92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
/* $NetBSD: printpacket.c,v 1.1.1.4 2007/04/14 20:17:31 martin Exp $ */
|
|
|
|
/*
|
|
* Copyright (C) 2000-2005 by Darren Reed.
|
|
*
|
|
* See the IPFILTER.LICENCE file for details on licencing.
|
|
*
|
|
* Id: printpacket.c,v 1.12.4.4 2006/09/30 21:44:43 darrenr Exp
|
|
*/
|
|
|
|
#include "ipf.h"
|
|
|
|
#ifndef IP_OFFMASK
|
|
# define IP_OFFMASK 0x3fff
|
|
#endif
|
|
|
|
|
|
void printpacket(ip)
|
|
struct ip *ip;
|
|
{
|
|
struct tcphdr *tcp;
|
|
u_short len;
|
|
u_short off;
|
|
|
|
if (IP_V(ip) == 6) {
|
|
off = 0;
|
|
len = ntohs(((u_short *)ip)[2]) + 40;
|
|
} else {
|
|
off = ntohs(ip->ip_off);
|
|
len = ntohs(ip->ip_len);
|
|
}
|
|
|
|
if ((opts & OPT_HEX) == OPT_HEX) {
|
|
u_char *s;
|
|
int i;
|
|
|
|
for (s = (u_char *)ip, i = 0; i < len; i++) {
|
|
printf("%02x", *s++ & 0xff);
|
|
if (len - i > 1) {
|
|
i++;
|
|
printf("%02x", *s++ & 0xff);
|
|
}
|
|
putchar(' ');
|
|
}
|
|
putchar('\n');
|
|
putchar('\n');
|
|
return;
|
|
}
|
|
|
|
if (IP_V(ip) == 6) {
|
|
printpacket6(ip);
|
|
return;
|
|
}
|
|
|
|
tcp = (struct tcphdr *)((char *)ip + (IP_HL(ip) << 2));
|
|
printf("ip #%d %d(%d) %d", ntohs(ip->ip_id), ntohs(ip->ip_len),
|
|
IP_HL(ip) << 2, ip->ip_p);
|
|
if (off & IP_OFFMASK)
|
|
printf(" @%d", off << 3);
|
|
printf(" %s", inet_ntoa(ip->ip_src));
|
|
if (!(off & IP_OFFMASK))
|
|
if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
|
|
printf(",%d", ntohs(tcp->th_sport));
|
|
printf(" > ");
|
|
printf("%s", inet_ntoa(ip->ip_dst));
|
|
if (!(off & IP_OFFMASK)) {
|
|
if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
|
|
printf(",%d", ntohs(tcp->th_dport));
|
|
if ((ip->ip_p == IPPROTO_TCP) && (tcp->th_flags != 0)) {
|
|
putchar(' ');
|
|
if (tcp->th_flags & TH_FIN)
|
|
putchar('F');
|
|
if (tcp->th_flags & TH_SYN)
|
|
putchar('S');
|
|
if (tcp->th_flags & TH_RST)
|
|
putchar('R');
|
|
if (tcp->th_flags & TH_PUSH)
|
|
putchar('P');
|
|
if (tcp->th_flags & TH_ACK)
|
|
putchar('A');
|
|
if (tcp->th_flags & TH_URG)
|
|
putchar('U');
|
|
if (tcp->th_flags & TH_ECN)
|
|
putchar('E');
|
|
if (tcp->th_flags & TH_CWR)
|
|
putchar('C');
|
|
}
|
|
}
|
|
|
|
putchar('\n');
|
|
}
|