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grub/grub-core/net/net.c
Josef Bacik eb9f401fc1 net: fix ipv6 routing 
ipv6 routing in grub2 is broken, we cannot talk to anything outside our local
network or anything that doesn't route in our global namespace.  This patch
fixes this by doing a couple of things

1) Read the router information off of the router advertisement.  If we have a
router lifetime we need to take the source address and create a route from it.

2) Changes the routing stuff slightly to allow you to specify a gateway _and_ an
interface.  Since the router advertisements come in on the link local address we
need to associate it with the global address on the card.  So when we are
processing the router advertisement, either use the SLAAC interface we create
and add the route to that interface, or loop through the global addresses we
currently have on our interface and associate it with one of those addresses.
We need to have a special case here for the default route so that it gets used,
we do this by setting the masksize to 0 to mean it encompasses all networks.
The routing code will automatically select the best route so if there is a
closer match we will use that.

With this patch I can now talk to ipv6 addresses outside of my local network.
Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
2016-02-25 22:38:52 +03:00

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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2010,2011,2012,2013 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.h>
#include <grub/net/netbuff.h>
#include <grub/time.h>
#include <grub/file.h>
#include <grub/i18n.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/dl.h>
#include <grub/command.h>
#include <grub/env.h>
#include <grub/net/ethernet.h>
#include <grub/net/arp.h>
#include <grub/net/ip.h>
#include <grub/loader.h>
#include <grub/bufio.h>
#include <grub/kernel.h>
GRUB_MOD_LICENSE ("GPLv3+");
char *grub_net_default_server;
struct grub_net_route *grub_net_routes = NULL;
struct grub_net_network_level_interface *grub_net_network_level_interfaces = NULL;
struct grub_net_card *grub_net_cards = NULL;
struct grub_net_network_level_protocol *grub_net_network_level_protocols = NULL;
static struct grub_fs grub_net_fs;
struct grub_net_link_layer_entry {
int avail;
grub_net_network_level_address_t nl_address;
grub_net_link_level_address_t ll_address;
};
#define LINK_LAYER_CACHE_SIZE 256
static struct grub_net_link_layer_entry *
link_layer_find_entry (const grub_net_network_level_address_t *proto,
const struct grub_net_card *card)
{
unsigned i;
if (!card->link_layer_table)
return NULL;
for (i = 0; i < LINK_LAYER_CACHE_SIZE; i++)
{
if (card->link_layer_table[i].avail == 1
&& grub_net_addr_cmp (&card->link_layer_table[i].nl_address,
proto) == 0)
return &card->link_layer_table[i];
}
return NULL;
}
void
grub_net_link_layer_add_address (struct grub_net_card *card,
const grub_net_network_level_address_t *nl,
const grub_net_link_level_address_t *ll,
int override)
{
struct grub_net_link_layer_entry *entry;
/* Check if the sender is in the cache table. */
entry = link_layer_find_entry (nl, card);
/* Update sender hardware address. */
if (entry && override)
grub_memcpy (&entry->ll_address, ll, sizeof (entry->ll_address));
if (entry)
return;
/* Add sender to cache table. */
if (card->link_layer_table == NULL)
card->link_layer_table = grub_zalloc (LINK_LAYER_CACHE_SIZE
* sizeof (card->link_layer_table[0]));
entry = &(card->link_layer_table[card->new_ll_entry]);
entry->avail = 1;
grub_memcpy (&entry->ll_address, ll, sizeof (entry->ll_address));
grub_memcpy (&entry->nl_address, nl, sizeof (entry->nl_address));
card->new_ll_entry++;
if (card->new_ll_entry == LINK_LAYER_CACHE_SIZE)
card->new_ll_entry = 0;
}
int
grub_net_link_layer_resolve_check (struct grub_net_network_level_interface *inf,
const grub_net_network_level_address_t *proto_addr)
{
struct grub_net_link_layer_entry *entry;
if (proto_addr->type == GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV4
&& proto_addr->ipv4 == 0xffffffff)
return 1;
entry = link_layer_find_entry (proto_addr, inf->card);
if (entry)
return 1;
return 0;
}
grub_err_t
grub_net_link_layer_resolve (struct grub_net_network_level_interface *inf,
const grub_net_network_level_address_t *proto_addr,
grub_net_link_level_address_t *hw_addr)
{
struct grub_net_link_layer_entry *entry;
grub_err_t err;
if ((proto_addr->type == GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV4
&& proto_addr->ipv4 == 0xffffffff)
|| proto_addr->type == GRUB_NET_NETWORK_LEVEL_PROTOCOL_DHCP_RECV
|| (proto_addr->type == GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6
&& proto_addr->ipv6[0] == grub_be_to_cpu64_compile_time (0xff02ULL
<< 48)
&& proto_addr->ipv6[1] == (grub_be_to_cpu64_compile_time (1))))
{
hw_addr->type = GRUB_NET_LINK_LEVEL_PROTOCOL_ETHERNET;
grub_memset (hw_addr->mac, -1, 6);
return GRUB_ERR_NONE;
}
if (proto_addr->type == GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6
&& ((grub_be_to_cpu64 (proto_addr->ipv6[0]) >> 56) == 0xff))
{
hw_addr->type = GRUB_NET_LINK_LEVEL_PROTOCOL_ETHERNET;
hw_addr->mac[0] = 0x33;
hw_addr->mac[1] = 0x33;
hw_addr->mac[2] = ((grub_be_to_cpu64 (proto_addr->ipv6[1]) >> 24) & 0xff);
hw_addr->mac[3] = ((grub_be_to_cpu64 (proto_addr->ipv6[1]) >> 16) & 0xff);
hw_addr->mac[4] = ((grub_be_to_cpu64 (proto_addr->ipv6[1]) >> 8) & 0xff);
hw_addr->mac[5] = ((grub_be_to_cpu64 (proto_addr->ipv6[1]) >> 0) & 0xff);
return GRUB_ERR_NONE;
}
/* Check cache table. */
entry = link_layer_find_entry (proto_addr, inf->card);
if (entry)
{
*hw_addr = entry->ll_address;
return GRUB_ERR_NONE;
}
switch (proto_addr->type)
{
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV4:
err = grub_net_arp_send_request (inf, proto_addr);
break;
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6:
err = grub_net_icmp6_send_request (inf, proto_addr);
break;
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_DHCP_RECV:
return grub_error (GRUB_ERR_BUG, "shouldn't reach here");
default:
return grub_error (GRUB_ERR_BUG,
"unsupported address type %d", proto_addr->type);
}
if (err)
return err;
entry = link_layer_find_entry (proto_addr, inf->card);
if (entry)
{
*hw_addr = entry->ll_address;
return GRUB_ERR_NONE;
}
return grub_error (GRUB_ERR_TIMEOUT,
N_("timeout: could not resolve hardware address"));
}
void
grub_net_card_unregister (struct grub_net_card *card)
{
struct grub_net_network_level_interface *inf, *next;
FOR_NET_NETWORK_LEVEL_INTERFACES_SAFE(inf, next)
if (inf->card == card)
grub_net_network_level_interface_unregister (inf);
if (card->opened)
{
if (card->driver->close)
card->driver->close (card);
card->opened = 0;
}
grub_list_remove (GRUB_AS_LIST (card));
}
static struct grub_net_slaac_mac_list *
grub_net_ipv6_get_slaac (struct grub_net_card *card,
const grub_net_link_level_address_t *hwaddr)
{
struct grub_net_slaac_mac_list *slaac;
char *ptr;
for (slaac = card->slaac_list; slaac; slaac = slaac->next)
if (grub_net_hwaddr_cmp (&slaac->address, hwaddr) == 0)
return slaac;
slaac = grub_zalloc (sizeof (*slaac));
if (!slaac)
return NULL;
slaac->name = grub_malloc (grub_strlen (card->name)
+ GRUB_NET_MAX_STR_HWADDR_LEN
+ sizeof (":slaac"));
ptr = grub_stpcpy (slaac->name, card->name);
if (grub_net_hwaddr_cmp (&card->default_address, hwaddr) != 0)
{
ptr = grub_stpcpy (ptr, ":");
grub_net_hwaddr_to_str (hwaddr, ptr);
ptr += grub_strlen (ptr);
}
ptr = grub_stpcpy (ptr, ":slaac");
grub_memcpy (&slaac->address, hwaddr, sizeof (slaac->address));
slaac->next = card->slaac_list;
card->slaac_list = slaac;
return slaac;
}
static void
grub_net_network_level_interface_register (struct grub_net_network_level_interface *inter);
static struct grub_net_network_level_interface *
grub_net_add_addr_real (char *name,
struct grub_net_card *card,
const grub_net_network_level_address_t *addr,
const grub_net_link_level_address_t *hwaddress,
grub_net_interface_flags_t flags)
{
struct grub_net_network_level_interface *inter;
inter = grub_zalloc (sizeof (*inter));
if (!inter)
return NULL;
inter->name = name;
grub_memcpy (&(inter->address), addr, sizeof (inter->address));
grub_memcpy (&(inter->hwaddress), hwaddress, sizeof (inter->hwaddress));
inter->flags = flags;
inter->card = card;
inter->dhcp_ack = NULL;
inter->dhcp_acklen = 0;
grub_net_network_level_interface_register (inter);
return inter;
}
struct grub_net_network_level_interface *
grub_net_add_addr (const char *name,
struct grub_net_card *card,
const grub_net_network_level_address_t *addr,
const grub_net_link_level_address_t *hwaddress,
grub_net_interface_flags_t flags)
{
char *name_dup = grub_strdup (name);
struct grub_net_network_level_interface *ret;
if (!name_dup)
return NULL;
ret = grub_net_add_addr_real (name_dup, card, addr, hwaddress, flags);
if (!ret)
grub_free (name_dup);
return ret;
}
struct grub_net_network_level_interface *
grub_net_ipv6_get_link_local (struct grub_net_card *card,
const grub_net_link_level_address_t *hwaddr)
{
struct grub_net_network_level_interface *inf;
char *name;
char *ptr;
grub_net_network_level_address_t addr;
addr.type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6;
addr.ipv6[0] = grub_cpu_to_be64_compile_time (0xfe80ULL << 48);
addr.ipv6[1] = grub_net_ipv6_get_id (hwaddr);
FOR_NET_NETWORK_LEVEL_INTERFACES (inf)
{
if (inf->card == card
&& grub_net_hwaddr_cmp (&inf->hwaddress, hwaddr) == 0
&& grub_net_addr_cmp (&inf->address, &addr) == 0)
return inf;
}
name = grub_malloc (grub_strlen (card->name)
+ GRUB_NET_MAX_STR_HWADDR_LEN
+ sizeof (":link"));
if (!name)
return NULL;
ptr = grub_stpcpy (name, card->name);
if (grub_net_hwaddr_cmp (&card->default_address, hwaddr) != 0)
{
ptr = grub_stpcpy (ptr, ":");
grub_net_hwaddr_to_str (hwaddr, ptr);
ptr += grub_strlen (ptr);
}
ptr = grub_stpcpy (ptr, ":link");
return grub_net_add_addr_real (name, card, &addr, hwaddr, 0);
}
/* FIXME: allow to specify mac address. */
static grub_err_t
grub_cmd_ipv6_autoconf (struct grub_command *cmd __attribute__ ((unused)),
int argc, char **args)
{
struct grub_net_card *card;
struct grub_net_network_level_interface **ifaces;
grub_size_t ncards = 0;
unsigned j = 0;
int interval;
grub_err_t err;
struct grub_net_slaac_mac_list **slaacs;
FOR_NET_CARDS (card)
{
if (argc > 0 && grub_strcmp (card->name, args[0]) != 0)
continue;
ncards++;
}
ifaces = grub_zalloc (ncards * sizeof (ifaces[0]));
slaacs = grub_zalloc (ncards * sizeof (slaacs[0]));
if (!ifaces || !slaacs)
{
grub_free (ifaces);
grub_free (slaacs);
return grub_errno;
}
FOR_NET_CARDS (card)
{
if (argc > 0 && grub_strcmp (card->name, args[0]) != 0)
continue;
ifaces[j] = grub_net_ipv6_get_link_local (card, &card->default_address);
if (!ifaces[j])
{
grub_free (ifaces);
grub_free (slaacs);
return grub_errno;
}
slaacs[j] = grub_net_ipv6_get_slaac (card, &card->default_address);
if (!slaacs[j])
{
grub_free (ifaces);
grub_free (slaacs);
return grub_errno;
}
j++;
}
for (interval = 200; interval < 10000; interval *= 2)
{
int done = 1;
for (j = 0; j < ncards; j++)
{
if (slaacs[j]->slaac_counter)
continue;
err = grub_net_icmp6_send_router_solicit (ifaces[j]);
if (err)
err = GRUB_ERR_NONE;
done = 0;
}
if (done)
break;
grub_net_poll_cards (interval, 0);
}
err = GRUB_ERR_NONE;
for (j = 0; j < ncards; j++)
{
if (slaacs[j]->slaac_counter)
continue;
err = grub_error (GRUB_ERR_FILE_NOT_FOUND,
N_("couldn't autoconfigure %s"),
ifaces[j]->card->name);
}
grub_free (ifaces);
grub_free (slaacs);
return err;
}
static int
parse_ip (const char *val, grub_uint32_t *ip, const char **rest)
{
grub_uint32_t newip = 0;
int i;
const char *ptr = val;
for (i = 0; i < 4; i++)
{
unsigned long t;
t = grub_strtoul (ptr, (char **) &ptr, 0);
if (grub_errno)
{
grub_errno = GRUB_ERR_NONE;
return 0;
}
if (*ptr != '.' && i == 0)
{
newip = t;
break;
}
if (t & ~0xff)
return 0;
newip >>= 8;
newip |= (t << 24);
if (i != 3 && *ptr != '.')
return 0;
ptr++;
}
*ip = grub_cpu_to_le32 (newip);
if (rest)
*rest = (ptr - 1);
return 1;
}
static int
parse_ip6 (const char *val, grub_uint64_t *ip, const char **rest)
{
grub_uint16_t newip[8];
const char *ptr = val;
int word, quaddot = -1;
if (ptr[0] == ':' && ptr[1] != ':')
return 0;
if (ptr[0] == ':')
ptr++;
for (word = 0; word < 8; word++)
{
unsigned long t;
if (*ptr == ':')
{
quaddot = word;
word--;
ptr++;
continue;
}
t = grub_strtoul (ptr, (char **) &ptr, 16);
if (grub_errno)
{
grub_errno = GRUB_ERR_NONE;
break;
}
if (t & ~0xffff)
return 0;
newip[word] = grub_cpu_to_be16 (t);
if (*ptr != ':')
break;
ptr++;
}
if (quaddot == -1 && word < 7)
return 0;
if (quaddot != -1)
{
grub_memmove (&newip[quaddot + 7 - word], &newip[quaddot],
(word - quaddot + 1) * sizeof (newip[0]));
grub_memset (&newip[quaddot], 0, (7 - word) * sizeof (newip[0]));
}
grub_memcpy (ip, newip, 16);
if (rest)
*rest = ptr;
return 1;
}
static int
match_net (const grub_net_network_level_netaddress_t *net,
const grub_net_network_level_address_t *addr)
{
if (net->type != addr->type)
return 0;
switch (net->type)
{
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_DHCP_RECV:
return 0;
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV4:
{
grub_uint32_t mask = (0xffffffffU << (32 - net->ipv4.masksize));
if (net->ipv4.masksize == 0)
mask = 0;
return ((grub_be_to_cpu32 (net->ipv4.base) & mask)
== (grub_be_to_cpu32 (addr->ipv4) & mask));
}
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6:
{
grub_uint64_t mask[2];
if (net->ipv6.masksize == 0)
return 1;
if (net->ipv6.masksize <= 64)
{
mask[0] = 0xffffffffffffffffULL << (64 - net->ipv6.masksize);
mask[1] = 0;
}
else
{
mask[0] = 0xffffffffffffffffULL;
mask[1] = 0xffffffffffffffffULL << (128 - net->ipv6.masksize);
}
return (((grub_be_to_cpu64 (net->ipv6.base[0]) & mask[0])
== (grub_be_to_cpu64 (addr->ipv6[0]) & mask[0]))
&& ((grub_be_to_cpu64 (net->ipv6.base[1]) & mask[1])
== (grub_be_to_cpu64 (addr->ipv6[1]) & mask[1])));
}
}
return 0;
}
grub_err_t
grub_net_resolve_address (const char *name,
grub_net_network_level_address_t *addr)
{
const char *rest;
grub_err_t err;
grub_size_t naddresses;
struct grub_net_network_level_address *addresses = 0;
if (parse_ip (name, &addr->ipv4, &rest) && *rest == 0)
{
addr->type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV4;
return GRUB_ERR_NONE;
}
if (parse_ip6 (name, addr->ipv6, &rest) && *rest == 0)
{
addr->type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6;
return GRUB_ERR_NONE;
}
err = grub_net_dns_lookup (name, 0, 0, &naddresses, &addresses, 1);
if (err)
return err;
if (!naddresses)
grub_error (GRUB_ERR_NET_BAD_ADDRESS, N_("unresolvable address %s"),
name);
/* FIXME: use other results as well. */
*addr = addresses[0];
grub_free (addresses);
return GRUB_ERR_NONE;
}
grub_err_t
grub_net_resolve_net_address (const char *name,
grub_net_network_level_netaddress_t *addr)
{
const char *rest;
if (parse_ip (name, &addr->ipv4.base, &rest))
{
addr->type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV4;
if (*rest == '/')
{
addr->ipv4.masksize = grub_strtoul (rest + 1, (char **) &rest, 0);
if (!grub_errno && *rest == 0)
return GRUB_ERR_NONE;
grub_errno = GRUB_ERR_NONE;
}
else if (*rest == 0)
{
addr->ipv4.masksize = 32;
return GRUB_ERR_NONE;
}
}
if (parse_ip6 (name, addr->ipv6.base, &rest))
{
addr->type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6;
if (*rest == '/')
{
addr->ipv6.masksize = grub_strtoul (rest + 1, (char **) &rest, 0);
if (!grub_errno && *rest == 0)
return GRUB_ERR_NONE;
grub_errno = GRUB_ERR_NONE;
}
else if (*rest == 0)
{
addr->ipv6.masksize = 128;
return GRUB_ERR_NONE;
}
}
return grub_error (GRUB_ERR_NET_BAD_ADDRESS,
N_("unrecognised network address `%s'"),
name);
}
static int
route_cmp (const struct grub_net_route *a, const struct grub_net_route *b)
{
if (a == NULL && b == NULL)
return 0;
if (b == NULL)
return +1;
if (a == NULL)
return -1;
if (a->target.type < b->target.type)
return -1;
if (a->target.type > b->target.type)
return +1;
switch (a->target.type)
{
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_DHCP_RECV:
break;
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6:
if (a->target.ipv6.masksize > b->target.ipv6.masksize)
return +1;
if (a->target.ipv6.masksize < b->target.ipv6.masksize)
return -1;
break;
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV4:
if (a->target.ipv4.masksize > b->target.ipv4.masksize)
return +1;
if (a->target.ipv4.masksize < b->target.ipv4.masksize)
return -1;
break;
}
return 0;
}
grub_err_t
grub_net_route_address (grub_net_network_level_address_t addr,
grub_net_network_level_address_t *gateway,
struct grub_net_network_level_interface **interf)
{
struct grub_net_route *route;
unsigned int depth = 0;
unsigned int routecnt = 0;
struct grub_net_network_level_protocol *prot = NULL;
grub_net_network_level_address_t curtarget = addr;
*gateway = addr;
FOR_NET_ROUTES(route)
routecnt++;
for (depth = 0; depth < routecnt + 2 && depth < GRUB_UINT_MAX; depth++)
{
struct grub_net_route *bestroute = NULL;
FOR_NET_ROUTES(route)
{
if (depth && prot != route->prot)
continue;
if (!match_net (&route->target, &curtarget))
continue;
if (route_cmp (route, bestroute) > 0)
bestroute = route;
}
if (bestroute == NULL)
return grub_error (GRUB_ERR_NET_NO_ROUTE,
N_("destination unreachable"));
if (!bestroute->is_gateway)
{
*interf = bestroute->interface;
return GRUB_ERR_NONE;
}
if (depth == 0)
{
*gateway = bestroute->gw;
if (bestroute->interface != NULL)
{
*interf = bestroute->interface;
return GRUB_ERR_NONE;
}
}
curtarget = bestroute->gw;
}
return grub_error (GRUB_ERR_NET_ROUTE_LOOP,
/* TRANSLATORS: route loop is a condition when e.g.
to contact server A you need to go through B
and to contact B you need to go through A. */
N_("route loop detected"));
}
static grub_err_t
grub_cmd_deladdr (struct grub_command *cmd __attribute__ ((unused)),
int argc, char **args)
{
struct grub_net_network_level_interface *inter;
if (argc != 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("one argument expected"));
FOR_NET_NETWORK_LEVEL_INTERFACES (inter)
if (grub_strcmp (inter->name, args[0]) == 0)
break;
if (inter == NULL)
return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("address not found"));
if (inter->flags & GRUB_NET_INTERFACE_PERMANENT)
return grub_error (GRUB_ERR_IO,
N_("you can't delete this address"));
grub_net_network_level_interface_unregister (inter);
grub_free (inter->name);
grub_free (inter);
return GRUB_ERR_NONE;
}
void
grub_net_addr_to_str (const grub_net_network_level_address_t *target, char *buf)
{
switch (target->type)
{
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_DHCP_RECV:
COMPILE_TIME_ASSERT (sizeof ("temporary") < GRUB_NET_MAX_STR_ADDR_LEN);
grub_strcpy (buf, "temporary");
return;
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6:
{
char *ptr = buf;
grub_uint64_t n = grub_be_to_cpu64 (target->ipv6[0]);
int i;
for (i = 0; i < 4; i++)
{
grub_snprintf (ptr, 6, "%" PRIxGRUB_UINT64_T ":",
(n >> (48 - 16 * i)) & 0xffff);
ptr += grub_strlen (ptr);
}
n = grub_be_to_cpu64 (target->ipv6[1]);
for (i = 0; i < 3; i++)
{
grub_snprintf (ptr, 6, "%" PRIxGRUB_UINT64_T ":",
(n >> (48 - 16 * i)) & 0xffff);
ptr += grub_strlen (ptr);
}
grub_snprintf (ptr, 5, "%" PRIxGRUB_UINT64_T, n & 0xffff);
return;
}
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV4:
{
grub_uint32_t n = grub_be_to_cpu32 (target->ipv4);
grub_snprintf (buf, GRUB_NET_MAX_STR_ADDR_LEN, "%d.%d.%d.%d",
((n >> 24) & 0xff), ((n >> 16) & 0xff),
((n >> 8) & 0xff), ((n >> 0) & 0xff));
}
return;
}
grub_snprintf (buf, GRUB_NET_MAX_STR_ADDR_LEN,
"Unknown address type %d", target->type);
}
void
grub_net_hwaddr_to_str (const grub_net_link_level_address_t *addr, char *str)
{
str[0] = 0;
switch (addr->type)
{
case GRUB_NET_LINK_LEVEL_PROTOCOL_ETHERNET:
{
char *ptr;
unsigned i;
for (ptr = str, i = 0; i < ARRAY_SIZE (addr->mac); i++)
{
grub_snprintf (ptr, GRUB_NET_MAX_STR_HWADDR_LEN - (ptr - str),
"%02x:", addr->mac[i] & 0xff);
ptr += (sizeof ("XX:") - 1);
}
return;
}
}
grub_printf (_("Unsupported hw address type %d\n"), addr->type);
}
int
grub_net_hwaddr_cmp (const grub_net_link_level_address_t *a,
const grub_net_link_level_address_t *b)
{
if (a->type < b->type)
return -1;
if (a->type > b->type)
return +1;
switch (a->type)
{
case GRUB_NET_LINK_LEVEL_PROTOCOL_ETHERNET:
return grub_memcmp (a->mac, b->mac, sizeof (a->mac));
}
grub_printf (_("Unsupported hw address type %d\n"), a->type);
return 1;
}
int
grub_net_addr_cmp (const grub_net_network_level_address_t *a,
const grub_net_network_level_address_t *b)
{
if (a->type < b->type)
return -1;
if (a->type > b->type)
return +1;
switch (a->type)
{
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV4:
return grub_memcmp (&a->ipv4, &b->ipv4, sizeof (a->ipv4));
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6:
return grub_memcmp (&a->ipv6, &b->ipv6, sizeof (a->ipv6));
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_DHCP_RECV:
return 0;
}
grub_printf (_("Unsupported address type %d\n"), a->type);
return 1;
}
/* FIXME: implement this. */
static char *
hwaddr_set_env (struct grub_env_var *var __attribute__ ((unused)),
const char *val __attribute__ ((unused)))
{
return NULL;
}
/* FIXME: implement this. */
static char *
addr_set_env (struct grub_env_var *var __attribute__ ((unused)),
const char *val __attribute__ ((unused)))
{
return NULL;
}
static char *
defserver_set_env (struct grub_env_var *var __attribute__ ((unused)),
const char *val)
{
grub_free (grub_net_default_server);
grub_net_default_server = grub_strdup (val);
return grub_strdup (val);
}
static const char *
defserver_get_env (struct grub_env_var *var __attribute__ ((unused)),
const char *val __attribute__ ((unused)))
{
return grub_net_default_server ? : "";
}
static const char *
defip_get_env (struct grub_env_var *var __attribute__ ((unused)),
const char *val __attribute__ ((unused)))
{
const char *intf = grub_env_get ("net_default_interface");
const char *ret = NULL;
if (intf)
{
char *buf = grub_xasprintf ("net_%s_ip", intf);
if (buf)
ret = grub_env_get (buf);
grub_free (buf);
}
return ret;
}
static char *
defip_set_env (struct grub_env_var *var __attribute__ ((unused)),
const char *val)
{
const char *intf = grub_env_get ("net_default_interface");
if (intf)
{
char *buf = grub_xasprintf ("net_%s_ip", intf);
if (buf)
grub_env_set (buf, val);
grub_free (buf);
}
return NULL;
}
static const char *
defmac_get_env (struct grub_env_var *var __attribute__ ((unused)),
const char *val __attribute__ ((unused)))
{
const char *intf = grub_env_get ("net_default_interface");
const char *ret = NULL;
if (intf)
{
char *buf = grub_xasprintf ("net_%s_mac", intf);
if (buf)
ret = grub_env_get (buf);
grub_free (buf);
}
return ret;
}
static char *
defmac_set_env (struct grub_env_var *var __attribute__ ((unused)),
const char *val)
{
const char *intf = grub_env_get ("net_default_interface");
if (intf)
{
char *buf = grub_xasprintf ("net_%s_mac", intf);
if (buf)
grub_env_set (buf, val);
grub_free (buf);
}
return NULL;
}
static void
grub_net_network_level_interface_register (struct grub_net_network_level_interface *inter)
{
{
char buf[GRUB_NET_MAX_STR_HWADDR_LEN];
char *name;
char *ptr;
grub_net_hwaddr_to_str (&inter->hwaddress, buf);
name = grub_xasprintf ("net_%s_mac", inter->name);
if (!name)
return;
for (ptr = name; *ptr; ptr++)
if (*ptr == ':')
*ptr = '_';
grub_env_set (name, buf);
grub_register_variable_hook (name, 0, hwaddr_set_env);
grub_env_export (name);
grub_free (name);
}
{
char buf[GRUB_NET_MAX_STR_ADDR_LEN];
char *name;
char *ptr;
grub_net_addr_to_str (&inter->address, buf);
name = grub_xasprintf ("net_%s_ip", inter->name);
if (!name)
return;
for (ptr = name; *ptr; ptr++)
if (*ptr == ':')
*ptr = '_';
grub_env_set (name, buf);
grub_register_variable_hook (name, 0, addr_set_env);
grub_env_export (name);
grub_free (name);
}
inter->card->num_ifaces++;
inter->prev = &grub_net_network_level_interfaces;
inter->next = grub_net_network_level_interfaces;
if (inter->next)
inter->next->prev = &inter->next;
grub_net_network_level_interfaces = inter;
}
grub_err_t
grub_net_add_ipv4_local (struct grub_net_network_level_interface *inter,
int mask)
{
grub_uint32_t ip_cpu;
struct grub_net_route *route;
if (inter->address.type != GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV4)
return 0;
ip_cpu = grub_be_to_cpu32 (inter->address.ipv4);
if (mask == -1)
{
if (!(ip_cpu & 0x80000000))
mask = 8;
else if (!(ip_cpu & 0x40000000))
mask = 16;
else if (!(ip_cpu & 0x20000000))
mask = 24;
}
if (mask == -1)
return 0;
route = grub_zalloc (sizeof (*route));
if (!route)
return grub_errno;
route->name = grub_xasprintf ("%s:local", inter->name);
if (!route->name)
{
grub_free (route);
return grub_errno;
}
route->target.type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV4;
route->target.ipv4.base = grub_cpu_to_be32 (ip_cpu & (0xffffffff << (32 - mask)));
route->target.ipv4.masksize = mask;
route->is_gateway = 0;
route->interface = inter;
grub_net_route_register (route);
return 0;
}
/* FIXME: support MAC specifying. */
static grub_err_t
grub_cmd_addaddr (struct grub_command *cmd __attribute__ ((unused)),
int argc, char **args)
{
struct grub_net_card *card;
grub_net_network_level_address_t addr;
grub_err_t err;
grub_net_interface_flags_t flags = 0;
struct grub_net_network_level_interface *inf;
if (argc != 3)
return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("three arguments expected"));
FOR_NET_CARDS (card)
if (grub_strcmp (card->name, args[1]) == 0)
break;
if (card == NULL)
return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("card not found"));
err = grub_net_resolve_address (args[2], &addr);
if (err)
return err;
if (card->flags & GRUB_NET_CARD_NO_MANUAL_INTERFACES)
return grub_error (GRUB_ERR_IO,
"this card doesn't support address addition");
if (card->flags & GRUB_NET_CARD_HWADDRESS_IMMUTABLE)
flags |= GRUB_NET_INTERFACE_HWADDRESS_IMMUTABLE;
inf = grub_net_add_addr (args[0], card, &addr, &card->default_address,
flags);
if (inf)
grub_net_add_ipv4_local (inf, -1);
return grub_errno;
}
static grub_err_t
grub_cmd_delroute (struct grub_command *cmd __attribute__ ((unused)),
int argc, char **args)
{
struct grub_net_route *route;
struct grub_net_route **prev;
if (argc != 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("one argument expected"));
for (prev = &grub_net_routes, route = *prev; route; prev = &((*prev)->next),
route = *prev)
if (grub_strcmp (route->name, args[0]) == 0)
{
*prev = route->next;
grub_free (route->name);
grub_free (route);
if (!*prev)
break;
}
return GRUB_ERR_NONE;
}
grub_err_t
grub_net_add_route (const char *name,
grub_net_network_level_netaddress_t target,
struct grub_net_network_level_interface *inter)
{
struct grub_net_route *route;
route = grub_zalloc (sizeof (*route));
if (!route)
return grub_errno;
route->name = grub_strdup (name);
if (!route->name)
{
grub_free (route);
return grub_errno;
}
route->target = target;
route->is_gateway = 0;
route->interface = inter;
grub_net_route_register (route);
return GRUB_ERR_NONE;
}
grub_err_t
grub_net_add_route_gw (const char *name,
grub_net_network_level_netaddress_t target,
grub_net_network_level_address_t gw,
struct grub_net_network_level_interface *inter)
{
struct grub_net_route *route;
route = grub_zalloc (sizeof (*route));
if (!route)
return grub_errno;
route->name = grub_strdup (name);
if (!route->name)
{
grub_free (route);
return grub_errno;
}
route->target = target;
route->is_gateway = 1;
route->gw = gw;
route->interface = inter;
grub_net_route_register (route);
return GRUB_ERR_NONE;
}
static grub_err_t
grub_cmd_addroute (struct grub_command *cmd __attribute__ ((unused)),
int argc, char **args)
{
grub_net_network_level_netaddress_t target;
if (argc < 3)
return grub_error (GRUB_ERR_BAD_ARGUMENT,
N_("three arguments expected"));
grub_net_resolve_net_address (args[1], &target);
if (grub_strcmp (args[2], "gw") == 0 && argc >= 4)
{
grub_err_t err;
grub_net_network_level_address_t gw;
err = grub_net_resolve_address (args[3], &gw);
if (err)
return err;
return grub_net_add_route_gw (args[0], target, gw, NULL);
}
else
{
struct grub_net_network_level_interface *inter;
FOR_NET_NETWORK_LEVEL_INTERFACES (inter)
if (grub_strcmp (inter->name, args[2]) == 0)
break;
if (!inter)
return grub_error (GRUB_ERR_BAD_ARGUMENT,
N_("unrecognised network interface `%s'"), args[2]);
return grub_net_add_route (args[0], target, inter);
}
}
static void
print_net_address (const grub_net_network_level_netaddress_t *target)
{
switch (target->type)
{
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_DHCP_RECV:
/* TRANSLATORS: it refers to the network address. */
grub_printf ("%s\n", _("temporary"));
return;
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV4:
{
grub_uint32_t n = grub_be_to_cpu32 (target->ipv4.base);
grub_printf ("%d.%d.%d.%d/%d ", ((n >> 24) & 0xff),
((n >> 16) & 0xff),
((n >> 8) & 0xff),
((n >> 0) & 0xff),
target->ipv4.masksize);
}
return;
case GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6:
{
char buf[GRUB_NET_MAX_STR_ADDR_LEN];
struct grub_net_network_level_address base;
base.type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6;
grub_memcpy (&base.ipv6, &target->ipv6, 16);
grub_net_addr_to_str (&base, buf);
grub_printf ("%s/%d ", buf, target->ipv6.masksize);
}
return;
}
grub_printf (_("Unknown address type %d\n"), target->type);
}
static void
print_address (const grub_net_network_level_address_t *target)
{
char buf[GRUB_NET_MAX_STR_ADDR_LEN];
grub_net_addr_to_str (target, buf);
grub_xputs (buf);
}
static grub_err_t
grub_cmd_listroutes (struct grub_command *cmd __attribute__ ((unused)),
int argc __attribute__ ((unused)),
char **args __attribute__ ((unused)))
{
struct grub_net_route *route;
FOR_NET_ROUTES(route)
{
grub_printf ("%s ", route->name);
print_net_address (&route->target);
if (route->is_gateway)
{
grub_printf ("gw ");
print_address (&route->gw);
}
else
grub_printf ("%s", route->interface->name);
grub_printf ("\n");
}
return GRUB_ERR_NONE;
}
static grub_err_t
grub_cmd_listcards (struct grub_command *cmd __attribute__ ((unused)),
int argc __attribute__ ((unused)),
char **args __attribute__ ((unused)))
{
struct grub_net_card *card;
FOR_NET_CARDS(card)
{
char buf[GRUB_NET_MAX_STR_HWADDR_LEN];
grub_net_hwaddr_to_str (&card->default_address, buf);
grub_printf ("%s %s\n", card->name, buf);
}
return GRUB_ERR_NONE;
}
static grub_err_t
grub_cmd_listaddrs (struct grub_command *cmd __attribute__ ((unused)),
int argc __attribute__ ((unused)),
char **args __attribute__ ((unused)))
{
struct grub_net_network_level_interface *inf;
FOR_NET_NETWORK_LEVEL_INTERFACES (inf)
{
char bufh[GRUB_NET_MAX_STR_HWADDR_LEN];
char bufn[GRUB_NET_MAX_STR_ADDR_LEN];
grub_net_hwaddr_to_str (&inf->hwaddress, bufh);
grub_net_addr_to_str (&inf->address, bufn);
grub_printf ("%s %s %s\n", inf->name, bufh, bufn);
}
return GRUB_ERR_NONE;
}
grub_net_app_level_t grub_net_app_level_list;
struct grub_net_socket *grub_net_sockets;
static grub_net_t
grub_net_open_real (const char *name)
{
grub_net_app_level_t proto;
const char *protname, *server;
grub_size_t protnamelen;
int try;
if (grub_strncmp (name, "pxe:", sizeof ("pxe:") - 1) == 0)
{
protname = "tftp";
protnamelen = sizeof ("tftp") - 1;
server = name + sizeof ("pxe:") - 1;
}
else if (grub_strcmp (name, "pxe") == 0)
{
protname = "tftp";
protnamelen = sizeof ("tftp") - 1;
server = grub_net_default_server;
}
else
{
const char *comma;
comma = grub_strchr (name, ',');
if (comma)
{
protnamelen = comma - name;
server = comma + 1;
protname = name;
}
else
{
protnamelen = grub_strlen (name);
server = grub_net_default_server;
protname = name;
}
}
if (!server)
{
grub_error (GRUB_ERR_NET_BAD_ADDRESS,
N_("no server is specified"));
return NULL;
}
for (try = 0; try < 2; try++)
{
FOR_NET_APP_LEVEL (proto)
{
if (grub_memcmp (proto->name, protname, protnamelen) == 0
&& proto->name[protnamelen] == 0)
{
grub_net_t ret = grub_zalloc (sizeof (*ret));
if (!ret)
return NULL;
ret->protocol = proto;
ret->server = grub_strdup (server);
if (!ret->server)
{
grub_free (ret);
return NULL;
}
ret->fs = &grub_net_fs;
return ret;
}
}
if (try == 0)
{
const char *prefix, *root;
char *prefdev, *comma;
int skip = 0;
grub_size_t devlen;
/* Do not attempt to load module if it requires protocol provided
by this module - it results in infinite recursion. Just continue,
fail and cleanup on next iteration.
*/
prefix = grub_env_get ("prefix");
if (!prefix)
continue;
prefdev = grub_file_get_device_name (prefix);
if (!prefdev)
{
root = grub_env_get ("root");
if (!root)
continue;
prefdev = grub_strdup (root);
if (!prefdev)
continue;
}
comma = grub_strchr (prefdev, ',');
if (comma)
*comma = '\0';
devlen = grub_strlen (prefdev);
if (protnamelen == devlen && grub_memcmp (prefdev, protname, devlen) == 0)
skip = 1;
grub_free (prefdev);
if (skip)
continue;
if (sizeof ("http") - 1 == protnamelen
&& grub_memcmp ("http", protname, protnamelen) == 0)
{
grub_dl_load ("http");
grub_errno = GRUB_ERR_NONE;
continue;
}
if (sizeof ("tftp") - 1 == protnamelen
&& grub_memcmp ("tftp", protname, protnamelen) == 0)
{
grub_dl_load ("tftp");
grub_errno = GRUB_ERR_NONE;
continue;
}
}
break;
}
/* Restore original error. */
grub_error (GRUB_ERR_UNKNOWN_DEVICE, N_("disk `%s' not found"),
name);
return NULL;
}
static grub_err_t
grub_net_fs_dir (grub_device_t device, const char *path __attribute__ ((unused)),
grub_fs_dir_hook_t hook __attribute__ ((unused)),
void *hook_data __attribute__ ((unused)))
{
if (!device->net)
return grub_error (GRUB_ERR_BUG, "invalid net device");
return GRUB_ERR_NONE;
}
static grub_err_t
grub_net_fs_open (struct grub_file *file_out, const char *name)
{
grub_err_t err;
struct grub_file *file, *bufio;
file = grub_malloc (sizeof (*file));
if (!file)
return grub_errno;
grub_memcpy (file, file_out, sizeof (struct grub_file));
file->device->net->packs.first = NULL;
file->device->net->packs.last = NULL;
file->device->net->name = grub_strdup (name);
if (!file->device->net->name)
{
grub_free (file);
return grub_errno;
}
err = file->device->net->protocol->open (file, name);
if (err)
{
while (file->device->net->packs.first)
{
grub_netbuff_free (file->device->net->packs.first->nb);
grub_net_remove_packet (file->device->net->packs.first);
}
grub_free (file->device->net->name);
grub_free (file);
return err;
}
bufio = grub_bufio_open (file, 32768);
if (! bufio)
{
while (file->device->net->packs.first)
{
grub_netbuff_free (file->device->net->packs.first->nb);
grub_net_remove_packet (file->device->net->packs.first);
}
file->device->net->protocol->close (file);
grub_free (file->device->net->name);
grub_free (file);
return grub_errno;
}
grub_memcpy (file_out, bufio, sizeof (struct grub_file));
grub_free (bufio);
return GRUB_ERR_NONE;
}
static grub_err_t
grub_net_fs_close (grub_file_t file)
{
while (file->device->net->packs.first)
{
grub_netbuff_free (file->device->net->packs.first->nb);
grub_net_remove_packet (file->device->net->packs.first);
}
file->device->net->protocol->close (file);
grub_free (file->device->net->name);
return GRUB_ERR_NONE;
}
static void
receive_packets (struct grub_net_card *card, int *stop_condition)
{
int received = 0;
if (card->num_ifaces == 0)
return;
if (!card->opened)
{
grub_err_t err = GRUB_ERR_NONE;
if (card->driver->open)
err = card->driver->open (card);
if (err)
{
grub_errno = GRUB_ERR_NONE;
return;
}
card->opened = 1;
}
while (received < 100)
{
/* Maybe should be better have a fixed number of packets for each card
and just mark them as used and not used. */
struct grub_net_buff *nb;
if (received > 10 && stop_condition && *stop_condition)
break;
nb = card->driver->recv (card);
if (!nb)
{
card->last_poll = grub_get_time_ms ();
break;
}
received++;
grub_net_recv_ethernet_packet (nb, card);
if (grub_errno)
{
grub_dprintf ("net", "error receiving: %d: %s\n", grub_errno,
grub_errmsg);
grub_errno = GRUB_ERR_NONE;
}
}
grub_print_error ();
}
static char *
grub_env_write_readonly (struct grub_env_var *var __attribute__ ((unused)),
const char *val __attribute__ ((unused)))
{
return NULL;
}
grub_err_t
grub_env_set_net_property (const char *intername, const char *suffix,
const char *value, grub_size_t len)
{
char *varname, *varvalue;
char *ptr;
varname = grub_xasprintf ("net_%s_%s", intername, suffix);
if (!varname)
return grub_errno;
for (ptr = varname; *ptr; ptr++)
if (*ptr == ':')
*ptr = '_';
varvalue = grub_malloc (len + 1);
if (!varvalue)
{
grub_free (varname);
return grub_errno;
}
grub_memcpy (varvalue, value, len);
varvalue[len] = 0;
grub_err_t ret = grub_env_set (varname, varvalue);
grub_register_variable_hook (varname, 0, grub_env_write_readonly);
grub_env_export (varname);
grub_free (varname);
grub_free (varvalue);
return ret;
}
void
grub_net_poll_cards (unsigned time, int *stop_condition)
{
struct grub_net_card *card;
grub_uint64_t start_time;
start_time = grub_get_time_ms ();
while ((grub_get_time_ms () - start_time) < time
&& (!stop_condition || !*stop_condition))
FOR_NET_CARDS (card)
receive_packets (card, stop_condition);
grub_net_tcp_retransmit ();
}
static void
grub_net_poll_cards_idle_real (void)
{
struct grub_net_card *card;
FOR_NET_CARDS (card)
{
grub_uint64_t ctime = grub_get_time_ms ();
if (ctime < card->last_poll
|| ctime >= card->last_poll + card->idle_poll_delay_ms)
receive_packets (card, 0);
}
grub_net_tcp_retransmit ();
}
/* Read from the packets list*/
static grub_ssize_t
grub_net_fs_read_real (grub_file_t file, char *buf, grub_size_t len)
{
grub_net_t net = file->device->net;
struct grub_net_buff *nb;
char *ptr = buf;
grub_size_t amount, total = 0;
int try = 0;
while (try <= GRUB_NET_TRIES)
{
while (net->packs.first)
{
try = 0;
nb = net->packs.first->nb;
amount = nb->tail - nb->data;
if (amount > len)
amount = len;
len -= amount;
total += amount;
file->device->net->offset += amount;
if (grub_file_progress_hook)
grub_file_progress_hook (0, 0, amount, file);
if (buf)
{
grub_memcpy (ptr, nb->data, amount);
ptr += amount;
}
if (amount == (grub_size_t) (nb->tail - nb->data))
{
grub_netbuff_free (nb);
grub_net_remove_packet (net->packs.first);
}
else
nb->data += amount;
if (!len)
{
if (net->protocol->packets_pulled)
net->protocol->packets_pulled (file);
return total;
}
}
if (net->protocol->packets_pulled)
net->protocol->packets_pulled (file);
if (!net->eof)
{
try++;
grub_net_poll_cards (GRUB_NET_INTERVAL +
(try * GRUB_NET_INTERVAL_ADDITION), &net->stall);
}
else
return total;
}
grub_error (GRUB_ERR_TIMEOUT, N_("timeout reading `%s'"), net->name);
return -1;
}
static grub_off_t
have_ahead (struct grub_file *file)
{
grub_net_t net = file->device->net;
grub_off_t ret = net->offset;
struct grub_net_packet *pack;
for (pack = net->packs.first; pack; pack = pack->next)
ret += pack->nb->tail - pack->nb->data;
return ret;
}
static grub_err_t
grub_net_seek_real (struct grub_file *file, grub_off_t offset)
{
if (offset == file->device->net->offset)
return GRUB_ERR_NONE;
if (offset > file->device->net->offset)
{
if (!file->device->net->protocol->seek || have_ahead (file) >= offset)
{
grub_net_fs_read_real (file, NULL,
offset - file->device->net->offset);
return grub_errno;
}
return file->device->net->protocol->seek (file, offset);
}
{
grub_err_t err;
if (file->device->net->protocol->seek)
return file->device->net->protocol->seek (file, offset);
while (file->device->net->packs.first)
{
grub_netbuff_free (file->device->net->packs.first->nb);
grub_net_remove_packet (file->device->net->packs.first);
}
file->device->net->protocol->close (file);
file->device->net->packs.first = NULL;
file->device->net->packs.last = NULL;
file->device->net->offset = 0;
file->device->net->eof = 0;
err = file->device->net->protocol->open (file, file->device->net->name);
if (err)
return err;
grub_net_fs_read_real (file, NULL, offset);
return grub_errno;
}
}
static grub_ssize_t
grub_net_fs_read (grub_file_t file, char *buf, grub_size_t len)
{
if (file->offset != file->device->net->offset)
{
grub_err_t err;
err = grub_net_seek_real (file, file->offset);
if (err)
return err;
}
return grub_net_fs_read_real (file, buf, len);
}
static struct grub_fs grub_net_fs =
{
.name = "netfs",
.dir = grub_net_fs_dir,
.open = grub_net_fs_open,
.read = grub_net_fs_read,
.close = grub_net_fs_close,
.label = NULL,
.uuid = NULL,
.mtime = NULL,
};
static grub_err_t
grub_net_fini_hw (int noreturn __attribute__ ((unused)))
{
struct grub_net_card *card;
FOR_NET_CARDS (card)
if (card->opened)
{
if (card->driver->close)
card->driver->close (card);
card->opened = 0;
}
return GRUB_ERR_NONE;
}
static grub_err_t
grub_net_restore_hw (void)
{
return GRUB_ERR_NONE;
}
static struct grub_preboot *fini_hnd;
static grub_command_t cmd_addaddr, cmd_deladdr, cmd_addroute, cmd_delroute;
static grub_command_t cmd_lsroutes, cmd_lscards;
static grub_command_t cmd_lsaddr, cmd_slaac;
GRUB_MOD_INIT(net)
{
grub_register_variable_hook ("net_default_server", defserver_get_env,
defserver_set_env);
grub_env_export ("net_default_server");
grub_register_variable_hook ("pxe_default_server", defserver_get_env,
defserver_set_env);
grub_env_export ("pxe_default_server");
grub_register_variable_hook ("net_default_ip", defip_get_env,
defip_set_env);
grub_env_export ("net_default_ip");
grub_register_variable_hook ("net_default_mac", defmac_get_env,
defmac_set_env);
grub_env_export ("net_default_mac");
cmd_addaddr = grub_register_command ("net_add_addr", grub_cmd_addaddr,
/* TRANSLATORS: HWADDRESS stands for
"hardware address". */
N_("SHORTNAME CARD ADDRESS [HWADDRESS]"),
N_("Add a network address."));
cmd_slaac = grub_register_command ("net_ipv6_autoconf",
grub_cmd_ipv6_autoconf,
N_("[CARD [HWADDRESS]]"),
N_("Perform an IPV6 autoconfiguration"));
cmd_deladdr = grub_register_command ("net_del_addr", grub_cmd_deladdr,
N_("SHORTNAME"),
N_("Delete a network address."));
cmd_addroute = grub_register_command ("net_add_route", grub_cmd_addroute,
/* TRANSLATORS: "gw" is a keyword. */
N_("SHORTNAME NET [INTERFACE| gw GATEWAY]"),
N_("Add a network route."));
cmd_delroute = grub_register_command ("net_del_route", grub_cmd_delroute,
N_("SHORTNAME"),
N_("Delete a network route."));
cmd_lsroutes = grub_register_command ("net_ls_routes", grub_cmd_listroutes,
"", N_("list network routes"));
cmd_lscards = grub_register_command ("net_ls_cards", grub_cmd_listcards,
"", N_("list network cards"));
cmd_lsaddr = grub_register_command ("net_ls_addr", grub_cmd_listaddrs,
"", N_("list network addresses"));
grub_bootp_init ();
grub_dns_init ();
grub_net_open = grub_net_open_real;
fini_hnd = grub_loader_register_preboot_hook (grub_net_fini_hw,
grub_net_restore_hw,
GRUB_LOADER_PREBOOT_HOOK_PRIO_DISK);
grub_net_poll_cards_idle = grub_net_poll_cards_idle_real;
}
GRUB_MOD_FINI(net)
{
grub_register_variable_hook ("net_default_server", 0, 0);
grub_register_variable_hook ("pxe_default_server", 0, 0);
grub_bootp_fini ();
grub_dns_fini ();
grub_unregister_command (cmd_addaddr);
grub_unregister_command (cmd_deladdr);
grub_unregister_command (cmd_addroute);
grub_unregister_command (cmd_delroute);
grub_unregister_command (cmd_lsroutes);
grub_unregister_command (cmd_lscards);
grub_unregister_command (cmd_lsaddr);
grub_unregister_command (cmd_slaac);
grub_fs_unregister (&grub_net_fs);
grub_net_open = NULL;
grub_net_fini_hw (0);
grub_loader_unregister_preboot_hook (fini_hnd);
grub_net_poll_cards_idle = grub_net_poll_cards_idle_real;
}
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