zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/net/bridge/br_fdb.c b/ap/os/linux/linux-3.4.x/net/bridge/br_fdb.c
new file mode 100755
index 0000000..0c22ff3
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/bridge/br_fdb.c
@@ -0,0 +1,1069 @@
+/*
+ * Forwarding database
+ * Linux ethernet bridge
+ *
+ * Authors:
+ * Lennert Buytenhek <buytenh@gnu.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/rculist.h>
+#include <linux/spinlock.h>
+#include <linux/times.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/jhash.h>
+#include <linux/random.h>
+#include <linux/slab.h>
+#include <linux/atomic.h>
+#include <linux/export.h>
+#include <asm/unaligned.h>
+#include <net/SI/fast_common.h>
+#include "br_private.h"
+
+static struct kmem_cache *br_fdb_cache __read_mostly;
+static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
+ const unsigned char *addr);
+static void fdb_notify(struct net_bridge *br,
+ const struct net_bridge_fdb_entry *, int);
+
+static u32 fdb_salt __read_mostly;
+
+
+int __init br_fdb_init(void)
+{
+ br_fdb_cache = kmem_cache_create("bridge_fdb_cache",
+ sizeof(struct net_bridge_fdb_entry),
+ 0,
+ SLAB_HWCACHE_ALIGN, NULL);
+ if (!br_fdb_cache)
+ return -ENOMEM;
+
+ get_random_bytes(&fdb_salt, sizeof(fdb_salt));
+ return 0;
+}
+
+void br_fdb_fini(void)
+{
+ kmem_cache_destroy(br_fdb_cache);
+}
+
+
+/* if topology_changing then use forward_delay (default 15 sec)
+ * otherwise keep longer (default 5 minutes)
+ */
+static inline unsigned long hold_time(const struct net_bridge *br)
+{
+ return br->topology_change ? br->forward_delay : br->ageing_time;
+}
+
+static inline int has_expired(const struct net_bridge *br,
+ const struct net_bridge_fdb_entry *fdb)
+{
+ return !fdb->is_static &&
+ time_before_eq(fdb->updated + hold_time(br), jiffies);
+}
+
+static inline int br_mac_hash(const unsigned char *mac)
+{
+ /* use 1 byte of OUI cnd 3 bytes of NIC */
+ u32 key = get_unaligned((u32 *)(mac + 2));
+ return jhash_1word(key, fdb_salt) & (BR_HASH_SIZE - 1);
+}
+int netdog_mac_hash(const unsigned char *mac)
+{
+ return br_mac_hash(mac);
+}
+static void fdb_rcu_free(struct rcu_head *head)
+{
+ struct net_bridge_fdb_entry *ent
+ = container_of(head, struct net_bridge_fdb_entry, rcu);
+ netslab_dec(BRFDB_SLAB);
+ kmem_cache_free(br_fdb_cache, ent);
+}
+
+static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f)
+{
+ hlist_del_rcu(&f->hlist);
+ fdb_notify(br, f, RTM_DELNEIGH);
+ call_rcu(&f->rcu, fdb_rcu_free);
+}
+
+void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr)
+{
+ struct net_bridge *br = p->br;
+ int i;
+
+ spin_lock_bh(&br->hash_lock);
+
+ /* Search all chains since old address/hash is unknown */
+ for (i = 0; i < BR_HASH_SIZE; i++) {
+ struct hlist_node *h;
+ hlist_for_each(h, &br->hash[i]) {
+ struct net_bridge_fdb_entry *f;
+
+ f = hlist_entry(h, struct net_bridge_fdb_entry, hlist);
+ if (f->dst == p && f->is_local) {
+ /* maybe another port has same hw addr? */
+ struct net_bridge_port *op;
+ list_for_each_entry(op, &br->port_list, list) {
+ if (op != p &&
+ !compare_ether_addr(op->dev->dev_addr,
+ f->addr.addr)) {
+ f->dst = op;
+ goto insert;
+ }
+ }
+
+ /* delete old one */
+ fdb_delete(br, f);
+ goto insert;
+ }
+ }
+ }
+ insert:
+ /* insert new address, may fail if invalid address or dup. */
+ fdb_insert(br, p, newaddr);
+
+ spin_unlock_bh(&br->hash_lock);
+}
+
+void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr)
+{
+ struct net_bridge_fdb_entry *f;
+
+ /* If old entry was unassociated with any port, then delete it. */
+ f = __br_fdb_get(br, br->dev->dev_addr);
+ if (f && f->is_local && !f->dst)
+ fdb_delete(br, f);
+
+ fdb_insert(br, NULL, newaddr);
+}
+
+void br_fdb_cleanup(unsigned long _data)
+{
+ struct net_bridge *br = (struct net_bridge *)_data;
+ unsigned long delay = hold_time(br);
+ unsigned long next_timer = jiffies + br->ageing_time;
+ int i;
+
+ spin_lock(&br->hash_lock);
+ for (i = 0; i < BR_HASH_SIZE; i++) {
+ struct net_bridge_fdb_entry *f;
+ struct hlist_node *h, *n;
+
+ hlist_for_each_entry_safe(f, h, n, &br->hash[i], hlist) {
+ unsigned long this_timer;
+ if (f->is_static)
+ continue;
+ this_timer = f->updated + delay;
+ if (time_before_eq(this_timer, jiffies))
+ fdb_delete(br, f);
+ else if (time_before(this_timer, next_timer))
+ next_timer = this_timer;
+ }
+ }
+ spin_unlock(&br->hash_lock);
+
+ mod_timer(&br->gc_timer, round_jiffies_up(next_timer));
+}
+
+/* Completely flush all dynamic entries in forwarding database.*/
+void br_fdb_flush(struct net_bridge *br)
+{
+ int i;
+
+ spin_lock_bh(&br->hash_lock);
+ for (i = 0; i < BR_HASH_SIZE; i++) {
+ struct net_bridge_fdb_entry *f;
+ struct hlist_node *h, *n;
+ hlist_for_each_entry_safe(f, h, n, &br->hash[i], hlist) {
+ if (!f->is_static)
+ fdb_delete(br, f);
+ }
+ }
+ spin_unlock_bh(&br->hash_lock);
+}
+
+/* Flush all entries referring to a specific port.
+ * if do_all is set also flush static entries
+ */
+void br_fdb_delete_by_port(struct net_bridge *br,
+ const struct net_bridge_port *p,
+ int do_all)
+{
+ int i;
+
+ spin_lock_bh(&br->hash_lock);
+ for (i = 0; i < BR_HASH_SIZE; i++) {
+ struct hlist_node *h, *g;
+
+ hlist_for_each_safe(h, g, &br->hash[i]) {
+ struct net_bridge_fdb_entry *f
+ = hlist_entry(h, struct net_bridge_fdb_entry, hlist);
+ if (f->dst != p)
+ continue;
+
+ if (f->is_static && !do_all)
+ continue;
+ /*
+ * if multiple ports all have the same device address
+ * then when one port is deleted, assign
+ * the local entry to other port
+ */
+ if (f->is_local) {
+ struct net_bridge_port *op;
+ list_for_each_entry(op, &br->port_list, list) {
+ if (op != p &&
+ !compare_ether_addr(op->dev->dev_addr,
+ f->addr.addr)) {
+ f->dst = op;
+ goto skip_delete;
+ }
+ }
+ }
+
+ fdb_delete(br, f);
+ skip_delete: ;
+ }
+ }
+ spin_unlock_bh(&br->hash_lock);
+}
+
+/* No locking or refcounting, assumes caller has rcu_read_lock */
+struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
+ const unsigned char *addr)
+{
+ struct hlist_node *h;
+ struct net_bridge_fdb_entry *fdb;
+
+ hlist_for_each_entry_rcu(fdb, h, &br->hash[br_mac_hash(addr)], hlist) {
+ if (!compare_ether_addr(fdb->addr.addr, addr)) {
+ if (unlikely(has_expired(br, fdb)))
+ break;
+ return fdb;
+ }
+ }
+
+ return NULL;
+}
+
+#if IS_ENABLED(CONFIG_ATM_LANE)
+/* Interface used by ATM LANE hook to test
+ * if an addr is on some other bridge port */
+int br_fdb_test_addr(struct net_device *dev, unsigned char *addr)
+{
+ struct net_bridge_fdb_entry *fdb;
+ struct net_bridge_port *port;
+ int ret;
+
+ rcu_read_lock();
+ port = br_port_get_rcu(dev);
+ if (!port)
+ ret = 0;
+ else {
+ fdb = __br_fdb_get(port->br, addr);
+ ret = fdb && fdb->dst && fdb->dst->dev != dev &&
+ fdb->dst->state == BR_STATE_FORWARDING;
+ }
+ rcu_read_unlock();
+
+ return ret;
+}
+#endif /* CONFIG_ATM_LANE */
+
+/*
+ * Fill buffer with forwarding table records in
+ * the API format.
+ */
+int br_fdb_fillbuf(struct net_bridge *br, void *buf,
+ unsigned long maxnum, unsigned long skip)
+{
+ struct __fdb_entry *fe = buf;
+ int i, num = 0;
+ struct hlist_node *h;
+ struct net_bridge_fdb_entry *f;
+
+ memset(buf, 0, maxnum*sizeof(struct __fdb_entry));
+
+ rcu_read_lock();
+ for (i = 0; i < BR_HASH_SIZE; i++) {
+ hlist_for_each_entry_rcu(f, h, &br->hash[i], hlist) {
+ if (num >= maxnum)
+ goto out;
+
+ if (has_expired(br, f))
+ continue;
+
+ /* ignore pseudo entry for local MAC address */
+ if (!f->dst)
+ continue;
+
+ if (skip) {
+ --skip;
+ continue;
+ }
+
+ /* convert from internal format to API */
+ memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN);
+
+ /* due to ABI compat need to split into hi/lo */
+ fe->port_no = f->dst->port_no;
+ fe->port_hi = f->dst->port_no >> 8;
+
+ fe->is_local = f->is_local;
+ if (!f->is_static)
+ fe->ageing_timer_value = jiffies_to_clock_t(jiffies - f->updated);
+ ++fe;
+ ++num;
+ }
+ }
+
+ out:
+ rcu_read_unlock();
+
+ return num;
+}
+
+static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head,
+ const unsigned char *addr)
+{
+ struct hlist_node *h;
+ struct net_bridge_fdb_entry *fdb;
+
+ hlist_for_each_entry(fdb, h, head, hlist) {
+ if (!compare_ether_addr(fdb->addr.addr, addr))
+ return fdb;
+ }
+ return NULL;
+}
+
+static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head,
+ const unsigned char *addr)
+{
+ struct hlist_node *h;
+ struct net_bridge_fdb_entry *fdb;
+
+ hlist_for_each_entry_rcu(fdb, h, head, hlist) {
+ if (!compare_ether_addr(fdb->addr.addr, addr))
+ return fdb;
+ }
+ return NULL;
+}
+
+static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head,
+ struct net_bridge_port *source,
+ const unsigned char *addr)
+{
+ struct net_bridge_fdb_entry *fdb;
+ fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC);
+ if (fdb) {
+ netslab_inc(BRFDB_SLAB);
+ netruninfo_add(NULL, BRFDB_ALLOC);
+ memcpy(fdb->addr.addr, addr, ETH_ALEN);
+ fdb->dst = source;
+ fdb->is_local = 0;
+ fdb->is_static = 0;
+ fdb->updated = fdb->used = jiffies;
+ hlist_add_head_rcu(&fdb->hlist, head);
+ net_run_track(PRT_BR,"create");
+ }
+ return fdb;
+}
+
+static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
+ const unsigned char *addr)
+{
+ struct hlist_head *head = &br->hash[br_mac_hash(addr)];
+ struct net_bridge_fdb_entry *fdb;
+
+ if (!is_valid_ether_addr(addr))
+ return -EINVAL;
+
+ fdb = fdb_find(head, addr);
+ if (fdb) {
+ /* it is okay to have multiple ports with same
+ * address, just use the first one.
+ */
+ if (fdb->is_local)
+ return 0;
+ br_warn(br, "adding interface %s with same address "
+ "as a received packet\n",
+ source->dev->name);
+ fdb_delete(br, fdb);
+ }
+
+ fdb = fdb_create(head, source, addr);
+ if (!fdb)
+ return -ENOMEM;
+
+ fdb->is_local = fdb->is_static = 1;
+ fdb_notify(br, fdb, RTM_NEWNEIGH);
+ return 0;
+}
+
+/* Add entry for local address of interface */
+int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
+ const unsigned char *addr)
+{
+ int ret;
+
+ spin_lock_bh(&br->hash_lock);
+ ret = fdb_insert(br, source, addr);
+ spin_unlock_bh(&br->hash_lock);
+ return ret;
+}
+
+
+//add by zhudeming Ìí¼ÓÒì³£ÁÚ¾ÓÁбí¸üУ¬µ±´æÔÚÁ½¸öÒì³£macµØַʱ£¬
+//Ìṩ¶ÔÆäÖÐÒ»¸öµØÖ·µÄ¼æÈÝÅжÏ
+int brmoniter_flag = 0;
+int usbhaved = 0;
+unsigned char ignoremac[ETH_ALEN] = {0};
+unsigned char usbmac[ETH_ALEN] = {0};
+
+void br_fdb_moniter(struct net_bridge_port *source, const unsigned char *addr)
+{
+ if(brmoniter_flag)
+ {
+ if(usbhaved == 0)
+ {
+ usbhaved == 1;
+ memcpy(usbmac, addr, ETH_ALEN);
+ }
+ else if(source->dev&& strncmp(source->dev->name,"usb",3)==0)
+ {
+ if ( (strncmp(addr, usbmac, ETH_ALEN) != 0) && (strncmp(addr, ignoremac, ETH_ALEN) != 0) )
+ {
+ panic("set wrong neigh table for usb!!!");
+ }
+ }
+ }
+}
+
+
+void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
+ const unsigned char *addr)
+{
+ struct hlist_head *head = &br->hash[br_mac_hash(addr)];
+ struct net_bridge_fdb_entry *fdb;
+
+ /* some users want to always flood. */
+ if (hold_time(br) == 0)
+ return;
+
+ /* ignore packets unless we are using this port */
+ if (!(source->state == BR_STATE_LEARNING ||
+ source->state == BR_STATE_FORWARDING))
+ return;
+
+ fdb = fdb_find_rcu(head, addr);
+ if (likely(fdb)) {
+ /* attempt to update an entry for a local interface */
+ if(fdb->dst && fdb->dst->dev && source->dev && fdb->dst->dev->ifindex != source->dev->ifindex){
+ netruninfo_add(NULL,SSMAC_CHANGE_INDEV);
+ }
+ if (unlikely(fdb->is_local)) {
+ if (net_ratelimit())
+ br_warn(br, "received packet on %s with "
+ "own address as source address\n",
+ source->dev->name);
+ } else {
+ /* fastpath: update of existing entry */
+ /*add by jiangjing*/
+ if(fdb->dst!=NULL && fdb->dst != source)
+ {
+ netruninfo_add(NULL, BR_NEIGH_VARY);
+ //panic("br_fdb_update err: %s received data ,source mac addr is %s addr,should is %s mac addr!\n",
+ //source->dev->name,fdb->dst->dev->name,source->dev->name);
+ }
+ fdb->dst = source;
+ fdb->updated = jiffies;
+ }
+ } else {
+ spin_lock_bh(&br->hash_lock);
+ if (likely(!fdb_find(head, addr))) {
+
+ //add by zhudeming
+ br_fdb_moniter(source, addr);
+
+ fdb = fdb_create(head, source, addr);
+ if (fdb)
+ fdb_notify(br, fdb, RTM_NEWNEIGH);
+ }
+ /* else we lose race and someone else inserts
+ * it first, don't bother updating
+ */
+ spin_unlock_bh(&br->hash_lock);
+ }
+}
+
+static int fdb_to_nud(const struct net_bridge_fdb_entry *fdb)
+{
+ if (fdb->is_local)
+ return NUD_PERMANENT;
+ else if (fdb->is_static)
+ return NUD_NOARP;
+ else if (has_expired(fdb->dst->br, fdb))
+ return NUD_STALE;
+ else
+ return NUD_REACHABLE;
+}
+
+static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br,
+ const struct net_bridge_fdb_entry *fdb,
+ u32 pid, u32 seq, int type, unsigned int flags)
+{
+ unsigned long now = jiffies;
+ struct nda_cacheinfo ci;
+ struct nlmsghdr *nlh;
+ struct ndmsg *ndm;
+
+ nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), flags);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ ndm = nlmsg_data(nlh);
+ ndm->ndm_family = AF_BRIDGE;
+ ndm->ndm_pad1 = 0;
+ ndm->ndm_pad2 = 0;
+ ndm->ndm_flags = 0;
+ ndm->ndm_type = 0;
+ ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex;
+ ndm->ndm_state = fdb_to_nud(fdb);
+
+ NLA_PUT(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr);
+
+ ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
+ ci.ndm_confirmed = 0;
+ ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
+ ci.ndm_refcnt = 0;
+ NLA_PUT(skb, NDA_CACHEINFO, sizeof(ci), &ci);
+
+ return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+static inline size_t fdb_nlmsg_size(void)
+{
+ return NLMSG_ALIGN(sizeof(struct ndmsg))
+ + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
+ + nla_total_size(sizeof(struct nda_cacheinfo));
+}
+
+static void fdb_notify(struct net_bridge *br,
+ const struct net_bridge_fdb_entry *fdb, int type)
+{
+ struct net *net = dev_net(br->dev);
+ struct sk_buff *skb;
+ int err = -ENOBUFS;
+
+ skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC);
+ if (skb == NULL)
+ goto errout;
+
+ err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0);
+ if (err < 0) {
+ /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */
+ WARN_ON(err == -EMSGSIZE);
+ kfree_skb(skb);
+ goto errout;
+ }
+ //print_sun(SUN_LEARN,"dev:%s,fdb_notify::rtnl_notify;type=%d,for example RTM_NEWNEIGH",br->dev->name,type);
+ rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
+ return;
+errout:
+ if (err < 0)
+ rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
+}
+
+/* Dump information about entries, in response to GETNEIGH */
+int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct net *net = sock_net(skb->sk);
+ struct net_device *dev;
+ int idx = 0;
+
+ rcu_read_lock();
+ for_each_netdev_rcu(net, dev) {
+ struct net_bridge *br = netdev_priv(dev);
+ int i;
+
+ if (!(dev->priv_flags & IFF_EBRIDGE))
+ continue;
+
+ for (i = 0; i < BR_HASH_SIZE; i++) {
+ struct hlist_node *h;
+ struct net_bridge_fdb_entry *f;
+
+ hlist_for_each_entry_rcu(f, h, &br->hash[i], hlist) {
+ if (idx < cb->args[0])
+ goto skip;
+
+ if (fdb_fill_info(skb, br, f,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq,
+ RTM_NEWNEIGH,
+ NLM_F_MULTI) < 0)
+ break;
+skip:
+ ++idx;
+ }
+ }
+ }
+ rcu_read_unlock();
+
+ cb->args[0] = idx;
+
+ return skb->len;
+}
+
+/* Update (create or replace) forwarding database entry */
+static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr,
+ __u16 state, __u16 flags)
+{
+ struct net_bridge *br = source->br;
+ struct hlist_head *head = &br->hash[br_mac_hash(addr)];
+ struct net_bridge_fdb_entry *fdb;
+
+ fdb = fdb_find(head, addr);
+ if (fdb == NULL) {
+ if (!(flags & NLM_F_CREATE))
+ return -ENOENT;
+
+ fdb = fdb_create(head, source, addr);
+ if (!fdb)
+ return -ENOMEM;
+ fdb_notify(br, fdb, RTM_NEWNEIGH);
+ } else {
+ if (flags & NLM_F_EXCL)
+ return -EEXIST;
+ }
+
+ if (fdb_to_nud(fdb) != state) {
+ if (state & NUD_PERMANENT)
+ fdb->is_local = fdb->is_static = 1;
+ else if (state & NUD_NOARP) {
+ fdb->is_local = 0;
+ fdb->is_static = 1;
+ } else
+ fdb->is_local = fdb->is_static = 0;
+
+ fdb->updated = fdb->used = jiffies;
+ fdb_notify(br, fdb, RTM_NEWNEIGH);
+ }
+
+ return 0;
+}
+
+/* Add new permanent fdb entry with RTM_NEWNEIGH */
+int br_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+ struct net *net = sock_net(skb->sk);
+ struct ndmsg *ndm;
+ struct nlattr *tb[NDA_MAX+1];
+ struct net_device *dev;
+ struct net_bridge_port *p;
+ const __u8 *addr;
+ int err;
+
+ ASSERT_RTNL();
+ err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
+ if (err < 0)
+ return err;
+
+ ndm = nlmsg_data(nlh);
+ if (ndm->ndm_ifindex == 0) {
+ pr_info("bridge: RTM_NEWNEIGH with invalid ifindex\n");
+ return -EINVAL;
+ }
+
+ dev = __dev_get_by_index(net, ndm->ndm_ifindex);
+ if (dev == NULL) {
+ pr_info("bridge: RTM_NEWNEIGH with unknown ifindex\n");
+ return -ENODEV;
+ }
+
+ if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
+ pr_info("bridge: RTM_NEWNEIGH with invalid address\n");
+ return -EINVAL;
+ }
+
+ addr = nla_data(tb[NDA_LLADDR]);
+ if (!is_valid_ether_addr(addr)) {
+ pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n");
+ return -EINVAL;
+ }
+
+ if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) {
+ pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state);
+ return -EINVAL;
+ }
+
+ p = br_port_get_rtnl(dev);
+ if (p == NULL) {
+ pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n",
+ dev->name);
+ return -EINVAL;
+ }
+
+ if (ndm->ndm_flags & NTF_USE) {
+ local_bh_disable();
+ rcu_read_lock();
+ br_fdb_update(p->br, p, addr);
+ rcu_read_unlock();
+ local_bh_enable();
+ } else {
+ spin_lock_bh(&p->br->hash_lock);
+ err = fdb_add_entry(p, addr, ndm->ndm_state, nlh->nlmsg_flags);
+ spin_unlock_bh(&p->br->hash_lock);
+ }
+
+ return err;
+}
+
+static int fdb_delete_by_addr(struct net_bridge_port *p, const u8 *addr)
+{
+ struct net_bridge *br = p->br;
+ struct hlist_head *head = &br->hash[br_mac_hash(addr)];
+ struct net_bridge_fdb_entry *fdb;
+
+ fdb = fdb_find(head, addr);
+ if (!fdb)
+ return -ENOENT;
+
+ fdb_delete(p->br, fdb);
+ return 0;
+}
+
+/* Remove neighbor entry with RTM_DELNEIGH */
+int br_fdb_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+ struct net *net = sock_net(skb->sk);
+ struct ndmsg *ndm;
+ struct net_bridge_port *p;
+ struct nlattr *llattr;
+ const __u8 *addr;
+ struct net_device *dev;
+ int err;
+
+ ASSERT_RTNL();
+ if (nlmsg_len(nlh) < sizeof(*ndm))
+ return -EINVAL;
+
+ ndm = nlmsg_data(nlh);
+ if (ndm->ndm_ifindex == 0) {
+ pr_info("bridge: RTM_DELNEIGH with invalid ifindex\n");
+ return -EINVAL;
+ }
+
+ dev = __dev_get_by_index(net, ndm->ndm_ifindex);
+ if (dev == NULL) {
+ pr_info("bridge: RTM_DELNEIGH with unknown ifindex\n");
+ return -ENODEV;
+ }
+
+ llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR);
+ if (llattr == NULL || nla_len(llattr) != ETH_ALEN) {
+ pr_info("bridge: RTM_DELNEIGH with invalid address\n");
+ return -EINVAL;
+ }
+
+ addr = nla_data(llattr);
+
+ p = br_port_get_rtnl(dev);
+ if (p == NULL) {
+ pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n",
+ dev->name);
+ return -EINVAL;
+ }
+
+ spin_lock_bh(&p->br->hash_lock);
+ err = fdb_delete_by_addr(p, addr);
+ spin_unlock_bh(&p->br->hash_lock);
+
+ return err;
+}
+
+
+extern void tcpdumpin_sq(struct sk_buff *skb);
+
+//²Î¿¼br_dev_xmit£¬ÊµÏÖ¿ìËÙת·¢£¬Î´¹Ø×¢fdbÖеÄÁÙʱ״̬,ÁíÍ⣬ÐèҪȷ±£skb->mac_header±»ÓÐЧ¸³Öµ£¬·ñÔòÎÞ·¨»ñÈ¡µ½MACµØÖ·
+//ĿǰδʹÓÃÇý¶¯µ½Çý¶¯µÄ×îÓÅת·¢£¬Ó¦¸ÃûÓÐÎÊÌ⣬ºóÐøÒ»µ©Ê¹Óã¬ÐèÒªÔÚtry_fastnat_for_macdataÀà½Ó¿ÚÖÐÌí¼Óskb_reset_mac_headerÀ´½â¾ö
+int fast_br(struct sk_buff *skb)
+{
+ const unsigned char *dest = NULL;
+ struct hlist_head *head;
+ struct net_bridge_fdb_entry *fdb;
+ struct net_bridge_port *p;
+ struct net_bridge *br;
+
+ if(!skb->dev)
+ {
+ //print_sun(SUN_DBG, "fast_br skb->dev err skb->dev = %x\n", skb->dev);
+ return 0;
+ }
+
+ if(skb->mac_header == 0 || skb->mac_header == ~0U)
+ {
+ //panic("driver not set macheader !!!\n"); for xlat
+ return 0;
+ }
+
+ dest = eth_hdr(skb)->h_dest;
+
+ //²ÎÕÕbr_del_if½Ó¿Ú£¬È·±£Èë¿ÚdevÊÇÇŵ㣬ÒÔ·ÀÖ¹wan1µÈÍâÍø¿Úµ±Çŵã½øÐд¦Àí
+ p = br_port_get_rtnl(skb->dev);
+ if (p == NULL || p->br == NULL)
+ {
+ //print_sun(SUN_DBG, "fast_br br_port_get_rtnl err p = %x\n", p);
+ return 0;
+ }
+
+ br = p->br;
+ //еÄlinuxÄÚºËÖУ¬ÐèÒª½øÐÐif (br->vlan_enabled) return 0;ÒÔ½â¾övlan×÷ΪÇŵãÎÊÌ⣬»òÕ߶ÏÑÔÒ²¿É
+ head = &br->hash[br_mac_hash(dest)];
+
+ if((fdb = fdb_find_rcu(head, dest)) != NULL)
+ {
+ //ÈôÄ¿µÄMACµØַΪԶ¶Ë£¬·½¿ÉÖ´ÐÐfastbr
+ if((!fdb->is_local) && fdb->dst && fdb->dst->dev &&
+ (((fdb->dst->flags & BR_HAIRPIN_MODE) || skb->dev != fdb->dst->dev) &&fdb->dst->state == BR_STATE_FORWARDING))
+ {
+ // tcpdumpin_sq(skb);
+ fast_tcpdump(skb);
+ skb->dev = fdb->dst->dev;
+ skb->isFastbr = 1;
+ fdb->updated = jiffies;
+ skb->now_location |= FASTBR_SUCC;
+ skb_rest_data_byproto(skb);
+ //´Ë´¦Ó¦¸Ã¿ÉÒÔÖ±½Óµ÷ÓÃdev_queue_xmit½Ó¿Ú£¬ºóÐø¸ð±ò¿É¹Ø×¢ÏÂ
+ br_dev_queue_push_xmit(skb);
+ return 1;
+ }
+
+ //»Ø»·µÄÊý¾ÝÖ±½Ó¶ªÆú
+ if((!fdb->is_local) && fdb->dst && fdb->dst->dev &&
+ (skb->dev == fdb->dst->dev) && fdb->dst->state == BR_STATE_FORWARDING)
+ {
+ skbinfo_add(NULL,SKB_LOOP);
+ //print_sun(SUN_ERR,"fast_br loop data discarded, dev:%s \n", skb->dev->name);
+ kfree_skb(skb);
+ return 1;
+ }
+ }
+ //print_sun(SUN_DBG, "fast_br fdb_find_rcu err fdb = %x \n",fdb);
+ return 0;
+}
+EXPORT_SYMBOL(fast_br);
+
+
+//ÒÔÄ¿µÄMAC×÷ΪƥÅäÌõ¼þ£¬µ±Èë²ÎdevΪbr0ʱ£¬·µ»ØֵΪ¶þ²ãÇŵ㣬·ñÔòÈÔȻΪÈë²Îdev£¬ÕâÑù¿ÉÒÔ´ïµ½ÈÝ´íÄÜÁ¦£»È¡´úfastL2DBFind
+struct net_device *getbrport_bydst(struct net_device *dev,unsigned char *dest)
+{
+ struct hlist_head *head;
+ struct net_bridge_fdb_entry *fdb;
+ struct net_bridge_port *p;
+ struct net_bridge *br;
+
+ //±ØÐëÊÇbr0É豸
+ if (dev == NULL || !(dev->priv_flags & IFF_EBRIDGE))
+ return dev;
+
+ br = netdev_priv(dev);
+ //еÄlinuxÄÚºËÖУ¬ÐèÒª½øÐÐif (br->vlan_enabled) return dev;ÒÔ½â¾övlan×÷ΪÇŵãÎÊÌ⣬»òÕ߶ÏÑÔÒ²¿É
+ head = &br->hash[br_mac_hash(dest)];
+
+ if((fdb = fdb_find_rcu(head, dest)) != NULL)
+ {
+ //ÈôÄ¿µÄMACµØַΪԶ¶Ë£¬·½¿ÉÖ´ÐÐfastbr
+ if((!fdb->is_local) && fdb->dst && fdb->dst->dev &&
+ (fdb->dst->state == BR_STATE_FORWARDING)) //(fdb->dst->flags & BR_HAIRPIN_MODE)
+ {
+ return fdb->dst->dev;
+ }
+ }
+ return dev;
+}
+extern void fast_tcpdump(struct sk_buff *skb);
+extern struct neigh_table arp_tbl;
+extern char default_route_name[IFNAMSIZ];
+char default_br_name[IFNAMSIZ] = {0};
+int fast_fwd_ip4addr_conflict(struct sk_buff *skb)
+{
+ struct iphdr *iph = ip_hdr(skb);
+ __be32 saddr,daddr,wan_ip,br_ip=0,br_bcast=0;
+ struct net_device* in_dev = NULL;
+ struct net_device* out_dev = NULL;
+ struct ethhdr *eth;
+ struct net_bridge_port *p;
+ struct net_bridge *br = NULL;
+ struct net_device *default_route_dev;
+ struct net_device *default_br_dev;
+ struct in_device *ip_ptr;
+
+ if(iph->version != 4 || skb->indev == NULL)
+ {
+ return 0;
+ }
+ default_route_dev = dev_get_by_name(&init_net, default_route_name);
+ if(default_route_dev == NULL)
+ {
+ return 0;
+ }
+ ip_ptr = __in_dev_get_rtnl(default_route_dev);
+ if(ip_ptr && ip_ptr->ifa_list)
+ {
+ wan_ip = ip_ptr->ifa_list->ifa_local;
+ }
+ else
+ {
+ default_br_name[0] = 0;
+ dev_put(default_route_dev);
+ return 0;
+ }
+ in_dev = skb->indev;
+ saddr = iph->saddr;
+ daddr = iph->daddr;
+ p = br_port_get_rtnl(in_dev);
+ if (p != NULL)
+ {
+ br = p->br;
+ if (br && br->dev && strncmp(br->dev->name, default_br_name, IFNAMSIZ-1))
+ {
+ strncpy(default_br_name, br->dev->name, IFNAMSIZ-1);
+ }
+ }
+ default_br_dev = dev_get_by_name(&init_net, default_br_name);
+ if(default_br_dev)
+ {
+ ip_ptr = __in_dev_get_rtnl(default_br_dev);
+ if(ip_ptr && ip_ptr->ifa_list)
+ {
+ br_ip = ip_ptr->ifa_list->ifa_local;
+ br_bcast = ip_ptr->ifa_list->ifa_broadcast;
+ }
+ }
+ else
+ {
+ dev_put(default_route_dev);
+ return 0;
+ }
+ if(br && ((daddr == br_ip) || (daddr == br_bcast) || (daddr == wan_ip)))
+ {
+ //printk("@!@1saddr=%08x,daddr=%08x,br_ip=%08x,br_bcast=%08x,wan_ip=%08x\n",saddr, daddr, br_ip, br_bcast, wan_ip);
+ if (IPPROTO_UDP == iph->protocol)
+ {
+ struct udphdr *udph = (struct udphdr *)(skb->data + iph->ihl * 4);
+ if(udph->source == 0x4300 || udph->source == 0x4400
+ || udph->dest == 0x4300 || udph->dest == 0x4400)
+ {
+ //printk("@!@dhcp packet\n");
+ dev_put(default_route_dev);
+ dev_put(default_br_dev);
+ return 0;
+ }
+ }
+ out_dev = default_route_dev;
+ skb_push(skb, ETH_HLEN);
+ eth = (struct ethhdr*)(skb->data);
+ memcpy(eth->h_source, in_dev->dev_addr, ETH_ALEN);
+ memcpy(eth->h_dest, out_dev->dev_addr, ETH_ALEN);
+ fast_tcpdump(skb);
+ skb->dev = out_dev;
+ }
+ else if(in_dev == default_route_dev && ((saddr == br_ip) || (saddr == br_bcast) || (saddr == wan_ip)))
+ {
+ struct neighbour *neigh = neigh_lookup(&arp_tbl, &daddr, default_br_dev);
+ //printk("@!@2saddr=%08x,daddr=%08x,neigh=%08x,wan_ip=%08x\n",saddr, daddr, neigh, wan_ip);
+ if(neigh)
+ {
+ //printk("@!@neigh=%s\n",neigh->dev->name);
+ out_dev = getbrport_bydst(default_br_dev,neigh->ha);
+ if(out_dev)
+ {
+ //printk("@!@out_dev=%s\n",out_dev->name);
+ skb_push(skb, ETH_HLEN);
+ eth = (struct ethhdr*)(skb->data);
+ memcpy(eth->h_source, out_dev->dev_addr, ETH_ALEN);
+ memcpy(eth->h_dest, neigh->ha, ETH_ALEN);
+ //printk("@!@mac=%02x %02x %02x %02x %02x %02x\n",eth->h_dest[0],eth->h_dest[1],eth->h_dest[2],eth->h_dest[3],eth->h_dest[4],eth->h_dest[5]);
+ }
+ neigh_release(neigh);
+ }
+ if(out_dev == NULL)
+ {
+ printk("@!@dev: br port not found\n");
+ dev_put(default_route_dev);
+ dev_put(default_br_dev);
+ return 0;
+ }
+ fast_tcpdump(skb);
+ skb->dev = out_dev;
+ }
+ else
+ {
+ dev_put(default_route_dev);
+ dev_put(default_br_dev);
+ return 0;
+ }
+
+ eth->h_proto = htons(ETH_P_IP);
+ skb->now_location |= FASTNAT_SUCC;
+ dev_queue_xmit(skb);
+
+ dev_put(default_route_dev);
+ dev_put(default_br_dev);
+ return 1;
+}
+
+int fast_for_multicast(struct sk_buff *skb)
+{
+ if (skb->indev && !strncmp(skb->indev->name, default_route_name, IFNAMSIZ-1))
+ {
+ struct net_device* dev = NULL;
+ struct net_bridge *br;
+ struct net_bridge_port *p;
+
+ dev = dev_get_by_name(&init_net, default_br_name);
+ if (dev == NULL || !(dev->priv_flags & IFF_EBRIDGE))
+ {
+ printk("@!@dev: br not found\n");
+ if(dev != NULL)
+ {
+ dev_put(dev);
+ }
+ return 0;
+ }
+ br = (struct net_bridge *)netdev_priv(dev);
+ p = br_get_port(br, 1);
+ if(p && p->dev)
+ {
+ struct ethhdr *eth;
+ struct iphdr *iph = ip_hdr(skb);
+
+ skb_push(skb, ETH_HLEN);
+ eth = (struct ethhdr *)skb->data;
+ memcpy(eth->h_source, p->dev->dev_addr, ETH_ALEN);
+ ip_eth_mc_map(iph->daddr, eth->h_dest);
+ eth->h_proto = htons(ETH_P_IP);
+ skb->dev = p->dev;
+ skb->now_location |= FASTNAT_SUCC;
+ dev_queue_xmit(skb);
+ dev_put(dev);
+ return 1;
+ }
+ dev_put(dev);
+ }
+ return 0;
+}
+