blob: a4c4f168fc3f929827a04626f8ae579f8c6bae3f [file] [log] [blame]
Damien Miller9e720282008-06-29 22:46:35 +10001/* $OpenBSD: sftp-server.c,v 1.84 2008/06/26 06:10:09 djm Exp $ */
Damien Miller7b28dc52000-09-05 13:34:53 +11002/*
Darren Tucker37bd3662004-02-24 09:19:15 +11003 * Copyright (c) 2000-2004 Markus Friedl. All rights reserved.
Damien Miller7b28dc52000-09-05 13:34:53 +11004 *
Darren Tucker37bd3662004-02-24 09:19:15 +11005 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
Damien Miller7b28dc52000-09-05 13:34:53 +11008 *
Darren Tucker37bd3662004-02-24 09:19:15 +11009 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
Damien Miller7b28dc52000-09-05 13:34:53 +110016 */
Damien Millerd7834352006-08-05 12:39:39 +100017
Damien Miller7b28dc52000-09-05 13:34:53 +110018#include "includes.h"
Damien Millerf17883e2006-03-15 11:45:54 +110019
20#include <sys/types.h>
Damien Miller8dbffe72006-08-05 11:02:17 +100021#include <sys/param.h>
Damien Millerf17883e2006-03-15 11:45:54 +110022#include <sys/stat.h>
Damien Miller9aec9192006-08-05 10:57:45 +100023#ifdef HAVE_SYS_TIME_H
24# include <sys/time.h>
25#endif
Darren Tucker5b2e2ba2008-06-08 09:25:28 +100026#ifdef HAVE_SYS_MOUNT_H
Damien Millerd671e5a2008-05-19 14:53:33 +100027#include <sys/mount.h>
Darren Tucker5b2e2ba2008-06-08 09:25:28 +100028#endif
29#ifdef HAVE_SYS_STATVFS_H
Damien Millerd671e5a2008-05-19 14:53:33 +100030#include <sys/statvfs.h>
Darren Tucker5b2e2ba2008-06-08 09:25:28 +100031#endif
Damien Miller88f254b2006-03-15 11:25:13 +110032
33#include <dirent.h>
Darren Tucker39972492006-07-12 22:22:46 +100034#include <errno.h>
Damien Miller57cf6382006-07-10 21:13:46 +100035#include <fcntl.h>
Damien Miller9f2abc42006-07-10 20:53:08 +100036#include <pwd.h>
Damien Millere7a1e5c2006-08-05 11:34:19 +100037#include <stdlib.h>
Damien Millera7a73ee2006-08-05 11:37:59 +100038#include <stdio.h>
Damien Millere3476ed2006-07-24 14:13:33 +100039#include <string.h>
Damien Millerd7834352006-08-05 12:39:39 +100040#include <pwd.h>
Damien Miller5598b4f2006-07-24 14:09:40 +100041#include <time.h>
Damien Millere3476ed2006-07-24 14:13:33 +100042#include <unistd.h>
Damien Millerd7834352006-08-05 12:39:39 +100043#include <stdarg.h>
Damien Miller7b28dc52000-09-05 13:34:53 +110044
Damien Miller7b28dc52000-09-05 13:34:53 +110045#include "xmalloc.h"
Damien Millerd7834352006-08-05 12:39:39 +100046#include "buffer.h"
47#include "log.h"
Darren Tuckerce321d82005-10-03 18:11:24 +100048#include "misc.h"
Damien Millerfef95ad2006-07-10 20:46:55 +100049#include "uidswap.h"
Damien Miller7b28dc52000-09-05 13:34:53 +110050
Ben Lindstrom2f959b42001-01-11 06:20:23 +000051#include "sftp.h"
Damien Miller33804262001-02-04 23:20:18 +110052#include "sftp-common.h"
Damien Miller7b28dc52000-09-05 13:34:53 +110053
54/* helper */
Ben Lindstrom2f959b42001-01-11 06:20:23 +000055#define get_int64() buffer_get_int64(&iqueue);
Damien Miller7b28dc52000-09-05 13:34:53 +110056#define get_int() buffer_get_int(&iqueue);
57#define get_string(lenp) buffer_get_string(&iqueue, lenp);
Damien Miller7b28dc52000-09-05 13:34:53 +110058
Damien Millerfef95ad2006-07-10 20:46:55 +100059/* Our verbosity */
60LogLevel log_level = SYSLOG_LEVEL_ERROR;
61
62/* Our client */
63struct passwd *pw = NULL;
64char *client_addr = NULL;
Ben Lindstrom49a79c02000-11-17 03:47:20 +000065
Damien Miller7b28dc52000-09-05 13:34:53 +110066/* input and output queue */
67Buffer iqueue;
68Buffer oqueue;
69
Damien Miller058316f2001-03-08 10:08:49 +110070/* Version of client */
71int version;
72
Darren Tuckera6612d42003-06-28 12:39:03 +100073/* portable attributes, etc. */
Damien Miller7b28dc52000-09-05 13:34:53 +110074
Damien Miller7b28dc52000-09-05 13:34:53 +110075typedef struct Stat Stat;
76
Damien Miller33804262001-02-04 23:20:18 +110077struct Stat {
Damien Miller7b28dc52000-09-05 13:34:53 +110078 char *name;
79 char *long_name;
80 Attrib attrib;
81};
82
Ben Lindstrombba81212001-06-25 05:01:22 +000083static int
Damien Miller7b28dc52000-09-05 13:34:53 +110084errno_to_portable(int unixerrno)
85{
86 int ret = 0;
Ben Lindstrom1addabd2001-03-05 07:09:11 +000087
Damien Miller7b28dc52000-09-05 13:34:53 +110088 switch (unixerrno) {
89 case 0:
Ben Lindstrom2f959b42001-01-11 06:20:23 +000090 ret = SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +110091 break;
92 case ENOENT:
93 case ENOTDIR:
94 case EBADF:
95 case ELOOP:
Ben Lindstrom2f959b42001-01-11 06:20:23 +000096 ret = SSH2_FX_NO_SUCH_FILE;
Damien Miller7b28dc52000-09-05 13:34:53 +110097 break;
98 case EPERM:
99 case EACCES:
100 case EFAULT:
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000101 ret = SSH2_FX_PERMISSION_DENIED;
Damien Miller7b28dc52000-09-05 13:34:53 +1100102 break;
103 case ENAMETOOLONG:
104 case EINVAL:
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000105 ret = SSH2_FX_BAD_MESSAGE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100106 break;
Darren Tucker422c34c2008-06-09 22:48:31 +1000107 case ENOSYS:
108 ret = SSH2_FX_OP_UNSUPPORTED;
109 break;
Damien Miller7b28dc52000-09-05 13:34:53 +1100110 default:
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000111 ret = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100112 break;
113 }
114 return ret;
115}
116
Ben Lindstrombba81212001-06-25 05:01:22 +0000117static int
Damien Miller7b28dc52000-09-05 13:34:53 +1100118flags_from_portable(int pflags)
119{
120 int flags = 0;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000121
Ben Lindstrom36592512001-03-05 05:02:08 +0000122 if ((pflags & SSH2_FXF_READ) &&
123 (pflags & SSH2_FXF_WRITE)) {
Damien Miller7b28dc52000-09-05 13:34:53 +1100124 flags = O_RDWR;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000125 } else if (pflags & SSH2_FXF_READ) {
Damien Miller7b28dc52000-09-05 13:34:53 +1100126 flags = O_RDONLY;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000127 } else if (pflags & SSH2_FXF_WRITE) {
Damien Miller7b28dc52000-09-05 13:34:53 +1100128 flags = O_WRONLY;
129 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000130 if (pflags & SSH2_FXF_CREAT)
Damien Miller7b28dc52000-09-05 13:34:53 +1100131 flags |= O_CREAT;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000132 if (pflags & SSH2_FXF_TRUNC)
Damien Miller7b28dc52000-09-05 13:34:53 +1100133 flags |= O_TRUNC;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000134 if (pflags & SSH2_FXF_EXCL)
Damien Miller7b28dc52000-09-05 13:34:53 +1100135 flags |= O_EXCL;
136 return flags;
137}
138
Damien Millerfef95ad2006-07-10 20:46:55 +1000139static const char *
140string_from_portable(int pflags)
141{
142 static char ret[128];
143
144 *ret = '\0';
145
146#define PAPPEND(str) { \
147 if (*ret != '\0') \
148 strlcat(ret, ",", sizeof(ret)); \
Damien Millerd7834352006-08-05 12:39:39 +1000149 strlcat(ret, str, sizeof(ret)); \
Damien Millerfef95ad2006-07-10 20:46:55 +1000150 }
151
152 if (pflags & SSH2_FXF_READ)
153 PAPPEND("READ")
154 if (pflags & SSH2_FXF_WRITE)
155 PAPPEND("WRITE")
156 if (pflags & SSH2_FXF_CREAT)
157 PAPPEND("CREATE")
158 if (pflags & SSH2_FXF_TRUNC)
159 PAPPEND("TRUNCATE")
160 if (pflags & SSH2_FXF_EXCL)
161 PAPPEND("EXCL")
162
163 return ret;
164}
165
Ben Lindstrombba81212001-06-25 05:01:22 +0000166static Attrib *
Damien Miller7b28dc52000-09-05 13:34:53 +1100167get_attrib(void)
168{
169 return decode_attrib(&iqueue);
170}
171
172/* handle handles */
173
174typedef struct Handle Handle;
175struct Handle {
176 int use;
177 DIR *dirp;
178 int fd;
179 char *name;
Damien Millerfef95ad2006-07-10 20:46:55 +1000180 u_int64_t bytes_read, bytes_write;
Damien Miller3397d0e2008-02-10 22:26:51 +1100181 int next_unused;
Damien Miller7b28dc52000-09-05 13:34:53 +1100182};
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000183
Damien Miller7b28dc52000-09-05 13:34:53 +1100184enum {
185 HANDLE_UNUSED,
186 HANDLE_DIR,
187 HANDLE_FILE
188};
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000189
Damien Miller3397d0e2008-02-10 22:26:51 +1100190Handle *handles = NULL;
191u_int num_handles = 0;
192int first_unused_handle = -1;
Damien Miller7b28dc52000-09-05 13:34:53 +1100193
Damien Miller3397d0e2008-02-10 22:26:51 +1100194static void handle_unused(int i)
Damien Miller7b28dc52000-09-05 13:34:53 +1100195{
Damien Miller3397d0e2008-02-10 22:26:51 +1100196 handles[i].use = HANDLE_UNUSED;
197 handles[i].next_unused = first_unused_handle;
198 first_unused_handle = i;
Damien Miller7b28dc52000-09-05 13:34:53 +1100199}
200
Ben Lindstrombba81212001-06-25 05:01:22 +0000201static int
Damien Millerf58b58c2003-11-17 21:18:23 +1100202handle_new(int use, const char *name, int fd, DIR *dirp)
Damien Miller7b28dc52000-09-05 13:34:53 +1100203{
Damien Miller3397d0e2008-02-10 22:26:51 +1100204 int i;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000205
Damien Miller3397d0e2008-02-10 22:26:51 +1100206 if (first_unused_handle == -1) {
207 if (num_handles + 1 <= num_handles)
208 return -1;
209 num_handles++;
210 handles = xrealloc(handles, num_handles, sizeof(Handle));
211 handle_unused(num_handles - 1);
Damien Miller7b28dc52000-09-05 13:34:53 +1100212 }
Damien Miller3397d0e2008-02-10 22:26:51 +1100213
214 i = first_unused_handle;
215 first_unused_handle = handles[i].next_unused;
216
217 handles[i].use = use;
218 handles[i].dirp = dirp;
219 handles[i].fd = fd;
220 handles[i].name = xstrdup(name);
221 handles[i].bytes_read = handles[i].bytes_write = 0;
222
223 return i;
Damien Miller7b28dc52000-09-05 13:34:53 +1100224}
225
Ben Lindstrombba81212001-06-25 05:01:22 +0000226static int
Damien Miller7b28dc52000-09-05 13:34:53 +1100227handle_is_ok(int i, int type)
228{
Damien Miller3397d0e2008-02-10 22:26:51 +1100229 return i >= 0 && (u_int)i < num_handles && handles[i].use == type;
Damien Miller7b28dc52000-09-05 13:34:53 +1100230}
231
Ben Lindstrombba81212001-06-25 05:01:22 +0000232static int
Damien Miller7b28dc52000-09-05 13:34:53 +1100233handle_to_string(int handle, char **stringp, int *hlenp)
234{
Damien Miller7b28dc52000-09-05 13:34:53 +1100235 if (stringp == NULL || hlenp == NULL)
236 return -1;
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000237 *stringp = xmalloc(sizeof(int32_t));
Damien Miller3f941882006-03-31 23:13:02 +1100238 put_u32(*stringp, handle);
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000239 *hlenp = sizeof(int32_t);
Damien Miller7b28dc52000-09-05 13:34:53 +1100240 return 0;
241}
242
Ben Lindstrombba81212001-06-25 05:01:22 +0000243static int
Damien Millerf58b58c2003-11-17 21:18:23 +1100244handle_from_string(const char *handle, u_int hlen)
Damien Miller7b28dc52000-09-05 13:34:53 +1100245{
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000246 int val;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000247
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000248 if (hlen != sizeof(int32_t))
Damien Miller7b28dc52000-09-05 13:34:53 +1100249 return -1;
Damien Miller3f941882006-03-31 23:13:02 +1100250 val = get_u32(handle);
Damien Miller7b28dc52000-09-05 13:34:53 +1100251 if (handle_is_ok(val, HANDLE_FILE) ||
252 handle_is_ok(val, HANDLE_DIR))
253 return val;
254 return -1;
255}
256
Ben Lindstrombba81212001-06-25 05:01:22 +0000257static char *
Damien Miller7b28dc52000-09-05 13:34:53 +1100258handle_to_name(int handle)
259{
260 if (handle_is_ok(handle, HANDLE_DIR)||
261 handle_is_ok(handle, HANDLE_FILE))
262 return handles[handle].name;
263 return NULL;
264}
265
Ben Lindstrombba81212001-06-25 05:01:22 +0000266static DIR *
Damien Miller7b28dc52000-09-05 13:34:53 +1100267handle_to_dir(int handle)
268{
269 if (handle_is_ok(handle, HANDLE_DIR))
270 return handles[handle].dirp;
271 return NULL;
272}
273
Ben Lindstrombba81212001-06-25 05:01:22 +0000274static int
Damien Miller7b28dc52000-09-05 13:34:53 +1100275handle_to_fd(int handle)
276{
Kevin Stevesef4eea92001-02-05 12:42:17 +0000277 if (handle_is_ok(handle, HANDLE_FILE))
Damien Miller7b28dc52000-09-05 13:34:53 +1100278 return handles[handle].fd;
279 return -1;
280}
281
Damien Millerfef95ad2006-07-10 20:46:55 +1000282static void
283handle_update_read(int handle, ssize_t bytes)
284{
285 if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0)
286 handles[handle].bytes_read += bytes;
287}
288
289static void
290handle_update_write(int handle, ssize_t bytes)
291{
292 if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0)
293 handles[handle].bytes_write += bytes;
294}
295
296static u_int64_t
297handle_bytes_read(int handle)
298{
299 if (handle_is_ok(handle, HANDLE_FILE))
300 return (handles[handle].bytes_read);
301 return 0;
302}
303
304static u_int64_t
305handle_bytes_write(int handle)
306{
307 if (handle_is_ok(handle, HANDLE_FILE))
308 return (handles[handle].bytes_write);
309 return 0;
310}
311
Ben Lindstrombba81212001-06-25 05:01:22 +0000312static int
Damien Miller7b28dc52000-09-05 13:34:53 +1100313handle_close(int handle)
314{
315 int ret = -1;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000316
Damien Miller7b28dc52000-09-05 13:34:53 +1100317 if (handle_is_ok(handle, HANDLE_FILE)) {
318 ret = close(handles[handle].fd);
Damien Miller00111382003-03-10 11:21:17 +1100319 xfree(handles[handle].name);
Damien Miller3397d0e2008-02-10 22:26:51 +1100320 handle_unused(handle);
Damien Miller7b28dc52000-09-05 13:34:53 +1100321 } else if (handle_is_ok(handle, HANDLE_DIR)) {
322 ret = closedir(handles[handle].dirp);
Damien Miller00111382003-03-10 11:21:17 +1100323 xfree(handles[handle].name);
Damien Miller3397d0e2008-02-10 22:26:51 +1100324 handle_unused(handle);
Damien Miller7b28dc52000-09-05 13:34:53 +1100325 } else {
326 errno = ENOENT;
327 }
328 return ret;
329}
330
Damien Millerfef95ad2006-07-10 20:46:55 +1000331static void
332handle_log_close(int handle, char *emsg)
333{
334 if (handle_is_ok(handle, HANDLE_FILE)) {
335 logit("%s%sclose \"%s\" bytes read %llu written %llu",
336 emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ",
337 handle_to_name(handle),
Darren Tucker86473c52007-05-20 14:59:32 +1000338 (unsigned long long)handle_bytes_read(handle),
339 (unsigned long long)handle_bytes_write(handle));
Damien Millerfef95ad2006-07-10 20:46:55 +1000340 } else {
341 logit("%s%sclosedir \"%s\"",
342 emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ",
343 handle_to_name(handle));
344 }
345}
346
347static void
348handle_log_exit(void)
349{
350 u_int i;
351
Damien Miller3397d0e2008-02-10 22:26:51 +1100352 for (i = 0; i < num_handles; i++)
Damien Millerfef95ad2006-07-10 20:46:55 +1000353 if (handles[i].use != HANDLE_UNUSED)
354 handle_log_close(i, "forced");
355}
356
Ben Lindstrombba81212001-06-25 05:01:22 +0000357static int
Damien Miller7b28dc52000-09-05 13:34:53 +1100358get_handle(void)
359{
360 char *handle;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000361 int val = -1;
Damien Millere4340be2000-09-16 13:29:08 +1100362 u_int hlen;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000363
Damien Miller7b28dc52000-09-05 13:34:53 +1100364 handle = get_string(&hlen);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000365 if (hlen < 256)
366 val = handle_from_string(handle, hlen);
Damien Miller7b28dc52000-09-05 13:34:53 +1100367 xfree(handle);
368 return val;
369}
370
371/* send replies */
372
Ben Lindstrombba81212001-06-25 05:01:22 +0000373static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100374send_msg(Buffer *m)
375{
376 int mlen = buffer_len(m);
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000377
Damien Miller7b28dc52000-09-05 13:34:53 +1100378 buffer_put_int(&oqueue, mlen);
379 buffer_append(&oqueue, buffer_ptr(m), mlen);
380 buffer_consume(m, mlen);
381}
382
Damien Millerfef95ad2006-07-10 20:46:55 +1000383static const char *
384status_to_message(u_int32_t status)
Damien Miller7b28dc52000-09-05 13:34:53 +1100385{
Damien Miller058316f2001-03-08 10:08:49 +1100386 const char *status_messages[] = {
387 "Success", /* SSH_FX_OK */
388 "End of file", /* SSH_FX_EOF */
389 "No such file", /* SSH_FX_NO_SUCH_FILE */
390 "Permission denied", /* SSH_FX_PERMISSION_DENIED */
391 "Failure", /* SSH_FX_FAILURE */
392 "Bad message", /* SSH_FX_BAD_MESSAGE */
393 "No connection", /* SSH_FX_NO_CONNECTION */
394 "Connection lost", /* SSH_FX_CONNECTION_LOST */
395 "Operation unsupported", /* SSH_FX_OP_UNSUPPORTED */
396 "Unknown error" /* Others */
397 };
Damien Millerfef95ad2006-07-10 20:46:55 +1000398 return (status_messages[MIN(status,SSH2_FX_MAX)]);
399}
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000400
Damien Millerfef95ad2006-07-10 20:46:55 +1000401static void
402send_status(u_int32_t id, u_int32_t status)
403{
404 Buffer msg;
405
406 debug3("request %u: sent status %u", id, status);
407 if (log_level > SYSLOG_LEVEL_VERBOSE ||
408 (status != SSH2_FX_OK && status != SSH2_FX_EOF))
409 logit("sent status %s", status_to_message(status));
Damien Miller7b28dc52000-09-05 13:34:53 +1100410 buffer_init(&msg);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000411 buffer_put_char(&msg, SSH2_FXP_STATUS);
Damien Miller7b28dc52000-09-05 13:34:53 +1100412 buffer_put_int(&msg, id);
Darren Tucker3f9fdc72004-06-22 12:56:01 +1000413 buffer_put_int(&msg, status);
Damien Miller058316f2001-03-08 10:08:49 +1100414 if (version >= 3) {
Damien Millerfef95ad2006-07-10 20:46:55 +1000415 buffer_put_cstring(&msg, status_to_message(status));
Damien Miller058316f2001-03-08 10:08:49 +1100416 buffer_put_cstring(&msg, "");
417 }
Damien Miller7b28dc52000-09-05 13:34:53 +1100418 send_msg(&msg);
419 buffer_free(&msg);
420}
Ben Lindstrombba81212001-06-25 05:01:22 +0000421static void
Damien Millerf58b58c2003-11-17 21:18:23 +1100422send_data_or_handle(char type, u_int32_t id, const char *data, int dlen)
Damien Miller7b28dc52000-09-05 13:34:53 +1100423{
424 Buffer msg;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000425
Damien Miller7b28dc52000-09-05 13:34:53 +1100426 buffer_init(&msg);
427 buffer_put_char(&msg, type);
428 buffer_put_int(&msg, id);
429 buffer_put_string(&msg, data, dlen);
430 send_msg(&msg);
431 buffer_free(&msg);
432}
433
Ben Lindstrombba81212001-06-25 05:01:22 +0000434static void
Damien Millerf58b58c2003-11-17 21:18:23 +1100435send_data(u_int32_t id, const char *data, int dlen)
Damien Miller7b28dc52000-09-05 13:34:53 +1100436{
Damien Millerfef95ad2006-07-10 20:46:55 +1000437 debug("request %u: sent data len %d", id, dlen);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000438 send_data_or_handle(SSH2_FXP_DATA, id, data, dlen);
Damien Miller7b28dc52000-09-05 13:34:53 +1100439}
440
Ben Lindstrombba81212001-06-25 05:01:22 +0000441static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100442send_handle(u_int32_t id, int handle)
443{
444 char *string;
445 int hlen;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000446
Damien Miller7b28dc52000-09-05 13:34:53 +1100447 handle_to_string(handle, &string, &hlen);
Damien Millerfef95ad2006-07-10 20:46:55 +1000448 debug("request %u: sent handle handle %d", id, handle);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000449 send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen);
Damien Miller7b28dc52000-09-05 13:34:53 +1100450 xfree(string);
451}
452
Ben Lindstrombba81212001-06-25 05:01:22 +0000453static void
Damien Millerf58b58c2003-11-17 21:18:23 +1100454send_names(u_int32_t id, int count, const Stat *stats)
Damien Miller7b28dc52000-09-05 13:34:53 +1100455{
456 Buffer msg;
457 int i;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000458
Damien Miller7b28dc52000-09-05 13:34:53 +1100459 buffer_init(&msg);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000460 buffer_put_char(&msg, SSH2_FXP_NAME);
Damien Miller7b28dc52000-09-05 13:34:53 +1100461 buffer_put_int(&msg, id);
462 buffer_put_int(&msg, count);
Damien Millerfef95ad2006-07-10 20:46:55 +1000463 debug("request %u: sent names count %d", id, count);
Damien Miller7b28dc52000-09-05 13:34:53 +1100464 for (i = 0; i < count; i++) {
465 buffer_put_cstring(&msg, stats[i].name);
466 buffer_put_cstring(&msg, stats[i].long_name);
467 encode_attrib(&msg, &stats[i].attrib);
468 }
469 send_msg(&msg);
470 buffer_free(&msg);
471}
472
Ben Lindstrombba81212001-06-25 05:01:22 +0000473static void
Damien Millerf58b58c2003-11-17 21:18:23 +1100474send_attrib(u_int32_t id, const Attrib *a)
Damien Miller7b28dc52000-09-05 13:34:53 +1100475{
476 Buffer msg;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000477
Damien Millerfef95ad2006-07-10 20:46:55 +1000478 debug("request %u: sent attrib have 0x%x", id, a->flags);
Damien Miller7b28dc52000-09-05 13:34:53 +1100479 buffer_init(&msg);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000480 buffer_put_char(&msg, SSH2_FXP_ATTRS);
Damien Miller7b28dc52000-09-05 13:34:53 +1100481 buffer_put_int(&msg, id);
482 encode_attrib(&msg, a);
483 send_msg(&msg);
484 buffer_free(&msg);
485}
486
Damien Millerd671e5a2008-05-19 14:53:33 +1000487static void
488send_statvfs(u_int32_t id, struct statvfs *st)
489{
490 Buffer msg;
491 u_int64_t flag;
492
493 flag = (st->f_flag & ST_RDONLY) ? SSH2_FXE_STATVFS_ST_RDONLY : 0;
494 flag |= (st->f_flag & ST_NOSUID) ? SSH2_FXE_STATVFS_ST_NOSUID : 0;
495
496 buffer_init(&msg);
497 buffer_put_char(&msg, SSH2_FXP_EXTENDED_REPLY);
498 buffer_put_int(&msg, id);
Darren Tucker3463aca2008-06-09 23:06:55 +1000499 buffer_put_int64(&msg, st->f_bsize);
500 buffer_put_int64(&msg, st->f_frsize);
Damien Millerd671e5a2008-05-19 14:53:33 +1000501 buffer_put_int64(&msg, st->f_blocks);
502 buffer_put_int64(&msg, st->f_bfree);
503 buffer_put_int64(&msg, st->f_bavail);
504 buffer_put_int64(&msg, st->f_files);
505 buffer_put_int64(&msg, st->f_ffree);
506 buffer_put_int64(&msg, st->f_favail);
Darren Tucker77001382008-06-09 06:17:53 +1000507 buffer_put_int64(&msg, FSID_TO_ULONG(st->f_fsid));
Darren Tucker3463aca2008-06-09 23:06:55 +1000508 buffer_put_int64(&msg, flag);
509 buffer_put_int64(&msg, st->f_namemax);
Damien Millerd671e5a2008-05-19 14:53:33 +1000510 send_msg(&msg);
511 buffer_free(&msg);
512}
513
Damien Miller7b28dc52000-09-05 13:34:53 +1100514/* parse incoming */
515
Ben Lindstrombba81212001-06-25 05:01:22 +0000516static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100517process_init(void)
518{
519 Buffer msg;
Damien Miller7b28dc52000-09-05 13:34:53 +1100520
Ben Lindstrom937df1d2002-06-06 21:58:35 +0000521 version = get_int();
Damien Millerfef95ad2006-07-10 20:46:55 +1000522 verbose("received client version %d", version);
Damien Miller7b28dc52000-09-05 13:34:53 +1100523 buffer_init(&msg);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000524 buffer_put_char(&msg, SSH2_FXP_VERSION);
525 buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
Damien Miller7c296612008-03-07 18:33:53 +1100526 /* POSIX rename extension */
527 buffer_put_cstring(&msg, "posix-rename@openssh.com");
528 buffer_put_cstring(&msg, "1"); /* version */
Damien Millera7e0d5a2008-05-19 16:08:41 +1000529 /* statvfs extension */
Damien Millerd671e5a2008-05-19 14:53:33 +1000530 buffer_put_cstring(&msg, "statvfs@openssh.com");
Darren Tucker294b8412008-06-08 12:57:08 +1000531 buffer_put_cstring(&msg, "2"); /* version */
Damien Millera7e0d5a2008-05-19 16:08:41 +1000532 /* fstatvfs extension */
Damien Millerd671e5a2008-05-19 14:53:33 +1000533 buffer_put_cstring(&msg, "fstatvfs@openssh.com");
Darren Tucker294b8412008-06-08 12:57:08 +1000534 buffer_put_cstring(&msg, "2"); /* version */
Damien Miller7b28dc52000-09-05 13:34:53 +1100535 send_msg(&msg);
536 buffer_free(&msg);
537}
538
Ben Lindstrombba81212001-06-25 05:01:22 +0000539static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100540process_open(void)
541{
542 u_int32_t id, pflags;
543 Attrib *a;
544 char *name;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000545 int handle, fd, flags, mode, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100546
547 id = get_int();
548 name = get_string(NULL);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000549 pflags = get_int(); /* portable flags */
Damien Miller6444fe92006-07-10 21:31:27 +1000550 debug3("request %u: open flags %d", id, pflags);
Damien Miller7b28dc52000-09-05 13:34:53 +1100551 a = get_attrib();
552 flags = flags_from_portable(pflags);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000553 mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666;
Damien Millerfef95ad2006-07-10 20:46:55 +1000554 logit("open \"%s\" flags %s mode 0%o",
555 name, string_from_portable(pflags), mode);
Damien Miller7b28dc52000-09-05 13:34:53 +1100556 fd = open(name, flags, mode);
557 if (fd < 0) {
558 status = errno_to_portable(errno);
559 } else {
Damien Miller00111382003-03-10 11:21:17 +1100560 handle = handle_new(HANDLE_FILE, name, fd, NULL);
Damien Miller7b28dc52000-09-05 13:34:53 +1100561 if (handle < 0) {
562 close(fd);
563 } else {
564 send_handle(id, handle);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000565 status = SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +1100566 }
567 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000568 if (status != SSH2_FX_OK)
Damien Miller7b28dc52000-09-05 13:34:53 +1100569 send_status(id, status);
570 xfree(name);
571}
572
Ben Lindstrombba81212001-06-25 05:01:22 +0000573static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100574process_close(void)
575{
576 u_int32_t id;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000577 int handle, ret, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100578
579 id = get_int();
580 handle = get_handle();
Damien Millerfef95ad2006-07-10 20:46:55 +1000581 debug3("request %u: close handle %u", id, handle);
582 handle_log_close(handle, NULL);
Damien Miller7b28dc52000-09-05 13:34:53 +1100583 ret = handle_close(handle);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000584 status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +1100585 send_status(id, status);
586}
587
Ben Lindstrombba81212001-06-25 05:01:22 +0000588static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100589process_read(void)
590{
591 char buf[64*1024];
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000592 u_int32_t id, len;
593 int handle, fd, ret, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100594 u_int64_t off;
595
596 id = get_int();
597 handle = get_handle();
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000598 off = get_int64();
Damien Miller7b28dc52000-09-05 13:34:53 +1100599 len = get_int();
600
Damien Millerfef95ad2006-07-10 20:46:55 +1000601 debug("request %u: read \"%s\" (handle %d) off %llu len %d",
602 id, handle_to_name(handle), handle, (unsigned long long)off, len);
Damien Miller7b28dc52000-09-05 13:34:53 +1100603 if (len > sizeof buf) {
604 len = sizeof buf;
Damien Millerfef95ad2006-07-10 20:46:55 +1000605 debug2("read change len %d", len);
Damien Miller7b28dc52000-09-05 13:34:53 +1100606 }
607 fd = handle_to_fd(handle);
608 if (fd >= 0) {
609 if (lseek(fd, off, SEEK_SET) < 0) {
610 error("process_read: seek failed");
611 status = errno_to_portable(errno);
612 } else {
613 ret = read(fd, buf, len);
614 if (ret < 0) {
615 status = errno_to_portable(errno);
616 } else if (ret == 0) {
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000617 status = SSH2_FX_EOF;
Damien Miller7b28dc52000-09-05 13:34:53 +1100618 } else {
619 send_data(id, buf, ret);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000620 status = SSH2_FX_OK;
Damien Millerfef95ad2006-07-10 20:46:55 +1000621 handle_update_read(handle, ret);
Damien Miller7b28dc52000-09-05 13:34:53 +1100622 }
623 }
624 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000625 if (status != SSH2_FX_OK)
Damien Miller7b28dc52000-09-05 13:34:53 +1100626 send_status(id, status);
627}
628
Ben Lindstrombba81212001-06-25 05:01:22 +0000629static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100630process_write(void)
631{
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000632 u_int32_t id;
Damien Miller7b28dc52000-09-05 13:34:53 +1100633 u_int64_t off;
Damien Millere4340be2000-09-16 13:29:08 +1100634 u_int len;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000635 int handle, fd, ret, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100636 char *data;
637
638 id = get_int();
639 handle = get_handle();
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000640 off = get_int64();
Damien Miller7b28dc52000-09-05 13:34:53 +1100641 data = get_string(&len);
642
Damien Millerfef95ad2006-07-10 20:46:55 +1000643 debug("request %u: write \"%s\" (handle %d) off %llu len %d",
644 id, handle_to_name(handle), handle, (unsigned long long)off, len);
Damien Miller7b28dc52000-09-05 13:34:53 +1100645 fd = handle_to_fd(handle);
646 if (fd >= 0) {
647 if (lseek(fd, off, SEEK_SET) < 0) {
648 status = errno_to_portable(errno);
649 error("process_write: seek failed");
650 } else {
651/* XXX ATOMICIO ? */
652 ret = write(fd, data, len);
Damien Millereccb9de2005-06-17 12:59:34 +1000653 if (ret < 0) {
Damien Miller7b28dc52000-09-05 13:34:53 +1100654 error("process_write: write failed");
655 status = errno_to_portable(errno);
Damien Millereccb9de2005-06-17 12:59:34 +1000656 } else if ((size_t)ret == len) {
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000657 status = SSH2_FX_OK;
Damien Millerfef95ad2006-07-10 20:46:55 +1000658 handle_update_write(handle, ret);
Damien Miller7b28dc52000-09-05 13:34:53 +1100659 } else {
Damien Millerfef95ad2006-07-10 20:46:55 +1000660 debug2("nothing at all written");
Damien Miller7b28dc52000-09-05 13:34:53 +1100661 }
662 }
663 }
664 send_status(id, status);
665 xfree(data);
666}
667
Ben Lindstrombba81212001-06-25 05:01:22 +0000668static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100669process_do_stat(int do_lstat)
670{
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000671 Attrib a;
Damien Miller7b28dc52000-09-05 13:34:53 +1100672 struct stat st;
673 u_int32_t id;
674 char *name;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000675 int ret, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100676
677 id = get_int();
678 name = get_string(NULL);
Damien Millerfef95ad2006-07-10 20:46:55 +1000679 debug3("request %u: %sstat", id, do_lstat ? "l" : "");
680 verbose("%sstat name \"%s\"", do_lstat ? "l" : "", name);
Damien Miller7b28dc52000-09-05 13:34:53 +1100681 ret = do_lstat ? lstat(name, &st) : stat(name, &st);
682 if (ret < 0) {
683 status = errno_to_portable(errno);
684 } else {
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000685 stat_to_attrib(&st, &a);
686 send_attrib(id, &a);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000687 status = SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +1100688 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000689 if (status != SSH2_FX_OK)
Damien Miller7b28dc52000-09-05 13:34:53 +1100690 send_status(id, status);
691 xfree(name);
692}
693
Ben Lindstrombba81212001-06-25 05:01:22 +0000694static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100695process_stat(void)
696{
697 process_do_stat(0);
698}
699
Ben Lindstrombba81212001-06-25 05:01:22 +0000700static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100701process_lstat(void)
702{
703 process_do_stat(1);
704}
705
Ben Lindstrombba81212001-06-25 05:01:22 +0000706static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100707process_fstat(void)
708{
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000709 Attrib a;
Damien Miller7b28dc52000-09-05 13:34:53 +1100710 struct stat st;
711 u_int32_t id;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000712 int fd, ret, handle, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100713
714 id = get_int();
715 handle = get_handle();
Damien Millerfef95ad2006-07-10 20:46:55 +1000716 debug("request %u: fstat \"%s\" (handle %u)",
717 id, handle_to_name(handle), handle);
Damien Miller7b28dc52000-09-05 13:34:53 +1100718 fd = handle_to_fd(handle);
Damien Millere2334d62007-01-05 16:31:02 +1100719 if (fd >= 0) {
Damien Miller7b28dc52000-09-05 13:34:53 +1100720 ret = fstat(fd, &st);
721 if (ret < 0) {
722 status = errno_to_portable(errno);
723 } else {
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000724 stat_to_attrib(&st, &a);
725 send_attrib(id, &a);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000726 status = SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +1100727 }
728 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000729 if (status != SSH2_FX_OK)
Damien Miller7b28dc52000-09-05 13:34:53 +1100730 send_status(id, status);
731}
732
Ben Lindstrombba81212001-06-25 05:01:22 +0000733static struct timeval *
Damien Millerf58b58c2003-11-17 21:18:23 +1100734attrib_to_tv(const Attrib *a)
Damien Miller7b28dc52000-09-05 13:34:53 +1100735{
736 static struct timeval tv[2];
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000737
Damien Miller7b28dc52000-09-05 13:34:53 +1100738 tv[0].tv_sec = a->atime;
739 tv[0].tv_usec = 0;
740 tv[1].tv_sec = a->mtime;
741 tv[1].tv_usec = 0;
742 return tv;
743}
744
Ben Lindstrombba81212001-06-25 05:01:22 +0000745static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100746process_setstat(void)
747{
748 Attrib *a;
749 u_int32_t id;
750 char *name;
Ben Lindstromb1f483f2002-06-23 21:27:18 +0000751 int status = SSH2_FX_OK, ret;
Damien Miller7b28dc52000-09-05 13:34:53 +1100752
753 id = get_int();
754 name = get_string(NULL);
755 a = get_attrib();
Damien Millerfef95ad2006-07-10 20:46:55 +1000756 debug("request %u: setstat name \"%s\"", id, name);
Damien Miller00c92172002-02-13 14:05:00 +1100757 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
Darren Tucker86473c52007-05-20 14:59:32 +1000758 logit("set \"%s\" size %llu",
759 name, (unsigned long long)a->size);
Damien Miller00c92172002-02-13 14:05:00 +1100760 ret = truncate(name, a->size);
761 if (ret == -1)
762 status = errno_to_portable(errno);
763 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000764 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
Damien Millerfef95ad2006-07-10 20:46:55 +1000765 logit("set \"%s\" mode %04o", name, a->perm);
Damien Miller9e720282008-06-29 22:46:35 +1000766 ret = chmod(name, a->perm & 07777);
Damien Miller7b28dc52000-09-05 13:34:53 +1100767 if (ret == -1)
768 status = errno_to_portable(errno);
769 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000770 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
Damien Millerfef95ad2006-07-10 20:46:55 +1000771 char buf[64];
772 time_t t = a->mtime;
773
774 strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S",
775 localtime(&t));
776 logit("set \"%s\" modtime %s", name, buf);
Damien Miller7b28dc52000-09-05 13:34:53 +1100777 ret = utimes(name, attrib_to_tv(a));
778 if (ret == -1)
779 status = errno_to_portable(errno);
780 }
Kevin Steves8e743932001-02-05 13:24:35 +0000781 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
Damien Millerfef95ad2006-07-10 20:46:55 +1000782 logit("set \"%s\" owner %lu group %lu", name,
783 (u_long)a->uid, (u_long)a->gid);
Kevin Steves8e743932001-02-05 13:24:35 +0000784 ret = chown(name, a->uid, a->gid);
785 if (ret == -1)
786 status = errno_to_portable(errno);
787 }
Damien Miller7b28dc52000-09-05 13:34:53 +1100788 send_status(id, status);
789 xfree(name);
790}
791
Ben Lindstrombba81212001-06-25 05:01:22 +0000792static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100793process_fsetstat(void)
794{
795 Attrib *a;
796 u_int32_t id;
797 int handle, fd, ret;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000798 int status = SSH2_FX_OK;
Kevin Stevesf7ffab32001-01-24 20:11:06 +0000799
Damien Miller7b28dc52000-09-05 13:34:53 +1100800 id = get_int();
801 handle = get_handle();
802 a = get_attrib();
Damien Millerfef95ad2006-07-10 20:46:55 +1000803 debug("request %u: fsetstat handle %d", id, handle);
Damien Miller7b28dc52000-09-05 13:34:53 +1100804 fd = handle_to_fd(handle);
Damien Millerfef95ad2006-07-10 20:46:55 +1000805 if (fd < 0) {
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000806 status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100807 } else {
Damien Millerfef95ad2006-07-10 20:46:55 +1000808 char *name = handle_to_name(handle);
809
Damien Miller00c92172002-02-13 14:05:00 +1100810 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
Darren Tucker86473c52007-05-20 14:59:32 +1000811 logit("set \"%s\" size %llu",
812 name, (unsigned long long)a->size);
Damien Miller00c92172002-02-13 14:05:00 +1100813 ret = ftruncate(fd, a->size);
814 if (ret == -1)
815 status = errno_to_portable(errno);
816 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000817 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
Damien Millerfef95ad2006-07-10 20:46:55 +1000818 logit("set \"%s\" mode %04o", name, a->perm);
Ben Lindstrom200e3c92001-01-15 01:56:46 +0000819#ifdef HAVE_FCHMOD
Damien Miller9e720282008-06-29 22:46:35 +1000820 ret = fchmod(fd, a->perm & 07777);
Ben Lindstrom200e3c92001-01-15 01:56:46 +0000821#else
Damien Miller9e720282008-06-29 22:46:35 +1000822 ret = chmod(name, a->perm & 07777);
Ben Lindstrom200e3c92001-01-15 01:56:46 +0000823#endif
Damien Miller7b28dc52000-09-05 13:34:53 +1100824 if (ret == -1)
825 status = errno_to_portable(errno);
826 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000827 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
Damien Millerfef95ad2006-07-10 20:46:55 +1000828 char buf[64];
829 time_t t = a->mtime;
830
831 strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S",
832 localtime(&t));
833 logit("set \"%s\" modtime %s", name, buf);
Damien Miller7b28dc52000-09-05 13:34:53 +1100834#ifdef HAVE_FUTIMES
835 ret = futimes(fd, attrib_to_tv(a));
836#else
837 ret = utimes(name, attrib_to_tv(a));
838#endif
839 if (ret == -1)
840 status = errno_to_portable(errno);
841 }
Kevin Steves8e743932001-02-05 13:24:35 +0000842 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
Damien Millerfef95ad2006-07-10 20:46:55 +1000843 logit("set \"%s\" owner %lu group %lu", name,
844 (u_long)a->uid, (u_long)a->gid);
Ben Lindstrom34bb0c72001-02-13 02:40:56 +0000845#ifdef HAVE_FCHOWN
Kevin Steves8e743932001-02-05 13:24:35 +0000846 ret = fchown(fd, a->uid, a->gid);
Ben Lindstrom34bb0c72001-02-13 02:40:56 +0000847#else
848 ret = chown(name, a->uid, a->gid);
849#endif
Kevin Steves8e743932001-02-05 13:24:35 +0000850 if (ret == -1)
851 status = errno_to_portable(errno);
852 }
Damien Miller7b28dc52000-09-05 13:34:53 +1100853 }
854 send_status(id, status);
855}
856
Ben Lindstrombba81212001-06-25 05:01:22 +0000857static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100858process_opendir(void)
859{
860 DIR *dirp = NULL;
861 char *path;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000862 int handle, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100863 u_int32_t id;
864
865 id = get_int();
866 path = get_string(NULL);
Damien Millerfef95ad2006-07-10 20:46:55 +1000867 debug3("request %u: opendir", id);
868 logit("opendir \"%s\"", path);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000869 dirp = opendir(path);
Damien Miller7b28dc52000-09-05 13:34:53 +1100870 if (dirp == NULL) {
871 status = errno_to_portable(errno);
872 } else {
Damien Miller00111382003-03-10 11:21:17 +1100873 handle = handle_new(HANDLE_DIR, path, 0, dirp);
Damien Miller7b28dc52000-09-05 13:34:53 +1100874 if (handle < 0) {
875 closedir(dirp);
876 } else {
877 send_handle(id, handle);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000878 status = SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +1100879 }
Kevin Stevesef4eea92001-02-05 12:42:17 +0000880
Damien Miller7b28dc52000-09-05 13:34:53 +1100881 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000882 if (status != SSH2_FX_OK)
Damien Miller7b28dc52000-09-05 13:34:53 +1100883 send_status(id, status);
884 xfree(path);
885}
886
Ben Lindstrombba81212001-06-25 05:01:22 +0000887static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100888process_readdir(void)
889{
890 DIR *dirp;
891 struct dirent *dp;
892 char *path;
893 int handle;
894 u_int32_t id;
895
896 id = get_int();
897 handle = get_handle();
Damien Millerfef95ad2006-07-10 20:46:55 +1000898 debug("request %u: readdir \"%s\" (handle %d)", id,
899 handle_to_name(handle), handle);
Damien Miller7b28dc52000-09-05 13:34:53 +1100900 dirp = handle_to_dir(handle);
901 path = handle_to_name(handle);
902 if (dirp == NULL || path == NULL) {
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000903 send_status(id, SSH2_FX_FAILURE);
Damien Miller7b28dc52000-09-05 13:34:53 +1100904 } else {
Damien Miller7b28dc52000-09-05 13:34:53 +1100905 struct stat st;
Damien Millerfef95ad2006-07-10 20:46:55 +1000906 char pathname[MAXPATHLEN];
Damien Miller7b28dc52000-09-05 13:34:53 +1100907 Stat *stats;
908 int nstats = 10, count = 0, i;
Ben Lindstromb1f483f2002-06-23 21:27:18 +0000909
Damien Miller07d86be2006-03-26 14:19:21 +1100910 stats = xcalloc(nstats, sizeof(Stat));
Damien Miller7b28dc52000-09-05 13:34:53 +1100911 while ((dp = readdir(dirp)) != NULL) {
912 if (count >= nstats) {
913 nstats *= 2;
Damien Miller36812092006-03-26 14:22:47 +1100914 stats = xrealloc(stats, nstats, sizeof(Stat));
Damien Miller7b28dc52000-09-05 13:34:53 +1100915 }
916/* XXX OVERFLOW ? */
Ben Lindstrom95148e32001-08-06 21:30:53 +0000917 snprintf(pathname, sizeof pathname, "%s%s%s", path,
918 strcmp(path, "/") ? "/" : "", dp->d_name);
Damien Miller7b28dc52000-09-05 13:34:53 +1100919 if (lstat(pathname, &st) < 0)
920 continue;
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000921 stat_to_attrib(&st, &(stats[count].attrib));
Damien Miller7b28dc52000-09-05 13:34:53 +1100922 stats[count].name = xstrdup(dp->d_name);
Damien Millere1a49812002-09-12 09:54:25 +1000923 stats[count].long_name = ls_file(dp->d_name, &st, 0);
Damien Miller7b28dc52000-09-05 13:34:53 +1100924 count++;
925 /* send up to 100 entries in one message */
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000926 /* XXX check packet size instead */
Damien Miller7b28dc52000-09-05 13:34:53 +1100927 if (count == 100)
928 break;
929 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000930 if (count > 0) {
931 send_names(id, count, stats);
Damien Miller9f0f5c62001-12-21 14:45:46 +1100932 for (i = 0; i < count; i++) {
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000933 xfree(stats[i].name);
934 xfree(stats[i].long_name);
935 }
936 } else {
937 send_status(id, SSH2_FX_EOF);
Damien Miller7b28dc52000-09-05 13:34:53 +1100938 }
939 xfree(stats);
940 }
941}
942
Ben Lindstrombba81212001-06-25 05:01:22 +0000943static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100944process_remove(void)
945{
946 char *name;
947 u_int32_t id;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000948 int status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100949 int ret;
950
951 id = get_int();
952 name = get_string(NULL);
Damien Millerfef95ad2006-07-10 20:46:55 +1000953 debug3("request %u: remove", id);
954 logit("remove name \"%s\"", name);
Kevin Stevesa074feb2000-12-21 22:33:45 +0000955 ret = unlink(name);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000956 status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +1100957 send_status(id, status);
958 xfree(name);
959}
960
Ben Lindstrombba81212001-06-25 05:01:22 +0000961static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100962process_mkdir(void)
963{
964 Attrib *a;
965 u_int32_t id;
966 char *name;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000967 int ret, mode, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100968
969 id = get_int();
970 name = get_string(NULL);
971 a = get_attrib();
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000972 mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ?
Damien Miller9e720282008-06-29 22:46:35 +1000973 a->perm & 07777 : 0777;
Damien Millerfef95ad2006-07-10 20:46:55 +1000974 debug3("request %u: mkdir", id);
975 logit("mkdir name \"%s\" mode 0%o", name, mode);
Damien Miller7b28dc52000-09-05 13:34:53 +1100976 ret = mkdir(name, mode);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000977 status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +1100978 send_status(id, status);
979 xfree(name);
980}
981
Ben Lindstrombba81212001-06-25 05:01:22 +0000982static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100983process_rmdir(void)
984{
985 u_int32_t id;
986 char *name;
987 int ret, status;
988
989 id = get_int();
990 name = get_string(NULL);
Damien Millerfef95ad2006-07-10 20:46:55 +1000991 debug3("request %u: rmdir", id);
992 logit("rmdir name \"%s\"", name);
Damien Miller7b28dc52000-09-05 13:34:53 +1100993 ret = rmdir(name);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000994 status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +1100995 send_status(id, status);
996 xfree(name);
997}
998
Ben Lindstrombba81212001-06-25 05:01:22 +0000999static void
Damien Miller7b28dc52000-09-05 13:34:53 +11001000process_realpath(void)
1001{
1002 char resolvedname[MAXPATHLEN];
1003 u_int32_t id;
1004 char *path;
1005
1006 id = get_int();
1007 path = get_string(NULL);
Ben Lindstromfa1b3d02000-12-10 01:55:37 +00001008 if (path[0] == '\0') {
1009 xfree(path);
1010 path = xstrdup(".");
1011 }
Damien Millerfef95ad2006-07-10 20:46:55 +10001012 debug3("request %u: realpath", id);
1013 verbose("realpath \"%s\"", path);
Damien Miller7b28dc52000-09-05 13:34:53 +11001014 if (realpath(path, resolvedname) == NULL) {
1015 send_status(id, errno_to_portable(errno));
1016 } else {
1017 Stat s;
1018 attrib_clear(&s.attrib);
1019 s.name = s.long_name = resolvedname;
1020 send_names(id, 1, &s);
1021 }
1022 xfree(path);
1023}
1024
Ben Lindstrombba81212001-06-25 05:01:22 +00001025static void
Damien Miller7b28dc52000-09-05 13:34:53 +11001026process_rename(void)
1027{
1028 u_int32_t id;
1029 char *oldpath, *newpath;
Damien Miller9e51a732003-02-24 11:58:44 +11001030 int status;
Damien Millerb3207e82003-03-26 16:01:11 +11001031 struct stat sb;
Damien Miller7b28dc52000-09-05 13:34:53 +11001032
1033 id = get_int();
1034 oldpath = get_string(NULL);
1035 newpath = get_string(NULL);
Damien Millerfef95ad2006-07-10 20:46:55 +10001036 debug3("request %u: rename", id);
1037 logit("rename old \"%s\" new \"%s\"", oldpath, newpath);
Damien Millerb3207e82003-03-26 16:01:11 +11001038 status = SSH2_FX_FAILURE;
1039 if (lstat(oldpath, &sb) == -1)
Damien Miller9e51a732003-02-24 11:58:44 +11001040 status = errno_to_portable(errno);
Damien Millerb3207e82003-03-26 16:01:11 +11001041 else if (S_ISREG(sb.st_mode)) {
1042 /* Race-free rename of regular files */
Darren Tuckeraedc1d62004-06-25 17:06:02 +10001043 if (link(oldpath, newpath) == -1) {
Darren Tuckere59b5082004-06-28 16:01:19 +10001044 if (errno == EOPNOTSUPP
1045#ifdef LINK_OPNOTSUPP_ERRNO
1046 || errno == LINK_OPNOTSUPP_ERRNO
1047#endif
1048 ) {
Darren Tuckeraedc1d62004-06-25 17:06:02 +10001049 struct stat st;
1050
1051 /*
1052 * fs doesn't support links, so fall back to
1053 * stat+rename. This is racy.
1054 */
1055 if (stat(newpath, &st) == -1) {
1056 if (rename(oldpath, newpath) == -1)
1057 status =
1058 errno_to_portable(errno);
1059 else
1060 status = SSH2_FX_OK;
1061 }
1062 } else {
1063 status = errno_to_portable(errno);
1064 }
1065 } else if (unlink(oldpath) == -1) {
Damien Millerb3207e82003-03-26 16:01:11 +11001066 status = errno_to_portable(errno);
1067 /* clean spare link */
1068 unlink(newpath);
1069 } else
1070 status = SSH2_FX_OK;
1071 } else if (stat(newpath, &sb) == -1) {
1072 if (rename(oldpath, newpath) == -1)
1073 status = errno_to_portable(errno);
1074 else
1075 status = SSH2_FX_OK;
1076 }
Damien Miller7b28dc52000-09-05 13:34:53 +11001077 send_status(id, status);
1078 xfree(oldpath);
1079 xfree(newpath);
1080}
1081
Ben Lindstrombba81212001-06-25 05:01:22 +00001082static void
Damien Miller058316f2001-03-08 10:08:49 +11001083process_readlink(void)
1084{
1085 u_int32_t id;
Ben Lindstromabbb73d2001-05-17 03:14:57 +00001086 int len;
Darren Tucker3f9fdc72004-06-22 12:56:01 +10001087 char buf[MAXPATHLEN];
Damien Miller058316f2001-03-08 10:08:49 +11001088 char *path;
1089
1090 id = get_int();
1091 path = get_string(NULL);
Damien Millerfef95ad2006-07-10 20:46:55 +10001092 debug3("request %u: readlink", id);
1093 verbose("readlink \"%s\"", path);
Darren Tucker3f9fdc72004-06-22 12:56:01 +10001094 if ((len = readlink(path, buf, sizeof(buf) - 1)) == -1)
Damien Miller058316f2001-03-08 10:08:49 +11001095 send_status(id, errno_to_portable(errno));
1096 else {
1097 Stat s;
Damien Miller9f0f5c62001-12-21 14:45:46 +11001098
Darren Tucker3f9fdc72004-06-22 12:56:01 +10001099 buf[len] = '\0';
Damien Miller058316f2001-03-08 10:08:49 +11001100 attrib_clear(&s.attrib);
Darren Tucker3f9fdc72004-06-22 12:56:01 +10001101 s.name = s.long_name = buf;
Damien Miller058316f2001-03-08 10:08:49 +11001102 send_names(id, 1, &s);
1103 }
1104 xfree(path);
1105}
1106
Ben Lindstrombba81212001-06-25 05:01:22 +00001107static void
Damien Miller058316f2001-03-08 10:08:49 +11001108process_symlink(void)
1109{
1110 u_int32_t id;
Damien Miller058316f2001-03-08 10:08:49 +11001111 char *oldpath, *newpath;
Damien Miller9e51a732003-02-24 11:58:44 +11001112 int ret, status;
Damien Miller058316f2001-03-08 10:08:49 +11001113
1114 id = get_int();
1115 oldpath = get_string(NULL);
1116 newpath = get_string(NULL);
Damien Millerfef95ad2006-07-10 20:46:55 +10001117 debug3("request %u: symlink", id);
1118 logit("symlink old \"%s\" new \"%s\"", oldpath, newpath);
Damien Miller9e51a732003-02-24 11:58:44 +11001119 /* this will fail if 'newpath' exists */
1120 ret = symlink(oldpath, newpath);
1121 status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
Damien Miller058316f2001-03-08 10:08:49 +11001122 send_status(id, status);
1123 xfree(oldpath);
1124 xfree(newpath);
1125}
1126
Ben Lindstrombba81212001-06-25 05:01:22 +00001127static void
Damien Miller7c296612008-03-07 18:33:53 +11001128process_extended_posix_rename(u_int32_t id)
1129{
1130 char *oldpath, *newpath;
1131
1132 oldpath = get_string(NULL);
1133 newpath = get_string(NULL);
1134 debug3("request %u: posix-rename", id);
1135 logit("posix-rename old \"%s\" new \"%s\"", oldpath, newpath);
1136 if (rename(oldpath, newpath) == -1)
1137 send_status(id, errno_to_portable(errno));
1138 else
1139 send_status(id, SSH2_FX_OK);
1140 xfree(oldpath);
1141 xfree(newpath);
1142}
1143
1144static void
Damien Millerd671e5a2008-05-19 14:53:33 +10001145process_extended_statvfs(u_int32_t id)
1146{
1147 char *path;
1148 struct statvfs st;
1149
1150 path = get_string(NULL);
1151 debug3("request %u: statfs", id);
1152 logit("statfs \"%s\"", path);
1153
1154 if (statvfs(path, &st) != 0)
1155 send_status(id, errno_to_portable(errno));
1156 else
1157 send_statvfs(id, &st);
1158 xfree(path);
1159}
1160
1161static void
1162process_extended_fstatvfs(u_int32_t id)
1163{
1164 int handle, fd;
1165 struct statvfs st;
1166
1167 handle = get_handle();
1168 debug("request %u: fstatvfs \"%s\" (handle %u)",
1169 id, handle_to_name(handle), handle);
1170 if ((fd = handle_to_fd(handle)) < 0) {
1171 send_status(id, SSH2_FX_FAILURE);
1172 return;
1173 }
1174 if (fstatvfs(fd, &st) != 0)
1175 send_status(id, errno_to_portable(errno));
1176 else
1177 send_statvfs(id, &st);
1178}
1179
1180static void
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001181process_extended(void)
1182{
1183 u_int32_t id;
1184 char *request;
1185
1186 id = get_int();
1187 request = get_string(NULL);
Damien Miller7c296612008-03-07 18:33:53 +11001188 if (strcmp(request, "posix-rename@openssh.com") == 0)
1189 process_extended_posix_rename(id);
Damien Millerd671e5a2008-05-19 14:53:33 +10001190 else if (strcmp(request, "statvfs@openssh.com") == 0)
1191 process_extended_statvfs(id);
1192 else if (strcmp(request, "fstatvfs@openssh.com") == 0)
1193 process_extended_fstatvfs(id);
Damien Miller7c296612008-03-07 18:33:53 +11001194 else
1195 send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001196 xfree(request);
1197}
Damien Miller7b28dc52000-09-05 13:34:53 +11001198
1199/* stolen from ssh-agent */
1200
Ben Lindstrombba81212001-06-25 05:01:22 +00001201static void
Damien Miller7b28dc52000-09-05 13:34:53 +11001202process(void)
1203{
Ben Lindstrom46c16222000-12-22 01:43:59 +00001204 u_int msg_len;
Ben Lindstrom2c140472002-06-06 21:57:54 +00001205 u_int buf_len;
1206 u_int consumed;
Ben Lindstrom46c16222000-12-22 01:43:59 +00001207 u_int type;
1208 u_char *cp;
Damien Miller7b28dc52000-09-05 13:34:53 +11001209
Ben Lindstrom2c140472002-06-06 21:57:54 +00001210 buf_len = buffer_len(&iqueue);
1211 if (buf_len < 5)
Damien Miller7b28dc52000-09-05 13:34:53 +11001212 return; /* Incomplete message. */
Damien Miller708d21c2002-01-22 23:18:15 +11001213 cp = buffer_ptr(&iqueue);
Damien Miller3f941882006-03-31 23:13:02 +11001214 msg_len = get_u32(cp);
Damien Miller54446182006-01-02 23:40:50 +11001215 if (msg_len > SFTP_MAX_MSG_LENGTH) {
Damien Millerfef95ad2006-07-10 20:46:55 +10001216 error("bad message from %s local user %s",
1217 client_addr, pw->pw_name);
Damien Millerdfc24252008-02-10 22:29:40 +11001218 sftp_server_cleanup_exit(11);
Damien Miller7b28dc52000-09-05 13:34:53 +11001219 }
Ben Lindstrom2c140472002-06-06 21:57:54 +00001220 if (buf_len < msg_len + 4)
Damien Miller7b28dc52000-09-05 13:34:53 +11001221 return;
1222 buffer_consume(&iqueue, 4);
Ben Lindstrom2c140472002-06-06 21:57:54 +00001223 buf_len -= 4;
Damien Miller7b28dc52000-09-05 13:34:53 +11001224 type = buffer_get_char(&iqueue);
1225 switch (type) {
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001226 case SSH2_FXP_INIT:
Damien Miller7b28dc52000-09-05 13:34:53 +11001227 process_init();
1228 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001229 case SSH2_FXP_OPEN:
Damien Miller7b28dc52000-09-05 13:34:53 +11001230 process_open();
1231 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001232 case SSH2_FXP_CLOSE:
Damien Miller7b28dc52000-09-05 13:34:53 +11001233 process_close();
1234 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001235 case SSH2_FXP_READ:
Damien Miller7b28dc52000-09-05 13:34:53 +11001236 process_read();
1237 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001238 case SSH2_FXP_WRITE:
Damien Miller7b28dc52000-09-05 13:34:53 +11001239 process_write();
1240 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001241 case SSH2_FXP_LSTAT:
Damien Miller7b28dc52000-09-05 13:34:53 +11001242 process_lstat();
1243 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001244 case SSH2_FXP_FSTAT:
Damien Miller7b28dc52000-09-05 13:34:53 +11001245 process_fstat();
1246 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001247 case SSH2_FXP_SETSTAT:
Damien Miller7b28dc52000-09-05 13:34:53 +11001248 process_setstat();
1249 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001250 case SSH2_FXP_FSETSTAT:
Damien Miller7b28dc52000-09-05 13:34:53 +11001251 process_fsetstat();
1252 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001253 case SSH2_FXP_OPENDIR:
Damien Miller7b28dc52000-09-05 13:34:53 +11001254 process_opendir();
1255 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001256 case SSH2_FXP_READDIR:
Damien Miller7b28dc52000-09-05 13:34:53 +11001257 process_readdir();
1258 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001259 case SSH2_FXP_REMOVE:
Damien Miller7b28dc52000-09-05 13:34:53 +11001260 process_remove();
1261 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001262 case SSH2_FXP_MKDIR:
Damien Miller7b28dc52000-09-05 13:34:53 +11001263 process_mkdir();
1264 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001265 case SSH2_FXP_RMDIR:
Damien Miller7b28dc52000-09-05 13:34:53 +11001266 process_rmdir();
1267 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001268 case SSH2_FXP_REALPATH:
Damien Miller7b28dc52000-09-05 13:34:53 +11001269 process_realpath();
1270 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001271 case SSH2_FXP_STAT:
Damien Miller7b28dc52000-09-05 13:34:53 +11001272 process_stat();
1273 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001274 case SSH2_FXP_RENAME:
Damien Miller7b28dc52000-09-05 13:34:53 +11001275 process_rename();
1276 break;
Damien Miller058316f2001-03-08 10:08:49 +11001277 case SSH2_FXP_READLINK:
1278 process_readlink();
1279 break;
1280 case SSH2_FXP_SYMLINK:
1281 process_symlink();
1282 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001283 case SSH2_FXP_EXTENDED:
1284 process_extended();
1285 break;
Damien Miller7b28dc52000-09-05 13:34:53 +11001286 default:
1287 error("Unknown message %d", type);
1288 break;
1289 }
Ben Lindstrom2c140472002-06-06 21:57:54 +00001290 /* discard the remaining bytes from the current packet */
Damien Millerdfc24252008-02-10 22:29:40 +11001291 if (buf_len < buffer_len(&iqueue)) {
1292 error("iqueue grew unexpectedly");
1293 sftp_server_cleanup_exit(255);
1294 }
Ben Lindstrom2c140472002-06-06 21:57:54 +00001295 consumed = buf_len - buffer_len(&iqueue);
Damien Millerdfc24252008-02-10 22:29:40 +11001296 if (msg_len < consumed) {
1297 error("msg_len %d < consumed %d", msg_len, consumed);
1298 sftp_server_cleanup_exit(255);
1299 }
Ben Lindstrom2c140472002-06-06 21:57:54 +00001300 if (msg_len > consumed)
1301 buffer_consume(&iqueue, msg_len - consumed);
Damien Miller7b28dc52000-09-05 13:34:53 +11001302}
1303
Damien Millerfef95ad2006-07-10 20:46:55 +10001304/* Cleanup handler that logs active handles upon normal exit */
1305void
Damien Millerdfc24252008-02-10 22:29:40 +11001306sftp_server_cleanup_exit(int i)
Damien Millerfef95ad2006-07-10 20:46:55 +10001307{
1308 if (pw != NULL && client_addr != NULL) {
1309 handle_log_exit();
1310 logit("session closed for local user %s from [%s]",
1311 pw->pw_name, client_addr);
1312 }
1313 _exit(i);
1314}
1315
1316static void
Damien Millerdfc24252008-02-10 22:29:40 +11001317sftp_server_usage(void)
Damien Millerfef95ad2006-07-10 20:46:55 +10001318{
1319 extern char *__progname;
1320
1321 fprintf(stderr,
1322 "usage: %s [-he] [-l log_level] [-f log_facility]\n", __progname);
1323 exit(1);
1324}
1325
Damien Miller7b28dc52000-09-05 13:34:53 +11001326int
Damien Millerd8cb1f12008-02-10 22:40:12 +11001327sftp_server_main(int argc, char **argv, struct passwd *user_pw)
Damien Miller7b28dc52000-09-05 13:34:53 +11001328{
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001329 fd_set *rset, *wset;
Damien Millerfef95ad2006-07-10 20:46:55 +10001330 int in, out, max, ch, skipargs = 0, log_stderr = 0;
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001331 ssize_t len, olen, set_size;
Damien Millerfef95ad2006-07-10 20:46:55 +10001332 SyslogFacility log_facility = SYSLOG_FACILITY_AUTH;
Darren Tuckere9405982007-05-20 15:09:04 +10001333 char *cp, buf[4*4096];
Damien Millerfef95ad2006-07-10 20:46:55 +10001334
Damien Millerfef95ad2006-07-10 20:46:55 +10001335 extern char *optarg;
1336 extern char *__progname;
Damien Miller7b28dc52000-09-05 13:34:53 +11001337
Damien Millerfef95ad2006-07-10 20:46:55 +10001338 __progname = ssh_get_progname(argv[0]);
1339 log_init(__progname, log_level, log_facility, log_stderr);
Ben Lindstromc7f4ccd2001-03-15 00:09:15 +00001340
Damien Millerfef95ad2006-07-10 20:46:55 +10001341 while (!skipargs && (ch = getopt(argc, argv, "C:f:l:che")) != -1) {
1342 switch (ch) {
1343 case 'c':
1344 /*
1345 * Ignore all arguments if we are invoked as a
Damien Millerd7834352006-08-05 12:39:39 +10001346 * shell using "sftp-server -c command"
Damien Millerfef95ad2006-07-10 20:46:55 +10001347 */
1348 skipargs = 1;
1349 break;
1350 case 'e':
1351 log_stderr = 1;
1352 break;
1353 case 'l':
1354 log_level = log_level_number(optarg);
1355 if (log_level == SYSLOG_LEVEL_NOT_SET)
1356 error("Invalid log level \"%s\"", optarg);
1357 break;
1358 case 'f':
1359 log_facility = log_facility_number(optarg);
Damien Miller35e18db2007-09-17 16:11:33 +10001360 if (log_facility == SYSLOG_FACILITY_NOT_SET)
Damien Millerfef95ad2006-07-10 20:46:55 +10001361 error("Invalid log facility \"%s\"", optarg);
1362 break;
1363 case 'h':
1364 default:
Damien Millerdfc24252008-02-10 22:29:40 +11001365 sftp_server_usage();
Damien Millerfef95ad2006-07-10 20:46:55 +10001366 }
1367 }
1368
1369 log_init(__progname, log_level, log_facility, log_stderr);
1370
1371 if ((cp = getenv("SSH_CONNECTION")) != NULL) {
1372 client_addr = xstrdup(cp);
Damien Millerdfc24252008-02-10 22:29:40 +11001373 if ((cp = strchr(client_addr, ' ')) == NULL) {
1374 error("Malformed SSH_CONNECTION variable: \"%s\"",
Damien Millerfef95ad2006-07-10 20:46:55 +10001375 getenv("SSH_CONNECTION"));
Damien Millerdfc24252008-02-10 22:29:40 +11001376 sftp_server_cleanup_exit(255);
1377 }
Damien Millerfef95ad2006-07-10 20:46:55 +10001378 *cp = '\0';
1379 } else
1380 client_addr = xstrdup("UNKNOWN");
1381
Damien Millerd8cb1f12008-02-10 22:40:12 +11001382 pw = pwcopy(user_pw);
Damien Millerfef95ad2006-07-10 20:46:55 +10001383
1384 logit("session opened for local user %s from [%s]",
1385 pw->pw_name, client_addr);
1386
Damien Miller7b28dc52000-09-05 13:34:53 +11001387 in = dup(STDIN_FILENO);
1388 out = dup(STDOUT_FILENO);
1389
Damien Miller402b3312001-04-14 00:28:42 +10001390#ifdef HAVE_CYGWIN
1391 setmode(in, O_BINARY);
1392 setmode(out, O_BINARY);
1393#endif
1394
Damien Miller7b28dc52000-09-05 13:34:53 +11001395 max = 0;
1396 if (in > max)
1397 max = in;
1398 if (out > max)
1399 max = out;
1400
1401 buffer_init(&iqueue);
1402 buffer_init(&oqueue);
1403
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001404 set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask);
1405 rset = (fd_set *)xmalloc(set_size);
1406 wset = (fd_set *)xmalloc(set_size);
Damien Miller7b28dc52000-09-05 13:34:53 +11001407
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001408 for (;;) {
1409 memset(rset, 0, set_size);
1410 memset(wset, 0, set_size);
1411
Darren Tuckere9405982007-05-20 15:09:04 +10001412 /*
1413 * Ensure that we can read a full buffer and handle
1414 * the worst-case length packet it can generate,
1415 * otherwise apply backpressure by stopping reads.
1416 */
1417 if (buffer_check_alloc(&iqueue, sizeof(buf)) &&
1418 buffer_check_alloc(&oqueue, SFTP_MAX_MSG_LENGTH))
1419 FD_SET(in, rset);
1420
Damien Miller7b28dc52000-09-05 13:34:53 +11001421 olen = buffer_len(&oqueue);
1422 if (olen > 0)
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001423 FD_SET(out, wset);
Damien Miller7b28dc52000-09-05 13:34:53 +11001424
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001425 if (select(max+1, rset, wset, NULL, NULL) < 0) {
Damien Miller7b28dc52000-09-05 13:34:53 +11001426 if (errno == EINTR)
1427 continue;
Damien Millerfef95ad2006-07-10 20:46:55 +10001428 error("select: %s", strerror(errno));
Damien Millerdfc24252008-02-10 22:29:40 +11001429 sftp_server_cleanup_exit(2);
Damien Miller7b28dc52000-09-05 13:34:53 +11001430 }
1431
1432 /* copy stdin to iqueue */
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001433 if (FD_ISSET(in, rset)) {
Damien Miller7b28dc52000-09-05 13:34:53 +11001434 len = read(in, buf, sizeof buf);
1435 if (len == 0) {
1436 debug("read eof");
Damien Millerdfc24252008-02-10 22:29:40 +11001437 sftp_server_cleanup_exit(0);
Damien Miller7b28dc52000-09-05 13:34:53 +11001438 } else if (len < 0) {
Damien Millerfef95ad2006-07-10 20:46:55 +10001439 error("read: %s", strerror(errno));
Damien Millerdfc24252008-02-10 22:29:40 +11001440 sftp_server_cleanup_exit(1);
Damien Miller7b28dc52000-09-05 13:34:53 +11001441 } else {
1442 buffer_append(&iqueue, buf, len);
1443 }
1444 }
1445 /* send oqueue to stdout */
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001446 if (FD_ISSET(out, wset)) {
Damien Miller7b28dc52000-09-05 13:34:53 +11001447 len = write(out, buffer_ptr(&oqueue), olen);
1448 if (len < 0) {
Damien Millerfef95ad2006-07-10 20:46:55 +10001449 error("write: %s", strerror(errno));
Damien Millerdfc24252008-02-10 22:29:40 +11001450 sftp_server_cleanup_exit(1);
Damien Miller7b28dc52000-09-05 13:34:53 +11001451 } else {
1452 buffer_consume(&oqueue, len);
1453 }
1454 }
Darren Tuckere9405982007-05-20 15:09:04 +10001455
1456 /*
1457 * Process requests from client if we can fit the results
1458 * into the output buffer, otherwise stop processing input
1459 * and let the output queue drain.
1460 */
1461 if (buffer_check_alloc(&oqueue, SFTP_MAX_MSG_LENGTH))
1462 process();
Damien Miller7b28dc52000-09-05 13:34:53 +11001463 }
1464}