eap_msg_alloc() function

: Message Code (EAP_CODE_*) @identifier: Identifier Returns: Pointer to the allocated message buffer or %NULL on error This function can be used to allocate a buffer for an EAP message and fill in the EAP header. This function is automatically using expanded EAP header if the selected Vendor-Id is not IETF. In other words, most EAP methods do not need to separately select which header type to use when using this function to allocate the message buffers. The returned buffer has room for payload_len bytes and has the EAP header and Type field already filled in.