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   union {   /* foreign host */
  35       struct sockaddr_storage ss;
  36       struct sockaddr_in sin;
  37   } fhost;
  38 #define so_faddr fhost.sin.sin_addr
  39 #define so_fport fhost.sin.sin_port
  40 #define so_ffamily fhost.ss.ss_family
  41
  42   union {   /* local host */
  43       struct sockaddr_storage ss;
  44       struct sockaddr_in sin;
  45   } lhost;
  46 #define so_laddr lhost.sin.sin_addr
  47 #define so_lport lhost.sin.sin_port
  48 #define so_lfamily lhost.ss.ss_family
  49
  50   uint8_t       so_iptos;       /* Type of service */
  51   uint8_t       so_emu;         /* Is the socket emulated? */
  52
  53   u_char        so_type;                /* Type of socket, UDP or TCP */
  54   int   so_state;               /* internal state flags SS_*, below */
  55
  56   struct        tcpcb *so_tcpcb;        /* pointer to TCP protocol control block */
  57   u_int so_expire;              /* When the socket will expire */
  58
  59   int   so_queued;              /* Number of packets queued from this socket */
  60   int   so_nqueued;             /* Number of packets queued in a row
  61                                  * Used to determine when to "downgrade" a session
  62                                          * from fastq to batchq */
  63
  64   struct sbuf so_rcv;           /* Receive buffer */
  65   struct sbuf so_snd;           /* Send buffer */
  66   void * extra;                 /* Extra pointer */
  67 };
  68
  69
  70 /*
  71  * Socket state bits. (peer means the host on the Internet,
  72  * local host means the host on the other end of the modem)
  73  */
  74 #define SS_NOFDREF              0x001   /* No fd reference */
  75
  76 #define SS_ISFCONNECTING        0x002   /* Socket is connecting to peer (non-blocking connect()'s) */
  77 #define SS_ISFCONNECTED         0x004   /* Socket is connected to peer */
  78 #define SS_FCANTRCVMORE         0x008   /* Socket can't receive more from peer (for half-closes) */
  79 #define SS_FCANTSENDMORE        0x010   /* Socket can't send more to peer (for half-closes) */
  80 #define SS_FWDRAIN              0x040   /* We received a FIN, drain data and set SS_FCANTSENDMORE */
  81
  82 #define SS_CTL                  0x080
  83 #define SS_FACCEPTCONN          0x100   /* Socket is accepting connections from a host on the internet */
  84 #define SS_FACCEPTONCE          0x200   /* If set, the SS_FACCEPTCONN socket will die after one accept */
  85
  86 #define SS_PERSISTENT_MASK      0xf000  /* Unremovable state bits */
  87 #define SS_HOSTFWD              0x1000  /* Socket describes host->guest forwarding */
  88 #define SS_INCOMING             0x2000  /* Connection was initiated by a host on the internet */
  89
  90 static inline int sockaddr_equal(struct sockaddr_storage *a,
  91         struct sockaddr_storage *b)
  92 {
  93     if (a->ss_family != b->ss_family) {
  94         return 0;
  95     }
  96
  97     switch (a->ss_family) {
  98     case AF_INET:
  99     {
 100         struct sockaddr_in *a4 = (struct sockaddr_in *) a;
 101         struct sockaddr_in *b4 = (struct sockaddr_in *) b;
 102         return a4->sin_addr.s_addr == b4->sin_addr.s_addr
 103                && a4->sin_port == b4->sin_port;
 104     }
 105     default:
 106         g_assert_not_reached();
 107     }
 108
 109     return 0;
 110 }
 111
 112 struct socket *solookup(struct socket **, struct socket *,
 113         struct sockaddr_storage *, struct sockaddr_storage *);
 114 struct socket *socreate(Slirp *);
 115 void sofree(struct socket *);
 116 int soread(struct socket *);
 117 void sorecvoob(struct socket *);
 118 int sosendoob(struct socket *);
 119 int sowrite(struct socket *);
 120 void sorecvfrom(struct socket *);
 121 int sosendto(struct socket *, struct mbuf *);
 122 struct socket * tcp_listen(Slirp *, uint32_t, u_int, uint32_t, u_int,
 123                                int);
 124 void soisfconnecting(register struct socket *);
 125 void soisfconnected(register struct socket *);
 126 void sofwdrain(struct socket *);
 127 struct iovec; /* For win32 */
 128 size_t sopreprbuf(struct socket *so, struct iovec *iov, int *np);
 129 int soreadbuf(struct socket *so, const char *buf, int size);
 130
 131 void sotranslate_out(struct socket *, struct sockaddr_storage *);
 132 void sotranslate_in(struct socket *, struct sockaddr_storage *);
 133 void sotranslate_accept(struct socket *);
 134
 135
 136 #endif /* _SOCKET_H_ */