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 | tuntap | maddr | mroute | mrule | 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	{ "tuntap",	do_iptuntap },
75	{ "tap",	do_iptuntap },
76	{ "monitor",	do_ipmonitor },
77	{ "xfrm",	do_xfrm },
78	{ "mroute",	do_multiroute },
79	{ "mrule",	do_multirule },
80	{ "help",	do_help },
81	{ 0,		0 }
82};
83
84static int do_cmd(const char *argv0, int argc, char **argv)
85{
86	const struct cmd *c;
87
88	for (c = cmds; c->cmd; ++c) {
89		if (matches(argv0, c->cmd) == 0)
90			return c->func(argc-1, argv+1);
91	}
92
93	fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0);
94	return -1;
95}
96
97#ifndef ANDROID
98static int batch(const char *name)
99{
100	char *line = NULL;
101	size_t len = 0;
102	int ret = 0;
103
104	if (name && strcmp(name, "-") != 0) {
105		if (freopen(name, "r", stdin) == NULL) {
106			fprintf(stderr, "Cannot open file \"%s\" for reading: %s\n",
107				name, strerror(errno));
108			return -1;
109		}
110	}
111
112	if (rtnl_open(&rth, 0) < 0) {
113		fprintf(stderr, "Cannot open rtnetlink\n");
114		return -1;
115	}
116
117	cmdlineno = 0;
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, cmdlineno);
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#endif
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#ifndef ANDROID
211		} else if (matches(opt, "-batch") == 0) {
212			argc--;
213			argv++;
214			if (argc <= 1)
215				usage();
216			batch_file = argv[1];
217#endif
218		} else if (matches(opt, "-rcvbuf") == 0) {
219			unsigned int size;
220
221			argc--;
222			argv++;
223			if (argc <= 1)
224				usage();
225			if (get_unsigned(&size, argv[1], 0)) {
226				fprintf(stderr, "Invalid rcvbuf size '%s'\n",
227					argv[1]);
228				exit(-1);
229			}
230			rcvbuf = size;
231		} else if (matches(opt, "-help") == 0) {
232			usage();
233		} else {
234			fprintf(stderr, "Option \"%s\" is unknown, try \"ip -help\".\n", opt);
235			exit(-1);
236		}
237		argc--;	argv++;
238	}
239
240	_SL_ = oneline ? "\\" : "\n" ;
241
242#ifndef ANDROID
243	if (batch_file)
244		return batch(batch_file);
245#endif
246
247	if (rtnl_open(&rth, 0) < 0)
248		exit(1);
249
250	if (strlen(basename) > 2)
251		return do_cmd(basename+2, argc, argv);
252
253	if (argc > 1)
254		return do_cmd(argv[1], argc-1, argv+1);
255
256	rtnl_close(&rth);
257	usage();
258}
259