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