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nl80211: Stop more quickly on initialization errors

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Stop on fatal errors like an attempt to use a non-existing interface or
not have root privileges to avoid producing confusing error messages.
This commit is contained in:
Jouni Malinen 2011-10-20 21:36:36 +03:00 committed by Jouni Malinen
parent 8c0d3b4fc6
commit 6e8183d714
2 changed files with 18 additions and 8 deletions
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19
src/drivers/driver_nl80211.c
View File

@ -2340,8 +2340,9 @@ wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
if ((drv->global == NULL || if ((drv->global == NULL ||
drv->ifindex != drv->global->if_add_ifindex) && drv->ifindex != drv->global->if_add_ifindex) &&
wpa_driver_nl80211_set_mode(bss, NL80211_IFTYPE_STATION) < 0) { wpa_driver_nl80211_set_mode(bss, NL80211_IFTYPE_STATION) < 0) {
wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to " wpa_printf(MSG_ERROR, "nl80211: Could not configure driver to "
"use managed mode"); "use managed mode");
return -1;
} }
if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) { if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
@ -5711,15 +5712,21 @@ static int wpa_driver_nl80211_set_mode(struct i802_bss *bss,
wpa_printf(MSG_DEBUG, "nl80211: Try mode change after setting " wpa_printf(MSG_DEBUG, "nl80211: Try mode change after setting "
"interface down"); "interface down");
for (i = 0; i < 10; i++) { for (i = 0; i < 10; i++) {
if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) == int res;
0) { res = linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
if (res == -EACCES || res == -ENODEV)
break;
if (res == 0) {
/* Try to set the mode again while the interface is /* Try to set the mode again while the interface is
* down */ * down */
ret = nl80211_set_mode(drv, drv->ifindex, nlmode); ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, if (ret == -EACCES)
1)) break;
res = linux_set_iface_flags(drv->ioctl_sock,
bss->ifname, 1);
if (res && !ret)
ret = -1; ret = -1;
if (!ret) else if (ret != -EBUSY)
break; break;
} else } else
wpa_printf(MSG_DEBUG, "nl80211: Failed to set " wpa_printf(MSG_DEBUG, "nl80211: Failed to set "

7
src/drivers/linux_ioctl.c
View File

@ -24,6 +24,7 @@
int linux_set_iface_flags(int sock, const char *ifname, int dev_up) int linux_set_iface_flags(int sock, const char *ifname, int dev_up)
{ {
struct ifreq ifr; struct ifreq ifr;
int ret;
if (sock < 0) if (sock < 0)
return -1; return -1;
@ -32,9 +33,10 @@ int linux_set_iface_flags(int sock, const char *ifname, int dev_up)
os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ); os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
if (ioctl(sock, SIOCGIFFLAGS, &ifr) != 0) { if (ioctl(sock, SIOCGIFFLAGS, &ifr) != 0) {
ret = errno ? -errno : -999;
wpa_printf(MSG_ERROR, "Could not read interface %s flags: %s", wpa_printf(MSG_ERROR, "Could not read interface %s flags: %s",
ifname, strerror(errno)); ifname, strerror(errno));
return -1; return ret;
} }
if (dev_up) { if (dev_up) {
@ -48,9 +50,10 @@ int linux_set_iface_flags(int sock, const char *ifname, int dev_up)
} }
if (ioctl(sock, SIOCSIFFLAGS, &ifr) != 0) { if (ioctl(sock, SIOCSIFFLAGS, &ifr) != 0) {
ret = errno ? -errno : -999;
wpa_printf(MSG_ERROR, "Could not set interface %s flags: %s", wpa_printf(MSG_ERROR, "Could not set interface %s flags: %s",
ifname, strerror(errno)); ifname, strerror(errno));
return -1; return ret;
} }
return 0; return 0;