/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 1991-2001 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>

#include <at.h>
#include <snoop.h>

static char *printat(uint8_t *);

static char *aarp_opname[] = {
        "",
        "AARP Request",
        "AARP Reply",
        "AARP Probe",
};

void
interpret_aarp(int flags, char *data, int alen)
{
        /* LINTED */
        struct ether_arp *ap = (struct ether_arp *)data;

        extern char *dst_name;

        if (flags & F_SUM) {
                if (alen < sizeof (struct ether_arp)) {
                        (void) snprintf(get_sum_line(), MAXLINE,
                            "AARP (short packet)");
                        return;
                }

                switch (ntohs(ap->arp_op)) {
                case AARP_REQ:
                        (void) snprintf(get_sum_line(), MAXLINE,
                            "AARP C Who is %s ?",
                            printat(ap->arp_tpa));
                        break;
                case AARP_RESP:
                        (void) snprintf(get_sum_line(), MAXLINE,
                            "AARP R %s is %s",
                            printat(ap->arp_spa),
                            printether((struct ether_addr *)&ap->arp_sha));
                        dst_name = printat(ap->arp_tpa);
                        break;
                case AARP_PROBE:
                        (void) snprintf(get_sum_line(), MAXLINE,
                            "AARP Probe %s ?",
                            printat(ap->arp_tpa));
                        break;
                }
        }

        if (flags & F_DTAIL) {
                show_header("AARP: ", "AARP Frame", alen);
                show_space();

                if (alen < sizeof (struct ether_arp)) {
                        (void) snprintf(get_line(0, 0), get_line_remain(),
                            "AARP (short packet)");
                        return;
                }

                (void) snprintf(get_line(0, 0), get_line_remain(),
                    "Hardware type = %d",
                    ntohs(ap->arp_hrd));
                (void) snprintf(get_line(0, 0), get_line_remain(),
                    "Protocol type = %04X (%s)",
                    ntohs(ap->arp_pro),
                    print_ethertype(ntohs(ap->arp_pro)));
                (void) snprintf(get_line(0, 0), get_line_remain(),
                    "Length of hardware address = %d bytes",
                    ap->arp_hln);
                (void) snprintf(get_line(0, 0), get_line_remain(),
                    "Length of protocol address = %d bytes",
                    ap->arp_pln);
                (void) snprintf(get_line(0, 0), get_line_remain(),
                    "Opcode %d (%s)",
                    ntohs(ap->arp_op),
                    aarp_opname[ntohs(ap->arp_op)]);

                if (ntohs(ap->arp_hrd) == ARPHRD_ETHER &&
                    ntohs(ap->arp_pro) == ETHERTYPE_AT) {
                        (void) snprintf(get_line(0, 0), get_line_remain(),
                            "Sender's hardware address = %s",
                            printether((struct ether_addr *)&ap->arp_sha));
                        (void) snprintf(get_line(0, 0), get_line_remain(),
                            "Sender's protocol address = %s",
                            printat(ap->arp_spa));
                        (void) snprintf(get_line(0, 0), get_line_remain(),
                            "Target hardware address = %s",
                            (ntohs(ap->arp_op) == AARP_REQ ||
                                ntohs(ap->arp_op) == AARP_PROBE) ? "?" :
                            printether((struct ether_addr *)&ap->arp_tha));
                        (void) snprintf(get_line(0, 0), get_line_remain(),
                            "Target protocol address = %s",
                            ntohs(ap->arp_op) == REVARP_REQUEST ? "?" :
                            printat(ap->arp_tpa));
                }
                show_trailer();
        }
}

static char *
printat(uint8_t *p)
{
        static char buf[16];

        (void) snprintf(buf, sizeof (buf),  "%d.%d", get_short(&p[1]), p[3]);
        return (buf);
}