Diff of /trunk/mkinitrd-magellan/busybox/networking/libiproute/iplink.c

Parent Directory | Revision Log | Patch

	revision 532 by niro, Sat Sep 1 22:45:15 2007 UTC	revision 984 by niro, Sun May 30 11:32:42 2010 UTC
#	Line 7	Line 7
7	* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.	* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8	*/	*/
9
10	#include "libbb.h"	//#include <sys/ioctl.h>
11		//#include <sys/socket.h>
	#include <sys/ioctl.h>
	#include <sys/socket.h>
12	#include <net/if.h>	#include <net/if.h>
13	#include <net/if_packet.h>	#include <net/if_packet.h>
14	#include <netpacket/packet.h>	#include <netpacket/packet.h>
15	#include <net/ethernet.h>	#include <net/ethernet.h>
16
17		#include "ip_common.h"  /* #include "libbb.h" is inside */
18	#include "rt_names.h"	#include "rt_names.h"
19	#include "utils.h"	#include "utils.h"
	#include "ip_common.h"
20
21	/* take from linux/sockios.h */	/* taken from linux/sockios.h */
22	#define SIOCSIFNAME 0x8923 /* set interface name */	#define SIOCSIFNAME 0x8923 /* set interface name */
23
24	static int on_off(char *msg)	/* Exits on error */
	{
	bb_error_msg("error: argument of \"%s\" must be \"on\" or \"off\"", msg);
	return -1;
	}
25	static int get_ctl_fd(void)	static int get_ctl_fd(void)
26	{	{
	int s_errno;
27	int fd;	int fd;
28
29	fd = socket(PF_INET, SOCK_DGRAM, 0);	fd = socket(PF_INET, SOCK_DGRAM, 0);
30	if (fd >= 0)	if (fd >= 0)
31	return fd;	return fd;
	s_errno = errno;
32	fd = socket(PF_PACKET, SOCK_DGRAM, 0);	fd = socket(PF_PACKET, SOCK_DGRAM, 0);
33	if (fd >= 0)	if (fd >= 0)
34	return fd;	return fd;
35	fd = socket(PF_INET6, SOCK_DGRAM, 0);	return xsocket(PF_INET6, SOCK_DGRAM, 0);
	if (fd >= 0)
	return fd;
	errno = s_errno;
	bb_perror_msg("cannot create control socket");
	return -1;
36	}	}
37
38	static int do_chflags(char *dev, uint32_t flags, uint32_t mask)	/* Exits on error */
39		static void do_chflags(char *dev, uint32_t flags, uint32_t mask)
40	{	{
41	struct ifreq ifr;	struct ifreq ifr;
42	int fd;	int fd;
	int err;
43
44	strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));	strncpy_IFNAMSIZ(ifr.ifr_name, dev);
45	fd = get_ctl_fd();	fd = get_ctl_fd();
46	if (fd < 0)	xioctl(fd, SIOCGIFFLAGS, &ifr);
47	return -1;	if ((ifr.ifr_flags ^ flags) & mask) {
	err = ioctl(fd, SIOCGIFFLAGS, &ifr);
	if (err) {
	bb_perror_msg("SIOCGIFFLAGS");
	close(fd);
	return -1;
	}
	if ((ifr.ifr_flags^flags)&mask) {
48	ifr.ifr_flags &= ~mask;	ifr.ifr_flags &= ~mask;
49	ifr.ifr_flags |= mask&flags;	ifr.ifr_flags |= mask & flags;
50	err = ioctl(fd, SIOCSIFFLAGS, &ifr);	xioctl(fd, SIOCSIFFLAGS, &ifr);
	if (err)
	bb_perror_msg("SIOCSIFFLAGS");
51	}	}
52	close(fd);	close(fd);
	return err;
53	}	}
54
55	static int do_changename(char *dev, char *newdev)	/* Exits on error */
56		static void do_changename(char *dev, char *newdev)
57	{	{
58	struct ifreq ifr;	struct ifreq ifr;
59	int fd;	int fd;
	int err;
60
61	strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));	strncpy_IFNAMSIZ(ifr.ifr_name, dev);
62	strncpy(ifr.ifr_newname, newdev, sizeof(ifr.ifr_newname));	strncpy_IFNAMSIZ(ifr.ifr_newname, newdev);
63	fd = get_ctl_fd();	fd = get_ctl_fd();
64	if (fd < 0)	xioctl(fd, SIOCSIFNAME, &ifr);
	return -1;
	err = ioctl(fd, SIOCSIFNAME, &ifr);
	if (err) {
	bb_perror_msg("SIOCSIFNAME");
	close(fd);
	return -1;
	}
65	close(fd);	close(fd);
	return err;
66	}	}
67
68	static int set_qlen(char *dev, int qlen)	/* Exits on error */
69		static void set_qlen(char *dev, int qlen)
70	{	{
71	struct ifreq ifr;	struct ifreq ifr;
72	int s;	int s;
73
74	s = get_ctl_fd();	s = get_ctl_fd();
	if (s < 0)
	return -1;
75	memset(&ifr, 0, sizeof(ifr));	memset(&ifr, 0, sizeof(ifr));
76	strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));	strncpy_IFNAMSIZ(ifr.ifr_name, dev);
77	ifr.ifr_qlen = qlen;	ifr.ifr_qlen = qlen;
78	if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {	xioctl(s, SIOCSIFTXQLEN, &ifr);
	bb_perror_msg("SIOCSIFXQLEN");
	close(s);
	return -1;
	}
79	close(s);	close(s);
	return 0;
80	}	}
81
82	static int set_mtu(char *dev, int mtu)	/* Exits on error */
83		static void set_mtu(char *dev, int mtu)
84	{	{
85	struct ifreq ifr;	struct ifreq ifr;
86	int s;	int s;
87
88	s = get_ctl_fd();	s = get_ctl_fd();
	if (s < 0)
	return -1;
89	memset(&ifr, 0, sizeof(ifr));	memset(&ifr, 0, sizeof(ifr));
90	strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));	strncpy_IFNAMSIZ(ifr.ifr_name, dev);
91	ifr.ifr_mtu = mtu;	ifr.ifr_mtu = mtu;
92	if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {	xioctl(s, SIOCSIFMTU, &ifr);
	bb_perror_msg("SIOCSIFMTU");
	close(s);
	return -1;
	}
93	close(s);	close(s);
	return 0;
94	}	}
95
96		/* Exits on error */
97	static int get_address(char *dev, int *htype)	static int get_address(char *dev, int *htype)
98	{	{
99	struct ifreq ifr;	struct ifreq ifr;
#	Line 150  static int get_address(char *dev, int *h	Line 101  static int get_address(char *dev, int *h
101	socklen_t alen;	socklen_t alen;
102	int s;	int s;
103
104	s = socket(PF_PACKET, SOCK_DGRAM, 0);	s = xsocket(PF_PACKET, SOCK_DGRAM, 0);
	if (s < 0) {
	bb_perror_msg("socket(PF_PACKET)");
	return -1;
	}
105
106	memset(&ifr, 0, sizeof(ifr));	memset(&ifr, 0, sizeof(ifr));
107	strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));	strncpy_IFNAMSIZ(ifr.ifr_name, dev);
108	if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {	xioctl(s, SIOCGIFINDEX, &ifr);
	bb_perror_msg("SIOCGIFINDEX");
	close(s);
	return -1;
	}
109
110	memset(&me, 0, sizeof(me));	memset(&me, 0, sizeof(me));
111	me.sll_family = AF_PACKET;	me.sll_family = AF_PACKET;
112	me.sll_ifindex = ifr.ifr_ifindex;	me.sll_ifindex = ifr.ifr_ifindex;
113	me.sll_protocol = htons(ETH_P_LOOP);	me.sll_protocol = htons(ETH_P_LOOP);
114	if (bind(s, (struct sockaddr*)&me, sizeof(me)) == -1) {	xbind(s, (struct sockaddr*)&me, sizeof(me));
	bb_perror_msg("bind");
	close(s);
	return -1;
	}
115	alen = sizeof(me);	alen = sizeof(me);
116	if (getsockname(s, (struct sockaddr*)&me, &alen) == -1) {	getsockname(s, (struct sockaddr*)&me, &alen);
117	bb_perror_msg("getsockname");	//never happens:
118	close(s);	//if (getsockname(s, (struct sockaddr*)&me, &alen) == -1)
119	return -1;	// bb_perror_msg_and_die("getsockname");
	}
120	close(s);	close(s);
121	*htype = me.sll_hatype;	*htype = me.sll_hatype;
122	return me.sll_halen;	return me.sll_halen;
123	}	}
124
125	static int parse_address(char *dev, int hatype, int halen, char *lla, struct ifreq *ifr)	/* Exits on error */
126		static void parse_address(char *dev, int hatype, int halen, char *lla, struct ifreq *ifr)
127	{	{
128	int alen;	int alen;
129
130	memset(ifr, 0, sizeof(*ifr));	memset(ifr, 0, sizeof(*ifr));
131	strncpy(ifr->ifr_name, dev, sizeof(ifr->ifr_name));	strncpy_IFNAMSIZ(ifr->ifr_name, dev);
132	ifr->ifr_hwaddr.sa_family = hatype;	ifr->ifr_hwaddr.sa_family = hatype;
133	alen = ll_addr_a2n((unsigned char *)(ifr->ifr_hwaddr.sa_data), 14, lla);
134		alen = hatype == 1/*ARPHRD_ETHER*/ ? 14/*ETH_HLEN*/ : 19/*INFINIBAND_HLEN*/;
135		alen = ll_addr_a2n((unsigned char *)(ifr->ifr_hwaddr.sa_data), alen, lla);
136	if (alen < 0)	if (alen < 0)
137	return -1;	exit(EXIT_FAILURE);
138	if (alen != halen) {	if (alen != halen) {
139	bb_error_msg("wrong address (%s) length: expected %d bytes", lla, halen);	bb_error_msg_and_die("wrong address (%s) length: expected %d bytes", lla, halen);
	return -1;
140	}	}
	return 0;
141	}	}
142
143	static int set_address(struct ifreq *ifr, int brd)	/* Exits on error */
144		static void set_address(struct ifreq *ifr, int brd)
145	{	{
146	int s;	int s;
147
148	s = get_ctl_fd();	s = get_ctl_fd();
149	if (s < 0)	if (brd)
150	return -1;	xioctl(s, SIOCSIFHWBROADCAST, ifr);
151	if (ioctl(s, brd?SIOCSIFHWBROADCAST:SIOCSIFHWADDR, ifr) < 0) {	else
152	bb_perror_msg(brd ? "SIOCSIFHWBROADCAST" : "SIOCSIFHWADDR");	xioctl(s, SIOCSIFHWADDR, ifr);
	close(s);
	return -1;
	}
153	close(s);	close(s);
	return 0;
154	}	}
155
156
157	static int do_set(int argc, char **argv)	static void die_must_be_on_off(const char *msg) NORETURN;
158		static void die_must_be_on_off(const char *msg)
159		{
160		bb_error_msg_and_die("argument of \"%s\" must be \"on\" or \"off\"", msg);
161		}
162
163		/* Return value becomes exitcode. It's okay to not return at all */
164		static int do_set(char **argv)
165	{	{
166	char *dev = NULL;	char *dev = NULL;
167	uint32_t mask = 0;	uint32_t mask = 0;
#	Line 231  static int do_set(int argc, char **argv)	Line 173  static int do_set(int argc, char **argv)
173	struct ifreq ifr0, ifr1;	struct ifreq ifr0, ifr1;
174	char *newname = NULL;	char *newname = NULL;
175	int htype, halen;	int htype, halen;
176		static const char keywords[] ALIGN1 =
177	while (argc > 0) {	"up\0""down\0""name\0""mtu\0""multicast\0"
178	if (strcmp(*argv, "up") == 0) {	"arp\0""address\0""dev\0";
179		enum { ARG_up = 0, ARG_down, ARG_name, ARG_mtu, ARG_multicast,
180		ARG_arp, ARG_addr, ARG_dev };
181		static const char str_on_off[] ALIGN1 = "on\0""off\0";
182		enum { PARM_on = 0, PARM_off };
183		smalluint key;
184
185		while (*argv) {
186		/* substring search ensures that e.g. "addr" and "address"
187		* are both accepted */
188		key = index_in_substrings(keywords, *argv);
189		if (key == ARG_up) {
190	mask |= IFF_UP;	mask |= IFF_UP;
191	flags |= IFF_UP;	flags |= IFF_UP;
192	} else if (strcmp(*argv, "down") == 0) {	}
193		if (key == ARG_down) {
194	mask |= IFF_UP;	mask |= IFF_UP;
195	flags &= ~IFF_UP;	flags &= ~IFF_UP;
196	} else if (strcmp(*argv, "name") == 0) {	}
197		if (key == ARG_name) {
198	NEXT_ARG();	NEXT_ARG();
199	newname = *argv;	newname = *argv;
200	} else if (strcmp(*argv, "mtu") == 0) {	}
201		if (key == ARG_mtu) {
202	NEXT_ARG();	NEXT_ARG();
203	if (mtu != -1)	if (mtu != -1)
204	duparg("mtu", *argv);	duparg("mtu", *argv);
205	if (get_integer(&mtu, *argv, 0))	mtu = get_unsigned(*argv, "mtu");
206	invarg(*argv, "mtu");	}
207	} else if (strcmp(*argv, "multicast") == 0) {	if (key == ARG_multicast) {
208		int param;
209	NEXT_ARG();	NEXT_ARG();
210	mask |= IFF_MULTICAST;	mask |= IFF_MULTICAST;
211	if (strcmp(*argv, "on") == 0) {	param = index_in_strings(str_on_off, *argv);
212		if (param < 0)
213		die_must_be_on_off("multicast");
214		if (param == PARM_on)
215	flags |= IFF_MULTICAST;	flags |= IFF_MULTICAST;
216	} else if (strcmp(*argv, "off") == 0) {	else
217	flags &= ~IFF_MULTICAST;	flags &= ~IFF_MULTICAST;
218	} else	}
219	return on_off("multicast");	if (key == ARG_arp) {
220	} else if (strcmp(*argv, "arp") == 0) {	int param;
221	NEXT_ARG();	NEXT_ARG();
222	mask |= IFF_NOARP;	mask |= IFF_NOARP;
223	if (strcmp(*argv, "on") == 0) {	param = index_in_strings(str_on_off, *argv);
224		if (param < 0)
225		die_must_be_on_off("arp");
226		if (param == PARM_on)
227	flags &= ~IFF_NOARP;	flags &= ~IFF_NOARP;
228	} else if (strcmp(*argv, "off") == 0) {	else
229	flags |= IFF_NOARP;	flags |= IFF_NOARP;
230	} else	}
231	return on_off("noarp");	if (key == ARG_addr) {
	} else if (strcmp(*argv, "addr") == 0) {
232	NEXT_ARG();	NEXT_ARG();
233	newaddr = *argv;	newaddr = *argv;
234	} else {	}
235	if (strcmp(*argv, "dev") == 0) {	if (key >= ARG_dev) {
236		if (key == ARG_dev) {
237	NEXT_ARG();	NEXT_ARG();
238	}	}
239	if (dev)	if (dev)
240	duparg2("dev", *argv);	duparg2("dev", *argv);
241	dev = *argv;	dev = *argv;
242	}	}
243	argc--; argv++;	argv++;
244	}	}
245
246	if (!dev) {	if (!dev) {
247	bb_error_msg(bb_msg_requires_arg, "\"dev\"");	bb_error_msg_and_die(bb_msg_requires_arg, "\"dev\"");
	exit(-1);
248	}	}
249
250	if (newaddr || newbrd) {	if (newaddr || newbrd) {
251	halen = get_address(dev, &htype);	halen = get_address(dev, &htype);
	if (halen < 0)
	return -1;
252	if (newaddr) {	if (newaddr) {
253	if (parse_address(dev, htype, halen, newaddr, &ifr0) < 0)	parse_address(dev, htype, halen, newaddr, &ifr0);
	return -1;
254	}	}
255	if (newbrd) {	if (newbrd) {
256	if (parse_address(dev, htype, halen, newbrd, &ifr1) < 0)	parse_address(dev, htype, halen, newbrd, &ifr1);
	return -1;
257	}	}
258	}	}
259
260	if (newname && strcmp(dev, newname)) {	if (newname && strcmp(dev, newname)) {
261	if (do_changename(dev, newname) < 0)	do_changename(dev, newname);
	return -1;
262	dev = newname;	dev = newname;
263	}	}
264	if (qlen != -1) {	if (qlen != -1) {
265	if (set_qlen(dev, qlen) < 0)	set_qlen(dev, qlen);
	return -1;
266	}	}
267	if (mtu != -1) {	if (mtu != -1) {
268	if (set_mtu(dev, mtu) < 0)	set_mtu(dev, mtu);
	return -1;
269	}	}
270	if (newaddr || newbrd) {	if (newaddr || newbrd) {
271	if (newbrd) {	if (newbrd) {
272	if (set_address(&ifr1, 1) < 0)	set_address(&ifr1, 1);
	return -1;
273	}	}
274	if (newaddr) {	if (newaddr) {
275	if (set_address(&ifr0, 0) < 0)	set_address(&ifr0, 0);
	return -1;
276	}	}
277	}	}
278	if (mask)	if (mask)
279	return do_chflags(dev, flags, mask);	do_chflags(dev, flags, mask);
280	return 0;	return 0;
281	}	}
282
283	static int ipaddr_list_link(int argc, char **argv)	static int ipaddr_list_link(char **argv)
284	{	{
285	preferred_family = AF_PACKET;	preferred_family = AF_PACKET;
286	return ipaddr_list_or_flush(argc, argv, 0);	return ipaddr_list_or_flush(argv, 0);
287	}	}
288
289	int do_iplink(int argc, char **argv)	/* Return value becomes exitcode. It's okay to not return at all */
290		int do_iplink(char **argv)
291	{	{
292	if (argc > 0) {	static const char keywords[] ALIGN1 =
293	if (matches(*argv, "set") == 0)	"set\0""show\0""lst\0""list\0";
294	return do_set(argc-1, argv+1);	int key;
295	if (matches(*argv, "show") == 0 ||	if (!*argv)
296	matches(*argv, "lst") == 0 ||	return ipaddr_list_link(argv);
297	matches(*argv, "list") == 0)	key = index_in_substrings(keywords, *argv);
298	return ipaddr_list_link(argc-1, argv+1);	if (key < 0)
299	} else	bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
300	return ipaddr_list_link(0, NULL);	argv++;
301		if (key == 0) /* set */
302	bb_error_msg("command \"%s\" is unknown", *argv);	return do_set(argv);
303	exit(-1);	/* show, lst, list */
304		return ipaddr_list_link(argv);
305	}	}

---

Colored Diff Long Colored Diff Full Colored Diff Unidiff Context Diff Side by Side

Legend: Removed from v.532   changed lines   Added in v.984