| 14 | |
| 15 | namespace NNetliba { |
| 16 | static bool IsValidIPv6(const char* sz) { |
| 17 | enum { |
| 18 | S1, |
| 19 | SEMICOLON, |
| 20 | SCOPE |
| 21 | }; |
| 22 | int state = S1, scCount = 0, digitCount = 0, hasDoubleSemicolon = false; |
| 23 | while (*sz) { |
| 24 | if (state == S1) { |
| 25 | switch (*sz) { |
| 26 | case '0': |
| 27 | case '1': |
| 28 | case '2': |
| 29 | case '3': |
| 30 | case '4': |
| 31 | case '5': |
| 32 | case '6': |
| 33 | case '7': |
| 34 | case '8': |
| 35 | case '9': |
| 36 | case 'A': |
| 37 | case 'B': |
| 38 | case 'C': |
| 39 | case 'D': |
| 40 | case 'E': |
| 41 | case 'F': |
| 42 | case 'a': |
| 43 | case 'b': |
| 44 | case 'c': |
| 45 | case 'd': |
| 46 | case 'e': |
| 47 | case 'f': |
| 48 | ++digitCount; |
| 49 | if (digitCount > 4) |
| 50 | return false; |
| 51 | break; |
| 52 | case ':': |
| 53 | state = SEMICOLON; |
| 54 | ++scCount; |
| 55 | break; |
| 56 | case '%': |
| 57 | state = SCOPE; |
| 58 | break; |
| 59 | default: |
| 60 | return false; |
| 61 | } |
| 62 | ++sz; |
| 63 | } else if (state == SEMICOLON) { |
| 64 | if (*sz == ':') { |
| 65 | if (hasDoubleSemicolon) |
| 66 | return false; |
| 67 | hasDoubleSemicolon = true; |
| 68 | ++scCount; |
| 69 | digitCount = 0; |
| 70 | state = S1; |
| 71 | ++sz; |
| 72 | } else { |
| 73 | digitCount = 0; |