1 /* vi: set sw=4 ts=4: */
5 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
10 //#include <sys/ioctl.h>
11 //#include <sys/socket.h>
13 #include <net/if_packet.h>
14 #include <netpacket/packet.h>
15 #include <net/ethernet.h>
17 #include "ip_common.h" /* #include "libbb.h" is inside */
21 /* taken from linux/sockios.h */
22 #define SIOCSIFNAME 0x8923 /* set interface name */
25 static int get_ctl_fd(void)
29 fd = socket(PF_INET, SOCK_DGRAM, 0);
32 fd = socket(PF_PACKET, SOCK_DGRAM, 0);
35 return xsocket(PF_INET6, SOCK_DGRAM, 0);
39 static void do_chflags(char *dev, uint32_t flags, uint32_t mask)
44 strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
46 xioctl(fd, SIOCGIFFLAGS, &ifr);
47 if ((ifr.ifr_flags ^ flags) & mask) {
48 ifr.ifr_flags &= ~mask;
49 ifr.ifr_flags |= mask & flags;
50 xioctl(fd, SIOCSIFFLAGS, &ifr);
56 static void do_changename(char *dev, char *newdev)
61 strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
62 strncpy(ifr.ifr_newname, newdev, sizeof(ifr.ifr_newname));
64 xioctl(fd, SIOCSIFNAME, &ifr);
69 static void set_qlen(char *dev, int qlen)
75 memset(&ifr, 0, sizeof(ifr));
76 strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
78 xioctl(s, SIOCSIFTXQLEN, &ifr);
83 static void set_mtu(char *dev, int mtu)
89 memset(&ifr, 0, sizeof(ifr));
90 strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
92 xioctl(s, SIOCSIFMTU, &ifr);
97 static int get_address(char *dev, int *htype)
100 struct sockaddr_ll me;
104 s = xsocket(PF_PACKET, SOCK_DGRAM, 0);
106 memset(&ifr, 0, sizeof(ifr));
107 strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
108 xioctl(s, SIOCGIFINDEX, &ifr);
110 memset(&me, 0, sizeof(me));
111 me.sll_family = AF_PACKET;
112 me.sll_ifindex = ifr.ifr_ifindex;
113 me.sll_protocol = htons(ETH_P_LOOP);
114 xbind(s, (struct sockaddr*)&me, sizeof(me));
117 if (getsockname(s, (struct sockaddr*)&me, &alen) == -1) {
118 bb_perror_msg_and_die("getsockname");
121 *htype = me.sll_hatype;
126 static void parse_address(char *dev, int hatype, int halen, char *lla, struct ifreq *ifr)
130 memset(ifr, 0, sizeof(*ifr));
131 strncpy(ifr->ifr_name, dev, sizeof(ifr->ifr_name));
132 ifr->ifr_hwaddr.sa_family = hatype;
133 alen = ll_addr_a2n((unsigned char *)(ifr->ifr_hwaddr.sa_data), 14, lla);
137 bb_error_msg_and_die("wrong address (%s) length: expected %d bytes", lla, halen);
142 static void set_address(struct ifreq *ifr, int brd)
148 xioctl(s, SIOCSIFHWBROADCAST, ifr);
150 xioctl(s, SIOCSIFHWADDR, ifr);
155 static void die_must_be_on_off(const char *msg) ATTRIBUTE_NORETURN;
156 static void die_must_be_on_off(const char *msg)
158 bb_error_msg_and_die("argument of \"%s\" must be \"on\" or \"off\"", msg);
161 /* Return value becomes exitcode. It's okay to not return at all */
162 static int do_set(char **argv)
169 char *newaddr = NULL;
171 struct ifreq ifr0, ifr1;
172 char *newname = NULL;
174 static const char keywords[] ALIGN1 =
175 "up\0""down\0""name\0""mtu\0""multicast\0""arp\0""addr\0""dev\0";
176 enum { ARG_up = 0, ARG_down, ARG_name, ARG_mtu, ARG_multicast, ARG_arp,
178 static const char str_on_off[] ALIGN1 = "on\0""off\0";
179 enum { PARM_on = 0, PARM_off };
183 key = index_in_strings(keywords, *argv);
188 if (key == ARG_down) {
192 if (key == ARG_name) {
196 if (key == ARG_mtu) {
199 duparg("mtu", *argv);
200 if (get_integer(&mtu, *argv, 0))
201 invarg(*argv, "mtu");
203 if (key == ARG_multicast) {
206 mask |= IFF_MULTICAST;
207 param = index_in_strings(str_on_off, *argv);
209 die_must_be_on_off("multicast");
210 if (param == PARM_on)
211 flags |= IFF_MULTICAST;
213 flags &= ~IFF_MULTICAST;
215 if (key == ARG_arp) {
219 param = index_in_strings(str_on_off, *argv);
221 die_must_be_on_off("arp");
222 if (param == PARM_on)
227 if (key == ARG_addr) {
231 if (key >= ARG_dev) {
232 if (key == ARG_dev) {
236 duparg2("dev", *argv);
243 bb_error_msg_and_die(bb_msg_requires_arg, "\"dev\"");
246 if (newaddr || newbrd) {
247 halen = get_address(dev, &htype);
249 parse_address(dev, htype, halen, newaddr, &ifr0);
252 parse_address(dev, htype, halen, newbrd, &ifr1);
256 if (newname && strcmp(dev, newname)) {
257 do_changename(dev, newname);
266 if (newaddr || newbrd) {
268 set_address(&ifr1, 1);
271 set_address(&ifr0, 0);
275 do_chflags(dev, flags, mask);
279 static int ipaddr_list_link(char **argv)
281 preferred_family = AF_PACKET;
282 return ipaddr_list_or_flush(argv, 0);
285 /* Return value becomes exitcode. It's okay to not return at all */
286 int do_iplink(char **argv)
288 static const char keywords[] ALIGN1 =
289 "set\0""show\0""lst\0""list\0";
292 return ipaddr_list_link(argv);
293 key = index_in_substrings(keywords, *argv);
295 bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
297 if (key == 0) /* set */
299 /* show, lst, list */
300 return ipaddr_list_link(argv);