ip.c revision 4759758c05b3bda53b743a1c3238f1479bb61b43 
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 show_details = 0;
34int resolve_hosts = 0;
35int oneline = 0;
36int timestamp = 0;
37char * _SL_ = NULL;
38char *batch_file = NULL;
39int force = 0;
40struct rtnl_handle rth = { .fd = -1 };
41
42static void usage(void) __attribute__((noreturn));
43
44static void usage(void)
45{
46	fprintf(stderr,
47"Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n"
48"       ip [ -force ] [-batch filename\n"
49"where  OBJECT := { link | addr | addrlabel | route | rule | neigh | ntable |\n"
50"                   tunnel | maddr | mroute | monitor | xfrm }\n"
51"       OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n"
52"                    -f[amily] { inet | inet6 | ipx | dnet | link } |\n"
53"                    -o[neline] | -t[imestamp] }\n");
54	exit(-1);
55}
56
57static int do_help(int argc, char **argv)
58{
59	usage();
60}
61
62static const struct cmd {
63	const char *cmd;
64	int (*func)(int argc, char **argv);
65} cmds[] = {
66	{ "address", 	do_ipaddr },
67	{ "addrlabel",	do_ipaddrlabel },
68	{ "maddress",	do_multiaddr },
69	{ "route",	do_iproute },
70	{ "rule",	do_iprule },
71	{ "neighbor",	do_ipneigh },
72	{ "neighbour",	do_ipneigh },
73	{ "ntable",	do_ipntable },
74	{ "ntbl",	do_ipntable },
75	{ "link",	do_iplink },
76	{ "tunnel",	do_iptunnel },
77	{ "tunl",	do_iptunnel },
78	{ "monitor",	do_ipmonitor },
79	{ "xfrm",	do_xfrm },
80	{ "mroute",	do_multiroute },
81	{ "help",	do_help },
82	{ 0 }
83};
84
85static int do_cmd(const char *argv0, int argc, char **argv)
86{
87	const struct cmd *c;
88
89	for (c = cmds; c->cmd; ++c) {
90		if (matches(argv0, c->cmd) == 0)
91			return c->func(argc-1, argv+1);
92	}
93
94	fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0);
95	return -1;
96}
97
98static int batch(const char *name)
99{
100	char *line = NULL;
101	size_t len = 0;
102	int ret = 0;
103	int lineno = 0;
104
105	if (name && strcmp(name, "-") != 0) {
106		if (freopen(name, "r", stdin) == NULL) {
107			fprintf(stderr, "Cannot open file \"%s\" for reading: %s\n",
108				name, strerror(errno));
109			return -1;
110		}
111	}
112
113	if (rtnl_open(&rth, 0) < 0) {
114		fprintf(stderr, "Cannot open rtnetlink\n");
115		return -1;
116	}
117
118	while (getcmdline(&line, &len, stdin) != -1) {
119		char *largv[100];
120		int largc;
121
122		largc = makeargs(line, largv, 100);
123		if (largc == 0)
124			continue;	/* blank line */
125
126		if (do_cmd(largv[0], largc, largv)) {
127			fprintf(stderr, "Command failed %s:%d\n", name, lineno);
128			ret = 1;
129			if (!force)
130				break;
131		}
132	}
133	if (line)
134		free(line);
135
136	rtnl_close(&rth);
137	return ret;
138}
139
140
141int main(int argc, char **argv)
142{
143	char *basename;
144
145	basename = strrchr(argv[0], '/');
146	if (basename == NULL)
147		basename = argv[0];
148	else
149		basename++;
150
151	while (argc > 1) {
152		char *opt = argv[1];
153		if (strcmp(opt,"--") == 0) {
154			argc--; argv++;
155			break;
156		}
157		if (opt[0] != '-')
158			break;
159		if (opt[1] == '-')
160			opt++;
161		if (matches(opt, "-family") == 0) {
162			argc--;
163			argv++;
164			if (argc <= 1)
165				usage();
166			if (strcmp(argv[1], "inet") == 0)
167				preferred_family = AF_INET;
168			else if (strcmp(argv[1], "inet6") == 0)
169				preferred_family = AF_INET6;
170			else if (strcmp(argv[1], "dnet") == 0)
171				preferred_family = AF_DECnet;
172			else if (strcmp(argv[1], "link") == 0)
173				preferred_family = AF_PACKET;
174			else if (strcmp(argv[1], "ipx") == 0)
175				preferred_family = AF_IPX;
176			else if (strcmp(argv[1], "help") == 0)
177				usage();
178			else
179				invarg(argv[1], "invalid protocol family");
180		} else if (strcmp(opt, "-4") == 0) {
181			preferred_family = AF_INET;
182		} else if (strcmp(opt, "-6") == 0) {
183			preferred_family = AF_INET6;
184		} else if (strcmp(opt, "-0") == 0) {
185			preferred_family = AF_PACKET;
186		} else if (strcmp(opt, "-I") == 0) {
187			preferred_family = AF_IPX;
188		} else if (strcmp(opt, "-D") == 0) {
189			preferred_family = AF_DECnet;
190		} else if (matches(opt, "-stats") == 0 ||
191			   matches(opt, "-statistics") == 0) {
192			++show_stats;
193		} else if (matches(opt, "-details") == 0) {
194			++show_details;
195		} else if (matches(opt, "-resolve") == 0) {
196			++resolve_hosts;
197		} else if (matches(opt, "-oneline") == 0) {
198			++oneline;
199		} else if (matches(opt, "-timestamp") == 0) {
200			++timestamp;
201#if 0
202		} else if (matches(opt, "-numeric") == 0) {
203			rtnl_names_numeric++;
204#endif
205		} else if (matches(opt, "-Version") == 0) {
206			printf("ip utility, iproute2-ss%s\n", SNAPSHOT);
207			exit(0);
208		} else if (matches(opt, "-force") == 0) {
209			++force;
210		} else if (matches(opt, "-batch") == 0) {
211			argc--;
212			argv++;
213			if (argc <= 1)
214				usage();
215			batch_file = argv[1];
216		} else if (matches(opt, "-help") == 0) {
217			usage();
218		} else {
219			fprintf(stderr, "Option \"%s\" is unknown, try \"ip -help\".\n", opt);
220			exit(-1);
221		}
222		argc--;	argv++;
223	}
224
225	_SL_ = oneline ? "\\" : "\n" ;
226
227	if (batch_file)
228		return batch(batch_file);
229
230	if (rtnl_open(&rth, 0) < 0)
231		exit(1);
232
233	if (strlen(basename) > 2)
234		return do_cmd(basename+2, argc, argv);
235
236	if (argc > 1)
237		return do_cmd(argv[1], argc-1, argv+1);
238
239	rtnl_close(&rth);
240	usage();
241}
242