1 | /* SPDX-License-Identifier: GPL-2.0-only |
2 | * Copyright (c) 2013-2019, 2021 The Linux Foundation. All rights reserved. |
3 | */ |
4 | |
5 | #ifndef _LINUX_IF_RMNET_H_ |
6 | #define _LINUX_IF_RMNET_H_ |
7 | |
8 | #include <linux/types.h> |
9 | |
10 | struct { |
11 | u8 ; /* MAP_CMD_FLAG, MAP_PAD_LEN_MASK */ |
12 | u8 ; |
13 | __be16 ; /* Length of packet, including pad */ |
14 | } __aligned(1); |
15 | |
16 | /* rmnet_map_header flags field: |
17 | * PAD_LEN: number of pad bytes following packet data |
18 | * CMD: 1 = packet contains a MAP command; 0 = packet contains data |
19 | * NEXT_HEADER: 1 = packet contains V5 CSUM header 0 = no V5 CSUM header |
20 | */ |
21 | #define MAP_PAD_LEN_MASK GENMASK(5, 0) |
22 | #define BIT(6) |
23 | #define MAP_CMD_FLAG BIT(7) |
24 | |
25 | struct rmnet_map_dl_csum_trailer { |
26 | u8 reserved1; |
27 | u8 flags; /* MAP_CSUM_DL_VALID_FLAG */ |
28 | __be16 csum_start_offset; |
29 | __be16 csum_length; |
30 | __sum16 csum_value; |
31 | } __aligned(1); |
32 | |
33 | /* rmnet_map_dl_csum_trailer flags field: |
34 | * VALID: 1 = checksum and length valid; 0 = ignore them |
35 | */ |
36 | #define MAP_CSUM_DL_VALID_FLAG BIT(0) |
37 | |
38 | struct { |
39 | __be16 ; |
40 | __be16 ; /* MAP_CSUM_UL_* */ |
41 | } __aligned(1); |
42 | |
43 | /* csum_info field: |
44 | * OFFSET: where (offset in bytes) to insert computed checksum |
45 | * UDP: 1 = UDP checksum (zero checkum means no checksum) |
46 | * ENABLED: 1 = checksum computation requested |
47 | */ |
48 | #define MAP_CSUM_UL_OFFSET_MASK GENMASK(13, 0) |
49 | #define MAP_CSUM_UL_UDP_FLAG BIT(14) |
50 | #define MAP_CSUM_UL_ENABLED_FLAG BIT(15) |
51 | |
52 | /* MAP CSUM headers */ |
53 | struct { |
54 | u8 ; |
55 | u8 ; |
56 | __be16 ; |
57 | } __aligned(1); |
58 | |
59 | /* v5 header_info field |
60 | * NEXT_HEADER: represents whether there is any next header |
61 | * HEADER_TYPE: represents the type of this header |
62 | * |
63 | * csum_info field |
64 | * CSUM_VALID_OR_REQ: |
65 | * 1 = for UL, checksum computation is requested. |
66 | * 1 = for DL, validated the checksum and has found it valid |
67 | */ |
68 | |
69 | #define MAPV5_HDRINFO_NXT_HDR_FLAG BIT(0) |
70 | #define MAPV5_HDRINFO_HDR_TYPE_FMASK GENMASK(7, 1) |
71 | #define MAPV5_CSUMINFO_VALID_FLAG BIT(7) |
72 | |
73 | #define 2 |
74 | #endif /* !(_LINUX_IF_RMNET_H_) */ |
75 | |