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/* $OpenBSD: ndp.c,v 1.87 2017/10/25 12:09:07 mpi Exp $ */ |
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/* $KAME: ndp.c,v 1.101 2002/07/17 08:46:33 itojun Exp $ */ |
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/* |
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* Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the project nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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/* |
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* Copyright (c) 1984, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* This code is derived from software contributed to Berkeley by |
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* Sun Microsystems, Inc. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
43 |
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* notice, this list of conditions and the following disclaimer. |
44 |
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* 2. Redistributions in binary form must reproduce the above copyright |
45 |
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* notice, this list of conditions and the following disclaimer in the |
46 |
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* documentation and/or other materials provided with the distribution. |
47 |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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/* |
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* Based on: |
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* "@(#) Copyright (c) 1984, 1993\n\ |
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* The Regents of the University of California. All rights reserved.\n"; |
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* |
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* "@(#)arp.c 8.2 (Berkeley) 1/2/94"; |
70 |
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*/ |
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/* |
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* ndp - display, set, delete and flush neighbor cache |
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*/ |
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#include <sys/file.h> |
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#include <sys/ioctl.h> |
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#include <sys/socket.h> |
80 |
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#include <sys/sysctl.h> |
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#include <sys/time.h> |
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#include <sys/queue.h> |
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84 |
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#include <net/if.h> |
85 |
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#include <net/if_dl.h> |
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#include <net/if_types.h> |
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#include <net/route.h> |
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89 |
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#include <netinet/in.h> |
90 |
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91 |
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#include <netinet/icmp6.h> |
92 |
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#include <netinet6/in6_var.h> |
93 |
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#include <netinet6/nd6.h> |
94 |
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95 |
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#include <arpa/inet.h> |
96 |
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97 |
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#include <stdio.h> |
98 |
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#include <errno.h> |
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#include <fcntl.h> |
100 |
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#include <netdb.h> |
101 |
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#include <paths.h> |
102 |
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#include <stdlib.h> |
103 |
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#include <string.h> |
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#include <unistd.h> |
105 |
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#include <limits.h> |
106 |
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#include <err.h> |
107 |
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108 |
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#include "gmt2local.h" |
109 |
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110 |
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/* packing rule for routing socket */ |
111 |
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#define ROUNDUP(a) \ |
112 |
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((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) |
113 |
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114 |
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static pid_t pid; |
115 |
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static int nflag; |
116 |
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static int tflag; |
117 |
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static int32_t thiszone; /* time difference with gmt */ |
118 |
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static int rtsock = -1; |
119 |
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static int repeat = 0; |
120 |
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121 |
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char ntop_buf[INET6_ADDRSTRLEN]; /* inet_ntop() */ |
122 |
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char host_buf[NI_MAXHOST]; /* getnameinfo() */ |
123 |
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char ifix_buf[IFNAMSIZ]; /* if_indextoname() */ |
124 |
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125 |
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int file(char *); |
126 |
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void getsocket(void); |
127 |
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int set(int, char **); |
128 |
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void get(char *); |
129 |
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int delete(char *); |
130 |
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void dump(struct in6_addr *, int); |
131 |
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static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int); |
132 |
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static char *ether_str(struct sockaddr_dl *); |
133 |
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int ndp_ether_aton(char *, u_char *); |
134 |
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void usage(void); |
135 |
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int rtmsg(int); |
136 |
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int rtget(struct sockaddr_in6 **, struct sockaddr_dl **); |
137 |
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void ifinfo(char *); |
138 |
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static char *sec2str(time_t); |
139 |
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static void ts_print(const struct timeval *); |
140 |
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static int rdomain; |
141 |
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142 |
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static char *rtpref_str[] = { |
143 |
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"medium", /* 00 */ |
144 |
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"high", /* 01 */ |
145 |
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"rsv", /* 10 */ |
146 |
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"low" /* 11 */ |
147 |
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}; |
148 |
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149 |
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int |
150 |
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main(int argc, char *argv[]) |
151 |
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{ |
152 |
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int ch; |
153 |
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int mode = 0; |
154 |
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char *arg = NULL; |
155 |
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const char *errstr; |
156 |
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157 |
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pid = getpid(); |
158 |
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thiszone = gmt2local(0); |
159 |
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rdomain = getrtable(); |
160 |
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while ((ch = getopt(argc, argv, "acd:f:i:nstA:V:")) != -1) { |
161 |
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switch (ch) { |
162 |
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case 'a': |
163 |
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case 'c': |
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case 'p': |
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case 'r': |
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case 'P': |
167 |
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case 's': |
168 |
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if (mode) { |
169 |
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usage(); |
170 |
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/*NOTREACHED*/ |
171 |
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} |
172 |
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mode = ch; |
173 |
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arg = NULL; |
174 |
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break; |
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case 'd': |
176 |
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case 'f': |
177 |
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case 'i' : |
178 |
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if (mode) { |
179 |
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usage(); |
180 |
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/*NOTREACHED*/ |
181 |
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} |
182 |
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mode = ch; |
183 |
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arg = optarg; |
184 |
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break; |
185 |
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case 'n': |
186 |
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nflag = 1; |
187 |
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break; |
188 |
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case 't': |
189 |
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tflag = 1; |
190 |
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break; |
191 |
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case 'A': |
192 |
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if (mode) { |
193 |
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usage(); |
194 |
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/*NOTREACHED*/ |
195 |
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} |
196 |
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mode = 'a'; |
197 |
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repeat = strtonum(optarg, 1, INT_MAX, &errstr); |
198 |
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if (errstr) { |
199 |
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usage(); |
200 |
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/*NOTREACHED*/ |
201 |
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} |
202 |
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break; |
203 |
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case 'V': |
204 |
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rdomain = strtonum(optarg, 0, RT_TABLEID_MAX, &errstr); |
205 |
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if (errstr != NULL) { |
206 |
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warn("bad rdomain: %s", errstr); |
207 |
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usage(); |
208 |
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/*NOTREACHED*/ |
209 |
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} |
210 |
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break; |
211 |
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default: |
212 |
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usage(); |
213 |
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} |
214 |
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} |
215 |
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argc -= optind; |
216 |
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argv += optind; |
217 |
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218 |
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switch (mode) { |
219 |
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case 'a': |
220 |
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case 'c': |
221 |
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if (argc != 0) { |
222 |
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usage(); |
223 |
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/*NOTREACHED*/ |
224 |
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} |
225 |
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dump(0, mode == 'c'); |
226 |
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break; |
227 |
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case 'd': |
228 |
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if (argc != 0) { |
229 |
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usage(); |
230 |
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/*NOTREACHED*/ |
231 |
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} |
232 |
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delete(arg); |
233 |
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break; |
234 |
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case 'f': |
235 |
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if (argc != 0) |
236 |
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usage(); |
237 |
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file(arg); |
238 |
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break; |
239 |
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case 'i': |
240 |
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if (argc != 0) |
241 |
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usage(); |
242 |
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ifinfo(arg); |
243 |
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break; |
244 |
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case 's': |
245 |
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if (argc < 2 || argc > 4) |
246 |
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usage(); |
247 |
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exit(set(argc, argv) ? 1 : 0); |
248 |
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case 0: |
249 |
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if (argc != 1) { |
250 |
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usage(); |
251 |
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/*NOTREACHED*/ |
252 |
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} |
253 |
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get(argv[0]); |
254 |
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break; |
255 |
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} |
256 |
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exit(0); |
257 |
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} |
258 |
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|
259 |
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/* |
260 |
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* Process a file to set standard ndp entries |
261 |
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*/ |
262 |
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int |
263 |
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file(char *name) |
264 |
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{ |
265 |
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FILE *fp; |
266 |
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int i, retval; |
267 |
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char line[100], arg[5][50], *args[5]; |
268 |
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269 |
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if ((fp = fopen(name, "r")) == NULL) { |
270 |
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fprintf(stderr, "ndp: cannot open %s\n", name); |
271 |
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exit(1); |
272 |
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} |
273 |
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args[0] = &arg[0][0]; |
274 |
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args[1] = &arg[1][0]; |
275 |
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args[2] = &arg[2][0]; |
276 |
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args[3] = &arg[3][0]; |
277 |
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args[4] = &arg[4][0]; |
278 |
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retval = 0; |
279 |
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|
while (fgets(line, sizeof(line), fp) != NULL) { |
280 |
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i = sscanf(line, "%49s %49s %49s %49s %49s", |
281 |
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arg[0], arg[1], arg[2], arg[3], arg[4]); |
282 |
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if (i < 2) { |
283 |
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|
fprintf(stderr, "ndp: bad line: %s\n", line); |
284 |
|
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retval = 1; |
285 |
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|
continue; |
286 |
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|
} |
287 |
|
|
if (set(i, args)) |
288 |
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|
retval = 1; |
289 |
|
|
} |
290 |
|
|
fclose(fp); |
291 |
|
|
return (retval); |
292 |
|
|
} |
293 |
|
|
|
294 |
|
|
void |
295 |
|
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getsocket(void) |
296 |
|
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{ |
297 |
|
|
socklen_t len = sizeof(rdomain); |
298 |
|
|
|
299 |
|
|
if (rtsock >= 0) |
300 |
|
|
return; |
301 |
|
|
rtsock = socket(PF_ROUTE, SOCK_RAW, 0); |
302 |
|
|
if (rtsock < 0) |
303 |
|
|
err(1, "routing socket"); |
304 |
|
|
if (setsockopt(rtsock, PF_ROUTE, ROUTE_TABLEFILTER, &rdomain, len) < 0) |
305 |
|
|
err(1, "ROUTE_TABLEFILTER"); |
306 |
|
|
|
307 |
|
|
if (pledge("stdio dns flock rpath cpath wpath", NULL) == -1) |
308 |
|
|
err(1, "pledge"); |
309 |
|
|
} |
310 |
|
|
|
311 |
|
|
struct sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 }; |
312 |
|
|
struct sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m; |
313 |
|
|
struct sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m; |
314 |
|
|
struct sockaddr_dl ifp_m = { sizeof(&ifp_m), AF_LINK }; |
315 |
|
|
time_t expire_time; |
316 |
|
|
int flags, found_entry; |
317 |
|
|
struct { |
318 |
|
|
struct rt_msghdr m_rtm; |
319 |
|
|
char m_space[512]; |
320 |
|
|
} m_rtmsg; |
321 |
|
|
|
322 |
|
|
/* |
323 |
|
|
* Set an individual neighbor cache entry |
324 |
|
|
*/ |
325 |
|
|
int |
326 |
|
|
set(int argc, char **argv) |
327 |
|
|
{ |
328 |
|
|
struct sockaddr_in6 *sin = &sin_m; |
329 |
|
|
struct sockaddr_dl *sdl; |
330 |
|
|
struct rt_msghdr *rtm = &(m_rtmsg.m_rtm); |
331 |
|
|
struct addrinfo hints, *res; |
332 |
|
|
int gai_error; |
333 |
|
|
u_char *ea; |
334 |
|
|
char *host = argv[0], *eaddr = argv[1]; |
335 |
|
|
|
336 |
|
|
getsocket(); |
337 |
|
|
argc -= 2; |
338 |
|
|
argv += 2; |
339 |
|
|
sdl_m = blank_sdl; |
340 |
|
|
sin_m = blank_sin; |
341 |
|
|
|
342 |
|
|
bzero(&hints, sizeof(hints)); |
343 |
|
|
hints.ai_family = AF_INET6; |
344 |
|
|
gai_error = getaddrinfo(host, NULL, &hints, &res); |
345 |
|
|
if (gai_error) { |
346 |
|
|
fprintf(stderr, "ndp: %s: %s\n", host, |
347 |
|
|
gai_strerror(gai_error)); |
348 |
|
|
return 1; |
349 |
|
|
} |
350 |
|
|
sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; |
351 |
|
|
#ifdef __KAME__ |
352 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) { |
353 |
|
|
*(u_int16_t *)&sin->sin6_addr.s6_addr[2] = |
354 |
|
|
htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id); |
355 |
|
|
} |
356 |
|
|
#endif |
357 |
|
|
ea = (u_char *)LLADDR(&sdl_m); |
358 |
|
|
if (ndp_ether_aton(eaddr, ea) == 0) |
359 |
|
|
sdl_m.sdl_alen = 6; |
360 |
|
|
expire_time = 0; |
361 |
|
|
flags = 0; |
362 |
|
|
while (argc-- > 0) { |
363 |
|
|
if (strncmp(argv[0], "temp", 4) == 0) { |
364 |
|
|
struct timeval now; |
365 |
|
|
|
366 |
|
|
gettimeofday(&now, 0); |
367 |
|
|
expire_time = now.tv_sec + 20 * 60; |
368 |
|
|
} else if (strncmp(argv[0], "proxy", 5) == 0) |
369 |
|
|
flags |= RTF_ANNOUNCE; |
370 |
|
|
argv++; |
371 |
|
|
} |
372 |
|
|
|
373 |
|
|
if (rtget(&sin, &sdl)) { |
374 |
|
|
errx(1, "RTM_GET(%s) failed", host); |
375 |
|
|
/* NOTREACHED */ |
376 |
|
|
} |
377 |
|
|
|
378 |
|
|
if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { |
379 |
|
|
if (sdl->sdl_family == AF_LINK && |
380 |
|
|
(rtm->rtm_flags & RTF_LLINFO) && |
381 |
|
|
!(rtm->rtm_flags & RTF_GATEWAY)) { |
382 |
|
|
switch (sdl->sdl_type) { |
383 |
|
|
case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: |
384 |
|
|
case IFT_ISO88024: case IFT_ISO88025: |
385 |
|
|
goto overwrite; |
386 |
|
|
} |
387 |
|
|
} |
388 |
|
|
/* |
389 |
|
|
* IPv4 arp command retries with sin_other = SIN_PROXY here. |
390 |
|
|
*/ |
391 |
|
|
fprintf(stderr, "set: cannot configure a new entry\n"); |
392 |
|
|
return 1; |
393 |
|
|
} |
394 |
|
|
|
395 |
|
|
overwrite: |
396 |
|
|
if (sdl->sdl_family != AF_LINK) { |
397 |
|
|
printf("cannot intuit interface index and type for %s\n", host); |
398 |
|
|
return (1); |
399 |
|
|
} |
400 |
|
|
sdl_m.sdl_type = sdl->sdl_type; |
401 |
|
|
sdl_m.sdl_index = sdl->sdl_index; |
402 |
|
|
return (rtmsg(RTM_ADD)); |
403 |
|
|
} |
404 |
|
|
|
405 |
|
|
/* |
406 |
|
|
* Display an individual neighbor cache entry |
407 |
|
|
*/ |
408 |
|
|
void |
409 |
|
|
get(char *host) |
410 |
|
|
{ |
411 |
|
|
struct sockaddr_in6 *sin = &sin_m; |
412 |
|
|
struct addrinfo hints, *res; |
413 |
|
|
int gai_error; |
414 |
|
|
|
415 |
|
|
sin_m = blank_sin; |
416 |
|
|
bzero(&hints, sizeof(hints)); |
417 |
|
|
hints.ai_family = AF_INET6; |
418 |
|
|
gai_error = getaddrinfo(host, NULL, &hints, &res); |
419 |
|
|
if (gai_error) { |
420 |
|
|
fprintf(stderr, "ndp: %s: %s\n", host, |
421 |
|
|
gai_strerror(gai_error)); |
422 |
|
|
return; |
423 |
|
|
} |
424 |
|
|
sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; |
425 |
|
|
#ifdef __KAME__ |
426 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) { |
427 |
|
|
*(u_int16_t *)&sin->sin6_addr.s6_addr[2] = |
428 |
|
|
htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id); |
429 |
|
|
} |
430 |
|
|
#endif |
431 |
|
|
dump(&sin->sin6_addr, 0); |
432 |
|
|
if (found_entry == 0) { |
433 |
|
|
getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, |
434 |
|
|
sizeof(host_buf), NULL ,0, |
435 |
|
|
(nflag ? NI_NUMERICHOST : 0)); |
436 |
|
|
printf("%s (%s) -- no entry\n", host, host_buf); |
437 |
|
|
exit(1); |
438 |
|
|
} |
439 |
|
|
} |
440 |
|
|
|
441 |
|
|
/* |
442 |
|
|
* Delete a neighbor cache entry |
443 |
|
|
*/ |
444 |
|
|
int |
445 |
|
|
delete(char *host) |
446 |
|
|
{ |
447 |
|
|
struct sockaddr_in6 *sin = &sin_m; |
448 |
|
|
struct rt_msghdr *rtm = &m_rtmsg.m_rtm; |
449 |
|
|
struct sockaddr_dl *sdl; |
450 |
|
|
struct addrinfo hints, *res; |
451 |
|
|
int gai_error; |
452 |
|
|
|
453 |
|
|
getsocket(); |
454 |
|
|
sin_m = blank_sin; |
455 |
|
|
|
456 |
|
|
bzero(&hints, sizeof(hints)); |
457 |
|
|
hints.ai_family = AF_INET6; |
458 |
|
|
if (nflag) |
459 |
|
|
hints.ai_flags = AI_NUMERICHOST; |
460 |
|
|
gai_error = getaddrinfo(host, NULL, &hints, &res); |
461 |
|
|
if (gai_error) { |
462 |
|
|
fprintf(stderr, "ndp: %s: %s\n", host, |
463 |
|
|
gai_strerror(gai_error)); |
464 |
|
|
return 1; |
465 |
|
|
} |
466 |
|
|
sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr; |
467 |
|
|
#ifdef __KAME__ |
468 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) { |
469 |
|
|
*(u_int16_t *)&sin->sin6_addr.s6_addr[2] = |
470 |
|
|
htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id); |
471 |
|
|
} |
472 |
|
|
#endif |
473 |
|
|
|
474 |
|
|
if (rtget(&sin, &sdl)) { |
475 |
|
|
errx(1, "RTM_GET(%s) failed", host); |
476 |
|
|
/* NOTREACHED */ |
477 |
|
|
} |
478 |
|
|
|
479 |
|
|
if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) { |
480 |
|
|
if (sdl->sdl_family == AF_LINK && rtm->rtm_flags & RTF_LLINFO) { |
481 |
|
|
if (rtm->rtm_flags & RTF_LOCAL) |
482 |
|
|
return (0); |
483 |
|
|
if (!(rtm->rtm_flags & RTF_GATEWAY)) |
484 |
|
|
goto delete; |
485 |
|
|
} |
486 |
|
|
/* |
487 |
|
|
* IPv4 arp command retries with sin_other = SIN_PROXY here. |
488 |
|
|
*/ |
489 |
|
|
fprintf(stderr, "delete: cannot delete non-NDP entry\n"); |
490 |
|
|
return 1; |
491 |
|
|
} |
492 |
|
|
|
493 |
|
|
delete: |
494 |
|
|
if (sdl->sdl_family != AF_LINK) { |
495 |
|
|
printf("cannot locate %s\n", host); |
496 |
|
|
return (1); |
497 |
|
|
} |
498 |
|
|
if (rtmsg(RTM_DELETE) == 0) { |
499 |
|
|
struct sockaddr_in6 s6 = *sin; /* XXX: for safety */ |
500 |
|
|
|
501 |
|
|
#ifdef __KAME__ |
502 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) { |
503 |
|
|
s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]); |
504 |
|
|
*(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0; |
505 |
|
|
} |
506 |
|
|
#endif |
507 |
|
|
getnameinfo((struct sockaddr *)&s6, |
508 |
|
|
s6.sin6_len, host_buf, |
509 |
|
|
sizeof(host_buf), NULL, 0, |
510 |
|
|
(nflag ? NI_NUMERICHOST : 0)); |
511 |
|
|
printf("%s (%s) deleted\n", host, host_buf); |
512 |
|
|
} |
513 |
|
|
|
514 |
|
|
return 0; |
515 |
|
|
} |
516 |
|
|
|
517 |
|
|
#define W_ADDR 36 |
518 |
|
|
#define W_LL 17 |
519 |
|
|
#define W_IF 7 |
520 |
|
|
|
521 |
|
|
/* |
522 |
|
|
* Dump the entire neighbor cache |
523 |
|
|
*/ |
524 |
|
|
void |
525 |
|
|
dump(struct in6_addr *addr, int cflag) |
526 |
|
|
{ |
527 |
|
|
int mib[7]; |
528 |
|
|
size_t needed; |
529 |
|
|
char *lim, *buf = NULL, *next; |
530 |
|
|
struct rt_msghdr *rtm; |
531 |
|
|
struct sockaddr_in6 *sin; |
532 |
|
|
struct sockaddr_dl *sdl; |
533 |
|
|
struct in6_nbrinfo *nbi; |
534 |
|
|
struct timeval now; |
535 |
|
|
int addrwidth; |
536 |
|
|
int llwidth; |
537 |
|
|
int ifwidth; |
538 |
|
|
char *ifname; |
539 |
|
|
|
540 |
|
|
/* Print header */ |
541 |
|
|
if (!tflag && !cflag) |
542 |
|
|
printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n", |
543 |
|
|
W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address", |
544 |
|
|
W_IF, W_IF, "Netif", "Expire", "S", "Flags"); |
545 |
|
|
|
546 |
|
|
again:; |
547 |
|
|
lim = NULL; |
548 |
|
|
mib[0] = CTL_NET; |
549 |
|
|
mib[1] = PF_ROUTE; |
550 |
|
|
mib[2] = 0; |
551 |
|
|
mib[3] = AF_INET6; |
552 |
|
|
mib[4] = NET_RT_FLAGS; |
553 |
|
|
mib[5] = RTF_LLINFO; |
554 |
|
|
mib[6] = rdomain; |
555 |
|
|
while (1) { |
556 |
|
|
if (sysctl(mib, 7, NULL, &needed, NULL, 0) == -1) |
557 |
|
|
err(1, "sysctl(PF_ROUTE estimate)"); |
558 |
|
|
if (needed == 0) |
559 |
|
|
break; |
560 |
|
|
if ((buf = realloc(buf, needed)) == NULL) |
561 |
|
|
err(1, "realloc"); |
562 |
|
|
if (sysctl(mib, 7, buf, &needed, NULL, 0) == -1) { |
563 |
|
|
if (errno == ENOMEM) |
564 |
|
|
continue; |
565 |
|
|
err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)"); |
566 |
|
|
} |
567 |
|
|
lim = buf + needed; |
568 |
|
|
break; |
569 |
|
|
} |
570 |
|
|
|
571 |
|
|
for (next = buf; next && lim && next < lim; next += rtm->rtm_msglen) { |
572 |
|
|
int isrouter = 0, prbs = 0; |
573 |
|
|
|
574 |
|
|
rtm = (struct rt_msghdr *)next; |
575 |
|
|
if (rtm->rtm_version != RTM_VERSION) |
576 |
|
|
continue; |
577 |
|
|
sin = (struct sockaddr_in6 *)(next + rtm->rtm_hdrlen); |
578 |
|
|
sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len)); |
579 |
|
|
|
580 |
|
|
/* |
581 |
|
|
* Some OSes can produce a route that has the LINK flag but |
582 |
|
|
* has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD |
583 |
|
|
* and BSD/OS, where xx is not the interface identifier on |
584 |
|
|
* lo0). Such routes entry would annoy getnbrinfo() below, |
585 |
|
|
* so we skip them. |
586 |
|
|
* XXX: such routes should have the GATEWAY flag, not the |
587 |
|
|
* LINK flag. However, there is rotten routing software |
588 |
|
|
* that advertises all routes that have the GATEWAY flag. |
589 |
|
|
* Thus, KAME kernel intentionally does not set the LINK flag. |
590 |
|
|
* What is to be fixed is not ndp, but such routing software |
591 |
|
|
* (and the kernel workaround)... |
592 |
|
|
*/ |
593 |
|
|
if (sdl->sdl_family != AF_LINK) |
594 |
|
|
continue; |
595 |
|
|
|
596 |
|
|
if (!(rtm->rtm_flags & RTF_HOST)) |
597 |
|
|
continue; |
598 |
|
|
|
599 |
|
|
if (addr) { |
600 |
|
|
if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr)) |
601 |
|
|
continue; |
602 |
|
|
found_entry = 1; |
603 |
|
|
} else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)) |
604 |
|
|
continue; |
605 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) || |
606 |
|
|
IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) { |
607 |
|
|
/* XXX: should scope id be filled in the kernel? */ |
608 |
|
|
if (sin->sin6_scope_id == 0) |
609 |
|
|
sin->sin6_scope_id = sdl->sdl_index; |
610 |
|
|
#ifdef __KAME__ |
611 |
|
|
/* KAME specific hack; removed the embedded id */ |
612 |
|
|
*(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0; |
613 |
|
|
#endif |
614 |
|
|
} |
615 |
|
|
getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf, |
616 |
|
|
sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0)); |
617 |
|
|
if (cflag) { |
618 |
|
|
if (rtm->rtm_flags & RTF_CLONED) |
619 |
|
|
delete(host_buf); |
620 |
|
|
continue; |
621 |
|
|
} |
622 |
|
|
gettimeofday(&now, 0); |
623 |
|
|
if (tflag) |
624 |
|
|
ts_print(&now); |
625 |
|
|
|
626 |
|
|
addrwidth = strlen(host_buf); |
627 |
|
|
if (addrwidth < W_ADDR) |
628 |
|
|
addrwidth = W_ADDR; |
629 |
|
|
llwidth = strlen(ether_str(sdl)); |
630 |
|
|
if (W_ADDR + W_LL - addrwidth > llwidth) |
631 |
|
|
llwidth = W_ADDR + W_LL - addrwidth; |
632 |
|
|
ifname = if_indextoname(sdl->sdl_index, ifix_buf); |
633 |
|
|
if (!ifname) |
634 |
|
|
ifname = "?"; |
635 |
|
|
ifwidth = strlen(ifname); |
636 |
|
|
if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth) |
637 |
|
|
ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth; |
638 |
|
|
|
639 |
|
|
printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf, |
640 |
|
|
llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname); |
641 |
|
|
|
642 |
|
|
/* Print neighbor discovery specific informations */ |
643 |
|
|
nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1); |
644 |
|
|
if (nbi) { |
645 |
|
|
if (nbi->expire > now.tv_sec) { |
646 |
|
|
printf(" %-9.9s", |
647 |
|
|
sec2str(nbi->expire - now.tv_sec)); |
648 |
|
|
} else if (nbi->expire == 0) |
649 |
|
|
printf(" %-9.9s", "permanent"); |
650 |
|
|
else |
651 |
|
|
printf(" %-9.9s", "expired"); |
652 |
|
|
|
653 |
|
|
switch (nbi->state) { |
654 |
|
|
case ND6_LLINFO_NOSTATE: |
655 |
|
|
printf(" N"); |
656 |
|
|
break; |
657 |
|
|
case ND6_LLINFO_INCOMPLETE: |
658 |
|
|
printf(" I"); |
659 |
|
|
break; |
660 |
|
|
case ND6_LLINFO_REACHABLE: |
661 |
|
|
printf(" R"); |
662 |
|
|
break; |
663 |
|
|
case ND6_LLINFO_STALE: |
664 |
|
|
printf(" S"); |
665 |
|
|
break; |
666 |
|
|
case ND6_LLINFO_DELAY: |
667 |
|
|
printf(" D"); |
668 |
|
|
break; |
669 |
|
|
case ND6_LLINFO_PROBE: |
670 |
|
|
printf(" P"); |
671 |
|
|
break; |
672 |
|
|
default: |
673 |
|
|
printf(" ?"); |
674 |
|
|
break; |
675 |
|
|
} |
676 |
|
|
|
677 |
|
|
isrouter = nbi->isrouter; |
678 |
|
|
prbs = nbi->asked; |
679 |
|
|
} else { |
680 |
|
|
warnx("failed to get neighbor information"); |
681 |
|
|
printf(" "); |
682 |
|
|
} |
683 |
|
|
|
684 |
|
|
printf(" %s%s%s", |
685 |
|
|
(rtm->rtm_flags & RTF_LOCAL) ? "l" : "", |
686 |
|
|
isrouter ? "R" : "", |
687 |
|
|
(rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : ""); |
688 |
|
|
|
689 |
|
|
if (prbs) |
690 |
|
|
printf(" %d", prbs); |
691 |
|
|
|
692 |
|
|
printf("\n"); |
693 |
|
|
} |
694 |
|
|
|
695 |
|
|
if (repeat) { |
696 |
|
|
printf("\n"); |
697 |
|
|
fflush(stdout); |
698 |
|
|
sleep(repeat); |
699 |
|
|
goto again; |
700 |
|
|
} |
701 |
|
|
|
702 |
|
|
free(buf); |
703 |
|
|
} |
704 |
|
|
|
705 |
|
|
static struct in6_nbrinfo * |
706 |
|
|
getnbrinfo(struct in6_addr *addr, int ifindex, int warning) |
707 |
|
|
{ |
708 |
|
|
static struct in6_nbrinfo nbi; |
709 |
|
|
int s; |
710 |
|
|
|
711 |
|
|
if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) |
712 |
|
|
err(1, "socket"); |
713 |
|
|
|
714 |
|
|
bzero(&nbi, sizeof(nbi)); |
715 |
|
|
if_indextoname(ifindex, nbi.ifname); |
716 |
|
|
nbi.addr = *addr; |
717 |
|
|
if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) { |
718 |
|
|
if (warning) |
719 |
|
|
warn("ioctl(SIOCGNBRINFO_IN6)"); |
720 |
|
|
close(s); |
721 |
|
|
return(NULL); |
722 |
|
|
} |
723 |
|
|
|
724 |
|
|
close(s); |
725 |
|
|
return(&nbi); |
726 |
|
|
} |
727 |
|
|
|
728 |
|
|
static char * |
729 |
|
|
ether_str(struct sockaddr_dl *sdl) |
730 |
|
|
{ |
731 |
|
|
static char hbuf[NI_MAXHOST]; |
732 |
|
|
u_char *cp; |
733 |
|
|
|
734 |
|
|
if (sdl->sdl_alen) { |
735 |
|
|
cp = (u_char *)LLADDR(sdl); |
736 |
|
|
snprintf(hbuf, sizeof(hbuf), "%02x:%02x:%02x:%02x:%02x:%02x", |
737 |
|
|
cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]); |
738 |
|
|
} else |
739 |
|
|
snprintf(hbuf, sizeof(hbuf), "(incomplete)"); |
740 |
|
|
|
741 |
|
|
return(hbuf); |
742 |
|
|
} |
743 |
|
|
|
744 |
|
|
int |
745 |
|
|
ndp_ether_aton(char *a, u_char *n) |
746 |
|
|
{ |
747 |
|
|
int i, o[6]; |
748 |
|
|
|
749 |
|
|
i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2], |
750 |
|
|
&o[3], &o[4], &o[5]); |
751 |
|
|
if (i != 6) { |
752 |
|
|
fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a); |
753 |
|
|
return (1); |
754 |
|
|
} |
755 |
|
|
for (i = 0; i < 6; i++) |
756 |
|
|
n[i] = o[i]; |
757 |
|
|
return (0); |
758 |
|
|
} |
759 |
|
|
|
760 |
|
|
void |
761 |
|
|
usage(void) |
762 |
|
|
{ |
763 |
|
|
printf("usage: ndp [-acnt] "); |
764 |
|
|
printf("[-A wait] [-d hostname] [-f filename] [-i interface]\n"); |
765 |
|
|
printf("\t[-s nodename ether_addr [temp] [proxy]] "); |
766 |
|
|
printf("[-V rdomain] [hostname]\n"); |
767 |
|
|
exit(1); |
768 |
|
|
} |
769 |
|
|
|
770 |
|
|
int |
771 |
|
|
rtmsg(int cmd) |
772 |
|
|
{ |
773 |
|
|
static int seq; |
774 |
|
|
int rlen; |
775 |
|
|
struct rt_msghdr *rtm = &m_rtmsg.m_rtm; |
776 |
|
|
char *cp = m_rtmsg.m_space; |
777 |
|
|
int l; |
778 |
|
|
|
779 |
|
|
errno = 0; |
780 |
|
|
if (cmd == RTM_DELETE) |
781 |
|
|
goto doit; |
782 |
|
|
bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); |
783 |
|
|
rtm->rtm_flags = flags; |
784 |
|
|
rtm->rtm_version = RTM_VERSION; |
785 |
|
|
rtm->rtm_tableid = rdomain; |
786 |
|
|
|
787 |
|
|
switch (cmd) { |
788 |
|
|
default: |
789 |
|
|
fprintf(stderr, "ndp: internal wrong cmd\n"); |
790 |
|
|
exit(1); |
791 |
|
|
case RTM_ADD: |
792 |
|
|
rtm->rtm_addrs |= RTA_GATEWAY; |
793 |
|
|
if (expire_time) { |
794 |
|
|
rtm->rtm_rmx.rmx_expire = expire_time; |
795 |
|
|
rtm->rtm_inits = RTV_EXPIRE; |
796 |
|
|
} |
797 |
|
|
rtm->rtm_flags |= (RTF_HOST | RTF_STATIC); |
798 |
|
|
#if 0 /* we don't support ipv6addr/128 type proxying. */ |
799 |
|
|
if (rtm->rtm_flags & RTF_ANNOUNCE) { |
800 |
|
|
rtm->rtm_flags &= ~RTF_HOST; |
801 |
|
|
rtm->rtm_addrs |= RTA_NETMASK; |
802 |
|
|
} |
803 |
|
|
#endif |
804 |
|
|
/* FALLTHROUGH */ |
805 |
|
|
case RTM_GET: |
806 |
|
|
rtm->rtm_addrs |= (RTA_DST | RTA_IFP); |
807 |
|
|
} |
808 |
|
|
#define NEXTADDR(w, s) \ |
809 |
|
|
if (rtm->rtm_addrs & (w)) { \ |
810 |
|
|
bcopy((char *)&s, cp, sizeof(s)); cp += ROUNDUP(sizeof(s));} |
811 |
|
|
|
812 |
|
|
NEXTADDR(RTA_DST, sin_m); |
813 |
|
|
NEXTADDR(RTA_GATEWAY, sdl_m); |
814 |
|
|
#if 0 /* we don't support ipv6addr/128 type proxying. */ |
815 |
|
|
memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr)); |
816 |
|
|
NEXTADDR(RTA_NETMASK, so_mask); |
817 |
|
|
#endif |
818 |
|
|
NEXTADDR(RTA_IFP, ifp_m); |
819 |
|
|
|
820 |
|
|
rtm->rtm_msglen = cp - (char *)&m_rtmsg; |
821 |
|
|
doit: |
822 |
|
|
l = rtm->rtm_msglen; |
823 |
|
|
rtm->rtm_seq = ++seq; |
824 |
|
|
rtm->rtm_type = cmd; |
825 |
|
|
if ((rlen = write(rtsock, (char *)&m_rtmsg, l)) < 0) { |
826 |
|
|
if (errno != ESRCH || cmd != RTM_DELETE) { |
827 |
|
|
err(1, "writing to routing socket"); |
828 |
|
|
/* NOTREACHED */ |
829 |
|
|
} |
830 |
|
|
} |
831 |
|
|
do { |
832 |
|
|
l = read(rtsock, (char *)&m_rtmsg, sizeof(m_rtmsg)); |
833 |
|
|
} while (l > 0 && (rtm->rtm_version != RTM_VERSION || |
834 |
|
|
rtm->rtm_seq != seq || rtm->rtm_pid != pid)); |
835 |
|
|
if (l < 0) |
836 |
|
|
(void) fprintf(stderr, "ndp: read from routing socket: %s\n", |
837 |
|
|
strerror(errno)); |
838 |
|
|
return (0); |
839 |
|
|
} |
840 |
|
|
|
841 |
|
|
int |
842 |
|
|
rtget(struct sockaddr_in6 **sinp, struct sockaddr_dl **sdlp) |
843 |
|
|
{ |
844 |
|
|
struct rt_msghdr *rtm = &(m_rtmsg.m_rtm); |
845 |
|
|
struct sockaddr_in6 *sin = NULL; |
846 |
|
|
struct sockaddr_dl *sdl = NULL; |
847 |
|
|
struct sockaddr *sa; |
848 |
|
|
char *cp; |
849 |
|
|
unsigned int i; |
850 |
|
|
|
851 |
|
|
if (rtmsg(RTM_GET) < 0) |
852 |
|
|
return (1); |
853 |
|
|
|
854 |
|
|
if (rtm->rtm_addrs) { |
855 |
|
|
cp = ((char *)rtm + rtm->rtm_hdrlen); |
856 |
|
|
for (i = 1; i; i <<= 1) { |
857 |
|
|
if (i & rtm->rtm_addrs) { |
858 |
|
|
sa = (struct sockaddr *)cp; |
859 |
|
|
switch (i) { |
860 |
|
|
case RTA_DST: |
861 |
|
|
sin = (struct sockaddr_in6 *)sa; |
862 |
|
|
break; |
863 |
|
|
case RTA_IFP: |
864 |
|
|
sdl = (struct sockaddr_dl *)sa; |
865 |
|
|
break; |
866 |
|
|
default: |
867 |
|
|
break; |
868 |
|
|
} |
869 |
|
|
cp += ROUNDUP(sa->sa_len); |
870 |
|
|
} |
871 |
|
|
} |
872 |
|
|
} |
873 |
|
|
|
874 |
|
|
if (sin == NULL || sdl == NULL) |
875 |
|
|
return (1); |
876 |
|
|
|
877 |
|
|
*sinp = sin; |
878 |
|
|
*sdlp = sdl; |
879 |
|
|
|
880 |
|
|
return (0); |
881 |
|
|
} |
882 |
|
|
|
883 |
|
|
void |
884 |
|
|
ifinfo(char *ifname) |
885 |
|
|
{ |
886 |
|
|
struct in6_ndireq nd; |
887 |
|
|
int i, s; |
888 |
|
|
|
889 |
|
|
if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { |
890 |
|
|
err(1, "socket"); |
891 |
|
|
/* NOTREACHED */ |
892 |
|
|
} |
893 |
|
|
bzero(&nd, sizeof(nd)); |
894 |
|
|
strlcpy(nd.ifname, ifname, sizeof(nd.ifname)); |
895 |
|
|
if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) |
896 |
|
|
err(1, "ioctl(SIOCGIFINFO_IN6)"); |
897 |
|
|
|
898 |
|
|
if (!nd.ndi.initialized) |
899 |
|
|
errx(1, "%s: not initialized yet", ifname); |
900 |
|
|
|
901 |
|
|
printf("basereachable=%ds%dms", |
902 |
|
|
nd.ndi.basereachable / 1000, nd.ndi.basereachable % 1000); |
903 |
|
|
printf(", reachable=%ds", nd.ndi.reachable); |
904 |
|
|
printf(", retrans=%ds%dms\n", nd.ndi.retrans / 1000, |
905 |
|
|
nd.ndi.retrans % 1000); |
906 |
|
|
|
907 |
|
|
close(s); |
908 |
|
|
} |
909 |
|
|
|
910 |
|
|
static char * |
911 |
|
|
sec2str(time_t total) |
912 |
|
|
{ |
913 |
|
|
static char result[256]; |
914 |
|
|
int days, hours, mins, secs; |
915 |
|
|
int first = 1; |
916 |
|
|
char *p = result; |
917 |
|
|
char *ep = &result[sizeof(result)]; |
918 |
|
|
int n; |
919 |
|
|
|
920 |
|
|
days = total / 3600 / 24; |
921 |
|
|
hours = (total / 3600) % 24; |
922 |
|
|
mins = (total / 60) % 60; |
923 |
|
|
secs = total % 60; |
924 |
|
|
|
925 |
|
|
if (days) { |
926 |
|
|
first = 0; |
927 |
|
|
n = snprintf(p, ep - p, "%dd", days); |
928 |
|
|
if (n < 0 || n >= ep - p) |
929 |
|
|
return "?"; |
930 |
|
|
p += n; |
931 |
|
|
} |
932 |
|
|
if (!first || hours) { |
933 |
|
|
first = 0; |
934 |
|
|
n = snprintf(p, ep - p, "%dh", hours); |
935 |
|
|
if (n < 0 || n >= ep - p) |
936 |
|
|
return "?"; |
937 |
|
|
p += n; |
938 |
|
|
} |
939 |
|
|
if (!first || mins) { |
940 |
|
|
first = 0; |
941 |
|
|
n = snprintf(p, ep - p, "%dm", mins); |
942 |
|
|
if (n < 0 || n >= ep - p) |
943 |
|
|
return "?"; |
944 |
|
|
p += n; |
945 |
|
|
} |
946 |
|
|
snprintf(p, ep - p, "%ds", secs); |
947 |
|
|
|
948 |
|
|
return(result); |
949 |
|
|
} |
950 |
|
|
|
951 |
|
|
/* |
952 |
|
|
* Print the timestamp |
953 |
|
|
* from tcpdump/util.c |
954 |
|
|
*/ |
955 |
|
|
static void |
956 |
|
|
ts_print(const struct timeval *tvp) |
957 |
|
|
{ |
958 |
|
|
int s; |
959 |
|
|
|
960 |
|
|
/* Default */ |
961 |
|
|
s = (tvp->tv_sec + thiszone) % 86400; |
962 |
|
|
(void)printf("%02d:%02d:%02d.%06u ", |
963 |
|
|
s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec); |
964 |
|
|
} |