1 #ifndef __LINUX_IF_VLAN_WRAPPER_H
2 #define __LINUX_IF_VLAN_WRAPPER_H 1
4 #include <linux/skbuff.h>
5 #include <linux/version.h>
6 #include_next <linux/if_vlan.h>
8 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0)
10 * The behavior of __vlan_put_tag() has changed over time:
12 * - In 2.6.26 and earlier, it adjusted both MAC and network header
13 * pointers. (The latter didn't make any sense.)
15 * - In 2.6.27 and 2.6.28, it did not adjust any header pointers at all.
17 * - In 2.6.29 and later, it adjusts the MAC header pointer only.
19 * This is the version from 2.6.33. We unconditionally substitute this version
20 * to avoid the need to guess whether the version in the kernel tree is
23 #define __vlan_put_tag(skb, proto, tag) rpl__vlan_put_tag(skb, tag)
25 static inline struct sk_buff *rpl__vlan_put_tag(struct sk_buff *skb, u16 vlan_tci)
27 struct vlan_ethhdr *veth;
29 if (skb_cow_head(skb, VLAN_HLEN) < 0) {
33 veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
35 /* Move the mac addresses to the beginning of the new header. */
36 memmove(skb->data, skb->data + VLAN_HLEN, 2 * ETH_ALEN);
37 skb->mac_header -= VLAN_HLEN;
39 /* first, the ethernet type */
40 veth->h_vlan_proto = htons(ETH_P_8021Q);
43 veth->h_vlan_TCI = htons(vlan_tci);
45 skb->protocol = htons(ETH_P_8021Q);
50 static inline struct sk_buff *rpl___vlan_hwaccel_put_tag(struct sk_buff *skb,
54 return __vlan_hwaccel_put_tag(skb, vlan_tci);
57 #define __vlan_hwaccel_put_tag rpl___vlan_hwaccel_put_tag
61 /* All of these were introduced in a single commit preceding 2.6.33, so
62 * presumably all of them or none of them are present. */
63 #ifndef VLAN_PRIO_MASK
64 #define VLAN_PRIO_MASK 0xe000 /* Priority Code Point */
65 #define VLAN_PRIO_SHIFT 13
66 #define VLAN_CFI_MASK 0x1000 /* Canonical Format Indicator */
67 #define VLAN_TAG_PRESENT VLAN_CFI_MASK
70 #ifndef HAVE_VLAN_SET_ENCAP_PROTO
71 static inline void vlan_set_encap_proto(struct sk_buff *skb, struct vlan_hdr *vhdr)
77 * Was a VLAN packet, grab the encapsulated protocol, which the layer
78 * three protocols care about.
81 proto = vhdr->h_vlan_encapsulated_proto;
82 if (ntohs(proto) >= 1536) {
83 skb->protocol = proto;
88 if (*(unsigned short *) rawp == 0xFFFF)
90 * This is a magic hack to spot IPX packets. Older Novell
91 * breaks the protocol design and runs IPX over 802.3 without
92 * an 802.2 LLC layer. We look for FFFF which isn't a used
93 * 802.2 SSAP/DSAP. This won't work for fault tolerant netware
94 * but does for the rest.
96 skb->protocol = htons(ETH_P_802_3);
101 skb->protocol = htons(ETH_P_802_2);
104 #endif /* linux/if_vlan.h wrapper */