diff options
author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-04-19 16:17:34 (GMT) |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-04-19 16:17:34 (GMT) |
commit | cf816ecb533ab96b883dfdc0db174598b5b5c4d2 (patch) | |
tree | 1b7705db288ae2917105e624b01fdf81e0882bf1 /net/ipv6/ndisc.c | |
parent | adf6d34e460387ee3e8f1e1875d52bff51212c7d (diff) | |
parent | 15f7d677ccff6f0f5de8a1ee43a792567e9f9de9 (diff) | |
download | linux-fsl-qoriq-cf816ecb533ab96b883dfdc0db174598b5b5c4d2.tar.xz |
Merge branch 'merge-fixes' into devel
Diffstat (limited to 'net/ipv6/ndisc.c')
-rw-r--r-- | net/ipv6/ndisc.c | 237 |
1 files changed, 145 insertions, 92 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index 452a2ac..2c74885 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -84,13 +84,12 @@ #include <net/flow.h> #include <net/ip6_checksum.h> +#include <net/inet_common.h> #include <linux/proc_fs.h> #include <linux/netfilter.h> #include <linux/netfilter_ipv6.h> -static struct socket *ndisc_socket; - static u32 ndisc_hash(const void *pkey, const struct net_device *dev); static int ndisc_constructor(struct neighbour *neigh); static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb); @@ -270,7 +269,7 @@ static struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len, if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) { ND_PRINTK2(KERN_WARNING "%s(): duplicated ND6 option found: type=%d\n", - __FUNCTION__, + __func__, nd_opt->nd_opt_type); } else { ndopts->nd_opt_array[nd_opt->nd_opt_type] = nd_opt; @@ -301,7 +300,7 @@ static struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len, */ ND_PRINTK2(KERN_NOTICE "%s(): ignored unsupported option; type=%d, len=%d\n", - __FUNCTION__, + __func__, nd_opt->nd_opt_type, nd_opt->nd_opt_len); } } @@ -441,30 +440,17 @@ static void pndisc_destructor(struct pneigh_entry *n) /* * Send a Neighbour Advertisement */ - -static inline void ndisc_flow_init(struct flowi *fl, u8 type, - struct in6_addr *saddr, struct in6_addr *daddr, - int oif) -{ - memset(fl, 0, sizeof(*fl)); - ipv6_addr_copy(&fl->fl6_src, saddr); - ipv6_addr_copy(&fl->fl6_dst, daddr); - fl->proto = IPPROTO_ICMPV6; - fl->fl_icmp_type = type; - fl->fl_icmp_code = 0; - fl->oif = oif; - security_sk_classify_flow(ndisc_socket->sk, fl); -} - 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, + const struct in6_addr *daddr, + const struct in6_addr *saddr, + struct icmp6hdr *icmp6h, const struct in6_addr *target, int llinfo) { struct flowi fl; struct dst_entry *dst; - struct sock *sk = ndisc_socket->sk; + struct net *net = dev_net(dev); + struct sock *sk = net->ipv6.ndisc_sk; struct sk_buff *skb; struct icmp6hdr *hdr; struct inet6_dev *idev; @@ -474,10 +460,9 @@ static void __ndisc_send(struct net_device *dev, type = icmp6h->icmp6_type; - ndisc_flow_init(&fl, type, saddr, daddr, - dev->ifindex); + icmpv6_flow_init(sk, &fl, type, saddr, daddr, dev->ifindex); - dst = ndisc_dst_alloc(dev, neigh, daddr, ip6_output); + dst = icmp6_dst_alloc(dev, neigh, daddr); if (!dst) return; @@ -499,7 +484,7 @@ static void __ndisc_send(struct net_device *dev, if (!skb) { ND_PRINTK0(KERN_ERR "ICMPv6 ND: %s() failed to allocate an skb.\n", - __FUNCTION__); + __func__); dst_release(dst); return; } @@ -545,25 +530,28 @@ static void __ndisc_send(struct net_device *dev, } 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) + const struct in6_addr *daddr, + const struct in6_addr *solicited_addr, + int router, int solicited, int override, int inc_opt) { struct in6_addr tmpaddr; struct inet6_ifaddr *ifp; - struct in6_addr *src_addr; + const struct in6_addr *src_addr; struct icmp6hdr icmp6h = { .icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT, }; /* for anycast or proxy, solicited_addr != src_addr */ - ifp = ipv6_get_ifaddr(&init_net, solicited_addr, dev, 1); + ifp = ipv6_get_ifaddr(dev_net(dev), 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)) + if (ipv6_dev_get_saddr(dev, daddr, + inet6_sk(dev_net(dev)->ipv6.ndisc_sk)->srcprefs, + &tmpaddr)) return; src_addr = &tmpaddr; } @@ -578,8 +566,8 @@ static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh, } void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh, - struct in6_addr *solicit, - struct in6_addr *daddr, struct in6_addr *saddr) + const struct in6_addr *solicit, + const struct in6_addr *daddr, const struct in6_addr *saddr) { struct in6_addr addr_buf; struct icmp6hdr icmp6h = { @@ -598,8 +586,8 @@ void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh, !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) +void ndisc_send_rs(struct net_device *dev, const struct in6_addr *saddr, + const struct in6_addr *daddr) { struct icmp6hdr icmp6h = { .icmp6_type = NDISC_ROUTER_SOLICITATION, @@ -616,7 +604,7 @@ void ndisc_send_rs(struct net_device *dev, struct in6_addr *saddr, * suppress the inclusion of the sllao. */ if (send_sllao) { - struct inet6_ifaddr *ifp = ipv6_get_ifaddr(&init_net, saddr, + struct inet6_ifaddr *ifp = ipv6_get_ifaddr(dev_net(dev), saddr, dev, 1); if (ifp) { if (ifp->flags & IFA_F_OPTIMISTIC) { @@ -654,7 +642,7 @@ 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(&init_net, &ipv6_hdr(skb)->saddr, dev, 1)) + if (skb && ipv6_chk_addr(dev_net(dev), &ipv6_hdr(skb)->saddr, dev, 1)) saddr = &ipv6_hdr(skb)->saddr; if ((probes -= neigh->parms->ucast_probes) < 0) { @@ -662,7 +650,7 @@ static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb) ND_PRINTK1(KERN_DEBUG "%s(): trying to ucast probe in NUD_INVALID: " NIP6_FMT "\n", - __FUNCTION__, + __func__, NIP6(*target)); } ndisc_send_ns(dev, neigh, target, target, saddr); @@ -676,18 +664,19 @@ static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb) } } -static struct pneigh_entry *pndisc_check_router(struct net_device *dev, - struct in6_addr *addr, int *is_router) +static int pndisc_is_router(const void *pkey, + struct net_device *dev) { struct pneigh_entry *n; + int ret = -1; read_lock_bh(&nd_tbl.lock); - n = __pneigh_lookup(&nd_tbl, &init_net, addr, dev); - if (n != NULL) - *is_router = (n->flags & NTF_ROUTER); + n = __pneigh_lookup(&nd_tbl, dev_net(dev), pkey, dev); + if (n) + ret = !!(n->flags & NTF_ROUTER); read_unlock_bh(&nd_tbl.lock); - return n; + return ret; } static void ndisc_recv_ns(struct sk_buff *skb) @@ -703,10 +692,9 @@ static void ndisc_recv_ns(struct sk_buff *skb) struct inet6_ifaddr *ifp; struct inet6_dev *idev = NULL; struct neighbour *neigh; - struct pneigh_entry *pneigh = NULL; int dad = ipv6_addr_any(saddr); int inc; - int is_router = 0; + int is_router = -1; if (ipv6_addr_is_multicast(&msg->target)) { ND_PRINTK2(KERN_WARNING @@ -756,7 +744,8 @@ static void ndisc_recv_ns(struct sk_buff *skb) inc = ipv6_addr_is_multicast(daddr); - if ((ifp = ipv6_get_ifaddr(&init_net, &msg->target, dev, 1)) != NULL) { + ifp = ipv6_get_ifaddr(dev_net(dev), &msg->target, dev, 1); + if (ifp) { if (ifp->flags & (IFA_F_TENTATIVE|IFA_F_OPTIMISTIC)) { if (dad) { @@ -801,11 +790,10 @@ static void ndisc_recv_ns(struct sk_buff *skb) return; } - if (ipv6_chk_acast_addr(dev, &msg->target) || + if (ipv6_chk_acast_addr(dev_net(dev), dev, &msg->target) || (idev->cnf.forwarding && (ipv6_devconf.proxy_ndp || idev->cnf.proxy_ndp) && - (pneigh = pndisc_check_router(dev, &msg->target, - &is_router)) != NULL)) { + (is_router = pndisc_is_router(&msg->target, dev)) >= 0)) { if (!(NEIGH_CB(skb)->flags & LOCALLY_ENQUEUED) && skb->pkt_type != PACKET_HOST && inc != 0 && @@ -826,13 +814,11 @@ static void ndisc_recv_ns(struct sk_buff *skb) goto out; } - is_router = !!(pneigh ? is_router : idev->cnf.forwarding); + if (is_router < 0) + is_router = !!idev->cnf.forwarding; if (dad) { - struct in6_addr maddr; - - ipv6_addr_all_nodes(&maddr); - ndisc_send_na(dev, NULL, &maddr, &msg->target, + ndisc_send_na(dev, NULL, &in6addr_linklocal_allnodes, &msg->target, is_router, 0, (ifp != NULL), 1); goto out; } @@ -914,7 +900,8 @@ static void ndisc_recv_na(struct sk_buff *skb) return; } } - if ((ifp = ipv6_get_ifaddr(&init_net, &msg->target, dev, 1))) { + ifp = ipv6_get_ifaddr(dev_net(dev), &msg->target, dev, 1); + if (ifp) { if (ifp->flags & IFA_F_TENTATIVE) { addrconf_dad_failure(ifp); return; @@ -945,7 +932,7 @@ static void ndisc_recv_na(struct sk_buff *skb) */ if (lladdr && !memcmp(lladdr, dev->dev_addr, dev->addr_len) && ipv6_devconf.forwarding && ipv6_devconf.proxy_ndp && - pneigh_lookup(&nd_tbl, &init_net, &msg->target, dev, 0)) { + pneigh_lookup(&nd_tbl, dev_net(dev), &msg->target, dev, 0)) { /* XXX: idev->cnf.prixy_ndp */ goto out; } @@ -1035,6 +1022,7 @@ static void ndisc_ra_useropt(struct sk_buff *ra, struct nd_opt_hdr *opt) struct sk_buff *skb; struct nlmsghdr *nlh; struct nduseroptmsg *ndmsg; + struct net *net = dev_net(ra->dev); int err; int base_size = NLMSG_ALIGN(sizeof(struct nduseroptmsg) + (opt->nd_opt_len << 3)); @@ -1064,7 +1052,7 @@ static void ndisc_ra_useropt(struct sk_buff *ra, struct nd_opt_hdr *opt) &ipv6_hdr(ra)->saddr); nlmsg_end(skb, nlh); - err = rtnl_notify(skb, &init_net, 0, RTNLGRP_ND_USEROPT, NULL, + err = rtnl_notify(skb, net, 0, RTNLGRP_ND_USEROPT, NULL, GFP_ATOMIC); if (err < 0) goto errout; @@ -1075,7 +1063,7 @@ nla_put_failure: nlmsg_free(skb); err = -EMSGSIZE; errout: - rtnl_set_sk_err(&init_net, RTNLGRP_ND_USEROPT, err); + rtnl_set_sk_err(net, RTNLGRP_ND_USEROPT, err); } static void ndisc_router_discovery(struct sk_buff *skb) @@ -1104,6 +1092,14 @@ static void ndisc_router_discovery(struct sk_buff *skb) return; } +#ifdef CONFIG_IPV6_NDISC_NODETYPE + if (skb->ndisc_nodetype == NDISC_NODETYPE_HOST) { + ND_PRINTK2(KERN_WARNING + "ICMPv6 RA: from host or unauthorized router\n"); + return; + } +#endif + /* * set the RA_RECV flag in the interface */ @@ -1127,6 +1123,12 @@ static void ndisc_router_discovery(struct sk_buff *skb) return; } +#ifdef CONFIG_IPV6_NDISC_NODETYPE + /* skip link-specific parameters from interior routers */ + if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT) + goto skip_linkparms; +#endif + if (in6_dev->if_flags & IF_RS_SENT) { /* * flag that an RA was received after an RS was sent @@ -1178,7 +1180,7 @@ static void ndisc_router_discovery(struct sk_buff *skb) if (rt == NULL) { ND_PRINTK0(KERN_ERR "ICMPv6 RA: %s() failed to add default route.\n", - __FUNCTION__); + __func__); in6_dev_put(in6_dev); return; } @@ -1187,7 +1189,7 @@ static void ndisc_router_discovery(struct sk_buff *skb) if (neigh == NULL) { ND_PRINTK0(KERN_ERR "ICMPv6 RA: %s() got default router without neighbour.\n", - __FUNCTION__); + __func__); dst_release(&rt->u.dst); in6_dev_put(in6_dev); return; @@ -1241,6 +1243,10 @@ skip_defrtr: } } +#ifdef CONFIG_IPV6_NDISC_NODETYPE +skip_linkparms: +#endif + /* * Process options. */ @@ -1272,7 +1278,13 @@ skip_defrtr: for (p = ndopts.nd_opts_ri; p; p = ndisc_next_option(p, ndopts.nd_opts_ri_end)) { - if (((struct route_info *)p)->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen) + struct route_info *ri = (struct route_info *)p; +#ifdef CONFIG_IPV6_NDISC_NODETYPE + if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT && + ri->prefix_len == 0) + continue; +#endif + if (ri->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen) continue; rt6_route_rcv(skb->dev, (u8*)p, (p->nd_opt_len) << 3, &ipv6_hdr(skb)->saddr); @@ -1280,6 +1292,12 @@ skip_defrtr: } #endif +#ifdef CONFIG_IPV6_NDISC_NODETYPE + /* skip link-specific ndopts from interior routers */ + if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT) + goto out; +#endif + if (in6_dev->cnf.accept_ra_pinfo && ndopts.nd_opts_pi) { struct nd_opt_hdr *p; for (p = ndopts.nd_opts_pi; @@ -1343,6 +1361,16 @@ static void ndisc_redirect_rcv(struct sk_buff *skb) int optlen; u8 *lladdr = NULL; +#ifdef CONFIG_IPV6_NDISC_NODETYPE + switch (skb->ndisc_nodetype) { + case NDISC_NODETYPE_HOST: + case NDISC_NODETYPE_NODEFAULT: + ND_PRINTK2(KERN_WARNING + "ICMPv6 Redirect: from host or unauthorized router\n"); + return; + } +#endif + if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) { ND_PRINTK2(KERN_WARNING "ICMPv6 Redirect: source address is not link-local.\n"); @@ -1418,15 +1446,16 @@ static void ndisc_redirect_rcv(struct sk_buff *skb) } void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh, - struct in6_addr *target) + const struct in6_addr *target) { - struct sock *sk = ndisc_socket->sk; + struct net_device *dev = skb->dev; + struct net *net = dev_net(dev); + struct sock *sk = net->ipv6.ndisc_sk; int len = sizeof(struct icmp6hdr) + 2 * sizeof(struct in6_addr); struct sk_buff *buff; struct icmp6hdr *icmph; struct in6_addr saddr_buf; struct in6_addr *addrp; - struct net_device *dev; struct rt6_info *rt; struct dst_entry *dst; struct inet6_dev *idev; @@ -1436,8 +1465,6 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh, int err; u8 ha_buf[MAX_ADDR_LEN], *ha = NULL; - dev = skb->dev; - if (ipv6_get_lladdr(dev, &saddr_buf, IFA_F_TENTATIVE)) { ND_PRINTK2(KERN_WARNING "ICMPv6 Redirect: no link-local address on %s\n", @@ -1452,10 +1479,10 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh, return; } - ndisc_flow_init(&fl, NDISC_REDIRECT, &saddr_buf, &ipv6_hdr(skb)->saddr, - dev->ifindex); + icmpv6_flow_init(sk, &fl, NDISC_REDIRECT, + &saddr_buf, &ipv6_hdr(skb)->saddr, dev->ifindex); - dst = ip6_route_output(NULL, &fl); + dst = ip6_route_output(net, NULL, &fl); if (dst == NULL) return; @@ -1499,12 +1526,11 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh, if (buff == NULL) { ND_PRINTK0(KERN_ERR "ICMPv6 Redirect: %s() failed to allocate an skb.\n", - __FUNCTION__); + __func__); dst_release(dst); return; } - skb_reserve(buff, LL_RESERVED_SPACE(dev)); ip6_nd_hdr(sk, buff, dev, &saddr_buf, &ipv6_hdr(skb)->saddr, IPPROTO_ICMPV6, len); @@ -1625,18 +1651,16 @@ int ndisc_rcv(struct sk_buff *skb) static int ndisc_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) { struct net_device *dev = ptr; - - if (dev->nd_net != &init_net) - return NOTIFY_DONE; + struct net *net = dev_net(dev); switch (event) { case NETDEV_CHANGEADDR: neigh_changeaddr(&nd_tbl, dev); - fib6_run_gc(~0UL); + fib6_run_gc(~0UL, net); break; case NETDEV_DOWN: neigh_ifdown(&nd_tbl, dev); - fib6_run_gc(~0UL); + fib6_run_gc(~0UL, net); break; default: break; @@ -1745,44 +1769,74 @@ static int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl, int __user *name, #endif -int __init ndisc_init(struct net_proto_family *ops) +static int ndisc_net_init(struct net *net) { struct ipv6_pinfo *np; struct sock *sk; int err; - err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &ndisc_socket); + err = inet_ctl_sock_create(&sk, PF_INET6, + SOCK_RAW, IPPROTO_ICMPV6, net); if (err < 0) { ND_PRINTK0(KERN_ERR "ICMPv6 NDISC: Failed to initialize the control socket (err %d).\n", err); - ndisc_socket = NULL; /* For safety. */ return err; } - sk = ndisc_socket->sk; + net->ipv6.ndisc_sk = sk; + np = inet6_sk(sk); - sk->sk_allocation = GFP_ATOMIC; np->hop_limit = 255; /* Do not loopback ndisc messages */ np->mc_loop = 0; - sk->sk_prot->unhash(sk); + return 0; +} + +static void ndisc_net_exit(struct net *net) +{ + inet_ctl_sock_destroy(net->ipv6.ndisc_sk); +} + +static struct pernet_operations ndisc_net_ops = { + .init = ndisc_net_init, + .exit = ndisc_net_exit, +}; + +int __init ndisc_init(void) +{ + int err; + + err = register_pernet_subsys(&ndisc_net_ops); + if (err) + return err; /* * Initialize the neighbour table */ - neigh_table_init(&nd_tbl); #ifdef CONFIG_SYSCTL - neigh_sysctl_register(NULL, &nd_tbl.parms, NET_IPV6, NET_IPV6_NEIGH, - "ipv6", - &ndisc_ifinfo_sysctl_change, - &ndisc_ifinfo_sysctl_strategy); + err = neigh_sysctl_register(NULL, &nd_tbl.parms, NET_IPV6, + NET_IPV6_NEIGH, "ipv6", + &ndisc_ifinfo_sysctl_change, + &ndisc_ifinfo_sysctl_strategy); + if (err) + goto out_unregister_pernet; #endif + err = register_netdevice_notifier(&ndisc_netdev_notifier); + if (err) + goto out_unregister_sysctl; +out: + return err; - register_netdevice_notifier(&ndisc_netdev_notifier); - return 0; +out_unregister_sysctl: +#ifdef CONFIG_SYSCTL + neigh_sysctl_unregister(&nd_tbl.parms); +out_unregister_pernet: +#endif + unregister_pernet_subsys(&ndisc_net_ops); + goto out; } void ndisc_cleanup(void) @@ -1792,6 +1846,5 @@ void ndisc_cleanup(void) neigh_sysctl_unregister(&nd_tbl.parms); #endif neigh_table_clear(&nd_tbl); - sock_release(ndisc_socket); - ndisc_socket = NULL; /* For safety. */ + unregister_pernet_subsys(&ndisc_net_ops); } |