TDA2EX17EVM: IPv6 UDP sendto function failure on TDA2ex

Hello Gerardo,
Herewith i am sharing two interfaces for creating socket and sending data over sockets. I will be calling create and then write interface.
Return value from sendto is 22. I have verified inet_pton returns success and verified proper port and address are filled in in6_addr structure.


#define SERVER "ff14::1:a"
#define SERVER_PORT 500002


typedef struct Socket_NwkInterface {
    Network_SockObj ntwrkObj;
    struct sockaddr_in6 IPv6serverInfo;
} SocketNetInterface;

inline SocketNetInterface *Get_SocketNetInstance() {

  static SocketNetInterface SocketNetObj;

  return &SocketNetObj;
}

Int32 Network_CreateUDPIPv6() 
{
    Int32 ret       = -1;

#if ( defined(NDK_PROC_TO_USE_IPU1_0) && defined(BUILD_M4_0) ) || \
    ( defined(NDK_PROC_TO_USE_IPU1_1) && defined(BUILD_M4_1) ) || \
    ( defined(NDK_PROC_TO_USE_IPU2)   && defined(BUILD_M4_2) ) || \
    ( defined(NDK_PROC_TO_USE_A15_0)  && defined(BUILD_A15) )

    Int32 slen = 0;
    SocketNetInterface *Obj = Get_SocketNetInstance();
    slen = sizeof(Obj->IPv6serverInfo);
    char str [46];
  
    Network_sessionOpen(NULL);

    if( (Obj->ntwrkObj.sockFd=socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP)) < 0) 
    {
        Vps_printf("socket returned <0");
        ret = NETWORK_ERROR;
    }
   else 
   {
       memset((char *) &Obj->IPv6serverInfo, 0, slen);
       Obj->IPv6serverInfo.sin6_family = AF_INET6;
       Obj->IPv6serverInfo.sin6_port   = htons(SERVER_PORT);
       if(inet_pton(AF_INET6, SERVER ,(struct in_addr *) &Obj->IPv6serverInfo.sin6_addr)  < 0 ){
           Vps_printf("inet_pton failed");
       }; 
       inet_ntop(AF_INET6,&Obj->IPv6serverInfo.sin6_addr, str, 46);
       Vps_printf("%s\n", str);
       ret = 0 ;
    }

#endif
 return ret;
}

Int32 Network_WriteUDPIPv6(char* buf)
{
    Int32 ret =-1;
#if ( defined(NDK_PROC_TO_USE_IPU1_0) && defined(BUILD_M4_0) ) || \
    ( defined(NDK_PROC_TO_USE_IPU1_1) && defined(BUILD_M4_1) ) || \
    ( defined(NDK_PROC_TO_USE_IPU2)   && defined(BUILD_M4_2) ) || \
    ( defined(NDK_PROC_TO_USE_A15_0)  && defined(BUILD_A15) )

    SocketNetInterface*Obj = Get_SocketNetInstance();
    UInt32 slen = sizeof(Obj->IPv6serverInfo);
    fdOpenSession( TaskSelf() );
    ret = sendto(Obj->ntwrkObj.sockFd, buf,  32, 0 , (struct sockaddr *) &Obj->IPv6serverInfo, slen);
    if(ret < 0 ){
    ret = fdError();
    Vps_printf("write UDPIPv6 ret = %d",ret);
    }
    else
      ret = 0;
    return ret;
}

Thanks for any suggestions.