X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2Fipv6%2Fndisc.c;h=b2531f80317e405bae41c93ff6d80cef240ab0c7;hb=6e23ae2a48750bda407a4a58f52a4865d7308bf5;hp=56ea92837307cef89e2f844b1a8a1945401a7676;hpb=e69a4adc669fe210817ec50ae3f9a7a5ad62d4e8;p=safe%2Fjmp%2Flinux-2.6 diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index 56ea928..b2531f8 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -1,9 +1,9 @@ /* * Neighbour Discovery for IPv6 - * Linux INET6 implementation + * Linux INET6 implementation * * Authors: - * Pedro Roque + * Pedro Roque * Mike Shaver * * This program is free software; you can redistribute it and/or @@ -15,9 +15,10 @@ /* * Changes: * + * Pierre Ynard : export userland ND options + * through netlink (RDNSS support) * Lars Fenneberg : fixed MTU setting on receipt * of an RA. - * * Janos Farkas : kmalloc failure checks * Alexey Kuznetsov : state machine reworked * and moved to net/core. @@ -78,6 +79,9 @@ #include #include +#include +#include + #include #include #include @@ -161,6 +165,8 @@ struct ndisc_options { struct nd_opt_hdr *nd_opts_ri; struct nd_opt_hdr *nd_opts_ri_end; #endif + struct nd_opt_hdr *nd_useropts; + struct nd_opt_hdr *nd_useropts_end; }; #define nd_opts_src_lladdr nd_opt_array[ND_OPT_SOURCE_LL_ADDR] @@ -225,6 +231,22 @@ static struct nd_opt_hdr *ndisc_next_option(struct nd_opt_hdr *cur, return (cur <= end && cur->nd_opt_type == type ? cur : NULL); } +static inline int ndisc_is_useropt(struct nd_opt_hdr *opt) +{ + return (opt->nd_opt_type == ND_OPT_RDNSS); +} + +static struct nd_opt_hdr *ndisc_next_useropt(struct nd_opt_hdr *cur, + struct nd_opt_hdr *end) +{ + if (!cur || !end || cur >= end) + return NULL; + do { + cur = ((void *)cur) + (cur->nd_opt_len << 3); + } while(cur < end && !ndisc_is_useropt(cur)); + return (cur <= end && ndisc_is_useropt(cur) ? cur : NULL); +} + static struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len, struct ndisc_options *ndopts) { @@ -256,7 +278,7 @@ static struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len, break; case ND_OPT_PREFIX_INFO: ndopts->nd_opts_pi_end = nd_opt; - if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0) + if (!ndopts->nd_opt_array[nd_opt->nd_opt_type]) ndopts->nd_opt_array[nd_opt->nd_opt_type] = nd_opt; break; #ifdef CONFIG_IPV6_ROUTE_INFO @@ -267,14 +289,21 @@ static struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len, break; #endif default: - /* - * Unknown options must be silently ignored, - * to accommodate future extension to the protocol. - */ - ND_PRINTK2(KERN_NOTICE - "%s(): ignored unsupported option; type=%d, len=%d\n", - __FUNCTION__, - nd_opt->nd_opt_type, nd_opt->nd_opt_len); + if (ndisc_is_useropt(nd_opt)) { + ndopts->nd_useropts_end = nd_opt; + if (!ndopts->nd_useropts) + ndopts->nd_useropts = nd_opt; + } else { + /* + * Unknown options must be silently ignored, + * to accommodate future extension to the + * protocol. + */ + ND_PRINTK2(KERN_NOTICE + "%s(): ignored unsupported option; type=%d, len=%d\n", + __FUNCTION__, + nd_opt->nd_opt_type, nd_opt->nd_opt_len); + } } opt_len -= l; nd_opt = ((void *)nd_opt) + l; @@ -308,7 +337,7 @@ int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int d ipv6_arcnet_mc_map(addr, buf); return 0; case ARPHRD_INFINIBAND: - ipv6_ib_mc_map(addr, buf); + ipv6_ib_mc_map(addr, dev->broadcast, buf); return 0; default: if (dir) { @@ -319,6 +348,8 @@ int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int d return -EINVAL; } +EXPORT_SYMBOL(ndisc_mc_map); + static u32 ndisc_hash(const void *pkey, const struct net_device *dev) { const u32 *p32 = pkey; @@ -352,7 +383,7 @@ static int ndisc_constructor(struct neighbour *neigh) rcu_read_unlock(); neigh->type = is_multicast ? RTN_MULTICAST : RTN_UNICAST; - if (dev->hard_header == NULL) { + if (!dev->header_ops) { neigh->nud_state = NUD_NOARP; neigh->ops = &ndisc_direct_ops; neigh->output = neigh->ops->queue_xmit; @@ -369,7 +400,7 @@ static int ndisc_constructor(struct neighbour *neigh) neigh->nud_state = NUD_NOARP; memcpy(neigh->ha, dev->broadcast, dev->addr_len); } - if (dev->hard_header_cache) + if (dev->header_ops->cache) neigh->ops = &ndisc_hh_ops; else neigh->ops = &ndisc_generic_ops; @@ -425,36 +456,25 @@ static inline void ndisc_flow_init(struct flowi *fl, u8 type, security_sk_classify_flow(ndisc_socket->sk, fl); } -static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh, - struct in6_addr *daddr, struct in6_addr *solicited_addr, - int router, int solicited, int override, int inc_opt) +static void __ndisc_send(struct net_device *dev, + struct neighbour *neigh, + struct in6_addr *daddr, struct in6_addr *saddr, + struct icmp6hdr *icmp6h, struct in6_addr *target, + int llinfo) { - struct in6_addr tmpaddr; - struct inet6_ifaddr *ifp; - struct inet6_dev *idev; struct flowi fl; - struct dst_entry* dst; - struct sock *sk = ndisc_socket->sk; - struct in6_addr *src_addr; - struct nd_msg *msg; - int len; - struct sk_buff *skb; + struct dst_entry *dst; + struct sock *sk = ndisc_socket->sk; + struct sk_buff *skb; + struct icmp6hdr *hdr; + struct inet6_dev *idev; + int len; int err; + u8 *opt, type; - len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); + type = icmp6h->icmp6_type; - /* for anycast or proxy, solicited_addr != src_addr */ - ifp = ipv6_get_ifaddr(solicited_addr, dev, 1); - if (ifp) { - src_addr = solicited_addr; - in6_ifa_put(ifp); - } else { - if (ipv6_dev_get_saddr(dev, daddr, &tmpaddr)) - return; - src_addr = &tmpaddr; - } - - ndisc_flow_init(&fl, NDISC_NEIGHBOUR_ADVERTISEMENT, src_addr, daddr, + ndisc_flow_init(&fl, type, saddr, daddr, dev->ifindex); dst = ndisc_dst_alloc(dev, neigh, daddr, ip6_output); @@ -465,228 +485,153 @@ static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh, if (err < 0) return; - if (inc_opt) { - if (dev->addr_len) - len += ndisc_opt_addr_space(dev); - else - inc_opt = 0; - } + if (!dev->addr_len) + llinfo = 0; + + len = sizeof(struct icmp6hdr) + (target ? sizeof(*target) : 0); + if (llinfo) + len += ndisc_opt_addr_space(dev); skb = sock_alloc_send_skb(sk, (MAX_HEADER + sizeof(struct ipv6hdr) + len + LL_RESERVED_SPACE(dev)), 1, &err); - - if (skb == NULL) { + if (!skb) { ND_PRINTK0(KERN_ERR - "ICMPv6 NA: %s() failed to allocate an skb.\n", + "ICMPv6 ND: %s() failed to allocate an skb.\n", __FUNCTION__); dst_release(dst); return; } skb_reserve(skb, LL_RESERVED_SPACE(dev)); - ip6_nd_hdr(sk, skb, dev, src_addr, daddr, IPPROTO_ICMPV6, len); - - msg = (struct nd_msg *)skb_put(skb, len); - skb->h.raw = (unsigned char*)msg; + ip6_nd_hdr(sk, skb, dev, saddr, daddr, IPPROTO_ICMPV6, len); - msg->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; - msg->icmph.icmp6_code = 0; - msg->icmph.icmp6_cksum = 0; + skb->transport_header = skb->tail; + skb_put(skb, len); - msg->icmph.icmp6_unused = 0; - msg->icmph.icmp6_router = router; - msg->icmph.icmp6_solicited = solicited; - msg->icmph.icmp6_override = override; + hdr = (struct icmp6hdr *)skb_transport_header(skb); + memcpy(hdr, icmp6h, sizeof(*hdr)); - /* Set the target address. */ - ipv6_addr_copy(&msg->target, solicited_addr); + opt = skb_transport_header(skb) + sizeof(struct icmp6hdr); + if (target) { + ipv6_addr_copy((struct in6_addr *)opt, target); + opt += sizeof(*target); + } - if (inc_opt) - ndisc_fill_addr_option(msg->opt, ND_OPT_TARGET_LL_ADDR, dev->dev_addr, + if (llinfo) + ndisc_fill_addr_option(opt, llinfo, dev->dev_addr, dev->addr_len, dev->type); - /* checksum */ - msg->icmph.icmp6_cksum = csum_ipv6_magic(src_addr, daddr, len, - IPPROTO_ICMPV6, - csum_partial((__u8 *) msg, - len, 0)); + hdr->icmp6_cksum = csum_ipv6_magic(saddr, daddr, len, + IPPROTO_ICMPV6, + csum_partial((__u8 *) hdr, + len, 0)); skb->dst = dst; + idev = in6_dev_get(dst->dev); IP6_INC_STATS(idev, IPSTATS_MIB_OUTREQUESTS); - err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, dst_output); + + err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, dst->dev, + dst_output); if (!err) { - ICMP6_INC_STATS(idev, ICMP6_MIB_OUTNEIGHBORADVERTISEMENTS); + ICMP6MSGOUT_INC_STATS(idev, type); ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS); } if (likely(idev != NULL)) in6_dev_put(idev); -} +} -void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh, - struct in6_addr *solicit, - struct in6_addr *daddr, struct in6_addr *saddr) +static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh, + struct in6_addr *daddr, struct in6_addr *solicited_addr, + int router, int solicited, int override, int inc_opt) { - struct flowi fl; - struct dst_entry* dst; - struct inet6_dev *idev; - struct sock *sk = ndisc_socket->sk; - struct sk_buff *skb; - struct nd_msg *msg; - struct in6_addr addr_buf; - int len; - int err; - int send_llinfo; + struct in6_addr tmpaddr; + struct inet6_ifaddr *ifp; + struct in6_addr *src_addr; + struct icmp6hdr icmp6h = { + .icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT, + }; - if (saddr == NULL) { - if (ipv6_get_lladdr(dev, &addr_buf)) + /* for anycast or proxy, solicited_addr != src_addr */ + ifp = ipv6_get_ifaddr(solicited_addr, dev, 1); + if (ifp) { + src_addr = solicited_addr; + if (ifp->flags & IFA_F_OPTIMISTIC) + override = 0; + in6_ifa_put(ifp); + } else { + if (ipv6_dev_get_saddr(dev, daddr, &tmpaddr)) return; - saddr = &addr_buf; - } - - ndisc_flow_init(&fl, NDISC_NEIGHBOUR_SOLICITATION, saddr, daddr, - dev->ifindex); - - dst = ndisc_dst_alloc(dev, neigh, daddr, ip6_output); - if (!dst) - return; - - err = xfrm_lookup(&dst, &fl, NULL, 0); - if (err < 0) - return; - - len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); - send_llinfo = dev->addr_len && !ipv6_addr_any(saddr); - if (send_llinfo) - len += ndisc_opt_addr_space(dev); - - skb = sock_alloc_send_skb(sk, - (MAX_HEADER + sizeof(struct ipv6hdr) + - len + LL_RESERVED_SPACE(dev)), - 1, &err); - if (skb == NULL) { - ND_PRINTK0(KERN_ERR - "ICMPv6 NA: %s() failed to allocate an skb.\n", - __FUNCTION__); - dst_release(dst); - return; + src_addr = &tmpaddr; } - skb_reserve(skb, LL_RESERVED_SPACE(dev)); - ip6_nd_hdr(sk, skb, dev, saddr, daddr, IPPROTO_ICMPV6, len); + icmp6h.icmp6_router = router; + icmp6h.icmp6_solicited = solicited; + icmp6h.icmp6_override = override; - msg = (struct nd_msg *)skb_put(skb, len); - skb->h.raw = (unsigned char*)msg; - msg->icmph.icmp6_type = NDISC_NEIGHBOUR_SOLICITATION; - msg->icmph.icmp6_code = 0; - msg->icmph.icmp6_cksum = 0; - msg->icmph.icmp6_unused = 0; - - /* Set the target address. */ - ipv6_addr_copy(&msg->target, solicit); + __ndisc_send(dev, neigh, daddr, src_addr, + &icmp6h, solicited_addr, + inc_opt ? ND_OPT_TARGET_LL_ADDR : 0); +} - if (send_llinfo) - ndisc_fill_addr_option(msg->opt, ND_OPT_SOURCE_LL_ADDR, dev->dev_addr, - dev->addr_len, dev->type); +void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh, + struct in6_addr *solicit, + struct in6_addr *daddr, struct in6_addr *saddr) +{ + struct in6_addr addr_buf; + struct icmp6hdr icmp6h = { + .icmp6_type = NDISC_NEIGHBOUR_SOLICITATION, + }; - /* checksum */ - msg->icmph.icmp6_cksum = csum_ipv6_magic(&skb->nh.ipv6h->saddr, - daddr, len, - IPPROTO_ICMPV6, - csum_partial((__u8 *) msg, - len, 0)); - /* send it! */ - skb->dst = dst; - idev = in6_dev_get(dst->dev); - IP6_INC_STATS(idev, IPSTATS_MIB_OUTREQUESTS); - err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, dst_output); - if (!err) { - ICMP6_INC_STATS(idev, ICMP6_MIB_OUTNEIGHBORSOLICITS); - ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS); + if (saddr == NULL) { + if (ipv6_get_lladdr(dev, &addr_buf, + (IFA_F_TENTATIVE|IFA_F_OPTIMISTIC))) + return; + saddr = &addr_buf; } - if (likely(idev != NULL)) - in6_dev_put(idev); + __ndisc_send(dev, neigh, daddr, saddr, + &icmp6h, solicit, + !ipv6_addr_any(saddr) ? ND_OPT_SOURCE_LL_ADDR : 0); } void ndisc_send_rs(struct net_device *dev, struct in6_addr *saddr, struct in6_addr *daddr) { - struct flowi fl; - struct dst_entry* dst; - struct inet6_dev *idev; - struct sock *sk = ndisc_socket->sk; - struct sk_buff *skb; - struct icmp6hdr *hdr; - __u8 * opt; - int len; - int err; - - ndisc_flow_init(&fl, NDISC_ROUTER_SOLICITATION, saddr, daddr, - dev->ifindex); - - dst = ndisc_dst_alloc(dev, NULL, daddr, ip6_output); - if (!dst) - return; - - err = xfrm_lookup(&dst, &fl, NULL, 0); - if (err < 0) - return; - - len = sizeof(struct icmp6hdr); - if (dev->addr_len) - len += ndisc_opt_addr_space(dev); - - skb = sock_alloc_send_skb(sk, - (MAX_HEADER + sizeof(struct ipv6hdr) + - len + LL_RESERVED_SPACE(dev)), - 1, &err); - if (skb == NULL) { - ND_PRINTK0(KERN_ERR - "ICMPv6 RS: %s() failed to allocate an skb.\n", - __FUNCTION__); - dst_release(dst); - return; - } - - skb_reserve(skb, LL_RESERVED_SPACE(dev)); - ip6_nd_hdr(sk, skb, dev, saddr, daddr, IPPROTO_ICMPV6, len); - - hdr = (struct icmp6hdr *)skb_put(skb, len); - skb->h.raw = (unsigned char*)hdr; - hdr->icmp6_type = NDISC_ROUTER_SOLICITATION; - hdr->icmp6_code = 0; - hdr->icmp6_cksum = 0; - hdr->icmp6_unused = 0; - - opt = (u8*) (hdr + 1); - - if (dev->addr_len) - ndisc_fill_addr_option(opt, ND_OPT_SOURCE_LL_ADDR, dev->dev_addr, - dev->addr_len, dev->type); - - /* checksum */ - hdr->icmp6_cksum = csum_ipv6_magic(&skb->nh.ipv6h->saddr, daddr, len, - IPPROTO_ICMPV6, - csum_partial((__u8 *) hdr, len, 0)); + struct icmp6hdr icmp6h = { + .icmp6_type = NDISC_ROUTER_SOLICITATION, + }; + int send_sllao = dev->addr_len; - /* send it! */ - skb->dst = dst; - idev = in6_dev_get(dst->dev); - IP6_INC_STATS(idev, IPSTATS_MIB_OUTREQUESTS); - err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, dst_output); - if (!err) { - ICMP6_INC_STATS(idev, ICMP6_MIB_OUTROUTERSOLICITS); - ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS); +#ifdef CONFIG_IPV6_OPTIMISTIC_DAD + /* + * According to section 2.2 of RFC 4429, we must not + * send router solicitations with a sllao from + * optimistic addresses, but we may send the solicitation + * if we don't include the sllao. So here we check + * if our address is optimistic, and if so, we + * suppress the inclusion of the sllao. + */ + if (send_sllao) { + struct inet6_ifaddr *ifp = ipv6_get_ifaddr(saddr, dev, 1); + if (ifp) { + if (ifp->flags & IFA_F_OPTIMISTIC) { + send_sllao = 0; + } + in6_ifa_put(ifp); + } else { + send_sllao = 0; + } } - - if (likely(idev != NULL)) - in6_dev_put(idev); +#endif + __ndisc_send(dev, NULL, daddr, saddr, + &icmp6h, NULL, + send_sllao ? ND_OPT_SOURCE_LL_ADDR : 0); } - + static void ndisc_error_report(struct neighbour *neigh, struct sk_buff *skb) { @@ -708,8 +653,8 @@ static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb) struct in6_addr *target = (struct in6_addr *)&neigh->primary_key; int probes = atomic_read(&neigh->probes); - if (skb && ipv6_chk_addr(&skb->nh.ipv6h->saddr, dev, 1)) - saddr = &skb->nh.ipv6h->saddr; + if (skb && ipv6_chk_addr(&ipv6_hdr(skb)->saddr, dev, 1)) + saddr = &ipv6_hdr(skb)->saddr; if ((probes -= neigh->parms->ucast_probes) < 0) { if (!(neigh->nud_state & NUD_VALID)) { @@ -732,11 +677,12 @@ static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb) static void ndisc_recv_ns(struct sk_buff *skb) { - struct nd_msg *msg = (struct nd_msg *)skb->h.raw; - struct in6_addr *saddr = &skb->nh.ipv6h->saddr; - struct in6_addr *daddr = &skb->nh.ipv6h->daddr; + struct nd_msg *msg = (struct nd_msg *)skb_transport_header(skb); + struct in6_addr *saddr = &ipv6_hdr(skb)->saddr; + struct in6_addr *daddr = &ipv6_hdr(skb)->daddr; u8 *lladdr = NULL; - u32 ndoptlen = skb->tail - msg->opt; + u32 ndoptlen = skb->tail - (skb->transport_header + + offsetof(struct nd_msg, opt)); struct ndisc_options ndopts; struct net_device *dev = skb->dev; struct inet6_ifaddr *ifp; @@ -748,7 +694,7 @@ static void ndisc_recv_ns(struct sk_buff *skb) int is_router; if (ipv6_addr_is_multicast(&msg->target)) { - ND_PRINTK2(KERN_WARNING + ND_PRINTK2(KERN_WARNING "ICMPv6 NS: multicast target address"); return; } @@ -768,7 +714,7 @@ static void ndisc_recv_ns(struct sk_buff *skb) } if (!ndisc_parse_options(msg->opt, ndoptlen, &ndopts)) { - ND_PRINTK2(KERN_WARNING + ND_PRINTK2(KERN_WARNING "ICMPv6 NS: invalid ND options\n"); return; } @@ -782,12 +728,12 @@ static void ndisc_recv_ns(struct sk_buff *skb) } /* RFC2461 7.1.1: - * If the IP source address is the unspecified address, - * there MUST NOT be source link-layer address option + * If the IP source address is the unspecified address, + * there MUST NOT be source link-layer address option * in the message. */ if (dad) { - ND_PRINTK2(KERN_WARNING + ND_PRINTK2(KERN_WARNING "ICMPv6 NS: bad DAD packet (link-layer address option)\n"); return; } @@ -796,28 +742,40 @@ static void ndisc_recv_ns(struct sk_buff *skb) inc = ipv6_addr_is_multicast(daddr); if ((ifp = ipv6_get_ifaddr(&msg->target, dev, 1)) != NULL) { - if (ifp->flags & IFA_F_TENTATIVE) { - /* Address is tentative. If the source - is unspecified address, it is someone - does DAD, otherwise we ignore solicitations - until DAD timer expires. - */ - if (!dad) - goto out; - if (dev->type == ARPHRD_IEEE802_TR) { - unsigned char *sadr = skb->mac.raw; - if (((sadr[8] ^ dev->dev_addr[0]) & 0x7f) == 0 && - sadr[9] == dev->dev_addr[1] && - sadr[10] == dev->dev_addr[2] && - sadr[11] == dev->dev_addr[3] && - sadr[12] == dev->dev_addr[4] && - sadr[13] == dev->dev_addr[5]) { - /* looped-back to us */ - goto out; + + if (ifp->flags & (IFA_F_TENTATIVE|IFA_F_OPTIMISTIC)) { + if (dad) { + if (dev->type == ARPHRD_IEEE802_TR) { + const unsigned char *sadr; + sadr = skb_mac_header(skb); + if (((sadr[8] ^ dev->dev_addr[0]) & 0x7f) == 0 && + sadr[9] == dev->dev_addr[1] && + sadr[10] == dev->dev_addr[2] && + sadr[11] == dev->dev_addr[3] && + sadr[12] == dev->dev_addr[4] && + sadr[13] == dev->dev_addr[5]) { + /* looped-back to us */ + goto out; + } } + + /* + * We are colliding with another node + * who is doing DAD + * so fail our DAD process + */ + addrconf_dad_failure(ifp); + return; + } else { + /* + * This is not a dad solicitation. + * If we are an optimistic node, + * we should respond. + * Otherwise, we should ignore it. + */ + if (!(ifp->flags & IFA_F_OPTIMISTIC)) + goto out; } - addrconf_dad_failure(ifp); - return; } idev = ifp->idev; @@ -829,7 +787,7 @@ static void ndisc_recv_ns(struct sk_buff *skb) } if (ipv6_chk_acast_addr(dev, &msg->target) || - (idev->cnf.forwarding && + (idev->cnf.forwarding && (ipv6_devconf.proxy_ndp || idev->cnf.proxy_ndp) && (pneigh = pneigh_lookup(&nd_tbl, &msg->target, dev, 0)) != NULL)) { @@ -839,8 +797,8 @@ static void ndisc_recv_ns(struct sk_buff *skb) idev->nd_parms->proxy_delay != 0) { /* * for anycast or proxy, - * sender should delay its response - * by a random time between 0 and + * sender should delay its response + * by a random time between 0 and * MAX_ANYCAST_DELAY_TIME seconds. * (RFC2461) -- yoshfuji */ @@ -869,17 +827,17 @@ static void ndisc_recv_ns(struct sk_buff *skb) else NEIGH_CACHE_STAT_INC(&nd_tbl, rcv_probes_ucast); - /* + /* * update / create cache entry * for the source address */ neigh = __neigh_lookup(&nd_tbl, saddr, dev, !inc || lladdr || !dev->addr_len); if (neigh) - neigh_update(neigh, lladdr, NUD_STALE, + neigh_update(neigh, lladdr, NUD_STALE, NEIGH_UPDATE_F_WEAK_OVERRIDE| NEIGH_UPDATE_F_OVERRIDE); - if (neigh || !dev->hard_header) { + if (neigh || !dev->header_ops) { ndisc_send_na(dev, neigh, saddr, &msg->target, is_router, 1, (ifp != NULL && inc), inc); @@ -898,11 +856,12 @@ out: static void ndisc_recv_na(struct sk_buff *skb) { - struct nd_msg *msg = (struct nd_msg *)skb->h.raw; - struct in6_addr *saddr = &skb->nh.ipv6h->saddr; - struct in6_addr *daddr = &skb->nh.ipv6h->daddr; + struct nd_msg *msg = (struct nd_msg *)skb_transport_header(skb); + struct in6_addr *saddr = &ipv6_hdr(skb)->saddr; + struct in6_addr *daddr = &ipv6_hdr(skb)->daddr; u8 *lladdr = NULL; - u32 ndoptlen = skb->tail - msg->opt; + u32 ndoptlen = skb->tail - (skb->transport_header + + offsetof(struct nd_msg, opt)); struct ndisc_options ndopts; struct net_device *dev = skb->dev; struct inet6_ifaddr *ifp; @@ -926,7 +885,7 @@ static void ndisc_recv_na(struct sk_buff *skb) "ICMPv6 NA: solicited NA is multicasted.\n"); return; } - + if (!ndisc_parse_options(msg->opt, ndoptlen, &ndopts)) { ND_PRINTK2(KERN_WARNING "ICMPv6 NS: invalid ND option\n"); @@ -1000,11 +959,11 @@ out: static void ndisc_recv_rs(struct sk_buff *skb) { - struct rs_msg *rs_msg = (struct rs_msg *) skb->h.raw; + struct rs_msg *rs_msg = (struct rs_msg *)skb_transport_header(skb); unsigned long ndoptlen = skb->len - sizeof(*rs_msg); struct neighbour *neigh; struct inet6_dev *idev; - struct in6_addr *saddr = &skb->nh.ipv6h->saddr; + struct in6_addr *saddr = &ipv6_hdr(skb)->saddr; struct ndisc_options ndopts; u8 *lladdr = NULL; @@ -1055,9 +1014,57 @@ out: in6_dev_put(idev); } +static void ndisc_ra_useropt(struct sk_buff *ra, struct nd_opt_hdr *opt) +{ + struct icmp6hdr *icmp6h = (struct icmp6hdr *)skb_transport_header(ra); + struct sk_buff *skb; + struct nlmsghdr *nlh; + struct nduseroptmsg *ndmsg; + int err; + int base_size = NLMSG_ALIGN(sizeof(struct nduseroptmsg) + + (opt->nd_opt_len << 3)); + size_t msg_size = base_size + nla_total_size(sizeof(struct in6_addr)); + + skb = nlmsg_new(msg_size, GFP_ATOMIC); + if (skb == NULL) { + err = -ENOBUFS; + goto errout; + } + + nlh = nlmsg_put(skb, 0, 0, RTM_NEWNDUSEROPT, base_size, 0); + if (nlh == NULL) { + goto nla_put_failure; + } + + ndmsg = nlmsg_data(nlh); + ndmsg->nduseropt_family = AF_INET6; + ndmsg->nduseropt_ifindex = ra->dev->ifindex; + ndmsg->nduseropt_icmp_type = icmp6h->icmp6_type; + ndmsg->nduseropt_icmp_code = icmp6h->icmp6_code; + ndmsg->nduseropt_opts_len = opt->nd_opt_len << 3; + + memcpy(ndmsg + 1, opt, opt->nd_opt_len << 3); + + NLA_PUT(skb, NDUSEROPT_SRCADDR, sizeof(struct in6_addr), + &ipv6_hdr(ra)->saddr); + nlmsg_end(skb, nlh); + + err = rtnl_notify(skb, 0, RTNLGRP_ND_USEROPT, NULL, GFP_ATOMIC); + if (err < 0) + goto errout; + + return; + +nla_put_failure: + nlmsg_free(skb); + err = -EMSGSIZE; +errout: + rtnl_set_sk_err(RTNLGRP_ND_USEROPT, err); +} + static void ndisc_router_discovery(struct sk_buff *skb) { - struct ra_msg *ra_msg = (struct ra_msg *) skb->h.raw; + struct ra_msg *ra_msg = (struct ra_msg *)skb_transport_header(skb); struct neighbour *neigh = NULL; struct inet6_dev *in6_dev; struct rt6_info *rt = NULL; @@ -1068,15 +1075,15 @@ static void ndisc_router_discovery(struct sk_buff *skb) __u8 * opt = (__u8 *)(ra_msg + 1); - optlen = (skb->tail - skb->h.raw) - sizeof(struct ra_msg); + optlen = (skb->tail - skb->transport_header) - sizeof(struct ra_msg); - if (!(ipv6_addr_type(&skb->nh.ipv6h->saddr) & IPV6_ADDR_LINKLOCAL)) { + if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) { ND_PRINTK2(KERN_WARNING "ICMPv6 RA: source address is not link-local.\n"); return; } if (optlen < 0) { - ND_PRINTK2(KERN_WARNING + ND_PRINTK2(KERN_WARNING "ICMPv6 RA: packet too short\n"); return; } @@ -1132,11 +1139,11 @@ static void ndisc_router_discovery(struct sk_buff *skb) pref = ra_msg->icmph.icmp6_router_pref; /* 10b is handled as if it were 00b (medium) */ if (pref == ICMPV6_ROUTER_PREF_INVALID || - in6_dev->cnf.accept_ra_rtr_pref) + !in6_dev->cnf.accept_ra_rtr_pref) pref = ICMPV6_ROUTER_PREF_MEDIUM; #endif - rt = rt6_get_dflt_router(&skb->nh.ipv6h->saddr, skb->dev); + rt = rt6_get_dflt_router(&ipv6_hdr(skb)->saddr, skb->dev); if (rt) neigh = rt->rt6i_nexthop; @@ -1151,7 +1158,7 @@ static void ndisc_router_discovery(struct sk_buff *skb) ND_PRINTK3(KERN_DEBUG "ICMPv6 RA: adding default router.\n"); - rt = rt6_add_dflt_router(&skb->nh.ipv6h->saddr, skb->dev, pref); + rt = rt6_add_dflt_router(&ipv6_hdr(skb)->saddr, skb->dev, pref); if (rt == NULL) { ND_PRINTK0(KERN_ERR "ICMPv6 RA: %s() failed to add default route.\n", @@ -1223,7 +1230,7 @@ skip_defrtr: */ if (!neigh) - neigh = __neigh_lookup(&nd_tbl, &skb->nh.ipv6h->saddr, + neigh = __neigh_lookup(&nd_tbl, &ipv6_hdr(skb)->saddr, skb->dev, 1); if (neigh) { u8 *lladdr = NULL; @@ -1252,7 +1259,7 @@ skip_defrtr: if (((struct route_info *)p)->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen) continue; rt6_route_rcv(skb->dev, (u8*)p, (p->nd_opt_len) << 3, - &skb->nh.ipv6h->saddr); + &ipv6_hdr(skb)->saddr); } } #endif @@ -1286,7 +1293,16 @@ skip_defrtr: rt6_mtu_change(skb->dev, mtu); } } - + + if (ndopts.nd_useropts) { + struct nd_opt_hdr *opt; + for (opt = ndopts.nd_useropts; + opt; + opt = ndisc_next_useropt(opt, ndopts.nd_useropts_end)) { + ndisc_ra_useropt(skb, opt); + } + } + if (ndopts.nd_opts_tgt_lladdr || ndopts.nd_opts_rh) { ND_PRINTK2(KERN_WARNING "ICMPv6 RA: invalid RA options"); @@ -1311,13 +1327,13 @@ static void ndisc_redirect_rcv(struct sk_buff *skb) int optlen; u8 *lladdr = NULL; - if (!(ipv6_addr_type(&skb->nh.ipv6h->saddr) & IPV6_ADDR_LINKLOCAL)) { + if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) { ND_PRINTK2(KERN_WARNING "ICMPv6 Redirect: source address is not link-local.\n"); return; } - optlen = skb->tail - skb->h.raw; + optlen = skb->tail - skb->transport_header; optlen -= sizeof(struct icmp6hdr) + 2 * sizeof(struct in6_addr); if (optlen < 0) { @@ -1326,7 +1342,7 @@ static void ndisc_redirect_rcv(struct sk_buff *skb) return; } - icmph = (struct icmp6hdr *) skb->h.raw; + icmph = icmp6_hdr(skb); target = (struct in6_addr *) (icmph + 1); dest = target + 1; @@ -1338,9 +1354,10 @@ static void ndisc_redirect_rcv(struct sk_buff *skb) if (ipv6_addr_equal(dest, target)) { on_link = 1; - } else if (!(ipv6_addr_type(target) & IPV6_ADDR_LINKLOCAL)) { - ND_PRINTK2(KERN_WARNING - "ICMPv6 Redirect: target address is not link-local.\n"); + } else if (ipv6_addr_type(target) != + (IPV6_ADDR_UNICAST|IPV6_ADDR_LINKLOCAL)) { + ND_PRINTK2(KERN_WARNING + "ICMPv6 Redirect: target address is not link-local unicast.\n"); return; } @@ -1352,11 +1369,11 @@ static void ndisc_redirect_rcv(struct sk_buff *skb) return; } - /* RFC2461 8.1: + /* RFC2461 8.1: * The IP source address of the Redirect MUST be the same as the current * first-hop router for the specified ICMP Destination Address. */ - + if (!ndisc_parse_options((u8*)(dest + 1), optlen, &ndopts)) { ND_PRINTK2(KERN_WARNING "ICMPv6 Redirect: invalid ND options\n"); @@ -1376,8 +1393,8 @@ static void ndisc_redirect_rcv(struct sk_buff *skb) neigh = __neigh_lookup(&nd_tbl, target, skb->dev, 1); if (neigh) { - rt6_redirect(dest, &skb->nh.ipv6h->daddr, - &skb->nh.ipv6h->saddr, neigh, lladdr, + rt6_redirect(dest, &ipv6_hdr(skb)->daddr, + &ipv6_hdr(skb)->saddr, neigh, lladdr, on_link); neigh_release(neigh); } @@ -1406,14 +1423,21 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh, dev = skb->dev; - if (ipv6_get_lladdr(dev, &saddr_buf)) { + if (ipv6_get_lladdr(dev, &saddr_buf, IFA_F_TENTATIVE)) { ND_PRINTK2(KERN_WARNING "ICMPv6 Redirect: no link-local address on %s\n", dev->name); - return; - } + return; + } + + if (!ipv6_addr_equal(&ipv6_hdr(skb)->daddr, target) && + ipv6_addr_type(target) != (IPV6_ADDR_UNICAST|IPV6_ADDR_LINKLOCAL)) { + ND_PRINTK2(KERN_WARNING + "ICMPv6 Redirect: target address is not link-local unicast.\n"); + return; + } - ndisc_flow_init(&fl, NDISC_REDIRECT, &saddr_buf, &skb->nh.ipv6h->saddr, + ndisc_flow_init(&fl, NDISC_REDIRECT, &saddr_buf, &ipv6_hdr(skb)->saddr, dev->ifindex); dst = ip6_route_output(NULL, &fl); @@ -1468,11 +1492,12 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh, hlen = 0; skb_reserve(buff, LL_RESERVED_SPACE(dev)); - ip6_nd_hdr(sk, buff, dev, &saddr_buf, &skb->nh.ipv6h->saddr, + ip6_nd_hdr(sk, buff, dev, &saddr_buf, &ipv6_hdr(skb)->saddr, IPPROTO_ICMPV6, len); - icmph = (struct icmp6hdr *)skb_put(buff, len); - buff->h.raw = (unsigned char*)icmph; + skb_set_transport_header(buff, skb_tail_pointer(buff) - buff->data); + skb_put(buff, len); + icmph = icmp6_hdr(buff); memset(icmph, 0, sizeof(struct icmp6hdr)); icmph->icmp6_type = NDISC_REDIRECT; @@ -1484,7 +1509,7 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh, addrp = (struct in6_addr *)(icmph + 1); ipv6_addr_copy(addrp, target); addrp++; - ipv6_addr_copy(addrp, &skb->nh.ipv6h->daddr); + ipv6_addr_copy(addrp, &ipv6_hdr(skb)->daddr); opt = (u8*) (addrp + 1); @@ -1500,23 +1525,24 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh, * build redirect option and copy skb over to the new packet. */ - memset(opt, 0, 8); + memset(opt, 0, 8); *(opt++) = ND_OPT_REDIRECT_HDR; *(opt++) = (rd_len >> 3); opt += 6; - memcpy(opt, skb->nh.ipv6h, rd_len - 8); + memcpy(opt, ipv6_hdr(skb), rd_len - 8); - icmph->icmp6_cksum = csum_ipv6_magic(&saddr_buf, &skb->nh.ipv6h->saddr, + icmph->icmp6_cksum = csum_ipv6_magic(&saddr_buf, &ipv6_hdr(skb)->saddr, len, IPPROTO_ICMPV6, csum_partial((u8 *) icmph, len, 0)); buff->dst = dst; idev = in6_dev_get(dst->dev); IP6_INC_STATS(idev, IPSTATS_MIB_OUTREQUESTS); - err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, buff, NULL, dst->dev, dst_output); + err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, buff, NULL, dst->dev, + dst_output); if (!err) { - ICMP6_INC_STATS(idev, ICMP6_MIB_OUTREDIRECTS); + ICMP6MSGOUT_INC_STATS(idev, NDISC_REDIRECT); ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS); } @@ -1537,19 +1563,19 @@ int ndisc_rcv(struct sk_buff *skb) if (!pskb_may_pull(skb, skb->len)) return 0; - msg = (struct nd_msg *) skb->h.raw; + msg = (struct nd_msg *)skb_transport_header(skb); - __skb_push(skb, skb->data-skb->h.raw); + __skb_push(skb, skb->data - skb_transport_header(skb)); - if (skb->nh.ipv6h->hop_limit != 255) { + if (ipv6_hdr(skb)->hop_limit != 255) { ND_PRINTK2(KERN_WARNING "ICMPv6 NDISC: invalid hop-limit: %d\n", - skb->nh.ipv6h->hop_limit); + ipv6_hdr(skb)->hop_limit); return 0; } if (msg->icmph.icmp6_code != 0) { - ND_PRINTK2(KERN_WARNING + ND_PRINTK2(KERN_WARNING "ICMPv6 NDISC: invalid ICMPv6 code: %d\n", msg->icmph.icmp6_code); return 0; @@ -1577,7 +1603,7 @@ int ndisc_rcv(struct sk_buff *skb) case NDISC_REDIRECT: ndisc_redirect_rcv(skb); break; - }; + } return 0; } @@ -1586,6 +1612,9 @@ static int ndisc_netdev_event(struct notifier_block *this, unsigned long event, { struct net_device *dev = ptr; + if (dev->nd_net != &init_net) + return NOTIFY_DONE; + switch (event) { case NETDEV_CHANGEADDR: neigh_changeaddr(&nd_tbl, dev); @@ -1632,30 +1661,26 @@ int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl, int write, struct file * f struct inet6_dev *idev; int ret; - if (ctl->ctl_name == NET_NEIGH_RETRANS_TIME || - ctl->ctl_name == NET_NEIGH_REACHABLE_TIME) + if ((strcmp(ctl->procname, "retrans_time") == 0) || + (strcmp(ctl->procname, "base_reachable_time") == 0)) ndisc_warn_deprecated_sysctl(ctl, "syscall", dev ? dev->name : "default"); - switch (ctl->ctl_name) { - case NET_NEIGH_RETRANS_TIME: + if (strcmp(ctl->procname, "retrans_time") == 0) ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); - break; - case NET_NEIGH_REACHABLE_TIME: + + else if (strcmp(ctl->procname, "base_reachable_time") == 0) ret = proc_dointvec_jiffies(ctl, write, filp, buffer, lenp, ppos); - break; - case NET_NEIGH_RETRANS_TIME_MS: - case NET_NEIGH_REACHABLE_TIME_MS: + + else if ((strcmp(ctl->procname, "retrans_time_ms") == 0) || + (strcmp(ctl->procname, "base_reachable_time_ms") == 0)) ret = proc_dointvec_ms_jiffies(ctl, write, filp, buffer, lenp, ppos); - break; - default: + else ret = -1; - } if (write && ret == 0 && dev && (idev = in6_dev_get(dev)) != NULL) { - if (ctl->ctl_name == NET_NEIGH_REACHABLE_TIME || - ctl->ctl_name == NET_NEIGH_REACHABLE_TIME_MS) + if (ctl->data == &idev->nd_parms->base_reachable_time) idev->nd_parms->reachable_time = neigh_rand_reach_time(idev->nd_parms->base_reachable_time); idev->tstamp = jiffies; inet6_ifinfo_notify(RTM_NEWLINK, idev); @@ -1667,8 +1692,7 @@ int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl, int write, struct file * f static int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl, int __user *name, int nlen, void __user *oldval, size_t __user *oldlenp, - void __user *newval, size_t newlen, - void **context) + void __user *newval, size_t newlen) { struct net_device *dev = ctl->extra1; struct inet6_dev *idev; @@ -1681,14 +1705,12 @@ static int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl, int __user *name, switch (ctl->ctl_name) { case NET_NEIGH_REACHABLE_TIME: ret = sysctl_jiffies(ctl, name, nlen, - oldval, oldlenp, newval, newlen, - context); + oldval, oldlenp, newval, newlen); break; case NET_NEIGH_RETRANS_TIME_MS: case NET_NEIGH_REACHABLE_TIME_MS: ret = sysctl_ms_jiffies(ctl, name, nlen, - oldval, oldlenp, newval, newlen, - context); + oldval, oldlenp, newval, newlen); break; default: ret = 0; @@ -1713,12 +1735,12 @@ int __init ndisc_init(struct net_proto_family *ops) { struct ipv6_pinfo *np; struct sock *sk; - int err; + int err; err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &ndisc_socket); if (err < 0) { ND_PRINTK0(KERN_ERR - "ICMPv6 NDISC: Failed to initialize the control socket (err %d).\n", + "ICMPv6 NDISC: Failed to initialize the control socket (err %d).\n", err); ndisc_socket = NULL; /* For safety. */ return err; @@ -1732,14 +1754,14 @@ int __init ndisc_init(struct net_proto_family *ops) np->mc_loop = 0; sk->sk_prot->unhash(sk); - /* - * Initialize the neighbour table - */ - + /* + * Initialize the neighbour table + */ + neigh_table_init(&nd_tbl); #ifdef CONFIG_SYSCTL - neigh_sysctl_register(NULL, &nd_tbl.parms, NET_IPV6, NET_IPV6_NEIGH, + neigh_sysctl_register(NULL, &nd_tbl.parms, NET_IPV6, NET_IPV6_NEIGH, "ipv6", &ndisc_ifinfo_sysctl_change, &ndisc_ifinfo_sysctl_strategy);