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> 351da177e4SLinus Torvalds #include <asm/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 68b673e4dfSPavel Emelyanov static struct raw_hashinfo raw_v6_hashinfo = { 69938b93adSRobert P. J. Day .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock), 70b673e4dfSPavel Emelyanov }; 711da177e4SLinus Torvalds 72be185884SPavel Emelyanov static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk, 73b71d1d42SEric Dumazet unsigned short num, const struct in6_addr *loc_addr, 74b71d1d42SEric Dumazet const struct in6_addr *rmt_addr, int dif) 751da177e4SLinus Torvalds { 76a50feda5SEric Dumazet bool is_multicast = ipv6_addr_is_multicast(loc_addr); 771da177e4SLinus Torvalds 78b67bfe0dSSasha Levin sk_for_each_from(sk) 79c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num == num) { 801da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 811da177e4SLinus Torvalds 82878628fbSYOSHIFUJI Hideaki if (!net_eq(sock_net(sk), net)) 83be185884SPavel Emelyanov continue; 84be185884SPavel Emelyanov 851da177e4SLinus Torvalds if (!ipv6_addr_any(&np->daddr) && 861da177e4SLinus Torvalds !ipv6_addr_equal(&np->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 921da177e4SLinus Torvalds if (!ipv6_addr_any(&np->rcv_saddr)) { 931da177e4SLinus Torvalds if (ipv6_addr_equal(&np->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 } 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds /* 1081da177e4SLinus Torvalds * 0 - deliver 1091da177e4SLinus Torvalds * 1 - block 1101da177e4SLinus Torvalds */ 1111b05c4b5SEric Dumazet static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb) 1121da177e4SLinus Torvalds { 1139cc08af3SWerner Almesberger struct icmp6hdr _hdr; 1141b05c4b5SEric Dumazet const struct icmp6hdr *hdr; 1151da177e4SLinus Torvalds 116d1c53c8eSWerner Almesberger /* We require only the four bytes of the ICMPv6 header, not any 117d1c53c8eSWerner Almesberger * additional bytes of message body in "struct icmp6hdr". 118d1c53c8eSWerner Almesberger */ 1191b05c4b5SEric Dumazet hdr = skb_header_pointer(skb, skb_transport_offset(skb), 120d1c53c8eSWerner Almesberger ICMPV6_HDRLEN, &_hdr); 1211b05c4b5SEric Dumazet if (hdr) { 1221b05c4b5SEric Dumazet const __u32 *data = &raw6_sk(sk)->filter.data[0]; 1231b05c4b5SEric Dumazet unsigned int type = hdr->icmp6_type; 1241da177e4SLinus Torvalds 1251b05c4b5SEric Dumazet return (data[type >> 5] & (1U << (type & 31))) != 0; 1261da177e4SLinus Torvalds } 1271b05c4b5SEric Dumazet return 1; 1281da177e4SLinus Torvalds } 1291da177e4SLinus Torvalds 13007a93626SAmerigo Wang #if IS_ENABLED(CONFIG_IPV6_MIP6) 131f2eda47dSEric Dumazet typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb); 13259fbb3a6SMasahide NAKAMURA 133f2eda47dSEric Dumazet static mh_filter_t __rcu *mh_filter __read_mostly; 134f2eda47dSEric Dumazet 135f2eda47dSEric Dumazet int rawv6_mh_filter_register(mh_filter_t filter) 13659fbb3a6SMasahide NAKAMURA { 137cf778b00SEric Dumazet rcu_assign_pointer(mh_filter, filter); 13859fbb3a6SMasahide NAKAMURA return 0; 13959fbb3a6SMasahide NAKAMURA } 14059fbb3a6SMasahide NAKAMURA EXPORT_SYMBOL(rawv6_mh_filter_register); 14159fbb3a6SMasahide NAKAMURA 142f2eda47dSEric Dumazet int rawv6_mh_filter_unregister(mh_filter_t filter) 14359fbb3a6SMasahide NAKAMURA { 144a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(mh_filter, NULL); 14559fbb3a6SMasahide NAKAMURA synchronize_rcu(); 14659fbb3a6SMasahide NAKAMURA return 0; 14759fbb3a6SMasahide NAKAMURA } 14859fbb3a6SMasahide NAKAMURA EXPORT_SYMBOL(rawv6_mh_filter_unregister); 14959fbb3a6SMasahide NAKAMURA 15059fbb3a6SMasahide NAKAMURA #endif 15159fbb3a6SMasahide NAKAMURA 1521da177e4SLinus Torvalds /* 1531da177e4SLinus Torvalds * demultiplex raw sockets. 1541da177e4SLinus Torvalds * (should consider queueing the skb in the sock receive_queue 1551da177e4SLinus Torvalds * without calling rawv6.c) 1561da177e4SLinus Torvalds * 1571da177e4SLinus Torvalds * Caller owns SKB so we must make clones. 1581da177e4SLinus Torvalds */ 159a50feda5SEric Dumazet static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) 1601da177e4SLinus Torvalds { 161b71d1d42SEric Dumazet const struct in6_addr *saddr; 162b71d1d42SEric Dumazet const struct in6_addr *daddr; 1631da177e4SLinus Torvalds struct sock *sk; 164a50feda5SEric Dumazet bool delivered = false; 1651da177e4SLinus Torvalds __u8 hash; 166be185884SPavel Emelyanov struct net *net; 1671da177e4SLinus Torvalds 1680660e03fSArnaldo Carvalho de Melo saddr = &ipv6_hdr(skb)->saddr; 1691da177e4SLinus Torvalds daddr = saddr + 1; 1701da177e4SLinus Torvalds 171f9242b6bSDavid S. Miller hash = nexthdr & (RAW_HTABLE_SIZE - 1); 1721da177e4SLinus Torvalds 173b673e4dfSPavel Emelyanov read_lock(&raw_v6_hashinfo.lock); 174b673e4dfSPavel Emelyanov sk = sk_head(&raw_v6_hashinfo.ht[hash]); 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds if (sk == NULL) 1771da177e4SLinus Torvalds goto out; 1781da177e4SLinus Torvalds 179c346dca1SYOSHIFUJI Hideaki net = dev_net(skb->dev); 180be185884SPavel Emelyanov sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds while (sk) { 1837be96f76SMasahide NAKAMURA int filtered; 1847be96f76SMasahide NAKAMURA 185a50feda5SEric Dumazet delivered = true; 1867be96f76SMasahide NAKAMURA switch (nexthdr) { 1877be96f76SMasahide NAKAMURA case IPPROTO_ICMPV6: 1887be96f76SMasahide NAKAMURA filtered = icmpv6_filter(sk, skb); 1897be96f76SMasahide NAKAMURA break; 19059fbb3a6SMasahide NAKAMURA 19107a93626SAmerigo Wang #if IS_ENABLED(CONFIG_IPV6_MIP6) 1927be96f76SMasahide NAKAMURA case IPPROTO_MH: 19359fbb3a6SMasahide NAKAMURA { 1947be96f76SMasahide NAKAMURA /* XXX: To validate MH only once for each packet, 1957be96f76SMasahide NAKAMURA * this is placed here. It should be after checking 1967be96f76SMasahide NAKAMURA * xfrm policy, however it doesn't. The checking xfrm 1977be96f76SMasahide NAKAMURA * policy is placed in rawv6_rcv() because it is 1987be96f76SMasahide NAKAMURA * required for each socket. 1997be96f76SMasahide NAKAMURA */ 200f2eda47dSEric Dumazet mh_filter_t *filter; 20159fbb3a6SMasahide NAKAMURA 20259fbb3a6SMasahide NAKAMURA filter = rcu_dereference(mh_filter); 203f2eda47dSEric Dumazet filtered = filter ? (*filter)(sk, skb) : 0; 2047be96f76SMasahide NAKAMURA break; 20559fbb3a6SMasahide NAKAMURA } 2067be96f76SMasahide NAKAMURA #endif 2077be96f76SMasahide NAKAMURA default: 2087be96f76SMasahide NAKAMURA filtered = 0; 2097be96f76SMasahide NAKAMURA break; 2107be96f76SMasahide NAKAMURA } 2117be96f76SMasahide NAKAMURA 2127be96f76SMasahide NAKAMURA if (filtered < 0) 2137be96f76SMasahide NAKAMURA break; 2147be96f76SMasahide NAKAMURA if (filtered == 0) { 2151da177e4SLinus Torvalds struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds /* Not releasing hash table! */ 2189fb9cbb1SYasuyuki Kozakai if (clone) { 2199fb9cbb1SYasuyuki Kozakai nf_reset(clone); 2201da177e4SLinus Torvalds rawv6_rcv(sk, clone); 2211da177e4SLinus Torvalds } 2229fb9cbb1SYasuyuki Kozakai } 223be185884SPavel Emelyanov sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr, 2242dac4b96SYOSHIFUJI Hideaki IP6CB(skb)->iif); 2251da177e4SLinus Torvalds } 2261da177e4SLinus Torvalds out: 227b673e4dfSPavel Emelyanov read_unlock(&raw_v6_hashinfo.lock); 228d13964f4SPatrick McHardy return delivered; 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds 231a50feda5SEric Dumazet bool raw6_local_deliver(struct sk_buff *skb, int nexthdr) 23269d6da0bSPavel Emelyanov { 23369d6da0bSPavel Emelyanov struct sock *raw_sk; 23469d6da0bSPavel Emelyanov 235f9242b6bSDavid S. Miller raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]); 23669d6da0bSPavel Emelyanov if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) 23769d6da0bSPavel Emelyanov raw_sk = NULL; 23869d6da0bSPavel Emelyanov 23969d6da0bSPavel Emelyanov return raw_sk != NULL; 24069d6da0bSPavel Emelyanov } 24169d6da0bSPavel Emelyanov 2421da177e4SLinus Torvalds /* This cleans up af_inet6 a bit. -DaveM */ 2431da177e4SLinus Torvalds static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) 2441da177e4SLinus Torvalds { 2451da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 2461da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 2471da177e4SLinus Torvalds struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; 248e69a4adcSAl Viro __be32 v4addr = 0; 2491da177e4SLinus Torvalds int addr_type; 2501da177e4SLinus Torvalds int err; 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133) 2531da177e4SLinus Torvalds return -EINVAL; 2541da177e4SLinus Torvalds addr_type = ipv6_addr_type(&addr->sin6_addr); 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds /* Raw sockets are IPv6 only */ 2571da177e4SLinus Torvalds if (addr_type == IPV6_ADDR_MAPPED) 258fd5c0027SEric Dumazet return -EADDRNOTAVAIL; 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds lock_sock(sk); 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds err = -EINVAL; 2631da177e4SLinus Torvalds if (sk->sk_state != TCP_CLOSE) 2641da177e4SLinus Torvalds goto out; 2651da177e4SLinus Torvalds 266fd5c0027SEric Dumazet rcu_read_lock(); 2671da177e4SLinus Torvalds /* Check if the address belongs to the host. */ 2681da177e4SLinus Torvalds if (addr_type != IPV6_ADDR_ANY) { 2691da177e4SLinus Torvalds struct net_device *dev = NULL; 2701da177e4SLinus Torvalds 271842df073SHannes Frederic Sowa if (__ipv6_addr_needs_scope_id(addr_type)) { 2721da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) && 2731da177e4SLinus Torvalds addr->sin6_scope_id) { 2741da177e4SLinus Torvalds /* Override any existing binding, if another 2751da177e4SLinus Torvalds * one is supplied by user. 2761da177e4SLinus Torvalds */ 2771da177e4SLinus Torvalds sk->sk_bound_dev_if = addr->sin6_scope_id; 2781da177e4SLinus Torvalds } 2791da177e4SLinus Torvalds 2801da177e4SLinus Torvalds /* Binding to link-local address requires an interface */ 2811da177e4SLinus Torvalds if (!sk->sk_bound_dev_if) 282fd5c0027SEric Dumazet goto out_unlock; 2831da177e4SLinus Torvalds 2841da177e4SLinus Torvalds err = -ENODEV; 285fd5c0027SEric Dumazet dev = dev_get_by_index_rcu(sock_net(sk), 286fd5c0027SEric Dumazet sk->sk_bound_dev_if); 287fd5c0027SEric Dumazet if (!dev) 288fd5c0027SEric Dumazet goto out_unlock; 2891da177e4SLinus Torvalds } 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds /* ipv4 addr of the socket is invalid. Only the 2921da177e4SLinus Torvalds * unspecified and mapped address have a v4 equivalent. 2931da177e4SLinus Torvalds */ 2941da177e4SLinus Torvalds v4addr = LOOPBACK4_IPV6; 2951da177e4SLinus Torvalds if (!(addr_type & IPV6_ADDR_MULTICAST)) { 2961da177e4SLinus Torvalds err = -EADDRNOTAVAIL; 2973b1e0a65SYOSHIFUJI Hideaki if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr, 298bfeade08SDaniel Lezcano dev, 0)) { 299fd5c0027SEric Dumazet goto out_unlock; 3001da177e4SLinus Torvalds } 3011da177e4SLinus Torvalds } 3021da177e4SLinus Torvalds } 3031da177e4SLinus Torvalds 304c720c7e8SEric Dumazet inet->inet_rcv_saddr = inet->inet_saddr = v4addr; 3054e3fd7a0SAlexey Dobriyan np->rcv_saddr = addr->sin6_addr; 3061da177e4SLinus Torvalds if (!(addr_type & IPV6_ADDR_MULTICAST)) 3074e3fd7a0SAlexey Dobriyan np->saddr = addr->sin6_addr; 3081da177e4SLinus Torvalds err = 0; 309fd5c0027SEric Dumazet out_unlock: 310fd5c0027SEric Dumazet rcu_read_unlock(); 3111da177e4SLinus Torvalds out: 3121da177e4SLinus Torvalds release_sock(sk); 3131da177e4SLinus Torvalds return err; 3141da177e4SLinus Torvalds } 3151da177e4SLinus Torvalds 31669d6da0bSPavel Emelyanov static void rawv6_err(struct sock *sk, struct sk_buff *skb, 3171da177e4SLinus Torvalds struct inet6_skb_parm *opt, 318d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info) 3191da177e4SLinus Torvalds { 3201da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 3211da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 3221da177e4SLinus Torvalds int err; 3231da177e4SLinus Torvalds int harderr; 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds /* Report error on raw socket, if: 3261da177e4SLinus Torvalds 1. User requested recverr. 3271da177e4SLinus Torvalds 2. Socket is connected (otherwise the error indication 3281da177e4SLinus Torvalds is useless without recverr and error is hard. 3291da177e4SLinus Torvalds */ 3301da177e4SLinus Torvalds if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) 3311da177e4SLinus Torvalds return; 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds harderr = icmpv6_err_convert(type, code, &err); 33481aded24SDavid S. Miller if (type == ICMPV6_PKT_TOOBIG) { 33581aded24SDavid S. Miller ip6_sk_update_pmtu(skb, sk, info); 3361da177e4SLinus Torvalds harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); 33781aded24SDavid S. Miller } 3388d65b119SDuan Jiong if (type == NDISC_REDIRECT) { 339ec18d9a2SDavid S. Miller ip6_sk_redirect(skb, sk); 3408d65b119SDuan Jiong return; 3418d65b119SDuan Jiong } 3421da177e4SLinus Torvalds if (np->recverr) { 3431da177e4SLinus Torvalds u8 *payload = skb->data; 3441da177e4SLinus Torvalds if (!inet->hdrincl) 3451da177e4SLinus Torvalds payload += offset; 3461da177e4SLinus Torvalds ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); 3471da177e4SLinus Torvalds } 3481da177e4SLinus Torvalds 3491da177e4SLinus Torvalds if (np->recverr || harderr) { 3501da177e4SLinus Torvalds sk->sk_err = err; 3511da177e4SLinus Torvalds sk->sk_error_report(sk); 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds 35569d6da0bSPavel Emelyanov void raw6_icmp_error(struct sk_buff *skb, int nexthdr, 356d5fdd6baSBrian Haley u8 type, u8 code, int inner_offset, __be32 info) 35769d6da0bSPavel Emelyanov { 35869d6da0bSPavel Emelyanov struct sock *sk; 35969d6da0bSPavel Emelyanov int hash; 360b71d1d42SEric Dumazet const struct in6_addr *saddr, *daddr; 361be185884SPavel Emelyanov struct net *net; 36269d6da0bSPavel Emelyanov 363b673e4dfSPavel Emelyanov hash = nexthdr & (RAW_HTABLE_SIZE - 1); 36469d6da0bSPavel Emelyanov 365b673e4dfSPavel Emelyanov read_lock(&raw_v6_hashinfo.lock); 366b673e4dfSPavel Emelyanov sk = sk_head(&raw_v6_hashinfo.ht[hash]); 36769d6da0bSPavel Emelyanov if (sk != NULL) { 36805f175cdSYOSHIFUJI Hideaki /* Note: ipv6_hdr(skb) != skb->data */ 369b71d1d42SEric Dumazet const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data; 37005f175cdSYOSHIFUJI Hideaki saddr = &ip6h->saddr; 37105f175cdSYOSHIFUJI Hideaki daddr = &ip6h->daddr; 372c346dca1SYOSHIFUJI Hideaki net = dev_net(skb->dev); 37369d6da0bSPavel Emelyanov 374be185884SPavel Emelyanov while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr, 37569d6da0bSPavel Emelyanov IP6CB(skb)->iif))) { 37669d6da0bSPavel Emelyanov rawv6_err(sk, skb, NULL, type, code, 37769d6da0bSPavel Emelyanov inner_offset, info); 37869d6da0bSPavel Emelyanov sk = sk_next(sk); 37969d6da0bSPavel Emelyanov } 38069d6da0bSPavel Emelyanov } 381b673e4dfSPavel Emelyanov read_unlock(&raw_v6_hashinfo.lock); 38269d6da0bSPavel Emelyanov } 38369d6da0bSPavel Emelyanov 3841da177e4SLinus Torvalds static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb) 3851da177e4SLinus Torvalds { 38633d480ceSEric Dumazet if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) && 387fb286bb2SHerbert Xu skb_checksum_complete(skb)) { 388a92aa318SWang Chen atomic_inc(&sk->sk_drops); 3891da177e4SLinus Torvalds kfree_skb(skb); 3903cc76caaSYang Hongyang return NET_RX_DROP; 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds /* Charge it to the socket. */ 394d826eb14SEric Dumazet skb_dst_drop(skb); 395d826eb14SEric Dumazet if (sock_queue_rcv_skb(sk, skb) < 0) { 3961da177e4SLinus Torvalds kfree_skb(skb); 3973cc76caaSYang Hongyang return NET_RX_DROP; 3981da177e4SLinus Torvalds } 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds return 0; 4011da177e4SLinus Torvalds } 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds /* 4041da177e4SLinus Torvalds * This is next to useless... 4051da177e4SLinus Torvalds * if we demultiplex in network layer we don't need the extra call 4061da177e4SLinus Torvalds * just to queue the skb... 4071da177e4SLinus Torvalds * maybe we could have the network decide upon a hint if it 4081da177e4SLinus Torvalds * should call raw_rcv for demultiplexing 4091da177e4SLinus Torvalds */ 4101da177e4SLinus Torvalds int rawv6_rcv(struct sock *sk, struct sk_buff *skb) 4111da177e4SLinus Torvalds { 4121da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 4131da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 4141da177e4SLinus Torvalds 4151da177e4SLinus Torvalds if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { 416a92aa318SWang Chen atomic_inc(&sk->sk_drops); 4171da177e4SLinus Torvalds kfree_skb(skb); 4181da177e4SLinus Torvalds return NET_RX_DROP; 4191da177e4SLinus Torvalds } 4201da177e4SLinus Torvalds 4211da177e4SLinus Torvalds if (!rp->checksum) 4221da177e4SLinus Torvalds skb->ip_summed = CHECKSUM_UNNECESSARY; 4231da177e4SLinus Torvalds 42484fa7933SPatrick McHardy if (skb->ip_summed == CHECKSUM_COMPLETE) { 425d56f90a7SArnaldo Carvalho de Melo skb_postpull_rcsum(skb, skb_network_header(skb), 426cfe1fc77SArnaldo Carvalho de Melo skb_network_header_len(skb)); 4270660e03fSArnaldo Carvalho de Melo if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 4280660e03fSArnaldo Carvalho de Melo &ipv6_hdr(skb)->daddr, 429c720c7e8SEric Dumazet skb->len, inet->inet_num, skb->csum)) 430fb286bb2SHerbert Xu skb->ip_summed = CHECKSUM_UNNECESSARY; 4311da177e4SLinus Torvalds } 43260476372SHerbert Xu if (!skb_csum_unnecessary(skb)) 4330660e03fSArnaldo Carvalho de Melo skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 4340660e03fSArnaldo Carvalho de Melo &ipv6_hdr(skb)->daddr, 4350660e03fSArnaldo Carvalho de Melo skb->len, 436c720c7e8SEric Dumazet inet->inet_num, 0)); 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds if (inet->hdrincl) { 439fb286bb2SHerbert Xu if (skb_checksum_complete(skb)) { 440a92aa318SWang Chen atomic_inc(&sk->sk_drops); 4411da177e4SLinus Torvalds kfree_skb(skb); 4423cc76caaSYang Hongyang return NET_RX_DROP; 4431da177e4SLinus Torvalds } 4441da177e4SLinus Torvalds } 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds rawv6_rcv_skb(sk, skb); 4471da177e4SLinus Torvalds return 0; 4481da177e4SLinus Torvalds } 4491da177e4SLinus Torvalds 4501da177e4SLinus Torvalds 4511da177e4SLinus Torvalds /* 4521da177e4SLinus Torvalds * This should be easy, if there is something there 4531da177e4SLinus Torvalds * we return it, otherwise we block. 4541da177e4SLinus Torvalds */ 4551da177e4SLinus Torvalds 4561da177e4SLinus Torvalds static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, 4571da177e4SLinus Torvalds struct msghdr *msg, size_t len, 4581da177e4SLinus Torvalds int noblock, int flags, int *addr_len) 4591da177e4SLinus Torvalds { 4601da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 4611da177e4SLinus Torvalds struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; 4621da177e4SLinus Torvalds struct sk_buff *skb; 4631da177e4SLinus Torvalds size_t copied; 4641da177e4SLinus Torvalds int err; 4651da177e4SLinus Torvalds 4661da177e4SLinus Torvalds if (flags & MSG_OOB) 4671da177e4SLinus Torvalds return -EOPNOTSUPP; 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds if (addr_len) 4701da177e4SLinus Torvalds *addr_len=sizeof(*sin6); 4711da177e4SLinus Torvalds 4721da177e4SLinus Torvalds if (flags & MSG_ERRQUEUE) 4731da177e4SLinus Torvalds return ipv6_recv_error(sk, msg, len); 4741da177e4SLinus Torvalds 4754b340ae2SBrian Haley if (np->rxpmtu && np->rxopt.bits.rxpmtu) 4764b340ae2SBrian Haley return ipv6_recv_rxpmtu(sk, msg, len); 4774b340ae2SBrian Haley 4781da177e4SLinus Torvalds skb = skb_recv_datagram(sk, flags, noblock, &err); 4791da177e4SLinus Torvalds if (!skb) 4801da177e4SLinus Torvalds goto out; 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds copied = skb->len; 4831da177e4SLinus Torvalds if (copied > len) { 4841da177e4SLinus Torvalds copied = len; 4851da177e4SLinus Torvalds msg->msg_flags |= MSG_TRUNC; 4861da177e4SLinus Torvalds } 4871da177e4SLinus Torvalds 48860476372SHerbert Xu if (skb_csum_unnecessary(skb)) { 4891da177e4SLinus Torvalds err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 4901da177e4SLinus Torvalds } else if (msg->msg_flags&MSG_TRUNC) { 491fb286bb2SHerbert Xu if (__skb_checksum_complete(skb)) 4921da177e4SLinus Torvalds goto csum_copy_err; 4931da177e4SLinus Torvalds err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 4941da177e4SLinus Torvalds } else { 4951da177e4SLinus Torvalds err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); 4961da177e4SLinus Torvalds if (err == -EINVAL) 4971da177e4SLinus Torvalds goto csum_copy_err; 4981da177e4SLinus Torvalds } 4991da177e4SLinus Torvalds if (err) 5001da177e4SLinus Torvalds goto out_free; 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds /* Copy the address. */ 5031da177e4SLinus Torvalds if (sin6) { 5041da177e4SLinus Torvalds sin6->sin6_family = AF_INET6; 505f59fc7f3STetsuo Handa sin6->sin6_port = 0; 5064e3fd7a0SAlexey Dobriyan sin6->sin6_addr = ipv6_hdr(skb)->saddr; 5071da177e4SLinus Torvalds sin6->sin6_flowinfo = 0; 508842df073SHannes Frederic Sowa sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr, 509842df073SHannes Frederic Sowa IP6CB(skb)->iif); 5101da177e4SLinus Torvalds } 5111da177e4SLinus Torvalds 5123b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 5131da177e4SLinus Torvalds 5141da177e4SLinus Torvalds if (np->rxopt.all) 51573df66f8STom Parkin ip6_datagram_recv_ctl(sk, msg, skb); 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds err = copied; 5181da177e4SLinus Torvalds if (flags & MSG_TRUNC) 5191da177e4SLinus Torvalds err = skb->len; 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds out_free: 5221da177e4SLinus Torvalds skb_free_datagram(sk, skb); 5231da177e4SLinus Torvalds out: 5241da177e4SLinus Torvalds return err; 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds csum_copy_err: 5273305b80cSHerbert Xu skb_kill_datagram(sk, skb, flags); 5281da177e4SLinus Torvalds 5291da177e4SLinus Torvalds /* Error for blocking case is chosen to masquerade 5301da177e4SLinus Torvalds as some normal condition. 5311da177e4SLinus Torvalds */ 5321da177e4SLinus Torvalds err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; 5333305b80cSHerbert Xu goto out; 5341da177e4SLinus Torvalds } 5351da177e4SLinus Torvalds 5364c9483b2SDavid S. Miller static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, 537357b40a1SHerbert Xu struct raw6_sock *rp) 5381da177e4SLinus Torvalds { 5391da177e4SLinus Torvalds struct sk_buff *skb; 5401da177e4SLinus Torvalds int err = 0; 541357b40a1SHerbert Xu int offset; 542357b40a1SHerbert Xu int len; 543679a8738SHerbert Xu int total_len; 544868c86bcSAl Viro __wsum tmp_csum; 545868c86bcSAl Viro __sum16 csum; 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds if (!rp->checksum) 5481da177e4SLinus Torvalds goto send; 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvalds if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) 5511da177e4SLinus Torvalds goto out; 5521da177e4SLinus Torvalds 553357b40a1SHerbert Xu offset = rp->offset; 554299b0767SSteffen Klassert total_len = inet_sk(sk)->cork.base.length; 555679a8738SHerbert Xu if (offset >= total_len - 1) { 5561da177e4SLinus Torvalds err = -EINVAL; 557357b40a1SHerbert Xu ip6_flush_pending_frames(sk); 5581da177e4SLinus Torvalds goto out; 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds 5611da177e4SLinus Torvalds /* should be check HW csum miyazawa */ 5621da177e4SLinus Torvalds if (skb_queue_len(&sk->sk_write_queue) == 1) { 5631da177e4SLinus Torvalds /* 5641da177e4SLinus Torvalds * Only one fragment on the socket. 5651da177e4SLinus Torvalds */ 5661da177e4SLinus Torvalds tmp_csum = skb->csum; 5671da177e4SLinus Torvalds } else { 568357b40a1SHerbert Xu struct sk_buff *csum_skb = NULL; 5691da177e4SLinus Torvalds tmp_csum = 0; 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds skb_queue_walk(&sk->sk_write_queue, skb) { 5721da177e4SLinus Torvalds tmp_csum = csum_add(tmp_csum, skb->csum); 573357b40a1SHerbert Xu 574357b40a1SHerbert Xu if (csum_skb) 575357b40a1SHerbert Xu continue; 576357b40a1SHerbert Xu 577ea2ae17dSArnaldo Carvalho de Melo len = skb->len - skb_transport_offset(skb); 578357b40a1SHerbert Xu if (offset >= len) { 579357b40a1SHerbert Xu offset -= len; 580357b40a1SHerbert Xu continue; 5811da177e4SLinus Torvalds } 582357b40a1SHerbert Xu 583357b40a1SHerbert Xu csum_skb = skb; 5841da177e4SLinus Torvalds } 5851da177e4SLinus Torvalds 586357b40a1SHerbert Xu skb = csum_skb; 587357b40a1SHerbert Xu } 588357b40a1SHerbert Xu 589ea2ae17dSArnaldo Carvalho de Melo offset += skb_transport_offset(skb); 590357b40a1SHerbert Xu if (skb_copy_bits(skb, offset, &csum, 2)) 591357b40a1SHerbert Xu BUG(); 592357b40a1SHerbert Xu 5931da177e4SLinus Torvalds /* in case cksum was not initialized */ 594357b40a1SHerbert Xu if (unlikely(csum)) 5955f92a738SAl Viro tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); 5961da177e4SLinus Torvalds 5974c9483b2SDavid S. Miller csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, 5984c9483b2SDavid S. Miller total_len, fl6->flowi6_proto, tmp_csum); 5991da177e4SLinus Torvalds 6004c9483b2SDavid S. Miller if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP) 601f6ab0288SAl Viro csum = CSUM_MANGLED_0; 602357b40a1SHerbert Xu 603357b40a1SHerbert Xu if (skb_store_bits(skb, offset, &csum, 2)) 604357b40a1SHerbert Xu BUG(); 605357b40a1SHerbert Xu 6061da177e4SLinus Torvalds send: 6071da177e4SLinus Torvalds err = ip6_push_pending_frames(sk); 6081da177e4SLinus Torvalds out: 6091da177e4SLinus Torvalds return err; 6101da177e4SLinus Torvalds } 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, 6134c9483b2SDavid S. Miller struct flowi6 *fl6, struct dst_entry **dstp, 6141da177e4SLinus Torvalds unsigned int flags) 6151da177e4SLinus Torvalds { 6163320da89SHerbert Xu struct ipv6_pinfo *np = inet6_sk(sk); 6171da177e4SLinus Torvalds struct ipv6hdr *iph; 6181da177e4SLinus Torvalds struct sk_buff *skb; 6191da177e4SLinus Torvalds int err; 6201789a640SEric Dumazet struct rt6_info *rt = (struct rt6_info *)*dstp; 621a7ae1992SHerbert Xu int hlen = LL_RESERVED_SPACE(rt->dst.dev); 622a7ae1992SHerbert Xu int tlen = rt->dst.dev->needed_tailroom; 6231da177e4SLinus Torvalds 624d8d1f30bSChangli Gao if (length > rt->dst.dev->mtu) { 6254c9483b2SDavid S. Miller ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu); 6261da177e4SLinus Torvalds return -EMSGSIZE; 6271da177e4SLinus Torvalds } 6281da177e4SLinus Torvalds if (flags&MSG_PROBE) 6291da177e4SLinus Torvalds goto out; 6301da177e4SLinus Torvalds 631f5184d26SJohannes Berg skb = sock_alloc_send_skb(sk, 632a7ae1992SHerbert Xu length + hlen + tlen + 15, 6331da177e4SLinus Torvalds flags & MSG_DONTWAIT, &err); 6341da177e4SLinus Torvalds if (skb == NULL) 6351da177e4SLinus Torvalds goto error; 636a7ae1992SHerbert Xu skb_reserve(skb, hlen); 6371da177e4SLinus Torvalds 6389c9c9ad5SHannes Frederic Sowa skb->protocol = htons(ETH_P_IPV6); 6391da177e4SLinus Torvalds skb->priority = sk->sk_priority; 6404a19ec58SLaszlo Attila Toth skb->mark = sk->sk_mark; 641d8d1f30bSChangli Gao skb_dst_set(skb, &rt->dst); 6421789a640SEric Dumazet *dstp = NULL; 6431da177e4SLinus Torvalds 6441ced98e8SArnaldo Carvalho de Melo skb_put(skb, length); 6451ced98e8SArnaldo Carvalho de Melo skb_reset_network_header(skb); 6460660e03fSArnaldo Carvalho de Melo iph = ipv6_hdr(skb); 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds skb->ip_summed = CHECKSUM_NONE; 6491da177e4SLinus Torvalds 650b0e380b1SArnaldo Carvalho de Melo skb->transport_header = skb->network_header; 6511da177e4SLinus Torvalds err = memcpy_fromiovecend((void *)iph, from, 0, length); 6521da177e4SLinus Torvalds if (err) 6531da177e4SLinus Torvalds goto error_fault; 6541da177e4SLinus Torvalds 655edf391ffSNeil Horman IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len); 656b2e0b385SJan Engelhardt err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, 657d8d1f30bSChangli Gao rt->dst.dev, dst_output); 6581da177e4SLinus Torvalds if (err > 0) 6596ce9e7b5SEric Dumazet err = net_xmit_errno(err); 6601da177e4SLinus Torvalds if (err) 6611da177e4SLinus Torvalds goto error; 6621da177e4SLinus Torvalds out: 6631da177e4SLinus Torvalds return 0; 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds error_fault: 6661da177e4SLinus Torvalds err = -EFAULT; 6671da177e4SLinus Torvalds kfree_skb(skb); 6681da177e4SLinus Torvalds error: 6693bd653c8SDenis V. Lunev IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); 6706ce9e7b5SEric Dumazet if (err == -ENOBUFS && !np->recverr) 6716ce9e7b5SEric Dumazet err = 0; 6721da177e4SLinus Torvalds return err; 6731da177e4SLinus Torvalds } 6741da177e4SLinus Torvalds 6754c9483b2SDavid S. Miller static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg) 6761da177e4SLinus Torvalds { 6771da177e4SLinus Torvalds struct iovec *iov; 6781da177e4SLinus Torvalds u8 __user *type = NULL; 6791da177e4SLinus Torvalds u8 __user *code = NULL; 6806e8f4d48SMasahide NAKAMURA u8 len = 0; 6811da177e4SLinus Torvalds int probed = 0; 6821da177e4SLinus Torvalds int i; 6831da177e4SLinus Torvalds 6841da177e4SLinus Torvalds if (!msg->msg_iov) 685a27b58feSHeiko Carstens return 0; 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds for (i = 0; i < msg->msg_iovlen; i++) { 6881da177e4SLinus Torvalds iov = &msg->msg_iov[i]; 6891da177e4SLinus Torvalds if (!iov) 6901da177e4SLinus Torvalds continue; 6911da177e4SLinus Torvalds 6924c9483b2SDavid S. Miller switch (fl6->flowi6_proto) { 6931da177e4SLinus Torvalds case IPPROTO_ICMPV6: 6941da177e4SLinus Torvalds /* check if one-byte field is readable or not. */ 6951da177e4SLinus Torvalds if (iov->iov_base && iov->iov_len < 1) 6961da177e4SLinus Torvalds break; 6971da177e4SLinus Torvalds 6981da177e4SLinus Torvalds if (!type) { 6991da177e4SLinus Torvalds type = iov->iov_base; 7001da177e4SLinus Torvalds /* check if code field is readable or not. */ 7011da177e4SLinus Torvalds if (iov->iov_len > 1) 7021da177e4SLinus Torvalds code = type + 1; 7031da177e4SLinus Torvalds } else if (!code) 7041da177e4SLinus Torvalds code = iov->iov_base; 7051da177e4SLinus Torvalds 7061da177e4SLinus Torvalds if (type && code) { 7071958b856SDavid S. Miller if (get_user(fl6->fl6_icmp_type, type) || 7081958b856SDavid S. Miller get_user(fl6->fl6_icmp_code, code)) 709a27b58feSHeiko Carstens return -EFAULT; 7101da177e4SLinus Torvalds probed = 1; 7111da177e4SLinus Torvalds } 7121da177e4SLinus Torvalds break; 7136e8f4d48SMasahide NAKAMURA case IPPROTO_MH: 7146e8f4d48SMasahide NAKAMURA if (iov->iov_base && iov->iov_len < 1) 7156e8f4d48SMasahide NAKAMURA break; 7166e8f4d48SMasahide NAKAMURA /* check if type field is readable or not. */ 7176e8f4d48SMasahide NAKAMURA if (iov->iov_len > 2 - len) { 7186e8f4d48SMasahide NAKAMURA u8 __user *p = iov->iov_base; 7191958b856SDavid S. Miller if (get_user(fl6->fl6_mh_type, &p[2 - len])) 720a27b58feSHeiko Carstens return -EFAULT; 7216e8f4d48SMasahide NAKAMURA probed = 1; 7226e8f4d48SMasahide NAKAMURA } else 7236e8f4d48SMasahide NAKAMURA len += iov->iov_len; 7246e8f4d48SMasahide NAKAMURA 7256e8f4d48SMasahide NAKAMURA break; 7261da177e4SLinus Torvalds default: 7271da177e4SLinus Torvalds probed = 1; 7281da177e4SLinus Torvalds break; 7291da177e4SLinus Torvalds } 7301da177e4SLinus Torvalds if (probed) 7311da177e4SLinus Torvalds break; 7321da177e4SLinus Torvalds } 733a27b58feSHeiko Carstens return 0; 7341da177e4SLinus Torvalds } 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, 7371da177e4SLinus Torvalds struct msghdr *msg, size_t len) 7381da177e4SLinus Torvalds { 7391da177e4SLinus Torvalds struct ipv6_txoptions opt_space; 7401da177e4SLinus Torvalds struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; 74120c59de2SArnaud Ebalard struct in6_addr *daddr, *final_p, final; 7421da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 7431da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 7441da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 7451da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL; 7461da177e4SLinus Torvalds struct ip6_flowlabel *flowlabel = NULL; 7471da177e4SLinus Torvalds struct dst_entry *dst = NULL; 7484c9483b2SDavid S. Miller struct flowi6 fl6; 7491da177e4SLinus Torvalds int addr_len = msg->msg_namelen; 7501da177e4SLinus Torvalds int hlimit = -1; 75141a1f8eaSYOSHIFUJI Hideaki int tclass = -1; 75213b52cd4SBrian Haley int dontfrag = -1; 7531da177e4SLinus Torvalds u16 proto; 7541da177e4SLinus Torvalds int err; 7551da177e4SLinus Torvalds 7561da177e4SLinus Torvalds /* Rough check on arithmetic overflow, 757b59e139bSYOSHIFUJI Hideaki better check is made in ip6_append_data(). 7581da177e4SLinus Torvalds */ 759b59e139bSYOSHIFUJI Hideaki if (len > INT_MAX) 7601da177e4SLinus Torvalds return -EMSGSIZE; 7611da177e4SLinus Torvalds 7621da177e4SLinus Torvalds /* Mirror BSD error message compatibility */ 7631da177e4SLinus Torvalds if (msg->msg_flags & MSG_OOB) 7641da177e4SLinus Torvalds return -EOPNOTSUPP; 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvalds /* 7671da177e4SLinus Torvalds * Get and verify the address. 7681da177e4SLinus Torvalds */ 7694c9483b2SDavid S. Miller memset(&fl6, 0, sizeof(fl6)); 7701da177e4SLinus Torvalds 7714c9483b2SDavid S. Miller fl6.flowi6_mark = sk->sk_mark; 7724a19ec58SLaszlo Attila Toth 7731da177e4SLinus Torvalds if (sin6) { 7741da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133) 7751da177e4SLinus Torvalds return -EINVAL; 7761da177e4SLinus Torvalds 7771da177e4SLinus Torvalds if (sin6->sin6_family && sin6->sin6_family != AF_INET6) 778a02cec21SEric Dumazet return -EAFNOSUPPORT; 7791da177e4SLinus Torvalds 7801da177e4SLinus Torvalds /* port is the proto value [0..255] carried in nexthdr */ 7811da177e4SLinus Torvalds proto = ntohs(sin6->sin6_port); 7821da177e4SLinus Torvalds 7831da177e4SLinus Torvalds if (!proto) 784c720c7e8SEric Dumazet proto = inet->inet_num; 785c720c7e8SEric Dumazet else if (proto != inet->inet_num) 786a02cec21SEric Dumazet return -EINVAL; 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds if (proto > 255) 789a02cec21SEric Dumazet return -EINVAL; 7901da177e4SLinus Torvalds 7911da177e4SLinus Torvalds daddr = &sin6->sin6_addr; 7921da177e4SLinus Torvalds if (np->sndflow) { 7934c9483b2SDavid S. Miller fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 7944c9483b2SDavid S. Miller if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { 7954c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 7961da177e4SLinus Torvalds if (flowlabel == NULL) 7971da177e4SLinus Torvalds return -EINVAL; 7981da177e4SLinus Torvalds daddr = &flowlabel->dst; 7991da177e4SLinus Torvalds } 8001da177e4SLinus Torvalds } 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvalds /* 8031da177e4SLinus Torvalds * Otherwise it will be difficult to maintain 8041da177e4SLinus Torvalds * sk->sk_dst_cache. 8051da177e4SLinus Torvalds */ 8061da177e4SLinus Torvalds if (sk->sk_state == TCP_ESTABLISHED && 8071da177e4SLinus Torvalds ipv6_addr_equal(daddr, &np->daddr)) 8081da177e4SLinus Torvalds daddr = &np->daddr; 8091da177e4SLinus Torvalds 8101da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) && 8111da177e4SLinus Torvalds sin6->sin6_scope_id && 812842df073SHannes Frederic Sowa __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) 8134c9483b2SDavid S. Miller fl6.flowi6_oif = sin6->sin6_scope_id; 8141da177e4SLinus Torvalds } else { 8151da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 8161da177e4SLinus Torvalds return -EDESTADDRREQ; 8171da177e4SLinus Torvalds 818c720c7e8SEric Dumazet proto = inet->inet_num; 8191da177e4SLinus Torvalds daddr = &np->daddr; 8204c9483b2SDavid S. Miller fl6.flowlabel = np->flow_label; 8211da177e4SLinus Torvalds } 8221da177e4SLinus Torvalds 8234c9483b2SDavid S. Miller if (fl6.flowi6_oif == 0) 8244c9483b2SDavid S. Miller fl6.flowi6_oif = sk->sk_bound_dev_if; 8251da177e4SLinus Torvalds 8261da177e4SLinus Torvalds if (msg->msg_controllen) { 8271da177e4SLinus Torvalds opt = &opt_space; 8281da177e4SLinus Torvalds memset(opt, 0, sizeof(struct ipv6_txoptions)); 8291da177e4SLinus Torvalds opt->tot_len = sizeof(struct ipv6_txoptions); 8301da177e4SLinus Torvalds 83173df66f8STom Parkin err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, 832ec0506dbSMaciej Żenczykowski &hlimit, &tclass, &dontfrag); 8331da177e4SLinus Torvalds if (err < 0) { 8341da177e4SLinus Torvalds fl6_sock_release(flowlabel); 8351da177e4SLinus Torvalds return err; 8361da177e4SLinus Torvalds } 8374c9483b2SDavid S. Miller if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 8384c9483b2SDavid S. Miller flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); 8391da177e4SLinus Torvalds if (flowlabel == NULL) 8401da177e4SLinus Torvalds return -EINVAL; 8411da177e4SLinus Torvalds } 8421da177e4SLinus Torvalds if (!(opt->opt_nflen|opt->opt_flen)) 8431da177e4SLinus Torvalds opt = NULL; 8441da177e4SLinus Torvalds } 8451da177e4SLinus Torvalds if (opt == NULL) 8461da177e4SLinus Torvalds opt = np->opt; 847df9890c3SYOSHIFUJI Hideaki if (flowlabel) 8481da177e4SLinus Torvalds opt = fl6_merge_options(&opt_space, flowlabel, opt); 849df9890c3SYOSHIFUJI Hideaki opt = ipv6_fixup_options(&opt_space, opt); 8501da177e4SLinus Torvalds 8514c9483b2SDavid S. Miller fl6.flowi6_proto = proto; 8524c9483b2SDavid S. Miller err = rawv6_probe_proto_opt(&fl6, msg); 853a27b58feSHeiko Carstens if (err) 854a27b58feSHeiko Carstens goto out; 8551da177e4SLinus Torvalds 856876c7f41SBrian Haley if (!ipv6_addr_any(daddr)) 8574e3fd7a0SAlexey Dobriyan fl6.daddr = *daddr; 858876c7f41SBrian Haley else 8594c9483b2SDavid S. Miller fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ 8604c9483b2SDavid S. Miller if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) 8614e3fd7a0SAlexey Dobriyan fl6.saddr = np->saddr; 8621da177e4SLinus Torvalds 8634c9483b2SDavid S. Miller final_p = fl6_update_dst(&fl6, opt, &final); 8641da177e4SLinus Torvalds 8654c9483b2SDavid S. Miller if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) 8664c9483b2SDavid S. Miller fl6.flowi6_oif = np->mcast_oif; 867c4062dfcSErich E. Hoover else if (!fl6.flowi6_oif) 868c4062dfcSErich E. Hoover fl6.flowi6_oif = np->ucast_oif; 8694c9483b2SDavid S. Miller security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); 8701da177e4SLinus Torvalds 8714c9483b2SDavid S. Miller dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true); 87268d0c6d3SDavid S. Miller if (IS_ERR(dst)) { 87368d0c6d3SDavid S. Miller err = PTR_ERR(dst); 8741da177e4SLinus Torvalds goto out; 87514e50e57SDavid S. Miller } 8761da177e4SLinus Torvalds if (hlimit < 0) { 8774c9483b2SDavid S. Miller if (ipv6_addr_is_multicast(&fl6.daddr)) 8781da177e4SLinus Torvalds hlimit = np->mcast_hops; 8791da177e4SLinus Torvalds else 8801da177e4SLinus Torvalds hlimit = np->hop_limit; 8811da177e4SLinus Torvalds if (hlimit < 0) 8826b75d090SYOSHIFUJI Hideaki hlimit = ip6_dst_hoplimit(dst); 8831da177e4SLinus Torvalds } 8841da177e4SLinus Torvalds 88541a1f8eaSYOSHIFUJI Hideaki if (tclass < 0) 886e651f03aSGerrit Renker tclass = np->tclass; 88741a1f8eaSYOSHIFUJI Hideaki 88813b52cd4SBrian Haley if (dontfrag < 0) 88913b52cd4SBrian Haley dontfrag = np->dontfrag; 89013b52cd4SBrian Haley 8911da177e4SLinus Torvalds if (msg->msg_flags&MSG_CONFIRM) 8921da177e4SLinus Torvalds goto do_confirm; 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds back_from_confirm: 8951789a640SEric Dumazet if (inet->hdrincl) 8964c9483b2SDavid S. Miller err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags); 8971789a640SEric Dumazet else { 8981da177e4SLinus Torvalds lock_sock(sk); 89941a1f8eaSYOSHIFUJI Hideaki err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, 9004c9483b2SDavid S. Miller len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info*)dst, 90113b52cd4SBrian Haley msg->msg_flags, dontfrag); 9021da177e4SLinus Torvalds 9031da177e4SLinus Torvalds if (err) 9041da177e4SLinus Torvalds ip6_flush_pending_frames(sk); 9051da177e4SLinus Torvalds else if (!(msg->msg_flags & MSG_MORE)) 9064c9483b2SDavid S. Miller err = rawv6_push_pending_frames(sk, &fl6, rp); 9073ef9d943SYOSHIFUJI Hideaki release_sock(sk); 9081da177e4SLinus Torvalds } 9091da177e4SLinus Torvalds done: 9106d3e85ecSNicolas DICHTEL dst_release(dst); 9111da177e4SLinus Torvalds out: 9121da177e4SLinus Torvalds fl6_sock_release(flowlabel); 9131da177e4SLinus Torvalds return err<0?err:len; 9141da177e4SLinus Torvalds do_confirm: 9151da177e4SLinus Torvalds dst_confirm(dst); 9161da177e4SLinus Torvalds if (!(msg->msg_flags & MSG_PROBE) || len) 9171da177e4SLinus Torvalds goto back_from_confirm; 9181da177e4SLinus Torvalds err = 0; 9191da177e4SLinus Torvalds goto done; 9201da177e4SLinus Torvalds } 9211da177e4SLinus Torvalds 9221da177e4SLinus Torvalds static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, 9231da177e4SLinus Torvalds char __user *optval, int optlen) 9241da177e4SLinus Torvalds { 9251da177e4SLinus Torvalds switch (optname) { 9261da177e4SLinus Torvalds case ICMPV6_FILTER: 9271da177e4SLinus Torvalds if (optlen > sizeof(struct icmp6_filter)) 9281da177e4SLinus Torvalds optlen = sizeof(struct icmp6_filter); 9291da177e4SLinus Torvalds if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) 9301da177e4SLinus Torvalds return -EFAULT; 9311da177e4SLinus Torvalds return 0; 9321da177e4SLinus Torvalds default: 9331da177e4SLinus Torvalds return -ENOPROTOOPT; 9343ff50b79SStephen Hemminger } 9351da177e4SLinus Torvalds 9361da177e4SLinus Torvalds return 0; 9371da177e4SLinus Torvalds } 9381da177e4SLinus Torvalds 9391da177e4SLinus Torvalds static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, 9401da177e4SLinus Torvalds char __user *optval, int __user *optlen) 9411da177e4SLinus Torvalds { 9421da177e4SLinus Torvalds int len; 9431da177e4SLinus Torvalds 9441da177e4SLinus Torvalds switch (optname) { 9451da177e4SLinus Torvalds case ICMPV6_FILTER: 9461da177e4SLinus Torvalds if (get_user(len, optlen)) 9471da177e4SLinus Torvalds return -EFAULT; 9481da177e4SLinus Torvalds if (len < 0) 9491da177e4SLinus Torvalds return -EINVAL; 9501da177e4SLinus Torvalds if (len > sizeof(struct icmp6_filter)) 9511da177e4SLinus Torvalds len = sizeof(struct icmp6_filter); 9521da177e4SLinus Torvalds if (put_user(len, optlen)) 9531da177e4SLinus Torvalds return -EFAULT; 9541da177e4SLinus Torvalds if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) 9551da177e4SLinus Torvalds return -EFAULT; 9561da177e4SLinus Torvalds return 0; 9571da177e4SLinus Torvalds default: 9581da177e4SLinus Torvalds return -ENOPROTOOPT; 9593ff50b79SStephen Hemminger } 9601da177e4SLinus Torvalds 9611da177e4SLinus Torvalds return 0; 9621da177e4SLinus Torvalds } 9631da177e4SLinus Torvalds 9641da177e4SLinus Torvalds 9653fdadf7dSDmitry Mishin static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, 966b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 9671da177e4SLinus Torvalds { 9681da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 9691da177e4SLinus Torvalds int val; 9701da177e4SLinus Torvalds 9711da177e4SLinus Torvalds if (get_user(val, (int __user *)optval)) 9721da177e4SLinus Torvalds return -EFAULT; 9731da177e4SLinus Torvalds 9741da177e4SLinus Torvalds switch (optname) { 9751da177e4SLinus Torvalds case IPV6_CHECKSUM: 976c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 && 9771a98d05fSYOSHIFUJI Hideaki level == IPPROTO_IPV6) { 9781a98d05fSYOSHIFUJI Hideaki /* 9791a98d05fSYOSHIFUJI Hideaki * RFC3542 tells that IPV6_CHECKSUM socket 9801a98d05fSYOSHIFUJI Hideaki * option in the IPPROTO_IPV6 level is not 9811a98d05fSYOSHIFUJI Hideaki * allowed on ICMPv6 sockets. 9821a98d05fSYOSHIFUJI Hideaki * If you want to set it, use IPPROTO_RAW 9831a98d05fSYOSHIFUJI Hideaki * level IPV6_CHECKSUM socket option 9841a98d05fSYOSHIFUJI Hideaki * (Linux extension). 9851a98d05fSYOSHIFUJI Hideaki */ 9861a98d05fSYOSHIFUJI Hideaki return -EINVAL; 9871a98d05fSYOSHIFUJI Hideaki } 9881a98d05fSYOSHIFUJI Hideaki 9891da177e4SLinus Torvalds /* You may get strange result with a positive odd offset; 9901da177e4SLinus Torvalds RFC2292bis agrees with me. */ 9911da177e4SLinus Torvalds if (val > 0 && (val&1)) 992a02cec21SEric Dumazet return -EINVAL; 9931da177e4SLinus Torvalds if (val < 0) { 9941da177e4SLinus Torvalds rp->checksum = 0; 9951da177e4SLinus Torvalds } else { 9961da177e4SLinus Torvalds rp->checksum = 1; 9971da177e4SLinus Torvalds rp->offset = val; 9981da177e4SLinus Torvalds } 9991da177e4SLinus Torvalds 10001da177e4SLinus Torvalds return 0; 10011da177e4SLinus Torvalds 10021da177e4SLinus Torvalds default: 1003a02cec21SEric Dumazet return -ENOPROTOOPT; 10041da177e4SLinus Torvalds } 10051da177e4SLinus Torvalds } 10061da177e4SLinus Torvalds 10073fdadf7dSDmitry Mishin static int rawv6_setsockopt(struct sock *sk, int level, int optname, 1008b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 10091da177e4SLinus Torvalds { 10101da177e4SLinus Torvalds switch (level) { 10111da177e4SLinus Torvalds case SOL_RAW: 10121da177e4SLinus Torvalds break; 10131da177e4SLinus Torvalds 10141da177e4SLinus Torvalds case SOL_ICMPV6: 1015c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) 10161da177e4SLinus Torvalds return -EOPNOTSUPP; 1017207ec0abSJoe Perches return rawv6_seticmpfilter(sk, level, optname, optval, optlen); 10181da177e4SLinus Torvalds case SOL_IPV6: 10191da177e4SLinus Torvalds if (optname == IPV6_CHECKSUM) 10201da177e4SLinus Torvalds break; 10211da177e4SLinus Torvalds default: 1022207ec0abSJoe Perches return ipv6_setsockopt(sk, level, optname, optval, optlen); 10233ff50b79SStephen Hemminger } 10243ff50b79SStephen Hemminger 10253fdadf7dSDmitry Mishin return do_rawv6_setsockopt(sk, level, optname, optval, optlen); 10263fdadf7dSDmitry Mishin } 10273fdadf7dSDmitry Mishin 10283fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 10293fdadf7dSDmitry Mishin static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, 1030b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 10313fdadf7dSDmitry Mishin { 10323fdadf7dSDmitry Mishin switch (level) { 10333fdadf7dSDmitry Mishin case SOL_RAW: 10343fdadf7dSDmitry Mishin break; 10353fdadf7dSDmitry Mishin case SOL_ICMPV6: 1036c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) 10373fdadf7dSDmitry Mishin return -EOPNOTSUPP; 1038543d9cfeSArnaldo Carvalho de Melo return rawv6_seticmpfilter(sk, level, optname, optval, optlen); 10393fdadf7dSDmitry Mishin case SOL_IPV6: 10403fdadf7dSDmitry Mishin if (optname == IPV6_CHECKSUM) 10413fdadf7dSDmitry Mishin break; 10423fdadf7dSDmitry Mishin default: 1043543d9cfeSArnaldo Carvalho de Melo return compat_ipv6_setsockopt(sk, level, optname, 1044543d9cfeSArnaldo Carvalho de Melo optval, optlen); 10453ff50b79SStephen Hemminger } 10463fdadf7dSDmitry Mishin return do_rawv6_setsockopt(sk, level, optname, optval, optlen); 10473fdadf7dSDmitry Mishin } 10483fdadf7dSDmitry Mishin #endif 10493fdadf7dSDmitry Mishin 10503fdadf7dSDmitry Mishin static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, 10513fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 10523fdadf7dSDmitry Mishin { 10533fdadf7dSDmitry Mishin struct raw6_sock *rp = raw6_sk(sk); 10543fdadf7dSDmitry Mishin int val, len; 10551da177e4SLinus Torvalds 10561da177e4SLinus Torvalds if (get_user(len,optlen)) 10571da177e4SLinus Torvalds return -EFAULT; 10581da177e4SLinus Torvalds 10591da177e4SLinus Torvalds switch (optname) { 10601da177e4SLinus Torvalds case IPV6_CHECKSUM: 10611a98d05fSYOSHIFUJI Hideaki /* 10621a98d05fSYOSHIFUJI Hideaki * We allow getsockopt() for IPPROTO_IPV6-level 10631a98d05fSYOSHIFUJI Hideaki * IPV6_CHECKSUM socket option on ICMPv6 sockets 10641a98d05fSYOSHIFUJI Hideaki * since RFC3542 is silent about it. 10651a98d05fSYOSHIFUJI Hideaki */ 10661da177e4SLinus Torvalds if (rp->checksum == 0) 10671da177e4SLinus Torvalds val = -1; 10681da177e4SLinus Torvalds else 10691da177e4SLinus Torvalds val = rp->offset; 10701da177e4SLinus Torvalds break; 10711da177e4SLinus Torvalds 10721da177e4SLinus Torvalds default: 10731da177e4SLinus Torvalds return -ENOPROTOOPT; 10741da177e4SLinus Torvalds } 10751da177e4SLinus Torvalds 10761da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len); 10771da177e4SLinus Torvalds 10781da177e4SLinus Torvalds if (put_user(len, optlen)) 10791da177e4SLinus Torvalds return -EFAULT; 10801da177e4SLinus Torvalds if (copy_to_user(optval,&val,len)) 10811da177e4SLinus Torvalds return -EFAULT; 10821da177e4SLinus Torvalds return 0; 10831da177e4SLinus Torvalds } 10841da177e4SLinus Torvalds 10853fdadf7dSDmitry Mishin static int rawv6_getsockopt(struct sock *sk, int level, int optname, 10863fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 10873fdadf7dSDmitry Mishin { 10883fdadf7dSDmitry Mishin switch (level) { 10893fdadf7dSDmitry Mishin case SOL_RAW: 10903fdadf7dSDmitry Mishin break; 10913fdadf7dSDmitry Mishin 10923fdadf7dSDmitry Mishin case SOL_ICMPV6: 1093c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) 10943fdadf7dSDmitry Mishin return -EOPNOTSUPP; 1095207ec0abSJoe Perches return rawv6_geticmpfilter(sk, level, optname, optval, optlen); 10963fdadf7dSDmitry Mishin case SOL_IPV6: 10973fdadf7dSDmitry Mishin if (optname == IPV6_CHECKSUM) 10983fdadf7dSDmitry Mishin break; 10993fdadf7dSDmitry Mishin default: 1100207ec0abSJoe Perches return ipv6_getsockopt(sk, level, optname, optval, 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: 1114c720c7e8SEric Dumazet if (inet_sk(sk)->inet_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) { 1131207ec0abSJoe Perches case SIOCOUTQ: { 113231e6d363SEric Dumazet int amount = sk_wmem_alloc_get(sk); 113331e6d363SEric Dumazet 11341da177e4SLinus Torvalds return put_user(amount, (int __user *)arg); 11351da177e4SLinus Torvalds } 1136207ec0abSJoe Perches case SIOCINQ: { 11371da177e4SLinus Torvalds struct sk_buff *skb; 11381da177e4SLinus Torvalds int amount = 0; 11391da177e4SLinus Torvalds 1140e0f9f858SHerbert Xu spin_lock_bh(&sk->sk_receive_queue.lock); 11411da177e4SLinus Torvalds skb = skb_peek(&sk->sk_receive_queue); 11421da177e4SLinus Torvalds if (skb != NULL) 114329a3cad5SSimon Horman amount = skb_tail_pointer(skb) - 114429a3cad5SSimon Horman skb_transport_header(skb); 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 1158e2d57766SDavid S. Miller #ifdef CONFIG_COMPAT 1159e2d57766SDavid S. Miller static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) 1160e2d57766SDavid S. Miller { 1161e2d57766SDavid S. Miller switch (cmd) { 1162e2d57766SDavid S. Miller case SIOCOUTQ: 1163e2d57766SDavid S. Miller case SIOCINQ: 1164e2d57766SDavid S. Miller return -ENOIOCTLCMD; 1165e2d57766SDavid S. Miller default: 1166e2d57766SDavid S. Miller #ifdef CONFIG_IPV6_MROUTE 1167e2d57766SDavid S. Miller return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg)); 1168e2d57766SDavid S. Miller #else 1169e2d57766SDavid S. Miller return -ENOIOCTLCMD; 1170e2d57766SDavid S. Miller #endif 1171e2d57766SDavid S. Miller } 1172e2d57766SDavid S. Miller } 1173e2d57766SDavid S. Miller #endif 1174e2d57766SDavid S. Miller 11751da177e4SLinus Torvalds static void rawv6_close(struct sock *sk, long timeout) 11761da177e4SLinus Torvalds { 1177c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num == IPPROTO_RAW) 1178725a8ff0SDenis V. Lunev ip6_ra_control(sk, -1); 11797bc570c8SYOSHIFUJI Hideaki ip6mr_sk_done(sk); 11801da177e4SLinus Torvalds sk_common_release(sk); 11811da177e4SLinus Torvalds } 11821da177e4SLinus Torvalds 11837d06b2e0SBrian Haley static void raw6_destroy(struct sock *sk) 118422dd4850SDenis V. Lunev { 118522dd4850SDenis V. Lunev lock_sock(sk); 118622dd4850SDenis V. Lunev ip6_flush_pending_frames(sk); 118722dd4850SDenis V. Lunev release_sock(sk); 1188f23d60deSDavid S. Miller 11897d06b2e0SBrian Haley inet6_destroy_sock(sk); 119022dd4850SDenis V. Lunev } 119122dd4850SDenis V. Lunev 11921da177e4SLinus Torvalds static int rawv6_init_sk(struct sock *sk) 11931da177e4SLinus Torvalds { 11941da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 1195f48d5ff1SMasahide NAKAMURA 1196c720c7e8SEric Dumazet switch (inet_sk(sk)->inet_num) { 1197f48d5ff1SMasahide NAKAMURA case IPPROTO_ICMPV6: 11981da177e4SLinus Torvalds rp->checksum = 1; 11991da177e4SLinus Torvalds rp->offset = 2; 1200f48d5ff1SMasahide NAKAMURA break; 1201f48d5ff1SMasahide NAKAMURA case IPPROTO_MH: 1202f48d5ff1SMasahide NAKAMURA rp->checksum = 1; 1203f48d5ff1SMasahide NAKAMURA rp->offset = 4; 1204f48d5ff1SMasahide NAKAMURA break; 1205f48d5ff1SMasahide NAKAMURA default: 1206f48d5ff1SMasahide NAKAMURA break; 12071da177e4SLinus Torvalds } 1208a02cec21SEric Dumazet return 0; 12091da177e4SLinus Torvalds } 12101da177e4SLinus Torvalds 12111da177e4SLinus Torvalds struct proto rawv6_prot = { 12121da177e4SLinus Torvalds .name = "RAWv6", 12131da177e4SLinus Torvalds .owner = THIS_MODULE, 12141da177e4SLinus Torvalds .close = rawv6_close, 121522dd4850SDenis V. Lunev .destroy = raw6_destroy, 12161da177e4SLinus Torvalds .connect = ip6_datagram_connect, 12171da177e4SLinus Torvalds .disconnect = udp_disconnect, 12181da177e4SLinus Torvalds .ioctl = rawv6_ioctl, 12191da177e4SLinus Torvalds .init = rawv6_init_sk, 12201da177e4SLinus Torvalds .setsockopt = rawv6_setsockopt, 12211da177e4SLinus Torvalds .getsockopt = rawv6_getsockopt, 12221da177e4SLinus Torvalds .sendmsg = rawv6_sendmsg, 12231da177e4SLinus Torvalds .recvmsg = rawv6_recvmsg, 12241da177e4SLinus Torvalds .bind = rawv6_bind, 12251da177e4SLinus Torvalds .backlog_rcv = rawv6_rcv_skb, 1226fc8717baSPavel Emelyanov .hash = raw_hash_sk, 1227fc8717baSPavel Emelyanov .unhash = raw_unhash_sk, 12281da177e4SLinus Torvalds .obj_size = sizeof(struct raw6_sock), 1229fc8717baSPavel Emelyanov .h.raw_hash = &raw_v6_hashinfo, 1230543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 1231543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_rawv6_setsockopt, 1232543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_rawv6_getsockopt, 1233e2d57766SDavid S. Miller .compat_ioctl = compat_rawv6_ioctl, 1234543d9cfeSArnaldo Carvalho de Melo #endif 12351da177e4SLinus Torvalds }; 12361da177e4SLinus Torvalds 12371da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 12381da177e4SLinus Torvalds static int raw6_seq_show(struct seq_file *seq, void *v) 12391da177e4SLinus Torvalds { 124017ef66afSLorenzo Colitti if (v == SEQ_START_TOKEN) { 124117ef66afSLorenzo Colitti seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); 124217ef66afSLorenzo Colitti } else { 124317ef66afSLorenzo Colitti struct sock *sp = v; 124417ef66afSLorenzo Colitti __u16 srcp = inet_sk(sp)->inet_num; 124517ef66afSLorenzo Colitti ip6_dgram_sock_seq_show(seq, v, srcp, 0, 124617ef66afSLorenzo Colitti raw_seq_private(seq)->bucket); 124717ef66afSLorenzo Colitti } 12481da177e4SLinus Torvalds return 0; 12491da177e4SLinus Torvalds } 12501da177e4SLinus Torvalds 125156b3d975SPhilippe De Muyter static const struct seq_operations raw6_seq_ops = { 125242a73808SPavel Emelyanov .start = raw_seq_start, 125342a73808SPavel Emelyanov .next = raw_seq_next, 125442a73808SPavel Emelyanov .stop = raw_seq_stop, 12551da177e4SLinus Torvalds .show = raw6_seq_show, 12561da177e4SLinus Torvalds }; 12571da177e4SLinus Torvalds 12581da177e4SLinus Torvalds static int raw6_seq_open(struct inode *inode, struct file *file) 12591da177e4SLinus Torvalds { 12603046d767SDenis V. Lunev return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops); 12611da177e4SLinus Torvalds } 12621da177e4SLinus Torvalds 12639a32144eSArjan van de Ven static const struct file_operations raw6_seq_fops = { 12641da177e4SLinus Torvalds .owner = THIS_MODULE, 12651da177e4SLinus Torvalds .open = raw6_seq_open, 12661da177e4SLinus Torvalds .read = seq_read, 12671da177e4SLinus Torvalds .llseek = seq_lseek, 1268f51d599fSPavel Emelyanov .release = seq_release_net, 12691da177e4SLinus Torvalds }; 12701da177e4SLinus Torvalds 12712c8c1e72SAlexey Dobriyan static int __net_init raw6_init_net(struct net *net) 1272a308da16SPavel Emelyanov { 1273d4beaa66SGao feng if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops)) 1274a308da16SPavel Emelyanov return -ENOMEM; 1275a308da16SPavel Emelyanov 1276a308da16SPavel Emelyanov return 0; 1277a308da16SPavel Emelyanov } 1278a308da16SPavel Emelyanov 12792c8c1e72SAlexey Dobriyan static void __net_exit raw6_exit_net(struct net *net) 1280a308da16SPavel Emelyanov { 1281ece31ffdSGao feng remove_proc_entry("raw6", net->proc_net); 1282a308da16SPavel Emelyanov } 1283a308da16SPavel Emelyanov 1284a308da16SPavel Emelyanov static struct pernet_operations raw6_net_ops = { 1285a308da16SPavel Emelyanov .init = raw6_init_net, 1286a308da16SPavel Emelyanov .exit = raw6_exit_net, 1287a308da16SPavel Emelyanov }; 1288a308da16SPavel Emelyanov 12891da177e4SLinus Torvalds int __init raw6_proc_init(void) 12901da177e4SLinus Torvalds { 1291a308da16SPavel Emelyanov return register_pernet_subsys(&raw6_net_ops); 12921da177e4SLinus Torvalds } 12931da177e4SLinus Torvalds 12941da177e4SLinus Torvalds void raw6_proc_exit(void) 12951da177e4SLinus Torvalds { 1296a308da16SPavel Emelyanov unregister_pernet_subsys(&raw6_net_ops); 12971da177e4SLinus Torvalds } 12981da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */ 12997f4e4868SDaniel Lezcano 13007f4e4868SDaniel Lezcano /* Same as inet6_dgram_ops, sans udp_poll. */ 13017f4e4868SDaniel Lezcano static const struct proto_ops inet6_sockraw_ops = { 13027f4e4868SDaniel Lezcano .family = PF_INET6, 13037f4e4868SDaniel Lezcano .owner = THIS_MODULE, 13047f4e4868SDaniel Lezcano .release = inet6_release, 13057f4e4868SDaniel Lezcano .bind = inet6_bind, 13067f4e4868SDaniel Lezcano .connect = inet_dgram_connect, /* ok */ 13077f4e4868SDaniel Lezcano .socketpair = sock_no_socketpair, /* a do nothing */ 13087f4e4868SDaniel Lezcano .accept = sock_no_accept, /* a do nothing */ 13097f4e4868SDaniel Lezcano .getname = inet6_getname, 13107f4e4868SDaniel Lezcano .poll = datagram_poll, /* ok */ 13117f4e4868SDaniel Lezcano .ioctl = inet6_ioctl, /* must change */ 13127f4e4868SDaniel Lezcano .listen = sock_no_listen, /* ok */ 13137f4e4868SDaniel Lezcano .shutdown = inet_shutdown, /* ok */ 13147f4e4868SDaniel Lezcano .setsockopt = sock_common_setsockopt, /* ok */ 13157f4e4868SDaniel Lezcano .getsockopt = sock_common_getsockopt, /* ok */ 13167f4e4868SDaniel Lezcano .sendmsg = inet_sendmsg, /* ok */ 13177f4e4868SDaniel Lezcano .recvmsg = sock_common_recvmsg, /* ok */ 13187f4e4868SDaniel Lezcano .mmap = sock_no_mmap, 13197f4e4868SDaniel Lezcano .sendpage = sock_no_sendpage, 13207f4e4868SDaniel Lezcano #ifdef CONFIG_COMPAT 13217f4e4868SDaniel Lezcano .compat_setsockopt = compat_sock_common_setsockopt, 13227f4e4868SDaniel Lezcano .compat_getsockopt = compat_sock_common_getsockopt, 13237f4e4868SDaniel Lezcano #endif 13247f4e4868SDaniel Lezcano }; 13257f4e4868SDaniel Lezcano 13267f4e4868SDaniel Lezcano static struct inet_protosw rawv6_protosw = { 13277f4e4868SDaniel Lezcano .type = SOCK_RAW, 13287f4e4868SDaniel Lezcano .protocol = IPPROTO_IP, /* wild card */ 13297f4e4868SDaniel Lezcano .prot = &rawv6_prot, 13307f4e4868SDaniel Lezcano .ops = &inet6_sockraw_ops, 13317f4e4868SDaniel Lezcano .no_check = UDP_CSUM_DEFAULT, 13327f4e4868SDaniel Lezcano .flags = INET_PROTOSW_REUSE, 13337f4e4868SDaniel Lezcano }; 13347f4e4868SDaniel Lezcano 13357f4e4868SDaniel Lezcano int __init rawv6_init(void) 13367f4e4868SDaniel Lezcano { 13377f4e4868SDaniel Lezcano int ret; 13387f4e4868SDaniel Lezcano 13397f4e4868SDaniel Lezcano ret = inet6_register_protosw(&rawv6_protosw); 13407f4e4868SDaniel Lezcano if (ret) 13417f4e4868SDaniel Lezcano goto out; 13427f4e4868SDaniel Lezcano out: 13437f4e4868SDaniel Lezcano return ret; 13447f4e4868SDaniel Lezcano } 13457f4e4868SDaniel Lezcano 134609f7709fSDaniel Lezcano void rawv6_exit(void) 13477f4e4868SDaniel Lezcano { 13487f4e4868SDaniel Lezcano inet6_unregister_protosw(&rawv6_protosw); 13497f4e4868SDaniel Lezcano } 1350