diff options
Diffstat (limited to 'net/ipv4/ip_gre.c')
-rw-r--r-- | net/ipv4/ip_gre.c | 136 |
1 files changed, 79 insertions, 57 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 4b93f32de10..63f69171935 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -176,7 +176,8 @@ static struct ip_tunnel * ipgre_tunnel_lookup(__be32 remote, __be32 local, __be3 } for (t = tunnels_l[h1]; t; t = t->next) { if (local == t->parms.iph.saddr || - (local == t->parms.iph.daddr && MULTICAST(local))) { + (local == t->parms.iph.daddr && + ipv4_is_multicast(local))) { if (t->parms.i_key == key && (t->dev->flags&IFF_UP)) return t; } @@ -201,7 +202,7 @@ static struct ip_tunnel **__ipgre_bucket(struct ip_tunnel_parm *parms) if (local) prio |= 1; - if (remote && !MULTICAST(remote)) { + if (remote && !ipv4_is_multicast(remote)) { prio |= 2; h ^= HASH(remote); } @@ -367,7 +368,8 @@ static void ipgre_err(struct sk_buff *skb, u32 info) read_lock(&ipgre_lock); t = ipgre_tunnel_lookup(iph->daddr, iph->saddr, (flags&GRE_KEY) ? *(((__be32*)p) + (grehlen>>2) - 1) : 0); - if (t == NULL || t->parms.iph.daddr == 0 || MULTICAST(t->parms.iph.daddr)) + if (t == NULL || t->parms.iph.daddr == 0 || + ipv4_is_multicast(t->parms.iph.daddr)) goto out; if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED) @@ -478,7 +480,7 @@ out: fl.fl4_dst = eiph->saddr; fl.fl4_tos = RT_TOS(eiph->tos); fl.proto = IPPROTO_GRE; - if (ip_route_output_key(&rt, &fl)) { + if (ip_route_output_key(&init_net, &rt, &fl)) { kfree_skb(skb2); return; } @@ -491,7 +493,7 @@ out: fl.fl4_dst = eiph->daddr; fl.fl4_src = eiph->saddr; fl.fl4_tos = eiph->tos; - if (ip_route_output_key(&rt, &fl) || + if (ip_route_output_key(&init_net, &rt, &fl) || rt->u.dst.dev->type != ARPHRD_IPGRE) { ip_rt_put(rt); kfree_skb(skb2); @@ -619,7 +621,7 @@ static int ipgre_rcv(struct sk_buff *skb) skb_postpull_rcsum(skb, skb_transport_header(skb), offset); skb->pkt_type = PACKET_HOST; #ifdef CONFIG_NET_IPGRE_BROADCAST - if (MULTICAST(iph->daddr)) { + if (ipv4_is_multicast(iph->daddr)) { /* Looped back packet, drop it! */ if (((struct rtable*)skb->dst)->fl.iif == 0) goto drop; @@ -746,7 +748,7 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) .saddr = tiph->saddr, .tos = RT_TOS(tos) } }, .proto = IPPROTO_GRE }; - if (ip_route_output_key(&rt, &fl)) { + if (ip_route_output_key(&init_net, &rt, &fl)) { tunnel->stat.tx_carrier_errors++; goto tx_error; } @@ -783,7 +785,8 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) struct rt6_info *rt6 = (struct rt6_info*)skb->dst; if (rt6 && mtu < dst_mtu(skb->dst) && mtu >= IPV6_MIN_MTU) { - if ((tunnel->parms.iph.daddr && !MULTICAST(tunnel->parms.iph.daddr)) || + if ((tunnel->parms.iph.daddr && + !ipv4_is_multicast(tunnel->parms.iph.daddr)) || rt6->rt6i_dst.plen == 128) { rt6->rt6i_flags |= RTF_MODIFIED; skb->dst->metrics[RTAX_MTU-1] = mtu; @@ -896,6 +899,59 @@ tx_error: return 0; } +static void ipgre_tunnel_bind_dev(struct net_device *dev) +{ + struct net_device *tdev = NULL; + struct ip_tunnel *tunnel; + struct iphdr *iph; + int hlen = LL_MAX_HEADER; + int mtu = ETH_DATA_LEN; + int addend = sizeof(struct iphdr) + 4; + + tunnel = netdev_priv(dev); + iph = &tunnel->parms.iph; + + /* Guess output device to choose reasonable mtu and hard_header_len */ + + if (iph->daddr) { + struct flowi fl = { .oif = tunnel->parms.link, + .nl_u = { .ip4_u = + { .daddr = iph->daddr, + .saddr = iph->saddr, + .tos = RT_TOS(iph->tos) } }, + .proto = IPPROTO_GRE }; + struct rtable *rt; + if (!ip_route_output_key(&init_net, &rt, &fl)) { + tdev = rt->u.dst.dev; + ip_rt_put(rt); + } + dev->flags |= IFF_POINTOPOINT; + } + + if (!tdev && tunnel->parms.link) + tdev = __dev_get_by_index(&init_net, tunnel->parms.link); + + if (tdev) { + hlen = tdev->hard_header_len; + mtu = tdev->mtu; + } + dev->iflink = tunnel->parms.link; + + /* Precalculate GRE options length */ + if (tunnel->parms.o_flags&(GRE_CSUM|GRE_KEY|GRE_SEQ)) { + if (tunnel->parms.o_flags&GRE_CSUM) + addend += 4; + if (tunnel->parms.o_flags&GRE_KEY) + addend += 4; + if (tunnel->parms.o_flags&GRE_SEQ) + addend += 4; + } + dev->hard_header_len = hlen + addend; + dev->mtu = mtu - addend; + tunnel->hlen = addend; + +} + static int ipgre_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd) { @@ -956,7 +1012,7 @@ ipgre_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd) t = netdev_priv(dev); - if (MULTICAST(p.iph.daddr)) + if (ipv4_is_multicast(p.iph.daddr)) nflags = IFF_BROADCAST; else if (p.iph.daddr) nflags = IFF_POINTOPOINT; @@ -983,6 +1039,11 @@ ipgre_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd) t->parms.iph.ttl = p.iph.ttl; t->parms.iph.tos = p.iph.tos; t->parms.iph.frag_off = p.iph.frag_off; + if (t->parms.link != p.link) { + t->parms.link = p.link; + ipgre_tunnel_bind_dev(dev); + netdev_state_change(dev); + } } if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p))) err = -EFAULT; @@ -1085,7 +1146,7 @@ static int ipgre_header(struct sk_buff *skb, struct net_device *dev, memcpy(&iph->daddr, daddr, 4); return t->hlen; } - if (iph->daddr && !MULTICAST(iph->daddr)) + if (iph->daddr && !ipv4_is_multicast(iph->daddr)) return t->hlen; return -t->hlen; @@ -1108,7 +1169,7 @@ static int ipgre_open(struct net_device *dev) { struct ip_tunnel *t = netdev_priv(dev); - if (MULTICAST(t->parms.iph.daddr)) { + if (ipv4_is_multicast(t->parms.iph.daddr)) { struct flowi fl = { .oif = t->parms.link, .nl_u = { .ip4_u = { .daddr = t->parms.iph.daddr, @@ -1116,7 +1177,7 @@ static int ipgre_open(struct net_device *dev) .tos = RT_TOS(t->parms.iph.tos) } }, .proto = IPPROTO_GRE }; struct rtable *rt; - if (ip_route_output_key(&rt, &fl)) + if (ip_route_output_key(&init_net, &rt, &fl)) return -EADDRNOTAVAIL; dev = rt->u.dst.dev; ip_rt_put(rt); @@ -1131,8 +1192,9 @@ static int ipgre_open(struct net_device *dev) static int ipgre_close(struct net_device *dev) { struct ip_tunnel *t = netdev_priv(dev); - if (MULTICAST(t->parms.iph.daddr) && t->mlink) { - struct in_device *in_dev = inetdev_by_index(t->mlink); + if (ipv4_is_multicast(t->parms.iph.daddr) && t->mlink) { + struct in_device *in_dev; + in_dev = inetdev_by_index(dev->nd_net, t->mlink); if (in_dev) { ip_mc_dec_group(in_dev, t->parms.iph.daddr); in_dev_put(in_dev); @@ -1162,12 +1224,8 @@ static void ipgre_tunnel_setup(struct net_device *dev) static int ipgre_tunnel_init(struct net_device *dev) { - struct net_device *tdev = NULL; struct ip_tunnel *tunnel; struct iphdr *iph; - int hlen = LL_MAX_HEADER; - int mtu = ETH_DATA_LEN; - int addend = sizeof(struct iphdr) + 4; tunnel = netdev_priv(dev); iph = &tunnel->parms.iph; @@ -1178,25 +1236,11 @@ static int ipgre_tunnel_init(struct net_device *dev) memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4); memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4); - /* Guess output device to choose reasonable mtu and hard_header_len */ + ipgre_tunnel_bind_dev(dev); if (iph->daddr) { - struct flowi fl = { .oif = tunnel->parms.link, - .nl_u = { .ip4_u = - { .daddr = iph->daddr, - .saddr = iph->saddr, - .tos = RT_TOS(iph->tos) } }, - .proto = IPPROTO_GRE }; - struct rtable *rt; - if (!ip_route_output_key(&rt, &fl)) { - tdev = rt->u.dst.dev; - ip_rt_put(rt); - } - - dev->flags |= IFF_POINTOPOINT; - #ifdef CONFIG_NET_IPGRE_BROADCAST - if (MULTICAST(iph->daddr)) { + if (ipv4_is_multicast(iph->daddr)) { if (!iph->saddr) return -EINVAL; dev->flags = IFF_BROADCAST; @@ -1205,31 +1249,9 @@ static int ipgre_tunnel_init(struct net_device *dev) dev->stop = ipgre_close; } #endif - } else { + } else dev->header_ops = &ipgre_header_ops; - } - - if (!tdev && tunnel->parms.link) - tdev = __dev_get_by_index(&init_net, tunnel->parms.link); - - if (tdev) { - hlen = tdev->hard_header_len; - mtu = tdev->mtu; - } - dev->iflink = tunnel->parms.link; - /* Precalculate GRE options length */ - if (tunnel->parms.o_flags&(GRE_CSUM|GRE_KEY|GRE_SEQ)) { - if (tunnel->parms.o_flags&GRE_CSUM) - addend += 4; - if (tunnel->parms.o_flags&GRE_KEY) - addend += 4; - if (tunnel->parms.o_flags&GRE_SEQ) - addend += 4; - } - dev->hard_header_len = hlen + addend; - dev->mtu = mtu - addend; - tunnel->hlen = addend; return 0; } |