ip.c revision ede723964a065992bf9d0dbe3f780e65ca917872 
1/*
2 * ip.c		"ip" utility frontend.
3 *
4 *		This program is free software; you can redistribute it and/or
5 *		modify it under the terms of the GNU General Public License
6 *		as published by the Free Software Foundation; either version
7 *		2 of the License, or (at your option) any later version.
8 *
9 * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
11 *
12 * Changes:
13 *
14 * Rani Assaf <rani@magic.metawire.com> 980929:	resolve addresses
15 */
16
17#include <stdio.h>
18#include <stdlib.h>
19#include <unistd.h>
20#include <syslog.h>
21#include <fcntl.h>
22#include <sys/socket.h>
23#include <netinet/in.h>
24#include <string.h>
25#include <errno.h>
26
27#include "SNAPSHOT.h"
28#include "utils.h"
29#include "ip_common.h"
30
31int preferred_family = AF_UNSPEC;
32int show_stats = 0;
33int resolve_hosts = 0;
34int oneline = 0;
35int timestamp = 0;
36char * _SL_ = NULL;
37char *batch_file = NULL;
38int force = 0;
39struct rtnl_handle rth;
40
41static void usage(void) __attribute__((noreturn));
42
43static void usage(void)
44{
45	fprintf(stderr,
46"Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n"
47"       ip [ -force ] [-batch filename\n"
48"where  OBJECT := { link | addr | route | rule | neigh | tunnel |\n"
49"                   maddr | mroute | monitor | xfrm }\n"
50"       OPTIONS := { -V[ersion] | -s[tatistics] | -r[esolve] |\n"
51"                    -f[amily] { inet | inet6 | ipx | dnet | link } |\n"
52"                    -o[neline] | -t[imestamp] }\n");
53	exit(-1);
54}
55
56static int do_help(int argc, char **argv)
57{
58	usage();
59}
60
61static const struct cmd {
62	const char *cmd;
63	int (*func)(int argc, char **argv);
64} cmds[] = {
65	{ "address", 	do_ipaddr },
66	{ "maddress",	do_multiaddr },
67	{ "route",	do_iproute },
68	{ "rule",	do_iprule },
69	{ "neighbor",	do_ipneigh },
70	{ "neighbour",	do_ipneigh },
71	{ "link",	do_iplink },
72	{ "tunnel",	do_iptunnel },
73	{ "tunl",	do_iptunnel },
74	{ "monitor",	do_ipmonitor },
75	{ "xfrm",	do_xfrm },
76	{ "mroute",	do_multiroute },
77	{ "help",	do_help },
78	{ 0 }
79};
80
81static int do_cmd(const char *argv0, int argc, char **argv)
82{
83	const struct cmd *c, *m = NULL;
84
85	for (c = cmds; c->cmd; ++c) {
86		if (matches(argv0, c->cmd) == 0) {
87			if (m && m->func != c->func) {
88				fprintf(stderr,
89					"Ambiguious command \"%s\" matches both %s and %s\n",
90					argv0,  m->cmd, c->cmd);
91				return -1;
92			}
93			m = c;
94		}
95	}
96
97	if (m)
98		return m->func(argc-1, argv+1);
99
100	fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0);
101	return -1;
102}
103
104static int batch(const char *name)
105{
106	char *line = NULL;
107	size_t len = 0;
108	int ret = 0;
109	int lineno = 0;
110
111	if (name && strcmp(name, "-") != 0) {
112		if (freopen(name, "r", stdin) == NULL) {
113			fprintf(stderr, "Cannot open file \"%s\" for reading: %s=n",
114				name, strerror(errno));
115			return -1;
116		}
117	}
118
119	if (rtnl_open(&rth, 0) < 0) {
120		fprintf(stderr, "Cannot open rtnetlink\n");
121		return -1;
122	}
123
124	while (getcmdline(&line, &len, stdin) != -1) {
125		char *largv[100];
126		int largc;
127
128		largc = makeargs(line, largv, 100);
129		if (largc == 0)
130			continue;	/* blank line */
131
132		if (do_cmd(largv[0], largc, largv)) {
133			fprintf(stderr, "Command failed %s:%d\n", name, lineno);
134			ret = 1;
135			if (!force)
136				break;
137		}
138	}
139	if (line)
140		free(line);
141
142	rtnl_close(&rth);
143	return ret;
144}
145
146
147int main(int argc, char **argv)
148{
149	char *basename;
150
151	basename = strrchr(argv[0], '/');
152	if (basename == NULL)
153		basename = argv[0];
154	else
155		basename++;
156
157	while (argc > 1) {
158		char *opt = argv[1];
159		if (strcmp(opt,"--") == 0) {
160			argc--; argv++;
161			break;
162		}
163		if (opt[0] != '-')
164			break;
165		if (opt[1] == '-')
166			opt++;
167		if (matches(opt, "-family") == 0) {
168			argc--;
169			argv++;
170			if (argc <= 1)
171				usage();
172			if (strcmp(argv[1], "inet") == 0)
173				preferred_family = AF_INET;
174			else if (strcmp(argv[1], "inet6") == 0)
175				preferred_family = AF_INET6;
176			else if (strcmp(argv[1], "dnet") == 0)
177				preferred_family = AF_DECnet;
178			else if (strcmp(argv[1], "link") == 0)
179				preferred_family = AF_PACKET;
180			else if (strcmp(argv[1], "ipx") == 0)
181				preferred_family = AF_IPX;
182			else if (strcmp(argv[1], "help") == 0)
183				usage();
184			else
185				invarg(argv[1], "invalid protocol family");
186		} else if (strcmp(opt, "-4") == 0) {
187			preferred_family = AF_INET;
188		} else if (strcmp(opt, "-6") == 0) {
189			preferred_family = AF_INET6;
190		} else if (strcmp(opt, "-0") == 0) {
191			preferred_family = AF_PACKET;
192		} else if (strcmp(opt, "-I") == 0) {
193			preferred_family = AF_IPX;
194		} else if (strcmp(opt, "-D") == 0) {
195			preferred_family = AF_DECnet;
196		} else if (matches(opt, "-stats") == 0 ||
197			   matches(opt, "-statistics") == 0) {
198			++show_stats;
199		} else if (matches(opt, "-resolve") == 0) {
200			++resolve_hosts;
201		} else if (matches(opt, "-oneline") == 0) {
202			++oneline;
203		} else if (matches(opt, "-timestamp") == 0) {
204			++timestamp;
205#if 0
206		} else if (matches(opt, "-numeric") == 0) {
207			rtnl_names_numeric++;
208#endif
209		} else if (matches(opt, "-Version") == 0) {
210			printf("ip utility, iproute2-ss%s\n", SNAPSHOT);
211			exit(0);
212		} else if (matches(opt, "-force") == 0) {
213			++force;
214		} else if (matches(opt, "-batch") == 0) {
215			argc--;
216			argv++;
217			if (argc <= 1)
218				usage();
219			batch_file = argv[1];
220		} else if (matches(opt, "-help") == 0) {
221			usage();
222		} else {
223			fprintf(stderr, "Option \"%s\" is unknown, try \"ip -help\".\n", opt);
224			exit(-1);
225		}
226		argc--;	argv++;
227	}
228
229	_SL_ = oneline ? "\\" : "\n" ;
230
231	if (batch_file)
232		return batch(batch_file);
233
234	if (rtnl_open(&rth, 0) < 0)
235		exit(1);
236
237	if (strlen(basename) > 2)
238		return do_cmd(basename+2, argc, argv);
239
240	if (argc > 1)
241		return do_cmd(argv[1], argc-1, argv+1);
242
243	rtnl_close(&rth);
244	usage();
245}
246