2002-02-11 10:16:18 +00:00
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/*
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netutl.c -- some supporting network utility code
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2002-06-21 10:11:37 +00:00
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Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl>
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2000-2002 Guus Sliepen <guus@sliepen.eu.org>
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2002-02-11 10:16:18 +00:00
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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2002-06-21 10:11:37 +00:00
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$Id: netutl.c,v 1.12.4.40 2002/06/21 10:11:12 guus Exp $
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2002-02-11 10:16:18 +00:00
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*/
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#include "config.h"
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#include <fcntl.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <stdlib.h>
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2002-06-08 13:46:43 +00:00
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#ifdef HAVE_INTTYPES_H
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#include <inttypes.h>
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2002-06-05 00:25:55 +00:00
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#endif
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2002-02-11 10:16:18 +00:00
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#include <string.h>
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2002-02-18 16:25:19 +00:00
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#include <signal.h>
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2002-02-11 10:16:18 +00:00
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#include <sys/socket.h>
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#include <syslog.h>
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#include <arpa/inet.h>
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#include <utils.h>
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#include <xalloc.h>
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#include "errno.h"
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#include "conf.h"
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#include "net.h"
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#include "netutl.h"
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#include "system.h"
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2002-02-18 16:25:19 +00:00
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int hostnames = 0;
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/*
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Turn a string into a struct addrinfo.
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Return NULL on failure.
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*/
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struct addrinfo *str2addrinfo(char *address, char *service, int socktype)
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2002-02-11 10:16:18 +00:00
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{
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2002-02-18 16:25:19 +00:00
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struct addrinfo hint, *ai;
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int err;
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2002-02-11 10:16:18 +00:00
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cp
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2002-02-18 16:25:19 +00:00
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memset(&hint, 0, sizeof(hint));
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2002-02-11 10:16:18 +00:00
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2002-02-18 16:25:19 +00:00
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hint.ai_family = addressfamily;
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hint.ai_socktype = socktype;
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2002-02-11 10:16:18 +00:00
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2002-02-18 16:25:19 +00:00
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if((err = getaddrinfo(address, service, &hint, &ai)))
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2002-02-11 10:16:18 +00:00
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{
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2002-02-18 16:25:19 +00:00
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if(debug_lvl >= DEBUG_ERROR)
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syslog(LOG_WARNING, _("Error looking up %s port %s: %s\n"), address, service, gai_strerror(err));
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cp_trace();
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return NULL;
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2002-02-11 10:16:18 +00:00
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}
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2002-02-18 16:25:19 +00:00
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cp
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return ai;
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}
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sockaddr_t str2sockaddr(char *address, char *port)
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{
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struct addrinfo hint, *ai;
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sockaddr_t result;
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int err;
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cp
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memset(&hint, 0, sizeof(hint));
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hint.ai_family = AF_UNSPEC;
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hint.ai_flags = AI_NUMERICHOST;
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hint.ai_socktype = SOCK_STREAM;
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if((err = getaddrinfo(address, port, &hint, &ai) || !ai))
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2002-02-11 10:16:18 +00:00
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{
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2002-02-18 16:25:19 +00:00
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syslog(LOG_ERR, _("Error looking up %s port %s: %s\n"), address, port, gai_strerror(err));
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cp_trace();
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raise(SIGFPE);
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exit(0);
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2002-02-11 10:16:18 +00:00
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}
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2002-02-18 16:25:19 +00:00
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result = *(sockaddr_t *)ai->ai_addr;
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freeaddrinfo(ai);
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2002-02-11 10:16:18 +00:00
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cp
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2002-02-18 16:25:19 +00:00
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return result;
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2002-02-11 10:16:18 +00:00
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}
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2002-02-18 16:25:19 +00:00
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void sockaddr2str(sockaddr_t *sa, char **addrstr, char **portstr)
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2002-02-11 10:16:18 +00:00
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{
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2002-02-18 16:25:19 +00:00
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char address[NI_MAXHOST];
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char port[NI_MAXSERV];
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2002-02-26 22:47:51 +00:00
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char *scopeid;
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2002-02-18 16:25:19 +00:00
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int err;
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2002-02-11 10:16:18 +00:00
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cp
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2002-02-20 22:37:38 +00:00
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if((err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), NI_NUMERICHOST|NI_NUMERICSERV)))
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2002-02-11 10:16:18 +00:00
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{
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2002-02-18 16:25:19 +00:00
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syslog(LOG_ERR, _("Error while translating addresses: %s"), gai_strerror(err));
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cp_trace();
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raise(SIGFPE);
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exit(0);
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2002-02-11 10:16:18 +00:00
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}
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2002-02-26 22:47:51 +00:00
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if((scopeid = strchr(address, '%')))
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*scopeid = '\0'; /* Descope. */
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2002-02-18 16:25:19 +00:00
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*addrstr = xstrdup(address);
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*portstr = xstrdup(port);
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2002-02-11 10:16:18 +00:00
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cp
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}
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2002-02-18 16:25:19 +00:00
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char *sockaddr2hostname(sockaddr_t *sa)
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2002-02-11 10:16:18 +00:00
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{
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char *str;
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2002-02-18 16:25:19 +00:00
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char address[NI_MAXHOST] = "unknown";
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char port[NI_MAXSERV] = "unknown";
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int err;
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2002-02-11 10:16:18 +00:00
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cp
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2002-02-20 22:37:38 +00:00
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if((err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), hostnames?0:(NI_NUMERICHOST|NI_NUMERICSERV))))
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2002-02-18 16:25:19 +00:00
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{
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syslog(LOG_ERR, _("Error while looking up hostname: %s"), gai_strerror(err));
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}
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asprintf(&str, _("%s port %s"), address, port);
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2002-02-11 10:16:18 +00:00
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cp
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return str;
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}
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2002-02-18 16:25:19 +00:00
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int sockaddrcmp(sockaddr_t *a, sockaddr_t *b)
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{
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int result;
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cp
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result = a->sa.sa_family - b->sa.sa_family;
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if(result)
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return result;
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switch(a->sa.sa_family)
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{
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case AF_UNSPEC:
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return 0;
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case AF_INET:
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2002-02-26 22:47:51 +00:00
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result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
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if(result)
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return result;
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return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof(a->in.sin_port));
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2002-02-18 16:25:19 +00:00
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case AF_INET6:
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2002-02-26 22:47:51 +00:00
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result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
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if(result)
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return result;
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return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof(a->in6.sin6_port));
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2002-02-18 16:25:19 +00:00
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default:
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syslog(LOG_ERR, _("sockaddrcmp() was called with unknown address family %d, exitting!"), a->sa.sa_family);
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cp_trace();
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raise(SIGFPE);
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exit(0);
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}
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cp
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}
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2002-03-17 15:59:29 +00:00
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void sockaddrunmap(sockaddr_t *sa)
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{
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2002-03-17 16:08:39 +00:00
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if(sa->sa.sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr))
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2002-03-17 15:59:29 +00:00
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{
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2002-03-19 00:08:23 +00:00
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sa->in.sin_addr.s_addr = ((uint32_t *)&sa->in6.sin6_addr)[3];
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2002-03-17 15:59:29 +00:00
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sa->in.sin_family = AF_INET;
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}
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}
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2002-02-18 16:25:19 +00:00
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/* Subnet mask handling */
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2002-06-08 12:57:10 +00:00
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int maskcmp(void *va, void *vb, int masklen, int len)
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2002-02-18 16:25:19 +00:00
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{
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int i, m, result;
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2002-06-08 12:57:10 +00:00
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char *a = va;
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char *b = vb;
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2002-02-18 16:25:19 +00:00
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cp
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2002-02-20 17:15:33 +00:00
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for(m = masklen, i = 0; m >= 8; m -= 8, i++)
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2002-02-18 16:25:19 +00:00
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if((result = a[i] - b[i]))
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return result;
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if(m)
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2002-04-05 09:11:38 +00:00
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return (a[i] & (0x100 - (1 << (8 - m)))) - (b[i] & (0x100 - (1 << (8 - m))));
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2002-02-18 16:25:19 +00:00
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return 0;
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}
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2002-06-08 12:57:10 +00:00
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void mask(void *va, int masklen, int len)
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2002-02-18 16:25:19 +00:00
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{
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int i;
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2002-06-08 12:57:10 +00:00
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char *a = va;
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2002-02-18 16:25:19 +00:00
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cp
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i = masklen / 8;
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masklen %= 8;
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if(masklen)
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2002-04-05 09:11:38 +00:00
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a[i++] &= (0x100 - (1 << masklen));
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2002-02-18 16:25:19 +00:00
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for(; i < len; i++)
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a[i] = 0;
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}
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2002-06-08 12:57:10 +00:00
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void maskcpy(void *va, void *vb, int masklen, int len)
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2002-02-18 16:25:19 +00:00
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{
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int i, m;
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2002-06-08 12:57:10 +00:00
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char *a = va;
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char *b = vb;
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2002-02-18 16:25:19 +00:00
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cp
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2002-02-20 17:15:33 +00:00
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for(m = masklen, i = 0; m >= 8; m -= 8, i++)
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2002-02-18 16:25:19 +00:00
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a[i] = b[i];
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if(m)
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{
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2002-04-05 09:11:38 +00:00
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a[i] = b[i] & (0x100 - (1 << m));
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2002-02-18 16:25:19 +00:00
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i++;
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}
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for(; i < len; i++)
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a[i] = 0;
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}
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2002-06-08 12:57:10 +00:00
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int maskcheck(void *va, int masklen, int len)
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2002-02-18 16:25:19 +00:00
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{
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int i;
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2002-06-08 12:57:10 +00:00
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char *a = va;
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2002-02-18 16:25:19 +00:00
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cp
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i = masklen / 8;
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masklen %= 8;
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2002-06-07 11:14:05 +00:00
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if(a[i++] & (0xff >> masklen))
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return -1;
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2002-02-18 16:25:19 +00:00
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for(; i < len; i++)
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if(a[i] != 0)
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2002-06-07 11:14:05 +00:00
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return -2;
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2002-02-18 16:25:19 +00:00
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return 0;
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}
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