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;
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);
139 bb_error_msg_and_die("wrong address (%s) length: expected %d bytes", lla, halen);
144 static void set_address(struct ifreq *ifr, int brd)
150 xioctl(s, SIOCSIFHWBROADCAST, ifr);
152 xioctl(s, SIOCSIFHWADDR, ifr);
157 static void die_must_be_on_off(const char *msg) ATTRIBUTE_NORETURN;
158 static void die_must_be_on_off(const char *msg)
160 bb_error_msg_and_die("argument of \"%s\" must be \"on\" or \"off\"", msg);
163 /* Return value becomes exitcode. It's okay to not return at all */
164 static int do_set(char **argv)
171 char *newaddr = NULL;
173 struct ifreq ifr0, ifr1;
174 char *newname = NULL;
176 static const char keywords[] ALIGN1 =
177 "up\0""down\0""name\0""mtu\0""multicast\0""arp\0""addr\0""dev\0";
178 enum { ARG_up = 0, ARG_down, ARG_name, ARG_mtu, ARG_multicast, ARG_arp,
180 static const char str_on_off[] ALIGN1 = "on\0""off\0";
181 enum { PARM_on = 0, PARM_off };
185 key = index_in_strings(keywords, *argv);
190 if (key == ARG_down) {
194 if (key == ARG_name) {
198 if (key == ARG_mtu) {
201 duparg("mtu", *argv);
202 if (get_integer(&mtu, *argv, 0))
203 invarg(*argv, "mtu");
205 if (key == ARG_multicast) {
208 mask |= IFF_MULTICAST;
209 param = index_in_strings(str_on_off, *argv);
211 die_must_be_on_off("multicast");
212 if (param == PARM_on)
213 flags |= IFF_MULTICAST;
215 flags &= ~IFF_MULTICAST;
217 if (key == ARG_arp) {
221 param = index_in_strings(str_on_off, *argv);
223 die_must_be_on_off("arp");
224 if (param == PARM_on)
229 if (key == ARG_addr) {
233 if (key >= ARG_dev) {
234 if (key == ARG_dev) {
238 duparg2("dev", *argv);
245 bb_error_msg_and_die(bb_msg_requires_arg, "\"dev\"");
248 if (newaddr || newbrd) {
249 halen = get_address(dev, &htype);
251 parse_address(dev, htype, halen, newaddr, &ifr0);
254 parse_address(dev, htype, halen, newbrd, &ifr1);
258 if (newname && strcmp(dev, newname)) {
259 do_changename(dev, newname);
268 if (newaddr || newbrd) {
270 set_address(&ifr1, 1);
273 set_address(&ifr0, 0);
277 do_chflags(dev, flags, mask);
281 static int ipaddr_list_link(char **argv)
283 preferred_family = AF_PACKET;
284 return ipaddr_list_or_flush(argv, 0);
287 /* Return value becomes exitcode. It's okay to not return at all */
288 int do_iplink(char **argv)
290 static const char keywords[] ALIGN1 =
291 "set\0""show\0""lst\0""list\0";
294 return ipaddr_list_link(argv);
295 key = index_in_substrings(keywords, *argv);
297 bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
299 if (key == 0) /* set */
301 /* show, lst, list */
302 return ipaddr_list_link(argv);