m_ping.cpp

/*
    WASTE - m_ping.cpp (Ping message builder/parser class)
    Copyright (C) 2003 Nullsoft, Inc.

    WASTE 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.

    WASTE  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 with WASTE; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "platform.h"
#include "m_ping.h"

C_MessagePing::~C_MessagePing()
{
}

C_MessagePing::C_MessagePing()
{
  m_nick[0]=0;
  m_ip=0;
  m_port=0;
}

C_MessagePing::C_MessagePing(C_SHBuf *in)
{
  m_nick[0]=0;
  m_ip=0;
  m_port=0;

  unsigned char *data=(unsigned char*)in->Get();
  int l=in->GetLength();
  if (l < 2+4) return;
  m_port = data[0]|(data[1]<<8); data+=2;
  m_ip = data[0]|(data[1]<<8)|(data[2]<<16)|(data[3]<<24); data+=4;
  l-=4+2;
  if (l>0)
  {
    if (l > 32)
    {
      debug_printf("Ping: got ping with nick > 32\n");
    }
    else
    {
      memcpy(m_nick,data,l);
      data+=l;
      m_nick[l]=0;
    }
  }
}

C_SHBuf *C_MessagePing::Make(void)
{
  C_SHBuf *buf=new C_SHBuf(2+4+strlen(m_nick));
  unsigned char *data=(unsigned char *)buf->Get();
  data[0]=m_port&0xff; data[1]=(m_port>>8)&0xff; data+=2;
  data[0]=m_ip&0xff; data[1]=(m_ip>>8)&0xff; data[2]=(m_ip>>16)&0xff; data[3]=(m_ip>>24)&0xff; data+=4;  
  memcpy(data,m_nick,strlen(m_nick));
  data+=strlen(m_nick);
  return buf;
}