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Full Discussion: basic socket programming
Top Forums Programming basic socket programming Post 302332585 by Corona688 on Thursday 9th of July 2009 01:57:54 PM
Old 07-09-2009
You can't generally give more than one destination. You can broadcast, but that's done with a special address which makes it still just one address programming-wise.

Do you want stream sockets or packet ones? Stream sockets are used like files... write data on one side of the connection, read on the other, and vice versa. The internet uses TCP/IP for stream sockets.

Packet sockets send individual messages one at a time, in packets of a small maximum size. Each individual packet can have a different recipient, and each socket can receive from anyone. The internet uses UDP for this.
 

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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)
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