2f75bae1 |
1 | /* |
2 | * Windows networking abstraction. |
c4d8e107 |
3 | * |
05581745 |
4 | * For the IPv6 code in here I am indebted to Jeroen Massar and |
5 | * unfix.org. |
2f75bae1 |
6 | */ |
7 | |
2f75bae1 |
8 | #include <stdio.h> |
49bad831 |
9 | #include <stdlib.h> |
5471d09a |
10 | #include <assert.h> |
2f75bae1 |
11 | |
7e78000d |
12 | #define DEFINE_PLUG_METHOD_MACROS |
2f75bae1 |
13 | #include "putty.h" |
14 | #include "network.h" |
15 | #include "tree234.h" |
16 | |
7440fd44 |
17 | #include <ws2tcpip.h> |
05581745 |
18 | |
19 | #ifndef NO_IPV6 |
20 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
21 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
7440fd44 |
22 | #endif |
23 | |
6ee9b735 |
24 | #define ipv4_is_loopback(addr) \ |
7440fd44 |
25 | ((p_ntohl(addr.s_addr) & 0xFF000000L) == 0x7F000000L) |
6ee9b735 |
26 | |
ae400b95 |
27 | /* |
28 | * We used to typedef struct Socket_tag *Socket. |
29 | * |
30 | * Since we have made the networking abstraction slightly more |
31 | * abstract, Socket no longer means a tcp socket (it could mean |
32 | * an ssl socket). So now we must use Actual_Socket when we know |
33 | * we are talking about a tcp socket. |
34 | */ |
35 | typedef struct Socket_tag *Actual_Socket; |
36 | |
facf7568 |
37 | /* |
38 | * Mutable state that goes with a SockAddr: stores information |
39 | * about where in the list of candidate IP(v*) addresses we've |
40 | * currently got to. |
41 | */ |
42 | typedef struct SockAddrStep_tag SockAddrStep; |
43 | struct SockAddrStep_tag { |
44 | #ifndef NO_IPV6 |
45 | struct addrinfo *ai; /* steps along addr->ais */ |
46 | #endif |
47 | int curraddr; |
48 | }; |
49 | |
2f75bae1 |
50 | struct Socket_tag { |
c85623f9 |
51 | const struct socket_function_table *fn; |
7e78000d |
52 | /* the above variable absolutely *must* be the first in this structure */ |
2f75bae1 |
53 | char *error; |
54 | SOCKET s; |
7e78000d |
55 | Plug plug; |
2f75bae1 |
56 | void *private_ptr; |
5471d09a |
57 | bufchain output_data; |
3ad9d396 |
58 | int connected; |
2f75bae1 |
59 | int writable; |
5471d09a |
60 | int frozen; /* this causes readability notifications to be ignored */ |
61 | int frozen_readable; /* this means we missed at least one readability |
62 | * notification while we were frozen */ |
bc4802a1 |
63 | int localhost_only; /* for listening sockets */ |
5471d09a |
64 | char oobdata[1]; |
1ad4eb6f |
65 | int sending_oob; |
7555d6a5 |
66 | int oobinline, nodelay, keepalive, privport; |
67 | SockAddr addr; |
facf7568 |
68 | SockAddrStep step; |
7555d6a5 |
69 | int port; |
7732d38a |
70 | int pending_error; /* in case send() returns error */ |
ae400b95 |
71 | /* |
72 | * We sometimes need pairs of Socket structures to be linked: |
73 | * if we are listening on the same IPv6 and v4 port, for |
74 | * example. So here we define `parent' and `child' pointers to |
75 | * track this link. |
76 | */ |
77 | Actual_Socket parent, child; |
2f75bae1 |
78 | }; |
79 | |
80 | struct SockAddr_tag { |
5025a993 |
81 | int refcount; |
2f75bae1 |
82 | char *error; |
facf7568 |
83 | int resolved; |
05581745 |
84 | #ifndef NO_IPV6 |
7555d6a5 |
85 | struct addrinfo *ais; /* Addresses IPv6 style. */ |
c4d8e107 |
86 | #endif |
7555d6a5 |
87 | unsigned long *addresses; /* Addresses IPv4 style. */ |
facf7568 |
88 | int naddresses; |
b7a189f3 |
89 | char hostname[512]; /* Store an unresolved host name. */ |
2f75bae1 |
90 | }; |
91 | |
facf7568 |
92 | /* |
93 | * Which address family this address belongs to. AF_INET for IPv4; |
94 | * AF_INET6 for IPv6; AF_UNSPEC indicates that name resolution has |
95 | * not been done and a simple host name is held in this SockAddr |
96 | * structure. |
97 | */ |
98 | #ifndef NO_IPV6 |
99 | #define SOCKADDR_FAMILY(addr, step) \ |
100 | (!(addr)->resolved ? AF_UNSPEC : \ |
101 | (step).ai ? (step).ai->ai_family : AF_INET) |
102 | #else |
103 | #define SOCKADDR_FAMILY(addr, step) \ |
104 | (!(addr)->resolved ? AF_UNSPEC : AF_INET) |
105 | #endif |
106 | |
107 | /* |
108 | * Start a SockAddrStep structure to step through multiple |
109 | * addresses. |
110 | */ |
111 | #ifndef NO_IPV6 |
112 | #define START_STEP(addr, step) \ |
113 | ((step).ai = (addr)->ais, (step).curraddr = 0) |
114 | #else |
115 | #define START_STEP(addr, step) \ |
116 | ((step).curraddr = 0) |
117 | #endif |
118 | |
2f75bae1 |
119 | static tree234 *sktree; |
120 | |
32874aea |
121 | static int cmpfortree(void *av, void *bv) |
122 | { |
123 | Actual_Socket a = (Actual_Socket) av, b = (Actual_Socket) bv; |
124 | unsigned long as = (unsigned long) a->s, bs = (unsigned long) b->s; |
125 | if (as < bs) |
126 | return -1; |
127 | if (as > bs) |
128 | return +1; |
b34544ba |
129 | if (a < b) |
130 | return -1; |
131 | if (a > b) |
132 | return +1; |
2f75bae1 |
133 | return 0; |
134 | } |
135 | |
32874aea |
136 | static int cmpforsearch(void *av, void *bv) |
137 | { |
138 | Actual_Socket b = (Actual_Socket) bv; |
139 | unsigned long as = (unsigned long) av, bs = (unsigned long) b->s; |
140 | if (as < bs) |
141 | return -1; |
142 | if (as > bs) |
143 | return +1; |
2f75bae1 |
144 | return 0; |
145 | } |
146 | |
7440fd44 |
147 | #define NOTHING |
148 | #define DECL_WINSOCK_FUNCTION(linkage, rettype, name, params) \ |
149 | typedef rettype (WINAPI *t_##name) params; \ |
150 | linkage t_##name p_##name |
7555d6a5 |
151 | #define GET_WINSOCK_FUNCTION(module, name) \ |
c9ef99df |
152 | p_##name = module ? (t_##name) GetProcAddress(module, #name) : NULL |
7440fd44 |
153 | |
154 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAAsyncSelect, |
155 | (SOCKET, HWND, u_int, long)); |
156 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAEventSelect, (SOCKET, WSAEVENT, long)); |
157 | DECL_WINSOCK_FUNCTION(NOTHING, int, select, |
158 | (int, fd_set FAR *, fd_set FAR *, |
159 | fd_set FAR *, const struct timeval FAR *)); |
160 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAGetLastError, (void)); |
161 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAEnumNetworkEvents, |
162 | (SOCKET, WSAEVENT, LPWSANETWORKEVENTS)); |
163 | DECL_WINSOCK_FUNCTION(static, int, WSAStartup, (WORD, LPWSADATA)); |
164 | DECL_WINSOCK_FUNCTION(static, int, WSACleanup, (void)); |
165 | DECL_WINSOCK_FUNCTION(static, int, closesocket, (SOCKET)); |
166 | DECL_WINSOCK_FUNCTION(static, u_long, ntohl, (u_long)); |
167 | DECL_WINSOCK_FUNCTION(static, u_long, htonl, (u_long)); |
168 | DECL_WINSOCK_FUNCTION(static, u_short, htons, (u_short)); |
169 | DECL_WINSOCK_FUNCTION(static, u_short, ntohs, (u_short)); |
170 | DECL_WINSOCK_FUNCTION(static, struct hostent FAR *, gethostbyname, |
171 | (const char FAR *)); |
172 | DECL_WINSOCK_FUNCTION(static, struct servent FAR *, getservbyname, |
173 | (const char FAR *, const char FAR *)); |
174 | DECL_WINSOCK_FUNCTION(static, unsigned long, inet_addr, (const char FAR *)); |
175 | DECL_WINSOCK_FUNCTION(static, char FAR *, inet_ntoa, (struct in_addr)); |
176 | DECL_WINSOCK_FUNCTION(static, int, connect, |
177 | (SOCKET, const struct sockaddr FAR *, int)); |
178 | DECL_WINSOCK_FUNCTION(static, int, bind, |
179 | (SOCKET, const struct sockaddr FAR *, int)); |
180 | DECL_WINSOCK_FUNCTION(static, int, setsockopt, |
181 | (SOCKET, int, int, const char FAR *, int)); |
182 | DECL_WINSOCK_FUNCTION(static, SOCKET, socket, (int, int, int)); |
183 | DECL_WINSOCK_FUNCTION(static, int, listen, (SOCKET, int)); |
184 | DECL_WINSOCK_FUNCTION(static, int, send, (SOCKET, const char FAR *, int, int)); |
185 | DECL_WINSOCK_FUNCTION(static, int, ioctlsocket, |
186 | (SOCKET, long, u_long FAR *)); |
187 | DECL_WINSOCK_FUNCTION(static, SOCKET, accept, |
188 | (SOCKET, struct sockaddr FAR *, int FAR *)); |
189 | DECL_WINSOCK_FUNCTION(static, int, recv, (SOCKET, char FAR *, int, int)); |
a143ea0a |
190 | DECL_WINSOCK_FUNCTION(static, int, WSAIoctl, |
191 | (SOCKET, DWORD, LPVOID, DWORD, LPVOID, DWORD, |
192 | LPDWORD, LPWSAOVERLAPPED, |
193 | LPWSAOVERLAPPED_COMPLETION_ROUTINE)); |
7555d6a5 |
194 | #ifndef NO_IPV6 |
195 | DECL_WINSOCK_FUNCTION(static, int, getaddrinfo, |
196 | (const char *nodename, const char *servname, |
197 | const struct addrinfo *hints, struct addrinfo **res)); |
198 | DECL_WINSOCK_FUNCTION(static, void, freeaddrinfo, (struct addrinfo *res)); |
199 | DECL_WINSOCK_FUNCTION(static, int, getnameinfo, |
200 | (const struct sockaddr FAR * sa, socklen_t salen, |
201 | char FAR * host, size_t hostlen, char FAR * serv, |
202 | size_t servlen, int flags)); |
c9ef99df |
203 | DECL_WINSOCK_FUNCTION(static, char *, gai_strerror, (int ecode)); |
204 | DECL_WINSOCK_FUNCTION(static, int, WSAAddressToStringA, |
205 | (LPSOCKADDR, DWORD, LPWSAPROTOCOL_INFO, |
206 | LPTSTR, LPDWORD)); |
7555d6a5 |
207 | #endif |
7440fd44 |
208 | |
c9ef99df |
209 | static HMODULE winsock_module = NULL; |
210 | static WSADATA wsadata; |
7555d6a5 |
211 | #ifndef NO_IPV6 |
c9ef99df |
212 | static HMODULE winsock2_module = NULL; |
213 | static HMODULE wship6_module = NULL; |
7555d6a5 |
214 | #endif |
7440fd44 |
215 | |
c9ef99df |
216 | int sk_startup(int hi, int lo) |
32874aea |
217 | { |
7440fd44 |
218 | WORD winsock_ver; |
7440fd44 |
219 | |
c9ef99df |
220 | winsock_ver = MAKEWORD(hi, lo); |
221 | |
222 | if (p_WSAStartup(winsock_ver, &wsadata)) { |
223 | return FALSE; |
224 | } |
225 | |
226 | if (LOBYTE(wsadata.wVersion) != LOBYTE(winsock_ver)) { |
227 | return FALSE; |
228 | } |
229 | |
230 | #ifdef NET_SETUP_DIAGNOSTICS |
231 | { |
232 | char buf[80]; |
233 | sprintf(buf, "Using WinSock %d.%d", hi, lo); |
234 | logevent(NULL, buf); |
235 | } |
236 | #endif |
237 | return TRUE; |
238 | } |
239 | |
240 | void sk_init(void) |
241 | { |
b72210b4 |
242 | #ifndef NO_IPV6 |
243 | winsock2_module = |
244 | #endif |
245 | winsock_module = LoadLibrary("WS2_32.DLL"); |
7440fd44 |
246 | if (!winsock_module) { |
247 | winsock_module = LoadLibrary("WSOCK32.DLL"); |
7440fd44 |
248 | } |
249 | if (!winsock_module) |
250 | fatalbox("Unable to load any WinSock library"); |
251 | |
7555d6a5 |
252 | #ifndef NO_IPV6 |
c9ef99df |
253 | /* Check if we have getaddrinfo in Winsock */ |
254 | if (GetProcAddress(winsock_module, "getaddrinfo") != NULL) { |
255 | #ifdef NET_SETUP_DIAGNOSTICS |
256 | logevent(NULL, "Native WinSock IPv6 support detected"); |
257 | #endif |
258 | GET_WINSOCK_FUNCTION(winsock_module, getaddrinfo); |
259 | GET_WINSOCK_FUNCTION(winsock_module, freeaddrinfo); |
260 | GET_WINSOCK_FUNCTION(winsock_module, getnameinfo); |
261 | GET_WINSOCK_FUNCTION(winsock_module, gai_strerror); |
262 | } else { |
263 | /* Fall back to wship6.dll for Windows 2000 */ |
264 | wship6_module = LoadLibrary("wship6.dll"); |
265 | if (wship6_module) { |
266 | #ifdef NET_SETUP_DIAGNOSTICS |
267 | logevent(NULL, "WSH IPv6 support detected"); |
268 | #endif |
269 | GET_WINSOCK_FUNCTION(wship6_module, getaddrinfo); |
270 | GET_WINSOCK_FUNCTION(wship6_module, freeaddrinfo); |
271 | GET_WINSOCK_FUNCTION(wship6_module, getnameinfo); |
272 | GET_WINSOCK_FUNCTION(wship6_module, gai_strerror); |
273 | } else { |
274 | #ifdef NET_SETUP_DIAGNOSTICS |
275 | logevent(NULL, "No IPv6 support detected"); |
276 | #endif |
277 | } |
7555d6a5 |
278 | } |
c9ef99df |
279 | GET_WINSOCK_FUNCTION(winsock2_module, WSAAddressToStringA); |
280 | #else |
281 | #ifdef NET_SETUP_DIAGNOSTICS |
282 | logevent(NULL, "PuTTY was built without IPv6 support"); |
283 | #endif |
7555d6a5 |
284 | #endif |
285 | |
286 | GET_WINSOCK_FUNCTION(winsock_module, WSAAsyncSelect); |
287 | GET_WINSOCK_FUNCTION(winsock_module, WSAEventSelect); |
288 | GET_WINSOCK_FUNCTION(winsock_module, select); |
289 | GET_WINSOCK_FUNCTION(winsock_module, WSAGetLastError); |
290 | GET_WINSOCK_FUNCTION(winsock_module, WSAEnumNetworkEvents); |
291 | GET_WINSOCK_FUNCTION(winsock_module, WSAStartup); |
292 | GET_WINSOCK_FUNCTION(winsock_module, WSACleanup); |
293 | GET_WINSOCK_FUNCTION(winsock_module, closesocket); |
294 | GET_WINSOCK_FUNCTION(winsock_module, ntohl); |
295 | GET_WINSOCK_FUNCTION(winsock_module, htonl); |
296 | GET_WINSOCK_FUNCTION(winsock_module, htons); |
297 | GET_WINSOCK_FUNCTION(winsock_module, ntohs); |
298 | GET_WINSOCK_FUNCTION(winsock_module, gethostbyname); |
299 | GET_WINSOCK_FUNCTION(winsock_module, getservbyname); |
300 | GET_WINSOCK_FUNCTION(winsock_module, inet_addr); |
301 | GET_WINSOCK_FUNCTION(winsock_module, inet_ntoa); |
302 | GET_WINSOCK_FUNCTION(winsock_module, connect); |
303 | GET_WINSOCK_FUNCTION(winsock_module, bind); |
304 | GET_WINSOCK_FUNCTION(winsock_module, setsockopt); |
305 | GET_WINSOCK_FUNCTION(winsock_module, socket); |
306 | GET_WINSOCK_FUNCTION(winsock_module, listen); |
307 | GET_WINSOCK_FUNCTION(winsock_module, send); |
308 | GET_WINSOCK_FUNCTION(winsock_module, ioctlsocket); |
309 | GET_WINSOCK_FUNCTION(winsock_module, accept); |
310 | GET_WINSOCK_FUNCTION(winsock_module, recv); |
311 | GET_WINSOCK_FUNCTION(winsock_module, WSAIoctl); |
7440fd44 |
312 | |
c9ef99df |
313 | /* Try to get the best WinSock version we can get */ |
314 | if (!sk_startup(2,2) && |
315 | !sk_startup(2,0) && |
316 | !sk_startup(1,1)) { |
7440fd44 |
317 | fatalbox("Unable to initialise WinSock"); |
318 | } |
7440fd44 |
319 | |
2f75bae1 |
320 | sktree = newtree234(cmpfortree); |
321 | } |
322 | |
93b581bd |
323 | void sk_cleanup(void) |
324 | { |
325 | Actual_Socket s; |
326 | int i; |
327 | |
328 | if (sktree) { |
329 | for (i = 0; (s = index234(sktree, i)) != NULL; i++) { |
7440fd44 |
330 | p_closesocket(s->s); |
93b581bd |
331 | } |
679539d7 |
332 | freetree234(sktree); |
333 | sktree = NULL; |
93b581bd |
334 | } |
7440fd44 |
335 | |
336 | p_WSACleanup(); |
337 | if (winsock_module) |
338 | FreeLibrary(winsock_module); |
635d063d |
339 | #ifndef NO_IPV6 |
7555d6a5 |
340 | if (wship6_module) |
341 | FreeLibrary(wship6_module); |
635d063d |
342 | #endif |
93b581bd |
343 | } |
344 | |
32874aea |
345 | char *winsock_error_string(int error) |
346 | { |
e74fbad9 |
347 | switch (error) { |
32874aea |
348 | case WSAEACCES: |
349 | return "Network error: Permission denied"; |
350 | case WSAEADDRINUSE: |
351 | return "Network error: Address already in use"; |
352 | case WSAEADDRNOTAVAIL: |
353 | return "Network error: Cannot assign requested address"; |
354 | case WSAEAFNOSUPPORT: |
355 | return |
356 | "Network error: Address family not supported by protocol family"; |
357 | case WSAEALREADY: |
358 | return "Network error: Operation already in progress"; |
359 | case WSAECONNABORTED: |
360 | return "Network error: Software caused connection abort"; |
361 | case WSAECONNREFUSED: |
362 | return "Network error: Connection refused"; |
363 | case WSAECONNRESET: |
364 | return "Network error: Connection reset by peer"; |
365 | case WSAEDESTADDRREQ: |
366 | return "Network error: Destination address required"; |
367 | case WSAEFAULT: |
368 | return "Network error: Bad address"; |
369 | case WSAEHOSTDOWN: |
370 | return "Network error: Host is down"; |
371 | case WSAEHOSTUNREACH: |
372 | return "Network error: No route to host"; |
373 | case WSAEINPROGRESS: |
374 | return "Network error: Operation now in progress"; |
375 | case WSAEINTR: |
376 | return "Network error: Interrupted function call"; |
377 | case WSAEINVAL: |
378 | return "Network error: Invalid argument"; |
379 | case WSAEISCONN: |
380 | return "Network error: Socket is already connected"; |
381 | case WSAEMFILE: |
382 | return "Network error: Too many open files"; |
383 | case WSAEMSGSIZE: |
384 | return "Network error: Message too long"; |
385 | case WSAENETDOWN: |
386 | return "Network error: Network is down"; |
387 | case WSAENETRESET: |
388 | return "Network error: Network dropped connection on reset"; |
389 | case WSAENETUNREACH: |
390 | return "Network error: Network is unreachable"; |
391 | case WSAENOBUFS: |
392 | return "Network error: No buffer space available"; |
393 | case WSAENOPROTOOPT: |
394 | return "Network error: Bad protocol option"; |
395 | case WSAENOTCONN: |
396 | return "Network error: Socket is not connected"; |
397 | case WSAENOTSOCK: |
398 | return "Network error: Socket operation on non-socket"; |
399 | case WSAEOPNOTSUPP: |
400 | return "Network error: Operation not supported"; |
401 | case WSAEPFNOSUPPORT: |
402 | return "Network error: Protocol family not supported"; |
403 | case WSAEPROCLIM: |
404 | return "Network error: Too many processes"; |
405 | case WSAEPROTONOSUPPORT: |
406 | return "Network error: Protocol not supported"; |
407 | case WSAEPROTOTYPE: |
408 | return "Network error: Protocol wrong type for socket"; |
409 | case WSAESHUTDOWN: |
410 | return "Network error: Cannot send after socket shutdown"; |
411 | case WSAESOCKTNOSUPPORT: |
412 | return "Network error: Socket type not supported"; |
413 | case WSAETIMEDOUT: |
414 | return "Network error: Connection timed out"; |
415 | case WSAEWOULDBLOCK: |
416 | return "Network error: Resource temporarily unavailable"; |
417 | case WSAEDISCON: |
418 | return "Network error: Graceful shutdown in progress"; |
419 | default: |
420 | return "Unknown network error"; |
e74fbad9 |
421 | } |
422 | } |
423 | |
05581745 |
424 | SockAddr sk_namelookup(const char *host, char **canonicalname, |
425 | int address_family) |
c4d8e107 |
426 | { |
3d88e64d |
427 | SockAddr ret = snew(struct SockAddr_tag); |
2f75bae1 |
428 | unsigned long a; |
c4d8e107 |
429 | struct hostent *h = NULL; |
6e1ebb76 |
430 | char realhost[8192]; |
facf7568 |
431 | int hint_family; |
38bd69cd |
432 | int err; |
2f75bae1 |
433 | |
facf7568 |
434 | /* Default to IPv4. */ |
435 | hint_family = (address_family == ADDRTYPE_IPV4 ? AF_INET : |
05581745 |
436 | #ifndef NO_IPV6 |
437 | address_family == ADDRTYPE_IPV6 ? AF_INET6 : |
438 | #endif |
439 | AF_UNSPEC); |
facf7568 |
440 | |
441 | /* Clear the structure and default to IPv4. */ |
442 | memset(ret, 0, sizeof(struct SockAddr_tag)); |
1822a5e7 |
443 | #ifndef NO_IPV6 |
facf7568 |
444 | ret->ais = NULL; |
1822a5e7 |
445 | #endif |
2cd38976 |
446 | ret->addresses = NULL; |
facf7568 |
447 | ret->resolved = FALSE; |
5025a993 |
448 | ret->refcount = 1; |
6e1ebb76 |
449 | *realhost = '\0'; |
c4d8e107 |
450 | |
7440fd44 |
451 | if ((a = p_inet_addr(host)) == (unsigned long) INADDR_NONE) { |
05581745 |
452 | #ifndef NO_IPV6 |
c4d8e107 |
453 | /* |
7555d6a5 |
454 | * Use getaddrinfo when it's available |
c4d8e107 |
455 | */ |
7555d6a5 |
456 | if (p_getaddrinfo) { |
38bd69cd |
457 | struct addrinfo hints; |
c9ef99df |
458 | #ifdef NET_SETUP_DIAGNOSTICS |
459 | logevent(NULL, "Using getaddrinfo() for resolving"); |
460 | #endif |
38bd69cd |
461 | memset(&hints, 0, sizeof(hints)); |
facf7568 |
462 | hints.ai_family = hint_family; |
ac0c8510 |
463 | hints.ai_flags = AI_CANONNAME; |
7555d6a5 |
464 | if ((err = p_getaddrinfo(host, NULL, &hints, &ret->ais)) == 0) |
facf7568 |
465 | ret->resolved = TRUE; |
32874aea |
466 | } else |
c4d8e107 |
467 | #endif |
32874aea |
468 | { |
c9ef99df |
469 | #ifdef NET_SETUP_DIAGNOSTICS |
470 | logevent(NULL, "Using gethostbyname() for resolving"); |
471 | #endif |
c4d8e107 |
472 | /* |
473 | * Otherwise use the IPv4-only gethostbyname... |
05581745 |
474 | * (NOTE: we don't use gethostbyname as a fallback!) |
c4d8e107 |
475 | */ |
38bd69cd |
476 | if ( (h = p_gethostbyname(host)) ) |
facf7568 |
477 | ret->resolved = TRUE; |
38bd69cd |
478 | else |
479 | err = p_WSAGetLastError(); |
c4d8e107 |
480 | } |
c4d8e107 |
481 | |
facf7568 |
482 | if (!ret->resolved) { |
c4d8e107 |
483 | ret->error = (err == WSAENETDOWN ? "Network is down" : |
38bd69cd |
484 | err == WSAHOST_NOT_FOUND ? "Host does not exist" : |
485 | err == WSATRY_AGAIN ? "Host not found" : |
05581745 |
486 | #ifndef NO_IPV6 |
c9ef99df |
487 | p_getaddrinfo&&p_gai_strerror ? p_gai_strerror(err) : |
c4d8e107 |
488 | #endif |
489 | "gethostbyname: unknown error"); |
32874aea |
490 | } else { |
c4d8e107 |
491 | ret->error = NULL; |
492 | |
05581745 |
493 | #ifndef NO_IPV6 |
c4d8e107 |
494 | /* If we got an address info use that... */ |
facf7568 |
495 | if (ret->ais) { |
c4d8e107 |
496 | /* Are we in IPv4 fallback mode? */ |
497 | /* We put the IPv4 address into the a variable so we can further-on use the IPv4 code... */ |
facf7568 |
498 | if (ret->ais->ai_family == AF_INET) |
32874aea |
499 | memcpy(&a, |
facf7568 |
500 | (char *) &((SOCKADDR_IN *) ret->ais-> |
32874aea |
501 | ai_addr)->sin_addr, sizeof(a)); |
c4d8e107 |
502 | |
facf7568 |
503 | if (ret->ais->ai_canonname) |
504 | strncpy(realhost, ret->ais->ai_canonname, lenof(realhost)); |
ac0c8510 |
505 | else |
506 | strncpy(realhost, host, lenof(realhost)); |
c4d8e107 |
507 | } |
508 | /* We used the IPv4-only gethostbyname()... */ |
509 | else |
c4d8e107 |
510 | #endif |
32874aea |
511 | { |
7555d6a5 |
512 | int n; |
513 | for (n = 0; h->h_addr_list[n]; n++); |
514 | ret->addresses = snewn(n, unsigned long); |
515 | ret->naddresses = n; |
516 | for (n = 0; n < ret->naddresses; n++) { |
517 | memcpy(&a, h->h_addr_list[n], sizeof(a)); |
518 | ret->addresses[n] = p_ntohl(a); |
519 | } |
c4d8e107 |
520 | memcpy(&a, h->h_addr, sizeof(a)); |
521 | /* This way we are always sure the h->h_name is valid :) */ |
6e1ebb76 |
522 | strncpy(realhost, h->h_name, sizeof(realhost)); |
c4d8e107 |
523 | } |
c4d8e107 |
524 | } |
32874aea |
525 | } else { |
87ed061f |
526 | /* |
527 | * This must be a numeric IPv4 address because it caused a |
528 | * success return from inet_addr. |
529 | */ |
7555d6a5 |
530 | ret->addresses = snewn(1, unsigned long); |
531 | ret->naddresses = 1; |
7555d6a5 |
532 | ret->addresses[0] = p_ntohl(a); |
facf7568 |
533 | ret->resolved = TRUE; |
6e1ebb76 |
534 | strncpy(realhost, host, sizeof(realhost)); |
2f75bae1 |
535 | } |
6e1ebb76 |
536 | realhost[lenof(realhost)-1] = '\0'; |
3d88e64d |
537 | *canonicalname = snewn(1+strlen(realhost), char); |
6e1ebb76 |
538 | strcpy(*canonicalname, realhost); |
2f75bae1 |
539 | return ret; |
540 | } |
541 | |
e8fa8f62 |
542 | SockAddr sk_nonamelookup(const char *host) |
b7a189f3 |
543 | { |
3d88e64d |
544 | SockAddr ret = snew(struct SockAddr_tag); |
ab0873ab |
545 | ret->error = NULL; |
facf7568 |
546 | ret->resolved = FALSE; |
1822a5e7 |
547 | #ifndef NO_IPV6 |
facf7568 |
548 | ret->ais = NULL; |
1822a5e7 |
549 | #endif |
2cd38976 |
550 | ret->addresses = NULL; |
1822a5e7 |
551 | ret->naddresses = 0; |
5025a993 |
552 | ret->refcount = 1; |
b7a189f3 |
553 | strncpy(ret->hostname, host, lenof(ret->hostname)); |
554 | ret->hostname[lenof(ret->hostname)-1] = '\0'; |
555 | return ret; |
556 | } |
557 | |
facf7568 |
558 | int sk_nextaddr(SockAddr addr, SockAddrStep *step) |
7555d6a5 |
559 | { |
560 | #ifndef NO_IPV6 |
facf7568 |
561 | if (step->ai) { |
562 | if (step->ai->ai_next) { |
563 | step->ai = step->ai->ai_next; |
7555d6a5 |
564 | return TRUE; |
565 | } else |
566 | return FALSE; |
567 | } |
568 | #endif |
facf7568 |
569 | if (step->curraddr+1 < addr->naddresses) { |
570 | step->curraddr++; |
7555d6a5 |
571 | return TRUE; |
572 | } else { |
573 | return FALSE; |
574 | } |
575 | } |
576 | |
3ad9d396 |
577 | void sk_getaddr(SockAddr addr, char *buf, int buflen) |
578 | { |
facf7568 |
579 | SockAddrStep step; |
580 | START_STEP(addr, step); |
581 | |
05581745 |
582 | #ifndef NO_IPV6 |
facf7568 |
583 | if (step.ai) { |
c9ef99df |
584 | if (p_WSAAddressToStringA) { |
facf7568 |
585 | p_WSAAddressToStringA(step.ai->ai_addr, step.ai->ai_addrlen, |
c9ef99df |
586 | NULL, buf, &buflen); |
587 | } else |
588 | strncpy(buf, "IPv6", buflen); |
b7a189f3 |
589 | } else |
3ad9d396 |
590 | #endif |
facf7568 |
591 | if (SOCKADDR_FAMILY(addr, step) == AF_INET) { |
3ad9d396 |
592 | struct in_addr a; |
facf7568 |
593 | assert(addr->addresses && step.curraddr < addr->naddresses); |
594 | a.s_addr = p_htonl(addr->addresses[step.curraddr]); |
7440fd44 |
595 | strncpy(buf, p_inet_ntoa(a), buflen); |
b7a189f3 |
596 | buf[buflen-1] = '\0'; |
3ad9d396 |
597 | } else { |
b7a189f3 |
598 | strncpy(buf, addr->hostname, buflen); |
599 | buf[buflen-1] = '\0'; |
3ad9d396 |
600 | } |
3ad9d396 |
601 | } |
602 | |
b804e1e5 |
603 | int sk_hostname_is_local(char *name) |
604 | { |
db74a69d |
605 | return !strcmp(name, "localhost") || |
606 | !strcmp(name, "::1") || |
607 | !strncmp(name, "127.", 4); |
b804e1e5 |
608 | } |
609 | |
a143ea0a |
610 | static INTERFACE_INFO local_interfaces[16]; |
611 | static int n_local_interfaces; /* 0=not yet, -1=failed, >0=number */ |
612 | |
613 | static int ipv4_is_local_addr(struct in_addr addr) |
614 | { |
615 | if (ipv4_is_loopback(addr)) |
616 | return 1; /* loopback addresses are local */ |
617 | if (!n_local_interfaces) { |
618 | SOCKET s = p_socket(AF_INET, SOCK_DGRAM, 0); |
619 | DWORD retbytes; |
620 | |
621 | if (p_WSAIoctl && |
622 | p_WSAIoctl(s, SIO_GET_INTERFACE_LIST, NULL, 0, |
623 | local_interfaces, sizeof(local_interfaces), |
624 | &retbytes, NULL, NULL) == 0) |
625 | n_local_interfaces = retbytes / sizeof(INTERFACE_INFO); |
626 | else |
627 | logevent(NULL, "Unable to get list of local IP addresses"); |
628 | } |
629 | if (n_local_interfaces > 0) { |
630 | int i; |
631 | for (i = 0; i < n_local_interfaces; i++) { |
632 | SOCKADDR_IN *address = |
633 | (SOCKADDR_IN *)&local_interfaces[i].iiAddress; |
634 | if (address->sin_addr.s_addr == addr.s_addr) |
635 | return 1; /* this address is local */ |
636 | } |
637 | } |
638 | return 0; /* this address is not local */ |
639 | } |
640 | |
b804e1e5 |
641 | int sk_address_is_local(SockAddr addr) |
642 | { |
facf7568 |
643 | SockAddrStep step; |
644 | int family; |
645 | START_STEP(addr, step); |
646 | family = SOCKADDR_FAMILY(addr, step); |
647 | |
05581745 |
648 | #ifndef NO_IPV6 |
facf7568 |
649 | if (family == AF_INET6) { |
650 | return IN6_IS_ADDR_LOOPBACK((const struct in6_addr *)step.ai->ai_addr); |
b7a189f3 |
651 | } else |
b804e1e5 |
652 | #endif |
facf7568 |
653 | if (family == AF_INET) { |
2b4bbb9b |
654 | #ifndef NO_IPV6 |
facf7568 |
655 | if (step.ai) { |
656 | return ipv4_is_local_addr(((struct sockaddr_in *)step.ai->ai_addr) |
2b4bbb9b |
657 | ->sin_addr); |
658 | } else |
659 | #endif |
660 | { |
661 | struct in_addr a; |
facf7568 |
662 | assert(addr->addresses && step.curraddr < addr->naddresses); |
663 | a.s_addr = p_htonl(addr->addresses[step.curraddr]); |
2b4bbb9b |
664 | return ipv4_is_local_addr(a); |
665 | } |
b804e1e5 |
666 | } else { |
facf7568 |
667 | assert(family == AF_UNSPEC); |
b7a189f3 |
668 | return 0; /* we don't know; assume not */ |
b804e1e5 |
669 | } |
b804e1e5 |
670 | } |
671 | |
6971bbe7 |
672 | int sk_addrtype(SockAddr addr) |
673 | { |
facf7568 |
674 | SockAddrStep step; |
675 | int family; |
676 | START_STEP(addr, step); |
677 | family = SOCKADDR_FAMILY(addr, step); |
678 | |
679 | return (family == AF_INET ? ADDRTYPE_IPV4 : |
05581745 |
680 | #ifndef NO_IPV6 |
facf7568 |
681 | family == AF_INET6 ? ADDRTYPE_IPV6 : |
b7a189f3 |
682 | #endif |
683 | ADDRTYPE_NAME); |
6971bbe7 |
684 | } |
685 | |
686 | void sk_addrcopy(SockAddr addr, char *buf) |
687 | { |
facf7568 |
688 | SockAddrStep step; |
689 | int family; |
690 | START_STEP(addr, step); |
691 | family = SOCKADDR_FAMILY(addr, step); |
692 | |
693 | assert(family != AF_UNSPEC); |
05581745 |
694 | #ifndef NO_IPV6 |
facf7568 |
695 | if (step.ai) { |
696 | if (family == AF_INET) |
697 | memcpy(buf, &((struct sockaddr_in *)step.ai->ai_addr)->sin_addr, |
7555d6a5 |
698 | sizeof(struct in_addr)); |
facf7568 |
699 | else if (family == AF_INET6) |
700 | memcpy(buf, &((struct sockaddr_in6 *)step.ai->ai_addr)->sin6_addr, |
7555d6a5 |
701 | sizeof(struct in6_addr)); |
702 | else |
703 | assert(FALSE); |
b7a189f3 |
704 | } else |
6971bbe7 |
705 | #endif |
facf7568 |
706 | if (family == AF_INET) { |
6971bbe7 |
707 | struct in_addr a; |
facf7568 |
708 | assert(addr->addresses && step.curraddr < addr->naddresses); |
709 | a.s_addr = p_htonl(addr->addresses[step.curraddr]); |
96d9eb89 |
710 | memcpy(buf, (char*) &a.s_addr, 4); |
6971bbe7 |
711 | } |
6971bbe7 |
712 | } |
713 | |
32874aea |
714 | void sk_addr_free(SockAddr addr) |
715 | { |
5025a993 |
716 | if (--addr->refcount > 0) |
717 | return; |
7555d6a5 |
718 | #ifndef NO_IPV6 |
719 | if (addr->ais && p_freeaddrinfo) |
720 | p_freeaddrinfo(addr->ais); |
721 | #endif |
722 | if (addr->addresses) |
723 | sfree(addr->addresses); |
2f75bae1 |
724 | sfree(addr); |
725 | } |
726 | |
5025a993 |
727 | SockAddr sk_addr_dup(SockAddr addr) |
728 | { |
729 | addr->refcount++; |
730 | return addr; |
731 | } |
732 | |
32874aea |
733 | static Plug sk_tcp_plug(Socket sock, Plug p) |
734 | { |
7e78000d |
735 | Actual_Socket s = (Actual_Socket) sock; |
736 | Plug ret = s->plug; |
32874aea |
737 | if (p) |
738 | s->plug = p; |
7e78000d |
739 | return ret; |
740 | } |
741 | |
32874aea |
742 | static void sk_tcp_flush(Socket s) |
743 | { |
7e78000d |
744 | /* |
745 | * We send data to the socket as soon as we can anyway, |
746 | * so we don't need to do anything here. :-) |
747 | */ |
748 | } |
749 | |
2d466ffd |
750 | static void sk_tcp_close(Socket s); |
e0e7dff8 |
751 | static int sk_tcp_write(Socket s, const char *data, int len); |
752 | static int sk_tcp_write_oob(Socket s, const char *data, int len); |
8eebd221 |
753 | static void sk_tcp_set_private_ptr(Socket s, void *ptr); |
754 | static void *sk_tcp_get_private_ptr(Socket s); |
755 | static void sk_tcp_set_frozen(Socket s, int is_frozen); |
cbe2d68f |
756 | static const char *sk_tcp_socket_error(Socket s); |
7e78000d |
757 | |
d74d141c |
758 | extern char *do_select(SOCKET skt, int startup); |
759 | |
760 | Socket sk_register(void *sock, Plug plug) |
761 | { |
c85623f9 |
762 | static const struct socket_function_table fn_table = { |
d74d141c |
763 | sk_tcp_plug, |
764 | sk_tcp_close, |
765 | sk_tcp_write, |
766 | sk_tcp_write_oob, |
767 | sk_tcp_flush, |
8eebd221 |
768 | sk_tcp_set_private_ptr, |
769 | sk_tcp_get_private_ptr, |
770 | sk_tcp_set_frozen, |
d74d141c |
771 | sk_tcp_socket_error |
772 | }; |
773 | |
774 | DWORD err; |
775 | char *errstr; |
776 | Actual_Socket ret; |
777 | |
778 | /* |
779 | * Create Socket structure. |
780 | */ |
3d88e64d |
781 | ret = snew(struct Socket_tag); |
d74d141c |
782 | ret->fn = &fn_table; |
783 | ret->error = NULL; |
784 | ret->plug = plug; |
5471d09a |
785 | bufchain_init(&ret->output_data); |
d74d141c |
786 | ret->writable = 1; /* to start with */ |
787 | ret->sending_oob = 0; |
788 | ret->frozen = 1; |
5471d09a |
789 | ret->frozen_readable = 0; |
bc4802a1 |
790 | ret->localhost_only = 0; /* unused, but best init anyway */ |
7732d38a |
791 | ret->pending_error = 0; |
ae400b95 |
792 | ret->parent = ret->child = NULL; |
7555d6a5 |
793 | ret->addr = NULL; |
d74d141c |
794 | |
795 | ret->s = (SOCKET)sock; |
796 | |
797 | if (ret->s == INVALID_SOCKET) { |
7440fd44 |
798 | err = p_WSAGetLastError(); |
d74d141c |
799 | ret->error = winsock_error_string(err); |
800 | return (Socket) ret; |
801 | } |
802 | |
803 | ret->oobinline = 0; |
804 | |
805 | /* Set up a select mechanism. This could be an AsyncSelect on a |
806 | * window, or an EventSelect on an event object. */ |
807 | errstr = do_select(ret->s, 1); |
808 | if (errstr) { |
809 | ret->error = errstr; |
810 | return (Socket) ret; |
811 | } |
812 | |
813 | add234(sktree, ret); |
814 | |
815 | return (Socket) ret; |
816 | } |
817 | |
7555d6a5 |
818 | static DWORD try_connect(Actual_Socket sock) |
7e78000d |
819 | { |
2f75bae1 |
820 | SOCKET s; |
05581745 |
821 | #ifndef NO_IPV6 |
c4d8e107 |
822 | SOCKADDR_IN6 a6; |
823 | #endif |
2f75bae1 |
824 | SOCKADDR_IN a; |
825 | DWORD err; |
826 | char *errstr; |
c91409da |
827 | short localport; |
7555d6a5 |
828 | int family; |
2f75bae1 |
829 | |
7555d6a5 |
830 | if (sock->s != INVALID_SOCKET) { |
831 | do_select(sock->s, 0); |
832 | p_closesocket(sock->s); |
833 | } |
834 | |
835 | plug_log(sock->plug, 0, sock->addr, sock->port, NULL, 0); |
2f75bae1 |
836 | |
837 | /* |
838 | * Open socket. |
839 | */ |
facf7568 |
840 | family = SOCKADDR_FAMILY(sock->addr, sock->step); |
7555d6a5 |
841 | |
b34544ba |
842 | /* |
843 | * Remove the socket from the tree before we overwrite its |
844 | * internal socket id, because that forms part of the tree's |
845 | * sorting criterion. We'll add it back before exiting this |
846 | * function, whether we changed anything or not. |
847 | */ |
848 | del234(sktree, sock); |
849 | |
7555d6a5 |
850 | s = p_socket(family, SOCK_STREAM, 0); |
851 | sock->s = s; |
2f75bae1 |
852 | |
853 | if (s == INVALID_SOCKET) { |
7440fd44 |
854 | err = p_WSAGetLastError(); |
7555d6a5 |
855 | sock->error = winsock_error_string(err); |
856 | goto ret; |
2f75bae1 |
857 | } |
4b1e8acc |
858 | |
7555d6a5 |
859 | if (sock->oobinline) { |
1ad4eb6f |
860 | BOOL b = TRUE; |
7440fd44 |
861 | p_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (void *) &b, sizeof(b)); |
1ad4eb6f |
862 | } |
2f75bae1 |
863 | |
7555d6a5 |
864 | if (sock->nodelay) { |
2184a5d9 |
865 | BOOL b = TRUE; |
7440fd44 |
866 | p_setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (void *) &b, sizeof(b)); |
2184a5d9 |
867 | } |
868 | |
7555d6a5 |
869 | if (sock->keepalive) { |
79bf227b |
870 | BOOL b = TRUE; |
871 | p_setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *) &b, sizeof(b)); |
872 | } |
873 | |
2f75bae1 |
874 | /* |
875 | * Bind to local address. |
876 | */ |
7555d6a5 |
877 | if (sock->privport) |
32874aea |
878 | localport = 1023; /* count from 1023 downwards */ |
c4d8e107 |
879 | else |
32874aea |
880 | localport = 0; /* just use port 0 (ie winsock picks) */ |
c91409da |
881 | |
882 | /* Loop round trying to bind */ |
883 | while (1) { |
7555d6a5 |
884 | int sockcode; |
c91409da |
885 | |
05581745 |
886 | #ifndef NO_IPV6 |
7555d6a5 |
887 | if (family == AF_INET6) { |
32874aea |
888 | memset(&a6, 0, sizeof(a6)); |
889 | a6.sin6_family = AF_INET6; |
05581745 |
890 | /*a6.sin6_addr = in6addr_any; */ /* == 0 done by memset() */ |
7440fd44 |
891 | a6.sin6_port = p_htons(localport); |
32874aea |
892 | } else |
c4d8e107 |
893 | #endif |
32874aea |
894 | { |
895 | a.sin_family = AF_INET; |
7440fd44 |
896 | a.sin_addr.s_addr = p_htonl(INADDR_ANY); |
897 | a.sin_port = p_htons(localport); |
32874aea |
898 | } |
05581745 |
899 | #ifndef NO_IPV6 |
facf7568 |
900 | sockcode = p_bind(s, (family == AF_INET6 ? |
901 | (struct sockaddr *) &a6 : |
902 | (struct sockaddr *) &a), |
903 | (family == AF_INET6 ? sizeof(a6) : sizeof(a))); |
c4d8e107 |
904 | #else |
7555d6a5 |
905 | sockcode = p_bind(s, (struct sockaddr *) &a, sizeof(a)); |
c4d8e107 |
906 | #endif |
7555d6a5 |
907 | if (sockcode != SOCKET_ERROR) { |
32874aea |
908 | err = 0; |
909 | break; /* done */ |
910 | } else { |
7440fd44 |
911 | err = p_WSAGetLastError(); |
32874aea |
912 | if (err != WSAEADDRINUSE) /* failed, for a bad reason */ |
913 | break; |
914 | } |
915 | |
916 | if (localport == 0) |
917 | break; /* we're only looping once */ |
918 | localport--; |
919 | if (localport == 0) |
920 | break; /* we might have got to the end */ |
c91409da |
921 | } |
922 | |
32874aea |
923 | if (err) { |
7555d6a5 |
924 | sock->error = winsock_error_string(err); |
925 | goto ret; |
2f75bae1 |
926 | } |
927 | |
928 | /* |
929 | * Connect to remote address. |
930 | */ |
05581745 |
931 | #ifndef NO_IPV6 |
facf7568 |
932 | if (sock->step.ai) { |
7555d6a5 |
933 | if (family == AF_INET6) { |
934 | a6.sin6_family = AF_INET6; |
935 | a6.sin6_port = p_htons((short) sock->port); |
936 | a6.sin6_addr = |
facf7568 |
937 | ((struct sockaddr_in6 *) sock->step.ai->ai_addr)->sin6_addr; |
938 | a6.sin6_flowinfo = ((struct sockaddr_in6 *) sock->step.ai->ai_addr)->sin6_flowinfo; |
939 | a6.sin6_scope_id = ((struct sockaddr_in6 *) sock->step.ai->ai_addr)->sin6_scope_id; |
7555d6a5 |
940 | } else { |
941 | a.sin_family = AF_INET; |
942 | a.sin_addr = |
facf7568 |
943 | ((struct sockaddr_in *) sock->step.ai->ai_addr)->sin_addr; |
7555d6a5 |
944 | a.sin_port = p_htons((short) sock->port); |
945 | } |
32874aea |
946 | } else |
c4d8e107 |
947 | #endif |
32874aea |
948 | { |
facf7568 |
949 | assert(sock->addr->addresses && sock->step.curraddr < sock->addr->naddresses); |
c4d8e107 |
950 | a.sin_family = AF_INET; |
facf7568 |
951 | a.sin_addr.s_addr = p_htonl(sock->addr->addresses[sock->step.curraddr]); |
7555d6a5 |
952 | a.sin_port = p_htons((short) sock->port); |
c4d8e107 |
953 | } |
3ad9d396 |
954 | |
955 | /* Set up a select mechanism. This could be an AsyncSelect on a |
956 | * window, or an EventSelect on an event object. */ |
957 | errstr = do_select(s, 1); |
958 | if (errstr) { |
7555d6a5 |
959 | sock->error = errstr; |
960 | err = 1; |
961 | goto ret; |
3ad9d396 |
962 | } |
963 | |
32874aea |
964 | if (( |
05581745 |
965 | #ifndef NO_IPV6 |
7555d6a5 |
966 | p_connect(s, |
967 | ((family == AF_INET6) ? (struct sockaddr *) &a6 : |
968 | (struct sockaddr *) &a), |
969 | (family == AF_INET6) ? sizeof(a6) : sizeof(a)) |
c4d8e107 |
970 | #else |
7440fd44 |
971 | p_connect(s, (struct sockaddr *) &a, sizeof(a)) |
c4d8e107 |
972 | #endif |
32874aea |
973 | ) == SOCKET_ERROR) { |
7440fd44 |
974 | err = p_WSAGetLastError(); |
3ad9d396 |
975 | /* |
976 | * We expect a potential EWOULDBLOCK here, because the |
977 | * chances are the front end has done a select for |
978 | * FD_CONNECT, so that connect() will complete |
979 | * asynchronously. |
980 | */ |
981 | if ( err != WSAEWOULDBLOCK ) { |
7555d6a5 |
982 | sock->error = winsock_error_string(err); |
983 | goto ret; |
3ad9d396 |
984 | } |
985 | } else { |
986 | /* |
987 | * If we _don't_ get EWOULDBLOCK, the connect has completed |
988 | * and we should set the socket as writable. |
989 | */ |
7555d6a5 |
990 | sock->writable = 1; |
2f75bae1 |
991 | } |
992 | |
7555d6a5 |
993 | err = 0; |
994 | |
995 | ret: |
b34544ba |
996 | |
997 | /* |
998 | * No matter what happened, put the socket back in the tree. |
999 | */ |
1000 | add234(sktree, sock); |
1001 | |
7555d6a5 |
1002 | if (err) |
1003 | plug_log(sock->plug, 1, sock->addr, sock->port, sock->error, err); |
1004 | return err; |
1005 | } |
1006 | |
1007 | Socket sk_new(SockAddr addr, int port, int privport, int oobinline, |
1008 | int nodelay, int keepalive, Plug plug) |
1009 | { |
1010 | static const struct socket_function_table fn_table = { |
1011 | sk_tcp_plug, |
1012 | sk_tcp_close, |
1013 | sk_tcp_write, |
1014 | sk_tcp_write_oob, |
1015 | sk_tcp_flush, |
1016 | sk_tcp_set_private_ptr, |
1017 | sk_tcp_get_private_ptr, |
1018 | sk_tcp_set_frozen, |
1019 | sk_tcp_socket_error |
1020 | }; |
1021 | |
1022 | Actual_Socket ret; |
1023 | DWORD err; |
1024 | |
1025 | /* |
1026 | * Create Socket structure. |
1027 | */ |
1028 | ret = snew(struct Socket_tag); |
1029 | ret->fn = &fn_table; |
1030 | ret->error = NULL; |
1031 | ret->plug = plug; |
1032 | bufchain_init(&ret->output_data); |
1033 | ret->connected = 0; /* to start with */ |
1034 | ret->writable = 0; /* to start with */ |
1035 | ret->sending_oob = 0; |
1036 | ret->frozen = 0; |
1037 | ret->frozen_readable = 0; |
1038 | ret->localhost_only = 0; /* unused, but best init anyway */ |
1039 | ret->pending_error = 0; |
1040 | ret->parent = ret->child = NULL; |
1041 | ret->oobinline = oobinline; |
1042 | ret->nodelay = nodelay; |
1043 | ret->keepalive = keepalive; |
1044 | ret->privport = privport; |
1045 | ret->port = port; |
1046 | ret->addr = addr; |
facf7568 |
1047 | START_STEP(ret->addr, ret->step); |
7555d6a5 |
1048 | ret->s = INVALID_SOCKET; |
1049 | |
1050 | err = 0; |
1051 | do { |
1052 | err = try_connect(ret); |
facf7568 |
1053 | } while (err && sk_nextaddr(ret->addr, &ret->step)); |
f85e6f6e |
1054 | |
7e78000d |
1055 | return (Socket) ret; |
2f75bae1 |
1056 | } |
1057 | |
05581745 |
1058 | Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only, |
ae400b95 |
1059 | int orig_address_family) |
d74d141c |
1060 | { |
c85623f9 |
1061 | static const struct socket_function_table fn_table = { |
d74d141c |
1062 | sk_tcp_plug, |
1063 | sk_tcp_close, |
1064 | sk_tcp_write, |
1065 | sk_tcp_write_oob, |
1066 | sk_tcp_flush, |
8eebd221 |
1067 | sk_tcp_set_private_ptr, |
1068 | sk_tcp_get_private_ptr, |
1069 | sk_tcp_set_frozen, |
d74d141c |
1070 | sk_tcp_socket_error |
1071 | }; |
1072 | |
1073 | SOCKET s; |
05581745 |
1074 | #ifndef NO_IPV6 |
d74d141c |
1075 | SOCKADDR_IN6 a6; |
1076 | #endif |
1077 | SOCKADDR_IN a; |
05581745 |
1078 | |
d74d141c |
1079 | DWORD err; |
1080 | char *errstr; |
1081 | Actual_Socket ret; |
1082 | int retcode; |
1083 | int on = 1; |
1084 | |
ae400b95 |
1085 | int address_family; |
1086 | |
d74d141c |
1087 | /* |
1088 | * Create Socket structure. |
1089 | */ |
3d88e64d |
1090 | ret = snew(struct Socket_tag); |
d74d141c |
1091 | ret->fn = &fn_table; |
1092 | ret->error = NULL; |
1093 | ret->plug = plug; |
5471d09a |
1094 | bufchain_init(&ret->output_data); |
d74d141c |
1095 | ret->writable = 0; /* to start with */ |
1096 | ret->sending_oob = 0; |
1097 | ret->frozen = 0; |
5471d09a |
1098 | ret->frozen_readable = 0; |
bc4802a1 |
1099 | ret->localhost_only = local_host_only; |
7732d38a |
1100 | ret->pending_error = 0; |
ae400b95 |
1101 | ret->parent = ret->child = NULL; |
7555d6a5 |
1102 | ret->addr = NULL; |
d74d141c |
1103 | |
1104 | /* |
05581745 |
1105 | * Translate address_family from platform-independent constants |
1106 | * into local reality. |
1107 | */ |
ae400b95 |
1108 | address_family = (orig_address_family == ADDRTYPE_IPV4 ? AF_INET : |
05581745 |
1109 | #ifndef NO_IPV6 |
ae400b95 |
1110 | orig_address_family == ADDRTYPE_IPV6 ? AF_INET6 : |
05581745 |
1111 | #endif |
1112 | AF_UNSPEC); |
ae400b95 |
1113 | |
1114 | /* |
1115 | * Our default, if passed the `don't care' value |
1116 | * ADDRTYPE_UNSPEC, is to listen on IPv4. If IPv6 is supported, |
1117 | * we will also set up a second socket listening on IPv6, but |
1118 | * the v4 one is primary since that ought to work even on |
1119 | * non-v6-supporting systems. |
1120 | */ |
1121 | if (address_family == AF_UNSPEC) address_family = AF_INET; |
05581745 |
1122 | |
1123 | /* |
d74d141c |
1124 | * Open socket. |
1125 | */ |
05581745 |
1126 | s = p_socket(address_family, SOCK_STREAM, 0); |
d74d141c |
1127 | ret->s = s; |
1128 | |
1129 | if (s == INVALID_SOCKET) { |
7440fd44 |
1130 | err = p_WSAGetLastError(); |
d74d141c |
1131 | ret->error = winsock_error_string(err); |
1132 | return (Socket) ret; |
1133 | } |
1134 | |
1135 | ret->oobinline = 0; |
1136 | |
7440fd44 |
1137 | p_setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *)&on, sizeof(on)); |
d74d141c |
1138 | |
05581745 |
1139 | #ifndef NO_IPV6 |
1140 | if (address_family == AF_INET6) { |
d74d141c |
1141 | memset(&a6, 0, sizeof(a6)); |
1142 | a6.sin6_family = AF_INET6; |
6ee9b735 |
1143 | /* FIXME: srcaddr is ignored for IPv6, because I (SGT) don't |
05581745 |
1144 | * know how to do it. :-) |
1145 | * (jeroen:) saddr is specified as an address.. eg 2001:db8::1 |
1146 | * Thus we need either a parser that understands [2001:db8::1]:80 |
1147 | * style addresses and/or enhance this to understand hostnames too. */ |
bcce45ed |
1148 | if (local_host_only) |
1149 | a6.sin6_addr = in6addr_loopback; |
1150 | else |
1151 | a6.sin6_addr = in6addr_any; |
7440fd44 |
1152 | a6.sin6_port = p_htons(port); |
d74d141c |
1153 | } else |
1154 | #endif |
1155 | { |
6ee9b735 |
1156 | int got_addr = 0; |
d74d141c |
1157 | a.sin_family = AF_INET; |
6ee9b735 |
1158 | |
1159 | /* |
1160 | * Bind to source address. First try an explicitly |
1161 | * specified one... |
1162 | */ |
1163 | if (srcaddr) { |
7440fd44 |
1164 | a.sin_addr.s_addr = p_inet_addr(srcaddr); |
6ee9b735 |
1165 | if (a.sin_addr.s_addr != INADDR_NONE) { |
1166 | /* Override localhost_only with specified listen addr. */ |
1167 | ret->localhost_only = ipv4_is_loopback(a.sin_addr); |
1168 | got_addr = 1; |
1169 | } |
1170 | } |
1171 | |
1172 | /* |
1173 | * ... and failing that, go with one of the standard ones. |
1174 | */ |
1175 | if (!got_addr) { |
1176 | if (local_host_only) |
7440fd44 |
1177 | a.sin_addr.s_addr = p_htonl(INADDR_LOOPBACK); |
6ee9b735 |
1178 | else |
7440fd44 |
1179 | a.sin_addr.s_addr = p_htonl(INADDR_ANY); |
6ee9b735 |
1180 | } |
1181 | |
7440fd44 |
1182 | a.sin_port = p_htons((short)port); |
d74d141c |
1183 | } |
05581745 |
1184 | #ifndef NO_IPV6 |
1185 | retcode = p_bind(s, (address_family == AF_INET6 ? |
d74d141c |
1186 | (struct sockaddr *) &a6 : |
1187 | (struct sockaddr *) &a), |
05581745 |
1188 | (address_family == |
d74d141c |
1189 | AF_INET6 ? sizeof(a6) : sizeof(a))); |
1190 | #else |
7440fd44 |
1191 | retcode = p_bind(s, (struct sockaddr *) &a, sizeof(a)); |
d74d141c |
1192 | #endif |
1193 | if (retcode != SOCKET_ERROR) { |
1194 | err = 0; |
1195 | } else { |
7440fd44 |
1196 | err = p_WSAGetLastError(); |
d74d141c |
1197 | } |
1198 | |
1199 | if (err) { |
ae400b95 |
1200 | p_closesocket(s); |
d74d141c |
1201 | ret->error = winsock_error_string(err); |
1202 | return (Socket) ret; |
1203 | } |
1204 | |
1205 | |
7440fd44 |
1206 | if (p_listen(s, SOMAXCONN) == SOCKET_ERROR) { |
1207 | p_closesocket(s); |
d74d141c |
1208 | ret->error = winsock_error_string(err); |
1209 | return (Socket) ret; |
1210 | } |
1211 | |
1212 | /* Set up a select mechanism. This could be an AsyncSelect on a |
1213 | * window, or an EventSelect on an event object. */ |
1214 | errstr = do_select(s, 1); |
1215 | if (errstr) { |
ae400b95 |
1216 | p_closesocket(s); |
d74d141c |
1217 | ret->error = errstr; |
1218 | return (Socket) ret; |
1219 | } |
1220 | |
1221 | add234(sktree, ret); |
1222 | |
ae400b95 |
1223 | #ifndef NO_IPV6 |
1224 | /* |
1225 | * If we were given ADDRTYPE_UNSPEC, we must also create an |
1226 | * IPv6 listening socket and link it to this one. |
1227 | */ |
1228 | if (address_family == AF_INET && orig_address_family == ADDRTYPE_UNSPEC) { |
1229 | Actual_Socket other; |
1230 | |
1231 | other = (Actual_Socket) sk_newlistener(srcaddr, port, plug, |
1232 | local_host_only, ADDRTYPE_IPV6); |
1233 | |
1234 | if (other) { |
1235 | if (!other->error) { |
1236 | other->parent = ret; |
1237 | ret->child = other; |
1238 | } else { |
1239 | sfree(other); |
1240 | } |
1241 | } |
1242 | } |
1243 | #endif |
1244 | |
d74d141c |
1245 | return (Socket) ret; |
1246 | } |
1247 | |
32874aea |
1248 | static void sk_tcp_close(Socket sock) |
1249 | { |
9c964e85 |
1250 | extern char *do_select(SOCKET skt, int startup); |
7e78000d |
1251 | Actual_Socket s = (Actual_Socket) sock; |
9c964e85 |
1252 | |
ae400b95 |
1253 | if (s->child) |
1254 | sk_tcp_close((Socket)s->child); |
1255 | |
2f75bae1 |
1256 | del234(sktree, s); |
1257 | do_select(s->s, 0); |
7440fd44 |
1258 | p_closesocket(s->s); |
7555d6a5 |
1259 | if (s->addr) |
1260 | sk_addr_free(s->addr); |
dcbde236 |
1261 | sfree(s); |
2f75bae1 |
1262 | } |
1263 | |
2f75bae1 |
1264 | /* |
1265 | * The function which tries to send on a socket once it's deemed |
1266 | * writable. |
1267 | */ |
32874aea |
1268 | void try_send(Actual_Socket s) |
1269 | { |
5471d09a |
1270 | while (s->sending_oob || bufchain_size(&s->output_data) > 0) { |
2f75bae1 |
1271 | int nsent; |
1272 | DWORD err; |
5471d09a |
1273 | void *data; |
32874aea |
1274 | int len, urgentflag; |
1275 | |
1276 | if (s->sending_oob) { |
1277 | urgentflag = MSG_OOB; |
1278 | len = s->sending_oob; |
5471d09a |
1279 | data = &s->oobdata; |
32874aea |
1280 | } else { |
1281 | urgentflag = 0; |
5471d09a |
1282 | bufchain_prefix(&s->output_data, &data, &len); |
32874aea |
1283 | } |
7440fd44 |
1284 | nsent = p_send(s->s, data, len, urgentflag); |
32874aea |
1285 | noise_ultralight(nsent); |
2f75bae1 |
1286 | if (nsent <= 0) { |
7440fd44 |
1287 | err = (nsent < 0 ? p_WSAGetLastError() : 0); |
e5eb3a1c |
1288 | if ((err < WSABASEERR && nsent < 0) || err == WSAEWOULDBLOCK) { |
d40a94b9 |
1289 | /* |
1290 | * Perfectly normal: we've sent all we can for the moment. |
1291 | * |
e5eb3a1c |
1292 | * (Some WinSock send() implementations can return |
1293 | * <0 but leave no sensible error indication - |
1294 | * WSAGetLastError() is called but returns zero or |
1295 | * a small number - so we check that case and treat |
1296 | * it just like WSAEWOULDBLOCK.) |
d40a94b9 |
1297 | */ |
2f75bae1 |
1298 | s->writable = FALSE; |
32874aea |
1299 | return; |
2f75bae1 |
1300 | } else if (nsent == 0 || |
32874aea |
1301 | err == WSAECONNABORTED || err == WSAECONNRESET) { |
1302 | /* |
7732d38a |
1303 | * If send() returns CONNABORTED or CONNRESET, we |
1304 | * unfortunately can't just call plug_closing(), |
1305 | * because it's quite likely that we're currently |
1306 | * _in_ a call from the code we'd be calling back |
1307 | * to, so we'd have to make half the SSH code |
1308 | * reentrant. Instead we flag a pending error on |
1309 | * the socket, to be dealt with (by calling |
1310 | * plug_closing()) at some suitable future moment. |
32874aea |
1311 | */ |
7732d38a |
1312 | s->pending_error = err; |
1313 | return; |
2f75bae1 |
1314 | } else { |
a8327734 |
1315 | /* We're inside the Windows frontend here, so we know |
1316 | * that the frontend handle is unnecessary. */ |
1317 | logevent(NULL, winsock_error_string(err)); |
247308b5 |
1318 | fatalbox("%s", winsock_error_string(err)); |
2f75bae1 |
1319 | } |
1320 | } else { |
5471d09a |
1321 | if (s->sending_oob) { |
1322 | if (nsent < len) { |
1323 | memmove(s->oobdata, s->oobdata+nsent, len-nsent); |
1324 | s->sending_oob = len - nsent; |
1325 | } else { |
1326 | s->sending_oob = 0; |
1327 | } |
1328 | } else { |
1329 | bufchain_consume(&s->output_data, nsent); |
2f75bae1 |
1330 | } |
1331 | } |
1332 | } |
1333 | } |
1334 | |
e0e7dff8 |
1335 | static int sk_tcp_write(Socket sock, const char *buf, int len) |
32874aea |
1336 | { |
7e78000d |
1337 | Actual_Socket s = (Actual_Socket) sock; |
1338 | |
2f75bae1 |
1339 | /* |
1340 | * Add the data to the buffer list on the socket. |
1341 | */ |
5471d09a |
1342 | bufchain_add(&s->output_data, buf, len); |
2f75bae1 |
1343 | |
1344 | /* |
1345 | * Now try sending from the start of the buffer list. |
1346 | */ |
1347 | if (s->writable) |
1348 | try_send(s); |
5471d09a |
1349 | |
1350 | return bufchain_size(&s->output_data); |
2f75bae1 |
1351 | } |
1352 | |
e0e7dff8 |
1353 | static int sk_tcp_write_oob(Socket sock, const char *buf, int len) |
32874aea |
1354 | { |
7e78000d |
1355 | Actual_Socket s = (Actual_Socket) sock; |
1356 | |
2f75bae1 |
1357 | /* |
1358 | * Replace the buffer list on the socket with the data. |
1359 | */ |
5471d09a |
1360 | bufchain_clear(&s->output_data); |
1361 | assert(len <= sizeof(s->oobdata)); |
1362 | memcpy(s->oobdata, buf, len); |
2f75bae1 |
1363 | s->sending_oob = len; |
1364 | |
1365 | /* |
1366 | * Now try sending from the start of the buffer list. |
1367 | */ |
1368 | if (s->writable) |
1369 | try_send(s); |
5471d09a |
1370 | |
1371 | return s->sending_oob; |
2f75bae1 |
1372 | } |
1373 | |
32874aea |
1374 | int select_result(WPARAM wParam, LPARAM lParam) |
1375 | { |
f9d3f227 |
1376 | int ret, open; |
2f75bae1 |
1377 | DWORD err; |
b675c612 |
1378 | char buf[20480]; /* nice big buffer for plenty of speed */ |
7e78000d |
1379 | Actual_Socket s; |
49bad831 |
1380 | u_long atmark; |
2f75bae1 |
1381 | |
1382 | /* wParam is the socket itself */ |
cc8b0ee9 |
1383 | |
ce6fcfa5 |
1384 | if (wParam == 0) |
1385 | return 1; /* boggle */ |
cc8b0ee9 |
1386 | |
32874aea |
1387 | s = find234(sktree, (void *) wParam, cmpforsearch); |
2f75bae1 |
1388 | if (!s) |
1389 | return 1; /* boggle */ |
1390 | |
1391 | if ((err = WSAGETSELECTERROR(lParam)) != 0) { |
32874aea |
1392 | /* |
1393 | * An error has occurred on this socket. Pass it to the |
1394 | * plug. |
1395 | */ |
7555d6a5 |
1396 | if (s->addr) { |
1397 | plug_log(s->plug, 1, s->addr, s->port, |
1398 | winsock_error_string(err), err); |
facf7568 |
1399 | while (s->addr && sk_nextaddr(s->addr, &s->step)) { |
7555d6a5 |
1400 | err = try_connect(s); |
1401 | } |
1402 | } |
1403 | if (err != 0) |
1404 | return plug_closing(s->plug, winsock_error_string(err), err, 0); |
1405 | else |
1406 | return 1; |
2f75bae1 |
1407 | } |
1408 | |
7d6ee6ff |
1409 | noise_ultralight(lParam); |
1410 | |
2f75bae1 |
1411 | switch (WSAGETSELECTEVENT(lParam)) { |
3ad9d396 |
1412 | case FD_CONNECT: |
1413 | s->connected = s->writable = 1; |
7555d6a5 |
1414 | /* |
1415 | * Once a socket is connected, we can stop falling |
1416 | * back through the candidate addresses to connect |
1417 | * to. |
1418 | */ |
1419 | if (s->addr) { |
1420 | sk_addr_free(s->addr); |
1421 | s->addr = NULL; |
1422 | } |
3ad9d396 |
1423 | break; |
2f75bae1 |
1424 | case FD_READ: |
d74d141c |
1425 | /* In the case the socket is still frozen, we don't even bother */ |
5471d09a |
1426 | if (s->frozen) { |
1427 | s->frozen_readable = 1; |
d74d141c |
1428 | break; |
5471d09a |
1429 | } |
d74d141c |
1430 | |
32874aea |
1431 | /* |
1432 | * We have received data on the socket. For an oobinline |
1433 | * socket, this might be data _before_ an urgent pointer, |
1434 | * in which case we send it to the back end with type==1 |
1435 | * (data prior to urgent). |
1436 | */ |
1437 | if (s->oobinline) { |
1438 | atmark = 1; |
7440fd44 |
1439 | p_ioctlsocket(s->s, SIOCATMARK, &atmark); |
32874aea |
1440 | /* |
1441 | * Avoid checking the return value from ioctlsocket(), |
1442 | * on the grounds that some WinSock wrappers don't |
1443 | * support it. If it does nothing, we get atmark==1, |
1444 | * which is equivalent to `no OOB pending', so the |
1445 | * effect will be to non-OOB-ify any OOB data. |
1446 | */ |
1447 | } else |
1448 | atmark = 1; |
4b1e8acc |
1449 | |
7440fd44 |
1450 | ret = p_recv(s->s, buf, sizeof(buf), 0); |
32874aea |
1451 | noise_ultralight(ret); |
2f75bae1 |
1452 | if (ret < 0) { |
7440fd44 |
1453 | err = p_WSAGetLastError(); |
2f75bae1 |
1454 | if (err == WSAEWOULDBLOCK) { |
1455 | break; |
1456 | } |
1457 | } |
1458 | if (ret < 0) { |
32874aea |
1459 | return plug_closing(s->plug, winsock_error_string(err), err, |
1460 | 0); |
7e78000d |
1461 | } else if (0 == ret) { |
32874aea |
1462 | return plug_closing(s->plug, NULL, 0, 0); |
2f75bae1 |
1463 | } else { |
32874aea |
1464 | return plug_receive(s->plug, atmark ? 0 : 1, buf, ret); |
2f75bae1 |
1465 | } |
1466 | break; |
1467 | case FD_OOB: |
32874aea |
1468 | /* |
1469 | * This will only happen on a non-oobinline socket. It |
1470 | * indicates that we can immediately perform an OOB read |
1471 | * and get back OOB data, which we will send to the back |
1472 | * end with type==2 (urgent data). |
1473 | */ |
7440fd44 |
1474 | ret = p_recv(s->s, buf, sizeof(buf), MSG_OOB); |
32874aea |
1475 | noise_ultralight(ret); |
1476 | if (ret <= 0) { |
247308b5 |
1477 | char *str = (ret == 0 ? "Internal networking trouble" : |
7440fd44 |
1478 | winsock_error_string(p_WSAGetLastError())); |
a8327734 |
1479 | /* We're inside the Windows frontend here, so we know |
1480 | * that the frontend handle is unnecessary. */ |
1481 | logevent(NULL, str); |
247308b5 |
1482 | fatalbox("%s", str); |
32874aea |
1483 | } else { |
1484 | return plug_receive(s->plug, 2, buf, ret); |
1485 | } |
1486 | break; |
2f75bae1 |
1487 | case FD_WRITE: |
5471d09a |
1488 | { |
1489 | int bufsize_before, bufsize_after; |
1490 | s->writable = 1; |
1491 | bufsize_before = s->sending_oob + bufchain_size(&s->output_data); |
1492 | try_send(s); |
1493 | bufsize_after = s->sending_oob + bufchain_size(&s->output_data); |
1494 | if (bufsize_after < bufsize_before) |
1495 | plug_sent(s->plug, bufsize_after); |
1496 | } |
2f75bae1 |
1497 | break; |
1498 | case FD_CLOSE: |
f9d3f227 |
1499 | /* Signal a close on the socket. First read any outstanding data. */ |
32874aea |
1500 | open = 1; |
1501 | do { |
7440fd44 |
1502 | ret = p_recv(s->s, buf, sizeof(buf), 0); |
32874aea |
1503 | if (ret < 0) { |
7440fd44 |
1504 | err = p_WSAGetLastError(); |
32874aea |
1505 | if (err == WSAEWOULDBLOCK) |
1506 | break; |
1507 | return plug_closing(s->plug, winsock_error_string(err), |
1508 | err, 0); |
1509 | } else { |
1510 | if (ret) |
1511 | open &= plug_receive(s->plug, 0, buf, ret); |
1512 | else |
1513 | open &= plug_closing(s->plug, NULL, 0, 0); |
7e78000d |
1514 | } |
f9d3f227 |
1515 | } while (ret > 0); |
32874aea |
1516 | return open; |
d74d141c |
1517 | case FD_ACCEPT: |
1518 | { |
05581745 |
1519 | #ifdef NO_IPV6 |
bc4802a1 |
1520 | struct sockaddr_in isa; |
05581745 |
1521 | #else |
1522 | struct sockaddr_storage isa; |
1523 | #endif |
1524 | int addrlen = sizeof(isa); |
bcce45ed |
1525 | SOCKET t; /* socket of connection */ |
1526 | |
05581745 |
1527 | memset(&isa, 0, sizeof(isa)); |
bcce45ed |
1528 | err = 0; |
7440fd44 |
1529 | t = p_accept(s->s,(struct sockaddr *)&isa,&addrlen); |
bcce45ed |
1530 | if (t == INVALID_SOCKET) |
1531 | { |
7440fd44 |
1532 | err = p_WSAGetLastError(); |
bcce45ed |
1533 | if (err == WSATRY_AGAIN) |
1534 | break; |
1535 | } |
05581745 |
1536 | #ifndef NO_IPV6 |
1537 | if (isa.ss_family == AF_INET && |
1538 | s->localhost_only && |
9f7ebadc |
1539 | !ipv4_is_local_addr(((struct sockaddr_in *)&isa)->sin_addr)) |
05581745 |
1540 | #else |
9f7ebadc |
1541 | if (s->localhost_only && !ipv4_is_local_addr(isa.sin_addr)) |
05581745 |
1542 | #endif |
9f7ebadc |
1543 | { |
7440fd44 |
1544 | p_closesocket(t); /* dodgy WinSock let nonlocal through */ |
bc4802a1 |
1545 | } else if (plug_accepting(s->plug, (void*)t)) { |
7440fd44 |
1546 | p_closesocket(t); /* denied or error */ |
bcce45ed |
1547 | } |
d74d141c |
1548 | } |
2f75bae1 |
1549 | } |
1550 | |
1551 | return 1; |
1552 | } |
1553 | |
1554 | /* |
7732d38a |
1555 | * Deal with socket errors detected in try_send(). |
1556 | */ |
1557 | void net_pending_errors(void) |
1558 | { |
1559 | int i; |
1560 | Actual_Socket s; |
1561 | |
1562 | /* |
1563 | * This might be a fiddly business, because it's just possible |
1564 | * that handling a pending error on one socket might cause |
1565 | * others to be closed. (I can't think of any reason this might |
1566 | * happen in current SSH implementation, but to maintain |
1567 | * generality of this network layer I'll assume the worst.) |
1568 | * |
1569 | * So what we'll do is search the socket list for _one_ socket |
1570 | * with a pending error, and then handle it, and then search |
1571 | * the list again _from the beginning_. Repeat until we make a |
1572 | * pass with no socket errors present. That way we are |
1573 | * protected against the socket list changing under our feet. |
1574 | */ |
1575 | |
1576 | do { |
1577 | for (i = 0; (s = index234(sktree, i)) != NULL; i++) { |
1578 | if (s->pending_error) { |
1579 | /* |
1580 | * An error has occurred on this socket. Pass it to the |
1581 | * plug. |
1582 | */ |
1583 | plug_closing(s->plug, |
1584 | winsock_error_string(s->pending_error), |
1585 | s->pending_error, 0); |
1586 | break; |
1587 | } |
1588 | } |
1589 | } while (s); |
1590 | } |
1591 | |
1592 | /* |
2f75bae1 |
1593 | * Each socket abstraction contains a `void *' private field in |
1594 | * which the client can keep state. |
1595 | */ |
8eebd221 |
1596 | static void sk_tcp_set_private_ptr(Socket sock, void *ptr) |
32874aea |
1597 | { |
7e78000d |
1598 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1599 | s->private_ptr = ptr; |
1600 | } |
32874aea |
1601 | |
8eebd221 |
1602 | static void *sk_tcp_get_private_ptr(Socket sock) |
32874aea |
1603 | { |
7e78000d |
1604 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1605 | return s->private_ptr; |
1606 | } |
1607 | |
1608 | /* |
1609 | * Special error values are returned from sk_namelookup and sk_new |
1610 | * if there's a problem. These functions extract an error message, |
1611 | * or return NULL if there's no problem. |
1612 | */ |
cbe2d68f |
1613 | const char *sk_addr_error(SockAddr addr) |
32874aea |
1614 | { |
2f75bae1 |
1615 | return addr->error; |
1616 | } |
cbe2d68f |
1617 | static const char *sk_tcp_socket_error(Socket sock) |
32874aea |
1618 | { |
7e78000d |
1619 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1620 | return s->error; |
1621 | } |
1622 | |
8eebd221 |
1623 | static void sk_tcp_set_frozen(Socket sock, int is_frozen) |
d74d141c |
1624 | { |
1625 | Actual_Socket s = (Actual_Socket) sock; |
5471d09a |
1626 | if (s->frozen == is_frozen) |
1627 | return; |
d74d141c |
1628 | s->frozen = is_frozen; |
615cdc1f |
1629 | if (!is_frozen) { |
1630 | do_select(s->s, 1); |
1631 | if (s->frozen_readable) { |
1632 | char c; |
1633 | p_recv(s->s, &c, 1, MSG_PEEK); |
1634 | } |
d74d141c |
1635 | } |
5471d09a |
1636 | s->frozen_readable = 0; |
d74d141c |
1637 | } |
1638 | |
9f7ebadc |
1639 | void socket_reselect_all(void) |
1640 | { |
1641 | Actual_Socket s; |
1642 | int i; |
1643 | |
1644 | for (i = 0; (s = index234(sktree, i)) != NULL; i++) { |
1645 | if (!s->frozen) |
1646 | do_select(s->s, 1); |
1647 | } |
1648 | } |
1649 | |
2f75bae1 |
1650 | /* |
1651 | * For Plink: enumerate all sockets currently active. |
1652 | */ |
32874aea |
1653 | SOCKET first_socket(int *state) |
1654 | { |
d2371c81 |
1655 | Actual_Socket s; |
1656 | *state = 0; |
1657 | s = index234(sktree, (*state)++); |
2f75bae1 |
1658 | return s ? s->s : INVALID_SOCKET; |
1659 | } |
32874aea |
1660 | |
1661 | SOCKET next_socket(int *state) |
1662 | { |
d2371c81 |
1663 | Actual_Socket s = index234(sktree, (*state)++); |
2f75bae1 |
1664 | return s ? s->s : INVALID_SOCKET; |
1665 | } |
68a49acb |
1666 | |
39934deb |
1667 | extern int socket_writable(SOCKET skt) |
1668 | { |
1669 | Actual_Socket s = find234(sktree, (void *)skt, cmpforsearch); |
1670 | |
1671 | if (s) |
1672 | return bufchain_size(&s->output_data) > 0; |
1673 | else |
1674 | return 0; |
1675 | } |
1676 | |
68a49acb |
1677 | int net_service_lookup(char *service) |
1678 | { |
1679 | struct servent *se; |
7440fd44 |
1680 | se = p_getservbyname(service, NULL); |
68a49acb |
1681 | if (se != NULL) |
7440fd44 |
1682 | return p_ntohs(se->s_port); |
68a49acb |
1683 | else |
1684 | return 0; |
1685 | } |
fc0f17db |
1686 | |
48806a46 |
1687 | SockAddr platform_get_x11_unix_address(const char *display, int displaynum, |
1688 | char **canonicalname) |
fc0f17db |
1689 | { |
1690 | SockAddr ret = snew(struct SockAddr_tag); |
1691 | memset(ret, 0, sizeof(struct SockAddr_tag)); |
1692 | ret->error = "unix sockets not supported on this platform"; |
5025a993 |
1693 | ret->refcount = 1; |
fc0f17db |
1694 | return ret; |
1695 | } |