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socket.h

/*
 * Copyright (c) 1995 Danny Gasparovski.
 *
 * Please read the file COPYRIGHT for the
 * terms and conditions of the copyright.
 */

/* MINE */

#ifndef _SLIRP_SOCKET_H_
#define _SLIRP_SOCKET_H_

#define SO_EXPIRE 240000
#define SO_EXPIREFAST 10000

/*
 * Our socket structure
 */

struct socket {
  struct socket *so_next,*so_prev;      /* For a linked list of sockets */

  int s;                           /* The actual socket */

                  /* XXX union these with not-yet-used sbuf params */
  struct mbuf *so_m;               /* Pointer to the original SYN packet,
                            * for non-blocking connect()'s, and
                            * PING reply's */
  struct tcpiphdr *so_ti;        /* Pointer to the original ti within
                            * so_mconn, for non-blocking connections */
  int so_urgc;
  struct in_addr so_faddr;       /* foreign host table entry */
  struct in_addr so_laddr;       /* local host table entry */
  u_int16_t so_fport;            /* foreign port */
  u_int16_t so_lport;            /* local port */

  u_int8_t  so_iptos;   /* Type of service */
  u_int8_t  so_emu;           /* Is the socket emulated? */

  u_char    so_type;          /* Type of socket, UDP or TCP */
  int so_state;         /* internal state flags SS_*, below */

  struct    tcpcb *so_tcpcb;  /* pointer to TCP protocol control block */
  u_int     so_expire;        /* When the socket will expire */

  int so_queued;        /* Number of packets queued from this socket */
  int so_nqueued;       /* Number of packets queued in a row
                         * Used to determine when to "downgrade" a session
                               * from fastq to batchq */

  struct sbuf so_rcv;         /* Receive buffer */
  struct sbuf so_snd;         /* Send buffer */
  void * extra;               /* Extra pointer */
};


/*
 * Socket state bits. (peer means the host on the Internet,
 * local host means the host on the other end of the modem)
 */
#define SS_NOFDREF            0x001 /* No fd reference */

#define SS_ISFCONNECTING      0x002 /* Socket is connecting to peer (non-blocking connect()'s) */
#define SS_ISFCONNECTED       0x004 /* Socket is connected to peer */
#define SS_FCANTRCVMORE       0x008 /* Socket can't receive more from peer (for half-closes) */
#define SS_FCANTSENDMORE      0x010 /* Socket can't send more to peer (for half-closes) */
/* #define SS_ISFDISCONNECTED 0x020*/     /* Socket has disconnected from peer, in 2MSL state */
#define SS_FWDRAIN            0x040 /* We received a FIN, drain data and set SS_FCANTSENDMORE */

#define SS_CTL                0x080
#define SS_FACCEPTCONN        0x100 /* Socket is accepting connections from a host on the internet */
#define SS_FACCEPTONCE        0x200 /* If set, the SS_FACCEPTCONN socket will die after one accept */

extern struct socket tcb;

struct socket * solookup _P((struct socket *, struct in_addr, u_int, struct in_addr, u_int));
struct socket * socreate _P((void));
void sofree _P((struct socket *));
int soread _P((struct socket *));
void sorecvoob _P((struct socket *));
int sosendoob _P((struct socket *));
int sowrite _P((struct socket *));
void sorecvfrom _P((struct socket *));
int sosendto _P((struct socket *, struct mbuf *));
struct socket * solisten _P((u_int, u_int32_t, u_int, int));
void soisfconnecting _P((register struct socket *));
void soisfconnected _P((register struct socket *));
void soisfdisconnected _P((struct socket *));
void sofwdrain _P((struct socket *));

#endif /* _SOCKET_H_ */

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