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-rw-r--r--lib/isccc/Makefile.am38
-rw-r--r--lib/isccc/Makefile.in956
-rw-r--r--lib/isccc/alist.c320
-rw-r--r--lib/isccc/base64.c74
-rw-r--r--lib/isccc/cc.c1057
-rw-r--r--lib/isccc/ccmsg.c185
-rw-r--r--lib/isccc/include/isccc/alist.h86
-rw-r--r--lib/isccc/include/isccc/base64.h79
-rw-r--r--lib/isccc/include/isccc/cc.h131
-rw-r--r--lib/isccc/include/isccc/ccmsg.h137
-rw-r--r--lib/isccc/include/isccc/events.h43
-rw-r--r--lib/isccc/include/isccc/sexpr.h119
-rw-r--r--lib/isccc/include/isccc/symtab.h133
-rw-r--r--lib/isccc/include/isccc/symtype.h37
-rw-r--r--lib/isccc/include/isccc/types.h52
-rw-r--r--lib/isccc/include/isccc/util.h208
-rw-r--r--lib/isccc/sexpr.c317
-rw-r--r--lib/isccc/symtab.c293
18 files changed, 4265 insertions, 0 deletions
diff --git a/lib/isccc/Makefile.am b/lib/isccc/Makefile.am
new file mode 100644
index 0000000..7877bfb
--- /dev/null
+++ b/lib/isccc/Makefile.am
@@ -0,0 +1,38 @@
+include $(top_srcdir)/Makefile.top
+
+lib_LTLIBRARIES = libisccc.la
+
+libisccc_ladir = $(includedir)/isccc
+libisccc_la_HEADERS = \
+ include/isccc/alist.h \
+ include/isccc/base64.h \
+ include/isccc/cc.h \
+ include/isccc/ccmsg.h \
+ include/isccc/events.h \
+ include/isccc/sexpr.h \
+ include/isccc/symtab.h \
+ include/isccc/symtype.h \
+ include/isccc/types.h \
+ include/isccc/util.h
+
+libisccc_la_SOURCES = \
+ $(libisccc_la_HEADERS) \
+ alist.c \
+ base64.c \
+ cc.c \
+ ccmsg.c \
+ sexpr.c \
+ symtab.c
+
+libisccc_la_CPPFLAGS = \
+ $(AM_CPPFLAGS) \
+ $(LIBISC_CFLAGS) \
+ $(LIBDNS_CFLAGS) \
+ $(LIBISCCC_CFLAGS)
+
+libisccc_la_LIBADD = \
+ $(LIBISC_LIBS)
+
+libisccc_la_LDFLAGS = \
+ $(AM_LDFLAGS) \
+ -release "$(PACKAGE_VERSION)"
diff --git a/lib/isccc/Makefile.in b/lib/isccc/Makefile.in
new file mode 100644
index 0000000..3fee7ca
--- /dev/null
+++ b/lib/isccc/Makefile.in
@@ -0,0 +1,956 @@
+# Makefile.in generated by automake 1.16.5 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
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+distclean-generic:
+ -test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+ -test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+ @echo "This command is intended for maintainers to use"
+ @echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libLTLIBRARIES clean-libtool \
+ mostlyclean-am
+
+distclean: distclean-am
+ -rm -f ./$(DEPDIR)/libisccc_la-alist.Plo
+ -rm -f ./$(DEPDIR)/libisccc_la-base64.Plo
+ -rm -f ./$(DEPDIR)/libisccc_la-cc.Plo
+ -rm -f ./$(DEPDIR)/libisccc_la-ccmsg.Plo
+ -rm -f ./$(DEPDIR)/libisccc_la-sexpr.Plo
+ -rm -f ./$(DEPDIR)/libisccc_la-symtab.Plo
+ -rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+ distclean-tags
+
+doc: doc-am
+
+doc-am: doc-local
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-libisccc_laHEADERS
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-libLTLIBRARIES
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+ -rm -f ./$(DEPDIR)/libisccc_la-alist.Plo
+ -rm -f ./$(DEPDIR)/libisccc_la-base64.Plo
+ -rm -f ./$(DEPDIR)/libisccc_la-cc.Plo
+ -rm -f ./$(DEPDIR)/libisccc_la-ccmsg.Plo
+ -rm -f ./$(DEPDIR)/libisccc_la-sexpr.Plo
+ -rm -f ./$(DEPDIR)/libisccc_la-symtab.Plo
+ -rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+ mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+test: test-am
+
+test-am: test-local
+
+uninstall-am: uninstall-libLTLIBRARIES uninstall-libisccc_laHEADERS
+
+unit: unit-am
+
+unit-am: unit-local
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+ clean-generic clean-libLTLIBRARIES clean-libtool cscopelist-am \
+ ctags ctags-am distclean distclean-compile distclean-generic \
+ distclean-libtool distclean-tags distdir doc-am doc-local dvi \
+ dvi-am html html-am info info-am install install-am \
+ install-data install-data-am install-dvi install-dvi-am \
+ install-exec install-exec-am install-html install-html-am \
+ install-info install-info-am install-libLTLIBRARIES \
+ install-libisccc_laHEADERS install-man install-pdf \
+ install-pdf-am install-ps install-ps-am install-strip \
+ installcheck installcheck-am installdirs maintainer-clean \
+ maintainer-clean-generic mostlyclean mostlyclean-compile \
+ mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+ tags tags-am test-am test-local uninstall uninstall-am \
+ uninstall-libLTLIBRARIES uninstall-libisccc_laHEADERS unit-am \
+ unit-local
+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/lib/isccc/alist.c b/lib/isccc/alist.c
new file mode 100644
index 0000000..182ada0
--- /dev/null
+++ b/lib/isccc/alist.c
@@ -0,0 +1,320 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+/*! \file */
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <isc/assertions.h>
+#include <isc/print.h>
+#include <isc/result.h>
+
+#include <isccc/alist.h>
+#include <isccc/sexpr.h>
+#include <isccc/util.h>
+
+#define CAR(s) (s)->value.as_dottedpair.car
+#define CDR(s) (s)->value.as_dottedpair.cdr
+
+#define ALIST_TAG "*alist*"
+#define MAX_INDENT 64
+
+static char spaces[MAX_INDENT + 1] = " "
+ " ";
+
+isccc_sexpr_t *
+isccc_alist_create(void) {
+ isccc_sexpr_t *alist, *tag;
+
+ tag = isccc_sexpr_fromstring(ALIST_TAG);
+ if (tag == NULL) {
+ return (NULL);
+ }
+ alist = isccc_sexpr_cons(tag, NULL);
+ if (alist == NULL) {
+ isccc_sexpr_free(&tag);
+ return (NULL);
+ }
+
+ return (alist);
+}
+
+bool
+isccc_alist_alistp(isccc_sexpr_t *alist) {
+ isccc_sexpr_t *car;
+
+ if (alist == NULL || alist->type != ISCCC_SEXPRTYPE_DOTTEDPAIR) {
+ return (false);
+ }
+ car = CAR(alist);
+ if (car == NULL || car->type != ISCCC_SEXPRTYPE_STRING) {
+ return (false);
+ }
+ if (strcmp(car->value.as_string, ALIST_TAG) != 0) {
+ return (false);
+ }
+ return (true);
+}
+
+bool
+isccc_alist_emptyp(isccc_sexpr_t *alist) {
+ REQUIRE(isccc_alist_alistp(alist));
+
+ if (CDR(alist) == NULL) {
+ return (true);
+ }
+ return (false);
+}
+
+isccc_sexpr_t *
+isccc_alist_first(isccc_sexpr_t *alist) {
+ REQUIRE(isccc_alist_alistp(alist));
+
+ return (CDR(alist));
+}
+
+isccc_sexpr_t *
+isccc_alist_assq(isccc_sexpr_t *alist, const char *key) {
+ isccc_sexpr_t *car, *caar;
+
+ REQUIRE(isccc_alist_alistp(alist));
+
+ /*
+ * Skip alist type tag.
+ */
+ alist = CDR(alist);
+
+ while (alist != NULL) {
+ INSIST(alist->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
+ car = CAR(alist);
+ INSIST(car->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
+ caar = CAR(car);
+ if (caar->type == ISCCC_SEXPRTYPE_STRING &&
+ strcmp(caar->value.as_string, key) == 0)
+ {
+ return (car);
+ }
+ alist = CDR(alist);
+ }
+
+ return (NULL);
+}
+
+void
+isccc_alist_delete(isccc_sexpr_t *alist, const char *key) {
+ isccc_sexpr_t *car, *caar, *rest, *prev;
+
+ REQUIRE(isccc_alist_alistp(alist));
+
+ prev = alist;
+ rest = CDR(alist);
+ while (rest != NULL) {
+ INSIST(rest->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
+ car = CAR(rest);
+ INSIST(car != NULL && car->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
+ caar = CAR(car);
+ if (caar->type == ISCCC_SEXPRTYPE_STRING &&
+ strcmp(caar->value.as_string, key) == 0)
+ {
+ CDR(prev) = CDR(rest);
+ CDR(rest) = NULL;
+ isccc_sexpr_free(&rest);
+ break;
+ }
+ prev = rest;
+ rest = CDR(rest);
+ }
+}
+
+isccc_sexpr_t *
+isccc_alist_define(isccc_sexpr_t *alist, const char *key,
+ isccc_sexpr_t *value) {
+ isccc_sexpr_t *kv, *k, *elt;
+
+ kv = isccc_alist_assq(alist, key);
+ if (kv == NULL) {
+ /*
+ * New association.
+ */
+ k = isccc_sexpr_fromstring(key);
+ if (k == NULL) {
+ return (NULL);
+ }
+ kv = isccc_sexpr_cons(k, value);
+ if (kv == NULL) {
+ isccc_sexpr_free(&kv);
+ return (NULL);
+ }
+ elt = isccc_sexpr_addtolist(&alist, kv);
+ if (elt == NULL) {
+ isccc_sexpr_free(&kv);
+ return (NULL);
+ }
+ } else {
+ /*
+ * We've already got an entry for this key. Replace it.
+ */
+ isccc_sexpr_free(&CDR(kv));
+ CDR(kv) = value;
+ }
+
+ return (kv);
+}
+
+isccc_sexpr_t *
+isccc_alist_definestring(isccc_sexpr_t *alist, const char *key,
+ const char *str) {
+ isccc_sexpr_t *v, *kv;
+
+ v = isccc_sexpr_fromstring(str);
+ if (v == NULL) {
+ return (NULL);
+ }
+ kv = isccc_alist_define(alist, key, v);
+ if (kv == NULL) {
+ isccc_sexpr_free(&v);
+ }
+
+ return (kv);
+}
+
+isccc_sexpr_t *
+isccc_alist_definebinary(isccc_sexpr_t *alist, const char *key,
+ isccc_region_t *r) {
+ isccc_sexpr_t *v, *kv;
+
+ v = isccc_sexpr_frombinary(r);
+ if (v == NULL) {
+ return (NULL);
+ }
+ kv = isccc_alist_define(alist, key, v);
+ if (kv == NULL) {
+ isccc_sexpr_free(&v);
+ }
+
+ return (kv);
+}
+
+isccc_sexpr_t *
+isccc_alist_lookup(isccc_sexpr_t *alist, const char *key) {
+ isccc_sexpr_t *kv;
+
+ kv = isccc_alist_assq(alist, key);
+ if (kv != NULL) {
+ return (CDR(kv));
+ }
+ return (NULL);
+}
+
+isc_result_t
+isccc_alist_lookupstring(isccc_sexpr_t *alist, const char *key, char **strp) {
+ isccc_sexpr_t *kv, *v;
+
+ kv = isccc_alist_assq(alist, key);
+ if (kv != NULL) {
+ v = CDR(kv);
+ if (isccc_sexpr_stringp(v)) {
+ if (strp != NULL) {
+ *strp = isccc_sexpr_tostring(v);
+ }
+ return (ISC_R_SUCCESS);
+ } else {
+ return (ISC_R_EXISTS);
+ }
+ }
+
+ return (ISC_R_NOTFOUND);
+}
+
+isc_result_t
+isccc_alist_lookupbinary(isccc_sexpr_t *alist, const char *key,
+ isccc_region_t **r) {
+ isccc_sexpr_t *kv, *v;
+
+ kv = isccc_alist_assq(alist, key);
+ if (kv != NULL) {
+ v = CDR(kv);
+ if (isccc_sexpr_binaryp(v)) {
+ if (r != NULL) {
+ *r = isccc_sexpr_tobinary(v);
+ }
+ return (ISC_R_SUCCESS);
+ } else {
+ return (ISC_R_EXISTS);
+ }
+ }
+
+ return (ISC_R_NOTFOUND);
+}
+
+void
+isccc_alist_prettyprint(isccc_sexpr_t *sexpr, unsigned int indent,
+ FILE *stream) {
+ isccc_sexpr_t *elt, *kv, *k, *v;
+
+ if (isccc_alist_alistp(sexpr)) {
+ fprintf(stream, "{\n");
+ indent += 4;
+ for (elt = isccc_alist_first(sexpr); elt != NULL;
+ elt = CDR(elt))
+ {
+ kv = CAR(elt);
+ INSIST(isccc_sexpr_listp(kv));
+ k = CAR(kv);
+ v = CDR(kv);
+ INSIST(isccc_sexpr_stringp(k));
+ fprintf(stream, "%.*s%s => ", (int)indent, spaces,
+ isccc_sexpr_tostring(k));
+ isccc_alist_prettyprint(v, indent, stream);
+ if (CDR(elt) != NULL) {
+ fprintf(stream, ",");
+ }
+ fprintf(stream, "\n");
+ }
+ indent -= 4;
+ fprintf(stream, "%.*s}", (int)indent, spaces);
+ } else if (isccc_sexpr_listp(sexpr)) {
+ fprintf(stream, "(\n");
+ indent += 4;
+ for (elt = sexpr; elt != NULL; elt = CDR(elt)) {
+ fprintf(stream, "%.*s", (int)indent, spaces);
+ isccc_alist_prettyprint(CAR(elt), indent, stream);
+ if (CDR(elt) != NULL) {
+ fprintf(stream, ",");
+ }
+ fprintf(stream, "\n");
+ }
+ indent -= 4;
+ fprintf(stream, "%.*s)", (int)indent, spaces);
+ } else {
+ isccc_sexpr_print(sexpr, stream);
+ }
+}
diff --git a/lib/isccc/base64.c b/lib/isccc/base64.c
new file mode 100644
index 0000000..fd0f381
--- /dev/null
+++ b/lib/isccc/base64.c
@@ -0,0 +1,74 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+/*! \file */
+
+#include <isc/base64.h>
+#include <isc/buffer.h>
+#include <isc/region.h>
+#include <isc/result.h>
+
+#include <isccc/base64.h>
+#include <isccc/util.h>
+
+isc_result_t
+isccc_base64_encode(isccc_region_t *source, int wordlength,
+ const char *wordbreak, isccc_region_t *target) {
+ isc_region_t sr;
+ isc_buffer_t tb;
+ isc_result_t result;
+
+ sr.base = source->rstart;
+ sr.length = (unsigned int)(source->rend - source->rstart);
+ isc_buffer_init(&tb, target->rstart,
+ (unsigned int)(target->rend - target->rstart));
+
+ result = isc_base64_totext(&sr, wordlength, wordbreak, &tb);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ source->rstart = source->rend;
+ target->rstart = isc_buffer_used(&tb);
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isccc_base64_decode(const char *cstr, isccc_region_t *target) {
+ isc_buffer_t b;
+ isc_result_t result;
+
+ isc_buffer_init(&b, target->rstart,
+ (unsigned int)(target->rend - target->rstart));
+ result = isc_base64_decodestring(cstr, &b);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ target->rstart = isc_buffer_used(&b);
+ return (ISC_R_SUCCESS);
+}
diff --git a/lib/isccc/cc.c b/lib/isccc/cc.c
new file mode 100644
index 0000000..cbd9bad
--- /dev/null
+++ b/lib/isccc/cc.c
@@ -0,0 +1,1057 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+/*! \file */
+
+#include <errno.h>
+#include <inttypes.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <isc/assertions.h>
+#include <isc/hmac.h>
+#include <isc/print.h>
+#include <isc/result.h>
+#include <isc/safe.h>
+
+#include <isccc/alist.h>
+#include <isccc/base64.h>
+#include <isccc/cc.h>
+#include <isccc/sexpr.h>
+#include <isccc/symtab.h>
+#include <isccc/symtype.h>
+#include <isccc/util.h>
+
+#define MAX_TAGS 256
+#define DUP_LIFETIME 900
+#ifndef ISCCC_MAXDEPTH
+#define ISCCC_MAXDEPTH \
+ 10 /* Big enough for rndc which just sends a string each way. */
+#endif
+
+typedef isccc_sexpr_t *sexpr_ptr;
+
+static unsigned char auth_hmd5[] = {
+ 0x05, 0x5f, 0x61, 0x75, 0x74, 0x68, /*%< len + _auth */
+ ISCCC_CCMSGTYPE_TABLE, /*%< message type */
+ 0x00, 0x00, 0x00, 0x20, /*%< length == 32 */
+ 0x04, 0x68, 0x6d, 0x64, 0x35, /*%< len + hmd5 */
+ ISCCC_CCMSGTYPE_BINARYDATA, /*%< message type */
+ 0x00, 0x00, 0x00, 0x16, /*%< length == 22 */
+ /*
+ * The base64 encoding of one of our HMAC-MD5 signatures is
+ * 22 bytes.
+ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+#define HMD5_OFFSET 21 /*%< 21 = 6 + 1 + 4 + 5 + 1 + 4 */
+#define HMD5_LENGTH 22
+
+static unsigned char auth_hsha[] = {
+ 0x05, 0x5f, 0x61, 0x75, 0x74, 0x68, /*%< len + _auth */
+ ISCCC_CCMSGTYPE_TABLE, /*%< message type */
+ 0x00, 0x00, 0x00, 0x63, /*%< length == 99 */
+ 0x04, 0x68, 0x73, 0x68, 0x61, /*%< len + hsha */
+ ISCCC_CCMSGTYPE_BINARYDATA, /*%< message type */
+ 0x00, 0x00, 0x00, 0x59, /*%< length == 89 */
+ 0x00, /*%< algorithm */
+ /*
+ * The base64 encoding of one of our HMAC-SHA* signatures is
+ * 88 bytes.
+ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00
+};
+
+#define HSHA_OFFSET 22 /*%< 21 = 6 + 1 + 4 + 5 + 1 + 4 + 1 */
+#define HSHA_LENGTH 88
+
+static isc_result_t
+table_towire(isccc_sexpr_t *alist, isc_buffer_t **buffer);
+
+static isc_result_t
+list_towire(isccc_sexpr_t *alist, isc_buffer_t **buffer);
+
+static isc_result_t
+value_towire(isccc_sexpr_t *elt, isc_buffer_t **buffer) {
+ unsigned int len;
+ isccc_region_t *vr;
+ isc_result_t result;
+
+ if (isccc_sexpr_binaryp(elt)) {
+ vr = isccc_sexpr_tobinary(elt);
+ len = REGION_SIZE(*vr);
+ result = isc_buffer_reserve(buffer, 1 + 4);
+ if (result != ISC_R_SUCCESS) {
+ return (ISC_R_NOSPACE);
+ }
+ isc_buffer_putuint8(*buffer, ISCCC_CCMSGTYPE_BINARYDATA);
+ isc_buffer_putuint32(*buffer, len);
+
+ result = isc_buffer_reserve(buffer, len);
+ if (result != ISC_R_SUCCESS) {
+ return (ISC_R_NOSPACE);
+ }
+ isc_buffer_putmem(*buffer, vr->rstart, len);
+ } else if (isccc_alist_alistp(elt)) {
+ unsigned int used;
+ isc_buffer_t b;
+
+ result = isc_buffer_reserve(buffer, 1 + 4);
+ if (result != ISC_R_SUCCESS) {
+ return (ISC_R_NOSPACE);
+ }
+ isc_buffer_putuint8(*buffer, ISCCC_CCMSGTYPE_TABLE);
+ /*
+ * Emit a placeholder length.
+ */
+ used = (*buffer)->used;
+ isc_buffer_putuint32(*buffer, 0);
+
+ /*
+ * Emit the table.
+ */
+ result = table_towire(elt, buffer);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ len = (*buffer)->used - used;
+ /*
+ * 'len' is 4 bytes too big, since it counts
+ * the placeholder length too. Adjust and
+ * emit.
+ */
+ INSIST(len >= 4U);
+ len -= 4;
+
+ isc_buffer_init(&b, (unsigned char *)(*buffer)->base + used, 4);
+ isc_buffer_putuint32(&b, len);
+ } else if (isccc_sexpr_listp(elt)) {
+ unsigned int used;
+ isc_buffer_t b;
+
+ result = isc_buffer_reserve(buffer, 1 + 4);
+ if (result != ISC_R_SUCCESS) {
+ return (ISC_R_NOSPACE);
+ }
+ isc_buffer_putuint8(*buffer, ISCCC_CCMSGTYPE_LIST);
+ /*
+ * Emit a placeholder length.
+ */
+ used = (*buffer)->used;
+ isc_buffer_putuint32(*buffer, 0);
+
+ /*
+ * Emit the list.
+ */
+ result = list_towire(elt, buffer);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ len = (*buffer)->used - used;
+ /*
+ * 'len' is 4 bytes too big, since it counts
+ * the placeholder length too. Adjust and
+ * emit.
+ */
+ INSIST(len >= 4U);
+ len -= 4;
+
+ isc_buffer_init(&b, (unsigned char *)(*buffer)->base + used, 4);
+ isc_buffer_putuint32(&b, len);
+ }
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+table_towire(isccc_sexpr_t *alist, isc_buffer_t **buffer) {
+ isccc_sexpr_t *kv, *elt, *k, *v;
+ char *ks;
+ isc_result_t result;
+ unsigned int len;
+
+ for (elt = isccc_alist_first(alist); elt != NULL;
+ elt = ISCCC_SEXPR_CDR(elt))
+ {
+ kv = ISCCC_SEXPR_CAR(elt);
+ k = ISCCC_SEXPR_CAR(kv);
+ ks = isccc_sexpr_tostring(k);
+ v = ISCCC_SEXPR_CDR(kv);
+ len = (unsigned int)strlen(ks);
+ INSIST(len <= 255U);
+ /*
+ * Emit the key name.
+ */
+ result = isc_buffer_reserve(buffer, 1 + len);
+ if (result != ISC_R_SUCCESS) {
+ return (ISC_R_NOSPACE);
+ }
+ isc_buffer_putuint8(*buffer, (uint8_t)len);
+ isc_buffer_putmem(*buffer, (const unsigned char *)ks, len);
+ /*
+ * Emit the value.
+ */
+ result = value_towire(v, buffer);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ }
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+list_towire(isccc_sexpr_t *list, isc_buffer_t **buffer) {
+ isc_result_t result;
+
+ while (list != NULL) {
+ result = value_towire(ISCCC_SEXPR_CAR(list), buffer);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ list = ISCCC_SEXPR_CDR(list);
+ }
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+sign(unsigned char *data, unsigned int length, unsigned char *hmac,
+ uint32_t algorithm, isccc_region_t *secret) {
+ const isc_md_type_t *md_type;
+ isc_result_t result;
+ isccc_region_t source, target;
+ unsigned char digest[ISC_MAX_MD_SIZE];
+ unsigned int digestlen = sizeof(digest);
+ unsigned char digestb64[HSHA_LENGTH + 4];
+
+ source.rstart = digest;
+
+ switch (algorithm) {
+ case ISCCC_ALG_HMACMD5:
+ md_type = ISC_MD_MD5;
+ break;
+ case ISCCC_ALG_HMACSHA1:
+ md_type = ISC_MD_SHA1;
+ break;
+ case ISCCC_ALG_HMACSHA224:
+ md_type = ISC_MD_SHA224;
+ break;
+ case ISCCC_ALG_HMACSHA256:
+ md_type = ISC_MD_SHA256;
+ break;
+ case ISCCC_ALG_HMACSHA384:
+ md_type = ISC_MD_SHA384;
+ break;
+ case ISCCC_ALG_HMACSHA512:
+ md_type = ISC_MD_SHA512;
+ break;
+ default:
+ return (ISC_R_NOTIMPLEMENTED);
+ }
+
+ result = isc_hmac(md_type, secret->rstart, REGION_SIZE(*secret), data,
+ length, digest, &digestlen);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ source.rend = digest + digestlen;
+
+ memset(digestb64, 0, sizeof(digestb64));
+ target.rstart = digestb64;
+ target.rend = digestb64 + sizeof(digestb64);
+ result = isccc_base64_encode(&source, 64, "", &target);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ if (algorithm == ISCCC_ALG_HMACMD5) {
+ PUT_MEM(digestb64, HMD5_LENGTH, hmac);
+ } else {
+ PUT_MEM(digestb64, HSHA_LENGTH, hmac);
+ }
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isccc_cc_towire(isccc_sexpr_t *alist, isc_buffer_t **buffer, uint32_t algorithm,
+ isccc_region_t *secret) {
+ unsigned int hmac_base, signed_base;
+ isc_result_t result;
+
+ result = isc_buffer_reserve(buffer,
+ 4 + ((algorithm == ISCCC_ALG_HMACMD5)
+ ? sizeof(auth_hmd5)
+ : sizeof(auth_hsha)));
+ if (result != ISC_R_SUCCESS) {
+ return (ISC_R_NOSPACE);
+ }
+
+ /*
+ * Emit protocol version.
+ */
+ isc_buffer_putuint32(*buffer, 1);
+
+ if (secret != NULL) {
+ /*
+ * Emit _auth section with zeroed HMAC signature.
+ * We'll replace the zeros with the real signature once
+ * we know what it is.
+ */
+ if (algorithm == ISCCC_ALG_HMACMD5) {
+ hmac_base = (*buffer)->used + HMD5_OFFSET;
+ isc_buffer_putmem(*buffer, auth_hmd5,
+ sizeof(auth_hmd5));
+ } else {
+ unsigned char *hmac_alg;
+
+ hmac_base = (*buffer)->used + HSHA_OFFSET;
+ hmac_alg = (unsigned char *)isc_buffer_used(*buffer) +
+ HSHA_OFFSET - 1;
+ isc_buffer_putmem(*buffer, auth_hsha,
+ sizeof(auth_hsha));
+ *hmac_alg = algorithm;
+ }
+ } else {
+ hmac_base = 0;
+ }
+ signed_base = (*buffer)->used;
+ /*
+ * Delete any existing _auth section so that we don't try
+ * to encode it.
+ */
+ isccc_alist_delete(alist, "_auth");
+ /*
+ * Emit the message.
+ */
+ result = table_towire(alist, buffer);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ if (secret != NULL) {
+ return (sign((unsigned char *)(*buffer)->base + signed_base,
+ (*buffer)->used - signed_base,
+ (unsigned char *)(*buffer)->base + hmac_base,
+ algorithm, secret));
+ }
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+verify(isccc_sexpr_t *alist, unsigned char *data, unsigned int length,
+ uint32_t algorithm, isccc_region_t *secret) {
+ const isc_md_type_t *md_type;
+ isccc_region_t source;
+ isccc_region_t target;
+ isc_result_t result;
+ isccc_sexpr_t *_auth, *hmac;
+ unsigned char digest[ISC_MAX_MD_SIZE];
+ unsigned int digestlen = sizeof(digest);
+ unsigned char digestb64[HSHA_LENGTH * 4];
+
+ /*
+ * Extract digest.
+ */
+ _auth = isccc_alist_lookup(alist, "_auth");
+ if (!isccc_alist_alistp(_auth)) {
+ return (ISC_R_FAILURE);
+ }
+ if (algorithm == ISCCC_ALG_HMACMD5) {
+ hmac = isccc_alist_lookup(_auth, "hmd5");
+ } else {
+ hmac = isccc_alist_lookup(_auth, "hsha");
+ }
+ if (!isccc_sexpr_binaryp(hmac)) {
+ return (ISC_R_FAILURE);
+ }
+ /*
+ * Compute digest.
+ */
+ source.rstart = digest;
+
+ switch (algorithm) {
+ case ISCCC_ALG_HMACMD5:
+ md_type = ISC_MD_MD5;
+ break;
+ case ISCCC_ALG_HMACSHA1:
+ md_type = ISC_MD_SHA1;
+ break;
+ case ISCCC_ALG_HMACSHA224:
+ md_type = ISC_MD_SHA224;
+ break;
+ case ISCCC_ALG_HMACSHA256:
+ md_type = ISC_MD_SHA256;
+ break;
+ case ISCCC_ALG_HMACSHA384:
+ md_type = ISC_MD_SHA384;
+ break;
+ case ISCCC_ALG_HMACSHA512:
+ md_type = ISC_MD_SHA512;
+ break;
+ default:
+ return (ISC_R_NOTIMPLEMENTED);
+ }
+
+ result = isc_hmac(md_type, secret->rstart, REGION_SIZE(*secret), data,
+ length, digest, &digestlen);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ source.rend = digest + digestlen;
+
+ target.rstart = digestb64;
+ target.rend = digestb64 + sizeof(digestb64);
+ memset(digestb64, 0, sizeof(digestb64));
+ result = isccc_base64_encode(&source, 64, "", &target);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ /*
+ * Verify.
+ */
+ if (algorithm == ISCCC_ALG_HMACMD5) {
+ isccc_region_t *region;
+ unsigned char *value;
+
+ region = isccc_sexpr_tobinary(hmac);
+ if ((region->rend - region->rstart) != HMD5_LENGTH) {
+ return (ISCCC_R_BADAUTH);
+ }
+ value = region->rstart;
+ if (!isc_safe_memequal(value, digestb64, HMD5_LENGTH)) {
+ return (ISCCC_R_BADAUTH);
+ }
+ } else {
+ isccc_region_t *region;
+ unsigned char *value;
+ uint32_t valalg;
+
+ region = isccc_sexpr_tobinary(hmac);
+
+ /*
+ * Note: with non-MD5 algorithms, there's an extra octet
+ * to identify which algorithm is in use.
+ */
+ if ((region->rend - region->rstart) != HSHA_LENGTH + 1) {
+ return (ISCCC_R_BADAUTH);
+ }
+ value = region->rstart;
+ GET8(valalg, value);
+ if ((valalg != algorithm) ||
+ !isc_safe_memequal(value, digestb64, HSHA_LENGTH))
+ {
+ return (ISCCC_R_BADAUTH);
+ }
+ }
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+table_fromwire(isccc_region_t *source, isccc_region_t *secret,
+ uint32_t algorithm, unsigned int depth, isccc_sexpr_t **alistp);
+
+static isc_result_t
+list_fromwire(isccc_region_t *source, unsigned int depth,
+ isccc_sexpr_t **listp);
+
+static isc_result_t
+value_fromwire(isccc_region_t *source, unsigned int depth,
+ isccc_sexpr_t **valuep) {
+ unsigned int msgtype;
+ uint32_t len;
+ isccc_sexpr_t *value;
+ isccc_region_t active;
+ isc_result_t result;
+
+ if (depth > ISCCC_MAXDEPTH) {
+ return (ISCCC_R_MAXDEPTH);
+ }
+
+ if (REGION_SIZE(*source) < 1 + 4) {
+ return (ISC_R_UNEXPECTEDEND);
+ }
+ GET8(msgtype, source->rstart);
+ GET32(len, source->rstart);
+ if (REGION_SIZE(*source) < len) {
+ return (ISC_R_UNEXPECTEDEND);
+ }
+ active.rstart = source->rstart;
+ active.rend = active.rstart + len;
+ source->rstart = active.rend;
+ if (msgtype == ISCCC_CCMSGTYPE_BINARYDATA) {
+ value = isccc_sexpr_frombinary(&active);
+ if (value != NULL) {
+ *valuep = value;
+ result = ISC_R_SUCCESS;
+ } else {
+ result = ISC_R_NOMEMORY;
+ }
+ } else if (msgtype == ISCCC_CCMSGTYPE_TABLE) {
+ result = table_fromwire(&active, NULL, 0, depth + 1, valuep);
+ } else if (msgtype == ISCCC_CCMSGTYPE_LIST) {
+ result = list_fromwire(&active, depth + 1, valuep);
+ } else {
+ result = ISCCC_R_SYNTAX;
+ }
+
+ return (result);
+}
+
+static isc_result_t
+table_fromwire(isccc_region_t *source, isccc_region_t *secret,
+ uint32_t algorithm, unsigned int depth, isccc_sexpr_t **alistp) {
+ char key[256];
+ uint32_t len;
+ isc_result_t result;
+ isccc_sexpr_t *alist, *value;
+ bool first_tag;
+ unsigned char *checksum_rstart;
+
+ REQUIRE(alistp != NULL && *alistp == NULL);
+
+ if (depth > ISCCC_MAXDEPTH) {
+ return (ISCCC_R_MAXDEPTH);
+ }
+
+ checksum_rstart = NULL;
+ first_tag = true;
+ alist = isccc_alist_create();
+ if (alist == NULL) {
+ return (ISC_R_NOMEMORY);
+ }
+
+ while (!REGION_EMPTY(*source)) {
+ GET8(len, source->rstart);
+ if (REGION_SIZE(*source) < len) {
+ result = ISC_R_UNEXPECTEDEND;
+ goto bad;
+ }
+ GET_MEM(key, len, source->rstart);
+ key[len] = '\0'; /* Ensure NUL termination. */
+ value = NULL;
+ result = value_fromwire(source, depth + 1, &value);
+ if (result != ISC_R_SUCCESS) {
+ goto bad;
+ }
+ if (isccc_alist_define(alist, key, value) == NULL) {
+ result = ISC_R_NOMEMORY;
+ goto bad;
+ }
+ if (first_tag && secret != NULL && strcmp(key, "_auth") == 0) {
+ checksum_rstart = source->rstart;
+ }
+ first_tag = false;
+ }
+
+ if (secret != NULL) {
+ if (checksum_rstart != NULL) {
+ result = verify(
+ alist, checksum_rstart,
+ (unsigned int)(source->rend - checksum_rstart),
+ algorithm, secret);
+ } else {
+ result = ISCCC_R_BADAUTH;
+ }
+ } else {
+ result = ISC_R_SUCCESS;
+ }
+
+bad:
+ if (result == ISC_R_SUCCESS) {
+ *alistp = alist;
+ } else {
+ isccc_sexpr_free(&alist);
+ }
+
+ return (result);
+}
+
+static isc_result_t
+list_fromwire(isccc_region_t *source, unsigned int depth,
+ isccc_sexpr_t **listp) {
+ isccc_sexpr_t *list, *value;
+ isc_result_t result;
+
+ if (depth > ISCCC_MAXDEPTH) {
+ return (ISCCC_R_MAXDEPTH);
+ }
+
+ list = NULL;
+ while (!REGION_EMPTY(*source)) {
+ value = NULL;
+ result = value_fromwire(source, depth + 1, &value);
+ if (result != ISC_R_SUCCESS) {
+ isccc_sexpr_free(&list);
+ return (result);
+ }
+ if (isccc_sexpr_addtolist(&list, value) == NULL) {
+ isccc_sexpr_free(&value);
+ isccc_sexpr_free(&list);
+ return (ISC_R_NOMEMORY);
+ }
+ }
+
+ *listp = list;
+
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isccc_cc_fromwire(isccc_region_t *source, isccc_sexpr_t **alistp,
+ uint32_t algorithm, isccc_region_t *secret) {
+ unsigned int size;
+ uint32_t version;
+
+ size = REGION_SIZE(*source);
+ if (size < 4) {
+ return (ISC_R_UNEXPECTEDEND);
+ }
+ GET32(version, source->rstart);
+ if (version != 1) {
+ return (ISCCC_R_UNKNOWNVERSION);
+ }
+
+ return (table_fromwire(source, secret, algorithm, 0, alistp));
+}
+
+static isc_result_t
+createmessage(uint32_t version, const char *from, const char *to,
+ uint32_t serial, isccc_time_t now, isccc_time_t expires,
+ isccc_sexpr_t **alistp, bool want_expires) {
+ isccc_sexpr_t *alist, *_ctrl, *_data;
+ isc_result_t result;
+
+ REQUIRE(alistp != NULL && *alistp == NULL);
+
+ if (version != 1) {
+ return (ISCCC_R_UNKNOWNVERSION);
+ }
+
+ alist = isccc_alist_create();
+ if (alist == NULL) {
+ return (ISC_R_NOMEMORY);
+ }
+
+ result = ISC_R_NOMEMORY;
+
+ _ctrl = isccc_alist_create();
+ if (_ctrl == NULL) {
+ goto bad;
+ }
+ if (isccc_alist_define(alist, "_ctrl", _ctrl) == NULL) {
+ isccc_sexpr_free(&_ctrl);
+ goto bad;
+ }
+
+ _data = isccc_alist_create();
+ if (_data == NULL) {
+ goto bad;
+ }
+ if (isccc_alist_define(alist, "_data", _data) == NULL) {
+ isccc_sexpr_free(&_data);
+ goto bad;
+ }
+
+ if (isccc_cc_defineuint32(_ctrl, "_ser", serial) == NULL ||
+ isccc_cc_defineuint32(_ctrl, "_tim", now) == NULL ||
+ (want_expires &&
+ isccc_cc_defineuint32(_ctrl, "_exp", expires) == NULL))
+ {
+ goto bad;
+ }
+ if (from != NULL && isccc_cc_definestring(_ctrl, "_frm", from) == NULL)
+ {
+ goto bad;
+ }
+ if (to != NULL && isccc_cc_definestring(_ctrl, "_to", to) == NULL) {
+ goto bad;
+ }
+
+ *alistp = alist;
+
+ return (ISC_R_SUCCESS);
+
+bad:
+ isccc_sexpr_free(&alist);
+
+ return (result);
+}
+
+isc_result_t
+isccc_cc_createmessage(uint32_t version, const char *from, const char *to,
+ uint32_t serial, isccc_time_t now, isccc_time_t expires,
+ isccc_sexpr_t **alistp) {
+ return (createmessage(version, from, to, serial, now, expires, alistp,
+ true));
+}
+
+isc_result_t
+isccc_cc_createack(isccc_sexpr_t *message, bool ok, isccc_sexpr_t **ackp) {
+ char *_frm, *_to;
+ uint32_t serial;
+ isccc_sexpr_t *ack, *_ctrl;
+ isc_result_t result;
+ isccc_time_t t;
+
+ REQUIRE(ackp != NULL && *ackp == NULL);
+
+ _ctrl = isccc_alist_lookup(message, "_ctrl");
+ if (!isccc_alist_alistp(_ctrl) ||
+ isccc_cc_lookupuint32(_ctrl, "_ser", &serial) != ISC_R_SUCCESS ||
+ isccc_cc_lookupuint32(_ctrl, "_tim", &t) != ISC_R_SUCCESS)
+ {
+ return (ISC_R_FAILURE);
+ }
+ /*
+ * _frm and _to are optional.
+ */
+ _frm = NULL;
+ (void)isccc_cc_lookupstring(_ctrl, "_frm", &_frm);
+ _to = NULL;
+ (void)isccc_cc_lookupstring(_ctrl, "_to", &_to);
+ /*
+ * Create the ack.
+ */
+ ack = NULL;
+ result = createmessage(1, _to, _frm, serial, t, 0, &ack, false);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ _ctrl = isccc_alist_lookup(ack, "_ctrl");
+ if (_ctrl == NULL) {
+ result = ISC_R_FAILURE;
+ goto bad;
+ }
+ if (isccc_cc_definestring(ack, "_ack", (ok) ? "1" : "0") == NULL) {
+ result = ISC_R_NOMEMORY;
+ goto bad;
+ }
+
+ *ackp = ack;
+
+ return (ISC_R_SUCCESS);
+
+bad:
+ isccc_sexpr_free(&ack);
+
+ return (result);
+}
+
+bool
+isccc_cc_isack(isccc_sexpr_t *message) {
+ isccc_sexpr_t *_ctrl;
+
+ _ctrl = isccc_alist_lookup(message, "_ctrl");
+ if (!isccc_alist_alistp(_ctrl)) {
+ return (false);
+ }
+ if (isccc_cc_lookupstring(_ctrl, "_ack", NULL) == ISC_R_SUCCESS) {
+ return (true);
+ }
+ return (false);
+}
+
+bool
+isccc_cc_isreply(isccc_sexpr_t *message) {
+ isccc_sexpr_t *_ctrl;
+
+ _ctrl = isccc_alist_lookup(message, "_ctrl");
+ if (!isccc_alist_alistp(_ctrl)) {
+ return (false);
+ }
+ if (isccc_cc_lookupstring(_ctrl, "_rpl", NULL) == ISC_R_SUCCESS) {
+ return (true);
+ }
+ return (false);
+}
+
+isc_result_t
+isccc_cc_createresponse(isccc_sexpr_t *message, isccc_time_t now,
+ isccc_time_t expires, isccc_sexpr_t **alistp) {
+ char *_frm, *_to, *type = NULL;
+ uint32_t serial;
+ isccc_sexpr_t *alist, *_ctrl, *_data;
+ isc_result_t result;
+
+ REQUIRE(alistp != NULL && *alistp == NULL);
+
+ _ctrl = isccc_alist_lookup(message, "_ctrl");
+ _data = isccc_alist_lookup(message, "_data");
+ if (!isccc_alist_alistp(_ctrl) || !isccc_alist_alistp(_data) ||
+ isccc_cc_lookupuint32(_ctrl, "_ser", &serial) != ISC_R_SUCCESS ||
+ isccc_cc_lookupstring(_data, "type", &type) != ISC_R_SUCCESS)
+ {
+ return (ISC_R_FAILURE);
+ }
+ /*
+ * _frm and _to are optional.
+ */
+ _frm = NULL;
+ (void)isccc_cc_lookupstring(_ctrl, "_frm", &_frm);
+ _to = NULL;
+ (void)isccc_cc_lookupstring(_ctrl, "_to", &_to);
+ /*
+ * Create the response.
+ */
+ alist = NULL;
+ result = isccc_cc_createmessage(1, _to, _frm, serial, now, expires,
+ &alist);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ _ctrl = isccc_alist_lookup(alist, "_ctrl");
+ if (_ctrl == NULL) {
+ result = ISC_R_FAILURE;
+ goto bad;
+ }
+
+ _data = isccc_alist_lookup(alist, "_data");
+ if (_data == NULL) {
+ result = ISC_R_FAILURE;
+ goto bad;
+ }
+
+ if (isccc_cc_definestring(_ctrl, "_rpl", "1") == NULL ||
+ isccc_cc_definestring(_data, "type", type) == NULL)
+ {
+ result = ISC_R_NOMEMORY;
+ goto bad;
+ }
+
+ *alistp = alist;
+
+ return (ISC_R_SUCCESS);
+
+bad:
+ isccc_sexpr_free(&alist);
+ return (result);
+}
+
+isccc_sexpr_t *
+isccc_cc_definestring(isccc_sexpr_t *alist, const char *key, const char *str) {
+ size_t len;
+ isccc_region_t r;
+
+ len = strlen(str);
+ DE_CONST(str, r.rstart);
+ r.rend = r.rstart + len;
+
+ return (isccc_alist_definebinary(alist, key, &r));
+}
+
+isccc_sexpr_t *
+isccc_cc_defineuint32(isccc_sexpr_t *alist, const char *key, uint32_t i) {
+ char b[100];
+ size_t len;
+ isccc_region_t r;
+
+ snprintf(b, sizeof(b), "%u", i);
+ len = strlen(b);
+ r.rstart = (unsigned char *)b;
+ r.rend = (unsigned char *)b + len;
+
+ return (isccc_alist_definebinary(alist, key, &r));
+}
+
+isc_result_t
+isccc_cc_lookupstring(isccc_sexpr_t *alist, const char *key, char **strp) {
+ isccc_sexpr_t *kv, *v;
+
+ REQUIRE(strp == NULL || *strp == NULL);
+
+ kv = isccc_alist_assq(alist, key);
+ if (kv != NULL) {
+ v = ISCCC_SEXPR_CDR(kv);
+ if (isccc_sexpr_binaryp(v)) {
+ if (strp != NULL) {
+ *strp = isccc_sexpr_tostring(v);
+ }
+ return (ISC_R_SUCCESS);
+ } else {
+ return (ISC_R_EXISTS);
+ }
+ }
+
+ return (ISC_R_NOTFOUND);
+}
+
+isc_result_t
+isccc_cc_lookupuint32(isccc_sexpr_t *alist, const char *key, uint32_t *uintp) {
+ isccc_sexpr_t *kv, *v;
+
+ kv = isccc_alist_assq(alist, key);
+ if (kv != NULL) {
+ v = ISCCC_SEXPR_CDR(kv);
+ if (isccc_sexpr_binaryp(v)) {
+ if (uintp != NULL) {
+ *uintp = (uint32_t)strtoul(
+ isccc_sexpr_tostring(v), NULL, 10);
+ }
+ return (ISC_R_SUCCESS);
+ } else {
+ return (ISC_R_EXISTS);
+ }
+ }
+
+ return (ISC_R_NOTFOUND);
+}
+
+static void
+symtab_undefine(char *key, unsigned int type, isccc_symvalue_t value,
+ void *arg) {
+ UNUSED(type);
+ UNUSED(value);
+ UNUSED(arg);
+
+ free(key);
+}
+
+static bool
+symtab_clean(char *key, unsigned int type, isccc_symvalue_t value, void *arg) {
+ isccc_time_t *now;
+
+ UNUSED(key);
+ UNUSED(type);
+
+ now = arg;
+
+ if (*now < value.as_uinteger) {
+ return (false);
+ }
+ if ((*now - value.as_uinteger) < DUP_LIFETIME) {
+ return (false);
+ }
+ return (true);
+}
+
+isc_result_t
+isccc_cc_createsymtab(isccc_symtab_t **symtabp) {
+ return (isccc_symtab_create(11897, symtab_undefine, NULL, false,
+ symtabp));
+}
+
+void
+isccc_cc_cleansymtab(isccc_symtab_t *symtab, isccc_time_t now) {
+ isccc_symtab_foreach(symtab, symtab_clean, &now);
+}
+
+static bool
+has_whitespace(const char *str) {
+ char c;
+
+ if (str == NULL) {
+ return (false);
+ }
+ while ((c = *str++) != '\0') {
+ if (c == ' ' || c == '\t' || c == '\n') {
+ return (true);
+ }
+ }
+ return (false);
+}
+
+isc_result_t
+isccc_cc_checkdup(isccc_symtab_t *symtab, isccc_sexpr_t *message,
+ isccc_time_t now) {
+ const char *_frm;
+ const char *_to;
+ char *_ser = NULL, *_tim = NULL, *tmp;
+ isc_result_t result;
+ char *key;
+ size_t len;
+ isccc_symvalue_t value;
+ isccc_sexpr_t *_ctrl;
+
+ _ctrl = isccc_alist_lookup(message, "_ctrl");
+ if (!isccc_alist_alistp(_ctrl) ||
+ isccc_cc_lookupstring(_ctrl, "_ser", &_ser) != ISC_R_SUCCESS ||
+ isccc_cc_lookupstring(_ctrl, "_tim", &_tim) != ISC_R_SUCCESS)
+ {
+ return (ISC_R_FAILURE);
+ }
+
+ INSIST(_ser != NULL);
+ INSIST(_tim != NULL);
+
+ /*
+ * _frm and _to are optional.
+ */
+ tmp = NULL;
+ if (isccc_cc_lookupstring(_ctrl, "_frm", &tmp) != ISC_R_SUCCESS) {
+ _frm = "";
+ } else {
+ _frm = tmp;
+ }
+ tmp = NULL;
+ if (isccc_cc_lookupstring(_ctrl, "_to", &tmp) != ISC_R_SUCCESS) {
+ _to = "";
+ } else {
+ _to = tmp;
+ }
+ /*
+ * Ensure there is no newline in any of the strings. This is so
+ * we can write them to a file later.
+ */
+ if (has_whitespace(_frm) || has_whitespace(_to) ||
+ has_whitespace(_ser) || has_whitespace(_tim))
+ {
+ return (ISC_R_FAILURE);
+ }
+ len = strlen(_frm) + strlen(_to) + strlen(_ser) + strlen(_tim) + 4;
+ key = malloc(len);
+ if (key == NULL) {
+ return (ISC_R_NOMEMORY);
+ }
+ snprintf(key, len, "%s;%s;%s;%s", _frm, _to, _ser, _tim);
+ value.as_uinteger = now;
+ result = isccc_symtab_define(symtab, key, ISCCC_SYMTYPE_CCDUP, value,
+ isccc_symexists_reject);
+ if (result != ISC_R_SUCCESS) {
+ free(key);
+ return (result);
+ }
+
+ return (ISC_R_SUCCESS);
+}
diff --git a/lib/isccc/ccmsg.c b/lib/isccc/ccmsg.c
new file mode 100644
index 0000000..9ee48ab
--- /dev/null
+++ b/lib/isccc/ccmsg.c
@@ -0,0 +1,185 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+/*! \file */
+
+#include <inttypes.h>
+
+#include <isc/mem.h>
+#include <isc/netmgr.h>
+#include <isc/result.h>
+#include <isc/string.h>
+#include <isc/util.h>
+
+#include <isccc/ccmsg.h>
+#include <isccc/events.h>
+
+#define CCMSG_MAGIC ISC_MAGIC('C', 'C', 'm', 's')
+#define VALID_CCMSG(foo) ISC_MAGIC_VALID(foo, CCMSG_MAGIC)
+
+static void
+recv_data(isc_nmhandle_t *handle, isc_result_t eresult, isc_region_t *region,
+ void *arg) {
+ isccc_ccmsg_t *ccmsg = arg;
+ size_t size;
+
+ INSIST(VALID_CCMSG(ccmsg));
+
+ switch (eresult) {
+ case ISC_R_SHUTTINGDOWN:
+ case ISC_R_CANCELED:
+ case ISC_R_EOF:
+ ccmsg->result = eresult;
+ goto done;
+ case ISC_R_SUCCESS:
+ if (region == NULL) {
+ ccmsg->result = ISC_R_EOF;
+ goto done;
+ }
+ ccmsg->result = ISC_R_SUCCESS;
+ break;
+ default:
+ ccmsg->result = eresult;
+ goto done;
+ }
+
+ if (!ccmsg->length_received) {
+ if (region->length < sizeof(uint32_t)) {
+ ccmsg->result = ISC_R_UNEXPECTEDEND;
+ goto done;
+ }
+
+ ccmsg->size = ntohl(*(uint32_t *)region->base);
+
+ if (ccmsg->size == 0) {
+ ccmsg->result = ISC_R_UNEXPECTEDEND;
+ goto done;
+ }
+ if (ccmsg->size > ccmsg->maxsize) {
+ ccmsg->result = ISC_R_RANGE;
+ goto done;
+ }
+
+ isc_region_consume(region, sizeof(uint32_t));
+ isc_buffer_allocate(ccmsg->mctx, &ccmsg->buffer, ccmsg->size);
+
+ ccmsg->length_received = true;
+ }
+
+ /*
+ * If there's no more data, wait for more
+ */
+ if (region->length == 0) {
+ return;
+ }
+
+ /* We have some data in the buffer, read it */
+
+ size = ISC_MIN(isc_buffer_availablelength(ccmsg->buffer),
+ region->length);
+ isc_buffer_putmem(ccmsg->buffer, region->base, size);
+ isc_region_consume(region, size);
+
+ if (isc_buffer_usedlength(ccmsg->buffer) == ccmsg->size) {
+ ccmsg->result = ISC_R_SUCCESS;
+ goto done;
+ }
+
+ /* Wait for more data to come */
+ return;
+
+done:
+ isc_nm_pauseread(handle);
+ ccmsg->cb(handle, ccmsg->result, ccmsg->cbarg);
+}
+
+void
+isccc_ccmsg_init(isc_mem_t *mctx, isc_nmhandle_t *handle,
+ isccc_ccmsg_t *ccmsg) {
+ REQUIRE(mctx != NULL);
+ REQUIRE(handle != NULL);
+ REQUIRE(ccmsg != NULL);
+
+ *ccmsg = (isccc_ccmsg_t){
+ .magic = CCMSG_MAGIC,
+ .maxsize = 0xffffffffU, /* Largest message possible. */
+ .mctx = mctx,
+ .handle = handle,
+ .result = ISC_R_UNEXPECTED /* None yet. */
+ };
+}
+
+void
+isccc_ccmsg_setmaxsize(isccc_ccmsg_t *ccmsg, unsigned int maxsize) {
+ REQUIRE(VALID_CCMSG(ccmsg));
+
+ ccmsg->maxsize = maxsize;
+}
+
+void
+isccc_ccmsg_readmessage(isccc_ccmsg_t *ccmsg, isc_nm_cb_t cb, void *cbarg) {
+ REQUIRE(VALID_CCMSG(ccmsg));
+
+ if (ccmsg->buffer != NULL) {
+ isc_buffer_free(&ccmsg->buffer);
+ }
+
+ ccmsg->cb = cb;
+ ccmsg->cbarg = cbarg;
+ ccmsg->result = ISC_R_UNEXPECTED; /* unknown right now */
+ ccmsg->length_received = false;
+
+ if (ccmsg->reading) {
+ isc_nm_resumeread(ccmsg->handle);
+ } else {
+ isc_nm_read(ccmsg->handle, recv_data, ccmsg);
+ ccmsg->reading = true;
+ }
+}
+
+void
+isccc_ccmsg_cancelread(isccc_ccmsg_t *ccmsg) {
+ REQUIRE(VALID_CCMSG(ccmsg));
+
+ if (ccmsg->reading) {
+ isc_nm_cancelread(ccmsg->handle);
+ ccmsg->reading = false;
+ }
+}
+
+void
+isccc_ccmsg_invalidate(isccc_ccmsg_t *ccmsg) {
+ REQUIRE(VALID_CCMSG(ccmsg));
+
+ ccmsg->magic = 0;
+
+ if (ccmsg->buffer != NULL) {
+ isc_buffer_free(&ccmsg->buffer);
+ }
+}
diff --git a/lib/isccc/include/isccc/alist.h b/lib/isccc/include/isccc/alist.h
new file mode 100644
index 0000000..dc70044
--- /dev/null
+++ b/lib/isccc/include/isccc/alist.h
@@ -0,0 +1,86 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+#pragma once
+
+/*! \file isccc/alist.h */
+
+#include <stdbool.h>
+#include <stdio.h>
+
+#include <isc/lang.h>
+
+#include <isccc/types.h>
+
+ISC_LANG_BEGINDECLS
+
+isccc_sexpr_t *
+isccc_alist_create(void);
+
+bool
+isccc_alist_alistp(isccc_sexpr_t *alist);
+
+bool
+isccc_alist_emptyp(isccc_sexpr_t *alist);
+
+isccc_sexpr_t *
+isccc_alist_first(isccc_sexpr_t *alist);
+
+isccc_sexpr_t *
+isccc_alist_assq(isccc_sexpr_t *alist, const char *key);
+
+void
+isccc_alist_delete(isccc_sexpr_t *alist, const char *key);
+
+isccc_sexpr_t *
+isccc_alist_define(isccc_sexpr_t *alist, const char *key, isccc_sexpr_t *value);
+
+isccc_sexpr_t *
+isccc_alist_definestring(isccc_sexpr_t *alist, const char *key,
+ const char *str);
+
+isccc_sexpr_t *
+isccc_alist_definebinary(isccc_sexpr_t *alist, const char *key,
+ isccc_region_t *r);
+
+isccc_sexpr_t *
+isccc_alist_lookup(isccc_sexpr_t *alist, const char *key);
+
+isc_result_t
+isccc_alist_lookupstring(isccc_sexpr_t *alist, const char *key, char **strp);
+
+isc_result_t
+isccc_alist_lookupbinary(isccc_sexpr_t *alist, const char *key,
+ isccc_region_t **r);
+
+void
+isccc_alist_prettyprint(isccc_sexpr_t *sexpr, unsigned int indent,
+ FILE *stream);
+
+ISC_LANG_ENDDECLS
diff --git a/lib/isccc/include/isccc/base64.h b/lib/isccc/include/isccc/base64.h
new file mode 100644
index 0000000..641dd4e
--- /dev/null
+++ b/lib/isccc/include/isccc/base64.h
@@ -0,0 +1,79 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+#pragma once
+
+/*! \file isccc/base64.h */
+
+#include <isc/lang.h>
+
+#include <isccc/types.h>
+
+ISC_LANG_BEGINDECLS
+
+/***
+ *** Functions
+ ***/
+
+isc_result_t
+isccc_base64_encode(isccc_region_t *source, int wordlength,
+ const char *wordbreak, isccc_region_t *target);
+/*%<
+ * Convert data into base64 encoded text.
+ *
+ * Notes:
+ *\li The base64 encoded text in 'target' will be divided into
+ * words of at most 'wordlength' characters, separated by
+ * the 'wordbreak' string. No parentheses will surround
+ * the text.
+ *
+ * Requires:
+ *\li 'source' is a region containing binary data.
+ *\li 'target' is a text region containing available space.
+ *\li 'wordbreak' points to a null-terminated string of
+ * zero or more whitespace characters.
+ */
+
+isc_result_t
+isccc_base64_decode(const char *cstr, isccc_region_t *target);
+/*%<
+ * Decode a null-terminated base64 string.
+ *
+ * Requires:
+ *\li 'cstr' is non-null.
+ *\li 'target' is a valid region.
+ *
+ * Returns:
+ *\li #ISC_R_SUCCESS -- the entire decoded representation of 'cstring'
+ * fit in 'target'.
+ *\li #ISC_R_BADBASE64 -- 'cstr' is not a valid base64 encoding.
+ *\li #ISC_R_NOSPACE -- 'target' is not big enough.
+ */
+
+ISC_LANG_ENDDECLS
diff --git a/lib/isccc/include/isccc/cc.h b/lib/isccc/include/isccc/cc.h
new file mode 100644
index 0000000..f597276
--- /dev/null
+++ b/lib/isccc/include/isccc/cc.h
@@ -0,0 +1,131 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+#pragma once
+
+/*! \file isccc/cc.h */
+
+#include <inttypes.h>
+#include <stdbool.h>
+
+#include <isc/buffer.h>
+#include <isc/lang.h>
+
+#include <dst/dst.h>
+#include <isccc/types.h>
+
+ISC_LANG_BEGINDECLS
+
+/*%
+ * The HMAC algorithms supported by isccc_cc_fromwire and
+ * isccc_cc_towire as implemented in DST.
+ */
+#define ISCCC_ALG_UNKNOWN 0
+#define ISCCC_ALG_HMACMD5 DST_ALG_HMACMD5
+#define ISCCC_ALG_HMACSHA1 DST_ALG_HMACSHA1
+#define ISCCC_ALG_HMACSHA224 DST_ALG_HMACSHA224
+#define ISCCC_ALG_HMACSHA256 DST_ALG_HMACSHA256
+#define ISCCC_ALG_HMACSHA384 DST_ALG_HMACSHA384
+#define ISCCC_ALG_HMACSHA512 DST_ALG_HMACSHA512
+
+/*% Maximum Datagram Package */
+#define ISCCC_CC_MAXDGRAMPACKET 4096
+
+/*% Message Type String */
+#define ISCCC_CCMSGTYPE_STRING 0x00
+/*% Message Type Binary Data */
+#define ISCCC_CCMSGTYPE_BINARYDATA 0x01
+/*% Message Type Table */
+#define ISCCC_CCMSGTYPE_TABLE 0x02
+/*% Message Type List */
+#define ISCCC_CCMSGTYPE_LIST 0x03
+
+/*% Send to Wire */
+isc_result_t
+isccc_cc_towire(isccc_sexpr_t *alist, isc_buffer_t **buffer, uint32_t algorithm,
+ isccc_region_t *secret);
+
+/*% Get From Wire */
+isc_result_t
+isccc_cc_fromwire(isccc_region_t *source, isccc_sexpr_t **alistp,
+ uint32_t algorithm, isccc_region_t *secret);
+
+/*% Create Message */
+isc_result_t
+isccc_cc_createmessage(uint32_t version, const char *from, const char *to,
+ uint32_t serial, isccc_time_t now, isccc_time_t expires,
+ isccc_sexpr_t **alistp);
+
+/*% Create Acknowledgment */
+isc_result_t
+isccc_cc_createack(isccc_sexpr_t *message, bool ok, isccc_sexpr_t **ackp);
+
+/*% Is Ack? */
+bool
+isccc_cc_isack(isccc_sexpr_t *message);
+
+/*% Is Reply? */
+bool
+isccc_cc_isreply(isccc_sexpr_t *message);
+
+/*% Create Response */
+isc_result_t
+isccc_cc_createresponse(isccc_sexpr_t *message, isccc_time_t now,
+ isccc_time_t expires, isccc_sexpr_t **alistp);
+
+/*% Define String */
+isccc_sexpr_t *
+isccc_cc_definestring(isccc_sexpr_t *alist, const char *key, const char *str);
+
+/*% Define uint 32 */
+isccc_sexpr_t *
+isccc_cc_defineuint32(isccc_sexpr_t *alist, const char *key, uint32_t i);
+
+/*% Lookup String */
+isc_result_t
+isccc_cc_lookupstring(isccc_sexpr_t *alist, const char *key, char **strp);
+
+/*% Lookup uint 32 */
+isc_result_t
+isccc_cc_lookupuint32(isccc_sexpr_t *alist, const char *key, uint32_t *uintp);
+
+/*% Create Symbol Table */
+isc_result_t
+isccc_cc_createsymtab(isccc_symtab_t **symtabp);
+
+/*% Clean up Symbol Table */
+void
+isccc_cc_cleansymtab(isccc_symtab_t *symtab, isccc_time_t now);
+
+/*% Check for Duplicates */
+isc_result_t
+isccc_cc_checkdup(isccc_symtab_t *symtab, isccc_sexpr_t *message,
+ isccc_time_t now);
+
+ISC_LANG_ENDDECLS
diff --git a/lib/isccc/include/isccc/ccmsg.h b/lib/isccc/include/isccc/ccmsg.h
new file mode 100644
index 0000000..a648226
--- /dev/null
+++ b/lib/isccc/include/isccc/ccmsg.h
@@ -0,0 +1,137 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+#pragma once
+
+/*! \file isccc/ccmsg.h */
+
+#include <inttypes.h>
+
+#include <isc/buffer.h>
+#include <isc/lang.h>
+#include <isc/netmgr.h>
+#include <isc/sockaddr.h>
+
+/*% ISCCC Message Structure */
+typedef struct isccc_ccmsg {
+ /* private (don't touch!) */
+ unsigned int magic;
+ uint32_t size;
+ bool length_received;
+ isc_buffer_t *buffer;
+ unsigned int maxsize;
+ isc_mem_t *mctx;
+ isc_nmhandle_t *handle;
+ isc_nm_cb_t cb;
+ void *cbarg;
+ bool reading;
+ /* public (read-only) */
+ isc_result_t result;
+} isccc_ccmsg_t;
+
+ISC_LANG_BEGINDECLS
+
+void
+isccc_ccmsg_init(isc_mem_t *mctx, isc_nmhandle_t *handle, isccc_ccmsg_t *ccmsg);
+/*%
+ * Associate a cc message state with a given memory context and
+ * netmgr handle. (Note that the caller must hold a reference to
+ * the handle during asynchronous ccmsg operations; the ccmsg code
+ * does not hold the reference itself.)
+ *
+ * Requires:
+ *
+ *\li "mctx" be a valid memory context.
+ *
+ *\li "handle" be a netmgr handle for a stream socket.
+ *
+ *\li "ccmsg" be non-NULL and an uninitialized or invalidated structure.
+ *
+ * Ensures:
+ *
+ *\li "ccmsg" is a valid structure.
+ */
+
+void
+isccc_ccmsg_setmaxsize(isccc_ccmsg_t *ccmsg, unsigned int maxsize);
+/*%
+ * Set the maximum packet size to "maxsize"
+ *
+ * Requires:
+ *
+ *\li "ccmsg" be valid.
+ *
+ *\li 512 <= "maxsize" <= 4294967296
+ */
+
+void
+isccc_ccmsg_readmessage(isccc_ccmsg_t *ccmsg, isc_nm_cb_t cb, void *cbarg);
+/*%
+ * Schedule an event to be delivered when a command channel message is
+ * readable, or when an error occurs on the socket.
+ *
+ * Requires:
+ *
+ *\li "ccmsg" be valid.
+ *
+ * Notes:
+ *
+ *\li The event delivered is a fully generic event. It will contain no
+ * actual data. The sender will be a pointer to the isccc_ccmsg_t.
+ * The result code inside that structure should be checked to see
+ * what the final result was.
+ */
+
+void
+isccc_ccmsg_cancelread(isccc_ccmsg_t *ccmsg);
+/*%
+ * Cancel a readmessage() call. The event will still be posted with a
+ * CANCELED result code.
+ *
+ * Requires:
+ *
+ *\li "ccmsg" be valid.
+ */
+
+void
+isccc_ccmsg_invalidate(isccc_ccmsg_t *ccmsg);
+/*%
+ * Clean up all allocated state, and invalidate the structure.
+ *
+ * Requires:
+ *
+ *\li "ccmsg" be valid.
+ *
+ * Ensures:
+ *
+ *\li "ccmsg" is invalidated and disassociated with all memory contexts,
+ * sockets, etc.
+ */
+
+ISC_LANG_ENDDECLS
diff --git a/lib/isccc/include/isccc/events.h b/lib/isccc/include/isccc/events.h
new file mode 100644
index 0000000..0461a8a
--- /dev/null
+++ b/lib/isccc/include/isccc/events.h
@@ -0,0 +1,43 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+#pragma once
+
+/*! \file isccc/events.h */
+
+#include <isc/eventclass.h>
+
+/*%
+ * Registry of ISCCC event numbers.
+ */
+
+#define ISCCC_EVENT_CCMSG (ISC_EVENTCLASS_ISCCC + 0)
+
+#define ISCCC_EVENT_FIRSTEVENT (ISC_EVENTCLASS_ISCCC + 0)
+#define ISCCC_EVENT_LASTEVENT (ISC_EVENTCLASS_ISCCC + 65535)
diff --git a/lib/isccc/include/isccc/sexpr.h b/lib/isccc/include/isccc/sexpr.h
new file mode 100644
index 0000000..133d06d
--- /dev/null
+++ b/lib/isccc/include/isccc/sexpr.h
@@ -0,0 +1,119 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+#pragma once
+
+/*! \file isccc/sexpr.h */
+
+#include <stdbool.h>
+#include <stdio.h>
+
+#include <isc/lang.h>
+
+#include <isccc/types.h>
+
+ISC_LANG_BEGINDECLS
+
+/*% dotted pair structure */
+struct isccc_dottedpair {
+ isccc_sexpr_t *car;
+ isccc_sexpr_t *cdr;
+};
+
+/*% iscc_sexpr structure */
+struct isccc_sexpr {
+ unsigned int type;
+ union {
+ char *as_string;
+ isccc_dottedpair_t as_dottedpair;
+ isccc_region_t as_region;
+ } value;
+};
+
+#define ISCCC_SEXPRTYPE_NONE 0x00 /*%< Illegal. */
+#define ISCCC_SEXPRTYPE_T 0x01
+#define ISCCC_SEXPRTYPE_STRING 0x02
+#define ISCCC_SEXPRTYPE_DOTTEDPAIR 0x03
+#define ISCCC_SEXPRTYPE_BINARY 0x04
+
+#define ISCCC_SEXPR_CAR(s) (s)->value.as_dottedpair.car
+#define ISCCC_SEXPR_CDR(s) (s)->value.as_dottedpair.cdr
+
+isccc_sexpr_t *
+isccc_sexpr_cons(isccc_sexpr_t *car, isccc_sexpr_t *cdr);
+
+isccc_sexpr_t *
+isccc_sexpr_tconst(void);
+
+isccc_sexpr_t *
+isccc_sexpr_fromstring(const char *str);
+
+isccc_sexpr_t *
+isccc_sexpr_frombinary(const isccc_region_t *region);
+
+void
+isccc_sexpr_free(isccc_sexpr_t **sexprp);
+
+void
+isccc_sexpr_print(isccc_sexpr_t *sexpr, FILE *stream);
+
+isccc_sexpr_t *
+isccc_sexpr_car(isccc_sexpr_t *list);
+
+isccc_sexpr_t *
+isccc_sexpr_cdr(isccc_sexpr_t *list);
+
+void
+isccc_sexpr_setcar(isccc_sexpr_t *pair, isccc_sexpr_t *car);
+
+void
+isccc_sexpr_setcdr(isccc_sexpr_t *pair, isccc_sexpr_t *cdr);
+
+isccc_sexpr_t *
+isccc_sexpr_addtolist(isccc_sexpr_t **l1p, isccc_sexpr_t *l2);
+
+bool
+isccc_sexpr_listp(isccc_sexpr_t *sexpr);
+
+bool
+isccc_sexpr_emptyp(isccc_sexpr_t *sexpr);
+
+bool
+isccc_sexpr_stringp(isccc_sexpr_t *sexpr);
+
+bool
+isccc_sexpr_binaryp(isccc_sexpr_t *sexpr);
+
+char *
+isccc_sexpr_tostring(isccc_sexpr_t *sexpr);
+
+isccc_region_t *
+isccc_sexpr_tobinary(isccc_sexpr_t *sexpr);
+
+ISC_LANG_ENDDECLS
diff --git a/lib/isccc/include/isccc/symtab.h b/lib/isccc/include/isccc/symtab.h
new file mode 100644
index 0000000..a156c06
--- /dev/null
+++ b/lib/isccc/include/isccc/symtab.h
@@ -0,0 +1,133 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+#pragma once
+
+/*****
+***** Module Info
+*****/
+
+/*! \file isccc/symtab.h
+ * \brief
+ * Provides a simple memory-based symbol table.
+ *
+ * Keys are C strings. A type may be specified when looking up,
+ * defining, or undefining. A type value of 0 means "match any type";
+ * any other value will only match the given type.
+ *
+ * It's possible that a client will attempt to define a <key, type,
+ * value> tuple when a tuple with the given key and type already
+ * exists in the table. What to do in this case is specified by the
+ * client. Possible policies are:
+ *
+ *\li isccc_symexists_reject Disallow the define, returning #ISC_R_EXISTS
+ *\li isccc_symexists_replace Replace the old value with the new. The
+ * undefine action (if provided) will be called
+ * with the old <key, type, value> tuple.
+ *\li isccc_symexists_add Add the new tuple, leaving the old tuple in
+ * the table. Subsequent lookups will retrieve
+ * the most-recently-defined tuple.
+ *
+ * A lookup of a key using type 0 will return the most-recently
+ * defined symbol with that key. An undefine of a key using type 0
+ * will undefine the most-recently defined symbol with that key.
+ * Trying to define a key with type 0 is illegal.
+ *
+ * The symbol table library does not make a copy the key field, so the
+ * caller must ensure that any key it passes to isccc_symtab_define()
+ * will not change until it calls isccc_symtab_undefine() or
+ * isccc_symtab_destroy().
+ *
+ * A user-specified action will be called (if provided) when a symbol
+ * is undefined. It can be used to free memory associated with keys
+ * and/or values.
+ */
+
+/***
+ *** Imports.
+ ***/
+
+#include <stdbool.h>
+
+#include <isc/lang.h>
+
+#include <isccc/types.h>
+
+/***
+ *** Symbol Tables.
+ ***/
+
+typedef union isccc_symvalue {
+ void *as_pointer;
+ int as_integer;
+ unsigned int as_uinteger;
+} isccc_symvalue_t;
+
+typedef void (*isccc_symtabundefaction_t)(char *key, unsigned int type,
+ isccc_symvalue_t value,
+ void *userarg);
+
+typedef bool (*isccc_symtabforeachaction_t)(char *key, unsigned int type,
+ isccc_symvalue_t value,
+ void *userarg);
+
+typedef enum {
+ isccc_symexists_reject = 0,
+ isccc_symexists_replace = 1,
+ isccc_symexists_add = 2
+} isccc_symexists_t;
+
+ISC_LANG_BEGINDECLS
+
+isc_result_t
+isccc_symtab_create(unsigned int size,
+ isccc_symtabundefaction_t undefine_action,
+ void *undefine_arg, bool case_sensitive,
+ isccc_symtab_t **symtabp);
+
+void
+isccc_symtab_destroy(isccc_symtab_t **symtabp);
+
+isc_result_t
+isccc_symtab_lookup(isccc_symtab_t *symtab, const char *key, unsigned int type,
+ isccc_symvalue_t *value);
+
+isc_result_t
+isccc_symtab_define(isccc_symtab_t *symtab, char *key, unsigned int type,
+ isccc_symvalue_t value, isccc_symexists_t exists_policy);
+
+isc_result_t
+isccc_symtab_undefine(isccc_symtab_t *symtab, const char *key,
+ unsigned int type);
+
+void
+isccc_symtab_foreach(isccc_symtab_t *symtab, isccc_symtabforeachaction_t action,
+ void *arg);
+
+ISC_LANG_ENDDECLS
diff --git a/lib/isccc/include/isccc/symtype.h b/lib/isccc/include/isccc/symtype.h
new file mode 100644
index 0000000..8e67eda
--- /dev/null
+++ b/lib/isccc/include/isccc/symtype.h
@@ -0,0 +1,37 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+#pragma once
+
+/*! \file isccc/symtype.h */
+
+#define ISCCC_SYMTYPE_ZONESTATS 0x0001
+#define ISCCC_SYMTYPE_CCDUP 0x0002
+#define ISCCC_SYMTYPE_TELLSERVICE 0x0003
+#define ISCCC_SYMTYPE_TELLRESPONSE 0x0004
diff --git a/lib/isccc/include/isccc/types.h b/lib/isccc/include/isccc/types.h
new file mode 100644
index 0000000..f2032a7
--- /dev/null
+++ b/lib/isccc/include/isccc/types.h
@@ -0,0 +1,52 @@
+/*
+ * Portions 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+#pragma once
+
+/*! \file isccc/types.h */
+
+#include <inttypes.h>
+
+#include <isc/result.h>
+
+/*% isccc_time_t typedef */
+typedef uint32_t isccc_time_t;
+
+/*% isccc_sexpr_t typedef */
+typedef struct isccc_sexpr isccc_sexpr_t;
+/*% isccc_dottedpair_t typedef */
+typedef struct isccc_dottedpair isccc_dottedpair_t;
+/*% isccc_symtab_t typedef */
+typedef struct isccc_symtab isccc_symtab_t;
+
+/*% iscc region structure */
+typedef struct isccc_region {
+ unsigned char *rstart;
+ unsigned char *rend;
+} isccc_region_t;
diff --git a/lib/isccc/include/isccc/util.h b/lib/isccc/include/isccc/util.h
new file mode 100644
index 0000000..546b633
--- /dev/null
+++ b/lib/isccc/include/isccc/util.h
@@ -0,0 +1,208 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+#pragma once
+
+#include <inttypes.h>
+
+#include <isc/util.h>
+
+/*! \file isccc/util.h
+ * \brief
+ * Macros for dealing with unaligned numbers.
+ *
+ * \note no side effects are allowed when invoking these macros!
+ */
+
+#define GET8(v, w) \
+ do { \
+ v = *w; \
+ w++; \
+ } while (0)
+
+#define GET16(v, w) \
+ do { \
+ v = (unsigned int)w[0] << 8; \
+ v |= (unsigned int)w[1]; \
+ w += 2; \
+ } while (0)
+
+#define GET24(v, w) \
+ do { \
+ v = (unsigned int)w[0] << 16; \
+ v |= (unsigned int)w[1] << 8; \
+ v |= (unsigned int)w[2]; \
+ w += 3; \
+ } while (0)
+
+#define GET32(v, w) \
+ do { \
+ v = (unsigned int)w[0] << 24; \
+ v |= (unsigned int)w[1] << 16; \
+ v |= (unsigned int)w[2] << 8; \
+ v |= (unsigned int)w[3]; \
+ w += 4; \
+ } while (0)
+
+#define GET64(v, w) \
+ do { \
+ v = (uint64_t)w[0] << 56; \
+ v |= (uint64_t)w[1] << 48; \
+ v |= (uint64_t)w[2] << 40; \
+ v |= (uint64_t)w[3] << 32; \
+ v |= (uint64_t)w[4] << 24; \
+ v |= (uint64_t)w[5] << 16; \
+ v |= (uint64_t)w[6] << 8; \
+ v |= (uint64_t)w[7]; \
+ w += 8; \
+ } while (0)
+
+#define GETC16(v, w, d) \
+ do { \
+ GET8(v, w); \
+ if (v == 0) { \
+ d = ISCCC_TRUE; \
+ } else { \
+ d = ISCCC_FALSE; \
+ if (v == 255) \
+ GET16(v, w); \
+ } \
+ } while (0)
+
+#define GETC32(v, w) \
+ do { \
+ GET24(v, w); \
+ if (v == 0xffffffu) { \
+ GET32(v, w); \
+ } \
+ } while (0)
+
+#define GET_OFFSET(v, w) GET32(v, w)
+
+#define GET_MEM(v, c, w) \
+ do { \
+ memmove(v, w, c); \
+ w += c; \
+ } while (0)
+
+#define GET_TYPE(v, w) \
+ do { \
+ GET8(v, w); \
+ if (v > 127) { \
+ if (v < 255) { \
+ v = ((v & 0x7f) << 16) | ISCCC_RDATATYPE_SIG; \
+ } else { \
+ GET32(v, w); \
+ } \
+ } \
+ } while (0)
+
+#define PUT8(v, w) \
+ do { \
+ *w = (v & 0x000000ffU); \
+ w++; \
+ } while (0)
+
+#define PUT16(v, w) \
+ do { \
+ w[0] = (v & 0x0000ff00U) >> 8; \
+ w[1] = (v & 0x000000ffU); \
+ w += 2; \
+ } while (0)
+
+#define PUT24(v, w) \
+ do { \
+ w[0] = (v & 0x00ff0000U) >> 16; \
+ w[1] = (v & 0x0000ff00U) >> 8; \
+ w[2] = (v & 0x000000ffU); \
+ w += 3; \
+ } while (0)
+
+#define PUT32(v, w) \
+ do { \
+ w[0] = (v & 0xff000000U) >> 24; \
+ w[1] = (v & 0x00ff0000U) >> 16; \
+ w[2] = (v & 0x0000ff00U) >> 8; \
+ w[3] = (v & 0x000000ffU); \
+ w += 4; \
+ } while (0)
+
+#define PUT64(v, w) \
+ do { \
+ w[0] = (v & 0xff00000000000000ULL) >> 56; \
+ w[1] = (v & 0x00ff000000000000ULL) >> 48; \
+ w[2] = (v & 0x0000ff0000000000ULL) >> 40; \
+ w[3] = (v & 0x000000ff00000000ULL) >> 32; \
+ w[4] = (v & 0x00000000ff000000ULL) >> 24; \
+ w[5] = (v & 0x0000000000ff0000ULL) >> 16; \
+ w[6] = (v & 0x000000000000ff00ULL) >> 8; \
+ w[7] = (v & 0x00000000000000ffULL); \
+ w += 8; \
+ } while (0)
+
+#define PUTC16(v, w) \
+ do { \
+ if (v > 0 && v < 255) { \
+ PUT8(v, w); \
+ } else { \
+ PUT8(255, w); \
+ PUT16(v, w); \
+ } \
+ } while (0)
+
+#define PUTC32(v, w) \
+ do { \
+ if (v < 0xffffffU) { \
+ PUT24(v, w); \
+ } else { \
+ PUT24(0xffffffU, w); \
+ PUT32(v, w); \
+ } \
+ } while (0)
+
+#define PUT_OFFSET(v, w) PUT32(v, w)
+
+#include <string.h>
+
+#define PUT_MEM(s, c, w) \
+ do { \
+ memmove(w, s, c); \
+ w += c; \
+ } while (0)
+
+/*
+ * Regions.
+ */
+#define REGION_SIZE(r) ((unsigned int)((r).rend - (r).rstart))
+#define REGION_EMPTY(r) ((r).rstart == (r).rend)
+#define REGION_FROMSTRING(r, s) \
+ do { \
+ (r).rstart = (unsigned char *)s; \
+ (r).rend = (r).rstart + strlen(s); \
+ } while (0)
diff --git a/lib/isccc/sexpr.c b/lib/isccc/sexpr.c
new file mode 100644
index 0000000..62c80c4
--- /dev/null
+++ b/lib/isccc/sexpr.c
@@ -0,0 +1,317 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+/*! \file */
+
+#include <ctype.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <isc/assertions.h>
+#include <isc/print.h>
+
+#include <isccc/sexpr.h>
+#include <isccc/util.h>
+
+static isccc_sexpr_t sexpr_t = { ISCCC_SEXPRTYPE_T, { NULL } };
+
+#define CAR(s) (s)->value.as_dottedpair.car
+#define CDR(s) (s)->value.as_dottedpair.cdr
+
+isccc_sexpr_t *
+isccc_sexpr_cons(isccc_sexpr_t *car, isccc_sexpr_t *cdr) {
+ isccc_sexpr_t *sexpr;
+
+ sexpr = malloc(sizeof(*sexpr));
+ if (sexpr == NULL) {
+ return (NULL);
+ }
+ sexpr->type = ISCCC_SEXPRTYPE_DOTTEDPAIR;
+ CAR(sexpr) = car;
+ CDR(sexpr) = cdr;
+
+ return (sexpr);
+}
+
+isccc_sexpr_t *
+isccc_sexpr_tconst(void) {
+ return (&sexpr_t);
+}
+
+isccc_sexpr_t *
+isccc_sexpr_fromstring(const char *str) {
+ isccc_sexpr_t *sexpr;
+
+ sexpr = malloc(sizeof(*sexpr));
+ if (sexpr == NULL) {
+ return (NULL);
+ }
+ sexpr->type = ISCCC_SEXPRTYPE_STRING;
+ sexpr->value.as_string = strdup(str);
+ if (sexpr->value.as_string == NULL) {
+ free(sexpr);
+ return (NULL);
+ }
+
+ return (sexpr);
+}
+
+isccc_sexpr_t *
+isccc_sexpr_frombinary(const isccc_region_t *region) {
+ isccc_sexpr_t *sexpr;
+ unsigned int region_size;
+
+ sexpr = malloc(sizeof(*sexpr));
+ if (sexpr == NULL) {
+ return (NULL);
+ }
+ sexpr->type = ISCCC_SEXPRTYPE_BINARY;
+ region_size = REGION_SIZE(*region);
+ /*
+ * We add an extra byte when we malloc so we can NUL terminate
+ * the binary data. This allows the caller to use it as a C
+ * string. It's up to the caller to ensure this is safe. We don't
+ * add 1 to the length of the binary region, because the NUL is
+ * not part of the binary data.
+ */
+ sexpr->value.as_region.rstart = malloc(region_size + 1);
+ if (sexpr->value.as_region.rstart == NULL) {
+ free(sexpr);
+ return (NULL);
+ }
+ sexpr->value.as_region.rend = sexpr->value.as_region.rstart +
+ region_size;
+ memmove(sexpr->value.as_region.rstart, region->rstart, region_size);
+ /*
+ * NUL terminate.
+ */
+ sexpr->value.as_region.rstart[region_size] = '\0';
+
+ return (sexpr);
+}
+
+void
+isccc_sexpr_free(isccc_sexpr_t **sexprp) {
+ isccc_sexpr_t *sexpr;
+ isccc_sexpr_t *item;
+
+ sexpr = *sexprp;
+ *sexprp = NULL;
+ if (sexpr == NULL) {
+ return;
+ }
+ switch (sexpr->type) {
+ case ISCCC_SEXPRTYPE_STRING:
+ free(sexpr->value.as_string);
+ break;
+ case ISCCC_SEXPRTYPE_DOTTEDPAIR:
+ item = CAR(sexpr);
+ if (item != NULL) {
+ isccc_sexpr_free(&item);
+ }
+ item = CDR(sexpr);
+ if (item != NULL) {
+ isccc_sexpr_free(&item);
+ }
+ break;
+ case ISCCC_SEXPRTYPE_BINARY:
+ free(sexpr->value.as_region.rstart);
+ break;
+ }
+ free(sexpr);
+}
+
+static bool
+printable(isccc_region_t *r) {
+ unsigned char *curr;
+
+ curr = r->rstart;
+ while (curr != r->rend) {
+ if (!isprint(*curr)) {
+ return (false);
+ }
+ curr++;
+ }
+
+ return (true);
+}
+
+void
+isccc_sexpr_print(isccc_sexpr_t *sexpr, FILE *stream) {
+ isccc_sexpr_t *cdr;
+ unsigned int size, i;
+ unsigned char *curr;
+
+ if (sexpr == NULL) {
+ fprintf(stream, "nil");
+ return;
+ }
+
+ switch (sexpr->type) {
+ case ISCCC_SEXPRTYPE_T:
+ fprintf(stream, "t");
+ break;
+ case ISCCC_SEXPRTYPE_STRING:
+ fprintf(stream, "\"%s\"", sexpr->value.as_string);
+ break;
+ case ISCCC_SEXPRTYPE_DOTTEDPAIR:
+ fprintf(stream, "(");
+ do {
+ isccc_sexpr_print(CAR(sexpr), stream);
+ cdr = CDR(sexpr);
+ if (cdr != NULL) {
+ fprintf(stream, " ");
+ if (cdr->type != ISCCC_SEXPRTYPE_DOTTEDPAIR) {
+ fprintf(stream, ". ");
+ isccc_sexpr_print(cdr, stream);
+ cdr = NULL;
+ }
+ }
+ sexpr = cdr;
+ } while (sexpr != NULL);
+ fprintf(stream, ")");
+ break;
+ case ISCCC_SEXPRTYPE_BINARY:
+ size = REGION_SIZE(sexpr->value.as_region);
+ curr = sexpr->value.as_region.rstart;
+ if (printable(&sexpr->value.as_region)) {
+ fprintf(stream, "'%.*s'", (int)size, curr);
+ } else {
+ fprintf(stream, "0x");
+ for (i = 0; i < size; i++) {
+ fprintf(stream, "%02x", *curr++);
+ }
+ }
+ break;
+ default:
+ UNREACHABLE();
+ }
+}
+
+isccc_sexpr_t *
+isccc_sexpr_car(isccc_sexpr_t *list) {
+ REQUIRE(list->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
+
+ return (CAR(list));
+}
+
+isccc_sexpr_t *
+isccc_sexpr_cdr(isccc_sexpr_t *list) {
+ REQUIRE(list->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
+
+ return (CDR(list));
+}
+
+void
+isccc_sexpr_setcar(isccc_sexpr_t *pair, isccc_sexpr_t *car) {
+ REQUIRE(pair->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
+
+ CAR(pair) = car;
+}
+
+void
+isccc_sexpr_setcdr(isccc_sexpr_t *pair, isccc_sexpr_t *cdr) {
+ REQUIRE(pair->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
+
+ CDR(pair) = cdr;
+}
+
+isccc_sexpr_t *
+isccc_sexpr_addtolist(isccc_sexpr_t **l1p, isccc_sexpr_t *l2) {
+ isccc_sexpr_t *last, *elt, *l1;
+
+ REQUIRE(l1p != NULL);
+ l1 = *l1p;
+ REQUIRE(l1 == NULL || l1->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
+
+ elt = isccc_sexpr_cons(l2, NULL);
+ if (elt == NULL) {
+ return (NULL);
+ }
+ if (l1 == NULL) {
+ *l1p = elt;
+ return (elt);
+ }
+ for (last = l1; CDR(last) != NULL; last = CDR(last)) {
+ /* Nothing */
+ }
+ CDR(last) = elt;
+
+ return (elt);
+}
+
+bool
+isccc_sexpr_listp(isccc_sexpr_t *sexpr) {
+ if (sexpr == NULL || sexpr->type == ISCCC_SEXPRTYPE_DOTTEDPAIR) {
+ return (true);
+ }
+ return (false);
+}
+
+bool
+isccc_sexpr_emptyp(isccc_sexpr_t *sexpr) {
+ if (sexpr == NULL) {
+ return (true);
+ }
+ return (false);
+}
+
+bool
+isccc_sexpr_stringp(isccc_sexpr_t *sexpr) {
+ if (sexpr != NULL && sexpr->type == ISCCC_SEXPRTYPE_STRING) {
+ return (true);
+ }
+ return (false);
+}
+
+bool
+isccc_sexpr_binaryp(isccc_sexpr_t *sexpr) {
+ if (sexpr != NULL && sexpr->type == ISCCC_SEXPRTYPE_BINARY) {
+ return (true);
+ }
+ return (false);
+}
+
+char *
+isccc_sexpr_tostring(isccc_sexpr_t *sexpr) {
+ REQUIRE(sexpr != NULL && (sexpr->type == ISCCC_SEXPRTYPE_STRING ||
+ sexpr->type == ISCCC_SEXPRTYPE_BINARY));
+
+ if (sexpr->type == ISCCC_SEXPRTYPE_BINARY) {
+ return ((char *)sexpr->value.as_region.rstart);
+ }
+ return (sexpr->value.as_string);
+}
+
+isccc_region_t *
+isccc_sexpr_tobinary(isccc_sexpr_t *sexpr) {
+ REQUIRE(sexpr != NULL && sexpr->type == ISCCC_SEXPRTYPE_BINARY);
+ return (&sexpr->value.as_region);
+}
diff --git a/lib/isccc/symtab.c b/lib/isccc/symtab.c
new file mode 100644
index 0000000..62e4614
--- /dev/null
+++ b/lib/isccc/symtab.c
@@ -0,0 +1,293 @@
+/*
+ * 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (C) 2001 Nominum, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC AND NOMINUM DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+/*! \file */
+
+#include <ctype.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include <isc/assertions.h>
+#include <isc/magic.h>
+#include <isc/result.h>
+#include <isc/string.h>
+
+#include <isccc/symtab.h>
+#include <isccc/util.h>
+
+typedef struct elt {
+ char *key;
+ unsigned int type;
+ isccc_symvalue_t value;
+ ISC_LINK(struct elt) link;
+} elt_t;
+
+typedef ISC_LIST(elt_t) eltlist_t;
+
+#define SYMTAB_MAGIC ISC_MAGIC('S', 'y', 'm', 'T')
+#define VALID_SYMTAB(st) ISC_MAGIC_VALID(st, SYMTAB_MAGIC)
+
+struct isccc_symtab {
+ unsigned int magic;
+ unsigned int size;
+ eltlist_t *table;
+ isccc_symtabundefaction_t undefine_action;
+ void *undefine_arg;
+ bool case_sensitive;
+};
+
+isc_result_t
+isccc_symtab_create(unsigned int size,
+ isccc_symtabundefaction_t undefine_action,
+ void *undefine_arg, bool case_sensitive,
+ isccc_symtab_t **symtabp) {
+ isccc_symtab_t *symtab;
+ unsigned int i;
+
+ REQUIRE(symtabp != NULL && *symtabp == NULL);
+ REQUIRE(size > 0); /* Should be prime. */
+
+ symtab = malloc(sizeof(*symtab));
+ if (symtab == NULL) {
+ return (ISC_R_NOMEMORY);
+ }
+ symtab->table = malloc(size * sizeof(eltlist_t));
+ if (symtab->table == NULL) {
+ free(symtab);
+ return (ISC_R_NOMEMORY);
+ }
+ for (i = 0; i < size; i++) {
+ ISC_LIST_INIT(symtab->table[i]);
+ }
+ symtab->size = size;
+ symtab->undefine_action = undefine_action;
+ symtab->undefine_arg = undefine_arg;
+ symtab->case_sensitive = case_sensitive;
+ symtab->magic = SYMTAB_MAGIC;
+
+ *symtabp = symtab;
+
+ return (ISC_R_SUCCESS);
+}
+
+static void
+free_elt(isccc_symtab_t *symtab, unsigned int bucket, elt_t *elt) {
+ ISC_LIST_UNLINK(symtab->table[bucket], elt, link);
+ if (symtab->undefine_action != NULL) {
+ (symtab->undefine_action)(elt->key, elt->type, elt->value,
+ symtab->undefine_arg);
+ }
+ free(elt);
+}
+
+void
+isccc_symtab_destroy(isccc_symtab_t **symtabp) {
+ isccc_symtab_t *symtab;
+ unsigned int i;
+ elt_t *elt, *nelt;
+
+ REQUIRE(symtabp != NULL);
+ symtab = *symtabp;
+ *symtabp = NULL;
+ REQUIRE(VALID_SYMTAB(symtab));
+
+ for (i = 0; i < symtab->size; i++) {
+ for (elt = ISC_LIST_HEAD(symtab->table[i]); elt != NULL;
+ elt = nelt)
+ {
+ nelt = ISC_LIST_NEXT(elt, link);
+ free_elt(symtab, i, elt);
+ }
+ }
+ free(symtab->table);
+ symtab->magic = 0;
+ free(symtab);
+}
+
+static unsigned int
+hash(const char *key, bool case_sensitive) {
+ const char *s;
+ unsigned int h = 0;
+ unsigned int g;
+ int c;
+
+ /*
+ * P. J. Weinberger's hash function, adapted from p. 436 of
+ * _Compilers: Principles, Techniques, and Tools_, Aho, Sethi
+ * and Ullman, Addison-Wesley, 1986, ISBN 0-201-10088-6.
+ */
+
+ if (case_sensitive) {
+ for (s = key; *s != '\0'; s++) {
+ h = (h << 4) + *s;
+ if ((g = (h & 0xf0000000)) != 0) {
+ h = h ^ (g >> 24);
+ h = h ^ g;
+ }
+ }
+ } else {
+ for (s = key; *s != '\0'; s++) {
+ c = *s;
+ c = tolower((unsigned char)c);
+ h = (h << 4) + c;
+ if ((g = (h & 0xf0000000)) != 0) {
+ h = h ^ (g >> 24);
+ h = h ^ g;
+ }
+ }
+ }
+
+ return (h);
+}
+
+#define FIND(s, k, t, b, e) \
+ b = hash((k), (s)->case_sensitive) % (s)->size; \
+ if ((s)->case_sensitive) { \
+ for (e = ISC_LIST_HEAD((s)->table[b]); e != NULL; \
+ e = ISC_LIST_NEXT(e, link)) \
+ { \
+ if (((t) == 0 || e->type == (t)) && \
+ strcmp(e->key, (k)) == 0) \
+ break; \
+ } \
+ } else { \
+ for (e = ISC_LIST_HEAD((s)->table[b]); e != NULL; \
+ e = ISC_LIST_NEXT(e, link)) \
+ { \
+ if (((t) == 0 || e->type == (t)) && \
+ strcasecmp(e->key, (k)) == 0) \
+ break; \
+ } \
+ }
+
+isc_result_t
+isccc_symtab_lookup(isccc_symtab_t *symtab, const char *key, unsigned int type,
+ isccc_symvalue_t *value) {
+ unsigned int bucket;
+ elt_t *elt;
+
+ REQUIRE(VALID_SYMTAB(symtab));
+ REQUIRE(key != NULL);
+
+ FIND(symtab, key, type, bucket, elt);
+
+ if (elt == NULL) {
+ return (ISC_R_NOTFOUND);
+ }
+
+ if (value != NULL) {
+ *value = elt->value;
+ }
+
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isccc_symtab_define(isccc_symtab_t *symtab, char *key, unsigned int type,
+ isccc_symvalue_t value, isccc_symexists_t exists_policy) {
+ unsigned int bucket;
+ elt_t *elt;
+
+ REQUIRE(VALID_SYMTAB(symtab));
+ REQUIRE(key != NULL);
+ REQUIRE(type != 0);
+
+ FIND(symtab, key, type, bucket, elt);
+
+ if (exists_policy != isccc_symexists_add && elt != NULL) {
+ if (exists_policy == isccc_symexists_reject) {
+ return (ISC_R_EXISTS);
+ }
+ INSIST(exists_policy == isccc_symexists_replace);
+ ISC_LIST_UNLINK(symtab->table[bucket], elt, link);
+ if (symtab->undefine_action != NULL) {
+ (symtab->undefine_action)(elt->key, elt->type,
+ elt->value,
+ symtab->undefine_arg);
+ }
+ } else {
+ elt = malloc(sizeof(*elt));
+ if (elt == NULL) {
+ return (ISC_R_NOMEMORY);
+ }
+ ISC_LINK_INIT(elt, link);
+ }
+
+ elt->key = key;
+ elt->type = type;
+ elt->value = value;
+
+ /*
+ * We prepend so that the most recent definition will be found.
+ */
+ ISC_LIST_PREPEND(symtab->table[bucket], elt, link);
+
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isccc_symtab_undefine(isccc_symtab_t *symtab, const char *key,
+ unsigned int type) {
+ unsigned int bucket;
+ elt_t *elt;
+
+ REQUIRE(VALID_SYMTAB(symtab));
+ REQUIRE(key != NULL);
+
+ FIND(symtab, key, type, bucket, elt);
+
+ if (elt == NULL) {
+ return (ISC_R_NOTFOUND);
+ }
+
+ free_elt(symtab, bucket, elt);
+
+ return (ISC_R_SUCCESS);
+}
+
+void
+isccc_symtab_foreach(isccc_symtab_t *symtab, isccc_symtabforeachaction_t action,
+ void *arg) {
+ unsigned int i;
+ elt_t *elt, *nelt;
+
+ REQUIRE(VALID_SYMTAB(symtab));
+ REQUIRE(action != NULL);
+
+ for (i = 0; i < symtab->size; i++) {
+ for (elt = ISC_LIST_HEAD(symtab->table[i]); elt != NULL;
+ elt = nelt)
+ {
+ nelt = ISC_LIST_NEXT(elt, link);
+ if ((action)(elt->key, elt->type, elt->value, arg)) {
+ free_elt(symtab, i, elt);
+ }
+ }
+ }
+}