Adding upstream version 1:2.3.19.1+dfsg1.upstream/1%2.3.19.1+dfsg1upstream

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

12 files changed, 1868 insertions, 0 deletions

diff --git a/src/anvil/Makefile.am b/src/anvil/Makefile.am
new file mode 100644
index 0000000..1af526f
--- /dev/null
+++ b/src/anvil/Makefile.am
@@ -0,0 +1,48 @@
+pkglibexecdir = $(libexecdir)/dovecot
+
+pkglibexec_PROGRAMS = anvil
+
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+	-I$(top_srcdir)/src/lib \
+	-I$(top_srcdir)/src/lib-test \
+	-I$(top_srcdir)/src/lib-settings \
+	-I$(top_srcdir)/src/lib-master \
+	$(BINARY_CFLAGS)
+
+anvil_LDADD = \
+	$(LIBDOVECOT) \
+	$(RAND_LIBS) \
+	$(BINARY_LDFLAGS)
+
+anvil_DEPENDENCIES = $(LIBDOVECOT_DEPS)
+
+anvil_SOURCES = \
+	main.c \
+	anvil-connection.c \
+	anvil-settings.c \
+	connect-limit.c \
+	penalty.c
+
+noinst_HEADERS = \
+	anvil-connection.h \
+	common.h \
+	connect-limit.h \
+	penalty.h
+
+test_programs = \
+	test-penalty
+
+noinst_PROGRAMS = $(test_programs)
+
+test_libs = \
+	../lib-test/libtest.la \
+	../lib/liblib.la
+
+test_penalty_SOURCES = test-penalty.c
+test_penalty_LDADD = penalty.o $(test_libs)
+test_penalty_DEPENDENCIES = $(pkglibexec_PROGRAMS) $(test_libs)
+
+check-local:
+	for bin in $(test_programs); do \
+	  if ! $(RUN_TEST) ./$$bin; then exit 1; fi; \
+	done
diff --git a/src/anvil/Makefile.in b/src/anvil/Makefile.in
new file mode 100644
index 0000000..778dff2
--- /dev/null
+++ b/src/anvil/Makefile.in
@@ -0,0 +1,867 @@
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+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+AM_CPPFLAGS = \
+	-I$(top_srcdir)/src/lib \
+	-I$(top_srcdir)/src/lib-test \
+	-I$(top_srcdir)/src/lib-settings \
+	-I$(top_srcdir)/src/lib-master \
+	$(BINARY_CFLAGS)
+
+anvil_LDADD = \
+	$(LIBDOVECOT) \
+	$(RAND_LIBS) \
+	$(BINARY_LDFLAGS)
+
+anvil_DEPENDENCIES = $(LIBDOVECOT_DEPS)
+anvil_SOURCES = \
+	main.c \
+	anvil-connection.c \
+	anvil-settings.c \
+	connect-limit.c \
+	penalty.c
+
+noinst_HEADERS = \
+	anvil-connection.h \
+	common.h \
+	connect-limit.h \
+	penalty.h
+
+test_programs = \
+	test-penalty
+
+test_libs = \
+	../lib-test/libtest.la \
+	../lib/liblib.la
+
+test_penalty_SOURCES = test-penalty.c
+test_penalty_LDADD = penalty.o $(test_libs)
+test_penalty_DEPENDENCIES = $(pkglibexec_PROGRAMS) $(test_libs)
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .lo .o .obj
+$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$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 src/anvil/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --foreign src/anvil/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: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
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+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
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+	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
+install-pkglibexecPROGRAMS: $(pkglibexec_PROGRAMS)
+	@$(NORMAL_INSTALL)
+	@list='$(pkglibexec_PROGRAMS)'; test -n "$(pkglibexecdir)" || list=; \
+	if test -n "$$list"; then \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(pkglibexecdir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(pkglibexecdir)" || exit 1; \
+	fi; \
+	for p in $$list; do echo "$$p $$p"; done | \
+	sed 's/$(EXEEXT)$$//' | \
+	while read p p1; do if test -f $$p \
+	 || test -f $$p1 \
+	  ; then echo "$$p"; echo "$$p"; else :; fi; \
+	done | \
+	sed -e 'p;s,.*/,,;n;h' \
+	    -e 's|.*|.|' \
+	    -e 'p;x;s,.*/,,;s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/' | \
+	sed 'N;N;N;s,\n, ,g' | \
+	$(AWK) 'BEGIN { files["."] = ""; dirs["."] = 1 } \
+	  { d=$$3; if (dirs[d] != 1) { print "d", d; dirs[d] = 1 } \
+	    if ($$2 == $$4) files[d] = files[d] " " $$1; \
+	    else { print "f", $$3 "/" $$4, $$1; } } \
+	  END { for (d in files) print "f", d, files[d] }' | \
+	while read type dir files; do \
+	    if test "$$dir" = .; then dir=; else dir=/$$dir; fi; \
+	    test -z "$$files" || { \
+	    echo " $(INSTALL_PROGRAM_ENV) $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $$files '$(DESTDIR)$(pkglibexecdir)$$dir'"; \
+	    $(INSTALL_PROGRAM_ENV) $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $$files "$(DESTDIR)$(pkglibexecdir)$$dir" || exit $$?; \
+	    } \
+	; done
+
+uninstall-pkglibexecPROGRAMS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(pkglibexec_PROGRAMS)'; test -n "$(pkglibexecdir)" || list=; \
+	files=`for p in $$list; do echo "$$p"; done | \
+	  sed -e 'h;s,^.*/,,;s/$(EXEEXT)$$//;$(transform)' \
+	      -e 's/$$/$(EXEEXT)/' \
+	`; \
+	test -n "$$list" || exit 0; \
+	echo " ( cd '$(DESTDIR)$(pkglibexecdir)' && rm -f" $$files ")"; \
+	cd "$(DESTDIR)$(pkglibexecdir)" && rm -f $$files
+
+clean-pkglibexecPROGRAMS:
+	@list='$(pkglibexec_PROGRAMS)'; test -n "$$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
+
+anvil$(EXEEXT): $(anvil_OBJECTS) $(anvil_DEPENDENCIES) $(EXTRA_anvil_DEPENDENCIES) 
+	@rm -f anvil$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(anvil_OBJECTS) $(anvil_LDADD) $(LIBS)
+
+test-penalty$(EXEEXT): $(test_penalty_OBJECTS) $(test_penalty_DEPENDENCIES) $(EXTRA_test_penalty_DEPENDENCIES) 
+	@rm -f test-penalty$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_penalty_OBJECTS) $(test_penalty_LDADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/anvil-connection.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/anvil-settings.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/connect-limit.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/main.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/penalty.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/test-penalty.Po@am__quote@ # am--include-marker
+
+$(am__depfiles_remade):
+	@$(MKDIR_P) $(@D)
+	@echo '# dummy' >$@-t && $(am__mv) $@-t $@
+
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+
+.c.o:
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+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
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+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
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+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
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+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
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+
+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
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+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$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)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
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+	$(MAKE) $(AM_MAKEFLAGS) check-local
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+installdirs:
+	for dir in "$(DESTDIR)$(pkglibexecdir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
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+	  $(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:
+
+clean-generic:
+
+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)
+
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+	-rm -f ./$(DEPDIR)/anvil-settings.Po
+	-rm -f ./$(DEPDIR)/connect-limit.Po
+	-rm -f ./$(DEPDIR)/main.Po
+	-rm -f ./$(DEPDIR)/penalty.Po
+	-rm -f ./$(DEPDIR)/test-penalty.Po
+	-rm -f Makefile
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+	-rm -f ./$(DEPDIR)/connect-limit.Po
+	-rm -f ./$(DEPDIR)/main.Po
+	-rm -f ./$(DEPDIR)/penalty.Po
+	-rm -f ./$(DEPDIR)/test-penalty.Po
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+	check-local clean clean-generic clean-libtool \
+	clean-noinstPROGRAMS clean-pkglibexecPROGRAMS cscopelist-am \
+	ctags ctags-am distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir 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-man install-pdf install-pdf-am \
+	install-pkglibexecPROGRAMS install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
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+	mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
+	pdf pdf-am ps ps-am tags tags-am uninstall uninstall-am \
+	uninstall-pkglibexecPROGRAMS
+
+.PRECIOUS: Makefile
+
+
+check-local:
+	for bin in $(test_programs); do \
+	  if ! $(RUN_TEST) ./$$bin; then exit 1; fi; \
+	done
+
+# 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/src/anvil/anvil-connection.c b/src/anvil/anvil-connection.c
new file mode 100644
index 0000000..20e859b
--- /dev/null
+++ b/src/anvil/anvil-connection.c
@@ -0,0 +1,226 @@
+/* Copyright (c) 2009-2018 Dovecot authors, see the included COPYING file */
+
+#include "common.h"
+#include "llist.h"
+#include "istream.h"
+#include "ostream.h"
+#include "strescape.h"
+#include "master-service.h"
+#include "master-interface.h"
+#include "connect-limit.h"
+#include "penalty.h"
+#include "anvil-connection.h"
+
+#include <unistd.h>
+
+#define MAX_INBUF_SIZE 1024
+
+#define ANVIL_CLIENT_PROTOCOL_MAJOR_VERSION 1
+#define ANVIL_CLIENT_PROTOCOL_MINOR_VERSION 0
+
+struct anvil_connection {
+	struct anvil_connection *prev, *next;
+
+	int fd;
+	struct istream *input;
+	struct ostream *output;
+	struct io *io;
+
+	bool version_received:1;
+	bool handshaked:1;
+	bool master:1;
+	bool fifo:1;
+};
+
+static struct anvil_connection *anvil_connections = NULL;
+
+static const char *const *
+anvil_connection_next_line(struct anvil_connection *conn)
+{
+	const char *line;
+
+	line = i_stream_next_line(conn->input);
+	return line == NULL ? NULL : t_strsplit_tabescaped(line);
+}
+
+static int
+anvil_connection_request(struct anvil_connection *conn,
+			 const char *const *args, const char **error_r)
+{
+	const char *cmd = args[0];
+	unsigned int value, checksum;
+	time_t stamp;
+	pid_t pid;
+
+	args++;
+	if (strcmp(cmd, "CONNECT") == 0) {
+		if (args[0] == NULL || args[1] == NULL) {
+			*error_r = "CONNECT: Not enough parameters";
+			return -1;
+		}
+		if (str_to_pid(args[0], &pid) < 0) {
+			*error_r = "CONNECT: Invalid pid";
+			return -1;
+		}
+		connect_limit_connect(connect_limit, pid, args[1]);
+	} else if (strcmp(cmd, "DISCONNECT") == 0) {
+		if (args[0] == NULL || args[1] == NULL) {
+			*error_r = "DISCONNECT: Not enough parameters";
+			return -1;
+		}
+		if (str_to_pid(args[0], &pid) < 0) {
+			*error_r = "DISCONNECT: Invalid pid";
+			return -1;
+		}
+		connect_limit_disconnect(connect_limit, pid, args[1]);
+	} else if (strcmp(cmd, "CONNECT-DUMP") == 0) {
+		connect_limit_dump(connect_limit, conn->output);
+	} else if (strcmp(cmd, "KILL") == 0) {
+		if (args[0] == NULL) {
+			*error_r = "KILL: Not enough parameters";
+			return -1;
+		}
+		if (!conn->master) {
+			*error_r = "KILL sent by a non-master connection";
+			return -1;
+		}
+		if (str_to_pid(args[0], &pid) < 0) {
+			*error_r = "KILL: Invalid pid";
+			return -1;
+		}
+		connect_limit_disconnect_pid(connect_limit, pid);
+	} else if (strcmp(cmd, "LOOKUP") == 0) {
+		if (args[0] == NULL) {
+			*error_r = "LOOKUP: Not enough parameters";
+			return -1;
+		}
+		if (conn->output == NULL) {
+			*error_r = "LOOKUP on a FIFO, can't send reply";
+			return -1;
+		}
+		value = connect_limit_lookup(connect_limit, args[0]);
+		o_stream_nsend_str(conn->output,
+				   t_strdup_printf("%u\n", value));
+	} else if (strcmp(cmd, "PENALTY-GET") == 0) {
+		if (args[0] == NULL) {
+			*error_r = "PENALTY-GET: Not enough parameters";
+			return -1;
+		}
+		value = penalty_get(penalty, args[0], &stamp);
+		o_stream_nsend_str(conn->output,
+			t_strdup_printf("%u %s\n", value, dec2str(stamp)));
+	} else if (strcmp(cmd, "PENALTY-INC") == 0) {
+		if (args[0] == NULL || args[1] == NULL || args[2] == NULL) {
+			*error_r = "PENALTY-INC: Not enough parameters";
+			return -1;
+		}
+		if (str_to_uint(args[1], &checksum) < 0 ||
+		    str_to_uint(args[2], &value) < 0 ||
+		    value > PENALTY_MAX_VALUE ||
+		    (value == 0 && checksum != 0)) {
+			*error_r = "PENALTY-INC: Invalid parameters";
+			return -1;
+		}
+		penalty_inc(penalty, args[0], checksum, value);
+	} else if (strcmp(cmd, "PENALTY-SET-EXPIRE-SECS") == 0) {
+		if (args[0] == NULL || str_to_uint(args[0], &value) < 0) {
+			*error_r = "PENALTY-SET-EXPIRE-SECS: "
+				"Invalid parameters";
+			return -1;
+		}
+		penalty_set_expire_secs(penalty, value);
+	} else if (strcmp(cmd, "PENALTY-DUMP") == 0) {
+		penalty_dump(penalty, conn->output);
+	} else {
+		*error_r = t_strconcat("Unknown command: ", cmd, NULL);
+		return -1;
+	}
+	return 0;
+}
+
+static void anvil_connection_input(struct anvil_connection *conn)
+{
+	const char *line, *const *args, *error;
+
+	switch (i_stream_read(conn->input)) {
+	case -2:
+		i_error("BUG: Anvil client connection sent too much data");
+		anvil_connection_destroy(conn);
+		return;
+	case -1:
+		anvil_connection_destroy(conn);
+		return;
+	}
+
+	if (!conn->version_received) {
+		if ((line = i_stream_next_line(conn->input)) == NULL)
+			return;
+
+		if (!version_string_verify(line, "anvil",
+				ANVIL_CLIENT_PROTOCOL_MAJOR_VERSION)) {
+			if (anvil_restarted && (conn->master || conn->fifo)) {
+				/* old pending data. ignore input until we get
+				   the handshake. */
+				anvil_connection_input(conn);
+				return;
+			}
+			i_error("Anvil client not compatible with this server "
+				"(mixed old and new binaries?) %s", line);
+			anvil_connection_destroy(conn);
+			return;
+		}
+		conn->version_received = TRUE;
+	}
+
+	while ((args = anvil_connection_next_line(conn)) != NULL) {
+		if (args[0] != NULL) {
+			if (anvil_connection_request(conn, args, &error) < 0) {
+				i_error("Anvil client input error: %s", error);
+				anvil_connection_destroy(conn);
+				break;
+			}
+		}
+	}
+}
+
+struct anvil_connection *
+anvil_connection_create(int fd, bool master, bool fifo)
+{
+	struct anvil_connection *conn;
+
+	conn = i_new(struct anvil_connection, 1);
+	conn->fd = fd;
+	conn->input = i_stream_create_fd(fd, MAX_INBUF_SIZE);
+	if (!fifo) {
+		conn->output = o_stream_create_fd(fd, SIZE_MAX);
+		o_stream_set_no_error_handling(conn->output, TRUE);
+	}
+	conn->io = io_add(fd, IO_READ, anvil_connection_input, conn);
+	conn->master = master;
+	conn->fifo = fifo;
+	DLLIST_PREPEND(&anvil_connections, conn);
+	return conn;
+}
+
+void anvil_connection_destroy(struct anvil_connection *conn)
+{
+	bool fifo = conn->fifo;
+
+	DLLIST_REMOVE(&anvil_connections, conn);
+
+	io_remove(&conn->io);
+	i_stream_destroy(&conn->input);
+	o_stream_destroy(&conn->output);
+	if (close(conn->fd) < 0)
+		i_error("close(anvil conn) failed: %m");
+	i_free(conn);
+
+	if (!fifo)
+		master_service_client_connection_destroyed(master_service);
+}
+
+void anvil_connections_destroy_all(void)
+{
+	while (anvil_connections != NULL)
+		anvil_connection_destroy(anvil_connections);
+}
diff --git a/src/anvil/anvil-connection.h b/src/anvil/anvil-connection.h
new file mode 100644
index 0000000..f94fbab
--- /dev/null
+++ b/src/anvil/anvil-connection.h
@@ -0,0 +1,10 @@
+#ifndef ANVIL_CONNECTION_H
+#define ANVIL_CONNECTION_H
+
+struct anvil_connection *
+anvil_connection_create(int fd, bool master, bool fifo);
+void anvil_connection_destroy(struct anvil_connection *conn);
+
+void anvil_connections_destroy_all(void);
+
+#endif
diff --git a/src/anvil/anvil-settings.c b/src/anvil/anvil-settings.c
new file mode 100644
index 0000000..a94823e
--- /dev/null
+++ b/src/anvil/anvil-settings.c
@@ -0,0 +1,50 @@
+/* Copyright (c) 2009-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "buffer.h"
+#include "settings-parser.h"
+#include "service-settings.h"
+
+#include <stddef.h>
+
+/* <settings checks> */
+static struct file_listener_settings anvil_unix_listeners_array[] = {
+	{ "anvil", 0600, "", "" },
+	{ "anvil-auth-penalty", 0600, "", "" }
+};
+static struct file_listener_settings *anvil_unix_listeners[] = {
+	&anvil_unix_listeners_array[0],
+	&anvil_unix_listeners_array[1]
+};
+static buffer_t anvil_unix_listeners_buf = {
+	{ { anvil_unix_listeners, sizeof(anvil_unix_listeners) } }
+};
+/* </settings checks> */
+
+struct service_settings anvil_service_settings = {
+	.name = "anvil",
+	.protocol = "",
+	.type = "anvil",
+	.executable = "anvil",
+	.user = "$default_internal_user",
+	.group = "",
+	.privileged_group = "",
+	.extra_groups = "",
+	.chroot = "empty",
+
+	.drop_priv_before_exec = FALSE,
+
+	.process_min_avail = 1,
+	.process_limit = 1,
+	.client_limit = 0,
+	.service_count = 0,
+	.idle_kill = UINT_MAX,
+	.vsz_limit = UOFF_T_MAX,
+
+	.unix_listeners = { { &anvil_unix_listeners_buf,
+			      sizeof(anvil_unix_listeners[0]) } },
+	.fifo_listeners = ARRAY_INIT,
+	.inet_listeners = ARRAY_INIT,
+
+	.process_limit_1 = TRUE
+};
diff --git a/src/anvil/common.h b/src/anvil/common.h
new file mode 100644
index 0000000..f9a44bd
--- /dev/null
+++ b/src/anvil/common.h
@@ -0,0 +1,10 @@
+#ifndef COMMON_H
+#define COMMON_H
+
+#include "lib.h"
+
+extern struct connect_limit *connect_limit;
+extern struct penalty *penalty;
+extern bool anvil_restarted;
+
+#endif
diff --git a/src/anvil/connect-limit.c b/src/anvil/connect-limit.c
new file mode 100644
index 0000000..0d27368
--- /dev/null
+++ b/src/anvil/connect-limit.c
@@ -0,0 +1,192 @@
+/* Copyright (c) 2009-2018 Dovecot authors, see the included COPYING file */
+
+#include "common.h"
+#include "hash.h"
+#include "str.h"
+#include "strescape.h"
+#include "ostream.h"
+#include "connect-limit.h"
+
+struct ident_pid {
+	/* ident string points to ident_hash keys */
+	const char *ident;
+	pid_t pid;
+	unsigned int refcount;
+};
+
+struct connect_limit {
+	/* ident => unsigned int refcount */
+	HASH_TABLE(char *, void *) ident_hash;
+	/* struct ident_pid => struct ident_pid */
+	HASH_TABLE(struct ident_pid *, struct ident_pid *) ident_pid_hash;
+};
+
+static void
+connect_limit_ident_hash_unref(struct connect_limit *limit, const char *ident);
+
+static unsigned int ident_pid_hash(const struct ident_pid *i)
+{
+	return str_hash(i->ident) ^ i->pid;
+}
+
+static int ident_pid_cmp(const struct ident_pid *i1, const struct ident_pid *i2)
+{
+	if (i1->pid < i2->pid)
+		return -1;
+	else if (i1->pid > i2->pid)
+		return 1;
+	else
+		return strcmp(i1->ident, i2->ident);
+}
+
+struct connect_limit *connect_limit_init(void)
+{
+	struct connect_limit *limit;
+
+	limit = i_new(struct connect_limit, 1);
+	hash_table_create(&limit->ident_hash, default_pool, 0, str_hash, strcmp);
+	hash_table_create(&limit->ident_pid_hash, default_pool, 0,
+			  ident_pid_hash, ident_pid_cmp);
+	return limit;
+}
+
+void connect_limit_deinit(struct connect_limit **_limit)
+{
+	struct connect_limit *limit = *_limit;
+	struct hash_iterate_context *iter;
+	struct ident_pid *i, *value;
+
+	iter = hash_table_iterate_init(limit->ident_pid_hash);
+	while (hash_table_iterate(iter, limit->ident_pid_hash, &i, &value)) {
+		hash_table_remove(limit->ident_pid_hash, i);
+		for (; i->refcount > 0; i->refcount--)
+			connect_limit_ident_hash_unref(limit, i->ident);
+		i_free(i);
+	}
+	hash_table_iterate_deinit(&iter);
+
+	*_limit = NULL;
+	hash_table_destroy(&limit->ident_hash);
+	hash_table_destroy(&limit->ident_pid_hash);
+	i_free(limit);
+}
+
+unsigned int connect_limit_lookup(struct connect_limit *limit,
+				  const char *ident)
+{
+	void *value;
+
+	value = hash_table_lookup(limit->ident_hash, ident);
+	return POINTER_CAST_TO(value, unsigned int);
+}
+
+void connect_limit_connect(struct connect_limit *limit, pid_t pid,
+			   const char *ident)
+{
+	struct ident_pid *i, lookup_i;
+	char *key;
+	void *value;
+
+	if (!hash_table_lookup_full(limit->ident_hash, ident,
+				    &key, &value)) {
+		key = i_strdup(ident);
+		value = POINTER_CAST(1);
+		hash_table_insert(limit->ident_hash, key, value);
+	} else {
+		value = POINTER_CAST(POINTER_CAST_TO(value, unsigned int) + 1);
+		hash_table_update(limit->ident_hash, key, value);
+	}
+
+	lookup_i.ident = ident;
+	lookup_i.pid = pid;
+	i = hash_table_lookup(limit->ident_pid_hash, &lookup_i);
+	if (i == NULL) {
+		i = i_new(struct ident_pid, 1);
+		i->ident = key;
+		i->pid = pid;
+		i->refcount = 1;
+		hash_table_insert(limit->ident_pid_hash, i, i);
+	} else {
+		i->refcount++;
+	}
+}
+
+static void
+connect_limit_ident_hash_unref(struct connect_limit *limit, const char *ident)
+{
+	char *key;
+	void *value;
+	unsigned int new_refcount;
+
+	if (!hash_table_lookup_full(limit->ident_hash, ident, &key, &value))
+		i_panic("connect limit hash tables are inconsistent");
+
+	new_refcount = POINTER_CAST_TO(value, unsigned int) - 1;
+	if (new_refcount > 0) {
+		value = POINTER_CAST(new_refcount);
+		hash_table_update(limit->ident_hash, key, value);
+	} else {
+		hash_table_remove(limit->ident_hash, key);
+		i_free(key);
+	}
+}
+
+void connect_limit_disconnect(struct connect_limit *limit, pid_t pid,
+			      const char *ident)
+{
+	struct ident_pid *i, lookup_i;
+
+	lookup_i.ident = ident;
+	lookup_i.pid = pid;
+
+	i = hash_table_lookup(limit->ident_pid_hash, &lookup_i);
+	if (i == NULL) {
+		i_error("connect limit: disconnection for unknown "
+			"pid %s + ident %s", dec2str(pid), ident);
+		return;
+	}
+
+	if (--i->refcount == 0) {
+		hash_table_remove(limit->ident_pid_hash, i);
+		i_free(i);
+	}
+
+	connect_limit_ident_hash_unref(limit, ident);
+}
+
+void connect_limit_disconnect_pid(struct connect_limit *limit, pid_t pid)
+{
+	struct hash_iterate_context *iter;
+	struct ident_pid *i, *value;
+
+	/* this should happen rarely (or never), so this slow implementation
+	   should be fine. */
+	iter = hash_table_iterate_init(limit->ident_pid_hash);
+	while (hash_table_iterate(iter, limit->ident_pid_hash, &i, &value)) {
+		if (i->pid == pid) {
+			hash_table_remove(limit->ident_pid_hash, i);
+			for (; i->refcount > 0; i->refcount--)
+				connect_limit_ident_hash_unref(limit, i->ident);
+			i_free(i);
+		}
+	}
+	hash_table_iterate_deinit(&iter);
+}
+
+void connect_limit_dump(struct connect_limit *limit, struct ostream *output)
+{
+	struct hash_iterate_context *iter;
+	struct ident_pid *i, *value;
+	string_t *str = t_str_new(256);
+
+	iter = hash_table_iterate_init(limit->ident_pid_hash);
+	while (hash_table_iterate(iter, limit->ident_pid_hash, &i, &value)) {
+		str_truncate(str, 0);
+		str_append_tabescaped(str, i->ident);
+		str_printfa(str, "\t%ld\t%u\n", (long)i->pid, i->refcount);
+		if (o_stream_send(output, str_data(str), str_len(str)) < 0)
+			break;
+	}
+	hash_table_iterate_deinit(&iter);
+	o_stream_nsend(output, "\n", 1);
+}
diff --git a/src/anvil/connect-limit.h b/src/anvil/connect-limit.h
new file mode 100644
index 0000000..2d3c611
--- /dev/null
+++ b/src/anvil/connect-limit.h
@@ -0,0 +1,16 @@
+#ifndef CONNECT_LIMIT_H
+#define CONNECT_LIMIT_H
+
+struct connect_limit *connect_limit_init(void);
+void connect_limit_deinit(struct connect_limit **limit);
+
+unsigned int connect_limit_lookup(struct connect_limit *limit,
+				  const char *ident);
+void connect_limit_connect(struct connect_limit *limit, pid_t pid,
+			   const char *ident);
+void connect_limit_disconnect(struct connect_limit *limit, pid_t pid,
+			      const char *ident);
+void connect_limit_disconnect_pid(struct connect_limit *limit, pid_t pid);
+void connect_limit_dump(struct connect_limit *limit, struct ostream *output);
+
+#endif
diff --git a/src/anvil/main.c b/src/anvil/main.c
new file mode 100644
index 0000000..7e4050b
--- /dev/null
+++ b/src/anvil/main.c
@@ -0,0 +1,90 @@
+/* Copyright (c) 2009-2018 Dovecot authors, see the included COPYING file */
+
+#include "common.h"
+#include "array.h"
+#include "env-util.h"
+#include "fdpass.h"
+#include "ioloop.h"
+#include "restrict-access.h"
+#include "master-service.h"
+#include "master-service-settings.h"
+#include "master-interface.h"
+#include "connect-limit.h"
+#include "penalty.h"
+#include "anvil-connection.h"
+
+#include <unistd.h>
+
+struct connect_limit *connect_limit;
+struct penalty *penalty;
+bool anvil_restarted;
+static struct io *log_fdpass_io;
+
+static void client_connected(struct master_service_connection *conn)
+{
+	bool master = conn->listen_fd == MASTER_LISTEN_FD_FIRST;
+
+	master_service_client_connection_accept(conn);
+	(void)anvil_connection_create(conn->fd, master, conn->fifo);
+}
+
+static void ATTR_NULL(1)
+log_fdpass_input(void *context ATTR_UNUSED)
+{
+	int fd;
+	char c;
+	ssize_t ret;
+
+	/* master wants us to replace the log fd */
+	ret = fd_read(MASTER_ANVIL_LOG_FDPASS_FD, &c, 1, &fd);
+	if (ret < 0)
+		i_error("fd_read(log fd) failed: %m");
+	else if (ret == 0) {
+		/* master died. lib-master should notice it soon. */
+		io_remove(&log_fdpass_io);
+	} else {
+		if (dup2(fd, STDERR_FILENO) < 0)
+			i_fatal("dup2(fd_read  log fd, stderr) failed: %m");
+		if (close(fd) < 0)
+			i_error("close(fd_read log fd) failed: %m");
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	const enum master_service_flags service_flags =
+		MASTER_SERVICE_FLAG_DONT_SEND_STATS |
+		MASTER_SERVICE_FLAG_UPDATE_PROCTITLE;
+	const char *error;
+
+	master_service = master_service_init("anvil", service_flags,
+					     &argc, &argv, "");
+	if (master_getopt(master_service) > 0)
+		return FATAL_DEFAULT;
+	if (master_service_settings_read_simple(master_service,
+						NULL, &error) < 0)
+		i_fatal("Error reading configuration: %s", error);
+	master_service_init_log(master_service);
+
+	restrict_access_by_env(RESTRICT_ACCESS_FLAG_ALLOW_ROOT, NULL);
+	restrict_access_allow_coredumps(TRUE);
+	anvil_restarted = getenv("ANVIL_RESTARTED") != NULL;
+
+	/* delay dying until all of our clients are gone */
+	master_service_set_die_with_master(master_service, FALSE);
+
+	connect_limit = connect_limit_init();
+	penalty = penalty_init();
+	log_fdpass_io = io_add(MASTER_ANVIL_LOG_FDPASS_FD, IO_READ,
+			       log_fdpass_input, NULL);
+	master_service_init_finish(master_service);
+
+	master_service_run(master_service, client_connected);
+
+	io_remove(&log_fdpass_io);
+	penalty_deinit(&penalty);
+	connect_limit_deinit(&connect_limit);
+	anvil_connections_destroy_all();
+	master_service_deinit(&master_service);
+        return 0;
+}
diff --git a/src/anvil/penalty.c b/src/anvil/penalty.c
new file mode 100644
index 0000000..2ab6da1
--- /dev/null
+++ b/src/anvil/penalty.c
@@ -0,0 +1,273 @@
+/* Copyright (c) 2009-2018 Dovecot authors, see the included COPYING file */
+
+/* The idea behind checksums is that the same username+password doesn't
+   increase the penalty, because it's most likely a user with a misconfigured
+   account. */
+
+#include "lib.h"
+#include "ioloop.h"
+#include "hash.h"
+#include "str.h"
+#include "strescape.h"
+#include "llist.h"
+#include "ostream.h"
+#include "penalty.h"
+
+#include <time.h>
+
+#define PENALTY_DEFAULT_EXPIRE_SECS (60*60)
+#define PENALTY_CHECKSUM_SAVE_COUNT
+#define CHECKSUM_VALUE_COUNT 2
+#define CHECKSUM_VALUE_PTR_COUNT 10
+
+#define LAST_UPDATE_BITS 15
+
+struct penalty_rec {
+	/* ordered by last_update */
+	struct penalty_rec *prev, *next;
+
+	char *ident;
+	unsigned int last_penalty;
+
+	unsigned int penalty:16;
+	unsigned int last_update:LAST_UPDATE_BITS; /* last_penalty + n */
+	bool checksum_is_pointer:1;
+	/* we use value up to two different checksums.
+	   after that switch to pointer. */
+	union {
+		unsigned int value[CHECKSUM_VALUE_COUNT];
+		unsigned int *value_ptr;
+	} checksum;
+};
+
+struct penalty {
+	/* ident => penalty_rec */
+	HASH_TABLE(char *, struct penalty_rec *) hash;
+	struct penalty_rec *oldest, *newest;
+
+	unsigned int expire_secs;
+	struct timeout *to;
+};
+
+struct penalty *penalty_init(void)
+{
+	struct penalty *penalty;
+
+	penalty = i_new(struct penalty, 1);
+	hash_table_create(&penalty->hash, default_pool, 0, str_hash, strcmp);
+	penalty->expire_secs = PENALTY_DEFAULT_EXPIRE_SECS;
+	return penalty;
+}
+
+static void penalty_rec_free(struct penalty *penalty, struct penalty_rec *rec)
+{
+	DLLIST2_REMOVE(&penalty->oldest, &penalty->newest, rec);
+	if (rec->checksum_is_pointer)
+		i_free(rec->checksum.value_ptr);
+	i_free(rec->ident);
+	i_free(rec);
+}
+
+void penalty_deinit(struct penalty **_penalty)
+{
+	struct penalty *penalty = *_penalty;
+
+	*_penalty = NULL;
+
+	while (penalty->oldest != NULL)
+		penalty_rec_free(penalty, penalty->oldest);
+	hash_table_destroy(&penalty->hash);
+
+	timeout_remove(&penalty->to);
+	i_free(penalty);
+}
+
+void penalty_set_expire_secs(struct penalty *penalty, unsigned int expire_secs)
+{
+	penalty->expire_secs = expire_secs;
+}
+
+static bool
+penalty_bump_checksum(struct penalty_rec *rec, unsigned int checksum)
+{
+	unsigned int *checksums;
+	unsigned int i, count;
+
+	if (!rec->checksum_is_pointer) {
+		checksums = rec->checksum.value;
+		count = CHECKSUM_VALUE_COUNT;
+	} else {
+		checksums = rec->checksum.value_ptr;
+		count = CHECKSUM_VALUE_PTR_COUNT;
+	}
+
+	for (i = 0; i < count; i++) {
+		if (checksums[i] == checksum) {
+			if (i > 0) {
+				memmove(checksums + 1, checksums,
+					sizeof(checksums[0]) * i);
+				checksums[0] = checksum;
+			}
+			return TRUE;
+		}
+	}
+	return FALSE;
+}
+
+static void penalty_add_checksum(struct penalty_rec *rec, unsigned int checksum)
+{
+	unsigned int *checksums;
+
+	i_assert(checksum != 0);
+
+	if (!rec->checksum_is_pointer) {
+		if (rec->checksum.value[CHECKSUM_VALUE_COUNT-1] == 0) {
+			memcpy(rec->checksum.value + 1, rec->checksum.value,
+			       sizeof(rec->checksum.value[0]) *
+			       (CHECKSUM_VALUE_COUNT-1));
+			rec->checksum.value[0] = checksum;
+			return;
+		}
+
+		/* switch to using a pointer */
+		checksums = i_new(unsigned int, CHECKSUM_VALUE_PTR_COUNT);
+		memcpy(checksums, rec->checksum.value,
+		       sizeof(checksums[0]) * CHECKSUM_VALUE_COUNT);
+		rec->checksum.value_ptr = checksums;
+		rec->checksum_is_pointer = TRUE;
+	}
+
+	memmove(rec->checksum.value_ptr + 1, rec->checksum.value_ptr,
+		sizeof(rec->checksum.value_ptr[0]) *
+		(CHECKSUM_VALUE_PTR_COUNT-1));
+	rec->checksum.value_ptr[0] = checksum;
+}
+
+unsigned int penalty_get(struct penalty *penalty, const char *ident,
+			 time_t *last_penalty_r)
+{
+	struct penalty_rec *rec;
+
+	rec = hash_table_lookup(penalty->hash, ident);
+	if (rec == NULL) {
+		*last_penalty_r = 0;
+		return 0;
+	}
+
+	*last_penalty_r = rec->last_penalty;
+	return rec->penalty;
+}
+
+static void penalty_timeout(struct penalty *penalty)
+{
+	struct penalty_rec *rec;
+	time_t rec_last_update, expire_time;
+	unsigned int diff;
+
+	timeout_remove(&penalty->to);
+
+	expire_time = ioloop_time - penalty->expire_secs;
+	while (penalty->oldest != NULL) {
+		rec = penalty->oldest;
+
+		rec_last_update = rec->last_penalty + rec->last_update;
+		if (rec_last_update > expire_time) {
+			diff = rec_last_update - expire_time;
+			penalty->to = timeout_add(diff * 1000,
+						  penalty_timeout, penalty);
+			break;
+		}
+		hash_table_remove(penalty->hash, rec->ident);
+		penalty_rec_free(penalty, rec);
+	}
+}
+
+void penalty_inc(struct penalty *penalty, const char *ident,
+		 unsigned int checksum, unsigned int value)
+{
+	struct penalty_rec *rec;
+	time_t diff;
+
+	i_assert(value > 0 || checksum == 0);
+	i_assert(value <= INT_MAX);
+
+	rec = hash_table_lookup(penalty->hash, ident);
+	if (rec == NULL) {
+		rec = i_new(struct penalty_rec, 1);
+		rec->ident = i_strdup(ident);
+		hash_table_insert(penalty->hash, rec->ident, rec);
+	} else {
+		DLLIST2_REMOVE(&penalty->oldest, &penalty->newest, rec);
+	}
+
+	if (checksum == 0) {
+		rec->penalty = value;
+		rec->last_penalty = ioloop_time;
+	} else {
+		if (penalty_bump_checksum(rec, checksum))
+			rec->penalty = value - 1;
+		else {
+			penalty_add_checksum(rec, checksum);
+			rec->penalty = value;
+			rec->last_penalty = ioloop_time;
+		}
+	}
+
+	diff = ioloop_time - rec->last_penalty;
+	if (diff >= (1 << LAST_UPDATE_BITS)) {
+		rec->last_update = (1 << LAST_UPDATE_BITS) - 1;
+		rec->last_penalty = ioloop_time - rec->last_update;
+	} else {
+		rec->last_update = diff;
+	}
+
+	DLLIST2_APPEND(&penalty->oldest, &penalty->newest, rec);
+
+	if (penalty->to == NULL) {
+		penalty->to = timeout_add(penalty->expire_secs * 1000,
+					  penalty_timeout, penalty);
+	}
+}
+
+bool penalty_has_checksum(struct penalty *penalty, const char *ident,
+			  unsigned int checksum)
+{
+	struct penalty_rec *rec;
+	const unsigned int *checksums;
+	unsigned int i, count;
+
+	rec = hash_table_lookup(penalty->hash, ident);
+	if (rec == NULL)
+		return FALSE;
+
+	if (!rec->checksum_is_pointer) {
+		checksums = rec->checksum.value;
+		count = CHECKSUM_VALUE_COUNT;
+	} else {
+		checksums = rec->checksum.value_ptr;
+		count = CHECKSUM_VALUE_PTR_COUNT;
+	}
+
+	for (i = 0; i < count; i++) {
+		if (checksums[i] == checksum)
+			return TRUE;
+	}
+	return FALSE;
+}
+
+void penalty_dump(struct penalty *penalty, struct ostream *output)
+{
+	const struct penalty_rec *rec;
+	string_t *str = t_str_new(256);
+
+	for (rec = penalty->oldest; rec != NULL; rec = rec->next) {
+		str_truncate(str, 0);
+		str_append_tabescaped(str, rec->ident);
+		str_printfa(str, "\t%u\t%u\t%u\n",
+			    rec->penalty, rec->last_penalty,
+			    rec->last_penalty + rec->last_update);
+		if (o_stream_send(output, str_data(str), str_len(str)) < 0)
+			break;
+	}
+	o_stream_nsend(output, "\n", 1);
+}
diff --git a/src/anvil/penalty.h b/src/anvil/penalty.h
new file mode 100644
index 0000000..23a182c
--- /dev/null
+++ b/src/anvil/penalty.h
@@ -0,0 +1,22 @@
+#ifndef PENALTY_H
+#define PENALTY_H
+
+#define PENALTY_MAX_VALUE ((1 << 16)-1)
+
+struct penalty *penalty_init(void);
+void penalty_deinit(struct penalty **penalty);
+
+void penalty_set_expire_secs(struct penalty *penalty, unsigned int expire_secs);
+
+unsigned int penalty_get(struct penalty *penalty, const char *ident,
+			 time_t *last_penalty_r);
+/* if checksum is non-zero and it already exists for ident, the value
+   is set to "value-1", otherwise it's set to "value". */
+void penalty_inc(struct penalty *penalty, const char *ident,
+		 unsigned int checksum, unsigned int value);
+
+bool penalty_has_checksum(struct penalty *penalty, const char *ident,
+			  unsigned int checksum);
+void penalty_dump(struct penalty *penalty, struct ostream *output);
+
+#endif
diff --git a/src/anvil/test-penalty.c b/src/anvil/test-penalty.c
new file mode 100644
index 0000000..438bf9e
--- /dev/null
+++ b/src/anvil/test-penalty.c
@@ -0,0 +1,64 @@
+/* Copyright (c) 2010-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "ioloop.h"
+#include "penalty.h"
+#include "test-common.h"
+
+static void test_penalty_checksum(void)
+{
+	struct penalty *penalty;
+	struct ioloop *ioloop;
+	time_t t;
+	unsigned int i, j;
+
+	test_begin("penalty");
+
+	ioloop = io_loop_create();
+	penalty = penalty_init();
+
+	test_assert(penalty_get(penalty, "foo", &t) == 0);
+	for (i = 1; i <= 10; i++) {
+		ioloop_time = 12345678 + i;
+		penalty_inc(penalty, "foo", i, 5+i);
+
+		for (j = I_MIN(1, i-1); j <= i; j++) {
+			test_assert(penalty_get(penalty, "foo", &t) == 5+i);
+			test_assert(t == (time_t)(12345678 + i));
+			test_assert(penalty_has_checksum(penalty, "foo", i));
+		}
+		test_assert(penalty_get(penalty, "foo", &t) == 5+i);
+		test_assert(t == (time_t)(12345678 + i));
+		test_assert(!penalty_has_checksum(penalty, "foo", j));
+	}
+	test_assert(penalty_get(penalty, "foo2", &t) == 0);
+
+	/* overflows checksum array */
+	ioloop_time = 12345678 + i;
+	penalty_inc(penalty, "foo", i, 5 + i);
+	penalty_inc(penalty, "foo", i, 5 + i);
+	penalty_inc(penalty, "foo", 0, 5 + i);
+
+	test_assert(penalty_get(penalty, "foo", &t) == 5+i);
+	test_assert(t == (time_t)(12345678 + i));
+	test_assert(!penalty_has_checksum(penalty, "foo", 1));
+
+	for (j = 2; j <= i; j++) {
+		test_assert(penalty_get(penalty, "foo", &t) == 5+i);
+		test_assert(t == (time_t)(12345678 + i));
+		test_assert(penalty_has_checksum(penalty, "foo", i));
+	}
+
+	penalty_deinit(&penalty);
+	io_loop_destroy(&ioloop);
+	test_end();
+}
+
+int main(void)
+{
+	static void (*const test_functions[])(void) = {
+		test_penalty_checksum,
+		NULL
+	};
+	return test_run(test_functions);
+}