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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright (c) 1991-2001 by Sun Microsystems, Inc.
     24  * All rights reserved.
     25  */
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 #include <stdio.h>
     30 #include <sys/types.h>
     31 #include <sys/socket.h>
     32 #include <net/if.h>
     33 #include <net/if_arp.h>
     34 #include <netinet/in_systm.h>
     35 #include <netinet/in.h>
     36 #include <netinet/if_ether.h>
     37 
     38 #include <at.h>
     39 #include <snoop.h>
     40 
     41 static char *printat(uint8_t *);
     42 
     43 static char *aarp_opname[] = {
     44 	"",
     45 	"AARP Request",
     46 	"AARP Reply",
     47 	"AARP Probe",
     48 };
     49 
     50 void
     51 interpret_aarp(int flags, char *data, int alen)
     52 {
     53 	/* LINTED */
     54 	struct ether_arp *ap = (struct ether_arp *)data;
     55 
     56 	extern char *dst_name;
     57 
     58 	if (flags & F_SUM) {
     59 		if (alen < sizeof (struct ether_arp)) {
     60 			(void) snprintf(get_sum_line(), MAXLINE,
     61 			    "AARP (short packet)");
     62 			return;
     63 		}
     64 
     65 		switch (ntohs(ap->arp_op)) {
     66 		case AARP_REQ:
     67 			(void) snprintf(get_sum_line(), MAXLINE,
     68 			    "AARP C Who is %s ?",
     69 			    printat(ap->arp_tpa));
     70 			break;
     71 		case AARP_RESP:
     72 			(void) snprintf(get_sum_line(), MAXLINE,
     73 			    "AARP R %s is %s",
     74 			    printat(ap->arp_spa),
     75 			    printether((struct ether_addr *)&ap->arp_sha));
     76 			dst_name = printat(ap->arp_tpa);
     77 			break;
     78 		case AARP_PROBE:
     79 			(void) snprintf(get_sum_line(), MAXLINE,
     80 			    "AARP Probe %s ?",
     81 			    printat(ap->arp_tpa));
     82 			break;
     83 		}
     84 	}
     85 
     86 	if (flags & F_DTAIL) {
     87 		show_header("AARP: ", "AARP Frame", alen);
     88 		show_space();
     89 
     90 		if (alen < sizeof (struct ether_arp)) {
     91 			(void) snprintf(get_line(0, 0), get_line_remain(),
     92 			    "AARP (short packet)");
     93 			return;
     94 		}
     95 
     96 		(void) snprintf(get_line(0, 0), get_line_remain(),
     97 		    "Hardware type = %d",
     98 		    ntohs(ap->arp_hrd));
     99 		(void) snprintf(get_line(0, 0), get_line_remain(),
    100 		    "Protocol type = %04X (%s)",
    101 		    ntohs(ap->arp_pro),
    102 		    print_ethertype(ntohs(ap->arp_pro)));
    103 		(void) snprintf(get_line(0, 0), get_line_remain(),
    104 		    "Length of hardware address = %d bytes",
    105 		    ap->arp_hln);
    106 		(void) snprintf(get_line(0, 0), get_line_remain(),
    107 		    "Length of protocol address = %d bytes",
    108 		    ap->arp_pln);
    109 		(void) snprintf(get_line(0, 0), get_line_remain(),
    110 		    "Opcode %d (%s)",
    111 		    ntohs(ap->arp_op),
    112 		    aarp_opname[ntohs(ap->arp_op)]);
    113 
    114 		if (ntohs(ap->arp_hrd) == ARPHRD_ETHER &&
    115 		    ntohs(ap->arp_pro) == ETHERTYPE_AT) {
    116 			(void) snprintf(get_line(0, 0), get_line_remain(),
    117 			    "Sender's hardware address = %s",
    118 			    printether((struct ether_addr *)&ap->arp_sha));
    119 			(void) snprintf(get_line(0, 0), get_line_remain(),
    120 			    "Sender's protocol address = %s",
    121 			    printat(ap->arp_spa));
    122 			(void) snprintf(get_line(0, 0), get_line_remain(),
    123 			    "Target hardware address = %s",
    124 			    (ntohs(ap->arp_op) == AARP_REQ ||
    125 				ntohs(ap->arp_op) == AARP_PROBE) ? "?" :
    126 			    printether((struct ether_addr *)&ap->arp_tha));
    127 			(void) snprintf(get_line(0, 0), get_line_remain(),
    128 			    "Target protocol address = %s",
    129 			    ntohs(ap->arp_op) == REVARP_REQUEST ? "?" :
    130 			    printat(ap->arp_tpa));
    131 		}
    132 		show_trailer();
    133 	}
    134 }
    135 
    136 static char *
    137 printat(uint8_t *p)
    138 {
    139 	static char buf[16];
    140 
    141 	(void) snprintf(buf, sizeof (buf),  "%d.%d", get_short(&p[1]), p[3]);
    142 	return (buf);
    143 }
    144