net: arp: code cleanup
Clean the code up according to Documentation/CodingStyle. Don't initialize the variable dont_send in arp_process(). Remove the temporary varialbe flags in arp_state_to_flags(). Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
c07b68e841
commit
deffd77759
100
net/ipv4/arp.c
100
net/ipv4/arp.c
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@ -120,7 +120,7 @@ EXPORT_SYMBOL(clip_tbl_hook);
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#endif
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#include <linux/uaccess.h>
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#include <linux/netfilter_arp.h>
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@ -296,8 +296,10 @@ static int arp_constructor(struct neighbour *neigh)
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neigh->ops = &arp_broken_ops;
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neigh->output = neigh->ops->output;
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return 0;
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#else
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break;
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#endif
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;}
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}
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#endif
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if (neigh->type == RTN_MULTICAST) {
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neigh->nud_state = NUD_NOARP;
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@ -305,7 +307,8 @@ static int arp_constructor(struct neighbour *neigh)
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} else if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) {
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neigh->nud_state = NUD_NOARP;
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memcpy(neigh->ha, dev->dev_addr, dev->addr_len);
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} else if (neigh->type == RTN_BROADCAST || dev->flags&IFF_POINTOPOINT) {
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} else if (neigh->type == RTN_BROADCAST ||
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(dev->flags & IFF_POINTOPOINT)) {
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neigh->nud_state = NUD_NOARP;
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memcpy(neigh->ha, dev->broadcast, dev->addr_len);
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}
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@ -347,7 +350,8 @@ static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb)
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switch (IN_DEV_ARP_ANNOUNCE(in_dev)) {
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default:
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case 0: /* By default announce any local IP */
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if (skb && inet_addr_type(dev_net(dev), ip_hdr(skb)->saddr) == RTN_LOCAL)
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if (skb && inet_addr_type(dev_net(dev),
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ip_hdr(skb)->saddr) == RTN_LOCAL)
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saddr = ip_hdr(skb)->saddr;
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break;
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case 1: /* Restrict announcements of saddr in same subnet */
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@ -369,17 +373,22 @@ static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb)
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if (!saddr)
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saddr = inet_select_addr(dev, target, RT_SCOPE_LINK);
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if ((probes -= neigh->parms->ucast_probes) < 0) {
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probes -= neigh->parms->ucast_probes;
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if (probes < 0) {
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if (!(neigh->nud_state & NUD_VALID))
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printk(KERN_DEBUG "trying to ucast probe in NUD_INVALID\n");
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printk(KERN_DEBUG
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"trying to ucast probe in NUD_INVALID\n");
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dst_ha = neigh->ha;
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read_lock_bh(&neigh->lock);
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} else if ((probes -= neigh->parms->app_probes) < 0) {
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} else {
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probes -= neigh->parms->app_probes;
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if (probes < 0) {
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#ifdef CONFIG_ARPD
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neigh_app_ns(neigh);
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#endif
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return;
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}
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}
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arp_send(ARPOP_REQUEST, ETH_P_ARP, target, dev, saddr,
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dst_ha, dev->dev_addr, NULL);
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@ -451,7 +460,8 @@ static int arp_filter(__be32 sip, __be32 tip, struct net_device *dev)
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* is allowed to use this function, it is scheduled to be removed. --ANK
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*/
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static int arp_set_predefined(int addr_hint, unsigned char * haddr, __be32 paddr, struct net_device * dev)
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static int arp_set_predefined(int addr_hint, unsigned char *haddr,
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__be32 paddr, struct net_device *dev)
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{
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switch (addr_hint) {
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case RTN_LOCAL:
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@ -483,7 +493,8 @@ int arp_find(unsigned char *haddr, struct sk_buff *skb)
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paddr = skb_rtable(skb)->rt_gateway;
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if (arp_set_predefined(inet_addr_type(dev_net(dev), paddr), haddr, paddr, dev))
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if (arp_set_predefined(inet_addr_type(dev_net(dev), paddr), haddr,
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paddr, dev))
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return 0;
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n = __neigh_lookup(&arp_tbl, &paddr, dev, 1);
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@ -519,7 +530,8 @@ int arp_bind_neighbour(struct dst_entry *dst)
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nexthop = 0;
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n = __neigh_lookup_errno(
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#if defined(CONFIG_ATM_CLIP) || defined(CONFIG_ATM_CLIP_MODULE)
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dev->type == ARPHRD_ATM ? clip_tbl_hook :
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dev->type == ARPHRD_ATM ?
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clip_tbl_hook :
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#endif
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&arp_tbl, &nexthop, dev);
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if (IS_ERR(n))
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@ -543,8 +555,8 @@ static inline int arp_fwd_proxy(struct in_device *in_dev,
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if (!IN_DEV_PROXY_ARP(in_dev))
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return 0;
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if ((imi = IN_DEV_MEDIUM_ID(in_dev)) == 0)
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imi = IN_DEV_MEDIUM_ID(in_dev);
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if (imi == 0)
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return 1;
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if (imi == -1)
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return 0;
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@ -735,9 +747,8 @@ void arp_send(int type, int ptype, __be32 dest_ip,
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skb = arp_create(type, ptype, dest_ip, dev, src_ip,
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dest_hw, src_hw, target_hw);
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if (skb == NULL) {
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if (skb == NULL)
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return;
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}
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arp_xmit(skb);
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}
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@ -869,16 +880,17 @@ static int arp_process(struct sk_buff *skb)
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addr_type = rt->rt_type;
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if (addr_type == RTN_LOCAL) {
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int dont_send = 0;
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int dont_send;
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if (!dont_send)
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dont_send |= arp_ignore(in_dev,sip,tip);
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dont_send = arp_ignore(in_dev, sip, tip);
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if (!dont_send && IN_DEV_ARPFILTER(in_dev))
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dont_send |= arp_filter(sip, tip, dev);
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if (!dont_send) {
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n = neigh_event_ns(&arp_tbl, sha, &sip, dev);
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if (n) {
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arp_send(ARPOP_REPLY,ETH_P_ARP,sip,dev,tip,sha,dev->dev_addr,sha);
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arp_send(ARPOP_REPLY, ETH_P_ARP, sip,
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dev, tip, sha, dev->dev_addr,
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sha);
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neigh_release(n);
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}
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}
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@ -887,8 +899,7 @@ static int arp_process(struct sk_buff *skb)
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if (addr_type == RTN_UNICAST &&
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(arp_fwd_proxy(in_dev, dev, rt) ||
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arp_fwd_pvlan(in_dev, dev, rt, sip, tip) ||
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pneigh_lookup(&arp_tbl, net, &tip, dev, 0)))
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{
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pneigh_lookup(&arp_tbl, net, &tip, dev, 0))) {
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n = neigh_event_ns(&arp_tbl, sha, &sip, dev);
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if (n)
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neigh_release(n);
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@ -896,9 +907,12 @@ static int arp_process(struct sk_buff *skb)
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if (NEIGH_CB(skb)->flags & LOCALLY_ENQUEUED ||
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skb->pkt_type == PACKET_HOST ||
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in_dev->arp_parms->proxy_delay == 0) {
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arp_send(ARPOP_REPLY,ETH_P_ARP,sip,dev,tip,sha,dev->dev_addr,sha);
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arp_send(ARPOP_REPLY, ETH_P_ARP, sip,
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dev, tip, sha, dev->dev_addr,
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sha);
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} else {
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pneigh_enqueue(&arp_tbl, in_dev->arp_parms, skb);
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pneigh_enqueue(&arp_tbl,
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in_dev->arp_parms, skb);
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return 0;
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}
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goto out;
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@ -939,7 +953,8 @@ static int arp_process(struct sk_buff *skb)
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if (arp->ar_op != htons(ARPOP_REPLY) ||
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skb->pkt_type != PACKET_HOST)
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state = NUD_STALE;
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neigh_update(n, sha, state, override ? NEIGH_UPDATE_F_OVERRIDE : 0);
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neigh_update(n, sha, state,
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override ? NEIGH_UPDATE_F_OVERRIDE : 0);
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neigh_release(n);
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}
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@ -975,7 +990,8 @@ static int arp_rcv(struct sk_buff *skb, struct net_device *dev,
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arp->ar_pln != 4)
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goto freeskb;
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if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
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skb = skb_share_check(skb, GFP_ATOMIC);
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if (skb == NULL)
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goto out_of_mem;
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memset(NEIGH_CB(skb), 0, sizeof(struct neighbour_cb));
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@ -1046,10 +1062,11 @@ static int arp_req_set(struct net *net, struct arpreq *r,
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if (r->arp_flags & ATF_PERM)
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r->arp_flags |= ATF_COM;
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if (dev == NULL) {
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struct flowi fl = { .nl_u = { .ip4_u = { .daddr = ip,
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.tos = RTO_ONLINK } } };
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struct flowi fl = { .nl_u.ip4_u = { .daddr = ip,
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.tos = RTO_ONLINK } };
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struct rtable *rt;
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if ((err = ip_route_output_key(net, &rt, &fl)) != 0)
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err = ip_route_output_key(net, &rt, &fl);
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if (err != 0)
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return err;
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dev = rt->dst.dev;
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ip_rt_put(rt);
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@ -1094,12 +1111,12 @@ static int arp_req_set(struct net *net, struct arpreq *r,
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static unsigned arp_state_to_flags(struct neighbour *neigh)
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{
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unsigned flags = 0;
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if (neigh->nud_state&NUD_PERMANENT)
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flags = ATF_PERM|ATF_COM;
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return ATF_PERM | ATF_COM;
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else if (neigh->nud_state&NUD_VALID)
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flags = ATF_COM;
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return flags;
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return ATF_COM;
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else
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return 0;
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}
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/*
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@ -1153,10 +1170,11 @@ static int arp_req_delete(struct net *net, struct arpreq *r,
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ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr;
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if (dev == NULL) {
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struct flowi fl = { .nl_u = { .ip4_u = { .daddr = ip,
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.tos = RTO_ONLINK } } };
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struct flowi fl = { .nl_u.ip4_u = { .daddr = ip,
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.tos = RTO_ONLINK } };
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struct rtable *rt;
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if ((err = ip_route_output_key(net, &rt, &fl)) != 0)
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err = ip_route_output_key(net, &rt, &fl);
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if (err != 0)
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return err;
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dev = rt->dst.dev;
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ip_rt_put(rt);
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@ -1211,7 +1229,8 @@ int arp_ioctl(struct net *net, unsigned int cmd, void __user *arg)
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rtnl_lock();
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if (r.arp_dev[0]) {
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err = -ENODEV;
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if ((dev = __dev_get_by_name(net, r.arp_dev)) == NULL)
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dev = __dev_get_by_name(net, r.arp_dev);
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if (dev == NULL)
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goto out;
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/* Mmmm... It is wrong... ARPHRD_NETROM==0 */
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@ -1243,7 +1262,8 @@ out:
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return err;
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}
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static int arp_netdev_event(struct notifier_block *this, unsigned long event, void *ptr)
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static int arp_netdev_event(struct notifier_block *this, unsigned long event,
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void *ptr)
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{
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struct net_device *dev = ptr;
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@ -1311,12 +1331,13 @@ static char *ax2asc2(ax25_address *a, char *buf)
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for (n = 0, s = buf; n < 6; n++) {
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c = (a->ax25_call[n] >> 1) & 0x7F;
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if (c != ' ') *s++ = c;
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if (c != ' ')
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*s++ = c;
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}
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*s++ = '-';
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if ((n = ((a->ax25_call[6] >> 1) & 0x0F)) > 9) {
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n = (a->ax25_call[6] >> 1) & 0x0F;
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if (n > 9) {
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*s++ = '1';
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n -= 10;
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}
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@ -1328,7 +1349,6 @@ static char *ax2asc2(ax25_address *a, char *buf)
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return "*";
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return buf;
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}
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#endif /* CONFIG_AX25 */
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