Consider the following factors for RAW sockets use:

• An application (for example, PING) can send and receive ICMPv6 messages.
• An application can send and receive datagrams with an IP protocol that the TCP/IP stack does not support.

The external behavior of IPv6 RAW sockets differs significantly from the external behavior of IPv4 RAW sockets, specifically with regards to the following items:

• RAW protocol values allowed
• Application visibility of IP headers
• ICMP considerations
• Checksum of data