Revert sessionid code to merge master sessionid code

src/stratifier.c

@@ -281,11 +281,6 @@ struct stratum_instance {
 	proxy_t *proxy; /* Proxy this is bound to in proxy mode */
 	int proxyid; /* Which proxy id  */
 	int subproxyid; /* Which subproxy */
-
-	/* What session id we gave this instance to recognise users as they
-	 * reconnect before they've sent their auth information if possible in
-	 * proxy mode instead of supporting stratum resume with it. */
-	int64_t session_id;
 };
 
 struct share {
@@ -336,19 +331,10 @@ struct proxy_base {
 	int subproxy_count; /* Number of subproxies */
 	proxy_t *parent; /* Parent proxy of each subproxy */
 	proxy_t *subproxies; /* Hashlist of subproxies sorted by subid */
-	sdata_t *sdata; /* Unique stratifier data for each subproxy */
+	sdata_t *sdata; /* Unique stratifer data for each subproxy */
 	bool dead;
 };
 
-typedef struct user_sessionid user_sessionid_t;
-
-struct user_sessionid {
-	UT_hash_handle hh;
-	int64_t session_id;
-	user_instance_t *user;
-	time_t added;
-};
-
 struct stratifier_data {
 	ckpool_t *ckp;
 
@@ -388,7 +374,6 @@ struct stratifier_data {
 	ckmsgq_t *stxnq;	// Transaction requests
 
 	int64_t user_instance_id;
-	int64_t session_id;
 
 	/* Stratum_instances hashlist is stored by id, whereas disconnected_instances
 	 * is sorted by enonce1_64. */
@@ -423,7 +408,6 @@ struct stratifier_data {
 	proxy_t *proxies; /* Hashlist of all proxies */
 	mutex_t proxy_lock; /* Protects all proxy data */
 	proxy_t *subproxy; /* Which subproxy this sdata belongs to in proxy mode */
-	user_sessionid_t *user_sessionids;
 };
 
 typedef struct json_entry json_entry_t;
@@ -2778,7 +2762,7 @@ static proxy_t *__best_subproxy(proxy_t *proxy)
  * in proxy mode where we find a subproxy based on the current proxy with room
  * for more clients. Signal the generator to recruit more subproxies if we are
  * running out of room. */
-static sdata_t *select_sdata(const ckpool_t *ckp, sdata_t *ckp_sdata, int userid)
+static sdata_t *select_sdata(const ckpool_t *ckp, sdata_t *ckp_sdata)
 {
 	proxy_t *current, *proxy, *tmp, *best = NULL;
 
@@ -2794,9 +2778,10 @@ static sdata_t *select_sdata(const ckpool_t *ckp, sdata_t *ckp_sdata, int userid
 	 * priority */
 	mutex_lock(&ckp_sdata->proxy_lock);
 	HASH_ITER(hh, ckp_sdata->proxies, proxy, tmp) {
-		if (proxy->userid < userid)
+		/* FIXME: We need to check the user bound proxies though we
-			continue;
+		 * currently only know users after they've authorised which is
-		if (proxy->userid > userid)
+		 * too late for this. */
+		if (!proxy->global)
 			break;
 		best = __best_subproxy(proxy);
 		if (best)
@@ -2805,35 +2790,14 @@ static sdata_t *select_sdata(const ckpool_t *ckp, sdata_t *ckp_sdata, int userid
 	mutex_unlock(&ckp_sdata->proxy_lock);
 
 	if (!best) {
-		if (!userid)
 		LOGWARNING("Temporarily insufficient subproxies to accept more clients");
 		return NULL;
 	}
-	if (!userid && (best->id != current->id || current->headroom < 2))
+	if (best->id != current->id || current->headroom < 2)
 		generator_recruit(ckp, 1);
 	return best->sdata;
 }
 
-static user_instance_t *user_from_sessionid(sdata_t *sdata, const int64_t session_id)
-{
-	user_sessionid_t *user_sessionid;
-	user_instance_t *user = NULL;
-
-	ck_wlock(&sdata->instance_lock);
-	HASH_FIND_I64(sdata->user_sessionids, &session_id, user_sessionid);
-	if (user_sessionid)
-		HASH_DEL(sdata->user_sessionids, user_sessionid);
-	ck_wunlock(&sdata->instance_lock);
-
-	if (user_sessionid) {
-		user = user_sessionid->user;
-		LOGINFO("Found matching user %s from sessionid %lx", user->username,
-			session_id);
-		dealloc(user_sessionid);
-	}
-	return user;
-}
-
 /* Extranonce1 must be set here. Needs to be entered with client holding a ref
  * count. */
 static json_t *parse_subscribe(stratum_instance_t *client, const int64_t client_id, const json_t *params_val)
@@ -2850,12 +2814,17 @@ static json_t *parse_subscribe(stratum_instance_t *client, const int64_t client_
 		return json_string("params not an array");
 	}
 
-	sdata = select_sdata(ckp, ckp_sdata, 0);
+	sdata = select_sdata(ckp, ckp_sdata);
 	if (unlikely(!sdata || !sdata->current_workbase)) {
 		LOGWARNING("Failed to provide subscription due to no %s", sdata ? "current workbase" : "sdata");
 		stratum_send_message(ckp_sdata, client, "Pool Initialising");
 		return json_string("Initialising");
 	}
+	if (ckp->proxy) {
+		LOGINFO("Current %d, selecting proxy %d:%d for client %"PRId64, ckp_sdata->proxy->id,
+			sdata->subproxy->id, sdata->subproxy->subid, client->id);
+	}
+	client->sdata = sdata;
 
 	arr_size = json_array_size(params_val);
 	/* NOTE useragent is NULL prior to this so should not be used in code
@@ -2868,13 +2837,12 @@ static json_t *parse_subscribe(stratum_instance_t *client, const int64_t client_
 			client->useragent = strdup(buf);
 		else
 			client->useragent = ckzalloc(1); // Set to ""
-		buf = NULL;
+		if (arr_size > 1 && !ckp->proxy) {
-		if (arr_size > 1) {
-			buf = json_string_value(json_array_get(params_val, 1));
-			LOGDEBUG("Found old session id %s", buf);
-			if (!ckp->proxy) {
 			/* This would be the session id for reconnect, it will
 			 * not work for clients on a proxied connection. */
+			buf = json_string_value(json_array_get(params_val, 1));
+			LOGDEBUG("Found old session id %s", buf);
+			/* Add matching here */
 			if ((client->enonce1_64 = disconnected_sessionid_exists(sdata, buf, client_id))) {
 				sprintf(client->enonce1, "%016lx", client->enonce1_64);
 				old_match = true;
@@ -2883,26 +2851,9 @@ static json_t *parse_subscribe(stratum_instance_t *client, const int64_t client_
 				__fill_enonce1data(sdata->current_workbase, client);
 				ck_runlock(&sdata->workbase_lock);
 			}
-			} else {
-				int64_t session_id = 0;
-
-				sscanf(buf, "%lx", &session_id);
-				client->user_instance = user_from_sessionid(ckp_sdata, session_id);
-				if (client->user_instance) {
-					sdata_t *usdata = select_sdata(ckp, ckp_sdata, client->user_instance->id);
-
-					if (usdata)
-						sdata = usdata;
-				}
-			}
 		}
 	} else
 		client->useragent = ckzalloc(1);
-	client->sdata = sdata;
-	if (ckp->proxy) {
-		LOGINFO("Current %d, selecting proxy %d:%d for client %"PRId64, ckp_sdata->proxy->id,
-			sdata->subproxy->id, sdata->subproxy->subid, client->id);
-	}
 	if (!old_match) {
 		/* Create a new extranonce1 based on a uint64_t pointer */
 		if (!new_enonce1(ckp, ckp_sdata, sdata, client)) {
@@ -2923,17 +2874,13 @@ static json_t *parse_subscribe(stratum_instance_t *client, const int64_t client_
 	ck_runlock(&sdata->workbase_lock);
 
 	/* Send a random sessionid in proxy mode so clients don't think we have
-	 * resumed if enonce1 ends up matching on reconnect but we can use it
+	 * resumed if enonce1 ends up matching on reconnect. */
-	 * to recognise users reconnecting before they authorise. */
 	if (ckp->proxy) {
-		char sessionid[20];
+		unsigned int now = time(NULL);
+		char nowx[12];
 
-		ck_wlock(&ckp_sdata->instance_lock);
+		sprintf(nowx, "%x", now);
-		client->session_id = ckp_sdata->session_id++;
+		JSON_CPACK(ret, "[[[s,s]],s,i]", "mining.notify", nowx, client->enonce1,
-		ck_wunlock(&ckp_sdata->instance_lock);
-
-		sprintf(sessionid, "%lx", client->session_id);
-		JSON_CPACK(ret, "[[[s,s]],s,i]", "mining.notify", sessionid, client->enonce1,
 				n2len);
 	} else {
 		JSON_CPACK(ret, "[[[s,s]],s,i]", "mining.notify", client->enonce1, client->enonce1,
@@ -3107,7 +3054,7 @@ static user_instance_t *__create_user(sdata_t *sdata, const char *username)
 
 	user->auth_backoff = DEFAULT_AUTH_BACKOFF;
 	strcpy(user->username, username);
-	user->id = ++sdata->user_instance_id;
+	user->id = sdata->user_instance_id++;
 	HASH_ADD_STR(sdata->user_instances, username, user);
 	return user;
 }
@@ -3381,20 +3328,6 @@ static void queue_delayed_auth(stratum_instance_t *client)
 	ckdbq_add(ckp, ID_AUTH, val);
 }
 
-static void add_user_sessionid(ckpool_t *ckp, int64_t session_id, user_instance_t *user)
-{
-	user_sessionid_t *user_sessionid = ckalloc(sizeof(user_sessionid_t));
-	sdata_t *sdata = ckp->data;
-
-	user_sessionid->session_id = session_id;
-	user_sessionid->user = user;
-	user_sessionid->added = time(NULL);
-
-	ck_wlock(&sdata->instance_lock);
-	HASH_ADD_I64(sdata->user_sessionids, session_id, user_sessionid);
-	ck_wunlock(&sdata->instance_lock);
-}
-
 /* Needs to be entered with client holding a ref count. */
 static json_t *parse_authorise(stratum_instance_t *client, const json_t *params_val,
 			       json_t **err_val, int *errnum)
@@ -3437,8 +3370,6 @@ static json_t *parse_authorise(stratum_instance_t *client, const json_t *params_
 		goto out;
 	}
 	user = generate_user(ckp, client, buf);
-	if (ckp->proxy)
-		add_user_sessionid(ckp, client->session_id, user);
 	client->user_id = user->id;
 	ts_realtime(&now);
 	client->start_time = now.tv_sec;
@@ -5458,8 +5389,6 @@ int stratifier(proc_instance_t *pi)
 	randomiser <<= 32;
 	if (!ckp->proxy)
 		sdata->blockchange_id = sdata->workbase_id = randomiser;
-	else
-		sdata->session_id = randomiser;
 
 	if (!ckp->serverurls) {
 		ckp->serverurl[0] = "127.0.0.1";