[mirror_iproute2.git] / ip / ipmaddr.c

/*
 * ipmaddr.c		"ip maddress".
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <linux/netdevice.h>
#include <linux/if.h>
#include <linux/if_arp.h>
#include <linux/sockios.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>

#include "rt_names.h"
#include "utils.h"

static struct {
	char *dev;
	int  family;
} filter;

static void usage(void) __attribute__((noreturn));

static void usage(void)
{
	fprintf(stderr, "Usage: ip maddr [ add | del ] MULTIADDR dev STRING\n");
	fprintf(stderr, "       ip maddr show [ dev STRING ]\n");
	exit(-1);
}

static int parse_hex(char *str, unsigned char *addr)
{
	int len=0;

	while (*str) {
		int tmp;
		if (str[1] == 0)
			return -1;
		if (sscanf(str, "%02x", &tmp) != 1)
			return -1;
		addr[len] = tmp;
		len++;
		str += 2;
	}
	return len;
}

struct ma_info
{
	struct ma_info *next;
	int		index;
	int		users;
	char		*features;
	char		name[IFNAMSIZ];
	inet_prefix	addr;
};

void maddr_ins(struct ma_info **lst, struct ma_info *m)
{
	struct ma_info *mp;

	for (; (mp=*lst) != NULL; lst = &mp->next) {
		if (mp->index > m->index)
			break;
	}
	m->next = *lst;
	*lst = m;
}

void read_dev_mcast(struct ma_info **result_p)
{
	char buf[256];
	FILE *fp = fopen("/proc/net/dev_mcast", "r");

	if (!fp)
		return;

	while (fgets(buf, sizeof(buf), fp)) {
		char hexa[256];
		struct ma_info m;
		int len;
		int st;

		memset(&m, 0, sizeof(m));
		sscanf(buf, "%d%s%d%d%s", &m.index, m.name, &m.users, &st,
		       hexa);
		if (filter.dev && strcmp(filter.dev, m.name))
			continue;

		m.addr.family = AF_PACKET;

		len = parse_hex(hexa, (unsigned char*)&m.addr.data);
		if (len >= 0) {
			struct ma_info *ma = malloc(sizeof(m));

			memcpy(ma, &m, sizeof(m));
			ma->addr.bytelen = len;
			ma->addr.bitlen = len<<3;
			if (st)
				ma->features = "static";
			maddr_ins(result_p, ma);
		}
	}
	fclose(fp);
}

void read_igmp(struct ma_info **result_p)
{
	struct ma_info m;
	char buf[256];
	FILE *fp = fopen("/proc/net/igmp", "r");

	if (!fp)
		return;
	memset(&m, 0, sizeof(m));
	fgets(buf, sizeof(buf), fp);

	m.addr.family = AF_INET;
	m.addr.bitlen = 32;
	m.addr.bytelen = 4;

	while (fgets(buf, sizeof(buf), fp)) {
		struct ma_info *ma = malloc(sizeof(m));

		if (buf[0] != '\t') {
			sscanf(buf, "%d%s", &m.index, m.name);
			continue;
		}

		if (filter.dev && strcmp(filter.dev, m.name))
			continue;

		sscanf(buf, "%08x%d", (__u32*)&m.addr.data, &m.users);

		ma = malloc(sizeof(m));
		memcpy(ma, &m, sizeof(m));
		maddr_ins(result_p, ma);
	}
	fclose(fp);
}


void read_igmp6(struct ma_info **result_p)
{
	char buf[256];
	FILE *fp = fopen("/proc/net/igmp6", "r");

	if (!fp)
		return;

	while (fgets(buf, sizeof(buf), fp)) {
		char hexa[256];
		struct ma_info m;
		int len;

		memset(&m, 0, sizeof(m));
		sscanf(buf, "%d%s%s%d", &m.index, m.name, hexa, &m.users);

		if (filter.dev && strcmp(filter.dev, m.name))
			continue;

		m.addr.family = AF_INET6;

		len = parse_hex(hexa, (unsigned char*)&m.addr.data);
		if (len >= 0) {
			struct ma_info *ma = malloc(sizeof(m));

			memcpy(ma, &m, sizeof(m));

			ma->addr.bytelen = len;
			ma->addr.bitlen = len<<3;
			maddr_ins(result_p, ma);
		}
	}
	fclose(fp);
}

static void print_maddr(FILE *fp, struct ma_info *list)
{
	fprintf(fp, "\t");

	if (list->addr.family == AF_PACKET) {
		SPRINT_BUF(b1);
		fprintf(fp, "link  %s", ll_addr_n2a((unsigned char*)list->addr.data,
						    list->addr.bytelen, 0,
						    b1, sizeof(b1)));
	} else {
		char abuf[256];
		switch(list->addr.family) {
		case AF_INET:
			fprintf(fp, "inet  ");
			break;
		case AF_INET6:
			fprintf(fp, "inet6 ");
			break;
		default:
			fprintf(fp, "family %d ", list->addr.family);
			break;
		}
		fprintf(fp, "%s", 
			format_host(list->addr.family,
				    -1,
				    list->addr.data,
				    abuf, sizeof(abuf)));
	}
	if (list->users != 1)
		fprintf(fp, " users %d", list->users);
	if (list->features)
		fprintf(fp, " %s", list->features);
	fprintf(fp, "\n");
}

static void print_mlist(FILE *fp, struct ma_info *list)
{
	int cur_index = 0;

	for (; list; list = list->next) {
		if (oneline) {
			cur_index = list->index;
			fprintf(fp, "%d:\t%s%s", cur_index, list->name, _SL_);
		} else if (cur_index != list->index) {
			cur_index = list->index;
			fprintf(fp, "%d:\t%s\n", cur_index, list->name);
		}
		print_maddr(fp, list);
	}
}

static int multiaddr_list(int argc, char **argv)
{
	struct ma_info *list = NULL;

	if (!filter.family)
		filter.family = preferred_family;

	while (argc > 0) {
		if (1) {
			if (strcmp(*argv, "dev") == 0) {
				NEXT_ARG();
			}
			if (matches(*argv, "help") == 0)
				usage();
			if (filter.dev)
				duparg2("dev", *argv);
			filter.dev = *argv;
		}
		argv++; argc--;
	}

	if (!filter.family || filter.family == AF_PACKET)
		read_dev_mcast(&list);
	if (!filter.family || filter.family == AF_INET)
		read_igmp(&list);
	if (!filter.family || filter.family == AF_INET6)
		read_igmp6(&list);
	print_mlist(stdout, list);
	return 0;
}

int multiaddr_modify(int cmd, int argc, char **argv)
{
	struct ifreq ifr;
	int fd;

	memset(&ifr, 0, sizeof(ifr));

	if (cmd == RTM_NEWADDR)
		cmd = SIOCADDMULTI;
	else
		cmd = SIOCDELMULTI;

	while (argc > 0) {
		if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			if (ifr.ifr_name[0])
				duparg("dev", *argv);
			strncpy(ifr.ifr_name, *argv, IFNAMSIZ);
		} else {
			if (matches(*argv, "address") == 0) {
				NEXT_ARG();
			}
			if (matches(*argv, "help") == 0)
				usage();
			if (ifr.ifr_hwaddr.sa_data[0])
				duparg("address", *argv);
			if (ll_addr_a2n(ifr.ifr_hwaddr.sa_data, 14, *argv) < 0) {
				fprintf(stderr, "Error: \"%s\" is not a legal ll address.\n", *argv);
				exit(1);
			}
		}
		argc--; argv++;
	}
	if (ifr.ifr_name[0] == 0) {
		fprintf(stderr, "Not enough information: \"dev\" is required.\n");
		exit(-1);
	}

	fd = socket(AF_INET, SOCK_DGRAM, 0);
	if (fd < 0) {
		perror("Cannot create socket");
		exit(1);
	}
	if (ioctl(fd, cmd, (char*)&ifr) != 0) {
		perror("ioctl");
		exit(1);
	}
	close(fd);

	exit(0);
}


int do_multiaddr(int argc, char **argv)
{
	if (argc < 1)
		return multiaddr_list(0, NULL);
	if (matches(*argv, "add") == 0)
		return multiaddr_modify(RTM_NEWADDR, argc-1, argv+1);
	if (matches(*argv, "delete") == 0)
		return multiaddr_modify(RTM_DELADDR, argc-1, argv+1);
	if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
	    || matches(*argv, "lst") == 0)
		return multiaddr_list(argc-1, argv+1);
	if (matches(*argv, "help") == 0)
		usage();
	fprintf(stderr, "Command \"%s\" is unknown, try \"ip maddr help\".\n", *argv);
	exit(-1);
}
Commit	Line	Data
aba5acdf SH	1	/*
	2	* ipmaddr.c "ip maddress".
	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
	13	#include <stdio.h>
	14	#include <stdlib.h>
	15	#include <unistd.h>
	16	#include <syslog.h>
	17	#include <fcntl.h>
	18	#include <sys/ioctl.h>
	19	#include <sys/socket.h>
	20	#include <linux/netdevice.h>
	21	#include <linux/if.h>
	22	#include <linux/if_arp.h>
	23	#include <linux/sockios.h>
	24	#include <netinet/in.h>
	25	#include <arpa/inet.h>
	26	#include <string.h>
	27
	28	#include "rt_names.h"
	29	#include "utils.h"
	30
	31	static struct {
	32	char *dev;
	33	int family;
	34	} filter;
	35
	36	static void usage(void) __attribute__((noreturn));
	37
	38	static void usage(void)
	39	{
	40	fprintf(stderr, "Usage: ip maddr [ add \| del ] MULTIADDR dev STRING\n");
	41	fprintf(stderr, " ip maddr show [ dev STRING ]\n");
	42	exit(-1);
	43	}
	44
	45	static int parse_hex(char str, unsigned char addr)
	46	{
	47	int len=0;
	48
	49	while (*str) {
	50	int tmp;
	51	if (str[1] == 0)
	52	return -1;
	53	if (sscanf(str, "%02x", &tmp) != 1)
	54	return -1;
	55	addr[len] = tmp;
	56	len++;
	57	str += 2;
	58	}
	59	return len;
	60	}
	61
	62	struct ma_info
	63	{
	64	struct ma_info *next;
65	int index;
66	int users;
67	char *features;
68	char name[IFNAMSIZ];
69	inet_prefix addr;
70	};
71
72	void maddr_ins(struct ma_info *lst, struct ma_info m)
73	{
74	struct ma_info *mp;
75
76	for (; (mp=*lst) != NULL; lst = &mp->next) {
77	if (mp->index > m->index)
78	break;
79	}
80	m->next = *lst;
81	*lst = m;
82	}
83
84	void read_dev_mcast(struct ma_info **result_p)
85	{
86	char buf[256];
87	FILE *fp = fopen("/proc/net/dev_mcast", "r");
88
89	if (!fp)
90	return;
91
92	while (fgets(buf, sizeof(buf), fp)) {
93	char hexa[256];
94	struct ma_info m;
95	int len;
96	int st;
97
98	memset(&m, 0, sizeof(m));
99	sscanf(buf, "%d%s%d%d%s", &m.index, m.name, &m.users, &st,
100	hexa);
101	if (filter.dev && strcmp(filter.dev, m.name))
102	continue;
103
104	m.addr.family = AF_PACKET;
105
106	len = parse_hex(hexa, (unsigned char*)&m.addr.data);
107	if (len >= 0) {
108	struct ma_info *ma = malloc(sizeof(m));
109
110	memcpy(ma, &m, sizeof(m));
111	ma->addr.bytelen = len;
112	ma->addr.bitlen = len<<3;
113	if (st)
114	ma->features = "static";
115	maddr_ins(result_p, ma);
116	}
117	}
118	fclose(fp);
119	}
120
121	void read_igmp(struct ma_info **result_p)
122	{
123	struct ma_info m;
124	char buf[256];
125	FILE *fp = fopen("/proc/net/igmp", "r");
126
127	if (!fp)
128	return;
129	memset(&m, 0, sizeof(m));
130	fgets(buf, sizeof(buf), fp);
131
132	m.addr.family = AF_INET;
133	m.addr.bitlen = 32;
134	m.addr.bytelen = 4;
135
136	while (fgets(buf, sizeof(buf), fp)) {
137	struct ma_info *ma = malloc(sizeof(m));
138
139	if (buf[0] != '\t') {
140	sscanf(buf, "%d%s", &m.index, m.name);
141	continue;
142	}
143
144	if (filter.dev && strcmp(filter.dev, m.name))
145	continue;
146
147	sscanf(buf, "%08x%d", (__u32*)&m.addr.data, &m.users);
148
149	ma = malloc(sizeof(m));
150	memcpy(ma, &m, sizeof(m));
151	maddr_ins(result_p, ma);
152	}
153	fclose(fp);
154	}
155
156
157	void read_igmp6(struct ma_info **result_p)
158	{
159	char buf[256];
160	FILE *fp = fopen("/proc/net/igmp6", "r");
161
162	if (!fp)
163	return;
164
165	while (fgets(buf, sizeof(buf), fp)) {
166	char hexa[256];
167	struct ma_info m;
168	int len;
169
170	memset(&m, 0, sizeof(m));
171	sscanf(buf, "%d%s%s%d", &m.index, m.name, hexa, &m.users);
172
173	if (filter.dev && strcmp(filter.dev, m.name))
174	continue;
175
176	m.addr.family = AF_INET6;
177
178	len = parse_hex(hexa, (unsigned char*)&m.addr.data);
179	if (len >= 0) {
180	struct ma_info *ma = malloc(sizeof(m));
181
182	memcpy(ma, &m, sizeof(m));
183
184	ma->addr.bytelen = len;
185	ma->addr.bitlen = len<<3;
186	maddr_ins(result_p, ma);
187	}
188	}
189	fclose(fp);
190	}
191
192	static void print_maddr(FILE fp, struct ma_info list)
193	{
194	fprintf(fp, "\t");
195
196	if (list->addr.family == AF_PACKET) {
197	SPRINT_BUF(b1);
198	fprintf(fp, "link %s", ll_addr_n2a((unsigned char*)list->addr.data,
199	list->addr.bytelen, 0,
200	b1, sizeof(b1)));
201	} else {
202	char abuf[256];
203	switch(list->addr.family) {
204	case AF_INET:
205	fprintf(fp, "inet ");
206	break;
207	case AF_INET6:
208	fprintf(fp, "inet6 ");
209	break;
210	default:
211	fprintf(fp, "family %d ", list->addr.family);
212	break;
213	}
214	fprintf(fp, "%s",
215	format_host(list->addr.family,
216	-1,
217	list->addr.data,
218	abuf, sizeof(abuf)));
219	}
220	if (list->users != 1)
221	fprintf(fp, " users %d", list->users);
222	if (list->features)
223	fprintf(fp, " %s", list->features);
224	fprintf(fp, "\n");
225	}
226
227	static void print_mlist(FILE fp, struct ma_info list)
228	{
229	int cur_index = 0;
230
231	for (; list; list = list->next) {
232	if (oneline) {
233	cur_index = list->index;
234	fprintf(fp, "%d:\t%s%s", cur_index, list->name, _SL_);
235	} else if (cur_index != list->index) {
236	cur_index = list->index;
237	fprintf(fp, "%d:\t%s\n", cur_index, list->name);
238	}
239	print_maddr(fp, list);
240	}
241	}
242
243	static int multiaddr_list(int argc, char **argv)
244	{
245	struct ma_info *list = NULL;
246
247	if (!filter.family)
248	filter.family = preferred_family;
249
250	while (argc > 0) {
251	if (1) {
252	if (strcmp(*argv, "dev") == 0) {
253	NEXT_ARG();
254	}
255	if (matches(*argv, "help") == 0)
256	usage();
257	if (filter.dev)
258	duparg2("dev", *argv);
259	filter.dev = *argv;
260	}
261	argv++; argc--;
262	}
263
264	if (!filter.family \|\| filter.family == AF_PACKET)
265	read_dev_mcast(&list);
266	if (!filter.family \|\| filter.family == AF_INET)
267	read_igmp(&list);
268	if (!filter.family \|\| filter.family == AF_INET6)
269	read_igmp6(&list);
270	print_mlist(stdout, list);
271	return 0;
272	}
273
274	int multiaddr_modify(int cmd, int argc, char **argv)
275	{
276	struct ifreq ifr;
277	int fd;
278
279	memset(&ifr, 0, sizeof(ifr));
280
281	if (cmd == RTM_NEWADDR)
282	cmd = SIOCADDMULTI;
283	else
284	cmd = SIOCDELMULTI;
285
286	while (argc > 0) {
287	if (strcmp(*argv, "dev") == 0) {
288	NEXT_ARG();
289	if (ifr.ifr_name[0])
290	duparg("dev", *argv);
291	strncpy(ifr.ifr_name, *argv, IFNAMSIZ);
292	} else {
293	if (matches(*argv, "address") == 0) {
294	NEXT_ARG();
295	}
296	if (matches(*argv, "help") == 0)
297	usage();
298	if (ifr.ifr_hwaddr.sa_data[0])
299	duparg("address", *argv);
300	if (ll_addr_a2n(ifr.ifr_hwaddr.sa_data, 14, *argv) < 0) {
301	fprintf(stderr, "Error: \"%s\" is not a legal ll address.\n", *argv);
302	exit(1);
303	}
304	}
305	argc--; argv++;
306	}
307	if (ifr.ifr_name[0] == 0) {
308	fprintf(stderr, "Not enough information: \"dev\" is required.\n");
309	exit(-1);
310	}
311
312	fd = socket(AF_INET, SOCK_DGRAM, 0);
313	if (fd < 0) {
314	perror("Cannot create socket");
315	exit(1);
316	}
317	if (ioctl(fd, cmd, (char*)&ifr) != 0) {
318	perror("ioctl");
319	exit(1);
320	}
321	close(fd);
322
323	exit(0);
324	}
325
326
327	int do_multiaddr(int argc, char **argv)
328	{
329	if (argc < 1)
330	return multiaddr_list(0, NULL);
331	if (matches(*argv, "add") == 0)
332	return multiaddr_modify(RTM_NEWADDR, argc-1, argv+1);
333	if (matches(*argv, "delete") == 0)
334	return multiaddr_modify(RTM_DELADDR, argc-1, argv+1);
335	if (matches(argv, "list") == 0 \|\| matches(argv, "show") == 0
336	\|\| matches(*argv, "lst") == 0)
337	return multiaddr_list(argc-1, argv+1);
338	if (matches(*argv, "help") == 0)
339	usage();
340	fprintf(stderr, "Command \"%s\" is unknown, try \"ip maddr help\".\n", *argv);
341	exit(-1);
342	}