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This commit is contained in:
Manoel Rebelo Abranches 2011-06-07 21:59:53 -03:00
parent 423a1849ef
commit 4700d08bb4
8 changed files with 307 additions and 288 deletions
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59
grub-core/net/netbuff.c
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@ -22,73 +22,84 @@
#include <grub/net/netbuff.h>
grub_err_t grub_netbuff_put (struct grub_net_buff *nb ,grub_size_t len)
grub_err_t
grub_netbuff_put (struct grub_net_buff *nb, grub_size_t len)
{
nb->tail += len;
if (nb->tail > nb->end)
return grub_error (GRUB_ERR_OUT_OF_RANGE, "put out of the packet range.");
return GRUB_ERR_NONE;
return GRUB_ERR_NONE;
}
grub_err_t grub_netbuff_unput (struct grub_net_buff *nb ,grub_size_t len)
grub_err_t
grub_netbuff_unput (struct grub_net_buff *nb, grub_size_t len)
{
nb->tail -= len;
if (nb->tail < nb->head)
return grub_error (GRUB_ERR_OUT_OF_RANGE, "unput out of the packet range.");
return GRUB_ERR_NONE;
return grub_error (GRUB_ERR_OUT_OF_RANGE,
"unput out of the packet range.");
return GRUB_ERR_NONE;
}
grub_err_t grub_netbuff_push (struct grub_net_buff *nb ,grub_size_t len)
grub_err_t
grub_netbuff_push (struct grub_net_buff *nb, grub_size_t len)
{
nb->data -= len;
if (nb->data < nb->head)
return grub_error (GRUB_ERR_OUT_OF_RANGE, "push out of the packet range.");
return GRUB_ERR_NONE;
return grub_error (GRUB_ERR_OUT_OF_RANGE,
"push out of the packet range.");
return GRUB_ERR_NONE;
}
grub_err_t grub_netbuff_pull (struct grub_net_buff *nb ,grub_size_t len)
grub_err_t
grub_netbuff_pull (struct grub_net_buff *nb, grub_size_t len)
{
nb->data += len;
if (nb->data > nb->end)
return grub_error (GRUB_ERR_OUT_OF_RANGE, "pull out of the packet range.");
return GRUB_ERR_NONE;
return grub_error (GRUB_ERR_OUT_OF_RANGE,
"pull out of the packet range.");
return GRUB_ERR_NONE;
}
grub_err_t grub_netbuff_reserve (struct grub_net_buff *nb ,grub_size_t len)
grub_err_t
grub_netbuff_reserve (struct grub_net_buff *nb, grub_size_t len)
{
nb->data += len;
nb->tail += len;
if ((nb->tail > nb->end) || (nb->data > nb->end))
return grub_error (GRUB_ERR_OUT_OF_RANGE, "reserve out of the packet range.");
return GRUB_ERR_NONE;
return grub_error (GRUB_ERR_OUT_OF_RANGE,
"reserve out of the packet range.");
return GRUB_ERR_NONE;
}
struct grub_net_buff *grub_netbuff_alloc ( grub_size_t len )
struct grub_net_buff *
grub_netbuff_alloc (grub_size_t len)
{
struct grub_net_buff *nb;
void *data;
if (len < NETBUFFMINLEN)
if (len < NETBUFFMINLEN)
len = NETBUFFMINLEN;
len = ALIGN_UP (len,NETBUFF_ALIGN);
len = ALIGN_UP (len, NETBUFF_ALIGN);
data = grub_memalign (NETBUFF_ALIGN, len + sizeof (*nb));
if (!data)
return NULL;
nb = (struct grub_net_buff *) ((grub_uint8_t *) data + len);
nb = (struct grub_net_buff *) ((grub_uint8_t *) data + len);
nb->head = nb->data = nb->tail = data;
nb->end = (char *) nb;
return nb;
nb->end = (char *) nb;
return nb;
}
grub_err_t grub_netbuff_free (struct grub_net_buff *nb)
grub_err_t
grub_netbuff_free (struct grub_net_buff *nb)
{
grub_free (nb->head);
return 0;
}
grub_err_t grub_netbuff_clear (struct grub_net_buff *nb)
grub_err_t
grub_netbuff_clear (struct grub_net_buff *nb)
{
nb->data = nb->tail = nb->head;
return 0;