| 1 |
3 |
xianfeng |
/*
|
| 2 |
|
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* UDP over IPv6
|
| 3 |
|
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* Linux INET6 implementation
|
| 4 |
|
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*
|
| 5 |
|
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* Authors:
|
| 6 |
|
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* Pedro Roque <roque@di.fc.ul.pt>
|
| 7 |
|
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*
|
| 8 |
|
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* Based on linux/ipv4/udp.c
|
| 9 |
|
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*
|
| 10 |
|
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* $Id: udp.c,v 1.65 2002/02/01 22:01:04 davem Exp $
|
| 11 |
|
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*
|
| 12 |
|
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* Fixes:
|
| 13 |
|
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* Hideaki YOSHIFUJI : sin6_scope_id support
|
| 14 |
|
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* YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which
|
| 15 |
|
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* Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind
|
| 16 |
|
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* a single port at the same time.
|
| 17 |
|
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* Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
|
| 18 |
|
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* YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file.
|
| 19 |
|
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*
|
| 20 |
|
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* This program is free software; you can redistribute it and/or
|
| 21 |
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* modify it under the terms of the GNU General Public License
|
| 22 |
|
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* as published by the Free Software Foundation; either version
|
| 23 |
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* 2 of the License, or (at your option) any later version.
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| 24 |
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*/
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| 25 |
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| 26 |
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#include <linux/errno.h>
|
| 27 |
|
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#include <linux/types.h>
|
| 28 |
|
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#include <linux/socket.h>
|
| 29 |
|
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#include <linux/sockios.h>
|
| 30 |
|
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#include <linux/net.h>
|
| 31 |
|
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#include <linux/in6.h>
|
| 32 |
|
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#include <linux/netdevice.h>
|
| 33 |
|
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#include <linux/if_arp.h>
|
| 34 |
|
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#include <linux/ipv6.h>
|
| 35 |
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#include <linux/icmpv6.h>
|
| 36 |
|
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#include <linux/init.h>
|
| 37 |
|
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#include <linux/skbuff.h>
|
| 38 |
|
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#include <asm/uaccess.h>
|
| 39 |
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|
| 40 |
|
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#include <net/ndisc.h>
|
| 41 |
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#include <net/protocol.h>
|
| 42 |
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#include <net/transp_v6.h>
|
| 43 |
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#include <net/ip6_route.h>
|
| 44 |
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#include <net/raw.h>
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| 45 |
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#include <net/tcp_states.h>
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| 46 |
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#include <net/ip6_checksum.h>
|
| 47 |
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#include <net/xfrm.h>
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| 48 |
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|
| 49 |
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#include <linux/proc_fs.h>
|
| 50 |
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#include <linux/seq_file.h>
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| 51 |
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#include "udp_impl.h"
|
| 52 |
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|
| 53 |
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DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly;
|
| 54 |
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|
| 55 |
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static inline int udp_v6_get_port(struct sock *sk, unsigned short snum)
|
| 56 |
|
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{
|
| 57 |
|
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return udp_get_port(sk, snum, ipv6_rcv_saddr_equal);
|
| 58 |
|
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}
|
| 59 |
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|
| 60 |
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static struct sock *__udp6_lib_lookup(struct in6_addr *saddr, __be16 sport,
|
| 61 |
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struct in6_addr *daddr, __be16 dport,
|
| 62 |
|
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int dif, struct hlist_head udptable[])
|
| 63 |
|
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{
|
| 64 |
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struct sock *sk, *result = NULL;
|
| 65 |
|
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struct hlist_node *node;
|
| 66 |
|
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unsigned short hnum = ntohs(dport);
|
| 67 |
|
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int badness = -1;
|
| 68 |
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|
|
| 69 |
|
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read_lock(&udp_hash_lock);
|
| 70 |
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sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) {
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| 71 |
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struct inet_sock *inet = inet_sk(sk);
|
| 72 |
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|
| 73 |
|
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if (sk->sk_hash == hnum && sk->sk_family == PF_INET6) {
|
| 74 |
|
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struct ipv6_pinfo *np = inet6_sk(sk);
|
| 75 |
|
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int score = 0;
|
| 76 |
|
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if (inet->dport) {
|
| 77 |
|
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if (inet->dport != sport)
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| 78 |
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continue;
|
| 79 |
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score++;
|
| 80 |
|
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}
|
| 81 |
|
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if (!ipv6_addr_any(&np->rcv_saddr)) {
|
| 82 |
|
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if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
|
| 83 |
|
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continue;
|
| 84 |
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score++;
|
| 85 |
|
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}
|
| 86 |
|
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if (!ipv6_addr_any(&np->daddr)) {
|
| 87 |
|
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if (!ipv6_addr_equal(&np->daddr, saddr))
|
| 88 |
|
|
continue;
|
| 89 |
|
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score++;
|
| 90 |
|
|
}
|
| 91 |
|
|
if (sk->sk_bound_dev_if) {
|
| 92 |
|
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if (sk->sk_bound_dev_if != dif)
|
| 93 |
|
|
continue;
|
| 94 |
|
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score++;
|
| 95 |
|
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}
|
| 96 |
|
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if (score == 4) {
|
| 97 |
|
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result = sk;
|
| 98 |
|
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break;
|
| 99 |
|
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} else if (score > badness) {
|
| 100 |
|
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result = sk;
|
| 101 |
|
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badness = score;
|
| 102 |
|
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}
|
| 103 |
|
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}
|
| 104 |
|
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}
|
| 105 |
|
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if (result)
|
| 106 |
|
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sock_hold(result);
|
| 107 |
|
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read_unlock(&udp_hash_lock);
|
| 108 |
|
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return result;
|
| 109 |
|
|
}
|
| 110 |
|
|
|
| 111 |
|
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/*
|
| 112 |
|
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* This should be easy, if there is something there we
|
| 113 |
|
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* return it, otherwise we block.
|
| 114 |
|
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*/
|
| 115 |
|
|
|
| 116 |
|
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int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk,
|
| 117 |
|
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struct msghdr *msg, size_t len,
|
| 118 |
|
|
int noblock, int flags, int *addr_len)
|
| 119 |
|
|
{
|
| 120 |
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
| 121 |
|
|
struct inet_sock *inet = inet_sk(sk);
|
| 122 |
|
|
struct sk_buff *skb;
|
| 123 |
|
|
unsigned int ulen, copied;
|
| 124 |
|
|
int err;
|
| 125 |
|
|
int is_udplite = IS_UDPLITE(sk);
|
| 126 |
|
|
|
| 127 |
|
|
if (addr_len)
|
| 128 |
|
|
*addr_len=sizeof(struct sockaddr_in6);
|
| 129 |
|
|
|
| 130 |
|
|
if (flags & MSG_ERRQUEUE)
|
| 131 |
|
|
return ipv6_recv_error(sk, msg, len);
|
| 132 |
|
|
|
| 133 |
|
|
try_again:
|
| 134 |
|
|
skb = skb_recv_datagram(sk, flags, noblock, &err);
|
| 135 |
|
|
if (!skb)
|
| 136 |
|
|
goto out;
|
| 137 |
|
|
|
| 138 |
|
|
ulen = skb->len - sizeof(struct udphdr);
|
| 139 |
|
|
copied = len;
|
| 140 |
|
|
if (copied > ulen)
|
| 141 |
|
|
copied = ulen;
|
| 142 |
|
|
else if (copied < ulen)
|
| 143 |
|
|
msg->msg_flags |= MSG_TRUNC;
|
| 144 |
|
|
|
| 145 |
|
|
/*
|
| 146 |
|
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* If checksum is needed at all, try to do it while copying the
|
| 147 |
|
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* data. If the data is truncated, or if we only want a partial
|
| 148 |
|
|
* coverage checksum (UDP-Lite), do it before the copy.
|
| 149 |
|
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*/
|
| 150 |
|
|
|
| 151 |
|
|
if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) {
|
| 152 |
|
|
if (udp_lib_checksum_complete(skb))
|
| 153 |
|
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goto csum_copy_err;
|
| 154 |
|
|
}
|
| 155 |
|
|
|
| 156 |
|
|
if (skb_csum_unnecessary(skb))
|
| 157 |
|
|
err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
|
| 158 |
|
|
msg->msg_iov, copied );
|
| 159 |
|
|
else {
|
| 160 |
|
|
err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov);
|
| 161 |
|
|
if (err == -EINVAL)
|
| 162 |
|
|
goto csum_copy_err;
|
| 163 |
|
|
}
|
| 164 |
|
|
if (err)
|
| 165 |
|
|
goto out_free;
|
| 166 |
|
|
|
| 167 |
|
|
sock_recv_timestamp(msg, sk, skb);
|
| 168 |
|
|
|
| 169 |
|
|
/* Copy the address. */
|
| 170 |
|
|
if (msg->msg_name) {
|
| 171 |
|
|
struct sockaddr_in6 *sin6;
|
| 172 |
|
|
|
| 173 |
|
|
sin6 = (struct sockaddr_in6 *) msg->msg_name;
|
| 174 |
|
|
sin6->sin6_family = AF_INET6;
|
| 175 |
|
|
sin6->sin6_port = udp_hdr(skb)->source;
|
| 176 |
|
|
sin6->sin6_flowinfo = 0;
|
| 177 |
|
|
sin6->sin6_scope_id = 0;
|
| 178 |
|
|
|
| 179 |
|
|
if (skb->protocol == htons(ETH_P_IP))
|
| 180 |
|
|
ipv6_addr_set(&sin6->sin6_addr, 0, 0,
|
| 181 |
|
|
htonl(0xffff), ip_hdr(skb)->saddr);
|
| 182 |
|
|
else {
|
| 183 |
|
|
ipv6_addr_copy(&sin6->sin6_addr,
|
| 184 |
|
|
&ipv6_hdr(skb)->saddr);
|
| 185 |
|
|
if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
|
| 186 |
|
|
sin6->sin6_scope_id = IP6CB(skb)->iif;
|
| 187 |
|
|
}
|
| 188 |
|
|
|
| 189 |
|
|
}
|
| 190 |
|
|
if (skb->protocol == htons(ETH_P_IP)) {
|
| 191 |
|
|
if (inet->cmsg_flags)
|
| 192 |
|
|
ip_cmsg_recv(msg, skb);
|
| 193 |
|
|
} else {
|
| 194 |
|
|
if (np->rxopt.all)
|
| 195 |
|
|
datagram_recv_ctl(sk, msg, skb);
|
| 196 |
|
|
}
|
| 197 |
|
|
|
| 198 |
|
|
err = copied;
|
| 199 |
|
|
if (flags & MSG_TRUNC)
|
| 200 |
|
|
err = ulen;
|
| 201 |
|
|
|
| 202 |
|
|
out_free:
|
| 203 |
|
|
skb_free_datagram(sk, skb);
|
| 204 |
|
|
out:
|
| 205 |
|
|
return err;
|
| 206 |
|
|
|
| 207 |
|
|
csum_copy_err:
|
| 208 |
|
|
UDP6_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite);
|
| 209 |
|
|
skb_kill_datagram(sk, skb, flags);
|
| 210 |
|
|
|
| 211 |
|
|
if (flags & MSG_DONTWAIT)
|
| 212 |
|
|
return -EAGAIN;
|
| 213 |
|
|
goto try_again;
|
| 214 |
|
|
}
|
| 215 |
|
|
|
| 216 |
|
|
void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
|
| 217 |
|
|
int type, int code, int offset, __be32 info,
|
| 218 |
|
|
struct hlist_head udptable[] )
|
| 219 |
|
|
{
|
| 220 |
|
|
struct ipv6_pinfo *np;
|
| 221 |
|
|
struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
|
| 222 |
|
|
struct in6_addr *saddr = &hdr->saddr;
|
| 223 |
|
|
struct in6_addr *daddr = &hdr->daddr;
|
| 224 |
|
|
struct udphdr *uh = (struct udphdr*)(skb->data+offset);
|
| 225 |
|
|
struct sock *sk;
|
| 226 |
|
|
int err;
|
| 227 |
|
|
|
| 228 |
|
|
sk = __udp6_lib_lookup(daddr, uh->dest,
|
| 229 |
|
|
saddr, uh->source, inet6_iif(skb), udptable);
|
| 230 |
|
|
if (sk == NULL)
|
| 231 |
|
|
return;
|
| 232 |
|
|
|
| 233 |
|
|
np = inet6_sk(sk);
|
| 234 |
|
|
|
| 235 |
|
|
if (!icmpv6_err_convert(type, code, &err) && !np->recverr)
|
| 236 |
|
|
goto out;
|
| 237 |
|
|
|
| 238 |
|
|
if (sk->sk_state != TCP_ESTABLISHED && !np->recverr)
|
| 239 |
|
|
goto out;
|
| 240 |
|
|
|
| 241 |
|
|
if (np->recverr)
|
| 242 |
|
|
ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1));
|
| 243 |
|
|
|
| 244 |
|
|
sk->sk_err = err;
|
| 245 |
|
|
sk->sk_error_report(sk);
|
| 246 |
|
|
out:
|
| 247 |
|
|
sock_put(sk);
|
| 248 |
|
|
}
|
| 249 |
|
|
|
| 250 |
|
|
static __inline__ void udpv6_err(struct sk_buff *skb,
|
| 251 |
|
|
struct inet6_skb_parm *opt, int type,
|
| 252 |
|
|
int code, int offset, __be32 info )
|
| 253 |
|
|
{
|
| 254 |
|
|
return __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash);
|
| 255 |
|
|
}
|
| 256 |
|
|
|
| 257 |
|
|
int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
|
| 258 |
|
|
{
|
| 259 |
|
|
struct udp_sock *up = udp_sk(sk);
|
| 260 |
|
|
int rc;
|
| 261 |
|
|
|
| 262 |
|
|
if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
|
| 263 |
|
|
goto drop;
|
| 264 |
|
|
|
| 265 |
|
|
/*
|
| 266 |
|
|
* UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c).
|
| 267 |
|
|
*/
|
| 268 |
|
|
if ((up->pcflag & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) {
|
| 269 |
|
|
|
| 270 |
|
|
if (up->pcrlen == 0) { /* full coverage was set */
|
| 271 |
|
|
LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage"
|
| 272 |
|
|
" %d while full coverage %d requested\n",
|
| 273 |
|
|
UDP_SKB_CB(skb)->cscov, skb->len);
|
| 274 |
|
|
goto drop;
|
| 275 |
|
|
}
|
| 276 |
|
|
if (UDP_SKB_CB(skb)->cscov < up->pcrlen) {
|
| 277 |
|
|
LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d "
|
| 278 |
|
|
"too small, need min %d\n",
|
| 279 |
|
|
UDP_SKB_CB(skb)->cscov, up->pcrlen);
|
| 280 |
|
|
goto drop;
|
| 281 |
|
|
}
|
| 282 |
|
|
}
|
| 283 |
|
|
|
| 284 |
|
|
if (sk->sk_filter) {
|
| 285 |
|
|
if (udp_lib_checksum_complete(skb))
|
| 286 |
|
|
goto drop;
|
| 287 |
|
|
}
|
| 288 |
|
|
|
| 289 |
|
|
if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
|
| 290 |
|
|
/* Note that an ENOMEM error is charged twice */
|
| 291 |
|
|
if (rc == -ENOMEM)
|
| 292 |
|
|
UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, up->pcflag);
|
| 293 |
|
|
goto drop;
|
| 294 |
|
|
}
|
| 295 |
|
|
UDP6_INC_STATS_BH(UDP_MIB_INDATAGRAMS, up->pcflag);
|
| 296 |
|
|
return 0;
|
| 297 |
|
|
drop:
|
| 298 |
|
|
UDP6_INC_STATS_BH(UDP_MIB_INERRORS, up->pcflag);
|
| 299 |
|
|
kfree_skb(skb);
|
| 300 |
|
|
return -1;
|
| 301 |
|
|
}
|
| 302 |
|
|
|
| 303 |
|
|
static struct sock *udp_v6_mcast_next(struct sock *sk,
|
| 304 |
|
|
__be16 loc_port, struct in6_addr *loc_addr,
|
| 305 |
|
|
__be16 rmt_port, struct in6_addr *rmt_addr,
|
| 306 |
|
|
int dif)
|
| 307 |
|
|
{
|
| 308 |
|
|
struct hlist_node *node;
|
| 309 |
|
|
struct sock *s = sk;
|
| 310 |
|
|
unsigned short num = ntohs(loc_port);
|
| 311 |
|
|
|
| 312 |
|
|
sk_for_each_from(s, node) {
|
| 313 |
|
|
struct inet_sock *inet = inet_sk(s);
|
| 314 |
|
|
|
| 315 |
|
|
if (s->sk_hash == num && s->sk_family == PF_INET6) {
|
| 316 |
|
|
struct ipv6_pinfo *np = inet6_sk(s);
|
| 317 |
|
|
if (inet->dport) {
|
| 318 |
|
|
if (inet->dport != rmt_port)
|
| 319 |
|
|
continue;
|
| 320 |
|
|
}
|
| 321 |
|
|
if (!ipv6_addr_any(&np->daddr) &&
|
| 322 |
|
|
!ipv6_addr_equal(&np->daddr, rmt_addr))
|
| 323 |
|
|
continue;
|
| 324 |
|
|
|
| 325 |
|
|
if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif)
|
| 326 |
|
|
continue;
|
| 327 |
|
|
|
| 328 |
|
|
if (!ipv6_addr_any(&np->rcv_saddr)) {
|
| 329 |
|
|
if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr))
|
| 330 |
|
|
continue;
|
| 331 |
|
|
}
|
| 332 |
|
|
if (!inet6_mc_check(s, loc_addr, rmt_addr))
|
| 333 |
|
|
continue;
|
| 334 |
|
|
return s;
|
| 335 |
|
|
}
|
| 336 |
|
|
}
|
| 337 |
|
|
return NULL;
|
| 338 |
|
|
}
|
| 339 |
|
|
|
| 340 |
|
|
/*
|
| 341 |
|
|
* Note: called only from the BH handler context,
|
| 342 |
|
|
* so we don't need to lock the hashes.
|
| 343 |
|
|
*/
|
| 344 |
|
|
static int __udp6_lib_mcast_deliver(struct sk_buff *skb, struct in6_addr *saddr,
|
| 345 |
|
|
struct in6_addr *daddr, struct hlist_head udptable[])
|
| 346 |
|
|
{
|
| 347 |
|
|
struct sock *sk, *sk2;
|
| 348 |
|
|
const struct udphdr *uh = udp_hdr(skb);
|
| 349 |
|
|
int dif;
|
| 350 |
|
|
|
| 351 |
|
|
read_lock(&udp_hash_lock);
|
| 352 |
|
|
sk = sk_head(&udptable[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)]);
|
| 353 |
|
|
dif = inet6_iif(skb);
|
| 354 |
|
|
sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif);
|
| 355 |
|
|
if (!sk) {
|
| 356 |
|
|
kfree_skb(skb);
|
| 357 |
|
|
goto out;
|
| 358 |
|
|
}
|
| 359 |
|
|
|
| 360 |
|
|
sk2 = sk;
|
| 361 |
|
|
while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr,
|
| 362 |
|
|
uh->source, saddr, dif))) {
|
| 363 |
|
|
struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC);
|
| 364 |
|
|
if (buff)
|
| 365 |
|
|
udpv6_queue_rcv_skb(sk2, buff);
|
| 366 |
|
|
}
|
| 367 |
|
|
udpv6_queue_rcv_skb(sk, skb);
|
| 368 |
|
|
out:
|
| 369 |
|
|
read_unlock(&udp_hash_lock);
|
| 370 |
|
|
return 0;
|
| 371 |
|
|
}
|
| 372 |
|
|
|
| 373 |
|
|
static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh,
|
| 374 |
|
|
int proto)
|
| 375 |
|
|
{
|
| 376 |
|
|
int err;
|
| 377 |
|
|
|
| 378 |
|
|
UDP_SKB_CB(skb)->partial_cov = 0;
|
| 379 |
|
|
UDP_SKB_CB(skb)->cscov = skb->len;
|
| 380 |
|
|
|
| 381 |
|
|
if (proto == IPPROTO_UDPLITE) {
|
| 382 |
|
|
err = udplite_checksum_init(skb, uh);
|
| 383 |
|
|
if (err)
|
| 384 |
|
|
return err;
|
| 385 |
|
|
}
|
| 386 |
|
|
|
| 387 |
|
|
if (uh->check == 0) {
|
| 388 |
|
|
/* RFC 2460 section 8.1 says that we SHOULD log
|
| 389 |
|
|
this error. Well, it is reasonable.
|
| 390 |
|
|
*/
|
| 391 |
|
|
LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n");
|
| 392 |
|
|
return 1;
|
| 393 |
|
|
}
|
| 394 |
|
|
if (skb->ip_summed == CHECKSUM_COMPLETE &&
|
| 395 |
|
|
!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
|
| 396 |
|
|
skb->len, proto, skb->csum))
|
| 397 |
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
| 398 |
|
|
|
| 399 |
|
|
if (!skb_csum_unnecessary(skb))
|
| 400 |
|
|
skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
|
| 401 |
|
|
&ipv6_hdr(skb)->daddr,
|
| 402 |
|
|
skb->len, proto, 0));
|
| 403 |
|
|
|
| 404 |
|
|
return 0;
|
| 405 |
|
|
}
|
| 406 |
|
|
|
| 407 |
|
|
int __udp6_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
|
| 408 |
|
|
int proto)
|
| 409 |
|
|
{
|
| 410 |
|
|
struct sock *sk;
|
| 411 |
|
|
struct udphdr *uh;
|
| 412 |
|
|
struct net_device *dev = skb->dev;
|
| 413 |
|
|
struct in6_addr *saddr, *daddr;
|
| 414 |
|
|
u32 ulen = 0;
|
| 415 |
|
|
|
| 416 |
|
|
if (!pskb_may_pull(skb, sizeof(struct udphdr)))
|
| 417 |
|
|
goto short_packet;
|
| 418 |
|
|
|
| 419 |
|
|
saddr = &ipv6_hdr(skb)->saddr;
|
| 420 |
|
|
daddr = &ipv6_hdr(skb)->daddr;
|
| 421 |
|
|
uh = udp_hdr(skb);
|
| 422 |
|
|
|
| 423 |
|
|
ulen = ntohs(uh->len);
|
| 424 |
|
|
if (ulen > skb->len)
|
| 425 |
|
|
goto short_packet;
|
| 426 |
|
|
|
| 427 |
|
|
if (proto == IPPROTO_UDP) {
|
| 428 |
|
|
/* UDP validates ulen. */
|
| 429 |
|
|
|
| 430 |
|
|
/* Check for jumbo payload */
|
| 431 |
|
|
if (ulen == 0)
|
| 432 |
|
|
ulen = skb->len;
|
| 433 |
|
|
|
| 434 |
|
|
if (ulen < sizeof(*uh))
|
| 435 |
|
|
goto short_packet;
|
| 436 |
|
|
|
| 437 |
|
|
if (ulen < skb->len) {
|
| 438 |
|
|
if (pskb_trim_rcsum(skb, ulen))
|
| 439 |
|
|
goto short_packet;
|
| 440 |
|
|
saddr = &ipv6_hdr(skb)->saddr;
|
| 441 |
|
|
daddr = &ipv6_hdr(skb)->daddr;
|
| 442 |
|
|
uh = udp_hdr(skb);
|
| 443 |
|
|
}
|
| 444 |
|
|
}
|
| 445 |
|
|
|
| 446 |
|
|
if (udp6_csum_init(skb, uh, proto))
|
| 447 |
|
|
goto discard;
|
| 448 |
|
|
|
| 449 |
|
|
/*
|
| 450 |
|
|
* Multicast receive code
|
| 451 |
|
|
*/
|
| 452 |
|
|
if (ipv6_addr_is_multicast(daddr))
|
| 453 |
|
|
return __udp6_lib_mcast_deliver(skb, saddr, daddr, udptable);
|
| 454 |
|
|
|
| 455 |
|
|
/* Unicast */
|
| 456 |
|
|
|
| 457 |
|
|
/*
|
| 458 |
|
|
* check socket cache ... must talk to Alan about his plans
|
| 459 |
|
|
* for sock caches... i'll skip this for now.
|
| 460 |
|
|
*/
|
| 461 |
|
|
sk = __udp6_lib_lookup(saddr, uh->source,
|
| 462 |
|
|
daddr, uh->dest, inet6_iif(skb), udptable);
|
| 463 |
|
|
|
| 464 |
|
|
if (sk == NULL) {
|
| 465 |
|
|
if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
|
| 466 |
|
|
goto discard;
|
| 467 |
|
|
|
| 468 |
|
|
if (udp_lib_checksum_complete(skb))
|
| 469 |
|
|
goto discard;
|
| 470 |
|
|
UDP6_INC_STATS_BH(UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE);
|
| 471 |
|
|
|
| 472 |
|
|
icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev);
|
| 473 |
|
|
|
| 474 |
|
|
kfree_skb(skb);
|
| 475 |
|
|
return 0;
|
| 476 |
|
|
}
|
| 477 |
|
|
|
| 478 |
|
|
/* deliver */
|
| 479 |
|
|
|
| 480 |
|
|
udpv6_queue_rcv_skb(sk, skb);
|
| 481 |
|
|
sock_put(sk);
|
| 482 |
|
|
return 0;
|
| 483 |
|
|
|
| 484 |
|
|
short_packet:
|
| 485 |
|
|
LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n",
|
| 486 |
|
|
proto == IPPROTO_UDPLITE ? "-Lite" : "",
|
| 487 |
|
|
ulen, skb->len);
|
| 488 |
|
|
|
| 489 |
|
|
discard:
|
| 490 |
|
|
UDP6_INC_STATS_BH(UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE);
|
| 491 |
|
|
kfree_skb(skb);
|
| 492 |
|
|
return 0;
|
| 493 |
|
|
}
|
| 494 |
|
|
|
| 495 |
|
|
static __inline__ int udpv6_rcv(struct sk_buff *skb)
|
| 496 |
|
|
{
|
| 497 |
|
|
return __udp6_lib_rcv(skb, udp_hash, IPPROTO_UDP);
|
| 498 |
|
|
}
|
| 499 |
|
|
|
| 500 |
|
|
/*
|
| 501 |
|
|
* Throw away all pending data and cancel the corking. Socket is locked.
|
| 502 |
|
|
*/
|
| 503 |
|
|
static void udp_v6_flush_pending_frames(struct sock *sk)
|
| 504 |
|
|
{
|
| 505 |
|
|
struct udp_sock *up = udp_sk(sk);
|
| 506 |
|
|
|
| 507 |
|
|
if (up->pending) {
|
| 508 |
|
|
up->len = 0;
|
| 509 |
|
|
up->pending = 0;
|
| 510 |
|
|
ip6_flush_pending_frames(sk);
|
| 511 |
|
|
}
|
| 512 |
|
|
}
|
| 513 |
|
|
|
| 514 |
|
|
/*
|
| 515 |
|
|
* Sending
|
| 516 |
|
|
*/
|
| 517 |
|
|
|
| 518 |
|
|
static int udp_v6_push_pending_frames(struct sock *sk)
|
| 519 |
|
|
{
|
| 520 |
|
|
struct sk_buff *skb;
|
| 521 |
|
|
struct udphdr *uh;
|
| 522 |
|
|
struct udp_sock *up = udp_sk(sk);
|
| 523 |
|
|
struct inet_sock *inet = inet_sk(sk);
|
| 524 |
|
|
struct flowi *fl = &inet->cork.fl;
|
| 525 |
|
|
int err = 0;
|
| 526 |
|
|
__wsum csum = 0;
|
| 527 |
|
|
|
| 528 |
|
|
/* Grab the skbuff where UDP header space exists. */
|
| 529 |
|
|
if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
|
| 530 |
|
|
goto out;
|
| 531 |
|
|
|
| 532 |
|
|
/*
|
| 533 |
|
|
* Create a UDP header
|
| 534 |
|
|
*/
|
| 535 |
|
|
uh = udp_hdr(skb);
|
| 536 |
|
|
uh->source = fl->fl_ip_sport;
|
| 537 |
|
|
uh->dest = fl->fl_ip_dport;
|
| 538 |
|
|
uh->len = htons(up->len);
|
| 539 |
|
|
uh->check = 0;
|
| 540 |
|
|
|
| 541 |
|
|
if (up->pcflag)
|
| 542 |
|
|
csum = udplite_csum_outgoing(sk, skb);
|
| 543 |
|
|
else
|
| 544 |
|
|
csum = udp_csum_outgoing(sk, skb);
|
| 545 |
|
|
|
| 546 |
|
|
/* add protocol-dependent pseudo-header */
|
| 547 |
|
|
uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst,
|
| 548 |
|
|
up->len, fl->proto, csum );
|
| 549 |
|
|
if (uh->check == 0)
|
| 550 |
|
|
uh->check = CSUM_MANGLED_0;
|
| 551 |
|
|
|
| 552 |
|
|
err = ip6_push_pending_frames(sk);
|
| 553 |
|
|
out:
|
| 554 |
|
|
up->len = 0;
|
| 555 |
|
|
up->pending = 0;
|
| 556 |
|
|
if (!err)
|
| 557 |
|
|
UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS, up->pcflag);
|
| 558 |
|
|
return err;
|
| 559 |
|
|
}
|
| 560 |
|
|
|
| 561 |
|
|
int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
|
| 562 |
|
|
struct msghdr *msg, size_t len)
|
| 563 |
|
|
{
|
| 564 |
|
|
struct ipv6_txoptions opt_space;
|
| 565 |
|
|
struct udp_sock *up = udp_sk(sk);
|
| 566 |
|
|
struct inet_sock *inet = inet_sk(sk);
|
| 567 |
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
| 568 |
|
|
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name;
|
| 569 |
|
|
struct in6_addr *daddr, *final_p = NULL, final;
|
| 570 |
|
|
struct ipv6_txoptions *opt = NULL;
|
| 571 |
|
|
struct ip6_flowlabel *flowlabel = NULL;
|
| 572 |
|
|
struct flowi fl;
|
| 573 |
|
|
struct dst_entry *dst;
|
| 574 |
|
|
int addr_len = msg->msg_namelen;
|
| 575 |
|
|
int ulen = len;
|
| 576 |
|
|
int hlimit = -1;
|
| 577 |
|
|
int tclass = -1;
|
| 578 |
|
|
int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
|
| 579 |
|
|
int err;
|
| 580 |
|
|
int connected = 0;
|
| 581 |
|
|
int is_udplite = up->pcflag;
|
| 582 |
|
|
int (*getfrag)(void *, char *, int, int, int, struct sk_buff *);
|
| 583 |
|
|
|
| 584 |
|
|
/* destination address check */
|
| 585 |
|
|
if (sin6) {
|
| 586 |
|
|
if (addr_len < offsetof(struct sockaddr, sa_data))
|
| 587 |
|
|
return -EINVAL;
|
| 588 |
|
|
|
| 589 |
|
|
switch (sin6->sin6_family) {
|
| 590 |
|
|
case AF_INET6:
|
| 591 |
|
|
if (addr_len < SIN6_LEN_RFC2133)
|
| 592 |
|
|
return -EINVAL;
|
| 593 |
|
|
daddr = &sin6->sin6_addr;
|
| 594 |
|
|
break;
|
| 595 |
|
|
case AF_INET:
|
| 596 |
|
|
goto do_udp_sendmsg;
|
| 597 |
|
|
case AF_UNSPEC:
|
| 598 |
|
|
msg->msg_name = sin6 = NULL;
|
| 599 |
|
|
msg->msg_namelen = addr_len = 0;
|
| 600 |
|
|
daddr = NULL;
|
| 601 |
|
|
break;
|
| 602 |
|
|
default:
|
| 603 |
|
|
return -EINVAL;
|
| 604 |
|
|
}
|
| 605 |
|
|
} else if (!up->pending) {
|
| 606 |
|
|
if (sk->sk_state != TCP_ESTABLISHED)
|
| 607 |
|
|
return -EDESTADDRREQ;
|
| 608 |
|
|
daddr = &np->daddr;
|
| 609 |
|
|
} else
|
| 610 |
|
|
daddr = NULL;
|
| 611 |
|
|
|
| 612 |
|
|
if (daddr) {
|
| 613 |
|
|
if (ipv6_addr_v4mapped(daddr)) {
|
| 614 |
|
|
struct sockaddr_in sin;
|
| 615 |
|
|
sin.sin_family = AF_INET;
|
| 616 |
|
|
sin.sin_port = sin6 ? sin6->sin6_port : inet->dport;
|
| 617 |
|
|
sin.sin_addr.s_addr = daddr->s6_addr32[3];
|
| 618 |
|
|
msg->msg_name = &sin;
|
| 619 |
|
|
msg->msg_namelen = sizeof(sin);
|
| 620 |
|
|
do_udp_sendmsg:
|
| 621 |
|
|
if (__ipv6_only_sock(sk))
|
| 622 |
|
|
return -ENETUNREACH;
|
| 623 |
|
|
return udp_sendmsg(iocb, sk, msg, len);
|
| 624 |
|
|
}
|
| 625 |
|
|
}
|
| 626 |
|
|
|
| 627 |
|
|
if (up->pending == AF_INET)
|
| 628 |
|
|
return udp_sendmsg(iocb, sk, msg, len);
|
| 629 |
|
|
|
| 630 |
|
|
/* Rough check on arithmetic overflow,
|
| 631 |
|
|
better check is made in ip6_append_data().
|
| 632 |
|
|
*/
|
| 633 |
|
|
if (len > INT_MAX - sizeof(struct udphdr))
|
| 634 |
|
|
return -EMSGSIZE;
|
| 635 |
|
|
|
| 636 |
|
|
if (up->pending) {
|
| 637 |
|
|
/*
|
| 638 |
|
|
* There are pending frames.
|
| 639 |
|
|
* The socket lock must be held while it's corked.
|
| 640 |
|
|
*/
|
| 641 |
|
|
lock_sock(sk);
|
| 642 |
|
|
if (likely(up->pending)) {
|
| 643 |
|
|
if (unlikely(up->pending != AF_INET6)) {
|
| 644 |
|
|
release_sock(sk);
|
| 645 |
|
|
return -EAFNOSUPPORT;
|
| 646 |
|
|
}
|
| 647 |
|
|
dst = NULL;
|
| 648 |
|
|
goto do_append_data;
|
| 649 |
|
|
}
|
| 650 |
|
|
release_sock(sk);
|
| 651 |
|
|
}
|
| 652 |
|
|
ulen += sizeof(struct udphdr);
|
| 653 |
|
|
|
| 654 |
|
|
memset(&fl, 0, sizeof(fl));
|
| 655 |
|
|
|
| 656 |
|
|
if (sin6) {
|
| 657 |
|
|
if (sin6->sin6_port == 0)
|
| 658 |
|
|
return -EINVAL;
|
| 659 |
|
|
|
| 660 |
|
|
fl.fl_ip_dport = sin6->sin6_port;
|
| 661 |
|
|
daddr = &sin6->sin6_addr;
|
| 662 |
|
|
|
| 663 |
|
|
if (np->sndflow) {
|
| 664 |
|
|
fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
|
| 665 |
|
|
if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
|
| 666 |
|
|
flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
|
| 667 |
|
|
if (flowlabel == NULL)
|
| 668 |
|
|
return -EINVAL;
|
| 669 |
|
|
daddr = &flowlabel->dst;
|
| 670 |
|
|
}
|
| 671 |
|
|
}
|
| 672 |
|
|
|
| 673 |
|
|
/*
|
| 674 |
|
|
* Otherwise it will be difficult to maintain
|
| 675 |
|
|
* sk->sk_dst_cache.
|
| 676 |
|
|
*/
|
| 677 |
|
|
if (sk->sk_state == TCP_ESTABLISHED &&
|
| 678 |
|
|
ipv6_addr_equal(daddr, &np->daddr))
|
| 679 |
|
|
daddr = &np->daddr;
|
| 680 |
|
|
|
| 681 |
|
|
if (addr_len >= sizeof(struct sockaddr_in6) &&
|
| 682 |
|
|
sin6->sin6_scope_id &&
|
| 683 |
|
|
ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
|
| 684 |
|
|
fl.oif = sin6->sin6_scope_id;
|
| 685 |
|
|
} else {
|
| 686 |
|
|
if (sk->sk_state != TCP_ESTABLISHED)
|
| 687 |
|
|
return -EDESTADDRREQ;
|
| 688 |
|
|
|
| 689 |
|
|
fl.fl_ip_dport = inet->dport;
|
| 690 |
|
|
daddr = &np->daddr;
|
| 691 |
|
|
fl.fl6_flowlabel = np->flow_label;
|
| 692 |
|
|
connected = 1;
|
| 693 |
|
|
}
|
| 694 |
|
|
|
| 695 |
|
|
if (!fl.oif)
|
| 696 |
|
|
fl.oif = sk->sk_bound_dev_if;
|
| 697 |
|
|
|
| 698 |
|
|
if (msg->msg_controllen) {
|
| 699 |
|
|
opt = &opt_space;
|
| 700 |
|
|
memset(opt, 0, sizeof(struct ipv6_txoptions));
|
| 701 |
|
|
opt->tot_len = sizeof(*opt);
|
| 702 |
|
|
|
| 703 |
|
|
err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
|
| 704 |
|
|
if (err < 0) {
|
| 705 |
|
|
fl6_sock_release(flowlabel);
|
| 706 |
|
|
return err;
|
| 707 |
|
|
}
|
| 708 |
|
|
if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
|
| 709 |
|
|
flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
|
| 710 |
|
|
if (flowlabel == NULL)
|
| 711 |
|
|
return -EINVAL;
|
| 712 |
|
|
}
|
| 713 |
|
|
if (!(opt->opt_nflen|opt->opt_flen))
|
| 714 |
|
|
opt = NULL;
|
| 715 |
|
|
connected = 0;
|
| 716 |
|
|
}
|
| 717 |
|
|
if (opt == NULL)
|
| 718 |
|
|
opt = np->opt;
|
| 719 |
|
|
if (flowlabel)
|
| 720 |
|
|
opt = fl6_merge_options(&opt_space, flowlabel, opt);
|
| 721 |
|
|
opt = ipv6_fixup_options(&opt_space, opt);
|
| 722 |
|
|
|
| 723 |
|
|
fl.proto = sk->sk_protocol;
|
| 724 |
|
|
ipv6_addr_copy(&fl.fl6_dst, daddr);
|
| 725 |
|
|
if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
|
| 726 |
|
|
ipv6_addr_copy(&fl.fl6_src, &np->saddr);
|
| 727 |
|
|
fl.fl_ip_sport = inet->sport;
|
| 728 |
|
|
|
| 729 |
|
|
/* merge ip6_build_xmit from ip6_output */
|
| 730 |
|
|
if (opt && opt->srcrt) {
|
| 731 |
|
|
struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
|
| 732 |
|
|
ipv6_addr_copy(&final, &fl.fl6_dst);
|
| 733 |
|
|
ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
|
| 734 |
|
|
final_p = &final;
|
| 735 |
|
|
connected = 0;
|
| 736 |
|
|
}
|
| 737 |
|
|
|
| 738 |
|
|
if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) {
|
| 739 |
|
|
fl.oif = np->mcast_oif;
|
| 740 |
|
|
connected = 0;
|
| 741 |
|
|
}
|
| 742 |
|
|
|
| 743 |
|
|
security_sk_classify_flow(sk, &fl);
|
| 744 |
|
|
|
| 745 |
|
|
err = ip6_sk_dst_lookup(sk, &dst, &fl);
|
| 746 |
|
|
if (err)
|
| 747 |
|
|
goto out;
|
| 748 |
|
|
if (final_p)
|
| 749 |
|
|
ipv6_addr_copy(&fl.fl6_dst, final_p);
|
| 750 |
|
|
|
| 751 |
|
|
if ((err = __xfrm_lookup(&dst, &fl, sk, 1)) < 0) {
|
| 752 |
|
|
if (err == -EREMOTE)
|
| 753 |
|
|
err = ip6_dst_blackhole(sk, &dst, &fl);
|
| 754 |
|
|
if (err < 0)
|
| 755 |
|
|
goto out;
|
| 756 |
|
|
}
|
| 757 |
|
|
|
| 758 |
|
|
if (hlimit < 0) {
|
| 759 |
|
|
if (ipv6_addr_is_multicast(&fl.fl6_dst))
|
| 760 |
|
|
hlimit = np->mcast_hops;
|
| 761 |
|
|
else
|
| 762 |
|
|
hlimit = np->hop_limit;
|
| 763 |
|
|
if (hlimit < 0)
|
| 764 |
|
|
hlimit = dst_metric(dst, RTAX_HOPLIMIT);
|
| 765 |
|
|
if (hlimit < 0)
|
| 766 |
|
|
hlimit = ipv6_get_hoplimit(dst->dev);
|
| 767 |
|
|
}
|
| 768 |
|
|
|
| 769 |
|
|
if (tclass < 0) {
|
| 770 |
|
|
tclass = np->tclass;
|
| 771 |
|
|
if (tclass < 0)
|
| 772 |
|
|
tclass = 0;
|
| 773 |
|
|
}
|
| 774 |
|
|
|
| 775 |
|
|
if (msg->msg_flags&MSG_CONFIRM)
|
| 776 |
|
|
goto do_confirm;
|
| 777 |
|
|
back_from_confirm:
|
| 778 |
|
|
|
| 779 |
|
|
lock_sock(sk);
|
| 780 |
|
|
if (unlikely(up->pending)) {
|
| 781 |
|
|
/* The socket is already corked while preparing it. */
|
| 782 |
|
|
/* ... which is an evident application bug. --ANK */
|
| 783 |
|
|
release_sock(sk);
|
| 784 |
|
|
|
| 785 |
|
|
LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n");
|
| 786 |
|
|
err = -EINVAL;
|
| 787 |
|
|
goto out;
|
| 788 |
|
|
}
|
| 789 |
|
|
|
| 790 |
|
|
up->pending = AF_INET6;
|
| 791 |
|
|
|
| 792 |
|
|
do_append_data:
|
| 793 |
|
|
up->len += ulen;
|
| 794 |
|
|
getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag;
|
| 795 |
|
|
err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen,
|
| 796 |
|
|
sizeof(struct udphdr), hlimit, tclass, opt, &fl,
|
| 797 |
|
|
(struct rt6_info*)dst,
|
| 798 |
|
|
corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
|
| 799 |
|
|
if (err)
|
| 800 |
|
|
udp_v6_flush_pending_frames(sk);
|
| 801 |
|
|
else if (!corkreq)
|
| 802 |
|
|
err = udp_v6_push_pending_frames(sk);
|
| 803 |
|
|
else if (unlikely(skb_queue_empty(&sk->sk_write_queue)))
|
| 804 |
|
|
up->pending = 0;
|
| 805 |
|
|
|
| 806 |
|
|
if (dst) {
|
| 807 |
|
|
if (connected) {
|
| 808 |
|
|
ip6_dst_store(sk, dst,
|
| 809 |
|
|
ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ?
|
| 810 |
|
|
&np->daddr : NULL,
|
| 811 |
|
|
#ifdef CONFIG_IPV6_SUBTREES
|
| 812 |
|
|
ipv6_addr_equal(&fl.fl6_src, &np->saddr) ?
|
| 813 |
|
|
&np->saddr :
|
| 814 |
|
|
#endif
|
| 815 |
|
|
NULL);
|
| 816 |
|
|
} else {
|
| 817 |
|
|
dst_release(dst);
|
| 818 |
|
|
}
|
| 819 |
|
|
}
|
| 820 |
|
|
|
| 821 |
|
|
if (err > 0)
|
| 822 |
|
|
err = np->recverr ? net_xmit_errno(err) : 0;
|
| 823 |
|
|
release_sock(sk);
|
| 824 |
|
|
out:
|
| 825 |
|
|
fl6_sock_release(flowlabel);
|
| 826 |
|
|
if (!err)
|
| 827 |
|
|
return len;
|
| 828 |
|
|
/*
|
| 829 |
|
|
* ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
|
| 830 |
|
|
* ENOBUFS might not be good (it's not tunable per se), but otherwise
|
| 831 |
|
|
* we don't have a good statistic (IpOutDiscards but it can be too many
|
| 832 |
|
|
* things). We could add another new stat but at least for now that
|
| 833 |
|
|
* seems like overkill.
|
| 834 |
|
|
*/
|
| 835 |
|
|
if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
|
| 836 |
|
|
UDP6_INC_STATS_USER(UDP_MIB_SNDBUFERRORS, is_udplite);
|
| 837 |
|
|
}
|
| 838 |
|
|
return err;
|
| 839 |
|
|
|
| 840 |
|
|
do_confirm:
|
| 841 |
|
|
dst_confirm(dst);
|
| 842 |
|
|
if (!(msg->msg_flags&MSG_PROBE) || len)
|
| 843 |
|
|
goto back_from_confirm;
|
| 844 |
|
|
err = 0;
|
| 845 |
|
|
goto out;
|
| 846 |
|
|
}
|
| 847 |
|
|
|
| 848 |
|
|
int udpv6_destroy_sock(struct sock *sk)
|
| 849 |
|
|
{
|
| 850 |
|
|
lock_sock(sk);
|
| 851 |
|
|
udp_v6_flush_pending_frames(sk);
|
| 852 |
|
|
release_sock(sk);
|
| 853 |
|
|
|
| 854 |
|
|
inet6_destroy_sock(sk);
|
| 855 |
|
|
|
| 856 |
|
|
return 0;
|
| 857 |
|
|
}
|
| 858 |
|
|
|
| 859 |
|
|
/*
|
| 860 |
|
|
* Socket option code for UDP
|
| 861 |
|
|
*/
|
| 862 |
|
|
int udpv6_setsockopt(struct sock *sk, int level, int optname,
|
| 863 |
|
|
char __user *optval, int optlen)
|
| 864 |
|
|
{
|
| 865 |
|
|
if (level == SOL_UDP || level == SOL_UDPLITE)
|
| 866 |
|
|
return udp_lib_setsockopt(sk, level, optname, optval, optlen,
|
| 867 |
|
|
udp_v6_push_pending_frames);
|
| 868 |
|
|
return ipv6_setsockopt(sk, level, optname, optval, optlen);
|
| 869 |
|
|
}
|
| 870 |
|
|
|
| 871 |
|
|
#ifdef CONFIG_COMPAT
|
| 872 |
|
|
int compat_udpv6_setsockopt(struct sock *sk, int level, int optname,
|
| 873 |
|
|
char __user *optval, int optlen)
|
| 874 |
|
|
{
|
| 875 |
|
|
if (level == SOL_UDP || level == SOL_UDPLITE)
|
| 876 |
|
|
return udp_lib_setsockopt(sk, level, optname, optval, optlen,
|
| 877 |
|
|
udp_v6_push_pending_frames);
|
| 878 |
|
|
return compat_ipv6_setsockopt(sk, level, optname, optval, optlen);
|
| 879 |
|
|
}
|
| 880 |
|
|
#endif
|
| 881 |
|
|
|
| 882 |
|
|
int udpv6_getsockopt(struct sock *sk, int level, int optname,
|
| 883 |
|
|
char __user *optval, int __user *optlen)
|
| 884 |
|
|
{
|
| 885 |
|
|
if (level == SOL_UDP || level == SOL_UDPLITE)
|
| 886 |
|
|
return udp_lib_getsockopt(sk, level, optname, optval, optlen);
|
| 887 |
|
|
return ipv6_getsockopt(sk, level, optname, optval, optlen);
|
| 888 |
|
|
}
|
| 889 |
|
|
|
| 890 |
|
|
#ifdef CONFIG_COMPAT
|
| 891 |
|
|
int compat_udpv6_getsockopt(struct sock *sk, int level, int optname,
|
| 892 |
|
|
char __user *optval, int __user *optlen)
|
| 893 |
|
|
{
|
| 894 |
|
|
if (level == SOL_UDP || level == SOL_UDPLITE)
|
| 895 |
|
|
return udp_lib_getsockopt(sk, level, optname, optval, optlen);
|
| 896 |
|
|
return compat_ipv6_getsockopt(sk, level, optname, optval, optlen);
|
| 897 |
|
|
}
|
| 898 |
|
|
#endif
|
| 899 |
|
|
|
| 900 |
|
|
static struct inet6_protocol udpv6_protocol = {
|
| 901 |
|
|
.handler = udpv6_rcv,
|
| 902 |
|
|
.err_handler = udpv6_err,
|
| 903 |
|
|
.flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
|
| 904 |
|
|
};
|
| 905 |
|
|
|
| 906 |
|
|
/* ------------------------------------------------------------------------ */
|
| 907 |
|
|
#ifdef CONFIG_PROC_FS
|
| 908 |
|
|
|
| 909 |
|
|
static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket)
|
| 910 |
|
|
{
|
| 911 |
|
|
struct inet_sock *inet = inet_sk(sp);
|
| 912 |
|
|
struct ipv6_pinfo *np = inet6_sk(sp);
|
| 913 |
|
|
struct in6_addr *dest, *src;
|
| 914 |
|
|
__u16 destp, srcp;
|
| 915 |
|
|
|
| 916 |
|
|
dest = &np->daddr;
|
| 917 |
|
|
src = &np->rcv_saddr;
|
| 918 |
|
|
destp = ntohs(inet->dport);
|
| 919 |
|
|
srcp = ntohs(inet->sport);
|
| 920 |
|
|
seq_printf(seq,
|
| 921 |
|
|
"%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
|
| 922 |
|
|
"%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
|
| 923 |
|
|
bucket,
|
| 924 |
|
|
src->s6_addr32[0], src->s6_addr32[1],
|
| 925 |
|
|
src->s6_addr32[2], src->s6_addr32[3], srcp,
|
| 926 |
|
|
dest->s6_addr32[0], dest->s6_addr32[1],
|
| 927 |
|
|
dest->s6_addr32[2], dest->s6_addr32[3], destp,
|
| 928 |
|
|
sp->sk_state,
|
| 929 |
|
|
atomic_read(&sp->sk_wmem_alloc),
|
| 930 |
|
|
atomic_read(&sp->sk_rmem_alloc),
|
| 931 |
|
|
0, 0L, 0,
|
| 932 |
|
|
sock_i_uid(sp), 0,
|
| 933 |
|
|
sock_i_ino(sp),
|
| 934 |
|
|
atomic_read(&sp->sk_refcnt), sp);
|
| 935 |
|
|
}
|
| 936 |
|
|
|
| 937 |
|
|
int udp6_seq_show(struct seq_file *seq, void *v)
|
| 938 |
|
|
{
|
| 939 |
|
|
if (v == SEQ_START_TOKEN)
|
| 940 |
|
|
seq_printf(seq,
|
| 941 |
|
|
" sl "
|
| 942 |
|
|
"local_address "
|
| 943 |
|
|
"remote_address "
|
| 944 |
|
|
"st tx_queue rx_queue tr tm->when retrnsmt"
|
| 945 |
|
|
" uid timeout inode\n");
|
| 946 |
|
|
else
|
| 947 |
|
|
udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket);
|
| 948 |
|
|
return 0;
|
| 949 |
|
|
}
|
| 950 |
|
|
|
| 951 |
|
|
static struct file_operations udp6_seq_fops;
|
| 952 |
|
|
static struct udp_seq_afinfo udp6_seq_afinfo = {
|
| 953 |
|
|
.owner = THIS_MODULE,
|
| 954 |
|
|
.name = "udp6",
|
| 955 |
|
|
.family = AF_INET6,
|
| 956 |
|
|
.hashtable = udp_hash,
|
| 957 |
|
|
.seq_show = udp6_seq_show,
|
| 958 |
|
|
.seq_fops = &udp6_seq_fops,
|
| 959 |
|
|
};
|
| 960 |
|
|
|
| 961 |
|
|
int __init udp6_proc_init(void)
|
| 962 |
|
|
{
|
| 963 |
|
|
return udp_proc_register(&udp6_seq_afinfo);
|
| 964 |
|
|
}
|
| 965 |
|
|
|
| 966 |
|
|
void udp6_proc_exit(void) {
|
| 967 |
|
|
udp_proc_unregister(&udp6_seq_afinfo);
|
| 968 |
|
|
}
|
| 969 |
|
|
#endif /* CONFIG_PROC_FS */
|
| 970 |
|
|
|
| 971 |
|
|
/* ------------------------------------------------------------------------ */
|
| 972 |
|
|
|
| 973 |
|
|
DEFINE_PROTO_INUSE(udpv6)
|
| 974 |
|
|
|
| 975 |
|
|
struct proto udpv6_prot = {
|
| 976 |
|
|
.name = "UDPv6",
|
| 977 |
|
|
.owner = THIS_MODULE,
|
| 978 |
|
|
.close = udp_lib_close,
|
| 979 |
|
|
.connect = ip6_datagram_connect,
|
| 980 |
|
|
.disconnect = udp_disconnect,
|
| 981 |
|
|
.ioctl = udp_ioctl,
|
| 982 |
|
|
.destroy = udpv6_destroy_sock,
|
| 983 |
|
|
.setsockopt = udpv6_setsockopt,
|
| 984 |
|
|
.getsockopt = udpv6_getsockopt,
|
| 985 |
|
|
.sendmsg = udpv6_sendmsg,
|
| 986 |
|
|
.recvmsg = udpv6_recvmsg,
|
| 987 |
|
|
.backlog_rcv = udpv6_queue_rcv_skb,
|
| 988 |
|
|
.hash = udp_lib_hash,
|
| 989 |
|
|
.unhash = udp_lib_unhash,
|
| 990 |
|
|
.get_port = udp_v6_get_port,
|
| 991 |
|
|
.obj_size = sizeof(struct udp6_sock),
|
| 992 |
|
|
#ifdef CONFIG_COMPAT
|
| 993 |
|
|
.compat_setsockopt = compat_udpv6_setsockopt,
|
| 994 |
|
|
.compat_getsockopt = compat_udpv6_getsockopt,
|
| 995 |
|
|
#endif
|
| 996 |
|
|
REF_PROTO_INUSE(udpv6)
|
| 997 |
|
|
};
|
| 998 |
|
|
|
| 999 |
|
|
static struct inet_protosw udpv6_protosw = {
|
| 1000 |
|
|
.type = SOCK_DGRAM,
|
| 1001 |
|
|
.protocol = IPPROTO_UDP,
|
| 1002 |
|
|
.prot = &udpv6_prot,
|
| 1003 |
|
|
.ops = &inet6_dgram_ops,
|
| 1004 |
|
|
.capability =-1,
|
| 1005 |
|
|
.no_check = UDP_CSUM_DEFAULT,
|
| 1006 |
|
|
.flags = INET_PROTOSW_PERMANENT,
|
| 1007 |
|
|
};
|
| 1008 |
|
|
|
| 1009 |
|
|
|
| 1010 |
|
|
void __init udpv6_init(void)
|
| 1011 |
|
|
{
|
| 1012 |
|
|
if (inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP) < 0)
|
| 1013 |
|
|
printk(KERN_ERR "udpv6_init: Could not register protocol\n");
|
| 1014 |
|
|
inet6_register_protosw(&udpv6_protosw);
|
| 1015 |
|
|
}
|
