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coova-chilli

    1: /* 
    2:  *
    3:  * IP address pool functions.
    4:  * Copyright (C) 2003, 2004, 2005 Mondru AB.
    5:  * Copyright (c) 2006-2007 David Bird <david@coova.com>
    6:  * 
    7:  * The contents of this file may be used under the terms of the GNU
    8:  * General Public License Version 2, provided that the above copyright
    9:  * notice and this permission notice is included in all copies or
   10:  * substantial portions of the software.
   11:  * 
   12:  */
   13:  
   14: #include <sys/types.h>
   15: #include <netinet/in.h> /* in_addr */
   16: #include <stdlib.h>     /* calloc */
   17: #include <stdio.h>      /* sscanf */
   18: 
   19: #include "iphash.h"
   20: 
   21: /* Create new address pool hash */
   22: int iphash_new(struct ippool_t **this, struct ippoolm_t *list, int listsize) {
   23: 
   24:   int i;
   25: 
   26:   if (!(*this = calloc(sizeof(struct ippool_t), 1))) {
   27:     /* Failed to allocate memory for iphash */
   28:     return -1;
   29:   }
   30:   
   31:   (*this)->listsize = listsize;
   32:   (*this)->member = list;
   33: 
   34:   /* Determine log2 of hashsize */
   35:   for ((*this)->hashlog = 0; 
   36:        ((1 << (*this)->hashlog) < listsize);
   37:        (*this)->hashlog++);
   38:   
   39:   /* Determine hashsize */
   40:   (*this)->hashsize = 1 << (*this)->hashlog; /* Fails if mask=0: All Internet*/
   41:   (*this)->hashmask = (*this)->hashsize -1;
   42:   
   43:   /* Allocate hash table */
   44:   if (!((*this)->hash = calloc(sizeof(struct ippoolm_t), (*this)->hashsize))){
   45:     /* Failed to allocate memory for hash members in iphash */
   46:     return -1;
   47:   }
   48:   
   49:   for (i = 0; i<listsize; i++) {
   50:     
   51:     (*this)->member[i].inuse = 1; /* TODO */
   52:     ippool_hashadd(*this, &(*this)->member[i]);
   53:   }
   54: 
   55:   return 0;
   56: }
   57: 
   58: /* Delete existing address pool */
   59: int iphash_free(struct ippool_t *this) {
   60:   free(this->hash);
   61:   free(this);
   62:   return 0; /* Always OK */
   63: }