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