update our libevent snapshot to 1.3c
This commit is contained in:
Charles Kerr
parent
82311abfbe
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71e89afb2a
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/*
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* Copyright (c) 2006 Niels Provos <provos@citi.umich.edu>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* The original DNS code is due to Adam Langley with heavy
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* modifications by Nick Mathewson. Adam put his DNS software in the
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* public domain. You can find his original copyright below. Please,
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* aware that the code as part of libevent is governed by the 3-clause
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* BSD license above.
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*
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* This software is Public Domain. To view a copy of the public domain dedication,
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* visit http://creativecommons.org/licenses/publicdomain/ or send a letter to
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* Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.
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*
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* I ask and expect, but do not require, that all derivative works contain an
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* attribution similar to:
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* Parts developed by Adam Langley <agl@imperialviolet.org>
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*
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* You may wish to replace the word "Parts" with something else depending on
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* the amount of original code.
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*
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* (Derivative works does not include programs which link against, run or include
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* the source verbatim in their source distributions)
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*/
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/*
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* Welcome, gentle reader
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*
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* Async DNS lookups are really a whole lot harder than they should be,
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* mostly stemming from the fact that the libc resolver has never been
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* very good at them. Before you use this library you should see if libc
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* can do the job for you with the modern async call getaddrinfo_a
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* (see http://www.imperialviolet.org/page25.html#e498). Otherwise,
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* please continue.
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*
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* This code is based on libevent and you must call event_init before
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* any of the APIs in this file. You must also seed the OpenSSL random
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* source if you are using OpenSSL for ids (see below).
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*
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* This library is designed to be included and shipped with your source
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* code. You statically link with it. You should also test for the
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* existence of strtok_r and define HAVE_STRTOK_R if you have it.
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*
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* The DNS protocol requires a good source of id numbers and these
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* numbers should be unpredictable for spoofing reasons. There are
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* three methods for generating them here and you must define exactly
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* one of them. In increasing order of preference:
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*
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* DNS_USE_GETTIMEOFDAY_FOR_ID:
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* Using the bottom 16 bits of the usec result from gettimeofday. This
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* is a pretty poor solution but should work anywhere.
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* DNS_USE_CPU_CLOCK_FOR_ID:
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* Using the bottom 16 bits of the nsec result from the CPU's time
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* counter. This is better, but may not work everywhere. Requires
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* POSIX realtime support and you'll need to link against -lrt on
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* glibc systems at least.
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* DNS_USE_OPENSSL_FOR_ID:
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* Uses the OpenSSL RAND_bytes call to generate the data. You must
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* have seeded the pool before making any calls to this library.
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*
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* The library keeps track of the state of nameservers and will avoid
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* them when they go down. Otherwise it will round robin between them.
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*
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* Quick start guide:
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* #include "evdns.h"
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* void callback(int result, char type, int count, int ttl,
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* void *addresses, void *arg);
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* evdns_resolv_conf_parse(DNS_OPTIONS_ALL, "/etc/resolv.conf");
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* evdns_resolve("www.hostname.com", 0, callback, NULL);
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*
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* When the lookup is complete the callback function is called. The
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* first argument will be one of the DNS_ERR_* defines in evdns.h.
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* Hopefully it will be DNS_ERR_NONE, in which case type will be
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* DNS_IPv4_A, count will be the number of IP addresses, ttl is the time
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* which the data can be cached for (in seconds), addresses will point
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* to an array of uint32_t's and arg will be whatever you passed to
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* evdns_resolve.
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*
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* Searching:
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*
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* In order for this library to be a good replacement for glibc's resolver it
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* supports searching. This involves setting a list of default domains, in
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* which names will be queried for. The number of dots in the query name
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* determines the order in which this list is used.
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*
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* Searching appears to be a single lookup from the point of view of the API,
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* although many DNS queries may be generated from a single call to
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* evdns_resolve. Searching can also drastically slow down the resolution
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* of names.
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*
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* To disable searching:
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* 1. Never set it up. If you never call evdns_resolv_conf_parse or
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* evdns_search_add then no searching will occur.
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*
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* 2. If you do call evdns_resolv_conf_parse then don't pass
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* DNS_OPTION_SEARCH (or DNS_OPTIONS_ALL, which implies it).
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*
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* 3. When calling evdns_resolve, pass the DNS_QUERY_NO_SEARCH flag.
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*
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* The order of searches depends on the number of dots in the name. If the
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* number is greater than the ndots setting then the names is first tried
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* globally. Otherwise each search domain is appended in turn.
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*
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* The ndots setting can either be set from a resolv.conf, or by calling
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* evdns_search_ndots_set.
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*
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* For example, with ndots set to 1 (the default) and a search domain list of
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* ["myhome.net"]:
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* Query: www
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* Order: www.myhome.net, www.
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*
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* Query: www.abc
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* Order: www.abc., www.abc.myhome.net
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*
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* API reference:
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*
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* int evdns_nameserver_add(unsigned long int address)
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* Add a nameserver. The address should be an IP address in
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* network byte order. The type of address is chosen so that
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* it matches in_addr.s_addr.
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* Returns non-zero on error.
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*
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* int evdns_nameserver_ip_add(const char *ip_as_string)
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* This wraps the above function by parsing a string as an IP
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* address and adds it as a nameserver.
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* Returns non-zero on error
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*
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* int evdns_resolve(const char *name, int flags,
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* evdns_callback_type callback,
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* void *ptr)
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* Resolve a name. The name parameter should be a DNS name.
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* The flags parameter should be 0, or DNS_QUERY_NO_SEARCH
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* which disables searching for this query. (see defn of
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* searching above).
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*
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* The callback argument is a function which is called when
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* this query completes and ptr is an argument which is passed
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* to that callback function.
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*
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* Returns non-zero on error
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*
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* void evdns_search_clear()
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* Clears the list of search domains
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*
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* void evdns_search_add(const char *domain)
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* Add a domain to the list of search domains
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*
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* void evdns_search_ndots_set(int ndots)
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* Set the number of dots which, when found in a name, causes
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* the first query to be without any search domain.
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*
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* int evdns_count_nameservers(void)
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* Return the number of configured nameservers (not necessarily the
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* number of running nameservers). This is useful for double-checking
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* whether our calls to the various nameserver configuration functions
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* have been successful.
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*
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* int evdns_clear_nameservers_and_suspend(void)
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* Remove all currently configured nameservers, and suspend all pending
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* resolves. Resolves will not necessarily be re-attempted until
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* evdns_resume() is called.
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*
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* int evdns_resume(void)
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* Re-attempt resolves left in limbo after an earlier call to
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* evdns_clear_nameservers_and_suspend().
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*
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* int evdns_config_windows_nameservers(void)
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* Attempt to configure a set of nameservers based on platform settings on
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* a win32 host. Preferentially tries to use GetNetworkParams; if that fails,
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* looks in the registry. Returns 0 on success, nonzero on failure.
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*
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* int evdns_resolv_conf_parse(int flags, const char *filename)
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* Parse a resolv.conf like file from the given filename.
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*
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* See the man page for resolv.conf for the format of this file.
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* The flags argument determines what information is parsed from
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* this file:
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* DNS_OPTION_SEARCH - domain, search and ndots options
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* DNS_OPTION_NAMESERVERS - nameserver lines
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* DNS_OPTION_MISC - timeout and attempts options
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* DNS_OPTIONS_ALL - all of the above
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* The following directives are not parsed from the file:
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* sortlist, rotate, no-check-names, inet6, debug
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*
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* Returns non-zero on error:
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* 0 no errors
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* 1 failed to open file
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* 2 failed to stat file
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* 3 file too large
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* 4 out of memory
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* 5 short read from file
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* 6 no nameservers in file
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*
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* Internals:
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*
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* Requests are kept in two queues. The first is the inflight queue. In
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* this queue requests have an allocated transaction id and nameserver.
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* They will soon be transmitted if they haven't already been.
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*
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* The second is the waiting queue. The size of the inflight ring is
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* limited and all other requests wait in waiting queue for space. This
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* bounds the number of concurrent requests so that we don't flood the
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* nameserver. Several algorithms require a full walk of the inflight
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* queue and so bounding its size keeps thing going nicely under huge
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* (many thousands of requests) loads.
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*
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* If a nameserver loses too many requests it is considered down and we
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* try not to use it. After a while we send a probe to that nameserver
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* (a lookup for google.com) and, if it replies, we consider it working
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* again. If the nameserver fails a probe we wait longer to try again
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* with the next probe.
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*/
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#ifndef EVENTDNS_H
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#define EVENTDNS_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Error codes 0-5 are as described in RFC 1035. */
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#define DNS_ERR_NONE 0
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/* The name server was unable to interpret the query */
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#define DNS_ERR_FORMAT 1
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/* The name server was unable to process this query due to a problem with the
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* name server */
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#define DNS_ERR_SERVERFAILED 2
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/* The domain name does not exist */
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#define DNS_ERR_NOTEXIST 3
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/* The name server does not support the requested kind of query */
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#define DNS_ERR_NOTIMPL 4
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/* The name server refuses to reform the specified operation for policy
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* reasons */
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#define DNS_ERR_REFUSED 5
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/* The reply was truncated or ill-formated */
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#define DNS_ERR_TRUNCATED 65
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/* An unknown error occurred */
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#define DNS_ERR_UNKNOWN 66
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/* Communication with the server timed out */
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#define DNS_ERR_TIMEOUT 67
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/* The request was canceled because the DNS subsystem was shut down. */
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#define DNS_ERR_SHUTDOWN 68
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#define DNS_IPv4_A 1
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#define DNS_PTR 2
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#define DNS_IPv6_AAAA 3
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#define DNS_QUERY_NO_SEARCH 1
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#define DNS_OPTION_SEARCH 1
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#define DNS_OPTION_NAMESERVERS 2
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#define DNS_OPTION_MISC 4
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#define DNS_OPTIONS_ALL 7
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/*
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* The callback that contains the results from a lookup.
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* - type is either DNS_IPv4_A or DNS_PTR or DNS_IPv6_AAAA
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* - count contains the number of addresses of form type
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* - ttl is the number of seconds the resolution may be cached for.
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* - addresses needs to be cast according to type
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*/
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typedef void (*evdns_callback_type) (int result, char type, int count, int ttl, void *addresses, void *arg);
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int evdns_init(void);
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void evdns_shutdown(int fail_requests);
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const char *evdns_err_to_string(int err);
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int evdns_nameserver_add(unsigned long int address);
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int evdns_count_nameservers(void);
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int evdns_clear_nameservers_and_suspend(void);
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int evdns_resume(void);
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int evdns_nameserver_ip_add(const char *ip_as_string);
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int evdns_resolve_ipv4(const char *name, int flags, evdns_callback_type callback, void *ptr);
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int evdns_resolve_ipv6(const char *name, int flags, evdns_callback_type callback, void *ptr);
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struct in_addr;
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struct in6_addr;
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int evdns_resolve_reverse(struct in_addr *in, int flags, evdns_callback_type callback, void *ptr);
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int evdns_resolve_reverse_ipv6(struct in6_addr *in, int flags, evdns_callback_type callback, void *ptr);
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int evdns_set_option(const char *option, const char *val, int flags);
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int evdns_resolv_conf_parse(int flags, const char *);
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#ifdef MS_WINDOWS
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int evdns_config_windows_nameservers(void);
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#endif
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void evdns_search_clear(void);
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void evdns_search_add(const char *domain);
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void evdns_search_ndots_set(const int ndots);
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typedef void (*evdns_debug_log_fn_type)(int is_warning, const char *msg);
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void evdns_set_log_fn(evdns_debug_log_fn_type fn);
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#define DNS_NO_SEARCH 1
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#ifdef __cplusplus
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}
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#endif
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/*
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* Structures and functions used to implement a DNS server.
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*/
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struct evdns_server_request {
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int flags;
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int nquestions;
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struct evdns_server_question **questions;
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};
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struct evdns_server_question {
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int type;
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int class;
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char name[1];
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};
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typedef void (*evdns_request_callback_fn_type)(struct evdns_server_request *, void *);
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#define EVDNS_ANSWER_SECTION 0
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#define EVDNS_AUTHORITY_SECTION 1
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#define EVDNS_ADDITIONAL_SECTION 2
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#define EVDNS_TYPE_A 1
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#define EVDNS_TYPE_NS 2
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#define EVDNS_TYPE_CNAME 5
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#define EVDNS_TYPE_SOA 6
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#define EVDNS_TYPE_PTR 12
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#define EVDNS_TYPE_MX 15
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#define EVDNS_TYPE_TXT 16
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#define EVDNS_TYPE_AAAA 28
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#define EVDNS_QTYPE_AXFR 252
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#define EVDNS_QTYPE_ALL 255
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|
||||||
|
#define EVDNS_CLASS_INET 1
|
||||||
|
|
||||||
|
struct evdns_server_port *evdns_add_server_port(int socket, int is_tcp, evdns_request_callback_fn_type callback, void *user_data);
|
||||||
|
void evdns_close_server_port(struct evdns_server_port *port);
|
||||||
|
|
||||||
|
int evdns_server_request_add_reply(struct evdns_server_request *req, int section, const char *name, int type, int class, int ttl, int datalen, int is_name, const char *data);
|
||||||
|
int evdns_server_request_add_a_reply(struct evdns_server_request *req, const char *name, int n, void *addrs, int ttl);
|
||||||
|
int evdns_server_request_add_aaaa_reply(struct evdns_server_request *req, const char *name, int n, void *addrs, int ttl);
|
||||||
|
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);
|
||||||
|
int evdns_server_request_add_cname_reply(struct evdns_server_request *req, const char *name, const char *cname, int ttl);
|
||||||
|
|
||||||
|
int evdns_server_request_respond(struct evdns_server_request *req, int err);
|
||||||
|
int evdns_server_request_drop(struct evdns_server_request *req);
|
||||||
|
struct sockaddr;
|
||||||
|
int evdns_server_request_get_requesting_addr(struct evdns_server_request *_req, struct sockaddr *sa, int addr_len);
|
||||||
|
|
||||||
|
#endif /* !EVENTDNS_H */
|
||||||
|
|
@ -31,6 +31,8 @@
|
||||||
extern "C" {
|
extern "C" {
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
|
#include <sys/time.h>
|
||||||
|
#include <stdint.h>
|
||||||
#include <stdarg.h>
|
#include <stdarg.h>
|
||||||
|
|
||||||
#ifdef WIN32
|
#ifdef WIN32
|
||||||
|
|
@ -131,16 +133,14 @@ TAILQ_HEAD (evkeyvalq, evkeyval);
|
||||||
|
|
||||||
struct eventop {
|
struct eventop {
|
||||||
char *name;
|
char *name;
|
||||||
void *(*init)(void);
|
void *(*init)(struct event_base *);
|
||||||
int (*add)(void *, struct event *);
|
int (*add)(void *, struct event *);
|
||||||
int (*del)(void *, struct event *);
|
int (*del)(void *, struct event *);
|
||||||
int (*recalc)(struct event_base *, void *, int);
|
int (*recalc)(struct event_base *, void *, int);
|
||||||
int (*dispatch)(struct event_base *, void *, struct timeval *);
|
int (*dispatch)(struct event_base *, void *, struct timeval *);
|
||||||
void (*dealloc)(void *);
|
void (*dealloc)(struct event_base *, void *);
|
||||||
};
|
};
|
||||||
|
|
||||||
#define TIMEOUT_DEFAULT {5, 0}
|
|
||||||
|
|
||||||
void *event_init(void);
|
void *event_init(void);
|
||||||
int event_dispatch(void);
|
int event_dispatch(void);
|
||||||
int event_base_dispatch(struct event_base *);
|
int event_base_dispatch(struct event_base *);
|
||||||
|
|
@ -184,6 +184,7 @@ int event_base_loopexit(struct event_base *, struct timeval *);
|
||||||
|
|
||||||
void event_set(struct event *, int, short, void (*)(int, short, void *), void *);
|
void event_set(struct event *, int, short, void (*)(int, short, void *), void *);
|
||||||
int event_once(int, short, void (*)(int, short, void *), void *, struct timeval *);
|
int event_once(int, short, void (*)(int, short, void *), void *, struct timeval *);
|
||||||
|
int event_base_once(struct event_base *, int, short, void (*)(int, short, void *), void *, struct timeval *);
|
||||||
|
|
||||||
int event_add(struct event *, struct timeval *);
|
int event_add(struct event *, struct timeval *);
|
||||||
int event_del(struct event *);
|
int event_del(struct event *);
|
||||||
|
|
@ -299,39 +300,37 @@ void evbuffer_setcb(struct evbuffer *, void (*)(struct evbuffer *, size_t, size_
|
||||||
|
|
||||||
void evtag_init(void);
|
void evtag_init(void);
|
||||||
|
|
||||||
void evtag_marshal(struct evbuffer *evbuf, u_int8_t tag, const void *data,
|
void evtag_marshal(struct evbuffer *evbuf, uint8_t tag, const void *data,
|
||||||
u_int32_t len);
|
uint32_t len);
|
||||||
|
|
||||||
void encode_int(struct evbuffer *evbuf, u_int32_t number);
|
void encode_int(struct evbuffer *evbuf, uint32_t number);
|
||||||
|
|
||||||
void evtag_marshal_int(struct evbuffer *evbuf, u_int8_t tag,
|
void evtag_marshal_int(struct evbuffer *evbuf, uint8_t tag, uint32_t integer);
|
||||||
u_int32_t integer);
|
|
||||||
|
|
||||||
void evtag_marshal_string(struct evbuffer *buf, u_int8_t tag,
|
void evtag_marshal_string(struct evbuffer *buf, uint8_t tag,
|
||||||
const char *string);
|
const char *string);
|
||||||
|
|
||||||
void evtag_marshal_timeval(struct evbuffer *evbuf, u_int8_t tag,
|
void evtag_marshal_timeval(struct evbuffer *evbuf, uint8_t tag,
|
||||||
struct timeval *tv);
|
struct timeval *tv);
|
||||||
|
|
||||||
void evtag_test(void);
|
void evtag_test(void);
|
||||||
|
|
||||||
int evtag_unmarshal(struct evbuffer *src, u_int8_t *ptag,
|
int evtag_unmarshal(struct evbuffer *src, uint8_t *ptag, struct evbuffer *dst);
|
||||||
struct evbuffer *dst);
|
int evtag_peek(struct evbuffer *evbuf, uint8_t *ptag);
|
||||||
int evtag_peek(struct evbuffer *evbuf, u_int8_t *ptag);
|
int evtag_peek_length(struct evbuffer *evbuf, uint32_t *plength);
|
||||||
int evtag_peek_length(struct evbuffer *evbuf, u_int32_t *plength);
|
int evtag_payload_length(struct evbuffer *evbuf, uint32_t *plength);
|
||||||
int evtag_payload_length(struct evbuffer *evbuf, u_int32_t *plength);
|
|
||||||
int evtag_consume(struct evbuffer *evbuf);
|
int evtag_consume(struct evbuffer *evbuf);
|
||||||
|
|
||||||
int evtag_unmarshal_int(struct evbuffer *evbuf, u_int8_t need_tag,
|
int evtag_unmarshal_int(struct evbuffer *evbuf, uint8_t need_tag,
|
||||||
u_int32_t *pinteger);
|
uint32_t *pinteger);
|
||||||
|
|
||||||
int evtag_unmarshal_fixed(struct evbuffer *src, u_int8_t need_tag, void *data,
|
int evtag_unmarshal_fixed(struct evbuffer *src, uint8_t need_tag, void *data,
|
||||||
size_t len);
|
size_t len);
|
||||||
|
|
||||||
int evtag_unmarshal_string(struct evbuffer *evbuf, u_int8_t need_tag,
|
int evtag_unmarshal_string(struct evbuffer *evbuf, uint8_t need_tag,
|
||||||
char **pstring);
|
char **pstring);
|
||||||
|
|
||||||
int evtag_unmarshal_timeval(struct evbuffer *evbuf, u_int8_t need_tag,
|
int evtag_unmarshal_timeval(struct evbuffer *evbuf, uint8_t need_tag,
|
||||||
struct timeval *ptv);
|
struct timeval *ptv);
|
||||||
|
|
||||||
#ifdef __cplusplus
|
#ifdef __cplusplus
|
||||||
|
|
|
||||||
|
|
@ -0,0 +1,219 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2000-2004 Niels Provos <provos@citi.umich.edu>
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* 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 _EVHTTP_H_
|
||||||
|
#define _EVHTTP_H_
|
||||||
|
|
||||||
|
#ifdef __cplusplus
|
||||||
|
extern "C" {
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifdef WIN32
|
||||||
|
#define WIN32_LEAN_AND_MEAN
|
||||||
|
#include <windows.h>
|
||||||
|
#include <winsock2.h>
|
||||||
|
#undef WIN32_LEAN_AND_MEAN
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Basic support for HTTP serving.
|
||||||
|
*
|
||||||
|
* As libevent is a library for dealing with event notification and most
|
||||||
|
* interesting applications are networked today, I have often found the
|
||||||
|
* need to write HTTP code. The following prototypes and definitions provide
|
||||||
|
* an application with a minimal interface for making HTTP requests and for
|
||||||
|
* creating a very simple HTTP server.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* Response codes */
|
||||||
|
#define HTTP_OK 200
|
||||||
|
#define HTTP_NOCONTENT 204
|
||||||
|
#define HTTP_MOVEPERM 301
|
||||||
|
#define HTTP_MOVETEMP 302
|
||||||
|
#define HTTP_NOTMODIFIED 304
|
||||||
|
#define HTTP_BADREQUEST 400
|
||||||
|
#define HTTP_NOTFOUND 404
|
||||||
|
#define HTTP_SERVUNAVAIL 503
|
||||||
|
|
||||||
|
struct evhttp;
|
||||||
|
struct evhttp_request;
|
||||||
|
struct evkeyvalq;
|
||||||
|
|
||||||
|
/* Start an HTTP server on the specified address and port */
|
||||||
|
struct evhttp *evhttp_start(const char *address, u_short port);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Free the previously create HTTP server. Works only if no requests are
|
||||||
|
* currently being served.
|
||||||
|
*/
|
||||||
|
void evhttp_free(struct evhttp* http);
|
||||||
|
|
||||||
|
/* Set a callback for a specified URI */
|
||||||
|
void evhttp_set_cb(struct evhttp *, const char *,
|
||||||
|
void (*)(struct evhttp_request *, void *), void *);
|
||||||
|
|
||||||
|
/* Removes the callback for a specified URI */
|
||||||
|
int evhttp_del_cb(struct evhttp *, const char *);
|
||||||
|
|
||||||
|
/* Set a callback for all requests that are not caught by specific callbacks */
|
||||||
|
void evhttp_set_gencb(struct evhttp *,
|
||||||
|
void (*)(struct evhttp_request *, void *), void *);
|
||||||
|
|
||||||
|
void evhttp_set_timeout(struct evhttp *, int timeout_in_secs);
|
||||||
|
|
||||||
|
/* Request/Response functionality */
|
||||||
|
|
||||||
|
void evhttp_send_error(struct evhttp_request *, int, const char *);
|
||||||
|
void evhttp_send_reply(struct evhttp_request *, int, const char *,
|
||||||
|
struct evbuffer *);
|
||||||
|
|
||||||
|
/* Low-level response interface, for streaming/chunked replies */
|
||||||
|
void evhttp_send_reply_start(struct evhttp_request *, int, const char *);
|
||||||
|
void evhttp_send_reply_chunk(struct evhttp_request *, struct evbuffer *);
|
||||||
|
void evhttp_send_reply_end(struct evhttp_request *);
|
||||||
|
|
||||||
|
/* Interfaces for making requests */
|
||||||
|
enum evhttp_cmd_type { EVHTTP_REQ_GET, EVHTTP_REQ_POST, EVHTTP_REQ_HEAD };
|
||||||
|
|
||||||
|
enum evhttp_request_kind { EVHTTP_REQUEST, EVHTTP_RESPONSE };
|
||||||
|
|
||||||
|
/*
|
||||||
|
* the request structure that a server receives.
|
||||||
|
* WARNING: expect this structure to change. I will try to provide
|
||||||
|
* reasonable accessors.
|
||||||
|
*/
|
||||||
|
struct evhttp_request {
|
||||||
|
TAILQ_ENTRY(evhttp_request) next;
|
||||||
|
|
||||||
|
/* the connection object that this request belongs to */
|
||||||
|
struct evhttp_connection *evcon;
|
||||||
|
int flags;
|
||||||
|
#define EVHTTP_REQ_OWN_CONNECTION 0x0001
|
||||||
|
#define EVHTTP_PROXY_REQUEST 0x0002
|
||||||
|
|
||||||
|
struct evkeyvalq *input_headers;
|
||||||
|
struct evkeyvalq *output_headers;
|
||||||
|
|
||||||
|
/* address of the remote host and the port connection came from */
|
||||||
|
char *remote_host;
|
||||||
|
u_short remote_port;
|
||||||
|
|
||||||
|
enum evhttp_request_kind kind;
|
||||||
|
enum evhttp_cmd_type type;
|
||||||
|
|
||||||
|
char *uri; /* uri after HTTP request was parsed */
|
||||||
|
|
||||||
|
char major; /* HTTP Major number */
|
||||||
|
char minor; /* HTTP Minor number */
|
||||||
|
|
||||||
|
int got_firstline;
|
||||||
|
int response_code; /* HTTP Response code */
|
||||||
|
char *response_code_line; /* Readable response */
|
||||||
|
|
||||||
|
struct evbuffer *input_buffer; /* read data */
|
||||||
|
int ntoread;
|
||||||
|
int chunked;
|
||||||
|
|
||||||
|
struct evbuffer *output_buffer; /* outgoing post or data */
|
||||||
|
|
||||||
|
/* Callback */
|
||||||
|
void (*cb)(struct evhttp_request *, void *);
|
||||||
|
void *cb_arg;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Chunked data callback - call for each completed chunk if
|
||||||
|
* specified. If not specified, all the data is delivered via
|
||||||
|
* the regular callback.
|
||||||
|
*/
|
||||||
|
void (*chunk_cb)(struct evhttp_request *, void *);
|
||||||
|
};
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Creates a new request object that needs to be filled in with the request
|
||||||
|
* parameters. The callback is executed when the request completed or an
|
||||||
|
* error occurred.
|
||||||
|
*/
|
||||||
|
struct evhttp_request *evhttp_request_new(
|
||||||
|
void (*cb)(struct evhttp_request *, void *), void *arg);
|
||||||
|
|
||||||
|
/* enable delivery of chunks to requestor */
|
||||||
|
void evhttp_request_set_chunked_cb(struct evhttp_request *,
|
||||||
|
void (*cb)(struct evhttp_request *, void *));
|
||||||
|
|
||||||
|
/* Frees the request object and removes associated events. */
|
||||||
|
void evhttp_request_free(struct evhttp_request *req);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* A connection object that can be used to for making HTTP requests. The
|
||||||
|
* connection object tries to establish the connection when it is given an
|
||||||
|
* http request object.
|
||||||
|
*/
|
||||||
|
struct evhttp_connection *evhttp_connection_new(
|
||||||
|
const char *address, unsigned short port);
|
||||||
|
|
||||||
|
/* Frees an http connection */
|
||||||
|
void evhttp_connection_free(struct evhttp_connection *evcon);
|
||||||
|
|
||||||
|
/* Sets the timeout for events related to this connection */
|
||||||
|
void evhttp_connection_set_timeout(struct evhttp_connection *evcon,
|
||||||
|
int timeout_in_secs);
|
||||||
|
|
||||||
|
/* Sets the retry limit for this connection - -1 repeats indefnitely */
|
||||||
|
void evhttp_connection_set_retries(struct evhttp_connection *evcon,
|
||||||
|
int retry_max);
|
||||||
|
|
||||||
|
/* Set a callback for connection close. */
|
||||||
|
void evhttp_connection_set_closecb(struct evhttp_connection *evcon,
|
||||||
|
void (*)(struct evhttp_connection *, void *), void *);
|
||||||
|
|
||||||
|
/* Get the remote address and port associated with this connection. */
|
||||||
|
void evhttp_connection_get_peer(struct evhttp_connection *evcon,
|
||||||
|
char **address, u_short *port);
|
||||||
|
|
||||||
|
/* The connection gets ownership of the request */
|
||||||
|
int evhttp_make_request(struct evhttp_connection *evcon,
|
||||||
|
struct evhttp_request *req,
|
||||||
|
enum evhttp_cmd_type type, const char *uri);
|
||||||
|
|
||||||
|
const char *evhttp_request_uri(struct evhttp_request *req);
|
||||||
|
|
||||||
|
/* Interfaces for dealing with HTTP headers */
|
||||||
|
|
||||||
|
const char *evhttp_find_header(const struct evkeyvalq *, const char *);
|
||||||
|
int evhttp_remove_header(struct evkeyvalq *, const char *);
|
||||||
|
int evhttp_add_header(struct evkeyvalq *, const char *, const char *);
|
||||||
|
void evhttp_clear_headers(struct evkeyvalq *);
|
||||||
|
|
||||||
|
/* Miscellaneous utility functions */
|
||||||
|
char *evhttp_encode_uri(const char *uri);
|
||||||
|
char *evhttp_decode_uri(const char *uri);
|
||||||
|
void evhttp_parse_query(const char *uri, struct evkeyvalq *);
|
||||||
|
char *evhttp_htmlescape(const char *html);
|
||||||
|
#ifdef __cplusplus
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#endif /* _EVHTTP_H_ */
|
||||||
Binary file not shown.
Loading…
Reference in New Issue