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 | |
2f75bae1 |
27 | struct Socket_tag { |
c85623f9 |
28 | const struct socket_function_table *fn; |
7e78000d |
29 | /* the above variable absolutely *must* be the first in this structure */ |
2f75bae1 |
30 | char *error; |
31 | SOCKET s; |
7e78000d |
32 | Plug plug; |
2f75bae1 |
33 | void *private_ptr; |
5471d09a |
34 | bufchain output_data; |
3ad9d396 |
35 | int connected; |
2f75bae1 |
36 | int writable; |
5471d09a |
37 | int frozen; /* this causes readability notifications to be ignored */ |
38 | int frozen_readable; /* this means we missed at least one readability |
39 | * notification while we were frozen */ |
bc4802a1 |
40 | int localhost_only; /* for listening sockets */ |
5471d09a |
41 | char oobdata[1]; |
1ad4eb6f |
42 | int sending_oob; |
4b1e8acc |
43 | int oobinline; |
7732d38a |
44 | int pending_error; /* in case send() returns error */ |
2f75bae1 |
45 | }; |
46 | |
7e78000d |
47 | /* |
48 | * We used to typedef struct Socket_tag *Socket. |
49 | * |
50 | * Since we have made the networking abstraction slightly more |
51 | * abstract, Socket no longer means a tcp socket (it could mean |
52 | * an ssl socket). So now we must use Actual_Socket when we know |
53 | * we are talking about a tcp socket. |
54 | */ |
55 | typedef struct Socket_tag *Actual_Socket; |
56 | |
2f75bae1 |
57 | struct SockAddr_tag { |
58 | char *error; |
b7a189f3 |
59 | /* |
60 | * Which address family this address belongs to. AF_INET for |
61 | * IPv4; AF_INET6 for IPv6; AF_UNSPEC indicates that name |
62 | * resolution has not been done and a simple host name is held |
63 | * in this SockAddr structure. |
05581745 |
64 | * The hostname field is also used when the hostname has both |
65 | * an IPv6 and IPv4 address and the IPv6 connection attempt |
66 | * fails. We then try the IPv4 address. |
67 | * This 'family' should become an option in the GUI and |
68 | * on the commandline for selecting a default protocol. |
b7a189f3 |
69 | */ |
32874aea |
70 | int family; |
c4d8e107 |
71 | unsigned long address; /* Address IPv4 style. */ |
05581745 |
72 | #ifndef NO_IPV6 |
73 | struct addrinfo *ai; /* Address AF-independent (IPv4+IPv6) style. */ |
c4d8e107 |
74 | #endif |
b7a189f3 |
75 | char hostname[512]; /* Store an unresolved host name. */ |
2f75bae1 |
76 | }; |
77 | |
2f75bae1 |
78 | static tree234 *sktree; |
79 | |
32874aea |
80 | static int cmpfortree(void *av, void *bv) |
81 | { |
82 | Actual_Socket a = (Actual_Socket) av, b = (Actual_Socket) bv; |
83 | unsigned long as = (unsigned long) a->s, bs = (unsigned long) b->s; |
84 | if (as < bs) |
85 | return -1; |
86 | if (as > bs) |
87 | return +1; |
2f75bae1 |
88 | return 0; |
89 | } |
90 | |
32874aea |
91 | static int cmpforsearch(void *av, void *bv) |
92 | { |
93 | Actual_Socket b = (Actual_Socket) bv; |
94 | unsigned long as = (unsigned long) av, 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 | |
7440fd44 |
102 | #define NOTHING |
103 | #define DECL_WINSOCK_FUNCTION(linkage, rettype, name, params) \ |
104 | typedef rettype (WINAPI *t_##name) params; \ |
105 | linkage t_##name p_##name |
106 | #define GET_WINSOCK_FUNCTION(name) \ |
107 | p_##name = (t_##name) GetProcAddress(winsock_module, #name) |
108 | |
109 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAAsyncSelect, |
110 | (SOCKET, HWND, u_int, long)); |
111 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAEventSelect, (SOCKET, WSAEVENT, long)); |
112 | DECL_WINSOCK_FUNCTION(NOTHING, int, select, |
113 | (int, fd_set FAR *, fd_set FAR *, |
114 | fd_set FAR *, const struct timeval FAR *)); |
115 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAGetLastError, (void)); |
116 | DECL_WINSOCK_FUNCTION(NOTHING, int, WSAEnumNetworkEvents, |
117 | (SOCKET, WSAEVENT, LPWSANETWORKEVENTS)); |
118 | DECL_WINSOCK_FUNCTION(static, int, WSAStartup, (WORD, LPWSADATA)); |
119 | DECL_WINSOCK_FUNCTION(static, int, WSACleanup, (void)); |
120 | DECL_WINSOCK_FUNCTION(static, int, closesocket, (SOCKET)); |
121 | DECL_WINSOCK_FUNCTION(static, u_long, ntohl, (u_long)); |
122 | DECL_WINSOCK_FUNCTION(static, u_long, htonl, (u_long)); |
123 | DECL_WINSOCK_FUNCTION(static, u_short, htons, (u_short)); |
124 | DECL_WINSOCK_FUNCTION(static, u_short, ntohs, (u_short)); |
125 | DECL_WINSOCK_FUNCTION(static, struct hostent FAR *, gethostbyname, |
126 | (const char FAR *)); |
127 | DECL_WINSOCK_FUNCTION(static, struct servent FAR *, getservbyname, |
128 | (const char FAR *, const char FAR *)); |
129 | DECL_WINSOCK_FUNCTION(static, unsigned long, inet_addr, (const char FAR *)); |
130 | DECL_WINSOCK_FUNCTION(static, char FAR *, inet_ntoa, (struct in_addr)); |
131 | DECL_WINSOCK_FUNCTION(static, int, connect, |
132 | (SOCKET, const struct sockaddr FAR *, int)); |
133 | DECL_WINSOCK_FUNCTION(static, int, bind, |
134 | (SOCKET, const struct sockaddr FAR *, int)); |
135 | DECL_WINSOCK_FUNCTION(static, int, setsockopt, |
136 | (SOCKET, int, int, const char FAR *, int)); |
137 | DECL_WINSOCK_FUNCTION(static, SOCKET, socket, (int, int, int)); |
138 | DECL_WINSOCK_FUNCTION(static, int, listen, (SOCKET, int)); |
139 | DECL_WINSOCK_FUNCTION(static, int, send, (SOCKET, const char FAR *, int, int)); |
140 | DECL_WINSOCK_FUNCTION(static, int, ioctlsocket, |
141 | (SOCKET, long, u_long FAR *)); |
142 | DECL_WINSOCK_FUNCTION(static, SOCKET, accept, |
143 | (SOCKET, struct sockaddr FAR *, int FAR *)); |
144 | DECL_WINSOCK_FUNCTION(static, int, recv, (SOCKET, char FAR *, int, int)); |
a143ea0a |
145 | DECL_WINSOCK_FUNCTION(static, int, WSAIoctl, |
146 | (SOCKET, DWORD, LPVOID, DWORD, LPVOID, DWORD, |
147 | LPDWORD, LPWSAOVERLAPPED, |
148 | LPWSAOVERLAPPED_COMPLETION_ROUTINE)); |
7440fd44 |
149 | |
150 | static HMODULE winsock_module; |
151 | |
32874aea |
152 | void sk_init(void) |
153 | { |
7440fd44 |
154 | WORD winsock_ver; |
155 | WSADATA wsadata; |
156 | |
157 | winsock_ver = MAKEWORD(2, 0); |
158 | winsock_module = LoadLibrary("WS2_32.DLL"); |
159 | if (!winsock_module) { |
160 | winsock_module = LoadLibrary("WSOCK32.DLL"); |
161 | winsock_ver = MAKEWORD(1, 1); |
162 | } |
163 | if (!winsock_module) |
164 | fatalbox("Unable to load any WinSock library"); |
165 | |
166 | GET_WINSOCK_FUNCTION(WSAAsyncSelect); |
167 | GET_WINSOCK_FUNCTION(WSAEventSelect); |
168 | GET_WINSOCK_FUNCTION(select); |
169 | GET_WINSOCK_FUNCTION(WSAGetLastError); |
170 | GET_WINSOCK_FUNCTION(WSAEnumNetworkEvents); |
171 | GET_WINSOCK_FUNCTION(WSAStartup); |
172 | GET_WINSOCK_FUNCTION(WSACleanup); |
173 | GET_WINSOCK_FUNCTION(closesocket); |
174 | GET_WINSOCK_FUNCTION(ntohl); |
175 | GET_WINSOCK_FUNCTION(htonl); |
176 | GET_WINSOCK_FUNCTION(htons); |
177 | GET_WINSOCK_FUNCTION(ntohs); |
178 | GET_WINSOCK_FUNCTION(gethostbyname); |
179 | GET_WINSOCK_FUNCTION(getservbyname); |
180 | GET_WINSOCK_FUNCTION(inet_addr); |
181 | GET_WINSOCK_FUNCTION(inet_ntoa); |
182 | GET_WINSOCK_FUNCTION(connect); |
183 | GET_WINSOCK_FUNCTION(bind); |
184 | GET_WINSOCK_FUNCTION(setsockopt); |
185 | GET_WINSOCK_FUNCTION(socket); |
186 | GET_WINSOCK_FUNCTION(listen); |
187 | GET_WINSOCK_FUNCTION(send); |
188 | GET_WINSOCK_FUNCTION(ioctlsocket); |
189 | GET_WINSOCK_FUNCTION(accept); |
190 | GET_WINSOCK_FUNCTION(recv); |
a143ea0a |
191 | GET_WINSOCK_FUNCTION(WSAIoctl); |
7440fd44 |
192 | |
193 | if (p_WSAStartup(winsock_ver, &wsadata)) { |
194 | fatalbox("Unable to initialise WinSock"); |
195 | } |
196 | if (LOBYTE(wsadata.wVersion) != LOBYTE(winsock_ver)) { |
197 | p_WSACleanup(); |
198 | fatalbox("WinSock version is incompatible with %d.%d", |
199 | LOBYTE(winsock_ver), HIBYTE(winsock_ver)); |
200 | } |
201 | |
2f75bae1 |
202 | sktree = newtree234(cmpfortree); |
203 | } |
204 | |
93b581bd |
205 | void sk_cleanup(void) |
206 | { |
207 | Actual_Socket s; |
208 | int i; |
209 | |
210 | if (sktree) { |
211 | for (i = 0; (s = index234(sktree, i)) != NULL; i++) { |
7440fd44 |
212 | p_closesocket(s->s); |
93b581bd |
213 | } |
679539d7 |
214 | freetree234(sktree); |
215 | sktree = NULL; |
93b581bd |
216 | } |
7440fd44 |
217 | |
218 | p_WSACleanup(); |
219 | if (winsock_module) |
220 | FreeLibrary(winsock_module); |
93b581bd |
221 | } |
222 | |
32874aea |
223 | char *winsock_error_string(int error) |
224 | { |
e74fbad9 |
225 | switch (error) { |
32874aea |
226 | case WSAEACCES: |
227 | return "Network error: Permission denied"; |
228 | case WSAEADDRINUSE: |
229 | return "Network error: Address already in use"; |
230 | case WSAEADDRNOTAVAIL: |
231 | return "Network error: Cannot assign requested address"; |
232 | case WSAEAFNOSUPPORT: |
233 | return |
234 | "Network error: Address family not supported by protocol family"; |
235 | case WSAEALREADY: |
236 | return "Network error: Operation already in progress"; |
237 | case WSAECONNABORTED: |
238 | return "Network error: Software caused connection abort"; |
239 | case WSAECONNREFUSED: |
240 | return "Network error: Connection refused"; |
241 | case WSAECONNRESET: |
242 | return "Network error: Connection reset by peer"; |
243 | case WSAEDESTADDRREQ: |
244 | return "Network error: Destination address required"; |
245 | case WSAEFAULT: |
246 | return "Network error: Bad address"; |
247 | case WSAEHOSTDOWN: |
248 | return "Network error: Host is down"; |
249 | case WSAEHOSTUNREACH: |
250 | return "Network error: No route to host"; |
251 | case WSAEINPROGRESS: |
252 | return "Network error: Operation now in progress"; |
253 | case WSAEINTR: |
254 | return "Network error: Interrupted function call"; |
255 | case WSAEINVAL: |
256 | return "Network error: Invalid argument"; |
257 | case WSAEISCONN: |
258 | return "Network error: Socket is already connected"; |
259 | case WSAEMFILE: |
260 | return "Network error: Too many open files"; |
261 | case WSAEMSGSIZE: |
262 | return "Network error: Message too long"; |
263 | case WSAENETDOWN: |
264 | return "Network error: Network is down"; |
265 | case WSAENETRESET: |
266 | return "Network error: Network dropped connection on reset"; |
267 | case WSAENETUNREACH: |
268 | return "Network error: Network is unreachable"; |
269 | case WSAENOBUFS: |
270 | return "Network error: No buffer space available"; |
271 | case WSAENOPROTOOPT: |
272 | return "Network error: Bad protocol option"; |
273 | case WSAENOTCONN: |
274 | return "Network error: Socket is not connected"; |
275 | case WSAENOTSOCK: |
276 | return "Network error: Socket operation on non-socket"; |
277 | case WSAEOPNOTSUPP: |
278 | return "Network error: Operation not supported"; |
279 | case WSAEPFNOSUPPORT: |
280 | return "Network error: Protocol family not supported"; |
281 | case WSAEPROCLIM: |
282 | return "Network error: Too many processes"; |
283 | case WSAEPROTONOSUPPORT: |
284 | return "Network error: Protocol not supported"; |
285 | case WSAEPROTOTYPE: |
286 | return "Network error: Protocol wrong type for socket"; |
287 | case WSAESHUTDOWN: |
288 | return "Network error: Cannot send after socket shutdown"; |
289 | case WSAESOCKTNOSUPPORT: |
290 | return "Network error: Socket type not supported"; |
291 | case WSAETIMEDOUT: |
292 | return "Network error: Connection timed out"; |
293 | case WSAEWOULDBLOCK: |
294 | return "Network error: Resource temporarily unavailable"; |
295 | case WSAEDISCON: |
296 | return "Network error: Graceful shutdown in progress"; |
297 | default: |
298 | return "Unknown network error"; |
e74fbad9 |
299 | } |
300 | } |
301 | |
05581745 |
302 | SockAddr sk_namelookup(const char *host, char **canonicalname, |
303 | int address_family) |
c4d8e107 |
304 | { |
3d88e64d |
305 | SockAddr ret = snew(struct SockAddr_tag); |
2f75bae1 |
306 | unsigned long a; |
c4d8e107 |
307 | struct hostent *h = NULL; |
6e1ebb76 |
308 | char realhost[8192]; |
38bd69cd |
309 | int ret_family; |
310 | int err; |
2f75bae1 |
311 | |
c4d8e107 |
312 | /* Clear the structure and default to IPv4. */ |
313 | memset(ret, 0, sizeof(struct SockAddr_tag)); |
05581745 |
314 | ret->family = (address_family == ADDRTYPE_IPV4 ? AF_INET : |
315 | #ifndef NO_IPV6 |
316 | address_family == ADDRTYPE_IPV6 ? AF_INET6 : |
317 | #endif |
318 | AF_UNSPEC); |
38bd69cd |
319 | ret_family = AF_UNSPEC; |
6e1ebb76 |
320 | *realhost = '\0'; |
c4d8e107 |
321 | |
7440fd44 |
322 | if ((a = p_inet_addr(host)) == (unsigned long) INADDR_NONE) { |
05581745 |
323 | #ifndef NO_IPV6 |
c4d8e107 |
324 | |
325 | /* Try to get the getaddrinfo() function from wship6.dll */ |
326 | /* This way one doesn't need to have IPv6 dll's to use PuTTY and |
327 | * it will fallback to IPv4. */ |
32874aea |
328 | typedef int (CALLBACK * FGETADDRINFO) (const char *nodename, |
329 | const char *servname, |
38bd69cd |
330 | const struct addrinfo *hints, |
331 | struct addrinfo **res); |
c4d8e107 |
332 | FGETADDRINFO fGetAddrInfo = NULL; |
333 | |
334 | HINSTANCE dllWSHIP6 = LoadLibrary("wship6.dll"); |
335 | if (dllWSHIP6) |
32874aea |
336 | fGetAddrInfo = (FGETADDRINFO) GetProcAddress(dllWSHIP6, |
337 | "getaddrinfo"); |
c4d8e107 |
338 | |
339 | /* |
05581745 |
340 | * Use fGetAddrInfo when it's available |
c4d8e107 |
341 | */ |
32874aea |
342 | if (fGetAddrInfo) { |
38bd69cd |
343 | struct addrinfo hints; |
344 | memset(&hints, 0, sizeof(hints)); |
345 | hints.ai_family = ret->family; |
346 | if ((err = fGetAddrInfo(host, NULL, &hints, &ret->ai)) == 0) |
347 | ret_family = ret->ai->ai_family; |
32874aea |
348 | } else |
c4d8e107 |
349 | #endif |
32874aea |
350 | { |
c4d8e107 |
351 | /* |
352 | * Otherwise use the IPv4-only gethostbyname... |
05581745 |
353 | * (NOTE: we don't use gethostbyname as a fallback!) |
c4d8e107 |
354 | */ |
38bd69cd |
355 | if ( (h = p_gethostbyname(host)) ) |
356 | ret_family = AF_INET; |
357 | else |
358 | err = p_WSAGetLastError(); |
c4d8e107 |
359 | } |
c4d8e107 |
360 | |
38bd69cd |
361 | if (ret_family == AF_UNSPEC) { |
c4d8e107 |
362 | ret->error = (err == WSAENETDOWN ? "Network is down" : |
38bd69cd |
363 | err == WSAHOST_NOT_FOUND ? "Host does not exist" : |
364 | err == WSATRY_AGAIN ? "Host not found" : |
05581745 |
365 | #ifndef NO_IPV6 |
c4d8e107 |
366 | fGetAddrInfo ? "getaddrinfo: unknown error" : |
367 | #endif |
368 | "gethostbyname: unknown error"); |
32874aea |
369 | } else { |
c4d8e107 |
370 | ret->error = NULL; |
38bd69cd |
371 | ret->family = ret_family; |
c4d8e107 |
372 | |
05581745 |
373 | #ifndef NO_IPV6 |
c4d8e107 |
374 | /* If we got an address info use that... */ |
32874aea |
375 | if (ret->ai) { |
376 | typedef int (CALLBACK * FGETNAMEINFO) |
377 | (const struct sockaddr FAR * sa, socklen_t salen, |
378 | char FAR * host, size_t hostlen, char FAR * serv, |
379 | size_t servlen, int flags); |
c4d8e107 |
380 | FGETNAMEINFO fGetNameInfo = NULL; |
381 | |
382 | /* Are we in IPv4 fallback mode? */ |
383 | /* We put the IPv4 address into the a variable so we can further-on use the IPv4 code... */ |
384 | if (ret->family == AF_INET) |
32874aea |
385 | memcpy(&a, |
386 | (char *) &((SOCKADDR_IN *) ret->ai-> |
387 | ai_addr)->sin_addr, sizeof(a)); |
c4d8e107 |
388 | |
389 | /* Now let's find that canonicalname... */ |
32874aea |
390 | if ((dllWSHIP6) |
391 | && (fGetNameInfo = |
392 | (FGETNAMEINFO) GetProcAddress(dllWSHIP6, |
393 | "getnameinfo"))) { |
394 | if (fGetNameInfo |
395 | ((struct sockaddr *) ret->ai->ai_addr, |
396 | ret->family == |
397 | AF_INET ? sizeof(SOCKADDR_IN) : |
6e1ebb76 |
398 | sizeof(SOCKADDR_IN6), realhost, |
399 | sizeof(realhost), NULL, 0, 0) != 0) { |
400 | strncpy(realhost, host, sizeof(realhost)); |
c4d8e107 |
401 | } |
402 | } |
403 | } |
404 | /* We used the IPv4-only gethostbyname()... */ |
405 | else |
c4d8e107 |
406 | #endif |
32874aea |
407 | { |
c4d8e107 |
408 | memcpy(&a, h->h_addr, sizeof(a)); |
409 | /* This way we are always sure the h->h_name is valid :) */ |
6e1ebb76 |
410 | strncpy(realhost, h->h_name, sizeof(realhost)); |
c4d8e107 |
411 | } |
c4d8e107 |
412 | } |
05581745 |
413 | #ifndef NO_IPV6 |
c4d8e107 |
414 | FreeLibrary(dllWSHIP6); |
415 | #endif |
32874aea |
416 | } else { |
87ed061f |
417 | /* |
418 | * This must be a numeric IPv4 address because it caused a |
419 | * success return from inet_addr. |
420 | */ |
32874aea |
421 | ret->family = AF_INET; |
6e1ebb76 |
422 | strncpy(realhost, host, sizeof(realhost)); |
2f75bae1 |
423 | } |
7440fd44 |
424 | ret->address = p_ntohl(a); |
6e1ebb76 |
425 | realhost[lenof(realhost)-1] = '\0'; |
3d88e64d |
426 | *canonicalname = snewn(1+strlen(realhost), char); |
6e1ebb76 |
427 | strcpy(*canonicalname, realhost); |
2f75bae1 |
428 | return ret; |
429 | } |
430 | |
e8fa8f62 |
431 | SockAddr sk_nonamelookup(const char *host) |
b7a189f3 |
432 | { |
3d88e64d |
433 | SockAddr ret = snew(struct SockAddr_tag); |
ab0873ab |
434 | ret->error = NULL; |
b7a189f3 |
435 | ret->family = AF_UNSPEC; |
436 | strncpy(ret->hostname, host, lenof(ret->hostname)); |
437 | ret->hostname[lenof(ret->hostname)-1] = '\0'; |
438 | return ret; |
439 | } |
440 | |
3ad9d396 |
441 | void sk_getaddr(SockAddr addr, char *buf, int buflen) |
442 | { |
05581745 |
443 | #ifndef NO_IPV6 |
b7a189f3 |
444 | if (addr->family == AF_INET6) { |
05581745 |
445 | /* Try to get the WSAAddressToStringA() function from wship6.dll */ |
446 | /* This way one doesn't need to have IPv6 dll's to use PuTTY and |
447 | * it will fallback to IPv4. */ |
448 | typedef int (CALLBACK * FADDRTOSTR) (LPSOCKADDR lpsaAddress, |
449 | DWORD dwAddressLength, |
450 | LPWSAPROTOCOL_INFO lpProtocolInfo, |
451 | OUT LPTSTR lpszAddressString, |
452 | IN OUT LPDWORD lpdwAddressStringLength |
453 | ); |
454 | FADDRTOSTR fAddrToStr = NULL; |
455 | |
456 | HINSTANCE dllWS2 = LoadLibrary("ws2_32.dll"); |
457 | if (dllWS2) { |
458 | fAddrToStr = (FADDRTOSTR)GetProcAddress(dllWS2, |
459 | "WSAAddressToStringA"); |
460 | if (fAddrToStr) { |
461 | fAddrToStr(addr->ai->ai_addr, addr->ai->ai_addrlen, |
462 | NULL, buf, &buflen); |
463 | } |
464 | else strncpy(buf, "IPv6", buflen); |
465 | FreeLibrary(dllWS2); |
466 | } |
b7a189f3 |
467 | } else |
3ad9d396 |
468 | #endif |
b7a189f3 |
469 | if (addr->family == AF_INET) { |
3ad9d396 |
470 | struct in_addr a; |
7440fd44 |
471 | a.s_addr = p_htonl(addr->address); |
472 | strncpy(buf, p_inet_ntoa(a), buflen); |
b7a189f3 |
473 | buf[buflen-1] = '\0'; |
3ad9d396 |
474 | } else { |
b7a189f3 |
475 | strncpy(buf, addr->hostname, buflen); |
476 | buf[buflen-1] = '\0'; |
3ad9d396 |
477 | } |
3ad9d396 |
478 | } |
479 | |
b804e1e5 |
480 | int sk_hostname_is_local(char *name) |
481 | { |
482 | return !strcmp(name, "localhost"); |
483 | } |
484 | |
a143ea0a |
485 | static INTERFACE_INFO local_interfaces[16]; |
486 | static int n_local_interfaces; /* 0=not yet, -1=failed, >0=number */ |
487 | |
488 | static int ipv4_is_local_addr(struct in_addr addr) |
489 | { |
490 | if (ipv4_is_loopback(addr)) |
491 | return 1; /* loopback addresses are local */ |
492 | if (!n_local_interfaces) { |
493 | SOCKET s = p_socket(AF_INET, SOCK_DGRAM, 0); |
494 | DWORD retbytes; |
495 | |
496 | if (p_WSAIoctl && |
497 | p_WSAIoctl(s, SIO_GET_INTERFACE_LIST, NULL, 0, |
498 | local_interfaces, sizeof(local_interfaces), |
499 | &retbytes, NULL, NULL) == 0) |
500 | n_local_interfaces = retbytes / sizeof(INTERFACE_INFO); |
501 | else |
502 | logevent(NULL, "Unable to get list of local IP addresses"); |
503 | } |
504 | if (n_local_interfaces > 0) { |
505 | int i; |
506 | for (i = 0; i < n_local_interfaces; i++) { |
507 | SOCKADDR_IN *address = |
508 | (SOCKADDR_IN *)&local_interfaces[i].iiAddress; |
509 | if (address->sin_addr.s_addr == addr.s_addr) |
510 | return 1; /* this address is local */ |
511 | } |
512 | } |
513 | return 0; /* this address is not local */ |
514 | } |
515 | |
b804e1e5 |
516 | int sk_address_is_local(SockAddr addr) |
517 | { |
05581745 |
518 | #ifndef NO_IPV6 |
b7a189f3 |
519 | if (addr->family == AF_INET6) { |
05581745 |
520 | return IN6_IS_ADDR_LOOPBACK((const struct in6_addr *)addr->ai->ai_addr); |
b7a189f3 |
521 | } else |
b804e1e5 |
522 | #endif |
b7a189f3 |
523 | if (addr->family == AF_INET) { |
b804e1e5 |
524 | struct in_addr a; |
7440fd44 |
525 | a.s_addr = p_htonl(addr->address); |
a143ea0a |
526 | return ipv4_is_local_addr(a); |
b804e1e5 |
527 | } else { |
b7a189f3 |
528 | assert(addr->family == AF_UNSPEC); |
529 | return 0; /* we don't know; assume not */ |
b804e1e5 |
530 | } |
b804e1e5 |
531 | } |
532 | |
6971bbe7 |
533 | int sk_addrtype(SockAddr addr) |
534 | { |
b7a189f3 |
535 | return (addr->family == AF_INET ? ADDRTYPE_IPV4 : |
05581745 |
536 | #ifndef NO_IPV6 |
b7a189f3 |
537 | addr->family == AF_INET6 ? ADDRTYPE_IPV6 : |
538 | #endif |
539 | ADDRTYPE_NAME); |
6971bbe7 |
540 | } |
541 | |
542 | void sk_addrcopy(SockAddr addr, char *buf) |
543 | { |
b7a189f3 |
544 | assert(addr->family != AF_UNSPEC); |
05581745 |
545 | #ifndef NO_IPV6 |
b7a189f3 |
546 | if (addr->family == AF_INET6) { |
547 | memcpy(buf, (char*) addr->ai, 16); |
548 | } else |
6971bbe7 |
549 | #endif |
b7a189f3 |
550 | if (addr->family == AF_INET) { |
6971bbe7 |
551 | struct in_addr a; |
7440fd44 |
552 | a.s_addr = p_htonl(addr->address); |
96d9eb89 |
553 | memcpy(buf, (char*) &a.s_addr, 4); |
6971bbe7 |
554 | } |
6971bbe7 |
555 | } |
556 | |
32874aea |
557 | void sk_addr_free(SockAddr addr) |
558 | { |
2f75bae1 |
559 | sfree(addr); |
560 | } |
561 | |
32874aea |
562 | static Plug sk_tcp_plug(Socket sock, Plug p) |
563 | { |
7e78000d |
564 | Actual_Socket s = (Actual_Socket) sock; |
565 | Plug ret = s->plug; |
32874aea |
566 | if (p) |
567 | s->plug = p; |
7e78000d |
568 | return ret; |
569 | } |
570 | |
32874aea |
571 | static void sk_tcp_flush(Socket s) |
572 | { |
7e78000d |
573 | /* |
574 | * We send data to the socket as soon as we can anyway, |
575 | * so we don't need to do anything here. :-) |
576 | */ |
577 | } |
578 | |
2d466ffd |
579 | static void sk_tcp_close(Socket s); |
e0e7dff8 |
580 | static int sk_tcp_write(Socket s, const char *data, int len); |
581 | static int sk_tcp_write_oob(Socket s, const char *data, int len); |
8eebd221 |
582 | static void sk_tcp_set_private_ptr(Socket s, void *ptr); |
583 | static void *sk_tcp_get_private_ptr(Socket s); |
584 | static void sk_tcp_set_frozen(Socket s, int is_frozen); |
cbe2d68f |
585 | static const char *sk_tcp_socket_error(Socket s); |
7e78000d |
586 | |
d74d141c |
587 | extern char *do_select(SOCKET skt, int startup); |
588 | |
589 | Socket sk_register(void *sock, Plug plug) |
590 | { |
c85623f9 |
591 | static const struct socket_function_table fn_table = { |
d74d141c |
592 | sk_tcp_plug, |
593 | sk_tcp_close, |
594 | sk_tcp_write, |
595 | sk_tcp_write_oob, |
596 | sk_tcp_flush, |
8eebd221 |
597 | sk_tcp_set_private_ptr, |
598 | sk_tcp_get_private_ptr, |
599 | sk_tcp_set_frozen, |
d74d141c |
600 | sk_tcp_socket_error |
601 | }; |
602 | |
603 | DWORD err; |
604 | char *errstr; |
605 | Actual_Socket ret; |
606 | |
607 | /* |
608 | * Create Socket structure. |
609 | */ |
3d88e64d |
610 | ret = snew(struct Socket_tag); |
d74d141c |
611 | ret->fn = &fn_table; |
612 | ret->error = NULL; |
613 | ret->plug = plug; |
5471d09a |
614 | bufchain_init(&ret->output_data); |
d74d141c |
615 | ret->writable = 1; /* to start with */ |
616 | ret->sending_oob = 0; |
617 | ret->frozen = 1; |
5471d09a |
618 | ret->frozen_readable = 0; |
bc4802a1 |
619 | ret->localhost_only = 0; /* unused, but best init anyway */ |
7732d38a |
620 | ret->pending_error = 0; |
d74d141c |
621 | |
622 | ret->s = (SOCKET)sock; |
623 | |
624 | if (ret->s == INVALID_SOCKET) { |
7440fd44 |
625 | err = p_WSAGetLastError(); |
d74d141c |
626 | ret->error = winsock_error_string(err); |
627 | return (Socket) ret; |
628 | } |
629 | |
630 | ret->oobinline = 0; |
631 | |
632 | /* Set up a select mechanism. This could be an AsyncSelect on a |
633 | * window, or an EventSelect on an event object. */ |
634 | errstr = do_select(ret->s, 1); |
635 | if (errstr) { |
636 | ret->error = errstr; |
637 | return (Socket) ret; |
638 | } |
639 | |
640 | add234(sktree, ret); |
641 | |
642 | return (Socket) ret; |
643 | } |
644 | |
4b1e8acc |
645 | Socket sk_new(SockAddr addr, int port, int privport, int oobinline, |
79bf227b |
646 | int nodelay, int keepalive, Plug plug) |
7e78000d |
647 | { |
c85623f9 |
648 | static const struct socket_function_table fn_table = { |
7e78000d |
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, |
7e78000d |
657 | sk_tcp_socket_error |
658 | }; |
659 | |
2f75bae1 |
660 | SOCKET s; |
05581745 |
661 | #ifndef NO_IPV6 |
c4d8e107 |
662 | SOCKADDR_IN6 a6; |
663 | #endif |
2f75bae1 |
664 | SOCKADDR_IN a; |
665 | DWORD err; |
666 | char *errstr; |
7e78000d |
667 | Actual_Socket ret; |
c91409da |
668 | short localport; |
2f75bae1 |
669 | |
670 | /* |
671 | * Create Socket structure. |
672 | */ |
3d88e64d |
673 | ret = snew(struct Socket_tag); |
7e78000d |
674 | ret->fn = &fn_table; |
2f75bae1 |
675 | ret->error = NULL; |
7e78000d |
676 | ret->plug = plug; |
5471d09a |
677 | bufchain_init(&ret->output_data); |
3ad9d396 |
678 | ret->connected = 0; /* to start with */ |
679 | ret->writable = 0; /* to start with */ |
33232c8f |
680 | ret->sending_oob = 0; |
d74d141c |
681 | ret->frozen = 0; |
5471d09a |
682 | ret->frozen_readable = 0; |
bc4802a1 |
683 | ret->localhost_only = 0; /* unused, but best init anyway */ |
7732d38a |
684 | ret->pending_error = 0; |
2f75bae1 |
685 | |
686 | /* |
687 | * Open socket. |
688 | */ |
05581745 |
689 | #ifndef NO_IPV6 |
690 | /* Let's default to IPv6, this shouldn't hurt anybody |
691 | * If the stack supports IPv6 it will also allow IPv4 connections. */ |
692 | if (addr->family == AF_UNSPEC) addr->family = AF_INET6; |
693 | #else |
694 | /* No other choice, default to IPv4 */ |
695 | if (addr->family == AF_UNSPEC) addr->family = AF_INET; |
696 | #endif |
7440fd44 |
697 | s = p_socket(addr->family, SOCK_STREAM, 0); |
2f75bae1 |
698 | ret->s = s; |
699 | |
700 | if (s == INVALID_SOCKET) { |
7440fd44 |
701 | err = p_WSAGetLastError(); |
32874aea |
702 | ret->error = winsock_error_string(err); |
7e78000d |
703 | return (Socket) ret; |
2f75bae1 |
704 | } |
4b1e8acc |
705 | |
706 | ret->oobinline = oobinline; |
707 | if (oobinline) { |
1ad4eb6f |
708 | BOOL b = TRUE; |
7440fd44 |
709 | p_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (void *) &b, sizeof(b)); |
1ad4eb6f |
710 | } |
2f75bae1 |
711 | |
2184a5d9 |
712 | if (nodelay) { |
713 | BOOL b = TRUE; |
7440fd44 |
714 | p_setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (void *) &b, sizeof(b)); |
2184a5d9 |
715 | } |
716 | |
79bf227b |
717 | if (keepalive) { |
718 | BOOL b = TRUE; |
719 | p_setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *) &b, sizeof(b)); |
720 | } |
721 | |
2f75bae1 |
722 | /* |
723 | * Bind to local address. |
724 | */ |
c91409da |
725 | if (privport) |
32874aea |
726 | localport = 1023; /* count from 1023 downwards */ |
c4d8e107 |
727 | else |
32874aea |
728 | localport = 0; /* just use port 0 (ie winsock picks) */ |
c91409da |
729 | |
730 | /* Loop round trying to bind */ |
731 | while (1) { |
32874aea |
732 | int retcode; |
c91409da |
733 | |
05581745 |
734 | #ifndef NO_IPV6 |
32874aea |
735 | if (addr->family == AF_INET6) { |
736 | memset(&a6, 0, sizeof(a6)); |
737 | a6.sin6_family = AF_INET6; |
05581745 |
738 | /*a6.sin6_addr = in6addr_any; */ /* == 0 done by memset() */ |
7440fd44 |
739 | a6.sin6_port = p_htons(localport); |
32874aea |
740 | } else |
c4d8e107 |
741 | #endif |
32874aea |
742 | { |
743 | a.sin_family = AF_INET; |
7440fd44 |
744 | a.sin_addr.s_addr = p_htonl(INADDR_ANY); |
745 | a.sin_port = p_htons(localport); |
32874aea |
746 | } |
05581745 |
747 | #ifndef NO_IPV6 |
7440fd44 |
748 | retcode = p_bind(s, (addr->family == AF_INET6 ? |
32874aea |
749 | (struct sockaddr *) &a6 : |
750 | (struct sockaddr *) &a), |
751 | (addr->family == |
752 | AF_INET6 ? sizeof(a6) : sizeof(a))); |
c4d8e107 |
753 | #else |
7440fd44 |
754 | retcode = p_bind(s, (struct sockaddr *) &a, sizeof(a)); |
c4d8e107 |
755 | #endif |
32874aea |
756 | if (retcode != SOCKET_ERROR) { |
757 | err = 0; |
758 | break; /* done */ |
759 | } else { |
7440fd44 |
760 | err = p_WSAGetLastError(); |
32874aea |
761 | if (err != WSAEADDRINUSE) /* failed, for a bad reason */ |
762 | break; |
763 | } |
764 | |
765 | if (localport == 0) |
766 | break; /* we're only looping once */ |
767 | localport--; |
768 | if (localport == 0) |
769 | break; /* we might have got to the end */ |
c91409da |
770 | } |
771 | |
32874aea |
772 | if (err) { |
c4d8e107 |
773 | ret->error = winsock_error_string(err); |
7e78000d |
774 | return (Socket) ret; |
2f75bae1 |
775 | } |
776 | |
777 | /* |
778 | * Connect to remote address. |
779 | */ |
05581745 |
780 | #ifndef NO_IPV6 |
32874aea |
781 | if (addr->family == AF_INET6) { |
782 | memset(&a, 0, sizeof(a)); |
c4d8e107 |
783 | a6.sin6_family = AF_INET6; |
7440fd44 |
784 | a6.sin6_port = p_htons((short) port); |
32874aea |
785 | a6.sin6_addr = |
786 | ((struct sockaddr_in6 *) addr->ai->ai_addr)->sin6_addr; |
787 | } else |
c4d8e107 |
788 | #endif |
32874aea |
789 | { |
c4d8e107 |
790 | a.sin_family = AF_INET; |
7440fd44 |
791 | a.sin_addr.s_addr = p_htonl(addr->address); |
792 | a.sin_port = p_htons((short) port); |
c4d8e107 |
793 | } |
3ad9d396 |
794 | |
795 | /* Set up a select mechanism. This could be an AsyncSelect on a |
796 | * window, or an EventSelect on an event object. */ |
797 | errstr = do_select(s, 1); |
798 | if (errstr) { |
799 | ret->error = errstr; |
800 | return (Socket) ret; |
801 | } |
802 | |
32874aea |
803 | if (( |
05581745 |
804 | #ifndef NO_IPV6 |
7440fd44 |
805 | p_connect(s, ((addr->family == AF_INET6) ? |
32874aea |
806 | (struct sockaddr *) &a6 : (struct sockaddr *) &a), |
807 | (addr->family == AF_INET6) ? sizeof(a6) : sizeof(a)) |
c4d8e107 |
808 | #else |
7440fd44 |
809 | p_connect(s, (struct sockaddr *) &a, sizeof(a)) |
c4d8e107 |
810 | #endif |
32874aea |
811 | ) == SOCKET_ERROR) { |
7440fd44 |
812 | err = p_WSAGetLastError(); |
3ad9d396 |
813 | /* |
814 | * We expect a potential EWOULDBLOCK here, because the |
815 | * chances are the front end has done a select for |
816 | * FD_CONNECT, so that connect() will complete |
817 | * asynchronously. |
818 | */ |
819 | if ( err != WSAEWOULDBLOCK ) { |
820 | ret->error = winsock_error_string(err); |
821 | return (Socket) ret; |
822 | } |
823 | } else { |
824 | /* |
825 | * If we _don't_ get EWOULDBLOCK, the connect has completed |
826 | * and we should set the socket as writable. |
827 | */ |
828 | ret->writable = 1; |
2f75bae1 |
829 | } |
830 | |
831 | add234(sktree, ret); |
832 | |
f85e6f6e |
833 | /* We're done with 'addr' now. */ |
834 | sk_addr_free(addr); |
835 | |
7e78000d |
836 | return (Socket) ret; |
2f75bae1 |
837 | } |
838 | |
05581745 |
839 | Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only, |
840 | int address_family) |
d74d141c |
841 | { |
c85623f9 |
842 | static const struct socket_function_table fn_table = { |
d74d141c |
843 | sk_tcp_plug, |
844 | sk_tcp_close, |
845 | sk_tcp_write, |
846 | sk_tcp_write_oob, |
847 | sk_tcp_flush, |
8eebd221 |
848 | sk_tcp_set_private_ptr, |
849 | sk_tcp_get_private_ptr, |
850 | sk_tcp_set_frozen, |
d74d141c |
851 | sk_tcp_socket_error |
852 | }; |
853 | |
854 | SOCKET s; |
05581745 |
855 | #ifndef NO_IPV6 |
d74d141c |
856 | SOCKADDR_IN6 a6; |
857 | #endif |
858 | SOCKADDR_IN a; |
05581745 |
859 | |
d74d141c |
860 | DWORD err; |
861 | char *errstr; |
862 | Actual_Socket ret; |
863 | int retcode; |
864 | int on = 1; |
865 | |
866 | /* |
867 | * Create Socket structure. |
868 | */ |
3d88e64d |
869 | ret = snew(struct Socket_tag); |
d74d141c |
870 | ret->fn = &fn_table; |
871 | ret->error = NULL; |
872 | ret->plug = plug; |
5471d09a |
873 | bufchain_init(&ret->output_data); |
d74d141c |
874 | ret->writable = 0; /* to start with */ |
875 | ret->sending_oob = 0; |
876 | ret->frozen = 0; |
5471d09a |
877 | ret->frozen_readable = 0; |
bc4802a1 |
878 | ret->localhost_only = local_host_only; |
7732d38a |
879 | ret->pending_error = 0; |
d74d141c |
880 | |
881 | /* |
05581745 |
882 | * Translate address_family from platform-independent constants |
883 | * into local reality. |
884 | */ |
885 | address_family = (address_family == ADDRTYPE_IPV4 ? AF_INET : |
886 | #ifndef NO_IPV6 |
887 | address_family == ADDRTYPE_IPV6 ? AF_INET6 : |
888 | #endif |
889 | AF_UNSPEC); |
890 | |
891 | #ifndef NO_IPV6 |
892 | /* Let's default to IPv6, this shouldn't hurt anybody |
893 | * If the stack supports IPv6 it will also allow IPv4 connections. */ |
894 | if (address_family == AF_UNSPEC) address_family = AF_INET6; |
895 | #else |
896 | /* No other choice, default to IPv4 */ |
897 | if (address_family == AF_UNSPEC) address_family = AF_INET; |
898 | #endif |
899 | |
900 | /* |
d74d141c |
901 | * Open socket. |
902 | */ |
05581745 |
903 | s = p_socket(address_family, SOCK_STREAM, 0); |
d74d141c |
904 | ret->s = s; |
905 | |
906 | if (s == INVALID_SOCKET) { |
7440fd44 |
907 | err = p_WSAGetLastError(); |
d74d141c |
908 | ret->error = winsock_error_string(err); |
909 | return (Socket) ret; |
910 | } |
911 | |
912 | ret->oobinline = 0; |
913 | |
7440fd44 |
914 | p_setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *)&on, sizeof(on)); |
d74d141c |
915 | |
05581745 |
916 | #ifndef NO_IPV6 |
917 | if (address_family == AF_INET6) { |
d74d141c |
918 | memset(&a6, 0, sizeof(a6)); |
919 | a6.sin6_family = AF_INET6; |
6ee9b735 |
920 | /* FIXME: srcaddr is ignored for IPv6, because I (SGT) don't |
05581745 |
921 | * know how to do it. :-) |
922 | * (jeroen:) saddr is specified as an address.. eg 2001:db8::1 |
923 | * Thus we need either a parser that understands [2001:db8::1]:80 |
924 | * style addresses and/or enhance this to understand hostnames too. */ |
bcce45ed |
925 | if (local_host_only) |
926 | a6.sin6_addr = in6addr_loopback; |
927 | else |
928 | a6.sin6_addr = in6addr_any; |
7440fd44 |
929 | a6.sin6_port = p_htons(port); |
d74d141c |
930 | } else |
931 | #endif |
932 | { |
6ee9b735 |
933 | int got_addr = 0; |
d74d141c |
934 | a.sin_family = AF_INET; |
6ee9b735 |
935 | |
936 | /* |
937 | * Bind to source address. First try an explicitly |
938 | * specified one... |
939 | */ |
940 | if (srcaddr) { |
7440fd44 |
941 | a.sin_addr.s_addr = p_inet_addr(srcaddr); |
6ee9b735 |
942 | if (a.sin_addr.s_addr != INADDR_NONE) { |
943 | /* Override localhost_only with specified listen addr. */ |
944 | ret->localhost_only = ipv4_is_loopback(a.sin_addr); |
945 | got_addr = 1; |
946 | } |
947 | } |
948 | |
949 | /* |
950 | * ... and failing that, go with one of the standard ones. |
951 | */ |
952 | if (!got_addr) { |
953 | if (local_host_only) |
7440fd44 |
954 | a.sin_addr.s_addr = p_htonl(INADDR_LOOPBACK); |
6ee9b735 |
955 | else |
7440fd44 |
956 | a.sin_addr.s_addr = p_htonl(INADDR_ANY); |
6ee9b735 |
957 | } |
958 | |
7440fd44 |
959 | a.sin_port = p_htons((short)port); |
d74d141c |
960 | } |
05581745 |
961 | #ifndef NO_IPV6 |
962 | retcode = p_bind(s, (address_family == AF_INET6 ? |
d74d141c |
963 | (struct sockaddr *) &a6 : |
964 | (struct sockaddr *) &a), |
05581745 |
965 | (address_family == |
d74d141c |
966 | AF_INET6 ? sizeof(a6) : sizeof(a))); |
967 | #else |
7440fd44 |
968 | retcode = p_bind(s, (struct sockaddr *) &a, sizeof(a)); |
d74d141c |
969 | #endif |
970 | if (retcode != SOCKET_ERROR) { |
971 | err = 0; |
972 | } else { |
7440fd44 |
973 | err = p_WSAGetLastError(); |
d74d141c |
974 | } |
975 | |
976 | if (err) { |
977 | ret->error = winsock_error_string(err); |
978 | return (Socket) ret; |
979 | } |
980 | |
981 | |
7440fd44 |
982 | if (p_listen(s, SOMAXCONN) == SOCKET_ERROR) { |
983 | p_closesocket(s); |
d74d141c |
984 | ret->error = winsock_error_string(err); |
985 | return (Socket) ret; |
986 | } |
987 | |
988 | /* Set up a select mechanism. This could be an AsyncSelect on a |
989 | * window, or an EventSelect on an event object. */ |
990 | errstr = do_select(s, 1); |
991 | if (errstr) { |
992 | ret->error = errstr; |
993 | return (Socket) ret; |
994 | } |
995 | |
996 | add234(sktree, ret); |
997 | |
998 | return (Socket) ret; |
999 | } |
1000 | |
32874aea |
1001 | static void sk_tcp_close(Socket sock) |
1002 | { |
9c964e85 |
1003 | extern char *do_select(SOCKET skt, int startup); |
7e78000d |
1004 | Actual_Socket s = (Actual_Socket) sock; |
9c964e85 |
1005 | |
2f75bae1 |
1006 | del234(sktree, s); |
1007 | do_select(s->s, 0); |
7440fd44 |
1008 | p_closesocket(s->s); |
dcbde236 |
1009 | sfree(s); |
2f75bae1 |
1010 | } |
1011 | |
2f75bae1 |
1012 | /* |
1013 | * The function which tries to send on a socket once it's deemed |
1014 | * writable. |
1015 | */ |
32874aea |
1016 | void try_send(Actual_Socket s) |
1017 | { |
5471d09a |
1018 | while (s->sending_oob || bufchain_size(&s->output_data) > 0) { |
2f75bae1 |
1019 | int nsent; |
1020 | DWORD err; |
5471d09a |
1021 | void *data; |
32874aea |
1022 | int len, urgentflag; |
1023 | |
1024 | if (s->sending_oob) { |
1025 | urgentflag = MSG_OOB; |
1026 | len = s->sending_oob; |
5471d09a |
1027 | data = &s->oobdata; |
32874aea |
1028 | } else { |
1029 | urgentflag = 0; |
5471d09a |
1030 | bufchain_prefix(&s->output_data, &data, &len); |
32874aea |
1031 | } |
7440fd44 |
1032 | nsent = p_send(s->s, data, len, urgentflag); |
32874aea |
1033 | noise_ultralight(nsent); |
2f75bae1 |
1034 | if (nsent <= 0) { |
7440fd44 |
1035 | err = (nsent < 0 ? p_WSAGetLastError() : 0); |
e5eb3a1c |
1036 | if ((err < WSABASEERR && nsent < 0) || err == WSAEWOULDBLOCK) { |
d40a94b9 |
1037 | /* |
1038 | * Perfectly normal: we've sent all we can for the moment. |
1039 | * |
e5eb3a1c |
1040 | * (Some WinSock send() implementations can return |
1041 | * <0 but leave no sensible error indication - |
1042 | * WSAGetLastError() is called but returns zero or |
1043 | * a small number - so we check that case and treat |
1044 | * it just like WSAEWOULDBLOCK.) |
d40a94b9 |
1045 | */ |
2f75bae1 |
1046 | s->writable = FALSE; |
32874aea |
1047 | return; |
2f75bae1 |
1048 | } else if (nsent == 0 || |
32874aea |
1049 | err == WSAECONNABORTED || err == WSAECONNRESET) { |
1050 | /* |
7732d38a |
1051 | * If send() returns CONNABORTED or CONNRESET, we |
1052 | * unfortunately can't just call plug_closing(), |
1053 | * because it's quite likely that we're currently |
1054 | * _in_ a call from the code we'd be calling back |
1055 | * to, so we'd have to make half the SSH code |
1056 | * reentrant. Instead we flag a pending error on |
1057 | * the socket, to be dealt with (by calling |
1058 | * plug_closing()) at some suitable future moment. |
32874aea |
1059 | */ |
7732d38a |
1060 | s->pending_error = err; |
1061 | return; |
2f75bae1 |
1062 | } else { |
a8327734 |
1063 | /* We're inside the Windows frontend here, so we know |
1064 | * that the frontend handle is unnecessary. */ |
1065 | logevent(NULL, winsock_error_string(err)); |
247308b5 |
1066 | fatalbox("%s", winsock_error_string(err)); |
2f75bae1 |
1067 | } |
1068 | } else { |
5471d09a |
1069 | if (s->sending_oob) { |
1070 | if (nsent < len) { |
1071 | memmove(s->oobdata, s->oobdata+nsent, len-nsent); |
1072 | s->sending_oob = len - nsent; |
1073 | } else { |
1074 | s->sending_oob = 0; |
1075 | } |
1076 | } else { |
1077 | bufchain_consume(&s->output_data, nsent); |
2f75bae1 |
1078 | } |
1079 | } |
1080 | } |
1081 | } |
1082 | |
e0e7dff8 |
1083 | static int sk_tcp_write(Socket sock, const char *buf, int len) |
32874aea |
1084 | { |
7e78000d |
1085 | Actual_Socket s = (Actual_Socket) sock; |
1086 | |
2f75bae1 |
1087 | /* |
1088 | * Add the data to the buffer list on the socket. |
1089 | */ |
5471d09a |
1090 | bufchain_add(&s->output_data, buf, len); |
2f75bae1 |
1091 | |
1092 | /* |
1093 | * Now try sending from the start of the buffer list. |
1094 | */ |
1095 | if (s->writable) |
1096 | try_send(s); |
5471d09a |
1097 | |
1098 | return bufchain_size(&s->output_data); |
2f75bae1 |
1099 | } |
1100 | |
e0e7dff8 |
1101 | static int sk_tcp_write_oob(Socket sock, const char *buf, int len) |
32874aea |
1102 | { |
7e78000d |
1103 | Actual_Socket s = (Actual_Socket) sock; |
1104 | |
2f75bae1 |
1105 | /* |
1106 | * Replace the buffer list on the socket with the data. |
1107 | */ |
5471d09a |
1108 | bufchain_clear(&s->output_data); |
1109 | assert(len <= sizeof(s->oobdata)); |
1110 | memcpy(s->oobdata, buf, len); |
2f75bae1 |
1111 | s->sending_oob = len; |
1112 | |
1113 | /* |
1114 | * Now try sending from the start of the buffer list. |
1115 | */ |
1116 | if (s->writable) |
1117 | try_send(s); |
5471d09a |
1118 | |
1119 | return s->sending_oob; |
2f75bae1 |
1120 | } |
1121 | |
32874aea |
1122 | int select_result(WPARAM wParam, LPARAM lParam) |
1123 | { |
f9d3f227 |
1124 | int ret, open; |
2f75bae1 |
1125 | DWORD err; |
b675c612 |
1126 | char buf[20480]; /* nice big buffer for plenty of speed */ |
7e78000d |
1127 | Actual_Socket s; |
49bad831 |
1128 | u_long atmark; |
2f75bae1 |
1129 | |
1130 | /* wParam is the socket itself */ |
cc8b0ee9 |
1131 | |
ce6fcfa5 |
1132 | if (wParam == 0) |
1133 | return 1; /* boggle */ |
cc8b0ee9 |
1134 | |
32874aea |
1135 | s = find234(sktree, (void *) wParam, cmpforsearch); |
2f75bae1 |
1136 | if (!s) |
1137 | return 1; /* boggle */ |
1138 | |
1139 | if ((err = WSAGETSELECTERROR(lParam)) != 0) { |
32874aea |
1140 | /* |
1141 | * An error has occurred on this socket. Pass it to the |
1142 | * plug. |
1143 | */ |
1144 | return plug_closing(s->plug, winsock_error_string(err), err, 0); |
2f75bae1 |
1145 | } |
1146 | |
7d6ee6ff |
1147 | noise_ultralight(lParam); |
1148 | |
2f75bae1 |
1149 | switch (WSAGETSELECTEVENT(lParam)) { |
3ad9d396 |
1150 | case FD_CONNECT: |
1151 | s->connected = s->writable = 1; |
1152 | break; |
2f75bae1 |
1153 | case FD_READ: |
d74d141c |
1154 | /* In the case the socket is still frozen, we don't even bother */ |
5471d09a |
1155 | if (s->frozen) { |
1156 | s->frozen_readable = 1; |
d74d141c |
1157 | break; |
5471d09a |
1158 | } |
d74d141c |
1159 | |
32874aea |
1160 | /* |
1161 | * We have received data on the socket. For an oobinline |
1162 | * socket, this might be data _before_ an urgent pointer, |
1163 | * in which case we send it to the back end with type==1 |
1164 | * (data prior to urgent). |
1165 | */ |
1166 | if (s->oobinline) { |
1167 | atmark = 1; |
7440fd44 |
1168 | p_ioctlsocket(s->s, SIOCATMARK, &atmark); |
32874aea |
1169 | /* |
1170 | * Avoid checking the return value from ioctlsocket(), |
1171 | * on the grounds that some WinSock wrappers don't |
1172 | * support it. If it does nothing, we get atmark==1, |
1173 | * which is equivalent to `no OOB pending', so the |
1174 | * effect will be to non-OOB-ify any OOB data. |
1175 | */ |
1176 | } else |
1177 | atmark = 1; |
4b1e8acc |
1178 | |
7440fd44 |
1179 | ret = p_recv(s->s, buf, sizeof(buf), 0); |
32874aea |
1180 | noise_ultralight(ret); |
2f75bae1 |
1181 | if (ret < 0) { |
7440fd44 |
1182 | err = p_WSAGetLastError(); |
2f75bae1 |
1183 | if (err == WSAEWOULDBLOCK) { |
1184 | break; |
1185 | } |
1186 | } |
1187 | if (ret < 0) { |
32874aea |
1188 | return plug_closing(s->plug, winsock_error_string(err), err, |
1189 | 0); |
7e78000d |
1190 | } else if (0 == ret) { |
32874aea |
1191 | return plug_closing(s->plug, NULL, 0, 0); |
2f75bae1 |
1192 | } else { |
32874aea |
1193 | return plug_receive(s->plug, atmark ? 0 : 1, buf, ret); |
2f75bae1 |
1194 | } |
1195 | break; |
1196 | case FD_OOB: |
32874aea |
1197 | /* |
1198 | * This will only happen on a non-oobinline socket. It |
1199 | * indicates that we can immediately perform an OOB read |
1200 | * and get back OOB data, which we will send to the back |
1201 | * end with type==2 (urgent data). |
1202 | */ |
7440fd44 |
1203 | ret = p_recv(s->s, buf, sizeof(buf), MSG_OOB); |
32874aea |
1204 | noise_ultralight(ret); |
1205 | if (ret <= 0) { |
247308b5 |
1206 | char *str = (ret == 0 ? "Internal networking trouble" : |
7440fd44 |
1207 | winsock_error_string(p_WSAGetLastError())); |
a8327734 |
1208 | /* We're inside the Windows frontend here, so we know |
1209 | * that the frontend handle is unnecessary. */ |
1210 | logevent(NULL, str); |
247308b5 |
1211 | fatalbox("%s", str); |
32874aea |
1212 | } else { |
1213 | return plug_receive(s->plug, 2, buf, ret); |
1214 | } |
1215 | break; |
2f75bae1 |
1216 | case FD_WRITE: |
5471d09a |
1217 | { |
1218 | int bufsize_before, bufsize_after; |
1219 | s->writable = 1; |
1220 | bufsize_before = s->sending_oob + bufchain_size(&s->output_data); |
1221 | try_send(s); |
1222 | bufsize_after = s->sending_oob + bufchain_size(&s->output_data); |
1223 | if (bufsize_after < bufsize_before) |
1224 | plug_sent(s->plug, bufsize_after); |
1225 | } |
2f75bae1 |
1226 | break; |
1227 | case FD_CLOSE: |
f9d3f227 |
1228 | /* Signal a close on the socket. First read any outstanding data. */ |
32874aea |
1229 | open = 1; |
1230 | do { |
7440fd44 |
1231 | ret = p_recv(s->s, buf, sizeof(buf), 0); |
32874aea |
1232 | if (ret < 0) { |
7440fd44 |
1233 | err = p_WSAGetLastError(); |
32874aea |
1234 | if (err == WSAEWOULDBLOCK) |
1235 | break; |
1236 | return plug_closing(s->plug, winsock_error_string(err), |
1237 | err, 0); |
1238 | } else { |
1239 | if (ret) |
1240 | open &= plug_receive(s->plug, 0, buf, ret); |
1241 | else |
1242 | open &= plug_closing(s->plug, NULL, 0, 0); |
7e78000d |
1243 | } |
f9d3f227 |
1244 | } while (ret > 0); |
32874aea |
1245 | return open; |
d74d141c |
1246 | case FD_ACCEPT: |
1247 | { |
05581745 |
1248 | #ifdef NO_IPV6 |
bc4802a1 |
1249 | struct sockaddr_in isa; |
05581745 |
1250 | #else |
1251 | struct sockaddr_storage isa; |
1252 | #endif |
1253 | int addrlen = sizeof(isa); |
bcce45ed |
1254 | SOCKET t; /* socket of connection */ |
1255 | |
05581745 |
1256 | memset(&isa, 0, sizeof(isa)); |
bcce45ed |
1257 | err = 0; |
7440fd44 |
1258 | t = p_accept(s->s,(struct sockaddr *)&isa,&addrlen); |
bcce45ed |
1259 | if (t == INVALID_SOCKET) |
1260 | { |
7440fd44 |
1261 | err = p_WSAGetLastError(); |
bcce45ed |
1262 | if (err == WSATRY_AGAIN) |
1263 | break; |
1264 | } |
05581745 |
1265 | #ifndef NO_IPV6 |
1266 | if (isa.ss_family == AF_INET && |
1267 | s->localhost_only && |
1268 | !ipv4_is_local_addr(((struct sockaddr_in *)&isa)->sin_addr)) { |
1269 | #else |
a143ea0a |
1270 | if (s->localhost_only && !ipv4_is_local_addr(isa.sin_addr)) { |
05581745 |
1271 | #endif |
7440fd44 |
1272 | p_closesocket(t); /* dodgy WinSock let nonlocal through */ |
bc4802a1 |
1273 | } else if (plug_accepting(s->plug, (void*)t)) { |
7440fd44 |
1274 | p_closesocket(t); /* denied or error */ |
bcce45ed |
1275 | } |
d74d141c |
1276 | } |
2f75bae1 |
1277 | } |
1278 | |
1279 | return 1; |
1280 | } |
1281 | |
1282 | /* |
7732d38a |
1283 | * Deal with socket errors detected in try_send(). |
1284 | */ |
1285 | void net_pending_errors(void) |
1286 | { |
1287 | int i; |
1288 | Actual_Socket s; |
1289 | |
1290 | /* |
1291 | * This might be a fiddly business, because it's just possible |
1292 | * that handling a pending error on one socket might cause |
1293 | * others to be closed. (I can't think of any reason this might |
1294 | * happen in current SSH implementation, but to maintain |
1295 | * generality of this network layer I'll assume the worst.) |
1296 | * |
1297 | * So what we'll do is search the socket list for _one_ socket |
1298 | * with a pending error, and then handle it, and then search |
1299 | * the list again _from the beginning_. Repeat until we make a |
1300 | * pass with no socket errors present. That way we are |
1301 | * protected against the socket list changing under our feet. |
1302 | */ |
1303 | |
1304 | do { |
1305 | for (i = 0; (s = index234(sktree, i)) != NULL; i++) { |
1306 | if (s->pending_error) { |
1307 | /* |
1308 | * An error has occurred on this socket. Pass it to the |
1309 | * plug. |
1310 | */ |
1311 | plug_closing(s->plug, |
1312 | winsock_error_string(s->pending_error), |
1313 | s->pending_error, 0); |
1314 | break; |
1315 | } |
1316 | } |
1317 | } while (s); |
1318 | } |
1319 | |
1320 | /* |
2f75bae1 |
1321 | * Each socket abstraction contains a `void *' private field in |
1322 | * which the client can keep state. |
1323 | */ |
8eebd221 |
1324 | static void sk_tcp_set_private_ptr(Socket sock, void *ptr) |
32874aea |
1325 | { |
7e78000d |
1326 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1327 | s->private_ptr = ptr; |
1328 | } |
32874aea |
1329 | |
8eebd221 |
1330 | static void *sk_tcp_get_private_ptr(Socket sock) |
32874aea |
1331 | { |
7e78000d |
1332 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1333 | return s->private_ptr; |
1334 | } |
1335 | |
1336 | /* |
1337 | * Special error values are returned from sk_namelookup and sk_new |
1338 | * if there's a problem. These functions extract an error message, |
1339 | * or return NULL if there's no problem. |
1340 | */ |
cbe2d68f |
1341 | const char *sk_addr_error(SockAddr addr) |
32874aea |
1342 | { |
2f75bae1 |
1343 | return addr->error; |
1344 | } |
cbe2d68f |
1345 | static const char *sk_tcp_socket_error(Socket sock) |
32874aea |
1346 | { |
7e78000d |
1347 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1348 | return s->error; |
1349 | } |
1350 | |
8eebd221 |
1351 | static void sk_tcp_set_frozen(Socket sock, int is_frozen) |
d74d141c |
1352 | { |
1353 | Actual_Socket s = (Actual_Socket) sock; |
5471d09a |
1354 | if (s->frozen == is_frozen) |
1355 | return; |
d74d141c |
1356 | s->frozen = is_frozen; |
5471d09a |
1357 | if (!is_frozen && s->frozen_readable) { |
d74d141c |
1358 | char c; |
7440fd44 |
1359 | p_recv(s->s, &c, 1, MSG_PEEK); |
d74d141c |
1360 | } |
5471d09a |
1361 | s->frozen_readable = 0; |
d74d141c |
1362 | } |
1363 | |
2f75bae1 |
1364 | /* |
1365 | * For Plink: enumerate all sockets currently active. |
1366 | */ |
32874aea |
1367 | SOCKET first_socket(int *state) |
1368 | { |
d2371c81 |
1369 | Actual_Socket s; |
1370 | *state = 0; |
1371 | s = index234(sktree, (*state)++); |
2f75bae1 |
1372 | return s ? s->s : INVALID_SOCKET; |
1373 | } |
32874aea |
1374 | |
1375 | SOCKET next_socket(int *state) |
1376 | { |
d2371c81 |
1377 | Actual_Socket s = index234(sktree, (*state)++); |
2f75bae1 |
1378 | return s ? s->s : INVALID_SOCKET; |
1379 | } |
68a49acb |
1380 | |
39934deb |
1381 | extern int socket_writable(SOCKET skt) |
1382 | { |
1383 | Actual_Socket s = find234(sktree, (void *)skt, cmpforsearch); |
1384 | |
1385 | if (s) |
1386 | return bufchain_size(&s->output_data) > 0; |
1387 | else |
1388 | return 0; |
1389 | } |
1390 | |
68a49acb |
1391 | int net_service_lookup(char *service) |
1392 | { |
1393 | struct servent *se; |
7440fd44 |
1394 | se = p_getservbyname(service, NULL); |
68a49acb |
1395 | if (se != NULL) |
7440fd44 |
1396 | return p_ntohs(se->s_port); |
68a49acb |
1397 | else |
1398 | return 0; |
1399 | } |
fc0f17db |
1400 | |
1401 | SockAddr platform_get_x11_unix_address(int displaynum, char **canonicalname) |
1402 | { |
1403 | SockAddr ret = snew(struct SockAddr_tag); |
1404 | memset(ret, 0, sizeof(struct SockAddr_tag)); |
1405 | ret->error = "unix sockets not supported on this platform"; |
1406 | return ret; |
1407 | } |