vxlan: implement GPE

[deliverable/linux.git] / include / net / 6lowpan.h

diff --git a/include/net/6lowpan.h b/include/net/6lowpan.h
index 2f6a3f2233edf8e2052c7c5bd5856894bbe7d5eb..da3a77d25fcbe1d32fcf9fff0659e48612a0e0c1 100644 (file)
--- a/include/net/6lowpan.h
+++ b/include/net/6lowpan.h
@@ -75,6 +75,8 @@
 #define LOWPAN_IPHC_MAX_HC_BUF_LEN     (sizeof(struct ipv6hdr) +       \
                                         LOWPAN_IPHC_MAX_HEADER_LEN +   \
                                         LOWPAN_NHC_MAX_HDR_LEN)
+/* SCI/DCI is 4 bit width, so we have maximum 16 entries */
+#define LOWPAN_IPHC_CTX_TABLE_SIZE     (1 << 4)
 
 #define LOWPAN_DISPATCH_IPV6           0x41 /* 01000001 = 65 */
 #define LOWPAN_DISPATCH_IPHC           0x60 /* 011xxxxx = ... */
@@ -98,9 +100,39 @@ enum lowpan_lltypes {
        LOWPAN_LLTYPE_IEEE802154,
 };
 
+enum lowpan_iphc_ctx_flags {
+       LOWPAN_IPHC_CTX_FLAG_ACTIVE,
+       LOWPAN_IPHC_CTX_FLAG_COMPRESSION,
+};
+
+struct lowpan_iphc_ctx {
+       u8 id;
+       struct in6_addr pfx;
+       u8 plen;
+       unsigned long flags;
+};
+
+struct lowpan_iphc_ctx_table {
+       spinlock_t lock;
+       const struct lowpan_iphc_ctx_ops *ops;
+       struct lowpan_iphc_ctx table[LOWPAN_IPHC_CTX_TABLE_SIZE];
+};
+
+static inline bool lowpan_iphc_ctx_is_active(const struct lowpan_iphc_ctx *ctx)
+{
+       return test_bit(LOWPAN_IPHC_CTX_FLAG_ACTIVE, &ctx->flags);
+}
+
+static inline bool
+lowpan_iphc_ctx_is_compression(const struct lowpan_iphc_ctx *ctx)
+{
+       return test_bit(LOWPAN_IPHC_CTX_FLAG_COMPRESSION, &ctx->flags);
+}
+
 struct lowpan_priv {
        enum lowpan_lltypes lltype;
        struct dentry *iface_debugfs;
+       struct lowpan_iphc_ctx_table ctx;
 
        /* must be last */
        u8 priv[0] __aligned(sizeof(void *));