Ilya I
Example program with HTTPServer and sensor data streaming over TCPSockets, using Donatien Garnier's Net APIs and services code on top of LWIP. Files StreamServer.h and .cpp encapsulate streaming over TCPSockets. Broadcast is done by sendToAll(), and all incoming data is echoed back to the client. Echo code can be replaced with some remote control of the streaming interface. See main() that shows how to periodically send some data to all subscribed clients. To subscribe, a client should open a socket at <mbed_ip> port 123. I used few lines in TCL code to set up a quick sink for the data. HTTP files are served on port 80 concurrently to the streaming.
lwip/core/def.c@1:3ee499525aa5, 2010-06-14 (annotated)
- Committer:
- iva2k
- Date:
- Mon Jun 14 03:24:33 2010 +0000
- Revision:
- 1:3ee499525aa5
- Parent:
- 0:e614f7875b60
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| iva2k | 0:e614f7875b60 | 1 | /** |
| iva2k | 0:e614f7875b60 | 2 | * @file |
| iva2k | 0:e614f7875b60 | 3 | * Common functions used throughout the stack. |
| iva2k | 0:e614f7875b60 | 4 | * |
| iva2k | 0:e614f7875b60 | 5 | */ |
| iva2k | 0:e614f7875b60 | 6 | |
| iva2k | 0:e614f7875b60 | 7 | /* |
| iva2k | 0:e614f7875b60 | 8 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
| iva2k | 0:e614f7875b60 | 9 | * All rights reserved. |
| iva2k | 0:e614f7875b60 | 10 | * |
| iva2k | 0:e614f7875b60 | 11 | * Redistribution and use in source and binary forms, with or without modification, |
| iva2k | 0:e614f7875b60 | 12 | * are permitted provided that the following conditions are met: |
| iva2k | 0:e614f7875b60 | 13 | * |
| iva2k | 0:e614f7875b60 | 14 | * 1. Redistributions of source code must retain the above copyright notice, |
| iva2k | 0:e614f7875b60 | 15 | * this list of conditions and the following disclaimer. |
| iva2k | 0:e614f7875b60 | 16 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| iva2k | 0:e614f7875b60 | 17 | * this list of conditions and the following disclaimer in the documentation |
| iva2k | 0:e614f7875b60 | 18 | * and/or other materials provided with the distribution. |
| iva2k | 0:e614f7875b60 | 19 | * 3. The name of the author may not be used to endorse or promote products |
| iva2k | 0:e614f7875b60 | 20 | * derived from this software without specific prior written permission. |
| iva2k | 0:e614f7875b60 | 21 | * |
| iva2k | 0:e614f7875b60 | 22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| iva2k | 0:e614f7875b60 | 23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| iva2k | 0:e614f7875b60 | 24 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| iva2k | 0:e614f7875b60 | 25 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| iva2k | 0:e614f7875b60 | 26 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| iva2k | 0:e614f7875b60 | 27 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| iva2k | 0:e614f7875b60 | 28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| iva2k | 0:e614f7875b60 | 29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| iva2k | 0:e614f7875b60 | 30 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
| iva2k | 0:e614f7875b60 | 31 | * OF SUCH DAMAGE. |
| iva2k | 0:e614f7875b60 | 32 | * |
| iva2k | 0:e614f7875b60 | 33 | * This file is part of the lwIP TCP/IP stack. |
| iva2k | 0:e614f7875b60 | 34 | * |
| iva2k | 0:e614f7875b60 | 35 | * Author: Simon Goldschmidt |
| iva2k | 0:e614f7875b60 | 36 | * |
| iva2k | 0:e614f7875b60 | 37 | */ |
| iva2k | 0:e614f7875b60 | 38 | |
| iva2k | 0:e614f7875b60 | 39 | #include "lwip/opt.h" |
| iva2k | 0:e614f7875b60 | 40 | #include "lwip/def.h" |
| iva2k | 0:e614f7875b60 | 41 | |
| iva2k | 0:e614f7875b60 | 42 | /** |
| iva2k | 0:e614f7875b60 | 43 | * These are reference implementations of the byte swapping functions. |
| iva2k | 0:e614f7875b60 | 44 | * Again with the aim of being simple, correct and fully portable. |
| iva2k | 0:e614f7875b60 | 45 | * Byte swapping is the second thing you would want to optimize. You will |
| iva2k | 0:e614f7875b60 | 46 | * need to port it to your architecture and in your cc.h: |
| iva2k | 0:e614f7875b60 | 47 | * |
| iva2k | 0:e614f7875b60 | 48 | * #define LWIP_PLATFORM_BYTESWAP 1 |
| iva2k | 0:e614f7875b60 | 49 | * #define LWIP_PLATFORM_HTONS(x) <your_htons> |
| iva2k | 0:e614f7875b60 | 50 | * #define LWIP_PLATFORM_HTONL(x) <your_htonl> |
| iva2k | 0:e614f7875b60 | 51 | * |
| iva2k | 0:e614f7875b60 | 52 | * Note ntohs() and ntohl() are merely references to the htonx counterparts. |
| iva2k | 0:e614f7875b60 | 53 | */ |
| iva2k | 0:e614f7875b60 | 54 | |
| iva2k | 0:e614f7875b60 | 55 | #if (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN) |
| iva2k | 0:e614f7875b60 | 56 | |
| iva2k | 0:e614f7875b60 | 57 | /** |
| iva2k | 0:e614f7875b60 | 58 | * Convert an u16_t from host- to network byte order. |
| iva2k | 0:e614f7875b60 | 59 | * |
| iva2k | 0:e614f7875b60 | 60 | * @param n u16_t in host byte order |
| iva2k | 0:e614f7875b60 | 61 | * @return n in network byte order |
| iva2k | 0:e614f7875b60 | 62 | */ |
| iva2k | 0:e614f7875b60 | 63 | u16_t |
| iva2k | 0:e614f7875b60 | 64 | htons(u16_t n) |
| iva2k | 0:e614f7875b60 | 65 | { |
| iva2k | 0:e614f7875b60 | 66 | return ((n & 0xff) << 8) | ((n & 0xff00) >> 8); |
| iva2k | 0:e614f7875b60 | 67 | } |
| iva2k | 0:e614f7875b60 | 68 | |
| iva2k | 0:e614f7875b60 | 69 | /** |
| iva2k | 0:e614f7875b60 | 70 | * Convert an u16_t from network- to host byte order. |
| iva2k | 0:e614f7875b60 | 71 | * |
| iva2k | 0:e614f7875b60 | 72 | * @param n u16_t in network byte order |
| iva2k | 0:e614f7875b60 | 73 | * @return n in host byte order |
| iva2k | 0:e614f7875b60 | 74 | */ |
| iva2k | 0:e614f7875b60 | 75 | u16_t |
| iva2k | 0:e614f7875b60 | 76 | ntohs(u16_t n) |
| iva2k | 0:e614f7875b60 | 77 | { |
| iva2k | 0:e614f7875b60 | 78 | return htons(n); |
| iva2k | 0:e614f7875b60 | 79 | } |
| iva2k | 0:e614f7875b60 | 80 | |
| iva2k | 0:e614f7875b60 | 81 | /** |
| iva2k | 0:e614f7875b60 | 82 | * Convert an u32_t from host- to network byte order. |
| iva2k | 0:e614f7875b60 | 83 | * |
| iva2k | 0:e614f7875b60 | 84 | * @param n u32_t in host byte order |
| iva2k | 0:e614f7875b60 | 85 | * @return n in network byte order |
| iva2k | 0:e614f7875b60 | 86 | */ |
| iva2k | 0:e614f7875b60 | 87 | u32_t |
| iva2k | 0:e614f7875b60 | 88 | htonl(u32_t n) |
| iva2k | 0:e614f7875b60 | 89 | { |
| iva2k | 0:e614f7875b60 | 90 | return ((n & 0xff) << 24) | |
| iva2k | 0:e614f7875b60 | 91 | ((n & 0xff00) << 8) | |
| iva2k | 0:e614f7875b60 | 92 | ((n & 0xff0000UL) >> 8) | |
| iva2k | 0:e614f7875b60 | 93 | ((n & 0xff000000UL) >> 24); |
| iva2k | 0:e614f7875b60 | 94 | } |
| iva2k | 0:e614f7875b60 | 95 | |
| iva2k | 0:e614f7875b60 | 96 | /** |
| iva2k | 0:e614f7875b60 | 97 | * Convert an u32_t from network- to host byte order. |
| iva2k | 0:e614f7875b60 | 98 | * |
| iva2k | 0:e614f7875b60 | 99 | * @param n u32_t in network byte order |
| iva2k | 0:e614f7875b60 | 100 | * @return n in host byte order |
| iva2k | 0:e614f7875b60 | 101 | */ |
| iva2k | 0:e614f7875b60 | 102 | u32_t |
| iva2k | 0:e614f7875b60 | 103 | ntohl(u32_t n) |
| iva2k | 0:e614f7875b60 | 104 | { |
| iva2k | 0:e614f7875b60 | 105 | return htonl(n); |
| iva2k | 0:e614f7875b60 | 106 | } |
| iva2k | 0:e614f7875b60 | 107 | |
| iva2k | 0:e614f7875b60 | 108 | #endif /* (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN) */ |