SRV(2) SRV(2)
NAME
srv - network name and address translation when hosted
SYNOPSIS
include "srv.m"
srv := load Srv Srv->PATH;
Srv: module
{
init: fn();
iph2a: fn(host: string): list of string;
ipa2h: fn(addr: string): list of string;
ipn2p: fn(protocol, service: string): string;
};
DESCRIPTION
Srv provides access to the host operating system's name and
address translation when Inferno is running hosted. The
module's implementation is usually built-in to emu(1), and
then only on some platforms. It uses the Internet name res-
olution services of the host operating system (eg,
gethostbyname on Unix systems). Its services are normally
only used internally by cs(8) and dns(8), and even they give
priority to data in services(6) and dns(6) if available.
Other Inferno applications normally give network addresses
to the functions of sys-dial(2), and they are then trans-
lated automatically, using the services of cs(8).
Init must be called before any other function is used.
Given a host name, iph2a returns a list of its Internet
addresses (if any). Given an Internet address, ipa2h
returns a list of host names (if any) that have that
address. The results are only as accurate as the host
system's name service.
Ipn2p returns the port number (as a string) for the given
service when accessed using a particular protocol protocol
(typically tcp or udp).
SOURCE
/emu/port/srv.c
SEE ALSO
sys-file2chan(2), cs(8), dns(8)
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