176 lines
3.6 KiB
C
176 lines
3.6 KiB
C
/*
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* PPP Memory handling module
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*
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* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
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*
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* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the Internet Initiative Japan, Inc. The name of the
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* IIJ may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $Id: mbuf.c,v 1.12 1997/12/28 02:56:42 brian Exp $
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*
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*/
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#include <sys/param.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "command.h"
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#include "mbuf.h"
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#include "log.h"
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#include "defs.h"
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#include "loadalias.h"
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#include "vars.h"
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#include "server.h"
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static struct memmap {
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struct mbuf *queue;
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int count;
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} MemMap[MB_MAX + 2];
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static int totalalloced;
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int
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plength(struct mbuf * bp)
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{
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int len;
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for (len = 0; bp; bp = bp->next)
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len += bp->cnt;
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return (len);
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}
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struct mbuf *
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mballoc(int cnt, int type)
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{
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u_char *p;
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struct mbuf *bp;
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if (type > MB_MAX)
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LogPrintf(LogERROR, "Bad mbuf type %d\n", type);
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bp = (struct mbuf *) malloc(sizeof(struct mbuf));
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if (bp == NULL) {
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LogPrintf(LogALERT, "failed to allocate memory: %u\n", sizeof(struct mbuf));
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ServerClose();
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exit(1);
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}
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memset(bp, '\0', sizeof(struct mbuf));
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p = (u_char *) malloc(cnt);
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if (p == NULL) {
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LogPrintf(LogALERT, "failed to allocate memory: %d\n", cnt);
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ServerClose();
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exit(1);
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}
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MemMap[type].count += cnt;
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totalalloced += cnt;
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bp->base = p;
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bp->size = bp->cnt = cnt;
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bp->type = type;
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bp->pnext = NULL;
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return (bp);
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}
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struct mbuf *
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mbfree(struct mbuf * bp)
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{
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struct mbuf *nbp;
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if (bp) {
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nbp = bp->next;
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MemMap[bp->type].count -= bp->size;
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totalalloced -= bp->size;
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free(bp->base);
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free(bp);
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return (nbp);
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}
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return (bp);
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}
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void
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pfree(struct mbuf * bp)
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{
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while (bp)
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bp = mbfree(bp);
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}
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struct mbuf *
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mbread(struct mbuf * bp, u_char * ptr, int len)
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{
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int nb;
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while (bp && len > 0) {
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if (len > bp->cnt)
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nb = bp->cnt;
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else
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nb = len;
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memcpy(ptr, MBUF_CTOP(bp), nb);
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ptr += nb;
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bp->cnt -= nb;
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len -= nb;
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bp->offset += nb;
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if (bp->cnt == 0) {
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#ifdef notdef
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bp = bp->next;
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#else
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bp = mbfree(bp);
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#endif
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}
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}
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return (bp);
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}
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void
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mbwrite(struct mbuf * bp, u_char * ptr, int cnt)
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{
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int plen;
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int nb;
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plen = plength(bp);
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if (plen < cnt)
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cnt = plen;
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while (cnt > 0) {
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nb = (cnt < bp->cnt) ? cnt : bp->cnt;
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memcpy(MBUF_CTOP(bp), ptr, nb);
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cnt -= bp->cnt;
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bp = bp->next;
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}
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}
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int
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ShowMemMap(struct cmdargs const *arg)
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{
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int i;
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if (!VarTerm)
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return 1;
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for (i = 0; i <= MB_MAX; i += 2)
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fprintf(VarTerm, "%d: %d %d: %d\n",
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i, MemMap[i].count, i + 1, MemMap[i + 1].count);
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return 0;
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}
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void
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LogMemory()
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{
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LogPrintf(LogDEBUG, "LogMemory: mem alloced: %d\n", totalalloced);
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LogPrintf(LogDEBUG, "LogMemory: 1: %d 2: %d 3: %d 4: %d\n",
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MemMap[1].count, MemMap[2].count, MemMap[3].count, MemMap[4].count);
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LogPrintf(LogDEBUG, "LogMemory: 5: %d 6: %d 7: %d 8: %d\n",
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MemMap[5].count, MemMap[6].count, MemMap[7].count, MemMap[8].count);
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}
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