* Linux ioctl helper functions for driver wrappers
* Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
*/
#include "utils/includes.h"
int linux_set_iface_flags(int sock, const char *ifname, int dev_up)
{
struct ifreq ifr;
+ int ret;
if (sock < 0)
return -1;
os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
if (ioctl(sock, SIOCGIFFLAGS, &ifr) != 0) {
+ ret = errno ? -errno : -999;
wpa_printf(MSG_ERROR, "Could not read interface %s flags: %s",
ifname, strerror(errno));
- return -1;
+ return ret;
}
if (dev_up) {
}
if (ioctl(sock, SIOCSIFFLAGS, &ifr) != 0) {
- wpa_printf(MSG_ERROR, "Could not set interface %s flags: %s",
- ifname, strerror(errno));
- return -1;
+ ret = errno ? -errno : -999;
+ wpa_printf(MSG_ERROR, "Could not set interface %s flags (%s): "
+ "%s",
+ ifname, dev_up ? "UP" : "DOWN", strerror(errno));
+ return ret;
}
return 0;
}
+int linux_iface_up(int sock, const char *ifname)
+{
+ struct ifreq ifr;
+ int ret;
+
+ if (sock < 0)
+ return -1;
+
+ os_memset(&ifr, 0, sizeof(ifr));
+ os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
+
+ if (ioctl(sock, SIOCGIFFLAGS, &ifr) != 0) {
+ ret = errno ? -errno : -999;
+ wpa_printf(MSG_ERROR, "Could not read interface %s flags: %s",
+ ifname, strerror(errno));
+ return ret;
+ }
+
+ return !!(ifr.ifr_flags & IFF_UP);
+}
+
+
int linux_get_ifhwaddr(int sock, const char *ifname, u8 *addr)
{
struct ifreq ifr;
int linux_br_get(char *brname, const char *ifname)
{
char path[128], brlink[128], *pos;
+ ssize_t res;
+
os_snprintf(path, sizeof(path), "/sys/class/net/%s/brport/bridge",
ifname);
- os_memset(brlink, 0, sizeof(brlink));
- if (readlink(path, brlink, sizeof(brlink) - 1) < 0)
+ res = readlink(path, brlink, sizeof(brlink));
+ if (res < 0 || (size_t) res >= sizeof(brlink))
return -1;
+ brlink[res] = '\0';
pos = os_strrchr(brlink, '/');
if (pos == NULL)
return -1;
os_strlcpy(brname, pos, IFNAMSIZ);
return 0;
}
+
+
+int linux_master_get(char *master_ifname, const char *ifname)
+{
+ char buf[128], masterlink[128], *pos;
+ ssize_t res;
+
+ /* check whether there is a master */
+ os_snprintf(buf, sizeof(buf), "/sys/class/net/%s/master", ifname);
+
+ res = readlink(buf, masterlink, sizeof(masterlink));
+ if (res < 0 || (size_t) res >= sizeof(masterlink))
+ return -1;
+
+ masterlink[res] = '\0';
+
+ pos = os_strrchr(masterlink, '/');
+ if (pos == NULL)
+ return -1;
+ pos++;
+ os_strlcpy(master_ifname, pos, IFNAMSIZ);
+ return 0;
+}