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minix/servers/inet/generic/tcp_int.h
Lionel Sambuc 9fab85c2de Replacing timer_t by netbsd's timer_t 
* Renamed struct timer to struct minix_timer
 * Renamed timer_t to minix_timer_t
 * Ensured all the code uses the minix_timer_t typedef
 * Removed ifdef around _BSD_TIMER_T
 * Removed include/timers.h and merged it into include/minix/timers.h
 * Resolved prototype conflict by renaming kernel's (re)set_timer
   to (re)set_kernel_timer.

Change-Id: I56f0f30dfed96e1a0575d92492294cf9a06468a5
2014-03-01 09:04:54 +01:00

266 lines
7.4 KiB
C
Raw Blame History

/*
tcp_int.h
Copyright 1995 Philip Homburg
*/
#ifndef TCP_INT_H
#define TCP_INT_H
#define IP_TCP_MIN_HDR_SIZE (IP_MIN_HDR_SIZE+TCP_MIN_HDR_SIZE)
#define TCP_CONN_HASH_SHIFT 4
#define TCP_CONN_HASH_NR (1 << TCP_CONN_HASH_SHIFT)
typedef struct tcp_port
{
int tp_ipdev;
int tp_flags;
int tp_state;
int tp_ipfd;
acc_t *tp_pack;
ipaddr_t tp_ipaddr;
ipaddr_t tp_subnetmask;
u16_t tp_mtu;
struct tcp_conn *tp_snd_head;
struct tcp_conn *tp_snd_tail;
event_t tp_snd_event;
struct tcp_conn *tp_conn_hash[TCP_CONN_HASH_NR][4];
} tcp_port_t;
#define TPF_EMPTY 0x0
#define TPF_SUSPEND 0x1
#define TPF_READ_IP 0x2
#define TPF_READ_SP 0x4
#define TPF_WRITE_IP 0x8
#define TPF_WRITE_SP 0x10
#define TPF_DELAY_TCP 0x40
#define TPS_EMPTY 0
#define TPS_SETPROTO 1
#define TPS_GETCONF 2
#define TPS_MAIN 3
#define TPS_ERROR 4
#define TFL_LISTEN_MAX 5
typedef struct tcp_fd
{
unsigned long tf_flags;
tcp_port_t *tf_port;
int tf_srfd;
ioreq_t tf_ioreq;
nwio_tcpconf_t tf_tcpconf;
nwio_tcpopt_t tf_tcpopt;
get_userdata_t tf_get_userdata;
put_userdata_t tf_put_userdata;
select_res_t tf_select_res;
struct tcp_conn *tf_conn;
struct tcp_conn *tf_listenq[TFL_LISTEN_MAX];
size_t tf_write_offset;
size_t tf_write_count;
size_t tf_read_offset;
size_t tf_read_count;
int tf_error; /* Error for nonblocking connect */
tcp_cookie_t tf_cookie;
} tcp_fd_t;
#define TFF_EMPTY 0x0
#define TFF_INUSE 0x1
#define TFF_READ_IP 0x2
#define TFF_WRITE_IP 0x4
#define TFF_IOCTL_IP 0x8
#define TFF_CONF_SET 0x10
#define TFF_IOC_INIT_SP 0x20
#define TFF_LISTENQ 0x40
#define TFF_CONNECTING 0x80
#define TFF_CONNECTED 0x100
#define TFF_WR_URG 0x200
#define TFF_PUSH_DATA 0x400
#define TFF_RECV_URG 0x800
#define TFF_SEL_READ 0x1000
#define TFF_SEL_WRITE 0x2000
#define TFF_SEL_EXCEPT 0x4000
#define TFF_DEL_RST 0x8000
#define TFF_COOKIE 0x10000
typedef struct tcp_conn
{
int tc_flags;
int tc_state;
int tc_busy; /* do not steal buffer when a connection is
* busy
*/
tcp_port_t *tc_port;
tcp_fd_t *tc_fd;
tcpport_t tc_locport;
ipaddr_t tc_locaddr;
tcpport_t tc_remport;
ipaddr_t tc_remaddr;
int tc_connInprogress;
int tc_orglisten;
clock_t tc_senddis;
/* Sending side */
u32_t tc_ISS; /* initial sequence number */
u32_t tc_SND_UNA; /* least unacknowledged sequence number */
u32_t tc_SND_TRM; /* next sequence number to be transmitted */
u32_t tc_SND_NXT; /* next sequence number for new data */
u32_t tc_SND_UP; /* urgent pointer, first sequence number not
* urgent */
u32_t tc_SND_PSH; /* push pointer, data should be pushed until
* the push pointer is reached */
u32_t tc_snd_cwnd; /* highest sequence number to be sent */
u32_t tc_snd_cthresh; /* threshold for send window */
u32_t tc_snd_cinc; /* increment for send window threshold */
u16_t tc_snd_wnd; /* max send queue size */
u16_t tc_snd_dack; /* # of duplicate ACKs */
/* round trip calculation. */
clock_t tc_rt_time;
u32_t tc_rt_seq;
u32_t tc_rt_threshold;
clock_t tc_artt; /* Avg. retransmission time. Scaled. */
clock_t tc_drtt; /* Diviation, also scaled. */
clock_t tc_rtt; /* Computed retrans time */
acc_t *tc_send_data;
acc_t *tc_frag2send;
struct tcp_conn *tc_send_link;
/* Receiving side */
u32_t tc_IRS;
u32_t tc_RCV_LO;
u32_t tc_RCV_NXT;
u32_t tc_RCV_HI;
u32_t tc_RCV_UP;
u16_t tc_rcv_wnd;
acc_t *tc_rcvd_data;
acc_t *tc_adv_data;
u32_t tc_adv_seq;
/* Keep alive. Record SDN_NXT and RCV_NXT in tc_ka_snd and
* tc_ka_rcv when setting the keepalive timer to detect
* any activity that may have happend before the timer
* expired.
*/
u32_t tc_ka_snd;
u32_t tc_ka_rcv;
clock_t tc_ka_time;
acc_t *tc_remipopt;
acc_t *tc_tcpopt;
u8_t tc_tos;
u8_t tc_ttl;
u16_t tc_max_mtu; /* Max. negotiated (or selected) MTU */
u16_t tc_mtu; /* discovered PMTU */
clock_t tc_mtutim; /* Last time MTU/TCF_PMTU flag was changed */
minix_timer_t tc_transmit_timer;
u32_t tc_transmit_seq;
clock_t tc_0wnd_to;
clock_t tc_stt; /* time of first send after last ack */
clock_t tc_rt_dead;
int tc_error;
int tc_inconsistent;
} tcp_conn_t;
#define TCF_EMPTY 0x0
#define TCF_INUSE 0x1
#define TCF_FIN_RECV 0x2
#define TCF_RCV_PUSH 0x4
#define TCF_MORE2WRITE 0x8
#define TCF_SEND_ACK 0x10
#define TCF_FIN_SENT 0x20
#define TCF_BSD_URG 0x40
#define TCF_NO_PUSH 0x80
#define TCF_PUSH_NOW 0x100
#define TCF_PMTU 0x200
#if DEBUG & 0x200
#define TCF_DEBUG 0x1000
#endif
#define TCS_CLOSED 0
#define TCS_LISTEN 1
#define TCS_SYN_RECEIVED 2
#define TCS_SYN_SENT 3
#define TCS_ESTABLISHED 4
#define TCS_CLOSING 5
/* tcp_recv.c */
void tcp_frag2conn ARGS(( tcp_conn_t *tcp_conn, ip_hdr_t *ip_hdr,
tcp_hdr_t *tcp_hdr, acc_t *tcp_data, size_t data_len ));
void tcp_fd_read ARGS(( tcp_conn_t *tcp_conn, int enq ));
unsigned tcp_sel_read ARGS(( tcp_conn_t *tcp_conn ));
void tcp_rsel_read ARGS(( tcp_conn_t *tcp_conn ));
void tcp_bytesavailable ARGS(( tcp_fd_t *tcp_fd, int *bytesp ));
/* tcp_send.c */
void tcp_conn_write ARGS(( tcp_conn_t *tcp_conn, int enq ));
void tcp_release_retrans ARGS(( tcp_conn_t *tcp_conn, u32_t seg_ack,
u16_t new_win ));
void tcp_fast_retrans ARGS(( tcp_conn_t *tcp_conn ));
void tcp_set_send_timer ARGS(( tcp_conn_t *tcp_conn ));
void tcp_fd_write ARGS(( tcp_conn_t *tcp_conn ));
unsigned tcp_sel_write ARGS(( tcp_conn_t *tcp_conn ));
void tcp_rsel_write ARGS(( tcp_conn_t *tcp_conn ));
void tcp_close_connection ARGS(( tcp_conn_t *tcp_conn,
int error ));
void tcp_port_write ARGS(( tcp_port_t *tcp_port ));
void tcp_shutdown ARGS(( tcp_conn_t *tcp_conn ));
/* tcp_lib.c */
void tcp_extract_ipopt ARGS(( tcp_conn_t *tcp_conn,
ip_hdr_t *ip_hdr ));
void tcp_extract_tcpopt ARGS(( tcp_conn_t *tcp_conn,
tcp_hdr_t *tcp_hdr, size_t *mssp ));
void tcp_get_ipopt ARGS(( tcp_conn_t *tcp_conn, ip_hdropt_t
*ip_hdropt ));
void tcp_get_tcpopt ARGS(( tcp_conn_t *tcp_conn, tcp_hdropt_t
*tcp_hdropt ));
acc_t *tcp_make_header ARGS(( tcp_conn_t *tcp_conn,
ip_hdr_t **ref_ip_hdr, tcp_hdr_t **ref_tcp_hdr, acc_t *data ));
u16_t tcp_pack_oneCsum ARGS(( ip_hdr_t *ip_hdr, acc_t *tcp_pack ));
int tcp_check_conn ARGS(( tcp_conn_t *tcp_conn ));
void tcp_print_pack ARGS(( ip_hdr_t *ip_hdr, tcp_hdr_t *tcp_hdr ));
void tcp_print_state ARGS(( tcp_conn_t *tcp_conn ));
void tcp_print_conn ARGS(( tcp_conn_t *tcp_conn ));
int tcp_LEmod4G ARGS(( u32_t n1, u32_t n2 ));
int tcp_Lmod4G ARGS(( u32_t n1, u32_t n2 ));
int tcp_GEmod4G ARGS(( u32_t n1, u32_t n2 ));
int tcp_Gmod4G ARGS(( u32_t n1, u32_t n2 ));
/* tcp.c */
void tcp_restart_connect ARGS(( tcp_conn_t *tcp_conn ));
int tcp_su4listen ARGS(( tcp_fd_t *tcp_fd, tcp_conn_t *tcp_conn,
int do_listenq ));
void tcp_reply_ioctl ARGS(( tcp_fd_t *tcp_fd, int reply ));
void tcp_reply_write ARGS(( tcp_fd_t *tcp_fd, size_t reply ));
void tcp_reply_read ARGS(( tcp_fd_t *tcp_fd, size_t reply ));
void tcp_notreach ARGS(( tcp_conn_t *tcp_conn, int error ));
void tcp_mtu_exceeded ARGS(( tcp_conn_t *tcp_conn ));
void tcp_mtu_incr ARGS(( tcp_conn_t *tcp_conn ));
#define TCP_FD_NR (10*IP_PORT_MAX)
#define TCP_CONN_NR (2*TCP_FD_NR)
EXTERN tcp_port_t *tcp_port_table;
EXTERN tcp_conn_t tcp_conn_table[TCP_CONN_NR];
EXTERN tcp_fd_t tcp_fd_table[TCP_FD_NR];
#define tcp_Lmod4G(n1,n2) (!!(((n1)-(n2)) & 0x80000000L))
#define tcp_GEmod4G(n1,n2) (!(((n1)-(n2)) & 0x80000000L))
#define tcp_Gmod4G(n1,n2) (!!(((n2)-(n1)) & 0x80000000L))
#define tcp_LEmod4G(n1,n2) (!(((n2)-(n1)) & 0x80000000L))
#endif /* TCP_INT_H */
/*
* $PchId: tcp_int.h,v 1.17 2005/06/28 14:21:08 philip Exp $
*/
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