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1/* Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.
2 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 */
12
13#ifndef _RMNET_MAP_H_
14#define _RMNET_MAP_H_
15
16struct rmnet_map_control_command {
17 u8 command_name;
18 u8 cmd_type:2;
19 u8 reserved:6;
20 u16 reserved2;
21 u32 transaction_id;
22 union {
23 struct {
24 u16 ip_family:2;
25 u16 reserved:14;
26 __be16 flow_control_seq_num;
27 __be32 qos_id;
28 } flow_control;
29 u8 data[0];
30 };
31} __aligned(1);
32
33enum rmnet_map_commands {
34 RMNET_MAP_COMMAND_NONE,
35 RMNET_MAP_COMMAND_FLOW_DISABLE,
36 RMNET_MAP_COMMAND_FLOW_ENABLE,
37 /* These should always be the last 2 elements */
38 RMNET_MAP_COMMAND_UNKNOWN,
39 RMNET_MAP_COMMAND_ENUM_LENGTH
40};
41
42struct rmnet_map_header {
43 u8 pad_len:6;
44 u8 reserved_bit:1;
45 u8 cd_bit:1;
46 u8 mux_id;
47 __be16 pkt_len;
48} __aligned(1);
49
50struct rmnet_map_dl_csum_trailer {
51 u8 reserved1;
52 u8 valid:1;
53 u8 reserved2:7;
54 u16 csum_start_offset;
55 u16 csum_length;
56 __be16 csum_value;
57} __aligned(1);
58
59struct rmnet_map_ul_csum_header {
60 __be16 csum_start_offset;
61 u16 csum_insert_offset:14;
62 u16 udp_ip4_ind:1;
63 u16 csum_enabled:1;
64} __aligned(1);
65
66#define RMNET_MAP_GET_MUX_ID(Y) (((struct rmnet_map_header *) \
67 (Y)->data)->mux_id)
68#define RMNET_MAP_GET_CD_BIT(Y) (((struct rmnet_map_header *) \
69 (Y)->data)->cd_bit)
70#define RMNET_MAP_GET_PAD(Y) (((struct rmnet_map_header *) \
71 (Y)->data)->pad_len)
72#define RMNET_MAP_GET_CMD_START(Y) ((struct rmnet_map_control_command *) \
73 ((Y)->data + \
74 sizeof(struct rmnet_map_header)))
75#define RMNET_MAP_GET_LENGTH(Y) (ntohs(((struct rmnet_map_header *) \
76 (Y)->data)->pkt_len))
77
78#define RMNET_MAP_COMMAND_REQUEST 0
79#define RMNET_MAP_COMMAND_ACK 1
80#define RMNET_MAP_COMMAND_UNSUPPORTED 2
81#define RMNET_MAP_COMMAND_INVALID 3
82
83#define RMNET_MAP_NO_PAD_BYTES 0
84#define RMNET_MAP_ADD_PAD_BYTES 1
85
86struct sk_buff *rmnet_map_deaggregate(struct sk_buff *skb,
87 struct rmnet_port *port);
88struct rmnet_map_header *rmnet_map_add_map_header(struct sk_buff *skb,
89 int hdrlen, int pad);
90void rmnet_map_command(struct sk_buff *skb, struct rmnet_port *port);
91int rmnet_map_checksum_downlink_packet(struct sk_buff *skb, u16 len);
92void rmnet_map_checksum_uplink_packet(struct sk_buff *skb,
93 struct net_device *orig_dev);
94
95#endif /* _RMNET_MAP_H_ */
1/* SPDX-License-Identifier: GPL-2.0-only */
2/* Copyright (c) 2013-2018, 2021, The Linux Foundation. All rights reserved.
3 */
4
5#ifndef _RMNET_MAP_H_
6#define _RMNET_MAP_H_
7#include <linux/if_rmnet.h>
8
9struct rmnet_map_control_command {
10 u8 command_name;
11 u8 cmd_type:2;
12 u8 reserved:6;
13 u16 reserved2;
14 u32 transaction_id;
15 union {
16 struct {
17 u16 ip_family:2;
18 u16 reserved:14;
19 __be16 flow_control_seq_num;
20 __be32 qos_id;
21 } flow_control;
22 DECLARE_FLEX_ARRAY(u8, data);
23 };
24} __aligned(1);
25
26enum rmnet_map_commands {
27 RMNET_MAP_COMMAND_NONE,
28 RMNET_MAP_COMMAND_FLOW_DISABLE,
29 RMNET_MAP_COMMAND_FLOW_ENABLE,
30 /* These should always be the last 2 elements */
31 RMNET_MAP_COMMAND_UNKNOWN,
32 RMNET_MAP_COMMAND_ENUM_LENGTH
33};
34
35#define RMNET_MAP_COMMAND_REQUEST 0
36#define RMNET_MAP_COMMAND_ACK 1
37#define RMNET_MAP_COMMAND_UNSUPPORTED 2
38#define RMNET_MAP_COMMAND_INVALID 3
39
40#define RMNET_MAP_NO_PAD_BYTES 0
41#define RMNET_MAP_ADD_PAD_BYTES 1
42
43struct sk_buff *rmnet_map_deaggregate(struct sk_buff *skb,
44 struct rmnet_port *port);
45struct rmnet_map_header *rmnet_map_add_map_header(struct sk_buff *skb,
46 int hdrlen,
47 struct rmnet_port *port,
48 int pad);
49void rmnet_map_command(struct sk_buff *skb, struct rmnet_port *port);
50int rmnet_map_checksum_downlink_packet(struct sk_buff *skb, u16 len);
51void rmnet_map_checksum_uplink_packet(struct sk_buff *skb,
52 struct rmnet_port *port,
53 struct net_device *orig_dev,
54 int csum_type);
55int rmnet_map_process_next_hdr_packet(struct sk_buff *skb, u16 len);
56
57#endif /* _RMNET_MAP_H_ */