Documentation/networking/phonet.txt

8 and RPC. With the Linux Phonet socket family, Linux host processes can
75 The Phonet socket address family maps the Phonet packet header:
92 Applications can send Phonet messages using the Phonet datagram socket
93 protocol from the PF_PHONET family. Each socket is bound to one of the
102   fd = socket(PF_PHONET, SOCK_DGRAM, 0);
118 A Phonet datagram socket can be subscribed to any number of 8-bits
125 control request, or when the socket is closed.
127 Note that no more than one socket can be subcribed to any given
136 socket paradigm. The listening socket is bound to an unique free object
137 ID. Each listening socket can handle up to 255 simultaneous
138 connections, one per accept()'d socket.
142   lfd = socket(PF_PHONET, SOCK_SEQPACKET, PN_PROTO_PIPE);
169   fd = socket(PF_PHONET, SOCK_SEQPACKET, PN_PROTO_PIPE);
181 When polling a connected pipe socket for writability, there is an
183 polling and the writing system calls. In this case, the socket will
188 The pipe protocol provides two socket options at the SOL_PNPIPE level:
192     PNPIPE_ENCAP_NONE: The socket operates normally (default).
194     PNPIPE_ENCAP_IP: The socket is used as a backend for a virtual IP
196       support on Nokia modems can use this. Note that the socket cannot
205     socket descriptors that are already connected or being connected.