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