new files

git-svn: trunk@1700

clamav-devel/ChangeLog

@@ -1,3 +1,7 @@
+Sun Aug 21 00:32:10 CEST 2005 (tk)
+----------------------------------
+  * shared/network.[ch]: new files (include r_gethostbyname by NJH)
+
 Wed Aug 17 15:53:33 CEST 2005 (acab)
 ------------------------------------
   * libclamav/spin.c: fixed bitmap shifting

clamav-devel/shared/network.c

@@ -0,0 +1,88 @@
+/*
+ *  Copyright (C) 2005 Nigel Horne <njh@bandsman.co.uk>
+ *
+ *  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.
+ *
+ */
+
+#if HAVE_CONFIG_H
+#include "clamav-config.h"
+#endif
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <netdb.h>
+
+#ifdef  CL_THREAD_SAFE
+#include <pthread.h>
+#endif
+
+/*
+ * TODO: gethostbyname_r is non-standard so different operating
+ * systems do it in different ways. Need more examples
+ * Perhaps we could use res_search()?
+ *
+ * Returns 0 for success
+ */
+int r_gethostbyname(const char *hostname, struct hostent *hp, char *buf, size_t len)
+{
+#if	defined(HAVE_GETHOSTBYNAME_R_6)
+	/* e.g. Linux */
+	struct hostent *hp2;
+	int ret = -1;
+
+	if((hostname == NULL) || (hp == NULL))
+		return -1;
+	if(gethostbyname_r(hostname, hp, buf, len, &hp2, &ret) < 0)
+		return ret;
+#elif	defined(HAVE_GETHOSTBYNAME_R_5)
+	/* e.g. BSD, Solaris, Cygwin */
+	int ret = -1;
+
+	if((hostname == NULL) || (hp == NULL))
+		return -1;
+	if(gethostbyname_r(hostname, hp, buf, len, &ret) == NULL)
+		return ret;
+#elif	defined(HAVE_GETHOSTBYNAME_R_3)
+	/* e.g. HP/UX, AIX */
+	if((hostname == NULL) || (hp == NULL))
+		return -1;
+	if(gethostbyname_r(hostname, &hp, (struct hostent_data *)buf) < 0)
+		return h_errno;
+#else
+	/* Single thread the code */
+	struct hostent *hp2;
+#ifdef  CL_THREAD_SAFE
+	static pthread_mutex_t hostent_mutex = PTHREAD_MUTEX_INITIALIZER;
+#endif
+
+	if((hostname == NULL) || (hp == NULL))
+		return -1;
+#ifdef  CL_THREAD_SAFE
+	pthread_mutex_lock(&hostent_mutex);
+#endif
+	if((hp2 = gethostbyname(hostname)) == NULL) {
+#ifdef  CL_THREAD_SAFE
+		pthread_mutex_unlock(&hostent_mutex);
+#endif
+		return h_errno;
+	}
+	memcpy(hp, hp2, sizeof(struct hostent));
+#ifdef  CL_THREAD_SAFE
+	pthread_mutex_unlock(&hostent_mutex);
+#endif
+
+	return 0;
+}

clamav-devel/shared/network.h

@@ -0,0 +1,28 @@
+/*
+ *  Copyright (C) 2005 Nigel Horne <njh@bandsman.co.uk>
+ *
+ *  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.
+ *
+ */
+
+#ifndef __NETWORK_H
+#define __NETWORK_H
+
+#include <sys/types.h>
+#include <netdb.h>
+
+int r_gethostbyname(const char *hostname, struct hostent *hp, char *buf, size_t len);
+
+#endif