11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * INET An implementation of the TCP/IP protocol suite for the LINUX 31da177e4SLinus Torvalds * operating system. INET is implemented using the BSD Socket 41da177e4SLinus Torvalds * interface as the means of communication with the user level. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * RAW - implementation of IP "raw" sockets. 71da177e4SLinus Torvalds * 802c30a84SJesper Juhl * Authors: Ross Biro 91da177e4SLinus Torvalds * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds * Fixes: 121da177e4SLinus Torvalds * Alan Cox : verify_area() fixed up 131da177e4SLinus Torvalds * Alan Cox : ICMP error handling 141da177e4SLinus Torvalds * Alan Cox : EMSGSIZE if you send too big a packet 151da177e4SLinus Torvalds * Alan Cox : Now uses generic datagrams and shared 161da177e4SLinus Torvalds * skbuff library. No more peek crashes, 171da177e4SLinus Torvalds * no more backlogs 181da177e4SLinus Torvalds * Alan Cox : Checks sk->broadcast. 191da177e4SLinus Torvalds * Alan Cox : Uses skb_free_datagram/skb_copy_datagram 201da177e4SLinus Torvalds * Alan Cox : Raw passes ip options too 211da177e4SLinus Torvalds * Alan Cox : Setsocketopt added 221da177e4SLinus Torvalds * Alan Cox : Fixed error return for broadcasts 231da177e4SLinus Torvalds * Alan Cox : Removed wake_up calls 241da177e4SLinus Torvalds * Alan Cox : Use ttl/tos 251da177e4SLinus Torvalds * Alan Cox : Cleaned up old debugging 261da177e4SLinus Torvalds * Alan Cox : Use new kernel side addresses 271da177e4SLinus Torvalds * Arnt Gulbrandsen : Fixed MSG_DONTROUTE in raw sockets. 281da177e4SLinus Torvalds * Alan Cox : BSD style RAW socket demultiplexing. 291da177e4SLinus Torvalds * Alan Cox : Beginnings of mrouted support. 301da177e4SLinus Torvalds * Alan Cox : Added IP_HDRINCL option. 311da177e4SLinus Torvalds * Alan Cox : Skip broadcast check if BSDism set. 321da177e4SLinus Torvalds * David S. Miller : New socket lookup architecture. 331da177e4SLinus Torvalds * 341da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 351da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 361da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 371da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 381da177e4SLinus Torvalds */ 391da177e4SLinus Torvalds 40715b49efSAlan Cox #include <linux/types.h> 4160063497SArun Sharma #include <linux/atomic.h> 421da177e4SLinus Torvalds #include <asm/byteorder.h> 431da177e4SLinus Torvalds #include <asm/current.h> 441da177e4SLinus Torvalds #include <asm/uaccess.h> 451da177e4SLinus Torvalds #include <asm/ioctls.h> 461da177e4SLinus Torvalds #include <linux/stddef.h> 471da177e4SLinus Torvalds #include <linux/slab.h> 481da177e4SLinus Torvalds #include <linux/errno.h> 491da177e4SLinus Torvalds #include <linux/aio.h> 501da177e4SLinus Torvalds #include <linux/kernel.h> 51bc3b2d7fSPaul Gortmaker #include <linux/export.h> 521da177e4SLinus Torvalds #include <linux/spinlock.h> 531da177e4SLinus Torvalds #include <linux/sockios.h> 541da177e4SLinus Torvalds #include <linux/socket.h> 551da177e4SLinus Torvalds #include <linux/in.h> 561da177e4SLinus Torvalds #include <linux/mroute.h> 571da177e4SLinus Torvalds #include <linux/netdevice.h> 581da177e4SLinus Torvalds #include <linux/in_route.h> 591da177e4SLinus Torvalds #include <linux/route.h> 601da177e4SLinus Torvalds #include <linux/skbuff.h> 61f5220d63SQuentin Armitage #include <linux/igmp.h> 62457c4cbcSEric W. Biederman #include <net/net_namespace.h> 631da177e4SLinus Torvalds #include <net/dst.h> 641da177e4SLinus Torvalds #include <net/sock.h> 651da177e4SLinus Torvalds #include <linux/ip.h> 661da177e4SLinus Torvalds #include <linux/net.h> 671da177e4SLinus Torvalds #include <net/ip.h> 681da177e4SLinus Torvalds #include <net/icmp.h> 691da177e4SLinus Torvalds #include <net/udp.h> 701da177e4SLinus Torvalds #include <net/raw.h> 711da177e4SLinus Torvalds #include <net/snmp.h> 72c752f073SArnaldo Carvalho de Melo #include <net/tcp_states.h> 731da177e4SLinus Torvalds #include <net/inet_common.h> 741da177e4SLinus Torvalds #include <net/checksum.h> 751da177e4SLinus Torvalds #include <net/xfrm.h> 761da177e4SLinus Torvalds #include <linux/rtnetlink.h> 771da177e4SLinus Torvalds #include <linux/proc_fs.h> 781da177e4SLinus Torvalds #include <linux/seq_file.h> 791da177e4SLinus Torvalds #include <linux/netfilter.h> 801da177e4SLinus Torvalds #include <linux/netfilter_ipv4.h> 81709b46e8SEric W. Biederman #include <linux/compat.h> 821da177e4SLinus Torvalds 83b673e4dfSPavel Emelyanov static struct raw_hashinfo raw_v4_hashinfo = { 84938b93adSRobert P. J. Day .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock), 85b673e4dfSPavel Emelyanov }; 861da177e4SLinus Torvalds 87fc8717baSPavel Emelyanov void raw_hash_sk(struct sock *sk) 881da177e4SLinus Torvalds { 89fc8717baSPavel Emelyanov struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; 9065b4c50bSPavel Emelyanov struct hlist_head *head; 911da177e4SLinus Torvalds 92c720c7e8SEric Dumazet head = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)]; 9365b4c50bSPavel Emelyanov 9465b4c50bSPavel Emelyanov write_lock_bh(&h->lock); 951da177e4SLinus Torvalds sk_add_node(sk, head); 96c29a0bc4SPavel Emelyanov sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); 9765b4c50bSPavel Emelyanov write_unlock_bh(&h->lock); 9865b4c50bSPavel Emelyanov } 9965b4c50bSPavel Emelyanov EXPORT_SYMBOL_GPL(raw_hash_sk); 10065b4c50bSPavel Emelyanov 101fc8717baSPavel Emelyanov void raw_unhash_sk(struct sock *sk) 102ab70768eSPavel Emelyanov { 103fc8717baSPavel Emelyanov struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; 104fc8717baSPavel Emelyanov 105ab70768eSPavel Emelyanov write_lock_bh(&h->lock); 106ab70768eSPavel Emelyanov if (sk_del_node_init(sk)) 107c29a0bc4SPavel Emelyanov sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); 108ab70768eSPavel Emelyanov write_unlock_bh(&h->lock); 109ab70768eSPavel Emelyanov } 110ab70768eSPavel Emelyanov EXPORT_SYMBOL_GPL(raw_unhash_sk); 111ab70768eSPavel Emelyanov 112be185884SPavel Emelyanov static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk, 113be185884SPavel Emelyanov unsigned short num, __be32 raddr, __be32 laddr, int dif) 1141da177e4SLinus Torvalds { 115b67bfe0dSSasha Levin sk_for_each_from(sk) { 1161da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 1171da177e4SLinus Torvalds 118c720c7e8SEric Dumazet if (net_eq(sock_net(sk), net) && inet->inet_num == num && 119c720c7e8SEric Dumazet !(inet->inet_daddr && inet->inet_daddr != raddr) && 120c720c7e8SEric Dumazet !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) && 1211da177e4SLinus Torvalds !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)) 1221da177e4SLinus Torvalds goto found; /* gotcha */ 1231da177e4SLinus Torvalds } 1241da177e4SLinus Torvalds sk = NULL; 1251da177e4SLinus Torvalds found: 1261da177e4SLinus Torvalds return sk; 1271da177e4SLinus Torvalds } 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds /* 1301da177e4SLinus Torvalds * 0 - deliver 1311da177e4SLinus Torvalds * 1 - block 1321da177e4SLinus Torvalds */ 133ab43ed8bSEric Dumazet static int icmp_filter(const struct sock *sk, const struct sk_buff *skb) 1341da177e4SLinus Torvalds { 135ab43ed8bSEric Dumazet struct icmphdr _hdr; 136ab43ed8bSEric Dumazet const struct icmphdr *hdr; 1371da177e4SLinus Torvalds 138ab43ed8bSEric Dumazet hdr = skb_header_pointer(skb, skb_transport_offset(skb), 139ab43ed8bSEric Dumazet sizeof(_hdr), &_hdr); 140ab43ed8bSEric Dumazet if (!hdr) 1411da177e4SLinus Torvalds return 1; 1421da177e4SLinus Torvalds 143ab43ed8bSEric Dumazet if (hdr->type < 32) { 1441da177e4SLinus Torvalds __u32 data = raw_sk(sk)->filter.data; 1451da177e4SLinus Torvalds 146ab43ed8bSEric Dumazet return ((1U << hdr->type) & data) != 0; 1471da177e4SLinus Torvalds } 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds /* Do not block unknown ICMP types */ 1501da177e4SLinus Torvalds return 0; 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds /* IP input processing comes here for RAW socket delivery. 1541da177e4SLinus Torvalds * Caller owns SKB, so we must make clones. 1551da177e4SLinus Torvalds * 1561da177e4SLinus Torvalds * RFC 1122: SHOULD pass TOS value up to the transport layer. 1571da177e4SLinus Torvalds * -> It does. And not only TOS, but all IP header. 1581da177e4SLinus Torvalds */ 159b71d1d42SEric Dumazet static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash) 1601da177e4SLinus Torvalds { 1611da177e4SLinus Torvalds struct sock *sk; 1621da177e4SLinus Torvalds struct hlist_head *head; 163d13964f4SPatrick McHardy int delivered = 0; 164be185884SPavel Emelyanov struct net *net; 1651da177e4SLinus Torvalds 166b673e4dfSPavel Emelyanov read_lock(&raw_v4_hashinfo.lock); 167b673e4dfSPavel Emelyanov head = &raw_v4_hashinfo.ht[hash]; 1681da177e4SLinus Torvalds if (hlist_empty(head)) 1691da177e4SLinus Torvalds goto out; 170be185884SPavel Emelyanov 171c346dca1SYOSHIFUJI Hideaki net = dev_net(skb->dev); 172be185884SPavel Emelyanov sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol, 1731da177e4SLinus Torvalds iph->saddr, iph->daddr, 1741da177e4SLinus Torvalds skb->dev->ifindex); 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds while (sk) { 177d13964f4SPatrick McHardy delivered = 1; 178f5220d63SQuentin Armitage if ((iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) && 179f5220d63SQuentin Armitage ip_mc_sf_allow(sk, iph->daddr, iph->saddr, 180f5220d63SQuentin Armitage skb->dev->ifindex)) { 1811da177e4SLinus Torvalds struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds /* Not releasing hash table! */ 1841da177e4SLinus Torvalds if (clone) 1851da177e4SLinus Torvalds raw_rcv(sk, clone); 1861da177e4SLinus Torvalds } 187be185884SPavel Emelyanov sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol, 1881da177e4SLinus Torvalds iph->saddr, iph->daddr, 1891da177e4SLinus Torvalds skb->dev->ifindex); 1901da177e4SLinus Torvalds } 1911da177e4SLinus Torvalds out: 192b673e4dfSPavel Emelyanov read_unlock(&raw_v4_hashinfo.lock); 193d13964f4SPatrick McHardy return delivered; 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds 1967bc54c90SPavel Emelyanov int raw_local_deliver(struct sk_buff *skb, int protocol) 1977bc54c90SPavel Emelyanov { 1987bc54c90SPavel Emelyanov int hash; 1997bc54c90SPavel Emelyanov struct sock *raw_sk; 2007bc54c90SPavel Emelyanov 201b673e4dfSPavel Emelyanov hash = protocol & (RAW_HTABLE_SIZE - 1); 202b673e4dfSPavel Emelyanov raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); 2037bc54c90SPavel Emelyanov 2047bc54c90SPavel Emelyanov /* If there maybe a raw socket we must check - if not we 2057bc54c90SPavel Emelyanov * don't care less 2067bc54c90SPavel Emelyanov */ 2077bc54c90SPavel Emelyanov if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash)) 2087bc54c90SPavel Emelyanov raw_sk = NULL; 2097bc54c90SPavel Emelyanov 2107bc54c90SPavel Emelyanov return raw_sk != NULL; 2117bc54c90SPavel Emelyanov 2127bc54c90SPavel Emelyanov } 2137bc54c90SPavel Emelyanov 2147bc54c90SPavel Emelyanov static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info) 2151da177e4SLinus Torvalds { 2161da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 21788c7664fSArnaldo Carvalho de Melo const int type = icmp_hdr(skb)->type; 21888c7664fSArnaldo Carvalho de Melo const int code = icmp_hdr(skb)->code; 2191da177e4SLinus Torvalds int err = 0; 2201da177e4SLinus Torvalds int harderr = 0; 2211da177e4SLinus Torvalds 22236393395SDavid S. Miller if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) 22336393395SDavid S. Miller ipv4_sk_update_pmtu(skb, sk, info); 2248d65b119SDuan Jiong else if (type == ICMP_REDIRECT) { 22555be7a9cSDavid S. Miller ipv4_sk_redirect(skb, sk); 2268d65b119SDuan Jiong return; 2278d65b119SDuan Jiong } 22836393395SDavid S. Miller 2291da177e4SLinus Torvalds /* Report error on raw socket, if: 2301da177e4SLinus Torvalds 1. User requested ip_recverr. 2311da177e4SLinus Torvalds 2. Socket is connected (otherwise the error indication 2321da177e4SLinus Torvalds is useless without ip_recverr and error is hard. 2331da177e4SLinus Torvalds */ 2341da177e4SLinus Torvalds if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED) 2351da177e4SLinus Torvalds return; 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds switch (type) { 2381da177e4SLinus Torvalds default: 2391da177e4SLinus Torvalds case ICMP_TIME_EXCEEDED: 2401da177e4SLinus Torvalds err = EHOSTUNREACH; 2411da177e4SLinus Torvalds break; 2421da177e4SLinus Torvalds case ICMP_SOURCE_QUENCH: 2431da177e4SLinus Torvalds return; 2441da177e4SLinus Torvalds case ICMP_PARAMETERPROB: 2451da177e4SLinus Torvalds err = EPROTO; 2461da177e4SLinus Torvalds harderr = 1; 2471da177e4SLinus Torvalds break; 2481da177e4SLinus Torvalds case ICMP_DEST_UNREACH: 2491da177e4SLinus Torvalds err = EHOSTUNREACH; 2501da177e4SLinus Torvalds if (code > NR_ICMP_UNREACH) 2511da177e4SLinus Torvalds break; 2521da177e4SLinus Torvalds err = icmp_err_convert[code].errno; 2531da177e4SLinus Torvalds harderr = icmp_err_convert[code].fatal; 2541da177e4SLinus Torvalds if (code == ICMP_FRAG_NEEDED) { 2551da177e4SLinus Torvalds harderr = inet->pmtudisc != IP_PMTUDISC_DONT; 2561da177e4SLinus Torvalds err = EMSGSIZE; 2571da177e4SLinus Torvalds } 2581da177e4SLinus Torvalds } 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds if (inet->recverr) { 261b71d1d42SEric Dumazet const struct iphdr *iph = (const struct iphdr *)skb->data; 2621da177e4SLinus Torvalds u8 *payload = skb->data + (iph->ihl << 2); 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds if (inet->hdrincl) 2651da177e4SLinus Torvalds payload = skb->data; 2661da177e4SLinus Torvalds ip_icmp_error(sk, skb, err, 0, info, payload); 2671da177e4SLinus Torvalds } 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds if (inet->recverr || harderr) { 2701da177e4SLinus Torvalds sk->sk_err = err; 2711da177e4SLinus Torvalds sk->sk_error_report(sk); 2721da177e4SLinus Torvalds } 2731da177e4SLinus Torvalds } 2741da177e4SLinus Torvalds 2757bc54c90SPavel Emelyanov void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info) 2767bc54c90SPavel Emelyanov { 2777bc54c90SPavel Emelyanov int hash; 2787bc54c90SPavel Emelyanov struct sock *raw_sk; 279b71d1d42SEric Dumazet const struct iphdr *iph; 280be185884SPavel Emelyanov struct net *net; 2817bc54c90SPavel Emelyanov 282b673e4dfSPavel Emelyanov hash = protocol & (RAW_HTABLE_SIZE - 1); 2837bc54c90SPavel Emelyanov 284b673e4dfSPavel Emelyanov read_lock(&raw_v4_hashinfo.lock); 285b673e4dfSPavel Emelyanov raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); 2867bc54c90SPavel Emelyanov if (raw_sk != NULL) { 287b71d1d42SEric Dumazet iph = (const struct iphdr *)skb->data; 288c346dca1SYOSHIFUJI Hideaki net = dev_net(skb->dev); 289be185884SPavel Emelyanov 290be185884SPavel Emelyanov while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol, 291be185884SPavel Emelyanov iph->daddr, iph->saddr, 2927bc54c90SPavel Emelyanov skb->dev->ifindex)) != NULL) { 2937bc54c90SPavel Emelyanov raw_err(raw_sk, skb, info); 2947bc54c90SPavel Emelyanov raw_sk = sk_next(raw_sk); 295b71d1d42SEric Dumazet iph = (const struct iphdr *)skb->data; 2967bc54c90SPavel Emelyanov } 2977bc54c90SPavel Emelyanov } 298b673e4dfSPavel Emelyanov read_unlock(&raw_v4_hashinfo.lock); 2997bc54c90SPavel Emelyanov } 3007bc54c90SPavel Emelyanov 3011da177e4SLinus Torvalds static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb) 3021da177e4SLinus Torvalds { 3031da177e4SLinus Torvalds /* Charge it to the socket. */ 3041da177e4SLinus Torvalds 305fbf8866dSShawn Bohrer ipv4_pktinfo_prepare(sk, skb); 306d826eb14SEric Dumazet if (sock_queue_rcv_skb(sk, skb) < 0) { 3071da177e4SLinus Torvalds kfree_skb(skb); 3081da177e4SLinus Torvalds return NET_RX_DROP; 3091da177e4SLinus Torvalds } 3101da177e4SLinus Torvalds 3111da177e4SLinus Torvalds return NET_RX_SUCCESS; 3121da177e4SLinus Torvalds } 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds int raw_rcv(struct sock *sk, struct sk_buff *skb) 3151da177e4SLinus Torvalds { 3161da177e4SLinus Torvalds if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) { 31733c732c3SWang Chen atomic_inc(&sk->sk_drops); 3181da177e4SLinus Torvalds kfree_skb(skb); 3191da177e4SLinus Torvalds return NET_RX_DROP; 3201da177e4SLinus Torvalds } 321b59c2701SPatrick McHardy nf_reset(skb); 3221da177e4SLinus Torvalds 323d56f90a7SArnaldo Carvalho de Melo skb_push(skb, skb->data - skb_network_header(skb)); 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds raw_rcv_skb(sk, skb); 3261da177e4SLinus Torvalds return 0; 3271da177e4SLinus Torvalds } 3281da177e4SLinus Torvalds 32977968b78SDavid S. Miller static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4, 33077968b78SDavid S. Miller void *from, size_t length, 3311789a640SEric Dumazet struct rtable **rtp, 3321da177e4SLinus Torvalds unsigned int flags) 3331da177e4SLinus Torvalds { 3341da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 3350388b004SPavel Emelyanov struct net *net = sock_net(sk); 3361da177e4SLinus Torvalds struct iphdr *iph; 3371da177e4SLinus Torvalds struct sk_buff *skb; 338f844c74fSHerbert Xu unsigned int iphlen; 3391da177e4SLinus Torvalds int err; 3401789a640SEric Dumazet struct rtable *rt = *rtp; 34166088243SHerbert Xu int hlen, tlen; 3421da177e4SLinus Torvalds 343d8d1f30bSChangli Gao if (length > rt->dst.dev->mtu) { 34477968b78SDavid S. Miller ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, 345d8d1f30bSChangli Gao rt->dst.dev->mtu); 3461da177e4SLinus Torvalds return -EMSGSIZE; 3471da177e4SLinus Torvalds } 3481da177e4SLinus Torvalds if (flags&MSG_PROBE) 3491da177e4SLinus Torvalds goto out; 3501da177e4SLinus Torvalds 35166088243SHerbert Xu hlen = LL_RESERVED_SPACE(rt->dst.dev); 35266088243SHerbert Xu tlen = rt->dst.dev->needed_tailroom; 353f5184d26SJohannes Berg skb = sock_alloc_send_skb(sk, 35466088243SHerbert Xu length + hlen + tlen + 15, 3551da177e4SLinus Torvalds flags & MSG_DONTWAIT, &err); 3561da177e4SLinus Torvalds if (skb == NULL) 3571da177e4SLinus Torvalds goto error; 35866088243SHerbert Xu skb_reserve(skb, hlen); 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds skb->priority = sk->sk_priority; 3614a19ec58SLaszlo Attila Toth skb->mark = sk->sk_mark; 362d8d1f30bSChangli Gao skb_dst_set(skb, &rt->dst); 3631789a640SEric Dumazet *rtp = NULL; 3641da177e4SLinus Torvalds 3657e28ecc2SArnaldo Carvalho de Melo skb_reset_network_header(skb); 366eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 3677e28ecc2SArnaldo Carvalho de Melo skb_put(skb, length); 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds skb->ip_summed = CHECKSUM_NONE; 3701da177e4SLinus Torvalds 37111878b40SWillem de Bruijn sock_tx_timestamp(sk, &skb_shinfo(skb)->tx_flags); 37211878b40SWillem de Bruijn 373b0e380b1SArnaldo Carvalho de Melo skb->transport_header = skb->network_header; 37455888dfbSNeil Horman err = -EFAULT; 37555888dfbSNeil Horman if (memcpy_fromiovecend((void *)iph, from, 0, length)) 37655888dfbSNeil Horman goto error_free; 3771da177e4SLinus Torvalds 378f844c74fSHerbert Xu iphlen = iph->ihl * 4; 37955888dfbSNeil Horman 38055888dfbSNeil Horman /* 38155888dfbSNeil Horman * We don't want to modify the ip header, but we do need to 38255888dfbSNeil Horman * be sure that it won't cause problems later along the network 38355888dfbSNeil Horman * stack. Specifically we want to make sure that iph->ihl is a 38455888dfbSNeil Horman * sane value. If ihl points beyond the length of the buffer passed 38555888dfbSNeil Horman * in, reject the frame as invalid 38655888dfbSNeil Horman */ 38755888dfbSNeil Horman err = -EINVAL; 38855888dfbSNeil Horman if (iphlen > length) 38955888dfbSNeil Horman goto error_free; 39055888dfbSNeil Horman 39155888dfbSNeil Horman if (iphlen >= sizeof(*iph)) { 3921da177e4SLinus Torvalds if (!iph->saddr) 39377968b78SDavid S. Miller iph->saddr = fl4->saddr; 3941da177e4SLinus Torvalds iph->check = 0; 3951da177e4SLinus Torvalds iph->tot_len = htons(length); 3961da177e4SLinus Torvalds if (!iph->id) 39773f156a6SEric Dumazet ip_select_ident(skb, NULL); 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 4001da177e4SLinus Torvalds } 40196793b48SDavid L Stevens if (iph->protocol == IPPROTO_ICMP) 4020388b004SPavel Emelyanov icmp_out_count(net, ((struct icmphdr *) 40396793b48SDavid L Stevens skb_transport_header(skb))->type); 4041da177e4SLinus Torvalds 4059bbc768aSJan Engelhardt err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, skb, NULL, 406d8d1f30bSChangli Gao rt->dst.dev, dst_output); 4071da177e4SLinus Torvalds if (err > 0) 4086ce9e7b5SEric Dumazet err = net_xmit_errno(err); 4091da177e4SLinus Torvalds if (err) 4101da177e4SLinus Torvalds goto error; 4111da177e4SLinus Torvalds out: 4121da177e4SLinus Torvalds return 0; 4131da177e4SLinus Torvalds 41455888dfbSNeil Horman error_free: 4151da177e4SLinus Torvalds kfree_skb(skb); 4161da177e4SLinus Torvalds error: 4175e38e270SPavel Emelyanov IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS); 4186ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet->recverr) 4196ce9e7b5SEric Dumazet err = 0; 4201da177e4SLinus Torvalds return err; 4211da177e4SLinus Torvalds } 4221da177e4SLinus Torvalds 4239d6ec938SDavid S. Miller static int raw_probe_proto_opt(struct flowi4 *fl4, struct msghdr *msg) 4241da177e4SLinus Torvalds { 425*32b5913aSHerbert Xu struct icmphdr icmph; 426*32b5913aSHerbert Xu int err; 4271da177e4SLinus Torvalds 428*32b5913aSHerbert Xu if (fl4->flowi4_proto != IPPROTO_ICMP) 429a27b58feSHeiko Carstens return 0; 4301da177e4SLinus Torvalds 431*32b5913aSHerbert Xu /* We only need the first two bytes. */ 432*32b5913aSHerbert Xu err = memcpy_fromiovecend((void *)&icmph, msg->msg_iov, 0, 2); 433*32b5913aSHerbert Xu if (err) 434*32b5913aSHerbert Xu return err; 4351da177e4SLinus Torvalds 436*32b5913aSHerbert Xu fl4->fl4_icmp_type = icmph.type; 437*32b5913aSHerbert Xu fl4->fl4_icmp_code = icmph.code; 4381da177e4SLinus Torvalds 439a27b58feSHeiko Carstens return 0; 4401da177e4SLinus Torvalds } 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, 4431da177e4SLinus Torvalds size_t len) 4441da177e4SLinus Torvalds { 4451da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 4461da177e4SLinus Torvalds struct ipcm_cookie ipc; 4471da177e4SLinus Torvalds struct rtable *rt = NULL; 44877968b78SDavid S. Miller struct flowi4 fl4; 4491da177e4SLinus Torvalds int free = 0; 4503ca3c68eSAl Viro __be32 daddr; 451c1d18f9fSAl Viro __be32 saddr; 4521da177e4SLinus Torvalds u8 tos; 4531da177e4SLinus Torvalds int err; 454f6d8bd05SEric Dumazet struct ip_options_data opt_copy; 4551da177e4SLinus Torvalds 4561da177e4SLinus Torvalds err = -EMSGSIZE; 457926d4b81SJesper Juhl if (len > 0xFFFF) 4581da177e4SLinus Torvalds goto out; 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds /* 4611da177e4SLinus Torvalds * Check the flags. 4621da177e4SLinus Torvalds */ 4631da177e4SLinus Torvalds 4641da177e4SLinus Torvalds err = -EOPNOTSUPP; 4651da177e4SLinus Torvalds if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */ 4661da177e4SLinus Torvalds goto out; /* compatibility */ 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds /* 4691da177e4SLinus Torvalds * Get and verify the address. 4701da177e4SLinus Torvalds */ 4711da177e4SLinus Torvalds 4721da177e4SLinus Torvalds if (msg->msg_namelen) { 473342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in *, usin, msg->msg_name); 4741da177e4SLinus Torvalds err = -EINVAL; 4751da177e4SLinus Torvalds if (msg->msg_namelen < sizeof(*usin)) 4761da177e4SLinus Torvalds goto out; 4771da177e4SLinus Torvalds if (usin->sin_family != AF_INET) { 478058bd4d2SJoe Perches pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n", 479058bd4d2SJoe Perches __func__, current->comm); 4801da177e4SLinus Torvalds err = -EAFNOSUPPORT; 4811da177e4SLinus Torvalds if (usin->sin_family) 4821da177e4SLinus Torvalds goto out; 4831da177e4SLinus Torvalds } 4841da177e4SLinus Torvalds daddr = usin->sin_addr.s_addr; 4851da177e4SLinus Torvalds /* ANK: I did not forget to get protocol from port field. 4861da177e4SLinus Torvalds * I just do not know, who uses this weirdness. 4871da177e4SLinus Torvalds * IP_HDRINCL is much more convenient. 4881da177e4SLinus Torvalds */ 4891da177e4SLinus Torvalds } else { 4901da177e4SLinus Torvalds err = -EDESTADDRREQ; 4911da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 4921da177e4SLinus Torvalds goto out; 493c720c7e8SEric Dumazet daddr = inet->inet_daddr; 4941da177e4SLinus Torvalds } 4951da177e4SLinus Torvalds 496c720c7e8SEric Dumazet ipc.addr = inet->inet_saddr; 4971da177e4SLinus Torvalds ipc.opt = NULL; 4982244d07bSOliver Hartkopp ipc.tx_flags = 0; 499aa661581SFrancesco Fusco ipc.ttl = 0; 500aa661581SFrancesco Fusco ipc.tos = -1; 5011da177e4SLinus Torvalds ipc.oif = sk->sk_bound_dev_if; 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds if (msg->msg_controllen) { 504c8e6ad08SHannes Frederic Sowa err = ip_cmsg_send(sock_net(sk), msg, &ipc, false); 5051da177e4SLinus Torvalds if (err) 5061da177e4SLinus Torvalds goto out; 5071da177e4SLinus Torvalds if (ipc.opt) 5081da177e4SLinus Torvalds free = 1; 5091da177e4SLinus Torvalds } 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds saddr = ipc.addr; 5121da177e4SLinus Torvalds ipc.addr = daddr; 5131da177e4SLinus Torvalds 514f6d8bd05SEric Dumazet if (!ipc.opt) { 515f6d8bd05SEric Dumazet struct ip_options_rcu *inet_opt; 516f6d8bd05SEric Dumazet 517f6d8bd05SEric Dumazet rcu_read_lock(); 518f6d8bd05SEric Dumazet inet_opt = rcu_dereference(inet->inet_opt); 519f6d8bd05SEric Dumazet if (inet_opt) { 520f6d8bd05SEric Dumazet memcpy(&opt_copy, inet_opt, 521f6d8bd05SEric Dumazet sizeof(*inet_opt) + inet_opt->opt.optlen); 522f6d8bd05SEric Dumazet ipc.opt = &opt_copy.opt; 523f6d8bd05SEric Dumazet } 524f6d8bd05SEric Dumazet rcu_read_unlock(); 525f6d8bd05SEric Dumazet } 5261da177e4SLinus Torvalds 5271da177e4SLinus Torvalds if (ipc.opt) { 5281da177e4SLinus Torvalds err = -EINVAL; 5291da177e4SLinus Torvalds /* Linux does not mangle headers on raw sockets, 5301da177e4SLinus Torvalds * so that IP options + IP_HDRINCL is non-sense. 5311da177e4SLinus Torvalds */ 5321da177e4SLinus Torvalds if (inet->hdrincl) 5331da177e4SLinus Torvalds goto done; 534f6d8bd05SEric Dumazet if (ipc.opt->opt.srr) { 5351da177e4SLinus Torvalds if (!daddr) 5361da177e4SLinus Torvalds goto done; 537f6d8bd05SEric Dumazet daddr = ipc.opt->opt.faddr; 5381da177e4SLinus Torvalds } 5391da177e4SLinus Torvalds } 540aa661581SFrancesco Fusco tos = get_rtconn_flags(&ipc, sk); 5411da177e4SLinus Torvalds if (msg->msg_flags & MSG_DONTROUTE) 5421da177e4SLinus Torvalds tos |= RTO_ONLINK; 5431da177e4SLinus Torvalds 544f97c1e0cSJoe Perches if (ipv4_is_multicast(daddr)) { 5451da177e4SLinus Torvalds if (!ipc.oif) 5461da177e4SLinus Torvalds ipc.oif = inet->mc_index; 5471da177e4SLinus Torvalds if (!saddr) 5481da177e4SLinus Torvalds saddr = inet->mc_addr; 54976e21053SErich E. Hoover } else if (!ipc.oif) 55076e21053SErich E. Hoover ipc.oif = inet->uc_index; 5511da177e4SLinus Torvalds 552ef164ae3SDavid S. Miller flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos, 553ef164ae3SDavid S. Miller RT_SCOPE_UNIVERSE, 554ef164ae3SDavid S. Miller inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol, 5550e0d44abSSteffen Klassert inet_sk_flowi_flags(sk) | 556c27c9322SChris Clark (inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0), 55747670b76SJulian Anastasov daddr, saddr, 0, 0); 558ef164ae3SDavid S. Miller 559a27b58feSHeiko Carstens if (!inet->hdrincl) { 5609d6ec938SDavid S. Miller err = raw_probe_proto_opt(&fl4, msg); 561a27b58feSHeiko Carstens if (err) 562a27b58feSHeiko Carstens goto done; 563a27b58feSHeiko Carstens } 5641da177e4SLinus Torvalds 5659d6ec938SDavid S. Miller security_sk_classify_flow(sk, flowi4_to_flowi(&fl4)); 5669d6ec938SDavid S. Miller rt = ip_route_output_flow(sock_net(sk), &fl4, sk); 567b23dd4feSDavid S. Miller if (IS_ERR(rt)) { 568b23dd4feSDavid S. Miller err = PTR_ERR(rt); 5694910ac6cSDavid S. Miller rt = NULL; 5701da177e4SLinus Torvalds goto done; 571b23dd4feSDavid S. Miller } 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds err = -EACCES; 5741da177e4SLinus Torvalds if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST)) 5751da177e4SLinus Torvalds goto done; 5761da177e4SLinus Torvalds 5771da177e4SLinus Torvalds if (msg->msg_flags & MSG_CONFIRM) 5781da177e4SLinus Torvalds goto do_confirm; 5791da177e4SLinus Torvalds back_from_confirm: 5801da177e4SLinus Torvalds 5811da177e4SLinus Torvalds if (inet->hdrincl) 58277968b78SDavid S. Miller err = raw_send_hdrinc(sk, &fl4, msg->msg_iov, len, 5831789a640SEric Dumazet &rt, msg->msg_flags); 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds else { 58611878b40SWillem de Bruijn sock_tx_timestamp(sk, &ipc.tx_flags); 58711878b40SWillem de Bruijn 5881da177e4SLinus Torvalds if (!ipc.addr) 58977968b78SDavid S. Miller ipc.addr = fl4.daddr; 5901da177e4SLinus Torvalds lock_sock(sk); 591f5fca608SDavid S. Miller err = ip_append_data(sk, &fl4, ip_generic_getfrag, 59277968b78SDavid S. Miller msg->msg_iov, len, 0, 5932e77d89bSEric Dumazet &ipc, &rt, msg->msg_flags); 5941da177e4SLinus Torvalds if (err) 5951da177e4SLinus Torvalds ip_flush_pending_frames(sk); 5966ce9e7b5SEric Dumazet else if (!(msg->msg_flags & MSG_MORE)) { 59777968b78SDavid S. Miller err = ip_push_pending_frames(sk, &fl4); 5986ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet->recverr) 5996ce9e7b5SEric Dumazet err = 0; 6006ce9e7b5SEric Dumazet } 6011da177e4SLinus Torvalds release_sock(sk); 6021da177e4SLinus Torvalds } 6031da177e4SLinus Torvalds done: 6041da177e4SLinus Torvalds if (free) 6051da177e4SLinus Torvalds kfree(ipc.opt); 6061da177e4SLinus Torvalds ip_rt_put(rt); 6071da177e4SLinus Torvalds 6085418c692SJesper Juhl out: 6095418c692SJesper Juhl if (err < 0) 6105418c692SJesper Juhl return err; 6115418c692SJesper Juhl return len; 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds do_confirm: 614d8d1f30bSChangli Gao dst_confirm(&rt->dst); 6151da177e4SLinus Torvalds if (!(msg->msg_flags & MSG_PROBE) || len) 6161da177e4SLinus Torvalds goto back_from_confirm; 6171da177e4SLinus Torvalds err = 0; 6181da177e4SLinus Torvalds goto done; 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds static void raw_close(struct sock *sk, long timeout) 6221da177e4SLinus Torvalds { 6231da177e4SLinus Torvalds /* 62425985edcSLucas De Marchi * Raw sockets may have direct kernel references. Kill them. 6251da177e4SLinus Torvalds */ 6261da177e4SLinus Torvalds ip_ra_control(sk, 0, NULL); 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds sk_common_release(sk); 6291da177e4SLinus Torvalds } 6301da177e4SLinus Torvalds 6317d06b2e0SBrian Haley static void raw_destroy(struct sock *sk) 63222dd4850SDenis V. Lunev { 63322dd4850SDenis V. Lunev lock_sock(sk); 63422dd4850SDenis V. Lunev ip_flush_pending_frames(sk); 63522dd4850SDenis V. Lunev release_sock(sk); 63622dd4850SDenis V. Lunev } 63722dd4850SDenis V. Lunev 6381da177e4SLinus Torvalds /* This gets rid of all the nasties in af_inet. -DaveM */ 6391da177e4SLinus Torvalds static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) 6401da177e4SLinus Torvalds { 6411da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 6421da177e4SLinus Torvalds struct sockaddr_in *addr = (struct sockaddr_in *) uaddr; 6431da177e4SLinus Torvalds int ret = -EINVAL; 6441da177e4SLinus Torvalds int chk_addr_ret; 6451da177e4SLinus Torvalds 6461da177e4SLinus Torvalds if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in)) 6471da177e4SLinus Torvalds goto out; 6483b1e0a65SYOSHIFUJI Hideaki chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr); 6491da177e4SLinus Torvalds ret = -EADDRNOTAVAIL; 6501da177e4SLinus Torvalds if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL && 6511da177e4SLinus Torvalds chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST) 6521da177e4SLinus Torvalds goto out; 653c720c7e8SEric Dumazet inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; 6541da177e4SLinus Torvalds if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) 655c720c7e8SEric Dumazet inet->inet_saddr = 0; /* Use device */ 6561da177e4SLinus Torvalds sk_dst_reset(sk); 6571da177e4SLinus Torvalds ret = 0; 6581da177e4SLinus Torvalds out: return ret; 6591da177e4SLinus Torvalds } 6601da177e4SLinus Torvalds 6611da177e4SLinus Torvalds /* 6621da177e4SLinus Torvalds * This should be easy, if there is something there 6631da177e4SLinus Torvalds * we return it, otherwise we block. 6641da177e4SLinus Torvalds */ 6651da177e4SLinus Torvalds 6661da177e4SLinus Torvalds static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, 6671da177e4SLinus Torvalds size_t len, int noblock, int flags, int *addr_len) 6681da177e4SLinus Torvalds { 6691da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 6701da177e4SLinus Torvalds size_t copied = 0; 6711da177e4SLinus Torvalds int err = -EOPNOTSUPP; 672342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name); 6731da177e4SLinus Torvalds struct sk_buff *skb; 6741da177e4SLinus Torvalds 6751da177e4SLinus Torvalds if (flags & MSG_OOB) 6761da177e4SLinus Torvalds goto out; 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds if (flags & MSG_ERRQUEUE) { 67985fbaa75SHannes Frederic Sowa err = ip_recv_error(sk, msg, len, addr_len); 6801da177e4SLinus Torvalds goto out; 6811da177e4SLinus Torvalds } 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds skb = skb_recv_datagram(sk, flags, noblock, &err); 6841da177e4SLinus Torvalds if (!skb) 6851da177e4SLinus Torvalds goto out; 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds copied = skb->len; 6881da177e4SLinus Torvalds if (len < copied) { 6891da177e4SLinus Torvalds msg->msg_flags |= MSG_TRUNC; 6901da177e4SLinus Torvalds copied = len; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds 69351f3d02bSDavid S. Miller err = skb_copy_datagram_msg(skb, 0, msg, copied); 6941da177e4SLinus Torvalds if (err) 6951da177e4SLinus Torvalds goto done; 6961da177e4SLinus Torvalds 6973b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvalds /* Copy the address. */ 7001da177e4SLinus Torvalds if (sin) { 7011da177e4SLinus Torvalds sin->sin_family = AF_INET; 702eddc9ec5SArnaldo Carvalho de Melo sin->sin_addr.s_addr = ip_hdr(skb)->saddr; 703f59fc7f3STetsuo Handa sin->sin_port = 0; 7041da177e4SLinus Torvalds memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 705bceaa902SHannes Frederic Sowa *addr_len = sizeof(*sin); 7061da177e4SLinus Torvalds } 7071da177e4SLinus Torvalds if (inet->cmsg_flags) 7081da177e4SLinus Torvalds ip_cmsg_recv(msg, skb); 7091da177e4SLinus Torvalds if (flags & MSG_TRUNC) 7101da177e4SLinus Torvalds copied = skb->len; 7111da177e4SLinus Torvalds done: 7121da177e4SLinus Torvalds skb_free_datagram(sk, skb); 7135418c692SJesper Juhl out: 7145418c692SJesper Juhl if (err) 7155418c692SJesper Juhl return err; 7165418c692SJesper Juhl return copied; 7171da177e4SLinus Torvalds } 7181da177e4SLinus Torvalds 7191da177e4SLinus Torvalds static int raw_init(struct sock *sk) 7201da177e4SLinus Torvalds { 7211da177e4SLinus Torvalds struct raw_sock *rp = raw_sk(sk); 7221da177e4SLinus Torvalds 723c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num == IPPROTO_ICMP) 7241da177e4SLinus Torvalds memset(&rp->filter, 0, sizeof(rp->filter)); 7251da177e4SLinus Torvalds return 0; 7261da177e4SLinus Torvalds } 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen) 7291da177e4SLinus Torvalds { 7301da177e4SLinus Torvalds if (optlen > sizeof(struct icmp_filter)) 7311da177e4SLinus Torvalds optlen = sizeof(struct icmp_filter); 7321da177e4SLinus Torvalds if (copy_from_user(&raw_sk(sk)->filter, optval, optlen)) 7331da177e4SLinus Torvalds return -EFAULT; 7341da177e4SLinus Torvalds return 0; 7351da177e4SLinus Torvalds } 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen) 7381da177e4SLinus Torvalds { 7391da177e4SLinus Torvalds int len, ret = -EFAULT; 7401da177e4SLinus Torvalds 7411da177e4SLinus Torvalds if (get_user(len, optlen)) 7421da177e4SLinus Torvalds goto out; 7431da177e4SLinus Torvalds ret = -EINVAL; 7441da177e4SLinus Torvalds if (len < 0) 7451da177e4SLinus Torvalds goto out; 7461da177e4SLinus Torvalds if (len > sizeof(struct icmp_filter)) 7471da177e4SLinus Torvalds len = sizeof(struct icmp_filter); 7481da177e4SLinus Torvalds ret = -EFAULT; 7491da177e4SLinus Torvalds if (put_user(len, optlen) || 7501da177e4SLinus Torvalds copy_to_user(optval, &raw_sk(sk)->filter, len)) 7511da177e4SLinus Torvalds goto out; 7521da177e4SLinus Torvalds ret = 0; 7531da177e4SLinus Torvalds out: return ret; 7541da177e4SLinus Torvalds } 7551da177e4SLinus Torvalds 7563fdadf7dSDmitry Mishin static int do_raw_setsockopt(struct sock *sk, int level, int optname, 757b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 7581da177e4SLinus Torvalds { 7591da177e4SLinus Torvalds if (optname == ICMP_FILTER) { 760c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMP) 7611da177e4SLinus Torvalds return -EOPNOTSUPP; 7621da177e4SLinus Torvalds else 7631da177e4SLinus Torvalds return raw_seticmpfilter(sk, optval, optlen); 7641da177e4SLinus Torvalds } 7651da177e4SLinus Torvalds return -ENOPROTOOPT; 7661da177e4SLinus Torvalds } 7671da177e4SLinus Torvalds 7683fdadf7dSDmitry Mishin static int raw_setsockopt(struct sock *sk, int level, int optname, 769b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 7701da177e4SLinus Torvalds { 7711da177e4SLinus Torvalds if (level != SOL_RAW) 7723fdadf7dSDmitry Mishin return ip_setsockopt(sk, level, optname, optval, optlen); 7733fdadf7dSDmitry Mishin return do_raw_setsockopt(sk, level, optname, optval, optlen); 7743fdadf7dSDmitry Mishin } 7751da177e4SLinus Torvalds 7763fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 7773fdadf7dSDmitry Mishin static int compat_raw_setsockopt(struct sock *sk, int level, int optname, 778b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 7793fdadf7dSDmitry Mishin { 7803fdadf7dSDmitry Mishin if (level != SOL_RAW) 781543d9cfeSArnaldo Carvalho de Melo return compat_ip_setsockopt(sk, level, optname, optval, optlen); 7823fdadf7dSDmitry Mishin return do_raw_setsockopt(sk, level, optname, optval, optlen); 7833fdadf7dSDmitry Mishin } 7843fdadf7dSDmitry Mishin #endif 7853fdadf7dSDmitry Mishin 7863fdadf7dSDmitry Mishin static int do_raw_getsockopt(struct sock *sk, int level, int optname, 7873fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 7883fdadf7dSDmitry Mishin { 7891da177e4SLinus Torvalds if (optname == ICMP_FILTER) { 790c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMP) 7911da177e4SLinus Torvalds return -EOPNOTSUPP; 7921da177e4SLinus Torvalds else 7931da177e4SLinus Torvalds return raw_geticmpfilter(sk, optval, optlen); 7941da177e4SLinus Torvalds } 7951da177e4SLinus Torvalds return -ENOPROTOOPT; 7961da177e4SLinus Torvalds } 7971da177e4SLinus Torvalds 7983fdadf7dSDmitry Mishin static int raw_getsockopt(struct sock *sk, int level, int optname, 7993fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 8003fdadf7dSDmitry Mishin { 8013fdadf7dSDmitry Mishin if (level != SOL_RAW) 8023fdadf7dSDmitry Mishin return ip_getsockopt(sk, level, optname, optval, optlen); 8033fdadf7dSDmitry Mishin return do_raw_getsockopt(sk, level, optname, optval, optlen); 8043fdadf7dSDmitry Mishin } 8053fdadf7dSDmitry Mishin 8063fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 8073fdadf7dSDmitry Mishin static int compat_raw_getsockopt(struct sock *sk, int level, int optname, 8083fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 8093fdadf7dSDmitry Mishin { 8103fdadf7dSDmitry Mishin if (level != SOL_RAW) 811543d9cfeSArnaldo Carvalho de Melo return compat_ip_getsockopt(sk, level, optname, optval, optlen); 8123fdadf7dSDmitry Mishin return do_raw_getsockopt(sk, level, optname, optval, optlen); 8133fdadf7dSDmitry Mishin } 8143fdadf7dSDmitry Mishin #endif 8153fdadf7dSDmitry Mishin 8161da177e4SLinus Torvalds static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg) 8171da177e4SLinus Torvalds { 8181da177e4SLinus Torvalds switch (cmd) { 8191da177e4SLinus Torvalds case SIOCOUTQ: { 82031e6d363SEric Dumazet int amount = sk_wmem_alloc_get(sk); 82131e6d363SEric Dumazet 8221da177e4SLinus Torvalds return put_user(amount, (int __user *)arg); 8231da177e4SLinus Torvalds } 8241da177e4SLinus Torvalds case SIOCINQ: { 8251da177e4SLinus Torvalds struct sk_buff *skb; 8261da177e4SLinus Torvalds int amount = 0; 8271da177e4SLinus Torvalds 828e0f9f858SHerbert Xu spin_lock_bh(&sk->sk_receive_queue.lock); 8291da177e4SLinus Torvalds skb = skb_peek(&sk->sk_receive_queue); 8301da177e4SLinus Torvalds if (skb != NULL) 8311da177e4SLinus Torvalds amount = skb->len; 832e0f9f858SHerbert Xu spin_unlock_bh(&sk->sk_receive_queue.lock); 8331da177e4SLinus Torvalds return put_user(amount, (int __user *)arg); 8341da177e4SLinus Torvalds } 8351da177e4SLinus Torvalds 8361da177e4SLinus Torvalds default: 8371da177e4SLinus Torvalds #ifdef CONFIG_IP_MROUTE 8381da177e4SLinus Torvalds return ipmr_ioctl(sk, cmd, (void __user *)arg); 8391da177e4SLinus Torvalds #else 8401da177e4SLinus Torvalds return -ENOIOCTLCMD; 8411da177e4SLinus Torvalds #endif 8421da177e4SLinus Torvalds } 8431da177e4SLinus Torvalds } 8441da177e4SLinus Torvalds 845709b46e8SEric W. Biederman #ifdef CONFIG_COMPAT 846709b46e8SEric W. Biederman static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) 847709b46e8SEric W. Biederman { 848709b46e8SEric W. Biederman switch (cmd) { 849709b46e8SEric W. Biederman case SIOCOUTQ: 850709b46e8SEric W. Biederman case SIOCINQ: 851709b46e8SEric W. Biederman return -ENOIOCTLCMD; 852709b46e8SEric W. Biederman default: 853709b46e8SEric W. Biederman #ifdef CONFIG_IP_MROUTE 854709b46e8SEric W. Biederman return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg)); 855709b46e8SEric W. Biederman #else 856709b46e8SEric W. Biederman return -ENOIOCTLCMD; 857709b46e8SEric W. Biederman #endif 858709b46e8SEric W. Biederman } 859709b46e8SEric W. Biederman } 860709b46e8SEric W. Biederman #endif 861709b46e8SEric W. Biederman 8621da177e4SLinus Torvalds struct proto raw_prot = { 8631da177e4SLinus Torvalds .name = "RAW", 8641da177e4SLinus Torvalds .owner = THIS_MODULE, 8651da177e4SLinus Torvalds .close = raw_close, 86622dd4850SDenis V. Lunev .destroy = raw_destroy, 8671da177e4SLinus Torvalds .connect = ip4_datagram_connect, 8681da177e4SLinus Torvalds .disconnect = udp_disconnect, 8691da177e4SLinus Torvalds .ioctl = raw_ioctl, 8701da177e4SLinus Torvalds .init = raw_init, 8711da177e4SLinus Torvalds .setsockopt = raw_setsockopt, 8721da177e4SLinus Torvalds .getsockopt = raw_getsockopt, 8731da177e4SLinus Torvalds .sendmsg = raw_sendmsg, 8741da177e4SLinus Torvalds .recvmsg = raw_recvmsg, 8751da177e4SLinus Torvalds .bind = raw_bind, 8761da177e4SLinus Torvalds .backlog_rcv = raw_rcv_skb, 8778141ed9fSSteffen Klassert .release_cb = ip4_datagram_release_cb, 878fc8717baSPavel Emelyanov .hash = raw_hash_sk, 879fc8717baSPavel Emelyanov .unhash = raw_unhash_sk, 8801da177e4SLinus Torvalds .obj_size = sizeof(struct raw_sock), 881fc8717baSPavel Emelyanov .h.raw_hash = &raw_v4_hashinfo, 882543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 883543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_raw_setsockopt, 884543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_raw_getsockopt, 885709b46e8SEric W. Biederman .compat_ioctl = compat_raw_ioctl, 886543d9cfeSArnaldo Carvalho de Melo #endif 8871da177e4SLinus Torvalds }; 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 8901da177e4SLinus Torvalds static struct sock *raw_get_first(struct seq_file *seq) 8911da177e4SLinus Torvalds { 8921da177e4SLinus Torvalds struct sock *sk; 8931da177e4SLinus Torvalds struct raw_iter_state *state = raw_seq_private(seq); 8941da177e4SLinus Torvalds 895b673e4dfSPavel Emelyanov for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE; 896b673e4dfSPavel Emelyanov ++state->bucket) { 897b67bfe0dSSasha Levin sk_for_each(sk, &state->h->ht[state->bucket]) 8981218854aSYOSHIFUJI Hideaki if (sock_net(sk) == seq_file_net(seq)) 8991da177e4SLinus Torvalds goto found; 9001da177e4SLinus Torvalds } 9011da177e4SLinus Torvalds sk = NULL; 9021da177e4SLinus Torvalds found: 9031da177e4SLinus Torvalds return sk; 9041da177e4SLinus Torvalds } 9051da177e4SLinus Torvalds 9061da177e4SLinus Torvalds static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk) 9071da177e4SLinus Torvalds { 9081da177e4SLinus Torvalds struct raw_iter_state *state = raw_seq_private(seq); 9091da177e4SLinus Torvalds 9101da177e4SLinus Torvalds do { 9111da177e4SLinus Torvalds sk = sk_next(sk); 9121da177e4SLinus Torvalds try_again: 9131da177e4SLinus Torvalds ; 9141218854aSYOSHIFUJI Hideaki } while (sk && sock_net(sk) != seq_file_net(seq)); 9151da177e4SLinus Torvalds 916b673e4dfSPavel Emelyanov if (!sk && ++state->bucket < RAW_HTABLE_SIZE) { 91742a73808SPavel Emelyanov sk = sk_head(&state->h->ht[state->bucket]); 9181da177e4SLinus Torvalds goto try_again; 9191da177e4SLinus Torvalds } 9201da177e4SLinus Torvalds return sk; 9211da177e4SLinus Torvalds } 9221da177e4SLinus Torvalds 9231da177e4SLinus Torvalds static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos) 9241da177e4SLinus Torvalds { 9251da177e4SLinus Torvalds struct sock *sk = raw_get_first(seq); 9261da177e4SLinus Torvalds 9271da177e4SLinus Torvalds if (sk) 9281da177e4SLinus Torvalds while (pos && (sk = raw_get_next(seq, sk)) != NULL) 9291da177e4SLinus Torvalds --pos; 9301da177e4SLinus Torvalds return pos ? NULL : sk; 9311da177e4SLinus Torvalds } 9321da177e4SLinus Torvalds 93342a73808SPavel Emelyanov void *raw_seq_start(struct seq_file *seq, loff_t *pos) 9341da177e4SLinus Torvalds { 93542a73808SPavel Emelyanov struct raw_iter_state *state = raw_seq_private(seq); 93642a73808SPavel Emelyanov 93742a73808SPavel Emelyanov read_lock(&state->h->lock); 9381da177e4SLinus Torvalds return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; 9391da177e4SLinus Torvalds } 94042a73808SPavel Emelyanov EXPORT_SYMBOL_GPL(raw_seq_start); 9411da177e4SLinus Torvalds 94242a73808SPavel Emelyanov void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos) 9431da177e4SLinus Torvalds { 9441da177e4SLinus Torvalds struct sock *sk; 9451da177e4SLinus Torvalds 9461da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 9471da177e4SLinus Torvalds sk = raw_get_first(seq); 9481da177e4SLinus Torvalds else 9491da177e4SLinus Torvalds sk = raw_get_next(seq, v); 9501da177e4SLinus Torvalds ++*pos; 9511da177e4SLinus Torvalds return sk; 9521da177e4SLinus Torvalds } 95342a73808SPavel Emelyanov EXPORT_SYMBOL_GPL(raw_seq_next); 9541da177e4SLinus Torvalds 95542a73808SPavel Emelyanov void raw_seq_stop(struct seq_file *seq, void *v) 9561da177e4SLinus Torvalds { 95742a73808SPavel Emelyanov struct raw_iter_state *state = raw_seq_private(seq); 95842a73808SPavel Emelyanov 95942a73808SPavel Emelyanov read_unlock(&state->h->lock); 9601da177e4SLinus Torvalds } 96142a73808SPavel Emelyanov EXPORT_SYMBOL_GPL(raw_seq_stop); 9621da177e4SLinus Torvalds 9638cd850efSDenis V. Lunev static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) 9641da177e4SLinus Torvalds { 9651da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sp); 966c720c7e8SEric Dumazet __be32 dest = inet->inet_daddr, 967c720c7e8SEric Dumazet src = inet->inet_rcv_saddr; 9681da177e4SLinus Torvalds __u16 destp = 0, 969c720c7e8SEric Dumazet srcp = inet->inet_num; 9701da177e4SLinus Torvalds 9718cd850efSDenis V. Lunev seq_printf(seq, "%4d: %08X:%04X %08X:%04X" 972d14c5ab6SFrancesco Fusco " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d\n", 9731da177e4SLinus Torvalds i, src, srcp, dest, destp, sp->sk_state, 97431e6d363SEric Dumazet sk_wmem_alloc_get(sp), 97531e6d363SEric Dumazet sk_rmem_alloc_get(sp), 976a7cb5a49SEric W. Biederman 0, 0L, 0, 977a7cb5a49SEric W. Biederman from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), 978a7cb5a49SEric W. Biederman 0, sock_i_ino(sp), 97933c732c3SWang Chen atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); 9801da177e4SLinus Torvalds } 9811da177e4SLinus Torvalds 9821da177e4SLinus Torvalds static int raw_seq_show(struct seq_file *seq, void *v) 9831da177e4SLinus Torvalds { 9841da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 9858cd850efSDenis V. Lunev seq_printf(seq, " sl local_address rem_address st tx_queue " 9861da177e4SLinus Torvalds "rx_queue tr tm->when retrnsmt uid timeout " 987cb61cb9bSEric Dumazet "inode ref pointer drops\n"); 9888cd850efSDenis V. Lunev else 9898cd850efSDenis V. Lunev raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); 9901da177e4SLinus Torvalds return 0; 9911da177e4SLinus Torvalds } 9921da177e4SLinus Torvalds 993f690808eSStephen Hemminger static const struct seq_operations raw_seq_ops = { 9941da177e4SLinus Torvalds .start = raw_seq_start, 9951da177e4SLinus Torvalds .next = raw_seq_next, 9961da177e4SLinus Torvalds .stop = raw_seq_stop, 9971da177e4SLinus Torvalds .show = raw_seq_show, 9981da177e4SLinus Torvalds }; 9991da177e4SLinus Torvalds 10003046d767SDenis V. Lunev int raw_seq_open(struct inode *ino, struct file *file, 10013046d767SDenis V. Lunev struct raw_hashinfo *h, const struct seq_operations *ops) 10021da177e4SLinus Torvalds { 1003f51d599fSPavel Emelyanov int err; 100442a73808SPavel Emelyanov struct raw_iter_state *i; 100542a73808SPavel Emelyanov 10063046d767SDenis V. Lunev err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state)); 1007f51d599fSPavel Emelyanov if (err < 0) 1008f51d599fSPavel Emelyanov return err; 100942a73808SPavel Emelyanov 1010f51d599fSPavel Emelyanov i = raw_seq_private((struct seq_file *)file->private_data); 101142a73808SPavel Emelyanov i->h = h; 101242a73808SPavel Emelyanov return 0; 101342a73808SPavel Emelyanov } 101442a73808SPavel Emelyanov EXPORT_SYMBOL_GPL(raw_seq_open); 101542a73808SPavel Emelyanov 101642a73808SPavel Emelyanov static int raw_v4_seq_open(struct inode *inode, struct file *file) 101742a73808SPavel Emelyanov { 10183046d767SDenis V. Lunev return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops); 10191da177e4SLinus Torvalds } 10201da177e4SLinus Torvalds 10219a32144eSArjan van de Ven static const struct file_operations raw_seq_fops = { 10221da177e4SLinus Torvalds .owner = THIS_MODULE, 102342a73808SPavel Emelyanov .open = raw_v4_seq_open, 10241da177e4SLinus Torvalds .read = seq_read, 10251da177e4SLinus Torvalds .llseek = seq_lseek, 1026f51d599fSPavel Emelyanov .release = seq_release_net, 10271da177e4SLinus Torvalds }; 10281da177e4SLinus Torvalds 1029a308da16SPavel Emelyanov static __net_init int raw_init_net(struct net *net) 1030a308da16SPavel Emelyanov { 1031d4beaa66SGao feng if (!proc_create("raw", S_IRUGO, net->proc_net, &raw_seq_fops)) 1032a308da16SPavel Emelyanov return -ENOMEM; 1033a308da16SPavel Emelyanov 1034a308da16SPavel Emelyanov return 0; 1035a308da16SPavel Emelyanov } 1036a308da16SPavel Emelyanov 1037a308da16SPavel Emelyanov static __net_exit void raw_exit_net(struct net *net) 1038a308da16SPavel Emelyanov { 1039ece31ffdSGao feng remove_proc_entry("raw", net->proc_net); 1040a308da16SPavel Emelyanov } 1041a308da16SPavel Emelyanov 1042a308da16SPavel Emelyanov static __net_initdata struct pernet_operations raw_net_ops = { 1043a308da16SPavel Emelyanov .init = raw_init_net, 1044a308da16SPavel Emelyanov .exit = raw_exit_net, 1045a308da16SPavel Emelyanov }; 1046a308da16SPavel Emelyanov 10471da177e4SLinus Torvalds int __init raw_proc_init(void) 10481da177e4SLinus Torvalds { 1049a308da16SPavel Emelyanov return register_pernet_subsys(&raw_net_ops); 10501da177e4SLinus Torvalds } 10511da177e4SLinus Torvalds 10521da177e4SLinus Torvalds void __init raw_proc_exit(void) 10531da177e4SLinus Torvalds { 1054a308da16SPavel Emelyanov unregister_pernet_subsys(&raw_net_ops); 10551da177e4SLinus Torvalds } 10561da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */ 1057