2f75bae1 |
1 | /* |
2 | * Windows networking abstraction. |
c4d8e107 |
3 | * |
4 | * Due to this clean abstraction it was possible |
5 | * to easily implement IPv6 support :) |
6 | * |
7 | * IPv6 patch 1 (27 October 2000) Jeroen Massar <jeroen@unfix.org> |
8 | * - Preliminary hacked IPv6 support. |
9 | * - Connecting to IPv6 address (eg fec0:4242:4242:100:2d0:b7ff:fe8f:5d42) works. |
10 | * - Connecting to IPv6 hostname (eg heaven.ipv6.unfix.org) works. |
11 | * - Compiles as either IPv4 or IPv6. |
12 | * |
13 | * IPv6 patch 2 (29 October 2000) Jeroen Massar <jeroen@unfix.org> |
14 | * - When compiled as IPv6 it also allows connecting to IPv4 hosts. |
15 | * - Added some more documentation. |
16 | * |
17 | * IPv6 patch 3 (18 November 2000) Jeroen Massar <jeroen@unfix.org> |
18 | * - It now supports dynamically loading the IPv6 resolver dll's. |
19 | * This way we should be able to distribute one (1) binary |
20 | * which supports both IPv4 and IPv6. |
21 | * - getaddrinfo() and getnameinfo() are loaded dynamicaly if possible. |
22 | * - in6addr_any is defined in this file so we don't need to link to wship6.lib |
23 | * - The patch is now more unified so that we can still |
24 | * remove all IPv6 support by undef'ing IPV6. |
25 | * But where it fallsback to IPv4 it uses the IPv4 code which is already in place... |
26 | * - Canonical name resolving works. |
27 | * |
28 | * IPv6 patch 4 (07 January 2001) Jeroen Massar <jeroen@unfix.org> |
29 | * - patch against CVS of today, will be submitted to the bugs list |
30 | * as a 'cvs diff -u' on Simon's request... |
31 | * |
2f75bae1 |
32 | */ |
33 | |
c4d8e107 |
34 | /* |
35 | * Define IPV6 to have IPv6 on-the-fly-loading support. |
36 | * This means that one doesn't have to have an IPv6 stack to use it. |
37 | * But if an IPv6 stack is found it is used with a fallback to IPv4. |
38 | */ |
39 | /* #define IPV6 1 */ |
40 | |
2f75bae1 |
41 | #include <stdio.h> |
49bad831 |
42 | #include <stdlib.h> |
5471d09a |
43 | #include <assert.h> |
2f75bae1 |
44 | |
7e78000d |
45 | #define DEFINE_PLUG_METHOD_MACROS |
2f75bae1 |
46 | #include "putty.h" |
47 | #include "network.h" |
48 | #include "tree234.h" |
49 | |
7440fd44 |
50 | #include <ws2tcpip.h> |
a143ea0a |
51 | #ifdef IPV6 |
7440fd44 |
52 | #include <tpipv6.h> |
53 | #endif |
54 | |
6ee9b735 |
55 | #define ipv4_is_loopback(addr) \ |
7440fd44 |
56 | ((p_ntohl(addr.s_addr) & 0xFF000000L) == 0x7F000000L) |
6ee9b735 |
57 | |
2f75bae1 |
58 | struct Socket_tag { |
c85623f9 |
59 | const struct socket_function_table *fn; |
7e78000d |
60 | /* the above variable absolutely *must* be the first in this structure */ |
2f75bae1 |
61 | char *error; |
62 | SOCKET s; |
7e78000d |
63 | Plug plug; |
2f75bae1 |
64 | void *private_ptr; |
5471d09a |
65 | bufchain output_data; |
3ad9d396 |
66 | int connected; |
2f75bae1 |
67 | int writable; |
5471d09a |
68 | int frozen; /* this causes readability notifications to be ignored */ |
69 | int frozen_readable; /* this means we missed at least one readability |
70 | * notification while we were frozen */ |
bc4802a1 |
71 | int localhost_only; /* for listening sockets */ |
5471d09a |
72 | char oobdata[1]; |
1ad4eb6f |
73 | int sending_oob; |
4b1e8acc |
74 | int oobinline; |
7732d38a |
75 | int pending_error; /* in case send() returns error */ |
2f75bae1 |
76 | }; |
77 | |
7e78000d |
78 | /* |
79 | * We used to typedef struct Socket_tag *Socket. |
80 | * |
81 | * Since we have made the networking abstraction slightly more |
82 | * abstract, Socket no longer means a tcp socket (it could mean |
83 | * an ssl socket). So now we must use Actual_Socket when we know |
84 | * we are talking about a tcp socket. |
85 | */ |
86 | typedef struct Socket_tag *Actual_Socket; |
87 | |
2f75bae1 |
88 | struct SockAddr_tag { |
89 | char *error; |
b7a189f3 |
90 | /* |
91 | * Which address family this address belongs to. AF_INET for |
92 | * IPv4; AF_INET6 for IPv6; AF_UNSPEC indicates that name |
93 | * resolution has not been done and a simple host name is held |
94 | * in this SockAddr structure. |
95 | */ |
32874aea |
96 | int family; |
c4d8e107 |
97 | unsigned long address; /* Address IPv4 style. */ |
98 | #ifdef IPV6 |
99 | struct addrinfo *ai; /* Address IPv6 style. */ |
100 | #endif |
b7a189f3 |
101 | char hostname[512]; /* Store an unresolved host name. */ |
2f75bae1 |
102 | }; |
103 | |
2f75bae1 |
104 | static tree234 *sktree; |
105 | |
32874aea |
106 | static int cmpfortree(void *av, void *bv) |
107 | { |
108 | Actual_Socket a = (Actual_Socket) av, b = (Actual_Socket) bv; |
109 | unsigned long as = (unsigned long) a->s, bs = (unsigned long) b->s; |
110 | if (as < bs) |
111 | return -1; |
112 | if (as > bs) |
113 | return +1; |
2f75bae1 |
114 | return 0; |
115 | } |
116 | |
32874aea |
117 | static int cmpforsearch(void *av, void *bv) |
118 | { |
119 | Actual_Socket b = (Actual_Socket) bv; |
120 | unsigned long as = (unsigned long) av, bs = (unsigned long) b->s; |
121 | if (as < bs) |
122 | return -1; |
123 | if (as > bs) |
124 | return +1; |
2f75bae1 |
125 | return 0; |
126 | } |
127 | |
7440fd44 |
128 | #define NOTHING |
129 | #define DECL_WINSOCK_FUNCTION(linkage, rettype, name, params) \ |
130 | typedef rettype (WINAPI *t_##name) params; \ |
131 | linkage t_##name p_##name |
132 | #define GET_WINSOCK_FUNCTION(name) \ |
133 | p_##name = (t_##name) GetProcAddress(winsock_module, #name) |
134 | |
135 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAAsyncSelect, |
136 | (SOCKET, HWND, u_int, long)); |
137 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAEventSelect, (SOCKET, WSAEVENT, long)); |
138 | DECL_WINSOCK_FUNCTION(NOTHING, int, select, |
139 | (int, fd_set FAR *, fd_set FAR *, |
140 | fd_set FAR *, const struct timeval FAR *)); |
141 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAGetLastError, (void)); |
142 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAEnumNetworkEvents, |
143 | (SOCKET, WSAEVENT, LPWSANETWORKEVENTS)); |
144 | DECL_WINSOCK_FUNCTION(static, int, WSAStartup, (WORD, LPWSADATA)); |
145 | DECL_WINSOCK_FUNCTION(static, int, WSACleanup, (void)); |
146 | DECL_WINSOCK_FUNCTION(static, int, closesocket, (SOCKET)); |
147 | DECL_WINSOCK_FUNCTION(static, u_long, ntohl, (u_long)); |
148 | DECL_WINSOCK_FUNCTION(static, u_long, htonl, (u_long)); |
149 | DECL_WINSOCK_FUNCTION(static, u_short, htons, (u_short)); |
150 | DECL_WINSOCK_FUNCTION(static, u_short, ntohs, (u_short)); |
151 | DECL_WINSOCK_FUNCTION(static, struct hostent FAR *, gethostbyname, |
152 | (const char FAR *)); |
153 | DECL_WINSOCK_FUNCTION(static, struct servent FAR *, getservbyname, |
154 | (const char FAR *, const char FAR *)); |
155 | DECL_WINSOCK_FUNCTION(static, unsigned long, inet_addr, (const char FAR *)); |
156 | DECL_WINSOCK_FUNCTION(static, char FAR *, inet_ntoa, (struct in_addr)); |
157 | DECL_WINSOCK_FUNCTION(static, int, connect, |
158 | (SOCKET, const struct sockaddr FAR *, int)); |
159 | DECL_WINSOCK_FUNCTION(static, int, bind, |
160 | (SOCKET, const struct sockaddr FAR *, int)); |
161 | DECL_WINSOCK_FUNCTION(static, int, setsockopt, |
162 | (SOCKET, int, int, const char FAR *, int)); |
163 | DECL_WINSOCK_FUNCTION(static, SOCKET, socket, (int, int, int)); |
164 | DECL_WINSOCK_FUNCTION(static, int, listen, (SOCKET, int)); |
165 | DECL_WINSOCK_FUNCTION(static, int, send, (SOCKET, const char FAR *, int, int)); |
166 | DECL_WINSOCK_FUNCTION(static, int, ioctlsocket, |
167 | (SOCKET, long, u_long FAR *)); |
168 | DECL_WINSOCK_FUNCTION(static, SOCKET, accept, |
169 | (SOCKET, struct sockaddr FAR *, int FAR *)); |
170 | DECL_WINSOCK_FUNCTION(static, int, recv, (SOCKET, char FAR *, int, int)); |
a143ea0a |
171 | DECL_WINSOCK_FUNCTION(static, int, WSAIoctl, |
172 | (SOCKET, DWORD, LPVOID, DWORD, LPVOID, DWORD, |
173 | LPDWORD, LPWSAOVERLAPPED, |
174 | LPWSAOVERLAPPED_COMPLETION_ROUTINE)); |
7440fd44 |
175 | |
176 | static HMODULE winsock_module; |
177 | |
32874aea |
178 | void sk_init(void) |
179 | { |
7440fd44 |
180 | WORD winsock_ver; |
181 | WSADATA wsadata; |
182 | |
183 | winsock_ver = MAKEWORD(2, 0); |
184 | winsock_module = LoadLibrary("WS2_32.DLL"); |
185 | if (!winsock_module) { |
186 | winsock_module = LoadLibrary("WSOCK32.DLL"); |
187 | winsock_ver = MAKEWORD(1, 1); |
188 | } |
189 | if (!winsock_module) |
190 | fatalbox("Unable to load any WinSock library"); |
191 | |
192 | GET_WINSOCK_FUNCTION(WSAAsyncSelect); |
193 | GET_WINSOCK_FUNCTION(WSAEventSelect); |
194 | GET_WINSOCK_FUNCTION(select); |
195 | GET_WINSOCK_FUNCTION(WSAGetLastError); |
196 | GET_WINSOCK_FUNCTION(WSAEnumNetworkEvents); |
197 | GET_WINSOCK_FUNCTION(WSAStartup); |
198 | GET_WINSOCK_FUNCTION(WSACleanup); |
199 | GET_WINSOCK_FUNCTION(closesocket); |
200 | GET_WINSOCK_FUNCTION(ntohl); |
201 | GET_WINSOCK_FUNCTION(htonl); |
202 | GET_WINSOCK_FUNCTION(htons); |
203 | GET_WINSOCK_FUNCTION(ntohs); |
204 | GET_WINSOCK_FUNCTION(gethostbyname); |
205 | GET_WINSOCK_FUNCTION(getservbyname); |
206 | GET_WINSOCK_FUNCTION(inet_addr); |
207 | GET_WINSOCK_FUNCTION(inet_ntoa); |
208 | GET_WINSOCK_FUNCTION(connect); |
209 | GET_WINSOCK_FUNCTION(bind); |
210 | GET_WINSOCK_FUNCTION(setsockopt); |
211 | GET_WINSOCK_FUNCTION(socket); |
212 | GET_WINSOCK_FUNCTION(listen); |
213 | GET_WINSOCK_FUNCTION(send); |
214 | GET_WINSOCK_FUNCTION(ioctlsocket); |
215 | GET_WINSOCK_FUNCTION(accept); |
216 | GET_WINSOCK_FUNCTION(recv); |
a143ea0a |
217 | GET_WINSOCK_FUNCTION(WSAIoctl); |
7440fd44 |
218 | |
219 | if (p_WSAStartup(winsock_ver, &wsadata)) { |
220 | fatalbox("Unable to initialise WinSock"); |
221 | } |
222 | if (LOBYTE(wsadata.wVersion) != LOBYTE(winsock_ver)) { |
223 | p_WSACleanup(); |
224 | fatalbox("WinSock version is incompatible with %d.%d", |
225 | LOBYTE(winsock_ver), HIBYTE(winsock_ver)); |
226 | } |
227 | |
2f75bae1 |
228 | sktree = newtree234(cmpfortree); |
229 | } |
230 | |
93b581bd |
231 | void sk_cleanup(void) |
232 | { |
233 | Actual_Socket s; |
234 | int i; |
235 | |
236 | if (sktree) { |
237 | for (i = 0; (s = index234(sktree, i)) != NULL; i++) { |
7440fd44 |
238 | p_closesocket(s->s); |
93b581bd |
239 | } |
679539d7 |
240 | freetree234(sktree); |
241 | sktree = NULL; |
93b581bd |
242 | } |
7440fd44 |
243 | |
244 | p_WSACleanup(); |
245 | if (winsock_module) |
246 | FreeLibrary(winsock_module); |
93b581bd |
247 | } |
248 | |
32874aea |
249 | char *winsock_error_string(int error) |
250 | { |
e74fbad9 |
251 | switch (error) { |
32874aea |
252 | case WSAEACCES: |
253 | return "Network error: Permission denied"; |
254 | case WSAEADDRINUSE: |
255 | return "Network error: Address already in use"; |
256 | case WSAEADDRNOTAVAIL: |
257 | return "Network error: Cannot assign requested address"; |
258 | case WSAEAFNOSUPPORT: |
259 | return |
260 | "Network error: Address family not supported by protocol family"; |
261 | case WSAEALREADY: |
262 | return "Network error: Operation already in progress"; |
263 | case WSAECONNABORTED: |
264 | return "Network error: Software caused connection abort"; |
265 | case WSAECONNREFUSED: |
266 | return "Network error: Connection refused"; |
267 | case WSAECONNRESET: |
268 | return "Network error: Connection reset by peer"; |
269 | case WSAEDESTADDRREQ: |
270 | return "Network error: Destination address required"; |
271 | case WSAEFAULT: |
272 | return "Network error: Bad address"; |
273 | case WSAEHOSTDOWN: |
274 | return "Network error: Host is down"; |
275 | case WSAEHOSTUNREACH: |
276 | return "Network error: No route to host"; |
277 | case WSAEINPROGRESS: |
278 | return "Network error: Operation now in progress"; |
279 | case WSAEINTR: |
280 | return "Network error: Interrupted function call"; |
281 | case WSAEINVAL: |
282 | return "Network error: Invalid argument"; |
283 | case WSAEISCONN: |
284 | return "Network error: Socket is already connected"; |
285 | case WSAEMFILE: |
286 | return "Network error: Too many open files"; |
287 | case WSAEMSGSIZE: |
288 | return "Network error: Message too long"; |
289 | case WSAENETDOWN: |
290 | return "Network error: Network is down"; |
291 | case WSAENETRESET: |
292 | return "Network error: Network dropped connection on reset"; |
293 | case WSAENETUNREACH: |
294 | return "Network error: Network is unreachable"; |
295 | case WSAENOBUFS: |
296 | return "Network error: No buffer space available"; |
297 | case WSAENOPROTOOPT: |
298 | return "Network error: Bad protocol option"; |
299 | case WSAENOTCONN: |
300 | return "Network error: Socket is not connected"; |
301 | case WSAENOTSOCK: |
302 | return "Network error: Socket operation on non-socket"; |
303 | case WSAEOPNOTSUPP: |
304 | return "Network error: Operation not supported"; |
305 | case WSAEPFNOSUPPORT: |
306 | return "Network error: Protocol family not supported"; |
307 | case WSAEPROCLIM: |
308 | return "Network error: Too many processes"; |
309 | case WSAEPROTONOSUPPORT: |
310 | return "Network error: Protocol not supported"; |
311 | case WSAEPROTOTYPE: |
312 | return "Network error: Protocol wrong type for socket"; |
313 | case WSAESHUTDOWN: |
314 | return "Network error: Cannot send after socket shutdown"; |
315 | case WSAESOCKTNOSUPPORT: |
316 | return "Network error: Socket type not supported"; |
317 | case WSAETIMEDOUT: |
318 | return "Network error: Connection timed out"; |
319 | case WSAEWOULDBLOCK: |
320 | return "Network error: Resource temporarily unavailable"; |
321 | case WSAEDISCON: |
322 | return "Network error: Graceful shutdown in progress"; |
323 | default: |
324 | return "Unknown network error"; |
e74fbad9 |
325 | } |
326 | } |
327 | |
e8fa8f62 |
328 | SockAddr sk_namelookup(const char *host, char **canonicalname) |
c4d8e107 |
329 | { |
3d88e64d |
330 | SockAddr ret = snew(struct SockAddr_tag); |
2f75bae1 |
331 | unsigned long a; |
c4d8e107 |
332 | struct hostent *h = NULL; |
6e1ebb76 |
333 | char realhost[8192]; |
2f75bae1 |
334 | |
c4d8e107 |
335 | /* Clear the structure and default to IPv4. */ |
336 | memset(ret, 0, sizeof(struct SockAddr_tag)); |
337 | ret->family = 0; /* We set this one when we have resolved the host. */ |
6e1ebb76 |
338 | *realhost = '\0'; |
c4d8e107 |
339 | |
7440fd44 |
340 | if ((a = p_inet_addr(host)) == (unsigned long) INADDR_NONE) { |
c4d8e107 |
341 | #ifdef IPV6 |
342 | |
343 | /* Try to get the getaddrinfo() function from wship6.dll */ |
344 | /* This way one doesn't need to have IPv6 dll's to use PuTTY and |
345 | * it will fallback to IPv4. */ |
32874aea |
346 | typedef int (CALLBACK * FGETADDRINFO) (const char *nodename, |
347 | const char *servname, |
348 | const struct addrinfo * |
349 | hints, |
350 | struct addrinfo ** res); |
c4d8e107 |
351 | FGETADDRINFO fGetAddrInfo = NULL; |
352 | |
353 | HINSTANCE dllWSHIP6 = LoadLibrary("wship6.dll"); |
354 | if (dllWSHIP6) |
32874aea |
355 | fGetAddrInfo = (FGETADDRINFO) GetProcAddress(dllWSHIP6, |
356 | "getaddrinfo"); |
c4d8e107 |
357 | |
358 | /* |
359 | * Use fGetAddrInfo when it's available (which usually also |
360 | * means IPv6 is installed...) |
361 | */ |
32874aea |
362 | if (fGetAddrInfo) { |
c4d8e107 |
363 | /*debug(("Resolving \"%s\" with getaddrinfo() (IPv4+IPv6 capable)...\n", host)); */ |
364 | if (fGetAddrInfo(host, NULL, NULL, &ret->ai) == 0) |
365 | ret->family = ret->ai->ai_family; |
32874aea |
366 | } else |
c4d8e107 |
367 | #endif |
32874aea |
368 | { |
c4d8e107 |
369 | /* |
370 | * Otherwise use the IPv4-only gethostbyname... |
371 | * (NOTE: we don't use gethostbyname as a |
372 | * fallback!) |
373 | */ |
32874aea |
374 | if (ret->family == 0) { |
375 | /*debug(("Resolving \"%s\" with gethostbyname() (IPv4 only)...\n", host)); */ |
7440fd44 |
376 | if ( (h = p_gethostbyname(host)) ) |
32874aea |
377 | ret->family = AF_INET; |
378 | } |
c4d8e107 |
379 | } |
380 | /*debug(("Done resolving...(family is %d) AF_INET = %d, AF_INET6 = %d\n", ret->family, AF_INET, AF_INET6)); */ |
381 | |
32874aea |
382 | if (ret->family == 0) { |
7440fd44 |
383 | DWORD err = p_WSAGetLastError(); |
c4d8e107 |
384 | ret->error = (err == WSAENETDOWN ? "Network is down" : |
32874aea |
385 | err == |
386 | WSAHOST_NOT_FOUND ? "Host does not exist" : err |
387 | == WSATRY_AGAIN ? "Host not found" : |
c4d8e107 |
388 | #ifdef IPV6 |
389 | fGetAddrInfo ? "getaddrinfo: unknown error" : |
390 | #endif |
391 | "gethostbyname: unknown error"); |
392 | #ifdef DEBUG |
393 | { |
394 | LPVOID lpMsgBuf; |
32874aea |
395 | FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | |
396 | FORMAT_MESSAGE_FROM_SYSTEM | |
397 | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, err, |
398 | MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), |
399 | (LPTSTR) & lpMsgBuf, 0, NULL); |
400 | /*debug(("Error %ld: %s (h=%lx)\n", err, lpMsgBuf, h)); */ |
c4d8e107 |
401 | /* Free the buffer. */ |
402 | LocalFree(lpMsgBuf); |
403 | } |
404 | #endif |
32874aea |
405 | } else { |
c4d8e107 |
406 | ret->error = NULL; |
407 | |
408 | #ifdef IPV6 |
409 | /* If we got an address info use that... */ |
32874aea |
410 | if (ret->ai) { |
411 | typedef int (CALLBACK * FGETNAMEINFO) |
412 | (const struct sockaddr FAR * sa, socklen_t salen, |
413 | char FAR * host, size_t hostlen, char FAR * serv, |
414 | size_t servlen, int flags); |
c4d8e107 |
415 | FGETNAMEINFO fGetNameInfo = NULL; |
416 | |
417 | /* Are we in IPv4 fallback mode? */ |
418 | /* We put the IPv4 address into the a variable so we can further-on use the IPv4 code... */ |
419 | if (ret->family == AF_INET) |
32874aea |
420 | memcpy(&a, |
421 | (char *) &((SOCKADDR_IN *) ret->ai-> |
422 | ai_addr)->sin_addr, sizeof(a)); |
c4d8e107 |
423 | |
424 | /* Now let's find that canonicalname... */ |
32874aea |
425 | if ((dllWSHIP6) |
426 | && (fGetNameInfo = |
427 | (FGETNAMEINFO) GetProcAddress(dllWSHIP6, |
428 | "getnameinfo"))) { |
429 | if (fGetNameInfo |
430 | ((struct sockaddr *) ret->ai->ai_addr, |
431 | ret->family == |
432 | AF_INET ? sizeof(SOCKADDR_IN) : |
6e1ebb76 |
433 | sizeof(SOCKADDR_IN6), realhost, |
434 | sizeof(realhost), NULL, 0, 0) != 0) { |
435 | strncpy(realhost, host, sizeof(realhost)); |
c4d8e107 |
436 | } |
437 | } |
438 | } |
439 | /* We used the IPv4-only gethostbyname()... */ |
440 | else |
c4d8e107 |
441 | #endif |
32874aea |
442 | { |
c4d8e107 |
443 | memcpy(&a, h->h_addr, sizeof(a)); |
444 | /* This way we are always sure the h->h_name is valid :) */ |
6e1ebb76 |
445 | strncpy(realhost, h->h_name, sizeof(realhost)); |
c4d8e107 |
446 | } |
c4d8e107 |
447 | } |
448 | #ifdef IPV6 |
449 | FreeLibrary(dllWSHIP6); |
450 | #endif |
32874aea |
451 | } else { |
87ed061f |
452 | /* |
453 | * This must be a numeric IPv4 address because it caused a |
454 | * success return from inet_addr. |
455 | */ |
32874aea |
456 | ret->family = AF_INET; |
6e1ebb76 |
457 | strncpy(realhost, host, sizeof(realhost)); |
2f75bae1 |
458 | } |
7440fd44 |
459 | ret->address = p_ntohl(a); |
6e1ebb76 |
460 | realhost[lenof(realhost)-1] = '\0'; |
3d88e64d |
461 | *canonicalname = snewn(1+strlen(realhost), char); |
6e1ebb76 |
462 | strcpy(*canonicalname, realhost); |
2f75bae1 |
463 | return ret; |
464 | } |
465 | |
e8fa8f62 |
466 | SockAddr sk_nonamelookup(const char *host) |
b7a189f3 |
467 | { |
3d88e64d |
468 | SockAddr ret = snew(struct SockAddr_tag); |
ab0873ab |
469 | ret->error = NULL; |
b7a189f3 |
470 | ret->family = AF_UNSPEC; |
471 | strncpy(ret->hostname, host, lenof(ret->hostname)); |
472 | ret->hostname[lenof(ret->hostname)-1] = '\0'; |
473 | return ret; |
474 | } |
475 | |
3ad9d396 |
476 | void sk_getaddr(SockAddr addr, char *buf, int buflen) |
477 | { |
478 | #ifdef IPV6 |
b7a189f3 |
479 | if (addr->family == AF_INET6) { |
480 | FIXME; /* I don't know how to get a text form of an IPv6 address. */ |
481 | } else |
3ad9d396 |
482 | #endif |
b7a189f3 |
483 | if (addr->family == AF_INET) { |
3ad9d396 |
484 | struct in_addr a; |
7440fd44 |
485 | a.s_addr = p_htonl(addr->address); |
486 | strncpy(buf, p_inet_ntoa(a), buflen); |
b7a189f3 |
487 | buf[buflen-1] = '\0'; |
3ad9d396 |
488 | } else { |
b7a189f3 |
489 | assert(addr->family == AF_UNSPEC); |
490 | strncpy(buf, addr->hostname, buflen); |
491 | buf[buflen-1] = '\0'; |
3ad9d396 |
492 | } |
3ad9d396 |
493 | } |
494 | |
b804e1e5 |
495 | int sk_hostname_is_local(char *name) |
496 | { |
497 | return !strcmp(name, "localhost"); |
498 | } |
499 | |
a143ea0a |
500 | static INTERFACE_INFO local_interfaces[16]; |
501 | static int n_local_interfaces; /* 0=not yet, -1=failed, >0=number */ |
502 | |
503 | static int ipv4_is_local_addr(struct in_addr addr) |
504 | { |
505 | if (ipv4_is_loopback(addr)) |
506 | return 1; /* loopback addresses are local */ |
507 | if (!n_local_interfaces) { |
508 | SOCKET s = p_socket(AF_INET, SOCK_DGRAM, 0); |
509 | DWORD retbytes; |
510 | |
511 | if (p_WSAIoctl && |
512 | p_WSAIoctl(s, SIO_GET_INTERFACE_LIST, NULL, 0, |
513 | local_interfaces, sizeof(local_interfaces), |
514 | &retbytes, NULL, NULL) == 0) |
515 | n_local_interfaces = retbytes / sizeof(INTERFACE_INFO); |
516 | else |
517 | logevent(NULL, "Unable to get list of local IP addresses"); |
518 | } |
519 | if (n_local_interfaces > 0) { |
520 | int i; |
521 | for (i = 0; i < n_local_interfaces; i++) { |
522 | SOCKADDR_IN *address = |
523 | (SOCKADDR_IN *)&local_interfaces[i].iiAddress; |
524 | if (address->sin_addr.s_addr == addr.s_addr) |
525 | return 1; /* this address is local */ |
526 | } |
527 | } |
528 | return 0; /* this address is not local */ |
529 | } |
530 | |
b804e1e5 |
531 | int sk_address_is_local(SockAddr addr) |
532 | { |
533 | #ifdef IPV6 |
b7a189f3 |
534 | if (addr->family == AF_INET6) { |
535 | FIXME; /* someone who can compile for IPV6 had better do this bit */ |
536 | } else |
b804e1e5 |
537 | #endif |
b7a189f3 |
538 | if (addr->family == AF_INET) { |
b804e1e5 |
539 | struct in_addr a; |
7440fd44 |
540 | a.s_addr = p_htonl(addr->address); |
a143ea0a |
541 | return ipv4_is_local_addr(a); |
b804e1e5 |
542 | } else { |
b7a189f3 |
543 | assert(addr->family == AF_UNSPEC); |
544 | return 0; /* we don't know; assume not */ |
b804e1e5 |
545 | } |
b804e1e5 |
546 | } |
547 | |
6971bbe7 |
548 | int sk_addrtype(SockAddr addr) |
549 | { |
b7a189f3 |
550 | return (addr->family == AF_INET ? ADDRTYPE_IPV4 : |
551 | #ifdef IPV6 |
552 | addr->family == AF_INET6 ? ADDRTYPE_IPV6 : |
553 | #endif |
554 | ADDRTYPE_NAME); |
6971bbe7 |
555 | } |
556 | |
557 | void sk_addrcopy(SockAddr addr, char *buf) |
558 | { |
b7a189f3 |
559 | assert(addr->family != AF_UNSPEC); |
6971bbe7 |
560 | #ifdef IPV6 |
b7a189f3 |
561 | if (addr->family == AF_INET6) { |
562 | memcpy(buf, (char*) addr->ai, 16); |
563 | } else |
6971bbe7 |
564 | #endif |
b7a189f3 |
565 | if (addr->family == AF_INET) { |
6971bbe7 |
566 | struct in_addr a; |
7440fd44 |
567 | a.s_addr = p_htonl(addr->address); |
96d9eb89 |
568 | memcpy(buf, (char*) &a.s_addr, 4); |
6971bbe7 |
569 | } |
6971bbe7 |
570 | } |
571 | |
32874aea |
572 | void sk_addr_free(SockAddr addr) |
573 | { |
2f75bae1 |
574 | sfree(addr); |
575 | } |
576 | |
32874aea |
577 | static Plug sk_tcp_plug(Socket sock, Plug p) |
578 | { |
7e78000d |
579 | Actual_Socket s = (Actual_Socket) sock; |
580 | Plug ret = s->plug; |
32874aea |
581 | if (p) |
582 | s->plug = p; |
7e78000d |
583 | return ret; |
584 | } |
585 | |
32874aea |
586 | static void sk_tcp_flush(Socket s) |
587 | { |
7e78000d |
588 | /* |
589 | * We send data to the socket as soon as we can anyway, |
590 | * so we don't need to do anything here. :-) |
591 | */ |
592 | } |
593 | |
2d466ffd |
594 | static void sk_tcp_close(Socket s); |
e0e7dff8 |
595 | static int sk_tcp_write(Socket s, const char *data, int len); |
596 | static int sk_tcp_write_oob(Socket s, const char *data, int len); |
8eebd221 |
597 | static void sk_tcp_set_private_ptr(Socket s, void *ptr); |
598 | static void *sk_tcp_get_private_ptr(Socket s); |
599 | static void sk_tcp_set_frozen(Socket s, int is_frozen); |
cbe2d68f |
600 | static const char *sk_tcp_socket_error(Socket s); |
7e78000d |
601 | |
d74d141c |
602 | extern char *do_select(SOCKET skt, int startup); |
603 | |
604 | Socket sk_register(void *sock, Plug plug) |
605 | { |
c85623f9 |
606 | static const struct socket_function_table fn_table = { |
d74d141c |
607 | sk_tcp_plug, |
608 | sk_tcp_close, |
609 | sk_tcp_write, |
610 | sk_tcp_write_oob, |
611 | sk_tcp_flush, |
8eebd221 |
612 | sk_tcp_set_private_ptr, |
613 | sk_tcp_get_private_ptr, |
614 | sk_tcp_set_frozen, |
d74d141c |
615 | sk_tcp_socket_error |
616 | }; |
617 | |
618 | DWORD err; |
619 | char *errstr; |
620 | Actual_Socket ret; |
621 | |
622 | /* |
623 | * Create Socket structure. |
624 | */ |
3d88e64d |
625 | ret = snew(struct Socket_tag); |
d74d141c |
626 | ret->fn = &fn_table; |
627 | ret->error = NULL; |
628 | ret->plug = plug; |
5471d09a |
629 | bufchain_init(&ret->output_data); |
d74d141c |
630 | ret->writable = 1; /* to start with */ |
631 | ret->sending_oob = 0; |
632 | ret->frozen = 1; |
5471d09a |
633 | ret->frozen_readable = 0; |
bc4802a1 |
634 | ret->localhost_only = 0; /* unused, but best init anyway */ |
7732d38a |
635 | ret->pending_error = 0; |
d74d141c |
636 | |
637 | ret->s = (SOCKET)sock; |
638 | |
639 | if (ret->s == INVALID_SOCKET) { |
7440fd44 |
640 | err = p_WSAGetLastError(); |
d74d141c |
641 | ret->error = winsock_error_string(err); |
642 | return (Socket) ret; |
643 | } |
644 | |
645 | ret->oobinline = 0; |
646 | |
647 | /* Set up a select mechanism. This could be an AsyncSelect on a |
648 | * window, or an EventSelect on an event object. */ |
649 | errstr = do_select(ret->s, 1); |
650 | if (errstr) { |
651 | ret->error = errstr; |
652 | return (Socket) ret; |
653 | } |
654 | |
655 | add234(sktree, ret); |
656 | |
657 | return (Socket) ret; |
658 | } |
659 | |
4b1e8acc |
660 | Socket sk_new(SockAddr addr, int port, int privport, int oobinline, |
79bf227b |
661 | int nodelay, int keepalive, Plug plug) |
7e78000d |
662 | { |
c85623f9 |
663 | static const struct socket_function_table fn_table = { |
7e78000d |
664 | sk_tcp_plug, |
665 | sk_tcp_close, |
666 | sk_tcp_write, |
667 | sk_tcp_write_oob, |
668 | sk_tcp_flush, |
8eebd221 |
669 | sk_tcp_set_private_ptr, |
670 | sk_tcp_get_private_ptr, |
671 | sk_tcp_set_frozen, |
7e78000d |
672 | sk_tcp_socket_error |
673 | }; |
674 | |
2f75bae1 |
675 | SOCKET s; |
c4d8e107 |
676 | #ifdef IPV6 |
677 | SOCKADDR_IN6 a6; |
678 | #endif |
2f75bae1 |
679 | SOCKADDR_IN a; |
680 | DWORD err; |
681 | char *errstr; |
7e78000d |
682 | Actual_Socket ret; |
c91409da |
683 | short localport; |
2f75bae1 |
684 | |
685 | /* |
686 | * Create Socket structure. |
687 | */ |
3d88e64d |
688 | ret = snew(struct Socket_tag); |
7e78000d |
689 | ret->fn = &fn_table; |
2f75bae1 |
690 | ret->error = NULL; |
7e78000d |
691 | ret->plug = plug; |
5471d09a |
692 | bufchain_init(&ret->output_data); |
3ad9d396 |
693 | ret->connected = 0; /* to start with */ |
694 | ret->writable = 0; /* to start with */ |
33232c8f |
695 | ret->sending_oob = 0; |
d74d141c |
696 | ret->frozen = 0; |
5471d09a |
697 | ret->frozen_readable = 0; |
bc4802a1 |
698 | ret->localhost_only = 0; /* unused, but best init anyway */ |
7732d38a |
699 | ret->pending_error = 0; |
2f75bae1 |
700 | |
701 | /* |
702 | * Open socket. |
703 | */ |
b7a189f3 |
704 | assert(addr->family != AF_UNSPEC); |
7440fd44 |
705 | s = p_socket(addr->family, SOCK_STREAM, 0); |
2f75bae1 |
706 | ret->s = s; |
707 | |
708 | if (s == INVALID_SOCKET) { |
7440fd44 |
709 | err = p_WSAGetLastError(); |
32874aea |
710 | ret->error = winsock_error_string(err); |
7e78000d |
711 | return (Socket) ret; |
2f75bae1 |
712 | } |
4b1e8acc |
713 | |
714 | ret->oobinline = oobinline; |
715 | if (oobinline) { |
1ad4eb6f |
716 | BOOL b = TRUE; |
7440fd44 |
717 | p_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (void *) &b, sizeof(b)); |
1ad4eb6f |
718 | } |
2f75bae1 |
719 | |
2184a5d9 |
720 | if (nodelay) { |
721 | BOOL b = TRUE; |
7440fd44 |
722 | p_setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (void *) &b, sizeof(b)); |
2184a5d9 |
723 | } |
724 | |
79bf227b |
725 | if (keepalive) { |
726 | BOOL b = TRUE; |
727 | p_setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *) &b, sizeof(b)); |
728 | } |
729 | |
2f75bae1 |
730 | /* |
731 | * Bind to local address. |
732 | */ |
c91409da |
733 | if (privport) |
32874aea |
734 | localport = 1023; /* count from 1023 downwards */ |
c4d8e107 |
735 | else |
32874aea |
736 | localport = 0; /* just use port 0 (ie winsock picks) */ |
c91409da |
737 | |
738 | /* Loop round trying to bind */ |
739 | while (1) { |
32874aea |
740 | int retcode; |
c91409da |
741 | |
742 | #ifdef IPV6 |
32874aea |
743 | if (addr->family == AF_INET6) { |
744 | memset(&a6, 0, sizeof(a6)); |
745 | a6.sin6_family = AF_INET6; |
746 | /*a6.sin6_addr = in6addr_any; *//* == 0 */ |
7440fd44 |
747 | a6.sin6_port = p_htons(localport); |
32874aea |
748 | } else |
c4d8e107 |
749 | #endif |
32874aea |
750 | { |
751 | a.sin_family = AF_INET; |
7440fd44 |
752 | a.sin_addr.s_addr = p_htonl(INADDR_ANY); |
753 | a.sin_port = p_htons(localport); |
32874aea |
754 | } |
c4d8e107 |
755 | #ifdef IPV6 |
7440fd44 |
756 | retcode = p_bind(s, (addr->family == AF_INET6 ? |
32874aea |
757 | (struct sockaddr *) &a6 : |
758 | (struct sockaddr *) &a), |
759 | (addr->family == |
760 | AF_INET6 ? sizeof(a6) : sizeof(a))); |
c4d8e107 |
761 | #else |
7440fd44 |
762 | retcode = p_bind(s, (struct sockaddr *) &a, sizeof(a)); |
c4d8e107 |
763 | #endif |
32874aea |
764 | if (retcode != SOCKET_ERROR) { |
765 | err = 0; |
766 | break; /* done */ |
767 | } else { |
7440fd44 |
768 | err = p_WSAGetLastError(); |
32874aea |
769 | if (err != WSAEADDRINUSE) /* failed, for a bad reason */ |
770 | break; |
771 | } |
772 | |
773 | if (localport == 0) |
774 | break; /* we're only looping once */ |
775 | localport--; |
776 | if (localport == 0) |
777 | break; /* we might have got to the end */ |
c91409da |
778 | } |
779 | |
32874aea |
780 | if (err) { |
c4d8e107 |
781 | ret->error = winsock_error_string(err); |
7e78000d |
782 | return (Socket) ret; |
2f75bae1 |
783 | } |
784 | |
785 | /* |
786 | * Connect to remote address. |
787 | */ |
c4d8e107 |
788 | #ifdef IPV6 |
32874aea |
789 | if (addr->family == AF_INET6) { |
790 | memset(&a, 0, sizeof(a)); |
c4d8e107 |
791 | a6.sin6_family = AF_INET6; |
7440fd44 |
792 | a6.sin6_port = p_htons((short) port); |
32874aea |
793 | a6.sin6_addr = |
794 | ((struct sockaddr_in6 *) addr->ai->ai_addr)->sin6_addr; |
795 | } else |
c4d8e107 |
796 | #endif |
32874aea |
797 | { |
c4d8e107 |
798 | a.sin_family = AF_INET; |
7440fd44 |
799 | a.sin_addr.s_addr = p_htonl(addr->address); |
800 | a.sin_port = p_htons((short) port); |
c4d8e107 |
801 | } |
3ad9d396 |
802 | |
803 | /* Set up a select mechanism. This could be an AsyncSelect on a |
804 | * window, or an EventSelect on an event object. */ |
805 | errstr = do_select(s, 1); |
806 | if (errstr) { |
807 | ret->error = errstr; |
808 | return (Socket) ret; |
809 | } |
810 | |
32874aea |
811 | if (( |
812 | #ifdef IPV6 |
7440fd44 |
813 | p_connect(s, ((addr->family == AF_INET6) ? |
32874aea |
814 | (struct sockaddr *) &a6 : (struct sockaddr *) &a), |
815 | (addr->family == AF_INET6) ? sizeof(a6) : sizeof(a)) |
c4d8e107 |
816 | #else |
7440fd44 |
817 | p_connect(s, (struct sockaddr *) &a, sizeof(a)) |
c4d8e107 |
818 | #endif |
32874aea |
819 | ) == SOCKET_ERROR) { |
7440fd44 |
820 | err = p_WSAGetLastError(); |
3ad9d396 |
821 | /* |
822 | * We expect a potential EWOULDBLOCK here, because the |
823 | * chances are the front end has done a select for |
824 | * FD_CONNECT, so that connect() will complete |
825 | * asynchronously. |
826 | */ |
827 | if ( err != WSAEWOULDBLOCK ) { |
828 | ret->error = winsock_error_string(err); |
829 | return (Socket) ret; |
830 | } |
831 | } else { |
832 | /* |
833 | * If we _don't_ get EWOULDBLOCK, the connect has completed |
834 | * and we should set the socket as writable. |
835 | */ |
836 | ret->writable = 1; |
2f75bae1 |
837 | } |
838 | |
839 | add234(sktree, ret); |
840 | |
f85e6f6e |
841 | /* We're done with 'addr' now. */ |
842 | sk_addr_free(addr); |
843 | |
7e78000d |
844 | return (Socket) ret; |
2f75bae1 |
845 | } |
846 | |
6ee9b735 |
847 | Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only) |
d74d141c |
848 | { |
c85623f9 |
849 | static const struct socket_function_table fn_table = { |
d74d141c |
850 | sk_tcp_plug, |
851 | sk_tcp_close, |
852 | sk_tcp_write, |
853 | sk_tcp_write_oob, |
854 | sk_tcp_flush, |
8eebd221 |
855 | sk_tcp_set_private_ptr, |
856 | sk_tcp_get_private_ptr, |
857 | sk_tcp_set_frozen, |
d74d141c |
858 | sk_tcp_socket_error |
859 | }; |
860 | |
861 | SOCKET s; |
862 | #ifdef IPV6 |
863 | SOCKADDR_IN6 a6; |
864 | #endif |
865 | SOCKADDR_IN a; |
866 | DWORD err; |
867 | char *errstr; |
868 | Actual_Socket ret; |
869 | int retcode; |
870 | int on = 1; |
871 | |
872 | /* |
873 | * Create Socket structure. |
874 | */ |
3d88e64d |
875 | ret = snew(struct Socket_tag); |
d74d141c |
876 | ret->fn = &fn_table; |
877 | ret->error = NULL; |
878 | ret->plug = plug; |
5471d09a |
879 | bufchain_init(&ret->output_data); |
d74d141c |
880 | ret->writable = 0; /* to start with */ |
881 | ret->sending_oob = 0; |
882 | ret->frozen = 0; |
5471d09a |
883 | ret->frozen_readable = 0; |
bc4802a1 |
884 | ret->localhost_only = local_host_only; |
7732d38a |
885 | ret->pending_error = 0; |
d74d141c |
886 | |
887 | /* |
888 | * Open socket. |
889 | */ |
7440fd44 |
890 | s = p_socket(AF_INET, SOCK_STREAM, 0); |
d74d141c |
891 | ret->s = s; |
892 | |
893 | if (s == INVALID_SOCKET) { |
7440fd44 |
894 | err = p_WSAGetLastError(); |
d74d141c |
895 | ret->error = winsock_error_string(err); |
896 | return (Socket) ret; |
897 | } |
898 | |
899 | ret->oobinline = 0; |
900 | |
7440fd44 |
901 | p_setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *)&on, sizeof(on)); |
d74d141c |
902 | |
d74d141c |
903 | #ifdef IPV6 |
904 | if (addr->family == AF_INET6) { |
905 | memset(&a6, 0, sizeof(a6)); |
906 | a6.sin6_family = AF_INET6; |
6ee9b735 |
907 | /* FIXME: srcaddr is ignored for IPv6, because I (SGT) don't |
908 | * know how to do it. :-) */ |
bcce45ed |
909 | if (local_host_only) |
910 | a6.sin6_addr = in6addr_loopback; |
911 | else |
912 | a6.sin6_addr = in6addr_any; |
7440fd44 |
913 | a6.sin6_port = p_htons(port); |
d74d141c |
914 | } else |
915 | #endif |
916 | { |
6ee9b735 |
917 | int got_addr = 0; |
d74d141c |
918 | a.sin_family = AF_INET; |
6ee9b735 |
919 | |
920 | /* |
921 | * Bind to source address. First try an explicitly |
922 | * specified one... |
923 | */ |
924 | if (srcaddr) { |
7440fd44 |
925 | a.sin_addr.s_addr = p_inet_addr(srcaddr); |
6ee9b735 |
926 | if (a.sin_addr.s_addr != INADDR_NONE) { |
927 | /* Override localhost_only with specified listen addr. */ |
928 | ret->localhost_only = ipv4_is_loopback(a.sin_addr); |
929 | got_addr = 1; |
930 | } |
931 | } |
932 | |
933 | /* |
934 | * ... and failing that, go with one of the standard ones. |
935 | */ |
936 | if (!got_addr) { |
937 | if (local_host_only) |
7440fd44 |
938 | a.sin_addr.s_addr = p_htonl(INADDR_LOOPBACK); |
6ee9b735 |
939 | else |
7440fd44 |
940 | a.sin_addr.s_addr = p_htonl(INADDR_ANY); |
6ee9b735 |
941 | } |
942 | |
7440fd44 |
943 | a.sin_port = p_htons((short)port); |
d74d141c |
944 | } |
945 | #ifdef IPV6 |
7440fd44 |
946 | retcode = p_bind(s, (addr->family == AF_INET6 ? |
d74d141c |
947 | (struct sockaddr *) &a6 : |
948 | (struct sockaddr *) &a), |
949 | (addr->family == |
950 | AF_INET6 ? sizeof(a6) : sizeof(a))); |
951 | #else |
7440fd44 |
952 | retcode = p_bind(s, (struct sockaddr *) &a, sizeof(a)); |
d74d141c |
953 | #endif |
954 | if (retcode != SOCKET_ERROR) { |
955 | err = 0; |
956 | } else { |
7440fd44 |
957 | err = p_WSAGetLastError(); |
d74d141c |
958 | } |
959 | |
960 | if (err) { |
961 | ret->error = winsock_error_string(err); |
962 | return (Socket) ret; |
963 | } |
964 | |
965 | |
7440fd44 |
966 | if (p_listen(s, SOMAXCONN) == SOCKET_ERROR) { |
967 | p_closesocket(s); |
d74d141c |
968 | ret->error = winsock_error_string(err); |
969 | return (Socket) ret; |
970 | } |
971 | |
972 | /* Set up a select mechanism. This could be an AsyncSelect on a |
973 | * window, or an EventSelect on an event object. */ |
974 | errstr = do_select(s, 1); |
975 | if (errstr) { |
976 | ret->error = errstr; |
977 | return (Socket) ret; |
978 | } |
979 | |
980 | add234(sktree, ret); |
981 | |
982 | return (Socket) ret; |
983 | } |
984 | |
32874aea |
985 | static void sk_tcp_close(Socket sock) |
986 | { |
9c964e85 |
987 | extern char *do_select(SOCKET skt, int startup); |
7e78000d |
988 | Actual_Socket s = (Actual_Socket) sock; |
9c964e85 |
989 | |
2f75bae1 |
990 | del234(sktree, s); |
991 | do_select(s->s, 0); |
7440fd44 |
992 | p_closesocket(s->s); |
dcbde236 |
993 | sfree(s); |
2f75bae1 |
994 | } |
995 | |
2f75bae1 |
996 | /* |
997 | * The function which tries to send on a socket once it's deemed |
998 | * writable. |
999 | */ |
32874aea |
1000 | void try_send(Actual_Socket s) |
1001 | { |
5471d09a |
1002 | while (s->sending_oob || bufchain_size(&s->output_data) > 0) { |
2f75bae1 |
1003 | int nsent; |
1004 | DWORD err; |
5471d09a |
1005 | void *data; |
32874aea |
1006 | int len, urgentflag; |
1007 | |
1008 | if (s->sending_oob) { |
1009 | urgentflag = MSG_OOB; |
1010 | len = s->sending_oob; |
5471d09a |
1011 | data = &s->oobdata; |
32874aea |
1012 | } else { |
1013 | urgentflag = 0; |
5471d09a |
1014 | bufchain_prefix(&s->output_data, &data, &len); |
32874aea |
1015 | } |
7440fd44 |
1016 | nsent = p_send(s->s, data, len, urgentflag); |
32874aea |
1017 | noise_ultralight(nsent); |
2f75bae1 |
1018 | if (nsent <= 0) { |
7440fd44 |
1019 | err = (nsent < 0 ? p_WSAGetLastError() : 0); |
e5eb3a1c |
1020 | if ((err < WSABASEERR && nsent < 0) || err == WSAEWOULDBLOCK) { |
d40a94b9 |
1021 | /* |
1022 | * Perfectly normal: we've sent all we can for the moment. |
1023 | * |
e5eb3a1c |
1024 | * (Some WinSock send() implementations can return |
1025 | * <0 but leave no sensible error indication - |
1026 | * WSAGetLastError() is called but returns zero or |
1027 | * a small number - so we check that case and treat |
1028 | * it just like WSAEWOULDBLOCK.) |
d40a94b9 |
1029 | */ |
2f75bae1 |
1030 | s->writable = FALSE; |
32874aea |
1031 | return; |
2f75bae1 |
1032 | } else if (nsent == 0 || |
32874aea |
1033 | err == WSAECONNABORTED || err == WSAECONNRESET) { |
1034 | /* |
7732d38a |
1035 | * If send() returns CONNABORTED or CONNRESET, we |
1036 | * unfortunately can't just call plug_closing(), |
1037 | * because it's quite likely that we're currently |
1038 | * _in_ a call from the code we'd be calling back |
1039 | * to, so we'd have to make half the SSH code |
1040 | * reentrant. Instead we flag a pending error on |
1041 | * the socket, to be dealt with (by calling |
1042 | * plug_closing()) at some suitable future moment. |
32874aea |
1043 | */ |
7732d38a |
1044 | s->pending_error = err; |
1045 | return; |
2f75bae1 |
1046 | } else { |
a8327734 |
1047 | /* We're inside the Windows frontend here, so we know |
1048 | * that the frontend handle is unnecessary. */ |
1049 | logevent(NULL, winsock_error_string(err)); |
247308b5 |
1050 | fatalbox("%s", winsock_error_string(err)); |
2f75bae1 |
1051 | } |
1052 | } else { |
5471d09a |
1053 | if (s->sending_oob) { |
1054 | if (nsent < len) { |
1055 | memmove(s->oobdata, s->oobdata+nsent, len-nsent); |
1056 | s->sending_oob = len - nsent; |
1057 | } else { |
1058 | s->sending_oob = 0; |
1059 | } |
1060 | } else { |
1061 | bufchain_consume(&s->output_data, nsent); |
2f75bae1 |
1062 | } |
1063 | } |
1064 | } |
1065 | } |
1066 | |
e0e7dff8 |
1067 | static int sk_tcp_write(Socket sock, const char *buf, int len) |
32874aea |
1068 | { |
7e78000d |
1069 | Actual_Socket s = (Actual_Socket) sock; |
1070 | |
2f75bae1 |
1071 | /* |
1072 | * Add the data to the buffer list on the socket. |
1073 | */ |
5471d09a |
1074 | bufchain_add(&s->output_data, buf, len); |
2f75bae1 |
1075 | |
1076 | /* |
1077 | * Now try sending from the start of the buffer list. |
1078 | */ |
1079 | if (s->writable) |
1080 | try_send(s); |
5471d09a |
1081 | |
1082 | return bufchain_size(&s->output_data); |
2f75bae1 |
1083 | } |
1084 | |
e0e7dff8 |
1085 | static int sk_tcp_write_oob(Socket sock, const char *buf, int len) |
32874aea |
1086 | { |
7e78000d |
1087 | Actual_Socket s = (Actual_Socket) sock; |
1088 | |
2f75bae1 |
1089 | /* |
1090 | * Replace the buffer list on the socket with the data. |
1091 | */ |
5471d09a |
1092 | bufchain_clear(&s->output_data); |
1093 | assert(len <= sizeof(s->oobdata)); |
1094 | memcpy(s->oobdata, buf, len); |
2f75bae1 |
1095 | s->sending_oob = len; |
1096 | |
1097 | /* |
1098 | * Now try sending from the start of the buffer list. |
1099 | */ |
1100 | if (s->writable) |
1101 | try_send(s); |
5471d09a |
1102 | |
1103 | return s->sending_oob; |
2f75bae1 |
1104 | } |
1105 | |
32874aea |
1106 | int select_result(WPARAM wParam, LPARAM lParam) |
1107 | { |
f9d3f227 |
1108 | int ret, open; |
2f75bae1 |
1109 | DWORD err; |
b675c612 |
1110 | char buf[20480]; /* nice big buffer for plenty of speed */ |
7e78000d |
1111 | Actual_Socket s; |
49bad831 |
1112 | u_long atmark; |
2f75bae1 |
1113 | |
1114 | /* wParam is the socket itself */ |
cc8b0ee9 |
1115 | |
ce6fcfa5 |
1116 | if (wParam == 0) |
1117 | return 1; /* boggle */ |
cc8b0ee9 |
1118 | |
32874aea |
1119 | s = find234(sktree, (void *) wParam, cmpforsearch); |
2f75bae1 |
1120 | if (!s) |
1121 | return 1; /* boggle */ |
1122 | |
1123 | if ((err = WSAGETSELECTERROR(lParam)) != 0) { |
32874aea |
1124 | /* |
1125 | * An error has occurred on this socket. Pass it to the |
1126 | * plug. |
1127 | */ |
1128 | return plug_closing(s->plug, winsock_error_string(err), err, 0); |
2f75bae1 |
1129 | } |
1130 | |
7d6ee6ff |
1131 | noise_ultralight(lParam); |
1132 | |
2f75bae1 |
1133 | switch (WSAGETSELECTEVENT(lParam)) { |
3ad9d396 |
1134 | case FD_CONNECT: |
1135 | s->connected = s->writable = 1; |
1136 | break; |
2f75bae1 |
1137 | case FD_READ: |
d74d141c |
1138 | /* In the case the socket is still frozen, we don't even bother */ |
5471d09a |
1139 | if (s->frozen) { |
1140 | s->frozen_readable = 1; |
d74d141c |
1141 | break; |
5471d09a |
1142 | } |
d74d141c |
1143 | |
32874aea |
1144 | /* |
1145 | * We have received data on the socket. For an oobinline |
1146 | * socket, this might be data _before_ an urgent pointer, |
1147 | * in which case we send it to the back end with type==1 |
1148 | * (data prior to urgent). |
1149 | */ |
1150 | if (s->oobinline) { |
1151 | atmark = 1; |
7440fd44 |
1152 | p_ioctlsocket(s->s, SIOCATMARK, &atmark); |
32874aea |
1153 | /* |
1154 | * Avoid checking the return value from ioctlsocket(), |
1155 | * on the grounds that some WinSock wrappers don't |
1156 | * support it. If it does nothing, we get atmark==1, |
1157 | * which is equivalent to `no OOB pending', so the |
1158 | * effect will be to non-OOB-ify any OOB data. |
1159 | */ |
1160 | } else |
1161 | atmark = 1; |
4b1e8acc |
1162 | |
7440fd44 |
1163 | ret = p_recv(s->s, buf, sizeof(buf), 0); |
32874aea |
1164 | noise_ultralight(ret); |
2f75bae1 |
1165 | if (ret < 0) { |
7440fd44 |
1166 | err = p_WSAGetLastError(); |
2f75bae1 |
1167 | if (err == WSAEWOULDBLOCK) { |
1168 | break; |
1169 | } |
1170 | } |
1171 | if (ret < 0) { |
32874aea |
1172 | return plug_closing(s->plug, winsock_error_string(err), err, |
1173 | 0); |
7e78000d |
1174 | } else if (0 == ret) { |
32874aea |
1175 | return plug_closing(s->plug, NULL, 0, 0); |
2f75bae1 |
1176 | } else { |
32874aea |
1177 | return plug_receive(s->plug, atmark ? 0 : 1, buf, ret); |
2f75bae1 |
1178 | } |
1179 | break; |
1180 | case FD_OOB: |
32874aea |
1181 | /* |
1182 | * This will only happen on a non-oobinline socket. It |
1183 | * indicates that we can immediately perform an OOB read |
1184 | * and get back OOB data, which we will send to the back |
1185 | * end with type==2 (urgent data). |
1186 | */ |
7440fd44 |
1187 | ret = p_recv(s->s, buf, sizeof(buf), MSG_OOB); |
32874aea |
1188 | noise_ultralight(ret); |
1189 | if (ret <= 0) { |
247308b5 |
1190 | char *str = (ret == 0 ? "Internal networking trouble" : |
7440fd44 |
1191 | winsock_error_string(p_WSAGetLastError())); |
a8327734 |
1192 | /* We're inside the Windows frontend here, so we know |
1193 | * that the frontend handle is unnecessary. */ |
1194 | logevent(NULL, str); |
247308b5 |
1195 | fatalbox("%s", str); |
32874aea |
1196 | } else { |
1197 | return plug_receive(s->plug, 2, buf, ret); |
1198 | } |
1199 | break; |
2f75bae1 |
1200 | case FD_WRITE: |
5471d09a |
1201 | { |
1202 | int bufsize_before, bufsize_after; |
1203 | s->writable = 1; |
1204 | bufsize_before = s->sending_oob + bufchain_size(&s->output_data); |
1205 | try_send(s); |
1206 | bufsize_after = s->sending_oob + bufchain_size(&s->output_data); |
1207 | if (bufsize_after < bufsize_before) |
1208 | plug_sent(s->plug, bufsize_after); |
1209 | } |
2f75bae1 |
1210 | break; |
1211 | case FD_CLOSE: |
f9d3f227 |
1212 | /* Signal a close on the socket. First read any outstanding data. */ |
32874aea |
1213 | open = 1; |
1214 | do { |
7440fd44 |
1215 | ret = p_recv(s->s, buf, sizeof(buf), 0); |
32874aea |
1216 | if (ret < 0) { |
7440fd44 |
1217 | err = p_WSAGetLastError(); |
32874aea |
1218 | if (err == WSAEWOULDBLOCK) |
1219 | break; |
1220 | return plug_closing(s->plug, winsock_error_string(err), |
1221 | err, 0); |
1222 | } else { |
1223 | if (ret) |
1224 | open &= plug_receive(s->plug, 0, buf, ret); |
1225 | else |
1226 | open &= plug_closing(s->plug, NULL, 0, 0); |
7e78000d |
1227 | } |
f9d3f227 |
1228 | } while (ret > 0); |
32874aea |
1229 | return open; |
d74d141c |
1230 | case FD_ACCEPT: |
1231 | { |
bc4802a1 |
1232 | struct sockaddr_in isa; |
1233 | int addrlen = sizeof(struct sockaddr_in); |
bcce45ed |
1234 | SOCKET t; /* socket of connection */ |
1235 | |
bc4802a1 |
1236 | memset(&isa, 0, sizeof(struct sockaddr_in)); |
bcce45ed |
1237 | err = 0; |
7440fd44 |
1238 | t = p_accept(s->s,(struct sockaddr *)&isa,&addrlen); |
bcce45ed |
1239 | if (t == INVALID_SOCKET) |
1240 | { |
7440fd44 |
1241 | err = p_WSAGetLastError(); |
bcce45ed |
1242 | if (err == WSATRY_AGAIN) |
1243 | break; |
1244 | } |
1245 | |
a143ea0a |
1246 | if (s->localhost_only && !ipv4_is_local_addr(isa.sin_addr)) { |
7440fd44 |
1247 | p_closesocket(t); /* dodgy WinSock let nonlocal through */ |
bc4802a1 |
1248 | } else if (plug_accepting(s->plug, (void*)t)) { |
7440fd44 |
1249 | p_closesocket(t); /* denied or error */ |
bcce45ed |
1250 | } |
d74d141c |
1251 | } |
2f75bae1 |
1252 | } |
1253 | |
1254 | return 1; |
1255 | } |
1256 | |
1257 | /* |
7732d38a |
1258 | * Deal with socket errors detected in try_send(). |
1259 | */ |
1260 | void net_pending_errors(void) |
1261 | { |
1262 | int i; |
1263 | Actual_Socket s; |
1264 | |
1265 | /* |
1266 | * This might be a fiddly business, because it's just possible |
1267 | * that handling a pending error on one socket might cause |
1268 | * others to be closed. (I can't think of any reason this might |
1269 | * happen in current SSH implementation, but to maintain |
1270 | * generality of this network layer I'll assume the worst.) |
1271 | * |
1272 | * So what we'll do is search the socket list for _one_ socket |
1273 | * with a pending error, and then handle it, and then search |
1274 | * the list again _from the beginning_. Repeat until we make a |
1275 | * pass with no socket errors present. That way we are |
1276 | * protected against the socket list changing under our feet. |
1277 | */ |
1278 | |
1279 | do { |
1280 | for (i = 0; (s = index234(sktree, i)) != NULL; i++) { |
1281 | if (s->pending_error) { |
1282 | /* |
1283 | * An error has occurred on this socket. Pass it to the |
1284 | * plug. |
1285 | */ |
1286 | plug_closing(s->plug, |
1287 | winsock_error_string(s->pending_error), |
1288 | s->pending_error, 0); |
1289 | break; |
1290 | } |
1291 | } |
1292 | } while (s); |
1293 | } |
1294 | |
1295 | /* |
2f75bae1 |
1296 | * Each socket abstraction contains a `void *' private field in |
1297 | * which the client can keep state. |
1298 | */ |
8eebd221 |
1299 | static void sk_tcp_set_private_ptr(Socket sock, void *ptr) |
32874aea |
1300 | { |
7e78000d |
1301 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1302 | s->private_ptr = ptr; |
1303 | } |
32874aea |
1304 | |
8eebd221 |
1305 | static void *sk_tcp_get_private_ptr(Socket sock) |
32874aea |
1306 | { |
7e78000d |
1307 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1308 | return s->private_ptr; |
1309 | } |
1310 | |
1311 | /* |
1312 | * Special error values are returned from sk_namelookup and sk_new |
1313 | * if there's a problem. These functions extract an error message, |
1314 | * or return NULL if there's no problem. |
1315 | */ |
cbe2d68f |
1316 | const char *sk_addr_error(SockAddr addr) |
32874aea |
1317 | { |
2f75bae1 |
1318 | return addr->error; |
1319 | } |
cbe2d68f |
1320 | static const char *sk_tcp_socket_error(Socket sock) |
32874aea |
1321 | { |
7e78000d |
1322 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1323 | return s->error; |
1324 | } |
1325 | |
8eebd221 |
1326 | static void sk_tcp_set_frozen(Socket sock, int is_frozen) |
d74d141c |
1327 | { |
1328 | Actual_Socket s = (Actual_Socket) sock; |
5471d09a |
1329 | if (s->frozen == is_frozen) |
1330 | return; |
d74d141c |
1331 | s->frozen = is_frozen; |
5471d09a |
1332 | if (!is_frozen && s->frozen_readable) { |
d74d141c |
1333 | char c; |
7440fd44 |
1334 | p_recv(s->s, &c, 1, MSG_PEEK); |
d74d141c |
1335 | } |
5471d09a |
1336 | s->frozen_readable = 0; |
d74d141c |
1337 | } |
1338 | |
2f75bae1 |
1339 | /* |
1340 | * For Plink: enumerate all sockets currently active. |
1341 | */ |
32874aea |
1342 | SOCKET first_socket(int *state) |
1343 | { |
d2371c81 |
1344 | Actual_Socket s; |
1345 | *state = 0; |
1346 | s = index234(sktree, (*state)++); |
2f75bae1 |
1347 | return s ? s->s : INVALID_SOCKET; |
1348 | } |
32874aea |
1349 | |
1350 | SOCKET next_socket(int *state) |
1351 | { |
d2371c81 |
1352 | Actual_Socket s = index234(sktree, (*state)++); |
2f75bae1 |
1353 | return s ? s->s : INVALID_SOCKET; |
1354 | } |
68a49acb |
1355 | |
1356 | int net_service_lookup(char *service) |
1357 | { |
1358 | struct servent *se; |
7440fd44 |
1359 | se = p_getservbyname(service, NULL); |
68a49acb |
1360 | if (se != NULL) |
7440fd44 |
1361 | return p_ntohs(se->s_port); |
68a49acb |
1362 | else |
1363 | return 0; |
1364 | } |
fc0f17db |
1365 | |
1366 | SockAddr platform_get_x11_unix_address(int displaynum, char **canonicalname) |
1367 | { |
1368 | SockAddr ret = snew(struct SockAddr_tag); |
1369 | memset(ret, 0, sizeof(struct SockAddr_tag)); |
1370 | ret->error = "unix sockets not supported on this platform"; |
1371 | return ret; |
1372 | } |