Technical data

ip(7P) Protocols SunOS 5.5
ERRORS The following errors may occur when setting or getting IP options:
EINVAL An unknown socket option name was given.
EINVAL The IP option field was improperly formed; an option field was shorter
than the minimum value or longer than the option buffer provided.
NOTES Raw sockets should receive ICMP error packets relating to the protocol; currently such
packets are simply discarded.
Users of higher-level protocols such as TCP and UDP should be able to see receivedIP
options.
7P-148 modified 3 Jul 1990