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> 44*7c0f6ba6SLinus Torvalds #include <linux/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/kernel.h> 50bc3b2d7fSPaul Gortmaker #include <linux/export.h> 511da177e4SLinus Torvalds #include <linux/spinlock.h> 521da177e4SLinus Torvalds #include <linux/sockios.h> 531da177e4SLinus Torvalds #include <linux/socket.h> 541da177e4SLinus Torvalds #include <linux/in.h> 551da177e4SLinus Torvalds #include <linux/mroute.h> 561da177e4SLinus Torvalds #include <linux/netdevice.h> 571da177e4SLinus Torvalds #include <linux/in_route.h> 581da177e4SLinus Torvalds #include <linux/route.h> 591da177e4SLinus Torvalds #include <linux/skbuff.h> 60f5220d63SQuentin Armitage #include <linux/igmp.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> 81c008ba5bSHerbert Xu #include <linux/uio.h> 82c008ba5bSHerbert Xu 83c008ba5bSHerbert Xu struct raw_frag_vec { 84b61e9dccSAl Viro struct msghdr *msg; 85c008ba5bSHerbert Xu union { 86c008ba5bSHerbert Xu struct icmphdr icmph; 87c008ba5bSHerbert Xu char c[1]; 88c008ba5bSHerbert Xu } hdr; 89c008ba5bSHerbert Xu int hlen; 90c008ba5bSHerbert Xu }; 911da177e4SLinus Torvalds 92432490f9SCyrill Gorcunov struct raw_hashinfo raw_v4_hashinfo = { 93938b93adSRobert P. J. Day .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock), 94b673e4dfSPavel Emelyanov }; 95432490f9SCyrill Gorcunov EXPORT_SYMBOL_GPL(raw_v4_hashinfo); 961da177e4SLinus Torvalds 97086c653fSCraig Gallek int raw_hash_sk(struct sock *sk) 981da177e4SLinus Torvalds { 99fc8717baSPavel Emelyanov struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; 10065b4c50bSPavel Emelyanov struct hlist_head *head; 1011da177e4SLinus Torvalds 102c720c7e8SEric Dumazet head = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)]; 10365b4c50bSPavel Emelyanov 10465b4c50bSPavel Emelyanov write_lock_bh(&h->lock); 1051da177e4SLinus Torvalds sk_add_node(sk, head); 106c29a0bc4SPavel Emelyanov sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); 10765b4c50bSPavel Emelyanov write_unlock_bh(&h->lock); 108086c653fSCraig Gallek 109086c653fSCraig Gallek return 0; 11065b4c50bSPavel Emelyanov } 11165b4c50bSPavel Emelyanov EXPORT_SYMBOL_GPL(raw_hash_sk); 11265b4c50bSPavel Emelyanov 113fc8717baSPavel Emelyanov void raw_unhash_sk(struct sock *sk) 114ab70768eSPavel Emelyanov { 115fc8717baSPavel Emelyanov struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; 116fc8717baSPavel Emelyanov 117ab70768eSPavel Emelyanov write_lock_bh(&h->lock); 118ab70768eSPavel Emelyanov if (sk_del_node_init(sk)) 119c29a0bc4SPavel Emelyanov sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); 120ab70768eSPavel Emelyanov write_unlock_bh(&h->lock); 121ab70768eSPavel Emelyanov } 122ab70768eSPavel Emelyanov EXPORT_SYMBOL_GPL(raw_unhash_sk); 123ab70768eSPavel Emelyanov 124432490f9SCyrill Gorcunov struct sock *__raw_v4_lookup(struct net *net, struct sock *sk, 125be185884SPavel Emelyanov unsigned short num, __be32 raddr, __be32 laddr, int dif) 1261da177e4SLinus Torvalds { 127b67bfe0dSSasha Levin sk_for_each_from(sk) { 1281da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 1291da177e4SLinus Torvalds 130c720c7e8SEric Dumazet if (net_eq(sock_net(sk), net) && inet->inet_num == num && 131c720c7e8SEric Dumazet !(inet->inet_daddr && inet->inet_daddr != raddr) && 132c720c7e8SEric Dumazet !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) && 1331da177e4SLinus Torvalds !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)) 1341da177e4SLinus Torvalds goto found; /* gotcha */ 1351da177e4SLinus Torvalds } 1361da177e4SLinus Torvalds sk = NULL; 1371da177e4SLinus Torvalds found: 1381da177e4SLinus Torvalds return sk; 1391da177e4SLinus Torvalds } 140432490f9SCyrill Gorcunov EXPORT_SYMBOL_GPL(__raw_v4_lookup); 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds /* 1431da177e4SLinus Torvalds * 0 - deliver 1441da177e4SLinus Torvalds * 1 - block 1451da177e4SLinus Torvalds */ 146ab43ed8bSEric Dumazet static int icmp_filter(const struct sock *sk, const struct sk_buff *skb) 1471da177e4SLinus Torvalds { 148ab43ed8bSEric Dumazet struct icmphdr _hdr; 149ab43ed8bSEric Dumazet const struct icmphdr *hdr; 1501da177e4SLinus Torvalds 151ab43ed8bSEric Dumazet hdr = skb_header_pointer(skb, skb_transport_offset(skb), 152ab43ed8bSEric Dumazet sizeof(_hdr), &_hdr); 153ab43ed8bSEric Dumazet if (!hdr) 1541da177e4SLinus Torvalds return 1; 1551da177e4SLinus Torvalds 156ab43ed8bSEric Dumazet if (hdr->type < 32) { 1571da177e4SLinus Torvalds __u32 data = raw_sk(sk)->filter.data; 1581da177e4SLinus Torvalds 159ab43ed8bSEric Dumazet return ((1U << hdr->type) & data) != 0; 1601da177e4SLinus Torvalds } 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds /* Do not block unknown ICMP types */ 1631da177e4SLinus Torvalds return 0; 1641da177e4SLinus Torvalds } 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds /* IP input processing comes here for RAW socket delivery. 1671da177e4SLinus Torvalds * Caller owns SKB, so we must make clones. 1681da177e4SLinus Torvalds * 1691da177e4SLinus Torvalds * RFC 1122: SHOULD pass TOS value up to the transport layer. 1701da177e4SLinus Torvalds * -> It does. And not only TOS, but all IP header. 1711da177e4SLinus Torvalds */ 172b71d1d42SEric Dumazet static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash) 1731da177e4SLinus Torvalds { 1741da177e4SLinus Torvalds struct sock *sk; 1751da177e4SLinus Torvalds struct hlist_head *head; 176d13964f4SPatrick McHardy int delivered = 0; 177be185884SPavel Emelyanov struct net *net; 1781da177e4SLinus Torvalds 179b673e4dfSPavel Emelyanov read_lock(&raw_v4_hashinfo.lock); 180b673e4dfSPavel Emelyanov head = &raw_v4_hashinfo.ht[hash]; 1811da177e4SLinus Torvalds if (hlist_empty(head)) 1821da177e4SLinus Torvalds goto out; 183be185884SPavel Emelyanov 184c346dca1SYOSHIFUJI Hideaki net = dev_net(skb->dev); 185be185884SPavel Emelyanov sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol, 1861da177e4SLinus Torvalds iph->saddr, iph->daddr, 1871da177e4SLinus Torvalds skb->dev->ifindex); 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds while (sk) { 190d13964f4SPatrick McHardy delivered = 1; 191f5220d63SQuentin Armitage if ((iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) && 192f5220d63SQuentin Armitage ip_mc_sf_allow(sk, iph->daddr, iph->saddr, 193f5220d63SQuentin Armitage skb->dev->ifindex)) { 1941da177e4SLinus Torvalds struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds /* Not releasing hash table! */ 1971da177e4SLinus Torvalds if (clone) 1981da177e4SLinus Torvalds raw_rcv(sk, clone); 1991da177e4SLinus Torvalds } 200be185884SPavel Emelyanov sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol, 2011da177e4SLinus Torvalds iph->saddr, iph->daddr, 2021da177e4SLinus Torvalds skb->dev->ifindex); 2031da177e4SLinus Torvalds } 2041da177e4SLinus Torvalds out: 205b673e4dfSPavel Emelyanov read_unlock(&raw_v4_hashinfo.lock); 206d13964f4SPatrick McHardy return delivered; 2071da177e4SLinus Torvalds } 2081da177e4SLinus Torvalds 2097bc54c90SPavel Emelyanov int raw_local_deliver(struct sk_buff *skb, int protocol) 2107bc54c90SPavel Emelyanov { 2117bc54c90SPavel Emelyanov int hash; 2127bc54c90SPavel Emelyanov struct sock *raw_sk; 2137bc54c90SPavel Emelyanov 214b673e4dfSPavel Emelyanov hash = protocol & (RAW_HTABLE_SIZE - 1); 215b673e4dfSPavel Emelyanov raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); 2167bc54c90SPavel Emelyanov 2177bc54c90SPavel Emelyanov /* If there maybe a raw socket we must check - if not we 2187bc54c90SPavel Emelyanov * don't care less 2197bc54c90SPavel Emelyanov */ 2207bc54c90SPavel Emelyanov if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash)) 2217bc54c90SPavel Emelyanov raw_sk = NULL; 2227bc54c90SPavel Emelyanov 2237bc54c90SPavel Emelyanov return raw_sk != NULL; 2247bc54c90SPavel Emelyanov 2257bc54c90SPavel Emelyanov } 2267bc54c90SPavel Emelyanov 2277bc54c90SPavel Emelyanov static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info) 2281da177e4SLinus Torvalds { 2291da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 23088c7664fSArnaldo Carvalho de Melo const int type = icmp_hdr(skb)->type; 23188c7664fSArnaldo Carvalho de Melo const int code = icmp_hdr(skb)->code; 2321da177e4SLinus Torvalds int err = 0; 2331da177e4SLinus Torvalds int harderr = 0; 2341da177e4SLinus Torvalds 23536393395SDavid S. Miller if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) 23636393395SDavid S. Miller ipv4_sk_update_pmtu(skb, sk, info); 2378d65b119SDuan Jiong else if (type == ICMP_REDIRECT) { 23855be7a9cSDavid S. Miller ipv4_sk_redirect(skb, sk); 2398d65b119SDuan Jiong return; 2408d65b119SDuan Jiong } 24136393395SDavid S. Miller 2421da177e4SLinus Torvalds /* Report error on raw socket, if: 2431da177e4SLinus Torvalds 1. User requested ip_recverr. 2441da177e4SLinus Torvalds 2. Socket is connected (otherwise the error indication 2451da177e4SLinus Torvalds is useless without ip_recverr and error is hard. 2461da177e4SLinus Torvalds */ 2471da177e4SLinus Torvalds if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED) 2481da177e4SLinus Torvalds return; 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds switch (type) { 2511da177e4SLinus Torvalds default: 2521da177e4SLinus Torvalds case ICMP_TIME_EXCEEDED: 2531da177e4SLinus Torvalds err = EHOSTUNREACH; 2541da177e4SLinus Torvalds break; 2551da177e4SLinus Torvalds case ICMP_SOURCE_QUENCH: 2561da177e4SLinus Torvalds return; 2571da177e4SLinus Torvalds case ICMP_PARAMETERPROB: 2581da177e4SLinus Torvalds err = EPROTO; 2591da177e4SLinus Torvalds harderr = 1; 2601da177e4SLinus Torvalds break; 2611da177e4SLinus Torvalds case ICMP_DEST_UNREACH: 2621da177e4SLinus Torvalds err = EHOSTUNREACH; 2631da177e4SLinus Torvalds if (code > NR_ICMP_UNREACH) 2641da177e4SLinus Torvalds break; 2651da177e4SLinus Torvalds err = icmp_err_convert[code].errno; 2661da177e4SLinus Torvalds harderr = icmp_err_convert[code].fatal; 2671da177e4SLinus Torvalds if (code == ICMP_FRAG_NEEDED) { 2681da177e4SLinus Torvalds harderr = inet->pmtudisc != IP_PMTUDISC_DONT; 2691da177e4SLinus Torvalds err = EMSGSIZE; 2701da177e4SLinus Torvalds } 2711da177e4SLinus Torvalds } 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds if (inet->recverr) { 274b71d1d42SEric Dumazet const struct iphdr *iph = (const struct iphdr *)skb->data; 2751da177e4SLinus Torvalds u8 *payload = skb->data + (iph->ihl << 2); 2761da177e4SLinus Torvalds 2771da177e4SLinus Torvalds if (inet->hdrincl) 2781da177e4SLinus Torvalds payload = skb->data; 2791da177e4SLinus Torvalds ip_icmp_error(sk, skb, err, 0, info, payload); 2801da177e4SLinus Torvalds } 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds if (inet->recverr || harderr) { 2831da177e4SLinus Torvalds sk->sk_err = err; 2841da177e4SLinus Torvalds sk->sk_error_report(sk); 2851da177e4SLinus Torvalds } 2861da177e4SLinus Torvalds } 2871da177e4SLinus Torvalds 2887bc54c90SPavel Emelyanov void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info) 2897bc54c90SPavel Emelyanov { 2907bc54c90SPavel Emelyanov int hash; 2917bc54c90SPavel Emelyanov struct sock *raw_sk; 292b71d1d42SEric Dumazet const struct iphdr *iph; 293be185884SPavel Emelyanov struct net *net; 2947bc54c90SPavel Emelyanov 295b673e4dfSPavel Emelyanov hash = protocol & (RAW_HTABLE_SIZE - 1); 2967bc54c90SPavel Emelyanov 297b673e4dfSPavel Emelyanov read_lock(&raw_v4_hashinfo.lock); 298b673e4dfSPavel Emelyanov raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); 29900db4124SIan Morris if (raw_sk) { 300b71d1d42SEric Dumazet iph = (const struct iphdr *)skb->data; 301c346dca1SYOSHIFUJI Hideaki net = dev_net(skb->dev); 302be185884SPavel Emelyanov 303be185884SPavel Emelyanov while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol, 304be185884SPavel Emelyanov iph->daddr, iph->saddr, 3057bc54c90SPavel Emelyanov skb->dev->ifindex)) != NULL) { 3067bc54c90SPavel Emelyanov raw_err(raw_sk, skb, info); 3077bc54c90SPavel Emelyanov raw_sk = sk_next(raw_sk); 308b71d1d42SEric Dumazet iph = (const struct iphdr *)skb->data; 3097bc54c90SPavel Emelyanov } 3107bc54c90SPavel Emelyanov } 311b673e4dfSPavel Emelyanov read_unlock(&raw_v4_hashinfo.lock); 3127bc54c90SPavel Emelyanov } 3137bc54c90SPavel Emelyanov 3141da177e4SLinus Torvalds static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb) 3151da177e4SLinus Torvalds { 3161da177e4SLinus Torvalds /* Charge it to the socket. */ 3171da177e4SLinus Torvalds 318fbf8866dSShawn Bohrer ipv4_pktinfo_prepare(sk, skb); 319d826eb14SEric Dumazet if (sock_queue_rcv_skb(sk, skb) < 0) { 3201da177e4SLinus Torvalds kfree_skb(skb); 3211da177e4SLinus Torvalds return NET_RX_DROP; 3221da177e4SLinus Torvalds } 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds return NET_RX_SUCCESS; 3251da177e4SLinus Torvalds } 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds int raw_rcv(struct sock *sk, struct sk_buff *skb) 3281da177e4SLinus Torvalds { 3291da177e4SLinus Torvalds if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) { 33033c732c3SWang Chen atomic_inc(&sk->sk_drops); 3311da177e4SLinus Torvalds kfree_skb(skb); 3321da177e4SLinus Torvalds return NET_RX_DROP; 3331da177e4SLinus Torvalds } 334b59c2701SPatrick McHardy nf_reset(skb); 3351da177e4SLinus Torvalds 336d56f90a7SArnaldo Carvalho de Melo skb_push(skb, skb->data - skb_network_header(skb)); 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds raw_rcv_skb(sk, skb); 3391da177e4SLinus Torvalds return 0; 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds 34277968b78SDavid S. Miller static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4, 3437ae9abfdSAl Viro struct msghdr *msg, size_t length, 344c14ac945SSoheil Hassas Yeganeh struct rtable **rtp, unsigned int flags, 345c14ac945SSoheil Hassas Yeganeh const struct sockcm_cookie *sockc) 3461da177e4SLinus Torvalds { 3471da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 3480388b004SPavel Emelyanov struct net *net = sock_net(sk); 3491da177e4SLinus Torvalds struct iphdr *iph; 3501da177e4SLinus Torvalds struct sk_buff *skb; 351f844c74fSHerbert Xu unsigned int iphlen; 3521da177e4SLinus Torvalds int err; 3531789a640SEric Dumazet struct rtable *rt = *rtp; 35466088243SHerbert Xu int hlen, tlen; 3551da177e4SLinus Torvalds 356d8d1f30bSChangli Gao if (length > rt->dst.dev->mtu) { 35777968b78SDavid S. Miller ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, 358d8d1f30bSChangli Gao rt->dst.dev->mtu); 3591da177e4SLinus Torvalds return -EMSGSIZE; 3601da177e4SLinus Torvalds } 3611da177e4SLinus Torvalds if (flags&MSG_PROBE) 3621da177e4SLinus Torvalds goto out; 3631da177e4SLinus Torvalds 36466088243SHerbert Xu hlen = LL_RESERVED_SPACE(rt->dst.dev); 36566088243SHerbert Xu tlen = rt->dst.dev->needed_tailroom; 366f5184d26SJohannes Berg skb = sock_alloc_send_skb(sk, 36766088243SHerbert Xu length + hlen + tlen + 15, 3681da177e4SLinus Torvalds flags & MSG_DONTWAIT, &err); 36951456b29SIan Morris if (!skb) 3701da177e4SLinus Torvalds goto error; 37166088243SHerbert Xu skb_reserve(skb, hlen); 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds skb->priority = sk->sk_priority; 3744a19ec58SLaszlo Attila Toth skb->mark = sk->sk_mark; 375d8d1f30bSChangli Gao skb_dst_set(skb, &rt->dst); 3761789a640SEric Dumazet *rtp = NULL; 3771da177e4SLinus Torvalds 3787e28ecc2SArnaldo Carvalho de Melo skb_reset_network_header(skb); 379eddc9ec5SArnaldo Carvalho de Melo iph = ip_hdr(skb); 3807e28ecc2SArnaldo Carvalho de Melo skb_put(skb, length); 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds skb->ip_summed = CHECKSUM_NONE; 3831da177e4SLinus Torvalds 384c14ac945SSoheil Hassas Yeganeh sock_tx_timestamp(sk, sockc->tsflags, &skb_shinfo(skb)->tx_flags); 38511878b40SWillem de Bruijn 386b0e380b1SArnaldo Carvalho de Melo skb->transport_header = skb->network_header; 38755888dfbSNeil Horman err = -EFAULT; 38821226abbSAl Viro if (memcpy_from_msg(iph, msg, length)) 38955888dfbSNeil Horman goto error_free; 3901da177e4SLinus Torvalds 391f844c74fSHerbert Xu iphlen = iph->ihl * 4; 39255888dfbSNeil Horman 39355888dfbSNeil Horman /* 39455888dfbSNeil Horman * We don't want to modify the ip header, but we do need to 39555888dfbSNeil Horman * be sure that it won't cause problems later along the network 39655888dfbSNeil Horman * stack. Specifically we want to make sure that iph->ihl is a 39755888dfbSNeil Horman * sane value. If ihl points beyond the length of the buffer passed 39855888dfbSNeil Horman * in, reject the frame as invalid 39955888dfbSNeil Horman */ 40055888dfbSNeil Horman err = -EINVAL; 40155888dfbSNeil Horman if (iphlen > length) 40255888dfbSNeil Horman goto error_free; 40355888dfbSNeil Horman 40455888dfbSNeil Horman if (iphlen >= sizeof(*iph)) { 4051da177e4SLinus Torvalds if (!iph->saddr) 40677968b78SDavid S. Miller iph->saddr = fl4->saddr; 4071da177e4SLinus Torvalds iph->check = 0; 4081da177e4SLinus Torvalds iph->tot_len = htons(length); 4091da177e4SLinus Torvalds if (!iph->id) 410b6a7719aSHannes Frederic Sowa ip_select_ident(net, skb, NULL); 4111da177e4SLinus Torvalds 4121da177e4SLinus Torvalds iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 413027ac58eSBen Cartwright-Cox skb->transport_header += iphlen; 414027ac58eSBen Cartwright-Cox if (iph->protocol == IPPROTO_ICMP && 415027ac58eSBen Cartwright-Cox length >= iphlen + sizeof(struct icmphdr)) 4160388b004SPavel Emelyanov icmp_out_count(net, ((struct icmphdr *) 41796793b48SDavid L Stevens skb_transport_header(skb))->type); 418027ac58eSBen Cartwright-Cox } 4191da177e4SLinus Torvalds 42029a26a56SEric W. Biederman err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, 42129a26a56SEric W. Biederman net, sk, skb, NULL, rt->dst.dev, 42213206b6bSEric W. Biederman dst_output); 4231da177e4SLinus Torvalds if (err > 0) 4246ce9e7b5SEric Dumazet err = net_xmit_errno(err); 4251da177e4SLinus Torvalds if (err) 4261da177e4SLinus Torvalds goto error; 4271da177e4SLinus Torvalds out: 4281da177e4SLinus Torvalds return 0; 4291da177e4SLinus Torvalds 43055888dfbSNeil Horman error_free: 4311da177e4SLinus Torvalds kfree_skb(skb); 4321da177e4SLinus Torvalds error: 4335e38e270SPavel Emelyanov IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS); 4346ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet->recverr) 4356ce9e7b5SEric Dumazet err = 0; 4361da177e4SLinus Torvalds return err; 4371da177e4SLinus Torvalds } 4381da177e4SLinus Torvalds 439c008ba5bSHerbert Xu static int raw_probe_proto_opt(struct raw_frag_vec *rfv, struct flowi4 *fl4) 4401da177e4SLinus Torvalds { 44132b5913aSHerbert Xu int err; 4421da177e4SLinus Torvalds 44332b5913aSHerbert Xu if (fl4->flowi4_proto != IPPROTO_ICMP) 444a27b58feSHeiko Carstens return 0; 4451da177e4SLinus Torvalds 44632b5913aSHerbert Xu /* We only need the first two bytes. */ 447c008ba5bSHerbert Xu rfv->hlen = 2; 448c008ba5bSHerbert Xu 449b61e9dccSAl Viro err = memcpy_from_msg(rfv->hdr.c, rfv->msg, rfv->hlen); 45032b5913aSHerbert Xu if (err) 45132b5913aSHerbert Xu return err; 4521da177e4SLinus Torvalds 453c008ba5bSHerbert Xu fl4->fl4_icmp_type = rfv->hdr.icmph.type; 454c008ba5bSHerbert Xu fl4->fl4_icmp_code = rfv->hdr.icmph.code; 4551da177e4SLinus Torvalds 456a27b58feSHeiko Carstens return 0; 4571da177e4SLinus Torvalds } 4581da177e4SLinus Torvalds 459c008ba5bSHerbert Xu static int raw_getfrag(void *from, char *to, int offset, int len, int odd, 460c008ba5bSHerbert Xu struct sk_buff *skb) 461c008ba5bSHerbert Xu { 462c008ba5bSHerbert Xu struct raw_frag_vec *rfv = from; 463c008ba5bSHerbert Xu 464c008ba5bSHerbert Xu if (offset < rfv->hlen) { 465c008ba5bSHerbert Xu int copy = min(rfv->hlen - offset, len); 466c008ba5bSHerbert Xu 467c008ba5bSHerbert Xu if (skb->ip_summed == CHECKSUM_PARTIAL) 468c008ba5bSHerbert Xu memcpy(to, rfv->hdr.c + offset, copy); 469c008ba5bSHerbert Xu else 470c008ba5bSHerbert Xu skb->csum = csum_block_add( 471c008ba5bSHerbert Xu skb->csum, 472c008ba5bSHerbert Xu csum_partial_copy_nocheck(rfv->hdr.c + offset, 473c008ba5bSHerbert Xu to, copy, 0), 474c008ba5bSHerbert Xu odd); 475c008ba5bSHerbert Xu 476c008ba5bSHerbert Xu odd = 0; 477c008ba5bSHerbert Xu offset += copy; 478c008ba5bSHerbert Xu to += copy; 479c008ba5bSHerbert Xu len -= copy; 480c008ba5bSHerbert Xu 481c008ba5bSHerbert Xu if (!len) 482c008ba5bSHerbert Xu return 0; 483c008ba5bSHerbert Xu } 484c008ba5bSHerbert Xu 485c008ba5bSHerbert Xu offset -= rfv->hlen; 486c008ba5bSHerbert Xu 487f69e6d13SAl Viro return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb); 488c008ba5bSHerbert Xu } 489c008ba5bSHerbert Xu 4901b784140SYing Xue static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) 4911da177e4SLinus Torvalds { 4921da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 493bb191c3eSDavid Ahern struct net *net = sock_net(sk); 4941da177e4SLinus Torvalds struct ipcm_cookie ipc; 4951da177e4SLinus Torvalds struct rtable *rt = NULL; 49677968b78SDavid S. Miller struct flowi4 fl4; 4971da177e4SLinus Torvalds int free = 0; 4983ca3c68eSAl Viro __be32 daddr; 499c1d18f9fSAl Viro __be32 saddr; 5001da177e4SLinus Torvalds u8 tos; 5011da177e4SLinus Torvalds int err; 502f6d8bd05SEric Dumazet struct ip_options_data opt_copy; 503c008ba5bSHerbert Xu struct raw_frag_vec rfv; 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds err = -EMSGSIZE; 506926d4b81SJesper Juhl if (len > 0xFFFF) 5071da177e4SLinus Torvalds goto out; 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds /* 5101da177e4SLinus Torvalds * Check the flags. 5111da177e4SLinus Torvalds */ 5121da177e4SLinus Torvalds 5131da177e4SLinus Torvalds err = -EOPNOTSUPP; 5141da177e4SLinus Torvalds if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */ 5151da177e4SLinus Torvalds goto out; /* compatibility */ 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds /* 5181da177e4SLinus Torvalds * Get and verify the address. 5191da177e4SLinus Torvalds */ 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds if (msg->msg_namelen) { 522342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in *, usin, msg->msg_name); 5231da177e4SLinus Torvalds err = -EINVAL; 5241da177e4SLinus Torvalds if (msg->msg_namelen < sizeof(*usin)) 5251da177e4SLinus Torvalds goto out; 5261da177e4SLinus Torvalds if (usin->sin_family != AF_INET) { 527058bd4d2SJoe Perches pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n", 528058bd4d2SJoe Perches __func__, current->comm); 5291da177e4SLinus Torvalds err = -EAFNOSUPPORT; 5301da177e4SLinus Torvalds if (usin->sin_family) 5311da177e4SLinus Torvalds goto out; 5321da177e4SLinus Torvalds } 5331da177e4SLinus Torvalds daddr = usin->sin_addr.s_addr; 5341da177e4SLinus Torvalds /* ANK: I did not forget to get protocol from port field. 5351da177e4SLinus Torvalds * I just do not know, who uses this weirdness. 5361da177e4SLinus Torvalds * IP_HDRINCL is much more convenient. 5371da177e4SLinus Torvalds */ 5381da177e4SLinus Torvalds } else { 5391da177e4SLinus Torvalds err = -EDESTADDRREQ; 5401da177e4SLinus Torvalds if (sk->sk_state != TCP_ESTABLISHED) 5411da177e4SLinus Torvalds goto out; 542c720c7e8SEric Dumazet daddr = inet->inet_daddr; 5431da177e4SLinus Torvalds } 5441da177e4SLinus Torvalds 545c14ac945SSoheil Hassas Yeganeh ipc.sockc.tsflags = sk->sk_tsflags; 546c720c7e8SEric Dumazet ipc.addr = inet->inet_saddr; 5471da177e4SLinus Torvalds ipc.opt = NULL; 5482244d07bSOliver Hartkopp ipc.tx_flags = 0; 549aa661581SFrancesco Fusco ipc.ttl = 0; 550aa661581SFrancesco Fusco ipc.tos = -1; 5511da177e4SLinus Torvalds ipc.oif = sk->sk_bound_dev_if; 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds if (msg->msg_controllen) { 55424025c46SSoheil Hassas Yeganeh err = ip_cmsg_send(sk, msg, &ipc, false); 55591948309SEric Dumazet if (unlikely(err)) { 55691948309SEric Dumazet kfree(ipc.opt); 5571da177e4SLinus Torvalds goto out; 55891948309SEric Dumazet } 5591da177e4SLinus Torvalds if (ipc.opt) 5601da177e4SLinus Torvalds free = 1; 5611da177e4SLinus Torvalds } 5621da177e4SLinus Torvalds 5631da177e4SLinus Torvalds saddr = ipc.addr; 5641da177e4SLinus Torvalds ipc.addr = daddr; 5651da177e4SLinus Torvalds 566f6d8bd05SEric Dumazet if (!ipc.opt) { 567f6d8bd05SEric Dumazet struct ip_options_rcu *inet_opt; 568f6d8bd05SEric Dumazet 569f6d8bd05SEric Dumazet rcu_read_lock(); 570f6d8bd05SEric Dumazet inet_opt = rcu_dereference(inet->inet_opt); 571f6d8bd05SEric Dumazet if (inet_opt) { 572f6d8bd05SEric Dumazet memcpy(&opt_copy, inet_opt, 573f6d8bd05SEric Dumazet sizeof(*inet_opt) + inet_opt->opt.optlen); 574f6d8bd05SEric Dumazet ipc.opt = &opt_copy.opt; 575f6d8bd05SEric Dumazet } 576f6d8bd05SEric Dumazet rcu_read_unlock(); 577f6d8bd05SEric Dumazet } 5781da177e4SLinus Torvalds 5791da177e4SLinus Torvalds if (ipc.opt) { 5801da177e4SLinus Torvalds err = -EINVAL; 5811da177e4SLinus Torvalds /* Linux does not mangle headers on raw sockets, 5821da177e4SLinus Torvalds * so that IP options + IP_HDRINCL is non-sense. 5831da177e4SLinus Torvalds */ 5841da177e4SLinus Torvalds if (inet->hdrincl) 5851da177e4SLinus Torvalds goto done; 586f6d8bd05SEric Dumazet if (ipc.opt->opt.srr) { 5871da177e4SLinus Torvalds if (!daddr) 5881da177e4SLinus Torvalds goto done; 589f6d8bd05SEric Dumazet daddr = ipc.opt->opt.faddr; 5901da177e4SLinus Torvalds } 5911da177e4SLinus Torvalds } 592aa661581SFrancesco Fusco tos = get_rtconn_flags(&ipc, sk); 5931da177e4SLinus Torvalds if (msg->msg_flags & MSG_DONTROUTE) 5941da177e4SLinus Torvalds tos |= RTO_ONLINK; 5951da177e4SLinus Torvalds 596f97c1e0cSJoe Perches if (ipv4_is_multicast(daddr)) { 5971da177e4SLinus Torvalds if (!ipc.oif) 5981da177e4SLinus Torvalds ipc.oif = inet->mc_index; 5991da177e4SLinus Torvalds if (!saddr) 6001da177e4SLinus Torvalds saddr = inet->mc_addr; 60176e21053SErich E. Hoover } else if (!ipc.oif) 60276e21053SErich E. Hoover ipc.oif = inet->uc_index; 6031da177e4SLinus Torvalds 604ef164ae3SDavid S. Miller flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos, 605ef164ae3SDavid S. Miller RT_SCOPE_UNIVERSE, 606ef164ae3SDavid S. Miller inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol, 6070e0d44abSSteffen Klassert inet_sk_flowi_flags(sk) | 608c27c9322SChris Clark (inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0), 609e2d118a1SLorenzo Colitti daddr, saddr, 0, 0, sk->sk_uid); 610ef164ae3SDavid S. Miller 611a27b58feSHeiko Carstens if (!inet->hdrincl) { 612b61e9dccSAl Viro rfv.msg = msg; 613c008ba5bSHerbert Xu rfv.hlen = 0; 614c008ba5bSHerbert Xu 615c008ba5bSHerbert Xu err = raw_probe_proto_opt(&rfv, &fl4); 616a27b58feSHeiko Carstens if (err) 617a27b58feSHeiko Carstens goto done; 618a27b58feSHeiko Carstens } 6191da177e4SLinus Torvalds 6209d6ec938SDavid S. Miller security_sk_classify_flow(sk, flowi4_to_flowi(&fl4)); 621bb191c3eSDavid Ahern rt = ip_route_output_flow(net, &fl4, sk); 622b23dd4feSDavid S. Miller if (IS_ERR(rt)) { 623b23dd4feSDavid S. Miller err = PTR_ERR(rt); 6244910ac6cSDavid S. Miller rt = NULL; 6251da177e4SLinus Torvalds goto done; 626b23dd4feSDavid S. Miller } 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds err = -EACCES; 6291da177e4SLinus Torvalds if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST)) 6301da177e4SLinus Torvalds goto done; 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds if (msg->msg_flags & MSG_CONFIRM) 6331da177e4SLinus Torvalds goto do_confirm; 6341da177e4SLinus Torvalds back_from_confirm: 6351da177e4SLinus Torvalds 6361da177e4SLinus Torvalds if (inet->hdrincl) 6377ae9abfdSAl Viro err = raw_send_hdrinc(sk, &fl4, msg, len, 638c14ac945SSoheil Hassas Yeganeh &rt, msg->msg_flags, &ipc.sockc); 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds else { 641c14ac945SSoheil Hassas Yeganeh sock_tx_timestamp(sk, ipc.sockc.tsflags, &ipc.tx_flags); 64211878b40SWillem de Bruijn 6431da177e4SLinus Torvalds if (!ipc.addr) 64477968b78SDavid S. Miller ipc.addr = fl4.daddr; 6451da177e4SLinus Torvalds lock_sock(sk); 646c008ba5bSHerbert Xu err = ip_append_data(sk, &fl4, raw_getfrag, 647c008ba5bSHerbert Xu &rfv, len, 0, 6482e77d89bSEric Dumazet &ipc, &rt, msg->msg_flags); 6491da177e4SLinus Torvalds if (err) 6501da177e4SLinus Torvalds ip_flush_pending_frames(sk); 6516ce9e7b5SEric Dumazet else if (!(msg->msg_flags & MSG_MORE)) { 65277968b78SDavid S. Miller err = ip_push_pending_frames(sk, &fl4); 6536ce9e7b5SEric Dumazet if (err == -ENOBUFS && !inet->recverr) 6546ce9e7b5SEric Dumazet err = 0; 6556ce9e7b5SEric Dumazet } 6561da177e4SLinus Torvalds release_sock(sk); 6571da177e4SLinus Torvalds } 6581da177e4SLinus Torvalds done: 6591da177e4SLinus Torvalds if (free) 6601da177e4SLinus Torvalds kfree(ipc.opt); 6611da177e4SLinus Torvalds ip_rt_put(rt); 6621da177e4SLinus Torvalds 6635418c692SJesper Juhl out: 6645418c692SJesper Juhl if (err < 0) 6655418c692SJesper Juhl return err; 6665418c692SJesper Juhl return len; 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds do_confirm: 669d8d1f30bSChangli Gao dst_confirm(&rt->dst); 6701da177e4SLinus Torvalds if (!(msg->msg_flags & MSG_PROBE) || len) 6711da177e4SLinus Torvalds goto back_from_confirm; 6721da177e4SLinus Torvalds err = 0; 6731da177e4SLinus Torvalds goto done; 6741da177e4SLinus Torvalds } 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds static void raw_close(struct sock *sk, long timeout) 6771da177e4SLinus Torvalds { 6781da177e4SLinus Torvalds /* 67925985edcSLucas De Marchi * Raw sockets may have direct kernel references. Kill them. 6801da177e4SLinus Torvalds */ 6811da177e4SLinus Torvalds ip_ra_control(sk, 0, NULL); 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds sk_common_release(sk); 6841da177e4SLinus Torvalds } 6851da177e4SLinus Torvalds 6867d06b2e0SBrian Haley static void raw_destroy(struct sock *sk) 68722dd4850SDenis V. Lunev { 68822dd4850SDenis V. Lunev lock_sock(sk); 68922dd4850SDenis V. Lunev ip_flush_pending_frames(sk); 69022dd4850SDenis V. Lunev release_sock(sk); 69122dd4850SDenis V. Lunev } 69222dd4850SDenis V. Lunev 6931da177e4SLinus Torvalds /* This gets rid of all the nasties in af_inet. -DaveM */ 6941da177e4SLinus Torvalds static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) 6951da177e4SLinus Torvalds { 6961da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 6971da177e4SLinus Torvalds struct sockaddr_in *addr = (struct sockaddr_in *) uaddr; 698cd2c0f45SDavid Ahern u32 tb_id = RT_TABLE_LOCAL; 6991da177e4SLinus Torvalds int ret = -EINVAL; 7001da177e4SLinus Torvalds int chk_addr_ret; 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in)) 7031da177e4SLinus Torvalds goto out; 704cd2c0f45SDavid Ahern 705cd2c0f45SDavid Ahern if (sk->sk_bound_dev_if) 706cd2c0f45SDavid Ahern tb_id = l3mdev_fib_table_by_index(sock_net(sk), 707cd2c0f45SDavid Ahern sk->sk_bound_dev_if) ? : tb_id; 708cd2c0f45SDavid Ahern 709cd2c0f45SDavid Ahern chk_addr_ret = inet_addr_type_table(sock_net(sk), addr->sin_addr.s_addr, 710cd2c0f45SDavid Ahern tb_id); 711cd2c0f45SDavid Ahern 7121da177e4SLinus Torvalds ret = -EADDRNOTAVAIL; 7131da177e4SLinus Torvalds if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL && 7141da177e4SLinus Torvalds chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST) 7151da177e4SLinus Torvalds goto out; 716c720c7e8SEric Dumazet inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; 7171da177e4SLinus Torvalds if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) 718c720c7e8SEric Dumazet inet->inet_saddr = 0; /* Use device */ 7191da177e4SLinus Torvalds sk_dst_reset(sk); 7201da177e4SLinus Torvalds ret = 0; 7211da177e4SLinus Torvalds out: return ret; 7221da177e4SLinus Torvalds } 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds /* 7251da177e4SLinus Torvalds * This should be easy, if there is something there 7261da177e4SLinus Torvalds * we return it, otherwise we block. 7271da177e4SLinus Torvalds */ 7281da177e4SLinus Torvalds 7291b784140SYing Xue static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, 7301b784140SYing Xue int noblock, int flags, int *addr_len) 7311da177e4SLinus Torvalds { 7321da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sk); 7331da177e4SLinus Torvalds size_t copied = 0; 7341da177e4SLinus Torvalds int err = -EOPNOTSUPP; 735342dfc30SSteffen Hurrle DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name); 7361da177e4SLinus Torvalds struct sk_buff *skb; 7371da177e4SLinus Torvalds 7381da177e4SLinus Torvalds if (flags & MSG_OOB) 7391da177e4SLinus Torvalds goto out; 7401da177e4SLinus Torvalds 7411da177e4SLinus Torvalds if (flags & MSG_ERRQUEUE) { 74285fbaa75SHannes Frederic Sowa err = ip_recv_error(sk, msg, len, addr_len); 7431da177e4SLinus Torvalds goto out; 7441da177e4SLinus Torvalds } 7451da177e4SLinus Torvalds 7461da177e4SLinus Torvalds skb = skb_recv_datagram(sk, flags, noblock, &err); 7471da177e4SLinus Torvalds if (!skb) 7481da177e4SLinus Torvalds goto out; 7491da177e4SLinus Torvalds 7501da177e4SLinus Torvalds copied = skb->len; 7511da177e4SLinus Torvalds if (len < copied) { 7521da177e4SLinus Torvalds msg->msg_flags |= MSG_TRUNC; 7531da177e4SLinus Torvalds copied = len; 7541da177e4SLinus Torvalds } 7551da177e4SLinus Torvalds 75651f3d02bSDavid S. Miller err = skb_copy_datagram_msg(skb, 0, msg, copied); 7571da177e4SLinus Torvalds if (err) 7581da177e4SLinus Torvalds goto done; 7591da177e4SLinus Torvalds 7603b885787SNeil Horman sock_recv_ts_and_drops(msg, sk, skb); 7611da177e4SLinus Torvalds 7621da177e4SLinus Torvalds /* Copy the address. */ 7631da177e4SLinus Torvalds if (sin) { 7641da177e4SLinus Torvalds sin->sin_family = AF_INET; 765eddc9ec5SArnaldo Carvalho de Melo sin->sin_addr.s_addr = ip_hdr(skb)->saddr; 766f59fc7f3STetsuo Handa sin->sin_port = 0; 7671da177e4SLinus Torvalds memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 768bceaa902SHannes Frederic Sowa *addr_len = sizeof(*sin); 7691da177e4SLinus Torvalds } 7701da177e4SLinus Torvalds if (inet->cmsg_flags) 7711da177e4SLinus Torvalds ip_cmsg_recv(msg, skb); 7721da177e4SLinus Torvalds if (flags & MSG_TRUNC) 7731da177e4SLinus Torvalds copied = skb->len; 7741da177e4SLinus Torvalds done: 7751da177e4SLinus Torvalds skb_free_datagram(sk, skb); 7765418c692SJesper Juhl out: 7775418c692SJesper Juhl if (err) 7785418c692SJesper Juhl return err; 7795418c692SJesper Juhl return copied; 7801da177e4SLinus Torvalds } 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds static int raw_init(struct sock *sk) 7831da177e4SLinus Torvalds { 7841da177e4SLinus Torvalds struct raw_sock *rp = raw_sk(sk); 7851da177e4SLinus Torvalds 786c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num == IPPROTO_ICMP) 7871da177e4SLinus Torvalds memset(&rp->filter, 0, sizeof(rp->filter)); 7881da177e4SLinus Torvalds return 0; 7891da177e4SLinus Torvalds } 7901da177e4SLinus Torvalds 7911da177e4SLinus Torvalds static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen) 7921da177e4SLinus Torvalds { 7931da177e4SLinus Torvalds if (optlen > sizeof(struct icmp_filter)) 7941da177e4SLinus Torvalds optlen = sizeof(struct icmp_filter); 7951da177e4SLinus Torvalds if (copy_from_user(&raw_sk(sk)->filter, optval, optlen)) 7961da177e4SLinus Torvalds return -EFAULT; 7971da177e4SLinus Torvalds return 0; 7981da177e4SLinus Torvalds } 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen) 8011da177e4SLinus Torvalds { 8021da177e4SLinus Torvalds int len, ret = -EFAULT; 8031da177e4SLinus Torvalds 8041da177e4SLinus Torvalds if (get_user(len, optlen)) 8051da177e4SLinus Torvalds goto out; 8061da177e4SLinus Torvalds ret = -EINVAL; 8071da177e4SLinus Torvalds if (len < 0) 8081da177e4SLinus Torvalds goto out; 8091da177e4SLinus Torvalds if (len > sizeof(struct icmp_filter)) 8101da177e4SLinus Torvalds len = sizeof(struct icmp_filter); 8111da177e4SLinus Torvalds ret = -EFAULT; 8121da177e4SLinus Torvalds if (put_user(len, optlen) || 8131da177e4SLinus Torvalds copy_to_user(optval, &raw_sk(sk)->filter, len)) 8141da177e4SLinus Torvalds goto out; 8151da177e4SLinus Torvalds ret = 0; 8161da177e4SLinus Torvalds out: return ret; 8171da177e4SLinus Torvalds } 8181da177e4SLinus Torvalds 8193fdadf7dSDmitry Mishin static int do_raw_setsockopt(struct sock *sk, int level, int optname, 820b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 8211da177e4SLinus Torvalds { 8221da177e4SLinus Torvalds if (optname == ICMP_FILTER) { 823c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMP) 8241da177e4SLinus Torvalds return -EOPNOTSUPP; 8251da177e4SLinus Torvalds else 8261da177e4SLinus Torvalds return raw_seticmpfilter(sk, optval, optlen); 8271da177e4SLinus Torvalds } 8281da177e4SLinus Torvalds return -ENOPROTOOPT; 8291da177e4SLinus Torvalds } 8301da177e4SLinus Torvalds 8313fdadf7dSDmitry Mishin static int raw_setsockopt(struct sock *sk, int level, int optname, 832b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 8331da177e4SLinus Torvalds { 8341da177e4SLinus Torvalds if (level != SOL_RAW) 8353fdadf7dSDmitry Mishin return ip_setsockopt(sk, level, optname, optval, optlen); 8363fdadf7dSDmitry Mishin return do_raw_setsockopt(sk, level, optname, optval, optlen); 8373fdadf7dSDmitry Mishin } 8381da177e4SLinus Torvalds 8393fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 8403fdadf7dSDmitry Mishin static int compat_raw_setsockopt(struct sock *sk, int level, int optname, 841b7058842SDavid S. Miller char __user *optval, unsigned int optlen) 8423fdadf7dSDmitry Mishin { 8433fdadf7dSDmitry Mishin if (level != SOL_RAW) 844543d9cfeSArnaldo Carvalho de Melo return compat_ip_setsockopt(sk, level, optname, optval, optlen); 8453fdadf7dSDmitry Mishin return do_raw_setsockopt(sk, level, optname, optval, optlen); 8463fdadf7dSDmitry Mishin } 8473fdadf7dSDmitry Mishin #endif 8483fdadf7dSDmitry Mishin 8493fdadf7dSDmitry Mishin static int do_raw_getsockopt(struct sock *sk, int level, int optname, 8503fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 8513fdadf7dSDmitry Mishin { 8521da177e4SLinus Torvalds if (optname == ICMP_FILTER) { 853c720c7e8SEric Dumazet if (inet_sk(sk)->inet_num != IPPROTO_ICMP) 8541da177e4SLinus Torvalds return -EOPNOTSUPP; 8551da177e4SLinus Torvalds else 8561da177e4SLinus Torvalds return raw_geticmpfilter(sk, optval, optlen); 8571da177e4SLinus Torvalds } 8581da177e4SLinus Torvalds return -ENOPROTOOPT; 8591da177e4SLinus Torvalds } 8601da177e4SLinus Torvalds 8613fdadf7dSDmitry Mishin static int raw_getsockopt(struct sock *sk, int level, int optname, 8623fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 8633fdadf7dSDmitry Mishin { 8643fdadf7dSDmitry Mishin if (level != SOL_RAW) 8653fdadf7dSDmitry Mishin return ip_getsockopt(sk, level, optname, optval, optlen); 8663fdadf7dSDmitry Mishin return do_raw_getsockopt(sk, level, optname, optval, optlen); 8673fdadf7dSDmitry Mishin } 8683fdadf7dSDmitry Mishin 8693fdadf7dSDmitry Mishin #ifdef CONFIG_COMPAT 8703fdadf7dSDmitry Mishin static int compat_raw_getsockopt(struct sock *sk, int level, int optname, 8713fdadf7dSDmitry Mishin char __user *optval, int __user *optlen) 8723fdadf7dSDmitry Mishin { 8733fdadf7dSDmitry Mishin if (level != SOL_RAW) 874543d9cfeSArnaldo Carvalho de Melo return compat_ip_getsockopt(sk, level, optname, optval, optlen); 8753fdadf7dSDmitry Mishin return do_raw_getsockopt(sk, level, optname, optval, optlen); 8763fdadf7dSDmitry Mishin } 8773fdadf7dSDmitry Mishin #endif 8783fdadf7dSDmitry Mishin 8791da177e4SLinus Torvalds static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg) 8801da177e4SLinus Torvalds { 8811da177e4SLinus Torvalds switch (cmd) { 8821da177e4SLinus Torvalds case SIOCOUTQ: { 88331e6d363SEric Dumazet int amount = sk_wmem_alloc_get(sk); 88431e6d363SEric Dumazet 8851da177e4SLinus Torvalds return put_user(amount, (int __user *)arg); 8861da177e4SLinus Torvalds } 8871da177e4SLinus Torvalds case SIOCINQ: { 8881da177e4SLinus Torvalds struct sk_buff *skb; 8891da177e4SLinus Torvalds int amount = 0; 8901da177e4SLinus Torvalds 891e0f9f858SHerbert Xu spin_lock_bh(&sk->sk_receive_queue.lock); 8921da177e4SLinus Torvalds skb = skb_peek(&sk->sk_receive_queue); 89300db4124SIan Morris if (skb) 8941da177e4SLinus Torvalds amount = skb->len; 895e0f9f858SHerbert Xu spin_unlock_bh(&sk->sk_receive_queue.lock); 8961da177e4SLinus Torvalds return put_user(amount, (int __user *)arg); 8971da177e4SLinus Torvalds } 8981da177e4SLinus Torvalds 8991da177e4SLinus Torvalds default: 9001da177e4SLinus Torvalds #ifdef CONFIG_IP_MROUTE 9011da177e4SLinus Torvalds return ipmr_ioctl(sk, cmd, (void __user *)arg); 9021da177e4SLinus Torvalds #else 9031da177e4SLinus Torvalds return -ENOIOCTLCMD; 9041da177e4SLinus Torvalds #endif 9051da177e4SLinus Torvalds } 9061da177e4SLinus Torvalds } 9071da177e4SLinus Torvalds 908709b46e8SEric W. Biederman #ifdef CONFIG_COMPAT 909709b46e8SEric W. Biederman static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) 910709b46e8SEric W. Biederman { 911709b46e8SEric W. Biederman switch (cmd) { 912709b46e8SEric W. Biederman case SIOCOUTQ: 913709b46e8SEric W. Biederman case SIOCINQ: 914709b46e8SEric W. Biederman return -ENOIOCTLCMD; 915709b46e8SEric W. Biederman default: 916709b46e8SEric W. Biederman #ifdef CONFIG_IP_MROUTE 917709b46e8SEric W. Biederman return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg)); 918709b46e8SEric W. Biederman #else 919709b46e8SEric W. Biederman return -ENOIOCTLCMD; 920709b46e8SEric W. Biederman #endif 921709b46e8SEric W. Biederman } 922709b46e8SEric W. Biederman } 923709b46e8SEric W. Biederman #endif 924709b46e8SEric W. Biederman 925432490f9SCyrill Gorcunov int raw_abort(struct sock *sk, int err) 926432490f9SCyrill Gorcunov { 927432490f9SCyrill Gorcunov lock_sock(sk); 928432490f9SCyrill Gorcunov 929432490f9SCyrill Gorcunov sk->sk_err = err; 930432490f9SCyrill Gorcunov sk->sk_error_report(sk); 9313de864f8SCyrill Gorcunov __udp_disconnect(sk, 0); 932432490f9SCyrill Gorcunov 933432490f9SCyrill Gorcunov release_sock(sk); 934432490f9SCyrill Gorcunov 935432490f9SCyrill Gorcunov return 0; 936432490f9SCyrill Gorcunov } 937432490f9SCyrill Gorcunov EXPORT_SYMBOL_GPL(raw_abort); 938432490f9SCyrill Gorcunov 9391da177e4SLinus Torvalds struct proto raw_prot = { 9401da177e4SLinus Torvalds .name = "RAW", 9411da177e4SLinus Torvalds .owner = THIS_MODULE, 9421da177e4SLinus Torvalds .close = raw_close, 94322dd4850SDenis V. Lunev .destroy = raw_destroy, 9441da177e4SLinus Torvalds .connect = ip4_datagram_connect, 945286c72deSEric Dumazet .disconnect = __udp_disconnect, 9461da177e4SLinus Torvalds .ioctl = raw_ioctl, 9471da177e4SLinus Torvalds .init = raw_init, 9481da177e4SLinus Torvalds .setsockopt = raw_setsockopt, 9491da177e4SLinus Torvalds .getsockopt = raw_getsockopt, 9501da177e4SLinus Torvalds .sendmsg = raw_sendmsg, 9511da177e4SLinus Torvalds .recvmsg = raw_recvmsg, 9521da177e4SLinus Torvalds .bind = raw_bind, 9531da177e4SLinus Torvalds .backlog_rcv = raw_rcv_skb, 9548141ed9fSSteffen Klassert .release_cb = ip4_datagram_release_cb, 955fc8717baSPavel Emelyanov .hash = raw_hash_sk, 956fc8717baSPavel Emelyanov .unhash = raw_unhash_sk, 9571da177e4SLinus Torvalds .obj_size = sizeof(struct raw_sock), 958fc8717baSPavel Emelyanov .h.raw_hash = &raw_v4_hashinfo, 959543d9cfeSArnaldo Carvalho de Melo #ifdef CONFIG_COMPAT 960543d9cfeSArnaldo Carvalho de Melo .compat_setsockopt = compat_raw_setsockopt, 961543d9cfeSArnaldo Carvalho de Melo .compat_getsockopt = compat_raw_getsockopt, 962709b46e8SEric W. Biederman .compat_ioctl = compat_raw_ioctl, 963543d9cfeSArnaldo Carvalho de Melo #endif 964432490f9SCyrill Gorcunov .diag_destroy = raw_abort, 9651da177e4SLinus Torvalds }; 9661da177e4SLinus Torvalds 9671da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 9681da177e4SLinus Torvalds static struct sock *raw_get_first(struct seq_file *seq) 9691da177e4SLinus Torvalds { 9701da177e4SLinus Torvalds struct sock *sk; 9711da177e4SLinus Torvalds struct raw_iter_state *state = raw_seq_private(seq); 9721da177e4SLinus Torvalds 973b673e4dfSPavel Emelyanov for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE; 974b673e4dfSPavel Emelyanov ++state->bucket) { 975b67bfe0dSSasha Levin sk_for_each(sk, &state->h->ht[state->bucket]) 9761218854aSYOSHIFUJI Hideaki if (sock_net(sk) == seq_file_net(seq)) 9771da177e4SLinus Torvalds goto found; 9781da177e4SLinus Torvalds } 9791da177e4SLinus Torvalds sk = NULL; 9801da177e4SLinus Torvalds found: 9811da177e4SLinus Torvalds return sk; 9821da177e4SLinus Torvalds } 9831da177e4SLinus Torvalds 9841da177e4SLinus Torvalds static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk) 9851da177e4SLinus Torvalds { 9861da177e4SLinus Torvalds struct raw_iter_state *state = raw_seq_private(seq); 9871da177e4SLinus Torvalds 9881da177e4SLinus Torvalds do { 9891da177e4SLinus Torvalds sk = sk_next(sk); 9901da177e4SLinus Torvalds try_again: 9911da177e4SLinus Torvalds ; 9921218854aSYOSHIFUJI Hideaki } while (sk && sock_net(sk) != seq_file_net(seq)); 9931da177e4SLinus Torvalds 994b673e4dfSPavel Emelyanov if (!sk && ++state->bucket < RAW_HTABLE_SIZE) { 99542a73808SPavel Emelyanov sk = sk_head(&state->h->ht[state->bucket]); 9961da177e4SLinus Torvalds goto try_again; 9971da177e4SLinus Torvalds } 9981da177e4SLinus Torvalds return sk; 9991da177e4SLinus Torvalds } 10001da177e4SLinus Torvalds 10011da177e4SLinus Torvalds static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos) 10021da177e4SLinus Torvalds { 10031da177e4SLinus Torvalds struct sock *sk = raw_get_first(seq); 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds if (sk) 10061da177e4SLinus Torvalds while (pos && (sk = raw_get_next(seq, sk)) != NULL) 10071da177e4SLinus Torvalds --pos; 10081da177e4SLinus Torvalds return pos ? NULL : sk; 10091da177e4SLinus Torvalds } 10101da177e4SLinus Torvalds 101142a73808SPavel Emelyanov void *raw_seq_start(struct seq_file *seq, loff_t *pos) 10121da177e4SLinus Torvalds { 101342a73808SPavel Emelyanov struct raw_iter_state *state = raw_seq_private(seq); 101442a73808SPavel Emelyanov 101542a73808SPavel Emelyanov read_lock(&state->h->lock); 10161da177e4SLinus Torvalds return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; 10171da177e4SLinus Torvalds } 101842a73808SPavel Emelyanov EXPORT_SYMBOL_GPL(raw_seq_start); 10191da177e4SLinus Torvalds 102042a73808SPavel Emelyanov void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos) 10211da177e4SLinus Torvalds { 10221da177e4SLinus Torvalds struct sock *sk; 10231da177e4SLinus Torvalds 10241da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 10251da177e4SLinus Torvalds sk = raw_get_first(seq); 10261da177e4SLinus Torvalds else 10271da177e4SLinus Torvalds sk = raw_get_next(seq, v); 10281da177e4SLinus Torvalds ++*pos; 10291da177e4SLinus Torvalds return sk; 10301da177e4SLinus Torvalds } 103142a73808SPavel Emelyanov EXPORT_SYMBOL_GPL(raw_seq_next); 10321da177e4SLinus Torvalds 103342a73808SPavel Emelyanov void raw_seq_stop(struct seq_file *seq, void *v) 10341da177e4SLinus Torvalds { 103542a73808SPavel Emelyanov struct raw_iter_state *state = raw_seq_private(seq); 103642a73808SPavel Emelyanov 103742a73808SPavel Emelyanov read_unlock(&state->h->lock); 10381da177e4SLinus Torvalds } 103942a73808SPavel Emelyanov EXPORT_SYMBOL_GPL(raw_seq_stop); 10401da177e4SLinus Torvalds 10418cd850efSDenis V. Lunev static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) 10421da177e4SLinus Torvalds { 10431da177e4SLinus Torvalds struct inet_sock *inet = inet_sk(sp); 1044c720c7e8SEric Dumazet __be32 dest = inet->inet_daddr, 1045c720c7e8SEric Dumazet src = inet->inet_rcv_saddr; 10461da177e4SLinus Torvalds __u16 destp = 0, 1047c720c7e8SEric Dumazet srcp = inet->inet_num; 10481da177e4SLinus Torvalds 10498cd850efSDenis V. Lunev seq_printf(seq, "%4d: %08X:%04X %08X:%04X" 1050d14c5ab6SFrancesco Fusco " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d\n", 10511da177e4SLinus Torvalds i, src, srcp, dest, destp, sp->sk_state, 105231e6d363SEric Dumazet sk_wmem_alloc_get(sp), 105331e6d363SEric Dumazet sk_rmem_alloc_get(sp), 1054a7cb5a49SEric W. Biederman 0, 0L, 0, 1055a7cb5a49SEric W. Biederman from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), 1056a7cb5a49SEric W. Biederman 0, sock_i_ino(sp), 105733c732c3SWang Chen atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); 10581da177e4SLinus Torvalds } 10591da177e4SLinus Torvalds 10601da177e4SLinus Torvalds static int raw_seq_show(struct seq_file *seq, void *v) 10611da177e4SLinus Torvalds { 10621da177e4SLinus Torvalds if (v == SEQ_START_TOKEN) 10638cd850efSDenis V. Lunev seq_printf(seq, " sl local_address rem_address st tx_queue " 10641da177e4SLinus Torvalds "rx_queue tr tm->when retrnsmt uid timeout " 1065cb61cb9bSEric Dumazet "inode ref pointer drops\n"); 10668cd850efSDenis V. Lunev else 10678cd850efSDenis V. Lunev raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); 10681da177e4SLinus Torvalds return 0; 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds 1071f690808eSStephen Hemminger static const struct seq_operations raw_seq_ops = { 10721da177e4SLinus Torvalds .start = raw_seq_start, 10731da177e4SLinus Torvalds .next = raw_seq_next, 10741da177e4SLinus Torvalds .stop = raw_seq_stop, 10751da177e4SLinus Torvalds .show = raw_seq_show, 10761da177e4SLinus Torvalds }; 10771da177e4SLinus Torvalds 10783046d767SDenis V. Lunev int raw_seq_open(struct inode *ino, struct file *file, 10793046d767SDenis V. Lunev struct raw_hashinfo *h, const struct seq_operations *ops) 10801da177e4SLinus Torvalds { 1081f51d599fSPavel Emelyanov int err; 108242a73808SPavel Emelyanov struct raw_iter_state *i; 108342a73808SPavel Emelyanov 10843046d767SDenis V. Lunev err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state)); 1085f51d599fSPavel Emelyanov if (err < 0) 1086f51d599fSPavel Emelyanov return err; 108742a73808SPavel Emelyanov 1088f51d599fSPavel Emelyanov i = raw_seq_private((struct seq_file *)file->private_data); 108942a73808SPavel Emelyanov i->h = h; 109042a73808SPavel Emelyanov return 0; 109142a73808SPavel Emelyanov } 109242a73808SPavel Emelyanov EXPORT_SYMBOL_GPL(raw_seq_open); 109342a73808SPavel Emelyanov 109442a73808SPavel Emelyanov static int raw_v4_seq_open(struct inode *inode, struct file *file) 109542a73808SPavel Emelyanov { 10963046d767SDenis V. Lunev return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops); 10971da177e4SLinus Torvalds } 10981da177e4SLinus Torvalds 10999a32144eSArjan van de Ven static const struct file_operations raw_seq_fops = { 11001da177e4SLinus Torvalds .owner = THIS_MODULE, 110142a73808SPavel Emelyanov .open = raw_v4_seq_open, 11021da177e4SLinus Torvalds .read = seq_read, 11031da177e4SLinus Torvalds .llseek = seq_lseek, 1104f51d599fSPavel Emelyanov .release = seq_release_net, 11051da177e4SLinus Torvalds }; 11061da177e4SLinus Torvalds 1107a308da16SPavel Emelyanov static __net_init int raw_init_net(struct net *net) 1108a308da16SPavel Emelyanov { 1109d4beaa66SGao feng if (!proc_create("raw", S_IRUGO, net->proc_net, &raw_seq_fops)) 1110a308da16SPavel Emelyanov return -ENOMEM; 1111a308da16SPavel Emelyanov 1112a308da16SPavel Emelyanov return 0; 1113a308da16SPavel Emelyanov } 1114a308da16SPavel Emelyanov 1115a308da16SPavel Emelyanov static __net_exit void raw_exit_net(struct net *net) 1116a308da16SPavel Emelyanov { 1117ece31ffdSGao feng remove_proc_entry("raw", net->proc_net); 1118a308da16SPavel Emelyanov } 1119a308da16SPavel Emelyanov 1120a308da16SPavel Emelyanov static __net_initdata struct pernet_operations raw_net_ops = { 1121a308da16SPavel Emelyanov .init = raw_init_net, 1122a308da16SPavel Emelyanov .exit = raw_exit_net, 1123a308da16SPavel Emelyanov }; 1124a308da16SPavel Emelyanov 11251da177e4SLinus Torvalds int __init raw_proc_init(void) 11261da177e4SLinus Torvalds { 1127a308da16SPavel Emelyanov return register_pernet_subsys(&raw_net_ops); 11281da177e4SLinus Torvalds } 11291da177e4SLinus Torvalds 11301da177e4SLinus Torvalds void __init raw_proc_exit(void) 11311da177e4SLinus Torvalds { 1132a308da16SPavel Emelyanov unregister_pernet_subsys(&raw_net_ops); 11331da177e4SLinus Torvalds } 11341da177e4SLinus Torvalds #endif /* CONFIG_PROC_FS */ 1135