kernel/include/net/tcp.h

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2008  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifndef _TCP_H
  20 #define _TCP_H
  21
  22 #include <net/ip.h>
  23
  24 #define PROTO_TCP_CONN_STATE_ESTABILISH         0x1
  25 #define PROTO_TCP_CONN_STATE_ESTABILISHED       0x2
  26 #define PROTO_TCP_CONN_STATE_DISCONNECTED       0x4
  27 #define PROTO_TCP_CONN_STATE_WAIT               0x8
  28 #define PROTO_TCP_CONN_STATE_READY              0x10
  29 #define PROTO_TCP_CONN_STATE_CLOSE              0x20
  30 #define PROTO_TCP_CONN_STATE_ESTABILISHERROR    0x40
  31
  32 /* TCP connection structure */
  33 typedef struct proto_tcp_conn_context {
  34         struct proto_tcp_conn_context *next, *prev;
  35
  36         net_ipv4 ip_source;
  37         net_ipv4 ip_dest;
  38
  39         net_port port_source;
  40         net_port port_dest;
  41
  42         unsigned seq;
  43         unsigned ack;
  44
  45         unsigned short flags;
  46
  47         unsigned char state;
  48
  49         unsigned char bind;
  50
  51         unsigned short fd;
  52
  53         unsigned char cross;
  54
  55         netif_t *netif;
  56
  57         unsigned short offset;
  58         unsigned short len;
  59         char *data;
  60 } proto_tcp_conn_t;
  61
  62 /* TCPv6 connection structure */
  63 typedef struct proto_tcp6_conn_context {
  64         struct proto_tcp6_conn_context *next, *prev;
  65
  66         net_ipv6 ip_source;
  67         net_ipv6 ip_dest;
  68
  69         net_port port_source;
  70         net_port port_dest;
  71
  72         unsigned seq;
  73         unsigned ack;
  74
  75         unsigned short flags;
  76
  77         unsigned char state;
  78
  79         unsigned char bind;
  80
  81         unsigned short fd;
  82
  83         unsigned char cross;
  84
  85         netif_t *netif;
  86
  87         unsigned short offset;
  88         unsigned short len;
  89         char *data;
  90 } proto_tcp6_conn_t;
  91
  92 /* TCP server backlog structure */
  93 typedef struct proto_tcp_backlog_context {
  94         struct proto_tcp_backlog_context *next, *prev;
  95
  96         net_ipv4 ip;
  97
  98         net_port port;
  99
 100         unsigned seq;
 101
 102         proto_tcp_conn_t *conn;
 103 } proto_tcp_backlog_t;
 104
 105 /* TCPv6 server backlog structure */
 106 typedef struct proto_tcp6_backlog_context {
 107         struct proto_tcp6_backlog_context *next, *prev;
 108
 109         net_ipv6 ip;
 110
 111         net_port port;
 112
 113         unsigned seq;
 114
 115         proto_tcp6_conn_t *conn;
 116 } proto_tcp6_backlog_t;
 117
 118 /* TCP layer structure */
 119 typedef struct proto_tcp_t {
 120         net_port port_source;           // 2
 121         net_port port_dest;             // 4
 122
 123         unsigned seq;                   // 8
 124         unsigned ack;                   // 12
 125
 126         unsigned char res:4;            // 13
 127         unsigned char data_offset:4;
 128
 129         unsigned char flags;            // 14
 130
 131         unsigned short window;          // 16
 132
 133         unsigned short checksum;        // 18
 134
 135 //      unsigned char *options;
 136 } proto_tcp_t;
 137
 138
 139 extern unsigned init_net_proto_tcp ();
 140 extern unsigned init_net_proto_tcp6 ();
 141
 142 #endif