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 | |
2f75bae1 |
37 | struct Socket_tag { |
c85623f9 |
38 | const struct socket_function_table *fn; |
7e78000d |
39 | /* the above variable absolutely *must* be the first in this structure */ |
2f75bae1 |
40 | char *error; |
41 | SOCKET s; |
7e78000d |
42 | Plug plug; |
2f75bae1 |
43 | void *private_ptr; |
5471d09a |
44 | bufchain output_data; |
3ad9d396 |
45 | int connected; |
2f75bae1 |
46 | int writable; |
5471d09a |
47 | int frozen; /* this causes readability notifications to be ignored */ |
48 | int frozen_readable; /* this means we missed at least one readability |
49 | * notification while we were frozen */ |
bc4802a1 |
50 | int localhost_only; /* for listening sockets */ |
5471d09a |
51 | char oobdata[1]; |
1ad4eb6f |
52 | int sending_oob; |
7555d6a5 |
53 | int oobinline, nodelay, keepalive, privport; |
54 | SockAddr addr; |
55 | int port; |
7732d38a |
56 | int pending_error; /* in case send() returns error */ |
ae400b95 |
57 | /* |
58 | * We sometimes need pairs of Socket structures to be linked: |
59 | * if we are listening on the same IPv6 and v4 port, for |
60 | * example. So here we define `parent' and `child' pointers to |
61 | * track this link. |
62 | */ |
63 | Actual_Socket parent, child; |
2f75bae1 |
64 | }; |
65 | |
66 | struct SockAddr_tag { |
67 | char *error; |
b7a189f3 |
68 | /* |
69 | * Which address family this address belongs to. AF_INET for |
70 | * IPv4; AF_INET6 for IPv6; AF_UNSPEC indicates that name |
71 | * resolution has not been done and a simple host name is held |
72 | * in this SockAddr structure. |
05581745 |
73 | * The hostname field is also used when the hostname has both |
74 | * an IPv6 and IPv4 address and the IPv6 connection attempt |
75 | * fails. We then try the IPv4 address. |
76 | * This 'family' should become an option in the GUI and |
77 | * on the commandline for selecting a default protocol. |
b7a189f3 |
78 | */ |
32874aea |
79 | int family; |
05581745 |
80 | #ifndef NO_IPV6 |
7555d6a5 |
81 | struct addrinfo *ais; /* Addresses IPv6 style. */ |
82 | struct addrinfo *ai; /* steps along the linked list */ |
c4d8e107 |
83 | #endif |
7555d6a5 |
84 | unsigned long *addresses; /* Addresses IPv4 style. */ |
85 | int naddresses, curraddr; |
b7a189f3 |
86 | char hostname[512]; /* Store an unresolved host name. */ |
2f75bae1 |
87 | }; |
88 | |
2f75bae1 |
89 | static tree234 *sktree; |
90 | |
32874aea |
91 | static int cmpfortree(void *av, void *bv) |
92 | { |
93 | Actual_Socket a = (Actual_Socket) av, b = (Actual_Socket) bv; |
94 | unsigned long as = (unsigned long) a->s, bs = (unsigned long) b->s; |
95 | if (as < bs) |
96 | return -1; |
97 | if (as > bs) |
98 | return +1; |
2f75bae1 |
99 | return 0; |
100 | } |
101 | |
32874aea |
102 | static int cmpforsearch(void *av, void *bv) |
103 | { |
104 | Actual_Socket b = (Actual_Socket) bv; |
105 | unsigned long as = (unsigned long) av, bs = (unsigned long) b->s; |
106 | if (as < bs) |
107 | return -1; |
108 | if (as > bs) |
109 | return +1; |
2f75bae1 |
110 | return 0; |
111 | } |
112 | |
7440fd44 |
113 | #define NOTHING |
114 | #define DECL_WINSOCK_FUNCTION(linkage, rettype, name, params) \ |
115 | typedef rettype (WINAPI *t_##name) params; \ |
116 | linkage t_##name p_##name |
7555d6a5 |
117 | #define GET_WINSOCK_FUNCTION(module, name) \ |
118 | p_##name = (t_##name) GetProcAddress(module, #name) |
7440fd44 |
119 | |
120 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAAsyncSelect, |
121 | (SOCKET, HWND, u_int, long)); |
122 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAEventSelect, (SOCKET, WSAEVENT, long)); |
123 | DECL_WINSOCK_FUNCTION(NOTHING, int, select, |
124 | (int, fd_set FAR *, fd_set FAR *, |
125 | fd_set FAR *, const struct timeval FAR *)); |
126 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAGetLastError, (void)); |
127 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAEnumNetworkEvents, |
128 | (SOCKET, WSAEVENT, LPWSANETWORKEVENTS)); |
129 | DECL_WINSOCK_FUNCTION(static, int, WSAStartup, (WORD, LPWSADATA)); |
130 | DECL_WINSOCK_FUNCTION(static, int, WSACleanup, (void)); |
131 | DECL_WINSOCK_FUNCTION(static, int, closesocket, (SOCKET)); |
132 | DECL_WINSOCK_FUNCTION(static, u_long, ntohl, (u_long)); |
133 | DECL_WINSOCK_FUNCTION(static, u_long, htonl, (u_long)); |
134 | DECL_WINSOCK_FUNCTION(static, u_short, htons, (u_short)); |
135 | DECL_WINSOCK_FUNCTION(static, u_short, ntohs, (u_short)); |
136 | DECL_WINSOCK_FUNCTION(static, struct hostent FAR *, gethostbyname, |
137 | (const char FAR *)); |
138 | DECL_WINSOCK_FUNCTION(static, struct servent FAR *, getservbyname, |
139 | (const char FAR *, const char FAR *)); |
140 | DECL_WINSOCK_FUNCTION(static, unsigned long, inet_addr, (const char FAR *)); |
141 | DECL_WINSOCK_FUNCTION(static, char FAR *, inet_ntoa, (struct in_addr)); |
142 | DECL_WINSOCK_FUNCTION(static, int, connect, |
143 | (SOCKET, const struct sockaddr FAR *, int)); |
144 | DECL_WINSOCK_FUNCTION(static, int, bind, |
145 | (SOCKET, const struct sockaddr FAR *, int)); |
146 | DECL_WINSOCK_FUNCTION(static, int, setsockopt, |
147 | (SOCKET, int, int, const char FAR *, int)); |
148 | DECL_WINSOCK_FUNCTION(static, SOCKET, socket, (int, int, int)); |
149 | DECL_WINSOCK_FUNCTION(static, int, listen, (SOCKET, int)); |
150 | DECL_WINSOCK_FUNCTION(static, int, send, (SOCKET, const char FAR *, int, int)); |
151 | DECL_WINSOCK_FUNCTION(static, int, ioctlsocket, |
152 | (SOCKET, long, u_long FAR *)); |
153 | DECL_WINSOCK_FUNCTION(static, SOCKET, accept, |
154 | (SOCKET, struct sockaddr FAR *, int FAR *)); |
155 | DECL_WINSOCK_FUNCTION(static, int, recv, (SOCKET, char FAR *, int, int)); |
a143ea0a |
156 | DECL_WINSOCK_FUNCTION(static, int, WSAIoctl, |
157 | (SOCKET, DWORD, LPVOID, DWORD, LPVOID, DWORD, |
158 | LPDWORD, LPWSAOVERLAPPED, |
159 | LPWSAOVERLAPPED_COMPLETION_ROUTINE)); |
7555d6a5 |
160 | #ifndef NO_IPV6 |
161 | DECL_WINSOCK_FUNCTION(static, int, getaddrinfo, |
162 | (const char *nodename, const char *servname, |
163 | const struct addrinfo *hints, struct addrinfo **res)); |
164 | DECL_WINSOCK_FUNCTION(static, void, freeaddrinfo, (struct addrinfo *res)); |
165 | DECL_WINSOCK_FUNCTION(static, int, getnameinfo, |
166 | (const struct sockaddr FAR * sa, socklen_t salen, |
167 | char FAR * host, size_t hostlen, char FAR * serv, |
168 | size_t servlen, int flags)); |
169 | #endif |
7440fd44 |
170 | |
171 | static HMODULE winsock_module; |
7555d6a5 |
172 | #ifndef NO_IPV6 |
173 | static HMODULE wship6_module; |
174 | #endif |
7440fd44 |
175 | |
32874aea |
176 | void sk_init(void) |
177 | { |
7440fd44 |
178 | WORD winsock_ver; |
179 | WSADATA wsadata; |
180 | |
181 | winsock_ver = MAKEWORD(2, 0); |
182 | winsock_module = LoadLibrary("WS2_32.DLL"); |
183 | if (!winsock_module) { |
184 | winsock_module = LoadLibrary("WSOCK32.DLL"); |
185 | winsock_ver = MAKEWORD(1, 1); |
186 | } |
187 | if (!winsock_module) |
188 | fatalbox("Unable to load any WinSock library"); |
189 | |
7555d6a5 |
190 | #ifndef NO_IPV6 |
191 | wship6_module = LoadLibrary("wship6.dll"); |
192 | if (wship6_module) { |
193 | GET_WINSOCK_FUNCTION(wship6_module, getaddrinfo); |
194 | GET_WINSOCK_FUNCTION(wship6_module, freeaddrinfo); |
195 | GET_WINSOCK_FUNCTION(wship6_module, getnameinfo); |
196 | } |
197 | #endif |
198 | |
199 | GET_WINSOCK_FUNCTION(winsock_module, WSAAsyncSelect); |
200 | GET_WINSOCK_FUNCTION(winsock_module, WSAEventSelect); |
201 | GET_WINSOCK_FUNCTION(winsock_module, select); |
202 | GET_WINSOCK_FUNCTION(winsock_module, WSAGetLastError); |
203 | GET_WINSOCK_FUNCTION(winsock_module, WSAEnumNetworkEvents); |
204 | GET_WINSOCK_FUNCTION(winsock_module, WSAStartup); |
205 | GET_WINSOCK_FUNCTION(winsock_module, WSACleanup); |
206 | GET_WINSOCK_FUNCTION(winsock_module, closesocket); |
207 | GET_WINSOCK_FUNCTION(winsock_module, ntohl); |
208 | GET_WINSOCK_FUNCTION(winsock_module, htonl); |
209 | GET_WINSOCK_FUNCTION(winsock_module, htons); |
210 | GET_WINSOCK_FUNCTION(winsock_module, ntohs); |
211 | GET_WINSOCK_FUNCTION(winsock_module, gethostbyname); |
212 | GET_WINSOCK_FUNCTION(winsock_module, getservbyname); |
213 | GET_WINSOCK_FUNCTION(winsock_module, inet_addr); |
214 | GET_WINSOCK_FUNCTION(winsock_module, inet_ntoa); |
215 | GET_WINSOCK_FUNCTION(winsock_module, connect); |
216 | GET_WINSOCK_FUNCTION(winsock_module, bind); |
217 | GET_WINSOCK_FUNCTION(winsock_module, setsockopt); |
218 | GET_WINSOCK_FUNCTION(winsock_module, socket); |
219 | GET_WINSOCK_FUNCTION(winsock_module, listen); |
220 | GET_WINSOCK_FUNCTION(winsock_module, send); |
221 | GET_WINSOCK_FUNCTION(winsock_module, ioctlsocket); |
222 | GET_WINSOCK_FUNCTION(winsock_module, accept); |
223 | GET_WINSOCK_FUNCTION(winsock_module, recv); |
224 | GET_WINSOCK_FUNCTION(winsock_module, WSAIoctl); |
7440fd44 |
225 | |
226 | if (p_WSAStartup(winsock_ver, &wsadata)) { |
227 | fatalbox("Unable to initialise WinSock"); |
228 | } |
229 | if (LOBYTE(wsadata.wVersion) != LOBYTE(winsock_ver)) { |
230 | p_WSACleanup(); |
231 | fatalbox("WinSock version is incompatible with %d.%d", |
232 | LOBYTE(winsock_ver), HIBYTE(winsock_ver)); |
233 | } |
234 | |
2f75bae1 |
235 | sktree = newtree234(cmpfortree); |
236 | } |
237 | |
93b581bd |
238 | void sk_cleanup(void) |
239 | { |
240 | Actual_Socket s; |
241 | int i; |
242 | |
243 | if (sktree) { |
244 | for (i = 0; (s = index234(sktree, i)) != NULL; i++) { |
7440fd44 |
245 | p_closesocket(s->s); |
93b581bd |
246 | } |
679539d7 |
247 | freetree234(sktree); |
248 | sktree = NULL; |
93b581bd |
249 | } |
7440fd44 |
250 | |
251 | p_WSACleanup(); |
252 | if (winsock_module) |
253 | FreeLibrary(winsock_module); |
7555d6a5 |
254 | if (wship6_module) |
255 | FreeLibrary(wship6_module); |
93b581bd |
256 | } |
257 | |
32874aea |
258 | char *winsock_error_string(int error) |
259 | { |
e74fbad9 |
260 | switch (error) { |
32874aea |
261 | case WSAEACCES: |
262 | return "Network error: Permission denied"; |
263 | case WSAEADDRINUSE: |
264 | return "Network error: Address already in use"; |
265 | case WSAEADDRNOTAVAIL: |
266 | return "Network error: Cannot assign requested address"; |
267 | case WSAEAFNOSUPPORT: |
268 | return |
269 | "Network error: Address family not supported by protocol family"; |
270 | case WSAEALREADY: |
271 | return "Network error: Operation already in progress"; |
272 | case WSAECONNABORTED: |
273 | return "Network error: Software caused connection abort"; |
274 | case WSAECONNREFUSED: |
275 | return "Network error: Connection refused"; |
276 | case WSAECONNRESET: |
277 | return "Network error: Connection reset by peer"; |
278 | case WSAEDESTADDRREQ: |
279 | return "Network error: Destination address required"; |
280 | case WSAEFAULT: |
281 | return "Network error: Bad address"; |
282 | case WSAEHOSTDOWN: |
283 | return "Network error: Host is down"; |
284 | case WSAEHOSTUNREACH: |
285 | return "Network error: No route to host"; |
286 | case WSAEINPROGRESS: |
287 | return "Network error: Operation now in progress"; |
288 | case WSAEINTR: |
289 | return "Network error: Interrupted function call"; |
290 | case WSAEINVAL: |
291 | return "Network error: Invalid argument"; |
292 | case WSAEISCONN: |
293 | return "Network error: Socket is already connected"; |
294 | case WSAEMFILE: |
295 | return "Network error: Too many open files"; |
296 | case WSAEMSGSIZE: |
297 | return "Network error: Message too long"; |
298 | case WSAENETDOWN: |
299 | return "Network error: Network is down"; |
300 | case WSAENETRESET: |
301 | return "Network error: Network dropped connection on reset"; |
302 | case WSAENETUNREACH: |
303 | return "Network error: Network is unreachable"; |
304 | case WSAENOBUFS: |
305 | return "Network error: No buffer space available"; |
306 | case WSAENOPROTOOPT: |
307 | return "Network error: Bad protocol option"; |
308 | case WSAENOTCONN: |
309 | return "Network error: Socket is not connected"; |
310 | case WSAENOTSOCK: |
311 | return "Network error: Socket operation on non-socket"; |
312 | case WSAEOPNOTSUPP: |
313 | return "Network error: Operation not supported"; |
314 | case WSAEPFNOSUPPORT: |
315 | return "Network error: Protocol family not supported"; |
316 | case WSAEPROCLIM: |
317 | return "Network error: Too many processes"; |
318 | case WSAEPROTONOSUPPORT: |
319 | return "Network error: Protocol not supported"; |
320 | case WSAEPROTOTYPE: |
321 | return "Network error: Protocol wrong type for socket"; |
322 | case WSAESHUTDOWN: |
323 | return "Network error: Cannot send after socket shutdown"; |
324 | case WSAESOCKTNOSUPPORT: |
325 | return "Network error: Socket type not supported"; |
326 | case WSAETIMEDOUT: |
327 | return "Network error: Connection timed out"; |
328 | case WSAEWOULDBLOCK: |
329 | return "Network error: Resource temporarily unavailable"; |
330 | case WSAEDISCON: |
331 | return "Network error: Graceful shutdown in progress"; |
332 | default: |
333 | return "Unknown network error"; |
e74fbad9 |
334 | } |
335 | } |
336 | |
05581745 |
337 | SockAddr sk_namelookup(const char *host, char **canonicalname, |
338 | int address_family) |
c4d8e107 |
339 | { |
3d88e64d |
340 | SockAddr ret = snew(struct SockAddr_tag); |
2f75bae1 |
341 | unsigned long a; |
c4d8e107 |
342 | struct hostent *h = NULL; |
6e1ebb76 |
343 | char realhost[8192]; |
38bd69cd |
344 | int ret_family; |
345 | int err; |
2f75bae1 |
346 | |
c4d8e107 |
347 | /* Clear the structure and default to IPv4. */ |
348 | memset(ret, 0, sizeof(struct SockAddr_tag)); |
05581745 |
349 | ret->family = (address_family == ADDRTYPE_IPV4 ? AF_INET : |
350 | #ifndef NO_IPV6 |
351 | address_family == ADDRTYPE_IPV6 ? AF_INET6 : |
352 | #endif |
353 | AF_UNSPEC); |
38bd69cd |
354 | ret_family = AF_UNSPEC; |
6e1ebb76 |
355 | *realhost = '\0'; |
c4d8e107 |
356 | |
7440fd44 |
357 | if ((a = p_inet_addr(host)) == (unsigned long) INADDR_NONE) { |
05581745 |
358 | #ifndef NO_IPV6 |
c4d8e107 |
359 | /* |
7555d6a5 |
360 | * Use getaddrinfo when it's available |
c4d8e107 |
361 | */ |
7555d6a5 |
362 | if (p_getaddrinfo) { |
38bd69cd |
363 | struct addrinfo hints; |
364 | memset(&hints, 0, sizeof(hints)); |
365 | hints.ai_family = ret->family; |
7555d6a5 |
366 | if ((err = p_getaddrinfo(host, NULL, &hints, &ret->ais)) == 0) |
367 | ret_family = ret->ais->ai_family; |
368 | ret->ai = ret->ais; |
32874aea |
369 | } else |
c4d8e107 |
370 | #endif |
32874aea |
371 | { |
c4d8e107 |
372 | /* |
373 | * Otherwise use the IPv4-only gethostbyname... |
05581745 |
374 | * (NOTE: we don't use gethostbyname as a fallback!) |
c4d8e107 |
375 | */ |
38bd69cd |
376 | if ( (h = p_gethostbyname(host)) ) |
377 | ret_family = AF_INET; |
378 | else |
379 | err = p_WSAGetLastError(); |
c4d8e107 |
380 | } |
c4d8e107 |
381 | |
38bd69cd |
382 | if (ret_family == AF_UNSPEC) { |
c4d8e107 |
383 | ret->error = (err == WSAENETDOWN ? "Network is down" : |
38bd69cd |
384 | err == WSAHOST_NOT_FOUND ? "Host does not exist" : |
385 | err == WSATRY_AGAIN ? "Host not found" : |
05581745 |
386 | #ifndef NO_IPV6 |
7555d6a5 |
387 | p_getaddrinfo ? "getaddrinfo: unknown error" : |
c4d8e107 |
388 | #endif |
389 | "gethostbyname: unknown error"); |
32874aea |
390 | } else { |
c4d8e107 |
391 | ret->error = NULL; |
38bd69cd |
392 | ret->family = ret_family; |
c4d8e107 |
393 | |
05581745 |
394 | #ifndef NO_IPV6 |
c4d8e107 |
395 | /* If we got an address info use that... */ |
32874aea |
396 | if (ret->ai) { |
c4d8e107 |
397 | /* Are we in IPv4 fallback mode? */ |
398 | /* We put the IPv4 address into the a variable so we can further-on use the IPv4 code... */ |
399 | if (ret->family == AF_INET) |
32874aea |
400 | memcpy(&a, |
401 | (char *) &((SOCKADDR_IN *) ret->ai-> |
402 | ai_addr)->sin_addr, sizeof(a)); |
c4d8e107 |
403 | |
404 | /* Now let's find that canonicalname... */ |
7555d6a5 |
405 | if (p_getnameinfo) { |
406 | if (p_getnameinfo |
32874aea |
407 | ((struct sockaddr *) ret->ai->ai_addr, |
408 | ret->family == |
409 | AF_INET ? sizeof(SOCKADDR_IN) : |
6e1ebb76 |
410 | sizeof(SOCKADDR_IN6), realhost, |
411 | sizeof(realhost), NULL, 0, 0) != 0) { |
412 | strncpy(realhost, host, sizeof(realhost)); |
c4d8e107 |
413 | } |
414 | } |
415 | } |
416 | /* We used the IPv4-only gethostbyname()... */ |
417 | else |
c4d8e107 |
418 | #endif |
32874aea |
419 | { |
7555d6a5 |
420 | int n; |
421 | for (n = 0; h->h_addr_list[n]; n++); |
422 | ret->addresses = snewn(n, unsigned long); |
423 | ret->naddresses = n; |
424 | for (n = 0; n < ret->naddresses; n++) { |
425 | memcpy(&a, h->h_addr_list[n], sizeof(a)); |
426 | ret->addresses[n] = p_ntohl(a); |
427 | } |
428 | ret->curraddr = 0; |
c4d8e107 |
429 | memcpy(&a, h->h_addr, sizeof(a)); |
430 | /* This way we are always sure the h->h_name is valid :) */ |
6e1ebb76 |
431 | strncpy(realhost, h->h_name, sizeof(realhost)); |
c4d8e107 |
432 | } |
c4d8e107 |
433 | } |
32874aea |
434 | } else { |
87ed061f |
435 | /* |
436 | * This must be a numeric IPv4 address because it caused a |
437 | * success return from inet_addr. |
438 | */ |
7555d6a5 |
439 | ret->addresses = snewn(1, unsigned long); |
440 | ret->naddresses = 1; |
441 | ret->curraddr = 0; |
442 | ret->addresses[0] = p_ntohl(a); |
32874aea |
443 | ret->family = AF_INET; |
6e1ebb76 |
444 | strncpy(realhost, host, sizeof(realhost)); |
2f75bae1 |
445 | } |
6e1ebb76 |
446 | realhost[lenof(realhost)-1] = '\0'; |
3d88e64d |
447 | *canonicalname = snewn(1+strlen(realhost), char); |
6e1ebb76 |
448 | strcpy(*canonicalname, realhost); |
2f75bae1 |
449 | return ret; |
450 | } |
451 | |
e8fa8f62 |
452 | SockAddr sk_nonamelookup(const char *host) |
b7a189f3 |
453 | { |
3d88e64d |
454 | SockAddr ret = snew(struct SockAddr_tag); |
ab0873ab |
455 | ret->error = NULL; |
b7a189f3 |
456 | ret->family = AF_UNSPEC; |
457 | strncpy(ret->hostname, host, lenof(ret->hostname)); |
458 | ret->hostname[lenof(ret->hostname)-1] = '\0'; |
459 | return ret; |
460 | } |
461 | |
7555d6a5 |
462 | int sk_nextaddr(SockAddr addr) |
463 | { |
464 | #ifndef NO_IPV6 |
465 | if (addr->ai) { |
466 | if (addr->ai->ai_next) { |
467 | addr->ai = addr->ai->ai_next; |
468 | addr->family = addr->ai->ai_family; |
469 | return TRUE; |
470 | } else |
471 | return FALSE; |
472 | } |
473 | #endif |
474 | if (addr->curraddr+1 < addr->naddresses) { |
475 | addr->curraddr++; |
476 | return TRUE; |
477 | } else { |
478 | return FALSE; |
479 | } |
480 | } |
481 | |
3ad9d396 |
482 | void sk_getaddr(SockAddr addr, char *buf, int buflen) |
483 | { |
05581745 |
484 | #ifndef NO_IPV6 |
7555d6a5 |
485 | if (addr->ai) { |
05581745 |
486 | /* Try to get the WSAAddressToStringA() function from wship6.dll */ |
487 | /* This way one doesn't need to have IPv6 dll's to use PuTTY and |
488 | * it will fallback to IPv4. */ |
489 | typedef int (CALLBACK * FADDRTOSTR) (LPSOCKADDR lpsaAddress, |
490 | DWORD dwAddressLength, |
491 | LPWSAPROTOCOL_INFO lpProtocolInfo, |
492 | OUT LPTSTR lpszAddressString, |
493 | IN OUT LPDWORD lpdwAddressStringLength |
494 | ); |
495 | FADDRTOSTR fAddrToStr = NULL; |
496 | |
497 | HINSTANCE dllWS2 = LoadLibrary("ws2_32.dll"); |
498 | if (dllWS2) { |
499 | fAddrToStr = (FADDRTOSTR)GetProcAddress(dllWS2, |
500 | "WSAAddressToStringA"); |
501 | if (fAddrToStr) { |
502 | fAddrToStr(addr->ai->ai_addr, addr->ai->ai_addrlen, |
503 | NULL, buf, &buflen); |
504 | } |
505 | else strncpy(buf, "IPv6", buflen); |
506 | FreeLibrary(dllWS2); |
507 | } |
b7a189f3 |
508 | } else |
3ad9d396 |
509 | #endif |
b7a189f3 |
510 | if (addr->family == AF_INET) { |
3ad9d396 |
511 | struct in_addr a; |
7555d6a5 |
512 | assert(addr->addresses && addr->curraddr < addr->naddresses); |
513 | a.s_addr = p_htonl(addr->addresses[addr->curraddr]); |
7440fd44 |
514 | strncpy(buf, p_inet_ntoa(a), buflen); |
b7a189f3 |
515 | buf[buflen-1] = '\0'; |
3ad9d396 |
516 | } else { |
b7a189f3 |
517 | strncpy(buf, addr->hostname, buflen); |
518 | buf[buflen-1] = '\0'; |
3ad9d396 |
519 | } |
3ad9d396 |
520 | } |
521 | |
b804e1e5 |
522 | int sk_hostname_is_local(char *name) |
523 | { |
524 | return !strcmp(name, "localhost"); |
525 | } |
526 | |
a143ea0a |
527 | static INTERFACE_INFO local_interfaces[16]; |
528 | static int n_local_interfaces; /* 0=not yet, -1=failed, >0=number */ |
529 | |
530 | static int ipv4_is_local_addr(struct in_addr addr) |
531 | { |
532 | if (ipv4_is_loopback(addr)) |
533 | return 1; /* loopback addresses are local */ |
534 | if (!n_local_interfaces) { |
535 | SOCKET s = p_socket(AF_INET, SOCK_DGRAM, 0); |
536 | DWORD retbytes; |
537 | |
538 | if (p_WSAIoctl && |
539 | p_WSAIoctl(s, SIO_GET_INTERFACE_LIST, NULL, 0, |
540 | local_interfaces, sizeof(local_interfaces), |
541 | &retbytes, NULL, NULL) == 0) |
542 | n_local_interfaces = retbytes / sizeof(INTERFACE_INFO); |
543 | else |
544 | logevent(NULL, "Unable to get list of local IP addresses"); |
545 | } |
546 | if (n_local_interfaces > 0) { |
547 | int i; |
548 | for (i = 0; i < n_local_interfaces; i++) { |
549 | SOCKADDR_IN *address = |
550 | (SOCKADDR_IN *)&local_interfaces[i].iiAddress; |
551 | if (address->sin_addr.s_addr == addr.s_addr) |
552 | return 1; /* this address is local */ |
553 | } |
554 | } |
555 | return 0; /* this address is not local */ |
556 | } |
557 | |
b804e1e5 |
558 | int sk_address_is_local(SockAddr addr) |
559 | { |
05581745 |
560 | #ifndef NO_IPV6 |
b7a189f3 |
561 | if (addr->family == AF_INET6) { |
05581745 |
562 | return IN6_IS_ADDR_LOOPBACK((const struct in6_addr *)addr->ai->ai_addr); |
b7a189f3 |
563 | } else |
b804e1e5 |
564 | #endif |
b7a189f3 |
565 | if (addr->family == AF_INET) { |
b804e1e5 |
566 | struct in_addr a; |
7555d6a5 |
567 | assert(addr->addresses && addr->curraddr < addr->naddresses); |
568 | a.s_addr = p_htonl(addr->addresses[addr->curraddr]); |
a143ea0a |
569 | return ipv4_is_local_addr(a); |
b804e1e5 |
570 | } else { |
b7a189f3 |
571 | assert(addr->family == AF_UNSPEC); |
572 | return 0; /* we don't know; assume not */ |
b804e1e5 |
573 | } |
b804e1e5 |
574 | } |
575 | |
6971bbe7 |
576 | int sk_addrtype(SockAddr addr) |
577 | { |
b7a189f3 |
578 | return (addr->family == AF_INET ? ADDRTYPE_IPV4 : |
05581745 |
579 | #ifndef NO_IPV6 |
b7a189f3 |
580 | addr->family == AF_INET6 ? ADDRTYPE_IPV6 : |
581 | #endif |
582 | ADDRTYPE_NAME); |
6971bbe7 |
583 | } |
584 | |
585 | void sk_addrcopy(SockAddr addr, char *buf) |
586 | { |
b7a189f3 |
587 | assert(addr->family != AF_UNSPEC); |
05581745 |
588 | #ifndef NO_IPV6 |
7555d6a5 |
589 | if (addr->ai) { |
590 | if (addr->family == AF_INET) |
591 | memcpy(buf, &((struct sockaddr_in *)addr->ai->ai_addr)->sin_addr, |
592 | sizeof(struct in_addr)); |
593 | else if (addr->family == AF_INET6) |
594 | memcpy(buf, &((struct sockaddr_in6 *)addr->ai->ai_addr)->sin6_addr, |
595 | sizeof(struct in6_addr)); |
596 | else |
597 | assert(FALSE); |
b7a189f3 |
598 | } else |
6971bbe7 |
599 | #endif |
b7a189f3 |
600 | if (addr->family == AF_INET) { |
6971bbe7 |
601 | struct in_addr a; |
7555d6a5 |
602 | assert(addr->addresses && addr->curraddr < addr->naddresses); |
603 | a.s_addr = p_htonl(addr->addresses[addr->curraddr]); |
96d9eb89 |
604 | memcpy(buf, (char*) &a.s_addr, 4); |
6971bbe7 |
605 | } |
6971bbe7 |
606 | } |
607 | |
32874aea |
608 | void sk_addr_free(SockAddr addr) |
609 | { |
7555d6a5 |
610 | #ifndef NO_IPV6 |
611 | if (addr->ais && p_freeaddrinfo) |
612 | p_freeaddrinfo(addr->ais); |
613 | #endif |
614 | if (addr->addresses) |
615 | sfree(addr->addresses); |
2f75bae1 |
616 | sfree(addr); |
617 | } |
618 | |
32874aea |
619 | static Plug sk_tcp_plug(Socket sock, Plug p) |
620 | { |
7e78000d |
621 | Actual_Socket s = (Actual_Socket) sock; |
622 | Plug ret = s->plug; |
32874aea |
623 | if (p) |
624 | s->plug = p; |
7e78000d |
625 | return ret; |
626 | } |
627 | |
32874aea |
628 | static void sk_tcp_flush(Socket s) |
629 | { |
7e78000d |
630 | /* |
631 | * We send data to the socket as soon as we can anyway, |
632 | * so we don't need to do anything here. :-) |
633 | */ |
634 | } |
635 | |
2d466ffd |
636 | static void sk_tcp_close(Socket s); |
e0e7dff8 |
637 | static int sk_tcp_write(Socket s, const char *data, int len); |
638 | static int sk_tcp_write_oob(Socket s, const char *data, int len); |
8eebd221 |
639 | static void sk_tcp_set_private_ptr(Socket s, void *ptr); |
640 | static void *sk_tcp_get_private_ptr(Socket s); |
641 | static void sk_tcp_set_frozen(Socket s, int is_frozen); |
cbe2d68f |
642 | static const char *sk_tcp_socket_error(Socket s); |
7e78000d |
643 | |
d74d141c |
644 | extern char *do_select(SOCKET skt, int startup); |
645 | |
646 | Socket sk_register(void *sock, Plug plug) |
647 | { |
c85623f9 |
648 | static const struct socket_function_table fn_table = { |
d74d141c |
649 | sk_tcp_plug, |
650 | sk_tcp_close, |
651 | sk_tcp_write, |
652 | sk_tcp_write_oob, |
653 | sk_tcp_flush, |
8eebd221 |
654 | sk_tcp_set_private_ptr, |
655 | sk_tcp_get_private_ptr, |
656 | sk_tcp_set_frozen, |
d74d141c |
657 | sk_tcp_socket_error |
658 | }; |
659 | |
660 | DWORD err; |
661 | char *errstr; |
662 | Actual_Socket ret; |
663 | |
664 | /* |
665 | * Create Socket structure. |
666 | */ |
3d88e64d |
667 | ret = snew(struct Socket_tag); |
d74d141c |
668 | ret->fn = &fn_table; |
669 | ret->error = NULL; |
670 | ret->plug = plug; |
5471d09a |
671 | bufchain_init(&ret->output_data); |
d74d141c |
672 | ret->writable = 1; /* to start with */ |
673 | ret->sending_oob = 0; |
674 | ret->frozen = 1; |
5471d09a |
675 | ret->frozen_readable = 0; |
bc4802a1 |
676 | ret->localhost_only = 0; /* unused, but best init anyway */ |
7732d38a |
677 | ret->pending_error = 0; |
ae400b95 |
678 | ret->parent = ret->child = NULL; |
7555d6a5 |
679 | ret->addr = NULL; |
d74d141c |
680 | |
681 | ret->s = (SOCKET)sock; |
682 | |
683 | if (ret->s == INVALID_SOCKET) { |
7440fd44 |
684 | err = p_WSAGetLastError(); |
d74d141c |
685 | ret->error = winsock_error_string(err); |
686 | return (Socket) ret; |
687 | } |
688 | |
689 | ret->oobinline = 0; |
690 | |
691 | /* Set up a select mechanism. This could be an AsyncSelect on a |
692 | * window, or an EventSelect on an event object. */ |
693 | errstr = do_select(ret->s, 1); |
694 | if (errstr) { |
695 | ret->error = errstr; |
696 | return (Socket) ret; |
697 | } |
698 | |
699 | add234(sktree, ret); |
700 | |
701 | return (Socket) ret; |
702 | } |
703 | |
7555d6a5 |
704 | static DWORD try_connect(Actual_Socket sock) |
7e78000d |
705 | { |
2f75bae1 |
706 | SOCKET s; |
05581745 |
707 | #ifndef NO_IPV6 |
c4d8e107 |
708 | SOCKADDR_IN6 a6; |
709 | #endif |
2f75bae1 |
710 | SOCKADDR_IN a; |
711 | DWORD err; |
712 | char *errstr; |
c91409da |
713 | short localport; |
7555d6a5 |
714 | int family; |
2f75bae1 |
715 | |
7555d6a5 |
716 | if (sock->s != INVALID_SOCKET) { |
717 | do_select(sock->s, 0); |
718 | p_closesocket(sock->s); |
719 | } |
720 | |
721 | plug_log(sock->plug, 0, sock->addr, sock->port, NULL, 0); |
2f75bae1 |
722 | |
723 | /* |
724 | * Open socket. |
725 | */ |
05581745 |
726 | #ifndef NO_IPV6 |
727 | /* Let's default to IPv6, this shouldn't hurt anybody |
728 | * If the stack supports IPv6 it will also allow IPv4 connections. */ |
7555d6a5 |
729 | if (sock->addr->ai) { |
730 | family = sock->addr->ai->ai_family; |
731 | } else |
05581745 |
732 | #endif |
7555d6a5 |
733 | { |
734 | /* Default to IPv4 */ |
735 | family = AF_INET; |
736 | } |
737 | |
738 | s = p_socket(family, SOCK_STREAM, 0); |
739 | sock->s = s; |
2f75bae1 |
740 | |
741 | if (s == INVALID_SOCKET) { |
7440fd44 |
742 | err = p_WSAGetLastError(); |
7555d6a5 |
743 | sock->error = winsock_error_string(err); |
744 | goto ret; |
2f75bae1 |
745 | } |
4b1e8acc |
746 | |
7555d6a5 |
747 | if (sock->oobinline) { |
1ad4eb6f |
748 | BOOL b = TRUE; |
7440fd44 |
749 | p_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (void *) &b, sizeof(b)); |
1ad4eb6f |
750 | } |
2f75bae1 |
751 | |
7555d6a5 |
752 | if (sock->nodelay) { |
2184a5d9 |
753 | BOOL b = TRUE; |
7440fd44 |
754 | p_setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (void *) &b, sizeof(b)); |
2184a5d9 |
755 | } |
756 | |
7555d6a5 |
757 | if (sock->keepalive) { |
79bf227b |
758 | BOOL b = TRUE; |
759 | p_setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *) &b, sizeof(b)); |
760 | } |
761 | |
2f75bae1 |
762 | /* |
763 | * Bind to local address. |
764 | */ |
7555d6a5 |
765 | if (sock->privport) |
32874aea |
766 | localport = 1023; /* count from 1023 downwards */ |
c4d8e107 |
767 | else |
32874aea |
768 | localport = 0; /* just use port 0 (ie winsock picks) */ |
c91409da |
769 | |
770 | /* Loop round trying to bind */ |
771 | while (1) { |
7555d6a5 |
772 | int sockcode; |
c91409da |
773 | |
05581745 |
774 | #ifndef NO_IPV6 |
7555d6a5 |
775 | if (family == AF_INET6) { |
32874aea |
776 | memset(&a6, 0, sizeof(a6)); |
777 | a6.sin6_family = AF_INET6; |
05581745 |
778 | /*a6.sin6_addr = in6addr_any; */ /* == 0 done by memset() */ |
7440fd44 |
779 | a6.sin6_port = p_htons(localport); |
32874aea |
780 | } else |
c4d8e107 |
781 | #endif |
32874aea |
782 | { |
783 | a.sin_family = AF_INET; |
7440fd44 |
784 | a.sin_addr.s_addr = p_htonl(INADDR_ANY); |
785 | a.sin_port = p_htons(localport); |
32874aea |
786 | } |
05581745 |
787 | #ifndef NO_IPV6 |
7555d6a5 |
788 | sockcode = p_bind(s, (sock->addr->family == AF_INET6 ? |
32874aea |
789 | (struct sockaddr *) &a6 : |
790 | (struct sockaddr *) &a), |
7555d6a5 |
791 | (sock->addr->family == |
32874aea |
792 | AF_INET6 ? sizeof(a6) : sizeof(a))); |
c4d8e107 |
793 | #else |
7555d6a5 |
794 | sockcode = p_bind(s, (struct sockaddr *) &a, sizeof(a)); |
c4d8e107 |
795 | #endif |
7555d6a5 |
796 | if (sockcode != SOCKET_ERROR) { |
32874aea |
797 | err = 0; |
798 | break; /* done */ |
799 | } else { |
7440fd44 |
800 | err = p_WSAGetLastError(); |
32874aea |
801 | if (err != WSAEADDRINUSE) /* failed, for a bad reason */ |
802 | break; |
803 | } |
804 | |
805 | if (localport == 0) |
806 | break; /* we're only looping once */ |
807 | localport--; |
808 | if (localport == 0) |
809 | break; /* we might have got to the end */ |
c91409da |
810 | } |
811 | |
32874aea |
812 | if (err) { |
7555d6a5 |
813 | sock->error = winsock_error_string(err); |
814 | goto ret; |
2f75bae1 |
815 | } |
816 | |
817 | /* |
818 | * Connect to remote address. |
819 | */ |
05581745 |
820 | #ifndef NO_IPV6 |
7555d6a5 |
821 | if (sock->addr->ai) { |
822 | if (family == AF_INET6) { |
823 | a6.sin6_family = AF_INET6; |
824 | a6.sin6_port = p_htons((short) sock->port); |
825 | a6.sin6_addr = |
826 | ((struct sockaddr_in6 *) sock->addr->ai->ai_addr)->sin6_addr; |
827 | } else { |
828 | a.sin_family = AF_INET; |
829 | a.sin_addr = |
830 | ((struct sockaddr_in *) sock->addr->ai->ai_addr)->sin_addr; |
831 | a.sin_port = p_htons((short) sock->port); |
832 | } |
32874aea |
833 | } else |
c4d8e107 |
834 | #endif |
32874aea |
835 | { |
7555d6a5 |
836 | assert(sock->addr->addresses && sock->addr->curraddr < sock->addr->naddresses); |
c4d8e107 |
837 | a.sin_family = AF_INET; |
7555d6a5 |
838 | a.sin_addr.s_addr = p_htonl(sock->addr->addresses[sock->addr->curraddr]); |
839 | a.sin_port = p_htons((short) sock->port); |
c4d8e107 |
840 | } |
3ad9d396 |
841 | |
842 | /* Set up a select mechanism. This could be an AsyncSelect on a |
843 | * window, or an EventSelect on an event object. */ |
844 | errstr = do_select(s, 1); |
845 | if (errstr) { |
7555d6a5 |
846 | sock->error = errstr; |
847 | err = 1; |
848 | goto ret; |
3ad9d396 |
849 | } |
850 | |
32874aea |
851 | if (( |
05581745 |
852 | #ifndef NO_IPV6 |
7555d6a5 |
853 | p_connect(s, |
854 | ((family == AF_INET6) ? (struct sockaddr *) &a6 : |
855 | (struct sockaddr *) &a), |
856 | (family == AF_INET6) ? sizeof(a6) : sizeof(a)) |
c4d8e107 |
857 | #else |
7440fd44 |
858 | p_connect(s, (struct sockaddr *) &a, sizeof(a)) |
c4d8e107 |
859 | #endif |
32874aea |
860 | ) == SOCKET_ERROR) { |
7440fd44 |
861 | err = p_WSAGetLastError(); |
3ad9d396 |
862 | /* |
863 | * We expect a potential EWOULDBLOCK here, because the |
864 | * chances are the front end has done a select for |
865 | * FD_CONNECT, so that connect() will complete |
866 | * asynchronously. |
867 | */ |
868 | if ( err != WSAEWOULDBLOCK ) { |
7555d6a5 |
869 | sock->error = winsock_error_string(err); |
870 | goto ret; |
3ad9d396 |
871 | } |
872 | } else { |
873 | /* |
874 | * If we _don't_ get EWOULDBLOCK, the connect has completed |
875 | * and we should set the socket as writable. |
876 | */ |
7555d6a5 |
877 | sock->writable = 1; |
2f75bae1 |
878 | } |
879 | |
7555d6a5 |
880 | add234(sktree, sock); |
2f75bae1 |
881 | |
7555d6a5 |
882 | err = 0; |
883 | |
884 | ret: |
885 | if (err) |
886 | plug_log(sock->plug, 1, sock->addr, sock->port, sock->error, err); |
887 | return err; |
888 | } |
889 | |
890 | Socket sk_new(SockAddr addr, int port, int privport, int oobinline, |
891 | int nodelay, int keepalive, Plug plug) |
892 | { |
893 | static const struct socket_function_table fn_table = { |
894 | sk_tcp_plug, |
895 | sk_tcp_close, |
896 | sk_tcp_write, |
897 | sk_tcp_write_oob, |
898 | sk_tcp_flush, |
899 | sk_tcp_set_private_ptr, |
900 | sk_tcp_get_private_ptr, |
901 | sk_tcp_set_frozen, |
902 | sk_tcp_socket_error |
903 | }; |
904 | |
905 | Actual_Socket ret; |
906 | DWORD err; |
907 | |
908 | /* |
909 | * Create Socket structure. |
910 | */ |
911 | ret = snew(struct Socket_tag); |
912 | ret->fn = &fn_table; |
913 | ret->error = NULL; |
914 | ret->plug = plug; |
915 | bufchain_init(&ret->output_data); |
916 | ret->connected = 0; /* to start with */ |
917 | ret->writable = 0; /* to start with */ |
918 | ret->sending_oob = 0; |
919 | ret->frozen = 0; |
920 | ret->frozen_readable = 0; |
921 | ret->localhost_only = 0; /* unused, but best init anyway */ |
922 | ret->pending_error = 0; |
923 | ret->parent = ret->child = NULL; |
924 | ret->oobinline = oobinline; |
925 | ret->nodelay = nodelay; |
926 | ret->keepalive = keepalive; |
927 | ret->privport = privport; |
928 | ret->port = port; |
929 | ret->addr = addr; |
930 | ret->s = INVALID_SOCKET; |
931 | |
932 | err = 0; |
933 | do { |
934 | err = try_connect(ret); |
935 | } while (err && sk_nextaddr(ret->addr)); |
f85e6f6e |
936 | |
7e78000d |
937 | return (Socket) ret; |
2f75bae1 |
938 | } |
939 | |
05581745 |
940 | Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only, |
ae400b95 |
941 | int orig_address_family) |
d74d141c |
942 | { |
c85623f9 |
943 | static const struct socket_function_table fn_table = { |
d74d141c |
944 | sk_tcp_plug, |
945 | sk_tcp_close, |
946 | sk_tcp_write, |
947 | sk_tcp_write_oob, |
948 | sk_tcp_flush, |
8eebd221 |
949 | sk_tcp_set_private_ptr, |
950 | sk_tcp_get_private_ptr, |
951 | sk_tcp_set_frozen, |
d74d141c |
952 | sk_tcp_socket_error |
953 | }; |
954 | |
955 | SOCKET s; |
05581745 |
956 | #ifndef NO_IPV6 |
d74d141c |
957 | SOCKADDR_IN6 a6; |
958 | #endif |
959 | SOCKADDR_IN a; |
05581745 |
960 | |
d74d141c |
961 | DWORD err; |
962 | char *errstr; |
963 | Actual_Socket ret; |
964 | int retcode; |
965 | int on = 1; |
966 | |
ae400b95 |
967 | int address_family; |
968 | |
d74d141c |
969 | /* |
970 | * Create Socket structure. |
971 | */ |
3d88e64d |
972 | ret = snew(struct Socket_tag); |
d74d141c |
973 | ret->fn = &fn_table; |
974 | ret->error = NULL; |
975 | ret->plug = plug; |
5471d09a |
976 | bufchain_init(&ret->output_data); |
d74d141c |
977 | ret->writable = 0; /* to start with */ |
978 | ret->sending_oob = 0; |
979 | ret->frozen = 0; |
5471d09a |
980 | ret->frozen_readable = 0; |
bc4802a1 |
981 | ret->localhost_only = local_host_only; |
7732d38a |
982 | ret->pending_error = 0; |
ae400b95 |
983 | ret->parent = ret->child = NULL; |
7555d6a5 |
984 | ret->addr = NULL; |
d74d141c |
985 | |
986 | /* |
05581745 |
987 | * Translate address_family from platform-independent constants |
988 | * into local reality. |
989 | */ |
ae400b95 |
990 | address_family = (orig_address_family == ADDRTYPE_IPV4 ? AF_INET : |
05581745 |
991 | #ifndef NO_IPV6 |
ae400b95 |
992 | orig_address_family == ADDRTYPE_IPV6 ? AF_INET6 : |
05581745 |
993 | #endif |
994 | AF_UNSPEC); |
ae400b95 |
995 | |
996 | /* |
997 | * Our default, if passed the `don't care' value |
998 | * ADDRTYPE_UNSPEC, is to listen on IPv4. If IPv6 is supported, |
999 | * we will also set up a second socket listening on IPv6, but |
1000 | * the v4 one is primary since that ought to work even on |
1001 | * non-v6-supporting systems. |
1002 | */ |
1003 | if (address_family == AF_UNSPEC) address_family = AF_INET; |
05581745 |
1004 | |
1005 | /* |
d74d141c |
1006 | * Open socket. |
1007 | */ |
05581745 |
1008 | s = p_socket(address_family, SOCK_STREAM, 0); |
d74d141c |
1009 | ret->s = s; |
1010 | |
1011 | if (s == INVALID_SOCKET) { |
7440fd44 |
1012 | err = p_WSAGetLastError(); |
d74d141c |
1013 | ret->error = winsock_error_string(err); |
1014 | return (Socket) ret; |
1015 | } |
1016 | |
1017 | ret->oobinline = 0; |
1018 | |
7440fd44 |
1019 | p_setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *)&on, sizeof(on)); |
d74d141c |
1020 | |
05581745 |
1021 | #ifndef NO_IPV6 |
1022 | if (address_family == AF_INET6) { |
d74d141c |
1023 | memset(&a6, 0, sizeof(a6)); |
1024 | a6.sin6_family = AF_INET6; |
6ee9b735 |
1025 | /* FIXME: srcaddr is ignored for IPv6, because I (SGT) don't |
05581745 |
1026 | * know how to do it. :-) |
1027 | * (jeroen:) saddr is specified as an address.. eg 2001:db8::1 |
1028 | * Thus we need either a parser that understands [2001:db8::1]:80 |
1029 | * style addresses and/or enhance this to understand hostnames too. */ |
bcce45ed |
1030 | if (local_host_only) |
1031 | a6.sin6_addr = in6addr_loopback; |
1032 | else |
1033 | a6.sin6_addr = in6addr_any; |
7440fd44 |
1034 | a6.sin6_port = p_htons(port); |
d74d141c |
1035 | } else |
1036 | #endif |
1037 | { |
6ee9b735 |
1038 | int got_addr = 0; |
d74d141c |
1039 | a.sin_family = AF_INET; |
6ee9b735 |
1040 | |
1041 | /* |
1042 | * Bind to source address. First try an explicitly |
1043 | * specified one... |
1044 | */ |
1045 | if (srcaddr) { |
7440fd44 |
1046 | a.sin_addr.s_addr = p_inet_addr(srcaddr); |
6ee9b735 |
1047 | if (a.sin_addr.s_addr != INADDR_NONE) { |
1048 | /* Override localhost_only with specified listen addr. */ |
1049 | ret->localhost_only = ipv4_is_loopback(a.sin_addr); |
1050 | got_addr = 1; |
1051 | } |
1052 | } |
1053 | |
1054 | /* |
1055 | * ... and failing that, go with one of the standard ones. |
1056 | */ |
1057 | if (!got_addr) { |
1058 | if (local_host_only) |
7440fd44 |
1059 | a.sin_addr.s_addr = p_htonl(INADDR_LOOPBACK); |
6ee9b735 |
1060 | else |
7440fd44 |
1061 | a.sin_addr.s_addr = p_htonl(INADDR_ANY); |
6ee9b735 |
1062 | } |
1063 | |
7440fd44 |
1064 | a.sin_port = p_htons((short)port); |
d74d141c |
1065 | } |
05581745 |
1066 | #ifndef NO_IPV6 |
1067 | retcode = p_bind(s, (address_family == AF_INET6 ? |
d74d141c |
1068 | (struct sockaddr *) &a6 : |
1069 | (struct sockaddr *) &a), |
05581745 |
1070 | (address_family == |
d74d141c |
1071 | AF_INET6 ? sizeof(a6) : sizeof(a))); |
1072 | #else |
7440fd44 |
1073 | retcode = p_bind(s, (struct sockaddr *) &a, sizeof(a)); |
d74d141c |
1074 | #endif |
1075 | if (retcode != SOCKET_ERROR) { |
1076 | err = 0; |
1077 | } else { |
7440fd44 |
1078 | err = p_WSAGetLastError(); |
d74d141c |
1079 | } |
1080 | |
1081 | if (err) { |
ae400b95 |
1082 | p_closesocket(s); |
d74d141c |
1083 | ret->error = winsock_error_string(err); |
1084 | return (Socket) ret; |
1085 | } |
1086 | |
1087 | |
7440fd44 |
1088 | if (p_listen(s, SOMAXCONN) == SOCKET_ERROR) { |
1089 | p_closesocket(s); |
d74d141c |
1090 | ret->error = winsock_error_string(err); |
1091 | return (Socket) ret; |
1092 | } |
1093 | |
1094 | /* Set up a select mechanism. This could be an AsyncSelect on a |
1095 | * window, or an EventSelect on an event object. */ |
1096 | errstr = do_select(s, 1); |
1097 | if (errstr) { |
ae400b95 |
1098 | p_closesocket(s); |
d74d141c |
1099 | ret->error = errstr; |
1100 | return (Socket) ret; |
1101 | } |
1102 | |
1103 | add234(sktree, ret); |
1104 | |
ae400b95 |
1105 | #ifndef NO_IPV6 |
1106 | /* |
1107 | * If we were given ADDRTYPE_UNSPEC, we must also create an |
1108 | * IPv6 listening socket and link it to this one. |
1109 | */ |
1110 | if (address_family == AF_INET && orig_address_family == ADDRTYPE_UNSPEC) { |
1111 | Actual_Socket other; |
1112 | |
1113 | other = (Actual_Socket) sk_newlistener(srcaddr, port, plug, |
1114 | local_host_only, ADDRTYPE_IPV6); |
1115 | |
1116 | if (other) { |
1117 | if (!other->error) { |
1118 | other->parent = ret; |
1119 | ret->child = other; |
1120 | } else { |
1121 | sfree(other); |
1122 | } |
1123 | } |
1124 | } |
1125 | #endif |
1126 | |
d74d141c |
1127 | return (Socket) ret; |
1128 | } |
1129 | |
32874aea |
1130 | static void sk_tcp_close(Socket sock) |
1131 | { |
9c964e85 |
1132 | extern char *do_select(SOCKET skt, int startup); |
7e78000d |
1133 | Actual_Socket s = (Actual_Socket) sock; |
9c964e85 |
1134 | |
ae400b95 |
1135 | if (s->child) |
1136 | sk_tcp_close((Socket)s->child); |
1137 | |
2f75bae1 |
1138 | del234(sktree, s); |
1139 | do_select(s->s, 0); |
7440fd44 |
1140 | p_closesocket(s->s); |
7555d6a5 |
1141 | if (s->addr) |
1142 | sk_addr_free(s->addr); |
dcbde236 |
1143 | sfree(s); |
2f75bae1 |
1144 | } |
1145 | |
2f75bae1 |
1146 | /* |
1147 | * The function which tries to send on a socket once it's deemed |
1148 | * writable. |
1149 | */ |
32874aea |
1150 | void try_send(Actual_Socket s) |
1151 | { |
5471d09a |
1152 | while (s->sending_oob || bufchain_size(&s->output_data) > 0) { |
2f75bae1 |
1153 | int nsent; |
1154 | DWORD err; |
5471d09a |
1155 | void *data; |
32874aea |
1156 | int len, urgentflag; |
1157 | |
1158 | if (s->sending_oob) { |
1159 | urgentflag = MSG_OOB; |
1160 | len = s->sending_oob; |
5471d09a |
1161 | data = &s->oobdata; |
32874aea |
1162 | } else { |
1163 | urgentflag = 0; |
5471d09a |
1164 | bufchain_prefix(&s->output_data, &data, &len); |
32874aea |
1165 | } |
7440fd44 |
1166 | nsent = p_send(s->s, data, len, urgentflag); |
32874aea |
1167 | noise_ultralight(nsent); |
2f75bae1 |
1168 | if (nsent <= 0) { |
7440fd44 |
1169 | err = (nsent < 0 ? p_WSAGetLastError() : 0); |
e5eb3a1c |
1170 | if ((err < WSABASEERR && nsent < 0) || err == WSAEWOULDBLOCK) { |
d40a94b9 |
1171 | /* |
1172 | * Perfectly normal: we've sent all we can for the moment. |
1173 | * |
e5eb3a1c |
1174 | * (Some WinSock send() implementations can return |
1175 | * <0 but leave no sensible error indication - |
1176 | * WSAGetLastError() is called but returns zero or |
1177 | * a small number - so we check that case and treat |
1178 | * it just like WSAEWOULDBLOCK.) |
d40a94b9 |
1179 | */ |
2f75bae1 |
1180 | s->writable = FALSE; |
32874aea |
1181 | return; |
2f75bae1 |
1182 | } else if (nsent == 0 || |
32874aea |
1183 | err == WSAECONNABORTED || err == WSAECONNRESET) { |
1184 | /* |
7732d38a |
1185 | * If send() returns CONNABORTED or CONNRESET, we |
1186 | * unfortunately can't just call plug_closing(), |
1187 | * because it's quite likely that we're currently |
1188 | * _in_ a call from the code we'd be calling back |
1189 | * to, so we'd have to make half the SSH code |
1190 | * reentrant. Instead we flag a pending error on |
1191 | * the socket, to be dealt with (by calling |
1192 | * plug_closing()) at some suitable future moment. |
32874aea |
1193 | */ |
7732d38a |
1194 | s->pending_error = err; |
1195 | return; |
2f75bae1 |
1196 | } else { |
a8327734 |
1197 | /* We're inside the Windows frontend here, so we know |
1198 | * that the frontend handle is unnecessary. */ |
1199 | logevent(NULL, winsock_error_string(err)); |
247308b5 |
1200 | fatalbox("%s", winsock_error_string(err)); |
2f75bae1 |
1201 | } |
1202 | } else { |
5471d09a |
1203 | if (s->sending_oob) { |
1204 | if (nsent < len) { |
1205 | memmove(s->oobdata, s->oobdata+nsent, len-nsent); |
1206 | s->sending_oob = len - nsent; |
1207 | } else { |
1208 | s->sending_oob = 0; |
1209 | } |
1210 | } else { |
1211 | bufchain_consume(&s->output_data, nsent); |
2f75bae1 |
1212 | } |
1213 | } |
1214 | } |
1215 | } |
1216 | |
e0e7dff8 |
1217 | static int sk_tcp_write(Socket sock, const char *buf, int len) |
32874aea |
1218 | { |
7e78000d |
1219 | Actual_Socket s = (Actual_Socket) sock; |
1220 | |
2f75bae1 |
1221 | /* |
1222 | * Add the data to the buffer list on the socket. |
1223 | */ |
5471d09a |
1224 | bufchain_add(&s->output_data, buf, len); |
2f75bae1 |
1225 | |
1226 | /* |
1227 | * Now try sending from the start of the buffer list. |
1228 | */ |
1229 | if (s->writable) |
1230 | try_send(s); |
5471d09a |
1231 | |
1232 | return bufchain_size(&s->output_data); |
2f75bae1 |
1233 | } |
1234 | |
e0e7dff8 |
1235 | static int sk_tcp_write_oob(Socket sock, const char *buf, int len) |
32874aea |
1236 | { |
7e78000d |
1237 | Actual_Socket s = (Actual_Socket) sock; |
1238 | |
2f75bae1 |
1239 | /* |
1240 | * Replace the buffer list on the socket with the data. |
1241 | */ |
5471d09a |
1242 | bufchain_clear(&s->output_data); |
1243 | assert(len <= sizeof(s->oobdata)); |
1244 | memcpy(s->oobdata, buf, len); |
2f75bae1 |
1245 | s->sending_oob = len; |
1246 | |
1247 | /* |
1248 | * Now try sending from the start of the buffer list. |
1249 | */ |
1250 | if (s->writable) |
1251 | try_send(s); |
5471d09a |
1252 | |
1253 | return s->sending_oob; |
2f75bae1 |
1254 | } |
1255 | |
32874aea |
1256 | int select_result(WPARAM wParam, LPARAM lParam) |
1257 | { |
f9d3f227 |
1258 | int ret, open; |
2f75bae1 |
1259 | DWORD err; |
b675c612 |
1260 | char buf[20480]; /* nice big buffer for plenty of speed */ |
7e78000d |
1261 | Actual_Socket s; |
49bad831 |
1262 | u_long atmark; |
2f75bae1 |
1263 | |
1264 | /* wParam is the socket itself */ |
cc8b0ee9 |
1265 | |
ce6fcfa5 |
1266 | if (wParam == 0) |
1267 | return 1; /* boggle */ |
cc8b0ee9 |
1268 | |
32874aea |
1269 | s = find234(sktree, (void *) wParam, cmpforsearch); |
2f75bae1 |
1270 | if (!s) |
1271 | return 1; /* boggle */ |
1272 | |
1273 | if ((err = WSAGETSELECTERROR(lParam)) != 0) { |
32874aea |
1274 | /* |
1275 | * An error has occurred on this socket. Pass it to the |
1276 | * plug. |
1277 | */ |
7555d6a5 |
1278 | if (s->addr) { |
1279 | plug_log(s->plug, 1, s->addr, s->port, |
1280 | winsock_error_string(err), err); |
1281 | while (s->addr && sk_nextaddr(s->addr)) { |
1282 | err = try_connect(s); |
1283 | } |
1284 | } |
1285 | if (err != 0) |
1286 | return plug_closing(s->plug, winsock_error_string(err), err, 0); |
1287 | else |
1288 | return 1; |
2f75bae1 |
1289 | } |
1290 | |
7d6ee6ff |
1291 | noise_ultralight(lParam); |
1292 | |
2f75bae1 |
1293 | switch (WSAGETSELECTEVENT(lParam)) { |
3ad9d396 |
1294 | case FD_CONNECT: |
1295 | s->connected = s->writable = 1; |
7555d6a5 |
1296 | /* |
1297 | * Once a socket is connected, we can stop falling |
1298 | * back through the candidate addresses to connect |
1299 | * to. |
1300 | */ |
1301 | if (s->addr) { |
1302 | sk_addr_free(s->addr); |
1303 | s->addr = NULL; |
1304 | } |
3ad9d396 |
1305 | break; |
2f75bae1 |
1306 | case FD_READ: |
d74d141c |
1307 | /* In the case the socket is still frozen, we don't even bother */ |
5471d09a |
1308 | if (s->frozen) { |
1309 | s->frozen_readable = 1; |
d74d141c |
1310 | break; |
5471d09a |
1311 | } |
d74d141c |
1312 | |
32874aea |
1313 | /* |
1314 | * We have received data on the socket. For an oobinline |
1315 | * socket, this might be data _before_ an urgent pointer, |
1316 | * in which case we send it to the back end with type==1 |
1317 | * (data prior to urgent). |
1318 | */ |
1319 | if (s->oobinline) { |
1320 | atmark = 1; |
7440fd44 |
1321 | p_ioctlsocket(s->s, SIOCATMARK, &atmark); |
32874aea |
1322 | /* |
1323 | * Avoid checking the return value from ioctlsocket(), |
1324 | * on the grounds that some WinSock wrappers don't |
1325 | * support it. If it does nothing, we get atmark==1, |
1326 | * which is equivalent to `no OOB pending', so the |
1327 | * effect will be to non-OOB-ify any OOB data. |
1328 | */ |
1329 | } else |
1330 | atmark = 1; |
4b1e8acc |
1331 | |
7440fd44 |
1332 | ret = p_recv(s->s, buf, sizeof(buf), 0); |
32874aea |
1333 | noise_ultralight(ret); |
2f75bae1 |
1334 | if (ret < 0) { |
7440fd44 |
1335 | err = p_WSAGetLastError(); |
2f75bae1 |
1336 | if (err == WSAEWOULDBLOCK) { |
1337 | break; |
1338 | } |
1339 | } |
1340 | if (ret < 0) { |
32874aea |
1341 | return plug_closing(s->plug, winsock_error_string(err), err, |
1342 | 0); |
7e78000d |
1343 | } else if (0 == ret) { |
32874aea |
1344 | return plug_closing(s->plug, NULL, 0, 0); |
2f75bae1 |
1345 | } else { |
32874aea |
1346 | return plug_receive(s->plug, atmark ? 0 : 1, buf, ret); |
2f75bae1 |
1347 | } |
1348 | break; |
1349 | case FD_OOB: |
32874aea |
1350 | /* |
1351 | * This will only happen on a non-oobinline socket. It |
1352 | * indicates that we can immediately perform an OOB read |
1353 | * and get back OOB data, which we will send to the back |
1354 | * end with type==2 (urgent data). |
1355 | */ |
7440fd44 |
1356 | ret = p_recv(s->s, buf, sizeof(buf), MSG_OOB); |
32874aea |
1357 | noise_ultralight(ret); |
1358 | if (ret <= 0) { |
247308b5 |
1359 | char *str = (ret == 0 ? "Internal networking trouble" : |
7440fd44 |
1360 | winsock_error_string(p_WSAGetLastError())); |
a8327734 |
1361 | /* We're inside the Windows frontend here, so we know |
1362 | * that the frontend handle is unnecessary. */ |
1363 | logevent(NULL, str); |
247308b5 |
1364 | fatalbox("%s", str); |
32874aea |
1365 | } else { |
1366 | return plug_receive(s->plug, 2, buf, ret); |
1367 | } |
1368 | break; |
2f75bae1 |
1369 | case FD_WRITE: |
5471d09a |
1370 | { |
1371 | int bufsize_before, bufsize_after; |
1372 | s->writable = 1; |
1373 | bufsize_before = s->sending_oob + bufchain_size(&s->output_data); |
1374 | try_send(s); |
1375 | bufsize_after = s->sending_oob + bufchain_size(&s->output_data); |
1376 | if (bufsize_after < bufsize_before) |
1377 | plug_sent(s->plug, bufsize_after); |
1378 | } |
2f75bae1 |
1379 | break; |
1380 | case FD_CLOSE: |
f9d3f227 |
1381 | /* Signal a close on the socket. First read any outstanding data. */ |
32874aea |
1382 | open = 1; |
1383 | do { |
7440fd44 |
1384 | ret = p_recv(s->s, buf, sizeof(buf), 0); |
32874aea |
1385 | if (ret < 0) { |
7440fd44 |
1386 | err = p_WSAGetLastError(); |
32874aea |
1387 | if (err == WSAEWOULDBLOCK) |
1388 | break; |
1389 | return plug_closing(s->plug, winsock_error_string(err), |
1390 | err, 0); |
1391 | } else { |
1392 | if (ret) |
1393 | open &= plug_receive(s->plug, 0, buf, ret); |
1394 | else |
1395 | open &= plug_closing(s->plug, NULL, 0, 0); |
7e78000d |
1396 | } |
f9d3f227 |
1397 | } while (ret > 0); |
32874aea |
1398 | return open; |
d74d141c |
1399 | case FD_ACCEPT: |
1400 | { |
05581745 |
1401 | #ifdef NO_IPV6 |
bc4802a1 |
1402 | struct sockaddr_in isa; |
05581745 |
1403 | #else |
1404 | struct sockaddr_storage isa; |
1405 | #endif |
1406 | int addrlen = sizeof(isa); |
bcce45ed |
1407 | SOCKET t; /* socket of connection */ |
1408 | |
05581745 |
1409 | memset(&isa, 0, sizeof(isa)); |
bcce45ed |
1410 | err = 0; |
7440fd44 |
1411 | t = p_accept(s->s,(struct sockaddr *)&isa,&addrlen); |
bcce45ed |
1412 | if (t == INVALID_SOCKET) |
1413 | { |
7440fd44 |
1414 | err = p_WSAGetLastError(); |
bcce45ed |
1415 | if (err == WSATRY_AGAIN) |
1416 | break; |
1417 | } |
05581745 |
1418 | #ifndef NO_IPV6 |
1419 | if (isa.ss_family == AF_INET && |
1420 | s->localhost_only && |
1421 | !ipv4_is_local_addr(((struct sockaddr_in *)&isa)->sin_addr)) { |
1422 | #else |
a143ea0a |
1423 | if (s->localhost_only && !ipv4_is_local_addr(isa.sin_addr)) { |
05581745 |
1424 | #endif |
7440fd44 |
1425 | p_closesocket(t); /* dodgy WinSock let nonlocal through */ |
bc4802a1 |
1426 | } else if (plug_accepting(s->plug, (void*)t)) { |
7440fd44 |
1427 | p_closesocket(t); /* denied or error */ |
bcce45ed |
1428 | } |
d74d141c |
1429 | } |
2f75bae1 |
1430 | } |
1431 | |
1432 | return 1; |
1433 | } |
1434 | |
1435 | /* |
7732d38a |
1436 | * Deal with socket errors detected in try_send(). |
1437 | */ |
1438 | void net_pending_errors(void) |
1439 | { |
1440 | int i; |
1441 | Actual_Socket s; |
1442 | |
1443 | /* |
1444 | * This might be a fiddly business, because it's just possible |
1445 | * that handling a pending error on one socket might cause |
1446 | * others to be closed. (I can't think of any reason this might |
1447 | * happen in current SSH implementation, but to maintain |
1448 | * generality of this network layer I'll assume the worst.) |
1449 | * |
1450 | * So what we'll do is search the socket list for _one_ socket |
1451 | * with a pending error, and then handle it, and then search |
1452 | * the list again _from the beginning_. Repeat until we make a |
1453 | * pass with no socket errors present. That way we are |
1454 | * protected against the socket list changing under our feet. |
1455 | */ |
1456 | |
1457 | do { |
1458 | for (i = 0; (s = index234(sktree, i)) != NULL; i++) { |
1459 | if (s->pending_error) { |
1460 | /* |
1461 | * An error has occurred on this socket. Pass it to the |
1462 | * plug. |
1463 | */ |
1464 | plug_closing(s->plug, |
1465 | winsock_error_string(s->pending_error), |
1466 | s->pending_error, 0); |
1467 | break; |
1468 | } |
1469 | } |
1470 | } while (s); |
1471 | } |
1472 | |
1473 | /* |
2f75bae1 |
1474 | * Each socket abstraction contains a `void *' private field in |
1475 | * which the client can keep state. |
1476 | */ |
8eebd221 |
1477 | static void sk_tcp_set_private_ptr(Socket sock, void *ptr) |
32874aea |
1478 | { |
7e78000d |
1479 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1480 | s->private_ptr = ptr; |
1481 | } |
32874aea |
1482 | |
8eebd221 |
1483 | static void *sk_tcp_get_private_ptr(Socket sock) |
32874aea |
1484 | { |
7e78000d |
1485 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1486 | return s->private_ptr; |
1487 | } |
1488 | |
1489 | /* |
1490 | * Special error values are returned from sk_namelookup and sk_new |
1491 | * if there's a problem. These functions extract an error message, |
1492 | * or return NULL if there's no problem. |
1493 | */ |
cbe2d68f |
1494 | const char *sk_addr_error(SockAddr addr) |
32874aea |
1495 | { |
2f75bae1 |
1496 | return addr->error; |
1497 | } |
cbe2d68f |
1498 | static const char *sk_tcp_socket_error(Socket sock) |
32874aea |
1499 | { |
7e78000d |
1500 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1501 | return s->error; |
1502 | } |
1503 | |
8eebd221 |
1504 | static void sk_tcp_set_frozen(Socket sock, int is_frozen) |
d74d141c |
1505 | { |
1506 | Actual_Socket s = (Actual_Socket) sock; |
5471d09a |
1507 | if (s->frozen == is_frozen) |
1508 | return; |
d74d141c |
1509 | s->frozen = is_frozen; |
5471d09a |
1510 | if (!is_frozen && s->frozen_readable) { |
d74d141c |
1511 | char c; |
7440fd44 |
1512 | p_recv(s->s, &c, 1, MSG_PEEK); |
d74d141c |
1513 | } |
5471d09a |
1514 | s->frozen_readable = 0; |
d74d141c |
1515 | } |
1516 | |
2f75bae1 |
1517 | /* |
1518 | * For Plink: enumerate all sockets currently active. |
1519 | */ |
32874aea |
1520 | SOCKET first_socket(int *state) |
1521 | { |
d2371c81 |
1522 | Actual_Socket s; |
1523 | *state = 0; |
1524 | s = index234(sktree, (*state)++); |
2f75bae1 |
1525 | return s ? s->s : INVALID_SOCKET; |
1526 | } |
32874aea |
1527 | |
1528 | SOCKET next_socket(int *state) |
1529 | { |
d2371c81 |
1530 | Actual_Socket s = index234(sktree, (*state)++); |
2f75bae1 |
1531 | return s ? s->s : INVALID_SOCKET; |
1532 | } |
68a49acb |
1533 | |
39934deb |
1534 | extern int socket_writable(SOCKET skt) |
1535 | { |
1536 | Actual_Socket s = find234(sktree, (void *)skt, cmpforsearch); |
1537 | |
1538 | if (s) |
1539 | return bufchain_size(&s->output_data) > 0; |
1540 | else |
1541 | return 0; |
1542 | } |
1543 | |
68a49acb |
1544 | int net_service_lookup(char *service) |
1545 | { |
1546 | struct servent *se; |
7440fd44 |
1547 | se = p_getservbyname(service, NULL); |
68a49acb |
1548 | if (se != NULL) |
7440fd44 |
1549 | return p_ntohs(se->s_port); |
68a49acb |
1550 | else |
1551 | return 0; |
1552 | } |
fc0f17db |
1553 | |
1554 | SockAddr platform_get_x11_unix_address(int displaynum, char **canonicalname) |
1555 | { |
1556 | SockAddr ret = snew(struct SockAddr_tag); |
1557 | memset(ret, 0, sizeof(struct SockAddr_tag)); |
1558 | ret->error = "unix sockets not supported on this platform"; |
1559 | return ret; |
1560 | } |