source: libcf/trunk/src/cf_socket.c@ 4

/**
 * cf_socket.c
 */
#include "cf_socket.h"
#include "cf_local.h"

#ifdef _WIN32
# include <WinSock2.h>
#else
# include <netinet/in.h>
# include <sys/socket.h>
# include <arpa/inet.h>
# include <netdb.h>
# include <unistd.h>
#endif

#include <string.h>

#define CHECK_SOCKET_INIT()                 \
    if (!CF_Socket_IsInitialized ())        \
        return CF_ERROR_SOCKET_NOT_INITIALIZED 

#define CHECK_INVALID_SOCKET(__sock)        \
    if (__sock < 0)                     \
        return CF_ERROR_SOCKET_INVALID_SOCKET

E_CF_BOOL gInitialized = CF_FALSE;

E_CF_BOOL
CF_Socket_IsInitialized (void)
{
    return gInitialized;
}

int
CF_Socket_Initialize (void)
{
    int result = 0;

#ifdef WIN32
    WSADATA winsockData;
    result = WSAStartup (MAKEWORD (2, 0), &winsockData);
#endif
    gInitialized = CF_TRUE;

    if (result != 0)
       return CF_ERROR_SOCKET_INITIALIZE;
    
    return CF_OK;
}

int
CF_Socket_Finalize (void)
{
    int result = 0;

    if (!CF_Socket_IsInitialized ())
        return CF_ERROR_SOCKET_NOT_INITIALIZED;

#ifdef WIN32
    result = WSACleanup ();
#endif
    if (result != 0)
       return CF_ERROR_SOCKET_FINALIZE;

    return CF_OK;
}

int
CF_Socket_Close (const int sock)
{
    int result = 0;

    CHECK_INVALID_SOCKET (sock);

    result = /* continued */
#ifdef _WIN32
        closesocket (socket);
#else
        close (sock);
#endif

    if (result != 0)
        return CF_ERROR_SOCKET_CLOSE;

    return CF_OK;
}

int
CF_Socket_SetOption (const int      sock,
                     const int      optname,
                     const void     * optval,
                     const size_t   optlen)
{
    int result = 0;

    CHECK_INVALID_SOCKET (sock);

    result = setsockopt (sock,
                         SOL_SOCKET,
                         optname,
#ifdef _WIN32
                         (char *) optval,
#else
                         optval,
#endif
                         (socklen_t) optlen);
    if (result < 0)
        return CF_ERROR_SOCKET_SET_OPTION;

    return CF_OK;
}

int
CF_Socket_GetOption (const int  sock,
                     const int  optname,
                     void       * optval,
                     size_t     * optlen)
{
    int result = 0;

    CHECK_INVALID_SOCKET (sock);

    result = getsockopt (sock,
                         SOL_SOCKET,
                         optname,
#ifdef _WIN32
                         (char *) optval,
#else
                         optval,
#endif
                         (socklen_t *) optlen);
    if (result < 0)
        return CF_ERROR_SOCKET_GET_OPTION;

    return CF_OK;
}

int
CF_Socket_SetTimeout (const int sock,
                      const int timeout)
{
    int result = 0;

    CHECK_INVALID_SOCKET (sock);

    if (timeout < 0)
        return CF_ERROR_SOCKET_INVALID_ARGS;

#ifndef _WIN32
    struct timeval  timeval;
    timeval.tv_sec = timeout;
    timeval.tv_usec= 0;
#else
    int             time_ms = timeout * 1000;
#endif

    result = CF_Socket_SetOption (sock,
                                  SO_RCVTIMEO,
#ifdef _WIN32
                                  &time_ms,
                                  sizeof (time_ms));
#else
                                  &timeval,
                                  sizeof (timeval));
#endif
    if (result < 0)
        return CF_ERROR_SOCKET_SET_TIMEOUT;
    /*----------------------------------------------------------------*/

    return CF_OK;
}

int
CF_Socket_Connect (const char           * ip,
                   const unsigned short port)
{
    int                 result = 0;
    int                 sock = 0;
    struct sockaddr_in  address;
    struct hostent      * hostEnt;

    CHECK_SOCKET_INIT ();

    sock = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (sock < 0)
        return CF_ERROR_SOCKET_CREATE;

    address.sin_family      = AF_INET;
    address.sin_port        = htons (port);
    address.sin_addr.s_addr = inet_addr (ip);

    TRY
    {
        if (address.sin_addr.s_addr == (unsigned int)-1)
        {
            hostEnt = gethostbyname (ip);
            if (hostEnt == NULL)
            {
                result = CF_ERROR_SOCKET_GET_HOST;
                TRY_BREAK;
            }

            address.sin_family = (sa_family_t) hostEnt->h_addrtype;
            memcpy (&(address.sin_addr.s_addr), hostEnt->h_addr, (size_t) hostEnt->h_length);
        }

        result = connect (sock, (struct sockaddr *) &address, sizeof (address));
        if (result < 0)
        {
            result = CF_ERROR_SOCKET_CONNECT;
            TRY_BREAK;
        }
    }
    CATCH_IF (result < 0)
    {
        CF_Socket_Close (sock);
        return result;
    }

    return CF_OK;
}

int
CF_Socket_Server (const unsigned short  port,
                  const int             backlog)
{
    int                 result = 0;
    int                 sock = 0;
    struct sockaddr_in  address;

    CHECK_SOCKET_INIT ();

    sock = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (sock < 0)
        return CF_ERROR_SOCKET_CREATE;

    address.sin_family      = AF_INET;
    address.sin_addr.s_addr = htonl (INADDR_ANY);
    address.sin_port        = htons (port);

    TRY {
        result = bind (sock, (struct sockaddr *) &address, sizeof (struct sockaddr));
        if (result < 0)
        {
            result = CF_ERROR_SOCKET_BIND;
            TRY_BREAK;
        }

        result = listen (sock, backlog);
        if (result < 0)
        {
            result = CF_ERROR_SOCKET_LISTEN;
            TRY_BREAK;
        }
    }
    CATCH_IF (result < 0)
    {
        CF_Socket_Close (sock);
        return result;
    }

    return sock;
}

int
CF_Socket_Accept (const int sock,
                  void      * address)
{
    int                 sockClient;
    struct sockaddr_in  remoteAddress;
    socklen_t           len = sizeof (remoteAddress);

    CHECK_INVALID_SOCKET (sock);

    sockClient = accept (sock, (struct sockaddr *) &remoteAddress, &len);
    if (sockClient < 0)
        return CF_ERROR_SOCKET_ACCEPT;

    if (address != NULL)
        memcpy ((void *) address, (void *) &remoteAddress, sizeof (struct sockaddr_in));

    return sockClient;
}

int
CF_Socket_Send (const int   sock,
                const void  * buf,
                const int   len)
{
    int result = 0;

    CHECK_INVALID_SOCKET (sock);

    result = (int) send (sock, buf, (size_t) len, 0);
    if (result != len)
        return CF_ERROR_SOCKET_SEND;

    return CF_OK;
}

int
CF_Socket_Recv (const int   sock,
                void        * buf,
                const int   len)
{
    int result = 0;

    CHECK_INVALID_SOCKET (sock);

    result = (int) recv (sock, buf, (size_t) len, 0);
    if (result < 0)
        return CF_ERROR_SOCKET_RECV;

    return result;
}