Pratik Sheth / WIZnet_Library

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WIZnetInterface/DNSClient/dnsname.h@9:ff1416913201, 2019-01-23 (annotated)

Committer:
pratik_sheth_
Date:
Wed Jan 23 17:20:02 2019 +0000
Revision:
9:ff1416913201
Parent:
0:b72d22e10709 
Implemented a sensor node that could sense data from any connected sensor and transmit it over an Ethernet interface to a thingspeak.com

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jbkim 0:b72d22e10709 1 // dnsname.h 2013/8/27
jbkim 0:b72d22e10709 2 #pragma once
jbkim 0:b72d22e10709 3 //#include <string>
jbkim 0:b72d22e10709 4 #include "pico_string.h"
jbkim 0:b72d22e10709 5 class dnsname {
jbkim 0:b72d22e10709 6 public:
jbkim 0:b72d22e10709 7 uint8_t *buf;
jbkim 0:b72d22e10709 8 pico_string str;
jbkim 0:b72d22e10709 9 dnsname(uint8_t *s) {
jbkim 0:b72d22e10709 10 buf = s;
jbkim 0:b72d22e10709 11 }
jbkim 0:b72d22e10709 12 int decode(int pos) {
jbkim 0:b72d22e10709 13 while(1) {
jbkim 0:b72d22e10709 14 int len = buf[pos++];
jbkim 0:b72d22e10709 15 if (len == 0x00) {
jbkim 0:b72d22e10709 16 break;
jbkim 0:b72d22e10709 17 }
jbkim 0:b72d22e10709 18 if ((len&0xc0) == 0xc0) { //compress
jbkim 0:b72d22e10709 19 int offset = (len&0x3f)<<8|buf[pos];
jbkim 0:b72d22e10709 20 decode(offset);
jbkim 0:b72d22e10709 21 return pos+1;
jbkim 0:b72d22e10709 22 }
jbkim 0:b72d22e10709 23 if (!str.empty()) {
jbkim 0:b72d22e10709 24 str.append(".");
jbkim 0:b72d22e10709 25 }
jbkim 0:b72d22e10709 26 str.append((const char*)(buf+pos), len);
jbkim 0:b72d22e10709 27 pos += len;
jbkim 0:b72d22e10709 28 }
jbkim 0:b72d22e10709 29 return pos;
jbkim 0:b72d22e10709 30 }
jbkim 0:b72d22e10709 31
jbkim 0:b72d22e10709 32 int encode(int pos, char* s) {
jbkim 0:b72d22e10709 33 while(*s) {
jbkim 0:b72d22e10709 34 char *f = strchr(s, '.');
jbkim 0:b72d22e10709 35 if (f == NULL) {
jbkim 0:b72d22e10709 36 int len = strlen(s);
jbkim 0:b72d22e10709 37 buf[pos++] = len;
jbkim 0:b72d22e10709 38 memcpy(buf+pos, s, len);
jbkim 0:b72d22e10709 39 pos += len;
jbkim 0:b72d22e10709 40 break;
jbkim 0:b72d22e10709 41 }
jbkim 0:b72d22e10709 42 int len = f - s;
jbkim 0:b72d22e10709 43 buf[pos++] = len;
jbkim 0:b72d22e10709 44 memcpy(buf+pos, s, len);
jbkim 0:b72d22e10709 45 s = f+1;
jbkim 0:b72d22e10709 46 pos += len;
jbkim 0:b72d22e10709 47 }
jbkim 0:b72d22e10709 48 buf[pos++] = 0x00;
jbkim 0:b72d22e10709 49 return pos;
jbkim 0:b72d22e10709 50 }
jbkim 0:b72d22e10709 51 };
jbkim 0:b72d22e10709 52