protected bool check_if_one_of_our_packets(byte[] data)
{
easy_socket.ip_header.ipv4_header iph = new easy_socket.ip_header.ipv4_header();
/*
* error_success=0;
* error_datagram_null=1;
* error_datagram_internet_header_length_too_small=2;
* error_datagram_total_length_too_small=3;
* error_datagram_not_complete=4;
*/
byte b = iph.decode(data);
if ((b == easy_socket.ip_header.ipv4_header.error_datagram_null) ||
(b == easy_socket.ip_header.ipv4_header.error_datagram_internet_header_length_too_small) ||
(b == easy_socket.ip_header.ipv4_header.error_datagram_total_length_too_small))
{
return(false);
}
if (iph.protocol != easy_socket.ip_header.ipv4_header.protocol_icmp)
{
return(false);
}
// error_success || error_datagram_not_complete
if (iph.data == null)
{
return(false);
}
if (iph.data.Length < 8) // 8=icmp_echo header size
{
return(false);
}
if (iph.data[0] != 8) // it's not a reply to an echo msg
{
return(false);
}
easy_socket.icmp.icmp_echo ie = new easy_socket.icmp.icmp_echo();
ie.decode(iph.data);
int id = (ie.identifier << 16) + ie.sequence_number;
return(this.check_identifier(id));
}
public FormPing(string host, string delay, string ttl, string nb_ping, string delay_between_ping_sending, bool looping, bool b_may_multiple_replies)
{
InitializeComponent();
Tools.GUI.XPStyle.MakeXPStyle(this);
this.textBox_icmp_ip.Text = host;
this.textBox_icmp_delay_dor_reply.Text = delay;
this.textBox_icmp_packet_ttl.Text = ttl;
this.textBox_icmp_ping_number.Text = nb_ping;
this.textBox_icmp_delay_between_ping_sending.Text = delay_between_ping_sending;
this.checkBox_icmp_looping_ping.Checked = looping;
this.checkBox_may_broadcast.Checked = b_may_multiple_replies;
this.textBox_icmp_ping_number.Enabled = !this.checkBox_icmp_looping_ping.Checked;
al = new System.Collections.ArrayList(9);
// create echo
this.icmp_echo = new easy_socket.icmp.icmp_echo();
// create echo server
this.icmp_server = new easy_socket.icmp.icmp_server();
// add events
this.add_events();
}
/// <summary>
/// used to get original datagram info on icmp troubles msg. the icmp msg should contain internet header and 64 bits of original datagram
/// </summary>
/// <param name="raw_databool"></param>
/// <param name="b_most_important_info_only"></param>
/// <returns></returns>
private static string decode_internet_header_and_64_bits_of_original_datagram(byte[] raw_data, bool b_most_important_info_only)
{
if (raw_data == null)
{
return("");
}
string ret = "";
byte ret_decode;
// decode
easy_socket.ip_header.ipv4_header ipv4h = new easy_socket.ip_header.ipv4_header();
ret_decode = ipv4h.decode(raw_data);
if ((ret_decode != easy_socket.ip_header.ipv4_header.error_success) && (ret_decode != easy_socket.ip_header.ipv4_header.error_datagram_not_complete) && (ret_decode != easy_socket.ip_header.ipv4_header.error_datagram_length_not_matching))
{
return(easy_socket.hexa_convert.byte_to_hexa(raw_data));
}
string[] data = null;
// case of no data in original datagram
if (ipv4h.data == null)
{
data = packet_ToStringArray.ip_raw(ref ipv4h, b_most_important_info_only);
}
else if (ipv4h.data.Length < 1)
{
data = packet_ToStringArray.ip_raw(ref ipv4h, b_most_important_info_only);
}
// assume there's data in original ip datagram
else// data !=null && length>1
{
switch (ipv4h.protocol)
{
// if icmp protocol
case easy_socket.ip_header.ipv4_header.protocol_icmp:
switch (ipv4h.data[0])// switch type (see icmp protocol)
{
case easy_socket.icmp.icmp.EchoReply:
easy_socket.icmp.icmp_echo_reply icmper = new easy_socket.icmp.icmp_echo_reply();
if (icmper.decode(ipv4h.data) == easy_socket.icmp.icmp.error_success)
{
data = packet_ToStringArray.icmp_echo_reply(ref ipv4h, ref icmper, b_most_important_info_only);
}
break;
case easy_socket.icmp.icmp.DestinationUnreachable:
easy_socket.icmp.icmp_destination_unreachable icmpdu = new easy_socket.icmp.icmp_destination_unreachable();
if (icmpdu.decode(ipv4h.data) == easy_socket.icmp.icmp.error_success)
{
data = packet_ToStringArray.icmp_destination_unreachable(ref ipv4h, ref icmpdu, b_most_important_info_only);
}
break;
case easy_socket.icmp.icmp.SourceQuench:
easy_socket.icmp.icmp_source_quench icmpsq = new easy_socket.icmp.icmp_source_quench();
if (icmpsq.decode(ipv4h.data) == easy_socket.icmp.icmp.error_success)
{
data = packet_ToStringArray.icmp_source_quench(ref ipv4h, ref icmpsq, b_most_important_info_only);
}
break;
case easy_socket.icmp.icmp.Redirect:
easy_socket.icmp.icmp_redirect icmpr = new easy_socket.icmp.icmp_redirect();
if (icmpr.decode(ipv4h.data) == easy_socket.icmp.icmp.error_success)
{
data = packet_ToStringArray.icmp_redirect(ref ipv4h, ref icmpr, b_most_important_info_only);
}
break;
case easy_socket.icmp.icmp.Echo:
easy_socket.icmp.icmp_echo icmpe = new easy_socket.icmp.icmp_echo();
if (icmpe.decode(ipv4h.data) == easy_socket.icmp.icmp.error_success)
{
data = packet_ToStringArray.icmp_echo(ref ipv4h, ref icmpe, b_most_important_info_only);
}
break;
case easy_socket.icmp.icmp.TimeExceeded:
easy_socket.icmp.icmp_time_exceeded_message icmptem = new easy_socket.icmp.icmp_time_exceeded_message();
if (icmptem.decode(ipv4h.data) == easy_socket.icmp.icmp.error_success)
{
data = packet_ToStringArray.icmp_time_exceeded_message(ref ipv4h, ref icmptem, b_most_important_info_only);
}
break;
case easy_socket.icmp.icmp.ParameterProblem:
easy_socket.icmp.icmp_parameter_problem icmppp = new easy_socket.icmp.icmp_parameter_problem();
if (icmppp.decode(ipv4h.data) == easy_socket.icmp.icmp.error_success)
{
data = packet_ToStringArray.icmp_parameter_problem(ref ipv4h, ref icmppp, b_most_important_info_only);
}
break;
case easy_socket.icmp.icmp.Timestamp:
easy_socket.icmp.icmp_timestamp icmpt = new easy_socket.icmp.icmp_timestamp();
if (icmpt.decode(ipv4h.data) == easy_socket.icmp.icmp.error_success)
{
data = packet_ToStringArray.icmp_timestamp(ref ipv4h, ref icmpt, b_most_important_info_only);
}
break;
case easy_socket.icmp.icmp.TimestampReply:
easy_socket.icmp.icmp_timestamp_reply icmptr = new easy_socket.icmp.icmp_timestamp_reply();
if (icmptr.decode(ipv4h.data) == easy_socket.icmp.icmp.error_success)
{
data = packet_ToStringArray.icmp_timestamp_reply(ref ipv4h, ref icmptr, b_most_important_info_only);
}
break;
case easy_socket.icmp.icmp.InformationRequest:
easy_socket.icmp.icmp_information_request icmpirequest = new easy_socket.icmp.icmp_information_request();
if (icmpirequest.decode(ipv4h.data) == easy_socket.icmp.icmp.error_success)
{
data = packet_ToStringArray.icmp_information_request(ref ipv4h, ref icmpirequest, b_most_important_info_only);
}
break;
case easy_socket.icmp.icmp.InformationReply:
easy_socket.icmp.icmp_information_reply icmpireply = new easy_socket.icmp.icmp_information_reply();
if (icmpireply.decode(ipv4h.data) == easy_socket.icmp.icmp.error_success)
{
data = packet_ToStringArray.icmp_information_reply(ref ipv4h, ref icmpireply, b_most_important_info_only);
}
break;
//default:
}// end of icmp switch
break;
// if udp protocol
case easy_socket.ip_header.ipv4_header.protocol_udp:
easy_socket.udp_header.udp_header udph = new easy_socket.udp_header.udp_header();
udph.decode(ipv4h.source_address, ipv4h.destination_address, ipv4h.data, false); // don't check checksum
data = packet_ToStringArray.udp(ref ipv4h, ref udph, false); // show max info of original packet
break;
// if tcp protocol
case easy_socket.ip_header.ipv4_header.protocol_tcp:
easy_socket.tcp_header.tcp_header tcph = new easy_socket.tcp_header.tcp_header();
tcph.decode(ipv4h.source_address, ipv4h.destination_address, ipv4h.data, false); // don't check checksum
data = packet_ToStringArray.tcp(ref ipv4h, ref tcph, b_most_important_info_only); // show max info of original packet
break;
// other protocol
default:
data = packet_ToStringArray.ip_raw(ref ipv4h, b_most_important_info_only);
break;
} // end of protocol switch
} // end of ip data test
// Join data (string[]) to a string
if (data != null)
{
ret = System.String.Join(" ", data);
}
return(ret);
}
/// <summary>
///
/// </summary>
/// <param name="ipv4h"></param>
/// <param name="icmp"></param>
/// <param name="b_most_important_info_only"></param>
/// <returns>ip info-ip data(length=4),"","",info,data</returns>
public static string[] icmp_echo(ref easy_socket.ip_header.ipv4_header ipv4h, ref easy_socket.icmp.icmp_echo icmp, bool b_most_important_info_only)
{
string str_global_info;
str_global_info = "Echo";
if (!b_most_important_info_only)
{
str_global_info += ", Type:" + icmp.Type;
str_global_info += ", Code:" + icmp.code;
str_global_info += ", Checksum:" + icmp.Checksum;
}
str_global_info += ", Identifier:" + icmp.Identifier;
str_global_info += ", SeqNum:" + icmp.SequenceNumber;
string[] ret = new string[4 + 4];
System.Array.Copy(packet_ToStringArray.ip_raw(ref ipv4h, b_most_important_info_only), 0, ret, 0, 4);
ret[4] = "";
ret[5] = "";
ret[6] = str_global_info;
ret[7] = easy_socket.hexa_convert.byte_to_hexa(icmp.data);
return(ret);
}
