netconfig(5) - NetBSD Manual Pages

NETCONFIG(5)              NetBSD Programmer's Manual              NETCONFIG(5)


NAME
netconfig - network configuration data base
SYNOPSIS
/etc/netconfig
DESCRIPTION
The netconfig file defines a list of ``transport names'', describing their semantics and protocol. In NetBSD, this file is only used by the RPC library code. 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 of: 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 (``-''), or contains a ``v'', meaning visible to the getnetconfig(3) function. protofamily The protocol family of the transport. This is currently one of: 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 currently be either udp, tcp or empty. device This field is always empty in NetBSD. nametoaddr_libs This field is always empty in NetBSD. 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 - - - local tpi_cots_ord - loopback - - - then using the network type udp in calls to the RPC library function (see rpc(3) ) will make the code first try udp6, and then udp. getnetconfig(3) and associated functions will parse this file and return structures of the following format: struct netconfig { char *nc_netid; /* Network ID */ unsigned long nc_semantics; /* Semantics (see below) */ unsigned long nc_flag; /* Flags (see below) */ 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[9]; /* reserved */ };
SEE ALSO
getnetconfig(3), getnetpath(3)
FILES
/etc/netconfig June 2, 2000 2

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