+ /*
+ * The members below, when not NULL/LBER_DEFAULT/etc, are:
+ * ber_buf Data buffer. Other pointers normally point into it.
+ * ber_rwptr Read/write cursor for Sockbuf I/O.
+ * ber_memctx Context passed to ber_memalloc() & co.
+ * When decoding data (reading it from the BerElement):
+ * ber_end End of BER data.
+ * ber_ptr Read cursor, except for 1st octet of tags.
+ * ber_tag 1st octet of next tag, saved from *ber_ptr when
+ * ber_ptr may be pointing at a tag and is >ber_buf.
+ * The octet *ber_ptr itself may get overwritten with
+ * a \0, to terminate the preceding element.
+ * When encoding data (writing it to the BerElement):
+ * ber_end End of allocated buffer - 1 (allowing a final \0).
+ * ber_ptr Last complete BER element (normally write cursor).
+ * ber_sos_ptr NULL or write cursor for incomplete sequence or set.
+ * ber_sos_inner offset(seq/set length octets) if ber_sos_ptr!=NULL.
+ * ber_tag Default tag for next ber_printf() element.
+ * ber_usertag Boolean set by ber_printf "!" if it sets ber_tag.
+ * ber_len Reused for ber_sos_inner.
+ * When output to a Sockbuf:
+ * ber_ptr End of encoded data to write.
+ * When input from a Sockbuf:
+ * See ber_get_next().
+ */
+
+ /* Do not change the order of these 3 fields! see ber_get_next */