some bugfixes

[svn/Prometheus-QoS/.git] / ipv4subnets.c

#include "cll1-0.6.2.h"\r
\r
/* ====== iptables indexes are used to reduce complexity to log(N) ===== */\r
\r
char *very_ugly_ipv4_code(char *inip, int bitmask, int format_as_chainname)\r
{\r
 int dot=0, n;\r
 char *ip,*outip,*outptr,*fmt;\r
\r
 duplicate(inip,ip);\r
 /* debug printf("(%s,%d) -> ",ip,bitmask); */\r
\r
 if(ip && *ip && bitmask>=0 && bitmask<=32)\r
 {\r
  string(outip,strlen(ip)+10); /* assertion: 10>strlen("_%d_%d") */\r
 }\r
 else \r
 {\r
  /* should never exit here */\r
  return "undefined";\r
 }\r
 outptr=outip;\r
 while(ip && *ip)\r
 {\r
  if(*ip=='.')\r
  {\r
   if(dot<(bitmask/8-1)) \r
   {\r
    if(format_as_chainname)\r
    {\r
     *outptr='_';\r
    }\r
    else\r
    {\r
     *outptr='.';\r
    }\r
    outptr++;\r
    dot++;\r
   }\r
   else\r
   {\r
    char *cutdot=strchr(ip+1,'.'); /*for bitmask<24*/    \r
    if(cutdot)\r
    {\r
     *cutdot = '\0';\r
    }\r
    \r
    if(format_as_chainname)\r
    {\r
     fmt = "_%d_%d";\r
    }\r
    else\r
    {\r
     fmt = ".%d";\r
    }\r
    \r
    if(bitmask%8)\r
    {\r
     n = atoi(ip+1)-atoi(ip+1)%(1<<(8-bitmask%8));\r
    }\r
    else\r
    {\r
     n = 0;\r
    }\r
\r
    /*debug  printf("%d/%d => [_%d_%d]\n",atoi(ip+1),bitmask,n,bitmask); */\r
    sprintf(outptr,fmt,n,bitmask);\r
    if(!format_as_chainname)\r
    {\r
     while(bitmask<24)\r
     {\r
      strcat(outip,".0");\r
      bitmask+=8;\r
     }\r
    }\r
    /* debug printf("[%s]\n",outip); */\r
    return outip;\r
   }\r
  }\r
  else \r
  {\r
   *outptr=*ip;\r
   outptr++;\r
  }\r
  ip++;\r
 }\r
 /*should never exit here*/\r
 *outptr='\0';\r
 return outip;\r
}\r
\r
char *index_id(char *ip, int bitmask)\r
{ \r
 return very_ugly_ipv4_code(ip,bitmask,1);\r
}\r
\r
char *subnet_id(char *ip, int bitmask)\r
{\r
 return very_ugly_ipv4_code(ip,bitmask,0);\r
}\r