1 | /* $NetBSD: smb_subr.c,v 1.37 2014/11/15 18:52:45 nakayama Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 2000-2001 Boris Popov |
5 | * All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * 3. All advertising materials mentioning features or use of this software |
16 | * must display the following acknowledgement: |
17 | * This product includes software developed by Boris Popov. |
18 | * 4. Neither the name of the author nor the names of any co-contributors |
19 | * may be used to endorse or promote products derived from this software |
20 | * without specific prior written permission. |
21 | * |
22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
32 | * SUCH DAMAGE. |
33 | * |
34 | * FreeBSD: src/sys/netsmb/smb_subr.c,v 1.6 2002/04/17 03:14:28 bp Exp |
35 | */ |
36 | |
37 | #include <sys/cdefs.h> |
38 | __KERNEL_RCSID(0, "$NetBSD: smb_subr.c,v 1.37 2014/11/15 18:52:45 nakayama Exp $" ); |
39 | |
40 | #include <sys/param.h> |
41 | #include <sys/systm.h> |
42 | #include <sys/kernel.h> |
43 | #include <sys/malloc.h> |
44 | #include <sys/proc.h> |
45 | #include <sys/lock.h> |
46 | #include <sys/sysctl.h> |
47 | #include <sys/socket.h> |
48 | #include <sys/signal.h> |
49 | #include <sys/signalvar.h> |
50 | #include <sys/mbuf.h> |
51 | #include <sys/socketvar.h> /* for M_SONAME */ |
52 | #include <sys/kauth.h> |
53 | |
54 | #include <netsmb/iconv.h> |
55 | |
56 | #include <netsmb/smb.h> |
57 | #include <netsmb/smb_conn.h> |
58 | #include <netsmb/smb_rq.h> |
59 | #include <netsmb/smb_subr.h> |
60 | |
61 | const smb_unichar smb_unieol = 0; |
62 | |
63 | /* XXX M_SMBSTR could be static but that doesn't work with gcc 4.5 on alpha. */ |
64 | MALLOC_DEFINE(M_SMBSTR, "smbstr" , "SMB strings" ); |
65 | MALLOC_DEFINE(M_SMBTEMP, "smbtemp" , "Temp netsmb data" ); |
66 | |
67 | void |
68 | smb_makescred(struct smb_cred *scred, struct lwp *l, kauth_cred_t cred) |
69 | { |
70 | if (l) { |
71 | scred->scr_l = l; |
72 | scred->scr_cred = cred ? cred : l->l_cred; |
73 | } else { |
74 | scred->scr_l = NULL; |
75 | scred->scr_cred = cred ? cred : NULL; |
76 | } |
77 | } |
78 | |
79 | int |
80 | smb_proc_intr(struct lwp *l) |
81 | { |
82 | struct proc *p; |
83 | int error; |
84 | |
85 | if (l == NULL) |
86 | return 0; |
87 | p = l->l_proc; |
88 | |
89 | mutex_enter(p->p_lock); |
90 | error = sigispending(l, 0); |
91 | mutex_exit(p->p_lock); |
92 | |
93 | return (error != 0 ? EINTR : 0); |
94 | } |
95 | |
96 | char * |
97 | smb_strdup(const char *s) |
98 | { |
99 | char *p; |
100 | size_t len; |
101 | |
102 | len = s ? strlen(s) + 1 : 1; |
103 | p = malloc(len, M_SMBSTR, M_WAITOK); |
104 | if (s) |
105 | memcpy(p, s, len); |
106 | else |
107 | *p = 0; |
108 | return p; |
109 | } |
110 | |
111 | /* |
112 | * duplicate string from a user space. |
113 | */ |
114 | char * |
115 | smb_strdupin(char *s, size_t maxlen) |
116 | { |
117 | char *p, bt; |
118 | size_t len = 0; |
119 | |
120 | for (p = s; ;p++) { |
121 | if (copyin(p, &bt, 1)) |
122 | return NULL; |
123 | len++; |
124 | if (maxlen && len > maxlen) |
125 | return NULL; |
126 | if (bt == 0) |
127 | break; |
128 | } |
129 | p = malloc(len, M_SMBSTR, M_WAITOK); |
130 | copyin(s, p, len); |
131 | return p; |
132 | } |
133 | |
134 | /* |
135 | * duplicate memory block from a user space. |
136 | */ |
137 | void * |
138 | smb_memdupin(void *umem, size_t len) |
139 | { |
140 | char *p; |
141 | |
142 | if (len > 8 * 1024) |
143 | return NULL; |
144 | p = malloc(len, M_SMBSTR, M_WAITOK); |
145 | if (copyin(umem, p, len) == 0) |
146 | return p; |
147 | free(p, M_SMBSTR); |
148 | return NULL; |
149 | } |
150 | |
151 | void |
152 | smb_strfree(char *s) |
153 | { |
154 | free(s, M_SMBSTR); |
155 | } |
156 | |
157 | void |
158 | smb_memfree(void *s) |
159 | { |
160 | free(s, M_SMBSTR); |
161 | } |
162 | |
163 | void * |
164 | smb_zmalloc(size_t size, struct malloc_type *type, int flags) |
165 | { |
166 | |
167 | return malloc(size, type, flags | M_ZERO); |
168 | } |
169 | |
170 | void |
171 | smb_strtouni(u_int16_t *dst, const char *src) |
172 | { |
173 | while (*src) { |
174 | *dst++ = htole16(*src++); |
175 | } |
176 | *dst = 0; |
177 | } |
178 | |
179 | #ifdef SMB_SOCKETDATA_DEBUG |
180 | void |
181 | m_dumpm(struct mbuf *m) { |
182 | char *p; |
183 | size_t len; |
184 | printf("d=" ); |
185 | while(m) { |
186 | p = mtod(m,char *); |
187 | len = m->m_len; |
188 | printf("(%zu)" , len); |
189 | while(len--){ |
190 | printf("%02x " ,((int)*(p++)) & 0xff); |
191 | } |
192 | m=m->m_next; |
193 | }; |
194 | printf("\n" ); |
195 | } |
196 | #endif |
197 | |
198 | int |
199 | smb_maperror(int eclass, int eno) |
200 | { |
201 | if (eclass == 0 && eno == 0) |
202 | return 0; |
203 | switch (eclass) { |
204 | case ERRDOS: |
205 | switch (eno) { |
206 | case ERRbadfunc: |
207 | case ERRbadmcb: |
208 | case ERRbadenv: |
209 | case ERRbadformat: |
210 | case ERRrmuns: |
211 | return EINVAL; |
212 | case ERRnofiles: |
213 | case ERRbadfile: |
214 | case ERRbadpath: |
215 | case ERRremcd: |
216 | case ERRnoipc: /* nt returns it when share not available */ |
217 | case ERRnosuchshare: /* observed from nt4sp6 when sharename wrong */ |
218 | return ENOENT; |
219 | case ERRnofids: |
220 | return EMFILE; |
221 | case ERRnoaccess: |
222 | case ERRbadshare: |
223 | return EACCES; |
224 | case ERRbadfid: |
225 | return EBADF; |
226 | case ERRnomem: |
227 | return ENOMEM; /* actually remote no mem... */ |
228 | case ERRbadmem: |
229 | return EFAULT; |
230 | case ERRbadaccess: |
231 | return EACCES; |
232 | case ERRbaddata: |
233 | return E2BIG; |
234 | case ERRbaddrive: |
235 | case ERRnotready: /* nt */ |
236 | return ENXIO; |
237 | case ERRdiffdevice: |
238 | return EXDEV; |
239 | case ERRlock: |
240 | return EDEADLK; |
241 | case ERRfilexists: |
242 | return EEXIST; |
243 | case ERRinvalidname: /* dunno what is it, but samba maps as noent */ |
244 | return ENOENT; |
245 | case ERRdirnempty: /* samba */ |
246 | return ENOTEMPTY; |
247 | case ERRrename: |
248 | return EEXIST; |
249 | case ERRquota: |
250 | return EDQUOT; |
251 | case ERRnotlocked: |
252 | /* it's okay to try to unlock already unlocked file */ |
253 | return 0; |
254 | case NT_STATUS_NOTIFY_ENUM_DIR: |
255 | return EMSGSIZE; |
256 | } |
257 | break; |
258 | case ERRSRV: |
259 | switch (eno) { |
260 | case ERRerror: |
261 | return EINVAL; |
262 | case ERRbadpw: |
263 | case ERRpasswordExpired: |
264 | case ERRbaduid: |
265 | return EAUTH; |
266 | case ERRaccess: |
267 | return EACCES; |
268 | case ERRinvnid: |
269 | return ENETRESET; |
270 | case ERRinvnetname: |
271 | SMBERROR(("NetBIOS name is invalid\n" )); |
272 | return EAUTH; |
273 | case ERRbadtype: /* reserved and returned */ |
274 | return EIO; |
275 | case ERRaccountExpired: |
276 | case ERRbadClient: |
277 | case ERRbadLogonTime: |
278 | return EPERM; |
279 | case ERRnosupport: |
280 | return EBADRPC; |
281 | } |
282 | break; |
283 | case ERRHRD: |
284 | switch (eno) { |
285 | case ERRnowrite: |
286 | return EROFS; |
287 | case ERRbadunit: |
288 | return ENODEV; |
289 | case ERRnotready: |
290 | case ERRbadcmd: |
291 | case ERRdata: |
292 | return EIO; |
293 | case ERRbadreq: |
294 | return EBADRPC; |
295 | case ERRbadshare: |
296 | return ETXTBSY; |
297 | case ERRlock: |
298 | return EDEADLK; |
299 | case ERRgeneral: |
300 | /* returned e.g. for NT CANCEL SMB by Samba */ |
301 | return ECANCELED; |
302 | } |
303 | break; |
304 | } |
305 | SMBERROR(("Unmapped error %d:%d\n" , eclass, eno)); |
306 | return EBADRPC; |
307 | } |
308 | |
309 | static int |
310 | smb_copy_iconv(struct mbchain *mbp, const char *src, char *dst, |
311 | size_t *srclen, size_t *dstlen) |
312 | { |
313 | int error; |
314 | size_t inlen = *srclen, outlen = *dstlen; |
315 | |
316 | error = iconv_conv((struct iconv_drv*)mbp->mb_udata, &src, &inlen, |
317 | &dst, &outlen); |
318 | if (inlen != *srclen || outlen != *dstlen) { |
319 | *srclen -= inlen; |
320 | *dstlen -= outlen; |
321 | return 0; |
322 | } else |
323 | return error; |
324 | } |
325 | |
326 | int |
327 | smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src, |
328 | size_t size, int caseopt) |
329 | { |
330 | struct iconv_drv *dp = vcp->vc_toserver; |
331 | |
332 | if (size == 0) |
333 | return 0; |
334 | if (dp == NULL) { |
335 | return mb_put_mem(mbp, (const void *)src, size, MB_MSYSTEM); |
336 | } |
337 | mbp->mb_copy = smb_copy_iconv; |
338 | mbp->mb_udata = dp; |
339 | return mb_put_mem(mbp, (const void *)src, size, MB_MCUSTOM); |
340 | } |
341 | |
342 | int |
343 | smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp, const char *src, |
344 | int caseopt) |
345 | { |
346 | int error; |
347 | |
348 | error = smb_put_dmem(mbp, vcp, src, strlen(src), caseopt); |
349 | if (error) |
350 | return error; |
351 | return mb_put_uint8(mbp, 0); |
352 | } |
353 | |
354 | #if 0 |
355 | int |
356 | smb_put_asunistring(struct smb_rq *rqp, const char *src) |
357 | { |
358 | struct mbchain *mbp = &rqp->sr_rq; |
359 | struct iconv_drv *dp = rqp->sr_vc->vc_toserver; |
360 | u_char c; |
361 | int error; |
362 | |
363 | while (*src) { |
364 | iconv_convmem(dp, &c, src++, 1); |
365 | error = mb_put_uint16le(mbp, c); |
366 | if (error) |
367 | return error; |
368 | } |
369 | return mb_put_uint16le(mbp, 0); |
370 | } |
371 | #endif |
372 | |
373 | struct sockaddr * |
374 | dup_sockaddr(struct sockaddr *sa, int canwait) |
375 | { |
376 | struct sockaddr *sa2; |
377 | |
378 | sa2 = malloc(sa->sa_len, M_SONAME, canwait ? M_WAITOK : M_NOWAIT); |
379 | if (sa2) |
380 | memcpy(sa2, sa, sa->sa_len); |
381 | return sa2; |
382 | } |
383 | |