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Internet Info 1994 March
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Internet Info CD-ROM (Walnut Creek) (March 1994).iso
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networking
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alpha.arc
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TRACE.C
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C/C++ Source or Header
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1988-07-08
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3KB
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156 lines
#include <stdio.h>
#include <ctype.h>
#include "global.h"
#include "mbuf.h"
#include "iface.h"
#include "trace.h"
/* 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;
if((interface->trace & direction) == 0)
return; /* Nothing to trace */
switch(direction){
case IF_TRACE_IN:
printf("%s recv:\n",interface->name);
break;
case IF_TRACE_OUT:
printf("%s sent:\n",interface->name);
break;
}
if(bp == NULLBUF || (size = len_mbuf(bp)) == 0){
printf("empty packet!!\n");
fflush(stdout);
return;
}
if(type < NTRACE)
func = tracef[type];
else
func = NULLFP;
dup_p(&tbp,bp,0,size);
if(tbp == NULLBUF){
printf(nospace);
fflush(stdout);
return;
}
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
printf(nospace);
}
free_p(tbp);
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)
printf("%04x ",tot);
putchar(isprint(c) ? c : '.');
if((++tot % 64) == 0)
printf("\n");
}
if((tot % 64) != 0)
printf("\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++ = isprint(c) ? c : '.';
}
*cptr++ = '\r';
*cptr++ = '\n';
fwrite(line,1,(unsigned)(cptr-line),stdout);
}
/* 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)];
}