d8589bd5cb
Reviewed by: Ian Dowse <iedowse@maths.tcd.ie>, Bosko Milekic <bmilekic@technokratis.com>, Julian Elischer <julian@elischer.org> and arch@/net@ Obtained from: smbfs
550 lines
11 KiB
C
550 lines
11 KiB
C
/*
|
|
* Copyright (c) 2000, 2001 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/module.h>
|
|
#include <sys/uio.h>
|
|
|
|
#include <sys/mchain.h>
|
|
|
|
MODULE_VERSION(libmchain, 1);
|
|
|
|
#define MBERROR(format, args...) printf("%s(%d): "format, __FUNCTION__ , \
|
|
__LINE__ ,## args)
|
|
|
|
#define MBPANIC(format, args...) printf("%s(%d): "format, __FUNCTION__ , \
|
|
__LINE__ ,## args)
|
|
|
|
/*
|
|
* Various helper functions
|
|
*/
|
|
int
|
|
m_fixhdr(struct mbuf *m0)
|
|
{
|
|
struct mbuf *m = m0;
|
|
int len = 0;
|
|
|
|
while (m) {
|
|
len += m->m_len;
|
|
m = m->m_next;
|
|
}
|
|
m0->m_pkthdr.len = len;
|
|
return len;
|
|
}
|
|
|
|
int
|
|
mb_init(struct mbchain *mbp)
|
|
{
|
|
struct mbuf *m;
|
|
|
|
m = m_gethdr(M_TRYWAIT, MT_DATA);
|
|
if (m == NULL)
|
|
return ENOBUFS;
|
|
m->m_pkthdr.rcvif = NULL;
|
|
m->m_len = 0;
|
|
mb_initm(mbp, m);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
mb_initm(struct mbchain *mbp, struct mbuf *m)
|
|
{
|
|
bzero(mbp, sizeof(*mbp));
|
|
mbp->mb_top = mbp->mb_cur = m;
|
|
mbp->mb_mleft = M_TRAILINGSPACE(m);
|
|
}
|
|
|
|
void
|
|
mb_done(struct mbchain *mbp)
|
|
{
|
|
if (mbp->mb_top) {
|
|
m_freem(mbp->mb_top);
|
|
mbp->mb_top = NULL;
|
|
}
|
|
}
|
|
|
|
struct mbuf *
|
|
mb_detach(struct mbchain *mbp)
|
|
{
|
|
struct mbuf *m;
|
|
|
|
m = mbp->mb_top;
|
|
mbp->mb_top = NULL;
|
|
return m;
|
|
}
|
|
|
|
int
|
|
mb_fixhdr(struct mbchain *mbp)
|
|
{
|
|
return mbp->mb_top->m_pkthdr.len = m_fixhdr(mbp->mb_top);
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
* Note: size should be <= MLEN
|
|
*/
|
|
caddr_t
|
|
mb_reserve(struct mbchain *mbp, int size)
|
|
{
|
|
struct mbuf *m, *mn;
|
|
caddr_t bpos;
|
|
|
|
if (size > MLEN)
|
|
panic("mb_reserve: size = %d\n", size);
|
|
m = mbp->mb_cur;
|
|
if (mbp->mb_mleft < size) {
|
|
mn = m_get(M_TRYWAIT, MT_DATA);
|
|
if (mn == NULL)
|
|
return NULL;
|
|
mbp->mb_cur = m->m_next = mn;
|
|
m = mn;
|
|
m->m_len = 0;
|
|
mbp->mb_mleft = M_TRAILINGSPACE(m);
|
|
}
|
|
mbp->mb_mleft -= size;
|
|
mbp->mb_count += size;
|
|
bpos = mtod(m, caddr_t) + m->m_len;
|
|
m->m_len += size;
|
|
return bpos;
|
|
}
|
|
|
|
int
|
|
mb_put_uint8(struct mbchain *mbp, u_int8_t x)
|
|
{
|
|
return mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM);
|
|
}
|
|
|
|
int
|
|
mb_put_uint16be(struct mbchain *mbp, u_int16_t x)
|
|
{
|
|
x = htobes(x);
|
|
return mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM);
|
|
}
|
|
|
|
int
|
|
mb_put_uint16le(struct mbchain *mbp, u_int16_t x)
|
|
{
|
|
x = htoles(x);
|
|
return mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM);
|
|
}
|
|
|
|
int
|
|
mb_put_uint32be(struct mbchain *mbp, u_int32_t x)
|
|
{
|
|
x = htobel(x);
|
|
return mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM);
|
|
}
|
|
|
|
int
|
|
mb_put_uint32le(struct mbchain *mbp, u_int32_t x)
|
|
{
|
|
x = htolel(x);
|
|
return mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM);
|
|
}
|
|
|
|
int
|
|
mb_put_int64be(struct mbchain *mbp, int64_t x)
|
|
{
|
|
x = htobeq(x);
|
|
return mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM);
|
|
}
|
|
|
|
int
|
|
mb_put_int64le(struct mbchain *mbp, int64_t x)
|
|
{
|
|
x = htoleq(x);
|
|
return mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM);
|
|
}
|
|
|
|
int
|
|
mb_put_mem(struct mbchain *mbp, c_caddr_t source, int size, int type)
|
|
{
|
|
struct mbuf *m;
|
|
caddr_t dst;
|
|
c_caddr_t src;
|
|
int cplen, error, mleft, count;
|
|
|
|
m = mbp->mb_cur;
|
|
mleft = mbp->mb_mleft;
|
|
|
|
while (size > 0) {
|
|
if (mleft == 0) {
|
|
if (m->m_next == NULL) {
|
|
m = m_getm(m, size, M_TRYWAIT, MT_DATA);
|
|
if (m == NULL)
|
|
return ENOBUFS;
|
|
}
|
|
m = m->m_next;
|
|
mleft = M_TRAILINGSPACE(m);
|
|
continue;
|
|
}
|
|
cplen = mleft > size ? size : mleft;
|
|
dst = mtod(m, caddr_t) + m->m_len;
|
|
switch (type) {
|
|
case MB_MCUSTOM:
|
|
error = mbp->mb_copy(mbp, source, dst, cplen);
|
|
if (error)
|
|
return error;
|
|
break;
|
|
case MB_MINLINE:
|
|
for (src = source, count = cplen; count; count--)
|
|
*dst++ = *src++;
|
|
break;
|
|
case MB_MSYSTEM:
|
|
bcopy(source, dst, cplen);
|
|
break;
|
|
case MB_MUSER:
|
|
error = copyin(source, dst, cplen);
|
|
if (error)
|
|
return error;
|
|
break;
|
|
case MB_MZERO:
|
|
bzero(dst, cplen);
|
|
break;
|
|
}
|
|
size -= cplen;
|
|
source += cplen;
|
|
m->m_len += cplen;
|
|
mleft -= cplen;
|
|
mbp->mb_count += cplen;
|
|
}
|
|
mbp->mb_cur = m;
|
|
mbp->mb_mleft = mleft;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
mb_put_mbuf(struct mbchain *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_mleft = M_TRAILINGSPACE(m);
|
|
mbp->mb_cur = m;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* copies a uio scatter/gather list to an mbuf chain.
|
|
* NOTE: can ony handle iovcnt == 1
|
|
*/
|
|
int
|
|
mb_put_uio(struct mbchain *mbp, struct uio *uiop, int size)
|
|
{
|
|
long left;
|
|
int mtype, error;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (uiop->uio_iovcnt != 1)
|
|
MBPANIC("iovcnt != 1");
|
|
#endif
|
|
mtype = (uiop->uio_segflg == UIO_SYSSPACE) ? MB_MSYSTEM : MB_MUSER;
|
|
|
|
while (size > 0) {
|
|
left = uiop->uio_iov->iov_len;
|
|
if (left > size)
|
|
left = size;
|
|
error = mb_put_mem(mbp, uiop->uio_iov->iov_base, left, mtype);
|
|
if (error)
|
|
return error;
|
|
uiop->uio_offset += left;
|
|
uiop->uio_resid -= left;
|
|
uiop->uio_iov->iov_base += left;
|
|
uiop->uio_iov->iov_len -= left;
|
|
size -= left;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Routines for fetching data from an mbuf chain
|
|
*/
|
|
int
|
|
md_init(struct mdchain *mdp)
|
|
{
|
|
struct mbuf *m;
|
|
|
|
m = m_gethdr(M_TRYWAIT, MT_DATA);
|
|
if (m == NULL)
|
|
return ENOBUFS;
|
|
m->m_pkthdr.rcvif = NULL;
|
|
m->m_len = 0;
|
|
md_initm(mdp, m);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
md_initm(struct mdchain *mdp, struct mbuf *m)
|
|
{
|
|
bzero(mdp, sizeof(*mdp));
|
|
mdp->md_top = mdp->md_cur = m;
|
|
mdp->md_pos = mtod(m, u_char*);
|
|
}
|
|
|
|
void
|
|
md_done(struct mdchain *mdp)
|
|
{
|
|
if (mdp->md_top) {
|
|
m_freem(mdp->md_top);
|
|
mdp->md_top = NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Append a separate mbuf chain. It is caller responsibility to prevent
|
|
* multiple calls to fetch/record routines.
|
|
*/
|
|
void
|
|
md_append_record(struct mdchain *mdp, struct mbuf *top)
|
|
{
|
|
struct mbuf *m;
|
|
|
|
if (mdp->md_top == NULL) {
|
|
md_initm(mdp, top);
|
|
return;
|
|
}
|
|
m = mdp->md_top;
|
|
while (m->m_nextpkt)
|
|
m = m->m_nextpkt;
|
|
m->m_nextpkt = top;
|
|
top->m_nextpkt = NULL;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Put next record in place of existing
|
|
*/
|
|
int
|
|
md_next_record(struct mdchain *mdp)
|
|
{
|
|
struct mbuf *m;
|
|
|
|
if (mdp->md_top == NULL)
|
|
return ENOENT;
|
|
m = mdp->md_top->m_nextpkt;
|
|
md_done(mdp);
|
|
if (m == NULL)
|
|
return ENOENT;
|
|
md_initm(mdp, m);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
md_get_uint8(struct mdchain *mdp, u_int8_t *x)
|
|
{
|
|
return md_get_mem(mdp, x, 1, MB_MINLINE);
|
|
}
|
|
|
|
int
|
|
md_get_uint16(struct mdchain *mdp, u_int16_t *x)
|
|
{
|
|
return md_get_mem(mdp, (caddr_t)x, 2, MB_MINLINE);
|
|
}
|
|
|
|
int
|
|
md_get_uint16le(struct mdchain *mdp, u_int16_t *x)
|
|
{
|
|
u_int16_t v;
|
|
int error = md_get_uint16(mdp, &v);
|
|
|
|
*x = letohs(v);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
md_get_uint16be(struct mdchain *mdp, u_int16_t *x) {
|
|
u_int16_t v;
|
|
int error = md_get_uint16(mdp, &v);
|
|
|
|
*x = betohs(v);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
md_get_uint32(struct mdchain *mdp, u_int32_t *x)
|
|
{
|
|
return md_get_mem(mdp, (caddr_t)x, 4, MB_MINLINE);
|
|
}
|
|
|
|
int
|
|
md_get_uint32be(struct mdchain *mdp, u_int32_t *x)
|
|
{
|
|
u_int32_t v;
|
|
int error;
|
|
|
|
error = md_get_uint32(mdp, &v);
|
|
*x = betohl(v);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
md_get_uint32le(struct mdchain *mdp, u_int32_t *x)
|
|
{
|
|
u_int32_t v;
|
|
int error;
|
|
|
|
error = md_get_uint32(mdp, &v);
|
|
*x = letohl(v);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
md_get_int64(struct mdchain *mdp, int64_t *x)
|
|
{
|
|
return md_get_mem(mdp, (caddr_t)x, 8, MB_MINLINE);
|
|
}
|
|
|
|
int
|
|
md_get_int64be(struct mdchain *mdp, int64_t *x)
|
|
{
|
|
int64_t v;
|
|
int error;
|
|
|
|
error = md_get_int64(mdp, &v);
|
|
*x = betohq(v);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
md_get_int64le(struct mdchain *mdp, int64_t *x)
|
|
{
|
|
int64_t v;
|
|
int error;
|
|
|
|
error = md_get_int64(mdp, &v);
|
|
*x = letohq(v);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
md_get_mem(struct mdchain *mdp, caddr_t target, int size, int type)
|
|
{
|
|
struct mbuf *m = mdp->md_cur;
|
|
int error;
|
|
u_int count;
|
|
u_char *s;
|
|
|
|
while (size > 0) {
|
|
if (m == NULL) {
|
|
MBERROR("incomplete copy\n");
|
|
return EBADRPC;
|
|
}
|
|
s = mdp->md_pos;
|
|
count = mtod(m, u_char*) + m->m_len - s;
|
|
if (count == 0) {
|
|
mdp->md_cur = m = m->m_next;
|
|
if (m)
|
|
s = mdp->md_pos = mtod(m, caddr_t);
|
|
continue;
|
|
}
|
|
if (count > size)
|
|
count = size;
|
|
size -= count;
|
|
mdp->md_pos += count;
|
|
if (target == NULL)
|
|
continue;
|
|
switch (type) {
|
|
case MB_MUSER:
|
|
error = copyout(s, target, count);
|
|
if (error)
|
|
return error;
|
|
break;
|
|
case MB_MSYSTEM:
|
|
bcopy(s, target, count);
|
|
break;
|
|
case MB_MINLINE:
|
|
while (count--)
|
|
*target++ = *s++;
|
|
continue;
|
|
}
|
|
target += count;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
md_get_mbuf(struct mdchain *mdp, int size, struct mbuf **ret)
|
|
{
|
|
struct mbuf *m = mdp->md_cur, *rm;
|
|
|
|
rm = m_copym(m, mdp->md_pos - mtod(m, u_char*), size, M_TRYWAIT);
|
|
if (rm == NULL)
|
|
return EBADRPC;
|
|
md_get_mem(mdp, NULL, size, MB_MZERO);
|
|
*ret = rm;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
md_get_uio(struct mdchain *mdp, struct uio *uiop, int size)
|
|
{
|
|
char *uiocp;
|
|
long left;
|
|
int mtype, error;
|
|
|
|
mtype = (uiop->uio_segflg == UIO_SYSSPACE) ? MB_MSYSTEM : MB_MUSER;
|
|
while (size > 0) {
|
|
if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL)
|
|
return EFBIG;
|
|
left = uiop->uio_iov->iov_len;
|
|
uiocp = uiop->uio_iov->iov_base;
|
|
if (left > size)
|
|
left = size;
|
|
error = md_get_mem(mdp, uiocp, left, mtype);
|
|
if (error)
|
|
return error;
|
|
uiop->uio_offset += left;
|
|
uiop->uio_resid -= left;
|
|
if (uiop->uio_iov->iov_len <= size) {
|
|
uiop->uio_iovcnt--;
|
|
uiop->uio_iov++;
|
|
} else {
|
|
uiop->uio_iov->iov_base += left;
|
|
uiop->uio_iov->iov_len -= left;
|
|
}
|
|
size -= left;
|
|
}
|
|
return 0;
|
|
}
|