[1740] | 1 | //////////////////////////////////////////////////////////////////////////////// |
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| 2 | // Copyright (c) 2004 Xilinx, Inc. All rights reserved. |
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| 3 | // |
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| 4 | // Xilinx, Inc. |
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| 5 | // XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A |
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| 6 | // COURTESY TO YOU. BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS |
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| 7 | // ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION OR |
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| 8 | // STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION |
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| 9 | // IS FREE FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE |
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| 10 | // FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION. |
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| 11 | // XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO |
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| 12 | // THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO |
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| 13 | // ANY WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE |
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| 14 | // FROM CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY |
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| 15 | // AND FITNESS FOR A PARTICULAR PURPOSE. |
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| 16 | // |
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| 17 | // File : tcp.h |
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| 18 | // Date : 2002, March 20. |
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| 19 | // Author : Sathya Thammanur |
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| 20 | // Company: Xilinx |
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| 21 | // Group : Emerging Software Technologies |
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| 22 | // |
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| 23 | // Summary: |
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| 24 | // Header file for TCP |
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| 25 | // |
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| 26 | // $Id: tcp.h,v 1.2.8.6 2005/11/15 23:41:10 salindac Exp $ |
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| 27 | // |
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| 28 | //////////////////////////////////////////////////////////////////////////////// |
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| 29 | |
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[1749] | 30 | //////////////////////////////////////////////////////////////////////////////// |
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| 31 | // see copyright.txt for Rice University/Mango Communications modifications |
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| 32 | //////////////////////////////////////////////////////////////////////////////// |
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| 33 | |
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[1740] | 34 | #ifndef _TCP_H |
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| 35 | #define _TCP_H |
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| 36 | |
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| 37 | #ifdef __cplusplus |
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| 38 | extern "C" { |
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| 39 | #endif |
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| 40 | |
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[1745] | 41 | #include <xilnet_ip.h> |
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[1740] | 42 | #include <xilnet_config.h> |
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| 43 | |
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| 44 | #define TCP_HDR_LEN 0x05 /* hlen in no.of 32-bit words */ |
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| 45 | #define IP_PROTO_TCP 0x06 /* protocol field in ip header */ |
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| 46 | #define TCP_PORT 8080 /* tcp port for web server */ |
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| 47 | |
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| 48 | struct xilnet_tcp_hdr { |
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| 49 | unsigned short src_port; |
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| 50 | unsigned short dst_port; |
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| 51 | unsigned int seq_no; |
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| 52 | unsigned int ack_no; |
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| 53 | unsigned short hdr_len:4, |
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| 54 | reserved:6, |
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| 55 | urg:1, |
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| 56 | ack:1, |
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| 57 | psh:1, |
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| 58 | rst:1, |
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| 59 | syn:1, |
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| 60 | fin:1; |
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| 61 | unsigned char window_size[2]; |
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| 62 | unsigned short check_sum; |
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| 63 | unsigned short urg_ptr; |
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| 64 | }; |
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| 65 | |
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| 66 | // tcp flags |
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| 67 | #define TCP_FIN 0x01 |
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| 68 | #define TCP_SYN 0x02 |
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| 69 | #define TCP_RST 0x04 |
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| 70 | #define TCP_PSH 0x08 |
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| 71 | #define TCP_ACK 0x10 |
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| 72 | #define TCP_URG 0x20 |
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| 73 | |
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| 74 | // offsets for fields in tcp pkt |
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| 75 | #define TCP_FLAGS_OFF 0x0d |
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| 76 | #define TCP_DEST_OFF 0x02 |
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| 77 | #define TCP_SRC_OFF 0x0 |
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| 78 | #define TCP_SEQ_OFF 0x04 |
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| 79 | #define TCP_ACKSEQ_OFF 0x08 |
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| 80 | #define TCP_HLEN_OFF 0x0c |
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| 81 | #define TCP_CHECK_OFF 0x10 |
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| 82 | #define TCP_WND_OFF 0xe |
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| 83 | #define TCP_URGPTR_OFF 0x12 |
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| 84 | |
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| 85 | // tcp mss max seg size |
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| 86 | #define TCP_MSS (LINK_HDR_LEN - 40) |
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| 87 | #define TCP_WND_HIGH (TCP_MSS >> 8) |
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| 88 | #define TCP_WND_LOW (TCP_MSS & 0xff) |
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| 89 | |
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| 90 | // tcp states |
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| 91 | enum { |
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| 92 | TCP_CLOSED = 1, |
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| 93 | TCP_LISTEN, |
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| 94 | TCP_SYN_RCVD, |
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| 95 | TCP_SYN_SENT, |
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| 96 | TCP_ESTABLISHED, |
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| 97 | TCP_CLOSE_WAIT, |
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| 98 | TCP_LAST_ACK, |
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| 99 | TCP_FIN_WAIT1, |
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| 100 | TCP_FIN_WAIT2, |
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| 101 | TCP_CLOSING, |
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| 102 | TCP_TIME_WAIT, |
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| 103 | }; |
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| 104 | |
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| 105 | // tcp conn management |
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| 106 | |
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| 107 | struct xilnet_tcp_conn { |
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| 108 | unsigned short src_port; |
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| 109 | unsigned short dst_port; |
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| 110 | unsigned char src_ip[IP_VERSION]; |
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| 111 | unsigned char dst_ip[IP_VERSION]; |
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| 112 | unsigned char state; |
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| 113 | int seqno; |
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| 114 | int ack_seqno; |
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| 115 | int exp_acknum; |
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| 116 | int fd; // socket descriptor into xsock_sockets table |
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| 117 | }; |
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| 118 | |
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| 119 | extern struct xilnet_tcp_conn xilnet_tcp_conns[MAX_TCP_CONNS]; |
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| 120 | |
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| 121 | extern void xilnet_tcp_init_conns(); |
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| 122 | |
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| 123 | #ifdef __cplusplus |
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| 124 | } |
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| 125 | #endif |
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| 126 | |
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| 127 | #endif /* _TCP_H */ |
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