source: branches/samba-3.0/source/smbd/negprot.c

Last change on this file was 105, checked in by Paul Smedley, 18 years ago

Update source to 3.0.27a
File size: 19.7 KB
RevLine 
[22]1/*
2 Unix SMB/CIFS implementation.
3 negprot reply code
4 Copyright (C) Andrew Tridgell 1992-1998
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19*/
20
21#include "includes.h"
22
23extern fstring remote_proto;
24extern enum protocol_types Protocol;
25extern int max_recv;
26
27BOOL global_encrypted_passwords_negotiated = False;
28BOOL global_spnego_negotiated = False;
29struct auth_context *negprot_global_auth_context = NULL;
30
31static void get_challenge(char buff[8])
32{
33 NTSTATUS nt_status;
34 const uint8 *cryptkey;
35
36 /* We might be called more than once, multiple negprots are
37 * permitted */
38 if (negprot_global_auth_context) {
39 DEBUG(3, ("get challenge: is this a secondary negprot? negprot_global_auth_context is non-NULL!\n"));
40 (negprot_global_auth_context->free)(&negprot_global_auth_context);
41 }
42
43 DEBUG(10, ("get challenge: creating negprot_global_auth_context\n"));
44 if (!NT_STATUS_IS_OK(nt_status = make_auth_context_subsystem(&negprot_global_auth_context))) {
45 DEBUG(0, ("make_auth_context_subsystem returned %s", nt_errstr(nt_status)));
46 smb_panic("cannot make_negprot_global_auth_context!\n");
47 }
48 DEBUG(10, ("get challenge: getting challenge\n"));
49 cryptkey = negprot_global_auth_context->get_ntlm_challenge(negprot_global_auth_context);
50 memcpy(buff, cryptkey, 8);
51}
52
53/****************************************************************************
54 Reply for the core protocol.
55****************************************************************************/
56
57static int reply_corep(char *inbuf, char *outbuf)
58{
59 int outsize = set_message(outbuf,1,0,True);
60
61 Protocol = PROTOCOL_CORE;
62
63 return outsize;
64}
65
66/****************************************************************************
67 Reply for the coreplus protocol.
68****************************************************************************/
69
70static int reply_coreplus(char *inbuf, char *outbuf)
71{
72 int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
73 int outsize = set_message(outbuf,13,0,True);
74 SSVAL(outbuf,smb_vwv5,raw); /* tell redirector we support
75 readbraw and writebraw (possibly) */
76 /* Reply, SMBlockread, SMBwritelock supported. */
77 SCVAL(outbuf,smb_flg,FLAG_REPLY|FLAG_SUPPORT_LOCKREAD);
78 SSVAL(outbuf,smb_vwv1,0x1); /* user level security, don't encrypt */
79
80 Protocol = PROTOCOL_COREPLUS;
81
82 return outsize;
83}
84
85/****************************************************************************
86 Reply for the lanman 1.0 protocol.
87****************************************************************************/
88
89static int reply_lanman1(char *inbuf, char *outbuf)
90{
91 int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
92 int secword=0;
93 time_t t = time(NULL);
94
95 global_encrypted_passwords_negotiated = lp_encrypted_passwords();
96
97 if (lp_security()>=SEC_USER)
98 secword |= NEGOTIATE_SECURITY_USER_LEVEL;
99 if (global_encrypted_passwords_negotiated)
100 secword |= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE;
101
102 set_message(outbuf,13,global_encrypted_passwords_negotiated?8:0,True);
103 SSVAL(outbuf,smb_vwv1,secword);
104 /* Create a token value and add it to the outgoing packet. */
105 if (global_encrypted_passwords_negotiated) {
106 get_challenge(smb_buf(outbuf));
107 SSVAL(outbuf,smb_vwv11, 8);
108 }
109
110 Protocol = PROTOCOL_LANMAN1;
111
112 /* Reply, SMBlockread, SMBwritelock supported. */
113 SCVAL(outbuf,smb_flg,FLAG_REPLY|FLAG_SUPPORT_LOCKREAD);
114 SSVAL(outbuf,smb_vwv2,max_recv);
115 SSVAL(outbuf,smb_vwv3,lp_maxmux()); /* maxmux */
116 SSVAL(outbuf,smb_vwv4,1);
117 SSVAL(outbuf,smb_vwv5,raw); /* tell redirector we support
118 readbraw writebraw (possibly) */
119 SIVAL(outbuf,smb_vwv6,sys_getpid());
120 SSVAL(outbuf,smb_vwv10, set_server_zone_offset(t)/60);
121
122 srv_put_dos_date(outbuf,smb_vwv8,t);
123
124 return (smb_len(outbuf)+4);
125}
126
127/****************************************************************************
128 Reply for the lanman 2.0 protocol.
129****************************************************************************/
130
131static int reply_lanman2(char *inbuf, char *outbuf)
132{
133 int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
134 int secword=0;
135 time_t t = time(NULL);
136
137 global_encrypted_passwords_negotiated = lp_encrypted_passwords();
138
139 if (lp_security()>=SEC_USER)
140 secword |= NEGOTIATE_SECURITY_USER_LEVEL;
141 if (global_encrypted_passwords_negotiated)
142 secword |= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE;
143
144 set_message(outbuf,13,global_encrypted_passwords_negotiated?8:0,True);
145 SSVAL(outbuf,smb_vwv1,secword);
146 SIVAL(outbuf,smb_vwv6,sys_getpid());
147
148 /* Create a token value and add it to the outgoing packet. */
149 if (global_encrypted_passwords_negotiated) {
150 get_challenge(smb_buf(outbuf));
151 SSVAL(outbuf,smb_vwv11, 8);
152 }
153
154 Protocol = PROTOCOL_LANMAN2;
155
156 /* Reply, SMBlockread, SMBwritelock supported. */
157 SCVAL(outbuf,smb_flg,FLAG_REPLY|FLAG_SUPPORT_LOCKREAD);
158 SSVAL(outbuf,smb_vwv2,max_recv);
159 SSVAL(outbuf,smb_vwv3,lp_maxmux());
160 SSVAL(outbuf,smb_vwv4,1);
161 SSVAL(outbuf,smb_vwv5,raw); /* readbraw and/or writebraw */
162 SSVAL(outbuf,smb_vwv10, set_server_zone_offset(t)/60);
163 srv_put_dos_date(outbuf,smb_vwv8,t);
164
165 return (smb_len(outbuf)+4);
166}
167
168/****************************************************************************
169 Generate the spnego negprot reply blob. Return the number of bytes used.
170****************************************************************************/
171
172static DATA_BLOB negprot_spnego(void)
173{
174 DATA_BLOB blob;
175 nstring dos_name;
176 fstring unix_name;
177#ifdef DEVELOPER
178 size_t slen;
179#endif
180 char guid[17];
181 const char *OIDs_krb5[] = {OID_KERBEROS5,
182 OID_KERBEROS5_OLD,
183 OID_NTLMSSP,
184 NULL};
185 const char *OIDs_plain[] = {OID_NTLMSSP, NULL};
186
187 global_spnego_negotiated = True;
188
189 memset(guid, '\0', sizeof(guid));
190
191 safe_strcpy(unix_name, global_myname(), sizeof(unix_name)-1);
192 strlower_m(unix_name);
193 push_ascii_nstring(dos_name, unix_name);
194 safe_strcpy(guid, dos_name, sizeof(guid)-1);
195
196#ifdef DEVELOPER
197 /* Fix valgrind 'uninitialized bytes' issue. */
198 slen = strlen(dos_name);
199 if (slen < sizeof(guid)) {
200 memset(guid+slen, '\0', sizeof(guid) - slen);
201 }
202#endif
203
204 /* strangely enough, NT does not sent the single OID NTLMSSP when
205 not a ADS member, it sends no OIDs at all
206
207 OLD COMMENT : "we can't do this until we teach our sesssion setup parser to know
208 about raw NTLMSSP (clients send no ASN.1 wrapping if we do this)"
209
210 Our sessionsetup code now handles raw NTLMSSP connects, so we can go
211 back to doing what W2K3 does here. This is needed to make PocketPC 2003
212 CIFS connections work with SPNEGO. See bugzilla bugs #1828 and #3133
213 for details. JRA.
214
215 */
216
217 if (lp_security() != SEC_ADS && !lp_use_kerberos_keytab()) {
218#if 0
219 /* Code for PocketPC client */
220 blob = data_blob(guid, 16);
221#else
222 /* Code for standalone WXP client */
223 blob = spnego_gen_negTokenInit(guid, OIDs_plain, "NONE");
224#endif
225 } else {
226 fstring myname;
227 char *host_princ_s = NULL;
228 name_to_fqdn(myname, global_myname());
229 strlower_m(myname);
230 asprintf(&host_princ_s, "cifs/%s@%s", myname, lp_realm());
231 blob = spnego_gen_negTokenInit(guid, OIDs_krb5, host_princ_s);
232 SAFE_FREE(host_princ_s);
233 }
234
235 return blob;
236}
237
238/****************************************************************************
239 Reply for the nt protocol.
240****************************************************************************/
241
242static int reply_nt1(char *inbuf, char *outbuf)
243{
244 /* dual names + lock_and_read + nt SMBs + remote API calls */
245 int capabilities = CAP_NT_FIND|CAP_LOCK_AND_READ|
246 CAP_LEVEL_II_OPLOCKS;
247
248 int secword=0;
249 char *p, *q;
250 BOOL negotiate_spnego = False;
251 time_t t = time(NULL);
252
253 global_encrypted_passwords_negotiated = lp_encrypted_passwords();
254
255 /* Check the flags field to see if this is Vista.
256 WinXP sets it and Vista does not. But we have to
257 distinguish from NT which doesn't set it either. */
258
259 if ( (SVAL(inbuf, smb_flg2) & FLAGS2_EXTENDED_SECURITY) &&
260 ((SVAL(inbuf, smb_flg2) & FLAGS2_UNKNOWN_BIT4) == 0) )
261 {
262 if (get_remote_arch() != RA_SAMBA) {
263 set_remote_arch( RA_VISTA );
264 }
265 }
266
267 /* do spnego in user level security if the client
268 supports it and we can do encrypted passwords */
269
270 if (global_encrypted_passwords_negotiated &&
271 (lp_security() != SEC_SHARE) &&
272 lp_use_spnego() &&
273 (SVAL(inbuf, smb_flg2) & FLAGS2_EXTENDED_SECURITY)) {
274 negotiate_spnego = True;
275 capabilities |= CAP_EXTENDED_SECURITY;
276 add_to_common_flags2(FLAGS2_EXTENDED_SECURITY);
277 /* Ensure FLAGS2_EXTENDED_SECURITY gets set in this reply (already
278 partially constructed. */
279 SSVAL(outbuf,smb_flg2, SVAL(outbuf,smb_flg2) | FLAGS2_EXTENDED_SECURITY);
280 }
281
282 capabilities |= CAP_NT_SMBS|CAP_RPC_REMOTE_APIS|CAP_UNICODE;
283
284 if (lp_unix_extensions()) {
285 capabilities |= CAP_UNIX;
286 }
287
288 if (lp_large_readwrite() && (SMB_OFF_T_BITS == 64))
289 capabilities |= CAP_LARGE_READX|CAP_LARGE_WRITEX|CAP_W2K_SMBS;
290
291 if (SMB_OFF_T_BITS == 64)
292 capabilities |= CAP_LARGE_FILES;
293
294 if (lp_readraw() && lp_writeraw())
295 capabilities |= CAP_RAW_MODE;
296
297 if (lp_nt_status_support())
298 capabilities |= CAP_STATUS32;
299
300 if (lp_host_msdfs())
301 capabilities |= CAP_DFS;
302
303 if (lp_security() >= SEC_USER)
304 secword |= NEGOTIATE_SECURITY_USER_LEVEL;
305 if (global_encrypted_passwords_negotiated)
306 secword |= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE;
307
308 if (lp_server_signing()) {
309 if (lp_security() >= SEC_USER) {
310 secword |= NEGOTIATE_SECURITY_SIGNATURES_ENABLED;
311 /* No raw mode with smb signing. */
312 capabilities &= ~CAP_RAW_MODE;
313 if (lp_server_signing() == Required)
314 secword |=NEGOTIATE_SECURITY_SIGNATURES_REQUIRED;
315 srv_set_signing_negotiated();
316 } else {
317 DEBUG(0,("reply_nt1: smb signing is incompatible with share level security !\n"));
318 if (lp_server_signing() == Required) {
319 exit_server_cleanly("reply_nt1: smb signing required and share level security selected.");
320 }
321 }
322 }
323
324 set_message(outbuf,17,0,True);
325
326 SCVAL(outbuf,smb_vwv1,secword);
327
328 Protocol = PROTOCOL_NT1;
329
330 SSVAL(outbuf,smb_vwv1+1,lp_maxmux()); /* maxmpx */
331 SSVAL(outbuf,smb_vwv2+1,1); /* num vcs */
332 SIVAL(outbuf,smb_vwv3+1,max_recv); /* max buffer. LOTS! */
333 SIVAL(outbuf,smb_vwv5+1,0x10000); /* raw size. full 64k */
334 SIVAL(outbuf,smb_vwv7+1,sys_getpid()); /* session key */
335 SIVAL(outbuf,smb_vwv9+1,capabilities); /* capabilities */
336 put_long_date(outbuf+smb_vwv11+1,t);
337 SSVALS(outbuf,smb_vwv15+1,set_server_zone_offset(t)/60);
338
339 p = q = smb_buf(outbuf);
340 if (!negotiate_spnego) {
341 /* Create a token value and add it to the outgoing packet. */
342 if (global_encrypted_passwords_negotiated) {
343 /* note that we do not send a challenge at all if
344 we are using plaintext */
345 get_challenge(p);
346 SCVAL(outbuf,smb_vwv16+1,8);
347 p += 8;
348 }
[105]349 p += srvstr_push(outbuf, p, lp_workgroup(), BUFFER_SIZE - (p-outbuf),
[22]350 STR_UNICODE|STR_TERMINATE|STR_NOALIGN);
351 DEBUG(3,("not using SPNEGO\n"));
352 } else {
353 DATA_BLOB spnego_blob = negprot_spnego();
354
355 if (spnego_blob.data == NULL) {
356 return ERROR_NT(NT_STATUS_NO_MEMORY);
357 }
358
359 memcpy(p, spnego_blob.data, spnego_blob.length);
360 p += spnego_blob.length;
361 data_blob_free(&spnego_blob);
362
363 SCVAL(outbuf,smb_vwv16+1, 0);
364 DEBUG(3,("using SPNEGO\n"));
365 }
366
367 SSVAL(outbuf,smb_vwv17, p - q); /* length of challenge+domain strings */
368 set_message_end(outbuf, p);
369
370 return (smb_len(outbuf)+4);
371}
372
373/* these are the protocol lists used for auto architecture detection:
374
375WinNT 3.51:
376protocol [PC NETWORK PROGRAM 1.0]
377protocol [XENIX CORE]
378protocol [MICROSOFT NETWORKS 1.03]
379protocol [LANMAN1.0]
380protocol [Windows for Workgroups 3.1a]
381protocol [LM1.2X002]
382protocol [LANMAN2.1]
383protocol [NT LM 0.12]
384
385Win95:
386protocol [PC NETWORK PROGRAM 1.0]
387protocol [XENIX CORE]
388protocol [MICROSOFT NETWORKS 1.03]
389protocol [LANMAN1.0]
390protocol [Windows for Workgroups 3.1a]
391protocol [LM1.2X002]
392protocol [LANMAN2.1]
393protocol [NT LM 0.12]
394
395Win2K:
396protocol [PC NETWORK PROGRAM 1.0]
397protocol [LANMAN1.0]
398protocol [Windows for Workgroups 3.1a]
399protocol [LM1.2X002]
400protocol [LANMAN2.1]
401protocol [NT LM 0.12]
402
403Vista:
404protocol [PC NETWORK PROGRAM 1.0]
405protocol [LANMAN1.0]
406protocol [Windows for Workgroups 3.1a]
407protocol [LM1.2X002]
408protocol [LANMAN2.1]
409protocol [NT LM 0.12]
410protocol [SMB 2.001]
411
412OS/2:
413protocol [PC NETWORK PROGRAM 1.0]
414protocol [XENIX CORE]
415protocol [LANMAN1.0]
416protocol [LM1.2X002]
417protocol [LANMAN2.1]
418*/
419
420/*
421 * Modified to recognize the architecture of the remote machine better.
422 *
423 * This appears to be the matrix of which protocol is used by which
424 * MS product.
425 Protocol WfWg Win95 WinNT Win2K OS/2 Vista
426 PC NETWORK PROGRAM 1.0 1 1 1 1 1 1
427 XENIX CORE 2 2
428 MICROSOFT NETWORKS 3.0 2 2
429 DOS LM1.2X002 3 3
430 MICROSOFT NETWORKS 1.03 3
431 DOS LANMAN2.1 4 4
432 LANMAN1.0 4 2 3 2
433 Windows for Workgroups 3.1a 5 5 5 3 3
434 LM1.2X002 6 4 4 4
435 LANMAN2.1 7 5 5 5
436 NT LM 0.12 6 8 6 6
437 SMB 2.001 7
438 *
439 * tim@fsg.com 09/29/95
440 * Win2K added by matty 17/7/99
441 */
442
443#define ARCH_WFWG 0x3 /* This is a fudge because WfWg is like Win95 */
444#define ARCH_WIN95 0x2
445#define ARCH_WINNT 0x4
446#define ARCH_WIN2K 0xC /* Win2K is like NT */
447#define ARCH_OS2 0x14 /* Again OS/2 is like NT */
448#define ARCH_SAMBA 0x20
449#define ARCH_CIFSFS 0x40
450#define ARCH_VISTA 0x8C /* Vista is like XP/2K */
451
452#define ARCH_ALL 0x7F
453
454/* List of supported protocols, most desired first */
455static const struct {
456 const char *proto_name;
457 const char *short_name;
458 int (*proto_reply_fn)(char *, char *);
459 int protocol_level;
460} supported_protocols[] = {
461 {"NT LANMAN 1.0", "NT1", reply_nt1, PROTOCOL_NT1},
462 {"NT LM 0.12", "NT1", reply_nt1, PROTOCOL_NT1},
463 {"POSIX 2", "NT1", reply_nt1, PROTOCOL_NT1},
464 {"LANMAN2.1", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
465 {"LM1.2X002", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
466 {"Samba", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
467 {"DOS LM1.2X002", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
468 {"LANMAN1.0", "LANMAN1", reply_lanman1, PROTOCOL_LANMAN1},
469 {"MICROSOFT NETWORKS 3.0", "LANMAN1", reply_lanman1, PROTOCOL_LANMAN1},
470 {"MICROSOFT NETWORKS 1.03", "COREPLUS", reply_coreplus, PROTOCOL_COREPLUS},
471 {"PC NETWORK PROGRAM 1.0", "CORE", reply_corep, PROTOCOL_CORE},
472 {NULL,NULL,NULL,0},
473};
474
475/****************************************************************************
476 Reply to a negprot.
477 conn POINTER CAN BE NULL HERE !
478****************************************************************************/
479
480int reply_negprot(connection_struct *conn,
481 char *inbuf,char *outbuf, int dum_size,
482 int dum_buffsize)
483{
484 int outsize = set_message(outbuf,1,0,True);
485 int Index=0;
486 int choice= -1;
487 int protocol;
488 char *p;
489 int bcc = SVAL(smb_buf(inbuf),-2);
490 int arch = ARCH_ALL;
491
492 static BOOL done_negprot = False;
493
494 START_PROFILE(SMBnegprot);
495
496 if (done_negprot) {
497 END_PROFILE(SMBnegprot);
498 exit_server_cleanly("multiple negprot's are not permitted");
499 }
500 done_negprot = True;
501
502 p = smb_buf(inbuf)+1;
503 while (p < (smb_buf(inbuf) + bcc)) {
504 Index++;
505 DEBUG(3,("Requested protocol [%s]\n",p));
506 if (strcsequal(p,"Windows for Workgroups 3.1a"))
507 arch &= ( ARCH_WFWG | ARCH_WIN95 | ARCH_WINNT | ARCH_WIN2K );
508 else if (strcsequal(p,"DOS LM1.2X002"))
509 arch &= ( ARCH_WFWG | ARCH_WIN95 );
510 else if (strcsequal(p,"DOS LANMAN2.1"))
511 arch &= ( ARCH_WFWG | ARCH_WIN95 );
512 else if (strcsequal(p,"NT LM 0.12"))
513 arch &= ( ARCH_WIN95 | ARCH_WINNT | ARCH_WIN2K | ARCH_CIFSFS);
514 else if (strcsequal(p,"SMB 2.001"))
515 arch = ARCH_VISTA;
516 else if (strcsequal(p,"LANMAN2.1"))
517 arch &= ( ARCH_WINNT | ARCH_WIN2K | ARCH_OS2 );
518 else if (strcsequal(p,"LM1.2X002"))
519 arch &= ( ARCH_WINNT | ARCH_WIN2K | ARCH_OS2 );
520 else if (strcsequal(p,"MICROSOFT NETWORKS 1.03"))
521 arch &= ARCH_WINNT;
522 else if (strcsequal(p,"XENIX CORE"))
523 arch &= ( ARCH_WINNT | ARCH_OS2 );
524 else if (strcsequal(p,"Samba")) {
525 arch = ARCH_SAMBA;
526 break;
527 } else if (strcsequal(p,"POSIX 2")) {
528 arch = ARCH_CIFSFS;
529 break;
530 }
531
532 p += strlen(p) + 2;
533 }
534
535 /* CIFSFS can send one arch only, NT LM 0.12. */
536 if (Index == 1 && (arch & ARCH_CIFSFS)) {
537 arch = ARCH_CIFSFS;
538 }
539
540 switch ( arch ) {
541 case ARCH_CIFSFS:
542 set_remote_arch(RA_CIFSFS);
543 break;
544 case ARCH_SAMBA:
545 set_remote_arch(RA_SAMBA);
546 break;
547 case ARCH_WFWG:
548 set_remote_arch(RA_WFWG);
549 break;
550 case ARCH_WIN95:
551 set_remote_arch(RA_WIN95);
552 break;
553 case ARCH_WINNT:
554 if(SVAL(inbuf,smb_flg2)==FLAGS2_WIN2K_SIGNATURE)
555 set_remote_arch(RA_WIN2K);
556 else
557 set_remote_arch(RA_WINNT);
558 break;
559 case ARCH_WIN2K:
560 /* Vista may have been set in the negprot so don't
561 override it here */
562 if ( get_remote_arch() != RA_VISTA )
563 set_remote_arch(RA_WIN2K);
564 break;
565 case ARCH_VISTA:
566 set_remote_arch(RA_VISTA);
567 break;
568 case ARCH_OS2:
569 set_remote_arch(RA_OS2);
570 break;
571 default:
572 set_remote_arch(RA_UNKNOWN);
573 break;
574 }
575
576 /* possibly reload - change of architecture */
577 reload_services(True);
578
579 /* moved from the netbios session setup code since we don't have that
580 when the client connects to port 445. Of course there is a small
581 window where we are listening to messages -- jerry */
582
583 claim_connection(NULL,"",0,True,FLAG_MSG_GENERAL|FLAG_MSG_SMBD|FLAG_MSG_PRINT_GENERAL);
584
585 /* Check for protocols, most desirable first */
586 for (protocol = 0; supported_protocols[protocol].proto_name; protocol++) {
587 p = smb_buf(inbuf)+1;
588 Index = 0;
589 if ((supported_protocols[protocol].protocol_level <= lp_maxprotocol()) &&
590 (supported_protocols[protocol].protocol_level >= lp_minprotocol()))
591 while (p < (smb_buf(inbuf) + bcc)) {
592 if (strequal(p,supported_protocols[protocol].proto_name))
593 choice = Index;
594 Index++;
595 p += strlen(p) + 2;
596 }
597 if(choice != -1)
598 break;
599 }
600
601 SSVAL(outbuf,smb_vwv0,choice);
602 if(choice != -1) {
603 fstrcpy(remote_proto,supported_protocols[protocol].short_name);
604 reload_services(True);
605 outsize = supported_protocols[protocol].proto_reply_fn(inbuf, outbuf);
606 DEBUG(3,("Selected protocol %s\n",supported_protocols[protocol].proto_name));
607 } else {
608 DEBUG(0,("No protocol supported !\n"));
609 }
610 SSVAL(outbuf,smb_vwv0,choice);
611
612 DEBUG( 5, ( "negprot index=%d\n", choice ) );
613
614 if ((lp_server_signing() == Required) && (Protocol < PROTOCOL_NT1)) {
615 exit_server_cleanly("SMB signing is required and "
616 "client negotiated a downlevel protocol");
617 }
618
619 END_PROFILE(SMBnegprot);
620 return(outsize);
621}
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