12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * common UDP/RAW code 41da177e4SLinus Torvalds * Linux INET6 implementation 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Authors: 71da177e4SLinus Torvalds * Pedro Roque <roque@di.fc.ul.pt> 81da177e4SLinus Torvalds */ 91da177e4SLinus Torvalds 104fc268d2SRandy Dunlap #include <linux/capability.h> 111da177e4SLinus Torvalds #include <linux/errno.h> 121da177e4SLinus Torvalds #include <linux/types.h> 131da177e4SLinus Torvalds #include <linux/kernel.h> 141da177e4SLinus Torvalds #include <linux/interrupt.h> 151da177e4SLinus Torvalds #include <linux/socket.h> 161da177e4SLinus Torvalds #include <linux/sockios.h> 171da177e4SLinus Torvalds #include <linux/in6.h> 181da177e4SLinus Torvalds #include <linux/ipv6.h> 191da177e4SLinus Torvalds #include <linux/route.h> 205a0e3ad6STejun Heo #include <linux/slab.h> 21a495f836SChris Elston #include <linux/export.h> 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds #include <net/ipv6.h> 241da177e4SLinus Torvalds #include <net/ndisc.h> 251da177e4SLinus Torvalds #include <net/addrconf.h> 261da177e4SLinus Torvalds #include <net/transp_v6.h> 271da177e4SLinus Torvalds #include <net/ip6_route.h> 28c752f073SArnaldo Carvalho de Melo #include <net/tcp_states.h> 29e7219858SYOSHIFUJI Hideaki / 吉藤英明 #include <net/dsfield.h> 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds #include <linux/errqueue.h> 327c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 331da177e4SLinus Torvalds 34a50feda5SEric Dumazet static bool ipv6_mapped_addr_any(const struct in6_addr *a) 35c15fea2dSMax Matveev { 36a50feda5SEric Dumazet return ipv6_addr_v4mapped(a) && (a->s6_addr32[3] == 0); 37c15fea2dSMax Matveev } 38c15fea2dSMax Matveev 3980fbdb20SMartin KaFai Lau static void ip6_datagram_flow_key_init(struct flowi6 *fl6, struct sock *sk) 4080fbdb20SMartin KaFai Lau { 4180fbdb20SMartin KaFai Lau struct inet_sock *inet = inet_sk(sk); 4280fbdb20SMartin KaFai Lau struct ipv6_pinfo *np = inet6_sk(sk); 4380fbdb20SMartin KaFai Lau 4480fbdb20SMartin KaFai Lau memset(fl6, 0, sizeof(*fl6)); 4580fbdb20SMartin KaFai Lau fl6->flowi6_proto = sk->sk_protocol; 4680fbdb20SMartin KaFai Lau fl6->daddr = sk->sk_v6_daddr; 4780fbdb20SMartin KaFai Lau fl6->saddr = np->saddr; 4880fbdb20SMartin KaFai Lau fl6->flowi6_oif = sk->sk_bound_dev_if; 4980fbdb20SMartin KaFai Lau fl6->flowi6_mark = sk->sk_mark; 5080fbdb20SMartin KaFai Lau fl6->fl6_dport = inet->inet_dport; 5180fbdb20SMartin KaFai Lau fl6->fl6_sport = inet->inet_sport; 5280fbdb20SMartin KaFai Lau fl6->flowlabel = np->flow_label; 53e2d118a1SLorenzo Colitti fl6->flowi6_uid = sk->sk_uid; 5480fbdb20SMartin KaFai Lau 5580fbdb20SMartin KaFai Lau if (!fl6->flowi6_oif) 5680fbdb20SMartin KaFai Lau fl6->flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; 5780fbdb20SMartin KaFai Lau 5880fbdb20SMartin KaFai Lau if (!fl6->flowi6_oif && ipv6_addr_is_multicast(&fl6->daddr)) 5980fbdb20SMartin KaFai Lau fl6->flowi6_oif = np->mcast_oif; 6080fbdb20SMartin KaFai Lau 6180fbdb20SMartin KaFai Lau security_sk_classify_flow(sk, flowi6_to_flowi(fl6)); 6280fbdb20SMartin KaFai Lau } 6380fbdb20SMartin KaFai Lau 6433c162a9SMartin KaFai Lau int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr) 657e2040dbSMartin KaFai Lau { 667e2040dbSMartin KaFai Lau struct ip6_flowlabel *flowlabel = NULL; 677e2040dbSMartin KaFai Lau struct in6_addr *final_p, final; 687e2040dbSMartin KaFai Lau struct ipv6_txoptions *opt; 697e2040dbSMartin KaFai Lau struct dst_entry *dst; 707e2040dbSMartin KaFai Lau struct inet_sock *inet = inet_sk(sk); 717e2040dbSMartin KaFai Lau struct ipv6_pinfo *np = inet6_sk(sk); 727e2040dbSMartin KaFai Lau struct flowi6 fl6; 737e2040dbSMartin KaFai Lau int err = 0; 747e2040dbSMartin KaFai Lau 757e2040dbSMartin KaFai Lau if (np->sndflow && (np->flow_label & IPV6_FLOWLABEL_MASK)) { 767e2040dbSMartin KaFai Lau flowlabel = fl6_sock_lookup(sk, np->flow_label); 777e2040dbSMartin KaFai Lau if (!flowlabel) 787e2040dbSMartin KaFai Lau return -EINVAL; 797e2040dbSMartin KaFai Lau } 807e2040dbSMartin KaFai Lau ip6_datagram_flow_key_init(&fl6, sk); 817e2040dbSMartin KaFai Lau 827e2040dbSMartin KaFai Lau rcu_read_lock(); 837e2040dbSMartin KaFai Lau opt = flowlabel ? flowlabel->opt : rcu_dereference(np->opt); 847e2040dbSMartin KaFai Lau final_p = fl6_update_dst(&fl6, opt, &final); 857e2040dbSMartin KaFai Lau rcu_read_unlock(); 867e2040dbSMartin KaFai Lau 877e2040dbSMartin KaFai Lau dst = ip6_dst_lookup_flow(sk, &fl6, final_p); 887e2040dbSMartin KaFai Lau if (IS_ERR(dst)) { 897e2040dbSMartin KaFai Lau err = PTR_ERR(dst); 907e2040dbSMartin KaFai Lau goto out; 917e2040dbSMartin KaFai Lau } 927e2040dbSMartin KaFai Lau 9333c162a9SMartin KaFai Lau if (fix_sk_saddr) { 947e2040dbSMartin KaFai Lau if (ipv6_addr_any(&np->saddr)) 957e2040dbSMartin KaFai Lau np->saddr = fl6.saddr; 967e2040dbSMartin KaFai Lau 977e2040dbSMartin KaFai Lau if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { 987e2040dbSMartin KaFai Lau sk->sk_v6_rcv_saddr = fl6.saddr; 997e2040dbSMartin KaFai Lau inet->inet_rcv_saddr = LOOPBACK4_IPV6; 1007e2040dbSMartin KaFai Lau if (sk->sk_prot->rehash) 1017e2040dbSMartin KaFai Lau sk->sk_prot->rehash(sk); 1027e2040dbSMartin KaFai Lau } 10333c162a9SMartin KaFai Lau } 1047e2040dbSMartin KaFai Lau 1057d6850f7SAlexey Kodanev ip6_sk_dst_store_flow(sk, dst, &fl6); 1067e2040dbSMartin KaFai Lau 1077e2040dbSMartin KaFai Lau out: 1087e2040dbSMartin KaFai Lau fl6_sock_release(flowlabel); 1097e2040dbSMartin KaFai Lau return err; 1107e2040dbSMartin KaFai Lau } 1117e2040dbSMartin KaFai Lau 112e646b657SMartin KaFai Lau void ip6_datagram_release_cb(struct sock *sk) 113e646b657SMartin KaFai Lau { 114e646b657SMartin KaFai Lau struct dst_entry *dst; 115e646b657SMartin KaFai Lau 116e646b657SMartin KaFai Lau if (ipv6_addr_v4mapped(&sk->sk_v6_daddr)) 117e646b657SMartin KaFai Lau return; 118e646b657SMartin KaFai Lau 119e646b657SMartin KaFai Lau rcu_read_lock(); 120e646b657SMartin KaFai Lau dst = __sk_dst_get(sk); 121e646b657SMartin KaFai Lau if (!dst || !dst->obsolete || 122e646b657SMartin KaFai Lau dst->ops->check(dst, inet6_sk(sk)->dst_cookie)) { 123e646b657SMartin KaFai Lau rcu_read_unlock(); 124e646b657SMartin KaFai Lau return; 125e646b657SMartin KaFai Lau } 126e646b657SMartin KaFai Lau rcu_read_unlock(); 127e646b657SMartin KaFai Lau 128e646b657SMartin KaFai Lau ip6_datagram_dst_update(sk, false); 129e646b657SMartin KaFai Lau } 130e646b657SMartin KaFai Lau EXPORT_SYMBOL_GPL(ip6_datagram_release_cb); 131e646b657SMartin KaFai Lau 1320382a25aSGuillaume Nault int __ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, 1330382a25aSGuillaume Nault int addr_len) 1341da177e4SLinus Torvalds { 1351da177e4SLinus Torvalds struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr; 1361da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 1371da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 1382f987a76SPaolo Abeni struct in6_addr *daddr, old_daddr; 1392f987a76SPaolo Abeni __be32 fl6_flowlabel = 0; 1402f987a76SPaolo Abeni __be32 old_fl6_flowlabel; 1415f2fb802SStefano Brivio __be16 old_dport; 1421da177e4SLinus Torvalds int addr_type; 1431da177e4SLinus Torvalds int err; 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds if (usin->sin6_family == AF_INET) { 1461da177e4SLinus Torvalds if (__ipv6_only_sock(sk)) 1471da177e4SLinus Torvalds return -EAFNOSUPPORT; 14803645a11SEric Dumazet err = __ip4_datagram_connect(sk, uaddr, addr_len); 1491da177e4SLinus Torvalds goto ipv4_connected; 1501da177e4SLinus Torvalds } 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133) 1531da177e4SLinus Torvalds return -EINVAL; 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds if (usin->sin6_family != AF_INET6) 1561da177e4SLinus Torvalds return -EAFNOSUPPORT; 1571da177e4SLinus Torvalds 1587e2040dbSMartin KaFai Lau if (np->sndflow) 15980fbdb20SMartin KaFai Lau fl6_flowlabel = usin->sin6_flowinfo & IPV6_FLOWINFO_MASK; 1601da177e4SLinus Torvalds 161052d2369SJonathan T. Leighton if (ipv6_addr_any(&usin->sin6_addr)) { 1621da177e4SLinus Torvalds /* 1631da177e4SLinus Torvalds * connect to self 1641da177e4SLinus Torvalds */ 165052d2369SJonathan T. Leighton if (ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr)) 166052d2369SJonathan T. Leighton ipv6_addr_set_v4mapped(htonl(INADDR_LOOPBACK), 167052d2369SJonathan T. Leighton &usin->sin6_addr); 168052d2369SJonathan T. Leighton else 169052d2369SJonathan T. Leighton usin->sin6_addr = in6addr_loopback; 1701da177e4SLinus Torvalds } 1711da177e4SLinus Torvalds 172052d2369SJonathan T. Leighton addr_type = ipv6_addr_type(&usin->sin6_addr); 173052d2369SJonathan T. Leighton 1741da177e4SLinus Torvalds daddr = &usin->sin6_addr; 1751da177e4SLinus Torvalds 176052d2369SJonathan T. Leighton if (addr_type & IPV6_ADDR_MAPPED) { 1771da177e4SLinus Torvalds struct sockaddr_in sin; 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds if (__ipv6_only_sock(sk)) { 1801da177e4SLinus Torvalds err = -ENETUNREACH; 1811da177e4SLinus Torvalds goto out; 1821da177e4SLinus Torvalds } 1831da177e4SLinus Torvalds sin.sin_family = AF_INET; 1841da177e4SLinus Torvalds sin.sin_addr.s_addr = daddr->s6_addr32[3]; 1851da177e4SLinus Torvalds sin.sin_port = usin->sin6_port; 1861da177e4SLinus Torvalds 18703645a11SEric Dumazet err = __ip4_datagram_connect(sk, 1881da177e4SLinus Torvalds (struct sockaddr *) &sin, 1891da177e4SLinus Torvalds sizeof(sin)); 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds ipv4_connected: 1921da177e4SLinus Torvalds if (err) 1931da177e4SLinus Torvalds goto out; 1941da177e4SLinus Torvalds 195efe4208fSEric Dumazet ipv6_addr_set_v4mapped(inet->inet_daddr, &sk->sk_v6_daddr); 1961da177e4SLinus Torvalds 197c15fea2dSMax Matveev if (ipv6_addr_any(&np->saddr) || 198c15fea2dSMax Matveev ipv6_mapped_addr_any(&np->saddr)) 199c720c7e8SEric Dumazet ipv6_addr_set_v4mapped(inet->inet_saddr, &np->saddr); 2001da177e4SLinus Torvalds 201efe4208fSEric Dumazet if (ipv6_addr_any(&sk->sk_v6_rcv_saddr) || 202efe4208fSEric Dumazet ipv6_mapped_addr_any(&sk->sk_v6_rcv_saddr)) { 203c720c7e8SEric Dumazet ipv6_addr_set_v4mapped(inet->inet_rcv_saddr, 204efe4208fSEric Dumazet &sk->sk_v6_rcv_saddr); 205719f8358SEric Dumazet if (sk->sk_prot->rehash) 206719f8358SEric Dumazet sk->sk_prot->rehash(sk); 207719f8358SEric Dumazet } 208b301e82cSBrian Haley 2091da177e4SLinus Torvalds goto out; 2101da177e4SLinus Torvalds } 2111da177e4SLinus Torvalds 212842df073SHannes Frederic Sowa if (__ipv6_addr_needs_scope_id(addr_type)) { 2131da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) && 2141da177e4SLinus Torvalds usin->sin6_scope_id) { 21554dc3e33SDavid Ahern if (!sk_dev_equal_l3scope(sk, usin->sin6_scope_id)) { 2161da177e4SLinus Torvalds err = -EINVAL; 2171da177e4SLinus Torvalds goto out; 2181da177e4SLinus Torvalds } 2191da177e4SLinus Torvalds sk->sk_bound_dev_if = usin->sin6_scope_id; 2201da177e4SLinus Torvalds } 2211da177e4SLinus Torvalds 2221ac4f008SBrian Haley if (!sk->sk_bound_dev_if && (addr_type & IPV6_ADDR_MULTICAST)) 2231ac4f008SBrian Haley sk->sk_bound_dev_if = np->mcast_oif; 2241ac4f008SBrian Haley 2251da177e4SLinus Torvalds /* Connect to link-local address requires an interface */ 2261da177e4SLinus Torvalds if (!sk->sk_bound_dev_if) { 2271da177e4SLinus Torvalds err = -EINVAL; 2281da177e4SLinus Torvalds goto out; 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds } 2311da177e4SLinus Torvalds 2322f987a76SPaolo Abeni /* save the current peer information before updating it */ 2332f987a76SPaolo Abeni old_daddr = sk->sk_v6_daddr; 2342f987a76SPaolo Abeni old_fl6_flowlabel = np->flow_label; 2352f987a76SPaolo Abeni old_dport = inet->inet_dport; 2362f987a76SPaolo Abeni 237efe4208fSEric Dumazet sk->sk_v6_daddr = *daddr; 23880fbdb20SMartin KaFai Lau np->flow_label = fl6_flowlabel; 239c720c7e8SEric Dumazet inet->inet_dport = usin->sin6_port; 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds /* 2421da177e4SLinus Torvalds * Check for a route to destination an obtain the 2431da177e4SLinus Torvalds * destination cache for it. 2441da177e4SLinus Torvalds */ 2451da177e4SLinus Torvalds 24633c162a9SMartin KaFai Lau err = ip6_datagram_dst_update(sk, true); 24785cb73ffSWei Wang if (err) { 2482f987a76SPaolo Abeni /* Restore the socket peer info, to keep it consistent with 2492f987a76SPaolo Abeni * the old socket state 25085cb73ffSWei Wang */ 2512f987a76SPaolo Abeni sk->sk_v6_daddr = old_daddr; 2522f987a76SPaolo Abeni np->flow_label = old_fl6_flowlabel; 2532f987a76SPaolo Abeni inet->inet_dport = old_dport; 2541da177e4SLinus Torvalds goto out; 25585cb73ffSWei Wang } 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds sk->sk_state = TCP_ESTABLISHED; 258877d1f62STom Herbert sk_set_txhash(sk); 2591da177e4SLinus Torvalds out: 2601da177e4SLinus Torvalds return err; 2611da177e4SLinus Torvalds } 2620382a25aSGuillaume Nault EXPORT_SYMBOL_GPL(__ip6_datagram_connect); 26303645a11SEric Dumazet 26403645a11SEric Dumazet int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) 26503645a11SEric Dumazet { 26603645a11SEric Dumazet int res; 26703645a11SEric Dumazet 26803645a11SEric Dumazet lock_sock(sk); 26903645a11SEric Dumazet res = __ip6_datagram_connect(sk, uaddr, addr_len); 27003645a11SEric Dumazet release_sock(sk); 27103645a11SEric Dumazet return res; 27203645a11SEric Dumazet } 273a495f836SChris Elston EXPORT_SYMBOL_GPL(ip6_datagram_connect); 2741da177e4SLinus Torvalds 27582b276cdSHannes Frederic Sowa int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *uaddr, 27682b276cdSHannes Frederic Sowa int addr_len) 27782b276cdSHannes Frederic Sowa { 27882b276cdSHannes Frederic Sowa DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, uaddr); 27982b276cdSHannes Frederic Sowa if (sin6->sin6_family != AF_INET6) 28082b276cdSHannes Frederic Sowa return -EAFNOSUPPORT; 28182b276cdSHannes Frederic Sowa return ip6_datagram_connect(sk, uaddr, addr_len); 28282b276cdSHannes Frederic Sowa } 28382b276cdSHannes Frederic Sowa EXPORT_SYMBOL_GPL(ip6_datagram_connect_v6_only); 28482b276cdSHannes Frederic Sowa 2851da177e4SLinus Torvalds void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, 286e69a4adcSAl Viro __be16 port, u32 info, u8 *payload) 2871da177e4SLinus Torvalds { 2881da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 289cc70ab26SArnaldo Carvalho de Melo struct icmp6hdr *icmph = icmp6_hdr(skb); 2901da177e4SLinus Torvalds struct sock_exterr_skb *serr; 2911da177e4SLinus Torvalds 2921da177e4SLinus Torvalds if (!np->recverr) 2931da177e4SLinus Torvalds return; 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds skb = skb_clone(skb, GFP_ATOMIC); 2961da177e4SLinus Torvalds if (!skb) 2971da177e4SLinus Torvalds return; 2981da177e4SLinus Torvalds 299d40a4de0SBrian Haley skb->protocol = htons(ETH_P_IPV6); 300d40a4de0SBrian Haley 3011da177e4SLinus Torvalds serr = SKB_EXT_ERR(skb); 3021da177e4SLinus Torvalds serr->ee.ee_errno = err; 3031da177e4SLinus Torvalds serr->ee.ee_origin = SO_EE_ORIGIN_ICMP6; 3041da177e4SLinus Torvalds serr->ee.ee_type = icmph->icmp6_type; 3051da177e4SLinus Torvalds serr->ee.ee_code = icmph->icmp6_code; 3061da177e4SLinus Torvalds serr->ee.ee_pad = 0; 3071da177e4SLinus Torvalds serr->ee.ee_info = info; 3081da177e4SLinus Torvalds serr->ee.ee_data = 0; 309d56f90a7SArnaldo Carvalho de Melo serr->addr_offset = (u8 *)&(((struct ipv6hdr *)(icmph + 1))->daddr) - 310d56f90a7SArnaldo Carvalho de Melo skb_network_header(skb); 3111da177e4SLinus Torvalds serr->port = port; 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds __skb_pull(skb, payload - skb->data); 314bd82393cSArnaldo Carvalho de Melo skb_reset_transport_header(skb); 3151da177e4SLinus Torvalds 3161da177e4SLinus Torvalds if (sock_queue_err_skb(sk, skb)) 3171da177e4SLinus Torvalds kfree_skb(skb); 3181da177e4SLinus Torvalds } 3191da177e4SLinus Torvalds 3204c9483b2SDavid S. Miller void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info) 3211da177e4SLinus Torvalds { 3221c1e9d2bSEric Dumazet const struct ipv6_pinfo *np = inet6_sk(sk); 3231da177e4SLinus Torvalds struct sock_exterr_skb *serr; 3241da177e4SLinus Torvalds struct ipv6hdr *iph; 3251da177e4SLinus Torvalds struct sk_buff *skb; 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds if (!np->recverr) 3281da177e4SLinus Torvalds return; 3291da177e4SLinus Torvalds 3301da177e4SLinus Torvalds skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); 3311da177e4SLinus Torvalds if (!skb) 3321da177e4SLinus Torvalds return; 3331da177e4SLinus Torvalds 334d40a4de0SBrian Haley skb->protocol = htons(ETH_P_IPV6); 335d40a4de0SBrian Haley 3361ced98e8SArnaldo Carvalho de Melo skb_put(skb, sizeof(struct ipv6hdr)); 3371ced98e8SArnaldo Carvalho de Melo skb_reset_network_header(skb); 3380660e03fSArnaldo Carvalho de Melo iph = ipv6_hdr(skb); 3394e3fd7a0SAlexey Dobriyan iph->daddr = fl6->daddr; 3407d033c9fSEric Dumazet ip6_flow_hdr(iph, 0, 0); 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds serr = SKB_EXT_ERR(skb); 3431da177e4SLinus Torvalds serr->ee.ee_errno = err; 3441da177e4SLinus Torvalds serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL; 3451da177e4SLinus Torvalds serr->ee.ee_type = 0; 3461da177e4SLinus Torvalds serr->ee.ee_code = 0; 3471da177e4SLinus Torvalds serr->ee.ee_pad = 0; 3481da177e4SLinus Torvalds serr->ee.ee_info = info; 3491da177e4SLinus Torvalds serr->ee.ee_data = 0; 350d56f90a7SArnaldo Carvalho de Melo serr->addr_offset = (u8 *)&iph->daddr - skb_network_header(skb); 3511958b856SDavid S. Miller serr->port = fl6->fl6_dport; 3521da177e4SLinus Torvalds 35327a884dcSArnaldo Carvalho de Melo __skb_pull(skb, skb_tail_pointer(skb) - skb->data); 354bd82393cSArnaldo Carvalho de Melo skb_reset_transport_header(skb); 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds if (sock_queue_err_skb(sk, skb)) 3571da177e4SLinus Torvalds kfree_skb(skb); 3581da177e4SLinus Torvalds } 3591da177e4SLinus Torvalds 3604c9483b2SDavid S. Miller void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu) 3614b340ae2SBrian Haley { 3624b340ae2SBrian Haley struct ipv6_pinfo *np = inet6_sk(sk); 3634b340ae2SBrian Haley struct ipv6hdr *iph; 3644b340ae2SBrian Haley struct sk_buff *skb; 3654b340ae2SBrian Haley struct ip6_mtuinfo *mtu_info; 3664b340ae2SBrian Haley 3674b340ae2SBrian Haley if (!np->rxopt.bits.rxpmtu) 3684b340ae2SBrian Haley return; 3694b340ae2SBrian Haley 3704b340ae2SBrian Haley skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); 3714b340ae2SBrian Haley if (!skb) 3724b340ae2SBrian Haley return; 3734b340ae2SBrian Haley 3744b340ae2SBrian Haley skb_put(skb, sizeof(struct ipv6hdr)); 3754b340ae2SBrian Haley skb_reset_network_header(skb); 3764b340ae2SBrian Haley iph = ipv6_hdr(skb); 3774e3fd7a0SAlexey Dobriyan iph->daddr = fl6->daddr; 3784b340ae2SBrian Haley 3794b340ae2SBrian Haley mtu_info = IP6CBMTU(skb); 3804b340ae2SBrian Haley 3814b340ae2SBrian Haley mtu_info->ip6m_mtu = mtu; 3824b340ae2SBrian Haley mtu_info->ip6m_addr.sin6_family = AF_INET6; 3834b340ae2SBrian Haley mtu_info->ip6m_addr.sin6_port = 0; 3844b340ae2SBrian Haley mtu_info->ip6m_addr.sin6_flowinfo = 0; 3854c9483b2SDavid S. Miller mtu_info->ip6m_addr.sin6_scope_id = fl6->flowi6_oif; 3864e3fd7a0SAlexey Dobriyan mtu_info->ip6m_addr.sin6_addr = ipv6_hdr(skb)->daddr; 3874b340ae2SBrian Haley 3884b340ae2SBrian Haley __skb_pull(skb, skb_tail_pointer(skb) - skb->data); 3894b340ae2SBrian Haley skb_reset_transport_header(skb); 3904b340ae2SBrian Haley 3914b340ae2SBrian Haley skb = xchg(&np->rxpmtu, skb); 3924b340ae2SBrian Haley kfree_skb(skb); 3934b340ae2SBrian Haley } 3944b340ae2SBrian Haley 39534b99df4SJulian Anastasov /* For some errors we have valid addr_offset even with zero payload and 39634b99df4SJulian Anastasov * zero port. Also, addr_offset should be supported if port is set. 39734b99df4SJulian Anastasov */ 39834b99df4SJulian Anastasov static inline bool ipv6_datagram_support_addr(struct sock_exterr_skb *serr) 39934b99df4SJulian Anastasov { 40034b99df4SJulian Anastasov return serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6 || 40134b99df4SJulian Anastasov serr->ee.ee_origin == SO_EE_ORIGIN_ICMP || 40234b99df4SJulian Anastasov serr->ee.ee_origin == SO_EE_ORIGIN_LOCAL || serr->port; 40334b99df4SJulian Anastasov } 40434b99df4SJulian Anastasov 405c247f053SWillem de Bruijn /* IPv6 supports cmsg on all origins aside from SO_EE_ORIGIN_LOCAL. 406c247f053SWillem de Bruijn * 407c247f053SWillem de Bruijn * At one point, excluding local errors was a quick test to identify icmp/icmp6 408c247f053SWillem de Bruijn * errors. This is no longer true, but the test remained, so the v6 stack, 409c247f053SWillem de Bruijn * unlike v4, also honors cmsg requests on all wifi and timestamp errors. 410c247f053SWillem de Bruijn */ 411c247f053SWillem de Bruijn static bool ip6_datagram_support_cmsg(struct sk_buff *skb, 412c247f053SWillem de Bruijn struct sock_exterr_skb *serr) 413829ae9d6SWillem de Bruijn { 414c247f053SWillem de Bruijn if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP || 415c247f053SWillem de Bruijn serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6) 416c247f053SWillem de Bruijn return true; 417c247f053SWillem de Bruijn 418c247f053SWillem de Bruijn if (serr->ee.ee_origin == SO_EE_ORIGIN_LOCAL) 419c247f053SWillem de Bruijn return false; 420c247f053SWillem de Bruijn 4211862d620SWillem de Bruijn if (!IP6CB(skb)->iif) 422c247f053SWillem de Bruijn return false; 423829ae9d6SWillem de Bruijn 424c247f053SWillem de Bruijn return true; 425829ae9d6SWillem de Bruijn } 426829ae9d6SWillem de Bruijn 4271da177e4SLinus Torvalds /* 4281da177e4SLinus Torvalds * Handle MSG_ERRQUEUE 4291da177e4SLinus Torvalds */ 43085fbaa75SHannes Frederic Sowa int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) 4311da177e4SLinus Torvalds { 4321da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 4331da177e4SLinus Torvalds struct sock_exterr_skb *serr; 434364a9e93SWillem de Bruijn struct sk_buff *skb; 435342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin, msg->msg_name); 4361da177e4SLinus Torvalds struct { 4371da177e4SLinus Torvalds struct sock_extended_err ee; 4381da177e4SLinus Torvalds struct sockaddr_in6 offender; 4391da177e4SLinus Torvalds } errhdr; 4401da177e4SLinus Torvalds int err; 4411da177e4SLinus Torvalds int copied; 4421da177e4SLinus Torvalds 4431da177e4SLinus Torvalds err = -EAGAIN; 444364a9e93SWillem de Bruijn skb = sock_dequeue_err_skb(sk); 44563159f29SIan Morris if (!skb) 4461da177e4SLinus Torvalds goto out; 4471da177e4SLinus Torvalds 4481da177e4SLinus Torvalds copied = skb->len; 4491da177e4SLinus Torvalds if (copied > len) { 4501da177e4SLinus Torvalds msg->msg_flags |= MSG_TRUNC; 4511da177e4SLinus Torvalds copied = len; 4521da177e4SLinus Torvalds } 45351f3d02bSDavid S. Miller err = skb_copy_datagram_msg(skb, 0, msg, copied); 454960a2628SEric Dumazet if (unlikely(err)) { 455960a2628SEric Dumazet kfree_skb(skb); 456960a2628SEric Dumazet return err; 457960a2628SEric Dumazet } 4581da177e4SLinus Torvalds sock_recv_timestamp(msg, sk, skb); 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds serr = SKB_EXT_ERR(skb); 4611da177e4SLinus Torvalds 46234b99df4SJulian Anastasov if (sin && ipv6_datagram_support_addr(serr)) { 463d56f90a7SArnaldo Carvalho de Melo const unsigned char *nh = skb_network_header(skb); 4641da177e4SLinus Torvalds sin->sin6_family = AF_INET6; 4651da177e4SLinus Torvalds sin->sin6_flowinfo = 0; 4661da177e4SLinus Torvalds sin->sin6_port = serr->port; 467d40a4de0SBrian Haley if (skb->protocol == htons(ETH_P_IPV6)) { 4686c40d100SYOSHIFUJI Hideaki / 吉藤英明 const struct ipv6hdr *ip6h = container_of((struct in6_addr *)(nh + serr->addr_offset), 4696c40d100SYOSHIFUJI Hideaki / 吉藤英明 struct ipv6hdr, daddr); 4706c40d100SYOSHIFUJI Hideaki / 吉藤英明 sin->sin6_addr = ip6h->daddr; 4711da177e4SLinus Torvalds if (np->sndflow) 4726502ca52SYOSHIFUJI Hideaki / 吉藤英明 sin->sin6_flowinfo = ip6_flowinfo(ip6h); 473842df073SHannes Frederic Sowa sin->sin6_scope_id = 474842df073SHannes Frederic Sowa ipv6_iface_scope_id(&sin->sin6_addr, 475842df073SHannes Frederic Sowa IP6CB(skb)->iif); 4761da177e4SLinus Torvalds } else { 477b301e82cSBrian Haley ipv6_addr_set_v4mapped(*(__be32 *)(nh + serr->addr_offset), 478b301e82cSBrian Haley &sin->sin6_addr); 479842df073SHannes Frederic Sowa sin->sin6_scope_id = 0; 4801da177e4SLinus Torvalds } 48185fbaa75SHannes Frederic Sowa *addr_len = sizeof(*sin); 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err)); 4851da177e4SLinus Torvalds sin = &errhdr.offender; 486f812116bSWillem de Bruijn memset(sin, 0, sizeof(*sin)); 487c247f053SWillem de Bruijn 488c247f053SWillem de Bruijn if (ip6_datagram_support_cmsg(skb, serr)) { 4891da177e4SLinus Torvalds sin->sin6_family = AF_INET6; 490c247f053SWillem de Bruijn if (np->rxopt.all) 4914b261c75SHannes Frederic Sowa ip6_datagram_recv_common_ctl(sk, msg, skb); 492d40a4de0SBrian Haley if (skb->protocol == htons(ETH_P_IPV6)) { 4934e3fd7a0SAlexey Dobriyan sin->sin6_addr = ipv6_hdr(skb)->saddr; 4941da177e4SLinus Torvalds if (np->rxopt.all) 4954b261c75SHannes Frederic Sowa ip6_datagram_recv_specific_ctl(sk, msg, skb); 496842df073SHannes Frederic Sowa sin->sin6_scope_id = 497842df073SHannes Frederic Sowa ipv6_iface_scope_id(&sin->sin6_addr, 498842df073SHannes Frederic Sowa IP6CB(skb)->iif); 4991da177e4SLinus Torvalds } else { 500b301e82cSBrian Haley ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, 501b301e82cSBrian Haley &sin->sin6_addr); 502f812116bSWillem de Bruijn if (inet_sk(sk)->cmsg_flags) 5031da177e4SLinus Torvalds ip_cmsg_recv(msg, skb); 5041da177e4SLinus Torvalds } 5051da177e4SLinus Torvalds } 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds put_cmsg(msg, SOL_IPV6, IPV6_RECVERR, sizeof(errhdr), &errhdr); 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds /* Now we could try to dump offended packet options */ 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds msg->msg_flags |= MSG_ERRQUEUE; 5121da177e4SLinus Torvalds err = copied; 5131da177e4SLinus Torvalds 514960a2628SEric Dumazet consume_skb(skb); 5151da177e4SLinus Torvalds out: 5161da177e4SLinus Torvalds return err; 5171da177e4SLinus Torvalds } 518a495f836SChris Elston EXPORT_SYMBOL_GPL(ipv6_recv_error); 5191da177e4SLinus Torvalds 5204b340ae2SBrian Haley /* 5214b340ae2SBrian Haley * Handle IPV6_RECVPATHMTU 5224b340ae2SBrian Haley */ 52385fbaa75SHannes Frederic Sowa int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len, 52485fbaa75SHannes Frederic Sowa int *addr_len) 5254b340ae2SBrian Haley { 5264b340ae2SBrian Haley struct ipv6_pinfo *np = inet6_sk(sk); 5274b340ae2SBrian Haley struct sk_buff *skb; 5284b340ae2SBrian Haley struct ip6_mtuinfo mtu_info; 529342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin, msg->msg_name); 5304b340ae2SBrian Haley int err; 5314b340ae2SBrian Haley int copied; 5324b340ae2SBrian Haley 5334b340ae2SBrian Haley err = -EAGAIN; 5344b340ae2SBrian Haley skb = xchg(&np->rxpmtu, NULL); 53563159f29SIan Morris if (!skb) 5364b340ae2SBrian Haley goto out; 5374b340ae2SBrian Haley 5384b340ae2SBrian Haley copied = skb->len; 5394b340ae2SBrian Haley if (copied > len) { 5404b340ae2SBrian Haley msg->msg_flags |= MSG_TRUNC; 5414b340ae2SBrian Haley copied = len; 5424b340ae2SBrian Haley } 54351f3d02bSDavid S. Miller err = skb_copy_datagram_msg(skb, 0, msg, copied); 5444b340ae2SBrian Haley if (err) 5454b340ae2SBrian Haley goto out_free_skb; 5464b340ae2SBrian Haley 5474b340ae2SBrian Haley sock_recv_timestamp(msg, sk, skb); 5484b340ae2SBrian Haley 5494b340ae2SBrian Haley memcpy(&mtu_info, IP6CBMTU(skb), sizeof(mtu_info)); 5504b340ae2SBrian Haley 5514b340ae2SBrian Haley if (sin) { 5524b340ae2SBrian Haley sin->sin6_family = AF_INET6; 5534b340ae2SBrian Haley sin->sin6_flowinfo = 0; 5544b340ae2SBrian Haley sin->sin6_port = 0; 5554b340ae2SBrian Haley sin->sin6_scope_id = mtu_info.ip6m_addr.sin6_scope_id; 5564e3fd7a0SAlexey Dobriyan sin->sin6_addr = mtu_info.ip6m_addr.sin6_addr; 55785fbaa75SHannes Frederic Sowa *addr_len = sizeof(*sin); 5584b340ae2SBrian Haley } 5594b340ae2SBrian Haley 5604b340ae2SBrian Haley put_cmsg(msg, SOL_IPV6, IPV6_PATHMTU, sizeof(mtu_info), &mtu_info); 5614b340ae2SBrian Haley 5624b340ae2SBrian Haley err = copied; 5634b340ae2SBrian Haley 5644b340ae2SBrian Haley out_free_skb: 5654b340ae2SBrian Haley kfree_skb(skb); 5664b340ae2SBrian Haley out: 5674b340ae2SBrian Haley return err; 5684b340ae2SBrian Haley } 5691da177e4SLinus Torvalds 5701da177e4SLinus Torvalds 5714b261c75SHannes Frederic Sowa void ip6_datagram_recv_common_ctl(struct sock *sk, struct msghdr *msg, 5724b261c75SHannes Frederic Sowa struct sk_buff *skb) 5734b261c75SHannes Frederic Sowa { 5744b261c75SHannes Frederic Sowa struct ipv6_pinfo *np = inet6_sk(sk); 5754b261c75SHannes Frederic Sowa bool is_ipv6 = skb->protocol == htons(ETH_P_IPV6); 5764b261c75SHannes Frederic Sowa 5774b261c75SHannes Frederic Sowa if (np->rxopt.bits.rxinfo) { 5784b261c75SHannes Frederic Sowa struct in6_pktinfo src_info; 5794b261c75SHannes Frederic Sowa 5804b261c75SHannes Frederic Sowa if (is_ipv6) { 5814b261c75SHannes Frederic Sowa src_info.ipi6_ifindex = IP6CB(skb)->iif; 5824b261c75SHannes Frederic Sowa src_info.ipi6_addr = ipv6_hdr(skb)->daddr; 5834b261c75SHannes Frederic Sowa } else { 5844b261c75SHannes Frederic Sowa src_info.ipi6_ifindex = 5854b261c75SHannes Frederic Sowa PKTINFO_SKB_CB(skb)->ipi_ifindex; 5864b261c75SHannes Frederic Sowa ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr, 5874b261c75SHannes Frederic Sowa &src_info.ipi6_addr); 5884b261c75SHannes Frederic Sowa } 589829ae9d6SWillem de Bruijn 590829ae9d6SWillem de Bruijn if (src_info.ipi6_ifindex >= 0) 591829ae9d6SWillem de Bruijn put_cmsg(msg, SOL_IPV6, IPV6_PKTINFO, 592829ae9d6SWillem de Bruijn sizeof(src_info), &src_info); 5934b261c75SHannes Frederic Sowa } 5944b261c75SHannes Frederic Sowa } 5954b261c75SHannes Frederic Sowa 5964b261c75SHannes Frederic Sowa void ip6_datagram_recv_specific_ctl(struct sock *sk, struct msghdr *msg, 59773df66f8STom Parkin struct sk_buff *skb) 5981da177e4SLinus Torvalds { 5991da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 6001da177e4SLinus Torvalds struct inet6_skb_parm *opt = IP6CB(skb); 601d56f90a7SArnaldo Carvalho de Melo unsigned char *nh = skb_network_header(skb); 6021da177e4SLinus Torvalds 6031da177e4SLinus Torvalds if (np->rxopt.bits.rxhlim) { 6040660e03fSArnaldo Carvalho de Melo int hlim = ipv6_hdr(skb)->hop_limit; 6051da177e4SLinus Torvalds put_cmsg(msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds 60841a1f8eaSYOSHIFUJI Hideaki if (np->rxopt.bits.rxtclass) { 609e7219858SYOSHIFUJI Hideaki / 吉藤英明 int tclass = ipv6_get_dsfield(ipv6_hdr(skb)); 61041a1f8eaSYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); 61141a1f8eaSYOSHIFUJI Hideaki } 61241a1f8eaSYOSHIFUJI Hideaki 6136502ca52SYOSHIFUJI Hideaki / 吉藤英明 if (np->rxopt.bits.rxflow) { 6146502ca52SYOSHIFUJI Hideaki / 吉藤英明 __be32 flowinfo = ip6_flowinfo((struct ipv6hdr *)nh); 6156502ca52SYOSHIFUJI Hideaki / 吉藤英明 if (flowinfo) 6161da177e4SLinus Torvalds put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); 6171da177e4SLinus Torvalds } 618333fad53SYOSHIFUJI Hideaki 619333fad53SYOSHIFUJI Hideaki /* HbH is allowed only once */ 6208b58a398SFlorian Westphal if (np->rxopt.bits.hopopts && (opt->flags & IP6SKB_HOPBYHOP)) { 6218b58a398SFlorian Westphal u8 *ptr = nh + sizeof(struct ipv6hdr); 6221da177e4SLinus Torvalds put_cmsg(msg, SOL_IPV6, IPV6_HOPOPTS, (ptr[1]+1)<<3, ptr); 6231da177e4SLinus Torvalds } 624333fad53SYOSHIFUJI Hideaki 625333fad53SYOSHIFUJI Hideaki if (opt->lastopt && 626333fad53SYOSHIFUJI Hideaki (np->rxopt.bits.dstopts || np->rxopt.bits.srcrt)) { 627333fad53SYOSHIFUJI Hideaki /* 628333fad53SYOSHIFUJI Hideaki * Silly enough, but we need to reparse in order to 629333fad53SYOSHIFUJI Hideaki * report extension headers (except for HbH) 630333fad53SYOSHIFUJI Hideaki * in order. 631333fad53SYOSHIFUJI Hideaki * 632333fad53SYOSHIFUJI Hideaki * Also note that IPV6_RECVRTHDRDSTOPTS is NOT 633333fad53SYOSHIFUJI Hideaki * (and WILL NOT be) defined because 634333fad53SYOSHIFUJI Hideaki * IPV6_RECVDSTOPTS is more generic. --yoshfuji 635333fad53SYOSHIFUJI Hideaki */ 636333fad53SYOSHIFUJI Hideaki unsigned int off = sizeof(struct ipv6hdr); 6370660e03fSArnaldo Carvalho de Melo u8 nexthdr = ipv6_hdr(skb)->nexthdr; 638333fad53SYOSHIFUJI Hideaki 639333fad53SYOSHIFUJI Hideaki while (off <= opt->lastopt) { 64095c96174SEric Dumazet unsigned int len; 641d56f90a7SArnaldo Carvalho de Melo u8 *ptr = nh + off; 642333fad53SYOSHIFUJI Hideaki 643333fad53SYOSHIFUJI Hideaki switch (nexthdr) { 644333fad53SYOSHIFUJI Hideaki case IPPROTO_DSTOPTS: 645333fad53SYOSHIFUJI Hideaki nexthdr = ptr[0]; 646333fad53SYOSHIFUJI Hideaki len = (ptr[1] + 1) << 3; 647333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.dstopts) 648333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_DSTOPTS, len, ptr); 649333fad53SYOSHIFUJI Hideaki break; 650333fad53SYOSHIFUJI Hideaki case IPPROTO_ROUTING: 651333fad53SYOSHIFUJI Hideaki nexthdr = ptr[0]; 652333fad53SYOSHIFUJI Hideaki len = (ptr[1] + 1) << 3; 653333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.srcrt) 654333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_RTHDR, len, ptr); 655333fad53SYOSHIFUJI Hideaki break; 656333fad53SYOSHIFUJI Hideaki case IPPROTO_AH: 657333fad53SYOSHIFUJI Hideaki nexthdr = ptr[0]; 658a3059893SVille Nuorvala len = (ptr[1] + 2) << 2; 659333fad53SYOSHIFUJI Hideaki break; 660333fad53SYOSHIFUJI Hideaki default: 661333fad53SYOSHIFUJI Hideaki nexthdr = ptr[0]; 662333fad53SYOSHIFUJI Hideaki len = (ptr[1] + 1) << 3; 663333fad53SYOSHIFUJI Hideaki break; 664333fad53SYOSHIFUJI Hideaki } 665333fad53SYOSHIFUJI Hideaki 666333fad53SYOSHIFUJI Hideaki off += len; 667333fad53SYOSHIFUJI Hideaki } 668333fad53SYOSHIFUJI Hideaki } 669333fad53SYOSHIFUJI Hideaki 670333fad53SYOSHIFUJI Hideaki /* socket options in old style */ 671333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxoinfo) { 672333fad53SYOSHIFUJI Hideaki struct in6_pktinfo src_info; 673333fad53SYOSHIFUJI Hideaki 674333fad53SYOSHIFUJI Hideaki src_info.ipi6_ifindex = opt->iif; 6754e3fd7a0SAlexey Dobriyan src_info.ipi6_addr = ipv6_hdr(skb)->daddr; 676333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); 677333fad53SYOSHIFUJI Hideaki } 678333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxohlim) { 6790660e03fSArnaldo Carvalho de Melo int hlim = ipv6_hdr(skb)->hop_limit; 680333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); 681333fad53SYOSHIFUJI Hideaki } 6828b58a398SFlorian Westphal if (np->rxopt.bits.ohopopts && (opt->flags & IP6SKB_HOPBYHOP)) { 6838b58a398SFlorian Westphal u8 *ptr = nh + sizeof(struct ipv6hdr); 684333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292HOPOPTS, (ptr[1]+1)<<3, ptr); 685333fad53SYOSHIFUJI Hideaki } 686333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.odstopts && opt->dst0) { 687d56f90a7SArnaldo Carvalho de Melo u8 *ptr = nh + opt->dst0; 688333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr); 6891da177e4SLinus Torvalds } 690333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.osrcrt && opt->srcrt) { 691d56f90a7SArnaldo Carvalho de Melo struct ipv6_rt_hdr *rthdr = (struct ipv6_rt_hdr *)(nh + opt->srcrt); 692333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292RTHDR, (rthdr->hdrlen+1) << 3, rthdr); 6931da177e4SLinus Torvalds } 694333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.odstopts && opt->dst1) { 695d56f90a7SArnaldo Carvalho de Melo u8 *ptr = nh + opt->dst1; 696333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr); 6971da177e4SLinus Torvalds } 6986c468622SBalazs Scheidler if (np->rxopt.bits.rxorigdstaddr) { 6996c468622SBalazs Scheidler struct sockaddr_in6 sin6; 7004a06fa67SWillem de Bruijn __be16 _ports[2], *ports; 7016c468622SBalazs Scheidler 7024a06fa67SWillem de Bruijn ports = skb_header_pointer(skb, skb_transport_offset(skb), 7034a06fa67SWillem de Bruijn sizeof(_ports), &_ports); 7044a06fa67SWillem de Bruijn if (ports) { 7056c468622SBalazs Scheidler /* All current transport protocols have the port numbers in the 7066c468622SBalazs Scheidler * first four bytes of the transport header and this function is 7076c468622SBalazs Scheidler * written with this assumption in mind. 7086c468622SBalazs Scheidler */ 7096c468622SBalazs Scheidler sin6.sin6_family = AF_INET6; 7104e3fd7a0SAlexey Dobriyan sin6.sin6_addr = ipv6_hdr(skb)->daddr; 7116c468622SBalazs Scheidler sin6.sin6_port = ports[1]; 7126c468622SBalazs Scheidler sin6.sin6_flowinfo = 0; 7133868b7aaSHannes Frederic Sowa sin6.sin6_scope_id = 7143868b7aaSHannes Frederic Sowa ipv6_iface_scope_id(&ipv6_hdr(skb)->daddr, 7153868b7aaSHannes Frederic Sowa opt->iif); 7166c468622SBalazs Scheidler 7176c468622SBalazs Scheidler put_cmsg(msg, SOL_IPV6, IPV6_ORIGDSTADDR, sizeof(sin6), &sin6); 7186c468622SBalazs Scheidler } 7196c468622SBalazs Scheidler } 7200cc0aa61SWillem de Bruijn if (np->rxopt.bits.recvfragsize && opt->frag_max_size) { 7210cc0aa61SWillem de Bruijn int val = opt->frag_max_size; 7220cc0aa61SWillem de Bruijn 7230cc0aa61SWillem de Bruijn put_cmsg(msg, SOL_IPV6, IPV6_RECVFRAGSIZE, sizeof(val), &val); 7240cc0aa61SWillem de Bruijn } 7254b261c75SHannes Frederic Sowa } 7264b261c75SHannes Frederic Sowa 7274b261c75SHannes Frederic Sowa void ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg, 7284b261c75SHannes Frederic Sowa struct sk_buff *skb) 7294b261c75SHannes Frederic Sowa { 7304b261c75SHannes Frederic Sowa ip6_datagram_recv_common_ctl(sk, msg, skb); 7314b261c75SHannes Frederic Sowa ip6_datagram_recv_specific_ctl(sk, msg, skb); 7321da177e4SLinus Torvalds } 7338e72d37eSTom Parkin EXPORT_SYMBOL_GPL(ip6_datagram_recv_ctl); 7341da177e4SLinus Torvalds 73573df66f8STom Parkin int ip6_datagram_send_ctl(struct net *net, struct sock *sk, 7364c9483b2SDavid S. Miller struct msghdr *msg, struct flowi6 *fl6, 7375fdaa88dSWillem de Bruijn struct ipcm6_cookie *ipc6) 7381da177e4SLinus Torvalds { 7391da177e4SLinus Torvalds struct in6_pktinfo *src_info; 7401da177e4SLinus Torvalds struct cmsghdr *cmsg; 7411da177e4SLinus Torvalds struct ipv6_rt_hdr *rthdr; 7421da177e4SLinus Torvalds struct ipv6_opt_hdr *hdr; 74326879da5SWei Wang struct ipv6_txoptions *opt = ipc6->opt; 7441da177e4SLinus Torvalds int len; 7451da177e4SLinus Torvalds int err = 0; 7461da177e4SLinus Torvalds 747f95b414eSGu Zheng for_each_cmsghdr(cmsg, msg) { 7481da177e4SLinus Torvalds int addr_type; 7491da177e4SLinus Torvalds 7501da177e4SLinus Torvalds if (!CMSG_OK(msg, cmsg)) { 7511da177e4SLinus Torvalds err = -EINVAL; 7521da177e4SLinus Torvalds goto exit_f; 7531da177e4SLinus Torvalds } 7541da177e4SLinus Torvalds 755ad1e46a8SSoheil Hassas Yeganeh if (cmsg->cmsg_level == SOL_SOCKET) { 7565fdaa88dSWillem de Bruijn err = __sock_cmsg_send(sk, msg, cmsg, &ipc6->sockc); 7572632616bSEric Dumazet if (err) 7582632616bSEric Dumazet return err; 759ad1e46a8SSoheil Hassas Yeganeh continue; 760ad1e46a8SSoheil Hassas Yeganeh } 761ad1e46a8SSoheil Hassas Yeganeh 7621da177e4SLinus Torvalds if (cmsg->cmsg_level != SOL_IPV6) 7631da177e4SLinus Torvalds continue; 7641da177e4SLinus Torvalds 7651da177e4SLinus Torvalds switch (cmsg->cmsg_type) { 7661da177e4SLinus Torvalds case IPV6_PKTINFO: 767333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 768187e3838SYOSHIFUJI Hideaki { 769187e3838SYOSHIFUJI Hideaki struct net_device *dev = NULL; 7706da5b0f0SMike Manning int src_idx; 771187e3838SYOSHIFUJI Hideaki 7721da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct in6_pktinfo))) { 7731da177e4SLinus Torvalds err = -EINVAL; 7741da177e4SLinus Torvalds goto exit_f; 7751da177e4SLinus Torvalds } 7761da177e4SLinus Torvalds 7771da177e4SLinus Torvalds src_info = (struct in6_pktinfo *)CMSG_DATA(cmsg); 7786da5b0f0SMike Manning src_idx = src_info->ipi6_ifindex; 7791da177e4SLinus Torvalds 7806da5b0f0SMike Manning if (src_idx) { 7814c9483b2SDavid S. Miller if (fl6->flowi6_oif && 7826da5b0f0SMike Manning src_idx != fl6->flowi6_oif && 7836da5b0f0SMike Manning (sk->sk_bound_dev_if != fl6->flowi6_oif || 7846da5b0f0SMike Manning !sk_dev_equal_l3scope(sk, src_idx))) 7851da177e4SLinus Torvalds return -EINVAL; 7866da5b0f0SMike Manning fl6->flowi6_oif = src_idx; 7871da177e4SLinus Torvalds } 7881da177e4SLinus Torvalds 789187e3838SYOSHIFUJI Hideaki addr_type = __ipv6_addr_type(&src_info->ipi6_addr); 7901da177e4SLinus Torvalds 791536b2e92SEric Dumazet rcu_read_lock(); 7924c9483b2SDavid S. Miller if (fl6->flowi6_oif) { 7934c9483b2SDavid S. Miller dev = dev_get_by_index_rcu(net, fl6->flowi6_oif); 794536b2e92SEric Dumazet if (!dev) { 795536b2e92SEric Dumazet rcu_read_unlock(); 7961da177e4SLinus Torvalds return -ENODEV; 797536b2e92SEric Dumazet } 798536b2e92SEric Dumazet } else if (addr_type & IPV6_ADDR_LINKLOCAL) { 799536b2e92SEric Dumazet rcu_read_unlock(); 800187e3838SYOSHIFUJI Hideaki return -EINVAL; 801536b2e92SEric Dumazet } 802187e3838SYOSHIFUJI Hideaki 803187e3838SYOSHIFUJI Hideaki if (addr_type != IPV6_ADDR_ANY) { 804187e3838SYOSHIFUJI Hideaki int strict = __ipv6_addr_src_scope(addr_type) <= IPV6_ADDR_SCOPE_LINKLOCAL; 80583ba4645SVincent Bernat if (!ipv6_can_nonlocal_bind(net, inet_sk(sk)) && 806232378e8SDavid Ahern !ipv6_chk_addr_and_flags(net, &src_info->ipi6_addr, 807232378e8SDavid Ahern dev, !strict, 0, 808232378e8SDavid Ahern IFA_F_TENTATIVE) && 8097c90cc2dSFX Le Bail !ipv6_chk_acast_addr_src(net, dev, 8107c90cc2dSFX Le Bail &src_info->ipi6_addr)) 8111da177e4SLinus Torvalds err = -EINVAL; 812187e3838SYOSHIFUJI Hideaki else 8134e3fd7a0SAlexey Dobriyan fl6->saddr = src_info->ipi6_addr; 8141da177e4SLinus Torvalds } 815187e3838SYOSHIFUJI Hideaki 816536b2e92SEric Dumazet rcu_read_unlock(); 8171da177e4SLinus Torvalds 818187e3838SYOSHIFUJI Hideaki if (err) 819187e3838SYOSHIFUJI Hideaki goto exit_f; 820187e3838SYOSHIFUJI Hideaki 8211da177e4SLinus Torvalds break; 822187e3838SYOSHIFUJI Hideaki } 8231da177e4SLinus Torvalds 8241da177e4SLinus Torvalds case IPV6_FLOWINFO: 8251da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(4)) { 8261da177e4SLinus Torvalds err = -EINVAL; 8271da177e4SLinus Torvalds goto exit_f; 8281da177e4SLinus Torvalds } 8291da177e4SLinus Torvalds 8304c9483b2SDavid S. Miller if (fl6->flowlabel&IPV6_FLOWINFO_MASK) { 8314c9483b2SDavid S. Miller if ((fl6->flowlabel^*(__be32 *)CMSG_DATA(cmsg))&~IPV6_FLOWINFO_MASK) { 8321da177e4SLinus Torvalds err = -EINVAL; 8331da177e4SLinus Torvalds goto exit_f; 8341da177e4SLinus Torvalds } 8351da177e4SLinus Torvalds } 8364c9483b2SDavid S. Miller fl6->flowlabel = IPV6_FLOWINFO_MASK & *(__be32 *)CMSG_DATA(cmsg); 8371da177e4SLinus Torvalds break; 8381da177e4SLinus Torvalds 839333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 8401da177e4SLinus Torvalds case IPV6_HOPOPTS: 8411da177e4SLinus Torvalds if (opt->hopopt || cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { 8421da177e4SLinus Torvalds err = -EINVAL; 8431da177e4SLinus Torvalds goto exit_f; 8441da177e4SLinus Torvalds } 8451da177e4SLinus Torvalds 8461da177e4SLinus Torvalds hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); 8471da177e4SLinus Torvalds len = ((hdr->hdrlen + 1) << 3); 8481da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(len)) { 8491da177e4SLinus Torvalds err = -EINVAL; 8501da177e4SLinus Torvalds goto exit_f; 8511da177e4SLinus Torvalds } 852af31f412SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_RAW)) { 8531da177e4SLinus Torvalds err = -EPERM; 8541da177e4SLinus Torvalds goto exit_f; 8551da177e4SLinus Torvalds } 8561da177e4SLinus Torvalds opt->opt_nflen += len; 8571da177e4SLinus Torvalds opt->hopopt = hdr; 8581da177e4SLinus Torvalds break; 8591da177e4SLinus Torvalds 860333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 8611da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { 8621da177e4SLinus Torvalds err = -EINVAL; 8631da177e4SLinus Torvalds goto exit_f; 8641da177e4SLinus Torvalds } 8651da177e4SLinus Torvalds 8661da177e4SLinus Torvalds hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); 8671da177e4SLinus Torvalds len = ((hdr->hdrlen + 1) << 3); 8681da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(len)) { 8691da177e4SLinus Torvalds err = -EINVAL; 8701da177e4SLinus Torvalds goto exit_f; 8711da177e4SLinus Torvalds } 872af31f412SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_RAW)) { 8731da177e4SLinus Torvalds err = -EPERM; 8741da177e4SLinus Torvalds goto exit_f; 8751da177e4SLinus Torvalds } 8761da177e4SLinus Torvalds if (opt->dst1opt) { 8771da177e4SLinus Torvalds err = -EINVAL; 8781da177e4SLinus Torvalds goto exit_f; 8791da177e4SLinus Torvalds } 8801da177e4SLinus Torvalds opt->opt_flen += len; 8811da177e4SLinus Torvalds opt->dst1opt = hdr; 8821da177e4SLinus Torvalds break; 8831da177e4SLinus Torvalds 884333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 885333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 886333fad53SYOSHIFUJI Hideaki if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { 887333fad53SYOSHIFUJI Hideaki err = -EINVAL; 888333fad53SYOSHIFUJI Hideaki goto exit_f; 889333fad53SYOSHIFUJI Hideaki } 890333fad53SYOSHIFUJI Hideaki 891333fad53SYOSHIFUJI Hideaki hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); 892333fad53SYOSHIFUJI Hideaki len = ((hdr->hdrlen + 1) << 3); 893333fad53SYOSHIFUJI Hideaki if (cmsg->cmsg_len < CMSG_LEN(len)) { 894333fad53SYOSHIFUJI Hideaki err = -EINVAL; 895333fad53SYOSHIFUJI Hideaki goto exit_f; 896333fad53SYOSHIFUJI Hideaki } 897af31f412SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_RAW)) { 898333fad53SYOSHIFUJI Hideaki err = -EPERM; 899333fad53SYOSHIFUJI Hideaki goto exit_f; 900333fad53SYOSHIFUJI Hideaki } 901333fad53SYOSHIFUJI Hideaki if (cmsg->cmsg_type == IPV6_DSTOPTS) { 902333fad53SYOSHIFUJI Hideaki opt->opt_flen += len; 903333fad53SYOSHIFUJI Hideaki opt->dst1opt = hdr; 904333fad53SYOSHIFUJI Hideaki } else { 905333fad53SYOSHIFUJI Hideaki opt->opt_nflen += len; 906333fad53SYOSHIFUJI Hideaki opt->dst0opt = hdr; 907333fad53SYOSHIFUJI Hideaki } 908333fad53SYOSHIFUJI Hideaki break; 909333fad53SYOSHIFUJI Hideaki 910333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 9111da177e4SLinus Torvalds case IPV6_RTHDR: 9121da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_rt_hdr))) { 9131da177e4SLinus Torvalds err = -EINVAL; 9141da177e4SLinus Torvalds goto exit_f; 9151da177e4SLinus Torvalds } 9161da177e4SLinus Torvalds 9171da177e4SLinus Torvalds rthdr = (struct ipv6_rt_hdr *)CMSG_DATA(cmsg); 9181da177e4SLinus Torvalds 919280a9d34SMasahide NAKAMURA switch (rthdr->type) { 92007a93626SAmerigo Wang #if IS_ENABLED(CONFIG_IPV6_MIP6) 921280a9d34SMasahide NAKAMURA case IPV6_SRCRT_TYPE_2: 9226e093d9dSBrian Haley if (rthdr->hdrlen != 2 || 9236e093d9dSBrian Haley rthdr->segments_left != 1) { 9246e093d9dSBrian Haley err = -EINVAL; 9256e093d9dSBrian Haley goto exit_f; 9266e093d9dSBrian Haley } 927280a9d34SMasahide NAKAMURA break; 928bb4dbf9eSYOSHIFUJI Hideaki #endif 929280a9d34SMasahide NAKAMURA default: 9301da177e4SLinus Torvalds err = -EINVAL; 9311da177e4SLinus Torvalds goto exit_f; 9321da177e4SLinus Torvalds } 9331da177e4SLinus Torvalds 9341da177e4SLinus Torvalds len = ((rthdr->hdrlen + 1) << 3); 9351da177e4SLinus Torvalds 9361da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(len)) { 9371da177e4SLinus Torvalds err = -EINVAL; 9381da177e4SLinus Torvalds goto exit_f; 9391da177e4SLinus Torvalds } 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds /* segments left must also match */ 9421da177e4SLinus Torvalds if ((rthdr->hdrlen >> 1) != rthdr->segments_left) { 9431da177e4SLinus Torvalds err = -EINVAL; 9441da177e4SLinus Torvalds goto exit_f; 9451da177e4SLinus Torvalds } 9461da177e4SLinus Torvalds 9471da177e4SLinus Torvalds opt->opt_nflen += len; 9481da177e4SLinus Torvalds opt->srcrt = rthdr; 9491da177e4SLinus Torvalds 950333fad53SYOSHIFUJI Hideaki if (cmsg->cmsg_type == IPV6_2292RTHDR && opt->dst1opt) { 9511da177e4SLinus Torvalds int dsthdrlen = ((opt->dst1opt->hdrlen+1)<<3); 9521da177e4SLinus Torvalds 9531da177e4SLinus Torvalds opt->opt_nflen += dsthdrlen; 9541da177e4SLinus Torvalds opt->dst0opt = opt->dst1opt; 9551da177e4SLinus Torvalds opt->dst1opt = NULL; 9561da177e4SLinus Torvalds opt->opt_flen -= dsthdrlen; 9571da177e4SLinus Torvalds } 9581da177e4SLinus Torvalds 9591da177e4SLinus Torvalds break; 9601da177e4SLinus Torvalds 961333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 9621da177e4SLinus Torvalds case IPV6_HOPLIMIT: 9631da177e4SLinus Torvalds if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) { 9641da177e4SLinus Torvalds err = -EINVAL; 9651da177e4SLinus Torvalds goto exit_f; 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds 96826879da5SWei Wang ipc6->hlimit = *(int *)CMSG_DATA(cmsg); 96926879da5SWei Wang if (ipc6->hlimit < -1 || ipc6->hlimit > 0xff) { 970e8766fc8SShan Wei err = -EINVAL; 971e8766fc8SShan Wei goto exit_f; 972e8766fc8SShan Wei } 973e8766fc8SShan Wei 9741da177e4SLinus Torvalds break; 9751da177e4SLinus Torvalds 97641a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 97741a1f8eaSYOSHIFUJI Hideaki { 97841a1f8eaSYOSHIFUJI Hideaki int tc; 97941a1f8eaSYOSHIFUJI Hideaki 98041a1f8eaSYOSHIFUJI Hideaki err = -EINVAL; 981b5a4257cSEldad Zack if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) 98241a1f8eaSYOSHIFUJI Hideaki goto exit_f; 98341a1f8eaSYOSHIFUJI Hideaki 98441a1f8eaSYOSHIFUJI Hideaki tc = *(int *)CMSG_DATA(cmsg); 985d0ee011fSRemi Denis-Courmont if (tc < -1 || tc > 0xff) 98641a1f8eaSYOSHIFUJI Hideaki goto exit_f; 98741a1f8eaSYOSHIFUJI Hideaki 98841a1f8eaSYOSHIFUJI Hideaki err = 0; 98926879da5SWei Wang ipc6->tclass = tc; 99041a1f8eaSYOSHIFUJI Hideaki 99141a1f8eaSYOSHIFUJI Hideaki break; 99241a1f8eaSYOSHIFUJI Hideaki } 99313b52cd4SBrian Haley 99413b52cd4SBrian Haley case IPV6_DONTFRAG: 99513b52cd4SBrian Haley { 99613b52cd4SBrian Haley int df; 99713b52cd4SBrian Haley 99813b52cd4SBrian Haley err = -EINVAL; 999b5a4257cSEldad Zack if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) 100013b52cd4SBrian Haley goto exit_f; 100113b52cd4SBrian Haley 100213b52cd4SBrian Haley df = *(int *)CMSG_DATA(cmsg); 100313b52cd4SBrian Haley if (df < 0 || df > 1) 100413b52cd4SBrian Haley goto exit_f; 100513b52cd4SBrian Haley 100613b52cd4SBrian Haley err = 0; 100726879da5SWei Wang ipc6->dontfrag = df; 100813b52cd4SBrian Haley 100913b52cd4SBrian Haley break; 101013b52cd4SBrian Haley } 10111da177e4SLinus Torvalds default: 1012ba7a46f1SJoe Perches net_dbg_ratelimited("invalid cmsg type: %d\n", 101364ce2073SPatrick McHardy cmsg->cmsg_type); 10141da177e4SLinus Torvalds err = -EINVAL; 10154a36702eSMiao Xie goto exit_f; 10163ff50b79SStephen Hemminger } 10171da177e4SLinus Torvalds } 10181da177e4SLinus Torvalds 10191da177e4SLinus Torvalds exit_f: 10201da177e4SLinus Torvalds return err; 10211da177e4SLinus Torvalds } 102273df66f8STom Parkin EXPORT_SYMBOL_GPL(ip6_datagram_send_ctl); 102317ef66afSLorenzo Colitti 10246c206b20SPaolo Abeni void __ip6_dgram_sock_seq_show(struct seq_file *seq, struct sock *sp, 10256c206b20SPaolo Abeni __u16 srcp, __u16 destp, int rqueue, int bucket) 102617ef66afSLorenzo Colitti { 102717ef66afSLorenzo Colitti const struct in6_addr *dest, *src; 102817ef66afSLorenzo Colitti 1029efe4208fSEric Dumazet dest = &sp->sk_v6_daddr; 1030efe4208fSEric Dumazet src = &sp->sk_v6_rcv_saddr; 103117ef66afSLorenzo Colitti seq_printf(seq, 103217ef66afSLorenzo Colitti "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " 1033ea9a0379SPatrick Talbert "%02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %u\n", 103417ef66afSLorenzo Colitti bucket, 103517ef66afSLorenzo Colitti src->s6_addr32[0], src->s6_addr32[1], 103617ef66afSLorenzo Colitti src->s6_addr32[2], src->s6_addr32[3], srcp, 103717ef66afSLorenzo Colitti dest->s6_addr32[0], dest->s6_addr32[1], 103817ef66afSLorenzo Colitti dest->s6_addr32[2], dest->s6_addr32[3], destp, 103917ef66afSLorenzo Colitti sp->sk_state, 104017ef66afSLorenzo Colitti sk_wmem_alloc_get(sp), 10416c206b20SPaolo Abeni rqueue, 104217ef66afSLorenzo Colitti 0, 0L, 0, 104317ef66afSLorenzo Colitti from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), 104417ef66afSLorenzo Colitti 0, 104517ef66afSLorenzo Colitti sock_i_ino(sp), 104641c6d650SReshetova, Elena refcount_read(&sp->sk_refcnt), sp, 104717ef66afSLorenzo Colitti atomic_read(&sp->sk_drops)); 104817ef66afSLorenzo Colitti } 1049