7190254: NetworkInterface getFlags implementation should support full integer...

7190254: NetworkInterface getFlags implementation should support full integer bit range for flags value
Reviewed-by: chegar
Contributed-by: NShirish Kuncolienkar <shirishk@linux.vnet.ibm.com>

src/solaris/native/java/net/NetworkInterface.c

@@ -147,7 +147,7 @@ static struct  sockaddr *getBroadcast(JNIEnv *env, int sock, const char *name, s
 static short   getSubnet(JNIEnv *env, int sock, const char *ifname);
 static int     getIndex(int sock, const char *ifname);
 
-static int     getFlags(int sock, const char *ifname);
+static int     getFlags(int sock, const char *ifname, int *flags);
 static int     getMacAddress(JNIEnv *env, int sock,  const char* ifname, const struct in_addr* addr, unsigned char *buf);
 static int     getMTU(JNIEnv *env, int sock, const char *ifname);
 
@@ -561,6 +561,7 @@ static int getFlags0(JNIEnv *env, jstring name) {
     jboolean isCopy;
     int ret, sock;
     const char* name_utf;
+    int flags = 0;
 
     name_utf = (*env)->GetStringUTFChars(env, name, &isCopy);
 
@@ -571,7 +572,7 @@ static int getFlags0(JNIEnv *env, jstring name) {
 
     name_utf = (*env)->GetStringUTFChars(env, name, &isCopy);
 
-    ret = getFlags(sock, name_utf);
+    ret = getFlags(sock, name_utf, &flags);
 
     close(sock);
     (*env)->ReleaseStringUTFChars(env, name, name_utf);
@@ -581,7 +582,7 @@ static int getFlags0(JNIEnv *env, jstring name) {
         return -1;
     }
 
-    return ret;
+    return flags;
 }
 
 
@@ -852,6 +853,7 @@ netif *addif(JNIEnv *env, int sock, const char * if_name, netif *ifs, struct soc
     int mask;
     int isVirtual = 0;
     int addr_size;
+    int flags = 0;
 
     /*
      * If the interface name is a logical interface then we
@@ -906,7 +908,7 @@ netif *addif(JNIEnv *env, int sock, const char * if_name, netif *ifs, struct soc
        * the 'parent' interface with the new records.
        */
         *name_colonP = 0;
-        if (getFlags(sock, name) < 0) {
+        if (getFlags(sock, name, &flags) < 0 || flags < 0) {
             // failed to access parent interface do not create parent.
             // We are a virtual interface with no parent.
             isVirtual = 1;
@@ -1278,9 +1280,8 @@ static int getMTU(JNIEnv *env, int sock,  const char *ifname) {
     return  if2.ifr_mtu;
 }
 
-static int getFlags(int sock, const char *ifname) {
+static int getFlags(int sock, const char *ifname, int *flags) {
   struct ifreq if2;
-  int ret = -1;
 
   memset((char *) &if2, 0, sizeof(if2));
   strcpy(if2.ifr_name, ifname);
@@ -1289,7 +1290,12 @@ static int getFlags(int sock, const char *ifname) {
       return -1;
   }
 
-  return if2.ifr_flags;
+  if (sizeof(if2.ifr_flags) == sizeof(short)) {
+      *flags = (if2.ifr_flags & 0xffff);
+  } else {
+      *flags = if2.ifr_flags;
+  }
+  return 0;
 }
 
 #endif
@@ -1663,7 +1669,7 @@ static int getMTU(JNIEnv *env, int sock,  const char *ifname) {
 }
 
 
-static int getFlags(int sock, const char *ifname) {
+static int getFlags(int sock, const char *ifname, int *flags) {
      struct   lifreq lifr;
      memset((caddr_t)&lifr, 0, sizeof(lifr));
      strcpy((caddr_t)&(lifr.lifr_name), ifname);
@@ -1672,7 +1678,8 @@ static int getFlags(int sock, const char *ifname) {
          return -1;
      }
 
-     return  lifr.lifr_flags;
+     *flags = lifr.lifr_flags;
+     return 0;
 }
 
 
@@ -1968,7 +1975,7 @@ static int getMTU(JNIEnv *env, int sock,  const char *ifname) {
     return  if2.ifr_mtu;
 }
 
-static int getFlags(int sock, const char *ifname) {
+static int getFlags(int sock, const char *ifname, int *flags) {
   struct ifreq if2;
   int ret = -1;
 
@@ -1979,7 +1986,12 @@ static int getFlags(int sock, const char *ifname) {
       return -1;
   }
 
-  return (((int) if2.ifr_flags) & 0xffff);
+  if (sizeof(if2.ifr_flags) == sizeof(short)) {
+    *flags = (if2.ifr_flags & 0xffff);
+  } else {
+    *flags = if2.ifr_flags;
+  }
+  return 0;
 }
 
 #endif