1 files changed, 128 insertions, 0 deletions
diff --git a/lib/lwip/lwip/contrib/examples/mqtt/mqtt_example.c b/lib/lwip/lwip/contrib/examples/mqtt/mqtt_example.c
new file mode 100644
index 00000000000..bb277d6fd80
--- /dev/null
+++ b/lib/lwip/lwip/contrib/examples/mqtt/mqtt_example.c
@@ -0,0 +1,128 @@
+/*
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Dirk Ziegelmeier <dziegel@gmx.de>
+ *
+ */
+
+#include "lwip/apps/mqtt.h"
+#include "mqtt_example.h"
+
+#if LWIP_TCP
+
+/** Define this to a compile-time IP address initialization
+ * to connect anything else than IPv4 loopback
+ */
+#ifndef LWIP_MQTT_EXAMPLE_IPADDR_INIT
+#if LWIP_IPV4
+#define LWIP_MQTT_EXAMPLE_IPADDR_INIT = IPADDR4_INIT(PP_HTONL(IPADDR_LOOPBACK))
+#else
+#define LWIP_MQTT_EXAMPLE_IPADDR_INIT
+#endif
+#endif
+
+static ip_addr_t mqtt_ip LWIP_MQTT_EXAMPLE_IPADDR_INIT;
+static mqtt_client_t* mqtt_client;
+
+static const struct mqtt_connect_client_info_t mqtt_client_info =
+{
+  "test",
+  NULL, /* user */
+  NULL, /* pass */
+  100,  /* keep alive */
+  NULL, /* will_topic */
+  NULL, /* will_msg */
+  0,    /* will_qos */
+  0     /* will_retain */
+#if LWIP_ALTCP && LWIP_ALTCP_TLS
+  , NULL
+#endif
+};
+
+static void
+mqtt_incoming_data_cb(void *arg, const u8_t *data, u16_t len, u8_t flags)
+{
+  const struct mqtt_connect_client_info_t* client_info = (const struct mqtt_connect_client_info_t*)arg;
+  LWIP_UNUSED_ARG(data);
+
+  LWIP_PLATFORM_DIAG(("MQTT client \"%s\" data cb: len %d, flags %d\n", client_info->client_id,
+          (int)len, (int)flags));
+}
+
+static void
+mqtt_incoming_publish_cb(void *arg, const char *topic, u32_t tot_len)
+{
+  const struct mqtt_connect_client_info_t* client_info = (const struct mqtt_connect_client_info_t*)arg;
+
+  LWIP_PLATFORM_DIAG(("MQTT client \"%s\" publish cb: topic %s, len %d\n", client_info->client_id,
+          topic, (int)tot_len));
+}
+
+static void
+mqtt_request_cb(void *arg, err_t err)
+{
+  const struct mqtt_connect_client_info_t* client_info = (const struct mqtt_connect_client_info_t*)arg;
+
+  LWIP_PLATFORM_DIAG(("MQTT client \"%s\" request cb: err %d\n", client_info->client_id, (int)err));
+}
+
+static void
+mqtt_connection_cb(mqtt_client_t *client, void *arg, mqtt_connection_status_t status)
+{
+  const struct mqtt_connect_client_info_t* client_info = (const struct mqtt_connect_client_info_t*)arg;
+  LWIP_UNUSED_ARG(client);
+
+  LWIP_PLATFORM_DIAG(("MQTT client \"%s\" connection cb: status %d\n", client_info->client_id, (int)status));
+
+  if (status == MQTT_CONNECT_ACCEPTED) {
+    mqtt_sub_unsub(client,
+            "topic_qos1", 1,
+            mqtt_request_cb, LWIP_CONST_CAST(void*, client_info),
+            1);
+    mqtt_sub_unsub(client,
+            "topic_qos0", 0,
+            mqtt_request_cb, LWIP_CONST_CAST(void*, client_info),
+            1);
+  }
+}
+#endif /* LWIP_TCP */
+
+void
+mqtt_example_init(void)
+{
+#if LWIP_TCP
+  mqtt_client = mqtt_client_new();
+
+  mqtt_set_inpub_callback(mqtt_client,
+          mqtt_incoming_publish_cb,
+          mqtt_incoming_data_cb,
+          LWIP_CONST_CAST(void*, &mqtt_client_info));
+
+  mqtt_client_connect(mqtt_client,
+          &mqtt_ip, MQTT_PORT,
+          mqtt_connection_cb, LWIP_CONST_CAST(void*, &mqtt_client_info),
+          &mqtt_client_info);
+#endif /* LWIP_TCP */
+}