ip.c revision 7397944de6c11519a5951fc1bcff20225e71c4bd 
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#include <stdio.h>
13#include <stdlib.h>
14#include <unistd.h>
15#include <syslog.h>
16#include <fcntl.h>
17#include <sys/socket.h>
18#include <netinet/in.h>
19#include <string.h>
20#include <errno.h>
21
22#include "SNAPSHOT.h"
23#include "utils.h"
24#include "ip_common.h"
25
26int preferred_family = AF_UNSPEC;
27int show_stats = 0;
28int show_details = 0;
29int resolve_hosts = 0;
30int oneline = 0;
31int timestamp = 0;
32char * _SL_ = NULL;
33char *batch_file = NULL;
34int force = 0;
35int max_flush_loops = 10;
36
37struct rtnl_handle rth = { .fd = -1 };
38
39static void usage(void) __attribute__((noreturn));
40
41static void usage(void)
42{
43	fprintf(stderr,
44"Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n"
45"       ip [ -force ] -batch filename\n"
46"where  OBJECT := { link | addr | addrlabel | route | rule | neigh | ntable |\n"
47"                   tunnel | tuntap | maddr | mroute | mrule | monitor | xfrm |\n"
48"                   netns }\n"
49"       OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n"
50"                    -f[amily] { inet | inet6 | ipx | dnet | link } |\n"
51"                    -l[oops] { maximum-addr-flush-attempts } |\n"
52"                    -o[neline] | -t[imestamp] | -b[atch] [filename] |\n"
53"                    -rc[vbuf] [size]}\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	{ "tuntap",	do_iptuntap },
79	{ "tap",	do_iptuntap },
80	{ "monitor",	do_ipmonitor },
81	{ "xfrm",	do_xfrm },
82	{ "mroute",	do_multiroute },
83	{ "mrule",	do_multirule },
84	{ "netns",	do_netns },
85	{ "help",	do_help },
86	{ 0 }
87};
88
89static int do_cmd(const char *argv0, int argc, char **argv)
90{
91	const struct cmd *c;
92
93	for (c = cmds; c->cmd; ++c) {
94		if (matches(argv0, c->cmd) == 0) {
95			return -(c->func(argc-1, argv+1));
96		}
97	}
98
99	fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0);
100	return EXIT_FAILURE;
101}
102
103static int batch(const char *name)
104{
105	char *line = NULL;
106	size_t len = 0;
107	int ret = EXIT_SUCCESS;
108
109	if (name && strcmp(name, "-") != 0) {
110		if (freopen(name, "r", stdin) == NULL) {
111			fprintf(stderr, "Cannot open file \"%s\" for reading: %s\n",
112				name, strerror(errno));
113			return EXIT_FAILURE;
114		}
115	}
116
117	if (rtnl_open(&rth, 0) < 0) {
118		fprintf(stderr, "Cannot open rtnetlink\n");
119		return EXIT_FAILURE;
120	}
121
122	cmdlineno = 0;
123	while (getcmdline(&line, &len, stdin) != -1) {
124		char *largv[100];
125		int largc;
126
127		largc = makeargs(line, largv, 100);
128		if (largc == 0)
129			continue;	/* blank line */
130
131		if (do_cmd(largv[0], largc, largv)) {
132			fprintf(stderr, "Command failed %s:%d\n", name, cmdlineno);
133			ret = EXIT_FAILURE;
134			if (!force)
135				break;
136		}
137	}
138	if (line)
139		free(line);
140
141	rtnl_close(&rth);
142	return ret;
143}
144
145
146int main(int argc, char **argv)
147{
148	char *basename;
149
150	basename = strrchr(argv[0], '/');
151	if (basename == NULL)
152		basename = argv[0];
153	else
154		basename++;
155
156	while (argc > 1) {
157		char *opt = argv[1];
158		if (strcmp(opt,"--") == 0) {
159			argc--; argv++;
160			break;
161		}
162		if (opt[0] != '-')
163			break;
164		if (opt[1] == '-')
165			opt++;
166		if (matches(opt, "-loops") == 0) {
167			argc--;
168			argv++;
169			if (argc <= 1)
170				usage();
171                        max_flush_loops = atoi(argv[1]);
172                } else if (matches(opt, "-family") == 0) {
173			argc--;
174			argv++;
175			if (argc <= 1)
176				usage();
177			if (strcmp(argv[1], "inet") == 0)
178				preferred_family = AF_INET;
179			else if (strcmp(argv[1], "inet6") == 0)
180				preferred_family = AF_INET6;
181			else if (strcmp(argv[1], "dnet") == 0)
182				preferred_family = AF_DECnet;
183			else if (strcmp(argv[1], "link") == 0)
184				preferred_family = AF_PACKET;
185			else if (strcmp(argv[1], "ipx") == 0)
186				preferred_family = AF_IPX;
187			else if (strcmp(argv[1], "help") == 0)
188				usage();
189			else
190				invarg(argv[1], "invalid protocol family");
191		} else if (strcmp(opt, "-4") == 0) {
192			preferred_family = AF_INET;
193		} else if (strcmp(opt, "-6") == 0) {
194			preferred_family = AF_INET6;
195		} else if (strcmp(opt, "-0") == 0) {
196			preferred_family = AF_PACKET;
197		} else if (strcmp(opt, "-I") == 0) {
198			preferred_family = AF_IPX;
199		} else if (strcmp(opt, "-D") == 0) {
200			preferred_family = AF_DECnet;
201		} else if (matches(opt, "-stats") == 0 ||
202			   matches(opt, "-statistics") == 0) {
203			++show_stats;
204		} else if (matches(opt, "-details") == 0) {
205			++show_details;
206		} else if (matches(opt, "-resolve") == 0) {
207			++resolve_hosts;
208		} else if (matches(opt, "-oneline") == 0) {
209			++oneline;
210		} else if (matches(opt, "-timestamp") == 0) {
211			++timestamp;
212#if 0
213		} else if (matches(opt, "-numeric") == 0) {
214			rtnl_names_numeric++;
215#endif
216		} else if (matches(opt, "-Version") == 0) {
217			printf("ip utility, iproute2-ss%s\n", SNAPSHOT);
218			exit(0);
219		} else if (matches(opt, "-force") == 0) {
220			++force;
221		} else if (matches(opt, "-batch") == 0) {
222			argc--;
223			argv++;
224			if (argc <= 1)
225				usage();
226			batch_file = argv[1];
227		} else if (matches(opt, "-rcvbuf") == 0) {
228			unsigned int size;
229
230			argc--;
231			argv++;
232			if (argc <= 1)
233				usage();
234			if (get_unsigned(&size, argv[1], 0)) {
235				fprintf(stderr, "Invalid rcvbuf size '%s'\n",
236					argv[1]);
237				exit(-1);
238			}
239			rcvbuf = size;
240		} else if (matches(opt, "-help") == 0) {
241			usage();
242		} else {
243			fprintf(stderr, "Option \"%s\" is unknown, try \"ip -help\".\n", opt);
244			exit(-1);
245		}
246		argc--;	argv++;
247	}
248
249	_SL_ = oneline ? "\\" : "\n" ;
250
251	if (batch_file)
252		return batch(batch_file);
253
254	if (rtnl_open(&rth, 0) < 0)
255		exit(1);
256
257	if (strlen(basename) > 2)
258		return do_cmd(basename+2, argc, argv);
259
260	if (argc > 1)
261		return do_cmd(argv[1], argc-1, argv+1);
262
263	rtnl_close(&rth);
264	usage();
265}
266