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classifier: Add helpers for setting ethernet addresses

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Add helpers for setting ethernet addresses.
This patch makes use of them for setting the dl_src and dl_dst
addresses. A subsequent patch will also use them for arp_sha and arp_tpa.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Simon Horman
2012-07-18 12:02:20 +09:00
committed by Ben Pfaff
parent 3245502404
commit a7d78e8d22
1 changed files with 44 additions and 24 deletions
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68
lib/classifier.c
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@@ -160,52 +160,72 @@ cls_rule_set_dl_type(struct cls_rule *rule, ovs_be16 dl_type)
rule->flow.dl_type = dl_type;
}
/* Modifies 'value_src' so that the Ethernet address must match
* 'value_dst' exactly. 'mask_dst' is set to all 1s */
static void
cls_rule_set_eth(const uint8_t value_src[ETH_ADDR_LEN],
uint8_t value_dst[ETH_ADDR_LEN],
uint8_t mask_dst[ETH_ADDR_LEN])
{
memcpy(value_dst, value_src, ETH_ADDR_LEN);
memset(mask_dst, 0xff, ETH_ADDR_LEN);
}
/* Modifies 'value_src' so that the Ethernet address must match
* 'value_src' after each byte is ANDed with the appropriate byte in
* 'mask_src'. 'mask_dst' is set to 'mask_src' */
static void
cls_rule_set_eth_masked(const uint8_t value_src[ETH_ADDR_LEN],
const uint8_t mask_src[ETH_ADDR_LEN],
uint8_t value_dst[ETH_ADDR_LEN],
uint8_t mask_dst[ETH_ADDR_LEN])
{
size_t i;
for (i = 0; i < ETH_ADDR_LEN; i++) {
value_dst[i] = value_src[i] & mask_src[i];
mask_dst[i] = mask_src[i];
}
}
/* Modifies 'rule' so that the source Ethernet address
* must match 'dl_src' exactly. */
void
cls_rule_set_dl_src(struct cls_rule *rule, const uint8_t dl_src[ETH_ADDR_LEN])
{
memcpy(rule->flow.dl_src, dl_src, ETH_ADDR_LEN);
memset(rule->wc.dl_src_mask, 0xff, ETH_ADDR_LEN);
cls_rule_set_eth(dl_src, rule->flow.dl_src, rule->wc.dl_src_mask);
}
/* Modifies 'rule' so that the Ethernet address must match 'dl_src' after each
* byte is ANDed with the appropriate byte in 'mask'. */
/* Modifies 'rule' so that the source Ethernet address
* must match 'dl_src' after each byte is ANDed with
* the appropriate byte in 'mask'. */
void
cls_rule_set_dl_src_masked(struct cls_rule *rule,
const uint8_t dl_src[ETH_ADDR_LEN],
const uint8_t mask[ETH_ADDR_LEN])
{
size_t i;
for (i = 0; i < ETH_ADDR_LEN; i++) {
rule->flow.dl_src[i] = dl_src[i] & mask[i];
rule->wc.dl_src_mask[i] = mask[i];
}
cls_rule_set_eth_masked(dl_src, mask,
rule->flow.dl_src, rule->wc.dl_src_mask);
}
/* Modifies 'rule' so that the Ethernet address must match 'dl_dst' exactly. */
/* Modifies 'rule' so that the destination Ethernet address
* must match 'dl_dst' exactly. */
void
cls_rule_set_dl_dst(struct cls_rule *rule, const uint8_t dl_dst[ETH_ADDR_LEN])
{
memcpy(rule->flow.dl_dst, dl_dst, ETH_ADDR_LEN);
memset(rule->wc.dl_dst_mask, 0xff, ETH_ADDR_LEN);
cls_rule_set_eth(dl_dst, rule->flow.dl_dst, rule->wc.dl_dst_mask);
}
/* Modifies 'rule' so that the Ethernet address must match 'dl_dst' after each
* byte is ANDed with the appropriate byte in 'mask'.
*
* This function will assert-fail if 'mask' is invalid. Only 'mask' values
* accepted by flow_wildcards_is_dl_dst_mask_valid() are allowed. */
/* Modifies 'rule' so that the destination Ethernet address
* must match 'dl_src' after each byte is ANDed with
* the appropriate byte in 'mask'. */
void
cls_rule_set_dl_dst_masked(struct cls_rule *rule,
const uint8_t dl_dst[ETH_ADDR_LEN],
const uint8_t mask[ETH_ADDR_LEN])
{
size_t i;
for (i = 0; i < ETH_ADDR_LEN; i++) {
rule->flow.dl_dst[i] = dl_dst[i] & mask[i];
rule->wc.dl_dst_mask[i] = mask[i];
}
cls_rule_set_eth_masked(dl_dst, mask,
rule->flow.dl_dst, rule->wc.dl_dst_mask);
}
void