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