aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--net/ipv4/arp.c58
1 files changed, 33 insertions, 25 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 54a76b8b803..04e0ecdd07b 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) {