Unix domain socket frame structure

Question

How does a unix domain socket packet look like? Is it like a TCP/IP packet which have an ethernet header, an IP header and a TCP header? How do they look like in unix domain socket?

Answer 1

Unix domain sockets are not transmitted over the wire, they only exist inside the one machine. So they don't have a packet header in that sense.

AFAIK stream oriented unix domain sockets (SOCK_STREAM) are not even broken into packets as such. Message oriented sockets (SOCK_DGRAM) may have a data structure associated with each message although this will be entirely internal to the Kernel.