X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=net%2Fipv6%2Fsit.c;h=98b7327d0949aa993751411f6512ebdf304f326f;hb=f2ba025b2036e52a176cddcf91b15ac2b10c644a;hp=664ab82e03b2ed1a1191a5111fb01e4014410235;hpb=8ac65de6474e72f1cfc130e3cc1a4bfd5cf8e310;p=cascardo%2Flinux.git diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index 664ab82e03b2..98b7327d0949 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -15,6 +15,7 @@ * Roger Venning : 6to4 support * Nate Thompson : 6to4 support * Fred Templin : isatap support + * Sascha Hlusiak : stateless autoconf for isatap */ #include @@ -80,7 +81,7 @@ struct sit_net { static DEFINE_RWLOCK(ipip6_lock); static struct ip_tunnel * ipip6_tunnel_lookup(struct net *net, - __be32 remote, __be32 local) + struct net_device *dev, __be32 remote, __be32 local) { unsigned h0 = HASH(remote); unsigned h1 = HASH(local); @@ -89,18 +90,25 @@ static struct ip_tunnel * ipip6_tunnel_lookup(struct net *net, for (t = sitn->tunnels_r_l[h0^h1]; t; t = t->next) { if (local == t->parms.iph.saddr && - remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP)) + remote == t->parms.iph.daddr && + (!dev || !t->parms.link || dev->iflink == t->parms.link) && + (t->dev->flags & IFF_UP)) return t; } for (t = sitn->tunnels_r[h0]; t; t = t->next) { - if (remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP)) + if (remote == t->parms.iph.daddr && + (!dev || !t->parms.link || dev->iflink == t->parms.link) && + (t->dev->flags & IFF_UP)) return t; } for (t = sitn->tunnels_l[h1]; t; t = t->next) { - if (local == t->parms.iph.saddr && (t->dev->flags&IFF_UP)) + if (local == t->parms.iph.saddr && + (!dev || !t->parms.link || dev->iflink == t->parms.link) && + (t->dev->flags & IFF_UP)) return t; } - if ((t = sitn->tunnels_wc[0]) != NULL && (t->dev->flags&IFF_UP)) + t = sitn->tunnels_wc[0]; + if ((t != NULL) && (t->dev->flags & IFF_UP)) return t; return NULL; } @@ -165,8 +173,14 @@ static struct ip_tunnel * ipip6_tunnel_locate(struct net *net, struct sit_net *sitn = net_generic(net, sit_net_id); for (tp = __ipip6_bucket(sitn, parms); (t = *tp) != NULL; tp = &t->next) { - if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr) - return t; + if (local == t->parms.iph.saddr && + remote == t->parms.iph.daddr && + parms->link == t->parms.link) { + if (create) + return NULL; + else + return t; + } } if (!create) goto failed; @@ -209,6 +223,44 @@ failed: return NULL; } +static void ipip6_tunnel_rs_timer(unsigned long data) +{ + struct ip_tunnel_prl_entry *p = (struct ip_tunnel_prl_entry *) data; + struct inet6_dev *ifp; + struct inet6_ifaddr *addr; + + spin_lock(&p->lock); + ifp = __in6_dev_get(p->tunnel->dev); + + read_lock_bh(&ifp->lock); + for (addr = ifp->addr_list; addr; addr = addr->if_next) { + struct in6_addr rtr; + + if (!(ipv6_addr_type(&addr->addr) & IPV6_ADDR_LINKLOCAL)) + continue; + + /* Send RS to guessed linklocal address of router + * + * Better: send to ff02::2 encapsuled in unicast directly + * to router-v4 instead of guessing the v6 address. + * + * Cisco/Windows seem to not set the u/l bit correctly, + * so we won't guess right. + */ + ipv6_addr_set(&rtr, htonl(0xFE800000), 0, 0, 0); + if (!__ipv6_isatap_ifid(rtr.s6_addr + 8, + p->addr)) { + ndisc_send_rs(p->tunnel->dev, &addr->addr, &rtr); + } + } + read_unlock_bh(&ifp->lock); + + mod_timer(&p->rs_timer, jiffies + HZ * p->rs_delay); + spin_unlock(&p->lock); + + return; +} + static struct ip_tunnel_prl_entry * __ipip6_tunnel_locate_prl(struct ip_tunnel *t, __be32 addr) { @@ -267,6 +319,7 @@ static int ipip6_tunnel_get_prl(struct ip_tunnel *t, continue; kp[c].addr = prl->addr; kp[c].flags = prl->flags; + kp[c].rs_delay = prl->rs_delay; c++; if (kprl.addr != htonl(INADDR_ANY)) break; @@ -316,11 +369,23 @@ ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg) } p->next = t->prl; + p->tunnel = t; t->prl = p; t->prl_count++; + + spin_lock_init(&p->lock); + setup_timer(&p->rs_timer, ipip6_tunnel_rs_timer, (unsigned long) p); update: p->addr = a->addr; p->flags = a->flags; + p->rs_delay = a->rs_delay; + if (p->rs_delay == 0) + p->rs_delay = IPTUNNEL_RS_DEFAULT_DELAY; + spin_lock(&p->lock); + del_timer(&p->rs_timer); + if (p->flags & PRL_DEFAULT) + mod_timer(&p->rs_timer, jiffies + 1); + spin_unlock(&p->lock); out: write_unlock(&ipip6_lock); return err; @@ -339,6 +404,9 @@ ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a) if ((*p)->addr == a->addr) { x = *p; *p = x->next; + spin_lock(&x->lock); + del_timer(&x->rs_timer); + spin_unlock(&x->lock); kfree(x); t->prl_count--; goto out; @@ -349,13 +417,16 @@ ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a) while (t->prl) { x = t->prl; t->prl = t->prl->next; + spin_lock(&x->lock); + del_timer(&x->rs_timer); + spin_unlock(&x->lock); kfree(x); t->prl_count--; } } out: write_unlock(&ipip6_lock); - return 0; + return err; } static int @@ -446,7 +517,10 @@ static int ipip6_err(struct sk_buff *skb, u32 info) err = -ENOENT; read_lock(&ipip6_lock); - t = ipip6_tunnel_lookup(dev_net(skb->dev), iph->daddr, iph->saddr); + t = ipip6_tunnel_lookup(dev_net(skb->dev), + skb->dev, + iph->daddr, + iph->saddr); if (t == NULL || t->parms.iph.daddr == 0) goto out; @@ -481,8 +555,9 @@ static int ipip6_rcv(struct sk_buff *skb) iph = ip_hdr(skb); read_lock(&ipip6_lock); - if ((tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), - iph->saddr, iph->daddr)) != NULL) { + tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), skb->dev, + iph->saddr, iph->daddr); + if (tunnel != NULL) { secpath_reset(skb); skb->mac_header = skb->network_header; skb_reset_network_header(skb); @@ -500,8 +575,7 @@ static int ipip6_rcv(struct sk_buff *skb) tunnel->dev->stats.rx_packets++; tunnel->dev->stats.rx_bytes += skb->len; skb->dev = tunnel->dev; - dst_release(skb->dst); - skb->dst = NULL; + skb_dst_drop(skb); nf_reset(skb); ipip6_ecn_decapsulate(iph, skb); netif_rx(skb); @@ -563,8 +637,8 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) if (dev->priv_flags & IFF_ISATAP) { struct neighbour *neigh = NULL; - if (skb->dst) - neigh = skb->dst->neighbour; + if (skb_dst(skb)) + neigh = skb_dst(skb)->neighbour; if (neigh == NULL) { if (net_ratelimit()) @@ -588,8 +662,8 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) if (!dst) { struct neighbour *neigh = NULL; - if (skb->dst) - neigh = skb->dst->neighbour; + if (skb_dst(skb)) + neigh = skb_dst(skb)->neighbour; if (neigh == NULL) { if (net_ratelimit()) @@ -639,7 +713,7 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) if (tiph->frag_off) mtu = dst_mtu(&rt->u.dst) - sizeof(struct iphdr); else - mtu = skb->dst ? dst_mtu(skb->dst) : dev->mtu; + mtu = skb_dst(skb) ? dst_mtu(skb_dst(skb)) : dev->mtu; if (mtu < 68) { stats->collisions++; @@ -648,8 +722,8 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) } if (mtu < IPV6_MIN_MTU) mtu = IPV6_MIN_MTU; - if (tunnel->parms.iph.daddr && skb->dst) - skb->dst->ops->update_pmtu(skb->dst, mtu); + if (tunnel->parms.iph.daddr && skb_dst(skb)) + skb_dst(skb)->ops->update_pmtu(skb_dst(skb), mtu); if (skb->len > mtu) { icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, dev); @@ -693,8 +767,8 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) skb_reset_network_header(skb); memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); IPCB(skb)->flags = 0; - dst_release(skb->dst); - skb->dst = &rt->u.dst; + skb_dst_drop(skb); + skb_dst_set(skb, &rt->u.dst); /* * Push down and install the IPIP header. @@ -944,6 +1018,7 @@ static void ipip6_tunnel_setup(struct net_device *dev) dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr); dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr); dev->flags = IFF_NOARP; + dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; dev->iflink = 0; dev->addr_len = 4; dev->features |= NETIF_F_NETNS_LOCAL;