ctdb-tests: Add interactive test for tunnels

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>

Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Tue Oct 10 15:50:04 CEST 2017 on sn-devel-144

2 files changed, 200 insertions, 0 deletions

diff --git a/ctdb/tests/src/tunnel_cmd.c b/ctdb/tests/src/tunnel_cmd.c
new file mode 100644
index 00000000000..73a22978425
--- /dev/null
+++ b/ctdb/tests/src/tunnel_cmd.c
@@ -0,0 +1,199 @@
+/*
+   CTDB tunnel test
+
+   Copyright (C) Amitay Isaacs  2017
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "replace.h"
+#include "system/network.h"
+
+#include <talloc.h>
+#include <tevent.h>
+
+#include "lib/util/tevent_unix.h"
+
+#include "protocol/protocol_private.h"
+#include "client/client.h"
+
+#define TUNNEL_ID	(CTDB_TUNNEL_TEST | 0xf0f0f0f0)
+
+struct listen_state {
+	TALLOC_CTX *mem_ctx;
+	bool done;
+};
+
+static void listen_callback(struct ctdb_tunnel_context *tctx,
+			    uint32_t srcnode, uint32_t reqid,
+			    uint8_t *buf, size_t buflen,
+			    void *private_data)
+{
+	struct listen_state *state = (struct listen_state *)private_data;
+	const char *msg;
+	size_t np;
+	int ret;
+
+	ret = ctdb_stringn_pull(buf, buflen, state->mem_ctx, &msg, &np);
+	if (ret != 0) {
+		fprintf(stderr, "Invalid tunnel message, ret=%d\n", ret);
+		return;
+	}
+
+	fprintf(stderr, "%u: %s\n", srcnode, msg);
+
+	if (strcmp(msg, "quit") == 0) {
+		state->done = true;
+	}
+
+	talloc_free(discard_const(msg));
+}
+
+static int cmd_listen(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
+		      struct ctdb_client_context *client)
+{
+	struct ctdb_tunnel_context *tunnel;
+	struct listen_state state;
+	int ret;
+
+	state.mem_ctx = mem_ctx;
+	state.done = false;
+
+	ret = ctdb_tunnel_setup(mem_ctx, ev, client, TUNNEL_ID,
+				listen_callback, &state, &tunnel);
+	if (ret != 0) {
+		return ret;
+	}
+
+	ctdb_client_wait(ev, &state.done);
+
+	ret = ctdb_tunnel_destroy(ev, tunnel);
+	if (ret != 0) {
+		return ret;
+	}
+
+	return 0;
+}
+
+static void send_callback(struct ctdb_tunnel_context *tctx,
+			  uint32_t srcnode, uint32_t reqid,
+			  uint8_t *buf, size_t buflen, void *private_data)
+{
+	fprintf(stderr, "send received a message - %u: %zu\n", srcnode, buflen);
+}
+
+static int cmd_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
+		    struct ctdb_client_context *client,
+		    uint32_t destnode, const char *msg)
+{
+	struct ctdb_tunnel_context *tunnel;
+	uint8_t *buf;
+	size_t buflen, np;
+	int ret;
+
+	ret = ctdb_tunnel_setup(mem_ctx, ev, client, TUNNEL_ID,
+				send_callback, NULL, &tunnel);
+	if (ret != 0) {
+		return ret;
+	}
+
+	buflen = ctdb_stringn_len(&msg);
+	buf = talloc_size(mem_ctx, buflen);
+	if (buf == NULL) {
+		return ENOMEM;
+	}
+	ctdb_stringn_push(&msg, buf, &np);
+
+	ret = ctdb_tunnel_request(mem_ctx, ev, tunnel, destnode,
+				  tevent_timeval_zero(), buf, buflen, false);
+	if (ret != 0) {
+		return ret;
+	}
+
+	ret = ctdb_tunnel_destroy(ev, tunnel);
+	if (ret != 0) {
+		return ret;
+	}
+
+	return 0;
+}
+
+static void usage(const char *cmd)
+{
+	fprintf(stderr, "usage: %s <ctdb-socket> listen\n", cmd);
+	fprintf(stderr, "usage: %s <ctdb-socket> send <pnn> <msg>\n", cmd);
+}
+
+int main(int argc, const char **argv)
+{
+	TALLOC_CTX *mem_ctx;
+	struct tevent_context *ev;
+	struct ctdb_client_context *client;
+	const char *socket = NULL, *msg = NULL;
+	uint32_t pnn = CTDB_UNKNOWN_PNN;
+	int ret;
+	bool do_listen = false;
+	bool do_send = false;
+
+	if (argc != 3 && argc != 5) {
+		usage(argv[0]);
+		exit(1);
+	}
+
+	socket = argv[1];
+
+	if (strcmp(argv[2], "listen") == 0) {
+		do_listen = true;
+	} else if (strcmp(argv[2], "send") == 0) {
+		if (argc != 5) {
+			usage(argv[0]);
+			exit(1);
+		}
+
+		pnn = atol(argv[3]);
+		msg = argv[4];
+		do_send = true;
+	} else {
+		usage(argv[0]);
+		exit(1);
+	}
+
+	mem_ctx = talloc_new(NULL);
+	if (mem_ctx == NULL) {
+		exit(1);
+	}
+
+	ev = tevent_context_init(mem_ctx);
+	if (ev == NULL) {
+		talloc_free(mem_ctx);
+		exit(1);
+	}
+
+	ret = ctdb_client_init(mem_ctx, ev, socket, &client);
+	if (ret != 0) {
+		talloc_free(mem_ctx);
+		exit(1);
+	}
+
+	if (do_listen) {
+		ret = cmd_listen(mem_ctx, ev, client);
+	}
+	if (do_send) {
+		ret = cmd_send(mem_ctx, ev, client, pnn, msg);
+	}
+
+	talloc_free(mem_ctx);
+
+	return ret;
+}
diff --git a/ctdb/wscript b/ctdb/wscript
index f6fd2cdf3dc..fdd187b7d26 100644
--- a/ctdb/wscript
+++ b/ctdb/wscript
@@ -823,6 +823,7 @@ def build(bld):
         'lock_tdb',
         'dummy_client',
         'tunnel_test',
+        'tunnel_cmd',
     ]
 
     for target in ctdb_tests: