UDPtest - Some quick code to use UDP-only (no TCP) with mBe…

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Some quick code to use UDP-only (no TCP) with mBed. Echos received packets and sends packets when a button is pressed

Core/lwIP/core/ipv4/inet.c@0:a548a085de55, 2010-03-14 (annotated)

Committer:: pehrhovey
Date:: Sun Mar 14 00:54:12 2010 +0000
Revision:: 0:a548a085de55

Who changed what in which revision?

User	Revision	Line number	New contents of line
pehrhovey	0:a548a085de55	1	/**
pehrhovey	0:a548a085de55	2	* @file
pehrhovey	0:a548a085de55	3	* Functions common to all TCP/IPv4 modules, such as the byte order functions.
pehrhovey	0:a548a085de55	4	*
pehrhovey	0:a548a085de55	5	*/
pehrhovey	0:a548a085de55	6
pehrhovey	0:a548a085de55	7	/*
pehrhovey	0:a548a085de55	8	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
pehrhovey	0:a548a085de55	9	* All rights reserved.
pehrhovey	0:a548a085de55	10	*
pehrhovey	0:a548a085de55	11	* Redistribution and use in source and binary forms, with or without modification,
pehrhovey	0:a548a085de55	12	* are permitted provided that the following conditions are met:
pehrhovey	0:a548a085de55	13	*
pehrhovey	0:a548a085de55	14	* 1. Redistributions of source code must retain the above copyright notice,
pehrhovey	0:a548a085de55	15	* this list of conditions and the following disclaimer.
pehrhovey	0:a548a085de55	16	* 2. Redistributions in binary form must reproduce the above copyright notice,
pehrhovey	0:a548a085de55	17	* this list of conditions and the following disclaimer in the documentation
pehrhovey	0:a548a085de55	18	* and/or other materials provided with the distribution.
pehrhovey	0:a548a085de55	19	* 3. The name of the author may not be used to endorse or promote products
pehrhovey	0:a548a085de55	20	* derived from this software without specific prior written permission.
pehrhovey	0:a548a085de55	21	*
pehrhovey	0:a548a085de55	22	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
pehrhovey	0:a548a085de55	23	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
pehrhovey	0:a548a085de55	24	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
pehrhovey	0:a548a085de55	25	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
pehrhovey	0:a548a085de55	26	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
pehrhovey	0:a548a085de55	27	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
pehrhovey	0:a548a085de55	28	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
pehrhovey	0:a548a085de55	29	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
pehrhovey	0:a548a085de55	30	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
pehrhovey	0:a548a085de55	31	* OF SUCH DAMAGE.
pehrhovey	0:a548a085de55	32	*
pehrhovey	0:a548a085de55	33	* This file is part of the lwIP TCP/IP stack.
pehrhovey	0:a548a085de55	34	*
pehrhovey	0:a548a085de55	35	* Author: Adam Dunkels <adam@sics.se>
pehrhovey	0:a548a085de55	36	*
pehrhovey	0:a548a085de55	37	*/
pehrhovey	0:a548a085de55	38
pehrhovey	0:a548a085de55	39	#include "lwip/opt.h"
pehrhovey	0:a548a085de55	40
pehrhovey	0:a548a085de55	41	#include "lwip/inet.h"
pehrhovey	0:a548a085de55	42
pehrhovey	0:a548a085de55	43	/* Here for now until needed in other places in lwIP */
pehrhovey	0:a548a085de55	44	#ifndef isprint
pehrhovey	0:a548a085de55	45	#define in_range(c, lo, up) ((u8_t)c >= lo && (u8_t)c <= up)
pehrhovey	0:a548a085de55	46	#define isprint(c) in_range(c, 0x20, 0x7f)
pehrhovey	0:a548a085de55	47	#define isdigit(c) in_range(c, '0', '9')
pehrhovey	0:a548a085de55	48	#define isxdigit(c) (isdigit(c) \|\| in_range(c, 'a', 'f') \|\| in_range(c, 'A', 'F'))
pehrhovey	0:a548a085de55	49	#define islower(c) in_range(c, 'a', 'z')
pehrhovey	0:a548a085de55	50	#define isspace(c) (c == ' ' \|\| c == '\f' \|\| c == '\n' \|\| c == '\r' \|\| c == '\t' \|\| c == '\v')
pehrhovey	0:a548a085de55	51	#endif
pehrhovey	0:a548a085de55	52
pehrhovey	0:a548a085de55	53	/**
pehrhovey	0:a548a085de55	54	* Ascii internet address interpretation routine.
pehrhovey	0:a548a085de55	55	* The value returned is in network order.
pehrhovey	0:a548a085de55	56	*
pehrhovey	0:a548a085de55	57	* @param cp IP address in ascii represenation (e.g. "127.0.0.1")
pehrhovey	0:a548a085de55	58	* @return ip address in network order
pehrhovey	0:a548a085de55	59	*/
pehrhovey	0:a548a085de55	60	u32_t
pehrhovey	0:a548a085de55	61	inet_addr(const char *cp)
pehrhovey	0:a548a085de55	62	{
pehrhovey	0:a548a085de55	63	struct in_addr val;
pehrhovey	0:a548a085de55	64
pehrhovey	0:a548a085de55	65	if (inet_aton(cp, &val)) {
pehrhovey	0:a548a085de55	66	return (val.s_addr);
pehrhovey	0:a548a085de55	67	}
pehrhovey	0:a548a085de55	68	return (INADDR_NONE);
pehrhovey	0:a548a085de55	69	}
pehrhovey	0:a548a085de55	70
pehrhovey	0:a548a085de55	71	/**
pehrhovey	0:a548a085de55	72	* Check whether "cp" is a valid ascii representation
pehrhovey	0:a548a085de55	73	* of an Internet address and convert to a binary address.
pehrhovey	0:a548a085de55	74	* Returns 1 if the address is valid, 0 if not.
pehrhovey	0:a548a085de55	75	* This replaces inet_addr, the return value from which
pehrhovey	0:a548a085de55	76	* cannot distinguish between failure and a local broadcast address.
pehrhovey	0:a548a085de55	77	*
pehrhovey	0:a548a085de55	78	* @param cp IP address in ascii represenation (e.g. "127.0.0.1")
pehrhovey	0:a548a085de55	79	* @param addr pointer to which to save the ip address in network order
pehrhovey	0:a548a085de55	80	* @return 1 if cp could be converted to addr, 0 on failure
pehrhovey	0:a548a085de55	81	*/
pehrhovey	0:a548a085de55	82	int
pehrhovey	0:a548a085de55	83	inet_aton(const char cp, struct in_addr addr)
pehrhovey	0:a548a085de55	84	{
pehrhovey	0:a548a085de55	85	u32_t val;
pehrhovey	0:a548a085de55	86	u8_t base;
pehrhovey	0:a548a085de55	87	char c;
pehrhovey	0:a548a085de55	88	u32_t parts[4];
pehrhovey	0:a548a085de55	89	u32_t *pp = parts;
pehrhovey	0:a548a085de55	90
pehrhovey	0:a548a085de55	91	c = *cp;
pehrhovey	0:a548a085de55	92	for (;;) {
pehrhovey	0:a548a085de55	93	/*
pehrhovey	0:a548a085de55	94	* Collect number up to ``.''.
pehrhovey	0:a548a085de55	95	* Values are specified as for C:
pehrhovey	0:a548a085de55	96	* 0x=hex, 0=octal, 1-9=decimal.
pehrhovey	0:a548a085de55	97	*/
pehrhovey	0:a548a085de55	98	if (!isdigit(c))
pehrhovey	0:a548a085de55	99	return (0);
pehrhovey	0:a548a085de55	100	val = 0;
pehrhovey	0:a548a085de55	101	base = 10;
pehrhovey	0:a548a085de55	102	if (c == '0') {
pehrhovey	0:a548a085de55	103	c = *++cp;
pehrhovey	0:a548a085de55	104	if (c == 'x' \|\| c == 'X') {
pehrhovey	0:a548a085de55	105	base = 16;
pehrhovey	0:a548a085de55	106	c = *++cp;
pehrhovey	0:a548a085de55	107	} else
pehrhovey	0:a548a085de55	108	base = 8;
pehrhovey	0:a548a085de55	109	}
pehrhovey	0:a548a085de55	110	for (;;) {
pehrhovey	0:a548a085de55	111	if (isdigit(c)) {
pehrhovey	0:a548a085de55	112	val = (val * base) + (int)(c - '0');
pehrhovey	0:a548a085de55	113	c = *++cp;
pehrhovey	0:a548a085de55	114	} else if (base == 16 && isxdigit(c)) {
pehrhovey	0:a548a085de55	115	val = (val << 4) \| (int)(c + 10 - (islower(c) ? 'a' : 'A'));
pehrhovey	0:a548a085de55	116	c = *++cp;
pehrhovey	0:a548a085de55	117	} else
pehrhovey	0:a548a085de55	118	break;
pehrhovey	0:a548a085de55	119	}
pehrhovey	0:a548a085de55	120	if (c == '.') {
pehrhovey	0:a548a085de55	121	/*
pehrhovey	0:a548a085de55	122	* Internet format:
pehrhovey	0:a548a085de55	123	* a.b.c.d
pehrhovey	0:a548a085de55	124	* a.b.c (with c treated as 16 bits)
pehrhovey	0:a548a085de55	125	* a.b (with b treated as 24 bits)
pehrhovey	0:a548a085de55	126	*/
pehrhovey	0:a548a085de55	127	if (pp >= parts + 3)
pehrhovey	0:a548a085de55	128	return (0);
pehrhovey	0:a548a085de55	129	*pp++ = val;
pehrhovey	0:a548a085de55	130	c = *++cp;
pehrhovey	0:a548a085de55	131	} else
pehrhovey	0:a548a085de55	132	break;
pehrhovey	0:a548a085de55	133	}
pehrhovey	0:a548a085de55	134	/*
pehrhovey	0:a548a085de55	135	* Check for trailing characters.
pehrhovey	0:a548a085de55	136	*/
pehrhovey	0:a548a085de55	137	if (c != '\0' && !isspace(c))
pehrhovey	0:a548a085de55	138	return (0);
pehrhovey	0:a548a085de55	139	/*
pehrhovey	0:a548a085de55	140	* Concoct the address according to
pehrhovey	0:a548a085de55	141	* the number of parts specified.
pehrhovey	0:a548a085de55	142	*/
pehrhovey	0:a548a085de55	143	switch (pp - parts + 1) {
pehrhovey	0:a548a085de55	144
pehrhovey	0:a548a085de55	145	case 0:
pehrhovey	0:a548a085de55	146	return (0); /* initial nondigit */
pehrhovey	0:a548a085de55	147
pehrhovey	0:a548a085de55	148	case 1: /* a -- 32 bits */
pehrhovey	0:a548a085de55	149	break;
pehrhovey	0:a548a085de55	150
pehrhovey	0:a548a085de55	151	case 2: /* a.b -- 8.24 bits */
pehrhovey	0:a548a085de55	152	if (val > 0xffffffUL)
pehrhovey	0:a548a085de55	153	return (0);
pehrhovey	0:a548a085de55	154	val \|= parts[0] << 24;
pehrhovey	0:a548a085de55	155	break;
pehrhovey	0:a548a085de55	156
pehrhovey	0:a548a085de55	157	case 3: /* a.b.c -- 8.8.16 bits */
pehrhovey	0:a548a085de55	158	if (val > 0xffff)
pehrhovey	0:a548a085de55	159	return (0);
pehrhovey	0:a548a085de55	160	val \|= (parts[0] << 24) \| (parts[1] << 16);
pehrhovey	0:a548a085de55	161	break;
pehrhovey	0:a548a085de55	162
pehrhovey	0:a548a085de55	163	case 4: /* a.b.c.d -- 8.8.8.8 bits */
pehrhovey	0:a548a085de55	164	if (val > 0xff)
pehrhovey	0:a548a085de55	165	return (0);
pehrhovey	0:a548a085de55	166	val \|= (parts[0] << 24) \| (parts[1] << 16) \| (parts[2] << 8);
pehrhovey	0:a548a085de55	167	break;
pehrhovey	0:a548a085de55	168	}
pehrhovey	0:a548a085de55	169	if (addr)
pehrhovey	0:a548a085de55	170	addr->s_addr = htonl(val);
pehrhovey	0:a548a085de55	171	return (1);
pehrhovey	0:a548a085de55	172	}
pehrhovey	0:a548a085de55	173
pehrhovey	0:a548a085de55	174	/**
pehrhovey	0:a548a085de55	175	* Convert numeric IP address into decimal dotted ASCII representation.
pehrhovey	0:a548a085de55	176	* returns ptr to static buffer; not reentrant!
pehrhovey	0:a548a085de55	177	*
pehrhovey	0:a548a085de55	178	* @param addr ip address in network order to convert
pehrhovey	0:a548a085de55	179	* @return pointer to a global static (!) buffer that holds the ASCII
pehrhovey	0:a548a085de55	180	* represenation of addr
pehrhovey	0:a548a085de55	181	*/
pehrhovey	0:a548a085de55	182	char *
pehrhovey	0:a548a085de55	183	inet_ntoa(struct in_addr addr)
pehrhovey	0:a548a085de55	184	{
pehrhovey	0:a548a085de55	185	static char str[16];
pehrhovey	0:a548a085de55	186	u32_t s_addr = addr.s_addr;
pehrhovey	0:a548a085de55	187	char inv[3];
pehrhovey	0:a548a085de55	188	char *rp;
pehrhovey	0:a548a085de55	189	u8_t *ap;
pehrhovey	0:a548a085de55	190	u8_t rem;
pehrhovey	0:a548a085de55	191	u8_t n;
pehrhovey	0:a548a085de55	192	u8_t i;
pehrhovey	0:a548a085de55	193
pehrhovey	0:a548a085de55	194	rp = str;
pehrhovey	0:a548a085de55	195	ap = (u8_t *)&s_addr;
pehrhovey	0:a548a085de55	196	for(n = 0; n < 4; n++) {
pehrhovey	0:a548a085de55	197	i = 0;
pehrhovey	0:a548a085de55	198	do {
pehrhovey	0:a548a085de55	199	rem = *ap % (u8_t)10;
pehrhovey	0:a548a085de55	200	*ap /= (u8_t)10;
pehrhovey	0:a548a085de55	201	inv[i++] = '0' + rem;
pehrhovey	0:a548a085de55	202	} while(*ap);
pehrhovey	0:a548a085de55	203	while(i--)
pehrhovey	0:a548a085de55	204	*rp++ = inv[i];
pehrhovey	0:a548a085de55	205	*rp++ = '.';
pehrhovey	0:a548a085de55	206	ap++;
pehrhovey	0:a548a085de55	207	}
pehrhovey	0:a548a085de55	208	*--rp = 0;
pehrhovey	0:a548a085de55	209	return str;
pehrhovey	0:a548a085de55	210	}
pehrhovey	0:a548a085de55	211
pehrhovey	0:a548a085de55	212	/**
pehrhovey	0:a548a085de55	213	* These are reference implementations of the byte swapping functions.
pehrhovey	0:a548a085de55	214	* Again with the aim of being simple, correct and fully portable.
pehrhovey	0:a548a085de55	215	* Byte swapping is the second thing you would want to optimize. You will
pehrhovey	0:a548a085de55	216	* need to port it to your architecture and in your cc.h:
pehrhovey	0:a548a085de55	217	*
pehrhovey	0:a548a085de55	218	* #define LWIP_PLATFORM_BYTESWAP 1
pehrhovey	0:a548a085de55	219	* #define LWIP_PLATFORM_HTONS(x) <your_htons>
pehrhovey	0:a548a085de55	220	* #define LWIP_PLATFORM_HTONL(x) <your_htonl>
pehrhovey	0:a548a085de55	221	*
pehrhovey	0:a548a085de55	222	* Note ntohs() and ntohl() are merely references to the htonx counterparts.
pehrhovey	0:a548a085de55	223	*/
pehrhovey	0:a548a085de55	224
pehrhovey	0:a548a085de55	225	#if (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN)
pehrhovey	0:a548a085de55	226
pehrhovey	0:a548a085de55	227	/**
pehrhovey	0:a548a085de55	228	* Convert an u16_t from host- to network byte order.
pehrhovey	0:a548a085de55	229	*
pehrhovey	0:a548a085de55	230	* @param n u16_t in host byte order
pehrhovey	0:a548a085de55	231	* @return n in network byte order
pehrhovey	0:a548a085de55	232	*/
pehrhovey	0:a548a085de55	233	u16_t
pehrhovey	0:a548a085de55	234	htons(u16_t n)
pehrhovey	0:a548a085de55	235	{
pehrhovey	0:a548a085de55	236	return ((n & 0xff) << 8) \| ((n & 0xff00) >> 8);
pehrhovey	0:a548a085de55	237	}
pehrhovey	0:a548a085de55	238
pehrhovey	0:a548a085de55	239	/**
pehrhovey	0:a548a085de55	240	* Convert an u16_t from network- to host byte order.
pehrhovey	0:a548a085de55	241	*
pehrhovey	0:a548a085de55	242	* @param n u16_t in network byte order
pehrhovey	0:a548a085de55	243	* @return n in host byte order
pehrhovey	0:a548a085de55	244	*/
pehrhovey	0:a548a085de55	245	u16_t
pehrhovey	0:a548a085de55	246	ntohs(u16_t n)
pehrhovey	0:a548a085de55	247	{
pehrhovey	0:a548a085de55	248	return htons(n);
pehrhovey	0:a548a085de55	249	}
pehrhovey	0:a548a085de55	250
pehrhovey	0:a548a085de55	251	/**
pehrhovey	0:a548a085de55	252	* Convert an u32_t from host- to network byte order.
pehrhovey	0:a548a085de55	253	*
pehrhovey	0:a548a085de55	254	* @param n u32_t in host byte order
pehrhovey	0:a548a085de55	255	* @return n in network byte order
pehrhovey	0:a548a085de55	256	*/
pehrhovey	0:a548a085de55	257	u32_t
pehrhovey	0:a548a085de55	258	htonl(u32_t n)
pehrhovey	0:a548a085de55	259	{
pehrhovey	0:a548a085de55	260	return ((n & 0xff) << 24) \|
pehrhovey	0:a548a085de55	261	((n & 0xff00) << 8) \|
pehrhovey	0:a548a085de55	262	((n & 0xff0000UL) >> 8) \|
pehrhovey	0:a548a085de55	263	((n & 0xff000000UL) >> 24);
pehrhovey	0:a548a085de55	264	}
pehrhovey	0:a548a085de55	265
pehrhovey	0:a548a085de55	266	/**
pehrhovey	0:a548a085de55	267	* Convert an u32_t from network- to host byte order.
pehrhovey	0:a548a085de55	268	*
pehrhovey	0:a548a085de55	269	* @param n u32_t in network byte order
pehrhovey	0:a548a085de55	270	* @return n in host byte order
pehrhovey	0:a548a085de55	271	*/
pehrhovey	0:a548a085de55	272	u32_t
pehrhovey	0:a548a085de55	273	ntohl(u32_t n)
pehrhovey	0:a548a085de55	274	{
pehrhovey	0:a548a085de55	275	return htonl(n);
pehrhovey	0:a548a085de55	276	}
pehrhovey	0:a548a085de55	277
pehrhovey	0:a548a085de55	278	#endif /* (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN) */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	14 Mar 2010
Imports:	240
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	5

Core/lwIP/core/ipv4/inet.c@0:a548a085de55, 2010-03-14 (annotated)

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