Add single_thread_single_client example

snippets/include/netconn_server_1thread.h

@@ -0,0 +1,14 @@
+#ifndef __NETCONN_SERVER_1THREAD_H
+#define __NETCONN_SERVER_1THREAD_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void netconn_server_1thread_thread(void* arg);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

snippets/netconn_server_1thread.c

@@ -0,0 +1,77 @@
+/*
+ * Netconn server example is based on single thread
+ * and it listens for single client only on port 23
+ */
+#include "netconn_server_1thread.h"
+#include "esp/esp.h"
+
+/**
+ * \brief           Basic thread for netconn server to test connections
+ * \param[in]       arg: User argument
+ */
+void
+netconn_server_1thread_thread(void* arg) {
+    espr_t res;
+    esp_netconn_p server, client;
+    esp_pbuf_p p;
+
+    /* Create netconn for server */
+    server = esp_netconn_new(ESP_NETCONN_TYPE_TCP);
+    if (server == NULL) {
+        printf("Cannot create server netconn!\r\n");
+    }
+
+    /* Bind it to port 23 */
+    res = esp_netconn_bind(server, 23);
+    if (res != espOK) {
+        printf("Cannot bind server\r\n");
+        goto out;
+    }
+
+    /* Start listening for incoming connections with maximal 1 client */
+    res = esp_netconn_listen_with_max_conn(server, 1);
+    if (res != espOK) {
+        goto out;
+    }
+
+    /* Unlimited loop */
+    while (1) {
+        /* Accept new client */
+        res = esp_netconn_accept(server, &client);
+        if (res != espOK) {
+            break;
+        }
+        printf("New client accepted!\r\n");
+        while (1) {
+            /* Receive data */
+            res = esp_netconn_receive(client, &p);
+            if (res == espOK) {
+                printf("Data received!\r\n");
+                esp_pbuf_free(p);
+            } else {
+                printf("Netconn receive returned: %d\r\n", (int)res);
+                if (res == espCLOSED) {
+                    printf("Connection closed by client\r\n");
+                    break;
+                }
+            }
+        }
+        /* Delete client */
+        if (client != NULL) {
+            esp_netconn_delete(client);
+            client = NULL;
+        }
+    }
+    /* Delete client */
+    if (client != NULL) {
+        esp_netconn_delete(client);
+        client = NULL;
+    }
+
+out:
+    printf("Terminating netconn thread!\r\n");
+    if (server != NULL) {
+        esp_netconn_delete(server);
+    }
+    esp_sys_thread_terminate(NULL);
+}