Adding upstream version 3.5.24.upstream/3.5.24upstream

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

1 files changed, 655 insertions, 0 deletions

diff --git a/src/global/header_body_checks.c b/src/global/header_body_checks.c
new file mode 100644
index 0000000..0252dd1
--- /dev/null
+++ b/src/global/header_body_checks.c
@@ -0,0 +1,655 @@
+/*++
+/* NAME
+/*	header_body_checks 3
+/* SUMMARY
+/*	header/body checks
+/* SYNOPSIS
+/*	#include <header_body_checks.h>
+/*
+/*	typedef struct {
+/*		void	(*logger) (void *context, const char *action,
+/*				const char *where, const char *line,
+/*				const char *optional_text);
+/*		void	(*prepend) (void *context, int rec_type,
+/*				const char *buf, ssize_t len, off_t offset);
+/*		char	*(*extend) (void *context, const char *command,
+/*				ssize_t cmd_len, const char *cmd_args,
+/*				const char *where, const char *line,
+/*				ssize_t line_len, off_t offset);
+/*	} HBC_CALL_BACKS;
+/*
+/*	HBC_CHECKS *hbc_header_checks_create(
+/*			header_checks_name, header_checks_value
+/*			mime_header_checks_name, mime_header_checks_value,
+/*			nested_header_checks_name, nested_header_checks_value,
+/*			call_backs)
+/*	const char *header_checks_name;
+/*	const char *header_checks_value;
+/*	const char *mime_header_checks_name;
+/*	const char *mime_header_checks_value;
+/*	const char *nested_header_checks_name;
+/*	const char *nested_header_checks_value;
+/*	HBC_CALL_BACKS *call_backs;
+/*
+/*	HBC_CHECKS *hbc_body_checks_create(
+/*			body_checks_name, body_checks_value,
+/*			call_backs)
+/*	const char *body_checks_name;
+/*	const char *body_checks_value;
+/*	HBC_CALL_BACKS *call_backs;
+/*
+/*	char	*hbc_header_checks(context, hbc, header_class, hdr_opts, header)
+/*	void	*context;
+/*	HBC_CHECKS *hbc;
+/*	int	header_class;
+/*	const HEADER_OPTS *hdr_opts;
+/*	VSTRING *header;
+/*
+/*	char	*hbc_body_checks(context, hbc, body_line, body_line_len)
+/*	void	*context;
+/*	HBC_CHECKS *hbc;
+/*	const char *body_line;
+/*	ssize_t	body_line_len;
+/*
+/*	void	hbc_header_checks_free(hbc)
+/*	HBC_CHECKS *hbc;
+/*
+/*	void	hbc_body_checks_free(hbc)
+/*	HBC_CHECKS *hbc;
+/* DESCRIPTION
+/*	This module implements header_checks and body_checks.
+/*	Actions are executed while mail is being delivered. The
+/*	following actions are recognized: INFO, WARN, REPLACE,
+/*	PREPEND, IGNORE, DUNNO, and OK. These actions are safe for
+/*	use in delivery agents.
+/*
+/*	Other actions may be supplied via the extension mechanism
+/*	described below.  For example, actions that change the
+/*	message delivery time or destination. Such actions do not
+/*	make sense in delivery agents, but they can be appropriate
+/*	in, for example, before-queue filters.
+/*
+/*	hbc_header_checks_create() creates a context for header
+/*	inspection. This function is typically called once during
+/*	program initialization.  The result is a null pointer when
+/*	all _value arguments specify zero-length strings; in this
+/*	case, hbc_header_checks() and hbc_header_checks_free() must
+/*	not be called.
+/*
+/*	hbc_header_checks() inspects the specified logical header.
+/*	The result is either the original header, HBC_CHECKS_STAT_IGNORE
+/*	(meaning: discard the header), HBC_CHECKS_STAT_ERROR, or a
+/*	new header (meaning: replace the header and destroy the new
+/*	header with myfree()).
+/*
+/*	hbc_header_checks_free() returns memory to the pool.
+/*
+/*	hbc_body_checks_create(), hbc_body_checks(), hbc_body_free()
+/*	perform similar functions for body lines.
+/*
+/*	Arguments:
+/* .IP body_line
+/*	One line of body text.
+/* .IP body_line_len
+/*	Body line length.
+/* .IP call_backs
+/*	Table with call-back function pointers. This argument is
+/*	not copied.  Note: the description below is not necessarily
+/*	in data structure order.
+/* .RS
+/* .IP logger
+/*	Call-back function for logging an action with the action's
+/*	name in lower case, a location within a message ("header"
+/*	or "body"), the content of the header or body line that
+/*	triggered the action, and optional text or a zero-length
+/*	string. This call-back feature must be specified.
+/* .IP prepend
+/*	Call-back function for the PREPEND action. The arguments
+/*	are the same as those of mime_state(3) body output call-back
+/*	functions.  Specify a null pointer to disable this action.
+/* .IP extend
+/*	Call-back function that logs and executes other actions.
+/*	This function receives as arguments the command name and
+/*	name length, the command arguments if any, the location
+/*	within the message ("header" or "body"), the content and
+/*	length of the header or body line that triggered the action,
+/*	and the input byte offset within the current header or body
+/*	segment.  The result value is either the original line
+/*	argument, HBC_CHECKS_STAT_IGNORE (delete the line from the
+/*	input stream) or HBC_CHECKS_STAT_UNKNOWN (the command was
+/*	not recognized).  Specify a null pointer to disable this
+/*	feature.
+/* .RE
+/* .IP context
+/*	Application context for call-back functions specified with the
+/*	call_backs argument.
+/* .IP header
+/*	A logical message header. Lines within a multi-line header
+/*	are separated by a newline character.
+/* .IP "header_checks_name, mime_header_checks_name"
+/* .IP "nested_header_checks_name, body_checks_name"
+/*	The main.cf configuration parameter names for header and body
+/*	map lists.
+/* .IP "header_checks_value, mime_header_checks_value"
+/* .IP "nested_header_checks_value, body_checks_value"
+/*	The values of main.cf configuration parameters for header and body
+/*	map lists. Specify a zero-length string to disable a specific list.
+/* .IP header_class
+/*	A number in the range MIME_HDR_FIRST..MIME_HDR_LAST.
+/* .IP hbc
+/*	A handle created with hbc_header_checks_create() or
+/*	hbc_body_checks_create().
+/* .IP hdr_opts
+/*	Message header properties.
+/* SEE ALSO
+/*	msg(3) diagnostics interface
+/* DIAGNOSTICS
+/*	Fatal errors: memory allocation problem.
+/* LICENSE
+/* .ad
+/* .fi
+/*	The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/*	Wietse Venema
+/*	IBM T.J. Watson Research
+/*	P.O. Box 704
+/*	Yorktown Heights, NY 10598, USA
+/*
+/*	Wietse Venema
+/*	Google, Inc.
+/*	111 8th Avenue
+/*	New York, NY 10011, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <ctype.h>
+#include <string.h>
+#ifdef STRCASECMP_IN_STRINGS_H
+#include <strings.h>
+#endif
+
+/* Utility library. */
+
+#include <msg.h>
+#include <mymalloc.h>
+
+/* Global library. */
+
+#include <mime_state.h>
+#include <rec_type.h>
+#include <is_header.h>
+#include <cleanup_user.h>
+#include <dsn_util.h>
+#include <header_body_checks.h>
+
+/* Application-specific. */
+
+ /*
+  * Something that is guaranteed to be different from a real string result
+  * from header/body_checks.
+  */
+char    hbc_checks_error;
+const char hbc_checks_unknown;
+
+ /*
+  * Header checks are stored as an array of HBC_MAP_INFO structures, one
+  * structure for each header class (MIME_HDR_PRIMARY, MIME_HDR_MULTIPART, or
+  * MIME_HDR_NESTED).
+  * 
+  * Body checks are stored as one single HBC_MAP_INFO structure, because we make
+  * no distinction between body segments.
+  */
+#define HBC_HEADER_INDEX(class)	((class) - MIME_HDR_FIRST)
+#define HBC_BODY_INDEX	(0)
+
+#define HBC_INIT(hbc, index, name, value) do { \
+	HBC_MAP_INFO *_mp = (hbc)->map_info + (index); \
+	if (*(value) != 0) { \
+	    _mp->map_class = (name); \
+	    _mp->maps = maps_create((name), (value), DICT_FLAG_LOCK); \
+	} else { \
+	    _mp->map_class = 0; \
+	    _mp->maps = 0; \
+	} \
+    } while (0)
+
+/* How does the action routine know where we are? */
+
+#define	HBC_CTXT_HEADER	"header"
+#define HBC_CTXT_BODY	"body"
+
+/* Silly little macros. */
+
+#define STR(x)	vstring_str(x)
+#define LEN(x)	VSTRING_LEN(x)
+
+/* hbc_action - act upon a header/body match */
+
+static char *hbc_action(void *context, HBC_CALL_BACKS *cb,
+			        const char *map_class, const char *where,
+			        const char *cmd, const char *line,
+			        ssize_t line_len, off_t offset)
+{
+    const char *cmd_args = cmd + strcspn(cmd, " \t");
+    ssize_t cmd_len = cmd_args - cmd;
+    char   *ret;
+
+    /*
+     * XXX We don't use a hash table for action lookup. Mail rarely triggers
+     * an action, and mail that triggers multiple actions is even rarer.
+     * Setting up the hash table costs more than we would gain from using it.
+     */
+    while (*cmd_args && ISSPACE(*cmd_args))
+	cmd_args++;
+
+#define STREQUAL(x,y,l) (strncasecmp((x), (y), (l)) == 0 && (y)[l] == 0)
+
+    if (cb->extend
+	&& (ret = cb->extend(context, cmd, cmd_len, cmd_args, where, line,
+			     line_len, offset)) != HBC_CHECKS_STAT_UNKNOWN)
+	return (ret);
+
+    if (STREQUAL(cmd, "WARN", cmd_len)) {
+	cb->logger(context, "warning", where, line, cmd_args);
+	return ((char *) line);
+    }
+    if (STREQUAL(cmd, "INFO", cmd_len)) {
+	cb->logger(context, "info", where, line, cmd_args);
+	return ((char *) line);
+    }
+    if (STREQUAL(cmd, "REPLACE", cmd_len)) {
+	if (*cmd_args == 0) {
+	    msg_warn("REPLACE action without text in %s map", map_class);
+	    return ((char *) line);
+	} else if (strcmp(where, HBC_CTXT_HEADER) == 0
+		   && !is_header(cmd_args)) {
+	    msg_warn("bad REPLACE header text \"%s\" in %s map -- "
+		   "need \"headername: headervalue\"", cmd_args, map_class);
+	    return ((char *) line);
+	} else {
+	    cb->logger(context, "replace", where, line, cmd_args);
+	    return (mystrdup(cmd_args));
+	}
+    }
+    if (cb->prepend && STREQUAL(cmd, "PREPEND", cmd_len)) {
+	if (*cmd_args == 0) {
+	    msg_warn("PREPEND action without text in %s map", map_class);
+	} else if (strcmp(where, HBC_CTXT_HEADER) == 0
+		   && !is_header(cmd_args)) {
+	    msg_warn("bad PREPEND header text \"%s\" in %s map -- "
+		   "need \"headername: headervalue\"", cmd_args, map_class);
+	} else {
+	    cb->logger(context, "prepend", where, line, cmd_args);
+	    cb->prepend(context, REC_TYPE_NORM, cmd_args, strlen(cmd_args), offset);
+	}
+	return ((char *) line);
+    }
+    if (STREQUAL(cmd, "STRIP", cmd_len)) {
+	cb->logger(context, "strip", where, line, cmd_args);
+	return (HBC_CHECKS_STAT_IGNORE);
+    }
+    /* Allow and ignore optional text after the action. */
+
+    if (STREQUAL(cmd, "IGNORE", cmd_len))
+	/* XXX Not logged for compatibility with cleanup(8). */
+	return (HBC_CHECKS_STAT_IGNORE);
+ 
+    if (STREQUAL(cmd, "DUNNO", cmd_len)		/* preferred */
+	||STREQUAL(cmd, "OK", cmd_len))		/* compatibility */
+	return ((char *) line);
+
+    msg_warn("unsupported command in %s map: %s", map_class, cmd);
+    return ((char *) line);
+}
+
+/* hbc_header_checks - process one complete header line */
+
+char   *hbc_header_checks(void *context, HBC_CHECKS *hbc, int header_class,
+			          const HEADER_OPTS *hdr_opts,
+			          VSTRING *header, off_t offset)
+{
+    const char *myname = "hbc_header_checks";
+    const char *action;
+    HBC_MAP_INFO *mp;
+
+    if (msg_verbose)
+	msg_info("%s: '%.30s'", myname, STR(header));
+
+    /*
+     * XXX This is for compatibility with the cleanup(8) server.
+     */
+    if (hdr_opts && (hdr_opts->flags & HDR_OPT_MIME))
+	header_class = MIME_HDR_MULTIPART;
+
+    mp = hbc->map_info + HBC_HEADER_INDEX(header_class);
+
+    if (mp->maps != 0 && (action = maps_find(mp->maps, STR(header), 0)) != 0) {
+	return (hbc_action(context, hbc->call_backs,
+			   mp->map_class, HBC_CTXT_HEADER, action,
+			   STR(header), LEN(header), offset));
+    } else if (mp->maps && mp->maps->error) {
+	return (HBC_CHECKS_STAT_ERROR);
+    } else {
+	return (STR(header));
+    }
+}
+
+/* hbc_body_checks - inspect one body record */
+
+char   *hbc_body_checks(void *context, HBC_CHECKS *hbc, const char *line,
+			        ssize_t len, off_t offset)
+{
+    const char *myname = "hbc_body_checks";
+    const char *action;
+    HBC_MAP_INFO *mp;
+
+    if (msg_verbose)
+	msg_info("%s: '%.30s'", myname, line);
+
+    mp = hbc->map_info;
+
+    if ((action = maps_find(mp->maps, line, 0)) != 0) {
+	return (hbc_action(context, hbc->call_backs,
+			   mp->map_class, HBC_CTXT_BODY, action,
+			   line, len, offset));
+    } else if (mp->maps->error) {
+	return (HBC_CHECKS_STAT_ERROR);
+    } else {
+	return ((char *) line);
+    }
+}
+
+/* hbc_header_checks_create - create header checking context */
+
+HBC_CHECKS *hbc_header_checks_create(const char *header_checks_name,
+				             const char *header_checks_value,
+				        const char *mime_header_checks_name,
+			               const char *mime_header_checks_value,
+			              const char *nested_header_checks_name,
+			             const char *nested_header_checks_value,
+				             HBC_CALL_BACKS *call_backs)
+{
+    HBC_CHECKS *hbc;
+
+    /*
+     * Optimize for the common case.
+     */
+    if (*header_checks_value == 0 && *mime_header_checks_value == 0
+	&& *nested_header_checks_value == 0) {
+	return (0);
+    } else {
+	hbc = (HBC_CHECKS *) mymalloc(sizeof(*hbc)
+		 + (MIME_HDR_LAST - MIME_HDR_FIRST) * sizeof(HBC_MAP_INFO));
+	hbc->call_backs = call_backs;
+	HBC_INIT(hbc, HBC_HEADER_INDEX(MIME_HDR_PRIMARY),
+		 header_checks_name, header_checks_value);
+	HBC_INIT(hbc, HBC_HEADER_INDEX(MIME_HDR_MULTIPART),
+		 mime_header_checks_name, mime_header_checks_value);
+	HBC_INIT(hbc, HBC_HEADER_INDEX(MIME_HDR_NESTED),
+		 nested_header_checks_name, nested_header_checks_value);
+	return (hbc);
+    }
+}
+
+/* hbc_body_checks_create - create body checking context */
+
+HBC_CHECKS *hbc_body_checks_create(const char *body_checks_name,
+				           const char *body_checks_value,
+				           HBC_CALL_BACKS *call_backs)
+{
+    HBC_CHECKS *hbc;
+
+    /*
+     * Optimize for the common case.
+     */
+    if (*body_checks_value == 0) {
+	return (0);
+    } else {
+	hbc = (HBC_CHECKS *) mymalloc(sizeof(*hbc));
+	hbc->call_backs = call_backs;
+	HBC_INIT(hbc, HBC_BODY_INDEX, body_checks_name, body_checks_value);
+	return (hbc);
+    }
+}
+
+/* _hbc_checks_free - destroy header/body checking context */
+
+void    _hbc_checks_free(HBC_CHECKS *hbc, ssize_t len)
+{
+    HBC_MAP_INFO *mp;
+
+    for (mp = hbc->map_info; mp < hbc->map_info + len; mp++)
+	if (mp->maps)
+	    maps_free(mp->maps);
+    myfree((void *) hbc);
+}
+
+ /*
+  * Test program. Specify the four maps on the command line, and feed a
+  * MIME-formatted message on stdin.
+  */
+
+#ifdef TEST
+
+#include <stdlib.h>
+#include <stringops.h>
+#include <vstream.h>
+#include <msg_vstream.h>
+#include <rec_streamlf.h>
+#include <mail_params.h>
+
+typedef struct {
+    HBC_CHECKS *header_checks;
+    HBC_CHECKS *body_checks;
+    HBC_CALL_BACKS *call_backs;
+    VSTREAM *fp;
+    VSTRING *buf;
+    const char *queueid;
+    int     recno;
+} HBC_TEST_CONTEXT;
+
+/*#define REC_LEN	40*/
+#define REC_LEN	1024
+
+/* log_cb - log action with context */
+
+static void log_cb(void *context, const char *action, const char *where,
+		           const char *content, const char *text)
+{
+    const HBC_TEST_CONTEXT *dp = (HBC_TEST_CONTEXT *) context;
+
+    if (*text) {
+	msg_info("%s: %s: %s %.200s: %s",
+		 dp->queueid, action, where, content, text);
+    } else {
+	msg_info("%s: %s: %s %.200s",
+		 dp->queueid, action, where, content);
+    }
+}
+
+/* out_cb - output call-back */
+
+static void out_cb(void *context, int rec_type, const char *buf,
+		           ssize_t len, off_t offset)
+{
+    const HBC_TEST_CONTEXT *dp = (HBC_TEST_CONTEXT *) context;
+
+    vstream_fwrite(dp->fp, buf, len);
+    VSTREAM_PUTC('\n', dp->fp);
+    vstream_fflush(dp->fp);
+}
+
+/* head_out - MIME_STATE header call-back */
+
+static void head_out(void *context, int header_class,
+		             const HEADER_OPTS *header_info,
+		             VSTRING *buf, off_t offset)
+{
+    HBC_TEST_CONTEXT *dp = (HBC_TEST_CONTEXT *) context;
+    char   *out;
+
+    if (dp->header_checks == 0
+	|| (out = hbc_header_checks(context, dp->header_checks, header_class,
+				    header_info, buf, offset)) == STR(buf)) {
+	vstring_sprintf(dp->buf, "%d %s %ld\t|%s",
+			dp->recno,
+			header_class == MIME_HDR_PRIMARY ? "MAIN" :
+			header_class == MIME_HDR_MULTIPART ? "MULT" :
+			header_class == MIME_HDR_NESTED ? "NEST" :
+			"ERROR", (long) offset, STR(buf));
+	out_cb(dp, REC_TYPE_NORM, STR(dp->buf), LEN(dp->buf), offset);
+    } else if (out != 0) {
+	vstring_sprintf(dp->buf, "%d %s %ld\t|%s",
+			dp->recno,
+			header_class == MIME_HDR_PRIMARY ? "MAIN" :
+			header_class == MIME_HDR_MULTIPART ? "MULT" :
+			header_class == MIME_HDR_NESTED ? "NEST" :
+			"ERROR", (long) offset, out);
+	out_cb(dp, REC_TYPE_NORM, STR(dp->buf), LEN(dp->buf), offset);
+	myfree(out);
+    }
+    dp->recno += 1;
+}
+
+/* header_end - MIME_STATE end-of-header call-back */
+
+static void head_end(void *context)
+{
+    HBC_TEST_CONTEXT *dp = (HBC_TEST_CONTEXT *) context;
+
+    out_cb(dp, 0, "HEADER END", sizeof("HEADER END") - 1, 0);
+}
+
+/* body_out - MIME_STATE body line call-back */
+
+static void body_out(void *context, int rec_type, const char *buf,
+		             ssize_t len, off_t offset)
+{
+    HBC_TEST_CONTEXT *dp = (HBC_TEST_CONTEXT *) context;
+    char   *out;
+
+    if (dp->body_checks == 0
+	|| (out = hbc_body_checks(context, dp->body_checks,
+				  buf, len, offset)) == buf) {
+	vstring_sprintf(dp->buf, "%d BODY %c %ld\t|%s",
+			dp->recno, rec_type, (long) offset, buf);
+	out_cb(dp, rec_type, STR(dp->buf), LEN(dp->buf), offset);
+    } else if (out != 0) {
+	vstring_sprintf(dp->buf, "%d BODY %c %ld\t|%s",
+			dp->recno, rec_type, (long) offset, out);
+	out_cb(dp, rec_type, STR(dp->buf), LEN(dp->buf), offset);
+	myfree(out);
+    }
+    dp->recno += 1;
+}
+
+/* body_end - MIME_STATE end-of-message call-back */
+
+static void body_end(void *context)
+{
+    HBC_TEST_CONTEXT *dp = (HBC_TEST_CONTEXT *) context;
+
+    out_cb(dp, 0, "BODY END", sizeof("BODY END") - 1, 0);
+}
+
+/* err_print - print MIME_STATE errors */
+
+static void err_print(void *unused_context, int err_flag,
+		              const char *text, ssize_t len)
+{
+    msg_warn("%s: %.*s", mime_state_error(err_flag),
+	     len < 100 ? (int) len : 100, text);
+}
+
+int     var_header_limit = 2000;
+int     var_mime_maxdepth = 20;
+int     var_mime_bound_len = 2000;
+char   *var_drop_hdrs = DEF_DROP_HDRS;
+
+int     main(int argc, char **argv)
+{
+    int     rec_type;
+    VSTRING *buf;
+    int     err;
+    MIME_STATE *mime_state;
+    HBC_TEST_CONTEXT context;
+    static HBC_CALL_BACKS call_backs[1] = {
+	log_cb,				/* logger */
+	out_cb,				/* prepend */
+    };
+
+    /*
+     * Sanity check.
+     */
+    if (argc != 5)
+	msg_fatal("usage: %s header_checks mime_header_checks nested_header_checks body_checks", argv[0]);
+
+    /*
+     * Initialize.
+     */
+#define MIME_OPTIONS \
+            (MIME_OPT_REPORT_8BIT_IN_7BIT_BODY \
+            | MIME_OPT_REPORT_8BIT_IN_HEADER \
+            | MIME_OPT_REPORT_ENCODING_DOMAIN \
+            | MIME_OPT_REPORT_TRUNC_HEADER \
+            | MIME_OPT_REPORT_NESTING \
+            | MIME_OPT_DOWNGRADE)
+    msg_vstream_init(basename(argv[0]), VSTREAM_OUT);
+    buf = vstring_alloc(10);
+    mime_state = mime_state_alloc(MIME_OPTIONS,
+				  head_out, head_end,
+				  body_out, body_end,
+				  err_print,
+				  (void *) &context);
+    context.header_checks =
+	hbc_header_checks_create("header_checks", argv[1],
+				 "mime_header_checks", argv[2],
+				 "nested_header_checks", argv[3],
+				 call_backs);
+    context.body_checks =
+	hbc_body_checks_create("body_checks", argv[4], call_backs);
+    context.buf = vstring_alloc(100);
+    context.fp = VSTREAM_OUT;
+    context.queueid = "test-queueID";
+    context.recno = 0;
+
+    /*
+     * Main loop.
+     */
+    do {
+	rec_type = rec_streamlf_get(VSTREAM_IN, buf, REC_LEN);
+	VSTRING_TERMINATE(buf);
+	err = mime_state_update(mime_state, rec_type, STR(buf), LEN(buf));
+	vstream_fflush(VSTREAM_OUT);
+    } while (rec_type > 0);
+
+    /*
+     * Error reporting.
+     */
+    if (err & MIME_ERR_TRUNC_HEADER)
+	msg_warn("message header length exceeds safety limit");
+    if (err & MIME_ERR_NESTING)
+	msg_warn("MIME nesting exceeds safety limit");
+    if (err & MIME_ERR_8BIT_IN_HEADER)
+	msg_warn("improper use of 8-bit data in message header");
+    if (err & MIME_ERR_8BIT_IN_7BIT_BODY)
+	msg_warn("improper use of 8-bit data in message body");
+    if (err & MIME_ERR_ENCODING_DOMAIN)
+	msg_warn("improper message/* or multipart/* encoding domain");
+
+    /*
+     * Cleanup.
+     */
+    if (context.header_checks)
+	hbc_header_checks_free(context.header_checks);
+    if (context.body_checks)
+	hbc_body_checks_free(context.body_checks);
+    vstring_free(context.buf);
+    mime_state_free(mime_state);
+    vstring_free(buf);
+    exit(0);
+}
+
+#endif