mirror of
https://github.com/sheumann/hush.git
synced 2024-08-16 09:29:16 +00:00
622 lines
17 KiB
C
622 lines
17 KiB
C
/* Mode: C;
|
|
*
|
|
* Mini ifenslave implementation for busybox
|
|
* Copyright (C) 2005 by Marc Leeman <marc.leeman@barco.com>
|
|
*
|
|
* ifenslave.c: Configure network interfaces for parallel routing.
|
|
*
|
|
* This program controls the Linux implementation of running multiple
|
|
* network interfaces in parallel.
|
|
*
|
|
* Author: Donald Becker <becker@cesdis.gsfc.nasa.gov>
|
|
* Copyright 1994-1996 Donald Becker
|
|
*
|
|
* 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.
|
|
*
|
|
* The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
|
|
* Center of Excellence in Space Data and Information Sciences
|
|
* Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
|
|
*
|
|
* Changes :
|
|
* - 2000/10/02 Willy Tarreau <willy at meta-x.org> :
|
|
* - few fixes. Master's MAC address is now correctly taken from
|
|
* the first device when not previously set ;
|
|
* - detach support : call BOND_RELEASE to detach an enslaved interface.
|
|
* - give a mini-howto from command-line help : # ifenslave -h
|
|
*
|
|
* - 2001/02/16 Chad N. Tindel <ctindel at ieee dot org> :
|
|
* - Master is now brought down before setting the MAC address. In
|
|
* the 2.4 kernel you can't change the MAC address while the device is
|
|
* up because you get EBUSY.
|
|
*
|
|
* - 2001/09/13 Takao Indoh <indou dot takao at jp dot fujitsu dot com>
|
|
* - Added the ability to change the active interface on a mode 1 bond
|
|
* at runtime.
|
|
*
|
|
* - 2001/10/23 Chad N. Tindel <ctindel at ieee dot org> :
|
|
* - No longer set the MAC address of the master. The bond device will
|
|
* take care of this itself
|
|
* - Try the SIOC*** versions of the bonding ioctls before using the
|
|
* old versions
|
|
* - 2002/02/18 Erik Habbinga <erik_habbinga @ hp dot com> :
|
|
* - ifr2.ifr_flags was not initialized in the hwaddr_notset case,
|
|
* SIOCGIFFLAGS now called before hwaddr_notset test
|
|
*
|
|
* - 2002/10/31 Tony Cureington <tony.cureington * hp_com> :
|
|
* - If the master does not have a hardware address when the first slave
|
|
* is enslaved, the master is assigned the hardware address of that
|
|
* slave - there is a comment in bonding.c stating "ifenslave takes
|
|
* care of this now." This corrects the problem of slaves having
|
|
* different hardware addresses in active-backup mode when
|
|
* multiple interfaces are specified on a single ifenslave command
|
|
* (ifenslave bond0 eth0 eth1).
|
|
*
|
|
* - 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and
|
|
* Shmulik Hen <shmulik.hen at intel dot com>
|
|
* - Moved setting the slave's mac address and openning it, from
|
|
* the application to the driver. This enables support of modes
|
|
* that need to use the unique mac address of each slave.
|
|
* The driver also takes care of closing the slave and restoring its
|
|
* original mac address upon release.
|
|
* In addition, block possibility of enslaving before the master is up.
|
|
* This prevents putting the system in an undefined state.
|
|
*
|
|
* - 2003/05/01 - Amir Noam <amir.noam at intel dot com>
|
|
* - Added ABI version control to restore compatibility between
|
|
* new/old ifenslave and new/old bonding.
|
|
* - Prevent adding an adapter that is already a slave.
|
|
* Fixes the problem of stalling the transmission and leaving
|
|
* the slave in a down state.
|
|
*
|
|
* - 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com>
|
|
* - Prevent enslaving if the bond device is down.
|
|
* Fixes the problem of leaving the system in unstable state and
|
|
* halting when trying to remove the module.
|
|
* - Close socket on all abnormal exists.
|
|
* - Add versioning scheme that follows that of the bonding driver.
|
|
* current version is 1.0.0 as a base line.
|
|
*
|
|
* - 2003/05/22 - Jay Vosburgh <fubar at us dot ibm dot com>
|
|
* - ifenslave -c was broken; it's now fixed
|
|
* - Fixed problem with routes vanishing from master during enslave
|
|
* processing.
|
|
*
|
|
* - 2003/05/27 - Amir Noam <amir.noam at intel dot com>
|
|
* - Fix backward compatibility issues:
|
|
* For drivers not using ABI versions, slave was set down while
|
|
* it should be left up before enslaving.
|
|
* Also, master was not set down and the default set_mac_address()
|
|
* would fail and generate an error message in the system log.
|
|
* - For opt_c: slave should not be set to the master's setting
|
|
* while it is running. It was already set during enslave. To
|
|
* simplify things, it is now handeled separately.
|
|
*
|
|
* - 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com>
|
|
* - Code cleanup and style changes
|
|
* set version to 1.1.0
|
|
*/
|
|
|
|
#include "libbb.h"
|
|
|
|
#include <net/if_arp.h>
|
|
#include <linux/if_bonding.h>
|
|
#include <linux/sockios.h>
|
|
|
|
typedef unsigned long long u64; /* hack, so we may include kernel's ethtool.h */
|
|
typedef uint32_t u32; /* ditto */
|
|
typedef uint16_t u16; /* ditto */
|
|
typedef uint8_t u8; /* ditto */
|
|
#include <linux/ethtool.h>
|
|
|
|
|
|
struct dev_data {
|
|
struct ifreq mtu, flags, hwaddr;
|
|
};
|
|
|
|
|
|
enum { skfd = 3 }; /* AF_INET socket for ioctl() calls.*/
|
|
struct globals {
|
|
unsigned abi_ver; /* userland - kernel ABI version */
|
|
smallint hwaddr_set; /* Master's hwaddr is set */
|
|
struct dev_data master;
|
|
struct dev_data slave;
|
|
};
|
|
#define G (*ptr_to_globals)
|
|
#define abi_ver (G.abi_ver )
|
|
#define hwaddr_set (G.hwaddr_set)
|
|
#define master (G.master )
|
|
#define slave (G.slave )
|
|
#define INIT_G() do { \
|
|
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
|
|
} while (0)
|
|
|
|
|
|
static void get_drv_info(char *master_ifname);
|
|
static int get_if_settings(char *ifname, struct dev_data *dd);
|
|
static int get_slave_flags(char *slave_ifname);
|
|
static int set_master_hwaddr(char *master_ifname, struct sockaddr *hwaddr);
|
|
static int set_slave_hwaddr(char *slave_ifname, struct sockaddr *hwaddr);
|
|
static int set_slave_mtu(char *slave_ifname, int mtu);
|
|
static int set_if_flags(char *ifname, short flags);
|
|
static int set_if_up(char *ifname, short flags);
|
|
static int set_if_down(char *ifname, short flags);
|
|
static int clear_if_addr(char *ifname);
|
|
static int set_if_addr(char *master_ifname, char *slave_ifname);
|
|
static void change_active(char *master_ifname, char *slave_ifname);
|
|
static int enslave(char *master_ifname, char *slave_ifname);
|
|
static int release(char *master_ifname, char *slave_ifname);
|
|
|
|
|
|
int ifenslave_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int ifenslave_main(int argc ATTRIBUTE_UNUSED, char **argv)
|
|
{
|
|
char *master_ifname, *slave_ifname;
|
|
int rv;
|
|
int res;
|
|
unsigned opt;
|
|
enum {
|
|
OPT_c = (1 << 0),
|
|
OPT_d = (1 << 1),
|
|
OPT_f = (1 << 2),
|
|
};
|
|
#if ENABLE_GETOPT_LONG
|
|
static const char ifenslave_longopts[] ALIGN1 =
|
|
"change-active" No_argument "c"
|
|
"detach" No_argument "d"
|
|
"force" No_argument "f"
|
|
;
|
|
|
|
applet_long_options = ifenslave_longopts;
|
|
#endif
|
|
opt = getopt32(argv, "cdf");
|
|
argv += optind;
|
|
if (opt & (opt-1)) /* options check */
|
|
bb_show_usage();
|
|
|
|
/* Copy the interface name */
|
|
master_ifname = *argv++;
|
|
|
|
/* No remaining args means show all interfaces. */
|
|
if (!master_ifname) {
|
|
display_interfaces(NULL);
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
/* Open a basic socket */
|
|
xmove_fd(xsocket(AF_INET, SOCK_DGRAM, 0), skfd);
|
|
|
|
/* exchange abi version with bonding module */
|
|
get_drv_info(master_ifname);
|
|
|
|
slave_ifname = *argv++;
|
|
if (!slave_ifname) {
|
|
if (opt & (OPT_d|OPT_c)) {
|
|
display_interfaces(slave_ifname);
|
|
return 2; /* why? */
|
|
}
|
|
/* A single arg means show the
|
|
* configuration for this interface
|
|
*/
|
|
display_interfaces(master_ifname);
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
res = get_if_settings(master_ifname, &master);
|
|
if (res) {
|
|
/* Probably a good reason not to go on */
|
|
bb_perror_msg_and_die("%s: can't get settings", master_ifname);
|
|
}
|
|
|
|
/* check if master is indeed a master;
|
|
* if not then fail any operation
|
|
*/
|
|
if (!(master.flags.ifr_flags & IFF_MASTER))
|
|
bb_error_msg_and_die("%s is not a master", master_ifname);
|
|
|
|
/* check if master is up; if not then fail any operation */
|
|
if (!(master.flags.ifr_flags & IFF_UP))
|
|
bb_error_msg_and_die("%s is not up", master_ifname);
|
|
|
|
/* Only for enslaving */
|
|
if (!(opt & (OPT_c|OPT_d))) {
|
|
sa_family_t master_family = master.hwaddr.ifr_hwaddr.sa_family;
|
|
|
|
/* The family '1' is ARPHRD_ETHER for ethernet. */
|
|
if (master_family != 1 && !(opt & OPT_f)) {
|
|
bb_error_msg_and_die(
|
|
"%s is not ethernet-like (-f overrides)",
|
|
master_ifname);
|
|
}
|
|
}
|
|
|
|
/* Accepts only one slave */
|
|
if (opt & OPT_c) {
|
|
/* change active slave */
|
|
res = get_slave_flags(slave_ifname);
|
|
if (res) {
|
|
bb_perror_msg_and_die(
|
|
"%s: can't get flags", slave_ifname);
|
|
}
|
|
change_active(master_ifname, slave_ifname);
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
/* Accept multiple slaves */
|
|
res = 0;
|
|
do {
|
|
if (opt & OPT_d) {
|
|
/* detach a slave interface from the master */
|
|
rv = get_slave_flags(slave_ifname);
|
|
if (rv) {
|
|
/* Can't work with this slave. */
|
|
/* remember the error and skip it*/
|
|
bb_perror_msg(
|
|
"skipping %s: can't get flags",
|
|
slave_ifname);
|
|
res = rv;
|
|
continue;
|
|
}
|
|
rv = release(master_ifname, slave_ifname);
|
|
if (rv) {
|
|
bb_perror_msg(
|
|
"master %s, slave %s: "
|
|
"can't release",
|
|
master_ifname, slave_ifname);
|
|
res = rv;
|
|
}
|
|
} else {
|
|
/* attach a slave interface to the master */
|
|
rv = get_if_settings(slave_ifname, &slave);
|
|
if (rv) {
|
|
/* Can't work with this slave. */
|
|
/* remember the error and skip it*/
|
|
bb_perror_msg(
|
|
"skipping %s: can't get settings",
|
|
slave_ifname);
|
|
res = rv;
|
|
continue;
|
|
}
|
|
rv = enslave(master_ifname, slave_ifname);
|
|
if (rv) {
|
|
bb_perror_msg(
|
|
"master %s, slave %s: "
|
|
"can't enslave",
|
|
master_ifname, slave_ifname);
|
|
res = rv;
|
|
}
|
|
}
|
|
} while ((slave_ifname = *argv++) != NULL);
|
|
|
|
if (ENABLE_FEATURE_CLEAN_UP) {
|
|
close(skfd);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static void get_drv_info(char *master_ifname)
|
|
{
|
|
struct ifreq ifr;
|
|
struct ethtool_drvinfo info;
|
|
|
|
memset(&ifr, 0, sizeof(ifr));
|
|
strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
|
|
ifr.ifr_data = (caddr_t)&info;
|
|
|
|
info.cmd = ETHTOOL_GDRVINFO;
|
|
strncpy(info.driver, "ifenslave", 32);
|
|
snprintf(info.fw_version, 32, "%d", BOND_ABI_VERSION);
|
|
|
|
if (ioctl(skfd, SIOCETHTOOL, &ifr) < 0) {
|
|
if (errno == EOPNOTSUPP)
|
|
return;
|
|
bb_perror_msg_and_die("%s: SIOCETHTOOL error", master_ifname);
|
|
}
|
|
|
|
abi_ver = bb_strtou(info.fw_version, NULL, 0);
|
|
if (errno)
|
|
bb_error_msg_and_die("%s: SIOCETHTOOL error", master_ifname);
|
|
|
|
return;
|
|
}
|
|
|
|
static void change_active(char *master_ifname, char *slave_ifname)
|
|
{
|
|
struct ifreq ifr;
|
|
|
|
if (!(slave.flags.ifr_flags & IFF_SLAVE)) {
|
|
bb_error_msg_and_die(
|
|
"%s is not a slave",
|
|
slave_ifname);
|
|
}
|
|
|
|
strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
|
|
strncpy(ifr.ifr_slave, slave_ifname, IFNAMSIZ);
|
|
if (ioctl(skfd, SIOCBONDCHANGEACTIVE, &ifr) < 0
|
|
&& ioctl(skfd, BOND_CHANGE_ACTIVE_OLD, &ifr) < 0
|
|
) {
|
|
bb_perror_msg_and_die(
|
|
"master %s, slave %s: can't "
|
|
"change active",
|
|
master_ifname, slave_ifname);
|
|
}
|
|
}
|
|
|
|
static int enslave(char *master_ifname, char *slave_ifname)
|
|
{
|
|
struct ifreq ifr;
|
|
int res;
|
|
|
|
if (slave.flags.ifr_flags & IFF_SLAVE) {
|
|
bb_error_msg(
|
|
"%s is already a slave",
|
|
slave_ifname);
|
|
return 1;
|
|
}
|
|
|
|
res = set_if_down(slave_ifname, slave.flags.ifr_flags);
|
|
if (res)
|
|
return res;
|
|
|
|
if (abi_ver < 2) {
|
|
/* Older bonding versions would panic if the slave has no IP
|
|
* address, so get the IP setting from the master.
|
|
*/
|
|
res = set_if_addr(master_ifname, slave_ifname);
|
|
if (res) {
|
|
bb_perror_msg("%s: can't set address", slave_ifname);
|
|
return res;
|
|
}
|
|
} else {
|
|
res = clear_if_addr(slave_ifname);
|
|
if (res) {
|
|
bb_perror_msg("%s: can't clear address", slave_ifname);
|
|
return res;
|
|
}
|
|
}
|
|
|
|
if (master.mtu.ifr_mtu != slave.mtu.ifr_mtu) {
|
|
res = set_slave_mtu(slave_ifname, master.mtu.ifr_mtu);
|
|
if (res) {
|
|
bb_perror_msg("%s: can't set MTU", slave_ifname);
|
|
return res;
|
|
}
|
|
}
|
|
|
|
if (hwaddr_set) {
|
|
/* Master already has an hwaddr
|
|
* so set it's hwaddr to the slave
|
|
*/
|
|
if (abi_ver < 1) {
|
|
/* The driver is using an old ABI, so
|
|
* the application sets the slave's
|
|
* hwaddr
|
|
*/
|
|
res = set_slave_hwaddr(slave_ifname,
|
|
&(master.hwaddr.ifr_hwaddr));
|
|
if (res) {
|
|
bb_perror_msg("%s: can't set hw address",
|
|
slave_ifname);
|
|
goto undo_mtu;
|
|
}
|
|
|
|
/* For old ABI the application needs to bring the
|
|
* slave back up
|
|
*/
|
|
res = set_if_up(slave_ifname, slave.flags.ifr_flags);
|
|
if (res)
|
|
goto undo_slave_mac;
|
|
}
|
|
/* The driver is using a new ABI,
|
|
* so the driver takes care of setting
|
|
* the slave's hwaddr and bringing
|
|
* it up again
|
|
*/
|
|
} else {
|
|
/* No hwaddr for master yet, so
|
|
* set the slave's hwaddr to it
|
|
*/
|
|
if (abi_ver < 1) {
|
|
/* For old ABI, the master needs to be
|
|
* down before setting it's hwaddr
|
|
*/
|
|
res = set_if_down(master_ifname, master.flags.ifr_flags);
|
|
if (res)
|
|
goto undo_mtu;
|
|
}
|
|
|
|
res = set_master_hwaddr(master_ifname,
|
|
&(slave.hwaddr.ifr_hwaddr));
|
|
if (res) {
|
|
bb_error_msg("%s: can't set hw address",
|
|
master_ifname);
|
|
goto undo_mtu;
|
|
}
|
|
|
|
if (abi_ver < 1) {
|
|
/* For old ABI, bring the master
|
|
* back up
|
|
*/
|
|
res = set_if_up(master_ifname, master.flags.ifr_flags);
|
|
if (res)
|
|
goto undo_master_mac;
|
|
}
|
|
|
|
hwaddr_set = 1;
|
|
}
|
|
|
|
/* Do the real thing */
|
|
strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
|
|
strncpy(ifr.ifr_slave, slave_ifname, IFNAMSIZ);
|
|
if (ioctl(skfd, SIOCBONDENSLAVE, &ifr) < 0
|
|
&& ioctl(skfd, BOND_ENSLAVE_OLD, &ifr) < 0
|
|
) {
|
|
res = 1;
|
|
}
|
|
|
|
if (res)
|
|
goto undo_master_mac;
|
|
|
|
return 0;
|
|
|
|
/* rollback (best effort) */
|
|
undo_master_mac:
|
|
set_master_hwaddr(master_ifname, &(master.hwaddr.ifr_hwaddr));
|
|
hwaddr_set = 0;
|
|
goto undo_mtu;
|
|
undo_slave_mac:
|
|
set_slave_hwaddr(slave_ifname, &(slave.hwaddr.ifr_hwaddr));
|
|
undo_mtu:
|
|
set_slave_mtu(slave_ifname, slave.mtu.ifr_mtu);
|
|
return res;
|
|
}
|
|
|
|
static int release(char *master_ifname, char *slave_ifname)
|
|
{
|
|
struct ifreq ifr;
|
|
int res = 0;
|
|
|
|
if (!(slave.flags.ifr_flags & IFF_SLAVE)) {
|
|
bb_error_msg("%s is not a slave",
|
|
slave_ifname);
|
|
return 1;
|
|
}
|
|
|
|
strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
|
|
strncpy(ifr.ifr_slave, slave_ifname, IFNAMSIZ);
|
|
if (ioctl(skfd, SIOCBONDRELEASE, &ifr) < 0
|
|
&& ioctl(skfd, BOND_RELEASE_OLD, &ifr) < 0
|
|
) {
|
|
return 1;
|
|
}
|
|
if (abi_ver < 1) {
|
|
/* The driver is using an old ABI, so we'll set the interface
|
|
* down to avoid any conflicts due to same MAC/IP
|
|
*/
|
|
res = set_if_down(slave_ifname, slave.flags.ifr_flags);
|
|
}
|
|
|
|
/* set to default mtu */
|
|
set_slave_mtu(slave_ifname, 1500);
|
|
|
|
return res;
|
|
}
|
|
|
|
static int get_if_settings(char *ifname, struct dev_data *dd)
|
|
{
|
|
int res;
|
|
|
|
strncpy(dd->mtu.ifr_name, ifname, IFNAMSIZ);
|
|
res = ioctl(skfd, SIOCGIFMTU, &dd->mtu);
|
|
strncpy(dd->flags.ifr_name, ifname, IFNAMSIZ);
|
|
res |= ioctl(skfd, SIOCGIFFLAGS, &dd->flags);
|
|
strncpy(dd->hwaddr.ifr_name, ifname, IFNAMSIZ);
|
|
res |= ioctl(skfd, SIOCGIFHWADDR, &dd->hwaddr);
|
|
|
|
return res;
|
|
}
|
|
|
|
static int get_slave_flags(char *slave_ifname)
|
|
{
|
|
strncpy(slave.flags.ifr_name, slave_ifname, IFNAMSIZ);
|
|
return ioctl(skfd, SIOCGIFFLAGS, &slave.flags);
|
|
}
|
|
|
|
static int set_master_hwaddr(char *master_ifname, struct sockaddr *hwaddr)
|
|
{
|
|
struct ifreq ifr;
|
|
|
|
strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
|
|
memcpy(&(ifr.ifr_hwaddr), hwaddr, sizeof(struct sockaddr));
|
|
return ioctl(skfd, SIOCSIFHWADDR, &ifr);
|
|
}
|
|
|
|
static int set_slave_hwaddr(char *slave_ifname, struct sockaddr *hwaddr)
|
|
{
|
|
struct ifreq ifr;
|
|
|
|
strncpy(ifr.ifr_name, slave_ifname, IFNAMSIZ);
|
|
memcpy(&(ifr.ifr_hwaddr), hwaddr, sizeof(struct sockaddr));
|
|
return ioctl(skfd, SIOCSIFHWADDR, &ifr);
|
|
}
|
|
|
|
static int set_slave_mtu(char *slave_ifname, int mtu)
|
|
{
|
|
struct ifreq ifr;
|
|
|
|
ifr.ifr_mtu = mtu;
|
|
strncpy(ifr.ifr_name, slave_ifname, IFNAMSIZ);
|
|
return ioctl(skfd, SIOCSIFMTU, &ifr);
|
|
}
|
|
|
|
static int set_if_flags(char *ifname, short flags)
|
|
{
|
|
struct ifreq ifr;
|
|
|
|
ifr.ifr_flags = flags;
|
|
strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
|
|
return ioctl(skfd, SIOCSIFFLAGS, &ifr);
|
|
}
|
|
|
|
static int set_if_up(char *ifname, short flags)
|
|
{
|
|
int res = set_if_flags(ifname, flags | IFF_UP);
|
|
if (res)
|
|
bb_perror_msg("%s: can't up", ifname);
|
|
return res;
|
|
}
|
|
|
|
static int set_if_down(char *ifname, short flags)
|
|
{
|
|
int res = set_if_flags(ifname, flags & ~IFF_UP);
|
|
if (res)
|
|
bb_perror_msg("%s: can't down", ifname);
|
|
return res;
|
|
}
|
|
|
|
static int clear_if_addr(char *ifname)
|
|
{
|
|
struct ifreq ifr;
|
|
|
|
strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
|
|
ifr.ifr_addr.sa_family = AF_INET;
|
|
memset(ifr.ifr_addr.sa_data, 0, sizeof(ifr.ifr_addr.sa_data));
|
|
return ioctl(skfd, SIOCSIFADDR, &ifr);
|
|
}
|
|
|
|
static int set_if_addr(char *master_ifname, char *slave_ifname)
|
|
{
|
|
static const struct {
|
|
int g_ioctl;
|
|
int s_ioctl;
|
|
} ifra[] = {
|
|
{ SIOCGIFADDR, SIOCSIFADDR },
|
|
{ SIOCGIFDSTADDR, SIOCSIFDSTADDR },
|
|
{ SIOCGIFBRDADDR, SIOCSIFBRDADDR },
|
|
{ SIOCGIFNETMASK, SIOCSIFNETMASK },
|
|
};
|
|
|
|
struct ifreq ifr;
|
|
int res;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ifra); i++) {
|
|
strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
|
|
res = ioctl(skfd, ifra[i].g_ioctl, &ifr);
|
|
if (res < 0) {
|
|
ifr.ifr_addr.sa_family = AF_INET;
|
|
memset(ifr.ifr_addr.sa_data, 0,
|
|
sizeof(ifr.ifr_addr.sa_data));
|
|
}
|
|
|
|
strncpy(ifr.ifr_name, slave_ifname, IFNAMSIZ);
|
|
res = ioctl(skfd, ifra[i].s_ioctl, &ifr);
|
|
if (res < 0)
|
|
return res;
|
|
}
|
|
|
|
return 0;
|
|
}
|