+++ /dev/null
-/******************************************************************************
- *
- * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
- *
- *
- ******************************************************************************/
-#define _RTW_BR_EXT_C_
-
-#include <linux/if_arp.h>
-#include <net/ip.h>
-#include <net/ipx.h>
-#include <linux/atalk.h>
-#include <linux/udp.h>
-#include <linux/if_pppox.h>
-
-#include <drv_types.h>
-#include "rtw_br_ext.h"
-#include <usb_osintf.h>
-#include <recv_osdep.h>
-
-#ifndef csum_ipv6_magic
-#include <net/ip6_checksum.h>
-#endif
-
-#include <linux/ipv6.h>
-#include <linux/icmpv6.h>
-#include <net/ndisc.h>
-#include <net/checksum.h>
-
-#define NAT25_IPV4 01
-#define NAT25_IPV6 02
-#define NAT25_IPX 03
-#define NAT25_APPLE 04
-#define NAT25_PPPOE 05
-
-#define RTL_RELAY_TAG_LEN (ETH_ALEN)
-#define TAG_HDR_LEN 4
-
-#define MAGIC_CODE 0x8186
-#define MAGIC_CODE_LEN 2
-#define WAIT_TIME_PPPOE 5 /* waiting time for pppoe server in sec */
-
-/*-----------------------------------------------------------------
- How database records network address:
- 0 1 2 3 4 5 6 7 8 9 10
- |----|----|----|----|----|----|----|----|----|----|----|
- IPv4 |type| | IP addr |
- IPX |type| Net addr | Node addr |
- IPX |type| Net addr |Sckt addr|
- Apple |type| Network |node|
- PPPoE |type| SID | AC MAC |
------------------------------------------------------------------*/
-
-
-/* Find a tag in pppoe frame and return the pointer */
-static inline unsigned char *__nat25_find_pppoe_tag(struct pppoe_hdr *ph, unsigned short type)
-{
- unsigned char *cur_ptr, *start_ptr;
- unsigned short tagLen, tagType;
-
- start_ptr = cur_ptr = (unsigned char *)ph->tag;
- while ((cur_ptr - start_ptr) < ntohs(ph->length)) {
- /* prevent un-alignment access */
- tagType = (unsigned short)((cur_ptr[0] << 8) + cur_ptr[1]);
- tagLen = (unsigned short)((cur_ptr[2] << 8) + cur_ptr[3]);
- if (tagType == type)
- return cur_ptr;
- cur_ptr = cur_ptr + TAG_HDR_LEN + tagLen;
- }
- return NULL;
-}
-
-
-static inline int __nat25_add_pppoe_tag(struct sk_buff *skb, struct pppoe_tag *tag)
-{
- struct pppoe_hdr *ph = (struct pppoe_hdr *)(skb->data + ETH_HLEN);
- int data_len;
-
- data_len = be16_to_cpu(tag->tag_len) + TAG_HDR_LEN;
- if (skb_tailroom(skb) < data_len) {
- _DEBUG_ERR("skb_tailroom() failed in add SID tag!\n");
- return -1;
- }
-
- skb_put(skb, data_len);
- /* have a room for new tag */
- memmove(((unsigned char *)ph->tag + data_len), (unsigned char *)ph->tag, ntohs(ph->length));
- ph->length = htons(ntohs(ph->length) + data_len);
- memcpy((unsigned char *)ph->tag, tag, data_len);
- return data_len;
-}
-
-static inline unsigned long __nat25_timeout(struct adapter *priv)
-{
- unsigned long timeout;
-
- timeout = jiffies - NAT25_AGEING_TIME*HZ;
-
- return timeout;
-}
-
-
-static inline int __nat25_has_expired(struct adapter *priv,
- struct nat25_network_db_entry *fdb)
-{
- if (time_before_eq(fdb->ageing_timer, __nat25_timeout(priv)))
- return 1;
-
- return 0;
-}
-
-
-static inline void __nat25_generate_ipv4_network_addr(unsigned char *networkAddr,
- unsigned int *ipAddr)
-{
- memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN);
-
- networkAddr[0] = NAT25_IPV4;
- memcpy(networkAddr+7, (unsigned char *)ipAddr, 4);
-}
-
-
-static inline void __nat25_generate_ipx_network_addr_with_node(unsigned char *networkAddr,
- __be32 *ipxNetAddr, unsigned char *ipxNodeAddr)
-{
- memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN);
-
- networkAddr[0] = NAT25_IPX;
- memcpy(networkAddr+1, (unsigned char *)ipxNetAddr, 4);
- memcpy(networkAddr+5, ipxNodeAddr, 6);
-}
-
-
-static inline void __nat25_generate_ipx_network_addr_with_socket(unsigned char *networkAddr,
- __be32 *ipxNetAddr, __be16 *ipxSocketAddr)
-{
- memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN);
-
- networkAddr[0] = NAT25_IPX;
- memcpy(networkAddr+1, (unsigned char *)ipxNetAddr, 4);
- memcpy(networkAddr+5, (unsigned char *)ipxSocketAddr, 2);
-}
-
-
-static inline void __nat25_generate_apple_network_addr(unsigned char *networkAddr,
- __be16 *network, unsigned char *node)
-{
- memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN);
-
- networkAddr[0] = NAT25_APPLE;
- memcpy(networkAddr+1, (unsigned char *)network, 2);
- networkAddr[3] = *node;
-}
-
-static inline void __nat25_generate_pppoe_network_addr(unsigned char *networkAddr,
- unsigned char *ac_mac, __be16 *sid)
-{
- memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN);
-
- networkAddr[0] = NAT25_PPPOE;
- memcpy(networkAddr+1, (unsigned char *)sid, 2);
- memcpy(networkAddr+3, (unsigned char *)ac_mac, 6);
-}
-
-static inline int __nat25_network_hash(unsigned char *networkAddr)
-{
- if (networkAddr[0] == NAT25_IPV4) {
- unsigned long x;
-
- x = networkAddr[7] ^ networkAddr[8] ^ networkAddr[9] ^ networkAddr[10];
-
- return x & (NAT25_HASH_SIZE - 1);
- } else if (networkAddr[0] == NAT25_IPX) {
- unsigned long x;
-
- x = networkAddr[1] ^ networkAddr[2] ^ networkAddr[3] ^ networkAddr[4] ^ networkAddr[5] ^
- networkAddr[6] ^ networkAddr[7] ^ networkAddr[8] ^ networkAddr[9] ^ networkAddr[10];
-
- return x & (NAT25_HASH_SIZE - 1);
- } else if (networkAddr[0] == NAT25_APPLE) {
- unsigned long x;
-
- x = networkAddr[1] ^ networkAddr[2] ^ networkAddr[3];
-
- return x & (NAT25_HASH_SIZE - 1);
- } else if (networkAddr[0] == NAT25_PPPOE) {
- unsigned long x;
-
- x = networkAddr[0] ^ networkAddr[1] ^ networkAddr[2] ^ networkAddr[3] ^ networkAddr[4] ^ networkAddr[5] ^ networkAddr[6] ^ networkAddr[7] ^ networkAddr[8];
-
- return x & (NAT25_HASH_SIZE - 1);
- } else if (networkAddr[0] == NAT25_IPV6) {
- unsigned long x;
-
- x = networkAddr[1] ^ networkAddr[2] ^ networkAddr[3] ^ networkAddr[4] ^ networkAddr[5] ^
- networkAddr[6] ^ networkAddr[7] ^ networkAddr[8] ^ networkAddr[9] ^ networkAddr[10] ^
- networkAddr[11] ^ networkAddr[12] ^ networkAddr[13] ^ networkAddr[14] ^ networkAddr[15] ^
- networkAddr[16];
-
- return x & (NAT25_HASH_SIZE - 1);
- } else {
- unsigned long x = 0;
- int i;
-
- for (i = 0; i < MAX_NETWORK_ADDR_LEN; i++)
- x ^= networkAddr[i];
-
- return x & (NAT25_HASH_SIZE - 1);
- }
-}
-
-static inline void __network_hash_link(struct adapter *priv,
- struct nat25_network_db_entry *ent, int hash)
-{
- /* Caller must spin_lock_bh already! */
- ent->next_hash = priv->nethash[hash];
- if (ent->next_hash != NULL)
- ent->next_hash->pprev_hash = &ent->next_hash;
- priv->nethash[hash] = ent;
- ent->pprev_hash = &priv->nethash[hash];
-}
-
-static inline void __network_hash_unlink(struct nat25_network_db_entry *ent)
-{
- /* Caller must spin_lock_bh already! */
- *(ent->pprev_hash) = ent->next_hash;
- if (ent->next_hash != NULL)
- ent->next_hash->pprev_hash = ent->pprev_hash;
- ent->next_hash = NULL;
- ent->pprev_hash = NULL;
-}
-
-/*
- * NAT2.5 interface
- */
-
-void nat25_db_expire(struct adapter *priv)
-{
- int i;
- spin_lock_bh(&priv->br_ext_lock);
-
- for (i = 0; i < NAT25_HASH_SIZE; i++) {
- struct nat25_network_db_entry *f;
- f = priv->nethash[i];
-
- while (f != NULL) {
- struct nat25_network_db_entry *g;
- g = f->next_hash;
-
- if (__nat25_has_expired(priv, f)) {
- if (atomic_dec_and_test(&f->use_count)) {
- if (priv->scdb_entry == f) {
- memset(priv->scdb_mac, 0, ETH_ALEN);
- memset(priv->scdb_ip, 0, 4);
- priv->scdb_entry = NULL;
- }
- __network_hash_unlink(f);
- kfree(f);
- }
- }
- f = g;
- }
- }
- spin_unlock_bh(&priv->br_ext_lock);
-}
-
-#define SERVER_PORT 67
-#define CLIENT_PORT 68
-#define DHCP_MAGIC 0x63825363
-#define BROADCAST_FLAG 0x8000
-
-struct dhcpMessage {
- u_int8_t op;
- u_int8_t htype;
- u_int8_t hlen;
- u_int8_t hops;
- __be32 xid;
- __be16 secs;
- __be16 flags;
- __be32 ciaddr;
- __be32 yiaddr;
- __be32 siaddr;
- __be32 giaddr;
- u_int8_t chaddr[16];
- u_int8_t sname[64];
- u_int8_t file[128];
- __be32 cookie;
- u_int8_t options[308]; /* 312 - cookie */
-};
-
-void dhcp_flag_bcast(struct adapter *priv, struct sk_buff *skb)
-{
- if (skb == NULL)
- return;
-
- if (!priv->ethBrExtInfo.dhcp_bcst_disable) {
- __be16 protocol = *((__be16 *)(skb->data + 2 * ETH_ALEN));
-
- if (protocol == __constant_htons(ETH_P_IP)) { /* IP */
- struct iphdr *iph = (struct iphdr *)(skb->data + ETH_HLEN);
-
- if (iph->protocol == IPPROTO_UDP) { /* UDP */
- struct udphdr *udph = (struct udphdr *)((size_t)iph + (iph->ihl << 2));
-
- if ((udph->source == __constant_htons(CLIENT_PORT)) &&
- (udph->dest == __constant_htons(SERVER_PORT))) { /* DHCP request */
- struct dhcpMessage *dhcph =
- (struct dhcpMessage *)((size_t)udph + sizeof(struct udphdr));
- u32 cookie = be32_to_cpu((__be32)dhcph->cookie);
-
- if (cookie == DHCP_MAGIC) { /* match magic word */
- if (!(dhcph->flags & htons(BROADCAST_FLAG))) {
- /* if not broadcast */
- register int sum = 0;
-
- DEBUG_INFO("DHCP: change flag of DHCP request to broadcast.\n");
- /* or BROADCAST flag */
- dhcph->flags |= htons(BROADCAST_FLAG);
- /* recalculate checksum */
- sum = ~(udph->check) & 0xffff;
- sum += be16_to_cpu(dhcph->flags);
- while (sum >> 16)
- sum = (sum & 0xffff) + (sum >> 16);
- udph->check = ~sum;
- }
- }
- }
- }
- }
- }
-}
-
-
-void *scdb_findEntry(struct adapter *priv, unsigned char *macAddr,
- unsigned char *ipAddr)
-{
- unsigned char networkAddr[MAX_NETWORK_ADDR_LEN];
- struct nat25_network_db_entry *db;
- int hash;
-
- __nat25_generate_ipv4_network_addr(networkAddr, (unsigned int *)ipAddr);
- hash = __nat25_network_hash(networkAddr);
- db = priv->nethash[hash];
- while (db != NULL) {
- if (!memcmp(db->networkAddr, networkAddr, MAX_NETWORK_ADDR_LEN))
- return (void *)db;
-
- db = db->next_hash;
- }
-
- return NULL;
-}
projects / firefly-linux-kernel-4.4.55.git / commitdiff