support config dump (.otrc)

README.md

@@ -300,6 +300,7 @@ We took a number of decisions for the design of the recorder and its utilities:
 As mentioned earlier, data is stored in files, and these files are relative to `STORAGEDIR` (compiled into the programs or specified as an option). In particular, the following directory structure can exist, whereby directories are created as needed by the _recorder_:
 
 * `cards/`, optional, contains user cards which are published when either you or one of your trackers on Hosted adds a new device. This card is then stored here and used with, e.g., `ocat --last` to show a user's name and optional avatar.
+* `config/`, optional, contains the JSON of a [device configuration](http://owntracks.org/booklet/features/remoteconfig/) (`.otrc`)  which was requested remotely via a [dump command](http://owntracks.org/booklet/tech/json/#_typecmd). Note that this will contain sensitive data.
 * `ghash/`, unless disabled, reverse Geo data is collected into an LMDB database located in this directory.
 * `last/` contains the last location published by devices. E.g. Jane's last publish from her iPhone would be in `last/jjolie/iphone/jjolie-iphone.json`. The JSON payload contained therein is enhanced with the fields `user`, `device`, `topic`, and `ghash`.
 * `monitor` a file which contains a timestamp and the last received topic (see Monitoring below).

recorder.c

@@ -322,6 +322,34 @@ static void putrec(struct udata *ud, time_t now, UT_string *reltopic, UT_string
 	}
 }
 
+/*
+ * Payload contains JSON string with a configuration obtained
+ * via cmd `dump' to the device. Store it.
+ */
+
+void config_dump(struct udata *ud, UT_string *username, UT_string *device, char *payloadstring)
+{
+	static UT_string *ts = NULL;
+
+	utstring_renew(ts);
+
+	utstring_printf(ts, "%s/%s/%s/%s",
+				STORAGEDIR,
+				"config",
+				UB(username),
+				UB(device));
+	if (mkpath(UB(ts)) < 0) {
+		olog(LOG_ERR, "Cannot mkdir %s: %m", UB(ts));
+		return;
+	}
+
+	utstring_printf(ts, "/%s-%s.otrc", UB(username), UB(device));
+	if (ud->verbose) {
+		printf("Received configuration dump, storing at %s\n", UB(ts));
+	}
+	safewrite(UB(ts), payloadstring);
+}
+
 /*
  * Payload contains JSON string with an array of waypoints. Dump
  * these into a single file.
@@ -480,6 +508,7 @@ void on_message(struct mosquitto *mosq, void *userdata, const struct mosquitto_m
 			else if (!strcmp(j->string_, "transition"))	_type = T_TRANSITION;
 			else if (!strcmp(j->string_, "waypoint"))	_type = T_WAYPOINT;
 			else if (!strcmp(j->string_, "waypoints"))	_type = T_WAYPOINTS;
+			else if (!strcmp(j->string_, "dump"))		_type = T_DUMP;
 		}
 	}
 
@@ -500,6 +529,9 @@ void on_message(struct mosquitto *mosq, void *userdata, const struct mosquitto_m
 		case T_WAYPOINTS:
 			waypoints_dump(ud, username, device, m->payload);
 			goto cleanup;
+		case T_DUMP:
+			config_dump(ud, username, device, m->payload);
+			goto cleanup;
 		case T_WAYPOINT:
 		case T_TRANSITION:
 		case T_LOCATION:

storage.c

@@ -1059,6 +1059,15 @@ JsonNode *kill_datastore(char *user, char *device)
 		olog(LOG_NOTICE, "removed %s", UB(path));
 	}
 
+	/* Remove config (.otrc) */
+	utstring_renew(path);
+	utstring_printf(path, "%s/config/%s-%s.otrc", STORAGEDIR, user, device);
+	if (remove(UB(path)) == 0) {
+		olog(LOG_NOTICE, "removed %s", UB(path));
+		json_append_member(obj, "otrc", json_mkstring(UB(path)));
+	}
+
+
 	/* Remove waypoint files and containing directories */
 	utstring_renew(path);
 	utstring_printf(path, "%s/waypoints/%s/%s/*.json", STORAGEDIR, user, device);

storage.h

@@ -33,6 +33,7 @@ typedef enum {
 	T_TRANSITION,
 	T_WAYPOINT,
 	T_WAYPOINTS,
+	T_DUMP,
 } payload_type;
 
 JsonNode *lister(char *username, char *device, time_t s_lo, time_t s_hi, int reverse);