diff --git a/core/rtw_br_ext.c b/core/rtw_br_ext.c index 8e186c7..0c8b05d 100644 --- a/core/rtw_br_ext.c +++ b/core/rtw_br_ext.c @@ -80,7 +80,7 @@ /* 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) +static unsigned char *__nat25_find_pppoe_tag(struct pppoe_hdr *ph, unsigned short type) { unsigned char *cur_ptr, *start_ptr; unsigned short tagLen, tagType; @@ -98,7 +98,7 @@ static __inline__ unsigned char *__nat25_find_pppoe_tag(struct pppoe_hdr *ph, un } -static __inline__ int __nat25_add_pppoe_tag(struct sk_buff *skb, struct pppoe_tag *tag) +static 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; @@ -138,7 +138,7 @@ static int skb_pull_and_merge(struct sk_buff *skb, unsigned char *src, int len) return 0; } -static __inline__ unsigned long __nat25_timeout(_adapter *priv) +static unsigned long __nat25_timeout(_adapter *priv) { unsigned long timeout; @@ -148,7 +148,7 @@ static __inline__ unsigned long __nat25_timeout(_adapter *priv) } -static __inline__ int __nat25_has_expired(_adapter *priv, +static int __nat25_has_expired(_adapter *priv, struct nat25_network_db_entry *fdb) { if (time_before_eq(fdb->ageing_timer, __nat25_timeout(priv))) @@ -158,7 +158,7 @@ static __inline__ int __nat25_has_expired(_adapter *priv, } -static __inline__ void __nat25_generate_ipv4_network_addr(unsigned char *networkAddr, +static void __nat25_generate_ipv4_network_addr(unsigned char *networkAddr, unsigned int *ipAddr) { memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN); @@ -167,7 +167,7 @@ static __inline__ void __nat25_generate_ipv4_network_addr(unsigned char *network memcpy(networkAddr + 7, (unsigned char *)ipAddr, 4); } -static __inline__ void __nat25_generate_pppoe_network_addr(unsigned char *networkAddr, +static void __nat25_generate_pppoe_network_addr(unsigned char *networkAddr, unsigned char *ac_mac, unsigned short *sid) { memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN); @@ -287,7 +287,7 @@ static void convert_ipv6_mac_to_mc(struct sk_buff *skb) #endif /* SUPPORT_RX_UNI2MCAST */ -static __inline__ int __nat25_network_hash(unsigned char *networkAddr) +static int __nat25_network_hash(unsigned char *networkAddr) { if (networkAddr[0] == NAT25_IPV4) { unsigned long x; @@ -339,7 +339,7 @@ static __inline__ int __nat25_network_hash(unsigned char *networkAddr) } -static __inline__ void __network_hash_link(_adapter *priv, +static void __network_hash_link(_adapter *priv, struct nat25_network_db_entry *ent, int hash) { /* Caller must _enter_critical_bh already! */ @@ -356,7 +356,7 @@ static __inline__ void __network_hash_link(_adapter *priv, } -static __inline__ void __network_hash_unlink(struct nat25_network_db_entry *ent) +static void __network_hash_unlink(struct nat25_network_db_entry *ent) { /* Caller must _enter_critical_bh already! */ /* _irqL irqL; */ diff --git a/core/rtw_br_ext.c.orig b/core/rtw_br_ext.c.orig new file mode 100644 index 0000000..8e186c7 --- /dev/null +++ b/core/rtw_br_ext.c.orig @@ -0,0 +1,1325 @@ +/****************************************************************************** + * + * Copyright(c) 2007 - 2017 Realtek Corporation. + * + * 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. + * + *****************************************************************************/ +#define _RTW_BR_EXT_C_ + +#ifdef __KERNEL__ + #include + #include + #include + #include + #include +#endif + +#if 1 /* rtw_wifi_driver */ + #include +#else /* rtw_wifi_driver */ + #include "./8192cd_cfg.h" + + #ifndef __KERNEL__ + #include "./sys-support.h" + #endif + + #include "./8192cd.h" + #include "./8192cd_headers.h" + #include "./8192cd_br_ext.h" + #include "./8192cd_debug.h" +#endif /* rtw_wifi_driver */ + +#ifdef CL_IPV6_PASS + #ifdef __KERNEL__ + #include + #include + #include + #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)) + #include + #else + #include + #endif + #endif +#endif + +#ifdef CONFIG_BR_EXT + +/* #define BR_EXT_DEBUG */ + +#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 0; +} + + +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 = 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 int skb_pull_and_merge(struct sk_buff *skb, unsigned char *src, int len) +{ + int tail_len; + unsigned long end, tail; + + if ((src + len) > skb_tail_pointer(skb) || skb->len < len) + return -1; + + tail = (unsigned long)skb_tail_pointer(skb); + end = (unsigned long)src + len; + if (tail < end) + return -1; + + tail_len = (int)(tail - end); + if (tail_len > 0) + memmove(src, src + len, tail_len); + + skb_trim(skb, skb->len - len); + return 0; +} + +static __inline__ unsigned long __nat25_timeout(_adapter *priv) +{ + unsigned long timeout; + + timeout = jiffies - NAT25_AGEING_TIME * HZ; + + return timeout; +} + + +static __inline__ int __nat25_has_expired(_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_pppoe_network_addr(unsigned char *networkAddr, + unsigned char *ac_mac, unsigned short *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); +} + + +#ifdef CL_IPV6_PASS +static void __nat25_generate_ipv6_network_addr(unsigned char *networkAddr, + unsigned int *ipAddr) +{ + memset(networkAddr, 0, MAX_NETWORK_ADDR_LEN); + + networkAddr[0] = NAT25_IPV6; + memcpy(networkAddr + 1, (unsigned char *)ipAddr, 16); +} + + +static unsigned char *scan_tlv(unsigned char *data, int len, unsigned char tag, unsigned char len8b) +{ + while (len > 0) { + if (*data == tag && *(data + 1) == len8b && len >= len8b * 8) + return data + 2; + + len -= (*(data + 1)) * 8; + data += (*(data + 1)) * 8; + } + return NULL; +} + + +static int update_nd_link_layer_addr(unsigned char *data, int len, unsigned char *replace_mac) +{ + struct icmp6hdr *icmphdr = (struct icmp6hdr *)data; + unsigned char *mac; + + if (icmphdr->icmp6_type == NDISC_ROUTER_SOLICITATION) { + if (len >= 8) { + mac = scan_tlv(&data[8], len - 8, 1, 1); + if (mac) { + RTW_INFO("Router Solicitation, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n", + mac[0], mac[1], mac[2], mac[3], mac[4], mac[5], + replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]); + memcpy(mac, replace_mac, 6); + return 1; + } + } + } else if (icmphdr->icmp6_type == NDISC_ROUTER_ADVERTISEMENT) { + if (len >= 16) { + mac = scan_tlv(&data[16], len - 16, 1, 1); + if (mac) { + RTW_INFO("Router Advertisement, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n", + mac[0], mac[1], mac[2], mac[3], mac[4], mac[5], + replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]); + memcpy(mac, replace_mac, 6); + return 1; + } + } + } else if (icmphdr->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) { + if (len >= 24) { + mac = scan_tlv(&data[24], len - 24, 1, 1); + if (mac) { + RTW_INFO("Neighbor Solicitation, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n", + mac[0], mac[1], mac[2], mac[3], mac[4], mac[5], + replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]); + memcpy(mac, replace_mac, 6); + return 1; + } + } + } else if (icmphdr->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { + if (len >= 24) { + mac = scan_tlv(&data[24], len - 24, 2, 1); + if (mac) { + RTW_INFO("Neighbor Advertisement, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n", + mac[0], mac[1], mac[2], mac[3], mac[4], mac[5], + replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]); + memcpy(mac, replace_mac, 6); + return 1; + } + } + } else if (icmphdr->icmp6_type == NDISC_REDIRECT) { + if (len >= 40) { + mac = scan_tlv(&data[40], len - 40, 2, 1); + if (mac) { + RTW_INFO("Redirect, replace MAC From: %02x:%02x:%02x:%02x:%02x:%02x, To: %02x:%02x:%02x:%02x:%02x:%02x\n", + mac[0], mac[1], mac[2], mac[3], mac[4], mac[5], + replace_mac[0], replace_mac[1], replace_mac[2], replace_mac[3], replace_mac[4], replace_mac[5]); + memcpy(mac, replace_mac, 6); + return 1; + } + } + } + return 0; +} + +#ifdef SUPPORT_RX_UNI2MCAST +static void convert_ipv6_mac_to_mc(struct sk_buff *skb) +{ + struct ipv6hdr *iph = (struct ipv6hdr *)(skb->data + ETH_HLEN); + unsigned char *dst_mac = skb->data; + + /* dst_mac[0] = 0xff; */ + /* dst_mac[1] = 0xff; */ + /*modified by qinjunjie,ipv6 multicast address ix 0x33-33-xx-xx-xx-xx*/ + dst_mac[0] = 0x33; + dst_mac[1] = 0x33; + memcpy(&dst_mac[2], &iph->daddr.s6_addr32[3], 4); +#if defined(__LINUX_2_6__) + /*modified by qinjunjie,warning:should not remove next line*/ + skb->pkt_type = PACKET_MULTICAST; +#endif +} +#endif /* CL_IPV6_PASS */ +#endif /* SUPPORT_RX_UNI2MCAST */ + + +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); + } +#ifdef CL_IPV6_PASS + 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); + } +#endif + 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(_adapter *priv, + struct nat25_network_db_entry *ent, int hash) +{ + /* Caller must _enter_critical_bh already! */ + /* _irqL irqL; */ + /* _enter_critical_bh(&priv->br_ext_lock, &irqL); */ + + 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]; + + /* _exit_critical_bh(&priv->br_ext_lock, &irqL); */ +} + + +static __inline__ void __network_hash_unlink(struct nat25_network_db_entry *ent) +{ + /* Caller must _enter_critical_bh already! */ + /* _irqL irqL; */ + /* _enter_critical_bh(&priv->br_ext_lock, &irqL); */ + + *(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; + + /* _exit_critical_bh(&priv->br_ext_lock, &irqL); */ +} + + +static int __nat25_db_network_lookup_and_replace(_adapter *priv, + struct sk_buff *skb, unsigned char *networkAddr) +{ + struct nat25_network_db_entry *db; + _irqL irqL; + _enter_critical_bh(&priv->br_ext_lock, &irqL); + + db = priv->nethash[__nat25_network_hash(networkAddr)]; + while (db != NULL) { + if (!memcmp(db->networkAddr, networkAddr, MAX_NETWORK_ADDR_LEN)) { + if (!__nat25_has_expired(priv, db)) { + /* replace the destination mac address */ + memcpy(skb->data, db->macAddr, ETH_ALEN); + atomic_inc(&db->use_count); + +#ifdef CL_IPV6_PASS + RTW_INFO("NAT25: Lookup M:%02x%02x%02x%02x%02x%02x N:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x" + "%02x%02x%02x%02x%02x%02x\n", + db->macAddr[0], + db->macAddr[1], + db->macAddr[2], + db->macAddr[3], + db->macAddr[4], + db->macAddr[5], + db->networkAddr[0], + db->networkAddr[1], + db->networkAddr[2], + db->networkAddr[3], + db->networkAddr[4], + db->networkAddr[5], + db->networkAddr[6], + db->networkAddr[7], + db->networkAddr[8], + db->networkAddr[9], + db->networkAddr[10], + db->networkAddr[11], + db->networkAddr[12], + db->networkAddr[13], + db->networkAddr[14], + db->networkAddr[15], + db->networkAddr[16]); +#else + RTW_INFO("NAT25: Lookup M:%02x%02x%02x%02x%02x%02x N:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n", + db->macAddr[0], + db->macAddr[1], + db->macAddr[2], + db->macAddr[3], + db->macAddr[4], + db->macAddr[5], + db->networkAddr[0], + db->networkAddr[1], + db->networkAddr[2], + db->networkAddr[3], + db->networkAddr[4], + db->networkAddr[5], + db->networkAddr[6], + db->networkAddr[7], + db->networkAddr[8], + db->networkAddr[9], + db->networkAddr[10]); +#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 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 */