diff options
Diffstat (limited to 'net/ipv4/arp.c')
| -rw-r--r-- | net/ipv4/arp.c | 53 |
1 files changed, 31 insertions, 22 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index 7808093cede6..1a9b99e04465 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -166,18 +166,20 @@ struct neigh_table arp_tbl = { .id = "arp_cache", .parms = { .tbl = &arp_tbl, - .base_reachable_time = 30 * HZ, - .retrans_time = 1 * HZ, - .gc_staletime = 60 * HZ, .reachable_time = 30 * HZ, - .delay_probe_time = 5 * HZ, - .queue_len_bytes = 64*1024, - .ucast_probes = 3, - .mcast_probes = 3, - .anycast_delay = 1 * HZ, - .proxy_delay = (8 * HZ) / 10, - .proxy_qlen = 64, - .locktime = 1 * HZ, + .data = { + [NEIGH_VAR_MCAST_PROBES] = 3, + [NEIGH_VAR_UCAST_PROBES] = 3, + [NEIGH_VAR_RETRANS_TIME] = 1 * HZ, + [NEIGH_VAR_BASE_REACHABLE_TIME] = 30 * HZ, + [NEIGH_VAR_DELAY_PROBE_TIME] = 5 * HZ, + [NEIGH_VAR_GC_STALETIME] = 60 * HZ, + [NEIGH_VAR_QUEUE_LEN_BYTES] = 64 * 1024, + [NEIGH_VAR_PROXY_QLEN] = 64, + [NEIGH_VAR_ANYCAST_DELAY] = 1 * HZ, + [NEIGH_VAR_PROXY_DELAY] = (8 * HZ) / 10, + [NEIGH_VAR_LOCKTIME] = 1 * HZ, + }, }, .gc_interval = 30 * HZ, .gc_thresh1 = 128, @@ -359,14 +361,14 @@ static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb) if (!saddr) saddr = inet_select_addr(dev, target, RT_SCOPE_LINK); - probes -= neigh->parms->ucast_probes; + probes -= NEIGH_VAR(neigh->parms, UCAST_PROBES); if (probes < 0) { if (!(neigh->nud_state & NUD_VALID)) pr_debug("trying to ucast probe in NUD_INVALID\n"); neigh_ha_snapshot(dst_ha, neigh, dev); dst_hw = dst_ha; } else { - probes -= neigh->parms->app_probes; + probes -= NEIGH_VAR(neigh->parms, APP_PROBES); if (probes < 0) { neigh_app_ns(neigh); return; @@ -379,6 +381,7 @@ static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb) static int arp_ignore(struct in_device *in_dev, __be32 sip, __be32 tip) { + struct net *net = dev_net(in_dev->dev); int scope; switch (IN_DEV_ARP_IGNORE(in_dev)) { @@ -397,6 +400,7 @@ static int arp_ignore(struct in_device *in_dev, __be32 sip, __be32 tip) case 3: /* Do not reply for scope host addresses */ sip = 0; scope = RT_SCOPE_LINK; + in_dev = NULL; break; case 4: /* Reserved */ case 5: @@ -408,7 +412,7 @@ static int arp_ignore(struct in_device *in_dev, __be32 sip, __be32 tip) default: return 0; } - return !inet_confirm_addr(in_dev, sip, tip, scope); + return !inet_confirm_addr(net, in_dev, sip, tip, scope); } static int arp_filter(__be32 sip, __be32 tip, struct net_device *dev) @@ -728,6 +732,7 @@ static int arp_process(struct sk_buff *skb) int addr_type; struct neighbour *n; struct net *net = dev_net(dev); + bool is_garp = false; /* arp_rcv below verifies the ARP header and verifies the device * is ARP'able. @@ -871,7 +876,7 @@ static int arp_process(struct sk_buff *skb) if (NEIGH_CB(skb)->flags & LOCALLY_ENQUEUED || skb->pkt_type == PACKET_HOST || - in_dev->arp_parms->proxy_delay == 0) { + NEIGH_VAR(in_dev->arp_parms, PROXY_DELAY) == 0) { arp_send(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, dev->dev_addr, sha); @@ -894,10 +899,12 @@ static int arp_process(struct sk_buff *skb) It is possible, that this option should be enabled for some devices (strip is candidate) */ + is_garp = arp->ar_op == htons(ARPOP_REQUEST) && tip == sip && + inet_addr_type(net, sip) == RTN_UNICAST; + if (n == NULL && - (arp->ar_op == htons(ARPOP_REPLY) || - (arp->ar_op == htons(ARPOP_REQUEST) && tip == sip)) && - inet_addr_type(net, sip) == RTN_UNICAST) + ((arp->ar_op == htons(ARPOP_REPLY) && + inet_addr_type(net, sip) == RTN_UNICAST) || is_garp)) n = __neigh_lookup(&arp_tbl, &sip, dev, 1); } @@ -910,7 +917,10 @@ static int arp_process(struct sk_buff *skb) agents are active. Taking the first reply prevents arp trashing and chooses the fastest router. */ - override = time_after(jiffies, n->updated + n->parms->locktime); + override = time_after(jiffies, + n->updated + + NEIGH_VAR(n->parms, LOCKTIME)) || + is_garp; /* Broadcast replies and request packets do not assert neighbour reachability. @@ -1107,7 +1117,7 @@ static int arp_req_get(struct arpreq *r, struct net_device *dev) return err; } -int arp_invalidate(struct net_device *dev, __be32 ip) +static int arp_invalidate(struct net_device *dev, __be32 ip) { struct neighbour *neigh = neigh_lookup(&arp_tbl, &ip, dev); int err = -ENXIO; @@ -1122,7 +1132,6 @@ int arp_invalidate(struct net_device *dev, __be32 ip) return err; } -EXPORT_SYMBOL(arp_invalidate); static int arp_req_delete_public(struct net *net, struct arpreq *r, struct net_device *dev) @@ -1284,7 +1293,7 @@ void __init arp_init(void) dev_add_pack(&arp_packet_type); arp_proc_init(); #ifdef CONFIG_SYSCTL - neigh_sysctl_register(NULL, &arp_tbl.parms, "ipv4", NULL); + neigh_sysctl_register(NULL, &arp_tbl.parms, NULL); #endif register_netdevice_notifier(&arp_netdev_notifier); } |