From 0f6bc01dfb06a5a1e7a591ed9aa071b05fc1a71a Mon Sep 17 00:00:00 2001
From: "Jean-Marc Pigeon (Delson)" <jmp@safe.ca>
Date: Wed, 14 Aug 2024 10:09:52 -0400
Subject: [PATCH] Starting main test program chkdns

---
 app/chkdns.c | 23 ++++++++++++++++++++-
 lib/subrou.c |  2 +-
 lib/unidns.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 lib/unidns.h | 16 +++++++++++++++
 4 files changed, 96 insertions(+), 2 deletions(-)

diff --git a/app/chkdns.c b/app/chkdns.c
index 16d349d..375963d 100644
--- a/app/chkdns.c
+++ b/app/chkdns.c
@@ -1,11 +1,13 @@
 // vim: smarttab tabstop=8 shiftwidth=2 expandtab
 /********************************************************/
 /*							*/
-/*	Main SMTP Daemon                                */
+/*	Validation program to check SPF extraction      */
+/*      library.                                        */
 /*							*/
 /********************************************************/
 #include	<stdio.h>
 #include	<stdlib.h>
+#include	<string.h>
 #include	<unistd.h>
 
 #include	"subrou.h"
@@ -26,20 +28,39 @@ int main(int argc,char *argv[])
 
 {
 int status;
+char *curname;
 int phase;
 _Bool proceed;
 
 status=0;
+if ((curname=strrchr(argv[0],'/'))==(char *)0)
+  curname=argv[0];
+else
+  curname++;
 phase=0;
 proceed=true;
 while (proceed==true) {
   switch (phase) {
     case 0      :       //checking parameters
+      foreground=true;
+      (void) rou_setappname(curname);
+      if (argc<2) {
+        (void) rou_alert(0,"%s need 2 arguments (domain,IP)",appname);
+        for (int i=1;i<optind;i++) 
+          (void) rou_alert(0,"\targ[%d]=<%s>",i,argv[i]);
+        phase=999;
+        }
       break;
     case 1      :       //initialising process
       (void) rou_modesubrou(true);
       break;
     case 2      :       //doing main tash
+      if (argv[1]!=(char *)0) { //always
+        SPFENU spf;
+
+        spf=dns_get_spf_status(argv[1],argv[2]);
+        (void) rou_alert(0,"%s %s ==> %s",argv[1],argv[2],dns_spfascii(spf));
+        }
       break;
     case 3      :       //doing main tash
       (void) rou_modesubrou(false);
diff --git a/lib/subrou.c b/lib/subrou.c
index 93186e7..1b53784 100644
--- a/lib/subrou.c
+++ b/lib/subrou.c
@@ -21,7 +21,7 @@
 
 //version definition 
 #define VERSION "0.4.2"
-#define RELEASE "1"
+#define RELEASE "2"
 
 //Public variables
 PUBLIC  int debug=0;            //debug level
diff --git a/lib/unidns.c b/lib/unidns.c
index 8052851..13ad64d 100644
--- a/lib/unidns.c
+++ b/lib/unidns.c
@@ -15,6 +15,63 @@
 
 static  _Bool modopen;          //module open/close status
 
+/*
+^L
+*/
+/********************************************************/
+/*                                                      */
+/*	Procedure to return the SPF status string value */
+/*                                                      */
+/********************************************************/
+PUBLIC const char *dns_spfascii(SPFENU spf)
+
+{
+static char *spfascii[]=
+        {
+        "spf_pass",
+        "spf_fail",
+        "spf_softfail",
+        "spf_neutral",
+        "spf_timeout",
+        "spf_missing",
+        "spf_unknown"
+        };
+
+const char *ascii;
+
+ascii="Unset (Bug?)";
+switch  (spf) {
+  case spf_pass         :
+  case spf_fail         :
+  case spf_softfail     :
+  case spf_neutral      :
+  case spf_timeout      :
+  case spf_missing      :
+  case spf_unknown      :
+    ascii=spfascii[spf];
+    break;
+  default       :
+    break;
+  }
+return ascii;
+}
+/*
+^L
+*/
+/********************************************************/
+/*                                                      */
+/*	Procedure to get the SPF status according a     */
+/*      domain name and and an IP.                      */
+/*                                                      */
+/********************************************************/
+PUBLIC SPFENU dns_get_spf_status(char *domain,char *peerip)
+
+{
+SPFENU spf;
+
+spf=spf_unknown;
+return spf;
+}
 /*
 ^L
 */
diff --git a/lib/unidns.h b/lib/unidns.h
index fbfdbd9..9b37cba 100644
--- a/lib/unidns.h
+++ b/lib/unidns.h
@@ -8,6 +8,22 @@
 #ifndef	UNIDNS
 #define UNIDNS
 
+typedef	enum	{
+	spf_pass,	//OK if condition apply
+	spf_fail,	//NOK if condition apply
+	spf_softfail,	//Msg origin is dubious
+	spf_neutral,	//same status as no SPF
+	spf_timeout,	//no answer within time
+	spf_missing,	//SPF not found
+	spf_unknown	//Unknown SPF directive
+	}SPFENU;
+
+//procedure to return spf status as an ASCII string
+extern const char *dns_spfascii(SPFENU spf);
+
+//get the SPF status for a specific domain and a remote peer IP
+extern SPFENU dns_get_spf_status(char *domain,char *peerip);
+
 //homework to be done before starting/stopping module.
 extern int dns_modeunidns(_Bool mode);
 
-- 
2.47.3