* bonding can change the skb before
* sending (e.g. insert 8021q tag).
* Harald Welte : convert to make use of jenkins hash
+ * Jesper D. Brouer: Proxy ARP PVLAN RFC 3069 support.
*/
#include <linux/module.h>
#include <linux/net.h>
#include <linux/rcupdate.h>
#include <linux/jhash.h>
+#include <linux/slab.h>
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
#endif
static void arp_error_report(struct neighbour *neigh, struct sk_buff *skb);
static void parp_redo(struct sk_buff *skb);
-static struct neigh_ops arp_generic_ops = {
+static const struct neigh_ops arp_generic_ops = {
.family = AF_INET,
.solicit = arp_solicit,
.error_report = arp_error_report,
.queue_xmit = dev_queue_xmit,
};
-static struct neigh_ops arp_hh_ops = {
+static const struct neigh_ops arp_hh_ops = {
.family = AF_INET,
.solicit = arp_solicit,
.error_report = arp_error_report,
.queue_xmit = dev_queue_xmit,
};
-static struct neigh_ops arp_direct_ops = {
+static const struct neigh_ops arp_direct_ops = {
.family = AF_INET,
.output = dev_queue_xmit,
.connected_output = dev_queue_xmit,
.queue_xmit = dev_queue_xmit,
};
-struct neigh_ops arp_broken_ops = {
+const struct neigh_ops arp_broken_ops = {
.family = AF_INET,
.solicit = arp_solicit,
.error_report = arp_error_report,
__be32 paddr;
struct neighbour *n;
- if (!skb->dst) {
+ if (!skb_dst(skb)) {
printk(KERN_DEBUG "arp_find is called with dst==NULL\n");
kfree_skb(skb);
return 1;
}
- paddr = skb->rtable->rt_gateway;
+ paddr = skb_rtable(skb)->rt_gateway;
if (arp_set_predefined(inet_addr_type(dev_net(dev), paddr), haddr, paddr, dev))
return 0;
/*
* Check if we can use proxy ARP for this path
*/
-
-static inline int arp_fwd_proxy(struct in_device *in_dev, struct rtable *rt)
+static inline int arp_fwd_proxy(struct in_device *in_dev,
+ struct net_device *dev, struct rtable *rt)
{
struct in_device *out_dev;
int imi, omi = -1;
+ if (rt->u.dst.dev == dev)
+ return 0;
+
if (!IN_DEV_PROXY_ARP(in_dev))
return 0;
}
/*
+ * Check for RFC3069 proxy arp private VLAN (allow to send back to same dev)
+ *
+ * RFC3069 supports proxy arp replies back to the same interface. This
+ * is done to support (ethernet) switch features, like RFC 3069, where
+ * the individual ports are not allowed to communicate with each
+ * other, BUT they are allowed to talk to the upstream router. As
+ * described in RFC 3069, it is possible to allow these hosts to
+ * communicate through the upstream router, by proxy_arp'ing.
+ *
+ * RFC 3069: "VLAN Aggregation for Efficient IP Address Allocation"
+ *
+ * This technology is known by different names:
+ * In RFC 3069 it is called VLAN Aggregation.
+ * Cisco and Allied Telesyn call it Private VLAN.
+ * Hewlett-Packard call it Source-Port filtering or port-isolation.
+ * Ericsson call it MAC-Forced Forwarding (RFC Draft).
+ *
+ */
+static inline int arp_fwd_pvlan(struct in_device *in_dev,
+ struct net_device *dev, struct rtable *rt,
+ __be32 sip, __be32 tip)
+{
+ /* Private VLAN is only concerned about the same ethernet segment */
+ if (rt->u.dst.dev != dev)
+ return 0;
+
+ /* Don't reply on self probes (often done by windowz boxes)*/
+ if (sip == tip)
+ return 0;
+
+ if (IN_DEV_PROXY_ARP_PVLAN(in_dev))
+ return 1;
+ else
+ return 0;
+}
+
+/*
* Interface to link layer: send routine and receive handler.
*/
#endif
#endif
-#ifdef CONFIG_FDDI
+#if defined(CONFIG_FDDI) || defined(CONFIG_FDDI_MODULE)
case ARPHRD_FDDI:
arp->ar_hrd = htons(ARPHRD_ETHER);
arp->ar_pro = htons(ETH_P_IP);
break;
#endif
-#ifdef CONFIG_TR
+#if defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
case ARPHRD_IEEE802_TR:
arp->ar_hrd = htons(ARPHRD_IEEE802);
arp->ar_pro = htons(ETH_P_IP);
}
if (arp->ar_op == htons(ARPOP_REQUEST) &&
- ip_route_input(skb, tip, sip, 0, dev) == 0) {
+ ip_route_input_noref(skb, tip, sip, 0, dev) == 0) {
- rt = skb->rtable;
+ rt = skb_rtable(skb);
addr_type = rt->rt_type;
if (addr_type == RTN_LOCAL) {
}
goto out;
} else if (IN_DEV_FORWARD(in_dev)) {
- if (addr_type == RTN_UNICAST && rt->u.dst.dev != dev &&
- (arp_fwd_proxy(in_dev, rt) || pneigh_lookup(&arp_tbl, net, &tip, dev, 0))) {
+ if (addr_type == RTN_UNICAST &&
+ (arp_fwd_proxy(in_dev, dev, rt) ||
+ arp_fwd_pvlan(in_dev, dev, rt, sip, tip) ||
+ pneigh_lookup(&arp_tbl, net, &tip, dev, 0)))
+ {
n = neigh_event_ns(&arp_tbl, sha, &sip, dev);
if (n)
neigh_release(n);
devices (strip is candidate)
*/
if (n == NULL &&
- arp->ar_op == htons(ARPOP_REPLY) &&
+ (arp->ar_op == htons(ARPOP_REPLY) ||
+ (arp->ar_op == htons(ARPOP_REQUEST) && tip == sip)) &&
inet_addr_type(net, sip) == RTN_UNICAST)
n = __neigh_lookup(&arp_tbl, &sip, dev, 1);
}
return -EINVAL;
}
switch (dev->type) {
-#ifdef CONFIG_FDDI
+#if defined(CONFIG_FDDI) || defined(CONFIG_FDDI_MODULE)
case ARPHRD_FDDI:
/*
* According to RFC 1390, FDDI devices should accept ARP
dev_add_pack(&arp_packet_type);
arp_proc_init();
#ifdef CONFIG_SYSCTL
- neigh_sysctl_register(NULL, &arp_tbl.parms, NET_IPV4,
- NET_IPV4_NEIGH, "ipv4", NULL, NULL);
+ neigh_sysctl_register(NULL, &arp_tbl.parms, "ipv4", NULL);
#endif
register_netdevice_notifier(&arp_netdev_notifier);
}
hbuffer[k++] = hex_asc_lo(n->ha[j]);
hbuffer[k++] = ':';
}
- hbuffer[--k] = 0;
+ if (k != 0)
+ --k;
+ hbuffer[k] = 0;
#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
}
#endif
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff