joey shelton / LED_Demo

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Dependencies:   MAX44000 PWM_Tone_Library nexpaq_mdk

Fork of LED_Demo by Maxim nexpaq

mbd_os/features/FEATURE_COMMON_PAL/nanostack-libservice/source/libip6string/stoip6.c@9:6bb35cef007d, 2016-10-22 (annotated)

Committer:
cyberjoey
Date:
Sat Oct 22 01:31:58 2016 +0000
Revision:
9:6bb35cef007d
Parent:
1:55a6170b404f 
WORKING

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nexpaq 1:55a6170b404f 1 /*
nexpaq 1:55a6170b404f 2 * Copyright (c) 2014-2015 ARM Limited. All rights reserved.
nexpaq 1:55a6170b404f 3 * SPDX-License-Identifier: Apache-2.0
nexpaq 1:55a6170b404f 4 * Licensed under the Apache License, Version 2.0 (the License); you may
nexpaq 1:55a6170b404f 5 * not use this file except in compliance with the License.
nexpaq 1:55a6170b404f 6 * You may obtain a copy of the License at
nexpaq 1:55a6170b404f 7 *
nexpaq 1:55a6170b404f 8 * http://www.apache.org/licenses/LICENSE-2.0
nexpaq 1:55a6170b404f 9 *
nexpaq 1:55a6170b404f 10 * Unless required by applicable law or agreed to in writing, software
nexpaq 1:55a6170b404f 11 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
nexpaq 1:55a6170b404f 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
nexpaq 1:55a6170b404f 13 * See the License for the specific language governing permissions and
nexpaq 1:55a6170b404f 14 * limitations under the License.
nexpaq 1:55a6170b404f 15 */
nexpaq 1:55a6170b404f 16 #include <string.h>
nexpaq 1:55a6170b404f 17 #include <stdlib.h>
nexpaq 1:55a6170b404f 18 #include <stdint.h>
nexpaq 1:55a6170b404f 19 #include "common_functions.h"
nexpaq 1:55a6170b404f 20 #include "ip6string.h"
nexpaq 1:55a6170b404f 21
nexpaq 1:55a6170b404f 22 static uint16_t hex(const char *p);
nexpaq 1:55a6170b404f 23
nexpaq 1:55a6170b404f 24 /**
nexpaq 1:55a6170b404f 25 * Convert numeric IPv6 address string to a binary.
nexpaq 1:55a6170b404f 26 * IPv4 tunnelling addresses are not covered.
nexpaq 1:55a6170b404f 27 * \param ip6addr IPv6 address in string format.
nexpaq 1:55a6170b404f 28 * \param len Length of ipv6 string.
nexpaq 1:55a6170b404f 29 * \param dest buffer for address. MUST be 16 bytes.
nexpaq 1:55a6170b404f 30 */
nexpaq 1:55a6170b404f 31 void stoip6(const char *ip6addr, size_t len, void *dest)
nexpaq 1:55a6170b404f 32 {
nexpaq 1:55a6170b404f 33 uint8_t *addr;
nexpaq 1:55a6170b404f 34 const char *p, *q;
nexpaq 1:55a6170b404f 35 int_fast8_t field_no, coloncolon = -1;
nexpaq 1:55a6170b404f 36
nexpaq 1:55a6170b404f 37 addr = dest;
nexpaq 1:55a6170b404f 38
nexpaq 1:55a6170b404f 39 if (len > 39) { // Too long, not possible. We do not support IPv4-mapped IPv6 addresses
nexpaq 1:55a6170b404f 40 return;
nexpaq 1:55a6170b404f 41 }
nexpaq 1:55a6170b404f 42
nexpaq 1:55a6170b404f 43 // First go forward the string, until end, noting :: position if any
nexpaq 1:55a6170b404f 44 for (field_no = 0, p = ip6addr; (len > (p - ip6addr)) && *p && field_no < 8; p = q + 1) {
nexpaq 1:55a6170b404f 45 q = p;
nexpaq 1:55a6170b404f 46 // Seek for ':' or end
nexpaq 1:55a6170b404f 47 while (*q && (*q != ':')) {
nexpaq 1:55a6170b404f 48 q++;
nexpaq 1:55a6170b404f 49 }
nexpaq 1:55a6170b404f 50 //Convert and write this part, (high-endian AKA network byte order)
nexpaq 1:55a6170b404f 51 addr = common_write_16_bit(hex(p), addr);
nexpaq 1:55a6170b404f 52 field_no++;
nexpaq 1:55a6170b404f 53 //Check if we reached "::"
nexpaq 1:55a6170b404f 54 if ((len > (q - ip6addr)) && *q && (q[0] == ':') && (q[1] == ':')) {
nexpaq 1:55a6170b404f 55 coloncolon = field_no;
nexpaq 1:55a6170b404f 56 q++;
nexpaq 1:55a6170b404f 57 }
nexpaq 1:55a6170b404f 58 }
nexpaq 1:55a6170b404f 59
nexpaq 1:55a6170b404f 60 if (coloncolon != -1) {
nexpaq 1:55a6170b404f 61 /* Insert zeros in the appropriate place */
nexpaq 1:55a6170b404f 62 uint_fast8_t head_size = 2 * coloncolon;
nexpaq 1:55a6170b404f 63 uint_fast8_t inserted_size = 2 * (8 - field_no);
nexpaq 1:55a6170b404f 64 uint_fast8_t tail_size = 16 - head_size - inserted_size;
nexpaq 1:55a6170b404f 65 addr = dest;
nexpaq 1:55a6170b404f 66 memmove(addr + head_size + inserted_size, addr + head_size, tail_size);
nexpaq 1:55a6170b404f 67 memset(addr + head_size, 0, inserted_size);
nexpaq 1:55a6170b404f 68 } else if (field_no != 8) {
nexpaq 1:55a6170b404f 69 /* Should really report an error if we didn't get 8 fields */
nexpaq 1:55a6170b404f 70 memset(addr, 0, 16 - field_no * 2);
nexpaq 1:55a6170b404f 71 }
nexpaq 1:55a6170b404f 72 }
nexpaq 1:55a6170b404f 73 unsigned char sipv6_prefixlength(const char *ip6addr)
nexpaq 1:55a6170b404f 74 {
nexpaq 1:55a6170b404f 75 char *ptr = strchr(ip6addr, '/');
nexpaq 1:55a6170b404f 76 if (ptr) {
nexpaq 1:55a6170b404f 77 return (unsigned char)strtoul(ptr + 1, 0, 10);
nexpaq 1:55a6170b404f 78 }
nexpaq 1:55a6170b404f 79 return 0;
nexpaq 1:55a6170b404f 80 }
nexpaq 1:55a6170b404f 81 static uint16_t hex(const char *p)
nexpaq 1:55a6170b404f 82 {
nexpaq 1:55a6170b404f 83 uint16_t val = 0;
nexpaq 1:55a6170b404f 84
nexpaq 1:55a6170b404f 85 for (;;) {
nexpaq 1:55a6170b404f 86 char c = *p++;
nexpaq 1:55a6170b404f 87 if ((c >= '0') && (c <= '9')) {
nexpaq 1:55a6170b404f 88 val = (val << 4) | (c - '0');
nexpaq 1:55a6170b404f 89 } else if ((c >= 'A') && (c <= 'F')) {
nexpaq 1:55a6170b404f 90 val = (val << 4) | (10 + (c - 'A'));
nexpaq 1:55a6170b404f 91 } else if ((c >= 'a') && (c <= 'f')) {
nexpaq 1:55a6170b404f 92 val = (val << 4) | (10 + (c - 'a'));
nexpaq 1:55a6170b404f 93 } else {
nexpaq 1:55a6170b404f 94 break; // Non hex character
nexpaq 1:55a6170b404f 95 }
nexpaq 1:55a6170b404f 96 }
nexpaq 1:55a6170b404f 97 return val;
nexpaq 1:55a6170b404f 98 }