Austin Blackstone / Mbed 2 deprecated client-lwip-lightswitch-demo-expanded

mbed client lightswitch demo

Dependencies:   mbed Socket lwip-eth lwip-sys lwip

Fork of mbed-client-classic-example-lwip by Austin Blackstone

nanostack-libservice/source/libip6string/stoip6.c@11:cada08fc8a70, 2016-06-09 (annotated)

Committer:
mbedAustin
Date:
Thu Jun 09 17:08:36 2016 +0000
Revision:
11:cada08fc8a70
Commit for public Consumption

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbedAustin 11:cada08fc8a70 1 /*
mbedAustin 11:cada08fc8a70 2 * Copyright (c) 2014-2015 ARM Limited. All rights reserved.
mbedAustin 11:cada08fc8a70 3 * SPDX-License-Identifier: Apache-2.0
mbedAustin 11:cada08fc8a70 4 * Licensed under the Apache License, Version 2.0 (the License); you may
mbedAustin 11:cada08fc8a70 5 * not use this file except in compliance with the License.
mbedAustin 11:cada08fc8a70 6 * You may obtain a copy of the License at
mbedAustin 11:cada08fc8a70 7 *
mbedAustin 11:cada08fc8a70 8 * http://www.apache.org/licenses/LICENSE-2.0
mbedAustin 11:cada08fc8a70 9 *
mbedAustin 11:cada08fc8a70 10 * Unless required by applicable law or agreed to in writing, software
mbedAustin 11:cada08fc8a70 11 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
mbedAustin 11:cada08fc8a70 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbedAustin 11:cada08fc8a70 13 * See the License for the specific language governing permissions and
mbedAustin 11:cada08fc8a70 14 * limitations under the License.
mbedAustin 11:cada08fc8a70 15 */
mbedAustin 11:cada08fc8a70 16 #include <string.h>
mbedAustin 11:cada08fc8a70 17 #include <stdlib.h>
mbedAustin 11:cada08fc8a70 18 #include <stdint.h>
mbedAustin 11:cada08fc8a70 19 #include "common_functions.h"
mbedAustin 11:cada08fc8a70 20 #include "ip6string.h"
mbedAustin 11:cada08fc8a70 21
mbedAustin 11:cada08fc8a70 22 static uint16_t hex(const char *p);
mbedAustin 11:cada08fc8a70 23
mbedAustin 11:cada08fc8a70 24 /**
mbedAustin 11:cada08fc8a70 25 * Convert numeric IPv6 address string to a binary.
mbedAustin 11:cada08fc8a70 26 * IPv4 tunnelling addresses are not covered.
mbedAustin 11:cada08fc8a70 27 * \param ip6addr IPv6 address in string format.
mbedAustin 11:cada08fc8a70 28 * \param len Length of ipv6 string.
mbedAustin 11:cada08fc8a70 29 * \param dest buffer for address. MUST be 16 bytes.
mbedAustin 11:cada08fc8a70 30 */
mbedAustin 11:cada08fc8a70 31 void stoip6(const char *ip6addr, size_t len, void *dest)
mbedAustin 11:cada08fc8a70 32 {
mbedAustin 11:cada08fc8a70 33 uint8_t *addr;
mbedAustin 11:cada08fc8a70 34 const char *p, *q;
mbedAustin 11:cada08fc8a70 35 int_fast8_t field_no, coloncolon = -1;
mbedAustin 11:cada08fc8a70 36
mbedAustin 11:cada08fc8a70 37 addr = dest;
mbedAustin 11:cada08fc8a70 38
mbedAustin 11:cada08fc8a70 39 if (len > 39) { // Too long, not possible. We do not support IPv4-mapped IPv6 addresses
mbedAustin 11:cada08fc8a70 40 return;
mbedAustin 11:cada08fc8a70 41 }
mbedAustin 11:cada08fc8a70 42
mbedAustin 11:cada08fc8a70 43 // First go forward the string, until end, noting :: position if any
mbedAustin 11:cada08fc8a70 44 for (field_no = 0, p = ip6addr; (len > (p - ip6addr)) && *p && field_no < 8; p = q + 1) {
mbedAustin 11:cada08fc8a70 45 q = p;
mbedAustin 11:cada08fc8a70 46 // Seek for ':' or end
mbedAustin 11:cada08fc8a70 47 while (*q && (*q != ':')) {
mbedAustin 11:cada08fc8a70 48 q++;
mbedAustin 11:cada08fc8a70 49 }
mbedAustin 11:cada08fc8a70 50 //Convert and write this part, (high-endian AKA network byte order)
mbedAustin 11:cada08fc8a70 51 addr = common_write_16_bit(hex(p), addr);
mbedAustin 11:cada08fc8a70 52 field_no++;
mbedAustin 11:cada08fc8a70 53 //Check if we reached "::"
mbedAustin 11:cada08fc8a70 54 if ((len > (q - ip6addr)) && *q && (q[0] == ':') && (q[1] == ':')) {
mbedAustin 11:cada08fc8a70 55 coloncolon = field_no;
mbedAustin 11:cada08fc8a70 56 q++;
mbedAustin 11:cada08fc8a70 57 }
mbedAustin 11:cada08fc8a70 58 }
mbedAustin 11:cada08fc8a70 59
mbedAustin 11:cada08fc8a70 60 if (coloncolon != -1) {
mbedAustin 11:cada08fc8a70 61 /* Insert zeros in the appropriate place */
mbedAustin 11:cada08fc8a70 62 uint_fast8_t head_size = 2 * coloncolon;
mbedAustin 11:cada08fc8a70 63 uint_fast8_t inserted_size = 2 * (8 - field_no);
mbedAustin 11:cada08fc8a70 64 uint_fast8_t tail_size = 16 - head_size - inserted_size;
mbedAustin 11:cada08fc8a70 65 addr = dest;
mbedAustin 11:cada08fc8a70 66 memmove(addr + head_size + inserted_size, addr + head_size, tail_size);
mbedAustin 11:cada08fc8a70 67 memset(addr + head_size, 0, inserted_size);
mbedAustin 11:cada08fc8a70 68 } else if (field_no != 8) {
mbedAustin 11:cada08fc8a70 69 /* Should really report an error if we didn't get 8 fields */
mbedAustin 11:cada08fc8a70 70 memset(addr, 0, 16 - field_no * 2);
mbedAustin 11:cada08fc8a70 71 }
mbedAustin 11:cada08fc8a70 72 }
mbedAustin 11:cada08fc8a70 73 unsigned char sipv6_prefixlength(const char *ip6addr)
mbedAustin 11:cada08fc8a70 74 {
mbedAustin 11:cada08fc8a70 75 char *ptr = strchr(ip6addr, '/');
mbedAustin 11:cada08fc8a70 76 if (ptr) {
mbedAustin 11:cada08fc8a70 77 return (unsigned char)strtoul(ptr + 1, 0, 10);
mbedAustin 11:cada08fc8a70 78 }
mbedAustin 11:cada08fc8a70 79 return 0;
mbedAustin 11:cada08fc8a70 80 }
mbedAustin 11:cada08fc8a70 81 static uint16_t hex(const char *p)
mbedAustin 11:cada08fc8a70 82 {
mbedAustin 11:cada08fc8a70 83 uint16_t val = 0;
mbedAustin 11:cada08fc8a70 84
mbedAustin 11:cada08fc8a70 85 for (;;) {
mbedAustin 11:cada08fc8a70 86 char c = *p++;
mbedAustin 11:cada08fc8a70 87 if ((c >= '0') && (c <= '9')) {
mbedAustin 11:cada08fc8a70 88 val = (val << 4) | (c - '0');
mbedAustin 11:cada08fc8a70 89 } else if ((c >= 'A') && (c <= 'F')) {
mbedAustin 11:cada08fc8a70 90 val = (val << 4) | (10 + (c - 'A'));
mbedAustin 11:cada08fc8a70 91 } else if ((c >= 'a') && (c <= 'f')) {
mbedAustin 11:cada08fc8a70 92 val = (val << 4) | (10 + (c - 'a'));
mbedAustin 11:cada08fc8a70 93 } else {
mbedAustin 11:cada08fc8a70 94 break; // Non hex character
mbedAustin 11:cada08fc8a70 95 }
mbedAustin 11:cada08fc8a70 96 }
mbedAustin 11:cada08fc8a70 97 return val;
mbedAustin 11:cada08fc8a70 98 }