6ee188aa79
The udp_ip4_ind bit is set only for IPv4 UDP non-fragmented packets so that the hardware can flip the checksum to 0xFFFF if the computed checksum is 0 per RFC768. However, this bit had to be set for IPv6 UDP non fragmented packets as well per hardware requirements. Otherwise, IPv6 UDP packets with computed checksum as 0 were transmitted by hardware and were dropped in the network. In addition to setting this bit for IPv6 UDP, the field is also appropriately renamed to udp_ind as part of this change. Change-Id: Ia00e3f364e9732b182b7aebe843beb443269fd9e Signed-off-by: Chinmay Agarwal <chinagar@codeaurora.org>
151 lines
4.2 KiB
C
151 lines
4.2 KiB
C
/* Copyright (c) 2013-2017, 2020 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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#include <linux/types.h>
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#include <linux/spinlock.h>
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#include <net/rmnet_config.h>
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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_s {
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u8 command_name;
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#ifndef RMNET_USE_BIG_ENDIAN_STRUCTS
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u8 cmd_type:2;
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u8 reserved:6;
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#else
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u8 reserved:6;
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u8 cmd_type:2;
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#endif /* RMNET_USE_BIG_ENDIAN_STRUCTS */
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u16 reserved2;
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u32 transaction_id;
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union {
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u8 data[65528];
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struct {
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#ifndef RMNET_USE_BIG_ENDIAN_STRUCTS
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u16 ip_family:2;
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u16 reserved:14;
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#else
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u16 reserved:14;
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u16 ip_family:2;
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#endif /* RMNET_USE_BIG_ENDIAN_STRUCTS */
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u16 flow_control_seq_num;
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u32 qos_id;
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} flow_control;
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};
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} __aligned(1);
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struct rmnet_map_dl_checksum_trailer_s {
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unsigned char reserved_h;
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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unsigned char valid:1;
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unsigned char reserved_l:7;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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unsigned char reserved_l:7;
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unsigned char valid:1;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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unsigned short checksum_start_offset;
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unsigned short checksum_length;
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unsigned short checksum_value;
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} __aligned(1);
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struct rmnet_map_ul_checksum_header_s {
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unsigned short checksum_start_offset;
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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unsigned short checksum_insert_offset:14;
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unsigned short udp_ind:1;
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unsigned short cks_en:1;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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unsigned short cks_en:1;
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unsigned short udp_ind:1;
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unsigned short checksum_insert_offset:14;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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} __aligned(1);
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enum rmnet_map_results_e {
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RMNET_MAP_SUCCESS,
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RMNET_MAP_CONSUMED,
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RMNET_MAP_GENERAL_FAILURE,
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RMNET_MAP_NOT_ENABLED,
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RMNET_MAP_FAILED_AGGREGATION,
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RMNET_MAP_FAILED_MUX
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};
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enum rmnet_map_mux_errors_e {
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RMNET_MAP_MUX_SUCCESS,
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RMNET_MAP_MUX_INVALID_MUX_ID,
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RMNET_MAP_MUX_INVALID_PAD_LENGTH,
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RMNET_MAP_MUX_INVALID_PKT_LENGTH,
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/* This should always be the last element */
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RMNET_MAP_MUX_ENUM_LENGTH
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};
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enum rmnet_map_checksum_errors_e {
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RMNET_MAP_CHECKSUM_OK,
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RMNET_MAP_CHECKSUM_VALID_FLAG_NOT_SET,
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RMNET_MAP_CHECKSUM_VALIDATION_FAILED,
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RMNET_MAP_CHECKSUM_ERR_UNKNOWN,
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RMNET_MAP_CHECKSUM_ERR_NOT_DATA_PACKET,
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RMNET_MAP_CHECKSUM_ERR_BAD_BUFFER,
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RMNET_MAP_CHECKSUM_ERR_UNKNOWN_IP_VERSION,
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RMNET_MAP_CHECKSUM_ERR_UNKNOWN_TRANSPORT,
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RMNET_MAP_CHECKSUM_FRAGMENTED_PACKET,
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RMNET_MAP_CHECKSUM_SKIPPED,
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RMNET_MAP_CHECKSUM_SW,
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/* This should always be the last element */
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RMNET_MAP_CHECKSUM_ENUM_LENGTH
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};
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enum rmnet_map_commands_e {
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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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enum rmnet_map_agg_state_e {
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RMNET_MAP_AGG_IDLE,
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RMNET_MAP_TXFER_SCHEDULED
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};
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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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uint8_t rmnet_map_demultiplex(struct sk_buff *skb);
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struct sk_buff *rmnet_map_deaggregate(struct sk_buff *skb,
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struct rmnet_phys_ep_config *config);
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struct rmnet_map_header_s *rmnet_map_add_map_header(struct sk_buff *skb,
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int hdrlen, int pad);
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rx_handler_result_t rmnet_map_command(struct sk_buff *skb,
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struct rmnet_phys_ep_config *config);
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void rmnet_map_aggregate(struct sk_buff *skb,
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struct rmnet_phys_ep_config *config);
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int rmnet_map_checksum_downlink_packet(struct sk_buff *skb);
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int rmnet_map_checksum_uplink_packet(struct sk_buff *skb,
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struct net_device *orig_dev,
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u32 egress_data_format);
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int rmnet_ul_aggregation_skip(struct sk_buff *skb, int offset);
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enum hrtimer_restart rmnet_map_flush_packet_queue(struct hrtimer *t);
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#endif /* _RMNET_MAP_H_ */
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