+++ /dev/null
-/*
- * iplink.c "ip link".
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
- *
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <sys/socket.h>
-#include <linux/if.h>
-#include <linux/if_packet.h>
-#include <linux/if_ether.h>
-#include <linux/sockios.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <linux/sockios.h>
-
-#include "rt_names.h"
-#include "utils.h"
-#include "ip_common.h"
-
-
-static void usage(void) __attribute__((noreturn));
-
-void iplink_usage(void)
-{
- fprintf(stderr, "Usage: ip link set DEVICE { up | down |\n");
- fprintf(stderr, " arp { on | off } |\n");
- fprintf(stderr, " dynamic { on | off } |\n");
- fprintf(stderr, " multicast { on | off } |\n");
- fprintf(stderr, " allmulticast { on | off } |\n");
- fprintf(stderr, " promisc { on | off } |\n");
- fprintf(stderr, " trailers { on | off } |\n");
- fprintf(stderr, " txqueuelen PACKETS |\n");
- fprintf(stderr, " name NEWNAME |\n");
- fprintf(stderr, " address LLADDR | broadcast LLADDR |\n");
- fprintf(stderr, " mtu MTU }\n");
- fprintf(stderr, " ip link show [ DEVICE ]\n");
- exit(-1);
-}
-
-static void usage(void)
-{
- iplink_usage();
-}
-
-static int on_off(char *msg)
-{
- fprintf(stderr, "Error: argument of \"%s\" must be \"on\" or \"off\"\n", msg);
- return -1;
-}
-
-static int get_ctl_fd(void)
-{
- int s_errno;
- int fd;
-
- fd = socket(PF_INET, SOCK_DGRAM, 0);
- if (fd >= 0)
- return fd;
- s_errno = errno;
- fd = socket(PF_PACKET, SOCK_DGRAM, 0);
- if (fd >= 0)
- return fd;
- fd = socket(PF_INET6, SOCK_DGRAM, 0);
- if (fd >= 0)
- return fd;
- errno = s_errno;
- perror("Cannot create control socket");
- return -1;
-}
-
-static int do_chflags(const char *dev, __u32 flags, __u32 mask)
-{
- struct ifreq ifr;
- int fd;
- int err;
-
- strncpy(ifr.ifr_name, dev, IFNAMSIZ);
- fd = get_ctl_fd();
- if (fd < 0)
- return -1;
- err = ioctl(fd, SIOCGIFFLAGS, &ifr);
- if (err) {
- perror("SIOCGIFFLAGS");
- close(fd);
- return -1;
- }
- if ((ifr.ifr_flags^flags)&mask) {
- ifr.ifr_flags &= ~mask;
- ifr.ifr_flags |= mask&flags;
- err = ioctl(fd, SIOCSIFFLAGS, &ifr);
- if (err)
- perror("SIOCSIFFLAGS");
- }
- close(fd);
- return err;
-}
-
-static int do_changename(const char *dev, const char *newdev)
-{
- struct ifreq ifr;
- int fd;
- int err;
-
- strncpy(ifr.ifr_name, dev, IFNAMSIZ);
- strncpy(ifr.ifr_newname, newdev, IFNAMSIZ);
- fd = get_ctl_fd();
- if (fd < 0)
- return -1;
- err = ioctl(fd, SIOCSIFNAME, &ifr);
- if (err) {
- perror("SIOCSIFNAME");
- close(fd);
- return -1;
- }
- close(fd);
- return err;
-}
-
-static int set_qlen(const char *dev, int qlen)
-{
- struct ifreq ifr;
- int s;
-
- s = get_ctl_fd();
- if (s < 0)
- return -1;
-
- memset(&ifr, 0, sizeof(ifr));
- strncpy(ifr.ifr_name, dev, IFNAMSIZ);
- ifr.ifr_qlen = qlen;
- if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {
- perror("SIOCSIFXQLEN");
- close(s);
- return -1;
- }
- close(s);
-
- return 0;
-}
-
-static int set_mtu(const char *dev, int mtu)
-{
- struct ifreq ifr;
- int s;
-
- s = get_ctl_fd();
- if (s < 0)
- return -1;
-
- memset(&ifr, 0, sizeof(ifr));
- strncpy(ifr.ifr_name, dev, IFNAMSIZ);
- ifr.ifr_mtu = mtu;
- if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {
- perror("SIOCSIFMTU");
- close(s);
- return -1;
- }
- close(s);
-
- return 0;
-}
-
-static int get_address(const char *dev, int *htype)
-{
- struct ifreq ifr;
- struct sockaddr_ll me;
- socklen_t alen;
- int s;
-
- s = socket(PF_PACKET, SOCK_DGRAM, 0);
- if (s < 0) {
- perror("socket(PF_PACKET)");
- return -1;
- }
-
- memset(&ifr, 0, sizeof(ifr));
- strncpy(ifr.ifr_name, dev, IFNAMSIZ);
- if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
- perror("SIOCGIFINDEX");
- close(s);
- return -1;
- }
-
- memset(&me, 0, sizeof(me));
- me.sll_family = AF_PACKET;
- me.sll_ifindex = ifr.ifr_ifindex;
- me.sll_protocol = htons(ETH_P_LOOP);
- if (bind(s, (struct sockaddr*)&me, sizeof(me)) == -1) {
- perror("bind");
- close(s);
- return -1;
- }
-
- alen = sizeof(me);
- if (getsockname(s, (struct sockaddr*)&me, &alen) == -1) {
- perror("getsockname");
- close(s);
- return -1;
- }
- close(s);
- *htype = me.sll_hatype;
- return me.sll_halen;
-}
-
-static int parse_address(const char *dev, int hatype, int halen,
- char *lla, struct ifreq *ifr)
-{
- int alen;
-
- memset(ifr, 0, sizeof(*ifr));
- strncpy(ifr->ifr_name, dev, IFNAMSIZ);
- ifr->ifr_hwaddr.sa_family = hatype;
- alen = ll_addr_a2n(ifr->ifr_hwaddr.sa_data, 14, lla);
- if (alen < 0)
- return -1;
- if (alen != halen) {
- fprintf(stderr, "Wrong address (%s) length: expected %d bytes\n", lla, halen);
- return -1;
- }
- return 0;
-}
-
-static int set_address(struct ifreq *ifr, int brd)
-{
- int s;
-
- s = get_ctl_fd();
- if (s < 0)
- return -1;
- if (ioctl(s, brd?SIOCSIFHWBROADCAST:SIOCSIFHWADDR, ifr) < 0) {
- perror(brd?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR");
- close(s);
- return -1;
- }
- close(s);
- return 0;
-}
-
-
-static int do_set(int argc, char **argv)
-{
- char *dev = NULL;
- __u32 mask = 0;
- __u32 flags = 0;
- int qlen = -1;
- int mtu = -1;
- char *newaddr = NULL;
- char *newbrd = NULL;
- struct ifreq ifr0, ifr1;
- char *newname = NULL;
- int htype, halen;
-
- while (argc > 0) {
- if (strcmp(*argv, "up") == 0) {
- mask |= IFF_UP;
- flags |= IFF_UP;
- } else if (strcmp(*argv, "down") == 0) {
- mask |= IFF_UP;
- flags &= ~IFF_UP;
- } else if (strcmp(*argv, "name") == 0) {
- NEXT_ARG();
- newname = *argv;
- } else if (matches(*argv, "address") == 0) {
- NEXT_ARG();
- newaddr = *argv;
- } else if (matches(*argv, "broadcast") == 0 ||
- strcmp(*argv, "brd") == 0) {
- NEXT_ARG();
- newbrd = *argv;
- } else if (matches(*argv, "txqueuelen") == 0 ||
- strcmp(*argv, "qlen") == 0 ||
- matches(*argv, "txqlen") == 0) {
- NEXT_ARG();
- if (qlen != -1)
- duparg("txqueuelen", *argv);
- if (get_integer(&qlen, *argv, 0))
- invarg("Invalid \"txqueuelen\" value\n", *argv);
- } else if (strcmp(*argv, "mtu") == 0) {
- NEXT_ARG();
- if (mtu != -1)
- duparg("mtu", *argv);
- if (get_integer(&mtu, *argv, 0))
- invarg("Invalid \"mtu\" value\n", *argv);
- } else if (strcmp(*argv, "multicast") == 0) {
- NEXT_ARG();
- mask |= IFF_MULTICAST;
- if (strcmp(*argv, "on") == 0) {
- flags |= IFF_MULTICAST;
- } else if (strcmp(*argv, "off") == 0) {
- flags &= ~IFF_MULTICAST;
- } else
- return on_off("multicast");
- } else if (strcmp(*argv, "allmulticast") == 0) {
- NEXT_ARG();
- mask |= IFF_ALLMULTI;
- if (strcmp(*argv, "on") == 0) {
- flags |= IFF_ALLMULTI;
- } else if (strcmp(*argv, "off") == 0) {
- flags &= ~IFF_ALLMULTI;
- } else
- return on_off("allmulticast");
- } else if (strcmp(*argv, "promisc") == 0) {
- NEXT_ARG();
- mask |= IFF_PROMISC;
- if (strcmp(*argv, "on") == 0) {
- flags |= IFF_PROMISC;
- } else if (strcmp(*argv, "off") == 0) {
- flags &= ~IFF_PROMISC;
- } else
- return on_off("promisc");
- } else if (strcmp(*argv, "trailers") == 0) {
- NEXT_ARG();
- mask |= IFF_NOTRAILERS;
- if (strcmp(*argv, "off") == 0) {
- flags |= IFF_NOTRAILERS;
- } else if (strcmp(*argv, "on") == 0) {
- flags &= ~IFF_NOTRAILERS;
- } else
- return on_off("trailers");
- } else if (strcmp(*argv, "arp") == 0) {
- NEXT_ARG();
- mask |= IFF_NOARP;
- if (strcmp(*argv, "on") == 0) {
- flags &= ~IFF_NOARP;
- } else if (strcmp(*argv, "off") == 0) {
- flags |= IFF_NOARP;
- } else
- return on_off("noarp");
-#ifdef IFF_DYNAMIC
- } else if (matches(*argv, "dynamic") == 0) {
- NEXT_ARG();
- mask |= IFF_DYNAMIC;
- if (strcmp(*argv, "on") == 0) {
- flags |= IFF_DYNAMIC;
- } else if (strcmp(*argv, "off") == 0) {
- flags &= ~IFF_DYNAMIC;
- } else
- return on_off("dynamic");
-#endif
- } else {
- if (strcmp(*argv, "dev") == 0) {
- NEXT_ARG();
- }
- if (matches(*argv, "help") == 0)
- usage();
- if (dev)
- duparg2("dev", *argv);
- dev = *argv;
- }
- argc--; argv++;
- }
-
- if (!dev) {
- fprintf(stderr, "Not enough of information: \"dev\" argument is required.\n");
- exit(-1);
- }
-
- if (newaddr || newbrd) {
- halen = get_address(dev, &htype);
- if (halen < 0)
- return -1;
- if (newaddr) {
- if (parse_address(dev, htype, halen, newaddr, &ifr0) < 0)
- return -1;
- }
- if (newbrd) {
- if (parse_address(dev, htype, halen, newbrd, &ifr1) < 0)
- return -1;
- }
- }
-
- if (newname && strcmp(dev, newname)) {
- if (do_changename(dev, newname) < 0)
- return -1;
- dev = newname;
- }
- if (qlen != -1) {
- if (set_qlen(dev, qlen) < 0)
- return -1;
- }
- if (mtu != -1) {
- if (set_mtu(dev, mtu) < 0)
- return -1;
- }
- if (newaddr || newbrd) {
- if (newbrd) {
- if (set_address(&ifr1, 1) < 0)
- return -1;
- }
- if (newaddr) {
- if (set_address(&ifr0, 0) < 0)
- return -1;
- }
- }
- if (mask)
- return do_chflags(dev, flags, mask);
- return 0;
-}
-
-int do_iplink(int argc, char **argv)
-{
- if (argc > 0) {
- if (matches(*argv, "set") == 0)
- return do_set(argc-1, argv+1);
- if (matches(*argv, "show") == 0 ||
- matches(*argv, "lst") == 0 ||
- matches(*argv, "list") == 0)
- return ipaddr_list_link(argc-1, argv+1);
- if (matches(*argv, "help") == 0)
- usage();
- } else
- return ipaddr_list_link(0, NULL);
-
- fprintf(stderr, "Command \"%s\" is unknown, try \"ip link help\".\n", *argv);
- exit(-1);
-}
git://git.onelab.eu / iproute2.git / blobdiff