include/netinet/tcp.h

   1 #ifndef _NETINET_TCP_H
   2 #define _NETINET_TCP_H
   3
   4 #include <features.h>
   5
   6 #define TCP_NODELAY 1
   7 #define TCP_MAXSEG       2
   8 #define TCP_CORK         3
   9 #define TCP_KEEPIDLE     4
  10 #define TCP_KEEPINTVL    5
  11 #define TCP_KEEPCNT      6
  12 #define TCP_SYNCNT       7
  13 #define TCP_LINGER2      8
  14 #define TCP_DEFER_ACCEPT 9
  15 #define TCP_WINDOW_CLAMP 10
  16 #define TCP_INFO         11
  17 #define TCP_QUICKACK     12
  18 #define TCP_CONGESTION   13
  19 #define TCP_MD5SIG       14
  20 #define TCP_THIN_LINEAR_TIMEOUTS 16
  21 #define TCP_THIN_DUPACK  17
  22 #define TCP_USER_TIMEOUT 18
  23 #define TCP_REPAIR       19
  24 #define TCP_REPAIR_QUEUE 20
  25 #define TCP_QUEUE_SEQ    21
  26 #define TCP_REPAIR_OPTIONS 22
  27 #define TCP_FASTOPEN     23
  28 #define TCP_TIMESTAMP    24
  29 #define TCP_NOTSENT_LOWAT 25
  30 #define TCP_CC_INFO      26
  31 #define TCP_SAVE_SYN     27
  32 #define TCP_SAVED_SYN    28
  33 #define TCP_REPAIR_WINDOW 29
  34
  35 #define TCP_ESTABLISHED  1
  36 #define TCP_SYN_SENT     2
  37 #define TCP_SYN_RECV     3
  38 #define TCP_FIN_WAIT1    4
  39 #define TCP_FIN_WAIT2    5
  40 #define TCP_TIME_WAIT    6
  41 #define TCP_CLOSE        7
  42 #define TCP_CLOSE_WAIT   8
  43 #define TCP_LAST_ACK     9
  44 #define TCP_LISTEN       10
  45 #define TCP_CLOSING      11
  46
  47 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
  48 #define TCPOPT_EOL              0
  49 #define TCPOPT_NOP              1
  50 #define TCPOPT_MAXSEG           2
  51 #define TCPOPT_WINDOW           3
  52 #define TCPOPT_SACK_PERMITTED   4
  53 #define TCPOPT_SACK             5
  54 #define TCPOPT_TIMESTAMP        8
  55 #define TCPOLEN_SACK_PERMITTED  2
  56 #define TCPOLEN_WINDOW          3
  57 #define TCPOLEN_MAXSEG          4
  58 #define TCPOLEN_TIMESTAMP       10
  59
  60 #define SOL_TCP 6
  61
  62 #include <sys/types.h>
  63 #include <sys/socket.h>
  64 #include <stdint.h>
  65 #include <endian.h>
  66
  67 typedef uint32_t tcp_seq;
  68
  69 #define TH_FIN 0x01
  70 #define TH_SYN 0x02
  71 #define TH_RST 0x04
  72 #define TH_PUSH 0x08
  73 #define TH_ACK 0x10
  74 #define TH_URG 0x20
  75
  76 struct tcphdr {
  77 #ifdef _GNU_SOURCE
  78 #ifdef __GNUC__
  79         __extension__
  80 #endif
  81         union { struct {
  82
  83         uint16_t source;
  84         uint16_t dest;
  85         uint32_t seq;
  86         uint32_t ack_seq;
  87 #if __BYTE_ORDER == __LITTLE_ENDIAN
  88         uint16_t res1:4;
  89         uint16_t doff:4;
  90         uint16_t fin:1;
  91         uint16_t syn:1;
  92         uint16_t rst:1;
  93         uint16_t psh:1;
  94         uint16_t ack:1;
  95         uint16_t urg:1;
  96         uint16_t res2:2;
  97 #else
  98         uint16_t doff:4;
  99         uint16_t res1:4;
 100         uint16_t res2:2;
 101         uint16_t urg:1;
 102         uint16_t ack:1;
 103         uint16_t psh:1;
 104         uint16_t rst:1;
 105         uint16_t syn:1;
 106         uint16_t fin:1;
 107 #endif
 108         uint16_t window;
 109         uint16_t check;
 110         uint16_t urg_ptr;
 111
 112         }; struct {
 113 #endif
 114
 115         uint16_t th_sport;
 116         uint16_t th_dport;
 117         uint32_t th_seq;
 118         uint32_t th_ack;
 119 #if __BYTE_ORDER == __LITTLE_ENDIAN
 120         uint8_t th_x2:4;
 121         uint8_t th_off:4;
 122 #else
 123         uint8_t th_off:4;
 124         uint8_t th_x2:4;
 125 #endif
 126         uint8_t th_flags;
 127         uint16_t th_win;
 128         uint16_t th_sum;
 129         uint16_t th_urp;
 130
 131 #ifdef _GNU_SOURCE
 132         }; };
 133 #endif
 134 };
 135 #endif
 136
 137 #ifdef _GNU_SOURCE
 138 #define TCPI_OPT_TIMESTAMPS     1
 139 #define TCPI_OPT_SACK           2
 140 #define TCPI_OPT_WSCALE         4
 141 #define TCPI_OPT_ECN            8
 142
 143 #define TCP_CA_Open             0
 144 #define TCP_CA_Disorder         1
 145 #define TCP_CA_CWR              2
 146 #define TCP_CA_Recovery         3
 147 #define TCP_CA_Loss             4
 148
 149 struct tcp_info {
 150         uint8_t tcpi_state;
 151         uint8_t tcpi_ca_state;
 152         uint8_t tcpi_retransmits;
 153         uint8_t tcpi_probes;
 154         uint8_t tcpi_backoff;
 155         uint8_t tcpi_options;
 156         uint8_t tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;
 157         uint8_t tcpi_delivery_rate_app_limited : 1;
 158         uint32_t tcpi_rto;
 159         uint32_t tcpi_ato;
 160         uint32_t tcpi_snd_mss;
 161         uint32_t tcpi_rcv_mss;
 162         uint32_t tcpi_unacked;
 163         uint32_t tcpi_sacked;
 164         uint32_t tcpi_lost;
 165         uint32_t tcpi_retrans;
 166         uint32_t tcpi_fackets;
 167         uint32_t tcpi_last_data_sent;
 168         uint32_t tcpi_last_ack_sent;
 169         uint32_t tcpi_last_data_recv;
 170         uint32_t tcpi_last_ack_recv;
 171         uint32_t tcpi_pmtu;
 172         uint32_t tcpi_rcv_ssthresh;
 173         uint32_t tcpi_rtt;
 174         uint32_t tcpi_rttvar;
 175         uint32_t tcpi_snd_ssthresh;
 176         uint32_t tcpi_snd_cwnd;
 177         uint32_t tcpi_advmss;
 178         uint32_t tcpi_reordering;
 179         uint32_t tcpi_rcv_rtt;
 180         uint32_t tcpi_rcv_space;
 181         uint32_t tcpi_total_retrans;
 182         uint64_t tcpi_pacing_rate;
 183         uint64_t tcpi_max_pacing_rate;
 184         uint64_t tcpi_bytes_acked;
 185         uint64_t tcpi_bytes_received;
 186         uint32_t tcpi_segs_out;
 187         uint32_t tcpi_segs_in;
 188         uint32_t tcpi_notsent_bytes;
 189         uint32_t tcpi_min_rtt;
 190         uint32_t tcpi_data_segs_in;
 191         uint32_t tcpi_data_segs_out;
 192         uint64_t tcpi_delivery_rate;
 193 };
 194
 195 #define TCP_MD5SIG_MAXKEYLEN    80
 196
 197 struct tcp_md5sig {
 198         struct sockaddr_storage tcpm_addr;
 199         uint16_t __tcpm_pad1;
 200         uint16_t tcpm_keylen;
 201         uint32_t __tcpm_pad2;
 202         uint8_t tcpm_key[TCP_MD5SIG_MAXKEYLEN];
 203 };
 204
 205 struct tcp_repair_window {
 206         uint32_t snd_wl1;
 207         uint32_t snd_wnd;
 208         uint32_t max_window;
 209         uint32_t rcv_wnd;
 210         uint32_t rcv_wup;
 211 };
 212
 213 #endif
 214
 215 #endif