Adding upstream version 1:9.16.44.upstream/1%9.16.44upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 1214 insertions, 0 deletions

diff --git a/contrib/dlz/modules/filesystem/Makefile b/contrib/dlz/modules/filesystem/Makefile
new file mode 100644
index 0000000..40ecb79
--- /dev/null
+++ b/contrib/dlz/modules/filesystem/Makefile
@@ -0,0 +1,45 @@
+# Copyright Internet Systems Consortium, Inc. ("ISC")
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, you can obtain one at https://mozilla.org/MPL/2.0/.
+
+# Copyright (C) Stichting NLnet, Netherlands, stichting@nlnet.nl.
+#
+# The development of Dynamically Loadable Zones (DLZ) for Bind 9 was
+# conceived and contributed by Rob Butler.
+#
+# SPDX-License-Identifier: ISC and MPL-2.0
+#
+# Permission to use, copy, modify, and distribute this software for any purpose
+# with or without fee is hereby granted, provided that the above copyright
+# notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND STICHTING NLNET DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL STICHTING NLNET BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+# OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+prefix = /usr
+libdir = $(prefix)/lib/bind9
+
+CFLAGS=-fPIC -g -I../include
+
+all: dlz_filesystem_dynamic.so
+
+dir.o: dir.c
+	$(CC) $(CFLAGS) -c dir.c
+
+dlz_filesystem_dynamic.so: dlz_filesystem_dynamic.c dir.o
+	$(CC) $(CFLAGS) -shared -o dlz_filesystem_dynamic.so \
+		dlz_filesystem_dynamic.c dir.o
+
+clean:
+	rm -f dlz_filesystem_dynamic.so *.o
+
+install: dlz_filesystem_dynamic.so
+	mkdir -p $(DESTDIR)$(libdir)
+	install dlz_filesystem_dynamic.so $(DESTDIR)$(libdir)
diff --git a/contrib/dlz/modules/filesystem/dir.c b/contrib/dlz/modules/filesystem/dir.c
new file mode 100644
index 0000000..f2b3a4e
--- /dev/null
+++ b/contrib/dlz/modules/filesystem/dir.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "dir.h"
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "dlz_minimal.h"
+
+void
+dir_init(dir_t *dir) {
+	dir->entry.name[0] = '\0';
+	dir->entry.length = 0;
+
+	dir->handle = NULL;
+}
+
+isc_result_t
+dir_open(dir_t *dir, const char *dirname) {
+	char *p;
+	isc_result_t result = ISC_R_SUCCESS;
+
+	if (strlen(dirname) + 3 > sizeof(dir->dirname)) {
+		return (ISC_R_NOSPACE);
+	}
+	strcpy(dir->dirname, dirname);
+
+	p = dir->dirname + strlen(dir->dirname);
+	if (dir->dirname < p && *(p - 1) != '/') {
+		*p++ = '/';
+	}
+	*p++ = '*';
+	*p = '\0';
+
+	dir->handle = opendir(dirname);
+	if (dir->handle == NULL) {
+		switch (errno) {
+		case ENOTDIR:
+		case ELOOP:
+		case EINVAL:
+		case ENAMETOOLONG:
+		case EBADF:
+			result = ISC_R_INVALIDFILE;
+			break;
+		case ENOENT:
+			result = ISC_R_FILENOTFOUND;
+			break;
+		case EACCES:
+		case EPERM:
+			result = ISC_R_NOPERM;
+			break;
+		case ENOMEM:
+			result = ISC_R_NOMEMORY;
+			break;
+		default:
+			result = ISC_R_UNEXPECTED;
+			break;
+		}
+	}
+
+	return (result);
+}
+
+/*!
+ * \brief Return previously retrieved file or get next one.
+ *
+ * Unix's dirent has
+ * separate open and read functions, but the Win32 and DOS interfaces open
+ * the dir stream and reads the first file in one operation.
+ */
+isc_result_t
+dir_read(dir_t *dir) {
+	struct dirent *entry;
+
+	entry = readdir(dir->handle);
+	if (entry == NULL) {
+		return (ISC_R_NOMORE);
+	}
+
+	if (sizeof(dir->entry.name) <= strlen(entry->d_name)) {
+		return (ISC_R_UNEXPECTED);
+	}
+
+	strcpy(dir->entry.name, entry->d_name);
+
+	dir->entry.length = strlen(entry->d_name);
+	return (ISC_R_SUCCESS);
+}
+
+/*!
+ * \brief Close directory stream.
+ */
+void
+dir_close(dir_t *dir) {
+	(void)closedir(dir->handle);
+	dir->handle = NULL;
+}
+
+/*!
+ * \brief Reposition directory stream at start.
+ */
+isc_result_t
+dir_reset(dir_t *dir) {
+	rewinddir(dir->handle);
+
+	return (ISC_R_SUCCESS);
+}
diff --git a/contrib/dlz/modules/filesystem/dir.h b/contrib/dlz/modules/filesystem/dir.h
new file mode 100644
index 0000000..bf96e39
--- /dev/null
+++ b/contrib/dlz/modules/filesystem/dir.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include <dirent.h>
+#include <sys/types.h>
+
+#include <dlz_minimal.h>
+
+#define DIR_NAMEMAX 256
+#define DIR_PATHMAX 1024
+
+typedef struct direntry {
+	char name[DIR_NAMEMAX];
+	unsigned int length;
+} direntry_t;
+
+typedef struct dir {
+	char dirname[DIR_PATHMAX];
+	direntry_t entry;
+	DIR *handle;
+} dir_t;
+
+void
+dir_init(dir_t *dir);
+
+isc_result_t
+dir_open(dir_t *dir, const char *dirname);
+
+isc_result_t
+dir_read(dir_t *dir);
+
+isc_result_t
+dir_reset(dir_t *dir);
+
+void
+dir_close(dir_t *dir);
diff --git a/contrib/dlz/modules/filesystem/dlz_filesystem_dynamic.c b/contrib/dlz/modules/filesystem/dlz_filesystem_dynamic.c
new file mode 100644
index 0000000..3b8a8bb
--- /dev/null
+++ b/contrib/dlz/modules/filesystem/dlz_filesystem_dynamic.c
@@ -0,0 +1,1008 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0 and ISC
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+/*
+ * Copyright (C) 2002 Stichting NLnet, Netherlands, stichting@nlnet.nl.
+ *
+ * The development of Dynamically Loadable Zones (DLZ) for Bind 9 was
+ * conceived and contributed by Rob Butler.
+ *
+ * Permission to use, copy, modify, and distribute this software for any purpose
+ * with or without fee is hereby granted, provided that the above copyright
+ * notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This provides the externally loadable filesystem DLZ module, without
+ * update support
+ */
+
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+
+#include "dir.h"
+#include "dlz_list.h"
+#include "dlz_minimal.h"
+
+typedef struct config_data {
+	char *basedir;
+	int basedirsize;
+	char *datadir;
+	int datadirsize;
+	char *xfrdir;
+	int xfrdirsize;
+	int splitcnt;
+	char separator;
+	char pathsep;
+
+	/* Helper functions from the dlz_dlopen driver */
+	log_t *log;
+	dns_sdlz_putrr_t *putrr;
+	dns_sdlz_putnamedrr_t *putnamedrr;
+	dns_dlz_writeablezone_t *writeable_zone;
+} config_data_t;
+
+typedef struct dir_entry dir_entry_t;
+
+struct dir_entry {
+	char dirpath[DIR_PATHMAX];
+	DLZ_LINK(dir_entry_t) link;
+};
+
+typedef DLZ_LIST(dir_entry_t) dlist_t;
+
+/* forward reference */
+
+static void
+b9_add_helper(struct config_data *cd, const char *helper_name, void *ptr);
+
+/*
+ * Private methods
+ */
+static bool
+is_safe(const char *input) {
+	unsigned int i;
+	unsigned int len = strlen(input);
+
+	/* check that only allowed characters are in the domain name */
+	for (i = 0; i < len; i++) {
+		/* '.' is allowed, but has special requirements */
+		if (input[i] == '.') {
+			/* '.' is not allowed as first char */
+			if (i == 0) {
+				return (false);
+			}
+			/* '..', two dots together is not allowed. */
+			if (input[i - 1] == '.') {
+				return (false);
+			}
+			/* '.' is not allowed as last char */
+			if (i == len - 1) {
+				return (false);
+			}
+			/* only 1 dot in ok location, continue at next char */
+			continue;
+		}
+		/* '-' is allowed, continue at next char */
+		if (input[i] == '-') {
+			continue;
+		}
+		/* 0-9 is allowed, continue at next char */
+		if (input[i] >= '0' && input[i] <= '9') {
+			continue;
+		}
+		/* A-Z uppercase is allowed, continue at next char */
+		if (input[i] >= 'A' && input[i] <= 'Z') {
+			continue;
+		}
+		/* a-z lowercase is allowed, continue at next char */
+		if (input[i] >= 'a' && input[i] <= 'z') {
+			continue;
+		}
+
+		/*
+		 * colon needs to be allowed for IPV6 client
+		 * addresses.  Not dangerous in domain names, as not a
+		 * special char.
+		 */
+		if (input[i] == ':') {
+			continue;
+		}
+
+		/*
+		 * '@' needs to be allowed for in zone data.  Not
+		 * dangerous in domain names, as not a special char.
+		 */
+		if (input[i] == '@') {
+			continue;
+		}
+
+		/*
+		 * if we reach this point we have encountered a
+		 * disallowed char!
+		 */
+		return (false);
+	}
+	/* everything ok. */
+	return (true);
+}
+
+static isc_result_t
+create_path_helper(char *out, const char *in, config_data_t *cd) {
+	char *tmpString;
+	char *tmpPtr;
+	int i;
+
+	tmpString = strdup(in);
+	if (tmpString == NULL) {
+		return (ISC_R_NOMEMORY);
+	}
+
+	/*
+	 * don't forget is_safe guarantees '.' will NOT be the
+	 * first/last char
+	 */
+	while ((tmpPtr = strrchr(tmpString, '.')) != NULL) {
+		i = 0;
+		while (tmpPtr[i + 1] != '\0') {
+			if (cd->splitcnt < 1) {
+				strcat(out, (char *)&tmpPtr[i + 1]);
+			} else {
+				strncat(out, (char *)&tmpPtr[i + 1],
+					cd->splitcnt);
+			}
+			strncat(out, (char *)&cd->pathsep, 1);
+			if (cd->splitcnt == 0) {
+				break;
+			}
+			if (strlen((char *)&tmpPtr[i + 1]) <=
+			    (unsigned int)cd->splitcnt)
+			{
+				break;
+			}
+			i += cd->splitcnt;
+		}
+		tmpPtr[0] = '\0';
+	}
+
+	/* handle the "first" label properly */
+	i = 0;
+	tmpPtr = tmpString;
+	while (tmpPtr[i] != '\0') {
+		if (cd->splitcnt < 1) {
+			strcat(out, (char *)&tmpPtr[i]);
+		} else {
+			strncat(out, (char *)&tmpPtr[i], cd->splitcnt);
+		}
+		strncat(out, (char *)&cd->pathsep, 1);
+		if (cd->splitcnt == 0) {
+			break;
+		}
+		if (strlen((char *)&tmpPtr[i]) <= (unsigned int)cd->splitcnt) {
+			break;
+		}
+		i += cd->splitcnt;
+	}
+
+	free(tmpString);
+	return (ISC_R_SUCCESS);
+}
+
+/*%
+ * Checks to make sure zone and host are safe.  If safe, then
+ * hashes zone and host strings to build a path.  If zone / host
+ * are not safe an error is returned.
+ */
+
+static isc_result_t
+create_path(const char *zone, const char *host, const char *client,
+	    config_data_t *cd, char **path) {
+	char *tmpPath;
+	int pathsize;
+	int len;
+	isc_result_t result;
+	bool isroot = false;
+
+	/* special case for root zone */
+	if (strcmp(zone, ".") == 0) {
+		isroot = true;
+	}
+
+	/* if the requested zone is "unsafe", return error */
+	if (!isroot && !is_safe(zone)) {
+		return (ISC_R_FAILURE);
+	}
+
+	/* if host was passed, verify that it is safe */
+	if (host != NULL && !is_safe(host)) {
+		return (ISC_R_FAILURE);
+	}
+
+	/* if client was passed, verify that it is safe */
+	if (client != NULL && !is_safe(client)) {
+		return (ISC_R_FAILURE);
+	}
+
+	/* Determine how much memory the split up string will require */
+	if (host != NULL) {
+		len = strlen(zone) + strlen(host);
+	} else if (client != NULL) {
+		len = strlen(zone) + strlen(client);
+	} else {
+		len = strlen(zone);
+	}
+
+	/*
+	 * even though datadir and xfrdir will never be in the same
+	 * string we only waste a few bytes by allocating for both,
+	 * and then we are safe from buffer overruns.
+	 */
+	pathsize = len + cd->basedirsize + cd->datadirsize + cd->xfrdirsize + 4;
+
+	/* if we are splitting names, we will need extra space. */
+	if (cd->splitcnt > 0) {
+		pathsize += len / cd->splitcnt;
+	}
+
+	tmpPath = malloc(pathsize * sizeof(char));
+	if (tmpPath == NULL) {
+		/* write error message */
+		cd->log(ISC_LOG_ERROR, "Filesystem driver unable to "
+				       "allocate memory in create_path().");
+		result = ISC_R_NOMEMORY;
+		goto cleanup_mem;
+	}
+
+	/*
+	 * build path string.
+	 * start out with base directory.
+	 */
+	strcpy(tmpPath, cd->basedir);
+
+	/* add zone name - parsed properly */
+	if (!isroot) {
+		result = create_path_helper(tmpPath, zone, cd);
+		if (result != ISC_R_SUCCESS) {
+			goto cleanup_mem;
+		}
+	}
+
+	/*
+	 * When neither client or host is passed we are building a
+	 * path to see if a zone is supported.  We require that a zone
+	 * path have the "data dir" directory contained within it so
+	 * that we know this zone is really supported.  Otherwise,
+	 * this zone may not really be supported because we are
+	 * supporting a delagated sub zone.
+	 *
+	 * Example:
+	 *
+	 * We are supporting long.domain.com and using a splitcnt of
+	 * 0.  the base dir is "/base-dir/" and the data dir is
+	 * "/.datadir" We want to see if we are authoritative for
+	 * domain.com.  Path /base-dir/com/domain/.datadir since
+	 * /base-dir/com/domain/.datadir does not exist, we are not
+	 * authoritative for the domain "domain.com".  However we are
+	 * authoritative for the domain "long.domain.com" because the
+	 * path /base-dir/com/domain/long/.datadir does exist!
+	 */
+
+	/* if client is passed append xfr dir, otherwise append data dir */
+	if (client != NULL) {
+		strcat(tmpPath, cd->xfrdir);
+		strncat(tmpPath, (char *)&cd->pathsep, 1);
+		strcat(tmpPath, client);
+	} else {
+		strcat(tmpPath, cd->datadir);
+	}
+
+	/* if host not null, add it. */
+	if (host != NULL) {
+		strncat(tmpPath, (char *)&cd->pathsep, 1);
+		result = create_path_helper(tmpPath, host, cd);
+		if (result != ISC_R_SUCCESS) {
+			goto cleanup_mem;
+		}
+	}
+
+	/* return the path we built. */
+	*path = tmpPath;
+
+	/* return success */
+	result = ISC_R_SUCCESS;
+
+cleanup_mem:
+	/* cleanup memory */
+
+	/* free tmpPath memory */
+	if (tmpPath != NULL && result != ISC_R_SUCCESS) {
+		free(tmpPath);
+	}
+
+	return (result);
+}
+
+static isc_result_t
+process_dir(dir_t *dir, void *passback, config_data_t *cd, dlist_t *dir_list,
+	    unsigned int basedirlen) {
+	char tmp[DIR_PATHMAX + DIR_NAMEMAX];
+	int astPos;
+	struct stat sb;
+	isc_result_t result = ISC_R_FAILURE;
+	char *endp;
+	char *type;
+	char *ttlStr;
+	char *data;
+	char host[DIR_NAMEMAX];
+	char *tmpString;
+	char *tmpPtr;
+	int ttl;
+	int i;
+	int len;
+	dir_entry_t *direntry;
+	bool foundHost;
+
+	tmp[0] = '\0'; /* set 1st byte to '\0' so strcpy works right. */
+	host[0] = '\0';
+	foundHost = false;
+
+	/* copy base directory name to tmp. */
+	strcpy(tmp, dir->dirname);
+
+	/* dir->dirname will always have '*' as the last char. */
+	astPos = strlen(dir->dirname) - 1;
+
+	/* if dir_list != NULL, were are performing a zone xfr */
+	if (dir_list != NULL) {
+		/* if splitcnt == 0, determine host from path. */
+		if (cd->splitcnt == 0) {
+			if (strlen(tmp) - 3 > basedirlen) {
+				tmp[astPos - 1] = '\0';
+				tmpString = (char *)&tmp[basedirlen + 1];
+				/* handle filesystem's special wildcard "-"  */
+				if (strcmp(tmpString, "-") == 0) {
+					strcpy(host, "*");
+				} else {
+					/*
+					 * not special wildcard -- normal name
+					 */
+					while ((tmpPtr = strrchr(
+							tmpString,
+							cd->pathsep)) != NULL)
+					{
+						if ((strlen(host) +
+						     strlen(tmpPtr + 1) + 2) >
+						    DIR_NAMEMAX)
+						{
+							continue;
+						}
+						strcat(host, tmpPtr + 1);
+						strcat(host, ".");
+						tmpPtr[0] = '\0';
+					}
+					if ((strlen(host) + strlen(tmpString) +
+					     1) <= DIR_NAMEMAX)
+					{
+						strcat(host, tmpString);
+					}
+				}
+
+				foundHost = true;
+				/* set tmp again for use later */
+				strcpy(tmp, dir->dirname);
+			}
+		} else {
+			/*
+			 * if splitcnt != 0 determine host from
+			 * ".host" directory entry
+			 */
+			while (dir_read(dir) == ISC_R_SUCCESS) {
+				if (strncasecmp(".host", dir->entry.name, 5) ==
+				    0)
+				{
+					/*
+					 * handle filesystem's special
+					 * wildcard "-"
+					 */
+					if (strcmp((char *)&dir->entry.name[6],
+						   "-") == 0)
+					{
+						strcpy(host, "*");
+					} else {
+						strncpy(host,
+							(char *)&dir->entry
+								.name[6],
+							sizeof(host) - 1);
+						host[255] = '\0';
+					}
+					foundHost = true;
+					break;
+				}
+			}
+			/* reset dir list for use later */
+			dir_reset(dir);
+		} /* end of else */
+	}
+
+	while (dir_read(dir) == ISC_R_SUCCESS) {
+		cd->log(ISC_LOG_DEBUG(1),
+			"Filesystem driver Dir name:"
+			" '%s' Dir entry: '%s'\n",
+			dir->dirname, dir->entry.name);
+
+		/* skip any entries starting with "." */
+		if (dir->entry.name[0] == '.') {
+			continue;
+		}
+
+		/*
+		 * get rid of '*', set to NULL.  Effectively trims
+		 * string from previous loop to base directory only
+		 * while still leaving memory for concat to be
+		 * performed next.
+		 */
+
+		tmp[astPos] = '\0';
+
+		/* add name to base directory name. */
+		strcat(tmp, dir->entry.name);
+
+		/* make sure we can stat entry */
+		if (stat(tmp, &sb) == 0) {
+			/* if entry is a directory */
+			if ((sb.st_mode & S_IFDIR) != 0) {
+				/*
+				 * if dir list is NOT NULL, add dir to
+				 * dir list
+				 */
+				if (dir_list != NULL) {
+					direntry = malloc(sizeof(dir_entry_t));
+					if (direntry == NULL) {
+						return (ISC_R_NOMEMORY);
+					}
+					strcpy(direntry->dirpath, tmp);
+					DLZ_LINK_INIT(direntry, link);
+					DLZ_LIST_APPEND(*dir_list, direntry,
+							link);
+					result = ISC_R_SUCCESS;
+				}
+				continue;
+
+				/*
+				 * if entry is a file be sure we do
+				 * not add entry to DNS results if we
+				 * are performing a zone xfr and we
+				 * could not find a host entry.
+				 */
+			} else if (dir_list != NULL && !foundHost) {
+				continue;
+			}
+		} else { /* if we cannot stat entry, skip it. */
+			continue;
+		}
+
+		type = dir->entry.name;
+		ttlStr = strchr(type, cd->separator);
+		if (ttlStr == NULL) {
+			cd->log(ISC_LOG_ERROR,
+				"Filesystem driver: "
+				"%s could not be parsed properly",
+				tmp);
+			return (ISC_R_FAILURE);
+		}
+
+		/* replace separator char with NULL to split string */
+		ttlStr[0] = '\0';
+		/* start string after NULL of previous string */
+		ttlStr = (char *)&ttlStr[1];
+
+		data = strchr(ttlStr, cd->separator);
+		if (data == NULL) {
+			cd->log(ISC_LOG_ERROR,
+				"Filesystem driver: "
+				"%s could not be parsed properly",
+				tmp);
+			return (ISC_R_FAILURE);
+		}
+
+		/* replace separator char with NULL to split string */
+		data[0] = '\0';
+
+		/* start string after NULL of previous string */
+		data = (char *)&data[1];
+
+		/* replace all cd->separator chars with a space. */
+		len = strlen(data);
+
+		for (i = 0; i < len; i++) {
+			if (data[i] == cd->separator) {
+				data[i] = ' ';
+			}
+		}
+
+		/* convert text to int, make sure it worked right */
+		ttl = strtol(ttlStr, &endp, 10);
+		if (*endp != '\0' || ttl < 0) {
+			cd->log(ISC_LOG_ERROR, "Filesystem driver "
+					       "ttl must be a positive number");
+		}
+
+		/* pass data back to Bind */
+		if (dir_list == NULL) {
+			result = cd->putrr((dns_sdlzlookup_t *)passback, type,
+					   ttl, data);
+		} else {
+			result = cd->putnamedrr((dns_sdlzallnodes_t *)passback,
+						(char *)host, type, ttl, data);
+		}
+
+		/* if error, return error right away */
+		if (result != ISC_R_SUCCESS) {
+			return (result);
+		}
+	} /* end of while loop */
+
+	return (result);
+}
+
+/*
+ * DLZ methods
+ */
+isc_result_t
+dlz_allowzonexfr(void *dbdata, const char *name, const char *client) {
+	isc_result_t result;
+	char *path;
+	struct stat sb;
+	config_data_t *cd;
+	path = NULL;
+
+	cd = (config_data_t *)dbdata;
+
+	if (create_path(name, NULL, client, cd, &path) != ISC_R_SUCCESS) {
+		return (ISC_R_NOTFOUND);
+	}
+
+	if (stat(path, &sb) != 0) {
+		result = ISC_R_NOTFOUND;
+		goto complete_AXFR;
+	}
+
+	if ((sb.st_mode & S_IFREG) != 0) {
+		result = ISC_R_SUCCESS;
+		goto complete_AXFR;
+	}
+
+	result = ISC_R_NOTFOUND;
+
+complete_AXFR:
+	free(path);
+	return (result);
+}
+
+isc_result_t
+dlz_allnodes(const char *zone, void *dbdata, dns_sdlzallnodes_t *allnodes) {
+	isc_result_t result;
+	dlist_t *dir_list;
+	config_data_t *cd = (config_data_t *)dbdata;
+	char *basepath;
+	unsigned int basepathlen;
+	struct stat sb;
+	dir_t dir;
+	dir_entry_t *dir_entry;
+	dir_entry_t *next_de;
+
+	basepath = NULL;
+
+	/* allocate memory for list */
+	dir_list = malloc(sizeof(dlist_t));
+	if (dir_list == NULL) {
+		result = ISC_R_NOTFOUND;
+		goto complete_allnds;
+	}
+
+	/* initialize list */
+	DLZ_LIST_INIT(*dir_list);
+
+	if (create_path(zone, NULL, NULL, cd, &basepath) != ISC_R_SUCCESS) {
+		result = ISC_R_NOTFOUND;
+		goto complete_allnds;
+	}
+
+	/* remove path separator at end of path so stat works properly */
+	basepathlen = strlen(basepath);
+
+	if (stat(basepath, &sb) != 0) {
+		result = ISC_R_NOTFOUND;
+		goto complete_allnds;
+	}
+
+	if ((sb.st_mode & S_IFDIR) == 0) {
+		result = ISC_R_NOTFOUND;
+		goto complete_allnds;
+	}
+
+	/* initialize and open directory */
+	dir_init(&dir);
+	result = dir_open(&dir, basepath);
+
+	/* if directory open failed, return error. */
+	if (result != ISC_R_SUCCESS) {
+		cd->log(ISC_LOG_ERROR,
+			"Unable to open %s directory to read entries.",
+			basepath);
+		result = ISC_R_FAILURE;
+		goto complete_allnds;
+	}
+
+	/* process the directory */
+	result = process_dir(&dir, allnodes, cd, dir_list, basepathlen);
+
+	/* close the directory */
+	dir_close(&dir);
+
+	if (result != ISC_R_SUCCESS) {
+		goto complete_allnds;
+	}
+
+	/* get first dir entry from list. */
+	dir_entry = DLZ_LIST_HEAD(*dir_list);
+	while (dir_entry != NULL) {
+		result = dir_open(&dir, dir_entry->dirpath);
+		/* if directory open failed, return error. */
+		if (result != ISC_R_SUCCESS) {
+			cd->log(ISC_LOG_ERROR,
+				"Unable to open %s "
+				"directory to read entries.",
+				basepath);
+			result = ISC_R_FAILURE;
+			goto complete_allnds;
+		}
+
+		/* process the directory */
+		result = process_dir(&dir, allnodes, cd, dir_list, basepathlen);
+
+		/* close the directory */
+		dir_close(&dir);
+
+		if (result != ISC_R_SUCCESS) {
+			goto complete_allnds;
+		}
+
+		dir_entry = DLZ_LIST_NEXT(dir_entry, link);
+	} /* end while */
+
+complete_allnds:
+	if (dir_list != NULL) {
+		/* clean up entries from list. */
+		dir_entry = DLZ_LIST_HEAD(*dir_list);
+		while (dir_entry != NULL) {
+			next_de = DLZ_LIST_NEXT(dir_entry, link);
+			free(dir_entry);
+			dir_entry = next_de;
+		} /* end while */
+		free(dir_list);
+	}
+
+	if (basepath != NULL) {
+		free(basepath);
+	}
+
+	return (result);
+}
+
+#if DLZ_DLOPEN_VERSION < 3
+isc_result_t
+dlz_findzonedb(void *dbdata, const char *name)
+#else  /* if DLZ_DLOPEN_VERSION < 3 */
+isc_result_t
+dlz_findzonedb(void *dbdata, const char *name, dns_clientinfomethods_t *methods,
+	       dns_clientinfo_t *clientinfo)
+#endif /* if DLZ_DLOPEN_VERSION < 3 */
+{
+	isc_result_t result;
+	config_data_t *cd = (config_data_t *)dbdata;
+	char *path;
+	struct stat sb;
+	path = NULL;
+
+#if DLZ_DLOPEN_VERSION >= 3
+	UNUSED(methods);
+	UNUSED(clientinfo);
+#endif /* if DLZ_DLOPEN_VERSION >= 3 */
+
+	if (create_path(name, NULL, NULL, cd, &path) != ISC_R_SUCCESS) {
+		return (ISC_R_NOTFOUND);
+	}
+
+	cd->log(ISC_LOG_DEBUG(1),
+		"Filesystem driver Findzone() Checking for path: '%s'\n", path);
+
+	if (stat(path, &sb) != 0) {
+		result = ISC_R_NOTFOUND;
+		goto complete_FZ;
+	}
+
+	if ((sb.st_mode & S_IFDIR) != 0) {
+		result = ISC_R_SUCCESS;
+		goto complete_FZ;
+	}
+
+	result = ISC_R_NOTFOUND;
+
+complete_FZ:
+
+	free(path);
+	return (result);
+}
+
+#if DLZ_DLOPEN_VERSION == 1
+isc_result_t
+dlz_lookup(const char *zone, const char *name, void *dbdata,
+	   dns_sdlzlookup_t *lookup)
+#else  /* if DLZ_DLOPEN_VERSION == 1 */
+isc_result_t
+dlz_lookup(const char *zone, const char *name, void *dbdata,
+	   dns_sdlzlookup_t *lookup, dns_clientinfomethods_t *methods,
+	   dns_clientinfo_t *clientinfo)
+#endif /* if DLZ_DLOPEN_VERSION == 1 */
+{
+	isc_result_t result = ISC_R_NOTFOUND;
+	config_data_t *cd = (config_data_t *)dbdata;
+	char *path;
+	struct stat sb;
+	dir_t dir;
+	path = NULL;
+
+	UNUSED(lookup);
+#if DLZ_DLOPEN_VERSION >= 2
+	UNUSED(methods);
+	UNUSED(clientinfo);
+#endif /* if DLZ_DLOPEN_VERSION >= 2 */
+
+	if (strcmp(name, "*") == 0) {
+		/*
+		 * handle filesystem's special wildcard "-"
+		 */
+		result = create_path(zone, "-", NULL, cd, &path);
+	} else {
+		result = create_path(zone, name, NULL, cd, &path);
+	}
+
+	if (result != ISC_R_SUCCESS) {
+		return (ISC_R_NOTFOUND);
+	}
+
+	/* remove path separator at end of path so stat works properly */
+	path[strlen(path) - 1] = '\0';
+
+	cd->log(ISC_LOG_DEBUG(1),
+		"Filesystem driver lookup() Checking for path: '%s'\n", path);
+
+	if (stat(path, &sb) != 0) {
+		result = ISC_R_NOTFOUND;
+		goto complete_lkup;
+	}
+
+	if ((sb.st_mode & S_IFDIR) == 0) {
+		result = ISC_R_NOTFOUND;
+		goto complete_lkup;
+	}
+
+	/* initialize and open directory */
+	dir_init(&dir);
+	result = dir_open(&dir, path);
+
+	/* if directory open failed, return error. */
+	if (result != ISC_R_SUCCESS) {
+		cd->log(ISC_LOG_ERROR,
+			"Unable to open %s directory to read entries.", path);
+		result = ISC_R_FAILURE;
+		goto complete_lkup;
+	}
+
+	/* process any records in the directory */
+	result = process_dir(&dir, lookup, cd, NULL, 0);
+
+	/* close the directory */
+	dir_close(&dir);
+
+complete_lkup:
+
+	free(path);
+	return (result);
+}
+
+isc_result_t
+dlz_create(const char *dlzname, unsigned int argc, char *argv[], void **dbdata,
+	   ...) {
+	isc_result_t result = ISC_R_NOMEMORY;
+	config_data_t *cd;
+	char *endp;
+	int len;
+	char pathsep;
+	const char *helper_name;
+	va_list ap;
+
+	UNUSED(dlzname);
+
+	/* allocate memory for our config data and helper functions */
+	cd = calloc(1, sizeof(config_data_t));
+	if (cd == NULL) {
+		goto no_mem;
+	}
+
+	/* zero the memory */
+	memset(cd, 0, sizeof(config_data_t));
+
+	/* Fill in the helper functions */
+	va_start(ap, dbdata);
+	while ((helper_name = va_arg(ap, const char *)) != NULL) {
+		b9_add_helper(cd, helper_name, va_arg(ap, void *));
+	}
+	va_end(ap);
+
+	/* we require 5 command line args. */
+	if (argc != 6) {
+		cd->log(ISC_LOG_ERROR, "Filesystem driver requires "
+				       "6 command line args.");
+		result = ISC_R_FAILURE;
+		goto free_cd;
+	}
+
+	if (strlen(argv[5]) > 1) {
+		cd->log(ISC_LOG_ERROR, "Filesystem driver can only "
+				       "accept a single character for "
+				       "separator.");
+		result = ISC_R_FAILURE;
+		goto free_cd;
+	}
+
+	/* verify base dir ends with '/' or '\' */
+	len = strlen(argv[1]);
+	if (argv[1][len - 1] != '\\' && argv[1][len - 1] != '/') {
+		cd->log(ISC_LOG_ERROR,
+			"Base dir parameter for filesystem driver "
+			"should end with %s",
+			"either '/' or '\\' ");
+		result = ISC_R_FAILURE;
+		goto free_cd;
+	}
+
+	/* determine and save path separator for later */
+	if (argv[1][len - 1] == '\\') {
+		pathsep = '\\';
+	} else {
+		pathsep = '/';
+	}
+
+	cd->pathsep = pathsep;
+
+	/* get and store our base directory */
+	cd->basedir = strdup(argv[1]);
+	if (cd->basedir == NULL) {
+		goto no_mem;
+	}
+	cd->basedirsize = strlen(cd->basedir);
+
+	/* get and store our data sub-dir */
+	cd->datadir = strdup(argv[2]);
+	if (cd->datadir == NULL) {
+		goto no_mem;
+	}
+	cd->datadirsize = strlen(cd->datadir);
+
+	/* get and store our zone xfr sub-dir */
+	cd->xfrdir = strdup(argv[3]);
+	if (cd->xfrdir == NULL) {
+		goto no_mem;
+	}
+	cd->xfrdirsize = strlen(cd->xfrdir);
+
+	/* get and store our directory split count */
+	cd->splitcnt = strtol(argv[4], &endp, 10);
+	if (*endp != '\0' || cd->splitcnt < 0) {
+		cd->log(ISC_LOG_ERROR, "Directory split count must be zero (0) "
+				       "or a positive number");
+	}
+
+	/* get and store our separator character */
+	cd->separator = *argv[5];
+
+	/* pass back config data */
+	*dbdata = cd;
+
+	/* return success */
+	return (ISC_R_SUCCESS);
+
+	/* handle no memory error */
+no_mem:
+
+	/* write error message */
+	if (cd != NULL && cd->log != NULL) {
+		cd->log(ISC_LOG_ERROR, "filesystem_dynamic: Filesystem driver "
+				       "unable to "
+				       "allocate memory for config data.");
+	}
+
+free_cd:
+	/* if we allocated a config data object clean it up */
+	if (cd != NULL) {
+		dlz_destroy(cd);
+	}
+
+	/* return error */
+	return (result);
+}
+
+void
+dlz_destroy(void *dbdata) {
+	config_data_t *cd;
+
+	cd = (config_data_t *)dbdata;
+
+	/*
+	 * free memory for each section of config data that was
+	 * allocated
+	 */
+	if (cd->basedir != NULL) {
+		free(cd->basedir);
+	}
+
+	if (cd->datadir != NULL) {
+		free(cd->datadir);
+	}
+
+	if (cd->xfrdir != NULL) {
+		free(cd->xfrdir);
+	}
+
+	/* free config data memory */
+	free(cd);
+}
+
+/*
+ * Return the version of the API
+ */
+int
+dlz_version(unsigned int *flags) {
+	UNUSED(flags);
+	return (DLZ_DLOPEN_VERSION);
+}
+
+/*
+ * Register a helper function from the bind9 dlz_dlopen driver
+ */
+static void
+b9_add_helper(struct config_data *cd, const char *helper_name, void *ptr) {
+	if (strcmp(helper_name, "log") == 0) {
+		cd->log = (log_t *)ptr;
+	}
+	if (strcmp(helper_name, "putrr") == 0) {
+		cd->putrr = (dns_sdlz_putrr_t *)ptr;
+	}
+	if (strcmp(helper_name, "putnamedrr") == 0) {
+		cd->putnamedrr = (dns_sdlz_putnamedrr_t *)ptr;
+	}
+	if (strcmp(helper_name, "writeable_zone") == 0) {
+		cd->writeable_zone = (dns_dlz_writeablezone_t *)ptr;
+	}
+}