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 *));
size_t sopreprbuf(struct socket *so, struct iovec *iov, int *np);
int soreadbuf(struct socket *so, const char *buf, int size);

#endif /* _SOCKET_H_ */