Last bits of the merger.

src/netutl.c

@@ -0,0 +1,105 @@
+/*
+    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 1.12.4.23 2002/02/11 10:16:18 guus Exp $
+*/
+
+#include "config.h"
+
+#include <fcntl.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <syslog.h>
+#include <arpa/inet.h>
+
+#include <utils.h>
+#include <xalloc.h>
+
+#include "errno.h"
+#include "conf.h"
+#include "net.h"
+#include "netutl.h"
+
+#include "system.h"
+
+char *hostlookup(unsigned long addr)
+{
+  char *name;
+  struct hostent *host = NULL;
+  struct in_addr in;
+  int lookup_hostname = 0;
+cp
+  in.s_addr = addr;
+
+  get_config_bool(lookup_config(config_tree, "Hostnames"), &lookup_hostname);
+
+  if(lookup_hostname)
+    host = gethostbyaddr((char *)&in, sizeof(in), AF_INET);
+
+  if(!lookup_hostname || !host)
+    {
+      asprintf(&name, "%s", inet_ntoa(in));
+    }
+  else
+    {
+      asprintf(&name, "%s", host->h_name);
+    }
+cp
+  return name;
+}
+
+/*
+  Turn a string into an IP address
+  return NULL on failure
+  Should support IPv6 and other stuff in the future.
+*/
+ipv4_t str2address(char *str)
+{
+  ipv4_t address;
+  struct hostent *h;
+cp
+  if(!(h = gethostbyname(str)))
+    {
+      if(debug_lvl >= DEBUG_ERROR)
+        syslog(LOG_WARNING, _("Error looking up `%s': %s\n"), str, strerror(errno));
+        
+      return 0;
+    }
+
+  address = ntohl(*((ipv4_t*)(h->h_addr_list[0])));
+cp
+  return address;
+}
+
+char *address2str(ipv4_t address)
+{
+  char *str;
+cp
+  asprintf(&str, "%hu.%hu.%hu.%hu",
+	   (unsigned short int)((address >> 24) & 255),
+	   (unsigned short int)((address >> 16) & 255),
+	   (unsigned short int)((address >> 8) & 255),
+	   (unsigned short int)(address & 255));
+cp
+  return str;
+}

src/netutl.h

@@ -0,0 +1,32 @@
+/*
+    netutl.h -- header file for netutl.c
+    Copyright (C) 1998-2002 Ivo Timmermans <zarq@iname.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.h,v 1.2.4.9 2002/02/11 10:16:18 guus Exp $
+*/
+
+#ifndef __TINC_NETUTL_H__
+#define __TINC_NETUTL_H__
+
+#include "net.h"
+
+extern char *hostlookup(unsigned long);
+extern ipv4_t str2address(char*);
+extern char *address2str(ipv4_t);
+
+#endif /* __TINC_NETUTL_H__ */