| 1 | /* |
| 2 | * winsftp.c: the Windows-specific parts of PSFTP and PSCP. |
| 3 | */ |
| 4 | |
| 5 | #include <assert.h> |
| 6 | |
| 7 | #include "putty.h" |
| 8 | #include "psftp.h" |
| 9 | |
| 10 | /* ---------------------------------------------------------------------- |
| 11 | * Interface to GUI driver program. |
| 12 | */ |
| 13 | |
| 14 | /* This is just a base value from which the main message numbers are |
| 15 | * derived. */ |
| 16 | #define WM_APP_BASE 0x8000 |
| 17 | |
| 18 | /* These two pass a single character value in wParam. They represent |
| 19 | * the visible output from PSCP. */ |
| 20 | #define WM_STD_OUT_CHAR ( WM_APP_BASE+400 ) |
| 21 | #define WM_STD_ERR_CHAR ( WM_APP_BASE+401 ) |
| 22 | |
| 23 | /* These pass a transfer status update. WM_STATS_CHAR passes a single |
| 24 | * character in wParam, and is called repeatedly to pass the name of |
| 25 | * the file, terminated with "\n". WM_STATS_SIZE passes the size of |
| 26 | * the file being transferred in wParam. WM_STATS_ELAPSED is called |
| 27 | * to pass the elapsed time (in seconds) in wParam, and |
| 28 | * WM_STATS_PERCENT passes the percentage of the transfer which is |
| 29 | * complete, also in wParam. */ |
| 30 | #define WM_STATS_CHAR ( WM_APP_BASE+402 ) |
| 31 | #define WM_STATS_SIZE ( WM_APP_BASE+403 ) |
| 32 | #define WM_STATS_PERCENT ( WM_APP_BASE+404 ) |
| 33 | #define WM_STATS_ELAPSED ( WM_APP_BASE+405 ) |
| 34 | |
| 35 | /* These are used at the end of a run to pass an error code in |
| 36 | * wParam: zero means success, nonzero means failure. WM_RET_ERR_CNT |
| 37 | * is used after a copy, and WM_LS_RET_ERR_CNT is used after a file |
| 38 | * list operation. */ |
| 39 | #define WM_RET_ERR_CNT ( WM_APP_BASE+406 ) |
| 40 | #define WM_LS_RET_ERR_CNT ( WM_APP_BASE+407 ) |
| 41 | |
| 42 | /* More transfer status update messages. WM_STATS_DONE passes the |
| 43 | * number of bytes sent so far in wParam. WM_STATS_ETA passes the |
| 44 | * estimated time to completion (in seconds). WM_STATS_RATEBS passes |
| 45 | * the average transfer rate (in bytes per second). */ |
| 46 | #define WM_STATS_DONE ( WM_APP_BASE+408 ) |
| 47 | #define WM_STATS_ETA ( WM_APP_BASE+409 ) |
| 48 | #define WM_STATS_RATEBS ( WM_APP_BASE+410 ) |
| 49 | |
| 50 | #define NAME_STR_MAX 2048 |
| 51 | static char statname[NAME_STR_MAX + 1]; |
| 52 | static unsigned long statsize = 0; |
| 53 | static unsigned long statdone = 0; |
| 54 | static unsigned long stateta = 0; |
| 55 | static unsigned long statratebs = 0; |
| 56 | static int statperct = 0; |
| 57 | static unsigned long statelapsed = 0; |
| 58 | |
| 59 | static HWND gui_hwnd = NULL; |
| 60 | |
| 61 | static void send_msg(HWND h, UINT message, WPARAM wParam) |
| 62 | { |
| 63 | while (!PostMessage(h, message, wParam, 0)) |
| 64 | SleepEx(1000, TRUE); |
| 65 | } |
| 66 | |
| 67 | void gui_send_char(int is_stderr, int c) |
| 68 | { |
| 69 | unsigned int msg_id = WM_STD_OUT_CHAR; |
| 70 | if (is_stderr) |
| 71 | msg_id = WM_STD_ERR_CHAR; |
| 72 | send_msg(gui_hwnd, msg_id, (WPARAM) c); |
| 73 | } |
| 74 | |
| 75 | void gui_send_errcount(int list, int errs) |
| 76 | { |
| 77 | unsigned int msg_id = WM_RET_ERR_CNT; |
| 78 | if (list) |
| 79 | msg_id = WM_LS_RET_ERR_CNT; |
| 80 | while (!PostMessage(gui_hwnd, msg_id, (WPARAM) errs, 0)) |
| 81 | SleepEx(1000, TRUE); |
| 82 | } |
| 83 | |
| 84 | void gui_update_stats(char *name, unsigned long size, |
| 85 | int percentage, unsigned long elapsed, |
| 86 | unsigned long done, unsigned long eta, |
| 87 | unsigned long ratebs) |
| 88 | { |
| 89 | unsigned int i; |
| 90 | |
| 91 | if (strcmp(name, statname) != 0) { |
| 92 | for (i = 0; i < strlen(name); ++i) |
| 93 | send_msg(gui_hwnd, WM_STATS_CHAR, (WPARAM) name[i]); |
| 94 | send_msg(gui_hwnd, WM_STATS_CHAR, (WPARAM) '\n'); |
| 95 | strcpy(statname, name); |
| 96 | } |
| 97 | if (statsize != size) { |
| 98 | send_msg(gui_hwnd, WM_STATS_SIZE, (WPARAM) size); |
| 99 | statsize = size; |
| 100 | } |
| 101 | if (statdone != done) { |
| 102 | send_msg(gui_hwnd, WM_STATS_DONE, (WPARAM) done); |
| 103 | statdone = done; |
| 104 | } |
| 105 | if (stateta != eta) { |
| 106 | send_msg(gui_hwnd, WM_STATS_ETA, (WPARAM) eta); |
| 107 | stateta = eta; |
| 108 | } |
| 109 | if (statratebs != ratebs) { |
| 110 | send_msg(gui_hwnd, WM_STATS_RATEBS, (WPARAM) ratebs); |
| 111 | statratebs = ratebs; |
| 112 | } |
| 113 | if (statelapsed != elapsed) { |
| 114 | send_msg(gui_hwnd, WM_STATS_ELAPSED, (WPARAM) elapsed); |
| 115 | statelapsed = elapsed; |
| 116 | } |
| 117 | if (statperct != percentage) { |
| 118 | send_msg(gui_hwnd, WM_STATS_PERCENT, (WPARAM) percentage); |
| 119 | statperct = percentage; |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | void gui_enable(char *arg) |
| 124 | { |
| 125 | gui_hwnd = (HWND) atoi(arg); |
| 126 | } |
| 127 | |
| 128 | /* ---------------------------------------------------------------------- |
| 129 | * File access abstraction. |
| 130 | */ |
| 131 | |
| 132 | /* |
| 133 | * Set local current directory. Returns NULL on success, or else an |
| 134 | * error message which must be freed after printing. |
| 135 | */ |
| 136 | char *psftp_lcd(char *dir) |
| 137 | { |
| 138 | char *ret = NULL; |
| 139 | |
| 140 | if (!SetCurrentDirectory(dir)) { |
| 141 | LPVOID message; |
| 142 | int i; |
| 143 | FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | |
| 144 | FORMAT_MESSAGE_FROM_SYSTEM | |
| 145 | FORMAT_MESSAGE_IGNORE_INSERTS, |
| 146 | NULL, GetLastError(), |
| 147 | MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), |
| 148 | (LPTSTR)&message, 0, NULL); |
| 149 | i = strcspn((char *)message, "\n"); |
| 150 | ret = dupprintf("%.*s", i, (LPCTSTR)message); |
| 151 | LocalFree(message); |
| 152 | } |
| 153 | |
| 154 | return ret; |
| 155 | } |
| 156 | |
| 157 | /* |
| 158 | * Get local current directory. Returns a string which must be |
| 159 | * freed. |
| 160 | */ |
| 161 | char *psftp_getcwd(void) |
| 162 | { |
| 163 | char *ret = snewn(256, char); |
| 164 | int len = GetCurrentDirectory(256, ret); |
| 165 | if (len > 256) |
| 166 | ret = sresize(ret, len, char); |
| 167 | GetCurrentDirectory(len, ret); |
| 168 | return ret; |
| 169 | } |
| 170 | |
| 171 | #define TIME_POSIX_TO_WIN(t, ft) (*(LONGLONG*)&(ft) = \ |
| 172 | ((LONGLONG) (t) + (LONGLONG) 11644473600) * (LONGLONG) 10000000) |
| 173 | #define TIME_WIN_TO_POSIX(ft, t) ((t) = (unsigned long) \ |
| 174 | ((*(LONGLONG*)&(ft)) / (LONGLONG) 10000000 - (LONGLONG) 11644473600)) |
| 175 | |
| 176 | struct RFile { |
| 177 | HANDLE h; |
| 178 | }; |
| 179 | |
| 180 | RFile *open_existing_file(char *name, unsigned long *size, |
| 181 | unsigned long *mtime, unsigned long *atime) |
| 182 | { |
| 183 | HANDLE h; |
| 184 | RFile *ret; |
| 185 | |
| 186 | h = CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL, |
| 187 | OPEN_EXISTING, 0, 0); |
| 188 | if (h == INVALID_HANDLE_VALUE) |
| 189 | return NULL; |
| 190 | |
| 191 | ret = snew(RFile); |
| 192 | ret->h = h; |
| 193 | |
| 194 | if (size) |
| 195 | *size = GetFileSize(h, NULL); |
| 196 | |
| 197 | if (mtime || atime) { |
| 198 | FILETIME actime, wrtime; |
| 199 | GetFileTime(h, NULL, &actime, &wrtime); |
| 200 | if (atime) |
| 201 | TIME_WIN_TO_POSIX(actime, *atime); |
| 202 | if (mtime) |
| 203 | TIME_WIN_TO_POSIX(wrtime, *mtime); |
| 204 | } |
| 205 | |
| 206 | return ret; |
| 207 | } |
| 208 | |
| 209 | int read_from_file(RFile *f, void *buffer, int length) |
| 210 | { |
| 211 | int ret, read; |
| 212 | ret = ReadFile(f->h, buffer, length, &read, NULL); |
| 213 | if (!ret) |
| 214 | return -1; /* error */ |
| 215 | else |
| 216 | return read; |
| 217 | } |
| 218 | |
| 219 | void close_rfile(RFile *f) |
| 220 | { |
| 221 | CloseHandle(f->h); |
| 222 | sfree(f); |
| 223 | } |
| 224 | |
| 225 | struct WFile { |
| 226 | HANDLE h; |
| 227 | }; |
| 228 | |
| 229 | WFile *open_new_file(char *name) |
| 230 | { |
| 231 | HANDLE h; |
| 232 | WFile *ret; |
| 233 | |
| 234 | h = CreateFile(name, GENERIC_WRITE, 0, NULL, |
| 235 | CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0); |
| 236 | if (h == INVALID_HANDLE_VALUE) |
| 237 | return NULL; |
| 238 | |
| 239 | ret = snew(WFile); |
| 240 | ret->h = h; |
| 241 | |
| 242 | return ret; |
| 243 | } |
| 244 | |
| 245 | int write_to_file(WFile *f, void *buffer, int length) |
| 246 | { |
| 247 | int ret, written; |
| 248 | ret = WriteFile(f->h, buffer, length, &written, NULL); |
| 249 | if (!ret) |
| 250 | return -1; /* error */ |
| 251 | else |
| 252 | return written; |
| 253 | } |
| 254 | |
| 255 | void set_file_times(WFile *f, unsigned long mtime, unsigned long atime) |
| 256 | { |
| 257 | FILETIME actime, wrtime; |
| 258 | TIME_POSIX_TO_WIN(atime, actime); |
| 259 | TIME_POSIX_TO_WIN(mtime, wrtime); |
| 260 | SetFileTime(f->h, NULL, &actime, &wrtime); |
| 261 | } |
| 262 | |
| 263 | void close_wfile(WFile *f) |
| 264 | { |
| 265 | CloseHandle(f->h); |
| 266 | sfree(f); |
| 267 | } |
| 268 | |
| 269 | int file_type(char *name) |
| 270 | { |
| 271 | DWORD attr; |
| 272 | attr = GetFileAttributes(name); |
| 273 | /* We know of no `weird' files under Windows. */ |
| 274 | if (attr == (DWORD)-1) |
| 275 | return FILE_TYPE_NONEXISTENT; |
| 276 | else if (attr & FILE_ATTRIBUTE_DIRECTORY) |
| 277 | return FILE_TYPE_DIRECTORY; |
| 278 | else |
| 279 | return FILE_TYPE_FILE; |
| 280 | } |
| 281 | |
| 282 | struct DirHandle { |
| 283 | HANDLE h; |
| 284 | char *name; |
| 285 | }; |
| 286 | |
| 287 | DirHandle *open_directory(char *name) |
| 288 | { |
| 289 | HANDLE h; |
| 290 | WIN32_FIND_DATA fdat; |
| 291 | char *findfile; |
| 292 | DirHandle *ret; |
| 293 | |
| 294 | /* Enumerate files in dir `foo'. */ |
| 295 | findfile = dupcat(name, "/*", NULL); |
| 296 | h = FindFirstFile(findfile, &fdat); |
| 297 | if (h == INVALID_HANDLE_VALUE) |
| 298 | return NULL; |
| 299 | sfree(findfile); |
| 300 | |
| 301 | ret = snew(DirHandle); |
| 302 | ret->h = h; |
| 303 | ret->name = dupstr(fdat.cFileName); |
| 304 | return ret; |
| 305 | } |
| 306 | |
| 307 | char *read_filename(DirHandle *dir) |
| 308 | { |
| 309 | while (!dir->name) { |
| 310 | WIN32_FIND_DATA fdat; |
| 311 | int ok = FindNextFile(dir->h, &fdat); |
| 312 | |
| 313 | if (!ok) |
| 314 | return NULL; |
| 315 | |
| 316 | if (fdat.cFileName[0] == '.' && |
| 317 | (fdat.cFileName[1] == '\0' || |
| 318 | (fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0'))) |
| 319 | dir->name = NULL; |
| 320 | else |
| 321 | dir->name = dupstr(fdat.cFileName); |
| 322 | } |
| 323 | |
| 324 | if (dir->name) { |
| 325 | char *ret = dir->name; |
| 326 | dir->name = NULL; |
| 327 | return ret; |
| 328 | } else |
| 329 | return NULL; |
| 330 | } |
| 331 | |
| 332 | void close_directory(DirHandle *dir) |
| 333 | { |
| 334 | FindClose(dir->h); |
| 335 | if (dir->name) |
| 336 | sfree(dir->name); |
| 337 | sfree(dir); |
| 338 | } |
| 339 | |
| 340 | int test_wildcard(char *name, int cmdline) |
| 341 | { |
| 342 | HANDLE fh; |
| 343 | WIN32_FIND_DATA fdat; |
| 344 | |
| 345 | /* First see if the exact name exists. */ |
| 346 | if (GetFileAttributes(name) != (DWORD)-1) |
| 347 | return WCTYPE_FILENAME; |
| 348 | |
| 349 | /* Otherwise see if a wildcard match finds anything. */ |
| 350 | fh = FindFirstFile(name, &fdat); |
| 351 | if (fh == INVALID_HANDLE_VALUE) |
| 352 | return WCTYPE_NONEXISTENT; |
| 353 | |
| 354 | FindClose(fh); |
| 355 | return WCTYPE_WILDCARD; |
| 356 | } |
| 357 | |
| 358 | struct WildcardMatcher { |
| 359 | HANDLE h; |
| 360 | char *name; |
| 361 | char *srcpath; |
| 362 | }; |
| 363 | |
| 364 | /* |
| 365 | * Return a pointer to the portion of str that comes after the last |
| 366 | * slash (or backslash or colon, if `local' is TRUE). |
| 367 | */ |
| 368 | static char *stripslashes(char *str, int local) |
| 369 | { |
| 370 | char *p; |
| 371 | |
| 372 | if (local) { |
| 373 | p = strchr(str, ':'); |
| 374 | if (p) str = p+1; |
| 375 | } |
| 376 | |
| 377 | p = strrchr(str, '/'); |
| 378 | if (p) str = p+1; |
| 379 | |
| 380 | if (local) { |
| 381 | p = strrchr(str, '\\'); |
| 382 | if (p) str = p+1; |
| 383 | } |
| 384 | |
| 385 | return str; |
| 386 | } |
| 387 | |
| 388 | WildcardMatcher *begin_wildcard_matching(char *name) |
| 389 | { |
| 390 | HANDLE h; |
| 391 | WIN32_FIND_DATA fdat; |
| 392 | WildcardMatcher *ret; |
| 393 | char *last; |
| 394 | |
| 395 | h = FindFirstFile(name, &fdat); |
| 396 | if (h == INVALID_HANDLE_VALUE) |
| 397 | return NULL; |
| 398 | |
| 399 | ret = snew(WildcardMatcher); |
| 400 | ret->h = h; |
| 401 | ret->srcpath = dupstr(name); |
| 402 | last = stripslashes(ret->srcpath, 1); |
| 403 | *last = '\0'; |
| 404 | if (fdat.cFileName[0] == '.' && |
| 405 | (fdat.cFileName[1] == '\0' || |
| 406 | (fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0'))) |
| 407 | ret->name = NULL; |
| 408 | else |
| 409 | ret->name = dupcat(ret->srcpath, fdat.cFileName, NULL); |
| 410 | |
| 411 | return ret; |
| 412 | } |
| 413 | |
| 414 | char *wildcard_get_filename(WildcardMatcher *dir) |
| 415 | { |
| 416 | while (!dir->name) { |
| 417 | WIN32_FIND_DATA fdat; |
| 418 | int ok = FindNextFile(dir->h, &fdat); |
| 419 | |
| 420 | if (!ok) |
| 421 | return NULL; |
| 422 | |
| 423 | if (fdat.cFileName[0] == '.' && |
| 424 | (fdat.cFileName[1] == '\0' || |
| 425 | (fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0'))) |
| 426 | dir->name = NULL; |
| 427 | else |
| 428 | dir->name = dupcat(dir->srcpath, fdat.cFileName, NULL); |
| 429 | } |
| 430 | |
| 431 | if (dir->name) { |
| 432 | char *ret = dir->name; |
| 433 | dir->name = NULL; |
| 434 | return ret; |
| 435 | } else |
| 436 | return NULL; |
| 437 | } |
| 438 | |
| 439 | void finish_wildcard_matching(WildcardMatcher *dir) |
| 440 | { |
| 441 | FindClose(dir->h); |
| 442 | if (dir->name) |
| 443 | sfree(dir->name); |
| 444 | sfree(dir->srcpath); |
| 445 | sfree(dir); |
| 446 | } |
| 447 | |
| 448 | int vet_filename(char *name) |
| 449 | { |
| 450 | if (strchr(name, '/') || strchr(name, '\\') || strchr(name, ':')) |
| 451 | return FALSE; |
| 452 | |
| 453 | if (!name[strspn(name, ".")]) /* entirely composed of dots */ |
| 454 | return FALSE; |
| 455 | |
| 456 | return TRUE; |
| 457 | } |
| 458 | |
| 459 | int create_directory(char *name) |
| 460 | { |
| 461 | return CreateDirectory(name, NULL) != 0; |
| 462 | } |
| 463 | |
| 464 | char *dir_file_cat(char *dir, char *file) |
| 465 | { |
| 466 | return dupcat(dir, "\\", file, NULL); |
| 467 | } |
| 468 | |
| 469 | /* ---------------------------------------------------------------------- |
| 470 | * Platform-specific network handling. |
| 471 | */ |
| 472 | |
| 473 | /* |
| 474 | * Be told what socket we're supposed to be using. |
| 475 | */ |
| 476 | static SOCKET sftp_ssh_socket = INVALID_SOCKET; |
| 477 | static HANDLE netevent = NULL; |
| 478 | char *do_select(SOCKET skt, int startup) |
| 479 | { |
| 480 | int events; |
| 481 | if (startup) |
| 482 | sftp_ssh_socket = skt; |
| 483 | else |
| 484 | sftp_ssh_socket = INVALID_SOCKET; |
| 485 | |
| 486 | if (p_WSAEventSelect) { |
| 487 | if (startup) { |
| 488 | events = (FD_CONNECT | FD_READ | FD_WRITE | |
| 489 | FD_OOB | FD_CLOSE | FD_ACCEPT); |
| 490 | netevent = CreateEvent(NULL, FALSE, FALSE, NULL); |
| 491 | } else { |
| 492 | events = 0; |
| 493 | } |
| 494 | if (p_WSAEventSelect(skt, netevent, events) == SOCKET_ERROR) { |
| 495 | switch (p_WSAGetLastError()) { |
| 496 | case WSAENETDOWN: |
| 497 | return "Network is down"; |
| 498 | default: |
| 499 | return "WSAEventSelect(): unknown error"; |
| 500 | } |
| 501 | } |
| 502 | } |
| 503 | return NULL; |
| 504 | } |
| 505 | extern int select_result(WPARAM, LPARAM); |
| 506 | |
| 507 | int do_eventsel_loop(HANDLE other_event) |
| 508 | { |
| 509 | int n; |
| 510 | long next, ticks; |
| 511 | HANDLE handles[2]; |
| 512 | SOCKET *sklist; |
| 513 | int skcount; |
| 514 | long now = GETTICKCOUNT(); |
| 515 | |
| 516 | if (!netevent) { |
| 517 | return -1; /* doom */ |
| 518 | } |
| 519 | |
| 520 | handles[0] = netevent; |
| 521 | handles[1] = other_event; |
| 522 | |
| 523 | if (run_timers(now, &next)) { |
| 524 | ticks = next - GETTICKCOUNT(); |
| 525 | if (ticks < 0) ticks = 0; /* just in case */ |
| 526 | } else { |
| 527 | ticks = INFINITE; |
| 528 | } |
| 529 | |
| 530 | n = MsgWaitForMultipleObjects(other_event ? 2 : 1, handles, FALSE, ticks, |
| 531 | QS_POSTMESSAGE); |
| 532 | |
| 533 | if (n == WAIT_OBJECT_0 + 0) { |
| 534 | WSANETWORKEVENTS things; |
| 535 | SOCKET socket; |
| 536 | extern SOCKET first_socket(int *), next_socket(int *); |
| 537 | extern int select_result(WPARAM, LPARAM); |
| 538 | int i, socketstate; |
| 539 | |
| 540 | /* |
| 541 | * We must not call select_result() for any socket |
| 542 | * until we have finished enumerating within the |
| 543 | * tree. This is because select_result() may close |
| 544 | * the socket and modify the tree. |
| 545 | */ |
| 546 | /* Count the active sockets. */ |
| 547 | i = 0; |
| 548 | for (socket = first_socket(&socketstate); |
| 549 | socket != INVALID_SOCKET; |
| 550 | socket = next_socket(&socketstate)) i++; |
| 551 | |
| 552 | /* Expand the buffer if necessary. */ |
| 553 | sklist = snewn(i, SOCKET); |
| 554 | |
| 555 | /* Retrieve the sockets into sklist. */ |
| 556 | skcount = 0; |
| 557 | for (socket = first_socket(&socketstate); |
| 558 | socket != INVALID_SOCKET; |
| 559 | socket = next_socket(&socketstate)) { |
| 560 | sklist[skcount++] = socket; |
| 561 | } |
| 562 | |
| 563 | /* Now we're done enumerating; go through the list. */ |
| 564 | for (i = 0; i < skcount; i++) { |
| 565 | WPARAM wp; |
| 566 | socket = sklist[i]; |
| 567 | wp = (WPARAM) socket; |
| 568 | if (!p_WSAEnumNetworkEvents(socket, NULL, &things)) { |
| 569 | static const struct { int bit, mask; } eventtypes[] = { |
| 570 | {FD_CONNECT_BIT, FD_CONNECT}, |
| 571 | {FD_READ_BIT, FD_READ}, |
| 572 | {FD_CLOSE_BIT, FD_CLOSE}, |
| 573 | {FD_OOB_BIT, FD_OOB}, |
| 574 | {FD_WRITE_BIT, FD_WRITE}, |
| 575 | {FD_ACCEPT_BIT, FD_ACCEPT}, |
| 576 | }; |
| 577 | int e; |
| 578 | |
| 579 | noise_ultralight(socket); |
| 580 | noise_ultralight(things.lNetworkEvents); |
| 581 | |
| 582 | for (e = 0; e < lenof(eventtypes); e++) |
| 583 | if (things.lNetworkEvents & eventtypes[e].mask) { |
| 584 | LPARAM lp; |
| 585 | int err = things.iErrorCode[eventtypes[e].bit]; |
| 586 | lp = WSAMAKESELECTREPLY(eventtypes[e].mask, err); |
| 587 | select_result(wp, lp); |
| 588 | } |
| 589 | } |
| 590 | } |
| 591 | |
| 592 | sfree(sklist); |
| 593 | } |
| 594 | |
| 595 | if (n == WAIT_TIMEOUT) { |
| 596 | now = next; |
| 597 | } else { |
| 598 | now = GETTICKCOUNT(); |
| 599 | } |
| 600 | |
| 601 | if (other_event && n == WAIT_OBJECT_0 + 1) |
| 602 | return 1; |
| 603 | |
| 604 | return 0; |
| 605 | } |
| 606 | |
| 607 | /* |
| 608 | * Wait for some network data and process it. |
| 609 | * |
| 610 | * We have two variants of this function. One uses select() so that |
| 611 | * it's compatible with WinSock 1. The other uses WSAEventSelect |
| 612 | * and MsgWaitForMultipleObjects, so that we can consistently use |
| 613 | * WSAEventSelect throughout; this enables us to also implement |
| 614 | * ssh_sftp_get_cmdline() using a parallel mechanism. |
| 615 | */ |
| 616 | int ssh_sftp_loop_iteration(void) |
| 617 | { |
| 618 | if (sftp_ssh_socket == INVALID_SOCKET) |
| 619 | return -1; /* doom */ |
| 620 | |
| 621 | if (p_WSAEventSelect == NULL) { |
| 622 | fd_set readfds; |
| 623 | int ret; |
| 624 | long now = GETTICKCOUNT(); |
| 625 | |
| 626 | if (socket_writable(sftp_ssh_socket)) |
| 627 | select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_WRITE); |
| 628 | |
| 629 | do { |
| 630 | long next, ticks; |
| 631 | struct timeval tv, *ptv; |
| 632 | |
| 633 | if (run_timers(now, &next)) { |
| 634 | ticks = next - GETTICKCOUNT(); |
| 635 | if (ticks <= 0) |
| 636 | ticks = 1; /* just in case */ |
| 637 | tv.tv_sec = ticks / 1000; |
| 638 | tv.tv_usec = ticks % 1000 * 1000; |
| 639 | ptv = &tv; |
| 640 | } else { |
| 641 | ptv = NULL; |
| 642 | } |
| 643 | |
| 644 | FD_ZERO(&readfds); |
| 645 | FD_SET(sftp_ssh_socket, &readfds); |
| 646 | ret = p_select(1, &readfds, NULL, NULL, ptv); |
| 647 | |
| 648 | if (ret < 0) |
| 649 | return -1; /* doom */ |
| 650 | else if (ret == 0) |
| 651 | now = next; |
| 652 | else |
| 653 | now = GETTICKCOUNT(); |
| 654 | |
| 655 | } while (ret == 0); |
| 656 | |
| 657 | select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ); |
| 658 | |
| 659 | return 0; |
| 660 | } else { |
| 661 | return do_eventsel_loop(NULL); |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | /* |
| 666 | * Read a command line from standard input. |
| 667 | * |
| 668 | * In the presence of WinSock 2, we can use WSAEventSelect to |
| 669 | * mediate between the socket and stdin, meaning we can send |
| 670 | * keepalives and respond to server events even while waiting at |
| 671 | * the PSFTP command prompt. Without WS2, we fall back to a simple |
| 672 | * fgets. |
| 673 | */ |
| 674 | struct command_read_ctx { |
| 675 | HANDLE event; |
| 676 | char *line; |
| 677 | }; |
| 678 | |
| 679 | static DWORD WINAPI command_read_thread(void *param) |
| 680 | { |
| 681 | struct command_read_ctx *ctx = (struct command_read_ctx *) param; |
| 682 | |
| 683 | ctx->line = fgetline(stdin); |
| 684 | |
| 685 | SetEvent(ctx->event); |
| 686 | |
| 687 | return 0; |
| 688 | } |
| 689 | |
| 690 | char *ssh_sftp_get_cmdline(char *prompt, int no_fds_ok) |
| 691 | { |
| 692 | int ret; |
| 693 | struct command_read_ctx actx, *ctx = &actx; |
| 694 | DWORD threadid; |
| 695 | |
| 696 | fputs(prompt, stdout); |
| 697 | fflush(stdout); |
| 698 | |
| 699 | if ((sftp_ssh_socket == INVALID_SOCKET && no_fds_ok) || |
| 700 | p_WSAEventSelect == NULL) { |
| 701 | return fgetline(stdin); /* very simple */ |
| 702 | } |
| 703 | |
| 704 | /* |
| 705 | * Create a second thread to read from stdin. Process network |
| 706 | * and timing events until it terminates. |
| 707 | */ |
| 708 | ctx->event = CreateEvent(NULL, FALSE, FALSE, NULL); |
| 709 | ctx->line = NULL; |
| 710 | |
| 711 | if (!CreateThread(NULL, 0, command_read_thread, |
| 712 | ctx, 0, &threadid)) { |
| 713 | fprintf(stderr, "Unable to create command input thread\n"); |
| 714 | cleanup_exit(1); |
| 715 | } |
| 716 | |
| 717 | do { |
| 718 | ret = do_eventsel_loop(ctx->event); |
| 719 | |
| 720 | /* Error return can only occur if netevent==NULL, and it ain't. */ |
| 721 | assert(ret >= 0); |
| 722 | } while (ret == 0); |
| 723 | |
| 724 | return ctx->line; |
| 725 | } |
| 726 | |
| 727 | /* ---------------------------------------------------------------------- |
| 728 | * Main program. Parse arguments etc. |
| 729 | */ |
| 730 | int main(int argc, char *argv[]) |
| 731 | { |
| 732 | int ret; |
| 733 | |
| 734 | ret = psftp_main(argc, argv); |
| 735 | |
| 736 | return ret; |
| 737 | } |