Man page - ares_mkquery(3)
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- ares_set_pending_write_cb(3)
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- ares_parse_txt_reply(3)
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- ares_strerror(3)
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- ares_parse_soa_reply(3)
- ares_dns_datatype_t(3)
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- ares_reinit(3)
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- ares_dns_rcode_tostr(3)
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- ares_dns_rr_set_u16(3)
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- ares_dns_rr_get_bin(3)
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- ares_queue_active_queries(3)
- ares_inet_ntop(3)
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- ares_dns_record_get_rcode(3)
- ares_dns_rr_get_name(3)
- ares_dns_rec_type_fromstr(3)
- ares_free_string(3)
- ares_save_options(3)
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- ares_threadsafety(3)
- ares_parse_srv_reply(3)
- ares_get_servers_csv(3)
- ares_queue_wait_empty(3)
- ares_dns_rr_key_t(3)
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- ares_dns_record_set_id(3)
- ares_dns_opt_get_name(3)
- ares_set_socket_functions(3)
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- ares_send(3)
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- ares_dns_rr_get_str(3)
- ares_dns_rr_get_abin(3)
- ares_set_servers_ports_csv(3)
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- ares_dns_class_t(3)
- ares_dns_mapping(3)
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- ares_free_data(3)
- ares_dns_rr_key_tostr(3)
- ares_dns_rr_get_addr6(3)
- ares_get_servers(3)
- ares_dns_rr_get_keys(3)
- ares_set_servers_ports(3)
- ares_dns_section_tostr(3)
- ares_dns_class_tostr(3)
- ares_dns_record_query_set_name(3)
- ares_search_dnsrec(3)
- ares_cancel(3)
- ares_dns_rr_del_abin(3)
- ares_expand_string(3)
- ares_dns_flags_t(3)
- ares_expand_name(3)
- ares_free_hostent(3)
- ares_dns_opt_datatype_t(3)
- ares_set_servers_csv(3)
- ares_dns_rr_get_ttl(3)
- ares_library_initialized(3)
- ares_get_servers_ports(3)
- ares_timeout(3)
- ares_dns_rr_del_opt_byid(3)
- ares_dns_rr_set_addr(3)
- ares_set_server_state_callback(3)
- ares_dns_rr_get_u8(3)
- ares_dns_section_t(3)
- ares_dns_rr_get_type(3)
- ares_dns_rr_set_addr6(3)
- ares_dns_record_rr_get(3)
- ares_dns_rr_get_opt_byid(3)
- ares_dns_record_create(3)
- ares_gethostbyname(3)
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- ares_dns_record_destroy(3)
- ares_dns_opt_get_datatype(3)
- ares_freeaddrinfo(3)
- ares_dns_record_rr_del(3)
- ares_set_local_dev(3)
- ares_dns_rcode_t(3)
- ares_dns_opcode_tostr(3)
- ares_query_dnsrec(3)
- ares_dns_record_query_add(3)
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- ares_dns_opcode_t(3)
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apt-get install libc-ares-dev
Manual
ARES_MKQUERY
NAMESYNOPSIS
DESCRIPTION
RETURN VALUES
SEE ALSO
NAME
ares_mkquery - Compose a single-question DNS query buffer
SYNOPSIS
#include <ares.h>
int
ares_mkquery(const char *
name
, int
dnsclass
,
int
type
,
unsigned short
id
, int
rd
, unsigned char
**
buf
,
int *
buflen
)
DESCRIPTION
This function is deprecated as of c-ares 1.10, please use ares_dns_record_create(3) instead.
The ares_mkquery function composes a DNS query with a single question. The parameter name gives the query name as a NUL-terminated C string of period-separated labels optionally ending with a period; periods and backslashes within a label must be escaped with a backlash. The parameters dnsclass and type give the class and type of the query using the values defined in <arpa/nameser.h> . The parameter id gives a 16-bit identifier for the query. The parameter rd should be nonzero if recursion is desired, zero if not. The query will be placed in an allocated buffer, a pointer to which will be stored in the variable pointed to by buf , and the length of which will be stored in the variable pointed to by buflen . It is the caller’s responsibility to free this buffer using ares_free_string(3) when it is no longer needed.
Usage of ares_mkquery(3) is deprecated, whereas the function is equivalent to ares_create_query(3) with max_udp_size set to 0.
RETURN VALUES
ares_mkquery can return any of the following values:
|
ARES_SUCCESS |
Construction of the DNS query succeeded. |
||
|
ARES_ENOTFOUND |
The query name name refers to a .onion domain name. See RFC 7686. |
||
|
ARES_EBADNAME |
The query name name could not be encoded as a domain name, either because it contained a zero-length label or because it contained a label of more than 63 characters. |
||
|
ARES_ENOMEM |
Memory was exhausted. |
SEE ALSO
ares_expand_name (3), ares_dns_record (3), ares_free_string (3)