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
  18union slirp_sockaddr {
  19    struct sockaddr_storage ss;
  20    struct sockaddr_in sin;
  21    struct sockaddr_in6 sin6;
  22};
  23
  24struct socket {
  25  struct socket *so_next,*so_prev;      /* For a linked list of sockets */
  26
  27  int s;                           /* The actual socket */
  28
  29  int pollfds_idx;                 /* GPollFD GArray index */
  30
  31  Slirp *slirp;                    /* managing slirp instance */
  32
  33                        /* XXX union these with not-yet-used sbuf params */
  34  struct mbuf *so_m;               /* Pointer to the original SYN packet,
  35                                    * for non-blocking connect()'s, and
  36                                    * PING reply's */
  37  struct tcpiphdr *so_ti;          /* Pointer to the original ti within
  38                                    * so_mconn, for non-blocking connections */
  39  uint32_t      so_urgc;
  40  union slirp_sockaddr fhost;      /* Foreign host */
  41#define so_faddr fhost.sin.sin_addr
  42#define so_fport fhost.sin.sin_port
  43#define so_faddr6 fhost.sin6.sin6_addr
  44#define so_fport6 fhost.sin6.sin6_port
  45#define so_ffamily fhost.ss.ss_family
  46
  47  union slirp_sockaddr lhost;      /* Local host */
  48#define so_laddr lhost.sin.sin_addr
  49#define so_lport lhost.sin.sin_port
  50#define so_laddr6 lhost.sin6.sin6_addr
  51#define so_lport6 lhost.sin6.sin6_port
  52#define so_lfamily lhost.ss.ss_family
  53
  54  uint8_t       so_iptos;       /* Type of service */
  55  uint8_t       so_emu;         /* Is the socket emulated? */
  56
  57  uint8_t       so_type;        /* Type of socket, UDP or TCP */
  58  int32_t       so_state;       /* internal state flags SS_*, below */
  59
  60  struct        tcpcb *so_tcpcb;        /* pointer to TCP protocol control block */
  61  u_int so_expire;              /* When the socket will expire */
  62
  63  int   so_queued;              /* Number of packets queued from this socket */
  64  int   so_nqueued;             /* Number of packets queued in a row
  65                                 * Used to determine when to "downgrade" a session
  66                                         * from fastq to batchq */
  67
  68  struct sbuf so_rcv;           /* Receive buffer */
  69  struct sbuf so_snd;           /* Send buffer */
  70  void * extra;                 /* Extra pointer */
  71};
  72
  73
  74/*
  75 * Socket state bits. (peer means the host on the Internet,
  76 * local host means the host on the other end of the modem)
  77 */
  78#define SS_NOFDREF              0x001   /* No fd reference */
  79
  80#define SS_ISFCONNECTING        0x002   /* Socket is connecting to peer (non-blocking connect()'s) */
  81#define SS_ISFCONNECTED         0x004   /* Socket is connected to peer */
  82#define SS_FCANTRCVMORE         0x008   /* Socket can't receive more from peer (for half-closes) */
  83#define SS_FCANTSENDMORE        0x010   /* Socket can't send more to peer (for half-closes) */
  84#define SS_FWDRAIN              0x040   /* We received a FIN, drain data and set SS_FCANTSENDMORE */
  85
  86#define SS_CTL                  0x080
  87#define SS_FACCEPTCONN          0x100   /* Socket is accepting connections from a host on the internet */
  88#define SS_FACCEPTONCE          0x200   /* If set, the SS_FACCEPTCONN socket will die after one accept */
  89
  90#define SS_PERSISTENT_MASK      0xf000  /* Unremovable state bits */
  91#define SS_HOSTFWD              0x1000  /* Socket describes host->guest forwarding */
  92#define SS_INCOMING             0x2000  /* Connection was initiated by a host on the internet */
  93
  94static inline int sockaddr_equal(struct sockaddr_storage *a,
  95        struct sockaddr_storage *b)
  96{
  97    if (a->ss_family != b->ss_family) {
  98        return 0;
  99    }
 100
 101    switch (a->ss_family) {
 102    case AF_INET:
 103    {
 104        struct sockaddr_in *a4 = (struct sockaddr_in *) a;
 105        struct sockaddr_in *b4 = (struct sockaddr_in *) b;
 106        return a4->sin_addr.s_addr == b4->sin_addr.s_addr
 107               && a4->sin_port == b4->sin_port;
 108    }
 109    case AF_INET6:
 110    {
 111        struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) a;
 112        struct sockaddr_in6 *b6 = (struct sockaddr_in6 *) b;
 113        return (in6_equal(&a6->sin6_addr, &b6->sin6_addr)
 114                && a6->sin6_port == b6->sin6_port);
 115    }
 116    default:
 117        g_assert_not_reached();
 118    }
 119
 120    return 0;
 121}
 122
 123static inline socklen_t sockaddr_size(struct sockaddr_storage *a)
 124{
 125    switch (a->ss_family) {
 126    case AF_INET:
 127        return sizeof(struct sockaddr_in);
 128    case AF_INET6:
 129        return sizeof(struct sockaddr_in6);
 130    default:
 131        g_assert_not_reached();
 132    }
 133}
 134
 135struct socket *solookup(struct socket **, struct socket *,
 136        struct sockaddr_storage *, struct sockaddr_storage *);
 137struct socket *socreate(Slirp *);
 138void sofree(struct socket *);
 139int soread(struct socket *);
 140int sorecvoob(struct socket *);
 141int sosendoob(struct socket *);
 142int sowrite(struct socket *);
 143void sorecvfrom(struct socket *);
 144int sosendto(struct socket *, struct mbuf *);
 145struct socket * tcp_listen(Slirp *, uint32_t, u_int, uint32_t, u_int,
 146                               int);
 147void soisfconnecting(register struct socket *);
 148void soisfconnected(register struct socket *);
 149void sofwdrain(struct socket *);
 150struct iovec; /* For win32 */
 151size_t sopreprbuf(struct socket *so, struct iovec *iov, int *np);
 152int soreadbuf(struct socket *so, const char *buf, int size);
 153
 154void sotranslate_out(struct socket *, struct sockaddr_storage *);
 155void sotranslate_in(struct socket *, struct sockaddr_storage *);
 156void sotranslate_accept(struct socket *);
 157
 158
 159#endif /* SLIRP_SOCKET_H */
 160