FreeBSD/Linux Kernel Cross Reference
sys/netsmb/smb_subr.c
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/10.1/sys/netsmb/smb_subr.c 227650 2011-11-18 03:05:20Z kevlo $");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/endian.h>
33 #include <sys/kernel.h>
34 #include <sys/malloc.h>
35 #include <sys/proc.h>
36 #include <sys/lock.h>
37 #include <sys/sysctl.h>
38 #include <sys/socket.h>
39 #include <sys/signalvar.h>
40 #include <sys/mbuf.h>
41
42 #include <sys/iconv.h>
43
44 #include <netsmb/smb.h>
45 #include <netsmb/smb_conn.h>
46 #include <netsmb/smb_rq.h>
47 #include <netsmb/smb_subr.h>
48
49 static MALLOC_DEFINE(M_SMBDATA, "SMBDATA", "Misc netsmb data");
50 static MALLOC_DEFINE(M_SMBSTR, "SMBSTR", "netsmb string data");
51 MALLOC_DEFINE(M_SMBTEMP, "SMBTEMP", "Temp netsmb data");
52
53 smb_unichar smb_unieol = 0;
54
55 void
56 smb_makescred(struct smb_cred *scred, struct thread *td, struct ucred *cred)
57 {
58 if (td) {
59 scred->scr_td = td;
60 scred->scr_cred = cred ? cred : td->td_ucred;
61 } else {
62 scred->scr_td = NULL;
63 scred->scr_cred = cred ? cred : NULL;
64 }
65 }
66
67 int
68 smb_td_intr(struct thread *td)
69 {
70 struct proc *p;
71 sigset_t tmpset;
72
73 if (td == NULL)
74 return 0;
75
76 p = td->td_proc;
77 PROC_LOCK(p);
78 tmpset = p->p_siglist;
79 SIGSETOR(tmpset, td->td_siglist);
80 SIGSETNAND(tmpset, td->td_sigmask);
81 mtx_lock(&p->p_sigacts->ps_mtx);
82 SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
83 mtx_unlock(&p->p_sigacts->ps_mtx);
84 if (SIGNOTEMPTY(td->td_siglist) && SMB_SIGMASK(tmpset)) {
85 PROC_UNLOCK(p);
86 return EINTR;
87 }
88 PROC_UNLOCK(p);
89 return 0;
90 }
91
92 char *
93 smb_strdup(const char *s)
94 {
95 char *p;
96 size_t 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, size_t maxlen)
112 {
113 char *p, bt;
114 int error;
115 size_t len;
116
117 len = 0;
118 for (p = s; ;p++) {
119 if (copyin(p, &bt, 1))
120 return NULL;
121 len++;
122 if (maxlen && len > maxlen)
123 return NULL;
124 if (bt == 0)
125 break;
126 }
127 p = malloc(len, M_SMBSTR, M_WAITOK);
128 error = copyin(s, p, len);
129 if (error) {
130 free(p, M_SMBSTR);
131 return (NULL);
132 }
133 return p;
134 }
135
136 /*
137 * duplicate memory block from a user space.
138 */
139 void *
140 smb_memdupin(void *umem, size_t len)
141 {
142 char *p;
143
144 if (len > 8 * 1024)
145 return NULL;
146 p = malloc(len, M_SMBSTR, M_WAITOK);
147 if (copyin(umem, p, len) == 0)
148 return p;
149 free(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 = malloc(len, M_SMBSTR, M_WAITOK);
164 if (p == NULL)
165 return NULL;
166 bcopy(umem, p, len);
167 return p;
168 }
169
170 void
171 smb_strfree(char *s)
172 {
173 free(s, M_SMBSTR);
174 }
175
176 void
177 smb_memfree(void *s)
178 {
179 free(s, M_SMBSTR);
180 }
181
182 void *
183 smb_zmalloc(size_t size, struct malloc_type *type, int flags)
184 {
185
186 return malloc(size, type, flags | M_ZERO);
187 }
188
189 void
190 smb_strtouni(u_int16_t *dst, const char *src)
191 {
192 while (*src) {
193 *dst++ = htole16(*src++);
194 }
195 *dst = 0;
196 }
197
198 #ifdef SMB_SOCKETDATA_DEBUG
199 void
200 m_dumpm(struct mbuf *m) {
201 char *p;
202 size_t len;
203 printf("d=");
204 while(m) {
205 p=mtod(m,char *);
206 len=m->m_len;
207 printf("(%zu)",len);
208 while(len--){
209 printf("%02x ",((int)*(p++)) & 0xff);
210 }
211 m=m->m_next;
212 };
213 printf("\n");
214 }
215 #endif
216
217 int
218 smb_maperror(int eclass, int eno)
219 {
220 if (eclass == 0 && eno == 0)
221 return 0;
222 switch (eclass) {
223 case ERRDOS:
224 switch (eno) {
225 case ERRbadfunc:
226 case ERRbadmcb:
227 case ERRbadenv:
228 case ERRbadformat:
229 case ERRrmuns:
230 return EINVAL;
231 case ERRbadfile:
232 case ERRbadpath:
233 case ERRremcd:
234 case 66: /* nt returns it when share not available */
235 case 67: /* observed from nt4sp6 when sharename wrong */
236 return ENOENT;
237 case ERRnofids:
238 return EMFILE;
239 case ERRnoaccess:
240 case ERRbadshare:
241 return EACCES;
242 case ERRbadfid:
243 return EBADF;
244 case ERRnomem:
245 return ENOMEM; /* actually remote no mem... */
246 case ERRbadmem:
247 return EFAULT;
248 case ERRbadaccess:
249 return EACCES;
250 case ERRbaddata:
251 return E2BIG;
252 case ERRbaddrive:
253 case ERRnotready: /* nt */
254 return ENXIO;
255 case ERRdiffdevice:
256 return EXDEV;
257 case ERRnofiles:
258 return 0; /* eeof ? */
259 return ETXTBSY;
260 case ERRlock:
261 return EDEADLK;
262 case ERRfilexists:
263 return EEXIST;
264 case 123: /* dunno what is it, but samba maps as noent */
265 return ENOENT;
266 case 145: /* samba */
267 return ENOTEMPTY;
268 case ERRnotlocked:
269 return 0; /* file become unlocked */
270 case 183:
271 return EEXIST;
272 case ERRquota:
273 return EDQUOT;
274 }
275 break;
276 case ERRSRV:
277 switch (eno) {
278 case ERRerror:
279 return EINVAL;
280 case ERRbadpw:
281 case ERRpasswordExpired:
282 return EAUTH;
283 case ERRaccess:
284 return EACCES;
285 case ERRinvnid:
286 return ENETRESET;
287 case ERRinvnetname:
288 SMBERROR("NetBIOS name is invalid\n");
289 return EAUTH;
290 case 3: /* reserved and returned */
291 return EIO;
292 case ERRaccountExpired:
293 case ERRbadClient:
294 case ERRbadLogonTime:
295 return EPERM;
296 case ERRnosupport:
297 return EBADRPC;
298 }
299 break;
300 case ERRHRD:
301 switch (eno) {
302 case ERRnowrite:
303 return EROFS;
304 case ERRbadunit:
305 return ENODEV;
306 case ERRnotready:
307 case ERRbadcmd:
308 case ERRdata:
309 return EIO;
310 case ERRbadreq:
311 return EBADRPC;
312 case ERRbadshare:
313 return ETXTBSY;
314 case ERRlock:
315 return EDEADLK;
316 }
317 break;
318 }
319 SMBERROR("Unmapped error %d:%d\n", eclass, eno);
320 return EBADRPC;
321 }
322
323 static int
324 smb_copy_iconv(struct mbchain *mbp, c_caddr_t src, caddr_t dst,
325 size_t *srclen, size_t *dstlen)
326 {
327 int error;
328 size_t inlen = *srclen, outlen = *dstlen;
329
330 error = iconv_conv((struct iconv_drv*)mbp->mb_udata, &src, &inlen,
331 &dst, &outlen);
332 if (inlen != *srclen || outlen != *dstlen) {
333 *srclen -= inlen;
334 *dstlen -= outlen;
335 return 0;
336 } else
337 return error;
338 }
339
340 int
341 smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
342 size_t size, int caseopt)
343 {
344 struct iconv_drv *dp = vcp->vc_toserver;
345
346 if (size == 0)
347 return 0;
348 if (dp == NULL) {
349 return mb_put_mem(mbp, src, size, MB_MSYSTEM);
350 }
351 mbp->mb_copy = smb_copy_iconv;
352 mbp->mb_udata = dp;
353 if (SMB_UNICODE_STRINGS(vcp))
354 mb_put_padbyte(mbp);
355 return mb_put_mem(mbp, src, size, MB_MCUSTOM);
356 }
357
358 int
359 smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
360 int caseopt)
361 {
362 int error;
363
364 error = smb_put_dmem(mbp, vcp, src, strlen(src), caseopt);
365 if (error)
366 return error;
367 if (SMB_UNICODE_STRINGS(vcp))
368 return mb_put_uint16le(mbp, 0);
369 return mb_put_uint8(mbp, 0);
370 }
371
372 int
373 smb_put_asunistring(struct smb_rq *rqp, const char *src)
374 {
375 struct mbchain *mbp = &rqp->sr_rq;
376 struct iconv_drv *dp = rqp->sr_vc->vc_toserver;
377 u_char c;
378 int error;
379
380 while (*src) {
381 iconv_convmem(dp, &c, src++, 1);
382 error = mb_put_uint16le(mbp, c);
383 if (error)
384 return error;
385 }
386 return mb_put_uint16le(mbp, 0);
387 }
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