Read MAC address using ioctl if .mac.info file doesn't exist

Only some of kernel drivers write MAC to /opt/etc/.mac.info,
so add alternative way to get MAC using ioctl.

Signed-off-by: Kalle Lampila <kalle.lampila@ixonos.com>
Change-Id: I5824f10f20386be86106a61bce1f1fa7f141a432

diff --git a/src/utils/util.c b/src/utils/util.c
index bb468ab0e37ce6a6602cc945fc7f041e6d001d76..001cdb6f0c9010f88dbcf116193663f32f36b43f 100644 (file)
--- a/src/utils/util.c
+++ b/src/utils/util.c
@@ -21,6 +21,9 @@
 #include <string.h>
 #include <sys/wait.h>
 #include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <net/if.h>
 #include <vconf.h>
 #include <vconf-keys.h>
 #include <wifi-direct.h>
@@ -34,6 +37,7 @@
 
 #define WIFI_MAC_INFO_FILE     "/opt/etc/.mac.info"
 #define WIFI_MAC_INFO_LENGTH   17
+#define WIFI_DEV_NAME          "wlan0"
 
 GKeyFile *netconfig_keyfile_load(const char *pathname)
 {
@@ -392,40 +396,64 @@ void netconfig_del_wifi_found_notification(void)
 
 void netconfig_set_wifi_mac_address(void)
 {
-       FILE *fp;
+       FILE *fp = NULL;
+       struct ifreq ifr;
+       int ctl_sk = -1;
        char buf[WIFI_MAC_INFO_LENGTH + 1];
        char *mac_info;
 
        mac_info = vconf_get_str(VCONFKEY_WIFI_BSSID_ADDRESS);
        if (mac_info == NULL) {
                ERR("Failed to open vconf key %s", VCONFKEY_WIFI_BSSID_ADDRESS);
-               return;
        }
 
        INFO("%s : %s", VCONFKEY_WIFI_BSSID_ADDRESS, mac_info);
 
        fp = fopen(WIFI_MAC_INFO_FILE, "r");
-       if (fp == NULL) {
-               ERR("Failed to open file %s", WIFI_MAC_INFO_FILE);
-               g_free(mac_info);
-               return;
-       }
+       if (fp != NULL) {
+               if (fgets(buf, sizeof(buf), fp) == NULL) {
+                       ERR("Failed to get MAC info from %s", WIFI_MAC_INFO_FILE);
+                       goto done;
+               }
 
-       if (fgets(buf, sizeof(buf), fp) == NULL) {
-               ERR("Failed to get MAC info from %s", WIFI_MAC_INFO_FILE);
-               goto done;
-       }
+               INFO("%s : %s", WIFI_MAC_INFO_FILE, buf);
 
-       INFO("%s : %s", WIFI_MAC_INFO_FILE, buf);
+               if (strlen(buf) < WIFI_MAC_INFO_LENGTH) {
+                       ERR("Failed to get MAC info from %s", WIFI_MAC_INFO_FILE);
+                       goto done;
+               }
 
-       if (strlen(buf) < WIFI_MAC_INFO_LENGTH) {
-               ERR("Failed to get MAC info from %s", WIFI_MAC_INFO_FILE);
-               goto done;
-       }
+               buf[WIFI_MAC_INFO_LENGTH] = '\0';
+       } else {
+               // not MAC into file use ioctl to get MAC
+               ctl_sk = socket(PF_INET,SOCK_DGRAM,0);
+               if (ctl_sk < 0 ) {
+                       ERR("Failed to open socket");
+                       goto done;
+               }
 
-       buf[WIFI_MAC_INFO_LENGTH] = '\0';
+               memset(&ifr, 0, sizeof(struct ifreq));
+               strncpy(ifr.ifr_name, WIFI_DEV_NAME, sizeof(ifr.ifr_name) - 1);
+               ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = 0;
 
-       if (g_str_equal(mac_info, buf) == TRUE)
+               if (ioctl(ctl_sk, SIOCGIFHWADDR, &ifr) != 0) {
+                       ERR("Failed to SIOCGIFHWADDR ioctl");
+                       goto done;
+               }
+
+               snprintf(buf, WIFI_MAC_INFO_LENGTH + 1,
+                        "%02x:%02x:%02x:%02x:%02x:%02x",
+                        (unsigned char)ifr.ifr_hwaddr.sa_data[0],
+                        (unsigned char)ifr.ifr_hwaddr.sa_data[1],
+                        (unsigned char)ifr.ifr_hwaddr.sa_data[2],
+                        (unsigned char)ifr.ifr_hwaddr.sa_data[3],
+                        (unsigned char)ifr.ifr_hwaddr.sa_data[4],
+                        (unsigned char)ifr.ifr_hwaddr.sa_data[5]);
+
+               INFO("%s MAC address: %s", WIFI_DEV_NAME, buf);
+       }
+
+       if (mac_info && (g_str_equal(mac_info, buf) == TRUE))
                goto done;
 
        if (vconf_set_str(VCONFKEY_WIFI_BSSID_ADDRESS, buf) != 0)
@@ -433,5 +461,12 @@ void netconfig_set_wifi_mac_address(void)
 
 done:
        g_free(mac_info);
-       fclose(fp);
+
+       if (fp != NULL) {
+               fclose(fp);
+       }
+
+       if (ctl_sk >= 0) {
+               close(ctl_sk);
+       }
 }