/* vi: set sw=4 ts=4: */
/*
- * iplink.c "ip link".
- *
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-
-//#include <sys/ioctl.h>
-//#include <sys/socket.h>
#include <net/if.h>
#include <net/if_packet.h>
#include <netpacket/packet.h>
-#include <net/ethernet.h>
+#include <netinet/if_ether.h>
#include "ip_common.h" /* #include "libbb.h" is inside */
#include "rt_names.h"
#include "utils.h"
+#ifndef IFLA_LINKINFO
+# define IFLA_LINKINFO 18
+# define IFLA_INFO_KIND 1
+#endif
+
/* taken from linux/sockios.h */
-#define SIOCSIFNAME 0x8923 /* set interface name */
+#define SIOCSIFNAME 0x8923 /* set interface name */
/* Exits on error */
static int get_ctl_fd(void)
struct ifreq ifr;
int fd;
- strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
+ strncpy_IFNAMSIZ(ifr.ifr_name, dev);
fd = get_ctl_fd();
xioctl(fd, SIOCGIFFLAGS, &ifr);
if ((ifr.ifr_flags ^ flags) & mask) {
struct ifreq ifr;
int fd;
- strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
- strncpy(ifr.ifr_newname, newdev, sizeof(ifr.ifr_newname));
+ strncpy_IFNAMSIZ(ifr.ifr_name, dev);
+ strncpy_IFNAMSIZ(ifr.ifr_newname, newdev);
fd = get_ctl_fd();
xioctl(fd, SIOCSIFNAME, &ifr);
close(fd);
s = get_ctl_fd();
memset(&ifr, 0, sizeof(ifr));
- strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
+ strncpy_IFNAMSIZ(ifr.ifr_name, dev);
ifr.ifr_qlen = qlen;
xioctl(s, SIOCSIFTXQLEN, &ifr);
close(s);
s = get_ctl_fd();
memset(&ifr, 0, sizeof(ifr));
- strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
+ strncpy_IFNAMSIZ(ifr.ifr_name, dev);
ifr.ifr_mtu = mtu;
xioctl(s, SIOCSIFMTU, &ifr);
close(s);
s = xsocket(PF_PACKET, SOCK_DGRAM, 0);
memset(&ifr, 0, sizeof(ifr));
- strncpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
+ strncpy_IFNAMSIZ(ifr.ifr_name, dev);
xioctl(s, SIOCGIFINDEX, &ifr);
memset(&me, 0, sizeof(me));
me.sll_ifindex = ifr.ifr_ifindex;
me.sll_protocol = htons(ETH_P_LOOP);
xbind(s, (struct sockaddr*)&me, sizeof(me));
-
alen = sizeof(me);
- if (getsockname(s, (struct sockaddr*)&me, &alen) == -1) {
- bb_perror_msg_and_die("getsockname");
- }
+ getsockname(s, (struct sockaddr*)&me, &alen);
+ //never happens:
+ //if (getsockname(s, (struct sockaddr*)&me, &alen) == -1)
+ // bb_perror_msg_and_die("getsockname");
close(s);
*htype = me.sll_hatype;
return me.sll_halen;
int alen;
memset(ifr, 0, sizeof(*ifr));
- strncpy(ifr->ifr_name, dev, sizeof(ifr->ifr_name));
+ strncpy_IFNAMSIZ(ifr->ifr_name, dev);
ifr->ifr_hwaddr.sa_family = hatype;
alen = hatype == 1/*ARPHRD_ETHER*/ ? 14/*ETH_HLEN*/ : 19/*INFINIBAND_HLEN*/;
char *newname = NULL;
int htype, halen;
static const char keywords[] ALIGN1 =
- "up\0""down\0""name\0""mtu\0""multicast\0"
+ "up\0""down\0""name\0""mtu\0""qlen\0""multicast\0"
"arp\0""address\0""dev\0";
- enum { ARG_up = 0, ARG_down, ARG_name, ARG_mtu, ARG_multicast,
+ enum { ARG_up = 0, ARG_down, ARG_name, ARG_mtu, ARG_qlen, ARG_multicast,
ARG_arp, ARG_addr, ARG_dev };
static const char str_on_off[] ALIGN1 = "on\0""off\0";
enum { PARM_on = 0, PARM_off };
if (key == ARG_up) {
mask |= IFF_UP;
flags |= IFF_UP;
- }
- if (key == ARG_down) {
+ } else if (key == ARG_down) {
mask |= IFF_UP;
flags &= ~IFF_UP;
- }
- if (key == ARG_name) {
+ } else if (key == ARG_name) {
NEXT_ARG();
newname = *argv;
- }
- if (key == ARG_mtu) {
+ } else if (key == ARG_mtu) {
NEXT_ARG();
if (mtu != -1)
duparg("mtu", *argv);
- if (get_integer(&mtu, *argv, 0))
- invarg(*argv, "mtu");
- }
- if (key == ARG_multicast) {
- int param;
+ mtu = get_unsigned(*argv, "mtu");
+ } else if (key == ARG_qlen) {
NEXT_ARG();
- mask |= IFF_MULTICAST;
- param = index_in_strings(str_on_off, *argv);
- if (param < 0)
- die_must_be_on_off("multicast");
- if (param == PARM_on)
- flags |= IFF_MULTICAST;
- else
- flags &= ~IFF_MULTICAST;
- }
- if (key == ARG_arp) {
- int param;
- NEXT_ARG();
- mask |= IFF_NOARP;
- param = index_in_strings(str_on_off, *argv);
- if (param < 0)
- die_must_be_on_off("arp");
- if (param == PARM_on)
- flags &= ~IFF_NOARP;
- else
- flags |= IFF_NOARP;
- }
- if (key == ARG_addr) {
+ if (qlen != -1)
+ duparg("qlen", *argv);
+ qlen = get_unsigned(*argv, "qlen");
+ } else if (key == ARG_addr) {
NEXT_ARG();
newaddr = *argv;
- }
- if (key >= ARG_dev) {
+ } else if (key >= ARG_dev) {
if (key == ARG_dev) {
NEXT_ARG();
}
if (dev)
duparg2("dev", *argv);
dev = *argv;
+ } else {
+ int param;
+ NEXT_ARG();
+ param = index_in_strings(str_on_off, *argv);
+ if (key == ARG_multicast) {
+ if (param < 0)
+ die_must_be_on_off("multicast");
+ mask |= IFF_MULTICAST;
+ if (param == PARM_on)
+ flags |= IFF_MULTICAST;
+ else
+ flags &= ~IFF_MULTICAST;
+ } else if (key == ARG_arp) {
+ if (param < 0)
+ die_must_be_on_off("arp");
+ mask |= IFF_NOARP;
+ if (param == PARM_on)
+ flags &= ~IFF_NOARP;
+ else
+ flags |= IFF_NOARP;
+ }
}
argv++;
}
halen = get_address(dev, &htype);
if (newaddr) {
parse_address(dev, htype, halen, newaddr, &ifr0);
+ set_address(&ifr0, 0);
}
if (newbrd) {
parse_address(dev, htype, halen, newbrd, &ifr1);
+ set_address(&ifr1, 1);
}
}
if (mtu != -1) {
set_mtu(dev, mtu);
}
- if (newaddr || newbrd) {
- if (newbrd) {
- set_address(&ifr1, 1);
- }
- if (newaddr) {
- set_address(&ifr0, 0);
- }
- }
if (mask)
do_chflags(dev, flags, mask);
return 0;
return ipaddr_list_or_flush(argv, 0);
}
+#ifndef NLMSG_TAIL
+#define NLMSG_TAIL(nmsg) \
+ ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
+#endif
+/* Return value becomes exitcode. It's okay to not return at all */
+static int do_change(char **argv, const unsigned rtm)
+{
+ static const char keywords[] ALIGN1 =
+ "link\0""name\0""type\0""dev\0";
+ enum {
+ ARG_link,
+ ARG_name,
+ ARG_type,
+ ARG_dev,
+ };
+ struct rtnl_handle rth;
+ struct {
+ struct nlmsghdr n;
+ struct ifinfomsg i;
+ char buf[1024];
+ } req;
+ smalluint arg;
+ char *name_str = NULL, *link_str = NULL, *type_str = NULL, *dev_str = NULL;
+
+ memset(&req, 0, sizeof(req));
+
+ req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+ req.n.nlmsg_flags = NLM_F_REQUEST;
+ req.n.nlmsg_type = rtm;
+ req.i.ifi_family = preferred_family;
+ if (rtm == RTM_NEWLINK)
+ req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL;
+
+ while (*argv) {
+ arg = index_in_substrings(keywords, *argv);
+ if (arg == ARG_link) {
+ NEXT_ARG();
+ link_str = *argv;
+ } else if (arg == ARG_name) {
+ NEXT_ARG();
+ name_str = *argv;
+ } else if (arg == ARG_type) {
+ NEXT_ARG();
+ type_str = *argv;
+ } else {
+ if (arg == ARG_dev) {
+ if (dev_str)
+ duparg(*argv, "dev");
+ NEXT_ARG();
+ }
+ dev_str = *argv;
+ }
+ argv++;
+ }
+ xrtnl_open(&rth);
+ ll_init_map(&rth);
+ if (type_str) {
+ struct rtattr *linkinfo = NLMSG_TAIL(&req.n);
+
+ addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0);
+ addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type_str,
+ strlen(type_str));
+ linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo;
+ }
+ if (rtm != RTM_NEWLINK) {
+ if (!dev_str)
+ return 1; /* Need a device to delete */
+ req.i.ifi_index = xll_name_to_index(dev_str);
+ } else {
+ if (!name_str)
+ name_str = dev_str;
+ if (link_str) {
+ int idx = xll_name_to_index(link_str);
+ addattr_l(&req.n, sizeof(req), IFLA_LINK, &idx, 4);
+ }
+ }
+ if (name_str) {
+ const size_t name_len = strlen(name_str) + 1;
+ if (name_len < 2 || name_len > IFNAMSIZ)
+ invarg(name_str, "name");
+ addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name_str, name_len);
+ }
+ if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
+ return 2;
+ return 0;
+}
+
/* Return value becomes exitcode. It's okay to not return at all */
-int do_iplink(char **argv)
+int FAST_FUNC do_iplink(char **argv)
{
static const char keywords[] ALIGN1 =
- "set\0""show\0""lst\0""list\0";
- int key;
- if (!*argv)
- return ipaddr_list_link(argv);
- key = index_in_substrings(keywords, *argv);
- if (key < 0)
- bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
- argv++;
- if (key == 0) /* set */
- return do_set(argv);
+ "add\0""delete\0""set\0""show\0""lst\0""list\0";
+ if (*argv) {
+ smalluint key = index_in_substrings(keywords, *argv);
+ if (key > 5) /* invalid argument */
+ bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
+ argv++;
+ if (key <= 1) /* add/delete */
+ return do_change(argv, key ? RTM_DELLINK : RTM_NEWLINK);
+ else if (key == 2) /* set */
+ return do_set(argv);
+ }
/* show, lst, list */
return ipaddr_list_link(argv);
}
projects / oweals / busybox.git / blobdiff