242 lines
6.1 KiB
C
242 lines
6.1 KiB
C
/**
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* @file init_config.c
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*
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* @brief Implementation of init_config_t.
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*
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*/
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/*
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* Copyright (C) 2005 Jan Hutter, Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "init_config.h"
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#include <utils/allocator.h>
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#include <utils/linked_list.h>
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#include <utils/logger.h>
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typedef struct private_init_config_t private_init_config_t;
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/**
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* Private data of an init_config_t object
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*/
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struct private_init_config_t {
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/**
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* Public part
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*/
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init_config_t public;
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/**
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* Host information of my host.
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*/
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host_t *my_host;
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/**
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* Host information of other host.
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*/
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host_t *other_host;
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/**
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* Supported proposals
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*/
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linked_list_t *proposals;
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};
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/**
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* Implementation of init_config_t.get_my_host.
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*/
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static host_t * get_my_host (private_init_config_t *this)
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{
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return this->my_host;
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}
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/**
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* Implementation of init_config_t.get_other_host.
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*/
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static host_t * get_other_host (private_init_config_t *this)
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{
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return this->other_host;
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}
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/**
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* Implementation of init_config_t.get_my_host_clone.
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*/
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static host_t * get_my_host_clone (private_init_config_t *this)
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{
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return this->my_host->clone(this->my_host);
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}
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/**
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* Implementation of init_config_t.get_other_host_clone.
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*/
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static host_t * get_other_host_clone (private_init_config_t *this)
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{
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return this->other_host->clone(this->other_host);
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}
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/**
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* Implementation of init_config_t.get_proposals.
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*/
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static linked_list_t* get_proposals (private_init_config_t *this)
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{
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return this->proposals;
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}
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/**
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* Implementation of init_config_t.select_proposal.
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*/
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static proposal_t *select_proposal(private_init_config_t *this, linked_list_t *proposals)
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{
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iterator_t *stored_iter, *supplied_iter;
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proposal_t *stored, *supplied, *selected;
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stored_iter = this->proposals->create_iterator(this->proposals, TRUE);
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supplied_iter = proposals->create_iterator(proposals, TRUE);
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/* compare all stored proposals with all supplied. Stored ones are preferred. */
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while (stored_iter->has_next(stored_iter))
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{
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supplied_iter->reset(supplied_iter);
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stored_iter->current(stored_iter, (void**)&stored);
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while (supplied_iter->has_next(supplied_iter))
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{
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supplied_iter->current(supplied_iter, (void**)&supplied);
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selected = stored->select(stored, supplied);
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if (selected)
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{
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/* they match, return */
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stored_iter->destroy(stored_iter);
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supplied_iter->destroy(supplied_iter);
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return selected;
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}
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}
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}
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/* no proposal match :-(, will result in a NO_PROPOSAL_CHOSEN... */
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stored_iter->destroy(stored_iter);
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supplied_iter->destroy(supplied_iter);
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return NULL;
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}
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/**
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* Implementation of init_config_t.add_proposal.
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*/
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static void add_proposal (private_init_config_t *this, proposal_t *proposal)
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{
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this->proposals->insert_last(this->proposals, proposal);
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}
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/**
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* Implementation of init_config_t.get_dh_group.
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*/
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static diffie_hellman_group_t get_dh_group(private_init_config_t *this)
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{
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iterator_t *iterator;
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proposal_t *proposal;
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algorithm_t *algo;
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iterator = this->proposals->create_iterator(this->proposals, TRUE);
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while (iterator->has_next(iterator))
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{
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iterator->current(iterator, (void**)&proposal);
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proposal->get_algorithm(proposal, IKE, DIFFIE_HELLMAN_GROUP, &algo);
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if (algo)
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{
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iterator->destroy(iterator);
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return algo->algorithm;
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}
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}
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iterator->destroy(iterator);
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return MODP_UNDEFINED;
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}
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/**
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* Implementation of init_config_t.check_dh_group.
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*/
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static bool check_dh_group(private_init_config_t *this, diffie_hellman_group_t dh_group)
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{
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iterator_t *prop_iter, *alg_iter;
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proposal_t *proposal;
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algorithm_t *algo;
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prop_iter = this->proposals->create_iterator(this->proposals, TRUE);
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while (prop_iter->has_next(prop_iter))
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{
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prop_iter->current(prop_iter, (void**)&proposal);
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alg_iter = proposal->create_algorithm_iterator(proposal, IKE, DIFFIE_HELLMAN_GROUP);
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while (alg_iter->has_next(alg_iter))
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{
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alg_iter->current(alg_iter, (void**)&algo);
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if (algo->algorithm == dh_group)
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{
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prop_iter->destroy(prop_iter);
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alg_iter->destroy(alg_iter);
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return TRUE;
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}
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}
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}
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prop_iter->destroy(prop_iter);
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alg_iter->destroy(alg_iter);
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return FALSE;
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}
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/**
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* Implementation of init_config_t.destroy.
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*/
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static void destroy (private_init_config_t *this)
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{
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proposal_t *proposal;
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while (this->proposals->remove_last(this->proposals, (void**)&proposal) == SUCCESS)
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{
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proposal->destroy(proposal);
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}
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this->proposals->destroy(this->proposals);
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this->my_host->destroy(this->my_host);
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this->other_host->destroy(this->other_host);
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allocator_free(this);
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}
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/**
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* Described in header.
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*/
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init_config_t * init_config_create(host_t *me, host_t *other)
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{
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private_init_config_t *this = allocator_alloc_thing(private_init_config_t);
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/* public functions */
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this->public.get_my_host = (host_t*(*)(init_config_t*))get_my_host;
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this->public.get_other_host = (host_t*(*)(init_config_t*))get_other_host;
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this->public.get_my_host_clone = (host_t*(*)(init_config_t*))get_my_host_clone;
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this->public.get_other_host_clone = (host_t*(*)(init_config_t*))get_other_host_clone;
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this->public.get_proposals = (linked_list_t*(*)(init_config_t*))get_proposals;
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this->public.select_proposal = (proposal_t*(*)(init_config_t*,linked_list_t*))select_proposal;
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this->public.add_proposal = (void(*)(init_config_t*, proposal_t*)) add_proposal;
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this->public.get_dh_group = (diffie_hellman_group_t(*)(init_config_t*)) get_dh_group;
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this->public.check_dh_group = (bool(*)(init_config_t*,diffie_hellman_group_t)) check_dh_group;
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this->public.destroy = (void(*)(init_config_t*))destroy;
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/* private variables */
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this->my_host = me;
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this->other_host = other;
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this->proposals = linked_list_create();
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return (&this->public);
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}
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