/*
 * Copyright (C) 1993-2001 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 * $Id: printpacket.c,v 1.12.4.1 2005/02/21 05:09:24 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');
                return;
        }

        if (IP_V(ip) == 6) {
                printpacket6(ip);
                return;
        }

        tcp = (struct tcphdr *)((char *)ip + (IP_HL(ip) << 2));
        printf("ip %d(%d) %d", 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');
}