diff options
| -rw-r--r-- | net/ipv4/arp.c | 58 |
1 files changed, 33 insertions, 25 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index 54a76b8b803a..04e0ecdd07be 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -952,37 +952,45 @@ out_of_mem: * Set (create) an ARP cache entry. */ +static int arp_req_set_public(struct arpreq *r, struct net_device *dev) +{ + __be32 ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr; + __be32 mask = ((struct sockaddr_in *)&r->arp_netmask)->sin_addr.s_addr; + + if (mask && mask != htonl(0xFFFFFFFF)) + return -EINVAL; + if (!dev && (r->arp_flags & ATF_COM)) { + dev = dev_getbyhwaddr(&init_net, r->arp_ha.sa_family, + r->arp_ha.sa_data); + if (!dev) + return -ENODEV; + } + if (mask) { + if (pneigh_lookup(&arp_tbl, &ip, dev, 1) == NULL) + return -ENOBUFS; + return 0; + } + if (dev == NULL) { + IPV4_DEVCONF_ALL(PROXY_ARP) = 1; + return 0; + } + if (__in_dev_get_rtnl(dev)) { + IN_DEV_CONF_SET(__in_dev_get_rtnl(dev), PROXY_ARP, 1); + return 0; + } + return -ENXIO; +} + static int arp_req_set(struct arpreq *r, struct net_device * dev) { - __be32 ip = ((struct sockaddr_in *) &r->arp_pa)->sin_addr.s_addr; + __be32 ip; struct neighbour *neigh; int err; - if (r->arp_flags&ATF_PUBL) { - __be32 mask = ((struct sockaddr_in *) &r->arp_netmask)->sin_addr.s_addr; - if (mask && mask != htonl(0xFFFFFFFF)) - return -EINVAL; - if (!dev && (r->arp_flags & ATF_COM)) { - dev = dev_getbyhwaddr(&init_net, r->arp_ha.sa_family, r->arp_ha.sa_data); - if (!dev) - return -ENODEV; - } - if (mask) { - if (pneigh_lookup(&arp_tbl, &ip, dev, 1) == NULL) - return -ENOBUFS; - return 0; - } - if (dev == NULL) { - IPV4_DEVCONF_ALL(PROXY_ARP) = 1; - return 0; - } - if (__in_dev_get_rtnl(dev)) { - IN_DEV_CONF_SET(__in_dev_get_rtnl(dev), PROXY_ARP, 1); - return 0; - } - return -ENXIO; - } + if (r->arp_flags & ATF_PUBL) + return arp_req_set_public(r, dev); + ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr; if (r->arp_flags & ATF_PERM) r->arp_flags |= ATF_COM; if (dev == NULL) { |