File content as of revision 0:9cb694f00b7b:

/*****************************************************************************
*
*  socket.c  - CC3000 Host Driver Implementation.
*  Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
*
*  Redistribution and use in source and binary forms, with or without
*  modification, are permitted provided that the following conditions
*  are met:
*
*    Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*
*    Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the   
*    distribution.
*
*    Neither the name of Texas Instruments Incorporated nor the names of
*    its contributors may be used to endorse or promote products derived
*    from this software without specific prior written permission.
*
*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
*  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
*  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
*  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
*  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
*  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
*  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
*  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
*  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
*  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
*  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*****************************************************************************/

//*****************************************************************************
//
//! \addtogroup socket_api
//! @{
//
//*****************************************************************************

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "hci.h"
#include "socket.h"
#include "evnt_handler.h"
#include "netapp.h"



//Enable this flag if and only if you must comply with BSD socket 
//close() function
#ifdef _API_USE_BSD_CLOSE
   #define close(sd) closesocket(sd)
#endif

//Enable this flag if and only if you must comply with BSD socket read() and 
//write() functions
#ifdef _API_USE_BSD_READ_WRITE
              #define read(sd, buf, len, flags) recv(sd, buf, len, flags)
              #define write(sd, buf, len, flags) send(sd, buf, len, flags)
#endif

#define SOCKET_OPEN_PARAMS_LEN                (12)
#define SOCKET_CLOSE_PARAMS_LEN                (4)
#define SOCKET_ACCEPT_PARAMS_LEN            (4)
#define SOCKET_BIND_PARAMS_LEN                (20)
#define SOCKET_LISTEN_PARAMS_LEN            (8)
#define SOCKET_GET_HOST_BY_NAME_PARAMS_LEN    (9)
#define SOCKET_CONNECT_PARAMS_LEN            (20)
#define SOCKET_SELECT_PARAMS_LEN            (44)
#define SOCKET_SET_SOCK_OPT_PARAMS_LEN        (20)
#define SOCKET_GET_SOCK_OPT_PARAMS_LEN        (12)
#define SOCKET_RECV_FROM_PARAMS_LEN            (12)
#define SOCKET_SENDTO_PARAMS_LEN            (24)
#define SOCKET_MDNS_ADVERTISE_PARAMS_LEN    (12)


// The legnth of arguments for the SEND command: sd + buff_offset + len + flags, 
// while size of each parameter is 32 bit - so the total length is 16 bytes;

#define HCI_CMND_SEND_ARG_LENGTH    (16)


#define SELECT_TIMEOUT_MIN_MICRO_SECONDS  5000

#define HEADERS_SIZE_DATA       (SPI_HEADER_SIZE + 5)

#define SIMPLE_LINK_HCI_CMND_TRANSPORT_HEADER_SIZE  (SPI_HEADER_SIZE + SIMPLE_LINK_HCI_CMND_HEADER_SIZE)

#define MDNS_DEVICE_SERVICE_MAX_LENGTH     (32)


//*****************************************************************************
//
//! HostFlowControlConsumeBuff
//!
//!  @param  sd  socket descriptor
//!
//!  @return 0 in case there are buffers available, 
//!          -1 in case of bad socket
//!          -2 if there are no free buffers present (only when 
//!          SEND_NON_BLOCKING is enabled)
//!
//!  @brief  if SEND_NON_BLOCKING not define - block until have free buffer 
//!          becomes available, else return immediately  with correct status 
//!          regarding the buffers available.
//
//*****************************************************************************
int
HostFlowControlConsumeBuff(int sd)
{
#ifndef SEND_NON_BLOCKING
    /* wait in busy loop */
    do
    {
        // In case last transmission failed then we will return the last failure 
        // reason here.
        // Note that the buffer will not be allocated in this case
        if (tSLInformation.slTransmitDataError != 0)
        {
            errno = tSLInformation.slTransmitDataError;
            tSLInformation.slTransmitDataError = 0;
            return errno;
        }
        
        if(SOCKET_STATUS_ACTIVE != get_socket_active_status(sd))
            return -1;
    } while(0 == tSLInformation.usNumberOfFreeBuffers);
    
    tSLInformation.usNumberOfFreeBuffers--;
    
    return 0;
#else
    
    // In case last transmission failed then we will return the last failure 
    // reason here.
    // Note that the buffer will not be allocated in this case
    if (tSLInformation.slTransmitDataError != 0)
    {
        errno = tSLInformation.slTransmitDataError;
        tSLInformation.slTransmitDataError = 0;
        return errno;
    }
    if(SOCKET_STATUS_ACTIVE != get_socket_active_status(sd))
        return -1;
    
    //If there are no available buffers, return -2. It is recommended to use  
    // select or receive to see if there is any buffer occupied with received data
    // If so, call receive() to release the buffer.
    if(0 == tSLInformation.usNumberOfFreeBuffers)
    {
        return -2;
    }
    else
    {
        tSLInformation.usNumberOfFreeBuffers--;
        return 0;
    }
#endif
}

//*****************************************************************************
//
//! socket
//!
//!  @param  domain    selects the protocol family which will be used for 
//!                    communication. On this version only AF_INET is supported
//!  @param  type      specifies the communication semantics. On this version 
//!                    only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW are supported
//!  @param  protocol  specifies a particular protocol to be used with the 
//!                    socket IPPROTO_TCP, IPPROTO_UDP or IPPROTO_RAW are 
//!                    supported.
//!
//!  @return  On success, socket handle that is used for consequent socket 
//!           operations. On error, -1 is returned.
//!
//!  @brief  create an endpoint for communication
//!          The socket function creates a socket that is bound to a specific 
//!          transport service provider. This function is called by the 
//!          application layer to obtain a socket handle.
//
//*****************************************************************************

int
socket(long domain, long type, long protocol)
{
    long ret;
    unsigned char *ptr, *args;
    
    ret = EFAIL;
    ptr = tSLInformation.pucTxCommandBuffer;
    args = (ptr + HEADERS_SIZE_CMD);
    
    // Fill in HCI packet structure
    args = UINT32_TO_STREAM(args, domain);
    args = UINT32_TO_STREAM(args, type);
    args = UINT32_TO_STREAM(args, protocol);
    
    // Initiate a HCI command
    hci_command_send(HCI_CMND_SOCKET, ptr, SOCKET_OPEN_PARAMS_LEN);
    
    // Since we are in blocking state - wait for event complete
    SimpleLinkWaitEvent(HCI_CMND_SOCKET, &ret);
    
    // Process the event 
    errno = ret;
    
    set_socket_active_status(ret, SOCKET_STATUS_ACTIVE);
    
    return(ret);
}

//*****************************************************************************
//
//! closesocket
//!
//!  @param  sd    socket handle.
//!
//!  @return  On success, zero is returned. On error, -1 is returned.
//!
//!  @brief  The socket function closes a created socket.
//
//*****************************************************************************

long
closesocket(long sd)
{
    long ret;
    unsigned char *ptr, *args;
    
    ret = EFAIL;
    ptr = tSLInformation.pucTxCommandBuffer;
    args = (ptr + HEADERS_SIZE_CMD);
    
    // Fill in HCI packet structure
    args = UINT32_TO_STREAM(args, sd);
    
    // Initiate a HCI command
    hci_command_send(HCI_CMND_CLOSE_SOCKET,
                                     ptr, SOCKET_CLOSE_PARAMS_LEN);
    
    // Since we are in blocking state - wait for event complete
    SimpleLinkWaitEvent(HCI_CMND_CLOSE_SOCKET, &ret);
    errno = ret;
    
    // since 'close' call may result in either OK (and then it closed) or error 
    // mark this socket as invalid 
    set_socket_active_status(sd, SOCKET_STATUS_INACTIVE);
    
    return(ret);
}

//*****************************************************************************
//
//! accept
//!
//!  @param[in]   sd      socket descriptor (handle)              
//!  @param[out]  addr    the argument addr is a pointer to a sockaddr structure
//!                       This structure is filled in with the address of the  
//!                       peer socket, as known to the communications layer.        
//!                       determined. The exact format of the address returned             
//!                       addr is by the socket's address sockaddr. 
//!                       On this version only AF_INET is supported.
//!                       This argument returns in network order.
//!  @param[out] addrlen  the addrlen argument is a value-result argument: 
//!                       it should initially contain the size of the structure
//!                       pointed to by addr.
//!
//!  @return  For socket in blocking mode:
//!                      On success, socket handle. on failure negative
//!                  For socket in non-blocking mode:
//!                     - On connection establishment, socket handle
//!                     - On connection pending, SOC_IN_PROGRESS (-2)
//!                   - On failure, SOC_ERROR    (-1)
//!
//!  @brief  accept a connection on a socket:
//!          This function is used with connection-based socket types 
//!          (SOCK_STREAM). It extracts the first connection request on the 
//!          queue of pending connections, creates a new connected socket, and
//!          returns a new file descriptor referring to that socket.
//!          The newly created socket is not in the listening state. 
//!          The original socket sd is unaffected by this call. 
//!          The argument sd is a socket that has been created with socket(),
//!          bound to a local address with bind(), and is  listening for 
//!          connections after a listen(). The argument addr is a pointer 
//!          to a sockaddr structure. This structure is filled in with the 
//!          address of the peer socket, as known to the communications layer.
//!          The exact format of the address returned addr is determined by the 
//!          socket's address family. The addrlen argument is a value-result
//!          argument: it should initially contain the size of the structure
//!          pointed to by addr, on return it will contain the actual 
//!          length (in bytes) of the address returned.
//!
//! @sa     socket ; bind ; listen
//
//*****************************************************************************

long
accept(long sd, sockaddr *addr, socklen_t *addrlen)
{
    long ret;
    unsigned char *ptr, *args;
    tBsdReturnParams tAcceptReturnArguments;
    
    ret = EFAIL;
    ptr = tSLInformation.pucTxCommandBuffer;
    args = (ptr + HEADERS_SIZE_CMD);
    
    // Fill in temporary command buffer
    args = UINT32_TO_STREAM(args, sd);
    
    // Initiate a HCI command
    hci_command_send(HCI_CMND_ACCEPT, ptr, SOCKET_ACCEPT_PARAMS_LEN);
    
    // Since we are in blocking state - wait for event complete
    SimpleLinkWaitEvent(HCI_CMND_ACCEPT, (long*)&tAcceptReturnArguments);
    
    
    // need specify return parameters!!!
    memcpy(addr, &tAcceptReturnArguments.tSocketAddress, ASIC_ADDR_LEN);
    *addrlen = ASIC_ADDR_LEN;
    errno = tAcceptReturnArguments.iStatus; 
    ret = errno;
    
    // if succeeded, iStatus = new socket descriptor. otherwise - error number 
    if(M_IS_VALID_SD(ret))
    {
        set_socket_active_status(ret, SOCKET_STATUS_ACTIVE);
    }
    else
    {
        set_socket_active_status(sd, SOCKET_STATUS_INACTIVE);
    }
    
    return(ret);
}

//*****************************************************************************
//
//! bind
//!
//!  @param[in]   sd      socket descriptor (handle)              
//!  @param[out]  addr    specifies the destination address. On this version 
//!                       only AF_INET is supported.
//!  @param[out] addrlen  contains the size of the structure pointed to by addr.
//!
//!  @return      On success, zero is returned. On error, -1 is returned.
//!
//!  @brief  assign a name to a socket
//!          This function gives the socket the local address addr.
//!          addr is addrlen bytes long. Traditionally, this is called when a 
//!          socket is created with socket, it exists in a name space (address 
//!          family) but has no name assigned.
//!          It is necessary to assign a local address before a SOCK_STREAM
//!          socket may receive connections.
//!
//! @sa     socket ; accept ; listen
//
//*****************************************************************************

long
bind(long sd, const sockaddr *addr, long addrlen)
{
    long ret;
    unsigned char *ptr, *args;
    
    ret = EFAIL;
    ptr = tSLInformation.pucTxCommandBuffer;
    args = (ptr + HEADERS_SIZE_CMD);
    
    addrlen = ASIC_ADDR_LEN;
    
    // Fill in temporary command buffer
    args = UINT32_TO_STREAM(args, sd);
    args = UINT32_TO_STREAM(args, 0x00000008);
    args = UINT32_TO_STREAM(args, addrlen);
    ARRAY_TO_STREAM(args, ((unsigned char *)addr), addrlen);
    
    // Initiate a HCI command
    hci_command_send(HCI_CMND_BIND, ptr, SOCKET_BIND_PARAMS_LEN);
    
    // Since we are in blocking state - wait for event complete
    SimpleLinkWaitEvent(HCI_CMND_BIND, &ret);
    
    errno = ret;
  
    return(ret);
}

//*****************************************************************************
//
//! listen
//!
//!  @param[in]   sd      socket descriptor (handle)              
//!  @param[in]  backlog  specifies the listen queue depth. On this version
//!                       backlog is not supported.
//!  @return      On success, zero is returned. On error, -1 is returned.
//!
//!  @brief  listen for connections on a socket
//!          The willingness to accept incoming connections and a queue
//!          limit for incoming connections are specified with listen(),
//!          and then the connections are accepted with accept.
//!          The listen() call applies only to sockets of type SOCK_STREAM
//!          The backlog parameter defines the maximum length the queue of
//!          pending connections may grow to. 
//!
//! @sa     socket ; accept ; bind
//!
//! @note   On this version, backlog is not supported
//
//*****************************************************************************

long
listen(long sd, long backlog)
{
    long ret;
    unsigned char *ptr, *args;
    
    ret = EFAIL;
    ptr = tSLInformation.pucTxCommandBuffer;
    args = (ptr + HEADERS_SIZE_CMD);
    
    // Fill in temporary command buffer
    args = UINT32_TO_STREAM(args, sd);
    args = UINT32_TO_STREAM(args, backlog);
    
    // Initiate a HCI command
    hci_command_send(HCI_CMND_LISTEN, ptr, SOCKET_LISTEN_PARAMS_LEN);
    
    // Since we are in blocking state - wait for event complete
    SimpleLinkWaitEvent(HCI_CMND_LISTEN, &ret);
    errno = ret;
    
    return(ret);
}

//*****************************************************************************
//
//! gethostbyname
//!
//!  @param[in]   hostname     host name              
//!  @param[in]   usNameLen    name length 
//!  @param[out]  out_ip_addr  This parameter is filled in with host IP address. 
//!                            In case that host name is not resolved, 
//!                            out_ip_addr is zero.                  
//!  @return      On success, positive is returned. On error, negative is returned
//!
//!  @brief  Get host IP by name. Obtain the IP Address of machine on network, 
//!          by its name.
//!
//!  @note  On this version, only blocking mode is supported. Also note that
//!             the function requires DNS server to be configured prior to its usage.
//
//*****************************************************************************

#ifndef CC3000_TINY_DRIVER
int 
gethostbyname(char * hostname, unsigned short usNameLen, unsigned long* out_ip_addr)
{
    tBsdGethostbynameParams ret;
    unsigned char *ptr, *args;
    
    errno = EFAIL;
    
    if (usNameLen > HOSTNAME_MAX_LENGTH)
    {
        return errno;
    }
    
    ptr = tSLInformation.pucTxCommandBuffer;
    args = (ptr + SIMPLE_LINK_HCI_CMND_TRANSPORT_HEADER_SIZE);
    
    // Fill in HCI packet structure
    args = UINT32_TO_STREAM(args, 8);
    args = UINT32_TO_STREAM(args, usNameLen);
    ARRAY_TO_STREAM(args, hostname, usNameLen);
    
    // Initiate a HCI command
    hci_command_send(HCI_CMND_GETHOSTNAME, ptr, SOCKET_GET_HOST_BY_NAME_PARAMS_LEN + usNameLen - 1);
    
    // Since we are in blocking state - wait for event complete
    SimpleLinkWaitEvent(HCI_EVNT_BSD_GETHOSTBYNAME, (long*)&ret);
    
    errno = ret.retVal;
    
    (*((long*)out_ip_addr)) = ret.outputAddress;
    
    return (errno);
    
}
#endif

//*****************************************************************************
//
//! connect
//!
//!  @param[in]   sd       socket descriptor (handle)         
//!  @param[in]   addr     specifies the destination addr. On this version
//!                        only AF_INET is supported.
//!  @param[out]  addrlen  contains the size of the structure pointed to by addr    
//!  @return      On success, zero is returned. On error, -1 is returned
//!
//!  @brief  initiate a connection on a socket 
//!          Function connects the socket referred to by the socket descriptor 
//!          sd, to the address specified by addr. The addrlen argument 
//!          specifies the size of addr. The format of the address in addr is 
//!          determined by the address space of the socket. If it is of type 
//!          SOCK_DGRAM, this call specifies the peer with which the socket is 
//!          to be associated; this address is that to which datagrams are to be
//!          sent, and the only address from which datagrams are to be received.  
//!          If the socket is of type SOCK_STREAM, this call attempts to make a 
//!          connection to another socket. The other socket is specified  by 
//!          address, which is an address in the communications space of the
//!          socket. Note that the function implements only blocking behavior 
//!          thus the caller will be waiting either for the connection 
//!          establishment or for the connection establishment failure.
//!
//!  @sa socket
//
//*****************************************************************************

long
connect(long sd, const sockaddr *addr, long addrlen)
{
    long int ret;
    unsigned char *ptr, *args;
    
    ret = EFAIL;
    ptr = tSLInformation.pucTxCommandBuffer;
    args = (ptr + SIMPLE_LINK_HCI_CMND_TRANSPORT_HEADER_SIZE);
    addrlen = 8;
    
    // Fill in temporary command buffer
    args = UINT32_TO_STREAM(args, sd);
    args = UINT32_TO_STREAM(args, 0x00000008);
    args = UINT32_TO_STREAM(args, addrlen);
    ARRAY_TO_STREAM(args, ((unsigned char *)addr), addrlen);
    
    // Initiate a HCI command
    hci_command_send(HCI_CMND_CONNECT,
                                     ptr, SOCKET_CONNECT_PARAMS_LEN);
    
    // Since we are in blocking state - wait for event complete
    SimpleLinkWaitEvent(HCI_CMND_CONNECT, &ret);
    
    errno = ret;
    
    return((long)ret);
}


//*****************************************************************************
//
//! select
//!
//!  @param[in]   nfds       the highest-numbered file descriptor in any of the
//!                           three sets, plus 1.     
//!  @param[out]   writesds   socket descriptors list for write monitoring
//!  @param[out]   readsds    socket descriptors list for read monitoring  
//!  @param[out]   exceptsds  socket descriptors list for exception monitoring
//!  @param[in]   timeout     is an upper bound on the amount of time elapsed
//!                           before select() returns. Null means infinity 
//!                           timeout. The minimum timeout is 5 milliseconds,
//!                          less than 5 milliseconds will be set
//!                           automatically to 5 milliseconds.
//!  @return      On success, select() returns the number of file descriptors
//!             contained in the three returned descriptor sets (that is, the
//!             total number of bits that are set in readfds, writefds,
//!             exceptfds) which may be zero if the timeout expires before
//!             anything interesting  happens.
//!             On error, -1 is returned.
//!                   *readsds - return the sockets on which Read request will
//!                              return without delay with valid data.
//!                   *writesds - return the sockets on which Write request 
//!                                 will return without delay.
//!                   *exceptsds - return the sockets which closed recently.
//!
//!  @brief  Monitor socket activity  
//!          Select allow a program to monitor multiple file descriptors,
//!          waiting until one or more of the file descriptors become 
//!         "ready" for some class of I/O operation 
//!
//!  @Note   If the timeout value set to less than 5ms it will automatically set
//!          to 5ms to prevent overload of the system
//!
//!  @sa socket
//
//*****************************************************************************

int
select(long nfds, fd_set *readsds, fd_set *writesds, fd_set *exceptsds, 
       struct timeval *timeout)
{
    unsigned char *ptr, *args;
    tBsdSelectRecvParams tParams;
    unsigned long is_blocking;
    
    if( timeout == NULL)
    {
        is_blocking = 1; /* blocking , infinity timeout */
    }
    else
    {
        is_blocking = 0; /* no blocking, timeout */
    }
    
    // Fill in HCI packet structure
    ptr = tSLInformation.pucTxCommandBuffer;
    args = (ptr + HEADERS_SIZE_CMD);
    
    // Fill in temporary command buffer
    args = UINT32_TO_STREAM(args, nfds);
    args = UINT32_TO_STREAM(args, 0x00000014);
    args = UINT32_TO_STREAM(args, 0x00000014);
    args = UINT32_TO_STREAM(args, 0x00000014);
    args = UINT32_TO_STREAM(args, 0x00000014);
    args = UINT32_TO_STREAM(args, is_blocking);
    args = UINT32_TO_STREAM(args, ((readsds) ? *(unsigned long*)readsds : 0));
    args = UINT32_TO_STREAM(args, ((writesds) ? *(unsigned long*)writesds : 0));
    args = UINT32_TO_STREAM(args, ((exceptsds) ? *(unsigned long*)exceptsds : 0));
    
    if (timeout)
    {
        if ( 0 == timeout->tv_sec && timeout->tv_usec < 
                SELECT_TIMEOUT_MIN_MICRO_SECONDS)
        {
            timeout->tv_usec = SELECT_TIMEOUT_MIN_MICRO_SECONDS;
        }
        args = UINT32_TO_STREAM(args, timeout->tv_sec);
        args = UINT32_TO_STREAM(args, timeout->tv_usec);
    }
    
    // Initiate a HCI command
    hci_command_send(HCI_CMND_BSD_SELECT, ptr, SOCKET_SELECT_PARAMS_LEN);
    
    // Since we are in blocking state - wait for event complete
    SimpleLinkWaitEvent(HCI_EVNT_SELECT, (long*)&tParams);
    
    // Update actually read FD
    if (tParams.iStatus >= 0)
    {
        if (readsds)
        {
            memcpy(readsds, &tParams.uiRdfd, sizeof(tParams.uiRdfd));
        }
        
        if (writesds)
        {
            memcpy(writesds, &tParams.uiWrfd, sizeof(tParams.uiWrfd)); 
        }
        
        if (exceptsds)
        {
            memcpy(exceptsds, &tParams.uiExfd, sizeof(tParams.uiExfd)); 
        }
        
        return(tParams.iStatus);
        
    }
    else
    {
        errno = tParams.iStatus;
        return(-1);
    }
}

//*****************************************************************************
//
//! setsockopt
//!
//!  @param[in]   sd          socket handle
//!  @param[in]   level       defines the protocol level for this option
//!  @param[in]   optname     defines the option name to Interrogate
//!  @param[in]   optval      specifies a value for the option
//!  @param[in]   optlen      specifies the length of the option value
//!  @return      On success, zero is returned. On error, -1 is returned
//!
//!  @brief  set socket options
//!          This function manipulate the options associated with a socket.
//!          Options may exist at multiple protocol levels; they are always
//!          present at the uppermost socket level.
//!          When manipulating socket options the level at which the option 
//!          resides and the name of the option must be specified.  
//!          To manipulate options at the socket level, level is specified as 
//!          SOL_SOCKET. To manipulate options at any other level the protocol 
//!          number of the appropriate protocol controlling the option is 
//!          supplied. For example, to indicate that an option is to be 
//!          interpreted by the TCP protocol, level should be set to the 
//!          protocol number of TCP; 
//!          The parameters optval and optlen are used to access optval - 
//!          use for setsockopt(). For getsockopt() they identify a buffer
//!          in which the value for the requested option(s) are to 
//!          be returned. For getsockopt(), optlen is a value-result 
//!          parameter, initially containing the size of the buffer 
//!          pointed to by option_value, and modified on return to 
//!          indicate the actual size of the value returned. If no option 
//!          value is to be supplied or returned, option_value may be NULL.
//!
//!  @Note   On this version the following two socket options are enabled:
//!                 The only protocol level supported in this version
//!          is SOL_SOCKET (level).
//!               1. SOCKOPT_RECV_TIMEOUT (optname)
//!                  SOCKOPT_RECV_TIMEOUT configures recv and recvfrom timeout 
//!           in milliseconds.
//!                In that case optval should be pointer to unsigned long.
//!               2. SOCKOPT_NONBLOCK (optname). sets the socket non-blocking mode on 
//!           or off.
//!                In that case optval should be SOCK_ON or SOCK_OFF (optval).
//!
//!  @sa getsockopt
//
//*****************************************************************************

#ifndef CC3000_TINY_DRIVER
int
setsockopt(long sd, long level, long optname, const void *optval,
                     socklen_t optlen)
{
    int ret;
    unsigned char *ptr, *args;
    
    ptr = tSLInformation.pucTxCommandBuffer;
    args = (ptr + HEADERS_SIZE_CMD);
    
    // Fill in temporary command buffer
    args = UINT32_TO_STREAM(args, sd);
    args = UINT32_TO_STREAM(args, level);
    args = UINT32_TO_STREAM(args, optname);
    args = UINT32_TO_STREAM(args, 0x00000008);
    args = UINT32_TO_STREAM(args, optlen);
    ARRAY_TO_STREAM(args, ((unsigned char *)optval), optlen);
    
    // Initiate a HCI command
    hci_command_send(HCI_CMND_SETSOCKOPT, ptr, SOCKET_SET_SOCK_OPT_PARAMS_LEN  + optlen);
    
    // Since we are in blocking state - wait for event complete
    SimpleLinkWaitEvent(HCI_CMND_SETSOCKOPT, (long*)&ret);
    
    if (ret >= 0)
    {
        return (0);
    }
    else
    {
        errno = ret;
        return (errno);
    }
}
#endif

//*****************************************************************************
//
//! getsockopt
//!
//!  @param[in]   sd          socket handle
//!  @param[in]   level       defines the protocol level for this option
//!  @param[in]   optname     defines the option name to Interrogate
//!  @param[out]   optval      specifies a value for the option
//!  @param[out]   optlen      specifies the length of the option value
//!  @return      On success, zero is returned. On error, -1 is returned
//!
//!  @brief  set socket options
//!          This function manipulate the options associated with a socket.
//!          Options may exist at multiple protocol levels; they are always
//!          present at the uppermost socket level.
//!          When manipulating socket options the level at which the option 
//!          resides and the name of the option must be specified.  
//!          To manipulate options at the socket level, level is specified as 
//!          SOL_SOCKET. To manipulate options at any other level the protocol 
//!          number of the appropriate protocol controlling the option is 
//!          supplied. For example, to indicate that an option is to be 
//!          interpreted by the TCP protocol, level should be set to the 
//!          protocol number of TCP; 
//!          The parameters optval and optlen are used to access optval - 
//!          use for setsockopt(). For getsockopt() they identify a buffer
//!          in which the value for the requested option(s) are to 
//!          be returned. For getsockopt(), optlen is a value-result 
//!          parameter, initially containing the size of the buffer 
//!          pointed to by option_value, and modified on return to 
//!          indicate the actual size of the value returned. If no option 
//!          value is to be supplied or returned, option_value may be NULL.
//!
//!  @Note   On this version the following two socket options are enabled:
//!                 The only protocol level supported in this version
//!          is SOL_SOCKET (level).
//!               1. SOCKOPT_RECV_TIMEOUT (optname)
//!                  SOCKOPT_RECV_TIMEOUT configures recv and recvfrom timeout 
//!           in milliseconds.
//!                In that case optval should be pointer to unsigned long.
//!               2. SOCKOPT_NONBLOCK (optname). sets the socket non-blocking mode on 
//!           or off.
//!                In that case optval should be SOCK_ON or SOCK_OFF (optval).
//!
//!  @sa setsockopt
//
//*****************************************************************************

int
getsockopt (long sd, long level, long optname, void *optval, socklen_t *optlen)
{
    unsigned char *ptr, *args;
    tBsdGetSockOptReturnParams  tRetParams;
    
    ptr = tSLInformation.pucTxCommandBuffer;
    args = (ptr + HEADERS_SIZE_CMD);
    
    // Fill in temporary command buffer
    args = UINT32_TO_STREAM(args, sd);
    args = UINT32_TO_STREAM(args, level);
    args = UINT32_TO_STREAM(args, optname);
    
    // Initiate a HCI command
    hci_command_send(HCI_CMND_GETSOCKOPT, ptr, SOCKET_GET_SOCK_OPT_PARAMS_LEN);
    
    // Since we are in blocking state - wait for event complete
    SimpleLinkWaitEvent(HCI_CMND_GETSOCKOPT, (long*)&tRetParams);
    
    if (((signed char)tRetParams.iStatus) >= 0)
    {
        *optlen = 4;
        memcpy(optval, tRetParams.ucOptValue, 4);
        return (0);
    }
    else
    {
        errno = tRetParams.iStatus;
        return (errno);
    }
}

//*****************************************************************************
//
//!  simple_link_recv
//!
//!  @param sd       socket handle
//!  @param buf      read buffer
//!  @param len      buffer length
//!  @param flags    indicates blocking or non-blocking operation
//!  @param from     pointer to an address structure indicating source address
//!  @param fromlen  source address structure size
//!
//!  @return         Return the number of bytes received, or -1 if an error
//!                  occurred
//!
//!  @brief          Read data from socket
//!                  Return the length of the message on successful completion.
//!                  If a message is too long to fit in the supplied buffer,
//!                  excess bytes may be discarded depending on the type of
//!                  socket the message is received from
//
//*****************************************************************************
int
simple_link_recv(long sd, unsigned char *buf, long len, long flags, sockaddr *from, socklen_t *fromlen, long opcode)
{
    unsigned char *ptr, *args;
    tBsdReadReturnParams tSocketReadEvent;
    
    ptr = tSLInformation.pucTxCommandBuffer;
    args = (ptr + HEADERS_SIZE_CMD);
    
    // Fill in HCI packet structure
    args = UINT32_TO_STREAM(args, sd);
    args = UINT32_TO_STREAM(args, len);
    args = UINT32_TO_STREAM(args, flags);
    
    // Generate the read command, and wait for the 
    hci_command_send(opcode,  ptr, SOCKET_RECV_FROM_PARAMS_LEN);
    
    // Since we are in blocking state - wait for event complete
    SimpleLinkWaitEvent(opcode, (long*)&tSocketReadEvent);
    
    // In case the number of bytes is more then zero - read data
    if (tSocketReadEvent.iNumberOfBytes > 0)
    {
        // Wait for the data in a synchronous way. Here we assume that the bug is 
        // big enough to store also parameters of receive from too....
        SimpleLinkWaitData(buf, (unsigned char *)from, (unsigned char *)fromlen);
    }
    
    errno = tSocketReadEvent.iNumberOfBytes;
    
    return(tSocketReadEvent.iNumberOfBytes);
}

//*****************************************************************************
//
//!  recv
//!
//!  @param[in]  sd     socket handle
//!  @param[out] buf    Points to the buffer where the message should be stored
//!  @param[in]  len    Specifies the length in bytes of the buffer pointed to 
//!                     by the buffer argument.
//!  @param[in] flags   Specifies the type of message reception. 
//!                     On this version, this parameter is not supported.
//!
//!  @return         Return the number of bytes received, or -1 if an error
//!                  occurred
//!
//!  @brief          function receives a message from a connection-mode socket
//!
//!  @sa recvfrom
//!
//!  @Note On this version, only blocking mode is supported.
//
//*****************************************************************************

int
recv(long sd, unsigned char *buf, long len, long flags)
{
    return(simple_link_recv(sd, buf, len, flags, NULL, NULL, HCI_CMND_RECV));
}

//*****************************************************************************
//
//!  recvfrom
//!
//!  @param[in]  sd     socket handle
//!  @param[out] buf    Points to the buffer where the message should be stored
//!  @param[in]  len    Specifies the length in bytes of the buffer pointed to 
//!                     by the buffer argument.
//!  @param[in] flags   Specifies the type of message reception. 
//!                     On this version, this parameter is not supported.
//!  @param[in] from   pointer to an address structure indicating the source
//!                    address: sockaddr. On this version only AF_INET is
//!                    supported.
//!  @param[in] fromlen   source address tructure size
//!
//!  @return         Return the number of bytes received, or -1 if an error
//!                  occurred
//!
//!  @brief         read data from socket
//!                 function receives a message from a connection-mode or
//!                 connectionless-mode socket. Note that raw sockets are not
//!                 supported.
//!
//!  @sa recv
//!
//!  @Note On this version, only blocking mode is supported.
//
//*****************************************************************************
int
recvfrom(long sd, unsigned char *buf, long len, long flags, sockaddr *from, socklen_t *fromlen)
{
    return(simple_link_recv(sd, buf, len, flags, from, fromlen, HCI_CMND_RECVFROM));
}

//*****************************************************************************
//
//!  simple_link_send
//!
//!  @param sd       socket handle
//!  @param buf      write buffer
//!  @param len      buffer length
//!  @param flags    On this version, this parameter is not supported
//!  @param to       pointer to an address structure indicating destination
//!                  address
//!  @param tolen    destination address structure size
//!
//!  @return         Return the number of bytes transmitted, or -1 if an error
//!                  occurred, or -2 in case there are no free buffers available
//!                 (only when SEND_NON_BLOCKING is enabled)
//!
//!  @brief          This function is used to transmit a message to another
//!                  socket
//
//*****************************************************************************
int
simple_link_send(long sd, const void *buf, long len, long flags, const sockaddr *to, long tolen, long opcode)
{    
    unsigned char uArgSize,  addrlen;
    unsigned char *ptr, *pDataPtr, *args;
    unsigned long addr_offset;
    int res;
        tBsdReadReturnParams tSocketSendEvent;
    
    // Check the bsd_arguments
    if (0 != (res = HostFlowControlConsumeBuff(sd)))
    {
        return res;
    }
    
    //Update the number of sent packets
    tSLInformation.NumberOfSentPackets++;
    
    // Allocate a buffer and construct a packet and send it over spi
    ptr = tSLInformation.pucTxCommandBuffer;
    args = (ptr + HEADERS_SIZE_DATA);
    
    // Update the offset of data and parameters according to the command
    switch(opcode)
    { 
    case HCI_CMND_SENDTO:
        {
            addr_offset = len + sizeof(len) + sizeof(len);
            addrlen = 8;
            uArgSize = SOCKET_SENDTO_PARAMS_LEN;
            pDataPtr = ptr + HEADERS_SIZE_DATA + SOCKET_SENDTO_PARAMS_LEN;
            break;
        }
        
    case HCI_CMND_SEND:
        {
            tolen = 0;
            to = NULL;
            uArgSize = HCI_CMND_SEND_ARG_LENGTH;
            pDataPtr = ptr + HEADERS_SIZE_DATA + HCI_CMND_SEND_ARG_LENGTH;
            break;
        }
        
    default:
        {
            break;
        }
    }
    
    // Fill in temporary command buffer
    args = UINT32_TO_STREAM(args, sd);
    args = UINT32_TO_STREAM(args, uArgSize - sizeof(sd));
    args = UINT32_TO_STREAM(args, len);
    args = UINT32_TO_STREAM(args, flags);
    
    if (opcode == HCI_CMND_SENDTO)
    {
        args = UINT32_TO_STREAM(args, addr_offset);
        args = UINT32_TO_STREAM(args, addrlen);
    }
    
    // Copy the data received from user into the TX Buffer
    ARRAY_TO_STREAM(pDataPtr, ((unsigned char *)buf), len);
    
    // In case we are using SendTo, copy the to parameters
    if (opcode == HCI_CMND_SENDTO)
    {    
        ARRAY_TO_STREAM(pDataPtr, ((unsigned char *)to), tolen);
    }
    
    // Initiate a HCI command
    hci_data_send(opcode, ptr, uArgSize, len,(unsigned char*)to, tolen);
        
         if (opcode == HCI_CMND_SENDTO)
            SimpleLinkWaitEvent(HCI_EVNT_SENDTO, (long*)&tSocketSendEvent);
         else
            SimpleLinkWaitEvent(HCI_EVNT_SEND, (long*)&tSocketSendEvent);
    
    return    (len);
}


//*****************************************************************************
//
//!  send
//!
//!  @param sd       socket handle
//!  @param buf      Points to a buffer containing the message to be sent
//!  @param len      message size in bytes
//!  @param flags    On this version, this parameter is not supported
//!
//!  @return         Return the number of bytes transmitted, or -1 if an
//!                  error occurred
//!
//!  @brief          Write data to TCP socket
//!                  This function is used to transmit a message to another 
//!                  socket.
//!
//!  @Note           On this version, only blocking mode is supported.
//!
//!  @sa             sendto
//
//*****************************************************************************

int
send(long sd, const void *buf, long len, long flags)
{
    return(simple_link_send(sd, buf, len, flags, NULL, 0, HCI_CMND_SEND));
}

//*****************************************************************************
//
//!  sendto
//!
//!  @param sd       socket handle
//!  @param buf      Points to a buffer containing the message to be sent
//!  @param len      message size in bytes
//!  @param flags    On this version, this parameter is not supported
//!  @param to       pointer to an address structure indicating the destination
//!                  address: sockaddr. On this version only AF_INET is
//!                  supported.
//!  @param tolen    destination address structure size
//!
//!  @return         Return the number of bytes transmitted, or -1 if an
//!                  error occurred
//!
//!  @brief          Write data to TCP socket
//!                  This function is used to transmit a message to another 
//!                  socket.
//!
//!  @Note           On this version, only blocking mode is supported.
//!
//!  @sa             send
//
//*****************************************************************************

int
sendto(long sd, const void *buf, long len, long flags, const sockaddr *to, socklen_t tolen)
{
    return(simple_link_send(sd, buf, len, flags, to, tolen, HCI_CMND_SENDTO));
}

//*****************************************************************************
//
//!  mdnsAdvertiser
//!
//!  @param[in] mdnsEnabled         flag to enable/disable the mDNS feature
//!  @param[in] deviceServiceName   Service name as part of the published
//!                                 canonical domain name
//!  @param[in] deviceServiceNameLength   Length of the service name
//!  
//!
//!  @return   On success, zero is returned, return SOC_ERROR if socket was not 
//!            opened successfully, or if an error occurred.
//!
//!  @brief    Set CC3000 in mDNS advertiser mode in order to advertise itself.
//
//*****************************************************************************

int
mdnsAdvertiser(unsigned short mdnsEnabled, char * deviceServiceName, unsigned short deviceServiceNameLength)
{
    int ret;
     unsigned char *pTxBuffer, *pArgs;
    
    if (deviceServiceNameLength > MDNS_DEVICE_SERVICE_MAX_LENGTH)
    {
        return EFAIL;
    }
    
    pTxBuffer = tSLInformation.pucTxCommandBuffer;
    pArgs = (pTxBuffer + SIMPLE_LINK_HCI_CMND_TRANSPORT_HEADER_SIZE);
    
    // Fill in HCI packet structure
    pArgs = UINT32_TO_STREAM(pArgs, mdnsEnabled);
    pArgs = UINT32_TO_STREAM(pArgs, 8);
    pArgs = UINT32_TO_STREAM(pArgs, deviceServiceNameLength);
    ARRAY_TO_STREAM(pArgs, deviceServiceName, deviceServiceNameLength);
    
    // Initiate a HCI command
    hci_command_send(HCI_CMND_MDNS_ADVERTISE, pTxBuffer, SOCKET_MDNS_ADVERTISE_PARAMS_LEN + deviceServiceNameLength);
    
    // Since we are in blocking state - wait for event complete
    SimpleLinkWaitEvent(HCI_EVNT_MDNS_ADVERTISE, (long*)&ret);
    
    return ret;
    
}