xref: /dragonfly/sys/netproto/smb/smb_subr.c (revision b40e316c) 
1 /*
2  * Copyright (c) 2000-2001 Boris Popov
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *    This product includes software developed by Boris Popov.
16  * 4. Neither the name of the author nor the names of any co-contributors
17  *    may be used to endorse or promote products derived from this software
18  *    without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  *
32  * $FreeBSD: src/sys/netsmb/smb_subr.c,v 1.1.2.2 2001/09/03 08:55:11 bp Exp $
33  * $DragonFly: src/sys/netproto/smb/smb_subr.c,v 1.13 2005/01/06 22:31:16 dillon Exp $
34  */
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/kthread.h>
39 #include <sys/malloc.h>
40 #include <sys/mbuf.h>
41 #include <sys/proc.h>
42 #include <sys/lock.h>
43 #include <sys/resourcevar.h>
44 #include <sys/sysctl.h>
45 #include <sys/socket.h>
46 #include <sys/signalvar.h>
47 #include <sys/wait.h>
48 #include <sys/unistd.h>
49 
50 #include <machine/stdarg.h>
51 
52 #include <sys/iconv.h>
53 
54 #include "smb.h"
55 #include "smb_conn.h"
56 #include "smb_rq.h"
57 #include "smb_subr.h"
58 
59 MALLOC_DEFINE(M_SMBDATA, "SMBDATA", "Misc netsmb data");
60 MALLOC_DEFINE(M_SMBSTR, "SMBSTR", "netsmb string data");
61 MALLOC_DEFINE(M_SMBTEMP, "SMBTEMP", "Temp netsmb data");
62 
63 smb_unichar smb_unieol = 0;
64 
65 void
66 smb_makescred(struct smb_cred *scred, struct thread *td, struct ucred *cred)
67 {
68 	scred->scr_td = td;
69 	if (td && td->td_proc) {
70 		scred->scr_cred = cred ? cred : td->td_proc->p_ucred;
71 	} else {
72 		scred->scr_cred = cred ? cred : NULL;
73 	}
74 }
75 
76 int
77 smb_proc_intr(struct thread *td)
78 {
79 	sigset_t tmpset;
80 	struct proc *p;
81 
82 	if ((p = td->td_proc) == NULL)
83 		return 0;
84 	tmpset = p->p_siglist;
85 	SIGSETNAND(tmpset, p->p_sigmask);
86 	SIGSETNAND(tmpset, p->p_sigignore);
87 	if (SIGNOTEMPTY(p->p_siglist) && SMB_SIGMASK(tmpset))
88                 return EINTR;
89 	return 0;
90 }
91 
92 char *
93 smb_strdup(const char *s)
94 {
95 	char *p;
96 	int len;
97 
98 	len = s ? strlen(s) + 1 : 1;
99 	p = malloc(len, M_SMBSTR, M_WAITOK);
100 	if (s)
101 		bcopy(s, p, len);
102 	else
103 		*p = 0;
104 	return p;
105 }
106 
107 /*
108  * duplicate string from a user space.
109  */
110 char *
111 smb_strdupin(char *s, int maxlen)
112 {
113 	char *p, bt;
114 	int len = 0;
115 
116 	for (p = s; ;p++) {
117 		if (copyin(p, &bt, 1))
118 			return NULL;
119 		len++;
120 		if (maxlen && len > maxlen)
121 			return NULL;
122 		if (bt == 0)
123 			break;
124 	}
125 	p = malloc(len, M_SMBSTR, M_WAITOK);
126 	copyin(s, p, len);
127 	return p;
128 }
129 
130 /*
131  * duplicate memory block from a user space.
132  */
133 void *
134 smb_memdupin(void *umem, int len)
135 {
136 	char *p;
137 
138 	if (len > 8 * 1024)
139 		return NULL;
140 	p = malloc(len, M_SMBSTR, M_WAITOK);
141 	if (copyin(umem, p, len) == 0)
142 		return p;
143 	free(p, M_SMBSTR);
144 	return NULL;
145 }
146 
147 /*
148  * duplicate memory block in the kernel space.
149  */
150 void *
151 smb_memdup(const void *umem, int len)
152 {
153 	char *p;
154 
155 	if (len > 8 * 1024)
156 		return NULL;
157 	p = malloc(len, M_SMBSTR, M_WAITOK);
158 	if (p == NULL)
159 		return NULL;
160 	bcopy(umem, p, len);
161 	return p;
162 }
163 
164 void
165 smb_strfree(char *s)
166 {
167 	free(s, M_SMBSTR);
168 }
169 
170 void
171 smb_memfree(void *s)
172 {
173 	free(s, M_SMBSTR);
174 }
175 
176 void *
177 smb_zmalloc(unsigned long size, struct malloc_type *type, int flags)
178 {
179 
180 	return malloc(size, type, flags | M_ZERO);
181 }
182 
183 void
184 smb_strtouni(u_int16_t *dst, const char *src)
185 {
186 	while (*src) {
187 		*dst++ = htoles(*src++);
188 	}
189 	*dst = 0;
190 }
191 
192 #ifdef SMB_SOCKETDATA_DEBUG
193 void
194 m_dumpm(struct mbuf *m) {
195 	char *p;
196 	int len;
197 	printf("d=");
198 	while(m) {
199 		p=mtod(m,char *);
200 		len=m->m_len;
201 		printf("(%d)",len);
202 		while(len--){
203 			printf("%02x ",((int)*(p++)) & 0xff);
204 		}
205 		m=m->m_next;
206 	};
207 	printf("\n");
208 }
209 #endif
210 
211 int
212 smb_maperror(int eclass, int eno)
213 {
214 	if (eclass == 0 && eno == 0)
215 		return 0;
216 	switch (eclass) {
217 	    case ERRDOS:
218 		switch (eno) {
219 		    case ERRbadfunc:
220 		    case ERRbadmcb:
221 		    case ERRbadenv:
222 		    case ERRbadformat:
223 		    case ERRrmuns:
224 			return EINVAL;
225 		    case ERRbadfile:
226 		    case ERRbadpath:
227 		    case ERRremcd:
228 		    case 66:		/* nt returns it when share not available */
229 		    case 67:		/* observed from nt4sp6 when sharename wrong */
230 			return ENOENT;
231 		    case ERRnofids:
232 			return EMFILE;
233 		    case ERRnoaccess:
234 		    case ERRbadshare:
235 			return EACCES;
236 		    case ERRbadfid:
237 			return EBADF;
238 		    case ERRnomem:
239 			return ENOMEM;	/* actually remote no mem... */
240 		    case ERRbadmem:
241 			return EFAULT;
242 		    case ERRbadaccess:
243 			return EACCES;
244 		    case ERRbaddata:
245 			return E2BIG;
246 		    case ERRbaddrive:
247 		    case ERRnotready:	/* nt */
248 			return ENXIO;
249 		    case ERRdiffdevice:
250 			return EXDEV;
251 		    case ERRnofiles:
252 			return 0;	/* eeof ? */
253 			return ETXTBSY;
254 		    case ERRlock:
255 			return EDEADLK;
256 		    case ERRfilexists:
257 			return EEXIST;
258 		    case 123:		/* dunno what is it, but samba maps as noent */
259 			return ENOENT;
260 		    case 145:		/* samba */
261 			return ENOTEMPTY;
262 		    case 183:
263 			return EEXIST;
264 		}
265 		break;
266 	    case ERRSRV:
267 		switch (eno) {
268 		    case ERRerror:
269 			return EINVAL;
270 		    case ERRbadpw:
271 			return EAUTH;
272 		    case ERRaccess:
273 			return EACCES;
274 		    case ERRinvnid:
275 			return ENETRESET;
276 		    case ERRinvnetname:
277 			SMBERROR("NetBIOS name is invalid\n");
278 			return EAUTH;
279 		    case 3:		/* reserved and returned */
280 			return EIO;
281 		    case 2239:		/* NT: account exists but disabled */
282 			return EPERM;
283 		}
284 		break;
285 	    case ERRHRD:
286 		switch (eno) {
287 		    case ERRnowrite:
288 			return EROFS;
289 		    case ERRbadunit:
290 			return ENODEV;
291 		    case ERRnotready:
292 		    case ERRbadcmd:
293 		    case ERRdata:
294 			return EIO;
295 		    case ERRbadreq:
296 			return EBADRPC;
297 		    case ERRbadshare:
298 			return ETXTBSY;
299 		    case ERRlock:
300 			return EDEADLK;
301 		}
302 		break;
303 	}
304 	SMBERROR("Unmapped error %d:%d\n", eclass, eno);
305 	return EBADRPC;
306 }
307 
308 static int
309 smb_copy_iconv(struct mbchain *mbp, c_caddr_t src, caddr_t dst, int len)
310 {
311 	int outlen = len;
312 
313 	return iconv_conv((struct iconv_drv*)mbp->mb_udata, &src, &len, &dst, &outlen);
314 }
315 
316 int
317 smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
318 	int size, int caseopt)
319 {
320 	struct iconv_drv *dp = vcp->vc_toserver;
321 
322 	if (size == 0)
323 		return 0;
324 	if (dp == NULL) {
325 		return mb_put_mem(mbp, src, size, MB_MSYSTEM);
326 	}
327 	mbp->mb_copy = smb_copy_iconv;
328 	mbp->mb_udata = dp;
329 	return mb_put_mem(mbp, src, size, MB_MCUSTOM);
330 }
331 
332 int
333 smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
334 	int caseopt)
335 {
336 	int error;
337 
338 	error = smb_put_dmem(mbp, vcp, src, strlen(src), caseopt);
339 	if (error)
340 		return error;
341 	return mb_put_uint8(mbp, 0);
342 }
343 
344 int
345 smb_put_asunistring(struct smb_rq *rqp, const char *src)
346 {
347 	struct mbchain *mbp = &rqp->sr_rq;
348 	struct iconv_drv *dp = rqp->sr_vc->vc_toserver;
349 	u_char c;
350 	int error;
351 
352 	while (*src) {
353 		iconv_convmem(dp, &c, src++, 1);
354 		error = mb_put_uint16le(mbp, c);
355 		if (error)
356 			return error;
357 	}
358 	return mb_put_uint16le(mbp, 0);
359 }
360 
361 /*
362  * Create a kernel process/thread/whatever.  It shares it's address space
363  * with proc0 - ie: kernel only.
364  *
365  * XXX only the SMB protocol uses this, we should convert this mess to a
366  * pure thread when possible.
367  */
368 int
369 kthread_create2(void (*func)(void *), void *arg,
370     struct proc **newpp, int flags, const char *fmt, ...)
371 {
372 	int error;
373 	__va_list ap;
374 	struct proc *p2;
375 
376 	if (!proc0.p_stats || proc0.p_thread->td_start.tv_sec == 0) {
377 		panic("kthread_create called too soon");
378 	}
379 
380 	error = fork1(&proc0, RFMEM | RFFDG | RFPROC | flags, &p2);
381 	if (error)
382 		return error;
383 
384 	/* save a global descriptor, if desired */
385 	if (newpp != NULL)
386 		*newpp = p2;
387 
388 	/* this is a non-swapped system process */
389 	p2->p_flag |= P_INMEM | P_SYSTEM;
390 	p2->p_procsig->ps_flag |= PS_NOCLDWAIT;
391 	PHOLD(p2);
392 
393 	/* set up arg0 for 'ps', et al */
394 	__va_start(ap, fmt);
395 	vsnprintf(p2->p_comm, sizeof(p2->p_comm), fmt, ap);
396 	__va_end(ap);
397 
398 	/* call the processes' main()... */
399 	cpu_set_fork_handler(p2, func, arg);
400 	start_forked_proc(&proc0, p2);
401 
402 	return 0;
403 }
404 
405 void
406 kthread_exit2(void)
407 {
408 	exit1(0);
409 }
410 
411 /*
412  * smb_sleep() icky compat routine.  Leave the token held through the tsleep
413  * to interlock against the sleep.  Remember that the token could be lost
414  * since we blocked, so reget or release as appropriate.
415  */
416 int
417 smb_sleep(void *chan, struct lwkt_tokref *ilock, int slpflags, const char *wmesg, int timo)
418 {
419 	int error;
420 
421 	error = tsleep(chan, slpflags, wmesg, timo);
422 	if ((slpflags & PDROP) && ilock)
423 		lwkt_reltoken(ilock);
424 	return error;
425 }
426 
427