xref: /third_party/libcoap/examples/lwip/client.c (revision c87c5fba) 
1/*
2 * Demo for libcoap on lwIP
3 *
4 * partially copied from lwip-contrib/ports/unix/proj/minimal/main.c
5 *
6 *
7 * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without modification,
11 * are permitted provided that the following conditions are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright notice,
14 *    this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright notice,
16 *    this list of conditions and the following disclaimer in the documentation
17 *    and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
24 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
26 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
29 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
30 * OF SUCH DAMAGE.
31 *
32 * Author: Adam Dunkels <adam@sics.se>
33 * RT timer modifications by Christiaan Simons
34 * lwip adaptions: chrysn <chrysn@fsfe.org>
35 * also, https://savannah.nongnu.org/bugs/?40245 was applied */
36
37#include "client-coap.h"
38
39#include <lwip/init.h>
40#include <lwip/timeouts.h>
41
42#include <netif/etharp.h>
43#include <netif/tapif.h>
44
45#include <signal.h>
46
47#if LWIP_IPV4
48static ip4_addr_t ipaddr, netmask, gw;
49#endif /* LWIP_IPV4 */
50static int quit = 0;
51
52static void
53handle_sigint(int signum) {
54  (void)signum;
55
56  client_coap_finished();
57  printf("Client Application finished.\n");
58  exit(0);
59}
60
61/*
62 * This function is called internally by coap_io_process() to check
63 * for input.
64 */
65static int
66wait_for_input(void *arg, uint32_t milli_secs) {
67  struct netif *netif = (struct netif *)arg;
68  int ret;
69
70  (void)milli_secs;
71  ret = tapif_select(netif);
72
73  sys_check_timeouts();
74  return ret;
75}
76
77int
78main(int argc, char **argv) {
79  struct netif netif;
80#ifndef _WIN32
81  struct sigaction sa;
82#endif
83  int no_more = 0;
84
85  /* startup defaults (may be overridden by one or more opts). this is
86   * hard-coded v4 even in presence of v6, which does auto-discovery and
87   * should thus wind up with an address of fe80::12:34ff:fe56:78ab%tap0
88   * */
89#if LWIP_IPV4
90  IP4_ADDR(&gw, 192,168,114,1);
91  IP4_ADDR(&ipaddr, 192,168,114,2);
92  IP4_ADDR(&netmask, 255,255,255,0);
93#endif /* LWIP_IPV4 */
94
95  lwip_init();
96
97  printf("TCP/IP initialized.\n");
98
99#if LWIP_IPV4
100  netif_add(&netif, &ipaddr, &netmask, &gw, NULL, tapif_init, ethernet_input);
101#endif /* LWIP_IPV4 */
102  netif.flags |= NETIF_FLAG_ETHARP;
103  netif_set_default(&netif);
104  netif_set_up(&netif);
105#if LWIP_IPV6
106  netif_create_ip6_linklocal_address(&netif, 1);
107  netif_ip6_addr_set_state(&netif, 0, IP6_ADDR_PREFERRED);
108#endif
109
110  /* start applications here */
111
112#ifdef _WIN32
113  signal(SIGINT, handle_sigint);
114#else
115  memset(&sa, 0, sizeof(sa));
116  sigemptyset(&sa.sa_mask);
117  sa.sa_handler = handle_sigint;
118  sa.sa_flags = 0;
119  sigaction(SIGINT, &sa, NULL);
120  sigaction(SIGTERM, &sa, NULL);
121  /* So we do not exit on a SIGPIPE */
122  sa.sa_handler = SIG_IGN;
123  sigaction(SIGPIPE, &sa, NULL);
124#endif
125
126  client_coap_init(wait_for_input, &netif, argc, argv);
127
128  printf("Client Application started.\n");
129
130  while (!quit && !no_more) {
131    /*
132     * Poll netif, pass any read packet to lwIP
133     * Has internal timeout of 100 msec (sometimes less) based on
134     * sys_timeouts_sleeptime().
135     */
136    tapif_select(&netif);
137
138    sys_check_timeouts();
139
140    no_more = client_coap_poll();
141  }
142
143  client_coap_finished();
144  printf("Client Application finished.\n");
145  return 0;
146}
147