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99 lines
2.9 KiB
99 lines
2.9 KiB
/* Copyright (c) 2014, Vsevolod Stakhov
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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 are met:
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* * 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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* * 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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*
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* THIS SOFTWARE IS PROVIDED ''AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY 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 THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef UTIL_H_
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#define UTIL_H_
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#include "dns_private.h"
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/**
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* Make a universal socket
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* @param credits host, ip or path to unix socket
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* @param port port (used for network sockets)
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* @param type of socket (SOCK_STREAM or SOCK_DGRAM)
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*/
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int
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rdns_make_client_socket (const char *credits,
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uint16_t port,
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int type,
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struct sockaddr **psockaddr,
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socklen_t *psocklen);
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/**
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* Generate new random DNS id
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* @return dns id
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*/
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uint16_t rdns_permutor_generate_id (void);
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/**
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* Free IO channel
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*/
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void rdns_ioc_free (struct rdns_io_channel *ioc);
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/**
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* Creates a new IO channel
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*/
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struct rdns_io_channel * rdns_ioc_new (struct rdns_server *srv,
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struct rdns_resolver *resolver,
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bool is_tcp);
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/**
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* Resets inactive/errored TCP chain as recommended by RFC
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* @param ioc
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*/
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void rdns_ioc_tcp_reset (struct rdns_io_channel *ioc);
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/**
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* Connect TCP IO channel to a server
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* @param ioc
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*/
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bool rdns_ioc_tcp_connect (struct rdns_io_channel *ioc);
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/**
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* Free request
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* @param req
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*/
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void rdns_request_free (struct rdns_request *req);
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/**
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* Removes request from a channel's hash (e.g. if needed to migrate to another channel)
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* @param req
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*/
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void rdns_request_remove_from_hash (struct rdns_request *req);
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/**
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* Creates a new reply
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* @param req
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* @param rcode
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* @return
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*/
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struct rdns_reply * rdns_make_reply (struct rdns_request *req, enum dns_rcode rcode);
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/**
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* Free reply
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* @param rep
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*/
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void rdns_reply_free (struct rdns_reply *rep);
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void rdns_request_unschedule (struct rdns_request *req, bool remove_from_hash);
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#endif /* UTIL_H_ */
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