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7867f63313
Try to create a "default" resolvers section at startup, but does not display any error nor warning. This section is initialized using the /etc/resolv.conf of the system. This is opportunistic and with no guarantee that it will work (but it should on most systems). This is useful for the httpclient as it allows to use the DNS resolver without any configuration in most of the cases. The function is called from the httpclient_pre_check() function to ensure than we tried to create the section before trying to initiate the httpclient. But it is also called from the resolvers.c to ensure the section is created when the httpclient init was disabled.
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 conn_stream;
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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 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 conn_stream *cs,
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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 dns_dgram_init(struct dns_nameserver *ns, struct sockaddr_storage *sk);
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int resolvers_create_default();
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#endif // _HAPROXY_RESOLVER_H
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