xref: /illumos-gate/usr/src/cmd/cmd-inet/usr.sbin/snoop/snoop_rip6.c (revision 2a8bcb4efb45d99ac41c94a75c396b362c414f7f)
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 2005 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #include <ctype.h>
28 #include <fcntl.h>
29 #include <sys/socket.h>
30 #include <sys/types.h>
31 #include <net/if.h>
32 #include <netinet/in_systm.h>
33 #include <netinet/in.h>
34 #include <netinet/ip.h>
35 #include <inet/led.h>
36 #include <inet/ip6.h>
37 #include <arpa/inet.h>
38 #include <protocols/routed.h>
39 #include <protocols/ripngd.h>
40 #include "snoop.h"
41 
42 extern char *dlc_header;
43 static char *show_cmd6();
44 
45 static struct in6_addr all_zeroes_addr = { {	0x0, 0x0, 0x0, 0x0,
46 						0x0, 0x0, 0x0, 0x0,
47 						0x0, 0x0, 0x0, 0x0,
48 						0x0, 0x0, 0x0, 0x0 } };
49 
50 int
interpret_rip6(int flags,struct rip6 * rip6,int fraglen)51 interpret_rip6(int flags, struct rip6 *rip6, int fraglen)
52 {
53 	char *p;
54 	struct netinfo6 *n;
55 	int len, count;
56 	struct in6_addr *dst;
57 	int notdefault = 0;
58 	char dststr[INET6_ADDRSTRLEN];
59 
60 	if (flags & F_SUM) {
61 		switch (rip6->rip6_cmd) {
62 		case RIPCMD6_REQUEST:	p = "C";		break;
63 		case RIPCMD6_RESPONSE:	p = "R";		break;
64 		default: p = "?"; break;
65 		}
66 
67 		switch (rip6->rip6_cmd) {
68 		case RIPCMD6_REQUEST:
69 		case RIPCMD6_RESPONSE:
70 			len = fraglen - 4;
71 			count = 0;
72 			for (n = rip6->rip6_nets;
73 			    len >= sizeof (struct netinfo6); n++) {
74 				count++;
75 				len -= sizeof (struct netinfo6);
76 			}
77 			(void) sprintf(get_sum_line(),
78 			    "RIPng %s (%d destinations)", p, count);
79 			break;
80 		default:
81 			(void) sprintf(get_sum_line(), "RIPng %s", p);
82 			break;
83 		}
84 	}
85 
86 	if (flags & F_DTAIL) {
87 
88 		show_header("RIPng:  ", "Routing Information Protocol for IPv6",
89 		    fraglen);
90 		show_space();
91 		(void) sprintf(get_line((char *)(uintptr_t)rip6->rip6_cmd -
92 		    dlc_header, 1), "Opcode = %d (%s)", rip6->rip6_cmd,
93 		    show_cmd6(rip6->rip6_cmd));
94 		(void) sprintf(get_line((char *)(uintptr_t)rip6->rip6_vers -
95 		    dlc_header, 1), "Version = %d", rip6->rip6_vers);
96 
97 		switch (rip6->rip6_cmd) {
98 		case RIPCMD6_REQUEST:
99 		case RIPCMD6_RESPONSE:
100 			show_space();
101 			(void) sprintf(get_line(0, 0), "Address"
102 			    "                       Prefix        Metric");
103 			len = fraglen - 4;
104 			for (n = rip6->rip6_nets;
105 			    len >= sizeof (struct netinfo6); n++) {
106 				if (rip6->rip6_vers > 0) {
107 					n->rip6_metric = n->rip6_metric;
108 				}
109 				dst = &n->rip6_prefix;
110 				notdefault = bcmp((caddr_t *)dst,
111 				    (caddr_t *)&all_zeroes_addr, sizeof (*dst));
112 				(void) inet_ntop(AF_INET6, (char *)dst, dststr,
113 				    INET6_ADDRSTRLEN);
114 				(void) sprintf(get_line((char *)n - dlc_header,
115 				    sizeof (struct netinfo6)),
116 				    "%-30s %-10d     %-5d %s",
117 				    notdefault ? dststr :
118 				    " (default)", n->rip6_prefix_length,
119 				    n->rip6_metric, n->rip6_metric == 16 ?
120 				    " (not reachable)":"");
121 				len -= sizeof (struct netinfo);
122 			}
123 			break;
124 		}
125 	}
126 	return (fraglen);
127 }
128 
129 static char *
show_cmd6(c)130 show_cmd6(c)
131 	int c;
132 {
133 	switch (c) {
134 	case RIPCMD6_REQUEST:	return ("route request");
135 	case RIPCMD6_RESPONSE:	return ("route response");
136 	}
137 	return ("?");
138 }
139