/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2010,2011 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/net/netbuff.h>
#include <grub/ieee1275/ieee1275.h>
#include <grub/dl.h>
#include <grub/net.h>
#include <grub/time.h>
#include <grub/i18n.h>
GRUB_MOD_LICENSE ("GPLv3+");
struct grub_ofnetcard_data
{
char *path;
char *suffix;
grub_ieee1275_ihandle_t handle;
};
static grub_err_t
card_open (struct grub_net_card *dev)
{
int status;
struct grub_ofnetcard_data *data = dev->data;
status = grub_ieee1275_open (data->path, &(data->handle));
if (status)
return grub_error (GRUB_ERR_IO, "Couldn't open network card.");
return GRUB_ERR_NONE;
}
static void
card_close (struct grub_net_card *dev)
{
struct grub_ofnetcard_data *data = dev->data;
if (data->handle)
grub_ieee1275_close (data->handle);
}
static grub_err_t
send_card_buffer (struct grub_net_card *dev, struct grub_net_buff *pack)
{
grub_ssize_t actual;
int status;
struct grub_ofnetcard_data *data = dev->data;
grub_size_t len;
len = (pack->tail - pack->data);
if (len > dev->mtu)
len = dev->mtu;
grub_memcpy (dev->txbuf, pack->data, len);
status = grub_ieee1275_write (data->handle, dev->txbuf,
len, &actual);
if (status)
return grub_error (GRUB_ERR_IO, N_("couldn't send network packet"));
return GRUB_ERR_NONE;
}
static struct grub_net_buff *
get_card_packet (struct grub_net_card *dev)
{
grub_ssize_t actual;
int rc;
struct grub_ofnetcard_data *data = dev->data;
grub_uint64_t start_time;
struct grub_net_buff *nb;
nb = grub_netbuff_alloc (dev->mtu + 64 + 2);
if (!nb)
return NULL;
/* Reserve 2 bytes so that 2 + 14/18 bytes of ethernet header is divisible
by 4. So that IP header is aligned on 4 bytes. */
grub_netbuff_reserve (nb, 2);
start_time = grub_get_time_ms ();
do
rc = grub_ieee1275_read (data->handle, nb->data, dev->mtu + 64, &actual);
while ((actual <= 0 || rc < 0) && (grub_get_time_ms () - start_time < 200));
if (actual > 0)
{
grub_netbuff_put (nb, actual);
return nb;
}
grub_netbuff_free (nb);
return NULL;
}
static struct grub_net_card_driver ofdriver =
{
.name = "ofnet",
.open = card_open,
.close = card_close,
.send = send_card_buffer,
.recv = get_card_packet
};
static const struct
{
const char *name;
int offset;
}
bootp_response_properties[] =
{
{ .name = "bootp-response", .offset = 0},
{ .name = "dhcp-response", .offset = 0},
{ .name = "bootpreply-packet", .offset = 0x2a},
};
static void
grub_ieee1275_net_config_real (const char *devpath, char **device, char **path)
{
struct grub_net_card *card;
/* FIXME: Check that it's the right card. */
FOR_NET_CARDS (card)
{
char *bootp_response;
char *canon;
char c;
struct grub_ofnetcard_data *data;
grub_ssize_t size = -1;
unsigned int i;
if (card->driver != &ofdriver)
continue;
data = card->data;
c = *data->suffix;
*data->suffix = '\0';
canon = grub_ieee1275_canonicalise_devname (data->path);
*data->suffix = c;
if (grub_strcmp (devpath, canon) != 0)
{
grub_free (canon);
continue;
}
grub_free (canon);
for (i = 0; i < ARRAY_SIZE (bootp_response_properties); i++)
if (grub_ieee1275_get_property_length (grub_ieee1275_chosen,
bootp_response_properties[i].name,
&size) >= 0)
break;
if (size < 0)
return;
bootp_response = grub_malloc (size);
if (!bootp_response)
{
grub_print_error ();
return;
}
if (grub_ieee1275_get_property (grub_ieee1275_chosen,
bootp_response_properties[i].name,
bootp_response, size, 0) < 0)
return;
grub_net_configure_by_dhcp_ack (card->name, card, 0,
(struct grub_net_bootp_packet *)
(bootp_response
+ bootp_response_properties[i].offset),
size - bootp_response_properties[i].offset,
1, device, path);
grub_free (bootp_response);
return;
}
}
static int
search_net_devices (struct grub_ieee1275_devalias *alias)
{
struct grub_ofnetcard_data *ofdata;
struct grub_net_card *card;
grub_ieee1275_phandle_t devhandle;
grub_net_link_level_address_t lla;
grub_ssize_t prop_size;
grub_uint64_t prop;
grub_uint8_t *pprop;
char *shortname;
if (grub_strcmp (alias->type, "network") != 0)
return 0;
ofdata = grub_malloc (sizeof (struct grub_ofnetcard_data));
if (!ofdata)
{
grub_print_error ();
return 1;
}
card = grub_zalloc (sizeof (struct grub_net_card));
if (!card)
{
grub_free (ofdata);
grub_print_error ();
return 1;
}
#define SUFFIX ":speed=auto,duplex=auto,1.1.1.1,dummy,1.1.1.1,1.1.1.1,5,5,1.1.1.1,512"
if (!grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_NO_OFNET_SUFFIX))
ofdata->path = grub_malloc (grub_strlen (alias->path) + sizeof (SUFFIX));
else
ofdata->path = grub_malloc (grub_strlen (alias->path) + 1);
if (!ofdata->path)
{
grub_print_error ();
return 0;
}
ofdata->suffix = grub_stpcpy (ofdata->path, alias->path);
if (!grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_NO_OFNET_SUFFIX))
grub_memcpy (ofdata->suffix, SUFFIX, sizeof (SUFFIX));
else
*ofdata->suffix = '\0';
grub_ieee1275_finddevice (ofdata->path, &devhandle);
{
grub_uint32_t t;
if (grub_ieee1275_get_integer_property (devhandle,
"max-frame-size", &t,
sizeof (t), 0))
card->mtu = 1500;
else
card->mtu = t;
}
pprop = (grub_uint8_t *) ∝
if (grub_ieee1275_get_property (devhandle, "mac-address",
pprop, sizeof(prop), &prop_size)
&& grub_ieee1275_get_property (devhandle, "local-mac-address",
pprop, sizeof(prop), &prop_size))
{
grub_error (GRUB_ERR_IO, "Couldn't retrieve mac address.");
grub_print_error ();
return 0;
}
if (prop_size == 8)
grub_memcpy (&lla.mac, pprop+2, 6);
else
grub_memcpy (&lla.mac, pprop, 6);
lla.type = GRUB_NET_LINK_LEVEL_PROTOCOL_ETHERNET;
card->default_address = lla;
card->txbufsize = ALIGN_UP (card->mtu, 64) + 256;
if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_VIRT_TO_REAL_BROKEN))
{
struct alloc_args
{
struct grub_ieee1275_common_hdr common;
grub_ieee1275_cell_t method;
grub_ieee1275_cell_t len;
grub_ieee1275_cell_t catch;
grub_ieee1275_cell_t result;
}
args;
INIT_IEEE1275_COMMON (&args.common, "interpret", 2, 2);
args.len = card->txbufsize;
args.method = (grub_ieee1275_cell_t) "alloc-mem";
if (IEEE1275_CALL_ENTRY_FN (&args) == -1
|| args.catch)
{
card->txbuf = 0;
grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
}
else
card->txbuf = (void *) args.result;
}
else
card->txbuf = grub_zalloc (card->txbufsize);
if (!card->txbuf)
{
grub_free (ofdata->path);
grub_free (ofdata);
grub_free (card);
grub_print_error ();
return 0;
}
card->driver = NULL;
card->data = ofdata;
card->flags = 0;
shortname = grub_ieee1275_get_devname (alias->path);
card->name = grub_xasprintf ("ofnet_%s", shortname ? : alias->path);
card->idle_poll_delay_ms = 10;
grub_free (shortname);
card->driver = &ofdriver;
grub_net_card_register (card);
return 0;
}
static void
grub_ofnet_findcards (void)
{
/* Look at all nodes for devices of the type network. */
grub_ieee1275_devices_iterate (search_net_devices);
}
GRUB_MOD_INIT(ofnet)
{
grub_ofnet_findcards ();
grub_ieee1275_net_config = grub_ieee1275_net_config_real;
}
GRUB_MOD_FINI(ofnet)
{
struct grub_net_card *card, *next;
FOR_NET_CARDS_SAFE (card, next)
if (card->driver && grub_strcmp (card->driver->name, "ofnet") == 0)
grub_net_card_unregister (card);
grub_ieee1275_net_config = 0;
}