diff options
Diffstat (limited to 'drivers/staging/r8188eu/core/rtw_br_ext.c')
| -rw-r--r-- | drivers/staging/r8188eu/core/rtw_br_ext.c | 658 |
1 files changed, 0 insertions, 658 deletions
diff --git a/drivers/staging/r8188eu/core/rtw_br_ext.c b/drivers/staging/r8188eu/core/rtw_br_ext.c deleted file mode 100644 index a7c67014dde0..000000000000 --- a/drivers/staging/r8188eu/core/rtw_br_ext.c +++ /dev/null @@ -1,658 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Copyright(c) 2007 - 2011 Realtek Corporation. i*/ - -#define _RTW_BR_EXT_C_ - -#include "../include/linux/if_arp.h" -#include "../include/net/ip.h" -#include "../include/linux/atalk.h" -#include "../include/linux/udp.h" -#include "../include/linux/if_pppox.h" - -#include "../include/drv_types.h" -#include "../include/rtw_br_ext.h" -#include "../include/usb_osintf.h" - -#ifndef csum_ipv6_magic -#include "../include/net/ip6_checksum.h" -#endif - -#include "../include/linux/ipv6.h" -#include "../include/linux/icmpv6.h" -#include "../include/net/ndisc.h" -#include "../include/net/checksum.h" - -#define NAT25_IPV4 01 -#define NAT25_IPV6 02 -#define NAT25_IPX 03 -#define NAT25_APPLE 04 -#define NAT25_PPPOE 05 - -#define RTL_RELAY_TAG_LEN (ETH_ALEN) -#define TAG_HDR_LEN 4 - -#define MAGIC_CODE 0x8186 -#define MAGIC_CODE_LEN 2 -#define WAIT_TIME_PPPOE 5 /* waiting time for pppoe server in sec */ - -/*----------------------------------------------------------------- - How database records network address: - 0 1 2 3 4 5 6 7 8 9 10 - |----|----|----|----|----|----|----|----|----|----|----| - IPv4 |type| | IP addr | - IPX |type| Net addr | Node addr | - IPX |type| Net addr |Sckt addr| - Apple |type| Network |node| - PPPoE |type| SID | AC MAC | ------------------------------------------------------------------*/ - -/* Find a tag in pppoe frame and return the pointer */ -static unsigned char *__nat25_find_pppoe_tag(struct pppoe_hdr *ph, unsigned short type) -{ - unsigned char *cur_ptr, *start_ptr; - unsigned short tag_len, tag_type; - - start_ptr = (unsigned char *)ph->tag; - cur_ptr = (unsigned char *)ph->tag; - while ((cur_ptr - start_ptr) < ntohs(ph->length)) { - /* prevent un-alignment access */ - tag_type = (unsigned short)((cur_ptr[0] << 8) + cur_ptr[1]); - tag_len = (unsigned short)((cur_ptr[2] << 8) + cur_ptr[3]); - if (tag_type == type) - return cur_ptr; - cur_ptr = cur_ptr + TAG_HDR_LEN + tag_len; - } - return NULL; -} - -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; - - data_len = be16_to_cpu(tag->tag_len) + TAG_HDR_LEN; - if (skb_tailroom(skb) < data_len) - 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 int __nat25_has_expired(struct nat25_network_db_entry *fdb) -{ - if (time_before_eq(fdb->ageing_timer, jiffies - NAT25_AGEING_TIME * HZ)) - return 1; - - return 0; -} - -static void __nat25_generate_ipv4_network_addr(unsigned char *addr, - unsigned int *ip_addr) -{ - memset(addr, 0, MAX_NETWORK_ADDR_LEN); - - addr[0] = NAT25_IPV4; - memcpy(addr + 7, (unsigned char *)ip_addr, 4); -} - -static void __nat25_generate_pppoe_network_addr(unsigned char *addr, - unsigned char *ac_mac, __be16 *sid) -{ - memset(addr, 0, MAX_NETWORK_ADDR_LEN); - - addr[0] = NAT25_PPPOE; - memcpy(addr + 1, (unsigned char *)sid, 2); - memcpy(addr + 3, (unsigned char *)ac_mac, 6); -} - -static void __nat25_generate_ipv6_network_addr(unsigned char *addr, - unsigned int *ip_addr) -{ - memset(addr, 0, MAX_NETWORK_ADDR_LEN); - - addr[0] = NAT25_IPV6; - memcpy(addr + 1, (unsigned char *)ip_addr, 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) { - 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) { - 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) { - 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) { - 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) { - memcpy(mac, replace_mac, 6); - return 1; - } - } - } - return 0; -} - -static int __nat25_network_hash(unsigned char *addr) -{ - if (addr[0] == NAT25_IPV4) { - unsigned long x; - - x = addr[7] ^ addr[8] ^ addr[9] ^ addr[10]; - - return x & (NAT25_HASH_SIZE - 1); - } else if (addr[0] == NAT25_IPX) { - unsigned long x; - - x = addr[1] ^ addr[2] ^ addr[3] ^ addr[4] ^ addr[5] ^ - addr[6] ^ addr[7] ^ addr[8] ^ addr[9] ^ addr[10]; - - return x & (NAT25_HASH_SIZE - 1); - } else if (addr[0] == NAT25_APPLE) { - unsigned long x; - - x = addr[1] ^ addr[2] ^ addr[3]; - - return x & (NAT25_HASH_SIZE - 1); - } else if (addr[0] == NAT25_PPPOE) { - unsigned long x; - - x = addr[0] ^ addr[1] ^ addr[2] ^ addr[3] ^ addr[4] ^ - addr[5] ^ addr[6] ^ addr[7] ^ addr[8]; - - return x & (NAT25_HASH_SIZE - 1); - } else if (addr[0] == NAT25_IPV6) { - unsigned long x; - - x = addr[1] ^ addr[2] ^ addr[3] ^ addr[4] ^ addr[5] ^ addr[6] ^ - addr[7] ^ addr[8] ^ addr[9] ^ addr[10] ^ addr[11] ^ addr[12] ^ - addr[13] ^ addr[14] ^ addr[15] ^ addr[16]; - - return x & (NAT25_HASH_SIZE - 1); - } else { - unsigned long x = 0; - int i; - - for (i = 0; i < MAX_NETWORK_ADDR_LEN; i++) - x ^= addr[i]; - - return x & (NAT25_HASH_SIZE - 1); - } -} - -static void __network_hash_link(struct adapter *priv, - struct nat25_network_db_entry *ent, int hash) -{ - /* Caller must spin_lock already! */ - ent->next_hash = priv->nethash[hash]; - if (ent->next_hash) - ent->next_hash->pprev_hash = &ent->next_hash; - priv->nethash[hash] = ent; - ent->pprev_hash = &priv->nethash[hash]; -} - -static void __network_hash_unlink(struct nat25_network_db_entry *ent) -{ - /* Caller must spin_lock already! */ - *ent->pprev_hash = ent->next_hash; - if (ent->next_hash) - ent->next_hash->pprev_hash = ent->pprev_hash; - ent->next_hash = NULL; - ent->pprev_hash = NULL; -} - -static void __nat25_db_network_insert(struct adapter *priv, - unsigned char *mac_addr, unsigned char *addr) -{ - struct nat25_network_db_entry *db; - int hash; - - spin_lock_bh(&priv->br_ext_lock); - hash = __nat25_network_hash(addr); - db = priv->nethash[hash]; - while (db) { - if (!memcmp(db->networkAddr, addr, MAX_NETWORK_ADDR_LEN)) { - memcpy(db->macAddr, mac_addr, ETH_ALEN); - db->ageing_timer = jiffies; - spin_unlock_bh(&priv->br_ext_lock); - return; - } - db = db->next_hash; - } - db = kmalloc(sizeof(*db), GFP_ATOMIC); - if (!db) { - spin_unlock_bh(&priv->br_ext_lock); - return; - } - memcpy(db->networkAddr, addr, MAX_NETWORK_ADDR_LEN); - memcpy(db->macAddr, mac_addr, ETH_ALEN); - atomic_set(&db->use_count, 1); - db->ageing_timer = jiffies; - - __network_hash_link(priv, db, hash); - - spin_unlock_bh(&priv->br_ext_lock); -} - -/* - * NAT2.5 interface - */ - -void nat25_db_cleanup(struct adapter *priv) -{ - int i; - - spin_lock_bh(&priv->br_ext_lock); - - for (i = 0; i < NAT25_HASH_SIZE; i++) { - struct nat25_network_db_entry *f; - - f = priv->nethash[i]; - while (f) { - 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); - kfree(f); - f = g; - } - } - spin_unlock_bh(&priv->br_ext_lock); -} - -void nat25_db_expire(struct adapter *priv) -{ - int i; - - spin_lock_bh(&priv->br_ext_lock); - - for (i = 0; i < NAT25_HASH_SIZE; i++) { - struct nat25_network_db_entry *f; - - f = priv->nethash[i]; - while (f) { - struct nat25_network_db_entry *g; - - g = f->next_hash; - if (__nat25_has_expired(f)) { - if (atomic_dec_and_test(&f->use_count)) { - if (priv->scdb_entry == f) { - memset(priv->scdb_mac, 0, ETH_ALEN); - memset(priv->scdb_ip, 0, 4); - priv->scdb_entry = NULL; - } - __network_hash_unlink(f); - kfree(f); - } - } - f = g; - } - } - spin_unlock_bh(&priv->br_ext_lock); -} - -int nat25_db_handle(struct adapter *priv, struct sk_buff *skb, int method) -{ - unsigned short protocol; - unsigned char addr[MAX_NETWORK_ADDR_LEN]; - unsigned int tmp; - - if (!skb) - return -1; - - if ((method <= NAT25_MIN) || (method >= NAT25_MAX)) - return -1; - - protocol = be16_to_cpu(*((__be16 *)(skb->data + 2 * ETH_ALEN))); - - /*---------------------------------------------------*/ - /* Handle IP frame */ - /*---------------------------------------------------*/ - if (protocol == ETH_P_IP) { - struct iphdr *iph = (struct iphdr *)(skb->data + ETH_HLEN); - - if (((unsigned char *)(iph) + (iph->ihl << 2)) >= (skb->data + ETH_HLEN + skb->len)) - return -1; - - switch (method) { - case NAT25_CHECK: - return -1; - case NAT25_INSERT: - /* some multicast with source IP is all zero, maybe other case is illegal */ - /* in class A, B, C, host address is all zero or all one is illegal */ - if (iph->saddr == 0) - return 0; - tmp = be32_to_cpu(iph->saddr); - __nat25_generate_ipv4_network_addr(addr, &tmp); - /* record source IP address and , source mac address into db */ - __nat25_db_network_insert(priv, skb->data + ETH_ALEN, addr); - return 0; - default: - return -1; - } - } else if (protocol == ETH_P_ARP) { - /*---------------------------------------------------*/ - /* Handle ARP frame */ - /*---------------------------------------------------*/ - struct arphdr *arp = (struct arphdr *)(skb->data + ETH_HLEN); - unsigned char *arp_ptr = (unsigned char *)(arp + 1); - unsigned int *sender; - - if (arp->ar_pro != htons(ETH_P_IP)) - return -1; - - switch (method) { - case NAT25_CHECK: - return 0; /* skb_copy for all ARP frame */ - case NAT25_INSERT: - /* 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(addr, sender); - __nat25_db_network_insert(priv, skb->data + ETH_ALEN, addr); - return 0; - default: - return -1; - } - } else if ((protocol == ETH_P_PPP_DISC) || - (protocol == ETH_P_PPP_SES)) { - /*---------------------------------------------------*/ - /* Handle PPPoE frame */ - /*---------------------------------------------------*/ - struct pppoe_hdr *ph = (struct pppoe_hdr *)(skb->data + ETH_HLEN); - __be16 *pMagic; - - switch (method) { - case NAT25_CHECK: - if (ph->sid == 0) - return 0; - return 1; - case NAT25_INSERT: - if (ph->sid == 0) { /* Discovery phase according to tag */ - if (ph->code == PADI_CODE || ph->code == PADR_CODE) { - if (priv->ethBrExtInfo.addPPPoETag) { - struct pppoe_tag *tag, *pOldTag; - unsigned char tag_buf[40]; - int old_tag_len = 0; - - tag = (struct pppoe_tag *)tag_buf; - pOldTag = (struct pppoe_tag *)__nat25_find_pppoe_tag(ph, ntohs(PTT_RELAY_SID)); - if (pOldTag) { /* if SID existed, copy old value and delete it */ - old_tag_len = ntohs(pOldTag->tag_len); - if (old_tag_len + - TAG_HDR_LEN + - MAGIC_CODE_LEN + - RTL_RELAY_TAG_LEN > - sizeof(tag_buf)) - 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) - return -1; - - ph->length = htons(ntohs(ph->length) - TAG_HDR_LEN - old_tag_len); - } - - tag->tag_type = PTT_RELAY_SID; - tag->tag_len = htons(MAGIC_CODE_LEN + RTL_RELAY_TAG_LEN + old_tag_len); - - /* insert the magic_code+client mac in relay tag */ - pMagic = (__be16 *)tag->tag_data; - *pMagic = htons(MAGIC_CODE); - memcpy(tag->tag_data + MAGIC_CODE_LEN, skb->data + ETH_ALEN, ETH_ALEN); - - /* Add relay tag */ - if (__nat25_add_pppoe_tag(skb, tag) < 0) - return -1; - } else { /* not add relay tag */ - if (priv->pppoe_connection_in_progress && - memcmp(skb->data + ETH_ALEN, - priv->pppoe_addr, - ETH_ALEN)) - 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 */ - __nat25_generate_pppoe_network_addr(addr, skb->data, &ph->sid); - - __nat25_db_network_insert(priv, skb->data + ETH_ALEN, addr); - - 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; - default: - return -1; - } - } else if (protocol == 0x888e) { - /*---------------------------------------------------*/ - /* Handle EAP frame */ - /*---------------------------------------------------*/ - switch (method) { - case NAT25_CHECK: - return -1; - case NAT25_INSERT: - return 0; - default: - return -1; - } - } else if ((protocol == 0xe2ae) || (protocol == 0xe2af)) { - /*---------------------------------------------------*/ - /* Handle C-Media proprietary frame */ - /*---------------------------------------------------*/ - switch (method) { - case NAT25_CHECK: - return -1; - case NAT25_INSERT: - return 0; - default: - return -1; - } - } else if (protocol == ETH_P_IPV6) { - /*------------------------------------------------*/ - /* Handle IPV6 frame */ - /*------------------------------------------------*/ - struct ipv6hdr *iph = (struct ipv6hdr *)(skb->data + ETH_HLEN); - - if (sizeof(*iph) >= (skb->len - ETH_HLEN)) - return -1; - - switch (method) { - case NAT25_CHECK: - if (skb->data[0] & 1) - return 0; - return -1; - case NAT25_INSERT: - 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(addr, (unsigned int *)&iph->saddr); - __nat25_db_network_insert(priv, skb->data + ETH_ALEN, addr); - - if (iph->nexthdr == IPPROTO_ICMPV6 && - skb->len > (ETH_HLEN + sizeof(*iph) + 4)) { - if (update_nd_link_layer_addr(skb->data + ETH_HLEN + sizeof(*iph), - skb->len - ETH_HLEN - sizeof(*iph), GET_MY_HWADDR(priv))) { - struct icmp6hdr *hdr = (struct icmp6hdr *)(skb->data + ETH_HLEN + sizeof(*iph)); - hdr->icmp6_cksum = 0; - hdr->icmp6_cksum = csum_ipv6_magic(&iph->saddr, &iph->daddr, - be16_to_cpu(iph->payload_len), - IPPROTO_ICMPV6, - csum_partial((__u8 *)hdr, - be16_to_cpu(iph->payload_len), - 0)); - } - } - } - return 0; - default: - return -1; - } - } - return -1; -} - -#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; - __be16 secs; - __be16 flags; - __be32 ciaddr; - __be32 yiaddr; - __be32 siaddr; - __be32 giaddr; - u_int8_t chaddr[16]; - u_int8_t sname[64]; - u_int8_t file[128]; - __be32 cookie; - u_int8_t options[308]; /* 312 - cookie */ -}; - -void dhcp_flag_bcast(struct adapter *priv, struct sk_buff *skb) -{ - if (!skb) - return; - - if (!priv->ethBrExtInfo.dhcp_bcst_disable) { - __be16 protocol = *((__be16 *)(skb->data + 2 * ETH_ALEN)); - - if (protocol == htons(ETH_P_IP)) { /* IP */ - struct iphdr *iph = (struct iphdr *)(skb->data + ETH_HLEN); - - if (iph->protocol == IPPROTO_UDP) { /* UDP */ - struct udphdr *udph = (void *)iph + (iph->ihl << 2); - - if ((udph->source == htons(CLIENT_PORT)) && - (udph->dest == htons(SERVER_PORT))) { /* DHCP request */ - struct dhcpMessage *dhcph = (void *)udph + sizeof(struct udphdr); - u32 cookie = be32_to_cpu(dhcph->cookie); - - if (cookie == DHCP_MAGIC) { /* match magic word */ - if (!(dhcph->flags & htons(BROADCAST_FLAG))) { - /* if not broadcast */ - register int sum = 0; - - /* or BROADCAST flag */ - dhcph->flags |= htons(BROADCAST_FLAG); - /* recalculate checksum */ - sum = ~(udph->check) & 0xffff; - sum += be16_to_cpu(dhcph->flags); - while (sum >> 16) - sum = (sum & 0xffff) + (sum >> 16); - udph->check = ~sum; - } - } - } - } - } - } -} - -void *scdb_findEntry(struct adapter *priv, unsigned char *ip_addr) -{ - unsigned char addr[MAX_NETWORK_ADDR_LEN]; - struct nat25_network_db_entry *db; - int hash; - - __nat25_generate_ipv4_network_addr(addr, (unsigned int *)ip_addr); - hash = __nat25_network_hash(addr); - db = priv->nethash[hash]; - while (db) { - if (!memcmp(db->networkAddr, addr, MAX_NETWORK_ADDR_LEN)) - return (void *)db; - - db = db->next_hash; - } - - return NULL; -} |