--- /dev/null
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=exim
+PKG_VERSION:=4.94
+PKG_RELEASE:=1
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
+PKG_SOURCE_URL:=https://ftp.exim.org/pub/exim/exim4/
+PKG_HASH:=f77ee8faf04f5db793243c3ae81c1f4e452cd6ad7dd515a80edf755c4b144bdb
+PKG_MAINTAINER:=Daniel Golle <daniel@makrotopia.org>
+
+PKG_LICENSE:=GPL-2.0-or-later
+PKG_LICENSE_FILES:=LICENSE NOTICE
+PKG_CPE_ID:=cpe:/a:exim:exim
+
+PKG_CONFIG_DEPENDS:=\
+ CONFIG_BUILD_NLS \
+ CONFIG_PACKAGE_exim \
+ CONFIG_PACKAGE_exim-gnutls \
+ CONFIG_EXIM_GNUTLS_DANE \
+ CONFIG_PACKAGE_exim-openssl \
+ CONFIG_PACKAGE_exim-ldap \
+ CONFIG_PACKAGE_exim-lookup-mysql \
+ CONFIG_PACKAGE_exim-lookup-pgsql \
+ CONFIG_PACKAGE_exim-lookup-redis \
+ CONFIG_PACKAGE_exim-lookup-sqlite
+
+PKG_BUILD_PARALLEL:=1
+
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/host-build.mk
+include $(INCLUDE_DIR)/nls.mk
+
+LOOKUPS:= \
+ cdb \
+ dbmdb \
+ dnsdb \
+ json%+PACKAGE_exim-lookup-json:jansson \
+ mysql%+PACKAGE_exim-lookup-mysql:libmariadb \
+ passwd \
+ pgsql%+PACKAGE_exim-lookup-pgsql:libpq \
+ redis%+PACKAGE_exim-lookup-redis:libhiredis \
+ sqlite%+PACKAGE_exim-lookup-sqlite:libsqlite3
+
+define Package/exim/Default
+ SECTION:=mail
+ CATEGORY:=Mail
+ DEPENDS:=+libdb47 +libpcre $(ICONV_DEPENDS) +BUILD_NLS:libidn2 +BUILD_NLS:libidn
+ TITLE:=Exim message transfer agent
+ URL:=http://www.exim.org/
+ USERID:=mail=42:mail=42
+endef
+
+define Package/exim
+ $(call Package/exim/Default)
+ VARIANT:=nossl
+ CONFLICTS:=exim-openssl exim-gnutls exim-ldap
+endef
+
+define Package/exim-gnutls
+ $(call Package/exim/Default)
+ TITLE+=(with GnuTLS)
+ VARIANT:=gnutls
+ DEPENDS+=+PACKAGE_exim-gnutls:libgnutls +EXIM_GNUTLS_DANE:libgnutls-dane
+ PROVIDES:=exim
+ CONFLICTS:=exim-openssl exim-ldap
+endef
+define Package/exim-openssl
+ $(call Package/exim/Default)
+ TITLE+=(with OpenSSL)
+ VARIANT:=openssl
+ DEPENDS+=+PACKAGE_exim-openssl:libopenssl
+ PROVIDES:=exim
+ CONFLICTS:=exim-ldap
+endef
+
+define Package/exim-ldap
+ $(call Package/exim/Default)
+ TITLE+=(with OpenSSL and OpenLDAP)
+ VARIANT:=ldap
+ DEPENDS+=+PACKAGE_exim-ldap:libopenssl +PACKAGE_exim-ldap:libsasl2 +PACKAGE_exim-ldap:libopenldap
+ PROVIDES:=exim
+endef
+
+define Package/exim/Default/description
+Exim is a message transfer agent (MTA) developed at the University of
+Cambridge for use on Unix systems connected to the Internet.
+endef
+
+define Package/exim/description
+$(call Package/exim/Default/description)
+
+This package provides Exim without TLS support.
+endef
+
+define Package/exim-gnutls/description
+$(call Package/exim/Default/description)
+
+This package provides Exim built with GnuTLS.
+endef
+
+define Package/exim-gnutls/config
+ config EXIM_GNUTLS_DANE
+ bool "exim-gnutls DANE support"
+ depends on PACKAGE_exim-gnutls
+ default n
+ help
+ Build exim-gnutls against libgnutls-dane for DANE support.
+ libgnutls-dane depends on libunbound which depends on libopenssl.
+endef
+
+define Package/exim-openssl/description
+$(call Package/exim/Default/description)
+
+This package provides Exim built with OpenSSL.
+endef
+
+define Package/exim-ldap/description
+$(call Package/exim/Default/description)
+
+This package provides Exim built with OpenSSL, OpenLDAP and Cyrus SASL.
+endef
+
+define LookupGen
+define Package/exim-lookup-$(subst _,-,$(firstword $(subst %, ,$(1))))
+ SECTION:=mail
+ CATEGORY:=Mail
+ TITLE:=Exim lookup module $(firstword $(subst %, ,$(1)))
+ URL:=http://www.exim.org/
+ DEPENDS:=exim $(wordlist 2,$(words $(subst %, ,$(1))),$(subst %, ,$(1)))
+endef
+endef
+
+$(foreach file,$(LOOKUPS),$(eval $(call LookupGen,$(file))))
+
+define Package/exim/conffiles
+/etc/exim/exim.conf
+endef
+
+TARGET_CFLAGS += $(FPIC) -DNO_IP_OPTIONS -D_FILE_OFFSET_BITS=64
+
+MAKE_VARS += build=Linux-$$(ARCH)
+MAKE_FLAGS += AR="$$(TARGET_AR) r"
+HOST_MAKE_VARS += build=Linux-$$(ARCH)
+
+define Build/Configure
+ $(CP) $(PKG_BUILD_DIR)/src/EDITME $(PKG_BUILD_DIR)/Local/Makefile
+ echo "PID_FILE_PATH=/var/run/exim.pid" >> $(PKG_BUILD_DIR)/Local/Makefile
+ echo "BIN_DIRECTORY=/usr/sbin" >> $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%CONFIGURE_FILE=/usr/exim/configure%CONFIGURE_FILE=/etc/exim/exim.conf%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# EXIM_GROUP=%EXIM_GROUP=42%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# EXIM_USER=exim%EXIM_USER=42%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# INCLUDE=.*%INCLUDE=-I$(STAGING_DIR)/usr/include -I$(STAGING_DIR)/usr/include%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# HAVE_IPV6=YES%HAVE_IPV6=YES%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# WITH_CONTENT_SCAN=yes%WITH_CONTENT_SCAN=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# SUPPORT_MAILDIR=yes%SUPPORT_MAILDIR=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# SUPPORT_MAILSTORE=yes%SUPPORT_MAILSTORE=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# SUPPORT_MBX=yes%SUPPORT_MBX=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+# enable lookup modules
+ $(SED) 's%# LOOKUP_DSEARCH=yes%LOOKUP_DSEARCH=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ifdef CONFIG_PACKAGE_exim-lookup-dbmdb
+ $(SED) 's%LOOKUP_DBM=yes%LOOKUP_DBM=2%' $(PKG_BUILD_DIR)/Local/Makefile
+else
+ $(SED) 's%LOOKUP_DBM=yes%# LOOKUP_DBM=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+ifdef CONFIG_PACKAGE_exim-lookup-dnsdb
+ $(SED) 's%LOOKUP_DNSDB=yes%LOOKUP_DNSDB=2%' $(PKG_BUILD_DIR)/Local/Makefile
+else
+ $(SED) 's%LOOKUP_DNSDB=yes%# LOOKUP_DNSDB=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+ifdef CONFIG_PACKAGE_exim-lookup-passwd
+ $(SED) 's%# LOOKUP_PASSWD=yes%LOOKUP_PASSWD=2%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+ifdef CONFIG_PACKAGE_exim-lookup-cdb
+ $(SED) 's%# LOOKUP_CDB=yes%LOOKUP_CDB=2%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+ifdef CONFIG_PACKAGE_exim-lookup-json
+ $(SED) 's%# LOOKUP_JSON=yes%LOOKUP_JSON=2\
+ \nLOOKUP_JSON_INCLUDE=-I$(STAGING_DIR)/usr/include\
+ \nLOOKUP_JSON_LIBS=-Wl,--no-as-needed -ljansson%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+ifdef CONFIG_PACKAGE_exim-lookup-pgsql
+ $(SED) 's%# LOOKUP_PGSQL=yes%LOOKUP_PGSQL=2\
+ \nLOOKUP_PGSQL_LIBS=-Wl,--no-as-needed -lpq%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+ifdef CONFIG_PACKAGE_exim-lookup-sqlite
+ $(SED) 's%# LOOKUP_SQLITE=yes%LOOKUP_SQLITE=2\
+ \nLOOKUP_SQLITE_LIBS=-Wl,--no-as-needed -lsqlite3%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+ifdef CONFIG_PACKAGE_exim-lookup-mysql
+ $(SED) 's%# LOOKUP_MYSQL=yes%LOOKUP_MYSQL=2\
+ \nLOOKUP_MYSQL_INCLUDE=-I$(STAGING_DIR)/usr/include/mysql\
+ \nLOOKUP_MYSQL_LIBS=-Wl,--no-as-needed -lmysqlclient%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+ifdef CONFIG_PACKAGE_exim-lookup-redis
+ $(SED) 's%# LOOKUP_REDIS=yes%LOOKUP_REDIS=2\
+ \nLOOKUP_REDIS_INCLUDE=-I$(STAGING_DIR)/usr/include/hiredis\
+ \nLOOKUP_REDIS_LIBS=-Wl,--no-as-needed -lhiredis%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+
+ifeq ($(CONFIG_BUILD_NLS),y)
+ $(SED) 's%# HAVE_ICONV=yes%HAVE_ICONV=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# CFLAGS=-O -I/usr/local/include%CFLAGS=$(TARGET_CFLAGS) $(ICONV_CPPFLAGS)%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# EXTRALIBS_EXIM=-L/usr/local/lib -liconv%EXTRALIBS_EXIM=-export-dynamic -rdynamic $(ICONV_LDFLAGS) -liconv -ldl%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# SUPPORT_I18N_2008=yes%SUPPORT_I18N_2008=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# LDFLAGS += -lidn -lidn2%LDFLAGS += -lidn -lidn2%' $(PKG_BUILD_DIR)/Local/Makefile
+else
+ $(SED) 's%# HAVE_ICONV=yes%HAVE_ICONV=no%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+
+ $(SED) 's%# AUTH_CRAM_MD5=yes%AUTH_CRAM_MD5=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# AUTH_DOVECOT=yes%AUTH_DOVECOT=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# AUTH_EXTERNAL=yes%AUTH_EXTERNAL=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# AUTH_PLAINTEXT=yes%AUTH_PLAINTEXT=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# AUTH_SPA=yes%AUTH_SPA=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+
+ifeq ($(BUILD_VARIANT),gnutls)
+ $(SED) 's%# USE_GNUTLS=yes%USE_GNUTLS=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# TLS_INCLUDE=-I/usr/local/.*%TLS_INCLUDE=-I$(STAGING_DIR)/usr/include%' $(PKG_BUILD_DIR)/Local/Makefile
+ifeq ($(CONFIG_EXIM_GNUTLS_DANE),y)
+ $(SED) 's%# TLS_LIBS=-lgnutls -lgnutls-dane%TLS_LIBS=-L$(STAGING_DIR)/usr/lib -lgnutls -lgnutls-dane%' $(PKG_BUILD_DIR)/Local/Makefile
+else
+ $(SED) 's%SUPPORT_DANE=yes%# SUPPORT_DANE=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# TLS_LIBS=-lgnutls -lgnutls-dane%TLS_LIBS=-L$(STAGING_DIR)/usr/lib -lgnutls%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+ $(SED) 's%# AUTH_TLS=yes%AUTH_TLS=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+ifneq ($(filter ldap openssl, $(BUILD_VARIANT)),)
+ $(SED) 's%# USE_OPENSSL=yes%USE_OPENSSL=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# TLS_INCLUDE=-I/usr/local/.*%TLS_INCLUDE=-I$(STAGING_DIR)/usr/include%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# TLS_LIBS=-lssl -lcrypto%TLS_LIBS=-L$(STAGING_DIR)/usr/lib -lssl -lcrypto%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# AUTH_TLS=yes%AUTH_TLS=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+ifeq ($(BUILD_VARIANT),ldap)
+ $(SED) 's%# LOOKUP_LDAP=yes%LOOKUP_LDAP=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# LDAP_LIB_TYPE=OPENLDAP2%LDAP_LIB_TYPE=OPENLDAP2%' $(PKG_BUILD_DIR)/Local/Makefile
+ echo "LOOKUP_LIBS+=-lldap -llber" >> $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# AUTH_CYRUS_SASL=yes%AUTH_CYRUS_SASL=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# AUTH_LIBS=-lsasl2%AUTH_LIBS=-lsasl2%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+ifeq ($(BUILD_VARIANT),nossl)
+ $(SED) 's%# DISABLE_TLS=yes%DISABLE_TLS=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%SUPPORT_DANE=yes%# SUPPORT_DANE=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+endif
+ $(SED) 's%# CFLAGS_DYNAMIC=-shared -rdynamic -fPIC%CFLAGS_DYNAMIC=-shared -rdynamic $(FPIC)%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%# LOOKUP_MODULE_DIR=/usr/lib/exim/lookups/%LOOKUP_MODULE_DIR=/usr/lib/exim/lookups/%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(SED) 's%#DLOPEN_LOCAL_SCAN=yes%DLOPEN_LOCAL_SCAN=yes%' $(PKG_BUILD_DIR)/Local/Makefile
+ $(call Build/Compile/Default,makefile)
+ $(CP) $(PKG_BUILD_DIR)/OS/os.h-Linux $(PKG_BUILD_DIR)/build-Linux-$(ARCH)/os.h
+ # overwrite types for cross-compile
+ # (is all the below true for glibc as well?)
+ echo '#include <inttypes.h>' >> $(PKG_BUILD_DIR)/build-Linux-$(ARCH)/os.h
+ echo '#define ip_options ip_opts' >> $(PKG_BUILD_DIR)/build-Linux-$(ARCH)/os.h
+ echo '#undef OFF_T_FMT' >> $(PKG_BUILD_DIR)/build-Linux-$(ARCH)/os.h
+ echo '#define OFF_T_FMT "%" PRId64' >> $(PKG_BUILD_DIR)/build-Linux-$(ARCH)/os.h
+ echo '#undef LONGLONG_T' >> $(PKG_BUILD_DIR)/build-Linux-$(ARCH)/os.h
+ echo '#define LONGLONG_T int64_t' >> $(PKG_BUILD_DIR)/build-Linux-$(ARCH)/os.h
+ echo '#ifndef NS_MAXMSG' >> $(PKG_BUILD_DIR)/build-Linux-$(ARCH)/os.h
+ echo '#define NS_MAXMSG 65535' >> $(PKG_BUILD_DIR)/build-Linux-$(ARCH)/os.h
+ echo '#endif' >> $(PKG_BUILD_DIR)/build-Linux-$(ARCH)/os.h
+ $(HOST_MAKE_VARS) $(MAKE) $(HOST_MAKE_FLAGS) $(HOST_MAKE_VARS) -C $(PKG_BUILD_DIR)/build-Linux-$(ARCH) macro_predef
+endef
+
+define Package/exim/install
+ $(INSTALL_DIR) $(1)/usr/sbin
+ $(INSTALL_BIN) $(PKG_BUILD_DIR)/build-Linux-$(ARCH)/exim $(1)/usr/sbin
+endef
+
+Package/exim-gnutls/install = $(Package/exim/install)
+Package/exim-openssl/install = $(Package/exim/install)
+Package/exim-ldap/install = $(Package/exim/install)
+
+define LookupInstall
+define Package/exim-lookup-$(subst _,-,$(firstword $(subst %, ,$(1))))/install
+ $(INSTALL_DIR) $$(1)/usr/lib/exim/lookups
+ $(INSTALL_BIN) \
+ $(PKG_BUILD_DIR)/build-Linux-$(ARCH)/lookups/$(firstword $(subst %, ,$(1))).so \
+ $$(1)/usr/lib/exim/lookups
+endef
+endef
+
+$(foreach file,$(LOOKUPS),$(eval $(call LookupInstall,$(file))))
+
+$(eval $(call BuildPackage,exim))
+$(eval $(call BuildPackage,exim-gnutls))
+$(eval $(call BuildPackage,exim-openssl))
+$(eval $(call BuildPackage,exim-ldap))
+$(foreach file,$(LOOKUPS),$(eval $(call BuildPackage,exim-lookup-$(subst _,-,$(firstword $(subst %, ,$(file)))))))
--- /dev/null
+--- a/src/config.h.defaults
++++ b/src/config.h.defaults
+@@ -33,6 +33,8 @@ Do not put spaces between # and the 'def
+
+ #define AUTH_VARS 3
+
++#define DLOPEN_LOCAL_SCAN
++
+ #define BIN_DIRECTORY
+
+ #define CONFIGURE_FILE
+--- a/src/EDITME
++++ b/src/EDITME
+@@ -877,6 +877,24 @@ HEADERS_CHARSET="ISO-8859-1"
+
+
+ #------------------------------------------------------------------------------
++# On systems which support dynamic loading of shared libraries, Exim can
++# load a local_scan function specified in its config file instead of having
++# to be recompiled with the desired local_scan function. For a full
++# description of the API to this function, see the Exim specification.
++
++#DLOPEN_LOCAL_SCAN=yes
++
++# If you set DLOPEN_LOCAL_SCAN, then you need to include -rdynamic in the
++# linker flags. Without it, the loaded .so won't be able to access any
++# functions from exim.
++
++LFLAGS = -rdynamic
++ifeq ($(OSTYPE),Linux)
++LFLAGS += -ldl
++endif
++
++
++#------------------------------------------------------------------------------
+ # The default distribution of Exim contains only the plain text form of the
+ # documentation. Other forms are available separately. If you want to install
+ # the documentation in "info" format, first fetch the Texinfo documentation
+--- a/src/globals.c
++++ b/src/globals.c
+@@ -42,6 +42,10 @@ int optionlist_auths_size = nelem(op
+
+ uschar *no_aliases = NULL;
+
++#ifdef DLOPEN_LOCAL_SCAN
++uschar *local_scan_path = NULL;
++#endif
++
+
+ /* For comments on these variables, see globals.h. I'm too idle to
+ duplicate them here... */
+--- a/src/globals.h
++++ b/src/globals.h
+@@ -162,6 +162,9 @@ extern int (*receive_feof)(void);
+ extern int (*receive_ferror)(void);
+ extern BOOL (*receive_smtp_buffered)(void);
+
++#ifdef DLOPEN_LOCAL_SCAN
++extern uschar *local_scan_path; /* Path to local_scan() library */
++#endif
+
+ /* For clearing, saving, restoring address expansion variables. We have to have
+ the size of this vector set explicitly, because it is referenced from more than
+--- a/src/local_scan.c
++++ b/src/local_scan.c
+@@ -5,61 +5,133 @@
+ /* Copyright (c) University of Cambridge 1995 - 2009 */
+ /* See the file NOTICE for conditions of use and distribution. */
+
+-
+-/******************************************************************************
+-This file contains a template local_scan() function that just returns ACCEPT.
+-If you want to implement your own version, you should copy this file to, say
+-Local/local_scan.c, and edit the copy. To use your version instead of the
+-default, you must set
+-
+-HAVE_LOCAL_SCAN=yes
+-LOCAL_SCAN_SOURCE=Local/local_scan.c
+-
+-in your Local/Makefile. This makes it easy to copy your version for use with
+-subsequent Exim releases.
+-
+-For a full description of the API to this function, see the Exim specification.
+-******************************************************************************/
+-
+-
+-/* This is the only Exim header that you should include. The effect of
+-including any other Exim header is not defined, and may change from release to
+-release. Use only the documented interface! */
+-
+ #include "local_scan.h"
+
+-
+-/* This is a "do-nothing" version of a local_scan() function. The arguments
+-are:
+-
+- fd The file descriptor of the open -D file, which contains the
+- body of the message. The file is open for reading and
+- writing, but modifying it is dangerous and not recommended.
+-
+- return_text A pointer to an unsigned char* variable which you can set in
+- order to return a text string. It is initialized to NULL.
+-
+-The return values of this function are:
+-
+- LOCAL_SCAN_ACCEPT
+- The message is to be accepted. The return_text argument is
+- saved in $local_scan_data.
+-
+- LOCAL_SCAN_REJECT
+- The message is to be rejected. The returned text is used
+- in the rejection message.
+-
+- LOCAL_SCAN_TEMPREJECT
+- This specifies a temporary rejection. The returned text
+- is used in the rejection message.
+-*/
++#ifdef DLOPEN_LOCAL_SCAN
++#include <stdlib.h>
++#include <dlfcn.h>
++static int (*local_scan_fn)(int fd, uschar **return_text) = NULL;
++static int load_local_scan_library(void);
++extern uschar *local_scan_path; /* Path to local_scan() library */
++#endif
+
+ int
+ local_scan(int fd, uschar **return_text)
+ {
+ fd = fd; /* Keep picky compilers happy */
+ return_text = return_text;
+-return LOCAL_SCAN_ACCEPT;
++#ifdef DLOPEN_LOCAL_SCAN
++/* local_scan_path is defined AND not the empty string */
++if (local_scan_path && *local_scan_path)
++ {
++ if (!local_scan_fn)
++ {
++ if (!load_local_scan_library())
++ {
++ char *base_msg , *error_msg , *final_msg ;
++ int final_length = -1 ;
++
++ base_msg=US"Local configuration error - local_scan() library failure\n";
++ error_msg = dlerror() ;
++
++ final_length = strlen(base_msg) + strlen(error_msg) + 1 ;
++ final_msg = (char*)malloc( final_length*sizeof(char) ) ;
++ *final_msg = '\0' ;
++
++ strcat( final_msg , base_msg ) ;
++ strcat( final_msg , error_msg ) ;
++
++ *return_text = final_msg ;
++ return LOCAL_SCAN_TEMPREJECT;
++ }
++ }
++ return local_scan_fn(fd, return_text);
++ }
++else
++#endif
++ return LOCAL_SCAN_ACCEPT;
+ }
+
++#ifdef DLOPEN_LOCAL_SCAN
++
++static int load_local_scan_library(void)
++{
++/* No point in keeping local_scan_lib since we'll never dlclose() anyway */
++void *local_scan_lib = NULL;
++int (*local_scan_version_fn)(void);
++int vers_maj;
++int vers_min;
++
++local_scan_lib = dlopen(local_scan_path, RTLD_NOW);
++if (!local_scan_lib)
++ {
++ log_write(0, LOG_MAIN|LOG_REJECT, "local_scan() library open failed - "
++ "message temporarily rejected");
++ return FALSE;
++ }
++
++local_scan_version_fn = dlsym(local_scan_lib, "local_scan_version_major");
++if (!local_scan_version_fn)
++ {
++ dlclose(local_scan_lib);
++ log_write(0, LOG_MAIN|LOG_REJECT, "local_scan() library doesn't contain "
++ "local_scan_version_major() function - message temporarily rejected");
++ return FALSE;
++ }
++
++/* The major number is increased when the ABI is changed in a non
++ backward compatible way. */
++vers_maj = local_scan_version_fn();
++
++local_scan_version_fn = dlsym(local_scan_lib, "local_scan_version_minor");
++if (!local_scan_version_fn)
++ {
++ dlclose(local_scan_lib);
++ log_write(0, LOG_MAIN|LOG_REJECT, "local_scan() library doesn't contain "
++ "local_scan_version_minor() function - message temporarily rejected");
++ return FALSE;
++ }
++
++/* The minor number is increased each time a new feature is added (in a
++ way that doesn't break backward compatibility) -- Marc */
++vers_min = local_scan_version_fn();
++
++
++if (vers_maj != LOCAL_SCAN_ABI_VERSION_MAJOR)
++ {
++ dlclose(local_scan_lib);
++ local_scan_lib = NULL;
++ log_write(0, LOG_MAIN|LOG_REJECT, "local_scan() has an incompatible major"
++ "version number, you need to recompile your module for this version"
++ "of exim (The module was compiled for version %d.%d and this exim provides"
++ "ABI version %d.%d)", vers_maj, vers_min, LOCAL_SCAN_ABI_VERSION_MAJOR,
++ LOCAL_SCAN_ABI_VERSION_MINOR);
++ return FALSE;
++ }
++else if (vers_min > LOCAL_SCAN_ABI_VERSION_MINOR)
++ {
++ dlclose(local_scan_lib);
++ local_scan_lib = NULL;
++ log_write(0, LOG_MAIN|LOG_REJECT, "local_scan() has an incompatible minor"
++ "version number, you need to recompile your module for this version"
++ "of exim (The module was compiled for version %d.%d and this exim provides"
++ "ABI version %d.%d)", vers_maj, vers_min, LOCAL_SCAN_ABI_VERSION_MAJOR,
++ LOCAL_SCAN_ABI_VERSION_MINOR);
++ return FALSE;
++ }
++
++local_scan_fn = dlsym(local_scan_lib, "local_scan");
++if (!local_scan_fn)
++ {
++ dlclose(local_scan_lib);
++ log_write(0, LOG_MAIN|LOG_REJECT, "local_scan() library doesn't contain "
++ "local_scan() function - message temporarily rejected");
++ return FALSE;
++ }
++
++return TRUE;
++}
++
++#endif /* DLOPEN_LOCAL_SCAN */
++
+ /* End of local_scan.c */
+--- a/src/readconf.c
++++ b/src/readconf.c
+@@ -205,6 +205,9 @@ static optionlist optionlist_config[] =
+ { "local_from_prefix", opt_stringptr, {&local_from_prefix} },
+ { "local_from_suffix", opt_stringptr, {&local_from_suffix} },
+ { "local_interfaces", opt_stringptr, {&local_interfaces} },
++#ifdef DLOPEN_LOCAL_SCAN
++ { "local_scan_path", opt_stringptr, {&local_scan_path} },
++#endif
+ #ifdef HAVE_LOCAL_SCAN
+ { "local_scan_timeout", opt_time, {&local_scan_timeout} },
+ #endif
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