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81ed1a0516
A couple of new functions to allocate and free memory for a DNS resolution structure. Main purpose is to to make the code related to DNS more consistent. They allocate or free memory for the structure itself. Later, if needed, they should also allocate / free the buffers, etc, used by this structure. They don't set/unset any parameters, this is the role of the caller. This patch also implement calls to these function eveywhere it is required.
52 lines
2.3 KiB
C
52 lines
2.3 KiB
C
/*
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* include/proto/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 _PROTO_DNS_H
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#define _PROTO_DNS_H
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#include <types/dns.h>
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#include <types/proto_udp.h>
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char *dns_str_to_dn_label(const char *string, char *dn, int dn_len);
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int dns_str_to_dn_label_len(const char *string);
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int dns_hostname_validation(const char *string, char **err);
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int dns_build_query(int query_id, int query_type, char *hostname_dn, int hostname_dn_len, char *buf, int bufsize);
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struct task *dns_process_resolve(struct task *t);
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int dns_init_resolvers(int close_socket);
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uint16_t dns_rnd16(void);
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int dns_validate_dns_response(unsigned char *resp, unsigned char *bufend, struct dns_response_packet *dns_p);
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int dns_get_ip_from_response(struct dns_response_packet *dns_p,
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struct dns_resolution *resol, void *currentip,
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short currentip_sin_family,
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void **newip, short *newip_sin_family);
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void dns_resolve_send(struct dgram_conn *dgram);
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void dns_resolve_recv(struct dgram_conn *dgram);
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int dns_send_query(struct dns_resolution *resolution);
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void dns_print_current_resolutions(struct dns_resolvers *resolvers);
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void dns_update_resolvers_timeout(struct dns_resolvers *resolvers);
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void dns_reset_resolution(struct dns_resolution *resolution);
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int dns_check_resolution_queue(struct dns_resolvers *resolvers);
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unsigned short dns_response_get_query_id(unsigned char *resp);
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struct dns_resolution *dns_alloc_resolution(void);
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void dns_free_resolution(struct dns_resolution *resolution);
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#endif // _PROTO_DNS_H
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