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   int pollfds_idx;                 /* GPollFD GArray index */
  24
  25   Slirp *slirp;                    /* managing slirp instance */
  26
  27                         /* XXX union these with not-yet-used sbuf params */
  28   struct mbuf *so_m;               /* Pointer to the original SYN packet,
  29                                     * for non-blocking connect()'s, and
  30                                     * PING reply's */
  31   struct tcpiphdr *so_ti;          /* Pointer to the original ti within
  32                                     * so_mconn, for non-blocking connections */
  33   int so_urgc;
  34   struct in_addr so_faddr;         /* foreign host table entry */
  35   struct in_addr so_laddr;         /* local host table entry */
  36   uint16_t so_fport;               /* foreign port */
  37   uint16_t so_lport;               /* local port */
  38
  39   uint8_t       so_iptos;       /* Type of service */
  40   uint8_t       so_emu;         /* Is the socket emulated? */
  41
  42   u_char        so_type;                /* Type of socket, UDP or TCP */
  43   int   so_state;               /* internal state flags SS_*, below */
  44
  45   struct        tcpcb *so_tcpcb;        /* pointer to TCP protocol control block */
  46   u_int so_expire;              /* When the socket will expire */
  47
  48   int   so_queued;              /* Number of packets queued from this socket */
  49   int   so_nqueued;             /* Number of packets queued in a row
  50                                  * Used to determine when to "downgrade" a session
  51                                          * from fastq to batchq */
  52
  53   struct sbuf so_rcv;           /* Receive buffer */
  54   struct sbuf so_snd;           /* Send buffer */
  55   void * extra;                 /* Extra pointer */
  56 };
  57
  58
  59 /*
  60  * Socket state bits. (peer means the host on the Internet,
  61  * local host means the host on the other end of the modem)
  62  */
  63 #define SS_NOFDREF              0x001   /* No fd reference */
  64
  65 #define SS_ISFCONNECTING        0x002   /* Socket is connecting to peer (non-blocking connect()'s) */
  66 #define SS_ISFCONNECTED         0x004   /* Socket is connected to peer */
  67 #define SS_FCANTRCVMORE         0x008   /* Socket can't receive more from peer (for half-closes) */
  68 #define SS_FCANTSENDMORE        0x010   /* Socket can't send more to peer (for half-closes) */
  69 #define SS_FWDRAIN              0x040   /* We received a FIN, drain data and set SS_FCANTSENDMORE */
  70
  71 #define SS_CTL                  0x080
  72 #define SS_FACCEPTCONN          0x100   /* Socket is accepting connections from a host on the internet */
  73 #define SS_FACCEPTONCE          0x200   /* If set, the SS_FACCEPTCONN socket will die after one accept */
  74
  75 #define SS_PERSISTENT_MASK      0xf000  /* Unremovable state bits */
  76 #define SS_HOSTFWD              0x1000  /* Socket describes host->guest forwarding */
  77 #define SS_INCOMING             0x2000  /* Connection was initiated by a host on the internet */
  78
  79 struct socket * solookup(struct socket *, struct in_addr, u_int, struct in_addr, u_int);
  80 struct socket * socreate(Slirp *);
  81 void sofree(struct socket *);
  82 int soread(struct socket *);
  83 void sorecvoob(struct socket *);
  84 int sosendoob(struct socket *);
  85 int sowrite(struct socket *);
  86 void sorecvfrom(struct socket *);
  87 int sosendto(struct socket *, struct mbuf *);
  88 struct socket * tcp_listen(Slirp *, uint32_t, u_int, uint32_t, u_int,
  89                                int);
  90 void soisfconnecting(register struct socket *);
  91 void soisfconnected(register struct socket *);
  92 void sofwdrain(struct socket *);
  93 struct iovec; /* For win32 */
  94 size_t sopreprbuf(struct socket *so, struct iovec *iov, int *np);
  95 int soreadbuf(struct socket *so, const char *buf, int size);
  96
  97 #endif /* _SOCKET_H_ */