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 | ntable | 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	{ "ntable",	do_ipntable },
72	{ "ntbl",	do_ipntable },
73	{ "link",	do_iplink },
74	{ "tunnel",	do_iptunnel },
75	{ "tunl",	do_iptunnel },
76	{ "monitor",	do_ipmonitor },
77	{ "xfrm",	do_xfrm },
78	{ "mroute",	do_multiroute },
79	{ "help",	do_help },
80	{ 0 }
81};
82
83static int do_cmd(const char *argv0, int argc, char **argv)
84{
85	const struct cmd *c;
86
87	for (c = cmds; c->cmd; ++c) {
88		if (matches(argv0, c->cmd) == 0)
89			return c->func(argc-1, argv+1);
90	}
91
92	fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0);
93	return -1;
94}
95
96static int batch(const char *name)
97{
98	char *line = NULL;
99	size_t len = 0;
100	int ret = 0;
101	int lineno = 0;
102
103	if (name && strcmp(name, "-") != 0) {
104		if (freopen(name, "r", stdin) == NULL) {
105			fprintf(stderr, "Cannot open file \"%s\" for reading: %s=n",
106				name, strerror(errno));
107			return -1;
108		}
109	}
110
111	if (rtnl_open(&rth, 0) < 0) {
112		fprintf(stderr, "Cannot open rtnetlink\n");
113		return -1;
114	}
115
116	while (getcmdline(&line, &len, stdin) != -1) {
117		char *largv[100];
118		int largc;
119
120		largc = makeargs(line, largv, 100);
121		if (largc == 0)
122			continue;	/* blank line */
123
124		if (do_cmd(largv[0], largc, largv)) {
125			fprintf(stderr, "Command failed %s:%d\n", name, lineno);
126			ret = 1;
127			if (!force)
128				break;
129		}
130	}
131	if (line)
132		free(line);
133
134	rtnl_close(&rth);
135	return ret;
136}
137
138
139int main(int argc, char **argv)
140{
141	char *basename;
142
143	basename = strrchr(argv[0], '/');
144	if (basename == NULL)
145		basename = argv[0];
146	else
147		basename++;
148
149	while (argc > 1) {
150		char *opt = argv[1];
151		if (strcmp(opt,"--") == 0) {
152			argc--; argv++;
153			break;
154		}
155		if (opt[0] != '-')
156			break;
157		if (opt[1] == '-')
158			opt++;
159		if (matches(opt, "-family") == 0) {
160			argc--;
161			argv++;
162			if (argc <= 1)
163				usage();
164			if (strcmp(argv[1], "inet") == 0)
165				preferred_family = AF_INET;
166			else if (strcmp(argv[1], "inet6") == 0)
167				preferred_family = AF_INET6;
168			else if (strcmp(argv[1], "dnet") == 0)
169				preferred_family = AF_DECnet;
170			else if (strcmp(argv[1], "link") == 0)
171				preferred_family = AF_PACKET;
172			else if (strcmp(argv[1], "ipx") == 0)
173				preferred_family = AF_IPX;
174			else if (strcmp(argv[1], "help") == 0)
175				usage();
176			else
177				invarg(argv[1], "invalid protocol family");
178		} else if (strcmp(opt, "-4") == 0) {
179			preferred_family = AF_INET;
180		} else if (strcmp(opt, "-6") == 0) {
181			preferred_family = AF_INET6;
182		} else if (strcmp(opt, "-0") == 0) {
183			preferred_family = AF_PACKET;
184		} else if (strcmp(opt, "-I") == 0) {
185			preferred_family = AF_IPX;
186		} else if (strcmp(opt, "-D") == 0) {
187			preferred_family = AF_DECnet;
188		} else if (matches(opt, "-stats") == 0 ||
189			   matches(opt, "-statistics") == 0) {
190			++show_stats;
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, "-help") == 0) {
213			usage();
214		} else {
215			fprintf(stderr, "Option \"%s\" is unknown, try \"ip -help\".\n", opt);
216			exit(-1);
217		}
218		argc--;	argv++;
219	}
220
221	_SL_ = oneline ? "\\" : "\n" ;
222
223	if (batch_file)
224		return batch(batch_file);
225
226	if (rtnl_open(&rth, 0) < 0)
227		exit(1);
228
229	if (strlen(basename) > 2)
230		return do_cmd(basename+2, argc, argv);
231
232	if (argc > 1)
233		return do_cmd(argv[1], argc-1, argv+1);
234
235	rtnl_close(&rth);
236	usage();
237}
238