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17#ifndef _UAPI_LINUX_TCP_H
18#define _UAPI_LINUX_TCP_H
19
20#include <linux/types.h>
21#include <asm/byteorder.h>
22#include <linux/socket.h>
23
24struct tcphdr {
25 __be16 source;
26 __be16 dest;
27 __be32 seq;
28 __be32 ack_seq;
29#if defined(__LITTLE_ENDIAN_BITFIELD)
30 __u16 res1:4,
31 doff:4,
32 fin:1,
33 syn:1,
34 rst:1,
35 psh:1,
36 ack:1,
37 urg:1,
38 ece:1,
39 cwr:1;
40#elif defined(__BIG_ENDIAN_BITFIELD)
41 __u16 doff:4,
42 res1:4,
43 cwr:1,
44 ece:1,
45 urg:1,
46 ack:1,
47 psh:1,
48 rst:1,
49 syn:1,
50 fin:1;
51#else
52#error "Adjust your <asm/byteorder.h> defines"
53#endif
54 __be16 window;
55 __sum16 check;
56 __be16 urg_ptr;
57};
58
59
60
61
62
63
64union tcp_word_hdr {
65 struct tcphdr hdr;
66 __be32 words[5];
67};
68
69#define tcp_flag_word(tp) ( ((union tcp_word_hdr *)(tp))->words [3])
70
71enum {
72 TCP_FLAG_CWR = __constant_cpu_to_be32(0x00800000),
73 TCP_FLAG_ECE = __constant_cpu_to_be32(0x00400000),
74 TCP_FLAG_URG = __constant_cpu_to_be32(0x00200000),
75 TCP_FLAG_ACK = __constant_cpu_to_be32(0x00100000),
76 TCP_FLAG_PSH = __constant_cpu_to_be32(0x00080000),
77 TCP_FLAG_RST = __constant_cpu_to_be32(0x00040000),
78 TCP_FLAG_SYN = __constant_cpu_to_be32(0x00020000),
79 TCP_FLAG_FIN = __constant_cpu_to_be32(0x00010000),
80 TCP_RESERVED_BITS = __constant_cpu_to_be32(0x0F000000),
81 TCP_DATA_OFFSET = __constant_cpu_to_be32(0xF0000000)
82};
83
84
85
86
87#define TCP_MSS_DEFAULT 536U
88#define TCP_MSS_DESIRED 1220U
89
90
91#define TCP_NODELAY 1
92#define TCP_MAXSEG 2
93#define TCP_CORK 3
94#define TCP_KEEPIDLE 4
95#define TCP_KEEPINTVL 5
96#define TCP_KEEPCNT 6
97#define TCP_SYNCNT 7
98#define TCP_LINGER2 8
99#define TCP_DEFER_ACCEPT 9
100#define TCP_WINDOW_CLAMP 10
101#define TCP_INFO 11
102#define TCP_QUICKACK 12
103#define TCP_CONGESTION 13
104#define TCP_MD5SIG 14
105#define TCP_THIN_LINEAR_TIMEOUTS 16
106#define TCP_THIN_DUPACK 17
107#define TCP_USER_TIMEOUT 18
108#define TCP_REPAIR 19
109#define TCP_REPAIR_QUEUE 20
110#define TCP_QUEUE_SEQ 21
111#define TCP_REPAIR_OPTIONS 22
112#define TCP_FASTOPEN 23
113#define TCP_TIMESTAMP 24
114#define TCP_NOTSENT_LOWAT 25
115
116struct tcp_repair_opt {
117 __u32 opt_code;
118 __u32 opt_val;
119};
120
121enum {
122 TCP_NO_QUEUE,
123 TCP_RECV_QUEUE,
124 TCP_SEND_QUEUE,
125 TCP_QUEUES_NR,
126};
127
128
129#define TCPI_OPT_TIMESTAMPS 1
130#define TCPI_OPT_SACK 2
131#define TCPI_OPT_WSCALE 4
132#define TCPI_OPT_ECN 8
133#define TCPI_OPT_ECN_SEEN 16
134#define TCPI_OPT_SYN_DATA 32
135
136enum tcp_ca_state {
137 TCP_CA_Open = 0,
138#define TCPF_CA_Open (1<<TCP_CA_Open)
139 TCP_CA_Disorder = 1,
140#define TCPF_CA_Disorder (1<<TCP_CA_Disorder)
141 TCP_CA_CWR = 2,
142#define TCPF_CA_CWR (1<<TCP_CA_CWR)
143 TCP_CA_Recovery = 3,
144#define TCPF_CA_Recovery (1<<TCP_CA_Recovery)
145 TCP_CA_Loss = 4
146#define TCPF_CA_Loss (1<<TCP_CA_Loss)
147};
148
149struct tcp_info {
150 __u8 tcpi_state;
151 __u8 tcpi_ca_state;
152 __u8 tcpi_retransmits;
153 __u8 tcpi_probes;
154 __u8 tcpi_backoff;
155 __u8 tcpi_options;
156 __u8 tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;
157
158 __u32 tcpi_rto;
159 __u32 tcpi_ato;
160 __u32 tcpi_snd_mss;
161 __u32 tcpi_rcv_mss;
162
163 __u32 tcpi_unacked;
164 __u32 tcpi_sacked;
165 __u32 tcpi_lost;
166 __u32 tcpi_retrans;
167 __u32 tcpi_fackets;
168
169
170 __u32 tcpi_last_data_sent;
171 __u32 tcpi_last_ack_sent;
172 __u32 tcpi_last_data_recv;
173 __u32 tcpi_last_ack_recv;
174
175
176 __u32 tcpi_pmtu;
177 __u32 tcpi_rcv_ssthresh;
178 __u32 tcpi_rtt;
179 __u32 tcpi_rttvar;
180 __u32 tcpi_snd_ssthresh;
181 __u32 tcpi_snd_cwnd;
182 __u32 tcpi_advmss;
183 __u32 tcpi_reordering;
184
185 __u32 tcpi_rcv_rtt;
186 __u32 tcpi_rcv_space;
187
188 __u32 tcpi_total_retrans;
189};
190
191
192#define TCP_MD5SIG_MAXKEYLEN 80
193
194struct tcp_md5sig {
195 struct __kernel_sockaddr_storage tcpm_addr;
196 __u16 __tcpm_pad1;
197 __u16 tcpm_keylen;
198 __u32 __tcpm_pad2;
199 __u8 tcpm_key[TCP_MD5SIG_MAXKEYLEN];
200};
201
202#endif
203