From f2f1f2472c5efc541bd53f51289ad58a86fa2d41 Mon Sep 17 00:00:00 2001 From: Luke Shumaker Date: Sat, 20 May 2017 17:35:06 -0400 Subject: ./tools/notsd-move --- .../include/basic-dns/resolved-dns-answer.h | 148 +++++++++++++++++++++ 1 file changed, 148 insertions(+) create mode 100644 src/grp-resolve/libbasic-dns/include/basic-dns/resolved-dns-answer.h (limited to 'src/grp-resolve/libbasic-dns/include/basic-dns/resolved-dns-answer.h') diff --git a/src/grp-resolve/libbasic-dns/include/basic-dns/resolved-dns-answer.h b/src/grp-resolve/libbasic-dns/include/basic-dns/resolved-dns-answer.h new file mode 100644 index 0000000000..447604d008 --- /dev/null +++ b/src/grp-resolve/libbasic-dns/include/basic-dns/resolved-dns-answer.h @@ -0,0 +1,148 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2014 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see . +***/ + +#include "systemd-basic/macro.h" + +typedef struct DnsAnswer DnsAnswer; +typedef struct DnsAnswerItem DnsAnswerItem; + +#include "resolved-dns-rr.h" + +/* A simple array of resource records. We keep track of the + * originating ifindex for each RR where that makes sense, so that we + * can qualify A and AAAA RRs referring to a local link with the + * right ifindex. + * + * Note that we usually encode the empty DnsAnswer object as a simple NULL. */ + +typedef enum DnsAnswerFlags { + DNS_ANSWER_AUTHENTICATED = 1, /* Item has been authenticated */ + DNS_ANSWER_CACHEABLE = 2, /* Item is subject to caching */ + DNS_ANSWER_SHARED_OWNER = 4, /* For mDNS: RRset may be owner by multiple peers */ +} DnsAnswerFlags; + +struct DnsAnswerItem { + DnsResourceRecord *rr; + int ifindex; + DnsAnswerFlags flags; +}; + +struct DnsAnswer { + unsigned n_ref; + unsigned n_rrs, n_allocated; + DnsAnswerItem items[0]; +}; + +DnsAnswer *dns_answer_new(unsigned n); +DnsAnswer *dns_answer_ref(DnsAnswer *a); +DnsAnswer *dns_answer_unref(DnsAnswer *a); + +int dns_answer_add(DnsAnswer *a, DnsResourceRecord *rr, int ifindex, DnsAnswerFlags flags); +int dns_answer_add_extend(DnsAnswer **a, DnsResourceRecord *rr, int ifindex, DnsAnswerFlags flags); +int dns_answer_add_soa(DnsAnswer *a, const char *name, uint32_t ttl, int ifindex); + +int dns_answer_match_key(DnsAnswer *a, const DnsResourceKey *key, DnsAnswerFlags *combined_flags); +int dns_answer_contains_rr(DnsAnswer *a, DnsResourceRecord *rr, DnsAnswerFlags *combined_flags); +int dns_answer_contains_key(DnsAnswer *a, const DnsResourceKey *key, DnsAnswerFlags *combined_flags); +int dns_answer_contains_nsec_or_nsec3(DnsAnswer *a); +int dns_answer_contains_zone_nsec3(DnsAnswer *answer, const char *zone); + +int dns_answer_find_soa(DnsAnswer *a, const DnsResourceKey *key, DnsResourceRecord **ret, DnsAnswerFlags *flags); +int dns_answer_find_cname_or_dname(DnsAnswer *a, const DnsResourceKey *key, DnsResourceRecord **ret, DnsAnswerFlags *flags); + +int dns_answer_merge(DnsAnswer *a, DnsAnswer *b, DnsAnswer **ret); +int dns_answer_extend(DnsAnswer **a, DnsAnswer *b); + +void dns_answer_order_by_scope(DnsAnswer *a, bool prefer_link_local); + +int dns_answer_reserve(DnsAnswer **a, unsigned n_free); +int dns_answer_reserve_or_clone(DnsAnswer **a, unsigned n_free); + +int dns_answer_remove_by_key(DnsAnswer **a, const DnsResourceKey *key); +int dns_answer_remove_by_rr(DnsAnswer **a, DnsResourceRecord *rr); + +int dns_answer_copy_by_key(DnsAnswer **a, DnsAnswer *source, const DnsResourceKey *key, DnsAnswerFlags or_flags); +int dns_answer_move_by_key(DnsAnswer **to, DnsAnswer **from, const DnsResourceKey *key, DnsAnswerFlags or_flags); + +bool dns_answer_has_dname_for_cname(DnsAnswer *a, DnsResourceRecord *cname); + +static inline unsigned dns_answer_size(DnsAnswer *a) { + return a ? a->n_rrs : 0; +} + +static inline bool dns_answer_isempty(DnsAnswer *a) { + return dns_answer_size(a) <= 0; +} + +void dns_answer_dump(DnsAnswer *answer, FILE *f); + +DEFINE_TRIVIAL_CLEANUP_FUNC(DnsAnswer*, dns_answer_unref); + +#define _DNS_ANSWER_FOREACH(q, kk, a) \ + for (unsigned UNIQ_T(i, q) = ({ \ + (kk) = ((a) && (a)->n_rrs > 0) ? (a)->items[0].rr : NULL; \ + 0; \ + }); \ + (a) && (UNIQ_T(i, q) < (a)->n_rrs); \ + UNIQ_T(i, q)++, (kk) = (UNIQ_T(i, q) < (a)->n_rrs ? (a)->items[UNIQ_T(i, q)].rr : NULL)) + +#define DNS_ANSWER_FOREACH(kk, a) _DNS_ANSWER_FOREACH(UNIQ, kk, a) + +#define _DNS_ANSWER_FOREACH_IFINDEX(q, kk, ifi, a) \ + for (unsigned UNIQ_T(i, q) = ({ \ + (kk) = ((a) && (a)->n_rrs > 0) ? (a)->items[0].rr : NULL; \ + (ifi) = ((a) && (a)->n_rrs > 0) ? (a)->items[0].ifindex : 0; \ + 0; \ + }); \ + (a) && (UNIQ_T(i, q) < (a)->n_rrs); \ + UNIQ_T(i, q)++, \ + (kk) = ((UNIQ_T(i, q) < (a)->n_rrs) ? (a)->items[UNIQ_T(i, q)].rr : NULL), \ + (ifi) = ((UNIQ_T(i, q) < (a)->n_rrs) ? (a)->items[UNIQ_T(i, q)].ifindex : 0)) + +#define DNS_ANSWER_FOREACH_IFINDEX(kk, ifindex, a) _DNS_ANSWER_FOREACH_IFINDEX(UNIQ, kk, ifindex, a) + +#define _DNS_ANSWER_FOREACH_FLAGS(q, kk, fl, a) \ + for (unsigned UNIQ_T(i, q) = ({ \ + (kk) = ((a) && (a)->n_rrs > 0) ? (a)->items[0].rr : NULL; \ + (fl) = ((a) && (a)->n_rrs > 0) ? (a)->items[0].flags : 0; \ + 0; \ + }); \ + (a) && (UNIQ_T(i, q) < (a)->n_rrs); \ + UNIQ_T(i, q)++, \ + (kk) = ((UNIQ_T(i, q) < (a)->n_rrs) ? (a)->items[UNIQ_T(i, q)].rr : NULL), \ + (fl) = ((UNIQ_T(i, q) < (a)->n_rrs) ? (a)->items[UNIQ_T(i, q)].flags : 0)) + +#define DNS_ANSWER_FOREACH_FLAGS(kk, flags, a) _DNS_ANSWER_FOREACH_FLAGS(UNIQ, kk, flags, a) + +#define _DNS_ANSWER_FOREACH_FULL(q, kk, ifi, fl, a) \ + for (unsigned UNIQ_T(i, q) = ({ \ + (kk) = ((a) && (a)->n_rrs > 0) ? (a)->items[0].rr : NULL; \ + (ifi) = ((a) && (a)->n_rrs > 0) ? (a)->items[0].ifindex : 0; \ + (fl) = ((a) && (a)->n_rrs > 0) ? (a)->items[0].flags : 0; \ + 0; \ + }); \ + (a) && (UNIQ_T(i, q) < (a)->n_rrs); \ + UNIQ_T(i, q)++, \ + (kk) = ((UNIQ_T(i, q) < (a)->n_rrs) ? (a)->items[UNIQ_T(i, q)].rr : NULL), \ + (ifi) = ((UNIQ_T(i, q) < (a)->n_rrs) ? (a)->items[UNIQ_T(i, q)].ifindex : 0), \ + (fl) = ((UNIQ_T(i, q) < (a)->n_rrs) ? (a)->items[UNIQ_T(i, q)].flags : 0)) + +#define DNS_ANSWER_FOREACH_FULL(kk, ifindex, flags, a) _DNS_ANSWER_FOREACH_FULL(UNIQ, kk, ifindex, flags, a) -- cgit v1.2.3-54-g00ecf