This will soon be used in the upcoming bond library.
---
lib/dpif-netdev.c | 32 +-------------------------------
lib/packets.c | 35 ++++++++++++++++++++++++++++++++++-
lib/packets.h | 2 ++
3 files changed, 37 insertions(+), 32 deletions(-)
diff --git a/lib/dpif-netdev.c b/lib/dpif-netdev.c
index 035ceae..cffbc9b 100644
--- a/lib/dpif-netdev.c
+++ b/lib/dpif-netdev.c
@@ -1137,36 +1137,6 @@ dp_netdev_wait(void)
}
-/* Modify the TCI field of 'packet'. If a VLAN tag is present, its TCI field
- * is replaced by 'tci'. If a VLAN tag is not present, one is added with the
- * TCI field set to 'tci'.
- */
-static void
-dp_netdev_set_dl_tci(struct ofpbuf *packet, uint16_t tci)
-{
- struct vlan_eth_header *veh;
- struct eth_header *eh;
-
- eh = packet->l2;
- if (packet->size >= sizeof(struct vlan_eth_header)
- && eh->eth_type == htons(ETH_TYPE_VLAN)) {
- veh = packet->l2;
- veh->veth_tci = tci;
- } else {
- /* Insert new 802.1Q header. */
- struct vlan_eth_header tmp;
- memcpy(tmp.veth_dst, eh->eth_dst, ETH_ADDR_LEN);
- memcpy(tmp.veth_src, eh->eth_src, ETH_ADDR_LEN);
- tmp.veth_type = htons(ETH_TYPE_VLAN);
- tmp.veth_tci = tci;
- tmp.veth_next_type = eh->eth_type;
-
- veh = ofpbuf_push_uninit(packet, VLAN_HEADER_LEN);
- memcpy(veh, &tmp, sizeof tmp);
- packet->l2 = (char*)packet->l2 - VLAN_HEADER_LEN;
- }
-}
-
static void
dp_netdev_strip_vlan(struct ofpbuf *packet)
{
@@ -1369,7 +1339,7 @@ dp_netdev_execute_actions(struct dp_netdev *dp,
break;
case ODP_ACTION_ATTR_SET_DL_TCI:
- dp_netdev_set_dl_tci(packet, nl_attr_get_be16(a));
+ eth_set_vlan_tci(packet, nl_attr_get_be16(a));
break;
case ODP_ACTION_ATTR_STRIP_VLAN:
diff --git a/lib/packets.c b/lib/packets.c
index f16e749..4c6cc48 100644
--- a/lib/packets.c
+++ b/lib/packets.c
@@ -75,6 +75,40 @@ compose_benign_packet(struct ofpbuf *b, const char *tag,
uint16_t snap_type,
memcpy(payload + tag_size, eth_src, ETH_ADDR_LEN);
}
+/* Modify the TCI field of 'packet', whose data must begin with an Ethernet
+ * header. If a VLAN tag is present, its TCI field is replaced by 'tci'. If a
+ * VLAN tag is not present, one is added with the TCI field set to 'tci'.
+ *
+ * If 'packet->l2' is set before the call, then it should point to the Ethernet
+ * header. This function will adjust it, if necessary, so that it still points
+ * to the Ethernet header afterward. afterward. */
+void
+eth_set_vlan_tci(struct ofpbuf *packet, ovs_be16 tci)
+{
+ struct eth_header *eh = packet->data;
+ struct vlan_eth_header *veh;
+
+ if (packet->size >= sizeof(struct vlan_eth_header)
+ && eh->eth_type == htons(ETH_TYPE_VLAN)) {
+ veh = packet->data;
+ veh->veth_tci = tci;
+ } else {
+ /* Insert new 802.1Q header. */
+ struct vlan_eth_header tmp;
+ memcpy(tmp.veth_dst, eh->eth_dst, ETH_ADDR_LEN);
+ memcpy(tmp.veth_src, eh->eth_src, ETH_ADDR_LEN);
+ tmp.veth_type = htons(ETH_TYPE_VLAN);
+ tmp.veth_tci = tci;
+ tmp.veth_next_type = eh->eth_type;
+
+ veh = ofpbuf_push_uninit(packet, VLAN_HEADER_LEN);
+ memcpy(veh, &tmp, sizeof tmp);
+ if (packet->l2) {
+ packet->l2 = packet->data;
+ }
+ }
+}
+
/* Stores the string representation of the IPv6 address 'addr' into the
* character array 'addr_str', which must be at least INET6_ADDRSTRLEN
* bytes long. */
@@ -163,7 +197,6 @@ ipv6_count_cidr_bits(const struct in6_addr *netmask)
return count;
}
-
/* Returns true if 'netmask' is a CIDR netmask, that is, if it consists of N
* high-order 1-bits and 128-N low-order 0-bits. */
bool
diff --git a/lib/packets.h b/lib/packets.h
index 17ef5a6..0ca5631 100644
--- a/lib/packets.h
+++ b/lib/packets.h
@@ -131,6 +131,8 @@ void compose_benign_packet(struct ofpbuf *, const char *tag,
uint16_t snap_type,
const uint8_t eth_src[ETH_ADDR_LEN]);
+void eth_set_vlan_tci(struct ofpbuf *, ovs_be16 tci);
+
/* Example:
*
* uint8_t mac[ETH_ADDR_LEN];
--
1.7.1
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