Get info about a socket
Note: Many $functions have been deprecated in favor of Object Oriented
methods. The OO equivalent for $Sock_Info is the Info method.
$Sock_info retrieves socket information.
Syntax
%info = $Sock_Info(socket, infoType)
Syntax terms
| %info |
A string that contains the requested information. |
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| socket |
A string that is the socket identifier.
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| infoType |
One of the following string indicators of the information to be retrieved about the socket:
| Value |
Description |
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| CAPTURE |
Retrieve current print capture setting of socket (see $Sock_Capture). The socket need not be OPEN. |
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| REMOTE |
Retrieve dotted IP address of remote host, followed by blank and remote port number. The socket must be OPEN; if it is not, the string "RESET" is returned. |
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| STAT |
Retrieve socket state. The socket need not be OPEN. The returned value will be one of the following:
- CONN
- Socket
OPEN and enabled for sending in both directions
- FINR
- Socket
OPEN, remote stopped sending, local enabled for sending ("FIN received but not sent")
- FINS
- Socket
OPEN, local stopped sending, remote enabled for sending ("FIN sent but not received") - FINBOTH
- Socket
OPEN, local and remote stopped sending ("FIN sent and received")
- RESET
- Socket is
RESET (no longer connected)
Note: Since the status of OPEN sockets may include several more status types in future releases, test for OPEN sockets by testing for the string "RESET":
If $sock_info(%sk, 'STATUS') Ne 'RESET' ... |
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| opt |
Any of the strings that may be passed as the second argument to $Sock_Set (for example, CHAR or PRSTOK). For some of these, the socket must be OPEN; if not, the string "RESET" is returned. To view the arguments that require an OPEN socket, see $Sock_Set. |
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The $Sock_Info function returns either the requested value or, as noted above, the string "RESET".
If $Sock_Info is invoked with a socket that is RESET, the results depend on several factors:
- If argument two is ONRESET, the operation is performed normally, and there is no indication of the fact that the socket is RESET.
- Otherwise, if argument two is a keyword which does not require an
OPEN socket, and ONRESET CONTINUE, CANCELC, or LABELC is in effect for the socket, the string RESET is returned and the last error information is set.
- Otherwise, if ONRESET CONTINUE is in effect for the socket, the string
RESET is returned and the last error information is set.
- Otherwise the request is canceled or the
ONRESET label is jumped to, as explained in "Handling connection errors and RESET sockets". |
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