src/utils/symbian

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This source file includes following definitions.
gf_net_get_ntp
gf_net_has_ipv6
gf_sk_get_ipv6_addr
gf_sk_ipv6_set_remote_address
gf_sk_get_host_name
gf_sk_get_local_ip
gf_sk_new
gf_sk_set_buffer_size
gf_sk_set_block_mode
gf_sk_gf_free
gf_sk_del
gf_sk_reset
gf_sk_get_handle
gf_sk_connect
gf_sk_bind
gf_sk_send
gf_sk_is_multicast_address
gf_sk_setup_multicast
gf_sk_receive
gf_sk_listen
gf_sk_accept
gf_sk_get_local_info
gf_sk_server_mode
gf_sk_get_remote_address
gf_sk_send_to
gf_sk_receive_wait
gf_sk_send_wait
NewSockGroup
SKG_Delete
SKG_SetWatchTime
SKG_AddSocket
SKG_RemoveSocket
SKG_IsSocketIN
SKG_Select
/*
 *                      GPAC - Multimedia Framework C SDK
 *
 *                      Authors: Jean Le Feuvre
 *                      Copyright (c) Telecom ParisTech 2005-2012
 *                                      All rights reserved
 *
 *  This file is part of GPAC / common tools sub-project
 *
 *  GPAC is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  GPAC is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */


#if defined(WIN32) || defined(_WIN32_WCE)

#ifdef _WIN32_WCE
#include <winsock.h>
#else
#include <sys/timeb.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#endif

#include <windows.h>

#if !defined(__GNUC__)

#if defined(IPV6_MULTICAST_IF)
#define GPAC_HAS_IPV6 1
#pragma message("Using WinSock IPV6")
#else
#undef GPAC_HAS_IPV6
#pragma message("Using WinSock IPV4")
#endif

#endif

/*common win32 redefs*/
#define EAGAIN                          WSAEWOULDBLOCK
#define EISCONN                         WSAEISCONN
#define ENOTCONN                        WSAENOTCONN
#define ECONNRESET                      WSAECONNRESET
#define EMSGSIZE                        WSAEMSGSIZE
#define ECONNABORTED                    WSAECONNABORTED
#define ENETDOWN                        WSAENETDOWN

#define LASTSOCKERROR WSAGetLastError()

/*the number of sockets used. This because the WinSock lib needs init*/
static int wsa_init = 0;

#include <gpac/network.h>

/*end-win32*/

#else
/*non-win32*/
#include <unistd.h>
#include <fcntl.h>
#include <netdb.h>

#ifndef __BEOS__
#include <errno.h>
#endif

#ifndef __DARWIN__
#include <sys/time.h>
#endif

#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/socket.h>
#include <arpa/inet.h>

#include <gpac/network.h>

#define INVALID_SOCKET -1
#define SOCKET_ERROR -1
#define LASTSOCKERROR errno

typedef s32 SOCKET;
#define closesocket(v) close(v)

#endif

#ifdef __SYMBIAN32__
#define SSO_CAST
#else
#define SSO_CAST (const char *)
#endif


#define SOCK_MICROSEC_WAIT      500

#ifdef GPAC_HAS_IPV6
static u32 ipv6_check_state = 0;
#endif

/*internal flags*/
enum
{
        GF_SOCK_IS_TCP = 1<<9,
        GF_SOCK_IS_IPV6 = 1<<10,
        GF_SOCK_NON_BLOCKING = 1<<11,
        GF_SOCK_IS_MULTICAST = 1<<12,
        GF_SOCK_IS_LISTENING = 1<<13,
        GF_SOCK_HAS_SOURCE = 1<<14
};

struct __tag_socket
{
        u32 flags;
        SOCKET socket;
        /*destination address for sendto/recvfrom*/
#ifdef GPAC_HAS_IPV6
        struct sockaddr_storage dest_addr;
#else
        struct sockaddr_in dest_addr;
#endif
        u32 dest_addr_len;
};

/*
                Some NTP tools
*/

void gf_net_get_ntp(u32 *sec, u32 *frac)
{
        struct timeval now;
#ifdef WIN32
        s32 gettimeofday(struct timeval *tp, void *tz);
#endif
        gettimeofday(&now, NULL);
        *sec = (u32) (now.tv_sec) + GF_NTP_SEC_1900_TO_1970;
        *frac = (u32) ( (now.tv_usec << 12) + (now.tv_usec << 8) - ((now.tv_usec * 3650) >> 6) );
}

u32 gf_net_has_ipv6()
{
#ifdef GPAC_HAS_IPV6
        if (!ipv6_check_state) {
                SOCKET s;
#ifdef WIN32
                if (!wsa_init) {
                        WSADATA Data;
                        if (WSAStartup(0x0202, &Data)!=0) {
                                ipv6_check_state = 1;
                                return 0;
                        }
                }
#endif
                s = socket(PF_INET6, SOCK_STREAM, 0);
                if (!s) ipv6_check_state = 1;
                else {
                        ipv6_check_state = 2;
                        closesocket(s);
                }
#ifdef WIN32
                if (!wsa_init) WSACleanup();
#endif
        }
        return (ipv6_check_state==2);
#else
        return 0;
#endif
}

#ifdef GPAC_HAS_IPV6
static struct addrinfo *gf_sk_get_ipv6_addr(char *PeerName, u16 PortNumber, int family, int flags, int sock_type)
{
        struct  addrinfo *res=NULL;
        struct  addrinfo hints;
        char node[50], portstring[20], *service, *dest;

        service = dest = NULL;
        memset(&hints, 0, sizeof(hints));
        hints.ai_socktype = sock_type;
        hints.ai_family = family;
        hints.ai_flags = flags;

        if (PortNumber) {
                sprintf (portstring, "%d", PortNumber);
                service = (char *)portstring;
        }
        if (PeerName) {
                strcpy(node, PeerName);
                if (node[0]=='[') {
                        node[strlen(node)-1] = 0;
                        strcpy(node, &node[1]);
                }
                dest = (char *) node;
        }
        if (getaddrinfo((const char *)dest, (const char *)service, &hints, &res) != 0) return NULL;
        return res;
}

static Bool gf_sk_ipv6_set_remote_address(GF_Socket *sock, char *address, u16 PortNumber)
{
        struct addrinfo *res = gf_sk_get_ipv6_addr(address, PortNumber, AF_UNSPEC, 0, (sock->flags & GF_SOCK_IS_TCP) ? SOCK_STREAM : SOCK_DGRAM);
        if (!res) return 0;
        memcpy(&sock->dest_addr, res->ai_addr, res->ai_addrlen);
        sock->dest_addr_len = res->ai_addrlen;
        freeaddrinfo(res);
        return 1;
}
#endif


GF_Err gf_sk_get_host_name(char *buffer)
{
        s32 ret = gethostname(buffer, GF_MAX_IP_NAME_LEN);
        return (ret == SOCKET_ERROR) ? GF_IP_ADDRESS_NOT_FOUND : GF_OK;
}

GF_Err gf_sk_get_local_ip(GF_Socket *sock, char *buffer)
{
#ifdef GPAC_HAS_IPV6
        char clienthost[NI_MAXHOST];
        struct sockaddr_storage clientaddr;
        socklen_t addrlen = sizeof(clientaddr);
        if (getsockname(sock->socket, (struct sockaddr *)&clientaddr, &addrlen)) return GF_IP_NETWORK_FAILURE;

        if (getnameinfo((struct sockaddr *)&clientaddr, addrlen, clienthost, sizeof(clienthost), NULL, 0, NI_NUMERICHOST))
                return GF_IP_NETWORK_FAILURE;
        strcpy(buffer, clienthost);
#else
        char *ip;
        struct sockaddr_in name;
        u32 len = sizeof(struct sockaddr_in);
        if (getsockname(sock->socket, (struct sockaddr*) &name, &len)) return GF_IP_NETWORK_FAILURE;
        ip = inet_ntoa(name.sin_addr);
        if (!ip) return GF_IP_NETWORK_FAILURE;
        strcpy(buffer, ip);
#endif
        return GF_OK;
}

GF_Socket *gf_sk_new(u32 SocketType)
{
        GF_Socket *tmp;

        /*init WinSock*/
#ifdef WIN32
        WSADATA Data;
        if (!wsa_init && (WSAStartup(0x0202, &Data)!=0) ) return NULL;
#endif
        if ((SocketType != GF_SOCK_TYPE_UDP) && (SocketType != GF_SOCK_TYPE_TCP)) return NULL;

        GF_SAFEALLOC(tmp, GF_Socket);
        if (!tmp) return NULL;
        if (SocketType == GF_SOCK_TYPE_TCP) tmp->flags |= GF_SOCK_IS_TCP;

#ifdef GPAC_HAS_IPV6
        memset(&tmp->dest_addr, 0, sizeof(struct sockaddr_storage));
#else
        memset(&tmp->dest_addr, 0, sizeof(struct sockaddr_in));
        tmp->dest_addr_len = sizeof(struct sockaddr);
#endif

#ifdef WIN32
        wsa_init ++;
#endif
        return tmp;
}

GF_Err gf_sk_set_buffer_size(GF_Socket *sock, Bool SendBuffer, u32 NewSize)
{
        if (!sock || !sock->socket) return GF_BAD_PARAM;

        if (SendBuffer) {
                setsockopt(sock->socket, SOL_SOCKET, SO_SNDBUF, (char *) &NewSize, sizeof(u32) );
        } else {
                setsockopt(sock->socket, SOL_SOCKET, SO_RCVBUF, (char *) &NewSize, sizeof(u32) );
        }
        return GF_OK;
}

GF_Err gf_sk_set_block_mode(GF_Socket *sock, u32 NonBlockingOn)
{
#ifdef WIN32
        s32 res;
        u_long val = NonBlockingOn;
        res = ioctlsocket(sock->socket, FIONBIO, &val);
        if (res) return GF_SERVICE_ERROR;
#else
//      s32 flag = fcntl(sock->socket, F_GETFL, 0);
//      res = fcntl(sock->socket, F_SETFL, flag | O_NONBLOCK);
//      if (res) return GF_SERVICE_ERROR;
#endif
        if (NonBlockingOn) {
                sock->flags |= GF_SOCK_NON_BLOCKING;
        } else {
                sock->flags &= ~GF_SOCK_NON_BLOCKING;
        }
        return GF_OK;
}


static void gf_sk_gf_free(GF_Socket *sock)
{
        /*leave multicast*/
        if (sock->socket && (sock->flags & GF_SOCK_IS_MULTICAST) ) {
                struct ip_mreq mreq;
#ifdef GPAC_HAS_IPV6
                struct sockaddr *addr = (struct sockaddr *)&sock->dest_addr;
                if (addr->sa_family==AF_INET6) {
                        struct ipv6_mreq mreq6;
                        memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
                        mreq6.ipv6mr_interface= 0;
                        setsockopt(sock->socket, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, (char *) &mreq6, sizeof(mreq6));
                } else {
                        mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
                        mreq.imr_interface.s_addr = INADDR_ANY;
                        setsockopt(sock->socket, IPPROTO_IP, IP_DROP_MEMBERSHIP, (char *) &mreq, sizeof(mreq));
                }
#else
                mreq.imr_multiaddr.s_addr = sock->dest_addr.sin_addr.s_addr;
                mreq.imr_interface.s_addr = INADDR_ANY;
                setsockopt(sock->socket, IPPROTO_IP, IP_DROP_MEMBERSHIP, (char *) &mreq, sizeof(mreq));
#endif
        }
        if (sock->socket) closesocket(sock->socket);
        sock->socket = (SOCKET) 0L;
}

void gf_sk_del(GF_Socket *sock)
{
        gf_sk_gf_free(sock);
#ifdef WIN32
        wsa_init --;
        if (!wsa_init) WSACleanup();
#endif
        gf_free(sock);
}

void gf_sk_reset(GF_Socket *sock)
{
        u32 clear;
        if (sock) setsockopt(sock->socket, SOL_SOCKET, SO_ERROR, (char *) &clear, sizeof(u32) );
}

s32 gf_sk_get_handle(GF_Socket *sock)
{
        return sock->socket;
}



//connects a socket to a remote peer on a given port
GF_Err gf_sk_connect(GF_Socket *sock, char *PeerName, u16 PortNumber, char *local_ip)
{
        s32 ret;
#ifdef GPAC_HAS_IPV6
        u32 type = (sock->flags & GF_SOCK_IS_TCP) ? SOCK_STREAM : SOCK_DGRAM;
        struct addrinfo *res, *aip;

        gf_sk_gf_free(sock);

        res = gf_sk_get_ipv6_addr(PeerName, PortNumber, AF_UNSPEC, AI_PASSIVE, type);
        if (!res) return GF_IP_CONNECTION_FAILURE;

        /*for all interfaces*/
        for (aip=res; aip!=NULL; aip=aip->ai_next) {
                if (type != (u32) aip->ai_socktype) continue;
                sock->socket = socket(aip->ai_family, aip->ai_socktype, aip->ai_protocol);
                if (sock->socket == INVALID_SOCKET) {
                        sock->socket = (SOCKET)NULL;
                        continue;
                }
                if (sock->flags & GF_SOCK_NON_BLOCKING) gf_sk_set_block_mode(sock, 1);
                if (aip->ai_family==PF_INET6) sock->flags |= GF_SOCK_IS_IPV6;
                else sock->flags &= ~GF_SOCK_IS_IPV6;

                ret = connect(sock->socket, aip->ai_addr, aip->ai_addrlen);
                if (ret == SOCKET_ERROR) {
                        closesocket(sock->socket);
                        sock->socket = (SOCKET)NULL;
                        continue;
                }

                memcpy(&sock->dest_addr, aip->ai_addr, aip->ai_addrlen);
                sock->dest_addr_len = aip->ai_addrlen;
                freeaddrinfo(res);
                return GF_OK;
        }
        freeaddrinfo(res);
        return GF_IP_CONNECTION_FAILURE;

#else
        struct hostent *Host;

        if (!sock->socket)
                sock->socket = socket(AF_INET, (sock->flags & GF_SOCK_IS_TCP) ? SOCK_STREAM : SOCK_DGRAM, 0);

        /*setup the address*/
        sock->dest_addr.sin_family = AF_INET;
        sock->dest_addr.sin_port = htons(PortNumber);
        /*get the server IP*/
        sock->dest_addr.sin_addr.s_addr = inet_addr(PeerName);
        if (sock->dest_addr.sin_addr.s_addr==INADDR_NONE) {
                Host = gethostbyname(PeerName);
                if (Host == NULL) {
                        switch (LASTSOCKERROR) {
#ifndef __SYMBIAN32__
                        case ENETDOWN:
                                return GF_IP_NETWORK_FAILURE;
                                //case ENOHOST: return GF_IP_ADDRESS_NOT_FOUND;
#endif
                        default:
                                return GF_IP_NETWORK_FAILURE;
                        }
                }
                memcpy((char *) &sock->dest_addr.sin_addr, Host->h_addr_list[0], sizeof(u32));
        }

        if (sock->flags & GF_SOCK_IS_TCP) {
                ret = connect(sock->socket, (struct sockaddr *) &sock->dest_addr, sizeof(struct sockaddr));
                if (ret == SOCKET_ERROR) {
                        switch (LASTSOCKERROR) {
                        case EAGAIN:
                                return GF_IP_SOCK_WOULD_BLOCK;
                        case EISCONN:
                                return GF_OK;
                        default:
                                return GF_IP_CONNECTION_FAILURE;
                        }
                }
        }
#endif
        return GF_OK;
}


//binds the given socket to the specified port. If ReUse is true
//this will enable reuse of ports on a single machine
GF_Err gf_sk_bind(GF_Socket *sock, char *local_ip, u16 port, char *peer_name, u16 peer_port, u32 options)
{
#ifdef GPAC_HAS_IPV6
        struct addrinfo *res, *aip;
        int af;
        u32 type;
#else
        size_t addrlen;
        struct sockaddr_in LocalAdd;
        struct hostent *Host;
        char buf[GF_MAX_IP_NAME_LEN];
#endif
        s32 ret;
        s32 optval;

        if (!sock || sock->socket) return GF_BAD_PARAM;

#ifdef GPAC_HAS_IPV6
        type = (sock->flags & GF_SOCK_IS_TCP) ? SOCK_STREAM : SOCK_DGRAM;
        af = (options & GF_SOCK_FORCE_IPV6) ? PF_INET6 : PF_UNSPEC;
        if (!gf_net_has_ipv6()) af = PF_INET;
        /*probe way to peer: is it V4 or V6? */
        if (peer_name && peer_port) {
                res = gf_sk_get_ipv6_addr(peer_name, peer_port, af, AI_PASSIVE, type);
                if (!res) return GF_IP_CONNECTION_FAILURE;
#ifdef WIN32
                /*win32 has troubles redirecting IPV4 datagrams to IPV6 sockets, so override
                local family type to avoid IPV4(S)->IPV6(C) UDP*/
                af = res->ai_family;
#endif
                memcpy(&sock->dest_addr, res->ai_addr, res->ai_addrlen);
                sock->dest_addr_len = res->ai_addrlen;
                freeaddrinfo(res);
        }

        res = gf_sk_get_ipv6_addr(NULL, port, af, AI_PASSIVE, type);
        if (!res) return GF_IP_CONNECTION_FAILURE;

        /*for all interfaces*/
        for (aip=res; aip!=NULL; aip=aip->ai_next) {
                if (type != (u32) aip->ai_socktype) continue;

#ifdef WIN32
                /*recurrent pb with win32: this is not a true dual-stack, listening with a v6 socket for v4 source is
                most of the time failing. On win32, only move for connection-less V6 sockets if no other way available*/
                if (aip->ai_next && (aip->ai_next->ai_family==PF_INET)) continue;
#endif

                sock->socket = socket(aip->ai_family, aip->ai_socktype, aip->ai_protocol);
                if (sock->socket == INVALID_SOCKET) {
                        sock->socket = (SOCKET)NULL;
                        continue;
                }
                if (options & GF_SOCK_REUSE_PORT) {
                        optval = 1;
                        setsockopt(sock->socket, SOL_SOCKET, SO_REUSEADDR, (const char *) &optval, sizeof(optval));
                }
                if (sock->flags & GF_SOCK_NON_BLOCKING) gf_sk_set_block_mode(sock, 1);

                ret = bind(sock->socket, aip->ai_addr, aip->ai_addrlen);
                if (ret == SOCKET_ERROR) {
                        closesocket(sock->socket);
                        sock->socket = (SOCKET)NULL;
                        continue;
                }

                if (aip->ai_family==PF_INET6) sock->flags |= GF_SOCK_IS_IPV6;
                else sock->flags &= ~GF_SOCK_IS_IPV6;

                if (peer_name && peer_port)
                        sock->flags |= GF_SOCK_HAS_SOURCE;

                freeaddrinfo(res);
                return GF_OK;
        }
        freeaddrinfo(res);
        return GF_IP_CONNECTION_FAILURE;

#else

        if (!sock->socket) {
                sock->socket = socket(AF_INET, (sock->flags & GF_SOCK_IS_TCP) ? SOCK_STREAM : SOCK_DGRAM, 0);
                if (sock->flags & GF_SOCK_NON_BLOCKING) gf_sk_set_block_mode(sock, 1);
                sock->flags &= ~GF_SOCK_IS_IPV6;
        }

        memset((void *) &LocalAdd, 0, sizeof(LocalAdd));
        ret = gethostname(buf, GF_MAX_IP_NAME_LEN);
        if (ret == SOCKET_ERROR) return GF_IP_ADDRESS_NOT_FOUND;
        /*get the IP address*/
        Host = gethostbyname(buf);
        if (Host == NULL) return GF_IP_ADDRESS_NOT_FOUND;
        /*setup the address*/
        memcpy((char *) &LocalAdd.sin_addr, Host->h_addr_list[0], sizeof(LocalAdd.sin_addr));
        LocalAdd.sin_family = AF_INET;
        LocalAdd.sin_addr.s_addr = INADDR_ANY;
        LocalAdd.sin_port = htons(port);
        addrlen = sizeof(struct sockaddr_in);
        if (options & GF_SOCK_REUSE_PORT) {
                optval = 1;
                setsockopt(sock->socket, SOL_SOCKET, SO_REUSEADDR, SSO_CAST &optval, sizeof(optval));
        }
        /*bind the socket*/
        ret = bind(sock->socket, (struct sockaddr *) &LocalAdd, addrlen);
        if (ret == SOCKET_ERROR) return GF_IP_CONNECTION_FAILURE;

        if (peer_name && peer_port) {
                sock->dest_addr.sin_port = htons(peer_port);
                sock->dest_addr.sin_family = AF_INET;
                sock->dest_addr.sin_addr.s_addr = inet_addr(peer_name);
                if (sock->dest_addr.sin_addr.s_addr == INADDR_NONE) {
                        Host = gethostbyname(peer_name);
                        if (Host == NULL) return GF_IP_ADDRESS_NOT_FOUND;
                        memcpy((char *) &sock->dest_addr.sin_addr, Host->h_addr_list[0], sizeof(u32));
                }
                sock->flags |= GF_SOCK_HAS_SOURCE;
        }
#endif
        return GF_OK;
}

//send length bytes of a buffer
GF_Err gf_sk_send(GF_Socket *sock, char *buffer, u32 length)
{
        GF_Err e;
        u32 Count;
        s32 Res;
#ifndef __SYMBIAN32__
        u32 ready;
        struct timeval timeout;
        fd_set Group;
#endif

        e = GF_OK;

        //the socket must be bound or connected
        if (!sock || !sock->socket) return GF_BAD_PARAM;

#ifndef __SYMBIAN32__
        //can we write?
        FD_ZERO(&Group);
        FD_SET(sock->socket, &Group);
        timeout.tv_sec = 0;
        timeout.tv_usec = SOCK_MICROSEC_WAIT;

        ready = select(sock->socket+1, NULL, &Group, NULL, &timeout);
        if (ready == SOCKET_ERROR) {
                switch (LASTSOCKERROR) {
                case EAGAIN:
                        return GF_IP_SOCK_WOULD_BLOCK;
                default:
                        return GF_IP_NETWORK_FAILURE;
                }
        }
        //should never happen (to check: is writeability is guaranteed for not-connected sockets)
        if (!ready || !FD_ISSET(sock->socket, &Group)) {
                return GF_IP_NETWORK_EMPTY;
        }
#endif

        //direct writing
        Count = 0;
        while (Count < length) {
                if (sock->flags & GF_SOCK_IS_TCP) {
                        Res = send(sock->socket, (char *) &buffer[Count], length - Count, 0);
                } else {
                        Res = sendto(sock->socket, (char *) &buffer[Count], length - Count, 0, (struct sockaddr *) &sock->dest_addr, sock->dest_addr_len);
                }
                if (Res == SOCKET_ERROR) {
                        switch (LASTSOCKERROR) {
                        case EAGAIN:
                                return GF_IP_SOCK_WOULD_BLOCK;
#ifndef __SYMBIAN32__
                        case ENOTCONN:
                        case ECONNRESET:
                                return GF_IP_CONNECTION_CLOSED;
#endif
                        default:
                                return GF_IP_NETWORK_FAILURE;
                        }
                }
                Count += Res;
        }
        return GF_OK;
}


GF_EXPORT
u32 gf_sk_is_multicast_address(char *multi_IPAdd)
{
#ifdef GPAC_HAS_IPV6
        u32 val;
        struct addrinfo *res;
        if (!multi_IPAdd) return 0;
        res = gf_sk_get_ipv6_addr(multi_IPAdd, 0, AF_UNSPEC, AI_PASSIVE, SOCK_STREAM);
        if (!res) return 0;
        val = 0;
        if (res->ai_addr->sa_family == AF_INET) {
                val = IN_MULTICAST(ntohl(((struct sockaddr_in *)res->ai_addr)->sin_addr.s_addr));
        } else if (res->ai_addr->sa_family == AF_INET6) {
                val = IN6_IS_ADDR_MULTICAST(& ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr);
        }
        freeaddrinfo(res);
        return val;
#else
        if (!multi_IPAdd) return 0;
        return ((htonl(inet_addr(multi_IPAdd)) >> 8) & 0x00f00000) == 0x00e00000;
#endif
}

GF_Err gf_sk_setup_multicast(GF_Socket *sock, char *multi_IPAdd, u16 MultiPortNumber, u32 TTL, Bool NoBind, char *local_interface_ip)
{
        s32 ret;
        u32 flag;
        struct ip_mreq M_req;
        u32 optval;
#ifdef GPAC_HAS_IPV6
        struct sockaddr *addr;
        struct addrinfo *res, *aip;
        u32 type;
#else
        u_long local_add_id;
#endif

        if (!sock || sock->socket) return GF_BAD_PARAM;

        if (TTL > 255) TTL = 255;

        /*check the address*/
        if (!gf_sk_is_multicast_address(multi_IPAdd)) return GF_BAD_PARAM;

#ifdef GPAC_HAS_IPV6
        type = (sock->flags & GF_SOCK_IS_TCP) ? SOCK_STREAM : SOCK_DGRAM;
        res = gf_sk_get_ipv6_addr(local_interface_ip, MultiPortNumber, AF_UNSPEC, AI_PASSIVE, type);
        if (!res) {
                if (local_interface_ip) {
                        res = gf_sk_get_ipv6_addr(NULL, MultiPortNumber, AF_UNSPEC, AI_PASSIVE, type);
                        local_interface_ip = NULL;
                }
                if (!res) return GF_IP_CONNECTION_FAILURE;
        }

        /*for all interfaces*/
        for (aip=res; aip!=NULL; aip=aip->ai_next) {
                if (type != (u32) aip->ai_socktype) continue;
                sock->socket = socket(aip->ai_family, aip->ai_socktype, aip->ai_protocol);
                if (sock->socket == INVALID_SOCKET) {
                        sock->socket = (SOCKET)NULL;
                        continue;
                }
                /*enable address reuse*/
                optval = SO_REUSEADDR;
                setsockopt(sock->socket, SOL_SOCKET, SO_REUSEADDR, (const char *) &optval, sizeof(optval));

                /*TODO: copy over other properties (recption buffer size & co)*/
                if (sock->flags & GF_SOCK_NON_BLOCKING) gf_sk_set_block_mode(sock, 1);

                memcpy(&sock->dest_addr, aip->ai_addr, aip->ai_addrlen);
                sock->dest_addr_len = aip->ai_addrlen;

                if (!NoBind) {
                        ret = bind(sock->socket, aip->ai_addr, aip->ai_addrlen);
                        if (ret == SOCKET_ERROR) {
                                closesocket(sock->socket);
                                sock->socket = (SOCKET)NULL;
                                continue;
                        }
                }
                if (aip->ai_family==PF_INET6) sock->flags |= GF_SOCK_IS_IPV6;
                else sock->flags &= ~GF_SOCK_IS_IPV6;
                break;
        }
        freeaddrinfo(res);
        if (!sock->socket) return GF_IP_CONNECTION_FAILURE;

        if (!gf_sk_ipv6_set_remote_address(sock, multi_IPAdd, MultiPortNumber))
                return GF_IP_CONNECTION_FAILURE;

        addr = (struct sockaddr *)&sock->dest_addr;
        if (addr->sa_family == AF_INET) {
                M_req.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
                M_req.imr_interface.s_addr = INADDR_ANY;
                ret = setsockopt(sock->socket, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *) &M_req, sizeof(M_req));
                if (ret == SOCKET_ERROR) return GF_IP_CONNECTION_FAILURE;
                /*set TTL*/
                ret = setsockopt(sock->socket, IPPROTO_IP, IP_MULTICAST_TTL, (char *) &TTL, sizeof(TTL));
                if (ret == SOCKET_ERROR) return GF_IP_CONNECTION_FAILURE;
                /*Disable loopback*/
                flag = 1;
                ret = setsockopt(sock->socket, IPPROTO_IP, IP_MULTICAST_LOOP, (char *) &flag, sizeof(flag));
                if (ret == SOCKET_ERROR) return GF_IP_CONNECTION_FAILURE;
        }
        if (addr->sa_family == AF_INET6) {
                struct ipv6_mreq M_reqV6;
                memcpy(&M_reqV6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
                M_reqV6.ipv6mr_interface = 0;
                ret = setsockopt(sock->socket, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, (char *) &M_reqV6, sizeof(M_reqV6));
                if (ret == SOCKET_ERROR) return GF_IP_CONNECTION_FAILURE;
                /*set TTL*/
                ret = setsockopt(sock->socket, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, (char *) &TTL, sizeof(TTL));
                if (ret == SOCKET_ERROR) return GF_IP_CONNECTION_FAILURE;
                /*Disable loopback*/
                flag = 1;
                ret = setsockopt(sock->socket, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, (char *) &flag, sizeof(flag));
                if (ret == SOCKET_ERROR) return GF_IP_CONNECTION_FAILURE;
        }
#else

        /*enable address reuse*/
        optval = SO_REUSEADDR;
        setsockopt(sock->socket, SOL_SOCKET, SO_REUSEADDR, SSO_CAST &optval, sizeof(optval));

        if (local_interface_ip) local_add_id = inet_addr(local_interface_ip);
        else local_add_id = htonl(INADDR_ANY);

        if (!NoBind) {
                struct sockaddr_in local_address;

                local_address.sin_family = AF_INET;
                local_address.sin_addr.s_addr = local_add_id;
                local_address.sin_port = htons( MultiPortNumber);

                ret = bind(sock->socket, (struct sockaddr *) &local_address, sizeof(local_address));
                if (ret == SOCKET_ERROR) {
                        /*retry without specifying the local add*/
                        local_address.sin_addr.s_addr = local_add_id = htonl(INADDR_ANY);
                        local_interface_ip = NULL;
                        ret = bind(sock->socket, (struct sockaddr *) &local_address, sizeof(local_address));
                        if (ret == SOCKET_ERROR) return GF_IP_CONNECTION_FAILURE;
                }
                /*setup local interface*/
                if (local_interface_ip) {
                        ret = setsockopt(sock->socket, IPPROTO_IP, IP_MULTICAST_IF, (char *) &local_add_id, sizeof(local_add_id));
                        if (ret == SOCKET_ERROR) return GF_IP_CONNECTION_FAILURE;
                }
        }
        /*now join the multicast*/
        M_req.imr_multiaddr.s_addr = inet_addr(multi_IPAdd);
        M_req.imr_interface.s_addr = local_add_id;

        ret = setsockopt(sock->socket, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *) &M_req, sizeof(M_req));
        if (ret == SOCKET_ERROR) return GF_IP_CONNECTION_FAILURE;
        /*set the Time To Live*/
        ret = setsockopt(sock->socket, IPPROTO_IP, IP_MULTICAST_TTL, (char *)&TTL, sizeof(TTL));
        if (ret == SOCKET_ERROR) return GF_IP_CONNECTION_FAILURE;
        /*Disable loopback*/
        flag = 1;
        ret = setsockopt(sock->socket, IPPROTO_IP, IP_MULTICAST_LOOP, (char *) &flag, sizeof(flag));
        if (ret == SOCKET_ERROR) return GF_IP_CONNECTION_FAILURE;

        sock->dest_addr.sin_family = AF_INET;
        sock->dest_addr.sin_addr.s_addr = M_req.imr_multiaddr.s_addr;
        sock->dest_addr.sin_port = htons( MultiPortNumber);
#endif
        sock->flags |= GF_SOCK_IS_MULTICAST;
        return GF_OK;
}




//fetch nb bytes on a socket and fill the buffer from startFrom
//length is the allocated size of the receiving buffer
//BytesRead is the number of bytes read from the network
GF_Err gf_sk_receive(GF_Socket *sock, char *buffer, u32 length, u32 startFrom, u32 *BytesRead)
{
        GF_Err e;
        s32 res;
#ifndef __SYMBIAN32__
        u32 ready;
        struct timeval timeout;
        fd_set Group;
#endif

        e = GF_OK;

        *BytesRead = 0;
        if (!sock->socket) return GF_BAD_PARAM;
        if (startFrom >= length) return GF_IO_ERR;

#ifndef __SYMBIAN32__
        //can we read?
        FD_ZERO(&Group);
        FD_SET(sock->socket, &Group);
        timeout.tv_sec = 0;
        timeout.tv_usec = SOCK_MICROSEC_WAIT;

        res = 0;
        ready = select(sock->socket+1, &Group, NULL, NULL, &timeout);
        if (ready == SOCKET_ERROR) {
                switch (LASTSOCKERROR) {
                case EAGAIN:
                        return GF_IP_SOCK_WOULD_BLOCK;
                default:
                        GF_LOG(GF_LOG_ERROR, GF_LOG_CORE, ("[socket] cannot select (error %d)\n", LASTSOCKERROR));
                        return GF_IP_NETWORK_FAILURE;
                }
        }
        if (!FD_ISSET(sock->socket, &Group)) {
                return GF_IP_NETWORK_EMPTY;
        }
#endif

        if (sock->flags & GF_SOCK_HAS_SOURCE)
                res = recvfrom(sock->socket, (char *) buffer + startFrom, length - startFrom, 0, (struct sockaddr *)&sock->dest_addr, &sock->dest_addr_len);
        else
                res = recv(sock->socket, (char *) buffer + startFrom, length - startFrom, 0);

        if (res == SOCKET_ERROR) {
                res = LASTSOCKERROR;
                switch (res) {
                case EAGAIN:
                        return GF_IP_SOCK_WOULD_BLOCK;
#ifndef __SYMBIAN32__
                case EMSGSIZE:
                        return GF_OUT_OF_MEM;
                case ENOTCONN:
                case ECONNRESET:
                case ECONNABORTED:
                        return GF_IP_CONNECTION_CLOSED;
#endif
                default:
                        GF_LOG(GF_LOG_ERROR, GF_LOG_CORE, ("[socket] cannot read from network (%d)\n", LASTSOCKERROR));
                        return GF_IP_NETWORK_FAILURE;
                }
        }
        *BytesRead = res;
        return GF_OK;
}


GF_Err gf_sk_listen(GF_Socket *sock, u32 MaxConnection)
{
        s32 i;
        if (!sock || !sock->socket) return GF_BAD_PARAM;
        if (MaxConnection >= SOMAXCONN) MaxConnection = SOMAXCONN;
        i = listen(sock->socket, MaxConnection);
        if (i == SOCKET_ERROR) return GF_IP_NETWORK_FAILURE;
        sock->flags |= GF_SOCK_IS_LISTENING;
        return GF_OK;
}

GF_Err gf_sk_accept(GF_Socket *sock, GF_Socket **newConnection)
{
        u32 client_address_size;
        SOCKET sk;
#ifndef __SYMBIAN32__
        u32 ready;
        struct timeval timeout;
        fd_set Group;
#endif
#ifndef __SYMBIAN32__
        u32 res;
#endif
        *newConnection = NULL;
        if (!sock || !(sock->flags & GF_SOCK_IS_LISTENING) ) return GF_BAD_PARAM;

#ifndef __SYMBIAN32__
        //can we read?
        FD_ZERO(&Group);
        FD_SET(sock->socket, &Group);
        timeout.tv_sec = 0;
        timeout.tv_usec = SOCK_MICROSEC_WAIT;

        res = 0;
        ready = select(sock->socket, &Group, NULL, NULL, &timeout);
        if (ready == SOCKET_ERROR) {
                switch (LASTSOCKERROR) {
                case EAGAIN:
                        return GF_IP_SOCK_WOULD_BLOCK;
                default:
                        return GF_IP_NETWORK_FAILURE;
                }
        }
        if (!ready || !FD_ISSET(sock->socket, &Group)) return GF_IP_NETWORK_EMPTY;
#endif

#ifdef GPAC_HAS_IPV6
        client_address_size = sizeof(struct sockaddr_in6);
#else
        client_address_size = sizeof(struct sockaddr_in);
#endif
        sk = accept(sock->socket, (struct sockaddr *) &sock->dest_addr, &client_address_size);

        //we either have an error or we have no connections
        if (sk == INVALID_SOCKET) {
//              if (sock->flags & GF_SOCK_NON_BLOCKING) return GF_IP_NETWORK_FAILURE;
                switch (LASTSOCKERROR) {
                case EAGAIN:
                        return GF_IP_SOCK_WOULD_BLOCK;
                default:
                        return GF_IP_NETWORK_FAILURE;
                }
        }

        (*newConnection) = (GF_Socket *) gf_malloc(sizeof(GF_Socket));
        (*newConnection)->socket = sk;
        (*newConnection)->flags = sock->flags & ~GF_SOCK_IS_LISTENING;
#ifdef GPAC_HAS_IPV6
        memcpy( &(*newConnection)->dest_addr, &sock->dest_addr, client_address_size);
        memset(&sock->dest_addr, 0, sizeof(struct sockaddr_in6));
#else
        memcpy( &(*newConnection)->dest_addr, &sock->dest_addr, client_address_size);
        memset(&sock->dest_addr, 0, sizeof(struct sockaddr_in));
#endif
        (*newConnection)->dest_addr_len = client_address_size;
        return GF_OK;
}

GF_Err gf_sk_get_local_info(GF_Socket *sock, u16 *Port, u32 *Familly)
{
#ifdef GPAC_HAS_IPV6
        struct sockaddr_in6 the_add;
#else
        struct sockaddr_in the_add;
#endif
        u32 size;

        if (!sock || !sock->socket) return GF_BAD_PARAM;

        if (Port) {
#ifdef GPAC_HAS_IPV6
                size = sizeof(struct sockaddr_in6);
                if (getsockname(sock->socket, (struct sockaddr *) &the_add, &size) == SOCKET_ERROR) return GF_IP_NETWORK_FAILURE;
                *Port = (u32) ntohs(the_add.sin6_port);
#else
                size = sizeof(struct sockaddr_in);
                if (getsockname(sock->socket, (struct sockaddr *) &the_add, &size) == SOCKET_ERROR) return GF_IP_NETWORK_FAILURE;
                *Port = (u32) ntohs(the_add.sin_port);
#endif
        }
        if (Familly) {
                /*              size = 4;
                                if (getsockopt(sock->socket, SOL_SOCKET, SO_TYPE, (char *) &fam, &size) == SOCKET_ERROR)
                                        return GF_IP_NETWORK_FAILURE;
                                *Familly = fam;
                */
                if (sock->flags & GF_SOCK_IS_TCP) *Familly = GF_SOCK_TYPE_TCP;
                else  *Familly = GF_SOCK_TYPE_UDP;
        }
        return GF_OK;
}

//we have to do this for the server sockets as we use only one thread
GF_Err gf_sk_server_mode(GF_Socket *sock, Bool serverOn)
{
        u32 one;

        if (!sock || !(sock->flags & GF_SOCK_IS_TCP) || !sock->socket)
                return GF_BAD_PARAM;

        one = serverOn ? 1 : 0;
        setsockopt(sock->socket, IPPROTO_TCP, TCP_NODELAY, SSO_CAST &one, sizeof(u32));
#ifndef __SYMBIAN32__
        setsockopt(sock->socket, SOL_SOCKET, SO_KEEPALIVE, (char *) &one, sizeof(u32));
#endif
        return GF_OK;
}

GF_Err gf_sk_get_remote_address(GF_Socket *sock, char *buf)
{
#ifdef GPAC_HAS_IPV6
        char clienthost[NI_MAXHOST];
        struct sockaddr_in6 * addrptr = (struct sockaddr_in6 *)(&sock->dest_addr_len);
        if (!sock || sock->socket) return GF_BAD_PARAM;
        if (getnameinfo((struct sockaddr *)addrptr, sock->dest_addr_len, clienthost, sizeof(clienthost), NULL, 0, NI_NUMERICHOST))
                return GF_IP_ADDRESS_NOT_FOUND;
        strcpy(buf, clienthost);
#else
        if (!sock || !sock->socket) return GF_BAD_PARAM;
        strcpy(buf, inet_ntoa(sock->dest_addr.sin_addr));
#endif
        return GF_OK;
}




//send length bytes of a buffer
GF_Err gf_sk_send_to(GF_Socket *sock, char *buffer, u32 length, char *remoteHost, u16 remotePort)
{
        u32 Count, remote_add_len;
        s32 Res;
#ifdef GPAC_HAS_IPV6
        struct sockaddr_storage remote_add;
#else
        struct sockaddr_in remote_add;
        struct hostent *Host;
#endif
#ifndef __SYMBIAN32__
        u32 ready;
        struct timeval timeout;
        fd_set Group;
#endif

        //the socket must be bound or connected
        if (!sock || !sock->socket) return GF_BAD_PARAM;
        if (remoteHost && !remotePort) return GF_BAD_PARAM;

#ifndef __SYMBIAN32__
        //can we write?
        FD_ZERO(&Group);
        FD_SET(sock->socket, &Group);
        timeout.tv_sec = 0;
        timeout.tv_usec = SOCK_MICROSEC_WAIT;

        ready = select(sock->socket+1, NULL, &Group, NULL, &timeout);
        if (ready == SOCKET_ERROR) {
                switch (LASTSOCKERROR) {
                case EAGAIN:
                        return GF_IP_SOCK_WOULD_BLOCK;
                default:
                        return GF_IP_NETWORK_FAILURE;
                }
        }
        if (!ready || !FD_ISSET(sock->socket, &Group)) return GF_IP_NETWORK_EMPTY;
#endif


        /*setup the address*/
#ifdef GPAC_HAS_IPV6
        remote_add.ss_family = AF_INET6;
        //if a remote host is specified, use it. Otherwise use the default host
        if (remoteHost) {
                //setup the address
                struct addrinfo *res = gf_sk_get_ipv6_addr(remoteHost, remotePort, AF_UNSPEC, 0, (sock->flags & GF_SOCK_IS_TCP) ? SOCK_STREAM : SOCK_DGRAM);
                if (!res) return GF_IP_ADDRESS_NOT_FOUND;
                memcpy(&remote_add, res->ai_addr, res->ai_addrlen);
                remote_add_len = res->ai_addrlen;
                freeaddrinfo(res);
        } else {
                struct sockaddr_in6 *remotePtr = (struct sockaddr_in6 *)&remote_add;
                struct sockaddr_in6 * addrptr = (struct sockaddr_in6 *)(&sock->dest_addr);
                remotePtr->sin6_port = addrptr->sin6_port;
                remotePtr->sin6_addr = addrptr->sin6_addr;
                remote_add_len = sock->dest_addr_len;
        }
#else
        remote_add_len = sizeof(struct sockaddr_in);
        remote_add.sin_family = AF_INET;
        //if a remote host is specified, use it. Otherwise use the default host
        if (remoteHost) {
                //setup the address
                remote_add.sin_port = htons(remotePort);
                //get the server IP
                Host = gethostbyname(remoteHost);
                if (Host == NULL) return GF_IP_ADDRESS_NOT_FOUND;
                memcpy((char *) &remote_add.sin_addr, Host->h_addr_list[0], sizeof(u32));
        } else {
                remote_add.sin_port = sock->dest_addr.sin_port;
                remote_add.sin_addr.s_addr = sock->dest_addr.sin_addr.s_addr;
        }
#endif
        Count = 0;
        while (Count < length) {
                Res = sendto(sock->socket, (char *) &buffer[Count], length - Count, 0, (struct sockaddr *) &remote_add, remote_add_len);
                if (Res == SOCKET_ERROR) {
                        switch (LASTSOCKERROR) {
                        case EAGAIN:
                                return GF_IP_SOCK_WOULD_BLOCK;
                        default:
                                return GF_IP_NETWORK_FAILURE;
                        }
                }
                Count += Res;
        }
        return GF_OK;
}




GF_Err gf_sk_receive_wait(GF_Socket *sock, char *buffer, u32 length, u32 startFrom, u32 *BytesRead, u32 Second )
{
        GF_Err e;
        s32 res;
#ifndef __SYMBIAN32__
        u32 ready;
        struct timeval timeout;
        fd_set Group;
#endif
        e = GF_OK;

        *BytesRead = 0;
        if (startFrom >= length) return GF_OK;


#ifndef __SYMBIAN32__
        //can we read?
        FD_ZERO(&Group);
        FD_SET(sock->socket, &Group);
        timeout.tv_sec = Second;
        timeout.tv_usec = SOCK_MICROSEC_WAIT;

        res = 0;
        ready = select(sock->socket+1, &Group, NULL, NULL, &timeout);
        if (ready == SOCKET_ERROR) {
                switch (LASTSOCKERROR) {
                case EAGAIN:
                        return GF_IP_SOCK_WOULD_BLOCK;
                default:
                        return GF_IP_NETWORK_FAILURE;
                }
        }
        if (!FD_ISSET(sock->socket, &Group)) {
                return GF_IP_NETWORK_EMPTY;
        }
#endif


        res = recv(sock->socket, (char *) buffer + startFrom, length - startFrom, 0);
        if (res == SOCKET_ERROR) {
                switch (LASTSOCKERROR) {
                case EAGAIN:
                        return GF_IP_SOCK_WOULD_BLOCK;
                default:
                        return GF_IP_NETWORK_FAILURE;
                }
        }
        *BytesRead = res;
        return GF_OK;
}


//send length bytes of a buffer
GF_Err gf_sk_send_wait(GF_Socket *sock, char *buffer, u32 length, u32 Second )
{

        GF_Err e;
        u32 Count;
        s32 Res;
#ifndef __SYMBIAN32__
        u32 ready;
        struct timeval timeout;
        fd_set Group;
#endif
        e = GF_OK;

        //the socket must be bound or connected
        if (!sock || !sock->socket) return GF_BAD_PARAM;

#ifndef __SYMBIAN32__
        //can we write?
        FD_ZERO(&Group);
        FD_SET(sock->socket, &Group);
        timeout.tv_sec = Second;
        timeout.tv_usec = SOCK_MICROSEC_WAIT;

        ready = select(sock->socket+1, NULL, &Group, NULL, &timeout);
        if (ready == SOCKET_ERROR) {
                switch (LASTSOCKERROR) {
                case EAGAIN:
                        return GF_IP_SOCK_WOULD_BLOCK;
                default:
                        return GF_IP_NETWORK_FAILURE;
                }
        }
        //should never happen (to check: is writeability is guaranteed for not-connected sockets)
        if (!ready || !FD_ISSET(sock->socket, &Group)) {
                return GF_IP_NETWORK_EMPTY;
        }
#endif

        //direct writing
        Count = 0;
        while (Count < length) {
                Res = send(sock->socket, (char *) &buffer[Count], length - Count, 0);
                if (Res == SOCKET_ERROR) {
                        switch (LASTSOCKERROR) {
                        case EAGAIN:
                                return GF_IP_SOCK_WOULD_BLOCK;
#ifndef __SYMBIAN32__
                        case ECONNRESET:
                                return GF_IP_CONNECTION_CLOSED;
#endif
                        default:
                                return GF_IP_NETWORK_FAILURE;
                        }
                }
                Count += Res;
        }
        return GF_OK;
}


#if 0

//Socket Group for select(). The group is a collection of sockets ready for reading / writing
typedef struct __tag_sock_group
{
        //the max time value before a select returns
        struct timeval timeout;
        fd_set ReadGroup;
        fd_set WriteGroup;
} GF_SocketGroup;


#define GF_SOCK_GROUP_READ 0
#define GF_SOCK_GROUP_WRITE 1

GF_SocketGroup *NewSockGroup()
{
        GF_SocketGroup *tmp = (GF_SocketGroup*)gf_malloc(sizeof(GF_SocketGroup));
        if (!tmp) return NULL;
        FD_ZERO(&tmp->ReadGroup);
        FD_ZERO(&tmp->WriteGroup);
        return tmp;
}

void SKG_Delete(GF_SocketGroup *group)
{
        gf_free(group);
}

void SKG_SetWatchTime(GF_SocketGroup *group, u32 DelayInS, u32 DelayInMicroS)
{
        group->timeout.tv_sec = DelayInS;
        group->timeout.tv_usec = DelayInMicroS;
}

void SKG_AddSocket(GF_SocketGroup *group, GF_Socket *sock, u32 GroupType)
{

        switch (GroupType) {
        case GF_SOCK_GROUP_READ:
                FD_SET(sock->socket, &group->ReadGroup);
                return;
        case GF_SOCK_GROUP_WRITE:
                FD_SET(sock->socket, &group->WriteGroup);
                return;
        default:
                return;
        }
}

void SKG_RemoveSocket(GF_SocketGroup *group, GF_Socket *sock, u32 GroupType)
{
        switch (GroupType) {
        case GF_SOCK_GROUP_READ:
                FD_CLR(sock->socket, &group->ReadGroup);
                return;
        case GF_SOCK_GROUP_WRITE:
                FD_CLR(sock->socket, &group->WriteGroup);
                return;
        default:
                return;
        }
}


Bool SKG_IsSocketIN(GF_SocketGroup *group, GF_Socket *sock, u32 GroupType)
{

        switch (GroupType) {
        case GF_SOCK_GROUP_READ:
                if (FD_ISSET(sock->socket, &group->ReadGroup)) return 1;
                return 0;
        case GF_SOCK_GROUP_WRITE:
                if (FD_ISSET(sock->socket, &group->WriteGroup)) return 1;
                return 0;
        default:
                return 0;
        }
}

u32 SKG_Select(GF_SocketGroup *group)
{
        u32 ready, rien = 0;
        ready = select(rien, &group->ReadGroup, &group->WriteGroup, NULL, &group->timeout);
        if (ready == SOCKET_ERROR) return 0;
        return ready;
}

#endif
/* [<][>][^][v][top][bottom][index][help] */
root/src/utils/symbian_net.cpp

DEFINITIONS
