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2f6120d6d4
When we want to avoid keeping pointers on a nameserver struct, it's not always convenient to refer as a nameserver using it's text-based unique identifier since it's not limited in length thus it cannot be serialized and deserialized safely. To address this limitation, we add a new ->puid member in dns_nameserver struct which is a parent-unique numeric value that can be used to refer to the dns nameserver within its parent resolver context. To achieve this, we reused the resolver->nb_nameserver member that wasn't used. Each time we add a new nameserver to a resolver: we set ns->puid to the current number of nameservers within the resolver and we increment this number right away. Public helper function find_nameserver_by_resolvers_and_id() was added to help retrieve nameserver pointer from (resolver X nameserver puid) combination.
67 lines
2.9 KiB
C
67 lines
2.9 KiB
C
/*
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* include/haproxy/dns.h
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* This file provides functions related to DNS protocol
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*
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* Copyright (C) 2014 Baptiste Assmann <bedis9@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _HAPROXY_RESOLVERS_H
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#define _HAPROXY_RESOLVERS_H
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#include <haproxy/resolvers-t.h>
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struct proxy;
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struct server;
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struct stconn;
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struct act_rule;
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struct list;
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extern struct list sec_resolvers;
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extern unsigned int resolv_failed_resolutions;
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struct resolvers *find_resolvers_by_id(const char *id);
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struct dns_nameserver *find_nameserver_by_resolvers_and_id(struct resolvers *parent, unsigned int id);
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struct resolv_srvrq *find_srvrq_by_name(const char *name, struct proxy *px);
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struct resolv_srvrq *new_resolv_srvrq(struct server *srv, char *fqdn);
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struct resolv_answer_item *find_srvrq_answer_record(const struct resolv_requester *requester);
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int resolv_str_to_dn_label(const char *str, int str_len, char *dn, int dn_len);
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int resolv_dn_label_to_str(const char *dn, int dn_len, char *str, int str_len);
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int resolv_hostname_validation(const char *string, char **err);
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int resolv_get_ip_from_response(struct resolv_response *r_res,
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struct resolv_options *resolv_opts, void *currentip,
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short currentip_sin_family,
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void **newip, short *newip_sin_family,
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struct server *owner);
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int resolv_link_resolution(void *requester, int requester_type, int requester_locked);
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void resolv_unlink_resolution(struct resolv_requester *requester);
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void resolv_detach_from_resolution_answer_items(struct resolv_resolution *res, struct resolv_requester *req);
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void resolv_trigger_resolution(struct resolv_requester *requester);
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enum act_parse_ret resolv_parse_do_resolve(const char **args, int *orig_arg, struct proxy *px, struct act_rule *rule, char **err);
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int check_action_do_resolve(struct act_rule *rule, struct proxy *px, char **err);
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int stats_dump_resolvers(struct stconn *sc,
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struct field *stats, size_t stats_count,
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struct list *stat_modules);
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void resolv_stats_clear_counters(int clrall, struct list *stat_modules);
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int resolv_allocate_counters(struct list *stat_modules);
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int resolvers_create_default();
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#endif // _HAPROXY_RESOLVER_H
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