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Commit | Line | Data |
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c3effa8b | 1 | /* |
cd68afe3 | 2 | Unix SMB/CIFS implementation. |
c3effa8b AT |
3 | process incoming packets - main loop |
4 | Copyright (C) Andrew Tridgell 1992-1998 | |
b91704d4 | 5 | Copyright (C) Volker Lendecke 2005-2007 |
8af7400d | 6 | |
c3effa8b AT |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
d824b98f | 9 | the Free Software Foundation; either version 3 of the License, or |
c3effa8b | 10 | (at your option) any later version. |
8af7400d | 11 | |
c3effa8b AT |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
8af7400d | 16 | |
c3effa8b | 17 | You should have received a copy of the GNU General Public License |
5e54558c | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
c3effa8b AT |
19 | */ |
20 | ||
21 | #include "includes.h" | |
12476223 | 22 | #include "../lib/tsocket/tsocket.h" |
0e771263 | 23 | #include "system/filesys.h" |
8c24ebf3 | 24 | #include "smbd/smbd.h" |
3dde0cbb | 25 | #include "smbd/globals.h" |
aff002e8 | 26 | #include "librpc/gen_ndr/netlogon.h" |
c7fe04ab | 27 | #include "../lib/async_req/async_sock.h" |
8e16d6db | 28 | #include "ctdbd_conn.h" |
b38d0542 | 29 | #include "../lib/util/select.h" |
2e8a85ec | 30 | #include "printing/queue_process.h" |
9758afd4 | 31 | #include "system/select.h" |
235f1485 | 32 | #include "passdb.h" |
af300a9f | 33 | #include "auth.h" |
b2af281e | 34 | #include "messages.h" |
165521e2 | 35 | #include "smbprofile.h" |
c233c214 | 36 | #include "rpc_server/spoolss/srv_spoolss_nt.h" |
27022587 | 37 | #include "libsmb/libsmb.h" |
27afb891 | 38 | #include "../lib/util/tevent_ntstatus.h" |
715933a3 SM |
39 | #include "../libcli/security/dom_sid.h" |
40 | #include "../libcli/security/security_token.h" | |
41 | #include "lib/id_cache.h" | |
b5e9ece1 | 42 | #include "serverid.h" |
c3effa8b | 43 | |
6d84b24d SM |
44 | /* Internal message queue for deferred opens. */ |
45 | struct pending_message_list { | |
46 | struct pending_message_list *next, *prev; | |
47 | struct timeval request_time; /* When was this first issued? */ | |
48 | struct smbd_server_connection *sconn; | |
49 | struct timed_event *te; | |
50 | struct smb_perfcount_data pcd; | |
51 | uint32_t seqnum; | |
52 | bool encrypted; | |
53 | bool processed; | |
54 | DATA_BLOB buf; | |
55 | DATA_BLOB private_data; | |
56 | }; | |
57 | ||
ae0c6cff VL |
58 | static void construct_reply_common(struct smb_request *req, const char *inbuf, |
59 | char *outbuf); | |
cb69d105 VL |
60 | static struct pending_message_list *get_deferred_open_message_smb( |
61 | struct smbd_server_connection *sconn, uint64_t mid); | |
3b2c9beb | 62 | static bool smb_splice_chain(uint8_t **poutbuf, const uint8_t *andx_buf); |
5a33e906 | 63 | |
6800fdbb | 64 | static bool smbd_lock_socket_internal(struct smbd_server_connection *sconn) |
8de85546 | 65 | { |
cad0c004 VL |
66 | bool ok; |
67 | ||
46a48edc | 68 | if (sconn->smb1.echo_handler.socket_lock_fd == -1) { |
cad0c004 VL |
69 | return true; |
70 | } | |
71 | ||
46a48edc | 72 | sconn->smb1.echo_handler.ref_count++; |
6800fdbb | 73 | |
46a48edc | 74 | if (sconn->smb1.echo_handler.ref_count > 1) { |
6800fdbb JA |
75 | return true; |
76 | } | |
77 | ||
c0288e06 | 78 | DEBUG(10,("pid[%d] wait for socket lock\n", (int)getpid())); |
cad0c004 | 79 | |
da00021a VL |
80 | do { |
81 | ok = fcntl_lock( | |
82 | sconn->smb1.echo_handler.socket_lock_fd, | |
1ac7f071 | 83 | F_SETLKW, 0, 0, F_WRLCK); |
da00021a VL |
84 | } while (!ok && (errno == EINTR)); |
85 | ||
cad0c004 | 86 | if (!ok) { |
efb22bf7 | 87 | DEBUG(1, ("fcntl_lock failed: %s\n", strerror(errno))); |
cad0c004 VL |
88 | return false; |
89 | } | |
90 | ||
7b0b1d6d | 91 | DEBUG(10,("pid[%d] got socket lock\n", (int)getpid())); |
cad0c004 | 92 | |
8de85546 SM |
93 | return true; |
94 | } | |
95 | ||
6800fdbb JA |
96 | void smbd_lock_socket(struct smbd_server_connection *sconn) |
97 | { | |
98 | if (!smbd_lock_socket_internal(sconn)) { | |
99 | exit_server_cleanly("failed to lock socket"); | |
100 | } | |
101 | } | |
102 | ||
103 | static bool smbd_unlock_socket_internal(struct smbd_server_connection *sconn) | |
8de85546 | 104 | { |
cad0c004 VL |
105 | bool ok; |
106 | ||
46a48edc | 107 | if (sconn->smb1.echo_handler.socket_lock_fd == -1) { |
cad0c004 VL |
108 | return true; |
109 | } | |
110 | ||
46a48edc | 111 | sconn->smb1.echo_handler.ref_count--; |
6800fdbb | 112 | |
46a48edc | 113 | if (sconn->smb1.echo_handler.ref_count > 0) { |
6800fdbb JA |
114 | return true; |
115 | } | |
116 | ||
da00021a VL |
117 | do { |
118 | ok = fcntl_lock( | |
119 | sconn->smb1.echo_handler.socket_lock_fd, | |
1ac7f071 | 120 | F_SETLKW, 0, 0, F_UNLCK); |
da00021a VL |
121 | } while (!ok && (errno == EINTR)); |
122 | ||
cad0c004 | 123 | if (!ok) { |
efb22bf7 | 124 | DEBUG(1, ("fcntl_lock failed: %s\n", strerror(errno))); |
cad0c004 VL |
125 | return false; |
126 | } | |
127 | ||
c0288e06 | 128 | DEBUG(10,("pid[%d] unlocked socket\n", (int)getpid())); |
cad0c004 | 129 | |
8de85546 SM |
130 | return true; |
131 | } | |
132 | ||
6800fdbb JA |
133 | void smbd_unlock_socket(struct smbd_server_connection *sconn) |
134 | { | |
135 | if (!smbd_unlock_socket_internal(sconn)) { | |
136 | exit_server_cleanly("failed to unlock socket"); | |
137 | } | |
138 | } | |
139 | ||
36441da4 JA |
140 | /* Accessor function for smb_read_error for smbd functions. */ |
141 | ||
9254bb4e JA |
142 | /**************************************************************************** |
143 | Send an smb to a fd. | |
144 | ****************************************************************************/ | |
145 | ||
1808dd0a | 146 | bool srv_send_smb(struct smbd_server_connection *sconn, char *buffer, |
c16c90a1 SM |
147 | bool do_signing, uint32_t seqnum, |
148 | bool do_encrypt, | |
149 | struct smb_perfcount_data *pcd) | |
9254bb4e | 150 | { |
54c51a66 | 151 | size_t len = 0; |
9254bb4e JA |
152 | size_t nwritten=0; |
153 | ssize_t ret; | |
154 | char *buf_out = buffer; | |
977aa660 | 155 | |
1808dd0a | 156 | smbd_lock_socket(sconn); |
9254bb4e | 157 | |
c16c90a1 SM |
158 | if (do_signing) { |
159 | /* Sign the outgoing packet if required. */ | |
1808dd0a | 160 | srv_calculate_sign_mac(sconn, buf_out, seqnum); |
c16c90a1 | 161 | } |
9254bb4e JA |
162 | |
163 | if (do_encrypt) { | |
7e70f853 | 164 | NTSTATUS status = srv_encrypt_buffer(sconn, buffer, &buf_out); |
9254bb4e JA |
165 | if (!NT_STATUS_IS_OK(status)) { |
166 | DEBUG(0, ("send_smb: SMB encryption failed " | |
167 | "on outgoing packet! Error %s\n", | |
168 | nt_errstr(status) )); | |
54c51a66 | 169 | goto out; |
9254bb4e JA |
170 | } |
171 | } | |
172 | ||
d5693d99 | 173 | len = smb_len_large(buf_out) + 4; |
9254bb4e | 174 | |
1808dd0a | 175 | ret = write_data(sconn->sock, buf_out+nwritten, len - nwritten); |
c344ad30 | 176 | if (ret <= 0) { |
40ae8b74 VL |
177 | |
178 | char addr[INET6_ADDRSTRLEN]; | |
179 | /* | |
180 | * Try and give an error message saying what | |
181 | * client failed. | |
182 | */ | |
51bc104c | 183 | DEBUG(1,("pid[%d] Error writing %d bytes to client %s. %d. (%s)\n", |
c0288e06 | 184 | (int)getpid(), (int)len, |
1808dd0a | 185 | get_peer_addr(sconn->sock, addr, sizeof(addr)), |
40ae8b74 VL |
186 | (int)ret, strerror(errno) )); |
187 | ||
08262fe9 | 188 | srv_free_enc_buffer(sconn, buf_out); |
c344ad30 | 189 | goto out; |
9254bb4e JA |
190 | } |
191 | ||
54c51a66 | 192 | SMB_PERFCOUNT_SET_MSGLEN_OUT(pcd, len); |
08262fe9 | 193 | srv_free_enc_buffer(sconn, buf_out); |
54c51a66 | 194 | out: |
195 | SMB_PERFCOUNT_END(pcd); | |
977aa660 | 196 | |
1808dd0a | 197 | smbd_unlock_socket(sconn); |
9254bb4e JA |
198 | return true; |
199 | } | |
200 | ||
afc93255 JA |
201 | /******************************************************************* |
202 | Setup the word count and byte count for a smb message. | |
afc93255 JA |
203 | ********************************************************************/ |
204 | ||
9254bb4e | 205 | int srv_set_message(char *buf, |
afc93255 JA |
206 | int num_words, |
207 | int num_bytes, | |
208 | bool zero) | |
209 | { | |
210 | if (zero && (num_words || num_bytes)) { | |
211 | memset(buf + smb_size,'\0',num_words*2 + num_bytes); | |
212 | } | |
213 | SCVAL(buf,smb_wct,num_words); | |
214 | SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes); | |
9254bb4e | 215 | smb_setlen(buf,(smb_size + num_words*2 + num_bytes - 4)); |
afc93255 JA |
216 | return (smb_size + num_words*2 + num_bytes); |
217 | } | |
218 | ||
b4b9918c VL |
219 | static bool valid_smb_header(struct smbd_server_connection *sconn, |
220 | const uint8_t *inbuf) | |
afc93255 | 221 | { |
f9ef138e | 222 | if (is_encrypted_packet(sconn, inbuf)) { |
9254bb4e | 223 | return true; |
afc93255 | 224 | } |
1510b7b8 VL |
225 | /* |
226 | * This used to be (strncmp(smb_base(inbuf),"\377SMB",4) == 0) | |
227 | * but it just looks weird to call strncmp for this one. | |
228 | */ | |
229 | return (IVAL(smb_base(inbuf), 0) == 0x424D53FF); | |
afc93255 JA |
230 | } |
231 | ||
695c4a7a JA |
232 | /* Socket functions for smbd packet processing. */ |
233 | ||
58fbb512 | 234 | static bool valid_packet_size(size_t len) |
695c4a7a JA |
235 | { |
236 | /* | |
237 | * A WRITEX with CAP_LARGE_WRITEX can be 64k worth of data plus 65 bytes | |
238 | * of header. Don't print the error if this fits.... JRA. | |
239 | */ | |
240 | ||
241 | if (len > (BUFFER_SIZE + LARGE_WRITEX_HDR_SIZE)) { | |
242 | DEBUG(0,("Invalid packet length! (%lu bytes).\n", | |
243 | (unsigned long)len)); | |
d36434f3 | 244 | return false; |
695c4a7a JA |
245 | } |
246 | return true; | |
247 | } | |
248 | ||
e604e137 VL |
249 | static NTSTATUS read_packet_remainder(int fd, char *buffer, |
250 | unsigned int timeout, ssize_t len) | |
695c4a7a | 251 | { |
9671547d VL |
252 | NTSTATUS status; |
253 | ||
48b1ee61 | 254 | if (len <= 0) { |
e604e137 | 255 | return NT_STATUS_OK; |
48b1ee61 | 256 | } |
695c4a7a | 257 | |
9671547d VL |
258 | status = read_fd_with_timeout(fd, buffer, len, len, timeout, NULL); |
259 | if (!NT_STATUS_IS_OK(status)) { | |
260 | char addr[INET6_ADDRSTRLEN]; | |
261 | DEBUG(0, ("read_fd_with_timeout failed for client %s read " | |
262 | "error = %s.\n", | |
263 | get_peer_addr(fd, addr, sizeof(addr)), | |
264 | nt_errstr(status))); | |
265 | } | |
266 | return status; | |
695c4a7a JA |
267 | } |
268 | ||
269 | /**************************************************************************** | |
270 | Attempt a zerocopy writeX read. We know here that len > smb_size-4 | |
271 | ****************************************************************************/ | |
272 | ||
273 | /* | |
274 | * Unfortunately, earlier versions of smbclient/libsmbclient | |
275 | * don't send this "standard" writeX header. I've fixed this | |
276 | * for 3.2 but we'll use the old method with earlier versions. | |
277 | * Windows and CIFSFS at least use this standard size. Not | |
278 | * sure about MacOSX. | |
279 | */ | |
280 | ||
281 | #define STANDARD_WRITE_AND_X_HEADER_SIZE (smb_size - 4 + /* basic header */ \ | |
282 | (2*14) + /* word count (including bcc) */ \ | |
283 | 1 /* pad byte */) | |
284 | ||
250b2b64 VL |
285 | static NTSTATUS receive_smb_raw_talloc_partial_read(TALLOC_CTX *mem_ctx, |
286 | const char lenbuf[4], | |
fa0de395 | 287 | struct smbd_server_connection *sconn, |
8b5d163d | 288 | int sock, |
fa0de395 | 289 | char **buffer, |
250b2b64 VL |
290 | unsigned int timeout, |
291 | size_t *p_unread, | |
292 | size_t *len_ret) | |
695c4a7a JA |
293 | { |
294 | /* Size of a WRITEX call (+4 byte len). */ | |
295 | char writeX_header[4 + STANDARD_WRITE_AND_X_HEADER_SIZE]; | |
296 | ssize_t len = smb_len_large(lenbuf); /* Could be a UNIX large writeX. */ | |
297 | ssize_t toread; | |
250b2b64 | 298 | NTSTATUS status; |
695c4a7a | 299 | |
227718cd | 300 | memcpy(writeX_header, lenbuf, 4); |
695c4a7a | 301 | |
43c766a1 | 302 | status = read_fd_with_timeout( |
8b5d163d | 303 | sock, writeX_header + 4, |
250b2b64 VL |
304 | STANDARD_WRITE_AND_X_HEADER_SIZE, |
305 | STANDARD_WRITE_AND_X_HEADER_SIZE, | |
306 | timeout, NULL); | |
695c4a7a | 307 | |
250b2b64 | 308 | if (!NT_STATUS_IS_OK(status)) { |
9671547d | 309 | DEBUG(0, ("read_fd_with_timeout failed for client %s read " |
a513086c AS |
310 | "error = %s.\n", |
311 | tsocket_address_string(sconn->remote_address, | |
312 | talloc_tos()), | |
9671547d | 313 | nt_errstr(status))); |
250b2b64 | 314 | return status; |
695c4a7a JA |
315 | } |
316 | ||
317 | /* | |
318 | * Ok - now try and see if this is a possible | |
319 | * valid writeX call. | |
320 | */ | |
321 | ||
fa0de395 | 322 | if (is_valid_writeX_buffer(sconn, (uint8_t *)writeX_header)) { |
695c4a7a JA |
323 | /* |
324 | * If the data offset is beyond what | |
325 | * we've read, drain the extra bytes. | |
326 | */ | |
327 | uint16_t doff = SVAL(writeX_header,smb_vwv11); | |
328 | ssize_t newlen; | |
329 | ||
330 | if (doff > STANDARD_WRITE_AND_X_HEADER_SIZE) { | |
331 | size_t drain = doff - STANDARD_WRITE_AND_X_HEADER_SIZE; | |
8b5d163d | 332 | if (drain_socket(sock, drain) != drain) { |
695c4a7a JA |
333 | smb_panic("receive_smb_raw_talloc_partial_read:" |
334 | " failed to drain pending bytes"); | |
335 | } | |
336 | } else { | |
337 | doff = STANDARD_WRITE_AND_X_HEADER_SIZE; | |
338 | } | |
339 | ||
340 | /* Spoof down the length and null out the bcc. */ | |
341 | set_message_bcc(writeX_header, 0); | |
342 | newlen = smb_len(writeX_header); | |
343 | ||
344 | /* Copy the header we've written. */ | |
345 | ||
8d4a8389 | 346 | *buffer = (char *)talloc_memdup(mem_ctx, |
695c4a7a JA |
347 | writeX_header, |
348 | sizeof(writeX_header)); | |
349 | ||
350 | if (*buffer == NULL) { | |
351 | DEBUG(0, ("Could not allocate inbuf of length %d\n", | |
352 | (int)sizeof(writeX_header))); | |
250b2b64 | 353 | return NT_STATUS_NO_MEMORY; |
695c4a7a JA |
354 | } |
355 | ||
356 | /* Work out the remaining bytes. */ | |
357 | *p_unread = len - STANDARD_WRITE_AND_X_HEADER_SIZE; | |
250b2b64 VL |
358 | *len_ret = newlen + 4; |
359 | return NT_STATUS_OK; | |
695c4a7a JA |
360 | } |
361 | ||
362 | if (!valid_packet_size(len)) { | |
250b2b64 | 363 | return NT_STATUS_INVALID_PARAMETER; |
695c4a7a JA |
364 | } |
365 | ||
366 | /* | |
367 | * Not a valid writeX call. Just do the standard | |
368 | * talloc and return. | |
369 | */ | |
370 | ||
3d151376 | 371 | *buffer = talloc_array(mem_ctx, char, len+4); |
695c4a7a JA |
372 | |
373 | if (*buffer == NULL) { | |
374 | DEBUG(0, ("Could not allocate inbuf of length %d\n", | |
375 | (int)len+4)); | |
250b2b64 | 376 | return NT_STATUS_NO_MEMORY; |
695c4a7a JA |
377 | } |
378 | ||
379 | /* Copy in what we already read. */ | |
380 | memcpy(*buffer, | |
381 | writeX_header, | |
382 | 4 + STANDARD_WRITE_AND_X_HEADER_SIZE); | |
383 | toread = len - STANDARD_WRITE_AND_X_HEADER_SIZE; | |
384 | ||
385 | if(toread > 0) { | |
e604e137 | 386 | status = read_packet_remainder( |
8b5d163d | 387 | sock, |
fa0de395 | 388 | (*buffer) + 4 + STANDARD_WRITE_AND_X_HEADER_SIZE, |
e604e137 VL |
389 | timeout, toread); |
390 | ||
391 | if (!NT_STATUS_IS_OK(status)) { | |
8ca459e0 JA |
392 | DEBUG(10, ("receive_smb_raw_talloc_partial_read: %s\n", |
393 | nt_errstr(status))); | |
250b2b64 | 394 | return status; |
695c4a7a JA |
395 | } |
396 | } | |
397 | ||
250b2b64 VL |
398 | *len_ret = len + 4; |
399 | return NT_STATUS_OK; | |
695c4a7a JA |
400 | } |
401 | ||
a2db154c VL |
402 | static NTSTATUS receive_smb_raw_talloc(TALLOC_CTX *mem_ctx, |
403 | struct smbd_server_connection *sconn, | |
8b5d163d | 404 | int sock, |
9fe66ddd VL |
405 | char **buffer, unsigned int timeout, |
406 | size_t *p_unread, size_t *plen) | |
695c4a7a JA |
407 | { |
408 | char lenbuf[4]; | |
0afbfa42 | 409 | size_t len; |
695c4a7a | 410 | int min_recv_size = lp_min_receive_file_size(); |
0afbfa42 | 411 | NTSTATUS status; |
695c4a7a | 412 | |
695c4a7a JA |
413 | *p_unread = 0; |
414 | ||
8b5d163d | 415 | status = read_smb_length_return_keepalive(sock, lenbuf, timeout, |
a2db154c | 416 | &len); |
0afbfa42 | 417 | if (!NT_STATUS_IS_OK(status)) { |
9fe66ddd | 418 | return status; |
695c4a7a JA |
419 | } |
420 | ||
dea223ba TP |
421 | if (CVAL(lenbuf,0) == 0 && min_recv_size && |
422 | (smb_len_large(lenbuf) > /* Could be a UNIX large writeX. */ | |
423 | (min_recv_size + STANDARD_WRITE_AND_X_HEADER_SIZE)) && | |
a2db154c VL |
424 | !srv_is_signing_active(sconn) && |
425 | sconn->smb1.echo_handler.trusted_fde == NULL) { | |
695c4a7a | 426 | |
8ca459e0 | 427 | return receive_smb_raw_talloc_partial_read( |
8b5d163d | 428 | mem_ctx, lenbuf, sconn, sock, buffer, timeout, |
fa0de395 | 429 | p_unread, plen); |
695c4a7a JA |
430 | } |
431 | ||
432 | if (!valid_packet_size(len)) { | |
9fe66ddd | 433 | return NT_STATUS_INVALID_PARAMETER; |
695c4a7a JA |
434 | } |
435 | ||
436 | /* | |
437 | * The +4 here can't wrap, we've checked the length above already. | |
438 | */ | |
439 | ||
3d151376 | 440 | *buffer = talloc_array(mem_ctx, char, len+4); |
695c4a7a JA |
441 | |
442 | if (*buffer == NULL) { | |
443 | DEBUG(0, ("Could not allocate inbuf of length %d\n", | |
444 | (int)len+4)); | |
9fe66ddd | 445 | return NT_STATUS_NO_MEMORY; |
695c4a7a JA |
446 | } |
447 | ||
448 | memcpy(*buffer, lenbuf, sizeof(lenbuf)); | |
449 | ||
8b5d163d | 450 | status = read_packet_remainder(sock, (*buffer)+4, timeout, len); |
e604e137 | 451 | if (!NT_STATUS_IS_OK(status)) { |
9fe66ddd | 452 | return status; |
695c4a7a JA |
453 | } |
454 | ||
9fe66ddd VL |
455 | *plen = len + 4; |
456 | return NT_STATUS_OK; | |
695c4a7a JA |
457 | } |
458 | ||
63e08ef8 VL |
459 | static NTSTATUS receive_smb_talloc(TALLOC_CTX *mem_ctx, |
460 | struct smbd_server_connection *sconn, | |
8b5d163d | 461 | int sock, |
e514cd0a VL |
462 | char **buffer, unsigned int timeout, |
463 | size_t *p_unread, bool *p_encrypted, | |
c16c90a1 | 464 | size_t *p_len, |
b2c107ff SM |
465 | uint32_t *seqnum, |
466 | bool trusted_channel) | |
695c4a7a | 467 | { |
47666c93 | 468 | size_t len = 0; |
9fe66ddd | 469 | NTSTATUS status; |
695c4a7a | 470 | |
9254bb4e JA |
471 | *p_encrypted = false; |
472 | ||
8b5d163d | 473 | status = receive_smb_raw_talloc(mem_ctx, sconn, sock, buffer, timeout, |
63e08ef8 | 474 | p_unread, &len); |
9fe66ddd | 475 | if (!NT_STATUS_IS_OK(status)) { |
b99becd4 CA |
476 | DEBUG(NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)?5:1, |
477 | ("receive_smb_raw_talloc failed for client %s " | |
478 | "read error = %s.\n", | |
479 | tsocket_address_string(sconn->remote_address, | |
480 | talloc_tos()), | |
481 | nt_errstr(status)) ); | |
e514cd0a | 482 | return status; |
695c4a7a JA |
483 | } |
484 | ||
f9ef138e | 485 | if (is_encrypted_packet(sconn, (uint8_t *)*buffer)) { |
d4c4705e | 486 | status = srv_decrypt_buffer(sconn, *buffer); |
afc93255 JA |
487 | if (!NT_STATUS_IS_OK(status)) { |
488 | DEBUG(0, ("receive_smb_talloc: SMB decryption failed on " | |
489 | "incoming packet! Error %s\n", | |
490 | nt_errstr(status) )); | |
e514cd0a | 491 | return status; |
afc93255 | 492 | } |
9254bb4e | 493 | *p_encrypted = true; |
afc93255 JA |
494 | } |
495 | ||
695c4a7a | 496 | /* Check the incoming SMB signature. */ |
63e08ef8 | 497 | if (!srv_check_sign_mac(sconn, *buffer, seqnum, trusted_channel)) { |
695c4a7a JA |
498 | DEBUG(0, ("receive_smb: SMB Signature verification failed on " |
499 | "incoming packet!\n")); | |
e514cd0a | 500 | return NT_STATUS_INVALID_NETWORK_RESPONSE; |
695c4a7a JA |
501 | } |
502 | ||
e514cd0a VL |
503 | *p_len = len; |
504 | return NT_STATUS_OK; | |
695c4a7a JA |
505 | } |
506 | ||
0bc56a2e VL |
507 | /* |
508 | * Initialize a struct smb_request from an inbuf | |
509 | */ | |
510 | ||
d7bc5fe7 VL |
511 | static bool init_smb_request(struct smb_request *req, |
512 | struct smbd_server_connection *sconn, | |
513 | const uint8 *inbuf, | |
9b4b9d26 VL |
514 | size_t unread_bytes, bool encrypted, |
515 | uint32_t seqnum) | |
0bc56a2e | 516 | { |
faa8edcc SM |
517 | struct smbXsrv_tcon *tcon; |
518 | NTSTATUS status; | |
519 | NTTIME now; | |
ed70bc0d | 520 | size_t req_size = smb_len(inbuf) + 4; |
d8b3687f | 521 | |
ed70bc0d | 522 | /* Ensure we have at least smb_size bytes. */ |
a1f593cd JA |
523 | if (req_size < smb_size) { |
524 | DEBUG(0,("init_smb_request: invalid request size %u\n", | |
525 | (unsigned int)req_size )); | |
b7898148 | 526 | return false; |
a1f593cd | 527 | } |
d8b3687f SM |
528 | |
529 | req->request_time = timeval_current(); | |
faa8edcc | 530 | now = timeval_to_nttime(&req->request_time); |
d8b3687f | 531 | |
7808a259 | 532 | req->cmd = CVAL(inbuf, smb_com); |
0bc56a2e VL |
533 | req->flags2 = SVAL(inbuf, smb_flg2); |
534 | req->smbpid = SVAL(inbuf, smb_pid); | |
79842437 | 535 | req->mid = (uint64_t)SVAL(inbuf, smb_mid); |
9b4b9d26 | 536 | req->seqnum = seqnum; |
0bc56a2e | 537 | req->vuid = SVAL(inbuf, smb_uid); |
cc6a4101 VL |
538 | req->tid = SVAL(inbuf, smb_tid); |
539 | req->wct = CVAL(inbuf, smb_wct); | |
f1dc8b28 | 540 | req->vwv = (const uint16_t *)(inbuf+smb_vwv); |
7f9d6f80 | 541 | req->buflen = smb_buflen(inbuf); |
4f41be35 | 542 | req->buf = (const uint8_t *)smb_buf_const(inbuf); |
c3250149 | 543 | req->unread_bytes = unread_bytes; |
9254bb4e | 544 | req->encrypted = encrypted; |
edfc7eaf | 545 | req->sconn = sconn; |
faa8edcc SM |
546 | status = smb1srv_tcon_lookup(sconn->conn, req->tid, now, &tcon); |
547 | if (NT_STATUS_IS_OK(status)) { | |
548 | req->conn = tcon->compat; | |
549 | } else { | |
550 | req->conn = NULL; | |
551 | } | |
d65afbe5 | 552 | req->chain_fsp = NULL; |
08b24e92 | 553 | req->smb2req = NULL; |
89c55485 | 554 | req->priv_paths = NULL; |
8f93068c | 555 | req->chain = NULL; |
54c51a66 | 556 | smb_init_perfcount_data(&req->pcd); |
c3250149 | 557 | |
a662a62e | 558 | /* Ensure we have at least wct words and 2 bytes of bcc. */ |
a1f593cd JA |
559 | if (smb_size + req->wct*2 > req_size) { |
560 | DEBUG(0,("init_smb_request: invalid wct number %u (size %u)\n", | |
561 | (unsigned int)req->wct, | |
562 | (unsigned int)req_size)); | |
b7898148 | 563 | return false; |
a1f593cd | 564 | } |
a662a62e | 565 | /* Ensure bcc is correct. */ |
4f41be35 | 566 | if (((const uint8_t *)smb_buf_const(inbuf)) + req->buflen > inbuf + req_size) { |
a662a62e JA |
567 | DEBUG(0,("init_smb_request: invalid bcc number %u " |
568 | "(wct = %u, size %u)\n", | |
7f9d6f80 | 569 | (unsigned int)req->buflen, |
a662a62e JA |
570 | (unsigned int)req->wct, |
571 | (unsigned int)req_size)); | |
b7898148 | 572 | return false; |
a662a62e | 573 | } |
54c51a66 | 574 | |
cc6a4101 | 575 | req->outbuf = NULL; |
b7898148 | 576 | return true; |
0bc56a2e VL |
577 | } |
578 | ||
aeb798c3 SM |
579 | static void process_smb(struct smbd_server_connection *conn, |
580 | uint8_t *inbuf, size_t nread, size_t unread_bytes, | |
c16c90a1 SM |
581 | uint32_t seqnum, bool encrypted, |
582 | struct smb_perfcount_data *deferred_pcd); | |
aeb798c3 | 583 | |
415e8e05 | 584 | static void smbd_deferred_open_timer(struct tevent_context *ev, |
aeb798c3 SM |
585 | struct timed_event *te, |
586 | struct timeval _tval, | |
587 | void *private_data) | |
588 | { | |
589 | struct pending_message_list *msg = talloc_get_type(private_data, | |
590 | struct pending_message_list); | |
8b2b7d1c | 591 | struct smbd_server_connection *sconn = msg->sconn; |
aeb798c3 | 592 | TALLOC_CTX *mem_ctx = talloc_tos(); |
79842437 | 593 | uint64_t mid = (uint64_t)SVAL(msg->buf.data,smb_mid); |
aeb798c3 SM |
594 | uint8_t *inbuf; |
595 | ||
50aa8a4a VL |
596 | inbuf = (uint8_t *)talloc_memdup(mem_ctx, msg->buf.data, |
597 | msg->buf.length); | |
aeb798c3 SM |
598 | if (inbuf == NULL) { |
599 | exit_server("smbd_deferred_open_timer: talloc failed\n"); | |
600 | return; | |
601 | } | |
602 | ||
603 | /* We leave this message on the queue so the open code can | |
604 | know this is a retry. */ | |
79842437 JA |
605 | DEBUG(5,("smbd_deferred_open_timer: trigger mid %llu.\n", |
606 | (unsigned long long)mid )); | |
8a6b90d4 JA |
607 | |
608 | /* Mark the message as processed so this is not | |
609 | * re-processed in error. */ | |
610 | msg->processed = true; | |
aeb798c3 | 611 | |
8b2b7d1c | 612 | process_smb(sconn, inbuf, |
aeb798c3 | 613 | msg->buf.length, 0, |
c16c90a1 | 614 | msg->seqnum, msg->encrypted, &msg->pcd); |
8a6b90d4 JA |
615 | |
616 | /* If it's still there and was processed, remove it. */ | |
8b2b7d1c | 617 | msg = get_deferred_open_message_smb(sconn, mid); |
8a6b90d4 | 618 | if (msg && msg->processed) { |
8b2b7d1c | 619 | remove_deferred_open_message_smb(sconn, mid); |
8a6b90d4 | 620 | } |
aeb798c3 | 621 | } |
aab2fe02 JA |
622 | |
623 | /**************************************************************************** | |
e5a95132 GJC |
624 | Function to push a message onto the tail of a linked list of smb messages ready |
625 | for processing. | |
aab2fe02 JA |
626 | ****************************************************************************/ |
627 | ||
30191d1a | 628 | static bool push_queued_message(struct smb_request *req, |
54abd2aa GC |
629 | struct timeval request_time, |
630 | struct timeval end_time, | |
631 | char *private_data, size_t private_len) | |
aab2fe02 | 632 | { |
b578db69 | 633 | int msg_len = smb_len(req->inbuf) + 4; |
54abd2aa GC |
634 | struct pending_message_list *msg; |
635 | ||
ad0a07c5 | 636 | msg = talloc_zero(NULL, struct pending_message_list); |
aab2fe02 | 637 | |
1eff0523 JA |
638 | if(msg == NULL) { |
639 | DEBUG(0,("push_message: malloc fail (1)\n")); | |
640 | return False; | |
641 | } | |
8b2b7d1c | 642 | msg->sconn = req->sconn; |
aab2fe02 | 643 | |
b578db69 | 644 | msg->buf = data_blob_talloc(msg, req->inbuf, msg_len); |
2fc57c9a | 645 | if(msg->buf.data == NULL) { |
1eff0523 | 646 | DEBUG(0,("push_message: malloc fail (2)\n")); |
fb5362c0 | 647 | TALLOC_FREE(msg); |
1eff0523 JA |
648 | return False; |
649 | } | |
aab2fe02 | 650 | |
54abd2aa | 651 | msg->request_time = request_time; |
c16c90a1 | 652 | msg->seqnum = req->seqnum; |
9254bb4e | 653 | msg->encrypted = req->encrypted; |
8a6b90d4 | 654 | msg->processed = false; |
54c51a66 | 655 | SMB_PERFCOUNT_DEFER_OP(&req->pcd, &msg->pcd); |
2fc57c9a | 656 | |
19ca97a7 | 657 | if (private_data) { |
54abd2aa GC |
658 | msg->private_data = data_blob_talloc(msg, private_data, |
659 | private_len); | |
2fc57c9a JA |
660 | if (msg->private_data.data == NULL) { |
661 | DEBUG(0,("push_message: malloc fail (3)\n")); | |
fb5362c0 | 662 | TALLOC_FREE(msg); |
b6fb0462 | 663 | return False; |
2fc57c9a JA |
664 | } |
665 | } | |
aab2fe02 | 666 | |
16cfc724 SM |
667 | msg->te = tevent_add_timer(msg->sconn->ev_ctx, |
668 | msg, | |
669 | end_time, | |
670 | smbd_deferred_open_timer, | |
671 | msg); | |
aeb798c3 SM |
672 | if (!msg->te) { |
673 | DEBUG(0,("push_message: event_add_timed failed\n")); | |
674 | TALLOC_FREE(msg); | |
675 | return false; | |
676 | } | |
677 | ||
d20e968c VL |
678 | DLIST_ADD_END(req->sconn->deferred_open_queue, msg, |
679 | struct pending_message_list *); | |
aab2fe02 | 680 | |
54abd2aa GC |
681 | DEBUG(10,("push_message: pushed message length %u on " |
682 | "deferred_open_queue\n", (unsigned int)msg_len)); | |
2fc57c9a | 683 | |
1eff0523 | 684 | return True; |
aab2fe02 JA |
685 | } |
686 | ||
2fc57c9a JA |
687 | /**************************************************************************** |
688 | Function to delete a sharing violation open message by mid. | |
689 | ****************************************************************************/ | |
690 | ||
04253dfd VL |
691 | void remove_deferred_open_message_smb(struct smbd_server_connection *sconn, |
692 | uint64_t mid) | |
2fc57c9a JA |
693 | { |
694 | struct pending_message_list *pml; | |
695 | ||
04253dfd VL |
696 | if (sconn->using_smb2) { |
697 | remove_deferred_open_message_smb2(sconn, mid); | |
e15939b4 JA |
698 | return; |
699 | } | |
700 | ||
d20e968c | 701 | for (pml = sconn->deferred_open_queue; pml; pml = pml->next) { |
79842437 | 702 | if (mid == (uint64_t)SVAL(pml->buf.data,smb_mid)) { |
e15939b4 | 703 | DEBUG(10,("remove_deferred_open_message_smb: " |
79842437 JA |
704 | "deleting mid %llu len %u\n", |
705 | (unsigned long long)mid, | |
54abd2aa | 706 | (unsigned int)pml->buf.length )); |
d20e968c | 707 | DLIST_REMOVE(sconn->deferred_open_queue, pml); |
fb5362c0 | 708 | TALLOC_FREE(pml); |
2fc57c9a JA |
709 | return; |
710 | } | |
711 | } | |
712 | } | |
713 | ||
714 | /**************************************************************************** | |
715 | Move a sharing violation open retry message to the front of the list and | |
716 | schedule it for immediate processing. | |
717 | ****************************************************************************/ | |
718 | ||
6617c2c1 | 719 | bool schedule_deferred_open_message_smb(struct smbd_server_connection *sconn, |
502fdae7 | 720 | uint64_t mid) |
2fc57c9a JA |
721 | { |
722 | struct pending_message_list *pml; | |
723 | int i = 0; | |
724 | ||
502fdae7 | 725 | if (sconn->using_smb2) { |
6617c2c1 | 726 | return schedule_deferred_open_message_smb2(sconn, mid); |
3413cf7a JA |
727 | } |
728 | ||
d20e968c | 729 | for (pml = sconn->deferred_open_queue; pml; pml = pml->next) { |
79842437 | 730 | uint64_t msg_mid = (uint64_t)SVAL(pml->buf.data,smb_mid); |
aeb798c3 | 731 | |
79842437 JA |
732 | DEBUG(10,("schedule_deferred_open_message_smb: [%d] " |
733 | "msg_mid = %llu\n", | |
734 | i++, | |
735 | (unsigned long long)msg_mid )); | |
aeb798c3 | 736 | |
2fc57c9a | 737 | if (mid == msg_mid) { |
aeb798c3 SM |
738 | struct timed_event *te; |
739 | ||
8a6b90d4 JA |
740 | if (pml->processed) { |
741 | /* A processed message should not be | |
742 | * rescheduled. */ | |
e15939b4 | 743 | DEBUG(0,("schedule_deferred_open_message_smb: LOGIC ERROR " |
79842437 JA |
744 | "message mid %llu was already processed\n", |
745 | (unsigned long long)msg_mid )); | |
8a6b90d4 JA |
746 | continue; |
747 | } | |
748 | ||
79842437 JA |
749 | DEBUG(10,("schedule_deferred_open_message_smb: " |
750 | "scheduling mid %llu\n", | |
751 | (unsigned long long)mid )); | |
aeb798c3 | 752 | |
16cfc724 SM |
753 | te = tevent_add_timer(pml->sconn->ev_ctx, |
754 | pml, | |
755 | timeval_zero(), | |
756 | smbd_deferred_open_timer, | |
757 | pml); | |
aeb798c3 | 758 | if (!te) { |
e15939b4 | 759 | DEBUG(10,("schedule_deferred_open_message_smb: " |
79842437 JA |
760 | "event_add_timed() failed, " |
761 | "skipping mid %llu\n", | |
762 | (unsigned long long)msg_mid )); | |
aeb798c3 SM |
763 | } |
764 | ||
765 | TALLOC_FREE(pml->te); | |
766 | pml->te = te; | |
d20e968c | 767 | DLIST_PROMOTE(sconn->deferred_open_queue, pml); |
6617c2c1 | 768 | return true; |
2fc57c9a JA |
769 | } |
770 | } | |
771 | ||
79842437 JA |
772 | DEBUG(10,("schedule_deferred_open_message_smb: failed to " |
773 | "find message mid %llu\n", | |
774 | (unsigned long long)mid )); | |
6617c2c1 JA |
775 | |
776 | return false; | |
2fc57c9a JA |
777 | } |
778 | ||
779 | /**************************************************************************** | |
8a6b90d4 | 780 | Return true if this mid is on the deferred queue and was not yet processed. |
2fc57c9a JA |
781 | ****************************************************************************/ |
782 | ||
f9d183f9 | 783 | bool open_was_deferred(struct smbd_server_connection *sconn, uint64_t mid) |
2fc57c9a JA |
784 | { |
785 | struct pending_message_list *pml; | |
3e0f5862 | 786 | |
f9d183f9 VL |
787 | if (sconn->using_smb2) { |
788 | return open_was_deferred_smb2(sconn, mid); | |
e15939b4 JA |
789 | } |
790 | ||
d20e968c | 791 | for (pml = sconn->deferred_open_queue; pml; pml = pml->next) { |
79842437 | 792 | if (((uint64_t)SVAL(pml->buf.data,smb_mid)) == mid && !pml->processed) { |
2fc57c9a JA |
793 | return True; |
794 | } | |
795 | } | |
796 | return False; | |
797 | } | |
798 | ||
799 | /**************************************************************************** | |
800 | Return the message queued by this mid. | |
801 | ****************************************************************************/ | |
802 | ||
cb69d105 VL |
803 | static struct pending_message_list *get_deferred_open_message_smb( |
804 | struct smbd_server_connection *sconn, uint64_t mid) | |
2fc57c9a JA |
805 | { |
806 | struct pending_message_list *pml; | |
3e0f5862 | 807 | |
d20e968c | 808 | for (pml = sconn->deferred_open_queue; pml; pml = pml->next) { |
79842437 | 809 | if (((uint64_t)SVAL(pml->buf.data,smb_mid)) == mid) { |
2fc57c9a JA |
810 | return pml; |
811 | } | |
812 | } | |
813 | return NULL; | |
814 | } | |
815 | ||
e15939b4 JA |
816 | /**************************************************************************** |
817 | Get the state data queued by this mid. | |
818 | ****************************************************************************/ | |
819 | ||
8f67f873 | 820 | bool get_deferred_open_message_state(struct smb_request *smbreq, |
e15939b4 JA |
821 | struct timeval *p_request_time, |
822 | void **pp_state) | |
823 | { | |
824 | struct pending_message_list *pml; | |
825 | ||
8b2b7d1c | 826 | if (smbreq->sconn->using_smb2) { |
8f67f873 | 827 | return get_deferred_open_message_state_smb2(smbreq->smb2req, |
e15939b4 JA |
828 | p_request_time, |
829 | pp_state); | |
830 | } | |
831 | ||
cb69d105 | 832 | pml = get_deferred_open_message_smb(smbreq->sconn, smbreq->mid); |
e15939b4 JA |
833 | if (!pml) { |
834 | return false; | |
835 | } | |
836 | if (p_request_time) { | |
837 | *p_request_time = pml->request_time; | |
838 | } | |
839 | if (pp_state) { | |
840 | *pp_state = (void *)pml->private_data.data; | |
841 | } | |
842 | return true; | |
843 | } | |
844 | ||
2fc57c9a | 845 | /**************************************************************************** |
54abd2aa GC |
846 | Function to push a deferred open smb message onto a linked list of local smb |
847 | messages ready for processing. | |
848 | ****************************************************************************/ | |
849 | ||
e15939b4 | 850 | bool push_deferred_open_message_smb(struct smb_request *req, |
54abd2aa GC |
851 | struct timeval request_time, |
852 | struct timeval timeout, | |
2bbb8c91 | 853 | struct file_id id, |
54abd2aa GC |
854 | char *private_data, size_t priv_len) |
855 | { | |
856 | struct timeval end_time; | |
857 | ||
e15939b4 | 858 | if (req->smb2req) { |
8f67f873 | 859 | return push_deferred_open_message_smb2(req->smb2req, |
e15939b4 JA |
860 | request_time, |
861 | timeout, | |
2bbb8c91 | 862 | id, |
e15939b4 JA |
863 | private_data, |
864 | priv_len); | |
865 | } | |
866 | ||
c3250149 | 867 | if (req->unread_bytes) { |
e15939b4 | 868 | DEBUG(0,("push_deferred_open_message_smb: logic error ! " |
c3250149 JA |
869 | "unread_bytes = %u\n", |
870 | (unsigned int)req->unread_bytes )); | |
e15939b4 | 871 | smb_panic("push_deferred_open_message_smb: " |
c3250149 JA |
872 | "logic error unread_bytes != 0" ); |
873 | } | |
874 | ||
54abd2aa GC |
875 | end_time = timeval_sum(&request_time, &timeout); |
876 | ||
79842437 JA |
877 | DEBUG(10,("push_deferred_open_message_smb: pushing message " |
878 | "len %u mid %llu timeout time [%u.%06u]\n", | |
879 | (unsigned int) smb_len(req->inbuf)+4, | |
880 | (unsigned long long)req->mid, | |
881 | (unsigned int)end_time.tv_sec, | |
882 | (unsigned int)end_time.tv_usec)); | |
54abd2aa | 883 | |
b578db69 | 884 | return push_queued_message(req, request_time, end_time, |
54abd2aa GC |
885 | private_data, priv_len); |
886 | } | |
887 | ||
ac61f650 SM |
888 | static void smbd_sig_term_handler(struct tevent_context *ev, |
889 | struct tevent_signal *se, | |
890 | int signum, | |
891 | int count, | |
892 | void *siginfo, | |
893 | void *private_data) | |
894 | { | |
895 | exit_server_cleanly("termination signal"); | |
896 | } | |
897 | ||
8a834642 | 898 | void smbd_setup_sig_term_handler(struct smbd_server_connection *sconn) |
ac61f650 SM |
899 | { |
900 | struct tevent_signal *se; | |
901 | ||
8a834642 SM |
902 | se = tevent_add_signal(sconn->ev_ctx, |
903 | sconn, | |
ac61f650 SM |
904 | SIGTERM, 0, |
905 | smbd_sig_term_handler, | |
8a834642 | 906 | sconn); |
ac61f650 SM |
907 | if (!se) { |
908 | exit_server("failed to setup SIGTERM handler"); | |
909 | } | |
910 | } | |
911 | ||
912 | static void smbd_sig_hup_handler(struct tevent_context *ev, | |
913 | struct tevent_signal *se, | |
914 | int signum, | |
915 | int count, | |
916 | void *siginfo, | |
917 | void *private_data) | |
918 | { | |
290ce331 SM |
919 | struct smbd_server_connection *sconn = |
920 | talloc_get_type_abort(private_data, | |
921 | struct smbd_server_connection); | |
922 | ||
ac61f650 SM |
923 | change_to_root_user(); |
924 | DEBUG(1,("Reloading services after SIGHUP\n")); | |
03455519 | 925 | reload_services(sconn, conn_snum_used, false); |
ac61f650 SM |
926 | } |
927 | ||
290ce331 | 928 | void smbd_setup_sig_hup_handler(struct smbd_server_connection *sconn) |
ac61f650 SM |
929 | { |
930 | struct tevent_signal *se; | |
931 | ||
290ce331 SM |
932 | se = tevent_add_signal(sconn->ev_ctx, |
933 | sconn, | |
934 | SIGHUP, 0, | |
935 | smbd_sig_hup_handler, | |
936 | sconn); | |
ac61f650 SM |
937 | if (!se) { |
938 | exit_server("failed to setup SIGHUP handler"); | |
939 | } | |
940 | } | |
941 | ||
e412b8bf SM |
942 | static void smbd_conf_updated(struct messaging_context *msg, |
943 | void *private_data, | |
944 | uint32_t msg_type, | |
945 | struct server_id server_id, | |
946 | DATA_BLOB *data) | |
947 | { | |
948 | struct smbd_server_connection *sconn = | |
949 | talloc_get_type_abort(private_data, | |
950 | struct smbd_server_connection); | |
951 | ||
952 | DEBUG(10,("smbd_conf_updated: Got message saying smb.conf was " | |
953 | "updated. Reloading.\n")); | |
954 | change_to_root_user(); | |
03455519 | 955 | reload_services(sconn, conn_snum_used, false); |
e412b8bf SM |
956 | } |
957 | ||
22dbd677 JA |
958 | /* |
959 | * Only allow 5 outstanding trans requests. We're allocating memory, so | |
960 | * prevent a DoS. | |
961 | */ | |
aab2fe02 | 962 | |
79842437 | 963 | NTSTATUS allow_new_trans(struct trans_state *list, uint64_t mid) |
c3effa8b | 964 | { |
22dbd677 JA |
965 | int count = 0; |
966 | for (; list != NULL; list = list->next) { | |
c3effa8b | 967 | |
22dbd677 JA |
968 | if (list->mid == mid) { |
969 | return NT_STATUS_INVALID_PARAMETER; | |
970 | } | |
971 | ||
972 | count += 1; | |
973 | } | |
974 | if (count > 5) { | |
975 | return NT_STATUS_INSUFFICIENT_RESOURCES; | |
976 | } | |
c3effa8b | 977 | |
22dbd677 | 978 | return NT_STATUS_OK; |
c3effa8b AT |
979 | } |
980 | ||
c3effa8b AT |
981 | /* |
982 | These flags determine some of the permissions required to do an operation | |
983 | ||
984 | Note that I don't set NEED_WRITE on some write operations because they | |
985 | are used by some brain-dead clients when printing, and I don't want to | |
986 | force write permissions on print services. | |
987 | */ | |
988 | #define AS_USER (1<<0) | |
ce61fb21 | 989 | #define NEED_WRITE (1<<1) /* Must be paired with AS_USER */ |
c3effa8b | 990 | #define TIME_INIT (1<<2) |
ce61fb21 JA |
991 | #define CAN_IPC (1<<3) /* Must be paired with AS_USER */ |
992 | #define AS_GUEST (1<<5) /* Must *NOT* be paired with AS_USER */ | |
54abd2aa | 993 | #define DO_CHDIR (1<<6) |
c3effa8b AT |
994 | |
995 | /* | |
996 | define a list of possible SMB messages and their corresponding | |
997 | functions. Any message that has a NULL function is unimplemented - | |
998 | please feel free to contribute implementations! | |
999 | */ | |
1eff0523 JA |
1000 | static const struct smb_message_struct { |
1001 | const char *name; | |
48d3a1d2 | 1002 | void (*fn)(struct smb_request *req); |
1eff0523 JA |
1003 | int flags; |
1004 | } smb_messages[256] = { | |
918c3ebe | 1005 | |
b578db69 VL |
1006 | /* 0x00 */ { "SMBmkdir",reply_mkdir,AS_USER | NEED_WRITE}, |
1007 | /* 0x01 */ { "SMBrmdir",reply_rmdir,AS_USER | NEED_WRITE}, | |
1008 | /* 0x02 */ { "SMBopen",reply_open,AS_USER }, | |
1009 | /* 0x03 */ { "SMBcreate",reply_mknew,AS_USER}, | |
1010 | /* 0x04 */ { "SMBclose",reply_close,AS_USER | CAN_IPC }, | |
1011 | /* 0x05 */ { "SMBflush",reply_flush,AS_USER}, | |
1012 | /* 0x06 */ { "SMBunlink",reply_unlink,AS_USER | NEED_WRITE }, | |
1013 | /* 0x07 */ { "SMBmv",reply_mv,AS_USER | NEED_WRITE }, | |
1014 | /* 0x08 */ { "SMBgetatr",reply_getatr,AS_USER}, | |
1015 | /* 0x09 */ { "SMBsetatr",reply_setatr,AS_USER | NEED_WRITE}, | |
1016 | /* 0x0a */ { "SMBread",reply_read,AS_USER}, | |
1017 | /* 0x0b */ { "SMBwrite",reply_write,AS_USER | CAN_IPC }, | |
1018 | /* 0x0c */ { "SMBlock",reply_lock,AS_USER}, | |
1019 | /* 0x0d */ { "SMBunlock",reply_unlock,AS_USER}, | |
1020 | /* 0x0e */ { "SMBctemp",reply_ctemp,AS_USER }, | |
1021 | /* 0x0f */ { "SMBmknew",reply_mknew,AS_USER}, | |
1022 | /* 0x10 */ { "SMBcheckpath",reply_checkpath,AS_USER}, | |
1023 | /* 0x11 */ { "SMBexit",reply_exit,DO_CHDIR}, | |
1024 | /* 0x12 */ { "SMBlseek",reply_lseek,AS_USER}, | |
1025 | /* 0x13 */ { "SMBlockread",reply_lockread,AS_USER}, | |
1026 | /* 0x14 */ { "SMBwriteunlock",reply_writeunlock,AS_USER}, | |
1027 | /* 0x15 */ { NULL, NULL, 0 }, | |
1028 | /* 0x16 */ { NULL, NULL, 0 }, | |
1029 | /* 0x17 */ { NULL, NULL, 0 }, | |
1030 | /* 0x18 */ { NULL, NULL, 0 }, | |
1031 | /* 0x19 */ { NULL, NULL, 0 }, | |
1032 | /* 0x1a */ { "SMBreadbraw",reply_readbraw,AS_USER}, | |
1033 | /* 0x1b */ { "SMBreadBmpx",reply_readbmpx,AS_USER}, | |
1034 | /* 0x1c */ { "SMBreadBs",reply_readbs,AS_USER }, | |
1035 | /* 0x1d */ { "SMBwritebraw",reply_writebraw,AS_USER}, | |
1036 | /* 0x1e */ { "SMBwriteBmpx",reply_writebmpx,AS_USER}, | |
1037 | /* 0x1f */ { "SMBwriteBs",reply_writebs,AS_USER}, | |
1038 | /* 0x20 */ { "SMBwritec", NULL,0}, | |
1039 | /* 0x21 */ { NULL, NULL, 0 }, | |
1040 | /* 0x22 */ { "SMBsetattrE",reply_setattrE,AS_USER | NEED_WRITE }, | |
1041 | /* 0x23 */ { "SMBgetattrE",reply_getattrE,AS_USER }, | |
1042 | /* 0x24 */ { "SMBlockingX",reply_lockingX,AS_USER }, | |
1043 | /* 0x25 */ { "SMBtrans",reply_trans,AS_USER | CAN_IPC }, | |
1044 | /* 0x26 */ { "SMBtranss",reply_transs,AS_USER | CAN_IPC}, | |
1045 | /* 0x27 */ { "SMBioctl",reply_ioctl,0}, | |
1046 | /* 0x28 */ { "SMBioctls", NULL,AS_USER}, | |
1047 | /* 0x29 */ { "SMBcopy",reply_copy,AS_USER | NEED_WRITE }, | |
1048 | /* 0x2a */ { "SMBmove", NULL,AS_USER | NEED_WRITE }, | |
1049 | /* 0x2b */ { "SMBecho",reply_echo,0}, | |
1050 | /* 0x2c */ { "SMBwriteclose",reply_writeclose,AS_USER}, | |
1051 | /* 0x2d */ { "SMBopenX",reply_open_and_X,AS_USER | CAN_IPC }, | |
1052 | /* 0x2e */ { "SMBreadX",reply_read_and_X,AS_USER | CAN_IPC }, | |
1053 | /* 0x2f */ { "SMBwriteX",reply_write_and_X,AS_USER | CAN_IPC }, | |
1054 | /* 0x30 */ { NULL, NULL, 0 }, | |
1055 | /* 0x31 */ { NULL, NULL, 0 }, | |
1056 | /* 0x32 */ { "SMBtrans2",reply_trans2, AS_USER | CAN_IPC }, | |
7716ad68 | 1057 | /* 0x33 */ { "SMBtranss2",reply_transs2, AS_USER | CAN_IPC }, |
b578db69 VL |
1058 | /* 0x34 */ { "SMBfindclose",reply_findclose,AS_USER}, |
1059 | /* 0x35 */ { "SMBfindnclose",reply_findnclose,AS_USER}, | |
1060 | /* 0x36 */ { NULL, NULL, 0 }, | |
1061 | /* 0x37 */ { NULL, NULL, 0 }, | |
1062 | /* 0x38 */ { NULL, NULL, 0 }, | |
1063 | /* 0x39 */ { NULL, NULL, 0 }, | |
1064 | /* 0x3a */ { NULL, NULL, 0 }, | |
1065 | /* 0x3b */ { NULL, NULL, 0 }, | |
1066 | /* 0x3c */ { NULL, NULL, 0 }, | |
1067 | /* 0x3d */ { NULL, NULL, 0 }, | |
1068 | /* 0x3e */ { NULL, NULL, 0 }, | |
1069 | /* 0x3f */ { NULL, NULL, 0 }, | |
1070 | /* 0x40 */ { NULL, NULL, 0 }, | |
1071 | /* 0x41 */ { NULL, NULL, 0 }, | |
1072 | /* 0x42 */ { NULL, NULL, 0 }, | |
1073 | /* 0x43 */ { NULL, NULL, 0 }, | |
1074 | /* 0x44 */ { NULL, NULL, 0 }, | |
1075 | /* 0x45 */ { NULL, NULL, 0 }, | |
1076 | /* 0x46 */ { NULL, NULL, 0 }, | |
1077 | /* 0x47 */ { NULL, NULL, 0 }, | |
1078 | /* 0x48 */ { NULL, NULL, 0 }, | |
1079 | /* 0x49 */ { NULL, NULL, 0 }, | |
1080 | /* 0x4a */ { NULL, NULL, 0 }, | |
1081 | /* 0x4b */ { NULL, NULL, 0 }, | |
1082 | /* 0x4c */ { NULL, NULL, 0 }, | |
1083 | /* 0x4d */ { NULL, NULL, 0 }, | |
1084 | /* 0x4e */ { NULL, NULL, 0 }, | |
1085 | /* 0x4f */ { NULL, NULL, 0 }, | |
1086 | /* 0x50 */ { NULL, NULL, 0 }, | |
1087 | /* 0x51 */ { NULL, NULL, 0 }, | |
1088 | /* 0x52 */ { NULL, NULL, 0 }, | |
1089 | /* 0x53 */ { NULL, NULL, 0 }, | |
1090 | /* 0x54 */ { NULL, NULL, 0 }, | |
1091 | /* 0x55 */ { NULL, NULL, 0 }, | |
1092 | /* 0x56 */ { NULL, NULL, 0 }, | |
1093 | /* 0x57 */ { NULL, NULL, 0 }, | |
1094 | /* 0x58 */ { NULL, NULL, 0 }, | |
1095 | /* 0x59 */ { NULL, NULL, 0 }, | |
1096 | /* 0x5a */ { NULL, NULL, 0 }, | |
1097 | /* 0x5b */ { NULL, NULL, 0 }, | |
1098 | /* 0x5c */ { NULL, NULL, 0 }, | |
1099 | /* 0x5d */ { NULL, NULL, 0 }, | |
1100 | /* 0x5e */ { NULL, NULL, 0 }, | |
1101 | /* 0x5f */ { NULL, NULL, 0 }, | |
1102 | /* 0x60 */ { NULL, NULL, 0 }, | |
1103 | /* 0x61 */ { NULL, NULL, 0 }, | |
1104 | /* 0x62 */ { NULL, NULL, 0 }, | |
1105 | /* 0x63 */ { NULL, NULL, 0 }, | |
1106 | /* 0x64 */ { NULL, NULL, 0 }, | |
1107 | /* 0x65 */ { NULL, NULL, 0 }, | |
1108 | /* 0x66 */ { NULL, NULL, 0 }, | |
1109 | /* 0x67 */ { NULL, NULL, 0 }, | |
1110 | /* 0x68 */ { NULL, NULL, 0 }, | |
1111 | /* 0x69 */ { NULL, NULL, 0 }, | |
1112 | /* 0x6a */ { NULL, NULL, 0 }, | |
1113 | /* 0x6b */ { NULL, NULL, 0 }, | |
1114 | /* 0x6c */ { NULL, NULL, 0 }, | |
1115 | /* 0x6d */ { NULL, NULL, 0 }, | |
1116 | /* 0x6e */ { NULL, NULL, 0 }, | |
1117 | /* 0x6f */ { NULL, NULL, 0 }, | |
1118 | /* 0x70 */ { "SMBtcon",reply_tcon,0}, | |
1119 | /* 0x71 */ { "SMBtdis",reply_tdis,DO_CHDIR}, | |
1120 | /* 0x72 */ { "SMBnegprot",reply_negprot,0}, | |
1121 | /* 0x73 */ { "SMBsesssetupX",reply_sesssetup_and_X,0}, | |
1122 | /* 0x74 */ { "SMBulogoffX",reply_ulogoffX, 0}, /* ulogoff doesn't give a valid TID */ | |
1123 | /* 0x75 */ { "SMBtconX",reply_tcon_and_X,0}, | |
1124 | /* 0x76 */ { NULL, NULL, 0 }, | |
1125 | /* 0x77 */ { NULL, NULL, 0 }, | |
1126 | /* 0x78 */ { NULL, NULL, 0 }, | |
1127 | /* 0x79 */ { NULL, NULL, 0 }, | |
1128 | /* 0x7a */ { NULL, NULL, 0 }, | |
1129 | /* 0x7b */ { NULL, NULL, 0 }, | |
1130 | /* 0x7c */ { NULL, NULL, 0 }, | |
1131 | /* 0x7d */ { NULL, NULL, 0 }, | |
1132 | /* 0x7e */ { NULL, NULL, 0 }, | |
1133 | /* 0x7f */ { NULL, NULL, 0 }, | |
1134 | /* 0x80 */ { "SMBdskattr",reply_dskattr,AS_USER}, | |
1135 | /* 0x81 */ { "SMBsearch",reply_search,AS_USER}, | |
1136 | /* 0x82 */ { "SMBffirst",reply_search,AS_USER}, | |
1137 | /* 0x83 */ { "SMBfunique",reply_search,AS_USER}, | |
1138 | /* 0x84 */ { "SMBfclose",reply_fclose,AS_USER}, | |
1139 | /* 0x85 */ { NULL, NULL, 0 }, | |
1140 | /* 0x86 */ { NULL, NULL, 0 }, | |
1141 | /* 0x87 */ { NULL, NULL, 0 }, | |
1142 | /* 0x88 */ { NULL, NULL, 0 }, | |
1143 | /* 0x89 */ { NULL, NULL, 0 }, | |
1144 | /* 0x8a */ { NULL, NULL, 0 }, | |
1145 | /* 0x8b */ { NULL, NULL, 0 }, | |
1146 | /* 0x8c */ { NULL, NULL, 0 }, | |
1147 | /* 0x8d */ { NULL, NULL, 0 }, | |
1148 | /* 0x8e */ { NULL, NULL, 0 }, | |
1149 | /* 0x8f */ { NULL, NULL, 0 }, | |
1150 | /* 0x90 */ { NULL, NULL, 0 }, | |
1151 | /* 0x91 */ { NULL, NULL, 0 }, | |
1152 | /* 0x92 */ { NULL, NULL, 0 }, | |
1153 | /* 0x93 */ { NULL, NULL, 0 }, | |
1154 | /* 0x94 */ { NULL, NULL, 0 }, | |
1155 | /* 0x95 */ { NULL, NULL, 0 }, | |
1156 | /* 0x96 */ { NULL, NULL, 0 }, | |
1157 | /* 0x97 */ { NULL, NULL, 0 }, | |
1158 | /* 0x98 */ { NULL, NULL, 0 }, | |
1159 | /* 0x99 */ { NULL, NULL, 0 }, | |
1160 | /* 0x9a */ { NULL, NULL, 0 }, | |
1161 | /* 0x9b */ { NULL, NULL, 0 }, | |
1162 | /* 0x9c */ { NULL, NULL, 0 }, | |
1163 | /* 0x9d */ { NULL, NULL, 0 }, | |
1164 | /* 0x9e */ { NULL, NULL, 0 }, | |
1165 | /* 0x9f */ { NULL, NULL, 0 }, | |
1166 | /* 0xa0 */ { "SMBnttrans",reply_nttrans, AS_USER | CAN_IPC }, | |
1167 | /* 0xa1 */ { "SMBnttranss",reply_nttranss, AS_USER | CAN_IPC }, | |
1168 | /* 0xa2 */ { "SMBntcreateX",reply_ntcreate_and_X, AS_USER | CAN_IPC }, | |
1169 | /* 0xa3 */ { NULL, NULL, 0 }, | |
1170 | /* 0xa4 */ { "SMBntcancel",reply_ntcancel, 0 }, | |
1171 | /* 0xa5 */ { "SMBntrename",reply_ntrename, AS_USER | NEED_WRITE }, | |
1172 | /* 0xa6 */ { NULL, NULL, 0 }, | |
1173 | /* 0xa7 */ { NULL, NULL, 0 }, | |
1174 | /* 0xa8 */ { NULL, NULL, 0 }, | |
1175 | /* 0xa9 */ { NULL, NULL, 0 }, | |
1176 | /* 0xaa */ { NULL, NULL, 0 }, | |
1177 | /* 0xab */ { NULL, NULL, 0 }, | |
1178 | /* 0xac */ { NULL, NULL, 0 }, | |
1179 | /* 0xad */ { NULL, NULL, 0 }, | |
1180 | /* 0xae */ { NULL, NULL, 0 }, | |
1181 | /* 0xaf */ { NULL, NULL, 0 }, | |
1182 | /* 0xb0 */ { NULL, NULL, 0 }, | |
1183 | /* 0xb1 */ { NULL, NULL, 0 }, | |
1184 | /* 0xb2 */ { NULL, NULL, 0 }, | |
1185 | /* 0xb3 */ { NULL, NULL, 0 }, | |
1186 | /* 0xb4 */ { NULL, NULL, 0 }, | |
1187 | /* 0xb5 */ { NULL, NULL, 0 }, | |
1188 | /* 0xb6 */ { NULL, NULL, 0 }, | |
1189 | /* 0xb7 */ { NULL, NULL, 0 }, | |
1190 | /* 0xb8 */ { NULL, NULL, 0 }, | |
1191 | /* 0xb9 */ { NULL, NULL, 0 }, | |
1192 | /* 0xba */ { NULL, NULL, 0 }, | |
1193 | /* 0xbb */ { NULL, NULL, 0 }, | |
1194 | /* 0xbc */ { NULL, NULL, 0 }, | |
1195 | /* 0xbd */ { NULL, NULL, 0 }, | |
1196 | /* 0xbe */ { NULL, NULL, 0 }, | |
1197 | /* 0xbf */ { NULL, NULL, 0 }, | |
1198 | /* 0xc0 */ { "SMBsplopen",reply_printopen,AS_USER}, | |
1199 | /* 0xc1 */ { "SMBsplwr",reply_printwrite,AS_USER}, | |
1200 | /* 0xc2 */ { "SMBsplclose",reply_printclose,AS_USER}, | |
1201 | /* 0xc3 */ { "SMBsplretq",reply_printqueue,AS_USER}, | |
1202 | /* 0xc4 */ { NULL, NULL, 0 }, | |
1203 | /* 0xc5 */ { NULL, NULL, 0 }, | |
1204 | /* 0xc6 */ { NULL, NULL, 0 }, | |
1205 | /* 0xc7 */ { NULL, NULL, 0 }, | |
1206 | /* 0xc8 */ { NULL, NULL, 0 }, | |
1207 | /* 0xc9 */ { NULL, NULL, 0 }, | |
1208 | /* 0xca */ { NULL, NULL, 0 }, | |
1209 | /* 0xcb */ { NULL, NULL, 0 }, | |
1210 | /* 0xcc */ { NULL, NULL, 0 }, | |
1211 | /* 0xcd */ { NULL, NULL, 0 }, | |
1212 | /* 0xce */ { NULL, NULL, 0 }, | |
1213 | /* 0xcf */ { NULL, NULL, 0 }, | |
1214 | /* 0xd0 */ { "SMBsends",reply_sends,AS_GUEST}, | |
1215 | /* 0xd1 */ { "SMBsendb", NULL,AS_GUEST}, | |
1216 | /* 0xd2 */ { "SMBfwdname", NULL,AS_GUEST}, | |
1217 | /* 0xd3 */ { "SMBcancelf", NULL,AS_GUEST}, | |
1218 | /* 0xd4 */ { "SMBgetmac", NULL,AS_GUEST}, | |
1219 | /* 0xd5 */ { "SMBsendstrt",reply_sendstrt,AS_GUEST}, | |
1220 | /* 0xd6 */ { "SMBsendend",reply_sendend,AS_GUEST}, | |
1221 | /* 0xd7 */ { "SMBsendtxt",reply_sendtxt,AS_GUEST}, | |
1222 | /* 0xd8 */ { NULL, NULL, 0 }, | |
1223 | /* 0xd9 */ { NULL, NULL, 0 }, | |
1224 | /* 0xda */ { NULL, NULL, 0 }, | |
1225 | /* 0xdb */ { NULL, NULL, 0 }, | |
1226 | /* 0xdc */ { NULL, NULL, 0 }, | |
1227 | /* 0xdd */ { NULL, NULL, 0 }, | |
1228 | /* 0xde */ { NULL, NULL, 0 }, | |
1229 | /* 0xdf */ { NULL, NULL, 0 }, | |
1230 | /* 0xe0 */ { NULL, NULL, 0 }, | |
1231 | /* 0xe1 */ { NULL, NULL, 0 }, | |
1232 | /* 0xe2 */ { NULL, NULL, 0 }, | |
1233 | /* 0xe3 */ { NULL, NULL, 0 }, | |
1234 | /* 0xe4 */ { NULL, NULL, 0 }, | |
1235 | /* 0xe5 */ { NULL, NULL, 0 }, | |
1236 | /* 0xe6 */ { NULL, NULL, 0 }, | |
1237 | /* 0xe7 */ { NULL, NULL, 0 }, | |
1238 | /* 0xe8 */ { NULL, NULL, 0 }, | |
1239 | /* 0xe9 */ { NULL, NULL, 0 }, | |
1240 | /* 0xea */ { NULL, NULL, 0 }, | |
1241 | /* 0xeb */ { NULL, NULL, 0 }, | |
1242 | /* 0xec */ { NULL, NULL, 0 }, | |
1243 | /* 0xed */ { NULL, NULL, 0 }, | |
1244 | /* 0xee */ { NULL, NULL, 0 }, | |
1245 | /* 0xef */ { NULL, NULL, 0 }, | |
1246 | /* 0xf0 */ { NULL, NULL, 0 }, | |
1247 | /* 0xf1 */ { NULL, NULL, 0 }, | |
1248 | /* 0xf2 */ { NULL, NULL, 0 }, | |
1249 | /* 0xf3 */ { NULL, NULL, 0 }, | |
1250 | /* 0xf4 */ { NULL, NULL, 0 }, | |
1251 | /* 0xf5 */ { NULL, NULL, 0 }, | |
1252 | /* 0xf6 */ { NULL, NULL, 0 }, | |
1253 | /* 0xf7 */ { NULL, NULL, 0 }, | |
1254 | /* 0xf8 */ { NULL, NULL, 0 }, | |
1255 | /* 0xf9 */ { NULL, NULL, 0 }, | |
1256 | /* 0xfa */ { NULL, NULL, 0 }, | |
1257 | /* 0xfb */ { NULL, NULL, 0 }, | |
1258 | /* 0xfc */ { NULL, NULL, 0 }, | |
1259 | /* 0xfd */ { NULL, NULL, 0 }, | |
1260 | /* 0xfe */ { NULL, NULL, 0 }, | |
1261 | /* 0xff */ { NULL, NULL, 0 } | |
918c3ebe JA |
1262 | |
1263 | }; | |
c3effa8b | 1264 | |
cc6a4101 VL |
1265 | /******************************************************************* |
1266 | allocate and initialize a reply packet | |
1267 | ********************************************************************/ | |
1268 | ||
ae0c6cff VL |
1269 | static bool create_outbuf(TALLOC_CTX *mem_ctx, struct smb_request *req, |
1270 | const char *inbuf, char **outbuf, uint8_t num_words, | |
1271 | uint32_t num_bytes) | |
cc6a4101 | 1272 | { |
2fb27fcb VL |
1273 | /* |
1274 | * Protect against integer wrap | |
1275 | */ | |
1276 | if ((num_bytes > 0xffffff) | |
1277 | || ((num_bytes + smb_size + num_words*2) > 0xffffff)) { | |
1278 | char *msg; | |
a4c0812a VL |
1279 | if (asprintf(&msg, "num_bytes too large: %u", |
1280 | (unsigned)num_bytes) == -1) { | |
4f41be35 | 1281 | msg = discard_const_p(char, "num_bytes too large"); |
a4c0812a | 1282 | } |
2fb27fcb VL |
1283 | smb_panic(msg); |
1284 | } | |
1285 | ||
3d151376 | 1286 | *outbuf = talloc_array(mem_ctx, char, |
5cd8a427 VL |
1287 | smb_size + num_words*2 + num_bytes); |
1288 | if (*outbuf == NULL) { | |
1289 | return false; | |
cc6a4101 VL |
1290 | } |
1291 | ||
ae0c6cff | 1292 | construct_reply_common(req, inbuf, *outbuf); |
5cd8a427 | 1293 | srv_set_message(*outbuf, num_words, num_bytes, false); |
cc6a4101 VL |
1294 | /* |
1295 | * Zero out the word area, the caller has to take care of the bcc area | |
1296 | * himself | |
1297 | */ | |
1298 | if (num_words != 0) { | |
5cd8a427 | 1299 | memset(*outbuf + smb_vwv0, 0, num_words*2); |
cc6a4101 VL |
1300 | } |
1301 | ||
5cd8a427 VL |
1302 | return true; |
1303 | } | |
1304 | ||
1305 | void reply_outbuf(struct smb_request *req, uint8 num_words, uint32 num_bytes) | |
1306 | { | |
1307 | char *outbuf; | |
4f41be35 | 1308 | if (!create_outbuf(req, req, (const char *)req->inbuf, &outbuf, num_words, |
5cd8a427 VL |
1309 | num_bytes)) { |
1310 | smb_panic("could not allocate output buffer\n"); | |
1311 | } | |
1312 | req->outbuf = (uint8_t *)outbuf; | |
cc6a4101 VL |
1313 | } |
1314 | ||
1315 | ||
712a30ed | 1316 | /******************************************************************* |
a834a73e GC |
1317 | Dump a packet to a file. |
1318 | ********************************************************************/ | |
1319 | ||
c99d2455 | 1320 | static void smb_dump(const char *name, int type, const char *data) |
712a30ed | 1321 | { |
c99d2455 | 1322 | size_t len; |
712a30ed | 1323 | int fd, i; |
d068bc64 JA |
1324 | char *fname = NULL; |
1325 | if (DEBUGLEVEL < 50) { | |
1326 | return; | |
1327 | } | |
712a30ed | 1328 | |
c99d2455 | 1329 | len = smb_len_tcp(data)+4; |
712a30ed | 1330 | for (i=1;i<100;i++) { |
86a80cf4 JA |
1331 | fname = talloc_asprintf(talloc_tos(), |
1332 | "/tmp/%s.%d.%s", | |
1333 | name, | |
1334 | i, | |
1335 | type ? "req" : "resp"); | |
1336 | if (fname == NULL) { | |
d068bc64 JA |
1337 | return; |
1338 | } | |
712a30ed LL |
1339 | fd = open(fname, O_WRONLY|O_CREAT|O_EXCL, 0644); |
1340 | if (fd != -1 || errno != EEXIST) break; | |
86a80cf4 | 1341 | TALLOC_FREE(fname); |
712a30ed LL |
1342 | } |
1343 | if (fd != -1) { | |
e400bfce JA |
1344 | ssize_t ret = write(fd, data, len); |
1345 | if (ret != len) | |
1346 | DEBUG(0,("smb_dump: problem: write returned %d\n", (int)ret )); | |
712a30ed | 1347 | close(fd); |
9c8d23e5 | 1348 | DEBUG(0,("created %s len %lu\n", fname, (unsigned long)len)); |
712a30ed | 1349 | } |
86a80cf4 | 1350 | TALLOC_FREE(fname); |
712a30ed LL |
1351 | } |
1352 | ||
c3effa8b | 1353 | /**************************************************************************** |
cc6a4101 VL |
1354 | Prepare everything for calling the actual request function, and potentially |
1355 | call the request function via the "new" interface. | |
1356 | ||
1357 | Return False if the "legacy" function needs to be called, everything is | |
1358 | prepared. | |
1359 | ||
1360 | Return True if we're done. | |
1361 | ||
1362 | I know this API sucks, but it is the one with the least code change I could | |
1363 | find. | |
c3effa8b | 1364 | ****************************************************************************/ |
a834a73e | 1365 | |
07386bb5 | 1366 | static connection_struct *switch_message(uint8 type, struct smb_request *req) |
c3effa8b | 1367 | { |
941db29a | 1368 | int flags; |
02d9ba6e | 1369 | uint64_t session_tag; |
9254bb4e | 1370 | connection_struct *conn = NULL; |
6b8db9b2 | 1371 | struct smbd_server_connection *sconn = req->sconn; |
e7700025 SM |
1372 | NTTIME now = timeval_to_nttime(&req->request_time); |
1373 | struct smbXsrv_session *session = NULL; | |
1374 | NTSTATUS status; | |
24f8e973 | 1375 | |
a834a73e | 1376 | errno = 0; |
0557c6cb | 1377 | |
48d3a1d2 | 1378 | if (smb_messages[type].fn == NULL) { |
a834a73e | 1379 | DEBUG(0,("Unknown message type %d!\n",type)); |
c99d2455 | 1380 | smb_dump("Unknown", 1, (const char *)req->inbuf); |
cc6a4101 | 1381 | reply_unknown_new(req, type); |
9254bb4e | 1382 | return NULL; |
941db29a | 1383 | } |
a834a73e | 1384 | |
941db29a | 1385 | flags = smb_messages[type].flags; |
a834a73e | 1386 | |
941db29a | 1387 | /* In share mode security we must ignore the vuid. */ |
d7bb9618 | 1388 | session_tag = req->vuid; |
9254bb4e | 1389 | conn = req->conn; |
918c3ebe | 1390 | |
8579dd4d | 1391 | DEBUG(3,("switch message %s (pid %d) conn 0x%lx\n", smb_fn_name(type), |
c0288e06 | 1392 | (int)getpid(), (unsigned long)conn)); |
941db29a | 1393 | |
c99d2455 | 1394 | smb_dump(smb_fn_name(type), 1, (const char *)req->inbuf); |
918c3ebe | 1395 | |
941db29a | 1396 | /* Ensure this value is replaced in the incoming packet. */ |
4f41be35 | 1397 | SSVAL(discard_const_p(uint8_t, req->inbuf),smb_uid,session_tag); |
918c3ebe | 1398 | |
941db29a VL |
1399 | /* |
1400 | * Ensure the correct username is in current_user_info. This is a | |
1401 | * really ugly bugfix for problems with multiple session_setup_and_X's | |
1402 | * being done and allowing %U and %G substitutions to work correctly. | |
1403 | * There is a reason this code is done here, don't move it unless you | |
8579dd4d VL |
1404 | * know what you're doing... :-). |
1405 | * JRA. | |
941db29a VL |
1406 | */ |
1407 | ||
e7700025 SM |
1408 | /* |
1409 | * lookup an existing session | |
1410 | * | |
1411 | * Note: for now we only check for NT_STATUS_NETWORK_SESSION_EXPIRED | |
1412 | * here, the main check is still in change_to_user() | |
1413 | */ | |
1414 | status = smb1srv_session_lookup(sconn->conn, | |
1415 | session_tag, | |
1416 | now, | |
1417 | &session); | |
1418 | if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED)) { | |
1419 | switch (type) { | |
1420 | case SMBsesssetupX: | |
1421 | status = NT_STATUS_OK; | |
1422 | break; | |
1423 | default: | |
1424 | DEBUG(1,("Error: session %llu is expired, mid=%llu.\n", | |
1425 | (unsigned long long)session_tag, | |
1426 | (unsigned long long)req->mid)); | |
1427 | reply_nterror(req, NT_STATUS_NETWORK_SESSION_EXPIRED); | |
1428 | return conn; | |
1429 | } | |
1430 | } | |
1431 | ||
356f0336 | 1432 | if (session_tag != sconn->smb1.sessions.last_session_tag) { |
f52e5738 | 1433 | struct user_struct *vuser = NULL; |
941db29a | 1434 | |
356f0336 | 1435 | sconn->smb1.sessions.last_session_tag = session_tag; |
e7700025 SM |
1436 | if (session) { |
1437 | vuser = session->compat; | |
1438 | } | |
1439 | if (vuser) { | |
1440 | set_current_user_info( | |
1441 | vuser->session_info->unix_info->sanitized_username, | |
1442 | vuser->session_info->unix_info->unix_name, | |
1443 | vuser->session_info->info->domain_name); | |
a59149b8 | 1444 | } |
941db29a | 1445 | } |
d57e67f9 | 1446 | |
941db29a VL |
1447 | /* Does this call need to be run as the connected user? */ |
1448 | if (flags & AS_USER) { | |
fcda2645 | 1449 | |
941db29a VL |
1450 | /* Does this call need a valid tree connection? */ |
1451 | if (!conn) { | |
8579dd4d VL |
1452 | /* |
1453 | * Amazingly, the error code depends on the command | |
1454 | * (from Samba4). | |
1455 | */ | |
941db29a | 1456 | if (type == SMBntcreateX) { |
cc6a4101 | 1457 | reply_nterror(req, NT_STATUS_INVALID_HANDLE); |
941db29a | 1458 | } else { |
642101ac | 1459 | reply_nterror(req, NT_STATUS_NETWORK_NAME_DELETED); |
ce61fb21 | 1460 | } |
9254bb4e | 1461 | return NULL; |
941db29a | 1462 | } |
d57e67f9 | 1463 | |
941db29a | 1464 | if (!change_to_user(conn,session_tag)) { |
5e9aade5 | 1465 | DEBUG(0, ("Error: Could not change to user. Removing " |
79842437 JA |
1466 | "deferred open, mid=%llu.\n", |
1467 | (unsigned long long)req->mid)); | |
74deee3c | 1468 | reply_force_doserror(req, ERRSRV, ERRbaduid); |
9254bb4e | 1469 | return conn; |
941db29a | 1470 | } |
c3effa8b | 1471 | |
941db29a | 1472 | /* All NEED_WRITE and CAN_IPC flags must also have AS_USER. */ |
918c3ebe | 1473 | |
941db29a VL |
1474 | /* Does it need write permission? */ |
1475 | if ((flags & NEED_WRITE) && !CAN_WRITE(conn)) { | |
cc6a4101 | 1476 | reply_nterror(req, NT_STATUS_MEDIA_WRITE_PROTECTED); |
9254bb4e | 1477 | return conn; |
ce61fb21 | 1478 | } |
918c3ebe | 1479 | |
941db29a VL |
1480 | /* IPC services are limited */ |
1481 | if (IS_IPC(conn) && !(flags & CAN_IPC)) { | |
642101ac | 1482 | reply_nterror(req, NT_STATUS_ACCESS_DENIED); |
9254bb4e | 1483 | return conn; |
f60ad8de | 1484 | } |
941db29a VL |
1485 | } else { |
1486 | /* This call needs to be run as root */ | |
1487 | change_to_root_user(); | |
1488 | } | |
918c3ebe | 1489 | |
941db29a VL |
1490 | /* load service specific parameters */ |
1491 | if (conn) { | |
9254bb4e JA |
1492 | if (req->encrypted) { |
1493 | conn->encrypted_tid = true; | |
1494 | /* encrypted required from now on. */ | |
e5d4e8df | 1495 | conn->encrypt_level = SMB_SIGNING_REQUIRED; |
9254bb4e | 1496 | } else if (ENCRYPTION_REQUIRED(conn)) { |
7808a259 | 1497 | if (req->cmd != SMBtrans2 && req->cmd != SMBtranss2) { |
9f1dfd8f SM |
1498 | DEBUG(1,("service[%s] requires encryption" |
1499 | "%s ACCESS_DENIED. mid=%llu\n", | |
1500 | lp_servicename(talloc_tos(), SNUM(conn)), | |
1501 | smb_fn_name(type), | |
1502 | (unsigned long long)req->mid)); | |
1503 | reply_nterror(req, NT_STATUS_ACCESS_DENIED); | |
9254bb4e JA |
1504 | return conn; |
1505 | } | |
1506 | } | |
1507 | ||
cc6a4101 | 1508 | if (!set_current_service(conn,SVAL(req->inbuf,smb_flg), |
8579dd4d VL |
1509 | (flags & (AS_USER|DO_CHDIR) |
1510 | ?True:False))) { | |
642101ac | 1511 | reply_nterror(req, NT_STATUS_ACCESS_DENIED); |
9254bb4e | 1512 | return conn; |
afce2b24 | 1513 | } |
941db29a VL |
1514 | conn->num_smb_operations++; |
1515 | } | |
918c3ebe | 1516 | |
1f62df52 VL |
1517 | /* |
1518 | * Does this protocol need to be run as guest? (Only archane | |
1519 | * messenger service requests have this...) | |
1520 | */ | |
1521 | if (flags & AS_GUEST) { | |
1522 | char *raddr; | |
1523 | bool ok; | |
a513086c | 1524 | |
1f62df52 VL |
1525 | if (!change_to_guest()) { |
1526 | reply_nterror(req, NT_STATUS_ACCESS_DENIED); | |
1527 | return conn; | |
1528 | } | |
1529 | ||
1530 | raddr = tsocket_address_inet_addr_string(sconn->remote_address, | |
1531 | talloc_tos()); | |
1532 | if (raddr == NULL) { | |
1533 | reply_nterror(req, NT_STATUS_NO_MEMORY); | |
1534 | return conn; | |
1535 | } | |
1536 | ||
1537 | /* | |
1538 | * Haven't we checked this in smbd_process already??? | |
1539 | */ | |
1540 | ||
1541 | ok = allow_access(lp_hostsdeny(-1), lp_hostsallow(-1), | |
1542 | sconn->remote_hostname, raddr); | |
1543 | TALLOC_FREE(raddr); | |
1544 | ||
1545 | if (!ok) { | |
1546 | reply_nterror(req, NT_STATUS_ACCESS_DENIED); | |
1547 | return conn; | |
1548 | } | |
cc6a4101 VL |
1549 | } |
1550 | ||
48d3a1d2 | 1551 | smb_messages[type].fn(req); |
9254bb4e | 1552 | return req->conn; |
e9ea36e4 AT |
1553 | } |
1554 | ||
e9ea36e4 | 1555 | /**************************************************************************** |
a834a73e | 1556 | Construct a reply to the incoming packet. |
e9ea36e4 | 1557 | ****************************************************************************/ |
a834a73e | 1558 | |
c2533f94 VL |
1559 | static void construct_reply(struct smbd_server_connection *sconn, |
1560 | char *inbuf, int size, size_t unread_bytes, | |
c16c90a1 | 1561 | uint32_t seqnum, bool encrypted, |
54c51a66 | 1562 | struct smb_perfcount_data *deferred_pcd) |
e9ea36e4 | 1563 | { |
9254bb4e | 1564 | connection_struct *conn; |
cc6a4101 | 1565 | struct smb_request *req; |
e9ea36e4 | 1566 | |
929e1d99 | 1567 | if (!(req = talloc(talloc_tos(), struct smb_request))) { |
cc6a4101 VL |
1568 | smb_panic("could not allocate smb_request"); |
1569 | } | |
54c51a66 | 1570 | |
c2533f94 VL |
1571 | if (!init_smb_request(req, sconn, (uint8 *)inbuf, unread_bytes, |
1572 | encrypted, seqnum)) { | |
b7898148 VL |
1573 | exit_server_cleanly("Invalid SMB request"); |
1574 | } | |
1575 | ||
b8125663 | 1576 | req->inbuf = (uint8_t *)talloc_move(req, &inbuf); |
e9ea36e4 | 1577 | |
54c51a66 | 1578 | /* we popped this message off the queue - keep original perf data */ |
1579 | if (deferred_pcd) | |
1580 | req->pcd = *deferred_pcd; | |
1581 | else { | |
1582 | SMB_PERFCOUNT_START(&req->pcd); | |
1583 | SMB_PERFCOUNT_SET_OP(&req->pcd, req->cmd); | |
1584 | SMB_PERFCOUNT_SET_MSGLEN_IN(&req->pcd, size); | |
1585 | } | |
1586 | ||
07386bb5 | 1587 | conn = switch_message(req->cmd, req); |
e9ea36e4 | 1588 | |
b578db69 VL |
1589 | if (req->outbuf == NULL) { |
1590 | return; | |
cc6a4101 | 1591 | } |
e9ea36e4 | 1592 | |
b578db69 VL |
1593 | if (CVAL(req->outbuf,0) == 0) { |
1594 | show_msg((char *)req->outbuf); | |
1595 | } | |
e9ea36e4 | 1596 | |
1808dd0a | 1597 | if (!srv_send_smb(req->sconn, |
9254bb4e | 1598 | (char *)req->outbuf, |
c16c90a1 | 1599 | true, req->seqnum+1, |
54c51a66 | 1600 | IS_CONN_ENCRYPTED(conn)||req->encrypted, |
1601 | &req->pcd)) { | |
9254bb4e | 1602 | exit_server_cleanly("construct_reply: srv_send_smb failed."); |
dc90cd89 | 1603 | } |
cc6a4101 VL |
1604 | |
1605 | TALLOC_FREE(req); | |
1606 | ||
1607 | return; | |
e9ea36e4 AT |
1608 | } |
1609 | ||
3b2c9beb VL |
1610 | static void construct_reply_chain(struct smbd_server_connection *sconn, |
1611 | char *inbuf, int size, uint32_t seqnum, | |
1612 | bool encrypted, | |
1613 | struct smb_perfcount_data *deferred_pcd) | |
1614 | { | |
3b2c9beb | 1615 | struct smb_request **reqs = NULL; |
8f93068c VL |
1616 | struct smb_request *req; |
1617 | unsigned num_reqs; | |
3b2c9beb VL |
1618 | bool ok; |
1619 | ||
1620 | ok = smb1_parse_chain(talloc_tos(), (uint8_t *)inbuf, sconn, encrypted, | |
1621 | seqnum, &reqs, &num_reqs); | |
1622 | if (!ok) { | |
8f93068c VL |
1623 | char errbuf[smb_size]; |
1624 | error_packet(errbuf, 0, 0, NT_STATUS_INVALID_PARAMETER, | |
1625 | __LINE__, __FILE__); | |
1626 | if (!srv_send_smb(sconn, errbuf, true, seqnum, encrypted, | |
1627 | NULL)) { | |
1628 | exit_server_cleanly("construct_reply_chain: " | |
1629 | "srv_send_smb failed."); | |
1630 | } | |
1631 | return; | |
3b2c9beb VL |
1632 | } |
1633 | ||
8f93068c VL |
1634 | req = reqs[0]; |
1635 | req->inbuf = (uint8_t *)talloc_move(reqs, &inbuf); | |
3b2c9beb | 1636 | |
8f93068c | 1637 | req->conn = switch_message(req->cmd, req); |
3b2c9beb | 1638 | |
8f93068c VL |
1639 | if (req->outbuf == NULL) { |
1640 | /* | |
1641 | * Request has suspended itself, will come | |
1642 | * back here. | |
1643 | */ | |
1644 | return; | |
1645 | } | |
1646 | smb_request_done(req); | |
1647 | } | |
3b2c9beb | 1648 | |
8f93068c VL |
1649 | /* |
1650 | * To be called from an async SMB handler that is potentially chained | |
1651 | * when it is finished for shipping. | |
1652 | */ | |
1653 | ||
1654 | void smb_request_done(struct smb_request *req) | |
1655 | { | |
1656 | struct smb_request **reqs = NULL; | |
1657 | struct smb_request *first_req; | |
1658 | size_t i, num_reqs, next_index; | |
1659 | NTSTATUS status; | |
1660 | ||
1661 | if (req->chain == NULL) { | |
1662 | first_req = req; | |
1663 | goto shipit; | |
3b2c9beb VL |
1664 | } |
1665 | ||
8f93068c VL |
1666 | reqs = req->chain; |
1667 | num_reqs = talloc_array_length(reqs); | |
3b2c9beb | 1668 | |
8f93068c VL |
1669 | for (i=0; i<num_reqs; i++) { |
1670 | if (reqs[i] == req) { | |
1671 | break; | |
1672 | } | |
1673 | } | |
1674 | if (i == num_reqs) { | |
3b2c9beb | 1675 | /* |
8f93068c | 1676 | * Invalid chain, should not happen |
3b2c9beb | 1677 | */ |
8f93068c VL |
1678 | status = NT_STATUS_INTERNAL_ERROR; |
1679 | goto error; | |
1680 | } | |
1681 | next_index = i+1; | |
1682 | ||
1683 | while ((next_index < num_reqs) && (IVAL(req->outbuf, smb_rcls) == 0)) { | |
1684 | struct smb_request *next = reqs[next_index]; | |
faa8edcc SM |
1685 | struct smbXsrv_tcon *tcon; |
1686 | NTTIME now = timeval_to_nttime(&req->request_time); | |
8f93068c VL |
1687 | |
1688 | next->vuid = SVAL(req->outbuf, smb_uid); | |
1689 | next->tid = SVAL(req->outbuf, smb_tid); | |
faa8edcc SM |
1690 | status = smb1srv_tcon_lookup(req->sconn->conn, req->tid, |
1691 | now, &tcon); | |
1692 | if (NT_STATUS_IS_OK(status)) { | |
1693 | req->conn = tcon->compat; | |
1694 | } else { | |
1695 | req->conn = NULL; | |
1696 | } | |
8f93068c VL |
1697 | next->chain_fsp = req->chain_fsp; |
1698 | next->inbuf = (uint8_t *)req->inbuf; | |
1699 | ||
1700 | req = next; | |
1701 | req->conn = switch_message(req->cmd, req); | |
1702 | ||
1703 | if (req->outbuf == NULL) { | |
1704 | /* | |
1705 | * Request has suspended itself, will come | |
1706 | * back here. | |
1707 | */ | |
1708 | return; | |
1709 | } | |
1710 | next_index += 1; | |
3b2c9beb VL |
1711 | } |
1712 | ||
8f93068c VL |
1713 | first_req = reqs[0]; |
1714 | ||
3b2c9beb | 1715 | for (i=1; i<next_index; i++) { |
8f93068c | 1716 | bool ok; |
3b2c9beb | 1717 | |
8f93068c | 1718 | ok = smb_splice_chain(&first_req->outbuf, reqs[i]->outbuf); |
3b2c9beb VL |
1719 | if (!ok) { |
1720 | status = NT_STATUS_INTERNAL_ERROR; | |
1721 | goto error; | |
1722 | } | |
3b2c9beb VL |
1723 | } |
1724 | ||
8f93068c VL |
1725 | SSVAL(first_req->outbuf, smb_uid, SVAL(req->outbuf, smb_uid)); |
1726 | SSVAL(first_req->outbuf, smb_tid, SVAL(req->outbuf, smb_tid)); | |
3b2c9beb VL |
1727 | |
1728 | /* | |
1729 | * This scary statement intends to set the | |
1730 | * FLAGS2_32_BIT_ERROR_CODES flg2 field in first_req->outbuf | |
1731 | * to the value last_req->outbuf carries | |
1732 | */ | |
1733 | SSVAL(first_req->outbuf, smb_flg2, | |
1734 | (SVAL(first_req->outbuf, smb_flg2) & ~FLAGS2_32_BIT_ERROR_CODES) | |
8f93068c | 1735 | |(SVAL(req->outbuf, smb_flg2) & FLAGS2_32_BIT_ERROR_CODES)); |
3b2c9beb VL |
1736 | |
1737 | /* | |
1738 | * Transfer the error codes from the subrequest to the main one | |
1739 | */ | |
8f93068c VL |
1740 | SSVAL(first_req->outbuf, smb_rcls, SVAL(req->outbuf, smb_rcls)); |
1741 | SSVAL(first_req->outbuf, smb_err, SVAL(req->outbuf, smb_err)); | |
3b2c9beb | 1742 | |
8f93068c VL |
1743 | _smb_setlen_large( |
1744 | first_req->outbuf, talloc_get_size(first_req->outbuf) - 4); | |
3b2c9beb VL |
1745 | |
1746 | shipit: | |
3b2c9beb VL |
1747 | if (!srv_send_smb(first_req->sconn, |
1748 | (char *)first_req->outbuf, | |
1749 | true, first_req->seqnum+1, | |
8f93068c | 1750 | IS_CONN_ENCRYPTED(req->conn)||first_req->encrypted, |
3b2c9beb VL |
1751 | &first_req->pcd)) { |
1752 | exit_server_cleanly("construct_reply_chain: srv_send_smb " | |
1753 | "failed."); | |
1754 | } | |
8f93068c VL |
1755 | TALLOC_FREE(req); /* non-chained case */ |
1756 | TALLOC_FREE(reqs); /* chained case */ | |
3b2c9beb VL |
1757 | return; |
1758 | ||
1759 | error: | |
1760 | { | |
1761 | char errbuf[smb_size]; | |
1762 | error_packet(errbuf, 0, 0, status, __LINE__, __FILE__); | |
8f93068c VL |
1763 | if (!srv_send_smb(req->sconn, errbuf, true, |
1764 | req->seqnum+1, req->encrypted, | |
3b2c9beb VL |
1765 | NULL)) { |
1766 | exit_server_cleanly("construct_reply_chain: " | |
1767 | "srv_send_smb failed."); | |
1768 | } | |
1769 | } | |
8f93068c VL |
1770 | TALLOC_FREE(req); /* non-chained case */ |
1771 | TALLOC_FREE(reqs); /* chained case */ | |
3b2c9beb VL |
1772 | } |
1773 | ||
e9ea36e4 | 1774 | /**************************************************************************** |
49ecd176 | 1775 | Process an smb from the client |
e9ea36e4 | 1776 | ****************************************************************************/ |
81bdb591 | 1777 | static void process_smb(struct smbd_server_connection *sconn, |
aeb798c3 | 1778 | uint8_t *inbuf, size_t nread, size_t unread_bytes, |
c16c90a1 SM |
1779 | uint32_t seqnum, bool encrypted, |
1780 | struct smb_perfcount_data *deferred_pcd) | |
e9ea36e4 | 1781 | { |
1eff0523 | 1782 | int msg_type = CVAL(inbuf,0); |
1eff0523 JA |
1783 | |
1784 | DO_PROFILE_INC(smb_count); | |
1785 | ||
cc6a4101 VL |
1786 | DEBUG( 6, ( "got message type 0x%x of len 0x%x\n", msg_type, |
1787 | smb_len(inbuf) ) ); | |
2d81721a | 1788 | DEBUG(3, ("Transaction %d of length %d (%u toread)\n", |
81bdb591 | 1789 | sconn->trans_num, (int)nread, (unsigned int)unread_bytes)); |
1eff0523 | 1790 | |
0633c0f6 | 1791 | if (msg_type != NBSSmessage) { |
cc6a4101 VL |
1792 | /* |
1793 | * NetBIOS session request, keepalive, etc. | |
1794 | */ | |
81bdb591 | 1795 | reply_special(sconn, (char *)inbuf, nread); |
aeb798c3 | 1796 | goto done; |
cc6a4101 | 1797 | } |
1eff0523 | 1798 | |
81bdb591 | 1799 | if (sconn->using_smb2) { |
d28fa8fa JA |
1800 | /* At this point we're not really using smb2, |
1801 | * we make the decision here.. */ | |
688945a9 | 1802 | if (smbd_is_smb2_header(inbuf, nread)) { |
cac60a70 | 1803 | smbd_smb2_first_negprot(sconn, inbuf, nread); |
688945a9 | 1804 | return; |
b4b9918c | 1805 | } else if (nread >= smb_size && valid_smb_header(sconn, inbuf) |
c9a3661c JA |
1806 | && CVAL(inbuf, smb_com) != 0x72) { |
1807 | /* This is a non-negprot SMB1 packet. | |
1808 | Disable SMB2 from now on. */ | |
cac60a70 | 1809 | sconn->using_smb2 = false; |
688945a9 | 1810 | } |
688945a9 SM |
1811 | } |
1812 | ||
fed2fba0 VL |
1813 | /* Make sure this is an SMB packet. smb_size contains NetBIOS header |
1814 | * so subtract 4 from it. */ | |
1815 | if ((nread < (smb_size - 4)) || !valid_smb_header(sconn, inbuf)) { | |
1816 | DEBUG(2,("Non-SMB packet of length %d. Terminating server\n", | |
1817 | smb_len(inbuf))); | |
1818 | ||
1819 | /* special magic for immediate exit */ | |
1820 | if ((nread == 9) && | |
1821 | (IVAL(inbuf, 4) == 0x74697865) && | |
1822 | lp_parm_bool(-1, "smbd", "suicide mode", false)) { | |
1823 | uint8_t exitcode = CVAL(inbuf, 8); | |
1824 | DEBUG(1, ("Exiting immediately with code %d\n", | |
1825 | (int)exitcode)); | |
1826 | exit(exitcode); | |
1827 | } | |
1828 | ||
1829 | exit_server_cleanly("Non-SMB packet"); | |
1830 | } | |
1831 | ||
aeb798c3 | 1832 | show_msg((char *)inbuf); |
cc6a4101 | 1833 | |
3b2c9beb VL |
1834 | if ((unread_bytes == 0) && smb1_is_chain(inbuf)) { |
1835 | construct_reply_chain(sconn, (char *)inbuf, nread, | |
1836 | seqnum, encrypted, deferred_pcd); | |
1837 | } else { | |
1838 | construct_reply(sconn, (char *)inbuf, nread, unread_bytes, | |
1839 | seqnum, encrypted, deferred_pcd); | |
1840 | } | |
1841 | ||
81bdb591 | 1842 | sconn->trans_num++; |
aeb798c3 SM |
1843 | |
1844 | done: | |
8dc70295 | 1845 | sconn->num_requests++; |
aeb798c3 SM |
1846 | |
1847 | /* The timeout_processing function isn't run nearly | |
1848 | often enough to implement 'max log size' without | |
1849 | overrunning the size of the file by many megabytes. | |
1850 | This is especially true if we are running at debug | |
1851 | level 10. Checking every 50 SMBs is a nice | |
1852 | tradeoff of performance vs log file size overrun. */ | |
1853 | ||
8dc70295 | 1854 | if ((sconn->num_requests % 50) == 0 && |
aeb798c3 SM |
1855 | need_to_check_log_size()) { |
1856 | change_to_root_user(); | |
1857 | check_log_size(); | |
1858 | } | |
e9ea36e4 AT |
1859 | } |
1860 | ||
e9ea36e4 | 1861 | /**************************************************************************** |
1eff0523 | 1862 | Return a string containing the function name of a SMB command. |
e9ea36e4 | 1863 | ****************************************************************************/ |
1eff0523 | 1864 | |
127e77e6 | 1865 | const char *smb_fn_name(int type) |
e9ea36e4 | 1866 | { |
634c5431 | 1867 | const char *unknown_name = "SMBunknown"; |
e9ea36e4 | 1868 | |
918c3ebe | 1869 | if (smb_messages[type].name == NULL) |
e9ea36e4 AT |
1870 | return(unknown_name); |
1871 | ||
918c3ebe | 1872 | return(smb_messages[type].name); |
c3effa8b AT |
1873 | } |
1874 | ||
dc76502c | 1875 | /**************************************************************************** |
6bb8f54e | 1876 | Helper functions for contruct_reply. |
dc76502c JA |
1877 | ****************************************************************************/ |
1878 | ||
6219c997 JA |
1879 | void add_to_common_flags2(uint32 v) |
1880 | { | |
1881 | common_flags2 |= v; | |
1882 | } | |
6bb8f54e | 1883 | |
27891bde | 1884 | void remove_from_common_flags2(uint32 v) |
6bb8f54e | 1885 | { |
27891bde | 1886 | common_flags2 &= ~v; |
6bb8f54e JA |
1887 | } |
1888 | ||
ae0c6cff VL |
1889 | static void construct_reply_common(struct smb_request *req, const char *inbuf, |
1890 | char *outbuf) | |
dc76502c | 1891 | { |
f205e4ca SM |
1892 | uint16_t in_flags2 = SVAL(inbuf,smb_flg2); |
1893 | uint16_t out_flags2 = common_flags2; | |
1894 | ||
1895 | out_flags2 |= in_flags2 & FLAGS2_UNICODE_STRINGS; | |
1896 | out_flags2 |= in_flags2 & FLAGS2_SMB_SECURITY_SIGNATURES; | |
1897 | out_flags2 |= in_flags2 & FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED; | |
1898 | ||
9254bb4e | 1899 | srv_set_message(outbuf,0,0,false); |
8905b599 | 1900 | |
ae0c6cff | 1901 | SCVAL(outbuf, smb_com, req->cmd); |
fc13f284 | 1902 | SIVAL(outbuf,smb_rcls,0); |
b7280423 | 1903 | SCVAL(outbuf,smb_flg, FLAG_REPLY | (CVAL(inbuf,smb_flg) & FLAG_CASELESS_PATHNAMES)); |
f205e4ca | 1904 | SSVAL(outbuf,smb_flg2, out_flags2); |
fc13f284 | 1905 | memset(outbuf+smb_pidhigh,'\0',(smb_tid-smb_pidhigh)); |
f205e4ca | 1906 | memcpy(outbuf+smb_ss_field, inbuf+smb_ss_field, 8); |
b7280423 | 1907 | |
b7280423 AT |
1908 | SSVAL(outbuf,smb_tid,SVAL(inbuf,smb_tid)); |
1909 | SSVAL(outbuf,smb_pid,SVAL(inbuf,smb_pid)); | |
1910 | SSVAL(outbuf,smb_uid,SVAL(inbuf,smb_uid)); | |
1911 | SSVAL(outbuf,smb_mid,SVAL(inbuf,smb_mid)); | |
dc76502c | 1912 | } |
c3effa8b | 1913 | |
e4897a53 VL |
1914 | void construct_reply_common_req(struct smb_request *req, char *outbuf) |
1915 | { | |
4f41be35 | 1916 | construct_reply_common(req, (const char *)req->inbuf, outbuf); |
e4897a53 VL |
1917 | } |
1918 | ||
b6f446ca VL |
1919 | /** |
1920 | * @brief Find the smb_cmd offset of the last command pushed | |
1921 | * @param[in] buf The buffer we're building up | |
1922 | * @retval Where can we put our next andx cmd? | |
1923 | * | |
1924 | * While chaining requests, the "next" request we're looking at needs to put | |
1925 | * its SMB_Command before the data the previous request already built up added | |
1926 | * to the chain. Find the offset to the place where we have to put our cmd. | |
1927 | */ | |
1928 | ||
1929 | static bool find_andx_cmd_ofs(uint8_t *buf, size_t *pofs) | |
1930 | { | |
1931 | uint8_t cmd; | |
1932 | size_t ofs; | |
1933 | ||
1934 | cmd = CVAL(buf, smb_com); | |
1935 | ||
947a8bc4 VL |
1936 | if (!is_andx_req(cmd)) { |
1937 | return false; | |
1938 | } | |
b6f446ca VL |
1939 | |
1940 | ofs = smb_vwv0; | |
1941 | ||
1942 | while (CVAL(buf, ofs) != 0xff) { | |
1943 | ||
1944 | if (!is_andx_req(CVAL(buf, ofs))) { | |
1945 | return false; | |
1946 | } | |
1947 | ||
1948 | /* | |
1949 | * ofs is from start of smb header, so add the 4 length | |
1950 | * bytes. The next cmd is right after the wct field. | |
1951 | */ | |
1952 | ofs = SVAL(buf, ofs+2) + 4 + 1; | |
1953 | ||
947a8bc4 VL |
1954 | if (ofs+4 >= talloc_get_size(buf)) { |
1955 | return false; | |
1956 | } | |
b6f446ca VL |
1957 | } |
1958 | ||
1959 | *pofs = ofs; | |
1960 | return true; | |
1961 | } | |
1962 | ||
1963 | /** | |
1964 | * @brief Do the smb chaining at a buffer level | |
1965 | * @param[in] poutbuf Pointer to the talloc'ed buffer to be modified | |
da322e4f | 1966 | * @param[in] andx_buf Buffer to be appended |
b6f446ca VL |
1967 | */ |
1968 | ||
da322e4f | 1969 | static bool smb_splice_chain(uint8_t **poutbuf, const uint8_t *andx_buf) |
b6f446ca | 1970 | { |
da322e4f VL |
1971 | uint8_t smb_command = CVAL(andx_buf, smb_com); |
1972 | uint8_t wct = CVAL(andx_buf, smb_wct); | |
1973 | const uint16_t *vwv = (const uint16_t *)(andx_buf + smb_vwv); | |
da322e4f | 1974 | uint32_t num_bytes = smb_buflen(andx_buf); |
adac8858 | 1975 | const uint8_t *bytes = (const uint8_t *)smb_buf_const(andx_buf); |
da322e4f | 1976 | |
b6f446ca VL |
1977 | uint8_t *outbuf; |
1978 | size_t old_size, new_size; | |
1979 | size_t ofs; | |
1980 | size_t chain_padding = 0; | |
61953ab3 VL |
1981 | size_t andx_cmd_ofs; |
1982 | ||
b6f446ca VL |
1983 | |
1984 | old_size = talloc_get_size(*poutbuf); | |
1985 | ||
b07ae1ab | 1986 | if ((old_size % 4) != 0) { |
b6f446ca VL |
1987 | /* |
1988 | * Align the wct field of subsequent requests to a 4-byte | |
1989 | * boundary | |
1990 | */ | |
1991 | chain_padding = 4 - (old_size % 4); | |
1992 | } | |
1993 | ||
1994 | /* | |
1995 | * After the old request comes the new wct field (1 byte), the vwv's | |
5b7609db | 1996 | * and the num_bytes field. |
b6f446ca VL |
1997 | */ |
1998 | ||
1999 | new_size = old_size + chain_padding + 1 + wct * sizeof(uint16_t) + 2; | |
4708b97c | 2000 | new_size += num_bytes; |
b6f446ca VL |
2001 | |
2002 | if ((smb_command != SMBwriteX) && (new_size > 0xffff)) { | |
28901acd | 2003 | DEBUG(1, ("smb_splice_chain: %u bytes won't fit\n", |
b6f446ca VL |
2004 | (unsigned)new_size)); |
2005 | return false; | |
2006 | } | |
2007 | ||
73b37743 | 2008 | outbuf = talloc_realloc(NULL, *poutbuf, uint8_t, new_size); |
b6f446ca VL |
2009 | if (outbuf == NULL) { |
2010 | DEBUG(0, ("talloc failed\n")); | |
2011 | return false; | |
2012 | } | |
2013 | *poutbuf = outbuf; | |
2014 | ||
61953ab3 VL |
2015 | if (!find_andx_cmd_ofs(outbuf, &andx_cmd_ofs)) { |
2016 | DEBUG(1, ("invalid command chain\n")); | |
2017 | *poutbuf = talloc_realloc(NULL, *poutbuf, uint8_t, old_size); | |
2018 | return false; | |
2019 | } | |
b6f446ca | 2020 | |
61953ab3 VL |
2021 | if (chain_padding != 0) { |
2022 | memset(outbuf + old_size, 0, chain_padding); | |
2023 | old_size += chain_padding; | |
b6f446ca VL |
2024 | } |
2025 | ||
61953ab3 VL |
2026 | SCVAL(outbuf, andx_cmd_ofs, smb_command); |
2027 | SSVAL(outbuf, andx_cmd_ofs + 2, old_size - 4); | |
2028 | ||
b6f446ca VL |
2029 | ofs = old_size; |
2030 | ||
2031 | /* | |
2032 | * Push the chained request: | |
2033 | * | |
2034 | * wct field | |
2035 | */ | |
2036 | ||
2037 | SCVAL(outbuf, ofs, wct); | |
2038 | ofs += 1; | |
2039 | ||
2040 | /* | |
2041 | * vwv array | |
2042 | */ | |
2043 | ||
2044 | memcpy(outbuf + ofs, vwv, sizeof(uint16_t) * wct); | |
12068d4a VL |
2045 | |
2046 | /* | |
2047 | * HACK ALERT | |
2048 | * | |
2049 | * Read&X has an offset into its data buffer at | |
2050 | * vwv[6]. reply_read_andx has no idea anymore that it's | |
2051 | * running from within a chain, so we have to fix up the | |
2052 | * offset here. | |
2053 | * | |
2054 | * Although it looks disgusting at this place, I want to keep | |
2055 | * it here. The alternative would be to push knowledge about | |
2056 | * the andx chain down into read&x again. | |
2057 | */ | |
2058 | ||
2059 | if (smb_command == SMBreadX) { | |
2060 | uint8_t *bytes_addr; | |
2061 | ||
2062 | if (wct < 7) { | |
2063 | /* | |
2064 | * Invalid read&x response | |
2065 | */ | |
2066 | return false; | |
2067 | } | |
2068 | ||
2069 | bytes_addr = outbuf + ofs /* vwv start */ | |
2070 | + sizeof(uint16_t) * wct /* vwv array */ | |
2071 | + sizeof(uint16_t); /* bcc */ | |
2072 | ||
2073 | SSVAL(outbuf + ofs, 6 * sizeof(uint16_t), | |
2074 | bytes_addr - outbuf - 4); | |
2075 | } | |
2076 | ||
b6f446ca VL |
2077 | ofs += sizeof(uint16_t) * wct; |
2078 | ||
2079 | /* | |
2080 | * bcc (byte count) | |
2081 | */ | |
2082 | ||
4708b97c | 2083 | SSVAL(outbuf, ofs, num_bytes); |
b6f446ca VL |
2084 | ofs += sizeof(uint16_t); |
2085 | ||
b6f446ca VL |
2086 | /* |
2087 | * The bytes field | |
2088 | */ | |
2089 | ||
2090 | memcpy(outbuf + ofs, bytes, num_bytes); | |
2091 | ||
2092 | return true; | |
2093 | } | |
2094 | ||
c9870a62 VL |
2095 | bool smb1_is_chain(const uint8_t *buf) |
2096 | { | |
2097 | uint8_t cmd, wct, andx_cmd; | |
2098 | ||
2099 | cmd = CVAL(buf, smb_com); | |
2100 | if (!is_andx_req(cmd)) { | |
2101 | return false; | |
2102 | } | |
2103 | wct = CVAL(buf, smb_wct); | |
2104 | if (wct < 2) { | |
2105 | return false; | |
2106 | } | |
2107 | andx_cmd = CVAL(buf, smb_vwv); | |
2108 | return (andx_cmd != 0xFF); | |
2109 | } | |
2110 | ||
2111 | bool smb1_walk_chain(const uint8_t *buf, | |
2112 | bool (*fn)(uint8_t cmd, | |
2113 | uint8_t wct, const uint16_t *vwv, | |
2114 | uint16_t num_bytes, const uint8_t *bytes, | |
2115 | void *private_data), | |
2116 | void *private_data) | |
2117 | { | |
2118 | size_t smblen = smb_len(buf); | |
2119 | const char *smb_buf = smb_base(buf); | |
2120 | uint8_t cmd, chain_cmd; | |
2121 | uint8_t wct; | |
2122 | const uint16_t *vwv; | |
2123 | uint16_t num_bytes; | |
2124 | const uint8_t *bytes; | |
2125 | ||
2126 | cmd = CVAL(buf, smb_com); | |
2127 | wct = CVAL(buf, smb_wct); | |
2128 | vwv = (const uint16_t *)(buf + smb_vwv); | |
2129 | num_bytes = smb_buflen(buf); | |
2130 | bytes = (uint8_t *)smb_buf_const(buf); | |
2131 | ||
2132 | if (!fn(cmd, wct, vwv, num_bytes, bytes, private_data)) { | |
2133 | return false; | |
2134 | } | |
2135 | ||
2136 | if (!is_andx_req(cmd)) { | |
2137 | return true; | |
2138 | } | |
2139 | if (wct < 2) { | |
2140 | return false; | |
2141 | } | |
2142 | ||
2143 | chain_cmd = CVAL(vwv, 0); | |
2144 | ||
2145 | while (chain_cmd != 0xff) { | |
2146 | uint32_t chain_offset; /* uint32_t to avoid overflow */ | |
2147 | size_t length_needed; | |
2148 | ptrdiff_t vwv_offset; | |
2149 | ||
2150 | chain_offset = SVAL(vwv+1, 0); | |
2151 | ||
2152 | /* | |
2153 | * Check if the client tries to fool us. The chain | |
2154 | * offset needs to point beyond the current request in | |
2155 | * the chain, it needs to strictly grow. Otherwise we | |
2156 | * might be tricked into an endless loop always | |
2157 | * processing the same request over and over again. We | |
2158 | * used to assume that vwv and the byte buffer array | |
2159 | * in a chain are always attached, but OS/2 the | |
2160 | * Write&X/Read&X chain puts the Read&X vwv array | |
2161 | * right behind the Write&X vwv chain. The Write&X bcc | |
2162 | * array is put behind the Read&X vwv array. So now we | |
2163 | * check whether the chain offset points strictly | |
2164 | * behind the previous vwv array. req->buf points | |
2165 | * right after the vwv array of the previous | |
2166 | * request. See | |
2167 | * https://bugzilla.samba.org/show_bug.cgi?id=8360 for | |
2168 | * more information. | |
2169 | */ | |
2170 | ||
2171 | vwv_offset = ((const char *)vwv - smb_buf); | |
2172 | if (chain_offset <= vwv_offset) { | |
2173 | return false; | |
2174 | } | |
2175 | ||
2176 | /* | |
2177 | * Next check: Make sure the chain offset does not | |
2178 | * point beyond the overall smb request length. | |
2179 | */ | |
2180 | ||
2181 | length_needed = chain_offset+1; /* wct */ | |
2182 | if (length_needed > smblen) { | |
2183 | return false; | |
2184 | } | |
2185 | ||
2186 | /* | |
2187 | * Now comes the pointer magic. Goal here is to set up | |
2188 | * vwv and buf correctly again. The chain offset (the | |
2189 | * former vwv[1]) points at the new wct field. | |
2190 | */ | |
2191 | ||
2192 | wct = CVAL(smb_buf, chain_offset); | |
2193 | ||
2194 | if (is_andx_req(chain_cmd) && (wct < 2)) { | |
2195 | return false; | |
2196 | } | |
2197 | ||
2198 | /* | |
2199 | * Next consistency check: Make the new vwv array fits | |
2200 | * in the overall smb request. | |
2201 | */ | |
2202 | ||
2203 | length_needed += (wct+1)*sizeof(uint16_t); /* vwv+buflen */ | |
2204 | if (length_needed > smblen) { | |
2205 | return false; | |
2206 | } | |
2207 | vwv = (const uint16_t *)(smb_buf + chain_offset + 1); | |
2208 | ||
2209 | /* | |
2210 | * Now grab the new byte buffer.... | |
2211 | */ | |
2212 | ||
2213 | num_bytes = SVAL(vwv+wct, 0); | |
2214 | ||
2215 | /* | |
2216 | * .. and check that it fits. | |
2217 | */ | |
2218 | ||
2219 | length_needed += num_bytes; | |
2220 | if (length_needed > smblen) { | |
2221 | return false; | |
2222 | } | |
2223 | bytes = (const uint8_t *)(vwv+wct+1); | |
2224 | ||
2225 | if (!fn(chain_cmd, wct, vwv, num_bytes, bytes, private_data)) { | |
2226 | return false; | |
2227 | } | |
2228 | ||
2229 | if (!is_andx_req(chain_cmd)) { | |
2230 | return true; | |
2231 | } | |
2232 | chain_cmd = CVAL(vwv, 0); | |
2233 | } | |
2234 | return true; | |
2235 | } | |
2236 | ||
2237 | static bool smb1_chain_length_cb(uint8_t cmd, | |
2238 | uint8_t wct, const uint16_t *vwv, | |
2239 | uint16_t num_bytes, const uint8_t *bytes, | |
2240 | void *private_data) | |
2241 | { | |
2242 | unsigned *count = (unsigned *)private_data; | |
2243 | *count += 1; | |
2244 | return true; | |
2245 | } | |
2246 | ||
2247 | unsigned smb1_chain_length(const uint8_t *buf) | |
2248 | { | |
2249 | unsigned count = 0; | |
2250 | ||
2251 | if (!smb1_walk_chain(buf, smb1_chain_length_cb, &count)) { | |
2252 | return 0; | |
2253 | } | |
2254 | return count; | |
2255 | } | |
2256 | ||
2257 | struct smb1_parse_chain_state { | |
2258 | TALLOC_CTX *mem_ctx; | |
2259 | const uint8_t *buf; | |
2260 | struct smbd_server_connection *sconn; | |
2261 | bool encrypted; | |
2262 | uint32_t seqnum; | |
2263 | ||
2264 | struct smb_request **reqs; | |
2265 | unsigned num_reqs; | |
2266 | }; | |
2267 | ||
2268 | static bool smb1_parse_chain_cb(uint8_t cmd, | |
2269 | uint8_t wct, const uint16_t *vwv, | |
2270 | uint16_t num_bytes, const uint8_t *bytes, | |
2271 | void *private_data) | |
2272 | { | |
2273 | struct smb1_parse_chain_state *state = | |
2274 | (struct smb1_parse_chain_state *)private_data; | |
2275 | struct smb_request **reqs; | |
2276 | struct smb_request *req; | |
2277 | bool ok; | |
2278 | ||
2279 | reqs = talloc_realloc(state->mem_ctx, state->reqs, | |
2280 | struct smb_request *, state->num_reqs+1); | |
2281 | if (reqs == NULL) { | |
2282 | return false; | |
2283 | } | |
2284 | state->reqs = reqs; | |
2285 | ||
2286 | req = talloc(reqs, struct smb_request); | |
2287 | if (req == NULL) { | |
2288 | return false; | |
2289 | } | |
2290 | ||
2291 | ok = init_smb_request(req, state->sconn, state->buf, 0, | |
2292 | state->encrypted, state->seqnum); | |
2293 | if (!ok) { | |
2294 | return false; | |
2295 | } | |
2296 | req->cmd = cmd; | |
2297 | req->wct = wct; | |
2298 | req->vwv = vwv; | |
2299 | req->buflen = num_bytes; | |
2300 | req->buf = bytes; | |
2301 | ||
2302 | reqs[state->num_reqs] = req; | |
2303 | state->num_reqs += 1; | |
2304 | return true; | |
2305 | } | |
2306 | ||
2307 | bool smb1_parse_chain(TALLOC_CTX *mem_ctx, const uint8_t *buf, | |
2308 | struct smbd_server_connection *sconn, | |
2309 | bool encrypted, uint32_t seqnum, | |
2310 | struct smb_request ***reqs, unsigned *num_reqs) | |
2311 | { | |
2312 | struct smb1_parse_chain_state state; | |
8f93068c | 2313 | unsigned i; |
c9870a62 VL |
2314 | |
2315 | state.mem_ctx = mem_ctx; | |
2316 | state.buf = buf; | |
2317 | state.sconn = sconn; | |
2318 | state.encrypted = encrypted; | |
2319 | state.seqnum = seqnum; | |
2320 | state.reqs = NULL; | |
2321 | state.num_reqs = 0; | |
2322 | ||
2323 | if (!smb1_walk_chain(buf, smb1_parse_chain_cb, &state)) { | |
2324 | TALLOC_FREE(state.reqs); | |
2325 | return false; | |
2326 | } | |
8f93068c VL |
2327 | for (i=0; i<state.num_reqs; i++) { |
2328 | state.reqs[i]->chain = state.reqs; | |
2329 | } | |
c9870a62 VL |
2330 | *reqs = state.reqs; |
2331 | *num_reqs = state.num_reqs; | |
2332 | return true; | |
2333 | } | |
2334 | ||
3db52feb AT |
2335 | /**************************************************************************** |
2336 | Check if services need reloading. | |
2337 | ****************************************************************************/ | |
2338 | ||
70df6fcb | 2339 | static void check_reload(struct smbd_server_connection *sconn, time_t t) |
3db52feb | 2340 | { |
3db52feb | 2341 | |
0b188e77 | 2342 | if (last_smb_conf_reload_time == 0) { |
1eff0523 | 2343 | last_smb_conf_reload_time = t; |
7ebd74e6 SS |
2344 | } |
2345 | ||
ac61f650 | 2346 | if (t >= last_smb_conf_reload_time+SMBD_RELOAD_CHECK) { |
03455519 | 2347 | reload_services(sconn, conn_snum_used, true); |
1eff0523 JA |
2348 | last_smb_conf_reload_time = t; |
2349 | } | |
3db52feb | 2350 | } |
c3effa8b | 2351 | |
cad0c004 VL |
2352 | static bool fd_is_readable(int fd) |
2353 | { | |
0f082de5 | 2354 | int ret, revents; |
cad0c004 | 2355 | |
0f082de5 VL |
2356 | ret = poll_one_fd(fd, POLLIN|POLLHUP, 0, &revents); |
2357 | ||
2358 | return ((ret > 0) && ((revents & (POLLIN|POLLHUP|POLLERR)) != 0)); | |
cad0c004 | 2359 | |
cad0c004 VL |
2360 | } |
2361 | ||
fc79169c VL |
2362 | static void smbd_server_connection_write_handler( |
2363 | struct smbd_server_connection *sconn) | |
aeb798c3 SM |
2364 | { |
2365 | /* TODO: make write nonblocking */ | |
2366 | } | |
2367 | ||
cad0c004 | 2368 | static void smbd_server_connection_read_handler( |
fc79169c | 2369 | struct smbd_server_connection *sconn, int fd) |
aeb798c3 SM |
2370 | { |
2371 | uint8_t *inbuf = NULL; | |
2372 | size_t inbuf_len = 0; | |
2373 | size_t unread_bytes = 0; | |
2374 | bool encrypted = false; | |
2375 | TALLOC_CTX *mem_ctx = talloc_tos(); | |
2376 | NTSTATUS status; | |
c16c90a1 | 2377 | uint32_t seqnum; |
aeb798c3 | 2378 | |
5e0258fc VL |
2379 | bool from_client; |
2380 | ||
2381 | if (lp_async_smb_echo_handler() | |
2382 | && fd_is_readable(sconn->smb1.echo_handler.trusted_fd)) { | |
2383 | /* | |
2384 | * This is the super-ugly hack to prefer the packets | |
2385 | * forwarded by the echo handler over the ones by the | |
2386 | * client directly | |
2387 | */ | |
2388 | fd = sconn->smb1.echo_handler.trusted_fd; | |
2389 | } | |
2390 | ||
2391 | from_client = (sconn->sock == fd); | |
977aa660 | 2392 | |
cad0c004 | 2393 | if (from_client) { |
fc79169c | 2394 | smbd_lock_socket(sconn); |
cad0c004 | 2395 | |
5e0258fc VL |
2396 | if (!fd_is_readable(fd)) { |
2397 | DEBUG(10,("the echo listener was faster\n")); | |
2398 | smbd_unlock_socket(sconn); | |
2399 | return; | |
cad0c004 | 2400 | } |
5e0258fc VL |
2401 | } |
2402 | ||
2403 | /* TODO: make this completely nonblocking */ | |
2404 | status = receive_smb_talloc(mem_ctx, sconn, fd, | |
2405 | (char **)(void *)&inbuf, | |
2406 | 0, /* timeout */ | |
2407 | &unread_bytes, | |
2408 | &encrypted, | |
2409 | &inbuf_len, &seqnum, | |
2410 | false /* trusted channel */); | |
cad0c004 | 2411 | |
5e0258fc | 2412 | if (from_client) { |
fc79169c | 2413 | smbd_unlock_socket(sconn); |
977aa660 SM |
2414 | } |
2415 | ||
aeb798c3 SM |
2416 | if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) { |
2417 | goto process; | |
2418 | } | |
2419 | if (NT_STATUS_IS_ERR(status)) { | |
2420 | exit_server_cleanly("failed to receive smb request"); | |
2421 | } | |
2422 | if (!NT_STATUS_IS_OK(status)) { | |
2423 | return; | |
2424 | } | |
2425 | ||
2426 | process: | |
fc79169c | 2427 | process_smb(sconn, inbuf, inbuf_len, unread_bytes, |
c16c90a1 | 2428 | seqnum, encrypted, NULL); |
aeb798c3 SM |
2429 | } |
2430 | ||
415e8e05 | 2431 | static void smbd_server_connection_handler(struct tevent_context *ev, |
aeb798c3 SM |
2432 | struct fd_event *fde, |
2433 | uint16_t flags, | |
2434 | void *private_data) | |
2435 | { | |
2436 | struct smbd_server_connection *conn = talloc_get_type(private_data, | |
2437 | struct smbd_server_connection); | |
2438 | ||
2439 | if (flags & EVENT_FD_WRITE) { | |
2440 | smbd_server_connection_write_handler(conn); | |
c7a2e52e VL |
2441 | return; |
2442 | } | |
2443 | if (flags & EVENT_FD_READ) { | |
a2bf46e9 | 2444 | smbd_server_connection_read_handler(conn, conn->sock); |
c7a2e52e | 2445 | return; |
aeb798c3 SM |
2446 | } |
2447 | } | |
2448 | ||
415e8e05 | 2449 | static void smbd_server_echo_handler(struct tevent_context *ev, |
cad0c004 VL |
2450 | struct fd_event *fde, |
2451 | uint16_t flags, | |
2452 | void *private_data) | |
2453 | { | |
2454 | struct smbd_server_connection *conn = talloc_get_type(private_data, | |
2455 | struct smbd_server_connection); | |
2456 | ||
2457 | if (flags & EVENT_FD_WRITE) { | |
2458 | smbd_server_connection_write_handler(conn); | |
c672797a VL |
2459 | return; |
2460 | } | |
2461 | if (flags & EVENT_FD_READ) { | |
cad0c004 VL |
2462 | smbd_server_connection_read_handler( |
2463 | conn, conn->smb1.echo_handler.trusted_fd); | |
c672797a | 2464 | return; |
cad0c004 VL |
2465 | } |
2466 | } | |
27f812f3 | 2467 | |
06fb2585 | 2468 | #ifdef CLUSTER_SUPPORT |
35c0f164 SM |
2469 | |
2470 | struct smbd_release_ip_state { | |
2471 | struct smbd_server_connection *sconn; | |
2472 | char addr[INET6_ADDRSTRLEN]; | |
2473 | }; | |
2474 | ||
27f812f3 SM |
2475 | /**************************************************************************** |
2476 | received when we should release a specific IP | |
2477 | ****************************************************************************/ | |
2478 | static void release_ip(const char *ip, void *priv) | |
2479 | { | |
35c0f164 SM |
2480 | struct smbd_release_ip_state *state = |
2481 | talloc_get_type_abort(priv, | |
2482 | struct smbd_release_ip_state); | |
2483 | const char *addr = state->addr; | |
467208e9 | 2484 | const char *p = addr; |
e86a534f MA |
2485 | |
2486 | if (strncmp("::ffff:", addr, 7) == 0) { | |
2487 | p = addr + 7; | |
2488 | } | |
2489 | ||
642c6ba2 CA |
2490 | DEBUG(10, ("Got release IP message for %s, " |
2491 | "our address is %s\n", ip, p)); | |
2492 | ||
7d6e4c7e | 2493 | if ((strcmp(p, ip) == 0) || ((p != addr) && strcmp(addr, ip) == 0)) { |
27f812f3 SM |
2494 | DEBUG(0,("Got release IP message for our IP %s - exiting immediately\n", |
2495 | ip)); | |
35c0f164 SM |
2496 | /* |
2497 | * With SMB2 we should do a clean disconnect, | |
2498 | * the previous_session_id in the session setup | |
2499 | * will cleanup the old session, tcons and opens. | |
2500 | * | |
2501 | * A clean disconnect is needed in order to support | |
2502 | * durable handles. | |
2503 | * | |
2504 | * Note: typically this is never triggered | |
2505 | * as we got a TCP RST (triggered by ctdb event scripts) | |
2506 | * before we get CTDB_SRVID_RELEASE_IP. | |
2507 | * | |
2508 | * We used to call _exit(1) here, but as this was mostly never | |
2509 | * triggered and has implication on our process model, | |
2510 | * we can just use smbd_server_connection_terminate() | |
2511 | * (also for SMB1). | |
2512 | */ | |
2513 | smbd_server_connection_terminate(state->sconn, | |
2514 | "CTDB_SRVID_RELEASE_IP"); | |
2515 | return; | |
27f812f3 SM |
2516 | } |
2517 | } | |
2518 | ||
13de233f SM |
2519 | static NTSTATUS smbd_register_ips(struct smbd_server_connection *sconn, |
2520 | struct sockaddr_storage *srv, | |
2521 | struct sockaddr_storage *clnt) | |
2522 | { | |
35c0f164 | 2523 | struct smbd_release_ip_state *state; |
13de233f | 2524 | struct ctdbd_connection *cconn; |
13de233f SM |
2525 | |
2526 | cconn = messaging_ctdbd_connection(); | |
2527 | if (cconn == NULL) { | |
2528 | return NT_STATUS_NO_MEMORY; | |
2529 | } | |
2530 | ||
35c0f164 SM |
2531 | state = talloc_zero(sconn, struct smbd_release_ip_state); |
2532 | if (state == NULL) { | |
13de233f SM |
2533 | return NT_STATUS_NO_MEMORY; |
2534 | } | |
35c0f164 SM |
2535 | state->sconn = sconn; |
2536 | if (print_sockaddr(state->addr, sizeof(state->addr), srv) == NULL) { | |
13de233f SM |
2537 | return NT_STATUS_NO_MEMORY; |
2538 | } | |
35c0f164 SM |
2539 | |
2540 | return ctdbd_register_ips(cconn, srv, clnt, release_ip, state); | |
13de233f SM |
2541 | } |
2542 | ||
f83e7d8f | 2543 | static int client_get_tcp_info(int sock, struct sockaddr_storage *server, |
27f812f3 SM |
2544 | struct sockaddr_storage *client) |
2545 | { | |
2546 | socklen_t length; | |
27f812f3 | 2547 | length = sizeof(*server); |
f83e7d8f | 2548 | if (getsockname(sock, (struct sockaddr *)server, &length) != 0) { |
27f812f3 SM |
2549 | return -1; |
2550 | } | |
2551 | length = sizeof(*client); | |
f83e7d8f | 2552 | if (getpeername(sock, (struct sockaddr *)client, &length) != 0) { |
27f812f3 SM |
2553 | return -1; |
2554 | } | |
2555 | return 0; | |
2556 | } | |
2557 | #endif | |
2558 | ||
2559 | /* | |
2560 | * Send keepalive packets to our client | |
2561 | */ | |
2562 | static bool keepalive_fn(const struct timeval *now, void *private_data) | |
2563 | { | |
d911bd5c VL |
2564 | struct smbd_server_connection *sconn = talloc_get_type_abort( |
2565 | private_data, struct smbd_server_connection); | |
c1653e3b SM |
2566 | bool ret; |
2567 | ||
d28fa8fa | 2568 | if (sconn->using_smb2) { |
efd0c35a JA |
2569 | /* Don't do keepalives on an SMB2 connection. */ |
2570 | return false; | |
2571 | } | |
2572 | ||
bf35606b | 2573 | smbd_lock_socket(sconn); |
bb867df2 | 2574 | ret = send_keepalive(sconn->sock); |
bf35606b | 2575 | smbd_unlock_socket(sconn); |
c1653e3b SM |
2576 | |
2577 | if (!ret) { | |
40ae8b74 VL |
2578 | char addr[INET6_ADDRSTRLEN]; |
2579 | /* | |
2580 | * Try and give an error message saying what | |
2581 | * client failed. | |
2582 | */ | |
2583 | DEBUG(0, ("send_keepalive failed for client %s. " | |
2584 | "Error %s - exiting\n", | |
2585 | get_peer_addr(sconn->sock, addr, sizeof(addr)), | |
2586 | strerror(errno))); | |
27f812f3 SM |
2587 | return False; |
2588 | } | |
2589 | return True; | |
2590 | } | |
2591 | ||
2592 | /* | |
2593 | * Do the recurring check if we're idle | |
2594 | */ | |
2595 | static bool deadtime_fn(const struct timeval *now, void *private_data) | |
2596 | { | |
72fd7fb4 VL |
2597 | struct smbd_server_connection *sconn = |
2598 | (struct smbd_server_connection *)private_data; | |
6f30b9a6 | 2599 | |
c8620180 SM |
2600 | if ((conn_num_open(sconn) == 0) |
2601 | || (conn_idle_all(sconn, now->tv_sec))) { | |
e7d0f478 | 2602 | DEBUG( 2, ( "Closing idle connection\n" ) ); |
790ad3d1 VL |
2603 | messaging_send(sconn->msg_ctx, |
2604 | messaging_server_id(sconn->msg_ctx), | |
27f812f3 SM |
2605 | MSG_SHUTDOWN, &data_blob_null); |
2606 | return False; | |
2607 | } | |
2608 | ||
2609 | return True; | |
2610 | } | |
2611 | ||
2612 | /* | |
2613 | * Do the recurring log file and smb.conf reload checks. | |
2614 | */ | |
2615 | ||
2616 | static bool housekeeping_fn(const struct timeval *now, void *private_data) | |
2617 | { | |
babfe237 VL |
2618 | struct smbd_server_connection *sconn = talloc_get_type_abort( |
2619 | private_data, struct smbd_server_connection); | |
0b188e77 DD |
2620 | |
2621 | DEBUG(5, ("housekeeping\n")); | |
2622 | ||
27f812f3 SM |
2623 | change_to_root_user(); |
2624 | ||
2625 | /* update printer queue caches if necessary */ | |
babfe237 | 2626 | update_monitored_printq_cache(sconn->msg_ctx); |
27f812f3 SM |
2627 | |
2628 | /* check if we need to reload services */ | |
0b188e77 | 2629 | check_reload(sconn, time_mono(NULL)); |
27f812f3 | 2630 | |
27f812f3 SM |
2631 | /* |
2632 | * Force a log file check. | |
2633 | */ | |
2634 | force_check_log_size(); | |
2635 | check_log_size(); | |
2636 | return true; | |
2637 | } | |
2638 | ||
27afb891 VL |
2639 | /* |
2640 | * Read an smb packet in the echo handler child, giving the parent | |
2641 | * smbd one second to react once the socket becomes readable. | |
2642 | */ | |
2643 | ||
2644 | struct smbd_echo_read_state { | |
2645 | struct tevent_context *ev; | |
2646 | struct smbd_server_connection *sconn; | |
2647 | ||
2648 | char *buf; | |
2649 | size_t buflen; | |
2650 | uint32_t seqnum; | |
2651 | }; | |
2652 | ||
2653 | static void smbd_echo_read_readable(struct tevent_req *subreq); | |
2654 | static void smbd_echo_read_waited(struct tevent_req *subreq); | |
2655 | ||
2656 | static struct tevent_req *smbd_echo_read_send( | |
2657 | TALLOC_CTX *mem_ctx, struct tevent_context *ev, | |
2658 | struct smbd_server_connection *sconn) | |
2659 | { | |
2660 | struct tevent_req *req, *subreq; | |
2661 | struct smbd_echo_read_state *state; | |
2662 | ||
2663 | req = tevent_req_create(mem_ctx, &state, | |
2664 | struct smbd_echo_read_state); | |
2665 | if (req == NULL) { | |
2666 | return NULL; | |
2667 | } | |
2668 | state->ev = ev; | |
2669 | state->sconn = sconn; | |
2670 | ||
2671 | subreq = wait_for_read_send(state, ev, sconn->sock); | |
2672 | if (tevent_req_nomem(subreq, req)) { | |
2673 | return tevent_req_post(req, ev); | |
2674 | } | |
2675 | tevent_req_set_callback(subreq, smbd_echo_read_readable, req); | |
2676 | return req; | |
2677 | } | |
2678 | ||
2679 | static void smbd_echo_read_readable(struct tevent_req *subreq) | |
2680 | { | |
2681 | struct tevent_req *req = tevent_req_callback_data( | |
2682 | subreq, struct tevent_req); | |
2683 | struct smbd_echo_read_state *state = tevent_req_data( | |
2684 | req, struct smbd_echo_read_state); | |
2685 | bool ok; | |
2686 | int err; | |
2687 | ||
2688 | ok = wait_for_read_recv(subreq, &err); | |
2689 | TALLOC_FREE(subreq); | |
2690 | if (!ok) { | |
2691 | tevent_req_nterror(req, map_nt_error_from_unix(err)); | |
2692 | return; | |
2693 | } | |
2694 | ||
2695 | /* | |
2696 | * Give the parent smbd one second to step in | |
2697 | */ | |
2698 | ||
2699 | subreq = tevent_wakeup_send( | |
2700 | state, state->ev, timeval_current_ofs(1, 0)); | |
2701 | if (tevent_req_nomem(subreq, req)) { | |
2702 | return; | |
2703 | } | |
2704 | tevent_req_set_callback(subreq, smbd_echo_read_waited, req); | |
2705 | } | |
2706 | ||
2707 | static void smbd_echo_read_waited(struct tevent_req *subreq) | |
2708 | { | |
2709 | struct tevent_req *req = tevent_req_callback_data( | |
2710 | subreq, struct tevent_req); | |
2711 | struct smbd_echo_read_state *state = tevent_req_data( | |
2712 | req, struct smbd_echo_read_state); | |
2713 | struct smbd_server_connection *sconn = state->sconn; | |
2714 | bool ok; | |
2715 | NTSTATUS status; | |
2716 | size_t unread = 0; | |
2717 | bool encrypted; | |
2718 | ||
2719 | ok = tevent_wakeup_recv(subreq); | |
2720 | TALLOC_FREE(subreq); | |
2721 | if (!ok) { | |
2722 | tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR); | |
2723 | return; | |
2724 | } | |
2725 | ||
2726 | ok = smbd_lock_socket_internal(sconn); | |
2727 | if (!ok) { | |
2728 | tevent_req_nterror(req, map_nt_error_from_unix(errno)); | |
2729 | DEBUG(0, ("%s: failed to lock socket\n", __location__)); | |
2730 | return; | |
2731 | } | |
2732 | ||
2733 | if (!fd_is_readable(sconn->sock)) { | |
2734 | DEBUG(10,("echo_handler[%d] the parent smbd was faster\n", | |
c0288e06 | 2735 | (int)getpid())); |
27afb891 VL |
2736 | |
2737 | ok = smbd_unlock_socket_internal(sconn); | |
2738 | if (!ok) { | |
2739 | tevent_req_nterror(req, map_nt_error_from_unix(errno)); | |
2740 | DEBUG(1, ("%s: failed to unlock socket\n", | |
2741 | __location__)); | |
2742 | return; | |
2743 | } | |
2744 | ||
2745 | subreq = wait_for_read_send(state, state->ev, sconn->sock); | |
2746 | if (tevent_req_nomem(subreq, req)) { | |
2747 | return; | |
2748 | } | |
2749 | tevent_req_set_callback(subreq, smbd_echo_read_readable, req); | |
2750 | return; | |
2751 | } | |
2752 | ||
2753 | status = receive_smb_talloc(state, sconn, sconn->sock, &state->buf, | |
2754 | 0 /* timeout */, | |
2755 | &unread, | |
2756 | &encrypted, | |
2757 | &state->buflen, | |
2758 | &state->seqnum, | |
2759 | false /* trusted_channel*/); | |
2760 | ||
2761 | if (tevent_req_nterror(req, status)) { | |
2762 | tevent_req_nterror(req, status); | |
2763 | DEBUG(1, ("echo_handler[%d]: receive_smb_raw_talloc failed: %s\n", | |
c0288e06 | 2764 | (int)getpid(), nt_errstr(status))); |
27afb891 VL |
2765 | return; |
2766 | } | |
2767 | ||
2768 | ok = smbd_unlock_socket_internal(sconn); | |
2769 | if (!ok) { | |
2770 | tevent_req_nterror(req, map_nt_error_from_unix(errno)); | |
2771 | DEBUG(1, ("%s: failed to unlock socket\n", __location__)); | |
2772 | return; | |
2773 | } | |
2774 | tevent_req_done(req); | |
2775 | } | |
2776 | ||
2777 | static NTSTATUS smbd_echo_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, | |
2778 | char **pbuf, size_t *pbuflen, uint32_t *pseqnum) | |
2779 | { | |
2780 | struct smbd_echo_read_state *state = tevent_req_data( | |
2781 | req, struct smbd_echo_read_state); | |
2782 | NTSTATUS status; | |
2783 | ||
2784 | if (tevent_req_is_nterror(req, &status)) { | |
2785 | return status; | |
2786 | } | |
2787 | *pbuf = talloc_move(mem_ctx, &state->buf); | |
2788 | *pbuflen = state->buflen; | |
2789 | *pseqnum = state->seqnum; | |
2790 | return NT_STATUS_OK; | |
2791 | } | |
2792 | ||
cad0c004 VL |
2793 | struct smbd_echo_state { |
2794 | struct tevent_context *ev; | |
2795 | struct iovec *pending; | |
2796 | struct smbd_server_connection *sconn; | |
2797 | int parent_pipe; | |
2798 | ||
2799 | struct tevent_fd *parent_fde; | |
2800 | ||
cad0c004 VL |
2801 | struct tevent_req *write_req; |
2802 | }; | |
2803 | ||
2804 | static void smbd_echo_writer_done(struct tevent_req *req); | |
2805 | ||
2806 | static void smbd_echo_activate_writer(struct smbd_echo_state *state) | |
2807 | { | |
2808 | int num_pending; | |
2809 | ||
2810 | if (state->write_req != NULL) { | |
2811 | return; | |
2812 | } | |
2813 | ||
2814 | num_pending = talloc_array_length(state->pending); | |
2815 | if (num_pending == 0) { | |
2816 | return; | |
2817 | } | |
2818 | ||
2819 | state->write_req = writev_send(state, state->ev, NULL, | |
2820 | state->parent_pipe, false, | |
2821 | state->pending, num_pending); | |
2822 | if (state->write_req == NULL) { | |
2823 | DEBUG(1, ("writev_send failed\n")); | |
2824 | exit(1); | |
2825 | } | |
2826 | ||
2827 | talloc_steal(state->write_req, state->pending); | |
2828 | state->pending = NULL; | |
2829 | ||
2830 | tevent_req_set_callback(state->write_req, smbd_echo_writer_done, | |
2831 | state); | |
2832 | } | |
2833 | ||
2834 | static void smbd_echo_writer_done(struct tevent_req *req) | |
2835 | { | |
2836 | struct smbd_echo_state *state = tevent_req_callback_data( | |
2837 | req, struct smbd_echo_state); | |
2838 | ssize_t written; | |
2839 | int err; | |
2840 | ||
2841 | written = writev_recv(req, &err); | |
2842 | TALLOC_FREE(req); | |
2843 | state->write_req = NULL; | |
2844 | if (written == -1) { | |
2845 | DEBUG(1, ("writev to parent failed: %s\n", strerror(err))); | |
2846 | exit(1); | |
2847 | } | |
c0288e06 | 2848 | DEBUG(10,("echo_handler[%d]: forwarded pdu to main\n", (int)getpid())); |
cad0c004 VL |
2849 | smbd_echo_activate_writer(state); |
2850 | } | |
2851 | ||
0b8eeb1e SM |
2852 | static bool smbd_echo_reply(struct smbd_echo_state *state, |
2853 | uint8_t *inbuf, size_t inbuf_len, | |
cad0c004 VL |
2854 | uint32_t seqnum) |
2855 | { | |
2856 | struct smb_request req; | |
2857 | uint16_t num_replies; | |
cad0c004 VL |
2858 | char *outbuf; |
2859 | bool ok; | |
2860 | ||
0633c0f6 | 2861 | if ((inbuf_len == 4) && (CVAL(inbuf, 0) == NBSSkeepalive)) { |
fd9effce VL |
2862 | DEBUG(10, ("Got netbios keepalive\n")); |
2863 | /* | |
2864 | * Just swallow it | |
2865 | */ | |
2866 | return true; | |
2867 | } | |
2868 | ||
cad0c004 VL |
2869 | if (inbuf_len < smb_size) { |
2870 | DEBUG(10, ("Got short packet: %d bytes\n", (int)inbuf_len)); | |
2871 | return false; | |
2872 | } | |
0b8eeb1e | 2873 | if (!valid_smb_header(state->sconn, inbuf)) { |
cad0c004 VL |
2874 | DEBUG(10, ("Got invalid SMB header\n")); |
2875 | return false; | |
2876 | } | |
2877 | ||
0b8eeb1e | 2878 | if (!init_smb_request(&req, state->sconn, inbuf, 0, false, |
d7bc5fe7 | 2879 | seqnum)) { |
cad0c004 VL |
2880 | return false; |
2881 | } | |
2882 | req.inbuf = inbuf; | |
2883 | ||
2884 | DEBUG(10, ("smbecho handler got cmd %d (%s)\n", (int)req.cmd, | |
2885 | smb_messages[req.cmd].name | |
2886 | ? smb_messages[req.cmd].name : "unknown")); | |
2887 | ||
2888 | if (req.cmd != SMBecho) { | |
2889 | return false; | |
2890 | } | |
2891 | if (req.wct < 1) { | |
2892 | return false; | |
2893 | } | |
2894 | ||
2895 | num_replies = SVAL(req.vwv+0, 0); | |
2896 | if (num_replies != 1) { | |
2897 | /* Not a Windows "Hey, you're still there?" request */ | |
2898 | return false; | |
2899 | } | |
2900 | ||
4f41be35 | 2901 | if (!create_outbuf(talloc_tos(), &req, (const char *)req.inbuf, &outbuf, |
cad0c004 VL |
2902 | 1, req.buflen)) { |
2903 | DEBUG(10, ("create_outbuf failed\n")); | |
2904 | return false; | |
2905 | } | |
2906 | req.outbuf = (uint8_t *)outbuf; | |
2907 | ||
2908 | SSVAL(req.outbuf, smb_vwv0, num_replies); | |
2909 | ||
2910 | if (req.buflen > 0) { | |
2911 | memcpy(smb_buf(req.outbuf), req.buf, req.buflen); | |
2912 | } | |
2913 | ||
1808dd0a | 2914 | ok = srv_send_smb(req.sconn, |
cad0c004 VL |
2915 | (char *)outbuf, |
2916 | true, seqnum+1, | |
2917 | false, &req.pcd); | |
2918 | TALLOC_FREE(outbuf); | |
2919 | if (!ok) { | |
2920 | exit(1); | |
2921 | } | |
2922 | ||
2923 | return true; | |
2924 | } | |
2925 | ||
2926 | static void smbd_echo_exit(struct tevent_context *ev, | |
2927 | struct tevent_fd *fde, uint16_t flags, | |
2928 | void *private_data) | |
2929 | { | |
2930 | DEBUG(2, ("smbd_echo_exit: lost connection to parent\n")); | |
2931 | exit(0); | |
2932 | } | |
2933 | ||
710e5d92 VL |
2934 | static void smbd_echo_got_packet(struct tevent_req *req); |
2935 | ||
cad0c004 VL |
2936 | static void smbd_echo_loop(struct smbd_server_connection *sconn, |
2937 | int parent_pipe) | |
2938 | { | |
2939 | struct smbd_echo_state *state; | |
710e5d92 | 2940 | struct tevent_req *read_req; |
cad0c004 VL |
2941 | |
2942 | state = talloc_zero(sconn, struct smbd_echo_state); | |
2943 | if (state == NULL) { | |
2944 | DEBUG(1, ("talloc failed\n")); | |
2945 | return; | |
2946 | } | |
2947 | state->sconn = sconn; | |
2948 | state->parent_pipe = parent_pipe; | |
2949 | state->ev = s3_tevent_context_init(state); | |
2950 | if (state->ev == NULL) { | |
2951 | DEBUG(1, ("tevent_context_init failed\n")); | |
2952 | TALLOC_FREE(state); | |
2953 | return; | |
2954 | } | |
2955 | state->parent_fde = tevent_add_fd(state->ev, state, parent_pipe, | |
2956 | TEVENT_FD_READ, smbd_echo_exit, | |
2957 | state); | |
2958 | if (state->parent_fde == NULL) { | |
2959 | DEBUG(1, ("tevent_add_fd failed\n")); | |
2960 | TALLOC_FREE(state); | |
2961 | return; | |
2962 | } | |
710e5d92 VL |
2963 | |
2964 | read_req = smbd_echo_read_send(state, state->ev, sconn); | |
2965 | if (read_req == NULL) { | |
2966 | DEBUG(1, ("smbd_echo_read_send failed\n")); | |
cad0c004 VL |
2967 | TALLOC_FREE(state); |
2968 | return; | |
2969 | } | |
710e5d92 | 2970 | tevent_req_set_callback(read_req, smbd_echo_got_packet, state); |
cad0c004 VL |
2971 | |
2972 | while (true) { | |
2973 | if (tevent_loop_once(state->ev) == -1) { | |
2974 | DEBUG(1, ("tevent_loop_once failed: %s\n", | |
2975 | strerror(errno))); | |
2976 | break; | |
2977 | } | |
2978 | } | |
2979 | TALLOC_FREE(state); | |
2980 | } | |
2981 | ||
710e5d92 VL |
2982 | static void smbd_echo_got_packet(struct tevent_req *req) |
2983 | { | |
2984 | struct smbd_echo_state *state = tevent_req_callback_data( | |
2985 | req, struct smbd_echo_state); | |
2986 | NTSTATUS status; | |
2987 | char *buf = NULL; | |
2988 | size_t buflen = 0; | |
2989 | uint32_t seqnum = 0; | |
2990 | bool reply; | |
2991 | ||
2992 | status = smbd_echo_read_recv(req, state, &buf, &buflen, &seqnum); | |
2993 | TALLOC_FREE(req); | |
2994 | if (!NT_STATUS_IS_OK(status)) { | |
2995 | DEBUG(1, ("smbd_echo_read_recv returned %s\n", | |
2996 | nt_errstr(status))); | |
2997 | exit(1); | |
2998 | } | |
2999 | ||
0b8eeb1e | 3000 | reply = smbd_echo_reply(state, (uint8_t *)buf, buflen, seqnum); |
710e5d92 VL |
3001 | if (!reply) { |
3002 | size_t num_pending; | |
3003 | struct iovec *tmp; | |
3004 | struct iovec *iov; | |
3005 | ||
3006 | num_pending = talloc_array_length(state->pending); | |
3007 | tmp = talloc_realloc(state, state->pending, struct iovec, | |
3008 | num_pending+1); | |
3009 | if (tmp == NULL) { | |
3010 | DEBUG(1, ("talloc_realloc failed\n")); | |
3011 | exit(1); | |
3012 | } | |
3013 | state->pending = tmp; | |
3014 | ||
3015 | if (buflen >= smb_size) { | |
3016 | /* | |
3017 | * place the seqnum in the packet so that the main process | |
3018 | * can reply with signing | |
3019 | */ | |
3020 | SIVAL(buf, smb_ss_field, seqnum); | |
3021 | SIVAL(buf, smb_ss_field+4, NT_STATUS_V(NT_STATUS_OK)); | |
3022 | } | |
3023 | ||
3024 | iov = &state->pending[num_pending]; | |
3d5c534f | 3025 | iov->iov_base = talloc_move(state->pending, &buf); |
710e5d92 VL |
3026 | iov->iov_len = buflen; |
3027 | ||
3028 | DEBUG(10,("echo_handler[%d]: forward to main\n", | |
c0288e06 | 3029 | (int)getpid())); |
710e5d92 VL |
3030 | smbd_echo_activate_writer(state); |
3031 | } | |
3032 | ||
3033 | req = smbd_echo_read_send(state, state->ev, state->sconn); | |
3034 | if (req == NULL) { | |
3035 | DEBUG(1, ("smbd_echo_read_send failed\n")); | |
3036 | exit(1); | |
3037 | } | |
3038 | tevent_req_set_callback(req, smbd_echo_got_packet, state); | |
3039 | } | |
3040 | ||
3041 | ||
cad0c004 VL |
3042 | /* |
3043 | * Handle SMBecho requests in a forked child process | |
3044 | */ | |
8a2eff87 | 3045 | bool fork_echo_handler(struct smbd_server_connection *sconn) |
cad0c004 VL |
3046 | { |
3047 | int listener_pipe[2]; | |
3048 | int res; | |
3049 | pid_t child; | |
3050 | ||
3051 | res = pipe(listener_pipe); | |
3052 | if (res == -1) { | |
3053 | DEBUG(1, ("pipe() failed: %s\n", strerror(errno))); | |
3054 | return false; | |
3055 | } | |
3056 | sconn->smb1.echo_handler.socket_lock_fd = create_unlink_tmp(lp_lockdir()); | |
3057 | if (sconn->smb1.echo_handler.socket_lock_fd == -1) { | |
3058 | DEBUG(1, ("Could not create lock fd: %s\n", strerror(errno))); | |
3059 | goto fail; | |
3060 | } | |
3061 | ||
c0288e06 | 3062 | child = fork(); |
cad0c004 VL |
3063 | if (child == 0) { |
3064 | NTSTATUS status; | |
3065 | ||
3066 | close(listener_pipe[0]); | |
342c79e2 | 3067 | set_blocking(listener_pipe[1], false); |
cad0c004 | 3068 | |
72fd7fb4 | 3069 | status = reinit_after_fork(sconn->msg_ctx, |
bf8cce18 | 3070 | sconn->ev_ctx, |
0fa31296 | 3071 | true); |
cad0c004 VL |
3072 | if (!NT_STATUS_IS_OK(status)) { |
3073 | DEBUG(1, ("reinit_after_fork failed: %s\n", | |
3074 | nt_errstr(status))); | |
3075 | exit(1); | |
3076 | } | |
3077 | smbd_echo_loop(sconn, listener_pipe[1]); | |
3078 | exit(0); | |
3079 | } | |
3080 | close(listener_pipe[1]); | |
3081 | listener_pipe[1] = -1; | |
3082 | sconn->smb1.echo_handler.trusted_fd = listener_pipe[0]; | |
3083 | ||
c0288e06 | 3084 | DEBUG(10,("fork_echo_handler: main[%d] echo_child[%d]\n", (int)getpid(), child)); |
cad0c004 VL |
3085 | |
3086 | /* | |
3087 | * Without smb signing this is the same as the normal smbd | |
3088 | * listener. This needs to change once signing comes in. | |
3089 | */ | |
bf8cce18 | 3090 | sconn->smb1.echo_handler.trusted_fde = tevent_add_fd(sconn->ev_ctx, |
cad0c004 VL |
3091 | sconn, |
3092 | sconn->smb1.echo_handler.trusted_fd, | |
bf8cce18 | 3093 | TEVENT_FD_READ, |
cad0c004 VL |
3094 | smbd_server_echo_handler, |
3095 | sconn); | |
3096 | if (sconn->smb1.echo_handler.trusted_fde == NULL) { | |
3097 | DEBUG(1, ("event_add_fd failed\n")); | |
3098 | goto fail; | |
3099 | } | |
3100 | ||
3101 | return true; | |
3102 | ||
3103 | fail: | |
3104 | if (listener_pipe[0] != -1) { | |
3105 | close(listener_pipe[0]); | |
3106 | } | |
3107 | if (listener_pipe[1] != -1) { | |
3108 | close(listener_pipe[1]); | |
3109 | } | |
3110 | sconn->smb1.echo_handler.trusted_fd = -1; | |
3111 | if (sconn->smb1.echo_handler.socket_lock_fd != -1) { | |
3112 | close(sconn->smb1.echo_handler.socket_lock_fd); | |
3113 | } | |
3114 | sconn->smb1.echo_handler.trusted_fd = -1; | |
3115 | sconn->smb1.echo_handler.socket_lock_fd = -1; | |
3116 | return false; | |
3117 | } | |
3118 | ||
715933a3 SM |
3119 | static bool uid_in_use(const struct user_struct *user, uid_t uid) |
3120 | { | |
3121 | while (user) { | |
3122 | if (user->session_info && | |
3123 | (user->session_info->unix_token->uid == uid)) { | |
3124 | return true; | |
3125 | } | |
3126 | user = user->next; | |
3127 | } | |
3128 | return false; | |
3129 | } | |
3130 | ||
3131 | static bool gid_in_use(const struct user_struct *user, gid_t gid) | |
3132 | { | |
3133 | while (user) { | |
3134 | if (user->session_info != NULL) { | |
3135 | int i; | |
3136 | struct security_unix_token *utok; | |
3137 | ||
3138 | utok = user->session_info->unix_token; | |
3139 | if (utok->gid == gid) { | |
3140 | return true; | |
3141 | } | |
3142 | for(i=0; i<utok->ngroups; i++) { | |
3143 | if (utok->groups[i] == gid) { | |
3144 | return true; | |
3145 | } | |
3146 | } | |
3147 | } | |
3148 | user = user->next; | |
3149 | } | |
3150 | return false; | |
3151 | } | |
3152 | ||
3153 | static bool sid_in_use(const struct user_struct *user, | |
3154 | const struct dom_sid *psid) | |
3155 | { | |
3156 | while (user) { | |
3157 | struct security_token *tok; | |
3158 | ||
3159 | if (user->session_info == NULL) { | |
3160 | continue; | |
3161 | } | |
3162 | tok = user->session_info->security_token; | |
3163 | if (tok == NULL) { | |
3164 | /* | |
3165 | * Not sure session_info->security_token can | |
3166 | * ever be NULL. This check might be not | |
3167 | * necessary. | |
3168 | */ | |
3169 | continue; | |
3170 | } | |
3171 | if (security_token_has_sid(tok, psid)) { | |
3172 | return true; | |
3173 | } | |
3174 | user = user->next; | |
3175 | } | |
3176 | return false; | |
3177 | } | |
3178 | ||
3179 | static bool id_in_use(const struct user_struct *user, | |
3180 | const struct id_cache_ref *id) | |
3181 | { | |
3182 | switch(id->type) { | |
3183 | case UID: | |
3184 | return uid_in_use(user, id->id.uid); | |
3185 | case GID: | |
3186 | return gid_in_use(user, id->id.gid); | |
3187 | case SID: | |
3188 | return sid_in_use(user, &id->id.sid); | |
3189 | default: | |
3190 | break; | |
3191 | } | |
3192 | return false; | |
3193 | } | |
3194 | ||
3195 | static void smbd_id_cache_kill(struct messaging_context *msg_ctx, | |
3196 | void *private_data, | |
3197 | uint32_t msg_type, | |
3198 | struct server_id server_id, | |
3199 | DATA_BLOB* data) | |
3200 | { | |
3201 | const char *msg = (data && data->data) | |
3202 | ? (const char *)data->data : "<NULL>"; | |
715933a3 SM |
3203 | struct id_cache_ref id; |
3204 | struct smbd_server_connection *sconn = | |
3205 | talloc_get_type_abort(private_data, | |
3206 | struct smbd_server_connection); | |
3207 | ||
715933a3 SM |
3208 | if (!id_cache_ref_parse(msg, &id)) { |
3209 | DEBUG(0, ("Invalid ?ID: %s\n", msg)); | |
3210 | return; | |
3211 | } | |
3212 | ||
6ce72a01 | 3213 | if (id_in_use(sconn->users, &id)) { |
715933a3 SM |
3214 | exit_server_cleanly(msg); |
3215 | } | |
3216 | id_cache_delete_from_cache(&id); | |
3217 | } | |
3218 | ||
b3235d48 SM |
3219 | NTSTATUS smbXsrv_connection_init_tables(struct smbXsrv_connection *conn, |
3220 | enum protocol_types protocol) | |
3221 | { | |
02d206ee SM |
3222 | NTSTATUS status; |
3223 | ||
b3235d48 SM |
3224 | set_Protocol(protocol); |
3225 | conn->protocol = protocol; | |
3226 | ||
02d206ee SM |
3227 | if (protocol >= PROTOCOL_SMB2_02) { |
3228 | status = smb2srv_session_table_init(conn); | |
3229 | if (!NT_STATUS_IS_OK(status)) { | |
3230 | return status; | |
3231 | } | |
7d139553 SM |
3232 | |
3233 | status = smb2srv_open_table_init(conn); | |
3234 | if (!NT_STATUS_IS_OK(status)) { | |
3235 | return status; | |
3236 | } | |
faa8edcc | 3237 | } else { |
a129e271 SM |
3238 | status = smb1srv_session_table_init(conn); |
3239 | if (!NT_STATUS_IS_OK(status)) { | |
3240 | return status; | |
3241 | } | |
3242 | ||
faa8edcc SM |
3243 | status = smb1srv_tcon_table_init(conn); |
3244 | if (!NT_STATUS_IS_OK(status)) { | |
3245 | return status; | |
3246 | } | |
7d139553 SM |
3247 | |
3248 | status = smb1srv_open_table_init(conn); | |
3249 | if (!NT_STATUS_IS_OK(status)) { | |
3250 | return status; | |
3251 | } | |
02d206ee SM |
3252 | } |
3253 | ||
b3235d48 SM |
3254 | return NT_STATUS_OK; |
3255 | } | |
3256 | ||
fc96488c SM |
3257 | static void smbd_tevent_trace_callback(enum tevent_trace_point point, |
3258 | void *private_data) | |
3259 | { | |
cd260391 SM |
3260 | struct smbXsrv_connection *conn = |
3261 | talloc_get_type_abort(private_data, | |
3262 | struct smbXsrv_connection); | |
3263 | ||
fc96488c SM |
3264 | switch (point) { |
3265 | case TEVENT_TRACE_BEFORE_WAIT: | |
b40fa943 SM |
3266 | /* |
3267 | * This just removes compiler warning | |
3268 | * without profile support | |
3269 | */ | |
3270 | conn->smbd_idle_profstamp = 0; | |
cd260391 | 3271 | START_PROFILE_STAMP(smbd_idle, conn->smbd_idle_profstamp); |
fc96488c SM |
3272 | break; |
3273 | case TEVENT_TRACE_AFTER_WAIT: | |
cd260391 | 3274 | END_PROFILE_STAMP(smbd_idle, conn->smbd_idle_profstamp); |
fc96488c SM |
3275 | break; |
3276 | } | |
3277 | } | |
3278 | ||
f2f55d70 JA |
3279 | /**************************************************************************** |
3280 | Process commands from the client | |
3281 | ****************************************************************************/ | |
3282 | ||
dd3a9279 | 3283 | void smbd_process(struct tevent_context *ev_ctx, |
b5e9ece1 SM |
3284 | struct messaging_context *msg_ctx, |
3285 | int sock_fd, | |
3286 | bool interactive) | |
f2f55d70 | 3287 | { |
27f812f3 | 3288 | TALLOC_CTX *frame = talloc_stackframe(); |
b5e9ece1 SM |
3289 | struct smbXsrv_connection *conn; |
3290 | struct smbd_server_connection *sconn; | |
b764145a SM |
3291 | struct sockaddr_storage ss; |
3292 | struct sockaddr *sa = NULL; | |
db6d1c62 | 3293 | socklen_t sa_socklen; |
b764145a SM |
3294 | struct tsocket_address *local_address = NULL; |
3295 | struct tsocket_address *remote_address = NULL; | |
3d7521c8 | 3296 | const char *locaddr = NULL; |
b764145a | 3297 | const char *remaddr = NULL; |
a513086c | 3298 | char *rhost; |
b764145a | 3299 | int ret; |
27f812f3 | 3300 | |
b5e9ece1 SM |
3301 | conn = talloc_zero(ev_ctx, struct smbXsrv_connection); |
3302 | if (conn == NULL) { | |
b3235d48 SM |
3303 | DEBUG(0,("talloc_zero(struct smbXsrv_connection)\n")); |
3304 | exit_server_cleanly("talloc_zero(struct smbXsrv_connection).\n"); | |
3305 | } | |
3306 | ||
b5e9ece1 SM |
3307 | conn->ev_ctx = ev_ctx; |
3308 | conn->msg_ctx = msg_ctx; | |
3309 | ||
3310 | sconn = talloc_zero(conn, struct smbd_server_connection); | |
3311 | if (!sconn) { | |
3312 | exit_server("failed to create smbd_server_connection"); | |
3313 | } | |
3314 | ||
3315 | conn->sconn = sconn; | |
3316 | sconn->conn = conn; | |
3317 | ||
3318 | /* | |
3319 | * TODO: remove this...:-) | |
3320 | */ | |
3321 | global_smbXsrv_connection = conn; | |
3322 | ||
3323 | sconn->ev_ctx = ev_ctx; | |
3324 | sconn->msg_ctx = msg_ctx; | |
3325 | sconn->sock = sock_fd; | |
3326 | sconn->smb1.echo_handler.trusted_fd = -1; | |
3327 | sconn->smb1.echo_handler.socket_lock_fd = -1; | |
3328 | ||
3329 | if (!interactive) { | |
3330 | smbd_setup_sig_term_handler(sconn); | |
3331 | smbd_setup_sig_hup_handler(sconn); | |
3332 | ||
3333 | if (!serverid_register(messaging_server_id(msg_ctx), | |
3334 | FLAG_MSG_GENERAL|FLAG_MSG_SMBD | |
3335 | |FLAG_MSG_DBWRAP | |
3336 | |FLAG_MSG_PRINT_GENERAL)) { | |
3337 | exit_server_cleanly("Could not register myself in " | |
3338 | "serverid.tdb"); | |
3339 | } | |
3340 | } | |
3341 | ||
c318c941 | 3342 | if (lp_srv_maxprotocol() >= PROTOCOL_SMB2_02) { |
d28fa8fa | 3343 | /* |
15d6c707 | 3344 | * We're not making the decision here, |
d28fa8fa JA |
3345 | * we're just allowing the client |
3346 | * to decide between SMB1 and SMB2 | |
3347 | * with the first negprot | |
3348 | * packet. | |
3349 | */ | |
37d71a56 | 3350 | sconn->using_smb2 = true; |
688945a9 SM |
3351 | } |
3352 | ||
27f812f3 | 3353 | /* Ensure child is set to blocking mode */ |
68e86969 | 3354 | set_blocking(sconn->sock,True); |
27f812f3 | 3355 | |
68e86969 VL |
3356 | set_socket_options(sconn->sock, "SO_KEEPALIVE"); |
3357 | set_socket_options(sconn->sock, lp_socket_options()); | |
27f812f3 | 3358 | |
b764145a | 3359 | sa = (struct sockaddr *)(void *)&ss; |
db6d1c62 SM |
3360 | sa_socklen = sizeof(ss); |
3361 | ret = getpeername(sconn->sock, sa, &sa_socklen); | |
b764145a SM |
3362 | if (ret != 0) { |
3363 | int level = (errno == ENOTCONN)?2:0; | |
3364 | DEBUG(level,("getpeername() failed - %s\n", strerror(errno))); | |
3549425b | 3365 | exit_server_cleanly("getpeername() failed.\n"); |
b764145a | 3366 | } |
37d71a56 | 3367 | ret = tsocket_address_bsd_from_sockaddr(sconn, |
db6d1c62 | 3368 | sa, sa_socklen, |
b764145a SM |
3369 | &remote_address); |
3370 | if (ret != 0) { | |
3371 | DEBUG(0,("%s: tsocket_address_bsd_from_sockaddr remote failed - %s\n", | |
3372 | __location__, strerror(errno))); | |
3549425b | 3373 | exit_server_cleanly("tsocket_address_bsd_from_sockaddr remote failed.\n"); |
b764145a SM |
3374 | } |
3375 | ||
3376 | sa = (struct sockaddr *)(void *)&ss; | |
db6d1c62 SM |
3377 | sa_socklen = sizeof(ss); |
3378 | ret = getsockname(sconn->sock, sa, &sa_socklen); | |
b764145a SM |
3379 | if (ret != 0) { |
3380 | int level = (errno == ENOTCONN)?2:0; | |
3381 | DEBUG(level,("getsockname() failed - %s\n", strerror(errno))); | |
3549425b | 3382 | exit_server_cleanly("getsockname() failed.\n"); |
b764145a | 3383 | } |
37d71a56 | 3384 | ret = tsocket_address_bsd_from_sockaddr(sconn, |
db6d1c62 | 3385 | sa, sa_socklen, |
b764145a SM |
3386 | &local_address); |
3387 | if (ret != 0) { | |
3388 | DEBUG(0,("%s: tsocket_address_bsd_from_sockaddr remote failed - %s\n", | |
3389 | __location__, strerror(errno))); | |
3549425b | 3390 | exit_server_cleanly("tsocket_address_bsd_from_sockaddr remote failed.\n"); |
b764145a SM |
3391 | } |
3392 | ||
37d71a56 VL |
3393 | sconn->local_address = local_address; |
3394 | sconn->remote_address = remote_address; | |
b764145a | 3395 | |
3d7521c8 SM |
3396 | if (tsocket_address_is_inet(local_address, "ip")) { |
3397 | locaddr = tsocket_address_inet_addr_string( | |
3398 | sconn->local_address, | |
3399 | talloc_tos()); | |
3400 | if (locaddr == NULL) { | |
3401 | DEBUG(0,("%s: tsocket_address_inet_addr_string local failed - %s\n", | |
3402 | __location__, strerror(errno))); | |
3403 | exit_server_cleanly("tsocket_address_inet_addr_string local failed.\n"); | |
3404 | } | |
3405 | } else { | |
3406 | locaddr = "0.0.0.0"; | |
3407 | } | |
3408 | ||
b764145a SM |
3409 | if (tsocket_address_is_inet(remote_address, "ip")) { |
3410 | remaddr = tsocket_address_inet_addr_string( | |
37d71a56 | 3411 | sconn->remote_address, |
b764145a SM |
3412 | talloc_tos()); |
3413 | if (remaddr == NULL) { | |
ad0f765a AS |
3414 | DEBUG(0,("%s: tsocket_address_inet_addr_string remote failed - %s\n", |
3415 | __location__, strerror(errno))); | |
3416 | exit_server_cleanly("tsocket_address_inet_addr_string remote failed.\n"); | |
b764145a SM |
3417 | } |
3418 | } else { | |
3419 | remaddr = "0.0.0.0"; | |
3420 | } | |
3421 | ||
27f812f3 SM |
3422 | /* this is needed so that we get decent entries |
3423 | in smbstatus for port 445 connects */ | |
b764145a | 3424 | set_remote_machine_name(remaddr, false); |
03455519 | 3425 | reload_services(sconn, conn_snum_used, true); |
27f812f3 | 3426 | |
ac647d03 VL |
3427 | /* |
3428 | * Before the first packet, check the global hosts allow/ hosts deny | |
3429 | * parameters before doing any parsing of packets passed to us by the | |
3430 | * client. This prevents attacks on our parsing code from hosts not in | |
3431 | * the hosts allow list. | |
3432 | */ | |
3433 | ||
a513086c AS |
3434 | ret = get_remote_hostname(remote_address, |
3435 | &rhost, | |
3436 | talloc_tos()); | |
3437 | if (ret < 0) { | |
3438 | DEBUG(0,("%s: get_remote_hostname failed - %s\n", | |
3439 | __location__, strerror(errno))); | |
3440 | exit_server_cleanly("get_remote_hostname failed.\n"); | |
3441 | } | |
3442 | if (strequal(rhost, "UNKNOWN")) { | |
3443 | rhost = talloc_strdup(talloc_tos(), remaddr); | |
3444 | } | |
3445 | sconn->remote_hostname = talloc_move(sconn, &rhost); | |
3446 | ||
3d7521c8 SM |
3447 | sub_set_socket_ids(remaddr, |
3448 | sconn->remote_hostname, | |
3449 | locaddr); | |
3450 | ||
70c5bed4 | 3451 | if (!allow_access(lp_hostsdeny(-1), lp_hostsallow(-1), |
a513086c AS |
3452 | sconn->remote_hostname, |
3453 | remaddr)) { | |
ac647d03 VL |
3454 | /* |
3455 | * send a negative session response "not listening on calling | |
3456 | * name" | |
3457 | */ | |
3458 | unsigned char buf[5] = {0x83, 0, 0, 1, 0x81}; | |
b764145a SM |
3459 | DEBUG( 1, ("Connection denied from %s to %s\n", |
3460 | tsocket_address_string(remote_address, talloc_tos()), | |
3461 | tsocket_address_string(local_address, talloc_tos()))); | |
1808dd0a | 3462 | (void)srv_send_smb(sconn,(char *)buf, false, |
c16c90a1 | 3463 | 0, false, NULL); |
ac647d03 VL |
3464 | exit_server_cleanly("connection denied"); |
3465 | } | |
3466 | ||
b764145a SM |
3467 | DEBUG(10, ("Connection allowed from %s to %s\n", |
3468 | tsocket_address_string(remote_address, talloc_tos()), | |
3469 | tsocket_address_string(local_address, talloc_tos()))); | |
3470 | ||
c3638158 AB |
3471 | if (lp_preload_modules()) { |
3472 | smb_load_modules(lp_preload_modules()); | |
3473 | } | |
27f812f3 | 3474 | |
54c51a66 | 3475 | smb_perfcount_init(); |
3476 | ||
27f812f3 SM |
3477 | if (!init_account_policy()) { |
3478 | exit_server("Could not open account policy tdb.\n"); | |
3479 | } | |
3480 | ||
fe72740e RR |
3481 | if (*lp_rootdir(talloc_tos())) { |
3482 | if (chroot(lp_rootdir(talloc_tos())) != 0) { | |
3483 | DEBUG(0,("Failed to change root to %s\n", | |
3484 | lp_rootdir(talloc_tos()))); | |
f6821a15 JA |
3485 | exit_server("Failed to chroot()"); |
3486 | } | |
3487 | if (chdir("/") == -1) { | |
fe72740e | 3488 | DEBUG(0,("Failed to chdir to / on chroot to %s\n", lp_rootdir(talloc_tos()))); |
27f812f3 SM |
3489 | exit_server("Failed to chroot()"); |
3490 | } | |
fe72740e | 3491 | DEBUG(0,("Changed root to %s\n", lp_rootdir(talloc_tos()))); |
27f812f3 SM |
3492 | } |
3493 | ||
37d71a56 | 3494 | if (!srv_init_signing(sconn)) { |
c16c90a1 SM |
3495 | exit_server("Failed to init smb_signing"); |
3496 | } | |
3497 | ||
288a75d8 SM |
3498 | if (!file_init(sconn)) { |
3499 | exit_server("file_init() failed"); | |
3500 | } | |
3501 | ||
27f812f3 | 3502 | /* Setup oplocks */ |
21de6735 | 3503 | if (!init_oplocks(sconn)) |
27f812f3 SM |
3504 | exit_server("Failed to init oplocks"); |
3505 | ||
27f812f3 | 3506 | /* register our message handlers */ |
d492a437 | 3507 | messaging_register(sconn->msg_ctx, sconn, |
27f812f3 | 3508 | MSG_SMB_FORCE_TDIS, msg_force_tdis); |
4d44f879 | 3509 | messaging_register(sconn->msg_ctx, sconn, |
27f812f3 | 3510 | MSG_SMB_CLOSE_FILE, msg_close_file); |
e09c6755 | 3511 | messaging_register(sconn->msg_ctx, sconn, |
173ea716 | 3512 | MSG_SMB_FILE_RENAME, msg_file_was_renamed); |
27f812f3 | 3513 | |
715933a3 SM |
3514 | id_cache_register_msgs(sconn->msg_ctx); |
3515 | messaging_deregister(sconn->msg_ctx, ID_CACHE_KILL, NULL); | |
3516 | messaging_register(sconn->msg_ctx, sconn, | |
3517 | ID_CACHE_KILL, smbd_id_cache_kill); | |
3518 | ||
e412b8bf SM |
3519 | messaging_deregister(sconn->msg_ctx, |
3520 | MSG_SMB_CONF_UPDATED, sconn->ev_ctx); | |
3521 | messaging_register(sconn->msg_ctx, sconn, | |
3522 | MSG_SMB_CONF_UPDATED, smbd_conf_updated); | |
3523 | ||
5a4d6181 AS |
3524 | /* |
3525 | * Use the default MSG_DEBUG handler to avoid rebroadcasting | |
3526 | * MSGs to all child processes | |
3527 | */ | |
b71f2af1 | 3528 | messaging_deregister(sconn->msg_ctx, |
5a4d6181 | 3529 | MSG_DEBUG, NULL); |
b71f2af1 | 3530 | messaging_register(sconn->msg_ctx, NULL, |
5a4d6181 AS |
3531 | MSG_DEBUG, debug_message); |
3532 | ||
27f812f3 | 3533 | if ((lp_keepalive() != 0) |
dd3a9279 | 3534 | && !(event_add_idle(ev_ctx, NULL, |
27f812f3 SM |
3535 | timeval_set(lp_keepalive(), 0), |
3536 | "keepalive", keepalive_fn, | |
d911bd5c | 3537 | sconn))) { |
27f812f3 SM |
3538 | DEBUG(0, ("Could not add keepalive event\n")); |
3539 | exit(1); | |
3540 | } | |
3541 | ||
dd3a9279 | 3542 | if (!(event_add_idle(ev_ctx, NULL, |
27f812f3 | 3543 | timeval_set(IDLE_CLOSED_TIMEOUT, 0), |
37d71a56 | 3544 | "deadtime", deadtime_fn, sconn))) { |
27f812f3 SM |
3545 | DEBUG(0, ("Could not add deadtime event\n")); |
3546 | exit(1); | |
aeb798c3 | 3547 | } |
27f812f3 | 3548 | |
dd3a9279 | 3549 | if (!(event_add_idle(ev_ctx, NULL, |
0b188e77 | 3550 | timeval_set(SMBD_HOUSEKEEPING_INTERVAL, 0), |
babfe237 | 3551 | "housekeeping", housekeeping_fn, sconn))) { |
27f812f3 SM |
3552 | DEBUG(0, ("Could not add housekeeping event\n")); |
3553 | exit(1); | |
3554 | } | |
3555 | ||
3556 | #ifdef CLUSTER_SUPPORT | |
3557 | ||
3558 | if (lp_clustering()) { | |
3559 | /* | |
3560 | * We need to tell ctdb about our client's TCP | |
3561 | * connection, so that for failover ctdbd can send | |
3562 | * tickle acks, triggering a reconnection by the | |
3563 | * client. | |
3564 | */ | |
3565 | ||
3566 | struct sockaddr_storage srv, clnt; | |
3567 | ||
f83e7d8f | 3568 | if (client_get_tcp_info(sconn->sock, &srv, &clnt) == 0) { |
27f812f3 | 3569 | NTSTATUS status; |
744cc264 | 3570 | status = smbd_register_ips(sconn, &srv, &clnt); |
27f812f3 SM |
3571 | if (!NT_STATUS_IS_OK(status)) { |
3572 | DEBUG(0, ("ctdbd_register_ips failed: %s\n", | |
3573 | nt_errstr(status))); | |
3574 | } | |
3575 | } else | |
3576 | { | |
3577 | DEBUG(0,("Unable to get tcp info for " | |
3578 | "CTDB_CONTROL_TCP_CLIENT: %s\n", | |
3579 | strerror(errno))); | |
3580 | } | |
3581 | } | |
3582 | ||
3583 | #endif | |
3584 | ||
37d71a56 | 3585 | sconn->nbt.got_session = false; |
f554af18 | 3586 | |
9f4b6fa0 | 3587 | sconn->smb1.negprot.max_recv = MIN(lp_max_xmit(),BUFFER_SIZE); |
27f812f3 | 3588 | |
37d71a56 VL |
3589 | sconn->smb1.sessions.done_sesssetup = false; |
3590 | sconn->smb1.sessions.max_send = BUFFER_SIZE; | |
3591 | sconn->smb1.sessions.last_session_tag = UID_FIELD_INVALID; | |
356f0336 | 3592 | |
37d71a56 | 3593 | if (!init_dptrs(sconn)) { |
59c3f5e3 SM |
3594 | exit_server("init_dptrs() failed"); |
3595 | } | |
c8620180 | 3596 | |
dd3a9279 | 3597 | sconn->smb1.fde = event_add_fd(ev_ctx, |
37d71a56 | 3598 | sconn, |
68e86969 | 3599 | sconn->sock, |
ebc860eb SM |
3600 | EVENT_FD_READ, |
3601 | smbd_server_connection_handler, | |
37d71a56 VL |
3602 | sconn); |
3603 | if (!sconn->smb1.fde) { | |
aeb798c3 SM |
3604 | exit_server("failed to create smbd_server_connection fde"); |
3605 | } | |
3606 | ||
b3235d48 SM |
3607 | sconn->conn->local_address = sconn->local_address; |
3608 | sconn->conn->remote_address = sconn->remote_address; | |
3609 | sconn->conn->remote_hostname = sconn->remote_hostname; | |
3610 | sconn->conn->protocol = PROTOCOL_NONE; | |
3611 | ||
27f812f3 SM |
3612 | TALLOC_FREE(frame); |
3613 | ||
cd260391 | 3614 | tevent_set_trace_callback(ev_ctx, smbd_tevent_trace_callback, conn); |
fc96488c | 3615 | |
b2d01bd2 | 3616 | while (True) { |
27f812f3 | 3617 | frame = talloc_stackframe_pool(8192); |
dc76502c | 3618 | |
c3250149 | 3619 | errno = 0; |
ed85e9fe JA |
3620 | if (tevent_loop_once(ev_ctx) == -1) { |
3621 | if (errno != EINTR) { | |
3622 | DEBUG(3, ("tevent_loop_once failed: %s," | |
3623 | " exiting\n", strerror(errno) )); | |
3624 | break; | |
3625 | } | |
b2d01bd2 AT |
3626 | } |
3627 | ||
929e1d99 | 3628 | TALLOC_FREE(frame); |
b2d01bd2 | 3629 | } |
27f812f3 SM |
3630 | |
3631 | exit_server_cleanly(NULL); | |
c3effa8b | 3632 | } |
d94e9c80 VL |
3633 | |
3634 | bool req_is_in_chain(struct smb_request *req) | |
3635 | { | |
4f41be35 | 3636 | if (req->vwv != (const uint16_t *)(req->inbuf+smb_vwv)) { |
d94e9c80 VL |
3637 | /* |
3638 | * We're right now handling a subsequent request, so we must | |
3639 | * be in a chain | |
3640 | */ | |
3641 | return true; | |
3642 | } | |
3643 | ||
3644 | if (!is_andx_req(req->cmd)) { | |
3645 | return false; | |
3646 | } | |
3647 | ||
3648 | if (req->wct < 2) { | |
3649 | /* | |
3650 | * Okay, an illegal request, but definitely not chained :-) | |
3651 | */ | |
3652 | return false; | |
3653 | } | |
3654 | ||
3655 | return (CVAL(req->vwv+0, 0) != 0xFF); | |
3656 | } |