xrdp: add OpenSSL version to --version

While here, cleanup --help,  --version, and when unknown option.

common/ssl_calls.c

@@ -33,6 +33,7 @@
 #include <openssl/bn.h>
 #include <openssl/rsa.h>
 #include <openssl/dh.h>
+#include <openssl/crypto.h>
 
 #include "os_calls.h"
 #include "arch.h"
@@ -78,7 +79,7 @@ DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g)
         return 0;
     }
 
-    if (p != NULL) 
+    if (p != NULL)
     {
         BN_free(dh->p);
         dh->p = p;
@@ -1064,3 +1065,15 @@ ssl_get_protocols_from_string(const char *str, long *ssl_protocols)
     return rv;
 }
 
+/*****************************************************************************/
+const char
+*get_openssl_version()
+{
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+    return SSLeay_version(SSLEAY_VERSION);
+#else
+    return OpenSSL_version(OPENSSL_VERSION);
+#endif
+
+}
+

common/ssl_calls.h

@@ -114,5 +114,7 @@ const char *
 ssl_get_cipher_name(const struct ssl_st *ssl);
 int
 ssl_get_protocols_from_string(const char *str, long *ssl_protocols);
+const char *
+get_openssl_version();
 
 #endif

xrdp/xrdp.c

@@ -45,6 +45,31 @@ static long g_sync_param1 = 0;
 static long g_sync_param2 = 0;
 static long (*g_sync_func)(long param1, long param2);
 
+/*****************************************************************************/
+void
+print_version(void)
+{
+    g_writeln("xrdp %s", PACKAGE_VERSION);
+    g_writeln("  A Remote Desktop Protocol Server.");
+    g_writeln("  Copyright (C) 2004-2018 Jay Sorg, "
+                "Neutrino Labs, and all contributors.");
+    g_writeln("  See https://github.com/neutrinolabs/xrdp for more information.");
+    g_writeln("%s", "");
+    g_writeln("  Compiled with %s", get_openssl_version());
+}
+
+/*****************************************************************************/
+void
+print_help(void)
+{
+    g_writeln("Usage: xrdp [options]");
+    g_writeln("   -h, --help       show help");
+    g_writeln("   -n, --nodaemon   don't fork into background");
+    g_writeln("   -k, --kill       shut down xrdp");
+    g_writeln("   -p, --port       tcp listen port");
+    g_writeln("   -f, --fork       fork on new connection");
+}
+
 /*****************************************************************************/
 /* This function is used to run a function from the main thread.
    Sync_func is the function pointer that will run from main thread
@@ -393,9 +418,12 @@ main(int argc, char **argv)
 
     if (xrdp_process_params(argc, argv, startup_params) != 0)
     {
-        g_writeln("Unknown Parameter");
-        g_writeln("xrdp -h for help");
+        print_version();
+        g_writeln("%s", "");
+        print_help();
         g_writeln("%s", "");
+
+        g_writeln("Unknown option");
         g_deinit();
         g_exit(1);
     }
@@ -405,30 +433,17 @@ main(int argc, char **argv)
 
     if (startup_params->help)
     {
+        print_version();
         g_writeln("%s", "");
-        g_writeln("xrdp: A Remote Desktop Protocol server.");
-        g_writeln("Copyright (C) Jay Sorg 2004-2014");
-        g_writeln("See http://www.xrdp.org for more information.");
-        g_writeln("%s", "");
-        g_writeln("Usage: xrdp [options]");
-        g_writeln("   -h, --help       show help");
-        g_writeln("   -n, --nodaemon   don't fork into background");
-        g_writeln("   -k, --kill       shut down xrdp");
-        g_writeln("   -p, --port       tcp listen port");
-        g_writeln("   -f, --fork       fork on new connection");
-        g_writeln("%s", "");
+        print_help();
+
         g_deinit();
         g_exit(0);
     }
 
     if (startup_params->version)
     {
-        g_writeln("%s", "");
-        g_writeln("xrdp: A Remote Desktop Protocol server.");
-        g_writeln("Copyright (C) Jay Sorg 2004-2014");
-        g_writeln("See http://www.xrdp.org for more information.");
-        g_writeln("Version %s", PACKAGE_VERSION);
-        g_writeln("%s", "");
+        print_version();
         g_deinit();
         g_exit(0);
     }

xrdp/xrdp.h

@@ -49,6 +49,10 @@ tbus
 g_get_sync_event(void);
 void
 g_process_waiting_function(void);
+void
+print_version(void);
+void
+print_help(void);
 
 /* xrdp_cache.c */
 struct xrdp_cache*