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capinfo.c
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/* $Id: capinfo.c,v 1.5 2003/03/24 04:59:57 aturner Exp $ */
#include "config.h"
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include "err.h"
#include "libpcap.h"
#include "snoop.h"
void print_pcap(struct pcap_info *);
void print_snoop(struct snoop_info *);
void usage();
#ifdef DEBUG
int debug = 0;
#endif
int
main(int argc, char *argv[])
{
struct pcap_info p;
struct snoop_info s;
int i, fd, flag;
if (argc == 0)
usage();
for (i = 1; i < argc; i++) {
flag = 0;
if ((fd = open(argv[i], O_RDONLY, 0)) < 0) {
warn("could not open");
continue;
}
if (is_pcap(fd)) {
stat_pcap(fd, &p);
flag = 1;
printf("%s pcap file\n", argv[1]);
print_pcap(&p);
return 0;
}
/* rewind */
if (lseek(fd, 0, SEEK_SET) != 0)
err(1, "lseek");
if (is_snoop(fd)) {
stat_snoop(fd, &s);
printf("%s snoop file\n", argv[1]);
print_snoop(&s);
return 0;
}
warnx("unknown format");
(void)printf("\n");
}
return 0;
}
void
print_pcap(struct pcap_info *p)
{
char *start, *finish;
printf("\tpcap (%s%s)\n", (p->modified ? "modified, " : ""), p->swapped);
(void)printf("\tversion: %d.%d\n", p->phdr.version_major,
p->phdr.version_minor);
(void)printf("\tzone: %d\n", p->phdr.thiszone);
(void)printf("\tsig figs: %d\n", p->phdr.sigfigs);
(void)printf("\tsnaplen: %d\n", p->phdr.snaplen);
(void)printf("\tlinktype: %s\n", p->linktype);
(void)printf("\t%d packets, %d bytes\n", p->cnt, p->bytes);
if (p->trunc > 0)
(void)printf("\t%d packets truncated (larger than snaplen)\n",
p->trunc);
if (p->cnt > 0) {
start = ctime(&p->start_tm.tv_sec);
(void)printf("\tfirst packet: %s", start);
finish = ctime(&p->finish_tm.tv_sec);
(void)printf("\tlast packet: %s", finish);
}
}
void
print_snoop(struct snoop_info *s)
{
char *start, *finish;
(void)printf("\tversion: %d\n", s->version);
(void)printf("\tlinktype: %s\n", s->linktype);
(void)printf("\t%d packets, %d bytes\n", s->cnt, s->bytes);
if (s->trunc > 0)
(void)printf("\t%d packets truncated (larger than snaplen)\n",
s->trunc);
if (s->cnt > 0) {
start = ctime(&s->start_tm.tv_sec);
(void)printf("\tfirst packet: %s", start);
finish = ctime(&s->finish_tm.tv_sec);
(void)printf("\tlast packet: %s", finish);
}
}
void
usage()
{
(void)fprintf(stderr, "capinfo <files>\n");
exit(1);
}