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      1 /****************************************************************************
      2  ****************************************************************************
      3  ***
      4  ***   This header was automatically generated from a Linux kernel header
      5  ***   of the same name, to make information necessary for userspace to
      6  ***   call into the kernel available to libc.  It contains only constants,
      7  ***   structures, and macros generated from the original header, and thus,
      8  ***   contains no copyrightable information.
      9  ***
     10  ****************************************************************************
     11  ****************************************************************************/
     12 #ifndef _LINUX_TCP_H
     13 #define _LINUX_TCP_H
     14 
     15 #include <linux/types.h>
     16 #include <asm/byteorder.h>
     17 
     18 struct tcphdr {
     19  __u16 source;
     20  __u16 dest;
     21  __u32 seq;
     22  __u32 ack_seq;
     23 #ifdef __LITTLE_ENDIAN_BITFIELD
     24  __u16 res1:4,
     25  doff:4,
     26  fin:1,
     27  syn:1,
     28  rst:1,
     29  psh:1,
     30  ack:1,
     31  urg:1,
     32  ece:1,
     33  cwr:1;
     34 #elif defined(__BIG_ENDIAN_BITFIELD)
     35  __u16 doff:4,
     36  res1:4,
     37  cwr:1,
     38  ece:1,
     39  urg:1,
     40  ack:1,
     41  psh:1,
     42  rst:1,
     43  syn:1,
     44  fin:1;
     45 #else
     46 #error "Adjust your <asm/byteorder.h> defines"
     47 #endif
     48  __u16 window;
     49  __u16 check;
     50  __u16 urg_ptr;
     51 };
     52 
     53 union tcp_word_hdr {
     54  struct tcphdr hdr;
     55  __u32 words[5];
     56 };
     57 
     58 #define tcp_flag_word(tp) ( ((union tcp_word_hdr *)(tp))->words [3])
     59 
     60 enum {
     61  TCP_FLAG_CWR = __constant_htonl(0x00800000),
     62  TCP_FLAG_ECE = __constant_htonl(0x00400000),
     63  TCP_FLAG_URG = __constant_htonl(0x00200000),
     64  TCP_FLAG_ACK = __constant_htonl(0x00100000),
     65  TCP_FLAG_PSH = __constant_htonl(0x00080000),
     66  TCP_FLAG_RST = __constant_htonl(0x00040000),
     67  TCP_FLAG_SYN = __constant_htonl(0x00020000),
     68  TCP_FLAG_FIN = __constant_htonl(0x00010000),
     69  TCP_RESERVED_BITS = __constant_htonl(0x0F000000),
     70  TCP_DATA_OFFSET = __constant_htonl(0xF0000000)
     71 };
     72 
     73 #define TCP_NODELAY 1
     74 #define TCP_MAXSEG 2
     75 #define TCP_CORK 3
     76 #define TCP_KEEPIDLE 4
     77 #define TCP_KEEPINTVL 5
     78 #define TCP_KEEPCNT 6
     79 #define TCP_SYNCNT 7
     80 #define TCP_LINGER2 8
     81 #define TCP_DEFER_ACCEPT 9
     82 #define TCP_WINDOW_CLAMP 10
     83 #define TCP_INFO 11
     84 #define TCP_QUICKACK 12
     85 #define TCP_CONGESTION 13
     86 
     87 #define TCPI_OPT_TIMESTAMPS 1
     88 #define TCPI_OPT_SACK 2
     89 #define TCPI_OPT_WSCALE 4
     90 #define TCPI_OPT_ECN 8
     91 
     92 enum tcp_ca_state
     93 {
     94  TCP_CA_Open = 0,
     95 #define TCPF_CA_Open (1<<TCP_CA_Open)
     96  TCP_CA_Disorder = 1,
     97 #define TCPF_CA_Disorder (1<<TCP_CA_Disorder)
     98  TCP_CA_CWR = 2,
     99 #define TCPF_CA_CWR (1<<TCP_CA_CWR)
    100  TCP_CA_Recovery = 3,
    101 #define TCPF_CA_Recovery (1<<TCP_CA_Recovery)
    102  TCP_CA_Loss = 4
    103 #define TCPF_CA_Loss (1<<TCP_CA_Loss)
    104 };
    105 
    106 struct tcp_info
    107 {
    108  __u8 tcpi_state;
    109  __u8 tcpi_ca_state;
    110  __u8 tcpi_retransmits;
    111  __u8 tcpi_probes;
    112  __u8 tcpi_backoff;
    113  __u8 tcpi_options;
    114  __u8 tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;
    115 
    116  __u32 tcpi_rto;
    117  __u32 tcpi_ato;
    118  __u32 tcpi_snd_mss;
    119  __u32 tcpi_rcv_mss;
    120 
    121  __u32 tcpi_unacked;
    122  __u32 tcpi_sacked;
    123  __u32 tcpi_lost;
    124  __u32 tcpi_retrans;
    125  __u32 tcpi_fackets;
    126 
    127  __u32 tcpi_last_data_sent;
    128  __u32 tcpi_last_ack_sent;
    129  __u32 tcpi_last_data_recv;
    130  __u32 tcpi_last_ack_recv;
    131 
    132  __u32 tcpi_pmtu;
    133  __u32 tcpi_rcv_ssthresh;
    134  __u32 tcpi_rtt;
    135  __u32 tcpi_rttvar;
    136  __u32 tcpi_snd_ssthresh;
    137  __u32 tcpi_snd_cwnd;
    138  __u32 tcpi_advmss;
    139  __u32 tcpi_reordering;
    140 
    141  __u32 tcpi_rcv_rtt;
    142  __u32 tcpi_rcv_space;
    143 
    144  __u32 tcpi_total_retrans;
    145 };
    146 
    147 #endif
    148