Closed PR #3 Fixed a potential stack overflow

src/net_utils.c

@@ -128,10 +128,8 @@ int get_ip_of_host(const char *host_name, int af, char *IP)
  *
  * in:   if_name - network interface name in a string format of such "eth0"
  *       af      - valid address types are AF_INET and AF_INET6
-         addr    - a pointer to the structure of the address,
- *                 which will be copied to the host address.
- *                 This format is an IP address is necessary
- *                 in functions such as connect()
+ *       addr    - a pointer to the structure of the in_addr or in6_addr,
+ *                 which the host address will be copied to.
  *
  * ret:  0 - success
  *      -1 - failure (see errno)
@@ -180,12 +178,12 @@ int get_addr_of_if(const char *if_name, int af, void *addr)
 
         if( af == AF_INET6)
         {
-            addr_len = sizeof(struct sockaddr_in6);
+            addr_len = sizeof(struct in6_addr);
             src      = &(((struct sockaddr_in6 *)ifa_cur->ifa_addr)->sin6_addr);
         }
         else
         {
-            addr_len = sizeof(struct sockaddr_in);
+            addr_len = sizeof(struct in_addr);
             src      = &(((struct sockaddr_in *)ifa_cur->ifa_addr)->sin_addr);
         }