xref: /dragonfly/sys/netproto/smb/smb_subr.c (revision 3170ffd7) 
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 1.30 2008/01/06 16:55:53 swildner Exp $
34  */
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/endian.h>
38 #include <sys/kernel.h>
39 #include <sys/kthread.h>
40 #include <sys/malloc.h>
41 #include <sys/mbuf.h>
42 #include <sys/proc.h>
43 #include <sys/lock.h>
44 #include <sys/resourcevar.h>
45 #include <sys/sysctl.h>
46 #include <sys/socket.h>
47 #include <sys/signalvar.h>
48 #include <sys/wait.h>
49 #include <sys/unistd.h>
50 
51 #include <sys/signal2.h>
52 #include <sys/mplock2.h>
53 
54 #include <machine/stdarg.h>
55 
56 #include <sys/iconv.h>
57 
58 #include "smb.h"
59 #include "smb_conn.h"
60 #include "smb_rq.h"
61 #include "smb_subr.h"
62 
63 MALLOC_DEFINE(M_SMBDATA, "SMBDATA", "Misc netsmb data");
64 MALLOC_DEFINE(M_SMBSTR, "SMBSTR", "netsmb string data");
65 MALLOC_DEFINE(M_SMBTEMP, "SMBTEMP", "Temp netsmb data");
66 
67 smb_unichar smb_unieol = 0;
68 
69 void
70 smb_makescred(struct smb_cred *scred, struct thread *td, struct ucred *cred)
71 {
72 	scred->scr_td = td;
73 	if (td && td->td_proc) {
74 		scred->scr_cred = cred ? cred : td->td_proc->p_ucred;
75 	} else {
76 		scred->scr_cred = cred ? cred : NULL;
77 	}
78 }
79 
80 int
81 smb_proc_intr(struct thread *td)
82 {
83 	sigset_t tmpset;
84 	struct proc *p;
85 	struct lwp *lp;
86 
87 	if (td == NULL || (p = td->td_proc) == NULL)
88 		return 0;
89 	lp = td->td_lwp;
90 	tmpset = lwp_sigpend(lp);
91 	SIGSETNAND(tmpset, lp->lwp_sigmask);
92 	SIGSETNAND(tmpset, p->p_sigignore);
93 	if (SIGNOTEMPTY(tmpset) && SMB_SIGMASK(tmpset))
94                 return EINTR;
95 	return 0;
96 }
97 
98 char *
99 smb_strdup(const char *s)
100 {
101 	char *p;
102 	int len;
103 
104 	len = s ? strlen(s) + 1 : 1;
105 	p = kmalloc(len, M_SMBSTR, M_WAITOK);
106 	if (s)
107 		bcopy(s, p, len);
108 	else
109 		*p = 0;
110 	return p;
111 }
112 
113 /*
114  * duplicate string from a user space.
115  */
116 char *
117 smb_strdupin(char *s, int maxlen)
118 {
119 	char *p, bt;
120 	int len = 0;
121 
122 	for (p = s; ;p++) {
123 		if (copyin(p, &bt, 1))
124 			return NULL;
125 		len++;
126 		if (maxlen && len > maxlen)
127 			return NULL;
128 		if (bt == 0)
129 			break;
130 	}
131 	p = kmalloc(len, M_SMBSTR, M_WAITOK);
132 	copyin(s, p, len);
133 	return p;
134 }
135 
136 /*
137  * duplicate memory block from a user space.
138  */
139 void *
140 smb_memdupin(void *umem, int len)
141 {
142 	char *p;
143 
144 	if (len > 8 * 1024)
145 		return NULL;
146 	p = kmalloc(len, M_SMBSTR, M_WAITOK);
147 	if (copyin(umem, p, len) == 0)
148 		return p;
149 	kfree(p, M_SMBSTR);
150 	return NULL;
151 }
152 
153 /*
154  * duplicate memory block in the kernel space.
155  */
156 void *
157 smb_memdup(const void *umem, int len)
158 {
159 	char *p;
160 
161 	if (len > 8 * 1024)
162 		return NULL;
163 	p = kmalloc(len, M_SMBSTR, M_WAITOK);
164 	bcopy(umem, p, len);
165 	return p;
166 }
167 
168 void
169 smb_strfree(char *s)
170 {
171 	kfree(s, M_SMBSTR);
172 }
173 
174 void
175 smb_memfree(void *s)
176 {
177 	kfree(s, M_SMBSTR);
178 }
179 
180 void *
181 smb_zmalloc(unsigned long size, struct malloc_type *type, int flags)
182 {
183 
184 	return kmalloc(size, type, flags | M_ZERO);
185 }
186 
187 void
188 smb_strtouni(u_int16_t *dst, const char *src)
189 {
190 	while (*src) {
191 		*dst++ = htole16(*src++);
192 	}
193 	*dst = 0;
194 }
195 
196 #ifdef SMB_SOCKETDATA_DEBUG
197 void
198 m_dumpm(struct mbuf *m) {
199 	char *p;
200 	int len;
201 	kprintf("d=");
202 	while(m) {
203 		p=mtod(m,char *);
204 		len=m->m_len;
205 		kprintf("(%d)",len);
206 		while(len--){
207 			kprintf("%02x ",((int)*(p++)) & 0xff);
208 		}
209 		m=m->m_next;
210 	};
211 	kprintf("\n");
212 }
213 #endif
214 
215 int
216 smb_maperror(int eclass, int eno)
217 {
218 	if (eclass == 0 && eno == 0)
219 		return 0;
220 	switch (eclass) {
221 	    case ERRDOS:
222 		switch (eno) {
223 		    case ERRbadfunc:
224 		    case ERRbadmcb:
225 		    case ERRbadenv:
226 		    case ERRbadformat:
227 		    case ERRrmuns:
228 			return EINVAL;
229 		    case ERRbadfile:
230 		    case ERRbadpath:
231 		    case ERRremcd:
232 		    case 66:		/* nt returns it when share not available */
233 		    case 67:		/* observed from nt4sp6 when sharename wrong */
234 			return ENOENT;
235 		    case ERRnofids:
236 			return EMFILE;
237 		    case ERRnoaccess:
238 		    case ERRbadshare:
239 			return EACCES;
240 		    case ERRbadfid:
241 			return EBADF;
242 		    case ERRnomem:
243 			return ENOMEM;	/* actually remote no mem... */
244 		    case ERRbadmem:
245 			return EFAULT;
246 		    case ERRbadaccess:
247 			return EACCES;
248 		    case ERRbaddata:
249 			return E2BIG;
250 		    case ERRbaddrive:
251 		    case ERRnotready:	/* nt */
252 			return ENXIO;
253 		    case ERRdiffdevice:
254 			return EXDEV;
255 		    case ERRnofiles:
256 			return 0;	/* eeof ? */
257 			return ETXTBSY;
258 		    case ERRlock:
259 			return EDEADLK;
260 		    case ERRfilexists:
261 			return EEXIST;
262 		    case 123:		/* dunno what is it, but samba maps as noent */
263 			return ENOENT;
264 		    case 145:		/* samba */
265 			return ENOTEMPTY;
266 		    case 183:
267 			return EEXIST;
268 		}
269 		break;
270 	    case ERRSRV:
271 		switch (eno) {
272 		    case ERRerror:
273 			return EINVAL;
274 		    case ERRbadpw:
275 			return EAUTH;
276 		    case ERRaccess:
277 			return EACCES;
278 		    case ERRinvnid:
279 			return ENETRESET;
280 		    case ERRinvnetname:
281 			SMBERROR("NetBIOS name is invalid\n");
282 			return EAUTH;
283 		    case 3:		/* reserved and returned */
284 			return EIO;
285 		    case 2239:		/* NT: account exists but disabled */
286 			return EPERM;
287 		}
288 		break;
289 	    case ERRHRD:
290 		switch (eno) {
291 		    case ERRnowrite:
292 			return EROFS;
293 		    case ERRbadunit:
294 			return ENODEV;
295 		    case ERRnotready:
296 		    case ERRbadcmd:
297 		    case ERRdata:
298 			return EIO;
299 		    case ERRbadreq:
300 			return EBADRPC;
301 		    case ERRbadshare:
302 			return ETXTBSY;
303 		    case ERRlock:
304 			return EDEADLK;
305 		}
306 		break;
307 	}
308 	SMBERROR("Unmapped error %d:%d\n", eclass, eno);
309 	return EBADRPC;
310 }
311 
312 static int
313 smb_copy_iconv(struct mbchain *mbp, c_caddr_t src, caddr_t dst,
314     size_t *srclen, size_t *dstlen)
315 {
316 	int error;
317 	size_t inlen = *srclen, outlen = *dstlen;
318 
319 	error = iconv_conv((struct iconv_drv*)mbp->mb_udata, &src, &inlen,
320 	    &dst, &outlen);
321 	if (inlen != *srclen || outlen != *dstlen) {
322 		*srclen -= inlen;
323 		*dstlen -= outlen;
324 		return 0;
325 	} else {
326 		return error;
327 	}
328 }
329 
330 int
331 smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
332 	int size, int caseopt)
333 {
334 	struct iconv_drv *dp = vcp->vc_toserver;
335 
336 	if (size == 0)
337 		return 0;
338 	if (dp == NULL) {
339 		return mb_put_mem(mbp, src, size, MB_MSYSTEM);
340 	}
341 	mbp->mb_copy = smb_copy_iconv;
342 	mbp->mb_udata = dp;
343 	return mb_put_mem(mbp, src, size, MB_MCUSTOM);
344 }
345 
346 int
347 smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
348 	int caseopt)
349 {
350 	int error;
351 
352 	error = smb_put_dmem(mbp, vcp, src, strlen(src), caseopt);
353 	if (error)
354 		return error;
355 	return mb_put_uint8(mbp, 0);
356 }
357 
358 int
359 smb_put_asunistring(struct smb_rq *rqp, const char *src)
360 {
361 	struct mbchain *mbp = &rqp->sr_rq;
362 	struct iconv_drv *dp = rqp->sr_vc->vc_toserver;
363 	u_char c;
364 	int error;
365 
366 	while (*src) {
367 		iconv_convmem(dp, &c, src++, 1);
368 		error = mb_put_uint16le(mbp, c);
369 		if (error)
370 			return error;
371 	}
372 	return mb_put_uint16le(mbp, 0);
373 }
374 
375 /*
376  * Create a kernel process/thread/whatever.  It shares it's address space
377  * with proc0 - ie: kernel only.
378  *
379  * XXX only the SMB protocol uses this, we should convert this mess to a
380  * pure thread when possible.
381  */
382 int
383 smb_kthread_create(void (*func)(void *), void *arg,
384 		   struct proc **newpp, int flags, const char *fmt, ...)
385 {
386 	int error;
387 	__va_list ap;
388 	struct proc *p2;
389 	struct lwp *lp2;
390 
391 	error = fork1(&lwp0, RFMEM | RFFDG | RFPROC | flags, &p2);
392 	if (error)
393 		return error;
394 
395 	/* save a global descriptor, if desired */
396 	if (newpp != NULL)
397 		*newpp = p2;
398 
399 	/* this is a non-swapped system process */
400 	p2->p_flags |= P_SYSTEM;
401 	p2->p_sigacts->ps_flag |= PS_NOCLDWAIT;
402 
403 	lp2 = ONLY_LWP_IN_PROC(p2);
404 
405 	/* set up arg0 for 'ps', et al */
406 	__va_start(ap, fmt);
407 	kvsnprintf(p2->p_comm, sizeof(p2->p_comm), fmt, ap);
408 	__va_end(ap);
409 
410 	lp2->lwp_thread->td_ucred = crhold(proc0.p_ucred);
411 
412 	/* call the processes' main()... */
413 	cpu_set_fork_handler(lp2,
414 			     (void (*)(void *, struct trapframe *))func, arg);
415 	start_forked_proc(&lwp0, p2);
416 
417 	return 0;
418 }
419 
420 void
421 smb_kthread_exit(void)
422 {
423 	exit1(0);
424 }
425 
426 /*
427  * smb_sleep() icky compat routine.  Leave the token held through the tsleep
428  * to interlock against the sleep.  Remember that the token could be lost
429  * since we blocked, so reget or release as appropriate.
430  */
431 int
432 smb_sleep(void *chan, struct smb_slock *sl, int slpflags, const char *wmesg, int timo)
433 {
434 	int error;
435 
436 	if (sl) {
437 		tsleep_interlock(chan, slpflags);
438 		smb_sl_unlock(sl);
439 		error = tsleep(chan, slpflags | PINTERLOCKED, wmesg, timo);
440 		if ((slpflags & PDROP) == 0)
441 			smb_sl_lock(sl);
442 	} else {
443 		error = tsleep(chan, slpflags, wmesg, timo);
444 	}
445 	return error;
446 }
447 
448