Hill Kim / W5200Interface

MQTT client test with W5200 ethernet shield

Dependents:   IBMIoTClientEthernetExample_W5200

Fork of W5500Interface by W5500-Ethernet-Interface Makers

DNSClient/dnsname.h@11:313e091ab3f9, 2014-12-25 (annotated)

Committer:
hillkim7
Date:
Thu Dec 25 11:18:46 2014 +0000
Revision:
11:313e091ab3f9
Parent:
0:e11e8793c3ce 
The IBM MQTT client demo program that is tested with Nucleo F401 and Seeedstudio Ethernet Shield. It is based on Wiznet sample program.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Bongjun 0:e11e8793c3ce 1 // dnsname.h 2013/8/27
Bongjun 0:e11e8793c3ce 2 #pragma once
Bongjun 0:e11e8793c3ce 3 //#include <string>
Bongjun 0:e11e8793c3ce 4 #include "pico_string.h"
Bongjun 0:e11e8793c3ce 5 class dnsname {
Bongjun 0:e11e8793c3ce 6 public:
Bongjun 0:e11e8793c3ce 7 uint8_t *buf;
Bongjun 0:e11e8793c3ce 8 pico_string str;
Bongjun 0:e11e8793c3ce 9 dnsname(uint8_t *s) {
Bongjun 0:e11e8793c3ce 10 buf = s;
Bongjun 0:e11e8793c3ce 11 }
Bongjun 0:e11e8793c3ce 12 int decode(int pos) {
Bongjun 0:e11e8793c3ce 13 while(1) {
Bongjun 0:e11e8793c3ce 14 int len = buf[pos++];
Bongjun 0:e11e8793c3ce 15 if (len == 0x00) {
Bongjun 0:e11e8793c3ce 16 break;
Bongjun 0:e11e8793c3ce 17 }
Bongjun 0:e11e8793c3ce 18 if ((len&0xc0) == 0xc0) { //compress
Bongjun 0:e11e8793c3ce 19 int offset = (len&0x3f)<<8|buf[pos];
Bongjun 0:e11e8793c3ce 20 decode(offset);
Bongjun 0:e11e8793c3ce 21 return pos+1;
Bongjun 0:e11e8793c3ce 22 }
Bongjun 0:e11e8793c3ce 23 if (!str.empty()) {
Bongjun 0:e11e8793c3ce 24 str.append(".");
Bongjun 0:e11e8793c3ce 25 }
Bongjun 0:e11e8793c3ce 26 str.append((const char*)(buf+pos), len);
Bongjun 0:e11e8793c3ce 27 pos += len;
Bongjun 0:e11e8793c3ce 28 }
Bongjun 0:e11e8793c3ce 29 return pos;
Bongjun 0:e11e8793c3ce 30 }
Bongjun 0:e11e8793c3ce 31
Bongjun 0:e11e8793c3ce 32 int encode(int pos, char* s) {
Bongjun 0:e11e8793c3ce 33 while(*s) {
Bongjun 0:e11e8793c3ce 34 char *f = strchr(s, '.');
Bongjun 0:e11e8793c3ce 35 if (f == NULL) {
Bongjun 0:e11e8793c3ce 36 int len = strlen(s);
Bongjun 0:e11e8793c3ce 37 buf[pos++] = len;
Bongjun 0:e11e8793c3ce 38 memcpy(buf+pos, s, len);
Bongjun 0:e11e8793c3ce 39 pos += len;
Bongjun 0:e11e8793c3ce 40 break;
Bongjun 0:e11e8793c3ce 41 }
Bongjun 0:e11e8793c3ce 42 int len = f - s;
Bongjun 0:e11e8793c3ce 43 buf[pos++] = len;
Bongjun 0:e11e8793c3ce 44 memcpy(buf+pos, s, len);
Bongjun 0:e11e8793c3ce 45 s = f+1;
Bongjun 0:e11e8793c3ce 46 pos += len;
Bongjun 0:e11e8793c3ce 47 }
Bongjun 0:e11e8793c3ce 48 buf[pos++] = 0x00;
Bongjun 0:e11e8793c3ce 49 return pos;
Bongjun 0:e11e8793c3ce 50 }
Bongjun 0:e11e8793c3ce 51 };