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 * $Id: raw.c,v 1.51 2002/02/01 22:01:04 davem Exp $ 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * Fixes: 131da177e4SLinus Torvalds * Hideaki YOSHIFUJI : sin6_scope_id support 141da177e4SLinus Torvalds * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance) 151da177e4SLinus Torvalds * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data 161da177e4SLinus Torvalds * 171da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 181da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 191da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 201da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 211da177e4SLinus Torvalds */ 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds #include <linux/errno.h> 241da177e4SLinus Torvalds #include <linux/types.h> 251da177e4SLinus Torvalds #include <linux/socket.h> 261da177e4SLinus Torvalds #include <linux/sockios.h> 271da177e4SLinus Torvalds #include <linux/net.h> 281da177e4SLinus Torvalds #include <linux/in6.h> 291da177e4SLinus Torvalds #include <linux/netdevice.h> 301da177e4SLinus Torvalds #include <linux/if_arp.h> 311da177e4SLinus Torvalds #include <linux/icmpv6.h> 321da177e4SLinus Torvalds #include <linux/netfilter.h> 331da177e4SLinus Torvalds #include <linux/netfilter_ipv6.h> 343305b80cSHerbert Xu #include <linux/skbuff.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> 5359fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 547be96f76SMasahide NAKAMURA #include <net/mip6.h> 557be96f76SMasahide NAKAMURA #endif 561da177e4SLinus Torvalds 57b673e4dfSPavel Emelyanov #include <net/raw.h> 581da177e4SLinus Torvalds #include <net/rawv6.h> 591da177e4SLinus Torvalds #include <net/xfrm.h> 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds #include <linux/proc_fs.h> 621da177e4SLinus Torvalds #include <linux/seq_file.h> 631da177e4SLinus Torvalds 64b673e4dfSPavel Emelyanov static struct raw_hashinfo raw_v6_hashinfo = { 65b673e4dfSPavel Emelyanov .lock = __RW_LOCK_UNLOCKED(), 66b673e4dfSPavel Emelyanov }; 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds static void raw_v6_hash(struct sock *sk) 691da177e4SLinus Torvalds { 7065b4c50bSPavel Emelyanov raw_hash_sk(sk, &raw_v6_hashinfo); 711da177e4SLinus Torvalds } 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds static void raw_v6_unhash(struct sock *sk) 741da177e4SLinus Torvalds { 75b673e4dfSPavel Emelyanov write_lock_bh(&raw_v6_hashinfo.lock); 761da177e4SLinus Torvalds if (sk_del_node_init(sk)) 771da177e4SLinus Torvalds sock_prot_dec_use(sk->sk_prot); 78b673e4dfSPavel Emelyanov write_unlock_bh(&raw_v6_hashinfo.lock); 791da177e4SLinus Torvalds } 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds 8269d6da0bSPavel Emelyanov static struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num, 8369d6da0bSPavel Emelyanov struct in6_addr *loc_addr, struct in6_addr *rmt_addr, int dif) 841da177e4SLinus Torvalds { 851da177e4SLinus Torvalds struct hlist_node *node; 861da177e4SLinus Torvalds int is_multicast = ipv6_addr_is_multicast(loc_addr); 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds sk_for_each_from(sk, node) 891da177e4SLinus Torvalds if (inet_sk(sk)->num == num) { 901da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds if (!ipv6_addr_any(&np->daddr) && 931da177e4SLinus Torvalds !ipv6_addr_equal(&np->daddr, rmt_addr)) 941da177e4SLinus Torvalds continue; 951da177e4SLinus Torvalds 960bd1b59bSAndrew McDonald if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) 970bd1b59bSAndrew McDonald continue; 980bd1b59bSAndrew McDonald 991da177e4SLinus Torvalds if (!ipv6_addr_any(&np->rcv_saddr)) { 1001da177e4SLinus Torvalds if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) 1011da177e4SLinus Torvalds goto found; 1021da177e4SLinus Torvalds if (is_multicast && 1031da177e4SLinus Torvalds inet6_mc_check(sk, loc_addr, rmt_addr)) 1041da177e4SLinus Torvalds goto found; 1051da177e4SLinus Torvalds continue; 1061da177e4SLinus Torvalds } 1071da177e4SLinus Torvalds goto found; 1081da177e4SLinus Torvalds } 1091da177e4SLinus Torvalds sk = NULL; 1101da177e4SLinus Torvalds found: 1111da177e4SLinus Torvalds return sk; 1121da177e4SLinus Torvalds } 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds /* 1151da177e4SLinus Torvalds * 0 - deliver 1161da177e4SLinus Torvalds * 1 - block 1171da177e4SLinus Torvalds */ 1181da177e4SLinus Torvalds static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) 1191da177e4SLinus Torvalds { 1201da177e4SLinus Torvalds struct icmp6hdr *icmph; 1211da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { 1241da177e4SLinus Torvalds __u32 *data = &rp->filter.data[0]; 1251da177e4SLinus Torvalds int bit_nr; 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds icmph = (struct icmp6hdr *) skb->data; 1281da177e4SLinus Torvalds bit_nr = icmph->icmp6_type; 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; 1311da177e4SLinus Torvalds } 1321da177e4SLinus Torvalds return 0; 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds 13559fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 13659fbb3a6SMasahide NAKAMURA static int (*mh_filter)(struct sock *sock, struct sk_buff *skb); 13759fbb3a6SMasahide NAKAMURA 13859fbb3a6SMasahide NAKAMURA int rawv6_mh_filter_register(int (*filter)(struct sock *sock, 13959fbb3a6SMasahide NAKAMURA struct sk_buff *skb)) 14059fbb3a6SMasahide NAKAMURA { 14159fbb3a6SMasahide NAKAMURA rcu_assign_pointer(mh_filter, filter); 14259fbb3a6SMasahide NAKAMURA return 0; 14359fbb3a6SMasahide NAKAMURA } 14459fbb3a6SMasahide NAKAMURA EXPORT_SYMBOL(rawv6_mh_filter_register); 14559fbb3a6SMasahide NAKAMURA 14659fbb3a6SMasahide NAKAMURA int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock, 14759fbb3a6SMasahide NAKAMURA struct sk_buff *skb)) 14859fbb3a6SMasahide NAKAMURA { 14959fbb3a6SMasahide NAKAMURA rcu_assign_pointer(mh_filter, NULL); 15059fbb3a6SMasahide NAKAMURA synchronize_rcu(); 15159fbb3a6SMasahide NAKAMURA return 0; 15259fbb3a6SMasahide NAKAMURA } 15359fbb3a6SMasahide NAKAMURA EXPORT_SYMBOL(rawv6_mh_filter_unregister); 15459fbb3a6SMasahide NAKAMURA 15559fbb3a6SMasahide NAKAMURA #endif 15659fbb3a6SMasahide NAKAMURA 1571da177e4SLinus Torvalds /* 1581da177e4SLinus Torvalds * demultiplex raw sockets. 1591da177e4SLinus Torvalds * (should consider queueing the skb in the sock receive_queue 1601da177e4SLinus Torvalds * without calling rawv6.c) 1611da177e4SLinus Torvalds * 1621da177e4SLinus Torvalds * Caller owns SKB so we must make clones. 1631da177e4SLinus Torvalds */ 16469d6da0bSPavel Emelyanov static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) 1651da177e4SLinus Torvalds { 1661da177e4SLinus Torvalds struct in6_addr *saddr; 1671da177e4SLinus Torvalds struct in6_addr *daddr; 1681da177e4SLinus Torvalds struct sock *sk; 169d13964f4SPatrick McHardy int delivered = 0; 1701da177e4SLinus Torvalds __u8 hash; 1711da177e4SLinus Torvalds 1720660e03fSArnaldo Carvalho de Melo saddr = &ipv6_hdr(skb)->saddr; 1731da177e4SLinus Torvalds daddr = saddr + 1; 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds hash = nexthdr & (MAX_INET_PROTOS - 1); 1761da177e4SLinus Torvalds 177b673e4dfSPavel Emelyanov read_lock(&raw_v6_hashinfo.lock); 178b673e4dfSPavel Emelyanov sk = sk_head(&raw_v6_hashinfo.ht[hash]); 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds /* 1811da177e4SLinus Torvalds * The first socket found will be delivered after 1821da177e4SLinus Torvalds * delivery to transport protocols. 1831da177e4SLinus Torvalds */ 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds if (sk == NULL) 1861da177e4SLinus Torvalds goto out; 1871da177e4SLinus Torvalds 1882dac4b96SYOSHIFUJI Hideaki sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds while (sk) { 1917be96f76SMasahide NAKAMURA int filtered; 1927be96f76SMasahide NAKAMURA 193d13964f4SPatrick McHardy delivered = 1; 1947be96f76SMasahide NAKAMURA switch (nexthdr) { 1957be96f76SMasahide NAKAMURA case IPPROTO_ICMPV6: 1967be96f76SMasahide NAKAMURA filtered = icmpv6_filter(sk, skb); 1977be96f76SMasahide NAKAMURA break; 19859fbb3a6SMasahide NAKAMURA 19959fbb3a6SMasahide NAKAMURA #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) 2007be96f76SMasahide NAKAMURA case IPPROTO_MH: 20159fbb3a6SMasahide NAKAMURA { 2027be96f76SMasahide NAKAMURA /* XXX: To validate MH only once for each packet, 2037be96f76SMasahide NAKAMURA * this is placed here. It should be after checking 2047be96f76SMasahide NAKAMURA * xfrm policy, however it doesn't. The checking xfrm 2057be96f76SMasahide NAKAMURA * policy is placed in rawv6_rcv() because it is 2067be96f76SMasahide NAKAMURA * required for each socket. 2077be96f76SMasahide NAKAMURA */ 20859fbb3a6SMasahide NAKAMURA int (*filter)(struct sock *sock, struct sk_buff *skb); 20959fbb3a6SMasahide NAKAMURA 21059fbb3a6SMasahide NAKAMURA filter = rcu_dereference(mh_filter); 21159fbb3a6SMasahide NAKAMURA filtered = filter ? filter(sk, skb) : 0; 2127be96f76SMasahide NAKAMURA break; 21359fbb3a6SMasahide NAKAMURA } 2147be96f76SMasahide NAKAMURA #endif 2157be96f76SMasahide NAKAMURA default: 2167be96f76SMasahide NAKAMURA filtered = 0; 2177be96f76SMasahide NAKAMURA break; 2187be96f76SMasahide NAKAMURA } 2197be96f76SMasahide NAKAMURA 2207be96f76SMasahide NAKAMURA if (filtered < 0) 2217be96f76SMasahide NAKAMURA break; 2227be96f76SMasahide NAKAMURA if (filtered == 0) { 2231da177e4SLinus Torvalds struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds /* Not releasing hash table! */ 2269fb9cbb1SYasuyuki Kozakai if (clone) { 2279fb9cbb1SYasuyuki Kozakai nf_reset(clone); 2281da177e4SLinus Torvalds rawv6_rcv(sk, clone); 2291da177e4SLinus Torvalds } 2309fb9cbb1SYasuyuki Kozakai } 2310bd1b59bSAndrew McDonald sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr, 2322dac4b96SYOSHIFUJI Hideaki IP6CB(skb)->iif); 2331da177e4SLinus Torvalds } 2341da177e4SLinus Torvalds out: 235b673e4dfSPavel Emelyanov read_unlock(&raw_v6_hashinfo.lock); 236d13964f4SPatrick McHardy return delivered; 2371da177e4SLinus Torvalds } 2381da177e4SLinus Torvalds 23969d6da0bSPavel Emelyanov int raw6_local_deliver(struct sk_buff *skb, int nexthdr) 24069d6da0bSPavel Emelyanov { 24169d6da0bSPavel Emelyanov struct sock *raw_sk; 24269d6da0bSPavel Emelyanov 243b673e4dfSPavel Emelyanov raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]); 24469d6da0bSPavel Emelyanov if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) 24569d6da0bSPavel Emelyanov raw_sk = NULL; 24669d6da0bSPavel Emelyanov 24769d6da0bSPavel Emelyanov return raw_sk != NULL; 24869d6da0bSPavel Emelyanov } 24969d6da0bSPavel Emelyanov 2501da177e4SLinus Torvalds /* This cleans up af_inet6 a bit. -DaveM */ 2511da177e4SLinus Torvalds static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) 2521da177e4SLinus Torvalds { 2531da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 2541da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 2551da177e4SLinus Torvalds struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; 256e69a4adcSAl Viro __be32 v4addr = 0; 2571da177e4SLinus Torvalds int addr_type; 2581da177e4SLinus Torvalds int err; 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133) 2611da177e4SLinus Torvalds return -EINVAL; 2621da177e4SLinus Torvalds addr_type = ipv6_addr_type(&addr->sin6_addr); 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds /* Raw sockets are IPv6 only */ 2651da177e4SLinus Torvalds if (addr_type == IPV6_ADDR_MAPPED) 2661da177e4SLinus Torvalds return(-EADDRNOTAVAIL); 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds lock_sock(sk); 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds err = -EINVAL; 2711da177e4SLinus Torvalds if (sk->sk_state != TCP_CLOSE) 2721da177e4SLinus Torvalds goto out; 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds /* Check if the address belongs to the host. */ 2751da177e4SLinus Torvalds if (addr_type != IPV6_ADDR_ANY) { 2761da177e4SLinus Torvalds struct net_device *dev = NULL; 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds if (addr_type & IPV6_ADDR_LINKLOCAL) { 2791da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) && 2801da177e4SLinus Torvalds addr->sin6_scope_id) { 2811da177e4SLinus Torvalds /* Override any existing binding, if another 2821da177e4SLinus Torvalds * one is supplied by user. 2831da177e4SLinus Torvalds */ 2841da177e4SLinus Torvalds sk->sk_bound_dev_if = addr->sin6_scope_id; 2851da177e4SLinus Torvalds } 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds /* Binding to link-local address requires an interface */ 2881da177e4SLinus Torvalds if (!sk->sk_bound_dev_if) 2891da177e4SLinus Torvalds goto out; 2901da177e4SLinus Torvalds 291881d966bSEric W. Biederman dev = dev_get_by_index(&init_net, sk->sk_bound_dev_if); 2921da177e4SLinus Torvalds if (!dev) { 2931da177e4SLinus Torvalds err = -ENODEV; 2941da177e4SLinus Torvalds goto out; 2951da177e4SLinus Torvalds } 2961da177e4SLinus Torvalds } 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds /* ipv4 addr of the socket is invalid. Only the 2991da177e4SLinus Torvalds * unspecified and mapped address have a v4 equivalent. 3001da177e4SLinus Torvalds */ 3011da177e4SLinus Torvalds v4addr = LOOPBACK4_IPV6; 3021da177e4SLinus Torvalds if (!(addr_type & IPV6_ADDR_MULTICAST)) { 3031da177e4SLinus Torvalds err = -EADDRNOTAVAIL; 3041da177e4SLinus Torvalds if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) { 3051da177e4SLinus Torvalds if (dev) 3061da177e4SLinus Torvalds dev_put(dev); 3071da177e4SLinus Torvalds goto out; 3081da177e4SLinus Torvalds } 3091da177e4SLinus Torvalds } 3101da177e4SLinus Torvalds if (dev) 3111da177e4SLinus Torvalds dev_put(dev); 3121da177e4SLinus Torvalds } 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds inet->rcv_saddr = inet->saddr = v4addr; 3151da177e4SLinus Torvalds ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); 3161da177e4SLinus Torvalds if (!(addr_type & IPV6_ADDR_MULTICAST)) 3171da177e4SLinus Torvalds ipv6_addr_copy(&np->saddr, &addr->sin6_addr); 3181da177e4SLinus Torvalds err = 0; 3191da177e4SLinus Torvalds out: 3201da177e4SLinus Torvalds release_sock(sk); 3211da177e4SLinus Torvalds return err; 3221da177e4SLinus Torvalds } 3231da177e4SLinus Torvalds 32469d6da0bSPavel Emelyanov static void rawv6_err(struct sock *sk, struct sk_buff *skb, 3251da177e4SLinus Torvalds struct inet6_skb_parm *opt, 32604ce6909SAl Viro int type, int code, int offset, __be32 info) 3271da177e4SLinus Torvalds { 3281da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 3291da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 3301da177e4SLinus Torvalds int err; 3311da177e4SLinus Torvalds int harderr; 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds /* Report error on raw socket, if: 3341da177e4SLinus Torvalds 1. User requested recverr. 3351da177e4SLinus Torvalds 2. Socket is connected (otherwise the error indication 3361da177e4SLinus Torvalds is useless without recverr and error is hard. 3371da177e4SLinus Torvalds */ 3381da177e4SLinus Torvalds if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) 3391da177e4SLinus Torvalds return; 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds harderr = icmpv6_err_convert(type, code, &err); 3421da177e4SLinus Torvalds if (type == ICMPV6_PKT_TOOBIG) 3431da177e4SLinus Torvalds harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds if (np->recverr) { 3461da177e4SLinus Torvalds u8 *payload = skb->data; 3471da177e4SLinus Torvalds if (!inet->hdrincl) 3481da177e4SLinus Torvalds payload += offset; 3491da177e4SLinus Torvalds ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); 3501da177e4SLinus Torvalds } 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds if (np->recverr || harderr) { 3531da177e4SLinus Torvalds sk->sk_err = err; 3541da177e4SLinus Torvalds sk->sk_error_report(sk); 3551da177e4SLinus Torvalds } 3561da177e4SLinus Torvalds } 3571da177e4SLinus Torvalds 35869d6da0bSPavel Emelyanov void raw6_icmp_error(struct sk_buff *skb, int nexthdr, 35969d6da0bSPavel Emelyanov int type, int code, int inner_offset, __be32 info) 36069d6da0bSPavel Emelyanov { 36169d6da0bSPavel Emelyanov struct sock *sk; 36269d6da0bSPavel Emelyanov int hash; 36369d6da0bSPavel Emelyanov struct in6_addr *saddr, *daddr; 36469d6da0bSPavel Emelyanov 365b673e4dfSPavel Emelyanov hash = nexthdr & (RAW_HTABLE_SIZE - 1); 36669d6da0bSPavel Emelyanov 367b673e4dfSPavel Emelyanov read_lock(&raw_v6_hashinfo.lock); 368b673e4dfSPavel Emelyanov sk = sk_head(&raw_v6_hashinfo.ht[hash]); 36969d6da0bSPavel Emelyanov if (sk != NULL) { 37069d6da0bSPavel Emelyanov saddr = &ipv6_hdr(skb)->saddr; 37169d6da0bSPavel Emelyanov daddr = &ipv6_hdr(skb)->daddr; 37269d6da0bSPavel Emelyanov 37369d6da0bSPavel Emelyanov while ((sk = __raw_v6_lookup(sk, nexthdr, saddr, daddr, 37469d6da0bSPavel Emelyanov IP6CB(skb)->iif))) { 37569d6da0bSPavel Emelyanov rawv6_err(sk, skb, NULL, type, code, 37669d6da0bSPavel Emelyanov inner_offset, info); 37769d6da0bSPavel Emelyanov sk = sk_next(sk); 37869d6da0bSPavel Emelyanov } 37969d6da0bSPavel Emelyanov } 380b673e4dfSPavel Emelyanov read_unlock(&raw_v6_hashinfo.lock); 38169d6da0bSPavel Emelyanov } 38269d6da0bSPavel Emelyanov 3831da177e4SLinus Torvalds static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) 3841da177e4SLinus Torvalds { 3851da177e4SLinus Torvalds if ((raw6_sk(sk)->checksum || sk->sk_filter) && 386fb286bb2SHerbert Xu skb_checksum_complete(skb)) { 387a92aa318SWang Chen atomic_inc(&sk->sk_drops); 3881da177e4SLinus Torvalds kfree_skb(skb); 3891da177e4SLinus Torvalds return 0; 3901da177e4SLinus Torvalds } 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds /* Charge it to the socket. */ 3931da177e4SLinus Torvalds if (sock_queue_rcv_skb(sk,skb)<0) { 394a92aa318SWang Chen atomic_inc(&sk->sk_drops); 3951da177e4SLinus Torvalds kfree_skb(skb); 3961da177e4SLinus Torvalds return 0; 3971da177e4SLinus Torvalds } 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds return 0; 4001da177e4SLinus Torvalds } 4011da177e4SLinus Torvalds 4021da177e4SLinus Torvalds /* 4031da177e4SLinus Torvalds * This is next to useless... 4041da177e4SLinus Torvalds * if we demultiplex in network layer we don't need the extra call 4051da177e4SLinus Torvalds * just to queue the skb... 4061da177e4SLinus Torvalds * maybe we could have the network decide upon a hint if it 4071da177e4SLinus Torvalds * should call raw_rcv for demultiplexing 4081da177e4SLinus Torvalds */ 4091da177e4SLinus Torvalds int rawv6_rcv(struct sock *sk, struct sk_buff *skb) 4101da177e4SLinus Torvalds { 4111da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 4121da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { 415a92aa318SWang Chen atomic_inc(&sk->sk_drops); 4161da177e4SLinus Torvalds kfree_skb(skb); 4171da177e4SLinus Torvalds return NET_RX_DROP; 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds if (!rp->checksum) 4211da177e4SLinus Torvalds skb->ip_summed = CHECKSUM_UNNECESSARY; 4221da177e4SLinus Torvalds 42384fa7933SPatrick McHardy if (skb->ip_summed == CHECKSUM_COMPLETE) { 424d56f90a7SArnaldo Carvalho de Melo skb_postpull_rcsum(skb, skb_network_header(skb), 425cfe1fc77SArnaldo Carvalho de Melo skb_network_header_len(skb)); 4260660e03fSArnaldo Carvalho de Melo if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 4270660e03fSArnaldo Carvalho de Melo &ipv6_hdr(skb)->daddr, 428fb286bb2SHerbert Xu skb->len, inet->num, skb->csum)) 429fb286bb2SHerbert Xu skb->ip_summed = CHECKSUM_UNNECESSARY; 4301da177e4SLinus Torvalds } 43160476372SHerbert Xu if (!skb_csum_unnecessary(skb)) 4320660e03fSArnaldo Carvalho de Melo skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 4330660e03fSArnaldo Carvalho de Melo &ipv6_hdr(skb)->daddr, 4340660e03fSArnaldo Carvalho de Melo skb->len, 4350660e03fSArnaldo Carvalho de Melo inet->num, 0)); 4361da177e4SLinus Torvalds 4371da177e4SLinus Torvalds if (inet->hdrincl) { 438fb286bb2SHerbert Xu if (skb_checksum_complete(skb)) { 439a92aa318SWang Chen atomic_inc(&sk->sk_drops); 4401da177e4SLinus Torvalds kfree_skb(skb); 4411da177e4SLinus Torvalds return 0; 4421da177e4SLinus Torvalds } 4431da177e4SLinus Torvalds } 4441da177e4SLinus Torvalds 4451da177e4SLinus Torvalds rawv6_rcv_skb(sk, skb); 4461da177e4SLinus Torvalds return 0; 4471da177e4SLinus Torvalds } 4481da177e4SLinus Torvalds 4491da177e4SLinus Torvalds 4501da177e4SLinus Torvalds /* 4511da177e4SLinus Torvalds * This should be easy, if there is something there 4521da177e4SLinus Torvalds * we return it, otherwise we block. 4531da177e4SLinus Torvalds */ 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, 4561da177e4SLinus Torvalds struct msghdr *msg, size_t len, 4571da177e4SLinus Torvalds int noblock, int flags, int *addr_len) 4581da177e4SLinus Torvalds { 4591da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 4601da177e4SLinus Torvalds struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; 4611da177e4SLinus Torvalds struct sk_buff *skb; 4621da177e4SLinus Torvalds size_t copied; 4631da177e4SLinus Torvalds int err; 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds if (flags & MSG_OOB) 4661da177e4SLinus Torvalds return -EOPNOTSUPP; 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds if (addr_len) 4691da177e4SLinus Torvalds *addr_len=sizeof(*sin6); 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds if (flags & MSG_ERRQUEUE) 4721da177e4SLinus Torvalds return ipv6_recv_error(sk, msg, len); 4731da177e4SLinus Torvalds 4741da177e4SLinus Torvalds skb = skb_recv_datagram(sk, flags, noblock, &err); 4751da177e4SLinus Torvalds if (!skb) 4761da177e4SLinus Torvalds goto out; 4771da177e4SLinus Torvalds 4781da177e4SLinus Torvalds copied = skb->len; 4791da177e4SLinus Torvalds if (copied > len) { 4801da177e4SLinus Torvalds copied = len; 4811da177e4SLinus Torvalds msg->msg_flags |= MSG_TRUNC; 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds 48460476372SHerbert Xu if (skb_csum_unnecessary(skb)) { 4851da177e4SLinus Torvalds err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 4861da177e4SLinus Torvalds } else if (msg->msg_flags&MSG_TRUNC) { 487fb286bb2SHerbert Xu if (__skb_checksum_complete(skb)) 4881da177e4SLinus Torvalds goto csum_copy_err; 4891da177e4SLinus Torvalds err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 4901da177e4SLinus Torvalds } else { 4911da177e4SLinus Torvalds err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); 4921da177e4SLinus Torvalds if (err == -EINVAL) 4931da177e4SLinus Torvalds goto csum_copy_err; 4941da177e4SLinus Torvalds } 4951da177e4SLinus Torvalds if (err) 4961da177e4SLinus Torvalds goto out_free; 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds /* Copy the address. */ 4991da177e4SLinus Torvalds if (sin6) { 5001da177e4SLinus Torvalds sin6->sin6_family = AF_INET6; 501f59fc7f3STetsuo Handa sin6->sin6_port = 0; 5020660e03fSArnaldo Carvalho de Melo ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); 5031da177e4SLinus Torvalds sin6->sin6_flowinfo = 0; 5041da177e4SLinus Torvalds sin6->sin6_scope_id = 0; 5051da177e4SLinus Torvalds if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) 5061da177e4SLinus Torvalds sin6->sin6_scope_id = IP6CB(skb)->iif; 5071da177e4SLinus Torvalds } 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds sock_recv_timestamp(msg, sk, skb); 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds if (np->rxopt.all) 5121da177e4SLinus Torvalds datagram_recv_ctl(sk, msg, skb); 5131da177e4SLinus Torvalds 5141da177e4SLinus Torvalds err = copied; 5151da177e4SLinus Torvalds if (flags & MSG_TRUNC) 5161da177e4SLinus Torvalds err = skb->len; 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds out_free: 5191da177e4SLinus Torvalds skb_free_datagram(sk, skb); 5201da177e4SLinus Torvalds out: 5211da177e4SLinus Torvalds return err; 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds csum_copy_err: 5243305b80cSHerbert Xu skb_kill_datagram(sk, skb, flags); 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds /* Error for blocking case is chosen to masquerade 5271da177e4SLinus Torvalds as some normal condition. 5281da177e4SLinus Torvalds */ 5291da177e4SLinus Torvalds err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; 530a92aa318SWang Chen atomic_inc(&sk->sk_drops); 5313305b80cSHerbert Xu goto out; 5321da177e4SLinus Torvalds } 5331da177e4SLinus Torvalds 5341da177e4SLinus Torvalds static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, 535357b40a1SHerbert Xu struct raw6_sock *rp) 5361da177e4SLinus Torvalds { 5371da177e4SLinus Torvalds struct sk_buff *skb; 5381da177e4SLinus Torvalds int err = 0; 539357b40a1SHerbert Xu int offset; 540357b40a1SHerbert Xu int len; 541679a8738SHerbert Xu int total_len; 542868c86bcSAl Viro __wsum tmp_csum; 543868c86bcSAl Viro __sum16 csum; 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds if (!rp->checksum) 5461da177e4SLinus Torvalds goto send; 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvalds if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) 5491da177e4SLinus Torvalds goto out; 5501da177e4SLinus Torvalds 551357b40a1SHerbert Xu offset = rp->offset; 552d56f90a7SArnaldo Carvalho de Melo total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) - 553d56f90a7SArnaldo Carvalho de Melo skb->data); 554679a8738SHerbert Xu if (offset >= total_len - 1) { 5551da177e4SLinus Torvalds err = -EINVAL; 556357b40a1SHerbert Xu ip6_flush_pending_frames(sk); 5571da177e4SLinus Torvalds goto out; 5581da177e4SLinus Torvalds } 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds /* should be check HW csum miyazawa */ 5611da177e4SLinus Torvalds if (skb_queue_len(&sk->sk_write_queue) == 1) { 5621da177e4SLinus Torvalds /* 5631da177e4SLinus Torvalds * Only one fragment on the socket. 5641da177e4SLinus Torvalds */ 5651da177e4SLinus Torvalds tmp_csum = skb->csum; 5661da177e4SLinus Torvalds } else { 567357b40a1SHerbert Xu struct sk_buff *csum_skb = NULL; 5681da177e4SLinus Torvalds tmp_csum = 0; 5691da177e4SLinus Torvalds 5701da177e4SLinus Torvalds skb_queue_walk(&sk->sk_write_queue, skb) { 5711da177e4SLinus Torvalds tmp_csum = csum_add(tmp_csum, skb->csum); 572357b40a1SHerbert Xu 573357b40a1SHerbert Xu if (csum_skb) 574357b40a1SHerbert Xu continue; 575357b40a1SHerbert Xu 576ea2ae17dSArnaldo Carvalho de Melo len = skb->len - skb_transport_offset(skb); 577357b40a1SHerbert Xu if (offset >= len) { 578357b40a1SHerbert Xu offset -= len; 579357b40a1SHerbert Xu continue; 5801da177e4SLinus Torvalds } 581357b40a1SHerbert Xu 582357b40a1SHerbert Xu csum_skb = skb; 5831da177e4SLinus Torvalds } 5841da177e4SLinus Torvalds 585357b40a1SHerbert Xu skb = csum_skb; 586357b40a1SHerbert Xu } 587357b40a1SHerbert Xu 588ea2ae17dSArnaldo Carvalho de Melo offset += skb_transport_offset(skb); 589357b40a1SHerbert Xu if (skb_copy_bits(skb, offset, &csum, 2)) 590357b40a1SHerbert Xu BUG(); 591357b40a1SHerbert Xu 5921da177e4SLinus Torvalds /* in case cksum was not initialized */ 593357b40a1SHerbert Xu if (unlikely(csum)) 5945f92a738SAl Viro tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); 5951da177e4SLinus Torvalds 596868c86bcSAl Viro csum = csum_ipv6_magic(&fl->fl6_src, 5971da177e4SLinus Torvalds &fl->fl6_dst, 598679a8738SHerbert Xu total_len, fl->proto, tmp_csum); 5991da177e4SLinus Torvalds 600f6ab0288SAl Viro if (csum == 0 && fl->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, 6131da177e4SLinus Torvalds struct flowi *fl, struct rt6_info *rt, 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 unsigned int hh_len; 6201da177e4SLinus Torvalds int err; 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds if (length > rt->u.dst.dev->mtu) { 6231da177e4SLinus Torvalds ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); 6241da177e4SLinus Torvalds return -EMSGSIZE; 6251da177e4SLinus Torvalds } 6261da177e4SLinus Torvalds if (flags&MSG_PROBE) 6271da177e4SLinus Torvalds goto out; 6281da177e4SLinus Torvalds 6291da177e4SLinus Torvalds hh_len = LL_RESERVED_SPACE(rt->u.dst.dev); 6301da177e4SLinus Torvalds 6311da177e4SLinus Torvalds skb = sock_alloc_send_skb(sk, length+hh_len+15, 6321da177e4SLinus Torvalds flags&MSG_DONTWAIT, &err); 6331da177e4SLinus Torvalds if (skb == NULL) 6341da177e4SLinus Torvalds goto error; 6351da177e4SLinus Torvalds skb_reserve(skb, hh_len); 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds skb->priority = sk->sk_priority; 6381da177e4SLinus Torvalds skb->dst = dst_clone(&rt->u.dst); 6391da177e4SLinus Torvalds 6401ced98e8SArnaldo Carvalho de Melo skb_put(skb, length); 6411ced98e8SArnaldo Carvalho de Melo skb_reset_network_header(skb); 6420660e03fSArnaldo Carvalho de Melo iph = ipv6_hdr(skb); 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds skb->ip_summed = CHECKSUM_NONE; 6451da177e4SLinus Torvalds 646b0e380b1SArnaldo Carvalho de Melo skb->transport_header = skb->network_header; 6471da177e4SLinus Torvalds err = memcpy_fromiovecend((void *)iph, from, 0, length); 6481da177e4SLinus Torvalds if (err) 6491da177e4SLinus Torvalds goto error_fault; 6501da177e4SLinus Torvalds 651a11d206dSYOSHIFUJI Hideaki IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS); 6526e23ae2aSPatrick McHardy err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev, 6531da177e4SLinus Torvalds dst_output); 6541da177e4SLinus Torvalds if (err > 0) 6553320da89SHerbert Xu err = np->recverr ? net_xmit_errno(err) : 0; 6561da177e4SLinus Torvalds if (err) 6571da177e4SLinus Torvalds goto error; 6581da177e4SLinus Torvalds out: 6591da177e4SLinus Torvalds return 0; 6601da177e4SLinus Torvalds 6611da177e4SLinus Torvalds error_fault: 6621da177e4SLinus Torvalds err = -EFAULT; 6631da177e4SLinus Torvalds kfree_skb(skb); 6641da177e4SLinus Torvalds error: 665a11d206dSYOSHIFUJI Hideaki IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); 6661da177e4SLinus Torvalds return err; 6671da177e4SLinus Torvalds } 6681da177e4SLinus Torvalds 669a27b58feSHeiko Carstens static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) 6701da177e4SLinus Torvalds { 6711da177e4SLinus Torvalds struct iovec *iov; 6721da177e4SLinus Torvalds u8 __user *type = NULL; 6731da177e4SLinus Torvalds u8 __user *code = NULL; 6746e8f4d48SMasahide NAKAMURA u8 len = 0; 6751da177e4SLinus Torvalds int probed = 0; 6761da177e4SLinus Torvalds int i; 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds if (!msg->msg_iov) 679a27b58feSHeiko Carstens return 0; 6801da177e4SLinus Torvalds 6811da177e4SLinus Torvalds for (i = 0; i < msg->msg_iovlen; i++) { 6821da177e4SLinus Torvalds iov = &msg->msg_iov[i]; 6831da177e4SLinus Torvalds if (!iov) 6841da177e4SLinus Torvalds continue; 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds switch (fl->proto) { 6871da177e4SLinus Torvalds case IPPROTO_ICMPV6: 6881da177e4SLinus Torvalds /* check if one-byte field is readable or not. */ 6891da177e4SLinus Torvalds if (iov->iov_base && iov->iov_len < 1) 6901da177e4SLinus Torvalds break; 6911da177e4SLinus Torvalds 6921da177e4SLinus Torvalds if (!type) { 6931da177e4SLinus Torvalds type = iov->iov_base; 6941da177e4SLinus Torvalds /* check if code field is readable or not. */ 6951da177e4SLinus Torvalds if (iov->iov_len > 1) 6961da177e4SLinus Torvalds code = type + 1; 6971da177e4SLinus Torvalds } else if (!code) 6981da177e4SLinus Torvalds code = iov->iov_base; 6991da177e4SLinus Torvalds 7001da177e4SLinus Torvalds if (type && code) { 701a27b58feSHeiko Carstens if (get_user(fl->fl_icmp_type, type) || 702a27b58feSHeiko Carstens get_user(fl->fl_icmp_code, code)) 703a27b58feSHeiko Carstens return -EFAULT; 7041da177e4SLinus Torvalds probed = 1; 7051da177e4SLinus Torvalds } 7061da177e4SLinus Torvalds break; 7076e8f4d48SMasahide NAKAMURA case IPPROTO_MH: 7086e8f4d48SMasahide NAKAMURA if (iov->iov_base && iov->iov_len < 1) 7096e8f4d48SMasahide NAKAMURA break; 7106e8f4d48SMasahide NAKAMURA /* check if type field is readable or not. */ 7116e8f4d48SMasahide NAKAMURA if (iov->iov_len > 2 - len) { 7126e8f4d48SMasahide NAKAMURA u8 __user *p = iov->iov_base; 713a27b58feSHeiko Carstens if (get_user(fl->fl_mh_type, &p[2 - len])) 714a27b58feSHeiko Carstens return -EFAULT; 7156e8f4d48SMasahide NAKAMURA probed = 1; 7166e8f4d48SMasahide NAKAMURA } else 7176e8f4d48SMasahide NAKAMURA len += iov->iov_len; 7186e8f4d48SMasahide NAKAMURA 7196e8f4d48SMasahide NAKAMURA break; 7201da177e4SLinus Torvalds default: 7211da177e4SLinus Torvalds probed = 1; 7221da177e4SLinus Torvalds break; 7231da177e4SLinus Torvalds } 7241da177e4SLinus Torvalds if (probed) 7251da177e4SLinus Torvalds break; 7261da177e4SLinus Torvalds } 727a27b58feSHeiko Carstens return 0; 7281da177e4SLinus Torvalds } 7291da177e4SLinus Torvalds 7301da177e4SLinus Torvalds static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, 7311da177e4SLinus Torvalds struct msghdr *msg, size_t len) 7321da177e4SLinus Torvalds { 7331da177e4SLinus Torvalds struct ipv6_txoptions opt_space; 7341da177e4SLinus Torvalds struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; 7351da177e4SLinus Torvalds struct in6_addr *daddr, *final_p = NULL, final; 7361da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 7371da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sk); 7381da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 7391da177e4SLinus Torvalds struct ipv6_txoptions *opt = NULL; 7401da177e4SLinus Torvalds struct ip6_flowlabel *flowlabel = NULL; 7411da177e4SLinus Torvalds struct dst_entry *dst = NULL; 7421da177e4SLinus Torvalds struct flowi fl; 7431da177e4SLinus Torvalds int addr_len = msg->msg_namelen; 7441da177e4SLinus Torvalds int hlimit = -1; 74541a1f8eaSYOSHIFUJI Hideaki int tclass = -1; 7461da177e4SLinus Torvalds u16 proto; 7471da177e4SLinus Torvalds int err; 7481da177e4SLinus Torvalds 7491da177e4SLinus Torvalds /* Rough check on arithmetic overflow, 750b59e139bSYOSHIFUJI Hideaki better check is made in ip6_append_data(). 7511da177e4SLinus Torvalds */ 752b59e139bSYOSHIFUJI Hideaki if (len > INT_MAX) 7531da177e4SLinus Torvalds return -EMSGSIZE; 7541da177e4SLinus Torvalds 7551da177e4SLinus Torvalds /* Mirror BSD error message compatibility */ 7561da177e4SLinus Torvalds if (msg->msg_flags & MSG_OOB) 7571da177e4SLinus Torvalds return -EOPNOTSUPP; 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds /* 7601da177e4SLinus Torvalds * Get and verify the address. 7611da177e4SLinus Torvalds */ 7621da177e4SLinus Torvalds memset(&fl, 0, sizeof(fl)); 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds if (sin6) { 7651da177e4SLinus Torvalds if (addr_len < SIN6_LEN_RFC2133) 7661da177e4SLinus Torvalds return -EINVAL; 7671da177e4SLinus Torvalds 7681da177e4SLinus Torvalds if (sin6->sin6_family && sin6->sin6_family != AF_INET6) 7691da177e4SLinus Torvalds return(-EAFNOSUPPORT); 7701da177e4SLinus Torvalds 7711da177e4SLinus Torvalds /* port is the proto value [0..255] carried in nexthdr */ 7721da177e4SLinus Torvalds proto = ntohs(sin6->sin6_port); 7731da177e4SLinus Torvalds 7741da177e4SLinus Torvalds if (!proto) 7751da177e4SLinus Torvalds proto = inet->num; 7761da177e4SLinus Torvalds else if (proto != inet->num) 7771da177e4SLinus Torvalds return(-EINVAL); 7781da177e4SLinus Torvalds 7791da177e4SLinus Torvalds if (proto > 255) 7801da177e4SLinus Torvalds return(-EINVAL); 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds daddr = &sin6->sin6_addr; 7831da177e4SLinus Torvalds if (np->sndflow) { 7841da177e4SLinus Torvalds fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; 7851da177e4SLinus Torvalds if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { 7861da177e4SLinus Torvalds flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); 7871da177e4SLinus Torvalds if (flowlabel == NULL) 7881da177e4SLinus Torvalds return -EINVAL; 7891da177e4SLinus Torvalds daddr = &flowlabel->dst; 7901da177e4SLinus Torvalds } 7911da177e4SLinus Torvalds } 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds /* 7941da177e4SLinus Torvalds * Otherwise it will be difficult to maintain 7951da177e4SLinus Torvalds * sk->sk_dst_cache. 7961da177e4SLinus Torvalds */ 7971da177e4SLinus Torvalds if (sk->sk_state == TCP_ESTABLISHED && 7981da177e4SLinus Torvalds ipv6_addr_equal(daddr, &np->daddr)) 7991da177e4SLinus Torvalds daddr = &np->daddr; 8001da177e4SLinus Torvalds 8011da177e4SLinus Torvalds if (addr_len >= sizeof(struct sockaddr_in6) && 8021da177e4SLinus Torvalds sin6->sin6_scope_id && 8031da177e4SLinus Torvalds ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) 8041da177e4SLinus Torvalds fl.oif = sin6->sin6_scope_id; 8051da177e4SLinus Torvalds } else { 8061da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 8071da177e4SLinus Torvalds return -EDESTADDRREQ; 8081da177e4SLinus Torvalds 8091da177e4SLinus Torvalds proto = inet->num; 8101da177e4SLinus Torvalds daddr = &np->daddr; 8111da177e4SLinus Torvalds fl.fl6_flowlabel = np->flow_label; 8121da177e4SLinus Torvalds } 8131da177e4SLinus Torvalds 8141da177e4SLinus Torvalds if (ipv6_addr_any(daddr)) { 8151da177e4SLinus Torvalds /* 8161da177e4SLinus Torvalds * unspecified destination address 8171da177e4SLinus Torvalds * treated as error... is this correct ? 8181da177e4SLinus Torvalds */ 8191da177e4SLinus Torvalds fl6_sock_release(flowlabel); 8201da177e4SLinus Torvalds return(-EINVAL); 8211da177e4SLinus Torvalds } 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds if (fl.oif == 0) 8241da177e4SLinus Torvalds fl.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 83141a1f8eaSYOSHIFUJI Hideaki err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); 8321da177e4SLinus Torvalds if (err < 0) { 8331da177e4SLinus Torvalds fl6_sock_release(flowlabel); 8341da177e4SLinus Torvalds return err; 8351da177e4SLinus Torvalds } 8361da177e4SLinus Torvalds if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { 8371da177e4SLinus Torvalds flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); 8381da177e4SLinus Torvalds if (flowlabel == NULL) 8391da177e4SLinus Torvalds return -EINVAL; 8401da177e4SLinus Torvalds } 8411da177e4SLinus Torvalds if (!(opt->opt_nflen|opt->opt_flen)) 8421da177e4SLinus Torvalds opt = NULL; 8431da177e4SLinus Torvalds } 8441da177e4SLinus Torvalds if (opt == NULL) 8451da177e4SLinus Torvalds opt = np->opt; 846df9890c3SYOSHIFUJI Hideaki if (flowlabel) 8471da177e4SLinus Torvalds opt = fl6_merge_options(&opt_space, flowlabel, opt); 848df9890c3SYOSHIFUJI Hideaki opt = ipv6_fixup_options(&opt_space, opt); 8491da177e4SLinus Torvalds 8501da177e4SLinus Torvalds fl.proto = proto; 851a27b58feSHeiko Carstens err = rawv6_probe_proto_opt(&fl, msg); 852a27b58feSHeiko Carstens if (err) 853a27b58feSHeiko Carstens goto out; 8541da177e4SLinus Torvalds 8551da177e4SLinus Torvalds ipv6_addr_copy(&fl.fl6_dst, daddr); 8561da177e4SLinus Torvalds if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) 8571da177e4SLinus Torvalds ipv6_addr_copy(&fl.fl6_src, &np->saddr); 8581da177e4SLinus Torvalds 8591da177e4SLinus Torvalds /* merge ip6_build_xmit from ip6_output */ 8601da177e4SLinus Torvalds if (opt && opt->srcrt) { 8611da177e4SLinus Torvalds struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; 8621da177e4SLinus Torvalds ipv6_addr_copy(&final, &fl.fl6_dst); 8631da177e4SLinus Torvalds ipv6_addr_copy(&fl.fl6_dst, rt0->addr); 8641da177e4SLinus Torvalds final_p = &final; 8651da177e4SLinus Torvalds } 8661da177e4SLinus Torvalds 8671da177e4SLinus Torvalds if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) 8681da177e4SLinus Torvalds fl.oif = np->mcast_oif; 869beb8d13bSVenkat Yekkirala security_sk_classify_flow(sk, &fl); 8701da177e4SLinus Torvalds 8711da177e4SLinus Torvalds err = ip6_dst_lookup(sk, &dst, &fl); 8721da177e4SLinus Torvalds if (err) 8731da177e4SLinus Torvalds goto out; 8741da177e4SLinus Torvalds if (final_p) 8751da177e4SLinus Torvalds ipv6_addr_copy(&fl.fl6_dst, final_p); 8761da177e4SLinus Torvalds 87714e50e57SDavid S. Miller if ((err = __xfrm_lookup(&dst, &fl, sk, 1)) < 0) { 87814e50e57SDavid S. Miller if (err == -EREMOTE) 87914e50e57SDavid S. Miller err = ip6_dst_blackhole(sk, &dst, &fl); 88014e50e57SDavid S. Miller if (err < 0) 8811da177e4SLinus Torvalds goto out; 88214e50e57SDavid S. Miller } 8831da177e4SLinus Torvalds 8841da177e4SLinus Torvalds if (hlimit < 0) { 8851da177e4SLinus Torvalds if (ipv6_addr_is_multicast(&fl.fl6_dst)) 8861da177e4SLinus Torvalds hlimit = np->mcast_hops; 8871da177e4SLinus Torvalds else 8881da177e4SLinus Torvalds hlimit = np->hop_limit; 8891da177e4SLinus Torvalds if (hlimit < 0) 8901da177e4SLinus Torvalds hlimit = dst_metric(dst, RTAX_HOPLIMIT); 8911da177e4SLinus Torvalds if (hlimit < 0) 8921da177e4SLinus Torvalds hlimit = ipv6_get_hoplimit(dst->dev); 8931da177e4SLinus Torvalds } 8941da177e4SLinus Torvalds 89541a1f8eaSYOSHIFUJI Hideaki if (tclass < 0) { 896e012d51cSYOSHIFUJI Hideaki tclass = np->tclass; 89741a1f8eaSYOSHIFUJI Hideaki if (tclass < 0) 89841a1f8eaSYOSHIFUJI Hideaki tclass = 0; 89941a1f8eaSYOSHIFUJI Hideaki } 90041a1f8eaSYOSHIFUJI Hideaki 9011da177e4SLinus Torvalds if (msg->msg_flags&MSG_CONFIRM) 9021da177e4SLinus Torvalds goto do_confirm; 9031da177e4SLinus Torvalds 9041da177e4SLinus Torvalds back_from_confirm: 9051da177e4SLinus Torvalds if (inet->hdrincl) { 9061da177e4SLinus Torvalds err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); 9071da177e4SLinus Torvalds } else { 9081da177e4SLinus Torvalds lock_sock(sk); 90941a1f8eaSYOSHIFUJI Hideaki err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, 91041a1f8eaSYOSHIFUJI Hideaki len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, 91141a1f8eaSYOSHIFUJI Hideaki msg->msg_flags); 9121da177e4SLinus Torvalds 9131da177e4SLinus Torvalds if (err) 9141da177e4SLinus Torvalds ip6_flush_pending_frames(sk); 9151da177e4SLinus Torvalds else if (!(msg->msg_flags & MSG_MORE)) 916357b40a1SHerbert Xu err = rawv6_push_pending_frames(sk, &fl, rp); 9173ef9d943SYOSHIFUJI Hideaki release_sock(sk); 9181da177e4SLinus Torvalds } 9191da177e4SLinus Torvalds done: 9206d3e85ecSNicolas DICHTEL dst_release(dst); 9211da177e4SLinus Torvalds out: 9221da177e4SLinus Torvalds fl6_sock_release(flowlabel); 9231da177e4SLinus Torvalds return err<0?err:len; 9241da177e4SLinus Torvalds do_confirm: 9251da177e4SLinus Torvalds dst_confirm(dst); 9261da177e4SLinus Torvalds if (!(msg->msg_flags & MSG_PROBE) || len) 9271da177e4SLinus Torvalds goto back_from_confirm; 9281da177e4SLinus Torvalds err = 0; 9291da177e4SLinus Torvalds goto done; 9301da177e4SLinus Torvalds } 9311da177e4SLinus Torvalds 9321da177e4SLinus Torvalds static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, 9331da177e4SLinus Torvalds char __user *optval, int optlen) 9341da177e4SLinus Torvalds { 9351da177e4SLinus Torvalds switch (optname) { 9361da177e4SLinus Torvalds case ICMPV6_FILTER: 9371da177e4SLinus Torvalds if (optlen > sizeof(struct icmp6_filter)) 9381da177e4SLinus Torvalds optlen = sizeof(struct icmp6_filter); 9391da177e4SLinus Torvalds if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) 9401da177e4SLinus Torvalds return -EFAULT; 9411da177e4SLinus Torvalds return 0; 9421da177e4SLinus Torvalds default: 9431da177e4SLinus Torvalds return -ENOPROTOOPT; 9443ff50b79SStephen Hemminger } 9451da177e4SLinus Torvalds 9461da177e4SLinus Torvalds return 0; 9471da177e4SLinus Torvalds } 9481da177e4SLinus Torvalds 9491da177e4SLinus Torvalds static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, 9501da177e4SLinus Torvalds char __user *optval, int __user *optlen) 9511da177e4SLinus Torvalds { 9521da177e4SLinus Torvalds int len; 9531da177e4SLinus Torvalds 9541da177e4SLinus Torvalds switch (optname) { 9551da177e4SLinus Torvalds case ICMPV6_FILTER: 9561da177e4SLinus Torvalds if (get_user(len, optlen)) 9571da177e4SLinus Torvalds return -EFAULT; 9581da177e4SLinus Torvalds if (len < 0) 9591da177e4SLinus Torvalds return -EINVAL; 9601da177e4SLinus Torvalds if (len > sizeof(struct icmp6_filter)) 9611da177e4SLinus Torvalds len = sizeof(struct icmp6_filter); 9621da177e4SLinus Torvalds if (put_user(len, optlen)) 9631da177e4SLinus Torvalds return -EFAULT; 9641da177e4SLinus Torvalds if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) 9651da177e4SLinus Torvalds return -EFAULT; 9661da177e4SLinus Torvalds return 0; 9671da177e4SLinus Torvalds default: 9681da177e4SLinus Torvalds return -ENOPROTOOPT; 9693ff50b79SStephen Hemminger } 9701da177e4SLinus Torvalds 9711da177e4SLinus Torvalds return 0; 9721da177e4SLinus Torvalds } 9731da177e4SLinus Torvalds 9741da177e4SLinus Torvalds 9753fdadf7dSDmitry Mishin static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, 9761da177e4SLinus Torvalds char __user *optval, int optlen) 9771da177e4SLinus Torvalds { 9781da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 9791da177e4SLinus Torvalds int val; 9801da177e4SLinus Torvalds 9811da177e4SLinus Torvalds if (get_user(val, (int __user *)optval)) 9821da177e4SLinus Torvalds return -EFAULT; 9831da177e4SLinus Torvalds 9841da177e4SLinus Torvalds switch (optname) { 9851da177e4SLinus Torvalds case IPV6_CHECKSUM: 9861da177e4SLinus Torvalds /* You may get strange result with a positive odd offset; 9871da177e4SLinus Torvalds RFC2292bis agrees with me. */ 9881da177e4SLinus Torvalds if (val > 0 && (val&1)) 9891da177e4SLinus Torvalds return(-EINVAL); 9901da177e4SLinus Torvalds if (val < 0) { 9911da177e4SLinus Torvalds rp->checksum = 0; 9921da177e4SLinus Torvalds } else { 9931da177e4SLinus Torvalds rp->checksum = 1; 9941da177e4SLinus Torvalds rp->offset = val; 9951da177e4SLinus Torvalds } 9961da177e4SLinus Torvalds 9971da177e4SLinus Torvalds return 0; 9981da177e4SLinus Torvalds break; 9991da177e4SLinus Torvalds 10001da177e4SLinus Torvalds default: 10011da177e4SLinus Torvalds return(-ENOPROTOOPT); 10021da177e4SLinus Torvalds } 10031da177e4SLinus Torvalds } 10041da177e4SLinus Torvalds 10053fdadf7dSDmitry Mishin static int rawv6_setsockopt(struct sock *sk, int level, int optname, 10063fdadf7dSDmitry Mishin char __user *optval, int optlen) 10071da177e4SLinus Torvalds { 10081da177e4SLinus Torvalds switch(level) { 10091da177e4SLinus Torvalds case SOL_RAW: 10101da177e4SLinus Torvalds break; 10111da177e4SLinus Torvalds 10121da177e4SLinus Torvalds case SOL_ICMPV6: 10131da177e4SLinus Torvalds if (inet_sk(sk)->num != IPPROTO_ICMPV6) 10141da177e4SLinus Torvalds return -EOPNOTSUPP; 10153fdadf7dSDmitry Mishin return rawv6_seticmpfilter(sk, level, optname, optval, 10161da177e4SLinus Torvalds optlen); 10171da177e4SLinus Torvalds case SOL_IPV6: 10181da177e4SLinus Torvalds if (optname == IPV6_CHECKSUM) 10191da177e4SLinus Torvalds break; 10201da177e4SLinus Torvalds default: 10213fdadf7dSDmitry Mishin return ipv6_setsockopt(sk, level, optname, optval, 10221da177e4SLinus Torvalds 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, 10303fdadf7dSDmitry Mishin char __user *optval, int optlen) 10313fdadf7dSDmitry Mishin { 10323fdadf7dSDmitry Mishin switch (level) { 10333fdadf7dSDmitry Mishin case SOL_RAW: 10343fdadf7dSDmitry Mishin break; 10353fdadf7dSDmitry Mishin case SOL_ICMPV6: 10363fdadf7dSDmitry Mishin if (inet_sk(sk)->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: 10611da177e4SLinus Torvalds if (rp->checksum == 0) 10621da177e4SLinus Torvalds val = -1; 10631da177e4SLinus Torvalds else 10641da177e4SLinus Torvalds val = rp->offset; 10651da177e4SLinus Torvalds break; 10661da177e4SLinus Torvalds 10671da177e4SLinus Torvalds default: 10681da177e4SLinus Torvalds return -ENOPROTOOPT; 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds 10711da177e4SLinus Torvalds len = min_t(unsigned int, sizeof(int), len); 10721da177e4SLinus Torvalds 10731da177e4SLinus Torvalds if (put_user(len, optlen)) 10741da177e4SLinus Torvalds return -EFAULT; 10751da177e4SLinus Torvalds if (copy_to_user(optval,&val,len)) 10761da177e4SLinus Torvalds return -EFAULT; 10771da177e4SLinus Torvalds return 0; 10781da177e4SLinus Torvalds } 10791da177e4SLinus Torvalds 10803fdadf7dSDmitry Mishin static int rawv6_getsockopt(struct sock *sk, int level, int optname, 10813fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 10823fdadf7dSDmitry Mishin { 10833fdadf7dSDmitry Mishin switch(level) { 10843fdadf7dSDmitry Mishin case SOL_RAW: 10853fdadf7dSDmitry Mishin break; 10863fdadf7dSDmitry Mishin 10873fdadf7dSDmitry Mishin case SOL_ICMPV6: 10883fdadf7dSDmitry Mishin if (inet_sk(sk)->num != IPPROTO_ICMPV6) 10893fdadf7dSDmitry Mishin return -EOPNOTSUPP; 10903fdadf7dSDmitry Mishin return rawv6_geticmpfilter(sk, level, optname, optval, 10913fdadf7dSDmitry Mishin optlen); 10923fdadf7dSDmitry Mishin case SOL_IPV6: 10933fdadf7dSDmitry Mishin if (optname == IPV6_CHECKSUM) 10943fdadf7dSDmitry Mishin break; 10953fdadf7dSDmitry Mishin default: 10963fdadf7dSDmitry Mishin return ipv6_getsockopt(sk, level, optname, optval, 10973fdadf7dSDmitry Mishin optlen); 10983ff50b79SStephen Hemminger } 10993ff50b79SStephen Hemminger 11003fdadf7dSDmitry Mishin return do_rawv6_getsockopt(sk, level, optname, optval, optlen); 11013fdadf7dSDmitry Mishin } 11023fdadf7dSDmitry Mishin 11033fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 11043fdadf7dSDmitry Mishin static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, 11053fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 11063fdadf7dSDmitry Mishin { 11073fdadf7dSDmitry Mishin switch (level) { 11083fdadf7dSDmitry Mishin case SOL_RAW: 11093fdadf7dSDmitry Mishin break; 11103fdadf7dSDmitry Mishin case SOL_ICMPV6: 11113fdadf7dSDmitry Mishin if (inet_sk(sk)->num != IPPROTO_ICMPV6) 11123fdadf7dSDmitry Mishin return -EOPNOTSUPP; 1113543d9cfeSArnaldo Carvalho de Melo return rawv6_geticmpfilter(sk, level, optname, optval, optlen); 11143fdadf7dSDmitry Mishin case SOL_IPV6: 11153fdadf7dSDmitry Mishin if (optname == IPV6_CHECKSUM) 11163fdadf7dSDmitry Mishin break; 11173fdadf7dSDmitry Mishin default: 1118543d9cfeSArnaldo Carvalho de Melo return compat_ipv6_getsockopt(sk, level, optname, 1119543d9cfeSArnaldo Carvalho de Melo optval, optlen); 11203ff50b79SStephen Hemminger } 11213fdadf7dSDmitry Mishin return do_rawv6_getsockopt(sk, level, optname, optval, optlen); 11223fdadf7dSDmitry Mishin } 11233fdadf7dSDmitry Mishin #endif 11243fdadf7dSDmitry Mishin 11251da177e4SLinus Torvalds static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) 11261da177e4SLinus Torvalds { 11271da177e4SLinus Torvalds switch(cmd) { 11281da177e4SLinus Torvalds case SIOCOUTQ: 11291da177e4SLinus Torvalds { 11301da177e4SLinus Torvalds int amount = atomic_read(&sk->sk_wmem_alloc); 11311da177e4SLinus Torvalds return put_user(amount, (int __user *)arg); 11321da177e4SLinus Torvalds } 11331da177e4SLinus Torvalds case SIOCINQ: 11341da177e4SLinus Torvalds { 11351da177e4SLinus Torvalds struct sk_buff *skb; 11361da177e4SLinus Torvalds int amount = 0; 11371da177e4SLinus Torvalds 1138e0f9f858SHerbert Xu spin_lock_bh(&sk->sk_receive_queue.lock); 11391da177e4SLinus Torvalds skb = skb_peek(&sk->sk_receive_queue); 11401da177e4SLinus Torvalds if (skb != NULL) 114127a884dcSArnaldo Carvalho de Melo amount = skb->tail - skb->transport_header; 1142e0f9f858SHerbert Xu spin_unlock_bh(&sk->sk_receive_queue.lock); 11431da177e4SLinus Torvalds return put_user(amount, (int __user *)arg); 11441da177e4SLinus Torvalds } 11451da177e4SLinus Torvalds 11461da177e4SLinus Torvalds default: 11471da177e4SLinus Torvalds return -ENOIOCTLCMD; 11481da177e4SLinus Torvalds } 11491da177e4SLinus Torvalds } 11501da177e4SLinus Torvalds 11511da177e4SLinus Torvalds static void rawv6_close(struct sock *sk, long timeout) 11521da177e4SLinus Torvalds { 11531da177e4SLinus Torvalds if (inet_sk(sk)->num == IPPROTO_RAW) 11541da177e4SLinus Torvalds ip6_ra_control(sk, -1, NULL); 11551da177e4SLinus Torvalds 11561da177e4SLinus Torvalds sk_common_release(sk); 11571da177e4SLinus Torvalds } 11581da177e4SLinus Torvalds 11591da177e4SLinus Torvalds static int rawv6_init_sk(struct sock *sk) 11601da177e4SLinus Torvalds { 11611da177e4SLinus Torvalds struct raw6_sock *rp = raw6_sk(sk); 1162f48d5ff1SMasahide NAKAMURA 1163f48d5ff1SMasahide NAKAMURA switch (inet_sk(sk)->num) { 1164f48d5ff1SMasahide NAKAMURA case IPPROTO_ICMPV6: 11651da177e4SLinus Torvalds rp->checksum = 1; 11661da177e4SLinus Torvalds rp->offset = 2; 1167f48d5ff1SMasahide NAKAMURA break; 1168f48d5ff1SMasahide NAKAMURA case IPPROTO_MH: 1169f48d5ff1SMasahide NAKAMURA rp->checksum = 1; 1170f48d5ff1SMasahide NAKAMURA rp->offset = 4; 1171f48d5ff1SMasahide NAKAMURA break; 1172f48d5ff1SMasahide NAKAMURA default: 1173f48d5ff1SMasahide NAKAMURA break; 11741da177e4SLinus Torvalds } 11751da177e4SLinus Torvalds return(0); 11761da177e4SLinus Torvalds } 11771da177e4SLinus Torvalds 1178c5a432f1SEric Dumazet DEFINE_PROTO_INUSE(rawv6) 1179c5a432f1SEric Dumazet 11801da177e4SLinus Torvalds struct proto rawv6_prot = { 11811da177e4SLinus Torvalds .name = "RAWv6", 11821da177e4SLinus Torvalds .owner = THIS_MODULE, 11831da177e4SLinus Torvalds .close = rawv6_close, 11841da177e4SLinus Torvalds .connect = ip6_datagram_connect, 11851da177e4SLinus Torvalds .disconnect = udp_disconnect, 11861da177e4SLinus Torvalds .ioctl = rawv6_ioctl, 11871da177e4SLinus Torvalds .init = rawv6_init_sk, 11881da177e4SLinus Torvalds .destroy = inet6_destroy_sock, 11891da177e4SLinus Torvalds .setsockopt = rawv6_setsockopt, 11901da177e4SLinus Torvalds .getsockopt = rawv6_getsockopt, 11911da177e4SLinus Torvalds .sendmsg = rawv6_sendmsg, 11921da177e4SLinus Torvalds .recvmsg = rawv6_recvmsg, 11931da177e4SLinus Torvalds .bind = rawv6_bind, 11941da177e4SLinus Torvalds .backlog_rcv = rawv6_rcv_skb, 11951da177e4SLinus Torvalds .hash = raw_v6_hash, 11961da177e4SLinus Torvalds .unhash = raw_v6_unhash, 11971da177e4SLinus Torvalds .obj_size = sizeof(struct raw6_sock), 1198543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 1199543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_rawv6_setsockopt, 1200543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_rawv6_getsockopt, 1201543d9cfeSArnaldo Carvalho de Melo #endif 1202c5a432f1SEric Dumazet REF_PROTO_INUSE(rawv6) 12031da177e4SLinus Torvalds }; 12041da177e4SLinus Torvalds 12051da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 12061da177e4SLinus Torvalds struct raw6_iter_state { 12071da177e4SLinus Torvalds int bucket; 12081da177e4SLinus Torvalds }; 12091da177e4SLinus Torvalds 12101da177e4SLinus Torvalds #define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private) 12111da177e4SLinus Torvalds 12121da177e4SLinus Torvalds static struct sock *raw6_get_first(struct seq_file *seq) 12131da177e4SLinus Torvalds { 12141da177e4SLinus Torvalds struct sock *sk; 12151da177e4SLinus Torvalds struct hlist_node *node; 12161da177e4SLinus Torvalds struct raw6_iter_state* state = raw6_seq_private(seq); 12171da177e4SLinus Torvalds 1218b673e4dfSPavel Emelyanov for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE; 1219b673e4dfSPavel Emelyanov ++state->bucket) 1220b673e4dfSPavel Emelyanov sk_for_each(sk, node, &raw_v6_hashinfo.ht[state->bucket]) 12211da177e4SLinus Torvalds if (sk->sk_family == PF_INET6) 12221da177e4SLinus Torvalds goto out; 12231da177e4SLinus Torvalds sk = NULL; 12241da177e4SLinus Torvalds out: 12251da177e4SLinus Torvalds return sk; 12261da177e4SLinus Torvalds } 12271da177e4SLinus Torvalds 12281da177e4SLinus Torvalds static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk) 12291da177e4SLinus Torvalds { 12301da177e4SLinus Torvalds struct raw6_iter_state* state = raw6_seq_private(seq); 12311da177e4SLinus Torvalds 12321da177e4SLinus Torvalds do { 12331da177e4SLinus Torvalds sk = sk_next(sk); 12341da177e4SLinus Torvalds try_again: 12351da177e4SLinus Torvalds ; 12361da177e4SLinus Torvalds } while (sk && sk->sk_family != PF_INET6); 12371da177e4SLinus Torvalds 1238b673e4dfSPavel Emelyanov if (!sk && ++state->bucket < RAW_HTABLE_SIZE) { 1239b673e4dfSPavel Emelyanov sk = sk_head(&raw_v6_hashinfo.ht[state->bucket]); 12401da177e4SLinus Torvalds goto try_again; 12411da177e4SLinus Torvalds } 12421da177e4SLinus Torvalds return sk; 12431da177e4SLinus Torvalds } 12441da177e4SLinus Torvalds 12451da177e4SLinus Torvalds static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos) 12461da177e4SLinus Torvalds { 12471da177e4SLinus Torvalds struct sock *sk = raw6_get_first(seq); 12481da177e4SLinus Torvalds if (sk) 12491da177e4SLinus Torvalds while (pos && (sk = raw6_get_next(seq, sk)) != NULL) 12501da177e4SLinus Torvalds --pos; 12511da177e4SLinus Torvalds return pos ? NULL : sk; 12521da177e4SLinus Torvalds } 12531da177e4SLinus Torvalds 12541da177e4SLinus Torvalds static void *raw6_seq_start(struct seq_file *seq, loff_t *pos) 12551da177e4SLinus Torvalds { 1256b673e4dfSPavel Emelyanov read_lock(&raw_v6_hashinfo.lock); 12571da177e4SLinus Torvalds return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; 12581da177e4SLinus Torvalds } 12591da177e4SLinus Torvalds 12601da177e4SLinus Torvalds static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos) 12611da177e4SLinus Torvalds { 12621da177e4SLinus Torvalds struct sock *sk; 12631da177e4SLinus Torvalds 12641da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 12651da177e4SLinus Torvalds sk = raw6_get_first(seq); 12661da177e4SLinus Torvalds else 12671da177e4SLinus Torvalds sk = raw6_get_next(seq, v); 12681da177e4SLinus Torvalds ++*pos; 12691da177e4SLinus Torvalds return sk; 12701da177e4SLinus Torvalds } 12711da177e4SLinus Torvalds 12721da177e4SLinus Torvalds static void raw6_seq_stop(struct seq_file *seq, void *v) 12731da177e4SLinus Torvalds { 1274b673e4dfSPavel Emelyanov read_unlock(&raw_v6_hashinfo.lock); 12751da177e4SLinus Torvalds } 12761da177e4SLinus Torvalds 12771da177e4SLinus Torvalds static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) 12781da177e4SLinus Torvalds { 12791da177e4SLinus Torvalds struct ipv6_pinfo *np = inet6_sk(sp); 12801da177e4SLinus Torvalds struct in6_addr *dest, *src; 12811da177e4SLinus Torvalds __u16 destp, srcp; 12821da177e4SLinus Torvalds 12831da177e4SLinus Torvalds dest = &np->daddr; 12841da177e4SLinus Torvalds src = &np->rcv_saddr; 12851da177e4SLinus Torvalds destp = 0; 12861da177e4SLinus Torvalds srcp = inet_sk(sp)->num; 12871da177e4SLinus Torvalds seq_printf(seq, 12881da177e4SLinus Torvalds "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " 1289a92aa318SWang Chen "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", 12901da177e4SLinus Torvalds i, 12911da177e4SLinus Torvalds src->s6_addr32[0], src->s6_addr32[1], 12921da177e4SLinus Torvalds src->s6_addr32[2], src->s6_addr32[3], srcp, 12931da177e4SLinus Torvalds dest->s6_addr32[0], dest->s6_addr32[1], 12941da177e4SLinus Torvalds dest->s6_addr32[2], dest->s6_addr32[3], destp, 12951da177e4SLinus Torvalds sp->sk_state, 12961da177e4SLinus Torvalds atomic_read(&sp->sk_wmem_alloc), 12971da177e4SLinus Torvalds atomic_read(&sp->sk_rmem_alloc), 12981da177e4SLinus Torvalds 0, 0L, 0, 12991da177e4SLinus Torvalds sock_i_uid(sp), 0, 13001da177e4SLinus Torvalds sock_i_ino(sp), 1301a92aa318SWang Chen atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); 13021da177e4SLinus Torvalds } 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds static int raw6_seq_show(struct seq_file *seq, void *v) 13051da177e4SLinus Torvalds { 13061da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 13071da177e4SLinus Torvalds seq_printf(seq, 13081da177e4SLinus Torvalds " sl " 13091da177e4SLinus Torvalds "local_address " 13101da177e4SLinus Torvalds "remote_address " 13111da177e4SLinus Torvalds "st tx_queue rx_queue tr tm->when retrnsmt" 1312a92aa318SWang Chen " uid timeout inode drops\n"); 13131da177e4SLinus Torvalds else 13141da177e4SLinus Torvalds raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket); 13151da177e4SLinus Torvalds return 0; 13161da177e4SLinus Torvalds } 13171da177e4SLinus Torvalds 131856b3d975SPhilippe De Muyter static const struct seq_operations raw6_seq_ops = { 13191da177e4SLinus Torvalds .start = raw6_seq_start, 13201da177e4SLinus Torvalds .next = raw6_seq_next, 13211da177e4SLinus Torvalds .stop = raw6_seq_stop, 13221da177e4SLinus Torvalds .show = raw6_seq_show, 13231da177e4SLinus Torvalds }; 13241da177e4SLinus Torvalds 13251da177e4SLinus Torvalds static int raw6_seq_open(struct inode *inode, struct file *file) 13261da177e4SLinus Torvalds { 1327cf7732e4SPavel Emelyanov return seq_open_private(file, &raw6_seq_ops, 1328cf7732e4SPavel Emelyanov sizeof(struct raw6_iter_state)); 13291da177e4SLinus Torvalds } 13301da177e4SLinus Torvalds 13319a32144eSArjan van de Ven static const struct file_operations raw6_seq_fops = { 13321da177e4SLinus Torvalds .owner = THIS_MODULE, 13331da177e4SLinus Torvalds .open = raw6_seq_open, 13341da177e4SLinus Torvalds .read = seq_read, 13351da177e4SLinus Torvalds .llseek = seq_lseek, 13361da177e4SLinus Torvalds .release = seq_release_private, 13371da177e4SLinus Torvalds }; 13381da177e4SLinus Torvalds 13391da177e4SLinus Torvalds int __init raw6_proc_init(void) 13401da177e4SLinus Torvalds { 1341457c4cbcSEric W. Biederman if (!proc_net_fops_create(&init_net, "raw6", S_IRUGO, &raw6_seq_fops)) 13421da177e4SLinus Torvalds return -ENOMEM; 13431da177e4SLinus Torvalds return 0; 13441da177e4SLinus Torvalds } 13451da177e4SLinus Torvalds 13461da177e4SLinus Torvalds void raw6_proc_exit(void) 13471da177e4SLinus Torvalds { 1348457c4cbcSEric W. Biederman proc_net_remove(&init_net, "raw6"); 13491da177e4SLinus Torvalds } 13501da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */ 1351