1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/endian.h>
35#include <sys/kernel.h>
36#include <sys/malloc.h>
37#include <sys/proc.h>
38#include <sys/lock.h>
39#include <sys/sysctl.h>
40#include <sys/socket.h>
41#include <sys/signalvar.h>
42#include <sys/mbuf.h>
43
44#include <sys/iconv.h>
45
46#include <netsmb/smb.h>
47#include <netsmb/smb_conn.h>
48#include <netsmb/smb_rq.h>
49#include <netsmb/smb_subr.h>
50
51static MALLOC_DEFINE(M_SMBDATA, "SMBDATA", "Misc netsmb data");
52static MALLOC_DEFINE(M_SMBSTR, "SMBSTR", "netsmb string data");
53MALLOC_DEFINE(M_SMBTEMP, "SMBTEMP", "Temp netsmb data");
54
55smb_unichar smb_unieol = 0;
56
57void
58smb_makescred(struct smb_cred *scred, struct thread *td, struct ucred *cred)
59{
60	if (td) {
61		scred->scr_td = td;
62		scred->scr_cred = cred ? cred : td->td_ucred;
63	} else {
64		scred->scr_td = NULL;
65		scred->scr_cred = cred ? cred : NULL;
66	}
67}
68
69int
70smb_td_intr(struct thread *td)
71{
72	struct proc *p;
73	sigset_t tmpset;
74
75	if (td == NULL)
76		return 0;
77
78	p = td->td_proc;
79	PROC_LOCK(p);
80	tmpset = p->p_siglist;
81	SIGSETOR(tmpset, td->td_siglist);
82	SIGSETNAND(tmpset, td->td_sigmask);
83	mtx_lock(&p->p_sigacts->ps_mtx);
84	SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
85	mtx_unlock(&p->p_sigacts->ps_mtx);
86	if (SIGNOTEMPTY(td->td_siglist) && SMB_SIGMASK(tmpset)) {
87		PROC_UNLOCK(p);
88                return EINTR;
89	}
90	PROC_UNLOCK(p);
91	return 0;
92}
93
94char *
95smb_strdup(const char *s)
96{
97	char *p;
98	size_t len;
99
100	len = s ? strlen(s) + 1 : 1;
101	p = malloc(len, M_SMBSTR, M_WAITOK);
102	if (s)
103		bcopy(s, p, len);
104	else
105		*p = 0;
106	return p;
107}
108
109/*
110 * duplicate string from a user space.
111 */
112char *
113smb_strdupin(char *s, size_t maxlen)
114{
115	char *p;
116	int error;
117
118	p = malloc(maxlen + 1, M_SMBSTR, M_WAITOK);
119	error = copyinstr(s, p, maxlen + 1, NULL);
120	if (error) {
121		free(p, M_SMBSTR);
122		return (NULL);
123	}
124	return p;
125}
126
127/*
128 * duplicate memory block from a user space.
129 */
130void *
131smb_memdupin(void *umem, size_t len)
132{
133	char *p;
134
135	if (len > 8 * 1024)
136		return NULL;
137	p = malloc(len, M_SMBSTR, M_WAITOK);
138	if (copyin(umem, p, len) == 0)
139		return p;
140	free(p, M_SMBSTR);
141	return NULL;
142}
143
144/*
145 * duplicate memory block in the kernel space.
146 */
147void *
148smb_memdup(const void *umem, int len)
149{
150	char *p;
151
152	if (len > 8 * 1024)
153		return NULL;
154	p = malloc(len, M_SMBSTR, M_WAITOK);
155	if (p == NULL)
156		return NULL;
157	bcopy(umem, p, len);
158	return p;
159}
160
161void
162smb_strfree(char *s)
163{
164	free(s, M_SMBSTR);
165}
166
167void
168smb_memfree(void *s)
169{
170	free(s, M_SMBSTR);
171}
172
173void *
174smb_zmalloc(size_t size, struct malloc_type *type, int flags)
175{
176
177	return malloc(size, type, flags | M_ZERO);
178}
179
180void
181smb_strtouni(u_int16_t *dst, const char *src)
182{
183	while (*src) {
184		*dst++ = htole16(*src++);
185	}
186	*dst = 0;
187}
188
189#ifdef SMB_SOCKETDATA_DEBUG
190void
191m_dumpm(struct mbuf *m) {
192	char *p;
193	size_t len;
194	printf("d=");
195	while(m) {
196		p=mtod(m,char *);
197		len=m->m_len;
198		printf("(%zu)",len);
199		while(len--){
200			printf("%02x ",((int)*(p++)) & 0xff);
201		}
202		m=m->m_next;
203	}
204	printf("\n");
205}
206#endif
207
208int
209smb_maperror(int eclass, int eno)
210{
211	if (eclass == 0 && eno == 0)
212		return 0;
213	switch (eclass) {
214	    case ERRDOS:
215		switch (eno) {
216		    case ERRbadfunc:
217		    case ERRbadmcb:
218		    case ERRbadenv:
219		    case ERRbadformat:
220		    case ERRrmuns:
221			return EINVAL;
222		    case ERRbadfile:
223		    case ERRbadpath:
224		    case ERRremcd:
225		    case 66:		/* nt returns it when share not available */
226		    case 67:		/* observed from nt4sp6 when sharename wrong */
227			return ENOENT;
228		    case ERRnofids:
229			return EMFILE;
230		    case ERRnoaccess:
231		    case ERRbadshare:
232			return EACCES;
233		    case ERRbadfid:
234			return EBADF;
235		    case ERRnomem:
236			return ENOMEM;	/* actually remote no mem... */
237		    case ERRbadmem:
238			return EFAULT;
239		    case ERRbadaccess:
240			return EACCES;
241		    case ERRbaddata:
242			return E2BIG;
243		    case ERRbaddrive:
244		    case ERRnotready:	/* nt */
245			return ENXIO;
246		    case ERRdiffdevice:
247			return EXDEV;
248		    case ERRnofiles:
249			return 0;	/* eeof ? */
250			return ETXTBSY;
251		    case ERRlock:
252			return EDEADLK;
253		    case ERRfilexists:
254			return EEXIST;
255		    case 123:		/* dunno what is it, but samba maps as noent */
256			return ENOENT;
257		    case 145:		/* samba */
258			return ENOTEMPTY;
259		    case ERRnotlocked:
260			return 0;	/* file become unlocked */
261		    case 183:
262			return EEXIST;
263		    case ERRquota:
264			return EDQUOT;
265		}
266		break;
267	    case ERRSRV:
268		switch (eno) {
269		    case ERRerror:
270			return EINVAL;
271		    case ERRbadpw:
272		    case ERRpasswordExpired:
273			return EAUTH;
274		    case ERRaccess:
275			return EACCES;
276		    case ERRinvnid:
277			return ENETRESET;
278		    case ERRinvnetname:
279			SMBERROR("NetBIOS name is invalid\n");
280			return EAUTH;
281		    case 3:		/* reserved and returned */
282			return EIO;
283		    case ERRaccountExpired:
284		    case ERRbadClient:
285		    case ERRbadLogonTime:
286			return EPERM;
287		    case ERRnosupport:
288			return EBADRPC;
289		}
290		break;
291	    case ERRHRD:
292		switch (eno) {
293		    case ERRnowrite:
294			return EROFS;
295		    case ERRbadunit:
296			return ENODEV;
297		    case ERRnotready:
298		    case ERRbadcmd:
299		    case ERRdata:
300			return EIO;
301		    case ERRbadreq:
302			return EBADRPC;
303		    case ERRbadshare:
304			return ETXTBSY;
305		    case ERRlock:
306			return EDEADLK;
307		}
308		break;
309	}
310	SMBERROR("Unmapped error %d:%d\n", eclass, eno);
311	return EBADRPC;
312}
313
314static int
315smb_copy_iconv(struct mbchain *mbp, c_caddr_t src, caddr_t dst,
316    size_t *srclen, size_t *dstlen)
317{
318	int error;
319	size_t inlen = *srclen, outlen = *dstlen;
320
321	error = iconv_conv((struct iconv_drv*)mbp->mb_udata, &src, &inlen,
322	    &dst, &outlen);
323	if (inlen != *srclen || outlen != *dstlen) {
324		*srclen -= inlen;
325		*dstlen -= outlen;
326		return 0;
327	} else
328		return error;
329}
330
331int
332smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
333	size_t size, int caseopt)
334{
335	struct iconv_drv *dp = vcp->vc_toserver;
336
337	if (size == 0)
338		return 0;
339	if (dp == NULL) {
340		return mb_put_mem(mbp, src, size, MB_MSYSTEM);
341	}
342	mbp->mb_copy = smb_copy_iconv;
343	mbp->mb_udata = dp;
344	if (SMB_UNICODE_STRINGS(vcp))
345		mb_put_padbyte(mbp);
346	return mb_put_mem(mbp, src, size, MB_MCUSTOM);
347}
348
349int
350smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
351	int caseopt)
352{
353	int error;
354
355	error = smb_put_dmem(mbp, vcp, src, strlen(src), caseopt);
356	if (error)
357		return error;
358	if (SMB_UNICODE_STRINGS(vcp))
359		return mb_put_uint16le(mbp, 0);
360	return mb_put_uint8(mbp, 0);
361}
362
363int
364smb_put_asunistring(struct smb_rq *rqp, const char *src)
365{
366	struct mbchain *mbp = &rqp->sr_rq;
367	struct iconv_drv *dp = rqp->sr_vc->vc_toserver;
368	u_char c;
369	int error;
370
371	while (*src) {
372		iconv_convmem(dp, &c, src++, 1);
373		error = mb_put_uint16le(mbp, c);
374		if (error)
375			return error;
376	}
377	return mb_put_uint16le(mbp, 0);
378}
379