+++ /dev/null
-/*
- netutl.c -- some supporting network utility code
- Copyright (C) 1998-2002 Ivo Timmermans <itimmermans@bigfoot.com>
- 2000-2002 Guus Sliepen <guus@sliepen.warande.net>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id: netutl.c,v 1.1 2002/04/28 12:46:25 zarq Exp $
-*/
-
-#include "config.h"
-
-#include <fcntl.h>
-#include <netdb.h>
-#include <netinet/in.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <signal.h>
-#include <sys/socket.h>
-
-#include <arpa/inet.h>
-
-#include <utils.h>
-#include <xalloc.h>
-
-#include "errno.h"
-#include "conf.h"
-#include "net.h"
-#include "netutl.h"
-#include "logging.h"
-
-#include "system.h"
-
-int hostnames = 0;
-
-/*
- Turn a string into a struct addrinfo.
- Return NULL on failure.
-*/
-struct addrinfo *str2addrinfo(char *address, char *service, int socktype)
-{
- struct addrinfo hint, *ai;
- int err;
-cp
- memset(&hint, 0, sizeof(hint));
-
- hint.ai_family = addressfamily;
- hint.ai_socktype = socktype;
-
- if((err = getaddrinfo(address, service, &hint, &ai)))
- {
- if(debug_lvl >= DEBUG_ERROR)
- syslog(LOG_WARNING, _("Error looking up %s port %s: %s\n"), address, service, gai_strerror(err));
- cp_trace();
- return NULL;
- }
-
-cp
- return ai;
-}
-
-sockaddr_t str2sockaddr(char *address, char *port)
-{
- struct addrinfo hint, *ai;
- sockaddr_t result;
- int err;
-cp
- memset(&hint, 0, sizeof(hint));
-
- hint.ai_family = AF_UNSPEC;
- hint.ai_flags = AI_NUMERICHOST;
- hint.ai_socktype = SOCK_STREAM;
-
- if((err = getaddrinfo(address, port, &hint, &ai) || !ai))
- {
- syslog(LOG_ERR, _("Error looking up %s port %s: %s\n"), address, port, gai_strerror(err));
- cp_trace();
- raise(SIGFPE);
- exit(0);
- }
-
- result = *(sockaddr_t *)ai->ai_addr;
- freeaddrinfo(ai);
-cp
- return result;
-}
-
-void sockaddr2str(sockaddr_t *sa, char **addrstr, char **portstr)
-{
- char address[NI_MAXHOST];
- char port[NI_MAXSERV];
- char *scopeid;
- int err;
-cp
- if((err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), NI_NUMERICHOST|NI_NUMERICSERV)))
- {
- syslog(LOG_ERR, _("Error while translating addresses: %s"), gai_strerror(err));
- cp_trace();
- raise(SIGFPE);
- exit(0);
- }
-
-#ifdef HAVE_LINUX
- if((scopeid = strchr(address, '%')))
- *scopeid = '\0'; /* Descope. */
-#endif
-
- *addrstr = xstrdup(address);
- *portstr = xstrdup(port);
-cp
-}
-
-char *sockaddr2hostname(sockaddr_t *sa)
-{
- char *str;
- char address[NI_MAXHOST] = "unknown";
- char port[NI_MAXSERV] = "unknown";
- int err;
-cp
- if((err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), hostnames?0:(NI_NUMERICHOST|NI_NUMERICSERV))))
- {
- syslog(LOG_ERR, _("Error while looking up hostname: %s"), gai_strerror(err));
- }
-
- asprintf(&str, _("%s port %s"), address, port);
-cp
- return str;
-}
-
-int sockaddrcmp(sockaddr_t *a, sockaddr_t *b)
-{
- int result;
-cp
- result = a->sa.sa_family - b->sa.sa_family;
-
- if(result)
- return result;
-
- switch(a->sa.sa_family)
- {
- case AF_UNSPEC:
- return 0;
- case AF_INET:
- result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
- if(result)
- return result;
- return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof(a->in.sin_port));
- case AF_INET6:
- result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
- if(result)
- return result;
- return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof(a->in6.sin6_port));
- default:
- syslog(LOG_ERR, _("sockaddrcmp() was called with unknown address family %d, exitting!"), a->sa.sa_family);
- cp_trace();
- raise(SIGFPE);
- exit(0);
- }
-cp
-}
-
-void sockaddrunmap(sockaddr_t *sa)
-{
- if(sa->sa.sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr))
- {
- sa->in.sin_addr.s_addr = ((uint32_t *)&sa->in6.sin6_addr)[3];
- sa->in.sin_family = AF_INET;
- }
-}
-
-/* Subnet mask handling */
-
-int maskcmp(char *a, char *b, int masklen, int len)
-{
- int i, m, result;
-cp
- for(m = masklen, i = 0; m >= 8; m -= 8, i++)
- if((result = a[i] - b[i]))
- return result;
-
- if(m)
- return (a[i] & (0x100 - (1 << (8 - m)))) - (b[i] & (0x100 - (1 << (8 - m))));
-
- return 0;
-}
-
-void mask(char *a, int masklen, int len)
-{
- int i;
-cp
- i = masklen / 8;
- masklen %= 8;
-
- if(masklen)
- a[i++] &= (0x100 - (1 << masklen));
-
- for(; i < len; i++)
- a[i] = 0;
-}
-
-void maskcpy(char *a, char *b, int masklen, int len)
-{
- int i, m;
-cp
- for(m = masklen, i = 0; m >= 8; m -= 8, i++)
- a[i] = b[i];
-
- if(m)
- {
- a[i] = b[i] & (0x100 - (1 << m));
- i++;
- }
-
- for(; i < len; i++)
- a[i] = 0;
-}
-
-int maskcheck(char *a, int masklen, int len)
-{
- int i;
-cp
- i = masklen / 8;
- masklen %= 8;
-
- if(masklen)
- if(a[i++] & (char)~(0x100 - (1 << masklen)))
- return -1;
-
- for(; i < len; i++)
- if(a[i] != 0)
- return -1;
-
- return 0;
-}
projects / tinc / blobdiff