| 1 |
1275 |
phoenix |
/*
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| 2 |
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* INET An implementation of the TCP/IP protocol suite for the LINUX
|
| 3 |
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* operating system. INET is implemented using the BSD Socket
|
| 4 |
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* interface as the means of communication with the user level.
|
| 5 |
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*
|
| 6 |
|
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* RAW - implementation of IP "raw" sockets.
|
| 7 |
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*
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| 8 |
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* Version: $Id: raw.c,v 1.1.1.1 2004-04-15 01:13:31 phoenix Exp $
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| 9 |
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*
|
| 10 |
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* Authors: Ross Biro, <bir7@leland.Stanford.Edu>
|
| 11 |
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
|
| 12 |
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*
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| 13 |
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* Fixes:
|
| 14 |
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* Alan Cox : verify_area() fixed up
|
| 15 |
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* Alan Cox : ICMP error handling
|
| 16 |
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* Alan Cox : EMSGSIZE if you send too big a packet
|
| 17 |
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* Alan Cox : Now uses generic datagrams and shared
|
| 18 |
|
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* skbuff library. No more peek crashes,
|
| 19 |
|
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* no more backlogs
|
| 20 |
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* Alan Cox : Checks sk->broadcast.
|
| 21 |
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* Alan Cox : Uses skb_free_datagram/skb_copy_datagram
|
| 22 |
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* Alan Cox : Raw passes ip options too
|
| 23 |
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* Alan Cox : Setsocketopt added
|
| 24 |
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* Alan Cox : Fixed error return for broadcasts
|
| 25 |
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* Alan Cox : Removed wake_up calls
|
| 26 |
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* Alan Cox : Use ttl/tos
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| 27 |
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* Alan Cox : Cleaned up old debugging
|
| 28 |
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* Alan Cox : Use new kernel side addresses
|
| 29 |
|
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* Arnt Gulbrandsen : Fixed MSG_DONTROUTE in raw sockets.
|
| 30 |
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* Alan Cox : BSD style RAW socket demultiplexing.
|
| 31 |
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* Alan Cox : Beginnings of mrouted support.
|
| 32 |
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* Alan Cox : Added IP_HDRINCL option.
|
| 33 |
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* Alan Cox : Skip broadcast check if BSDism set.
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| 34 |
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* David S. Miller : New socket lookup architecture.
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| 35 |
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*
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| 36 |
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* This program is free software; you can redistribute it and/or
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| 37 |
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* modify it under the terms of the GNU General Public License
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| 38 |
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* as published by the Free Software Foundation; either version
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| 39 |
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* 2 of the License, or (at your option) any later version.
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| 40 |
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*/
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| 41 |
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| 42 |
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#include <linux/config.h>
|
| 43 |
|
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#include <asm/system.h>
|
| 44 |
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#include <asm/uaccess.h>
|
| 45 |
|
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#include <asm/ioctls.h>
|
| 46 |
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#include <linux/types.h>
|
| 47 |
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#include <linux/sched.h>
|
| 48 |
|
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#include <linux/errno.h>
|
| 49 |
|
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#include <linux/timer.h>
|
| 50 |
|
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#include <linux/mm.h>
|
| 51 |
|
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#include <linux/kernel.h>
|
| 52 |
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#include <linux/fcntl.h>
|
| 53 |
|
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#include <linux/socket.h>
|
| 54 |
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#include <linux/in.h>
|
| 55 |
|
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#include <linux/inet.h>
|
| 56 |
|
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#include <linux/netdevice.h>
|
| 57 |
|
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#include <linux/mroute.h>
|
| 58 |
|
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#include <net/ip.h>
|
| 59 |
|
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#include <net/protocol.h>
|
| 60 |
|
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#include <linux/skbuff.h>
|
| 61 |
|
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#include <net/sock.h>
|
| 62 |
|
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#include <net/icmp.h>
|
| 63 |
|
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#include <net/udp.h>
|
| 64 |
|
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#include <net/raw.h>
|
| 65 |
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#include <net/inet_common.h>
|
| 66 |
|
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#include <net/checksum.h>
|
| 67 |
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|
| 68 |
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struct sock *raw_v4_htable[RAWV4_HTABLE_SIZE];
|
| 69 |
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rwlock_t raw_v4_lock = RW_LOCK_UNLOCKED;
|
| 70 |
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|
| 71 |
|
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static void raw_v4_hash(struct sock *sk)
|
| 72 |
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{
|
| 73 |
|
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struct sock **skp = &raw_v4_htable[sk->num & (RAWV4_HTABLE_SIZE - 1)];
|
| 74 |
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|
| 75 |
|
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write_lock_bh(&raw_v4_lock);
|
| 76 |
|
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if ((sk->next = *skp) != NULL)
|
| 77 |
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(*skp)->pprev = &sk->next;
|
| 78 |
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*skp = sk;
|
| 79 |
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sk->pprev = skp;
|
| 80 |
|
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sock_prot_inc_use(sk->prot);
|
| 81 |
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sock_hold(sk);
|
| 82 |
|
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write_unlock_bh(&raw_v4_lock);
|
| 83 |
|
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}
|
| 84 |
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|
| 85 |
|
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static void raw_v4_unhash(struct sock *sk)
|
| 86 |
|
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{
|
| 87 |
|
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write_lock_bh(&raw_v4_lock);
|
| 88 |
|
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if (sk->pprev) {
|
| 89 |
|
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if (sk->next)
|
| 90 |
|
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sk->next->pprev = sk->pprev;
|
| 91 |
|
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*sk->pprev = sk->next;
|
| 92 |
|
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sk->pprev = NULL;
|
| 93 |
|
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sock_prot_dec_use(sk->prot);
|
| 94 |
|
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__sock_put(sk);
|
| 95 |
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}
|
| 96 |
|
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write_unlock_bh(&raw_v4_lock);
|
| 97 |
|
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}
|
| 98 |
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|
| 99 |
|
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struct sock *__raw_v4_lookup(struct sock *sk, unsigned short num,
|
| 100 |
|
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unsigned long raddr, unsigned long laddr,
|
| 101 |
|
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int dif)
|
| 102 |
|
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{
|
| 103 |
|
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struct sock *s = sk;
|
| 104 |
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|
| 105 |
|
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for (s = sk; s; s = s->next) {
|
| 106 |
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if (s->num == num &&
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| 107 |
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!(s->daddr && s->daddr != raddr) &&
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| 108 |
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!(s->rcv_saddr && s->rcv_saddr != laddr) &&
|
| 109 |
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!(s->bound_dev_if && s->bound_dev_if != dif))
|
| 110 |
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break; /* gotcha */
|
| 111 |
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}
|
| 112 |
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return s;
|
| 113 |
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}
|
| 114 |
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|
| 115 |
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/*
|
| 116 |
|
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* 0 - deliver
|
| 117 |
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* 1 - block
|
| 118 |
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*/
|
| 119 |
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static __inline__ int icmp_filter(struct sock *sk, struct sk_buff *skb)
|
| 120 |
|
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{
|
| 121 |
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int type;
|
| 122 |
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|
| 123 |
|
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type = skb->h.icmph->type;
|
| 124 |
|
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if (type < 32) {
|
| 125 |
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__u32 data = sk->tp_pinfo.tp_raw4.filter.data;
|
| 126 |
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|
| 127 |
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return ((1 << type) & data) != 0;
|
| 128 |
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}
|
| 129 |
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|
| 130 |
|
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/* Do not block unknown ICMP types */
|
| 131 |
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return 0;
|
| 132 |
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}
|
| 133 |
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|
|
| 134 |
|
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/* IP input processing comes here for RAW socket delivery.
|
| 135 |
|
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* This is fun as to avoid copies we want to make no surplus
|
| 136 |
|
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* copies.
|
| 137 |
|
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*
|
| 138 |
|
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* RFC 1122: SHOULD pass TOS value up to the transport layer.
|
| 139 |
|
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* -> It does. And not only TOS, but all IP header.
|
| 140 |
|
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*/
|
| 141 |
|
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struct sock *raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
|
| 142 |
|
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{
|
| 143 |
|
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struct sock *sk;
|
| 144 |
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|
| 145 |
|
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read_lock(&raw_v4_lock);
|
| 146 |
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if ((sk = raw_v4_htable[hash]) == NULL)
|
| 147 |
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goto out;
|
| 148 |
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sk = __raw_v4_lookup(sk, iph->protocol,
|
| 149 |
|
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iph->saddr, iph->daddr,
|
| 150 |
|
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skb->dev->ifindex);
|
| 151 |
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| 152 |
|
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while (sk) {
|
| 153 |
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struct sock *sknext = __raw_v4_lookup(sk->next, iph->protocol,
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| 154 |
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iph->saddr, iph->daddr,
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| 155 |
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skb->dev->ifindex);
|
| 156 |
|
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if (iph->protocol != IPPROTO_ICMP ||
|
| 157 |
|
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!icmp_filter(sk, skb)) {
|
| 158 |
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struct sk_buff *clone;
|
| 159 |
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|
|
| 160 |
|
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if (!sknext)
|
| 161 |
|
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break;
|
| 162 |
|
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clone = skb_clone(skb, GFP_ATOMIC);
|
| 163 |
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/* Not releasing hash table! */
|
| 164 |
|
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if (clone)
|
| 165 |
|
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raw_rcv(sk, clone);
|
| 166 |
|
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}
|
| 167 |
|
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sk = sknext;
|
| 168 |
|
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}
|
| 169 |
|
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out:
|
| 170 |
|
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if (sk)
|
| 171 |
|
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sock_hold(sk);
|
| 172 |
|
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read_unlock(&raw_v4_lock);
|
| 173 |
|
|
|
| 174 |
|
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return sk;
|
| 175 |
|
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}
|
| 176 |
|
|
|
| 177 |
|
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void raw_err (struct sock *sk, struct sk_buff *skb, u32 info)
|
| 178 |
|
|
{
|
| 179 |
|
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int type = skb->h.icmph->type;
|
| 180 |
|
|
int code = skb->h.icmph->code;
|
| 181 |
|
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int err = 0;
|
| 182 |
|
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int harderr = 0;
|
| 183 |
|
|
|
| 184 |
|
|
/* Report error on raw socket, if:
|
| 185 |
|
|
1. User requested ip_recverr.
|
| 186 |
|
|
2. Socket is connected (otherwise the error indication
|
| 187 |
|
|
is useless without ip_recverr and error is hard.
|
| 188 |
|
|
*/
|
| 189 |
|
|
if (!sk->protinfo.af_inet.recverr && sk->state != TCP_ESTABLISHED)
|
| 190 |
|
|
return;
|
| 191 |
|
|
|
| 192 |
|
|
switch (type) {
|
| 193 |
|
|
default:
|
| 194 |
|
|
case ICMP_TIME_EXCEEDED:
|
| 195 |
|
|
err = EHOSTUNREACH;
|
| 196 |
|
|
break;
|
| 197 |
|
|
case ICMP_SOURCE_QUENCH:
|
| 198 |
|
|
return;
|
| 199 |
|
|
case ICMP_PARAMETERPROB:
|
| 200 |
|
|
err = EPROTO;
|
| 201 |
|
|
harderr = 1;
|
| 202 |
|
|
break;
|
| 203 |
|
|
case ICMP_DEST_UNREACH:
|
| 204 |
|
|
err = EHOSTUNREACH;
|
| 205 |
|
|
if (code > NR_ICMP_UNREACH)
|
| 206 |
|
|
break;
|
| 207 |
|
|
err = icmp_err_convert[code].errno;
|
| 208 |
|
|
harderr = icmp_err_convert[code].fatal;
|
| 209 |
|
|
if (code == ICMP_FRAG_NEEDED) {
|
| 210 |
|
|
harderr = sk->protinfo.af_inet.pmtudisc !=
|
| 211 |
|
|
IP_PMTUDISC_DONT;
|
| 212 |
|
|
err = EMSGSIZE;
|
| 213 |
|
|
}
|
| 214 |
|
|
}
|
| 215 |
|
|
|
| 216 |
|
|
if (sk->protinfo.af_inet.recverr) {
|
| 217 |
|
|
struct iphdr *iph = (struct iphdr*)skb->data;
|
| 218 |
|
|
u8 *payload = skb->data + (iph->ihl << 2);
|
| 219 |
|
|
|
| 220 |
|
|
if (sk->protinfo.af_inet.hdrincl)
|
| 221 |
|
|
payload = skb->data;
|
| 222 |
|
|
ip_icmp_error(sk, skb, err, 0, info, payload);
|
| 223 |
|
|
}
|
| 224 |
|
|
|
| 225 |
|
|
if (sk->protinfo.af_inet.recverr || harderr) {
|
| 226 |
|
|
sk->err = err;
|
| 227 |
|
|
sk->error_report(sk);
|
| 228 |
|
|
}
|
| 229 |
|
|
}
|
| 230 |
|
|
|
| 231 |
|
|
static int raw_rcv_skb(struct sock * sk, struct sk_buff * skb)
|
| 232 |
|
|
{
|
| 233 |
|
|
/* Charge it to the socket. */
|
| 234 |
|
|
|
| 235 |
|
|
if (sock_queue_rcv_skb(sk, skb) < 0) {
|
| 236 |
|
|
IP_INC_STATS(IpInDiscards);
|
| 237 |
|
|
kfree_skb(skb);
|
| 238 |
|
|
return NET_RX_DROP;
|
| 239 |
|
|
}
|
| 240 |
|
|
|
| 241 |
|
|
IP_INC_STATS(IpInDelivers);
|
| 242 |
|
|
return NET_RX_SUCCESS;
|
| 243 |
|
|
}
|
| 244 |
|
|
|
| 245 |
|
|
int raw_rcv(struct sock *sk, struct sk_buff *skb)
|
| 246 |
|
|
{
|
| 247 |
|
|
skb_push(skb, skb->data - skb->nh.raw);
|
| 248 |
|
|
|
| 249 |
|
|
raw_rcv_skb(sk, skb);
|
| 250 |
|
|
return 0;
|
| 251 |
|
|
}
|
| 252 |
|
|
|
| 253 |
|
|
struct rawfakehdr
|
| 254 |
|
|
{
|
| 255 |
|
|
struct iovec *iov;
|
| 256 |
|
|
u32 saddr;
|
| 257 |
|
|
struct dst_entry *dst;
|
| 258 |
|
|
};
|
| 259 |
|
|
|
| 260 |
|
|
/*
|
| 261 |
|
|
* Send a RAW IP packet.
|
| 262 |
|
|
*/
|
| 263 |
|
|
|
| 264 |
|
|
/*
|
| 265 |
|
|
* Callback support is trivial for SOCK_RAW
|
| 266 |
|
|
*/
|
| 267 |
|
|
|
| 268 |
|
|
static int raw_getfrag(const void *p, char *to, unsigned int offset,
|
| 269 |
|
|
unsigned int fraglen)
|
| 270 |
|
|
{
|
| 271 |
|
|
struct rawfakehdr *rfh = (struct rawfakehdr *) p;
|
| 272 |
|
|
return memcpy_fromiovecend(to, rfh->iov, offset, fraglen);
|
| 273 |
|
|
}
|
| 274 |
|
|
|
| 275 |
|
|
/*
|
| 276 |
|
|
* IPPROTO_RAW needs extra work.
|
| 277 |
|
|
*/
|
| 278 |
|
|
|
| 279 |
|
|
static int raw_getrawfrag(const void *p, char *to, unsigned int offset,
|
| 280 |
|
|
unsigned int fraglen)
|
| 281 |
|
|
{
|
| 282 |
|
|
struct rawfakehdr *rfh = (struct rawfakehdr *) p;
|
| 283 |
|
|
|
| 284 |
|
|
if (memcpy_fromiovecend(to, rfh->iov, offset, fraglen))
|
| 285 |
|
|
return -EFAULT;
|
| 286 |
|
|
|
| 287 |
|
|
if (!offset) {
|
| 288 |
|
|
struct iphdr *iph = (struct iphdr *)to;
|
| 289 |
|
|
if (!iph->saddr)
|
| 290 |
|
|
iph->saddr = rfh->saddr;
|
| 291 |
|
|
iph->check = 0;
|
| 292 |
|
|
iph->tot_len = htons(fraglen); /* This is right as you can't
|
| 293 |
|
|
frag RAW packets */
|
| 294 |
|
|
/*
|
| 295 |
|
|
* Deliberate breach of modularity to keep
|
| 296 |
|
|
* ip_build_xmit clean (well less messy).
|
| 297 |
|
|
*/
|
| 298 |
|
|
if (!iph->id)
|
| 299 |
|
|
ip_select_ident(iph, rfh->dst, NULL);
|
| 300 |
|
|
iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
|
| 301 |
|
|
}
|
| 302 |
|
|
return 0;
|
| 303 |
|
|
}
|
| 304 |
|
|
|
| 305 |
|
|
static int raw_sendmsg(struct sock *sk, struct msghdr *msg, int len)
|
| 306 |
|
|
{
|
| 307 |
|
|
struct ipcm_cookie ipc;
|
| 308 |
|
|
struct rawfakehdr rfh;
|
| 309 |
|
|
struct rtable *rt = NULL;
|
| 310 |
|
|
int free = 0;
|
| 311 |
|
|
u32 daddr;
|
| 312 |
|
|
u8 tos;
|
| 313 |
|
|
int err;
|
| 314 |
|
|
|
| 315 |
|
|
/* This check is ONLY to check for arithmetic overflow
|
| 316 |
|
|
on integer(!) len. Not more! Real check will be made
|
| 317 |
|
|
in ip_build_xmit --ANK
|
| 318 |
|
|
|
| 319 |
|
|
BTW socket.c -> af_*.c -> ... make multiple
|
| 320 |
|
|
invalid conversions size_t -> int. We MUST repair it f.e.
|
| 321 |
|
|
by replacing all of them with size_t and revise all
|
| 322 |
|
|
the places sort of len += sizeof(struct iphdr)
|
| 323 |
|
|
If len was ULONG_MAX-10 it would be cathastrophe --ANK
|
| 324 |
|
|
*/
|
| 325 |
|
|
|
| 326 |
|
|
err = -EMSGSIZE;
|
| 327 |
|
|
if (len < 0 || len > 0xFFFF)
|
| 328 |
|
|
goto out;
|
| 329 |
|
|
|
| 330 |
|
|
/*
|
| 331 |
|
|
* Check the flags.
|
| 332 |
|
|
*/
|
| 333 |
|
|
|
| 334 |
|
|
err = -EOPNOTSUPP;
|
| 335 |
|
|
if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */
|
| 336 |
|
|
goto out; /* compatibility */
|
| 337 |
|
|
|
| 338 |
|
|
/*
|
| 339 |
|
|
* Get and verify the address.
|
| 340 |
|
|
*/
|
| 341 |
|
|
|
| 342 |
|
|
if (msg->msg_namelen) {
|
| 343 |
|
|
struct sockaddr_in *usin = (struct sockaddr_in*)msg->msg_name;
|
| 344 |
|
|
err = -EINVAL;
|
| 345 |
|
|
if (msg->msg_namelen < sizeof(*usin))
|
| 346 |
|
|
goto out;
|
| 347 |
|
|
if (usin->sin_family != AF_INET) {
|
| 348 |
|
|
static int complained;
|
| 349 |
|
|
if (!complained++)
|
| 350 |
|
|
printk(KERN_INFO "%s forgot to set AF_INET in "
|
| 351 |
|
|
"raw sendmsg. Fix it!\n",
|
| 352 |
|
|
current->comm);
|
| 353 |
|
|
err = -EINVAL;
|
| 354 |
|
|
if (usin->sin_family)
|
| 355 |
|
|
goto out;
|
| 356 |
|
|
}
|
| 357 |
|
|
daddr = usin->sin_addr.s_addr;
|
| 358 |
|
|
/* ANK: I did not forget to get protocol from port field.
|
| 359 |
|
|
* I just do not know, who uses this weirdness.
|
| 360 |
|
|
* IP_HDRINCL is much more convenient.
|
| 361 |
|
|
*/
|
| 362 |
|
|
} else {
|
| 363 |
|
|
err = -EDESTADDRREQ;
|
| 364 |
|
|
if (sk->state != TCP_ESTABLISHED)
|
| 365 |
|
|
goto out;
|
| 366 |
|
|
daddr = sk->daddr;
|
| 367 |
|
|
}
|
| 368 |
|
|
|
| 369 |
|
|
ipc.addr = sk->saddr;
|
| 370 |
|
|
ipc.opt = NULL;
|
| 371 |
|
|
ipc.oif = sk->bound_dev_if;
|
| 372 |
|
|
|
| 373 |
|
|
if (msg->msg_controllen) {
|
| 374 |
|
|
err = ip_cmsg_send(msg, &ipc);
|
| 375 |
|
|
if (err)
|
| 376 |
|
|
goto out;
|
| 377 |
|
|
if (ipc.opt)
|
| 378 |
|
|
free = 1;
|
| 379 |
|
|
}
|
| 380 |
|
|
|
| 381 |
|
|
rfh.saddr = ipc.addr;
|
| 382 |
|
|
ipc.addr = daddr;
|
| 383 |
|
|
|
| 384 |
|
|
if (!ipc.opt)
|
| 385 |
|
|
ipc.opt = sk->protinfo.af_inet.opt;
|
| 386 |
|
|
|
| 387 |
|
|
if (ipc.opt) {
|
| 388 |
|
|
err = -EINVAL;
|
| 389 |
|
|
/* Linux does not mangle headers on raw sockets,
|
| 390 |
|
|
* so that IP options + IP_HDRINCL is non-sense.
|
| 391 |
|
|
*/
|
| 392 |
|
|
if (sk->protinfo.af_inet.hdrincl)
|
| 393 |
|
|
goto done;
|
| 394 |
|
|
if (ipc.opt->srr) {
|
| 395 |
|
|
if (!daddr)
|
| 396 |
|
|
goto done;
|
| 397 |
|
|
daddr = ipc.opt->faddr;
|
| 398 |
|
|
}
|
| 399 |
|
|
}
|
| 400 |
|
|
tos = RT_TOS(sk->protinfo.af_inet.tos) | sk->localroute;
|
| 401 |
|
|
if (msg->msg_flags & MSG_DONTROUTE)
|
| 402 |
|
|
tos |= RTO_ONLINK;
|
| 403 |
|
|
|
| 404 |
|
|
if (MULTICAST(daddr)) {
|
| 405 |
|
|
if (!ipc.oif)
|
| 406 |
|
|
ipc.oif = sk->protinfo.af_inet.mc_index;
|
| 407 |
|
|
if (!rfh.saddr)
|
| 408 |
|
|
rfh.saddr = sk->protinfo.af_inet.mc_addr;
|
| 409 |
|
|
}
|
| 410 |
|
|
|
| 411 |
|
|
err = ip_route_output(&rt, daddr, rfh.saddr, tos, ipc.oif);
|
| 412 |
|
|
|
| 413 |
|
|
if (err)
|
| 414 |
|
|
goto done;
|
| 415 |
|
|
|
| 416 |
|
|
err = -EACCES;
|
| 417 |
|
|
if (rt->rt_flags & RTCF_BROADCAST && !sk->broadcast)
|
| 418 |
|
|
goto done;
|
| 419 |
|
|
|
| 420 |
|
|
if (msg->msg_flags & MSG_CONFIRM)
|
| 421 |
|
|
goto do_confirm;
|
| 422 |
|
|
back_from_confirm:
|
| 423 |
|
|
|
| 424 |
|
|
rfh.iov = msg->msg_iov;
|
| 425 |
|
|
rfh.saddr = rt->rt_src;
|
| 426 |
|
|
rfh.dst = &rt->u.dst;
|
| 427 |
|
|
if (!ipc.addr)
|
| 428 |
|
|
ipc.addr = rt->rt_dst;
|
| 429 |
|
|
err = ip_build_xmit(sk, sk->protinfo.af_inet.hdrincl ? raw_getrawfrag :
|
| 430 |
|
|
raw_getfrag, &rfh, len, &ipc, rt, msg->msg_flags);
|
| 431 |
|
|
|
| 432 |
|
|
done:
|
| 433 |
|
|
if (free)
|
| 434 |
|
|
kfree(ipc.opt);
|
| 435 |
|
|
ip_rt_put(rt);
|
| 436 |
|
|
|
| 437 |
|
|
out: return err < 0 ? err : len;
|
| 438 |
|
|
|
| 439 |
|
|
do_confirm:
|
| 440 |
|
|
dst_confirm(&rt->u.dst);
|
| 441 |
|
|
if (!(msg->msg_flags & MSG_PROBE) || len)
|
| 442 |
|
|
goto back_from_confirm;
|
| 443 |
|
|
err = 0;
|
| 444 |
|
|
goto done;
|
| 445 |
|
|
}
|
| 446 |
|
|
|
| 447 |
|
|
static void raw_close(struct sock *sk, long timeout)
|
| 448 |
|
|
{
|
| 449 |
|
|
/*
|
| 450 |
|
|
* Raw sockets may have direct kernel refereneces. Kill them.
|
| 451 |
|
|
*/
|
| 452 |
|
|
ip_ra_control(sk, 0, NULL);
|
| 453 |
|
|
|
| 454 |
|
|
inet_sock_release(sk);
|
| 455 |
|
|
}
|
| 456 |
|
|
|
| 457 |
|
|
/* This gets rid of all the nasties in af_inet. -DaveM */
|
| 458 |
|
|
static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
|
| 459 |
|
|
{
|
| 460 |
|
|
struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
|
| 461 |
|
|
int ret = -EINVAL;
|
| 462 |
|
|
int chk_addr_ret;
|
| 463 |
|
|
|
| 464 |
|
|
if (sk->state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
|
| 465 |
|
|
goto out;
|
| 466 |
|
|
chk_addr_ret = inet_addr_type(addr->sin_addr.s_addr);
|
| 467 |
|
|
ret = -EADDRNOTAVAIL;
|
| 468 |
|
|
if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
|
| 469 |
|
|
chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
|
| 470 |
|
|
goto out;
|
| 471 |
|
|
sk->rcv_saddr = sk->saddr = addr->sin_addr.s_addr;
|
| 472 |
|
|
if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
|
| 473 |
|
|
sk->saddr = 0; /* Use device */
|
| 474 |
|
|
sk_dst_reset(sk);
|
| 475 |
|
|
ret = 0;
|
| 476 |
|
|
out: return ret;
|
| 477 |
|
|
}
|
| 478 |
|
|
|
| 479 |
|
|
/*
|
| 480 |
|
|
* This should be easy, if there is something there
|
| 481 |
|
|
* we return it, otherwise we block.
|
| 482 |
|
|
*/
|
| 483 |
|
|
|
| 484 |
|
|
int raw_recvmsg(struct sock *sk, struct msghdr *msg, int len,
|
| 485 |
|
|
int noblock, int flags, int *addr_len)
|
| 486 |
|
|
{
|
| 487 |
|
|
int copied = 0;
|
| 488 |
|
|
int err = -EOPNOTSUPP;
|
| 489 |
|
|
struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
|
| 490 |
|
|
struct sk_buff *skb;
|
| 491 |
|
|
|
| 492 |
|
|
if (flags & MSG_OOB)
|
| 493 |
|
|
goto out;
|
| 494 |
|
|
|
| 495 |
|
|
if (addr_len)
|
| 496 |
|
|
*addr_len = sizeof(*sin);
|
| 497 |
|
|
|
| 498 |
|
|
if (flags & MSG_ERRQUEUE) {
|
| 499 |
|
|
err = ip_recv_error(sk, msg, len);
|
| 500 |
|
|
goto out;
|
| 501 |
|
|
}
|
| 502 |
|
|
|
| 503 |
|
|
skb = skb_recv_datagram(sk, flags, noblock, &err);
|
| 504 |
|
|
if (!skb)
|
| 505 |
|
|
goto out;
|
| 506 |
|
|
|
| 507 |
|
|
copied = skb->len;
|
| 508 |
|
|
if (len < copied) {
|
| 509 |
|
|
msg->msg_flags |= MSG_TRUNC;
|
| 510 |
|
|
copied = len;
|
| 511 |
|
|
}
|
| 512 |
|
|
|
| 513 |
|
|
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
|
| 514 |
|
|
if (err)
|
| 515 |
|
|
goto done;
|
| 516 |
|
|
|
| 517 |
|
|
sock_recv_timestamp(msg, sk, skb);
|
| 518 |
|
|
|
| 519 |
|
|
/* Copy the address. */
|
| 520 |
|
|
if (sin) {
|
| 521 |
|
|
sin->sin_family = AF_INET;
|
| 522 |
|
|
sin->sin_addr.s_addr = skb->nh.iph->saddr;
|
| 523 |
|
|
memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
|
| 524 |
|
|
}
|
| 525 |
|
|
if (sk->protinfo.af_inet.cmsg_flags)
|
| 526 |
|
|
ip_cmsg_recv(msg, skb);
|
| 527 |
|
|
done:
|
| 528 |
|
|
skb_free_datagram(sk, skb);
|
| 529 |
|
|
out: return err ? : copied;
|
| 530 |
|
|
}
|
| 531 |
|
|
|
| 532 |
|
|
static int raw_init(struct sock *sk)
|
| 533 |
|
|
{
|
| 534 |
|
|
struct raw_opt *tp = &(sk->tp_pinfo.tp_raw4);
|
| 535 |
|
|
if (sk->num == IPPROTO_ICMP)
|
| 536 |
|
|
memset(&tp->filter, 0, sizeof(tp->filter));
|
| 537 |
|
|
return 0;
|
| 538 |
|
|
}
|
| 539 |
|
|
|
| 540 |
|
|
static int raw_seticmpfilter(struct sock *sk, char *optval, int optlen)
|
| 541 |
|
|
{
|
| 542 |
|
|
if (optlen > sizeof(struct icmp_filter))
|
| 543 |
|
|
optlen = sizeof(struct icmp_filter);
|
| 544 |
|
|
if (copy_from_user(&sk->tp_pinfo.tp_raw4.filter, optval, optlen))
|
| 545 |
|
|
return -EFAULT;
|
| 546 |
|
|
return 0;
|
| 547 |
|
|
}
|
| 548 |
|
|
|
| 549 |
|
|
static int raw_geticmpfilter(struct sock *sk, char *optval, int *optlen)
|
| 550 |
|
|
{
|
| 551 |
|
|
int len, ret = -EFAULT;
|
| 552 |
|
|
|
| 553 |
|
|
if (get_user(len, optlen))
|
| 554 |
|
|
goto out;
|
| 555 |
|
|
ret = -EINVAL;
|
| 556 |
|
|
if (len < 0)
|
| 557 |
|
|
goto out;
|
| 558 |
|
|
if (len > sizeof(struct icmp_filter))
|
| 559 |
|
|
len = sizeof(struct icmp_filter);
|
| 560 |
|
|
ret = -EFAULT;
|
| 561 |
|
|
if (put_user(len, optlen) ||
|
| 562 |
|
|
copy_to_user(optval, &sk->tp_pinfo.tp_raw4.filter, len))
|
| 563 |
|
|
goto out;
|
| 564 |
|
|
ret = 0;
|
| 565 |
|
|
out: return ret;
|
| 566 |
|
|
}
|
| 567 |
|
|
|
| 568 |
|
|
static int raw_setsockopt(struct sock *sk, int level, int optname,
|
| 569 |
|
|
char *optval, int optlen)
|
| 570 |
|
|
{
|
| 571 |
|
|
if (level != SOL_RAW)
|
| 572 |
|
|
return ip_setsockopt(sk, level, optname, optval, optlen);
|
| 573 |
|
|
|
| 574 |
|
|
if (optname == ICMP_FILTER) {
|
| 575 |
|
|
if (sk->num != IPPROTO_ICMP)
|
| 576 |
|
|
return -EOPNOTSUPP;
|
| 577 |
|
|
else
|
| 578 |
|
|
return raw_seticmpfilter(sk, optval, optlen);
|
| 579 |
|
|
}
|
| 580 |
|
|
return -ENOPROTOOPT;
|
| 581 |
|
|
}
|
| 582 |
|
|
|
| 583 |
|
|
static int raw_getsockopt(struct sock *sk, int level, int optname,
|
| 584 |
|
|
char *optval, int *optlen)
|
| 585 |
|
|
{
|
| 586 |
|
|
if (level != SOL_RAW)
|
| 587 |
|
|
return ip_getsockopt(sk, level, optname, optval, optlen);
|
| 588 |
|
|
|
| 589 |
|
|
if (optname == ICMP_FILTER) {
|
| 590 |
|
|
if (sk->num != IPPROTO_ICMP)
|
| 591 |
|
|
return -EOPNOTSUPP;
|
| 592 |
|
|
else
|
| 593 |
|
|
return raw_geticmpfilter(sk, optval, optlen);
|
| 594 |
|
|
}
|
| 595 |
|
|
return -ENOPROTOOPT;
|
| 596 |
|
|
}
|
| 597 |
|
|
|
| 598 |
|
|
static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
|
| 599 |
|
|
{
|
| 600 |
|
|
switch (cmd) {
|
| 601 |
|
|
case SIOCOUTQ: {
|
| 602 |
|
|
int amount = atomic_read(&sk->wmem_alloc);
|
| 603 |
|
|
return put_user(amount, (int *)arg);
|
| 604 |
|
|
}
|
| 605 |
|
|
case SIOCINQ: {
|
| 606 |
|
|
struct sk_buff *skb;
|
| 607 |
|
|
int amount = 0;
|
| 608 |
|
|
|
| 609 |
|
|
spin_lock_irq(&sk->receive_queue.lock);
|
| 610 |
|
|
skb = skb_peek(&sk->receive_queue);
|
| 611 |
|
|
if (skb != NULL)
|
| 612 |
|
|
amount = skb->len;
|
| 613 |
|
|
spin_unlock_irq(&sk->receive_queue.lock);
|
| 614 |
|
|
return put_user(amount, (int *)arg);
|
| 615 |
|
|
}
|
| 616 |
|
|
|
| 617 |
|
|
default:
|
| 618 |
|
|
#ifdef CONFIG_IP_MROUTE
|
| 619 |
|
|
return ipmr_ioctl(sk, cmd, arg);
|
| 620 |
|
|
#else
|
| 621 |
|
|
return -ENOIOCTLCMD;
|
| 622 |
|
|
#endif
|
| 623 |
|
|
}
|
| 624 |
|
|
}
|
| 625 |
|
|
|
| 626 |
|
|
static void get_raw_sock(struct sock *sp, char *tmpbuf, int i)
|
| 627 |
|
|
{
|
| 628 |
|
|
unsigned int dest = sp->daddr,
|
| 629 |
|
|
src = sp->rcv_saddr;
|
| 630 |
|
|
__u16 destp = 0,
|
| 631 |
|
|
srcp = sp->num;
|
| 632 |
|
|
|
| 633 |
|
|
sprintf(tmpbuf, "%4d: %08X:%04X %08X:%04X"
|
| 634 |
|
|
" %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p",
|
| 635 |
|
|
i, src, srcp, dest, destp, sp->state,
|
| 636 |
|
|
atomic_read(&sp->wmem_alloc), atomic_read(&sp->rmem_alloc),
|
| 637 |
|
|
0, 0L, 0,
|
| 638 |
|
|
sock_i_uid(sp), 0,
|
| 639 |
|
|
sock_i_ino(sp),
|
| 640 |
|
|
atomic_read(&sp->refcnt), sp);
|
| 641 |
|
|
}
|
| 642 |
|
|
|
| 643 |
|
|
int raw_get_info(char *buffer, char **start, off_t offset, int length)
|
| 644 |
|
|
{
|
| 645 |
|
|
int len = 0, num = 0, i;
|
| 646 |
|
|
off_t pos = 128;
|
| 647 |
|
|
off_t begin;
|
| 648 |
|
|
char tmpbuf[129];
|
| 649 |
|
|
|
| 650 |
|
|
if (offset < 128)
|
| 651 |
|
|
len += sprintf(buffer, "%-127s\n",
|
| 652 |
|
|
" sl local_address rem_address st tx_queue "
|
| 653 |
|
|
"rx_queue tr tm->when retrnsmt uid timeout "
|
| 654 |
|
|
"inode");
|
| 655 |
|
|
read_lock(&raw_v4_lock);
|
| 656 |
|
|
for (i = 0; i < RAWV4_HTABLE_SIZE; i++) {
|
| 657 |
|
|
struct sock *sk;
|
| 658 |
|
|
|
| 659 |
|
|
for (sk = raw_v4_htable[i]; sk; sk = sk->next, num++) {
|
| 660 |
|
|
if (sk->family != PF_INET)
|
| 661 |
|
|
continue;
|
| 662 |
|
|
pos += 128;
|
| 663 |
|
|
if (pos <= offset)
|
| 664 |
|
|
continue;
|
| 665 |
|
|
get_raw_sock(sk, tmpbuf, i);
|
| 666 |
|
|
len += sprintf(buffer + len, "%-127s\n", tmpbuf);
|
| 667 |
|
|
if (len >= length)
|
| 668 |
|
|
goto out;
|
| 669 |
|
|
}
|
| 670 |
|
|
}
|
| 671 |
|
|
out:
|
| 672 |
|
|
read_unlock(&raw_v4_lock);
|
| 673 |
|
|
begin = len - (pos - offset);
|
| 674 |
|
|
*start = buffer + begin;
|
| 675 |
|
|
len -= begin;
|
| 676 |
|
|
if (len > length)
|
| 677 |
|
|
len = length;
|
| 678 |
|
|
if (len < 0)
|
| 679 |
|
|
len = 0;
|
| 680 |
|
|
return len;
|
| 681 |
|
|
}
|
| 682 |
|
|
|
| 683 |
|
|
struct proto raw_prot = {
|
| 684 |
|
|
name: "RAW",
|
| 685 |
|
|
close: raw_close,
|
| 686 |
|
|
connect: udp_connect,
|
| 687 |
|
|
disconnect: udp_disconnect,
|
| 688 |
|
|
ioctl: raw_ioctl,
|
| 689 |
|
|
init: raw_init,
|
| 690 |
|
|
setsockopt: raw_setsockopt,
|
| 691 |
|
|
getsockopt: raw_getsockopt,
|
| 692 |
|
|
sendmsg: raw_sendmsg,
|
| 693 |
|
|
recvmsg: raw_recvmsg,
|
| 694 |
|
|
bind: raw_bind,
|
| 695 |
|
|
backlog_rcv: raw_rcv_skb,
|
| 696 |
|
|
hash: raw_v4_hash,
|
| 697 |
|
|
unhash: raw_v4_unhash,
|
| 698 |
|
|
};
|
