/*
* 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 .
*/
#include
#include
#include
#include
#include
GRUB_MOD_LICENSE ("GPLv3+");
struct grub_ofnetcard_data
{
char *path;
grub_ieee1275_ihandle_t handle;
grub_uint32_t mtu;
};
static grub_err_t
card_open (const struct grub_net_card *dev)
{
int status;
struct grub_ofnetcard_data *data = dev->data;
char path[grub_strlen (data->path) +
grub_strlen (":speed=auto,duplex=auto,1.1.1.1,dummy,1.1.1.1,1.1.1.1,5,5,1.1.1.1,512") + 1];
/* The full string will prevent a bootp packet to be sent. Just put some valid ip in there. */
grub_snprintf (path, sizeof (path), "%s%s", data->path,
":speed=auto,duplex=auto,1.1.1.1,dummy,1.1.1.1,1.1.1.1,5,5,1.1.1.1,512");
status = grub_ieee1275_open (path, &(data->handle));
if (status)
return grub_error (GRUB_ERR_IO, "Couldn't open network card.");
return GRUB_ERR_NONE;
}
static void
card_close (const 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 (const struct grub_net_card *dev, struct grub_net_buff *pack)
{
grub_ssize_t actual;
int status;
struct grub_ofnetcard_data *data = dev->data;
status = grub_ieee1275_write (data->handle, pack->data,
pack->tail - pack->data, &actual);
if (status)
return grub_error (GRUB_ERR_IO, "Couldn't send network packet.");
return GRUB_ERR_NONE;
}
static grub_ssize_t
get_card_packet (const struct grub_net_card *dev, struct grub_net_buff *nb)
{
grub_ssize_t actual;
int rc;
struct grub_ofnetcard_data *data = dev->data;
grub_uint64_t start_time;
grub_netbuff_clear (nb);
start_time = grub_get_time_ms ();
do
rc = grub_ieee1275_read (data->handle, nb->data, data->mtu, &actual);
while ((actual <= 0 || rc < 0) && (grub_get_time_ms () - start_time < 200));
if (actual)
{
grub_netbuff_put (nb, actual);
return actual;
}
return -1;
}
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
{
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 *cardpath;
char *canon;
grub_ssize_t size = -1;
unsigned int i;
if (card->driver != &ofdriver)
continue;
cardpath = ((struct grub_ofnetcard_data *) card->data)->path;
canon = grub_ieee1275_canonicalise_devname (cardpath);
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);
return;
}
}
static char *
find_alias (const char *fullname)
{
char *ret = NULL;
auto int find_alias_hook (struct grub_ieee1275_devalias *alias);
int find_alias_hook (struct grub_ieee1275_devalias *alias)
{
if (grub_strcmp (alias->path, fullname) == 0)
{
ret = grub_strdup (alias->name);
return 1;
}
return 0;
}
grub_devalias_iterate (find_alias_hook);
grub_errno = GRUB_ERR_NONE;
return ret;
}
static void
grub_ofnet_findcards (void)
{
auto int search_net_devices (struct grub_ieee1275_devalias *alias);
int search_net_devices (struct grub_ieee1275_devalias *alias)
{
if (!grub_strcmp (alias->type, "network"))
{
struct grub_ofnetcard_data *ofdata;
struct grub_net_card *card;
grub_ieee1275_phandle_t devhandle;
grub_net_link_level_address_t lla;
char *shortname;
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;
}
ofdata->path = grub_strdup (alias->path);
grub_ieee1275_finddevice (ofdata->path, &devhandle);
if (grub_ieee1275_get_integer_property
(devhandle, "max-frame-size", &(ofdata->mtu),
sizeof (ofdata->mtu), 0))
{
ofdata->mtu = 1500;
}
if (grub_ieee1275_get_property (devhandle, "mac-address",
&(lla.mac), 6, 0)
&& grub_ieee1275_get_property (devhandle, "local-mac-address",
&(lla.mac), 6, 0))
{
grub_error (GRUB_ERR_IO, "Couldn't retrieve mac address.");
grub_print_error ();
return 0;
}
lla.type = GRUB_NET_LINK_LEVEL_PROTOCOL_ETHERNET;
card->default_address = lla;
card->driver = NULL;
card->data = ofdata;
card->flags = 0;
shortname = find_alias (alias->path);
card->name = grub_xasprintf ("ofnet_%s", shortname ? : alias->path);
card->idle_poll_delay_ms = 1;
grub_free (shortname);
card->driver = &ofdriver;
grub_net_card_register (card);
return 0;
}
return 0;
}
/* 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;
}