Don't attempt to send abandon unless connection exists.

If connection doesn't exist, return LDAP_SERVER_DOWN.

libraries/libldap/abandon.c

@@ -131,12 +131,18 @@ do_abandon(
 
 	err = 0;
 	if ( sendabandon ) {
-		/* create a message to send */
-		if ( (ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
+		if( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
+			/* not connected */
+			err = -1;
+			ld->ld_errno = LDAP_SERVER_DOWN;
+
+		} else if ( (ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
+			/* BER element alocation failed */
 			err = -1;
 			ld->ld_errno = LDAP_NO_MEMORY;
 
 		} else {
+			/* create a message to send */
 			err = ber_printf( ber, "{iti",  /* '}' */
 				++ld->ld_msgid,
 			    LDAP_REQ_ABANDON, msgid );

libraries/libldap/apitest.c

@@ -188,5 +188,47 @@ main(int argc, char **argv)
 		puts("  HOST NAME:         <not set>");
 	}
 
+#if 0
+	/* API tests */
+	{	/* bindless unbind */
+		LDAP *ld;
+		int rc;
+
+		ld = ldap_init( "localhost", 389 );
+		if( ld == NULL ) {
+			perror("ldap_init");
+			return EXIT_FAILURE;
+		}
+
+		rc = ldap_unbind( ld );
+		if( rc != LDAP_SUCCESS ) {
+			perror("ldap_unbind");
+			return EXIT_FAILURE;
+		}
+	}
+	{	/* bindless unbind */
+		LDAP *ld;
+		int rc;
+
+		ld = ldap_init( "localhost", 389 );
+		if( ld == NULL ) {
+			perror("ldap_init");
+			return EXIT_FAILURE;
+		}
+
+		rc = ldap_abandon_ext( ld, 0, NULL, NULL );
+		if( rc != LDAP_SERVER_DOWN ) {
+			ldap_perror( ld, "ldap_abandon");
+			return EXIT_FAILURE;
+		}
+
+		rc = ldap_unbind( ld );
+		if( rc != LDAP_SUCCESS ) {
+			perror("ldap_unbind");
+			return EXIT_FAILURE;
+		}
+	}
+#endif
+
 	return EXIT_SUCCESS;
 }