ipv6: Add redirect support to all protocol icmp error handlers.
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Родитель
3a5ad2ee5e
Коммит
ec18d9a269
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@ -162,6 +162,8 @@ struct sock *sctp_err_lookup(int family, struct sk_buff *,
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void sctp_err_finish(struct sock *, struct sctp_association *);
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void sctp_icmp_frag_needed(struct sock *, struct sctp_association *,
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struct sctp_transport *t, __u32 pmtu);
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void sctp_icmp_redirect(struct sock *, struct sctp_transport *,
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struct sk_buff *);
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void sctp_icmp_proto_unreachable(struct sock *sk,
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struct sctp_association *asoc,
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struct sctp_transport *t);
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@ -130,6 +130,13 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
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np = inet6_sk(sk);
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if (type == NDISC_REDIRECT) {
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struct dst_entry *dst = __sk_dst_check(sk, np->dst_cookie);
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if (dst && dst->ops->redirect)
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dst->ops->redirect(dst, skb);
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}
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if (type == ICMPV6_PKT_TOOBIG) {
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struct dst_entry *dst = NULL;
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@ -613,16 +613,18 @@ static void ah6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
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struct xfrm_state *x;
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if (type != ICMPV6_DEST_UNREACH &&
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type != ICMPV6_PKT_TOOBIG)
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type != ICMPV6_PKT_TOOBIG &&
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type != NDISC_REDIRECT)
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return;
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x = xfrm_state_lookup(net, skb->mark, (xfrm_address_t *)&iph->daddr, ah->spi, IPPROTO_AH, AF_INET6);
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if (!x)
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return;
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NETDEBUG(KERN_DEBUG "pmtu discovery on SA AH/%08x/%pI6\n",
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ntohl(ah->spi), &iph->daddr);
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ip6_update_pmtu(skb, net, info, 0, 0);
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if (type == NDISC_REDIRECT)
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ip6_redirect(skb, net, 0, 0);
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else
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ip6_update_pmtu(skb, net, info, 0, 0);
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xfrm_state_put(x);
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}
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@ -434,16 +434,19 @@ static void esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
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struct xfrm_state *x;
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if (type != ICMPV6_DEST_UNREACH &&
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type != ICMPV6_PKT_TOOBIG)
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type != ICMPV6_PKT_TOOBIG &&
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type != NDISC_REDIRECT)
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return;
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x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
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esph->spi, IPPROTO_ESP, AF_INET6);
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if (!x)
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return;
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pr_debug("pmtu discovery on SA ESP/%08x/%pI6\n",
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ntohl(esph->spi), &iph->daddr);
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ip6_update_pmtu(skb, net, info, 0, 0);
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if (type == NDISC_REDIRECT)
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ip6_redirect(skb, net, 0, 0);
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else
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ip6_update_pmtu(skb, net, info, 0, 0);
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xfrm_state_put(x);
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}
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@ -550,6 +550,9 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
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rel_type = ICMP_DEST_UNREACH;
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rel_code = ICMP_FRAG_NEEDED;
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break;
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case NDISC_REDIRECT:
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rel_type = ICMP_REDIRECT;
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rel_code = ICMP_REDIR_HOST;
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default:
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return 0;
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}
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@ -608,6 +611,10 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
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skb_dst(skb2)->ops->update_pmtu(skb_dst(skb2), rel_info);
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}
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if (rel_type == ICMP_REDIRECT) {
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if (skb_dst(skb2)->ops->redirect)
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skb_dst(skb2)->ops->redirect(skb_dst(skb2), skb2);
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}
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icmp_send(skb2, rel_type, rel_code, htonl(rel_info));
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@ -64,7 +64,9 @@ static void ipcomp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
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(struct ip_comp_hdr *)(skb->data + offset);
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struct xfrm_state *x;
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if (type != ICMPV6_DEST_UNREACH && type != ICMPV6_PKT_TOOBIG)
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if (type != ICMPV6_DEST_UNREACH &&
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type != ICMPV6_PKT_TOOBIG &&
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type != NDISC_REDIRECT)
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return;
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spi = htonl(ntohs(ipcomph->cpi));
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@ -73,9 +75,10 @@ static void ipcomp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
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if (!x)
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return;
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pr_debug("pmtu discovery on SA IPCOMP/%08x/%pI6\n",
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spi, &iph->daddr);
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ip6_update_pmtu(skb, net, info, 0, 0);
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if (type == NDISC_REDIRECT)
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ip6_redirect(skb, net, 0, 0);
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else
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ip6_update_pmtu(skb, net, info, 0, 0);
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xfrm_state_put(x);
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}
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@ -332,6 +332,8 @@ static void rawv6_err(struct sock *sk, struct sk_buff *skb,
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ip6_sk_update_pmtu(skb, sk, info);
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harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
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}
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if (type == NDISC_REDIRECT)
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ip6_sk_redirect(skb, sk);
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if (np->recverr) {
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u8 *payload = skb->data;
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if (!inet->hdrincl)
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@ -539,6 +539,8 @@ static int ipip6_err(struct sk_buff *skb, u32 info)
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if (code != ICMP_EXC_TTL)
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return 0;
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break;
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case ICMP_REDIRECT:
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break;
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}
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err = -ENOENT;
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@ -557,6 +559,12 @@ static int ipip6_err(struct sk_buff *skb, u32 info)
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err = 0;
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goto out;
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}
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if (type == ICMP_REDIRECT) {
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ipv4_redirect(skb, dev_net(skb->dev), t->dev->ifindex, 0,
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IPPROTO_IPV6, 0);
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err = 0;
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goto out;
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}
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if (t->parms.iph.daddr == 0)
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goto out;
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@ -363,6 +363,13 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
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np = inet6_sk(sk);
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if (type == NDISC_REDIRECT) {
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struct dst_entry *dst = __sk_dst_check(sk, np->dst_cookie);
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if (dst && dst->ops->redirect)
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dst->ops->redirect(dst,skb);
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}
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if (type == ICMPV6_PKT_TOOBIG) {
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struct dst_entry *dst;
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@ -483,6 +483,8 @@ void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
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if (type == ICMPV6_PKT_TOOBIG)
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ip6_sk_update_pmtu(skb, sk, info);
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if (type == NDISC_REDIRECT)
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ip6_sk_redirect(skb, sk);
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np = inet6_sk(sk);
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@ -215,6 +215,14 @@ static void xfrm6_update_pmtu(struct dst_entry *dst, u32 mtu)
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path->ops->update_pmtu(path, mtu);
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}
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static void xfrm6_redirect(struct dst_entry *dst, struct sk_buff *skb)
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{
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struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
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struct dst_entry *path = xdst->route;
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path->ops->redirect(path, skb);
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}
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static void xfrm6_dst_destroy(struct dst_entry *dst)
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{
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struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
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@ -261,6 +269,7 @@ static struct dst_ops xfrm6_dst_ops = {
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.protocol = cpu_to_be16(ETH_P_IPV6),
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.gc = xfrm6_garbage_collect,
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.update_pmtu = xfrm6_update_pmtu,
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.redirect = xfrm6_redirect,
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.cow_metrics = dst_cow_metrics_generic,
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.destroy = xfrm6_dst_destroy,
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.ifdown = xfrm6_dst_ifdown,
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@ -423,8 +423,8 @@ void sctp_icmp_frag_needed(struct sock *sk, struct sctp_association *asoc,
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sctp_retransmit(&asoc->outqueue, t, SCTP_RTXR_PMTUD);
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}
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static void sctp_icmp_redirect(struct sock *sk, struct sctp_transport *t,
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struct sk_buff *skb)
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void sctp_icmp_redirect(struct sock *sk, struct sctp_transport *t,
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struct sk_buff *skb)
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{
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struct dst_entry *dst;
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@ -185,6 +185,9 @@ SCTP_STATIC void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
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goto out_unlock;
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}
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break;
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case NDISC_REDIRECT:
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sctp_icmp_redirect(sk, transport, skb);
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break;
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default:
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break;
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}
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