SCM

5.12.1: Host Data, Network, Protocol, and Service Inquiries

Constant: af_inet

Constant: af_unix

Integer family codes for Internet and Unix sockets, respectively.

Function: gethost host-spec

Function: gethost

Returns a vector of information for the entry for HOST-SPEC or the next entry if HOST-SPEC isn't given. The information is:

1. host name string
2. list of host aliases strings
3. integer address type (AF_INET)
4. integer size of address entries (in bytes)
5. list of integer addresses

Function: sethostent stay-open

Function: sethostent

Rewinds the host entry table back to the begining if given an argument. If the argument stay-open is #f queries will be be done using UDP datagrams. Otherwise, a connected TCP socket will be used. When called without an argument, the host table is closed.

Function: getnet name-or-number

Function: getnet

Returns a vector of information for the entry for name-or-number or the next entry if an argument isn't given. The information is:

1. official network name string
2. list of network aliases strings
3. integer network address type (AF_INET)
4. integer network number

Function: setnetent stay-open

Function: setnetent

Rewinds the network entry table back to the begining if given an argument. If the argument stay-open is #f the table will be closed between calls to getnet. Otherwise, the table stays open. When called without an argument, the network table is closed.

Function: getproto name-or-number

Function: getproto

Returns a vector of information for the entry for name-or-number or the next entry if an argument isn't given. The information is:

1. official protocol name string
2. list of protocol aliases strings
3. integer protocol number

Function: setprotoent stay-open

Function: setprotoent

Rewinds the protocol entry table back to the begining if given an argument. If the argument stay-open is #f the table will be closed between calls to getproto. Otherwise, the table stays open. When called without an argument, the protocol table is closed.

Function: getserv name-or-port-number protocol

Function: getserv

Returns a vector of information for the entry for name-or-port-number and protocol or the next entry if arguments aren't given. The information is:

1. official service name string
2. list of service aliases strings
3. integer port number
4. protocol

Function: setservent stay-open

Function: setservent

Rewinds the service entry table back to the begining if given an argument. If the argument stay-open is #f the table will be closed between calls to getserv. Otherwise, the table stays open. When called without an argument, the service table is closed.