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> 245a0e3ad6STejun Heo #include <linux/slab.h> 251da177e4SLinus Torvalds #include <linux/sockios.h> 261da177e4SLinus Torvalds #include <linux/net.h> 271da177e4SLinus Torvalds #include <linux/in6.h> 281da177e4SLinus Torvalds #include <linux/netdevice.h> 291da177e4SLinus Torvalds #include <linux/if_arp.h> 301da177e4SLinus Torvalds #include <linux/icmpv6.h> 311da177e4SLinus Torvalds #include <linux/netfilter.h> 321da177e4SLinus Torvalds #include <linux/netfilter_ipv6.h> 333305b80cSHerbert Xu #include <linux/skbuff.h> 34e2d57766SDavid S. Miller #include <linux/compat.h> 3529778becSAlex W Slater #include <linux/uaccess.h> 361da177e4SLinus Torvalds #include <asm/ioctls.h> 371da177e4SLinus Torvalds 38457c4cbcSEric W. Biederman #include <net/net_namespace.h> 391da177e4SLinus Torvalds #include <net/ip.h> 401da177e4SLinus Torvalds #include <net/sock.h> 411da177e4SLinus Torvalds #include <net/snmp.h> 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds #include <net/ipv6.h> 441da177e4SLinus Torvalds #include <net/ndisc.h> 451da177e4SLinus Torvalds #include <net/protocol.h> 461da177e4SLinus Torvalds #include <net/ip6_route.h> 471da177e4SLinus Torvalds #include <net/ip6_checksum.h> 481da177e4SLinus Torvalds #include <net/addrconf.h> 491da177e4SLinus Torvalds #include <net/transp_v6.h> 501da177e4SLinus Torvalds #include <net/udp.h> 511da177e4SLinus Torvalds #include <net/inet_common.h> 52c752f073SArnaldo Carvalho de Melo #include <net/tcp_states.h> 5307a93626SAmerigo Wang #if IS_ENABLED(CONFIG_IPV6_MIP6) 547be96f76SMasahide NAKAMURA #include <net/mip6.h> 557be96f76SMasahide NAKAMURA #endif 567bc570c8SYOSHIFUJI Hideaki #include <linux/mroute6.h> 571da177e4SLinus Torvalds 58b673e4dfSPavel Emelyanov #include <net/raw.h> 591da177e4SLinus Torvalds #include <net/rawv6.h> 601da177e4SLinus Torvalds #include <net/xfrm.h> 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds #include <linux/proc_fs.h> 631da177e4SLinus Torvalds #include <linux/seq_file.h> 64bc3b2d7fSPaul Gortmaker #include <linux/export.h> 651da177e4SLinus Torvalds 66d1c53c8eSWerner Almesberger #define ICMPV6_HDRLEN 4 /* ICMPv6 header, RFC 4443 Section 2.1 */ 67d1c53c8eSWerner Almesberger 68432490f9SCyrill Gorcunov struct raw_hashinfo raw_v6_hashinfo = { 69938b93adSRobert P. J. Day .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock), 70b673e4dfSPavel Emelyanov }; 71432490f9SCyrill Gorcunov EXPORT_SYMBOL_GPL(raw_v6_hashinfo); 721da177e4SLinus Torvalds 73432490f9SCyrill Gorcunov struct sock *__raw_v6_lookup(struct net *net, struct sock *sk, 74b71d1d42SEric Dumazet unsigned short num, const struct in6_addr *loc_addr, 75b71d1d42SEric Dumazet const struct in6_addr *rmt_addr, int dif) 761da177e4SLinus Torvalds { 77a50feda5SEric Dumazet bool is_multicast = ipv6_addr_is_multicast(loc_addr); 781da177e4SLinus Torvalds 79b67bfe0dSSasha Levin sk_for_each_from(sk) 80c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num == num) { 811da177e4SLinus Torvalds 82878628fbSYOSHIFUJI Hideaki if (!net_eq(sock_net(sk), net)) 83be185884SPavel Emelyanov continue; 84be185884SPavel Emelyanov 85efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_daddr) && 86efe4208fSEric Dumazet !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) 871da177e4SLinus Torvalds continue; 881da177e4SLinus Torvalds 890bd1b59bSAndrew McDonald if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) 900bd1b59bSAndrew McDonald continue; 910bd1b59bSAndrew McDonald 92efe4208fSEric Dumazet if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { 93efe4208fSEric Dumazet if (ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr)) 941da177e4SLinus Torvalds goto found; 951da177e4SLinus Torvalds if (is_multicast && 961da177e4SLinus Torvalds inet6_mc_check(sk, loc_addr, rmt_addr)) 971da177e4SLinus Torvalds goto found; 981da177e4SLinus Torvalds continue; 991da177e4SLinus Torvalds } 1001da177e4SLinus Torvalds goto found; 1011da177e4SLinus Torvalds } 1021da177e4SLinus Torvalds sk = NULL; 1031da177e4SLinus Torvalds found: 1041da177e4SLinus Torvalds return sk; 1051da177e4SLinus Torvalds } 106432490f9SCyrill Gorcunov EXPORT_SYMBOL_GPL(__raw_v6_lookup); 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds /* 1091da177e4SLinus Torvalds * 0 - deliver 1101da177e4SLinus Torvalds * 1 - block 1111da177e4SLinus Torvalds */ 1121b05c4b5SEric Dumazet static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb) 1131da177e4SLinus Torvalds { 1149cc08af3SWerner Almesberger struct icmp6hdr _hdr; 1151b05c4b5SEric Dumazet const struct icmp6hdr *hdr; 1161da177e4SLinus Torvalds 117d1c53c8eSWerner Almesberger /* We require only the four bytes of the ICMPv6 header, not any 118d1c53c8eSWerner Almesberger * additional bytes of message body in "struct icmp6hdr". 119d1c53c8eSWerner Almesberger */ 1201b05c4b5SEric Dumazet hdr = skb_header_pointer(skb, skb_transport_offset(skb), 121d1c53c8eSWerner Almesberger ICMPV6_HDRLEN, &_hdr); 1221b05c4b5SEric Dumazet if (hdr) { 1231b05c4b5SEric Dumazet const __u32 *data = &raw6_sk(sk)->filter.data[0]; 1241b05c4b5SEric Dumazet unsigned int type = hdr->icmp6_type; 1251da177e4SLinus Torvalds 1261b05c4b5SEric Dumazet return (data[type >> 5] & (1U << (type & 31))) != 0; 1271da177e4SLinus Torvalds } 1281b05c4b5SEric Dumazet return 1; 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 13107a93626SAmerigo Wang #if IS_ENABLED(CONFIG_IPV6_MIP6) 132f2eda47dSEric Dumazet typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb); 13359fbb3a6SMasahide NAKAMURA 134f2eda47dSEric Dumazet static mh_filter_t __rcu *mh_filter __read_mostly; 135f2eda47dSEric Dumazet 136f2eda47dSEric Dumazet int rawv6_mh_filter_register(mh_filter_t filter) 13759fbb3a6SMasahide NAKAMURA { 138cf778b00SEric Dumazet rcu_assign_pointer(mh_filter, filter); 13959fbb3a6SMasahide NAKAMURA return 0; 14059fbb3a6SMasahide NAKAMURA } 14159fbb3a6SMasahide NAKAMURA EXPORT_SYMBOL(rawv6_mh_filter_register); 14259fbb3a6SMasahide NAKAMURA 143f2eda47dSEric Dumazet int rawv6_mh_filter_unregister(mh_filter_t filter) 14459fbb3a6SMasahide NAKAMURA { 145a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(mh_filter, NULL); 14659fbb3a6SMasahide NAKAMURA synchronize_rcu(); 14759fbb3a6SMasahide NAKAMURA return 0; 14859fbb3a6SMasahide NAKAMURA } 14959fbb3a6SMasahide NAKAMURA EXPORT_SYMBOL(rawv6_mh_filter_unregister); 15059fbb3a6SMasahide NAKAMURA 15159fbb3a6SMasahide NAKAMURA #endif 15259fbb3a6SMasahide NAKAMURA 1531da177e4SLinus Torvalds /* 1541da177e4SLinus Torvalds * demultiplex raw sockets. 1551da177e4SLinus Torvalds * (should consider queueing the skb in the sock receive_queue 1561da177e4SLinus Torvalds * without calling rawv6.c) 1571da177e4SLinus Torvalds * 1581da177e4SLinus Torvalds * Caller owns SKB so we must make clones. 1591da177e4SLinus Torvalds */ 160a50feda5SEric Dumazet static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) 1611da177e4SLinus Torvalds { 162b71d1d42SEric Dumazet const struct in6_addr *saddr; 163b71d1d42SEric Dumazet const struct in6_addr *daddr; 1641da177e4SLinus Torvalds struct sock *sk; 165a50feda5SEric Dumazet bool delivered = false; 1661da177e4SLinus Torvalds __u8 hash; 167be185884SPavel Emelyanov struct net *net; 1681da177e4SLinus Torvalds 1690660e03fSArnaldo Carvalho de Melo saddr = &ipv6_hdr(skb)->saddr; 1701da177e4SLinus Torvalds daddr = saddr + 1; 1711da177e4SLinus Torvalds 172f9242b6bSDavid S. Miller hash = nexthdr & (RAW_HTABLE_SIZE - 1); 1731da177e4SLinus Torvalds 174b673e4dfSPavel Emelyanov read_lock(&raw_v6_hashinfo.lock); 175b673e4dfSPavel Emelyanov sk = sk_head(&raw_v6_hashinfo.ht[hash]); 1761da177e4SLinus Torvalds 17763159f29SIan Morris if (!sk) 1781da177e4SLinus Torvalds goto out; 1791da177e4SLinus Torvalds 180c346dca1SYOSHIFUJI Hideaki net = dev_net(skb->dev); 1814330487aSDuan Jiong sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, inet6_iif(skb)); 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds while (sk) { 1847be96f76SMasahide NAKAMURA int filtered; 1857be96f76SMasahide NAKAMURA 186a50feda5SEric Dumazet delivered = true; 1877be96f76SMasahide NAKAMURA switch (nexthdr) { 1887be96f76SMasahide NAKAMURA case IPPROTO_ICMPV6: 1897be96f76SMasahide NAKAMURA filtered = icmpv6_filter(sk, skb); 1907be96f76SMasahide NAKAMURA break; 19159fbb3a6SMasahide NAKAMURA 19207a93626SAmerigo Wang #if IS_ENABLED(CONFIG_IPV6_MIP6) 1937be96f76SMasahide NAKAMURA case IPPROTO_MH: 19459fbb3a6SMasahide NAKAMURA { 1957be96f76SMasahide NAKAMURA /* XXX: To validate MH only once for each packet, 1967be96f76SMasahide NAKAMURA * this is placed here. It should be after checking 1977be96f76SMasahide NAKAMURA * xfrm policy, however it doesn't. The checking xfrm 1987be96f76SMasahide NAKAMURA * policy is placed in rawv6_rcv() because it is 1997be96f76SMasahide NAKAMURA * required for each socket. 2007be96f76SMasahide NAKAMURA */ 201f2eda47dSEric Dumazet mh_filter_t *filter; 20259fbb3a6SMasahide NAKAMURA 20359fbb3a6SMasahide NAKAMURA filter = rcu_dereference(mh_filter); 204f2eda47dSEric Dumazet filtered = filter ? (*filter)(sk, skb) : 0; 2057be96f76SMasahide NAKAMURA break; 20659fbb3a6SMasahide NAKAMURA } 2077be96f76SMasahide NAKAMURA #endif 2087be96f76SMasahide NAKAMURA default: 2097be96f76SMasahide NAKAMURA filtered = 0; 2107be96f76SMasahide NAKAMURA break; 2117be96f76SMasahide NAKAMURA } 2127be96f76SMasahide NAKAMURA 2137be96f76SMasahide NAKAMURA if (filtered < 0) 2147be96f76SMasahide NAKAMURA break; 2157be96f76SMasahide NAKAMURA if (filtered == 0) { 2161da177e4SLinus Torvalds struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds /* Not releasing hash table! */ 2199fb9cbb1SYasuyuki Kozakai if (clone) { 2209fb9cbb1SYasuyuki Kozakai nf_reset(clone); 2211da177e4SLinus Torvalds rawv6_rcv(sk, clone); 2221da177e4SLinus Torvalds } 2239fb9cbb1SYasuyuki Kozakai } 224be185884SPavel Emelyanov sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr, 2254330487aSDuan Jiong inet6_iif(skb)); 2261da177e4SLinus Torvalds } 2271da177e4SLinus Torvalds out: 228b673e4dfSPavel Emelyanov read_unlock(&raw_v6_hashinfo.lock); 229d13964f4SPatrick McHardy return delivered; 2301da177e4SLinus Torvalds } 2311da177e4SLinus Torvalds 232a50feda5SEric Dumazet bool raw6_local_deliver(struct sk_buff *skb, int nexthdr) 23369d6da0bSPavel Emelyanov { 23469d6da0bSPavel Emelyanov struct sock *raw_sk; 23569d6da0bSPavel Emelyanov 236f9242b6bSDavid S. Miller raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]); 23769d6da0bSPavel Emelyanov if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) 23869d6da0bSPavel Emelyanov raw_sk = NULL; 23969d6da0bSPavel Emelyanov 24069d6da0bSPavel Emelyanov return raw_sk != NULL; 24169d6da0bSPavel Emelyanov } 24269d6da0bSPavel Emelyanov 2431da177e4SLinus Torvalds /* This cleans up af_inet6 a bit. -DaveM */ 2441da177e4SLinus Torvalds static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) 2451da177e4SLinus Torvalds { 2461da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 2471da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 2481da177e4SLinus Torvalds struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; 249e69a4adcSAl Viro __be32 v4addr = 0; 2501da177e4SLinus Torvalds int addr_type; 2511da177e4SLinus Torvalds int err; 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133) 2541da177e4SLinus Torvalds return -EINVAL; 25582b276cdSHannes Frederic Sowa 25682b276cdSHannes Frederic Sowa if (addr->sin6_family != AF_INET6) 25782b276cdSHannes Frederic Sowa return -EINVAL; 25882b276cdSHannes Frederic Sowa 2591da177e4SLinus Torvalds addr_type = ipv6_addr_type(&addr->sin6_addr); 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds /* Raw sockets are IPv6 only */ 2621da177e4SLinus Torvalds if (addr_type == IPV6_ADDR_MAPPED) 263fd5c0027SEric Dumazet return -EADDRNOTAVAIL; 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds lock_sock(sk); 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds err = -EINVAL; 2681da177e4SLinus Torvalds if (sk->sk_state != TCP_CLOSE) 2691da177e4SLinus Torvalds goto out; 2701da177e4SLinus Torvalds 271fd5c0027SEric Dumazet rcu_read_lock(); 2721da177e4SLinus Torvalds /* Check if the address belongs to the host. */ 2731da177e4SLinus Torvalds if (addr_type != IPV6_ADDR_ANY) { 2741da177e4SLinus Torvalds struct net_device *dev = NULL; 2751da177e4SLinus Torvalds 276842df073SHannes Frederic Sowa if (__ipv6_addr_needs_scope_id(addr_type)) { 2771da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) && 2781da177e4SLinus Torvalds addr->sin6_scope_id) { 2791da177e4SLinus Torvalds /* Override any existing binding, if another 2801da177e4SLinus Torvalds * one is supplied by user. 2811da177e4SLinus Torvalds */ 2821da177e4SLinus Torvalds sk->sk_bound_dev_if = addr->sin6_scope_id; 2831da177e4SLinus Torvalds } 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds /* Binding to link-local address requires an interface */ 2861da177e4SLinus Torvalds if (!sk->sk_bound_dev_if) 287fd5c0027SEric Dumazet goto out_unlock; 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds err = -ENODEV; 290fd5c0027SEric Dumazet dev = dev_get_by_index_rcu(sock_net(sk), 291fd5c0027SEric Dumazet sk->sk_bound_dev_if); 292fd5c0027SEric Dumazet if (!dev) 293fd5c0027SEric Dumazet goto out_unlock; 2941da177e4SLinus Torvalds } 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds /* ipv4 addr of the socket is invalid. Only the 2971da177e4SLinus Torvalds * unspecified and mapped address have a v4 equivalent. 2981da177e4SLinus Torvalds */ 2991da177e4SLinus Torvalds v4addr = LOOPBACK4_IPV6; 30035a256feSTom Herbert if (!(addr_type & IPV6_ADDR_MULTICAST) && 30135a256feSTom Herbert !sock_net(sk)->ipv6.sysctl.ip_nonlocal_bind) { 3021da177e4SLinus Torvalds err = -EADDRNOTAVAIL; 3033b1e0a65SYOSHIFUJI Hideaki if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr, 304bfeade08SDaniel Lezcano dev, 0)) { 305fd5c0027SEric Dumazet goto out_unlock; 3061da177e4SLinus Torvalds } 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds } 3091da177e4SLinus Torvalds 310c720c7e8SEric Dumazet inet->inet_rcv_saddr = inet->inet_saddr = v4addr; 311efe4208fSEric Dumazet sk->sk_v6_rcv_saddr = addr->sin6_addr; 3121da177e4SLinus Torvalds if (!(addr_type & IPV6_ADDR_MULTICAST)) 3134e3fd7a0SAlexey Dobriyan np->saddr = addr->sin6_addr; 3141da177e4SLinus Torvalds err = 0; 315fd5c0027SEric Dumazet out_unlock: 316fd5c0027SEric Dumazet rcu_read_unlock(); 3171da177e4SLinus Torvalds out: 3181da177e4SLinus Torvalds release_sock(sk); 3191da177e4SLinus Torvalds return err; 3201da177e4SLinus Torvalds } 3211da177e4SLinus Torvalds 32269d6da0bSPavel Emelyanov static void rawv6_err(struct sock *sk, struct sk_buff *skb, 3231da177e4SLinus Torvalds struct inet6_skb_parm *opt, 324d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info) 3251da177e4SLinus Torvalds { 3261da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 3271da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 3281da177e4SLinus Torvalds int err; 3291da177e4SLinus Torvalds int harderr; 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvalds /* Report error on raw socket, if: 3321da177e4SLinus Torvalds 1. User requested recverr. 3331da177e4SLinus Torvalds 2. Socket is connected (otherwise the error indication 3341da177e4SLinus Torvalds is useless without recverr and error is hard. 3351da177e4SLinus Torvalds */ 3361da177e4SLinus Torvalds if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) 3371da177e4SLinus Torvalds return; 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds harderr = icmpv6_err_convert(type, code, &err); 34081aded24SDavid S. Miller if (type == ICMPV6_PKT_TOOBIG) { 34181aded24SDavid S. Miller ip6_sk_update_pmtu(skb, sk, info); 3421da177e4SLinus Torvalds harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); 34381aded24SDavid S. Miller } 3448d65b119SDuan Jiong if (type == NDISC_REDIRECT) { 345ec18d9a2SDavid S. Miller ip6_sk_redirect(skb, sk); 3468d65b119SDuan Jiong return; 3478d65b119SDuan Jiong } 3481da177e4SLinus Torvalds if (np->recverr) { 3491da177e4SLinus Torvalds u8 *payload = skb->data; 3501da177e4SLinus Torvalds if (!inet->hdrincl) 3511da177e4SLinus Torvalds payload += offset; 3521da177e4SLinus Torvalds ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds if (np->recverr || harderr) { 3561da177e4SLinus Torvalds sk->sk_err = err; 3571da177e4SLinus Torvalds sk->sk_error_report(sk); 3581da177e4SLinus Torvalds } 3591da177e4SLinus Torvalds } 3601da177e4SLinus Torvalds 36169d6da0bSPavel Emelyanov void raw6_icmp_error(struct sk_buff *skb, int nexthdr, 362d5fdd6baSBrian Haley u8 type, u8 code, int inner_offset, __be32 info) 36369d6da0bSPavel Emelyanov { 36469d6da0bSPavel Emelyanov struct sock *sk; 36569d6da0bSPavel Emelyanov int hash; 366b71d1d42SEric Dumazet const struct in6_addr *saddr, *daddr; 367be185884SPavel Emelyanov struct net *net; 36869d6da0bSPavel Emelyanov 369b673e4dfSPavel Emelyanov hash = nexthdr & (RAW_HTABLE_SIZE - 1); 37069d6da0bSPavel Emelyanov 371b673e4dfSPavel Emelyanov read_lock(&raw_v6_hashinfo.lock); 372b673e4dfSPavel Emelyanov sk = sk_head(&raw_v6_hashinfo.ht[hash]); 37353b24b8fSIan Morris if (sk) { 37405f175cdSYOSHIFUJI Hideaki /* Note: ipv6_hdr(skb) != skb->data */ 375b71d1d42SEric Dumazet const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data; 37605f175cdSYOSHIFUJI Hideaki saddr = &ip6h->saddr; 37705f175cdSYOSHIFUJI Hideaki daddr = &ip6h->daddr; 378c346dca1SYOSHIFUJI Hideaki net = dev_net(skb->dev); 37969d6da0bSPavel Emelyanov 380be185884SPavel Emelyanov while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr, 3814330487aSDuan Jiong inet6_iif(skb)))) { 38269d6da0bSPavel Emelyanov rawv6_err(sk, skb, NULL, type, code, 38369d6da0bSPavel Emelyanov inner_offset, info); 38469d6da0bSPavel Emelyanov sk = sk_next(sk); 38569d6da0bSPavel Emelyanov } 38669d6da0bSPavel Emelyanov } 387b673e4dfSPavel Emelyanov read_unlock(&raw_v6_hashinfo.lock); 38869d6da0bSPavel Emelyanov } 38969d6da0bSPavel Emelyanov 3901da177e4SLinus Torvalds static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb) 3911da177e4SLinus Torvalds { 39233d480ceSEric Dumazet if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) && 393fb286bb2SHerbert Xu skb_checksum_complete(skb)) { 394a92aa318SWang Chen atomic_inc(&sk->sk_drops); 3951da177e4SLinus Torvalds kfree_skb(skb); 3963cc76caaSYang Hongyang return NET_RX_DROP; 3971da177e4SLinus Torvalds } 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds /* Charge it to the socket. */ 400d826eb14SEric Dumazet skb_dst_drop(skb); 401d826eb14SEric Dumazet if (sock_queue_rcv_skb(sk, skb) < 0) { 4021da177e4SLinus Torvalds kfree_skb(skb); 4033cc76caaSYang Hongyang return NET_RX_DROP; 4041da177e4SLinus Torvalds } 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds return 0; 4071da177e4SLinus Torvalds } 4081da177e4SLinus Torvalds 4091da177e4SLinus Torvalds /* 4101da177e4SLinus Torvalds * This is next to useless... 4111da177e4SLinus Torvalds * if we demultiplex in network layer we don't need the extra call 4121da177e4SLinus Torvalds * just to queue the skb... 4131da177e4SLinus Torvalds * maybe we could have the network decide upon a hint if it 4141da177e4SLinus Torvalds * should call raw_rcv for demultiplexing 4151da177e4SLinus Torvalds */ 4161da177e4SLinus Torvalds int rawv6_rcv(struct sock *sk, struct sk_buff *skb) 4171da177e4SLinus Torvalds { 4181da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 4191da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 4201da177e4SLinus Torvalds 4211da177e4SLinus Torvalds if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { 422a92aa318SWang Chen atomic_inc(&sk->sk_drops); 4231da177e4SLinus Torvalds kfree_skb(skb); 4241da177e4SLinus Torvalds return NET_RX_DROP; 4251da177e4SLinus Torvalds } 4261da177e4SLinus Torvalds 4271da177e4SLinus Torvalds if (!rp->checksum) 4281da177e4SLinus Torvalds skb->ip_summed = CHECKSUM_UNNECESSARY; 4291da177e4SLinus Torvalds 43084fa7933SPatrick McHardy if (skb->ip_summed == CHECKSUM_COMPLETE) { 431d56f90a7SArnaldo Carvalho de Melo skb_postpull_rcsum(skb, skb_network_header(skb), 432cfe1fc77SArnaldo Carvalho de Melo skb_network_header_len(skb)); 4330660e03fSArnaldo Carvalho de Melo if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 4340660e03fSArnaldo Carvalho de Melo &ipv6_hdr(skb)->daddr, 435c720c7e8SEric Dumazet skb->len, inet->inet_num, skb->csum)) 436fb286bb2SHerbert Xu skb->ip_summed = CHECKSUM_UNNECESSARY; 4371da177e4SLinus Torvalds } 43860476372SHerbert Xu if (!skb_csum_unnecessary(skb)) 4390660e03fSArnaldo Carvalho de Melo skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 4400660e03fSArnaldo Carvalho de Melo &ipv6_hdr(skb)->daddr, 4410660e03fSArnaldo Carvalho de Melo skb->len, 442c720c7e8SEric Dumazet inet->inet_num, 0)); 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds if (inet->hdrincl) { 445fb286bb2SHerbert Xu if (skb_checksum_complete(skb)) { 446a92aa318SWang Chen atomic_inc(&sk->sk_drops); 4471da177e4SLinus Torvalds kfree_skb(skb); 4483cc76caaSYang Hongyang return NET_RX_DROP; 4491da177e4SLinus Torvalds } 4501da177e4SLinus Torvalds } 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds rawv6_rcv_skb(sk, skb); 4531da177e4SLinus Torvalds return 0; 4541da177e4SLinus Torvalds } 4551da177e4SLinus Torvalds 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds /* 4581da177e4SLinus Torvalds * This should be easy, if there is something there 4591da177e4SLinus Torvalds * we return it, otherwise we block. 4601da177e4SLinus Torvalds */ 4611da177e4SLinus Torvalds 4621b784140SYing Xue static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, 4631da177e4SLinus Torvalds int noblock, int flags, int *addr_len) 4641da177e4SLinus Torvalds { 4651da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 466342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); 4671da177e4SLinus Torvalds struct sk_buff *skb; 4681da177e4SLinus Torvalds size_t copied; 4691da177e4SLinus Torvalds int err; 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds if (flags & MSG_OOB) 4721da177e4SLinus Torvalds return -EOPNOTSUPP; 4731da177e4SLinus Torvalds 4741da177e4SLinus Torvalds if (flags & MSG_ERRQUEUE) 47585fbaa75SHannes Frederic Sowa return ipv6_recv_error(sk, msg, len, addr_len); 4761da177e4SLinus Torvalds 4774b340ae2SBrian Haley if (np->rxpmtu && np->rxopt.bits.rxpmtu) 47885fbaa75SHannes Frederic Sowa return ipv6_recv_rxpmtu(sk, msg, len, addr_len); 4794b340ae2SBrian Haley 4801da177e4SLinus Torvalds skb = skb_recv_datagram(sk, flags, noblock, &err); 4811da177e4SLinus Torvalds if (!skb) 4821da177e4SLinus Torvalds goto out; 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds copied = skb->len; 4851da177e4SLinus Torvalds if (copied > len) { 4861da177e4SLinus Torvalds copied = len; 4871da177e4SLinus Torvalds msg->msg_flags |= MSG_TRUNC; 4881da177e4SLinus Torvalds } 4891da177e4SLinus Torvalds 49060476372SHerbert Xu if (skb_csum_unnecessary(skb)) { 49151f3d02bSDavid S. Miller err = skb_copy_datagram_msg(skb, 0, msg, copied); 4921da177e4SLinus Torvalds } else if (msg->msg_flags&MSG_TRUNC) { 493fb286bb2SHerbert Xu if (__skb_checksum_complete(skb)) 4941da177e4SLinus Torvalds goto csum_copy_err; 49551f3d02bSDavid S. Miller err = skb_copy_datagram_msg(skb, 0, msg, copied); 4961da177e4SLinus Torvalds } else { 497227158dbSAl Viro err = skb_copy_and_csum_datagram_msg(skb, 0, msg); 4981da177e4SLinus Torvalds if (err == -EINVAL) 4991da177e4SLinus Torvalds goto csum_copy_err; 5001da177e4SLinus Torvalds } 5011da177e4SLinus Torvalds if (err) 5021da177e4SLinus Torvalds goto out_free; 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds /* Copy the address. */ 5051da177e4SLinus Torvalds if (sin6) { 5061da177e4SLinus Torvalds sin6->sin6_family = AF_INET6; 507f59fc7f3STetsuo Handa sin6->sin6_port = 0; 5084e3fd7a0SAlexey Dobriyan sin6->sin6_addr = ipv6_hdr(skb)->saddr; 5091da177e4SLinus Torvalds sin6->sin6_flowinfo = 0; 510842df073SHannes Frederic Sowa sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr, 5114330487aSDuan Jiong inet6_iif(skb)); 512bceaa902SHannes Frederic Sowa *addr_len = sizeof(*sin6); 5131da177e4SLinus Torvalds } 5141da177e4SLinus Torvalds 5153b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds if (np->rxopt.all) 51873df66f8STom Parkin ip6_datagram_recv_ctl(sk, msg, skb); 5191da177e4SLinus Torvalds 5201da177e4SLinus Torvalds err = copied; 5211da177e4SLinus Torvalds if (flags & MSG_TRUNC) 5221da177e4SLinus Torvalds err = skb->len; 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds out_free: 5251da177e4SLinus Torvalds skb_free_datagram(sk, skb); 5261da177e4SLinus Torvalds out: 5271da177e4SLinus Torvalds return err; 5281da177e4SLinus Torvalds 5291da177e4SLinus Torvalds csum_copy_err: 5303305b80cSHerbert Xu skb_kill_datagram(sk, skb, flags); 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds /* Error for blocking case is chosen to masquerade 5331da177e4SLinus Torvalds as some normal condition. 5341da177e4SLinus Torvalds */ 5351da177e4SLinus Torvalds err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; 5363305b80cSHerbert Xu goto out; 5371da177e4SLinus Torvalds } 5381da177e4SLinus Torvalds 5394c9483b2SDavid S. Miller static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, 540357b40a1SHerbert Xu struct raw6_sock *rp) 5411da177e4SLinus Torvalds { 5421da177e4SLinus Torvalds struct sk_buff *skb; 5431da177e4SLinus Torvalds int err = 0; 544357b40a1SHerbert Xu int offset; 545357b40a1SHerbert Xu int len; 546679a8738SHerbert Xu int total_len; 547868c86bcSAl Viro __wsum tmp_csum; 548868c86bcSAl Viro __sum16 csum; 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvalds if (!rp->checksum) 5511da177e4SLinus Torvalds goto send; 5521da177e4SLinus Torvalds 55343728fa5SFabian Frederick skb = skb_peek(&sk->sk_write_queue); 55443728fa5SFabian Frederick if (!skb) 5551da177e4SLinus Torvalds goto out; 5561da177e4SLinus Torvalds 557357b40a1SHerbert Xu offset = rp->offset; 558299b0767SSteffen Klassert total_len = inet_sk(sk)->cork.base.length; 559679a8738SHerbert Xu if (offset >= total_len - 1) { 5601da177e4SLinus Torvalds err = -EINVAL; 561357b40a1SHerbert Xu ip6_flush_pending_frames(sk); 5621da177e4SLinus Torvalds goto out; 5631da177e4SLinus Torvalds } 5641da177e4SLinus Torvalds 5651da177e4SLinus Torvalds /* should be check HW csum miyazawa */ 5661da177e4SLinus Torvalds if (skb_queue_len(&sk->sk_write_queue) == 1) { 5671da177e4SLinus Torvalds /* 5681da177e4SLinus Torvalds * Only one fragment on the socket. 5691da177e4SLinus Torvalds */ 5701da177e4SLinus Torvalds tmp_csum = skb->csum; 5711da177e4SLinus Torvalds } else { 572357b40a1SHerbert Xu struct sk_buff *csum_skb = NULL; 5731da177e4SLinus Torvalds tmp_csum = 0; 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds skb_queue_walk(&sk->sk_write_queue, skb) { 5761da177e4SLinus Torvalds tmp_csum = csum_add(tmp_csum, skb->csum); 577357b40a1SHerbert Xu 578357b40a1SHerbert Xu if (csum_skb) 579357b40a1SHerbert Xu continue; 580357b40a1SHerbert Xu 581ea2ae17dSArnaldo Carvalho de Melo len = skb->len - skb_transport_offset(skb); 582357b40a1SHerbert Xu if (offset >= len) { 583357b40a1SHerbert Xu offset -= len; 584357b40a1SHerbert Xu continue; 5851da177e4SLinus Torvalds } 586357b40a1SHerbert Xu 587357b40a1SHerbert Xu csum_skb = skb; 5881da177e4SLinus Torvalds } 5891da177e4SLinus Torvalds 590357b40a1SHerbert Xu skb = csum_skb; 591357b40a1SHerbert Xu } 592357b40a1SHerbert Xu 593ea2ae17dSArnaldo Carvalho de Melo offset += skb_transport_offset(skb); 594a98f9175SDave Jones err = skb_copy_bits(skb, offset, &csum, 2); 595a98f9175SDave Jones if (err < 0) { 596a98f9175SDave Jones ip6_flush_pending_frames(sk); 597a98f9175SDave Jones goto out; 598a98f9175SDave Jones } 599357b40a1SHerbert Xu 6001da177e4SLinus Torvalds /* in case cksum was not initialized */ 601357b40a1SHerbert Xu if (unlikely(csum)) 6025f92a738SAl Viro tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); 6031da177e4SLinus Torvalds 6044c9483b2SDavid S. Miller csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, 6054c9483b2SDavid S. Miller total_len, fl6->flowi6_proto, tmp_csum); 6061da177e4SLinus Torvalds 6074c9483b2SDavid S. Miller if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP) 608f6ab0288SAl Viro csum = CSUM_MANGLED_0; 609357b40a1SHerbert Xu 6108242fc33SHimangi Saraogi BUG_ON(skb_store_bits(skb, offset, &csum, 2)); 611357b40a1SHerbert Xu 6121da177e4SLinus Torvalds send: 6131da177e4SLinus Torvalds err = ip6_push_pending_frames(sk); 6141da177e4SLinus Torvalds out: 6151da177e4SLinus Torvalds return err; 6161da177e4SLinus Torvalds } 6171da177e4SLinus Torvalds 618c3c1a7dbSAl Viro static int rawv6_send_hdrinc(struct sock *sk, struct msghdr *msg, int length, 6194c9483b2SDavid S. Miller struct flowi6 *fl6, struct dst_entry **dstp, 6201da177e4SLinus Torvalds unsigned int flags) 6211da177e4SLinus Torvalds { 6223320da89SHerbert Xu struct ipv6_pinfo *np = inet6_sk(sk); 623adb28c9dSEric W. Biederman struct net *net = sock_net(sk); 6241da177e4SLinus Torvalds struct ipv6hdr *iph; 6251da177e4SLinus Torvalds struct sk_buff *skb; 6261da177e4SLinus Torvalds int err; 6271789a640SEric Dumazet struct rt6_info *rt = (struct rt6_info *)*dstp; 628a7ae1992SHerbert Xu int hlen = LL_RESERVED_SPACE(rt->dst.dev); 629a7ae1992SHerbert Xu int tlen = rt->dst.dev->needed_tailroom; 6301da177e4SLinus Torvalds 631d8d1f30bSChangli Gao if (length > rt->dst.dev->mtu) { 6324c9483b2SDavid S. Miller ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu); 6331da177e4SLinus Torvalds return -EMSGSIZE; 6341da177e4SLinus Torvalds } 6351da177e4SLinus Torvalds if (flags&MSG_PROBE) 6361da177e4SLinus Torvalds goto out; 6371da177e4SLinus Torvalds 638f5184d26SJohannes Berg skb = sock_alloc_send_skb(sk, 639a7ae1992SHerbert Xu length + hlen + tlen + 15, 6401da177e4SLinus Torvalds flags & MSG_DONTWAIT, &err); 64163159f29SIan Morris if (!skb) 6421da177e4SLinus Torvalds goto error; 643a7ae1992SHerbert Xu skb_reserve(skb, hlen); 6441da177e4SLinus Torvalds 6459c9c9ad5SHannes Frederic Sowa skb->protocol = htons(ETH_P_IPV6); 6461da177e4SLinus Torvalds skb->priority = sk->sk_priority; 6474a19ec58SLaszlo Attila Toth skb->mark = sk->sk_mark; 648d8d1f30bSChangli Gao skb_dst_set(skb, &rt->dst); 6491789a640SEric Dumazet *dstp = NULL; 6501da177e4SLinus Torvalds 6511ced98e8SArnaldo Carvalho de Melo skb_put(skb, length); 6521ced98e8SArnaldo Carvalho de Melo skb_reset_network_header(skb); 6530660e03fSArnaldo Carvalho de Melo iph = ipv6_hdr(skb); 6541da177e4SLinus Torvalds 6551da177e4SLinus Torvalds skb->ip_summed = CHECKSUM_NONE; 6561da177e4SLinus Torvalds 6570dec879fSJulian Anastasov if (flags & MSG_CONFIRM) 6580dec879fSJulian Anastasov skb_set_dst_pending_confirm(skb, 1); 6590dec879fSJulian Anastasov 660b0e380b1SArnaldo Carvalho de Melo skb->transport_header = skb->network_header; 66121226abbSAl Viro err = memcpy_from_msg(iph, msg, length); 6621da177e4SLinus Torvalds if (err) 6631da177e4SLinus Torvalds goto error_fault; 6641da177e4SLinus Torvalds 665a8e3e1a9SDavid Ahern /* if egress device is enslaved to an L3 master device pass the 666a8e3e1a9SDavid Ahern * skb to its handler for processing 667a8e3e1a9SDavid Ahern */ 668a8e3e1a9SDavid Ahern skb = l3mdev_ip6_out(sk, skb); 669a8e3e1a9SDavid Ahern if (unlikely(!skb)) 670a8e3e1a9SDavid Ahern return 0; 671a8e3e1a9SDavid Ahern 672adb28c9dSEric W. Biederman IP6_UPD_PO_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len); 67329a26a56SEric W. Biederman err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, net, sk, skb, 67413206b6bSEric W. Biederman NULL, rt->dst.dev, dst_output); 6751da177e4SLinus Torvalds if (err > 0) 6766ce9e7b5SEric Dumazet err = net_xmit_errno(err); 6771da177e4SLinus Torvalds if (err) 6781da177e4SLinus Torvalds goto error; 6791da177e4SLinus Torvalds out: 6801da177e4SLinus Torvalds return 0; 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds error_fault: 6831da177e4SLinus Torvalds err = -EFAULT; 6841da177e4SLinus Torvalds kfree_skb(skb); 6851da177e4SLinus Torvalds error: 686adb28c9dSEric W. Biederman IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); 6876ce9e7b5SEric Dumazet if (err == -ENOBUFS && !np->recverr) 6886ce9e7b5SEric Dumazet err = 0; 6891da177e4SLinus Torvalds return err; 6901da177e4SLinus Torvalds } 6911da177e4SLinus Torvalds 69219e3c66bSAl Viro struct raw6_frag_vec { 69319e3c66bSAl Viro struct msghdr *msg; 69419e3c66bSAl Viro int hlen; 69519e3c66bSAl Viro char c[4]; 69619e3c66bSAl Viro }; 69719e3c66bSAl Viro 69819e3c66bSAl Viro static int rawv6_probe_proto_opt(struct raw6_frag_vec *rfv, struct flowi6 *fl6) 6991da177e4SLinus Torvalds { 70019e3c66bSAl Viro int err = 0; 7014c9483b2SDavid S. Miller switch (fl6->flowi6_proto) { 7021da177e4SLinus Torvalds case IPPROTO_ICMPV6: 70319e3c66bSAl Viro rfv->hlen = 2; 70419e3c66bSAl Viro err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen); 70519e3c66bSAl Viro if (!err) { 70619e3c66bSAl Viro fl6->fl6_icmp_type = rfv->c[0]; 70719e3c66bSAl Viro fl6->fl6_icmp_code = rfv->c[1]; 7081da177e4SLinus Torvalds } 7091da177e4SLinus Torvalds break; 7106e8f4d48SMasahide NAKAMURA case IPPROTO_MH: 71119e3c66bSAl Viro rfv->hlen = 4; 71219e3c66bSAl Viro err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen); 71319e3c66bSAl Viro if (!err) 71419e3c66bSAl Viro fl6->fl6_mh_type = rfv->c[2]; 71519e3c66bSAl Viro } 71619e3c66bSAl Viro return err; 71719e3c66bSAl Viro } 7186e8f4d48SMasahide NAKAMURA 71919e3c66bSAl Viro static int raw6_getfrag(void *from, char *to, int offset, int len, int odd, 72019e3c66bSAl Viro struct sk_buff *skb) 72119e3c66bSAl Viro { 72219e3c66bSAl Viro struct raw6_frag_vec *rfv = from; 72319e3c66bSAl Viro 72419e3c66bSAl Viro if (offset < rfv->hlen) { 72519e3c66bSAl Viro int copy = min(rfv->hlen - offset, len); 72619e3c66bSAl Viro 72719e3c66bSAl Viro if (skb->ip_summed == CHECKSUM_PARTIAL) 72819e3c66bSAl Viro memcpy(to, rfv->c + offset, copy); 72919e3c66bSAl Viro else 73019e3c66bSAl Viro skb->csum = csum_block_add( 73119e3c66bSAl Viro skb->csum, 73219e3c66bSAl Viro csum_partial_copy_nocheck(rfv->c + offset, 73319e3c66bSAl Viro to, copy, 0), 73419e3c66bSAl Viro odd); 73519e3c66bSAl Viro 73619e3c66bSAl Viro odd = 0; 73719e3c66bSAl Viro offset += copy; 73819e3c66bSAl Viro to += copy; 73919e3c66bSAl Viro len -= copy; 74019e3c66bSAl Viro 74119e3c66bSAl Viro if (!len) 742a27b58feSHeiko Carstens return 0; 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds 74519e3c66bSAl Viro offset -= rfv->hlen; 74619e3c66bSAl Viro 747f69e6d13SAl Viro return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb); 74819e3c66bSAl Viro } 74919e3c66bSAl Viro 7501b784140SYing Xue static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) 7511da177e4SLinus Torvalds { 75245f6fad8SEric Dumazet struct ipv6_txoptions *opt_to_free = NULL; 7531da177e4SLinus Torvalds struct ipv6_txoptions opt_space; 754342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); 75520c59de2SArnaud Ebalard struct in6_addr *daddr, *final_p, final; 7561da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 7571da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 7581da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 7591da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL; 7601da177e4SLinus Torvalds struct ip6_flowlabel *flowlabel = NULL; 7611da177e4SLinus Torvalds struct dst_entry *dst = NULL; 76219e3c66bSAl Viro struct raw6_frag_vec rfv; 7634c9483b2SDavid S. Miller struct flowi6 fl6; 764ad1e46a8SSoheil Hassas Yeganeh struct sockcm_cookie sockc; 76526879da5SWei Wang struct ipcm6_cookie ipc6; 7661da177e4SLinus Torvalds int addr_len = msg->msg_namelen; 7671da177e4SLinus Torvalds u16 proto; 7681da177e4SLinus Torvalds int err; 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds /* Rough check on arithmetic overflow, 771b59e139bSYOSHIFUJI Hideaki better check is made in ip6_append_data(). 7721da177e4SLinus Torvalds */ 773b59e139bSYOSHIFUJI Hideaki if (len > INT_MAX) 7741da177e4SLinus Torvalds return -EMSGSIZE; 7751da177e4SLinus Torvalds 7761da177e4SLinus Torvalds /* Mirror BSD error message compatibility */ 7771da177e4SLinus Torvalds if (msg->msg_flags & MSG_OOB) 7781da177e4SLinus Torvalds return -EOPNOTSUPP; 7791da177e4SLinus Torvalds 7801da177e4SLinus Torvalds /* 7811da177e4SLinus Torvalds * Get and verify the address. 7821da177e4SLinus Torvalds */ 7834c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 7841da177e4SLinus Torvalds 7854c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 786e2d118a1SLorenzo Colitti fl6.flowi6_uid = sk->sk_uid; 7874a19ec58SLaszlo Attila Toth 78826879da5SWei Wang ipc6.hlimit = -1; 78926879da5SWei Wang ipc6.tclass = -1; 79026879da5SWei Wang ipc6.dontfrag = -1; 79126879da5SWei Wang ipc6.opt = NULL; 79226879da5SWei Wang 7931da177e4SLinus Torvalds if (sin6) { 7941da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133) 7951da177e4SLinus Torvalds return -EINVAL; 7961da177e4SLinus Torvalds 7971da177e4SLinus Torvalds if (sin6->sin6_family && sin6->sin6_family != AF_INET6) 798a02cec21SEric Dumazet return -EAFNOSUPPORT; 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds /* port is the proto value [0..255] carried in nexthdr */ 8011da177e4SLinus Torvalds proto = ntohs(sin6->sin6_port); 8021da177e4SLinus Torvalds 8031da177e4SLinus Torvalds if (!proto) 804c720c7e8SEric Dumazet proto = inet->inet_num; 805c720c7e8SEric Dumazet else if (proto != inet->inet_num) 806a02cec21SEric Dumazet return -EINVAL; 8071da177e4SLinus Torvalds 8081da177e4SLinus Torvalds if (proto > 255) 809a02cec21SEric Dumazet return -EINVAL; 8101da177e4SLinus Torvalds 8111da177e4SLinus Torvalds daddr = &sin6->sin6_addr; 8121da177e4SLinus Torvalds if (np->sndflow) { 8134c9483b2SDavid S. Miller fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 8144c9483b2SDavid S. Miller if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { 8154c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 81663159f29SIan Morris if (!flowlabel) 8171da177e4SLinus Torvalds return -EINVAL; 8181da177e4SLinus Torvalds } 8191da177e4SLinus Torvalds } 8201da177e4SLinus Torvalds 8211da177e4SLinus Torvalds /* 8221da177e4SLinus Torvalds * Otherwise it will be difficult to maintain 8231da177e4SLinus Torvalds * sk->sk_dst_cache. 8241da177e4SLinus Torvalds */ 8251da177e4SLinus Torvalds if (sk->sk_state == TCP_ESTABLISHED && 826efe4208fSEric Dumazet ipv6_addr_equal(daddr, &sk->sk_v6_daddr)) 827efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 8281da177e4SLinus Torvalds 8291da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) && 8301da177e4SLinus Torvalds sin6->sin6_scope_id && 831842df073SHannes Frederic Sowa __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) 8324c9483b2SDavid S. Miller fl6.flowi6_oif = sin6->sin6_scope_id; 8331da177e4SLinus Torvalds } else { 8341da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 8351da177e4SLinus Torvalds return -EDESTADDRREQ; 8361da177e4SLinus Torvalds 837c720c7e8SEric Dumazet proto = inet->inet_num; 838efe4208fSEric Dumazet daddr = &sk->sk_v6_daddr; 8394c9483b2SDavid S. Miller fl6.flowlabel = np->flow_label; 8401da177e4SLinus Torvalds } 8411da177e4SLinus Torvalds 8424c9483b2SDavid S. Miller if (fl6.flowi6_oif == 0) 8434c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 8441da177e4SLinus Torvalds 845c14ac945SSoheil Hassas Yeganeh sockc.tsflags = sk->sk_tsflags; 8461da177e4SLinus Torvalds if (msg->msg_controllen) { 8471da177e4SLinus Torvalds opt = &opt_space; 8481da177e4SLinus Torvalds memset(opt, 0, sizeof(struct ipv6_txoptions)); 8491da177e4SLinus Torvalds opt->tot_len = sizeof(struct ipv6_txoptions); 85026879da5SWei Wang ipc6.opt = opt; 8511da177e4SLinus Torvalds 85226879da5SWei Wang err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6, &sockc); 8531da177e4SLinus Torvalds if (err < 0) { 8541da177e4SLinus Torvalds fl6_sock_release(flowlabel); 8551da177e4SLinus Torvalds return err; 8561da177e4SLinus Torvalds } 8574c9483b2SDavid S. Miller if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 8584c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 85963159f29SIan Morris if (!flowlabel) 8601da177e4SLinus Torvalds return -EINVAL; 8611da177e4SLinus Torvalds } 8621da177e4SLinus Torvalds if (!(opt->opt_nflen|opt->opt_flen)) 8631da177e4SLinus Torvalds opt = NULL; 8641da177e4SLinus Torvalds } 86545f6fad8SEric Dumazet if (!opt) { 86645f6fad8SEric Dumazet opt = txopt_get(np); 86745f6fad8SEric Dumazet opt_to_free = opt; 86845f6fad8SEric Dumazet } 869df9890c3SYOSHIFUJI Hideaki if (flowlabel) 8701da177e4SLinus Torvalds opt = fl6_merge_options(&opt_space, flowlabel, opt); 871df9890c3SYOSHIFUJI Hideaki opt = ipv6_fixup_options(&opt_space, opt); 8721da177e4SLinus Torvalds 8734c9483b2SDavid S. Miller fl6.flowi6_proto = proto; 87419e3c66bSAl Viro rfv.msg = msg; 87519e3c66bSAl Viro rfv.hlen = 0; 87619e3c66bSAl Viro err = rawv6_probe_proto_opt(&rfv, &fl6); 877a27b58feSHeiko Carstens if (err) 878a27b58feSHeiko Carstens goto out; 8791da177e4SLinus Torvalds 880876c7f41SBrian Haley if (!ipv6_addr_any(daddr)) 8814e3fd7a0SAlexey Dobriyan fl6.daddr = *daddr; 882876c7f41SBrian Haley else 8834c9483b2SDavid S. Miller fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ 8844c9483b2SDavid S. Miller if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) 8854e3fd7a0SAlexey Dobriyan fl6.saddr = np->saddr; 8861da177e4SLinus Torvalds 8874c9483b2SDavid S. Miller final_p = fl6_update_dst(&fl6, opt, &final); 8881da177e4SLinus Torvalds 8894c9483b2SDavid S. Miller if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) 8904c9483b2SDavid S. Miller fl6.flowi6_oif = np->mcast_oif; 891c4062dfcSErich E. Hoover else if (!fl6.flowi6_oif) 892c4062dfcSErich E. Hoover fl6.flowi6_oif = np->ucast_oif; 8934c9483b2SDavid S. Miller security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); 8941da177e4SLinus Torvalds 89548e8aa6eSMartin KaFai Lau if (inet->hdrincl) 89648e8aa6eSMartin KaFai Lau fl6.flowi6_flags |= FLOWI_FLAG_KNOWN_NH; 89748e8aa6eSMartin KaFai Lau 89838b7097bSHannes Frederic Sowa if (ipc6.tclass < 0) 89938b7097bSHannes Frederic Sowa ipc6.tclass = np->tclass; 90038b7097bSHannes Frederic Sowa 90138b7097bSHannes Frederic Sowa fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel); 90238b7097bSHannes Frederic Sowa 9030e0d44abSSteffen Klassert dst = ip6_dst_lookup_flow(sk, &fl6, final_p); 90468d0c6d3SDavid S. Miller if (IS_ERR(dst)) { 90568d0c6d3SDavid S. Miller err = PTR_ERR(dst); 9061da177e4SLinus Torvalds goto out; 90714e50e57SDavid S. Miller } 90826879da5SWei Wang if (ipc6.hlimit < 0) 90926879da5SWei Wang ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst); 9101da177e4SLinus Torvalds 91126879da5SWei Wang if (ipc6.dontfrag < 0) 91226879da5SWei Wang ipc6.dontfrag = np->dontfrag; 91313b52cd4SBrian Haley 9141da177e4SLinus Torvalds if (msg->msg_flags&MSG_CONFIRM) 9151da177e4SLinus Torvalds goto do_confirm; 9161da177e4SLinus Torvalds 9171da177e4SLinus Torvalds back_from_confirm: 9181789a640SEric Dumazet if (inet->hdrincl) 919c3c1a7dbSAl Viro err = rawv6_send_hdrinc(sk, msg, len, &fl6, &dst, msg->msg_flags); 9201789a640SEric Dumazet else { 92126879da5SWei Wang ipc6.opt = opt; 9221da177e4SLinus Torvalds lock_sock(sk); 92319e3c66bSAl Viro err = ip6_append_data(sk, raw6_getfrag, &rfv, 92426879da5SWei Wang len, 0, &ipc6, &fl6, (struct rt6_info *)dst, 92526879da5SWei Wang msg->msg_flags, &sockc); 9261da177e4SLinus Torvalds 9271da177e4SLinus Torvalds if (err) 9281da177e4SLinus Torvalds ip6_flush_pending_frames(sk); 9291da177e4SLinus Torvalds else if (!(msg->msg_flags & MSG_MORE)) 9304c9483b2SDavid S. Miller err = rawv6_push_pending_frames(sk, &fl6, rp); 9313ef9d943SYOSHIFUJI Hideaki release_sock(sk); 9321da177e4SLinus Torvalds } 9331da177e4SLinus Torvalds done: 9346d3e85ecSNicolas DICHTEL dst_release(dst); 9351da177e4SLinus Torvalds out: 9361da177e4SLinus Torvalds fl6_sock_release(flowlabel); 93745f6fad8SEric Dumazet txopt_put(opt_to_free); 9381da177e4SLinus Torvalds return err < 0 ? err : len; 9391da177e4SLinus Torvalds do_confirm: 9400dec879fSJulian Anastasov if (msg->msg_flags & MSG_PROBE) 9410dec879fSJulian Anastasov dst_confirm_neigh(dst, &fl6.daddr); 9421da177e4SLinus Torvalds if (!(msg->msg_flags & MSG_PROBE) || len) 9431da177e4SLinus Torvalds goto back_from_confirm; 9441da177e4SLinus Torvalds err = 0; 9451da177e4SLinus Torvalds goto done; 9461da177e4SLinus Torvalds } 9471da177e4SLinus Torvalds 9481da177e4SLinus Torvalds static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, 9491da177e4SLinus Torvalds char __user *optval, int optlen) 9501da177e4SLinus Torvalds { 9511da177e4SLinus Torvalds switch (optname) { 9521da177e4SLinus Torvalds case ICMPV6_FILTER: 9531da177e4SLinus Torvalds if (optlen > sizeof(struct icmp6_filter)) 9541da177e4SLinus Torvalds optlen = sizeof(struct icmp6_filter); 9551da177e4SLinus Torvalds if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) 9561da177e4SLinus Torvalds return -EFAULT; 9571da177e4SLinus Torvalds return 0; 9581da177e4SLinus Torvalds default: 9591da177e4SLinus Torvalds return -ENOPROTOOPT; 9603ff50b79SStephen Hemminger } 9611da177e4SLinus Torvalds 9621da177e4SLinus Torvalds return 0; 9631da177e4SLinus Torvalds } 9641da177e4SLinus Torvalds 9651da177e4SLinus Torvalds static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, 9661da177e4SLinus Torvalds char __user *optval, int __user *optlen) 9671da177e4SLinus Torvalds { 9681da177e4SLinus Torvalds int len; 9691da177e4SLinus Torvalds 9701da177e4SLinus Torvalds switch (optname) { 9711da177e4SLinus Torvalds case ICMPV6_FILTER: 9721da177e4SLinus Torvalds if (get_user(len, optlen)) 9731da177e4SLinus Torvalds return -EFAULT; 9741da177e4SLinus Torvalds if (len < 0) 9751da177e4SLinus Torvalds return -EINVAL; 9761da177e4SLinus Torvalds if (len > sizeof(struct icmp6_filter)) 9771da177e4SLinus Torvalds len = sizeof(struct icmp6_filter); 9781da177e4SLinus Torvalds if (put_user(len, optlen)) 9791da177e4SLinus Torvalds return -EFAULT; 9801da177e4SLinus Torvalds if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) 9811da177e4SLinus Torvalds return -EFAULT; 9821da177e4SLinus Torvalds return 0; 9831da177e4SLinus Torvalds default: 9841da177e4SLinus Torvalds return -ENOPROTOOPT; 9853ff50b79SStephen Hemminger } 9861da177e4SLinus Torvalds 9871da177e4SLinus Torvalds return 0; 9881da177e4SLinus Torvalds } 9891da177e4SLinus Torvalds 9901da177e4SLinus Torvalds 9913fdadf7dSDmitry Mishin static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, 992b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 9931da177e4SLinus Torvalds { 9941da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 9951da177e4SLinus Torvalds int val; 9961da177e4SLinus Torvalds 9971da177e4SLinus Torvalds if (get_user(val, (int __user *)optval)) 9981da177e4SLinus Torvalds return -EFAULT; 9991da177e4SLinus Torvalds 10001da177e4SLinus Torvalds switch (optname) { 1001715f504bSHannes Frederic Sowa case IPV6_HDRINCL: 1002715f504bSHannes Frederic Sowa if (sk->sk_type != SOCK_RAW) 1003715f504bSHannes Frederic Sowa return -EINVAL; 1004715f504bSHannes Frederic Sowa inet_sk(sk)->hdrincl = !!val; 1005715f504bSHannes Frederic Sowa return 0; 10061da177e4SLinus Torvalds case IPV6_CHECKSUM: 1007c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 && 10081a98d05fSYOSHIFUJI Hideaki level == IPPROTO_IPV6) { 10091a98d05fSYOSHIFUJI Hideaki /* 10101a98d05fSYOSHIFUJI Hideaki * RFC3542 tells that IPV6_CHECKSUM socket 10111a98d05fSYOSHIFUJI Hideaki * option in the IPPROTO_IPV6 level is not 10121a98d05fSYOSHIFUJI Hideaki * allowed on ICMPv6 sockets. 10131a98d05fSYOSHIFUJI Hideaki * If you want to set it, use IPPROTO_RAW 10141a98d05fSYOSHIFUJI Hideaki * level IPV6_CHECKSUM socket option 10151a98d05fSYOSHIFUJI Hideaki * (Linux extension). 10161a98d05fSYOSHIFUJI Hideaki */ 10171a98d05fSYOSHIFUJI Hideaki return -EINVAL; 10181a98d05fSYOSHIFUJI Hideaki } 10191a98d05fSYOSHIFUJI Hideaki 10201da177e4SLinus Torvalds /* You may get strange result with a positive odd offset; 10211da177e4SLinus Torvalds RFC2292bis agrees with me. */ 10221da177e4SLinus Torvalds if (val > 0 && (val&1)) 1023a02cec21SEric Dumazet return -EINVAL; 10241da177e4SLinus Torvalds if (val < 0) { 10251da177e4SLinus Torvalds rp->checksum = 0; 10261da177e4SLinus Torvalds } else { 10271da177e4SLinus Torvalds rp->checksum = 1; 10281da177e4SLinus Torvalds rp->offset = val; 10291da177e4SLinus Torvalds } 10301da177e4SLinus Torvalds 10311da177e4SLinus Torvalds return 0; 10321da177e4SLinus Torvalds 10331da177e4SLinus Torvalds default: 1034a02cec21SEric Dumazet return -ENOPROTOOPT; 10351da177e4SLinus Torvalds } 10361da177e4SLinus Torvalds } 10371da177e4SLinus Torvalds 10383fdadf7dSDmitry Mishin static int rawv6_setsockopt(struct sock *sk, int level, int optname, 1039b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 10401da177e4SLinus Torvalds { 10411da177e4SLinus Torvalds switch (level) { 10421da177e4SLinus Torvalds case SOL_RAW: 10431da177e4SLinus Torvalds break; 10441da177e4SLinus Torvalds 10451da177e4SLinus Torvalds case SOL_ICMPV6: 1046c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) 10471da177e4SLinus Torvalds return -EOPNOTSUPP; 1048207ec0abSJoe Perches return rawv6_seticmpfilter(sk, level, optname, optval, optlen); 10491da177e4SLinus Torvalds case SOL_IPV6: 1050715f504bSHannes Frederic Sowa if (optname == IPV6_CHECKSUM || 1051715f504bSHannes Frederic Sowa optname == IPV6_HDRINCL) 10521da177e4SLinus Torvalds break; 10531da177e4SLinus Torvalds default: 1054207ec0abSJoe Perches return ipv6_setsockopt(sk, level, optname, optval, optlen); 10553ff50b79SStephen Hemminger } 10563ff50b79SStephen Hemminger 10573fdadf7dSDmitry Mishin return do_rawv6_setsockopt(sk, level, optname, optval, optlen); 10583fdadf7dSDmitry Mishin } 10593fdadf7dSDmitry Mishin 10603fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 10613fdadf7dSDmitry Mishin static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, 1062b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 10633fdadf7dSDmitry Mishin { 10643fdadf7dSDmitry Mishin switch (level) { 10653fdadf7dSDmitry Mishin case SOL_RAW: 10663fdadf7dSDmitry Mishin break; 10673fdadf7dSDmitry Mishin case SOL_ICMPV6: 1068c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) 10693fdadf7dSDmitry Mishin return -EOPNOTSUPP; 1070543d9cfeSArnaldo Carvalho de Melo return rawv6_seticmpfilter(sk, level, optname, optval, optlen); 10713fdadf7dSDmitry Mishin case SOL_IPV6: 1072715f504bSHannes Frederic Sowa if (optname == IPV6_CHECKSUM || 1073715f504bSHannes Frederic Sowa optname == IPV6_HDRINCL) 10743fdadf7dSDmitry Mishin break; 10753fdadf7dSDmitry Mishin default: 1076543d9cfeSArnaldo Carvalho de Melo return compat_ipv6_setsockopt(sk, level, optname, 1077543d9cfeSArnaldo Carvalho de Melo optval, optlen); 10783ff50b79SStephen Hemminger } 10793fdadf7dSDmitry Mishin return do_rawv6_setsockopt(sk, level, optname, optval, optlen); 10803fdadf7dSDmitry Mishin } 10813fdadf7dSDmitry Mishin #endif 10823fdadf7dSDmitry Mishin 10833fdadf7dSDmitry Mishin static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, 10843fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 10853fdadf7dSDmitry Mishin { 10863fdadf7dSDmitry Mishin struct raw6_sock *rp = raw6_sk(sk); 10873fdadf7dSDmitry Mishin int val, len; 10881da177e4SLinus Torvalds 10891da177e4SLinus Torvalds if (get_user(len, optlen)) 10901da177e4SLinus Torvalds return -EFAULT; 10911da177e4SLinus Torvalds 10921da177e4SLinus Torvalds switch (optname) { 1093715f504bSHannes Frederic Sowa case IPV6_HDRINCL: 1094715f504bSHannes Frederic Sowa val = inet_sk(sk)->hdrincl; 1095715f504bSHannes Frederic Sowa break; 10961da177e4SLinus Torvalds case IPV6_CHECKSUM: 10971a98d05fSYOSHIFUJI Hideaki /* 10981a98d05fSYOSHIFUJI Hideaki * We allow getsockopt() for IPPROTO_IPV6-level 10991a98d05fSYOSHIFUJI Hideaki * IPV6_CHECKSUM socket option on ICMPv6 sockets 11001a98d05fSYOSHIFUJI Hideaki * since RFC3542 is silent about it. 11011a98d05fSYOSHIFUJI Hideaki */ 11021da177e4SLinus Torvalds if (rp->checksum == 0) 11031da177e4SLinus Torvalds val = -1; 11041da177e4SLinus Torvalds else 11051da177e4SLinus Torvalds val = rp->offset; 11061da177e4SLinus Torvalds break; 11071da177e4SLinus Torvalds 11081da177e4SLinus Torvalds default: 11091da177e4SLinus Torvalds return -ENOPROTOOPT; 11101da177e4SLinus Torvalds } 11111da177e4SLinus Torvalds 11121da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len); 11131da177e4SLinus Torvalds 11141da177e4SLinus Torvalds if (put_user(len, optlen)) 11151da177e4SLinus Torvalds return -EFAULT; 11161da177e4SLinus Torvalds if (copy_to_user(optval, &val, len)) 11171da177e4SLinus Torvalds return -EFAULT; 11181da177e4SLinus Torvalds return 0; 11191da177e4SLinus Torvalds } 11201da177e4SLinus Torvalds 11213fdadf7dSDmitry Mishin static int rawv6_getsockopt(struct sock *sk, int level, int optname, 11223fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 11233fdadf7dSDmitry Mishin { 11243fdadf7dSDmitry Mishin switch (level) { 11253fdadf7dSDmitry Mishin case SOL_RAW: 11263fdadf7dSDmitry Mishin break; 11273fdadf7dSDmitry Mishin 11283fdadf7dSDmitry Mishin case SOL_ICMPV6: 1129c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) 11303fdadf7dSDmitry Mishin return -EOPNOTSUPP; 1131207ec0abSJoe Perches return rawv6_geticmpfilter(sk, level, optname, optval, optlen); 11323fdadf7dSDmitry Mishin case SOL_IPV6: 1133715f504bSHannes Frederic Sowa if (optname == IPV6_CHECKSUM || 1134715f504bSHannes Frederic Sowa optname == IPV6_HDRINCL) 11353fdadf7dSDmitry Mishin break; 11363fdadf7dSDmitry Mishin default: 1137207ec0abSJoe Perches return ipv6_getsockopt(sk, level, optname, optval, optlen); 11383ff50b79SStephen Hemminger } 11393ff50b79SStephen Hemminger 11403fdadf7dSDmitry Mishin return do_rawv6_getsockopt(sk, level, optname, optval, optlen); 11413fdadf7dSDmitry Mishin } 11423fdadf7dSDmitry Mishin 11433fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 11443fdadf7dSDmitry Mishin static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, 11453fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 11463fdadf7dSDmitry Mishin { 11473fdadf7dSDmitry Mishin switch (level) { 11483fdadf7dSDmitry Mishin case SOL_RAW: 11493fdadf7dSDmitry Mishin break; 11503fdadf7dSDmitry Mishin case SOL_ICMPV6: 1151c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) 11523fdadf7dSDmitry Mishin return -EOPNOTSUPP; 1153543d9cfeSArnaldo Carvalho de Melo return rawv6_geticmpfilter(sk, level, optname, optval, optlen); 11543fdadf7dSDmitry Mishin case SOL_IPV6: 1155715f504bSHannes Frederic Sowa if (optname == IPV6_CHECKSUM || 1156715f504bSHannes Frederic Sowa optname == IPV6_HDRINCL) 11573fdadf7dSDmitry Mishin break; 11583fdadf7dSDmitry Mishin default: 1159543d9cfeSArnaldo Carvalho de Melo return compat_ipv6_getsockopt(sk, level, optname, 1160543d9cfeSArnaldo Carvalho de Melo optval, optlen); 11613ff50b79SStephen Hemminger } 11623fdadf7dSDmitry Mishin return do_rawv6_getsockopt(sk, level, optname, optval, optlen); 11633fdadf7dSDmitry Mishin } 11643fdadf7dSDmitry Mishin #endif 11653fdadf7dSDmitry Mishin 11661da177e4SLinus Torvalds static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) 11671da177e4SLinus Torvalds { 11681da177e4SLinus Torvalds switch (cmd) { 1169207ec0abSJoe Perches case SIOCOUTQ: { 117031e6d363SEric Dumazet int amount = sk_wmem_alloc_get(sk); 117131e6d363SEric Dumazet 11721da177e4SLinus Torvalds return put_user(amount, (int __user *)arg); 11731da177e4SLinus Torvalds } 1174207ec0abSJoe Perches case SIOCINQ: { 11751da177e4SLinus Torvalds struct sk_buff *skb; 11761da177e4SLinus Torvalds int amount = 0; 11771da177e4SLinus Torvalds 1178e0f9f858SHerbert Xu spin_lock_bh(&sk->sk_receive_queue.lock); 11791da177e4SLinus Torvalds skb = skb_peek(&sk->sk_receive_queue); 118053b24b8fSIan Morris if (skb) 1181105f5528SJamie Bainbridge amount = skb->len; 1182e0f9f858SHerbert Xu spin_unlock_bh(&sk->sk_receive_queue.lock); 11831da177e4SLinus Torvalds return put_user(amount, (int __user *)arg); 11841da177e4SLinus Torvalds } 11851da177e4SLinus Torvalds 11861da177e4SLinus Torvalds default: 11877bc570c8SYOSHIFUJI Hideaki #ifdef CONFIG_IPV6_MROUTE 11887bc570c8SYOSHIFUJI Hideaki return ip6mr_ioctl(sk, cmd, (void __user *)arg); 11897bc570c8SYOSHIFUJI Hideaki #else 11901da177e4SLinus Torvalds return -ENOIOCTLCMD; 11917bc570c8SYOSHIFUJI Hideaki #endif 11921da177e4SLinus Torvalds } 11931da177e4SLinus Torvalds } 11941da177e4SLinus Torvalds 1195e2d57766SDavid S. Miller #ifdef CONFIG_COMPAT 1196e2d57766SDavid S. Miller static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) 1197e2d57766SDavid S. Miller { 1198e2d57766SDavid S. Miller switch (cmd) { 1199e2d57766SDavid S. Miller case SIOCOUTQ: 1200e2d57766SDavid S. Miller case SIOCINQ: 1201e2d57766SDavid S. Miller return -ENOIOCTLCMD; 1202e2d57766SDavid S. Miller default: 1203e2d57766SDavid S. Miller #ifdef CONFIG_IPV6_MROUTE 1204e2d57766SDavid S. Miller return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg)); 1205e2d57766SDavid S. Miller #else 1206e2d57766SDavid S. Miller return -ENOIOCTLCMD; 1207e2d57766SDavid S. Miller #endif 1208e2d57766SDavid S. Miller } 1209e2d57766SDavid S. Miller } 1210e2d57766SDavid S. Miller #endif 1211e2d57766SDavid S. Miller 12121da177e4SLinus Torvalds static void rawv6_close(struct sock *sk, long timeout) 12131da177e4SLinus Torvalds { 1214c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num == IPPROTO_RAW) 1215725a8ff0SDenis V. Lunev ip6_ra_control(sk, -1); 12167bc570c8SYOSHIFUJI Hideaki ip6mr_sk_done(sk); 12171da177e4SLinus Torvalds sk_common_release(sk); 12181da177e4SLinus Torvalds } 12191da177e4SLinus Torvalds 12207d06b2e0SBrian Haley static void raw6_destroy(struct sock *sk) 122122dd4850SDenis V. Lunev { 122222dd4850SDenis V. Lunev lock_sock(sk); 122322dd4850SDenis V. Lunev ip6_flush_pending_frames(sk); 122422dd4850SDenis V. Lunev release_sock(sk); 1225f23d60deSDavid S. Miller 12267d06b2e0SBrian Haley inet6_destroy_sock(sk); 122722dd4850SDenis V. Lunev } 122822dd4850SDenis V. Lunev 12291da177e4SLinus Torvalds static int rawv6_init_sk(struct sock *sk) 12301da177e4SLinus Torvalds { 12311da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 1232f48d5ff1SMasahide NAKAMURA 1233c720c7e8SEric Dumazet switch (inet_sk(sk)->inet_num) { 1234f48d5ff1SMasahide NAKAMURA case IPPROTO_ICMPV6: 12351da177e4SLinus Torvalds rp->checksum = 1; 12361da177e4SLinus Torvalds rp->offset = 2; 1237f48d5ff1SMasahide NAKAMURA break; 1238f48d5ff1SMasahide NAKAMURA case IPPROTO_MH: 1239f48d5ff1SMasahide NAKAMURA rp->checksum = 1; 1240f48d5ff1SMasahide NAKAMURA rp->offset = 4; 1241f48d5ff1SMasahide NAKAMURA break; 1242f48d5ff1SMasahide NAKAMURA default: 1243f48d5ff1SMasahide NAKAMURA break; 12441da177e4SLinus Torvalds } 1245a02cec21SEric Dumazet return 0; 12461da177e4SLinus Torvalds } 12471da177e4SLinus Torvalds 12481da177e4SLinus Torvalds struct proto rawv6_prot = { 12491da177e4SLinus Torvalds .name = "RAWv6", 12501da177e4SLinus Torvalds .owner = THIS_MODULE, 12511da177e4SLinus Torvalds .close = rawv6_close, 125222dd4850SDenis V. Lunev .destroy = raw6_destroy, 125382b276cdSHannes Frederic Sowa .connect = ip6_datagram_connect_v6_only, 1254286c72deSEric Dumazet .disconnect = __udp_disconnect, 12551da177e4SLinus Torvalds .ioctl = rawv6_ioctl, 12561da177e4SLinus Torvalds .init = rawv6_init_sk, 12571da177e4SLinus Torvalds .setsockopt = rawv6_setsockopt, 12581da177e4SLinus Torvalds .getsockopt = rawv6_getsockopt, 12591da177e4SLinus Torvalds .sendmsg = rawv6_sendmsg, 12601da177e4SLinus Torvalds .recvmsg = rawv6_recvmsg, 12611da177e4SLinus Torvalds .bind = rawv6_bind, 12621da177e4SLinus Torvalds .backlog_rcv = rawv6_rcv_skb, 1263fc8717baSPavel Emelyanov .hash = raw_hash_sk, 1264fc8717baSPavel Emelyanov .unhash = raw_unhash_sk, 12651da177e4SLinus Torvalds .obj_size = sizeof(struct raw6_sock), 1266fc8717baSPavel Emelyanov .h.raw_hash = &raw_v6_hashinfo, 1267543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 1268543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_rawv6_setsockopt, 1269543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_rawv6_getsockopt, 1270e2d57766SDavid S. Miller .compat_ioctl = compat_rawv6_ioctl, 1271543d9cfeSArnaldo Carvalho de Melo #endif 1272432490f9SCyrill Gorcunov .diag_destroy = raw_abort, 12731da177e4SLinus Torvalds }; 12741da177e4SLinus Torvalds 12751da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 12761da177e4SLinus Torvalds static int raw6_seq_show(struct seq_file *seq, void *v) 12771da177e4SLinus Torvalds { 127817ef66afSLorenzo Colitti if (v == SEQ_START_TOKEN) { 127917ef66afSLorenzo Colitti seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); 128017ef66afSLorenzo Colitti } else { 128117ef66afSLorenzo Colitti struct sock *sp = v; 128217ef66afSLorenzo Colitti __u16 srcp = inet_sk(sp)->inet_num; 128317ef66afSLorenzo Colitti ip6_dgram_sock_seq_show(seq, v, srcp, 0, 128417ef66afSLorenzo Colitti raw_seq_private(seq)->bucket); 128517ef66afSLorenzo Colitti } 12861da177e4SLinus Torvalds return 0; 12871da177e4SLinus Torvalds } 12881da177e4SLinus Torvalds 128956b3d975SPhilippe De Muyter static const struct seq_operations raw6_seq_ops = { 129042a73808SPavel Emelyanov .start = raw_seq_start, 129142a73808SPavel Emelyanov .next = raw_seq_next, 129242a73808SPavel Emelyanov .stop = raw_seq_stop, 12931da177e4SLinus Torvalds .show = raw6_seq_show, 12941da177e4SLinus Torvalds }; 12951da177e4SLinus Torvalds 12961da177e4SLinus Torvalds static int raw6_seq_open(struct inode *inode, struct file *file) 12971da177e4SLinus Torvalds { 12983046d767SDenis V. Lunev return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops); 12991da177e4SLinus Torvalds } 13001da177e4SLinus Torvalds 13019a32144eSArjan van de Ven static const struct file_operations raw6_seq_fops = { 13021da177e4SLinus Torvalds .owner = THIS_MODULE, 13031da177e4SLinus Torvalds .open = raw6_seq_open, 13041da177e4SLinus Torvalds .read = seq_read, 13051da177e4SLinus Torvalds .llseek = seq_lseek, 1306f51d599fSPavel Emelyanov .release = seq_release_net, 13071da177e4SLinus Torvalds }; 13081da177e4SLinus Torvalds 13092c8c1e72SAlexey Dobriyan static int __net_init raw6_init_net(struct net *net) 1310a308da16SPavel Emelyanov { 1311d4beaa66SGao feng if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops)) 1312a308da16SPavel Emelyanov return -ENOMEM; 1313a308da16SPavel Emelyanov 1314a308da16SPavel Emelyanov return 0; 1315a308da16SPavel Emelyanov } 1316a308da16SPavel Emelyanov 13172c8c1e72SAlexey Dobriyan static void __net_exit raw6_exit_net(struct net *net) 1318a308da16SPavel Emelyanov { 1319ece31ffdSGao feng remove_proc_entry("raw6", net->proc_net); 1320a308da16SPavel Emelyanov } 1321a308da16SPavel Emelyanov 1322a308da16SPavel Emelyanov static struct pernet_operations raw6_net_ops = { 1323a308da16SPavel Emelyanov .init = raw6_init_net, 1324a308da16SPavel Emelyanov .exit = raw6_exit_net, 1325a308da16SPavel Emelyanov }; 1326a308da16SPavel Emelyanov 13271da177e4SLinus Torvalds int __init raw6_proc_init(void) 13281da177e4SLinus Torvalds { 1329a308da16SPavel Emelyanov return register_pernet_subsys(&raw6_net_ops); 13301da177e4SLinus Torvalds } 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds void raw6_proc_exit(void) 13331da177e4SLinus Torvalds { 1334a308da16SPavel Emelyanov unregister_pernet_subsys(&raw6_net_ops); 13351da177e4SLinus Torvalds } 13361da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */ 13377f4e4868SDaniel Lezcano 13387f4e4868SDaniel Lezcano /* Same as inet6_dgram_ops, sans udp_poll. */ 13397f4e4868SDaniel Lezcano static const struct proto_ops inet6_sockraw_ops = { 13407f4e4868SDaniel Lezcano .family = PF_INET6, 13417f4e4868SDaniel Lezcano .owner = THIS_MODULE, 13427f4e4868SDaniel Lezcano .release = inet6_release, 13437f4e4868SDaniel Lezcano .bind = inet6_bind, 13447f4e4868SDaniel Lezcano .connect = inet_dgram_connect, /* ok */ 13457f4e4868SDaniel Lezcano .socketpair = sock_no_socketpair, /* a do nothing */ 13467f4e4868SDaniel Lezcano .accept = sock_no_accept, /* a do nothing */ 13477f4e4868SDaniel Lezcano .getname = inet6_getname, 13487f4e4868SDaniel Lezcano .poll = datagram_poll, /* ok */ 13497f4e4868SDaniel Lezcano .ioctl = inet6_ioctl, /* must change */ 13507f4e4868SDaniel Lezcano .listen = sock_no_listen, /* ok */ 13517f4e4868SDaniel Lezcano .shutdown = inet_shutdown, /* ok */ 13527f4e4868SDaniel Lezcano .setsockopt = sock_common_setsockopt, /* ok */ 13537f4e4868SDaniel Lezcano .getsockopt = sock_common_getsockopt, /* ok */ 13547f4e4868SDaniel Lezcano .sendmsg = inet_sendmsg, /* ok */ 13557f4e4868SDaniel Lezcano .recvmsg = sock_common_recvmsg, /* ok */ 13567f4e4868SDaniel Lezcano .mmap = sock_no_mmap, 13577f4e4868SDaniel Lezcano .sendpage = sock_no_sendpage, 13587f4e4868SDaniel Lezcano #ifdef CONFIG_COMPAT 13597f4e4868SDaniel Lezcano .compat_setsockopt = compat_sock_common_setsockopt, 13607f4e4868SDaniel Lezcano .compat_getsockopt = compat_sock_common_getsockopt, 13617f4e4868SDaniel Lezcano #endif 13627f4e4868SDaniel Lezcano }; 13637f4e4868SDaniel Lezcano 13647f4e4868SDaniel Lezcano static struct inet_protosw rawv6_protosw = { 13657f4e4868SDaniel Lezcano .type = SOCK_RAW, 13667f4e4868SDaniel Lezcano .protocol = IPPROTO_IP, /* wild card */ 13677f4e4868SDaniel Lezcano .prot = &rawv6_prot, 13687f4e4868SDaniel Lezcano .ops = &inet6_sockraw_ops, 13697f4e4868SDaniel Lezcano .flags = INET_PROTOSW_REUSE, 13707f4e4868SDaniel Lezcano }; 13717f4e4868SDaniel Lezcano 13727f4e4868SDaniel Lezcano int __init rawv6_init(void) 13737f4e4868SDaniel Lezcano { 13743d2f6d41SJulia Lawall return inet6_register_protosw(&rawv6_protosw); 13757f4e4868SDaniel Lezcano } 13767f4e4868SDaniel Lezcano 137709f7709fSDaniel Lezcano void rawv6_exit(void) 13787f4e4868SDaniel Lezcano { 13797f4e4868SDaniel Lezcano inet6_unregister_protosw(&rawv6_protosw); 13807f4e4868SDaniel Lezcano } 1381