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move packet allocation to recv code to allow bigger buffers

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2011-07-08 20:38:12 +02:00
parent 6a1af81a97
commit e2955971a3
7 changed files with 105 additions and 55 deletions
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31
grub-core/net/drivers/emu/emunet.c
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@ -43,19 +43,34 @@ send_card_buffer (const struct grub_net_card *dev __attribute__ ((unused)),
return GRUB_ERR_NONE;
}
static grub_ssize_t
get_card_packet (const struct grub_net_card *dev __attribute__ ((unused)),
struct grub_net_buff *pack)
static struct grub_net_buff *
get_card_packet (const struct grub_net_card *dev __attribute__ ((unused)))
{
ssize_t actual;
struct grub_net_buff *nb;
grub_netbuff_clear (pack);
actual = read (fd, pack->data, 1500);
nb = grub_netbuff_alloc (1536);
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);
if (!nb)
{
grub_netbuff_free (nb);
return NULL;
}
actual = read (fd, nb->data, 1536);
if (actual < 0)
return -1;
grub_netbuff_put (pack, actual);
{
grub_netbuff_free (nb);
return NULL;
}
grub_netbuff_put (nb, actual);
return actual;
return nb;
}
static struct grub_net_card_driver emudriver =