};
-enum { skfd = 3 }; /* AF_INET socket for ioctl() calls.*/
+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 */
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 set_hwaddr(char *ifname, struct sockaddr *hwaddr);
+static int set_mtu(char *ifname, int mtu);
+static int set_if_flags(char *ifname, int flags);
+static int set_if_up(char *ifname, int flags);
+static int set_if_down(char *ifname, int 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);
strncpy(dst, src, IFNAMSIZ);
}
+static int ioctl_on_skfd(unsigned request, struct ifreq *ifr)
+{
+ return ioctl(skfd, request, ifr);
+}
+
+static int set_ifrname_and_do_ioctl(unsigned request, struct ifreq *ifr, const char *ifname)
+{
+ strncpy_IFNAMSIZ(ifr->ifr_name, ifname);
+ return ioctl_on_skfd(request, ifr);
+}
+
int ifenslave_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int ifenslave_main(int argc ATTRIBUTE_UNUSED, char **argv)
{
};
#if ENABLE_GETOPT_LONG
static const char ifenslave_longopts[] ALIGN1 =
- "change-active" No_argument "c"
- "detach" No_argument "d"
- "force" No_argument "f"
- ;
+ "change-active\0" No_argument "c"
+ "detach\0" No_argument "d"
+ "force\0" No_argument "f"
+ ;
applet_long_options = ifenslave_longopts;
#endif
if (opt & (opt-1)) /* options check */
bb_show_usage();
- /* Copy the interface name */
master_ifname = *argv++;
- /* No remaining args means show all interfaces. */
+ /* No interface names - 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 */
+ /* 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? */
+ /* --change or --detach, and no slaves given -
+ * show all interfaces. */
+ display_interfaces(slave_ifname /* == NULL */);
+ return 2; /* why 2? */
}
/* A single arg means show the
* configuration for this interface
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;
-
+ /* No opts: neither -c[hange] nor -d[etach] -> it's "enslave" then;
+ * and -f[orce] is not there too */
+ if (!opt) {
/* The family '1' is ARPHRD_ETHER for ethernet. */
- if (master_family != 1 && !(opt & OPT_f)) {
+ if (master.hwaddr.ifr_hwaddr.sa_family != 1) {
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) {
+ if (get_slave_flags(slave_ifname)) {
bb_perror_msg_and_die(
"%s: can't get flags", slave_ifname);
}
/* 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*/
+ /* Can't work with this slave, */
+ /* remember the error and skip it */
bb_perror_msg(
"skipping %s: can't get flags",
slave_ifname);
/* 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*/
+ /* Can't work with this slave, */
+ /* remember the error and skip it */
bb_perror_msg(
"skipping %s: can't get settings",
slave_ifname);
struct ethtool_drvinfo info;
memset(&ifr, 0, sizeof(ifr));
- strncpy_IFNAMSIZ(ifr.ifr_name, master_ifname);
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 (set_ifrname_and_do_ioctl(SIOCETHTOOL, &ifr, master_ifname) < 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)
slave_ifname);
}
- strncpy_IFNAMSIZ(ifr.ifr_name, master_ifname);
strncpy_IFNAMSIZ(ifr.ifr_slave, slave_ifname);
- if (ioctl(skfd, SIOCBONDCHANGEACTIVE, &ifr) < 0
- && ioctl(skfd, BOND_CHANGE_ACTIVE_OLD, &ifr) < 0
+ if (set_ifrname_and_do_ioctl(SIOCBONDCHANGEACTIVE, &ifr, master_ifname)
+ && ioctl_on_skfd(BOND_CHANGE_ACTIVE_OLD, &ifr)
) {
bb_perror_msg_and_die(
"master %s, slave %s: can't "
}
if (master.mtu.ifr_mtu != slave.mtu.ifr_mtu) {
- res = set_slave_mtu(slave_ifname, master.mtu.ifr_mtu);
+ res = set_mtu(slave_ifname, master.mtu.ifr_mtu);
if (res) {
bb_perror_msg("%s: can't set MTU", slave_ifname);
return res;
* the application sets the slave's
* hwaddr
*/
- res = set_slave_hwaddr(slave_ifname,
- &(master.hwaddr.ifr_hwaddr));
- if (res) {
+ if (set_hwaddr(slave_ifname, &(master.hwaddr.ifr_hwaddr))) {
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)
+ if (set_if_up(slave_ifname, slave.flags.ifr_flags))
goto undo_slave_mac;
}
/* The driver is using a new ABI,
/* 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)
+ if (set_if_down(master_ifname, master.flags.ifr_flags))
goto undo_mtu;
}
- res = set_master_hwaddr(master_ifname,
- &(slave.hwaddr.ifr_hwaddr));
- if (res) {
+ if (set_hwaddr(master_ifname, &(slave.hwaddr.ifr_hwaddr))) {
bb_error_msg("%s: can't set hw address",
master_ifname);
goto undo_mtu;
/* For old ABI, bring the master
* back up
*/
- res = set_if_up(master_ifname, master.flags.ifr_flags);
- if (res)
+ if (set_if_up(master_ifname, master.flags.ifr_flags))
goto undo_master_mac;
}
}
/* Do the real thing */
- strncpy_IFNAMSIZ(ifr.ifr_name, master_ifname);
strncpy_IFNAMSIZ(ifr.ifr_slave, slave_ifname);
- if (ioctl(skfd, SIOCBONDENSLAVE, &ifr) < 0
- && ioctl(skfd, BOND_ENSLAVE_OLD, &ifr) < 0
+ if (set_ifrname_and_do_ioctl(SIOCBONDENSLAVE, &ifr, master_ifname)
+ && ioctl_on_skfd(BOND_ENSLAVE_OLD, &ifr)
) {
- 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));
+ set_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));
+ set_hwaddr(slave_ifname, &(slave.hwaddr.ifr_hwaddr));
undo_mtu:
- set_slave_mtu(slave_ifname, slave.mtu.ifr_mtu);
- return res;
+ set_mtu(slave_ifname, slave.mtu.ifr_mtu);
+ return 1;
}
static int release(char *master_ifname, char *slave_ifname)
return 1;
}
- strncpy_IFNAMSIZ(ifr.ifr_name, master_ifname);
strncpy_IFNAMSIZ(ifr.ifr_slave, slave_ifname);
- if (ioctl(skfd, SIOCBONDRELEASE, &ifr) < 0
- && ioctl(skfd, BOND_RELEASE_OLD, &ifr) < 0
+ if (set_ifrname_and_do_ioctl(SIOCBONDRELEASE, &ifr, master_ifname) < 0
+ && ioctl_on_skfd(BOND_RELEASE_OLD, &ifr) < 0
) {
return 1;
}
}
/* set to default mtu */
- set_slave_mtu(slave_ifname, 1500);
+ set_mtu(slave_ifname, 1500);
return res;
}
{
int res;
- strncpy_IFNAMSIZ(dd->mtu.ifr_name, ifname);
- res = ioctl(skfd, SIOCGIFMTU, &dd->mtu);
- strncpy_IFNAMSIZ(dd->flags.ifr_name, ifname);
- res |= ioctl(skfd, SIOCGIFFLAGS, &dd->flags);
- strncpy_IFNAMSIZ(dd->hwaddr.ifr_name, ifname);
- res |= ioctl(skfd, SIOCGIFHWADDR, &dd->hwaddr);
+ res = set_ifrname_and_do_ioctl(SIOCGIFMTU, &dd->mtu, ifname);
+ res |= set_ifrname_and_do_ioctl(SIOCGIFFLAGS, &dd->flags, ifname);
+ res |= set_ifrname_and_do_ioctl(SIOCGIFHWADDR, &dd->hwaddr, ifname);
return res;
}
static int get_slave_flags(char *slave_ifname)
{
- strncpy_IFNAMSIZ(slave.flags.ifr_name, slave_ifname);
- return ioctl(skfd, SIOCGIFFLAGS, &slave.flags);
+ return set_ifrname_and_do_ioctl(SIOCGIFFLAGS, &slave.flags, slave_ifname);
}
-static int set_master_hwaddr(char *master_ifname, struct sockaddr *hwaddr)
+static int set_hwaddr(char *ifname, struct sockaddr *hwaddr)
{
struct ifreq ifr;
- strncpy_IFNAMSIZ(ifr.ifr_name, master_ifname);
- memcpy(&(ifr.ifr_hwaddr), hwaddr, sizeof(struct sockaddr));
- return ioctl(skfd, SIOCSIFHWADDR, &ifr);
+ memcpy(&(ifr.ifr_hwaddr), hwaddr, sizeof(*hwaddr));
+ return set_ifrname_and_do_ioctl(SIOCSIFHWADDR, &ifr, ifname);
}
-static int set_slave_hwaddr(char *slave_ifname, struct sockaddr *hwaddr)
-{
- struct ifreq ifr;
-
- strncpy_IFNAMSIZ(ifr.ifr_name, slave_ifname);
- memcpy(&(ifr.ifr_hwaddr), hwaddr, sizeof(struct sockaddr));
- return ioctl(skfd, SIOCSIFHWADDR, &ifr);
-}
-
-static int set_slave_mtu(char *slave_ifname, int mtu)
+static int set_mtu(char *ifname, int mtu)
{
struct ifreq ifr;
ifr.ifr_mtu = mtu;
- strncpy_IFNAMSIZ(ifr.ifr_name, slave_ifname);
- return ioctl(skfd, SIOCSIFMTU, &ifr);
+ return set_ifrname_and_do_ioctl(SIOCSIFMTU, &ifr, ifname);
}
-static int set_if_flags(char *ifname, short flags)
+static int set_if_flags(char *ifname, int flags)
{
struct ifreq ifr;
ifr.ifr_flags = flags;
- strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
- return ioctl(skfd, SIOCSIFFLAGS, &ifr);
+ return set_ifrname_and_do_ioctl(SIOCSIFFLAGS, &ifr, ifname);
}
-static int set_if_up(char *ifname, short flags)
+static int set_if_up(char *ifname, int flags)
{
int res = set_if_flags(ifname, flags | IFF_UP);
if (res)
return res;
}
-static int set_if_down(char *ifname, short flags)
+static int set_if_down(char *ifname, int flags)
{
int res = set_if_flags(ifname, flags & ~IFF_UP);
if (res)
{
struct ifreq ifr;
- strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
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);
+ return set_ifrname_and_do_ioctl(SIOCSIFADDR, &ifr, ifname);
}
static int set_if_addr(char *master_ifname, char *slave_ifname)
{
+#if (SIOCGIFADDR | SIOCSIFADDR \
+ | SIOCGIFDSTADDR | SIOCSIFDSTADDR \
+ | SIOCGIFBRDADDR | SIOCSIFBRDADDR \
+ | SIOCGIFNETMASK | SIOCSIFNETMASK) <= 0xffff
+#define INT uint16_t
+#else
+#define INT int
+#endif
static const struct {
- int g_ioctl;
- int s_ioctl;
+ INT g_ioctl;
+ INT s_ioctl;
} ifra[] = {
{ SIOCGIFADDR, SIOCSIFADDR },
{ SIOCGIFDSTADDR, SIOCSIFDSTADDR },
unsigned i;
for (i = 0; i < ARRAY_SIZE(ifra); i++) {
- strncpy_IFNAMSIZ(ifr.ifr_name, master_ifname);
- res = ioctl(skfd, ifra[i].g_ioctl, &ifr);
+ res = set_ifrname_and_do_ioctl(ifra[i].g_ioctl, &ifr, master_ifname);
if (res < 0) {
ifr.ifr_addr.sa_family = AF_INET;
memset(ifr.ifr_addr.sa_data, 0,
sizeof(ifr.ifr_addr.sa_data));
}
- strncpy_IFNAMSIZ(ifr.ifr_name, slave_ifname);
- res = ioctl(skfd, ifra[i].s_ioctl, &ifr);
+ res = set_ifrname_and_do_ioctl(ifra[i].s_ioctl, &ifr, slave_ifname);
if (res < 0)
return res;
}
projects / oweals / busybox.git / commitdiff