* Simple JSON parser and generator.

* Simple HTTP webservice with support for both receiving and sending HTTP requests. * json-ws example that optionally push sensor data to COSM over IPv6.
2012-06-02 18:24:29 +02:00 · 2012-06-02 18:24:29 +02:00 · 51b73127e9
commit 51b73127e9
parent f177284a73
19 changed files with 3028 additions and 0 deletions
--- a/examples/ipv6/json-ws/json-ws-udp.c
+++ b/examples/ipv6/json-ws/json-ws-udp.c
@ -0,0 +1,154 @@
+/*
+ * Copyright (c) 2011-2012, Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * 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. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
+ *
+ * $Id: dmacro.dm,v 1.11 2006/03/18 19:43:52 nfi Exp $
+ */
+
+/**
+ * \file
+ *         Code for sending the JSON data as a UDP packet
+ *         Specify proto = "udp", port = <server-udp-port>
+ *         host = <ipv6-server-address>
+ *
+ * \author
+ *         Niclas Finne <nfi@sics.se>
+ *         Joakim Eriksson <joakime@sics.se>
+ */
+
+#include "contiki.h"
+#include "httpd-ws.h"
+#include "jsontree.h"
+#include "jsonparse.h"
+#include "json-ws.h"
+#include <stdio.h>
+#include <string.h>
+
+#define DEBUG DEBUG_FULL
+#include "net/uip-debug.h"
+
+static struct uip_udp_conn *client_conn;
+static uip_ipaddr_t server_ipaddr;
+static uint16_t server_port;
+
+#define SENDER_PORT 8181
+
+/*---------------------------------------------------------------------------*/
+int
+json_ws_udp_setup(const char *host, uint16_t port)
+{
+
+  server_port = port;
+
+  if(client_conn != NULL) {
+    /* this should be a macro uip_udp_conn_free() or something */
+    uip_udp_remove(client_conn);
+    client_conn = NULL;
+  }
+
+  uip_ipaddr_t *ipaddr;
+
+  /* First check if the host is an IP address. */
+  ipaddr = &server_ipaddr;
+  if(uiplib_ipaddrconv(host, &server_ipaddr) == 0) {
+#if 0 && UIP_UDP
+    ipaddr = resolv_lookup(host);
+
+    if(ipaddr == NULL) {
+      return 0;
+    }
+#else /* UIP_UDP */
+    return 0;
+#endif /* UIP_UDP */
+  }
+
+  /* new connection with remote host */
+  client_conn = udp_new(&server_ipaddr, UIP_HTONS(server_port), NULL);
+  udp_bind(client_conn, UIP_HTONS(SENDER_PORT));
+
+  PRINTF("Created a connection with the server ");
+  PRINT6ADDR(&client_conn->ripaddr);
+  PRINTF(" local/remote port %u/%u\n",
+         UIP_HTONS(client_conn->lport), UIP_HTONS(client_conn->rport));
+  return 1;
+}
+
+/*---------------------------------------------------------------------------*/
+
+static char *udp_buf;
+static int pos;
+static int size;
+
+static int
+putchar_udp(int c)
+{
+  if(udp_buf != NULL && pos <= size) {
+    udp_buf[pos++] = c;
+    return c;
+  }
+  return 0;
+}
+
+/*---------------------------------------------------------------------------*/
+void
+json_ws_udp_send(struct jsontree_value *tree, const char *path)
+{
+  struct jsontree_context json;
+  /* maxsize = 70 bytes */
+  char buf[70];
+
+  udp_buf = buf;
+
+  /* reset state and set max-size */
+  /* NOTE: packet will be truncated at 70 bytes */
+  pos = 0;
+  size = sizeof(buf);
+
+  json.values[0] = (struct json_value *)tree;
+  jsontree_reset(&json);
+  find_json_path(&json, path);
+  json.path = json.depth;
+  json.putchar = putchar_udp;
+  while(jsontree_print_next(&json) && json.path <= json.depth);
+
+  printf("Real UDP size: %d\n", pos);
+  buf[pos] = 0;
+
+  uip_udp_packet_sendto(client_conn, &buf, pos,
+                        &server_ipaddr, UIP_HTONS(server_port));
+}
+/*---------------------------------------------------------------------------*/
+void
+json_ws_udp_debug(char *string)
+{
+  int len;
+
+  len = strlen(string);
+  uip_udp_packet_sendto(client_conn, string, len,
+                        &server_ipaddr, UIP_HTONS(server_port));
+}
+/*---------------------------------------------------------------------------*/