135#ifndef EVENT2_DNS_H_INCLUDED_ 
  136#define EVENT2_DNS_H_INCLUDED_ 
  138#include <event2/visibility.h> 
  148#define DNS_ERR_NONE 0 
  150#define DNS_ERR_FORMAT 1 
  153#define DNS_ERR_SERVERFAILED 2 
  155#define DNS_ERR_NOTEXIST 3 
  157#define DNS_ERR_NOTIMPL 4 
  160#define DNS_ERR_REFUSED 5 
  162#define DNS_ERR_TRUNCATED 65 
  164#define DNS_ERR_UNKNOWN 66 
  166#define DNS_ERR_TIMEOUT 67 
  168#define DNS_ERR_SHUTDOWN 68 
  170#define DNS_ERR_CANCEL 69 
  174#define DNS_ERR_NODATA 70 
  178#define DNS_IPv6_AAAA 3 
  180#define DNS_QUERY_NO_SEARCH 1 
  183#define DNS_OPTION_SEARCH 1 
  185#define DNS_OPTION_NAMESERVERS 2 
  195#define DNS_OPTION_MISC 4 
  197#define DNS_OPTION_HOSTSFILE 8 
  205#define DNS_OPTIONS_ALL (    \ 
  206    DNS_OPTION_SEARCH      | \ 
  207    DNS_OPTION_NAMESERVERS | \ 
  209    DNS_OPTION_HOSTSFILE   | \ 
  214#define DNS_OPTION_NAMESERVERS_NO_DEFAULT 16 
  217#define DNS_NO_SEARCH DNS_QUERY_NO_SEARCH 
  229typedef void (*
evdns_callback_type) (
int result, 
char type, 
int count, 
int ttl, 
void *addresses, 
void *arg);
 
  235#define EVDNS_BASE_INITIALIZE_NAMESERVERS 1 
  238#define EVDNS_BASE_DISABLE_WHEN_INACTIVE 0x8000 
  242#define EVDNS_BASE_NAMESERVERS_NO_DEFAULT 0x10000 
  308    unsigned long int address);
 
  370    const char *ip_as_string);
 
  378    const struct sockaddr *sa, ev_socklen_t len, 
unsigned flags);
 
  514#if defined(EVENT_IN_DOXYGEN_) || defined(_WIN32) 
  527#define EVDNS_BASE_CONFIG_WINDOWS_NAMESERVERS_IMPLEMENTED 
  606struct evdns_server_request;
 
  607struct evdns_server_question;
 
  621#define EVDNS_ANSWER_SECTION 0 
  622#define EVDNS_AUTHORITY_SECTION 1 
  623#define EVDNS_ADDITIONAL_SECTION 2 
  625#define EVDNS_TYPE_A       1 
  626#define EVDNS_TYPE_NS      2 
  627#define EVDNS_TYPE_CNAME   5 
  628#define EVDNS_TYPE_SOA     6 
  629#define EVDNS_TYPE_PTR    12 
  630#define EVDNS_TYPE_MX     15 
  631#define EVDNS_TYPE_TXT    16 
  632#define EVDNS_TYPE_AAAA   28 
  634#define EVDNS_QTYPE_AXFR 252 
  635#define EVDNS_QTYPE_ALL  255 
  637#define EVDNS_CLASS_INET   1 
  640#define EVDNS_FLAGS_AA  0x400 
  641#define EVDNS_FLAGS_RD  0x080 
  669int evdns_server_request_add_reply(
struct evdns_server_request *req, 
int section, 
const char *name, 
int type, 
int dns_class, 
int ttl, 
int datalen, 
int is_name, 
const char *data);
 
  671int evdns_server_request_add_a_reply(
struct evdns_server_request *req, 
const char *name, 
int n, 
const void *addrs, 
int ttl);
 
  673int evdns_server_request_add_aaaa_reply(
struct evdns_server_request *req, 
const char *name, 
int n, 
const void *addrs, 
int ttl);
 
  675int evdns_server_request_add_ptr_reply(
struct evdns_server_request *req, 
struct in_addr *in, 
const char *inaddr_name, 
const char *hostname, 
int ttl);
 
  677int evdns_server_request_add_cname_reply(
struct evdns_server_request *req, 
const char *name, 
const char *cname, 
int ttl);
 
  700struct evdns_getaddrinfo_request;
 
  720    struct evdns_base *dns_base,
 
  721    const char *nodename, 
const char *servname,
 
  729void evdns_getaddrinfo_cancel(
struct evdns_getaddrinfo_request *req);
 
  745    struct sockaddr *sa, ev_socklen_t len);
 
void(* evdns_request_callback_fn_type)(struct evdns_server_request *, void *)
A callback to implement a DNS server.
Definition: dns.h:620
EVENT2_EXPORT_SYMBOL void evdns_cancel_request(struct evdns_base *base, struct evdns_request *req)
Cancels a pending DNS resolution request.
EVENT2_EXPORT_SYMBOL int evdns_server_request_get_requesting_addr(struct evdns_server_request *req, struct sockaddr *sa, int addr_len)
Get the address that made a DNS request.
EVENT2_EXPORT_SYMBOL int evdns_base_nameserver_ip_add(struct evdns_base *base, const char *ip_as_string)
Add a nameserver by string address.
void(* evdns_getaddrinfo_cb)(int result, struct evutil_addrinfo *res, void *arg)
Callback for evdns_getaddrinfo.
Definition: dns.h:697
EVENT2_EXPORT_SYMBOL struct evdns_request * evdns_base_resolve_reverse_ipv6(struct evdns_base *base, const struct in6_addr *in, int flags, evdns_callback_type callback, void *ptr)
Lookup a PTR record for a given IPv6 address.
EVENT2_EXPORT_SYMBOL int evdns_server_request_drop(struct evdns_server_request *req)
Free a DNS request without sending back a reply.
EVENT2_EXPORT_SYMBOL int evdns_base_get_nameserver_addr(struct evdns_base *base, int idx, struct sockaddr *sa, ev_socklen_t len)
Retrieve the address of the 'idx'th configured nameserver.
EVENT2_EXPORT_SYMBOL void evdns_base_clear_host_addresses(struct evdns_base *base)
Remove all hosts entries that have been loaded into the event_base via evdns_base_load_hosts or via e...
EVENT2_EXPORT_SYMBOL void evdns_set_transaction_id_fn(ev_uint16_t(*fn)(void))
Set a callback that will be invoked to generate transaction IDs.
EVENT2_EXPORT_SYMBOL struct evdns_request * evdns_base_resolve_reverse(struct evdns_base *base, const struct in_addr *in, int flags, evdns_callback_type callback, void *ptr)
Lookup a PTR record for a given IP address.
EVENT2_EXPORT_SYMBOL int evdns_base_resume(struct evdns_base *base)
Resume normal operation and continue any suspended resolve requests.
void(* evdns_callback_type)(int result, char type, int count, int ttl, void *addresses, void *arg)
The callback that contains the results from a lookup.
Definition: dns.h:229
EVENT2_EXPORT_SYMBOL int evdns_base_load_hosts(struct evdns_base *base, const char *hosts_fname)
Load an /etc/hosts-style file from 'hosts_fname' into 'base'.
EVENT2_EXPORT_SYMBOL int evdns_base_nameserver_add(struct evdns_base *base, unsigned long int address)
Add a nameserver.
EVENT2_EXPORT_SYMBOL int evdns_server_request_respond(struct evdns_server_request *req, int err)
Send back a response to a DNS request, and free the request structure.
EVENT2_EXPORT_SYMBOL const char * evdns_err_to_string(int err)
Convert a DNS error code to a string.
EVENT2_EXPORT_SYMBOL struct evdns_request * evdns_base_resolve_ipv6(struct evdns_base *base, const char *name, int flags, evdns_callback_type callback, void *ptr)
Lookup an AAAA record for a given name.
EVENT2_EXPORT_SYMBOL int evdns_base_count_nameservers(struct evdns_base *base)
Get the number of configured nameservers.
EVENT2_EXPORT_SYMBOL struct evdns_base * evdns_base_new(struct event_base *event_base, int initialize_nameservers)
Initialize the asynchronous DNS library.
EVENT2_EXPORT_SYMBOL int evdns_base_set_option(struct evdns_base *base, const char *option, const char *val)
Set the value of a configuration option.
EVENT2_EXPORT_SYMBOL int evdns_base_resolv_conf_parse(struct evdns_base *base, int flags, const char *const filename)
Parse a resolv.conf file.
EVENT2_EXPORT_SYMBOL void evdns_base_search_add(struct evdns_base *base, const char *domain)
Add a domain to the list of search domains.
EVENT2_EXPORT_SYMBOL void evdns_server_request_set_flags(struct evdns_server_request *req, int flags)
Sets some flags in a reply we're building.
void(* evdns_debug_log_fn_type)(int is_warning, const char *msg)
A callback that is invoked when a log message is generated.
Definition: dns.h:564
EVENT2_EXPORT_SYMBOL void evdns_set_random_bytes_fn(void(*fn)(char *, size_t))
Set a callback used to generate random bytes.
EVENT2_EXPORT_SYMBOL void evdns_base_search_clear(struct evdns_base *base)
Clear the list of search domains.
EVENT2_EXPORT_SYMBOL void evdns_base_free(struct evdns_base *base, int fail_requests)
Shut down the asynchronous DNS resolver and terminate all active requests.
EVENT2_EXPORT_SYMBOL void evdns_close_server_port(struct evdns_server_port *port)
Close down a DNS server port, and free associated structures.
EVENT2_EXPORT_SYMBOL int evdns_base_config_windows_nameservers(struct evdns_base *)
Obtain nameserver information using the Windows API.
EVENT2_EXPORT_SYMBOL int evdns_base_nameserver_sockaddr_add(struct evdns_base *base, const struct sockaddr *sa, ev_socklen_t len, unsigned flags)
Add a nameserver by sockaddr.
EVENT2_EXPORT_SYMBOL struct evdns_request * evdns_base_resolve_ipv4(struct evdns_base *base, const char *name, int flags, evdns_callback_type callback, void *ptr)
Lookup an A record for a given name.
EVENT2_EXPORT_SYMBOL struct evdns_server_port * evdns_add_server_port_with_base(struct event_base *base, evutil_socket_t socket, int flags, evdns_request_callback_fn_type callback, void *user_data)
Create a new DNS server port.
EVENT2_EXPORT_SYMBOL struct evdns_getaddrinfo_request * evdns_getaddrinfo(struct evdns_base *dns_base, const char *nodename, const char *servname, const struct evutil_addrinfo *hints_in, evdns_getaddrinfo_cb cb, void *arg)
Make a non-blocking getaddrinfo request using the dns_base in 'dns_base'.
EVENT2_EXPORT_SYMBOL void evdns_base_search_ndots_set(struct evdns_base *base, const int ndots)
Set the 'ndots' parameter for searches.
EVENT2_EXPORT_SYMBOL void evdns_set_log_fn(evdns_debug_log_fn_type fn)
Set the callback function to handle DNS log messages.
EVENT2_EXPORT_SYMBOL int evdns_base_clear_nameservers_and_suspend(struct evdns_base *base)
Remove all configured nameservers, and suspend all pending resolves.
Structure to hold information and state for a Libevent dispatch loop.
Definition: event.h:219
A definition of struct addrinfo for systems that lack it.
Definition: util.h:679
Common convenience functions for cross-platform portability and related socket manipulations.
#define evutil_socket_t
A type wide enough to hold the output of "socket()" or "accept()".
Definition: util.h:310