/* * fwd - OpenWrt firewall daemon - commmon utility functions * * Copyright (C) 2009 Jo-Philipp Wich <xm@subsignal.org> * * The fwd 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. * * The fwd 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 the fwd program. If not, see http://www.gnu.org/licenses/. */ #include "fwd_utils.h" void fwd_log_init(void) { openlog("Firewall", 0, LOG_DAEMON | LOG_PERROR); } void __fwd_log(int prio, const char *msg, ...) { va_list ap; va_start(ap, msg); vsyslog(prio, msg, ap); va_end(ap); } int fwd_empty_cidr(struct fwd_cidr *c) { if( (c == NULL) || ((c->addr.s_addr == 0) && (c->prefix == 0)) ) return 1; return 0; } int fwd_equal_cidr(struct fwd_cidr *a, struct fwd_cidr *b) { if( fwd_empty_cidr(a) && fwd_empty_cidr(b) ) return 1; else if( (a->addr.s_addr == b->addr.s_addr) && (a->prefix == b->prefix) ) return 1; return 0; } void fwd_update_cidr(struct fwd_cidr *a, struct fwd_cidr *b) { if( a != NULL ) { a->addr.s_addr = b ? b->addr.s_addr : 0; a->prefix = b ? b->prefix : 0; } } /* fwd_zmalloc(size_t) * Allocates a zeroed buffer of the given size. */ void * fwd_zmalloc(size_t s) { void *b = malloc(s); if( b != NULL ) memset(b, 0, s); return b; }