sflsock.h

短小精悍的C语言标准函数库。提供450个以上的可移植的算法和工具代码。

    int    s_port;
    char  *s_proto;
};
#endif

/*---------------------------------------------------------------------------
 *  Required definitions
 *
 *  These are symbols used by calling programs: if the compiler does not
 *  define them, we do it.
 */

#if (!defined (EWOULDBLOCK))            /*  BSD tends to use EWOULDBLOCK     */
#   if (defined (__WINDOWS__))
#       define EWOULDBLOCK  WSAEWOULDBLOCK
#   else
#       define EWOULDBLOCK  -1
#   endif
#endif

#if (!defined (EINPROGRESS))            /*  Return code for asynch I/O       */
#   if (defined (__WINDOWS__))
#       define EINPROGRESS  WSAEINPROGRESS
#   else
#       define EINPROGRESS  EWOULDBLOCK
#   endif
#endif

#if (!defined (EAGAIN))                 /*  Return code for asynch I/O       */
#   define EAGAIN           EWOULDBLOCK
#endif

#if (!defined (EPIPE))                  /*  Return code for closed socket    */
#   define EPIPE            -1
#endif

#if (!defined (ECONNRESET))             /*  Return code for closed socket    */
#   if (defined (__WINDOWS__))
#       define ECONNRESET   WSAECONNRESET
#   else
#       define ECONNRESET   EPIPE
#   endif
#endif

#if (defined (__UTYPE_HPUX))
#   define FD_SETTYPE (int *)           /*  Some systems use the older       */
#else                                   /*    select() format                */
#   define FD_SETTYPE                   /*  Most use fd_set's                */
#endif

#if (!defined (MAXHOSTNAMELEN))         /*  Some guys don't define this      */
#   define MAXHOSTNAMELEN   256         /*    constant                       */
#endif
#if (!defined (INADDR_NONE))            /*  Some guys don't define this      */
#   define INADDR_NONE      -1          /*    constant                       */
#endif


/*---------------------------------------------------------------------------
 *  Error values returned by connect_error(). These reflect the last problem
 *  detected by one of the passive/connect connection functions.
 */

#define IP_NOERROR          0           /*  No errors                        */
#define IP_NOSOCKETS        1           /*  Sockets not supported            */
#define IP_BADHOST          2           /*  Host not known                   */
#define IP_BADSERVICE       3           /*  Service or port not known        */
#define IP_BADPROTOCOL      4           /*  Invalid protocol specified       */
#define IP_SOCKETERROR      5           /*  Error creating socket            */
#define IP_CONNECTERROR     6           /*  Error making connection          */
#define IP_BINDERROR        7           /*  Error binding socket             */
#define IP_LISTENERROR      8           /*  Error preparing to listen        */


/*---------------------------------------------------------------------------
 *  The ip_portbase is added to the port number when creating a service;
 *  you can set this variable before calling passive_TCP or passive_UDP.
 */

extern int
    ip_portbase;

/*---------------------------------------------------------------------------
 *  The ip_nonblock flag determines whether sockets are blocking or not.
 *  Under Windows sockets are never blocking.  Under UNIX they may be, or
 *  not.  For portability to Windows, this flag is set to TRUE by default.
 *  The main consequence of this is that after a connect_xxx() call you may
 *  need to perform a select() on the socket for writing to determine when
 *  the connection has suceeded.
 */

extern Bool
    ip_nonblock;

/*---------------------------------------------------------------------------
 *  The connect_errlist table provides messages for the connect_error()
 *  values.
 */

extern char
    *connect_errlist [];

/*---------------------------------------------------------------------------
 *  The ip_passive address is used for passive socket connections.  Initially
 *  this is set to INADDR_ANY.  It is used for one passive socket creation
 *  and reset to INADDR_ANY thereafter.
 */

extern qbyte
    ip_passive;

extern int
    ip_sockets;                         /*  Number of open sockets           */


/*---------------------------------------------------------------------------
 *  Function prototypes
 */

#ifdef __cplusplus
extern "C" {
#endif

int    sock_init            (void);
int    sock_term            (void);
sock_t passive_TCP          (const char *service, int queue);
sock_t passive_UDP          (const char *service);
sock_t passive_socket       (const char *service, const char *protocol,
                             int queue);
sock_t connect_TCP          (const char *host, const char *service);
sock_t connect_UDP          (const char *host, const char *service);
sock_t connect_TCP_fast     (const struct sockaddr_in *sin);
sock_t connect_UDP_fast     (const struct sockaddr_in *sin);
sock_t connect_socket       (const char *host, const char *service, const char
                             *protocol, const struct sockaddr_in *sin,
                             int retry_max, int retry_delay);
int    connect_to_peer      (sock_t handle,
                             const struct sockaddr_in *sin);
int    connect_error        (void);
sock_t accept_socket        (sock_t master);
sock_t create_socket        (const char *protocol);
int    address_end_point    (const char *host, const char *service, const
                             char *protocol, struct sockaddr_in *sin);
int    get_sock_addr        (sock_t handle, struct sockaddr_in *sin,
                             char *name, int namesize);
int    get_peer_addr        (sock_t handle, struct sockaddr_in *sin,
                             char *name, int namesize);
void   build_sockaddr       (struct sockaddr_in *sin, qbyte host, dbyte port);
char  *socket_localaddr     (sock_t handle);
char  *socket_peeraddr      (sock_t handle);
Bool   socket_is_alive      (sock_t handle);
int    socket_error         (sock_t handle);
int    socket_nodelay       (sock_t handle);
int    read_TCP             (sock_t handle, void *buffer, size_t length);
int    write_TCP            (sock_t handle, const void *buffer, size_t length);
int    read_UDP             (sock_t handle, void *buffer, size_t length,
                             const struct sockaddr_in *sin);
int    write_UDP            (sock_t handle, const void *buffer, size_t length,
                             const struct sockaddr_in *sin);
int    close_socket         (sock_t handle);
int    sock_select          (int nfds, fd_set *readfds, fd_set *writefds,
                             fd_set *errorfds, struct timeval *timeout);
char  *get_hostname         (void);
qbyte  get_hostaddr         (void);
qbyte *get_hostaddrs        (void);
const  char *sockmsg        (void);
Bool   socket_is_permitted  (const char *address, const char *mask);
char  *sock_ntoa            (qbyte address);
char  *get_host_file        (void);
int    get_name_server      (struct sockaddr_in *ns_address, int ns_max);

#if (defined (__WINDOWS__))
int    winsock_last_error   (void);
#endif

#ifdef __cplusplus
}
#endif

/*  Macros for compatibility with previous versions                          */
#define socket_hostaddr(handle) socket_peeraddr (handle)


#endif                                  /*  Include sflsock.h                */