From 0e5ec067f7d26341f14132687d21628de1fd4097 Mon Sep 17 00:00:00 2001
From: Purushottam Kushwaha <pkushwah@codeaurora.org>
Date: Fri, 21 Jul 2017 22:11:45 +0530
Subject: [PATCH] qsap: Add API to get device mac address based on interface
 name.

This adds new API linux_get_ifhwaddr() which can be used to get
mac address of input interface. IOCTL SIOCGIFHWADDR is used to get
the interface address.

CRs-Fixed: 2080924
Change-Id: I1b825fb2c1f35280d2d57928be4f87d23d78decb
---
 softap/sdk/qsap_api.c | 28 ++++++++++++++++++++++++++++
 softap/sdk/qsap_api.h |  1 +
 2 files changed, 29 insertions(+)

diff --git a/softap/sdk/qsap_api.c b/softap/sdk/qsap_api.c
index 5dfbd44..9c3599f 100755
--- a/softap/sdk/qsap_api.c
+++ b/softap/sdk/qsap_api.c
@@ -45,6 +45,7 @@
 #include <unistd.h>
 #include <private/android_filesystem_config.h>
 #include <net/if.h>
+#include <net/if_arp.h>
 #include <netlink/netlink.h>
 #include <netlink/genl/genl.h>
 #include <netlink/genl/family.h>
@@ -3469,6 +3470,33 @@ int qsap_control_bridge(int argc, char ** argv)
 }
 
 
+int linux_get_ifhwaddr(const char *ifname, char *addr)
+{
+    struct ifreq ifr;
+    int sock = socket(AF_INET, SOCK_DGRAM, 0);
+
+#ifndef MAC2STR
+#define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
+#define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
+#endif
+    memset(&ifr, 0, sizeof(ifr));
+    strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
+    if (ioctl(sock, SIOCGIFHWADDR, &ifr)) {
+        ALOGE("Could not get interface %s hwaddr: %s", ifname, strerror(errno));
+        return -1;
+    }
+
+    if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
+        ALOGE("%s: Invalid HW-addr family 0x%04x", ifname, ifr.ifr_hwaddr.sa_family);
+        return -1;
+    }
+    memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
+    ALOGE("%s: " MACSTR, ifname, MAC2STR(addr));
+
+    return 0;
+}
+
+
 int qsap_add_or_remove_interface(const char *newIface , int createIface)
 {
     const char *wlanIface = "wlan0";
diff --git a/softap/sdk/qsap_api.h b/softap/sdk/qsap_api.h
index 3020fc7..5d841e7 100755
--- a/softap/sdk/qsap_api.h
+++ b/softap/sdk/qsap_api.h
@@ -618,6 +618,7 @@ int qsap_prepare_softap(void);
 int qsap_unprepare_softap(void);
 int qsap_is_fst_enabled(void);
 int qsap_control_bridge(int argc, char ** argv);
+int linux_get_ifhwaddr(const char *ifname, char *addr);
 
 #if __cplusplus
 };  // extern "C"