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SOURCE.ARC
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TRACE.C
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C/C++ Source or Header
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1989-08-09
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4KB
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185 lines
#include <stdio.h>
#include <ctype.h>
#include "global.h"
#include "mbuf.h"
#include "iface.h"
#include "trace.h"
FILE *trfp = stdout; /* file pointer used for tracing */
int trcount = 0; /* used to close file for flushing */
char trname[40]; /* name if not stdout */
/* Redefined here so that programs calling dump in the library won't pull
* in the rest of the package
*/
static char nospace[] = "No space!!\n";
dump(interface,direction,type,bp)
register struct interface *interface;
int direction;
unsigned type;
struct mbuf *bp;
{
struct mbuf *tbp;
void ascii_dump(),hex_dump();
int ax25_dump(),ether_dump(),ip_dump();
int (*func)();
int16 size;
long trtime;
if((interface->trace & direction) == 0)
return; /* Nothing to trace */
time(&trtime); /* get time to show it in trace */
fprintf(trfp,"%.15s %s ",ctime(&trtime) + 4,interface->name);
switch(direction){
case IF_TRACE_IN:
fprintf(trfp,"recv:\n");
break;
case IF_TRACE_OUT:
fprintf(trfp,"sent:\n");
break;
}
if(bp == NULLBUF || (size = len_mbuf(bp)) == 0){
fprintf(trfp,"empty packet!!\n");
goto trdone;
}
if(type < NTRACE)
func = tracef[type];
else
func = NULLFP;
dup_p(&tbp,bp,0,size);
if(tbp == NULLBUF){
fprintf(trfp,nospace);
if (trfp != stdout)
printf(nospace);
goto trdone;
}
if(func != NULLFP)
(*func)(&tbp,1);
if(interface->trace & IF_TRACE_ASCII){
/* Dump only data portion of packet in ascii */
ascii_dump(&tbp);
} else if(interface->trace & IF_TRACE_HEX){
/* Dump entire packet in hex/ascii */
free_p(tbp);
dup_p(&tbp,bp,0,len_mbuf(bp));
if(tbp != NULLBUF)
hex_dump(&tbp);
else {
fprintf(trfp,nospace);
if (trfp != stdout)
printf(nospace);
}
}
free_p(tbp);
trdone:
if(trfp != stdout){
#ifndef ATARI_ST
fflush(trfp);
#endif
#if (defined(MSDOS) || defined(ATARI_ST))
if(++trcount > 25){
fclose(trfp);
trfp = fopen(trname,"a");
trcount = 0;
}
#endif
if(trfp == NULLFILE || ferror(trfp)){
printf("Error on %s - trace to console\n",trname);
if(trfp != NULLFILE && trfp != stdout)
fclose(trfp);
trfp = stdout;
}
}
fflush(stdout);
}
/* Dump an mbuf in hex */
void
hex_dump(bpp)
register struct mbuf **bpp;
{
int16 n;
int16 address;
void fmtline();
char buf[16];
if(bpp == NULLBUFP || *bpp == NULLBUF)
return;
address = 0;
while((n = pullup(bpp,buf,sizeof(buf))) != 0){
fmtline(address,buf,n);
address += n;
}
}
/* Dump an mbuf in ascii */
void
ascii_dump(bpp)
register struct mbuf **bpp;
{
char c;
register int16 tot;
if(bpp == NULLBUFP || *bpp == NULLBUF)
return;
tot = 0;
while(pullup(bpp,&c,1) == 1){
if((tot % 64) == 0)
fprintf(trfp,"%04x ",tot);
putc(((!isascii(c) || isprint(c)) ? c : '.'),trfp);
if((++tot % 64) == 0)
fprintf(trfp,"\n");
}
if((tot % 64) != 0)
fprintf(trfp,"\n");
}
/* Print a buffer up to 16 bytes long in formatted hex with ascii
* translation, e.g.,
* 0000: 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f 0123456789:;<=>?
*/
void
fmtline(addr,buf,len)
int16 addr;
char *buf;
int16 len;
{
char line[80];
register char *aptr,*cptr;
register char c;
void ctohex();
memset(line,' ',sizeof(line));
ctohex(line,hibyte(addr));
ctohex(line+2,lobyte(addr));
aptr = &line[6];
cptr = &line[55];
while(len-- != 0){
c = *buf++;
ctohex(aptr,(int16)uchar(c));
aptr += 3;
c &= 0x7f;
*cptr++ = (!isascii(c) || isprint(c)) ? c : '.';
}
*cptr = '\0';
fprintf(trfp,"%s\n",line);
}
/* Convert byte to two ascii-hex characters */
static
void
ctohex(buf,c)
register char *buf;
register int16 c;
{
static char hex[] = "0123456789abcdef";
*buf++ = hex[hinibble(c)];
*buf = hex[lonibble(c)];
}