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grub/grub-core/net/net.c
Vladimir 'phcoder' Serbinenko 418f45abd1 * grub-core/net/dns.c (grub_cmd_nslookup): Init addresses to 0 to avoid 
freeing random buffer on failure.
	* grub-core/net/net.c (grub_net_resolve_address): Likewise.
2012-06-21 22:11:47 +02:00

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/*
* 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.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
{
struct grub_net_route *next;
struct grub_net_route **prev;
grub_net_network_level_netaddress_t target;
char *name;
struct grub_net_network_level_protocol *prot;
int is_gateway;
union
{
struct grub_net_network_level_interface *interface;
grub_net_network_level_address_t gw;
};
};
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;
}
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[grub_strlen (card->name)
+ GRUB_NET_MAX_STR_HWADDR_LEN
+ sizeof (":link")];
char *ptr;
grub_net_network_level_address_t addr;
addr.type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6;
addr.ipv6[0] = grub_cpu_to_be64 (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;
}
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 (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)
{
/* FIXME: send router solicitation. */
int done = 1;
for (j = 0; j < ncards; j++)
{
if (slaacs[j]->slaac_counter)
continue;
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 inline void
grub_net_route_register (struct grub_net_route *route)
{
grub_list_push (GRUB_AS_LIST_P (&grub_net_routes),
GRUB_AS_LIST (route));
}
static inline void
grub_net_route_unregister (struct grub_net_route *route)
{
grub_list_remove (GRUB_AS_LIST (route));
}
#define FOR_NET_ROUTES(var) for (var = grub_net_routes; var; var = var->next)
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 <= 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;
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:
/* TRANSLATORS: it refers to the network address. */
grub_strncpy (buf, "temporary", GRUB_NET_MAX_STR_ADDR_LEN);
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 void
grub_net_network_level_interface_register (struct grub_net_network_level_interface *inter)
{
{
char buf[GRUB_NET_MAX_STR_HWADDR_LEN];
char name[grub_strlen (inter->name) + sizeof ("net__mac")];
char *ptr;
grub_net_hwaddr_to_str (&inter->hwaddress, buf);
grub_snprintf (name, sizeof (name), "net_%s_mac", inter->name);
for (ptr = name; *ptr; ptr++)
if (*ptr == ':')
*ptr = '_';
grub_env_set (name, buf);
grub_register_variable_hook (name, 0, hwaddr_set_env);
}
{
char buf[GRUB_NET_MAX_STR_ADDR_LEN];
char name[grub_strlen (inter->name) + sizeof ("net__ip")];
char *ptr;
grub_net_addr_to_str (&inter->address, buf);
grub_snprintf (name, sizeof (name), "net_%s_ip", inter->name);
for (ptr = name; *ptr; ptr++)
if (*ptr == ':')
*ptr = '_';
grub_env_set (name, buf);
grub_register_variable_hook (name, 0, addr_set_env);
}
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;
}
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)
{
struct grub_net_network_level_interface *inter;
inter = grub_zalloc (sizeof (*inter));
if (!inter)
return NULL;
inter->name = grub_strdup (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;
}
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_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;
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);
}
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;
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_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;
if (server)
{
ret->server = grub_strdup (server);
if (!ret->server)
{
grub_free (ret);
return NULL;
}
}
else
ret->server = NULL;
ret->fs = &grub_net_fs;
ret->offset = 0;
ret->eof = 0;
return ret;
}
}
/* 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)),
int (*hook) (const char *filename,
const struct grub_dirhook_info *info) __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)
return grub_errno;
err = file->device->net->protocol->open (file, name);
if (err)
return err;
bufio = grub_bufio_open (file, 32768);
if (! bufio)
{
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)
{
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 (1)
{
/* 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;
nb = card->driver->recv (card);
if (!nb)
{
card->last_poll = grub_get_time_ms ();
break;
}
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 ();
}
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);
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);
}
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 (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)
return total;
}
if (!net->eof)
{
try++;
grub_net_poll_cards (GRUB_NET_INTERVAL, &net->eof);
}
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_register_variable_hook ("pxe_default_server", defserver_get_env,
defserver_set_env);
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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