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/*
* (C) 2006-2008 by Pablo Neira Ayuso <pablo@netfilter.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include <string.h>
#include "fds.h"
/* we don't handle that many descriptors so eight is just fine */
#define FDS_ARRAY_LEN 8
#define FDS_ARRAY_SIZE (sizeof(int) * FDS_ARRAY_LEN)
struct fds *create_fds(void)
{
struct fds *fds;
fds = (struct fds *) malloc(sizeof(struct fds));
if (fds == NULL)
return NULL;
memset(fds, 0, sizeof(struct fds));
fds->fd_array = (int *) malloc(FDS_ARRAY_SIZE);
if (fds->fd_array == NULL) {
free(fds);
return NULL;
}
memset(fds->fd_array, 0, FDS_ARRAY_SIZE);
fds->fd_array_len = FDS_ARRAY_LEN;
return fds;
}
void destroy_fds(struct fds *fds)
{
free(fds->fd_array);
free(fds);
}
int register_fd(int fd, struct fds *fds)
{
FD_SET(fd, &fds->readfds);
if (fd > fds->maxfd)
fds->maxfd = fd;
if (fds->fd_array_cur >= fds->fd_array_len) {
fds->fd_array_len += FDS_ARRAY_LEN;
fds->fd_array = realloc(fds->fd_array,
fds->fd_array_len * sizeof(int));
if (fds->fd_array == NULL) {
fds->fd_array_len -= FDS_ARRAY_LEN;
return -1;
}
}
fds->fd_array[fds->fd_array_cur++] = fd;
return 0;
}
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