1/*	$FreeBSD$	*/
2
3/*
4 * Copyright (C) 2000-2005 by Darren Reed.
5 *
6 * See the IPFILTER.LICENCE file for details on licencing.
7 *
8 * $Id: printpacket.c,v 1.12.4.5 2007/09/09 22:15:30 darrenr Exp $
9 */
10
11#include "ipf.h"
12
13#ifndef	IP_OFFMASK
14# define	IP_OFFMASK	0x3fff
15#endif
16
17
18void printpacket(ip)
19struct ip *ip;
20{
21	struct	tcphdr	*tcp;
22	u_short len;
23	u_short off;
24
25	if (IP_V(ip) == 6) {
26		off = 0;
27		len = ntohs(((u_short *)ip)[2]) + 40;
28	} else {
29		off = ntohs(ip->ip_off);
30		len = ntohs(ip->ip_len);
31	}
32
33	if ((opts & OPT_HEX) == OPT_HEX) {
34		u_char *s;
35		int i;
36
37		for (s = (u_char *)ip, i = 0; i < len; i++) {
38			printf("%02x", *s++ & 0xff);
39			if (len - i > 1) {
40				i++;
41				printf("%02x", *s++ & 0xff);
42			}
43			putchar(' ');
44		}
45		putchar('\n');
46		putchar('\n');
47		return;
48	}
49
50	if (IP_V(ip) == 6) {
51		printpacket6(ip);
52		return;
53	}
54
55	tcp = (struct tcphdr *)((char *)ip + (IP_HL(ip) << 2));
56	printf("ip #%d %d(%d) %d", ntohs(ip->ip_id), ntohs(ip->ip_len),
57	       IP_HL(ip) << 2, ip->ip_p);
58	if (off & IP_OFFMASK)
59		printf(" @%d", (off & IP_OFFMASK) << 3);
60	printf(" %s", inet_ntoa(ip->ip_src));
61	if (!(off & IP_OFFMASK))
62		if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
63			printf(",%d", ntohs(tcp->th_sport));
64	printf(" > ");
65	printf("%s", inet_ntoa(ip->ip_dst));
66	if (!(off & IP_OFFMASK)) {
67		if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
68			printf(",%d", ntohs(tcp->th_dport));
69		if ((ip->ip_p == IPPROTO_TCP) && (tcp->th_flags != 0)) {
70			putchar(' ');
71			if (tcp->th_flags & TH_FIN)
72				putchar('F');
73			if (tcp->th_flags & TH_SYN)
74				putchar('S');
75			if (tcp->th_flags & TH_RST)
76				putchar('R');
77			if (tcp->th_flags & TH_PUSH)
78				putchar('P');
79			if (tcp->th_flags & TH_ACK)
80				putchar('A');
81			if (tcp->th_flags & TH_URG)
82				putchar('U');
83			if (tcp->th_flags & TH_ECN)
84				putchar('E');
85			if (tcp->th_flags & TH_CWR)
86				putchar('C');
87		}
88	}
89
90	putchar('\n');
91}
92