/* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * RAW - implementation of IP "raw" sockets. * * Authors: Ross Biro * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> * * Fixes: * Alan Cox : verify_area() fixed up * Alan Cox : ICMP error handling * Alan Cox : EMSGSIZE if you send too big a packet * Alan Cox : Now uses generic datagrams and shared * skbuff library. No more peek crashes, * no more backlogs * Alan Cox : Checks sk->broadcast. * Alan Cox : Uses skb_free_datagram/skb_copy_datagram * Alan Cox : Raw passes ip options too * Alan Cox : Setsocketopt added * Alan Cox : Fixed error return for broadcasts * Alan Cox : Removed wake_up calls * Alan Cox : Use ttl/tos * Alan Cox : Cleaned up old debugging * Alan Cox : Use new kernel side addresses * Arnt Gulbrandsen : Fixed MSG_DONTROUTE in raw sockets. * Alan Cox : BSD style RAW socket demultiplexing. * Alan Cox : Beginnings of mrouted support. * Alan Cox : Added IP_HDRINCL option. * Alan Cox : Skip broadcast check if BSDism set. * David S. Miller : New socket lookup architecture. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/types.h> #include <linux/atomic.h> #include <asm/byteorder.h> #include <asm/current.h> #include <linux/uaccess.h> #include <asm/ioctls.h> #include <linux/stddef.h> #include <linux/slab.h> #include <linux/errno.h> #include <linux/kernel.h> #include <linux/export.h> #include <linux/spinlock.h> #include <linux/sockios.h> #include <linux/socket.h> #include <linux/in.h> #include <linux/mroute.h> #include <linux/netdevice.h> #include <linux/in_route.h> #include <linux/route.h> #include <linux/skbuff.h> #include <linux/igmp.h> #include <net/net_namespace.h> #include <net/dst.h> #include <net/sock.h> #include <linux/ip.h> #include <linux/net.h> #include <net/ip.h> #include <net/icmp.h> #include <net/udp.h> #include <net/raw.h> #include <net/snmp.h> #include <net/tcp_states.h> #include <net/inet_common.h> #include <net/checksum.h> #include <net/xfrm.h> #include <linux/rtnetlink.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/netfilter.h> #include <linux/netfilter_ipv4.h> #include <linux/compat.h> #include <linux/uio.h> struct raw_frag_vec { struct msghdr *msg; union { struct icmphdr icmph; char c[1]; } hdr; int hlen; }; struct raw_hashinfo raw_v4_hashinfo = { .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock), }; EXPORT_SYMBOL_GPL(raw_v4_hashinfo); int raw_hash_sk(struct sock *sk) { struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; struct hlist_head *head; head = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)]; write_lock_bh(&h->lock); sk_add_node(sk, head); sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); write_unlock_bh(&h->lock); return 0; } EXPORT_SYMBOL_GPL(raw_hash_sk); void raw_unhash_sk(struct sock *sk) { struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; write_lock_bh(&h->lock); if (sk_del_node_init(sk)) sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); write_unlock_bh(&h->lock); } EXPORT_SYMBOL_GPL(raw_unhash_sk); struct sock *__raw_v4_lookup(struct net *net, struct sock *sk, unsigned short num, __be32 raddr, __be32 laddr, int dif) { sk_for_each_from(sk) { struct inet_sock *inet = inet_sk(sk); if (net_eq(sock_net(sk), net) && inet->inet_num == num && !(inet->inet_daddr && inet->inet_daddr != raddr) && !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) && !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)) goto found; /* gotcha */ } sk = NULL; found: return sk; } EXPORT_SYMBOL_GPL(__raw_v4_lookup); /* * 0 - deliver * 1 - block */ static int icmp_filter(const struct sock *sk, const struct sk_buff *skb) { struct icmphdr _hdr; const struct icmphdr *hdr; hdr = skb_header_pointer(skb, skb_transport_offset(skb), sizeof(_hdr), &_hdr); if (!hdr) return 1; if (hdr->type < 32) { __u32 data = raw_sk(sk)->filter.data; return ((1U << hdr->type) & data) != 0; } /* Do not block unknown ICMP types */ return 0; } /* IP input processing comes here for RAW socket delivery. * Caller owns SKB, so we must make clones. * * RFC 1122: SHOULD pass TOS value up to the transport layer. * -> It does. And not only TOS, but all IP header. */ static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash) { struct sock *sk; struct hlist_head *head; int delivered = 0; struct net *net; read_lock(&raw_v4_hashinfo.lock); head = &raw_v4_hashinfo.ht[hash]; if (hlist_empty(head)) goto out; net = dev_net(skb->dev); sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol, iph->saddr, iph->daddr, skb->dev->ifindex); while (sk) { delivered = 1; if ((iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) && ip_mc_sf_allow(sk, iph->daddr, iph->saddr, skb->dev->ifindex)) { struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); /* Not releasing hash table! */ if (clone) raw_rcv(sk, clone); } sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol, iph->saddr, iph->daddr, skb->dev->ifindex); } out: read_unlock(&raw_v4_hashinfo.lock); return delivered; } int raw_local_deliver(struct sk_buff *skb, int protocol) { int hash; struct sock *raw_sk; hash = protocol & (RAW_HTABLE_SIZE - 1); raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); /* If there maybe a raw socket we must check - if not we * don't care less */ if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash)) raw_sk = NULL; return raw_sk != NULL; } static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info) { struct inet_sock *inet = inet_sk(sk); const int type = icmp_hdr(skb)->type; const int code = icmp_hdr(skb)->code; int err = 0; int harderr = 0; if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) ipv4_sk_update_pmtu(skb, sk, info); else if (type == ICMP_REDIRECT) { ipv4_sk_redirect(skb, sk); return; } /* Report error on raw socket, if: 1. User requested ip_recverr. 2. Socket is connected (otherwise the error indication is useless without ip_recverr and error is hard. */ if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED) return; switch (type) { default: case ICMP_TIME_EXCEEDED: err = EHOSTUNREACH; break; case ICMP_SOURCE_QUENCH: return; case ICMP_PARAMETERPROB: err = EPROTO; harderr = 1; break; case ICMP_DEST_UNREACH: err = EHOSTUNREACH; if (code > NR_ICMP_UNREACH) break; err = icmp_err_convert[code].errno; harderr = icmp_err_convert[code].fatal; if (code == ICMP_FRAG_NEEDED) { harderr = inet->pmtudisc != IP_PMTUDISC_DONT; err = EMSGSIZE; } } if (inet->recverr) { const struct iphdr *iph = (const struct iphdr *)skb->data; u8 *payload = skb->data + (iph->ihl << 2); if (inet->hdrincl) payload = skb->data; ip_icmp_error(sk, skb, err, 0, info, payload); } if (inet->recverr || harderr) { sk->sk_err = err; sk->sk_error_report(sk); } } void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info) { int hash; struct sock *raw_sk; const struct iphdr *iph; struct net *net; hash = protocol & (RAW_HTABLE_SIZE - 1); read_lock(&raw_v4_hashinfo.lock); raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); if (raw_sk) { iph = (const struct iphdr *)skb->data; net = dev_net(skb->dev); while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol, iph->daddr, iph->saddr, skb->dev->ifindex)) != NULL) { raw_err(raw_sk, skb, info); raw_sk = sk_next(raw_sk); iph = (const struct iphdr *)skb->data; } } read_unlock(&raw_v4_hashinfo.lock); } static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb) { /* Charge it to the socket. */ ipv4_pktinfo_prepare(sk, skb); if (sock_queue_rcv_skb(sk, skb) < 0) { kfree_skb(skb); return NET_RX_DROP; } return NET_RX_SUCCESS; } int raw_rcv(struct sock *sk, struct sk_buff *skb) { if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) { atomic_inc(&sk->sk_drops); kfree_skb(skb); return NET_RX_DROP; } nf_reset(skb); skb_push(skb, skb->data - skb_network_header(skb)); raw_rcv_skb(sk, skb); return 0; } static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4, struct msghdr *msg, size_t length, struct rtable **rtp, unsigned int flags, const struct sockcm_cookie *sockc) { struct inet_sock *inet = inet_sk(sk); struct net *net = sock_net(sk); struct iphdr *iph; struct sk_buff *skb; unsigned int iphlen; int err; struct rtable *rt = *rtp; int hlen, tlen; if (length > rt->dst.dev->mtu) { ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, rt->dst.dev->mtu); return -EMSGSIZE; } if (flags&MSG_PROBE) goto out; hlen = LL_RESERVED_SPACE(rt->dst.dev); tlen = rt->dst.dev->needed_tailroom; skb = sock_alloc_send_skb(sk, length + hlen + tlen + 15, flags & MSG_DONTWAIT, &err); if (!skb) goto error; skb_reserve(skb, hlen); skb->priority = sk->sk_priority; skb->mark = sk->sk_mark; skb_dst_set(skb, &rt->dst); *rtp = NULL; skb_reset_network_header(skb); iph = ip_hdr(skb); skb_put(skb, length); skb->ip_summed = CHECKSUM_NONE; sock_tx_timestamp(sk, sockc->tsflags, &skb_shinfo(skb)->tx_flags); skb->transport_header = skb->network_header; err = -EFAULT; if (memcpy_from_msg(iph, msg, length)) goto error_free; iphlen = iph->ihl * 4; /* * We don't want to modify the ip header, but we do need to * be sure that it won't cause problems later along the network * stack. Specifically we want to make sure that iph->ihl is a * sane value. If ihl points beyond the length of the buffer passed * in, reject the frame as invalid */ err = -EINVAL; if (iphlen > length) goto error_free; if (iphlen >= sizeof(*iph)) { if (!iph->saddr) iph->saddr = fl4->saddr; iph->check = 0; iph->tot_len = htons(length); if (!iph->id) ip_select_ident(net, skb, NULL); iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); skb->transport_header += iphlen; if (iph->protocol == IPPROTO_ICMP && length >= iphlen + sizeof(struct icmphdr)) icmp_out_count(net, ((struct icmphdr *) skb_transport_header(skb))->type); } err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, net, sk, skb, NULL, rt->dst.dev, dst_output); if (err > 0) err = net_xmit_errno(err); if (err) goto error; out: return 0; error_free: kfree_skb(skb); error: IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS); if (err == -ENOBUFS && !inet->recverr) err = 0; return err; } static int raw_probe_proto_opt(struct raw_frag_vec *rfv, struct flowi4 *fl4) { int err; if (fl4->flowi4_proto != IPPROTO_ICMP) return 0; /* We only need the first two bytes. */ rfv->hlen = 2; err = memcpy_from_msg(rfv->hdr.c, rfv->msg, rfv->hlen); if (err) return err; fl4->fl4_icmp_type = rfv->hdr.icmph.type; fl4->fl4_icmp_code = rfv->hdr.icmph.code; return 0; } static int raw_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb) { struct raw_frag_vec *rfv = from; if (offset < rfv->hlen) { int copy = min(rfv->hlen - offset, len); if (skb->ip_summed == CHECKSUM_PARTIAL) memcpy(to, rfv->hdr.c + offset, copy); else skb->csum = csum_block_add( skb->csum, csum_partial_copy_nocheck(rfv->hdr.c + offset, to, copy, 0), odd); odd = 0; offset += copy; to += copy; len -= copy; if (!len) return 0; } offset -= rfv->hlen; return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb); } static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) { struct inet_sock *inet = inet_sk(sk); struct net *net = sock_net(sk); struct ipcm_cookie ipc; struct rtable *rt = NULL; struct flowi4 fl4; int free = 0; __be32 daddr; __be32 saddr; u8 tos; int err; struct ip_options_data opt_copy; struct raw_frag_vec rfv; err = -EMSGSIZE; if (len > 0xFFFF) goto out; /* * Check the flags. */ err = -EOPNOTSUPP; if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */ goto out; /* compatibility */ /* * Get and verify the address. */ if (msg->msg_namelen) { DECLARE_SOCKADDR(struct sockaddr_in *, usin, msg->msg_name); err = -EINVAL; if (msg->msg_namelen < sizeof(*usin)) goto out; if (usin->sin_family != AF_INET) { pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n", __func__, current->comm); err = -EAFNOSUPPORT; if (usin->sin_family) goto out; } daddr = usin->sin_addr.s_addr; /* ANK: I did not forget to get protocol from port field. * I just do not know, who uses this weirdness. * IP_HDRINCL is much more convenient. */ } else { err = -EDESTADDRREQ; if (sk->sk_state != TCP_ESTABLISHED) goto out; daddr = inet->inet_daddr; } ipc.sockc.tsflags = sk->sk_tsflags; ipc.addr = inet->inet_saddr; ipc.opt = NULL; ipc.tx_flags = 0; ipc.ttl = 0; ipc.tos = -1; ipc.oif = sk->sk_bound_dev_if; if (msg->msg_controllen) { err = ip_cmsg_send(sk, msg, &ipc, false); if (unlikely(err)) { kfree(ipc.opt); goto out; } if (ipc.opt) free = 1; } saddr = ipc.addr; ipc.addr = daddr; if (!ipc.opt) { struct ip_options_rcu *inet_opt; rcu_read_lock(); inet_opt = rcu_dereference(inet->inet_opt); if (inet_opt) { memcpy(&opt_copy, inet_opt, sizeof(*inet_opt) + inet_opt->opt.optlen); ipc.opt = &opt_copy.opt; } rcu_read_unlock(); } if (ipc.opt) { err = -EINVAL; /* Linux does not mangle headers on raw sockets, * so that IP options + IP_HDRINCL is non-sense. */ if (inet->hdrincl) goto done; if (ipc.opt->opt.srr) { if (!daddr) goto done; daddr = ipc.opt->opt.faddr; } } tos = get_rtconn_flags(&ipc, sk); if (msg->msg_flags & MSG_DONTROUTE) tos |= RTO_ONLINK; if (ipv4_is_multicast(daddr)) { if (!ipc.oif) ipc.oif = inet->mc_index; if (!saddr) saddr = inet->mc_addr; } else if (!ipc.oif) ipc.oif = inet->uc_index; flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos, RT_SCOPE_UNIVERSE, inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol, inet_sk_flowi_flags(sk) | (inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0), daddr, saddr, 0, 0, sk->sk_uid); if (!inet->hdrincl) { rfv.msg = msg; rfv.hlen = 0; err = raw_probe_proto_opt(&rfv, &fl4); if (err) goto done; } security_sk_classify_flow(sk, flowi4_to_flowi(&fl4)); rt = ip_route_output_flow(net, &fl4, sk); if (IS_ERR(rt)) { err = PTR_ERR(rt); rt = NULL; goto done; } err = -EACCES; if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST)) goto done; if (msg->msg_flags & MSG_CONFIRM) goto do_confirm; back_from_confirm: if (inet->hdrincl) err = raw_send_hdrinc(sk, &fl4, msg, len, &rt, msg->msg_flags, &ipc.sockc); else { sock_tx_timestamp(sk, ipc.sockc.tsflags, &ipc.tx_flags); if (!ipc.addr) ipc.addr = fl4.daddr; lock_sock(sk); err = ip_append_data(sk, &fl4, raw_getfrag, &rfv, len, 0, &ipc, &rt, msg->msg_flags); if (err) ip_flush_pending_frames(sk); else if (!(msg->msg_flags & MSG_MORE)) { err = ip_push_pending_frames(sk, &fl4); if (err == -ENOBUFS && !inet->recverr) err = 0; } release_sock(sk); } done: if (free) kfree(ipc.opt); ip_rt_put(rt); out: if (err < 0) return err; return len; do_confirm: dst_confirm(&rt->dst); if (!(msg->msg_flags & MSG_PROBE) || len) goto back_from_confirm; err = 0; goto done; } static void raw_close(struct sock *sk, long timeout) { /* * Raw sockets may have direct kernel references. Kill them. */ ip_ra_control(sk, 0, NULL); sk_common_release(sk); } static void raw_destroy(struct sock *sk) { lock_sock(sk); ip_flush_pending_frames(sk); release_sock(sk); } /* This gets rid of all the nasties in af_inet. -DaveM */ static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) { struct inet_sock *inet = inet_sk(sk); struct sockaddr_in *addr = (struct sockaddr_in *) uaddr; u32 tb_id = RT_TABLE_LOCAL; int ret = -EINVAL; int chk_addr_ret; if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in)) goto out; if (sk->sk_bound_dev_if) tb_id = l3mdev_fib_table_by_index(sock_net(sk), sk->sk_bound_dev_if) ? : tb_id; chk_addr_ret = inet_addr_type_table(sock_net(sk), addr->sin_addr.s_addr, tb_id); ret = -EADDRNOTAVAIL; if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL && chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST) goto out; inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) inet->inet_saddr = 0; /* Use device */ sk_dst_reset(sk); ret = 0; out: return ret; } /* * This should be easy, if there is something there * we return it, otherwise we block. */ static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock, int flags, int *addr_len) { struct inet_sock *inet = inet_sk(sk); size_t copied = 0; int err = -EOPNOTSUPP; DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name); struct sk_buff *skb; if (flags & MSG_OOB) goto out; if (flags & MSG_ERRQUEUE) { err = ip_recv_error(sk, msg, len, addr_len); goto out; } skb = skb_recv_datagram(sk, flags, noblock, &err); if (!skb) goto out; copied = skb->len; if (len < copied) { msg->msg_flags |= MSG_TRUNC; copied = len; } err = skb_copy_datagram_msg(skb, 0, msg, copied); if (err) goto done; sock_recv_ts_and_drops(msg, sk, skb); /* Copy the address. */ if (sin) { sin->sin_family = AF_INET; sin->sin_addr.s_addr = ip_hdr(skb)->saddr; sin->sin_port = 0; memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); *addr_len = sizeof(*sin); } if (inet->cmsg_flags) ip_cmsg_recv(msg, skb); if (flags & MSG_TRUNC) copied = skb->len; done: skb_free_datagram(sk, skb); out: if (err) return err; return copied; } static int raw_init(struct sock *sk) { struct raw_sock *rp = raw_sk(sk); if (inet_sk(sk)->inet_num == IPPROTO_ICMP) memset(&rp->filter, 0, sizeof(rp->filter)); return 0; } static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen) { if (optlen > sizeof(struct icmp_filter)) optlen = sizeof(struct icmp_filter); if (copy_from_user(&raw_sk(sk)->filter, optval, optlen)) return -EFAULT; return 0; } static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen) { int len, ret = -EFAULT; if (get_user(len, optlen)) goto out; ret = -EINVAL; if (len < 0) goto out; if (len > sizeof(struct icmp_filter)) len = sizeof(struct icmp_filter); ret = -EFAULT; if (put_user(len, optlen) || copy_to_user(optval, &raw_sk(sk)->filter, len)) goto out; ret = 0; out: return ret; } static int do_raw_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen) { if (optname == ICMP_FILTER) { if (inet_sk(sk)->inet_num != IPPROTO_ICMP) return -EOPNOTSUPP; else return raw_seticmpfilter(sk, optval, optlen); } return -ENOPROTOOPT; } static int raw_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen) { if (level != SOL_RAW) return ip_setsockopt(sk, level, optname, optval, optlen); return do_raw_setsockopt(sk, level, optname, optval, optlen); } #ifdef CONFIG_COMPAT static int compat_raw_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen) { if (level != SOL_RAW) return compat_ip_setsockopt(sk, level, optname, optval, optlen); return do_raw_setsockopt(sk, level, optname, optval, optlen); } #endif static int do_raw_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen) { if (optname == ICMP_FILTER) { if (inet_sk(sk)->inet_num != IPPROTO_ICMP) return -EOPNOTSUPP; else return raw_geticmpfilter(sk, optval, optlen); } return -ENOPROTOOPT; } static int raw_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen) { if (level != SOL_RAW) return ip_getsockopt(sk, level, optname, optval, optlen); return do_raw_getsockopt(sk, level, optname, optval, optlen); } #ifdef CONFIG_COMPAT static int compat_raw_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen) { if (level != SOL_RAW) return compat_ip_getsockopt(sk, level, optname, optval, optlen); return do_raw_getsockopt(sk, level, optname, optval, optlen); } #endif static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg) { switch (cmd) { case SIOCOUTQ: { int amount = sk_wmem_alloc_get(sk); return put_user(amount, (int __user *)arg); } case SIOCINQ: { struct sk_buff *skb; int amount = 0; spin_lock_bh(&sk->sk_receive_queue.lock); skb = skb_peek(&sk->sk_receive_queue); if (skb) amount = skb->len; spin_unlock_bh(&sk->sk_receive_queue.lock); return put_user(amount, (int __user *)arg); } default: #ifdef CONFIG_IP_MROUTE return ipmr_ioctl(sk, cmd, (void __user *)arg); #else return -ENOIOCTLCMD; #endif } } #ifdef CONFIG_COMPAT static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) { switch (cmd) { case SIOCOUTQ: case SIOCINQ: return -ENOIOCTLCMD; default: #ifdef CONFIG_IP_MROUTE return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg)); #else return -ENOIOCTLCMD; #endif } } #endif int raw_abort(struct sock *sk, int err) { lock_sock(sk); sk->sk_err = err; sk->sk_error_report(sk); __udp_disconnect(sk, 0); release_sock(sk); return 0; } EXPORT_SYMBOL_GPL(raw_abort); struct proto raw_prot = { .name = "RAW", .owner = THIS_MODULE, .close = raw_close, .destroy = raw_destroy, .connect = ip4_datagram_connect, .disconnect = __udp_disconnect, .ioctl = raw_ioctl, .init = raw_init, .setsockopt = raw_setsockopt, .getsockopt = raw_getsockopt, .sendmsg = raw_sendmsg, .recvmsg = raw_recvmsg, .bind = raw_bind, .backlog_rcv = raw_rcv_skb, .release_cb = ip4_datagram_release_cb, .hash = raw_hash_sk, .unhash = raw_unhash_sk, .obj_size = sizeof(struct raw_sock), .h.raw_hash = &raw_v4_hashinfo, #ifdef CONFIG_COMPAT .compat_setsockopt = compat_raw_setsockopt, .compat_getsockopt = compat_raw_getsockopt, .compat_ioctl = compat_raw_ioctl, #endif .diag_destroy = raw_abort, }; #ifdef CONFIG_PROC_FS static struct sock *raw_get_first(struct seq_file *seq) { struct sock *sk; struct raw_iter_state *state = raw_seq_private(seq); for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE; ++state->bucket) { sk_for_each(sk, &state->h->ht[state->bucket]) if (sock_net(sk) == seq_file_net(seq)) goto found; } sk = NULL; found: return sk; } static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk) { struct raw_iter_state *state = raw_seq_private(seq); do { sk = sk_next(sk); try_again: ; } while (sk && sock_net(sk) != seq_file_net(seq)); if (!sk && ++state->bucket < RAW_HTABLE_SIZE) { sk = sk_head(&state->h->ht[state->bucket]); goto try_again; } return sk; } static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos) { struct sock *sk = raw_get_first(seq); if (sk) while (pos && (sk = raw_get_next(seq, sk)) != NULL) --pos; return pos ? NULL : sk; } void *raw_seq_start(struct seq_file *seq, loff_t *pos) { struct raw_iter_state *state = raw_seq_private(seq); read_lock(&state->h->lock); return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; } EXPORT_SYMBOL_GPL(raw_seq_start); void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct sock *sk; if (v == SEQ_START_TOKEN) sk = raw_get_first(seq); else sk = raw_get_next(seq, v); ++*pos; return sk; } EXPORT_SYMBOL_GPL(raw_seq_next); void raw_seq_stop(struct seq_file *seq, void *v) { struct raw_iter_state *state = raw_seq_private(seq); read_unlock(&state->h->lock); } EXPORT_SYMBOL_GPL(raw_seq_stop); static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) { struct inet_sock *inet = inet_sk(sp); __be32 dest = inet->inet_daddr, src = inet->inet_rcv_saddr; __u16 destp = 0, srcp = inet->inet_num; seq_printf(seq, "%4d: %08X:%04X %08X:%04X" " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d\n", i, src, srcp, dest, destp, sp->sk_state, sk_wmem_alloc_get(sp), sk_rmem_alloc_get(sp), 0, 0L, 0, from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), 0, sock_i_ino(sp), atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); } static int raw_seq_show(struct seq_file *seq, void *v) { if (v == SEQ_START_TOKEN) seq_printf(seq, " sl local_address rem_address st tx_queue " "rx_queue tr tm->when retrnsmt uid timeout " "inode ref pointer drops\n"); else raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); return 0; } static const struct seq_operations raw_seq_ops = { .start = raw_seq_start, .next = raw_seq_next, .stop = raw_seq_stop, .show = raw_seq_show, }; int raw_seq_open(struct inode *ino, struct file *file, struct raw_hashinfo *h, const struct seq_operations *ops) { int err; struct raw_iter_state *i; err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state)); if (err < 0) return err; i = raw_seq_private((struct seq_file *)file->private_data); i->h = h; return 0; } EXPORT_SYMBOL_GPL(raw_seq_open); static int raw_v4_seq_open(struct inode *inode, struct file *file) { return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops); } static const struct file_operations raw_seq_fops = { .owner = THIS_MODULE, .open = raw_v4_seq_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release_net, }; static __net_init int raw_init_net(struct net *net) { if (!proc_create("raw", S_IRUGO, net->proc_net, &raw_seq_fops)) return -ENOMEM; return 0; } static __net_exit void raw_exit_net(struct net *net) { remove_proc_entry("raw", net->proc_net); } static __net_initdata struct pernet_operations raw_net_ops = { .init = raw_init_net, .exit = raw_exit_net, }; int __init raw_proc_init(void) { return register_pernet_subsys(&raw_net_ops); } void __init raw_proc_exit(void) { unregister_pernet_subsys(&raw_net_ops); } #endif /* CONFIG_PROC_FS */