11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * RAW sockets for IPv6 31da177e4SLinus Torvalds * Linux INET6 implementation 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Authors: 61da177e4SLinus Torvalds * Pedro Roque <roque@di.fc.ul.pt> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Adapted from linux/net/ipv4/raw.c 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * Fixes: 111da177e4SLinus Torvalds * Hideaki YOSHIFUJI : sin6_scope_id support 121da177e4SLinus Torvalds * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance) 131da177e4SLinus Torvalds * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data 141da177e4SLinus Torvalds * 151da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 161da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 171da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 181da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 191da177e4SLinus Torvalds */ 201da177e4SLinus Torvalds 211da177e4SLinus Torvalds #include <linux/errno.h> 221da177e4SLinus Torvalds #include <linux/types.h> 231da177e4SLinus Torvalds #include <linux/socket.h> 241da177e4SLinus Torvalds #include <linux/sockios.h> 251da177e4SLinus Torvalds #include <linux/net.h> 261da177e4SLinus Torvalds #include <linux/in6.h> 271da177e4SLinus Torvalds #include <linux/netdevice.h> 281da177e4SLinus Torvalds #include <linux/if_arp.h> 291da177e4SLinus Torvalds #include <linux/icmpv6.h> 301da177e4SLinus Torvalds #include <linux/netfilter.h> 311da177e4SLinus Torvalds #include <linux/netfilter_ipv6.h> 323305b80cSHerbert Xu #include <linux/skbuff.h> 331da177e4SLinus Torvalds #include <asm/uaccess.h> 341da177e4SLinus Torvalds #include <asm/ioctls.h> 351da177e4SLinus Torvalds 36457c4cbcSEric W. Biederman #include <net/net_namespace.h> 371da177e4SLinus Torvalds #include <net/ip.h> 381da177e4SLinus Torvalds #include <net/sock.h> 391da177e4SLinus Torvalds #include <net/snmp.h> 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds #include <net/ipv6.h> 421da177e4SLinus Torvalds #include <net/ndisc.h> 431da177e4SLinus Torvalds #include <net/protocol.h> 441da177e4SLinus Torvalds #include <net/ip6_route.h> 451da177e4SLinus Torvalds #include <net/ip6_checksum.h> 461da177e4SLinus Torvalds #include <net/addrconf.h> 471da177e4SLinus Torvalds #include <net/transp_v6.h> 481da177e4SLinus Torvalds #include <net/udp.h> 491da177e4SLinus Torvalds #include <net/inet_common.h> 50c752f073SArnaldo Carvalho de Melo #include <net/tcp_states.h> 5159fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 527be96f76SMasahide NAKAMURA #include <net/mip6.h> 537be96f76SMasahide NAKAMURA #endif 547bc570c8SYOSHIFUJI Hideaki #include <linux/mroute6.h> 551da177e4SLinus Torvalds 56b673e4dfSPavel Emelyanov #include <net/raw.h> 571da177e4SLinus Torvalds #include <net/rawv6.h> 581da177e4SLinus Torvalds #include <net/xfrm.h> 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds #include <linux/proc_fs.h> 611da177e4SLinus Torvalds #include <linux/seq_file.h> 621da177e4SLinus Torvalds 63b673e4dfSPavel Emelyanov static struct raw_hashinfo raw_v6_hashinfo = { 64938b93adSRobert P. J. Day .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock), 65b673e4dfSPavel Emelyanov }; 661da177e4SLinus Torvalds 67be185884SPavel Emelyanov static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk, 68be185884SPavel Emelyanov unsigned short num, struct in6_addr *loc_addr, 69be185884SPavel Emelyanov struct in6_addr *rmt_addr, int dif) 701da177e4SLinus Torvalds { 711da177e4SLinus Torvalds struct hlist_node *node; 721da177e4SLinus Torvalds int is_multicast = ipv6_addr_is_multicast(loc_addr); 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds sk_for_each_from(sk, node) 751da177e4SLinus Torvalds if (inet_sk(sk)->num == num) { 761da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 771da177e4SLinus Torvalds 78878628fbSYOSHIFUJI Hideaki if (!net_eq(sock_net(sk), net)) 79be185884SPavel Emelyanov continue; 80be185884SPavel Emelyanov 811da177e4SLinus Torvalds if (!ipv6_addr_any(&np->daddr) && 821da177e4SLinus Torvalds !ipv6_addr_equal(&np->daddr, rmt_addr)) 831da177e4SLinus Torvalds continue; 841da177e4SLinus Torvalds 850bd1b59bSAndrew McDonald if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) 860bd1b59bSAndrew McDonald continue; 870bd1b59bSAndrew McDonald 881da177e4SLinus Torvalds if (!ipv6_addr_any(&np->rcv_saddr)) { 891da177e4SLinus Torvalds if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) 901da177e4SLinus Torvalds goto found; 911da177e4SLinus Torvalds if (is_multicast && 921da177e4SLinus Torvalds inet6_mc_check(sk, loc_addr, rmt_addr)) 931da177e4SLinus Torvalds goto found; 941da177e4SLinus Torvalds continue; 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds goto found; 971da177e4SLinus Torvalds } 981da177e4SLinus Torvalds sk = NULL; 991da177e4SLinus Torvalds found: 1001da177e4SLinus Torvalds return sk; 1011da177e4SLinus Torvalds } 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds /* 1041da177e4SLinus Torvalds * 0 - deliver 1051da177e4SLinus Torvalds * 1 - block 1061da177e4SLinus Torvalds */ 1071da177e4SLinus Torvalds static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) 1081da177e4SLinus Torvalds { 1091da177e4SLinus Torvalds struct icmp6hdr *icmph; 1101da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { 1131da177e4SLinus Torvalds __u32 *data = &rp->filter.data[0]; 1141da177e4SLinus Torvalds int bit_nr; 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds icmph = (struct icmp6hdr *) skb->data; 1171da177e4SLinus Torvalds bit_nr = icmph->icmp6_type; 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; 1201da177e4SLinus Torvalds } 1211da177e4SLinus Torvalds return 0; 1221da177e4SLinus Torvalds } 1231da177e4SLinus Torvalds 12459fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 12559fbb3a6SMasahide NAKAMURA static int (*mh_filter)(struct sock *sock, struct sk_buff *skb); 12659fbb3a6SMasahide NAKAMURA 12759fbb3a6SMasahide NAKAMURA int rawv6_mh_filter_register(int (*filter)(struct sock *sock, 12859fbb3a6SMasahide NAKAMURA struct sk_buff *skb)) 12959fbb3a6SMasahide NAKAMURA { 13059fbb3a6SMasahide NAKAMURA rcu_assign_pointer(mh_filter, filter); 13159fbb3a6SMasahide NAKAMURA return 0; 13259fbb3a6SMasahide NAKAMURA } 13359fbb3a6SMasahide NAKAMURA EXPORT_SYMBOL(rawv6_mh_filter_register); 13459fbb3a6SMasahide NAKAMURA 13559fbb3a6SMasahide NAKAMURA int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock, 13659fbb3a6SMasahide NAKAMURA struct sk_buff *skb)) 13759fbb3a6SMasahide NAKAMURA { 13859fbb3a6SMasahide NAKAMURA rcu_assign_pointer(mh_filter, NULL); 13959fbb3a6SMasahide NAKAMURA synchronize_rcu(); 14059fbb3a6SMasahide NAKAMURA return 0; 14159fbb3a6SMasahide NAKAMURA } 14259fbb3a6SMasahide NAKAMURA EXPORT_SYMBOL(rawv6_mh_filter_unregister); 14359fbb3a6SMasahide NAKAMURA 14459fbb3a6SMasahide NAKAMURA #endif 14559fbb3a6SMasahide NAKAMURA 1461da177e4SLinus Torvalds /* 1471da177e4SLinus Torvalds * demultiplex raw sockets. 1481da177e4SLinus Torvalds * (should consider queueing the skb in the sock receive_queue 1491da177e4SLinus Torvalds * without calling rawv6.c) 1501da177e4SLinus Torvalds * 1511da177e4SLinus Torvalds * Caller owns SKB so we must make clones. 1521da177e4SLinus Torvalds */ 15369d6da0bSPavel Emelyanov static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) 1541da177e4SLinus Torvalds { 1551da177e4SLinus Torvalds struct in6_addr *saddr; 1561da177e4SLinus Torvalds struct in6_addr *daddr; 1571da177e4SLinus Torvalds struct sock *sk; 158d13964f4SPatrick McHardy int delivered = 0; 1591da177e4SLinus Torvalds __u8 hash; 160be185884SPavel Emelyanov struct net *net; 1611da177e4SLinus Torvalds 1620660e03fSArnaldo Carvalho de Melo saddr = &ipv6_hdr(skb)->saddr; 1631da177e4SLinus Torvalds daddr = saddr + 1; 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds hash = nexthdr & (MAX_INET_PROTOS - 1); 1661da177e4SLinus Torvalds 167b673e4dfSPavel Emelyanov read_lock(&raw_v6_hashinfo.lock); 168b673e4dfSPavel Emelyanov sk = sk_head(&raw_v6_hashinfo.ht[hash]); 1691da177e4SLinus Torvalds 1701da177e4SLinus Torvalds if (sk == NULL) 1711da177e4SLinus Torvalds goto out; 1721da177e4SLinus Torvalds 173c346dca1SYOSHIFUJI Hideaki net = dev_net(skb->dev); 174be185884SPavel Emelyanov sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds while (sk) { 1777be96f76SMasahide NAKAMURA int filtered; 1787be96f76SMasahide NAKAMURA 179d13964f4SPatrick McHardy delivered = 1; 1807be96f76SMasahide NAKAMURA switch (nexthdr) { 1817be96f76SMasahide NAKAMURA case IPPROTO_ICMPV6: 1827be96f76SMasahide NAKAMURA filtered = icmpv6_filter(sk, skb); 1837be96f76SMasahide NAKAMURA break; 18459fbb3a6SMasahide NAKAMURA 18559fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 1867be96f76SMasahide NAKAMURA case IPPROTO_MH: 18759fbb3a6SMasahide NAKAMURA { 1887be96f76SMasahide NAKAMURA /* XXX: To validate MH only once for each packet, 1897be96f76SMasahide NAKAMURA * this is placed here. It should be after checking 1907be96f76SMasahide NAKAMURA * xfrm policy, however it doesn't. The checking xfrm 1917be96f76SMasahide NAKAMURA * policy is placed in rawv6_rcv() because it is 1927be96f76SMasahide NAKAMURA * required for each socket. 1937be96f76SMasahide NAKAMURA */ 19459fbb3a6SMasahide NAKAMURA int (*filter)(struct sock *sock, struct sk_buff *skb); 19559fbb3a6SMasahide NAKAMURA 19659fbb3a6SMasahide NAKAMURA filter = rcu_dereference(mh_filter); 19759fbb3a6SMasahide NAKAMURA filtered = filter ? filter(sk, skb) : 0; 1987be96f76SMasahide NAKAMURA break; 19959fbb3a6SMasahide NAKAMURA } 2007be96f76SMasahide NAKAMURA #endif 2017be96f76SMasahide NAKAMURA default: 2027be96f76SMasahide NAKAMURA filtered = 0; 2037be96f76SMasahide NAKAMURA break; 2047be96f76SMasahide NAKAMURA } 2057be96f76SMasahide NAKAMURA 2067be96f76SMasahide NAKAMURA if (filtered < 0) 2077be96f76SMasahide NAKAMURA break; 2087be96f76SMasahide NAKAMURA if (filtered == 0) { 2091da177e4SLinus Torvalds struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds /* Not releasing hash table! */ 2129fb9cbb1SYasuyuki Kozakai if (clone) { 2139fb9cbb1SYasuyuki Kozakai nf_reset(clone); 2141da177e4SLinus Torvalds rawv6_rcv(sk, clone); 2151da177e4SLinus Torvalds } 2169fb9cbb1SYasuyuki Kozakai } 217be185884SPavel Emelyanov sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr, 2182dac4b96SYOSHIFUJI Hideaki IP6CB(skb)->iif); 2191da177e4SLinus Torvalds } 2201da177e4SLinus Torvalds out: 221b673e4dfSPavel Emelyanov read_unlock(&raw_v6_hashinfo.lock); 222d13964f4SPatrick McHardy return delivered; 2231da177e4SLinus Torvalds } 2241da177e4SLinus Torvalds 22569d6da0bSPavel Emelyanov int raw6_local_deliver(struct sk_buff *skb, int nexthdr) 22669d6da0bSPavel Emelyanov { 22769d6da0bSPavel Emelyanov struct sock *raw_sk; 22869d6da0bSPavel Emelyanov 229b673e4dfSPavel Emelyanov raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]); 23069d6da0bSPavel Emelyanov if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) 23169d6da0bSPavel Emelyanov raw_sk = NULL; 23269d6da0bSPavel Emelyanov 23369d6da0bSPavel Emelyanov return raw_sk != NULL; 23469d6da0bSPavel Emelyanov } 23569d6da0bSPavel Emelyanov 2361da177e4SLinus Torvalds /* This cleans up af_inet6 a bit. -DaveM */ 2371da177e4SLinus Torvalds static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) 2381da177e4SLinus Torvalds { 2391da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 2401da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 2411da177e4SLinus Torvalds struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; 242e69a4adcSAl Viro __be32 v4addr = 0; 2431da177e4SLinus Torvalds int addr_type; 2441da177e4SLinus Torvalds int err; 2451da177e4SLinus Torvalds 2461da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133) 2471da177e4SLinus Torvalds return -EINVAL; 2481da177e4SLinus Torvalds addr_type = ipv6_addr_type(&addr->sin6_addr); 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds /* Raw sockets are IPv6 only */ 2511da177e4SLinus Torvalds if (addr_type == IPV6_ADDR_MAPPED) 2521da177e4SLinus Torvalds return(-EADDRNOTAVAIL); 2531da177e4SLinus Torvalds 2541da177e4SLinus Torvalds lock_sock(sk); 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds err = -EINVAL; 2571da177e4SLinus Torvalds if (sk->sk_state != TCP_CLOSE) 2581da177e4SLinus Torvalds goto out; 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds /* Check if the address belongs to the host. */ 2611da177e4SLinus Torvalds if (addr_type != IPV6_ADDR_ANY) { 2621da177e4SLinus Torvalds struct net_device *dev = NULL; 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds if (addr_type & IPV6_ADDR_LINKLOCAL) { 2651da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) && 2661da177e4SLinus Torvalds addr->sin6_scope_id) { 2671da177e4SLinus Torvalds /* Override any existing binding, if another 2681da177e4SLinus Torvalds * one is supplied by user. 2691da177e4SLinus Torvalds */ 2701da177e4SLinus Torvalds sk->sk_bound_dev_if = addr->sin6_scope_id; 2711da177e4SLinus Torvalds } 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds /* Binding to link-local address requires an interface */ 2741da177e4SLinus Torvalds if (!sk->sk_bound_dev_if) 2751da177e4SLinus Torvalds goto out; 2761da177e4SLinus Torvalds 2773b1e0a65SYOSHIFUJI Hideaki dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if); 2781da177e4SLinus Torvalds if (!dev) { 2791da177e4SLinus Torvalds err = -ENODEV; 2801da177e4SLinus Torvalds goto out; 2811da177e4SLinus Torvalds } 2821da177e4SLinus Torvalds } 2831da177e4SLinus Torvalds 2841da177e4SLinus Torvalds /* ipv4 addr of the socket is invalid. Only the 2851da177e4SLinus Torvalds * unspecified and mapped address have a v4 equivalent. 2861da177e4SLinus Torvalds */ 2871da177e4SLinus Torvalds v4addr = LOOPBACK4_IPV6; 2881da177e4SLinus Torvalds if (!(addr_type & IPV6_ADDR_MULTICAST)) { 2891da177e4SLinus Torvalds err = -EADDRNOTAVAIL; 2903b1e0a65SYOSHIFUJI Hideaki if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr, 291bfeade08SDaniel Lezcano dev, 0)) { 2921da177e4SLinus Torvalds if (dev) 2931da177e4SLinus Torvalds dev_put(dev); 2941da177e4SLinus Torvalds goto out; 2951da177e4SLinus Torvalds } 2961da177e4SLinus Torvalds } 2971da177e4SLinus Torvalds if (dev) 2981da177e4SLinus Torvalds dev_put(dev); 2991da177e4SLinus Torvalds } 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds inet->rcv_saddr = inet->saddr = v4addr; 3021da177e4SLinus Torvalds ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); 3031da177e4SLinus Torvalds if (!(addr_type & IPV6_ADDR_MULTICAST)) 3041da177e4SLinus Torvalds ipv6_addr_copy(&np->saddr, &addr->sin6_addr); 3051da177e4SLinus Torvalds err = 0; 3061da177e4SLinus Torvalds out: 3071da177e4SLinus Torvalds release_sock(sk); 3081da177e4SLinus Torvalds return err; 3091da177e4SLinus Torvalds } 3101da177e4SLinus Torvalds 31169d6da0bSPavel Emelyanov static void rawv6_err(struct sock *sk, struct sk_buff *skb, 3121da177e4SLinus Torvalds struct inet6_skb_parm *opt, 31304ce6909SAl Viro int type, int code, int offset, __be32 info) 3141da177e4SLinus Torvalds { 3151da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 3161da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 3171da177e4SLinus Torvalds int err; 3181da177e4SLinus Torvalds int harderr; 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds /* Report error on raw socket, if: 3211da177e4SLinus Torvalds 1. User requested recverr. 3221da177e4SLinus Torvalds 2. Socket is connected (otherwise the error indication 3231da177e4SLinus Torvalds is useless without recverr and error is hard. 3241da177e4SLinus Torvalds */ 3251da177e4SLinus Torvalds if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) 3261da177e4SLinus Torvalds return; 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds harderr = icmpv6_err_convert(type, code, &err); 3291da177e4SLinus Torvalds if (type == ICMPV6_PKT_TOOBIG) 3301da177e4SLinus Torvalds harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds if (np->recverr) { 3331da177e4SLinus Torvalds u8 *payload = skb->data; 3341da177e4SLinus Torvalds if (!inet->hdrincl) 3351da177e4SLinus Torvalds payload += offset; 3361da177e4SLinus Torvalds ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); 3371da177e4SLinus Torvalds } 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds if (np->recverr || harderr) { 3401da177e4SLinus Torvalds sk->sk_err = err; 3411da177e4SLinus Torvalds sk->sk_error_report(sk); 3421da177e4SLinus Torvalds } 3431da177e4SLinus Torvalds } 3441da177e4SLinus Torvalds 34569d6da0bSPavel Emelyanov void raw6_icmp_error(struct sk_buff *skb, int nexthdr, 34669d6da0bSPavel Emelyanov int type, int code, int inner_offset, __be32 info) 34769d6da0bSPavel Emelyanov { 34869d6da0bSPavel Emelyanov struct sock *sk; 34969d6da0bSPavel Emelyanov int hash; 35069d6da0bSPavel Emelyanov struct in6_addr *saddr, *daddr; 351be185884SPavel Emelyanov struct net *net; 35269d6da0bSPavel Emelyanov 353b673e4dfSPavel Emelyanov hash = nexthdr & (RAW_HTABLE_SIZE - 1); 35469d6da0bSPavel Emelyanov 355b673e4dfSPavel Emelyanov read_lock(&raw_v6_hashinfo.lock); 356b673e4dfSPavel Emelyanov sk = sk_head(&raw_v6_hashinfo.ht[hash]); 35769d6da0bSPavel Emelyanov if (sk != NULL) { 35805f175cdSYOSHIFUJI Hideaki /* Note: ipv6_hdr(skb) != skb->data */ 35905f175cdSYOSHIFUJI Hideaki struct ipv6hdr *ip6h = (struct ipv6hdr *)skb->data; 36005f175cdSYOSHIFUJI Hideaki saddr = &ip6h->saddr; 36105f175cdSYOSHIFUJI Hideaki daddr = &ip6h->daddr; 362c346dca1SYOSHIFUJI Hideaki net = dev_net(skb->dev); 36369d6da0bSPavel Emelyanov 364be185884SPavel Emelyanov while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr, 36569d6da0bSPavel Emelyanov IP6CB(skb)->iif))) { 36669d6da0bSPavel Emelyanov rawv6_err(sk, skb, NULL, type, code, 36769d6da0bSPavel Emelyanov inner_offset, info); 36869d6da0bSPavel Emelyanov sk = sk_next(sk); 36969d6da0bSPavel Emelyanov } 37069d6da0bSPavel Emelyanov } 371b673e4dfSPavel Emelyanov read_unlock(&raw_v6_hashinfo.lock); 37269d6da0bSPavel Emelyanov } 37369d6da0bSPavel Emelyanov 3741da177e4SLinus Torvalds static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) 3751da177e4SLinus Torvalds { 3761da177e4SLinus Torvalds if ((raw6_sk(sk)->checksum || sk->sk_filter) && 377fb286bb2SHerbert Xu skb_checksum_complete(skb)) { 378a92aa318SWang Chen atomic_inc(&sk->sk_drops); 3791da177e4SLinus Torvalds kfree_skb(skb); 3803cc76caaSYang Hongyang return NET_RX_DROP; 3811da177e4SLinus Torvalds } 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds /* Charge it to the socket. */ 3841da177e4SLinus Torvalds if (sock_queue_rcv_skb(sk,skb)<0) { 385a92aa318SWang Chen atomic_inc(&sk->sk_drops); 3861da177e4SLinus Torvalds kfree_skb(skb); 3873cc76caaSYang Hongyang return NET_RX_DROP; 3881da177e4SLinus Torvalds } 3891da177e4SLinus Torvalds 3901da177e4SLinus Torvalds return 0; 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds /* 3941da177e4SLinus Torvalds * This is next to useless... 3951da177e4SLinus Torvalds * if we demultiplex in network layer we don't need the extra call 3961da177e4SLinus Torvalds * just to queue the skb... 3971da177e4SLinus Torvalds * maybe we could have the network decide upon a hint if it 3981da177e4SLinus Torvalds * should call raw_rcv for demultiplexing 3991da177e4SLinus Torvalds */ 4001da177e4SLinus Torvalds int rawv6_rcv(struct sock *sk, struct sk_buff *skb) 4011da177e4SLinus Torvalds { 4021da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 4031da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 4041da177e4SLinus Torvalds 4051da177e4SLinus Torvalds if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { 406a92aa318SWang Chen atomic_inc(&sk->sk_drops); 4071da177e4SLinus Torvalds kfree_skb(skb); 4081da177e4SLinus Torvalds return NET_RX_DROP; 4091da177e4SLinus Torvalds } 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds if (!rp->checksum) 4121da177e4SLinus Torvalds skb->ip_summed = CHECKSUM_UNNECESSARY; 4131da177e4SLinus Torvalds 41484fa7933SPatrick McHardy if (skb->ip_summed == CHECKSUM_COMPLETE) { 415d56f90a7SArnaldo Carvalho de Melo skb_postpull_rcsum(skb, skb_network_header(skb), 416cfe1fc77SArnaldo Carvalho de Melo skb_network_header_len(skb)); 4170660e03fSArnaldo Carvalho de Melo if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 4180660e03fSArnaldo Carvalho de Melo &ipv6_hdr(skb)->daddr, 419fb286bb2SHerbert Xu skb->len, inet->num, skb->csum)) 420fb286bb2SHerbert Xu skb->ip_summed = CHECKSUM_UNNECESSARY; 4211da177e4SLinus Torvalds } 42260476372SHerbert Xu if (!skb_csum_unnecessary(skb)) 4230660e03fSArnaldo Carvalho de Melo skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 4240660e03fSArnaldo Carvalho de Melo &ipv6_hdr(skb)->daddr, 4250660e03fSArnaldo Carvalho de Melo skb->len, 4260660e03fSArnaldo Carvalho de Melo inet->num, 0)); 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds if (inet->hdrincl) { 429fb286bb2SHerbert Xu if (skb_checksum_complete(skb)) { 430a92aa318SWang Chen atomic_inc(&sk->sk_drops); 4311da177e4SLinus Torvalds kfree_skb(skb); 4323cc76caaSYang Hongyang return NET_RX_DROP; 4331da177e4SLinus Torvalds } 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds rawv6_rcv_skb(sk, skb); 4371da177e4SLinus Torvalds return 0; 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds /* 4421da177e4SLinus Torvalds * This should be easy, if there is something there 4431da177e4SLinus Torvalds * we return it, otherwise we block. 4441da177e4SLinus Torvalds */ 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, 4471da177e4SLinus Torvalds struct msghdr *msg, size_t len, 4481da177e4SLinus Torvalds int noblock, int flags, int *addr_len) 4491da177e4SLinus Torvalds { 4501da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 4511da177e4SLinus Torvalds struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; 4521da177e4SLinus Torvalds struct sk_buff *skb; 4531da177e4SLinus Torvalds size_t copied; 4541da177e4SLinus Torvalds int err; 4551da177e4SLinus Torvalds 4561da177e4SLinus Torvalds if (flags & MSG_OOB) 4571da177e4SLinus Torvalds return -EOPNOTSUPP; 4581da177e4SLinus Torvalds 4591da177e4SLinus Torvalds if (addr_len) 4601da177e4SLinus Torvalds *addr_len=sizeof(*sin6); 4611da177e4SLinus Torvalds 4621da177e4SLinus Torvalds if (flags & MSG_ERRQUEUE) 4631da177e4SLinus Torvalds return ipv6_recv_error(sk, msg, len); 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds skb = skb_recv_datagram(sk, flags, noblock, &err); 4661da177e4SLinus Torvalds if (!skb) 4671da177e4SLinus Torvalds goto out; 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds copied = skb->len; 4701da177e4SLinus Torvalds if (copied > len) { 4711da177e4SLinus Torvalds copied = len; 4721da177e4SLinus Torvalds msg->msg_flags |= MSG_TRUNC; 4731da177e4SLinus Torvalds } 4741da177e4SLinus Torvalds 47560476372SHerbert Xu if (skb_csum_unnecessary(skb)) { 4761da177e4SLinus Torvalds err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 4771da177e4SLinus Torvalds } else if (msg->msg_flags&MSG_TRUNC) { 478fb286bb2SHerbert Xu if (__skb_checksum_complete(skb)) 4791da177e4SLinus Torvalds goto csum_copy_err; 4801da177e4SLinus Torvalds err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 4811da177e4SLinus Torvalds } else { 4821da177e4SLinus Torvalds err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); 4831da177e4SLinus Torvalds if (err == -EINVAL) 4841da177e4SLinus Torvalds goto csum_copy_err; 4851da177e4SLinus Torvalds } 4861da177e4SLinus Torvalds if (err) 4871da177e4SLinus Torvalds goto out_free; 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds /* Copy the address. */ 4901da177e4SLinus Torvalds if (sin6) { 4911da177e4SLinus Torvalds sin6->sin6_family = AF_INET6; 492f59fc7f3STetsuo Handa sin6->sin6_port = 0; 4930660e03fSArnaldo Carvalho de Melo ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); 4941da177e4SLinus Torvalds sin6->sin6_flowinfo = 0; 4951da177e4SLinus Torvalds sin6->sin6_scope_id = 0; 4961da177e4SLinus Torvalds if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) 4971da177e4SLinus Torvalds sin6->sin6_scope_id = IP6CB(skb)->iif; 4981da177e4SLinus Torvalds } 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds sock_recv_timestamp(msg, sk, skb); 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds if (np->rxopt.all) 5031da177e4SLinus Torvalds datagram_recv_ctl(sk, msg, skb); 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds err = copied; 5061da177e4SLinus Torvalds if (flags & MSG_TRUNC) 5071da177e4SLinus Torvalds err = skb->len; 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds out_free: 5101da177e4SLinus Torvalds skb_free_datagram(sk, skb); 5111da177e4SLinus Torvalds out: 5121da177e4SLinus Torvalds return err; 5131da177e4SLinus Torvalds 5141da177e4SLinus Torvalds csum_copy_err: 5153305b80cSHerbert Xu skb_kill_datagram(sk, skb, flags); 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds /* Error for blocking case is chosen to masquerade 5181da177e4SLinus Torvalds as some normal condition. 5191da177e4SLinus Torvalds */ 5201da177e4SLinus Torvalds err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; 521a92aa318SWang Chen atomic_inc(&sk->sk_drops); 5223305b80cSHerbert Xu goto out; 5231da177e4SLinus Torvalds } 5241da177e4SLinus Torvalds 5251da177e4SLinus Torvalds static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, 526357b40a1SHerbert Xu struct raw6_sock *rp) 5271da177e4SLinus Torvalds { 5281da177e4SLinus Torvalds struct sk_buff *skb; 5291da177e4SLinus Torvalds int err = 0; 530357b40a1SHerbert Xu int offset; 531357b40a1SHerbert Xu int len; 532679a8738SHerbert Xu int total_len; 533868c86bcSAl Viro __wsum tmp_csum; 534868c86bcSAl Viro __sum16 csum; 5351da177e4SLinus Torvalds 5361da177e4SLinus Torvalds if (!rp->checksum) 5371da177e4SLinus Torvalds goto send; 5381da177e4SLinus Torvalds 5391da177e4SLinus Torvalds if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) 5401da177e4SLinus Torvalds goto out; 5411da177e4SLinus Torvalds 542357b40a1SHerbert Xu offset = rp->offset; 543d56f90a7SArnaldo Carvalho de Melo total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) - 544d56f90a7SArnaldo Carvalho de Melo skb->data); 545679a8738SHerbert Xu if (offset >= total_len - 1) { 5461da177e4SLinus Torvalds err = -EINVAL; 547357b40a1SHerbert Xu ip6_flush_pending_frames(sk); 5481da177e4SLinus Torvalds goto out; 5491da177e4SLinus Torvalds } 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds /* should be check HW csum miyazawa */ 5521da177e4SLinus Torvalds if (skb_queue_len(&sk->sk_write_queue) == 1) { 5531da177e4SLinus Torvalds /* 5541da177e4SLinus Torvalds * Only one fragment on the socket. 5551da177e4SLinus Torvalds */ 5561da177e4SLinus Torvalds tmp_csum = skb->csum; 5571da177e4SLinus Torvalds } else { 558357b40a1SHerbert Xu struct sk_buff *csum_skb = NULL; 5591da177e4SLinus Torvalds tmp_csum = 0; 5601da177e4SLinus Torvalds 5611da177e4SLinus Torvalds skb_queue_walk(&sk->sk_write_queue, skb) { 5621da177e4SLinus Torvalds tmp_csum = csum_add(tmp_csum, skb->csum); 563357b40a1SHerbert Xu 564357b40a1SHerbert Xu if (csum_skb) 565357b40a1SHerbert Xu continue; 566357b40a1SHerbert Xu 567ea2ae17dSArnaldo Carvalho de Melo len = skb->len - skb_transport_offset(skb); 568357b40a1SHerbert Xu if (offset >= len) { 569357b40a1SHerbert Xu offset -= len; 570357b40a1SHerbert Xu continue; 5711da177e4SLinus Torvalds } 572357b40a1SHerbert Xu 573357b40a1SHerbert Xu csum_skb = skb; 5741da177e4SLinus Torvalds } 5751da177e4SLinus Torvalds 576357b40a1SHerbert Xu skb = csum_skb; 577357b40a1SHerbert Xu } 578357b40a1SHerbert Xu 579ea2ae17dSArnaldo Carvalho de Melo offset += skb_transport_offset(skb); 580357b40a1SHerbert Xu if (skb_copy_bits(skb, offset, &csum, 2)) 581357b40a1SHerbert Xu BUG(); 582357b40a1SHerbert Xu 5831da177e4SLinus Torvalds /* in case cksum was not initialized */ 584357b40a1SHerbert Xu if (unlikely(csum)) 5855f92a738SAl Viro tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); 5861da177e4SLinus Torvalds 587868c86bcSAl Viro csum = csum_ipv6_magic(&fl->fl6_src, 5881da177e4SLinus Torvalds &fl->fl6_dst, 589679a8738SHerbert Xu total_len, fl->proto, tmp_csum); 5901da177e4SLinus Torvalds 591f6ab0288SAl Viro if (csum == 0 && fl->proto == IPPROTO_UDP) 592f6ab0288SAl Viro csum = CSUM_MANGLED_0; 593357b40a1SHerbert Xu 594357b40a1SHerbert Xu if (skb_store_bits(skb, offset, &csum, 2)) 595357b40a1SHerbert Xu BUG(); 596357b40a1SHerbert Xu 5971da177e4SLinus Torvalds send: 5981da177e4SLinus Torvalds err = ip6_push_pending_frames(sk); 5991da177e4SLinus Torvalds out: 6001da177e4SLinus Torvalds return err; 6011da177e4SLinus Torvalds } 6021da177e4SLinus Torvalds 6031da177e4SLinus Torvalds static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, 6041da177e4SLinus Torvalds struct flowi *fl, struct rt6_info *rt, 6051da177e4SLinus Torvalds unsigned int flags) 6061da177e4SLinus Torvalds { 6073320da89SHerbert Xu struct ipv6_pinfo *np = inet6_sk(sk); 6081da177e4SLinus Torvalds struct ipv6hdr *iph; 6091da177e4SLinus Torvalds struct sk_buff *skb; 6101da177e4SLinus Torvalds int err; 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds if (length > rt->u.dst.dev->mtu) { 6131da177e4SLinus Torvalds ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); 6141da177e4SLinus Torvalds return -EMSGSIZE; 6151da177e4SLinus Torvalds } 6161da177e4SLinus Torvalds if (flags&MSG_PROBE) 6171da177e4SLinus Torvalds goto out; 6181da177e4SLinus Torvalds 619f5184d26SJohannes Berg skb = sock_alloc_send_skb(sk, 620f5184d26SJohannes Berg length + LL_ALLOCATED_SPACE(rt->u.dst.dev) + 15, 6211da177e4SLinus Torvalds flags & MSG_DONTWAIT, &err); 6221da177e4SLinus Torvalds if (skb == NULL) 6231da177e4SLinus Torvalds goto error; 624f5184d26SJohannes Berg skb_reserve(skb, LL_RESERVED_SPACE(rt->u.dst.dev)); 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds skb->priority = sk->sk_priority; 6274a19ec58SLaszlo Attila Toth skb->mark = sk->sk_mark; 628adf30907SEric Dumazet skb_dst_set(skb, dst_clone(&rt->u.dst)); 6291da177e4SLinus Torvalds 6301ced98e8SArnaldo Carvalho de Melo skb_put(skb, length); 6311ced98e8SArnaldo Carvalho de Melo skb_reset_network_header(skb); 6320660e03fSArnaldo Carvalho de Melo iph = ipv6_hdr(skb); 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds skb->ip_summed = CHECKSUM_NONE; 6351da177e4SLinus Torvalds 636b0e380b1SArnaldo Carvalho de Melo skb->transport_header = skb->network_header; 6371da177e4SLinus Torvalds err = memcpy_fromiovecend((void *)iph, from, 0, length); 6381da177e4SLinus Torvalds if (err) 6391da177e4SLinus Torvalds goto error_fault; 6401da177e4SLinus Torvalds 641edf391ffSNeil Horman IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len); 6426e23ae2aSPatrick McHardy err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev, 6431da177e4SLinus Torvalds dst_output); 6441da177e4SLinus Torvalds if (err > 0) 6453320da89SHerbert Xu err = np->recverr ? net_xmit_errno(err) : 0; 6461da177e4SLinus Torvalds if (err) 6471da177e4SLinus Torvalds goto error; 6481da177e4SLinus Torvalds out: 6491da177e4SLinus Torvalds return 0; 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds error_fault: 6521da177e4SLinus Torvalds err = -EFAULT; 6531da177e4SLinus Torvalds kfree_skb(skb); 6541da177e4SLinus Torvalds error: 6553bd653c8SDenis V. Lunev IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); 6561da177e4SLinus Torvalds return err; 6571da177e4SLinus Torvalds } 6581da177e4SLinus Torvalds 659a27b58feSHeiko Carstens static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) 6601da177e4SLinus Torvalds { 6611da177e4SLinus Torvalds struct iovec *iov; 6621da177e4SLinus Torvalds u8 __user *type = NULL; 6631da177e4SLinus Torvalds u8 __user *code = NULL; 6646e8f4d48SMasahide NAKAMURA u8 len = 0; 6651da177e4SLinus Torvalds int probed = 0; 6661da177e4SLinus Torvalds int i; 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds if (!msg->msg_iov) 669a27b58feSHeiko Carstens return 0; 6701da177e4SLinus Torvalds 6711da177e4SLinus Torvalds for (i = 0; i < msg->msg_iovlen; i++) { 6721da177e4SLinus Torvalds iov = &msg->msg_iov[i]; 6731da177e4SLinus Torvalds if (!iov) 6741da177e4SLinus Torvalds continue; 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds switch (fl->proto) { 6771da177e4SLinus Torvalds case IPPROTO_ICMPV6: 6781da177e4SLinus Torvalds /* check if one-byte field is readable or not. */ 6791da177e4SLinus Torvalds if (iov->iov_base && iov->iov_len < 1) 6801da177e4SLinus Torvalds break; 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds if (!type) { 6831da177e4SLinus Torvalds type = iov->iov_base; 6841da177e4SLinus Torvalds /* check if code field is readable or not. */ 6851da177e4SLinus Torvalds if (iov->iov_len > 1) 6861da177e4SLinus Torvalds code = type + 1; 6871da177e4SLinus Torvalds } else if (!code) 6881da177e4SLinus Torvalds code = iov->iov_base; 6891da177e4SLinus Torvalds 6901da177e4SLinus Torvalds if (type && code) { 691a27b58feSHeiko Carstens if (get_user(fl->fl_icmp_type, type) || 692a27b58feSHeiko Carstens get_user(fl->fl_icmp_code, code)) 693a27b58feSHeiko Carstens return -EFAULT; 6941da177e4SLinus Torvalds probed = 1; 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds break; 6976e8f4d48SMasahide NAKAMURA case IPPROTO_MH: 6986e8f4d48SMasahide NAKAMURA if (iov->iov_base && iov->iov_len < 1) 6996e8f4d48SMasahide NAKAMURA break; 7006e8f4d48SMasahide NAKAMURA /* check if type field is readable or not. */ 7016e8f4d48SMasahide NAKAMURA if (iov->iov_len > 2 - len) { 7026e8f4d48SMasahide NAKAMURA u8 __user *p = iov->iov_base; 703a27b58feSHeiko Carstens if (get_user(fl->fl_mh_type, &p[2 - len])) 704a27b58feSHeiko Carstens return -EFAULT; 7056e8f4d48SMasahide NAKAMURA probed = 1; 7066e8f4d48SMasahide NAKAMURA } else 7076e8f4d48SMasahide NAKAMURA len += iov->iov_len; 7086e8f4d48SMasahide NAKAMURA 7096e8f4d48SMasahide NAKAMURA break; 7101da177e4SLinus Torvalds default: 7111da177e4SLinus Torvalds probed = 1; 7121da177e4SLinus Torvalds break; 7131da177e4SLinus Torvalds } 7141da177e4SLinus Torvalds if (probed) 7151da177e4SLinus Torvalds break; 7161da177e4SLinus Torvalds } 717a27b58feSHeiko Carstens return 0; 7181da177e4SLinus Torvalds } 7191da177e4SLinus Torvalds 7201da177e4SLinus Torvalds static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, 7211da177e4SLinus Torvalds struct msghdr *msg, size_t len) 7221da177e4SLinus Torvalds { 7231da177e4SLinus Torvalds struct ipv6_txoptions opt_space; 7241da177e4SLinus Torvalds struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; 7251da177e4SLinus Torvalds struct in6_addr *daddr, *final_p = NULL, final; 7261da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 7271da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 7281da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 7291da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL; 7301da177e4SLinus Torvalds struct ip6_flowlabel *flowlabel = NULL; 7311da177e4SLinus Torvalds struct dst_entry *dst = NULL; 7321da177e4SLinus Torvalds struct flowi fl; 7331da177e4SLinus Torvalds int addr_len = msg->msg_namelen; 7341da177e4SLinus Torvalds int hlimit = -1; 73541a1f8eaSYOSHIFUJI Hideaki int tclass = -1; 7361da177e4SLinus Torvalds u16 proto; 7371da177e4SLinus Torvalds int err; 7381da177e4SLinus Torvalds 7391da177e4SLinus Torvalds /* Rough check on arithmetic overflow, 740b59e139bSYOSHIFUJI Hideaki better check is made in ip6_append_data(). 7411da177e4SLinus Torvalds */ 742b59e139bSYOSHIFUJI Hideaki if (len > INT_MAX) 7431da177e4SLinus Torvalds return -EMSGSIZE; 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds /* Mirror BSD error message compatibility */ 7461da177e4SLinus Torvalds if (msg->msg_flags & MSG_OOB) 7471da177e4SLinus Torvalds return -EOPNOTSUPP; 7481da177e4SLinus Torvalds 7491da177e4SLinus Torvalds /* 7501da177e4SLinus Torvalds * Get and verify the address. 7511da177e4SLinus Torvalds */ 7521da177e4SLinus Torvalds memset(&fl, 0, sizeof(fl)); 7531da177e4SLinus Torvalds 7544a19ec58SLaszlo Attila Toth fl.mark = sk->sk_mark; 7554a19ec58SLaszlo Attila Toth 7561da177e4SLinus Torvalds if (sin6) { 7571da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133) 7581da177e4SLinus Torvalds return -EINVAL; 7591da177e4SLinus Torvalds 7601da177e4SLinus Torvalds if (sin6->sin6_family && sin6->sin6_family != AF_INET6) 7611da177e4SLinus Torvalds return(-EAFNOSUPPORT); 7621da177e4SLinus Torvalds 7631da177e4SLinus Torvalds /* port is the proto value [0..255] carried in nexthdr */ 7641da177e4SLinus Torvalds proto = ntohs(sin6->sin6_port); 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvalds if (!proto) 7671da177e4SLinus Torvalds proto = inet->num; 7681da177e4SLinus Torvalds else if (proto != inet->num) 7691da177e4SLinus Torvalds return(-EINVAL); 7701da177e4SLinus Torvalds 7711da177e4SLinus Torvalds if (proto > 255) 7721da177e4SLinus Torvalds return(-EINVAL); 7731da177e4SLinus Torvalds 7741da177e4SLinus Torvalds daddr = &sin6->sin6_addr; 7751da177e4SLinus Torvalds if (np->sndflow) { 7761da177e4SLinus Torvalds fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 7771da177e4SLinus Torvalds if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { 7781da177e4SLinus Torvalds flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); 7791da177e4SLinus Torvalds if (flowlabel == NULL) 7801da177e4SLinus Torvalds return -EINVAL; 7811da177e4SLinus Torvalds daddr = &flowlabel->dst; 7821da177e4SLinus Torvalds } 7831da177e4SLinus Torvalds } 7841da177e4SLinus Torvalds 7851da177e4SLinus Torvalds /* 7861da177e4SLinus Torvalds * Otherwise it will be difficult to maintain 7871da177e4SLinus Torvalds * sk->sk_dst_cache. 7881da177e4SLinus Torvalds */ 7891da177e4SLinus Torvalds if (sk->sk_state == TCP_ESTABLISHED && 7901da177e4SLinus Torvalds ipv6_addr_equal(daddr, &np->daddr)) 7911da177e4SLinus Torvalds daddr = &np->daddr; 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) && 7941da177e4SLinus Torvalds sin6->sin6_scope_id && 7951da177e4SLinus Torvalds ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) 7961da177e4SLinus Torvalds fl.oif = sin6->sin6_scope_id; 7971da177e4SLinus Torvalds } else { 7981da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 7991da177e4SLinus Torvalds return -EDESTADDRREQ; 8001da177e4SLinus Torvalds 8011da177e4SLinus Torvalds proto = inet->num; 8021da177e4SLinus Torvalds daddr = &np->daddr; 8031da177e4SLinus Torvalds fl.fl6_flowlabel = np->flow_label; 8041da177e4SLinus Torvalds } 8051da177e4SLinus Torvalds 8061da177e4SLinus Torvalds if (fl.oif == 0) 8071da177e4SLinus Torvalds fl.oif = sk->sk_bound_dev_if; 8081da177e4SLinus Torvalds 8091da177e4SLinus Torvalds if (msg->msg_controllen) { 8101da177e4SLinus Torvalds opt = &opt_space; 8111da177e4SLinus Torvalds memset(opt, 0, sizeof(struct ipv6_txoptions)); 8121da177e4SLinus Torvalds opt->tot_len = sizeof(struct ipv6_txoptions); 8131da177e4SLinus Torvalds 81491e1908fSYOSHIFUJI Hideaki err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass); 8151da177e4SLinus Torvalds if (err < 0) { 8161da177e4SLinus Torvalds fl6_sock_release(flowlabel); 8171da177e4SLinus Torvalds return err; 8181da177e4SLinus Torvalds } 8191da177e4SLinus Torvalds if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 8201da177e4SLinus Torvalds flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); 8211da177e4SLinus Torvalds if (flowlabel == NULL) 8221da177e4SLinus Torvalds return -EINVAL; 8231da177e4SLinus Torvalds } 8241da177e4SLinus Torvalds if (!(opt->opt_nflen|opt->opt_flen)) 8251da177e4SLinus Torvalds opt = NULL; 8261da177e4SLinus Torvalds } 8271da177e4SLinus Torvalds if (opt == NULL) 8281da177e4SLinus Torvalds opt = np->opt; 829df9890c3SYOSHIFUJI Hideaki if (flowlabel) 8301da177e4SLinus Torvalds opt = fl6_merge_options(&opt_space, flowlabel, opt); 831df9890c3SYOSHIFUJI Hideaki opt = ipv6_fixup_options(&opt_space, opt); 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds fl.proto = proto; 834a27b58feSHeiko Carstens err = rawv6_probe_proto_opt(&fl, msg); 835a27b58feSHeiko Carstens if (err) 836a27b58feSHeiko Carstens goto out; 8371da177e4SLinus Torvalds 838876c7f41SBrian Haley if (!ipv6_addr_any(daddr)) 8391da177e4SLinus Torvalds ipv6_addr_copy(&fl.fl6_dst, daddr); 840876c7f41SBrian Haley else 841876c7f41SBrian Haley fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ 8421da177e4SLinus Torvalds if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) 8431da177e4SLinus Torvalds ipv6_addr_copy(&fl.fl6_src, &np->saddr); 8441da177e4SLinus Torvalds 8451da177e4SLinus Torvalds /* merge ip6_build_xmit from ip6_output */ 8461da177e4SLinus Torvalds if (opt && opt->srcrt) { 8471da177e4SLinus Torvalds struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; 8481da177e4SLinus Torvalds ipv6_addr_copy(&final, &fl.fl6_dst); 8491da177e4SLinus Torvalds ipv6_addr_copy(&fl.fl6_dst, rt0->addr); 8501da177e4SLinus Torvalds final_p = &final; 8511da177e4SLinus Torvalds } 8521da177e4SLinus Torvalds 8531da177e4SLinus Torvalds if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) 8541da177e4SLinus Torvalds fl.oif = np->mcast_oif; 855beb8d13bSVenkat Yekkirala security_sk_classify_flow(sk, &fl); 8561da177e4SLinus Torvalds 8571da177e4SLinus Torvalds err = ip6_dst_lookup(sk, &dst, &fl); 8581da177e4SLinus Torvalds if (err) 8591da177e4SLinus Torvalds goto out; 8601da177e4SLinus Torvalds if (final_p) 8611da177e4SLinus Torvalds ipv6_addr_copy(&fl.fl6_dst, final_p); 8621da177e4SLinus Torvalds 86352479b62SAlexey Dobriyan err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); 86452479b62SAlexey Dobriyan if (err < 0) { 86514e50e57SDavid S. Miller if (err == -EREMOTE) 86614e50e57SDavid S. Miller err = ip6_dst_blackhole(sk, &dst, &fl); 86714e50e57SDavid S. Miller if (err < 0) 8681da177e4SLinus Torvalds goto out; 86914e50e57SDavid S. Miller } 8701da177e4SLinus Torvalds 8711da177e4SLinus Torvalds if (hlimit < 0) { 8721da177e4SLinus Torvalds if (ipv6_addr_is_multicast(&fl.fl6_dst)) 8731da177e4SLinus Torvalds hlimit = np->mcast_hops; 8741da177e4SLinus Torvalds else 8751da177e4SLinus Torvalds hlimit = np->hop_limit; 8761da177e4SLinus Torvalds if (hlimit < 0) 8776b75d090SYOSHIFUJI Hideaki hlimit = ip6_dst_hoplimit(dst); 8781da177e4SLinus Torvalds } 8791da177e4SLinus Torvalds 88041a1f8eaSYOSHIFUJI Hideaki if (tclass < 0) { 881e012d51cSYOSHIFUJI Hideaki tclass = np->tclass; 88241a1f8eaSYOSHIFUJI Hideaki if (tclass < 0) 88341a1f8eaSYOSHIFUJI Hideaki tclass = 0; 88441a1f8eaSYOSHIFUJI Hideaki } 88541a1f8eaSYOSHIFUJI Hideaki 8861da177e4SLinus Torvalds if (msg->msg_flags&MSG_CONFIRM) 8871da177e4SLinus Torvalds goto do_confirm; 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds back_from_confirm: 8901da177e4SLinus Torvalds if (inet->hdrincl) { 8911da177e4SLinus Torvalds err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); 8921da177e4SLinus Torvalds } else { 8931da177e4SLinus Torvalds lock_sock(sk); 89441a1f8eaSYOSHIFUJI Hideaki err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, 89541a1f8eaSYOSHIFUJI Hideaki len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, 89641a1f8eaSYOSHIFUJI Hideaki msg->msg_flags); 8971da177e4SLinus Torvalds 8981da177e4SLinus Torvalds if (err) 8991da177e4SLinus Torvalds ip6_flush_pending_frames(sk); 9001da177e4SLinus Torvalds else if (!(msg->msg_flags & MSG_MORE)) 901357b40a1SHerbert Xu err = rawv6_push_pending_frames(sk, &fl, rp); 9023ef9d943SYOSHIFUJI Hideaki release_sock(sk); 9031da177e4SLinus Torvalds } 9041da177e4SLinus Torvalds done: 9056d3e85ecSNicolas DICHTEL dst_release(dst); 9061da177e4SLinus Torvalds out: 9071da177e4SLinus Torvalds fl6_sock_release(flowlabel); 9081da177e4SLinus Torvalds return err<0?err:len; 9091da177e4SLinus Torvalds do_confirm: 9101da177e4SLinus Torvalds dst_confirm(dst); 9111da177e4SLinus Torvalds if (!(msg->msg_flags & MSG_PROBE) || len) 9121da177e4SLinus Torvalds goto back_from_confirm; 9131da177e4SLinus Torvalds err = 0; 9141da177e4SLinus Torvalds goto done; 9151da177e4SLinus Torvalds } 9161da177e4SLinus Torvalds 9171da177e4SLinus Torvalds static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, 9181da177e4SLinus Torvalds char __user *optval, int optlen) 9191da177e4SLinus Torvalds { 9201da177e4SLinus Torvalds switch (optname) { 9211da177e4SLinus Torvalds case ICMPV6_FILTER: 9221da177e4SLinus Torvalds if (optlen > sizeof(struct icmp6_filter)) 9231da177e4SLinus Torvalds optlen = sizeof(struct icmp6_filter); 9241da177e4SLinus Torvalds if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) 9251da177e4SLinus Torvalds return -EFAULT; 9261da177e4SLinus Torvalds return 0; 9271da177e4SLinus Torvalds default: 9281da177e4SLinus Torvalds return -ENOPROTOOPT; 9293ff50b79SStephen Hemminger } 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds return 0; 9321da177e4SLinus Torvalds } 9331da177e4SLinus Torvalds 9341da177e4SLinus Torvalds static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, 9351da177e4SLinus Torvalds char __user *optval, int __user *optlen) 9361da177e4SLinus Torvalds { 9371da177e4SLinus Torvalds int len; 9381da177e4SLinus Torvalds 9391da177e4SLinus Torvalds switch (optname) { 9401da177e4SLinus Torvalds case ICMPV6_FILTER: 9411da177e4SLinus Torvalds if (get_user(len, optlen)) 9421da177e4SLinus Torvalds return -EFAULT; 9431da177e4SLinus Torvalds if (len < 0) 9441da177e4SLinus Torvalds return -EINVAL; 9451da177e4SLinus Torvalds if (len > sizeof(struct icmp6_filter)) 9461da177e4SLinus Torvalds len = sizeof(struct icmp6_filter); 9471da177e4SLinus Torvalds if (put_user(len, optlen)) 9481da177e4SLinus Torvalds return -EFAULT; 9491da177e4SLinus Torvalds if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) 9501da177e4SLinus Torvalds return -EFAULT; 9511da177e4SLinus Torvalds return 0; 9521da177e4SLinus Torvalds default: 9531da177e4SLinus Torvalds return -ENOPROTOOPT; 9543ff50b79SStephen Hemminger } 9551da177e4SLinus Torvalds 9561da177e4SLinus Torvalds return 0; 9571da177e4SLinus Torvalds } 9581da177e4SLinus Torvalds 9591da177e4SLinus Torvalds 9603fdadf7dSDmitry Mishin static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, 9611da177e4SLinus Torvalds char __user *optval, int optlen) 9621da177e4SLinus Torvalds { 9631da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 9641da177e4SLinus Torvalds int val; 9651da177e4SLinus Torvalds 9661da177e4SLinus Torvalds if (get_user(val, (int __user *)optval)) 9671da177e4SLinus Torvalds return -EFAULT; 9681da177e4SLinus Torvalds 9691da177e4SLinus Torvalds switch (optname) { 9701da177e4SLinus Torvalds case IPV6_CHECKSUM: 9711a98d05fSYOSHIFUJI Hideaki if (inet_sk(sk)->num == IPPROTO_ICMPV6 && 9721a98d05fSYOSHIFUJI Hideaki level == IPPROTO_IPV6) { 9731a98d05fSYOSHIFUJI Hideaki /* 9741a98d05fSYOSHIFUJI Hideaki * RFC3542 tells that IPV6_CHECKSUM socket 9751a98d05fSYOSHIFUJI Hideaki * option in the IPPROTO_IPV6 level is not 9761a98d05fSYOSHIFUJI Hideaki * allowed on ICMPv6 sockets. 9771a98d05fSYOSHIFUJI Hideaki * If you want to set it, use IPPROTO_RAW 9781a98d05fSYOSHIFUJI Hideaki * level IPV6_CHECKSUM socket option 9791a98d05fSYOSHIFUJI Hideaki * (Linux extension). 9801a98d05fSYOSHIFUJI Hideaki */ 9811a98d05fSYOSHIFUJI Hideaki return -EINVAL; 9821a98d05fSYOSHIFUJI Hideaki } 9831a98d05fSYOSHIFUJI Hideaki 9841da177e4SLinus Torvalds /* You may get strange result with a positive odd offset; 9851da177e4SLinus Torvalds RFC2292bis agrees with me. */ 9861da177e4SLinus Torvalds if (val > 0 && (val&1)) 9871da177e4SLinus Torvalds return(-EINVAL); 9881da177e4SLinus Torvalds if (val < 0) { 9891da177e4SLinus Torvalds rp->checksum = 0; 9901da177e4SLinus Torvalds } else { 9911da177e4SLinus Torvalds rp->checksum = 1; 9921da177e4SLinus Torvalds rp->offset = val; 9931da177e4SLinus Torvalds } 9941da177e4SLinus Torvalds 9951da177e4SLinus Torvalds return 0; 9961da177e4SLinus Torvalds break; 9971da177e4SLinus Torvalds 9981da177e4SLinus Torvalds default: 9991da177e4SLinus Torvalds return(-ENOPROTOOPT); 10001da177e4SLinus Torvalds } 10011da177e4SLinus Torvalds } 10021da177e4SLinus Torvalds 10033fdadf7dSDmitry Mishin static int rawv6_setsockopt(struct sock *sk, int level, int optname, 10043fdadf7dSDmitry Mishin char __user *optval, int optlen) 10051da177e4SLinus Torvalds { 10061da177e4SLinus Torvalds switch(level) { 10071da177e4SLinus Torvalds case SOL_RAW: 10081da177e4SLinus Torvalds break; 10091da177e4SLinus Torvalds 10101da177e4SLinus Torvalds case SOL_ICMPV6: 10111da177e4SLinus Torvalds if (inet_sk(sk)->num != IPPROTO_ICMPV6) 10121da177e4SLinus Torvalds return -EOPNOTSUPP; 10133fdadf7dSDmitry Mishin return rawv6_seticmpfilter(sk, level, optname, optval, 10141da177e4SLinus Torvalds optlen); 10151da177e4SLinus Torvalds case SOL_IPV6: 10161da177e4SLinus Torvalds if (optname == IPV6_CHECKSUM) 10171da177e4SLinus Torvalds break; 10181da177e4SLinus Torvalds default: 10193fdadf7dSDmitry Mishin return ipv6_setsockopt(sk, level, optname, optval, 10201da177e4SLinus Torvalds optlen); 10213ff50b79SStephen Hemminger } 10223ff50b79SStephen Hemminger 10233fdadf7dSDmitry Mishin return do_rawv6_setsockopt(sk, level, optname, optval, optlen); 10243fdadf7dSDmitry Mishin } 10253fdadf7dSDmitry Mishin 10263fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 10273fdadf7dSDmitry Mishin static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, 10283fdadf7dSDmitry Mishin char __user *optval, int optlen) 10293fdadf7dSDmitry Mishin { 10303fdadf7dSDmitry Mishin switch (level) { 10313fdadf7dSDmitry Mishin case SOL_RAW: 10323fdadf7dSDmitry Mishin break; 10333fdadf7dSDmitry Mishin case SOL_ICMPV6: 10343fdadf7dSDmitry Mishin if (inet_sk(sk)->num != IPPROTO_ICMPV6) 10353fdadf7dSDmitry Mishin return -EOPNOTSUPP; 1036543d9cfeSArnaldo Carvalho de Melo return rawv6_seticmpfilter(sk, level, optname, optval, optlen); 10373fdadf7dSDmitry Mishin case SOL_IPV6: 10383fdadf7dSDmitry Mishin if (optname == IPV6_CHECKSUM) 10393fdadf7dSDmitry Mishin break; 10403fdadf7dSDmitry Mishin default: 1041543d9cfeSArnaldo Carvalho de Melo return compat_ipv6_setsockopt(sk, level, optname, 1042543d9cfeSArnaldo Carvalho de Melo optval, optlen); 10433ff50b79SStephen Hemminger } 10443fdadf7dSDmitry Mishin return do_rawv6_setsockopt(sk, level, optname, optval, optlen); 10453fdadf7dSDmitry Mishin } 10463fdadf7dSDmitry Mishin #endif 10473fdadf7dSDmitry Mishin 10483fdadf7dSDmitry Mishin static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, 10493fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 10503fdadf7dSDmitry Mishin { 10513fdadf7dSDmitry Mishin struct raw6_sock *rp = raw6_sk(sk); 10523fdadf7dSDmitry Mishin int val, len; 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds if (get_user(len,optlen)) 10551da177e4SLinus Torvalds return -EFAULT; 10561da177e4SLinus Torvalds 10571da177e4SLinus Torvalds switch (optname) { 10581da177e4SLinus Torvalds case IPV6_CHECKSUM: 10591a98d05fSYOSHIFUJI Hideaki /* 10601a98d05fSYOSHIFUJI Hideaki * We allow getsockopt() for IPPROTO_IPV6-level 10611a98d05fSYOSHIFUJI Hideaki * IPV6_CHECKSUM socket option on ICMPv6 sockets 10621a98d05fSYOSHIFUJI Hideaki * since RFC3542 is silent about it. 10631a98d05fSYOSHIFUJI Hideaki */ 10641da177e4SLinus Torvalds if (rp->checksum == 0) 10651da177e4SLinus Torvalds val = -1; 10661da177e4SLinus Torvalds else 10671da177e4SLinus Torvalds val = rp->offset; 10681da177e4SLinus Torvalds break; 10691da177e4SLinus Torvalds 10701da177e4SLinus Torvalds default: 10711da177e4SLinus Torvalds return -ENOPROTOOPT; 10721da177e4SLinus Torvalds } 10731da177e4SLinus Torvalds 10741da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len); 10751da177e4SLinus Torvalds 10761da177e4SLinus Torvalds if (put_user(len, optlen)) 10771da177e4SLinus Torvalds return -EFAULT; 10781da177e4SLinus Torvalds if (copy_to_user(optval,&val,len)) 10791da177e4SLinus Torvalds return -EFAULT; 10801da177e4SLinus Torvalds return 0; 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds 10833fdadf7dSDmitry Mishin static int rawv6_getsockopt(struct sock *sk, int level, int optname, 10843fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 10853fdadf7dSDmitry Mishin { 10863fdadf7dSDmitry Mishin switch(level) { 10873fdadf7dSDmitry Mishin case SOL_RAW: 10883fdadf7dSDmitry Mishin break; 10893fdadf7dSDmitry Mishin 10903fdadf7dSDmitry Mishin case SOL_ICMPV6: 10913fdadf7dSDmitry Mishin if (inet_sk(sk)->num != IPPROTO_ICMPV6) 10923fdadf7dSDmitry Mishin return -EOPNOTSUPP; 10933fdadf7dSDmitry Mishin return rawv6_geticmpfilter(sk, level, optname, optval, 10943fdadf7dSDmitry Mishin optlen); 10953fdadf7dSDmitry Mishin case SOL_IPV6: 10963fdadf7dSDmitry Mishin if (optname == IPV6_CHECKSUM) 10973fdadf7dSDmitry Mishin break; 10983fdadf7dSDmitry Mishin default: 10993fdadf7dSDmitry Mishin return ipv6_getsockopt(sk, level, optname, optval, 11003fdadf7dSDmitry Mishin optlen); 11013ff50b79SStephen Hemminger } 11023ff50b79SStephen Hemminger 11033fdadf7dSDmitry Mishin return do_rawv6_getsockopt(sk, level, optname, optval, optlen); 11043fdadf7dSDmitry Mishin } 11053fdadf7dSDmitry Mishin 11063fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 11073fdadf7dSDmitry Mishin static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, 11083fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 11093fdadf7dSDmitry Mishin { 11103fdadf7dSDmitry Mishin switch (level) { 11113fdadf7dSDmitry Mishin case SOL_RAW: 11123fdadf7dSDmitry Mishin break; 11133fdadf7dSDmitry Mishin case SOL_ICMPV6: 11143fdadf7dSDmitry Mishin if (inet_sk(sk)->num != IPPROTO_ICMPV6) 11153fdadf7dSDmitry Mishin return -EOPNOTSUPP; 1116543d9cfeSArnaldo Carvalho de Melo return rawv6_geticmpfilter(sk, level, optname, optval, optlen); 11173fdadf7dSDmitry Mishin case SOL_IPV6: 11183fdadf7dSDmitry Mishin if (optname == IPV6_CHECKSUM) 11193fdadf7dSDmitry Mishin break; 11203fdadf7dSDmitry Mishin default: 1121543d9cfeSArnaldo Carvalho de Melo return compat_ipv6_getsockopt(sk, level, optname, 1122543d9cfeSArnaldo Carvalho de Melo optval, optlen); 11233ff50b79SStephen Hemminger } 11243fdadf7dSDmitry Mishin return do_rawv6_getsockopt(sk, level, optname, optval, optlen); 11253fdadf7dSDmitry Mishin } 11263fdadf7dSDmitry Mishin #endif 11273fdadf7dSDmitry Mishin 11281da177e4SLinus Torvalds static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) 11291da177e4SLinus Torvalds { 11301da177e4SLinus Torvalds switch(cmd) { 11311da177e4SLinus Torvalds case SIOCOUTQ: 11321da177e4SLinus Torvalds { 11331da177e4SLinus Torvalds int amount = atomic_read(&sk->sk_wmem_alloc); 11341da177e4SLinus Torvalds return put_user(amount, (int __user *)arg); 11351da177e4SLinus Torvalds } 11361da177e4SLinus Torvalds case SIOCINQ: 11371da177e4SLinus Torvalds { 11381da177e4SLinus Torvalds struct sk_buff *skb; 11391da177e4SLinus Torvalds int amount = 0; 11401da177e4SLinus Torvalds 1141e0f9f858SHerbert Xu spin_lock_bh(&sk->sk_receive_queue.lock); 11421da177e4SLinus Torvalds skb = skb_peek(&sk->sk_receive_queue); 11431da177e4SLinus Torvalds if (skb != NULL) 114427a884dcSArnaldo Carvalho de Melo amount = skb->tail - skb->transport_header; 1145e0f9f858SHerbert Xu spin_unlock_bh(&sk->sk_receive_queue.lock); 11461da177e4SLinus Torvalds return put_user(amount, (int __user *)arg); 11471da177e4SLinus Torvalds } 11481da177e4SLinus Torvalds 11491da177e4SLinus Torvalds default: 11507bc570c8SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_MROUTE 11517bc570c8SYOSHIFUJI Hideaki return ip6mr_ioctl(sk, cmd, (void __user *)arg); 11527bc570c8SYOSHIFUJI Hideaki #else 11531da177e4SLinus Torvalds return -ENOIOCTLCMD; 11547bc570c8SYOSHIFUJI Hideaki #endif 11551da177e4SLinus Torvalds } 11561da177e4SLinus Torvalds } 11571da177e4SLinus Torvalds 11581da177e4SLinus Torvalds static void rawv6_close(struct sock *sk, long timeout) 11591da177e4SLinus Torvalds { 11601da177e4SLinus Torvalds if (inet_sk(sk)->num == IPPROTO_RAW) 1161725a8ff0SDenis V. Lunev ip6_ra_control(sk, -1); 11627bc570c8SYOSHIFUJI Hideaki ip6mr_sk_done(sk); 11631da177e4SLinus Torvalds sk_common_release(sk); 11641da177e4SLinus Torvalds } 11651da177e4SLinus Torvalds 11667d06b2e0SBrian Haley static void raw6_destroy(struct sock *sk) 116722dd4850SDenis V. Lunev { 116822dd4850SDenis V. Lunev lock_sock(sk); 116922dd4850SDenis V. Lunev ip6_flush_pending_frames(sk); 117022dd4850SDenis V. Lunev release_sock(sk); 1171f23d60deSDavid S. Miller 11727d06b2e0SBrian Haley inet6_destroy_sock(sk); 117322dd4850SDenis V. Lunev } 117422dd4850SDenis V. Lunev 11751da177e4SLinus Torvalds static int rawv6_init_sk(struct sock *sk) 11761da177e4SLinus Torvalds { 11771da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 1178f48d5ff1SMasahide NAKAMURA 1179f48d5ff1SMasahide NAKAMURA switch (inet_sk(sk)->num) { 1180f48d5ff1SMasahide NAKAMURA case IPPROTO_ICMPV6: 11811da177e4SLinus Torvalds rp->checksum = 1; 11821da177e4SLinus Torvalds rp->offset = 2; 1183f48d5ff1SMasahide NAKAMURA break; 1184f48d5ff1SMasahide NAKAMURA case IPPROTO_MH: 1185f48d5ff1SMasahide NAKAMURA rp->checksum = 1; 1186f48d5ff1SMasahide NAKAMURA rp->offset = 4; 1187f48d5ff1SMasahide NAKAMURA break; 1188f48d5ff1SMasahide NAKAMURA default: 1189f48d5ff1SMasahide NAKAMURA break; 11901da177e4SLinus Torvalds } 11911da177e4SLinus Torvalds return(0); 11921da177e4SLinus Torvalds } 11931da177e4SLinus Torvalds 11941da177e4SLinus Torvalds struct proto rawv6_prot = { 11951da177e4SLinus Torvalds .name = "RAWv6", 11961da177e4SLinus Torvalds .owner = THIS_MODULE, 11971da177e4SLinus Torvalds .close = rawv6_close, 119822dd4850SDenis V. Lunev .destroy = raw6_destroy, 11991da177e4SLinus Torvalds .connect = ip6_datagram_connect, 12001da177e4SLinus Torvalds .disconnect = udp_disconnect, 12011da177e4SLinus Torvalds .ioctl = rawv6_ioctl, 12021da177e4SLinus Torvalds .init = rawv6_init_sk, 12031da177e4SLinus Torvalds .setsockopt = rawv6_setsockopt, 12041da177e4SLinus Torvalds .getsockopt = rawv6_getsockopt, 12051da177e4SLinus Torvalds .sendmsg = rawv6_sendmsg, 12061da177e4SLinus Torvalds .recvmsg = rawv6_recvmsg, 12071da177e4SLinus Torvalds .bind = rawv6_bind, 12081da177e4SLinus Torvalds .backlog_rcv = rawv6_rcv_skb, 1209fc8717baSPavel Emelyanov .hash = raw_hash_sk, 1210fc8717baSPavel Emelyanov .unhash = raw_unhash_sk, 12111da177e4SLinus Torvalds .obj_size = sizeof(struct raw6_sock), 1212fc8717baSPavel Emelyanov .h.raw_hash = &raw_v6_hashinfo, 1213543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 1214543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_rawv6_setsockopt, 1215543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_rawv6_getsockopt, 1216543d9cfeSArnaldo Carvalho de Melo #endif 12171da177e4SLinus Torvalds }; 12181da177e4SLinus Torvalds 12191da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 12201da177e4SLinus Torvalds static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) 12211da177e4SLinus Torvalds { 12221da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sp); 12231da177e4SLinus Torvalds struct in6_addr *dest, *src; 12241da177e4SLinus Torvalds __u16 destp, srcp; 12251da177e4SLinus Torvalds 12261da177e4SLinus Torvalds dest = &np->daddr; 12271da177e4SLinus Torvalds src = &np->rcv_saddr; 12281da177e4SLinus Torvalds destp = 0; 12291da177e4SLinus Torvalds srcp = inet_sk(sp)->num; 12301da177e4SLinus Torvalds seq_printf(seq, 12311da177e4SLinus Torvalds "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " 1232a92aa318SWang Chen "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", 12331da177e4SLinus Torvalds i, 12341da177e4SLinus Torvalds src->s6_addr32[0], src->s6_addr32[1], 12351da177e4SLinus Torvalds src->s6_addr32[2], src->s6_addr32[3], srcp, 12361da177e4SLinus Torvalds dest->s6_addr32[0], dest->s6_addr32[1], 12371da177e4SLinus Torvalds dest->s6_addr32[2], dest->s6_addr32[3], destp, 12381da177e4SLinus Torvalds sp->sk_state, 12391da177e4SLinus Torvalds atomic_read(&sp->sk_wmem_alloc), 12401da177e4SLinus Torvalds atomic_read(&sp->sk_rmem_alloc), 12411da177e4SLinus Torvalds 0, 0L, 0, 12421da177e4SLinus Torvalds sock_i_uid(sp), 0, 12431da177e4SLinus Torvalds sock_i_ino(sp), 1244a92aa318SWang Chen atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); 12451da177e4SLinus Torvalds } 12461da177e4SLinus Torvalds 12471da177e4SLinus Torvalds static int raw6_seq_show(struct seq_file *seq, void *v) 12481da177e4SLinus Torvalds { 12491da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 12501da177e4SLinus Torvalds seq_printf(seq, 12511da177e4SLinus Torvalds " sl " 12521da177e4SLinus Torvalds "local_address " 12531da177e4SLinus Torvalds "remote_address " 12541da177e4SLinus Torvalds "st tx_queue rx_queue tr tm->when retrnsmt" 1255cb61cb9bSEric Dumazet " uid timeout inode ref pointer drops\n"); 12561da177e4SLinus Torvalds else 125742a73808SPavel Emelyanov raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); 12581da177e4SLinus Torvalds return 0; 12591da177e4SLinus Torvalds } 12601da177e4SLinus Torvalds 126156b3d975SPhilippe De Muyter static const struct seq_operations raw6_seq_ops = { 126242a73808SPavel Emelyanov .start = raw_seq_start, 126342a73808SPavel Emelyanov .next = raw_seq_next, 126442a73808SPavel Emelyanov .stop = raw_seq_stop, 12651da177e4SLinus Torvalds .show = raw6_seq_show, 12661da177e4SLinus Torvalds }; 12671da177e4SLinus Torvalds 12681da177e4SLinus Torvalds static int raw6_seq_open(struct inode *inode, struct file *file) 12691da177e4SLinus Torvalds { 12703046d767SDenis V. Lunev return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops); 12711da177e4SLinus Torvalds } 12721da177e4SLinus Torvalds 12739a32144eSArjan van de Ven static const struct file_operations raw6_seq_fops = { 12741da177e4SLinus Torvalds .owner = THIS_MODULE, 12751da177e4SLinus Torvalds .open = raw6_seq_open, 12761da177e4SLinus Torvalds .read = seq_read, 12771da177e4SLinus Torvalds .llseek = seq_lseek, 1278f51d599fSPavel Emelyanov .release = seq_release_net, 12791da177e4SLinus Torvalds }; 12801da177e4SLinus Torvalds 1281a308da16SPavel Emelyanov static int raw6_init_net(struct net *net) 1282a308da16SPavel Emelyanov { 1283a308da16SPavel Emelyanov if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops)) 1284a308da16SPavel Emelyanov return -ENOMEM; 1285a308da16SPavel Emelyanov 1286a308da16SPavel Emelyanov return 0; 1287a308da16SPavel Emelyanov } 1288a308da16SPavel Emelyanov 1289a308da16SPavel Emelyanov static void raw6_exit_net(struct net *net) 1290a308da16SPavel Emelyanov { 1291a308da16SPavel Emelyanov proc_net_remove(net, "raw6"); 1292a308da16SPavel Emelyanov } 1293a308da16SPavel Emelyanov 1294a308da16SPavel Emelyanov static struct pernet_operations raw6_net_ops = { 1295a308da16SPavel Emelyanov .init = raw6_init_net, 1296a308da16SPavel Emelyanov .exit = raw6_exit_net, 1297a308da16SPavel Emelyanov }; 1298a308da16SPavel Emelyanov 12991da177e4SLinus Torvalds int __init raw6_proc_init(void) 13001da177e4SLinus Torvalds { 1301a308da16SPavel Emelyanov return register_pernet_subsys(&raw6_net_ops); 13021da177e4SLinus Torvalds } 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds void raw6_proc_exit(void) 13051da177e4SLinus Torvalds { 1306a308da16SPavel Emelyanov unregister_pernet_subsys(&raw6_net_ops); 13071da177e4SLinus Torvalds } 13081da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */ 13097f4e4868SDaniel Lezcano 13107f4e4868SDaniel Lezcano /* Same as inet6_dgram_ops, sans udp_poll. */ 13117f4e4868SDaniel Lezcano static const struct proto_ops inet6_sockraw_ops = { 13127f4e4868SDaniel Lezcano .family = PF_INET6, 13137f4e4868SDaniel Lezcano .owner = THIS_MODULE, 13147f4e4868SDaniel Lezcano .release = inet6_release, 13157f4e4868SDaniel Lezcano .bind = inet6_bind, 13167f4e4868SDaniel Lezcano .connect = inet_dgram_connect, /* ok */ 13177f4e4868SDaniel Lezcano .socketpair = sock_no_socketpair, /* a do nothing */ 13187f4e4868SDaniel Lezcano .accept = sock_no_accept, /* a do nothing */ 13197f4e4868SDaniel Lezcano .getname = inet6_getname, 13207f4e4868SDaniel Lezcano .poll = datagram_poll, /* ok */ 13217f4e4868SDaniel Lezcano .ioctl = inet6_ioctl, /* must change */ 13227f4e4868SDaniel Lezcano .listen = sock_no_listen, /* ok */ 13237f4e4868SDaniel Lezcano .shutdown = inet_shutdown, /* ok */ 13247f4e4868SDaniel Lezcano .setsockopt = sock_common_setsockopt, /* ok */ 13257f4e4868SDaniel Lezcano .getsockopt = sock_common_getsockopt, /* ok */ 13267f4e4868SDaniel Lezcano .sendmsg = inet_sendmsg, /* ok */ 13277f4e4868SDaniel Lezcano .recvmsg = sock_common_recvmsg, /* ok */ 13287f4e4868SDaniel Lezcano .mmap = sock_no_mmap, 13297f4e4868SDaniel Lezcano .sendpage = sock_no_sendpage, 13307f4e4868SDaniel Lezcano #ifdef CONFIG_COMPAT 13317f4e4868SDaniel Lezcano .compat_setsockopt = compat_sock_common_setsockopt, 13327f4e4868SDaniel Lezcano .compat_getsockopt = compat_sock_common_getsockopt, 13337f4e4868SDaniel Lezcano #endif 13347f4e4868SDaniel Lezcano }; 13357f4e4868SDaniel Lezcano 13367f4e4868SDaniel Lezcano static struct inet_protosw rawv6_protosw = { 13377f4e4868SDaniel Lezcano .type = SOCK_RAW, 13387f4e4868SDaniel Lezcano .protocol = IPPROTO_IP, /* wild card */ 13397f4e4868SDaniel Lezcano .prot = &rawv6_prot, 13407f4e4868SDaniel Lezcano .ops = &inet6_sockraw_ops, 13417f4e4868SDaniel Lezcano .capability = CAP_NET_RAW, 13427f4e4868SDaniel Lezcano .no_check = UDP_CSUM_DEFAULT, 13437f4e4868SDaniel Lezcano .flags = INET_PROTOSW_REUSE, 13447f4e4868SDaniel Lezcano }; 13457f4e4868SDaniel Lezcano 13467f4e4868SDaniel Lezcano int __init rawv6_init(void) 13477f4e4868SDaniel Lezcano { 13487f4e4868SDaniel Lezcano int ret; 13497f4e4868SDaniel Lezcano 13507f4e4868SDaniel Lezcano ret = inet6_register_protosw(&rawv6_protosw); 13517f4e4868SDaniel Lezcano if (ret) 13527f4e4868SDaniel Lezcano goto out; 13537f4e4868SDaniel Lezcano out: 13547f4e4868SDaniel Lezcano return ret; 13557f4e4868SDaniel Lezcano } 13567f4e4868SDaniel Lezcano 135709f7709fSDaniel Lezcano void rawv6_exit(void) 13587f4e4868SDaniel Lezcano { 13597f4e4868SDaniel Lezcano inet6_unregister_protosw(&rawv6_protosw); 13607f4e4868SDaniel Lezcano } 1361