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/*
* PPP Memory handling module
*
* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
*
* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the Internet Initiative Japan, Inc. The name of the
* IIJ may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* $Id: mbuf.c,v 1.17 1998/06/16 19:40:20 brian Exp $
*
*/
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <termios.h>
#include "defs.h"
#include "command.h"
#include "mbuf.h"
#include "log.h"
#include "descriptor.h"
#include "prompt.h"
#include "main.h"
static struct memmap {
struct mbuf *queue;
int count;
} MemMap[MB_MAX + 2];
static int totalalloced;
int
mbuf_Length(struct mbuf * bp)
{
int len;
for (len = 0; bp; bp = bp->next)
len += bp->cnt;
return (len);
}
struct mbuf *
mbuf_Alloc(int cnt, int type)
{
u_char *p;
struct mbuf *bp;
if (type > MB_MAX)
log_Printf(LogERROR, "Bad mbuf type %d\n", type);
bp = (struct mbuf *) malloc(sizeof(struct mbuf));
if (bp == NULL) {
log_Printf(LogALERT, "failed to allocate memory: %ld\n",
(long)sizeof(struct mbuf));
AbortProgram(EX_OSERR);
}
memset(bp, '\0', sizeof(struct mbuf));
p = (u_char *) malloc(cnt);
if (p == NULL) {
log_Printf(LogALERT, "failed to allocate memory: %d\n", cnt);
AbortProgram(EX_OSERR);
}
MemMap[type].count += cnt;
totalalloced += cnt;
bp->base = p;
bp->size = bp->cnt = cnt;
bp->type = type;
bp->pnext = NULL;
return (bp);
}
struct mbuf *
mbuf_FreeSeg(struct mbuf * bp)
{
struct mbuf *nbp;
if (bp) {
nbp = bp->next;
MemMap[bp->type].count -= bp->size;
totalalloced -= bp->size;
free(bp->base);
free(bp);
return (nbp);
}
return (bp);
}
void
mbuf_Free(struct mbuf * bp)
{
while (bp)
bp = mbuf_FreeSeg(bp);
}
struct mbuf *
mbuf_Read(struct mbuf * bp, u_char * ptr, int len)
{
int nb;
while (bp && len > 0) {
if (len > bp->cnt)
nb = bp->cnt;
else
nb = len;
memcpy(ptr, MBUF_CTOP(bp), nb);
ptr += nb;
bp->cnt -= nb;
len -= nb;
bp->offset += nb;
if (bp->cnt == 0) {
#ifdef notdef
bp = bp->next;
#else
bp = mbuf_FreeSeg(bp);
#endif
}
}
return (bp);
}
void
mbuf_Write(struct mbuf * bp, u_char * ptr, int cnt)
{
int plen;
int nb;
plen = mbuf_Length(bp);
if (plen < cnt)
cnt = plen;
while (cnt > 0) {
nb = (cnt < bp->cnt) ? cnt : bp->cnt;
memcpy(MBUF_CTOP(bp), ptr, nb);
cnt -= bp->cnt;
bp = bp->next;
}
}
int
mbuf_Show(struct cmdargs const *arg)
{
int i;
static const char *mbuftype[] = {
"async", "fsm", "hdlcout", "ipin", "echo", "lqr", "link", "vjcomp",
"ipq", "mp" };
for (i = 1; i < MB_MAX; i += 2)
prompt_Printf(arg->prompt, "%10.10s: %04d\t%10.10s: %04d\n",
mbuftype[i-1], MemMap[i].count, mbuftype[i], MemMap[i+1].count);
if (i == MB_MAX)
prompt_Printf(arg->prompt, "%10.10s: %04d\n",
mbuftype[i-1], MemMap[i].count);
return 0;
}
void
mbuf_Log()
{
log_Printf(LogDEBUG, "mbuf_Log: mem alloced: %d\n", totalalloced);
log_Printf(LogDEBUG, "mbuf_Log: 1: %d 2: %d 3: %d 4: %d\n",
MemMap[1].count, MemMap[2].count, MemMap[3].count, MemMap[4].count);
log_Printf(LogDEBUG, "mbuf_Log: 5: %d 6: %d 7: %d 8: %d\n",
MemMap[5].count, MemMap[6].count, MemMap[7].count, MemMap[8].count);
log_Printf(LogDEBUG, "mbuf_Log: 9: %d 10: %d\n",
MemMap[9].count, MemMap[10].count);
}
struct mbuf *
mbuf_Dequeue(struct mqueue *q)
{
struct mbuf *bp;
log_Printf(LogDEBUG, "mbuf_Dequeue: queue len = %d\n", q->qlen);
bp = q->top;
if (bp) {
q->top = q->top->pnext;
q->qlen--;
if (q->top == NULL) {
q->last = q->top;
if (q->qlen)
log_Printf(LogERROR, "mbuf_Dequeue: Not zero (%d)!!!\n", q->qlen);
}
bp->pnext = NULL;
}
return bp;
}
void
mbuf_Enqueue(struct mqueue *queue, struct mbuf *bp)
{
if (queue->last) {
queue->last->pnext = bp;
queue->last = bp;
} else
queue->last = queue->top = bp;
queue->qlen++;
log_Printf(LogDEBUG, "mbuf_Enqueue: len = %d\n", queue->qlen);
}
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