linkchannel.cc

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/*
 * This file is part of plptools.
 *
 *  Copyright (C) 1999 Philip Proudman <philip.proudman@btinternet.com>
 *  Copyright (C) 1999-2001 Fritz Elfert <felfert@to.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  along with this program; if not, see <https://www.gnu.org/licenses/>.
 *
 */
#include "config.h"
 
#include <iomanip>
#include <string>
#include <cstring>
 
#include "bufferstore.h"
#include "bufferarray.h"
 
#include "linkchannel.h"
#include "ncp_log.h"
#include "ncp.h"
 
using namespace std;
 
LinkChannel::LinkChannel(NCP* _ncpController, int _ncpChannel)
: Channel(_ncpController) {
    registerSer = 0x1234;
    if (_ncpChannel != -1) {
        setNcpChannel(_ncpChannel);
    }
    ncpConnect();
}
 
void LinkChannel::ncpDataCallback(BufferStore & a) {
    int len = a.getLen();
    if (verbose & LINKCHAN_DEBUG_LOG) {
        lout << "linkchan: << msg ";
        if (verbose & LINKCHAN_DEBUG_DUMP)
            lout << a << endl;
        else
            lout << len << endl;
    }
 
    if ((len >= 5) && (a.getByte(0) == 1)) {
        char srvName[20];
        unsigned int ser = a.getWord(1);
        int res = a.getWord(3);
        // int dontknow = a.getWord(5);
        BufferArray newStack;
        BufferStore se;
 
 
        strncpy(srvName, a.getString(7), 17);
        if (verbose & LINKCHAN_DEBUG_LOG)
            lout << "linkchan: received registerAck: ser=0x" << hex << setw(4)
                 << setfill('0') << ser << " res=" << res << " srvName=\""
                 << srvName << "\"" << endl;
 
        while (!registerStack.empty()) {
            se = registerStack.pop();
            if (se.getWord(0) == ser) {
                if (verbose & LINKCHAN_DEBUG_LOG)
                    lout << "linkchan: found ser=0x" << hex << setw(4) <<
                        setfill('0') << se.getWord(0) <<
                        " on stack -> callBack to waiting chan" << endl;
                if (strlen(srvName) < 4)
                    strcat(srvName, ".*");
                ncpDoRegisterAck((int)se.getWord(2), srvName);
            } else
                newStack += se;
        }
        registerStack = newStack;
        return;
    }
    lerr << "linkchan: unknown message " << a.getByte(0) << endl;
}
 
const char *LinkChannel::getNcpRegisterName() {
    return "LINK";
}
 
void LinkChannel::ncpConnectAck() {
    if (verbose & LINKCHAN_DEBUG_LOG)
        lout << "linkchan: << cack" << endl;
}
 
void LinkChannel::ncpConnectTerminate() {
    if (verbose & LINKCHAN_DEBUG_LOG)
        lout << "linkchan: << ctrm" << endl;
    terminateWhenAsked();
}
 
void LinkChannel::ncpConnectNak() {
    ncpConnectTerminate();
}
 
void LinkChannel::Register(Channel *ch) {
    BufferStore a;
    BufferStore stack;
 
    stack.addWord(registerSer);
    stack.addWord(ch->getNcpChannel());
    registerStack += stack;
    a.addByte(0);
    a.addWord(registerSer++);
    a.addString(ch->getNcpRegisterName());
    a.addByte(0);
    ncpSend(a);
}