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{
$Project$
$Workfile$
$Revision$
$DateUTC$
$Id$
This file is part of the Indy (Internet Direct) project, and is offered
under the dual-licensing agreement described on the Indy website.
(http://www.indyproject.org/)
Copyright:
(c) 1993-2005, Chad Z. Hower and the Indy Pit Crew. All rights reserved.
}
{
$Log$
}
{
Rev 1.3 2/8/2004 12:59:40 PM JPMugaas
Start on DotNET port.
Rev 1.2 10/16/2003 11:05:38 PM SPerry
Reorganization
Rev 1.1 2003.09.30 1:23:02 PM czhower
Stack split for DotNet
Rev 1.0 11/13/2002 08:45:44 AM JPMugaas
}
unit IdRawHeaders;
interface
{$I IdCompilerDefines.inc}
uses
{$IFDEF DOTNET}
System.Net,
{$ENDIF}
IdGlobal,
IdStruct;
// TODO: research subtypes of ICMP header
type
//RFC 3542 definitions
//IPv6 Extension Headers
// types redeclared to avoid dependencies on stack declarations
TIdSunB = class(TIdStruct)
protected
Fs_b1,
Fs_b2,
Fs_b3,
Fs_b4: UInt8;
function GetBytesLen: UInt32; override;
public
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
property s_b1 : UInt8 read Fs_b1 write Fs_b1;
property s_b2 : UInt8 read Fs_b2 write Fs_b2;
property s_b3 : UInt8 read Fs_b3 write Fs_b3;
property s_b4 : UInt8 read Fs_b4 write Fs_b4;
end;
TIdSunW = class(TIdStruct)
protected
Fs_w1, Fs_w2: UInt16;
function GetBytesLen: UInt32; override;
public
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
property s_w1 : UInt16 read Fs_w1 write Fs_w1;
property s_w2 : UInt16 read Fs_w2 write Fs_w2;
end;
TIdInAddr = class(TIdLongWord)
public
procedure CopyFrom(const ASource : TIdInAddr);
end;
{ PIdInAddr = ^TIdInAddr;
TIdInAddr = record
case integer of
0: (S_un_b: TIdSunB);
1: (S_un_w: TIdSunW);
2: (S_addr: UInt32);
end; }
TIdNetTime = UInt32; // network byte order
const
//header sizes----------------------------------------------------------------//
Id_ARP_HSIZE = $1C; // ARP header: 28 bytes
Id_DNS_HSIZE = $0C; // DNS header base: 12 bytes
Id_ETH_HSIZE = $0E; // Etherner header: 14 bytes
Id_ICMP_HSIZE = $04; // ICMP header base: 4 bytes
Id_ICMP_ECHO_HSIZE = $08; // ICMP_ECHO header: 8 bytes
Id_ICMP6_ECHO_HSIZE = $08; // ICMPv6_ECHO header: 8 bytes icmp echo header len excluding time */
Id_ICMP_MASK_HSIZE = $0C; // ICMP_MASK header: 12 bytes
Id_ICMP_UNREACH_HSIZE = $08; // ICMP_UNREACH header: 8 bytes
Id_ICMP_TIMEXCEED_HSIZE = $08; // ICMP_TIMXCEED header: 8 bytes
Id_ICMP_REDIRECT_HSIZE = $08; // ICMP_REDIRECT header: 8 bytes
Id_ICMP_TS_HSIZE = $14; // ICMP_TIMESTAMP header: 20 bytes
Id_IGMP_HSIZE = $08; // IGMP header: 8 bytes
Id_IP_HSIZE = $14; // IP header: 20 bytes
Id_IPv6_HSIZE = $28; // IPv6 header
Id_RIP_HSIZE = $18; // RIP header base: 24 bytes
Id_TCP_HSIZE = $14; // TCP header: 20 bytes
Id_UDP_HSIZE = $08; // UDP header: 8 bytes
//fragmentation flags---------------------------------------------------------//
Id_IP_RF = $8000; // reserved fragment flag
Id_IP_DF = $4000; // dont fragment flag
Id_IP_MF = $2000; // more fragments flag
Id_IP_OFFMASK = $1FFF; // mask for fragmenting bits
//TCP control flags-----------------------------------------------------------//
Id_TCP_FIN = $01;
Id_TCP_SYN = $02;
Id_TCP_RST = $04;
Id_TCP_PUSH = $08;
Id_TCP_ACK = $10;
Id_TCP_URG = $20;
//ICMP types------------------------------------------------------------------//
Id_ICMP_ECHOREPLY = 0;
Id_ICMP_UNREACH = 3;
Id_ICMP_SOURCEQUENCH = 4;
Id_ICMP_REDIRECT = 5;
Id_ICMP_ECHO = 8;
Id_ICMP_ROUTERADVERT = 9;
Id_ICMP_ROUTERSOLICIT = 10;
Id_ICMP_TIMXCEED = 11;
Id_ICMP_PARAMPROB = 12;
Id_ICMP_TSTAMP = 13;
Id_ICMP_TSTAMPREPLY = 14;
Id_ICMP_IREQ = 15;
Id_ICMP_IREQREPLY = 16;
Id_ICMP_MASKREQ = 17;
Id_ICMP_MASKREPLY = 18;
Id_ICMP_TRACEROUTE = 30; // RFC1393 Traceroute
Id_ICMP_DATAGRAM_CONV = 31; // RFC1475
Id_ICMP_MOB_HOST_REDIR = 32; // Mobile Host Redirect
Id_ICMP_IPv6_WHERE_ARE_YOU = 33;
Id_ICMP_IPv6_I_AM_HERE = 34;
Id_ICMP_MOB_REG_REQ = 35;
Id_ICMP_MOB_REG_REPLY = 36;
Id_ICMP_SKIP = 39;
Id_ICMP_PHOTURIS = 40; // Photuris [RFC2521]
//ICMP codes------------------------------------------------------------------//
Id_ICMP_UNREACH_NET = 0;
Id_ICMP_UNREACH_HOST = 1;
Id_ICMP_UNREACH_PROTOCOL = 2;
Id_ICMP_UNREACH_PORT = 3;
Id_ICMP_UNREACH_NEEDFRAG = 4;
Id_ICMP_UNREACH_SRCFAIL = 5;
Id_ICMP_UNREACH_NET_UNKNOWN = 6;
Id_ICMP_UNREACH_HOST_UNKNOWN = 7;
Id_ICMP_UNREACH_ISOLATED = 8;
Id_ICMP_UNREACH_NET_PROHIB = 9;
Id_ICMP_UNREACH_HOST_PROHIB = 10;
Id_ICMP_UNREACH_TOSNET = 11;
Id_ICMP_UNREACH_TOSHOST = 12;
Id_ICMP_UNREACH_FILTER_PROHIB = 13;
Id_ICMP_UNREACH_HOST_PRECEDENCE = 14;
Id_ICMP_UNREACH_PRECEDENCE_CUTOFF = 15;
Id_ICMP_REDIRECT_NET = 0;
Id_ICMP_REDIRECT_HOST = 1;
Id_ICMP_REDIRECT_TOSNET = 2;
Id_ICMP_REDIRECT_TOSHOST = 3;
Id_ICMP_TIMXCEED_INTRANS = 0;
Id_ICMP_TIMXCEED_REASS = 1;
Id_ICMP_PARAMPROB_OPTABSENT = 1;
// RFC 1393
Id_ICMP_TRACEROUTE_PACKET_FORWARDED = 0;
Id_ICMP_TRACEROUTE_NO_ROUTE = 1;
Id_ICMP_BAD_SPI = 0; //security parameter error 40
Id_ICMP_AUTH_FAILED = 1;
Id_ICMP_DECOMPRESS_FAILED = 2;
Id_ICMP_DECRYPTION_FAILED = 3;
Id_ICMP_NEED_AUTHENTICATION = 4;
Id_ICMP_NEED_AUTHORIZATION = 5;
// RFC 1475 error codes
// The type for Conversion Failed is 31
Id_ICMP_CONV_UNSPEC = 0;
Id_ICMP_CONV_DONTCONV_OPTION = 1;
Id_ICMP_CONV_UNKNOWN_MAN_OPTION = 2;
Id_ICMP_CONV_UNKNWON_UNSEP_OPTION = 3;
Id_ICMP_CONV_UNSEP_TRANSPORT = 4;
Id_ICMP_CONV_OVERALL_LENGTH_EXCEEDED = 5;
Id_ICMP_CONV_IP_HEADER_LEN_EXCEEDED = 6;
Id_ICMP_CONV_TRANS_PROT_255 = 7; // transport protocol > 255
Id_ICMP_CONV_PORT_OUT_OF_RANGE = 8;
Id_ICMP_CONV_TRANS_HEADER_LEN_EXCEEDED = 9;
Id_ICMP_CONV_32BIT_ROLLOVER_AND_ACK = 10; // 32 Bit Rollover missing and ACK set
Id_ICMP_CONV_UNKNOWN_MAN_TRANS_OPTION = 11;
ICMP_MIN = 8;
//ICMPv6 types----------------------------------------------------------------//
ICMP6_DST_UNREACH = 1;
ICMP6_PACKET_TOO_BIG = 2;
ICMP6_TIME_EXCEEDED = 3;
ICMP6_PARAM_PROB = 4;
// Informational Messages
ICMP6_INFOMSG_MASK = $80; //* all informational messages */
ICMP6_ECHO_REQUEST = 128;
ICMP6_ECHO_REPLY = 129;
ICMP6_MEMBERSHIP_QUERY = 130;
ICMP6_MEMBERSHIP_REPORT = 131;
ICMP6_MEMBERSHIP_REDUCTION = 132;
//ICMPv6 codes----------------------------------------------------------------//
ICMP6_DST_UNREACH_NOROUTE = 0; //* no route to destination */
ICMP6_DST_UNREACH_ADMIN = 1; //* communication with */
//* destination */
//* administratively */
//* prohibited */
ICMP6_DST_UNREACH_NOTNEIGHBOR = 2; //* not a neighbor */
ICMP6_DST_UNREACH_ADDR = 3; //* address unreachable */
ICMP6_DST_UNREACH_NOPORT = 4; //* bad port */
ICMP6_DST_UNREACH_SOURCE_FILTERING = 5; //source address failed ingress/egress policy
ICMP6_DST_UNREACH_REJCT_DST = 6; //reject route to destination
ICMP6_TIME_EXCEED_TRANSIT = 0; //* Hop Limit == 0 in transit */
ICMP6_TIME_EXCEED_REASSEMBLY = 1; //* Reassembly time out */
ICMP6_PARAMPROB_HEADER = 0; //* erroneous header field */
ICMP6_PARAMPROB_NEXTHEADER = 1; //* unrecognized Next Header */
ICMP6_PARAMPROB_OPTION = 2; //* unrecognized IPv6 option */
// ICMPv6 Neighbor Discovery Definitions
ND_ROUTER_SOLICIT = 133;
ND_ROUTER_ADVERT = 134;
ND_NEIGHBOR_SOLICIT = 135;
ND_NEIGHBOR_ADVERT = 136;
ND_REDIRECT = 137;
//IGMP types------------------------------------------------------------------//
Id_IGMP_MEMBERSHIP_QUERY = $11; // membership query
Id_IGMP_V1_MEMBERSHIP_REPORT = $12; // v1 membership report
Id_IGMP_V2_MEMBERSHIP_REPORT = $16; // v2 membership report
Id_IGMP_LEAVE_GROUP = $17; // leave-group message
//ethernet packet types-------------------------------------------------------//
Id_ETHERTYPE_PUP = $0200; // PUP protocol
Id_ETHERTYPE_IP = $0800; // IP protocol
Id_ETHERTYPE_ARP = $0806; // ARP protocol
Id_ETHERTYPE_REVARP = $8035; // reverse ARP protocol
Id_ETHERTYPE_VLAN = $8100; // IEEE 802.1Q VLAN tagging
Id_ETHERTYPE_LOOPBACK = $9000; // used to test interfaces
//hardware address formats----------------------------------------------------//
Id_ARPHRD_ETHER = 1; // ethernet hardware format
//ARP operation types---------------------------------------------------------//
Id_ARPOP_REQUEST = 1; // req to resolve address
Id_ARPOP_REPLY = 2; // resp to previous request
Id_ARPOP_REVREQUEST = 3; // req protocol address given hardware
Id_ARPOP_REVREPLY = 4; // resp giving protocol address
Id_ARPOP_INVREQUEST = 8; // req to identify peer
Id_ARPOP_INVREPLY = 9; // resp identifying peer
//RIP commands----------------------------------------------------------------//
Id_RIPCMD_REQUEST = 1; // want info
Id_RIPCMD_RESPONSE = 2; // responding to request
Id_RIPCMD_TRACEON = 3; // turn tracing on
Id_RIPCMD_TRACEOFF = 4; // turn it off
Id_RIPCMD_POLL = 5; // like request, but anyone answers
Id_RIPCMD_POLLENTRY = 6; // like poll, but for entire entry
Id_RIPCMD_MAX = 7;
//RIP versions----------------------------------------------------------------//
Id_RIPVER_0 = 0;
Id_RIPVER_1 = 1;
Id_RIPVER_2 = 2;
//----------------------------------------------------------------------------//
Id_MAX_IPOPTLEN = 40;
Id_IP_MAXPACKET = 65535;
Id_ETHER_ADDR_LEN = 6;
type
////////////////////////////////////////////////////////////////////////////////
//ICMP//////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
TIdICMPEcho = class(TIdStruct)
protected
Fid: UInt16; // identifier to match requests with replies
Fseq: UInt16; // sequence number to match requests with replies
function GetBytesLen: UInt32; override;
public
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
property id: UInt16 read Fid write FId; // identifier to match requests with replies
property seq: UInt16 read Fseq write FSeq; // sequence number to match requests with replies
end;
TIdICMPFrag = class(TIdStruct)
protected
Fpad: UInt16;
Fmtu: UInt16;
function GetBytesLen: UInt32; override;
public
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
property pad: UInt16 read Fpad write Fpad;
property mtu: UInt16 read Fmtu write Fmtu;
end;
TIdICMPTs = class(TIdStruct)
protected
Fotime: TIdNetTime; // time message was sent, to calc roundtrip time
Frtime: TIdNetTime;
Fttime: TIdNetTime;
function GetBytesLen: UInt32; override;
public
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
property otime: TIdNetTime read Fotime write Fotime; // time message was sent, to calc roundtrip time
property rtime: TIdNetTime read Frtime write Frtime;
property ttime: TIdNetTime read Fttime write Fttime;
end;
{ packet header }
TIdicmp_hun = class(TIdUnion)
protected
function Getecho_id: UInt16;
function Getecho_seq: UInt16;
function Getfrag_mtu: UInt16;
function Getfrag_pad: UInt16;
function Getgateway_s_b1: UInt8;
function Getgateway_s_b2: UInt8;
function Getgateway_s_b3: UInt8;
function Getgateway_s_b4: UInt8;
function Getgateway_s_l: UInt32;
function Getgateway_s_w1: UInt16;
function Getgateway_s_w2: UInt16;
procedure Setecho_id(const Value: UInt16);
procedure Setecho_seq(const Value: UInt16);
procedure Setfrag_mtu(const Value: UInt16);
procedure Setfrag_pad(const Value: UInt16);
procedure Setgateway_s_b1(const Value: UInt8);
procedure Setgateway_s_b2(const Value: UInt8);
procedure Setgateway_s_b3(const Value: UInt8);
procedure Setgateway_s_b4(const Value: UInt8);
procedure Setgateway_s_l(const Value: UInt32);
procedure Setgateway_s_w1(const Value: UInt16);
procedure Setgateway_s_w2(const Value: UInt16);
public
constructor Create; override;
property echo_id: UInt16 read Getecho_id write Setecho_id; // identifier to match requests with replies
property echo_seq: UInt16 read Getecho_seq write Setecho_seq;
property gateway_s_b1 : UInt8 read Getgateway_s_b1 write Setgateway_s_b1;
property gateway_s_b2 : UInt8 read Getgateway_s_b2 write Setgateway_s_b2;
property gateway_s_b3 : UInt8 read Getgateway_s_b3 write Setgateway_s_b3;
property gateway_s_b4 : UInt8 read Getgateway_s_b4 write Setgateway_s_b4;
property gateway_s_w1 : UInt16 read Getgateway_s_w1 write Setgateway_s_w1;
property gateway_s_w2 : UInt16 read Getgateway_s_w2 write Setgateway_s_w2;
property gateway_s_l : UInt32 read Getgateway_s_l write Setgateway_s_l;
property frag_pad: UInt16 read Getfrag_pad write Setfrag_pad;
property frag_mtu: UInt16 read Getfrag_mtu write Setfrag_mtu;
end;
TIdicmp_dun = class(TIdUnion)
protected
function Getdata: UInt8;
function Getmask: UInt32;
procedure setdata(const Value: UInt8);
procedure Setmask(const Value: UInt32);
function Getts_otime: TIdNetTime;
function Getts_rtime: TIdNetTime;
function Getts_ttime: TIdNetTime;
procedure Setts_otime(const Value: TIdNetTime);
procedure Setts_rtime(const Value: TIdNetTime);
procedure Setts_ttime(const Value: TIdNetTime);
public
constructor Create; override;
property ts_otime: TIdNetTime read Getts_otime write Setts_otime; // time message was sent, to calc roundtrip time
property ts_rtime: TIdNetTime read Getts_rtime write Setts_rtime;
property ts_ttime: TIdNetTime read Getts_ttime write Setts_ttime;
property mask : UInt32 read Getmask write Setmask;
property data : UInt8 read Getdata write setdata;
end;
TIdICMPHdr = class(TIdStruct)
protected
Ficmp_type: UInt8; // message type
Ficmp_code: UInt8; // error code
Ficmp_sum: UInt16; // one's complement checksum {Do not Localize}
Ficmp_hun: TIdicmp_hun;
function GetBytesLen: UInt32; override;
public
constructor Create; override;
destructor Destroy; override;
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
property icmp_type: UInt8 read Ficmp_type write Ficmp_type; // message type
property icmp_code: UInt8 read Ficmp_code write Ficmp_code; // error code
property icmp_sum: UInt16 read Ficmp_sum write Ficmp_sum; // one's complement checksum
property icmp_hun: TIdicmp_hun read Ficmp_hun;
end;
//ICMPv6
TIdicmp6_un = class(TIdUnion)
protected
function Geticmp6_data16: UInt16;
function Geticmp6_data8: UInt8;
procedure Seticmp6_data16(const Value: UInt16);
procedure Seticmp6_data8(const Value: UInt8);
function Geticmp6_seq: UInt16;
procedure Seticmp6_seq(const Value: UInt16);
function Geticmp6_un_data16(Index: Integer): UInt16;
function Geticmp6_un_data32: UInt32;
function Geticmp6_un_data8(Index: Integer): UInt8;
procedure Seticmp6_un_data16(Index: Integer; const Value: UInt16);
procedure Seticmp6_un_data32(const Value: UInt32);
procedure Seticmp6_un_data8(Index: Integer; const Value: UInt8);
{
Ficmp6_un_data32 : UInt32; //* type-specific field */
Ficmp6_un_data16 : array[0..1] of UInt16; //* type-specific field */
icmp6_un_data8 : array[0..3] of UInt8); //* type-specific field */
}
public
constructor Create; override;
property icmp6_un_data32 : UInt32 read Geticmp6_un_data32 write Seticmp6_un_data32; //* type-specific field */
property icmp6_un_data16[Index:Integer] : UInt16 read Geticmp6_un_data16 write Seticmp6_un_data16; //array 0-1 * type-specific field */
property icmp6_un_data8[Index:Integer] : UInt8 read Geticmp6_un_data8 write Seticmp6_un_data8; //array[0-3] * type-specific field */
property icmp6_data32 : UInt32 read Geticmp6_un_data32 write Seticmp6_un_data32;
property icmp6_data16 : UInt16 read Geticmp6_data16 write Seticmp6_data16;
property icmp6_data8 : UInt8 read Geticmp6_data8 write Seticmp6_data8;
property icmp6_pptr : UInt32 read Geticmp6_un_data32 write Seticmp6_un_data32;
property icmp6_mtu : UInt32 read Geticmp6_un_data32 write Seticmp6_un_data32;
property icmp6_id : UInt16 read Geticmp6_data16 write Seticmp6_data16;
property icmp6_seq : UInt16 read Geticmp6_seq write Seticmp6_seq;
property icmp6_maxdelay : UInt16 read Geticmp6_data16 write Seticmp6_data16;
end;
TIdicmp6_hdr = class(TIdStruct)
protected
Ficmp6_type : UInt8; //* type field */
FIcmp6_code : UInt8; //* code field */
Ficmp6_cksum : UInt16; //* checksum field */
Fdata : TIdicmp6_un;
function GetBytesLen: UInt32; override;
public
constructor Create; override;
destructor Destroy; override;
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
property icmp6_type : UInt8 read Ficmp6_type write Ficmp6_type; //* type field */
property icmp6_code : UInt8 read Ficmp6_code write Ficmp6_code; //* code field */
property icmp6_cksum : UInt16 read Ficmp6_cksum write Ficmp6_cksum; //* checksum field */
property data : TIdicmp6_un read Fdata;
{ case Integer of
1: (icmp6_un_data32 : UInt32); //* type-specific field */
2: (icmp6_un_data16 : array[0..1] of UInt16); //* type-specific field */
3: (icmp6_un_data8 : array[0..3] of UInt8); //* type-specific field */
}
end;
////////////////////////////////////////////////////////////////////////////////
//IP////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
{ options struct }
TIdIPOptions = class(TIdUnion)
public
constructor Create; override;
//Delphi outputs warnings such as:
//[Hint] H2368 Visibility of property accessor method TIdIPOptions.get_ipopt_list should match property TIdIPOptions.ipopt_list
//[Hint] H2368 Visibility of property accessor method TIdIPOptions.set_ipopt_list should match property TIdIPOptions.ipopt_list
//if these aren't public
function get_ipopt_list(Index: Integer): UInt8;
procedure set_ipopt_list(Index: Integer; const Value: UInt8);
property ipopt_list[Index : Integer] : UInt8 read get_ipopt_list write set_ipopt_list; default; //options proper
end;
{ packet header }
TIdIPHdr = class(TIdStruct)
protected
Fip_verlen: UInt8; // 1st nibble version, 2nd nibble header length div 4 (little-endian)
Fip_tos: UInt8; // type of service
Fip_len: UInt16; // total length
Fip_id: UInt16; // identification
Fip_off: UInt16; // 1st nibble flags, next 3 nibbles fragment offset (little-endian)
Fip_ttl: UInt8; // time to live
Fip_p: UInt8; // protocol
Fip_sum: UInt16; // checksum
Fip_src: TIdInAddr; // source address
Fip_dst: TIdInAddr; // dest address
Fip_options: UInt32; // options + padding
function GetBytesLen: UInt32; override;
public
constructor Create; override;
destructor Destroy; override;
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
procedure CopyFrom(const ASource : TIdIPHdr);
property ip_verlen: UInt8 read Fip_verlen write Fip_verlen; // 1st nibble version, 2nd nibble header length div 4 (little-endian)
property ip_tos: UInt8 read Fip_tos write Fip_tos; // type of service
property ip_len: UInt16 read Fip_len write Fip_len; // total length
property ip_id: UInt16 read Fip_id write Fip_id; // identification
property ip_off: UInt16 read Fip_off write Fip_off; // 1st nibble flags, next 3 nibbles fragment offset (little-endian)
property ip_ttl: UInt8 read Fip_ttl write Fip_ttl; // time to live
property ip_p: UInt8 read Fip_p write Fip_p; // protocol
property ip_sum: UInt16 read Fip_sum write Fip_sum; // checksum
property ip_src: TIdInAddr read Fip_src; // source address
property ip_dst: TIdInAddr read Fip_dst; // dest address
property ip_options: UInt32 read Fip_options write Fip_options; // options + padding
end;
////////////////////////////////////////////////////////////////////////////////
//TCP///////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
{ options structure }
TIdTCPOptions = class(TIdUnion)
public
constructor Create; override;
//Delphi outputs warnings such as:
//[Hint] H2368 Visibility of property accessor method TIdTCPOptions.gettcpopt_list should match property TIdTCPOptions.tcpopt_list
//[Hint] H2368 Visibility of property accessor method TIdIPOptions.settcpopt_list should match property TIdTCPOptions.tcpopt_list
//if these aren't public
function gettcpopt_list(Index: Integer): UInt8;
procedure settcpopt_list(Index: Integer; const Value: UInt8);
property tcpopt_list[Index : Integer] : UInt8 read gettcpopt_list write settcpopt_list; default;
end;
{ packet header }
TIdTCPHdr = class(TIdStruct)
protected
Ftcp_sport: UInt16; // source port
Ftcp_dport: UInt16; // destination port
Ftcp_seq: UInt32; // sequence number
Ftcp_ack: UInt32; // acknowledgement number
Ftcp_x2off: UInt8; // data offset
Ftcp_flags: UInt8; // control flags
Ftcp_win: UInt16; // window
Ftcp_sum: UInt16; // checksum
Ftcp_urp: UInt16; // urgent pointer
function GetBytesLen: UInt32; override;
public
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
property tcp_sport: UInt16 read Ftcp_sport write Ftcp_sport; // source port
property tcp_dport: UInt16 read Ftcp_dport write Ftcp_dport; // destination port
property tcp_seq: UInt32 read Ftcp_seq write Ftcp_seq; // sequence number
property tcp_ack: UInt32 read Ftcp_ack write Ftcp_ack; // acknowledgement number
property tcp_x2off: UInt8 read Ftcp_x2off write Ftcp_x2off; // data offset
property tcp_flags: UInt8 read Ftcp_flags write Ftcp_flags; // control flags
property tcp_win: UInt16 read Ftcp_win write Ftcp_win; // window
property tcp_sum: UInt16 read Ftcp_sum write Ftcp_sum; // checksum
property tcp_urp: UInt16 read Ftcp_urp write Ftcp_urp; // urgent pointer
end;
////////////////////////////////////////////////////////////////////////////////
//UDP///////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
{ packet header }
TIdUDPHdr = class(TIdStruct)
protected
Fudp_sport: UInt16; // source port
Fudp_dport: UInt16; // destination port
Fudp_ulen: UInt16; // length
Fudp_sum: UInt16; // checksum
function GetBytesLen: UInt32; override;
public
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
property udp_sport: UInt16 read Fudp_sport write Fudp_sport; // source port
property udp_dport: UInt16 read Fudp_dport write Fudp_dport; // destination port
property udp_ulen: UInt16 read Fudp_ulen write Fudp_ulen; // length
property udp_sum: UInt16 read Fudp_sum write Fudp_sum; // checksum
end;
////////////////////////////////////////////////////////////////////////////////
//IGMP//////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
{ packet header }
TIdIGMPHdr = class(TIdStruct)
protected
Figmp_type: UInt8;
Figmp_code: UInt8;
Figmp_sum: UInt16;
Figmp_group: TIdInAddr;
function GetBytesLen: UInt32; override;
public
constructor Create; override;
destructor Destroy; override;
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
property igmp_type: UInt8 read Figmp_type write Figmp_type;
property igmp_code: UInt8 read Figmp_code write Figmp_code;
property igmp_sum: UInt16 read Figmp_sum write Figmp_sum;
property igmp_group: TIdInAddr read Figmp_group;
end;
////////////////////////////////////////////////////////////////////////////////
//ETHERNET//////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
TIdEtherAddr = class(TIdUnion)
public
constructor Create; override;
procedure CopyFrom(const ASource : TIdEtherAddr);
procedure SetData(const Value: TIdBytes);
//Delphi outputs warnings such as:
//[Hint] H2368 Visibility of property accessor method TIdEtherAddr.getether_addr_octet should match property TIdEtherAddr.ether_addr_octet
//[Hint] H2368 Visibility of property accessor method TIdEtherAddr.setether_addr_octet should match property TIdEtherAddr.ether_addr_octet
//if these aren't public
function getether_addr_octet(Index: Integer): UInt8;
procedure setether_addr_octet(Index: Integer; const Value: UInt8);
property ether_addr_octet[Index: Integer] : UInt8 read getether_addr_octet write setether_addr_octet; default;
property Data: TIdBytes read FBuffer write SetData;
end;
{ packet header }
TIdEthernetHdr = class(TIdStruct)
protected
Fether_dhost: TIdEtherAddr; // destination ethernet address
Fether_shost: TIdEtherAddr; // source ethernet address
Fether_type: UInt16; // packet type ID
function GetBytesLen: UInt32; override;
public
constructor Create; override;
destructor Destroy; override;
procedure CopyFrom(const ASource : TIdEthernetHdr);
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
property ether_dhost: TIdEtherAddr read Fether_dhost; // destination ethernet address
property ether_shost: TIdEtherAddr read Fether_shost; // source ethernet address
property ether_type: UInt16 read Fether_type write Fether_type; // packet type ID
end;
////////////////////////////////////////////////////////////////////////////////
//ARP///////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
{ packet header }
TIdARPHdr = class(TIdStruct)
protected
Farp_hrd: UInt16; // format of hardware address
Farp_pro: UInt16; // format of protocol address
Farp_hln: UInt8; // length of hardware address
Farp_pln: UInt8; // length of protocol addres
Farp_op: UInt16; // operation type
// following hardcoded for ethernet/IP
Farp_sha: TIdEtherAddr; // sender hardware address
Farp_spa: TIdInAddr; // sender protocol address
Farp_tha: TIdEtherAddr; // target hardware address
Farp_tpa: TIdInAddr; // target protocol address
function GetBytesLen: UInt32; override;
public
constructor Create; override;
destructor Destroy; override;
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
property arp_hrd: UInt16 read Farp_hrd write Farp_hrd; // format of hardware address
property arp_pro: UInt16 read Farp_pro write Farp_pro; // format of protocol address
property arp_hln: UInt8 read Farp_hln write Farp_hln; // length of hardware address
property arp_pln: UInt8 read Farp_pln write Farp_pln; // length of protocol addres
property arp_op: UInt16 read Farp_op write Farp_op; // operation type
// following hardcoded for ethernet/IP
property arp_sha: TIdEtherAddr read Farp_sha; // sender hardware address
property arp_spa: TIdInAddr read Farp_spa; // sender protocol address
property arp_tha: TIdEtherAddr read Farp_tha; // target hardware address
property arp_tpa: TIdInAddr read Farp_tpa; // target protocol address
end;
////////////////////////////////////////////////////////////////////////////////
//DNS///////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
{ header }
TIdDNSHdr = class(TIdStruct)
protected
Fdns_id: UInt16; // DNS packet ID
Fdns_flags: UInt16; // DNS flags
Fdns_num_q: UInt16; // number of questions
Fdns_num_answ_rr: UInt16; // number of answer resource records
Fdns_num_auth_rr: UInt16; // number of authority resource records
Fdns_num_addi_rr: UInt16; // number of additional resource records
function GetBytesLen: UInt32; override;
public
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
property dns_id: UInt16 read Fdns_id write Fdns_id; // DNS packet ID
property dns_flags: UInt16 read Fdns_flags write Fdns_flags; // DNS flags
property dns_num_q: UInt16 read Fdns_num_q write Fdns_num_q; // number of questions
property dns_num_answ_rr: UInt16 read Fdns_num_answ_rr write Fdns_num_answ_rr; // number of answer resource records
property dns_num_auth_rr: UInt16 read Fdns_num_auth_rr write Fdns_num_auth_rr; // number of authority resource records
property dns_num_addi_rr: UInt16 read Fdns_num_addi_rr write Fdns_num_addi_rr; // number of additional resource records
end;
////////////////////////////////////////////////////////////////////////////////
//RIP///////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
{ header }
TIdRIPHdr = class(TIdStruct)
protected
Frip_cmd: UInt8; // RIP command
Frip_ver: UInt8; // RIP version
Frip_rd: UInt16; // zero (v1) or routing domain (v2)
Frip_af: UInt16; // address family
Frip_rt: UInt16; // zero (v1) or route tag (v2)
Frip_addr: UInt32; // IP address
Frip_mask: UInt32; // zero (v1) or subnet mask (v2)
Frip_next_hop: UInt32; // zero (v1) or next hop IP address (v2)
Frip_metric: UInt32; // metric
function GetBytesLen: UInt32; override;
public
procedure ReadStruct(const ABytes : TIdBytes; var VIndex : UInt32); override;
procedure WriteStruct(var VBytes : TIdBytes; var VIndex : UInt32); override;
property rip_cmd: UInt8 read Frip_cmd write Frip_cmd; // RIP command
property rip_ver: UInt8 read Frip_ver write Frip_ver; // RIP version
property rip_rd: UInt16 read Frip_rd write Frip_rd; // zero (v1) or routing domain (v2)
property rip_af: UInt16 read Frip_af write Frip_af; // address family
property rip_rt: UInt16 read Frip_rt write Frip_rt; // zero (v1) or route tag (v2)
property rip_addr: UInt32 read Frip_addr write Frip_addr; // IP address
property rip_mask: UInt32 read Frip_mask write Frip_mask; // zero (v1) or subnet mask (v2)
property rip_next_hop: UInt32 read Frip_next_hop write Frip_next_hop; // zero (v1) or next hop IP address (v2)
property rip_metric: UInt32 read Frip_metric write Frip_metric; // metric
end;
////////////////////////////////////////////////////////////////////////////////
implementation
uses
SysUtils;
{ TIdSunB }
function TIdSunB.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + 4;
end;
procedure TIdSunB.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
begin
inherited ReadStruct(ABytes, VIndex);
Fs_b1 := ABytes[VIndex];
Inc(VIndex);
Fs_b2 := ABytes[VIndex];
Inc(VIndex);
Fs_b3 := ABytes[VIndex];
Inc(VIndex);
Fs_b4 := ABytes[VIndex];
Inc(VIndex);
end;
procedure TIdSunB.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
VBytes[VIndex] := Fs_b1;
Inc(VIndex);
VBytes[VIndex] := Fs_b2;
Inc(VIndex);
VBytes[VIndex] := Fs_b3;
Inc(VIndex);
VBytes[VIndex] := Fs_b4;
Inc(VIndex);
end;
{ TIdSunW }
function TIdSunW.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + 4;
end;
procedure TIdSunW.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
begin
inherited ReadStruct(ABytes, VIndex);
Fs_w1 := BytesToUInt16(ABytes, VIndex);
Inc(VIndex, 2);
Fs_w2 := BytesToUInt16(ABytes, VIndex);
Inc(VIndex, 2);
end;
procedure TIdSunW.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
CopyTIdUInt16(HostToLittleEndian(Fs_w1), VBytes, VIndex);
Inc(VIndex, 2);
CopyTIdUInt16(HostToLittleEndian(Fs_w2), VBytes, VIndex);
Inc(VIndex, 2);
end;
{ TIdICMPEcho }
function TIdICMPEcho.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + 4;
end;
procedure TIdICMPEcho.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
begin
inherited ReadStruct(ABytes, VIndex);
Fid := BytesToUInt16(ABytes, VIndex);
Inc(VIndex, 2);
seq := BytesToUInt16(ABytes, VIndex);
Inc(VIndex, 2);
end;
procedure TIdICMPEcho.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
CopyTIdUInt16(HostToLittleEndian(Fid), VBytes, VIndex);
Inc(VIndex, 2);
CopyTIdUInt16(HostToLittleEndian(seq), VBytes, VIndex);
Inc(VIndex, 2);
end;
{ TIdICMPFrag }
function TIdICMPFrag.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + 4;
end;
procedure TIdICMPFrag.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
begin
inherited ReadStruct(ABytes, VIndex);
Fpad := BytesToUInt16(ABytes, VIndex);
Inc(VIndex, 2);
Fmtu := BytesToUInt16(ABytes, VIndex);
Inc(VIndex, 2);
end;
procedure TIdICMPFrag.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
CopyTIdUInt16(HostToLittleEndian(Fpad), VBytes, VIndex);
Inc(VIndex, 2);
CopyTIdUInt16(HostToLittleEndian(Fmtu), VBytes, VIndex);
Inc(VIndex, 2);
end;
{ TIdICMPTs }
function TIdICMPTs.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + 12;
end;
procedure TIdICMPTs.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
begin
inherited ReadStruct(ABytes, VIndex);
Fotime := BytesToUInt32(ABytes, VIndex); // time message was sent, to calc roundtrip time
Inc(VIndex, 4);
Frtime := BytesToUInt32(ABytes, VIndex);
Inc(VIndex, 4);
Fttime := BytesToUInt32(ABytes, VIndex);
Inc(VIndex, 4);
end;
procedure TIdICMPTs.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
CopyTIdUInt16(HostToLittleEndian(Fotime), VBytes, VIndex); // time message was sent, to calc roundtrip time
Inc(VIndex, 4);
CopyTIdUInt16(HostToLittleEndian(Frtime), VBytes, VIndex);
Inc(VIndex, 4);
CopyTIdUInt16(HostToLittleEndian(Fttime), VBytes, VIndex);
Inc(VIndex, 4);
end;
{ TIdicmp_hun }
constructor TIdicmp_hun.Create;
begin
inherited Create;
SetBytesLen(4);
end;
function TIdicmp_hun.Getecho_id: UInt16;
begin
Result := Getgateway_s_w1;
end;
procedure TIdicmp_hun.Setecho_id(const Value: UInt16);
begin
Setgateway_s_w1(Value);
end;
function TIdicmp_hun.Getecho_seq: UInt16;
begin
Result := Getgateway_s_w2;
end;
procedure TIdicmp_hun.Setecho_seq(const Value: UInt16);
begin
Setgateway_s_w2(Value);
end;
function TIdicmp_hun.Getgateway_s_w1: UInt16;
begin
Result := BytesToUInt32(FBuffer, 0);
end;
procedure TIdicmp_hun.Setgateway_s_w1(const Value: UInt16);
begin
CopyTIdUInt32(Value, FBuffer, 0);
end;
function TIdicmp_hun.Getgateway_s_w2: UInt16;
begin
Result := BytesToUInt16(FBuffer, 2);
end;
procedure TIdicmp_hun.Setgateway_s_w2(const Value: UInt16);
begin
CopyTIdUInt16(HostToLittleEndian(Value), FBuffer, 2);
end;
function TIdicmp_hun.Getgateway_s_b1: UInt8;
begin
Result := FBuffer[0];
end;
procedure TIdicmp_hun.Setgateway_s_b1(const Value: UInt8);
begin
FBuffer[0] := Value;
end;
function TIdicmp_hun.Getgateway_s_b2: UInt8;
begin
Result := FBuffer[1];
end;
procedure TIdicmp_hun.Setgateway_s_b2(const Value: UInt8);
begin
FBuffer[1] := Value;
end;
function TIdicmp_hun.Getgateway_s_b3: UInt8;
begin
Result := FBuffer[2];
end;
procedure TIdicmp_hun.Setgateway_s_b3(const Value: UInt8);
begin
FBuffer[2] := Value;
end;
function TIdicmp_hun.Getgateway_s_b4: UInt8;
begin
Result := FBuffer[3];
end;
procedure TIdicmp_hun.Setgateway_s_b4(const Value: UInt8);
begin
FBuffer[3] := Value;
end;
function TIdicmp_hun.Getgateway_s_l: UInt32;
begin
Result := BytesToUInt32(FBuffer, 0);
end;
procedure TIdicmp_hun.Setgateway_s_l(const Value: UInt32);
begin
CopyTIdUInt32(Value, FBuffer, 0);
end;
function TIdicmp_hun.Getfrag_pad: UInt16;
begin
Result := Getgateway_s_w1;
end;
procedure TIdicmp_hun.Setfrag_pad(const Value: UInt16);
begin
Setgateway_s_w1(Value);
end;
function TIdicmp_hun.Getfrag_mtu: UInt16;
begin
Result := Getgateway_s_w2;
end;
procedure TIdicmp_hun.Setfrag_mtu(const Value: UInt16);
begin
Setgateway_s_w2(Value);
end;
{ TIdicmp_dun }
constructor TIdicmp_dun.Create;
begin
inherited Create;
SetBytesLen(12);
end;
function TIdicmp_dun.Getts_otime: TIdNetTime;
begin
Result := BytesToUInt32(FBuffer, 0);
end;
procedure TIdicmp_dun.Setts_otime(const Value: TIdNetTime);
begin
CopyTIdUInt32(Value, FBuffer, 0);
end;
function TIdicmp_dun.Getts_rtime: TIdNetTime;
begin
Result := BytesToUInt32(FBuffer, 4);
end;
procedure TIdicmp_dun.Setts_rtime(const Value: TIdNetTime);
begin
CopyTIdUInt32(Value, FBuffer, 4);
end;
function TIdicmp_dun.Getts_ttime: TIdNetTime;
begin
Result := BytesToUInt32(FBuffer, 4);
end;
procedure TIdicmp_dun.Setts_ttime(const Value: TIdNetTime);
begin
CopyTIdUInt32(Value, FBuffer, 8);
end;
function TIdicmp_dun.Getmask: UInt32;
begin
Result := Getts_otime;
end;
procedure TIdicmp_dun.Setmask(const Value: UInt32);
begin
Setts_otime(Value);
end;
function TIdicmp_dun.Getdata: UInt8;
begin
Result := FBuffer[0];
end;
procedure TIdicmp_dun.setdata(const Value: UInt8);
begin
FBuffer[0] := Value;
end;
{ TIdICMPHdr }
constructor TIdICMPHdr.Create;
begin
inherited Create;
Ficmp_hun := TIdicmp_hun.Create;
end;
destructor TIdICMPHdr.Destroy;
begin
FreeAndNil(Ficmp_hun);
inherited Destroy;
end;
function TIdICMPHdr.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + 4 + Ficmp_hun.BytesLen;
end;
procedure TIdICMPHdr.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
begin
inherited ReadStruct(ABytes, VIndex);
Ficmp_type := ABytes[VIndex];
Inc(VIndex);
Ficmp_code := ABytes[Vindex];
Inc(VIndex);
Ficmp_sum := BytesToUInt16(ABytes, VIndex);
Inc(VIndex, 2);
Ficmp_hun.ReadStruct(ABytes, VIndex);
end;
procedure TIdICMPHdr.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
VBytes[VIndex] := Ficmp_type;
Inc(VIndex);
VBytes[Vindex] := Ficmp_code;
Inc(VIndex);
CopyTIdUInt16(Ficmp_sum, VBytes, VIndex);
Inc(VIndex, 2);
Ficmp_hun.WriteStruct(VBytes, VIndex);
end;
{ TIdIPOptions }
constructor TIdIPOptions.Create;
begin
inherited Create;
SetBytesLen(Id_MAX_IPOPTLEN);
end;
function TIdIPOptions.get_ipopt_list(Index: Integer): UInt8;
begin
Assert(Index < Id_MAX_IPOPTLEN, 'Out of range'); {do not localize}
Result := FBuffer[Index];
end;
procedure TIdIPOptions.set_ipopt_list(Index: Integer; const Value: UInt8);
begin
Assert(Index < Id_MAX_IPOPTLEN, 'Out of range'); {do not localize}
FBuffer[Index] := Value;
end;
{ TIdIPHdr }
constructor TIdIPHdr.Create;
begin
inherited Create;
Fip_src := TIdInAddr.Create;
Fip_dst := TIdInAddr.Create;
end;
destructor TIdIPHdr.Destroy;
begin
FreeAndNil(Fip_src);
FreeAndNil(Fip_dst);
inherited Destroy;
end;
function TIdIPHdr.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + 12 + Fip_src.BytesLen + Fip_dst.BytesLen + 4;
end;
procedure TIdIPHdr.CopyFrom(const ASource: TIdIPHdr);
begin
Fip_verlen := ASource.ip_verlen;
Fip_tos := ASource.ip_tos;
Fip_len := ASource.ip_len;
Fip_id := ASource.ip_id;
Fip_off := ASource.ip_off;
Fip_ttl := ASource.ip_ttl;
Fip_p := ASource.ip_p;
Fip_sum := ASource.ip_sum;
Fip_src.CopyFrom(ASource.ip_src);
Fip_dst.CopyFrom(ASource.ip_dst);
Fip_options := ASource.ip_options;
end;
procedure TIdIPHdr.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
var LIpHeaderLen : UInt32;
begin
inherited ReadStruct(ABytes, VIndex);
Fip_verlen := ABytes[VIndex]; // 1st nibble version, 2nd nibble header length div 4 (little-endian)
Inc(VIndex);
LIpHeaderLen := (Fip_verlen and $0F) * 4;
Fip_tos := ABytes[VIndex]; // type of service
Inc(VIndex);
Fip_len := BytesToUInt16(ABytes, VIndex); // total length
Inc(VIndex, 2);
Fip_id := BytesToUInt16(ABytes, VIndex); // identification
Inc(VIndex, 2);
Fip_off := BytesToUInt16(ABytes, VIndex); // 1st nibble flags, next 3 nibbles fragment offset (little-endian)
Inc(VIndex, 2);
Fip_ttl := ABytes[VIndex]; // time to live
Inc(VIndex);
Fip_p := ABytes[VIndex]; // protocol
Inc(VIndex);
Fip_sum := BytesToUInt16(ABytes, VIndex); // checksum
Inc(VIndex, 2);
Fip_src.ReadStruct(ABytes, VIndex); // source address
Fip_dst.ReadStruct(ABytes, VIndex); // dest address
//Fip_options may not be present in the packet
if VIndex >= LIpHeaderLen then
begin
Fip_options := BytesToUInt32(ABytes, VIndex); // options + padding
end;
//be sure that we indicate we read the entire packet in case
//the size varies.
VIndex := LIpHeaderLen;
end;
procedure TIdIPHdr.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
VBytes[VIndex] := Fip_verlen; // 1st nibble version, 2nd nibble header length div 4 (little-endian)
Inc(VIndex);
VBytes[VIndex] := Fip_tos; // type of service
Inc(VIndex);
CopyTIdUInt16(Fip_len, VBytes, VIndex); // total length
Inc(VIndex, 2);
CopyTIdUInt16(Fip_id, VBytes, VIndex); // identification
Inc(VIndex, 2);
CopyTIdUInt16(Fip_off, VBytes, VIndex); // 1st nibble flags, next 3 nibbles fragment offset (little-endian)
Inc(VIndex, 2);
Fip_ttl := VBytes[VIndex]; // time to live
Inc(VIndex);
Fip_p := VBytes[VIndex]; // protocol
Inc(VIndex);
CopyTIdUInt16(Fip_sum, VBytes, VIndex); // checksum
Inc(VIndex, 2);
Fip_src.WriteStruct(VBytes, VIndex); // source address
Fip_dst.WriteStruct(VBytes, VIndex); // dest address
CopyTIdUInt32(Fip_options, VBytes, VIndex); // options + padding
Inc(VIndex, 4);
end;
{ TIdTCPOptions }
constructor TIdTCPOptions.Create;
begin
inherited Create;
SetBytesLen(Id_MAX_IPOPTLEN);
end;
function TIdTCPOptions.gettcpopt_list(Index: Integer): UInt8;
begin
Assert(Index < Id_MAX_IPOPTLEN, 'Out of range');
Result := FBuffer[Index];
end;
procedure TIdTCPOptions.settcpopt_list(Index: Integer; const Value: UInt8);
begin
Assert(Index < Id_MAX_IPOPTLEN, 'Out of range');
FBuffer[Index] := Value;
end;
{ TIdTCPHdr }
function TIdTCPHdr.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + 20;
end;
procedure TIdTCPHdr.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
begin
inherited ReadStruct(ABytes, VIndex);
Ftcp_sport := BytesToUInt16(ABytes, VIndex); // source port
Inc(VIndex, 2);
Ftcp_dport := BytesToUInt16(ABytes, VIndex); // destination port
Inc(VIndex, 2);
Ftcp_seq := BytesToUInt32(ABytes, VIndex); // sequence number
Inc(VIndex, 4);
Ftcp_ack := BytesToUInt32(ABytes, VIndex); // acknowledgement number
Inc(VIndex, 4);
Ftcp_x2off := ABytes[VIndex]; // data offset
Inc(VIndex);
Ftcp_flags := ABytes[VIndex]; // control flags
Inc(VIndex);
Ftcp_win := BytesToUInt16(ABytes, VIndex); // window
Inc(VIndex, 2);
Ftcp_sum := BytesToUInt16(ABytes, VIndex); // checksum
Inc(VIndex, 2);
Ftcp_urp := BytesToUInt16(ABytes, VIndex); // urgent pointer
Inc(VIndex, 2);
end;
procedure TIdTCPHdr.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
CopyTIdUInt16(Ftcp_sport, VBytes, VIndex); // source port
Inc(VIndex, 2);
CopyTIdUInt16(Ftcp_dport, VBytes, VIndex); // destination port
Inc(VIndex, 2);
CopyTIdUInt32(Ftcp_seq, VBytes, VIndex); // sequence number
Inc(VIndex, 4);
CopyTIdUInt32(Ftcp_ack, VBytes, VIndex); // acknowledgement number
Inc(VIndex, 4);
VBytes[VIndex] := Ftcp_x2off; // data offset
Inc(VIndex);
VBytes[VIndex] := Ftcp_flags; // control flags
Inc(VIndex);
CopyTIdUInt16(Ftcp_win, VBytes, VIndex); // window
Inc(VIndex, 2);
CopyTIdUInt16(Ftcp_sum, VBytes, VIndex); // checksum
Inc(VIndex, 2);
CopyTIdUInt16(Ftcp_urp, VBytes, VIndex); // urgent pointer
Inc(VIndex, 2);
end;
{ TIdUDPHdr }
function TIdUDPHdr.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + 8;
end;
procedure TIdUDPHdr.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
begin
inherited ReadStruct(ABytes, VIndex);
Fudp_sport := BytesToUInt16(ABytes, VIndex); // source port
Inc(VIndex, 2);
Fudp_dport := BytesToUInt16(ABytes, VIndex); // destination port
Inc(VIndex, 2);
Fudp_ulen := BytesToUInt16(ABytes, VIndex); // length
Inc(VIndex, 2);
Fudp_sum := BytesToUInt16(ABytes, VIndex); // checksum
Inc(VIndex, 2);
end;
procedure TIdUDPHdr.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
CopyTIdUInt16(Fudp_sport, VBytes, VIndex); // source port
Inc(VIndex, 2);
CopyTIdUInt16(Fudp_dport, VBytes, VIndex); // destination port
Inc(VIndex, 2);
CopyTIdUInt16(Fudp_ulen, VBytes, VIndex); // length
Inc(VIndex, 2);
CopyTIdUInt16(Fudp_sum, VBytes, VIndex); // checksum
Inc(VIndex, 2);
end;
{ TIdIGMPHdr }
constructor TIdIGMPHdr.Create;
begin
inherited Create;
Figmp_group := TIdInAddr.Create;
end;
destructor TIdIGMPHdr.Destroy;
begin
FreeAndNil(Figmp_group);
inherited Destroy;
end;
function TIdIGMPHdr.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + 4 + Figmp_group.BytesLen;
end;
procedure TIdIGMPHdr.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
begin
inherited ReadStruct(ABytes, VIndex);
Figmp_type := ABytes[VIndex];
Inc(VIndex);
Figmp_code := ABytes[VIndex];
Inc(VIndex);
Figmp_sum := BytesToUInt16(ABytes, VIndex);
Inc(VIndex, 2);
Figmp_group.ReadStruct(ABytes, VIndex);
end;
procedure TIdIGMPHdr.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
VBytes[VIndex] := Figmp_type;
Inc(VIndex);
VBytes[VIndex] := Figmp_code;
Inc(VIndex);
CopyTIdUInt16(Figmp_sum, VBytes, VIndex);
Inc(VIndex, 2);
Figmp_group.WriteStruct(VBytes, VIndex);
end;
{ TIdEtherAddr }
constructor TIdEtherAddr.Create;
begin
inherited Create;
SetBytesLen(Id_ETHER_ADDR_LEN);
end;
procedure TIdEtherAddr.setether_addr_octet(Index: Integer; const Value: UInt8);
begin
Assert(Index < Id_ETHER_ADDR_LEN, 'Out of range');
FBuffer[Index] := Value;
end;
function TIdEtherAddr.getether_addr_octet(Index: Integer): UInt8;
begin
Assert(Index < Id_ETHER_ADDR_LEN, 'Out of range');
Result := FBuffer[Index];
end;
procedure TIdEtherAddr.CopyFrom(const ASource: TIdEtherAddr);
begin
SetData(ASource.Data);
end;
procedure TIdEtherAddr.SetData(const Value: TIdBytes);
begin
CopyTIdBytes(Value, 0, FBuffer, 0, Id_ETHER_ADDR_LEN);
end;
{ TIdEthernetHdr }
constructor TIdEthernetHdr.Create;
begin
inherited Create;
Fether_dhost := TIdEtherAddr.Create;
Fether_shost := TIdEtherAddr.Create;
end;
destructor TIdEthernetHdr.Destroy;
begin
FreeAndNil(Fether_dhost);
FreeAndNil(Fether_shost);
inherited Destroy;
end;
function TIdEthernetHdr.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + Fether_dhost.BytesLen + Fether_shost.BytesLen + 2;
end;
procedure TIdEthernetHdr.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
begin
inherited ReadStruct(ABytes, VIndex);
Fether_dhost.ReadStruct(ABytes, VIndex); // destination ethernet address
Fether_shost.ReadStruct(ABytes, VIndex); // source ethernet address
Fether_type := BytesToUInt16(ABytes, VIndex); // packet type ID
Inc(VIndex, 2);
end;
procedure TIdEthernetHdr.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
Fether_dhost.WriteStruct(VBytes, VIndex); // destination ethernet address
Fether_shost.WriteStruct(VBytes, VIndex); // source ethernet address
CopyTIdUInt16(Fether_type, VBytes, VIndex); // packet type ID
Inc(VIndex, 2);
end;
procedure TIdEthernetHdr.CopyFrom(const ASource: TIdEthernetHdr);
begin
Fether_dhost.CopyFrom(ASource.Fether_dhost);
Fether_shost.CopyFrom(ASource.Fether_shost);
Fether_type := ASource.Fether_type;
end;
{ TIdARPHdr }
constructor TIdARPHdr.Create;
begin
inherited Create;
Farp_sha := TIdEtherAddr.Create; // sender hardware address
Farp_spa := TIdInAddr.Create; // sender protocol address
Farp_tha := TIdEtherAddr.Create; // target hardware address
Farp_tpa := TIdInAddr.Create; // target protocol address
end;
destructor TIdARPHdr.Destroy;
begin
FreeAndNil(Farp_sha);
FreeAndNil(Farp_spa);
FreeAndNil(Farp_tha);
FreeAndNil(Farp_tpa);
inherited Destroy;
end;
function TIdARPHdr.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + 8 + Farp_sha.BytesLen + Farp_spa.BytesLen + Farp_tha.BytesLen + Farp_tpa.BytesLen;
end;
procedure TIdARPHdr.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
begin
inherited ReadStruct(ABytes, VIndex);
Farp_hrd := BytesToUInt16(ABytes, VIndex); // format of hardware address
Inc(VIndex, 2);
Farp_pro := BytesToUInt16(ABytes, VIndex); // format of protocol address
Inc(VIndex, 2);
Farp_hln := ABytes[VIndex]; // length of hardware address
Inc(VIndex);
Farp_pln := ABytes[VIndex]; // length of protocol addres
Inc(VIndex);
Farp_op := BytesToUInt16(ABytes, VIndex); // operation type
Inc(VIndex, 2);
// following hardcoded for ethernet/IP
Farp_sha.ReadStruct(ABytes, VIndex); // sender hardware address
Farp_spa.ReadStruct(ABytes, VIndex); // sender protocol address
Farp_tha.ReadStruct(ABytes, VIndex); // target hardware address
Farp_tpa.ReadStruct(ABytes, VIndex); // target protocol address
end;
procedure TIdARPHdr.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
CopyTIdUInt16(Farp_hrd, VBytes, VIndex); // format of hardware address
Inc(VIndex, 2);
CopyTIdUInt16(Farp_pro, VBytes, VIndex); // format of protocol address
Inc(VIndex, 2);
VBytes[VIndex] := Farp_hln; // length of hardware address
Inc(VIndex);
VBytes[VIndex] := Farp_pln; // length of protocol addres
Inc(VIndex);
CopyTIdUInt16(Farp_op, VBytes, VIndex); // operation type
Inc(VIndex, 2);
// following hardcoded for ethernet/IP
Farp_sha.WriteStruct(VBytes, VIndex); // sender hardware address
Farp_spa.WriteStruct(VBytes, VIndex); // sender protocol address
Farp_tha.WriteStruct(VBytes, VIndex); // target hardware address
Farp_tpa.WriteStruct(VBytes, VIndex); // target protocol address
end;
{ TIdDNSHdr }
function TIdDNSHdr.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + 12;
end;
procedure TIdDNSHdr.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
begin
inherited ReadStruct(ABytes, VIndex);
Fdns_id := BytesToUInt16(ABytes, VIndex); // DNS packet ID
Inc(VIndex, 2);
Fdns_flags := BytesToUInt16(ABytes, VIndex); // DNS flags
Inc(VIndex, 2);
Fdns_num_q := BytesToUInt16(ABytes, VIndex); // number of questions
Inc(VIndex, 2);
Fdns_num_answ_rr := BytesToUInt16(ABytes, VIndex);// number of answer resource records
Inc(VIndex, 2);
Fdns_num_auth_rr := BytesToUInt16(ABytes, VIndex); // number of authority resource records
Inc(VIndex, 2);
Fdns_num_addi_rr := BytesToUInt16(ABytes, VIndex); // number of additional resource records
Inc(VIndex, 2);
end;
procedure TIdDNSHdr.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
CopyTIdUInt16(Fdns_id, VBytes, VIndex); // DNS packet ID
Inc(VIndex, 2);
CopyTIdUInt16(Fdns_flags, VBytes, VIndex); // DNS flags
Inc(VIndex, 2);
CopyTIdUInt16(Fdns_num_q, VBytes, VIndex); // number of questions
Inc(VIndex, 2);
CopyTIdUInt16(Fdns_num_answ_rr, VBytes, VIndex); // number of answer resource records
Inc(VIndex, 2);
CopyTIdUInt16(Fdns_num_auth_rr, VBytes, VIndex); // number of authority resource records
Inc(VIndex, 2);
CopyTIdUInt16(Fdns_num_addi_rr, VBytes, VIndex); // number of additional resource records
Inc(VIndex, 2);
end;
{ TIdRIPHdr }
function TIdRIPHdr.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + 24;
end;
procedure TIdRIPHdr.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
begin
inherited ReadStruct(ABytes, VIndex);
Frip_cmd := ABytes[VIndex]; // RIP command
Inc(VIndex);
Frip_ver := ABytes[VIndex]; // RIP version
Inc(VIndex);
Frip_rd := BytesToUInt16(ABytes, VIndex); // zero (v1) or routing domain (v2)
Inc(VIndex, 2);
Frip_af := BytesToUInt16(ABytes, VIndex); // address family
Inc(VIndex, 2);
Frip_rt := BytesToUInt16(ABytes, VIndex); // zero (v1) or route tag (v2)
Inc(VIndex, 2);
Frip_addr := BytesToUInt32(ABytes, VIndex); // IP address
Inc(VIndex, 4);
Frip_mask := BytesToUInt32(ABytes, VIndex); // zero (v1) or subnet mask (v2)
Inc(VIndex, 4);
Frip_next_hop := BytesToUInt32(ABytes, VIndex); // zero (v1) or next hop IP address (v2)
Inc(VIndex, 4);
Frip_metric := BytesToUInt32(ABytes, VIndex); // metric
Inc(VIndex, 4);
end;
procedure TIdRIPHdr.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
VBytes[VIndex] := Frip_cmd; // RIP command
Inc(VIndex);
VBytes[VIndex] := Frip_ver; // RIP version
Inc(VIndex);
CopyTIdUInt16(Frip_rd, VBytes, VIndex); // zero (v1) or routing domain (v2)
Inc(VIndex, 2);
CopyTIdUInt16(Frip_af, VBytes, VIndex); // address family
Inc(VIndex, 2);
CopyTIdUInt16(Frip_rt, VBytes, VIndex); // zero (v1) or route tag (v2)
Inc(VIndex, 2);
CopyTIdUInt32(Frip_addr, VBytes, VIndex); // IP address
Inc(VIndex, 4);
CopyTIdUInt32(Frip_mask, VBytes, VIndex); // zero (v1) or subnet mask (v2)
Inc(VIndex, 4);
CopyTIdUInt32(Frip_next_hop, VBytes, VIndex); // zero (v1) or next hop IP address (v2)
Inc(VIndex, 4);
CopyTIdUInt32(Frip_metric, VBytes, VIndex); // metric
Inc(VIndex, 4);
end;
{ TIdInAddr }
procedure TIdInAddr.CopyFrom(const ASource: TIdInAddr);
begin
s_l := ASource.s_l;
end;
{ TIdicmp6_un }
constructor TIdicmp6_un.Create;
begin
inherited Create;
SetBytesLen(4);
end;
function TIdicmp6_un.Geticmp6_un_data16(Index: Integer): UInt16;
begin
Result := 0;
case Index of
0 : Result := BytesToUInt16(FBuffer, 0);
1 : Result := BytesToUInt16(FBuffer, 2);
end;
end;
procedure TIdicmp6_un.Seticmp6_un_data16(Index: Integer; const Value: UInt16);
begin
case Index of
0 : CopyTIdUInt16(Value, FBuffer, 0);
1 : CopyTIdUInt16(Value, FBuffer, 2);
end;
end;
function TIdicmp6_un.Geticmp6_un_data32: UInt32;
begin
Result := BytesToUInt32(FBuffer, 0);
end;
procedure TIdicmp6_un.Seticmp6_un_data32(const Value: UInt32);
begin
CopyTIdUInt32(Value, FBuffer, 0);
end;
function TIdicmp6_un.Geticmp6_un_data8(Index: Integer): UInt8;
begin
Assert((Index>-1) and (Index<4), 'Out of range');
Result := FBuffer[Index];
end;
procedure TIdicmp6_un.Seticmp6_un_data8(Index: Integer; const Value: UInt8);
begin
Assert((Index>-1) and (Index<4), 'Out of range');
FBuffer[Index] := Value;
end;
function TIdicmp6_un.Geticmp6_data8: UInt8;
begin
Result := FBuffer[0];
end;
procedure TIdicmp6_un.Seticmp6_data8(const Value: UInt8);
begin
FBuffer[0] := Value;
end;
function TIdicmp6_un.Geticmp6_data16: UInt16;
begin
Result := BytesToUInt16(FBuffer, 0);
end;
procedure TIdicmp6_un.Seticmp6_data16(const Value: UInt16);
begin
CopyTIdUInt16(Value, FBuffer, 0);
end;
function TIdicmp6_un.Geticmp6_seq: UInt16;
begin
Result := Geticmp6_un_data16(1);
end;
procedure TIdicmp6_un.Seticmp6_seq(const Value: UInt16);
begin
Seticmp6_un_data16(1, Value);
end;
{ TIdicmp6_hdr }
constructor TIdicmp6_hdr.Create;
begin
inherited Create;
Fdata := TIdicmp6_un.Create;
end;
destructor TIdicmp6_hdr.Destroy;
begin
FreeAndNil(Fdata);
inherited Destroy;
end;
function TIdicmp6_hdr.GetBytesLen: UInt32;
begin
Result := inherited GetBytesLen + 4 + Fdata.BytesLen;
end;
procedure TIdicmp6_hdr.ReadStruct(const ABytes: TIdBytes; var VIndex: UInt32);
begin
inherited ReadStruct(ABytes, VIndex);
Ficmp6_type := ABytes[VIndex];
Inc(VIndex);
FIcmp6_code := ABytes[VIndex];
Inc(VIndex);
Ficmp6_cksum := BytesToUInt16(ABytes, VIndex);
Inc(VIndex, 2);
Fdata.ReadStruct(ABytes, VIndex);
end;
procedure TIdicmp6_hdr.WriteStruct(var VBytes: TIdBytes; var VIndex: UInt32);
begin
inherited WriteStruct(VBytes, VIndex);
VBytes[VIndex] := Ficmp6_type;
Inc(VIndex);
VBytes[VIndex] := FIcmp6_code;
Inc(VIndex);
CopyTIdUInt16(Ficmp6_cksum, VBytes, VIndex);
Inc(VIndex, 2);
Fdata.WriteStruct(VBytes, VIndex);
end;
end.
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