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ipxkern.c
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1996-02-01
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227 lines
/*
IPX support library - kernel dependent functions
Copyright (C) 1994, 1995 Ales Dryak <e-mail: A.Dryak@sh.cvut.cz>
Copyright (C) 1996, Volker Lendecke <lendecke@namu01.gwdg.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; 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 <errno.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <string.h>
#include <linux/route.h>
#include <netinet/in.h>
#include "ipxkern.h"
#define MAX_IFC (256)
static int
asc2frame(char *frame)
{
if (strcasecmp("etherii", frame) == 0)
return IPX_FRAME_ETHERII;
else if (strcasecmp("802.2", frame) == 0)
return IPX_FRAME_8022;
else if (strcasecmp("802.3", frame) == 0)
return IPX_FRAME_8023;
else if (strcasecmp("snap", frame) == 0)
return IPX_FRAME_SNAP;
else
return 0;
}
int
ipx_kern_scan_rtable(IPXrtScanFunc f, void *data)
{
FILE *ipx_route;
char buf[512];
ipx_route = fopen("/proc/net/ipx_route", "r");
if (ipx_route == NULL)
{
sprintf(ipx_err_string, "open ipx_route: %s",
strerror(errno));
return -1;
}
/* ignore header line */
fgets(buf, sizeof(buf), ipx_route);
while (fgets(buf, sizeof(buf), ipx_route) != NULL)
{
IPXNet network;
IPXNet router_net;
IPXNode router_node;
int type = 0;
if (strncmp(&(buf[11]), "Directly", 8) == 0)
{
if (ipx_sscanf_net(buf, &network) != 0)
{
fclose(ipx_route);
return -1;
}
router_net = 0;
memset(router_node, 0, sizeof(router_node));
}
else
{
type |= IPX_KRT_ROUTE;
if ( (ipx_sscanf_net(buf, &network) != 0)
|| (ipx_sscanf_net(&(buf[11]), &router_net) != 0)
|| (ipx_sscanf_node(&(buf[24]), router_node) != 0))
{
fclose(ipx_route);
return -1;
}
}
if (f(network, router_net, router_node, type, data) != 0)
{
fclose(ipx_route);
return 0;
}
}
fclose(ipx_route);
return 1;
}
int
ipx_kern_scan_ifaces(IPXifcScanFunc f, void *data)
{
FILE *ipx_ifc;
char buf[512];
ipx_ifc = fopen("/proc/net/ipx_interface", "r");
if (ipx_ifc == NULL)
{
sprintf(ipx_err_string, "open ipx_interface: %s",
strerror(errno));
return -1;
}
/* ignore header line */
fgets(buf, sizeof(buf), ipx_ifc);
while (fgets(buf, sizeof(buf), ipx_ifc) != NULL)
{
IPXNet network;
IPXNode node;
int type = 0;
char device[128];
int i;
int result;
type = asc2frame(&(buf[46]));
if (strncmp(&(buf[35]), "Internal", 8) == 0)
{
type |= IPX_KRT_INTERNAL;
}
if ( (ipx_sscanf_net(buf, &network) != 0)
|| (ipx_sscanf_node(&(buf[11]), node) != 0))
{
fclose(ipx_ifc);
return -1;
}
memset(device, 0, sizeof(device));
for (i = 0; i < sizeof(device)-1; i++)
{
if (buf[i+35] == ' ')
{
break;
}
device[i] = buf[i+35];
}
if ((result = f(network, node, device, type, data)) != 0)
{
fclose(ipx_ifc);
return result;
}
}
fclose(ipx_ifc);
return 0;
}
int
ipx_kern_route_add(int sock, IPXNet net, IPXNet rt_net, IPXNode rt_node)
{
struct rtentry rt;
struct sockaddr_ipx* sr;
struct sockaddr_ipx* st;
sr=(struct sockaddr_ipx*)&rt.rt_gateway;
st=(struct sockaddr_ipx*)&rt.rt_dst;
sr->sipx_family=st->sipx_family=AF_IPX;
st->sipx_network=htonl(net);
sr->sipx_network=htonl(rt_net);
ipx_assign_node(sr->sipx_node,rt_node);
rt.rt_flags=RTF_GATEWAY;
if(ioctl(sock,SIOCADDRT,(void *)&rt)!=0)
{
sprintf(ipx_err_string,"ioctl SIOCADDRT: %s",strerror(errno));
return -1;
}
return 0;
}
int
ipx_kern_route_delete(int sock, IPXNet net)
{
struct rtentry rt;
struct sockaddr_ipx* sr;
struct sockaddr_ipx* st;
sr=(struct sockaddr_ipx*)&rt.rt_gateway;
st=(struct sockaddr_ipx*)&rt.rt_dst;
sr->sipx_family=st->sipx_family=AF_IPX;
st->sipx_network=htonl(net);
rt.rt_flags=RTF_GATEWAY;
if(ioctl(sock,SIOCDELRT,(void *)&rt)!=0)
{
sprintf(ipx_err_string,"ioctl SIOCDELRT: %s",strerror(errno));
return -1;
}
return 0;
}
int
ipx_kern_enable_broadcast(int sock)
{
int opt=1;
/* Permit broadcast output */
if(setsockopt(sock,SOL_SOCKET,SO_BROADCAST, &opt,sizeof(opt))==-1)
{
sprintf(ipx_err_string,"setsockopt SO_BROADCAST: %s",
strerror(errno));
return -1;
}
return 0;
}