[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"
#include "int64.h"

char *get_ttymode(void *frontend, const char *mode) { return NULL; }

int get_userpass_input(prompts_t *p, unsigned char *in, int inlen)
{
    int ret;
    ret = cmdline_get_passwd_input(p, in, inlen);
    if (ret == -1)
	ret = console_get_userpass_input(p, in, inlen);
    return ret;
}

void platform_get_x11_auth(struct X11Display *display, const Config *cfg)
{
    /* Do nothing, therefore no auth. */
}
const int platform_uses_x11_unix_by_default = TRUE;

/* ----------------------------------------------------------------------
 * 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, uint64 *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->lo=GetFileSize(h, &(size->hi));

    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;
}

WFile *open_existing_wfile(char *name, uint64 *size)
{
    HANDLE h;
    WFile *ret;

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

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

    if (size)
	size->lo=GetFileSize(h, &(size->hi));

    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);
}

/* Seek offset bytes through file, from whence, where whence is
   FROM_START, FROM_CURRENT, or FROM_END */
int seek_file(WFile *f, uint64 offset, int whence)
{
    DWORD movemethod;

    switch (whence) {
    case FROM_START:
	movemethod = FILE_BEGIN;
	break;
    case FROM_CURRENT:
	movemethod = FILE_CURRENT;
	break;
    case FROM_END:
	movemethod = FILE_END;
	break;
    default:
	return -1;
    }

    SetFilePointer(f->h, offset.lo, &(offset.hi), movemethod);
    
    if (GetLastError() != NO_ERROR)
	return -1;
    else 
	return 0;
}

uint64 get_file_posn(WFile *f)
{
    uint64 ret;

    ret.hi = 0L;
    ret.lo = SetFilePointer(f->h, 0L, &(ret.hi), FILE_CURRENT);

    return ret;
}

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 = INVALID_HANDLE_VALUE;
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, nhandles, nallhandles, netindex, otherindex;
    long next, ticks;
    HANDLE *handles;
    SOCKET *sklist;
    int skcount;
    long now = GETTICKCOUNT();

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

    handles = handle_get_events(&nhandles);
    handles = sresize(handles, nhandles+2, HANDLE);
    nallhandles = nhandles;

    if (netevent != INVALID_HANDLE_VALUE)
	handles[netindex = nallhandles++] = netevent;
    else
	netindex = -1;
    if (other_event != INVALID_HANDLE_VALUE)
	handles[otherindex = nallhandles++] = other_event;
    else
	otherindex = -1;

    n = WaitForMultipleObjects(nallhandles, handles, FALSE, ticks);

    if ((unsigned)(n - WAIT_OBJECT_0) < (unsigned)nhandles) {
	handle_got_event(handles[n - WAIT_OBJECT_0]);
    } else if (netindex >= 0 && n == WAIT_OBJECT_0 + netindex) {
	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);
    }

    sfree(handles);

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

    if (otherindex >= 0 && n == WAIT_OBJECT_0 + otherindex)
	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 (p_WSAEventSelect == NULL) {
	fd_set readfds;
	int ret;
	long now = GETTICKCOUNT();

	if (sftp_ssh_socket == INVALID_SOCKET)
	    return -1;		       /* doom */

	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(INVALID_HANDLE_VALUE);
    }
}

/*
 * 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"
d6cc41e6	8	#include "psftp.h"
0ac1920c	9	#include "int64.h"
c6ccd5c2	10
c6ccd5c2	11	char get_ttymode(void frontend, const char *mode) { return NULL; }
edd0cb8a	12
	13	int get_userpass_input(prompts_t p, unsigned char in, int inlen)
	14	{
	15	int ret;
	16	ret = cmdline_get_passwd_input(p, in, inlen);
	17	if (ret == -1)
	18	ret = console_get_userpass_input(p, in, inlen);
	19	return ret;
	20	}
d6cc41e6	21
8def70c3	22	void platform_get_x11_auth(struct X11Display display, const Config cfg)
	23	{
	24	/* Do nothing, therefore no auth. */
	25	}
	26	const int platform_uses_x11_unix_by_default = TRUE;
	27
799dfcfa	28	/* ----------------------------------------------------------------------
	29	* File access abstraction.
	30	*/
	31
d6cc41e6	32	/*
	33	* Set local current directory. Returns NULL on success, or else an
	34	* error message which must be freed after printing.
	35	*/
	36	char psftp_lcd(char dir)
	37	{
	38	char *ret = NULL;
	39
	40	if (!SetCurrentDirectory(dir)) {
	41	LPVOID message;
	42	int i;
	43	FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER \|
	44	FORMAT_MESSAGE_FROM_SYSTEM \|
	45	FORMAT_MESSAGE_IGNORE_INSERTS,
	46	NULL, GetLastError(),
	47	MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
	48	(LPTSTR)&message, 0, NULL);
	49	i = strcspn((char *)message, "\n");
	50	ret = dupprintf("%.*s", i, (LPCTSTR)message);
	51	LocalFree(message);
	52	}
	53
	54	return ret;
	55	}
	56
	57	/*
	58	* Get local current directory. Returns a string which must be
	59	* freed.
	60	*/
	61	char *psftp_getcwd(void)
	62	{
	63	char *ret = snewn(256, char);
	64	int len = GetCurrentDirectory(256, ret);
	65	if (len > 256)
	66	ret = sresize(ret, len, char);
	67	GetCurrentDirectory(len, ret);
	68	return ret;
	69	}
	70
799dfcfa	71	#define TIME_POSIX_TO_WIN(t, ft) ((LONGLONG)&(ft) = \
	72	((LONGLONG) (t) + (LONGLONG) 11644473600) * (LONGLONG) 10000000)
	73	#define TIME_WIN_TO_POSIX(ft, t) ((t) = (unsigned long) \
	74	(((LONGLONG)&(ft)) / (LONGLONG) 10000000 - (LONGLONG) 11644473600))
	75
	76	struct RFile {
	77	HANDLE h;
	78	};
	79
0ac1920c	80	RFile open_existing_file(char name, uint64 *size,
799dfcfa	81	unsigned long mtime, unsigned long atime)
	82	{
	83	HANDLE h;
	84	RFile *ret;
	85
	86	h = CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL,
	87	OPEN_EXISTING, 0, 0);
	88	if (h == INVALID_HANDLE_VALUE)
	89	return NULL;
	90
	91	ret = snew(RFile);
	92	ret->h = h;
	93
	94	if (size)
0ac1920c	95	size->lo=GetFileSize(h, &(size->hi));
799dfcfa	96
	97	if (mtime \|\| atime) {
	98	FILETIME actime, wrtime;
	99	GetFileTime(h, NULL, &actime, &wrtime);
	100	if (atime)
	101	TIME_WIN_TO_POSIX(actime, *atime);
	102	if (mtime)
	103	TIME_WIN_TO_POSIX(wrtime, *mtime);
	104	}
	105
	106	return ret;
	107	}
	108
	109	int read_from_file(RFile f, void buffer, int length)
	110	{
	111	int ret, read;
	112	ret = ReadFile(f->h, buffer, length, &read, NULL);
	113	if (!ret)
	114	return -1; /* error */
	115	else
	116	return read;
	117	}
	118
	119	void close_rfile(RFile *f)
	120	{
	121	CloseHandle(f->h);
	122	sfree(f);
	123	}
	124
	125	struct WFile {
	126	HANDLE h;
	127	};
	128
	129	WFile open_new_file(char name)
	130	{
	131	HANDLE h;
	132	WFile *ret;
	133
	134	h = CreateFile(name, GENERIC_WRITE, 0, NULL,
	135	CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
	136	if (h == INVALID_HANDLE_VALUE)
	137	return NULL;
	138
	139	ret = snew(WFile);
	140	ret->h = h;
	141
	142	return ret;
	143	}
	144
0ac1920c	145	WFile open_existing_wfile(char name, uint64 *size)
	146	{
	147	HANDLE h;
	148	WFile *ret;
	149
	150	h = CreateFile(name, GENERIC_WRITE, FILE_SHARE_READ, NULL,
	151	OPEN_EXISTING, 0, 0);
	152	if (h == INVALID_HANDLE_VALUE)
	153	return NULL;
	154
	155	ret = snew(WFile);
	156	ret->h = h;
	157
	158	if (size)
	159	size->lo=GetFileSize(h, &(size->hi));
	160
	161	return ret;
	162	}
	163
799dfcfa	164	int write_to_file(WFile f, void buffer, int length)
	165	{
	166	int ret, written;
	167	ret = WriteFile(f->h, buffer, length, &written, NULL);
	168	if (!ret)
	169	return -1; /* error */
	170	else
	171	return written;
	172	}
	173
	174	void set_file_times(WFile *f, unsigned long mtime, unsigned long atime)
	175	{
	176	FILETIME actime, wrtime;
	177	TIME_POSIX_TO_WIN(atime, actime);
	178	TIME_POSIX_TO_WIN(mtime, wrtime);
	179	SetFileTime(f->h, NULL, &actime, &wrtime);
	180	}
	181
	182	void close_wfile(WFile *f)
	183	{
	184	CloseHandle(f->h);
	185	sfree(f);
	186	}
	187
0ac1920c	188	/* Seek offset bytes through file, from whence, where whence is
	189	FROM_START, FROM_CURRENT, or FROM_END */
	190	int seek_file(WFile *f, uint64 offset, int whence)
	191	{
	192	DWORD movemethod;
	193
	194	switch (whence) {
	195	case FROM_START:
	196	movemethod = FILE_BEGIN;
	197	break;
	198	case FROM_CURRENT:
	199	movemethod = FILE_CURRENT;
	200	break;
	201	case FROM_END:
	202	movemethod = FILE_END;
	203	break;
	204	default:
	205	return -1;
	206	}
	207
	208	SetFilePointer(f->h, offset.lo, &(offset.hi), movemethod);
	209
	210	if (GetLastError() != NO_ERROR)
	211	return -1;
	212	else
	213	return 0;
	214	}
	215
	216	uint64 get_file_posn(WFile *f)
	217	{
	218	uint64 ret;
	219
	220	ret.hi = 0L;
	221	ret.lo = SetFilePointer(f->h, 0L, &(ret.hi), FILE_CURRENT);
	222
	223	return ret;
	224	}
	225
799dfcfa	226	int file_type(char *name)
	227	{
	228	DWORD attr;
	229	attr = GetFileAttributes(name);
	230	/* We know of no `weird' files under Windows. */
	231	if (attr == (DWORD)-1)
	232	return FILE_TYPE_NONEXISTENT;
	233	else if (attr & FILE_ATTRIBUTE_DIRECTORY)
	234	return FILE_TYPE_DIRECTORY;
	235	else
	236	return FILE_TYPE_FILE;
	237	}
	238
	239	struct DirHandle {
	240	HANDLE h;
	241	char *name;
	242	};
	243
	244	DirHandle open_directory(char name)
	245	{
	246	HANDLE h;
	247	WIN32_FIND_DATA fdat;
	248	char *findfile;
	249	DirHandle *ret;
	250
8f0ebed4	251	/* Enumerate files in dir `foo'. */
799dfcfa	252	findfile = dupcat(name, "/*", NULL);
	253	h = FindFirstFile(findfile, &fdat);
	254	if (h == INVALID_HANDLE_VALUE)
	255	return NULL;
8c7d710c	256	sfree(findfile);
799dfcfa	257
	258	ret = snew(DirHandle);
	259	ret->h = h;
	260	ret->name = dupstr(fdat.cFileName);
	261	return ret;
	262	}
	263
	264	char read_filename(DirHandle dir)
	265	{
b0e15bb5	266	do {
	267
	268	if (!dir->name) {
	269	WIN32_FIND_DATA fdat;
	270	int ok = FindNextFile(dir->h, &fdat);
	271	if (!ok)
	272	return NULL;
	273	else
	274	dir->name = dupstr(fdat.cFileName);
	275	}
	276
	277	assert(dir->name);
	278	if (dir->name[0] == '.' &&
	279	(dir->name[1] == '\0' \|\|
	280	(dir->name[1] == '.' && dir->name[2] == '\0'))) {
	281	sfree(dir->name);
8c7d710c	282	dir->name = NULL;
b0e15bb5	283	}
	284
	285	} while (!dir->name);
799dfcfa	286
	287	if (dir->name) {
	288	char *ret = dir->name;
	289	dir->name = NULL;
	290	return ret;
	291	} else
	292	return NULL;
	293	}
	294
	295	void close_directory(DirHandle *dir)
	296	{
	297	FindClose(dir->h);
	298	if (dir->name)
	299	sfree(dir->name);
	300	sfree(dir);
	301	}
	302
	303	int test_wildcard(char *name, int cmdline)
	304	{
	305	HANDLE fh;
	306	WIN32_FIND_DATA fdat;
	307
	308	/* First see if the exact name exists. */
	309	if (GetFileAttributes(name) != (DWORD)-1)
	310	return WCTYPE_FILENAME;
	311
	312	/* Otherwise see if a wildcard match finds anything. */
	313	fh = FindFirstFile(name, &fdat);
	314	if (fh == INVALID_HANDLE_VALUE)
	315	return WCTYPE_NONEXISTENT;
	316
	317	FindClose(fh);
	318	return WCTYPE_WILDCARD;
	319	}
	320
	321	struct WildcardMatcher {
	322	HANDLE h;
	323	char *name;
	324	char *srcpath;
	325	};
	326
	327	/*
	328	* Return a pointer to the portion of str that comes after the last
	329	* slash (or backslash or colon, if `local' is TRUE).
	330	*/
	331	static char stripslashes(char str, int local)
	332	{
	333	char *p;
	334
	335	if (local) {
	336	p = strchr(str, ':');
	337	if (p) str = p+1;
	338	}
	339
	340	p = strrchr(str, '/');
	341	if (p) str = p+1;
	342
	343	if (local) {
	344	p = strrchr(str, '\\');
	345	if (p) str = p+1;
	346	}
	347
	348	return str;
	349	}
350
351	WildcardMatcher begin_wildcard_matching(char name)
352	{
353	HANDLE h;
354	WIN32_FIND_DATA fdat;
355	WildcardMatcher *ret;
356	char *last;
357
358	h = FindFirstFile(name, &fdat);
359	if (h == INVALID_HANDLE_VALUE)
360	return NULL;
361
362	ret = snew(WildcardMatcher);
363	ret->h = h;
364	ret->srcpath = dupstr(name);
365	last = stripslashes(ret->srcpath, 1);
366	*last = '\0';
367	if (fdat.cFileName[0] == '.' &&
368	(fdat.cFileName[1] == '\0' \|\|
369	(fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0')))
370	ret->name = NULL;
371	else
372	ret->name = dupcat(ret->srcpath, fdat.cFileName, NULL);
373
374	return ret;
375	}
376
377	char wildcard_get_filename(WildcardMatcher dir)
378	{
379	while (!dir->name) {
380	WIN32_FIND_DATA fdat;
381	int ok = FindNextFile(dir->h, &fdat);
382
383	if (!ok)
384	return NULL;
385
386	if (fdat.cFileName[0] == '.' &&
387	(fdat.cFileName[1] == '\0' \|\|
388	(fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0')))
389	dir->name = NULL;
390	else
391	dir->name = dupcat(dir->srcpath, fdat.cFileName, NULL);
392	}
393
394	if (dir->name) {
395	char *ret = dir->name;
396	dir->name = NULL;
397	return ret;
398	} else
399	return NULL;
400	}
401
402	void finish_wildcard_matching(WildcardMatcher *dir)
403	{
404	FindClose(dir->h);
405	if (dir->name)
406	sfree(dir->name);
407	sfree(dir->srcpath);
408	sfree(dir);
409	}
410
e9d14678	411	int vet_filename(char *name)
	412	{
	413	if (strchr(name, '/') \|\| strchr(name, '\\') \|\| strchr(name, ':'))
	414	return FALSE;
	415
	416	if (!name[strspn(name, ".")]) /* entirely composed of dots */
	417	return FALSE;
	418
	419	return TRUE;
	420	}
	421
799dfcfa	422	int create_directory(char *name)
	423	{
	424	return CreateDirectory(name, NULL) != 0;
	425	}
	426
8c7d710c	427	char dir_file_cat(char dir, char *file)
	428	{
	429	return dupcat(dir, "\\", file, NULL);
	430	}
	431
799dfcfa	432	/* ----------------------------------------------------------------------
	433	* Platform-specific network handling.
	434	*/
	435
	436	/*
	437	* Be told what socket we're supposed to be using.
	438	*/
65857773	439	static SOCKET sftp_ssh_socket = INVALID_SOCKET;
4a0b6d61	440	static HANDLE netevent = INVALID_HANDLE_VALUE;
799dfcfa	441	char *do_select(SOCKET skt, int startup)
799dfcfa	442	{
39934deb	443	int events;
799dfcfa	444	if (startup)
	445	sftp_ssh_socket = skt;
	446	else
	447	sftp_ssh_socket = INVALID_SOCKET;
39934deb	448
	449	if (p_WSAEventSelect) {
	450	if (startup) {
	451	events = (FD_CONNECT \| FD_READ \| FD_WRITE \|
	452	FD_OOB \| FD_CLOSE \| FD_ACCEPT);
	453	netevent = CreateEvent(NULL, FALSE, FALSE, NULL);
	454	} else {
	455	events = 0;
	456	}
	457	if (p_WSAEventSelect(skt, netevent, events) == SOCKET_ERROR) {
	458	switch (p_WSAGetLastError()) {
	459	case WSAENETDOWN:
	460	return "Network is down";
	461	default:
	462	return "WSAEventSelect(): unknown error";
	463	}
	464	}
	465	}
799dfcfa	466	return NULL;
	467	}
	468	extern int select_result(WPARAM, LPARAM);
	469
39934deb	470	int do_eventsel_loop(HANDLE other_event)
39934deb	471	{
fbe6468e	472	int n, nhandles, nallhandles, netindex, otherindex;
39934deb	473	long next, ticks;
34292b1d	474	HANDLE *handles;
39934deb	475	SOCKET *sklist;
	476	int skcount;
	477	long now = GETTICKCOUNT();
	478
fbe6468e	479	if (run_timers(now, &next)) {
	480	ticks = next - GETTICKCOUNT();
	481	if (ticks < 0) ticks = 0; /* just in case */
	482	} else {
	483	ticks = INFINITE;
39934deb	484	}
39934deb	485
34292b1d	486	handles = handle_get_events(&nhandles);
	487	handles = sresize(handles, nhandles+2, HANDLE);
	488	nallhandles = nhandles;
	489
4a0b6d61	490	if (netevent != INVALID_HANDLE_VALUE)
fbe6468e	491	handles[netindex = nallhandles++] = netevent;
	492	else
	493	netindex = -1;
4a0b6d61	494	if (other_event != INVALID_HANDLE_VALUE)
fbe6468e	495	handles[otherindex = nallhandles++] = other_event;
	496	else
	497	otherindex = -1;
39934deb	498
4d6848ce	499	n = WaitForMultipleObjects(nallhandles, handles, FALSE, ticks);
39934deb	500
34292b1d	501	if ((unsigned)(n - WAIT_OBJECT_0) < (unsigned)nhandles) {
34292b1d	502	handle_got_event(handles[n - WAIT_OBJECT_0]);
fbe6468e	503	} else if (netindex >= 0 && n == WAIT_OBJECT_0 + netindex) {
39934deb	504	WSANETWORKEVENTS things;
	505	SOCKET socket;
	506	extern SOCKET first_socket(int ), next_socket(int );
	507	extern int select_result(WPARAM, LPARAM);
	508	int i, socketstate;
	509
	510	/*
	511	* We must not call select_result() for any socket
	512	* until we have finished enumerating within the
	513	* tree. This is because select_result() may close
	514	* the socket and modify the tree.
	515	*/
	516	/* Count the active sockets. */
	517	i = 0;
	518	for (socket = first_socket(&socketstate);
	519	socket != INVALID_SOCKET;
	520	socket = next_socket(&socketstate)) i++;
	521
	522	/* Expand the buffer if necessary. */
	523	sklist = snewn(i, SOCKET);
	524
	525	/* Retrieve the sockets into sklist. */
	526	skcount = 0;
	527	for (socket = first_socket(&socketstate);
	528	socket != INVALID_SOCKET;
	529	socket = next_socket(&socketstate)) {
	530	sklist[skcount++] = socket;
	531	}
	532
	533	/* Now we're done enumerating; go through the list. */
	534	for (i = 0; i < skcount; i++) {
	535	WPARAM wp;
	536	socket = sklist[i];
	537	wp = (WPARAM) socket;
	538	if (!p_WSAEnumNetworkEvents(socket, NULL, &things)) {
	539	static const struct { int bit, mask; } eventtypes[] = {
	540	{FD_CONNECT_BIT, FD_CONNECT},
	541	{FD_READ_BIT, FD_READ},
	542	{FD_CLOSE_BIT, FD_CLOSE},
	543	{FD_OOB_BIT, FD_OOB},
	544	{FD_WRITE_BIT, FD_WRITE},
	545	{FD_ACCEPT_BIT, FD_ACCEPT},
	546	};
	547	int e;
	548
	549	noise_ultralight(socket);
	550	noise_ultralight(things.lNetworkEvents);
	551
	552	for (e = 0; e < lenof(eventtypes); e++)
	553	if (things.lNetworkEvents & eventtypes[e].mask) {
	554	LPARAM lp;
	555	int err = things.iErrorCode[eventtypes[e].bit];
	556	lp = WSAMAKESELECTREPLY(eventtypes[e].mask, err);
	557	select_result(wp, lp);
	558	}
	559	}
	560	}
	561
	562	sfree(sklist);
	563	}
	564
34292b1d	565	sfree(handles);
34292b1d	566
39934deb	567	if (n == WAIT_TIMEOUT) {
	568	now = next;
	569	} else {
	570	now = GETTICKCOUNT();
	571	}
	572
fbe6468e	573	if (otherindex >= 0 && n == WAIT_OBJECT_0 + otherindex)
39934deb	574	return 1;
	575
	576	return 0;
	577	}
	578
799dfcfa	579	/*
d6cc41e6	580	* Wait for some network data and process it.
39934deb	581	*
	582	* We have two variants of this function. One uses select() so that
	583	* it's compatible with WinSock 1. The other uses WSAEventSelect
	584	* and MsgWaitForMultipleObjects, so that we can consistently use
	585	* WSAEventSelect throughout; this enables us to also implement
	586	* ssh_sftp_get_cmdline() using a parallel mechanism.
d6cc41e6	587	*/
	588	int ssh_sftp_loop_iteration(void)
	589	{
39934deb	590	if (p_WSAEventSelect == NULL) {
	591	fd_set readfds;
	592	int ret;
	593	long now = GETTICKCOUNT();
	594
fbe6468e	595	if (sftp_ssh_socket == INVALID_SOCKET)
	596	return -1; /* doom */
	597
39934deb	598	if (socket_writable(sftp_ssh_socket))
	599	select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_WRITE);
	600
	601	do {
	602	long next, ticks;
	603	struct timeval tv, *ptv;
	604
	605	if (run_timers(now, &next)) {
	606	ticks = next - GETTICKCOUNT();
	607	if (ticks <= 0)
	608	ticks = 1; /* just in case */
	609	tv.tv_sec = ticks / 1000;
	610	tv.tv_usec = ticks % 1000 * 1000;
	611	ptv = &tv;
	612	} else {
	613	ptv = NULL;
	614	}
	615
	616	FD_ZERO(&readfds);
	617	FD_SET(sftp_ssh_socket, &readfds);
	618	ret = p_select(1, &readfds, NULL, NULL, ptv);
	619
	620	if (ret < 0)
	621	return -1; /* doom */
	622	else if (ret == 0)
	623	now = next;
	624	else
	625	now = GETTICKCOUNT();
	626
	627	} while (ret == 0);
	628
	629	select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ);
	630
	631	return 0;
	632	} else {
4a0b6d61	633	return do_eventsel_loop(INVALID_HANDLE_VALUE);
39934deb	634	}
	635	}
	636
	637	/*
	638	* Read a command line from standard input.
	639	*
	640	* In the presence of WinSock 2, we can use WSAEventSelect to
	641	* mediate between the socket and stdin, meaning we can send
	642	* keepalives and respond to server events even while waiting at
	643	* the PSFTP command prompt. Without WS2, we fall back to a simple
	644	* fgets.
	645	*/
	646	struct command_read_ctx {
	647	HANDLE event;
	648	char *line;
	649	};
	650
	651	static DWORD WINAPI command_read_thread(void *param)
	652	{
	653	struct command_read_ctx ctx = (struct command_read_ctx ) param;
	654
	655	ctx->line = fgetline(stdin);
	656
	657	SetEvent(ctx->event);
d6cc41e6	658
d6cc41e6	659	return 0;
	660	}
	661
65857773	662	char ssh_sftp_get_cmdline(char prompt, int no_fds_ok)
39934deb	663	{
	664	int ret;
	665	struct command_read_ctx actx, *ctx = &actx;
	666	DWORD threadid;
	667
	668	fputs(prompt, stdout);
	669	fflush(stdout);
	670
65857773	671	if ((sftp_ssh_socket == INVALID_SOCKET && no_fds_ok) \|\|
65857773	672	p_WSAEventSelect == NULL) {
39934deb	673	return fgetline(stdin); /* very simple */
	674	}
	675
	676	/*
	677	* Create a second thread to read from stdin. Process network
	678	* and timing events until it terminates.
	679	*/
	680	ctx->event = CreateEvent(NULL, FALSE, FALSE, NULL);
	681	ctx->line = NULL;
	682
	683	if (!CreateThread(NULL, 0, command_read_thread,
	684	ctx, 0, &threadid)) {
	685	fprintf(stderr, "Unable to create command input thread\n");
	686	cleanup_exit(1);
	687	}
	688
	689	do {
	690	ret = do_eventsel_loop(ctx->event);
	691
	692	/* Error return can only occur if netevent==NULL, and it ain't. */
	693	assert(ret >= 0);
	694	} while (ret == 0);
	695
	696	return ctx->line;
	697	}
	698
799dfcfa	699	/* ----------------------------------------------------------------------
d6cc41e6	700	* Main program. Parse arguments etc.
	701	*/
	702	int main(int argc, char *argv[])
	703	{
	704	int ret;
	705
d6cc41e6	706	ret = psftp_main(argc, argv);
d6cc41e6	707
	708	return ret;
	709	}