[exim] exiscan: handle drwebd errors

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Autor: Pavel Gulchouck
Data:  
A: tom
CC: exim-users
Assumptes vells: Re: [exim] exiscan: clamd at a remote host
Assumpte: [exim] exiscan: handle drwebd errors
On Tue, Sep 07, 2004 at 10:59:24AM +0300, Pavel Gulchouck writes:

PG> My tests shows that malware returns ok (not defer) when drwebd return
PG> "read error" (drwebdc says "Results: daemon return code 0x1 (read error)").


Here's proposed patch:

--- malware.c.orig    2004-09-06 17:38:02.000000000 +0300
+++ malware.c    2004-09-07 14:11:45.949867405 +0300
@@ -26,4 +26,9 @@
 #define DRWEBD_IS_MAIL              (1<<19)  /* say to daemon that format is "archive MAIL" */


+#define DERR_READ_ERR               (1<<0)   /* read error */
+#define DERR_NOMEMORY               (1<<2)   /* no memory */
+#define DERR_TIMEOUT                (1<<9)   /* scan timeout has run out */
+#define DERR_BAD_CALL               (1<<15)  /* wrong command */
+
 /* Routine to check whether a system is big- or litte-endian. 
    Ripped from http://www.faqs.org/faqs/graphics/fileformats-faq/part4/section-7.html
@@ -369,4 +374,20 @@
           }
           else {
+            char *drweb_s = NULL;
+
+            if (drweb_rc & DERR_READ_ERR) drweb_s = "read error";
+            if (drweb_rc & DERR_NOMEMORY) drweb_s = "no memory";
+            if (drweb_rc & DERR_TIMEOUT)  drweb_s = "timeout";
+            if (drweb_rc & DERR_BAD_CALL) drweb_s = "wrong command";
+            /* retcodes DERR_SYMLINK, DERR_NO_REGFILE, DERR_SKIPPED.
+             * DERR_TOO_BIG, DERR_TOO_COMPRESSED, DERR_SPAM,
+             * DERR_CRC_ERROR, DERR_READSOCKET, DERR_WRITE_ERR
+             * and others are ignored */
+            if (drweb_s) {
+                  log_write(0, LOG_MAIN|LOG_PANIC,
+                      "malware acl condition: drweb: drweb daemon retcode 0x%x (%s)", drweb_rc, drweb_s);
+                close(sock);
+                  return DEFER;
+            }
               /* no virus found */
               malware_name = NULL;


-- 
                                Lucky carrier,
                                                  Pavel.