xref: /dragonfly/sys/netproto/smb/smb_subr.c (revision 2020c8fe) 
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/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 <sys/signal2.h>
51 #include <sys/mplock2.h>
52 
53 #include <machine/stdarg.h>
54 
55 #include <sys/iconv.h>
56 
57 #include "smb.h"
58 #include "smb_conn.h"
59 #include "smb_rq.h"
60 #include "smb_subr.h"
61 
62 MALLOC_DEFINE(M_SMBDATA, "SMBDATA", "Misc netsmb data");
63 MALLOC_DEFINE(M_SMBSTR, "SMBSTR", "netsmb string data");
64 MALLOC_DEFINE(M_SMBTEMP, "SMBTEMP", "Temp netsmb data");
65 
66 smb_unichar smb_unieol = 0;
67 
68 void
69 smb_makescred(struct smb_cred *scred, struct thread *td, struct ucred *cred)
70 {
71 	scred->scr_td = td;
72 	if (td && td->td_proc) {
73 		scred->scr_cred = cred ? cred : td->td_proc->p_ucred;
74 	} else {
75 		scred->scr_cred = cred ? cred : NULL;
76 	}
77 }
78 
79 int
80 smb_proc_intr(struct thread *td)
81 {
82 	sigset_t tmpset;
83 	struct proc *p;
84 	struct lwp *lp;
85 
86 	if (td == NULL || (p = td->td_proc) == NULL)
87 		return 0;
88 	lp = td->td_lwp;
89 	tmpset = lwp_sigpend(lp);
90 	SIGSETNAND(tmpset, lp->lwp_sigmask);
91 	SIGSETNAND(tmpset, p->p_sigignore);
92 	if (SIGNOTEMPTY(tmpset) && SMB_SIGMASK(tmpset))
93                 return EINTR;
94 	return 0;
95 }
96 
97 char *
98 smb_strdup(const char *s)
99 {
100 	char *p;
101 	int len;
102 
103 	len = s ? strlen(s) + 1 : 1;
104 	p = kmalloc(len, M_SMBSTR, M_WAITOK);
105 	if (s)
106 		bcopy(s, p, len);
107 	else
108 		*p = 0;
109 	return p;
110 }
111 
112 /*
113  * duplicate string from a user space.
114  */
115 char *
116 smb_strdupin(char *s, int maxlen)
117 {
118 	char *p, bt;
119 	int len = 0;
120 
121 	for (p = s; ;p++) {
122 		if (copyin(p, &bt, 1))
123 			return NULL;
124 		len++;
125 		if (maxlen && len > maxlen)
126 			return NULL;
127 		if (bt == 0)
128 			break;
129 	}
130 	p = kmalloc(len, M_SMBSTR, M_WAITOK);
131 	copyin(s, p, len);
132 	return p;
133 }
134 
135 /*
136  * duplicate memory block from a user space.
137  */
138 void *
139 smb_memdupin(void *umem, int len)
140 {
141 	char *p;
142 
143 	if (len > 8 * 1024)
144 		return NULL;
145 	p = kmalloc(len, M_SMBSTR, M_WAITOK);
146 	if (copyin(umem, p, len) == 0)
147 		return p;
148 	kfree(p, M_SMBSTR);
149 	return NULL;
150 }
151 
152 /*
153  * duplicate memory block in the kernel space.
154  */
155 void *
156 smb_memdup(const void *umem, int len)
157 {
158 	char *p;
159 
160 	if (len > 8 * 1024)
161 		return NULL;
162 	p = kmalloc(len, M_SMBSTR, M_WAITOK);
163 	bcopy(umem, p, len);
164 	return p;
165 }
166 
167 void
168 smb_strfree(char *s)
169 {
170 	kfree(s, M_SMBSTR);
171 }
172 
173 void
174 smb_memfree(void *s)
175 {
176 	kfree(s, M_SMBSTR);
177 }
178 
179 void *
180 smb_zmalloc(unsigned long size, struct malloc_type *type, int flags)
181 {
182 
183 	return kmalloc(size, type, flags | M_ZERO);
184 }
185 
186 void
187 smb_strtouni(u_int16_t *dst, const char *src)
188 {
189 	while (*src) {
190 		*dst++ = htoles(*src++);
191 	}
192 	*dst = 0;
193 }
194 
195 #ifdef SMB_SOCKETDATA_DEBUG
196 void
197 m_dumpm(struct mbuf *m) {
198 	char *p;
199 	int len;
200 	kprintf("d=");
201 	while(m) {
202 		p=mtod(m,char *);
203 		len=m->m_len;
204 		kprintf("(%d)",len);
205 		while(len--){
206 			kprintf("%02x ",((int)*(p++)) & 0xff);
207 		}
208 		m=m->m_next;
209 	};
210 	kprintf("\n");
211 }
212 #endif
213 
214 int
215 smb_maperror(int eclass, int eno)
216 {
217 	if (eclass == 0 && eno == 0)
218 		return 0;
219 	switch (eclass) {
220 	    case ERRDOS:
221 		switch (eno) {
222 		    case ERRbadfunc:
223 		    case ERRbadmcb:
224 		    case ERRbadenv:
225 		    case ERRbadformat:
226 		    case ERRrmuns:
227 			return EINVAL;
228 		    case ERRbadfile:
229 		    case ERRbadpath:
230 		    case ERRremcd:
231 		    case 66:		/* nt returns it when share not available */
232 		    case 67:		/* observed from nt4sp6 when sharename wrong */
233 			return ENOENT;
234 		    case ERRnofids:
235 			return EMFILE;
236 		    case ERRnoaccess:
237 		    case ERRbadshare:
238 			return EACCES;
239 		    case ERRbadfid:
240 			return EBADF;
241 		    case ERRnomem:
242 			return ENOMEM;	/* actually remote no mem... */
243 		    case ERRbadmem:
244 			return EFAULT;
245 		    case ERRbadaccess:
246 			return EACCES;
247 		    case ERRbaddata:
248 			return E2BIG;
249 		    case ERRbaddrive:
250 		    case ERRnotready:	/* nt */
251 			return ENXIO;
252 		    case ERRdiffdevice:
253 			return EXDEV;
254 		    case ERRnofiles:
255 			return 0;	/* eeof ? */
256 			return ETXTBSY;
257 		    case ERRlock:
258 			return EDEADLK;
259 		    case ERRfilexists:
260 			return EEXIST;
261 		    case 123:		/* dunno what is it, but samba maps as noent */
262 			return ENOENT;
263 		    case 145:		/* samba */
264 			return ENOTEMPTY;
265 		    case 183:
266 			return EEXIST;
267 		}
268 		break;
269 	    case ERRSRV:
270 		switch (eno) {
271 		    case ERRerror:
272 			return EINVAL;
273 		    case ERRbadpw:
274 			return EAUTH;
275 		    case ERRaccess:
276 			return EACCES;
277 		    case ERRinvnid:
278 			return ENETRESET;
279 		    case ERRinvnetname:
280 			SMBERROR("NetBIOS name is invalid\n");
281 			return EAUTH;
282 		    case 3:		/* reserved and returned */
283 			return EIO;
284 		    case 2239:		/* NT: account exists but disabled */
285 			return EPERM;
286 		}
287 		break;
288 	    case ERRHRD:
289 		switch (eno) {
290 		    case ERRnowrite:
291 			return EROFS;
292 		    case ERRbadunit:
293 			return ENODEV;
294 		    case ERRnotready:
295 		    case ERRbadcmd:
296 		    case ERRdata:
297 			return EIO;
298 		    case ERRbadreq:
299 			return EBADRPC;
300 		    case ERRbadshare:
301 			return ETXTBSY;
302 		    case ERRlock:
303 			return EDEADLK;
304 		}
305 		break;
306 	}
307 	SMBERROR("Unmapped error %d:%d\n", eclass, eno);
308 	return EBADRPC;
309 }
310 
311 static int
312 smb_copy_iconv(struct mbchain *mbp, c_caddr_t src, caddr_t dst, size_t len)
313 {
314 	size_t outlen = len;
315 
316 	return iconv_conv((struct iconv_drv*)mbp->mb_udata, &src, &len, &dst, &outlen);
317 }
318 
319 int
320 smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
321 	int size, int caseopt)
322 {
323 	struct iconv_drv *dp = vcp->vc_toserver;
324 
325 	if (size == 0)
326 		return 0;
327 	if (dp == NULL) {
328 		return mb_put_mem(mbp, src, size, MB_MSYSTEM);
329 	}
330 	mbp->mb_copy = smb_copy_iconv;
331 	mbp->mb_udata = dp;
332 	return mb_put_mem(mbp, src, size, MB_MCUSTOM);
333 }
334 
335 int
336 smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
337 	int caseopt)
338 {
339 	int error;
340 
341 	error = smb_put_dmem(mbp, vcp, src, strlen(src), caseopt);
342 	if (error)
343 		return error;
344 	return mb_put_uint8(mbp, 0);
345 }
346 
347 int
348 smb_put_asunistring(struct smb_rq *rqp, const char *src)
349 {
350 	struct mbchain *mbp = &rqp->sr_rq;
351 	struct iconv_drv *dp = rqp->sr_vc->vc_toserver;
352 	u_char c;
353 	int error;
354 
355 	while (*src) {
356 		iconv_convmem(dp, &c, src++, 1);
357 		error = mb_put_uint16le(mbp, c);
358 		if (error)
359 			return error;
360 	}
361 	return mb_put_uint16le(mbp, 0);
362 }
363 
364 /*
365  * Create a kernel process/thread/whatever.  It shares it's address space
366  * with proc0 - ie: kernel only.
367  *
368  * XXX only the SMB protocol uses this, we should convert this mess to a
369  * pure thread when possible.
370  */
371 int
372 smb_kthread_create(void (*func)(void *), void *arg,
373 		   struct proc **newpp, int flags, const char *fmt, ...)
374 {
375 	int error;
376 	__va_list ap;
377 	struct proc *p2;
378 	struct lwp *lp2;
379 
380 	error = fork1(&lwp0, 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_flags |= P_SYSTEM;
390 	p2->p_sigacts->ps_flag |= PS_NOCLDWAIT;
391 
392 	lp2 = ONLY_LWP_IN_PROC(p2);
393 
394 	/* set up arg0 for 'ps', et al */
395 	__va_start(ap, fmt);
396 	kvsnprintf(p2->p_comm, sizeof(p2->p_comm), fmt, ap);
397 	__va_end(ap);
398 
399 	lp2->lwp_thread->td_ucred = crhold(proc0.p_ucred);
400 
401 	/* call the processes' main()... */
402 	cpu_set_fork_handler(lp2,
403 			     (void (*)(void *, struct trapframe *))func, arg);
404 	start_forked_proc(&lwp0, p2);
405 
406 	return 0;
407 }
408 
409 void
410 smb_kthread_exit(void)
411 {
412 	exit1(0);
413 }
414 
415 /*
416  * smb_sleep() icky compat routine.  Leave the token held through the tsleep
417  * to interlock against the sleep.  Remember that the token could be lost
418  * since we blocked, so reget or release as appropriate.
419  */
420 int
421 smb_sleep(void *chan, struct smb_slock *sl, int slpflags, const char *wmesg, int timo)
422 {
423 	int error;
424 
425 	if (sl) {
426 		tsleep_interlock(chan, slpflags);
427 		smb_sl_unlock(sl);
428 		error = tsleep(chan, slpflags | PINTERLOCKED, wmesg, timo);
429 		if ((slpflags & PDROP) == 0)
430 			smb_sl_lock(sl);
431 	} else {
432 		error = tsleep(chan, slpflags, wmesg, timo);
433 	}
434 	return error;
435 }
436 
437