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 #ifndef HAVE_VLAN_INSERT_TAG_SET_PROTO
10 * The behavior of __vlan_put_tag()/vlan_insert_tag_set_proto() has changed
13 * - In 2.6.26 and earlier, it adjusted both MAC and network header
14 * pointers. (The latter didn't make any sense.)
16 * - In 2.6.27 and 2.6.28, it did not adjust any header pointers at all.
18 * - In 2.6.29 and later, it adjusts the MAC header pointer only.
20 * - In 3.19 and later, it was renamed to vlan_insert_tag_set_proto()
22 * This is the version from 2.6.33. We unconditionally substitute this version
23 * to avoid the need to guess whether the version in the kernel tree is
26 #define vlan_insert_tag_set_proto(skb, proto, vlan_tci) \
27 rpl_vlan_insert_tag_set_proto(skb, vlan_tci)
28 static inline struct sk_buff *rpl_vlan_insert_tag_set_proto(struct sk_buff *skb,
31 struct vlan_ethhdr *veth;
33 if (skb_cow_head(skb, VLAN_HLEN) < 0) {
37 veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
39 /* Move the mac addresses to the beginning of the new header. */
40 memmove(skb->data, skb->data + VLAN_HLEN, 2 * ETH_ALEN);
41 skb->mac_header -= VLAN_HLEN;
43 /* first, the ethernet type */
44 veth->h_vlan_proto = htons(ETH_P_8021Q);
47 veth->h_vlan_TCI = htons(vlan_tci);
49 skb->protocol = htons(ETH_P_8021Q);
55 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0)
56 static inline struct sk_buff *rpl___vlan_hwaccel_put_tag(struct sk_buff *skb,
60 return __vlan_hwaccel_put_tag(skb, vlan_tci);
63 #define __vlan_hwaccel_put_tag rpl___vlan_hwaccel_put_tag
66 /* All of these were introduced in a single commit preceding 2.6.33, so
67 * presumably all of them or none of them are present. */
68 #ifndef VLAN_PRIO_MASK
69 #define VLAN_PRIO_MASK 0xe000 /* Priority Code Point */
70 #define VLAN_PRIO_SHIFT 13
71 #define VLAN_CFI_MASK 0x1000 /* Canonical Format Indicator */
72 #define VLAN_TAG_PRESENT VLAN_CFI_MASK
75 #ifndef HAVE_VLAN_SET_ENCAP_PROTO
76 static inline void vlan_set_encap_proto(struct sk_buff *skb, struct vlan_hdr *vhdr)
82 * Was a VLAN packet, grab the encapsulated protocol, which the layer
83 * three protocols care about.
86 proto = vhdr->h_vlan_encapsulated_proto;
87 if (ntohs(proto) >= 1536) {
88 skb->protocol = proto;
93 if (*(unsigned short *) rawp == 0xFFFF)
95 * This is a magic hack to spot IPX packets. Older Novell
96 * breaks the protocol design and runs IPX over 802.3 without
97 * an 802.2 LLC layer. We look for FFFF which isn't a used
98 * 802.2 SSAP/DSAP. This won't work for fault tolerant netware
99 * but does for the rest.
101 skb->protocol = htons(ETH_P_802_3);
106 skb->protocol = htons(ETH_P_802_2);
109 #endif /* linux/if_vlan.h wrapper */