LXR qemu/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
  18struct 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      struct sockaddr_in6 sin6;
  38  } fhost;
  39#define so_faddr fhost.sin.sin_addr
  40#define so_fport fhost.sin.sin_port
  41#define so_faddr6 fhost.sin6.sin6_addr
  42#define so_fport6 fhost.sin6.sin6_port
  43#define so_ffamily fhost.ss.ss_family
  44
  45  union {   /* local host */
  46      struct sockaddr_storage ss;
  47      struct sockaddr_in sin;
  48      struct sockaddr_in6 sin6;
  49  } lhost;
  50#define so_laddr lhost.sin.sin_addr
  51#define so_lport lhost.sin.sin_port
  52#define so_laddr6 lhost.sin6.sin6_addr
  53#define so_lport6 lhost.sin6.sin6_port
  54#define so_lfamily lhost.ss.ss_family
  55
  56  uint8_t       so_iptos;       /* Type of service */
  57  uint8_t       so_emu;         /* Is the socket emulated? */
  58
  59  u_char        so_type;                /* Type of socket, UDP or TCP */
  60  int   so_state;               /* internal state flags SS_*, below */
  61
  62  struct        tcpcb *so_tcpcb;        /* pointer to TCP protocol control block */
  63  u_int so_expire;              /* When the socket will expire */
  64
  65  int   so_queued;              /* Number of packets queued from this socket */
  66  int   so_nqueued;             /* Number of packets queued in a row
  67                                 * Used to determine when to "downgrade" a session
  68                                         * from fastq to batchq */
  69
  70  struct sbuf so_rcv;           /* Receive buffer */
  71  struct sbuf so_snd;           /* Send buffer */
  72  void * extra;                 /* Extra pointer */
  73};
  74
  75
  76/*
  77 * Socket state bits. (peer means the host on the Internet,
  78 * local host means the host on the other end of the modem)
  79 */
  80#define SS_NOFDREF              0x001   /* No fd reference */
  81
  82#define SS_ISFCONNECTING        0x002   /* Socket is connecting to peer (non-blocking connect()'s) */
  83#define SS_ISFCONNECTED         0x004   /* Socket is connected to peer */
  84#define SS_FCANTRCVMORE         0x008   /* Socket can't receive more from peer (for half-closes) */
  85#define SS_FCANTSENDMORE        0x010   /* Socket can't send more to peer (for half-closes) */
  86#define SS_FWDRAIN              0x040   /* We received a FIN, drain data and set SS_FCANTSENDMORE */
  87
  88#define SS_CTL                  0x080
  89#define SS_FACCEPTCONN          0x100   /* Socket is accepting connections from a host on the internet */
  90#define SS_FACCEPTONCE          0x200   /* If set, the SS_FACCEPTCONN socket will die after one accept */
  91
  92#define SS_PERSISTENT_MASK      0xf000  /* Unremovable state bits */
  93#define SS_HOSTFWD              0x1000  /* Socket describes host->guest forwarding */
  94#define SS_INCOMING             0x2000  /* Connection was initiated by a host on the internet */
  95
  96static inline int sockaddr_equal(struct sockaddr_storage *a,
  97        struct sockaddr_storage *b)
  98{
  99    if (a->ss_family != b->ss_family) {
 100        return 0;
 101    }
 102
 103    switch (a->ss_family) {
 104    case AF_INET:
 105    {
 106        struct sockaddr_in *a4 = (struct sockaddr_in *) a;
 107        struct sockaddr_in *b4 = (struct sockaddr_in *) b;
 108        return a4->sin_addr.s_addr == b4->sin_addr.s_addr
 109               && a4->sin_port == b4->sin_port;
 110    }
 111    case AF_INET6:
 112    {
 113        struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) a;
 114        struct sockaddr_in6 *b6 = (struct sockaddr_in6 *) b;
 115        return (in6_equal(&a6->sin6_addr, &b6->sin6_addr)
 116                && a6->sin6_port == b6->sin6_port);
 117    }
 118    default:
 119        g_assert_not_reached();
 120    }
 121
 122    return 0;
 123}
 124
 125struct socket *solookup(struct socket **, struct socket *,
 126        struct sockaddr_storage *, struct sockaddr_storage *);
 127struct socket *socreate(Slirp *);
 128void sofree(struct socket *);
 129int soread(struct socket *);
 130int sorecvoob(struct socket *);
 131int sosendoob(struct socket *);
 132int sowrite(struct socket *);
 133void sorecvfrom(struct socket *);
 134int sosendto(struct socket *, struct mbuf *);
 135struct socket * tcp_listen(Slirp *, uint32_t, u_int, uint32_t, u_int,
 136                               int);
 137void soisfconnecting(register struct socket *);
 138void soisfconnected(register struct socket *);
 139void sofwdrain(struct socket *);
 140struct iovec; /* For win32 */
 141size_t sopreprbuf(struct socket *so, struct iovec *iov, int *np);
 142int soreadbuf(struct socket *so, const char *buf, int size);
 143
 144void sotranslate_out(struct socket *, struct sockaddr_storage *);
 145void sotranslate_in(struct socket *, struct sockaddr_storage *);
 146void sotranslate_accept(struct socket *);
 147
 148
 149#endif /* _SOCKET_H_ */
 150