| 1 | /*
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| 2 | * Copyright (c) 1995 Danny Gasparovski.
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| 3 | *
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| 4 | * Please read the file COPYRIGHT for the
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| 5 | * terms and conditions of the copyright.
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| 6 | */
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| 7 |
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| 8 | /* MINE */
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| 9 |
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| 10 | #ifndef _SLIRP_SOCKET_H_
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| 11 | #define _SLIRP_SOCKET_H_
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| 12 | #ifdef VBOX_WITH_SLIRP_MT
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| 13 | #include <iprt/critsect.h>
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| 14 | #endif
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| 15 |
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| 16 | #define SO_EXPIRE 240000
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| 17 | #define SO_EXPIREFAST 10000
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| 18 |
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| 19 | /*
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| 20 | * Our socket structure
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| 21 | */
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| 22 |
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| 23 | struct socket
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| 24 | {
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| 25 | struct socket *so_next;
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| 26 | struct socket *so_prev; /* For a linked list of sockets */
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| 27 |
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| 28 | #if !defined(RT_OS_WINDOWS)
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| 29 | int s; /* The actual socket */
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| 30 | #else
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| 31 | union {
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| 32 | int s;
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| 33 | HANDLE sh;
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| 34 | };
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| 35 | uint64_t so_icmp_id; /* XXX: hack */
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| 36 | uint64_t so_icmp_seq; /* XXX: hack */
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| 37 | #endif
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| 38 |
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| 39 | /* XXX union these with not-yet-used sbuf params */
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| 40 | struct mbuf *so_m; /* Pointer to the original SYN packet,
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| 41 | * for non-blocking connect()'s, and
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| 42 | * PING reply's */
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| 43 | struct tcpiphdr *so_ti; /* Pointer to the original ti within
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| 44 | * so_mconn, for non-blocking connections */
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| 45 | int so_urgc;
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| 46 | struct in_addr so_faddr; /* foreign host table entry */
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| 47 | struct in_addr so_laddr; /* local host table entry */
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| 48 | u_int16_t so_fport; /* foreign port */
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| 49 | u_int16_t so_lport; /* local port */
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| 50 | u_int16_t so_hlport; /* host local port */
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| 51 | struct in_addr so_hladdr; /* local host addr */
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| 52 |
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| 53 | u_int8_t so_iptos; /* Type of service */
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| 54 | u_int8_t so_emu; /* Is the socket emulated? */
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| 55 |
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| 56 | u_char so_type; /* Type of socket, UDP or TCP */
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| 57 | int so_state; /* internal state flags SS_*, below */
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| 58 |
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| 59 | struct tcpcb *so_tcpcb; /* pointer to TCP protocol control block */
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| 60 | u_int so_expire; /* When the socket will expire */
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| 61 |
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| 62 | int so_queued; /* Number of packets queued from this socket */
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| 63 | int so_nqueued; /* Number of packets queued in a row
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| 64 | * Used to determine when to "downgrade" a session
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| 65 | * from fastq to batchq */
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| 66 |
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| 67 | struct sbuf so_rcv; /* Receive buffer */
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| 68 | struct sbuf so_snd; /* Send buffer */
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| 69 | #ifdef VBOX_WITH_SLIRP_MT
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| 70 | RTCRITSECT so_mutex;
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| 71 | int so_deleted;
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| 72 | #endif
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| 73 | #ifndef RT_OS_WINDOWS
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| 74 | int so_poll_index;
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| 75 | #else /* !RT_OS_WINDOWS */
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| 76 | /*
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| 77 | * FD_CLOSE event has been occured on socket
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| 78 | */
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| 79 | int so_close;
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| 80 | #endif /* RT_OS_WINDOWS */
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| 81 | #ifdef VBOX_WITH_SLIRP_DNS_PROXY
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| 82 | void (* so_timeout)(PNATState pData, struct socket *so, void *arg);
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| 83 | void *so_timeout_arg;
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| 84 | #endif
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| 85 | #ifdef VBOX_WITH_NAT_SERVICE
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| 86 | /* storage of source ether address */
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| 87 | unsigned char so_ethaddr[6];
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| 88 | #endif
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| 89 | };
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| 90 |
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| 91 | #ifdef VBOX_WITH_SLIRP_MT
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| 92 | # define SOCKET_LOCK(so) \
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| 93 | do { \
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| 94 | int rc; \
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| 95 | /* Assert(strcmp(RTThreadSelfName(), "EMT") != 0); */ \
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| 96 | Log2(("lock:%s:%d L on %R[natsock]\n", __FUNCTION__, __LINE__, (so))); \
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| 97 | Assert(!RTCritSectIsOwner(&(so)->so_mutex)); \
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| 98 | rc = RTCritSectEnter(&(so)->so_mutex); \
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| 99 | AssertReleaseRC(rc); \
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| 100 | } while (0)
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| 101 | # define SOCKET_UNLOCK(so) \
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| 102 | do { \
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| 103 | int rc; \
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| 104 | if ((so) != NULL) Log2(("lock:%s:%d U on %R[natsock]\n", __FUNCTION__, __LINE__, (so))); \
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| 105 | rc = RTCritSectLeave(&(so)->so_mutex); \
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| 106 | AssertReleaseRC(rc); \
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| 107 | } while (0)
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| 108 | # define SOCKET_LOCK_CREATE(so) \
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| 109 | do { \
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| 110 | int rc; \
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| 111 | rc = RTCritSectInit(&(so)->so_mutex); \
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| 112 | AssertReleaseRC(rc); \
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| 113 | } while (0)
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| 114 | # define SOCKET_LOCK_DESTROY(so) \
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| 115 | do { \
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| 116 | int rc = RTCritSectDelete(&(so)->so_mutex); \
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| 117 | AssertReleaseRC(rc); \
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| 118 | } while (0)
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| 119 | #else
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| 120 | # define SOCKET_LOCK(so) do {} while (0)
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| 121 | # define SOCKET_UNLOCK(so) do {} while (0)
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| 122 | # define SOCKET_LOCK_CREATE(so) do {} while (0)
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| 123 | # define SOCKET_LOCK_DESTROY(so) do {} while (0)
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| 124 | #endif
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| 125 | /*
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| 126 | * Socket state bits. (peer means the host on the Internet,
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| 127 | * local host means the host on the other end of the modem)
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| 128 | */
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| 129 | #define SS_NOFDREF 0x001 /* No fd reference */
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| 130 |
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| 131 | #define SS_ISFCONNECTING 0x002 /* Socket is connecting to peer (non-blocking connect()'s) */
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| 132 | #define SS_ISFCONNECTED 0x004 /* Socket is connected to peer */
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| 133 | #define SS_FCANTRCVMORE 0x008 /* Socket can't receive more from peer (for half-closes) */
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| 134 | #define SS_FCANTSENDMORE 0x010 /* Socket can't send more to peer (for half-closes) */
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| 135 | /* #define SS_ISFDISCONNECTED 0x020*/ /* Socket has disconnected from peer, in 2MSL state */
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| 136 | #define SS_FWDRAIN 0x040 /* We received a FIN, drain data and set SS_FCANTSENDMORE */
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| 137 |
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| 138 | /* #define SS_CTL 0x080 */
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| 139 | #define SS_FACCEPTCONN 0x100 /* Socket is accepting connections from a host on the internet */
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| 140 | #define SS_FACCEPTONCE 0x200 /* If set, the SS_FACCEPTCONN socket will die after one accept */
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| 141 |
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| 142 | extern struct socket tcb;
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| 143 |
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| 144 | #if defined(DECLARE_IOVEC) && !defined(HAVE_READV)
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| 145 | struct iovec
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| 146 | {
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| 147 | char *iov_base;
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| 148 | size_t iov_len;
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| 149 | };
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| 150 | #endif
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| 151 |
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| 152 | void so_init _P((void));
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| 153 | struct socket * solookup _P((struct socket *, struct in_addr, u_int, struct in_addr, u_int));
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| 154 | struct socket * socreate _P((void));
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| 155 | void sofree _P((PNATState, struct socket *));
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| 156 | #ifdef VBOX_WITH_SLIRP_MT
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| 157 | void soread_queue (PNATState, struct socket *, int *);
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| 158 | #endif
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| 159 | int soread _P((PNATState, struct socket *));
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| 160 | void sorecvoob _P((PNATState, struct socket *));
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| 161 | int sosendoob _P((struct socket *));
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| 162 | int sowrite _P((PNATState, struct socket *));
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| 163 | void sorecvfrom _P((PNATState, struct socket *));
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| 164 | int sosendto _P((PNATState, struct socket *, struct mbuf *));
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| 165 | struct socket * solisten _P((PNATState, u_int, u_int32_t, u_int, int));
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| 166 | void sorwakeup _P((struct socket *));
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| 167 | void sowwakeup _P((struct socket *));
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| 168 | void soisfconnecting _P((register struct socket *));
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| 169 | void soisfconnected _P((register struct socket *));
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| 170 | void sofcantrcvmore _P((struct socket *));
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| 171 | void sofcantsendmore _P((struct socket *));
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| 172 | void soisfdisconnected _P((struct socket *));
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| 173 | void sofwdrain _P((struct socket *));
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| 174 |
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| 175 | #endif /* _SOCKET_H_ */
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