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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def extract_frames(self, bpf_buffer):
 """Extract all frames from the buffer and stored them in the received list."""
  # noqa: E501

        # Ensure that the BPF buffer contains at least the header
        len_bb = len(bpf_buffer)
        if len_bb < 20:  # Note: 20 == sizeof(struct bfp_hdr)
            return

        # Extract useful information from the BPF header
        if FREEBSD or NETBSD:
            # struct bpf_xhdr or struct bpf_hdr32
            bh_tstamp_offset = 16
        else:
            # struct bpf_hdr
            bh_tstamp_offset = 8

        # Parse the BPF header
        bh_caplen = struct.unpack('I', bpf_buffer[bh_tstamp_offset:bh_tstamp_offset + 4])[0]  # noqa: E501
        next_offset = bh_tstamp_offset + 4
        bh_datalen = struct.unpack('I', bpf_buffer[next_offset:next_offset + 4])[0]  # noqa: E501
        next_offset += 4
        bh_hdrlen = struct.unpack('H', bpf_buffer[next_offset:next_offset + 2])[0]  # noqa: E501
        if bh_datalen == 0:
            return

        # Get and store the Scapy object
        frame_str = bpf_buffer[bh_hdrlen:bh_hdrlen + bh_caplen]
        try:
            pkt = self.guessed_cls(frame_str)
        except Exception:
            if conf.debug_dissector:
                raise
            pkt = conf.raw_layer(frame_str)
        self.received_frames.append(pkt)

        # Extract the next frame
        end = self.bpf_align(bh_hdrlen, bh_caplen)
        if (len_bb - end) >= 20:
            self.extract_frames(bpf_buffer[end:])