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1582 lines
45 KiB
C
1582 lines
45 KiB
C
/******************************************************************************
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*
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* Copyright(c) 2007 - 2017 Realtek Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*****************************************************************************/
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#define _RTW_BR_EXT_C_
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#ifdef __KERNEL__
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#include <linux/if_arp.h>
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#include <net/ip.h>
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#include <net/ipx.h>
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#include <linux/atalk.h>
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#include <linux/udp.h>
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#include <linux/if_pppox.h>
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#endif
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#if 1 /* rtw_wifi_driver */
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#include <drv_types.h>
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#else /* rtw_wifi_driver */
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#include "./8192cd_cfg.h"
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#ifndef __KERNEL__
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#include "./sys-support.h"
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#endif
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#include "./8192cd.h"
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#include "./8192cd_headers.h"
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#include "./8192cd_br_ext.h"
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#include "./8192cd_debug.h"
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#endif /* rtw_wifi_driver */
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#ifdef CL_IPV6_PASS
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#ifdef __KERNEL__
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#include <linux/ipv6.h>
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#include <linux/icmpv6.h>
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#include <net/ndisc.h>
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#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24))
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#include <net/ip6_checksum.h>
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#else
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#include <net/checksum.h>
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#endif
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#endif
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#endif
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#ifdef CONFIG_BR_EXT
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/* #define BR_EXT_DEBUG */
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#define NAT25_IPV4 01
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#define NAT25_IPV6 02
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#define NAT25_IPX 03
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#define NAT25_APPLE 04
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#define NAT25_PPPOE 05
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#define RTL_RELAY_TAG_LEN (ETH_ALEN)
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#define TAG_HDR_LEN 4
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#define MAGIC_CODE 0x8186
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#define MAGIC_CODE_LEN 2
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#define WAIT_TIME_PPPOE 5 /* waiting time for pppoe server in sec */
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/*-----------------------------------------------------------------
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How database records network address:
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0 1 2 3 4 5 6 7 8 9 10
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|----|----|----|----|----|----|----|----|----|----|----|
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IPv4 |type| | IP addr |
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IPX |type| Net addr | Node addr |
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IPX |type| Net addr |Sckt addr|
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Apple |type| Network |node|
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PPPoE |type| SID | AC MAC |
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-----------------------------------------------------------------*/
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/* Find a tag in pppoe frame and return the pointer */
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static __inline__ unsigned char *__nat25_find_pppoe_tag(struct pppoe_hdr *ph, unsigned short type)
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{
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unsigned char *cur_ptr, *start_ptr;
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unsigned short tagLen, tagType;
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start_ptr = cur_ptr = (unsigned char *)ph->tag;
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while ((cur_ptr - start_ptr) < ntohs(ph->length)) {
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/* prevent un-alignment access */
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tagType = (unsigned short)((cur_ptr[0] << 8) + cur_ptr[1]);
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tagLen = (unsigned short)((cur_ptr[2] << 8) + cur_ptr[3]);
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if (tagType == type)
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return cur_ptr;
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cur_ptr = cur_ptr + TAG_HDR_LEN + tagLen;
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}
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return 0;
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}
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static __inline__ int __nat25_add_pppoe_tag(struct sk_buff *skb, struct pppoe_tag *tag)
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{
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struct pppoe_hdr *ph = (struct pppoe_hdr *)(skb->data + ETH_HLEN);
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int data_len;
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data_len = tag->tag_len + TAG_HDR_LEN;
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if (skb_tailroom(skb) < data_len) {
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_DEBUG_ERR("skb_tailroom() failed in add SID tag!\n");
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return -1;
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}
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skb_put(skb, data_len);
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/* have a room for new tag */
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memmove(((unsigned char *)ph->tag + data_len), (unsigned char *)ph->tag, ntohs(ph->length));
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ph->length = htons(ntohs(ph->length) + data_len);
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memcpy((unsigned char *)ph->tag, tag, data_len);
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return data_len;
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}
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static int skb_pull_and_merge(struct sk_buff *skb, unsigned char *src, int len)
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{
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int tail_len;
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unsigned long end, tail;
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if ((src + len) > skb_tail_pointer(skb) || skb->len < len)
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return -1;
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tail = (unsigned long)skb_tail_pointer(skb);
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end = (unsigned long)src + len;
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if (tail < end)
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return -1;
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tail_len = (int)(tail - end);
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if (tail_len > 0)
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memmove(src, src + len, tail_len);
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skb_trim(skb, skb->len - len);
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return 0;
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}
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static __inline__ unsigned long __nat25_timeout(_adapter *priv)
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{
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unsigned long timeout;
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timeout = jiffies - NAT25_AGEING_TIME * HZ;
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return timeout;
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}
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static __inline__ int __nat25_has_expired(_adapter *priv,
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struct nat25_network_db_entry *fdb)
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{
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if (time_before_eq(fdb->ageing_timer, __nat25_timeout(priv)))
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return 1;
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return 0;
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}
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static __inline__ void __nat25_generate_ipv4_network_addr(unsigned char *networkAddr,
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unsigned int *ipAddr)
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{
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memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN);
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networkAddr[0] = NAT25_IPV4;
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memcpy(networkAddr + 7, (unsigned char *)ipAddr, 4);
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}
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static __inline__ void __nat25_generate_ipx_network_addr_with_node(unsigned char *networkAddr,
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unsigned int *ipxNetAddr, unsigned char *ipxNodeAddr)
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{
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memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN);
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networkAddr[0] = NAT25_IPX;
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memcpy(networkAddr + 1, (unsigned char *)ipxNetAddr, 4);
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memcpy(networkAddr + 5, ipxNodeAddr, 6);
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}
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static __inline__ void __nat25_generate_ipx_network_addr_with_socket(unsigned char *networkAddr,
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unsigned int *ipxNetAddr, unsigned short *ipxSocketAddr)
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{
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memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN);
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networkAddr[0] = NAT25_IPX;
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memcpy(networkAddr + 1, (unsigned char *)ipxNetAddr, 4);
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memcpy(networkAddr + 5, (unsigned char *)ipxSocketAddr, 2);
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}
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static __inline__ void __nat25_generate_apple_network_addr(unsigned char *networkAddr,
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unsigned short *network, unsigned char *node)
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{
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memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN);
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networkAddr[0] = NAT25_APPLE;
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memcpy(networkAddr + 1, (unsigned char *)network, 2);
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networkAddr[3] = *node;
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}
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static __inline__ void __nat25_generate_pppoe_network_addr(unsigned char *networkAddr,
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unsigned char *ac_mac, unsigned short *sid)
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{
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memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN);
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networkAddr[0] = NAT25_PPPOE;
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memcpy(networkAddr + 1, (unsigned char *)sid, 2);
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memcpy(networkAddr + 3, (unsigned char *)ac_mac, 6);
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}
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#ifdef CL_IPV6_PASS
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static void __nat25_generate_ipv6_network_addr(unsigned char *networkAddr,
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unsigned int *ipAddr)
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{
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memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN);
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networkAddr[0] = NAT25_IPV6;
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memcpy(networkAddr + 1, (unsigned char *)ipAddr, 16);
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}
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static unsigned char *scan_tlv(unsigned char *data, int len, unsigned char tag, unsigned char len8b)
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{
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while (len > 0) {
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if (*data == tag && *(data + 1) == len8b && len >= len8b * 8)
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return data + 2;
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len -= (*(data + 1)) * 8;
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data += (*(data + 1)) * 8;
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}
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return NULL;
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}
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static int update_nd_link_layer_addr(unsigned char *data, int len, unsigned char *replace_mac)
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{
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struct icmp6hdr *icmphdr = (struct icmp6hdr *)data;
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unsigned char *mac;
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if (icmphdr->icmp6_type == NDISC_ROUTER_SOLICITATION) {
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if (len >= 8) {
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mac = scan_tlv(&data[8], len - 8, 1, 1);
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if (mac) {
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RTW_INFO("Router Solicitation, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n",
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mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
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replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]);
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memcpy(mac, replace_mac, 6);
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return 1;
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}
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}
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} else if (icmphdr->icmp6_type == NDISC_ROUTER_ADVERTISEMENT) {
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if (len >= 16) {
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mac = scan_tlv(&data[16], len - 16, 1, 1);
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if (mac) {
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RTW_INFO("Router Advertisement, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n",
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mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
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replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]);
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memcpy(mac, replace_mac, 6);
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return 1;
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}
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}
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} else if (icmphdr->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) {
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if (len >= 24) {
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mac = scan_tlv(&data[24], len - 24, 1, 1);
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if (mac) {
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RTW_INFO("Neighbor Solicitation, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n",
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mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
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replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]);
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memcpy(mac, replace_mac, 6);
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return 1;
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}
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}
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} else if (icmphdr->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
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if (len >= 24) {
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mac = scan_tlv(&data[24], len - 24, 2, 1);
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if (mac) {
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RTW_INFO("Neighbor Advertisement, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n",
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mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
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replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]);
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memcpy(mac, replace_mac, 6);
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return 1;
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}
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}
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} else if (icmphdr->icmp6_type == NDISC_REDIRECT) {
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if (len >= 40) {
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mac = scan_tlv(&data[40], len - 40, 2, 1);
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if (mac) {
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RTW_INFO("Redirect, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n",
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mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
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replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]);
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memcpy(mac, replace_mac, 6);
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return 1;
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}
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}
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}
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return 0;
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}
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#ifdef SUPPORT_RX_UNI2MCAST
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static void convert_ipv6_mac_to_mc(struct sk_buff *skb)
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{
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struct ipv6hdr *iph = (struct ipv6hdr *)(skb->data + ETH_HLEN);
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unsigned char *dst_mac = skb->data;
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/* dst_mac[0] = 0xff; */
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/* dst_mac[1] = 0xff; */
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/*modified by qinjunjie,ipv6 multicast address ix 0x33-33-xx-xx-xx-xx*/
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dst_mac[0] = 0x33;
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dst_mac[1] = 0x33;
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memcpy(&dst_mac[2], &iph->daddr.s6_addr32[3], 4);
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#if defined(__LINUX_2_6__)
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/*modified by qinjunjie,warning:should not remove next line*/
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skb->pkt_type = PACKET_MULTICAST;
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#endif
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}
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#endif /* CL_IPV6_PASS */
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#endif /* SUPPORT_RX_UNI2MCAST */
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static __inline__ int __nat25_network_hash(unsigned char *networkAddr)
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{
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if (networkAddr[0] == NAT25_IPV4) {
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unsigned long x;
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x = networkAddr[7] ^ networkAddr[8] ^ networkAddr[9] ^ networkAddr[10];
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return x & (NAT25_HASH_SIZE - 1);
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} else if (networkAddr[0] == NAT25_IPX) {
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unsigned long x;
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x = networkAddr[1] ^ networkAddr[2] ^ networkAddr[3] ^ networkAddr[4] ^ networkAddr[5] ^
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networkAddr[6] ^ networkAddr[7] ^ networkAddr[8] ^ networkAddr[9] ^ networkAddr[10];
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return x & (NAT25_HASH_SIZE - 1);
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} else if (networkAddr[0] == NAT25_APPLE) {
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unsigned long x;
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x = networkAddr[1] ^ networkAddr[2] ^ networkAddr[3];
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return x & (NAT25_HASH_SIZE - 1);
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} else if (networkAddr[0] == NAT25_PPPOE) {
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unsigned long x;
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x = networkAddr[0] ^ networkAddr[1] ^ networkAddr[2] ^ networkAddr[3] ^ networkAddr[4] ^ networkAddr[5] ^ networkAddr[6] ^ networkAddr[7] ^ networkAddr[8];
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return x & (NAT25_HASH_SIZE - 1);
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}
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#ifdef CL_IPV6_PASS
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else if (networkAddr[0] == NAT25_IPV6) {
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unsigned long x;
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x = networkAddr[1] ^ networkAddr[2] ^ networkAddr[3] ^ networkAddr[4] ^ networkAddr[5] ^
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networkAddr[6] ^ networkAddr[7] ^ networkAddr[8] ^ networkAddr[9] ^ networkAddr[10] ^
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networkAddr[11] ^ networkAddr[12] ^ networkAddr[13] ^ networkAddr[14] ^ networkAddr[15] ^
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networkAddr[16];
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return x & (NAT25_HASH_SIZE - 1);
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}
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#endif
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else {
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unsigned long x = 0;
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int i;
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for (i = 0; i < MAX_NETWORK_ADDR_LEN; i++)
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x ^= networkAddr[i];
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return x & (NAT25_HASH_SIZE - 1);
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}
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}
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static __inline__ void __network_hash_link(_adapter *priv,
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struct nat25_network_db_entry *ent, int hash)
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{
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/* Caller must _enter_critical_bh already! */
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/* _irqL irqL; */
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/* _enter_critical_bh(&priv->br_ext_lock, &irqL); */
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ent->next_hash = priv->nethash[hash];
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if (ent->next_hash != NULL)
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ent->next_hash->pprev_hash = &ent->next_hash;
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priv->nethash[hash] = ent;
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ent->pprev_hash = &priv->nethash[hash];
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/* _exit_critical_bh(&priv->br_ext_lock, &irqL); */
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}
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static __inline__ void __network_hash_unlink(struct nat25_network_db_entry *ent)
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{
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/* Caller must _enter_critical_bh already! */
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/* _irqL irqL; */
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/* _enter_critical_bh(&priv->br_ext_lock, &irqL); */
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*(ent->pprev_hash) = ent->next_hash;
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if (ent->next_hash != NULL)
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ent->next_hash->pprev_hash = ent->pprev_hash;
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ent->next_hash = NULL;
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ent->pprev_hash = NULL;
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/* _exit_critical_bh(&priv->br_ext_lock, &irqL); */
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}
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static int __nat25_db_network_lookup_and_replace(_adapter *priv,
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struct sk_buff *skb, unsigned char *networkAddr)
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{
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struct nat25_network_db_entry *db;
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_irqL irqL;
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_enter_critical_bh(&priv->br_ext_lock, &irqL);
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db = priv->nethash[__nat25_network_hash(networkAddr)];
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while (db != NULL) {
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if (!memcmp(db->networkAddr, networkAddr, MAX_NETWORK_ADDR_LEN)) {
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if (!__nat25_has_expired(priv, db)) {
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/* replace the destination mac address */
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memcpy(skb->data, db->macAddr, ETH_ALEN);
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atomic_inc(&db->use_count);
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|
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#ifdef CL_IPV6_PASS
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|
RTW_INFO("NAT25: Lookup M:%02x%02x%02x%02x%02x%02x N:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
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"%02x%02x%02x%02x%02x%02x\n",
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db->macAddr[0],
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db->macAddr[1],
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db->macAddr[2],
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db->macAddr[3],
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db->macAddr[4],
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db->macAddr[5],
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db->networkAddr[0],
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db->networkAddr[1],
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db->networkAddr[2],
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db->networkAddr[3],
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db->networkAddr[4],
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db->networkAddr[5],
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db->networkAddr[6],
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db->networkAddr[7],
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db->networkAddr[8],
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db->networkAddr[9],
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db->networkAddr[10],
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db->networkAddr[11],
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db->networkAddr[12],
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db->networkAddr[13],
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db->networkAddr[14],
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db->networkAddr[15],
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db->networkAddr[16]);
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#else
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RTW_INFO("NAT25: Lookup M:%02x%02x%02x%02x%02x%02x N:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
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db->macAddr[0],
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db->macAddr[1],
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db->macAddr[2],
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db->macAddr[3],
|
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db->macAddr[4],
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db->macAddr[5],
|
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db->networkAddr[0],
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db->networkAddr[1],
|
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db->networkAddr[2],
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db->networkAddr[3],
|
|
db->networkAddr[4],
|
|
db->networkAddr[5],
|
|
db->networkAddr[6],
|
|
db->networkAddr[7],
|
|
db->networkAddr[8],
|
|
db->networkAddr[9],
|
|
db->networkAddr[10]);
|
|
#endif
|
|
}
|
|
_exit_critical_bh(&priv->br_ext_lock, &irqL);
|
|
return 1;
|
|
}
|
|
|
|
db = db->next_hash;
|
|
}
|
|
|
|
_exit_critical_bh(&priv->br_ext_lock, &irqL);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void __nat25_db_network_insert(_adapter *priv,
|
|
unsigned char *macAddr, unsigned char *networkAddr)
|
|
{
|
|
struct nat25_network_db_entry *db;
|
|
int hash;
|
|
_irqL irqL;
|
|
_enter_critical_bh(&priv->br_ext_lock, &irqL);
|
|
|
|
hash = __nat25_network_hash(networkAddr);
|
|
db = priv->nethash[hash];
|
|
while (db != NULL) {
|
|
if (!memcmp(db->networkAddr, networkAddr, MAX_NETWORK_ADDR_LEN)) {
|
|
memcpy(db->macAddr, macAddr, ETH_ALEN);
|
|
db->ageing_timer = jiffies;
|
|
_exit_critical_bh(&priv->br_ext_lock, &irqL);
|
|
return;
|
|
}
|
|
|
|
db = db->next_hash;
|
|
}
|
|
|
|
db = (struct nat25_network_db_entry *) rtw_malloc(sizeof(*db));
|
|
if (db == NULL) {
|
|
_exit_critical_bh(&priv->br_ext_lock, &irqL);
|
|
return;
|
|
}
|
|
|
|
memcpy(db->networkAddr, networkAddr, MAX_NETWORK_ADDR_LEN);
|
|
memcpy(db->macAddr, macAddr, ETH_ALEN);
|
|
atomic_set(&db->use_count, 1);
|
|
db->ageing_timer = jiffies;
|
|
|
|
__network_hash_link(priv, db, hash);
|
|
|
|
_exit_critical_bh(&priv->br_ext_lock, &irqL);
|
|
}
|
|
|
|
|
|
static void __nat25_db_print(_adapter *priv)
|
|
{
|
|
_irqL irqL;
|
|
_enter_critical_bh(&priv->br_ext_lock, &irqL);
|
|
|
|
#ifdef BR_EXT_DEBUG
|
|
static int counter = 0;
|
|
int i, j;
|
|
struct nat25_network_db_entry *db;
|
|
|
|
counter++;
|
|
if ((counter % 16) != 0)
|
|
return;
|
|
|
|
for (i = 0, j = 0; i < NAT25_HASH_SIZE; i++) {
|
|
db = priv->nethash[i];
|
|
|
|
while (db != NULL) {
|
|
#ifdef CL_IPV6_PASS
|
|
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"
|
|
"%02x%02x%02x%02x%02x%02x\n",
|
|
j,
|
|
i,
|
|
atomic_read(&db->use_count),
|
|
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]);
|
|
#else
|
|
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",
|
|
j,
|
|
i,
|
|
atomic_read(&db->use_count),
|
|
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]);
|
|
#endif
|
|
j++;
|
|
|
|
db = db->next_hash;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
_exit_critical_bh(&priv->br_ext_lock, &irqL);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
* NAT2.5 interface
|
|
*/
|
|
|
|
void nat25_db_cleanup(_adapter *priv)
|
|
{
|
|
int i;
|
|
_irqL irqL;
|
|
_enter_critical_bh(&priv->br_ext_lock, &irqL);
|
|
|
|
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 (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);
|
|
rtw_mfree((u8 *) f, sizeof(struct nat25_network_db_entry));
|
|
|
|
f = g;
|
|
}
|
|
}
|
|
|
|
_exit_critical_bh(&priv->br_ext_lock, &irqL);
|
|
}
|
|
|
|
|
|
void nat25_db_expire(_adapter *priv)
|
|
{
|
|
int i;
|
|
_irqL irqL;
|
|
_enter_critical_bh(&priv->br_ext_lock, &irqL);
|
|
|
|
/* if(!priv->ethBrExtInfo.nat25_disable) */
|
|
{
|
|
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)) {
|
|
#ifdef BR_EXT_DEBUG
|
|
#ifdef CL_IPV6_PASS
|
|
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"
|
|
"%02x%02x%02x%02x%02x%02x\n",
|
|
i,
|
|
f->macAddr[0],
|
|
f->macAddr[1],
|
|
f->macAddr[2],
|
|
f->macAddr[3],
|
|
f->macAddr[4],
|
|
f->macAddr[5],
|
|
f->networkAddr[0],
|
|
f->networkAddr[1],
|
|
f->networkAddr[2],
|
|
f->networkAddr[3],
|
|
f->networkAddr[4],
|
|
f->networkAddr[5],
|
|
f->networkAddr[6],
|
|
f->networkAddr[7],
|
|
f->networkAddr[8],
|
|
f->networkAddr[9],
|
|
f->networkAddr[10],
|
|
f->networkAddr[11],
|
|
f->networkAddr[12],
|
|
f->networkAddr[13],
|
|
f->networkAddr[14],
|
|
f->networkAddr[15],
|
|
f->networkAddr[16]);
|
|
#else
|
|
|
|
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",
|
|
i,
|
|
f->macAddr[0],
|
|
f->macAddr[1],
|
|
f->macAddr[2],
|
|
f->macAddr[3],
|
|
f->macAddr[4],
|
|
f->macAddr[5],
|
|
f->networkAddr[0],
|
|
f->networkAddr[1],
|
|
f->networkAddr[2],
|
|
f->networkAddr[3],
|
|
f->networkAddr[4],
|
|
f->networkAddr[5],
|
|
f->networkAddr[6],
|
|
f->networkAddr[7],
|
|
f->networkAddr[8],
|
|
f->networkAddr[9],
|
|
f->networkAddr[10]);
|
|
#endif
|
|
#endif
|
|
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);
|
|
rtw_mfree((u8 *) f, sizeof(struct nat25_network_db_entry));
|
|
}
|
|
}
|
|
|
|
f = g;
|
|
}
|
|
}
|
|
}
|
|
|
|
_exit_critical_bh(&priv->br_ext_lock, &irqL);
|
|
}
|
|
|
|
|
|
#ifdef SUPPORT_TX_MCAST2UNI
|
|
static int checkIPMcAndReplace(_adapter *priv, struct sk_buff *skb, unsigned int *dst_ip)
|
|
{
|
|
struct stat_info *pstat;
|
|
struct list_head *phead, *plist;
|
|
int i;
|
|
|
|
phead = &priv->asoc_list;
|
|
plist = phead->next;
|
|
|
|
while (plist != phead) {
|
|
pstat = list_entry(plist, struct stat_info, asoc_list);
|
|
plist = plist->next;
|
|
|
|
if (pstat->ipmc_num == 0)
|
|
continue;
|
|
|
|
for (i = 0; i < MAX_IP_MC_ENTRY; i++) {
|
|
if (pstat->ipmc[i].used && !memcmp(&pstat->ipmc[i].mcmac[3], ((unsigned char *)dst_ip) + 1, 3)) {
|
|
memcpy(skb->data, pstat->ipmc[i].mcmac, ETH_ALEN);
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
int nat25_db_handle(_adapter *priv, struct sk_buff *skb, int method)
|
|
{
|
|
unsigned short protocol;
|
|
unsigned char networkAddr[MAX_NETWORK_ADDR_LEN];
|
|
|
|
if (skb == NULL)
|
|
return -1;
|
|
|
|
if ((method <= NAT25_MIN) || (method >= NAT25_MAX))
|
|
return -1;
|
|
|
|
protocol = *((unsigned short *)(skb->data + 2 * ETH_ALEN));
|
|
|
|
/*---------------------------------------------------*/
|
|
/* Handle IP frame */
|
|
/*---------------------------------------------------*/
|
|
if (protocol == __constant_htons(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 muticast 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;
|
|
RTW_INFO("NAT25: Insert IP, SA=%08x, DA=%08x\n", iph->saddr, iph->daddr);
|
|
__nat25_generate_ipv4_network_addr(networkAddr, &iph->saddr);
|
|
/* record source IP address and , source mac address into db */
|
|
__nat25_db_network_insert(priv, skb->data + ETH_ALEN, networkAddr);
|
|
|
|
__nat25_db_print(priv);
|
|
}
|
|
return 0;
|
|
|
|
case NAT25_LOOKUP: {
|
|
RTW_INFO("NAT25: Lookup IP, SA=%08x, DA=%08x\n", iph->saddr, iph->daddr);
|
|
#ifdef SUPPORT_TX_MCAST2UNI
|
|
if (priv->pshare->rf_ft_var.mc2u_disable ||
|
|
((((OPMODE & (WIFI_STATION_STATE | WIFI_ASOC_STATE))
|
|
== (WIFI_STATION_STATE | WIFI_ASOC_STATE)) &&
|
|
!checkIPMcAndReplace(priv, skb, &iph->daddr)) ||
|
|
(OPMODE & WIFI_ADHOC_STATE)))
|
|
#endif
|
|
{
|
|
__nat25_generate_ipv4_network_addr(networkAddr, &iph->daddr);
|
|
|
|
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 */
|
|
RTW_INFO("NAT25: Set DA as boardcast\n");
|
|
memset(skb->data, 0xff, ETH_ALEN);
|
|
} else {
|
|
/* forward unknow IP packet to upper TCP/IP */
|
|
RTW_INFO("NAT25: Replace DA with BR's MAC\n");
|
|
if ((*(u32 *)priv->br_mac) == 0 && (*(u16 *)(priv->br_mac + 4)) == 0) {
|
|
void netdev_br_init(struct net_device *netdev);
|
|
printk("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;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------*/
|
|
/* Handle ARP frame */
|
|
/*---------------------------------------------------*/
|
|
else if (protocol == __constant_htons(ETH_P_ARP)) {
|
|
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", htons(arp->ar_pro));
|
|
return -1;
|
|
}
|
|
|
|
switch (method) {
|
|
case NAT25_CHECK:
|
|
return 0; /* skb_copy for all ARP frame */
|
|
|
|
case NAT25_INSERT: {
|
|
RTW_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);
|
|
|
|
__nat25_db_print(priv);
|
|
}
|
|
return 0;
|
|
|
|
case NAT25_LOOKUP: {
|
|
RTW_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;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------*/
|
|
/* Handle IPX and Apple Talk frame */
|
|
/*---------------------------------------------------*/
|
|
else if ((protocol == __constant_htons(ETH_P_IPX)) ||
|
|
(protocol == __constant_htons(ETH_P_ATALK)) ||
|
|
(protocol == __constant_htons(ETH_P_AARP))) {
|
|
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 == __constant_htons(ETH_P_IPX)) {
|
|
RTW_INFO("NAT25: Protocol=IPX (Ethernet II)\n");
|
|
ipx = (struct ipxhdr *)framePtr;
|
|
} else { /* if(protocol <= __constant_htons(ETH_FRAME_LEN)) */
|
|
if (!memcmp(ipx_header, framePtr, 2)) {
|
|
RTW_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 */
|
|
|
|
RTW_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)) {
|
|
RTW_INFO("NAT25: Protocol=IPX (Ethernet 802.2)\n");
|
|
ipx = (struct ipxhdr *)framePtr;
|
|
} else
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* IPX */
|
|
if (ipx != NULL) {
|
|
switch (method) {
|
|
case NAT25_CHECK:
|
|
if (!memcmp(skb->data + ETH_ALEN, ipx->ipx_source.node, ETH_ALEN)) {
|
|
RTW_INFO("NAT25: Check IPX skb_copy\n");
|
|
return 0;
|
|
}
|
|
return -1;
|
|
|
|
case NAT25_INSERT: {
|
|
RTW_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)) {
|
|
RTW_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);
|
|
|
|
__nat25_db_print(priv);
|
|
}
|
|
return 0;
|
|
|
|
case NAT25_LOOKUP: {
|
|
if (!memcmp(GET_MY_HWADDR(priv), ipx->ipx_dest.node, ETH_ALEN)) {
|
|
RTW_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;
|
|
}
|
|
}
|
|
|
|
/* AARP */
|
|
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);
|
|
|
|
RTW_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);
|
|
|
|
__nat25_db_print(priv);
|
|
}
|
|
return 0;
|
|
|
|
case NAT25_LOOKUP: {
|
|
RTW_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;
|
|
}
|
|
}
|
|
|
|
/* DDP */
|
|
else if (ddp != NULL) {
|
|
switch (method) {
|
|
case NAT25_CHECK:
|
|
return -1;
|
|
|
|
case NAT25_INSERT: {
|
|
RTW_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);
|
|
|
|
__nat25_db_print(priv);
|
|
}
|
|
return 0;
|
|
|
|
case NAT25_LOOKUP: {
|
|
RTW_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;
|
|
}
|
|
|
|
/*---------------------------------------------------*/
|
|
/* Handle PPPoE frame */
|
|
/*---------------------------------------------------*/
|
|
else if ((protocol == __constant_htons(ETH_P_PPP_DISC)) ||
|
|
(protocol == __constant_htons(ETH_P_PPP_SES))) {
|
|
struct pppoe_hdr *ph = (struct pppoe_hdr *)(skb->data + ETH_HLEN);
|
|
unsigned short *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 = (unsigned short *)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;
|
|
|
|
RTW_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 */
|
|
RTW_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);
|
|
|
|
__nat25_db_print(priv);
|
|
|
|
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 == 0) {
|
|
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 = (unsigned short *)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);
|
|
|
|
RTW_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 progresss!\n");
|
|
return -1;
|
|
}
|
|
memcpy(skb->data, priv->pppoe_addr, ETH_ALEN);
|
|
priv->pppoe_connection_in_progress = WAIT_TIME_PPPOE;
|
|
}
|
|
} else {
|
|
if (ph->sid != 0) {
|
|
RTW_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);
|
|
|
|
__nat25_db_print(priv);
|
|
} else
|
|
return -1;
|
|
|
|
}
|
|
return 0;
|
|
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------*/
|
|
/* Handle EAP frame */
|
|
/*---------------------------------------------------*/
|
|
else if (protocol == __constant_htons(0x888e)) {
|
|
switch (method) {
|
|
case NAT25_CHECK:
|
|
return -1;
|
|
|
|
case NAT25_INSERT:
|
|
return 0;
|
|
|
|
case NAT25_LOOKUP:
|
|
return 0;
|
|
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------*/
|
|
/* Handle C-Media proprietary frame */
|
|
/*---------------------------------------------------*/
|
|
else if ((protocol == __constant_htons(0xe2ae)) ||
|
|
(protocol == __constant_htons(0xe2af))) {
|
|
switch (method) {
|
|
case NAT25_CHECK:
|
|
return -1;
|
|
|
|
case NAT25_INSERT:
|
|
return 0;
|
|
|
|
case NAT25_LOOKUP:
|
|
return 0;
|
|
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------*/
|
|
/* Handle IPV6 frame */
|
|
/*---------------------------------------------------*/
|
|
#ifdef CL_IPV6_PASS
|
|
else if (protocol == __constant_htons(ETH_P_IPV6)) {
|
|
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: {
|
|
RTW_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, (unsigned int *)&iph->saddr);
|
|
__nat25_db_network_insert(priv, skb->data + ETH_ALEN, networkAddr);
|
|
__nat25_db_print(priv);
|
|
|
|
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,
|
|
iph->payload_len,
|
|
IPPROTO_ICMPV6,
|
|
csum_partial((__u8 *)hdr, iph->payload_len, 0));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
|
|
case NAT25_LOOKUP:
|
|
RTW_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, (unsigned int *)&iph->daddr);
|
|
if (!__nat25_db_network_lookup_and_replace(priv, skb, networkAddr)) {
|
|
#ifdef SUPPORT_RX_UNI2MCAST
|
|
if (iph->daddr.s6_addr[0] == 0xff)
|
|
convert_ipv6_mac_to_mc(skb);
|
|
#endif
|
|
}
|
|
return 0;
|
|
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
#endif /* CL_IPV6_PASS */
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
int nat25_handle_frame(_adapter *priv, struct sk_buff *skb)
|
|
{
|
|
#ifdef BR_EXT_DEBUG
|
|
if ((!priv->ethBrExtInfo.nat25_disable) && (!(skb->data[0] & 1))) {
|
|
panic_printk("NAT25: Input Frame: DA=%02x%02x%02x%02x%02x%02x SA=%02x%02x%02x%02x%02x%02x\n",
|
|
skb->data[0],
|
|
skb->data[1],
|
|
skb->data[2],
|
|
skb->data[3],
|
|
skb->data[4],
|
|
skb->data[5],
|
|
skb->data[6],
|
|
skb->data[7],
|
|
skb->data[8],
|
|
skb->data[9],
|
|
skb->data[10],
|
|
skb->data[11]);
|
|
}
|
|
#endif
|
|
|
|
if (!(skb->data[0] & 1)) {
|
|
int is_vlan_tag = 0, i, retval = 0;
|
|
unsigned short vlan_hdr = 0;
|
|
|
|
if (*((unsigned short *)(skb->data + ETH_ALEN * 2)) == __constant_htons(ETH_P_8021Q)) {
|
|
is_vlan_tag = 1;
|
|
vlan_hdr = *((unsigned short *)(skb->data + ETH_ALEN * 2 + 2));
|
|
for (i = 0; i < 6; i++)
|
|
*((unsigned short *)(skb->data + ETH_ALEN * 2 + 2 - i * 2)) = *((unsigned short *)(skb->data + ETH_ALEN * 2 - 2 - i * 2));
|
|
skb_pull(skb, 4);
|
|
}
|
|
|
|
if (!priv->ethBrExtInfo.nat25_disable) {
|
|
_irqL irqL;
|
|
_enter_critical_bh(&priv->br_ext_lock, &irqL);
|
|
/*
|
|
* This function look up the destination network address from
|
|
* the NAT2.5 database. Return value = -1 means that the
|
|
* corresponding network protocol is NOT support.
|
|
*/
|
|
if (!priv->ethBrExtInfo.nat25sc_disable &&
|
|
(*((unsigned short *)(skb->data + ETH_ALEN * 2)) == __constant_htons(ETH_P_IP)) &&
|
|
!memcmp(priv->scdb_ip, skb->data + ETH_HLEN + 16, 4)) {
|
|
memcpy(skb->data, priv->scdb_mac, ETH_ALEN);
|
|
|
|
_exit_critical_bh(&priv->br_ext_lock, &irqL);
|
|
} else {
|
|
_exit_critical_bh(&priv->br_ext_lock, &irqL);
|
|
|
|
retval = nat25_db_handle(priv, skb, NAT25_LOOKUP);
|
|
}
|
|
} else {
|
|
if (((*((unsigned short *)(skb->data + ETH_ALEN * 2)) == __constant_htons(ETH_P_IP)) &&
|
|
!memcmp(priv->br_ip, skb->data + ETH_HLEN + 16, 4)) ||
|
|
((*((unsigned short *)(skb->data + ETH_ALEN * 2)) == __constant_htons(ETH_P_ARP)) &&
|
|
!memcmp(priv->br_ip, skb->data + ETH_HLEN + 24, 4))) {
|
|
/* for traffic to upper TCP/IP */
|
|
retval = nat25_db_handle(priv, skb, NAT25_LOOKUP);
|
|
}
|
|
}
|
|
|
|
if (is_vlan_tag) {
|
|
skb_push(skb, 4);
|
|
for (i = 0; i < 6; i++)
|
|
*((unsigned short *)(skb->data + i * 2)) = *((unsigned short *)(skb->data + 4 + i * 2));
|
|
*((unsigned short *)(skb->data + ETH_ALEN * 2)) = __constant_htons(ETH_P_8021Q);
|
|
*((unsigned short *)(skb->data + ETH_ALEN * 2 + 2)) = vlan_hdr;
|
|
}
|
|
|
|
if (retval == -1) {
|
|
/* DEBUG_ERR("NAT25: Lookup fail!\n"); */
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if 0
|
|
void mac_clone(_adapter *priv, unsigned char *addr)
|
|
{
|
|
struct sockaddr sa;
|
|
|
|
memcpy(sa.sa_data, addr, ETH_ALEN);
|
|
RTW_INFO("MAC Clone: Addr=%02x%02x%02x%02x%02x%02x\n",
|
|
addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
|
|
rtl8192cd_set_hwaddr(priv->dev, &sa);
|
|
}
|
|
|
|
|
|
int mac_clone_handle_frame(_adapter *priv, struct sk_buff *skb)
|
|
{
|
|
if (priv->ethBrExtInfo.macclone_enable && !priv->macclone_completed) {
|
|
if (!(skb->data[ETH_ALEN] & 1)) { /* check any other particular MAC add */
|
|
if (memcmp(skb->data + ETH_ALEN, GET_MY_HWADDR(priv), ETH_ALEN) &&
|
|
((priv->dev->br_port) &&
|
|
memcmp(skb->data + ETH_ALEN, priv->br_mac, ETH_ALEN))) {
|
|
mac_clone(priv, skb->data + ETH_ALEN);
|
|
priv->macclone_completed = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif /* 0 */
|
|
|
|
#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;
|
|
u_int32_t xid;
|
|
u_int16_t secs;
|
|
u_int16_t flags;
|
|
u_int32_t ciaddr;
|
|
u_int32_t yiaddr;
|
|
u_int32_t siaddr;
|
|
u_int32_t giaddr;
|
|
u_int8_t chaddr[16];
|
|
u_int8_t sname[64];
|
|
u_int8_t file[128];
|
|
u_int32_t cookie;
|
|
u_int8_t options[308]; /* 312 - cookie */
|
|
};
|
|
|
|
void dhcp_flag_bcast(_adapter *priv, struct sk_buff *skb)
|
|
{
|
|
if (skb == NULL)
|
|
return;
|
|
|
|
if (!priv->ethBrExtInfo.dhcp_bcst_disable) {
|
|
unsigned short protocol = *((unsigned short *)(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_PTR)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_PTR)udph + sizeof(struct udphdr));
|
|
|
|
if (dhcph->cookie == __constant_htonl(DHCP_MAGIC)) { /* match magic word */
|
|
if (!(dhcph->flags & htons(BROADCAST_FLAG))) { /* if not broadcast */
|
|
register int sum = 0;
|
|
|
|
RTW_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 += dhcph->flags;
|
|
while (sum >> 16)
|
|
sum = (sum & 0xffff) + (sum >> 16);
|
|
udph->check = ~sum;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void *scdb_findEntry(_adapter *priv, unsigned char *macAddr,
|
|
unsigned char *ipAddr)
|
|
{
|
|
unsigned char networkAddr[MAX_NETWORK_ADDR_LEN];
|
|
struct nat25_network_db_entry *db;
|
|
int hash;
|
|
/* _irqL irqL; */
|
|
/* _enter_critical_bh(&priv->br_ext_lock, &irqL); */
|
|
|
|
__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)) {
|
|
/* _exit_critical_bh(&priv->br_ext_lock, &irqL); */
|
|
return (void *)db;
|
|
}
|
|
|
|
db = db->next_hash;
|
|
}
|
|
|
|
/* _exit_critical_bh(&priv->br_ext_lock, &irqL); */
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* CONFIG_BR_EXT */
|