11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * common UDP/RAW code 31da177e4SLinus Torvalds * Linux INET6 implementation 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Authors: 61da177e4SLinus Torvalds * Pedro Roque <roque@di.fc.ul.pt> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 91da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 101da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 111da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 121da177e4SLinus Torvalds */ 131da177e4SLinus Torvalds 144fc268d2SRandy Dunlap #include <linux/capability.h> 151da177e4SLinus Torvalds #include <linux/errno.h> 161da177e4SLinus Torvalds #include <linux/types.h> 171da177e4SLinus Torvalds #include <linux/kernel.h> 181da177e4SLinus Torvalds #include <linux/interrupt.h> 191da177e4SLinus Torvalds #include <linux/socket.h> 201da177e4SLinus Torvalds #include <linux/sockios.h> 211da177e4SLinus Torvalds #include <linux/in6.h> 221da177e4SLinus Torvalds #include <linux/ipv6.h> 231da177e4SLinus Torvalds #include <linux/route.h> 245a0e3ad6STejun Heo #include <linux/slab.h> 25a495f836SChris Elston #include <linux/export.h> 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds #include <net/ipv6.h> 281da177e4SLinus Torvalds #include <net/ndisc.h> 291da177e4SLinus Torvalds #include <net/addrconf.h> 301da177e4SLinus Torvalds #include <net/transp_v6.h> 311da177e4SLinus Torvalds #include <net/ip6_route.h> 32c752f073SArnaldo Carvalho de Melo #include <net/tcp_states.h> 33e7219858SYOSHIFUJI Hideaki / 吉藤英明 #include <net/dsfield.h> 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds #include <linux/errqueue.h> 367c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 371da177e4SLinus Torvalds 38a50feda5SEric Dumazet static bool ipv6_mapped_addr_any(const struct in6_addr *a) 39c15fea2dSMax Matveev { 40a50feda5SEric Dumazet return ipv6_addr_v4mapped(a) && (a->s6_addr32[3] == 0); 41c15fea2dSMax Matveev } 42c15fea2dSMax Matveev 4380fbdb20SMartin KaFai Lau static void ip6_datagram_flow_key_init(struct flowi6 *fl6, struct sock *sk) 4480fbdb20SMartin KaFai Lau { 4580fbdb20SMartin KaFai Lau struct inet_sock *inet = inet_sk(sk); 4680fbdb20SMartin KaFai Lau struct ipv6_pinfo *np = inet6_sk(sk); 4780fbdb20SMartin KaFai Lau 4880fbdb20SMartin KaFai Lau memset(fl6, 0, sizeof(*fl6)); 4980fbdb20SMartin KaFai Lau fl6->flowi6_proto = sk->sk_protocol; 5080fbdb20SMartin KaFai Lau fl6->daddr = sk->sk_v6_daddr; 5180fbdb20SMartin KaFai Lau fl6->saddr = np->saddr; 5280fbdb20SMartin KaFai Lau fl6->flowi6_oif = sk->sk_bound_dev_if; 5380fbdb20SMartin KaFai Lau fl6->flowi6_mark = sk->sk_mark; 5480fbdb20SMartin KaFai Lau fl6->fl6_dport = inet->inet_dport; 5580fbdb20SMartin KaFai Lau fl6->fl6_sport = inet->inet_sport; 5680fbdb20SMartin KaFai Lau fl6->flowlabel = np->flow_label; 57e2d118a1SLorenzo Colitti fl6->flowi6_uid = sk->sk_uid; 5880fbdb20SMartin KaFai Lau 5980fbdb20SMartin KaFai Lau if (!fl6->flowi6_oif) 6080fbdb20SMartin KaFai Lau fl6->flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; 6180fbdb20SMartin KaFai Lau 6280fbdb20SMartin KaFai Lau if (!fl6->flowi6_oif && ipv6_addr_is_multicast(&fl6->daddr)) 6380fbdb20SMartin KaFai Lau fl6->flowi6_oif = np->mcast_oif; 6480fbdb20SMartin KaFai Lau 6580fbdb20SMartin KaFai Lau security_sk_classify_flow(sk, flowi6_to_flowi(fl6)); 6680fbdb20SMartin KaFai Lau } 6780fbdb20SMartin KaFai Lau 6833c162a9SMartin KaFai Lau int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr) 697e2040dbSMartin KaFai Lau { 707e2040dbSMartin KaFai Lau struct ip6_flowlabel *flowlabel = NULL; 717e2040dbSMartin KaFai Lau struct in6_addr *final_p, final; 727e2040dbSMartin KaFai Lau struct ipv6_txoptions *opt; 737e2040dbSMartin KaFai Lau struct dst_entry *dst; 747e2040dbSMartin KaFai Lau struct inet_sock *inet = inet_sk(sk); 757e2040dbSMartin KaFai Lau struct ipv6_pinfo *np = inet6_sk(sk); 767e2040dbSMartin KaFai Lau struct flowi6 fl6; 777e2040dbSMartin KaFai Lau int err = 0; 787e2040dbSMartin KaFai Lau 797e2040dbSMartin KaFai Lau if (np->sndflow && (np->flow_label & IPV6_FLOWLABEL_MASK)) { 807e2040dbSMartin KaFai Lau flowlabel = fl6_sock_lookup(sk, np->flow_label); 817e2040dbSMartin KaFai Lau if (!flowlabel) 827e2040dbSMartin KaFai Lau return -EINVAL; 837e2040dbSMartin KaFai Lau } 847e2040dbSMartin KaFai Lau ip6_datagram_flow_key_init(&fl6, sk); 857e2040dbSMartin KaFai Lau 867e2040dbSMartin KaFai Lau rcu_read_lock(); 877e2040dbSMartin KaFai Lau opt = flowlabel ? flowlabel->opt : rcu_dereference(np->opt); 887e2040dbSMartin KaFai Lau final_p = fl6_update_dst(&fl6, opt, &final); 897e2040dbSMartin KaFai Lau rcu_read_unlock(); 907e2040dbSMartin KaFai Lau 917e2040dbSMartin KaFai Lau dst = ip6_dst_lookup_flow(sk, &fl6, final_p); 927e2040dbSMartin KaFai Lau if (IS_ERR(dst)) { 937e2040dbSMartin KaFai Lau err = PTR_ERR(dst); 947e2040dbSMartin KaFai Lau goto out; 957e2040dbSMartin KaFai Lau } 967e2040dbSMartin KaFai Lau 9733c162a9SMartin KaFai Lau if (fix_sk_saddr) { 987e2040dbSMartin KaFai Lau if (ipv6_addr_any(&np->saddr)) 997e2040dbSMartin KaFai Lau np->saddr = fl6.saddr; 1007e2040dbSMartin KaFai Lau 1017e2040dbSMartin KaFai Lau if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { 1027e2040dbSMartin KaFai Lau sk->sk_v6_rcv_saddr = fl6.saddr; 1037e2040dbSMartin KaFai Lau inet->inet_rcv_saddr = LOOPBACK4_IPV6; 1047e2040dbSMartin KaFai Lau if (sk->sk_prot->rehash) 1057e2040dbSMartin KaFai Lau sk->sk_prot->rehash(sk); 1067e2040dbSMartin KaFai Lau } 10733c162a9SMartin KaFai Lau } 1087e2040dbSMartin KaFai Lau 1097e2040dbSMartin KaFai Lau ip6_dst_store(sk, dst, 1107e2040dbSMartin KaFai Lau ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ? 1117e2040dbSMartin KaFai Lau &sk->sk_v6_daddr : NULL, 1127e2040dbSMartin KaFai Lau #ifdef CONFIG_IPV6_SUBTREES 1137e2040dbSMartin KaFai Lau ipv6_addr_equal(&fl6.saddr, &np->saddr) ? 1147e2040dbSMartin KaFai Lau &np->saddr : 1157e2040dbSMartin KaFai Lau #endif 1167e2040dbSMartin KaFai Lau NULL); 1177e2040dbSMartin KaFai Lau 1187e2040dbSMartin KaFai Lau out: 1197e2040dbSMartin KaFai Lau fl6_sock_release(flowlabel); 1207e2040dbSMartin KaFai Lau return err; 1217e2040dbSMartin KaFai Lau } 1227e2040dbSMartin KaFai Lau 123e646b657SMartin KaFai Lau void ip6_datagram_release_cb(struct sock *sk) 124e646b657SMartin KaFai Lau { 125e646b657SMartin KaFai Lau struct dst_entry *dst; 126e646b657SMartin KaFai Lau 127e646b657SMartin KaFai Lau if (ipv6_addr_v4mapped(&sk->sk_v6_daddr)) 128e646b657SMartin KaFai Lau return; 129e646b657SMartin KaFai Lau 130e646b657SMartin KaFai Lau rcu_read_lock(); 131e646b657SMartin KaFai Lau dst = __sk_dst_get(sk); 132e646b657SMartin KaFai Lau if (!dst || !dst->obsolete || 133e646b657SMartin KaFai Lau dst->ops->check(dst, inet6_sk(sk)->dst_cookie)) { 134e646b657SMartin KaFai Lau rcu_read_unlock(); 135e646b657SMartin KaFai Lau return; 136e646b657SMartin KaFai Lau } 137e646b657SMartin KaFai Lau rcu_read_unlock(); 138e646b657SMartin KaFai Lau 139e646b657SMartin KaFai Lau ip6_datagram_dst_update(sk, false); 140e646b657SMartin KaFai Lau } 141e646b657SMartin KaFai Lau EXPORT_SYMBOL_GPL(ip6_datagram_release_cb); 142e646b657SMartin KaFai Lau 1430382a25aSGuillaume Nault int __ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, 1440382a25aSGuillaume Nault int addr_len) 1451da177e4SLinus Torvalds { 1461da177e4SLinus Torvalds struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr; 1471da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 1481da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 1492f987a76SPaolo Abeni struct in6_addr *daddr, old_daddr; 1502f987a76SPaolo Abeni __be32 fl6_flowlabel = 0; 1512f987a76SPaolo Abeni __be32 old_fl6_flowlabel; 1525f2fb802SStefano Brivio __be16 old_dport; 1531da177e4SLinus Torvalds int addr_type; 1541da177e4SLinus Torvalds int err; 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds if (usin->sin6_family == AF_INET) { 1571da177e4SLinus Torvalds if (__ipv6_only_sock(sk)) 1581da177e4SLinus Torvalds return -EAFNOSUPPORT; 15903645a11SEric Dumazet err = __ip4_datagram_connect(sk, uaddr, addr_len); 1601da177e4SLinus Torvalds goto ipv4_connected; 1611da177e4SLinus Torvalds } 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133) 1641da177e4SLinus Torvalds return -EINVAL; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds if (usin->sin6_family != AF_INET6) 1671da177e4SLinus Torvalds return -EAFNOSUPPORT; 1681da177e4SLinus Torvalds 1697e2040dbSMartin KaFai Lau if (np->sndflow) 17080fbdb20SMartin KaFai Lau fl6_flowlabel = usin->sin6_flowinfo & IPV6_FLOWINFO_MASK; 1711da177e4SLinus Torvalds 172052d2369SJonathan T. Leighton if (ipv6_addr_any(&usin->sin6_addr)) { 1731da177e4SLinus Torvalds /* 1741da177e4SLinus Torvalds * connect to self 1751da177e4SLinus Torvalds */ 176052d2369SJonathan T. Leighton if (ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr)) 177052d2369SJonathan T. Leighton ipv6_addr_set_v4mapped(htonl(INADDR_LOOPBACK), 178052d2369SJonathan T. Leighton &usin->sin6_addr); 179052d2369SJonathan T. Leighton else 180052d2369SJonathan T. Leighton usin->sin6_addr = in6addr_loopback; 1811da177e4SLinus Torvalds } 1821da177e4SLinus Torvalds 183052d2369SJonathan T. Leighton addr_type = ipv6_addr_type(&usin->sin6_addr); 184052d2369SJonathan T. Leighton 1851da177e4SLinus Torvalds daddr = &usin->sin6_addr; 1861da177e4SLinus Torvalds 187052d2369SJonathan T. Leighton if (addr_type & IPV6_ADDR_MAPPED) { 1881da177e4SLinus Torvalds struct sockaddr_in sin; 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds if (__ipv6_only_sock(sk)) { 1911da177e4SLinus Torvalds err = -ENETUNREACH; 1921da177e4SLinus Torvalds goto out; 1931da177e4SLinus Torvalds } 1941da177e4SLinus Torvalds sin.sin_family = AF_INET; 1951da177e4SLinus Torvalds sin.sin_addr.s_addr = daddr->s6_addr32[3]; 1961da177e4SLinus Torvalds sin.sin_port = usin->sin6_port; 1971da177e4SLinus Torvalds 19803645a11SEric Dumazet err = __ip4_datagram_connect(sk, 1991da177e4SLinus Torvalds (struct sockaddr *) &sin, 2001da177e4SLinus Torvalds sizeof(sin)); 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds ipv4_connected: 2031da177e4SLinus Torvalds if (err) 2041da177e4SLinus Torvalds goto out; 2051da177e4SLinus Torvalds 206efe4208fSEric Dumazet ipv6_addr_set_v4mapped(inet->inet_daddr, &sk->sk_v6_daddr); 2071da177e4SLinus Torvalds 208c15fea2dSMax Matveev if (ipv6_addr_any(&np->saddr) || 209c15fea2dSMax Matveev ipv6_mapped_addr_any(&np->saddr)) 210c720c7e8SEric Dumazet ipv6_addr_set_v4mapped(inet->inet_saddr, &np->saddr); 2111da177e4SLinus Torvalds 212efe4208fSEric Dumazet if (ipv6_addr_any(&sk->sk_v6_rcv_saddr) || 213efe4208fSEric Dumazet ipv6_mapped_addr_any(&sk->sk_v6_rcv_saddr)) { 214c720c7e8SEric Dumazet ipv6_addr_set_v4mapped(inet->inet_rcv_saddr, 215efe4208fSEric Dumazet &sk->sk_v6_rcv_saddr); 216719f8358SEric Dumazet if (sk->sk_prot->rehash) 217719f8358SEric Dumazet sk->sk_prot->rehash(sk); 218719f8358SEric Dumazet } 219b301e82cSBrian Haley 2201da177e4SLinus Torvalds goto out; 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds 223842df073SHannes Frederic Sowa if (__ipv6_addr_needs_scope_id(addr_type)) { 2241da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) && 2251da177e4SLinus Torvalds usin->sin6_scope_id) { 22654dc3e33SDavid Ahern if (!sk_dev_equal_l3scope(sk, usin->sin6_scope_id)) { 2271da177e4SLinus Torvalds err = -EINVAL; 2281da177e4SLinus Torvalds goto out; 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds sk->sk_bound_dev_if = usin->sin6_scope_id; 2311da177e4SLinus Torvalds } 2321da177e4SLinus Torvalds 2331ac4f008SBrian Haley if (!sk->sk_bound_dev_if && (addr_type & IPV6_ADDR_MULTICAST)) 2341ac4f008SBrian Haley sk->sk_bound_dev_if = np->mcast_oif; 2351ac4f008SBrian Haley 2361da177e4SLinus Torvalds /* Connect to link-local address requires an interface */ 2371da177e4SLinus Torvalds if (!sk->sk_bound_dev_if) { 2381da177e4SLinus Torvalds err = -EINVAL; 2391da177e4SLinus Torvalds goto out; 2401da177e4SLinus Torvalds } 2411da177e4SLinus Torvalds } 2421da177e4SLinus Torvalds 2432f987a76SPaolo Abeni /* save the current peer information before updating it */ 2442f987a76SPaolo Abeni old_daddr = sk->sk_v6_daddr; 2452f987a76SPaolo Abeni old_fl6_flowlabel = np->flow_label; 2462f987a76SPaolo Abeni old_dport = inet->inet_dport; 2472f987a76SPaolo Abeni 248efe4208fSEric Dumazet sk->sk_v6_daddr = *daddr; 24980fbdb20SMartin KaFai Lau np->flow_label = fl6_flowlabel; 250c720c7e8SEric Dumazet inet->inet_dport = usin->sin6_port; 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds /* 2531da177e4SLinus Torvalds * Check for a route to destination an obtain the 2541da177e4SLinus Torvalds * destination cache for it. 2551da177e4SLinus Torvalds */ 2561da177e4SLinus Torvalds 25733c162a9SMartin KaFai Lau err = ip6_datagram_dst_update(sk, true); 25885cb73ffSWei Wang if (err) { 2592f987a76SPaolo Abeni /* Restore the socket peer info, to keep it consistent with 2602f987a76SPaolo Abeni * the old socket state 26185cb73ffSWei Wang */ 2622f987a76SPaolo Abeni sk->sk_v6_daddr = old_daddr; 2632f987a76SPaolo Abeni np->flow_label = old_fl6_flowlabel; 2642f987a76SPaolo Abeni inet->inet_dport = old_dport; 2651da177e4SLinus Torvalds goto out; 26685cb73ffSWei Wang } 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds sk->sk_state = TCP_ESTABLISHED; 269877d1f62STom Herbert sk_set_txhash(sk); 2701da177e4SLinus Torvalds out: 2711da177e4SLinus Torvalds return err; 2721da177e4SLinus Torvalds } 2730382a25aSGuillaume Nault EXPORT_SYMBOL_GPL(__ip6_datagram_connect); 27403645a11SEric Dumazet 27503645a11SEric Dumazet int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) 27603645a11SEric Dumazet { 27703645a11SEric Dumazet int res; 27803645a11SEric Dumazet 27903645a11SEric Dumazet lock_sock(sk); 28003645a11SEric Dumazet res = __ip6_datagram_connect(sk, uaddr, addr_len); 28103645a11SEric Dumazet release_sock(sk); 28203645a11SEric Dumazet return res; 28303645a11SEric Dumazet } 284a495f836SChris Elston EXPORT_SYMBOL_GPL(ip6_datagram_connect); 2851da177e4SLinus Torvalds 28682b276cdSHannes Frederic Sowa int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *uaddr, 28782b276cdSHannes Frederic Sowa int addr_len) 28882b276cdSHannes Frederic Sowa { 28982b276cdSHannes Frederic Sowa DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, uaddr); 29082b276cdSHannes Frederic Sowa if (sin6->sin6_family != AF_INET6) 29182b276cdSHannes Frederic Sowa return -EAFNOSUPPORT; 29282b276cdSHannes Frederic Sowa return ip6_datagram_connect(sk, uaddr, addr_len); 29382b276cdSHannes Frederic Sowa } 29482b276cdSHannes Frederic Sowa EXPORT_SYMBOL_GPL(ip6_datagram_connect_v6_only); 29582b276cdSHannes Frederic Sowa 2961da177e4SLinus Torvalds void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, 297e69a4adcSAl Viro __be16 port, u32 info, u8 *payload) 2981da177e4SLinus Torvalds { 2991da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 300cc70ab26SArnaldo Carvalho de Melo struct icmp6hdr *icmph = icmp6_hdr(skb); 3011da177e4SLinus Torvalds struct sock_exterr_skb *serr; 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds if (!np->recverr) 3041da177e4SLinus Torvalds return; 3051da177e4SLinus Torvalds 3061da177e4SLinus Torvalds skb = skb_clone(skb, GFP_ATOMIC); 3071da177e4SLinus Torvalds if (!skb) 3081da177e4SLinus Torvalds return; 3091da177e4SLinus Torvalds 310d40a4de0SBrian Haley skb->protocol = htons(ETH_P_IPV6); 311d40a4de0SBrian Haley 3121da177e4SLinus Torvalds serr = SKB_EXT_ERR(skb); 3131da177e4SLinus Torvalds serr->ee.ee_errno = err; 3141da177e4SLinus Torvalds serr->ee.ee_origin = SO_EE_ORIGIN_ICMP6; 3151da177e4SLinus Torvalds serr->ee.ee_type = icmph->icmp6_type; 3161da177e4SLinus Torvalds serr->ee.ee_code = icmph->icmp6_code; 3171da177e4SLinus Torvalds serr->ee.ee_pad = 0; 3181da177e4SLinus Torvalds serr->ee.ee_info = info; 3191da177e4SLinus Torvalds serr->ee.ee_data = 0; 320d56f90a7SArnaldo Carvalho de Melo serr->addr_offset = (u8 *)&(((struct ipv6hdr *)(icmph + 1))->daddr) - 321d56f90a7SArnaldo Carvalho de Melo skb_network_header(skb); 3221da177e4SLinus Torvalds serr->port = port; 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds __skb_pull(skb, payload - skb->data); 325bd82393cSArnaldo Carvalho de Melo skb_reset_transport_header(skb); 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds if (sock_queue_err_skb(sk, skb)) 3281da177e4SLinus Torvalds kfree_skb(skb); 3291da177e4SLinus Torvalds } 3301da177e4SLinus Torvalds 3314c9483b2SDavid S. Miller void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info) 3321da177e4SLinus Torvalds { 3331c1e9d2bSEric Dumazet const struct ipv6_pinfo *np = inet6_sk(sk); 3341da177e4SLinus Torvalds struct sock_exterr_skb *serr; 3351da177e4SLinus Torvalds struct ipv6hdr *iph; 3361da177e4SLinus Torvalds struct sk_buff *skb; 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds if (!np->recverr) 3391da177e4SLinus Torvalds return; 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); 3421da177e4SLinus Torvalds if (!skb) 3431da177e4SLinus Torvalds return; 3441da177e4SLinus Torvalds 345d40a4de0SBrian Haley skb->protocol = htons(ETH_P_IPV6); 346d40a4de0SBrian Haley 3471ced98e8SArnaldo Carvalho de Melo skb_put(skb, sizeof(struct ipv6hdr)); 3481ced98e8SArnaldo Carvalho de Melo skb_reset_network_header(skb); 3490660e03fSArnaldo Carvalho de Melo iph = ipv6_hdr(skb); 3504e3fd7a0SAlexey Dobriyan iph->daddr = fl6->daddr; 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds serr = SKB_EXT_ERR(skb); 3531da177e4SLinus Torvalds serr->ee.ee_errno = err; 3541da177e4SLinus Torvalds serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL; 3551da177e4SLinus Torvalds serr->ee.ee_type = 0; 3561da177e4SLinus Torvalds serr->ee.ee_code = 0; 3571da177e4SLinus Torvalds serr->ee.ee_pad = 0; 3581da177e4SLinus Torvalds serr->ee.ee_info = info; 3591da177e4SLinus Torvalds serr->ee.ee_data = 0; 360d56f90a7SArnaldo Carvalho de Melo serr->addr_offset = (u8 *)&iph->daddr - skb_network_header(skb); 3611958b856SDavid S. Miller serr->port = fl6->fl6_dport; 3621da177e4SLinus Torvalds 36327a884dcSArnaldo Carvalho de Melo __skb_pull(skb, skb_tail_pointer(skb) - skb->data); 364bd82393cSArnaldo Carvalho de Melo skb_reset_transport_header(skb); 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds if (sock_queue_err_skb(sk, skb)) 3671da177e4SLinus Torvalds kfree_skb(skb); 3681da177e4SLinus Torvalds } 3691da177e4SLinus Torvalds 3704c9483b2SDavid S. Miller void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu) 3714b340ae2SBrian Haley { 3724b340ae2SBrian Haley struct ipv6_pinfo *np = inet6_sk(sk); 3734b340ae2SBrian Haley struct ipv6hdr *iph; 3744b340ae2SBrian Haley struct sk_buff *skb; 3754b340ae2SBrian Haley struct ip6_mtuinfo *mtu_info; 3764b340ae2SBrian Haley 3774b340ae2SBrian Haley if (!np->rxopt.bits.rxpmtu) 3784b340ae2SBrian Haley return; 3794b340ae2SBrian Haley 3804b340ae2SBrian Haley skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); 3814b340ae2SBrian Haley if (!skb) 3824b340ae2SBrian Haley return; 3834b340ae2SBrian Haley 3844b340ae2SBrian Haley skb_put(skb, sizeof(struct ipv6hdr)); 3854b340ae2SBrian Haley skb_reset_network_header(skb); 3864b340ae2SBrian Haley iph = ipv6_hdr(skb); 3874e3fd7a0SAlexey Dobriyan iph->daddr = fl6->daddr; 3884b340ae2SBrian Haley 3894b340ae2SBrian Haley mtu_info = IP6CBMTU(skb); 3904b340ae2SBrian Haley 3914b340ae2SBrian Haley mtu_info->ip6m_mtu = mtu; 3924b340ae2SBrian Haley mtu_info->ip6m_addr.sin6_family = AF_INET6; 3934b340ae2SBrian Haley mtu_info->ip6m_addr.sin6_port = 0; 3944b340ae2SBrian Haley mtu_info->ip6m_addr.sin6_flowinfo = 0; 3954c9483b2SDavid S. Miller mtu_info->ip6m_addr.sin6_scope_id = fl6->flowi6_oif; 3964e3fd7a0SAlexey Dobriyan mtu_info->ip6m_addr.sin6_addr = ipv6_hdr(skb)->daddr; 3974b340ae2SBrian Haley 3984b340ae2SBrian Haley __skb_pull(skb, skb_tail_pointer(skb) - skb->data); 3994b340ae2SBrian Haley skb_reset_transport_header(skb); 4004b340ae2SBrian Haley 4014b340ae2SBrian Haley skb = xchg(&np->rxpmtu, skb); 4024b340ae2SBrian Haley kfree_skb(skb); 4034b340ae2SBrian Haley } 4044b340ae2SBrian Haley 40534b99df4SJulian Anastasov /* For some errors we have valid addr_offset even with zero payload and 40634b99df4SJulian Anastasov * zero port. Also, addr_offset should be supported if port is set. 40734b99df4SJulian Anastasov */ 40834b99df4SJulian Anastasov static inline bool ipv6_datagram_support_addr(struct sock_exterr_skb *serr) 40934b99df4SJulian Anastasov { 41034b99df4SJulian Anastasov return serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6 || 41134b99df4SJulian Anastasov serr->ee.ee_origin == SO_EE_ORIGIN_ICMP || 41234b99df4SJulian Anastasov serr->ee.ee_origin == SO_EE_ORIGIN_LOCAL || serr->port; 41334b99df4SJulian Anastasov } 41434b99df4SJulian Anastasov 415c247f053SWillem de Bruijn /* IPv6 supports cmsg on all origins aside from SO_EE_ORIGIN_LOCAL. 416c247f053SWillem de Bruijn * 417c247f053SWillem de Bruijn * At one point, excluding local errors was a quick test to identify icmp/icmp6 418c247f053SWillem de Bruijn * errors. This is no longer true, but the test remained, so the v6 stack, 419c247f053SWillem de Bruijn * unlike v4, also honors cmsg requests on all wifi and timestamp errors. 420c247f053SWillem de Bruijn */ 421c247f053SWillem de Bruijn static bool ip6_datagram_support_cmsg(struct sk_buff *skb, 422c247f053SWillem de Bruijn struct sock_exterr_skb *serr) 423829ae9d6SWillem de Bruijn { 424c247f053SWillem de Bruijn if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP || 425c247f053SWillem de Bruijn serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6) 426c247f053SWillem de Bruijn return true; 427c247f053SWillem de Bruijn 428c247f053SWillem de Bruijn if (serr->ee.ee_origin == SO_EE_ORIGIN_LOCAL) 429c247f053SWillem de Bruijn return false; 430c247f053SWillem de Bruijn 4311862d620SWillem de Bruijn if (!IP6CB(skb)->iif) 432c247f053SWillem de Bruijn return false; 433829ae9d6SWillem de Bruijn 434c247f053SWillem de Bruijn return true; 435829ae9d6SWillem de Bruijn } 436829ae9d6SWillem de Bruijn 4371da177e4SLinus Torvalds /* 4381da177e4SLinus Torvalds * Handle MSG_ERRQUEUE 4391da177e4SLinus Torvalds */ 44085fbaa75SHannes Frederic Sowa int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) 4411da177e4SLinus Torvalds { 4421da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 4431da177e4SLinus Torvalds struct sock_exterr_skb *serr; 444364a9e93SWillem de Bruijn struct sk_buff *skb; 445342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin, msg->msg_name); 4461da177e4SLinus Torvalds struct { 4471da177e4SLinus Torvalds struct sock_extended_err ee; 4481da177e4SLinus Torvalds struct sockaddr_in6 offender; 4491da177e4SLinus Torvalds } errhdr; 4501da177e4SLinus Torvalds int err; 4511da177e4SLinus Torvalds int copied; 4521da177e4SLinus Torvalds 4531da177e4SLinus Torvalds err = -EAGAIN; 454364a9e93SWillem de Bruijn skb = sock_dequeue_err_skb(sk); 45563159f29SIan Morris if (!skb) 4561da177e4SLinus Torvalds goto out; 4571da177e4SLinus Torvalds 4581da177e4SLinus Torvalds copied = skb->len; 4591da177e4SLinus Torvalds if (copied > len) { 4601da177e4SLinus Torvalds msg->msg_flags |= MSG_TRUNC; 4611da177e4SLinus Torvalds copied = len; 4621da177e4SLinus Torvalds } 46351f3d02bSDavid S. Miller err = skb_copy_datagram_msg(skb, 0, msg, copied); 464960a2628SEric Dumazet if (unlikely(err)) { 465960a2628SEric Dumazet kfree_skb(skb); 466960a2628SEric Dumazet return err; 467960a2628SEric Dumazet } 4681da177e4SLinus Torvalds sock_recv_timestamp(msg, sk, skb); 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds serr = SKB_EXT_ERR(skb); 4711da177e4SLinus Torvalds 47234b99df4SJulian Anastasov if (sin && ipv6_datagram_support_addr(serr)) { 473d56f90a7SArnaldo Carvalho de Melo const unsigned char *nh = skb_network_header(skb); 4741da177e4SLinus Torvalds sin->sin6_family = AF_INET6; 4751da177e4SLinus Torvalds sin->sin6_flowinfo = 0; 4761da177e4SLinus Torvalds sin->sin6_port = serr->port; 477d40a4de0SBrian Haley if (skb->protocol == htons(ETH_P_IPV6)) { 4786c40d100SYOSHIFUJI Hideaki / 吉藤英明 const struct ipv6hdr *ip6h = container_of((struct in6_addr *)(nh + serr->addr_offset), 4796c40d100SYOSHIFUJI Hideaki / 吉藤英明 struct ipv6hdr, daddr); 4806c40d100SYOSHIFUJI Hideaki / 吉藤英明 sin->sin6_addr = ip6h->daddr; 4811da177e4SLinus Torvalds if (np->sndflow) 4826502ca52SYOSHIFUJI Hideaki / 吉藤英明 sin->sin6_flowinfo = ip6_flowinfo(ip6h); 483842df073SHannes Frederic Sowa sin->sin6_scope_id = 484842df073SHannes Frederic Sowa ipv6_iface_scope_id(&sin->sin6_addr, 485842df073SHannes Frederic Sowa IP6CB(skb)->iif); 4861da177e4SLinus Torvalds } else { 487b301e82cSBrian Haley ipv6_addr_set_v4mapped(*(__be32 *)(nh + serr->addr_offset), 488b301e82cSBrian Haley &sin->sin6_addr); 489842df073SHannes Frederic Sowa sin->sin6_scope_id = 0; 4901da177e4SLinus Torvalds } 49185fbaa75SHannes Frederic Sowa *addr_len = sizeof(*sin); 4921da177e4SLinus Torvalds } 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err)); 4951da177e4SLinus Torvalds sin = &errhdr.offender; 496f812116bSWillem de Bruijn memset(sin, 0, sizeof(*sin)); 497c247f053SWillem de Bruijn 498c247f053SWillem de Bruijn if (ip6_datagram_support_cmsg(skb, serr)) { 4991da177e4SLinus Torvalds sin->sin6_family = AF_INET6; 500c247f053SWillem de Bruijn if (np->rxopt.all) 5014b261c75SHannes Frederic Sowa ip6_datagram_recv_common_ctl(sk, msg, skb); 502d40a4de0SBrian Haley if (skb->protocol == htons(ETH_P_IPV6)) { 5034e3fd7a0SAlexey Dobriyan sin->sin6_addr = ipv6_hdr(skb)->saddr; 5041da177e4SLinus Torvalds if (np->rxopt.all) 5054b261c75SHannes Frederic Sowa ip6_datagram_recv_specific_ctl(sk, msg, skb); 506842df073SHannes Frederic Sowa sin->sin6_scope_id = 507842df073SHannes Frederic Sowa ipv6_iface_scope_id(&sin->sin6_addr, 508842df073SHannes Frederic Sowa IP6CB(skb)->iif); 5091da177e4SLinus Torvalds } else { 510b301e82cSBrian Haley ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, 511b301e82cSBrian Haley &sin->sin6_addr); 512f812116bSWillem de Bruijn if (inet_sk(sk)->cmsg_flags) 5131da177e4SLinus Torvalds ip_cmsg_recv(msg, skb); 5141da177e4SLinus Torvalds } 5151da177e4SLinus Torvalds } 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds put_cmsg(msg, SOL_IPV6, IPV6_RECVERR, sizeof(errhdr), &errhdr); 5181da177e4SLinus Torvalds 5191da177e4SLinus Torvalds /* Now we could try to dump offended packet options */ 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds msg->msg_flags |= MSG_ERRQUEUE; 5221da177e4SLinus Torvalds err = copied; 5231da177e4SLinus Torvalds 524960a2628SEric Dumazet consume_skb(skb); 5251da177e4SLinus Torvalds out: 5261da177e4SLinus Torvalds return err; 5271da177e4SLinus Torvalds } 528a495f836SChris Elston EXPORT_SYMBOL_GPL(ipv6_recv_error); 5291da177e4SLinus Torvalds 5304b340ae2SBrian Haley /* 5314b340ae2SBrian Haley * Handle IPV6_RECVPATHMTU 5324b340ae2SBrian Haley */ 53385fbaa75SHannes Frederic Sowa int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len, 53485fbaa75SHannes Frederic Sowa int *addr_len) 5354b340ae2SBrian Haley { 5364b340ae2SBrian Haley struct ipv6_pinfo *np = inet6_sk(sk); 5374b340ae2SBrian Haley struct sk_buff *skb; 5384b340ae2SBrian Haley struct ip6_mtuinfo mtu_info; 539342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin, msg->msg_name); 5404b340ae2SBrian Haley int err; 5414b340ae2SBrian Haley int copied; 5424b340ae2SBrian Haley 5434b340ae2SBrian Haley err = -EAGAIN; 5444b340ae2SBrian Haley skb = xchg(&np->rxpmtu, NULL); 54563159f29SIan Morris if (!skb) 5464b340ae2SBrian Haley goto out; 5474b340ae2SBrian Haley 5484b340ae2SBrian Haley copied = skb->len; 5494b340ae2SBrian Haley if (copied > len) { 5504b340ae2SBrian Haley msg->msg_flags |= MSG_TRUNC; 5514b340ae2SBrian Haley copied = len; 5524b340ae2SBrian Haley } 55351f3d02bSDavid S. Miller err = skb_copy_datagram_msg(skb, 0, msg, copied); 5544b340ae2SBrian Haley if (err) 5554b340ae2SBrian Haley goto out_free_skb; 5564b340ae2SBrian Haley 5574b340ae2SBrian Haley sock_recv_timestamp(msg, sk, skb); 5584b340ae2SBrian Haley 5594b340ae2SBrian Haley memcpy(&mtu_info, IP6CBMTU(skb), sizeof(mtu_info)); 5604b340ae2SBrian Haley 5614b340ae2SBrian Haley if (sin) { 5624b340ae2SBrian Haley sin->sin6_family = AF_INET6; 5634b340ae2SBrian Haley sin->sin6_flowinfo = 0; 5644b340ae2SBrian Haley sin->sin6_port = 0; 5654b340ae2SBrian Haley sin->sin6_scope_id = mtu_info.ip6m_addr.sin6_scope_id; 5664e3fd7a0SAlexey Dobriyan sin->sin6_addr = mtu_info.ip6m_addr.sin6_addr; 56785fbaa75SHannes Frederic Sowa *addr_len = sizeof(*sin); 5684b340ae2SBrian Haley } 5694b340ae2SBrian Haley 5704b340ae2SBrian Haley put_cmsg(msg, SOL_IPV6, IPV6_PATHMTU, sizeof(mtu_info), &mtu_info); 5714b340ae2SBrian Haley 5724b340ae2SBrian Haley err = copied; 5734b340ae2SBrian Haley 5744b340ae2SBrian Haley out_free_skb: 5754b340ae2SBrian Haley kfree_skb(skb); 5764b340ae2SBrian Haley out: 5774b340ae2SBrian Haley return err; 5784b340ae2SBrian Haley } 5791da177e4SLinus Torvalds 5801da177e4SLinus Torvalds 5814b261c75SHannes Frederic Sowa void ip6_datagram_recv_common_ctl(struct sock *sk, struct msghdr *msg, 5824b261c75SHannes Frederic Sowa struct sk_buff *skb) 5834b261c75SHannes Frederic Sowa { 5844b261c75SHannes Frederic Sowa struct ipv6_pinfo *np = inet6_sk(sk); 5854b261c75SHannes Frederic Sowa bool is_ipv6 = skb->protocol == htons(ETH_P_IPV6); 5864b261c75SHannes Frederic Sowa 5874b261c75SHannes Frederic Sowa if (np->rxopt.bits.rxinfo) { 5884b261c75SHannes Frederic Sowa struct in6_pktinfo src_info; 5894b261c75SHannes Frederic Sowa 5904b261c75SHannes Frederic Sowa if (is_ipv6) { 5914b261c75SHannes Frederic Sowa src_info.ipi6_ifindex = IP6CB(skb)->iif; 5924b261c75SHannes Frederic Sowa src_info.ipi6_addr = ipv6_hdr(skb)->daddr; 5934b261c75SHannes Frederic Sowa } else { 5944b261c75SHannes Frederic Sowa src_info.ipi6_ifindex = 5954b261c75SHannes Frederic Sowa PKTINFO_SKB_CB(skb)->ipi_ifindex; 5964b261c75SHannes Frederic Sowa ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr, 5974b261c75SHannes Frederic Sowa &src_info.ipi6_addr); 5984b261c75SHannes Frederic Sowa } 599829ae9d6SWillem de Bruijn 600829ae9d6SWillem de Bruijn if (src_info.ipi6_ifindex >= 0) 601829ae9d6SWillem de Bruijn put_cmsg(msg, SOL_IPV6, IPV6_PKTINFO, 602829ae9d6SWillem de Bruijn sizeof(src_info), &src_info); 6034b261c75SHannes Frederic Sowa } 6044b261c75SHannes Frederic Sowa } 6054b261c75SHannes Frederic Sowa 6064b261c75SHannes Frederic Sowa void ip6_datagram_recv_specific_ctl(struct sock *sk, struct msghdr *msg, 60773df66f8STom Parkin struct sk_buff *skb) 6081da177e4SLinus Torvalds { 6091da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 6101da177e4SLinus Torvalds struct inet6_skb_parm *opt = IP6CB(skb); 611d56f90a7SArnaldo Carvalho de Melo unsigned char *nh = skb_network_header(skb); 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds if (np->rxopt.bits.rxhlim) { 6140660e03fSArnaldo Carvalho de Melo int hlim = ipv6_hdr(skb)->hop_limit; 6151da177e4SLinus Torvalds put_cmsg(msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); 6161da177e4SLinus Torvalds } 6171da177e4SLinus Torvalds 61841a1f8eaSYOSHIFUJI Hideaki if (np->rxopt.bits.rxtclass) { 619e7219858SYOSHIFUJI Hideaki / 吉藤英明 int tclass = ipv6_get_dsfield(ipv6_hdr(skb)); 62041a1f8eaSYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); 62141a1f8eaSYOSHIFUJI Hideaki } 62241a1f8eaSYOSHIFUJI Hideaki 6236502ca52SYOSHIFUJI Hideaki / 吉藤英明 if (np->rxopt.bits.rxflow) { 6246502ca52SYOSHIFUJI Hideaki / 吉藤英明 __be32 flowinfo = ip6_flowinfo((struct ipv6hdr *)nh); 6256502ca52SYOSHIFUJI Hideaki / 吉藤英明 if (flowinfo) 6261da177e4SLinus Torvalds put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); 6271da177e4SLinus Torvalds } 628333fad53SYOSHIFUJI Hideaki 629333fad53SYOSHIFUJI Hideaki /* HbH is allowed only once */ 6308b58a398SFlorian Westphal if (np->rxopt.bits.hopopts && (opt->flags & IP6SKB_HOPBYHOP)) { 6318b58a398SFlorian Westphal u8 *ptr = nh + sizeof(struct ipv6hdr); 6321da177e4SLinus Torvalds put_cmsg(msg, SOL_IPV6, IPV6_HOPOPTS, (ptr[1]+1)<<3, ptr); 6331da177e4SLinus Torvalds } 634333fad53SYOSHIFUJI Hideaki 635333fad53SYOSHIFUJI Hideaki if (opt->lastopt && 636333fad53SYOSHIFUJI Hideaki (np->rxopt.bits.dstopts || np->rxopt.bits.srcrt)) { 637333fad53SYOSHIFUJI Hideaki /* 638333fad53SYOSHIFUJI Hideaki * Silly enough, but we need to reparse in order to 639333fad53SYOSHIFUJI Hideaki * report extension headers (except for HbH) 640333fad53SYOSHIFUJI Hideaki * in order. 641333fad53SYOSHIFUJI Hideaki * 642333fad53SYOSHIFUJI Hideaki * Also note that IPV6_RECVRTHDRDSTOPTS is NOT 643333fad53SYOSHIFUJI Hideaki * (and WILL NOT be) defined because 644333fad53SYOSHIFUJI Hideaki * IPV6_RECVDSTOPTS is more generic. --yoshfuji 645333fad53SYOSHIFUJI Hideaki */ 646333fad53SYOSHIFUJI Hideaki unsigned int off = sizeof(struct ipv6hdr); 6470660e03fSArnaldo Carvalho de Melo u8 nexthdr = ipv6_hdr(skb)->nexthdr; 648333fad53SYOSHIFUJI Hideaki 649333fad53SYOSHIFUJI Hideaki while (off <= opt->lastopt) { 65095c96174SEric Dumazet unsigned int len; 651d56f90a7SArnaldo Carvalho de Melo u8 *ptr = nh + off; 652333fad53SYOSHIFUJI Hideaki 653333fad53SYOSHIFUJI Hideaki switch (nexthdr) { 654333fad53SYOSHIFUJI Hideaki case IPPROTO_DSTOPTS: 655333fad53SYOSHIFUJI Hideaki nexthdr = ptr[0]; 656333fad53SYOSHIFUJI Hideaki len = (ptr[1] + 1) << 3; 657333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.dstopts) 658333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_DSTOPTS, len, ptr); 659333fad53SYOSHIFUJI Hideaki break; 660333fad53SYOSHIFUJI Hideaki case IPPROTO_ROUTING: 661333fad53SYOSHIFUJI Hideaki nexthdr = ptr[0]; 662333fad53SYOSHIFUJI Hideaki len = (ptr[1] + 1) << 3; 663333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.srcrt) 664333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_RTHDR, len, ptr); 665333fad53SYOSHIFUJI Hideaki break; 666333fad53SYOSHIFUJI Hideaki case IPPROTO_AH: 667333fad53SYOSHIFUJI Hideaki nexthdr = ptr[0]; 668a3059893SVille Nuorvala len = (ptr[1] + 2) << 2; 669333fad53SYOSHIFUJI Hideaki break; 670333fad53SYOSHIFUJI Hideaki default: 671333fad53SYOSHIFUJI Hideaki nexthdr = ptr[0]; 672333fad53SYOSHIFUJI Hideaki len = (ptr[1] + 1) << 3; 673333fad53SYOSHIFUJI Hideaki break; 674333fad53SYOSHIFUJI Hideaki } 675333fad53SYOSHIFUJI Hideaki 676333fad53SYOSHIFUJI Hideaki off += len; 677333fad53SYOSHIFUJI Hideaki } 678333fad53SYOSHIFUJI Hideaki } 679333fad53SYOSHIFUJI Hideaki 680333fad53SYOSHIFUJI Hideaki /* socket options in old style */ 681333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxoinfo) { 682333fad53SYOSHIFUJI Hideaki struct in6_pktinfo src_info; 683333fad53SYOSHIFUJI Hideaki 684333fad53SYOSHIFUJI Hideaki src_info.ipi6_ifindex = opt->iif; 6854e3fd7a0SAlexey Dobriyan src_info.ipi6_addr = ipv6_hdr(skb)->daddr; 686333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); 687333fad53SYOSHIFUJI Hideaki } 688333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxohlim) { 6890660e03fSArnaldo Carvalho de Melo int hlim = ipv6_hdr(skb)->hop_limit; 690333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); 691333fad53SYOSHIFUJI Hideaki } 6928b58a398SFlorian Westphal if (np->rxopt.bits.ohopopts && (opt->flags & IP6SKB_HOPBYHOP)) { 6938b58a398SFlorian Westphal u8 *ptr = nh + sizeof(struct ipv6hdr); 694333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292HOPOPTS, (ptr[1]+1)<<3, ptr); 695333fad53SYOSHIFUJI Hideaki } 696333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.odstopts && opt->dst0) { 697d56f90a7SArnaldo Carvalho de Melo u8 *ptr = nh + opt->dst0; 698333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr); 6991da177e4SLinus Torvalds } 700333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.osrcrt && opt->srcrt) { 701d56f90a7SArnaldo Carvalho de Melo struct ipv6_rt_hdr *rthdr = (struct ipv6_rt_hdr *)(nh + opt->srcrt); 702333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292RTHDR, (rthdr->hdrlen+1) << 3, rthdr); 7031da177e4SLinus Torvalds } 704333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.odstopts && opt->dst1) { 705d56f90a7SArnaldo Carvalho de Melo u8 *ptr = nh + opt->dst1; 706333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr); 7071da177e4SLinus Torvalds } 7086c468622SBalazs Scheidler if (np->rxopt.bits.rxorigdstaddr) { 7096c468622SBalazs Scheidler struct sockaddr_in6 sin6; 710747465efSEric Dumazet __be16 *ports = (__be16 *) skb_transport_header(skb); 7116c468622SBalazs Scheidler 71239b2dd76SWillem de Bruijn if (skb_transport_offset(skb) + 4 <= (int)skb->len) { 7136c468622SBalazs Scheidler /* All current transport protocols have the port numbers in the 7146c468622SBalazs Scheidler * first four bytes of the transport header and this function is 7156c468622SBalazs Scheidler * written with this assumption in mind. 7166c468622SBalazs Scheidler */ 7176c468622SBalazs Scheidler 7186c468622SBalazs Scheidler sin6.sin6_family = AF_INET6; 7194e3fd7a0SAlexey Dobriyan sin6.sin6_addr = ipv6_hdr(skb)->daddr; 7206c468622SBalazs Scheidler sin6.sin6_port = ports[1]; 7216c468622SBalazs Scheidler sin6.sin6_flowinfo = 0; 7223868b7aaSHannes Frederic Sowa sin6.sin6_scope_id = 7233868b7aaSHannes Frederic Sowa ipv6_iface_scope_id(&ipv6_hdr(skb)->daddr, 7243868b7aaSHannes Frederic Sowa opt->iif); 7256c468622SBalazs Scheidler 7266c468622SBalazs Scheidler put_cmsg(msg, SOL_IPV6, IPV6_ORIGDSTADDR, sizeof(sin6), &sin6); 7276c468622SBalazs Scheidler } 7286c468622SBalazs Scheidler } 7290cc0aa61SWillem de Bruijn if (np->rxopt.bits.recvfragsize && opt->frag_max_size) { 7300cc0aa61SWillem de Bruijn int val = opt->frag_max_size; 7310cc0aa61SWillem de Bruijn 7320cc0aa61SWillem de Bruijn put_cmsg(msg, SOL_IPV6, IPV6_RECVFRAGSIZE, sizeof(val), &val); 7330cc0aa61SWillem de Bruijn } 7344b261c75SHannes Frederic Sowa } 7354b261c75SHannes Frederic Sowa 7364b261c75SHannes Frederic Sowa void ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg, 7374b261c75SHannes Frederic Sowa struct sk_buff *skb) 7384b261c75SHannes Frederic Sowa { 7394b261c75SHannes Frederic Sowa ip6_datagram_recv_common_ctl(sk, msg, skb); 7404b261c75SHannes Frederic Sowa ip6_datagram_recv_specific_ctl(sk, msg, skb); 7411da177e4SLinus Torvalds } 7428e72d37eSTom Parkin EXPORT_SYMBOL_GPL(ip6_datagram_recv_ctl); 7431da177e4SLinus Torvalds 74473df66f8STom Parkin int ip6_datagram_send_ctl(struct net *net, struct sock *sk, 7454c9483b2SDavid S. Miller struct msghdr *msg, struct flowi6 *fl6, 74626879da5SWei Wang struct ipcm6_cookie *ipc6, struct sockcm_cookie *sockc) 7471da177e4SLinus Torvalds { 7481da177e4SLinus Torvalds struct in6_pktinfo *src_info; 7491da177e4SLinus Torvalds struct cmsghdr *cmsg; 7501da177e4SLinus Torvalds struct ipv6_rt_hdr *rthdr; 7511da177e4SLinus Torvalds struct ipv6_opt_hdr *hdr; 75226879da5SWei Wang struct ipv6_txoptions *opt = ipc6->opt; 7531da177e4SLinus Torvalds int len; 7541da177e4SLinus Torvalds int err = 0; 7551da177e4SLinus Torvalds 756f95b414eSGu Zheng for_each_cmsghdr(cmsg, msg) { 7571da177e4SLinus Torvalds int addr_type; 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds if (!CMSG_OK(msg, cmsg)) { 7601da177e4SLinus Torvalds err = -EINVAL; 7611da177e4SLinus Torvalds goto exit_f; 7621da177e4SLinus Torvalds } 7631da177e4SLinus Torvalds 764ad1e46a8SSoheil Hassas Yeganeh if (cmsg->cmsg_level == SOL_SOCKET) { 7652632616bSEric Dumazet err = __sock_cmsg_send(sk, msg, cmsg, sockc); 7662632616bSEric Dumazet if (err) 7672632616bSEric Dumazet return err; 768ad1e46a8SSoheil Hassas Yeganeh continue; 769ad1e46a8SSoheil Hassas Yeganeh } 770ad1e46a8SSoheil Hassas Yeganeh 7711da177e4SLinus Torvalds if (cmsg->cmsg_level != SOL_IPV6) 7721da177e4SLinus Torvalds continue; 7731da177e4SLinus Torvalds 7741da177e4SLinus Torvalds switch (cmsg->cmsg_type) { 7751da177e4SLinus Torvalds case IPV6_PKTINFO: 776333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 777187e3838SYOSHIFUJI Hideaki { 778187e3838SYOSHIFUJI Hideaki struct net_device *dev = NULL; 779187e3838SYOSHIFUJI Hideaki 7801da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct in6_pktinfo))) { 7811da177e4SLinus Torvalds err = -EINVAL; 7821da177e4SLinus Torvalds goto exit_f; 7831da177e4SLinus Torvalds } 7841da177e4SLinus Torvalds 7851da177e4SLinus Torvalds src_info = (struct in6_pktinfo *)CMSG_DATA(cmsg); 7861da177e4SLinus Torvalds 7871da177e4SLinus Torvalds if (src_info->ipi6_ifindex) { 7884c9483b2SDavid S. Miller if (fl6->flowi6_oif && 7894c9483b2SDavid S. Miller src_info->ipi6_ifindex != fl6->flowi6_oif) 7901da177e4SLinus Torvalds return -EINVAL; 7914c9483b2SDavid S. Miller fl6->flowi6_oif = src_info->ipi6_ifindex; 7921da177e4SLinus Torvalds } 7931da177e4SLinus Torvalds 794187e3838SYOSHIFUJI Hideaki addr_type = __ipv6_addr_type(&src_info->ipi6_addr); 7951da177e4SLinus Torvalds 796536b2e92SEric Dumazet rcu_read_lock(); 7974c9483b2SDavid S. Miller if (fl6->flowi6_oif) { 7984c9483b2SDavid S. Miller dev = dev_get_by_index_rcu(net, fl6->flowi6_oif); 799536b2e92SEric Dumazet if (!dev) { 800536b2e92SEric Dumazet rcu_read_unlock(); 8011da177e4SLinus Torvalds return -ENODEV; 802536b2e92SEric Dumazet } 803536b2e92SEric Dumazet } else if (addr_type & IPV6_ADDR_LINKLOCAL) { 804536b2e92SEric Dumazet rcu_read_unlock(); 805187e3838SYOSHIFUJI Hideaki return -EINVAL; 806536b2e92SEric Dumazet } 807187e3838SYOSHIFUJI Hideaki 808187e3838SYOSHIFUJI Hideaki if (addr_type != IPV6_ADDR_ANY) { 809187e3838SYOSHIFUJI Hideaki int strict = __ipv6_addr_src_scope(addr_type) <= IPV6_ADDR_SCOPE_LINKLOCAL; 8102563fa59SMaciej Żenczykowski if (!(inet_sk(sk)->freebind || inet_sk(sk)->transparent) && 811ec0506dbSMaciej Żenczykowski !ipv6_chk_addr(net, &src_info->ipi6_addr, 8127c90cc2dSFX Le Bail strict ? dev : NULL, 0) && 8137c90cc2dSFX Le Bail !ipv6_chk_acast_addr_src(net, dev, 8147c90cc2dSFX Le Bail &src_info->ipi6_addr)) 8151da177e4SLinus Torvalds err = -EINVAL; 816187e3838SYOSHIFUJI Hideaki else 8174e3fd7a0SAlexey Dobriyan fl6->saddr = src_info->ipi6_addr; 8181da177e4SLinus Torvalds } 819187e3838SYOSHIFUJI Hideaki 820536b2e92SEric Dumazet rcu_read_unlock(); 8211da177e4SLinus Torvalds 822187e3838SYOSHIFUJI Hideaki if (err) 823187e3838SYOSHIFUJI Hideaki goto exit_f; 824187e3838SYOSHIFUJI Hideaki 8251da177e4SLinus Torvalds break; 826187e3838SYOSHIFUJI Hideaki } 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds case IPV6_FLOWINFO: 8291da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(4)) { 8301da177e4SLinus Torvalds err = -EINVAL; 8311da177e4SLinus Torvalds goto exit_f; 8321da177e4SLinus Torvalds } 8331da177e4SLinus Torvalds 8344c9483b2SDavid S. Miller if (fl6->flowlabel&IPV6_FLOWINFO_MASK) { 8354c9483b2SDavid S. Miller if ((fl6->flowlabel^*(__be32 *)CMSG_DATA(cmsg))&~IPV6_FLOWINFO_MASK) { 8361da177e4SLinus Torvalds err = -EINVAL; 8371da177e4SLinus Torvalds goto exit_f; 8381da177e4SLinus Torvalds } 8391da177e4SLinus Torvalds } 8404c9483b2SDavid S. Miller fl6->flowlabel = IPV6_FLOWINFO_MASK & *(__be32 *)CMSG_DATA(cmsg); 8411da177e4SLinus Torvalds break; 8421da177e4SLinus Torvalds 843333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 8441da177e4SLinus Torvalds case IPV6_HOPOPTS: 8451da177e4SLinus Torvalds if (opt->hopopt || cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { 8461da177e4SLinus Torvalds err = -EINVAL; 8471da177e4SLinus Torvalds goto exit_f; 8481da177e4SLinus Torvalds } 8491da177e4SLinus Torvalds 8501da177e4SLinus Torvalds hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); 8511da177e4SLinus Torvalds len = ((hdr->hdrlen + 1) << 3); 8521da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(len)) { 8531da177e4SLinus Torvalds err = -EINVAL; 8541da177e4SLinus Torvalds goto exit_f; 8551da177e4SLinus Torvalds } 856af31f412SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_RAW)) { 8571da177e4SLinus Torvalds err = -EPERM; 8581da177e4SLinus Torvalds goto exit_f; 8591da177e4SLinus Torvalds } 8601da177e4SLinus Torvalds opt->opt_nflen += len; 8611da177e4SLinus Torvalds opt->hopopt = hdr; 8621da177e4SLinus Torvalds break; 8631da177e4SLinus Torvalds 864333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 8651da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { 8661da177e4SLinus Torvalds err = -EINVAL; 8671da177e4SLinus Torvalds goto exit_f; 8681da177e4SLinus Torvalds } 8691da177e4SLinus Torvalds 8701da177e4SLinus Torvalds hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); 8711da177e4SLinus Torvalds len = ((hdr->hdrlen + 1) << 3); 8721da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(len)) { 8731da177e4SLinus Torvalds err = -EINVAL; 8741da177e4SLinus Torvalds goto exit_f; 8751da177e4SLinus Torvalds } 876af31f412SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_RAW)) { 8771da177e4SLinus Torvalds err = -EPERM; 8781da177e4SLinus Torvalds goto exit_f; 8791da177e4SLinus Torvalds } 8801da177e4SLinus Torvalds if (opt->dst1opt) { 8811da177e4SLinus Torvalds err = -EINVAL; 8821da177e4SLinus Torvalds goto exit_f; 8831da177e4SLinus Torvalds } 8841da177e4SLinus Torvalds opt->opt_flen += len; 8851da177e4SLinus Torvalds opt->dst1opt = hdr; 8861da177e4SLinus Torvalds break; 8871da177e4SLinus Torvalds 888333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 889333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 890333fad53SYOSHIFUJI Hideaki if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { 891333fad53SYOSHIFUJI Hideaki err = -EINVAL; 892333fad53SYOSHIFUJI Hideaki goto exit_f; 893333fad53SYOSHIFUJI Hideaki } 894333fad53SYOSHIFUJI Hideaki 895333fad53SYOSHIFUJI Hideaki hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); 896333fad53SYOSHIFUJI Hideaki len = ((hdr->hdrlen + 1) << 3); 897333fad53SYOSHIFUJI Hideaki if (cmsg->cmsg_len < CMSG_LEN(len)) { 898333fad53SYOSHIFUJI Hideaki err = -EINVAL; 899333fad53SYOSHIFUJI Hideaki goto exit_f; 900333fad53SYOSHIFUJI Hideaki } 901af31f412SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_RAW)) { 902333fad53SYOSHIFUJI Hideaki err = -EPERM; 903333fad53SYOSHIFUJI Hideaki goto exit_f; 904333fad53SYOSHIFUJI Hideaki } 905333fad53SYOSHIFUJI Hideaki if (cmsg->cmsg_type == IPV6_DSTOPTS) { 906333fad53SYOSHIFUJI Hideaki opt->opt_flen += len; 907333fad53SYOSHIFUJI Hideaki opt->dst1opt = hdr; 908333fad53SYOSHIFUJI Hideaki } else { 909333fad53SYOSHIFUJI Hideaki opt->opt_nflen += len; 910333fad53SYOSHIFUJI Hideaki opt->dst0opt = hdr; 911333fad53SYOSHIFUJI Hideaki } 912333fad53SYOSHIFUJI Hideaki break; 913333fad53SYOSHIFUJI Hideaki 914333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 9151da177e4SLinus Torvalds case IPV6_RTHDR: 9161da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_rt_hdr))) { 9171da177e4SLinus Torvalds err = -EINVAL; 9181da177e4SLinus Torvalds goto exit_f; 9191da177e4SLinus Torvalds } 9201da177e4SLinus Torvalds 9211da177e4SLinus Torvalds rthdr = (struct ipv6_rt_hdr *)CMSG_DATA(cmsg); 9221da177e4SLinus Torvalds 923280a9d34SMasahide NAKAMURA switch (rthdr->type) { 92407a93626SAmerigo Wang #if IS_ENABLED(CONFIG_IPV6_MIP6) 925280a9d34SMasahide NAKAMURA case IPV6_SRCRT_TYPE_2: 9266e093d9dSBrian Haley if (rthdr->hdrlen != 2 || 9276e093d9dSBrian Haley rthdr->segments_left != 1) { 9286e093d9dSBrian Haley err = -EINVAL; 9296e093d9dSBrian Haley goto exit_f; 9306e093d9dSBrian Haley } 931280a9d34SMasahide NAKAMURA break; 932bb4dbf9eSYOSHIFUJI Hideaki #endif 933280a9d34SMasahide NAKAMURA default: 9341da177e4SLinus Torvalds err = -EINVAL; 9351da177e4SLinus Torvalds goto exit_f; 9361da177e4SLinus Torvalds } 9371da177e4SLinus Torvalds 9381da177e4SLinus Torvalds len = ((rthdr->hdrlen + 1) << 3); 9391da177e4SLinus Torvalds 9401da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(len)) { 9411da177e4SLinus Torvalds err = -EINVAL; 9421da177e4SLinus Torvalds goto exit_f; 9431da177e4SLinus Torvalds } 9441da177e4SLinus Torvalds 9451da177e4SLinus Torvalds /* segments left must also match */ 9461da177e4SLinus Torvalds if ((rthdr->hdrlen >> 1) != rthdr->segments_left) { 9471da177e4SLinus Torvalds err = -EINVAL; 9481da177e4SLinus Torvalds goto exit_f; 9491da177e4SLinus Torvalds } 9501da177e4SLinus Torvalds 9511da177e4SLinus Torvalds opt->opt_nflen += len; 9521da177e4SLinus Torvalds opt->srcrt = rthdr; 9531da177e4SLinus Torvalds 954333fad53SYOSHIFUJI Hideaki if (cmsg->cmsg_type == IPV6_2292RTHDR && opt->dst1opt) { 9551da177e4SLinus Torvalds int dsthdrlen = ((opt->dst1opt->hdrlen+1)<<3); 9561da177e4SLinus Torvalds 9571da177e4SLinus Torvalds opt->opt_nflen += dsthdrlen; 9581da177e4SLinus Torvalds opt->dst0opt = opt->dst1opt; 9591da177e4SLinus Torvalds opt->dst1opt = NULL; 9601da177e4SLinus Torvalds opt->opt_flen -= dsthdrlen; 9611da177e4SLinus Torvalds } 9621da177e4SLinus Torvalds 9631da177e4SLinus Torvalds break; 9641da177e4SLinus Torvalds 965333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 9661da177e4SLinus Torvalds case IPV6_HOPLIMIT: 9671da177e4SLinus Torvalds if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) { 9681da177e4SLinus Torvalds err = -EINVAL; 9691da177e4SLinus Torvalds goto exit_f; 9701da177e4SLinus Torvalds } 9711da177e4SLinus Torvalds 97226879da5SWei Wang ipc6->hlimit = *(int *)CMSG_DATA(cmsg); 97326879da5SWei Wang if (ipc6->hlimit < -1 || ipc6->hlimit > 0xff) { 974e8766fc8SShan Wei err = -EINVAL; 975e8766fc8SShan Wei goto exit_f; 976e8766fc8SShan Wei } 977e8766fc8SShan Wei 9781da177e4SLinus Torvalds break; 9791da177e4SLinus Torvalds 98041a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 98141a1f8eaSYOSHIFUJI Hideaki { 98241a1f8eaSYOSHIFUJI Hideaki int tc; 98341a1f8eaSYOSHIFUJI Hideaki 98441a1f8eaSYOSHIFUJI Hideaki err = -EINVAL; 985b5a4257cSEldad Zack if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) 98641a1f8eaSYOSHIFUJI Hideaki goto exit_f; 98741a1f8eaSYOSHIFUJI Hideaki 98841a1f8eaSYOSHIFUJI Hideaki tc = *(int *)CMSG_DATA(cmsg); 989d0ee011fSRemi Denis-Courmont if (tc < -1 || tc > 0xff) 99041a1f8eaSYOSHIFUJI Hideaki goto exit_f; 99141a1f8eaSYOSHIFUJI Hideaki 99241a1f8eaSYOSHIFUJI Hideaki err = 0; 99326879da5SWei Wang ipc6->tclass = tc; 99441a1f8eaSYOSHIFUJI Hideaki 99541a1f8eaSYOSHIFUJI Hideaki break; 99641a1f8eaSYOSHIFUJI Hideaki } 99713b52cd4SBrian Haley 99813b52cd4SBrian Haley case IPV6_DONTFRAG: 99913b52cd4SBrian Haley { 100013b52cd4SBrian Haley int df; 100113b52cd4SBrian Haley 100213b52cd4SBrian Haley err = -EINVAL; 1003b5a4257cSEldad Zack if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) 100413b52cd4SBrian Haley goto exit_f; 100513b52cd4SBrian Haley 100613b52cd4SBrian Haley df = *(int *)CMSG_DATA(cmsg); 100713b52cd4SBrian Haley if (df < 0 || df > 1) 100813b52cd4SBrian Haley goto exit_f; 100913b52cd4SBrian Haley 101013b52cd4SBrian Haley err = 0; 101126879da5SWei Wang ipc6->dontfrag = df; 101213b52cd4SBrian Haley 101313b52cd4SBrian Haley break; 101413b52cd4SBrian Haley } 10151da177e4SLinus Torvalds default: 1016ba7a46f1SJoe Perches net_dbg_ratelimited("invalid cmsg type: %d\n", 101764ce2073SPatrick McHardy cmsg->cmsg_type); 10181da177e4SLinus Torvalds err = -EINVAL; 10194a36702eSMiao Xie goto exit_f; 10203ff50b79SStephen Hemminger } 10211da177e4SLinus Torvalds } 10221da177e4SLinus Torvalds 10231da177e4SLinus Torvalds exit_f: 10241da177e4SLinus Torvalds return err; 10251da177e4SLinus Torvalds } 102673df66f8STom Parkin EXPORT_SYMBOL_GPL(ip6_datagram_send_ctl); 102717ef66afSLorenzo Colitti 102817ef66afSLorenzo Colitti void ip6_dgram_sock_seq_show(struct seq_file *seq, struct sock *sp, 102917ef66afSLorenzo Colitti __u16 srcp, __u16 destp, int bucket) 103017ef66afSLorenzo Colitti { 103117ef66afSLorenzo Colitti const struct in6_addr *dest, *src; 103217ef66afSLorenzo Colitti 1033efe4208fSEric Dumazet dest = &sp->sk_v6_daddr; 1034efe4208fSEric Dumazet src = &sp->sk_v6_rcv_saddr; 103517ef66afSLorenzo Colitti seq_printf(seq, 103617ef66afSLorenzo Colitti "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " 1037d14c5ab6SFrancesco Fusco "%02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d\n", 103817ef66afSLorenzo Colitti bucket, 103917ef66afSLorenzo Colitti src->s6_addr32[0], src->s6_addr32[1], 104017ef66afSLorenzo Colitti src->s6_addr32[2], src->s6_addr32[3], srcp, 104117ef66afSLorenzo Colitti dest->s6_addr32[0], dest->s6_addr32[1], 104217ef66afSLorenzo Colitti dest->s6_addr32[2], dest->s6_addr32[3], destp, 104317ef66afSLorenzo Colitti sp->sk_state, 104417ef66afSLorenzo Colitti sk_wmem_alloc_get(sp), 104517ef66afSLorenzo Colitti sk_rmem_alloc_get(sp), 104617ef66afSLorenzo Colitti 0, 0L, 0, 104717ef66afSLorenzo Colitti from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), 104817ef66afSLorenzo Colitti 0, 104917ef66afSLorenzo Colitti sock_i_ino(sp), 105041c6d650SReshetova, Elena refcount_read(&sp->sk_refcnt), sp, 105117ef66afSLorenzo Colitti atomic_read(&sp->sk_drops)); 105217ef66afSLorenzo Colitti } 1053