SPF: additional debug

3 files changed, 38 insertions, 16 deletions

diff --git a/src/src/lookups/spf.c b/src/src/lookups/spf.c
index ef0c791cc..c84b6bbce 100644
--- a/src/src/lookups/spf.c
+++ b/src/src/lookups/spf.c
@@ -2,19 +2,18 @@
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/*
- * Exim - SPF lookup module using libspf2
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- * Copyright (c) 2005 Chris Webb, Arachsys Internet Services Ltd
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * Copyright (c) The Exim Maintainers 2016
- */
+/* Exim - SPF lookup module using libspf2
+   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Copyright (c) 2005 Chris Webb, Arachsys Internet Services Ltd
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+Copyright (c) The Exim Maintainers 2020
+*/
 
 #include "../exim.h"
 
@@ -111,6 +110,9 @@ if (SPF_request_set_env_from(spf_request, CS keystring))
 
 SPF_request_query_mailfrom(spf_request, &spf_response);
 *result = string_copy(US SPF_strresult(SPF_response_result(spf_response)));
+
+DEBUG(D_lookup) spf_response_debug(spf_response);
+
 SPF_response_free(spf_response);
 SPF_request_free(spf_request);
 return OK;
diff --git a/src/src/spf.c b/src/src/spf.c
index a8318dcda..7671551bc 100644
--- a/src/src/spf.c
+++ b/src/src/spf.c
@@ -5,7 +5,7 @@
 /* SPF support.
    Copyright (c) Tom Kistner <tom@duncanthrax.net> 2004 - 2014
    License: GPL
-   Copyright (c) The Exim Maintainers 2015 - 2019
+   Copyright (c) The Exim Maintainers 2015 - 2020
 */
 
 /* Code for calling spf checks via libspf-alt. Called from acl.c. */
@@ -122,7 +122,8 @@ for (dns_record * rr = dns_next_rr(dnsa, &dnss, RESET_ANSWERS); rr;
 
 	if (strncmpic(rr->data+1, US SPF_VER_STR, 6) != 0)
 	  {
-	  HDEBUG(D_host_lookup) debug_printf("not an spf record\n");
+	  HDEBUG(D_host_lookup) debug_printf("not an spf record: %.*s\n",
+	    (int) s[0], s+1);
 	  continue;
 	  }
 
@@ -135,6 +136,7 @@ for (dns_record * rr = dns_next_rr(dnsa, &dnss, RESET_ANSWERS); rr;
 	  continue;
 	gstring_release_unused(g);
 	s = string_copy_malloc(string_from_gstring(g));
+	DEBUG(D_receive) debug_printf("SPF_dns_exim_lookup '%s'\n", s);
 	break;
 	}
 
@@ -147,7 +149,6 @@ for (dns_record * rr = dns_next_rr(dnsa, &dnss, RESET_ANSWERS); rr;
 	break;
 	}
       }
-    DEBUG(D_receive) debug_printf("SPF_dns_exim_lookup '%s'\n", s);
     srr.rr[found++] = (void *) s;
     }
 
@@ -283,6 +284,22 @@ return TRUE;
 }
 
 
+void
+spf_response_debug(SPF_response_t * spf_response)
+{
+if (SPF_response_messages(spf_response) == 0)
+  debug_printf(" (no errors)\n");
+else for (int i = 0; i < SPF_response_messages(spf_response); i++)
+  {
+  SPF_error_t * err = SPF_response_message(spf_response, i);
+  debug_printf( "%s_msg = (%d) %s\n",
+		  (SPF_error_errorp(err) ? "warn" : "err"),
+		  SPF_error_code(err),
+		  SPF_error_message(err));
+  }
+}
+
+
 /* spf_process adds the envelope sender address to the existing
    context (if any), retrieves the result, sets up expansion
    strings and evaluates the condition outcome.
@@ -325,6 +342,8 @@ else
   spf_smtp_comment       = US SPF_response_get_smtp_comment(spf_response);
 
   rc = SPF_response_result(spf_response);
+
+  DEBUG(D_acl) spf_response_debug(spf_response);
   }
 
 /* We got a result. Now see if we should return OK or FAIL for it */
diff --git a/src/src/spf.h b/src/src/spf.h
index 2283277df..93df24b2c 100644
--- a/src/src/spf.h
+++ b/src/src/spf.h
@@ -29,6 +29,7 @@ void spf_lib_version_report(FILE *);
 BOOL spf_init(void);
 BOOL spf_conn_init(uschar *, uschar *);
 int  spf_process(const uschar **, uschar *, int);
+void spf_response_debug(SPF_response_t *);
 
 #define SPF_PROCESS_NORMAL  0
 #define SPF_PROCESS_GUESS   1