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> 61457c4cbcSEric W. Biederman #include <net/net_namespace.h> 621da177e4SLinus Torvalds #include <net/dst.h> 631da177e4SLinus Torvalds #include <net/sock.h> 641da177e4SLinus Torvalds #include <linux/ip.h> 651da177e4SLinus Torvalds #include <linux/net.h> 661da177e4SLinus Torvalds #include <net/ip.h> 671da177e4SLinus Torvalds #include <net/icmp.h> 681da177e4SLinus Torvalds #include <net/udp.h> 691da177e4SLinus Torvalds #include <net/raw.h> 701da177e4SLinus Torvalds #include <net/snmp.h> 71c752f073SArnaldo Carvalho de Melo #include <net/tcp_states.h> 721da177e4SLinus Torvalds #include <net/inet_common.h> 731da177e4SLinus Torvalds #include <net/checksum.h> 741da177e4SLinus Torvalds #include <net/xfrm.h> 751da177e4SLinus Torvalds #include <linux/rtnetlink.h> 761da177e4SLinus Torvalds #include <linux/proc_fs.h> 771da177e4SLinus Torvalds #include <linux/seq_file.h> 781da177e4SLinus Torvalds #include <linux/netfilter.h> 791da177e4SLinus Torvalds #include <linux/netfilter_ipv4.h> 80709b46e8SEric W. Biederman #include <linux/compat.h> 811da177e4SLinus Torvalds 82b673e4dfSPavel Emelyanov static struct raw_hashinfo raw_v4_hashinfo = { 83938b93adSRobert P. J. Day .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock), 84b673e4dfSPavel Emelyanov }; 851da177e4SLinus Torvalds 86fc8717baSPavel Emelyanov void raw_hash_sk(struct sock *sk) 871da177e4SLinus Torvalds { 88fc8717baSPavel Emelyanov struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; 8965b4c50bSPavel Emelyanov struct hlist_head *head; 901da177e4SLinus Torvalds 91c720c7e8SEric Dumazet head = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)]; 9265b4c50bSPavel Emelyanov 9365b4c50bSPavel Emelyanov write_lock_bh(&h->lock); 941da177e4SLinus Torvalds sk_add_node(sk, head); 95c29a0bc4SPavel Emelyanov sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); 9665b4c50bSPavel Emelyanov write_unlock_bh(&h->lock); 9765b4c50bSPavel Emelyanov } 9865b4c50bSPavel Emelyanov EXPORT_SYMBOL_GPL(raw_hash_sk); 9965b4c50bSPavel Emelyanov 100fc8717baSPavel Emelyanov void raw_unhash_sk(struct sock *sk) 101ab70768eSPavel Emelyanov { 102fc8717baSPavel Emelyanov struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; 103fc8717baSPavel Emelyanov 104ab70768eSPavel Emelyanov write_lock_bh(&h->lock); 105ab70768eSPavel Emelyanov if (sk_del_node_init(sk)) 106c29a0bc4SPavel Emelyanov sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); 107ab70768eSPavel Emelyanov write_unlock_bh(&h->lock); 108ab70768eSPavel Emelyanov } 109ab70768eSPavel Emelyanov EXPORT_SYMBOL_GPL(raw_unhash_sk); 110ab70768eSPavel Emelyanov 111be185884SPavel Emelyanov static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk, 112be185884SPavel Emelyanov unsigned short num, __be32 raddr, __be32 laddr, int dif) 1131da177e4SLinus Torvalds { 114b67bfe0dSSasha Levin sk_for_each_from(sk) { 1151da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 1161da177e4SLinus Torvalds 117c720c7e8SEric Dumazet if (net_eq(sock_net(sk), net) && inet->inet_num == num && 118c720c7e8SEric Dumazet !(inet->inet_daddr && inet->inet_daddr != raddr) && 119c720c7e8SEric Dumazet !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) && 1201da177e4SLinus Torvalds !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)) 1211da177e4SLinus Torvalds goto found; /* gotcha */ 1221da177e4SLinus Torvalds } 1231da177e4SLinus Torvalds sk = NULL; 1241da177e4SLinus Torvalds found: 1251da177e4SLinus Torvalds return sk; 1261da177e4SLinus Torvalds } 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds /* 1291da177e4SLinus Torvalds * 0 - deliver 1301da177e4SLinus Torvalds * 1 - block 1311da177e4SLinus Torvalds */ 132ab43ed8bSEric Dumazet static int icmp_filter(const struct sock *sk, const struct sk_buff *skb) 1331da177e4SLinus Torvalds { 134ab43ed8bSEric Dumazet struct icmphdr _hdr; 135ab43ed8bSEric Dumazet const struct icmphdr *hdr; 1361da177e4SLinus Torvalds 137ab43ed8bSEric Dumazet hdr = skb_header_pointer(skb, skb_transport_offset(skb), 138ab43ed8bSEric Dumazet sizeof(_hdr), &_hdr); 139ab43ed8bSEric Dumazet if (!hdr) 1401da177e4SLinus Torvalds return 1; 1411da177e4SLinus Torvalds 142ab43ed8bSEric Dumazet if (hdr->type < 32) { 1431da177e4SLinus Torvalds __u32 data = raw_sk(sk)->filter.data; 1441da177e4SLinus Torvalds 145ab43ed8bSEric Dumazet return ((1U << hdr->type) & data) != 0; 1461da177e4SLinus Torvalds } 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds /* Do not block unknown ICMP types */ 1491da177e4SLinus Torvalds return 0; 1501da177e4SLinus Torvalds } 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds /* IP input processing comes here for RAW socket delivery. 1531da177e4SLinus Torvalds * Caller owns SKB, so we must make clones. 1541da177e4SLinus Torvalds * 1551da177e4SLinus Torvalds * RFC 1122: SHOULD pass TOS value up to the transport layer. 1561da177e4SLinus Torvalds * -> It does. And not only TOS, but all IP header. 1571da177e4SLinus Torvalds */ 158b71d1d42SEric Dumazet static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash) 1591da177e4SLinus Torvalds { 1601da177e4SLinus Torvalds struct sock *sk; 1611da177e4SLinus Torvalds struct hlist_head *head; 162d13964f4SPatrick McHardy int delivered = 0; 163be185884SPavel Emelyanov struct net *net; 1641da177e4SLinus Torvalds 165b673e4dfSPavel Emelyanov read_lock(&raw_v4_hashinfo.lock); 166b673e4dfSPavel Emelyanov head = &raw_v4_hashinfo.ht[hash]; 1671da177e4SLinus Torvalds if (hlist_empty(head)) 1681da177e4SLinus Torvalds goto out; 169be185884SPavel Emelyanov 170c346dca1SYOSHIFUJI Hideaki net = dev_net(skb->dev); 171be185884SPavel Emelyanov sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol, 1721da177e4SLinus Torvalds iph->saddr, iph->daddr, 1731da177e4SLinus Torvalds skb->dev->ifindex); 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds while (sk) { 176d13964f4SPatrick McHardy delivered = 1; 1771da177e4SLinus Torvalds if (iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) { 1781da177e4SLinus Torvalds struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds /* Not releasing hash table! */ 1811da177e4SLinus Torvalds if (clone) 1821da177e4SLinus Torvalds raw_rcv(sk, clone); 1831da177e4SLinus Torvalds } 184be185884SPavel Emelyanov sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol, 1851da177e4SLinus Torvalds iph->saddr, iph->daddr, 1861da177e4SLinus Torvalds skb->dev->ifindex); 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds out: 189b673e4dfSPavel Emelyanov read_unlock(&raw_v4_hashinfo.lock); 190d13964f4SPatrick McHardy return delivered; 1911da177e4SLinus Torvalds } 1921da177e4SLinus Torvalds 1937bc54c90SPavel Emelyanov int raw_local_deliver(struct sk_buff *skb, int protocol) 1947bc54c90SPavel Emelyanov { 1957bc54c90SPavel Emelyanov int hash; 1967bc54c90SPavel Emelyanov struct sock *raw_sk; 1977bc54c90SPavel Emelyanov 198b673e4dfSPavel Emelyanov hash = protocol & (RAW_HTABLE_SIZE - 1); 199b673e4dfSPavel Emelyanov raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); 2007bc54c90SPavel Emelyanov 2017bc54c90SPavel Emelyanov /* If there maybe a raw socket we must check - if not we 2027bc54c90SPavel Emelyanov * don't care less 2037bc54c90SPavel Emelyanov */ 2047bc54c90SPavel Emelyanov if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash)) 2057bc54c90SPavel Emelyanov raw_sk = NULL; 2067bc54c90SPavel Emelyanov 2077bc54c90SPavel Emelyanov return raw_sk != NULL; 2087bc54c90SPavel Emelyanov 2097bc54c90SPavel Emelyanov } 2107bc54c90SPavel Emelyanov 2117bc54c90SPavel Emelyanov static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info) 2121da177e4SLinus Torvalds { 2131da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 21488c7664fSArnaldo Carvalho de Melo const int type = icmp_hdr(skb)->type; 21588c7664fSArnaldo Carvalho de Melo const int code = icmp_hdr(skb)->code; 2161da177e4SLinus Torvalds int err = 0; 2171da177e4SLinus Torvalds int harderr = 0; 2181da177e4SLinus Torvalds 21936393395SDavid S. Miller if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) 22036393395SDavid S. Miller ipv4_sk_update_pmtu(skb, sk, info); 2218d65b119SDuan Jiong else if (type == ICMP_REDIRECT) { 22255be7a9cSDavid S. Miller ipv4_sk_redirect(skb, sk); 2238d65b119SDuan Jiong return; 2248d65b119SDuan Jiong } 22536393395SDavid S. Miller 2261da177e4SLinus Torvalds /* Report error on raw socket, if: 2271da177e4SLinus Torvalds 1. User requested ip_recverr. 2281da177e4SLinus Torvalds 2. Socket is connected (otherwise the error indication 2291da177e4SLinus Torvalds is useless without ip_recverr and error is hard. 2301da177e4SLinus Torvalds */ 2311da177e4SLinus Torvalds if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED) 2321da177e4SLinus Torvalds return; 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds switch (type) { 2351da177e4SLinus Torvalds default: 2361da177e4SLinus Torvalds case ICMP_TIME_EXCEEDED: 2371da177e4SLinus Torvalds err = EHOSTUNREACH; 2381da177e4SLinus Torvalds break; 2391da177e4SLinus Torvalds case ICMP_SOURCE_QUENCH: 2401da177e4SLinus Torvalds return; 2411da177e4SLinus Torvalds case ICMP_PARAMETERPROB: 2421da177e4SLinus Torvalds err = EPROTO; 2431da177e4SLinus Torvalds harderr = 1; 2441da177e4SLinus Torvalds break; 2451da177e4SLinus Torvalds case ICMP_DEST_UNREACH: 2461da177e4SLinus Torvalds err = EHOSTUNREACH; 2471da177e4SLinus Torvalds if (code > NR_ICMP_UNREACH) 2481da177e4SLinus Torvalds break; 2491da177e4SLinus Torvalds err = icmp_err_convert[code].errno; 2501da177e4SLinus Torvalds harderr = icmp_err_convert[code].fatal; 2511da177e4SLinus Torvalds if (code == ICMP_FRAG_NEEDED) { 2521da177e4SLinus Torvalds harderr = inet->pmtudisc != IP_PMTUDISC_DONT; 2531da177e4SLinus Torvalds err = EMSGSIZE; 2541da177e4SLinus Torvalds } 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds if (inet->recverr) { 258b71d1d42SEric Dumazet const struct iphdr *iph = (const struct iphdr *)skb->data; 2591da177e4SLinus Torvalds u8 *payload = skb->data + (iph->ihl << 2); 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds if (inet->hdrincl) 2621da177e4SLinus Torvalds payload = skb->data; 2631da177e4SLinus Torvalds ip_icmp_error(sk, skb, err, 0, info, payload); 2641da177e4SLinus Torvalds } 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds if (inet->recverr || harderr) { 2671da177e4SLinus Torvalds sk->sk_err = err; 2681da177e4SLinus Torvalds sk->sk_error_report(sk); 2691da177e4SLinus Torvalds } 2701da177e4SLinus Torvalds } 2711da177e4SLinus Torvalds 2727bc54c90SPavel Emelyanov void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info) 2737bc54c90SPavel Emelyanov { 2747bc54c90SPavel Emelyanov int hash; 2757bc54c90SPavel Emelyanov struct sock *raw_sk; 276b71d1d42SEric Dumazet const struct iphdr *iph; 277be185884SPavel Emelyanov struct net *net; 2787bc54c90SPavel Emelyanov 279b673e4dfSPavel Emelyanov hash = protocol & (RAW_HTABLE_SIZE - 1); 2807bc54c90SPavel Emelyanov 281b673e4dfSPavel Emelyanov read_lock(&raw_v4_hashinfo.lock); 282b673e4dfSPavel Emelyanov raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); 2837bc54c90SPavel Emelyanov if (raw_sk != NULL) { 284b71d1d42SEric Dumazet iph = (const struct iphdr *)skb->data; 285c346dca1SYOSHIFUJI Hideaki net = dev_net(skb->dev); 286be185884SPavel Emelyanov 287be185884SPavel Emelyanov while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol, 288be185884SPavel Emelyanov iph->daddr, iph->saddr, 2897bc54c90SPavel Emelyanov skb->dev->ifindex)) != NULL) { 2907bc54c90SPavel Emelyanov raw_err(raw_sk, skb, info); 2917bc54c90SPavel Emelyanov raw_sk = sk_next(raw_sk); 292b71d1d42SEric Dumazet iph = (const struct iphdr *)skb->data; 2937bc54c90SPavel Emelyanov } 2947bc54c90SPavel Emelyanov } 295b673e4dfSPavel Emelyanov read_unlock(&raw_v4_hashinfo.lock); 2967bc54c90SPavel Emelyanov } 2977bc54c90SPavel Emelyanov 2981da177e4SLinus Torvalds static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb) 2991da177e4SLinus Torvalds { 3001da177e4SLinus Torvalds /* Charge it to the socket. */ 3011da177e4SLinus Torvalds 302*fbf8866dSShawn Bohrer ipv4_pktinfo_prepare(sk, skb); 303d826eb14SEric Dumazet if (sock_queue_rcv_skb(sk, skb) < 0) { 3041da177e4SLinus Torvalds kfree_skb(skb); 3051da177e4SLinus Torvalds return NET_RX_DROP; 3061da177e4SLinus Torvalds } 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds return NET_RX_SUCCESS; 3091da177e4SLinus Torvalds } 3101da177e4SLinus Torvalds 3111da177e4SLinus Torvalds int raw_rcv(struct sock *sk, struct sk_buff *skb) 3121da177e4SLinus Torvalds { 3131da177e4SLinus Torvalds if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) { 31433c732c3SWang Chen atomic_inc(&sk->sk_drops); 3151da177e4SLinus Torvalds kfree_skb(skb); 3161da177e4SLinus Torvalds return NET_RX_DROP; 3171da177e4SLinus Torvalds } 318b59c2701SPatrick McHardy nf_reset(skb); 3191da177e4SLinus Torvalds 320d56f90a7SArnaldo Carvalho de Melo skb_push(skb, skb->data - skb_network_header(skb)); 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds raw_rcv_skb(sk, skb); 3231da177e4SLinus Torvalds return 0; 3241da177e4SLinus Torvalds } 3251da177e4SLinus Torvalds 32677968b78SDavid S. Miller static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4, 32777968b78SDavid S. Miller void *from, size_t length, 3281789a640SEric Dumazet struct rtable **rtp, 3291da177e4SLinus Torvalds unsigned int flags) 3301da177e4SLinus Torvalds { 3311da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 3320388b004SPavel Emelyanov struct net *net = sock_net(sk); 3331da177e4SLinus Torvalds struct iphdr *iph; 3341da177e4SLinus Torvalds struct sk_buff *skb; 335f844c74fSHerbert Xu unsigned int iphlen; 3361da177e4SLinus Torvalds int err; 3371789a640SEric Dumazet struct rtable *rt = *rtp; 33866088243SHerbert Xu int hlen, tlen; 3391da177e4SLinus Torvalds 340d8d1f30bSChangli Gao if (length > rt->dst.dev->mtu) { 34177968b78SDavid S. Miller ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, 342d8d1f30bSChangli Gao rt->dst.dev->mtu); 3431da177e4SLinus Torvalds return -EMSGSIZE; 3441da177e4SLinus Torvalds } 3451da177e4SLinus Torvalds if (flags&MSG_PROBE) 3461da177e4SLinus Torvalds goto out; 3471da177e4SLinus Torvalds 34866088243SHerbert Xu hlen = LL_RESERVED_SPACE(rt->dst.dev); 34966088243SHerbert Xu tlen = rt->dst.dev->needed_tailroom; 350f5184d26SJohannes Berg skb = sock_alloc_send_skb(sk, 35166088243SHerbert Xu length + hlen + tlen + 15, 3521da177e4SLinus Torvalds flags & MSG_DONTWAIT, &err); 3531da177e4SLinus Torvalds if (skb == NULL) 3541da177e4SLinus Torvalds goto error; 35566088243SHerbert Xu skb_reserve(skb, hlen); 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds skb->priority = sk->sk_priority; 3584a19ec58SLaszlo Attila Toth skb->mark = sk->sk_mark; 359d8d1f30bSChangli Gao skb_dst_set(skb, &rt->dst); 3601789a640SEric Dumazet *rtp = NULL; 3611da177e4SLinus Torvalds 3627e28ecc2SArnaldo Carvalho de Melo skb_reset_network_header(skb); 363eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 3647e28ecc2SArnaldo Carvalho de Melo skb_put(skb, length); 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds skb->ip_summed = CHECKSUM_NONE; 3671da177e4SLinus Torvalds 368b0e380b1SArnaldo Carvalho de Melo skb->transport_header = skb->network_header; 36955888dfbSNeil Horman err = -EFAULT; 37055888dfbSNeil Horman if (memcpy_fromiovecend((void *)iph, from, 0, length)) 37155888dfbSNeil Horman goto error_free; 3721da177e4SLinus Torvalds 373f844c74fSHerbert Xu iphlen = iph->ihl * 4; 37455888dfbSNeil Horman 37555888dfbSNeil Horman /* 37655888dfbSNeil Horman * We don't want to modify the ip header, but we do need to 37755888dfbSNeil Horman * be sure that it won't cause problems later along the network 37855888dfbSNeil Horman * stack. Specifically we want to make sure that iph->ihl is a 37955888dfbSNeil Horman * sane value. If ihl points beyond the length of the buffer passed 38055888dfbSNeil Horman * in, reject the frame as invalid 38155888dfbSNeil Horman */ 38255888dfbSNeil Horman err = -EINVAL; 38355888dfbSNeil Horman if (iphlen > length) 38455888dfbSNeil Horman goto error_free; 38555888dfbSNeil Horman 38655888dfbSNeil Horman if (iphlen >= sizeof(*iph)) { 3871da177e4SLinus Torvalds if (!iph->saddr) 38877968b78SDavid S. Miller iph->saddr = fl4->saddr; 3891da177e4SLinus Torvalds iph->check = 0; 3901da177e4SLinus Torvalds iph->tot_len = htons(length); 3911da177e4SLinus Torvalds if (!iph->id) 392703133deSAnsis Atteka ip_select_ident(skb, &rt->dst, NULL); 3931da177e4SLinus Torvalds 3941da177e4SLinus Torvalds iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 3951da177e4SLinus Torvalds } 39696793b48SDavid L Stevens if (iph->protocol == IPPROTO_ICMP) 3970388b004SPavel Emelyanov icmp_out_count(net, ((struct icmphdr *) 39896793b48SDavid L Stevens skb_transport_header(skb))->type); 3991da177e4SLinus Torvalds 4009bbc768aSJan Engelhardt err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, skb, NULL, 401d8d1f30bSChangli Gao rt->dst.dev, dst_output); 4021da177e4SLinus Torvalds if (err > 0) 4036ce9e7b5SEric Dumazet err = net_xmit_errno(err); 4041da177e4SLinus Torvalds if (err) 4051da177e4SLinus Torvalds goto error; 4061da177e4SLinus Torvalds out: 4071da177e4SLinus Torvalds return 0; 4081da177e4SLinus Torvalds 40955888dfbSNeil Horman error_free: 4101da177e4SLinus Torvalds kfree_skb(skb); 4111da177e4SLinus Torvalds error: 4125e38e270SPavel Emelyanov IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS); 4136ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet->recverr) 4146ce9e7b5SEric Dumazet err = 0; 4151da177e4SLinus Torvalds return err; 4161da177e4SLinus Torvalds } 4171da177e4SLinus Torvalds 4189d6ec938SDavid S. Miller static int raw_probe_proto_opt(struct flowi4 *fl4, struct msghdr *msg) 4191da177e4SLinus Torvalds { 4201da177e4SLinus Torvalds struct iovec *iov; 4211da177e4SLinus Torvalds u8 __user *type = NULL; 4221da177e4SLinus Torvalds u8 __user *code = NULL; 4231da177e4SLinus Torvalds int probed = 0; 42493765d8aSJesper Juhl unsigned int i; 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds if (!msg->msg_iov) 427a27b58feSHeiko Carstens return 0; 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds for (i = 0; i < msg->msg_iovlen; i++) { 4301da177e4SLinus Torvalds iov = &msg->msg_iov[i]; 4311da177e4SLinus Torvalds if (!iov) 4321da177e4SLinus Torvalds continue; 4331da177e4SLinus Torvalds 4349d6ec938SDavid S. Miller switch (fl4->flowi4_proto) { 4351da177e4SLinus Torvalds case IPPROTO_ICMP: 4361da177e4SLinus Torvalds /* check if one-byte field is readable or not. */ 4371da177e4SLinus Torvalds if (iov->iov_base && iov->iov_len < 1) 4381da177e4SLinus Torvalds break; 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds if (!type) { 4411da177e4SLinus Torvalds type = iov->iov_base; 4421da177e4SLinus Torvalds /* check if code field is readable or not. */ 4431da177e4SLinus Torvalds if (iov->iov_len > 1) 4441da177e4SLinus Torvalds code = type + 1; 4451da177e4SLinus Torvalds } else if (!code) 4461da177e4SLinus Torvalds code = iov->iov_base; 4471da177e4SLinus Torvalds 4481da177e4SLinus Torvalds if (type && code) { 4499cce96dfSDavid S. Miller if (get_user(fl4->fl4_icmp_type, type) || 4509cce96dfSDavid S. Miller get_user(fl4->fl4_icmp_code, code)) 451a27b58feSHeiko Carstens return -EFAULT; 4521da177e4SLinus Torvalds probed = 1; 4531da177e4SLinus Torvalds } 4541da177e4SLinus Torvalds break; 4551da177e4SLinus Torvalds default: 4561da177e4SLinus Torvalds probed = 1; 4571da177e4SLinus Torvalds break; 4581da177e4SLinus Torvalds } 4591da177e4SLinus Torvalds if (probed) 4601da177e4SLinus Torvalds break; 4611da177e4SLinus Torvalds } 462a27b58feSHeiko Carstens return 0; 4631da177e4SLinus Torvalds } 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, 4661da177e4SLinus Torvalds size_t len) 4671da177e4SLinus Torvalds { 4681da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 4691da177e4SLinus Torvalds struct ipcm_cookie ipc; 4701da177e4SLinus Torvalds struct rtable *rt = NULL; 47177968b78SDavid S. Miller struct flowi4 fl4; 4721da177e4SLinus Torvalds int free = 0; 4733ca3c68eSAl Viro __be32 daddr; 474c1d18f9fSAl Viro __be32 saddr; 4751da177e4SLinus Torvalds u8 tos; 4761da177e4SLinus Torvalds int err; 477f6d8bd05SEric Dumazet struct ip_options_data opt_copy; 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds err = -EMSGSIZE; 480926d4b81SJesper Juhl if (len > 0xFFFF) 4811da177e4SLinus Torvalds goto out; 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds /* 4841da177e4SLinus Torvalds * Check the flags. 4851da177e4SLinus Torvalds */ 4861da177e4SLinus Torvalds 4871da177e4SLinus Torvalds err = -EOPNOTSUPP; 4881da177e4SLinus Torvalds if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */ 4891da177e4SLinus Torvalds goto out; /* compatibility */ 4901da177e4SLinus Torvalds 4911da177e4SLinus Torvalds /* 4921da177e4SLinus Torvalds * Get and verify the address. 4931da177e4SLinus Torvalds */ 4941da177e4SLinus Torvalds 4951da177e4SLinus Torvalds if (msg->msg_namelen) { 4961da177e4SLinus Torvalds struct sockaddr_in *usin = (struct sockaddr_in *)msg->msg_name; 4971da177e4SLinus Torvalds err = -EINVAL; 4981da177e4SLinus Torvalds if (msg->msg_namelen < sizeof(*usin)) 4991da177e4SLinus Torvalds goto out; 5001da177e4SLinus Torvalds if (usin->sin_family != AF_INET) { 501058bd4d2SJoe Perches pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n", 502058bd4d2SJoe Perches __func__, current->comm); 5031da177e4SLinus Torvalds err = -EAFNOSUPPORT; 5041da177e4SLinus Torvalds if (usin->sin_family) 5051da177e4SLinus Torvalds goto out; 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds daddr = usin->sin_addr.s_addr; 5081da177e4SLinus Torvalds /* ANK: I did not forget to get protocol from port field. 5091da177e4SLinus Torvalds * I just do not know, who uses this weirdness. 5101da177e4SLinus Torvalds * IP_HDRINCL is much more convenient. 5111da177e4SLinus Torvalds */ 5121da177e4SLinus Torvalds } else { 5131da177e4SLinus Torvalds err = -EDESTADDRREQ; 5141da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 5151da177e4SLinus Torvalds goto out; 516c720c7e8SEric Dumazet daddr = inet->inet_daddr; 5171da177e4SLinus Torvalds } 5181da177e4SLinus Torvalds 519c720c7e8SEric Dumazet ipc.addr = inet->inet_saddr; 5201da177e4SLinus Torvalds ipc.opt = NULL; 5212244d07bSOliver Hartkopp ipc.tx_flags = 0; 522aa661581SFrancesco Fusco ipc.ttl = 0; 523aa661581SFrancesco Fusco ipc.tos = -1; 5241da177e4SLinus Torvalds ipc.oif = sk->sk_bound_dev_if; 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds if (msg->msg_controllen) { 5273b1e0a65SYOSHIFUJI Hideaki err = ip_cmsg_send(sock_net(sk), msg, &ipc); 5281da177e4SLinus Torvalds if (err) 5291da177e4SLinus Torvalds goto out; 5301da177e4SLinus Torvalds if (ipc.opt) 5311da177e4SLinus Torvalds free = 1; 5321da177e4SLinus Torvalds } 5331da177e4SLinus Torvalds 5341da177e4SLinus Torvalds saddr = ipc.addr; 5351da177e4SLinus Torvalds ipc.addr = daddr; 5361da177e4SLinus Torvalds 537f6d8bd05SEric Dumazet if (!ipc.opt) { 538f6d8bd05SEric Dumazet struct ip_options_rcu *inet_opt; 539f6d8bd05SEric Dumazet 540f6d8bd05SEric Dumazet rcu_read_lock(); 541f6d8bd05SEric Dumazet inet_opt = rcu_dereference(inet->inet_opt); 542f6d8bd05SEric Dumazet if (inet_opt) { 543f6d8bd05SEric Dumazet memcpy(&opt_copy, inet_opt, 544f6d8bd05SEric Dumazet sizeof(*inet_opt) + inet_opt->opt.optlen); 545f6d8bd05SEric Dumazet ipc.opt = &opt_copy.opt; 546f6d8bd05SEric Dumazet } 547f6d8bd05SEric Dumazet rcu_read_unlock(); 548f6d8bd05SEric Dumazet } 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvalds if (ipc.opt) { 5511da177e4SLinus Torvalds err = -EINVAL; 5521da177e4SLinus Torvalds /* Linux does not mangle headers on raw sockets, 5531da177e4SLinus Torvalds * so that IP options + IP_HDRINCL is non-sense. 5541da177e4SLinus Torvalds */ 5551da177e4SLinus Torvalds if (inet->hdrincl) 5561da177e4SLinus Torvalds goto done; 557f6d8bd05SEric Dumazet if (ipc.opt->opt.srr) { 5581da177e4SLinus Torvalds if (!daddr) 5591da177e4SLinus Torvalds goto done; 560f6d8bd05SEric Dumazet daddr = ipc.opt->opt.faddr; 5611da177e4SLinus Torvalds } 5621da177e4SLinus Torvalds } 563aa661581SFrancesco Fusco tos = get_rtconn_flags(&ipc, sk); 5641da177e4SLinus Torvalds if (msg->msg_flags & MSG_DONTROUTE) 5651da177e4SLinus Torvalds tos |= RTO_ONLINK; 5661da177e4SLinus Torvalds 567f97c1e0cSJoe Perches if (ipv4_is_multicast(daddr)) { 5681da177e4SLinus Torvalds if (!ipc.oif) 5691da177e4SLinus Torvalds ipc.oif = inet->mc_index; 5701da177e4SLinus Torvalds if (!saddr) 5711da177e4SLinus Torvalds saddr = inet->mc_addr; 57276e21053SErich E. Hoover } else if (!ipc.oif) 57376e21053SErich E. Hoover ipc.oif = inet->uc_index; 5741da177e4SLinus Torvalds 575ef164ae3SDavid S. Miller flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos, 576ef164ae3SDavid S. Miller RT_SCOPE_UNIVERSE, 577ef164ae3SDavid S. Miller inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol, 578c27c9322SChris Clark inet_sk_flowi_flags(sk) | FLOWI_FLAG_CAN_SLEEP | 579c27c9322SChris Clark (inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0), 58047670b76SJulian Anastasov daddr, saddr, 0, 0); 581ef164ae3SDavid S. Miller 582a27b58feSHeiko Carstens if (!inet->hdrincl) { 5839d6ec938SDavid S. Miller err = raw_probe_proto_opt(&fl4, msg); 584a27b58feSHeiko Carstens if (err) 585a27b58feSHeiko Carstens goto done; 586a27b58feSHeiko Carstens } 5871da177e4SLinus Torvalds 5889d6ec938SDavid S. Miller security_sk_classify_flow(sk, flowi4_to_flowi(&fl4)); 5899d6ec938SDavid S. Miller rt = ip_route_output_flow(sock_net(sk), &fl4, sk); 590b23dd4feSDavid S. Miller if (IS_ERR(rt)) { 591b23dd4feSDavid S. Miller err = PTR_ERR(rt); 5924910ac6cSDavid S. Miller rt = NULL; 5931da177e4SLinus Torvalds goto done; 594b23dd4feSDavid S. Miller } 5951da177e4SLinus Torvalds 5961da177e4SLinus Torvalds err = -EACCES; 5971da177e4SLinus Torvalds if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST)) 5981da177e4SLinus Torvalds goto done; 5991da177e4SLinus Torvalds 6001da177e4SLinus Torvalds if (msg->msg_flags & MSG_CONFIRM) 6011da177e4SLinus Torvalds goto do_confirm; 6021da177e4SLinus Torvalds back_from_confirm: 6031da177e4SLinus Torvalds 6041da177e4SLinus Torvalds if (inet->hdrincl) 60577968b78SDavid S. Miller err = raw_send_hdrinc(sk, &fl4, msg->msg_iov, len, 6061789a640SEric Dumazet &rt, msg->msg_flags); 6071da177e4SLinus Torvalds 6081da177e4SLinus Torvalds else { 6091da177e4SLinus Torvalds if (!ipc.addr) 61077968b78SDavid S. Miller ipc.addr = fl4.daddr; 6111da177e4SLinus Torvalds lock_sock(sk); 612f5fca608SDavid S. Miller err = ip_append_data(sk, &fl4, ip_generic_getfrag, 61377968b78SDavid S. Miller msg->msg_iov, len, 0, 6142e77d89bSEric Dumazet &ipc, &rt, msg->msg_flags); 6151da177e4SLinus Torvalds if (err) 6161da177e4SLinus Torvalds ip_flush_pending_frames(sk); 6176ce9e7b5SEric Dumazet else if (!(msg->msg_flags & MSG_MORE)) { 61877968b78SDavid S. Miller err = ip_push_pending_frames(sk, &fl4); 6196ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet->recverr) 6206ce9e7b5SEric Dumazet err = 0; 6216ce9e7b5SEric Dumazet } 6221da177e4SLinus Torvalds release_sock(sk); 6231da177e4SLinus Torvalds } 6241da177e4SLinus Torvalds done: 6251da177e4SLinus Torvalds if (free) 6261da177e4SLinus Torvalds kfree(ipc.opt); 6271da177e4SLinus Torvalds ip_rt_put(rt); 6281da177e4SLinus Torvalds 6295418c692SJesper Juhl out: 6305418c692SJesper Juhl if (err < 0) 6315418c692SJesper Juhl return err; 6325418c692SJesper Juhl return len; 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds do_confirm: 635d8d1f30bSChangli Gao dst_confirm(&rt->dst); 6361da177e4SLinus Torvalds if (!(msg->msg_flags & MSG_PROBE) || len) 6371da177e4SLinus Torvalds goto back_from_confirm; 6381da177e4SLinus Torvalds err = 0; 6391da177e4SLinus Torvalds goto done; 6401da177e4SLinus Torvalds } 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds static void raw_close(struct sock *sk, long timeout) 6431da177e4SLinus Torvalds { 6441da177e4SLinus Torvalds /* 64525985edcSLucas De Marchi * Raw sockets may have direct kernel references. Kill them. 6461da177e4SLinus Torvalds */ 6471da177e4SLinus Torvalds ip_ra_control(sk, 0, NULL); 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds sk_common_release(sk); 6501da177e4SLinus Torvalds } 6511da177e4SLinus Torvalds 6527d06b2e0SBrian Haley static void raw_destroy(struct sock *sk) 65322dd4850SDenis V. Lunev { 65422dd4850SDenis V. Lunev lock_sock(sk); 65522dd4850SDenis V. Lunev ip_flush_pending_frames(sk); 65622dd4850SDenis V. Lunev release_sock(sk); 65722dd4850SDenis V. Lunev } 65822dd4850SDenis V. Lunev 6591da177e4SLinus Torvalds /* This gets rid of all the nasties in af_inet. -DaveM */ 6601da177e4SLinus Torvalds static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) 6611da177e4SLinus Torvalds { 6621da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 6631da177e4SLinus Torvalds struct sockaddr_in *addr = (struct sockaddr_in *) uaddr; 6641da177e4SLinus Torvalds int ret = -EINVAL; 6651da177e4SLinus Torvalds int chk_addr_ret; 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in)) 6681da177e4SLinus Torvalds goto out; 6693b1e0a65SYOSHIFUJI Hideaki chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr); 6701da177e4SLinus Torvalds ret = -EADDRNOTAVAIL; 6711da177e4SLinus Torvalds if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL && 6721da177e4SLinus Torvalds chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST) 6731da177e4SLinus Torvalds goto out; 674c720c7e8SEric Dumazet inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; 6751da177e4SLinus Torvalds if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) 676c720c7e8SEric Dumazet inet->inet_saddr = 0; /* Use device */ 6771da177e4SLinus Torvalds sk_dst_reset(sk); 6781da177e4SLinus Torvalds ret = 0; 6791da177e4SLinus Torvalds out: return ret; 6801da177e4SLinus Torvalds } 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds /* 6831da177e4SLinus Torvalds * This should be easy, if there is something there 6841da177e4SLinus Torvalds * we return it, otherwise we block. 6851da177e4SLinus Torvalds */ 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, 6881da177e4SLinus Torvalds size_t len, int noblock, int flags, int *addr_len) 6891da177e4SLinus Torvalds { 6901da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 6911da177e4SLinus Torvalds size_t copied = 0; 6921da177e4SLinus Torvalds int err = -EOPNOTSUPP; 6931da177e4SLinus Torvalds struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name; 6941da177e4SLinus Torvalds struct sk_buff *skb; 6951da177e4SLinus Torvalds 6961da177e4SLinus Torvalds if (flags & MSG_OOB) 6971da177e4SLinus Torvalds goto out; 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvalds if (addr_len) 7001da177e4SLinus Torvalds *addr_len = sizeof(*sin); 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds if (flags & MSG_ERRQUEUE) { 7031da177e4SLinus Torvalds err = ip_recv_error(sk, msg, len); 7041da177e4SLinus Torvalds goto out; 7051da177e4SLinus Torvalds } 7061da177e4SLinus Torvalds 7071da177e4SLinus Torvalds skb = skb_recv_datagram(sk, flags, noblock, &err); 7081da177e4SLinus Torvalds if (!skb) 7091da177e4SLinus Torvalds goto out; 7101da177e4SLinus Torvalds 7111da177e4SLinus Torvalds copied = skb->len; 7121da177e4SLinus Torvalds if (len < copied) { 7131da177e4SLinus Torvalds msg->msg_flags |= MSG_TRUNC; 7141da177e4SLinus Torvalds copied = len; 7151da177e4SLinus Torvalds } 7161da177e4SLinus Torvalds 7171da177e4SLinus Torvalds err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 7181da177e4SLinus Torvalds if (err) 7191da177e4SLinus Torvalds goto done; 7201da177e4SLinus Torvalds 7213b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 7221da177e4SLinus Torvalds 7231da177e4SLinus Torvalds /* Copy the address. */ 7241da177e4SLinus Torvalds if (sin) { 7251da177e4SLinus Torvalds sin->sin_family = AF_INET; 726eddc9ec5SArnaldo Carvalho de Melo sin->sin_addr.s_addr = ip_hdr(skb)->saddr; 727f59fc7f3STetsuo Handa sin->sin_port = 0; 7281da177e4SLinus Torvalds memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 7291da177e4SLinus Torvalds } 7301da177e4SLinus Torvalds if (inet->cmsg_flags) 7311da177e4SLinus Torvalds ip_cmsg_recv(msg, skb); 7321da177e4SLinus Torvalds if (flags & MSG_TRUNC) 7331da177e4SLinus Torvalds copied = skb->len; 7341da177e4SLinus Torvalds done: 7351da177e4SLinus Torvalds skb_free_datagram(sk, skb); 7365418c692SJesper Juhl out: 7375418c692SJesper Juhl if (err) 7385418c692SJesper Juhl return err; 7395418c692SJesper Juhl return copied; 7401da177e4SLinus Torvalds } 7411da177e4SLinus Torvalds 7421da177e4SLinus Torvalds static int raw_init(struct sock *sk) 7431da177e4SLinus Torvalds { 7441da177e4SLinus Torvalds struct raw_sock *rp = raw_sk(sk); 7451da177e4SLinus Torvalds 746c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num == IPPROTO_ICMP) 7471da177e4SLinus Torvalds memset(&rp->filter, 0, sizeof(rp->filter)); 7481da177e4SLinus Torvalds return 0; 7491da177e4SLinus Torvalds } 7501da177e4SLinus Torvalds 7511da177e4SLinus Torvalds static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen) 7521da177e4SLinus Torvalds { 7531da177e4SLinus Torvalds if (optlen > sizeof(struct icmp_filter)) 7541da177e4SLinus Torvalds optlen = sizeof(struct icmp_filter); 7551da177e4SLinus Torvalds if (copy_from_user(&raw_sk(sk)->filter, optval, optlen)) 7561da177e4SLinus Torvalds return -EFAULT; 7571da177e4SLinus Torvalds return 0; 7581da177e4SLinus Torvalds } 7591da177e4SLinus Torvalds 7601da177e4SLinus Torvalds static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen) 7611da177e4SLinus Torvalds { 7621da177e4SLinus Torvalds int len, ret = -EFAULT; 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds if (get_user(len, optlen)) 7651da177e4SLinus Torvalds goto out; 7661da177e4SLinus Torvalds ret = -EINVAL; 7671da177e4SLinus Torvalds if (len < 0) 7681da177e4SLinus Torvalds goto out; 7691da177e4SLinus Torvalds if (len > sizeof(struct icmp_filter)) 7701da177e4SLinus Torvalds len = sizeof(struct icmp_filter); 7711da177e4SLinus Torvalds ret = -EFAULT; 7721da177e4SLinus Torvalds if (put_user(len, optlen) || 7731da177e4SLinus Torvalds copy_to_user(optval, &raw_sk(sk)->filter, len)) 7741da177e4SLinus Torvalds goto out; 7751da177e4SLinus Torvalds ret = 0; 7761da177e4SLinus Torvalds out: return ret; 7771da177e4SLinus Torvalds } 7781da177e4SLinus Torvalds 7793fdadf7dSDmitry Mishin static int do_raw_setsockopt(struct sock *sk, int level, int optname, 780b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 7811da177e4SLinus Torvalds { 7821da177e4SLinus Torvalds if (optname == ICMP_FILTER) { 783c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMP) 7841da177e4SLinus Torvalds return -EOPNOTSUPP; 7851da177e4SLinus Torvalds else 7861da177e4SLinus Torvalds return raw_seticmpfilter(sk, optval, optlen); 7871da177e4SLinus Torvalds } 7881da177e4SLinus Torvalds return -ENOPROTOOPT; 7891da177e4SLinus Torvalds } 7901da177e4SLinus Torvalds 7913fdadf7dSDmitry Mishin static int raw_setsockopt(struct sock *sk, int level, int optname, 792b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 7931da177e4SLinus Torvalds { 7941da177e4SLinus Torvalds if (level != SOL_RAW) 7953fdadf7dSDmitry Mishin return ip_setsockopt(sk, level, optname, optval, optlen); 7963fdadf7dSDmitry Mishin return do_raw_setsockopt(sk, level, optname, optval, optlen); 7973fdadf7dSDmitry Mishin } 7981da177e4SLinus Torvalds 7993fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 8003fdadf7dSDmitry Mishin static int compat_raw_setsockopt(struct sock *sk, int level, int optname, 801b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 8023fdadf7dSDmitry Mishin { 8033fdadf7dSDmitry Mishin if (level != SOL_RAW) 804543d9cfeSArnaldo Carvalho de Melo return compat_ip_setsockopt(sk, level, optname, optval, optlen); 8053fdadf7dSDmitry Mishin return do_raw_setsockopt(sk, level, optname, optval, optlen); 8063fdadf7dSDmitry Mishin } 8073fdadf7dSDmitry Mishin #endif 8083fdadf7dSDmitry Mishin 8093fdadf7dSDmitry Mishin static int do_raw_getsockopt(struct sock *sk, int level, int optname, 8103fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 8113fdadf7dSDmitry Mishin { 8121da177e4SLinus Torvalds if (optname == ICMP_FILTER) { 813c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMP) 8141da177e4SLinus Torvalds return -EOPNOTSUPP; 8151da177e4SLinus Torvalds else 8161da177e4SLinus Torvalds return raw_geticmpfilter(sk, optval, optlen); 8171da177e4SLinus Torvalds } 8181da177e4SLinus Torvalds return -ENOPROTOOPT; 8191da177e4SLinus Torvalds } 8201da177e4SLinus Torvalds 8213fdadf7dSDmitry Mishin static int raw_getsockopt(struct sock *sk, int level, int optname, 8223fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 8233fdadf7dSDmitry Mishin { 8243fdadf7dSDmitry Mishin if (level != SOL_RAW) 8253fdadf7dSDmitry Mishin return ip_getsockopt(sk, level, optname, optval, optlen); 8263fdadf7dSDmitry Mishin return do_raw_getsockopt(sk, level, optname, optval, optlen); 8273fdadf7dSDmitry Mishin } 8283fdadf7dSDmitry Mishin 8293fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 8303fdadf7dSDmitry Mishin static int compat_raw_getsockopt(struct sock *sk, int level, int optname, 8313fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 8323fdadf7dSDmitry Mishin { 8333fdadf7dSDmitry Mishin if (level != SOL_RAW) 834543d9cfeSArnaldo Carvalho de Melo return compat_ip_getsockopt(sk, level, optname, optval, optlen); 8353fdadf7dSDmitry Mishin return do_raw_getsockopt(sk, level, optname, optval, optlen); 8363fdadf7dSDmitry Mishin } 8373fdadf7dSDmitry Mishin #endif 8383fdadf7dSDmitry Mishin 8391da177e4SLinus Torvalds static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg) 8401da177e4SLinus Torvalds { 8411da177e4SLinus Torvalds switch (cmd) { 8421da177e4SLinus Torvalds case SIOCOUTQ: { 84331e6d363SEric Dumazet int amount = sk_wmem_alloc_get(sk); 84431e6d363SEric Dumazet 8451da177e4SLinus Torvalds return put_user(amount, (int __user *)arg); 8461da177e4SLinus Torvalds } 8471da177e4SLinus Torvalds case SIOCINQ: { 8481da177e4SLinus Torvalds struct sk_buff *skb; 8491da177e4SLinus Torvalds int amount = 0; 8501da177e4SLinus Torvalds 851e0f9f858SHerbert Xu spin_lock_bh(&sk->sk_receive_queue.lock); 8521da177e4SLinus Torvalds skb = skb_peek(&sk->sk_receive_queue); 8531da177e4SLinus Torvalds if (skb != NULL) 8541da177e4SLinus Torvalds amount = skb->len; 855e0f9f858SHerbert Xu spin_unlock_bh(&sk->sk_receive_queue.lock); 8561da177e4SLinus Torvalds return put_user(amount, (int __user *)arg); 8571da177e4SLinus Torvalds } 8581da177e4SLinus Torvalds 8591da177e4SLinus Torvalds default: 8601da177e4SLinus Torvalds #ifdef CONFIG_IP_MROUTE 8611da177e4SLinus Torvalds return ipmr_ioctl(sk, cmd, (void __user *)arg); 8621da177e4SLinus Torvalds #else 8631da177e4SLinus Torvalds return -ENOIOCTLCMD; 8641da177e4SLinus Torvalds #endif 8651da177e4SLinus Torvalds } 8661da177e4SLinus Torvalds } 8671da177e4SLinus Torvalds 868709b46e8SEric W. Biederman #ifdef CONFIG_COMPAT 869709b46e8SEric W. Biederman static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) 870709b46e8SEric W. Biederman { 871709b46e8SEric W. Biederman switch (cmd) { 872709b46e8SEric W. Biederman case SIOCOUTQ: 873709b46e8SEric W. Biederman case SIOCINQ: 874709b46e8SEric W. Biederman return -ENOIOCTLCMD; 875709b46e8SEric W. Biederman default: 876709b46e8SEric W. Biederman #ifdef CONFIG_IP_MROUTE 877709b46e8SEric W. Biederman return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg)); 878709b46e8SEric W. Biederman #else 879709b46e8SEric W. Biederman return -ENOIOCTLCMD; 880709b46e8SEric W. Biederman #endif 881709b46e8SEric W. Biederman } 882709b46e8SEric W. Biederman } 883709b46e8SEric W. Biederman #endif 884709b46e8SEric W. Biederman 8851da177e4SLinus Torvalds struct proto raw_prot = { 8861da177e4SLinus Torvalds .name = "RAW", 8871da177e4SLinus Torvalds .owner = THIS_MODULE, 8881da177e4SLinus Torvalds .close = raw_close, 88922dd4850SDenis V. Lunev .destroy = raw_destroy, 8901da177e4SLinus Torvalds .connect = ip4_datagram_connect, 8911da177e4SLinus Torvalds .disconnect = udp_disconnect, 8921da177e4SLinus Torvalds .ioctl = raw_ioctl, 8931da177e4SLinus Torvalds .init = raw_init, 8941da177e4SLinus Torvalds .setsockopt = raw_setsockopt, 8951da177e4SLinus Torvalds .getsockopt = raw_getsockopt, 8961da177e4SLinus Torvalds .sendmsg = raw_sendmsg, 8971da177e4SLinus Torvalds .recvmsg = raw_recvmsg, 8981da177e4SLinus Torvalds .bind = raw_bind, 8991da177e4SLinus Torvalds .backlog_rcv = raw_rcv_skb, 9008141ed9fSSteffen Klassert .release_cb = ip4_datagram_release_cb, 901fc8717baSPavel Emelyanov .hash = raw_hash_sk, 902fc8717baSPavel Emelyanov .unhash = raw_unhash_sk, 9031da177e4SLinus Torvalds .obj_size = sizeof(struct raw_sock), 904fc8717baSPavel Emelyanov .h.raw_hash = &raw_v4_hashinfo, 905543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 906543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_raw_setsockopt, 907543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_raw_getsockopt, 908709b46e8SEric W. Biederman .compat_ioctl = compat_raw_ioctl, 909543d9cfeSArnaldo Carvalho de Melo #endif 9101da177e4SLinus Torvalds }; 9111da177e4SLinus Torvalds 9121da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 9131da177e4SLinus Torvalds static struct sock *raw_get_first(struct seq_file *seq) 9141da177e4SLinus Torvalds { 9151da177e4SLinus Torvalds struct sock *sk; 9161da177e4SLinus Torvalds struct raw_iter_state *state = raw_seq_private(seq); 9171da177e4SLinus Torvalds 918b673e4dfSPavel Emelyanov for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE; 919b673e4dfSPavel Emelyanov ++state->bucket) { 920b67bfe0dSSasha Levin sk_for_each(sk, &state->h->ht[state->bucket]) 9211218854aSYOSHIFUJI Hideaki if (sock_net(sk) == seq_file_net(seq)) 9221da177e4SLinus Torvalds goto found; 9231da177e4SLinus Torvalds } 9241da177e4SLinus Torvalds sk = NULL; 9251da177e4SLinus Torvalds found: 9261da177e4SLinus Torvalds return sk; 9271da177e4SLinus Torvalds } 9281da177e4SLinus Torvalds 9291da177e4SLinus Torvalds static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk) 9301da177e4SLinus Torvalds { 9311da177e4SLinus Torvalds struct raw_iter_state *state = raw_seq_private(seq); 9321da177e4SLinus Torvalds 9331da177e4SLinus Torvalds do { 9341da177e4SLinus Torvalds sk = sk_next(sk); 9351da177e4SLinus Torvalds try_again: 9361da177e4SLinus Torvalds ; 9371218854aSYOSHIFUJI Hideaki } while (sk && sock_net(sk) != seq_file_net(seq)); 9381da177e4SLinus Torvalds 939b673e4dfSPavel Emelyanov if (!sk && ++state->bucket < RAW_HTABLE_SIZE) { 94042a73808SPavel Emelyanov sk = sk_head(&state->h->ht[state->bucket]); 9411da177e4SLinus Torvalds goto try_again; 9421da177e4SLinus Torvalds } 9431da177e4SLinus Torvalds return sk; 9441da177e4SLinus Torvalds } 9451da177e4SLinus Torvalds 9461da177e4SLinus Torvalds static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos) 9471da177e4SLinus Torvalds { 9481da177e4SLinus Torvalds struct sock *sk = raw_get_first(seq); 9491da177e4SLinus Torvalds 9501da177e4SLinus Torvalds if (sk) 9511da177e4SLinus Torvalds while (pos && (sk = raw_get_next(seq, sk)) != NULL) 9521da177e4SLinus Torvalds --pos; 9531da177e4SLinus Torvalds return pos ? NULL : sk; 9541da177e4SLinus Torvalds } 9551da177e4SLinus Torvalds 95642a73808SPavel Emelyanov void *raw_seq_start(struct seq_file *seq, loff_t *pos) 9571da177e4SLinus Torvalds { 95842a73808SPavel Emelyanov struct raw_iter_state *state = raw_seq_private(seq); 95942a73808SPavel Emelyanov 96042a73808SPavel Emelyanov read_lock(&state->h->lock); 9611da177e4SLinus Torvalds return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; 9621da177e4SLinus Torvalds } 96342a73808SPavel Emelyanov EXPORT_SYMBOL_GPL(raw_seq_start); 9641da177e4SLinus Torvalds 96542a73808SPavel Emelyanov void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos) 9661da177e4SLinus Torvalds { 9671da177e4SLinus Torvalds struct sock *sk; 9681da177e4SLinus Torvalds 9691da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 9701da177e4SLinus Torvalds sk = raw_get_first(seq); 9711da177e4SLinus Torvalds else 9721da177e4SLinus Torvalds sk = raw_get_next(seq, v); 9731da177e4SLinus Torvalds ++*pos; 9741da177e4SLinus Torvalds return sk; 9751da177e4SLinus Torvalds } 97642a73808SPavel Emelyanov EXPORT_SYMBOL_GPL(raw_seq_next); 9771da177e4SLinus Torvalds 97842a73808SPavel Emelyanov void raw_seq_stop(struct seq_file *seq, void *v) 9791da177e4SLinus Torvalds { 98042a73808SPavel Emelyanov struct raw_iter_state *state = raw_seq_private(seq); 98142a73808SPavel Emelyanov 98242a73808SPavel Emelyanov read_unlock(&state->h->lock); 9831da177e4SLinus Torvalds } 98442a73808SPavel Emelyanov EXPORT_SYMBOL_GPL(raw_seq_stop); 9851da177e4SLinus Torvalds 9868cd850efSDenis V. Lunev static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) 9871da177e4SLinus Torvalds { 9881da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sp); 989c720c7e8SEric Dumazet __be32 dest = inet->inet_daddr, 990c720c7e8SEric Dumazet src = inet->inet_rcv_saddr; 9911da177e4SLinus Torvalds __u16 destp = 0, 992c720c7e8SEric Dumazet srcp = inet->inet_num; 9931da177e4SLinus Torvalds 9948cd850efSDenis V. Lunev seq_printf(seq, "%4d: %08X:%04X %08X:%04X" 995d14c5ab6SFrancesco Fusco " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d\n", 9961da177e4SLinus Torvalds i, src, srcp, dest, destp, sp->sk_state, 99731e6d363SEric Dumazet sk_wmem_alloc_get(sp), 99831e6d363SEric Dumazet sk_rmem_alloc_get(sp), 999a7cb5a49SEric W. Biederman 0, 0L, 0, 1000a7cb5a49SEric W. Biederman from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), 1001a7cb5a49SEric W. Biederman 0, sock_i_ino(sp), 100233c732c3SWang Chen atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); 10031da177e4SLinus Torvalds } 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds static int raw_seq_show(struct seq_file *seq, void *v) 10061da177e4SLinus Torvalds { 10071da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 10088cd850efSDenis V. Lunev seq_printf(seq, " sl local_address rem_address st tx_queue " 10091da177e4SLinus Torvalds "rx_queue tr tm->when retrnsmt uid timeout " 1010cb61cb9bSEric Dumazet "inode ref pointer drops\n"); 10118cd850efSDenis V. Lunev else 10128cd850efSDenis V. Lunev raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); 10131da177e4SLinus Torvalds return 0; 10141da177e4SLinus Torvalds } 10151da177e4SLinus Torvalds 1016f690808eSStephen Hemminger static const struct seq_operations raw_seq_ops = { 10171da177e4SLinus Torvalds .start = raw_seq_start, 10181da177e4SLinus Torvalds .next = raw_seq_next, 10191da177e4SLinus Torvalds .stop = raw_seq_stop, 10201da177e4SLinus Torvalds .show = raw_seq_show, 10211da177e4SLinus Torvalds }; 10221da177e4SLinus Torvalds 10233046d767SDenis V. Lunev int raw_seq_open(struct inode *ino, struct file *file, 10243046d767SDenis V. Lunev struct raw_hashinfo *h, const struct seq_operations *ops) 10251da177e4SLinus Torvalds { 1026f51d599fSPavel Emelyanov int err; 102742a73808SPavel Emelyanov struct raw_iter_state *i; 102842a73808SPavel Emelyanov 10293046d767SDenis V. Lunev err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state)); 1030f51d599fSPavel Emelyanov if (err < 0) 1031f51d599fSPavel Emelyanov return err; 103242a73808SPavel Emelyanov 1033f51d599fSPavel Emelyanov i = raw_seq_private((struct seq_file *)file->private_data); 103442a73808SPavel Emelyanov i->h = h; 103542a73808SPavel Emelyanov return 0; 103642a73808SPavel Emelyanov } 103742a73808SPavel Emelyanov EXPORT_SYMBOL_GPL(raw_seq_open); 103842a73808SPavel Emelyanov 103942a73808SPavel Emelyanov static int raw_v4_seq_open(struct inode *inode, struct file *file) 104042a73808SPavel Emelyanov { 10413046d767SDenis V. Lunev return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops); 10421da177e4SLinus Torvalds } 10431da177e4SLinus Torvalds 10449a32144eSArjan van de Ven static const struct file_operations raw_seq_fops = { 10451da177e4SLinus Torvalds .owner = THIS_MODULE, 104642a73808SPavel Emelyanov .open = raw_v4_seq_open, 10471da177e4SLinus Torvalds .read = seq_read, 10481da177e4SLinus Torvalds .llseek = seq_lseek, 1049f51d599fSPavel Emelyanov .release = seq_release_net, 10501da177e4SLinus Torvalds }; 10511da177e4SLinus Torvalds 1052a308da16SPavel Emelyanov static __net_init int raw_init_net(struct net *net) 1053a308da16SPavel Emelyanov { 1054d4beaa66SGao feng if (!proc_create("raw", S_IRUGO, net->proc_net, &raw_seq_fops)) 1055a308da16SPavel Emelyanov return -ENOMEM; 1056a308da16SPavel Emelyanov 1057a308da16SPavel Emelyanov return 0; 1058a308da16SPavel Emelyanov } 1059a308da16SPavel Emelyanov 1060a308da16SPavel Emelyanov static __net_exit void raw_exit_net(struct net *net) 1061a308da16SPavel Emelyanov { 1062ece31ffdSGao feng remove_proc_entry("raw", net->proc_net); 1063a308da16SPavel Emelyanov } 1064a308da16SPavel Emelyanov 1065a308da16SPavel Emelyanov static __net_initdata struct pernet_operations raw_net_ops = { 1066a308da16SPavel Emelyanov .init = raw_init_net, 1067a308da16SPavel Emelyanov .exit = raw_exit_net, 1068a308da16SPavel Emelyanov }; 1069a308da16SPavel Emelyanov 10701da177e4SLinus Torvalds int __init raw_proc_init(void) 10711da177e4SLinus Torvalds { 1072a308da16SPavel Emelyanov return register_pernet_subsys(&raw_net_ops); 10731da177e4SLinus Torvalds } 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds void __init raw_proc_exit(void) 10761da177e4SLinus Torvalds { 1077a308da16SPavel Emelyanov unregister_pernet_subsys(&raw_net_ops); 10781da177e4SLinus Torvalds } 10791da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */ 1080