2 * Windows networking abstraction.
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4 * For the IPv6 code in here I am indebted to Jeroen Massar and
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12 #define DEFINE_PLUG_METHOD_MACROS
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14 #include "network.h"
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15 #include "tree234.h"
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17 #include <ws2tcpip.h>
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20 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
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21 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
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24 #define ipv4_is_loopback(addr) \
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25 ((p_ntohl(addr.s_addr) & 0xFF000000L) == 0x7F000000L)
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28 * We used to typedef struct Socket_tag *Socket.
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30 * Since we have made the networking abstraction slightly more
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31 * abstract, Socket no longer means a tcp socket (it could mean
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32 * an ssl socket). So now we must use Actual_Socket when we know
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33 * we are talking about a tcp socket.
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35 typedef struct Socket_tag *Actual_Socket;
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38 * Mutable state that goes with a SockAddr: stores information
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39 * about where in the list of candidate IP(v*) addresses we've
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42 typedef struct SockAddrStep_tag SockAddrStep;
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43 struct SockAddrStep_tag {
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45 struct addrinfo *ai; /* steps along addr->ais */
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51 const struct socket_function_table *fn;
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52 /* the above variable absolutely *must* be the first in this structure */
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57 bufchain output_data;
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60 int frozen; /* this causes readability notifications to be ignored */
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61 int frozen_readable; /* this means we missed at least one readability
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62 * notification while we were frozen */
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63 int localhost_only; /* for listening sockets */
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66 int oobinline, nodelay, keepalive, privport;
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70 int pending_error; /* in case send() returns error */
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72 * We sometimes need pairs of Socket structures to be linked:
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73 * if we are listening on the same IPv6 and v4 port, for
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74 * example. So here we define `parent' and `child' pointers to
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77 Actual_Socket parent, child;
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80 struct SockAddr_tag {
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85 struct addrinfo *ais; /* Addresses IPv6 style. */
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87 unsigned long *addresses; /* Addresses IPv4 style. */
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89 char hostname[512]; /* Store an unresolved host name. */
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93 * Which address family this address belongs to. AF_INET for IPv4;
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94 * AF_INET6 for IPv6; AF_UNSPEC indicates that name resolution has
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95 * not been done and a simple host name is held in this SockAddr
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99 #define SOCKADDR_FAMILY(addr, step) \
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100 (!(addr)->resolved ? AF_UNSPEC : \
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101 (step).ai ? (step).ai->ai_family : AF_INET)
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103 #define SOCKADDR_FAMILY(addr, step) \
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104 (!(addr)->resolved ? AF_UNSPEC : AF_INET)
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108 * Start a SockAddrStep structure to step through multiple
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112 #define START_STEP(addr, step) \
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113 ((step).ai = (addr)->ais, (step).curraddr = 0)
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115 #define START_STEP(addr, step) \
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116 ((step).curraddr = 0)
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119 static tree234 *sktree;
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121 static int cmpfortree(void *av, void *bv)
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123 Actual_Socket a = (Actual_Socket) av, b = (Actual_Socket) bv;
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124 unsigned long as = (unsigned long) a->s, bs = (unsigned long) b->s;
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136 static int cmpforsearch(void *av, void *bv)
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138 Actual_Socket b = (Actual_Socket) bv;
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139 unsigned long as = (unsigned long) av, bs = (unsigned long) b->s;
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147 DECL_WINDOWS_FUNCTION(static, int, WSAStartup, (WORD, LPWSADATA));
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148 DECL_WINDOWS_FUNCTION(static, int, WSACleanup, (void));
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149 DECL_WINDOWS_FUNCTION(static, int, closesocket, (SOCKET));
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150 DECL_WINDOWS_FUNCTION(static, u_long, ntohl, (u_long));
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151 DECL_WINDOWS_FUNCTION(static, u_long, htonl, (u_long));
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152 DECL_WINDOWS_FUNCTION(static, u_short, htons, (u_short));
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153 DECL_WINDOWS_FUNCTION(static, u_short, ntohs, (u_short));
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154 DECL_WINDOWS_FUNCTION(static, int, gethostname, (char *, int));
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155 DECL_WINDOWS_FUNCTION(static, struct hostent FAR *, gethostbyname,
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156 (const char FAR *));
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157 DECL_WINDOWS_FUNCTION(static, struct servent FAR *, getservbyname,
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158 (const char FAR *, const char FAR *));
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159 DECL_WINDOWS_FUNCTION(static, unsigned long, inet_addr, (const char FAR *));
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160 DECL_WINDOWS_FUNCTION(static, char FAR *, inet_ntoa, (struct in_addr));
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161 DECL_WINDOWS_FUNCTION(static, int, connect,
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162 (SOCKET, const struct sockaddr FAR *, int));
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163 DECL_WINDOWS_FUNCTION(static, int, bind,
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164 (SOCKET, const struct sockaddr FAR *, int));
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165 DECL_WINDOWS_FUNCTION(static, int, setsockopt,
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166 (SOCKET, int, int, const char FAR *, int));
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167 DECL_WINDOWS_FUNCTION(static, SOCKET, socket, (int, int, int));
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168 DECL_WINDOWS_FUNCTION(static, int, listen, (SOCKET, int));
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169 DECL_WINDOWS_FUNCTION(static, int, send, (SOCKET, const char FAR *, int, int));
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170 DECL_WINDOWS_FUNCTION(static, int, ioctlsocket,
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171 (SOCKET, long, u_long FAR *));
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172 DECL_WINDOWS_FUNCTION(static, SOCKET, accept,
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173 (SOCKET, struct sockaddr FAR *, int FAR *));
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174 DECL_WINDOWS_FUNCTION(static, int, recv, (SOCKET, char FAR *, int, int));
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175 DECL_WINDOWS_FUNCTION(static, int, WSAIoctl,
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176 (SOCKET, DWORD, LPVOID, DWORD, LPVOID, DWORD,
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177 LPDWORD, LPWSAOVERLAPPED,
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178 LPWSAOVERLAPPED_COMPLETION_ROUTINE));
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180 DECL_WINDOWS_FUNCTION(static, int, getaddrinfo,
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181 (const char *nodename, const char *servname,
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182 const struct addrinfo *hints, struct addrinfo **res));
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183 DECL_WINDOWS_FUNCTION(static, void, freeaddrinfo, (struct addrinfo *res));
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184 DECL_WINDOWS_FUNCTION(static, int, getnameinfo,
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185 (const struct sockaddr FAR * sa, socklen_t salen,
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186 char FAR * host, size_t hostlen, char FAR * serv,
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187 size_t servlen, int flags));
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188 DECL_WINDOWS_FUNCTION(static, char *, gai_strerror, (int ecode));
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189 DECL_WINDOWS_FUNCTION(static, int, WSAAddressToStringA,
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190 (LPSOCKADDR, DWORD, LPWSAPROTOCOL_INFO,
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194 static HMODULE winsock_module = NULL;
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195 static WSADATA wsadata;
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197 static HMODULE winsock2_module = NULL;
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198 static HMODULE wship6_module = NULL;
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201 int sk_startup(int hi, int lo)
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205 winsock_ver = MAKEWORD(hi, lo);
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207 if (p_WSAStartup(winsock_ver, &wsadata)) {
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211 if (LOBYTE(wsadata.wVersion) != LOBYTE(winsock_ver)) {
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215 #ifdef NET_SETUP_DIAGNOSTICS
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218 sprintf(buf, "Using WinSock %d.%d", hi, lo);
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219 logevent(NULL, buf);
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230 winsock_module = load_system32_dll("ws2_32.dll");
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231 if (!winsock_module) {
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232 winsock_module = load_system32_dll("wsock32.dll");
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234 if (!winsock_module)
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235 fatalbox("Unable to load any WinSock library");
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238 /* Check if we have getaddrinfo in Winsock */
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239 if (GetProcAddress(winsock_module, "getaddrinfo") != NULL) {
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240 #ifdef NET_SETUP_DIAGNOSTICS
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241 logevent(NULL, "Native WinSock IPv6 support detected");
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243 GET_WINDOWS_FUNCTION(winsock_module, getaddrinfo);
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244 GET_WINDOWS_FUNCTION(winsock_module, freeaddrinfo);
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245 GET_WINDOWS_FUNCTION(winsock_module, getnameinfo);
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246 GET_WINDOWS_FUNCTION(winsock_module, gai_strerror);
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248 /* Fall back to wship6.dll for Windows 2000 */
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249 wship6_module = load_system32_dll("wship6.dll");
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250 if (wship6_module) {
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251 #ifdef NET_SETUP_DIAGNOSTICS
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252 logevent(NULL, "WSH IPv6 support detected");
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254 GET_WINDOWS_FUNCTION(wship6_module, getaddrinfo);
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255 GET_WINDOWS_FUNCTION(wship6_module, freeaddrinfo);
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256 GET_WINDOWS_FUNCTION(wship6_module, getnameinfo);
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257 GET_WINDOWS_FUNCTION(wship6_module, gai_strerror);
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259 #ifdef NET_SETUP_DIAGNOSTICS
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260 logevent(NULL, "No IPv6 support detected");
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264 GET_WINDOWS_FUNCTION(winsock2_module, WSAAddressToStringA);
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266 #ifdef NET_SETUP_DIAGNOSTICS
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267 logevent(NULL, "PuTTY was built without IPv6 support");
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271 GET_WINDOWS_FUNCTION(winsock_module, WSAAsyncSelect);
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272 GET_WINDOWS_FUNCTION(winsock_module, WSAEventSelect);
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273 GET_WINDOWS_FUNCTION(winsock_module, select);
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274 GET_WINDOWS_FUNCTION(winsock_module, WSAGetLastError);
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275 GET_WINDOWS_FUNCTION(winsock_module, WSAEnumNetworkEvents);
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276 GET_WINDOWS_FUNCTION(winsock_module, WSAStartup);
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277 GET_WINDOWS_FUNCTION(winsock_module, WSACleanup);
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278 GET_WINDOWS_FUNCTION(winsock_module, closesocket);
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279 GET_WINDOWS_FUNCTION(winsock_module, ntohl);
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280 GET_WINDOWS_FUNCTION(winsock_module, htonl);
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281 GET_WINDOWS_FUNCTION(winsock_module, htons);
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282 GET_WINDOWS_FUNCTION(winsock_module, ntohs);
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283 GET_WINDOWS_FUNCTION(winsock_module, gethostname);
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284 GET_WINDOWS_FUNCTION(winsock_module, gethostbyname);
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285 GET_WINDOWS_FUNCTION(winsock_module, getservbyname);
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286 GET_WINDOWS_FUNCTION(winsock_module, inet_addr);
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287 GET_WINDOWS_FUNCTION(winsock_module, inet_ntoa);
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288 GET_WINDOWS_FUNCTION(winsock_module, connect);
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289 GET_WINDOWS_FUNCTION(winsock_module, bind);
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290 GET_WINDOWS_FUNCTION(winsock_module, setsockopt);
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291 GET_WINDOWS_FUNCTION(winsock_module, socket);
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292 GET_WINDOWS_FUNCTION(winsock_module, listen);
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293 GET_WINDOWS_FUNCTION(winsock_module, send);
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294 GET_WINDOWS_FUNCTION(winsock_module, ioctlsocket);
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295 GET_WINDOWS_FUNCTION(winsock_module, accept);
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296 GET_WINDOWS_FUNCTION(winsock_module, recv);
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297 GET_WINDOWS_FUNCTION(winsock_module, WSAIoctl);
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299 /* Try to get the best WinSock version we can get */
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300 if (!sk_startup(2,2) &&
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301 !sk_startup(2,0) &&
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302 !sk_startup(1,1)) {
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303 fatalbox("Unable to initialise WinSock");
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306 sktree = newtree234(cmpfortree);
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309 void sk_cleanup(void)
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315 for (i = 0; (s = index234(sktree, i)) != NULL; i++) {
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316 p_closesocket(s->s);
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318 freetree234(sktree);
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324 if (winsock_module)
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325 FreeLibrary(winsock_module);
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328 FreeLibrary(wship6_module);
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332 char *winsock_error_string(int error)
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336 return "Network error: Permission denied";
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337 case WSAEADDRINUSE:
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338 return "Network error: Address already in use";
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339 case WSAEADDRNOTAVAIL:
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340 return "Network error: Cannot assign requested address";
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341 case WSAEAFNOSUPPORT:
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343 "Network error: Address family not supported by protocol family";
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345 return "Network error: Operation already in progress";
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346 case WSAECONNABORTED:
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347 return "Network error: Software caused connection abort";
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348 case WSAECONNREFUSED:
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349 return "Network error: Connection refused";
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350 case WSAECONNRESET:
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351 return "Network error: Connection reset by peer";
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352 case WSAEDESTADDRREQ:
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353 return "Network error: Destination address required";
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355 return "Network error: Bad address";
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357 return "Network error: Host is down";
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358 case WSAEHOSTUNREACH:
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359 return "Network error: No route to host";
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360 case WSAEINPROGRESS:
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361 return "Network error: Operation now in progress";
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363 return "Network error: Interrupted function call";
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365 return "Network error: Invalid argument";
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367 return "Network error: Socket is already connected";
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369 return "Network error: Too many open files";
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371 return "Network error: Message too long";
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373 return "Network error: Network is down";
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375 return "Network error: Network dropped connection on reset";
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376 case WSAENETUNREACH:
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377 return "Network error: Network is unreachable";
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379 return "Network error: No buffer space available";
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380 case WSAENOPROTOOPT:
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381 return "Network error: Bad protocol option";
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383 return "Network error: Socket is not connected";
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385 return "Network error: Socket operation on non-socket";
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386 case WSAEOPNOTSUPP:
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387 return "Network error: Operation not supported";
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388 case WSAEPFNOSUPPORT:
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389 return "Network error: Protocol family not supported";
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391 return "Network error: Too many processes";
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392 case WSAEPROTONOSUPPORT:
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393 return "Network error: Protocol not supported";
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394 case WSAEPROTOTYPE:
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395 return "Network error: Protocol wrong type for socket";
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397 return "Network error: Cannot send after socket shutdown";
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398 case WSAESOCKTNOSUPPORT:
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399 return "Network error: Socket type not supported";
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401 return "Network error: Connection timed out";
\r
402 case WSAEWOULDBLOCK:
\r
403 return "Network error: Resource temporarily unavailable";
\r
405 return "Network error: Graceful shutdown in progress";
\r
407 return "Unknown network error";
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411 SockAddr sk_namelookup(const char *host, char **canonicalname,
\r
412 int address_family)
\r
414 SockAddr ret = snew(struct SockAddr_tag);
\r
416 char realhost[8192];
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419 /* Default to IPv4. */
\r
420 hint_family = (address_family == ADDRTYPE_IPV4 ? AF_INET :
\r
422 address_family == ADDRTYPE_IPV6 ? AF_INET6 :
\r
426 /* Clear the structure and default to IPv4. */
\r
427 memset(ret, 0, sizeof(struct SockAddr_tag));
\r
431 ret->addresses = NULL;
\r
432 ret->resolved = FALSE;
\r
436 if ((a = p_inet_addr(host)) == (unsigned long) INADDR_NONE) {
\r
437 struct hostent *h = NULL;
\r
441 * Use getaddrinfo when it's available
\r
443 if (p_getaddrinfo) {
\r
444 struct addrinfo hints;
\r
445 #ifdef NET_SETUP_DIAGNOSTICS
\r
446 logevent(NULL, "Using getaddrinfo() for resolving");
\r
448 memset(&hints, 0, sizeof(hints));
\r
449 hints.ai_family = hint_family;
\r
450 hints.ai_flags = AI_CANONNAME;
\r
451 if ((err = p_getaddrinfo(host, NULL, &hints, &ret->ais)) == 0)
\r
452 ret->resolved = TRUE;
\r
456 #ifdef NET_SETUP_DIAGNOSTICS
\r
457 logevent(NULL, "Using gethostbyname() for resolving");
\r
460 * Otherwise use the IPv4-only gethostbyname...
\r
461 * (NOTE: we don't use gethostbyname as a fallback!)
\r
463 if ( (h = p_gethostbyname(host)) )
\r
464 ret->resolved = TRUE;
\r
466 err = p_WSAGetLastError();
\r
469 if (!ret->resolved) {
\r
470 ret->error = (err == WSAENETDOWN ? "Network is down" :
\r
471 err == WSAHOST_NOT_FOUND ? "Host does not exist" :
\r
472 err == WSATRY_AGAIN ? "Host not found" :
\r
474 p_getaddrinfo&&p_gai_strerror ? p_gai_strerror(err) :
\r
476 "gethostbyname: unknown error");
\r
481 /* If we got an address info use that... */
\r
483 /* Are we in IPv4 fallback mode? */
\r
484 /* We put the IPv4 address into the a variable so we can further-on use the IPv4 code... */
\r
485 if (ret->ais->ai_family == AF_INET)
\r
487 (char *) &((SOCKADDR_IN *) ret->ais->
\r
488 ai_addr)->sin_addr, sizeof(a));
\r
490 if (ret->ais->ai_canonname)
\r
491 strncpy(realhost, ret->ais->ai_canonname, lenof(realhost));
\r
493 strncpy(realhost, host, lenof(realhost));
\r
495 /* We used the IPv4-only gethostbyname()... */
\r
500 for (n = 0; h->h_addr_list[n]; n++);
\r
501 ret->addresses = snewn(n, unsigned long);
\r
502 ret->naddresses = n;
\r
503 for (n = 0; n < ret->naddresses; n++) {
\r
504 memcpy(&a, h->h_addr_list[n], sizeof(a));
\r
505 ret->addresses[n] = p_ntohl(a);
\r
507 memcpy(&a, h->h_addr, sizeof(a));
\r
508 /* This way we are always sure the h->h_name is valid :) */
\r
509 strncpy(realhost, h->h_name, sizeof(realhost));
\r
514 * This must be a numeric IPv4 address because it caused a
\r
515 * success return from inet_addr.
\r
517 ret->addresses = snewn(1, unsigned long);
\r
518 ret->naddresses = 1;
\r
519 ret->addresses[0] = p_ntohl(a);
\r
520 ret->resolved = TRUE;
\r
521 strncpy(realhost, host, sizeof(realhost));
\r
523 realhost[lenof(realhost)-1] = '\0';
\r
524 *canonicalname = snewn(1+strlen(realhost), char);
\r
525 strcpy(*canonicalname, realhost);
\r
529 SockAddr sk_nonamelookup(const char *host)
\r
531 SockAddr ret = snew(struct SockAddr_tag);
\r
533 ret->resolved = FALSE;
\r
537 ret->addresses = NULL;
\r
538 ret->naddresses = 0;
\r
540 strncpy(ret->hostname, host, lenof(ret->hostname));
\r
541 ret->hostname[lenof(ret->hostname)-1] = '\0';
\r
545 int sk_nextaddr(SockAddr addr, SockAddrStep *step)
\r
549 if (step->ai->ai_next) {
\r
550 step->ai = step->ai->ai_next;
\r
556 if (step->curraddr+1 < addr->naddresses) {
\r
564 void sk_getaddr(SockAddr addr, char *buf, int buflen)
\r
567 START_STEP(addr, step);
\r
572 if (p_WSAAddressToStringA) {
\r
573 DWORD dwbuflen = buflen;
\r
574 err = p_WSAAddressToStringA(step.ai->ai_addr, step.ai->ai_addrlen,
\r
575 NULL, buf, &dwbuflen);
\r
579 strncpy(buf, addr->hostname, buflen);
\r
581 strncpy(buf, "<unknown>", buflen);
\r
582 buf[buflen-1] = '\0';
\r
586 if (SOCKADDR_FAMILY(addr, step) == AF_INET) {
\r
588 assert(addr->addresses && step.curraddr < addr->naddresses);
\r
589 a.s_addr = p_htonl(addr->addresses[step.curraddr]);
\r
590 strncpy(buf, p_inet_ntoa(a), buflen);
\r
591 buf[buflen-1] = '\0';
\r
593 strncpy(buf, addr->hostname, buflen);
\r
594 buf[buflen-1] = '\0';
\r
598 int sk_hostname_is_local(char *name)
\r
600 return !strcmp(name, "localhost") ||
\r
601 !strcmp(name, "::1") ||
\r
602 !strncmp(name, "127.", 4);
\r
605 static INTERFACE_INFO local_interfaces[16];
\r
606 static int n_local_interfaces; /* 0=not yet, -1=failed, >0=number */
\r
608 static int ipv4_is_local_addr(struct in_addr addr)
\r
610 if (ipv4_is_loopback(addr))
\r
611 return 1; /* loopback addresses are local */
\r
612 if (!n_local_interfaces) {
\r
613 SOCKET s = p_socket(AF_INET, SOCK_DGRAM, 0);
\r
617 p_WSAIoctl(s, SIO_GET_INTERFACE_LIST, NULL, 0,
\r
618 local_interfaces, sizeof(local_interfaces),
\r
619 &retbytes, NULL, NULL) == 0)
\r
620 n_local_interfaces = retbytes / sizeof(INTERFACE_INFO);
\r
622 logevent(NULL, "Unable to get list of local IP addresses");
\r
624 if (n_local_interfaces > 0) {
\r
626 for (i = 0; i < n_local_interfaces; i++) {
\r
627 SOCKADDR_IN *address =
\r
628 (SOCKADDR_IN *)&local_interfaces[i].iiAddress;
\r
629 if (address->sin_addr.s_addr == addr.s_addr)
\r
630 return 1; /* this address is local */
\r
633 return 0; /* this address is not local */
\r
636 int sk_address_is_local(SockAddr addr)
\r
640 START_STEP(addr, step);
\r
641 family = SOCKADDR_FAMILY(addr, step);
\r
644 if (family == AF_INET6) {
\r
645 return IN6_IS_ADDR_LOOPBACK((const struct in6_addr *)step.ai->ai_addr);
\r
648 if (family == AF_INET) {
\r
651 return ipv4_is_local_addr(((struct sockaddr_in *)step.ai->ai_addr)
\r
657 assert(addr->addresses && step.curraddr < addr->naddresses);
\r
658 a.s_addr = p_htonl(addr->addresses[step.curraddr]);
\r
659 return ipv4_is_local_addr(a);
\r
662 assert(family == AF_UNSPEC);
\r
663 return 0; /* we don't know; assume not */
\r
667 int sk_addrtype(SockAddr addr)
\r
671 START_STEP(addr, step);
\r
672 family = SOCKADDR_FAMILY(addr, step);
\r
674 return (family == AF_INET ? ADDRTYPE_IPV4 :
\r
676 family == AF_INET6 ? ADDRTYPE_IPV6 :
\r
681 void sk_addrcopy(SockAddr addr, char *buf)
\r
685 START_STEP(addr, step);
\r
686 family = SOCKADDR_FAMILY(addr, step);
\r
688 assert(family != AF_UNSPEC);
\r
691 if (family == AF_INET)
\r
692 memcpy(buf, &((struct sockaddr_in *)step.ai->ai_addr)->sin_addr,
\r
693 sizeof(struct in_addr));
\r
694 else if (family == AF_INET6)
\r
695 memcpy(buf, &((struct sockaddr_in6 *)step.ai->ai_addr)->sin6_addr,
\r
696 sizeof(struct in6_addr));
\r
701 if (family == AF_INET) {
\r
703 assert(addr->addresses && step.curraddr < addr->naddresses);
\r
704 a.s_addr = p_htonl(addr->addresses[step.curraddr]);
\r
705 memcpy(buf, (char*) &a.s_addr, 4);
\r
709 void sk_addr_free(SockAddr addr)
\r
711 if (--addr->refcount > 0)
\r
714 if (addr->ais && p_freeaddrinfo)
\r
715 p_freeaddrinfo(addr->ais);
\r
717 if (addr->addresses)
\r
718 sfree(addr->addresses);
\r
722 SockAddr sk_addr_dup(SockAddr addr)
\r
728 static Plug sk_tcp_plug(Socket sock, Plug p)
\r
730 Actual_Socket s = (Actual_Socket) sock;
\r
731 Plug ret = s->plug;
\r
737 static void sk_tcp_flush(Socket s)
\r
740 * We send data to the socket as soon as we can anyway,
\r
741 * so we don't need to do anything here. :-)
\r
745 static void sk_tcp_close(Socket s);
\r
746 static int sk_tcp_write(Socket s, const char *data, int len);
\r
747 static int sk_tcp_write_oob(Socket s, const char *data, int len);
\r
748 static void sk_tcp_set_private_ptr(Socket s, void *ptr);
\r
749 static void *sk_tcp_get_private_ptr(Socket s);
\r
750 static void sk_tcp_set_frozen(Socket s, int is_frozen);
\r
751 static const char *sk_tcp_socket_error(Socket s);
\r
753 extern char *do_select(SOCKET skt, int startup);
\r
755 Socket sk_register(void *sock, Plug plug)
\r
757 static const struct socket_function_table fn_table = {
\r
763 sk_tcp_set_private_ptr,
\r
764 sk_tcp_get_private_ptr,
\r
766 sk_tcp_socket_error
\r
774 * Create Socket structure.
\r
776 ret = snew(struct Socket_tag);
\r
777 ret->fn = &fn_table;
\r
780 bufchain_init(&ret->output_data);
\r
781 ret->writable = 1; /* to start with */
\r
782 ret->sending_oob = 0;
\r
784 ret->frozen_readable = 0;
\r
785 ret->localhost_only = 0; /* unused, but best init anyway */
\r
786 ret->pending_error = 0;
\r
787 ret->parent = ret->child = NULL;
\r
790 ret->s = (SOCKET)sock;
\r
792 if (ret->s == INVALID_SOCKET) {
\r
793 err = p_WSAGetLastError();
\r
794 ret->error = winsock_error_string(err);
\r
795 return (Socket) ret;
\r
798 ret->oobinline = 0;
\r
800 /* Set up a select mechanism. This could be an AsyncSelect on a
\r
801 * window, or an EventSelect on an event object. */
\r
802 errstr = do_select(ret->s, 1);
\r
804 ret->error = errstr;
\r
805 return (Socket) ret;
\r
808 add234(sktree, ret);
\r
810 return (Socket) ret;
\r
813 static DWORD try_connect(Actual_Socket sock)
\r
825 if (sock->s != INVALID_SOCKET) {
\r
826 do_select(sock->s, 0);
\r
827 p_closesocket(sock->s);
\r
830 plug_log(sock->plug, 0, sock->addr, sock->port, NULL, 0);
\r
835 family = SOCKADDR_FAMILY(sock->addr, sock->step);
\r
838 * Remove the socket from the tree before we overwrite its
\r
839 * internal socket id, because that forms part of the tree's
\r
840 * sorting criterion. We'll add it back before exiting this
\r
841 * function, whether we changed anything or not.
\r
843 del234(sktree, sock);
\r
845 s = p_socket(family, SOCK_STREAM, 0);
\r
848 if (s == INVALID_SOCKET) {
\r
849 err = p_WSAGetLastError();
\r
850 sock->error = winsock_error_string(err);
\r
854 if (sock->oobinline) {
\r
856 p_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (void *) &b, sizeof(b));
\r
859 if (sock->nodelay) {
\r
861 p_setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (void *) &b, sizeof(b));
\r
864 if (sock->keepalive) {
\r
866 p_setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *) &b, sizeof(b));
\r
870 * Bind to local address.
\r
872 if (sock->privport)
\r
873 localport = 1023; /* count from 1023 downwards */
\r
875 localport = 0; /* just use port 0 (ie winsock picks) */
\r
877 /* Loop round trying to bind */
\r
882 if (family == AF_INET6) {
\r
883 memset(&a6, 0, sizeof(a6));
\r
884 a6.sin6_family = AF_INET6;
\r
885 /*a6.sin6_addr = in6addr_any; */ /* == 0 done by memset() */
\r
886 a6.sin6_port = p_htons(localport);
\r
890 a.sin_family = AF_INET;
\r
891 a.sin_addr.s_addr = p_htonl(INADDR_ANY);
\r
892 a.sin_port = p_htons(localport);
\r
895 sockcode = p_bind(s, (family == AF_INET6 ?
\r
896 (struct sockaddr *) &a6 :
\r
897 (struct sockaddr *) &a),
\r
898 (family == AF_INET6 ? sizeof(a6) : sizeof(a)));
\r
900 sockcode = p_bind(s, (struct sockaddr *) &a, sizeof(a));
\r
902 if (sockcode != SOCKET_ERROR) {
\r
906 err = p_WSAGetLastError();
\r
907 if (err != WSAEADDRINUSE) /* failed, for a bad reason */
\r
911 if (localport == 0)
\r
912 break; /* we're only looping once */
\r
914 if (localport == 0)
\r
915 break; /* we might have got to the end */
\r
919 sock->error = winsock_error_string(err);
\r
924 * Connect to remote address.
\r
927 if (sock->step.ai) {
\r
928 if (family == AF_INET6) {
\r
929 a6.sin6_family = AF_INET6;
\r
930 a6.sin6_port = p_htons((short) sock->port);
\r
932 ((struct sockaddr_in6 *) sock->step.ai->ai_addr)->sin6_addr;
\r
933 a6.sin6_flowinfo = ((struct sockaddr_in6 *) sock->step.ai->ai_addr)->sin6_flowinfo;
\r
934 a6.sin6_scope_id = ((struct sockaddr_in6 *) sock->step.ai->ai_addr)->sin6_scope_id;
\r
936 a.sin_family = AF_INET;
\r
938 ((struct sockaddr_in *) sock->step.ai->ai_addr)->sin_addr;
\r
939 a.sin_port = p_htons((short) sock->port);
\r
944 assert(sock->addr->addresses && sock->step.curraddr < sock->addr->naddresses);
\r
945 a.sin_family = AF_INET;
\r
946 a.sin_addr.s_addr = p_htonl(sock->addr->addresses[sock->step.curraddr]);
\r
947 a.sin_port = p_htons((short) sock->port);
\r
950 /* Set up a select mechanism. This could be an AsyncSelect on a
\r
951 * window, or an EventSelect on an event object. */
\r
952 errstr = do_select(s, 1);
\r
954 sock->error = errstr;
\r
962 ((family == AF_INET6) ? (struct sockaddr *) &a6 :
\r
963 (struct sockaddr *) &a),
\r
964 (family == AF_INET6) ? sizeof(a6) : sizeof(a))
\r
966 p_connect(s, (struct sockaddr *) &a, sizeof(a))
\r
968 ) == SOCKET_ERROR) {
\r
969 err = p_WSAGetLastError();
\r
971 * We expect a potential EWOULDBLOCK here, because the
\r
972 * chances are the front end has done a select for
\r
973 * FD_CONNECT, so that connect() will complete
\r
976 if ( err != WSAEWOULDBLOCK ) {
\r
977 sock->error = winsock_error_string(err);
\r
982 * If we _don't_ get EWOULDBLOCK, the connect has completed
\r
983 * and we should set the socket as writable.
\r
985 sock->writable = 1;
\r
993 * No matter what happened, put the socket back in the tree.
\r
995 add234(sktree, sock);
\r
998 plug_log(sock->plug, 1, sock->addr, sock->port, sock->error, err);
\r
1002 Socket sk_new(SockAddr addr, int port, int privport, int oobinline,
\r
1003 int nodelay, int keepalive, Plug plug)
\r
1005 static const struct socket_function_table fn_table = {
\r
1011 sk_tcp_set_private_ptr,
\r
1012 sk_tcp_get_private_ptr,
\r
1013 sk_tcp_set_frozen,
\r
1014 sk_tcp_socket_error
\r
1017 Actual_Socket ret;
\r
1021 * Create Socket structure.
\r
1023 ret = snew(struct Socket_tag);
\r
1024 ret->fn = &fn_table;
\r
1025 ret->error = NULL;
\r
1027 bufchain_init(&ret->output_data);
\r
1028 ret->connected = 0; /* to start with */
\r
1029 ret->writable = 0; /* to start with */
\r
1030 ret->sending_oob = 0;
\r
1032 ret->frozen_readable = 0;
\r
1033 ret->localhost_only = 0; /* unused, but best init anyway */
\r
1034 ret->pending_error = 0;
\r
1035 ret->parent = ret->child = NULL;
\r
1036 ret->oobinline = oobinline;
\r
1037 ret->nodelay = nodelay;
\r
1038 ret->keepalive = keepalive;
\r
1039 ret->privport = privport;
\r
1042 START_STEP(ret->addr, ret->step);
\r
1043 ret->s = INVALID_SOCKET;
\r
1047 err = try_connect(ret);
\r
1048 } while (err && sk_nextaddr(ret->addr, &ret->step));
\r
1050 return (Socket) ret;
\r
1053 Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only,
\r
1054 int orig_address_family)
\r
1056 static const struct socket_function_table fn_table = {
\r
1062 sk_tcp_set_private_ptr,
\r
1063 sk_tcp_get_private_ptr,
\r
1064 sk_tcp_set_frozen,
\r
1065 sk_tcp_socket_error
\r
1076 Actual_Socket ret;
\r
1080 int address_family;
\r
1083 * Create Socket structure.
\r
1085 ret = snew(struct Socket_tag);
\r
1086 ret->fn = &fn_table;
\r
1087 ret->error = NULL;
\r
1089 bufchain_init(&ret->output_data);
\r
1090 ret->writable = 0; /* to start with */
\r
1091 ret->sending_oob = 0;
\r
1093 ret->frozen_readable = 0;
\r
1094 ret->localhost_only = local_host_only;
\r
1095 ret->pending_error = 0;
\r
1096 ret->parent = ret->child = NULL;
\r
1100 * Translate address_family from platform-independent constants
\r
1101 * into local reality.
\r
1103 address_family = (orig_address_family == ADDRTYPE_IPV4 ? AF_INET :
\r
1105 orig_address_family == ADDRTYPE_IPV6 ? AF_INET6 :
\r
1110 * Our default, if passed the `don't care' value
\r
1111 * ADDRTYPE_UNSPEC, is to listen on IPv4. If IPv6 is supported,
\r
1112 * we will also set up a second socket listening on IPv6, but
\r
1113 * the v4 one is primary since that ought to work even on
\r
1114 * non-v6-supporting systems.
\r
1116 if (address_family == AF_UNSPEC) address_family = AF_INET;
\r
1121 s = p_socket(address_family, SOCK_STREAM, 0);
\r
1124 if (s == INVALID_SOCKET) {
\r
1125 err = p_WSAGetLastError();
\r
1126 ret->error = winsock_error_string(err);
\r
1127 return (Socket) ret;
\r
1130 ret->oobinline = 0;
\r
1132 p_setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *)&on, sizeof(on));
\r
1135 if (address_family == AF_INET6) {
\r
1136 memset(&a6, 0, sizeof(a6));
\r
1137 a6.sin6_family = AF_INET6;
\r
1138 /* FIXME: srcaddr is ignored for IPv6, because I (SGT) don't
\r
1139 * know how to do it. :-)
\r
1140 * (jeroen:) saddr is specified as an address.. eg 2001:db8::1
\r
1141 * Thus we need either a parser that understands [2001:db8::1]:80
\r
1142 * style addresses and/or enhance this to understand hostnames too. */
\r
1143 if (local_host_only)
\r
1144 a6.sin6_addr = in6addr_loopback;
\r
1146 a6.sin6_addr = in6addr_any;
\r
1147 a6.sin6_port = p_htons(port);
\r
1152 a.sin_family = AF_INET;
\r
1155 * Bind to source address. First try an explicitly
\r
1156 * specified one...
\r
1159 a.sin_addr.s_addr = p_inet_addr(srcaddr);
\r
1160 if (a.sin_addr.s_addr != INADDR_NONE) {
\r
1161 /* Override localhost_only with specified listen addr. */
\r
1162 ret->localhost_only = ipv4_is_loopback(a.sin_addr);
\r
1168 * ... and failing that, go with one of the standard ones.
\r
1171 if (local_host_only)
\r
1172 a.sin_addr.s_addr = p_htonl(INADDR_LOOPBACK);
\r
1174 a.sin_addr.s_addr = p_htonl(INADDR_ANY);
\r
1177 a.sin_port = p_htons((short)port);
\r
1180 retcode = p_bind(s, (address_family == AF_INET6 ?
\r
1181 (struct sockaddr *) &a6 :
\r
1182 (struct sockaddr *) &a),
\r
1183 (address_family ==
\r
1184 AF_INET6 ? sizeof(a6) : sizeof(a)));
\r
1186 retcode = p_bind(s, (struct sockaddr *) &a, sizeof(a));
\r
1188 if (retcode != SOCKET_ERROR) {
\r
1191 err = p_WSAGetLastError();
\r
1196 ret->error = winsock_error_string(err);
\r
1197 return (Socket) ret;
\r
1201 if (p_listen(s, SOMAXCONN) == SOCKET_ERROR) {
\r
1203 ret->error = winsock_error_string(err);
\r
1204 return (Socket) ret;
\r
1207 /* Set up a select mechanism. This could be an AsyncSelect on a
\r
1208 * window, or an EventSelect on an event object. */
\r
1209 errstr = do_select(s, 1);
\r
1212 ret->error = errstr;
\r
1213 return (Socket) ret;
\r
1216 add234(sktree, ret);
\r
1220 * If we were given ADDRTYPE_UNSPEC, we must also create an
\r
1221 * IPv6 listening socket and link it to this one.
\r
1223 if (address_family == AF_INET && orig_address_family == ADDRTYPE_UNSPEC) {
\r
1224 Actual_Socket other;
\r
1226 other = (Actual_Socket) sk_newlistener(srcaddr, port, plug,
\r
1227 local_host_only, ADDRTYPE_IPV6);
\r
1230 if (!other->error) {
\r
1231 other->parent = ret;
\r
1232 ret->child = other;
\r
1240 return (Socket) ret;
\r
1243 static void sk_tcp_close(Socket sock)
\r
1245 extern char *do_select(SOCKET skt, int startup);
\r
1246 Actual_Socket s = (Actual_Socket) sock;
\r
1249 sk_tcp_close((Socket)s->child);
\r
1251 del234(sktree, s);
\r
1252 do_select(s->s, 0);
\r
1253 p_closesocket(s->s);
\r
1255 sk_addr_free(s->addr);
\r
1260 * The function which tries to send on a socket once it's deemed
\r
1263 void try_send(Actual_Socket s)
\r
1265 while (s->sending_oob || bufchain_size(&s->output_data) > 0) {
\r
1269 int len, urgentflag;
\r
1271 if (s->sending_oob) {
\r
1272 urgentflag = MSG_OOB;
\r
1273 len = s->sending_oob;
\r
1274 data = &s->oobdata;
\r
1277 bufchain_prefix(&s->output_data, &data, &len);
\r
1279 nsent = p_send(s->s, data, len, urgentflag);
\r
1280 noise_ultralight(nsent);
\r
1282 err = (nsent < 0 ? p_WSAGetLastError() : 0);
\r
1283 if ((err < WSABASEERR && nsent < 0) || err == WSAEWOULDBLOCK) {
\r
1285 * Perfectly normal: we've sent all we can for the moment.
\r
1287 * (Some WinSock send() implementations can return
\r
1288 * <0 but leave no sensible error indication -
\r
1289 * WSAGetLastError() is called but returns zero or
\r
1290 * a small number - so we check that case and treat
\r
1291 * it just like WSAEWOULDBLOCK.)
\r
1293 s->writable = FALSE;
\r
1295 } else if (nsent == 0 ||
\r
1296 err == WSAECONNABORTED || err == WSAECONNRESET) {
\r
1298 * If send() returns CONNABORTED or CONNRESET, we
\r
1299 * unfortunately can't just call plug_closing(),
\r
1300 * because it's quite likely that we're currently
\r
1301 * _in_ a call from the code we'd be calling back
\r
1302 * to, so we'd have to make half the SSH code
\r
1303 * reentrant. Instead we flag a pending error on
\r
1304 * the socket, to be dealt with (by calling
\r
1305 * plug_closing()) at some suitable future moment.
\r
1307 s->pending_error = err;
\r
1310 /* We're inside the Windows frontend here, so we know
\r
1311 * that the frontend handle is unnecessary. */
\r
1312 logevent(NULL, winsock_error_string(err));
\r
1313 fatalbox("%s", winsock_error_string(err));
\r
1316 if (s->sending_oob) {
\r
1317 if (nsent < len) {
\r
1318 memmove(s->oobdata, s->oobdata+nsent, len-nsent);
\r
1319 s->sending_oob = len - nsent;
\r
1321 s->sending_oob = 0;
\r
1324 bufchain_consume(&s->output_data, nsent);
\r
1330 static int sk_tcp_write(Socket sock, const char *buf, int len)
\r
1332 Actual_Socket s = (Actual_Socket) sock;
\r
1335 * Add the data to the buffer list on the socket.
\r
1337 bufchain_add(&s->output_data, buf, len);
\r
1340 * Now try sending from the start of the buffer list.
\r
1345 return bufchain_size(&s->output_data);
\r
1348 static int sk_tcp_write_oob(Socket sock, const char *buf, int len)
\r
1350 Actual_Socket s = (Actual_Socket) sock;
\r
1353 * Replace the buffer list on the socket with the data.
\r
1355 bufchain_clear(&s->output_data);
\r
1356 assert(len <= sizeof(s->oobdata));
\r
1357 memcpy(s->oobdata, buf, len);
\r
1358 s->sending_oob = len;
\r
1361 * Now try sending from the start of the buffer list.
\r
1366 return s->sending_oob;
\r
1369 int select_result(WPARAM wParam, LPARAM lParam)
\r
1373 char buf[20480]; /* nice big buffer for plenty of speed */
\r
1377 /* wParam is the socket itself */
\r
1380 return 1; /* boggle */
\r
1382 s = find234(sktree, (void *) wParam, cmpforsearch);
\r
1384 return 1; /* boggle */
\r
1386 if ((err = WSAGETSELECTERROR(lParam)) != 0) {
\r
1388 * An error has occurred on this socket. Pass it to the
\r
1392 plug_log(s->plug, 1, s->addr, s->port,
\r
1393 winsock_error_string(err), err);
\r
1394 while (s->addr && sk_nextaddr(s->addr, &s->step)) {
\r
1395 err = try_connect(s);
\r
1399 return plug_closing(s->plug, winsock_error_string(err), err, 0);
\r
1404 noise_ultralight(lParam);
\r
1406 switch (WSAGETSELECTEVENT(lParam)) {
\r
1408 s->connected = s->writable = 1;
\r
1410 * Once a socket is connected, we can stop falling
\r
1411 * back through the candidate addresses to connect
\r
1415 sk_addr_free(s->addr);
\r
1420 /* In the case the socket is still frozen, we don't even bother */
\r
1422 s->frozen_readable = 1;
\r
1427 * We have received data on the socket. For an oobinline
\r
1428 * socket, this might be data _before_ an urgent pointer,
\r
1429 * in which case we send it to the back end with type==1
\r
1430 * (data prior to urgent).
\r
1432 if (s->oobinline) {
\r
1434 p_ioctlsocket(s->s, SIOCATMARK, &atmark);
\r
1436 * Avoid checking the return value from ioctlsocket(),
\r
1437 * on the grounds that some WinSock wrappers don't
\r
1438 * support it. If it does nothing, we get atmark==1,
\r
1439 * which is equivalent to `no OOB pending', so the
\r
1440 * effect will be to non-OOB-ify any OOB data.
\r
1445 ret = p_recv(s->s, buf, sizeof(buf), 0);
\r
1446 noise_ultralight(ret);
\r
1448 err = p_WSAGetLastError();
\r
1449 if (err == WSAEWOULDBLOCK) {
\r
1454 return plug_closing(s->plug, winsock_error_string(err), err,
\r
1456 } else if (0 == ret) {
\r
1457 return plug_closing(s->plug, NULL, 0, 0);
\r
1459 return plug_receive(s->plug, atmark ? 0 : 1, buf, ret);
\r
1464 * This will only happen on a non-oobinline socket. It
\r
1465 * indicates that we can immediately perform an OOB read
\r
1466 * and get back OOB data, which we will send to the back
\r
1467 * end with type==2 (urgent data).
\r
1469 ret = p_recv(s->s, buf, sizeof(buf), MSG_OOB);
\r
1470 noise_ultralight(ret);
\r
1472 char *str = (ret == 0 ? "Internal networking trouble" :
\r
1473 winsock_error_string(p_WSAGetLastError()));
\r
1474 /* We're inside the Windows frontend here, so we know
\r
1475 * that the frontend handle is unnecessary. */
\r
1476 logevent(NULL, str);
\r
1477 fatalbox("%s", str);
\r
1479 return plug_receive(s->plug, 2, buf, ret);
\r
1484 int bufsize_before, bufsize_after;
\r
1486 bufsize_before = s->sending_oob + bufchain_size(&s->output_data);
\r
1488 bufsize_after = s->sending_oob + bufchain_size(&s->output_data);
\r
1489 if (bufsize_after < bufsize_before)
\r
1490 plug_sent(s->plug, bufsize_after);
\r
1494 /* Signal a close on the socket. First read any outstanding data. */
\r
1497 ret = p_recv(s->s, buf, sizeof(buf), 0);
\r
1499 err = p_WSAGetLastError();
\r
1500 if (err == WSAEWOULDBLOCK)
\r
1502 return plug_closing(s->plug, winsock_error_string(err),
\r
1506 open &= plug_receive(s->plug, 0, buf, ret);
\r
1508 open &= plug_closing(s->plug, NULL, 0, 0);
\r
1510 } while (ret > 0);
\r
1515 struct sockaddr_in isa;
\r
1517 struct sockaddr_storage isa;
\r
1519 int addrlen = sizeof(isa);
\r
1520 SOCKET t; /* socket of connection */
\r
1522 memset(&isa, 0, sizeof(isa));
\r
1524 t = p_accept(s->s,(struct sockaddr *)&isa,&addrlen);
\r
1525 if (t == INVALID_SOCKET)
\r
1527 err = p_WSAGetLastError();
\r
1528 if (err == WSATRY_AGAIN)
\r
1532 if (isa.ss_family == AF_INET &&
\r
1533 s->localhost_only &&
\r
1534 !ipv4_is_local_addr(((struct sockaddr_in *)&isa)->sin_addr))
\r
1536 if (s->localhost_only && !ipv4_is_local_addr(isa.sin_addr))
\r
1539 p_closesocket(t); /* dodgy WinSock let nonlocal through */
\r
1540 } else if (plug_accepting(s->plug, (void*)t)) {
\r
1541 p_closesocket(t); /* denied or error */
\r
1550 * Deal with socket errors detected in try_send().
\r
1552 void net_pending_errors(void)
\r
1558 * This might be a fiddly business, because it's just possible
\r
1559 * that handling a pending error on one socket might cause
\r
1560 * others to be closed. (I can't think of any reason this might
\r
1561 * happen in current SSH implementation, but to maintain
\r
1562 * generality of this network layer I'll assume the worst.)
\r
1564 * So what we'll do is search the socket list for _one_ socket
\r
1565 * with a pending error, and then handle it, and then search
\r
1566 * the list again _from the beginning_. Repeat until we make a
\r
1567 * pass with no socket errors present. That way we are
\r
1568 * protected against the socket list changing under our feet.
\r
1572 for (i = 0; (s = index234(sktree, i)) != NULL; i++) {
\r
1573 if (s->pending_error) {
\r
1575 * An error has occurred on this socket. Pass it to the
\r
1578 plug_closing(s->plug,
\r
1579 winsock_error_string(s->pending_error),
\r
1580 s->pending_error, 0);
\r
1588 * Each socket abstraction contains a `void *' private field in
\r
1589 * which the client can keep state.
\r
1591 static void sk_tcp_set_private_ptr(Socket sock, void *ptr)
\r
1593 Actual_Socket s = (Actual_Socket) sock;
\r
1594 s->private_ptr = ptr;
\r
1597 static void *sk_tcp_get_private_ptr(Socket sock)
\r
1599 Actual_Socket s = (Actual_Socket) sock;
\r
1600 return s->private_ptr;
\r
1604 * Special error values are returned from sk_namelookup and sk_new
\r
1605 * if there's a problem. These functions extract an error message,
\r
1606 * or return NULL if there's no problem.
\r
1608 const char *sk_addr_error(SockAddr addr)
\r
1610 return addr->error;
\r
1612 static const char *sk_tcp_socket_error(Socket sock)
\r
1614 Actual_Socket s = (Actual_Socket) sock;
\r
1618 static void sk_tcp_set_frozen(Socket sock, int is_frozen)
\r
1620 Actual_Socket s = (Actual_Socket) sock;
\r
1621 if (s->frozen == is_frozen)
\r
1623 s->frozen = is_frozen;
\r
1625 do_select(s->s, 1);
\r
1626 if (s->frozen_readable) {
\r
1628 p_recv(s->s, &c, 1, MSG_PEEK);
\r
1631 s->frozen_readable = 0;
\r
1634 void socket_reselect_all(void)
\r
1639 for (i = 0; (s = index234(sktree, i)) != NULL; i++) {
\r
1641 do_select(s->s, 1);
\r
1646 * For Plink: enumerate all sockets currently active.
\r
1648 SOCKET first_socket(int *state)
\r
1652 s = index234(sktree, (*state)++);
\r
1653 return s ? s->s : INVALID_SOCKET;
\r
1656 SOCKET next_socket(int *state)
\r
1658 Actual_Socket s = index234(sktree, (*state)++);
\r
1659 return s ? s->s : INVALID_SOCKET;
\r
1662 extern int socket_writable(SOCKET skt)
\r
1664 Actual_Socket s = find234(sktree, (void *)skt, cmpforsearch);
\r
1667 return bufchain_size(&s->output_data) > 0;
\r
1672 int net_service_lookup(char *service)
\r
1674 struct servent *se;
\r
1675 se = p_getservbyname(service, NULL);
\r
1677 return p_ntohs(se->s_port);
\r
1682 char *get_hostname(void)
\r
1685 char *hostname = NULL;
\r
1688 hostname = sresize(hostname, len, char);
\r
1689 if (p_gethostname(hostname, len) < 0) {
\r
1694 } while (strlen(hostname) >= (size_t)(len-1));
\r
1698 SockAddr platform_get_x11_unix_address(const char *display, int displaynum,
\r
1699 char **canonicalname)
\r
1701 SockAddr ret = snew(struct SockAddr_tag);
\r
1702 memset(ret, 0, sizeof(struct SockAddr_tag));
\r
1703 ret->error = "unix sockets not supported on this platform";
\r
1704 ret->refcount = 1;
\r