+
+#ifdef WITH_CONTENT_SCAN
+ /* MIME ACL hook */
+ if (acl_smtp_mime != NULL && recipients_count > 0)
+ {
+ FILE *mbox_file;
+ uschar rfc822_file_path[2048];
+ unsigned long mbox_size;
+ header_line *my_headerlist;
+ uschar *user_msg, *log_msg;
+ int mime_part_count_buffer = -1;
+
+ memset(CS rfc822_file_path,0,2048);
+
+ /* check if it is a MIME message */
+ my_headerlist = header_list;
+ while (my_headerlist != NULL) {
+ /* skip deleted headers */
+ if (my_headerlist->type == '*') {
+ my_headerlist = my_headerlist->next;
+ continue;
+ };
+ if (strncmpic(my_headerlist->text, US"Content-Type:", 13) == 0) {
+ DEBUG(D_receive) debug_printf("Found Content-Type: header - executing acl_smtp_mime.\n");
+ goto DO_MIME_ACL;
+ };
+ my_headerlist = my_headerlist->next;
+ };
+
+ DEBUG(D_receive) debug_printf("No Content-Type: header - presumably not a MIME message.\n");
+ goto NO_MIME_ACL;
+
+ DO_MIME_ACL:
+ /* make sure the eml mbox file is spooled up */
+ mbox_file = spool_mbox(&mbox_size);
+ if (mbox_file == NULL) {
+ /* error while spooling */
+ log_write(0, LOG_MAIN|LOG_PANIC,
+ "acl_smtp_mime: error while creating mbox spool file, message temporarily rejected.");
+ Uunlink(spool_name);
+ unspool_mbox();
+ smtp_respond(451, TRUE, US"temporary local problem");
+ message_id[0] = 0; /* Indicate no message accepted */
+ smtp_reply = US""; /* Indicate reply already sent */
+ goto TIDYUP; /* Skip to end of function */
+ };
+
+ mime_is_rfc822 = 0;
+
+ MIME_ACL_CHECK:
+ mime_part_count = -1;
+ rc = mime_acl_check(mbox_file, NULL, &user_msg, &log_msg);
+ fclose(mbox_file);
+
+ if (Ustrlen(rfc822_file_path) > 0) {
+ mime_part_count = mime_part_count_buffer;
+
+ if (unlink(CS rfc822_file_path) == -1) {
+ log_write(0, LOG_PANIC,
+ "acl_smtp_mime: can't unlink RFC822 spool file, skipping.");
+ goto END_MIME_ACL;
+ };
+ };
+
+ /* check if we must check any message/rfc822 attachments */
+ if (rc == OK) {
+ uschar temp_path[1024];
+ int n;
+ struct dirent *entry;
+ DIR *tempdir;
+
+ snprintf(CS temp_path, 1024, "%s/scan/%s", spool_directory, message_id);
+
+ tempdir = opendir(CS temp_path);
+ n = 0;
+ do {
+ entry = readdir(tempdir);
+ if (entry == NULL) break;
+ if (strncmpic(US entry->d_name,US"__rfc822_",9) == 0) {
+ snprintf(CS rfc822_file_path, 2048,"%s/scan/%s/%s", spool_directory, message_id, entry->d_name);
+ debug_printf("RFC822 attachment detected: running MIME ACL for '%s'\n", rfc822_file_path);
+ break;
+ };
+ } while (1);
+ closedir(tempdir);
+
+ if (entry != NULL) {
+ mbox_file = Ufopen(rfc822_file_path,"r");
+ if (mbox_file == NULL) {
+ log_write(0, LOG_PANIC,
+ "acl_smtp_mime: can't open RFC822 spool file, skipping.");
+ unlink(CS rfc822_file_path);
+ goto END_MIME_ACL;
+ };
+ /* set RFC822 expansion variable */
+ mime_is_rfc822 = 1;
+ mime_part_count_buffer = mime_part_count;
+ goto MIME_ACL_CHECK;
+ };
+ };
+
+ END_MIME_ACL:
+ add_acl_headers(US"MIME");
+ if (rc == DISCARD)
+ {
+ recipients_count = 0;
+ blackholed_by = US"MIME ACL";
+ }
+ else if (rc != OK)
+ {
+ Uunlink(spool_name);
+ unspool_mbox();
+ if (smtp_handle_acl_fail(ACL_WHERE_MIME, rc, user_msg, log_msg) != 0)
+ smtp_yield = FALSE; /* No more messsages after dropped connection */
+ smtp_reply = US""; /* Indicate reply already sent */
+ message_id[0] = 0; /* Indicate no message accepted */
+ goto TIDYUP; /* Skip to end of function */
+ };
+ }
+
+ NO_MIME_ACL:
+#endif /* WITH_CONTENT_SCAN */
+
+