W5200(WIZ820io) network interface
dnsname.h
- Committer:
- va009039
- Date:
- 2012-04-19
- Revision:
- 2:a8df39b4f3aa
- Parent:
- 0:61831b843b44
File content as of revision 2:a8df39b4f3aa:
// dnsname.h 2012/4/13 #ifndef DNSNAME_H #define DNSNAME_H class dnsname { public: uint8_t *buf; string str; dnsname(uint8_t *s) { buf = s; } int decode(int pos) { while(1) { int len = buf[pos++]; if (len == 0x00) { break; } if ((len&0xc0) == 0xc0) { //compress int offset = (len&0x3f)<<8|buf[pos]; decode(offset); return pos+1; } if (!str.empty()) { str.append("."); } str.append((const char*)(buf+pos), len); pos += len; } return pos; } int encode(int pos, char* s) { while(*s) { char *f = strchr(s, '.'); if (f == NULL) { int len = strlen(s); buf[pos++] = len; memcpy(buf+pos, s, len); pos += len; break; } int len = f - s; buf[pos++] = len; memcpy(buf+pos, s, len); s = f+1; pos += len; } buf[pos++] = 0x00; return pos; } }; #endif //DNSNAME_H