The netconfig file defines a list of ``transport names'', describing
their semantics and protocol. In FreeBSD, this file is only used by the
RPC library code.
Entries have the following format:
network_id semantics flags family protoname device libraries
Entries consist of the following fields:
network_id The name of the transport described.
semantics Describes the semantics of the transport. This can be one
tpi_clts Connectionless transport.
tpi_cots Connection-oriented transport
tpi_cots_ord Connection-oriented, ordered transport.
tpi_raw A raw connection.
flags This field is either blank (specified by ``-''), or contains
a ``v'', meaning visible to the getnetconfig(3) function.
family The protocol family of the transport. This is currently one
inet6 The IPv6 (PF_INET6) family of protocols.
inet The IPv4 (PF_INET) family of protocols.
loopback The PF_LOCAL protocol family.
protoname The name of the protocol used for this transport. Can cur-
rently be either udp, tcp or empty.
device This field is always empty in FreeBSD.
libraries This field is always empty in FreeBSD.
The order of entries in this file will determine which transport will be
preferred by the RPC library code, given a match on a specified network
type. For example, if a sample network config file would look like this:
udp6 tpi_clts v inet6 udp - -
tcp6 tpi_cots_ord v inet6 tcp - -
udp tpi_clts v inet udp - -
tcp tpi_cots_ord v inet tcp - -
rawip tpi_raw - inet - - -
char *nc_protofmly; /* Protocol family */
char *nc_proto; /* Protocol name */
char *nc_device; /* Network device pathname (unused) */
unsigned long nc_nlookups; /* Number of lookup libs (unused) */
char **nc_lookups; /* Names of the libraries (unused) */
unsigned long nc_unused; /* reserved */
BSD November 17, 2000 BSD
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