| 1 |
1275 |
phoenix |
/*
|
| 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 1.1.1.1 2004-04-15 01:14:35 phoenix Exp $
|
| 11 |
|
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*
|
| 12 |
|
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* Fixes:
|
| 13 |
|
|
* 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 |
|
|
* a single port at the same time.
|
| 17 |
|
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*
|
| 18 |
|
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* This program is free software; you can redistribute it and/or
|
| 19 |
|
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* modify it under the terms of the GNU General Public License
|
| 20 |
|
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* as published by the Free Software Foundation; either version
|
| 21 |
|
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* 2 of the License, or (at your option) any later version.
|
| 22 |
|
|
*/
|
| 23 |
|
|
|
| 24 |
|
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#include <linux/config.h>
|
| 25 |
|
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#include <linux/errno.h>
|
| 26 |
|
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#include <linux/types.h>
|
| 27 |
|
|
#include <linux/socket.h>
|
| 28 |
|
|
#include <linux/sockios.h>
|
| 29 |
|
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#include <linux/sched.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 |
|
|
#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 |
|
|
#include <asm/uaccess.h>
|
| 38 |
|
|
|
| 39 |
|
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#include <net/sock.h>
|
| 40 |
|
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#include <net/snmp.h>
|
| 41 |
|
|
|
| 42 |
|
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#include <net/ipv6.h>
|
| 43 |
|
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#include <net/ndisc.h>
|
| 44 |
|
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#include <net/protocol.h>
|
| 45 |
|
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#include <net/transp_v6.h>
|
| 46 |
|
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#include <net/ip6_route.h>
|
| 47 |
|
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#include <net/addrconf.h>
|
| 48 |
|
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#include <net/ip.h>
|
| 49 |
|
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#include <net/udp.h>
|
| 50 |
|
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#include <net/inet_common.h>
|
| 51 |
|
|
|
| 52 |
|
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#include <net/checksum.h>
|
| 53 |
|
|
|
| 54 |
|
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struct udp_mib udp_stats_in6[NR_CPUS*2];
|
| 55 |
|
|
|
| 56 |
|
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/* Grrr, addr_type already calculated by caller, but I don't want
|
| 57 |
|
|
* to add some silly "cookie" argument to this method just for that.
|
| 58 |
|
|
*/
|
| 59 |
|
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static int udp_v6_get_port(struct sock *sk, unsigned short snum)
|
| 60 |
|
|
{
|
| 61 |
|
|
write_lock_bh(&udp_hash_lock);
|
| 62 |
|
|
if (snum == 0) {
|
| 63 |
|
|
int best_size_so_far, best, result, i;
|
| 64 |
|
|
|
| 65 |
|
|
if (udp_port_rover > sysctl_local_port_range[1] ||
|
| 66 |
|
|
udp_port_rover < sysctl_local_port_range[0])
|
| 67 |
|
|
udp_port_rover = sysctl_local_port_range[0];
|
| 68 |
|
|
best_size_so_far = 32767;
|
| 69 |
|
|
best = result = udp_port_rover;
|
| 70 |
|
|
for (i = 0; i < UDP_HTABLE_SIZE; i++, result++) {
|
| 71 |
|
|
struct sock *sk;
|
| 72 |
|
|
int size;
|
| 73 |
|
|
|
| 74 |
|
|
sk = udp_hash[result & (UDP_HTABLE_SIZE - 1)];
|
| 75 |
|
|
if (!sk) {
|
| 76 |
|
|
if (result > sysctl_local_port_range[1])
|
| 77 |
|
|
result = sysctl_local_port_range[0] +
|
| 78 |
|
|
((result - sysctl_local_port_range[0]) &
|
| 79 |
|
|
(UDP_HTABLE_SIZE - 1));
|
| 80 |
|
|
goto gotit;
|
| 81 |
|
|
}
|
| 82 |
|
|
size = 0;
|
| 83 |
|
|
do {
|
| 84 |
|
|
if (++size >= best_size_so_far)
|
| 85 |
|
|
goto next;
|
| 86 |
|
|
} while ((sk = sk->next) != NULL);
|
| 87 |
|
|
best_size_so_far = size;
|
| 88 |
|
|
best = result;
|
| 89 |
|
|
next:;
|
| 90 |
|
|
}
|
| 91 |
|
|
result = best;
|
| 92 |
|
|
for(;; result += UDP_HTABLE_SIZE) {
|
| 93 |
|
|
if (result > sysctl_local_port_range[1])
|
| 94 |
|
|
result = sysctl_local_port_range[0]
|
| 95 |
|
|
+ ((result - sysctl_local_port_range[0]) &
|
| 96 |
|
|
(UDP_HTABLE_SIZE - 1));
|
| 97 |
|
|
if (!udp_lport_inuse(result))
|
| 98 |
|
|
break;
|
| 99 |
|
|
}
|
| 100 |
|
|
gotit:
|
| 101 |
|
|
udp_port_rover = snum = result;
|
| 102 |
|
|
} else {
|
| 103 |
|
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struct sock *sk2;
|
| 104 |
|
|
int addr_type = ipv6_addr_type(&sk->net_pinfo.af_inet6.rcv_saddr);
|
| 105 |
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|
|
| 106 |
|
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for (sk2 = udp_hash[snum & (UDP_HTABLE_SIZE - 1)];
|
| 107 |
|
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sk2 != NULL;
|
| 108 |
|
|
sk2 = sk2->next) {
|
| 109 |
|
|
if (sk2->num == snum &&
|
| 110 |
|
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sk2 != sk &&
|
| 111 |
|
|
(!sk2->bound_dev_if ||
|
| 112 |
|
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!sk->bound_dev_if ||
|
| 113 |
|
|
sk2->bound_dev_if == sk->bound_dev_if) &&
|
| 114 |
|
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((!sk2->rcv_saddr && !ipv6_only_sock(sk)) ||
|
| 115 |
|
|
(sk2->family == AF_INET6 &&
|
| 116 |
|
|
ipv6_addr_any(&sk2->net_pinfo.af_inet6.rcv_saddr) &&
|
| 117 |
|
|
!(ipv6_only_sock(sk2) && addr_type == IPV6_ADDR_MAPPED)) ||
|
| 118 |
|
|
(addr_type == IPV6_ADDR_ANY &&
|
| 119 |
|
|
(!ipv6_only_sock(sk) ||
|
| 120 |
|
|
!(sk2->family == AF_INET6 ? (ipv6_addr_type(&sk2->net_pinfo.af_inet6.rcv_saddr) == IPV6_ADDR_MAPPED) : 1))) ||
|
| 121 |
|
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(sk2->family == AF_INET6 &&
|
| 122 |
|
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!ipv6_addr_cmp(&sk->net_pinfo.af_inet6.rcv_saddr,
|
| 123 |
|
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&sk2->net_pinfo.af_inet6.rcv_saddr)) ||
|
| 124 |
|
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(addr_type == IPV6_ADDR_MAPPED &&
|
| 125 |
|
|
!ipv6_only_sock(sk2) &&
|
| 126 |
|
|
(!sk2->rcv_saddr ||
|
| 127 |
|
|
!sk->rcv_saddr ||
|
| 128 |
|
|
sk->rcv_saddr == sk2->rcv_saddr))) &&
|
| 129 |
|
|
(!sk2->reuse || !sk->reuse))
|
| 130 |
|
|
goto fail;
|
| 131 |
|
|
}
|
| 132 |
|
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}
|
| 133 |
|
|
|
| 134 |
|
|
sk->num = snum;
|
| 135 |
|
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if (sk->pprev == NULL) {
|
| 136 |
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struct sock **skp = &udp_hash[snum & (UDP_HTABLE_SIZE - 1)];
|
| 137 |
|
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if ((sk->next = *skp) != NULL)
|
| 138 |
|
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(*skp)->pprev = &sk->next;
|
| 139 |
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*skp = sk;
|
| 140 |
|
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sk->pprev = skp;
|
| 141 |
|
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sock_prot_inc_use(sk->prot);
|
| 142 |
|
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sock_hold(sk);
|
| 143 |
|
|
}
|
| 144 |
|
|
write_unlock_bh(&udp_hash_lock);
|
| 145 |
|
|
return 0;
|
| 146 |
|
|
|
| 147 |
|
|
fail:
|
| 148 |
|
|
write_unlock_bh(&udp_hash_lock);
|
| 149 |
|
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return 1;
|
| 150 |
|
|
}
|
| 151 |
|
|
|
| 152 |
|
|
static void udp_v6_hash(struct sock *sk)
|
| 153 |
|
|
{
|
| 154 |
|
|
BUG();
|
| 155 |
|
|
}
|
| 156 |
|
|
|
| 157 |
|
|
static void udp_v6_unhash(struct sock *sk)
|
| 158 |
|
|
{
|
| 159 |
|
|
write_lock_bh(&udp_hash_lock);
|
| 160 |
|
|
if (sk->pprev) {
|
| 161 |
|
|
if (sk->next)
|
| 162 |
|
|
sk->next->pprev = sk->pprev;
|
| 163 |
|
|
*sk->pprev = sk->next;
|
| 164 |
|
|
sk->pprev = NULL;
|
| 165 |
|
|
sk->num = 0;
|
| 166 |
|
|
sock_prot_dec_use(sk->prot);
|
| 167 |
|
|
__sock_put(sk);
|
| 168 |
|
|
}
|
| 169 |
|
|
write_unlock_bh(&udp_hash_lock);
|
| 170 |
|
|
}
|
| 171 |
|
|
|
| 172 |
|
|
static struct sock *udp_v6_lookup(struct in6_addr *saddr, u16 sport,
|
| 173 |
|
|
struct in6_addr *daddr, u16 dport, int dif)
|
| 174 |
|
|
{
|
| 175 |
|
|
struct sock *sk, *result = NULL;
|
| 176 |
|
|
unsigned short hnum = ntohs(dport);
|
| 177 |
|
|
int badness = -1;
|
| 178 |
|
|
|
| 179 |
|
|
read_lock(&udp_hash_lock);
|
| 180 |
|
|
for(sk = udp_hash[hnum & (UDP_HTABLE_SIZE - 1)]; sk != NULL; sk = sk->next) {
|
| 181 |
|
|
if((sk->num == hnum) &&
|
| 182 |
|
|
(sk->family == PF_INET6)) {
|
| 183 |
|
|
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
|
| 184 |
|
|
int score = 0;
|
| 185 |
|
|
if(sk->dport) {
|
| 186 |
|
|
if(sk->dport != sport)
|
| 187 |
|
|
continue;
|
| 188 |
|
|
score++;
|
| 189 |
|
|
}
|
| 190 |
|
|
if(!ipv6_addr_any(&np->rcv_saddr)) {
|
| 191 |
|
|
if(ipv6_addr_cmp(&np->rcv_saddr, daddr))
|
| 192 |
|
|
continue;
|
| 193 |
|
|
score++;
|
| 194 |
|
|
}
|
| 195 |
|
|
if(!ipv6_addr_any(&np->daddr)) {
|
| 196 |
|
|
if(ipv6_addr_cmp(&np->daddr, saddr))
|
| 197 |
|
|
continue;
|
| 198 |
|
|
score++;
|
| 199 |
|
|
}
|
| 200 |
|
|
if(sk->bound_dev_if) {
|
| 201 |
|
|
if(sk->bound_dev_if != dif)
|
| 202 |
|
|
continue;
|
| 203 |
|
|
score++;
|
| 204 |
|
|
}
|
| 205 |
|
|
if(score == 4) {
|
| 206 |
|
|
result = sk;
|
| 207 |
|
|
break;
|
| 208 |
|
|
} else if(score > badness) {
|
| 209 |
|
|
result = sk;
|
| 210 |
|
|
badness = score;
|
| 211 |
|
|
}
|
| 212 |
|
|
}
|
| 213 |
|
|
}
|
| 214 |
|
|
if (result)
|
| 215 |
|
|
sock_hold(result);
|
| 216 |
|
|
read_unlock(&udp_hash_lock);
|
| 217 |
|
|
return result;
|
| 218 |
|
|
}
|
| 219 |
|
|
|
| 220 |
|
|
/*
|
| 221 |
|
|
*
|
| 222 |
|
|
*/
|
| 223 |
|
|
|
| 224 |
|
|
int udpv6_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
|
| 225 |
|
|
{
|
| 226 |
|
|
struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr;
|
| 227 |
|
|
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
|
| 228 |
|
|
struct in6_addr *daddr;
|
| 229 |
|
|
struct in6_addr saddr;
|
| 230 |
|
|
struct dst_entry *dst;
|
| 231 |
|
|
struct flowi fl;
|
| 232 |
|
|
struct ip6_flowlabel *flowlabel = NULL;
|
| 233 |
|
|
int addr_type;
|
| 234 |
|
|
int err;
|
| 235 |
|
|
|
| 236 |
|
|
if (usin->sin6_family == AF_INET) {
|
| 237 |
|
|
if (__ipv6_only_sock(sk))
|
| 238 |
|
|
return -EAFNOSUPPORT;
|
| 239 |
|
|
err = udp_connect(sk, uaddr, addr_len);
|
| 240 |
|
|
goto ipv4_connected;
|
| 241 |
|
|
}
|
| 242 |
|
|
|
| 243 |
|
|
if (addr_len < SIN6_LEN_RFC2133)
|
| 244 |
|
|
return -EINVAL;
|
| 245 |
|
|
|
| 246 |
|
|
if (usin->sin6_family != AF_INET6)
|
| 247 |
|
|
return -EAFNOSUPPORT;
|
| 248 |
|
|
|
| 249 |
|
|
fl.fl6_flowlabel = 0;
|
| 250 |
|
|
if (np->sndflow) {
|
| 251 |
|
|
fl.fl6_flowlabel = usin->sin6_flowinfo&IPV6_FLOWINFO_MASK;
|
| 252 |
|
|
if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
|
| 253 |
|
|
flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
|
| 254 |
|
|
if (flowlabel == NULL)
|
| 255 |
|
|
return -EINVAL;
|
| 256 |
|
|
ipv6_addr_copy(&usin->sin6_addr, &flowlabel->dst);
|
| 257 |
|
|
}
|
| 258 |
|
|
}
|
| 259 |
|
|
|
| 260 |
|
|
addr_type = ipv6_addr_type(&usin->sin6_addr);
|
| 261 |
|
|
|
| 262 |
|
|
if (addr_type == IPV6_ADDR_ANY) {
|
| 263 |
|
|
/*
|
| 264 |
|
|
* connect to self
|
| 265 |
|
|
*/
|
| 266 |
|
|
usin->sin6_addr.s6_addr[15] = 0x01;
|
| 267 |
|
|
}
|
| 268 |
|
|
|
| 269 |
|
|
daddr = &usin->sin6_addr;
|
| 270 |
|
|
|
| 271 |
|
|
if (addr_type == IPV6_ADDR_MAPPED) {
|
| 272 |
|
|
struct sockaddr_in sin;
|
| 273 |
|
|
|
| 274 |
|
|
if (__ipv6_only_sock(sk))
|
| 275 |
|
|
return -ENETUNREACH;
|
| 276 |
|
|
|
| 277 |
|
|
sin.sin_family = AF_INET;
|
| 278 |
|
|
sin.sin_addr.s_addr = daddr->s6_addr32[3];
|
| 279 |
|
|
sin.sin_port = usin->sin6_port;
|
| 280 |
|
|
|
| 281 |
|
|
err = udp_connect(sk, (struct sockaddr*) &sin, sizeof(sin));
|
| 282 |
|
|
|
| 283 |
|
|
ipv4_connected:
|
| 284 |
|
|
if (err < 0)
|
| 285 |
|
|
return err;
|
| 286 |
|
|
|
| 287 |
|
|
ipv6_addr_set(&np->daddr, 0, 0,
|
| 288 |
|
|
htonl(0x0000ffff),
|
| 289 |
|
|
sk->daddr);
|
| 290 |
|
|
|
| 291 |
|
|
if(ipv6_addr_any(&np->saddr)) {
|
| 292 |
|
|
ipv6_addr_set(&np->saddr, 0, 0,
|
| 293 |
|
|
htonl(0x0000ffff),
|
| 294 |
|
|
sk->saddr);
|
| 295 |
|
|
}
|
| 296 |
|
|
|
| 297 |
|
|
if(ipv6_addr_any(&np->rcv_saddr)) {
|
| 298 |
|
|
ipv6_addr_set(&np->rcv_saddr, 0, 0,
|
| 299 |
|
|
htonl(0x0000ffff),
|
| 300 |
|
|
sk->rcv_saddr);
|
| 301 |
|
|
}
|
| 302 |
|
|
return 0;
|
| 303 |
|
|
}
|
| 304 |
|
|
|
| 305 |
|
|
if (addr_type&IPV6_ADDR_LINKLOCAL) {
|
| 306 |
|
|
if (addr_len >= sizeof(struct sockaddr_in6) &&
|
| 307 |
|
|
usin->sin6_scope_id) {
|
| 308 |
|
|
if (sk->bound_dev_if && sk->bound_dev_if != usin->sin6_scope_id) {
|
| 309 |
|
|
fl6_sock_release(flowlabel);
|
| 310 |
|
|
return -EINVAL;
|
| 311 |
|
|
}
|
| 312 |
|
|
sk->bound_dev_if = usin->sin6_scope_id;
|
| 313 |
|
|
if (!sk->bound_dev_if && (addr_type&IPV6_ADDR_MULTICAST))
|
| 314 |
|
|
fl.oif = np->mcast_oif;
|
| 315 |
|
|
}
|
| 316 |
|
|
|
| 317 |
|
|
/* Connect to link-local address requires an interface */
|
| 318 |
|
|
if (sk->bound_dev_if == 0)
|
| 319 |
|
|
return -EINVAL;
|
| 320 |
|
|
}
|
| 321 |
|
|
|
| 322 |
|
|
ipv6_addr_copy(&np->daddr, daddr);
|
| 323 |
|
|
np->flow_label = fl.fl6_flowlabel;
|
| 324 |
|
|
|
| 325 |
|
|
sk->dport = usin->sin6_port;
|
| 326 |
|
|
|
| 327 |
|
|
/*
|
| 328 |
|
|
* Check for a route to destination an obtain the
|
| 329 |
|
|
* destination cache for it.
|
| 330 |
|
|
*/
|
| 331 |
|
|
|
| 332 |
|
|
fl.proto = IPPROTO_UDP;
|
| 333 |
|
|
fl.fl6_dst = &np->daddr;
|
| 334 |
|
|
fl.fl6_src = &saddr;
|
| 335 |
|
|
fl.oif = sk->bound_dev_if;
|
| 336 |
|
|
fl.uli_u.ports.dport = sk->dport;
|
| 337 |
|
|
fl.uli_u.ports.sport = sk->sport;
|
| 338 |
|
|
|
| 339 |
|
|
if (!fl.oif && (addr_type&IPV6_ADDR_MULTICAST))
|
| 340 |
|
|
fl.oif = np->mcast_oif;
|
| 341 |
|
|
|
| 342 |
|
|
if (flowlabel) {
|
| 343 |
|
|
if (flowlabel->opt && flowlabel->opt->srcrt) {
|
| 344 |
|
|
struct rt0_hdr *rt0 = (struct rt0_hdr *) flowlabel->opt->srcrt;
|
| 345 |
|
|
fl.fl6_dst = rt0->addr;
|
| 346 |
|
|
}
|
| 347 |
|
|
} else if (np->opt && np->opt->srcrt) {
|
| 348 |
|
|
struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
|
| 349 |
|
|
fl.fl6_dst = rt0->addr;
|
| 350 |
|
|
}
|
| 351 |
|
|
|
| 352 |
|
|
dst = ip6_route_output(sk, &fl);
|
| 353 |
|
|
|
| 354 |
|
|
if ((err = dst->error) != 0) {
|
| 355 |
|
|
dst_release(dst);
|
| 356 |
|
|
fl6_sock_release(flowlabel);
|
| 357 |
|
|
return err;
|
| 358 |
|
|
}
|
| 359 |
|
|
|
| 360 |
|
|
ip6_dst_store(sk, dst, fl.fl6_dst);
|
| 361 |
|
|
|
| 362 |
|
|
/* get the source adddress used in the apropriate device */
|
| 363 |
|
|
|
| 364 |
|
|
err = ipv6_get_saddr(dst, daddr, &saddr);
|
| 365 |
|
|
|
| 366 |
|
|
if (err == 0) {
|
| 367 |
|
|
if(ipv6_addr_any(&np->saddr))
|
| 368 |
|
|
ipv6_addr_copy(&np->saddr, &saddr);
|
| 369 |
|
|
|
| 370 |
|
|
if(ipv6_addr_any(&np->rcv_saddr)) {
|
| 371 |
|
|
ipv6_addr_copy(&np->rcv_saddr, &saddr);
|
| 372 |
|
|
sk->rcv_saddr = LOOPBACK4_IPV6;
|
| 373 |
|
|
}
|
| 374 |
|
|
sk->state = TCP_ESTABLISHED;
|
| 375 |
|
|
}
|
| 376 |
|
|
fl6_sock_release(flowlabel);
|
| 377 |
|
|
|
| 378 |
|
|
return err;
|
| 379 |
|
|
}
|
| 380 |
|
|
|
| 381 |
|
|
static void udpv6_close(struct sock *sk, long timeout)
|
| 382 |
|
|
{
|
| 383 |
|
|
inet_sock_release(sk);
|
| 384 |
|
|
}
|
| 385 |
|
|
|
| 386 |
|
|
/*
|
| 387 |
|
|
* This should be easy, if there is something there we
|
| 388 |
|
|
* return it, otherwise we block.
|
| 389 |
|
|
*/
|
| 390 |
|
|
|
| 391 |
|
|
int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, int len,
|
| 392 |
|
|
int noblock, int flags, int *addr_len)
|
| 393 |
|
|
{
|
| 394 |
|
|
struct sk_buff *skb;
|
| 395 |
|
|
int copied, err;
|
| 396 |
|
|
|
| 397 |
|
|
if (addr_len)
|
| 398 |
|
|
*addr_len=sizeof(struct sockaddr_in6);
|
| 399 |
|
|
|
| 400 |
|
|
if (flags & MSG_ERRQUEUE)
|
| 401 |
|
|
return ipv6_recv_error(sk, msg, len);
|
| 402 |
|
|
|
| 403 |
|
|
try_again:
|
| 404 |
|
|
skb = skb_recv_datagram(sk, flags, noblock, &err);
|
| 405 |
|
|
if (!skb)
|
| 406 |
|
|
goto out;
|
| 407 |
|
|
|
| 408 |
|
|
copied = skb->len - sizeof(struct udphdr);
|
| 409 |
|
|
if (copied > len) {
|
| 410 |
|
|
copied = len;
|
| 411 |
|
|
msg->msg_flags |= MSG_TRUNC;
|
| 412 |
|
|
}
|
| 413 |
|
|
|
| 414 |
|
|
if (skb->ip_summed==CHECKSUM_UNNECESSARY) {
|
| 415 |
|
|
err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov,
|
| 416 |
|
|
copied);
|
| 417 |
|
|
} else if (msg->msg_flags&MSG_TRUNC) {
|
| 418 |
|
|
if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum)))
|
| 419 |
|
|
goto csum_copy_err;
|
| 420 |
|
|
err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov,
|
| 421 |
|
|
copied);
|
| 422 |
|
|
} else {
|
| 423 |
|
|
err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov);
|
| 424 |
|
|
if (err == -EINVAL)
|
| 425 |
|
|
goto csum_copy_err;
|
| 426 |
|
|
}
|
| 427 |
|
|
if (err)
|
| 428 |
|
|
goto out_free;
|
| 429 |
|
|
|
| 430 |
|
|
sock_recv_timestamp(msg, sk, skb);
|
| 431 |
|
|
|
| 432 |
|
|
/* Copy the address. */
|
| 433 |
|
|
if (msg->msg_name) {
|
| 434 |
|
|
struct sockaddr_in6 *sin6;
|
| 435 |
|
|
|
| 436 |
|
|
sin6 = (struct sockaddr_in6 *) msg->msg_name;
|
| 437 |
|
|
sin6->sin6_family = AF_INET6;
|
| 438 |
|
|
sin6->sin6_port = skb->h.uh->source;
|
| 439 |
|
|
sin6->sin6_flowinfo = 0;
|
| 440 |
|
|
sin6->sin6_scope_id = 0;
|
| 441 |
|
|
|
| 442 |
|
|
if (skb->protocol == htons(ETH_P_IP)) {
|
| 443 |
|
|
ipv6_addr_set(&sin6->sin6_addr, 0, 0,
|
| 444 |
|
|
htonl(0xffff), skb->nh.iph->saddr);
|
| 445 |
|
|
if (sk->protinfo.af_inet.cmsg_flags)
|
| 446 |
|
|
ip_cmsg_recv(msg, skb);
|
| 447 |
|
|
} else {
|
| 448 |
|
|
memcpy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr,
|
| 449 |
|
|
sizeof(struct in6_addr));
|
| 450 |
|
|
|
| 451 |
|
|
if (sk->net_pinfo.af_inet6.rxopt.all)
|
| 452 |
|
|
datagram_recv_ctl(sk, msg, skb);
|
| 453 |
|
|
if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) {
|
| 454 |
|
|
struct inet6_skb_parm *opt = (struct inet6_skb_parm *) skb->cb;
|
| 455 |
|
|
sin6->sin6_scope_id = opt->iif;
|
| 456 |
|
|
}
|
| 457 |
|
|
}
|
| 458 |
|
|
}
|
| 459 |
|
|
err = copied;
|
| 460 |
|
|
|
| 461 |
|
|
out_free:
|
| 462 |
|
|
skb_free_datagram(sk, skb);
|
| 463 |
|
|
out:
|
| 464 |
|
|
return err;
|
| 465 |
|
|
|
| 466 |
|
|
csum_copy_err:
|
| 467 |
|
|
/* Clear queue. */
|
| 468 |
|
|
if (flags&MSG_PEEK) {
|
| 469 |
|
|
int clear = 0;
|
| 470 |
|
|
spin_lock_irq(&sk->receive_queue.lock);
|
| 471 |
|
|
if (skb == skb_peek(&sk->receive_queue)) {
|
| 472 |
|
|
__skb_unlink(skb, &sk->receive_queue);
|
| 473 |
|
|
clear = 1;
|
| 474 |
|
|
}
|
| 475 |
|
|
spin_unlock_irq(&sk->receive_queue.lock);
|
| 476 |
|
|
if (clear)
|
| 477 |
|
|
kfree_skb(skb);
|
| 478 |
|
|
}
|
| 479 |
|
|
|
| 480 |
|
|
skb_free_datagram(sk, skb);
|
| 481 |
|
|
|
| 482 |
|
|
if (flags & MSG_DONTWAIT) {
|
| 483 |
|
|
UDP6_INC_STATS_USER(UdpInErrors);
|
| 484 |
|
|
return -EAGAIN;
|
| 485 |
|
|
}
|
| 486 |
|
|
goto try_again;
|
| 487 |
|
|
}
|
| 488 |
|
|
|
| 489 |
|
|
void udpv6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
|
| 490 |
|
|
int type, int code, int offset, __u32 info)
|
| 491 |
|
|
{
|
| 492 |
|
|
struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
|
| 493 |
|
|
struct net_device *dev = skb->dev;
|
| 494 |
|
|
struct in6_addr *saddr = &hdr->saddr;
|
| 495 |
|
|
struct in6_addr *daddr = &hdr->daddr;
|
| 496 |
|
|
struct udphdr *uh = (struct udphdr*)(skb->data+offset);
|
| 497 |
|
|
struct sock *sk;
|
| 498 |
|
|
int err;
|
| 499 |
|
|
|
| 500 |
|
|
sk = udp_v6_lookup(daddr, uh->dest, saddr, uh->source, dev->ifindex);
|
| 501 |
|
|
|
| 502 |
|
|
if (sk == NULL)
|
| 503 |
|
|
return;
|
| 504 |
|
|
|
| 505 |
|
|
if (!icmpv6_err_convert(type, code, &err) &&
|
| 506 |
|
|
!sk->net_pinfo.af_inet6.recverr)
|
| 507 |
|
|
goto out;
|
| 508 |
|
|
|
| 509 |
|
|
if (sk->state!=TCP_ESTABLISHED &&
|
| 510 |
|
|
!sk->net_pinfo.af_inet6.recverr)
|
| 511 |
|
|
goto out;
|
| 512 |
|
|
|
| 513 |
|
|
if (sk->net_pinfo.af_inet6.recverr)
|
| 514 |
|
|
ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1));
|
| 515 |
|
|
|
| 516 |
|
|
sk->err = err;
|
| 517 |
|
|
sk->error_report(sk);
|
| 518 |
|
|
out:
|
| 519 |
|
|
sock_put(sk);
|
| 520 |
|
|
}
|
| 521 |
|
|
|
| 522 |
|
|
static inline int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
|
| 523 |
|
|
{
|
| 524 |
|
|
#if defined(CONFIG_FILTER)
|
| 525 |
|
|
if (sk->filter && skb->ip_summed != CHECKSUM_UNNECESSARY) {
|
| 526 |
|
|
if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) {
|
| 527 |
|
|
UDP6_INC_STATS_BH(UdpInErrors);
|
| 528 |
|
|
IP6_INC_STATS_BH(Ip6InDiscards);
|
| 529 |
|
|
kfree_skb(skb);
|
| 530 |
|
|
return 0;
|
| 531 |
|
|
}
|
| 532 |
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
| 533 |
|
|
}
|
| 534 |
|
|
#endif
|
| 535 |
|
|
if (sock_queue_rcv_skb(sk,skb)<0) {
|
| 536 |
|
|
UDP6_INC_STATS_BH(UdpInErrors);
|
| 537 |
|
|
IP6_INC_STATS_BH(Ip6InDiscards);
|
| 538 |
|
|
kfree_skb(skb);
|
| 539 |
|
|
return 0;
|
| 540 |
|
|
}
|
| 541 |
|
|
IP6_INC_STATS_BH(Ip6InDelivers);
|
| 542 |
|
|
UDP6_INC_STATS_BH(UdpInDatagrams);
|
| 543 |
|
|
return 0;
|
| 544 |
|
|
}
|
| 545 |
|
|
|
| 546 |
|
|
static struct sock *udp_v6_mcast_next(struct sock *sk,
|
| 547 |
|
|
u16 loc_port, struct in6_addr *loc_addr,
|
| 548 |
|
|
u16 rmt_port, struct in6_addr *rmt_addr,
|
| 549 |
|
|
int dif)
|
| 550 |
|
|
{
|
| 551 |
|
|
struct sock *s = sk;
|
| 552 |
|
|
unsigned short num = ntohs(loc_port);
|
| 553 |
|
|
for(; s; s = s->next) {
|
| 554 |
|
|
if(s->num == num) {
|
| 555 |
|
|
struct ipv6_pinfo *np = &s->net_pinfo.af_inet6;
|
| 556 |
|
|
if(s->dport) {
|
| 557 |
|
|
if(s->dport != rmt_port)
|
| 558 |
|
|
continue;
|
| 559 |
|
|
}
|
| 560 |
|
|
if(!ipv6_addr_any(&np->daddr) &&
|
| 561 |
|
|
ipv6_addr_cmp(&np->daddr, rmt_addr))
|
| 562 |
|
|
continue;
|
| 563 |
|
|
|
| 564 |
|
|
if (s->bound_dev_if && s->bound_dev_if != dif)
|
| 565 |
|
|
continue;
|
| 566 |
|
|
|
| 567 |
|
|
if(!ipv6_addr_any(&np->rcv_saddr)) {
|
| 568 |
|
|
if(ipv6_addr_cmp(&np->rcv_saddr, loc_addr) == 0)
|
| 569 |
|
|
return s;
|
| 570 |
|
|
continue;
|
| 571 |
|
|
}
|
| 572 |
|
|
if(!inet6_mc_check(s, loc_addr, rmt_addr))
|
| 573 |
|
|
continue;
|
| 574 |
|
|
return s;
|
| 575 |
|
|
}
|
| 576 |
|
|
}
|
| 577 |
|
|
return NULL;
|
| 578 |
|
|
}
|
| 579 |
|
|
|
| 580 |
|
|
/*
|
| 581 |
|
|
* Note: called only from the BH handler context,
|
| 582 |
|
|
* so we don't need to lock the hashes.
|
| 583 |
|
|
*/
|
| 584 |
|
|
static void udpv6_mcast_deliver(struct udphdr *uh,
|
| 585 |
|
|
struct in6_addr *saddr, struct in6_addr *daddr,
|
| 586 |
|
|
struct sk_buff *skb)
|
| 587 |
|
|
{
|
| 588 |
|
|
struct sock *sk, *sk2;
|
| 589 |
|
|
struct sk_buff *buff;
|
| 590 |
|
|
int dif;
|
| 591 |
|
|
|
| 592 |
|
|
read_lock(&udp_hash_lock);
|
| 593 |
|
|
sk = udp_hash[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)];
|
| 594 |
|
|
dif = skb->dev->ifindex;
|
| 595 |
|
|
sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif);
|
| 596 |
|
|
if (!sk)
|
| 597 |
|
|
goto free_skb;
|
| 598 |
|
|
|
| 599 |
|
|
buff = NULL;
|
| 600 |
|
|
sk2 = sk;
|
| 601 |
|
|
while((sk2 = udp_v6_mcast_next(sk2->next, uh->dest, daddr,
|
| 602 |
|
|
uh->source, saddr, dif))) {
|
| 603 |
|
|
if (!buff) {
|
| 604 |
|
|
buff = skb_clone(skb, GFP_ATOMIC);
|
| 605 |
|
|
if (!buff)
|
| 606 |
|
|
continue;
|
| 607 |
|
|
}
|
| 608 |
|
|
if (sock_queue_rcv_skb(sk2, buff) >= 0)
|
| 609 |
|
|
buff = NULL;
|
| 610 |
|
|
}
|
| 611 |
|
|
if (buff)
|
| 612 |
|
|
kfree_skb(buff);
|
| 613 |
|
|
if (sock_queue_rcv_skb(sk, skb) < 0) {
|
| 614 |
|
|
free_skb:
|
| 615 |
|
|
kfree_skb(skb);
|
| 616 |
|
|
}
|
| 617 |
|
|
read_unlock(&udp_hash_lock);
|
| 618 |
|
|
}
|
| 619 |
|
|
|
| 620 |
|
|
int udpv6_rcv(struct sk_buff *skb)
|
| 621 |
|
|
{
|
| 622 |
|
|
struct sock *sk;
|
| 623 |
|
|
struct udphdr *uh;
|
| 624 |
|
|
struct net_device *dev = skb->dev;
|
| 625 |
|
|
struct in6_addr *saddr, *daddr;
|
| 626 |
|
|
u32 ulen = 0;
|
| 627 |
|
|
|
| 628 |
|
|
if (!pskb_may_pull(skb, sizeof(struct udphdr)))
|
| 629 |
|
|
goto short_packet;
|
| 630 |
|
|
|
| 631 |
|
|
saddr = &skb->nh.ipv6h->saddr;
|
| 632 |
|
|
daddr = &skb->nh.ipv6h->daddr;
|
| 633 |
|
|
uh = skb->h.uh;
|
| 634 |
|
|
|
| 635 |
|
|
ulen = ntohs(uh->len);
|
| 636 |
|
|
|
| 637 |
|
|
/* Check for jumbo payload */
|
| 638 |
|
|
if (ulen == 0)
|
| 639 |
|
|
ulen = skb->len;
|
| 640 |
|
|
|
| 641 |
|
|
if (ulen > skb->len || ulen < sizeof(*uh))
|
| 642 |
|
|
goto short_packet;
|
| 643 |
|
|
|
| 644 |
|
|
if (uh->check == 0) {
|
| 645 |
|
|
/* IPv6 draft-v2 section 8.1 says that we SHOULD log
|
| 646 |
|
|
this error. Well, it is reasonable.
|
| 647 |
|
|
*/
|
| 648 |
|
|
if (net_ratelimit())
|
| 649 |
|
|
printk(KERN_INFO "IPv6: udp checksum is 0\n");
|
| 650 |
|
|
goto discard;
|
| 651 |
|
|
}
|
| 652 |
|
|
|
| 653 |
|
|
if (ulen < skb->len) {
|
| 654 |
|
|
if (__pskb_trim(skb, ulen))
|
| 655 |
|
|
goto discard;
|
| 656 |
|
|
saddr = &skb->nh.ipv6h->saddr;
|
| 657 |
|
|
daddr = &skb->nh.ipv6h->daddr;
|
| 658 |
|
|
uh = skb->h.uh;
|
| 659 |
|
|
}
|
| 660 |
|
|
|
| 661 |
|
|
if (skb->ip_summed==CHECKSUM_HW) {
|
| 662 |
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
| 663 |
|
|
if (csum_ipv6_magic(saddr, daddr, ulen, IPPROTO_UDP, skb->csum)) {
|
| 664 |
|
|
NETDEBUG(if (net_ratelimit()) printk(KERN_DEBUG "udp v6 hw csum failure.\n"));
|
| 665 |
|
|
skb->ip_summed = CHECKSUM_NONE;
|
| 666 |
|
|
}
|
| 667 |
|
|
}
|
| 668 |
|
|
if (skb->ip_summed != CHECKSUM_UNNECESSARY)
|
| 669 |
|
|
skb->csum = ~csum_ipv6_magic(saddr, daddr, ulen, IPPROTO_UDP, 0);
|
| 670 |
|
|
|
| 671 |
|
|
/*
|
| 672 |
|
|
* Multicast receive code
|
| 673 |
|
|
*/
|
| 674 |
|
|
if (ipv6_addr_type(daddr) & IPV6_ADDR_MULTICAST) {
|
| 675 |
|
|
udpv6_mcast_deliver(uh, saddr, daddr, skb);
|
| 676 |
|
|
return 0;
|
| 677 |
|
|
}
|
| 678 |
|
|
|
| 679 |
|
|
/* Unicast */
|
| 680 |
|
|
|
| 681 |
|
|
/*
|
| 682 |
|
|
* check socket cache ... must talk to Alan about his plans
|
| 683 |
|
|
* for sock caches... i'll skip this for now.
|
| 684 |
|
|
*/
|
| 685 |
|
|
sk = udp_v6_lookup(saddr, uh->source, daddr, uh->dest, dev->ifindex);
|
| 686 |
|
|
|
| 687 |
|
|
if (sk == NULL) {
|
| 688 |
|
|
if (skb->ip_summed != CHECKSUM_UNNECESSARY &&
|
| 689 |
|
|
(unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum)))
|
| 690 |
|
|
goto discard;
|
| 691 |
|
|
UDP6_INC_STATS_BH(UdpNoPorts);
|
| 692 |
|
|
|
| 693 |
|
|
icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev);
|
| 694 |
|
|
|
| 695 |
|
|
kfree_skb(skb);
|
| 696 |
|
|
return(0);
|
| 697 |
|
|
}
|
| 698 |
|
|
|
| 699 |
|
|
/* deliver */
|
| 700 |
|
|
|
| 701 |
|
|
udpv6_queue_rcv_skb(sk, skb);
|
| 702 |
|
|
sock_put(sk);
|
| 703 |
|
|
return(0);
|
| 704 |
|
|
|
| 705 |
|
|
short_packet:
|
| 706 |
|
|
if (net_ratelimit())
|
| 707 |
|
|
printk(KERN_DEBUG "UDP: short packet: %d/%u\n", ulen, skb->len);
|
| 708 |
|
|
|
| 709 |
|
|
discard:
|
| 710 |
|
|
UDP6_INC_STATS_BH(UdpInErrors);
|
| 711 |
|
|
kfree_skb(skb);
|
| 712 |
|
|
return(0);
|
| 713 |
|
|
}
|
| 714 |
|
|
|
| 715 |
|
|
/*
|
| 716 |
|
|
* Sending
|
| 717 |
|
|
*/
|
| 718 |
|
|
|
| 719 |
|
|
struct udpv6fakehdr
|
| 720 |
|
|
{
|
| 721 |
|
|
struct udphdr uh;
|
| 722 |
|
|
struct iovec *iov;
|
| 723 |
|
|
__u32 wcheck;
|
| 724 |
|
|
__u32 pl_len;
|
| 725 |
|
|
struct in6_addr *daddr;
|
| 726 |
|
|
};
|
| 727 |
|
|
|
| 728 |
|
|
/*
|
| 729 |
|
|
* with checksum
|
| 730 |
|
|
*/
|
| 731 |
|
|
|
| 732 |
|
|
static int udpv6_getfrag(const void *data, struct in6_addr *addr,
|
| 733 |
|
|
char *buff, unsigned int offset, unsigned int len)
|
| 734 |
|
|
{
|
| 735 |
|
|
struct udpv6fakehdr *udh = (struct udpv6fakehdr *) data;
|
| 736 |
|
|
char *dst;
|
| 737 |
|
|
int final = 0;
|
| 738 |
|
|
int clen = len;
|
| 739 |
|
|
|
| 740 |
|
|
dst = buff;
|
| 741 |
|
|
|
| 742 |
|
|
if (offset) {
|
| 743 |
|
|
offset -= sizeof(struct udphdr);
|
| 744 |
|
|
} else {
|
| 745 |
|
|
dst += sizeof(struct udphdr);
|
| 746 |
|
|
final = 1;
|
| 747 |
|
|
clen -= sizeof(struct udphdr);
|
| 748 |
|
|
}
|
| 749 |
|
|
|
| 750 |
|
|
if (csum_partial_copy_fromiovecend(dst, udh->iov, offset,
|
| 751 |
|
|
clen, &udh->wcheck))
|
| 752 |
|
|
return -EFAULT;
|
| 753 |
|
|
|
| 754 |
|
|
if (final) {
|
| 755 |
|
|
struct in6_addr *daddr;
|
| 756 |
|
|
|
| 757 |
|
|
udh->wcheck = csum_partial((char *)udh, sizeof(struct udphdr),
|
| 758 |
|
|
udh->wcheck);
|
| 759 |
|
|
|
| 760 |
|
|
if (udh->daddr) {
|
| 761 |
|
|
daddr = udh->daddr;
|
| 762 |
|
|
} else {
|
| 763 |
|
|
/*
|
| 764 |
|
|
* use packet destination address
|
| 765 |
|
|
* this should improve cache locality
|
| 766 |
|
|
*/
|
| 767 |
|
|
daddr = addr + 1;
|
| 768 |
|
|
}
|
| 769 |
|
|
udh->uh.check = csum_ipv6_magic(addr, daddr,
|
| 770 |
|
|
udh->pl_len, IPPROTO_UDP,
|
| 771 |
|
|
udh->wcheck);
|
| 772 |
|
|
if (udh->uh.check == 0)
|
| 773 |
|
|
udh->uh.check = -1;
|
| 774 |
|
|
|
| 775 |
|
|
memcpy(buff, udh, sizeof(struct udphdr));
|
| 776 |
|
|
}
|
| 777 |
|
|
return 0;
|
| 778 |
|
|
}
|
| 779 |
|
|
|
| 780 |
|
|
static int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, int ulen)
|
| 781 |
|
|
{
|
| 782 |
|
|
struct ipv6_txoptions opt_space;
|
| 783 |
|
|
struct udpv6fakehdr udh;
|
| 784 |
|
|
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
|
| 785 |
|
|
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name;
|
| 786 |
|
|
struct ipv6_txoptions *opt = NULL;
|
| 787 |
|
|
struct ip6_flowlabel *flowlabel = NULL;
|
| 788 |
|
|
struct flowi fl;
|
| 789 |
|
|
int addr_len = msg->msg_namelen;
|
| 790 |
|
|
struct in6_addr *daddr;
|
| 791 |
|
|
int len = ulen + sizeof(struct udphdr);
|
| 792 |
|
|
int addr_type;
|
| 793 |
|
|
int hlimit = -1;
|
| 794 |
|
|
|
| 795 |
|
|
int err;
|
| 796 |
|
|
|
| 797 |
|
|
/* Rough check on arithmetic overflow,
|
| 798 |
|
|
better check is made in ip6_build_xmit
|
| 799 |
|
|
*/
|
| 800 |
|
|
if (ulen < 0 || ulen > INT_MAX - sizeof(struct udphdr))
|
| 801 |
|
|
return -EMSGSIZE;
|
| 802 |
|
|
|
| 803 |
|
|
fl.fl6_flowlabel = 0;
|
| 804 |
|
|
fl.oif = 0;
|
| 805 |
|
|
|
| 806 |
|
|
if (sin6) {
|
| 807 |
|
|
if (sin6->sin6_family == AF_INET) {
|
| 808 |
|
|
if (__ipv6_only_sock(sk))
|
| 809 |
|
|
return -ENETUNREACH;
|
| 810 |
|
|
return udp_sendmsg(sk, msg, ulen);
|
| 811 |
|
|
}
|
| 812 |
|
|
|
| 813 |
|
|
if (addr_len < SIN6_LEN_RFC2133)
|
| 814 |
|
|
return -EINVAL;
|
| 815 |
|
|
|
| 816 |
|
|
if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
|
| 817 |
|
|
return -EINVAL;
|
| 818 |
|
|
|
| 819 |
|
|
if (sin6->sin6_port == 0)
|
| 820 |
|
|
return -EINVAL;
|
| 821 |
|
|
|
| 822 |
|
|
udh.uh.dest = sin6->sin6_port;
|
| 823 |
|
|
daddr = &sin6->sin6_addr;
|
| 824 |
|
|
|
| 825 |
|
|
if (np->sndflow) {
|
| 826 |
|
|
fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
|
| 827 |
|
|
if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
|
| 828 |
|
|
flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
|
| 829 |
|
|
if (flowlabel == NULL)
|
| 830 |
|
|
return -EINVAL;
|
| 831 |
|
|
daddr = &flowlabel->dst;
|
| 832 |
|
|
}
|
| 833 |
|
|
}
|
| 834 |
|
|
|
| 835 |
|
|
/* Otherwise it will be difficult to maintain sk->dst_cache. */
|
| 836 |
|
|
if (sk->state == TCP_ESTABLISHED &&
|
| 837 |
|
|
!ipv6_addr_cmp(daddr, &sk->net_pinfo.af_inet6.daddr))
|
| 838 |
|
|
daddr = &sk->net_pinfo.af_inet6.daddr;
|
| 839 |
|
|
|
| 840 |
|
|
if (addr_len >= sizeof(struct sockaddr_in6) &&
|
| 841 |
|
|
sin6->sin6_scope_id &&
|
| 842 |
|
|
ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
|
| 843 |
|
|
fl.oif = sin6->sin6_scope_id;
|
| 844 |
|
|
} else {
|
| 845 |
|
|
if (sk->state != TCP_ESTABLISHED)
|
| 846 |
|
|
return -EDESTADDRREQ;
|
| 847 |
|
|
|
| 848 |
|
|
udh.uh.dest = sk->dport;
|
| 849 |
|
|
daddr = &sk->net_pinfo.af_inet6.daddr;
|
| 850 |
|
|
fl.fl6_flowlabel = np->flow_label;
|
| 851 |
|
|
}
|
| 852 |
|
|
|
| 853 |
|
|
addr_type = ipv6_addr_type(daddr);
|
| 854 |
|
|
|
| 855 |
|
|
if (addr_type == IPV6_ADDR_MAPPED) {
|
| 856 |
|
|
struct sockaddr_in sin;
|
| 857 |
|
|
|
| 858 |
|
|
if (__ipv6_only_sock(sk))
|
| 859 |
|
|
return -ENETUNREACH;
|
| 860 |
|
|
|
| 861 |
|
|
sin.sin_family = AF_INET;
|
| 862 |
|
|
sin.sin_addr.s_addr = daddr->s6_addr32[3];
|
| 863 |
|
|
sin.sin_port = udh.uh.dest;
|
| 864 |
|
|
msg->msg_name = (struct sockaddr *)(&sin);
|
| 865 |
|
|
msg->msg_namelen = sizeof(sin);
|
| 866 |
|
|
fl6_sock_release(flowlabel);
|
| 867 |
|
|
|
| 868 |
|
|
return udp_sendmsg(sk, msg, ulen);
|
| 869 |
|
|
}
|
| 870 |
|
|
|
| 871 |
|
|
udh.daddr = NULL;
|
| 872 |
|
|
if (!fl.oif)
|
| 873 |
|
|
fl.oif = sk->bound_dev_if;
|
| 874 |
|
|
fl.fl6_src = NULL;
|
| 875 |
|
|
|
| 876 |
|
|
if (msg->msg_controllen) {
|
| 877 |
|
|
opt = &opt_space;
|
| 878 |
|
|
memset(opt, 0, sizeof(struct ipv6_txoptions));
|
| 879 |
|
|
|
| 880 |
|
|
err = datagram_send_ctl(msg, &fl, opt, &hlimit);
|
| 881 |
|
|
if (err < 0) {
|
| 882 |
|
|
fl6_sock_release(flowlabel);
|
| 883 |
|
|
return err;
|
| 884 |
|
|
}
|
| 885 |
|
|
if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
|
| 886 |
|
|
flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
|
| 887 |
|
|
if (flowlabel == NULL)
|
| 888 |
|
|
return -EINVAL;
|
| 889 |
|
|
}
|
| 890 |
|
|
if (!(opt->opt_nflen|opt->opt_flen))
|
| 891 |
|
|
opt = NULL;
|
| 892 |
|
|
}
|
| 893 |
|
|
if (opt == NULL)
|
| 894 |
|
|
opt = np->opt;
|
| 895 |
|
|
if (flowlabel)
|
| 896 |
|
|
opt = fl6_merge_options(&opt_space, flowlabel, opt);
|
| 897 |
|
|
if (opt && opt->srcrt)
|
| 898 |
|
|
udh.daddr = daddr;
|
| 899 |
|
|
|
| 900 |
|
|
udh.uh.source = sk->sport;
|
| 901 |
|
|
udh.uh.len = len < 0x10000 ? htons(len) : 0;
|
| 902 |
|
|
udh.uh.check = 0;
|
| 903 |
|
|
udh.iov = msg->msg_iov;
|
| 904 |
|
|
udh.wcheck = 0;
|
| 905 |
|
|
udh.pl_len = len;
|
| 906 |
|
|
|
| 907 |
|
|
fl.proto = IPPROTO_UDP;
|
| 908 |
|
|
fl.fl6_dst = daddr;
|
| 909 |
|
|
if (fl.fl6_src == NULL && !ipv6_addr_any(&np->saddr))
|
| 910 |
|
|
fl.fl6_src = &np->saddr;
|
| 911 |
|
|
fl.uli_u.ports.dport = udh.uh.dest;
|
| 912 |
|
|
fl.uli_u.ports.sport = udh.uh.source;
|
| 913 |
|
|
|
| 914 |
|
|
err = ip6_build_xmit(sk, udpv6_getfrag, &udh, &fl, len, opt, hlimit,
|
| 915 |
|
|
msg->msg_flags);
|
| 916 |
|
|
|
| 917 |
|
|
fl6_sock_release(flowlabel);
|
| 918 |
|
|
|
| 919 |
|
|
if (err < 0)
|
| 920 |
|
|
return err;
|
| 921 |
|
|
|
| 922 |
|
|
UDP6_INC_STATS_USER(UdpOutDatagrams);
|
| 923 |
|
|
return ulen;
|
| 924 |
|
|
}
|
| 925 |
|
|
|
| 926 |
|
|
static struct inet6_protocol udpv6_protocol =
|
| 927 |
|
|
{
|
| 928 |
|
|
udpv6_rcv, /* UDP handler */
|
| 929 |
|
|
udpv6_err, /* UDP error control */
|
| 930 |
|
|
NULL, /* next */
|
| 931 |
|
|
IPPROTO_UDP, /* protocol ID */
|
| 932 |
|
|
0, /* copy */
|
| 933 |
|
|
NULL, /* data */
|
| 934 |
|
|
"UDPv6" /* name */
|
| 935 |
|
|
};
|
| 936 |
|
|
|
| 937 |
|
|
#define LINE_LEN 190
|
| 938 |
|
|
#define LINE_FMT "%-190s\n"
|
| 939 |
|
|
|
| 940 |
|
|
static void get_udp6_sock(struct sock *sp, char *tmpbuf, int i)
|
| 941 |
|
|
{
|
| 942 |
|
|
struct in6_addr *dest, *src;
|
| 943 |
|
|
__u16 destp, srcp;
|
| 944 |
|
|
|
| 945 |
|
|
dest = &sp->net_pinfo.af_inet6.daddr;
|
| 946 |
|
|
src = &sp->net_pinfo.af_inet6.rcv_saddr;
|
| 947 |
|
|
destp = ntohs(sp->dport);
|
| 948 |
|
|
srcp = ntohs(sp->sport);
|
| 949 |
|
|
sprintf(tmpbuf,
|
| 950 |
|
|
"%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
|
| 951 |
|
|
"%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p",
|
| 952 |
|
|
i,
|
| 953 |
|
|
src->s6_addr32[0], src->s6_addr32[1],
|
| 954 |
|
|
src->s6_addr32[2], src->s6_addr32[3], srcp,
|
| 955 |
|
|
dest->s6_addr32[0], dest->s6_addr32[1],
|
| 956 |
|
|
dest->s6_addr32[2], dest->s6_addr32[3], destp,
|
| 957 |
|
|
sp->state,
|
| 958 |
|
|
atomic_read(&sp->wmem_alloc), atomic_read(&sp->rmem_alloc),
|
| 959 |
|
|
0, 0L, 0,
|
| 960 |
|
|
sock_i_uid(sp), 0,
|
| 961 |
|
|
sock_i_ino(sp),
|
| 962 |
|
|
atomic_read(&sp->refcnt), sp);
|
| 963 |
|
|
}
|
| 964 |
|
|
|
| 965 |
|
|
int udp6_get_info(char *buffer, char **start, off_t offset, int length)
|
| 966 |
|
|
{
|
| 967 |
|
|
int len = 0, num = 0, i;
|
| 968 |
|
|
off_t pos = 0;
|
| 969 |
|
|
off_t begin;
|
| 970 |
|
|
char tmpbuf[LINE_LEN+2];
|
| 971 |
|
|
|
| 972 |
|
|
if (offset < LINE_LEN+1)
|
| 973 |
|
|
len += sprintf(buffer, LINE_FMT,
|
| 974 |
|
|
" sl " /* 6 */
|
| 975 |
|
|
"local_address " /* 38 */
|
| 976 |
|
|
"remote_address " /* 38 */
|
| 977 |
|
|
"st tx_queue rx_queue tr tm->when retrnsmt" /* 41 */
|
| 978 |
|
|
" uid timeout inode"); /* 21 */
|
| 979 |
|
|
/*----*/
|
| 980 |
|
|
/*144 */
|
| 981 |
|
|
pos = LINE_LEN+1;
|
| 982 |
|
|
read_lock(&udp_hash_lock);
|
| 983 |
|
|
for (i = 0; i < UDP_HTABLE_SIZE; i++) {
|
| 984 |
|
|
struct sock *sk;
|
| 985 |
|
|
|
| 986 |
|
|
for (sk = udp_hash[i]; sk; sk = sk->next, num++) {
|
| 987 |
|
|
if (sk->family != PF_INET6)
|
| 988 |
|
|
continue;
|
| 989 |
|
|
pos += LINE_LEN+1;
|
| 990 |
|
|
if (pos <= offset)
|
| 991 |
|
|
continue;
|
| 992 |
|
|
get_udp6_sock(sk, tmpbuf, i);
|
| 993 |
|
|
len += sprintf(buffer+len, LINE_FMT, tmpbuf);
|
| 994 |
|
|
if(len >= length)
|
| 995 |
|
|
goto out;
|
| 996 |
|
|
}
|
| 997 |
|
|
}
|
| 998 |
|
|
out:
|
| 999 |
|
|
read_unlock(&udp_hash_lock);
|
| 1000 |
|
|
begin = len - (pos - offset);
|
| 1001 |
|
|
*start = buffer + begin;
|
| 1002 |
|
|
len -= begin;
|
| 1003 |
|
|
if(len > length)
|
| 1004 |
|
|
len = length;
|
| 1005 |
|
|
if (len < 0)
|
| 1006 |
|
|
len = 0;
|
| 1007 |
|
|
return len;
|
| 1008 |
|
|
}
|
| 1009 |
|
|
|
| 1010 |
|
|
struct proto udpv6_prot = {
|
| 1011 |
|
|
name: "UDP",
|
| 1012 |
|
|
close: udpv6_close,
|
| 1013 |
|
|
connect: udpv6_connect,
|
| 1014 |
|
|
disconnect: udp_disconnect,
|
| 1015 |
|
|
ioctl: udp_ioctl,
|
| 1016 |
|
|
destroy: inet6_destroy_sock,
|
| 1017 |
|
|
setsockopt: ipv6_setsockopt,
|
| 1018 |
|
|
getsockopt: ipv6_getsockopt,
|
| 1019 |
|
|
sendmsg: udpv6_sendmsg,
|
| 1020 |
|
|
recvmsg: udpv6_recvmsg,
|
| 1021 |
|
|
backlog_rcv: udpv6_queue_rcv_skb,
|
| 1022 |
|
|
hash: udp_v6_hash,
|
| 1023 |
|
|
unhash: udp_v6_unhash,
|
| 1024 |
|
|
get_port: udp_v6_get_port,
|
| 1025 |
|
|
};
|
| 1026 |
|
|
|
| 1027 |
|
|
extern struct proto_ops inet6_dgram_ops;
|
| 1028 |
|
|
|
| 1029 |
|
|
static struct inet_protosw udpv6_protosw = {
|
| 1030 |
|
|
type: SOCK_DGRAM,
|
| 1031 |
|
|
protocol: IPPROTO_UDP,
|
| 1032 |
|
|
prot: &udpv6_prot,
|
| 1033 |
|
|
ops: &inet6_dgram_ops,
|
| 1034 |
|
|
capability: -1,
|
| 1035 |
|
|
no_check: UDP_CSUM_DEFAULT,
|
| 1036 |
|
|
flags: INET_PROTOSW_PERMANENT,
|
| 1037 |
|
|
};
|
| 1038 |
|
|
|
| 1039 |
|
|
|
| 1040 |
|
|
void __init udpv6_init(void)
|
| 1041 |
|
|
{
|
| 1042 |
|
|
inet6_add_protocol(&udpv6_protocol);
|
| 1043 |
|
|
inet6_register_protosw(&udpv6_protosw);
|
| 1044 |
|
|
}
|
