slirp/socket.h

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

#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 */

  int pollfds_idx;                 /* GPollFD GArray index */

  Slirp *slirp;                    /* managing slirp instance */

                        /* 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 */
  uint16_t so_fport;               /* foreign port */
  uint16_t so_lport;               /* local port */

  uint8_t       so_iptos;       /* Type of service */
  uint8_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_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 */

#define SS_PERSISTENT_MASK      0xf000  /* Unremovable state bits */
#define SS_HOSTFWD              0x1000  /* Socket describes host->guest forwarding */
#define SS_INCOMING             0x2000  /* Connection was initiated by a host on the internet */

struct socket * solookup(struct socket *, struct in_addr, u_int, struct in_addr, u_int);
struct socket * socreate(Slirp *);
void sofree(struct socket *);
int soread(struct socket *);
void sorecvoob(struct socket *);
int sosendoob(struct socket *);
int sowrite(struct socket *);
void sorecvfrom(struct socket *);
int sosendto(struct socket *, struct mbuf *);
struct socket * tcp_listen(Slirp *, uint32_t, u_int, uint32_t, u_int,
                               int);
void soisfconnecting(register struct socket *);
void soisfconnected(register struct socket *);
void sofwdrain(struct socket *);
struct iovec; /* For win32 */
size_t sopreprbuf(struct socket *so, struct iovec *iov, int *np);
int soreadbuf(struct socket *so, const char *buf, size_t size);

#endif /* _SOCKET_H_ */