| /* |
| * INET An implementation of the TCP/IP protocol suite for the LINUX |
| * operating system. INET is implemented using the BSD Socket |
| * interface as the means of communication with the user level. |
| * |
| * Definitions for the TCP protocol. |
| * |
| * Version: @(#)tcp.h 1.0.2 04/28/93 |
| * |
| * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| #ifndef _LINUX_TCP_H |
| #define _LINUX_TCP_H |
| |
| #include <linux/types.h> |
| #include <asm/byteorder.h> |
| |
| struct tcphdr { |
| __u16 source; |
| __u16 dest; |
| __u32 seq; |
| __u32 ack_seq; |
| #if defined(__LITTLE_ENDIAN_BITFIELD) |
| __u16 res1:4, |
| doff:4, |
| fin:1, |
| syn:1, |
| rst:1, |
| psh:1, |
| ack:1, |
| urg:1, |
| ece:1, |
| cwr:1; |
| #elif defined(__BIG_ENDIAN_BITFIELD) |
| __u16 doff:4, |
| res1:4, |
| cwr:1, |
| ece:1, |
| urg:1, |
| ack:1, |
| psh:1, |
| rst:1, |
| syn:1, |
| fin:1; |
| #else |
| #error "Adjust your <asm/byteorder.h> defines" |
| #endif |
| __u16 window; |
| __u16 check; |
| __u16 urg_ptr; |
| }; |
| |
| |
| enum { |
| TCP_ESTABLISHED = 1, |
| TCP_SYN_SENT, |
| TCP_SYN_RECV, |
| TCP_FIN_WAIT1, |
| TCP_FIN_WAIT2, |
| TCP_TIME_WAIT, |
| TCP_CLOSE, |
| TCP_CLOSE_WAIT, |
| TCP_LAST_ACK, |
| TCP_LISTEN, |
| TCP_CLOSING, /* now a valid state */ |
| |
| TCP_MAX_STATES /* Leave at the end! */ |
| }; |
| |
| #define TCP_STATE_MASK 0xF |
| #define TCP_ACTION_FIN (1 << 7) |
| |
| enum { |
| TCPF_ESTABLISHED = (1 << 1), |
| TCPF_SYN_SENT = (1 << 2), |
| TCPF_SYN_RECV = (1 << 3), |
| TCPF_FIN_WAIT1 = (1 << 4), |
| TCPF_FIN_WAIT2 = (1 << 5), |
| TCPF_TIME_WAIT = (1 << 6), |
| TCPF_CLOSE = (1 << 7), |
| TCPF_CLOSE_WAIT = (1 << 8), |
| TCPF_LAST_ACK = (1 << 9), |
| TCPF_LISTEN = (1 << 10), |
| TCPF_CLOSING = (1 << 11) |
| }; |
| |
| /* |
| * The union cast uses a gcc extension to avoid aliasing problems |
| * (union is compatible to any of its members) |
| * This means this part of the code is -fstrict-aliasing safe now. |
| */ |
| union tcp_word_hdr { |
| struct tcphdr hdr; |
| __u32 words[5]; |
| }; |
| |
| #define tcp_flag_word(tp) ( ((union tcp_word_hdr *)(tp))->words [3]) |
| |
| enum { |
| TCP_FLAG_CWR = __constant_htonl(0x00800000), |
| TCP_FLAG_ECE = __constant_htonl(0x00400000), |
| TCP_FLAG_URG = __constant_htonl(0x00200000), |
| TCP_FLAG_ACK = __constant_htonl(0x00100000), |
| TCP_FLAG_PSH = __constant_htonl(0x00080000), |
| TCP_FLAG_RST = __constant_htonl(0x00040000), |
| TCP_FLAG_SYN = __constant_htonl(0x00020000), |
| TCP_FLAG_FIN = __constant_htonl(0x00010000), |
| TCP_RESERVED_BITS = __constant_htonl(0x0F000000), |
| TCP_DATA_OFFSET = __constant_htonl(0xF0000000) |
| }; |
| |
| /* TCP socket options */ |
| #define TCP_NODELAY 1 /* Turn off Nagle's algorithm. */ |
| #define TCP_MAXSEG 2 /* Limit MSS */ |
| #define TCP_CORK 3 /* Never send partially complete segments */ |
| #define TCP_KEEPIDLE 4 /* Start keeplives after this period */ |
| #define TCP_KEEPINTVL 5 /* Interval between keepalives */ |
| #define TCP_KEEPCNT 6 /* Number of keepalives before death */ |
| #define TCP_SYNCNT 7 /* Number of SYN retransmits */ |
| #define TCP_LINGER2 8 /* Life time of orphaned FIN-WAIT-2 state */ |
| #define TCP_DEFER_ACCEPT 9 /* Wake up listener only when data arrive */ |
| #define TCP_WINDOW_CLAMP 10 /* Bound advertised window */ |
| #define TCP_INFO 11 /* Information about this connection. */ |
| #define TCP_QUICKACK 12 /* Block/reenable quick acks */ |
| #define TCP_CONGESTION 13 /* Congestion control algorithm */ |
| |
| #define TCPI_OPT_TIMESTAMPS 1 |
| #define TCPI_OPT_SACK 2 |
| #define TCPI_OPT_WSCALE 4 |
| #define TCPI_OPT_ECN 8 |
| |
| enum tcp_ca_state |
| { |
| TCP_CA_Open = 0, |
| #define TCPF_CA_Open (1<<TCP_CA_Open) |
| TCP_CA_Disorder = 1, |
| #define TCPF_CA_Disorder (1<<TCP_CA_Disorder) |
| TCP_CA_CWR = 2, |
| #define TCPF_CA_CWR (1<<TCP_CA_CWR) |
| TCP_CA_Recovery = 3, |
| #define TCPF_CA_Recovery (1<<TCP_CA_Recovery) |
| TCP_CA_Loss = 4 |
| #define TCPF_CA_Loss (1<<TCP_CA_Loss) |
| }; |
| |
| struct tcp_info |
| { |
| __u8 tcpi_state; |
| __u8 tcpi_ca_state; |
| __u8 tcpi_retransmits; |
| __u8 tcpi_probes; |
| __u8 tcpi_backoff; |
| __u8 tcpi_options; |
| __u8 tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4; |
| |
| __u32 tcpi_rto; |
| __u32 tcpi_ato; |
| __u32 tcpi_snd_mss; |
| __u32 tcpi_rcv_mss; |
| |
| __u32 tcpi_unacked; |
| __u32 tcpi_sacked; |
| __u32 tcpi_lost; |
| __u32 tcpi_retrans; |
| __u32 tcpi_fackets; |
| |
| /* Times. */ |
| __u32 tcpi_last_data_sent; |
| __u32 tcpi_last_ack_sent; /* Not remembered, sorry. */ |
| __u32 tcpi_last_data_recv; |
| __u32 tcpi_last_ack_recv; |
| |
| /* Metrics. */ |
| __u32 tcpi_pmtu; |
| __u32 tcpi_rcv_ssthresh; |
| __u32 tcpi_rtt; |
| __u32 tcpi_rttvar; |
| __u32 tcpi_snd_ssthresh; |
| __u32 tcpi_snd_cwnd; |
| __u32 tcpi_advmss; |
| __u32 tcpi_reordering; |
| |
| __u32 tcpi_rcv_rtt; |
| __u32 tcpi_rcv_space; |
| |
| __u32 tcpi_total_retrans; |
| }; |
| |
| |
| #endif /* _LINUX_TCP_H */ |