Function encode_message

src/msg/Message.cc:1079–1097

// allow for message authentication.  Eventually we should fix that.  PLR

void encode_message(Message *msg, uint64_t features, ceph::bufferlist& payload)
{
  ceph_msg_footer_old old_footer;
  msg->encode(features, MSG_CRC_ALL);
  encode(msg->get_header(), payload);

  // Here's where we switch to the old footer format.  PLR
  ceph_msg_footer footer = msg->get_footer();
  old_footer.front_crc = footer.front_crc;   
  old_footer.middle_crc = footer.middle_crc;   
  old_footer.data_crc = footer.data_crc;   
  old_footer.flags = footer.flags;   
  encode(old_footer, payload);

  using ceph::encode;
  encode(msg->get_payload(), payload);
  encode(msg->get_middle(), payload);
  encode(msg->get_data(), payload);
}

// See above for somewhat bogus use of the old message footer.  We switch to the current footer
// after decoding the old one so the other form of decode_message() doesn't have to change.