59c3032e |
1 | #include "cll1-0.6.2.h"\r |
2 | \r |
3 | /* ====== iptables indexes are used to reduce complexity to log8(N) ===== */\r |
4 | \r |
5 | char *very_ugly_ipv4_code(char *inip, int bitmask, int format_as_chainname)\r |
6 | {\r |
7 | /* warning: this function was debugged only for bitmask values 20,24,28 !!!*/\r |
8 | int dot=0, n;\r |
9 | char *ip,*outip,*outptr,*fmt;\r |
10 | \r |
11 | duplicate(inip,ip);\r |
12 | /* debug printf("(%s,%d) -> ",ip,bitmask); */\r |
13 | \r |
14 | if(ip && *ip && bitmask>=0 && bitmask<=32)\r |
15 | {\r |
16 | string(outip,strlen(ip)+10); /*fuck unicode? assertion: 10>strlen("_%d_%d") */\r |
17 | }\r |
18 | else \r |
19 | {\r |
20 | /* should never exit here */\r |
21 | return "undefined";\r |
22 | }\r |
23 | outptr=outip;\r |
24 | while(ip && *ip)\r |
25 | {\r |
26 | if(*ip=='.')\r |
27 | {\r |
28 | if(dot<(bitmask/8-1)) \r |
29 | {\r |
30 | if(format_as_chainname)\r |
31 | {\r |
32 | *outptr='_';\r |
33 | }\r |
34 | else\r |
35 | {\r |
36 | *outptr='.';\r |
37 | }\r |
38 | outptr++;\r |
39 | dot++;\r |
40 | }\r |
41 | else\r |
42 | {\r |
43 | char *cutdot=strchr(ip+1,'.'); /*for bitmask<24*/ \r |
44 | if(cutdot)\r |
45 | {\r |
46 | *cutdot = '\0';\r |
47 | }\r |
48 | \r |
49 | if(format_as_chainname)\r |
50 | {\r |
51 | fmt = "_%d_%d";\r |
52 | }\r |
53 | else\r |
54 | {\r |
55 | fmt = ".%d";\r |
56 | }\r |
57 | \r |
58 | if(bitmask%8)\r |
59 | {\r |
60 | n = atoi(ip+1)-atoi(ip+1)%(1<<(8-bitmask%8));\r |
61 | }\r |
62 | else\r |
63 | {\r |
64 | n = 0;\r |
65 | }\r |
66 | \r |
67 | /*debug printf("%d/%d => [_%d_%d]\n",atoi(ip+1),bitmask,n,bitmask); */\r |
68 | sprintf(outptr,fmt,n,bitmask);\r |
69 | if(!format_as_chainname)\r |
70 | {\r |
71 | while(bitmask<24)\r |
72 | {\r |
73 | strcat(outip,".0");\r |
74 | bitmask+=8;\r |
75 | }\r |
76 | }\r |
77 | /* debug printf("[%s]\n",outip); */\r |
78 | return outip;\r |
79 | }\r |
80 | }\r |
81 | else \r |
82 | {\r |
83 | *outptr=*ip;\r |
84 | outptr++;\r |
85 | }\r |
86 | ip++;\r |
87 | }\r |
88 | /*should never exit here*/\r |
89 | *outptr='\0';\r |
90 | return outip;\r |
91 | }\r |
92 | \r |
93 | char *index_id(char *ip,int bitmask)\r |
94 | { \r |
95 | return very_ugly_ipv4_code(ip,bitmask,1);\r |
96 | }\r |
97 | \r |
98 | char *subnet_id(char *ip,int bitmask)\r |
99 | {\r |
100 | return very_ugly_ipv4_code(ip,bitmask,0);\r |
101 | }\r |