135 #ifndef _EVENT2_DNS_H_ 136 #define _EVENT2_DNS_H_ 146 #define DNS_ERR_NONE 0 148 #define DNS_ERR_FORMAT 1 151 #define DNS_ERR_SERVERFAILED 2 153 #define DNS_ERR_NOTEXIST 3 155 #define DNS_ERR_NOTIMPL 4 158 #define DNS_ERR_REFUSED 5 160 #define DNS_ERR_TRUNCATED 65 162 #define DNS_ERR_UNKNOWN 66 164 #define DNS_ERR_TIMEOUT 67 166 #define DNS_ERR_SHUTDOWN 68 168 #define DNS_ERR_CANCEL 69 172 #define DNS_ERR_NODATA 70 176 #define DNS_IPv6_AAAA 3 178 #define DNS_QUERY_NO_SEARCH 1 180 #define DNS_OPTION_SEARCH 1 181 #define DNS_OPTION_NAMESERVERS 2 182 #define DNS_OPTION_MISC 4 183 #define DNS_OPTION_HOSTSFILE 8 184 #define DNS_OPTIONS_ALL 15 187 #define DNS_NO_SEARCH DNS_QUERY_NO_SEARCH 199 typedef void (*
evdns_callback_type) (
int result,
char type,
int count,
int ttl,
void *addresses,
void *arg);
254 unsigned long int address);
312 const char *ip_as_string);
319 const struct sockaddr *sa, ev_socklen_t len,
unsigned flags);
321 struct evdns_request;
454 int evdns_base_config_windows_nameservers(
struct evdns_base *);
455 #define EVDNS_BASE_CONFIG_WINDOWS_NAMESERVERS_IMPLEMENTED 528 struct evdns_server_request;
529 struct evdns_server_question;
543 #define EVDNS_ANSWER_SECTION 0 544 #define EVDNS_AUTHORITY_SECTION 1 545 #define EVDNS_ADDITIONAL_SECTION 2 547 #define EVDNS_TYPE_A 1 548 #define EVDNS_TYPE_NS 2 549 #define EVDNS_TYPE_CNAME 5 550 #define EVDNS_TYPE_SOA 6 551 #define EVDNS_TYPE_PTR 12 552 #define EVDNS_TYPE_MX 15 553 #define EVDNS_TYPE_TXT 16 554 #define EVDNS_TYPE_AAAA 28 556 #define EVDNS_QTYPE_AXFR 252 557 #define EVDNS_QTYPE_ALL 255 559 #define EVDNS_CLASS_INET 1 562 #define EVDNS_FLAGS_AA 0x400 563 #define EVDNS_FLAGS_RD 0x080 586 int 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);
587 int evdns_server_request_add_a_reply(
struct evdns_server_request *req,
const char *name,
int n,
const void *addrs,
int ttl);
588 int evdns_server_request_add_aaaa_reply(
struct evdns_server_request *req,
const char *name,
int n,
const void *addrs,
int ttl);
589 int evdns_server_request_add_ptr_reply(
struct evdns_server_request *req,
struct in_addr *in,
const char *inaddr_name,
const char *hostname,
int ttl);
590 int evdns_server_request_add_cname_reply(
struct evdns_server_request *req,
const char *name,
const char *cname,
int ttl);
610 struct evdns_getaddrinfo_request;
629 struct evdns_base *dns_base,
630 const char *nodename,
const char *servname,
637 void evdns_getaddrinfo_cancel(
struct evdns_getaddrinfo_request *req);
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'.
void evdns_set_log_fn(evdns_debug_log_fn_type fn)
Set the callback function to handle DNS log messages.
int evdns_base_resolv_conf_parse(struct evdns_base *base, int flags, const char *const filename)
Parse a resolv.conf file.
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:489
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.
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.
int evdns_base_load_hosts(struct evdns_base *base, const char *hosts_fname)
Load an /etc/hosts-style file from 'hosts_fname' into 'base'.
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.
int evdns_base_resume(struct evdns_base *base)
Resume normal operation and continue any suspended resolve requests.
int evdns_server_request_drop(struct evdns_server_request *req)
Free a DNS request without sending back a reply.
const char * evdns_err_to_string(int err)
Convert a DNS error code to a string.
void evdns_close_server_port(struct evdns_server_port *port)
Close down a DNS server port, and free associated structures.
#define evutil_socket_t
A type wide enough to hold the output of "socket()" or "accept()".
Definition: util.h:274
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:199
int evdns_base_clear_nameservers_and_suspend(struct evdns_base *base)
Remove all configured nameservers, and suspend all pending resolves.
void evdns_base_search_ndots_set(struct evdns_base *base, const int ndots)
Set the 'ndots' parameter for searches.
Common convenience functions for cross-platform portability and related socket manipulations.
void(* evdns_request_callback_fn_type)(struct evdns_server_request *, void *)
A callback to implement a DNS server.
Definition: dns.h:542
int evdns_base_count_nameservers(struct evdns_base *base)
Get the number of configured nameservers.
struct evdns_base * evdns_base_new(struct event_base *event_base, int initialize_nameservers)
Initialize the asynchronous DNS library.
A definition of struct addrinfo for systems that lack it.
Definition: util.h:513
void(* evdns_getaddrinfo_cb)(int result, struct evutil_addrinfo *res, void *arg)
Callback for evdns_getaddrinfo.
Definition: dns.h:607
void evdns_set_random_bytes_fn(void(*fn)(char *, size_t))
Set a callback used to generate random bytes.
int evdns_base_set_option(struct evdns_base *base, const char *option, const char *val)
Set the value of a configuration option.
void evdns_set_transaction_id_fn(ev_uint16_t(*fn)(void))
Set a callback that will be invoked to generate transaction IDs.
void evdns_server_request_set_flags(struct evdns_server_request *req, int flags)
Sets some flags in a reply we're building.
void evdns_base_search_clear(struct evdns_base *base)
Obtain nameserver information using the Windows API.
void evdns_base_free(struct evdns_base *base, int fail_requests)
Shut down the asynchronous DNS resolver and terminate all active requests.
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.
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.
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.
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.
void evdns_cancel_request(struct evdns_base *base, struct evdns_request *req)
Cancels a pending DNS resolution request.
int evdns_base_nameserver_ip_add(struct evdns_base *base, const char *ip_as_string)
Add a nameserver by string address.
void evdns_base_search_add(struct evdns_base *base, const char *domain)
Add a domain to the list of search domains.
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.
Structure to hold information and state for a Libevent dispatch loop.
Definition: event.h:213
int evdns_base_nameserver_add(struct evdns_base *base, unsigned long int address)
Add a nameserver.