[u/mdw/putty] / windows / winsftp.c

/*
 * winsftp.c: the Windows-specific parts of PSFTP and PSCP.
 */

#include <assert.h>

#include "putty.h"
#include "psftp.h"

/* ----------------------------------------------------------------------
 * Interface to GUI driver program.
 */

/* This is just a base value from which the main message numbers are
 * derived. */
#define   WM_APP_BASE		0x8000

/* These two pass a single character value in wParam. They represent
 * the visible output from PSCP. */
#define   WM_STD_OUT_CHAR	( WM_APP_BASE+400 )
#define   WM_STD_ERR_CHAR	( WM_APP_BASE+401 )

/* These pass a transfer status update. WM_STATS_CHAR passes a single
 * character in wParam, and is called repeatedly to pass the name of
 * the file, terminated with "\n". WM_STATS_SIZE passes the size of
 * the file being transferred in wParam. WM_STATS_ELAPSED is called
 * to pass the elapsed time (in seconds) in wParam, and
 * WM_STATS_PERCENT passes the percentage of the transfer which is
 * complete, also in wParam. */
#define   WM_STATS_CHAR		( WM_APP_BASE+402 )
#define   WM_STATS_SIZE 	( WM_APP_BASE+403 )
#define   WM_STATS_PERCENT	( WM_APP_BASE+404 )
#define   WM_STATS_ELAPSED	( WM_APP_BASE+405 )

/* These are used at the end of a run to pass an error code in
 * wParam: zero means success, nonzero means failure. WM_RET_ERR_CNT
 * is used after a copy, and WM_LS_RET_ERR_CNT is used after a file
 * list operation. */
#define   WM_RET_ERR_CNT	( WM_APP_BASE+406 )
#define   WM_LS_RET_ERR_CNT	( WM_APP_BASE+407 )

/* More transfer status update messages. WM_STATS_DONE passes the
 * number of bytes sent so far in wParam. WM_STATS_ETA passes the
 * estimated time to completion (in seconds). WM_STATS_RATEBS passes
 * the average transfer rate (in bytes per second). */
#define   WM_STATS_DONE		( WM_APP_BASE+408 )
#define   WM_STATS_ETA		( WM_APP_BASE+409 )
#define   WM_STATS_RATEBS	( WM_APP_BASE+410 )

#define NAME_STR_MAX 2048
static char statname[NAME_STR_MAX + 1];
static unsigned long statsize = 0;
static unsigned long statdone = 0;
static unsigned long stateta = 0;
static unsigned long statratebs = 0;
static int statperct = 0;
static unsigned long statelapsed = 0;

static HWND gui_hwnd = NULL;

static void send_msg(HWND h, UINT message, WPARAM wParam)
{
    while (!PostMessage(h, message, wParam, 0))
	SleepEx(1000, TRUE);
}

void gui_send_char(int is_stderr, int c)
{
    unsigned int msg_id = WM_STD_OUT_CHAR;
    if (is_stderr)
	msg_id = WM_STD_ERR_CHAR;
    send_msg(gui_hwnd, msg_id, (WPARAM) c);
}

void gui_send_errcount(int list, int errs)
{
    unsigned int msg_id = WM_RET_ERR_CNT;
    if (list)
	msg_id = WM_LS_RET_ERR_CNT;
    while (!PostMessage(gui_hwnd, msg_id, (WPARAM) errs, 0))
	SleepEx(1000, TRUE);
}

void gui_update_stats(char *name, unsigned long size,
		      int percentage, unsigned long elapsed,
		      unsigned long done, unsigned long eta,
		      unsigned long ratebs)
{
    unsigned int i;

    if (strcmp(name, statname) != 0) {
	for (i = 0; i < strlen(name); ++i)
	    send_msg(gui_hwnd, WM_STATS_CHAR, (WPARAM) name[i]);
	send_msg(gui_hwnd, WM_STATS_CHAR, (WPARAM) '\n');
	strcpy(statname, name);
    }
    if (statsize != size) {
	send_msg(gui_hwnd, WM_STATS_SIZE, (WPARAM) size);
	statsize = size;
    }
    if (statdone != done) {
	send_msg(gui_hwnd, WM_STATS_DONE, (WPARAM) done);
	statdone = done;
    }
    if (stateta != eta) {
	send_msg(gui_hwnd, WM_STATS_ETA, (WPARAM) eta);
	stateta = eta;
    }
    if (statratebs != ratebs) {
	send_msg(gui_hwnd, WM_STATS_RATEBS, (WPARAM) ratebs);
	statratebs = ratebs;
    }
    if (statelapsed != elapsed) {
	send_msg(gui_hwnd, WM_STATS_ELAPSED, (WPARAM) elapsed);
	statelapsed = elapsed;
    }
    if (statperct != percentage) {
	send_msg(gui_hwnd, WM_STATS_PERCENT, (WPARAM) percentage);
	statperct = percentage;
    }
}

void gui_enable(char *arg)
{
    gui_hwnd = (HWND) atoi(arg);
}

/* ----------------------------------------------------------------------
 * File access abstraction.
 */

/*
 * Set local current directory. Returns NULL on success, or else an
 * error message which must be freed after printing.
 */
char *psftp_lcd(char *dir)
{
    char *ret = NULL;

    if (!SetCurrentDirectory(dir)) {
	LPVOID message;
	int i;
	FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
		      FORMAT_MESSAGE_FROM_SYSTEM |
		      FORMAT_MESSAGE_IGNORE_INSERTS,
		      NULL, GetLastError(),
		      MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
		      (LPTSTR)&message, 0, NULL);
	i = strcspn((char *)message, "\n");
	ret = dupprintf("%.*s", i, (LPCTSTR)message);
	LocalFree(message);
    }

    return ret;
}

/*
 * Get local current directory. Returns a string which must be
 * freed.
 */
char *psftp_getcwd(void)
{
    char *ret = snewn(256, char);
    int len = GetCurrentDirectory(256, ret);
    if (len > 256)
	ret = sresize(ret, len, char);
    GetCurrentDirectory(len, ret);
    return ret;
}

#define TIME_POSIX_TO_WIN(t, ft) (*(LONGLONG*)&(ft) = \
	((LONGLONG) (t) + (LONGLONG) 11644473600) * (LONGLONG) 10000000)
#define TIME_WIN_TO_POSIX(ft, t) ((t) = (unsigned long) \
	((*(LONGLONG*)&(ft)) / (LONGLONG) 10000000 - (LONGLONG) 11644473600))

struct RFile {
    HANDLE h;
};

RFile *open_existing_file(char *name, unsigned long *size,
			  unsigned long *mtime, unsigned long *atime)
{
    HANDLE h;
    RFile *ret;

    h = CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL,
		   OPEN_EXISTING, 0, 0);
    if (h == INVALID_HANDLE_VALUE)
	return NULL;

    ret = snew(RFile);
    ret->h = h;

    if (size)
	*size = GetFileSize(h, NULL);

    if (mtime || atime) {
	FILETIME actime, wrtime;
	GetFileTime(h, NULL, &actime, &wrtime);
	if (atime)
	    TIME_WIN_TO_POSIX(actime, *atime);
	if (mtime)
	    TIME_WIN_TO_POSIX(wrtime, *mtime);
    }

    return ret;
}

int read_from_file(RFile *f, void *buffer, int length)
{
    int ret, read;
    ret = ReadFile(f->h, buffer, length, &read, NULL);
    if (!ret)
	return -1;		       /* error */
    else
	return read;
}

void close_rfile(RFile *f)
{
    CloseHandle(f->h);
    sfree(f);
}

struct WFile {
    HANDLE h;
};

WFile *open_new_file(char *name)
{
    HANDLE h;
    WFile *ret;

    h = CreateFile(name, GENERIC_WRITE, 0, NULL,
		   CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
    if (h == INVALID_HANDLE_VALUE)
	return NULL;

    ret = snew(WFile);
    ret->h = h;

    return ret;
}

int write_to_file(WFile *f, void *buffer, int length)
{
    int ret, written;
    ret = WriteFile(f->h, buffer, length, &written, NULL);
    if (!ret)
	return -1;		       /* error */
    else
	return written;
}

void set_file_times(WFile *f, unsigned long mtime, unsigned long atime)
{
    FILETIME actime, wrtime;
    TIME_POSIX_TO_WIN(atime, actime);
    TIME_POSIX_TO_WIN(mtime, wrtime);
    SetFileTime(f->h, NULL, &actime, &wrtime);
}

void close_wfile(WFile *f)
{
    CloseHandle(f->h);
    sfree(f);
}

int file_type(char *name)
{
    DWORD attr;
    attr = GetFileAttributes(name);
    /* We know of no `weird' files under Windows. */
    if (attr == (DWORD)-1)
	return FILE_TYPE_NONEXISTENT;
    else if (attr & FILE_ATTRIBUTE_DIRECTORY)
	return FILE_TYPE_DIRECTORY;
    else
	return FILE_TYPE_FILE;
}

struct DirHandle {
    HANDLE h;
    char *name;
};

DirHandle *open_directory(char *name)
{
    HANDLE h;
    WIN32_FIND_DATA fdat;
    char *findfile;
    DirHandle *ret;

    /* Enumerate files in dir `foo'. */
    findfile = dupcat(name, "/*", NULL);
    h = FindFirstFile(findfile, &fdat);
    if (h == INVALID_HANDLE_VALUE)
	return NULL;
    sfree(findfile);

    ret = snew(DirHandle);
    ret->h = h;
    ret->name = dupstr(fdat.cFileName);
    return ret;
}

char *read_filename(DirHandle *dir)
{
    do {

	if (!dir->name) {
	    WIN32_FIND_DATA fdat;
	    int ok = FindNextFile(dir->h, &fdat);
	    if (!ok)
		return NULL;
	    else
		dir->name = dupstr(fdat.cFileName);
	}

	assert(dir->name);
	if (dir->name[0] == '.' &&
	    (dir->name[1] == '\0' ||
	     (dir->name[1] == '.' && dir->name[2] == '\0'))) {
	    sfree(dir->name);
	    dir->name = NULL;
	}

    } while (!dir->name);

    if (dir->name) {
	char *ret = dir->name;
	dir->name = NULL;
	return ret;
    } else
	return NULL;
}

void close_directory(DirHandle *dir)
{
    FindClose(dir->h);
    if (dir->name)
	sfree(dir->name);
    sfree(dir);
}

int test_wildcard(char *name, int cmdline)
{
    HANDLE fh;
    WIN32_FIND_DATA fdat;

    /* First see if the exact name exists. */
    if (GetFileAttributes(name) != (DWORD)-1)
	return WCTYPE_FILENAME;

    /* Otherwise see if a wildcard match finds anything. */
    fh = FindFirstFile(name, &fdat);
    if (fh == INVALID_HANDLE_VALUE)
	return WCTYPE_NONEXISTENT;

    FindClose(fh);
    return WCTYPE_WILDCARD;
}

struct WildcardMatcher {
    HANDLE h;
    char *name;
    char *srcpath;
};

/*
 * Return a pointer to the portion of str that comes after the last
 * slash (or backslash or colon, if `local' is TRUE).
 */
static char *stripslashes(char *str, int local)
{
    char *p;

    if (local) {
        p = strchr(str, ':');
        if (p) str = p+1;
    }

    p = strrchr(str, '/');
    if (p) str = p+1;

    if (local) {
	p = strrchr(str, '\\');
	if (p) str = p+1;
    }

    return str;
}

WildcardMatcher *begin_wildcard_matching(char *name)
{
    HANDLE h;
    WIN32_FIND_DATA fdat;
    WildcardMatcher *ret;
    char *last;

    h = FindFirstFile(name, &fdat);
    if (h == INVALID_HANDLE_VALUE)
	return NULL;

    ret = snew(WildcardMatcher);
    ret->h = h;
    ret->srcpath = dupstr(name);
    last = stripslashes(ret->srcpath, 1);
    *last = '\0';
    if (fdat.cFileName[0] == '.' &&
	(fdat.cFileName[1] == '\0' ||
	 (fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0')))
	ret->name = NULL;
    else
	ret->name = dupcat(ret->srcpath, fdat.cFileName, NULL);

    return ret;
}

char *wildcard_get_filename(WildcardMatcher *dir)
{
    while (!dir->name) {
	WIN32_FIND_DATA fdat;
	int ok = FindNextFile(dir->h, &fdat);

	if (!ok)
	    return NULL;

	if (fdat.cFileName[0] == '.' &&
	    (fdat.cFileName[1] == '\0' ||
	     (fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0')))
	    dir->name = NULL;
	else
	    dir->name = dupcat(dir->srcpath, fdat.cFileName, NULL);
    }

    if (dir->name) {
	char *ret = dir->name;
	dir->name = NULL;
	return ret;
    } else
	return NULL;
}

void finish_wildcard_matching(WildcardMatcher *dir)
{
    FindClose(dir->h);
    if (dir->name)
	sfree(dir->name);
    sfree(dir->srcpath);
    sfree(dir);
}

int vet_filename(char *name)
{
    if (strchr(name, '/') || strchr(name, '\\') || strchr(name, ':'))
	return FALSE;

    if (!name[strspn(name, ".")])      /* entirely composed of dots */
	return FALSE;

    return TRUE;
}

int create_directory(char *name)
{
    return CreateDirectory(name, NULL) != 0;
}

char *dir_file_cat(char *dir, char *file)
{
    return dupcat(dir, "\\", file, NULL);
}

/* ----------------------------------------------------------------------
 * Platform-specific network handling.
 */

/*
 * Be told what socket we're supposed to be using.
 */
static SOCKET sftp_ssh_socket = INVALID_SOCKET;
static HANDLE netevent = NULL;
char *do_select(SOCKET skt, int startup)
{
    int events;
    if (startup)
	sftp_ssh_socket = skt;
    else
	sftp_ssh_socket = INVALID_SOCKET;

    if (p_WSAEventSelect) {
	if (startup) {
	    events = (FD_CONNECT | FD_READ | FD_WRITE |
		      FD_OOB | FD_CLOSE | FD_ACCEPT);
	    netevent = CreateEvent(NULL, FALSE, FALSE, NULL);
	} else {
	    events = 0;
	}
	if (p_WSAEventSelect(skt, netevent, events) == SOCKET_ERROR) {
	    switch (p_WSAGetLastError()) {
	      case WSAENETDOWN:
		return "Network is down";
	      default:
		return "WSAEventSelect(): unknown error";
	    }
	}
    }
    return NULL;
}
extern int select_result(WPARAM, LPARAM);

int do_eventsel_loop(HANDLE other_event)
{
    int n;
    long next, ticks;
    HANDLE handles[2];
    SOCKET *sklist;
    int skcount;
    long now = GETTICKCOUNT();

    if (!netevent) {
	return -1;		       /* doom */
    }

    handles[0] = netevent;
    handles[1] = other_event;

    if (run_timers(now, &next)) {
	ticks = next - GETTICKCOUNT();
	if (ticks < 0) ticks = 0;  /* just in case */
    } else {
	ticks = INFINITE;
    }

    n = MsgWaitForMultipleObjects(other_event ? 2 : 1, handles, FALSE, ticks,
				  QS_POSTMESSAGE);

    if (n == WAIT_OBJECT_0 + 0) {
	WSANETWORKEVENTS things;
	SOCKET socket;
	extern SOCKET first_socket(int *), next_socket(int *);
	extern int select_result(WPARAM, LPARAM);
	int i, socketstate;

	/*
	 * We must not call select_result() for any socket
	 * until we have finished enumerating within the
	 * tree. This is because select_result() may close
	 * the socket and modify the tree.
	 */
	/* Count the active sockets. */
	i = 0;
	for (socket = first_socket(&socketstate);
	     socket != INVALID_SOCKET;
	     socket = next_socket(&socketstate)) i++;

	/* Expand the buffer if necessary. */
	sklist = snewn(i, SOCKET);

	/* Retrieve the sockets into sklist. */
	skcount = 0;
	for (socket = first_socket(&socketstate);
	     socket != INVALID_SOCKET;
	     socket = next_socket(&socketstate)) {
	    sklist[skcount++] = socket;
	}

	/* Now we're done enumerating; go through the list. */
	for (i = 0; i < skcount; i++) {
	    WPARAM wp;
	    socket = sklist[i];
	    wp = (WPARAM) socket;
	    if (!p_WSAEnumNetworkEvents(socket, NULL, &things)) {
		static const struct { int bit, mask; } eventtypes[] = {
		    {FD_CONNECT_BIT, FD_CONNECT},
		    {FD_READ_BIT, FD_READ},
		    {FD_CLOSE_BIT, FD_CLOSE},
		    {FD_OOB_BIT, FD_OOB},
		    {FD_WRITE_BIT, FD_WRITE},
		    {FD_ACCEPT_BIT, FD_ACCEPT},
		};
		int e;

		noise_ultralight(socket);
		noise_ultralight(things.lNetworkEvents);

		for (e = 0; e < lenof(eventtypes); e++)
		    if (things.lNetworkEvents & eventtypes[e].mask) {
			LPARAM lp;
			int err = things.iErrorCode[eventtypes[e].bit];
			lp = WSAMAKESELECTREPLY(eventtypes[e].mask, err);
			select_result(wp, lp);
		    }
	    }
	}

	sfree(sklist);
    }

    if (n == WAIT_TIMEOUT) {
	now = next;
    } else {
	now = GETTICKCOUNT();
    }

    if (other_event && n == WAIT_OBJECT_0 + 1)
	return 1;

    return 0;
}

/*
 * Wait for some network data and process it.
 *
 * We have two variants of this function. One uses select() so that
 * it's compatible with WinSock 1. The other uses WSAEventSelect
 * and MsgWaitForMultipleObjects, so that we can consistently use
 * WSAEventSelect throughout; this enables us to also implement
 * ssh_sftp_get_cmdline() using a parallel mechanism.
 */
int ssh_sftp_loop_iteration(void)
{
    if (sftp_ssh_socket == INVALID_SOCKET)
	return -1;		       /* doom */

    if (p_WSAEventSelect == NULL) {
	fd_set readfds;
	int ret;
	long now = GETTICKCOUNT();

	if (socket_writable(sftp_ssh_socket))
	    select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_WRITE);

	do {
	    long next, ticks;
	    struct timeval tv, *ptv;

	    if (run_timers(now, &next)) {
		ticks = next - GETTICKCOUNT();
		if (ticks <= 0)
		    ticks = 1;	       /* just in case */
		tv.tv_sec = ticks / 1000;
		tv.tv_usec = ticks % 1000 * 1000;
		ptv = &tv;
	    } else {
		ptv = NULL;
	    }

	    FD_ZERO(&readfds);
	    FD_SET(sftp_ssh_socket, &readfds);
	    ret = p_select(1, &readfds, NULL, NULL, ptv);

	    if (ret < 0)
		return -1;		       /* doom */
	    else if (ret == 0)
		now = next;
	    else
		now = GETTICKCOUNT();

	} while (ret == 0);

	select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ);

	return 0;
    } else {
	return do_eventsel_loop(NULL);
    }
}

/*
 * Read a command line from standard input.
 * 
 * In the presence of WinSock 2, we can use WSAEventSelect to
 * mediate between the socket and stdin, meaning we can send
 * keepalives and respond to server events even while waiting at
 * the PSFTP command prompt. Without WS2, we fall back to a simple
 * fgets.
 */
struct command_read_ctx {
    HANDLE event;
    char *line;
};

static DWORD WINAPI command_read_thread(void *param)
{
    struct command_read_ctx *ctx = (struct command_read_ctx *) param;

    ctx->line = fgetline(stdin);

    SetEvent(ctx->event);

    return 0;
}

char *ssh_sftp_get_cmdline(char *prompt, int no_fds_ok)
{
    int ret;
    struct command_read_ctx actx, *ctx = &actx;
    DWORD threadid;

    fputs(prompt, stdout);
    fflush(stdout);

    if ((sftp_ssh_socket == INVALID_SOCKET && no_fds_ok) ||
	p_WSAEventSelect == NULL) {
	return fgetline(stdin);	       /* very simple */
    }

    /*
     * Create a second thread to read from stdin. Process network
     * and timing events until it terminates.
     */
    ctx->event = CreateEvent(NULL, FALSE, FALSE, NULL);
    ctx->line = NULL;

    if (!CreateThread(NULL, 0, command_read_thread,
		      ctx, 0, &threadid)) {
	fprintf(stderr, "Unable to create command input thread\n");
	cleanup_exit(1);
    }

    do {
	ret = do_eventsel_loop(ctx->event);

	/* Error return can only occur if netevent==NULL, and it ain't. */
	assert(ret >= 0);
    } while (ret == 0);

    return ctx->line;
}

/* ----------------------------------------------------------------------
 * Main program. Parse arguments etc.
 */
int main(int argc, char *argv[])
{
    int ret;

    ret = psftp_main(argc, argv);

    return ret;
}
Commit	Line	Data
d6cc41e6	1	/*
799dfcfa	2	* winsftp.c: the Windows-specific parts of PSFTP and PSCP.
d6cc41e6	3	*/
d6cc41e6	4
39934deb	5	#include <assert.h>
39934deb	6
d6cc41e6	7	#include "putty.h"
	8	#include "psftp.h"
	9
799dfcfa	10	/* ----------------------------------------------------------------------
799dfcfa	11	* Interface to GUI driver program.
d6cc41e6	12	*/
799dfcfa	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)
d6cc41e6	62	{
799dfcfa	63	while (!PostMessage(h, message, wParam, 0))
799dfcfa	64	SleepEx(1000, TRUE);
d6cc41e6	65	}
d6cc41e6	66
799dfcfa	67	void gui_send_char(int is_stderr, int c)
d6cc41e6	68	{
799dfcfa	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	}
d6cc41e6	74
799dfcfa	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);
d6cc41e6	96	}
799dfcfa	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;
d6cc41e6	112	}
799dfcfa	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);
d6cc41e6	126	}
d6cc41e6	127
799dfcfa	128	/* ----------------------------------------------------------------------
	129	* File access abstraction.
	130	*/
	131
d6cc41e6	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
799dfcfa	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
8f0ebed4	294	/* Enumerate files in dir `foo'. */
799dfcfa	295	findfile = dupcat(name, "/*", NULL);
	296	h = FindFirstFile(findfile, &fdat);
	297	if (h == INVALID_HANDLE_VALUE)
	298	return NULL;
8c7d710c	299	sfree(findfile);
799dfcfa	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	{
b0e15bb5	309	do {
	310
	311	if (!dir->name) {
	312	WIN32_FIND_DATA fdat;
	313	int ok = FindNextFile(dir->h, &fdat);
	314	if (!ok)
	315	return NULL;
	316	else
	317	dir->name = dupstr(fdat.cFileName);
	318	}
	319
	320	assert(dir->name);
	321	if (dir->name[0] == '.' &&
	322	(dir->name[1] == '\0' \|\|
	323	(dir->name[1] == '.' && dir->name[2] == '\0'))) {
	324	sfree(dir->name);
8c7d710c	325	dir->name = NULL;
b0e15bb5	326	}
	327
	328	} while (!dir->name);
799dfcfa	329
	330	if (dir->name) {
	331	char *ret = dir->name;
	332	dir->name = NULL;
	333	return ret;
	334	} else
	335	return NULL;
	336	}
	337
	338	void close_directory(DirHandle *dir)
	339	{
	340	FindClose(dir->h);
	341	if (dir->name)
	342	sfree(dir->name);
	343	sfree(dir);
	344	}
	345
	346	int test_wildcard(char *name, int cmdline)
	347	{
	348	HANDLE fh;
	349	WIN32_FIND_DATA fdat;
	350
	351	/* First see if the exact name exists. */
	352	if (GetFileAttributes(name) != (DWORD)-1)
	353	return WCTYPE_FILENAME;
	354
	355	/* Otherwise see if a wildcard match finds anything. */
	356	fh = FindFirstFile(name, &fdat);
	357	if (fh == INVALID_HANDLE_VALUE)
	358	return WCTYPE_NONEXISTENT;
	359
	360	FindClose(fh);
	361	return WCTYPE_WILDCARD;
	362	}
	363
	364	struct WildcardMatcher {
	365	HANDLE h;
	366	char *name;
	367	char *srcpath;
	368	};
	369
	370	/*
	371	* Return a pointer to the portion of str that comes after the last
	372	* slash (or backslash or colon, if `local' is TRUE).
	373	*/
	374	static char stripslashes(char str, int local)
	375	{
	376	char *p;
	377
	378	if (local) {
	379	p = strchr(str, ':');
	380	if (p) str = p+1;
	381	}
	382
	383	p = strrchr(str, '/');
	384	if (p) str = p+1;
	385
	386	if (local) {
	387	p = strrchr(str, '\\');
	388	if (p) str = p+1;
	389	}
	390
	391	return str;
	392	}
393
394	WildcardMatcher begin_wildcard_matching(char name)
395	{
396	HANDLE h;
397	WIN32_FIND_DATA fdat;
398	WildcardMatcher *ret;
399	char *last;
400
401	h = FindFirstFile(name, &fdat);
402	if (h == INVALID_HANDLE_VALUE)
403	return NULL;
404
405	ret = snew(WildcardMatcher);
406	ret->h = h;
407	ret->srcpath = dupstr(name);
408	last = stripslashes(ret->srcpath, 1);
409	*last = '\0';
410	if (fdat.cFileName[0] == '.' &&
411	(fdat.cFileName[1] == '\0' \|\|
412	(fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0')))
413	ret->name = NULL;
414	else
415	ret->name = dupcat(ret->srcpath, fdat.cFileName, NULL);
416
417	return ret;
418	}
419
420	char wildcard_get_filename(WildcardMatcher dir)
421	{
422	while (!dir->name) {
423	WIN32_FIND_DATA fdat;
424	int ok = FindNextFile(dir->h, &fdat);
425
426	if (!ok)
427	return NULL;
428
429	if (fdat.cFileName[0] == '.' &&
430	(fdat.cFileName[1] == '\0' \|\|
431	(fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0')))
432	dir->name = NULL;
433	else
434	dir->name = dupcat(dir->srcpath, fdat.cFileName, NULL);
435	}
436
437	if (dir->name) {
438	char *ret = dir->name;
439	dir->name = NULL;
440	return ret;
441	} else
442	return NULL;
443	}
444
445	void finish_wildcard_matching(WildcardMatcher *dir)
446	{
447	FindClose(dir->h);
448	if (dir->name)
449	sfree(dir->name);
450	sfree(dir->srcpath);
451	sfree(dir);
452	}
453
e9d14678	454	int vet_filename(char *name)
	455	{
	456	if (strchr(name, '/') \|\| strchr(name, '\\') \|\| strchr(name, ':'))
	457	return FALSE;
	458
	459	if (!name[strspn(name, ".")]) /* entirely composed of dots */
	460	return FALSE;
	461
	462	return TRUE;
	463	}
	464
799dfcfa	465	int create_directory(char *name)
	466	{
	467	return CreateDirectory(name, NULL) != 0;
	468	}
	469
8c7d710c	470	char dir_file_cat(char dir, char *file)
	471	{
	472	return dupcat(dir, "\\", file, NULL);
	473	}
	474
799dfcfa	475	/* ----------------------------------------------------------------------
	476	* Platform-specific network handling.
	477	*/
	478
	479	/*
	480	* Be told what socket we're supposed to be using.
	481	*/
65857773	482	static SOCKET sftp_ssh_socket = INVALID_SOCKET;
39934deb	483	static HANDLE netevent = NULL;
799dfcfa	484	char *do_select(SOCKET skt, int startup)
799dfcfa	485	{
39934deb	486	int events;
799dfcfa	487	if (startup)
	488	sftp_ssh_socket = skt;
	489	else
	490	sftp_ssh_socket = INVALID_SOCKET;
39934deb	491
	492	if (p_WSAEventSelect) {
	493	if (startup) {
	494	events = (FD_CONNECT \| FD_READ \| FD_WRITE \|
	495	FD_OOB \| FD_CLOSE \| FD_ACCEPT);
	496	netevent = CreateEvent(NULL, FALSE, FALSE, NULL);
	497	} else {
	498	events = 0;
	499	}
	500	if (p_WSAEventSelect(skt, netevent, events) == SOCKET_ERROR) {
	501	switch (p_WSAGetLastError()) {
	502	case WSAENETDOWN:
	503	return "Network is down";
	504	default:
	505	return "WSAEventSelect(): unknown error";
	506	}
	507	}
	508	}
799dfcfa	509	return NULL;
	510	}
	511	extern int select_result(WPARAM, LPARAM);
	512
39934deb	513	int do_eventsel_loop(HANDLE other_event)
	514	{
	515	int n;
	516	long next, ticks;
	517	HANDLE handles[2];
	518	SOCKET *sklist;
	519	int skcount;
	520	long now = GETTICKCOUNT();
	521
	522	if (!netevent) {
	523	return -1; /* doom */
	524	}
	525
	526	handles[0] = netevent;
	527	handles[1] = other_event;
	528
	529	if (run_timers(now, &next)) {
	530	ticks = next - GETTICKCOUNT();
	531	if (ticks < 0) ticks = 0; /* just in case */
	532	} else {
	533	ticks = INFINITE;
	534	}
	535
	536	n = MsgWaitForMultipleObjects(other_event ? 2 : 1, handles, FALSE, ticks,
	537	QS_POSTMESSAGE);
	538
	539	if (n == WAIT_OBJECT_0 + 0) {
	540	WSANETWORKEVENTS things;
	541	SOCKET socket;
	542	extern SOCKET first_socket(int ), next_socket(int );
	543	extern int select_result(WPARAM, LPARAM);
	544	int i, socketstate;
	545
	546	/*
	547	* We must not call select_result() for any socket
	548	* until we have finished enumerating within the
	549	* tree. This is because select_result() may close
	550	* the socket and modify the tree.
	551	*/
	552	/* Count the active sockets. */
	553	i = 0;
	554	for (socket = first_socket(&socketstate);
	555	socket != INVALID_SOCKET;
	556	socket = next_socket(&socketstate)) i++;
	557
	558	/* Expand the buffer if necessary. */
	559	sklist = snewn(i, SOCKET);
	560
	561	/* Retrieve the sockets into sklist. */
	562	skcount = 0;
	563	for (socket = first_socket(&socketstate);
	564	socket != INVALID_SOCKET;
	565	socket = next_socket(&socketstate)) {
	566	sklist[skcount++] = socket;
	567	}
	568
	569	/* Now we're done enumerating; go through the list. */
	570	for (i = 0; i < skcount; i++) {
	571	WPARAM wp;
	572	socket = sklist[i];
	573	wp = (WPARAM) socket;
	574	if (!p_WSAEnumNetworkEvents(socket, NULL, &things)) {
	575	static const struct { int bit, mask; } eventtypes[] = {
	576	{FD_CONNECT_BIT, FD_CONNECT},
577	{FD_READ_BIT, FD_READ},
578	{FD_CLOSE_BIT, FD_CLOSE},
579	{FD_OOB_BIT, FD_OOB},
580	{FD_WRITE_BIT, FD_WRITE},
581	{FD_ACCEPT_BIT, FD_ACCEPT},
582	};
583	int e;
584
585	noise_ultralight(socket);
586	noise_ultralight(things.lNetworkEvents);
587
588	for (e = 0; e < lenof(eventtypes); e++)
589	if (things.lNetworkEvents & eventtypes[e].mask) {
590	LPARAM lp;
591	int err = things.iErrorCode[eventtypes[e].bit];
592	lp = WSAMAKESELECTREPLY(eventtypes[e].mask, err);
593	select_result(wp, lp);
594	}
595	}
596	}
597
598	sfree(sklist);
599	}
600
601	if (n == WAIT_TIMEOUT) {
602	now = next;
603	} else {
604	now = GETTICKCOUNT();
605	}
606
607	if (other_event && n == WAIT_OBJECT_0 + 1)
608	return 1;
609
610	return 0;
611	}
612
799dfcfa	613	/*
d6cc41e6	614	* Wait for some network data and process it.
39934deb	615	*
	616	* We have two variants of this function. One uses select() so that
	617	* it's compatible with WinSock 1. The other uses WSAEventSelect
	618	* and MsgWaitForMultipleObjects, so that we can consistently use
	619	* WSAEventSelect throughout; this enables us to also implement
	620	* ssh_sftp_get_cmdline() using a parallel mechanism.
d6cc41e6	621	*/
	622	int ssh_sftp_loop_iteration(void)
	623	{
d6cc41e6	624	if (sftp_ssh_socket == INVALID_SOCKET)
	625	return -1; /* doom */
	626
39934deb	627	if (p_WSAEventSelect == NULL) {
	628	fd_set readfds;
	629	int ret;
	630	long now = GETTICKCOUNT();
	631
	632	if (socket_writable(sftp_ssh_socket))
	633	select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_WRITE);
	634
	635	do {
	636	long next, ticks;
	637	struct timeval tv, *ptv;
	638
	639	if (run_timers(now, &next)) {
	640	ticks = next - GETTICKCOUNT();
	641	if (ticks <= 0)
	642	ticks = 1; /* just in case */
	643	tv.tv_sec = ticks / 1000;
	644	tv.tv_usec = ticks % 1000 * 1000;
	645	ptv = &tv;
	646	} else {
	647	ptv = NULL;
	648	}
	649
	650	FD_ZERO(&readfds);
	651	FD_SET(sftp_ssh_socket, &readfds);
	652	ret = p_select(1, &readfds, NULL, NULL, ptv);
	653
	654	if (ret < 0)
	655	return -1; /* doom */
	656	else if (ret == 0)
	657	now = next;
	658	else
	659	now = GETTICKCOUNT();
	660
	661	} while (ret == 0);
	662
	663	select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ);
	664
	665	return 0;
	666	} else {
	667	return do_eventsel_loop(NULL);
	668	}
	669	}
	670
	671	/*
	672	* Read a command line from standard input.
	673	*
	674	* In the presence of WinSock 2, we can use WSAEventSelect to
	675	* mediate between the socket and stdin, meaning we can send
	676	* keepalives and respond to server events even while waiting at
	677	* the PSFTP command prompt. Without WS2, we fall back to a simple
	678	* fgets.
	679	*/
	680	struct command_read_ctx {
	681	HANDLE event;
	682	char *line;
	683	};
	684
	685	static DWORD WINAPI command_read_thread(void *param)
	686	{
	687	struct command_read_ctx ctx = (struct command_read_ctx ) param;
	688
	689	ctx->line = fgetline(stdin);
	690
691	SetEvent(ctx->event);
d6cc41e6	692
d6cc41e6	693	return 0;
	694	}
	695
65857773	696	char ssh_sftp_get_cmdline(char prompt, int no_fds_ok)
39934deb	697	{
	698	int ret;
	699	struct command_read_ctx actx, *ctx = &actx;
	700	DWORD threadid;
	701
	702	fputs(prompt, stdout);
	703	fflush(stdout);
	704
65857773	705	if ((sftp_ssh_socket == INVALID_SOCKET && no_fds_ok) \|\|
65857773	706	p_WSAEventSelect == NULL) {
39934deb	707	return fgetline(stdin); /* very simple */
	708	}
	709
	710	/*
	711	* Create a second thread to read from stdin. Process network
	712	* and timing events until it terminates.
	713	*/
	714	ctx->event = CreateEvent(NULL, FALSE, FALSE, NULL);
	715	ctx->line = NULL;
	716
	717	if (!CreateThread(NULL, 0, command_read_thread,
	718	ctx, 0, &threadid)) {
	719	fprintf(stderr, "Unable to create command input thread\n");
	720	cleanup_exit(1);
	721	}
	722
	723	do {
	724	ret = do_eventsel_loop(ctx->event);
	725
	726	/* Error return can only occur if netevent==NULL, and it ain't. */
	727	assert(ret >= 0);
	728	} while (ret == 0);
	729
	730	return ctx->line;
	731	}
	732
799dfcfa	733	/* ----------------------------------------------------------------------
d6cc41e6	734	* Main program. Parse arguments etc.
	735	*/
	736	int main(int argc, char *argv[])
	737	{
	738	int ret;
	739
d6cc41e6	740	ret = psftp_main(argc, argv);
d6cc41e6	741
	742	return ret;
	743	}