[PATCH v8 06/13] net/tcp: improve tcp framework, use better state machine
Mikhail Kshevetskiy
mikhail.kshevetskiy at iopsys.eu
Wed Sep 25 03:40:51 CEST 2024
Changes:
* Fix initial send sequence always zero issue
* Use state machine close to RFC 9293. This should make TCP
transfers more reliable (now we can upload a huge array
of data from the board to external server)
* Improve TCP framework a lot. This should make tcp client
code much more simple.
* rewrite wget with new tcp stack
* rewrite fastboot_tcp with new tcp stack
It's quite hard to fix the initial send sequence (ISS) issue
with the separate patch. A naive attempt to fix an issue
inside the tcp_set_tcp_header() function will break tcp packet
retransmit logic in wget and other clients.
Example:
Wget stores tcp_seq_num value before tcp_set_tcp_header() will
be called and (on failure) retransmit the packet with the stored
tcp_seq_num value. Thus:
* the same ISS must allways be used (current case)
* or tcp clients needs to generate a proper ISS when
required.
A proper ISS fix will require a big redesing comparable with
a this one.
Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy at iopsys.eu>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
include/net/tcp.h | 194 ++++++++--
include/net/wget.h | 8 -
net/fastboot_tcp.c | 193 +++++-----
net/net.c | 4 +
net/tcp.c | 858 ++++++++++++++++++++++++++++++++++-----------
net/wget.c | 464 +++++++-----------------
6 files changed, 1042 insertions(+), 679 deletions(-)
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 0694af9d5b1..cf4a6a812f4 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -265,6 +265,7 @@ union tcp_build_pkt {
* @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
+ * @TCP_LAST_ACK: Waiting for ACK of the connection termination
*/
enum tcp_state {
TCP_CLOSED,
@@ -274,7 +275,20 @@ enum tcp_state {
TCP_CLOSE_WAIT,
TCP_CLOSING,
TCP_FIN_WAIT_1,
- TCP_FIN_WAIT_2
+ TCP_FIN_WAIT_2,
+ TCP_LAST_ACK,
+};
+
+/**
+ * enum tcp_status - TCP stream status for connection
+ * @TCP_ERR_OK: no rx/tx errors
+ * @TCP_ERR_TOUT: rx/tx timeout happened
+ * @TCP_ERR_RST: connection was reset
+ */
+enum tcp_status {
+ TCP_ERR_OK = 0,
+ TCP_ERR_TOUT,
+ TCP_ERR_RST,
};
/**
@@ -283,51 +297,150 @@ enum tcp_state {
* @rport: Remote port, host byte order
* @lport: Local port, host byte order
*
+ * @priv: User private data (not used by tcp module)
+ *
+ * @max_retry_count: Maximum retransmit attempts (default 3)
+ * @initial_timeout: Timeout from initial TX to reTX (default 2 sec)
+ * @rx_inactiv_timeout: Maximum time from last rx till connection drop
+ * (default 30 sec)
+ *
+ * @on_closed: User callback, called just before destroying TCP stream
+ * @on_established: User callback, called when TCP stream enters
+ * TCP_ESTABLISHED state
+ * @on_rcv_nxt_update: User callback, called when all data in the segment
+ * [0..rx_bytes - 1] was received
+ * @on_snd_una_update: User callback, called when all data in the segment
+ * [0..tx_bytes - 1] were transferred and acknowledged
+ * @rx: User callback, called on receive of segment
+ * [rx_offs..rx_offs+len-1]. If NULL -- all incoming data
+ * will be ignored. User SHOULD store the segment and
+ * return the number of accepted bytes.
+ * WARNING: Previous segmengs may not be received yet
+ * @tx: User callback, called on transmit/retransmit of segment
+ * [tx_offs..tx_offs+maxlen-1]. If NULL -- no data will
+ * be transmitted. User SHOULD fill provided buffer and
+ * return the number of bytes in the buffer.
+ * WARNING: do not use tcp_stream_close() from this
+ * callback (it will break stream). Better use
+ * on_snd_una_update() callback for such purposes.
+ *
+ * @time_last_rx: Arrival time of last valid incoming package (ticks)
+ * @time_start: Timeout start time (ticks)
+ * @time_delta: Timeout duration (ticks)
+ * @time_handler Timeout handler for a stream
+ *
* @state: TCP connection state
+ * @status: TCP stream status (OK or ERR)
+ *
+ * @fin_rx: Non-zero if TCP_FIN was received
+ * @fin_rx_seq: TCP sequence of rx FIN bit
+ * @fin_tx: Non-zero if TCP_FIN was sent (or planned to send)
+ * @fin_tx_seq: TCP sequence of tx FIN bit
+ *
+ * @iss: Initial send sequence number
+ * @snd_una: Send unacknowledged
+ * @snd_nxt: Send next
+ * @snd_wnd: Send window (in bytes)
+ * @snd_wl1: Segment sequence number used for last window update
+ * @snd_wl2: Segment acknowledgment number used for last window update
*
* @irs: Initial receive sequence number
* @rcv_nxt: Receive next
+ * @rcv_wnd: Receive window (in bytes)
*
* @loc_timestamp: Local timestamp
* @rmt_timestamp: Remote timestamp
*
+ * @rmt_win_scale: Remote window scale factor
+ *
* @lost: Used for SACK
+ *
+ * @retry_cnt: Number of retry attempts remaining. Only SYN, FIN
+ * or DATA segments are tried to retransmit.
+ * @retry_timeout: Current retry timeout (ms)
+ * @retry_action: TCP flags used for sending
+ * @retry_seq_num: TCP sequence for retransmit
+ * retry_tx_len: Number of data to transmit
+ * @retry_tx_offs: Position in the TX stream
*/
struct tcp_stream {
struct in_addr rhost;
u16 rport;
u16 lport;
- /* TCP connection state */
+ void *priv;
+
+ int max_retry_count;
+ int initial_timeout;
+ int rx_inactiv_timeout;
+
+ void (*on_closed)(struct tcp_stream *tcp);
+ void (*on_established)(struct tcp_stream *tcp);
+ void (*on_rcv_nxt_update)(struct tcp_stream *tcp, u32 rx_bytes);
+ void (*on_snd_una_update)(struct tcp_stream *tcp, u32 tx_bytes);
+ u32 (*rx)(struct tcp_stream *tcp, u32 rx_offs, void *buf, u32 len);
+ u32 (*tx)(struct tcp_stream *tcp, u32 tx_offs, void *buf, u32 maxlen);
+
+ ulong time_last_rx;
+ ulong time_start;
+ ulong time_delta;
+ void (*time_handler)(struct tcp_stream *tcp);
+
enum tcp_state state;
+ enum tcp_status status;
+
+ int fin_rx;
+ u32 fin_rx_seq;
+
+ int fin_tx;
+ u32 fin_tx_seq;
+
+ u32 iss;
+ u32 snd_una;
+ u32 snd_nxt;
+ u32 snd_wnd;
+ u32 snd_wl1;
+ u32 snd_wl2;
u32 irs;
u32 rcv_nxt;
+ u32 rcv_wnd;
/* TCP option timestamp */
u32 loc_timestamp;
u32 rmt_timestamp;
+ /* TCP window scale */
+ u8 rmt_win_scale;
+
/* TCP sliding window control used to request re-TX */
struct tcp_sack_v lost;
+
+ /* used for data retransmission */
+ int retry_cnt;
+ int retry_timeout;
+ u8 retry_action;
+ u32 retry_seq_num;
+ u32 retry_tx_len;
+ u32 retry_tx_offs;
};
void tcp_init(void);
-typedef int tcp_incoming_filter(struct in_addr rhost,
- u16 rport, u16 sport);
-
/*
- * This function sets user callback used to accept/drop incoming
- * connections. Callback should:
+ * This function sets user callback called on TCP stream creation.
+ * Callback should:
* + Check TCP stream endpoint and make connection verdict
* - return non-zero value to accept connection
* - return zero to drop connection
+ * + Setup TCP stream callbacks like: on_closed(), on_established(),
+ * n_rcv_nxt_update(), on_snd_una_update(), rx() and tx().
+ * + Setup other stream related data
*
- * WARNING: If callback is NOT defined, all incoming connections
- * will be dropped.
+ * WARNING: User MUST setup TCP stream on_create handler. Without it
+ * no connection (including outgoung) will be created.
*/
-void tcp_set_incoming_filter(tcp_incoming_filter *filter);
+void tcp_stream_set_on_create_handler(int (*on_create)(struct tcp_stream *));
/*
* tcp_stream_get -- Get or create TCP stream
@@ -351,27 +464,52 @@ struct tcp_stream *tcp_stream_get(int is_new, struct in_addr rhost,
*/
struct tcp_stream *tcp_stream_connect(struct in_addr rhost, u16 rport);
-enum tcp_state tcp_stream_get_state(struct tcp_stream *tcp);
+/*
+ * tcp_stream_put -- Return stream to a TCP subsystem. Subsystem will
+ * check stream and destroy it (if stream was already
+ * closed). Otherwize no stream change will happen.
+ * @tcp: TCP stream to put
+ */
+void tcp_stream_put(struct tcp_stream *tcp);
-int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int payload_len,
- u8 action, u32 tcp_seq_num, u32 tcp_ack_num);
+/*
+ * tcp_stream_restart_rx_timer -- Restart RX inactivity timer. Usually there
+ * is no needs to call this function. Timer
+ * will be restarted on receiving of any valid
+ * tcp packet belonging to a stream.
+ *
+ * This function may be used to prevent connection
+ * break in the following case:
+ * - u-boot is busy with very long data processing
+ * - remote side waits for u-boot reply
+ *
+ * @tcp: TCP stream to put
+ */
+void tcp_stream_restart_rx_timer(struct tcp_stream *tcp);
-/**
- * rxhand_tcp() - An incoming packet handler.
- * @tcp: TCP stream
- * @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
+enum tcp_state tcp_stream_get_state(struct tcp_stream *tcp);
+enum tcp_status tcp_stream_get_status(struct tcp_stream *tcp);
+
+
+/*
+ * tcp_stream_rx_offs(),
+ * tcp_stream_tx_offs() -- Returns offset of first unacknowledged byte
+ * in receive/transmit stream correspondingly.
+ * The result is NOT affected by sin/fin flags.
+ * @tcp: TCP stream
*/
-typedef void rxhand_tcp(struct tcp_stream *tcp, uchar *pkt,
- u32 tcp_seq_num, u32 tcp_ack_num,
- u8 action, unsigned int len);
-void tcp_set_tcp_handler(rxhand_tcp *f);
+u32 tcp_stream_rx_offs(struct tcp_stream *tcp);
+u32 tcp_stream_tx_offs(struct tcp_stream *tcp);
+
+/* reset tcp stream */
+void tcp_stream_reset(struct tcp_stream *tcp);
+/* force TCP stream closing, do NOT use from tcp->tx callback */
+void tcp_stream_close(struct tcp_stream *tcp);
+
+void tcp_streams_poll(void);
+
+int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int payload_len,
+ u8 action, u32 tcp_seq_num, u32 tcp_ack_num);
void rxhand_tcp_f(union tcp_build_pkt *b, unsigned int len);
diff --git a/include/net/wget.h b/include/net/wget.h
index 6714f7ea573..9a423b30414 100644
--- a/include/net/wget.h
+++ b/include/net/wget.h
@@ -8,14 +8,6 @@
*/
void wget_start(void);
-enum wget_state {
- WGET_CLOSED,
- WGET_CONNECTING,
- WGET_CONNECTED,
- WGET_TRANSFERRING,
- WGET_TRANSFERRED
-};
-
#define DEBUG_WGET 0 /* Set to 1 for debug messages */
#define WGET_RETRY_COUNT 30
#define WGET_TIMEOUT 2000UL
diff --git a/net/fastboot_tcp.c b/net/fastboot_tcp.c
index 4d34fdc5a45..101d598012e 100644
--- a/net/fastboot_tcp.c
+++ b/net/fastboot_tcp.c
@@ -10,140 +10,109 @@
#define FASTBOOT_TCP_PORT 5554
-static char command[FASTBOOT_COMMAND_LEN];
-static char response[FASTBOOT_RESPONSE_LEN];
-
static const unsigned short handshake_length = 4;
static const uchar *handshake = "FB01";
-static u32 curr_tcp_seq_num;
-static u32 curr_tcp_ack_num;
-static unsigned int curr_request_len;
-static enum fastboot_tcp_state {
- FASTBOOT_CLOSED,
- FASTBOOT_CONNECTED,
- FASTBOOT_DISCONNECTING
-} state = FASTBOOT_CLOSED;
-
-static void fastboot_tcp_answer(struct tcp_stream *tcp, u8 action,
- unsigned int len)
-{
- const u32 response_seq_num = curr_tcp_ack_num;
- const u32 response_ack_num = curr_tcp_seq_num +
- (curr_request_len > 0 ? curr_request_len : 1);
+static char rxbuf[sizeof(u64) + FASTBOOT_COMMAND_LEN + 1];
+static char txbuf[sizeof(u64) + FASTBOOT_RESPONSE_LEN + 1];
- net_send_tcp_packet(len, tcp->rhost, tcp->rport, tcp->lport,
- action, response_seq_num, response_ack_num);
-}
+static u32 data_read;
+static u32 tx_last_offs, tx_last_len;
-static void fastboot_tcp_reset(struct tcp_stream *tcp)
+static void tcp_stream_on_rcv_nxt_update(struct tcp_stream *tcp, u32 rx_bytes)
{
- fastboot_tcp_answer(tcp, TCP_RST, 0);
- state = FASTBOOT_CLOSED;
-}
+ u64 cmd_size;
+ __be64 len_be;
+ char saved;
+ int fastboot_command_id, len;
+
+ if (!data_read && rx_bytes >= handshake_length) {
+ if (memcmp(rxbuf, handshake, handshake_length)) {
+ printf("fastboot: bad handshake\n");
+ tcp_stream_close(tcp);
+ return;
+ }
-static void fastboot_tcp_send_packet(struct tcp_stream *tcp, u8 action,
- const uchar *data, unsigned int len)
-{
- uchar *pkt = net_get_async_tx_pkt_buf();
+ tx_last_offs = 0;
+ tx_last_len = handshake_length;
+ memcpy(txbuf, handshake, handshake_length);
+
+ data_read += handshake_length;
+ rx_bytes -= handshake_length;
+ if (rx_bytes > 0)
+ memmove(rxbuf, rxbuf + handshake_length, rx_bytes);
+ return;
+ }
- memset(pkt, '\0', PKTSIZE);
- pkt += net_eth_hdr_size() + IP_TCP_HDR_SIZE + TCP_TSOPT_SIZE + 2;
- memcpy(pkt, data, len);
- fastboot_tcp_answer(tcp, action, len);
- memset(pkt, '\0', PKTSIZE);
+ if (rx_bytes < sizeof(u64))
+ return;
+
+ memcpy(&cmd_size, rxbuf, sizeof(u64));
+ cmd_size = __be64_to_cpu(cmd_size);
+ if (rx_bytes < sizeof(u64) + cmd_size)
+ return;
+
+ saved = rxbuf[sizeof(u64) + cmd_size];
+ rxbuf[sizeof(u64) + cmd_size] = '\0';
+ fastboot_command_id = fastboot_handle_command(rxbuf + sizeof(u64),
+ txbuf + sizeof(u64));
+ fastboot_handle_boot(fastboot_command_id,
+ strncmp("OKAY", txbuf + sizeof(u64), 4) != 0);
+ rxbuf[sizeof(u64) + cmd_size] = saved;
+
+ len = strlen(txbuf + sizeof(u64));
+ len_be = __cpu_to_be64(len);
+ memcpy(txbuf, &len_be, sizeof(u64));
+
+ tx_last_offs += tx_last_len;
+ tx_last_len = len + sizeof(u64);
+
+ data_read += sizeof(u64) + cmd_size;
+ rx_bytes -= sizeof(u64) + cmd_size;
+ if (rx_bytes > 0)
+ memmove(rxbuf, rxbuf + sizeof(u64) + cmd_size, rx_bytes);
}
-static void fastboot_tcp_send_message(struct tcp_stream *tcp,
- const char *message, unsigned int len)
+static u32 tcp_stream_rx(struct tcp_stream *tcp, u32 rx_offs, void *buf, u32 len)
{
- __be64 len_be = __cpu_to_be64(len);
- uchar *pkt = net_get_async_tx_pkt_buf();
-
- memset(pkt, '\0', PKTSIZE);
- pkt += net_eth_hdr_size() + IP_TCP_HDR_SIZE + TCP_TSOPT_SIZE + 2;
- // Put first 8 bytes as a big endian message length
- memcpy(pkt, &len_be, 8);
- pkt += 8;
- memcpy(pkt, message, len);
- fastboot_tcp_answer(tcp, TCP_ACK | TCP_PUSH, len + 8);
- memset(pkt, '\0', PKTSIZE);
+ memcpy(rxbuf + rx_offs - data_read, buf, len);
+
+ return len;
}
-static void fastboot_tcp_handler_ipv4(struct tcp_stream *tcp, uchar *pkt,
- u32 tcp_seq_num, u32 tcp_ack_num,
- u8 action, unsigned int len)
+static u32 tcp_stream_tx(struct tcp_stream *tcp, u32 tx_offs, void *buf, u32 maxlen)
{
- int fastboot_command_id;
- u64 command_size;
- u8 tcp_fin = action & TCP_FIN;
- u8 tcp_push = action & TCP_PUSH;
-
- curr_tcp_seq_num = tcp_seq_num;
- curr_tcp_ack_num = tcp_ack_num;
- curr_request_len = len;
-
- switch (state) {
- case FASTBOOT_CLOSED:
- if (tcp_push) {
- if (len != handshake_length ||
- strlen(pkt) != handshake_length ||
- memcmp(pkt, handshake, handshake_length) != 0) {
- fastboot_tcp_reset(tcp);
- break;
- }
- fastboot_tcp_send_packet(tcp, TCP_ACK | TCP_PUSH,
- handshake, handshake_length);
- state = FASTBOOT_CONNECTED;
- }
- break;
- case FASTBOOT_CONNECTED:
- if (tcp_fin) {
- fastboot_tcp_answer(tcp, TCP_FIN | TCP_ACK, 0);
- state = FASTBOOT_DISCONNECTING;
- break;
- }
- if (tcp_push) {
- // First 8 bytes is big endian message length
- command_size = __be64_to_cpu(*(u64 *)pkt);
- len -= 8;
- pkt += 8;
-
- // Only single packet messages are supported ATM
- if (strlen(pkt) != command_size) {
- fastboot_tcp_reset(tcp);
- break;
- }
- strlcpy(command, pkt, len + 1);
- fastboot_command_id = fastboot_handle_command(command, response);
- fastboot_tcp_send_message(tcp, response, strlen(response));
- fastboot_handle_boot(fastboot_command_id,
- strncmp("OKAY", response, 4) == 0);
- }
- break;
- case FASTBOOT_DISCONNECTING:
- if (tcp_push)
- state = FASTBOOT_CLOSED;
- break;
- }
+ /* by design: tx_offs >= tx_last_offs */
+ if (tx_offs >= tx_last_offs + tx_last_len)
+ return 0;
- memset(command, 0, FASTBOOT_COMMAND_LEN);
- memset(response, 0, FASTBOOT_RESPONSE_LEN);
- curr_tcp_seq_num = 0;
- curr_tcp_ack_num = 0;
- curr_request_len = 0;
+ maxlen = tx_last_offs + tx_last_len - tx_offs;
+ memcpy(buf, txbuf + (tx_offs - tx_last_offs), maxlen);
+
+ return maxlen;
}
-static int incoming_filter(struct in_addr rhost, u16 rport, u16 lport)
+static int tcp_stream_on_create(struct tcp_stream *tcp)
{
- return (lport == FASTBOOT_TCP_PORT);
+ if (tcp->lport != FASTBOOT_TCP_PORT)
+ return 0;
+
+ data_read = 0;
+ tx_last_offs = 0;
+ tx_last_len = 0;
+
+ tcp->on_rcv_nxt_update = tcp_stream_on_rcv_nxt_update;
+ tcp->rx = tcp_stream_rx;
+ tcp->tx = tcp_stream_tx;
+
+ return 1;
}
void fastboot_tcp_start_server(void)
{
+ memset(net_server_ethaddr, 0, 6);
+ tcp_stream_set_on_create_handler(tcp_stream_on_create);
+
printf("Using %s device\n", eth_get_name());
printf("Listening for fastboot command on tcp %pI4\n", &net_ip);
-
- tcp_set_incoming_filter(incoming_filter);
- tcp_set_tcp_handler(fastboot_tcp_handler_ipv4);
}
diff --git a/net/net.c b/net/net.c
index b33ea59a9fa..86182cc504e 100644
--- a/net/net.c
+++ b/net/net.c
@@ -646,6 +646,9 @@ restart:
* errors that may have happened.
*/
eth_rx();
+#if defined(CONFIG_PROT_TCP)
+ tcp_streams_poll();
+#endif
/*
* Abort if ctrl-c was pressed.
@@ -952,6 +955,7 @@ int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
+ tcp_set_tcp_header(tcp, pkt + eth_hdr_size,
payload_len, action, tcp_seq_num,
tcp_ack_num);
+ tcp_stream_put(tcp);
break;
#endif
default:
diff --git a/net/tcp.c b/net/tcp.c
index 7e445eaffd6..57d6acf2dc5 100644
--- a/net/tcp.c
+++ b/net/tcp.c
@@ -24,9 +24,26 @@
#include <net.h>
#include <net/tcp.h>
-static int tcp_activity_count;
+/*
+ * The start sequence number increment for the two sequently created
+ * connections within the same timer tick. This number must be:
+ * - prime (to increase the time before the same number will be generated)
+ * - larger than typical MTU (to avoid similar numbers for two sequently
+ * created connections)
+ */
+#define TCP_START_SEQ_INC 2153 /* just large prime number */
+
+#define TCP_SEND_RETRY 3
+#define TCP_SEND_TIMEOUT 2000UL
+#define TCP_RX_INACTIVE_TIMEOUT 30000UL
+#define TCP_RCV_WND_SIZE (PKTBUFSRX * TCP_MSS)
+
+#define TCP_PACKET_OK 0
+#define TCP_PACKET_DROP 1
+
static struct tcp_stream tcp_stream;
-static tcp_incoming_filter *incoming_filter;
+
+static int (*tcp_stream_on_create)(struct tcp_stream *tcp);
/*
* TCP lengths are stored as a rounded up number of 32 bit words.
@@ -35,12 +52,10 @@ static tcp_incoming_filter *incoming_filter;
*/
#define LEN_B_TO_DW(x) ((x) >> 2)
#define ROUND_TCPHDR_LEN(x) (LEN_B_TO_DW((x) + 3))
+#define ROUND_TCPHDR_BYTES(x) (((x) + 3) & ~3)
#define SHIFT_TO_TCPHDRLEN_FIELD(x) ((x) << 4)
#define GET_TCP_HDR_LEN_IN_BYTES(x) ((x) >> 2)
-/* Current TCP RX packet handler */
-static rxhand_tcp *tcp_packet_handler;
-
#define RANDOM_PORT_START 1024
#define RANDOM_PORT_RANGE 0x4000
@@ -62,6 +77,22 @@ static inline s32 tcp_seq_cmp(u32 a, u32 b)
return (s32)(a - b);
}
+static inline u32 tcp_get_start_seq(void)
+{
+ static u32 tcp_seq_inc;
+ u32 tcp_seq;
+
+ tcp_seq = (get_timer(0) & 0xffffffff) + tcp_seq_inc;
+ tcp_seq_inc += TCP_START_SEQ_INC;
+
+ return tcp_seq;
+}
+
+static inline ulong msec_to_ticks(ulong msec)
+{
+ return msec * CONFIG_SYS_HZ / 1000;
+}
+
/**
* tcp_stream_get_state() - get TCP stream state
* @tcp: tcp stream
@@ -84,31 +115,90 @@ static void tcp_stream_set_state(struct tcp_stream *tcp,
tcp->state = new_state;
}
-void tcp_init(void)
+/**
+ * tcp_stream_get_status() - get TCP stream status
+ * @tcp: tcp stream
+ *
+ * Return: TCP stream status
+ */
+enum tcp_status tcp_stream_get_status(struct tcp_stream *tcp)
{
- incoming_filter = NULL;
- tcp_stream.state = TCP_CLOSED;
+ return tcp->status;
}
-void tcp_set_incoming_filter(tcp_incoming_filter *filter)
+/**
+ * tcp_stream_set_status() - set TCP stream state
+ * @tcp: tcp stream
+ * @new_satus: new TCP stream status
+ */
+static void tcp_stream_set_status(struct tcp_stream *tcp,
+ enum tcp_state new_status)
{
- incoming_filter = filter;
+ tcp->status = new_status;
}
-static struct tcp_stream *tcp_stream_add(struct in_addr rhost,
- u16 rport, u16 lport)
+void tcp_stream_restart_rx_timer(struct tcp_stream *tcp)
{
- struct tcp_stream *tcp = &tcp_stream;
-
- if (tcp->state != TCP_CLOSED)
- return NULL;
+ tcp->time_last_rx = get_timer(0);
+}
+static void tcp_stream_init(struct tcp_stream *tcp,
+ struct in_addr rhost, u16 rport, u16 lport)
+{
memset(tcp, 0, sizeof(struct tcp_stream));
tcp->rhost.s_addr = rhost.s_addr;
tcp->rport = rport;
tcp->lport = lport;
tcp->state = TCP_CLOSED;
tcp->lost.len = TCP_OPT_LEN_2;
+ tcp->rcv_wnd = TCP_RCV_WND_SIZE;
+ tcp->max_retry_count = TCP_SEND_RETRY;
+ tcp->initial_timeout = TCP_SEND_TIMEOUT;
+ tcp->rx_inactiv_timeout = TCP_RX_INACTIVE_TIMEOUT;
+ tcp_stream_restart_rx_timer(tcp);
+}
+
+static void tcp_stream_destroy(struct tcp_stream *tcp)
+{
+ if (tcp->on_closed)
+ tcp->on_closed(tcp);
+ memset(tcp, 0, sizeof(struct tcp_stream));
+}
+
+void tcp_init(void)
+{
+ static int initialized;
+ struct tcp_stream *tcp = &tcp_stream;
+
+ tcp_stream_on_create = NULL;
+ if (!initialized) {
+ initialized = 1;
+ memset(tcp, 0, sizeof(struct tcp_stream));
+ }
+
+ tcp_stream_set_state(tcp, TCP_CLOSED);
+ tcp_stream_set_status(tcp, TCP_ERR_RST);
+ tcp_stream_destroy(tcp);
+}
+
+void tcp_stream_set_on_create_handler(int (*on_create)(struct tcp_stream *))
+{
+ tcp_stream_on_create = on_create;
+}
+
+static struct tcp_stream *tcp_stream_add(struct in_addr rhost,
+ u16 rport, u16 lport)
+{
+ struct tcp_stream *tcp = &tcp_stream;
+
+ if (!tcp_stream_on_create ||
+ tcp->state != TCP_CLOSED)
+ return NULL;
+
+ tcp_stream_init(tcp, rhost, rport, lport);
+ if (!tcp_stream_on_create(tcp))
+ return NULL;
+
return tcp;
}
@@ -122,30 +212,205 @@ struct tcp_stream *tcp_stream_get(int is_new, struct in_addr rhost,
tcp->lport == lport)
return tcp;
- if (!is_new || !incoming_filter) ||
- !incoming_filter(rhost, rport, lport))
- return NULL;
+ return is_new ? tcp_stream_add(rhost, rport, lport) : NULL;
+}
- return tcp_stream_add(rhost, rport, lport);
+void tcp_stream_put(struct tcp_stream *tcp)
+{
+ if (tcp->state == TCP_CLOSED)
+ tcp_stream_destroy(tcp);
}
-static void dummy_handler(struct tcp_stream *tcp, uchar *pkt,
- u32 tcp_seq_num, u32 tcp_ack_num,
- u8 action, unsigned int len)
+u32 tcp_stream_rx_offs(struct tcp_stream *tcp)
{
+ u32 ret;
+
+ switch (tcp->state) {
+ case TCP_CLOSED:
+ case TCP_SYN_SENT:
+ case TCP_SYN_RECEIVED:
+ return 0;
+ default:
+ break;
+ }
+
+ ret = tcp->rcv_nxt - tcp->irs - 1;
+ if (tcp->fin_rx && (tcp->rcv_nxt == tcp->fin_rx_seq))
+ ret--;
+
+ return ret;
}
-/**
- * tcp_set_tcp_handler() - set a handler to receive data
- * @f: handler
- */
-void tcp_set_tcp_handler(rxhand_tcp *f)
+u32 tcp_stream_tx_offs(struct tcp_stream *tcp)
{
- debug_cond(DEBUG_INT_STATE, "--- net_loop TCP handler set (%p)\n", f);
- if (!f)
- tcp_packet_handler = dummy_handler;
- else
- tcp_packet_handler = f;
+ u32 ret;
+
+ switch (tcp->state) {
+ case TCP_CLOSED:
+ case TCP_SYN_SENT:
+ case TCP_SYN_RECEIVED:
+ return 0;
+ default:
+ break;
+ }
+
+ ret = tcp->snd_una - tcp->iss - 1;
+ if (tcp->fin_tx && (tcp->snd_una == tcp->fin_tx_seq + 1))
+ ret--;
+
+ return ret;
+}
+
+static void tcp_stream_set_time_handler(struct tcp_stream *tcp, ulong msec,
+ void (*handler)(struct tcp_stream *))
+{
+ if (!msec) {
+ tcp->time_handler = NULL;
+ return;
+ }
+
+ tcp->time_handler = handler;
+ tcp->time_start = get_timer(0);
+ tcp->time_delta = msec_to_ticks(msec);
+}
+
+static void tcp_send_packet(struct tcp_stream *tcp, u8 action,
+ u32 tcp_seq_num, u32 tcp_ack_num, u32 tx_len)
+{
+ net_send_tcp_packet(tx_len, tcp->rhost, tcp->rport,
+ tcp->lport, action, tcp_seq_num,
+ tcp_ack_num);
+}
+
+static void tcp_send_repeat(struct tcp_stream *tcp)
+{
+ uchar *ptr;
+ u32 tcp_opts_size;
+
+ if (!tcp->retry_cnt) {
+ puts("\nTCP: send retry counter exceeded\n");
+ tcp_send_packet(tcp, TCP_RST, tcp->retry_seq_num,
+ tcp->rcv_nxt, 0);
+ tcp_stream_set_status(tcp, TCP_ERR_TOUT);
+ tcp_stream_set_state(tcp, TCP_CLOSED);
+ tcp_stream_destroy(tcp);
+ return;
+ }
+ tcp->retry_cnt--;
+ tcp->retry_timeout += tcp->initial_timeout;
+
+ if (tcp->retry_tx_len > 0) {
+ tcp_opts_size = ROUND_TCPHDR_BYTES(TCP_TSOPT_SIZE +
+ tcp->lost.len);
+ ptr = net_tx_packet + net_eth_hdr_size() +
+ IP_TCP_HDR_SIZE + tcp_opts_size;
+
+ if (tcp->retry_tx_len > TCP_MSS - tcp_opts_size)
+ tcp->retry_tx_len = TCP_MSS - tcp_opts_size;
+
+ /* refill packet data */
+ tcp->tx(tcp, tcp->retry_tx_offs, ptr, tcp->retry_tx_len);
+ }
+ tcp_send_packet(tcp, tcp->retry_action, tcp->retry_seq_num,
+ tcp->rcv_nxt, tcp->retry_tx_len);
+
+ tcp_stream_set_time_handler(tcp, tcp->retry_timeout, tcp_send_repeat);
+}
+
+static void tcp_send_packet_with_retry(struct tcp_stream *tcp, u8 action,
+ u32 tcp_seq_num, u32 tx_len, u32 tx_offs)
+{
+ tcp->retry_cnt = tcp->max_retry_count;
+ tcp->retry_timeout = tcp->initial_timeout;
+ tcp->retry_action = action;
+ tcp->retry_seq_num = tcp_seq_num;
+ tcp->retry_tx_len = tx_len;
+ tcp->retry_tx_offs = tx_offs;
+
+ tcp_send_packet(tcp, action, tcp_seq_num, tcp->rcv_nxt, tx_len);
+ tcp_stream_set_time_handler(tcp, tcp->retry_timeout, tcp_send_repeat);
+}
+
+static inline u8 tcp_stream_fin_needed(struct tcp_stream *tcp, u32 tcp_seq_num)
+{
+ return (tcp->fin_tx && (tcp_seq_num == tcp->fin_tx_seq)) ? TCP_FIN : 0;
+}
+
+static void tcp_steam_tx_try(struct tcp_stream *tcp)
+{
+ uchar *ptr;
+ u32 tx_offs, tx_len, tcp_opts_size;
+
+ if (tcp->state != TCP_ESTABLISHED ||
+ tcp->time_handler ||
+ !tcp->tx)
+ return;
+
+ tcp_opts_size = ROUND_TCPHDR_BYTES(TCP_TSOPT_SIZE + tcp->lost.len);
+ tx_len = TCP_MSS - tcp_opts_size;
+ if (tcp->fin_tx) {
+ /* do not try to send beyonds FIN packet limits */
+ if (tcp_seq_cmp(tcp->snd_una, tcp->fin_tx_seq) >= 0)
+ return;
+
+ tx_len = tcp->fin_tx_seq - tcp->snd_una;
+ if (tx_len > TCP_MSS - tcp_opts_size)
+ tx_len = TCP_MSS - tcp_opts_size;
+ }
+
+ tx_offs = tcp_stream_tx_offs(tcp);
+ ptr = net_tx_packet + net_eth_hdr_size() +
+ IP_TCP_HDR_SIZE + tcp_opts_size;
+
+ /* fill packet data and adjust size */
+ tx_len = tcp->tx(tcp, tx_offs, ptr, tx_len);
+ if (!tx_len)
+ return;
+
+ if (tcp_seq_cmp(tcp->snd_una + tx_len, tcp->snd_nxt) > 0)
+ tcp->snd_nxt = tcp->snd_una + tx_len;
+
+ tcp_send_packet_with_retry(tcp, TCP_ACK | TCP_PUSH,
+ tcp->snd_una, tx_len, tx_offs);
+}
+
+static void tcp_stream_poll(struct tcp_stream *tcp, ulong time)
+{
+ ulong delta;
+ void (*handler)(struct tcp_stream *tcp);
+
+ if (tcp->state == TCP_CLOSED)
+ return;
+
+ /* handle rx inactivity timeout */
+ delta = msec_to_ticks(tcp->rx_inactiv_timeout);
+ if (time - tcp->time_last_rx >= delta) {
+ puts("\nTCP: rx inactivity timeout exceeded\n");
+ tcp_stream_reset(tcp);
+ tcp_stream_set_status(tcp, TCP_ERR_TOUT);
+ tcp_stream_destroy(tcp);
+ return;
+ }
+
+ /* handle retransmit timeout */
+ if (tcp->time_handler &&
+ time - tcp->time_start >= tcp->time_delta) {
+ handler = tcp->time_handler;
+ tcp->time_handler = NULL;
+ handler(tcp);
+ }
+
+ tcp_steam_tx_try(tcp);
+}
+
+void tcp_streams_poll(void)
+{
+ ulong time;
+ struct tcp_stream *tcp;
+
+ time = get_timer(0);
+ tcp = &tcp_stream;
+ tcp_stream_poll(tcp, time);
}
/**
@@ -240,7 +505,6 @@ int net_set_ack_options(struct tcp_stream *tcp, union tcp_build_pkt *b)
* This returns the actual rounded up length of the
* TCP header to add to the total packet length
*/
-
return GET_TCP_HDR_LEN_IN_BYTES(b->sack.hdr.tcp_hlen);
}
@@ -300,18 +564,8 @@ int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int payload_len,
"TCP Hdr:SYN (%pI4, %pI4, sq=%u, ak=%u)\n",
&tcp->rhost, &net_ip,
tcp_seq_num, tcp_ack_num);
- tcp_activity_count = 0;
net_set_syn_options(tcp, b);
- tcp_seq_num = 0;
- tcp_ack_num = 0;
pkt_hdr_len = IP_TCP_O_SIZE;
- if (tcp->state == TCP_SYN_SENT) { /* Too many SYNs */
- action = TCP_FIN;
- tcp->state = TCP_FIN_WAIT_1;
- } else {
- tcp->lost.len = TCP_OPT_LEN_2;
- tcp->state = TCP_SYN_SENT;
- }
break;
case TCP_SYN | TCP_ACK:
case TCP_ACK:
@@ -328,21 +582,16 @@ int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int payload_len,
&tcp->rhost, &net_ip, tcp_seq_num, tcp_ack_num);
payload_len = 0;
pkt_hdr_len = IP_TCP_HDR_SIZE;
- tcp->state = TCP_FIN_WAIT_1;
break;
case TCP_RST | TCP_ACK:
case TCP_RST:
debug_cond(DEBUG_DEV_PKT,
"TCP Hdr:RST (%pI4, %pI4, s=%u, a=%u)\n",
&tcp->rhost, &net_ip, tcp_seq_num, tcp_ack_num);
- tcp->state = TCP_CLOSED;
break;
/* Notify connection closing */
case (TCP_FIN | TCP_ACK):
case (TCP_FIN | TCP_ACK | TCP_PUSH):
- if (tcp->state == TCP_CLOSE_WAIT)
- tcp->state = TCP_CLOSING;
-
debug_cond(DEBUG_DEV_PKT,
"TCP Hdr:FIN ACK PSH(%pI4, %pI4, s=%u, a=%u, A=%x)\n",
&tcp->rhost, &net_ip,
@@ -382,7 +631,7 @@ int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int payload_len,
* it is, then the u-boot tftp or nfs kernel netboot should be
* considered.
*/
- b->ip.hdr.tcp_win = htons(PKTBUFSRX * TCP_MSS >> TCP_SCALE);
+ b->ip.hdr.tcp_win = htons(tcp->rcv_wnd >> TCP_SCALE);
b->ip.hdr.tcp_xsum = 0;
b->ip.hdr.tcp_ugr = 0;
@@ -501,6 +750,7 @@ void tcp_hole(struct tcp_stream *tcp, u32 tcp_seq_num, u32 len)
void tcp_parse_options(struct tcp_stream *tcp, uchar *o, int o_len)
{
struct tcp_t_opt *tsopt;
+ struct tcp_scale *wsopt;
uchar *p = o;
/*
@@ -515,10 +765,13 @@ void tcp_parse_options(struct tcp_stream *tcp, uchar *o, int o_len)
case TCP_O_END:
return;
case TCP_O_MSS:
- case TCP_O_SCL:
case TCP_P_SACK:
case TCP_V_SACK:
break;
+ case TCP_O_SCL:
+ wsopt = (struct tcp_scale *)p;
+ tcp->rmt_win_scale = wsopt->scale;
+ break;
case TCP_O_TS:
tsopt = (struct tcp_t_opt *)p;
tcp->rmt_timestamp = tsopt->t_snd;
@@ -533,129 +786,333 @@ void tcp_parse_options(struct tcp_stream *tcp, uchar *o, int o_len)
}
}
-static u8 tcp_state_machine(struct tcp_stream *tcp, u8 tcp_flags,
- u32 tcp_seq_num, int payload_len)
+static int tcp_seg_in_wnd(struct tcp_stream *tcp,
+ u32 tcp_seq_num, int payload_len)
+{
+ if (!payload_len && !tcp->rcv_wnd) {
+ if (tcp_seq_num == tcp->rcv_nxt)
+ return 1;
+ }
+ if (!payload_len && tcp->rcv_wnd > 0) {
+ if (tcp_seq_cmp(tcp->rcv_nxt, tcp_seq_num) <= 0 &&
+ tcp_seq_cmp(tcp_seq_num, tcp->rcv_nxt + tcp->rcv_wnd) < 0)
+ return 1;
+ }
+ if (payload_len > 0 && tcp->rcv_wnd > 0) {
+ if (tcp_seq_cmp(tcp->rcv_nxt, tcp_seq_num) <= 0 &&
+ tcp_seq_cmp(tcp_seq_num, tcp->rcv_nxt + tcp->rcv_wnd) < 0)
+ return 1;
+ tcp_seq_num += payload_len - 1;
+ if (tcp_seq_cmp(tcp->rcv_nxt, tcp_seq_num) <= 0 &&
+ tcp_seq_cmp(tcp_seq_num, tcp->rcv_nxt + tcp->rcv_wnd) < 0)
+ return 1;
+ }
+
+ return 0;
+}
+
+static int tcp_rx_check_ack_num(struct tcp_stream *tcp, u32 tcp_seq_num,
+ u32 tcp_ack_num, u32 tcp_win_size)
{
- u8 tcp_fin = tcp_flags & TCP_FIN;
- u8 tcp_syn = tcp_flags & TCP_SYN;
- u8 tcp_rst = tcp_flags & TCP_RST;
- u8 tcp_push = tcp_flags & TCP_PUSH;
- u8 tcp_ack = tcp_flags & TCP_ACK;
- u8 action = TCP_DATA;
+ u32 old_offs, new_offs;
+ u8 action;
+ switch (tcp->state) {
+ case TCP_SYN_RECEIVED:
+ if (tcp_seq_cmp(tcp->snd_una, tcp_ack_num) >= 0 ||
+ tcp_seq_cmp(tcp_ack_num, tcp->snd_nxt) > 0) {
+ // segment acknowledgment is not acceptable
+ tcp_send_packet(tcp, TCP_RST, tcp_ack_num, 0, 0);
+ return TCP_PACKET_DROP;
+ }
+
+ tcp_stream_set_state(tcp, TCP_ESTABLISHED);
+ tcp->snd_wnd = tcp_win_size;
+ tcp->snd_wl1 = tcp_seq_num;
+ tcp->snd_wl2 = tcp_ack_num;
+
+ if (tcp->on_established)
+ tcp->on_established(tcp);
+
+ fallthrough;
+
+ case TCP_ESTABLISHED:
+ case TCP_FIN_WAIT_1:
+ case TCP_FIN_WAIT_2:
+ case TCP_CLOSE_WAIT:
+ case TCP_CLOSING:
+ if (tcp_seq_cmp(tcp_ack_num, tcp->snd_nxt) > 0) {
+ // ACK acks something not yet sent
+ action = tcp_stream_fin_needed(tcp, tcp->snd_una) | TCP_ACK;
+ tcp_send_packet(tcp, action, tcp->snd_una, tcp->rcv_nxt, 0);
+ return TCP_PACKET_DROP;
+ }
+
+ if (tcp_seq_cmp(tcp->snd_una, tcp_ack_num) < 0) {
+ old_offs = tcp_stream_tx_offs(tcp);
+ tcp->snd_una = tcp_ack_num;
+ new_offs = tcp_stream_tx_offs(tcp);
+ if (tcp->time_handler &&
+ tcp_seq_cmp(tcp->snd_una, tcp->retry_seq_num) > 0) {
+ tcp_stream_set_time_handler(tcp, 0, NULL);
+ }
+ if (tcp->on_snd_una_update &&
+ old_offs != new_offs)
+ tcp->on_snd_una_update(tcp, new_offs);
+ }
+
+ if (tcp_seq_cmp(tcp->snd_una, tcp_ack_num) <= 0) {
+ if (tcp_seq_cmp(tcp->snd_wl1, tcp_seq_num) < 0 ||
+ (tcp->snd_wl1 == tcp_seq_num &&
+ tcp_seq_cmp(tcp->snd_wl2, tcp_seq_num) <= 0)) {
+ tcp->snd_wnd = tcp_win_size;
+ tcp->snd_wl1 = tcp_seq_num;
+ tcp->snd_wl2 = tcp_ack_num;
+ }
+ }
+
+ if (tcp->state == TCP_FIN_WAIT_1) {
+ if (tcp->snd_una == tcp->snd_nxt)
+ tcp_stream_set_state(tcp, TCP_FIN_WAIT_2);
+ }
+
+ if (tcp->state == TCP_CLOSING) {
+ if (tcp->snd_una == tcp->snd_nxt)
+ tcp_stream_set_state(tcp, TCP_CLOSED);
+ }
+ return TCP_PACKET_OK;
+
+ case TCP_LAST_ACK:
+ if (tcp_ack_num == tcp->snd_nxt)
+ tcp_stream_set_state(tcp, TCP_CLOSED);
+ return TCP_PACKET_OK;
+
+ default:
+ return TCP_PACKET_DROP;
+ }
+}
+
+static int tcp_rx_user_data(struct tcp_stream *tcp, u32 tcp_seq_num,
+ char *buf, int len)
+{
+ u32 tmp_len, buf_offs, old_offs, new_offs;
+ u8 action;
+
+ if (!len)
+ return TCP_PACKET_OK;
+
+ switch (tcp->state) {
+ case TCP_ESTABLISHED:
+ case TCP_FIN_WAIT_1:
+ case TCP_FIN_WAIT_2:
+ break;
+ default:
+ return TCP_PACKET_DROP;
+ }
+
+ tmp_len = len;
+ old_offs = tcp_stream_rx_offs(tcp);
+ buf_offs = tcp_seq_num - tcp->irs - 1;
+ if (tcp->rx)
+ tmp_len = tcp->rx(tcp, buf_offs, buf, len);
+ if (tmp_len)
+ tcp_hole(tcp, tcp_seq_num, tmp_len);
+
+ new_offs = tcp_stream_rx_offs(tcp);
+ if (tcp->on_rcv_nxt_update && old_offs != new_offs)
+ tcp->on_rcv_nxt_update(tcp, new_offs);
+
+ action = tcp_stream_fin_needed(tcp, tcp->snd_una) | TCP_ACK;
+ tcp_send_packet(tcp, action, tcp->snd_una, tcp->rcv_nxt, 0);
+
+ return TCP_PACKET_OK;
+}
+
+void tcp_rx_state_machine(struct tcp_stream *tcp,
+ union tcp_build_pkt *b, unsigned int pkt_len)
+{
+ int tcp_len = pkt_len - IP_HDR_SIZE;
+ u32 tcp_seq_num, tcp_ack_num, tcp_win_size;
+ int tcp_hdr_len, payload_len;
+ u8 tcp_flags, action;
+
+ tcp_hdr_len = GET_TCP_HDR_LEN_IN_BYTES(b->ip.hdr.tcp_hlen);
+ payload_len = tcp_len - tcp_hdr_len;
+
+ if (tcp_hdr_len > TCP_HDR_SIZE)
+ tcp_parse_options(tcp, (uchar *)b + IP_TCP_HDR_SIZE,
+ tcp_hdr_len - TCP_HDR_SIZE);
/*
- * tcp_flags are examined to determine TX action in a given state
- * tcp_push is interpreted to mean "inform the app"
- * urg, ece, cer and nonce flags are not supported.
- *
- * exe and crw are use to signal and confirm knowledge of congestion.
- * This TCP only sends a file request and acks. If it generates
- * congestion, the network is broken.
+ * Incoming sequence and ack numbers are server's view of the numbers.
+ * The app must swap the numbers when responding.
*/
- debug_cond(DEBUG_INT_STATE, "TCP STATE ENTRY %x\n", action);
- if (tcp_rst) {
- action = TCP_DATA;
- tcp->state = TCP_CLOSED;
- net_set_state(NETLOOP_FAIL);
- debug_cond(DEBUG_INT_STATE, "TCP Reset %x\n", tcp_flags);
- return TCP_RST;
- }
+ tcp_seq_num = ntohl(b->ip.hdr.tcp_seq);
+ tcp_ack_num = ntohl(b->ip.hdr.tcp_ack);
+ tcp_win_size = ntohs(b->ip.hdr.tcp_win) << tcp->rmt_win_scale;
- switch (tcp->state) {
+ tcp_flags = b->ip.hdr.tcp_flags;
+
+// printf("pkt: seq=%d, ack=%d, flags=%x, len=%d\n",
+// tcp_seq_num - tcp->irs, tcp_ack_num - tcp->iss, tcp_flags, pkt_len);
+// printf("tcp: rcv_nxt=%d, snd_una=%d, snd_nxt=%d\n\n",
+// tcp->rcv_nxt - tcp->irs, tcp->snd_una - tcp->iss, tcp->snd_nxt - tcp->iss);
+
+ switch (tcp->state) {
case TCP_CLOSED:
- debug_cond(DEBUG_INT_STATE, "TCP CLOSED %x\n", tcp_flags);
- if (tcp_syn) {
- action = TCP_SYN | TCP_ACK;
- tcp->irs = tcp_seq_num;
- tcp->rcv_nxt = tcp_seq_num + 1;
- tcp->lost.len = TCP_OPT_LEN_2;
- tcp->state = TCP_SYN_RECEIVED;
- } else if (tcp_ack || tcp_fin) {
- action = TCP_DATA;
+ if (tcp_flags & TCP_RST)
+ return;
+
+ if (tcp_flags & TCP_ACK) {
+ tcp_send_packet(tcp, TCP_RST, tcp_ack_num, 0, 0);
+ return;
}
- break;
- case TCP_SYN_RECEIVED:
+
+ if (!(tcp_flags & TCP_SYN))
+ return;
+
+ tcp->irs = tcp_seq_num;
+ tcp->rcv_nxt = tcp->irs + 1;
+
+ tcp->iss = tcp_get_start_seq();
+ tcp->snd_una = tcp->iss;
+ tcp->snd_nxt = tcp->iss + 1;
+ tcp->snd_wnd = tcp_win_size;
+
+ tcp_stream_restart_rx_timer(tcp);
+
+ tcp_stream_set_state(tcp, TCP_SYN_RECEIVED);
+ tcp_send_packet_with_retry(tcp, TCP_SYN | TCP_ACK,
+ tcp->iss, 0, 0);
+ return;
+
case TCP_SYN_SENT:
- debug_cond(DEBUG_INT_STATE, "TCP_SYN_SENT | TCP_SYN_RECEIVED %x, %u\n",
- tcp_flags, tcp_seq_num);
- if (tcp_fin) {
- action = action | TCP_PUSH;
- tcp->state = TCP_CLOSE_WAIT;
- } else if (tcp_ack || (tcp_syn && tcp_ack)) {
- action |= TCP_ACK;
- tcp->irs = tcp_seq_num;
- tcp->rcv_nxt = tcp_seq_num + 1;
- tcp->state = TCP_ESTABLISHED;
-
- if (tcp_syn && tcp_ack)
- action |= TCP_PUSH;
- } else {
- action = TCP_DATA;
+ if (!(tcp_flags & TCP_ACK))
+ return;
+
+ if (tcp_seq_cmp(tcp_ack_num, tcp->iss) <= 0 ||
+ tcp_seq_cmp(tcp_ack_num, tcp->snd_nxt) > 0) {
+ if (!(tcp_flags & TCP_RST))
+ tcp_send_packet(tcp, TCP_RST, tcp_ack_num, 0, 0);
+ return;
}
- break;
+
+ if (tcp_flags & TCP_RST) {
+ tcp_stream_set_status(tcp, TCP_ERR_RST);
+ tcp_stream_set_state(tcp, TCP_CLOSED);
+ return;
+ }
+
+ if (!(tcp_flags & TCP_SYN))
+ return;
+
+ /* stop retransmit of SYN */
+ tcp_stream_set_time_handler(tcp, 0, NULL);
+
+ tcp->irs = tcp_seq_num;
+ tcp->rcv_nxt = tcp->irs + 1;
+ tcp->snd_una = tcp_ack_num;
+
+ tcp_stream_restart_rx_timer(tcp);
+
+ /* our SYN has been ACKed */
+ tcp_stream_set_state(tcp, TCP_ESTABLISHED);
+
+ if (tcp->on_established)
+ tcp->on_established(tcp);
+
+ action = tcp_stream_fin_needed(tcp, tcp->snd_una) | TCP_ACK;
+ tcp_send_packet(tcp, action, tcp->snd_una, tcp->rcv_nxt, 0);
+ tcp_rx_user_data(tcp, tcp_seq_num,
+ ((char *)b) + pkt_len - payload_len,
+ payload_len);
+ return;
+
+ case TCP_SYN_RECEIVED:
case TCP_ESTABLISHED:
- debug_cond(DEBUG_INT_STATE, "TCP_ESTABLISHED %x\n", tcp_flags);
- if (payload_len > 0) {
- tcp_hole(tcp, tcp_seq_num, payload_len);
- tcp_fin = TCP_DATA; /* cause standalone FIN */
+ case TCP_FIN_WAIT_1:
+ case TCP_FIN_WAIT_2:
+ case TCP_CLOSE_WAIT:
+ case TCP_CLOSING:
+ case TCP_LAST_ACK:
+ if (!tcp_seg_in_wnd(tcp, tcp_seq_num, payload_len)) {
+ if (tcp_flags & TCP_RST)
+ return;
+ action = tcp_stream_fin_needed(tcp, tcp->snd_una) | TCP_ACK;
+ tcp_send_packet(tcp, action, tcp->snd_una, tcp->rcv_nxt, 0);
+ return;
}
- if ((tcp_fin) &&
- (!IS_ENABLED(CONFIG_PROT_TCP_SACK) ||
- tcp->lost.len <= TCP_OPT_LEN_2)) {
- action = action | TCP_FIN | TCP_PUSH | TCP_ACK;
- tcp->state = TCP_CLOSE_WAIT;
- } else if (tcp_ack) {
- action = TCP_DATA;
+ tcp_stream_restart_rx_timer(tcp);
+
+ if (tcp_flags & TCP_RST) {
+ tcp_stream_set_status(tcp, TCP_ERR_RST);
+ tcp_stream_set_state(tcp, TCP_CLOSED);
+ return;
}
- if (tcp_syn)
- action = TCP_ACK + TCP_RST;
- else if (tcp_push)
- action = action | TCP_PUSH;
- break;
- case TCP_CLOSE_WAIT:
- debug_cond(DEBUG_INT_STATE, "TCP_CLOSE_WAIT (%x)\n", tcp_flags);
- action = TCP_DATA;
- break;
- case TCP_FIN_WAIT_2:
- debug_cond(DEBUG_INT_STATE, "TCP_FIN_WAIT_2 (%x)\n", tcp_flags);
- if (tcp_ack) {
- action = TCP_PUSH | TCP_ACK;
- tcp->state = TCP_CLOSED;
- puts("\n");
- } else if (tcp_syn) {
- action = TCP_DATA;
- } else if (tcp_fin) {
- action = TCP_DATA;
+ if (tcp_flags & TCP_SYN) {
+ tcp_send_packet(tcp, TCP_RST, tcp_ack_num, 0, 0);
+ tcp_stream_set_status(tcp, TCP_ERR_RST);
+ tcp_stream_set_state(tcp, TCP_CLOSED);
+ return;
}
- break;
- case TCP_FIN_WAIT_1:
- debug_cond(DEBUG_INT_STATE, "TCP_FIN_WAIT_1 (%x)\n", tcp_flags);
- if (tcp_fin) {
- tcp->rcv_nxt++;
- action = TCP_ACK | TCP_FIN;
- tcp->state = TCP_FIN_WAIT_2;
+
+ if (!(tcp_flags & TCP_ACK))
+ return;
+
+ if (tcp_rx_check_ack_num(tcp, tcp_seq_num, tcp_ack_num,
+ tcp_win_size) == TCP_PACKET_DROP) {
+ return;
}
- if (tcp_syn)
- action = TCP_RST;
- if (tcp_ack)
- tcp->state = TCP_CLOSED;
- break;
- case TCP_CLOSING:
- debug_cond(DEBUG_INT_STATE, "TCP_CLOSING (%x)\n", tcp_flags);
- if (tcp_ack) {
- action = TCP_PUSH;
- tcp->state = TCP_CLOSED;
- puts("\n");
- } else if (tcp_syn) {
- action = TCP_RST;
- } else if (tcp_fin) {
- action = TCP_DATA;
+
+ if (tcp_rx_user_data(tcp, tcp_seq_num,
+ ((char *)b) + pkt_len - payload_len,
+ payload_len) == TCP_PACKET_DROP) {
+ return;
+ }
+
+ if (tcp_flags & TCP_FIN) {
+ tcp->fin_rx = 1;
+ tcp->fin_rx_seq = tcp_seq_num + payload_len + 1;
+ tcp_hole(tcp, tcp_seq_num + payload_len, 1);
+ action = tcp_stream_fin_needed(tcp, tcp->snd_una) | TCP_ACK;
+ tcp_send_packet(tcp, action, tcp->snd_una, tcp->rcv_nxt, 0);
+ }
+
+ if (tcp->fin_rx &&
+ tcp->fin_rx_seq == tcp->rcv_nxt) {
+ /* all rx data were processed */
+ switch (tcp->state) {
+ case TCP_ESTABLISHED:
+ tcp_stream_set_state(tcp, TCP_LAST_ACK);
+ tcp_send_packet_with_retry(tcp, TCP_ACK | TCP_FIN,
+ tcp->snd_nxt, 0, 0);
+ tcp->snd_nxt++;
+ break;
+
+ case TCP_FIN_WAIT_1:
+ if (tcp_ack_num == tcp->snd_nxt)
+ tcp_stream_set_state(tcp, TCP_CLOSED);
+ else
+ tcp_stream_set_state(tcp, TCP_CLOSING);
+ break;
+
+ case TCP_FIN_WAIT_2:
+ tcp_stream_set_state(tcp, TCP_CLOSED);
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ if (tcp->state == TCP_FIN_WAIT_1 &&
+ tcp_stream_fin_needed(tcp, tcp->snd_una)) {
+ /* all tx data were acknowledged */
+ tcp_send_packet_with_retry(tcp, TCP_ACK | TCP_FIN,
+ tcp->snd_una, 0, 0);
}
- break;
}
- return action;
}
/**
@@ -667,9 +1124,6 @@ void rxhand_tcp_f(union tcp_build_pkt *b, unsigned int pkt_len)
{
int tcp_len = pkt_len - IP_HDR_SIZE;
u16 tcp_rx_xsum = b->ip.hdr.ip_sum;
- u8 tcp_action = TCP_DATA;
- u32 tcp_seq_num, tcp_ack_num;
- int tcp_hdr_len, payload_len;
struct tcp_stream *tcp;
struct in_addr src;
@@ -713,54 +1167,58 @@ void rxhand_tcp_f(union tcp_build_pkt *b, unsigned int pkt_len)
if (!tcp)
return;
- tcp_hdr_len = GET_TCP_HDR_LEN_IN_BYTES(b->ip.hdr.tcp_hlen);
- payload_len = tcp_len - tcp_hdr_len;
+ tcp_rx_state_machine(tcp, b, pkt_len);
+ tcp_stream_put(tcp);
+}
- if (tcp_hdr_len > TCP_HDR_SIZE)
- tcp_parse_options(tcp, (uchar *)b + IP_TCP_HDR_SIZE,
- tcp_hdr_len - TCP_HDR_SIZE);
- /*
- * Incoming sequence and ack numbers are server's view of the numbers.
- * The app must swap the numbers when responding.
- */
- tcp_seq_num = ntohl(b->ip.hdr.tcp_seq);
- tcp_ack_num = ntohl(b->ip.hdr.tcp_ack);
+struct tcp_stream *tcp_stream_connect(struct in_addr rhost, u16 rport)
+{
+ struct tcp_stream *tcp;
- /* Packets are not ordered. Send to app as received. */
- tcp_action = tcp_state_machine(tcp, b->ip.hdr.tcp_flags,
- tcp_seq_num, payload_len);
+ tcp = tcp_stream_add(rhost, rport, random_port());
+ if (!tcp)
+ return NULL;
- tcp_activity_count++;
- if (tcp_activity_count > TCP_ACTIVITY) {
- puts("| ");
- tcp_activity_count = 0;
- }
+ tcp->iss = tcp_get_start_seq();
+ tcp->snd_una = tcp->iss;
+ tcp->snd_nxt = tcp->iss + 1;
- if ((tcp_action & TCP_PUSH) || payload_len > 0) {
- debug_cond(DEBUG_DEV_PKT,
- "TCP Notify (action=%x, Seq=%u,Ack=%u,Pay%d)\n",
- tcp_action, tcp_seq_num, tcp_ack_num, payload_len);
+ tcp_stream_set_state(tcp, TCP_SYN_SENT);
+ tcp_send_packet_with_retry(tcp, TCP_SYN, tcp->snd_una, 0, 0);
- (*tcp_packet_handler) (tcp, (uchar *)b + pkt_len - payload_len,
- tcp_seq_num, tcp_ack_num, tcp_action,
- payload_len);
+ return tcp;
+}
- } else if (tcp_action != TCP_DATA) {
- debug_cond(DEBUG_DEV_PKT,
- "TCP Action (action=%x,Seq=%u,Ack=%u,Pay=%d)\n",
- tcp_action, tcp_ack_num, tcp->rcv_nxt, payload_len);
-
- /*
- * Warning: Incoming Ack & Seq sequence numbers are transposed
- * here to outgoing Seq & Ack sequence numbers
- */
- net_send_tcp_packet(0, tcp->rhost, tcp->rport, tcp->lport,
- (tcp_action & (~TCP_PUSH)),
- tcp_ack_num, tcp->rcv_nxt);
- }
+void tcp_stream_reset(struct tcp_stream *tcp)
+{
+ if (tcp->state == TCP_CLOSED)
+ return;
+
+ tcp_stream_set_time_handler(tcp, 0, NULL);
+ tcp_send_packet(tcp, TCP_RST, tcp->snd_una, 0, 0);
+ tcp_stream_set_status(tcp, TCP_ERR_RST);
+ tcp_stream_set_state(tcp, TCP_CLOSED);
}
-struct tcp_stream *tcp_stream_connect(struct in_addr rhost, u16 rport)
+void tcp_stream_close(struct tcp_stream *tcp)
{
- return tcp_stream_add(rhost, rport, random_port());
+ switch (tcp->state) {
+ case TCP_SYN_SENT:
+ tcp_stream_reset(tcp);
+ break;
+ case TCP_SYN_RECEIVED:
+ case TCP_ESTABLISHED:
+ tcp->fin_tx = 1;
+ tcp->fin_tx_seq = tcp->snd_nxt;
+ if (tcp_stream_fin_needed(tcp, tcp->snd_una)) {
+ /* all tx data were acknowledged */
+ tcp_send_packet_with_retry(tcp, TCP_ACK | TCP_FIN,
+ tcp->snd_una, 0, 0);
+ }
+ tcp_stream_set_state(tcp, TCP_FIN_WAIT_1);
+ tcp->snd_nxt++;
+ break;
+ default:
+ break;
+ }
}
diff --git a/net/wget.c b/net/wget.c
index ad5db21e97e..74df1378e5d 100644
--- a/net/wget.c
+++ b/net/wget.c
@@ -21,48 +21,26 @@ DECLARE_GLOBAL_DATA_PTR;
/* The default, change with environment variable 'httpdstp' */
#define SERVER_PORT 80
+#define HASHES_PER_LINE 65
+
+#define HTTP_MAX_HDR_LEN 2048
+
static const char bootfile1[] = "GET ";
static const char bootfile3[] = " HTTP/1.0\r\n\r\n";
static const char http_eom[] = "\r\n\r\n";
-static const char http_ok[] = "200";
-static const char content_len[] = "Content-Length";
+static const char http_ok[] = " 200 ";
+static const char content_len[] = "Content-Length:";
static const char linefeed[] = "\r\n";
-static int wget_timeout_count;
-struct tcp_stream *tcp;
-
-struct pkt_qd {
- uchar *pkt;
- unsigned int tcp_seq_num;
- unsigned int len;
-};
-
-/*
- * This is a control structure for out of order packets received.
- * The actual packet bufers are in the kernel space, and are
- * expected to be overwritten by the downloaded image.
- */
-#define PKTQ_SZ (PKTBUFSRX / 4)
-static struct pkt_qd pkt_q[PKTQ_SZ];
-static int pkt_q_idx;
+static struct in_addr web_server_ip;
+static unsigned int server_port;
static unsigned long content_length;
static unsigned int packets;
-
-static unsigned int initial_data_seq_num;
-static unsigned int next_data_seq_num;
-
-static enum wget_state current_wget_state;
+static u32 http_hdr_size;
+static int wget_tsize_num_hash;
static char *image_url;
-static unsigned int wget_timeout = WGET_TIMEOUT;
-
static enum net_loop_state wget_loop_state;
-/* Timeout retry parameters */
-static u8 retry_action; /* actions for TCP retry */
-static unsigned int retry_tcp_ack_num; /* TCP retry acknowledge number*/
-static unsigned int retry_tcp_seq_num; /* TCP retry sequence number */
-static int retry_len; /* TCP retry length */
-
static ulong wget_load_size;
/**
@@ -95,7 +73,6 @@ static int wget_init_load_size(void)
static inline int store_block(uchar *src, unsigned int offset, unsigned int len)
{
ulong store_addr = image_load_addr + offset;
- ulong newsize = offset + len;
uchar *ptr;
if (IS_ENABLED(CONFIG_LMB)) {
@@ -116,329 +93,153 @@ static inline int store_block(uchar *src, unsigned int offset, unsigned int len)
memcpy(ptr, src, len);
unmap_sysmem(ptr);
- if (net_boot_file_size < (offset + len))
- net_boot_file_size = newsize;
-
return 0;
}
-/**
- * wget_send_stored() - wget response dispatcher
- *
- * WARNING, This, and only this, is the place in wget.c where
- * SEQUENCE NUMBERS are swapped between incoming (RX)
- * and outgoing (TX).
- * Procedure wget_handler() is correct for RX traffic.
- */
-static void wget_send_stored(void)
+static void show_block_marker(void)
{
- u8 action = retry_action;
- int len = retry_len;
- unsigned int tcp_ack_num = retry_tcp_seq_num + (len == 0 ? 1 : len);
- unsigned int tcp_seq_num = retry_tcp_ack_num;
- uchar *ptr, *offset;
-
- switch (current_wget_state) {
- case WGET_CLOSED:
- debug_cond(DEBUG_WGET, "wget: send SYN\n");
- current_wget_state = WGET_CONNECTING;
- net_send_tcp_packet(0, tcp->rhost, tcp->rport, tcp->lport, action,
- tcp_seq_num, tcp_ack_num);
- packets = 0;
- break;
- case WGET_CONNECTING:
- pkt_q_idx = 0;
- net_send_tcp_packet(0, tcp->rhost, tcp->rport, tcp->lport, action,
- tcp_seq_num, tcp_ack_num);
-
- ptr = net_tx_packet + net_eth_hdr_size() +
- IP_TCP_HDR_SIZE + TCP_TSOPT_SIZE + 2;
- offset = ptr;
-
- memcpy(offset, &bootfile1, strlen(bootfile1));
- offset += strlen(bootfile1);
-
- memcpy(offset, image_url, strlen(image_url));
- offset += strlen(image_url);
-
- memcpy(offset, &bootfile3, strlen(bootfile3));
- offset += strlen(bootfile3);
- net_send_tcp_packet((offset - ptr), tcp->rhost, tcp->rport, tcp->lport,
- TCP_PUSH, tcp_seq_num, tcp_ack_num);
- current_wget_state = WGET_CONNECTED;
- break;
- case WGET_CONNECTED:
- case WGET_TRANSFERRING:
- case WGET_TRANSFERRED:
- net_send_tcp_packet(0, tcp->rhost, tcp->rport, tcp->lport, action,
- tcp_seq_num, tcp_ack_num);
- break;
- }
-}
+ int cnt;
-static void wget_send(u8 action, unsigned int tcp_seq_num,
- unsigned int tcp_ack_num, int len)
-{
- retry_action = action;
- retry_tcp_ack_num = tcp_ack_num;
- retry_tcp_seq_num = tcp_seq_num;
- retry_len = len;
+ if (content_length != -1) {
+ if (net_boot_file_size > content_length)
+ content_length = net_boot_file_size;
- wget_send_stored();
+ cnt = net_boot_file_size * 50 / content_length;
+ while (wget_tsize_num_hash < cnt) {
+ putc('#');
+ wget_tsize_num_hash++;
+ }
+ } else {
+ if ((packets % 10) == 0)
+ putc('#');
+ else if (((packets + 1) % (10 * HASHES_PER_LINE)) == 0)
+ puts("\n");
+ }
}
-void wget_fail(char *error_message, unsigned int tcp_seq_num,
- unsigned int tcp_ack_num, u8 action)
+static void tcp_stream_on_closed(struct tcp_stream *tcp)
{
- printf("wget: Transfer Fail - %s\n", error_message);
- net_set_timeout_handler(0, NULL);
- wget_send(action, tcp_seq_num, tcp_ack_num, 0);
+ if (tcp->status != TCP_ERR_OK)
+ wget_loop_state = NETLOOP_FAIL;
+
+ if (wget_loop_state != NETLOOP_SUCCESS)
+ printf("\nwget: Transfer Fail, TCP status - %d\n", tcp->status);
+ else
+ printf("\nPackets received %d, Transfer Successful\n", packets);
+ net_set_state(wget_loop_state);
}
-void wget_success(u8 action, unsigned int tcp_seq_num,
- unsigned int tcp_ack_num, int len, int packets)
+static void tcp_stream_on_rcv_nxt_update(struct tcp_stream *tcp, u32 rx_bytes)
{
- printf("Packets received %d, Transfer Successful\n", packets);
- wget_send(action, tcp_seq_num, tcp_ack_num, len);
-}
+ char *pos, *tail;
+ uchar saved, *ptr;
+ int i;
-/*
- * Interfaces of U-BOOT
- */
-static void wget_timeout_handler(void)
-{
- if (++wget_timeout_count > WGET_RETRY_COUNT) {
- puts("\nRetry count exceeded; starting again\n");
- wget_send(TCP_RST, 0, 0, 0);
- net_start_again();
- } else {
- puts("T ");
- net_set_timeout_handler(wget_timeout +
- WGET_TIMEOUT * wget_timeout_count,
- wget_timeout_handler);
- wget_send_stored();
+ if (http_hdr_size) {
+ net_boot_file_size = rx_bytes - http_hdr_size;
+ show_block_marker();
+ return;
}
-}
-
-#define PKT_QUEUE_OFFSET 0x20000
-#define PKT_QUEUE_PACKET_SIZE 0x800
-static void wget_connected(uchar *pkt, unsigned int tcp_seq_num,
- u8 action, unsigned int tcp_ack_num, unsigned int len)
-{
- uchar *pkt_in_q;
- char *pos;
- int hlen, i;
- uchar *ptr1;
+ ptr = map_sysmem(image_load_addr, rx_bytes + 1);
- pkt[len] = '\0';
- pos = strstr((char *)pkt, http_eom);
+ saved = ptr[rx_bytes];
+ ptr[rx_bytes] = '\0';
+ pos = strstr((char *)ptr, http_eom);
+ ptr[rx_bytes] = saved;
if (!pos) {
- debug_cond(DEBUG_WGET,
- "wget: Connected, data before Header %p\n", pkt);
- pkt_in_q = (void *)image_load_addr + PKT_QUEUE_OFFSET +
- (pkt_q_idx * PKT_QUEUE_PACKET_SIZE);
-
- ptr1 = map_sysmem((phys_addr_t)pkt_in_q, len);
- memcpy(ptr1, pkt, len);
- unmap_sysmem(ptr1);
-
- pkt_q[pkt_q_idx].pkt = pkt_in_q;
- pkt_q[pkt_q_idx].tcp_seq_num = tcp_seq_num;
- pkt_q[pkt_q_idx].len = len;
- pkt_q_idx++;
-
- if (pkt_q_idx >= PKTQ_SZ) {
- printf("wget: Fatal error, queue overrun!\n");
- net_set_state(NETLOOP_FAIL);
+ if (rx_bytes < HTTP_MAX_HDR_LEN &&
+ tcp->state == TCP_ESTABLISHED)
+ goto end;
+
+ printf("ERROR: misssed HTTP header\n");
+ tcp_stream_close(tcp);
+ wget_loop_state = NETLOOP_FAIL;
+ goto end;
+ }
- return;
- }
- } else {
- debug_cond(DEBUG_WGET, "wget: Connected HTTP Header %p\n", pkt);
- /* sizeof(http_eom) - 1 is the string length of (http_eom) */
- hlen = pos - (char *)pkt + sizeof(http_eom) - 1;
- pos = strstr((char *)pkt, linefeed);
- if (pos > 0)
- i = pos - (char *)pkt;
- else
- i = hlen;
- printf("%.*s", i, pkt);
-
- current_wget_state = WGET_TRANSFERRING;
-
- initial_data_seq_num = tcp_seq_num + hlen;
- next_data_seq_num = tcp_seq_num + len;
-
- if (strstr((char *)pkt, http_ok) == 0) {
- debug_cond(DEBUG_WGET,
- "wget: Connected Bad Xfer\n");
- wget_loop_state = NETLOOP_FAIL;
- wget_send(action, tcp_seq_num, tcp_ack_num, len);
- } else {
- debug_cond(DEBUG_WGET,
- "wget: Connctd pkt %p hlen %x\n",
- pkt, hlen);
-
- pos = strstr((char *)pkt, content_len);
- if (!pos) {
- content_length = -1;
- } else {
- pos += sizeof(content_len) + 2;
- strict_strtoul(pos, 10, &content_length);
- debug_cond(DEBUG_WGET,
- "wget: Connected Len %lu\n",
- content_length);
- }
-
- net_boot_file_size = 0;
-
- if (len > hlen) {
- if (store_block(pkt + hlen, 0, len - hlen) != 0) {
- wget_loop_state = NETLOOP_FAIL;
- wget_fail("wget: store error\n", tcp_seq_num, tcp_ack_num, action);
- net_set_state(NETLOOP_FAIL);
- return;
- }
- }
+ http_hdr_size = pos - (char *)ptr + strlen(http_eom);
+ *pos = '\0';
+
+ pos = strstr((char *)ptr, linefeed);
+ if (pos > 0)
+ i = pos - (char *)ptr;
+ else
+ i = http_hdr_size - strlen(http_eom);
+ printf("%.*s\n", i, ptr);
+
+ if (!strstr((char *)ptr, http_ok)) {
+ debug_cond(DEBUG_WGET, "wget: Connected Bad Xfer\n");
+ tcp_stream_close(tcp);
+ wget_loop_state = NETLOOP_FAIL;
+ goto end;
+ }
- debug_cond(DEBUG_WGET,
- "wget: Connected Pkt %p hlen %x\n",
- pkt, hlen);
-
- for (i = 0; i < pkt_q_idx; i++) {
- int err;
-
- ptr1 = map_sysmem(
- (phys_addr_t)(pkt_q[i].pkt),
- pkt_q[i].len);
- err = store_block(ptr1,
- pkt_q[i].tcp_seq_num -
- initial_data_seq_num,
- pkt_q[i].len);
- unmap_sysmem(ptr1);
- debug_cond(DEBUG_WGET,
- "wget: Connctd pkt Q %p len %x\n",
- pkt_q[i].pkt, pkt_q[i].len);
- if (err) {
- wget_loop_state = NETLOOP_FAIL;
- wget_fail("wget: store error\n", tcp_seq_num, tcp_ack_num, action);
- net_set_state(NETLOOP_FAIL);
- return;
- }
- }
- }
+ debug_cond(DEBUG_WGET, "wget: Connctd pkt %p hlen %x\n",
+ ptr, http_hdr_size);
+
+ pos = strstr((char *)ptr, content_len);
+ if (!pos) {
+ content_length = -1;
+ } else {
+ pos += strlen(content_len) + 1;
+ content_length = simple_strtoul(pos, &tail, 10);
+ if (*tail != '\r' && *tail != '\n' && *tail != '\0')
+ content_length = -1;
+ printf("%s %d\n", content_len, (int)content_length);
}
- wget_send(action, tcp_seq_num, tcp_ack_num, len);
+
+ net_boot_file_size = rx_bytes - http_hdr_size;
+ memmove(ptr, ptr + http_hdr_size, net_boot_file_size);
+
+end:
+ unmap_sysmem(ptr);
+
+ wget_loop_state = NETLOOP_SUCCESS;
}
-/**
- * wget_handler() - TCP handler of wget
- * @tcp: TCP stream
- * @pkt: pointer to the application packet
- * @tcp_seq_num: TCP sequential number
- * @tcp_ack_num: TCP acknowledgment number
- * @action: TCP action (SYN, ACK, FIN, etc)
- * @len: packet length
- *
- * In the "application push" invocation, the TCP header with all
- * its information is pointed to by the packet pointer.
- */
-static void wget_handler(struct tcp_stream *tcp, uchar *pkt,
- u32 tcp_seq_num, u32 tcp_ack_num,
- u8 action, unsigned int len)
+static u32 tcp_stream_rx(struct tcp_stream *tcp, u32 rx_offs, void *buf, u32 len)
{
- enum tcp_state wget_tcp_state = tcp_stream_get_state(tcp);
-
- net_set_timeout_handler(wget_timeout, wget_timeout_handler);
packets++;
+ store_block(buf, rx_offs - http_hdr_size, len);
- switch (current_wget_state) {
- case WGET_CLOSED:
- debug_cond(DEBUG_WGET, "wget: Handler: Error!, State wrong\n");
- break;
- case WGET_CONNECTING:
- debug_cond(DEBUG_WGET,
- "wget: Connecting In len=%x, Seq=%u, Ack=%u\n",
- len, tcp_seq_num, tcp_ack_num);
- if (!len) {
- if (wget_tcp_state == TCP_ESTABLISHED) {
- debug_cond(DEBUG_WGET,
- "wget: Cting, send, len=%x\n", len);
- wget_send(action, tcp_seq_num, tcp_ack_num,
- len);
- } else {
- printf("%.*s", len, pkt);
- wget_fail("wget: Handler Connected Fail\n",
- tcp_seq_num, tcp_ack_num, action);
- }
- }
- break;
- case WGET_CONNECTED:
- debug_cond(DEBUG_WGET, "wget: Connected seq=%u, len=%x\n",
- tcp_seq_num, len);
- if (!len) {
- wget_fail("Image not found, no data returned\n",
- tcp_seq_num, tcp_ack_num, action);
- } else {
- wget_connected(pkt, tcp_seq_num, action, tcp_ack_num, len);
- }
- break;
- case WGET_TRANSFERRING:
- debug_cond(DEBUG_WGET,
- "wget: Transferring, seq=%x, ack=%x,len=%x\n",
- tcp_seq_num, tcp_ack_num, len);
-
- if (next_data_seq_num != tcp_seq_num) {
- debug_cond(DEBUG_WGET, "wget: seq=%x packet was lost\n", next_data_seq_num);
- return;
- }
- next_data_seq_num = tcp_seq_num + len;
+ return len;
+}
- if (store_block(pkt, tcp_seq_num - initial_data_seq_num, len) != 0) {
- wget_fail("wget: store error\n",
- tcp_seq_num, tcp_ack_num, action);
- net_set_state(NETLOOP_FAIL);
- return;
- }
+static u32 tcp_stream_tx(struct tcp_stream *tcp, u32 tx_offs, void *buf, u32 maxlen)
+{
+ int ret;
- switch (wget_tcp_state) {
- case TCP_FIN_WAIT_2:
- wget_send(TCP_ACK, tcp_seq_num, tcp_ack_num, len);
- fallthrough;
- case TCP_SYN_SENT:
- case TCP_SYN_RECEIVED:
- case TCP_CLOSING:
- case TCP_FIN_WAIT_1:
- case TCP_CLOSED:
- net_set_state(NETLOOP_FAIL);
- break;
- case TCP_ESTABLISHED:
- wget_send(TCP_ACK, tcp_seq_num, tcp_ack_num,
- len);
- wget_loop_state = NETLOOP_SUCCESS;
- break;
- case TCP_CLOSE_WAIT: /* End of transfer */
- current_wget_state = WGET_TRANSFERRED;
- wget_send(action | TCP_ACK | TCP_FIN,
- tcp_seq_num, tcp_ack_num, len);
- break;
- }
- break;
- case WGET_TRANSFERRED:
- printf("Packets received %d, Transfer Successful\n", packets);
- net_set_state(wget_loop_state);
- break;
- }
+ if (tx_offs)
+ return 0;
+
+ ret = snprintf(buf, maxlen, "%s%s%s", bootfile1, image_url, bootfile3);
+
+ return ret;
+}
+
+static int tcp_stream_on_create(struct tcp_stream *tcp)
+{
+ if (tcp->rhost.s_addr != web_server_ip.s_addr ||
+ tcp->rport != server_port)
+ return 0;
+
+ tcp->max_retry_count = WGET_RETRY_COUNT;
+ tcp->initial_timeout = WGET_TIMEOUT;
+ tcp->on_closed = tcp_stream_on_closed;
+ tcp->on_rcv_nxt_update = tcp_stream_on_rcv_nxt_update;
+ tcp->rx = tcp_stream_rx;
+ tcp->tx = tcp_stream_tx;
+
+ return 1;
}
#define BLOCKSIZE 512
void wget_start(void)
{
- struct in_addr web_server_ip;
- unsigned int server_port;
+ struct tcp_stream *tcp;
image_url = strchr(net_boot_file_name, ':');
if (image_url > 0) {
@@ -486,12 +287,6 @@ void wget_start(void)
}
}
- net_set_timeout_handler(wget_timeout, wget_timeout_handler);
- tcp_set_tcp_handler(wget_handler);
-
- wget_timeout_count = 0;
- current_wget_state = WGET_CLOSED;
-
/*
* Zero out server ether to force arp resolution in case
* the server ip for the previous u-boot command, for example dns
@@ -500,14 +295,21 @@ void wget_start(void)
memset(net_server_ethaddr, 0, 6);
+ packets = 0;
+ net_boot_file_size = 0;
+ http_hdr_size = 0;
+ wget_tsize_num_hash = 0;
+ wget_loop_state = NETLOOP_FAIL;
+
server_port = env_get_ulong("httpdstp", 10, SERVER_PORT) & 0xffff;
+ tcp_stream_set_on_create_handler(tcp_stream_on_create);
tcp = tcp_stream_connect(web_server_ip, server_port);
- if (tcp == NULL) {
+ if (!tcp) {
+ printf("No free tcp streams\n");
net_set_state(NETLOOP_FAIL);
return;
}
-
- wget_send(TCP_SYN, 0, 0, 0);
+ tcp_stream_put(tcp);
}
#if (IS_ENABLED(CONFIG_CMD_DNS))
--
2.45.2
More information about the U-Boot
mailing list