tidying: dkim output function args

[exim.git] / src / src / spam.c

diff --git a/src/src/spam.c b/src/src/spam.c
index 118fcfa8a76b5dcab17a3823dbc61dd6bb46d933..f46e11e42391d7005d412b42afa73a87f4db4bb5 100644 (file)
--- a/src/src/spam.c
+++ b/src/src/spam.c
@@ -2,8 +2,10 @@
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003 - 2015 */
-/* License: GPL */
+/* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003 - 2015
+ * License: GPL
+ * Copyright (c) The Exim Maintainers 2016
+ */
 
 /* Code for calling spamassassin's spamd. Called from acl.c. */
 
@@ -139,7 +141,7 @@ long rnd, weights;
 unsigned pri;
 static BOOL srandomed = FALSE;
 
-/* seedup, if we have only 1 server */
+/* speedup, if we have only 1 server */
 if (num_servers == 1)
   return (spamds[0]->is_failed ? -1 : 0);
 
@@ -367,13 +369,6 @@ start = time(NULL);
     }
   }
 
-if (spamd_sock == -1)
-  {
-  log_write(0, LOG_MAIN|LOG_PANIC,
-      "programming fault, spamd_sock unexpectedly unset");
-  goto defer;
-  }
-
 (void)fcntl(spamd_sock, F_SETFL, O_NONBLOCK);
 /* now we are connected to spamd on spamd_sock */
 if (sd->is_rspamd)
@@ -414,7 +409,7 @@ if (wrote == -1)
   {
   (void)close(spamd_sock);
   log_write(0, LOG_MAIN|LOG_PANIC,
-       "%s spamd send failed: %s", loglabel, strerror(errno));
+       "%s spamd %s send failed: %s", loglabel, callout_address, strerror(errno));
   goto defer;
   }
 
@@ -459,13 +454,13 @@ again:
       {
       if (result == -1)
        log_write(0, LOG_MAIN|LOG_PANIC,
-         "%s %s on spamd socket", loglabel, strerror(errno));
+         "%s %s on spamd %s socket", loglabel, callout_address, strerror(errno));
       else
        {
        if (time(NULL) - start < sd->timeout)
          goto again;
        log_write(0, LOG_MAIN|LOG_PANIC,
-         "%s timed out writing spamd socket", loglabel);
+         "%s timed out writing spamd %s, socket", loglabel, callout_address);
        }
       (void)close(spamd_sock);
       goto defer;
@@ -475,7 +470,7 @@ again:
     if (wrote == -1)
       {
       log_write(0, LOG_MAIN|LOG_PANIC,
-         "%s %s on spamd socket", loglabel, strerror(errno));
+         "%s %s on spamd %s socket", loglabel, callout_address, strerror(errno));
       (void)close(spamd_sock);
       goto defer;
       }
@@ -507,14 +502,15 @@ offset = 0;
 while ((i = ip_recv(spamd_sock,
                   spamd_buffer + offset,
                   sizeof(spamd_buffer) - offset - 1,
-                  sd->timeout - time(NULL) + start)) > 0 )
+                  sd->timeout - time(NULL) + start)) > 0)
   offset += i;
+spamd_buffer[offset] = '\0';   /* guard byte */
 
 /* error handling */
 if (i <= 0 && errno != 0)
   {
   log_write(0, LOG_MAIN|LOG_PANIC,
-       "%s error reading from spamd socket: %s", loglabel, strerror(errno));
+       "%s error reading from spamd %s, socket: %s", loglabel, callout_address, strerror(errno));
   (void)close(spamd_sock);
   return DEFER;
   }
@@ -525,13 +521,15 @@ if (i <= 0 && errno != 0)
 if (sd->is_rspamd)
   {                            /* rspamd variant of reply */
   int r;
-  if ((r = sscanf(CS spamd_buffer,
+  if (  (r = sscanf(CS spamd_buffer,
          "RSPAMD/%7s 0 EX_OK\r\nMetric: default; %7s %lf / %lf / %lf\r\n%n",
          spamd_version, spamd_short_result, &spamd_score, &spamd_threshold,
-         &spamd_reject_score, &spamd_report_offset)) != 5)
+         &spamd_reject_score, &spamd_report_offset)) != 5
+     || spamd_report_offset >= offset          /* verify within buffer */
+     )
     {
     log_write(0, LOG_MAIN|LOG_PANIC,
-             "%s cannot parse spamd output: %d", loglabel, r);
+             "%s cannot parse spamd %s, output: %d", loglabel, callout_address, r);
     return DEFER;
     }
   /* now parse action */
@@ -560,7 +558,7 @@ else
           spamd_version,&spamd_score,&spamd_threshold,&spamd_report_offset) != 3)
        {
        log_write(0, LOG_MAIN|LOG_PANIC,
-                 "%s cannot parse spamd output", loglabel);
+                 "%s cannot parse spamd %s output", loglabel, callout_address);
        return DEFER;
        }
     }