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net/ipv4/raw.c
25.4 KB
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/* * 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. * |
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* Authors: Ross Biro |
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* 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. */ |
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#include <linux/types.h> |
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#include <linux/atomic.h> |
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#include <asm/byteorder.h> #include <asm/current.h> #include <asm/uaccess.h> #include <asm/ioctls.h> |
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#include <linux/stddef.h> #include <linux/slab.h> #include <linux/errno.h> #include <linux/aio.h> #include <linux/kernel.h> |
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#include <linux/export.h> |
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#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> |
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#include <linux/skbuff.h> |
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#include <linux/igmp.h> |
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#include <net/net_namespace.h> |
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#include <net/dst.h> #include <net/sock.h> |
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#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> |
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#include <net/tcp_states.h> |
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#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> |
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#include <linux/compat.h> |
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#include <linux/uio.h> struct raw_frag_vec { |
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struct msghdr *msg; |
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union { struct icmphdr icmph; char c[1]; } hdr; int hlen; }; |
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static struct raw_hashinfo raw_v4_hashinfo = { |
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.lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock), |
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}; |
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void raw_hash_sk(struct sock *sk) |
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{ |
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struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; |
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struct hlist_head *head; |
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head = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)]; |
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write_lock_bh(&h->lock); |
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sk_add_node(sk, head); |
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sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); |
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write_unlock_bh(&h->lock); } EXPORT_SYMBOL_GPL(raw_hash_sk); |
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void raw_unhash_sk(struct sock *sk) |
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{ |
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struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; |
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write_lock_bh(&h->lock); if (sk_del_node_init(sk)) |
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sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |
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write_unlock_bh(&h->lock); } EXPORT_SYMBOL_GPL(raw_unhash_sk); |
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static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk, unsigned short num, __be32 raddr, __be32 laddr, int dif) |
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{ |
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sk_for_each_from(sk) { |
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struct inet_sock *inet = inet_sk(sk); |
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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) && |
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!(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)) goto found; /* gotcha */ } sk = NULL; found: return sk; } /* * 0 - deliver * 1 - block */ |
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static int icmp_filter(const struct sock *sk, const struct sk_buff *skb) |
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{ |
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struct icmphdr _hdr; const struct icmphdr *hdr; |
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hdr = skb_header_pointer(skb, skb_transport_offset(skb), sizeof(_hdr), &_hdr); if (!hdr) |
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return 1; |
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if (hdr->type < 32) { |
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__u32 data = raw_sk(sk)->filter.data; |
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return ((1U << hdr->type) & data) != 0; |
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} /* 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. */ |
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static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash) |
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{ struct sock *sk; struct hlist_head *head; |
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int delivered = 0; |
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struct net *net; |
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read_lock(&raw_v4_hashinfo.lock); head = &raw_v4_hashinfo.ht[hash]; |
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if (hlist_empty(head)) goto out; |
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net = dev_net(skb->dev); |
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sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol, |
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iph->saddr, iph->daddr, skb->dev->ifindex); while (sk) { |
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delivered = 1; |
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if ((iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) && ip_mc_sf_allow(sk, iph->daddr, iph->saddr, skb->dev->ifindex)) { |
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struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); /* Not releasing hash table! */ if (clone) raw_rcv(sk, clone); } |
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sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol, |
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iph->saddr, iph->daddr, skb->dev->ifindex); } out: |
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read_unlock(&raw_v4_hashinfo.lock); |
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return delivered; |
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} |
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int raw_local_deliver(struct sk_buff *skb, int protocol) { int hash; struct sock *raw_sk; |
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hash = protocol & (RAW_HTABLE_SIZE - 1); raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); |
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/* 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) |
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{ struct inet_sock *inet = inet_sk(sk); |
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const int type = icmp_hdr(skb)->type; const int code = icmp_hdr(skb)->code; |
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int err = 0; int harderr = 0; |
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if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) ipv4_sk_update_pmtu(skb, sk, info); |
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else if (type == ICMP_REDIRECT) { |
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ipv4_sk_redirect(skb, sk); |
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return; } |
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/* 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) { |
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const struct iphdr *iph = (const struct iphdr *)skb->data; |
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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); } } |
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void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info) { int hash; struct sock *raw_sk; |
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const struct iphdr *iph; |
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struct net *net; |
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hash = protocol & (RAW_HTABLE_SIZE - 1); |
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read_lock(&raw_v4_hashinfo.lock); raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); |
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if (raw_sk != NULL) { |
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iph = (const struct iphdr *)skb->data; |
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net = dev_net(skb->dev); |
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while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol, iph->daddr, iph->saddr, |
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skb->dev->ifindex)) != NULL) { raw_err(raw_sk, skb, info); raw_sk = sk_next(raw_sk); |
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iph = (const struct iphdr *)skb->data; |
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} } |
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read_unlock(&raw_v4_hashinfo.lock); |
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} |
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static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb) |
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{ /* Charge it to the socket. */ |
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ipv4_pktinfo_prepare(sk, skb); |
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if (sock_queue_rcv_skb(sk, skb) < 0) { |
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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)) { |
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atomic_inc(&sk->sk_drops); |
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kfree_skb(skb); return NET_RX_DROP; } |
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nf_reset(skb); |
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skb_push(skb, skb->data - skb_network_header(skb)); |
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raw_rcv_skb(sk, skb); return 0; } |
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static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4, void *from, size_t length, struct rtable **rtp, unsigned int flags) |
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{ struct inet_sock *inet = inet_sk(sk); |
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struct net *net = sock_net(sk); |
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struct iphdr *iph; struct sk_buff *skb; |
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unsigned int iphlen; |
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int err; |
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struct rtable *rt = *rtp; |
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int hlen, tlen; |
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if (length > rt->dst.dev->mtu) { |
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ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, |
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rt->dst.dev->mtu); |
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return -EMSGSIZE; } if (flags&MSG_PROBE) goto out; |
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hlen = LL_RESERVED_SPACE(rt->dst.dev); tlen = rt->dst.dev->needed_tailroom; |
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skb = sock_alloc_send_skb(sk, |
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length + hlen + tlen + 15, |
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flags & MSG_DONTWAIT, &err); |
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if (skb == NULL) |
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goto error; |
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skb_reserve(skb, hlen); |
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skb->priority = sk->sk_priority; |
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skb->mark = sk->sk_mark; |
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skb_dst_set(skb, &rt->dst); |
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*rtp = NULL; |
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|
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skb_reset_network_header(skb); |
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iph = ip_hdr(skb); |
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skb_put(skb, length); |
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skb->ip_summed = CHECKSUM_NONE; |
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sock_tx_timestamp(sk, &skb_shinfo(skb)->tx_flags); |
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skb->transport_header = skb->network_header; |
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err = -EFAULT; if (memcpy_fromiovecend((void *)iph, from, 0, length)) goto error_free; |
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|
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iphlen = iph->ihl * 4; |
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/* * 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)) { |
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if (!iph->saddr) |
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iph->saddr = fl4->saddr; |
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iph->check = 0; iph->tot_len = htons(length); if (!iph->id) |
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ip_select_ident(skb, NULL); |
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iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); } |
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if (iph->protocol == IPPROTO_ICMP) |
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icmp_out_count(net, ((struct icmphdr *) |
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skb_transport_header(skb))->type); |
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|
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err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, skb, NULL, |
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rt->dst.dev, dst_output); |
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if (err > 0) |
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err = net_xmit_errno(err); |
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if (err) goto error; out: return 0; |
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error_free: |
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kfree_skb(skb); error: |
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IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS); |
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if (err == -ENOBUFS && !inet->recverr) err = 0; |
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414 |
return err; |
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} |
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static int raw_probe_proto_opt(struct raw_frag_vec *rfv, struct flowi4 *fl4) |
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{ |
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int err; |
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|
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if (fl4->flowi4_proto != IPPROTO_ICMP) |
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return 0; |
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|
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/* We only need the first two bytes. */ |
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rfv->hlen = 2; |
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err = memcpy_from_msg(rfv->hdr.c, rfv->msg, rfv->hlen); |
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if (err) return err; |
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fl4->fl4_icmp_type = rfv->hdr.icmph.type; fl4->fl4_icmp_code = rfv->hdr.icmph.code; |
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|
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return 0; |
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} |
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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; |
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return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb); |
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461 |
} |
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static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, size_t len) { struct inet_sock *inet = inet_sk(sk); struct ipcm_cookie ipc; struct rtable *rt = NULL; |
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struct flowi4 fl4; |
1da177e4c
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int free = 0; |
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__be32 daddr; |
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__be32 saddr; |
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u8 tos; int err; |
f6d8bd051
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474 |
struct ip_options_data opt_copy; |
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struct raw_frag_vec rfv; |
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err = -EMSGSIZE; |
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478 |
if (len > 0xFFFF) |
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goto out; /* * Check the flags. */ err = -EOPNOTSUPP; if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */ goto out; /* compatibility */ |
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488 |
|
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/* |
e905a9eda
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* Get and verify the address. |
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491 492 493 |
*/ if (msg->msg_namelen) { |
342dfc306
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494 |
DECLARE_SOCKADDR(struct sockaddr_in *, usin, msg->msg_name); |
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|
495 496 497 498 |
err = -EINVAL; if (msg->msg_namelen < sizeof(*usin)) goto out; if (usin->sin_family != AF_INET) { |
058bd4d2a
|
499 500 501 |
pr_info_once("%s: %s forgot to set AF_INET. Fix it! ", __func__, current->comm); |
1da177e4c
|
502 503 504 505 506 507 508 509 510 511 512 |
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; |
e905a9eda
|
513 |
if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4c
|
514 |
goto out; |
c720c7e83
|
515 |
daddr = inet->inet_daddr; |
1da177e4c
|
516 |
} |
c720c7e83
|
517 |
ipc.addr = inet->inet_saddr; |
1da177e4c
|
518 |
ipc.opt = NULL; |
2244d07bf
|
519 |
ipc.tx_flags = 0; |
aa6615814
|
520 521 |
ipc.ttl = 0; ipc.tos = -1; |
1da177e4c
|
522 523 524 |
ipc.oif = sk->sk_bound_dev_if; if (msg->msg_controllen) { |
c8e6ad082
|
525 |
err = ip_cmsg_send(sock_net(sk), msg, &ipc, false); |
1da177e4c
|
526 527 528 529 530 531 532 533 |
if (err) goto out; if (ipc.opt) free = 1; } saddr = ipc.addr; ipc.addr = daddr; |
f6d8bd051
|
534 535 536 537 538 539 540 541 542 543 544 545 |
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(); } |
1da177e4c
|
546 547 548 549 550 551 552 553 |
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; |
f6d8bd051
|
554 |
if (ipc.opt->opt.srr) { |
1da177e4c
|
555 556 |
if (!daddr) goto done; |
f6d8bd051
|
557 |
daddr = ipc.opt->opt.faddr; |
1da177e4c
|
558 559 |
} } |
aa6615814
|
560 |
tos = get_rtconn_flags(&ipc, sk); |
1da177e4c
|
561 562 |
if (msg->msg_flags & MSG_DONTROUTE) tos |= RTO_ONLINK; |
f97c1e0c6
|
563 |
if (ipv4_is_multicast(daddr)) { |
1da177e4c
|
564 565 566 567 |
if (!ipc.oif) ipc.oif = inet->mc_index; if (!saddr) saddr = inet->mc_addr; |
76e21053b
|
568 569 |
} else if (!ipc.oif) ipc.oif = inet->uc_index; |
1da177e4c
|
570 |
|
77968b782
|
571 572 573 |
flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos, RT_SCOPE_UNIVERSE, inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol, |
0e0d44ab4
|
574 |
inet_sk_flowi_flags(sk) | |
c27c9322d
|
575 |
(inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0), |
47670b767
|
576 |
daddr, saddr, 0, 0); |
ef164ae35
|
577 |
|
77968b782
|
578 |
if (!inet->hdrincl) { |
b61e9dcc5
|
579 |
rfv.msg = msg; |
c008ba5bd
|
580 581 582 |
rfv.hlen = 0; err = raw_probe_proto_opt(&rfv, &fl4); |
77968b782
|
583 |
if (err) |
b23dd4fe4
|
584 |
goto done; |
77968b782
|
585 586 587 588 589 590 591 592 |
} security_sk_classify_flow(sk, flowi4_to_flowi(&fl4)); rt = ip_route_output_flow(sock_net(sk), &fl4, sk); if (IS_ERR(rt)) { err = PTR_ERR(rt); rt = NULL; goto done; |
1da177e4c
|
593 |
} |
1da177e4c
|
594 595 596 597 598 599 600 601 602 603 |
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) |
c0371da60
|
604 605 |
/* XXX: stripping const */ err = raw_send_hdrinc(sk, &fl4, (struct iovec *)msg->msg_iter.iov, len, |
77968b782
|
606 |
&rt, msg->msg_flags); |
e905a9eda
|
607 |
|
1da177e4c
|
608 |
else { |
11878b40e
|
609 |
sock_tx_timestamp(sk, &ipc.tx_flags); |
1da177e4c
|
610 |
if (!ipc.addr) |
77968b782
|
611 |
ipc.addr = fl4.daddr; |
1da177e4c
|
612 |
lock_sock(sk); |
c008ba5bd
|
613 614 |
err = ip_append_data(sk, &fl4, raw_getfrag, &rfv, len, 0, |
77968b782
|
615 |
&ipc, &rt, msg->msg_flags); |
1da177e4c
|
616 617 |
if (err) ip_flush_pending_frames(sk); |
6ce9e7b5f
|
618 |
else if (!(msg->msg_flags & MSG_MORE)) { |
77968b782
|
619 |
err = ip_push_pending_frames(sk, &fl4); |
6ce9e7b5f
|
620 621 622 |
if (err == -ENOBUFS && !inet->recverr) err = 0; } |
1da177e4c
|
623 624 625 626 627 628 |
release_sock(sk); } done: if (free) kfree(ipc.opt); ip_rt_put(rt); |
5418c6926
|
629 630 631 632 |
out: if (err < 0) return err; return len; |
1da177e4c
|
633 634 |
do_confirm: |
d8d1f30b9
|
635 |
dst_confirm(&rt->dst); |
1da177e4c
|
636 637 638 639 640 641 642 643 |
if (!(msg->msg_flags & MSG_PROBE) || len) goto back_from_confirm; err = 0; goto done; } static void raw_close(struct sock *sk, long timeout) { |
e905a9eda
|
644 |
/* |
25985edce
|
645 |
* Raw sockets may have direct kernel references. Kill them. |
1da177e4c
|
646 647 648 649 650 |
*/ ip_ra_control(sk, 0, NULL); sk_common_release(sk); } |
7d06b2e05
|
651 |
static void raw_destroy(struct sock *sk) |
22dd48502
|
652 653 654 655 |
{ lock_sock(sk); ip_flush_pending_frames(sk); release_sock(sk); |
22dd48502
|
656 |
} |
1da177e4c
|
657 658 659 660 661 662 663 664 665 666 |
/* 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; int ret = -EINVAL; int chk_addr_ret; if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in)) goto out; |
3b1e0a655
|
667 |
chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr); |
1da177e4c
|
668 669 670 671 |
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; |
c720c7e83
|
672 |
inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; |
1da177e4c
|
673 |
if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) |
c720c7e83
|
674 |
inet->inet_saddr = 0; /* Use device */ |
1da177e4c
|
675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 |
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 kiocb *iocb, 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; |
342dfc306
|
691 |
DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name); |
1da177e4c
|
692 693 694 695 |
struct sk_buff *skb; if (flags & MSG_OOB) goto out; |
1da177e4c
|
696 |
if (flags & MSG_ERRQUEUE) { |
85fbaa750
|
697 |
err = ip_recv_error(sk, msg, len, addr_len); |
1da177e4c
|
698 699 700 701 702 703 704 705 706 707 708 709 |
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; } |
51f3d02b9
|
710 |
err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4c
|
711 712 |
if (err) goto done; |
3b885787e
|
713 |
sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4c
|
714 715 716 717 |
/* Copy the address. */ if (sin) { sin->sin_family = AF_INET; |
eddc9ec53
|
718 |
sin->sin_addr.s_addr = ip_hdr(skb)->saddr; |
f59fc7f30
|
719 |
sin->sin_port = 0; |
1da177e4c
|
720 |
memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); |
bceaa9024
|
721 |
*addr_len = sizeof(*sin); |
1da177e4c
|
722 723 724 725 726 727 728 |
} if (inet->cmsg_flags) ip_cmsg_recv(msg, skb); if (flags & MSG_TRUNC) copied = skb->len; done: skb_free_datagram(sk, skb); |
5418c6926
|
729 730 731 732 |
out: if (err) return err; return copied; |
1da177e4c
|
733 734 735 736 737 |
} static int raw_init(struct sock *sk) { struct raw_sock *rp = raw_sk(sk); |
c720c7e83
|
738 |
if (inet_sk(sk)->inet_num == IPPROTO_ICMP) |
1da177e4c
|
739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 |
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; } |
3fdadf7d2
|
770 |
static int do_raw_setsockopt(struct sock *sk, int level, int optname, |
b7058842c
|
771 |
char __user *optval, unsigned int optlen) |
1da177e4c
|
772 |
{ |
1da177e4c
|
773 |
if (optname == ICMP_FILTER) { |
c720c7e83
|
774 |
if (inet_sk(sk)->inet_num != IPPROTO_ICMP) |
1da177e4c
|
775 776 777 778 779 780 |
return -EOPNOTSUPP; else return raw_seticmpfilter(sk, optval, optlen); } return -ENOPROTOOPT; } |
3fdadf7d2
|
781 |
static int raw_setsockopt(struct sock *sk, int level, int optname, |
b7058842c
|
782 |
char __user *optval, unsigned int optlen) |
1da177e4c
|
783 784 |
{ if (level != SOL_RAW) |
3fdadf7d2
|
785 786 787 |
return ip_setsockopt(sk, level, optname, optval, optlen); return do_raw_setsockopt(sk, level, optname, optval, optlen); } |
1da177e4c
|
788 |
|
3fdadf7d2
|
789 790 |
#ifdef CONFIG_COMPAT static int compat_raw_setsockopt(struct sock *sk, int level, int optname, |
b7058842c
|
791 |
char __user *optval, unsigned int optlen) |
3fdadf7d2
|
792 793 |
{ if (level != SOL_RAW) |
543d9cfee
|
794 |
return compat_ip_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d2
|
795 796 797 798 799 800 801 |
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) { |
1da177e4c
|
802 |
if (optname == ICMP_FILTER) { |
c720c7e83
|
803 |
if (inet_sk(sk)->inet_num != IPPROTO_ICMP) |
1da177e4c
|
804 805 806 807 808 809 |
return -EOPNOTSUPP; else return raw_geticmpfilter(sk, optval, optlen); } return -ENOPROTOOPT; } |
3fdadf7d2
|
810 811 812 813 814 815 816 817 818 819 |
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, |
543d9cfee
|
820 |
char __user *optval, int __user *optlen) |
3fdadf7d2
|
821 822 |
{ if (level != SOL_RAW) |
543d9cfee
|
823 |
return compat_ip_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d2
|
824 825 826 |
return do_raw_getsockopt(sk, level, optname, optval, optlen); } #endif |
1da177e4c
|
827 828 829 |
static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg) { switch (cmd) { |
4500ebf8d
|
830 831 |
case SIOCOUTQ: { int amount = sk_wmem_alloc_get(sk); |
31e6d363a
|
832 |
|
4500ebf8d
|
833 834 835 836 837 838 839 840 841 842 843 844 845 |
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 != NULL) amount = skb->len; spin_unlock_bh(&sk->sk_receive_queue.lock); return put_user(amount, (int __user *)arg); } |
1da177e4c
|
846 |
|
4500ebf8d
|
847 |
default: |
1da177e4c
|
848 |
#ifdef CONFIG_IP_MROUTE |
4500ebf8d
|
849 |
return ipmr_ioctl(sk, cmd, (void __user *)arg); |
1da177e4c
|
850 |
#else |
4500ebf8d
|
851 |
return -ENOIOCTLCMD; |
1da177e4c
|
852 853 854 |
#endif } } |
709b46e8d
|
855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 |
#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 |
1da177e4c
|
871 |
struct proto raw_prot = { |
543d9cfee
|
872 873 874 |
.name = "RAW", .owner = THIS_MODULE, .close = raw_close, |
22dd48502
|
875 |
.destroy = raw_destroy, |
543d9cfee
|
876 877 878 879 880 881 882 883 884 885 |
.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, |
8141ed9fc
|
886 |
.release_cb = ip4_datagram_release_cb, |
fc8717baa
|
887 888 |
.hash = raw_hash_sk, .unhash = raw_unhash_sk, |
543d9cfee
|
889 |
.obj_size = sizeof(struct raw_sock), |
fc8717baa
|
890 |
.h.raw_hash = &raw_v4_hashinfo, |
3fdadf7d2
|
891 |
#ifdef CONFIG_COMPAT |
543d9cfee
|
892 893 |
.compat_setsockopt = compat_raw_setsockopt, .compat_getsockopt = compat_raw_getsockopt, |
709b46e8d
|
894 |
.compat_ioctl = compat_raw_ioctl, |
3fdadf7d2
|
895 |
#endif |
1da177e4c
|
896 897 898 |
}; #ifdef CONFIG_PROC_FS |
1da177e4c
|
899 900 901 |
static struct sock *raw_get_first(struct seq_file *seq) { struct sock *sk; |
5a5f3a8db
|
902 |
struct raw_iter_state *state = raw_seq_private(seq); |
1da177e4c
|
903 |
|
b673e4dfc
|
904 905 |
for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE; ++state->bucket) { |
b67bfe0d4
|
906 |
sk_for_each(sk, &state->h->ht[state->bucket]) |
1218854af
|
907 |
if (sock_net(sk) == seq_file_net(seq)) |
1da177e4c
|
908 909 910 911 912 913 914 915 916 |
goto found; } sk = NULL; found: return sk; } static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk) { |
5a5f3a8db
|
917 |
struct raw_iter_state *state = raw_seq_private(seq); |
1da177e4c
|
918 919 920 921 922 |
do { sk = sk_next(sk); try_again: ; |
1218854af
|
923 |
} while (sk && sock_net(sk) != seq_file_net(seq)); |
1da177e4c
|
924 |
|
b673e4dfc
|
925 |
if (!sk && ++state->bucket < RAW_HTABLE_SIZE) { |
42a73808e
|
926 |
sk = sk_head(&state->h->ht[state->bucket]); |
1da177e4c
|
927 928 929 930 931 932 933 934 935 936 937 938 939 940 |
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; } |
42a73808e
|
941 |
void *raw_seq_start(struct seq_file *seq, loff_t *pos) |
1da177e4c
|
942 |
{ |
42a73808e
|
943 944 945 |
struct raw_iter_state *state = raw_seq_private(seq); read_lock(&state->h->lock); |
1da177e4c
|
946 947 |
return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; } |
42a73808e
|
948 |
EXPORT_SYMBOL_GPL(raw_seq_start); |
1da177e4c
|
949 |
|
42a73808e
|
950 |
void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
1da177e4c
|
951 952 953 954 955 956 957 958 959 960 |
{ struct sock *sk; if (v == SEQ_START_TOKEN) sk = raw_get_first(seq); else sk = raw_get_next(seq, v); ++*pos; return sk; } |
42a73808e
|
961 |
EXPORT_SYMBOL_GPL(raw_seq_next); |
1da177e4c
|
962 |
|
42a73808e
|
963 |
void raw_seq_stop(struct seq_file *seq, void *v) |
1da177e4c
|
964 |
{ |
42a73808e
|
965 966 967 |
struct raw_iter_state *state = raw_seq_private(seq); read_unlock(&state->h->lock); |
1da177e4c
|
968 |
} |
42a73808e
|
969 |
EXPORT_SYMBOL_GPL(raw_seq_stop); |
1da177e4c
|
970 |
|
8cd850efa
|
971 |
static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) |
1da177e4c
|
972 973 |
{ struct inet_sock *inet = inet_sk(sp); |
c720c7e83
|
974 975 |
__be32 dest = inet->inet_daddr, src = inet->inet_rcv_saddr; |
1da177e4c
|
976 |
__u16 destp = 0, |
c720c7e83
|
977 |
srcp = inet->inet_num; |
1da177e4c
|
978 |
|
8cd850efa
|
979 |
seq_printf(seq, "%4d: %08X:%04X %08X:%04X" |
d14c5ab6b
|
980 981 |
" %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d ", |
e905a9eda
|
982 |
i, src, srcp, dest, destp, sp->sk_state, |
31e6d363a
|
983 984 |
sk_wmem_alloc_get(sp), sk_rmem_alloc_get(sp), |
a7cb5a49b
|
985 986 987 |
0, 0L, 0, from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), 0, sock_i_ino(sp), |
33c732c36
|
988 |
atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); |
1da177e4c
|
989 990 991 992 |
} static int raw_seq_show(struct seq_file *seq, void *v) { |
1da177e4c
|
993 |
if (v == SEQ_START_TOKEN) |
8cd850efa
|
994 995 |
seq_printf(seq, " sl local_address rem_address st tx_queue " "rx_queue tr tm->when retrnsmt uid timeout " |
cb61cb9b8
|
996 997 |
"inode ref pointer drops "); |
8cd850efa
|
998 999 |
else raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); |
1da177e4c
|
1000 1001 |
return 0; } |
f690808e1
|
1002 |
static const struct seq_operations raw_seq_ops = { |
1da177e4c
|
1003 1004 1005 1006 1007 |
.start = raw_seq_start, .next = raw_seq_next, .stop = raw_seq_stop, .show = raw_seq_show, }; |
3046d7674
|
1008 1009 |
int raw_seq_open(struct inode *ino, struct file *file, struct raw_hashinfo *h, const struct seq_operations *ops) |
1da177e4c
|
1010 |
{ |
f51d599fb
|
1011 |
int err; |
42a73808e
|
1012 |
struct raw_iter_state *i; |
3046d7674
|
1013 |
err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state)); |
f51d599fb
|
1014 1015 |
if (err < 0) return err; |
42a73808e
|
1016 |
|
f51d599fb
|
1017 |
i = raw_seq_private((struct seq_file *)file->private_data); |
42a73808e
|
1018 |
i->h = h; |
42a73808e
|
1019 1020 1021 1022 1023 1024 |
return 0; } EXPORT_SYMBOL_GPL(raw_seq_open); static int raw_v4_seq_open(struct inode *inode, struct file *file) { |
3046d7674
|
1025 |
return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops); |
1da177e4c
|
1026 |
} |
9a32144e9
|
1027 |
static const struct file_operations raw_seq_fops = { |
1da177e4c
|
1028 |
.owner = THIS_MODULE, |
42a73808e
|
1029 |
.open = raw_v4_seq_open, |
1da177e4c
|
1030 1031 |
.read = seq_read, .llseek = seq_lseek, |
f51d599fb
|
1032 |
.release = seq_release_net, |
1da177e4c
|
1033 |
}; |
a308da162
|
1034 |
static __net_init int raw_init_net(struct net *net) |
1da177e4c
|
1035 |
{ |
d4beaa66a
|
1036 |
if (!proc_create("raw", S_IRUGO, net->proc_net, &raw_seq_fops)) |
1da177e4c
|
1037 |
return -ENOMEM; |
a308da162
|
1038 |
|
1da177e4c
|
1039 1040 |
return 0; } |
a308da162
|
1041 1042 |
static __net_exit void raw_exit_net(struct net *net) { |
ece31ffd5
|
1043 |
remove_proc_entry("raw", net->proc_net); |
a308da162
|
1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 |
} 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); } |
1da177e4c
|
1055 1056 |
void __init raw_proc_exit(void) { |
a308da162
|
1057 |
unregister_pernet_subsys(&raw_net_ops); |
1da177e4c
|
1058 1059 |
} #endif /* CONFIG_PROC_FS */ |