02-23-2010
Practically not possible , since with out configuring from IP address we cannot communicate to the outer world.Even if you want to communicate locally then you must use the localhost which is defaultly 127.0.0.1,
So there is no question of leaving from address empty.
and also there is some thing known as "kernel would fill the address " so you cannot escape from that,
Read more about socket programming
Network functions in C - Tutorial
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LEARN ABOUT HPUX
smfi_setconn
smfi_setconn(3N) smfi_setconn(3N)
NAME
smfi_setconn() - sets the socket for filter to communicate with sendmail
SYNOPSIS
PARAMETERS
oconn Specifies the address of the desired communication socket. The address must be a NULL-terminated string in the following format:
Specifies a named pipe.
Specifies an IPV4 socket, using either a
hostname or an ip-address.
Specifies an IPV6 socket, using either a
hostname or an ip-address..
DESCRIPTION
The routine sets the socket through which the filter must communicate with must be called only once before the function.
Notes
Filters must not be run as root when communicating over UNIX/local domain sockets.
The permissions for UNIX/local sockets must be set to 0600 (read/write permission only for the owner of the socket) or 0660 (read/write
permission for the owner and group of the socket). These permissions are useful when the RunAsUser option is used.
The permissions for a UNIX/local domain socket are determined using the the command, which must be set to 007 or 077.
Some operating systems, such as Solaris, do not use the permissions of the socket. Therefore, place the socket in a protected directory in
such systems.
RETURN VALUE
does not fail due to an invalid address. The failure can only be detected in the routine.
AUTHOR
was developed by the Sendmail Inc.
SEE ASLO
smfi_main(3N), smfi_register(3N), smfi_settimeout(3N), smfi_opensocket(3N), smfi_setbacklog(3N), smfi_setdbg(3N), smfi_stop(3N).
on
smfi_setconn(3N)