ip.c revision 232642c28c5320e6cf1e32f667f866c5f7372bfe 
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;
35struct rtnl_handle rth = { .fd = -1 };
36
37static void usage(void) __attribute__((noreturn));
38
39static void usage(void)
40{
41	fprintf(stderr,
42"Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n"
43"       ip [ -force ] -batch filename\n"
44"where  OBJECT := { link | addr | addrlabel | route | rule | neigh | ntable |\n"
45"                   tunnel | maddr | mroute | monitor | xfrm }\n"
46"       OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n"
47"                    -f[amily] { inet | inet6 | ipx | dnet | link } |\n"
48"                    -o[neline] | -t[imestamp] | -b[atch] [filename] |\n"
49"                    -rc[vbuf] [size]}\n");
50	exit(-1);
51}
52
53static int do_help(int argc, char **argv)
54{
55	usage();
56}
57
58static const struct cmd {
59	const char *cmd;
60	int (*func)(int argc, char **argv);
61} cmds[] = {
62	{ "address", 	do_ipaddr },
63	{ "addrlabel",	do_ipaddrlabel },
64	{ "maddress",	do_multiaddr },
65	{ "route",	do_iproute },
66	{ "rule",	do_iprule },
67	{ "neighbor",	do_ipneigh },
68	{ "neighbour",	do_ipneigh },
69	{ "ntable",	do_ipntable },
70	{ "ntbl",	do_ipntable },
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;
84
85	for (c = cmds; c->cmd; ++c) {
86		if (matches(argv0, c->cmd) == 0)
87			return c->func(argc-1, argv+1);
88	}
89
90	fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0);
91	return -1;
92}
93
94static int batch(const char *name)
95{
96	char *line = NULL;
97	size_t len = 0;
98	int ret = 0;
99	int lineno = 0;
100
101	if (name && strcmp(name, "-") != 0) {
102		if (freopen(name, "r", stdin) == NULL) {
103			fprintf(stderr, "Cannot open file \"%s\" for reading: %s\n",
104				name, strerror(errno));
105			return -1;
106		}
107	}
108
109	if (rtnl_open(&rth, 0) < 0) {
110		fprintf(stderr, "Cannot open rtnetlink\n");
111		return -1;
112	}
113
114	while (getcmdline(&line, &len, stdin) != -1) {
115		char *largv[100];
116		int largc;
117
118		largc = makeargs(line, largv, 100);
119		if (largc == 0)
120			continue;	/* blank line */
121
122		if (do_cmd(largv[0], largc, largv)) {
123			fprintf(stderr, "Command failed %s:%d\n", name, lineno);
124			ret = 1;
125			if (!force)
126				break;
127		}
128	}
129	if (line)
130		free(line);
131
132	rtnl_close(&rth);
133	return ret;
134}
135
136
137int main(int argc, char **argv)
138{
139	char *basename;
140
141	basename = strrchr(argv[0], '/');
142	if (basename == NULL)
143		basename = argv[0];
144	else
145		basename++;
146
147	while (argc > 1) {
148		char *opt = argv[1];
149		if (strcmp(opt,"--") == 0) {
150			argc--; argv++;
151			break;
152		}
153		if (opt[0] != '-')
154			break;
155		if (opt[1] == '-')
156			opt++;
157		if (matches(opt, "-family") == 0) {
158			argc--;
159			argv++;
160			if (argc <= 1)
161				usage();
162			if (strcmp(argv[1], "inet") == 0)
163				preferred_family = AF_INET;
164			else if (strcmp(argv[1], "inet6") == 0)
165				preferred_family = AF_INET6;
166			else if (strcmp(argv[1], "dnet") == 0)
167				preferred_family = AF_DECnet;
168			else if (strcmp(argv[1], "link") == 0)
169				preferred_family = AF_PACKET;
170			else if (strcmp(argv[1], "ipx") == 0)
171				preferred_family = AF_IPX;
172			else if (strcmp(argv[1], "help") == 0)
173				usage();
174			else
175				invarg(argv[1], "invalid protocol family");
176		} else if (strcmp(opt, "-4") == 0) {
177			preferred_family = AF_INET;
178		} else if (strcmp(opt, "-6") == 0) {
179			preferred_family = AF_INET6;
180		} else if (strcmp(opt, "-0") == 0) {
181			preferred_family = AF_PACKET;
182		} else if (strcmp(opt, "-I") == 0) {
183			preferred_family = AF_IPX;
184		} else if (strcmp(opt, "-D") == 0) {
185			preferred_family = AF_DECnet;
186		} else if (matches(opt, "-stats") == 0 ||
187			   matches(opt, "-statistics") == 0) {
188			++show_stats;
189		} else if (matches(opt, "-details") == 0) {
190			++show_details;
191		} else if (matches(opt, "-resolve") == 0) {
192			++resolve_hosts;
193		} else if (matches(opt, "-oneline") == 0) {
194			++oneline;
195		} else if (matches(opt, "-timestamp") == 0) {
196			++timestamp;
197#if 0
198		} else if (matches(opt, "-numeric") == 0) {
199			rtnl_names_numeric++;
200#endif
201		} else if (matches(opt, "-Version") == 0) {
202			printf("ip utility, iproute2-ss%s\n", SNAPSHOT);
203			exit(0);
204		} else if (matches(opt, "-force") == 0) {
205			++force;
206		} else if (matches(opt, "-batch") == 0) {
207			argc--;
208			argv++;
209			if (argc <= 1)
210				usage();
211			batch_file = argv[1];
212		} else if (matches(opt, "-rcvbuf") == 0) {
213			unsigned int size;
214
215			argc--;
216			argv++;
217			if (argc <= 1)
218				usage();
219			if (get_unsigned(&size, argv[1], 0)) {
220				fprintf(stderr, "Invalid rcvbuf size '%s'\n",
221					argv[1]);
222				exit(-1);
223			}
224			rcvbuf = size;
225		} else if (matches(opt, "-help") == 0) {
226			usage();
227		} else {
228			fprintf(stderr, "Option \"%s\" is unknown, try \"ip -help\".\n", opt);
229			exit(-1);
230		}
231		argc--;	argv++;
232	}
233
234	_SL_ = oneline ? "\\" : "\n" ;
235
236	if (batch_file)
237		return batch(batch_file);
238
239	if (rtnl_open(&rth, 0) < 0)
240		exit(1);
241
242	if (strlen(basename) > 2)
243		return do_cmd(basename+2, argc, argv);
244
245	if (argc > 1)
246		return do_cmd(argv[1], argc-1, argv+1);
247
248	rtnl_close(&rth);
249	usage();
250}
251