freebsd-dev/contrib/smbfs/lib/smb/mbuf.c
David E. O'Brien 1ac62e0b31 + Get prototypes for libc functions.
+ Use the correct printf format for size_t.
2004-10-19 17:44:31 +00:00

472 lines
8.5 KiB
C

/*
* Copyright (c) 2000, Boris Popov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Boris Popov.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: mbuf.c,v 1.6 2001/02/24 15:56:04 bp Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/mchain.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netsmb/smb_lib.h>
#define MBERROR(format, args...) printf("%s(%d): "format, __FUNCTION__ , \
__LINE__ ,## args)
static int
m_get(size_t len, struct mbuf **mpp)
{
struct mbuf *m;
len = M_ALIGN(len);
if (len < M_MINSIZE)
len = M_MINSIZE;
m = malloc(M_BASESIZE + len);
if (m == NULL)
return ENOMEM;
bzero(m, M_BASESIZE + len);
m->m_maxlen = len;
m->m_data = M_TOP(m);
*mpp = m;
return 0;
}
static void
m_free(struct mbuf *m)
{
free(m);
}
static void
m_freem(struct mbuf *m0)
{
struct mbuf *m;
while (m0) {
m = m0->m_next;
m_free(m0);
m0 = m;
}
}
static size_t
m_totlen(struct mbuf *m0)
{
struct mbuf *m = m0;
int len = 0;
while (m) {
len += m->m_len;
m = m->m_next;
}
return len;
}
int
m_lineup(struct mbuf *m0, struct mbuf **mpp)
{
struct mbuf *nm, *m;
char *dp;
size_t len;
int error;
if (m0->m_next == NULL) {
*mpp = m0;
return 0;
}
if ((error = m_get(m_totlen(m0), &nm)) != 0)
return error;
dp = mtod(nm, char *);
while (m0) {
len = m0->m_len;
bcopy(m0->m_data, dp, len);
dp += len;
m = m0->m_next;
m_free(m0);
m0 = m;
}
*mpp = nm;
return 0;
}
int
mb_init(struct mbdata *mbp, size_t size)
{
struct mbuf *m;
int error;
if ((error = m_get(size, &m)) != 0)
return error;
return mb_initm(mbp, m);
}
int
mb_initm(struct mbdata *mbp, struct mbuf *m)
{
bzero(mbp, sizeof(*mbp));
mbp->mb_top = mbp->mb_cur = m;
mbp->mb_pos = mtod(m, char *);
return 0;
}
int
mb_done(struct mbdata *mbp)
{
if (mbp->mb_top) {
m_freem(mbp->mb_top);
mbp->mb_top = NULL;
}
return 0;
}
/*
int
mb_fixhdr(struct mbdata *mbp)
{
struct mbuf *m = mbp->mb_top;
int len = 0;
while (m) {
len += m->m_len;
m = m->m_next;
}
mbp->mb_top->m_pkthdr.len = len;
return len;
}
*/
int
m_getm(struct mbuf *top, size_t len, struct mbuf **mpp)
{
struct mbuf *m, *mp;
int error;
for (mp = top; ; mp = mp->m_next) {
len -= M_TRAILINGSPACE(mp);
if (mp->m_next == NULL)
break;
}
if (len > 0) {
if ((error = m_get(len, &m)) != 0)
return error;
mp->m_next = m;
}
*mpp = top;
return 0;
}
/*
* Routines to put data in a buffer
*/
#define MB_PUT(t) int error; t *p; \
if ((error = mb_fit(mbp, sizeof(t), (char**)&p)) != 0) \
return error
/*
* Check if object of size 'size' fit to the current position and
* allocate new mbuf if not. Advance pointers and increase length of mbuf(s).
* Return pointer to the object placeholder or NULL if any error occured.
*/
int
mb_fit(struct mbdata *mbp, size_t size, char **pp)
{
struct mbuf *m, *mn;
int error;
m = mbp->mb_cur;
if (M_TRAILINGSPACE(m) < (int)size) {
if ((error = m_get(size, &mn)) != 0)
return error;
mbp->mb_pos = mtod(mn, char *);
mbp->mb_cur = m->m_next = mn;
m = mn;
}
m->m_len += size;
*pp = mbp->mb_pos;
mbp->mb_pos += size;
mbp->mb_count += size;
return 0;
}
int
mb_put_uint8(struct mbdata *mbp, u_int8_t x)
{
MB_PUT(u_int8_t);
*p = x;
return 0;
}
int
mb_put_uint16be(struct mbdata *mbp, u_int16_t x)
{
MB_PUT(u_int16_t);
setwbe(p, 0, x);
return 0;
}
int
mb_put_uint16le(struct mbdata *mbp, u_int16_t x)
{
MB_PUT(u_int16_t);
setwle(p, 0, x);
return 0;
}
int
mb_put_uint32be(struct mbdata *mbp, u_int32_t x)
{
MB_PUT(u_int32_t);
setdbe(p, 0, x);
return 0;
}
int
mb_put_uint32le(struct mbdata *mbp, u_int32_t x)
{
MB_PUT(u_int32_t);
setdle(p, 0, x);
return 0;
}
int
mb_put_int64be(struct mbdata *mbp, int64_t x)
{
MB_PUT(int64_t);
*p = htobeq(x);
return 0;
}
int
mb_put_int64le(struct mbdata *mbp, int64_t x)
{
MB_PUT(int64_t);
*p = htoleq(x);
return 0;
}
int
mb_put_mem(struct mbdata *mbp, const char *source, size_t size)
{
struct mbuf *m;
char * dst;
size_t cplen;
int error;
if (size == 0)
return 0;
m = mbp->mb_cur;
if ((error = m_getm(m, size, &m)) != 0)
return error;
while (size > 0) {
cplen = M_TRAILINGSPACE(m);
if (cplen == 0) {
m = m->m_next;
continue;
}
if (cplen > size)
cplen = size;
dst = mtod(m, char *) + m->m_len;
if (source) {
bcopy(source, dst, cplen);
source += cplen;
} else
bzero(dst, cplen);
size -= cplen;
m->m_len += cplen;
mbp->mb_count += cplen;
}
mbp->mb_pos = mtod(m, char *) + m->m_len;
mbp->mb_cur = m;
return 0;
}
int
mb_put_mbuf(struct mbdata *mbp, struct mbuf *m)
{
mbp->mb_cur->m_next = m;
while (m) {
mbp->mb_count += m->m_len;
if (m->m_next == NULL)
break;
m = m->m_next;
}
mbp->mb_pos = mtod(m, char *) + m->m_len;
mbp->mb_cur = m;
return 0;
}
int
mb_put_pstring(struct mbdata *mbp, const char *s)
{
int error, len = strlen(s);
if (len > 255) {
len = 255;
}
if ((error = mb_put_uint8(mbp, len)) != 0)
return error;
return mb_put_mem(mbp, s, len);
}
/*
* Routines for fetching data from an mbuf chain
*/
#define mb_left(m,p) (mtod(m, char *) + (m)->m_len - (p))
int
mb_get_uint8(struct mbdata *mbp, u_int8_t *x)
{
return mb_get_mem(mbp, x, 1);
}
int
mb_get_uint16(struct mbdata *mbp, u_int16_t *x)
{
return mb_get_mem(mbp, (char *)x, 2);
}
int
mb_get_uint16le(struct mbdata *mbp, u_int16_t *x)
{
u_int16_t v;
int error = mb_get_uint16(mbp, &v);
*x = letohs(v);
return error;
}
int
mb_get_uint16be(struct mbdata *mbp, u_int16_t *x) {
u_int16_t v;
int error = mb_get_uint16(mbp, &v);
*x = betohs(v);
return error;
}
int
mb_get_uint32(struct mbdata *mbp, u_int32_t *x)
{
return mb_get_mem(mbp, (char *)x, 4);
}
int
mb_get_uint32be(struct mbdata *mbp, u_int32_t *x)
{
u_int32_t v;
int error;
error = mb_get_uint32(mbp, &v);
*x = betohl(v);
return error;
}
int
mb_get_uint32le(struct mbdata *mbp, u_int32_t *x)
{
u_int32_t v;
int error;
error = mb_get_uint32(mbp, &v);
*x = letohl(v);
return error;
}
int
mb_get_int64(struct mbdata *mbp, int64_t *x)
{
return mb_get_mem(mbp, (char *)x, 8);
}
int
mb_get_int64be(struct mbdata *mbp, int64_t *x)
{
int64_t v;
int error;
error = mb_get_int64(mbp, &v);
*x = betohq(v);
return error;
}
int
mb_get_int64le(struct mbdata *mbp, int64_t *x)
{
int64_t v;
int error;
error = mb_get_int64(mbp, &v);
*x = letohq(v);
return error;
}
int
mb_get_mem(struct mbdata *mbp, char * target, size_t size)
{
struct mbuf *m = mbp->mb_cur;
u_int count;
while (size > 0) {
if (m == NULL) {
MBERROR("incomplete copy\n");
return EBADRPC;
}
count = mb_left(m, mbp->mb_pos);
if (count == 0) {
mbp->mb_cur = m = m->m_next;
if (m)
mbp->mb_pos = mtod(m, char *);
continue;
}
if (count > size)
count = size;
size -= count;
if (target) {
if (count == 1) {
*target++ = *mbp->mb_pos;
} else {
bcopy(mbp->mb_pos, target, count);
target += count;
}
}
mbp->mb_pos += count;
}
return 0;
}