diff options
Diffstat (limited to 'src/libknot/rrset.h')
| -rw-r--r-- | src/libknot/rrset.h | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/src/libknot/rrset.h b/src/libknot/rrset.h index fdc5719..51efb74 100644 --- a/src/libknot/rrset.h +++ b/src/libknot/rrset.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2019 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> +/* Copyright (C) 2024 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -185,10 +185,27 @@ bool knot_rrset_is_nsec3rel(const knot_rrset_t *rr); int knot_rrset_rr_to_canonical(knot_rrset_t *rrset); /*! - * \brief Size of rrset in wire format. + * \brief Size of rrset in wire format (without compression). * * \retval size in bytes */ size_t knot_rrset_size(const knot_rrset_t *rrset); +/*! + * \brief Fast estimate of knot_rrset_size(); it can return slightly larger values. + */ +inline static size_t knot_rrset_size_estimate(const knot_rrset_t *rrset) +{ + if (rrset == NULL) { + return 0; + } + + /* 8B = TYPE + CLASS + TTL + RDLENGTH - sizeof(knot_rdata_t::len) + * We over-estimate by the count of padding bytes (<= rrset->rrs.count) */ + size_t estim = rrset->rrs.size + + rrset->rrs.count * (knot_dname_size(rrset->owner) + 8); + + return estim; +} + /*! @} */ |