2 * Copyright (c) 2000, Boris Popov
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
32 * $Id: mbuf.c,v 1.6 2001/02/24 15:56:04 bp Exp $
35 #include <sys/types.h>
36 #include <sys/endian.h>
37 #include <arpa/inet.h>
44 #include <netsmb/smb_lib.h>
46 #define MBERROR(format, args...) printf("%s(%d): "format, __FUNCTION__ , \
50 m_get(size_t len, struct mbuf **mpp)
57 m = malloc(M_BASESIZE + len);
60 bzero(m, M_BASESIZE + len);
68 m_free(struct mbuf *m)
74 m_freem(struct mbuf *m0)
86 m_totlen(struct mbuf *m0)
99 m_lineup(struct mbuf *m0, struct mbuf **mpp)
106 if (m0->m_next == NULL) {
110 if ((error = m_get(m_totlen(m0), &nm)) != 0)
112 dp = mtod(nm, char *);
115 bcopy(m0->m_data, dp, len);
126 mb_init(struct mbdata *mbp, size_t size)
131 if ((error = m_get(size, &m)) != 0)
133 return mb_initm(mbp, m);
137 mb_initm(struct mbdata *mbp, struct mbuf *m)
139 bzero(mbp, sizeof(*mbp));
140 mbp->mb_top = mbp->mb_cur = m;
141 mbp->mb_pos = mtod(m, char *);
146 mb_done(struct mbdata *mbp)
149 m_freem(mbp->mb_top);
157 mb_fixhdr(struct mbdata *mbp)
159 struct mbuf *m = mbp->mb_top;
166 mbp->mb_top->m_pkthdr.len = len;
171 m_getm(struct mbuf *top, size_t len, struct mbuf **mpp)
176 for (mp = top; ; mp = mp->m_next) {
177 len -= M_TRAILINGSPACE(mp);
178 if (mp->m_next == NULL)
183 if ((error = m_get(len, &m)) != 0)
192 * Routines to put data in a buffer
194 #define MB_PUT(t) int error; t *p; \
195 if ((error = mb_fit(mbp, sizeof(t), (char**)&p)) != 0) \
199 * Check if object of size 'size' fit to the current position and
200 * allocate new mbuf if not. Advance pointers and increase length of mbuf(s).
201 * Return pointer to the object placeholder or NULL if any error occured.
204 mb_fit(struct mbdata *mbp, size_t size, char **pp)
210 if (M_TRAILINGSPACE(m) < (int)size) {
211 if ((error = m_get(size, &mn)) != 0)
213 mbp->mb_pos = mtod(mn, char *);
214 mbp->mb_cur = m->m_next = mn;
220 mbp->mb_count += size;
225 mb_put_uint8(struct mbdata *mbp, u_int8_t x)
233 mb_put_uint16be(struct mbdata *mbp, u_int16_t x)
241 mb_put_uint16le(struct mbdata *mbp, u_int16_t x)
249 mb_put_uint32be(struct mbdata *mbp, u_int32_t x)
257 mb_put_uint32le(struct mbdata *mbp, u_int32_t x)
265 mb_put_int64be(struct mbdata *mbp, int64_t x)
273 mb_put_int64le(struct mbdata *mbp, int64_t x)
281 mb_put_mem(struct mbdata *mbp, const char *source, size_t size)
291 if ((error = m_getm(m, size, &m)) != 0)
294 cplen = M_TRAILINGSPACE(m);
301 dst = mtod(m, char *) + m->m_len;
303 bcopy(source, dst, cplen);
309 mbp->mb_count += cplen;
311 mbp->mb_pos = mtod(m, char *) + m->m_len;
317 mb_put_mbuf(struct mbdata *mbp, struct mbuf *m)
319 mbp->mb_cur->m_next = m;
321 mbp->mb_count += m->m_len;
322 if (m->m_next == NULL)
326 mbp->mb_pos = mtod(m, char *) + m->m_len;
332 mb_put_pstring(struct mbdata *mbp, const char *s)
334 int error, len = strlen(s);
339 if ((error = mb_put_uint8(mbp, len)) != 0)
341 return mb_put_mem(mbp, s, len);
345 * Routines for fetching data from an mbuf chain
347 #define mb_left(m,p) (mtod(m, char *) + (m)->m_len - (p))
350 mb_get_uint8(struct mbdata *mbp, u_int8_t *x)
352 return mb_get_mem(mbp, x, 1);
356 mb_get_uint16(struct mbdata *mbp, u_int16_t *x)
358 return mb_get_mem(mbp, (char *)x, 2);
362 mb_get_uint16le(struct mbdata *mbp, u_int16_t *x)
365 int error = mb_get_uint16(mbp, &v);
373 mb_get_uint16be(struct mbdata *mbp, u_int16_t *x) {
375 int error = mb_get_uint16(mbp, &v);
383 mb_get_uint32(struct mbdata *mbp, u_int32_t *x)
385 return mb_get_mem(mbp, (char *)x, 4);
389 mb_get_uint32be(struct mbdata *mbp, u_int32_t *x)
394 error = mb_get_uint32(mbp, &v);
401 mb_get_uint32le(struct mbdata *mbp, u_int32_t *x)
406 error = mb_get_uint32(mbp, &v);
413 mb_get_int64(struct mbdata *mbp, int64_t *x)
415 return mb_get_mem(mbp, (char *)x, 8);
419 mb_get_int64be(struct mbdata *mbp, int64_t *x)
424 error = mb_get_int64(mbp, &v);
431 mb_get_int64le(struct mbdata *mbp, int64_t *x)
436 error = mb_get_int64(mbp, &v);
443 mb_get_mem(struct mbdata *mbp, char * target, size_t size)
445 struct mbuf *m = mbp->mb_cur;
450 MBERROR("incomplete copy\n");
453 count = mb_left(m, mbp->mb_pos);
455 mbp->mb_cur = m = m->m_next;
457 mbp->mb_pos = mtod(m, char *);
465 *target++ = *mbp->mb_pos;
467 bcopy(mbp->mb_pos, target, count);
471 mbp->mb_pos += count;