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tcpbase.h
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1 /**
2  * @file
3  * Base TCP API definitions shared by TCP and ALTCP\n
4  * See also @ref tcp_raw
5  */
6 
7 /*
8  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
9  * All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without modification,
12  * are permitted provided that the following conditions are met:
13  *
14  * 1. Redistributions of source code must retain the above copyright notice,
15  * this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright notice,
17  * this list of conditions and the following disclaimer in the documentation
18  * and/or other materials provided with the distribution.
19  * 3. The name of the author may not be used to endorse or promote products
20  * derived from this software without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
25  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
27  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
30  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
31  * OF SUCH DAMAGE.
32  *
33  * This file is part of the lwIP TCP/IP stack.
34  *
35  * Author: Adam Dunkels <adam@sics.se>
36  *
37  */
38 #ifndef LWIP_HDR_TCPBASE_H
39 #define LWIP_HDR_TCPBASE_H
40 
41 #include "lwip/opt.h"
42 
43 #if LWIP_TCP /* don't build if not configured for use in lwipopts.h */
44 
45 #ifdef __cplusplus
46 extern "C" {
47 #endif
48 
49 
50 #if LWIP_WND_SCALE
51 typedef u32_t tcpwnd_size_t;
52 #else
53 typedef u16_t tcpwnd_size_t;
54 #endif
55 
56 enum tcp_state {
57  CLOSED = 0,
58  LISTEN = 1,
59  SYN_SENT = 2,
60  SYN_RCVD = 3,
61  ESTABLISHED = 4,
62  FIN_WAIT_1 = 5,
63  FIN_WAIT_2 = 6,
64  CLOSE_WAIT = 7,
65  CLOSING = 8,
66  LAST_ACK = 9,
67  TIME_WAIT = 10
68 };
69 /* ATTENTION: this depends on state number ordering! */
70 #define TCP_STATE_IS_CLOSING(state) ((state) >= FIN_WAIT_1)
71 
72 /* Flags for "apiflags" parameter in tcp_write */
73 #define TCP_WRITE_FLAG_COPY 0x01
74 #define TCP_WRITE_FLAG_MORE 0x02
75 
76 #define TCP_PRIO_MIN 1
77 #define TCP_PRIO_NORMAL 64
78 #define TCP_PRIO_MAX 127
79 
80 const char* tcp_debug_state_str(enum tcp_state s);
81 
82 #ifdef __cplusplus
83 }
84 #endif
85 
86 #endif /* LWIP_TCP */
87 
88 #endif /* LWIP_HDR_TCPBASE_H */
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