IPv6 Raw socket problem in Linux 7.2

["Hossain, Mohammad" <m_hossain@xxxxxxxxxxxx>]

Hello,
  I believe this is the best place to ask questions on ipv6 raw socket
problem. 
 Problem:
  I am opening am raw ipv6 socket. Then trying to send and receive data
using it. But I get invalid argument(EINVAL) from both sendmsg() 
and recvfrom() system call when trying to send data. Why is this happening? 

     Q: What is wrong in following code? 
     Q: Why the error is Invalid Argument? This same code executes on
Solaris IPv6 machine with little change. 
     Q: Kernel missing some module???? 
          How to know if my machine has raw IPv6 support or raw6 module in
the kernel is installed or not. I see
          raw6 module is there in /proc/net dir.

   Pls help me out.
  Thanks.
  Arif.
  -----------------------oOo--------------------------Code
-----------------------oOo--------------------------

    int enable=1;
  struct sockaddr_in6 srcAddr6;
  size=sizeof(sockaddr_in6);
  .......

  sd=socket(AF_INET6, SOCK_RAW, IPPROTO_RAW); /*ipv6 raw socket*/

  /* set socket options */
  ioctl(sd,(S32)FIONBIO, &enable); /* make socket NonBlocking */
  setsockopt(sd, level, SO_BSDCOMPAT,&enable, sizeof(enable));
  setsockopt(sd, level, SO_REUSEADDR,(char*)&enable,sizeof(enable));

  /* binding */
  cmMemset((U8*)&srcAddr6, 0, sizeof(srcAddr6));
  srcAddr6.sin6_family = AF_INET6;
  srcAddr6.sin6_port = CM_INET_HTON_U16(port);
  COPY_IPV6ADDR(&srcAddr6.sin6_addr,&in6addr_loopback); /*loopback used*/
  sizeOfAddr = sizeof(struct sockaddr_in6);
  sockAddrPtr = (sockAddr *)&srcAddr6;
  bind(sd, sockAddrPtr, sizeOfAddr);

  getsockname(sd, &lclSockAddr, (int*)&size);

sending data:
   struct sockaddr_in6 remAddr6;
   int sizeOfAddr;
   struct msghdr msg;
   char buffer [1][100];
   struct iovec io[1];

   remAddr6.sin6_family = AF_INET6;
   remAddr6.sin6_port   = CM_INET_HTON_U16(12447);
   COPY_IPV6ADDR(&remAddr6.sin6_addr, 
                               &in6addr_loopback); /* macro */
   sizeOfAddr = sizeof(remAddr6);

   cmMemset(&msg, 0, sizeof(msg)); /*fill up msg with all 0*/
   msg.msg_name = (void*)&remAddr6;
   msg.msg_namelen = sizeOfAddr;

   io[0].iov_base = buffer[0];
   sprintf(buffer[0]," This is a test\n");
   io[0].iov_len = strlen(buffer[0]);
   msg.msg_iov = io; 
   msg.msg_iovlen = 1;

   msg.msg_control    = NULL;
   msg.msg_controllen  = 0;
   msg.msg_flags = 0;

   ret = sendmsg(sd, &msg, 0); ===> returns (-1):EINVAL 
                     or 
         recvfrom(.......)     ===> returns (-1): EINVAL too.