/* Copyright (C) 1998-99 Martin Baulig

   This file is part of LibGTop 1.0.

   Contributed by Martin Baulig <martin@home-of-linux.org>, October 1998.

   LibGTop 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.

   LibGTop 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 LibGTop; see the file COPYING. If not, write to the

   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

   Boston, MA 02110-1301, USA.

*/

#include <config.h>

#include <sys/socket.h>

#include <net/if.h>

#include <netinet/in.h>

#include <glibtop.h>

#include <glibtop/error.h>

#include <glibtop/netload.h>

#include "utils.h"

static const unsigned long _glibtop_sysdeps_netload =

(1 << GLIBTOP_NETLOAD_IF_FLAGS) + (1 << GLIBTOP_NETLOAD_MTU) +

(1 << GLIBTOP_NETLOAD_SUBNET) + (1 << GLIBTOP_NETLOAD_ADDRESS) +

(1 << GLIBTOP_NETLOAD_PACKETS_IN) + (1 << GLIBTOP_NETLOAD_PACKETS_OUT) +

(1 << GLIBTOP_NETLOAD_PACKETS_TOTAL) + (1 << GLIBTOP_NETLOAD_BYTES_IN) +

(1 << GLIBTOP_NETLOAD_BYTES_OUT) + (1 << GLIBTOP_NETLOAD_BYTES_TOTAL) +

(1 << GLIBTOP_NETLOAD_ERRORS_IN) + (1 << GLIBTOP_NETLOAD_ERRORS_OUT) +

(1 << GLIBTOP_NETLOAD_ERRORS_TOTAL) + (1 << GLIBTOP_NETLOAD_COLLISIONS);

static void get_ifaddr(glibtop* server, struct ifaddr* next, long* addr, long* mask)

{

	struct ifaddr ifaddr;

	struct sockaddr_in sockaddr;

	*addr = 0;

	*mask = 0;

	while (next)

	{

		/* get interface ifaddr structure */

		_glibtop_get_kmem_info(server, (off_t)next, &ifaddr, sizeof(ifaddr));

		/* get socket addr information */

		_glibtop_get_kmem_info( server, (off_t)ifaddr.ifa_addr

				     , &sockaddr, sizeof(sockaddr));

		/* if valid family : UDP, TCP, ...*/

		if (sockaddr.sin_family == AF_INET)

		{

			*addr = sockaddr.sin_addr.s_addr;

			_glibtop_get_kmem_info( server, (off_t)ifaddr.ifa_netmask

					     , &sockaddr, sizeof(sockaddr));

			*mask = sockaddr.sin_addr.s_addr;

			/* address found */

			return;

		}

		next = ifaddr.ifa_next;

	}

}

/* Init function. */

void

_glibtop_init_netload_p (glibtop *server)

{

	off_t result;

	off_t addr;

	result = _glibtop_get_kmem_offset(server, "ifnet");

	if (result <= 0)

	{

		server->sysdeps.netload = 0;

		return;

	}

	result = _glibtop_get_kmem_info(server, result, &addr, sizeof(addr));

	if (result <= 0)

	{

		server->sysdeps.netload = 0;

		return;

	}

	server->machine->ifnet_offset = addr;

	server->sysdeps.netload = _glibtop_sysdeps_netload;

}

/* Provides network statistics. */

void

glibtop_get_netload_p (glibtop *server, glibtop_netload *buf,

		       const char *interface)

{

	int result;

	off_t offset;

	struct ifnet ifnet;

	long addr;

	long mask;

	char name[16];

	glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_UPTIME), 0);

	memset (buf, 0, sizeof (glibtop_netload));

	for ( offset = server->machine->ifnet_offset;

	      offset != 0;

	      offset = (off_t)ifnet.if_next

	    )

	{

		result = _glibtop_get_kmem_info(server, offset,

						&ifnet, sizeof(ifnet));

		if (result <= 0)

		{

			glibtop_error_io_r (server, "Cannot read ifnet");

			return;

		}

		result = _glibtop_get_kmem_info(server, (off_t)ifnet.if_name,

						name, sizeof(name));

		if (result <= 0)

		{

			glibtop_error_io_r (server, "Cannot read if_name");

			return;

		}

		sprintf(name+strlen(name), "%d", ifnet.if_unit);

		if (strcmp(name, interface) != 0)

		{

			continue;

		}

		if (ifnet.if_flags & IFF_UP)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_UP);

		if (ifnet.if_flags & IFF_BROADCAST)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_BROADCAST);

		if (ifnet.if_flags & IFF_LOOPBACK)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_LOOPBACK);

		if (ifnet.if_flags & IFF_POINTOPOINT)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_POINTOPOINT);

		if (ifnet.if_flags & IFF_RUNNING)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_RUNNING);

		if (ifnet.if_flags & IFF_NOARP)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_NOARP);

		if (ifnet.if_flags & IFF_PROMISC)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_PROMISC);

		if (ifnet.if_flags & IFF_ALLMULTI)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_ALLMULTI);

		if (ifnet.if_flags & IFF_OACTIVE)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_OACTIVE);

		if (ifnet.if_flags & IFF_SIMPLEX)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_SIMPLEX);

		if (ifnet.if_flags & IFF_LINK0)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_LINK0);

		if (ifnet.if_flags & IFF_LINK1)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_LINK1);

		if (ifnet.if_flags & IFF_LINK2)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_LINK2);

		if (ifnet.if_flags & IFF_LINK2)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_LINK2);

		if (ifnet.if_flags & 0x80000)

			buf->if_flags |= (1 << GLIBTOP_IF_FLAGS_MULTICAST);

		buf->mtu = ifnet.if_mtu;

		get_ifaddr(server, ifnet.if_addrlist, &addr, &mask);

		buf->subnet = addr & mask;

		buf->address = addr;

		buf->packets_in = ifnet.if_ipackets;

		buf->packets_out = ifnet.if_opackets;

		buf->packets_total = buf->packets_in + buf->packets_out;

		buf->bytes_in = ifnet.if_ibytes;

		buf->bytes_out = ifnet.if_obytes;

		buf->bytes_total = buf->bytes_in + buf->bytes_out;

		buf->errors_in = ifnet.if_ierrors;

		buf->errors_out = ifnet.if_oerrors;

		buf->errors_total = ifnet.if_ierrors + ifnet.if_oerrors;

		buf->collisions = ifnet.if_collisions;

	}

	buf->flags = _glibtop_sysdeps_netload;

}