slirp/socket.h

   1 /*
   2  * Copyright (c) 1995 Danny Gasparovski.
   3  *
   4  * Please read the file COPYRIGHT for the
   5  * terms and conditions of the copyright.
   6  */
   7
   8 #ifndef _SLIRP_SOCKET_H_
   9 #define _SLIRP_SOCKET_H_
  10
  11 #define SO_EXPIRE 240000
  12 #define SO_EXPIREFAST 10000
  13
  14 /*
  15  * Our socket structure
  16  */
  17
  18 struct socket {
  19   struct socket *so_next,*so_prev;      /* For a linked list of sockets */
  20
  21   int s;                           /* The actual socket */
  22
  23   Slirp *slirp;                    /* managing slirp instance */
  24
  25                         /* XXX union these with not-yet-used sbuf params */
  26   struct mbuf *so_m;               /* Pointer to the original SYN packet,
  27                                     * for non-blocking connect()'s, and
  28                                     * PING reply's */
  29   struct tcpiphdr *so_ti;          /* Pointer to the original ti within
  30                                     * so_mconn, for non-blocking connections */
  31   int so_urgc;
  32   struct in_addr so_faddr;         /* foreign host table entry */
  33   struct in_addr so_laddr;         /* local host table entry */
  34   u_int16_t so_fport;              /* foreign port */
  35   u_int16_t so_lport;              /* local port */
  36
  37   u_int8_t      so_iptos;       /* Type of service */
  38   u_int8_t      so_emu;         /* Is the socket emulated? */
  39
  40   u_char        so_type;                /* Type of socket, UDP or TCP */
  41   int   so_state;               /* internal state flags SS_*, below */
  42
  43   struct        tcpcb *so_tcpcb;        /* pointer to TCP protocol control block */
  44   u_int so_expire;              /* When the socket will expire */
  45
  46   int   so_queued;              /* Number of packets queued from this socket */
  47   int   so_nqueued;             /* Number of packets queued in a row
  48                                  * Used to determine when to "downgrade" a session
  49                                          * from fastq to batchq */
  50
  51   struct sbuf so_rcv;           /* Receive buffer */
  52   struct sbuf so_snd;           /* Send buffer */
  53   void * extra;                 /* Extra pointer */
  54 };
  55
  56
  57 /*
  58  * Socket state bits. (peer means the host on the Internet,
  59  * local host means the host on the other end of the modem)
  60  */
  61 #define SS_NOFDREF              0x001   /* No fd reference */
  62
  63 #define SS_ISFCONNECTING        0x002   /* Socket is connecting to peer (non-blocking connect()'s) */
  64 #define SS_ISFCONNECTED         0x004   /* Socket is connected to peer */
  65 #define SS_FCANTRCVMORE         0x008   /* Socket can't receive more from peer (for half-closes) */
  66 #define SS_FCANTSENDMORE        0x010   /* Socket can't send more to peer (for half-closes) */
  67 #define SS_FWDRAIN              0x040   /* We received a FIN, drain data and set SS_FCANTSENDMORE */
  68
  69 #define SS_CTL                  0x080
  70 #define SS_FACCEPTCONN          0x100   /* Socket is accepting connections from a host on the internet */
  71 #define SS_FACCEPTONCE          0x200   /* If set, the SS_FACCEPTCONN socket will die after one accept */
  72
  73 #define SS_PERSISTENT_MASK      0xf000  /* Unremovable state bits */
  74 #define SS_HOSTFWD              0x1000  /* Socket describes host->guest forwarding */
  75 #define SS_INCOMING             0x2000  /* Connection was initiated by a host on the internet */
  76
  77 struct socket * solookup(struct socket *, struct in_addr, u_int, struct in_addr, u_int);
  78 struct socket * socreate(Slirp *);
  79 void sofree(struct socket *);
  80 int soread(struct socket *);
  81 void sorecvoob(struct socket *);
  82 int sosendoob(struct socket *);
  83 int sowrite(struct socket *);
  84 void sorecvfrom(struct socket *);
  85 int sosendto(struct socket *, struct mbuf *);
  86 struct socket * tcp_listen(Slirp *, u_int32_t, u_int, u_int32_t, u_int,
  87                                int);
  88 void soisfconnecting(register struct socket *);
  89 void soisfconnected(register struct socket *);
  90 void sofwdrain(struct socket *);
  91 struct iovec; /* For win32 */
  92 size_t sopreprbuf(struct socket *so, struct iovec *iov, int *np);
  93 int soreadbuf(struct socket *so, const char *buf, int size);
  94
  95 #endif /* _SOCKET_H_ */