|
1 /* TCP.H |
|
2 * |
|
3 * Portions Copyright (c) 1997-1999 Nokia Corporation and/or its subsidiary(-ies). |
|
4 * All rights reserved. |
|
5 */ |
|
6 |
|
7 /** @file |
|
8 @publishedAll |
|
9 @released |
|
10 */ |
|
11 |
|
12 /* |
|
13 * Copyright (c) 1982, 1986 Regents of the University of California. |
|
14 * All rights reserved. The Berkeley software License Agreement |
|
15 * specifies the terms and conditions for redistribution. |
|
16 */ |
|
17 |
|
18 #ifndef _NETINET_TCP_H |
|
19 #define _NETINET_TCP_H |
|
20 |
|
21 #ifdef __cplusplus |
|
22 extern "C" { |
|
23 #endif |
|
24 |
|
25 typedef u_long tcp_seq; |
|
26 /** |
|
27 TCP header. |
|
28 Per RFC 793, September, 1981. |
|
29 @PublishedAll |
|
30 */ |
|
31 struct tcphdr { |
|
32 u_short th_sport; /* source port */ |
|
33 u_short th_dport; /* destination port */ |
|
34 tcp_seq th_seq; /* sequence number */ |
|
35 tcp_seq th_ack; /* acknowledgement number */ |
|
36 #ifdef _BIT_FIELDS_LTOH |
|
37 u_int th_x2:4, /* (unused) */ |
|
38 th_off:4; /* data offset */ |
|
39 #else |
|
40 u_int th_off:4, /* data offset */ |
|
41 th_x2:4; /* (unused) */ |
|
42 #endif |
|
43 u_char th_flags; |
|
44 /** |
|
45 @PublishedAll |
|
46 */ |
|
47 #define TH_FIN 0x01 |
|
48 /** |
|
49 @PublishedAll |
|
50 */ |
|
51 #define TH_SYN 0x02 |
|
52 /** |
|
53 @PublishedAll |
|
54 */ |
|
55 #define TH_RST 0x04 |
|
56 /** |
|
57 @PublishedAll |
|
58 */ |
|
59 #define TH_PUSH 0x08 |
|
60 /** |
|
61 @PublishedAll |
|
62 */ |
|
63 #define TH_ACK 0x10 |
|
64 /** |
|
65 @PublishedAll |
|
66 */ |
|
67 #define TH_URG 0x20 |
|
68 u_short th_win; /* window */ |
|
69 u_short th_sum; /* checksum */ |
|
70 u_short th_urp; /* urgent pointer */ |
|
71 }; |
|
72 |
|
73 #define TCPOPT_EOL 0 |
|
74 #define TCPOPT_NOP 1 |
|
75 #define TCPOPT_MAXSEG 2 |
|
76 |
|
77 /** |
|
78 Default maximum segment size for TCP. |
|
79 With an IP MSS of 576, this is 536, |
|
80 but 512 is probably more convenient. |
|
81 */ |
|
82 #ifdef lint |
|
83 #define TCP_MSS 536 |
|
84 #else |
|
85 #define TCP_MSS MIN(512, IP_MSS - sizeof (struct tcpiphdr)) |
|
86 #endif |
|
87 |
|
88 /** |
|
89 User-settable options (used with setsockopt). |
|
90 */ |
|
91 #define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */ |
|
92 #define TCP_MAXSEG 0x02 /* set maximum segment size */ |
|
93 |
|
94 #define TCP_NOTIFY_THRESHOLD 0x10 |
|
95 #define TCP_ABORT_THRESHOLD 0x11 |
|
96 #define TCP_CONN_NOTIFY_THRESHOLD 0x12 |
|
97 #define TCP_CONN_ABORT_THRESHOLD 0x13 |
|
98 |
|
99 |
|
100 #ifdef __cplusplus |
|
101 } |
|
102 #endif |
|
103 |
|
104 #endif /* _NETINET_TCP_H */ |