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RIPDUMP.C
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C/C++ Source or Header
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1991-01-27
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59 lines
/* RIP packet tracing
* Copyright 1991 Phil Karn, KA9Q
*/
#include "global.h"
#include "mbuf.h"
#include "netuser.h"
#include "timer.h"
#include "rip.h"
#include "trace.h"
void
rip_dump(fp,bpp)
FILE *fp;
struct mbuf **bpp;
{
struct rip_route entry;
int i;
int cmd,version;
int16 len;
fprintf(fp,"RIP: ");
cmd = PULLCHAR(bpp);
version = PULLCHAR(bpp);
switch(cmd){
case RIPCMD_REQUEST:
fprintf(fp,"REQUEST");
break;
case RIPCMD_RESPONSE:
fprintf(fp,"RESPONSE");
break;
default:
fprintf(fp," cmd %u",cmd);
break;
}
pull16(bpp); /* remove one word of padding */
len = len_p(*bpp);
fprintf(fp," vers %u entries %u:\n",version,len / RIPROUTE);
i = 0;
while(len >= RIPROUTE){
/* Pull an entry off the packet */
pullentry(&entry,bpp);
len -= RIPROUTE;
if(entry.addr_fam != RIP_IPFAM) {
/* Skip non-IP addresses */
continue;
}
fprintf(fp,"%-16s%-3u ",inet_ntoa(entry.target),entry.metric);
if((++i % 3) == 0){
putc('\n',fp);
}
}
if((i % 3) != 0)
putc('\n',fp);
}