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/* This file is part of Mailfromd.
Copyright (C) 2005-2008, 2010-2011, 2015-2017 Sergey Poznyakoff
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
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef __mfd_dns_h
#define __mfd_dns_h
#define NELEMS(a) (sizeof(a) / sizeof((a)[0]))
typedef enum {
dns_success,
dns_not_found,
dns_failure,
dns_temp_failure,
} dns_status;
typedef enum {
dns_reply_ip,
dns_reply_str
} dns_reply_type;
struct dns_reply {
dns_reply_type type;
int count;
size_t maxcount;
union {
char **str;
GACOPYZ_UINT32_T *ip;
void *ptr;
} data;
};
void dnsbase_real_init(char *configtext);
void dnsbase_file_init(char *file);
void dns_reply_init(struct dns_reply *reply, dns_reply_type type, size_t count);
void dns_reply_free(struct dns_reply *r);
int dns_str_is_ipv4(const char *addr);
int dns_reverse_ipstr(const char *ipstr, char *revipstr);
dns_status dns_resolve_ipstr(const char *ipstr, const char *domain,
char **hbuf);
dns_status dns_resolve_hostname(const char *host, char **ipbuf);
dns_status soa_check(const char *name, int ip, struct dns_reply *repl);
dns_status a_lookup(const char *host, struct dns_reply *repl);
dns_status ptr_lookup(struct in_addr ip, struct dns_reply *repl);
dns_status txt_lookup(const char *name, struct dns_reply *repl);
dns_status ptr_validate(const char *ipstr, struct dns_reply *repl);
dns_status spf_lookup(const char *domain, char **record);
dns_status mx_lookup(const char *host, int resolve, struct dns_reply *repl);
#endif
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