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haproxy/include/proto/dns.h

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MEDIUM: dns: implement a DNS resolver Implementation of a DNS client in HAProxy to perform name resolution to IP addresses. It relies on the freshly created UDP client to perform the DNS resolution. For now, all UDP socket calls are performed in the DNS layer, but this might change later when the protocols are extended to be more suited to datagram mode. A new section called 'resolvers' is introduced thanks to this patch. It is used to describe DNS servers IP address and also many parameters.
2015-04-13 21:40:55 +00:00
/*
* include/proto/dns.h
* This file provides functions related to DNS protocol
*
* Copyright (C) 2014 Baptiste Assmann <bedis9@gmail.com>
*
* This library 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, version 2.1
* exclusively.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _PROTO_DNS_H
#define _PROTO_DNS_H
#include <types/dns.h>
#include <types/proto_udp.h>
CLEANUP/MINOR: dns: dns_str_to_dn_label() only needs a const char The string is an input, let's constify it.
2015-07-22 14:42:43 +00:00
char *dns_str_to_dn_label(const char *string, char *dn, int dn_len);
MEDIUM: dns: implement a DNS resolver Implementation of a DNS client in HAProxy to perform name resolution to IP addresses. It relies on the freshly created UDP client to perform the DNS resolution. For now, all UDP socket calls are performed in the DNS layer, but this might change later when the protocols are extended to be more suited to datagram mode. A new section called 'resolvers' is introduced thanks to this patch. It is used to describe DNS servers IP address and also many parameters.
2015-04-13 21:40:55 +00:00
int dns_str_to_dn_label_len(const char *string);
int dns_hostname_validation(const char *string, char **err);
int dns_build_query(int query_id, int query_type, char *hostname_dn, int hostname_dn_len, char *buf, int bufsize);
struct task *dns_process_resolve(struct task *t);
int dns_init_resolvers(void);
uint16_t dns_rnd16(void);
MEDIUM: dns: new DNS response parser New DNS response parser function which turn the DNS response from a network buffer into a DNS structure, much easier for later analysis by upper layer. Memory is pre-allocated at start-up in a chunk dedicated to DNS response store. New error code to report a wrong number of queries in a DNS response.
2016-05-14 09:26:22 +00:00
int dns_validate_dns_response(unsigned char *resp, unsigned char *bufend, struct dns_response_packet *dns_p);
int dns_get_ip_from_response(struct dns_response_packet *dns_p,
MEDIUM: dns: extract options DNS selection preferences are actually declared inline in the struct server. There are copied from the server struct to the dns_resolution struct for each resolution. Next patchs adds new preferences options, and it is not a good way to copy all the configuration information before each dns resolution. This patch extract the configuration preference from the struct server and declares a new dedicated struct. Only a pointer to this new striuict will be copied before each dns resolution.
2016-02-17 20:25:09 +00:00
struct dns_resolution *resol, void *currentip,
short currentip_sin_family,
MEDIUM: dns: implement a DNS resolver Implementation of a DNS client in HAProxy to perform name resolution to IP addresses. It relies on the freshly created UDP client to perform the DNS resolution. For now, all UDP socket calls are performed in the DNS layer, but this might change later when the protocols are extended to be more suited to datagram mode. A new section called 'resolvers' is introduced thanks to this patch. It is used to describe DNS servers IP address and also many parameters.
2015-04-13 21:40:55 +00:00
void **newip, short *newip_sin_family);
void dns_resolve_send(struct dgram_conn *dgram);
void dns_resolve_recv(struct dgram_conn *dgram);
int dns_send_query(struct dns_resolution *resolution);
void dns_print_current_resolutions(struct dns_resolvers *resolvers);
void dns_update_resolvers_timeout(struct dns_resolvers *resolvers);
void dns_reset_resolution(struct dns_resolution *resolution);
int dns_check_resolution_queue(struct dns_resolvers *resolvers);
MINOR: fix the return type for dns_response_get_query_id() function This function should return a 16-bit type as that is the type for dns header id. Also because it is doing an uint16 unpack big-endian operation. Backport: can be backported to 1.6 Signed-off-by: Thiago Farina <tfarina@chromium.org> Signed-off-by: Baptiste Assmann <bedis9@gmail.com>
2016-01-20 22:46:34 +00:00
unsigned short dns_response_get_query_id(unsigned char *resp);
MEDIUM: dns: implement a DNS resolver Implementation of a DNS client in HAProxy to perform name resolution to IP addresses. It relies on the freshly created UDP client to perform the DNS resolution. For now, all UDP socket calls are performed in the DNS layer, but this might change later when the protocols are extended to be more suited to datagram mode. A new section called 'resolvers' is introduced thanks to this patch. It is used to describe DNS servers IP address and also many parameters.
2015-04-13 21:40:55 +00:00
#endif // _PROTO_DNS_H