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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *  * Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  *  * Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in
     12  *    the documentation and/or other materials provided with the
     13  *    distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
     19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
     22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _NETINET_TCP_H
     30 #define _NETINET_TCP_H
     31 
     32 #include <sys/cdefs.h>
     33 #include <stdint.h>
     34 
     35 #define tcphdr __kernel_tcphdr
     36 #include <linux/tcp.h>
     37 #undef tcphdr
     38 
     39 __BEGIN_DECLS
     40 
     41 struct tcphdr {
     42   __extension__ union {
     43     struct {
     44       uint16_t th_sport;
     45       uint16_t th_dport;
     46       uint32_t th_seq;
     47       uint32_t th_ack;
     48       uint8_t th_x2:4;
     49       uint8_t th_off:4;
     50       uint8_t th_flags;
     51       uint16_t th_win;
     52       uint16_t th_sum;
     53       uint16_t th_urp;
     54     };
     55     struct {
     56       uint16_t source;
     57       uint16_t dest;
     58       uint32_t seq;
     59       uint32_t ack_seq;
     60       uint16_t res1:4;
     61       uint16_t doff:4;
     62       uint16_t fin:1;
     63       uint16_t syn:1;
     64       uint16_t rst:1;
     65       uint16_t psh:1;
     66       uint16_t ack:1;
     67       uint16_t urg:1;
     68       uint16_t res2:2;
     69       uint16_t window;
     70       uint16_t check;
     71       uint16_t urg_ptr;
     72     };
     73   };
     74 };
     75 
     76 #define TH_FIN 0x01
     77 #define TH_SYN 0x02
     78 #define TH_RST 0x04
     79 #define TH_PUSH 0x08
     80 #define TH_ACK 0x10
     81 #define TH_URG 0x20
     82 
     83 enum {
     84   TCP_ESTABLISHED = 1,
     85   TCP_SYN_SENT,
     86   TCP_SYN_RECV,
     87   TCP_FIN_WAIT1,
     88   TCP_FIN_WAIT2,
     89   TCP_TIME_WAIT,
     90   TCP_CLOSE,
     91   TCP_CLOSE_WAIT,
     92   TCP_LAST_ACK,
     93   TCP_LISTEN,
     94   TCP_CLOSING
     95 };
     96 
     97 #define TCPOPT_EOL 0
     98 #define TCPOPT_NOP 1
     99 #define TCPOPT_MAXSEG 2
    100 #define TCPOLEN_MAXSEG 4
    101 #define TCPOPT_WINDOW 3
    102 #define TCPOLEN_WINDOW 3
    103 #define TCPOPT_SACK_PERMITTED 4
    104 #define TCPOLEN_SACK_PERMITTED 2
    105 #define TCPOPT_SACK 5
    106 #define TCPOPT_TIMESTAMP 8
    107 #define TCPOLEN_TIMESTAMP 10
    108 #define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2)
    109 
    110 #define TCPOPT_TSTAMP_HDR (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
    111 
    112 __END_DECLS
    113 
    114 #endif /* _NETINET_TCP_H */
    115