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< / style >
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< body >
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< pre style = "font-family:monospace;font-size:12pt" >
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< a name = "l1" > < / a > < span class = cF0 > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_MAX_PORT < / span > < span class = cFE > 65535< / span > < span class = cF0 >
< a name = "l2" > < / a >
< a name = "l3" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_SRTT_ALPHA < / span > < span class = cFE > 0< / span > < span class = cF0 > .< / span > < span class = cFE > 9< / span > < span class = cF0 >
< a name = "l4" > < / a >
< a name = "l5" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_RTO_BETA < / span > < span class = cFE > 2< / span > < span class = cF0 >
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< a name = "l6" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_RTO_MIN < / span > < span class = cFE > 0< / span > < span class = cF0 > .< / span > < span class = cFE > 2< / span > < span class = cF0 >
< a name = "l7" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_RTO_MAX < / span > < span class = cFE > 10< / span > < span class = cF0 >
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< a name = "l8" > < / a >
< a name = "l9" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_WINDOW_SIZE < / span > < span class = cFE > 8192< / span > < span class = cF0 >
< a name = "l10" > < / a >
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< a name = "l11" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_MSS < / span > < span class = cFE > 536< / span > < span class = cF0 > < / span > < span class = cF2 > // Max Segment Size default< / span > < span class = cF0 >
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< a name = "l12" > < / a >
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< a name = "l13" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_TIMEOUT < / span > < span class = cFE > 5000< / span > < span class = cF0 >
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< a name = "l14" > < / a >
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< a name = "l15" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_STATE_CLOSED < / span > < span class = cFE > 0< / span > < span class = cF0 >
< a name = "l16" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_STATE_LISTEN < / span > < span class = cFE > 1< / span > < span class = cF0 >
< a name = "l17" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_STATE_SYN_SENT < / span > < span class = cFE > 2< / span > < span class = cF0 >
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< a name = "l18" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_STATE_SYN_RECEIVED < / span > < span class = cFE > 3< / span > < span class = cF0 >
< a name = "l19" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_STATE_ESTABLISHED < / span > < span class = cFE > 4< / span > < span class = cF0 >
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< a name = "l20" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_STATE_FIN_WAIT1 < / span > < span class = cFE > 5< / span > < span class = cF0 >
< a name = "l21" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_STATE_FIN_WAIT2 < / span > < span class = cFE > 6< / span > < span class = cF0 >
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< a name = "l22" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_STATE_CLOSE_WAIT < / span > < span class = cFE > 7< / span > < span class = cF0 >
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< a name = "l23" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_STATE_CLOSING < / span > < span class = cFE > 8< / span > < span class = cF0 >
< a name = "l24" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_STATE_LAST_ACK < / span > < span class = cFE > 9< / span > < span class = cF0 >
< a name = "l25" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCP_STATE_TIME_WAIT < / span > < span class = cFE > 10< / span > < span class = cF0 >
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< a name = "l26" > < / a >
< a name = "l27" > < / a > < / span > < span class = cF2 > // TCP header flags. Test with Bt(), e.g. Bt(& flags, TCPf_RST)< / span > < span class = cF0 >
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< a name = "l28" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCPf_FIN < / span > < span class = cFE > 0< / span > < span class = cF0 >
< a name = "l29" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCPf_SYN < / span > < span class = cFE > 1< / span > < span class = cF0 >
< a name = "l30" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCPf_RST < / span > < span class = cFE > 2< / span > < span class = cF0 >
< a name = "l31" > < / a > < / span > < span class = cF2 > //#define TCPf_PSH< / span > < span class = cF0 > < / span > < span class = cF2 > 3 // most stacks don't implement PUSH.< / span > < span class = cF0 >
< a name = "l32" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCPf_ACK < / span > < span class = cFE > 4< / span > < span class = cF0 >
< a name = "l33" > < / a > < / span > < span class = cF2 > //#define TCPf_URG< / span > < span class = cF0 > < / span > < span class = cF2 > 5 // most stacks don't implement URGENT.< / span > < span class = cF0 >
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< a name = "l34" > < / a >
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< a name = "l35" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCPF_FIN (< / span > < span class = cFE > 1< / span > < span class = cF0 > < < TCPf_FIN)
< a name = "l36" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCPF_SYN (< / span > < span class = cFE > 1< / span > < span class = cF0 > < < TCPf_SYN)
< a name = "l37" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCPF_RST (< / span > < span class = cFE > 1< / span > < span class = cF0 > < < TCPf_RST)
< a name = "l38" > < / a > < / span > < span class = cF2 > //#define TCPF_PSH< / span > < span class = cF0 > < / span > < span class = cF2 > (1 < < TCPf_PSH) // most stacks don't implement PUSH.< / span > < span class = cF0 >
< a name = "l39" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > TCPF_ACK (< / span > < span class = cFE > 1< / span > < span class = cF0 > < < TCPf_ACK)
< a name = "l40" > < / a > < / span > < span class = cF2 > //#define TCPF_URG< / span > < span class = cF0 > < / span > < span class = cF2 > (1 < < TCPf_URG) // most stacks don't implement URGENT.< / span > < span class = cF0 >
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< a name = "l41" > < / a >
< a name = "l42" > < / a >
< a name = "l43" > < / a > < / span > < span class = cF1 > class< / span > < span class = cF0 > CTCPAckQueue:< / span > < span class = cF9 > CQueue< / span > < span class = cF0 >
< a name = "l44" > < / a > {
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< a name = "l45" > < / a > < / span > < span class = cF1 > F64< / span > < span class = cF0 > time_sent;
< a name = "l46" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > retries;
< a name = "l47" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > start_seq_num;
< a name = "l48" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > end_seq_num;
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< a name = "l49" > < / a >
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< a name = "l50" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > tcp_packet_size; < / span > < span class = cF2 > // Size of memory allocation of U8* tcp_packet.< / span > < span class = cF0 >
< a name = "l51" > < / a > < / span > < span class = cF1 > U8< / span > < span class = cF0 > *tcp_packet; < / span > < span class = cF2 > // Memory location of entire TCP Header + Data Payload.< / span > < span class = cF0 >
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< a name = "l52" > < / a > };
< a name = "l53" > < / a >
< a name = "l54" > < / a > < / span > < span class = cF2 > // stores packet data of incoming connect() requests,< / span > < span class = cF0 >
< a name = "l55" > < / a > < / span > < span class = cF2 > // local accept() will search queue for pending connections,< / span > < span class = cF0 >
< a name = "l56" > < / a > < / span > < span class = cF2 > // and use this data to send out notification connection was accepted.< / span > < span class = cF0 >
< a name = "l57" > < / a > < / span > < span class = cF1 > class< / span > < span class = cF0 > CTCPAcceptQueue:< / span > < span class = cF9 > CQueue< / span > < span class = cF0 >
< a name = "l58" > < / a > {
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< a name = "l59" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > segment_seq_num;
< a name = "l60" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > ipv4_address;
< a name = "l61" > < / a > < / span > < span class = cF9 > U16< / span > < span class = cF0 > port;
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< a name = "l62" > < / a > };
< a name = "l63" > < / a >
< a name = "l64" > < / a > < / span > < span class = cF1 > class< / span > < span class = cF0 > CTCPSocket
< a name = "l65" > < / a > {
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< a name = "l66" > < / a > CSocket *socket;
< a name = "l67" > < / a > < / span > < span class = cF1 > U8< / span > < span class = cF0 > state;
< a name = "l68" > < / a > < / span > < span class = cF9 > U64< / span > < span class = cF0 > timeout; < / span > < span class = cF2 > // timeout for socket calls. Initialized 0: non-blocking.< / span > < span class = cF0 >
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< a name = "l69" > < / a >
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< a name = "l70" > < / a > CSocketAddressStorage source_address; < / span > < span class = cF2 > // based on -> family, cast or assign to a var as IPV4/IPV6 CSocketAddress< / span > < span class = cF0 >
< a name = "l71" > < / a > CSocketAddressStorage destination_address;
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< a name = "l72" > < / a >
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< a name = "l73" > < / a > CTCPAckQueue *ack_queue; < / span > < span class = cF2 > // Sent TCP packets awaiting an ACK collect here to be retransmitted. CQueue head.< / span > < span class = cF0 >
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< a name = "l74" > < / a >
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< a name = "l75" > < / a > < / span > < span class = cF9 > U64< / span > < span class = cF0 > accept_queue_limit;
< a name = "l76" > < / a > CTCPAcceptQueue *accept_queue;
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< a name = "l77" > < / a >
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< a name = "l78" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > max_segment_size;
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< a name = "l79" > < / a >
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< a name = "l80" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > first_unacked_seq; < / span > < span class = cF2 > // SEQ number of first unacknowledged octet< / span > < span class = cF0 >
< a name = "l81" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > next_send_seq_num;
< a name = "l82" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > next_recv_seq_num;
< a name = "l83" > < / a > < / span > < span class = cF1 > F64< / span > < span class = cF0 > srtt; < / span > < span class = cF2 > // Smoothed Round-Trip Time< / span > < span class = cF0 >
< a name = "l84" > < / a > < / span > < span class = cF1 > F64< / span > < span class = cF0 > connection_time;
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< a name = "l85" > < / a >
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< a name = "l86" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > receive_window;< / span > < span class = cF2 > // allowed # of unacknowledged incoming octets< / span > < span class = cF0 >
< a name = "l87" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > send_window; < / span > < span class = cF2 > // allowed # of unacknowledged outgoing octets< / span > < span class = cF0 >
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< a name = "l88" > < / a >
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< a name = "l89" > < / a > < / span > < span class = cF9 > I64< / span > < span class = cF0 > write_position; < / span > < span class = cF2 > // position in RX buffer to write incoming octets< / span > < span class = cF0 >
< a name = "l90" > < / a > < / span > < span class = cF9 > I64< / span > < span class = cF0 > read_position; < / span > < span class = cF2 > // position in RX buffer Socket calls have read up to< / span > < span class = cF0 >
< a name = "l91" > < / a > < / span > < span class = cF9 > I64< / span > < span class = cF0 > receive_buffer_size;
< a name = "l92" > < / a > < / span > < span class = cF1 > U8< / span > < span class = cF0 > *receive_buffer;
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< a name = "l93" > < / a > };
< a name = "l94" > < / a >
< a name = "l95" > < / a >
< a name = "l96" > < / a > < / span > < span class = cF1 > class< / span > < span class = cF0 > CTCPTreeQueue:< / span > < span class = cF9 > CQueue< / span > < span class = cF0 >
< a name = "l97" > < / a > {
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< a name = "l98" > < / a > CTCPSocket *socket;
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< a name = "l99" > < / a > };
< a name = "l100" > < / a >
< a name = "l101" > < / a > < / span > < span class = cF1 > class< / span > < span class = cF0 > CTCPTreeNode:CBST
< a name = "l102" > < / a > {
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< a name = "l103" > < / a > CTCPTreeQueue *queue;
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< a name = "l104" > < / a > };
< a name = "l105" > < / a >
< a name = "l106" > < / a > < / span > < span class = cF1 > class< / span > < span class = cF0 > CTCPRepEntry:< / span > < span class = cF9 > CQueue< / span > < span class = cF0 >
< a name = "l107" > < / a > {
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< a name = "l108" > < / a > CTCPTreeNode *node;
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< a name = "l109" > < / a > };
< a name = "l110" > < / a >
< a name = "l111" > < / a >
< a name = "l112" > < / a > < / span > < span class = cF1 > class< / span > < span class = cF0 > CTCPHeader
< a name = "l113" > < / a > {
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< a name = "l114" > < / a > < / span > < span class = cF9 > U16< / span > < span class = cF0 > source_port;
< a name = "l115" > < / a > < / span > < span class = cF9 > U16< / span > < span class = cF0 > destination_port;
< a name = "l116" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > seq_num;
< a name = "l117" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > ack_num;
< a name = "l118" > < / a > < / span > < span class = cF1 > U8< / span > < span class = cF0 > data_offset;
< a name = "l119" > < / a > < / span > < span class = cF1 > U8< / span > < span class = cF0 > flags;
< a name = "l120" > < / a > < / span > < span class = cF9 > U16< / span > < span class = cF0 > window_size;
< a name = "l121" > < / a > < / span > < span class = cF9 > U16< / span > < span class = cF0 > checksum;
< a name = "l122" > < / a > < / span > < span class = cF9 > U16< / span > < span class = cF0 > urgent_pointer;
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< a name = "l123" > < / a > };
< a name = "l124" > < / a >
< a name = "l125" > < / a > < / span > < span class = cF1 > class< / span > < span class = cF0 > CTCPPseudoHeader
< a name = "l126" > < / a > {
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< a name = "l127" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > source_address;
< a name = "l128" > < / a > < / span > < span class = cF9 > U32< / span > < span class = cF0 > destination_address;
< a name = "l129" > < / a > < / span > < span class = cF1 > U8< / span > < span class = cF0 > zeros;
< a name = "l130" > < / a > < / span > < span class = cF1 > U8< / span > < span class = cF0 > protocol;
< a name = "l131" > < / a > < / span > < span class = cF9 > U16< / span > < span class = cF0 > tcp_length; < / span > < span class = cF2 > // length of TCP headers & payload< / span > < span class = cF0 >
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< a name = "l132" > < / a > };
< a name = "l133" > < / a >
< a name = "l134" > < / a > < / span > < span class = cF1 > class< / span > < span class = cF0 > CTCPGlobals
< a name = "l135" > < / a > {
< a name = "l136" > < / a >
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< a name = "l137" > < / a > CTCPTreeNode *bound_socket_tree;
< a name = "l138" > < / a > < / span > < span class = cF9 > U16< / span > < span class = cF0 > next_source_port;
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< a name = "l139" > < / a >
< a name = "l140" > < / a > } tcp_globals;
< a name = "l141" > < / a >
< / span > < / pre > < / body >
< / html >
