added new global 'name' setting

documentation/Configuration.md

@@ -35,6 +35,12 @@ This technique, also called 'pinning', improves the determinism of the server by
 The `priority` setting allows to adjust the scheduling priority of the deamon processes.
 By default, the daemon uses a real-time optimized FIFO scheduling algorithm.
 
+#### `name` *(integer)*
+
+By default the `name` of a S2SS instance is equalt to the hostname of the machine it is running on.
+Some node types are using this name to identify themselves agains their remotes.
+An example is the `ngsi` node type which adds a metadata attribute `source` to its updates.
+
 ## Nodes
 
 The node section is a **directory** of nodes (clients) which are connected to the S2SS instance.

server/etc/example.conf

@@ -27,6 +27,9 @@ debug = 5;						# The level of verbosity for debug messages
 stats = 3;						# The interval in seconds to print path statistics.
 							# A value of 0 disables the statistics.
 
+name = "s2ss-acs"					# The name of this S2SS instance. Might by used by node-types
+							# to identify themselves (default is the hostname).
+
 
 ############    Dictionary of nodes    ############
 

server/include/config.h

@@ -65,10 +65,11 @@
 	
 /** Global configuration */
 struct settings {
-	int priority;	/**< Process priority (lower is better) */
-	int affinity;	/**< Process affinity of the server and all created threads */
-	int debug;	/**< Debug log level */
-	double stats;	/**< Interval for path statistics. Set to 0 to disable themo disable them. */
+	int priority;		/**< Process priority (lower is better) */
+	int affinity;		/**< Process affinity of the server and all created threads */
+	int debug;		/**< Debug log level */
+	double stats;		/**< Interval for path statistics. Set to 0 to disable themo disable them. */
+	const char *name;	/**< Name of the S2SS instance */
 };
 
 #endif /* _CONFIG_H_ */

server/src/cfg.c

@@ -8,6 +8,7 @@
 
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 #include "utils.h"
 #include "list.h"
@@ -87,6 +88,11 @@ int config_parse_global(config_setting_t *cfg, struct settings *set)
 	config_setting_lookup_int(cfg, "debug", &set->debug);
 	config_setting_lookup_float(cfg, "stats", &set->stats);
 
+	if (!config_setting_lookup_string(cfg, "name", &set->name)) {
+		set->name = alloc(128); /** @todo missing free */
+		gethostname((char *) set->name, 128);
+	}
+
 	log_setlevel(set->debug);
 
 	return 0;

server/src/ngsi.c

@@ -23,6 +23,8 @@
 #include "ngsi.h"
 #include "utils.h"
 
+extern struct settings settings;
+
 static json_t * json_uuid()
 {
 	char eid[37];
@@ -181,10 +183,10 @@ void ngsi_prepare_context(struct node *n, config_setting_t *mapping)
 		/* Create Metadata for attribute */
 		json_t *metadatas = json_array();
 
-		json_array_append_new(metadatas, json_pack("{ s: s, s: s, s: s }",
-			"name", "source",
-			"type", "string",
-			"value", "s2ss"
+		json_array_append_new(metadatas, json_pack("{ s: s, s: s, s: s+ }",
+			"name",  "source",
+			"type",  "string",
+			"value", "s2ss:", settings.name
 		));
 		json_array_append_new(metadatas, json_pack("{ s: s, s: s, s: i }",
 			"name", "index",