mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-23 19:43:33 +00:00
08fb8da371
Make following changes to unblock TCP fastboot support: 1. Implement being a TCP server support 2. Introduce dedicated TCP traffic handler (get rid of UDP signature) 3. Ensure seq_num and ack_num are respected in net_send_tcp_packet function (make sure existing wget_cmd code is reflected with the fix) Signed-off-by: Dmitrii Merkurev <dimorinny@google.com> Cc: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org> Cc: Simon Glass <sjg@chromium.org> Сс: Joe Hershberger <joe.hershberger@ni.com> Сс: Ramon Fried <rfried.dev@gmail.com> Reviewed-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
305 lines
7.4 KiB
C
305 lines
7.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* TCP Support with SACK for file transfer.
|
|
*
|
|
* Copyright 2017 Duncan Hare, All rights reserved.
|
|
*/
|
|
|
|
#define TCP_ACTIVITY 127 /* Number of packets received */
|
|
/* before console progress mark */
|
|
/**
|
|
* struct ip_tcp_hdr - IP and TCP header
|
|
* @ip_hl_v: header length and version
|
|
* @ip_tos: type of service
|
|
* @ip_len: total length
|
|
* @ip_id: identification
|
|
* @ip_off: fragment offset field
|
|
* @ip_ttl: time to live
|
|
* @ip_p: protocol
|
|
* @ip_sum: checksum
|
|
* @ip_src: Source IP address
|
|
* @ip_dst: Destination IP address
|
|
* @tcp_src: TCP source port
|
|
* @tcp_dst: TCP destination port
|
|
* @tcp_seq: TCP sequence number
|
|
* @tcp_ack: TCP Acknowledgment number
|
|
* @tcp_hlen: 4 bits TCP header Length/4, 4 bits reserved, 2 more bits reserved
|
|
* @tcp_flag: flags of TCP
|
|
* @tcp_win: TCP windows size
|
|
* @tcp_xsum: Checksum
|
|
* @tcp_ugr: Pointer to urgent data
|
|
*/
|
|
struct ip_tcp_hdr {
|
|
u8 ip_hl_v;
|
|
u8 ip_tos;
|
|
u16 ip_len;
|
|
u16 ip_id;
|
|
u16 ip_off;
|
|
u8 ip_ttl;
|
|
u8 ip_p;
|
|
u16 ip_sum;
|
|
struct in_addr ip_src;
|
|
struct in_addr ip_dst;
|
|
u16 tcp_src;
|
|
u16 tcp_dst;
|
|
u32 tcp_seq;
|
|
u32 tcp_ack;
|
|
u8 tcp_hlen;
|
|
u8 tcp_flags;
|
|
u16 tcp_win;
|
|
u16 tcp_xsum;
|
|
u16 tcp_ugr;
|
|
} __packed;
|
|
|
|
#define IP_TCP_HDR_SIZE (sizeof(struct ip_tcp_hdr))
|
|
#define TCP_HDR_SIZE (IP_TCP_HDR_SIZE - IP_HDR_SIZE)
|
|
|
|
#define TCP_DATA 0x00 /* Data Packet - internal use only */
|
|
#define TCP_FIN 0x01 /* Finish flag */
|
|
#define TCP_SYN 0x02 /* Synch (start) flag */
|
|
#define TCP_RST 0x04 /* reset flag */
|
|
#define TCP_PUSH 0x08 /* Push - Notify app */
|
|
#define TCP_ACK 0x10 /* Acknowledgment of data received */
|
|
#define TCP_URG 0x20 /* Urgent */
|
|
#define TCP_ECE 0x40 /* Congestion control */
|
|
#define TCP_CWR 0x80 /* Congestion Control */
|
|
|
|
/*
|
|
* TCP header options, Seq, MSS, and SACK
|
|
*/
|
|
|
|
#define TCP_SACK 32 /* Number of packets analyzed */
|
|
/* on leading edge of stream */
|
|
|
|
#define TCP_O_END 0x00 /* End of option list */
|
|
#define TCP_1_NOP 0x01 /* Single padding NOP */
|
|
#define TCP_O_NOP 0x01010101 /* NOPs pad to 32 bit boundary */
|
|
#define TCP_O_MSS 0x02 /* MSS Size option */
|
|
#define TCP_O_SCL 0x03 /* Window Scale option */
|
|
#define TCP_P_SACK 0x04 /* SACK permitted */
|
|
#define TCP_V_SACK 0x05 /* SACK values */
|
|
#define TCP_O_TS 0x08 /* Timestamp option */
|
|
#define TCP_OPT_LEN_2 0x02
|
|
#define TCP_OPT_LEN_3 0x03
|
|
#define TCP_OPT_LEN_4 0x04
|
|
#define TCP_OPT_LEN_6 0x06
|
|
#define TCP_OPT_LEN_8 0x08
|
|
#define TCP_OPT_LEN_A 0x0a /* Timestamp Length */
|
|
#define TCP_MSS 1460 /* Max segment size */
|
|
#define TCP_SCALE 0x01 /* Scale */
|
|
|
|
/**
|
|
* struct tcp_mss - TCP option structure for MSS (Max segment size)
|
|
* @kind: Field ID
|
|
* @len: Field length
|
|
* @mss: Segment size value
|
|
*/
|
|
struct tcp_mss {
|
|
u8 kind;
|
|
u8 len;
|
|
u16 mss;
|
|
} __packed;
|
|
|
|
/**
|
|
* struct tcp_scale - TCP option structure for Windows scale
|
|
* @kind: Field ID
|
|
* @len: Field length
|
|
* @scale: windows shift value used for networks with many hops.
|
|
* Typically 4 or more hops
|
|
*/
|
|
struct tcp_scale {
|
|
u8 kind;
|
|
u8 len;
|
|
u8 scale;
|
|
} __packed;
|
|
|
|
/**
|
|
* struct tcp_sack_p - TCP option structure for SACK permitted
|
|
* @kind: Field ID
|
|
* @len: Field length
|
|
*/
|
|
struct tcp_sack_p {
|
|
u8 kind;
|
|
u8 len;
|
|
} __packed;
|
|
|
|
/**
|
|
* struct sack_edges - structure for SACK edges
|
|
* @l: Left edge of stream
|
|
* @r: right edge of stream
|
|
*/
|
|
struct sack_edges {
|
|
u32 l;
|
|
u32 r;
|
|
} __packed;
|
|
|
|
#define TCP_SACK_SIZE (sizeof(struct sack_edges))
|
|
|
|
/*
|
|
* A TCP stream has holes when packets are missing or disordered.
|
|
* A hill is the inverse of a hole, and is data received.
|
|
* TCP received hills (a sequence of data), and inferrs Holes
|
|
* from the "hills" or packets received.
|
|
*/
|
|
|
|
#define TCP_SACK_HILLS 4
|
|
|
|
/**
|
|
* struct tcp_sack_v - TCP option structure for SACK
|
|
* @kind: Field ID
|
|
* @len: Field length
|
|
* @hill: L & R window edges
|
|
*/
|
|
struct tcp_sack_v {
|
|
u8 kind;
|
|
u8 len;
|
|
struct sack_edges hill[TCP_SACK_HILLS];
|
|
} __packed;
|
|
|
|
/**
|
|
* struct tcp_t_opt - TCP option structure for time stamps
|
|
* @kind: Field ID
|
|
* @len: Field length
|
|
* @t_snd: Sender timestamp
|
|
* @t_rcv: Receiver timestamp
|
|
*/
|
|
struct tcp_t_opt {
|
|
u8 kind;
|
|
u8 len;
|
|
u32 t_snd;
|
|
u32 t_rcv;
|
|
} __packed;
|
|
|
|
#define TCP_TSOPT_SIZE (sizeof(struct tcp_t_opt))
|
|
|
|
/*
|
|
* ip tcp structure with options
|
|
*/
|
|
|
|
/**
|
|
* struct ip_tcp_hdr_o - IP + TCP header + TCP options
|
|
* @hdr: IP + TCP header
|
|
* @mss: TCP MSS Option
|
|
* @scale: TCP Windows Scale Option
|
|
* @sack_p: TCP Sack-Permitted Option
|
|
* @t_opt: TCP Timestamp Option
|
|
* @end: end of options
|
|
*/
|
|
struct ip_tcp_hdr_o {
|
|
struct ip_tcp_hdr hdr;
|
|
struct tcp_mss mss;
|
|
struct tcp_scale scale;
|
|
struct tcp_sack_p sack_p;
|
|
struct tcp_t_opt t_opt;
|
|
u8 end;
|
|
} __packed;
|
|
|
|
#define IP_TCP_O_SIZE (sizeof(struct ip_tcp_hdr_o))
|
|
|
|
/**
|
|
* struct ip_tcp_hdr_s - IP + TCP header + TCP options
|
|
* @hdr: IP + TCP header
|
|
* @t_opt: TCP Timestamp Option
|
|
* @sack_v: TCP SACK Option
|
|
* @end: end of options
|
|
*/
|
|
struct ip_tcp_hdr_s {
|
|
struct ip_tcp_hdr hdr;
|
|
struct tcp_t_opt t_opt;
|
|
struct tcp_sack_v sack_v;
|
|
u8 end;
|
|
} __packed;
|
|
|
|
#define IP_TCP_SACK_SIZE (sizeof(struct ip_tcp_hdr_s))
|
|
|
|
/*
|
|
* TCP pseudo header definitions
|
|
*/
|
|
#define PSEUDO_PAD_SIZE 8
|
|
|
|
/**
|
|
* struct pseudo_hdr - Pseudo Header
|
|
* @padding: pseudo hdr size = ip_tcp hdr size
|
|
* @p_src: Source IP address
|
|
* @p_dst: Destination IP address
|
|
* @rsvd: reserved
|
|
* @p: protocol
|
|
* @len: length of header
|
|
*/
|
|
struct pseudo_hdr {
|
|
u8 padding[PSEUDO_PAD_SIZE];
|
|
struct in_addr p_src;
|
|
struct in_addr p_dst;
|
|
u8 rsvd;
|
|
u8 p;
|
|
u16 len;
|
|
} __packed;
|
|
|
|
#define PSEUDO_HDR_SIZE (sizeof(struct pseudo_hdr)) - PSEUDO_PAD_SIZE
|
|
|
|
/**
|
|
* union tcp_build_pkt - union for building TCP/IP packet.
|
|
* @ph: pseudo header
|
|
* @ip: IP and TCP header plus TCP options
|
|
* @sack: IP and TCP header plus SACK options
|
|
* @raw: buffer
|
|
*
|
|
* Build Pseudo header in packed buffer
|
|
* first, calculate TCP checksum, then build IP header in packed buffer.
|
|
*
|
|
*/
|
|
union tcp_build_pkt {
|
|
struct pseudo_hdr ph;
|
|
struct ip_tcp_hdr_o ip;
|
|
struct ip_tcp_hdr_s sack;
|
|
uchar raw[1600];
|
|
} __packed;
|
|
|
|
/**
|
|
* enum tcp_state - TCP State machine states for connection
|
|
* @TCP_CLOSED: Need to send SYN to connect
|
|
* @TCP_SYN_SENT: Trying to connect, waiting for SYN ACK
|
|
* @TCP_SYN_RECEIVED: Initial SYN received, waiting for ACK
|
|
* @TCP_ESTABLISHED: both server & client have a connection
|
|
* @TCP_CLOSE_WAIT: Rec FIN, passed to app for FIN, ACK rsp
|
|
* @TCP_CLOSING: Rec FIN, sent FIN, ACK waiting for ACK
|
|
* @TCP_FIN_WAIT_1: Sent FIN waiting for response
|
|
* @TCP_FIN_WAIT_2: Rec ACK from FIN sent, waiting for FIN
|
|
*/
|
|
enum tcp_state {
|
|
TCP_CLOSED,
|
|
TCP_SYN_SENT,
|
|
TCP_SYN_RECEIVED,
|
|
TCP_ESTABLISHED,
|
|
TCP_CLOSE_WAIT,
|
|
TCP_CLOSING,
|
|
TCP_FIN_WAIT_1,
|
|
TCP_FIN_WAIT_2
|
|
};
|
|
|
|
enum tcp_state tcp_get_tcp_state(void);
|
|
void tcp_set_tcp_state(enum tcp_state new_state);
|
|
int tcp_set_tcp_header(uchar *pkt, int dport, int sport, int payload_len,
|
|
u8 action, u32 tcp_seq_num, u32 tcp_ack_num);
|
|
|
|
/**
|
|
* rxhand_tcp() - An incoming packet handler.
|
|
* @pkt: pointer to the application packet
|
|
* @dport: destination TCP port
|
|
* @sip: source IP address
|
|
* @sport: source TCP port
|
|
* @tcp_seq_num: TCP sequential number
|
|
* @tcp_ack_num: TCP acknowledgment number
|
|
* @action: TCP action (SYN, ACK, FIN, etc)
|
|
* @len: packet length
|
|
*/
|
|
typedef void rxhand_tcp(uchar *pkt, u16 dport,
|
|
struct in_addr sip, u16 sport,
|
|
u32 tcp_seq_num, u32 tcp_ack_num,
|
|
u8 action, unsigned int len);
|
|
void tcp_set_tcp_handler(rxhand_tcp *f);
|
|
|
|
void rxhand_tcp_f(union tcp_build_pkt *b, unsigned int len);
|
|
|
|
u16 tcp_set_pseudo_header(uchar *pkt, struct in_addr src, struct in_addr dest,
|
|
int tcp_len, int pkt_len);
|