 260 | } |
| 261 | else if (icmphdr->icmp6_type == NDISC_ROUTER_ADVERTISEMENT) { |
| 262 | if (len >= 16) { |
| 263 | mac = scan_tlv(&data[16], len-16, 1, 1); |
| 264 | if (mac) { |
| 265 | _DEBUG_INFO("Router Advertisement, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n", |
| 266 | mac[0],mac[1],mac[2],mac[3],mac[4],mac[5], |
| 267 | replace_mac[0],replace_mac[1],replace_mac[2],replace_mac[3],replace_mac[4],replace_mac[5]); |
| 268 | memcpy(mac, replace_mac, 6); |
| 269 | return 1; |
| 270 | } |
| 271 | } |
| 272 | } |
| 273 | else if (icmphdr->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) { |
| 274 | if (len >= 24) { |
| 275 | mac = scan_tlv(&data[24], len-24, 1, 1); |
| 276 | if (mac) { |
| 277 | _DEBUG_INFO("Neighbor Solicitation, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n", |
| 278 | mac[0],mac[1],mac[2],mac[3],mac[4],mac[5], |
| 279 | replace_mac[0],replace_mac[1],replace_mac[2],replace_mac[3],replace_mac[4],replace_mac[5]); |
| 280 | memcpy(mac, replace_mac, 6); |
| 281 | return 1; |
| 282 | } |
| 283 | } |
| 284 | } |
| 285 | else if (icmphdr->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { |
| 286 | if (len >= 24) { |
| 287 | mac = scan_tlv(&data[24], len-24, 2, 1); |
| 288 | if (mac) { |
| 289 | _DEBUG_INFO("Neighbor Advertisement, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n", |
| 290 | mac[0],mac[1],mac[2],mac[3],mac[4],mac[5], |
| 291 | replace_mac[0],replace_mac[1],replace_mac[2],replace_mac[3],replace_mac[4],replace_mac[5]); |
| 292 | memcpy(mac, replace_mac, 6); |
| 293 | return 1; |
| 294 | } |
| 295 | } |
| 296 | } |
| 297 | else if (icmphdr->icmp6_type == NDISC_REDIRECT) { |
| 298 | if (len >= 40) { |
| 299 | mac = scan_tlv(&data[40], len-40, 2, 1); |
| 300 | if (mac) { |
| 301 | _DEBUG_INFO("Redirect, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n", |
| 302 | mac[0],mac[1],mac[2],mac[3],mac[4],mac[5], |
| 303 | replace_mac[0],replace_mac[1],replace_mac[2],replace_mac[3],replace_mac[4],replace_mac[5]); |
| 304 | memcpy(mac, replace_mac, 6); |
| 305 | return 1; |
| 306 | } |
| 307 | } |
| 308 | } |
| 309 | return 0; |
| 310 | } |
| 311 | |
| 312 | |
| 313 | static void convert_ipv6_mac_to_mc(struct sk_buff *skb) |
| 314 | { |
| 315 | struct ipv6hdr *iph = (struct ipv6hdr *)(skb->data + ETH_HLEN); |
| 316 | unsigned char *dst_mac = skb->data; |
| 317 | |
| 318 | //dst_mac[0] = 0xff; |
| 319 | //dst_mac[1] = 0xff; |
| 320 | /*modified by qinjunjie,ipv6 multicast address ix 0x33-33-xx-xx-xx-xx*/ |
| 321 | dst_mac[0] = 0x33; |
| 322 | dst_mac[1] = 0x33; |
| 323 | memcpy(&dst_mac[2], &iph->daddr.s6_addr32[3], 4); |
| 324 | #if defined(__LINUX_2_6__) |
| 325 | /*modified by qinjunjie,warning:should not remove next line*/ |
| 326 | skb->pkt_type = PACKET_MULTICAST; |
| 327 | #endif |
| 328 | } |
| 329 | #endif /* CL_IPV6_PASS */ |
| 330 | |
| 331 | |
| 332 | static __inline__ int __nat25_network_hash(unsigned char *networkAddr) |
| 333 | { |
| 334 | if(networkAddr[0] == NAT25_IPV4) |
| 335 | { |
| 336 | unsigned long x; |
| 337 | |
| 338 | x = networkAddr[7] ^ networkAddr[8] ^ networkAddr[9] ^ networkAddr[10]; |
| 339 | |
| 340 | return x & (NAT25_HASH_SIZE - 1); |
| 341 | } |
| 342 | else if(networkAddr[0] == NAT25_IPX) |
| 343 | { |
| 344 | unsigned long x; |
| 345 | |
| 346 | x = networkAddr[1] ^ networkAddr[2] ^ networkAddr[3] ^ networkAddr[4] ^ networkAddr[5] ^ |
| 347 | networkAddr[6] ^ networkAddr[7] ^ networkAddr[8] ^ networkAddr[9] ^ networkAddr[10]; |
| 348 | |
| 349 | return x & (NAT25_HASH_SIZE - 1); |
| 350 | } |
| 351 | else if(networkAddr[0] == NAT25_APPLE) |
| 352 | { |
| 353 | unsigned long x; |
| 354 | |
| 355 | x = networkAddr[1] ^ networkAddr[2] ^ networkAddr[3]; |
| 356 | |
| 357 | return x & (NAT25_HASH_SIZE - 1); |
| 358 | } |
| 359 | else if(networkAddr[0] == NAT25_PPPOE) |
| 360 | { |
| 361 | unsigned long x; |
| 362 | |
| 363 | x = networkAddr[0] ^ networkAddr[1] ^ networkAddr[2] ^ networkAddr[3] ^ networkAddr[4] ^ networkAddr[5] ^ networkAddr[6] ^ networkAddr[7] ^ networkAddr[8]; |
| 364 | |
| 365 | return x & (NAT25_HASH_SIZE - 1); |
| 366 | } |
| 367 | #ifdef CL_IPV6_PASS |
| 368 | else if(networkAddr[0] == NAT25_IPV6) |
| 369 | { |
| 370 | unsigned long x; |
| 371 | |
| 372 | x = networkAddr[1] ^ networkAddr[2] ^ networkAddr[3] ^ networkAddr[4] ^ networkAddr[5] ^ |
| 373 | networkAddr[6] ^ networkAddr[7] ^ networkAddr[8] ^ networkAddr[9] ^ networkAddr[10] ^ |
| 374 | networkAddr[11] ^ networkAddr[12] ^ networkAddr[13] ^ networkAddr[14] ^ networkAddr[15] ^ |
| 375 | networkAddr[16]; |
| 376 | |
| 377 | return x & (NAT25_HASH_SIZE - 1); |
| 378 | } |
| 379 | #endif |
| 380 | else |
| 381 | { |
| 382 | unsigned long x = 0; |
| 383 | int i; |
| 384 | |
| 385 | for (i=0; i<MAX_NETWORK_ADDR_LEN; i++) |
| 386 | x ^= networkAddr[i]; |
| 387 | |
| 388 | return x & (NAT25_HASH_SIZE - 1); |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | |
| 393 | static __inline__ void __network_hash_link(_adapter *priv, |
| 394 | struct nat25_network_db_entry *ent, int hash) |
| 395 | { |
| 396 | // Caller must _enter_critical_bh already! |
| 397 | //_irqL irqL; |
| 398 | //_enter_critical_bh(&priv->br_ext_lock, &irqL); |
| 399 | |
| 400 | ent->next_hash = priv->nethash[hash]; |
| 401 | if(ent->next_hash != NULL) |
| 402 | ent->next_hash->pprev_hash = &ent->next_hash; |
| 403 | priv->nethash[hash] = ent; |
| 404 | ent->pprev_hash = &priv->nethash[hash]; |
| 405 | |
| 406 | //_exit_critical_bh(&priv->br_ext_lock, &irqL); |
| 407 | } |
| 408 | |
| 409 | |
| 410 | static __inline__ void __network_hash_unlink(struct nat25_network_db_entry *ent) |
| 411 | { |
| 412 | // Caller must _enter_critical_bh already! |
| 413 | //_irqL irqL; |
| 414 | //_enter_critical_bh(&priv->br_ext_lock, &irqL); |
| 415 | |
| 416 | *(ent->pprev_hash) = ent->next_hash; |
| 417 | if(ent->next_hash != NULL) |
| 418 | ent->next_hash->pprev_hash = ent->pprev_hash; |
| 419 | ent->next_hash = NULL; |
| 420 | ent->pprev_hash = NULL; |
| 421 | |
| 422 | //_exit_critical_bh(&priv->br_ext_lock, &irqL); |
| 423 | } |
| 424 | |
| 425 | |
| 426 | static int __nat25_db_network_lookup_and_replace(_adapter *priv, |
| 427 | struct sk_buff *skb, unsigned char *networkAddr) |
| 428 | { |
| 429 | struct nat25_network_db_entry *db; |
| 430 | _irqL irqL; |
| 431 | _enter_critical_bh(&priv->br_ext_lock, &irqL); |
| 432 | |
| 433 | db = priv->nethash[__nat25_network_hash(networkAddr)]; |
| 434 | while (db != NULL) |
| 435 | { |
| 436 | if(!memcmp(db->networkAddr, networkAddr, MAX_NETWORK_ADDR_LEN)) |
| 437 | { |
| 438 | if(!__nat25_has_expired(priv, db)) |
| 439 | { |
| 440 | // replace the destination mac address |
| 441 | memcpy(skb->data, db->macAddr, ETH_ALEN); |
| 442 | atomic_inc(&db->use_count); |
| 443 | |
| 444 | #ifdef CL_IPV6_PASS |
| 445 | DEBUG_INFO("NAT25: Lookup M:%02x%02x%02x%02x%02x%02x N:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x" |
| 446 | "%02x%02x%02x%02x%02x%02x\n", |
| 447 | db->macAddr[0], |
| 448 | db->macAddr[1], |
| 449 | db->macAddr[2], |
| 450 | db->macAddr[3], |
| 451 | db->macAddr[4], |
| 452 | db->macAddr[5], |
| 453 | db->networkAddr[0], |
| 454 | db->networkAddr[1], |
| 455 | db->networkAddr[2], |
| 456 | db->networkAddr[3], |
| 457 | db->networkAddr[4], |
| 458 | db->networkAddr[5], |
| 459 | db->networkAddr[6], |
| 460 | db->networkAddr[7], |
| 461 | db->networkAddr[8], |
| 462 | db->networkAddr[9], |
| 463 | db->networkAddr[10], |
| 464 | db->networkAddr[11], |
| 465 | db->networkAddr[12], |
| 466 | db->networkAddr[13], |
| 467 | db->networkAddr[14], |
| 468 | db->networkAddr[15], |
| 469 | db->networkAddr[16]); |
| 470 | #else |
| 471 | DEBUG_INFO("NAT25: Lookup M:%02x%02x%02x%02x%02x%02x N:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n", |
| 472 | db->macAddr[0], |
| 473 | db->macAddr[1], |
| 474 | db->macAddr[2], |
| 475 | db->macAddr[3], |
| 476 | db->macAddr[4], |
| 477 | db->macAddr[5], |
| 478 | db->networkAddr[0], |
| 479 | db->networkAddr[1], |
| 480 | db->networkAddr[2], |
| 481 | db->networkAddr[3], |
| 482 | db->networkAddr[4], |
| 483 | db->networkAddr[5], |
| 484 | db->networkAddr[6], |
| 485 | db->networkAddr[7], |
| 486 | db->networkAddr[8], |
| 487 | db->networkAddr[9], |
| 488 | db->networkAddr[10]); |
| 489 | #endif |
| 490 | } |
| 491 | _exit_critical_bh(&priv->br_ext_lock, &irqL); |
| 492 | return 1; |
| 493 | } |
| 494 | |
| 495 | db = db->next_hash; |
| 496 | } |
| 497 | |
| 498 | _exit_critical_bh(&priv->br_ext_lock, &irqL); |
| 499 | return 0; |
| 500 | } |
| 501 | |
| 502 | |
| 503 | static void __nat25_db_network_insert(_adapter *priv, |
| 504 | unsigned char *macAddr, unsigned char *networkAddr) |
| 505 | { |
| 506 | struct nat25_network_db_entry *db; |
| 507 | int hash; |
| 508 | _irqL irqL; |
| 509 | _enter_critical_bh(&priv->br_ext_lock, &irqL); |
| 510 | |
| 511 | hash = __nat25_network_hash(networkAddr); |
| 512 | db = priv->nethash[hash]; |
| 513 | while (db != NULL) |
| 514 | { |
| 515 | if(!memcmp(db->networkAddr, networkAddr, MAX_NETWORK_ADDR_LEN)) |
| 516 | { |
| 517 | memcpy(db->macAddr, macAddr, ETH_ALEN); |
| 518 | db->ageing_timer = jiffies; |
| 519 | _exit_critical_bh(&priv->br_ext_lock, &irqL); |
| 520 | return; |
| 521 | } |
| 522 | |
| 523 | db = db->next_hash; |
| 524 | } |
| 525 | |
| 526 | db = (struct nat25_network_db_entry *) rtw_malloc(sizeof(*db)); |
| 527 | if(db == NULL) { |
| 528 | _exit_critical_bh(&priv->br_ext_lock, &irqL); |
| 529 | return; |
| 530 | } |
| 531 | |
| 532 | memcpy(db->networkAddr, networkAddr, MAX_NETWORK_ADDR_LEN); |
| 533 | memcpy(db->macAddr, macAddr, ETH_ALEN); |
| 534 | atomic_set(&db->use_count, 1); |
| 535 | db->ageing_timer = jiffies; |
| 536 | |
| 537 | __network_hash_link(priv, db, hash); |
| 538 | |
| 539 | _exit_critical_bh(&priv->br_ext_lock, &irqL); |
| 540 | } |
| 541 | |
| 542 | |
| 543 | static void __nat25_db_print(_adapter *priv) |
| 544 | { |
| 545 | _irqL irqL; |
| 546 | _enter_critical_bh(&priv->br_ext_lock, &irqL); |
| 547 | |
| 548 | #ifdef BR_EXT_DEBUG |
| 549 | static int counter = 0; |
| 550 | int i, j; |
| 551 | struct nat25_network_db_entry *db; |
| 552 | |
| 553 | counter++; |
| 554 | if((counter % 16) != 0) |
| 555 | return; |
| 556 | |
| 557 | for(i=0, j=0; i<NAT25_HASH_SIZE; i++) |
| 558 | { |
| 559 | db = priv->nethash[i]; |
| 560 | |
| 561 | while (db != NULL) |
| 562 | { |
| 563 | #ifdef CL_IPV6_PASS |
| 564 | panic_printk("NAT25: DB(%d) H(%02d) C(%d) M:%02x%02x%02x%02x%02x%02x N:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x" |
| 565 | "%02x%02x%02x%02x%02x%02x\n", |
| 566 | j, |
| 567 | i, |
| 568 | atomic_read(&db->use_count), |
| 569 | db->macAddr[0], |
| 570 | db->macAddr[1], |
| 571 | db->macAddr[2], |
| 572 | db->macAddr[3], |
| 573 | db->macAddr[4], |
| 574 | db->macAddr[5], |
| 575 | db->networkAddr[0], |
| 576 | db->networkAddr[1], |
| 577 | db->networkAddr[2], |
| 578 | db->networkAddr[3], |
| 579 | db->networkAddr[4], |
| 580 | db->networkAddr[5], |
| 581 | db->networkAddr[6], |
| 582 | db->networkAddr[7], |
| 583 | db->networkAddr[8], |
| 584 | db->networkAddr[9], |
| 585 | db->networkAddr[10], |
| 586 | db->networkAddr[11], |
| 587 | db->networkAddr[12], |
| 588 | db->networkAddr[13], |
| 589 | db->networkAddr[14], |
| 590 | db->networkAddr[15], |
| 591 | db->networkAddr[16]); |
| 592 | #else |
| 593 | panic_printk("NAT25: DB(%d) H(%02d) C(%d) M:%02x%02x%02x%02x%02x%02x N:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n", |
| 594 | j, |
| 595 | i, |
| 596 | atomic_read(&db->use_count), |
| 597 | db->macAddr[0], |
| 598 | db->macAddr[1], |
| 599 | db->macAddr[2], |
| 600 | db->macAddr[3], |
| 601 | db->macAddr[4], |
| 602 | db->macAddr[5], |
| 603 | db->networkAddr[0], |
| 604 | db->networkAddr[1], |
| 605 | db->networkAddr[2], |
| 606 | db->networkAddr[3], |
| 607 | db->networkAddr[4], |
| 608 | db->networkAddr[5], |
| 609 | db->networkAddr[6], |
| 610 | db->networkAddr[7], |
| 611 | db->networkAddr[8], |
| 612 | db->networkAddr[9], |
| 613 | db->networkAddr[10]); |
| 614 | #endif |
| 615 | j++; |
| 616 | |
| 617 | db = db->next_hash; |
| 618 | } |
| 619 | } |
| 620 | #endif |
| 621 | |
| 622 | _exit_critical_bh(&priv->br_ext_lock, &irqL); |
| 623 | } |
| 624 | |
| 625 | |
| 626 | |
| 627 | |
| 628 | /* |
| 629 | * NAT2.5 interface |
| 630 | */ |
| 631 | |
| 632 | void nat25_db_cleanup(_adapter *priv) |
| 633 | { |
| 634 | int i; |
| 635 | _irqL irqL; |
| 636 | _enter_critical_bh(&priv->br_ext_lock, &irqL); |
| 637 | |
| 638 | for(i=0; i<NAT25_HASH_SIZE; i++) |
| 639 | { |
| 640 | struct nat25_network_db_entry *f; |
| 641 | f = priv->nethash[i]; |
| 642 | while (f != NULL) { |
| 643 | struct nat25_network_db_entry *g; |
| 644 | |
| 645 | g = f->next_hash; |
| 646 | if(priv->scdb_entry == f) |
| 647 | { |
| 648 | memset(priv->scdb_mac, 0, ETH_ALEN); |
| 649 | memset(priv->scdb_ip, 0, 4); |
| 650 | priv->scdb_entry = NULL; |
| 651 | } |
| 652 | __network_hash_unlink(f); |
| 653 | rtw_mfree((u8 *) f, sizeof(struct nat25_network_db_entry)); |
| 654 | |
| 655 | f = g; |
| 656 | } |
| 657 | } |
| 658 | |
| 659 | _exit_critical_bh(&priv->br_ext_lock, &irqL); |
| 660 | } |
| 661 | |
| 662 | |
| 663 | void nat25_db_expire(_adapter *priv) |
| 664 | { |
| 665 | int i; |
| 666 | _irqL irqL; |
| 667 | _enter_critical_bh(&priv->br_ext_lock, &irqL); |
| 668 | |
| 669 | //if(!priv->ethBrExtInfo.nat25_disable) |
| 670 | { |
| 671 | for (i=0; i<NAT25_HASH_SIZE; i++) |
| 672 | { |
| 673 | struct nat25_network_db_entry *f; |
| 674 | f = priv->nethash[i]; |
| 675 | |
| 676 | while (f != NULL) |
| 677 | { |
| 678 | struct nat25_network_db_entry *g; |
| 679 | g = f->next_hash; |
| 680 | |
| 681 | if(__nat25_has_expired(priv, f)) |
| 682 | { |
| 683 | if(atomic_dec_and_test(&f->use_count)) |
| 684 | { |
| 685 | #ifdef BR_EXT_DEBUG |
| 686 | #ifdef CL_IPV6_PASS |
| 687 | panic_printk("NAT25 Expire H(%02d) M:%02x%02x%02x%02x%02x%02x N:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x" |
| 688 | "%02x%02x%02x%02x%02x%02x\n", |
| 689 | i, |
| 690 | f->macAddr[0], |
| 691 | f->macAddr[1], |
| 692 | f->macAddr[2], |
| 693 | f->macAddr[3], |
| 694 | f->macAddr[4], |
| 695 | f->macAddr[5], |
| 696 | f->networkAddr[0], |
| 697 | f->networkAddr[1], |
| 698 | f->networkAddr[2], |
| 699 | f->networkAddr[3], |
| 700 | f->networkAddr[4], |
| 701 | f->networkAddr[5], |
| 702 | f->networkAddr[6], |
| 703 | f->networkAddr[7], |
| 704 | f->networkAddr[8], |
| 705 | f->networkAddr[9], |
| 706 | f->networkAddr[10], |
| 707 | f->networkAddr[11], |
| 708 | f->networkAddr[12], |
| 709 | f->networkAddr[13], |
| 710 | f->networkAddr[14], |
| 711 | f->networkAddr[15], |
| 712 | f->networkAddr[16]); |
| 713 | #else |
| 714 | |
| 715 | panic_printk("NAT25 Expire H(%02d) M:%02x%02x%02x%02x%02x%02x N:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n", |
| 716 | i, |
| 717 | f->macAddr[0], |
| 718 | f->macAddr[1], |
| 719 | f->macAddr[2], |
| 720 | f->macAddr[3], |
| 721 | f->macAddr[4], |
| 722 | f->macAddr[5], |
| 723 | f->networkAddr[0], |
| 724 | f->networkAddr[1], |
| 725 | f->networkAddr[2], |
| 726 | f->networkAddr[3], |
| 727 | f->networkAddr[4], |
| 728 | f->networkAddr[5], |
| 729 | f->networkAddr[6], |
| 730 | f->networkAddr[7], |
| 731 | f->networkAddr[8], |
| 732 | f->networkAddr[9], |
| 733 | f->networkAddr[10]); |
| 734 | #endif |
| 735 | #endif |
| 736 | if(priv->scdb_entry == f) |
| 737 | { |
| 738 | memset(priv->scdb_mac, 0, ETH_ALEN); |
| 739 | memset(priv->scdb_ip, 0, 4); |
| 740 | priv->scdb_entry = NULL; |
| 741 | } |
| 742 | __network_hash_unlink(f); |
| 743 | rtw_mfree((u8 *) f, sizeof(struct nat25_network_db_entry)); |
| 744 | } |
| 745 | } |
| 746 | |
| 747 | f = g; |
| 748 | } |
| 749 | } |
| 750 | } |
| 751 | |
| 752 | _exit_critical_bh(&priv->br_ext_lock, &irqL); |
| 753 | } |
| 754 | |
| 755 | |
| 756 | #ifdef SUPPORT_TX_MCAST2UNI |
| 757 | static int checkIPMcAndReplace(_adapter *priv, struct sk_buff *skb, unsigned int *dst_ip) |
| 758 | { |
| 759 | struct stat_info *pstat; |
| 760 | struct list_head *phead, *plist; |
| 761 | int i; |
| 762 | |
| 763 | phead = &priv->asoc_list; |
| 764 | plist = phead->next; |
| 765 | |
| 766 | while (plist != phead) { |
| 767 | pstat = list_entry(plist, struct stat_info, asoc_list); |
| 768 | plist = plist->next; |
| 769 | |
| 770 | if (pstat->ipmc_num == 0) |
| 771 | continue; |
| 772 | |
| 773 | for (i=0; i<MAX_IP_MC_ENTRY; i++) { |
| 774 | if (pstat->ipmc[i].used && !memcmp(&pstat->ipmc[i].mcmac[3], ((unsigned char *)dst_ip)+1, 3)) { |
| 775 | memcpy(skb->data, pstat->ipmc[i].mcmac, ETH_ALEN); |
| 776 | return 1; |
| 777 | } |
| 778 | } |
| 779 | } |
| 780 | return 0; |
| 781 | } |
| 782 | #endif |
| 783 | |
| 784 | int nat25_db_handle(_adapter *priv, struct sk_buff *skb, int method) |
| 785 | { |
| 786 | unsigned short protocol; |
| 787 | unsigned char networkAddr[MAX_NETWORK_ADDR_LEN]; |
| 788 | |
| 789 | if(skb == NULL) |
| 790 | return -1; |
| 791 | |
| 792 | if((method <= NAT25_MIN) || (method >= NAT25_MAX)) |
| 793 | return -1; |
| 794 | |
| 795 | protocol = *((unsigned short *)(skb->data + 2 * ETH_ALEN)); |
| 796 | |
| 797 | /*---------------------------------------------------*/ |
| 798 | /* Handle IP frame */ |
| 799 | /*---------------------------------------------------*/ |
| 800 | if(protocol == __constant_htons(ETH_P_IP)) |
| 801 | { |
| 802 | struct iphdr* iph = (struct iphdr *)(skb->data + ETH_HLEN); |
| 803 | |
| 804 | if(((unsigned char*)(iph) + (iph->ihl<<2)) >= (skb->data + ETH_HLEN + skb->len)) |
| 805 | { |
| 806 | DEBUG_WARN("NAT25: malformed IP packet !\n"); |
| 807 | return -1; |
| 808 | } |
| 809 | |
| 810 | switch(method) |
| 811 | { |
| 812 | case NAT25_CHECK: |
| 813 | return -1; |
| 814 | |
| 815 | case NAT25_INSERT: |
| 816 | { |
| 817 | //some muticast with source IP is all zero, maybe other case is illegal |
| 818 | //in class A, B, C, host address is all zero or all one is illegal |
| 819 | if (iph->saddr == 0) |
| 820 | return 0; |
| 821 | DEBUG_INFO("NAT25: Insert IP, SA=%08x, DA=%08x\n", iph->saddr, iph->daddr); |
| 822 | __nat25_generate_ipv4_network_addr(networkAddr, &iph->saddr); |
| 823 | //record source IP address and , source mac address into db |
| 824 | __nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr); |
| 825 | |
| 826 | __nat25_db_print(priv); |
| 827 | } |
| 828 | return 0; |
| 829 | |
| 830 | case NAT25_LOOKUP: |
| 831 | { |
| 832 | DEBUG_INFO("NAT25: Lookup IP, SA=%08x, DA=%08x\n", iph->saddr, iph->daddr); |
| 833 | #ifdef SUPPORT_TX_MCAST2UNI |
| 834 | if (priv->pshare->rf_ft_var.mc2u_disable || |
| 835 | ((((OPMODE & (WIFI_STATION_STATE|WIFI_ASOC_STATE)) |
| 836 | == (WIFI_STATION_STATE|WIFI_ASOC_STATE)) && |
| 837 | !checkIPMcAndReplace(priv, skb, &iph->daddr)) || |
| 838 | (OPMODE & WIFI_ADHOC_STATE))) |
| 839 | #endif |
| 840 | { |
| 841 | __nat25_generate_ipv4_network_addr(networkAddr, &iph->daddr); |
| 842 | |
| 843 | if (!__nat25_db_network_lookup_and_replace(priv, skb, networkAddr)) { |
| 844 | if (*((unsigned char *)&iph->daddr + 3) == 0xff) { |
| 845 | // L2 is unicast but L3 is broadcast, make L2 bacome broadcast |
| 846 | DEBUG_INFO("NAT25: Set DA as boardcast\n"); |
| 847 | memset(skb->data, 0xff, ETH_ALEN); |
| 848 | } |
| 849 | else { |
| 850 | // forward unknow IP packet to upper TCP/IP |
| 851 | DEBUG_INFO("NAT25: Replace DA with BR's MAC\n"); |
| 852 | if ( (*(u32 *)priv->br_mac) == 0 && (*(u16 *)(priv->br_mac+4)) == 0 ) { |
| 853 | void netdev_br_init(struct net_device *netdev); |
| 854 | printk("Re-init netdev_br_init() due to br_mac==0!\n"); |
| 855 | netdev_br_init(priv->pnetdev); |
| 856 | } |
| 857 | memcpy(skb->data, priv->br_mac, ETH_ALEN); |
| 858 | } |
| 859 | } |
| 860 | } |
| 861 | } |
| 862 | return 0; |
| 863 | |
| 864 | default: |
| 865 | return -1; |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | /*---------------------------------------------------*/ |
| 870 | /* Handle ARP frame */ |
| 871 | /*---------------------------------------------------*/ |
| 872 | else if(protocol == __constant_htons(ETH_P_ARP)) |
| 873 | { |
| 874 | struct arphdr *arp = (struct arphdr *)(skb->data + ETH_HLEN); |
| 875 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); |
| 876 | unsigned int *sender, *target; |
| 877 | |
| 878 | if(arp->ar_pro != __constant_htons(ETH_P_IP)) |
| 879 | { |
| 880 | DEBUG_WARN("NAT25: arp protocol unknown (%4x)!\n", htons(arp->ar_pro)); |
| 881 | return -1; |
| 882 | } |
| 883 | |
| 884 | switch(method) |
| 885 | { |
| 886 | case NAT25_CHECK: |
| 887 | return 0; // skb_copy for all ARP frame |
| 888 | |
| 889 | case NAT25_INSERT: |
| 890 | { |
| 891 | DEBUG_INFO("NAT25: Insert ARP, MAC=%02x%02x%02x%02x%02x%02x\n", arp_ptr[0], |
| 892 | arp_ptr[1], arp_ptr[2], arp_ptr[3], arp_ptr[4], arp_ptr[5]); |
| 893 | |
| 894 | // change to ARP sender mac address to wlan STA address |
| 895 | memcpy(arp_ptr, GET_MY_HWADDR(priv), ETH_ALEN); |
| 896 | |
| 897 | arp_ptr += arp->ar_hln; |
| 898 | sender = (unsigned int *)arp_ptr; |
| 899 | |
| 900 | __nat25_generate_ipv4_network_addr(networkAddr, sender); |
| 901 | |
| 902 | __nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr); |
| 903 | |
| 904 | __nat25_db_print(priv); |
| 905 | } |
| 906 | return 0; |
| 907 | |
| 908 | case NAT25_LOOKUP: |
| 909 | { |
| 910 | DEBUG_INFO("NAT25: Lookup ARP\n"); |
| 911 | |
| 912 | arp_ptr += arp->ar_hln; |
| 913 | sender = (unsigned int *)arp_ptr; |
| 914 | arp_ptr += (arp->ar_hln + arp->ar_pln); |
| 915 | target = (unsigned int *)arp_ptr; |
| 916 | |
| 917 | __nat25_generate_ipv4_network_addr(networkAddr, target); |
| 918 | |
| 919 | __nat25_db_network_lookup_and_replace(priv, skb, networkAddr); |
| 920 | |
| 921 | // change to ARP target mac address to Lookup result |
| 922 | arp_ptr = (unsigned char *)(arp + 1); |
| 923 | arp_ptr += (arp->ar_hln + arp->ar_pln); |
| 924 | memcpy(arp_ptr, skb->data, ETH_ALEN); |
| 925 | } |
| 926 | return 0; |
| 927 | |
| 928 | default: |
| 929 | return -1; |
| 930 | } |
| 931 | } |
| 932 | |
| 933 | /*---------------------------------------------------*/ |
| 934 | /* Handle IPX and Apple Talk frame */ |
| 935 | /*---------------------------------------------------*/ |
| 936 | else if((protocol == __constant_htons(ETH_P_IPX)) || |
| 937 | (protocol <= __constant_htons(ETH_FRAME_LEN))) |
| 938 | { |
| 939 | unsigned char ipx_header[2] = {0xFF, 0xFF}; |
| 940 | struct ipxhdr *ipx = NULL; |
| 941 | struct elapaarp *ea = NULL; |
| 942 | struct ddpehdr *ddp = NULL; |
| 943 | unsigned char *framePtr = skb->data + ETH_HLEN; |
| 944 | |
| 945 | if(protocol == __constant_htons(ETH_P_IPX)) |
| 946 | { |
| 947 | DEBUG_INFO("NAT25: Protocol=IPX (Ethernet II)\n"); |
| 948 | ipx = (struct ipxhdr *)framePtr; |
| 949 | } |
| 950 | else if(protocol <= __constant_htons(ETH_FRAME_LEN)) |
| 951 | { |
| 952 | if(!memcmp(ipx_header, framePtr, 2)) |
| 953 | { |
| 954 | DEBUG_INFO("NAT25: Protocol=IPX (Ethernet 802.3)\n"); |
| 955 | ipx = (struct ipxhdr *)framePtr; |
| 956 | } |
| 957 | else |
| 958 | { |
| 959 | unsigned char ipx_8022_type = 0xE0; |
| 960 | unsigned char snap_8022_type = 0xAA; |
| 961 | |
| 962 | if(*framePtr == snap_8022_type) |
| 963 | { |
| 964 | unsigned char ipx_snap_id[5] = {0x0, 0x0, 0x0, 0x81, 0x37}; // IPX SNAP ID |
| 965 | unsigned char aarp_snap_id[5] = {0x00, 0x00, 0x00, 0x80, 0xF3}; // Apple Talk AARP SNAP ID |
| 966 | unsigned char ddp_snap_id[5] = {0x08, 0x00, 0x07, 0x80, 0x9B}; // Apple Talk DDP SNAP ID |
| 967 | |
| 968 | framePtr += 3; // eliminate the 802.2 header |
| 969 | |
| 970 | if(!memcmp(ipx_snap_id, framePtr, 5)) |
| 971 | { |
| 972 | framePtr += 5; // eliminate the SNAP header |
| 973 | |
| 974 | DEBUG_INFO("NAT25: Protocol=IPX (Ethernet SNAP)\n"); |
| 975 | ipx = (struct ipxhdr *)framePtr; |
| 976 | } |
| 977 | else if(!memcmp(aarp_snap_id, framePtr, 5)) |
| 978 | { |
| 979 | framePtr += 5; // eliminate the SNAP header |
| 980 | |
| 981 | ea = (struct elapaarp *)framePtr; |
| 982 | } |
| 983 | else if(!memcmp(ddp_snap_id, framePtr, 5)) |
| 984 | { |
| 985 | framePtr += 5; // eliminate the SNAP header |
| 986 | |
| 987 | ddp = (struct ddpehdr *)framePtr; |
| 988 | } |
| 989 | else |
| 990 | { |
| 991 | DEBUG_WARN("NAT25: Protocol=Ethernet SNAP %02x%02x%02x%02x%02x\n", framePtr[0], |
| 992 | framePtr[1], framePtr[2], framePtr[3], framePtr[4]); |
| 993 | return -1; |
| 994 | } |
| 995 | } |
| 996 | else if(*framePtr == ipx_8022_type) |
| 997 | { |
| 998 | framePtr += 3; // eliminate the 802.2 header |
| 999 | |
| 1000 | if(!memcmp(ipx_header, framePtr, 2)) |
| 1001 | { |
| 1002 | DEBUG_INFO("NAT25: Protocol=IPX (Ethernet 802.2)\n"); |
| 1003 | ipx = (struct ipxhdr *)framePtr; |
| 1004 | } |
| 1005 | else |
| 1006 | return -1; |
| 1007 | } |
| 1008 | else |
| 1009 | return -1; |
| 1010 | } |
| 1011 | } |
| 1012 | else |
| 1013 | return -1; |
| 1014 | |
| 1015 | /* IPX */ |
| 1016 | if(ipx != NULL) |
| 1017 | { |
| 1018 | switch(method) |
| 1019 | { |
| 1020 | case NAT25_CHECK: |
| 1021 | if(!memcmp(skb->data+ETH_ALEN, ipx->ipx_source.node, ETH_ALEN)) |
| 1022 | { |
| 1023 | DEBUG_INFO("NAT25: Check IPX skb_copy\n"); |
| 1024 | return 0; |
| 1025 | } |
| 1026 | return -1; |
| 1027 | |
| 1028 | case NAT25_INSERT: |
| 1029 | { |
| 1030 | DEBUG_INFO("NAT25: Insert IPX, Dest=%08x,%02x%02x%02x%02x%02x%02x,%04x Source=%08x,%02x%02x%02x%02x%02x%02x,%04x\n", |
| 1031 | ipx->ipx_dest.net, |
| 1032 | ipx->ipx_dest.node[0], |
| 1033 | ipx->ipx_dest.node[1], |
| 1034 | ipx->ipx_dest.node[2], |
| 1035 | ipx->ipx_dest.node[3], |
| 1036 | ipx->ipx_dest.node[4], |
| 1037 | ipx->ipx_dest.node[5], |
| 1038 | ipx->ipx_dest.sock, |
| 1039 | ipx->ipx_source.net, |
| 1040 | ipx->ipx_source.node[0], |
| 1041 | ipx->ipx_source.node[1], |
| 1042 | ipx->ipx_source.node[2], |
| 1043 | ipx->ipx_source.node[3], |
| 1044 | ipx->ipx_source.node[4], |
| 1045 | ipx->ipx_source.node[5], |
| 1046 | ipx->ipx_source.sock); |
| 1047 | |
| 1048 | if(!memcmp(skb->data+ETH_ALEN, ipx->ipx_source.node, ETH_ALEN)) |
| 1049 | { |
| 1050 | DEBUG_INFO("NAT25: Use IPX Net, and Socket as network addr\n"); |
| 1051 | |
| 1052 | __nat25_generate_ipx_network_addr_with_socket(networkAddr, &ipx->ipx_source.net, &ipx->ipx_source.sock); |
| 1053 | |
| 1054 | // change IPX source node addr to wlan STA address |
| 1055 | memcpy(ipx->ipx_source.node, GET_MY_HWADDR(priv), ETH_ALEN); |
| 1056 | } |
| 1057 | else |
| 1058 | { |
| 1059 | __nat25_generate_ipx_network_addr_with_node(networkAddr, &ipx->ipx_source.net, ipx->ipx_source.node); |
| 1060 | } |
| 1061 | |
| 1062 | __nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr); |
| 1063 | |
| 1064 | __nat25_db_print(priv); |
| 1065 | } |
| 1066 | return 0; |
| 1067 | |
| 1068 | case NAT25_LOOKUP: |
| 1069 | { |
| 1070 | if(!memcmp(GET_MY_HWADDR(priv), ipx->ipx_dest.node, ETH_ALEN)) |
| 1071 | { |
| 1072 | DEBUG_INFO("NAT25: Lookup IPX, Modify Destination IPX Node addr\n"); |
| 1073 | |
| 1074 | __nat25_generate_ipx_network_addr_with_socket(networkAddr, &ipx->ipx_dest.net, &ipx->ipx_dest.sock); |
| 1075 | |
| 1076 | __nat25_db_network_lookup_and_replace(priv, skb, networkAddr); |
| 1077 | |
| 1078 | // replace IPX destination node addr with Lookup destination MAC addr |
| 1079 | memcpy(ipx->ipx_dest.node, skb->data, ETH_ALEN); |
| 1080 | } |
| 1081 | else |
| 1082 | { |
| 1083 | __nat25_generate_ipx_network_addr_with_node(networkAddr, &ipx->ipx_dest.net, ipx->ipx_dest.node); |
| 1084 | |
| 1085 | __nat25_db_network_lookup_and_replace(priv, skb, networkAddr); |
| 1086 | } |
| 1087 | } |
| 1088 | return 0; |
| 1089 | |
| 1090 | default: |
| 1091 | return -1; |
| 1092 | } |
| 1093 | } |
| 1094 | |
| 1095 | /* AARP */ |
| 1096 | else if(ea != NULL) |
| 1097 | { |
| 1098 | /* Sanity check fields. */ |
| 1099 | if(ea->hw_len != ETH_ALEN || ea->pa_len != AARP_PA_ALEN) |
| 1100 | { |
| 1101 | DEBUG_WARN("NAT25: Appletalk AARP Sanity check fail!\n"); |
| 1102 | return -1; |
| 1103 | } |
| 1104 | |
| 1105 | switch(method) |
| 1106 | { |
| 1107 | case NAT25_CHECK: |
| 1108 | return 0; |
| 1109 | |
| 1110 | case NAT25_INSERT: |
| 1111 | { |
| 1112 | // change to AARP source mac address to wlan STA address |
| 1113 | memcpy(ea->hw_src, GET_MY_HWADDR(priv), ETH_ALEN); |
| 1114 | |
| 1115 | DEBUG_INFO("NAT25: Insert AARP, Source=%d,%d Destination=%d,%d\n", |
| 1116 | ea->pa_src_net, |
| 1117 | ea->pa_src_node, |
| 1118 | ea->pa_dst_net, |
| 1119 | ea->pa_dst_node); |
| 1120 | |
| 1121 | __nat25_generate_apple_network_addr(networkAddr, &ea->pa_src_net, &ea->pa_src_node); |
| 1122 | |
| 1123 | __nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr); |
| 1124 | |
| 1125 | __nat25_db_print(priv); |
| 1126 | } |
| 1127 | return 0; |
| 1128 | |
| 1129 | case NAT25_LOOKUP: |
| 1130 | { |
| 1131 | DEBUG_INFO("NAT25: Lookup AARP, Source=%d,%d Destination=%d,%d\n", |
| 1132 | ea->pa_src_net, |
| 1133 | ea->pa_src_node, |
| 1134 | ea->pa_dst_net, |
| 1135 | ea->pa_dst_node); |
| 1136 | |
| 1137 | __nat25_generate_apple_network_addr(networkAddr, &ea->pa_dst_net, &ea->pa_dst_node); |
| 1138 | |
| 1139 | __nat25_db_network_lookup_and_replace(priv, skb, networkAddr); |
| 1140 | |
| 1141 | // change to AARP destination mac address to Lookup result |
| 1142 | memcpy(ea->hw_dst, skb->data, ETH_ALEN); |
| 1143 | } |
| 1144 | return 0; |
| 1145 | |
| 1146 | default: |
| 1147 | return -1; |
| 1148 | } |
| 1149 | } |
| 1150 | |
| 1151 | /* DDP */ |
| 1152 | else if(ddp != NULL) |
| 1153 | { |
| 1154 | switch(method) |
| 1155 | { |
| 1156 | case NAT25_CHECK: |
| 1157 | return -1; |
| 1158 | |
| 1159 | case NAT25_INSERT: |
| 1160 | { |
| 1161 | DEBUG_INFO("NAT25: Insert DDP, Source=%d,%d Destination=%d,%d\n", |
| 1162 | ddp->deh_snet, |
| 1163 | ddp->deh_snode, |
| 1164 | ddp->deh_dnet, |
| 1165 | ddp->deh_dnode); |
| 1166 | |
| 1167 | __nat25_generate_apple_network_addr(networkAddr, &ddp->deh_snet, &ddp->deh_snode); |
| 1168 | |
| 1169 | __nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr); |
| 1170 | |
| 1171 | __nat25_db_print(priv); |
| 1172 | } |
| 1173 | return 0; |
| 1174 | |
| 1175 | case NAT25_LOOKUP: |
| 1176 | { |
| 1177 | DEBUG_INFO("NAT25: Lookup DDP, Source=%d,%d Destination=%d,%d\n", |
| 1178 | ddp->deh_snet, |
| 1179 | ddp->deh_snode, |
| 1180 | ddp->deh_dnet, |
| 1181 | ddp->deh_dnode); |
| 1182 | |
| 1183 | __nat25_generate_apple_network_addr(networkAddr, &ddp->deh_dnet, &ddp->deh_dnode); |
| 1184 | |
| 1185 | __nat25_db_network_lookup_and_replace(priv, skb, networkAddr); |
| 1186 | } |
| 1187 | return 0; |
| 1188 | |
| 1189 | default: |
| 1190 | return -1; |
| 1191 | } |
| 1192 | } |
| 1193 | |
| 1194 | return -1; |
| 1195 | } |
| 1196 | |
| 1197 | /*---------------------------------------------------*/ |
| 1198 | /* Handle PPPoE frame */ |
| 1199 | /*---------------------------------------------------*/ |
| 1200 | else if((protocol == __constant_htons(ETH_P_PPP_DISC)) || |
| 1201 | (protocol == __constant_htons(ETH_P_PPP_SES))) |
| 1202 | { |
| 1203 | struct pppoe_hdr *ph = (struct pppoe_hdr *)(skb->data + ETH_HLEN); |
| 1204 | unsigned short *pMagic; |
| 1205 | |
| 1206 | switch(method) |
| 1207 | { |
| 1208 | case NAT25_CHECK: |
| 1209 | if (ph->sid == 0) |
| 1210 | return 0; |
| 1211 | return 1; |
| 1212 | |
| 1213 | case NAT25_INSERT: |
| 1214 | if(ph->sid == 0) // Discovery phase according to tag |
| 1215 | { |
| 1216 | if(ph->code == PADI_CODE || ph->code == PADR_CODE) |
| 1217 | { |
| 1218 | if (priv->ethBrExtInfo.addPPPoETag) { |
| 1219 | struct pppoe_tag *tag, *pOldTag; |
| 1220 | unsigned char tag_buf[40]; |
| 1221 | int old_tag_len=0; |
| 1222 | |
| 1223 | tag = (struct pppoe_tag *)tag_buf; |
| 1224 | pOldTag = (struct pppoe_tag *)__nat25_find_pppoe_tag(ph, ntohs(PTT_RELAY_SID)); |
| 1225 | if (pOldTag) { // if SID existed, copy old value and delete it |
| 1226 | old_tag_len = ntohs(pOldTag->tag_len); |
| 1227 | if (old_tag_len+TAG_HDR_LEN+MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN > sizeof(tag_buf)) { |
| 1228 | DEBUG_ERR("SID tag length too long!\n"); |
| 1229 | return -1; |
| 1230 | } |
| 1231 | |
| 1232 | memcpy(tag->tag_data+MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN, |
| 1233 | pOldTag->tag_data, old_tag_len); |
| 1234 | |
| 1235 | if (skb_pull_and_merge(skb, (unsigned char *)pOldTag, TAG_HDR_LEN+old_tag_len) < 0) { |
| 1236 | DEBUG_ERR("call skb_pull_and_merge() failed in PADI/R packet!\n"); |
| 1237 | return -1; |
| 1238 | } |
| 1239 | ph->length = htons(ntohs(ph->length)-TAG_HDR_LEN-old_tag_len); |
| 1240 | } |
| 1241 | |
| 1242 | tag->tag_type = PTT_RELAY_SID; |
| 1243 | tag->tag_len = htons(MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN+old_tag_len); |
| 1244 | |
| 1245 | // insert the magic_code+client mac in relay tag |
| 1246 | pMagic = (unsigned short *)tag->tag_data; |
| 1247 | *pMagic = htons(MAGIC_CODE); |
| 1248 | memcpy(tag->tag_data+MAGIC_CODE_LEN, skb->data+ETH_ALEN, ETH_ALEN); |
| 1249 | |
| 1250 | //Add relay tag |
| 1251 | if(__nat25_add_pppoe_tag(skb, tag) < 0) |
| 1252 | return -1; |
| 1253 | |
| 1254 | DEBUG_INFO("NAT25: Insert PPPoE, forward %s packet\n", |
| 1255 | (ph->code == PADI_CODE ? "PADI" : "PADR")); |
| 1256 | } |
| 1257 | else { // not add relay tag |
| 1258 | if (priv->pppoe_connection_in_progress && |
| 1259 | memcmp(skb->data+ETH_ALEN, priv->pppoe_addr, ETH_ALEN)) { |
| 1260 | DEBUG_ERR("Discard PPPoE packet due to another PPPoE connection is in progress!\n"); |
| 1261 | return -2; |
| 1262 | } |
| 1263 | |
| 1264 | if (priv->pppoe_connection_in_progress == 0) |
| 1265 | memcpy(priv->pppoe_addr, skb->data+ETH_ALEN, ETH_ALEN); |
| 1266 | |
| 1267 | priv->pppoe_connection_in_progress = WAIT_TIME_PPPOE; |
| 1268 | } |
| 1269 | } |
| 1270 | else |
| 1271 | return -1; |
| 1272 | } |
| 1273 | else // session phase |
| 1274 | { |
| 1275 | DEBUG_INFO("NAT25: Insert PPPoE, insert session packet to %s\n", skb->dev->name); |
| 1276 | |
| 1277 | __nat25_generate_pppoe_network_addr(networkAddr, skb->data, &(ph->sid)); |
| 1278 | |
| 1279 | __nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr); |
| 1280 | |
| 1281 | __nat25_db_print(priv); |
| 1282 | |
| 1283 | if (!priv->ethBrExtInfo.addPPPoETag && |
| 1284 | priv->pppoe_connection_in_progress && |
| 1285 | !memcmp(skb->data+ETH_ALEN, priv->pppoe_addr, ETH_ALEN)) |
| 1286 | priv->pppoe_connection_in_progress = 0; |
| 1287 | } |
| 1288 | return 0; |
| 1289 | |
| 1290 | case NAT25_LOOKUP: |
| 1291 | if(ph->code == PADO_CODE || ph->code == PADS_CODE) |
| 1292 | { |
| 1293 | if (priv->ethBrExtInfo.addPPPoETag) { |
| 1294 | struct pppoe_tag *tag; |
| 1295 | unsigned char *ptr; |
| 1296 | unsigned short tagType, tagLen; |
| 1297 | int offset=0; |
| 1298 | |
| 1299 | if((ptr = __nat25_find_pppoe_tag(ph, ntohs(PTT_RELAY_SID))) == 0) { |
| 1300 | DEBUG_ERR("Fail to find PTT_RELAY_SID in FADO!\n"); |
| 1301 | return -1; |
| 1302 | } |
| 1303 | |
| 1304 | tag = (struct pppoe_tag *)ptr; |
| 1305 | tagType = (unsigned short)((ptr[0] << 8) + ptr[1]); |
| 1306 | tagLen = (unsigned short)((ptr[2] << 8) + ptr[3]); |
| 1307 | |
| 1308 | if((tagType != ntohs(PTT_RELAY_SID)) || (tagLen < (MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN))) { |
| 1309 | DEBUG_ERR("Invalid PTT_RELAY_SID tag length [%d]!\n", tagLen); |
| 1310 | return -1; |
| 1311 | } |
| 1312 | |
| 1313 | pMagic = (unsigned short *)tag->tag_data; |
| 1314 | if (ntohs(*pMagic) != MAGIC_CODE) { |
| 1315 | DEBUG_ERR("Can't find MAGIC_CODE in %s packet!\n", |
| 1316 | (ph->code == PADO_CODE ? "PADO" : "PADS")); |
| 1317 | return -1; |
| 1318 | } |
| 1319 | |
| 1320 | memcpy(skb->data, tag->tag_data+MAGIC_CODE_LEN, ETH_ALEN); |
| 1321 | |
| 1322 | if (tagLen > MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN) |
| 1323 | offset = TAG_HDR_LEN; |
| 1324 | |
| 1325 | if (skb_pull_and_merge(skb, ptr+offset, TAG_HDR_LEN+MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN-offset) < 0) { |
| 1326 | DEBUG_ERR("call skb_pull_and_merge() failed in PADO packet!\n"); |
| 1327 | return -1; |
| 1328 | } |
| 1329 | ph->length = htons(ntohs(ph->length)-(TAG_HDR_LEN+MAGIC_CODE_LEN+RTL_RELAY_TAG_LEN-offset)); |
| 1330 | if (offset > 0) |
| 1331 | tag->tag_len = htons(tagLen-MAGIC_CODE_LEN-RTL_RELAY_TAG_LEN); |
| 1332 | |
| 1333 | DEBUG_INFO("NAT25: Lookup PPPoE, forward %s Packet from %s\n", |
| 1334 | (ph->code == PADO_CODE ? "PADO" : "PADS"), skb->dev->name); |
| 1335 | } |
| 1336 | else { // not add relay tag |
| 1337 | if (!priv->pppoe_connection_in_progress) { |
| 1338 | DEBUG_ERR("Discard PPPoE packet due to no connection in progresss!\n"); |
| 1339 | return -1; |
| 1340 | } |
| 1341 | memcpy(skb->data, priv->pppoe_addr, ETH_ALEN); |
| 1342 | priv->pppoe_connection_in_progress = WAIT_TIME_PPPOE; |
| 1343 | } |
| 1344 | } |
| 1345 | else { |
| 1346 | if(ph->sid != 0) |
| 1347 | { |
| 1348 | DEBUG_INFO("NAT25: Lookup PPPoE, lookup session packet from %s\n", skb->dev->name); |
| 1349 | __nat25_generate_pppoe_network_addr(networkAddr, skb->data+ETH_ALEN, &(ph->sid)); |
| 1350 | |
| 1351 | __nat25_db_network_lookup_and_replace(priv, skb, networkAddr); |
| 1352 | |
| 1353 | __nat25_db_print(priv); |
| 1354 | } |
| 1355 | else |
| 1356 | return -1; |
| 1357 | |
| 1358 | } |
| 1359 | return 0; |
| 1360 | |
| 1361 | default: |
| 1362 | return -1; |
| 1363 | } |
| 1364 | } |
| 1365 | |
| 1366 | /*---------------------------------------------------*/ |
| 1367 | /* Handle EAP frame */ |
| 1368 | /*---------------------------------------------------*/ |
| 1369 | else if(protocol == __constant_htons(0x888e)) |
| 1370 | { |
| 1371 | switch(method) |
| 1372 | { |
| 1373 | case NAT25_CHECK: |
| 1374 | return -1; |
| 1375 | |
| 1376 | case NAT25_INSERT: |
| 1377 | return 0; |
| 1378 | |
| 1379 | case NAT25_LOOKUP: |
| 1380 | return 0; |
| 1381 | |
| 1382 | default: |
| 1383 | return -1; |
| 1384 | } |
| 1385 | } |
| 1386 | |
| 1387 | /*---------------------------------------------------*/ |
| 1388 | /* Handle C-Media proprietary frame */ |
| 1389 | /*---------------------------------------------------*/ |
| 1390 | else if((protocol == __constant_htons(0xe2ae)) || |
| 1391 | (protocol == __constant_htons(0xe2af))) |
| 1392 | { |
| 1393 | switch(method) |
| 1394 | { |
| 1395 | case NAT25_CHECK: |
| 1396 | return -1; |
| 1397 | |
| 1398 | case NAT25_INSERT: |
| 1399 | return 0; |
| 1400 | |
| 1401 | case NAT25_LOOKUP: |
| 1402 | return 0; |
| 1403 | |
| 1404 | default: |
| 1405 | return -1; |
| 1406 | } |
| 1407 | } |
| 1408 | |
| 1409 | /*---------------------------------------------------*/ |
| 1410 | /* Handle IPV6 frame */ |
| 1411 | /*---------------------------------------------------*/ |
| 1412 | #ifdef CL_IPV6_PASS |
| 1413 | else if(protocol == __constant_htons(ETH_P_IPV6)) |
| 1414 | { |
| 1415 | struct ipv6hdr *iph = (struct ipv6hdr *)(skb->data + ETH_HLEN); |
| 1416 | |
| 1417 | if (sizeof(*iph) >= (skb->len - ETH_HLEN)) |
| 1418 | { |
| 1419 | DEBUG_WARN("NAT25: malformed IPv6 packet !\n"); |
| 1420 | return -1; |
| 1421 | } |
| 1422 | |
| 1423 | switch(method) |
| 1424 | { |
| 1425 | case NAT25_CHECK: |
| 1426 | if (skb->data[0] & 1) |
| 1427 | return 0; |
| 1428 | return -1; |
| 1429 | |
| 1430 | case NAT25_INSERT: |
| 1431 | { |
| 1432 | DEBUG_INFO("NAT25: Insert IP, SA=%4x:%4x:%4x:%4x:%4x:%4x:%4x:%4x," |
| 1433 | " DA=%4x:%4x:%4x:%4x:%4x:%4x:%4x:%4x\n", |
| 1434 | iph->saddr.s6_addr16[0],iph->saddr.s6_addr16[1],iph->saddr.s6_addr16[2],iph->saddr.s6_addr16[3], |
| 1435 | iph->saddr.s6_addr16[4],iph->saddr.s6_addr16[5],iph->saddr.s6_addr16[6],iph->saddr.s6_addr16[7], |
| 1436 | iph->daddr.s6_addr16[0],iph->daddr.s6_addr16[1],iph->daddr.s6_addr16[2],iph->daddr.s6_addr16[3], |
| 1437 | iph->daddr.s6_addr16[4],iph->daddr.s6_addr16[5],iph->daddr.s6_addr16[6],iph->daddr.s6_addr16[7]); |
| 1438 | |
| 1439 | if (memcmp(&iph->saddr, "\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0", 16)) { |
| 1440 | __nat25_generate_ipv6_network_addr(networkAddr, (unsigned int *)&iph->saddr); |
| 1441 | __nat25_db_network_insert(priv, skb->data+ETH_ALEN, networkAddr); |
| 1442 | __nat25_db_print(priv); |
| 1443 | |
| 1444 | if (iph->nexthdr == IPPROTO_ICMPV6 && |
| 1445 | skb->len > (ETH_HLEN + sizeof(*iph) + 4)) { |
| 1446 | if (update_nd_link_layer_addr(skb->data + ETH_HLEN + sizeof(*iph), |
| 1447 | skb->len - ETH_HLEN - sizeof(*iph), GET_MY_HWADDR(priv))) { |
| 1448 | struct icmp6hdr *hdr = (struct icmp6hdr *)(skb->data + ETH_HLEN + sizeof(*iph)); |
| 1449 | hdr->icmp6_cksum = 0; |
| 1450 | hdr->icmp6_cksum = csum_ipv6_magic(&iph->saddr, &iph->daddr, |
| 1451 | iph->payload_len, |
| 1452 | IPPROTO_ICMPV6, |
| 1453 | csum_partial((__u8 *)hdr, iph->payload_len, 0)); |
| 1454 | } |
| 1455 | } |
| 1456 | } |
| 1457 | } |
| 1458 | return 0; |
| 1459 | |
| 1460 | case NAT25_LOOKUP: |
| 1461 | DEBUG_INFO("NAT25: Lookup IP, SA=%4x:%4x:%4x:%4x:%4x:%4x:%4x:%4x," |
| 1462 | " DA=%4x:%4x:%4x:%4x:%4x:%4x:%4x:%4x\n", |
| 1463 | iph->saddr.s6_addr16[0],iph->saddr.s6_addr16[1],iph->saddr.s6_addr16[2],iph->saddr.s6_addr16[3], |
| 1464 | iph->saddr.s6_addr16[4],iph->saddr.s6_addr16[5],iph->saddr.s6_addr16[6],iph->saddr.s6_addr16[7], |
| 1465 | iph->daddr.s6_addr16[0],iph->daddr.s6_addr16[1],iph->daddr.s6_addr16[2],iph->daddr.s6_addr16[3], |
| 1466 | iph->daddr.s6_addr16[4],iph->daddr.s6_addr16[5],iph->daddr.s6_addr16[6],iph->daddr.s6_addr16[7]); |
| 1467 | |
| 1468 | |
| 1469 | __nat25_generate_ipv6_network_addr(networkAddr, (unsigned int *)&iph->daddr); |
| 1470 | if (!__nat25_db_network_lookup_and_replace(priv, skb, networkAddr)) { |
| 1471 | #ifdef SUPPORT_RX_UNI2MCAST |
| 1472 | if (iph->daddr.s6_addr[0] == 0xff) |
| 1473 | convert_ipv6_mac_to_mc(skb); |
| 1474 | #endif |
| 1475 | } |
| 1476 | return 0; |
| 1477 | |
| 1478 | default: |
| 1479 | return -1; |
| 1480 | } |
| 1481 | } |
| 1482 | #endif // CL_IPV6_PASS |
| 1483 | |
| 1484 | return -1; |
| 1485 | } |
| 1486 | |
| 1487 | |
| 1488 | int nat25_handle_frame(_adapter *priv, struct sk_buff *skb) |
| 1489 | { |
| 1490 | #ifdef BR_EXT_DEBUG |
| 1491 | if((!priv->ethBrExtInfo.nat25_disable) && (!(skb->data[0] & 1))) |
| 1492 | { |
| 1493 | panic_printk("NAT25: Input Frame: DA=%02x%02x%02x%02x%02x%02x SA=%02x%02x%02x%02x%02x%02x\n", |
| 1494 | skb->data[0], |
| 1495 | skb->data[1], |
| 1496 | skb->data[2], |
| 1497 | skb->data[3], |
| 1498 | skb->data[4], |
| 1499 | skb->data[5], |
| 1500 | skb->data[6], |
| 1501 | skb->data[7], |
| 1502 | skb->data[8], |
| 1503 | skb->data[9], |
| 1504 | skb->data[10], |
| 1505 | skb->data[11]); |
| 1506 | } |
| 1507 | #endif |
| 1508 | |
| 1509 | if(!(skb->data[0] & 1)) |
| 1510 | { |
| 1511 | int is_vlan_tag=0, i, retval=0; |
| 1512 | unsigned short vlan_hdr=0; |
| 1513 | |
| 1514 | if (*((unsigned short *)(skb->data+ETH_ALEN*2)) == __constant_htons(ETH_P_8021Q)) { |
| 1515 | is_vlan_tag = 1; |
| 1516 | vlan_hdr = *((unsigned short *)(skb->data+ETH_ALEN*2+2)); |
| 1517 | for (i=0; i<6; i++) |
| 1518 | *((unsigned short *)(skb->data+ETH_ALEN*2+2-i*2)) = *((unsigned short *)(skb->data+ETH_ALEN*2-2-i*2)); |
| 1519 | skb_pull(skb, 4); |
| 1520 | } |
| 1521 | |
| 1522 | if (!priv->ethBrExtInfo.nat25_disable) |
| 1523 | { |
| 1524 | _irqL irqL; |
| 1525 | _enter_critical_bh(&priv->br_ext_lock, &irqL); |
| 1526 | /* |
| 1527 | * This function look up the destination network address from |
| 1528 | * the NAT2.5 database. Return value = -1 means that the |
| 1529 | * corresponding network protocol is NOT support. |
| 1530 | */ |
| 1531 | if (!priv->ethBrExtInfo.nat25sc_disable && |
| 1532 | (*((unsigned short *)(skb->data+ETH_ALEN*2)) == __constant_htons(ETH_P_IP)) && |
| 1533 | !memcmp(priv->scdb_ip, skb->data+ETH_HLEN+16, 4)) { |
| 1534 | memcpy(skb->data, priv->scdb_mac, ETH_ALEN); |
| 1535 | |
| 1536 | _exit_critical_bh(&priv->br_ext_lock, &irqL); |
| 1537 | } |
| 1538 | else { |
| 1539 | _exit_critical_bh(&priv->br_ext_lock, &irqL); |
| 1540 | |
| 1541 | retval = nat25_db_handle(priv, skb, NAT25_LOOKUP); |
| 1542 | } |
| 1543 | } |
| 1544 | else { |
| 1545 | if (((*((unsigned short *)(skb->data+ETH_ALEN*2)) == __constant_htons(ETH_P_IP)) && |
| 1546 | !memcmp(priv->br_ip, skb->data+ETH_HLEN+16, 4)) || |
| 1547 | ((*((unsigned short *)(skb->data+ETH_ALEN*2)) == __constant_htons(ETH_P_ARP)) && |
| 1548 | !memcmp(priv->br_ip, skb->data+ETH_HLEN+24, 4))) { |
| 1549 | // for traffic to upper TCP/IP |
| 1550 | retval = nat25_db_handle(priv, skb, NAT25_LOOKUP); |
| 1551 | } |
| 1552 | } |
| 1553 | |
| 1554 | if (is_vlan_tag) { |
| 1555 | skb_push(skb, 4); |
| 1556 | for (i=0; i<6; i++) |
| 1557 | *((unsigned short *)(skb->data+i*2)) = *((unsigned short *)(skb->data+4+i*2)); |
| 1558 | *((unsigned short *)(skb->data+ETH_ALEN*2)) = __constant_htons(ETH_P_8021Q); |
| 1559 | *((unsigned short *)(skb->data+ETH_ALEN*2+2)) = vlan_hdr; |
| 1560 | } |
| 1561 | |
| 1562 | if(retval == -1) { |
| 1563 | //DEBUG_ERR("NAT25: Lookup fail!\n"); |
| 1564 | return -1; |
| 1565 | } |
| 1566 | } |
| 1567 | |
| 1568 | return 0; |
| 1569 | } |
| 1570 | |
| 1571 | #if 0 |
| 1572 | void mac_clone(_adapter *priv, unsigned char *addr) |
| 1573 | { |
| 1574 | struct sockaddr sa; |
| 1575 | |
| 1576 | memcpy(sa.sa_data, addr, ETH_ALEN); |
| 1577 | DEBUG_INFO("MAC Clone: Addr=%02x%02x%02x%02x%02x%02x\n", |
| 1578 | addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); |
| 1579 | rtl8192cd_set_hwaddr(priv->dev, &sa); |
| 1580 | } |
| 1581 | |
| 1582 | |
| 1583 | int mac_clone_handle_frame(_adapter *priv, struct sk_buff *skb) |
| 1584 | { |
| 1585 | if(priv->ethBrExtInfo.macclone_enable && !priv->macclone_completed) |
| 1586 | { |
| 1587 | if(!(skb->data[ETH_ALEN] & 1)) //// check any other particular MAC add |
| 1588 | { |
| 1589 | if(memcmp(skb->data+ETH_ALEN, GET_MY_HWADDR(priv), ETH_ALEN) && |
| 1590 | ((priv->dev->br_port) && |
| 1591 | memcmp(skb->data+ETH_ALEN, priv->br_mac, ETH_ALEN))) |
| 1592 | { |
| 1593 | mac_clone(priv, skb->data+ETH_ALEN); |
| 1594 | priv->macclone_completed = 1; |
| 1595 | } |
| 1596 | } |
| 1597 | } |
| 1598 | |
| 1599 | return 0; |
| 1600 | } |
| 1601 | #endif // 0 |
| 1602 | |
| 1603 | #define SERVER_PORT 67 |
| 1604 | #define CLIENT_PORT 68 |
| 1605 | #define DHCP_MAGIC 0x63825363 |
| 1606 | #define BROADCAST_FLAG 0x8000 |
| 1607 | |
| 1608 | struct dhcpMessage { |
| 1609 | u_int8_t op; |
| 1610 | u_int8_t htype; |
| 1611 | u_int8_t hlen; |
| 1612 | u_int8_t hops; |
| 1613 | u_int32_t xid; |
| 1614 | u_int16_t secs; |
| 1615 | u_int16_t flags; |
| 1616 | u_int32_t ciaddr; |
| 1617 | u_int32_t yiaddr; |
| 1618 | u_int32_t siaddr; |
| 1619 | u_int32_t giaddr; |
| 1620 | u_int8_t chaddr[16]; |
| 1621 | u_int8_t sname[64]; |
| 1622 | u_int8_t file[128]; |
| 1623 | u_int32_t cookie; |
| 1624 | u_int8_t options[308]; /* 312 - cookie */ |
| 1625 | }; |
| 1626 | |
| 1627 | void dhcp_flag_bcast(_adapter *priv, struct sk_buff *skb) |
| 1628 | { |
| 1629 | if(skb == NULL) |
| 1630 | return; |
| 1631 | |
| 1632 | if(!priv->ethBrExtInfo.dhcp_bcst_disable) |
| 1633 | { |
| 1634 | unsigned short protocol = *((unsigned short *)(skb->data + 2 * ETH_ALEN)); |
| 1635 | |
| 1636 | if(protocol == __constant_htons(ETH_P_IP)) // IP |
| 1637 | { |
| 1638 | struct iphdr* iph = (struct iphdr *)(skb->data + ETH_HLEN); |
| 1639 | |
| 1640 | if(iph->protocol == IPPROTO_UDP) // UDP |
| 1641 | { |
| 1642 | struct udphdr *udph = (struct udphdr *)((SIZE_PTR)iph + (iph->ihl << 2)); |
| 1643 | |
| 1644 | if((udph->source == __constant_htons(CLIENT_PORT)) |
| 1645 | && (udph->dest == __constant_htons(SERVER_PORT))) // DHCP request |
| 1646 | { |
| 1647 | struct dhcpMessage *dhcph = |
| 1648 | (struct dhcpMessage *)((SIZE_PTR)udph + sizeof(struct udphdr)); |
| 1649 | |
| 1650 | if(dhcph->cookie == __constant_htonl(DHCP_MAGIC)) // match magic word |
| 1651 | { |
| 1652 | if(!(dhcph->flags & htons(BROADCAST_FLAG))) // if not broadcast |
| 1653 | { |
| 1654 | register int sum = 0; |
| 1655 | |
| 1656 | DEBUG_INFO("DHCP: change flag of DHCP request to broadcast.\n"); |
| 1657 | // or BROADCAST flag |
| 1658 | dhcph->flags |= htons(BROADCAST_FLAG); |
| 1659 | // recalculate checksum |
| 1660 | sum = ~(udph->check) & 0xffff; |
| 1661 | sum += dhcph->flags; |
| 1662 | while(sum >> 16) |
| 1663 | sum = (sum & 0xffff) + (sum >> 16); |
| 1664 | udph->check = ~sum; |
| 1665 | } |
| 1666 | } |
| 1667 | } |
| 1668 | } |
| 1669 | } |
| 1670 | } |
| 1671 | } |
| 1672 | |
| 1673 | |
| 1674 | void *scdb_findEntry(_adapter *priv, unsigned char *macAddr, |
| 1675 | unsigned char *ipAddr) |
| 1676 | { |
| 1677 | unsigned char networkAddr[MAX_NETWORK_ADDR_LEN]; |
| 1678 | struct nat25_network_db_entry *db; |
| 1679 | int hash; |
| 1680 | //_irqL irqL; |
| 1681 | //_enter_critical_bh(&priv->br_ext_lock, &irqL); |
| 1682 | |
| 1683 | __nat25_generate_ipv4_network_addr(networkAddr, (unsigned int *)ipAddr); |
| 1684 | hash = __nat25_network_hash(networkAddr); |
| 1685 | db = priv->nethash[hash]; |
| 1686 | while (db != NULL) |
| 1687 | { |
| 1688 | if(!memcmp(db->networkAddr, networkAddr, MAX_NETWORK_ADDR_LEN)) { |
| 1689 | //_exit_critical_bh(&priv->br_ext_lock, &irqL); |
| 1690 | return (void *)db; |
| 1691 | } |
| 1692 | |
| 1693 | db = db->next_hash; |
| 1694 | } |
| 1695 | |
| 1696 | //_exit_critical_bh(&priv->br_ext_lock, &irqL); |
| 1697 | return NULL; |
| 1698 | } |
| 1699 | |
| 1700 | #endif // CONFIG_BR_EXT |
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