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]; |
2f75bae1 |
309 | |
c4d8e107 |
310 | /* Clear the structure and default to IPv4. */ |
311 | memset(ret, 0, sizeof(struct SockAddr_tag)); |
05581745 |
312 | ret->family = (address_family == ADDRTYPE_IPV4 ? AF_INET : |
313 | #ifndef NO_IPV6 |
314 | address_family == ADDRTYPE_IPV6 ? AF_INET6 : |
315 | #endif |
316 | AF_UNSPEC); |
6e1ebb76 |
317 | *realhost = '\0'; |
c4d8e107 |
318 | |
7440fd44 |
319 | if ((a = p_inet_addr(host)) == (unsigned long) INADDR_NONE) { |
05581745 |
320 | #ifndef NO_IPV6 |
c4d8e107 |
321 | |
322 | /* Try to get the getaddrinfo() function from wship6.dll */ |
323 | /* This way one doesn't need to have IPv6 dll's to use PuTTY and |
324 | * it will fallback to IPv4. */ |
32874aea |
325 | typedef int (CALLBACK * FGETADDRINFO) (const char *nodename, |
326 | const char *servname, |
327 | const struct addrinfo * |
328 | hints, |
329 | struct addrinfo ** res); |
c4d8e107 |
330 | FGETADDRINFO fGetAddrInfo = NULL; |
331 | |
332 | HINSTANCE dllWSHIP6 = LoadLibrary("wship6.dll"); |
333 | if (dllWSHIP6) |
32874aea |
334 | fGetAddrInfo = (FGETADDRINFO) GetProcAddress(dllWSHIP6, |
335 | "getaddrinfo"); |
c4d8e107 |
336 | |
337 | /* |
05581745 |
338 | * Use fGetAddrInfo when it's available |
c4d8e107 |
339 | */ |
32874aea |
340 | if (fGetAddrInfo) { |
05581745 |
341 | struct addrinfo hints; |
342 | memset(&hints, 0, sizeof(hints)); |
343 | hints.ai_family = ret->family; |
344 | if (fGetAddrInfo(host, NULL, &hints, &ret->ai) == 0) |
345 | ret->family = ret->ai->ai_family; |
32874aea |
346 | } else |
c4d8e107 |
347 | #endif |
32874aea |
348 | { |
c4d8e107 |
349 | /* |
350 | * Otherwise use the IPv4-only gethostbyname... |
05581745 |
351 | * (NOTE: we don't use gethostbyname as a fallback!) |
c4d8e107 |
352 | */ |
32874aea |
353 | if (ret->family == 0) { |
7440fd44 |
354 | if ( (h = p_gethostbyname(host)) ) |
32874aea |
355 | ret->family = AF_INET; |
356 | } |
c4d8e107 |
357 | } |
c4d8e107 |
358 | |
05581745 |
359 | if (ret->family == AF_UNSPEC) { |
7440fd44 |
360 | DWORD err = p_WSAGetLastError(); |
c4d8e107 |
361 | ret->error = (err == WSAENETDOWN ? "Network is down" : |
32874aea |
362 | err == |
363 | WSAHOST_NOT_FOUND ? "Host does not exist" : err |
364 | == 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; |
371 | |
05581745 |
372 | #ifndef NO_IPV6 |
c4d8e107 |
373 | /* If we got an address info use that... */ |
32874aea |
374 | if (ret->ai) { |
375 | typedef int (CALLBACK * FGETNAMEINFO) |
376 | (const struct sockaddr FAR * sa, socklen_t salen, |
377 | char FAR * host, size_t hostlen, char FAR * serv, |
378 | size_t servlen, int flags); |
c4d8e107 |
379 | FGETNAMEINFO fGetNameInfo = NULL; |
380 | |
381 | /* Are we in IPv4 fallback mode? */ |
382 | /* We put the IPv4 address into the a variable so we can further-on use the IPv4 code... */ |
383 | if (ret->family == AF_INET) |
32874aea |
384 | memcpy(&a, |
385 | (char *) &((SOCKADDR_IN *) ret->ai-> |
386 | ai_addr)->sin_addr, sizeof(a)); |
c4d8e107 |
387 | |
388 | /* Now let's find that canonicalname... */ |
32874aea |
389 | if ((dllWSHIP6) |
390 | && (fGetNameInfo = |
391 | (FGETNAMEINFO) GetProcAddress(dllWSHIP6, |
392 | "getnameinfo"))) { |
393 | if (fGetNameInfo |
394 | ((struct sockaddr *) ret->ai->ai_addr, |
395 | ret->family == |
396 | AF_INET ? sizeof(SOCKADDR_IN) : |
6e1ebb76 |
397 | sizeof(SOCKADDR_IN6), realhost, |
398 | sizeof(realhost), NULL, 0, 0) != 0) { |
399 | strncpy(realhost, host, sizeof(realhost)); |
c4d8e107 |
400 | } |
401 | } |
402 | } |
403 | /* We used the IPv4-only gethostbyname()... */ |
404 | else |
c4d8e107 |
405 | #endif |
32874aea |
406 | { |
c4d8e107 |
407 | memcpy(&a, h->h_addr, sizeof(a)); |
408 | /* This way we are always sure the h->h_name is valid :) */ |
6e1ebb76 |
409 | strncpy(realhost, h->h_name, sizeof(realhost)); |
c4d8e107 |
410 | } |
c4d8e107 |
411 | } |
05581745 |
412 | #ifndef NO_IPV6 |
c4d8e107 |
413 | FreeLibrary(dllWSHIP6); |
414 | #endif |
32874aea |
415 | } else { |
87ed061f |
416 | /* |
417 | * This must be a numeric IPv4 address because it caused a |
418 | * success return from inet_addr. |
419 | */ |
32874aea |
420 | ret->family = AF_INET; |
6e1ebb76 |
421 | strncpy(realhost, host, sizeof(realhost)); |
2f75bae1 |
422 | } |
7440fd44 |
423 | ret->address = p_ntohl(a); |
6e1ebb76 |
424 | realhost[lenof(realhost)-1] = '\0'; |
3d88e64d |
425 | *canonicalname = snewn(1+strlen(realhost), char); |
6e1ebb76 |
426 | strcpy(*canonicalname, realhost); |
2f75bae1 |
427 | return ret; |
428 | } |
429 | |
e8fa8f62 |
430 | SockAddr sk_nonamelookup(const char *host) |
b7a189f3 |
431 | { |
3d88e64d |
432 | SockAddr ret = snew(struct SockAddr_tag); |
ab0873ab |
433 | ret->error = NULL; |
b7a189f3 |
434 | ret->family = AF_UNSPEC; |
435 | strncpy(ret->hostname, host, lenof(ret->hostname)); |
436 | ret->hostname[lenof(ret->hostname)-1] = '\0'; |
437 | return ret; |
438 | } |
439 | |
3ad9d396 |
440 | void sk_getaddr(SockAddr addr, char *buf, int buflen) |
441 | { |
05581745 |
442 | #ifndef NO_IPV6 |
b7a189f3 |
443 | if (addr->family == AF_INET6) { |
05581745 |
444 | /* Try to get the WSAAddressToStringA() function from wship6.dll */ |
445 | /* This way one doesn't need to have IPv6 dll's to use PuTTY and |
446 | * it will fallback to IPv4. */ |
447 | typedef int (CALLBACK * FADDRTOSTR) (LPSOCKADDR lpsaAddress, |
448 | DWORD dwAddressLength, |
449 | LPWSAPROTOCOL_INFO lpProtocolInfo, |
450 | OUT LPTSTR lpszAddressString, |
451 | IN OUT LPDWORD lpdwAddressStringLength |
452 | ); |
453 | FADDRTOSTR fAddrToStr = NULL; |
454 | |
455 | HINSTANCE dllWS2 = LoadLibrary("ws2_32.dll"); |
456 | if (dllWS2) { |
457 | fAddrToStr = (FADDRTOSTR)GetProcAddress(dllWS2, |
458 | "WSAAddressToStringA"); |
459 | if (fAddrToStr) { |
460 | fAddrToStr(addr->ai->ai_addr, addr->ai->ai_addrlen, |
461 | NULL, buf, &buflen); |
462 | } |
463 | else strncpy(buf, "IPv6", buflen); |
464 | FreeLibrary(dllWS2); |
465 | } |
b7a189f3 |
466 | } else |
3ad9d396 |
467 | #endif |
b7a189f3 |
468 | if (addr->family == AF_INET) { |
3ad9d396 |
469 | struct in_addr a; |
7440fd44 |
470 | a.s_addr = p_htonl(addr->address); |
471 | strncpy(buf, p_inet_ntoa(a), buflen); |
b7a189f3 |
472 | buf[buflen-1] = '\0'; |
3ad9d396 |
473 | } else { |
b7a189f3 |
474 | strncpy(buf, addr->hostname, buflen); |
475 | buf[buflen-1] = '\0'; |
3ad9d396 |
476 | } |
3ad9d396 |
477 | } |
478 | |
b804e1e5 |
479 | int sk_hostname_is_local(char *name) |
480 | { |
481 | return !strcmp(name, "localhost"); |
482 | } |
483 | |
a143ea0a |
484 | static INTERFACE_INFO local_interfaces[16]; |
485 | static int n_local_interfaces; /* 0=not yet, -1=failed, >0=number */ |
486 | |
487 | static int ipv4_is_local_addr(struct in_addr addr) |
488 | { |
489 | if (ipv4_is_loopback(addr)) |
490 | return 1; /* loopback addresses are local */ |
491 | if (!n_local_interfaces) { |
492 | SOCKET s = p_socket(AF_INET, SOCK_DGRAM, 0); |
493 | DWORD retbytes; |
494 | |
495 | if (p_WSAIoctl && |
496 | p_WSAIoctl(s, SIO_GET_INTERFACE_LIST, NULL, 0, |
497 | local_interfaces, sizeof(local_interfaces), |
498 | &retbytes, NULL, NULL) == 0) |
499 | n_local_interfaces = retbytes / sizeof(INTERFACE_INFO); |
500 | else |
501 | logevent(NULL, "Unable to get list of local IP addresses"); |
502 | } |
503 | if (n_local_interfaces > 0) { |
504 | int i; |
505 | for (i = 0; i < n_local_interfaces; i++) { |
506 | SOCKADDR_IN *address = |
507 | (SOCKADDR_IN *)&local_interfaces[i].iiAddress; |
508 | if (address->sin_addr.s_addr == addr.s_addr) |
509 | return 1; /* this address is local */ |
510 | } |
511 | } |
512 | return 0; /* this address is not local */ |
513 | } |
514 | |
b804e1e5 |
515 | int sk_address_is_local(SockAddr addr) |
516 | { |
05581745 |
517 | #ifndef NO_IPV6 |
b7a189f3 |
518 | if (addr->family == AF_INET6) { |
05581745 |
519 | return IN6_IS_ADDR_LOOPBACK((const struct in6_addr *)addr->ai->ai_addr); |
b7a189f3 |
520 | } else |
b804e1e5 |
521 | #endif |
b7a189f3 |
522 | if (addr->family == AF_INET) { |
b804e1e5 |
523 | struct in_addr a; |
7440fd44 |
524 | a.s_addr = p_htonl(addr->address); |
a143ea0a |
525 | return ipv4_is_local_addr(a); |
b804e1e5 |
526 | } else { |
b7a189f3 |
527 | assert(addr->family == AF_UNSPEC); |
528 | return 0; /* we don't know; assume not */ |
b804e1e5 |
529 | } |
b804e1e5 |
530 | } |
531 | |
6971bbe7 |
532 | int sk_addrtype(SockAddr addr) |
533 | { |
b7a189f3 |
534 | return (addr->family == AF_INET ? ADDRTYPE_IPV4 : |
05581745 |
535 | #ifndef NO_IPV6 |
b7a189f3 |
536 | addr->family == AF_INET6 ? ADDRTYPE_IPV6 : |
537 | #endif |
538 | ADDRTYPE_NAME); |
6971bbe7 |
539 | } |
540 | |
541 | void sk_addrcopy(SockAddr addr, char *buf) |
542 | { |
b7a189f3 |
543 | assert(addr->family != AF_UNSPEC); |
05581745 |
544 | #ifndef NO_IPV6 |
b7a189f3 |
545 | if (addr->family == AF_INET6) { |
546 | memcpy(buf, (char*) addr->ai, 16); |
547 | } else |
6971bbe7 |
548 | #endif |
b7a189f3 |
549 | if (addr->family == AF_INET) { |
6971bbe7 |
550 | struct in_addr a; |
7440fd44 |
551 | a.s_addr = p_htonl(addr->address); |
96d9eb89 |
552 | memcpy(buf, (char*) &a.s_addr, 4); |
6971bbe7 |
553 | } |
6971bbe7 |
554 | } |
555 | |
32874aea |
556 | void sk_addr_free(SockAddr addr) |
557 | { |
2f75bae1 |
558 | sfree(addr); |
559 | } |
560 | |
32874aea |
561 | static Plug sk_tcp_plug(Socket sock, Plug p) |
562 | { |
7e78000d |
563 | Actual_Socket s = (Actual_Socket) sock; |
564 | Plug ret = s->plug; |
32874aea |
565 | if (p) |
566 | s->plug = p; |
7e78000d |
567 | return ret; |
568 | } |
569 | |
32874aea |
570 | static void sk_tcp_flush(Socket s) |
571 | { |
7e78000d |
572 | /* |
573 | * We send data to the socket as soon as we can anyway, |
574 | * so we don't need to do anything here. :-) |
575 | */ |
576 | } |
577 | |
2d466ffd |
578 | static void sk_tcp_close(Socket s); |
e0e7dff8 |
579 | static int sk_tcp_write(Socket s, const char *data, int len); |
580 | static int sk_tcp_write_oob(Socket s, const char *data, int len); |
8eebd221 |
581 | static void sk_tcp_set_private_ptr(Socket s, void *ptr); |
582 | static void *sk_tcp_get_private_ptr(Socket s); |
583 | static void sk_tcp_set_frozen(Socket s, int is_frozen); |
cbe2d68f |
584 | static const char *sk_tcp_socket_error(Socket s); |
7e78000d |
585 | |
d74d141c |
586 | extern char *do_select(SOCKET skt, int startup); |
587 | |
588 | Socket sk_register(void *sock, Plug plug) |
589 | { |
c85623f9 |
590 | static const struct socket_function_table fn_table = { |
d74d141c |
591 | sk_tcp_plug, |
592 | sk_tcp_close, |
593 | sk_tcp_write, |
594 | sk_tcp_write_oob, |
595 | sk_tcp_flush, |
8eebd221 |
596 | sk_tcp_set_private_ptr, |
597 | sk_tcp_get_private_ptr, |
598 | sk_tcp_set_frozen, |
d74d141c |
599 | sk_tcp_socket_error |
600 | }; |
601 | |
602 | DWORD err; |
603 | char *errstr; |
604 | Actual_Socket ret; |
605 | |
606 | /* |
607 | * Create Socket structure. |
608 | */ |
3d88e64d |
609 | ret = snew(struct Socket_tag); |
d74d141c |
610 | ret->fn = &fn_table; |
611 | ret->error = NULL; |
612 | ret->plug = plug; |
5471d09a |
613 | bufchain_init(&ret->output_data); |
d74d141c |
614 | ret->writable = 1; /* to start with */ |
615 | ret->sending_oob = 0; |
616 | ret->frozen = 1; |
5471d09a |
617 | ret->frozen_readable = 0; |
bc4802a1 |
618 | ret->localhost_only = 0; /* unused, but best init anyway */ |
7732d38a |
619 | ret->pending_error = 0; |
d74d141c |
620 | |
621 | ret->s = (SOCKET)sock; |
622 | |
623 | if (ret->s == INVALID_SOCKET) { |
7440fd44 |
624 | err = p_WSAGetLastError(); |
d74d141c |
625 | ret->error = winsock_error_string(err); |
626 | return (Socket) ret; |
627 | } |
628 | |
629 | ret->oobinline = 0; |
630 | |
631 | /* Set up a select mechanism. This could be an AsyncSelect on a |
632 | * window, or an EventSelect on an event object. */ |
633 | errstr = do_select(ret->s, 1); |
634 | if (errstr) { |
635 | ret->error = errstr; |
636 | return (Socket) ret; |
637 | } |
638 | |
639 | add234(sktree, ret); |
640 | |
641 | return (Socket) ret; |
642 | } |
643 | |
4b1e8acc |
644 | Socket sk_new(SockAddr addr, int port, int privport, int oobinline, |
79bf227b |
645 | int nodelay, int keepalive, Plug plug) |
7e78000d |
646 | { |
c85623f9 |
647 | static const struct socket_function_table fn_table = { |
7e78000d |
648 | sk_tcp_plug, |
649 | sk_tcp_close, |
650 | sk_tcp_write, |
651 | sk_tcp_write_oob, |
652 | sk_tcp_flush, |
8eebd221 |
653 | sk_tcp_set_private_ptr, |
654 | sk_tcp_get_private_ptr, |
655 | sk_tcp_set_frozen, |
7e78000d |
656 | sk_tcp_socket_error |
657 | }; |
658 | |
2f75bae1 |
659 | SOCKET s; |
05581745 |
660 | #ifndef NO_IPV6 |
c4d8e107 |
661 | SOCKADDR_IN6 a6; |
662 | #endif |
2f75bae1 |
663 | SOCKADDR_IN a; |
664 | DWORD err; |
665 | char *errstr; |
7e78000d |
666 | Actual_Socket ret; |
c91409da |
667 | short localport; |
2f75bae1 |
668 | |
669 | /* |
670 | * Create Socket structure. |
671 | */ |
3d88e64d |
672 | ret = snew(struct Socket_tag); |
7e78000d |
673 | ret->fn = &fn_table; |
2f75bae1 |
674 | ret->error = NULL; |
7e78000d |
675 | ret->plug = plug; |
5471d09a |
676 | bufchain_init(&ret->output_data); |
3ad9d396 |
677 | ret->connected = 0; /* to start with */ |
678 | ret->writable = 0; /* to start with */ |
33232c8f |
679 | ret->sending_oob = 0; |
d74d141c |
680 | ret->frozen = 0; |
5471d09a |
681 | ret->frozen_readable = 0; |
bc4802a1 |
682 | ret->localhost_only = 0; /* unused, but best init anyway */ |
7732d38a |
683 | ret->pending_error = 0; |
2f75bae1 |
684 | |
685 | /* |
686 | * Open socket. |
687 | */ |
05581745 |
688 | #ifndef NO_IPV6 |
689 | /* Let's default to IPv6, this shouldn't hurt anybody |
690 | * If the stack supports IPv6 it will also allow IPv4 connections. */ |
691 | if (addr->family == AF_UNSPEC) addr->family = AF_INET6; |
692 | #else |
693 | /* No other choice, default to IPv4 */ |
694 | if (addr->family == AF_UNSPEC) addr->family = AF_INET; |
695 | #endif |
7440fd44 |
696 | s = p_socket(addr->family, SOCK_STREAM, 0); |
2f75bae1 |
697 | ret->s = s; |
698 | |
699 | if (s == INVALID_SOCKET) { |
7440fd44 |
700 | err = p_WSAGetLastError(); |
32874aea |
701 | ret->error = winsock_error_string(err); |
7e78000d |
702 | return (Socket) ret; |
2f75bae1 |
703 | } |
4b1e8acc |
704 | |
705 | ret->oobinline = oobinline; |
706 | if (oobinline) { |
1ad4eb6f |
707 | BOOL b = TRUE; |
7440fd44 |
708 | p_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (void *) &b, sizeof(b)); |
1ad4eb6f |
709 | } |
2f75bae1 |
710 | |
2184a5d9 |
711 | if (nodelay) { |
712 | BOOL b = TRUE; |
7440fd44 |
713 | p_setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (void *) &b, sizeof(b)); |
2184a5d9 |
714 | } |
715 | |
79bf227b |
716 | if (keepalive) { |
717 | BOOL b = TRUE; |
718 | p_setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *) &b, sizeof(b)); |
719 | } |
720 | |
2f75bae1 |
721 | /* |
722 | * Bind to local address. |
723 | */ |
c91409da |
724 | if (privport) |
32874aea |
725 | localport = 1023; /* count from 1023 downwards */ |
c4d8e107 |
726 | else |
32874aea |
727 | localport = 0; /* just use port 0 (ie winsock picks) */ |
c91409da |
728 | |
729 | /* Loop round trying to bind */ |
730 | while (1) { |
32874aea |
731 | int retcode; |
c91409da |
732 | |
05581745 |
733 | #ifndef NO_IPV6 |
32874aea |
734 | if (addr->family == AF_INET6) { |
735 | memset(&a6, 0, sizeof(a6)); |
736 | a6.sin6_family = AF_INET6; |
05581745 |
737 | /*a6.sin6_addr = in6addr_any; */ /* == 0 done by memset() */ |
7440fd44 |
738 | a6.sin6_port = p_htons(localport); |
32874aea |
739 | } else |
c4d8e107 |
740 | #endif |
32874aea |
741 | { |
742 | a.sin_family = AF_INET; |
7440fd44 |
743 | a.sin_addr.s_addr = p_htonl(INADDR_ANY); |
744 | a.sin_port = p_htons(localport); |
32874aea |
745 | } |
05581745 |
746 | #ifndef NO_IPV6 |
7440fd44 |
747 | retcode = p_bind(s, (addr->family == AF_INET6 ? |
32874aea |
748 | (struct sockaddr *) &a6 : |
749 | (struct sockaddr *) &a), |
750 | (addr->family == |
751 | AF_INET6 ? sizeof(a6) : sizeof(a))); |
c4d8e107 |
752 | #else |
7440fd44 |
753 | retcode = p_bind(s, (struct sockaddr *) &a, sizeof(a)); |
c4d8e107 |
754 | #endif |
32874aea |
755 | if (retcode != SOCKET_ERROR) { |
756 | err = 0; |
757 | break; /* done */ |
758 | } else { |
7440fd44 |
759 | err = p_WSAGetLastError(); |
32874aea |
760 | if (err != WSAEADDRINUSE) /* failed, for a bad reason */ |
761 | break; |
762 | } |
763 | |
764 | if (localport == 0) |
765 | break; /* we're only looping once */ |
766 | localport--; |
767 | if (localport == 0) |
768 | break; /* we might have got to the end */ |
c91409da |
769 | } |
770 | |
32874aea |
771 | if (err) { |
c4d8e107 |
772 | ret->error = winsock_error_string(err); |
7e78000d |
773 | return (Socket) ret; |
2f75bae1 |
774 | } |
775 | |
776 | /* |
777 | * Connect to remote address. |
778 | */ |
05581745 |
779 | #ifndef NO_IPV6 |
32874aea |
780 | if (addr->family == AF_INET6) { |
781 | memset(&a, 0, sizeof(a)); |
c4d8e107 |
782 | a6.sin6_family = AF_INET6; |
7440fd44 |
783 | a6.sin6_port = p_htons((short) port); |
32874aea |
784 | a6.sin6_addr = |
785 | ((struct sockaddr_in6 *) addr->ai->ai_addr)->sin6_addr; |
786 | } else |
c4d8e107 |
787 | #endif |
32874aea |
788 | { |
c4d8e107 |
789 | a.sin_family = AF_INET; |
7440fd44 |
790 | a.sin_addr.s_addr = p_htonl(addr->address); |
791 | a.sin_port = p_htons((short) port); |
c4d8e107 |
792 | } |
3ad9d396 |
793 | |
794 | /* Set up a select mechanism. This could be an AsyncSelect on a |
795 | * window, or an EventSelect on an event object. */ |
796 | errstr = do_select(s, 1); |
797 | if (errstr) { |
798 | ret->error = errstr; |
799 | return (Socket) ret; |
800 | } |
801 | |
32874aea |
802 | if (( |
05581745 |
803 | #ifndef NO_IPV6 |
7440fd44 |
804 | p_connect(s, ((addr->family == AF_INET6) ? |
32874aea |
805 | (struct sockaddr *) &a6 : (struct sockaddr *) &a), |
806 | (addr->family == AF_INET6) ? sizeof(a6) : sizeof(a)) |
c4d8e107 |
807 | #else |
7440fd44 |
808 | p_connect(s, (struct sockaddr *) &a, sizeof(a)) |
c4d8e107 |
809 | #endif |
32874aea |
810 | ) == SOCKET_ERROR) { |
7440fd44 |
811 | err = p_WSAGetLastError(); |
3ad9d396 |
812 | /* |
813 | * We expect a potential EWOULDBLOCK here, because the |
814 | * chances are the front end has done a select for |
815 | * FD_CONNECT, so that connect() will complete |
816 | * asynchronously. |
817 | */ |
818 | if ( err != WSAEWOULDBLOCK ) { |
819 | ret->error = winsock_error_string(err); |
820 | return (Socket) ret; |
821 | } |
822 | } else { |
823 | /* |
824 | * If we _don't_ get EWOULDBLOCK, the connect has completed |
825 | * and we should set the socket as writable. |
826 | */ |
827 | ret->writable = 1; |
2f75bae1 |
828 | } |
829 | |
830 | add234(sktree, ret); |
831 | |
f85e6f6e |
832 | /* We're done with 'addr' now. */ |
833 | sk_addr_free(addr); |
834 | |
7e78000d |
835 | return (Socket) ret; |
2f75bae1 |
836 | } |
837 | |
05581745 |
838 | Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only, |
839 | int address_family) |
d74d141c |
840 | { |
c85623f9 |
841 | static const struct socket_function_table fn_table = { |
d74d141c |
842 | sk_tcp_plug, |
843 | sk_tcp_close, |
844 | sk_tcp_write, |
845 | sk_tcp_write_oob, |
846 | sk_tcp_flush, |
8eebd221 |
847 | sk_tcp_set_private_ptr, |
848 | sk_tcp_get_private_ptr, |
849 | sk_tcp_set_frozen, |
d74d141c |
850 | sk_tcp_socket_error |
851 | }; |
852 | |
853 | SOCKET s; |
05581745 |
854 | #ifndef NO_IPV6 |
d74d141c |
855 | SOCKADDR_IN6 a6; |
856 | #endif |
857 | SOCKADDR_IN a; |
05581745 |
858 | |
d74d141c |
859 | DWORD err; |
860 | char *errstr; |
861 | Actual_Socket ret; |
862 | int retcode; |
863 | int on = 1; |
864 | |
865 | /* |
866 | * Create Socket structure. |
867 | */ |
3d88e64d |
868 | ret = snew(struct Socket_tag); |
d74d141c |
869 | ret->fn = &fn_table; |
870 | ret->error = NULL; |
871 | ret->plug = plug; |
5471d09a |
872 | bufchain_init(&ret->output_data); |
d74d141c |
873 | ret->writable = 0; /* to start with */ |
874 | ret->sending_oob = 0; |
875 | ret->frozen = 0; |
5471d09a |
876 | ret->frozen_readable = 0; |
bc4802a1 |
877 | ret->localhost_only = local_host_only; |
7732d38a |
878 | ret->pending_error = 0; |
d74d141c |
879 | |
880 | /* |
05581745 |
881 | * Translate address_family from platform-independent constants |
882 | * into local reality. |
883 | */ |
884 | address_family = (address_family == ADDRTYPE_IPV4 ? AF_INET : |
885 | #ifndef NO_IPV6 |
886 | address_family == ADDRTYPE_IPV6 ? AF_INET6 : |
887 | #endif |
888 | AF_UNSPEC); |
889 | |
890 | #ifndef NO_IPV6 |
891 | /* Let's default to IPv6, this shouldn't hurt anybody |
892 | * If the stack supports IPv6 it will also allow IPv4 connections. */ |
893 | if (address_family == AF_UNSPEC) address_family = AF_INET6; |
894 | #else |
895 | /* No other choice, default to IPv4 */ |
896 | if (address_family == AF_UNSPEC) address_family = AF_INET; |
897 | #endif |
898 | |
899 | /* |
d74d141c |
900 | * Open socket. |
901 | */ |
05581745 |
902 | s = p_socket(address_family, SOCK_STREAM, 0); |
d74d141c |
903 | ret->s = s; |
904 | |
905 | if (s == INVALID_SOCKET) { |
7440fd44 |
906 | err = p_WSAGetLastError(); |
d74d141c |
907 | ret->error = winsock_error_string(err); |
908 | return (Socket) ret; |
909 | } |
910 | |
911 | ret->oobinline = 0; |
912 | |
7440fd44 |
913 | p_setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *)&on, sizeof(on)); |
d74d141c |
914 | |
05581745 |
915 | #ifndef NO_IPV6 |
916 | if (address_family == AF_INET6) { |
d74d141c |
917 | memset(&a6, 0, sizeof(a6)); |
918 | a6.sin6_family = AF_INET6; |
6ee9b735 |
919 | /* FIXME: srcaddr is ignored for IPv6, because I (SGT) don't |
05581745 |
920 | * know how to do it. :-) |
921 | * (jeroen:) saddr is specified as an address.. eg 2001:db8::1 |
922 | * Thus we need either a parser that understands [2001:db8::1]:80 |
923 | * style addresses and/or enhance this to understand hostnames too. */ |
bcce45ed |
924 | if (local_host_only) |
925 | a6.sin6_addr = in6addr_loopback; |
926 | else |
927 | a6.sin6_addr = in6addr_any; |
7440fd44 |
928 | a6.sin6_port = p_htons(port); |
d74d141c |
929 | } else |
930 | #endif |
931 | { |
6ee9b735 |
932 | int got_addr = 0; |
d74d141c |
933 | a.sin_family = AF_INET; |
6ee9b735 |
934 | |
935 | /* |
936 | * Bind to source address. First try an explicitly |
937 | * specified one... |
938 | */ |
939 | if (srcaddr) { |
7440fd44 |
940 | a.sin_addr.s_addr = p_inet_addr(srcaddr); |
6ee9b735 |
941 | if (a.sin_addr.s_addr != INADDR_NONE) { |
942 | /* Override localhost_only with specified listen addr. */ |
943 | ret->localhost_only = ipv4_is_loopback(a.sin_addr); |
944 | got_addr = 1; |
945 | } |
946 | } |
947 | |
948 | /* |
949 | * ... and failing that, go with one of the standard ones. |
950 | */ |
951 | if (!got_addr) { |
952 | if (local_host_only) |
7440fd44 |
953 | a.sin_addr.s_addr = p_htonl(INADDR_LOOPBACK); |
6ee9b735 |
954 | else |
7440fd44 |
955 | a.sin_addr.s_addr = p_htonl(INADDR_ANY); |
6ee9b735 |
956 | } |
957 | |
7440fd44 |
958 | a.sin_port = p_htons((short)port); |
d74d141c |
959 | } |
05581745 |
960 | #ifndef NO_IPV6 |
961 | retcode = p_bind(s, (address_family == AF_INET6 ? |
d74d141c |
962 | (struct sockaddr *) &a6 : |
963 | (struct sockaddr *) &a), |
05581745 |
964 | (address_family == |
d74d141c |
965 | AF_INET6 ? sizeof(a6) : sizeof(a))); |
966 | #else |
7440fd44 |
967 | retcode = p_bind(s, (struct sockaddr *) &a, sizeof(a)); |
d74d141c |
968 | #endif |
969 | if (retcode != SOCKET_ERROR) { |
970 | err = 0; |
971 | } else { |
7440fd44 |
972 | err = p_WSAGetLastError(); |
d74d141c |
973 | } |
974 | |
975 | if (err) { |
976 | ret->error = winsock_error_string(err); |
977 | return (Socket) ret; |
978 | } |
979 | |
980 | |
7440fd44 |
981 | if (p_listen(s, SOMAXCONN) == SOCKET_ERROR) { |
982 | p_closesocket(s); |
d74d141c |
983 | ret->error = winsock_error_string(err); |
984 | return (Socket) ret; |
985 | } |
986 | |
987 | /* Set up a select mechanism. This could be an AsyncSelect on a |
988 | * window, or an EventSelect on an event object. */ |
989 | errstr = do_select(s, 1); |
990 | if (errstr) { |
991 | ret->error = errstr; |
992 | return (Socket) ret; |
993 | } |
994 | |
995 | add234(sktree, ret); |
996 | |
997 | return (Socket) ret; |
998 | } |
999 | |
32874aea |
1000 | static void sk_tcp_close(Socket sock) |
1001 | { |
9c964e85 |
1002 | extern char *do_select(SOCKET skt, int startup); |
7e78000d |
1003 | Actual_Socket s = (Actual_Socket) sock; |
9c964e85 |
1004 | |
2f75bae1 |
1005 | del234(sktree, s); |
1006 | do_select(s->s, 0); |
7440fd44 |
1007 | p_closesocket(s->s); |
dcbde236 |
1008 | sfree(s); |
2f75bae1 |
1009 | } |
1010 | |
2f75bae1 |
1011 | /* |
1012 | * The function which tries to send on a socket once it's deemed |
1013 | * writable. |
1014 | */ |
32874aea |
1015 | void try_send(Actual_Socket s) |
1016 | { |
5471d09a |
1017 | while (s->sending_oob || bufchain_size(&s->output_data) > 0) { |
2f75bae1 |
1018 | int nsent; |
1019 | DWORD err; |
5471d09a |
1020 | void *data; |
32874aea |
1021 | int len, urgentflag; |
1022 | |
1023 | if (s->sending_oob) { |
1024 | urgentflag = MSG_OOB; |
1025 | len = s->sending_oob; |
5471d09a |
1026 | data = &s->oobdata; |
32874aea |
1027 | } else { |
1028 | urgentflag = 0; |
5471d09a |
1029 | bufchain_prefix(&s->output_data, &data, &len); |
32874aea |
1030 | } |
7440fd44 |
1031 | nsent = p_send(s->s, data, len, urgentflag); |
32874aea |
1032 | noise_ultralight(nsent); |
2f75bae1 |
1033 | if (nsent <= 0) { |
7440fd44 |
1034 | err = (nsent < 0 ? p_WSAGetLastError() : 0); |
e5eb3a1c |
1035 | if ((err < WSABASEERR && nsent < 0) || err == WSAEWOULDBLOCK) { |
d40a94b9 |
1036 | /* |
1037 | * Perfectly normal: we've sent all we can for the moment. |
1038 | * |
e5eb3a1c |
1039 | * (Some WinSock send() implementations can return |
1040 | * <0 but leave no sensible error indication - |
1041 | * WSAGetLastError() is called but returns zero or |
1042 | * a small number - so we check that case and treat |
1043 | * it just like WSAEWOULDBLOCK.) |
d40a94b9 |
1044 | */ |
2f75bae1 |
1045 | s->writable = FALSE; |
32874aea |
1046 | return; |
2f75bae1 |
1047 | } else if (nsent == 0 || |
32874aea |
1048 | err == WSAECONNABORTED || err == WSAECONNRESET) { |
1049 | /* |
7732d38a |
1050 | * If send() returns CONNABORTED or CONNRESET, we |
1051 | * unfortunately can't just call plug_closing(), |
1052 | * because it's quite likely that we're currently |
1053 | * _in_ a call from the code we'd be calling back |
1054 | * to, so we'd have to make half the SSH code |
1055 | * reentrant. Instead we flag a pending error on |
1056 | * the socket, to be dealt with (by calling |
1057 | * plug_closing()) at some suitable future moment. |
32874aea |
1058 | */ |
7732d38a |
1059 | s->pending_error = err; |
1060 | return; |
2f75bae1 |
1061 | } else { |
a8327734 |
1062 | /* We're inside the Windows frontend here, so we know |
1063 | * that the frontend handle is unnecessary. */ |
1064 | logevent(NULL, winsock_error_string(err)); |
247308b5 |
1065 | fatalbox("%s", winsock_error_string(err)); |
2f75bae1 |
1066 | } |
1067 | } else { |
5471d09a |
1068 | if (s->sending_oob) { |
1069 | if (nsent < len) { |
1070 | memmove(s->oobdata, s->oobdata+nsent, len-nsent); |
1071 | s->sending_oob = len - nsent; |
1072 | } else { |
1073 | s->sending_oob = 0; |
1074 | } |
1075 | } else { |
1076 | bufchain_consume(&s->output_data, nsent); |
2f75bae1 |
1077 | } |
1078 | } |
1079 | } |
1080 | } |
1081 | |
e0e7dff8 |
1082 | static int sk_tcp_write(Socket sock, const char *buf, int len) |
32874aea |
1083 | { |
7e78000d |
1084 | Actual_Socket s = (Actual_Socket) sock; |
1085 | |
2f75bae1 |
1086 | /* |
1087 | * Add the data to the buffer list on the socket. |
1088 | */ |
5471d09a |
1089 | bufchain_add(&s->output_data, buf, len); |
2f75bae1 |
1090 | |
1091 | /* |
1092 | * Now try sending from the start of the buffer list. |
1093 | */ |
1094 | if (s->writable) |
1095 | try_send(s); |
5471d09a |
1096 | |
1097 | return bufchain_size(&s->output_data); |
2f75bae1 |
1098 | } |
1099 | |
e0e7dff8 |
1100 | static int sk_tcp_write_oob(Socket sock, const char *buf, int len) |
32874aea |
1101 | { |
7e78000d |
1102 | Actual_Socket s = (Actual_Socket) sock; |
1103 | |
2f75bae1 |
1104 | /* |
1105 | * Replace the buffer list on the socket with the data. |
1106 | */ |
5471d09a |
1107 | bufchain_clear(&s->output_data); |
1108 | assert(len <= sizeof(s->oobdata)); |
1109 | memcpy(s->oobdata, buf, len); |
2f75bae1 |
1110 | s->sending_oob = len; |
1111 | |
1112 | /* |
1113 | * Now try sending from the start of the buffer list. |
1114 | */ |
1115 | if (s->writable) |
1116 | try_send(s); |
5471d09a |
1117 | |
1118 | return s->sending_oob; |
2f75bae1 |
1119 | } |
1120 | |
32874aea |
1121 | int select_result(WPARAM wParam, LPARAM lParam) |
1122 | { |
f9d3f227 |
1123 | int ret, open; |
2f75bae1 |
1124 | DWORD err; |
b675c612 |
1125 | char buf[20480]; /* nice big buffer for plenty of speed */ |
7e78000d |
1126 | Actual_Socket s; |
49bad831 |
1127 | u_long atmark; |
2f75bae1 |
1128 | |
1129 | /* wParam is the socket itself */ |
cc8b0ee9 |
1130 | |
ce6fcfa5 |
1131 | if (wParam == 0) |
1132 | return 1; /* boggle */ |
cc8b0ee9 |
1133 | |
32874aea |
1134 | s = find234(sktree, (void *) wParam, cmpforsearch); |
2f75bae1 |
1135 | if (!s) |
1136 | return 1; /* boggle */ |
1137 | |
1138 | if ((err = WSAGETSELECTERROR(lParam)) != 0) { |
32874aea |
1139 | /* |
1140 | * An error has occurred on this socket. Pass it to the |
1141 | * plug. |
1142 | */ |
1143 | return plug_closing(s->plug, winsock_error_string(err), err, 0); |
2f75bae1 |
1144 | } |
1145 | |
7d6ee6ff |
1146 | noise_ultralight(lParam); |
1147 | |
2f75bae1 |
1148 | switch (WSAGETSELECTEVENT(lParam)) { |
3ad9d396 |
1149 | case FD_CONNECT: |
1150 | s->connected = s->writable = 1; |
1151 | break; |
2f75bae1 |
1152 | case FD_READ: |
d74d141c |
1153 | /* In the case the socket is still frozen, we don't even bother */ |
5471d09a |
1154 | if (s->frozen) { |
1155 | s->frozen_readable = 1; |
d74d141c |
1156 | break; |
5471d09a |
1157 | } |
d74d141c |
1158 | |
32874aea |
1159 | /* |
1160 | * We have received data on the socket. For an oobinline |
1161 | * socket, this might be data _before_ an urgent pointer, |
1162 | * in which case we send it to the back end with type==1 |
1163 | * (data prior to urgent). |
1164 | */ |
1165 | if (s->oobinline) { |
1166 | atmark = 1; |
7440fd44 |
1167 | p_ioctlsocket(s->s, SIOCATMARK, &atmark); |
32874aea |
1168 | /* |
1169 | * Avoid checking the return value from ioctlsocket(), |
1170 | * on the grounds that some WinSock wrappers don't |
1171 | * support it. If it does nothing, we get atmark==1, |
1172 | * which is equivalent to `no OOB pending', so the |
1173 | * effect will be to non-OOB-ify any OOB data. |
1174 | */ |
1175 | } else |
1176 | atmark = 1; |
4b1e8acc |
1177 | |
7440fd44 |
1178 | ret = p_recv(s->s, buf, sizeof(buf), 0); |
32874aea |
1179 | noise_ultralight(ret); |
2f75bae1 |
1180 | if (ret < 0) { |
7440fd44 |
1181 | err = p_WSAGetLastError(); |
2f75bae1 |
1182 | if (err == WSAEWOULDBLOCK) { |
1183 | break; |
1184 | } |
1185 | } |
1186 | if (ret < 0) { |
32874aea |
1187 | return plug_closing(s->plug, winsock_error_string(err), err, |
1188 | 0); |
7e78000d |
1189 | } else if (0 == ret) { |
32874aea |
1190 | return plug_closing(s->plug, NULL, 0, 0); |
2f75bae1 |
1191 | } else { |
32874aea |
1192 | return plug_receive(s->plug, atmark ? 0 : 1, buf, ret); |
2f75bae1 |
1193 | } |
1194 | break; |
1195 | case FD_OOB: |
32874aea |
1196 | /* |
1197 | * This will only happen on a non-oobinline socket. It |
1198 | * indicates that we can immediately perform an OOB read |
1199 | * and get back OOB data, which we will send to the back |
1200 | * end with type==2 (urgent data). |
1201 | */ |
7440fd44 |
1202 | ret = p_recv(s->s, buf, sizeof(buf), MSG_OOB); |
32874aea |
1203 | noise_ultralight(ret); |
1204 | if (ret <= 0) { |
247308b5 |
1205 | char *str = (ret == 0 ? "Internal networking trouble" : |
7440fd44 |
1206 | winsock_error_string(p_WSAGetLastError())); |
a8327734 |
1207 | /* We're inside the Windows frontend here, so we know |
1208 | * that the frontend handle is unnecessary. */ |
1209 | logevent(NULL, str); |
247308b5 |
1210 | fatalbox("%s", str); |
32874aea |
1211 | } else { |
1212 | return plug_receive(s->plug, 2, buf, ret); |
1213 | } |
1214 | break; |
2f75bae1 |
1215 | case FD_WRITE: |
5471d09a |
1216 | { |
1217 | int bufsize_before, bufsize_after; |
1218 | s->writable = 1; |
1219 | bufsize_before = s->sending_oob + bufchain_size(&s->output_data); |
1220 | try_send(s); |
1221 | bufsize_after = s->sending_oob + bufchain_size(&s->output_data); |
1222 | if (bufsize_after < bufsize_before) |
1223 | plug_sent(s->plug, bufsize_after); |
1224 | } |
2f75bae1 |
1225 | break; |
1226 | case FD_CLOSE: |
f9d3f227 |
1227 | /* Signal a close on the socket. First read any outstanding data. */ |
32874aea |
1228 | open = 1; |
1229 | do { |
7440fd44 |
1230 | ret = p_recv(s->s, buf, sizeof(buf), 0); |
32874aea |
1231 | if (ret < 0) { |
7440fd44 |
1232 | err = p_WSAGetLastError(); |
32874aea |
1233 | if (err == WSAEWOULDBLOCK) |
1234 | break; |
1235 | return plug_closing(s->plug, winsock_error_string(err), |
1236 | err, 0); |
1237 | } else { |
1238 | if (ret) |
1239 | open &= plug_receive(s->plug, 0, buf, ret); |
1240 | else |
1241 | open &= plug_closing(s->plug, NULL, 0, 0); |
7e78000d |
1242 | } |
f9d3f227 |
1243 | } while (ret > 0); |
32874aea |
1244 | return open; |
d74d141c |
1245 | case FD_ACCEPT: |
1246 | { |
05581745 |
1247 | #ifdef NO_IPV6 |
bc4802a1 |
1248 | struct sockaddr_in isa; |
05581745 |
1249 | #else |
1250 | struct sockaddr_storage isa; |
1251 | #endif |
1252 | int addrlen = sizeof(isa); |
bcce45ed |
1253 | SOCKET t; /* socket of connection */ |
1254 | |
05581745 |
1255 | memset(&isa, 0, sizeof(isa)); |
bcce45ed |
1256 | err = 0; |
7440fd44 |
1257 | t = p_accept(s->s,(struct sockaddr *)&isa,&addrlen); |
bcce45ed |
1258 | if (t == INVALID_SOCKET) |
1259 | { |
7440fd44 |
1260 | err = p_WSAGetLastError(); |
bcce45ed |
1261 | if (err == WSATRY_AGAIN) |
1262 | break; |
1263 | } |
05581745 |
1264 | #ifndef NO_IPV6 |
1265 | if (isa.ss_family == AF_INET && |
1266 | s->localhost_only && |
1267 | !ipv4_is_local_addr(((struct sockaddr_in *)&isa)->sin_addr)) { |
1268 | #else |
a143ea0a |
1269 | if (s->localhost_only && !ipv4_is_local_addr(isa.sin_addr)) { |
05581745 |
1270 | #endif |
7440fd44 |
1271 | p_closesocket(t); /* dodgy WinSock let nonlocal through */ |
bc4802a1 |
1272 | } else if (plug_accepting(s->plug, (void*)t)) { |
7440fd44 |
1273 | p_closesocket(t); /* denied or error */ |
bcce45ed |
1274 | } |
d74d141c |
1275 | } |
2f75bae1 |
1276 | } |
1277 | |
1278 | return 1; |
1279 | } |
1280 | |
1281 | /* |
7732d38a |
1282 | * Deal with socket errors detected in try_send(). |
1283 | */ |
1284 | void net_pending_errors(void) |
1285 | { |
1286 | int i; |
1287 | Actual_Socket s; |
1288 | |
1289 | /* |
1290 | * This might be a fiddly business, because it's just possible |
1291 | * that handling a pending error on one socket might cause |
1292 | * others to be closed. (I can't think of any reason this might |
1293 | * happen in current SSH implementation, but to maintain |
1294 | * generality of this network layer I'll assume the worst.) |
1295 | * |
1296 | * So what we'll do is search the socket list for _one_ socket |
1297 | * with a pending error, and then handle it, and then search |
1298 | * the list again _from the beginning_. Repeat until we make a |
1299 | * pass with no socket errors present. That way we are |
1300 | * protected against the socket list changing under our feet. |
1301 | */ |
1302 | |
1303 | do { |
1304 | for (i = 0; (s = index234(sktree, i)) != NULL; i++) { |
1305 | if (s->pending_error) { |
1306 | /* |
1307 | * An error has occurred on this socket. Pass it to the |
1308 | * plug. |
1309 | */ |
1310 | plug_closing(s->plug, |
1311 | winsock_error_string(s->pending_error), |
1312 | s->pending_error, 0); |
1313 | break; |
1314 | } |
1315 | } |
1316 | } while (s); |
1317 | } |
1318 | |
1319 | /* |
2f75bae1 |
1320 | * Each socket abstraction contains a `void *' private field in |
1321 | * which the client can keep state. |
1322 | */ |
8eebd221 |
1323 | static void sk_tcp_set_private_ptr(Socket sock, void *ptr) |
32874aea |
1324 | { |
7e78000d |
1325 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1326 | s->private_ptr = ptr; |
1327 | } |
32874aea |
1328 | |
8eebd221 |
1329 | static void *sk_tcp_get_private_ptr(Socket sock) |
32874aea |
1330 | { |
7e78000d |
1331 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1332 | return s->private_ptr; |
1333 | } |
1334 | |
1335 | /* |
1336 | * Special error values are returned from sk_namelookup and sk_new |
1337 | * if there's a problem. These functions extract an error message, |
1338 | * or return NULL if there's no problem. |
1339 | */ |
cbe2d68f |
1340 | const char *sk_addr_error(SockAddr addr) |
32874aea |
1341 | { |
2f75bae1 |
1342 | return addr->error; |
1343 | } |
cbe2d68f |
1344 | static const char *sk_tcp_socket_error(Socket sock) |
32874aea |
1345 | { |
7e78000d |
1346 | Actual_Socket s = (Actual_Socket) sock; |
2f75bae1 |
1347 | return s->error; |
1348 | } |
1349 | |
8eebd221 |
1350 | static void sk_tcp_set_frozen(Socket sock, int is_frozen) |
d74d141c |
1351 | { |
1352 | Actual_Socket s = (Actual_Socket) sock; |
5471d09a |
1353 | if (s->frozen == is_frozen) |
1354 | return; |
d74d141c |
1355 | s->frozen = is_frozen; |
5471d09a |
1356 | if (!is_frozen && s->frozen_readable) { |
d74d141c |
1357 | char c; |
7440fd44 |
1358 | p_recv(s->s, &c, 1, MSG_PEEK); |
d74d141c |
1359 | } |
5471d09a |
1360 | s->frozen_readable = 0; |
d74d141c |
1361 | } |
1362 | |
2f75bae1 |
1363 | /* |
1364 | * For Plink: enumerate all sockets currently active. |
1365 | */ |
32874aea |
1366 | SOCKET first_socket(int *state) |
1367 | { |
d2371c81 |
1368 | Actual_Socket s; |
1369 | *state = 0; |
1370 | s = index234(sktree, (*state)++); |
2f75bae1 |
1371 | return s ? s->s : INVALID_SOCKET; |
1372 | } |
32874aea |
1373 | |
1374 | SOCKET next_socket(int *state) |
1375 | { |
d2371c81 |
1376 | Actual_Socket s = index234(sktree, (*state)++); |
2f75bae1 |
1377 | return s ? s->s : INVALID_SOCKET; |
1378 | } |
68a49acb |
1379 | |
39934deb |
1380 | extern int socket_writable(SOCKET skt) |
1381 | { |
1382 | Actual_Socket s = find234(sktree, (void *)skt, cmpforsearch); |
1383 | |
1384 | if (s) |
1385 | return bufchain_size(&s->output_data) > 0; |
1386 | else |
1387 | return 0; |
1388 | } |
1389 | |
68a49acb |
1390 | int net_service_lookup(char *service) |
1391 | { |
1392 | struct servent *se; |
7440fd44 |
1393 | se = p_getservbyname(service, NULL); |
68a49acb |
1394 | if (se != NULL) |
7440fd44 |
1395 | return p_ntohs(se->s_port); |
68a49acb |
1396 | else |
1397 | return 0; |
1398 | } |
fc0f17db |
1399 | |
1400 | SockAddr platform_get_x11_unix_address(int displaynum, char **canonicalname) |
1401 | { |
1402 | SockAddr ret = snew(struct SockAddr_tag); |
1403 | memset(ret, 0, sizeof(struct SockAddr_tag)); |
1404 | ret->error = "unix sockets not supported on this platform"; |
1405 | return ret; |
1406 | } |