Chapter 14 Verifying IPv6 Installation

The following code fragment shows how an application can determine programmatically whether IPv6 is implemented on HP-UX. An application can check the existence of the /dev/ip6 device file at compile-time and/or run-time to determine whether IPv6 APIs and the IPv6 stack are on the system. If /dev/ip6 does not exist, an application continues to use IPv4 APIs.

if ((fd = open("dev/ip6", O_RDWR)) == -1)
        /* 
         * /dev/ip6 failed to open., Therefore  the IPv6 product
         *is not installed on the system. An application should use the
         * existing IPv4 code.
         */
  
     ...
 
else 
        /*  
         * dev/ip6 exists, so the IPv6 product is probably installed.
         * IPv6 APIs can handle both IPv4 and IPv6 traffic */




	NOTE: Starting with HP-UX 11i v2, IPv6 is automatically included in HP-UX.

Chapter 14 Verifying IPv6 Installation

Technical documentation

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