1/*
2 * Copyright (C) 1993-2001 by Darren Reed.
3 *
4 * See the IPFILTER.LICENCE file for details on licencing.
5 *
6 * $Id: printpacket.c,v 1.12.4.1 2005/02/21 05:09:24 darrenr Exp $
7 */
8
9#include "ipf.h"
10
11#ifndef	IP_OFFMASK
12# define	IP_OFFMASK	0x3fff
13#endif
14
15
16void printpacket(ip)
17struct ip *ip;
18{
19	struct	tcphdr	*tcp;
20	u_short len;
21	u_short off;
22
23	if (IP_V(ip) == 6) {
24		off = 0;
25		len = ntohs(((u_short *)ip)[2]) + 40;
26	} else {
27		off = ntohs(ip->ip_off);
28		len = ntohs(ip->ip_len);
29	}
30
31	if ((opts & OPT_HEX) == OPT_HEX) {
32		u_char *s;
33		int i;
34
35		for (s = (u_char *)ip, i = 0; i < len; i++) {
36			printf("%02x", *s++ & 0xff);
37			if (len - i > 1) {
38				i++;
39				printf("%02x", *s++ & 0xff);
40			}
41			putchar(' ');
42		}
43		putchar('\n');
44		return;
45	}
46
47	if (IP_V(ip) == 6) {
48		printpacket6(ip);
49		return;
50	}
51
52	tcp = (struct tcphdr *)((char *)ip + (IP_HL(ip) << 2));
53	printf("ip %d(%d) %d", ntohs(ip->ip_len), IP_HL(ip) << 2, ip->ip_p);
54	if (off & IP_OFFMASK)
55		printf(" @%d", off << 3);
56	printf(" %s", inet_ntoa(ip->ip_src));
57	if (!(off & IP_OFFMASK))
58		if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
59			printf(",%d", ntohs(tcp->th_sport));
60	printf(" > ");
61	printf("%s", inet_ntoa(ip->ip_dst));
62	if (!(off & IP_OFFMASK)) {
63		if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
64			printf(",%d", ntohs(tcp->th_dport));
65		if ((ip->ip_p == IPPROTO_TCP) && (tcp->th_flags != 0)) {
66			putchar(' ');
67			if (tcp->th_flags & TH_FIN)
68				putchar('F');
69			if (tcp->th_flags & TH_SYN)
70				putchar('S');
71			if (tcp->th_flags & TH_RST)
72				putchar('R');
73			if (tcp->th_flags & TH_PUSH)
74				putchar('P');
75			if (tcp->th_flags & TH_ACK)
76				putchar('A');
77			if (tcp->th_flags & TH_URG)
78				putchar('U');
79			if (tcp->th_flags & TH_ECN)
80				putchar('E');
81			if (tcp->th_flags & TH_CWR)
82				putchar('C');
83		}
84	}
85
86	putchar('\n');
87}
88