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-rw-r--r--tests-fuzz/Makefile.am130
-rw-r--r--tests-fuzz/Makefile.in1498
-rw-r--r--tests-fuzz/README.md59
-rw-r--r--tests-fuzz/fuzz_dname_from_str.c39
-rw-r--r--tests-fuzz/fuzz_dname_to_str.c31
-rw-r--r--tests-fuzz/fuzz_packet.c33
-rw-r--r--tests-fuzz/fuzz_zscanner.c31
-rw-r--r--tests-fuzz/knotd_wrap/afl-loop.h21
-rw-r--r--tests-fuzz/knotd_wrap/server.c29
-rw-r--r--tests-fuzz/knotd_wrap/tcp-handler.c25
-rw-r--r--tests-fuzz/knotd_wrap/udp-handler.c117
-rw-r--r--tests-fuzz/main.c140
12 files changed, 2153 insertions, 0 deletions
diff --git a/tests-fuzz/Makefile.am b/tests-fuzz/Makefile.am
new file mode 100644
index 0000000..dcf18a6
--- /dev/null
+++ b/tests-fuzz/Makefile.am
@@ -0,0 +1,130 @@
+AM_CPPFLAGS = \
+ -include $(top_builddir)/src/config.h \
+ -I$(top_srcdir)/src \
+ -DCONFIG_DIR='"${config_dir}"' \
+ -DSTORAGE_DIR='"${storage_dir}"' \
+ -DRUN_DIR='"${run_dir}"' \
+ -DSRCDIR=\"$(abs_srcdir)\"
+
+FUZZERS = \
+ fuzz_packet \
+ fuzz_zscanner \
+ fuzz_dname_to_str \
+ fuzz_dname_from_str
+
+check_PROGRAMS = $(FUZZERS)
+
+if HAVE_DAEMON
+# knotd_stdio (AFL)
+check_PROGRAMS += knotd_stdio
+
+nodist_knotd_stdio_SOURCES = knotd_wrap/main.c
+
+knotd_stdio_SOURCES = \
+ knotd_wrap/afl-loop.h \
+ knotd_wrap/server.c \
+ knotd_wrap/tcp-handler.c \
+ knotd_wrap/udp-handler.c
+
+knotd_stdio_CPPFLAGS = \
+ $(AM_CPPFLAGS) \
+ $(libkqueue_CFLAGS) \
+ $(liburcu_CFLAGS) \
+ $(lmdb_CFLAGS) \
+ $(systemd_CFLAGS)
+
+knotd_stdio_LDADD = \
+ $(top_builddir)/src/libknotd.la \
+ $(top_builddir)/src/libknot.la \
+ $(top_builddir)/src/libdnssec.la \
+ $(top_builddir)/src/libcontrib.la \
+ $(top_builddir)/src/libzscanner.la \
+ $(cap_ng_LIBS) \
+ $(gnutls_LIBS) \
+ $(liburcu_LIBS) \
+ $(lmdb_LIBS) \
+ $(systemd_LIBS)
+
+BUILT_SOURCES = knotd_wrap/main.c
+CLEANFILES = knotd_wrap/main.c
+knotd_wrap/main.c: $(top_builddir)/src/utils/knotd/main.c
+ @echo '#include "knotd_wrap/afl-loop.h"' > $@
+ @$(SED) -e 's/for (;;)/while (__AFL_LOOP(10000))/' $(top_srcdir)/src/utils/knotd/main.c >> $@
+endif HAVE_DAEMON
+
+# Simple function wrappers (AFL, libFuzzer, tests)
+
+fuzz_packet_SOURCES = fuzz_packet.c
+fuzz_packet_CPPFLAGS = $(AM_CPPFLAGS)
+fuzz_packet_LDADD = \
+ $(top_builddir)/src/libknot.la \
+ $(top_builddir)/src/libdnssec.la \
+ $(top_builddir)/src/libcontrib.la \
+ $(lmdb_LIBS)
+
+fuzz_zscanner_SOURCES = fuzz_zscanner.c
+fuzz_zscanner_CPPFLAGS = $(AM_CPPFLAGS)
+fuzz_zscanner_LDADD = \
+ $(top_builddir)/src/libzscanner.la
+
+fuzz_dname_to_str_SOURCES = fuzz_dname_to_str.c
+fuzz_dname_to_str_CPPFLAGS = $(AM_CPPFLAGS)
+fuzz_dname_to_str_LDADD = \
+ $(top_builddir)/src/libknot.la \
+ $(top_builddir)/src/libdnssec.la \
+ $(top_builddir)/src/libcontrib.la \
+ $(lmdb_LIBS)
+
+fuzz_dname_from_str_SOURCES = fuzz_dname_from_str.c
+fuzz_dname_from_str_CPPFLAGS = $(AM_CPPFLAGS)
+fuzz_dname_from_str_LDADD = \
+ $(top_builddir)/src/libknot.la \
+ $(top_builddir)/src/libdnssec.la \
+ $(top_builddir)/src/libcontrib.la \
+ $(lmdb_LIBS)
+
+if OSS_FUZZ
+
+# CFLAGS, LDFLAGS, etc. are defined by the oss-fuzz environment; just link
+# in the fuzzing engine
+
+fuzz_packet_LDADD += ${LIB_FUZZING_ENGINE} -lc++
+fuzz_zscanner_LDADD += ${LIB_FUZZING_ENGINE} -lc++
+fuzz_dname_to_str_LDADD += ${LIB_FUZZING_ENGINE} -lc++
+fuzz_dname_from_str_LDADD += ${LIB_FUZZING_ENGINE} -lc++
+
+else
+
+if FUZZER
+
+fuzz_packet_CPPFLAGS += ${fuzzer_CFLAGS}
+fuzz_packet_LDFLAGS = ${fuzzer_LDFLAGS}
+
+fuzz_zscanner_CPPFLAGS += ${fuzzer_CFLAGS}
+fuzz_zscanner_LDFLAGS = ${fuzzer_LDFLAGS}
+
+fuzz_dname_to_str_CPPFLAGS += ${fuzzer_CFLAGS}
+fuzz_dname_to_str_LDFLAGS = ${fuzzer_LDFLAGS}
+
+fuzz_dname_from_str_CPPFLAGS += ${fuzzer_CFLAGS}
+fuzz_dname_from_str_LDFLAGS = ${fuzzer_LDFLAGS}
+
+# Ensure that fuzzers execute successfully with a benign input
+
+TESTS = check/check_fuzzers.test
+EXTRA_DIST = check/check_fuzzers.test
+
+else
+
+fuzz_packet_SOURCES += main.c
+fuzz_zscanner_SOURCES += main.c
+fuzz_dname_to_str_SOURCES += main.c
+fuzz_dname_from_str_SOURCES += main.c
+
+TESTS = $(FUZZERS)
+
+endif # if FUZZER
+
+endif # if OSS_FUZZ
+
+check-compile: $(check_PROGRAMS)
diff --git a/tests-fuzz/Makefile.in b/tests-fuzz/Makefile.in
new file mode 100644
index 0000000..7c94673
--- /dev/null
+++ b/tests-fuzz/Makefile.in
@@ -0,0 +1,1498 @@
+# Makefile.in generated by automake 1.16.5 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+VPATH = @srcdir@
+am__is_gnu_make = { \
+ if test -z '$(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 $$MAKEFLAGS in \
+ *\\[\ \ ]*) \
+ bs=\\; \
+ sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+ | sed "s/$$bs$$bs[$$bs $$bs ]*//g"`;; \
+ esac; \
+ fi; \
+ skip_next=no; \
+ strip_trailopt () \
+ { \
+ flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+ }; \
+ for flg in $$sane_makeflags; do \
+ test $$skip_next = yes && { skip_next=no; continue; }; \
+ case $$flg in \
+ *=*|--*) continue;; \
+ -*I) strip_trailopt 'I'; skip_next=yes;; \
+ -*I?*) strip_trailopt 'I';; \
+ -*O) strip_trailopt 'O'; skip_next=yes;; \
+ -*O?*) strip_trailopt 'O';; \
+ -*l) strip_trailopt 'l'; skip_next=yes;; \
+ -*l?*) strip_trailopt 'l';; \
+ -[dEDm]) skip_next=yes;; \
+ -[JT]) skip_next=yes;; \
+ esac; \
+ case $$flg in \
+ *$$target_option*) has_opt=yes; break;; \
+ esac; \
+ done; \
+ test $$has_opt = yes
+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
+am__make_keepgoing = (target_option=k; $(am__make_running_with_option))
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+check_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2)
+
+# knotd_stdio (AFL)
+@HAVE_DAEMON_TRUE@am__append_1 = knotd_stdio
+
+# CFLAGS, LDFLAGS, etc. are defined by the oss-fuzz environment; just link
+# in the fuzzing engine
+@OSS_FUZZ_TRUE@am__append_2 = ${LIB_FUZZING_ENGINE} -lc++
+@OSS_FUZZ_TRUE@am__append_3 = ${LIB_FUZZING_ENGINE} -lc++
+@OSS_FUZZ_TRUE@am__append_4 = ${LIB_FUZZING_ENGINE} -lc++
+@OSS_FUZZ_TRUE@am__append_5 = ${LIB_FUZZING_ENGINE} -lc++
+@FUZZER_TRUE@@OSS_FUZZ_FALSE@am__append_6 = ${fuzzer_CFLAGS}
+@FUZZER_TRUE@@OSS_FUZZ_FALSE@am__append_7 = ${fuzzer_CFLAGS}
+@FUZZER_TRUE@@OSS_FUZZ_FALSE@am__append_8 = ${fuzzer_CFLAGS}
+@FUZZER_TRUE@@OSS_FUZZ_FALSE@am__append_9 = ${fuzzer_CFLAGS}
+@FUZZER_FALSE@@OSS_FUZZ_FALSE@TESTS = $(am__EXEEXT_1)
+@FUZZER_TRUE@@OSS_FUZZ_FALSE@TESTS = check/check_fuzzers.test
+@FUZZER_FALSE@@OSS_FUZZ_FALSE@am__append_10 = main.c
+@FUZZER_FALSE@@OSS_FUZZ_FALSE@am__append_11 = main.c
+@FUZZER_FALSE@@OSS_FUZZ_FALSE@am__append_12 = main.c
+@FUZZER_FALSE@@OSS_FUZZ_FALSE@am__append_13 = main.c
+subdir = tests-fuzz
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+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/knot-lib-version.m4 \
+ $(top_srcdir)/m4/knot-module.m4 $(top_srcdir)/m4/libtool.m4 \
+ $(top_srcdir)/m4/ltoptions.m4 $(top_srcdir)/m4/ltsugar.m4 \
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+ $(top_srcdir)/m4/knot-version.m4 $(top_srcdir)/configure.ac
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+ fuzz_dname_to_str$(EXEEXT) fuzz_dname_from_str$(EXEEXT)
+@HAVE_DAEMON_TRUE@am__EXEEXT_2 = knotd_stdio$(EXEEXT)
+am__fuzz_dname_from_str_SOURCES_DIST = fuzz_dname_from_str.c main.c
+@FUZZER_FALSE@@OSS_FUZZ_FALSE@am__objects_1 = fuzz_dname_from_str-main.$(OBJEXT)
+am_fuzz_dname_from_str_OBJECTS = \
+ fuzz_dname_from_str-fuzz_dname_from_str.$(OBJEXT) \
+ $(am__objects_1)
+fuzz_dname_from_str_OBJECTS = $(am_fuzz_dname_from_str_OBJECTS)
+am__DEPENDENCIES_1 =
+fuzz_dname_from_str_DEPENDENCIES = $(top_builddir)/src/libknot.la \
+ $(top_builddir)/src/libdnssec.la \
+ $(top_builddir)/src/libcontrib.la $(am__DEPENDENCIES_1) \
+ $(am__DEPENDENCIES_1)
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+am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
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+ $(AM_CFLAGS) $(CFLAGS) $(fuzz_dname_from_str_LDFLAGS) \
+ $(LDFLAGS) -o $@
+am__fuzz_dname_to_str_SOURCES_DIST = fuzz_dname_to_str.c main.c
+@FUZZER_FALSE@@OSS_FUZZ_FALSE@am__objects_2 = fuzz_dname_to_str-main.$(OBJEXT)
+am_fuzz_dname_to_str_OBJECTS = \
+ fuzz_dname_to_str-fuzz_dname_to_str.$(OBJEXT) $(am__objects_2)
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+fuzz_dname_to_str_DEPENDENCIES = $(top_builddir)/src/libknot.la \
+ $(top_builddir)/src/libdnssec.la \
+ $(top_builddir)/src/libcontrib.la $(am__DEPENDENCIES_1) \
+ $(am__DEPENDENCIES_1)
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+ $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CCLD) \
+ $(AM_CFLAGS) $(CFLAGS) $(fuzz_dname_to_str_LDFLAGS) $(LDFLAGS) \
+ -o $@
+am__fuzz_packet_SOURCES_DIST = fuzz_packet.c main.c
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+ $(top_builddir)/src/libcontrib.la $(am__DEPENDENCIES_1) \
+ $(am__DEPENDENCIES_1)
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+ $(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
+ $(fuzz_packet_LDFLAGS) $(LDFLAGS) -o $@
+am__fuzz_zscanner_SOURCES_DIST = fuzz_zscanner.c main.c
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+am__knotd_stdio_SOURCES_DIST = knotd_wrap/afl-loop.h \
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+ }
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+# the '.log' extension removed). The result is saved in the shell variable
+# '$bases'. This honors runtime overriding of TESTS and TEST_LOGS. Sadly,
+# we cannot use something simpler, involving e.g., "$(TEST_LOGS:.log=)",
+# since that might cause problem with VPATH rewrites for suffix-less tests.
+# See also 'test-harness-vpath-rewrite.sh' and 'test-trs-basic.sh'.
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+AM_TESTSUITE_SUMMARY_HEADER = ' for $(PACKAGE_STRING)'
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+LOG_COMPILE = $(LOG_COMPILER) $(AM_LOG_FLAGS) $(LOG_FLAGS)
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+ case '$@' in \
+ */*) \
+ case '$*' in \
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+ *) b=`echo '$@' | sed 's/\.log$$//'`; \
+ esac;; \
+ *) \
+ b='$*';; \
+ esac
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+am__test_logs2 = $(am__test_logs1:@EXEEXT@.log=.log)
+TEST_LOGS = $(am__test_logs2:.test.log=.log)
+TEST_LOG_DRIVER = $(SHELL) $(top_srcdir)/test-driver
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+am__DIST_COMMON = $(srcdir)/Makefile.in $(top_srcdir)/depcomp \
+ $(top_srcdir)/test-driver README.md
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+ACLOCAL = @ACLOCAL@
+AMTAR = @AMTAR@
+AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
+AR = @AR@
+AUTOCONF = @AUTOCONF@
+AUTOHEADER = @AUTOHEADER@
+AUTOMAKE = @AUTOMAKE@
+AWK = @AWK@
+CC = @CC@
+CCDEPMODE = @CCDEPMODE@
+CFLAGS = @CFLAGS@
+CFLAG_VISIBILITY = @CFLAG_VISIBILITY@
+CODE_COVERAGE_ENABLED = @CODE_COVERAGE_ENABLED@
+CPP = @CPP@
+CPPFLAGS = @CPPFLAGS@
+CSCOPE = @CSCOPE@
+CTAGS = @CTAGS@
+CYGPATH_W = @CYGPATH_W@
+DEFS = @DEFS@
+DEPDIR = @DEPDIR@
+DLLTOOL = @DLLTOOL@
+DNSTAP_CFLAGS = @DNSTAP_CFLAGS@
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+INSTALL_DATA = @INSTALL_DATA@
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+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
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+LT_NO_UNDEFINED = @LT_NO_UNDEFINED@
+LT_SYS_LIBRARY_PATH = @LT_SYS_LIBRARY_PATH@
+MAKEINFO = @MAKEINFO@
+MANIFEST_TOOL = @MANIFEST_TOOL@
+MKDIR_P = @MKDIR_P@
+NM = @NM@
+NMEDIT = @NMEDIT@
+OBJDUMP = @OBJDUMP@
+OBJEXT = @OBJEXT@
+OTOOL = @OTOOL@
+OTOOL64 = @OTOOL64@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PDFLATEX = @PDFLATEX@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
+PROTOC_C = @PROTOC_C@
+RANLIB = @RANLIB@
+RELEASE_DATE = @RELEASE_DATE@
+SED = @SED@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+SPHINXBUILD = @SPHINXBUILD@
+STRIP = @STRIP@
+VERSION = @VERSION@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_ct_AR = @ac_ct_AR@
+ac_ct_CC = @ac_ct_CC@
+ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
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+am__leading_dot = @am__leading_dot@
+am__quote = @am__quote@
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+build = @build@
+build_alias = @build_alias@
+build_cpu = @build_cpu@
+build_os = @build_os@
+build_vendor = @build_vendor@
+builddir = @builddir@
+cap_ng_CFLAGS = @cap_ng_CFLAGS@
+cap_ng_LIBS = @cap_ng_LIBS@
+conf_mapsize = @conf_mapsize@
+config_dir = @config_dir@
+datadir = @datadir@
+datarootdir = @datarootdir@
+dlopen_LIBS = @dlopen_LIBS@
+docdir = @docdir@
+dvidir = @dvidir@
+embedded_libngtcp2_CFLAGS = @embedded_libngtcp2_CFLAGS@
+embedded_libngtcp2_LIBS = @embedded_libngtcp2_LIBS@
+exec_prefix = @exec_prefix@
+fuzzer_CFLAGS = @fuzzer_CFLAGS@
+fuzzer_LDFLAGS = @fuzzer_LDFLAGS@
+gnutls_CFLAGS = @gnutls_CFLAGS@
+gnutls_LIBS = @gnutls_LIBS@
+host = @host@
+host_alias = @host_alias@
+host_cpu = @host_cpu@
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+host_vendor = @host_vendor@
+htmldir = @htmldir@
+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
+libbpf_CFLAGS = @libbpf_CFLAGS@
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+libdir = @libdir@
+libdnssec_SONAME = @libdnssec_SONAME@
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+libdnssec_VERSION_INFO = @libdnssec_VERSION_INFO@
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+libidn2_CFLAGS = @libidn2_CFLAGS@
+libidn2_LIBS = @libidn2_LIBS@
+libidn_CFLAGS = @libidn_CFLAGS@
+libidn_LIBS = @libidn_LIBS@
+libknot_SONAME = @libknot_SONAME@
+libknot_SOVERSION = @libknot_SOVERSION@
+libknot_VERSION_INFO = @libknot_VERSION_INFO@
+libkqueue_CFLAGS = @libkqueue_CFLAGS@
+libkqueue_LIBS = @libkqueue_LIBS@
+libmaxminddb_CFLAGS = @libmaxminddb_CFLAGS@
+libmaxminddb_LIBS = @libmaxminddb_LIBS@
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+libmnl_LIBS = @libmnl_LIBS@
+libnghttp2_CFLAGS = @libnghttp2_CFLAGS@
+libnghttp2_LIBS = @libnghttp2_LIBS@
+libngtcp2_CFLAGS = @libngtcp2_CFLAGS@
+libngtcp2_LIBS = @libngtcp2_LIBS@
+libprotobuf_c_CFLAGS = @libprotobuf_c_CFLAGS@
+libprotobuf_c_LIBS = @libprotobuf_c_LIBS@
+liburcu_CFLAGS = @liburcu_CFLAGS@
+liburcu_LIBS = @liburcu_LIBS@
+liburcu_PKGCONFIG = @liburcu_PKGCONFIG@
+libxdp_CFLAGS = @libxdp_CFLAGS@
+libxdp_LIBS = @libxdp_LIBS@
+libzscanner_SONAME = @libzscanner_SONAME@
+libzscanner_SOVERSION = @libzscanner_SOVERSION@
+libzscanner_VERSION_INFO = @libzscanner_VERSION_INFO@
+lmdb_CFLAGS = @lmdb_CFLAGS@
+lmdb_LIBS = @lmdb_LIBS@
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+localstatedir = @localstatedir@
+malloc_LIBS = @malloc_LIBS@
+mandir = @mandir@
+math_LIBS = @math_LIBS@
+mkdir_p = @mkdir_p@
+module_dir = @module_dir@
+module_instdir = @module_instdir@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
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+storage_dir = @storage_dir@
+sysconfdir = @sysconfdir@
+systemd_CFLAGS = @systemd_CFLAGS@
+systemd_LIBS = @systemd_LIBS@
+target_alias = @target_alias@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+AM_CPPFLAGS = \
+ -include $(top_builddir)/src/config.h \
+ -I$(top_srcdir)/src \
+ -DCONFIG_DIR='"${config_dir}"' \
+ -DSTORAGE_DIR='"${storage_dir}"' \
+ -DRUN_DIR='"${run_dir}"' \
+ -DSRCDIR=\"$(abs_srcdir)\"
+
+FUZZERS = \
+ fuzz_packet \
+ fuzz_zscanner \
+ fuzz_dname_to_str \
+ fuzz_dname_from_str
+
+@HAVE_DAEMON_TRUE@nodist_knotd_stdio_SOURCES = knotd_wrap/main.c
+@HAVE_DAEMON_TRUE@knotd_stdio_SOURCES = \
+@HAVE_DAEMON_TRUE@ knotd_wrap/afl-loop.h \
+@HAVE_DAEMON_TRUE@ knotd_wrap/server.c \
+@HAVE_DAEMON_TRUE@ knotd_wrap/tcp-handler.c \
+@HAVE_DAEMON_TRUE@ knotd_wrap/udp-handler.c
+
+@HAVE_DAEMON_TRUE@knotd_stdio_CPPFLAGS = \
+@HAVE_DAEMON_TRUE@ $(AM_CPPFLAGS) \
+@HAVE_DAEMON_TRUE@ $(libkqueue_CFLAGS) \
+@HAVE_DAEMON_TRUE@ $(liburcu_CFLAGS) \
+@HAVE_DAEMON_TRUE@ $(lmdb_CFLAGS) \
+@HAVE_DAEMON_TRUE@ $(systemd_CFLAGS)
+
+@HAVE_DAEMON_TRUE@knotd_stdio_LDADD = \
+@HAVE_DAEMON_TRUE@ $(top_builddir)/src/libknotd.la \
+@HAVE_DAEMON_TRUE@ $(top_builddir)/src/libknot.la \
+@HAVE_DAEMON_TRUE@ $(top_builddir)/src/libdnssec.la \
+@HAVE_DAEMON_TRUE@ $(top_builddir)/src/libcontrib.la \
+@HAVE_DAEMON_TRUE@ $(top_builddir)/src/libzscanner.la \
+@HAVE_DAEMON_TRUE@ $(cap_ng_LIBS) \
+@HAVE_DAEMON_TRUE@ $(gnutls_LIBS) \
+@HAVE_DAEMON_TRUE@ $(liburcu_LIBS) \
+@HAVE_DAEMON_TRUE@ $(lmdb_LIBS) \
+@HAVE_DAEMON_TRUE@ $(systemd_LIBS)
+
+@HAVE_DAEMON_TRUE@BUILT_SOURCES = knotd_wrap/main.c
+@HAVE_DAEMON_TRUE@CLEANFILES = knotd_wrap/main.c
+
+# Simple function wrappers (AFL, libFuzzer, tests)
+fuzz_packet_SOURCES = fuzz_packet.c $(am__append_10)
+fuzz_packet_CPPFLAGS = $(AM_CPPFLAGS) $(am__append_6)
+fuzz_packet_LDADD = $(top_builddir)/src/libknot.la \
+ $(top_builddir)/src/libdnssec.la \
+ $(top_builddir)/src/libcontrib.la $(lmdb_LIBS) $(am__append_2)
+fuzz_zscanner_SOURCES = fuzz_zscanner.c $(am__append_11)
+fuzz_zscanner_CPPFLAGS = $(AM_CPPFLAGS) $(am__append_7)
+fuzz_zscanner_LDADD = $(top_builddir)/src/libzscanner.la \
+ $(am__append_3)
+fuzz_dname_to_str_SOURCES = fuzz_dname_to_str.c $(am__append_12)
+fuzz_dname_to_str_CPPFLAGS = $(AM_CPPFLAGS) $(am__append_8)
+fuzz_dname_to_str_LDADD = $(top_builddir)/src/libknot.la \
+ $(top_builddir)/src/libdnssec.la \
+ $(top_builddir)/src/libcontrib.la $(lmdb_LIBS) $(am__append_4)
+fuzz_dname_from_str_SOURCES = fuzz_dname_from_str.c $(am__append_13)
+fuzz_dname_from_str_CPPFLAGS = $(AM_CPPFLAGS) $(am__append_9)
+fuzz_dname_from_str_LDADD = $(top_builddir)/src/libknot.la \
+ $(top_builddir)/src/libdnssec.la \
+ $(top_builddir)/src/libcontrib.la $(lmdb_LIBS) $(am__append_5)
+@FUZZER_TRUE@@OSS_FUZZ_FALSE@fuzz_packet_LDFLAGS = ${fuzzer_LDFLAGS}
+@FUZZER_TRUE@@OSS_FUZZ_FALSE@fuzz_zscanner_LDFLAGS = ${fuzzer_LDFLAGS}
+@FUZZER_TRUE@@OSS_FUZZ_FALSE@fuzz_dname_to_str_LDFLAGS = ${fuzzer_LDFLAGS}
+@FUZZER_TRUE@@OSS_FUZZ_FALSE@fuzz_dname_from_str_LDFLAGS = ${fuzzer_LDFLAGS}
+@FUZZER_TRUE@@OSS_FUZZ_FALSE@EXTRA_DIST = check/check_fuzzers.test
+all: $(BUILT_SOURCES)
+ $(MAKE) $(AM_MAKEFLAGS) all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .lo .log .o .obj .test .test$(EXEEXT) .trs
+$(srcdir)/Makefile.in: $(srcdir)/Makefile.am $(am__configure_deps)
+ @for dep in $?; do \
+ case '$(am__configure_deps)' in \
+ *$$dep*) \
+ ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+ && { if test -f $@; then exit 0; else break; fi; }; \
+ exit 1;; \
+ esac; \
+ done; \
+ echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign tests-fuzz/Makefile'; \
+ $(am__cd) $(top_srcdir) && \
+ $(AUTOMAKE) --foreign tests-fuzz/Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+ @case '$?' in \
+ *config.status*) \
+ cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+ *) \
+ echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles)'; \
+ cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles);; \
+ esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+ cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: $(am__configure_deps)
+ cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): $(am__aclocal_m4_deps)
+ cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+clean-checkPROGRAMS:
+ @list='$(check_PROGRAMS)'; test -n "$$list" || exit 0; \
+ echo " rm -f" $$list; \
+ rm -f $$list || exit $$?; \
+ test -n "$(EXEEXT)" || exit 0; \
+ list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+ echo " rm -f" $$list; \
+ rm -f $$list
+
+fuzz_dname_from_str$(EXEEXT): $(fuzz_dname_from_str_OBJECTS) $(fuzz_dname_from_str_DEPENDENCIES) $(EXTRA_fuzz_dname_from_str_DEPENDENCIES)
+ @rm -f fuzz_dname_from_str$(EXEEXT)
+ $(AM_V_CCLD)$(fuzz_dname_from_str_LINK) $(fuzz_dname_from_str_OBJECTS) $(fuzz_dname_from_str_LDADD) $(LIBS)
+
+fuzz_dname_to_str$(EXEEXT): $(fuzz_dname_to_str_OBJECTS) $(fuzz_dname_to_str_DEPENDENCIES) $(EXTRA_fuzz_dname_to_str_DEPENDENCIES)
+ @rm -f fuzz_dname_to_str$(EXEEXT)
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+ $$success || exit 1
+
+check-TESTS: $(check_PROGRAMS)
+ @list='$(RECHECK_LOGS)'; test -z "$$list" || rm -f $$list
+ @list='$(RECHECK_LOGS:.log=.trs)'; test -z "$$list" || rm -f $$list
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+ log_list=`for i in $$bases; do echo $$i.log; done`; \
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+ log_list=`echo $$log_list`; trs_list=`echo $$trs_list`; \
+ $(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) TEST_LOGS="$$log_list"; \
+ exit $$?;
+recheck: all $(check_PROGRAMS)
+ @test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+ @set +e; $(am__set_TESTS_bases); \
+ bases=`for i in $$bases; do echo $$i; done \
+ | $(am__list_recheck_tests)` || exit 1; \
+ log_list=`for i in $$bases; do echo $$i.log; done`; \
+ log_list=`echo $$log_list`; \
+ $(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) \
+ am__force_recheck=am--force-recheck \
+ TEST_LOGS="$$log_list"; \
+ exit $$?
+fuzz_packet.log: fuzz_packet$(EXEEXT)
+ @p='fuzz_packet$(EXEEXT)'; \
+ b='fuzz_packet'; \
+ $(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+ --log-file $$b.log --trs-file $$b.trs \
+ $(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+ "$$tst" $(AM_TESTS_FD_REDIRECT)
+fuzz_zscanner.log: fuzz_zscanner$(EXEEXT)
+ @p='fuzz_zscanner$(EXEEXT)'; \
+ b='fuzz_zscanner'; \
+ $(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+ --log-file $$b.log --trs-file $$b.trs \
+ $(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
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+fuzz_dname_to_str.log: fuzz_dname_to_str$(EXEEXT)
+ @p='fuzz_dname_to_str$(EXEEXT)'; \
+ b='fuzz_dname_to_str'; \
+ $(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
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+ "$$tst" $(AM_TESTS_FD_REDIRECT)
+fuzz_dname_from_str.log: fuzz_dname_from_str$(EXEEXT)
+ @p='fuzz_dname_from_str$(EXEEXT)'; \
+ b='fuzz_dname_from_str'; \
+ $(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+ --log-file $$b.log --trs-file $$b.trs \
+ $(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+ "$$tst" $(AM_TESTS_FD_REDIRECT)
+.test.log:
+ @p='$<'; \
+ $(am__set_b); \
+ $(am__check_pre) $(TEST_LOG_DRIVER) --test-name "$$f" \
+ --log-file $$b.log --trs-file $$b.trs \
+ $(am__common_driver_flags) $(AM_TEST_LOG_DRIVER_FLAGS) $(TEST_LOG_DRIVER_FLAGS) -- $(TEST_LOG_COMPILE) \
+ "$$tst" $(AM_TESTS_FD_REDIRECT)
+@am__EXEEXT_TRUE@.test$(EXEEXT).log:
+@am__EXEEXT_TRUE@ @p='$<'; \
+@am__EXEEXT_TRUE@ $(am__set_b); \
+@am__EXEEXT_TRUE@ $(am__check_pre) $(TEST_LOG_DRIVER) --test-name "$$f" \
+@am__EXEEXT_TRUE@ --log-file $$b.log --trs-file $$b.trs \
+@am__EXEEXT_TRUE@ $(am__common_driver_flags) $(AM_TEST_LOG_DRIVER_FLAGS) $(TEST_LOG_DRIVER_FLAGS) -- $(TEST_LOG_COMPILE) \
+@am__EXEEXT_TRUE@ "$$tst" $(AM_TESTS_FD_REDIRECT)
+distdir: $(BUILT_SOURCES)
+ $(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+ @srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+ topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+ list='$(DISTFILES)'; \
+ dist_files=`for file in $$list; do echo $$file; done | \
+ sed -e "s|^$$srcdirstrip/||;t" \
+ -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+ case $$dist_files in \
+ */*) $(MKDIR_P) `echo "$$dist_files" | \
+ sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+ sort -u` ;; \
+ esac; \
+ for file in $$dist_files; do \
+ if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+ if test -d $$d/$$file; then \
+ dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+ if test -d "$(distdir)/$$file"; then \
+ find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+ fi; \
+ if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+ cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+ find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+ fi; \
+ cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+ else \
+ test -f "$(distdir)/$$file" \
+ || cp -p $$d/$$file "$(distdir)/$$file" \
+ || exit 1; \
+ fi; \
+ done
+check-am: all-am
+ $(MAKE) $(AM_MAKEFLAGS) $(check_PROGRAMS)
+ $(MAKE) $(AM_MAKEFLAGS) check-TESTS
+check: $(BUILT_SOURCES)
+ $(MAKE) $(AM_MAKEFLAGS) check-am
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+ $(MAKE) $(AM_MAKEFLAGS) install-am
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+install-data: install-data-am
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+install-am: all-am
+ @$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+ if test -z '$(STRIP)'; then \
+ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+ install; \
+ else \
+ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+ "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+ fi
+mostlyclean-generic:
+ -test -z "$(TEST_LOGS)" || rm -f $(TEST_LOGS)
+ -test -z "$(TEST_LOGS:.log=.trs)" || rm -f $(TEST_LOGS:.log=.trs)
+ -test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+
+clean-generic:
+ -test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+ -test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+ -test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+ -rm -f knotd_wrap/$(DEPDIR)/$(am__dirstamp)
+ -rm -f knotd_wrap/$(am__dirstamp)
+
+maintainer-clean-generic:
+ @echo "This command is intended for maintainers to use"
+ @echo "it deletes files that may require special tools to rebuild."
+ -test -z "$(BUILT_SOURCES)" || rm -f $(BUILT_SOURCES)
+clean: clean-am
+
+clean-am: clean-checkPROGRAMS clean-generic clean-libtool \
+ mostlyclean-am
+
+distclean: distclean-am
+ -rm -f ./$(DEPDIR)/fuzz_dname_from_str-fuzz_dname_from_str.Po
+ -rm -f ./$(DEPDIR)/fuzz_dname_from_str-main.Po
+ -rm -f ./$(DEPDIR)/fuzz_dname_to_str-fuzz_dname_to_str.Po
+ -rm -f ./$(DEPDIR)/fuzz_dname_to_str-main.Po
+ -rm -f ./$(DEPDIR)/fuzz_packet-fuzz_packet.Po
+ -rm -f ./$(DEPDIR)/fuzz_packet-main.Po
+ -rm -f ./$(DEPDIR)/fuzz_zscanner-fuzz_zscanner.Po
+ -rm -f ./$(DEPDIR)/fuzz_zscanner-main.Po
+ -rm -f knotd_wrap/$(DEPDIR)/knotd_stdio-main.Po
+ -rm -f knotd_wrap/$(DEPDIR)/knotd_stdio-server.Po
+ -rm -f knotd_wrap/$(DEPDIR)/knotd_stdio-tcp-handler.Po
+ -rm -f knotd_wrap/$(DEPDIR)/knotd_stdio-udp-handler.Po
+ -rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+ distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
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+info: info-am
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+maintainer-clean: maintainer-clean-am
+ -rm -f ./$(DEPDIR)/fuzz_dname_from_str-fuzz_dname_from_str.Po
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+ -rm -f ./$(DEPDIR)/fuzz_dname_to_str-main.Po
+ -rm -f ./$(DEPDIR)/fuzz_packet-fuzz_packet.Po
+ -rm -f ./$(DEPDIR)/fuzz_packet-main.Po
+ -rm -f ./$(DEPDIR)/fuzz_zscanner-fuzz_zscanner.Po
+ -rm -f ./$(DEPDIR)/fuzz_zscanner-main.Po
+ -rm -f knotd_wrap/$(DEPDIR)/knotd_stdio-main.Po
+ -rm -f knotd_wrap/$(DEPDIR)/knotd_stdio-server.Po
+ -rm -f knotd_wrap/$(DEPDIR)/knotd_stdio-tcp-handler.Po
+ -rm -f knotd_wrap/$(DEPDIR)/knotd_stdio-udp-handler.Po
+ -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
+
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+ps: ps-am
+
+ps-am:
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+.MAKE: all check check-am install install-am install-exec \
+ install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-TESTS \
+ check-am clean clean-checkPROGRAMS clean-generic clean-libtool \
+ cscopelist-am ctags ctags-am distclean distclean-compile \
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+.PRECIOUS: Makefile
+
+@HAVE_DAEMON_TRUE@knotd_wrap/main.c: $(top_builddir)/src/utils/knotd/main.c
+@HAVE_DAEMON_TRUE@ @echo '#include "knotd_wrap/afl-loop.h"' > $@
+@HAVE_DAEMON_TRUE@ @$(SED) -e 's/for (;;)/while (__AFL_LOOP(10000))/' $(top_srcdir)/src/utils/knotd/main.c >> $@
+
+check-compile: $(check_PROGRAMS)
+
+# 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/tests-fuzz/README.md b/tests-fuzz/README.md
new file mode 100644
index 0000000..fd39851
--- /dev/null
+++ b/tests-fuzz/README.md
@@ -0,0 +1,59 @@
+# Fuzzing stdio-wrapped knotd with [AFL](http://lcamtuf.coredump.cx/afl/)
+
+1. Ensure [Clang](https://clang.llvm.org)
+1. Ensure AFL 1.83b+ or install a fresh one
+ 1. `curl -O -L http://lcamtuf.coredump.cx/afl/releases/afl-latest.tgz`
+ 1. `tar -xzf afl-latest.tgz`
+ 1. `cd afl-*/`
+ 1. `make`
+ 1. `make -C llvm_mode`
+ 1. `sudo make install`
+1. Compile Knot DNS with `afl-clang` compiler
+ 1. `CC=afl-clang-fast ./configure --disable-shared --disable-utilities --disable-documentation`
+ 1. (Add `--with-sanitizer=address` for [ASAN](http://clang.llvm.org/docs/AddressSanitizer.html))
+ 1. `make`
+1. Try running `knotd_stdio`
+ 1. `cd tests-fuzz`
+ 1. `make check-compile`
+ 1. `mkdir -p /tmp/knotd-fuzz/rundir /tmp/knotd-fuzz/storage`
+ 1. `./knotd_stdio -c ./knotd_wrap/knot_stdio.conf`
+ 1. (Consider adding zones or modules to the configuration)
+1. Prepare an initial corpus
+ 1. Checkout the dns-fuzzing repository `git clone https://github.com/CZ-NIC/dns-fuzzing in`
+ 1. (Add more custom test cases to `in/packet/`)
+1. Minimize the tested corpus with `afl-cmin` and simple packet parser (doesn't work with ASAN!)
+ 1. `afl-cmin -i in/packet/ -o min -- ./fuzz_packet`
+1. Run the fuzzer
+ 1. `AFL_PERSISTENT=1 afl-fuzz -m 1000M -i min -o out -- ./knotd_stdio -c knotd_wrap/knot_stdio.conf`
+ 1. (Add `AFL_USE_ASAN=1` and use `-m none` if compiled with ASAN)
+ 1. (Consider parallel fuzzing, see `afl-fuzz -h`)
+
+**NOTE:** Sanitizer utilization is a bit problematical with AFL, see [notes_for_asan.txt]
+(https://github.com/mirrorer/afl/blob/master/docs/notes_for_asan.txt).
+
+# Fuzzing with [libFuzzer](https://llvm.org/docs/LibFuzzer.html) (requires Clang 6.0+)
+
+1. Ensure [Clang](https://clang.llvm.org) with `-fsanitize=fuzzer` support (e.g. [LLVM](https://apt.llvm.org))
+1. Configure with
+ 1. `./configure --with-fuzzer --disable-shared --disable-documentation`
+ 1. (You should also add `--with-sanitizer=`
+ `address` for [ASAN](http://clang.llvm.org/docs/AddressSanitizer.html) or
+ `undefined` for [UBSAN](http://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html))
+ 1. (Add proper `CC=clang-6.0` if necessary)
+1. Compile Knot DNS:
+ 1. `make`
+1. Create and check the fuzzing binaries
+ 1. `cd tests-fuzz`
+ 1. `make check`
+1. Download the corpora
+ 1. `git submodule init`
+ 1. `git submodule update --recursive --remote`
+1. (Optional) add more test cases
+ 1. `./fuzz_packet -merge=1 fuzz_packet.in <DIR_WITH_NEW_PACKET_TEST_CASES>`
+ 1. `./fuzz_zscanner -merge=1 fuzz_zscanner.in <DIR_WITH_NEW_ZSCANNER_TEST_CASES>`
+1. Run the fuzzer
+ 1. (Set proper symbolizer if necessary
+ ``export ASAN_SYMBOLIZER_PATH=$(readlink -f `which llvm-symbolizer-6.0`)`` for ASAN or
+ ``export UBSAN_SYMBOLIZER_PATH=$(readlink -f `which llvm-symbolizer-6.0`)`` for UBSAN)
+ 1. `./fuzz_packet fuzz_packet.in` or `./fuzz_zscanner fuzz_zscanner.in`
+ 1. (Add parallel fuzzing `-jobs=<CPUS>`
diff --git a/tests-fuzz/fuzz_dname_from_str.c b/tests-fuzz/fuzz_dname_from_str.c
new file mode 100644
index 0000000..518dbe5
--- /dev/null
+++ b/tests-fuzz/fuzz_dname_from_str.c
@@ -0,0 +1,39 @@
+/* Copyright (C) 2019 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "libknot/dname.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+ // Prepare 0-terminated dname string.
+ char *txt = malloc(size + 1);
+ if (txt == NULL) {
+ return 0;
+ }
+ memcpy(txt, data, size);
+ txt[size] = '\0';
+
+ // Transform the input.
+ knot_dname_storage_t dname;
+ (void)knot_dname_from_str(dname, txt, sizeof(dname));
+
+ free(txt);
+
+ return 0;
+}
diff --git a/tests-fuzz/fuzz_dname_to_str.c b/tests-fuzz/fuzz_dname_to_str.c
new file mode 100644
index 0000000..3d091a2
--- /dev/null
+++ b/tests-fuzz/fuzz_dname_to_str.c
@@ -0,0 +1,31 @@
+/* Copyright (C) 2019 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "libknot/dname.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+ // Skip invalid dnames.
+ if (knot_dname_wire_check(data, data + size, NULL) <= 0) {
+ return 0;
+ }
+
+ // Transform the input.
+ knot_dname_txt_storage_t txt;
+ (void)knot_dname_to_str(txt, (const knot_dname_t *)data, sizeof(txt));
+
+ return 0;
+}
diff --git a/tests-fuzz/fuzz_packet.c b/tests-fuzz/fuzz_packet.c
new file mode 100644
index 0000000..dff564e
--- /dev/null
+++ b/tests-fuzz/fuzz_packet.c
@@ -0,0 +1,33 @@
+/* Copyright (C) 2022 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <stdint.h>
+
+#include "libknot/libknot.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+ uint8_t copy[1 + size];
+ memcpy(copy, data, size);
+
+ knot_pkt_t *pkt = knot_pkt_new(copy, size, NULL);
+ if (pkt != NULL) {
+ knot_pkt_parse(pkt, 0);
+ knot_pkt_free(pkt);
+ }
+
+ return 0;
+}
diff --git a/tests-fuzz/fuzz_zscanner.c b/tests-fuzz/fuzz_zscanner.c
new file mode 100644
index 0000000..8ebcc53
--- /dev/null
+++ b/tests-fuzz/fuzz_zscanner.c
@@ -0,0 +1,31 @@
+/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <stdint.h>
+
+#include "libzscanner/scanner.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+ zs_scanner_t s;
+ if (zs_init(&s, ".", 1, 0) == 0 &&
+ zs_set_input_string(&s, (const char *)data, size) == 0) {
+ zs_parse_all(&s);
+ }
+ zs_deinit(&s);
+
+ return 0;
+}
diff --git a/tests-fuzz/knotd_wrap/afl-loop.h b/tests-fuzz/knotd_wrap/afl-loop.h
new file mode 100644
index 0000000..87ae9c3
--- /dev/null
+++ b/tests-fuzz/knotd_wrap/afl-loop.h
@@ -0,0 +1,21 @@
+/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#ifndef __AFL_LOOP
+#define __AFL_LOOP(x) (0)
+#endif
diff --git a/tests-fuzz/knotd_wrap/server.c b/tests-fuzz/knotd_wrap/server.c
new file mode 100644
index 0000000..fc37fbc
--- /dev/null
+++ b/tests-fuzz/knotd_wrap/server.c
@@ -0,0 +1,29 @@
+/* Copyright (C) 2021 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#define server_reconfigure orig_server_reconfigure
+#include "knot/server/server.c"
+#undef server_reconfigure
+
+extern void udp_master_init_stdio(server_t *server);
+
+int server_reconfigure(conf_t *conf, server_t *server)
+{
+ orig_server_reconfigure(conf, server);
+ udp_master_init_stdio(server);
+
+ return KNOT_EOK;
+}
diff --git a/tests-fuzz/knotd_wrap/tcp-handler.c b/tests-fuzz/knotd_wrap/tcp-handler.c
new file mode 100644
index 0000000..59b13fb
--- /dev/null
+++ b/tests-fuzz/knotd_wrap/tcp-handler.c
@@ -0,0 +1,25 @@
+/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#define tcp_master orig_tcp_master
+#include "knot/server/tcp-handler.c"
+#undef tcp_master
+
+int tcp_master(dthread_t *thread)
+{
+ log_info("AFL, empty TCP handler");
+ return 0;
+}
diff --git a/tests-fuzz/knotd_wrap/udp-handler.c b/tests-fuzz/knotd_wrap/udp-handler.c
new file mode 100644
index 0000000..e70616d
--- /dev/null
+++ b/tests-fuzz/knotd_wrap/udp-handler.c
@@ -0,0 +1,117 @@
+/* Copyright (C) 2023 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <signal.h>
+
+#include "knot/server/udp-handler.c"
+#include "knot/common/log.h"
+
+typedef struct {
+ struct iovec iov[NBUFS];
+ uint8_t buf[NBUFS][KNOT_WIRE_MAX_PKTSIZE];
+ sockaddr_t addr;
+ bool afl_persistent;
+} udp_stdin_t;
+
+static inline void next(udp_stdin_t *rq)
+{
+ if (rq->afl_persistent) {
+ raise(SIGSTOP);
+ } else {
+ exit(0);
+ }
+}
+
+static void *udp_stdin_init(_unused_ udp_context_t *ctx, _unused_ void *xdp_sock)
+{
+ udp_stdin_t *rq = calloc(1, sizeof(*rq));
+ if (rq == NULL) {
+ return NULL;
+ }
+
+ for (unsigned i = 0; i < NBUFS; ++i) {
+ rq->iov[i].iov_base = rq->buf[i];
+ rq->iov[i].iov_len = sizeof(rq->buf[i]);
+ }
+
+ rq->addr.ip4.sin_family = AF_INET;
+ rq->addr.ip4.sin_addr.s_addr = IN_LOOPBACKNET;
+ rq->addr.ip4.sin_port = 42;
+
+ rq->afl_persistent = getenv("AFL_PERSISTENT") != NULL;
+
+ return rq;
+}
+
+static void udp_stdin_deinit(void *d)
+{
+ free(d);
+}
+
+static int udp_stdin_recv(_unused_ int fd, void *d)
+{
+ udp_stdin_t *rq = (udp_stdin_t *)d;
+ rq->iov[RX].iov_len = fread(rq->iov[RX].iov_base, 1,
+ sizeof(rq->buf[RX]), stdin);
+ if (rq->iov[RX].iov_len == 0) {
+ next(rq);
+ }
+
+ return rq->iov[RX].iov_len;
+}
+
+static void udp_stdin_handle(udp_context_t *ctx, _unused_ const iface_t *iface, void *d)
+{
+ udp_stdin_t *rq = (udp_stdin_t *)d;
+ knotd_qdata_params_t params = params_init(KNOTD_QUERY_PROTO_UDP, &rq->addr,
+ &iface->addr, STDIN_FILENO, NULL, 0);
+ udp_handler(ctx, &params, &rq->iov[RX], &rq->iov[TX]);
+}
+
+static void udp_stdin_send(void *d)
+{
+ udp_stdin_t *rq = (udp_stdin_t *)d;
+ next(rq);
+}
+
+static udp_api_t stdin_api = {
+ udp_stdin_init,
+ udp_stdin_deinit,
+ udp_stdin_recv,
+ udp_stdin_handle,
+ udp_stdin_send
+};
+
+void udp_master_init_stdio(server_t *server) {
+
+ log_info("AFL, UDP handler listening on stdin");
+
+ // Register dummy interface to server.
+ iface_t *ifc = calloc(1, sizeof(*ifc));
+ assert(ifc);
+ ifc->fd_udp = calloc(1, sizeof(*ifc->fd_udp));
+ assert(ifc->fd_udp);
+ ifc->fd_udp[0] = STDIN_FILENO;
+ ifc->fd_udp_count = 1;
+
+ server->n_ifaces = 1;
+ server->ifaces = ifc;
+
+ udp_msg_api = stdin_api;
+#ifdef ENABLE_RECVMMSG
+ udp_mmsg_api = stdin_api;
+#endif
+}
diff --git a/tests-fuzz/main.c b/tests-fuzz/main.c
new file mode 100644
index 0000000..e8eb428
--- /dev/null
+++ b/tests-fuzz/main.c
@@ -0,0 +1,140 @@
+/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+ * Copyright (C) 2017 Tim Ruehsen
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
+
+#ifndef __AFL_LOOP
+
+#include <dirent.h>
+
+static void test_all_from(const char *dirname)
+{
+ DIR *dirp = opendir(dirname);
+ if (dirp == NULL) {
+ return;
+ }
+
+ struct dirent *dp;
+ while ((dp = readdir(dirp))) {
+ if (*dp->d_name == '.') {
+ continue;
+ }
+
+ char fname[strlen(dirname) + strlen(dp->d_name) + 2];
+ int ret = snprintf(fname, sizeof(fname), "%s/%s", dirname, dp->d_name);
+ if (ret < 0 || ret >= sizeof(fname)) {
+ fprintf(stderr, "Invalid path %s/%s\n", dirname, dp->d_name);
+ }
+
+ int fd;
+ if ((fd = open(fname, O_RDONLY)) == -1) {
+ fprintf(stderr, "Failed to open %s (%d)\n", fname, errno);
+ continue;
+ }
+
+ struct stat st;
+ if (fstat(fd, &st) != 0) {
+ fprintf(stderr, "Failed to stat %d (%d)\n", fd, errno);
+ close(fd);
+ continue;
+ }
+
+ uint8_t *data = malloc(st.st_size);
+ if (data == NULL) {
+ fprintf(stderr, "Failed to stat %d (%d)\n", fd, ENOMEM);
+ close(fd);
+ continue;
+ }
+
+ ssize_t n;
+ if ((n = read(fd, data, st.st_size)) == st.st_size) {
+ printf("testing %llu bytes from '%s'\n", (unsigned long long) st.st_size, fname);
+ fflush(stdout);
+ LLVMFuzzerTestOneInput(data, st.st_size);
+ fflush(stderr);
+ } else {
+ fprintf(stderr, "Failed to read %llu bytes from %s (%d), got %zd\n",
+ (unsigned long long) st.st_size, fname, errno, n);
+ }
+
+ free(data);
+ close(fd);
+ }
+ closedir(dirp);
+}
+
+int main(int argc, char **argv)
+{
+ const char *target = strrchr(argv[0], '/');
+ target = target ? target + 1 : argv[0];
+
+ char corporadir[sizeof(SRCDIR) + 1 + strlen(target) + 8];
+
+ if (strncmp(target, "lt-", 3) == 0) {
+ target += 3;
+ }
+
+ int ret = snprintf(corporadir, sizeof(corporadir), SRCDIR "/%s.in", target);
+ if (ret < 0 || ret >= sizeof(corporadir)) {
+ fprintf(stderr, "Invalid path %s/%s\n", SRCDIR "/%s.in", target);
+ }
+
+ test_all_from(corporadir);
+
+ ret = snprintf(corporadir, sizeof(corporadir), SRCDIR "/%s.repro", target);
+ if (ret < 0 || ret >= sizeof(corporadir)) {
+ fprintf(stderr, "Invalid path %s/%s\n", SRCDIR "/%s.repro", target);
+ }
+
+ test_all_from(corporadir);
+
+ return 0;
+}
+
+#else
+
+int main(int argc, char **argv)
+{
+ unsigned char buf[64 * 1024];
+
+ while (__AFL_LOOP(10000)) {
+ int ret = fread(buf, 1, sizeof(buf), stdin);
+ if (ret < 0) {
+ return 0;
+ }
+
+ LLVMFuzzerTestOneInput(buf, ret);
+ }
+
+ return 0;
+}
+
+#endif /* __AFL_LOOP */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 19:32:21 +0000