Add libevent-2.0.22-stable code
Existing NOTICE and MODULE_LICENSE_BSD_LIKE files describe this code.
Removed the following directories to reduce size:
WIN32-Code/*
compat/*
m4/*
sample/*
test/*
Bug: 22229743
Change-Id: I1f32e0e7467edaa3c5ea5991b5bbec2db50762ff
diff --git a/include/event2/dns_compat.h b/include/event2/dns_compat.h
new file mode 100644
index 0000000..7c1c776
--- /dev/null
+++ b/include/event2/dns_compat.h
@@ -0,0 +1,336 @@
+/*
+ * Copyright (c) 2006-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef _EVENT2_DNS_COMPAT_H_
+#define _EVENT2_DNS_COMPAT_H_
+
+/** @file event2/dns_compat.h
+
+ Potentially non-threadsafe versions of the functions in dns.h: provided
+ only for backwards compatibility.
+
+
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event-config.h>
+#ifdef _EVENT_HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef _EVENT_HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+/* For int types. */
+#include <event2/util.h>
+
+/**
+ Initialize the asynchronous DNS library.
+
+ This function initializes support for non-blocking name resolution by
+ calling evdns_resolv_conf_parse() on UNIX and
+ evdns_config_windows_nameservers() on Windows.
+
+ @deprecated This function is deprecated because it always uses the current
+ event base, and is easily confused by multiple calls to event_init(), and
+ so is not safe for multithreaded use. Additionally, it allocates a global
+ structure that only one thread can use. The replacement is
+ evdns_base_new().
+
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_shutdown()
+ */
+int evdns_init(void);
+
+struct evdns_base;
+/**
+ Return the global evdns_base created by event_init() and used by the other
+ deprecated functions.
+
+ @deprecated This function is deprecated because use of the global
+ evdns_base is error-prone.
+ */
+struct evdns_base *evdns_get_global_base(void);
+
+/**
+ Shut down the asynchronous DNS resolver and terminate all active requests.
+
+ If the 'fail_requests' option is enabled, all active requests will return
+ an empty result with the error flag set to DNS_ERR_SHUTDOWN. Otherwise,
+ the requests will be silently discarded.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_shutdown().
+
+ @param fail_requests if zero, active requests will be aborted; if non-zero,
+ active requests will return DNS_ERR_SHUTDOWN.
+ @see evdns_init()
+ */
+void evdns_shutdown(int fail_requests);
+
+/**
+ Add a nameserver.
+
+ The address should be an IPv4 address in network byte order.
+ The type of address is chosen so that it matches in_addr.s_addr.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_nameserver_add().
+
+ @param address an IP address in network byte order
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_nameserver_ip_add()
+ */
+int evdns_nameserver_add(unsigned long int address);
+
+/**
+ Get the number of configured nameservers.
+
+ This returns the number of configured nameservers (not necessarily the
+ number of running nameservers). This is useful for double-checking
+ whether our calls to the various nameserver configuration functions
+ have been successful.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_count_nameservers().
+
+ @return the number of configured nameservers
+ @see evdns_nameserver_add()
+ */
+int evdns_count_nameservers(void);
+
+/**
+ Remove all configured nameservers, and suspend all pending resolves.
+
+ Resolves will not necessarily be re-attempted until evdns_resume() is called.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_clear_nameservers_and_suspend().
+
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_resume()
+ */
+int evdns_clear_nameservers_and_suspend(void);
+
+/**
+ Resume normal operation and continue any suspended resolve requests.
+
+ Re-attempt resolves left in limbo after an earlier call to
+ evdns_clear_nameservers_and_suspend().
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_resume().
+
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_clear_nameservers_and_suspend()
+ */
+int evdns_resume(void);
+
+/**
+ Add a nameserver.
+
+ This wraps the evdns_nameserver_add() function by parsing a string as an IP
+ address and adds it as a nameserver.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_nameserver_ip_add().
+
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_nameserver_add()
+ */
+int evdns_nameserver_ip_add(const char *ip_as_string);
+
+/**
+ Lookup an A record for a given name.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_resolve_ipv4().
+
+ @param name a DNS hostname
+ @param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
+ @param callback a callback function to invoke when the request is completed
+ @param ptr an argument to pass to the callback function
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_resolve_ipv6(), evdns_resolve_reverse(), evdns_resolve_reverse_ipv6()
+ */
+int evdns_resolve_ipv4(const char *name, int flags, evdns_callback_type callback, void *ptr);
+
+/**
+ Lookup an AAAA record for a given name.
+
+ @param name a DNS hostname
+ @param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
+ @param callback a callback function to invoke when the request is completed
+ @param ptr an argument to pass to the callback function
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_resolve_ipv4(), evdns_resolve_reverse(), evdns_resolve_reverse_ipv6()
+ */
+int evdns_resolve_ipv6(const char *name, int flags, evdns_callback_type callback, void *ptr);
+
+struct in_addr;
+struct in6_addr;
+
+/**
+ Lookup a PTR record for a given IP address.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_resolve_reverse().
+
+ @param in an IPv4 address
+ @param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
+ @param callback a callback function to invoke when the request is completed
+ @param ptr an argument to pass to the callback function
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_resolve_reverse_ipv6()
+ */
+int evdns_resolve_reverse(const struct in_addr *in, int flags, evdns_callback_type callback, void *ptr);
+
+/**
+ Lookup a PTR record for a given IPv6 address.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_resolve_reverse_ipv6().
+
+ @param in an IPv6 address
+ @param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
+ @param callback a callback function to invoke when the request is completed
+ @param ptr an argument to pass to the callback function
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_resolve_reverse_ipv6()
+ */
+int evdns_resolve_reverse_ipv6(const struct in6_addr *in, int flags, evdns_callback_type callback, void *ptr);
+
+/**
+ Set the value of a configuration option.
+
+ The currently available configuration options are:
+
+ ndots, timeout, max-timeouts, max-inflight, and attempts
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_set_option().
+
+ @param option the name of the configuration option to be modified
+ @param val the value to be set
+ @param flags Ignored.
+ @return 0 if successful, or -1 if an error occurred
+ */
+int evdns_set_option(const char *option, const char *val, int flags);
+
+/**
+ Parse a resolv.conf file.
+
+ The 'flags' parameter determines what information is parsed from the
+ resolv.conf file. See the man page for resolv.conf for the format of this
+ file.
+
+ The following directives are not parsed from the file: sortlist, rotate,
+ no-check-names, inet6, debug.
+
+ If this function encounters an error, the possible return values are: 1 =
+ failed to open file, 2 = failed to stat file, 3 = file too large, 4 = out of
+ memory, 5 = short read from file, 6 = no nameservers listed in the file
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_resolv_conf_parse().
+
+ @param flags any of DNS_OPTION_NAMESERVERS|DNS_OPTION_SEARCH|DNS_OPTION_MISC|
+ DNS_OPTIONS_ALL
+ @param filename the path to the resolv.conf file
+ @return 0 if successful, or various positive error codes if an error
+ occurred (see above)
+ @see resolv.conf(3), evdns_config_windows_nameservers()
+ */
+int evdns_resolv_conf_parse(int flags, const char *const filename);
+
+/**
+ Clear the list of search domains.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_search_clear().
+ */
+void evdns_search_clear(void);
+
+/**
+ Add a domain to the list of search domains
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_search_add().
+
+ @param domain the domain to be added to the search list
+ */
+void evdns_search_add(const char *domain);
+
+/**
+ Set the 'ndots' parameter for searches.
+
+ Sets the number of dots which, when found in a name, causes
+ the first query to be without any search domain.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_search_ndots_set().
+
+ @param ndots the new ndots parameter
+ */
+void evdns_search_ndots_set(const int ndots);
+
+/**
+ As evdns_server_new_with_base.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which even_base it uses. The recommended
+ function is evdns_add_server_port_with_base().
+
+*/
+struct evdns_server_port *evdns_add_server_port(evutil_socket_t socket, int flags, evdns_request_callback_fn_type callback, void *user_data);
+
+#ifdef WIN32
+int evdns_config_windows_nameservers(void);
+#define EVDNS_CONFIG_WINDOWS_NAMESERVERS_IMPLEMENTED
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _EVENT2_EVENT_COMPAT_H_ */