diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h index a2ef81466b00de3b07d3c7c6eea1b20e72468496..1f2735dba75366fbead77a5d8011c41715564bc3 100644 --- a/include/net/sctp/sctp.h +++ b/include/net/sctp/sctp.h @@ -162,6 +162,8 @@ struct sock *sctp_err_lookup(int family, struct sk_buff *, void sctp_err_finish(struct sock *, struct sctp_association *); void sctp_icmp_frag_needed(struct sock *, struct sctp_association *, struct sctp_transport *t, __u32 pmtu); +void sctp_icmp_redirect(struct sock *, struct sctp_transport *, + struct sk_buff *); void sctp_icmp_proto_unreachable(struct sock *sk, struct sctp_association *asoc, struct sctp_transport *t); diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c index 02162cfa504841b13e89f7258de03821d247e564..b4d7d28ce6d23f69dec1686c918afa01d5b9fd23 100644 --- a/net/dccp/ipv6.c +++ b/net/dccp/ipv6.c @@ -130,6 +130,13 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, np = inet6_sk(sk); + if (type == NDISC_REDIRECT) { + struct dst_entry *dst = __sk_dst_check(sk, np->dst_cookie); + + if (dst && dst->ops->redirect) + dst->ops->redirect(dst, skb); + } + if (type == ICMPV6_PKT_TOOBIG) { struct dst_entry *dst = NULL; diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c index 49d4d26bda88d798fc5a5284e412f1bd0152cc95..7e6139508ee7616f10996f33d75ae88e56bc5ca8 100644 --- a/net/ipv6/ah6.c +++ b/net/ipv6/ah6.c @@ -613,16 +613,18 @@ static void ah6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, struct xfrm_state *x; if (type != ICMPV6_DEST_UNREACH && - type != ICMPV6_PKT_TOOBIG) + type != ICMPV6_PKT_TOOBIG && + type != NDISC_REDIRECT) return; x = xfrm_state_lookup(net, skb->mark, (xfrm_address_t *)&iph->daddr, ah->spi, IPPROTO_AH, AF_INET6); if (!x) return; - NETDEBUG(KERN_DEBUG "pmtu discovery on SA AH/%08x/%pI6\n", - ntohl(ah->spi), &iph->daddr); - ip6_update_pmtu(skb, net, info, 0, 0); + if (type == NDISC_REDIRECT) + ip6_redirect(skb, net, 0, 0); + else + ip6_update_pmtu(skb, net, info, 0, 0); xfrm_state_put(x); } diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c index 89a615ba84f8825014a107486387abd5dc8cebb7..6dc7fd353ef53f9c08c9202340fc953bf3b294c5 100644 --- a/net/ipv6/esp6.c +++ b/net/ipv6/esp6.c @@ -434,16 +434,19 @@ static void esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, struct xfrm_state *x; if (type != ICMPV6_DEST_UNREACH && - type != ICMPV6_PKT_TOOBIG) + type != ICMPV6_PKT_TOOBIG && + type != NDISC_REDIRECT) return; x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr, esph->spi, IPPROTO_ESP, AF_INET6); if (!x) return; - pr_debug("pmtu discovery on SA ESP/%08x/%pI6\n", - ntohl(esph->spi), &iph->daddr); - ip6_update_pmtu(skb, net, info, 0, 0); + + if (type == NDISC_REDIRECT) + ip6_redirect(skb, net, 0, 0); + else + ip6_update_pmtu(skb, net, info, 0, 0); xfrm_state_put(x); } diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 6af3fcfdcbbdaff85f669c28617775cba4e7a6b7..0b5b60ec6f4ad4d155c73eeb37a3aa15e9ef91bd 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -550,6 +550,9 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, rel_type = ICMP_DEST_UNREACH; rel_code = ICMP_FRAG_NEEDED; break; + case NDISC_REDIRECT: + rel_type = ICMP_REDIRECT; + rel_code = ICMP_REDIR_HOST; default: return 0; } @@ -608,6 +611,10 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, skb_dst(skb2)->ops->update_pmtu(skb_dst(skb2), rel_info); } + if (rel_type == ICMP_REDIRECT) { + if (skb_dst(skb2)->ops->redirect) + skb_dst(skb2)->ops->redirect(skb_dst(skb2), skb2); + } icmp_send(skb2, rel_type, rel_code, htonl(rel_info)); diff --git a/net/ipv6/ipcomp6.c b/net/ipv6/ipcomp6.c index 92832385a8ef36f7c8f4d9aef1aae4baf7b33a7a..7af5aee75d982327e7b258f72091780e83a01cc4 100644 --- a/net/ipv6/ipcomp6.c +++ b/net/ipv6/ipcomp6.c @@ -64,7 +64,9 @@ static void ipcomp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, (struct ip_comp_hdr *)(skb->data + offset); struct xfrm_state *x; - if (type != ICMPV6_DEST_UNREACH && type != ICMPV6_PKT_TOOBIG) + if (type != ICMPV6_DEST_UNREACH && + type != ICMPV6_PKT_TOOBIG && + type != NDISC_REDIRECT) return; spi = htonl(ntohs(ipcomph->cpi)); @@ -73,9 +75,10 @@ static void ipcomp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, if (!x) return; - pr_debug("pmtu discovery on SA IPCOMP/%08x/%pI6\n", - spi, &iph->daddr); - ip6_update_pmtu(skb, net, info, 0, 0); + if (type == NDISC_REDIRECT) + ip6_redirect(skb, net, 0, 0); + else + ip6_update_pmtu(skb, net, info, 0, 0); xfrm_state_put(x); } diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c index b5c1dcb277370f09039ba4fd34dc596644b6114e..ef0579d5bca6b3794007145279f8ead1626aafe3 100644 --- a/net/ipv6/raw.c +++ b/net/ipv6/raw.c @@ -332,6 +332,8 @@ static void rawv6_err(struct sock *sk, struct sk_buff *skb, ip6_sk_update_pmtu(skb, sk, info); harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); } + if (type == NDISC_REDIRECT) + ip6_sk_redirect(skb, sk); if (np->recverr) { u8 *payload = skb->data; if (!inet->hdrincl) diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index 49aea94c9be3fcc9a898a734e28a54ccd6d49258..fbf1622fdeefa9324118e0e0c03ebc2823ef0865 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -539,6 +539,8 @@ static int ipip6_err(struct sk_buff *skb, u32 info) if (code != ICMP_EXC_TTL) return 0; break; + case ICMP_REDIRECT: + break; } err = -ENOENT; @@ -557,6 +559,12 @@ static int ipip6_err(struct sk_buff *skb, u32 info) err = 0; goto out; } + if (type == ICMP_REDIRECT) { + ipv4_redirect(skb, dev_net(skb->dev), t->dev->ifindex, 0, + IPPROTO_IPV6, 0); + err = 0; + goto out; + } if (t->parms.iph.daddr == 0) goto out; diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 70458a9cd837708f70e83d88628c321747d93289..7249e4bb9b8a7441ef490302d5e3f70180560816 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -363,6 +363,13 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, np = inet6_sk(sk); + if (type == NDISC_REDIRECT) { + struct dst_entry *dst = __sk_dst_check(sk, np->dst_cookie); + + if (dst && dst->ops->redirect) + dst->ops->redirect(dst,skb); + } + if (type == ICMPV6_PKT_TOOBIG) { struct dst_entry *dst; diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index 1ecd10249488b8962b91327db248569c4a97d1c6..99d0077b56b86f088a4a2fd2819a7b03e0eabd49 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -483,6 +483,8 @@ void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, if (type == ICMPV6_PKT_TOOBIG) ip6_sk_update_pmtu(skb, sk, info); + if (type == NDISC_REDIRECT) + ip6_sk_redirect(skb, sk); np = inet6_sk(sk); diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c index bb02038b822b3753fcaa6ef075653259a5a04d31..f5a9cb8257b9c09eea61a7051517d807fb28a622 100644 --- a/net/ipv6/xfrm6_policy.c +++ b/net/ipv6/xfrm6_policy.c @@ -215,6 +215,14 @@ static void xfrm6_update_pmtu(struct dst_entry *dst, u32 mtu) path->ops->update_pmtu(path, mtu); } +static void xfrm6_redirect(struct dst_entry *dst, struct sk_buff *skb) +{ + struct xfrm_dst *xdst = (struct xfrm_dst *)dst; + struct dst_entry *path = xdst->route; + + path->ops->redirect(path, skb); +} + static void xfrm6_dst_destroy(struct dst_entry *dst) { struct xfrm_dst *xdst = (struct xfrm_dst *)dst; @@ -261,6 +269,7 @@ static struct dst_ops xfrm6_dst_ops = { .protocol = cpu_to_be16(ETH_P_IPV6), .gc = xfrm6_garbage_collect, .update_pmtu = xfrm6_update_pmtu, + .redirect = xfrm6_redirect, .cow_metrics = dst_cow_metrics_generic, .destroy = xfrm6_dst_destroy, .ifdown = xfrm6_dst_ifdown, diff --git a/net/sctp/input.c b/net/sctp/input.c index 9fb4247f9a99830e67fc6722301e7f040ac19a6b..5943b7d77ddb174dc65ef338aa6bbee496bfaf33 100644 --- a/net/sctp/input.c +++ b/net/sctp/input.c @@ -423,8 +423,8 @@ void sctp_icmp_frag_needed(struct sock *sk, struct sctp_association *asoc, sctp_retransmit(&asoc->outqueue, t, SCTP_RTXR_PMTUD); } -static void sctp_icmp_redirect(struct sock *sk, struct sctp_transport *t, - struct sk_buff *skb) +void sctp_icmp_redirect(struct sock *sk, struct sctp_transport *t, + struct sk_buff *skb) { struct dst_entry *dst; diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index 91f479121c55b830591c1ef338cbe24c154f2773..ed7139ea7978dc664f6dfbff33977cf31bbc4325 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -185,6 +185,9 @@ SCTP_STATIC void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, goto out_unlock; } break; + case NDISC_REDIRECT: + sctp_icmp_redirect(sk, transport, skb); + break; default: break; }