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/* Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _RMNET_MAP_H_
#define _RMNET_MAP_H_
struct rmnet_map_control_command {
u8 command_name;
u8 cmd_type:2;
u8 reserved:6;
u16 reserved2;
u32 transaction_id;
union {
struct {
u16 ip_family:2;
u16 reserved:14;
__be16 flow_control_seq_num;
__be32 qos_id;
} flow_control;
u8 data[0];
};
} __aligned(1);
enum rmnet_map_commands {
RMNET_MAP_COMMAND_NONE,
RMNET_MAP_COMMAND_FLOW_DISABLE,
RMNET_MAP_COMMAND_FLOW_ENABLE,
/* These should always be the last 2 elements */
RMNET_MAP_COMMAND_UNKNOWN,
RMNET_MAP_COMMAND_ENUM_LENGTH
};
struct rmnet_map_header {
u8 pad_len:6;
u8 reserved_bit:1;
u8 cd_bit:1;
u8 mux_id;
__be16 pkt_len;
} __aligned(1);
struct rmnet_map_dl_csum_trailer {
u8 reserved1;
u8 valid:1;
u8 reserved2:7;
u16 csum_start_offset;
u16 csum_length;
__be16 csum_value;
} __aligned(1);
struct rmnet_map_ul_csum_header {
__be16 csum_start_offset;
u16 csum_insert_offset:14;
u16 udp_ip4_ind:1;
u16 csum_enabled:1;
} __aligned(1);
#define RMNET_MAP_GET_MUX_ID(Y) (((struct rmnet_map_header *) \
(Y)->data)->mux_id)
#define RMNET_MAP_GET_CD_BIT(Y) (((struct rmnet_map_header *) \
(Y)->data)->cd_bit)
#define RMNET_MAP_GET_PAD(Y) (((struct rmnet_map_header *) \
(Y)->data)->pad_len)
#define RMNET_MAP_GET_CMD_START(Y) ((struct rmnet_map_control_command *) \
((Y)->data + \
sizeof(struct rmnet_map_header)))
#define RMNET_MAP_GET_LENGTH(Y) (ntohs(((struct rmnet_map_header *) \
(Y)->data)->pkt_len))
#define RMNET_MAP_COMMAND_REQUEST 0
#define RMNET_MAP_COMMAND_ACK 1
#define RMNET_MAP_COMMAND_UNSUPPORTED 2
#define RMNET_MAP_COMMAND_INVALID 3
#define RMNET_MAP_NO_PAD_BYTES 0
#define RMNET_MAP_ADD_PAD_BYTES 1
struct sk_buff *rmnet_map_deaggregate(struct sk_buff *skb,
struct rmnet_port *port);
struct rmnet_map_header *rmnet_map_add_map_header(struct sk_buff *skb,
int hdrlen, int pad);
void rmnet_map_command(struct sk_buff *skb, struct rmnet_port *port);
int rmnet_map_checksum_downlink_packet(struct sk_buff *skb, u16 len);
void rmnet_map_checksum_uplink_packet(struct sk_buff *skb,
struct net_device *orig_dev);
#endif /* _RMNET_MAP_H_ */
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