| 1 | #include "cll1-0.6.2.h" |
| 2 | |
| 3 | /* ====== iptables indexes are used to reduce complexity to log(N) ===== */ |
| 4 | |
| 5 | char *very_ugly_ipv6_code(char *inip, int bitmask, int format_as_chainname) |
| 6 | { |
| 7 | int colon=0, n, h; |
| 8 | char *ip,*outip,*outptr,*fmt; |
| 9 | |
| 10 | duplicate(inip,ip); |
| 11 | /* debug printf("(%s,%d) -> ",ip,bitmask); */ |
| 12 | |
| 13 | if(ip && *ip && bitmask>=0 && bitmask<=64) |
| 14 | { |
| 15 | string(outip,strlen(ip)+10); /* assertion: 10>strlen("_%d_%d") */ |
| 16 | } |
| 17 | else |
| 18 | { |
| 19 | /* should never exit here */ |
| 20 | return "undefined"; |
| 21 | } |
| 22 | outptr=outip; |
| 23 | while(ip && *ip) |
| 24 | { |
| 25 | if(*ip==':') |
| 26 | { |
| 27 | if(colon<(bitmask/16-1)) |
| 28 | { |
| 29 | if(format_as_chainname) |
| 30 | { |
| 31 | *outptr='_'; |
| 32 | } |
| 33 | else |
| 34 | { |
| 35 | *outptr=':'; |
| 36 | } |
| 37 | outptr++; |
| 38 | colon++; |
| 39 | } |
| 40 | else |
| 41 | { |
| 42 | char *cutcolon=strchr(ip+1,':'); |
| 43 | if(cutcolon) |
| 44 | { |
| 45 | *cutcolon = '\0'; |
| 46 | } |
| 47 | |
| 48 | if(format_as_chainname) |
| 49 | { |
| 50 | fmt = "_%x_%d"; |
| 51 | } |
| 52 | else |
| 53 | { |
| 54 | fmt = ":%x"; |
| 55 | } |
| 56 | |
| 57 | if(bitmask%16) |
| 58 | { |
| 59 | sscanf(ip+1, "%x", &h); |
| 60 | /* printf("[debug - %s scanned hexa as %x]\n",ip+1,h);*/ |
| 61 | n = h-h%(1<<(16-bitmask%16)); |
| 62 | } |
| 63 | else |
| 64 | { |
| 65 | n = 0; |
| 66 | } |
| 67 | |
| 68 | /* printf("%d/%d => [_%d_%d]\n",h,bitmask,n,bitmask); */ |
| 69 | sprintf(outptr,fmt,n,bitmask); |
| 70 | if(!format_as_chainname) |
| 71 | { |
| 72 | strcat(outip,"::"); /* ahem :-) */ |
| 73 | } |
| 74 | /* debug printf("[%s]\n",outip); */ |
| 75 | return outip; |
| 76 | } |
| 77 | } |
| 78 | else |
| 79 | { |
| 80 | *outptr=*ip; |
| 81 | outptr++; |
| 82 | } |
| 83 | ip++; |
| 84 | } |
| 85 | /*should never exit here*/ |
| 86 | *outptr='\0'; |
| 87 | return outip; |
| 88 | } |
| 89 | |
| 90 | char *index6_id(char *ip,int bitmask) |
| 91 | { |
| 92 | return very_ugly_ipv6_code(ip,bitmask,1); |
| 93 | } |
| 94 | |
| 95 | char *subnet6_id(char *ip,int bitmask) |
| 96 | { |
| 97 | return very_ugly_ipv6_code(ip,bitmask,0); |
| 98 | } |