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hostapd: Check driver parameter before replacing previous value
This leaves the previously configured value in place if "SET driver ..." command fails. Signed-off-by: Jouni Malinen <j@w1.fi>
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@ -2055,20 +2055,21 @@ static int hostapd_config_fill(struct hostapd_config *conf,
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os_strlcpy(bss->wds_bridge, pos, sizeof(bss->wds_bridge));
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} else if (os_strcmp(buf, "driver") == 0) {
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int j;
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/* clear to get error below if setting is invalid */
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conf->driver = NULL;
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const struct wpa_driver_ops *driver = NULL;
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for (j = 0; wpa_drivers[j]; j++) {
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if (os_strcmp(pos, wpa_drivers[j]->name) == 0) {
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conf->driver = wpa_drivers[j];
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driver = wpa_drivers[j];
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break;
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}
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}
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if (conf->driver == NULL) {
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if (!driver) {
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wpa_printf(MSG_ERROR,
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"Line %d: invalid/unknown driver '%s'",
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line, pos);
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return 1;
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}
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conf->driver = driver;
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} else if (os_strcmp(buf, "driver_params") == 0) {
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os_free(conf->driver_params);
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conf->driver_params = os_strdup(pos);
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