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> 2201370434SWillem de Bruijn #include <linux/icmp.h> 231da177e4SLinus Torvalds 241da177e4SLinus Torvalds #include <net/ipv6.h> 251da177e4SLinus Torvalds #include <net/ndisc.h> 261da177e4SLinus Torvalds #include <net/addrconf.h> 271da177e4SLinus Torvalds #include <net/transp_v6.h> 281da177e4SLinus Torvalds #include <net/ip6_route.h> 29c752f073SArnaldo Carvalho de Melo #include <net/tcp_states.h> 30e7219858SYOSHIFUJI Hideaki / 吉藤英明 #include <net/dsfield.h> 31acdcecc6SWillem de Bruijn #include <net/sock_reuseport.h> 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds #include <linux/errqueue.h> 347c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 351da177e4SLinus Torvalds 36a50feda5SEric Dumazet static bool ipv6_mapped_addr_any(const struct in6_addr *a) 37c15fea2dSMax Matveev { 38a50feda5SEric Dumazet return ipv6_addr_v4mapped(a) && (a->s6_addr32[3] == 0); 39c15fea2dSMax Matveev } 40c15fea2dSMax Matveev 4180fbdb20SMartin KaFai Lau static void ip6_datagram_flow_key_init(struct flowi6 *fl6, struct sock *sk) 4280fbdb20SMartin KaFai Lau { 4380fbdb20SMartin KaFai Lau struct inet_sock *inet = inet_sk(sk); 4480fbdb20SMartin KaFai Lau struct ipv6_pinfo *np = inet6_sk(sk); 4580fbdb20SMartin KaFai Lau 4680fbdb20SMartin KaFai Lau memset(fl6, 0, sizeof(*fl6)); 4780fbdb20SMartin KaFai Lau fl6->flowi6_proto = sk->sk_protocol; 4880fbdb20SMartin KaFai Lau fl6->daddr = sk->sk_v6_daddr; 4980fbdb20SMartin KaFai Lau fl6->saddr = np->saddr; 5080fbdb20SMartin KaFai Lau fl6->flowi6_oif = sk->sk_bound_dev_if; 5180fbdb20SMartin KaFai Lau fl6->flowi6_mark = sk->sk_mark; 5280fbdb20SMartin KaFai Lau fl6->fl6_dport = inet->inet_dport; 5380fbdb20SMartin KaFai Lau fl6->fl6_sport = inet->inet_sport; 5480fbdb20SMartin KaFai Lau fl6->flowlabel = np->flow_label; 55e2d118a1SLorenzo Colitti fl6->flowi6_uid = sk->sk_uid; 5680fbdb20SMartin KaFai Lau 5780fbdb20SMartin KaFai Lau if (!fl6->flowi6_oif) 5880fbdb20SMartin KaFai Lau fl6->flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; 5980fbdb20SMartin KaFai Lau 6080fbdb20SMartin KaFai Lau if (!fl6->flowi6_oif && ipv6_addr_is_multicast(&fl6->daddr)) 6180fbdb20SMartin KaFai Lau fl6->flowi6_oif = np->mcast_oif; 6280fbdb20SMartin KaFai Lau 633df98d79SPaul Moore security_sk_classify_flow(sk, flowi6_to_flowi_common(fl6)); 6480fbdb20SMartin KaFai Lau } 6580fbdb20SMartin KaFai Lau 6633c162a9SMartin KaFai Lau int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr) 677e2040dbSMartin KaFai Lau { 687e2040dbSMartin KaFai Lau struct ip6_flowlabel *flowlabel = NULL; 697e2040dbSMartin KaFai Lau struct in6_addr *final_p, final; 707e2040dbSMartin KaFai Lau struct ipv6_txoptions *opt; 717e2040dbSMartin KaFai Lau struct dst_entry *dst; 727e2040dbSMartin KaFai Lau struct inet_sock *inet = inet_sk(sk); 737e2040dbSMartin KaFai Lau struct ipv6_pinfo *np = inet6_sk(sk); 747e2040dbSMartin KaFai Lau struct flowi6 fl6; 757e2040dbSMartin KaFai Lau int err = 0; 767e2040dbSMartin KaFai Lau 777e2040dbSMartin KaFai Lau if (np->sndflow && (np->flow_label & IPV6_FLOWLABEL_MASK)) { 787e2040dbSMartin KaFai Lau flowlabel = fl6_sock_lookup(sk, np->flow_label); 798975a3abSEric Dumazet if (IS_ERR(flowlabel)) 807e2040dbSMartin KaFai Lau return -EINVAL; 817e2040dbSMartin KaFai Lau } 827e2040dbSMartin KaFai Lau ip6_datagram_flow_key_init(&fl6, sk); 837e2040dbSMartin KaFai Lau 847e2040dbSMartin KaFai Lau rcu_read_lock(); 857e2040dbSMartin KaFai Lau opt = flowlabel ? flowlabel->opt : rcu_dereference(np->opt); 867e2040dbSMartin KaFai Lau final_p = fl6_update_dst(&fl6, opt, &final); 877e2040dbSMartin KaFai Lau rcu_read_unlock(); 887e2040dbSMartin KaFai Lau 89c4e85f73SSabrina Dubroca dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p); 907e2040dbSMartin KaFai Lau if (IS_ERR(dst)) { 917e2040dbSMartin KaFai Lau err = PTR_ERR(dst); 927e2040dbSMartin KaFai Lau goto out; 937e2040dbSMartin KaFai Lau } 947e2040dbSMartin KaFai Lau 9533c162a9SMartin KaFai Lau if (fix_sk_saddr) { 967e2040dbSMartin KaFai Lau if (ipv6_addr_any(&np->saddr)) 977e2040dbSMartin KaFai Lau np->saddr = fl6.saddr; 987e2040dbSMartin KaFai Lau 997e2040dbSMartin KaFai Lau if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { 1007e2040dbSMartin KaFai Lau sk->sk_v6_rcv_saddr = fl6.saddr; 1017e2040dbSMartin KaFai Lau inet->inet_rcv_saddr = LOOPBACK4_IPV6; 1027e2040dbSMartin KaFai Lau if (sk->sk_prot->rehash) 1037e2040dbSMartin KaFai Lau sk->sk_prot->rehash(sk); 1047e2040dbSMartin KaFai Lau } 10533c162a9SMartin KaFai Lau } 1067e2040dbSMartin KaFai Lau 1077d6850f7SAlexey Kodanev ip6_sk_dst_store_flow(sk, dst, &fl6); 1087e2040dbSMartin KaFai Lau 1097e2040dbSMartin KaFai Lau out: 1107e2040dbSMartin KaFai Lau fl6_sock_release(flowlabel); 1117e2040dbSMartin KaFai Lau return err; 1127e2040dbSMartin KaFai Lau } 1137e2040dbSMartin KaFai Lau 114e646b657SMartin KaFai Lau void ip6_datagram_release_cb(struct sock *sk) 115e646b657SMartin KaFai Lau { 116e646b657SMartin KaFai Lau struct dst_entry *dst; 117e646b657SMartin KaFai Lau 118e646b657SMartin KaFai Lau if (ipv6_addr_v4mapped(&sk->sk_v6_daddr)) 119e646b657SMartin KaFai Lau return; 120e646b657SMartin KaFai Lau 121e646b657SMartin KaFai Lau rcu_read_lock(); 122e646b657SMartin KaFai Lau dst = __sk_dst_get(sk); 123e646b657SMartin KaFai Lau if (!dst || !dst->obsolete || 124e646b657SMartin KaFai Lau dst->ops->check(dst, inet6_sk(sk)->dst_cookie)) { 125e646b657SMartin KaFai Lau rcu_read_unlock(); 126e646b657SMartin KaFai Lau return; 127e646b657SMartin KaFai Lau } 128e646b657SMartin KaFai Lau rcu_read_unlock(); 129e646b657SMartin KaFai Lau 130e646b657SMartin KaFai Lau ip6_datagram_dst_update(sk, false); 131e646b657SMartin KaFai Lau } 132e646b657SMartin KaFai Lau EXPORT_SYMBOL_GPL(ip6_datagram_release_cb); 133e646b657SMartin KaFai Lau 1340382a25aSGuillaume Nault int __ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, 1350382a25aSGuillaume Nault int addr_len) 1361da177e4SLinus Torvalds { 1371da177e4SLinus Torvalds struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr; 1381da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 1391da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 1402f987a76SPaolo Abeni struct in6_addr *daddr, old_daddr; 1412f987a76SPaolo Abeni __be32 fl6_flowlabel = 0; 1422f987a76SPaolo Abeni __be32 old_fl6_flowlabel; 1435f2fb802SStefano Brivio __be16 old_dport; 1441da177e4SLinus Torvalds int addr_type; 1451da177e4SLinus Torvalds int err; 1461da177e4SLinus Torvalds 1471da177e4SLinus Torvalds if (usin->sin6_family == AF_INET) { 14889e9c728SKuniyuki Iwashima if (ipv6_only_sock(sk)) 1491da177e4SLinus Torvalds return -EAFNOSUPPORT; 15003645a11SEric Dumazet err = __ip4_datagram_connect(sk, uaddr, addr_len); 1511da177e4SLinus Torvalds goto ipv4_connected; 1521da177e4SLinus Torvalds } 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133) 1551da177e4SLinus Torvalds return -EINVAL; 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds if (usin->sin6_family != AF_INET6) 1581da177e4SLinus Torvalds return -EAFNOSUPPORT; 1591da177e4SLinus Torvalds 1607e2040dbSMartin KaFai Lau if (np->sndflow) 16180fbdb20SMartin KaFai Lau fl6_flowlabel = usin->sin6_flowinfo & IPV6_FLOWINFO_MASK; 1621da177e4SLinus Torvalds 163052d2369SJonathan T. Leighton if (ipv6_addr_any(&usin->sin6_addr)) { 1641da177e4SLinus Torvalds /* 1651da177e4SLinus Torvalds * connect to self 1661da177e4SLinus Torvalds */ 167052d2369SJonathan T. Leighton if (ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr)) 168052d2369SJonathan T. Leighton ipv6_addr_set_v4mapped(htonl(INADDR_LOOPBACK), 169052d2369SJonathan T. Leighton &usin->sin6_addr); 170052d2369SJonathan T. Leighton else 171052d2369SJonathan T. Leighton usin->sin6_addr = in6addr_loopback; 1721da177e4SLinus Torvalds } 1731da177e4SLinus Torvalds 174052d2369SJonathan T. Leighton addr_type = ipv6_addr_type(&usin->sin6_addr); 175052d2369SJonathan T. Leighton 1761da177e4SLinus Torvalds daddr = &usin->sin6_addr; 1771da177e4SLinus Torvalds 178052d2369SJonathan T. Leighton if (addr_type & IPV6_ADDR_MAPPED) { 1791da177e4SLinus Torvalds struct sockaddr_in sin; 1801da177e4SLinus Torvalds 18189e9c728SKuniyuki Iwashima if (ipv6_only_sock(sk)) { 1821da177e4SLinus Torvalds err = -ENETUNREACH; 1831da177e4SLinus Torvalds goto out; 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds sin.sin_family = AF_INET; 1861da177e4SLinus Torvalds sin.sin_addr.s_addr = daddr->s6_addr32[3]; 1871da177e4SLinus Torvalds sin.sin_port = usin->sin6_port; 1881da177e4SLinus Torvalds 18903645a11SEric Dumazet err = __ip4_datagram_connect(sk, 1901da177e4SLinus Torvalds (struct sockaddr *) &sin, 1911da177e4SLinus Torvalds sizeof(sin)); 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds ipv4_connected: 1941da177e4SLinus Torvalds if (err) 1951da177e4SLinus Torvalds goto out; 1961da177e4SLinus Torvalds 197efe4208fSEric Dumazet ipv6_addr_set_v4mapped(inet->inet_daddr, &sk->sk_v6_daddr); 1981da177e4SLinus Torvalds 199c15fea2dSMax Matveev if (ipv6_addr_any(&np->saddr) || 200c15fea2dSMax Matveev ipv6_mapped_addr_any(&np->saddr)) 201c720c7e8SEric Dumazet ipv6_addr_set_v4mapped(inet->inet_saddr, &np->saddr); 2021da177e4SLinus Torvalds 203efe4208fSEric Dumazet if (ipv6_addr_any(&sk->sk_v6_rcv_saddr) || 204efe4208fSEric Dumazet ipv6_mapped_addr_any(&sk->sk_v6_rcv_saddr)) { 205c720c7e8SEric Dumazet ipv6_addr_set_v4mapped(inet->inet_rcv_saddr, 206efe4208fSEric Dumazet &sk->sk_v6_rcv_saddr); 207719f8358SEric Dumazet if (sk->sk_prot->rehash) 208719f8358SEric Dumazet sk->sk_prot->rehash(sk); 209719f8358SEric Dumazet } 210b301e82cSBrian Haley 2111da177e4SLinus Torvalds goto out; 2121da177e4SLinus Torvalds } 2131da177e4SLinus Torvalds 214842df073SHannes Frederic Sowa if (__ipv6_addr_needs_scope_id(addr_type)) { 2151da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) && 2161da177e4SLinus Torvalds usin->sin6_scope_id) { 21754dc3e33SDavid Ahern if (!sk_dev_equal_l3scope(sk, usin->sin6_scope_id)) { 2181da177e4SLinus Torvalds err = -EINVAL; 2191da177e4SLinus Torvalds goto out; 2201da177e4SLinus Torvalds } 2214c971d2fSEric Dumazet WRITE_ONCE(sk->sk_bound_dev_if, usin->sin6_scope_id); 2221da177e4SLinus Torvalds } 2231da177e4SLinus Torvalds 2241ac4f008SBrian Haley if (!sk->sk_bound_dev_if && (addr_type & IPV6_ADDR_MULTICAST)) 2254c971d2fSEric Dumazet WRITE_ONCE(sk->sk_bound_dev_if, np->mcast_oif); 2261ac4f008SBrian Haley 2271da177e4SLinus Torvalds /* Connect to link-local address requires an interface */ 2281da177e4SLinus Torvalds if (!sk->sk_bound_dev_if) { 2291da177e4SLinus Torvalds err = -EINVAL; 2301da177e4SLinus Torvalds goto out; 2311da177e4SLinus Torvalds } 2321da177e4SLinus Torvalds } 2331da177e4SLinus Torvalds 2342f987a76SPaolo Abeni /* save the current peer information before updating it */ 2352f987a76SPaolo Abeni old_daddr = sk->sk_v6_daddr; 2362f987a76SPaolo Abeni old_fl6_flowlabel = np->flow_label; 2372f987a76SPaolo Abeni old_dport = inet->inet_dport; 2382f987a76SPaolo Abeni 239efe4208fSEric Dumazet sk->sk_v6_daddr = *daddr; 24080fbdb20SMartin KaFai Lau np->flow_label = fl6_flowlabel; 241c720c7e8SEric Dumazet inet->inet_dport = usin->sin6_port; 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds /* 2441da177e4SLinus Torvalds * Check for a route to destination an obtain the 2451da177e4SLinus Torvalds * destination cache for it. 2461da177e4SLinus Torvalds */ 2471da177e4SLinus Torvalds 24833c162a9SMartin KaFai Lau err = ip6_datagram_dst_update(sk, true); 24985cb73ffSWei Wang if (err) { 2502f987a76SPaolo Abeni /* Restore the socket peer info, to keep it consistent with 2512f987a76SPaolo Abeni * the old socket state 25285cb73ffSWei Wang */ 2532f987a76SPaolo Abeni sk->sk_v6_daddr = old_daddr; 2542f987a76SPaolo Abeni np->flow_label = old_fl6_flowlabel; 2552f987a76SPaolo Abeni inet->inet_dport = old_dport; 2561da177e4SLinus Torvalds goto out; 25785cb73ffSWei Wang } 2581da177e4SLinus Torvalds 25969421bf9SKuniyuki Iwashima reuseport_has_conns_set(sk); 2601da177e4SLinus Torvalds sk->sk_state = TCP_ESTABLISHED; 261877d1f62STom Herbert sk_set_txhash(sk); 2621da177e4SLinus Torvalds out: 2631da177e4SLinus Torvalds return err; 2641da177e4SLinus Torvalds } 2650382a25aSGuillaume Nault EXPORT_SYMBOL_GPL(__ip6_datagram_connect); 26603645a11SEric Dumazet 26703645a11SEric Dumazet int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) 26803645a11SEric Dumazet { 26903645a11SEric Dumazet int res; 27003645a11SEric Dumazet 27103645a11SEric Dumazet lock_sock(sk); 27203645a11SEric Dumazet res = __ip6_datagram_connect(sk, uaddr, addr_len); 27303645a11SEric Dumazet release_sock(sk); 27403645a11SEric Dumazet return res; 27503645a11SEric Dumazet } 276a495f836SChris Elston EXPORT_SYMBOL_GPL(ip6_datagram_connect); 2771da177e4SLinus Torvalds 27882b276cdSHannes Frederic Sowa int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *uaddr, 27982b276cdSHannes Frederic Sowa int addr_len) 28082b276cdSHannes Frederic Sowa { 28182b276cdSHannes Frederic Sowa DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, uaddr); 28282b276cdSHannes Frederic Sowa if (sin6->sin6_family != AF_INET6) 28382b276cdSHannes Frederic Sowa return -EAFNOSUPPORT; 28482b276cdSHannes Frederic Sowa return ip6_datagram_connect(sk, uaddr, addr_len); 28582b276cdSHannes Frederic Sowa } 28682b276cdSHannes Frederic Sowa EXPORT_SYMBOL_GPL(ip6_datagram_connect_v6_only); 28782b276cdSHannes Frederic Sowa 28801370434SWillem de Bruijn static void ipv6_icmp_error_rfc4884(const struct sk_buff *skb, 28901370434SWillem de Bruijn struct sock_ee_data_rfc4884 *out) 29001370434SWillem de Bruijn { 29101370434SWillem de Bruijn switch (icmp6_hdr(skb)->icmp6_type) { 29201370434SWillem de Bruijn case ICMPV6_TIME_EXCEED: 29301370434SWillem de Bruijn case ICMPV6_DEST_UNREACH: 29401370434SWillem de Bruijn ip_icmp_error_rfc4884(skb, out, sizeof(struct icmp6hdr), 29501370434SWillem de Bruijn icmp6_hdr(skb)->icmp6_datagram_len * 8); 29601370434SWillem de Bruijn } 29701370434SWillem de Bruijn } 29801370434SWillem de Bruijn 2991da177e4SLinus Torvalds void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, 300e69a4adcSAl Viro __be16 port, u32 info, u8 *payload) 3011da177e4SLinus Torvalds { 3021da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 303cc70ab26SArnaldo Carvalho de Melo struct icmp6hdr *icmph = icmp6_hdr(skb); 3041da177e4SLinus Torvalds struct sock_exterr_skb *serr; 3051da177e4SLinus Torvalds 3061da177e4SLinus Torvalds if (!np->recverr) 3071da177e4SLinus Torvalds return; 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds skb = skb_clone(skb, GFP_ATOMIC); 3101da177e4SLinus Torvalds if (!skb) 3111da177e4SLinus Torvalds return; 3121da177e4SLinus Torvalds 313d40a4de0SBrian Haley skb->protocol = htons(ETH_P_IPV6); 314d40a4de0SBrian Haley 3151da177e4SLinus Torvalds serr = SKB_EXT_ERR(skb); 3161da177e4SLinus Torvalds serr->ee.ee_errno = err; 3171da177e4SLinus Torvalds serr->ee.ee_origin = SO_EE_ORIGIN_ICMP6; 3181da177e4SLinus Torvalds serr->ee.ee_type = icmph->icmp6_type; 3191da177e4SLinus Torvalds serr->ee.ee_code = icmph->icmp6_code; 3201da177e4SLinus Torvalds serr->ee.ee_pad = 0; 3211da177e4SLinus Torvalds serr->ee.ee_info = info; 3221da177e4SLinus Torvalds serr->ee.ee_data = 0; 323d56f90a7SArnaldo Carvalho de Melo serr->addr_offset = (u8 *)&(((struct ipv6hdr *)(icmph + 1))->daddr) - 324d56f90a7SArnaldo Carvalho de Melo skb_network_header(skb); 3251da177e4SLinus Torvalds serr->port = port; 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds __skb_pull(skb, payload - skb->data); 32801370434SWillem de Bruijn 32901370434SWillem de Bruijn if (inet6_sk(sk)->recverr_rfc4884) 33001370434SWillem de Bruijn ipv6_icmp_error_rfc4884(skb, &serr->ee.ee_rfc4884); 33101370434SWillem de Bruijn 332bd82393cSArnaldo Carvalho de Melo skb_reset_transport_header(skb); 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvalds if (sock_queue_err_skb(sk, skb)) 3351da177e4SLinus Torvalds kfree_skb(skb); 3361da177e4SLinus Torvalds } 337*42fb06b3SDavid Howells EXPORT_SYMBOL_GPL(ipv6_icmp_error); 3381da177e4SLinus Torvalds 3394c9483b2SDavid S. Miller void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info) 3401da177e4SLinus Torvalds { 3411c1e9d2bSEric Dumazet const struct ipv6_pinfo *np = inet6_sk(sk); 3421da177e4SLinus Torvalds struct sock_exterr_skb *serr; 3431da177e4SLinus Torvalds struct ipv6hdr *iph; 3441da177e4SLinus Torvalds struct sk_buff *skb; 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds if (!np->recverr) 3471da177e4SLinus Torvalds return; 3481da177e4SLinus Torvalds 3491da177e4SLinus Torvalds skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); 3501da177e4SLinus Torvalds if (!skb) 3511da177e4SLinus Torvalds return; 3521da177e4SLinus Torvalds 353d40a4de0SBrian Haley skb->protocol = htons(ETH_P_IPV6); 354d40a4de0SBrian Haley 3551ced98e8SArnaldo Carvalho de Melo skb_put(skb, sizeof(struct ipv6hdr)); 3561ced98e8SArnaldo Carvalho de Melo skb_reset_network_header(skb); 3570660e03fSArnaldo Carvalho de Melo iph = ipv6_hdr(skb); 3584e3fd7a0SAlexey Dobriyan iph->daddr = fl6->daddr; 3597d033c9fSEric Dumazet ip6_flow_hdr(iph, 0, 0); 3601da177e4SLinus Torvalds 3611da177e4SLinus Torvalds serr = SKB_EXT_ERR(skb); 3621da177e4SLinus Torvalds serr->ee.ee_errno = err; 3631da177e4SLinus Torvalds serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL; 3641da177e4SLinus Torvalds serr->ee.ee_type = 0; 3651da177e4SLinus Torvalds serr->ee.ee_code = 0; 3661da177e4SLinus Torvalds serr->ee.ee_pad = 0; 3671da177e4SLinus Torvalds serr->ee.ee_info = info; 3681da177e4SLinus Torvalds serr->ee.ee_data = 0; 369d56f90a7SArnaldo Carvalho de Melo serr->addr_offset = (u8 *)&iph->daddr - skb_network_header(skb); 3701958b856SDavid S. Miller serr->port = fl6->fl6_dport; 3711da177e4SLinus Torvalds 37227a884dcSArnaldo Carvalho de Melo __skb_pull(skb, skb_tail_pointer(skb) - skb->data); 373bd82393cSArnaldo Carvalho de Melo skb_reset_transport_header(skb); 3741da177e4SLinus Torvalds 3751da177e4SLinus Torvalds if (sock_queue_err_skb(sk, skb)) 3761da177e4SLinus Torvalds kfree_skb(skb); 3771da177e4SLinus Torvalds } 3781da177e4SLinus Torvalds 3794c9483b2SDavid S. Miller void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu) 3804b340ae2SBrian Haley { 3814b340ae2SBrian Haley struct ipv6_pinfo *np = inet6_sk(sk); 3824b340ae2SBrian Haley struct ipv6hdr *iph; 3834b340ae2SBrian Haley struct sk_buff *skb; 3844b340ae2SBrian Haley struct ip6_mtuinfo *mtu_info; 3854b340ae2SBrian Haley 3864b340ae2SBrian Haley if (!np->rxopt.bits.rxpmtu) 3874b340ae2SBrian Haley return; 3884b340ae2SBrian Haley 3894b340ae2SBrian Haley skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); 3904b340ae2SBrian Haley if (!skb) 3914b340ae2SBrian Haley return; 3924b340ae2SBrian Haley 3934b340ae2SBrian Haley skb_put(skb, sizeof(struct ipv6hdr)); 3944b340ae2SBrian Haley skb_reset_network_header(skb); 3954b340ae2SBrian Haley iph = ipv6_hdr(skb); 3964e3fd7a0SAlexey Dobriyan iph->daddr = fl6->daddr; 3974b340ae2SBrian Haley 3984b340ae2SBrian Haley mtu_info = IP6CBMTU(skb); 3994b340ae2SBrian Haley 4004b340ae2SBrian Haley mtu_info->ip6m_mtu = mtu; 4014b340ae2SBrian Haley mtu_info->ip6m_addr.sin6_family = AF_INET6; 4024b340ae2SBrian Haley mtu_info->ip6m_addr.sin6_port = 0; 4034b340ae2SBrian Haley mtu_info->ip6m_addr.sin6_flowinfo = 0; 4044c9483b2SDavid S. Miller mtu_info->ip6m_addr.sin6_scope_id = fl6->flowi6_oif; 4054e3fd7a0SAlexey Dobriyan mtu_info->ip6m_addr.sin6_addr = ipv6_hdr(skb)->daddr; 4064b340ae2SBrian Haley 4074b340ae2SBrian Haley __skb_pull(skb, skb_tail_pointer(skb) - skb->data); 4084b340ae2SBrian Haley skb_reset_transport_header(skb); 4094b340ae2SBrian Haley 4104b340ae2SBrian Haley skb = xchg(&np->rxpmtu, skb); 4114b340ae2SBrian Haley kfree_skb(skb); 4124b340ae2SBrian Haley } 4134b340ae2SBrian Haley 41434b99df4SJulian Anastasov /* For some errors we have valid addr_offset even with zero payload and 41534b99df4SJulian Anastasov * zero port. Also, addr_offset should be supported if port is set. 41634b99df4SJulian Anastasov */ 41734b99df4SJulian Anastasov static inline bool ipv6_datagram_support_addr(struct sock_exterr_skb *serr) 41834b99df4SJulian Anastasov { 41934b99df4SJulian Anastasov return serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6 || 42034b99df4SJulian Anastasov serr->ee.ee_origin == SO_EE_ORIGIN_ICMP || 42134b99df4SJulian Anastasov serr->ee.ee_origin == SO_EE_ORIGIN_LOCAL || serr->port; 42234b99df4SJulian Anastasov } 42334b99df4SJulian Anastasov 424c247f053SWillem de Bruijn /* IPv6 supports cmsg on all origins aside from SO_EE_ORIGIN_LOCAL. 425c247f053SWillem de Bruijn * 426c247f053SWillem de Bruijn * At one point, excluding local errors was a quick test to identify icmp/icmp6 427c247f053SWillem de Bruijn * errors. This is no longer true, but the test remained, so the v6 stack, 428c247f053SWillem de Bruijn * unlike v4, also honors cmsg requests on all wifi and timestamp errors. 429c247f053SWillem de Bruijn */ 430c247f053SWillem de Bruijn static bool ip6_datagram_support_cmsg(struct sk_buff *skb, 431c247f053SWillem de Bruijn struct sock_exterr_skb *serr) 432829ae9d6SWillem de Bruijn { 433c247f053SWillem de Bruijn if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP || 434c247f053SWillem de Bruijn serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6) 435c247f053SWillem de Bruijn return true; 436c247f053SWillem de Bruijn 437c247f053SWillem de Bruijn if (serr->ee.ee_origin == SO_EE_ORIGIN_LOCAL) 438c247f053SWillem de Bruijn return false; 439c247f053SWillem de Bruijn 4401862d620SWillem de Bruijn if (!IP6CB(skb)->iif) 441c247f053SWillem de Bruijn return false; 442829ae9d6SWillem de Bruijn 443c247f053SWillem de Bruijn return true; 444829ae9d6SWillem de Bruijn } 445829ae9d6SWillem de Bruijn 4461da177e4SLinus Torvalds /* 4471da177e4SLinus Torvalds * Handle MSG_ERRQUEUE 4481da177e4SLinus Torvalds */ 44985fbaa75SHannes Frederic Sowa int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) 4501da177e4SLinus Torvalds { 4511da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 4521da177e4SLinus Torvalds struct sock_exterr_skb *serr; 453364a9e93SWillem de Bruijn struct sk_buff *skb; 454342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin, msg->msg_name); 4551da177e4SLinus Torvalds struct { 4561da177e4SLinus Torvalds struct sock_extended_err ee; 4571da177e4SLinus Torvalds struct sockaddr_in6 offender; 4581da177e4SLinus Torvalds } errhdr; 4591da177e4SLinus Torvalds int err; 4601da177e4SLinus Torvalds int copied; 4611da177e4SLinus Torvalds 4621da177e4SLinus Torvalds err = -EAGAIN; 463364a9e93SWillem de Bruijn skb = sock_dequeue_err_skb(sk); 46463159f29SIan Morris if (!skb) 4651da177e4SLinus Torvalds goto out; 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds copied = skb->len; 4681da177e4SLinus Torvalds if (copied > len) { 4691da177e4SLinus Torvalds msg->msg_flags |= MSG_TRUNC; 4701da177e4SLinus Torvalds copied = len; 4711da177e4SLinus Torvalds } 47251f3d02bSDavid S. Miller err = skb_copy_datagram_msg(skb, 0, msg, copied); 473960a2628SEric Dumazet if (unlikely(err)) { 474960a2628SEric Dumazet kfree_skb(skb); 475960a2628SEric Dumazet return err; 476960a2628SEric Dumazet } 4771da177e4SLinus Torvalds sock_recv_timestamp(msg, sk, skb); 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds serr = SKB_EXT_ERR(skb); 4801da177e4SLinus Torvalds 48134b99df4SJulian Anastasov if (sin && ipv6_datagram_support_addr(serr)) { 482d56f90a7SArnaldo Carvalho de Melo const unsigned char *nh = skb_network_header(skb); 4831da177e4SLinus Torvalds sin->sin6_family = AF_INET6; 4841da177e4SLinus Torvalds sin->sin6_flowinfo = 0; 4851da177e4SLinus Torvalds sin->sin6_port = serr->port; 486d40a4de0SBrian Haley if (skb->protocol == htons(ETH_P_IPV6)) { 4876c40d100SYOSHIFUJI Hideaki / 吉藤英明 const struct ipv6hdr *ip6h = container_of((struct in6_addr *)(nh + serr->addr_offset), 4886c40d100SYOSHIFUJI Hideaki / 吉藤英明 struct ipv6hdr, daddr); 4896c40d100SYOSHIFUJI Hideaki / 吉藤英明 sin->sin6_addr = ip6h->daddr; 4901da177e4SLinus Torvalds if (np->sndflow) 4916502ca52SYOSHIFUJI Hideaki / 吉藤英明 sin->sin6_flowinfo = ip6_flowinfo(ip6h); 492842df073SHannes Frederic Sowa sin->sin6_scope_id = 493842df073SHannes Frederic Sowa ipv6_iface_scope_id(&sin->sin6_addr, 494842df073SHannes Frederic Sowa IP6CB(skb)->iif); 4951da177e4SLinus Torvalds } else { 496b301e82cSBrian Haley ipv6_addr_set_v4mapped(*(__be32 *)(nh + serr->addr_offset), 497b301e82cSBrian Haley &sin->sin6_addr); 498842df073SHannes Frederic Sowa sin->sin6_scope_id = 0; 4991da177e4SLinus Torvalds } 50085fbaa75SHannes Frederic Sowa *addr_len = sizeof(*sin); 5011da177e4SLinus Torvalds } 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err)); 5041da177e4SLinus Torvalds sin = &errhdr.offender; 505f812116bSWillem de Bruijn memset(sin, 0, sizeof(*sin)); 506c247f053SWillem de Bruijn 507c247f053SWillem de Bruijn if (ip6_datagram_support_cmsg(skb, serr)) { 5081da177e4SLinus Torvalds sin->sin6_family = AF_INET6; 509c247f053SWillem de Bruijn if (np->rxopt.all) 5104b261c75SHannes Frederic Sowa ip6_datagram_recv_common_ctl(sk, msg, skb); 511d40a4de0SBrian Haley if (skb->protocol == htons(ETH_P_IPV6)) { 5124e3fd7a0SAlexey Dobriyan sin->sin6_addr = ipv6_hdr(skb)->saddr; 5131da177e4SLinus Torvalds if (np->rxopt.all) 5144b261c75SHannes Frederic Sowa ip6_datagram_recv_specific_ctl(sk, msg, skb); 515842df073SHannes Frederic Sowa sin->sin6_scope_id = 516842df073SHannes Frederic Sowa ipv6_iface_scope_id(&sin->sin6_addr, 517842df073SHannes Frederic Sowa IP6CB(skb)->iif); 5181da177e4SLinus Torvalds } else { 519b301e82cSBrian Haley ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, 520b301e82cSBrian Haley &sin->sin6_addr); 521f812116bSWillem de Bruijn if (inet_sk(sk)->cmsg_flags) 5221da177e4SLinus Torvalds ip_cmsg_recv(msg, skb); 5231da177e4SLinus Torvalds } 5241da177e4SLinus Torvalds } 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds put_cmsg(msg, SOL_IPV6, IPV6_RECVERR, sizeof(errhdr), &errhdr); 5271da177e4SLinus Torvalds 5281da177e4SLinus Torvalds /* Now we could try to dump offended packet options */ 5291da177e4SLinus Torvalds 5301da177e4SLinus Torvalds msg->msg_flags |= MSG_ERRQUEUE; 5311da177e4SLinus Torvalds err = copied; 5321da177e4SLinus Torvalds 533960a2628SEric Dumazet consume_skb(skb); 5341da177e4SLinus Torvalds out: 5351da177e4SLinus Torvalds return err; 5361da177e4SLinus Torvalds } 537a495f836SChris Elston EXPORT_SYMBOL_GPL(ipv6_recv_error); 5381da177e4SLinus Torvalds 5394b340ae2SBrian Haley /* 5404b340ae2SBrian Haley * Handle IPV6_RECVPATHMTU 5414b340ae2SBrian Haley */ 54285fbaa75SHannes Frederic Sowa int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len, 54385fbaa75SHannes Frederic Sowa int *addr_len) 5444b340ae2SBrian Haley { 5454b340ae2SBrian Haley struct ipv6_pinfo *np = inet6_sk(sk); 5464b340ae2SBrian Haley struct sk_buff *skb; 5474b340ae2SBrian Haley struct ip6_mtuinfo mtu_info; 548342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin, msg->msg_name); 5494b340ae2SBrian Haley int err; 5504b340ae2SBrian Haley int copied; 5514b340ae2SBrian Haley 5524b340ae2SBrian Haley err = -EAGAIN; 5534b340ae2SBrian Haley skb = xchg(&np->rxpmtu, NULL); 55463159f29SIan Morris if (!skb) 5554b340ae2SBrian Haley goto out; 5564b340ae2SBrian Haley 5574b340ae2SBrian Haley copied = skb->len; 5584b340ae2SBrian Haley if (copied > len) { 5594b340ae2SBrian Haley msg->msg_flags |= MSG_TRUNC; 5604b340ae2SBrian Haley copied = len; 5614b340ae2SBrian Haley } 56251f3d02bSDavid S. Miller err = skb_copy_datagram_msg(skb, 0, msg, copied); 5634b340ae2SBrian Haley if (err) 5644b340ae2SBrian Haley goto out_free_skb; 5654b340ae2SBrian Haley 5664b340ae2SBrian Haley sock_recv_timestamp(msg, sk, skb); 5674b340ae2SBrian Haley 5684b340ae2SBrian Haley memcpy(&mtu_info, IP6CBMTU(skb), sizeof(mtu_info)); 5694b340ae2SBrian Haley 5704b340ae2SBrian Haley if (sin) { 5714b340ae2SBrian Haley sin->sin6_family = AF_INET6; 5724b340ae2SBrian Haley sin->sin6_flowinfo = 0; 5734b340ae2SBrian Haley sin->sin6_port = 0; 5744b340ae2SBrian Haley sin->sin6_scope_id = mtu_info.ip6m_addr.sin6_scope_id; 5754e3fd7a0SAlexey Dobriyan sin->sin6_addr = mtu_info.ip6m_addr.sin6_addr; 57685fbaa75SHannes Frederic Sowa *addr_len = sizeof(*sin); 5774b340ae2SBrian Haley } 5784b340ae2SBrian Haley 5794b340ae2SBrian Haley put_cmsg(msg, SOL_IPV6, IPV6_PATHMTU, sizeof(mtu_info), &mtu_info); 5804b340ae2SBrian Haley 5814b340ae2SBrian Haley err = copied; 5824b340ae2SBrian Haley 5834b340ae2SBrian Haley out_free_skb: 5844b340ae2SBrian Haley kfree_skb(skb); 5854b340ae2SBrian Haley out: 5864b340ae2SBrian Haley return err; 5874b340ae2SBrian Haley } 5881da177e4SLinus Torvalds 5891da177e4SLinus Torvalds 5904b261c75SHannes Frederic Sowa void ip6_datagram_recv_common_ctl(struct sock *sk, struct msghdr *msg, 5914b261c75SHannes Frederic Sowa struct sk_buff *skb) 5924b261c75SHannes Frederic Sowa { 5934b261c75SHannes Frederic Sowa struct ipv6_pinfo *np = inet6_sk(sk); 5944b261c75SHannes Frederic Sowa bool is_ipv6 = skb->protocol == htons(ETH_P_IPV6); 5954b261c75SHannes Frederic Sowa 5964b261c75SHannes Frederic Sowa if (np->rxopt.bits.rxinfo) { 5974b261c75SHannes Frederic Sowa struct in6_pktinfo src_info; 5984b261c75SHannes Frederic Sowa 5994b261c75SHannes Frederic Sowa if (is_ipv6) { 6004b261c75SHannes Frederic Sowa src_info.ipi6_ifindex = IP6CB(skb)->iif; 6014b261c75SHannes Frederic Sowa src_info.ipi6_addr = ipv6_hdr(skb)->daddr; 6024b261c75SHannes Frederic Sowa } else { 6034b261c75SHannes Frederic Sowa src_info.ipi6_ifindex = 6044b261c75SHannes Frederic Sowa PKTINFO_SKB_CB(skb)->ipi_ifindex; 6054b261c75SHannes Frederic Sowa ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr, 6064b261c75SHannes Frederic Sowa &src_info.ipi6_addr); 6074b261c75SHannes Frederic Sowa } 608829ae9d6SWillem de Bruijn 609829ae9d6SWillem de Bruijn if (src_info.ipi6_ifindex >= 0) 610829ae9d6SWillem de Bruijn put_cmsg(msg, SOL_IPV6, IPV6_PKTINFO, 611829ae9d6SWillem de Bruijn sizeof(src_info), &src_info); 6124b261c75SHannes Frederic Sowa } 6134b261c75SHannes Frederic Sowa } 6144b261c75SHannes Frederic Sowa 6154b261c75SHannes Frederic Sowa void ip6_datagram_recv_specific_ctl(struct sock *sk, struct msghdr *msg, 61673df66f8STom Parkin struct sk_buff *skb) 6171da177e4SLinus Torvalds { 6181da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 6191da177e4SLinus Torvalds struct inet6_skb_parm *opt = IP6CB(skb); 620d56f90a7SArnaldo Carvalho de Melo unsigned char *nh = skb_network_header(skb); 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds if (np->rxopt.bits.rxhlim) { 6230660e03fSArnaldo Carvalho de Melo int hlim = ipv6_hdr(skb)->hop_limit; 6241da177e4SLinus Torvalds put_cmsg(msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); 6251da177e4SLinus Torvalds } 6261da177e4SLinus Torvalds 62741a1f8eaSYOSHIFUJI Hideaki if (np->rxopt.bits.rxtclass) { 628e7219858SYOSHIFUJI Hideaki / 吉藤英明 int tclass = ipv6_get_dsfield(ipv6_hdr(skb)); 62941a1f8eaSYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); 63041a1f8eaSYOSHIFUJI Hideaki } 63141a1f8eaSYOSHIFUJI Hideaki 6326502ca52SYOSHIFUJI Hideaki / 吉藤英明 if (np->rxopt.bits.rxflow) { 6336502ca52SYOSHIFUJI Hideaki / 吉藤英明 __be32 flowinfo = ip6_flowinfo((struct ipv6hdr *)nh); 6346502ca52SYOSHIFUJI Hideaki / 吉藤英明 if (flowinfo) 6351da177e4SLinus Torvalds put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); 6361da177e4SLinus Torvalds } 637333fad53SYOSHIFUJI Hideaki 638333fad53SYOSHIFUJI Hideaki /* HbH is allowed only once */ 6398b58a398SFlorian Westphal if (np->rxopt.bits.hopopts && (opt->flags & IP6SKB_HOPBYHOP)) { 6408b58a398SFlorian Westphal u8 *ptr = nh + sizeof(struct ipv6hdr); 6411da177e4SLinus Torvalds put_cmsg(msg, SOL_IPV6, IPV6_HOPOPTS, (ptr[1]+1)<<3, ptr); 6421da177e4SLinus Torvalds } 643333fad53SYOSHIFUJI Hideaki 644333fad53SYOSHIFUJI Hideaki if (opt->lastopt && 645333fad53SYOSHIFUJI Hideaki (np->rxopt.bits.dstopts || np->rxopt.bits.srcrt)) { 646333fad53SYOSHIFUJI Hideaki /* 647333fad53SYOSHIFUJI Hideaki * Silly enough, but we need to reparse in order to 648333fad53SYOSHIFUJI Hideaki * report extension headers (except for HbH) 649333fad53SYOSHIFUJI Hideaki * in order. 650333fad53SYOSHIFUJI Hideaki * 651333fad53SYOSHIFUJI Hideaki * Also note that IPV6_RECVRTHDRDSTOPTS is NOT 652333fad53SYOSHIFUJI Hideaki * (and WILL NOT be) defined because 653333fad53SYOSHIFUJI Hideaki * IPV6_RECVDSTOPTS is more generic. --yoshfuji 654333fad53SYOSHIFUJI Hideaki */ 655333fad53SYOSHIFUJI Hideaki unsigned int off = sizeof(struct ipv6hdr); 6560660e03fSArnaldo Carvalho de Melo u8 nexthdr = ipv6_hdr(skb)->nexthdr; 657333fad53SYOSHIFUJI Hideaki 658333fad53SYOSHIFUJI Hideaki while (off <= opt->lastopt) { 65995c96174SEric Dumazet unsigned int len; 660d56f90a7SArnaldo Carvalho de Melo u8 *ptr = nh + off; 661333fad53SYOSHIFUJI Hideaki 662333fad53SYOSHIFUJI Hideaki switch (nexthdr) { 663333fad53SYOSHIFUJI Hideaki case IPPROTO_DSTOPTS: 664333fad53SYOSHIFUJI Hideaki nexthdr = ptr[0]; 665333fad53SYOSHIFUJI Hideaki len = (ptr[1] + 1) << 3; 666333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.dstopts) 667333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_DSTOPTS, len, ptr); 668333fad53SYOSHIFUJI Hideaki break; 669333fad53SYOSHIFUJI Hideaki case IPPROTO_ROUTING: 670333fad53SYOSHIFUJI Hideaki nexthdr = ptr[0]; 671333fad53SYOSHIFUJI Hideaki len = (ptr[1] + 1) << 3; 672333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.srcrt) 673333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_RTHDR, len, ptr); 674333fad53SYOSHIFUJI Hideaki break; 675333fad53SYOSHIFUJI Hideaki case IPPROTO_AH: 676333fad53SYOSHIFUJI Hideaki nexthdr = ptr[0]; 677a3059893SVille Nuorvala len = (ptr[1] + 2) << 2; 678333fad53SYOSHIFUJI Hideaki break; 679333fad53SYOSHIFUJI Hideaki default: 680333fad53SYOSHIFUJI Hideaki nexthdr = ptr[0]; 681333fad53SYOSHIFUJI Hideaki len = (ptr[1] + 1) << 3; 682333fad53SYOSHIFUJI Hideaki break; 683333fad53SYOSHIFUJI Hideaki } 684333fad53SYOSHIFUJI Hideaki 685333fad53SYOSHIFUJI Hideaki off += len; 686333fad53SYOSHIFUJI Hideaki } 687333fad53SYOSHIFUJI Hideaki } 688333fad53SYOSHIFUJI Hideaki 689333fad53SYOSHIFUJI Hideaki /* socket options in old style */ 690333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxoinfo) { 691333fad53SYOSHIFUJI Hideaki struct in6_pktinfo src_info; 692333fad53SYOSHIFUJI Hideaki 693333fad53SYOSHIFUJI Hideaki src_info.ipi6_ifindex = opt->iif; 6944e3fd7a0SAlexey Dobriyan src_info.ipi6_addr = ipv6_hdr(skb)->daddr; 695333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); 696333fad53SYOSHIFUJI Hideaki } 697333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.rxohlim) { 6980660e03fSArnaldo Carvalho de Melo int hlim = ipv6_hdr(skb)->hop_limit; 699333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); 700333fad53SYOSHIFUJI Hideaki } 7018b58a398SFlorian Westphal if (np->rxopt.bits.ohopopts && (opt->flags & IP6SKB_HOPBYHOP)) { 7028b58a398SFlorian Westphal u8 *ptr = nh + sizeof(struct ipv6hdr); 703333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292HOPOPTS, (ptr[1]+1)<<3, ptr); 704333fad53SYOSHIFUJI Hideaki } 705333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.odstopts && opt->dst0) { 706d56f90a7SArnaldo Carvalho de Melo u8 *ptr = nh + opt->dst0; 707333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr); 7081da177e4SLinus Torvalds } 709333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.osrcrt && opt->srcrt) { 710d56f90a7SArnaldo Carvalho de Melo struct ipv6_rt_hdr *rthdr = (struct ipv6_rt_hdr *)(nh + opt->srcrt); 711333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292RTHDR, (rthdr->hdrlen+1) << 3, rthdr); 7121da177e4SLinus Torvalds } 713333fad53SYOSHIFUJI Hideaki if (np->rxopt.bits.odstopts && opt->dst1) { 714d56f90a7SArnaldo Carvalho de Melo u8 *ptr = nh + opt->dst1; 715333fad53SYOSHIFUJI Hideaki put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr); 7161da177e4SLinus Torvalds } 7176c468622SBalazs Scheidler if (np->rxopt.bits.rxorigdstaddr) { 7186c468622SBalazs Scheidler struct sockaddr_in6 sin6; 7194a06fa67SWillem de Bruijn __be16 _ports[2], *ports; 7206c468622SBalazs Scheidler 7214a06fa67SWillem de Bruijn ports = skb_header_pointer(skb, skb_transport_offset(skb), 7224a06fa67SWillem de Bruijn sizeof(_ports), &_ports); 7234a06fa67SWillem de Bruijn if (ports) { 7246c468622SBalazs Scheidler /* All current transport protocols have the port numbers in the 7256c468622SBalazs Scheidler * first four bytes of the transport header and this function is 7266c468622SBalazs Scheidler * written with this assumption in mind. 7276c468622SBalazs Scheidler */ 7286c468622SBalazs Scheidler sin6.sin6_family = AF_INET6; 7294e3fd7a0SAlexey Dobriyan sin6.sin6_addr = ipv6_hdr(skb)->daddr; 7306c468622SBalazs Scheidler sin6.sin6_port = ports[1]; 7316c468622SBalazs Scheidler sin6.sin6_flowinfo = 0; 7323868b7aaSHannes Frederic Sowa sin6.sin6_scope_id = 7333868b7aaSHannes Frederic Sowa ipv6_iface_scope_id(&ipv6_hdr(skb)->daddr, 7343868b7aaSHannes Frederic Sowa opt->iif); 7356c468622SBalazs Scheidler 7366c468622SBalazs Scheidler put_cmsg(msg, SOL_IPV6, IPV6_ORIGDSTADDR, sizeof(sin6), &sin6); 7376c468622SBalazs Scheidler } 7386c468622SBalazs Scheidler } 7390cc0aa61SWillem de Bruijn if (np->rxopt.bits.recvfragsize && opt->frag_max_size) { 7400cc0aa61SWillem de Bruijn int val = opt->frag_max_size; 7410cc0aa61SWillem de Bruijn 7420cc0aa61SWillem de Bruijn put_cmsg(msg, SOL_IPV6, IPV6_RECVFRAGSIZE, sizeof(val), &val); 7430cc0aa61SWillem de Bruijn } 7444b261c75SHannes Frederic Sowa } 7454b261c75SHannes Frederic Sowa 7464b261c75SHannes Frederic Sowa void ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg, 7474b261c75SHannes Frederic Sowa struct sk_buff *skb) 7484b261c75SHannes Frederic Sowa { 7494b261c75SHannes Frederic Sowa ip6_datagram_recv_common_ctl(sk, msg, skb); 7504b261c75SHannes Frederic Sowa ip6_datagram_recv_specific_ctl(sk, msg, skb); 7511da177e4SLinus Torvalds } 7528e72d37eSTom Parkin EXPORT_SYMBOL_GPL(ip6_datagram_recv_ctl); 7531da177e4SLinus Torvalds 75473df66f8STom Parkin int ip6_datagram_send_ctl(struct net *net, struct sock *sk, 7554c9483b2SDavid S. Miller struct msghdr *msg, struct flowi6 *fl6, 7565fdaa88dSWillem de Bruijn struct ipcm6_cookie *ipc6) 7571da177e4SLinus Torvalds { 7581da177e4SLinus Torvalds struct in6_pktinfo *src_info; 7591da177e4SLinus Torvalds struct cmsghdr *cmsg; 7601da177e4SLinus Torvalds struct ipv6_rt_hdr *rthdr; 7611da177e4SLinus Torvalds struct ipv6_opt_hdr *hdr; 76226879da5SWei Wang struct ipv6_txoptions *opt = ipc6->opt; 7631da177e4SLinus Torvalds int len; 7641da177e4SLinus Torvalds int err = 0; 7651da177e4SLinus Torvalds 766f95b414eSGu Zheng for_each_cmsghdr(cmsg, msg) { 7671da177e4SLinus Torvalds int addr_type; 7681da177e4SLinus Torvalds 7691da177e4SLinus Torvalds if (!CMSG_OK(msg, cmsg)) { 7701da177e4SLinus Torvalds err = -EINVAL; 7711da177e4SLinus Torvalds goto exit_f; 7721da177e4SLinus Torvalds } 7731da177e4SLinus Torvalds 774ad1e46a8SSoheil Hassas Yeganeh if (cmsg->cmsg_level == SOL_SOCKET) { 775233baf9aSxu xin err = __sock_cmsg_send(sk, cmsg, &ipc6->sockc); 7762632616bSEric Dumazet if (err) 7772632616bSEric Dumazet return err; 778ad1e46a8SSoheil Hassas Yeganeh continue; 779ad1e46a8SSoheil Hassas Yeganeh } 780ad1e46a8SSoheil Hassas Yeganeh 7811da177e4SLinus Torvalds if (cmsg->cmsg_level != SOL_IPV6) 7821da177e4SLinus Torvalds continue; 7831da177e4SLinus Torvalds 7841da177e4SLinus Torvalds switch (cmsg->cmsg_type) { 7851da177e4SLinus Torvalds case IPV6_PKTINFO: 786333fad53SYOSHIFUJI Hideaki case IPV6_2292PKTINFO: 787187e3838SYOSHIFUJI Hideaki { 788187e3838SYOSHIFUJI Hideaki struct net_device *dev = NULL; 7896da5b0f0SMike Manning int src_idx; 790187e3838SYOSHIFUJI Hideaki 7911da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct in6_pktinfo))) { 7921da177e4SLinus Torvalds err = -EINVAL; 7931da177e4SLinus Torvalds goto exit_f; 7941da177e4SLinus Torvalds } 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvalds src_info = (struct in6_pktinfo *)CMSG_DATA(cmsg); 7976da5b0f0SMike Manning src_idx = src_info->ipi6_ifindex; 7981da177e4SLinus Torvalds 7996da5b0f0SMike Manning if (src_idx) { 8004c9483b2SDavid S. Miller if (fl6->flowi6_oif && 8016da5b0f0SMike Manning src_idx != fl6->flowi6_oif && 8024c971d2fSEric Dumazet (READ_ONCE(sk->sk_bound_dev_if) != fl6->flowi6_oif || 8036da5b0f0SMike Manning !sk_dev_equal_l3scope(sk, src_idx))) 8041da177e4SLinus Torvalds return -EINVAL; 8056da5b0f0SMike Manning fl6->flowi6_oif = src_idx; 8061da177e4SLinus Torvalds } 8071da177e4SLinus Torvalds 808187e3838SYOSHIFUJI Hideaki addr_type = __ipv6_addr_type(&src_info->ipi6_addr); 8091da177e4SLinus Torvalds 810536b2e92SEric Dumazet rcu_read_lock(); 8114c9483b2SDavid S. Miller if (fl6->flowi6_oif) { 8124c9483b2SDavid S. Miller dev = dev_get_by_index_rcu(net, fl6->flowi6_oif); 813536b2e92SEric Dumazet if (!dev) { 814536b2e92SEric Dumazet rcu_read_unlock(); 8151da177e4SLinus Torvalds return -ENODEV; 816536b2e92SEric Dumazet } 817536b2e92SEric Dumazet } else if (addr_type & IPV6_ADDR_LINKLOCAL) { 818536b2e92SEric Dumazet rcu_read_unlock(); 819187e3838SYOSHIFUJI Hideaki return -EINVAL; 820536b2e92SEric Dumazet } 821187e3838SYOSHIFUJI Hideaki 822187e3838SYOSHIFUJI Hideaki if (addr_type != IPV6_ADDR_ANY) { 823187e3838SYOSHIFUJI Hideaki int strict = __ipv6_addr_src_scope(addr_type) <= IPV6_ADDR_SCOPE_LINKLOCAL; 82483ba4645SVincent Bernat if (!ipv6_can_nonlocal_bind(net, inet_sk(sk)) && 825232378e8SDavid Ahern !ipv6_chk_addr_and_flags(net, &src_info->ipi6_addr, 826232378e8SDavid Ahern dev, !strict, 0, 827232378e8SDavid Ahern IFA_F_TENTATIVE) && 8287c90cc2dSFX Le Bail !ipv6_chk_acast_addr_src(net, dev, 8297c90cc2dSFX Le Bail &src_info->ipi6_addr)) 8301da177e4SLinus Torvalds err = -EINVAL; 831187e3838SYOSHIFUJI Hideaki else 8324e3fd7a0SAlexey Dobriyan fl6->saddr = src_info->ipi6_addr; 8331da177e4SLinus Torvalds } 834187e3838SYOSHIFUJI Hideaki 835536b2e92SEric Dumazet rcu_read_unlock(); 8361da177e4SLinus Torvalds 837187e3838SYOSHIFUJI Hideaki if (err) 838187e3838SYOSHIFUJI Hideaki goto exit_f; 839187e3838SYOSHIFUJI Hideaki 8401da177e4SLinus Torvalds break; 841187e3838SYOSHIFUJI Hideaki } 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvalds case IPV6_FLOWINFO: 8441da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(4)) { 8451da177e4SLinus Torvalds err = -EINVAL; 8461da177e4SLinus Torvalds goto exit_f; 8471da177e4SLinus Torvalds } 8481da177e4SLinus Torvalds 8494c9483b2SDavid S. Miller if (fl6->flowlabel&IPV6_FLOWINFO_MASK) { 8504c9483b2SDavid S. Miller if ((fl6->flowlabel^*(__be32 *)CMSG_DATA(cmsg))&~IPV6_FLOWINFO_MASK) { 8511da177e4SLinus Torvalds err = -EINVAL; 8521da177e4SLinus Torvalds goto exit_f; 8531da177e4SLinus Torvalds } 8541da177e4SLinus Torvalds } 8554c9483b2SDavid S. Miller fl6->flowlabel = IPV6_FLOWINFO_MASK & *(__be32 *)CMSG_DATA(cmsg); 8561da177e4SLinus Torvalds break; 8571da177e4SLinus Torvalds 858333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPOPTS: 8591da177e4SLinus Torvalds case IPV6_HOPOPTS: 8601da177e4SLinus Torvalds if (opt->hopopt || cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { 8611da177e4SLinus Torvalds err = -EINVAL; 8621da177e4SLinus Torvalds goto exit_f; 8631da177e4SLinus Torvalds } 8641da177e4SLinus Torvalds 8651da177e4SLinus Torvalds hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); 8661da177e4SLinus Torvalds len = ((hdr->hdrlen + 1) << 3); 8671da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(len)) { 8681da177e4SLinus Torvalds err = -EINVAL; 8691da177e4SLinus Torvalds goto exit_f; 8701da177e4SLinus Torvalds } 871af31f412SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_RAW)) { 8721da177e4SLinus Torvalds err = -EPERM; 8731da177e4SLinus Torvalds goto exit_f; 8741da177e4SLinus Torvalds } 8751da177e4SLinus Torvalds opt->opt_nflen += len; 8761da177e4SLinus Torvalds opt->hopopt = hdr; 8771da177e4SLinus Torvalds break; 8781da177e4SLinus Torvalds 879333fad53SYOSHIFUJI Hideaki case IPV6_2292DSTOPTS: 8801da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { 8811da177e4SLinus Torvalds err = -EINVAL; 8821da177e4SLinus Torvalds goto exit_f; 8831da177e4SLinus Torvalds } 8841da177e4SLinus Torvalds 8851da177e4SLinus Torvalds hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); 8861da177e4SLinus Torvalds len = ((hdr->hdrlen + 1) << 3); 8871da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(len)) { 8881da177e4SLinus Torvalds err = -EINVAL; 8891da177e4SLinus Torvalds goto exit_f; 8901da177e4SLinus Torvalds } 891af31f412SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_RAW)) { 8921da177e4SLinus Torvalds err = -EPERM; 8931da177e4SLinus Torvalds goto exit_f; 8941da177e4SLinus Torvalds } 8951da177e4SLinus Torvalds if (opt->dst1opt) { 8961da177e4SLinus Torvalds err = -EINVAL; 8971da177e4SLinus Torvalds goto exit_f; 8981da177e4SLinus Torvalds } 8991da177e4SLinus Torvalds opt->opt_flen += len; 9001da177e4SLinus Torvalds opt->dst1opt = hdr; 9011da177e4SLinus Torvalds break; 9021da177e4SLinus Torvalds 903333fad53SYOSHIFUJI Hideaki case IPV6_DSTOPTS: 904333fad53SYOSHIFUJI Hideaki case IPV6_RTHDRDSTOPTS: 905333fad53SYOSHIFUJI Hideaki if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { 906333fad53SYOSHIFUJI Hideaki err = -EINVAL; 907333fad53SYOSHIFUJI Hideaki goto exit_f; 908333fad53SYOSHIFUJI Hideaki } 909333fad53SYOSHIFUJI Hideaki 910333fad53SYOSHIFUJI Hideaki hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); 911333fad53SYOSHIFUJI Hideaki len = ((hdr->hdrlen + 1) << 3); 912333fad53SYOSHIFUJI Hideaki if (cmsg->cmsg_len < CMSG_LEN(len)) { 913333fad53SYOSHIFUJI Hideaki err = -EINVAL; 914333fad53SYOSHIFUJI Hideaki goto exit_f; 915333fad53SYOSHIFUJI Hideaki } 916af31f412SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_RAW)) { 917333fad53SYOSHIFUJI Hideaki err = -EPERM; 918333fad53SYOSHIFUJI Hideaki goto exit_f; 919333fad53SYOSHIFUJI Hideaki } 920333fad53SYOSHIFUJI Hideaki if (cmsg->cmsg_type == IPV6_DSTOPTS) { 921333fad53SYOSHIFUJI Hideaki opt->opt_flen += len; 922333fad53SYOSHIFUJI Hideaki opt->dst1opt = hdr; 923333fad53SYOSHIFUJI Hideaki } else { 924333fad53SYOSHIFUJI Hideaki opt->opt_nflen += len; 925333fad53SYOSHIFUJI Hideaki opt->dst0opt = hdr; 926333fad53SYOSHIFUJI Hideaki } 927333fad53SYOSHIFUJI Hideaki break; 928333fad53SYOSHIFUJI Hideaki 929333fad53SYOSHIFUJI Hideaki case IPV6_2292RTHDR: 9301da177e4SLinus Torvalds case IPV6_RTHDR: 9311da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_rt_hdr))) { 9321da177e4SLinus Torvalds err = -EINVAL; 9331da177e4SLinus Torvalds goto exit_f; 9341da177e4SLinus Torvalds } 9351da177e4SLinus Torvalds 9361da177e4SLinus Torvalds rthdr = (struct ipv6_rt_hdr *)CMSG_DATA(cmsg); 9371da177e4SLinus Torvalds 938280a9d34SMasahide NAKAMURA switch (rthdr->type) { 93907a93626SAmerigo Wang #if IS_ENABLED(CONFIG_IPV6_MIP6) 940280a9d34SMasahide NAKAMURA case IPV6_SRCRT_TYPE_2: 9416e093d9dSBrian Haley if (rthdr->hdrlen != 2 || 9426e093d9dSBrian Haley rthdr->segments_left != 1) { 9436e093d9dSBrian Haley err = -EINVAL; 9446e093d9dSBrian Haley goto exit_f; 9456e093d9dSBrian Haley } 946280a9d34SMasahide NAKAMURA break; 947bb4dbf9eSYOSHIFUJI Hideaki #endif 948280a9d34SMasahide NAKAMURA default: 9491da177e4SLinus Torvalds err = -EINVAL; 9501da177e4SLinus Torvalds goto exit_f; 9511da177e4SLinus Torvalds } 9521da177e4SLinus Torvalds 9531da177e4SLinus Torvalds len = ((rthdr->hdrlen + 1) << 3); 9541da177e4SLinus Torvalds 9551da177e4SLinus Torvalds if (cmsg->cmsg_len < CMSG_LEN(len)) { 9561da177e4SLinus Torvalds err = -EINVAL; 9571da177e4SLinus Torvalds goto exit_f; 9581da177e4SLinus Torvalds } 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds /* segments left must also match */ 9611da177e4SLinus Torvalds if ((rthdr->hdrlen >> 1) != rthdr->segments_left) { 9621da177e4SLinus Torvalds err = -EINVAL; 9631da177e4SLinus Torvalds goto exit_f; 9641da177e4SLinus Torvalds } 9651da177e4SLinus Torvalds 9661da177e4SLinus Torvalds opt->opt_nflen += len; 9671da177e4SLinus Torvalds opt->srcrt = rthdr; 9681da177e4SLinus Torvalds 969333fad53SYOSHIFUJI Hideaki if (cmsg->cmsg_type == IPV6_2292RTHDR && opt->dst1opt) { 9701da177e4SLinus Torvalds int dsthdrlen = ((opt->dst1opt->hdrlen+1)<<3); 9711da177e4SLinus Torvalds 9721da177e4SLinus Torvalds opt->opt_nflen += dsthdrlen; 9731da177e4SLinus Torvalds opt->dst0opt = opt->dst1opt; 9741da177e4SLinus Torvalds opt->dst1opt = NULL; 9751da177e4SLinus Torvalds opt->opt_flen -= dsthdrlen; 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds break; 9791da177e4SLinus Torvalds 980333fad53SYOSHIFUJI Hideaki case IPV6_2292HOPLIMIT: 9811da177e4SLinus Torvalds case IPV6_HOPLIMIT: 9821da177e4SLinus Torvalds if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) { 9831da177e4SLinus Torvalds err = -EINVAL; 9841da177e4SLinus Torvalds goto exit_f; 9851da177e4SLinus Torvalds } 9861da177e4SLinus Torvalds 98726879da5SWei Wang ipc6->hlimit = *(int *)CMSG_DATA(cmsg); 98826879da5SWei Wang if (ipc6->hlimit < -1 || ipc6->hlimit > 0xff) { 989e8766fc8SShan Wei err = -EINVAL; 990e8766fc8SShan Wei goto exit_f; 991e8766fc8SShan Wei } 992e8766fc8SShan Wei 9931da177e4SLinus Torvalds break; 9941da177e4SLinus Torvalds 99541a1f8eaSYOSHIFUJI Hideaki case IPV6_TCLASS: 99641a1f8eaSYOSHIFUJI Hideaki { 99741a1f8eaSYOSHIFUJI Hideaki int tc; 99841a1f8eaSYOSHIFUJI Hideaki 99941a1f8eaSYOSHIFUJI Hideaki err = -EINVAL; 1000b5a4257cSEldad Zack if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) 100141a1f8eaSYOSHIFUJI Hideaki goto exit_f; 100241a1f8eaSYOSHIFUJI Hideaki 100341a1f8eaSYOSHIFUJI Hideaki tc = *(int *)CMSG_DATA(cmsg); 1004d0ee011fSRemi Denis-Courmont if (tc < -1 || tc > 0xff) 100541a1f8eaSYOSHIFUJI Hideaki goto exit_f; 100641a1f8eaSYOSHIFUJI Hideaki 100741a1f8eaSYOSHIFUJI Hideaki err = 0; 100826879da5SWei Wang ipc6->tclass = tc; 100941a1f8eaSYOSHIFUJI Hideaki 101041a1f8eaSYOSHIFUJI Hideaki break; 101141a1f8eaSYOSHIFUJI Hideaki } 101213b52cd4SBrian Haley 101313b52cd4SBrian Haley case IPV6_DONTFRAG: 101413b52cd4SBrian Haley { 101513b52cd4SBrian Haley int df; 101613b52cd4SBrian Haley 101713b52cd4SBrian Haley err = -EINVAL; 1018b5a4257cSEldad Zack if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) 101913b52cd4SBrian Haley goto exit_f; 102013b52cd4SBrian Haley 102113b52cd4SBrian Haley df = *(int *)CMSG_DATA(cmsg); 102213b52cd4SBrian Haley if (df < 0 || df > 1) 102313b52cd4SBrian Haley goto exit_f; 102413b52cd4SBrian Haley 102513b52cd4SBrian Haley err = 0; 102626879da5SWei Wang ipc6->dontfrag = df; 102713b52cd4SBrian Haley 102813b52cd4SBrian Haley break; 102913b52cd4SBrian Haley } 10301da177e4SLinus Torvalds default: 1031ba7a46f1SJoe Perches net_dbg_ratelimited("invalid cmsg type: %d\n", 103264ce2073SPatrick McHardy cmsg->cmsg_type); 10331da177e4SLinus Torvalds err = -EINVAL; 10344a36702eSMiao Xie goto exit_f; 10353ff50b79SStephen Hemminger } 10361da177e4SLinus Torvalds } 10371da177e4SLinus Torvalds 10381da177e4SLinus Torvalds exit_f: 10391da177e4SLinus Torvalds return err; 10401da177e4SLinus Torvalds } 104173df66f8STom Parkin EXPORT_SYMBOL_GPL(ip6_datagram_send_ctl); 104217ef66afSLorenzo Colitti 10436c206b20SPaolo Abeni void __ip6_dgram_sock_seq_show(struct seq_file *seq, struct sock *sp, 10446c206b20SPaolo Abeni __u16 srcp, __u16 destp, int rqueue, int bucket) 104517ef66afSLorenzo Colitti { 104617ef66afSLorenzo Colitti const struct in6_addr *dest, *src; 104717ef66afSLorenzo Colitti 1048efe4208fSEric Dumazet dest = &sp->sk_v6_daddr; 1049efe4208fSEric Dumazet src = &sp->sk_v6_rcv_saddr; 105017ef66afSLorenzo Colitti seq_printf(seq, 105117ef66afSLorenzo Colitti "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " 1052ea9a0379SPatrick Talbert "%02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %u\n", 105317ef66afSLorenzo Colitti bucket, 105417ef66afSLorenzo Colitti src->s6_addr32[0], src->s6_addr32[1], 105517ef66afSLorenzo Colitti src->s6_addr32[2], src->s6_addr32[3], srcp, 105617ef66afSLorenzo Colitti dest->s6_addr32[0], dest->s6_addr32[1], 105717ef66afSLorenzo Colitti dest->s6_addr32[2], dest->s6_addr32[3], destp, 105817ef66afSLorenzo Colitti sp->sk_state, 105917ef66afSLorenzo Colitti sk_wmem_alloc_get(sp), 10606c206b20SPaolo Abeni rqueue, 106117ef66afSLorenzo Colitti 0, 0L, 0, 106217ef66afSLorenzo Colitti from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), 106317ef66afSLorenzo Colitti 0, 106417ef66afSLorenzo Colitti sock_i_ino(sp), 106541c6d650SReshetova, Elena refcount_read(&sp->sk_refcnt), sp, 106617ef66afSLorenzo Colitti atomic_read(&sp->sk_drops)); 106717ef66afSLorenzo Colitti } 1068