private void ev_echo_reply(easy_socket.icmp.icmp_echo_reply sender, easy_socket.icmp.EventArgs_ipv4header_ReceiveData e)
{
int old_time = (int)((sender.identifier << 16) + sender.sequence_number);
// if echo reply was not one of our
if (!this.check_identifier(old_time))
{
return;
}
// else comput time needed
int time = System.Environment.TickCount;
time -= old_time;
if (time == 0)
{
time = 1;
}
this.textBox_telnet_add(e.ipv4header.SourceAddress + " reply in time<" +
time.ToString() + " ms\r\n");
// in case of broadcast wait time out before sending another ping
// else
if (!this.checkBox_may_broadcast.Checked)
{
this.icmp_server.clear_wait_timeout();
this.send_if_necessary();// send echo
}
}
private void ev_echo_reply(easy_socket.icmp.icmp_echo_reply sender, easy_socket.icmp.EventArgs_ipv4header_ReceiveData e)
{
int old_time = (int)((sender.identifier << 16) + sender.sequence_number);
// if echo reply was not one of our
if (!this.check_identifier(old_time))
{
return;
}
this.icmp_server.clear_wait_timeout();
// else comput time needed
int time = System.Environment.TickCount;
time -= old_time;
if (time == 0)
{
time = 1;
}
this.textBox_telnet_add(e.ipv4header.SourceAddress + " reply in time<" +
time.ToString() + " ms\r\n");
if (this.checkBox_icmp_resolve_adresses.Checked)
{
this.dns_resolve(e.ipv4header.SourceAddress);
}
// we stop trace is finished
this.allow_user_interface(true);
this.icmp_server.stop();
}
private void ev_source_quench(easy_socket.icmp.icmp_source_quench sender, easy_socket.icmp.EventArgs_ipv4header_ReceiveData e)
{
if (!this.check_if_one_of_our_packets(sender.ih_and_original_dd))
{
return;
}
this.textBox_telnet_add("Icmp source quench message from: " +
e.ipv4header.SourceAddress + "\r\n");
// we stop
this.allow_user_interface(true);
this.icmp_server.stop();
}
private void ev_source_quench(easy_socket.icmp.icmp_source_quench sender, easy_socket.icmp.EventArgs_ipv4header_ReceiveData e)
{
if (!this.check_if_one_of_our_packets(sender.ih_and_original_dd))
{
return;
}
this.textBox_telnet_add("Icmp source quench message from: " +
e.ipv4header.SourceAddress + "\r\n");
// in case of broadcast wait time out before sending another ping
if (!this.checkBox_may_broadcast.Checked)
{
this.send_if_necessary();
}
}
private void ev_destination_unreachable(easy_socket.icmp.icmp_destination_unreachable sender, easy_socket.icmp.EventArgs_ipv4header_ReceiveData e)
{
if (!this.check_if_one_of_our_packets(sender.ih_and_original_dd))
{
return;
}
easy_socket.ip_header.ipv4_header initial_iph = new easy_socket.ip_header.ipv4_header();
initial_iph.decode(sender.ih_and_original_dd);// may return the error error_datagram_not_complete but decode at least ip header
this.textBox_telnet_add("Icmp destination unreachable from: " +
e.ipv4header.SourceAddress +
" for destination: " + initial_iph.DestinationAddress + "\r\n");
// in case of broadcast wait time out before sending another ping
if (!this.checkBox_may_broadcast.Checked)
{
this.send_if_necessary();
}
}
private void ev_time_exceeded(easy_socket.icmp.icmp_time_exceeded_message sender, easy_socket.icmp.EventArgs_ipv4header_ReceiveData e)
{
if (!this.check_if_one_of_our_packets(sender.ih_and_original_dd))
{
return;
}
easy_socket.ip_header.ipv4_header initial_iph = new easy_socket.ip_header.ipv4_header();
initial_iph.decode(sender.ih_and_original_dd);// may return the error error_datagram_not_complete but try to decode at least ip header
this.textBox_telnet_add("Icmp time exceeded message from: " + e.ipv4header.SourceAddress + " for ip: " +
initial_iph.DestinationAddress +
" (packet ttl: " +
initial_iph.time_to_live.ToString()
+ ")\r\n");
// in case of broadcast wait time out before sending another ping
if (!this.checkBox_may_broadcast.Checked)
{
this.send_if_necessary();
}
}
private void ev_destination_unreachable(easy_socket.icmp.icmp_destination_unreachable sender, easy_socket.icmp.EventArgs_ipv4header_ReceiveData e)
{
if (!this.check_if_one_of_our_packets(sender.ih_and_original_dd))
{
return;
}
easy_socket.ip_header.ipv4_header initial_iph = new easy_socket.ip_header.ipv4_header();
initial_iph.decode(sender.ih_and_original_dd);// may return the error error_datagram_not_complete but decode at least ip header
this.textBox_telnet_add("Icmp destination unreachable from: " +
e.ipv4header.SourceAddress +
" for destination: " + initial_iph.DestinationAddress + "\r\n");
// we stop
this.allow_user_interface(true);
this.icmp_server.stop();
}
private void ev_time_exceeded(easy_socket.icmp.icmp_time_exceeded_message sender, easy_socket.icmp.EventArgs_ipv4header_ReceiveData e)
{
if (!this.check_if_one_of_our_packets(sender.ih_and_original_dd))
{
return;
}
this.icmp_server.clear_wait_timeout();
easy_socket.ip_header.ipv4_header initial_iph = new easy_socket.ip_header.ipv4_header();
initial_iph.decode(sender.ih_and_original_dd);// may return the error error_datagram_not_complete but try to decode at least ip header
this.textBox_telnet_add("Icmp time exceeded message from: " + e.ipv4header.SourceAddress + " for ip: " +
initial_iph.DestinationAddress +
" (packet ttl: " +
initial_iph.time_to_live.ToString()
+ ")\r\n");
this.textBox_telnet_add("Initial TTL:" + (this.b_current_hop - 1) + "\r\n");//this.b_current_hop has already been increased
if (this.checkBox_icmp_resolve_adresses.Checked)
{
this.dns_resolve(e.ipv4header.SourceAddress);
}
this.send_if_necessary();
}
