1 /** @file
2 @brief 6lowpan handler
3
4 This is not to be included by the application.
5 */
6
7 /*
8 * Copyright (c) 2016 Intel Corporation
9 *
10 * SPDX-License-Identifier: Apache-2.0
11 */
12
13 #ifndef __NET_6LO_H
14 #define __NET_6LO_H
15
16 #include <zephyr/sys/slist.h>
17 #include <zephyr/types.h>
18
19 #include <zephyr/net/net_pkt.h>
20 #include "icmpv6.h"
21
22 /**
23 * @brief Compress IPv6 packet as per RFC 6282
24 *
25 * @details After this IPv6 packet and next header(if UDP), headers
26 * are compressed as per RFC 6282. After header compression data
27 * will be adjusted according to remaining space in fragments.
28 *
29 * @param Pointer to network packet
30 * @param iphc true for IPHC compression, false for IPv6 dispatch header
31 *
32 * @return header size difference on success (>= 0), negative errno otherwise
33 */
34 #if defined(CONFIG_NET_6LO)
35 int net_6lo_compress(struct net_pkt *pkt, bool iphc);
36 #else
net_6lo_compress(struct net_pkt * pkt,bool iphc)37 static inline int net_6lo_compress(struct net_pkt *pkt, bool iphc)
38 {
39 ARG_UNUSED(pkt);
40 ARG_UNUSED(iphc);
41
42 return 0;
43 }
44 #endif
45
46 /**
47 * @brief Uncompress IPv6 packet as per RFC 6282
48 *
49 * @details After this IPv6 packet and next header(if UDP), headers
50 * are uncompressed as per RFC 6282. After header uncompression data
51 * will be adjusted according to remaining space in fragments.
52 *
53 * @param Pointer to network packet
54 *
55 * @return True on success, false otherwise
56 */
57 #if defined(CONFIG_NET_6LO)
58 bool net_6lo_uncompress(struct net_pkt *pkt);
59 #else
net_6lo_uncompress(struct net_pkt * pkt)60 static inline bool net_6lo_uncompress(struct net_pkt *pkt)
61 {
62 ARG_UNUSED(pkt);
63
64 return true;
65 }
66 #endif
67
68 /**
69 * @brief Set 6lowpan context information
70 *
71 * @details Set 6lowpan context information. This context information
72 * will be used in IPv6 header compression and uncompression.
73 *
74 * @return True on success, false otherwise
75 */
76 #if defined(CONFIG_NET_6LO_CONTEXT)
77 void net_6lo_set_context(struct net_if *iface,
78 struct net_icmpv6_nd_opt_6co *context);
79 #endif
80
81 /**
82 * @brief Return the header size difference after uncompression
83 *
84 * @details This will do a dry-run on uncompressing the headers.
85 * The point is only to calculate the difference.
86 *
87 * @param Pointer to network packet
88 *
89 * @return header difference or INT_MAX in case of error.
90 */
91 #if defined(CONFIG_NET_6LO)
92 int net_6lo_uncompress_hdr_diff(struct net_pkt *pkt);
93 #endif
94
95 #endif /* __NET_6LO_H */
96
