Broadcast forwarder for ip-bound gameservers
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/***************************************************************************
* Copyright (C) 07/2007 by Olaf Rempel *
* razzor@kopf-tisch.de *
* *
* 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; version 2 of the License *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int parse_sockaddr(const char *addr, struct sockaddr_in *sa)
{
char *buf = strdup(addr);
if (buf == NULL)
return -1;
char *tmp;
char *ipstr = strtok_r(buf, ":", &tmp);
if (ipstr == NULL) {
free(buf);
return -2;
}
sa->sin_family = AF_INET;
if (inet_pton(AF_INET, ipstr, &sa->sin_addr) <= 0) {
free(buf);
return -3;
}
char *portstr = strtok_r(NULL, " \r\n", &tmp);
if (portstr == NULL) {
free(buf);
return -4;
}
int port = atoi(portstr);
if (port < 0 || port > 65535) {
free(buf);
return -5;
}
sa->sin_port = htons(port);
free(buf);
return 0;
}
int parse_subnet(const char *addr, struct in_addr *net, struct in_addr *mask)
{
char *buf = strdup(addr);
if (buf == NULL)
return -1;
char *tmp;
char *netstr = strtok_r(buf, "/", &tmp);
if (netstr == NULL) {
free(buf);
return -2;
}
if (inet_pton(AF_INET, netstr, net) <= 0) {
free(buf);
return -3;
}
char *maskstr = strtok_r(NULL, " \r\n", &tmp);
if (maskstr == NULL) {
mask->s_addr = ~0;
} else if (inet_pton(AF_INET, maskstr, mask) <= 0) {
int maskbits = atoi(maskstr);
if (maskbits < 0 || maskbits > 32) {
free(buf);
return -4;
}
mask->s_addr = htonl(~0 << (32 - maskbits));
}
free(buf);
return 0;
}
int get_sockaddr(char *buf, int size, struct sockaddr_in *addr)
{
return snprintf(buf, size, "%s:%d", inet_ntoa(addr->sin_addr), ntohs(addr->sin_port));
}
char * get_sockaddr_buf(struct sockaddr_in *addr)
{
static char ret[24];
get_sockaddr(ret, sizeof(ret), addr);
return ret;
}
int same_sockaddr(struct sockaddr_in *a, struct sockaddr_in *b)
{
return !((a->sin_family ^ b->sin_family) |
(a->sin_addr.s_addr ^ b->sin_addr.s_addr) |
(a->sin_port ^ b->sin_port));
}