[mirror_edk2.git] / MdeModulePkg / Universal / Network / Tcp4Dxe / Tcp4Proto.h

/** @file\r
  Tcp Protocol header file.\r
\r
Copyright (c) 2005 - 2006, Intel Corporation<BR>\r
All rights reserved. This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php<BR>\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#ifndef _TCP4_PROTO_H_\r
#define _TCP4_PROTO_H_\r
\r
typedef struct _TCP_CB  TCP_CB;\r
\r
#include "Tcp4Driver.h"\r
#include "Socket.h"\r
#include "Tcp4Option.h"\r
\r
\r
\r
///\r
/// Tcp states, Don't change their order, it is used as\r
/// index to mTcpOutFlag and other macros\r
///\r
typedef enum {\r
  TCP_CLOSED      = 0,\r
  TCP_LISTEN,\r
  TCP_SYN_SENT,\r
  TCP_SYN_RCVD,\r
  TCP_ESTABLISHED,\r
  TCP_FIN_WAIT_1,\r
  TCP_FIN_WAIT_2,\r
  TCP_CLOSING,\r
  TCP_TIME_WAIT,\r
  TCP_CLOSE_WAIT,\r
  TCP_LAST_ACK\r
} TCP_STATES;\r
\r
///\r
/// Flags in the TCP header\r
///\r
typedef enum {\r
\r
  TCP_FLG_FIN     = 0x01,\r
  TCP_FLG_SYN     = 0x02,\r
  TCP_FLG_RST     = 0x04,\r
  TCP_FLG_PSH     = 0x08,\r
  TCP_FLG_ACK     = 0x10,\r
  TCP_FLG_URG     = 0x20,\r
  \r
  //\r
  // mask for all the flags\r
  //\r
  TCP_FLG_FLAG    = 0x3F  \r
} TCP_HEADER_FLAG;\r
\r
typedef enum {\r
\r
  TCP_CONNECT_REFUSED     = -1, ///< TCP error status\r
  TCP_CONNECT_RESET       = -2, ///< TCP error status\r
  TCP_CONNECT_CLOSED      = -3, ///< TCP error status\r
\r
  //\r
  // Current congestion status as suggested by RFC3782.\r
  //\r
  TCP_CONGEST_RECOVER     = 1,  ///< During the NewReno fast recovery\r
  TCP_CONGEST_LOSS        = 2,  ///< Retxmit because of retxmit time out\r
  TCP_CONGEST_OPEN        = 3,  ///< TCP is opening its congestion window\r
\r
  //\r
  // TCP control flags\r
  //\r
  TCP_CTRL_NO_NAGLE       = 0x0001, ///< Disable Nagle algorithm\r
  TCP_CTRL_NO_KEEPALIVE   = 0x0002, ///< Disable keepalive timer\r
  TCP_CTRL_NO_WS          = 0x0004, ///< Disable window scale option\r
  TCP_CTRL_RCVD_WS        = 0x0008, ///< Received a wnd scale option in syn\r
  TCP_CTRL_NO_TS          = 0x0010, ///< Disable Timestamp option\r
  TCP_CTRL_RCVD_TS        = 0x0020, ///< Received a Timestamp option in syn\r
  TCP_CTRL_SND_TS         = 0x0040, ///< Send Timestamp option to remote\r
  TCP_CTRL_SND_URG        = 0x0080, ///< In urgent send mode\r
  TCP_CTRL_RCVD_URG       = 0x0100, ///< In urgent receive mode\r
  TCP_CTRL_SND_PSH        = 0x0200, ///< In PUSH send mode\r
  TCP_CTRL_FIN_SENT       = 0x0400, ///< FIN is sent\r
  TCP_CTRL_FIN_ACKED      = 0x0800, ///< FIN is ACKed.\r
  TCP_CTRL_TIMER_ON       = 0x1000, ///< At least one of the timer is on\r
  TCP_CTRL_RTT_ON         = 0x2000, ///< The RTT measurement is on\r
  TCP_CTRL_ACK_NOW        = 0x4000, ///< Send the ACK now, don't delay\r
\r
  //\r
  // Timer related values\r
  //\r
  TCP_TIMER_CONNECT       = 0,                  ///< Connection establishment timer\r
  TCP_TIMER_REXMIT        = 1,                  ///< Retransmit timer\r
  TCP_TIMER_PROBE         = 2,                  ///< Window probe timer\r
  TCP_TIMER_KEEPALIVE     = 3,                  ///< Keepalive timer\r
  TCP_TIMER_FINWAIT2      = 4,                  ///< FIN_WAIT_2 timer\r
  TCP_TIMER_2MSL          = 5,                  ///< TIME_WAIT tiemr\r
  TCP_TIMER_NUMBER        = 6,                  ///< The total number of TCP timer.\r
  TCP_TICK                = 200,                ///< Every TCP tick is 200ms\r
  TCP_TICK_HZ             = 5,                  ///< The frequence of TCP tick\r
  TCP_RTT_SHIFT           = 3,                  ///< SRTT & RTTVAR scaled by 8\r
  TCP_RTO_MIN             = TCP_TICK_HZ,        ///< The minium value of RTO\r
  TCP_RTO_MAX             = (TCP_TICK_HZ * 60), ///< The maxium value of RTO\r
  TCP_FOLD_RTT            = 4,                  ///< Timeout threshod to fold RTT\r
\r
  //\r
  // Default values for some timers\r
  //\r
  TCP_MAX_LOSS            = 12,                          ///< Default max times to retxmit\r
  TCP_KEEPALIVE_IDLE_MIN  = (TCP_TICK_HZ * 60 * 60 * 2), ///< First keep alive\r
  TCP_KEEPALIVE_PERIOD    = (TCP_TICK_HZ * 60),\r
  TCP_MAX_KEEPALIVE       = 8,\r
  TCP_FIN_WAIT2_TIME      = (2 * TCP_TICK_HZ),\r
  TCP_TIME_WAIT_TIME      = (2 * TCP_TICK_HZ),\r
  TCP_PAWS_24DAY          = (24 * 24 * 60 * 60 * TCP_TICK_HZ),\r
  TCP_CONNECT_TIME        = (75 * TCP_TICK_HZ),\r
\r
  //\r
  // The header space to be reserved before TCP data to accomodate :\r
  // 60byte IP head + 60byte TCP head + link layer head\r
  //\r
  TCP_MAX_HEAD            = 192,\r
\r
  //\r
  // Value ranges for some control option\r
  //\r
  TCP_RCV_BUF_SIZE        = (2 * 1024 * 1024),\r
  TCP_RCV_BUF_SIZE_MIN    = (8 * 1024),\r
  TCP_SND_BUF_SIZE        = (2 * 1024 * 1024),\r
  TCP_SND_BUF_SIZE_MIN    = (8 * 1024),\r
  TCP_BACKLOG             = 10,\r
  TCP_BACKLOG_MIN         = 5,\r
  TCP_MAX_LOSS_MIN        = 6,\r
  TCP_CONNECT_TIME_MIN    = (60 * TCP_TICK_HZ),\r
  TCP_MAX_KEEPALIVE_MIN   = 4,\r
  TCP_KEEPALIVE_IDLE_MAX  = (TCP_TICK_HZ * 60 * 60 * 4),\r
  TCP_KEEPALIVE_PERIOD_MIN= (TCP_TICK_HZ * 30),\r
  TCP_FIN_WAIT2_TIME_MAX  = (4 * TCP_TICK_HZ),\r
  TCP_TIME_WAIT_TIME_MAX  = (60 * TCP_TICK_HZ)\r
} TCP_MISC_VALUES;\r
\r
///\r
/// TCP segmentation data\r
///\r
typedef struct _TCP_SEG {\r
  TCP_SEQNO Seq;  ///< Starting sequence number\r
  TCP_SEQNO End;  ///< The sequence of the last byte + 1, include SYN/FIN. End-Seq = SEG.LEN\r
  TCP_SEQNO Ack;  ///< ACK field in the segment\r
  UINT8     Flag; ///< TCP header flags\r
  UINT16    Urg;  ///< Valid if URG flag is set.\r
  UINT32    Wnd;  ///< TCP window size field\r
} TCP_SEG;\r
\r
///\r
/// Network endpoint, IP+Port structure\r
///\r
typedef struct _TCP_PEER {\r
  UINT32      Ip;   ///< IP address, network byte order\r
  TCP_PORTNO  Port; ///< Port number, network byte order\r
} TCP_PEER;\r
\r
///\r
/// TCP control block, it includes various states\r
///\r
struct _TCP_CB {\r
  LIST_ENTRY        List;     ///< Back and forward link entry\r
  TCP_CB            *Parent;  ///< The parent TCP_CB structure\r
\r
  SOCKET            *Sk;      ///< The socket it controled.\r
  TCP_PEER          LocalEnd; ///< Local endpoint\r
  TCP_PEER          RemoteEnd;///< Remote endpoint\r
\r
  LIST_ENTRY        SndQue;   ///< Retxmission queue\r
  LIST_ENTRY        RcvQue;   ///< Reassemble queue\r
  UINT32            CtrlFlag; ///< Control flags, such as NO_NAGLE\r
  INT32             Error;    ///< Soft error status, such as TCP_CONNECT_RESET\r
\r
  //\r
  // RFC793 and RFC1122 defined variables\r
  //\r
  UINT8             State;      ///< TCP state, such as SYN_SENT, LISTEN\r
  UINT8             DelayedAck; ///< Number of delayed ACKs\r
  UINT16            HeadSum;    ///< Checksum of the fixed parts of pesudo\r
                                ///< header: Src IP, Dst IP, 0, Protocol,\r
                                ///< not include the TCP length.\r
\r
  TCP_SEQNO         Iss;        ///< Initial Sending Sequence\r
  TCP_SEQNO         SndUna;     ///< First unacknowledged data\r
  TCP_SEQNO         SndNxt;     ///< Next data sequence to send.\r
  TCP_SEQNO         SndPsh;     ///< Send PUSH point\r
  TCP_SEQNO         SndUp;      ///< Send urgent point\r
  UINT32            SndWnd;     ///< Window advertised by the remote peer\r
  UINT32            SndWndMax;  ///< Max send window advertised by the peer\r
  TCP_SEQNO         SndWl1;     ///< Seq number used for last window update\r
  TCP_SEQNO         SndWl2;     ///< Ack no of last window update\r
  UINT16            SndMss;     ///< Max send segment size\r
  TCP_SEQNO         RcvNxt;     ///< Next sequence no to receive\r
  UINT32            RcvWnd;     ///< Window advertised by the local peer\r
  TCP_SEQNO         RcvWl2;     ///< The RcvNxt (or ACK) of last window update.\r
                                ///< It is necessary because of delayed ACK\r
\r
  TCP_SEQNO         RcvUp;                   ///< Urgent point;\r
  TCP_SEQNO         Irs;                     ///< Initial Receiving Sequence\r
  UINT16            RcvMss;                  ///< Max receive segment size\r
  UINT16            EnabledTimer;            ///< Which timer is currently enabled\r
  UINT32            Timer[TCP_TIMER_NUMBER]; ///< When the timer will expire\r
  INT32             NextExpire;  ///< Count down offset for the nearest timer\r
  UINT32            Idle;        ///< How long the connection is in idle\r
  UINT32            ProbeTime;   ///< The time out value for current window prober\r
\r
  //\r
  // RFC1323 defined variables, about window scale,\r
  // timestamp and PAWS\r
  //\r
  UINT8             SndWndScale;  ///< Wndscale received from the peer\r
  UINT8             RcvWndScale;  ///< Wndscale used to scale local buffer\r
  UINT32            TsRecent;     ///< TsRecent to echo to the remote peer\r
  UINT32            TsRecentAge;  ///< When this TsRecent is updated\r
\r
  //\r
  // RFC2988 defined variables. about RTT measurement\r
  //\r
  TCP_SEQNO         RttSeq;     ///< The seq of measured segment now\r
  UINT32            RttMeasure; ///< Currently measured RTT in heart beats\r
  UINT32            SRtt;       ///< Smoothed RTT, scaled by 8\r
  UINT32            RttVar;     ///< RTT variance, scaled by 8\r
  UINT32            Rto;        ///< Current RTO, not scaled\r
\r
  //\r
  // RFC2581, and 3782 variables.\r
  // Congestion control + NewReno fast recovery.\r
  //\r
  UINT32            CWnd;         ///< Sender's congestion window\r
  UINT32            Ssthresh;     ///< Slow start threshold.\r
  TCP_SEQNO         Recover;      ///< Recover point for NewReno\r
  UINT16            DupAck;       ///< Number of duplicate ACKs\r
  UINT8             CongestState; ///< The current congestion state(RFC3782)\r
  UINT8             LossTimes;    ///< Number of retxmit timeouts in a row\r
  TCP_SEQNO         LossRecover;  ///< Recover point for retxmit\r
\r
  //\r
  // configuration parameters, for EFI_TCP4_PROTOCOL specification\r
  //\r
  UINT32            KeepAliveIdle;   ///< Idle time before sending first probe\r
  UINT32            KeepAlivePeriod; ///< Interval for subsequent keep alive probe\r
  UINT8             MaxKeepAlive;    ///< Maxium keep alive probe times.\r
  UINT8             KeepAliveProbes; ///< The number of keep alive probe.\r
  UINT16            MaxRexmit;       ///< The maxium number of retxmit before abort\r
  UINT32            FinWait2Timeout; ///< The FIN_WAIT_2 time out\r
  UINT32            TimeWaitTimeout; ///< The TIME_WAIT time out\r
  UINT32            ConnectTimeout;  ///< The connect establishment time out\r
\r
  //\r
  // configuration for tcp provided by user\r
  //\r
  BOOLEAN           UseDefaultAddr;\r
  UINT8             Tos;\r
  UINT8             Ttl;\r
  EFI_IPv4_ADDRESS  SubnetMask;\r
\r
  IP_IO_IP_INFO     *IpInfo;        ///<pointer reference to Ip used to send pkt\r
};\r
\r
extern LIST_ENTRY     mTcpRunQue;\r
extern LIST_ENTRY     mTcpListenQue;\r
extern TCP_SEQNO      mTcpGlobalIss;\r
extern UINT32         mTcpTick;\r
\r
///\r
/// TCP_CONNECTED: both ends have synchronized their ISN.\r
///\r
#define TCP_CONNECTED(state)  ((state) > TCP_SYN_RCVD)\r
\r
#define TCP_FIN_RCVD(State) \\r
    (((State) == TCP_CLOSE_WAIT) || \\r
    ((State) == TCP_LAST_ACK) || \\r
    ((State) == TCP_CLOSING) || \\r
    ((State) == TCP_TIME_WAIT))\r
\r
#define TCP_LOCAL_CLOSED(State) \\r
      (((State) == TCP_FIN_WAIT_1) || \\r
      ((State) == TCP_FIN_WAIT_2) || \\r
      ((State) == TCP_CLOSING) || \\r
      ((State) == TCP_TIME_WAIT) || \\r
      ((State) == TCP_LAST_ACK))\r
\r
//\r
// Get the TCP_SEG point from a net buffer's ProtoData\r
//\r
#define TCPSEG_NETBUF(NBuf) ((TCP_SEG *) ((NBuf)->ProtoData))\r
\r
//\r
// macros to compare sequence no\r
//\r
#define TCP_SEQ_LT(SeqA, SeqB)  ((INT32) ((SeqA) - (SeqB)) < 0)\r
#define TCP_SEQ_LEQ(SeqA, SeqB) ((INT32) ((SeqA) - (SeqB)) <= 0)\r
#define TCP_SEQ_GT(SeqA, SeqB)  ((INT32) ((SeqB) - (SeqA)) < 0)\r
#define TCP_SEQ_GEQ(SeqA, SeqB) ((INT32) ((SeqB) - (SeqA)) <= 0)\r
\r
//\r
// TCP_SEQ_BETWEEN return whether b <= m <= e\r
//\r
#define TCP_SEQ_BETWEEN(b, m, e)  ((e) - (b) >= (m) - (b))\r
\r
//\r
// TCP_SUB_SEQ returns Seq1 - Seq2. Make sure Seq1 >= Seq2\r
//\r
#define TCP_SUB_SEQ(Seq1, Seq2)     ((UINT32) ((Seq1) - (Seq2)))\r
\r
//\r
// Check whether Flag is on\r
//\r
#define TCP_FLG_ON(Value, Flag)     ((BOOLEAN) (((Value) & (Flag)) != 0))\r
\r
//\r
// Set and Clear operation on a Flag\r
//\r
#define TCP_SET_FLG(Value, Flag)    ((Value) |= (Flag))\r
#define TCP_CLEAR_FLG(Value, Flag)  ((Value) &= ~(Flag))\r
\r
//\r
// Test whether two peers are equal\r
//\r
#define TCP_PEER_EQUAL(Pa, Pb) \\r
  (((Pa)->Ip == (Pb)->Ip) && ((Pa)->Port == (Pb)->Port))\r
\r
//\r
// Test whether Pa matches Pb, or Pa is more specific\r
// than pb. Zero means wildcard.\r
//\r
#define TCP_PEER_MATCH(Pa, Pb) \\r
    ((((Pb)->Ip == 0) || ((Pb)->Ip == (Pa)->Ip)) && \\r
    (((Pb)->Port == 0) || ((Pb)->Port == (Pa)->Port)))\r
\r
#define TCP_TIMER_ON(Flag, Timer)     ((Flag) & (1 << (Timer)))\r
#define TCP_SET_TIMER(Flag, Timer)    ((Flag) = (UINT16) ((Flag) | (1 << (Timer))))\r
#define TCP_CLEAR_TIMER(Flag, Timer)  ((Flag) = (UINT16) ((Flag) & (~(1 << (Timer)))))\r
\r
#define TCP_TIME_LT(Ta, Tb)           ((INT32) ((Ta) - (Tb)) < 0)\r
#define TCP_TIME_LEQ(Ta, Tb)          ((INT32) ((Ta) - (Tb)) <= 0)\r
#define TCP_SUB_TIME(Ta, Tb)          ((UINT32) ((Ta) - (Tb)))\r
\r
#define TCP_MAX_WIN                   0xFFFFU\r
\r
typedef\r
VOID\r
(*TCP_TIMER_HANDLER) (\r
  IN OUT TCP_CB *Tcb\r
  );\r
\r
#endif\r
Commit	Line	Data
83cbd279	1	/** @file\r
dab714aa	2	Tcp Protocol header file.\r
dab714aa	3	\r
dfc1f033	4	Copyright (c) 2005 - 2006, Intel Corporation<BR>\r
83cbd279	5	All rights reserved. This program and the accompanying materials\r
	6	are licensed and made available under the terms and conditions of the BSD License\r
	7	which accompanies this distribution. The full text of the license may be found at\r
dfc1f033	8	http://opensource.org/licenses/bsd-license.php<BR>\r
83cbd279	9	\r
	10	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	\r
83cbd279	13	**/\r
	14	\r
	15	#ifndef _TCP4_PROTO_H_\r
	16	#define _TCP4_PROTO_H_\r
	17	\r
	18	typedef struct _TCP_CB TCP_CB;\r
	19	\r
	20	#include "Tcp4Driver.h"\r
	21	#include "Socket.h"\r
	22	#include "Tcp4Option.h"\r
	23	\r
dfc1f033	24	\r
	25	\r
	26	///\r
	27	/// Tcp states, Don't change their order, it is used as\r
	28	/// index to mTcpOutFlag and other macros\r
	29	///\r
85511ddf	30	typedef enum {\r
83cbd279	31	TCP_CLOSED = 0,\r
	32	TCP_LISTEN,\r
	33	TCP_SYN_SENT,\r
	34	TCP_SYN_RCVD,\r
	35	TCP_ESTABLISHED,\r
	36	TCP_FIN_WAIT_1,\r
	37	TCP_FIN_WAIT_2,\r
	38	TCP_CLOSING,\r
	39	TCP_TIME_WAIT,\r
	40	TCP_CLOSE_WAIT,\r
	41	TCP_LAST_ACK\r
85511ddf	42	} TCP_STATES;\r
83cbd279	43	\r
dfc1f033	44	///\r
	45	/// Flags in the TCP header\r
	46	///\r
85511ddf	47	typedef enum {\r
83cbd279	48	\r
	49	TCP_FLG_FIN = 0x01,\r
	50	TCP_FLG_SYN = 0x02,\r
	51	TCP_FLG_RST = 0x04,\r
	52	TCP_FLG_PSH = 0x08,\r
	53	TCP_FLG_ACK = 0x10,\r
	54	TCP_FLG_URG = 0x20,\r
dfc1f033	55	\r
	56	//\r
	57	// mask for all the flags\r
	58	//\r
	59	TCP_FLG_FLAG = 0x3F \r
85511ddf	60	} TCP_HEADER_FLAG;\r
83cbd279	61	\r
85511ddf	62	typedef enum {\r
83cbd279	63	\r
dfc1f033	64	TCP_CONNECT_REFUSED = -1, ///< TCP error status\r
	65	TCP_CONNECT_RESET = -2, ///< TCP error status\r
	66	TCP_CONNECT_CLOSED = -3, ///< TCP error status\r
83cbd279	67	\r
	68	//\r
	69	// Current congestion status as suggested by RFC3782.\r
	70	//\r
dfc1f033	71	TCP_CONGEST_RECOVER = 1, ///< During the NewReno fast recovery\r
	72	TCP_CONGEST_LOSS = 2, ///< Retxmit because of retxmit time out\r
	73	TCP_CONGEST_OPEN = 3, ///< TCP is opening its congestion window\r
83cbd279	74	\r
	75	//\r
	76	// TCP control flags\r
	77	//\r
dfc1f033	78	TCP_CTRL_NO_NAGLE = 0x0001, ///< Disable Nagle algorithm\r
	79	TCP_CTRL_NO_KEEPALIVE = 0x0002, ///< Disable keepalive timer\r
	80	TCP_CTRL_NO_WS = 0x0004, ///< Disable window scale option\r
	81	TCP_CTRL_RCVD_WS = 0x0008, ///< Received a wnd scale option in syn\r
	82	TCP_CTRL_NO_TS = 0x0010, ///< Disable Timestamp option\r
	83	TCP_CTRL_RCVD_TS = 0x0020, ///< Received a Timestamp option in syn\r
	84	TCP_CTRL_SND_TS = 0x0040, ///< Send Timestamp option to remote\r
	85	TCP_CTRL_SND_URG = 0x0080, ///< In urgent send mode\r
	86	TCP_CTRL_RCVD_URG = 0x0100, ///< In urgent receive mode\r
	87	TCP_CTRL_SND_PSH = 0x0200, ///< In PUSH send mode\r
	88	TCP_CTRL_FIN_SENT = 0x0400, ///< FIN is sent\r
	89	TCP_CTRL_FIN_ACKED = 0x0800, ///< FIN is ACKed.\r
	90	TCP_CTRL_TIMER_ON = 0x1000, ///< At least one of the timer is on\r
	91	TCP_CTRL_RTT_ON = 0x2000, ///< The RTT measurement is on\r
	92	TCP_CTRL_ACK_NOW = 0x4000, ///< Send the ACK now, don't delay\r
83cbd279	93	\r
	94	//\r
	95	// Timer related values\r
	96	//\r
dfc1f033	97	TCP_TIMER_CONNECT = 0, ///< Connection establishment timer\r
	98	TCP_TIMER_REXMIT = 1, ///< Retransmit timer\r
	99	TCP_TIMER_PROBE = 2, ///< Window probe timer\r
	100	TCP_TIMER_KEEPALIVE = 3, ///< Keepalive timer\r
	101	TCP_TIMER_FINWAIT2 = 4, ///< FIN_WAIT_2 timer\r
	102	TCP_TIMER_2MSL = 5, ///< TIME_WAIT tiemr\r
	103	TCP_TIMER_NUMBER = 6, ///< The total number of TCP timer.\r
	104	TCP_TICK = 200, ///< Every TCP tick is 200ms\r
	105	TCP_TICK_HZ = 5, ///< The frequence of TCP tick\r
	106	TCP_RTT_SHIFT = 3, ///< SRTT & RTTVAR scaled by 8\r
	107	TCP_RTO_MIN = TCP_TICK_HZ, ///< The minium value of RTO\r
	108	TCP_RTO_MAX = (TCP_TICK_HZ * 60), ///< The maxium value of RTO\r
	109	TCP_FOLD_RTT = 4, ///< Timeout threshod to fold RTT\r
83cbd279	110	\r
83cbd279	111	//\r
dfc1f033	112	// Default values for some timers\r
83cbd279	113	//\r
dfc1f033	114	TCP_MAX_LOSS = 12, ///< Default max times to retxmit\r
	115	TCP_KEEPALIVE_IDLE_MIN = (TCP_TICK_HZ * 60 * 60 * 2), ///< First keep alive\r
	116	TCP_KEEPALIVE_PERIOD = (TCP_TICK_HZ * 60),\r
83cbd279	117	TCP_MAX_KEEPALIVE = 8,\r
dfc1f033	118	TCP_FIN_WAIT2_TIME = (2 * TCP_TICK_HZ),\r
	119	TCP_TIME_WAIT_TIME = (2 * TCP_TICK_HZ),\r
	120	TCP_PAWS_24DAY = (24 * 24 * 60 * 60 * TCP_TICK_HZ),\r
	121	TCP_CONNECT_TIME = (75 * TCP_TICK_HZ),\r
83cbd279	122	\r
	123	//\r
	124	// The header space to be reserved before TCP data to accomodate :\r
	125	// 60byte IP head + 60byte TCP head + link layer head\r
	126	//\r
	127	TCP_MAX_HEAD = 192,\r
	128	\r
	129	//\r
dfc1f033	130	// Value ranges for some control option\r
83cbd279	131	//\r
dfc1f033	132	TCP_RCV_BUF_SIZE = (2 * 1024 * 1024),\r
	133	TCP_RCV_BUF_SIZE_MIN = (8 * 1024),\r
	134	TCP_SND_BUF_SIZE = (2 * 1024 * 1024),\r
	135	TCP_SND_BUF_SIZE_MIN = (8 * 1024),\r
83cbd279	136	TCP_BACKLOG = 10,\r
	137	TCP_BACKLOG_MIN = 5,\r
	138	TCP_MAX_LOSS_MIN = 6,\r
dfc1f033	139	TCP_CONNECT_TIME_MIN = (60 * TCP_TICK_HZ),\r
83cbd279	140	TCP_MAX_KEEPALIVE_MIN = 4,\r
dfc1f033	141	TCP_KEEPALIVE_IDLE_MAX = (TCP_TICK_HZ * 60 * 60 * 4),\r
	142	TCP_KEEPALIVE_PERIOD_MIN= (TCP_TICK_HZ * 30),\r
	143	TCP_FIN_WAIT2_TIME_MAX = (4 * TCP_TICK_HZ),\r
	144	TCP_TIME_WAIT_TIME_MAX = (60 * TCP_TICK_HZ)\r
85511ddf	145	} TCP_MISC_VALUES;\r
83cbd279	146	\r
dfc1f033	147	///\r
	148	/// TCP segmentation data\r
	149	///\r
83cbd279	150	typedef struct _TCP_SEG {\r
dfc1f033	151	TCP_SEQNO Seq; ///< Starting sequence number\r
	152	TCP_SEQNO End; ///< The sequence of the last byte + 1, include SYN/FIN. End-Seq = SEG.LEN\r
	153	TCP_SEQNO Ack; ///< ACK field in the segment\r
	154	UINT8 Flag; ///< TCP header flags\r
	155	UINT16 Urg; ///< Valid if URG flag is set.\r
	156	UINT32 Wnd; ///< TCP window size field\r
83cbd279	157	} TCP_SEG;\r
83cbd279	158	\r
dfc1f033	159	///\r
	160	/// Network endpoint, IP+Port structure\r
	161	///\r
83cbd279	162	typedef struct _TCP_PEER {\r
dfc1f033	163	UINT32 Ip; ///< IP address, network byte order\r
dfc1f033	164	TCP_PORTNO Port; ///< Port number, network byte order\r
83cbd279	165	} TCP_PEER;\r
83cbd279	166	\r
dfc1f033	167	///\r
	168	/// TCP control block, it includes various states\r
	169	///\r
83cbd279	170	struct _TCP_CB {\r
dfc1f033	171	LIST_ENTRY List; ///< Back and forward link entry\r
dfc1f033	172	TCP_CB *Parent; ///< The parent TCP_CB structure\r
83cbd279	173	\r
dfc1f033	174	SOCKET *Sk; ///< The socket it controled.\r
	175	TCP_PEER LocalEnd; ///< Local endpoint\r
	176	TCP_PEER RemoteEnd;///< Remote endpoint\r
83cbd279	177	\r
dfc1f033	178	LIST_ENTRY SndQue; ///< Retxmission queue\r
	179	LIST_ENTRY RcvQue; ///< Reassemble queue\r
	180	UINT32 CtrlFlag; ///< Control flags, such as NO_NAGLE\r
	181	INT32 Error; ///< Soft error status, such as TCP_CONNECT_RESET\r
83cbd279	182	\r
	183	//\r
	184	// RFC793 and RFC1122 defined variables\r
	185	//\r
276dcc1b	186	UINT8 State; ///< TCP state, such as SYN_SENT, LISTEN\r
dfc1f033	187	UINT8 DelayedAck; ///< Number of delayed ACKs\r
	188	UINT16 HeadSum; ///< Checksum of the fixed parts of pesudo\r
	189	///< header: Src IP, Dst IP, 0, Protocol,\r
	190	///< not include the TCP length.\r
	191	\r
	192	TCP_SEQNO Iss; ///< Initial Sending Sequence\r
	193	TCP_SEQNO SndUna; ///< First unacknowledged data\r
	194	TCP_SEQNO SndNxt; ///< Next data sequence to send.\r
	195	TCP_SEQNO SndPsh; ///< Send PUSH point\r
	196	TCP_SEQNO SndUp; ///< Send urgent point\r
	197	UINT32 SndWnd; ///< Window advertised by the remote peer\r
	198	UINT32 SndWndMax; ///< Max send window advertised by the peer\r
	199	TCP_SEQNO SndWl1; ///< Seq number used for last window update\r
	200	TCP_SEQNO SndWl2; ///< Ack no of last window update\r
	201	UINT16 SndMss; ///< Max send segment size\r
	202	TCP_SEQNO RcvNxt; ///< Next sequence no to receive\r
	203	UINT32 RcvWnd; ///< Window advertised by the local peer\r
	204	TCP_SEQNO RcvWl2; ///< The RcvNxt (or ACK) of last window update.\r
	205	///< It is necessary because of delayed ACK\r
	206	\r
	207	TCP_SEQNO RcvUp; ///< Urgent point;\r
	208	TCP_SEQNO Irs; ///< Initial Receiving Sequence\r
	209	UINT16 RcvMss; ///< Max receive segment size\r
	210	UINT16 EnabledTimer; ///< Which timer is currently enabled\r
	211	UINT32 Timer[TCP_TIMER_NUMBER]; ///< When the timer will expire\r
	212	INT32 NextExpire; ///< Count down offset for the nearest timer\r
	213	UINT32 Idle; ///< How long the connection is in idle\r
	214	UINT32 ProbeTime; ///< The time out value for current window prober\r
83cbd279	215	\r
	216	//\r
	217	// RFC1323 defined variables, about window scale,\r
	218	// timestamp and PAWS\r
	219	//\r
dfc1f033	220	UINT8 SndWndScale; ///< Wndscale received from the peer\r
	221	UINT8 RcvWndScale; ///< Wndscale used to scale local buffer\r
	222	UINT32 TsRecent; ///< TsRecent to echo to the remote peer\r
	223	UINT32 TsRecentAge; ///< When this TsRecent is updated\r
83cbd279	224	\r
	225	//\r
	226	// RFC2988 defined variables. about RTT measurement\r
	227	//\r
dfc1f033	228	TCP_SEQNO RttSeq; ///< The seq of measured segment now\r
	229	UINT32 RttMeasure; ///< Currently measured RTT in heart beats\r
	230	UINT32 SRtt; ///< Smoothed RTT, scaled by 8\r
	231	UINT32 RttVar; ///< RTT variance, scaled by 8\r
	232	UINT32 Rto; ///< Current RTO, not scaled\r
83cbd279	233	\r
	234	//\r
	235	// RFC2581, and 3782 variables.\r
	236	// Congestion control + NewReno fast recovery.\r
	237	//\r
dfc1f033	238	UINT32 CWnd; ///< Sender's congestion window\r
	239	UINT32 Ssthresh; ///< Slow start threshold.\r
	240	TCP_SEQNO Recover; ///< Recover point for NewReno\r
	241	UINT16 DupAck; ///< Number of duplicate ACKs\r
	242	UINT8 CongestState; ///< The current congestion state(RFC3782)\r
	243	UINT8 LossTimes; ///< Number of retxmit timeouts in a row\r
	244	TCP_SEQNO LossRecover; ///< Recover point for retxmit\r
83cbd279	245	\r
	246	//\r
	247	// configuration parameters, for EFI_TCP4_PROTOCOL specification\r
	248	//\r
dfc1f033	249	UINT32 KeepAliveIdle; ///< Idle time before sending first probe\r
	250	UINT32 KeepAlivePeriod; ///< Interval for subsequent keep alive probe\r
	251	UINT8 MaxKeepAlive; ///< Maxium keep alive probe times.\r
	252	UINT8 KeepAliveProbes; ///< The number of keep alive probe.\r
	253	UINT16 MaxRexmit; ///< The maxium number of retxmit before abort\r
	254	UINT32 FinWait2Timeout; ///< The FIN_WAIT_2 time out\r
	255	UINT32 TimeWaitTimeout; ///< The TIME_WAIT time out\r
	256	UINT32 ConnectTimeout; ///< The connect establishment time out\r
83cbd279	257	\r
	258	//\r
	259	// configuration for tcp provided by user\r
	260	//\r
	261	BOOLEAN UseDefaultAddr;\r
a78d176c	262	UINT8 Tos;\r
a78d176c	263	UINT8 Ttl;\r
83cbd279	264	EFI_IPv4_ADDRESS SubnetMask;\r
83cbd279	265	\r
dfc1f033	266	IP_IO_IP_INFO *IpInfo; ///<pointer reference to Ip used to send pkt\r
83cbd279	267	};\r
83cbd279	268	\r
e48e37fc	269	extern LIST_ENTRY mTcpRunQue;\r
e48e37fc	270	extern LIST_ENTRY mTcpListenQue;\r
83cbd279	271	extern TCP_SEQNO mTcpGlobalIss;\r
	272	extern UINT32 mTcpTick;\r
	273	\r
dfc1f033	274	///\r
	275	/// TCP_CONNECTED: both ends have synchronized their ISN.\r
	276	///\r
83cbd279	277	#define TCP_CONNECTED(state) ((state) > TCP_SYN_RCVD)\r
	278	\r
	279	#define TCP_FIN_RCVD(State) \\r
	280	(((State) == TCP_CLOSE_WAIT) \|\| \\r
	281	((State) == TCP_LAST_ACK) \|\| \\r
	282	((State) == TCP_CLOSING) \|\| \\r
	283	((State) == TCP_TIME_WAIT))\r
	284	\r
	285	#define TCP_LOCAL_CLOSED(State) \\r
	286	(((State) == TCP_FIN_WAIT_1) \|\| \\r
	287	((State) == TCP_FIN_WAIT_2) \|\| \\r
	288	((State) == TCP_CLOSING) \|\| \\r
	289	((State) == TCP_TIME_WAIT) \|\| \\r
	290	((State) == TCP_LAST_ACK))\r
	291	\r
	292	//\r
	293	// Get the TCP_SEG point from a net buffer's ProtoData\r
	294	//\r
	295	#define TCPSEG_NETBUF(NBuf) ((TCP_SEG *) ((NBuf)->ProtoData))\r
	296	\r
	297	//\r
	298	// macros to compare sequence no\r
	299	//\r
	300	#define TCP_SEQ_LT(SeqA, SeqB) ((INT32) ((SeqA) - (SeqB)) < 0)\r
	301	#define TCP_SEQ_LEQ(SeqA, SeqB) ((INT32) ((SeqA) - (SeqB)) <= 0)\r
	302	#define TCP_SEQ_GT(SeqA, SeqB) ((INT32) ((SeqB) - (SeqA)) < 0)\r
	303	#define TCP_SEQ_GEQ(SeqA, SeqB) ((INT32) ((SeqB) - (SeqA)) <= 0)\r
	304	\r
	305	//\r
	306	// TCP_SEQ_BETWEEN return whether b <= m <= e\r
	307	//\r
	308	#define TCP_SEQ_BETWEEN(b, m, e) ((e) - (b) >= (m) - (b))\r
	309	\r
	310	//\r
	311	// TCP_SUB_SEQ returns Seq1 - Seq2. Make sure Seq1 >= Seq2\r
	312	//\r
	313	#define TCP_SUB_SEQ(Seq1, Seq2) ((UINT32) ((Seq1) - (Seq2)))\r
	314	\r
dab714aa	315	//\r
	316	// Check whether Flag is on\r
	317	//\r
83cbd279	318	#define TCP_FLG_ON(Value, Flag) ((BOOLEAN) (((Value) & (Flag)) != 0))\r
dab714aa	319	\r
	320	//\r
	321	// Set and Clear operation on a Flag\r
	322	//\r
83cbd279	323	#define TCP_SET_FLG(Value, Flag) ((Value) \|= (Flag))\r
	324	#define TCP_CLEAR_FLG(Value, Flag) ((Value) &= ~(Flag))\r
	325	\r
	326	//\r
dab714aa	327	// Test whether two peers are equal\r
83cbd279	328	//\r
	329	#define TCP_PEER_EQUAL(Pa, Pb) \\r
	330	(((Pa)->Ip == (Pb)->Ip) && ((Pa)->Port == (Pb)->Port))\r
	331	\r
	332	//\r
dab714aa	333	// Test whether Pa matches Pb, or Pa is more specific\r
83cbd279	334	// than pb. Zero means wildcard.\r
	335	//\r
	336	#define TCP_PEER_MATCH(Pa, Pb) \\r
	337	((((Pb)->Ip == 0) \|\| ((Pb)->Ip == (Pa)->Ip)) && \\r
	338	(((Pb)->Port == 0) \|\| ((Pb)->Port == (Pa)->Port)))\r
	339	\r
	340	#define TCP_TIMER_ON(Flag, Timer) ((Flag) & (1 << (Timer)))\r
	341	#define TCP_SET_TIMER(Flag, Timer) ((Flag) = (UINT16) ((Flag) \| (1 << (Timer))))\r
	342	#define TCP_CLEAR_TIMER(Flag, Timer) ((Flag) = (UINT16) ((Flag) & (~(1 << (Timer)))))\r
	343	\r
	344	#define TCP_TIME_LT(Ta, Tb) ((INT32) ((Ta) - (Tb)) < 0)\r
	345	#define TCP_TIME_LEQ(Ta, Tb) ((INT32) ((Ta) - (Tb)) <= 0)\r
	346	#define TCP_SUB_TIME(Ta, Tb) ((UINT32) ((Ta) - (Tb)))\r
	347	\r
	348	#define TCP_MAX_WIN 0xFFFFU\r
	349	\r
	350	typedef\r
	351	VOID\r
	352	(*TCP_TIMER_HANDLER) (\r
dab714aa	353	IN OUT TCP_CB *Tcb\r
83cbd279	354	);\r
83cbd279	355	\r
83cbd279	356	#endif\r