1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/nsprpub/pr/src/io/pripv6.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,364 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/*
1.10 +** File: pripv6.c
1.11 +** Description: Support for various functions unique to IPv6
1.12 +*/
1.13 +#include "primpl.h"
1.14 +#include <string.h>
1.15 +
1.16 +#if !defined(_PR_INET6) || defined(_PR_INET6_PROBE)
1.17 +
1.18 +static PRIOMethods ipv6_to_v4_tcpMethods;
1.19 +static PRIOMethods ipv6_to_v4_udpMethods;
1.20 +static PRDescIdentity _pr_ipv6_to_ipv4_id;
1.21 +extern PRBool IsValidNetAddr(const PRNetAddr *addr);
1.22 +extern PRIPv6Addr _pr_in6addr_any;
1.23 +extern PRIPv6Addr _pr_in6addr_loopback;
1.24 +
1.25 +/*
1.26 + * convert an IPv4-mapped IPv6 addr to an IPv4 addr
1.27 + */
1.28 +static void _PR_ConvertToIpv4NetAddr(const PRNetAddr *src_v6addr,
1.29 + PRNetAddr *dst_v4addr)
1.30 +{
1.31 +const PRUint8 *srcp;
1.32 +
1.33 + PR_ASSERT(PR_AF_INET6 == src_v6addr->ipv6.family);
1.34 +
1.35 + if (PR_IsNetAddrType(src_v6addr, PR_IpAddrV4Mapped)) {
1.36 + srcp = src_v6addr->ipv6.ip.pr_s6_addr;
1.37 + memcpy((char *) &dst_v4addr->inet.ip, srcp + 12, 4);
1.38 + } else if (PR_IsNetAddrType(src_v6addr, PR_IpAddrAny)) {
1.39 + dst_v4addr->inet.ip = htonl(INADDR_ANY);
1.40 + } else if (PR_IsNetAddrType(src_v6addr, PR_IpAddrLoopback)) {
1.41 + dst_v4addr->inet.ip = htonl(INADDR_LOOPBACK);
1.42 + }
1.43 + dst_v4addr->inet.family = PR_AF_INET;
1.44 + dst_v4addr->inet.port = src_v6addr->ipv6.port;
1.45 +}
1.46 +
1.47 +/*
1.48 + * convert an IPv4 addr to an IPv4-mapped IPv6 addr
1.49 + */
1.50 +static void _PR_ConvertToIpv6NetAddr(const PRNetAddr *src_v4addr,
1.51 + PRNetAddr *dst_v6addr)
1.52 +{
1.53 +PRUint8 *dstp;
1.54 +
1.55 + PR_ASSERT(PR_AF_INET == src_v4addr->inet.family);
1.56 + dst_v6addr->ipv6.family = PR_AF_INET6;
1.57 + dst_v6addr->ipv6.port = src_v4addr->inet.port;
1.58 +
1.59 + if (htonl(INADDR_ANY) == src_v4addr->inet.ip) {
1.60 + dst_v6addr->ipv6.ip = _pr_in6addr_any;
1.61 + } else {
1.62 + dstp = dst_v6addr->ipv6.ip.pr_s6_addr;
1.63 + memset(dstp, 0, 10);
1.64 + memset(dstp + 10, 0xff, 2);
1.65 + memcpy(dstp + 12,(char *) &src_v4addr->inet.ip, 4);
1.66 + }
1.67 +}
1.68 +
1.69 +static PRStatus PR_CALLBACK Ipv6ToIpv4SocketBind(PRFileDesc *fd,
1.70 + const PRNetAddr *addr)
1.71 +{
1.72 + PRNetAddr tmp_ipv4addr;
1.73 + const PRNetAddr *tmp_addrp;
1.74 + PRFileDesc *lo = fd->lower;
1.75 +
1.76 + if (PR_AF_INET6 != addr->raw.family) {
1.77 + PR_SetError(PR_ADDRESS_NOT_SUPPORTED_ERROR, 0);
1.78 + return PR_FAILURE;
1.79 + }
1.80 + if (PR_IsNetAddrType(addr, PR_IpAddrV4Mapped) ||
1.81 + PR_IsNetAddrType(addr, PR_IpAddrAny)) {
1.82 + _PR_ConvertToIpv4NetAddr(addr, &tmp_ipv4addr);
1.83 + tmp_addrp = &tmp_ipv4addr;
1.84 + } else {
1.85 + PR_SetError(PR_NETWORK_UNREACHABLE_ERROR, 0);
1.86 + return PR_FAILURE;
1.87 + }
1.88 + return((lo->methods->bind)(lo,tmp_addrp));
1.89 +}
1.90 +
1.91 +static PRStatus PR_CALLBACK Ipv6ToIpv4SocketConnect(
1.92 + PRFileDesc *fd, const PRNetAddr *addr, PRIntervalTime timeout)
1.93 +{
1.94 + PRNetAddr tmp_ipv4addr;
1.95 + const PRNetAddr *tmp_addrp;
1.96 +
1.97 + if (PR_AF_INET6 != addr->raw.family) {
1.98 + PR_SetError(PR_ADDRESS_NOT_SUPPORTED_ERROR, 0);
1.99 + return PR_FAILURE;
1.100 + }
1.101 + if (PR_IsNetAddrType(addr, PR_IpAddrV4Mapped) ||
1.102 + PR_IsNetAddrType(addr, PR_IpAddrLoopback)) {
1.103 + _PR_ConvertToIpv4NetAddr(addr, &tmp_ipv4addr);
1.104 + tmp_addrp = &tmp_ipv4addr;
1.105 + } else {
1.106 + PR_SetError(PR_NETWORK_UNREACHABLE_ERROR, 0);
1.107 + return PR_FAILURE;
1.108 + }
1.109 + return (fd->lower->methods->connect)(fd->lower, tmp_addrp, timeout);
1.110 +}
1.111 +
1.112 +static PRInt32 PR_CALLBACK Ipv6ToIpv4SocketSendTo(
1.113 + PRFileDesc *fd, const void *buf, PRInt32 amount,
1.114 + PRIntn flags, const PRNetAddr *addr, PRIntervalTime timeout)
1.115 +{
1.116 + PRNetAddr tmp_ipv4addr;
1.117 + const PRNetAddr *tmp_addrp;
1.118 +
1.119 + if (PR_AF_INET6 != addr->raw.family) {
1.120 + PR_SetError(PR_ADDRESS_NOT_SUPPORTED_ERROR, 0);
1.121 + return PR_FAILURE;
1.122 + }
1.123 + if (PR_IsNetAddrType(addr, PR_IpAddrV4Mapped) ||
1.124 + PR_IsNetAddrType(addr, PR_IpAddrLoopback)) {
1.125 + _PR_ConvertToIpv4NetAddr(addr, &tmp_ipv4addr);
1.126 + tmp_addrp = &tmp_ipv4addr;
1.127 + } else {
1.128 + PR_SetError(PR_NETWORK_UNREACHABLE_ERROR, 0);
1.129 + return PR_FAILURE;
1.130 + }
1.131 + return (fd->lower->methods->sendto)(
1.132 + fd->lower, buf, amount, flags, tmp_addrp, timeout);
1.133 +}
1.134 +
1.135 +static PRFileDesc* PR_CALLBACK Ipv6ToIpv4SocketAccept (
1.136 + PRFileDesc *fd, PRNetAddr *addr, PRIntervalTime timeout)
1.137 +{
1.138 + PRStatus rv;
1.139 + PRFileDesc *newfd;
1.140 + PRFileDesc *newstack;
1.141 + PRNetAddr tmp_ipv4addr;
1.142 + PRNetAddr *addrlower = NULL;
1.143 +
1.144 + PR_ASSERT(fd != NULL);
1.145 + PR_ASSERT(fd->lower != NULL);
1.146 +
1.147 + newstack = PR_NEW(PRFileDesc);
1.148 + if (NULL == newstack)
1.149 + {
1.150 + PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
1.151 + return NULL;
1.152 + }
1.153 + *newstack = *fd; /* make a copy of the accepting layer */
1.154 +
1.155 + if (addr)
1.156 + addrlower = &tmp_ipv4addr;
1.157 + newfd = (fd->lower->methods->accept)(fd->lower, addrlower, timeout);
1.158 + if (NULL == newfd)
1.159 + {
1.160 + PR_DELETE(newstack);
1.161 + return NULL;
1.162 + }
1.163 + if (addr)
1.164 + _PR_ConvertToIpv6NetAddr(&tmp_ipv4addr, addr);
1.165 +
1.166 + rv = PR_PushIOLayer(newfd, PR_TOP_IO_LAYER, newstack);
1.167 + PR_ASSERT(PR_SUCCESS == rv);
1.168 + return newfd; /* that's it */
1.169 +}
1.170 +
1.171 +static PRInt32 PR_CALLBACK Ipv6ToIpv4SocketAcceptRead(PRFileDesc *sd,
1.172 + PRFileDesc **nd, PRNetAddr **ipv6_raddr, void *buf, PRInt32 amount,
1.173 + PRIntervalTime timeout)
1.174 +{
1.175 + PRInt32 nbytes;
1.176 + PRStatus rv;
1.177 + PRNetAddr tmp_ipv4addr;
1.178 + PRFileDesc *newstack;
1.179 +
1.180 + PR_ASSERT(sd != NULL);
1.181 + PR_ASSERT(sd->lower != NULL);
1.182 +
1.183 + newstack = PR_NEW(PRFileDesc);
1.184 + if (NULL == newstack)
1.185 + {
1.186 + PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
1.187 + return -1;
1.188 + }
1.189 + *newstack = *sd; /* make a copy of the accepting layer */
1.190 +
1.191 + nbytes = sd->lower->methods->acceptread(
1.192 + sd->lower, nd, ipv6_raddr, buf, amount, timeout);
1.193 + if (-1 == nbytes)
1.194 + {
1.195 + PR_DELETE(newstack);
1.196 + return nbytes;
1.197 + }
1.198 + tmp_ipv4addr = **ipv6_raddr; /* copy */
1.199 + _PR_ConvertToIpv6NetAddr(&tmp_ipv4addr, *ipv6_raddr);
1.200 +
1.201 + /* this PR_PushIOLayer call cannot fail */
1.202 + rv = PR_PushIOLayer(*nd, PR_TOP_IO_LAYER, newstack);
1.203 + PR_ASSERT(PR_SUCCESS == rv);
1.204 + return nbytes;
1.205 +}
1.206 +
1.207 +static PRStatus PR_CALLBACK Ipv6ToIpv4SocketGetName(PRFileDesc *fd,
1.208 + PRNetAddr *ipv6addr)
1.209 +{
1.210 + PRStatus result;
1.211 + PRNetAddr tmp_ipv4addr;
1.212 +
1.213 + result = (fd->lower->methods->getsockname)(fd->lower, &tmp_ipv4addr);
1.214 + if (PR_SUCCESS == result) {
1.215 + _PR_ConvertToIpv6NetAddr(&tmp_ipv4addr, ipv6addr);
1.216 + PR_ASSERT(IsValidNetAddr(ipv6addr) == PR_TRUE);
1.217 + }
1.218 + return result;
1.219 +}
1.220 +
1.221 +static PRStatus PR_CALLBACK Ipv6ToIpv4SocketGetPeerName(PRFileDesc *fd,
1.222 + PRNetAddr *ipv6addr)
1.223 +{
1.224 + PRStatus result;
1.225 + PRNetAddr tmp_ipv4addr;
1.226 +
1.227 + result = (fd->lower->methods->getpeername)(fd->lower, &tmp_ipv4addr);
1.228 + if (PR_SUCCESS == result) {
1.229 + _PR_ConvertToIpv6NetAddr(&tmp_ipv4addr, ipv6addr);
1.230 + PR_ASSERT(IsValidNetAddr(ipv6addr) == PR_TRUE);
1.231 + }
1.232 + return result;
1.233 +}
1.234 +
1.235 +static PRInt32 PR_CALLBACK Ipv6ToIpv4SocketRecvFrom(PRFileDesc *fd, void *buf,
1.236 + PRInt32 amount, PRIntn flags, PRNetAddr *ipv6addr,
1.237 + PRIntervalTime timeout)
1.238 +{
1.239 + PRNetAddr tmp_ipv4addr;
1.240 + PRInt32 result;
1.241 +
1.242 + result = (fd->lower->methods->recvfrom)(
1.243 + fd->lower, buf, amount, flags, &tmp_ipv4addr, timeout);
1.244 + if (-1 != result) {
1.245 + _PR_ConvertToIpv6NetAddr(&tmp_ipv4addr, ipv6addr);
1.246 + PR_ASSERT(IsValidNetAddr(ipv6addr) == PR_TRUE);
1.247 + }
1.248 + return result;
1.249 +}
1.250 +
1.251 +#if defined(_PR_INET6_PROBE)
1.252 +static PRBool ipv6_is_present;
1.253 +extern PRBool _pr_test_ipv6_socket(void);
1.254 +
1.255 +#if !defined(_PR_INET6) && defined(_PR_HAVE_GETIPNODEBYNAME)
1.256 +extern PRStatus _pr_find_getipnodebyname(void);
1.257 +#endif
1.258 +
1.259 +#if !defined(_PR_INET6) && defined(_PR_HAVE_GETADDRINFO)
1.260 +extern PRStatus _pr_find_getaddrinfo(void);
1.261 +#endif
1.262 +
1.263 +static PRBool
1.264 +_pr_probe_ipv6_presence(void)
1.265 +{
1.266 +#if !defined(_PR_INET6) && defined(_PR_HAVE_GETIPNODEBYNAME)
1.267 + if (_pr_find_getipnodebyname() != PR_SUCCESS)
1.268 + return PR_FALSE;
1.269 +#endif
1.270 +
1.271 +#if !defined(_PR_INET6) && defined(_PR_HAVE_GETADDRINFO)
1.272 + if (_pr_find_getaddrinfo() != PR_SUCCESS)
1.273 + return PR_FALSE;
1.274 +#endif
1.275 +
1.276 + return _pr_test_ipv6_socket();
1.277 +}
1.278 +#endif /* _PR_INET6_PROBE */
1.279 +
1.280 +static PRCallOnceType _pr_init_ipv6_once;
1.281 +
1.282 +static PRStatus PR_CALLBACK _pr_init_ipv6(void)
1.283 +{
1.284 + const PRIOMethods *stubMethods;
1.285 +
1.286 +#if defined(_PR_INET6_PROBE)
1.287 + ipv6_is_present = _pr_probe_ipv6_presence();
1.288 + if (ipv6_is_present)
1.289 + return PR_SUCCESS;
1.290 +#endif
1.291 +
1.292 + _pr_ipv6_to_ipv4_id = PR_GetUniqueIdentity("Ipv6_to_Ipv4 layer");
1.293 + PR_ASSERT(PR_INVALID_IO_LAYER != _pr_ipv6_to_ipv4_id);
1.294 +
1.295 + stubMethods = PR_GetDefaultIOMethods();
1.296 +
1.297 + ipv6_to_v4_tcpMethods = *stubMethods; /* first get the entire batch */
1.298 + /* then override the ones we care about */
1.299 + ipv6_to_v4_tcpMethods.connect = Ipv6ToIpv4SocketConnect;
1.300 + ipv6_to_v4_tcpMethods.bind = Ipv6ToIpv4SocketBind;
1.301 + ipv6_to_v4_tcpMethods.accept = Ipv6ToIpv4SocketAccept;
1.302 + ipv6_to_v4_tcpMethods.acceptread = Ipv6ToIpv4SocketAcceptRead;
1.303 + ipv6_to_v4_tcpMethods.getsockname = Ipv6ToIpv4SocketGetName;
1.304 + ipv6_to_v4_tcpMethods.getpeername = Ipv6ToIpv4SocketGetPeerName;
1.305 +/*
1.306 + ipv6_to_v4_tcpMethods.getsocketoption = Ipv6ToIpv4GetSocketOption;
1.307 + ipv6_to_v4_tcpMethods.setsocketoption = Ipv6ToIpv4SetSocketOption;
1.308 +*/
1.309 + ipv6_to_v4_udpMethods = *stubMethods; /* first get the entire batch */
1.310 + /* then override the ones we care about */
1.311 + ipv6_to_v4_udpMethods.connect = Ipv6ToIpv4SocketConnect;
1.312 + ipv6_to_v4_udpMethods.bind = Ipv6ToIpv4SocketBind;
1.313 + ipv6_to_v4_udpMethods.sendto = Ipv6ToIpv4SocketSendTo;
1.314 + ipv6_to_v4_udpMethods.recvfrom = Ipv6ToIpv4SocketRecvFrom;
1.315 + ipv6_to_v4_udpMethods.getsockname = Ipv6ToIpv4SocketGetName;
1.316 + ipv6_to_v4_udpMethods.getpeername = Ipv6ToIpv4SocketGetPeerName;
1.317 +/*
1.318 + ipv6_to_v4_udpMethods.getsocketoption = Ipv6ToIpv4GetSocketOption;
1.319 + ipv6_to_v4_udpMethods.setsocketoption = Ipv6ToIpv4SetSocketOption;
1.320 +*/
1.321 + return PR_SUCCESS;
1.322 +}
1.323 +
1.324 +#if defined(_PR_INET6_PROBE)
1.325 +PRBool _pr_ipv6_is_present(void)
1.326 +{
1.327 + if (PR_CallOnce(&_pr_init_ipv6_once, _pr_init_ipv6) != PR_SUCCESS)
1.328 + return PR_FALSE;
1.329 + return ipv6_is_present;
1.330 +}
1.331 +#endif
1.332 +
1.333 +PR_IMPLEMENT(PRStatus) _pr_push_ipv6toipv4_layer(PRFileDesc *fd)
1.334 +{
1.335 + PRFileDesc *ipv6_fd = NULL;
1.336 +
1.337 + if (PR_CallOnce(&_pr_init_ipv6_once, _pr_init_ipv6) != PR_SUCCESS)
1.338 + return PR_FAILURE;
1.339 +
1.340 + /*
1.341 + * For platforms with no support for IPv6
1.342 + * create layered socket for IPv4-mapped IPv6 addresses
1.343 + */
1.344 + if (fd->methods->file_type == PR_DESC_SOCKET_TCP)
1.345 + ipv6_fd = PR_CreateIOLayerStub(_pr_ipv6_to_ipv4_id,
1.346 + &ipv6_to_v4_tcpMethods);
1.347 + else
1.348 + ipv6_fd = PR_CreateIOLayerStub(_pr_ipv6_to_ipv4_id,
1.349 + &ipv6_to_v4_udpMethods);
1.350 + if (NULL == ipv6_fd) {
1.351 + goto errorExit;
1.352 + }
1.353 + ipv6_fd->secret = NULL;
1.354 +
1.355 + if (PR_PushIOLayer(fd, PR_TOP_IO_LAYER, ipv6_fd) == PR_FAILURE) {
1.356 + goto errorExit;
1.357 + }
1.358 +
1.359 + return PR_SUCCESS;
1.360 +errorExit:
1.361 +
1.362 + if (ipv6_fd)
1.363 + ipv6_fd->dtor(ipv6_fd);
1.364 + return PR_FAILURE;
1.365 +}
1.366 +
1.367 +#endif /* !defined(_PR_INET6) || defined(_PR_INET6_PROBE) */
