4 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
6 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
11 #include <sys/ioctl.h>
12 #include <sys/socket.h>
19 #include <net/if_packet.h>
20 #include <netpacket/packet.h>
22 #include <net/ethernet.h>
26 #include "ip_common.h"
28 /* take from linux/sockios.h */
29 #define SIOCSIFNAME 0x8923 /* set interface name */
33 static int on_off(char *msg)
35 bb_error_msg("Error: argument of \"%s\" must be \"on\" or \"off\"", msg);
39 static int get_ctl_fd(void)
44 fd = socket(PF_INET, SOCK_DGRAM, 0);
48 fd = socket(PF_PACKET, SOCK_DGRAM, 0);
51 fd = socket(PF_INET6, SOCK_DGRAM, 0);
55 perror("Cannot create control socket");
59 static int do_chflags(char *dev, __u32 flags, __u32 mask)
65 strcpy(ifr.ifr_name, dev);
69 err = ioctl(fd, SIOCGIFFLAGS, &ifr);
71 perror("SIOCGIFFLAGS");
75 if ((ifr.ifr_flags^flags)&mask) {
76 ifr.ifr_flags &= ~mask;
77 ifr.ifr_flags |= mask&flags;
78 err = ioctl(fd, SIOCSIFFLAGS, &ifr);
80 perror("SIOCSIFFLAGS");
86 static int do_changename(char *dev, char *newdev)
92 strcpy(ifr.ifr_name, dev);
93 strcpy(ifr.ifr_newname, newdev);
97 err = ioctl(fd, SIOCSIFNAME, &ifr);
99 perror("SIOCSIFNAME");
107 static int set_qlen(char *dev, int qlen)
116 memset(&ifr, 0, sizeof(ifr));
117 strcpy(ifr.ifr_name, dev);
119 if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {
120 perror("SIOCSIFXQLEN");
129 static int set_mtu(char *dev, int mtu)
138 memset(&ifr, 0, sizeof(ifr));
139 strcpy(ifr.ifr_name, dev);
141 if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {
142 perror("SIOCSIFMTU");
151 static int get_address(char *dev, int *htype)
154 struct sockaddr_ll me;
158 s = socket(PF_PACKET, SOCK_DGRAM, 0);
160 perror("socket(PF_PACKET)");
164 memset(&ifr, 0, sizeof(ifr));
165 strcpy(ifr.ifr_name, dev);
166 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
167 perror("SIOCGIFINDEX");
172 memset(&me, 0, sizeof(me));
173 me.sll_family = AF_PACKET;
174 me.sll_ifindex = ifr.ifr_ifindex;
175 me.sll_protocol = htons(ETH_P_LOOP);
176 if (bind(s, (struct sockaddr*)&me, sizeof(me)) == -1) {
183 if (getsockname(s, (struct sockaddr*)&me, &alen) == -1) {
184 perror("getsockname");
189 *htype = me.sll_hatype;
193 static int parse_address(char *dev, int hatype, int halen, char *lla, struct ifreq *ifr)
197 memset(ifr, 0, sizeof(*ifr));
198 strcpy(ifr->ifr_name, dev);
199 ifr->ifr_hwaddr.sa_family = hatype;
200 alen = ll_addr_a2n((unsigned char *)(ifr->ifr_hwaddr.sa_data), 14, lla);
204 bb_error_msg("Wrong address (%s) length: expected %d bytes", lla, halen);
210 static int set_address(struct ifreq *ifr, int brd)
217 if (ioctl(s, brd?SIOCSIFHWBROADCAST:SIOCSIFHWADDR, ifr) < 0) {
218 perror(brd?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR");
227 static int do_set(int argc, char **argv)
234 char *newaddr = NULL;
236 struct ifreq ifr0, ifr1;
237 char *newname = NULL;
241 if (strcmp(*argv, "up") == 0) {
244 } else if (strcmp(*argv, "down") == 0) {
247 } else if (strcmp(*argv, "name") == 0) {
250 } else if (strcmp(*argv, "mtu") == 0) {
253 duparg("mtu", *argv);
254 if (get_integer(&mtu, *argv, 0))
255 invarg(*argv, "mtu");
256 } else if (strcmp(*argv, "multicast") == 0) {
258 mask |= IFF_MULTICAST;
259 if (strcmp(*argv, "on") == 0) {
260 flags |= IFF_MULTICAST;
261 } else if (strcmp(*argv, "off") == 0) {
262 flags &= ~IFF_MULTICAST;
264 return on_off("multicast");
265 } else if (strcmp(*argv, "arp") == 0) {
268 if (strcmp(*argv, "on") == 0) {
270 } else if (strcmp(*argv, "off") == 0) {
273 return on_off("noarp");
274 } else if (strcmp(*argv, "addr") == 0) {
278 if (strcmp(*argv, "dev") == 0) {
282 duparg2("dev", *argv);
289 bb_error_msg(bb_msg_requires_arg, "\"dev\"");
293 if (newaddr || newbrd) {
294 halen = get_address(dev, &htype);
298 if (parse_address(dev, htype, halen, newaddr, &ifr0) < 0)
302 if (parse_address(dev, htype, halen, newbrd, &ifr1) < 0)
307 if (newname && strcmp(dev, newname)) {
308 if (do_changename(dev, newname) < 0)
313 if (set_qlen(dev, qlen) < 0)
317 if (set_mtu(dev, mtu) < 0)
320 if (newaddr || newbrd) {
322 if (set_address(&ifr1, 1) < 0)
326 if (set_address(&ifr0, 0) < 0)
331 return do_chflags(dev, flags, mask);
335 static int ipaddr_list_link(int argc, char **argv)
337 preferred_family = AF_PACKET;
339 return ipaddr_list_or_flush(argc, argv, 0);
342 int do_iplink(int argc, char **argv)
345 if (matches(*argv, "set") == 0)
346 return do_set(argc-1, argv+1);
347 if (matches(*argv, "show") == 0 ||
348 matches(*argv, "lst") == 0 ||
349 matches(*argv, "list") == 0)
350 return ipaddr_list_link(argc-1, argv+1);
352 return ipaddr_list_link(0, NULL);
354 bb_error_msg("Command \"%s\" is unknown.", *argv);