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-rw-r--r--common/soa.c77
-rw-r--r--common/soa.h6
-rw-r--r--common/strset.c276
-rw-r--r--common/strset.h75
4 files changed, 434 insertions, 0 deletions
diff --git a/common/soa.c b/common/soa.c
new file mode 100644
index 0000000..c2bbcc4
--- /dev/null
+++ b/common/soa.c
@@ -0,0 +1,77 @@
+
+#include "soa.h"
+
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+
+#define SEPARATORS " \t\n\v()"
+
+int
+soa_serial_increment (const char *old_soa, char *new_soa, unsigned int new_len)
+{
+ unsigned long value;
+ const char *p, *beg;
+ char *end;
+ unsigned int len;
+
+ assert (old_soa);
+ assert (new_soa);
+
+ /* Check that we can add a digit */
+ len = strlen (old_soa);
+ assert (new_len >= len + 2);
+
+ p = old_soa;
+
+ /* Eat up space at the beginning */
+ while (*p && strchr (SEPARATORS, *p))
+ ++p;
+ /* Skip over domain name, to next sep */
+ while (*p && !strchr (SEPARATORS, *p))
+ ++p;
+ /* Eat up space between */
+ while (*p && strchr (SEPARATORS, *p))
+ ++p;
+ /* Skip over administrator email, to next sep */
+ while (*p && !strchr (SEPARATORS, *p))
+ ++p;
+ /* Eat up spaces between */
+ while (*p && strchr (SEPARATORS, *p))
+ ++p;
+
+ if (*p == 0 || !isdigit (*p)) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ /* Parse the integer here */
+ beg = p;
+ value = strtoul (beg, &end, 10);
+ if (beg == end || !strchr (SEPARATORS, *end)) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ /* Increment the integer appropriately */
+ if (value == 0xFFFFFFFF)
+ value = 1; /* Zero is recommended against in RFC 1982 */
+ else
+ ++value;
+
+ /* Build up the new SOA */
+ memset (new_soa, 0, new_len);
+ len = beg - old_soa;
+ strncpy (new_soa, old_soa, len);
+ snprintf (new_soa + len, 32, "%lu", value);
+ len = strlen (new_soa);
+ strcpy (new_soa + len, end);
+
+ len = strlen (new_soa);
+ assert (len < new_len);
+
+ return len;
+}
diff --git a/common/soa.h b/common/soa.h
new file mode 100644
index 0000000..ca842e3
--- /dev/null
+++ b/common/soa.h
@@ -0,0 +1,6 @@
+#ifndef SOA_H_
+#define SOA_H_
+
+int soa_serial_increment (const char *old_soa, char *new_soa, unsigned int new_len);
+
+#endif /*SOA_H_*/
diff --git a/common/strset.c b/common/strset.c
new file mode 100644
index 0000000..801a358
--- /dev/null
+++ b/common/strset.c
@@ -0,0 +1,276 @@
+/*
+ * Copyright (c) 2008, Stefan Walter
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the
+ * following disclaimer.
+ * * Redistributions in binary form must reproduce the
+ * above copyright notice, this list of conditions and
+ * the following disclaimer in the documentation and/or
+ * other materials provided with the distribution.
+ * * The names of contributors to this software may not be
+ * used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ */
+
+/*
+ * Originally from apache 2.0
+ */
+
+/* Copyright 2000-2004 The Apache Software Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <sys/types.h>
+#include <string.h>
+#include <assert.h>
+#include <stdlib.h>
+
+#include "strset.h"
+
+typedef struct _entry {
+ struct _entry* next;
+ unsigned int hash;
+ char *value;
+} entry;
+
+struct _strset {
+ entry **array;
+ unsigned int count;
+ unsigned int max;
+};
+
+#define INITIAL_MAX 15 /* tunable == 2^n - 1 */
+
+static entry**
+alloc_array (unsigned int max)
+{
+ void *ret;
+ size_t len;
+
+ assert (max);
+
+ len = sizeof (entry*) * (max + 1);
+ ret = strset_malloc (len);
+ if (ret)
+ memset (ret, 0, len);
+
+ return ret;
+}
+
+strset*
+strset_create (void)
+{
+ strset *set = strset_malloc (sizeof (strset));
+ if (set) {
+ memset (set, 0, sizeof (strset));
+ set->max = INITIAL_MAX;
+ set->array = alloc_array (set->max);
+ if (!set->array) {
+ strset_free (set);
+ set = NULL;
+ }
+ }
+
+ return set;
+}
+
+void
+strset_destroy (strset *set)
+{
+ unsigned int i;
+ entry *ent, *next;
+
+ if (!set)
+ return;
+
+ /* Free all the entries */
+ for (i = 0; i < set->max; ++i) {
+ next = NULL;
+ for (ent = set->array[i]; ent; ent = next) {
+ next = ent->next;
+
+ assert (ent->value);
+ strset_free (ent);
+ }
+ }
+
+ /* Free the set itself */
+ strset_free (set->array);
+ strset_free (set);
+}
+
+static int
+expand_array (strset* set)
+{
+ entry** new_array;
+ entry* ent, *next;
+ unsigned int new_max, n, i;
+
+ assert (set);
+ assert (set->max);
+ assert (set->array);
+
+ new_max = set->max * 2 + 1;
+ new_array = alloc_array (new_max);
+
+ if(!new_array)
+ return 0;
+
+ /* Go through all the entries */
+ for (i = 0; i < set->max; ++i) {
+ next = NULL;
+ for (ent = set->array[i]; ent; ent = next) {
+ next = ent->next;
+
+ n = ent->hash & new_max;
+ ent->next = new_array[n];
+ new_array[n] = ent;
+ }
+ }
+
+ strset_free (set->array);
+ set->array = new_array;
+ set->max = new_max;
+
+ return 1;
+}
+
+static entry**
+find_entry (strset* set, const char *value, int add)
+{
+ entry **ep, *e;
+ const char* p;
+ unsigned int hash;
+ size_t len;
+
+ assert (set);
+ assert (set->max);
+ assert (set->array);
+ assert (value);
+
+ hash = 0;
+
+ for(p = value; *p; p++)
+ hash = hash * 33 + *p;
+
+ /* scan linked list */
+ for (ep = &set->array[hash & set->max], e = *ep;
+ e; ep = &e->next, e = *ep)
+ {
+ if (e->hash == hash && strcmp (e->value, value) == 0)
+ break;
+ }
+
+ if (e || !add)
+ return ep;
+
+ /* Add an entry */
+ len = strlen (value);
+ e = strset_malloc (sizeof (entry) + len + 1);
+ if (e) {
+ /* Value data points past end of entry */
+ e->value = ((char*)e) + sizeof (entry);
+ memcpy (e->value, value, len + 1);
+
+ e->next = NULL;
+ e->hash = hash;
+
+ *ep = e;
+ ++set->count;
+ }
+
+ return ep;
+}
+
+int
+strset_has (strset *set, const char *value)
+{
+ entry **ep;
+
+ assert (set);
+
+ if (!value)
+ return 0;
+
+ ep = find_entry (set, value, 0);
+ return ep && *ep ? 1 : 0;
+}
+
+int
+strset_add (strset *set, const char *value)
+{
+ entry **ep;
+
+ assert (set);
+
+ if (!value)
+ return -1;
+
+ ep = find_entry (set, value, 1);
+ if (!ep || !*ep)
+ return -1;
+
+ if (set->count > set->max)
+ if (!expand_array (set))
+ return -1;
+
+ return 0;
+}
+
+int
+strset_remove (strset *set, const char* value)
+{
+ entry **ep, *old;
+
+ assert (set);
+
+ if (!value)
+ return -1;
+
+ ep = find_entry (set, value, 0);
+ if (!ep || !*ep)
+ return -1;
+
+ old = *ep;
+ *ep = (*ep)->next;
+ --set->count;
+ strset_free (old);
+ return 0;
+}
+
+unsigned int
+strset_size (strset *set)
+{
+ assert (set);
+ return set->count;
+}
diff --git a/common/strset.h b/common/strset.h
new file mode 100644
index 0000000..627856b
--- /dev/null
+++ b/common/strset.h
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2008, Stefan Walter
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the
+ * following disclaimer.
+ * * Redistributions in binary form must reproduce the
+ * above copyright notice, this list of conditions and
+ * the following disclaimer in the documentation and/or
+ * other materials provided with the distribution.
+ * * The names of contributors to this software may not be
+ * used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ */
+
+/*
+ * Originally from apache 2.0
+ */
+
+/* Copyright 2000-2004 The Apache Software Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __STRSET_H__
+#define __STRSET_H__
+
+/* Abstract type for hash tables. */
+typedef struct _strset strset;
+
+strset* strset_create (void);
+void strset_destroy (strset *set);
+unsigned int strset_size (strset *set);
+int strset_has (strset *set, const char *value);
+int strset_add (strset *set, const char *value);
+int strset_remove (strset *set, const char *value);
+
+/* Need to rebuild strset.c if you set this variable */
+#if STRSET_CUSTMEM
+extern void* strset_malloc (size_t length);
+extern void strset_free (void *ptr);
+#else
+#define strset_malloc(x) malloc(x)
+#define strset_free(x) free(x)
+#endif
+
+#endif /* __STRSET_H__ */
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