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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* This contains an implementation of the Direct Client-to-Client (DCC)
* protocol.
* A description of the DCC protocol
* http://www.irchelp.org/irchelp/rfc/dccspec.html
*/
import { ircHandlerPriorities } from "resource:///modules/ircHandlerPriorities.sys.mjs";
// Parse a CTCP message into a DCC message. A DCC message is a CTCP message of
// the form:
// DCC <type> <argument> <address> <port> [<size>]
function DCCMessage(aMessage, aAccount) {
let message = aMessage;
let params = message.ctcp.param.split(" ");
if (params.length < 4) {
aAccount.ERROR("Not enough DCC parameters:\n" + JSON.stringify(aMessage));
return null;
}
try {
// Address, port and size should be treated as unsigned long, unsigned short
// and unsigned long, respectively. The protocol is designed to handle
// further arguments, if necessary.
message.ctcp.dcc = {
type: params[0],
argument: params[1],
address: Number(params[2]),
port: Number(params[3]),
size: params.length == 5 ? Number(params[4]) : null,
furtherArguments: params.length > 5 ? params.slice(5) : [],
};
} catch (e) {
aAccount.ERROR(
"Error parsing DCC parameters:\n" + JSON.stringify(aMessage)
);
return null;
}
return message;
}
// This is the DCC handler for CTCP, it will call each DCC handler.
export var ctcpDCC = {
name: "DCC",
// Slightly above default CTCP priority.
priority: ircHandlerPriorities.HIGH_PRIORITY + 10,
isEnabled: () => true,
commands: {
// Handle a DCC message by parsing the message and executing any handlers.
DCC(message, ircHandlers) {
// If there are no DCC handlers, then don't parse the DCC message.
if (!ircHandlers.hasDCCHandlers) {
return false;
}
// Parse the message and attempt to handle it.
return ircHandlers.handleDCCMessage(this, DCCMessage(message, this));
},
},
};
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