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-rw-r--r--lib/irs/Makefile.am27
-rw-r--r--lib/irs/Makefile.in889
-rw-r--r--lib/irs/include/irs/resconf.h140
-rw-r--r--lib/irs/resconf.c713
4 files changed, 1769 insertions, 0 deletions
diff --git a/lib/irs/Makefile.am b/lib/irs/Makefile.am
new file mode 100644
index 0000000..85c4065
--- /dev/null
+++ b/lib/irs/Makefile.am
@@ -0,0 +1,27 @@
+include $(top_srcdir)/Makefile.top
+
+lib_LTLIBRARIES = libirs.la
+
+libirs_ladir = $(includedir)/irs
+libirs_la_HEADERS = \
+ include/irs/resconf.h
+
+libirs_la_SOURCES = \
+ $(libirs_la_HEADERS) \
+ resconf.c
+
+libirs_la_CPPFLAGS = \
+ $(AM_CPPFLAGS) \
+ $(LIBISC_CFLAGS) \
+ $(LIBDNS_CFLAGS) \
+ $(LIBISCCFG_CFLAGS) \
+ $(LIBIRS_CFLAGS)
+
+libirs_la_LIBADD = \
+ $(LIBISC_LIBS) \
+ $(LIBDNS_LIBS) \
+ $(LIBISCCFG_LIBS)
+
+libirs_la_LDFLAGS = \
+ $(AM_LDFLAGS) \
+ -release "$(PACKAGE_VERSION)"
diff --git a/lib/irs/Makefile.in b/lib/irs/Makefile.in
new file mode 100644
index 0000000..66b3575
--- /dev/null
+++ b/lib/irs/Makefile.in
@@ -0,0 +1,889 @@
+# 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.
+
+@SET_MAKE@
+
+# Hey Emacs, this is -*- makefile-automake -*- file!
+# vim: filetype=automake
+
+
+VPATH = @srcdir@
+am__is_gnu_make = { \
+ if test -z '$(MAKELEVEL)'; then \
+ false; \
+ elif test -n '$(MAKE_HOST)'; then \
+ true; \
+ elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+ true; \
+ else \
+ false; \
+ fi; \
+}
+am__make_running_with_option = \
+ case $${target_option-} in \
+ ?) ;; \
+ *) echo "am__make_running_with_option: internal error: invalid" \
+ "target option '$${target_option-}' specified" >&2; \
+ exit 1;; \
+ esac; \
+ has_opt=no; \
+ sane_makeflags=$$MAKEFLAGS; \
+ if $(am__is_gnu_make); then \
+ sane_makeflags=$$MFLAGS; \
+ else \
+ case $$MAKEFLAGS in \
+ *\\[\ \ ]*) \
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+ | sed "s/$$bs$$bs[$$bs $$bs ]*//g"`;; \
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+ fi; \
+ skip_next=no; \
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+ }; \
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+ case $$flg in \
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+ -*l?*) strip_trailopt 'l';; \
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+ -[JT]) skip_next=yes;; \
+ esac; \
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+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
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+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
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+@HOST_MACOS_TRUE@am__append_1 = \
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+
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+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_check_compile_flag.m4 \
+ $(top_srcdir)/m4/ax_check_link_flag.m4 \
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+ $(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
+ $(top_srcdir)/m4/ax_jemalloc.m4 \
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+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+ $(ACLOCAL_M4)
+DIST_COMMON = $(srcdir)/Makefile.am $(libirs_la_HEADERS) \
+ $(am__DIST_COMMON)
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+CONFIG_HEADER = $(top_builddir)/config.h
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+CONFIG_CLEAN_VPATH_FILES =
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+ esac;
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+ $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
+ if (++n[$$2] == $(am__install_max)) \
+ { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \
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+ $(am__cd) "$$dir" && rm -f $$files; }; \
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+am__installdirs = "$(DESTDIR)$(libdir)" "$(DESTDIR)$(libirs_ladir)"
+LTLIBRARIES = $(lib_LTLIBRARIES)
+libirs_la_DEPENDENCIES = $(LIBISC_LIBS) $(LIBDNS_LIBS) \
+ $(LIBISCCFG_LIBS)
+am__objects_1 =
+am_libirs_la_OBJECTS = $(am__objects_1) libirs_la-resconf.lo
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+am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
+am__v_lt_0 = --silent
+am__v_lt_1 =
+libirs_la_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+ $(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
+ $(libirs_la_LDFLAGS) $(LDFLAGS) -o $@
+AM_V_P = $(am__v_P_@AM_V@)
+am__v_P_ = $(am__v_P_@AM_DEFAULT_V@)
+am__v_P_0 = false
+am__v_P_1 = :
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+am__v_GEN_0 = @echo " GEN " $@;
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+am__maybe_remake_depfiles = depfiles
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+am__mv = mv -f
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+ $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
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+ $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) \
+ $(AM_CFLAGS) $(CFLAGS)
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+am__v_CCLD_0 = @echo " CCLD " $@;
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+
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+ $(top_builddir)/lib/irs/libirs.la
+
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+
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+ include/irs/resconf.h
+
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+ $(libirs_la_HEADERS) \
+ resconf.c
+
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+ $(LIBISC_CFLAGS) \
+ $(LIBDNS_CFLAGS) \
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+
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+ $(LIBDNS_LIBS) \
+ $(LIBISCCFG_LIBS)
+
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+ $(AM_LDFLAGS) \
+ -release "$(PACKAGE_VERSION)"
+
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+
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+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/lib/irs/include/irs/resconf.h b/lib/irs/include/irs/resconf.h
new file mode 100644
index 0000000..3af1723
--- /dev/null
+++ b/lib/irs/include/irs/resconf.h
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+#pragma once
+
+#include <isc/lang.h>
+#include <isc/list.h>
+#include <isc/types.h>
+
+/*! \file
+ *
+ * \brief
+ * The IRS resconf module parses the legacy "/etc/resolv.conf" file and
+ * creates the corresponding configuration objects for the DNS library
+ * modules.
+ */
+
+/*%< resolv.conf configuration information */
+typedef struct irs_resconf irs_resconf_t;
+
+/*%
+ * A DNS search list specified in the 'domain' or 'search' statements
+ * in the "resolv.conf" file.
+ */
+typedef struct irs_resconf_search {
+ char *domain;
+ ISC_LINK(struct irs_resconf_search) link;
+} irs_resconf_search_t;
+
+typedef ISC_LIST(irs_resconf_search_t) irs_resconf_searchlist_t;
+
+ISC_LANG_BEGINDECLS
+
+isc_result_t
+irs_resconf_load(isc_mem_t *mctx, const char *filename, irs_resconf_t **confp);
+/*%<
+ * Load the resolver configuration file 'filename' in the "resolv.conf" format,
+ * and create a new irs_resconf_t object from the configuration. If the file
+ * is not found ISC_R_FILENOTFOUND is returned with the structure initialized
+ * as if file contained only:
+ *
+ * nameserver ::1
+ * nameserver 127.0.0.1
+ *
+ * Notes:
+ *
+ *\li Currently, only the following options are supported:
+ * nameserver, domain, search, sortlist, ndots, and options.
+ * In addition, 'sortlist' is not actually effective; it's parsed, but
+ * the application cannot use the configuration.
+ *
+ * Returns:
+ * \li ISC_R_SUCCESS on success
+ * \li ISC_R_FILENOTFOUND if the file was not found. *confp will be valid.
+ * \li other on error.
+ *
+ * Requires:
+ *
+ *\li 'mctx' is a valid memory context.
+ *
+ *\li 'filename' != NULL
+ *
+ *\li 'confp' != NULL && '*confp' == NULL
+ */
+
+void
+irs_resconf_destroy(irs_resconf_t **confp);
+/*%<
+ * Destroy the resconf object.
+ *
+ * Requires:
+ *
+ *\li '*confp' is a valid resconf object.
+ *
+ * Ensures:
+ *
+ *\li *confp == NULL
+ */
+
+isc_sockaddrlist_t *
+irs_resconf_getnameservers(irs_resconf_t *conf);
+/*%<
+ * Return a list of name server addresses stored in 'conf'.
+ *
+ * Requires:
+ *
+ *\li 'conf' is a valid resconf object.
+ */
+
+irs_resconf_searchlist_t *
+irs_resconf_getsearchlist(irs_resconf_t *conf);
+/*%<
+ * Return the search list stored in 'conf'.
+ *
+ * Requires:
+ *
+ *\li 'conf' is a valid resconf object.
+ */
+
+unsigned int
+irs_resconf_getndots(irs_resconf_t *conf);
+/*%<
+ * Return the 'ndots' value stored in 'conf'.
+ *
+ * Requires:
+ *
+ *\li 'conf' is a valid resconf object.
+ */
+
+unsigned int
+irs_resconf_getattempts(irs_resconf_t *conf);
+/*%<
+ * Return the 'attempts' value stored in 'conf'.
+ *
+ * Requires:
+ *
+ *\li 'conf' is a valid resconf object.
+ */
+
+unsigned int
+irs_resconf_gettimeout(irs_resconf_t *conf);
+/*%<
+ * Return the 'timeout' value stored in 'conf'.
+ *
+ * Requires:
+ *
+ *\li 'conf' is a valid resconf object.
+ */
+
+ISC_LANG_ENDDECLS
diff --git a/lib/irs/resconf.c b/lib/irs/resconf.c
new file mode 100644
index 0000000..2cd98aa
--- /dev/null
+++ b/lib/irs/resconf.c
@@ -0,0 +1,713 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*! \file resconf.c */
+
+/**
+ * Module for parsing resolv.conf files (largely derived from lwconfig.c).
+ *
+ * irs_resconf_load() opens the file filename and parses it to initialize
+ * the configuration structure.
+ *
+ * \section lwconfig_return Return Values
+ *
+ * irs_resconf_load() returns #IRS_R_SUCCESS if it successfully read and
+ * parsed filename. It returns a non-0 error code if filename could not be
+ * opened or contained incorrect resolver statements.
+ *
+ * \section lwconfig_see See Also
+ *
+ * stdio(3), \link resolver resolver \endlink
+ *
+ * \section files Files
+ *
+ * /etc/resolv.conf
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+
+#include <isc/magic.h>
+#include <isc/mem.h>
+#include <isc/netaddr.h>
+#include <isc/sockaddr.h>
+#include <isc/util.h>
+
+#include <irs/resconf.h>
+
+#define IRS_RESCONF_MAGIC ISC_MAGIC('R', 'E', 'S', 'c')
+#define IRS_RESCONF_VALID(c) ISC_MAGIC_VALID(c, IRS_RESCONF_MAGIC)
+
+/*!
+ * protocol constants
+ */
+
+#if !defined(NS_INADDRSZ)
+#define NS_INADDRSZ 4
+#endif /* if !defined(NS_INADDRSZ) */
+
+#if !defined(NS_IN6ADDRSZ)
+#define NS_IN6ADDRSZ 16
+#endif /* if !defined(NS_IN6ADDRSZ) */
+
+/*!
+ * resolv.conf parameters
+ */
+
+#define RESCONFMAXNAMESERVERS 3U /*%< max 3 "nameserver" entries */
+#define RESCONFMAXSEARCH 8U /*%< max 8 domains in "search" entry */
+#define RESCONFMAXLINELEN 256U /*%< max size of a line */
+#define RESCONFMAXSORTLIST 10U /*%< max 10 */
+
+#define CHECK(op) \
+ do { \
+ result = (op); \
+ if (result != ISC_R_SUCCESS) \
+ goto cleanup; \
+ } while (0)
+
+/*!
+ * configuration data structure
+ */
+
+struct irs_resconf {
+ /*
+ * The configuration data is a thread-specific object, and does not
+ * need to be locked.
+ */
+ unsigned int magic;
+ isc_mem_t *mctx;
+
+ isc_sockaddrlist_t nameservers;
+ unsigned int numns; /*%< number of configured servers
+ * */
+
+ char *domainname;
+ char *search[RESCONFMAXSEARCH];
+ uint8_t searchnxt; /*%< index for next free slot
+ * */
+
+ irs_resconf_searchlist_t searchlist;
+
+ struct {
+ isc_netaddr_t addr;
+ /*% mask has a non-zero 'family' if set */
+ isc_netaddr_t mask;
+ } sortlist[RESCONFMAXSORTLIST];
+ uint8_t sortlistnxt;
+
+ /*%< non-zero if 'options debug' set */
+ uint8_t resdebug;
+ /*%< set to n in 'options ndots:n' */
+ uint8_t ndots;
+ /*%< set to n in 'options attempts:n' */
+ uint8_t attempts;
+ /*%< set to n in 'options timeout:n' */
+ uint8_t timeout;
+};
+
+static isc_result_t
+resconf_parsenameserver(irs_resconf_t *conf, FILE *fp);
+static isc_result_t
+resconf_parsedomain(irs_resconf_t *conf, FILE *fp);
+static isc_result_t
+resconf_parsesearch(irs_resconf_t *conf, FILE *fp);
+static isc_result_t
+resconf_parsesortlist(irs_resconf_t *conf, FILE *fp);
+static isc_result_t
+resconf_parseoption(irs_resconf_t *ctx, FILE *fp);
+
+/*!
+ * Eat characters from FP until EOL or EOF. Returns EOF or '\n'
+ */
+static int
+eatline(FILE *fp) {
+ int ch;
+
+ ch = fgetc(fp);
+ while (ch != '\n' && ch != EOF) {
+ ch = fgetc(fp);
+ }
+
+ return (ch);
+}
+
+/*!
+ * Eats white space up to next newline or non-whitespace character (of
+ * EOF). Returns the last character read. Comments are considered white
+ * space.
+ */
+static int
+eatwhite(FILE *fp) {
+ int ch;
+
+ ch = fgetc(fp);
+ while (ch != '\n' && ch != EOF && isspace((unsigned char)ch)) {
+ ch = fgetc(fp);
+ }
+
+ if (ch == ';' || ch == '#') {
+ ch = eatline(fp);
+ }
+
+ return (ch);
+}
+
+/*!
+ * Skip over any leading whitespace and then read in the next sequence of
+ * non-whitespace characters. In this context newline is not considered
+ * whitespace. Returns EOF on end-of-file, or the character
+ * that caused the reading to stop.
+ */
+static int
+getword(FILE *fp, char *buffer, size_t size) {
+ char *p = NULL;
+ int ch;
+
+ REQUIRE(buffer != NULL);
+ REQUIRE(size > 0U);
+
+ p = buffer;
+ *p = '\0';
+
+ ch = eatwhite(fp);
+
+ if (ch == EOF) {
+ return (EOF);
+ }
+
+ do {
+ *p = '\0';
+
+ if (ch == EOF || isspace((unsigned char)ch)) {
+ break;
+ } else if ((size_t)(p - buffer) == size - 1) {
+ return (EOF); /* Not enough space. */
+ }
+
+ *p++ = (char)ch;
+ ch = fgetc(fp);
+ } while (1);
+
+ return (ch);
+}
+
+static isc_result_t
+add_server(isc_mem_t *mctx, const char *address_str,
+ isc_sockaddrlist_t *nameservers) {
+ int error;
+ isc_sockaddr_t *address = NULL;
+ struct addrinfo hints, *res;
+ isc_result_t result = ISC_R_SUCCESS;
+
+ res = NULL;
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_DGRAM;
+ hints.ai_protocol = IPPROTO_UDP;
+ hints.ai_flags = AI_NUMERICHOST;
+ error = getaddrinfo(address_str, "53", &hints, &res);
+ if (error != 0) {
+ return (ISC_R_BADADDRESSFORM);
+ }
+
+ /* XXX: special case: treat all-0 IPv4 address as loopback */
+ if (res->ai_family == AF_INET) {
+ struct in_addr *v4;
+ unsigned char zeroaddress[] = { 0, 0, 0, 0 };
+ unsigned char loopaddress[] = { 127, 0, 0, 1 };
+
+ v4 = &((struct sockaddr_in *)res->ai_addr)->sin_addr;
+ if (memcmp(v4, zeroaddress, 4) == 0) {
+ memmove(v4, loopaddress, 4);
+ }
+ }
+
+ address = isc_mem_get(mctx, sizeof(*address));
+ if (res->ai_addrlen > sizeof(address->type)) {
+ isc_mem_put(mctx, address, sizeof(*address));
+ result = ISC_R_RANGE;
+ goto cleanup;
+ }
+ address->length = (unsigned int)res->ai_addrlen;
+ memmove(&address->type.ss, res->ai_addr, res->ai_addrlen);
+ ISC_LINK_INIT(address, link);
+ ISC_LIST_APPEND(*nameservers, address, link);
+
+cleanup:
+ freeaddrinfo(res);
+
+ return (result);
+}
+
+static isc_result_t
+create_addr(const char *buffer, isc_netaddr_t *addr, int convert_zero) {
+ struct in_addr v4;
+ struct in6_addr v6;
+
+ if (inet_pton(AF_INET, buffer, &v4) == 1) {
+ if (convert_zero) {
+ unsigned char zeroaddress[] = { 0, 0, 0, 0 };
+ unsigned char loopaddress[] = { 127, 0, 0, 1 };
+ if (memcmp(&v4, zeroaddress, 4) == 0) {
+ memmove(&v4, loopaddress, 4);
+ }
+ }
+ addr->family = AF_INET;
+ memmove(&addr->type.in, &v4, NS_INADDRSZ);
+ addr->zone = 0;
+ } else if (inet_pton(AF_INET6, buffer, &v6) == 1) {
+ addr->family = AF_INET6;
+ memmove(&addr->type.in6, &v6, NS_IN6ADDRSZ);
+ addr->zone = 0;
+ } else {
+ return (ISC_R_BADADDRESSFORM); /* Unrecognised format. */
+ }
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+resconf_parsenameserver(irs_resconf_t *conf, FILE *fp) {
+ char word[RESCONFMAXLINELEN];
+ int cp;
+ isc_result_t result;
+
+ cp = getword(fp, word, sizeof(word));
+ if (strlen(word) == 0U) {
+ return (ISC_R_UNEXPECTEDEND); /* Nothing on line. */
+ } else if (cp == ' ' || cp == '\t') {
+ cp = eatwhite(fp);
+ }
+
+ if (cp != EOF && cp != '\n') {
+ return (ISC_R_UNEXPECTEDTOKEN); /* Extra junk on line. */
+ }
+
+ if (conf->numns == RESCONFMAXNAMESERVERS) {
+ return (ISC_R_SUCCESS);
+ }
+
+ result = add_server(conf->mctx, word, &conf->nameservers);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ conf->numns++;
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+resconf_parsedomain(irs_resconf_t *conf, FILE *fp) {
+ char word[RESCONFMAXLINELEN];
+ int res;
+ unsigned int i;
+
+ res = getword(fp, word, sizeof(word));
+ if (strlen(word) == 0U) {
+ return (ISC_R_UNEXPECTEDEND); /* Nothing else on line. */
+ } else if (res == ' ' || res == '\t') {
+ res = eatwhite(fp);
+ }
+
+ if (res != EOF && res != '\n') {
+ return (ISC_R_UNEXPECTEDTOKEN); /* Extra junk on line. */
+ }
+
+ if (conf->domainname != NULL) {
+ isc_mem_free(conf->mctx, conf->domainname);
+ }
+
+ /*
+ * Search and domain are mutually exclusive.
+ */
+ for (i = 0; i < RESCONFMAXSEARCH; i++) {
+ if (conf->search[i] != NULL) {
+ isc_mem_free(conf->mctx, conf->search[i]);
+ conf->search[i] = NULL;
+ }
+ }
+ conf->searchnxt = 0;
+
+ conf->domainname = isc_mem_strdup(conf->mctx, word);
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+resconf_parsesearch(irs_resconf_t *conf, FILE *fp) {
+ int delim;
+ unsigned int idx;
+ char word[RESCONFMAXLINELEN];
+
+ if (conf->domainname != NULL) {
+ /*
+ * Search and domain are mutually exclusive.
+ */
+ isc_mem_free(conf->mctx, conf->domainname);
+ conf->domainname = NULL;
+ }
+
+ /*
+ * Remove any previous search definitions.
+ */
+ for (idx = 0; idx < RESCONFMAXSEARCH; idx++) {
+ if (conf->search[idx] != NULL) {
+ isc_mem_free(conf->mctx, conf->search[idx]);
+ conf->search[idx] = NULL;
+ }
+ }
+ conf->searchnxt = 0;
+
+ delim = getword(fp, word, sizeof(word));
+ if (strlen(word) == 0U) {
+ return (ISC_R_UNEXPECTEDEND); /* Nothing else on line. */
+ }
+
+ idx = 0;
+ while (strlen(word) > 0U) {
+ if (conf->searchnxt == RESCONFMAXSEARCH) {
+ goto ignore; /* Too many domains. */
+ }
+
+ INSIST(idx < sizeof(conf->search) / sizeof(conf->search[0]));
+ conf->search[idx] = isc_mem_strdup(conf->mctx, word);
+ idx++;
+ conf->searchnxt++;
+
+ ignore:
+ if (delim == EOF || delim == '\n') {
+ break;
+ } else {
+ delim = getword(fp, word, sizeof(word));
+ }
+ }
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+resconf_parsesortlist(irs_resconf_t *conf, FILE *fp) {
+ int delim, res;
+ unsigned int idx;
+ char word[RESCONFMAXLINELEN];
+ char *p;
+
+ delim = getword(fp, word, sizeof(word));
+ if (strlen(word) == 0U) {
+ return (ISC_R_UNEXPECTEDEND); /* Empty line after keyword. */
+ }
+
+ while (strlen(word) > 0U) {
+ if (conf->sortlistnxt == RESCONFMAXSORTLIST) {
+ return (ISC_R_QUOTA); /* Too many values. */
+ }
+
+ p = strchr(word, '/');
+ if (p != NULL) {
+ *p++ = '\0';
+ }
+
+ idx = conf->sortlistnxt;
+ INSIST(idx <
+ sizeof(conf->sortlist) / sizeof(conf->sortlist[0]));
+ res = create_addr(word, &conf->sortlist[idx].addr, 1);
+ if (res != ISC_R_SUCCESS) {
+ return (res);
+ }
+
+ if (p != NULL) {
+ res = create_addr(p, &conf->sortlist[idx].mask, 0);
+ if (res != ISC_R_SUCCESS) {
+ return (res);
+ }
+ } else {
+ /*
+ * Make up a mask. (XXX: is this correct?)
+ */
+ conf->sortlist[idx].mask = conf->sortlist[idx].addr;
+ memset(&conf->sortlist[idx].mask.type, 0xff,
+ sizeof(conf->sortlist[idx].mask.type));
+ }
+
+ conf->sortlistnxt++;
+
+ if (delim == EOF || delim == '\n') {
+ break;
+ } else {
+ delim = getword(fp, word, sizeof(word));
+ }
+ }
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+resconf_optionnumber(const char *word, uint8_t *number) {
+ char *p;
+ long n;
+
+ n = strtol(word, &p, 10);
+ if (*p != '\0') { /* Bad string. */
+ return (ISC_R_UNEXPECTEDTOKEN);
+ }
+ if (n < 0 || n > 0xff) { /* Out of range. */
+ return (ISC_R_RANGE);
+ }
+ *number = n;
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+resconf_parseoption(irs_resconf_t *conf, FILE *fp) {
+ int delim;
+ isc_result_t result = ISC_R_SUCCESS;
+ char word[RESCONFMAXLINELEN];
+
+ delim = getword(fp, word, sizeof(word));
+ if (strlen(word) == 0U) {
+ return (ISC_R_UNEXPECTEDEND); /* Empty line after keyword. */
+ }
+
+ while (strlen(word) > 0U) {
+ if (strcmp("debug", word) == 0) {
+ conf->resdebug = 1;
+ } else if (strncmp("ndots:", word, 6) == 0) {
+ CHECK(resconf_optionnumber(word + 6, &conf->ndots));
+ } else if (strncmp("attempts:", word, 9) == 0) {
+ CHECK(resconf_optionnumber(word + 9, &conf->attempts));
+ } else if (strncmp("timeout:", word, 8) == 0) {
+ CHECK(resconf_optionnumber(word + 8, &conf->timeout));
+ }
+
+ if (delim == EOF || delim == '\n') {
+ break;
+ } else {
+ delim = getword(fp, word, sizeof(word));
+ }
+ }
+
+cleanup:
+ return (result);
+}
+
+static isc_result_t
+add_search(irs_resconf_t *conf, char *domain) {
+ irs_resconf_search_t *entry;
+
+ entry = isc_mem_get(conf->mctx, sizeof(*entry));
+
+ entry->domain = domain;
+ ISC_LINK_INIT(entry, link);
+ ISC_LIST_APPEND(conf->searchlist, entry, link);
+
+ return (ISC_R_SUCCESS);
+}
+
+/*% parses a file and fills in the data structure. */
+isc_result_t
+irs_resconf_load(isc_mem_t *mctx, const char *filename, irs_resconf_t **confp) {
+ FILE *fp = NULL;
+ char word[256];
+ isc_result_t rval, ret = ISC_R_SUCCESS;
+ irs_resconf_t *conf;
+ unsigned int i;
+ int stopchar;
+
+ REQUIRE(mctx != NULL);
+ REQUIRE(filename != NULL);
+ REQUIRE(strlen(filename) > 0U);
+ REQUIRE(confp != NULL && *confp == NULL);
+
+ conf = isc_mem_get(mctx, sizeof(*conf));
+
+ conf->mctx = mctx;
+ ISC_LIST_INIT(conf->nameservers);
+ ISC_LIST_INIT(conf->searchlist);
+ conf->numns = 0;
+ conf->domainname = NULL;
+ conf->searchnxt = 0;
+ conf->sortlistnxt = 0;
+ conf->resdebug = 0;
+ conf->ndots = 1;
+ conf->attempts = 3;
+ conf->timeout = 0;
+ for (i = 0; i < RESCONFMAXSEARCH; i++) {
+ conf->search[i] = NULL;
+ }
+
+ errno = 0;
+ if ((fp = fopen(filename, "r")) != NULL) {
+ do {
+ stopchar = getword(fp, word, sizeof(word));
+ if (stopchar == EOF) {
+ rval = ISC_R_SUCCESS;
+ POST(rval);
+ break;
+ }
+
+ if (strlen(word) == 0U) {
+ rval = ISC_R_SUCCESS;
+ } else if (strcmp(word, "nameserver") == 0) {
+ rval = resconf_parsenameserver(conf, fp);
+ } else if (strcmp(word, "domain") == 0) {
+ rval = resconf_parsedomain(conf, fp);
+ } else if (strcmp(word, "search") == 0) {
+ rval = resconf_parsesearch(conf, fp);
+ } else if (strcmp(word, "sortlist") == 0) {
+ rval = resconf_parsesortlist(conf, fp);
+ } else if (strcmp(word, "options") == 0) {
+ rval = resconf_parseoption(conf, fp);
+ } else {
+ /* unrecognised word. Ignore entire line */
+ rval = ISC_R_SUCCESS;
+ stopchar = eatline(fp);
+ if (stopchar == EOF) {
+ break;
+ }
+ }
+ if (ret == ISC_R_SUCCESS && rval != ISC_R_SUCCESS) {
+ ret = rval;
+ }
+ } while (1);
+
+ fclose(fp);
+ } else {
+ switch (errno) {
+ case ENOENT:
+ break;
+ default:
+ isc_mem_put(mctx, conf, sizeof(*conf));
+ return (ISC_R_INVALIDFILE);
+ }
+ }
+
+ if (ret != ISC_R_SUCCESS) {
+ goto error;
+ }
+
+ /*
+ * Construct unified search list from domain or configured
+ * search list
+ */
+ if (conf->domainname != NULL) {
+ ret = add_search(conf, conf->domainname);
+ } else if (conf->searchnxt > 0) {
+ for (i = 0; i < conf->searchnxt; i++) {
+ ret = add_search(conf, conf->search[i]);
+ if (ret != ISC_R_SUCCESS) {
+ break;
+ }
+ }
+ }
+
+ /* If we don't find a nameserver fall back to localhost */
+ if (conf->numns == 0U) {
+ INSIST(ISC_LIST_EMPTY(conf->nameservers));
+
+ /* XXX: should we catch errors? */
+ (void)add_server(conf->mctx, "::1", &conf->nameservers);
+ (void)add_server(conf->mctx, "127.0.0.1", &conf->nameservers);
+ }
+
+error:
+ conf->magic = IRS_RESCONF_MAGIC;
+
+ if (ret != ISC_R_SUCCESS) {
+ irs_resconf_destroy(&conf);
+ } else {
+ if (fp == NULL) {
+ ret = ISC_R_FILENOTFOUND;
+ }
+ *confp = conf;
+ }
+
+ return (ret);
+}
+
+void
+irs_resconf_destroy(irs_resconf_t **confp) {
+ irs_resconf_t *conf;
+ isc_sockaddr_t *address;
+ irs_resconf_search_t *searchentry;
+ unsigned int i;
+
+ REQUIRE(confp != NULL);
+ conf = *confp;
+ *confp = NULL;
+ REQUIRE(IRS_RESCONF_VALID(conf));
+
+ while ((searchentry = ISC_LIST_HEAD(conf->searchlist)) != NULL) {
+ ISC_LIST_UNLINK(conf->searchlist, searchentry, link);
+ isc_mem_put(conf->mctx, searchentry, sizeof(*searchentry));
+ }
+
+ while ((address = ISC_LIST_HEAD(conf->nameservers)) != NULL) {
+ ISC_LIST_UNLINK(conf->nameservers, address, link);
+ isc_mem_put(conf->mctx, address, sizeof(*address));
+ }
+
+ if (conf->domainname != NULL) {
+ isc_mem_free(conf->mctx, conf->domainname);
+ }
+
+ for (i = 0; i < RESCONFMAXSEARCH; i++) {
+ if (conf->search[i] != NULL) {
+ isc_mem_free(conf->mctx, conf->search[i]);
+ }
+ }
+
+ isc_mem_put(conf->mctx, conf, sizeof(*conf));
+}
+
+isc_sockaddrlist_t *
+irs_resconf_getnameservers(irs_resconf_t *conf) {
+ REQUIRE(IRS_RESCONF_VALID(conf));
+
+ return (&conf->nameservers);
+}
+
+irs_resconf_searchlist_t *
+irs_resconf_getsearchlist(irs_resconf_t *conf) {
+ REQUIRE(IRS_RESCONF_VALID(conf));
+
+ return (&conf->searchlist);
+}
+
+unsigned int
+irs_resconf_getndots(irs_resconf_t *conf) {
+ REQUIRE(IRS_RESCONF_VALID(conf));
+
+ return ((unsigned int)conf->ndots);
+}
+
+unsigned int
+irs_resconf_getattempts(irs_resconf_t *conf) {
+ REQUIRE(IRS_RESCONF_VALID(conf));
+
+ return ((unsigned int)conf->attempts);
+}
+
+unsigned int
+irs_resconf_gettimeout(irs_resconf_t *conf) {
+ REQUIRE(IRS_RESCONF_VALID(conf));
+
+ return ((unsigned int)conf->timeout);
+}