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/include/ipv4/lwip/inet_chksum.h@0:e614f7875b60, 2010-06-12 (annotated)
- Committer:
- iva2k
- Date:
- Sat Jun 12 06:01:50 2010 +0000
- Revision:
- 0:e614f7875b60
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| iva2k | 0:e614f7875b60 | 1 | /* |
| iva2k | 0:e614f7875b60 | 2 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
| iva2k | 0:e614f7875b60 | 3 | * All rights reserved. |
| iva2k | 0:e614f7875b60 | 4 | * |
| iva2k | 0:e614f7875b60 | 5 | * Redistribution and use in source and binary forms, with or without modification, |
| iva2k | 0:e614f7875b60 | 6 | * are permitted provided that the following conditions are met: |
| iva2k | 0:e614f7875b60 | 7 | * |
| iva2k | 0:e614f7875b60 | 8 | * 1. Redistributions of source code must retain the above copyright notice, |
| iva2k | 0:e614f7875b60 | 9 | * this list of conditions and the following disclaimer. |
| iva2k | 0:e614f7875b60 | 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| iva2k | 0:e614f7875b60 | 11 | * this list of conditions and the following disclaimer in the documentation |
| iva2k | 0:e614f7875b60 | 12 | * and/or other materials provided with the distribution. |
| iva2k | 0:e614f7875b60 | 13 | * 3. The name of the author may not be used to endorse or promote products |
| iva2k | 0:e614f7875b60 | 14 | * derived from this software without specific prior written permission. |
| iva2k | 0:e614f7875b60 | 15 | * |
| iva2k | 0:e614f7875b60 | 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| iva2k | 0:e614f7875b60 | 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| iva2k | 0:e614f7875b60 | 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| iva2k | 0:e614f7875b60 | 19 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| iva2k | 0:e614f7875b60 | 20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| iva2k | 0:e614f7875b60 | 21 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| iva2k | 0:e614f7875b60 | 22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| iva2k | 0:e614f7875b60 | 23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| iva2k | 0:e614f7875b60 | 24 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
| iva2k | 0:e614f7875b60 | 25 | * OF SUCH DAMAGE. |
| iva2k | 0:e614f7875b60 | 26 | * |
| iva2k | 0:e614f7875b60 | 27 | * This file is part of the lwIP TCP/IP stack. |
| iva2k | 0:e614f7875b60 | 28 | * |
| iva2k | 0:e614f7875b60 | 29 | * Author: Adam Dunkels <adam@sics.se> |
| iva2k | 0:e614f7875b60 | 30 | * |
| iva2k | 0:e614f7875b60 | 31 | */ |
| iva2k | 0:e614f7875b60 | 32 | #ifndef __LWIP_INET_CHKSUM_H__ |
| iva2k | 0:e614f7875b60 | 33 | #define __LWIP_INET_CHKSUM_H__ |
| iva2k | 0:e614f7875b60 | 34 | |
| iva2k | 0:e614f7875b60 | 35 | #include "lwip/opt.h" |
| iva2k | 0:e614f7875b60 | 36 | |
| iva2k | 0:e614f7875b60 | 37 | #include "lwip/pbuf.h" |
| iva2k | 0:e614f7875b60 | 38 | #include "lwip/ip_addr.h" |
| iva2k | 0:e614f7875b60 | 39 | |
| iva2k | 0:e614f7875b60 | 40 | /** Swap the bytes in an u16_t: much like htons() for little-endian */ |
| iva2k | 0:e614f7875b60 | 41 | #ifndef SWAP_BYTES_IN_WORD |
| iva2k | 0:e614f7875b60 | 42 | #if LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN) |
| iva2k | 0:e614f7875b60 | 43 | /* little endian and PLATFORM_BYTESWAP defined */ |
| iva2k | 0:e614f7875b60 | 44 | #define SWAP_BYTES_IN_WORD(w) LWIP_PLATFORM_HTONS(w) |
| iva2k | 0:e614f7875b60 | 45 | #else /* LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN) */ |
| iva2k | 0:e614f7875b60 | 46 | /* can't use htons on big endian (or PLATFORM_BYTESWAP not defined)... */ |
| iva2k | 0:e614f7875b60 | 47 | #define SWAP_BYTES_IN_WORD(w) (((w) & 0xff) << 8) | (((w) & 0xff00) >> 8) |
| iva2k | 0:e614f7875b60 | 48 | #endif /* LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN)*/ |
| iva2k | 0:e614f7875b60 | 49 | #endif /* SWAP_BYTES_IN_WORD */ |
| iva2k | 0:e614f7875b60 | 50 | |
| iva2k | 0:e614f7875b60 | 51 | /** Split an u32_t in two u16_ts and add them up */ |
| iva2k | 0:e614f7875b60 | 52 | #ifndef FOLD_U32T |
| iva2k | 0:e614f7875b60 | 53 | #define FOLD_U32T(u) (((u) >> 16) + ((u) & 0x0000ffffUL)) |
| iva2k | 0:e614f7875b60 | 54 | #endif |
| iva2k | 0:e614f7875b60 | 55 | |
| iva2k | 0:e614f7875b60 | 56 | #if LWIP_CHECKSUM_ON_COPY |
| iva2k | 0:e614f7875b60 | 57 | /** Function-like macro: same as MEMCPY but returns the checksum of copied data |
| iva2k | 0:e614f7875b60 | 58 | as u16_t */ |
| iva2k | 0:e614f7875b60 | 59 | #ifndef LWIP_CHKSUM_COPY |
| iva2k | 0:e614f7875b60 | 60 | #define LWIP_CHKSUM_COPY(dst, src, len) lwip_chksum_copy(dst, src, len) |
| iva2k | 0:e614f7875b60 | 61 | #ifndef LWIP_CHKSUM_COPY_ALGORITHM |
| iva2k | 0:e614f7875b60 | 62 | #define LWIP_CHKSUM_COPY_ALGORITHM 1 |
| iva2k | 0:e614f7875b60 | 63 | #endif /* LWIP_CHKSUM_COPY_ALGORITHM */ |
| iva2k | 0:e614f7875b60 | 64 | #endif /* LWIP_CHKSUM_COPY */ |
| iva2k | 0:e614f7875b60 | 65 | #else /* LWIP_CHECKSUM_ON_COPY */ |
| iva2k | 0:e614f7875b60 | 66 | #define LWIP_CHKSUM_COPY_ALGORITHM 0 |
| iva2k | 0:e614f7875b60 | 67 | #endif /* LWIP_CHECKSUM_ON_COPY */ |
| iva2k | 0:e614f7875b60 | 68 | |
| iva2k | 0:e614f7875b60 | 69 | #ifdef __cplusplus |
| iva2k | 0:e614f7875b60 | 70 | extern "C" { |
| iva2k | 0:e614f7875b60 | 71 | #endif |
| iva2k | 0:e614f7875b60 | 72 | |
| iva2k | 0:e614f7875b60 | 73 | u16_t inet_chksum(void *dataptr, u16_t len); |
| iva2k | 0:e614f7875b60 | 74 | u16_t inet_chksum_pbuf(struct pbuf *p); |
| iva2k | 0:e614f7875b60 | 75 | u16_t inet_chksum_pseudo(struct pbuf *p, |
| iva2k | 0:e614f7875b60 | 76 | ip_addr_t *src, ip_addr_t *dest, |
| iva2k | 0:e614f7875b60 | 77 | u8_t proto, u16_t proto_len); |
| iva2k | 0:e614f7875b60 | 78 | u16_t inet_chksum_pseudo_partial(struct pbuf *p, |
| iva2k | 0:e614f7875b60 | 79 | ip_addr_t *src, ip_addr_t *dest, |
| iva2k | 0:e614f7875b60 | 80 | u8_t proto, u16_t proto_len, u16_t chksum_len); |
| iva2k | 0:e614f7875b60 | 81 | #if LWIP_CHKSUM_COPY_ALGORITHM |
| iva2k | 0:e614f7875b60 | 82 | u16_t lwip_chksum_copy(void *dst, const void *src, u16_t len); |
| iva2k | 0:e614f7875b60 | 83 | #endif /* LWIP_CHKSUM_COPY_ALGORITHM */ |
| iva2k | 0:e614f7875b60 | 84 | |
| iva2k | 0:e614f7875b60 | 85 | #ifdef __cplusplus |
| iva2k | 0:e614f7875b60 | 86 | } |
| iva2k | 0:e614f7875b60 | 87 | #endif |
| iva2k | 0:e614f7875b60 | 88 | |
| iva2k | 0:e614f7875b60 | 89 | #endif /* __LWIP_INET_H__ */ |
| iva2k | 0:e614f7875b60 | 90 |