-/* linux/net/inet/arp.c
+/* linux/net/ipv4/arp.c
*
* Version: $Id: arp.c,v 1.99 2001/08/30 22:55:42 davem Exp $
*
* 2 of the License, or (at your option) any later version.
*
* Fixes:
- * Alan Cox : Removed the Ethernet assumptions in
+ * Alan Cox : Removed the Ethernet assumptions in
* Florian's code
- * Alan Cox : Fixed some small errors in the ARP
+ * Alan Cox : Fixed some small errors in the ARP
* logic
* Alan Cox : Allow >4K in /proc
* Alan Cox : Make ARP add its own protocol entry
* Jonathan Naylor : Only lookup the hardware address for
* the correct hardware type.
* Germano Caronni : Assorted subtle races.
- * Craig Schlenter : Don't modify permanent entry
+ * Craig Schlenter : Don't modify permanent entry
* during arp_rcv.
* Russ Nelson : Tidied up a few bits.
* Alexey Kuznetsov: Major changes to caching and behaviour,
- * eg intelligent arp probing and
+ * eg intelligent arp probing and
* generation
* of host down events.
* Alan Cox : Missing unlock in device events.
* Eckes : ARP ioctl control errors.
* Alexey Kuznetsov: Arp free fix.
* Manuel Rodriguez: Gratuitous ARP.
- * Jonathan Layes : Added arpd support through kerneld
+ * Jonathan Layes : Added arpd support through kerneld
* message queue (960314)
* Mike Shaver : /proc/sys/net/ipv4/arp_* support
* Mike McLagan : Routing by source
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
-#include <linux/sched.h>
#include <linux/capability.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/sysctl.h>
#endif
+#include <net/net_namespace.h>
#include <net/ip.h>
#include <net/icmp.h>
#include <net/route.h>
#include <net/tcp.h>
#include <net/sock.h>
#include <net/arp.h>
-#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
#include <net/ax25.h>
-#if defined(CONFIG_NETROM) || defined(CONFIG_NETROM_MODULE)
#include <net/netrom.h>
-#endif
-#endif
#if defined(CONFIG_ATM_CLIP) || defined(CONFIG_ATM_CLIP_MODULE)
#include <net/atmclip.h>
struct neigh_table *clip_tbl_hook;
.gc_thresh3 = 1024,
};
-int arp_mc_map(u32 addr, u8 *haddr, struct net_device *dev, int dir)
+int arp_mc_map(__be32 addr, u8 *haddr, struct net_device *dev, int dir)
{
switch (dev->type) {
case ARPHRD_ETHER:
case ARPHRD_FDDI:
case ARPHRD_IEEE802:
ip_eth_mc_map(addr, haddr);
- return 0;
+ return 0;
case ARPHRD_IEEE802_TR:
ip_tr_mc_map(addr, haddr);
return 0;
case ARPHRD_INFINIBAND:
- ip_ib_mc_map(addr, haddr);
+ ip_ib_mc_map(addr, dev->broadcast, haddr);
return 0;
default:
if (dir) {
neigh->parms = neigh_parms_clone(parms);
rcu_read_unlock();
- if (dev->hard_header == NULL) {
+ if (!dev->header_ops) {
neigh->nud_state = NUD_NOARP;
neigh->ops = &arp_direct_ops;
neigh->output = neigh->ops->queue_xmit;
switch (dev->type) {
default:
break;
- case ARPHRD_ROSE:
+ case ARPHRD_ROSE:
#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
case ARPHRD_AX25:
#if defined(CONFIG_NETROM) || defined(CONFIG_NETROM_MODULE)
neigh->nud_state = NUD_NOARP;
memcpy(neigh->ha, dev->broadcast, dev->addr_len);
}
- if (dev->hard_header_cache)
+
+ if (dev->header_ops->cache)
neigh->ops = &arp_hh_ops;
else
neigh->ops = &arp_generic_ops;
+
if (neigh->nud_state&NUD_VALID)
neigh->output = neigh->ops->connected_output;
else
switch (IN_DEV_ARP_ANNOUNCE(in_dev)) {
default:
case 0: /* By default announce any local IP */
- if (skb && inet_addr_type(skb->nh.iph->saddr) == RTN_LOCAL)
- saddr = skb->nh.iph->saddr;
+ if (skb && inet_addr_type(ip_hdr(skb)->saddr) == RTN_LOCAL)
+ saddr = ip_hdr(skb)->saddr;
break;
case 1: /* Restrict announcements of saddr in same subnet */
if (!skb)
break;
- saddr = skb->nh.iph->saddr;
+ saddr = ip_hdr(skb)->saddr;
if (inet_addr_type(saddr) == RTN_LOCAL) {
/* saddr should be known to target */
if (inet_addr_onlink(in_dev, target, saddr))
}
static int arp_ignore(struct in_device *in_dev, struct net_device *dev,
- u32 sip, u32 tip)
+ __be32 sip, __be32 tip)
{
int scope;
return !inet_confirm_addr(dev, sip, tip, scope);
}
-static int arp_filter(__u32 sip, __u32 tip, struct net_device *dev)
+static int arp_filter(__be32 sip, __be32 tip, struct net_device *dev)
{
struct flowi fl = { .nl_u = { .ip4_u = { .daddr = sip,
.saddr = tip } } };
struct rtable *rt;
- int flag = 0;
+ int flag = 0;
/*unsigned long now; */
- if (ip_route_output_key(&rt, &fl) < 0)
+ if (ip_route_output_key(&rt, &fl) < 0)
return 1;
- if (rt->u.dst.dev != dev) {
+ if (rt->u.dst.dev != dev) {
NET_INC_STATS_BH(LINUX_MIB_ARPFILTER);
flag = 1;
- }
- ip_rt_put(rt);
- return flag;
-}
+ }
+ ip_rt_put(rt);
+ return flag;
+}
/* OBSOLETE FUNCTIONS */
* is allowed to use this function, it is scheduled to be removed. --ANK
*/
-static int arp_set_predefined(int addr_hint, unsigned char * haddr, u32 paddr, struct net_device * dev)
+static int arp_set_predefined(int addr_hint, unsigned char * haddr, __be32 paddr, struct net_device * dev)
{
switch (addr_hint) {
case RTN_LOCAL:
n->used = jiffies;
if (n->nud_state&NUD_VALID || neigh_event_send(n, skb) == 0) {
read_lock_bh(&n->lock);
- memcpy(haddr, n->ha, dev->addr_len);
+ memcpy(haddr, n->ha, dev->addr_len);
read_unlock_bh(&n->lock);
neigh_release(n);
return 0;
if (dev == NULL)
return -EINVAL;
if (n == NULL) {
- u32 nexthop = ((struct rtable*)dst)->rt_gateway;
+ __be32 nexthop = ((struct rtable*)dst)->rt_gateway;
if (dev->flags&(IFF_LOOPBACK|IFF_POINTOPOINT))
nexthop = 0;
n = __neigh_lookup_errno(
* Create an arp packet. If (dest_hw == NULL), we create a broadcast
* message.
*/
-struct sk_buff *arp_create(int type, int ptype, u32 dest_ip,
- struct net_device *dev, u32 src_ip,
+struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip,
+ struct net_device *dev, __be32 src_ip,
unsigned char *dest_hw, unsigned char *src_hw,
unsigned char *target_hw)
{
/*
* Allocate a buffer
*/
-
+
skb = alloc_skb(sizeof(struct arphdr)+ 2*(dev->addr_len+4)
+ LL_RESERVED_SPACE(dev), GFP_ATOMIC);
if (skb == NULL)
return NULL;
skb_reserve(skb, LL_RESERVED_SPACE(dev));
- skb->nh.raw = skb->data;
+ skb_reset_network_header(skb);
arp = (struct arphdr *) skb_put(skb,sizeof(struct arphdr) + 2*(dev->addr_len+4));
skb->dev = dev;
skb->protocol = htons(ETH_P_ARP);
/*
* Fill the device header for the ARP frame
*/
- if (dev->hard_header &&
- dev->hard_header(skb,dev,ptype,dest_hw,src_hw,skb->len) < 0)
+ if (dev_hard_header(skb, dev, ptype, dest_hw, src_hw, skb->len) < 0)
goto out;
/*
/*
* Create and send an arp packet.
*/
-void arp_send(int type, int ptype, u32 dest_ip,
- struct net_device *dev, u32 src_ip,
+void arp_send(int type, int ptype, __be32 dest_ip,
+ struct net_device *dev, __be32 src_ip,
unsigned char *dest_hw, unsigned char *src_hw,
unsigned char *target_hw)
{
/*
* No arp on this interface.
*/
-
+
if (dev->flags&IFF_NOARP)
return;
struct arphdr *arp;
unsigned char *arp_ptr;
struct rtable *rt;
- unsigned char *sha, *tha;
+ unsigned char *sha;
__be32 sip, tip;
u16 dev_type = dev->type;
int addr_type;
if (in_dev == NULL)
goto out;
- arp = skb->nh.arph;
+ arp = arp_hdr(skb);
switch (dev_type) {
- default:
+ default:
if (arp->ar_pro != htons(ETH_P_IP) ||
htons(dev_type) != arp->ar_hrd)
goto out;
break;
-#ifdef CONFIG_NET_ETHERNET
case ARPHRD_ETHER:
-#endif
-#ifdef CONFIG_TR
case ARPHRD_IEEE802_TR:
-#endif
-#ifdef CONFIG_FDDI
case ARPHRD_FDDI:
-#endif
-#ifdef CONFIG_NET_FC
case ARPHRD_IEEE802:
-#endif
-#if defined(CONFIG_NET_ETHERNET) || defined(CONFIG_TR) || \
- defined(CONFIG_FDDI) || defined(CONFIG_NET_FC)
/*
* ETHERNET, Token Ring and Fibre Channel (which are IEEE 802
* devices, according to RFC 2625) devices will accept ARP
arp->ar_pro != htons(ETH_P_IP))
goto out;
break;
-#endif
-#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
case ARPHRD_AX25:
if (arp->ar_pro != htons(AX25_P_IP) ||
arp->ar_hrd != htons(ARPHRD_AX25))
goto out;
break;
-#if defined(CONFIG_NETROM) || defined(CONFIG_NETROM_MODULE)
case ARPHRD_NETROM:
if (arp->ar_pro != htons(AX25_P_IP) ||
arp->ar_hrd != htons(ARPHRD_NETROM))
goto out;
break;
-#endif
-#endif
}
/* Understand only these message types */
arp_ptr += dev->addr_len;
memcpy(&sip, arp_ptr, 4);
arp_ptr += 4;
- tha = arp_ptr;
arp_ptr += dev->addr_len;
memcpy(&tip, arp_ptr, 4);
-/*
+/*
* Check for bad requests for 127.x.x.x and requests for multicast
* addresses. If this is one such, delete it.
*/
* Process entry. The idea here is we want to send a reply if it is a
* request for us or if it is a request for someone else that we hold
* a proxy for. We want to add an entry to our cache if it is a reply
- * to us or if it is a request for our address.
- * (The assumption for this last is that if someone is requesting our
- * address, they are probably intending to talk to us, so it saves time
- * if we cache their address. Their address is also probably not in
+ * to us or if it is a request for our address.
+ * (The assumption for this last is that if someone is requesting our
+ * address, they are probably intending to talk to us, so it saves time
+ * if we cache their address. Their address is also probably not in
* our cache, since ours is not in their cache.)
- *
+ *
* Putting this another way, we only care about replies if they are to
* us, in which case we add them to the cache. For requests, we care
* about those for us and those for our proxies. We reply to both,
- * and in the case of requests for us we add the requester to the arp
+ * and in the case of requests for us we add the requester to the arp
* cache.
*/
if (arp->ar_op == htons(ARPOP_REQUEST) &&
inet_addr_type(tip) == RTN_LOCAL &&
!arp_ignore(in_dev,dev,sip,tip))
- arp_send(ARPOP_REPLY,ETH_P_ARP,tip,dev,tip,sha,dev->dev_addr,dev->dev_addr);
+ arp_send(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
+ dev->dev_addr, sha);
goto out;
}
if (!dont_send)
dont_send |= arp_ignore(in_dev,dev,sip,tip);
if (!dont_send && IN_DEV_ARPFILTER(in_dev))
- dont_send |= arp_filter(sip,tip,dev);
+ dont_send |= arp_filter(sip,tip,dev);
if (!dont_send)
arp_send(ARPOP_REPLY,ETH_P_ARP,sip,dev,tip,sha,dev->dev_addr,sha);
if (n)
neigh_release(n);
- if (NEIGH_CB(skb)->flags & LOCALLY_ENQUEUED ||
+ if (NEIGH_CB(skb)->flags & LOCALLY_ENQUEUED ||
skb->pkt_type == PACKET_HOST ||
in_dev->arp_parms->proxy_delay == 0) {
arp_send(ARPOP_REPLY,ETH_P_ARP,sip,dev,tip,sha,dev->dev_addr,sha);
n = __neigh_lookup(&arp_tbl, &sip, dev, 0);
- if (ipv4_devconf.arp_accept) {
+ if (IPV4_DEVCONF_ALL(ARP_ACCEPT)) {
/* Unsolicited ARP is not accepted by default.
It is possible, that this option should be enabled for some
devices (strip is candidate)
if (n == NULL &&
arp->ar_op == htons(ARPOP_REPLY) &&
inet_addr_type(sip) == RTN_UNICAST)
- n = __neigh_lookup(&arp_tbl, &sip, dev, -1);
+ n = __neigh_lookup(&arp_tbl, &sip, dev, 1);
}
if (n) {
{
struct arphdr *arp;
+ if (dev->nd_net != &init_net)
+ goto freeskb;
+
/* ARP header, plus 2 device addresses, plus 2 IP addresses. */
if (!pskb_may_pull(skb, (sizeof(struct arphdr) +
(2 * dev->addr_len) +
(2 * sizeof(u32)))))
goto freeskb;
- arp = skb->nh.arph;
+ arp = arp_hdr(skb);
if (arp->ar_hln != dev->addr_len ||
dev->flags & IFF_NOARP ||
skb->pkt_type == PACKET_OTHERHOST ||
static int arp_req_set(struct arpreq *r, struct net_device * dev)
{
- u32 ip = ((struct sockaddr_in *) &r->arp_pa)->sin_addr.s_addr;
+ __be32 ip = ((struct sockaddr_in *) &r->arp_pa)->sin_addr.s_addr;
struct neighbour *neigh;
int err;
if (r->arp_flags&ATF_PUBL) {
- u32 mask = ((struct sockaddr_in *) &r->arp_netmask)->sin_addr.s_addr;
- if (mask && mask != 0xFFFFFFFF)
+ __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(r->arp_ha.sa_family, r->arp_ha.sa_data);
+ dev = dev_getbyhwaddr(&init_net, r->arp_ha.sa_family, r->arp_ha.sa_data);
if (!dev)
return -ENODEV;
}
return 0;
}
if (dev == NULL) {
- ipv4_devconf.proxy_arp = 1;
+ IPV4_DEVCONF_ALL(PROXY_ARP) = 1;
return 0;
}
if (__in_dev_get_rtnl(dev)) {
- __in_dev_get_rtnl(dev)->cnf.proxy_arp = 1;
+ IN_DEV_CONF_SET(__in_dev_get_rtnl(dev), PROXY_ARP, 1);
return 0;
}
return -ENXIO;
if (r->arp_flags & ATF_PERM)
state = NUD_PERMANENT;
err = neigh_update(neigh, (r->arp_flags&ATF_COM) ?
- r->arp_ha.sa_data : NULL, state,
+ r->arp_ha.sa_data : NULL, state,
NEIGH_UPDATE_F_OVERRIDE|
NEIGH_UPDATE_F_ADMIN);
neigh_release(neigh);
static int arp_req_get(struct arpreq *r, struct net_device *dev)
{
- u32 ip = ((struct sockaddr_in *) &r->arp_pa)->sin_addr.s_addr;
+ __be32 ip = ((struct sockaddr_in *) &r->arp_pa)->sin_addr.s_addr;
struct neighbour *neigh;
int err = -ENXIO;
static int arp_req_delete(struct arpreq *r, struct net_device * dev)
{
int err;
- u32 ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr;
+ __be32 ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr;
struct neighbour *neigh;
if (r->arp_flags & ATF_PUBL) {
- u32 mask =
+ __be32 mask =
((struct sockaddr_in *)&r->arp_netmask)->sin_addr.s_addr;
- if (mask == 0xFFFFFFFF)
+ if (mask == htonl(0xFFFFFFFF))
return pneigh_delete(&arp_tbl, &ip, dev);
if (mask == 0) {
if (dev == NULL) {
- ipv4_devconf.proxy_arp = 0;
+ IPV4_DEVCONF_ALL(PROXY_ARP) = 0;
return 0;
}
if (__in_dev_get_rtnl(dev)) {
- __in_dev_get_rtnl(dev)->cnf.proxy_arp = 0;
+ IN_DEV_CONF_SET(__in_dev_get_rtnl(dev),
+ PROXY_ARP, 0);
return 0;
}
return -ENXIO;
neigh = neigh_lookup(&arp_tbl, &ip, dev);
if (neigh) {
if (neigh->nud_state&~NUD_NOARP)
- err = neigh_update(neigh, NULL, NUD_FAILED,
+ err = neigh_update(neigh, NULL, NUD_FAILED,
NEIGH_UPDATE_F_OVERRIDE|
NEIGH_UPDATE_F_ADMIN);
neigh_release(neigh);
rtnl_lock();
if (r.arp_dev[0]) {
err = -ENODEV;
- if ((dev = __dev_get_by_name(r.arp_dev)) == NULL)
+ if ((dev = __dev_get_by_name(&init_net, r.arp_dev)) == NULL)
goto out;
/* Mmmm... It is wrong... ARPHRD_NETROM==0 */
goto out;
}
- switch(cmd) {
+ switch (cmd) {
case SIOCDARP:
- err = arp_req_delete(&r, dev);
+ err = arp_req_delete(&r, dev);
break;
case SIOCSARP:
err = arp_req_set(&r, dev);
{
struct net_device *dev = ptr;
+ if (dev->nd_net != &init_net)
+ return NOTIFY_DONE;
+
switch (event) {
case NETDEV_CHANGEADDR:
neigh_changeaddr(&arp_tbl, dev);
if (c != ' ') *s++ = c;
}
-
+
*s++ = '-';
if ((n = ((a->ax25_call[6] >> 1) & 0x0F)) > 9) {
*s++ = '1';
n -= 10;
}
-
+
*s++ = n + '0';
*s++ = '\0';
/* ------------------------------------------------------------------------ */
-static struct seq_operations arp_seq_ops = {
+static const struct seq_operations arp_seq_ops = {
.start = arp_seq_start,
.next = neigh_seq_next,
.stop = neigh_seq_stop,
static int arp_seq_open(struct inode *inode, struct file *file)
{
- struct seq_file *seq;
- int rc = -ENOMEM;
- struct neigh_seq_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
-
- if (!s)
- goto out;
-
- rc = seq_open(file, &arp_seq_ops);
- if (rc)
- goto out_kfree;
-
- seq = file->private_data;
- seq->private = s;
-out:
- return rc;
-out_kfree:
- kfree(s);
- goto out;
+ return seq_open_private(file, &arp_seq_ops,
+ sizeof(struct neigh_seq_state));
}
-static struct file_operations arp_seq_fops = {
+static const struct file_operations arp_seq_fops = {
.owner = THIS_MODULE,
.open = arp_seq_open,
.read = seq_read,
static int __init arp_proc_init(void)
{
- if (!proc_net_fops_create("arp", S_IRUGO, &arp_seq_fops))
+ if (!proc_net_fops_create(&init_net, "arp", S_IRUGO, &arp_seq_fops))
return -ENOMEM;
return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff