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ssdp_device.c

///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2000-2003 Intel Corporation
// All rights reserved. 
//
// 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 name of Intel Corporation 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 INTEL 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.
//
///////////////////////////////////////////////////////////////////////////

#include "config.h"

#ifdef INCLUDE_DEVICE_APIS
#if EXCLUDE_SSDP == 0

#include <assert.h>
#include <stdio.h>
#include <string.h>

#include "ssdplib.h"
#include "upnpapi.h"
#include "ThreadPool.h"
#include "httpparser.h"
#include "httpreadwrite.h"
#include "statcodes.h"
#include "unixutil.h"

#ifdef WIN32
      #include <ws2tcpip.h>
      #include <winsock2.h>
#endif /* WIN32 */

#define MSGTYPE_SHUTDOWN      0
#define MSGTYPE_ADVERTISEMENT 1
#define MSGTYPE_REPLY         2

/************************************************************************
* Function : advertiseAndReplyThread
*
* Parameters:
*     IN void *data: Structure containing the search request
*
* Description:
*     This function is a wrapper function to reply the search request
*     coming from the control point.
*
* Returns: void *
*     always return NULL
***************************************************************************/
void *
advertiseAndReplyThread( IN void *data )
{
    SsdpSearchReply *arg = ( SsdpSearchReply * ) data;

    AdvertiseAndReply( 0, arg->handle,
                       arg->event.RequestType,
                       (struct sockaddr*)&arg->dest_addr,
                       arg->event.DeviceType,
                       arg->event.UDN,
                       arg->event.ServiceType, arg->MaxAge );
    free( arg );

    return NULL;
}

/************************************************************************
* Function : ssdp_handle_device_request
*
* Parameters:
*     IN http_message_t *hmsg: SSDP search request from the control point
*     IN struct sockaddr *dest_addr: The address info of control point
*
* Description:
*     This function handles the search request. It do the sanity checks of
*     the request and then schedules a thread to send a random time reply (
*     random within maximum time given by the control point to reply).
*
* Returns: void *
*     1 if successful else appropriate error
***************************************************************************/
#ifdef INCLUDE_DEVICE_APIS
void
ssdp_handle_device_request( IN http_message_t *hmsg,
                            IN struct sockaddr *dest_addr )
{
#define MX_FUDGE_FACTOR 10

    int handle;
    struct Handle_Info *dev_info = NULL;
    memptr hdr_value;
    int mx;
    char save_char;
    SsdpEvent event;
    int ret_code;
    SsdpSearchReply *threadArg = NULL;
    ThreadPoolJob job;
    int replyTime;
    int maxAge;

    // check man hdr
    if( httpmsg_find_hdr( hmsg, HDR_MAN, &hdr_value ) == NULL ||
        memptr_cmp( &hdr_value, "\"ssdp:discover\"" ) != 0 ) {
        return;                 // bad or missing hdr
    }
    // MX header
    if( httpmsg_find_hdr( hmsg, HDR_MX, &hdr_value ) == NULL ||
        ( mx = raw_to_int( &hdr_value, 10 ) ) < 0 ) {
        return;
    }
    // ST header
    if( httpmsg_find_hdr( hmsg, HDR_ST, &hdr_value ) == NULL ) {
        return;
    }
    save_char = hdr_value.buf[hdr_value.length];
    hdr_value.buf[hdr_value.length] = '\0';
    ret_code = ssdp_request_type( hdr_value.buf, &event );
    hdr_value.buf[hdr_value.length] = save_char;    // restore
    if( ret_code == -1 ) {
        return;                 // bad ST header
    }

    HandleLock();
    // device info
    if( GetDeviceHandleInfo( dest_addr->sa_family, 
        &handle, &dev_info ) != HND_DEVICE ) {
        HandleUnlock();
        return;                 // no info found
    }
    maxAge = dev_info->MaxAge;
    HandleUnlock();

    UpnpPrintf( UPNP_PACKET, API, __FILE__, __LINE__,
        "ssdp_handle_device_request with Cmd %d SEARCH\n",
        event.Cmd );
    UpnpPrintf( UPNP_PACKET, API, __FILE__, __LINE__,
        "MAX-AGE     =  %d\n", maxAge );
    UpnpPrintf( UPNP_PACKET, API, __FILE__, __LINE__,
        "MX     =  %d\n", event.Mx );
    UpnpPrintf( UPNP_PACKET, API, __FILE__, __LINE__,
        "DeviceType   =  %s\n", event.DeviceType );
    UpnpPrintf( UPNP_PACKET, API, __FILE__, __LINE__,
        "DeviceUuid   =  %s\n", event.UDN );
    UpnpPrintf( UPNP_PACKET, API, __FILE__, __LINE__,
        "ServiceType =  %s\n", event.ServiceType );

    threadArg =
        ( SsdpSearchReply * ) malloc( sizeof( SsdpSearchReply ) );

    if( threadArg == NULL ) {
        return;
    }
    threadArg->handle = handle;
    memcpy( &threadArg->dest_addr, dest_addr, sizeof(threadArg->dest_addr) );
    threadArg->event = event;
    threadArg->MaxAge = maxAge;

    TPJobInit( &job, advertiseAndReplyThread, threadArg );
    TPJobSetFreeFunction( &job, ( free_routine ) free );

    //Subtract a percentage from the mx
    //to allow for network and processing delays
    // (i.e. if search is for 30 seconds, 
    //       respond withing 0 - 27 seconds)

    if( mx >= 2 ) {
        mx -= MAXVAL( 1, mx / MX_FUDGE_FACTOR );
    }

    if( mx < 1 ) {
        mx = 1;
    }

    replyTime = rand() % mx;

    TimerThreadSchedule( &gTimerThread, replyTime, REL_SEC, &job,
                         SHORT_TERM, NULL );
}
#endif

/************************************************************************
* Function : NewRequestHandler
*
* Parameters:
*           IN struct sockaddr *DestAddr: Ip address, to send the reply.
*           IN int NumPacket: Number of packet to be sent.
*           IN char **RqPacket:Number of packet to be sent.
*
* Description:
*     This function works as a request handler which passes the HTTP
*     request string to multicast channel then
*
* Returns: void *
*     1 if successful else appropriate error
***************************************************************************/
static int
NewRequestHandler( IN struct sockaddr *DestAddr,
                   IN int NumPacket,
                   IN char **RqPacket )
{
    char errorBuffer[ERROR_BUFFER_LEN];
    SOCKET ReplySock;
    int socklen = sizeof( struct sockaddr_storage );
    int NumCopy;
    int Index;
    unsigned long replyAddr = inet_addr( gIF_IPV4 );
    int ttl = 4; // a/c to UPNP Spec
    int hops = 1;
    char buf_ntop[64];

    ReplySock = socket( DestAddr->sa_family, SOCK_DGRAM, 0 );
    if ( ReplySock == -1 ) {
        strerror_r(errno, errorBuffer, ERROR_BUFFER_LEN);
        UpnpPrintf( UPNP_INFO, SSDP, __FILE__, __LINE__,
            "SSDP_LIB: New Request Handler:"
            "Error in socket(): %s\n", errorBuffer );

        return UPNP_E_OUTOF_SOCKET;
    }
 
    if( DestAddr->sa_family == AF_INET ) {
        inet_ntop(AF_INET, &((struct sockaddr_in*)DestAddr)->sin_addr, 
            buf_ntop, sizeof(buf_ntop));
        setsockopt( ReplySock, IPPROTO_IP, IP_MULTICAST_IF,
            (char *)&replyAddr, sizeof (replyAddr) );
        setsockopt( ReplySock, IPPROTO_IP, IP_MULTICAST_TTL,
            (char *)&ttl, sizeof (int) );
    } else if( DestAddr->sa_family == AF_INET6 ) {
        inet_ntop(AF_INET6, &((struct sockaddr_in6*)DestAddr)->sin6_addr, 
            buf_ntop, sizeof(buf_ntop));
        setsockopt( ReplySock, IPPROTO_IPV6, IPV6_MULTICAST_IF,
            (char *)&gIF_INDEX, sizeof(gIF_INDEX) );
        setsockopt( ReplySock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
            (char *)&hops, sizeof(hops) );
    } else {
        UpnpPrintf( UPNP_CRITICAL, SSDP, __FILE__, __LINE__,
            "Invalid destination address specified." );
    }

    for( Index = 0; Index < NumPacket; Index++ ) {
        int rc;
        // The reason to keep this loop is purely historical/documentation,
        // according to section 9.2 of HTTPU spec:
        // 
        // "If a multicast resource would send a response(s) to any copy of the 
        //  request, it SHOULD send its response(s) to each copy of the request 
        //  it receives. It MUST NOT repeat its response(s) per copy of the 
        //  request."
        //  
        // http://www.upnp.org/download/draft-goland-http-udp-04.txt
        //
        // So, NUM_COPY has been changed from 2 to 1.
        NumCopy = 0;
        while( NumCopy < NUM_COPY ) {
            UpnpPrintf( UPNP_INFO, SSDP, __FILE__, __LINE__,
                ">>> SSDP SEND to %s >>>\n%s\n",
                buf_ntop, *( RqPacket + Index ) );
            rc = sendto( ReplySock, *( RqPacket + Index ),
                         strlen( *( RqPacket + Index ) ),
                         0, DestAddr, socklen );
            imillisleep( SSDP_PAUSE );
            ++NumCopy;
        }
    }

    shutdown( ReplySock, SD_BOTH );
    UpnpCloseSocket( ReplySock );

    return UPNP_E_SUCCESS;
}

/************************************************************************
* Function : CreateServiceRequestPacket
*
* Parameters:
*     IN int msg_type : type of the message ( Search Reply, Advertisement
*           or Shutdown )
*     IN char * nt : ssdp type
*     IN char * usn : unique service name ( go in the HTTP Header)
*     IN char * location :Location URL.
*     IN int  duration :Service duration in sec.
*     OUT char** packet :Output buffer filled with HTTP statement.
*     IN int AddressFamily: Address family of the HTTP request.
*
* Description:
*     This function creates a HTTP request packet.  Depending
*     on the input parameter it either creates a service advertisement
*     request or service shutdown request etc.
*
* Returns: void
*
***************************************************************************/
void
CreateServicePacket( IN int msg_type,
                     IN char *nt,
                     IN char *usn,
                     IN char *location,
                     IN int duration,
                     OUT char **packet,
                     IN int AddressFamily)
{
    int ret_code;
    char *nts;
    membuffer buf;

    //Notf=0 means service shutdown, 
    //Notf=1 means service advertisement, Notf =2 means reply   

    membuffer_init( &buf );
    buf.size_inc = 30;

    *packet = NULL;

    if( msg_type == MSGTYPE_REPLY ) {
        ret_code = http_MakeMessage(
            &buf, 1, 1,
            "R" "sdc" "D" "sc" "ssc" "ssc" "ssc" "S" "Xc" "ssc" "sscc",
            HTTP_OK,
            "CACHE-CONTROL: max-age=", duration,
          "EXT:",
            "LOCATION: ", location,
            "OPT: ", "\"http://schemas.upnp.org/upnp/1/0/\"; ns=01",
            "01-NLS: ", gUpnpSdkNLSuuid,
            X_USER_AGENT,
            "ST: ", nt,
            "USN: ", usn);
        if( ret_code != 0 ) {
            return;
        }
    } else if( msg_type == MSGTYPE_ADVERTISEMENT ||
               msg_type == MSGTYPE_SHUTDOWN ) {
        if( msg_type == MSGTYPE_ADVERTISEMENT ) {
            nts = "ssdp:alive";
        } else                  // shutdown
        {
            nts = "ssdp:byebye";
        }

        // NOTE: The CACHE-CONTROL and LOCATION headers are not present in
        //  a shutdown msg, but are present here for MS WinMe interop.

        ret_code = http_MakeMessage(
            &buf, 1, 1,
            "Q" "sssdc" "sdc" "ssc" "ssc" "ssc" "ssc" "ssc" "S" "Xc" "sscc",
            HTTPMETHOD_NOTIFY, "*", (size_t)1,
            "HOST: ", 
            (AddressFamily==AF_INET) ? SSDP_IP : "[" SSDP_IPV6_LINKLOCAL "]", 
            ":", SSDP_PORT,
            "CACHE-CONTROL: max-age=", duration,
            "LOCATION: ", location,
            "OPT: ", "\"http://schemas.upnp.org/upnp/1/0/\"; ns=01",
            "01-NLS: ", gUpnpSdkNLSuuid,
            "NT: ", nt,
            "NTS: ", nts,
            X_USER_AGENT,
            "USN: ", usn );
        if( ret_code != 0 ) {
            return;
        }

    } else {
        assert( 0 );            // unknown msg
    }

    *packet = membuffer_detach( &buf ); // return msg

    membuffer_destroy( &buf );

    return;
}

/************************************************************************
* Function : DeviceAdvertisement
*
* Parameters:
*     IN char * DevType : type of the device
*     IN int RootDev: flag to indicate if the device is root device
*     IN char * nt : ssdp type
*     IN char * usn : unique service name
*     IN char * location :Location URL.
*     IN int  duration :Service duration in sec.
*
* Description:
*     This function creates the device advertisement request based on 
*     the input parameter, and send it to the multicast channel.
*
* Returns: int
*     UPNP_E_SUCCESS if successful else appropriate error
***************************************************************************/
int
DeviceAdvertisement( IN char *DevType,
                     int RootDev,
                     char *Udn,
                     IN char *Location,
                     IN int Duration,
                     IN int AddressFamily)
{
    struct sockaddr_storage __ss;
    struct sockaddr_in* DestAddr4 = (struct sockaddr_in*)&__ss;
    struct sockaddr_in6* DestAddr6 = (struct sockaddr_in6*)&__ss;

    //char Mil_Nt[LINE_SIZE]
    char Mil_Usn[LINE_SIZE];
    char *msgs[3];
    int ret_code;

    UpnpPrintf( UPNP_INFO, SSDP, __FILE__, __LINE__,
        "In function DeviceAdvertisement\n" );

    memset( &__ss, 0, sizeof(__ss) );
    if( AddressFamily == AF_INET ) {
        DestAddr4->sin_family = AF_INET;
        inet_pton( AF_INET, SSDP_IP, &DestAddr4->sin_addr );
        DestAddr4->sin_port = htons( SSDP_PORT );
    } else if( AddressFamily == AF_INET6 ) {
        DestAddr6->sin6_family = AF_INET6;
        inet_pton( AF_INET6, SSDP_IPV6_LINKLOCAL, &DestAddr6->sin6_addr );
        DestAddr6->sin6_port = htons( SSDP_PORT );
        DestAddr6->sin6_scope_id = gIF_INDEX;
    } else {
        UpnpPrintf( UPNP_CRITICAL, SSDP, __FILE__, __LINE__,
            "Invalid device address family.\n" );
    }

    msgs[0] = NULL;
    msgs[1] = NULL;
    msgs[2] = NULL;

    //If deviceis a root device , here we need to 
    //send 3 advertisement or reply
    if( RootDev ) {
        sprintf( Mil_Usn, "%s::upnp:rootdevice", Udn );
        CreateServicePacket( MSGTYPE_ADVERTISEMENT, "upnp:rootdevice",
            Mil_Usn, Location, Duration, &msgs[0], AddressFamily );
    }
    // both root and sub-devices need to send these two messages
    //

    CreateServicePacket( MSGTYPE_ADVERTISEMENT, Udn, Udn,
                         Location, Duration, &msgs[1], AddressFamily );

    sprintf( Mil_Usn, "%s::%s", Udn, DevType );
    CreateServicePacket( MSGTYPE_ADVERTISEMENT, DevType, Mil_Usn,
                         Location, Duration, &msgs[2], AddressFamily );

    // check error
    if( ( RootDev && msgs[0] == NULL ) ||
        msgs[1] == NULL || msgs[2] == NULL ) {
        free( msgs[0] );
        free( msgs[1] );
        free( msgs[2] );
        return UPNP_E_OUTOF_MEMORY;
    }
    // send packets
    if( RootDev ) {
        // send 3 msg types
        ret_code = NewRequestHandler( (struct sockaddr*)&__ss, 3, &msgs[0] );
    } else                      // sub-device
    {
        // send 2 msg types
        ret_code = NewRequestHandler( (struct sockaddr*)&__ss, 2, &msgs[1] );
    }

    // free msgs
    free( msgs[0] );
    free( msgs[1] );
    free( msgs[2] );

    return ret_code;
}

/************************************************************************
* Function : SendReply
*
* Parameters:
*     IN struct sockaddr * DestAddr:destination IP address.
*     IN char *DevType: Device type
*     IN int RootDev: 1 means root device 0 means embedded device.
*     IN char * Udn: Device UDN
*     IN char * Location: Location of Device description document.
*     IN int  Duration :Life time of this device.
*     IN int ByType:
*
* Description:
*     This function creates the reply packet based on the input parameter, 
*     and send it to the client addesss given in its input parameter DestAddr.
*
* Returns: int
*     UPNP_E_SUCCESS if successful else appropriate error
***************************************************************************/
int
SendReply( IN struct sockaddr *DestAddr,
           IN char *DevType,
           IN int RootDev,
           IN char *Udn,
           IN char *Location,
           IN int Duration,
           IN int ByType )
{
    int ret_code;
    char *msgs[2];
    int num_msgs;
    char Mil_Usn[LINE_SIZE];
    int i;

    msgs[0] = NULL;
    msgs[1] = NULL;

    if( RootDev ) {
        // one msg for root device
        num_msgs = 1;

        sprintf( Mil_Usn, "%s::upnp:rootdevice", Udn );
        CreateServicePacket( MSGTYPE_REPLY, "upnp:rootdevice",
            Mil_Usn, Location, Duration, &msgs[0], DestAddr->sa_family );
    } else {
        // two msgs for embedded devices
        num_msgs = 1;

        //NK: FIX for extra response when someone searches by udn
        if( !ByType ) {
            CreateServicePacket( MSGTYPE_REPLY, Udn, Udn, Location,
                Duration, &msgs[0], DestAddr->sa_family );
        } else {
            sprintf( Mil_Usn, "%s::%s", Udn, DevType );
            CreateServicePacket( MSGTYPE_REPLY, DevType, Mil_Usn,
                Location, Duration, &msgs[0], DestAddr->sa_family );
        }
    }

    // check error
    for( i = 0; i < num_msgs; i++ ) {
        if( msgs[i] == NULL ) {
            free( msgs[0] );
            return UPNP_E_OUTOF_MEMORY;
        }
    }

    // send msgs
    ret_code = NewRequestHandler( DestAddr, num_msgs, msgs );
    for( i = 0; i < num_msgs; i++ ) {
        if( msgs[i] != NULL )
            free( msgs[i] );
    }

    return ret_code;
}

/************************************************************************
* Function : DeviceReply
*
* Parameters:
*     IN struct sockaddr *DestAddr:destination IP address.
*     IN char *DevType: Device type
*     IN int RootDev: 1 means root device 0 means embedded device.
*     IN char * Udn: Device UDN
*     IN char * Location: Location of Device description document.
*     IN int  Duration :Life time of this device.
* Description:
*     This function creates the reply packet based on the input parameter, 
*     and send it to the client address given in its input parameter DestAddr.
*
* Returns: int
*     UPNP_E_SUCCESS if successful else appropriate error
***************************************************************************/
int
DeviceReply( IN struct sockaddr *DestAddr,
             IN char *DevType,
             IN int RootDev,
             IN char *Udn,
             IN char *Location,
             IN int Duration)
{
    char *szReq[3],
      Mil_Nt[LINE_SIZE],
      Mil_Usn[LINE_SIZE];
    int RetVal;

    szReq[0] = NULL;
    szReq[1] = NULL;
    szReq[2] = NULL;

    // create 2 or 3 msgs

    if( RootDev ) {
        // 3 replies for root device
        strcpy( Mil_Nt, "upnp:rootdevice" );
        sprintf( Mil_Usn, "%s::upnp:rootdevice", Udn );
        CreateServicePacket( MSGTYPE_REPLY, Mil_Nt, Mil_Usn,
            Location, Duration, &szReq[0], DestAddr->sa_family );
    }

    sprintf( Mil_Nt, "%s", Udn );
    sprintf( Mil_Usn, "%s", Udn );
    CreateServicePacket( MSGTYPE_REPLY, Mil_Nt, Mil_Usn,
        Location, Duration, &szReq[1], DestAddr->sa_family );

    sprintf( Mil_Nt, "%s", DevType );
    sprintf( Mil_Usn, "%s::%s", Udn, DevType );
    CreateServicePacket( MSGTYPE_REPLY, Mil_Nt, Mil_Usn,
        Location, Duration, &szReq[2], DestAddr->sa_family );

    // check error

    if( ( RootDev && szReq[0] == NULL ) ||
        szReq[1] == NULL || szReq[2] == NULL ) {
        free( szReq[0] );
        free( szReq[1] );
        free( szReq[2] );
        return UPNP_E_OUTOF_MEMORY;
    }
    // send replies
    if( RootDev ) {
        RetVal = NewRequestHandler( DestAddr, 3, szReq );
    } else {
        RetVal = NewRequestHandler( DestAddr, 2, &szReq[1] );
    }

    // free
    free( szReq[0] );
    free( szReq[1] );
    free( szReq[2] );

    return RetVal;
}

/************************************************************************
* Function : ServiceAdvertisement
*
* Parameters:
*     IN char * Udn: Device UDN
*     IN char *ServType: Service Type.
*     IN char * Location: Location of Device description document.
*     IN int  Duration :Life time of this device.
*     IN int AddressFamily: Device address family
* Description:
*     This function creates the advertisement packet based
*     on the input parameter, and send it to the multicast channel.
*
* Returns: int
*     UPNP_E_SUCCESS if successful else appropriate error
***************************************************************************/
int
ServiceAdvertisement( IN char *Udn,
                      IN char *ServType,
                      IN char *Location,
                      IN int Duration,
                      IN int AddressFamily)
{
    char Mil_Usn[LINE_SIZE];
    char *szReq[1];
    int RetVal;
    struct sockaddr_storage __ss;
    struct sockaddr_in* DestAddr4 = (struct sockaddr_in*)&__ss;
    struct sockaddr_in6* DestAddr6 = (struct sockaddr_in6*)&__ss;

    memset( &__ss, 0, sizeof(__ss) );
    if( AddressFamily == AF_INET ) {
        DestAddr4->sin_family = AF_INET;
        inet_pton( AF_INET, SSDP_IP, &DestAddr4->sin_addr );
        DestAddr4->sin_port = htons( SSDP_PORT );
    } else if( AddressFamily == AF_INET6 ) {
        DestAddr6->sin6_family = AF_INET6;
        inet_pton( AF_INET6, SSDP_IPV6_LINKLOCAL, &DestAddr6->sin6_addr );
        DestAddr6->sin6_port = htons( SSDP_PORT );
        DestAddr6->sin6_scope_id = gIF_INDEX;
    } else {
        UpnpPrintf( UPNP_CRITICAL, SSDP, __FILE__, __LINE__,
            "Invalid device address family.\n" );
    }

    sprintf( Mil_Usn, "%s::%s", Udn, ServType );

    //CreateServiceRequestPacket(1,szReq[0],Mil_Nt,Mil_Usn,
    //Server,Location,Duration);
    CreateServicePacket( MSGTYPE_ADVERTISEMENT, ServType, Mil_Usn,
                         Location, Duration, &szReq[0], AddressFamily );
    if( szReq[0] == NULL ) {
        return UPNP_E_OUTOF_MEMORY;
    }

    RetVal = NewRequestHandler( (struct sockaddr*)&__ss, 1, szReq );

    free( szReq[0] );
    return RetVal;
}

/************************************************************************
* Function : ServiceReply
*
* Parameters:
*     IN struct sockaddr *DestAddr:
*     IN char * Udn: Device UDN
*     IN char *ServType: Service Type.
*     IN char * Location: Location of Device description document.
*     IN int  Duration :Life time of this device.
* Description:
*     This function creates the advertisement packet based 
*     on the input parameter, and send it to the multicast channel.
*
* Returns: int
*     UPNP_E_SUCCESS if successful else appropriate error
***************************************************************************/
int
ServiceReply( IN struct sockaddr *DestAddr,
              IN char *ServType,
              IN char *Udn,
              IN char *Location,
              IN int Duration )
{
    char Mil_Usn[LINE_SIZE];
    char *szReq[1];
    int RetVal;

    szReq[0] = NULL;

    sprintf( Mil_Usn, "%s::%s", Udn, ServType );

    CreateServicePacket( MSGTYPE_REPLY, ServType, Mil_Usn,
        Location, Duration, &szReq[0], DestAddr->sa_family );
    if( szReq[0] == NULL ) {
        return UPNP_E_OUTOF_MEMORY;
    }

    RetVal = NewRequestHandler( DestAddr, 1, szReq );

    free( szReq[0] );
    return RetVal;
}

/************************************************************************
* Function : ServiceShutdown
*
* Parameters:
*     IN char * Udn: Device UDN
*     IN char *ServType: Service Type.
*     IN char * Location: Location of Device description document.
*     IN int  Duration :Service duration in sec.
*     IN int AddressFamily: Device address family
* Description:
*     This function creates a HTTP service shutdown request packet 
*     and sent it to the multicast channel through RequestHandler.
*
* Returns: int
*     UPNP_E_SUCCESS if successful else appropriate error
***************************************************************************/
int
ServiceShutdown( IN char *Udn,
                 IN char *ServType,
                 IN char *Location,
                 IN int Duration,
                 IN int AddressFamily)
{
    char Mil_Usn[LINE_SIZE];
    char *szReq[1];
    struct sockaddr_storage __ss;
    struct sockaddr_in* DestAddr4 = (struct sockaddr_in*)&__ss;
    struct sockaddr_in6* DestAddr6 = (struct sockaddr_in6*)&__ss;
    int RetVal;

    memset( &__ss, 0, sizeof(__ss) );
    if( AddressFamily == AF_INET ) {
        DestAddr4->sin_family = AF_INET;
        inet_pton( AF_INET, SSDP_IP, &DestAddr4->sin_addr );
        DestAddr4->sin_port = htons( SSDP_PORT );
    } else if( AddressFamily == AF_INET6 ) {
        DestAddr6->sin6_family = AF_INET6;
        inet_pton( AF_INET6, SSDP_IPV6_LINKLOCAL, &DestAddr6->sin6_addr );
        DestAddr6->sin6_port = htons( SSDP_PORT );
        DestAddr6->sin6_scope_id = gIF_INDEX;
    } else {
        UpnpPrintf( UPNP_CRITICAL, SSDP, __FILE__, __LINE__,
            "Invalid device address family.\n" );
    }

    //sprintf(Mil_Nt,"%s",ServType);
    sprintf( Mil_Usn, "%s::%s", Udn, ServType );
    //CreateServiceRequestPacket(0,szReq[0],Mil_Nt,Mil_Usn,
    //Server,Location,Duration);
    CreateServicePacket( MSGTYPE_SHUTDOWN, ServType, Mil_Usn,
                         Location, Duration, &szReq[0], AddressFamily );
    if( szReq[0] == NULL ) {
        return UPNP_E_OUTOF_MEMORY;
    }
    RetVal = NewRequestHandler( (struct sockaddr*)&__ss, 1, szReq );

    free( szReq[0] );
    return RetVal;
}

/************************************************************************
* Function : DeviceShutdown
*
* Parameters:
*     IN char *DevType: Device Type.
*     IN int RootDev:1 means root device.
*     IN char * Udn: Device UDN
*     IN char * Location: Location URL
*     IN int  Duration :Device duration in sec.
*     IN int AddressFamily: Device address family.
*
* Description:
*     This function creates a HTTP device shutdown request packet 
*     and sent it to the multicast channel through RequestHandler.
*
* Returns: int
*     UPNP_E_SUCCESS if successful else appropriate error
***************************************************************************/
int
DeviceShutdown( IN char *DevType,
                IN int RootDev,
                IN char *Udn,
                IN char *_Server,
                IN char *Location,
                IN int Duration, 
                IN int AddressFamily)
{
    struct sockaddr_storage __ss;
    struct sockaddr_in* DestAddr4 = (struct sockaddr_in*)&__ss;
    struct sockaddr_in6* DestAddr6 = (struct sockaddr_in6*)&__ss;
    char *msgs[3];
    char Mil_Usn[LINE_SIZE];
    int ret_code;

    msgs[0] = NULL;
    msgs[1] = NULL;
    msgs[2] = NULL;

    memset( &__ss, 0, sizeof(__ss) );
    if( AddressFamily == AF_INET ) {
        DestAddr4->sin_family = AF_INET;
        inet_pton( AF_INET, SSDP_IP, &DestAddr4->sin_addr );
        DestAddr4->sin_port = htons( SSDP_PORT );
    } else if( AddressFamily == AF_INET6 ) {
        DestAddr6->sin6_family = AF_INET6;
        inet_pton( AF_INET6, SSDP_IPV6_LINKLOCAL, &DestAddr6->sin6_addr );
        DestAddr6->sin6_port = htons( SSDP_PORT );
        DestAddr6->sin6_scope_id = gIF_INDEX;
    } else {
        UpnpPrintf( UPNP_CRITICAL, SSDP, __FILE__, __LINE__,
            "Invalid device address family.\n" );
    }

    // root device has one extra msg
    if( RootDev ) {
        sprintf( Mil_Usn, "%s::upnp:rootdevice", Udn );
        CreateServicePacket( MSGTYPE_SHUTDOWN, "upnp:rootdevice",
            Mil_Usn, Location, Duration, &msgs[0], AddressFamily );
    }

    UpnpPrintf( UPNP_INFO, SSDP, __FILE__, __LINE__,
        "In function DeviceShutdown\n" );
    // both root and sub-devices need to send these two messages
    CreateServicePacket( MSGTYPE_SHUTDOWN, Udn, Udn,
                         Location, Duration, &msgs[1], AddressFamily );

    sprintf( Mil_Usn, "%s::%s", Udn, DevType );
    CreateServicePacket( MSGTYPE_SHUTDOWN, DevType, Mil_Usn,
                         Location, Duration, &msgs[2], AddressFamily );

    // check error
    if( ( RootDev && msgs[0] == NULL ) ||
        msgs[1] == NULL || msgs[2] == NULL ) {
        free( msgs[0] );
        free( msgs[1] );
        free( msgs[2] );
        return UPNP_E_OUTOF_MEMORY;
    }
    // send packets
    if( RootDev ) {
        // send 3 msg types
        ret_code = NewRequestHandler( (struct sockaddr*)&__ss, 3, &msgs[0] );
    } else                      // sub-device
    {
        // send 2 msg types
        ret_code = NewRequestHandler( (struct sockaddr*)&__ss, 2, &msgs[1] );
    }

    // free msgs
    free( msgs[0] );
    free( msgs[1] );
    free( msgs[2] );

    return ret_code;
}

#endif // EXCLUDE_SSDP
#endif // INCLUDE_DEVICE_APIS


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