[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 "ssh.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, Conf *conf)
{
    /* 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) do { \
    ULARGE_INTEGER uli; \
    uli.QuadPart = ((ULONGLONG)(t) + 11644473600ull) * 10000000ull; \
    (ft).dwLowDateTime  = uli.LowPart; \
    (ft).dwHighDateTime = uli.HighPart; \
} while(0)
#define TIME_WIN_TO_POSIX(ft, t) do { \
    ULARGE_INTEGER uli; \
    uli.LowPart  = (ft).dwLowDateTime; \
    uli.HighPart = (ft).dwHighDateTime; \
    uli.QuadPart = uli.QuadPart / 10000000ull - 11644473600ull; \
    (t) = (unsigned long) uli.QuadPart; \
} while(0)

struct RFile {
    HANDLE h;
};

RFile *open_existing_file(char *name, uint64 *size,
			  unsigned long *mtime, unsigned long *atime,
                          long *perms)
{
    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);
    }

    if (perms)
        *perms = -1;

    return ret;
}

int read_from_file(RFile *f, void *buffer, int length)
{
    int ret;
    DWORD 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, long perms)
{
    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;
    DWORD 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;
    unsigned long next, then;
    long ticks;
    HANDLE *handles;
    SOCKET *sklist;
    int skcount;
    unsigned long now = GETTICKCOUNT();

    if (run_timers(now, &next)) {
	then = now;
	now = GETTICKCOUNT();
	if (now - then > next - then)
	    ticks = 0;
	else
	    ticks = next - now;
    } 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;
	unsigned long now = GETTICKCOUNT(), then;

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

	    if (run_timers(now, &next)) {
		then = now;
		now = GETTICKCOUNT();
		if (now - then > next - then)
		    ticks = 0;
		else
		    ticks = next - now;
		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"
1af5ad55	9	#include "ssh.h"
0ac1920c	10	#include "int64.h"
c6ccd5c2	11
c6ccd5c2	12	char get_ttymode(void frontend, const char *mode) { return NULL; }
edd0cb8a	13
	14	int get_userpass_input(prompts_t p, unsigned char in, int inlen)
	15	{
	16	int ret;
	17	ret = cmdline_get_passwd_input(p, in, inlen);
	18	if (ret == -1)
	19	ret = console_get_userpass_input(p, in, inlen);
	20	return ret;
	21	}
d6cc41e6	22
4a693cfc	23	void platform_get_x11_auth(struct X11Display display, Conf conf)
8def70c3	24	{
	25	/* Do nothing, therefore no auth. */
	26	}
	27	const int platform_uses_x11_unix_by_default = TRUE;
	28
799dfcfa	29	/* ----------------------------------------------------------------------
	30	* File access abstraction.
	31	*/
	32
d6cc41e6	33	/*
	34	* Set local current directory. Returns NULL on success, or else an
	35	* error message which must be freed after printing.
	36	*/
	37	char psftp_lcd(char dir)
	38	{
	39	char *ret = NULL;
	40
	41	if (!SetCurrentDirectory(dir)) {
	42	LPVOID message;
	43	int i;
	44	FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER \|
	45	FORMAT_MESSAGE_FROM_SYSTEM \|
	46	FORMAT_MESSAGE_IGNORE_INSERTS,
	47	NULL, GetLastError(),
	48	MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
	49	(LPTSTR)&message, 0, NULL);
	50	i = strcspn((char *)message, "\n");
	51	ret = dupprintf("%.*s", i, (LPCTSTR)message);
	52	LocalFree(message);
	53	}
	54
	55	return ret;
	56	}
	57
	58	/*
	59	* Get local current directory. Returns a string which must be
	60	* freed.
	61	*/
	62	char *psftp_getcwd(void)
	63	{
	64	char *ret = snewn(256, char);
	65	int len = GetCurrentDirectory(256, ret);
	66	if (len > 256)
	67	ret = sresize(ret, len, char);
	68	GetCurrentDirectory(len, ret);
	69	return ret;
	70	}
	71
2763b64b	72	#define TIME_POSIX_TO_WIN(t, ft) do { \
	73	ULARGE_INTEGER uli; \
	74	uli.QuadPart = ((ULONGLONG)(t) + 11644473600ull) * 10000000ull; \
	75	(ft).dwLowDateTime = uli.LowPart; \
	76	(ft).dwHighDateTime = uli.HighPart; \
	77	} while(0)
	78	#define TIME_WIN_TO_POSIX(ft, t) do { \
	79	ULARGE_INTEGER uli; \
	80	uli.LowPart = (ft).dwLowDateTime; \
	81	uli.HighPart = (ft).dwHighDateTime; \
	82	uli.QuadPart = uli.QuadPart / 10000000ull - 11644473600ull; \
	83	(t) = (unsigned long) uli.QuadPart; \
	84	} while(0)
799dfcfa	85
	86	struct RFile {
	87	HANDLE h;
	88	};
	89
0ac1920c	90	RFile open_existing_file(char name, uint64 *size,
ee07dce4	91	unsigned long mtime, unsigned long atime,
ee07dce4	92	long *perms)
799dfcfa	93	{
	94	HANDLE h;
	95	RFile *ret;
	96
	97	h = CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL,
	98	OPEN_EXISTING, 0, 0);
	99	if (h == INVALID_HANDLE_VALUE)
	100	return NULL;
	101
	102	ret = snew(RFile);
	103	ret->h = h;
	104
	105	if (size)
0ac1920c	106	size->lo=GetFileSize(h, &(size->hi));
799dfcfa	107
	108	if (mtime \|\| atime) {
	109	FILETIME actime, wrtime;
	110	GetFileTime(h, NULL, &actime, &wrtime);
	111	if (atime)
	112	TIME_WIN_TO_POSIX(actime, *atime);
	113	if (mtime)
	114	TIME_WIN_TO_POSIX(wrtime, *mtime);
	115	}
	116
ee07dce4	117	if (perms)
	118	*perms = -1;
	119
799dfcfa	120	return ret;
	121	}
	122
	123	int read_from_file(RFile f, void buffer, int length)
	124	{
1af5ad55	125	int ret;
1af5ad55	126	DWORD read;
799dfcfa	127	ret = ReadFile(f->h, buffer, length, &read, NULL);
	128	if (!ret)
	129	return -1; /* error */
	130	else
	131	return read;
	132	}
	133
	134	void close_rfile(RFile *f)
	135	{
	136	CloseHandle(f->h);
	137	sfree(f);
	138	}
	139
	140	struct WFile {
	141	HANDLE h;
	142	};
	143
ee07dce4	144	WFile open_new_file(char name, long perms)
799dfcfa	145	{
	146	HANDLE h;
	147	WFile *ret;
	148
	149	h = CreateFile(name, GENERIC_WRITE, 0, NULL,
	150	CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
	151	if (h == INVALID_HANDLE_VALUE)
	152	return NULL;
	153
	154	ret = snew(WFile);
	155	ret->h = h;
	156
	157	return ret;
	158	}
	159
0ac1920c	160	WFile open_existing_wfile(char name, uint64 *size)
	161	{
	162	HANDLE h;
	163	WFile *ret;
	164
	165	h = CreateFile(name, GENERIC_WRITE, FILE_SHARE_READ, NULL,
	166	OPEN_EXISTING, 0, 0);
	167	if (h == INVALID_HANDLE_VALUE)
	168	return NULL;
	169
	170	ret = snew(WFile);
	171	ret->h = h;
	172
	173	if (size)
	174	size->lo=GetFileSize(h, &(size->hi));
	175
	176	return ret;
	177	}
	178
799dfcfa	179	int write_to_file(WFile f, void buffer, int length)
799dfcfa	180	{
1af5ad55	181	int ret;
1af5ad55	182	DWORD written;
799dfcfa	183	ret = WriteFile(f->h, buffer, length, &written, NULL);
	184	if (!ret)
	185	return -1; /* error */
	186	else
	187	return written;
	188	}
	189
	190	void set_file_times(WFile *f, unsigned long mtime, unsigned long atime)
	191	{
	192	FILETIME actime, wrtime;
	193	TIME_POSIX_TO_WIN(atime, actime);
	194	TIME_POSIX_TO_WIN(mtime, wrtime);
	195	SetFileTime(f->h, NULL, &actime, &wrtime);
	196	}
	197
	198	void close_wfile(WFile *f)
	199	{
	200	CloseHandle(f->h);
	201	sfree(f);
	202	}
	203
0ac1920c	204	/* Seek offset bytes through file, from whence, where whence is
	205	FROM_START, FROM_CURRENT, or FROM_END */
	206	int seek_file(WFile *f, uint64 offset, int whence)
	207	{
	208	DWORD movemethod;
	209
	210	switch (whence) {
	211	case FROM_START:
	212	movemethod = FILE_BEGIN;
	213	break;
	214	case FROM_CURRENT:
	215	movemethod = FILE_CURRENT;
	216	break;
	217	case FROM_END:
	218	movemethod = FILE_END;
	219	break;
	220	default:
	221	return -1;
	222	}
	223
	224	SetFilePointer(f->h, offset.lo, &(offset.hi), movemethod);
	225
	226	if (GetLastError() != NO_ERROR)
	227	return -1;
	228	else
	229	return 0;
	230	}
	231
	232	uint64 get_file_posn(WFile *f)
	233	{
	234	uint64 ret;
	235
	236	ret.hi = 0L;
	237	ret.lo = SetFilePointer(f->h, 0L, &(ret.hi), FILE_CURRENT);
	238
	239	return ret;
	240	}
	241
799dfcfa	242	int file_type(char *name)
	243	{
	244	DWORD attr;
	245	attr = GetFileAttributes(name);
	246	/* We know of no `weird' files under Windows. */
	247	if (attr == (DWORD)-1)
	248	return FILE_TYPE_NONEXISTENT;
	249	else if (attr & FILE_ATTRIBUTE_DIRECTORY)
	250	return FILE_TYPE_DIRECTORY;
	251	else
	252	return FILE_TYPE_FILE;
	253	}
	254
	255	struct DirHandle {
	256	HANDLE h;
	257	char *name;
	258	};
	259
	260	DirHandle open_directory(char name)
	261	{
	262	HANDLE h;
	263	WIN32_FIND_DATA fdat;
	264	char *findfile;
	265	DirHandle *ret;
	266
8f0ebed4	267	/* Enumerate files in dir `foo'. */
799dfcfa	268	findfile = dupcat(name, "/*", NULL);
	269	h = FindFirstFile(findfile, &fdat);
	270	if (h == INVALID_HANDLE_VALUE)
	271	return NULL;
8c7d710c	272	sfree(findfile);
799dfcfa	273
	274	ret = snew(DirHandle);
	275	ret->h = h;
	276	ret->name = dupstr(fdat.cFileName);
	277	return ret;
	278	}
	279
	280	char read_filename(DirHandle dir)
	281	{
b0e15bb5	282	do {
	283
	284	if (!dir->name) {
	285	WIN32_FIND_DATA fdat;
	286	int ok = FindNextFile(dir->h, &fdat);
	287	if (!ok)
	288	return NULL;
	289	else
	290	dir->name = dupstr(fdat.cFileName);
	291	}
	292
	293	assert(dir->name);
	294	if (dir->name[0] == '.' &&
	295	(dir->name[1] == '\0' \|\|
	296	(dir->name[1] == '.' && dir->name[2] == '\0'))) {
	297	sfree(dir->name);
8c7d710c	298	dir->name = NULL;
b0e15bb5	299	}
	300
	301	} while (!dir->name);
799dfcfa	302
	303	if (dir->name) {
	304	char *ret = dir->name;
	305	dir->name = NULL;
	306	return ret;
	307	} else
	308	return NULL;
	309	}
	310
	311	void close_directory(DirHandle *dir)
	312	{
	313	FindClose(dir->h);
	314	if (dir->name)
	315	sfree(dir->name);
	316	sfree(dir);
	317	}
	318
	319	int test_wildcard(char *name, int cmdline)
	320	{
	321	HANDLE fh;
	322	WIN32_FIND_DATA fdat;
	323
	324	/* First see if the exact name exists. */
	325	if (GetFileAttributes(name) != (DWORD)-1)
	326	return WCTYPE_FILENAME;
	327
	328	/* Otherwise see if a wildcard match finds anything. */
	329	fh = FindFirstFile(name, &fdat);
	330	if (fh == INVALID_HANDLE_VALUE)
	331	return WCTYPE_NONEXISTENT;
	332
	333	FindClose(fh);
	334	return WCTYPE_WILDCARD;
	335	}
	336
	337	struct WildcardMatcher {
	338	HANDLE h;
	339	char *name;
	340	char *srcpath;
	341	};
	342
	343	/*
	344	* Return a pointer to the portion of str that comes after the last
	345	* slash (or backslash or colon, if `local' is TRUE).
	346	*/
	347	static char stripslashes(char str, int local)
	348	{
	349	char *p;
	350
	351	if (local) {
	352	p = strchr(str, ':');
	353	if (p) str = p+1;
	354	}
	355
	356	p = strrchr(str, '/');
	357	if (p) str = p+1;
	358
	359	if (local) {
	360	p = strrchr(str, '\\');
	361	if (p) str = p+1;
	362	}
	363
	364	return str;
	365	}
366
367	WildcardMatcher begin_wildcard_matching(char name)
368	{
369	HANDLE h;
370	WIN32_FIND_DATA fdat;
371	WildcardMatcher *ret;
372	char *last;
373
374	h = FindFirstFile(name, &fdat);
375	if (h == INVALID_HANDLE_VALUE)
376	return NULL;
377
378	ret = snew(WildcardMatcher);
379	ret->h = h;
380	ret->srcpath = dupstr(name);
381	last = stripslashes(ret->srcpath, 1);
382	*last = '\0';
383	if (fdat.cFileName[0] == '.' &&
384	(fdat.cFileName[1] == '\0' \|\|
385	(fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0')))
386	ret->name = NULL;
387	else
388	ret->name = dupcat(ret->srcpath, fdat.cFileName, NULL);
389
390	return ret;
391	}
392
393	char wildcard_get_filename(WildcardMatcher dir)
394	{
395	while (!dir->name) {
396	WIN32_FIND_DATA fdat;
397	int ok = FindNextFile(dir->h, &fdat);
398
399	if (!ok)
400	return NULL;
401
402	if (fdat.cFileName[0] == '.' &&
403	(fdat.cFileName[1] == '\0' \|\|
404	(fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0')))
405	dir->name = NULL;
406	else
407	dir->name = dupcat(dir->srcpath, fdat.cFileName, NULL);
408	}
409
410	if (dir->name) {
411	char *ret = dir->name;
412	dir->name = NULL;
413	return ret;
414	} else
415	return NULL;
416	}
417
418	void finish_wildcard_matching(WildcardMatcher *dir)
419	{
420	FindClose(dir->h);
421	if (dir->name)
422	sfree(dir->name);
423	sfree(dir->srcpath);
424	sfree(dir);
425	}
426
e9d14678	427	int vet_filename(char *name)
	428	{
	429	if (strchr(name, '/') \|\| strchr(name, '\\') \|\| strchr(name, ':'))
	430	return FALSE;
	431
	432	if (!name[strspn(name, ".")]) /* entirely composed of dots */
	433	return FALSE;
	434
	435	return TRUE;
	436	}
	437
799dfcfa	438	int create_directory(char *name)
	439	{
	440	return CreateDirectory(name, NULL) != 0;
	441	}
	442
8c7d710c	443	char dir_file_cat(char dir, char *file)
	444	{
	445	return dupcat(dir, "\\", file, NULL);
	446	}
	447
799dfcfa	448	/* ----------------------------------------------------------------------
	449	* Platform-specific network handling.
	450	*/
	451
	452	/*
	453	* Be told what socket we're supposed to be using.
	454	*/
65857773	455	static SOCKET sftp_ssh_socket = INVALID_SOCKET;
4a0b6d61	456	static HANDLE netevent = INVALID_HANDLE_VALUE;
799dfcfa	457	char *do_select(SOCKET skt, int startup)
799dfcfa	458	{
39934deb	459	int events;
799dfcfa	460	if (startup)
	461	sftp_ssh_socket = skt;
	462	else
	463	sftp_ssh_socket = INVALID_SOCKET;
39934deb	464
	465	if (p_WSAEventSelect) {
	466	if (startup) {
	467	events = (FD_CONNECT \| FD_READ \| FD_WRITE \|
	468	FD_OOB \| FD_CLOSE \| FD_ACCEPT);
	469	netevent = CreateEvent(NULL, FALSE, FALSE, NULL);
	470	} else {
	471	events = 0;
	472	}
	473	if (p_WSAEventSelect(skt, netevent, events) == SOCKET_ERROR) {
	474	switch (p_WSAGetLastError()) {
	475	case WSAENETDOWN:
	476	return "Network is down";
	477	default:
	478	return "WSAEventSelect(): unknown error";
	479	}
	480	}
	481	}
799dfcfa	482	return NULL;
	483	}
	484	extern int select_result(WPARAM, LPARAM);
	485
39934deb	486	int do_eventsel_loop(HANDLE other_event)
39934deb	487	{
fbe6468e	488	int n, nhandles, nallhandles, netindex, otherindex;
d719927e	489	unsigned long next, then;
d719927e	490	long ticks;
34292b1d	491	HANDLE *handles;
39934deb	492	SOCKET *sklist;
39934deb	493	int skcount;
d719927e	494	unsigned long now = GETTICKCOUNT();
39934deb	495
fbe6468e	496	if (run_timers(now, &next)) {
d719927e	497	then = now;
	498	now = GETTICKCOUNT();
	499	if (now - then > next - then)
	500	ticks = 0;
	501	else
	502	ticks = next - now;
fbe6468e	503	} else {
fbe6468e	504	ticks = INFINITE;
39934deb	505	}
39934deb	506
34292b1d	507	handles = handle_get_events(&nhandles);
	508	handles = sresize(handles, nhandles+2, HANDLE);
	509	nallhandles = nhandles;
	510
4a0b6d61	511	if (netevent != INVALID_HANDLE_VALUE)
fbe6468e	512	handles[netindex = nallhandles++] = netevent;
	513	else
	514	netindex = -1;
4a0b6d61	515	if (other_event != INVALID_HANDLE_VALUE)
fbe6468e	516	handles[otherindex = nallhandles++] = other_event;
	517	else
	518	otherindex = -1;
39934deb	519
4d6848ce	520	n = WaitForMultipleObjects(nallhandles, handles, FALSE, ticks);
39934deb	521
34292b1d	522	if ((unsigned)(n - WAIT_OBJECT_0) < (unsigned)nhandles) {
34292b1d	523	handle_got_event(handles[n - WAIT_OBJECT_0]);
fbe6468e	524	} else if (netindex >= 0 && n == WAIT_OBJECT_0 + netindex) {
39934deb	525	WSANETWORKEVENTS things;
	526	SOCKET socket;
	527	extern SOCKET first_socket(int ), next_socket(int );
	528	extern int select_result(WPARAM, LPARAM);
	529	int i, socketstate;
	530
	531	/*
	532	* We must not call select_result() for any socket
	533	* until we have finished enumerating within the
	534	* tree. This is because select_result() may close
	535	* the socket and modify the tree.
	536	*/
	537	/* Count the active sockets. */
	538	i = 0;
	539	for (socket = first_socket(&socketstate);
	540	socket != INVALID_SOCKET;
	541	socket = next_socket(&socketstate)) i++;
	542
	543	/* Expand the buffer if necessary. */
	544	sklist = snewn(i, SOCKET);
	545
	546	/* Retrieve the sockets into sklist. */
	547	skcount = 0;
	548	for (socket = first_socket(&socketstate);
	549	socket != INVALID_SOCKET;
	550	socket = next_socket(&socketstate)) {
	551	sklist[skcount++] = socket;
	552	}
	553
	554	/* Now we're done enumerating; go through the list. */
	555	for (i = 0; i < skcount; i++) {
	556	WPARAM wp;
	557	socket = sklist[i];
	558	wp = (WPARAM) socket;
	559	if (!p_WSAEnumNetworkEvents(socket, NULL, &things)) {
	560	static const struct { int bit, mask; } eventtypes[] = {
	561	{FD_CONNECT_BIT, FD_CONNECT},
	562	{FD_READ_BIT, FD_READ},
	563	{FD_CLOSE_BIT, FD_CLOSE},
	564	{FD_OOB_BIT, FD_OOB},
	565	{FD_WRITE_BIT, FD_WRITE},
	566	{FD_ACCEPT_BIT, FD_ACCEPT},
	567	};
	568	int e;
	569
	570	noise_ultralight(socket);
	571	noise_ultralight(things.lNetworkEvents);
	572
	573	for (e = 0; e < lenof(eventtypes); e++)
	574	if (things.lNetworkEvents & eventtypes[e].mask) {
	575	LPARAM lp;
	576	int err = things.iErrorCode[eventtypes[e].bit];
	577	lp = WSAMAKESELECTREPLY(eventtypes[e].mask, err);
	578	select_result(wp, lp);
	579	}
	580	}
	581	}
	582
	583	sfree(sklist);
	584	}
	585
34292b1d	586	sfree(handles);
34292b1d	587
39934deb	588	if (n == WAIT_TIMEOUT) {
	589	now = next;
	590	} else {
	591	now = GETTICKCOUNT();
	592	}
	593
fbe6468e	594	if (otherindex >= 0 && n == WAIT_OBJECT_0 + otherindex)
39934deb	595	return 1;
	596
	597	return 0;
	598	}
	599
799dfcfa	600	/*
d6cc41e6	601	* Wait for some network data and process it.
39934deb	602	*
	603	* We have two variants of this function. One uses select() so that
	604	* it's compatible with WinSock 1. The other uses WSAEventSelect
	605	* and MsgWaitForMultipleObjects, so that we can consistently use
	606	* WSAEventSelect throughout; this enables us to also implement
	607	* ssh_sftp_get_cmdline() using a parallel mechanism.
d6cc41e6	608	*/
	609	int ssh_sftp_loop_iteration(void)
	610	{
39934deb	611	if (p_WSAEventSelect == NULL) {
	612	fd_set readfds;
	613	int ret;
1172a92b	614	unsigned long now = GETTICKCOUNT(), then;
39934deb	615
fbe6468e	616	if (sftp_ssh_socket == INVALID_SOCKET)
	617	return -1; /* doom */
	618
39934deb	619	if (socket_writable(sftp_ssh_socket))
	620	select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_WRITE);
	621
	622	do {
1172a92b	623	unsigned long next;
1172a92b	624	long ticks;
39934deb	625	struct timeval tv, *ptv;
	626
	627	if (run_timers(now, &next)) {
1172a92b	628	then = now;
	629	now = GETTICKCOUNT();
	630	if (now - then > next - then)
	631	ticks = 0;
	632	else
	633	ticks = next - now;
39934deb	634	tv.tv_sec = ticks / 1000;
	635	tv.tv_usec = ticks % 1000 * 1000;
	636	ptv = &tv;
	637	} else {
	638	ptv = NULL;
	639	}
	640
	641	FD_ZERO(&readfds);
	642	FD_SET(sftp_ssh_socket, &readfds);
	643	ret = p_select(1, &readfds, NULL, NULL, ptv);
	644
	645	if (ret < 0)
	646	return -1; /* doom */
	647	else if (ret == 0)
	648	now = next;
	649	else
	650	now = GETTICKCOUNT();
	651
	652	} while (ret == 0);
	653
	654	select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ);
	655
	656	return 0;
	657	} else {
4a0b6d61	658	return do_eventsel_loop(INVALID_HANDLE_VALUE);
39934deb	659	}
	660	}
	661
	662	/*
	663	* Read a command line from standard input.
	664	*
	665	* In the presence of WinSock 2, we can use WSAEventSelect to
	666	* mediate between the socket and stdin, meaning we can send
	667	* keepalives and respond to server events even while waiting at
	668	* the PSFTP command prompt. Without WS2, we fall back to a simple
	669	* fgets.
	670	*/
	671	struct command_read_ctx {
	672	HANDLE event;
	673	char *line;
	674	};
	675
	676	static DWORD WINAPI command_read_thread(void *param)
	677	{
	678	struct command_read_ctx ctx = (struct command_read_ctx ) param;
	679
	680	ctx->line = fgetline(stdin);
	681
	682	SetEvent(ctx->event);
d6cc41e6	683
d6cc41e6	684	return 0;
	685	}
	686
65857773	687	char ssh_sftp_get_cmdline(char prompt, int no_fds_ok)
39934deb	688	{
	689	int ret;
	690	struct command_read_ctx actx, *ctx = &actx;
	691	DWORD threadid;
	692
	693	fputs(prompt, stdout);
	694	fflush(stdout);
	695
65857773	696	if ((sftp_ssh_socket == INVALID_SOCKET && no_fds_ok) \|\|
65857773	697	p_WSAEventSelect == NULL) {
39934deb	698	return fgetline(stdin); /* very simple */
	699	}
	700
	701	/*
	702	* Create a second thread to read from stdin. Process network
	703	* and timing events until it terminates.
	704	*/
	705	ctx->event = CreateEvent(NULL, FALSE, FALSE, NULL);
	706	ctx->line = NULL;
	707
	708	if (!CreateThread(NULL, 0, command_read_thread,
	709	ctx, 0, &threadid)) {
	710	fprintf(stderr, "Unable to create command input thread\n");
	711	cleanup_exit(1);
	712	}
	713
	714	do {
	715	ret = do_eventsel_loop(ctx->event);
	716
	717	/* Error return can only occur if netevent==NULL, and it ain't. */
	718	assert(ret >= 0);
	719	} while (ret == 0);
	720
	721	return ctx->line;
	722	}
	723
799dfcfa	724	/* ----------------------------------------------------------------------
d6cc41e6	725	* Main program. Parse arguments etc.
	726	*/
	727	int main(int argc, char *argv[])
	728	{
	729	int ret;
	730
d6cc41e6	731	ret = psftp_main(argc, argv);
d6cc41e6	732
	733	return ret;
	734	}