1 /*
2 * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
25 * OF SUCH DAMAGE.
26 *
27 * This file is part of the lwIP TCP/IP stack.
28 *
29 * Author: Adam Dunkels <adam@sics.se>
30 *
31 */
32 #include "tcpecho.h"
33
34 #include "lwip/opt.h"
35
36 #if LWIP_NETCONN
37
38 #include "lwip/sys.h"
39 #include "lwip/api.h"
40 /*-----------------------------------------------------------------------------------*/
41 static void
tcpecho_thread(void * arg)42 tcpecho_thread(void *arg)
43 {
44 struct netconn *conn, *newconn;
45 err_t err;
46 LWIP_UNUSED_ARG(arg);
47
48 /* Create a new connection identifier. */
49 /* Bind connection to well known port number 7. */
50 #if LWIP_IPV6
51 conn = netconn_new(NETCONN_TCP_IPV6);
52 netconn_bind(conn, IP6_ADDR_ANY, 7);
53 #else /* LWIP_IPV6 */
54 conn = netconn_new(NETCONN_TCP);
55 netconn_bind(conn, IP_ADDR_ANY, 7);
56 #endif /* LWIP_IPV6 */
57 LWIP_ERROR("tcpecho: invalid conn", (conn != NULL), return;);
58
59 /* Tell connection to go into listening mode. */
60 netconn_listen(conn);
61
62 while (1) {
63
64 /* Grab new connection. */
65 err = netconn_accept(conn, &newconn);
66 /*printf("accepted new connection %p\n", newconn);*/
67 /* Process the new connection. */
68 if (err == ERR_OK) {
69 struct netbuf *buf;
70 void *data;
71 u16_t len;
72
73 while ((err = netconn_recv(newconn, &buf)) == ERR_OK) {
74 /*printf("Recved\n");*/
75 do {
76 netbuf_data(buf, &data, &len);
77 err = netconn_write(newconn, data, len, NETCONN_COPY);
78 #if 0
79 if (err != ERR_OK) {
80 printf("tcpecho: netconn_write: error \"%s\"\n", lwip_strerr(err));
81 }
82 #endif
83 } while (netbuf_next(buf) >= 0);
84 netbuf_delete(buf);
85 }
86 /*printf("Got EOF, looping\n");*/
87 /* Close connection and discard connection identifier. */
88 netconn_close(newconn);
89 netconn_delete(newconn);
90 }
91 }
92 }
93 /*-----------------------------------------------------------------------------------*/
94 void
tcpecho_init(void)95 tcpecho_init(void)
96 {
97 sys_thread_new("tcpecho_thread", tcpecho_thread, NULL, DEFAULT_THREAD_STACKSIZE, DEFAULT_THREAD_PRIO);
98 }
99 /*-----------------------------------------------------------------------------------*/
100
101 #endif /* LWIP_NETCONN */
102