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u32: add rtnl_u32_get_key()

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Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Thomas Haller <thaller@redhat.com>
This commit is contained in:
Cong Wang 2013-12-13 15:24:50 -08:00 • committed by Thomas Haller
parent bc717a9bfc
commit d7aca17701
2 changed files with 38 additions and 0 deletions
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2
include/netlink/route/cls/u32.h
View file

@ -32,6 +32,8 @@ extern int rtnl_u32_set_cls_terminal(struct rtnl_cls *);
extern int rtnl_u32_set_flags(struct rtnl_cls *, int);
extern int rtnl_u32_add_key(struct rtnl_cls *, uint32_t, uint32_t,
int, int);
extern int rtnl_u32_get_key(struct rtnl_cls *, uint8_t, uint32_t *, uint32_t *,
int *, int *);
extern int rtnl_u32_add_key_uint8(struct rtnl_cls *, uint8_t, uint8_t,
int, int);
extern int rtnl_u32_add_key_uint16(struct rtnl_cls *, uint16_t, uint16_t,

36
lib/route/cls/u32.c
View file

@ -570,6 +570,42 @@ int rtnl_u32_add_key(struct rtnl_cls *cls, uint32_t val, uint32_t mask,
return 0;
}
/**
* Get the 32-bit key from the selector
*
* @arg cls classifier to be retrieve
* @arg index the index of the array of keys, start with 0
* @arg val pointer to store value after masked (network byte-order)
* @arg mask pointer to store the mask (network byte-order)
* @arg off pointer to store the offset
* @arg offmask pointer to store offset mask
*
*/
int rtnl_u32_get_key(struct rtnl_cls *cls, uint8_t index,
uint32_t *val, uint32_t *mask, int *off, int *offmask)
{
struct tc_u32_sel *sel;
struct rtnl_u32 *u;
if (!(u = rtnl_tc_data(TC_CAST(cls))))
return -NLE_NOMEM;
if (!(u->cu_mask & U32_ATTR_SELECTOR))
return -NLE_INVAL;
/* the selector might have been moved by realloc */
sel = u32_selector(u);
if (index >= sel->nkeys)
return -NLE_RANGE;
*mask = sel->keys[index].mask;
*val = sel->keys[index].val;
*off = sel->keys[index].off;
*offmask = sel->keys[index].offmask;
return 0;
}
int rtnl_u32_add_key_uint8(struct rtnl_cls *cls, uint8_t val, uint8_t mask,
int off, int offmask)
{