diff options
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/6lowpan.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/net/6lowpan.h b/include/net/6lowpan.h index 2f6a3f2233ed..da3a77d25fcb 100644 --- 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 *)); |