/* * Ouroboros - Copyright (C) 2016 - 2018 * * Policy for flat addresses in a distributed way * * Dimitri Staessens <dimitri.staessens@ugent.be> * Sander Vrijders <sander.vrijders@ugent.be> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., http://www.fsf.org/about/contact/. */ #define _POSIX_C_SOURCE 200112L #define OUROBOROS_PREFIX "flat-addr-auth" #include <ouroboros/logs.h> #include <ouroboros/errno.h> #include <ouroboros/time_utils.h> #include <ouroboros/utils.h> #include "ipcp.h" #include "flat.h" #include <time.h> #include <stdlib.h> #include <math.h> #include <string.h> #include <assert.h> #define NAME_LEN 8 struct { uint8_t addr_size; } flat; #define INVALID_ADDRESS 0 struct pol_addr_auth_ops flat_ops = { .init = flat_init, .fini = flat_fini, .address = flat_address }; int flat_init(const void * info) { flat.addr_size = *((uint8_t *) info); if (flat.addr_size != 4) { log_err("Flat address policy mandates 4 byte addresses."); return -1; } return 0; } int flat_fini(void) { return 0; } uint64_t flat_address(void) { struct timespec t; uint32_t addr; clock_gettime(CLOCK_REALTIME, &t); srand(t.tv_nsec); addr = (rand() % (RAND_MAX - 1) + 1) & 0xFFFFFFFF; return addr; }