Norimasa Okamoto
W5200(WIZ820io) network interface
dnsname.h@2:a8df39b4f3aa, 2012-04-19 (annotated)
- Committer:
- va009039
- Date:
- Thu Apr 19 11:14:43 2012 +0000
- Revision:
- 2:a8df39b4f3aa
- Parent:
- 0:61831b843b44
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| va009039 | 0:61831b843b44 | 1 | // dnsname.h 2012/4/13 |
| va009039 | 0:61831b843b44 | 2 | #ifndef DNSNAME_H |
| va009039 | 0:61831b843b44 | 3 | #define DNSNAME_H |
| va009039 | 0:61831b843b44 | 4 | class dnsname { |
| va009039 | 0:61831b843b44 | 5 | public: |
| va009039 | 0:61831b843b44 | 6 | uint8_t *buf; |
| va009039 | 0:61831b843b44 | 7 | string str; |
| va009039 | 0:61831b843b44 | 8 | dnsname(uint8_t *s) { |
| va009039 | 0:61831b843b44 | 9 | buf = s; |
| va009039 | 0:61831b843b44 | 10 | } |
| va009039 | 0:61831b843b44 | 11 | int decode(int pos) { |
| va009039 | 0:61831b843b44 | 12 | while(1) { |
| va009039 | 0:61831b843b44 | 13 | int len = buf[pos++]; |
| va009039 | 0:61831b843b44 | 14 | if (len == 0x00) { |
| va009039 | 0:61831b843b44 | 15 | break; |
| va009039 | 0:61831b843b44 | 16 | } |
| va009039 | 0:61831b843b44 | 17 | if ((len&0xc0) == 0xc0) { //compress |
| va009039 | 0:61831b843b44 | 18 | int offset = (len&0x3f)<<8|buf[pos]; |
| va009039 | 0:61831b843b44 | 19 | decode(offset); |
| va009039 | 0:61831b843b44 | 20 | return pos+1; |
| va009039 | 0:61831b843b44 | 21 | } |
| va009039 | 0:61831b843b44 | 22 | if (!str.empty()) { |
| va009039 | 0:61831b843b44 | 23 | str.append("."); |
| va009039 | 0:61831b843b44 | 24 | } |
| va009039 | 0:61831b843b44 | 25 | str.append((const char*)(buf+pos), len); |
| va009039 | 0:61831b843b44 | 26 | pos += len; |
| va009039 | 0:61831b843b44 | 27 | } |
| va009039 | 0:61831b843b44 | 28 | return pos; |
| va009039 | 0:61831b843b44 | 29 | } |
| va009039 | 0:61831b843b44 | 30 | |
| va009039 | 0:61831b843b44 | 31 | int encode(int pos, char* s) { |
| va009039 | 0:61831b843b44 | 32 | while(*s) { |
| va009039 | 0:61831b843b44 | 33 | char *f = strchr(s, '.'); |
| va009039 | 0:61831b843b44 | 34 | if (f == NULL) { |
| va009039 | 0:61831b843b44 | 35 | int len = strlen(s); |
| va009039 | 0:61831b843b44 | 36 | buf[pos++] = len; |
| va009039 | 0:61831b843b44 | 37 | memcpy(buf+pos, s, len); |
| va009039 | 0:61831b843b44 | 38 | pos += len; |
| va009039 | 0:61831b843b44 | 39 | break; |
| va009039 | 0:61831b843b44 | 40 | } |
| va009039 | 0:61831b843b44 | 41 | int len = f - s; |
| va009039 | 0:61831b843b44 | 42 | buf[pos++] = len; |
| va009039 | 0:61831b843b44 | 43 | memcpy(buf+pos, s, len); |
| va009039 | 0:61831b843b44 | 44 | s = f+1; |
| va009039 | 0:61831b843b44 | 45 | pos += len; |
| va009039 | 0:61831b843b44 | 46 | } |
| va009039 | 0:61831b843b44 | 47 | buf[pos++] = 0x00; |
| va009039 | 0:61831b843b44 | 48 | return pos; |
| va009039 | 0:61831b843b44 | 49 | } |
| va009039 | 0:61831b843b44 | 50 | }; |
| va009039 | 0:61831b843b44 | 51 | #endif //DNSNAME_H |