From 2be8012abe9f2e706593fba960d377ab46cd4a3c Mon Sep 17 00:00:00 2001
From: Perry Werneck <perry.werneck@gmail.com>
Date: Wed, 26 Dec 2018 09:57:12 -0200
Subject: [PATCH] + Adding "set_luname" method.

---
 src/include/lib3270.h |  4 +++-
 src/lib3270/host.c    | 13 ++++++++++---
 src/lib3270/private.h |  4 ++++
 src/lib3270/session.c | 19 +++++++++++++++++++
 4 files changed, 36 insertions(+), 4 deletions(-)

diff --git a/src/include/lib3270.h b/src/include/lib3270.h
index 4657a8a..3c8617c 100644
--- a/src/include/lib3270.h
+++ b/src/include/lib3270.h
@@ -862,7 +862,9 @@
 	 * @return conected LU name or NULL if not connected.
 	 *
 	 */
-	LIB3270_EXPORT const char		* lib3270_get_luname(H3270 *h);
+	LIB3270_EXPORT const char		* lib3270_get_luname(H3270 *hSession);
+
+	LIB3270_EXPORT int lib3270_set_luname(H3270 *hSession, const char *luname);
 
 	LIB3270_EXPORT int lib3270_has_active_script(H3270 *h);
 	LIB3270_EXPORT int lib3270_get_typeahead(H3270 *h);
diff --git a/src/lib3270/host.c b/src/lib3270/host.c
index 219d94f..29d3b06 100644
--- a/src/lib3270/host.c
+++ b/src/lib3270/host.c
@@ -238,9 +238,16 @@ LIB3270_EXPORT const char * lib3270_get_url(H3270 *hSession)
 	return hSession->host.full;
 }
 
+LIB3270_EXPORT int lib3270_set_luname(H3270 *hSession, const char *luname)
+{
+    FAIL_IF_ONLINE(hSession);
+	strncpy(hSession->luname,luname,LIB3270_LUNAME_LENGTH);
+	return 0;
+}
+
 LIB3270_EXPORT int lib3270_set_url(H3270 *h, const char *n)
 {
-    CHECK_SESSION_HANDLE(h);
+    FAIL_IF_ONLINE(h);
 
 	if(n && n != h->host.full)
 	{
@@ -326,14 +333,14 @@ LIB3270_EXPORT int lib3270_set_url(H3270 *h, const char *n)
 
 					if(!(strcasecmp(var,"lu") && strcasecmp(var,"luname")))
 					{
-						strncpy(h->luname,val,LIB3270_LUNAME_LENGTH);
+						lib3270_set_luname(h, val);
+						// strncpy(h->luname,val,LIB3270_LUNAME_LENGTH);
 					}
 					else
 					{
 						lib3270_write_log(h,"","Ignoring invalid URL attribute \"%s\"",var);
 					}
 
-
 				}
 
 			}
diff --git a/src/lib3270/private.h b/src/lib3270/private.h
index 8d88b43..5a120b6 100644
--- a/src/lib3270/private.h
+++ b/src/lib3270/private.h
@@ -637,10 +637,14 @@ LIB3270_INTERNAL int	lib3270_default_event_dispatcher(H3270 *hSession, int block
 #endif // DEBUG
 
 LIB3270_INTERNAL int check_online_session(H3270 *hSession);
+LIB3270_INTERNAL int check_offline_session(H3270 *hSession);
 
 /// @brief Returns -1 if the session is invalid or not online (sets errno).
 #define FAIL_IF_NOT_ONLINE(x) if(check_online_session(x)) return -1;
 
+/// @brief Returns -1 if the session is invalid or online (sets errno).
+#define FAIL_IF_ONLINE(x) if(check_offline_session(x)) return -1;
+
 LIB3270_INTERNAL int	non_blocking(H3270 *session, Boolean on);
 
 #if defined(HAVE_LIBSSL) /*[*/
diff --git a/src/lib3270/session.c b/src/lib3270/session.c
index cb245d1..1cfc42f 100644
--- a/src/lib3270/session.c
+++ b/src/lib3270/session.c
@@ -408,6 +408,25 @@ LIB3270_INTERNAL int check_online_session(H3270 *hSession) {
 	return 0;
 }
 
+LIB3270_INTERNAL int check_offline_session(H3270 *hSession) {
+
+	// Is the session valid?
+	if(!hSession)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+
+	// Is it connected?
+	if((int) hSession->cstate >= (int)LIB3270_CONNECTED_INITIAL)
+	{
+		errno = EBUSY;
+		return -1;
+	}
+
+	return 0;
+}
+
 LIB3270_EXPORT H3270 * lib3270_get_default_session_handle(void)
 {
 	if(default_session)
--
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