Current code assume that all (except last) packets are of the same size. This is definitely wrong. Replace SACK code with a new one, that does not rely on this assumption. Also this code uses less memory.

Signed-off-by: Mikhail Kshevetskiy mikhail.kshevetskiy@iopsys.eu Reviewed-by: Simon Glass sjg@chromium.org --- net/tcp.c | 200 +++++++++++++++++++++++------------------------------- 1 file changed, 86 insertions(+), 114 deletions(-)

diff --git a/net/tcp.c b/net/tcp.c index 3e3118de450..724536cb352 100644 --- a/net/tcp.c +++ b/net/tcp.c @@ -38,21 +38,6 @@ static u32 tcp_ack_edge;

static int tcp_activity_count;

-/* - * Search for TCP_SACK and review the comments before the code section - * TCP_SACK is the number of packets at the front of the stream - */ - -enum pkt_state {PKT, NOPKT}; -struct sack_r { - struct sack_edges se; - enum pkt_state st; -}; - -static struct sack_r edge_a[TCP_SACK]; -static unsigned int sack_idx; -static unsigned int prev_len; - /* * TCP lengths are stored as a rounded up number of 32 bit words. * Add 3 to length round up, rounded, then divided into the @@ -69,6 +54,11 @@ static enum tcp_state current_tcp_state; /* Current TCP RX packet handler */ static rxhand_tcp *tcp_packet_handler;

+static inline s32 tcp_seq_cmp(u32 a, u32 b) +{ + return (s32)(a - b); +} + /** * tcp_get_tcp_state() - get current TCP state * @@ -267,6 +257,7 @@ int tcp_set_tcp_header(uchar *pkt, int dport, int sport, int payload_len, action = TCP_FIN; current_tcp_state = TCP_FIN_WAIT_1; } else { + tcp_lost.len = TCP_OPT_LEN_2; current_tcp_state = TCP_SYN_SENT; } break; @@ -353,6 +344,20 @@ int tcp_set_tcp_header(uchar *pkt, int dport, int sport, int payload_len, return pkt_hdr_len; }

+static void tcp_update_ack_edge(void) +{ + if (tcp_seq_cmp(tcp_ack_edge, tcp_lost.hill[0].l) >= 0) { + tcp_ack_edge = tcp_lost.hill[0].r; + + memmove(&tcp_lost.hill[0], &tcp_lost.hill[1], + (TCP_SACK_HILLS - 1) * sizeof(struct sack_edges)); + + tcp_lost.len -= TCP_OPT_LEN_8; + tcp_lost.hill[TCP_SACK_HILLS - 1].l = TCP_O_NOP; + tcp_lost.hill[TCP_SACK_HILLS - 1].r = TCP_O_NOP; + } +} + /** * tcp_hole() - Selective Acknowledgment (Essential for fast stream transfer) * @tcp_seq_num: TCP sequence start number @@ -360,106 +365,79 @@ int tcp_set_tcp_header(uchar *pkt, int dport, int sport, int payload_len, */ void tcp_hole(u32 tcp_seq_num, u32 len) { - u32 idx_sack, sack_in; - u32 sack_end = TCP_SACK - 1; - u32 hill = 0; - enum pkt_state expect = PKT; - u32 seq = tcp_seq_num - tcp_seq_init; - u32 hol_l = tcp_ack_edge - tcp_seq_init; - u32 hol_r = 0; - - /* Place new seq number in correct place in receive array */ - if (prev_len == 0) - prev_len = len; - - idx_sack = sack_idx + ((tcp_seq_num - tcp_ack_edge) / prev_len); - if (idx_sack < TCP_SACK) { - edge_a[idx_sack].se.l = tcp_seq_num; - edge_a[idx_sack].se.r = tcp_seq_num + len; - edge_a[idx_sack].st = PKT; + int i, j, cnt, cnt_move;

- /* - * The fin (last) packet is not the same length as data - * packets, and if it's length is recorded and used for - * array index calculation, calculation breaks. - */ - if (prev_len < len) - prev_len = len; - } + cnt = (tcp_lost.len - TCP_OPT_LEN_2) / TCP_OPT_LEN_8; + for (i = 0; i < cnt; i++) { + if (tcp_seq_cmp(tcp_lost.hill[i].r, tcp_seq_num) < 0) + continue; + if (tcp_seq_cmp(tcp_lost.hill[i].l, tcp_seq_num + len) > 0) + break;

- debug_cond(DEBUG_DEV_PKT, - "TCP 1 seq %d, edg %d, len %d, sack_idx %d, sack_end %d\n", - seq, hol_l, len, sack_idx, sack_end); + if (tcp_seq_cmp(tcp_lost.hill[i].l, tcp_seq_num) > 0) + tcp_lost.hill[i].l = tcp_seq_num; + if (tcp_seq_cmp(tcp_lost.hill[i].l, tcp_seq_num) < 0) { + len += tcp_seq_num - tcp_lost.hill[i].l; + tcp_seq_num = tcp_lost.hill[i].l; + } + if (tcp_seq_cmp(tcp_lost.hill[i].r, tcp_seq_num + len) >= 0) { + tcp_update_ack_edge(); + return; + }

- /* Right edge of contiguous stream, is the left edge of first hill */ - hol_l = tcp_seq_num - tcp_seq_init; - hol_r = hol_l + len; + /* check overlapping with next hills */ + cnt_move = 0; + tcp_lost.hill[i].r = tcp_seq_num + len; + for (j = i + 1; j < cnt; j++) { + if (tcp_seq_cmp(tcp_lost.hill[j].l, tcp_lost.hill[i].r) > 0) + break;

- if (IS_ENABLED(CONFIG_PROT_TCP_SACK)) - tcp_lost.len = TCP_OPT_LEN_2; + tcp_lost.hill[i].r = tcp_lost.hill[j].r; + cnt_move++; + }

- debug_cond(DEBUG_DEV_PKT, - "TCP 1 in %d, seq %d, pkt_l %d, pkt_r %d, sack_idx %d, sack_end %d\n", - idx_sack, seq, hol_l, hol_r, sack_idx, sack_end); - - for (sack_in = sack_idx; sack_in < sack_end && hill < TCP_SACK_HILLS; - sack_in++) { - switch (expect) { - case NOPKT: - switch (edge_a[sack_in].st) { - case NOPKT: - debug_cond(DEBUG_INT_STATE, "N"); - break; - case PKT: - debug_cond(DEBUG_INT_STATE, "n"); - if (IS_ENABLED(CONFIG_PROT_TCP_SACK)) { - tcp_lost.hill[hill].l = - edge_a[sack_in].se.l; - tcp_lost.hill[hill].r = - edge_a[sack_in].se.r; - } - expect = PKT; - break; - } - break; - case PKT: - switch (edge_a[sack_in].st) { - case NOPKT: - debug_cond(DEBUG_INT_STATE, "p"); - if (sack_in > sack_idx && - hill < TCP_SACK_HILLS) { - hill++; - if (IS_ENABLED(CONFIG_PROT_TCP_SACK)) - tcp_lost.len += TCP_OPT_LEN_8; - } - expect = NOPKT; - break; - case PKT: - debug_cond(DEBUG_INT_STATE, "P"); - - if (tcp_ack_edge == edge_a[sack_in].se.l) { - tcp_ack_edge = edge_a[sack_in].se.r; - edge_a[sack_in].st = NOPKT; - sack_idx++; - } else { - if (IS_ENABLED(CONFIG_PROT_TCP_SACK) && - hill < TCP_SACK_HILLS) - tcp_lost.hill[hill].r = - edge_a[sack_in].se.r; - if (IS_ENABLED(CONFIG_PROT_TCP_SACK) && - sack_in == sack_end - 1) - tcp_lost.hill[hill].r = - edge_a[sack_in].se.r; - } - break; + if (cnt_move > 0) { + if (cnt > i + cnt_move + 1) + memmove(&tcp_lost.hill[i + 1], + &tcp_lost.hill[i + cnt_move + 1], + cnt_move * sizeof(struct sack_edges)); + + cnt -= cnt_move; + tcp_lost.len = TCP_OPT_LEN_2 + cnt * TCP_OPT_LEN_8; + for (j = cnt; j < TCP_SACK_HILLS; j++) { + tcp_lost.hill[j].l = TCP_O_NOP; + tcp_lost.hill[j].r = TCP_O_NOP; } - break; } + + tcp_update_ack_edge(); + return; } - debug_cond(DEBUG_INT_STATE, "\n"); - if (!IS_ENABLED(CONFIG_PROT_TCP_SACK) || tcp_lost.len <= TCP_OPT_LEN_2) - sack_idx = 0; -} + + if (i == TCP_SACK_HILLS) { + tcp_update_ack_edge(); + return; + } + + if (cnt < TCP_SACK_HILLS) { + cnt_move = cnt - i; + cnt++; + } else { + cnt = TCP_SACK_HILLS; + cnt_move = TCP_SACK_HILLS - i; + } + + if (cnt_move > 0) + memmove(&tcp_lost.hill[i + 1], + &tcp_lost.hill[i], + cnt_move * sizeof(struct sack_edges)); + + tcp_lost.hill[i].l = tcp_seq_num; + tcp_lost.hill[i].r = tcp_seq_num + len; + tcp_lost.len = TCP_OPT_LEN_2 + cnt * TCP_OPT_LEN_8; + + tcp_update_ack_edge(); +};

/** * tcp_parse_options() - parsing TCP options @@ -509,7 +487,6 @@ static u8 tcp_state_machine(u8 tcp_flags, u32 tcp_seq_num, int payload_len) u8 tcp_push = tcp_flags & TCP_PUSH; u8 tcp_ack = tcp_flags & TCP_ACK; u8 action = TCP_DATA; - int i;

/* * tcp_flags are examined to determine TX action in a given state @@ -536,6 +513,7 @@ static u8 tcp_state_machine(u8 tcp_flags, u32 tcp_seq_num, int payload_len) action = TCP_SYN | TCP_ACK; tcp_seq_init = tcp_seq_num; tcp_ack_edge = tcp_seq_num + 1; + tcp_lost.len = TCP_OPT_LEN_2; current_tcp_state = TCP_SYN_RECEIVED; } else if (tcp_ack || tcp_fin) { action = TCP_DATA; @@ -552,13 +530,7 @@ static u8 tcp_state_machine(u8 tcp_flags, u32 tcp_seq_num, int payload_len) action |= TCP_ACK; tcp_seq_init = tcp_seq_num; tcp_ack_edge = tcp_seq_num + 1; - sack_idx = 0; - edge_a[sack_idx].se.l = tcp_ack_edge; - edge_a[sack_idx].se.r = tcp_ack_edge; - prev_len = 0; current_tcp_state = TCP_ESTABLISHED; - for (i = 0; i < TCP_SACK; i++) - edge_a[i].st = NOPKT;

if (tcp_syn && tcp_ack) action |= TCP_PUSH;

Changes: * Avoid use net_server_ip in tcp code, use tcp_stream data instead * Ignore packets from other connections if connection already created. This prevents us from connection break caused by other tcp stream.

Signed-off-by: Mikhail Kshevetskiy mikhail.kshevetskiy@iopsys.eu Reviewed-by: Simon Glass sjg@chromium.org --- include/net-legacy.h | 5 +- include/net/tcp.h | 57 ++++++++++++++++--- net/fastboot_tcp.c | 50 +++++++++-------- net/net.c | 12 ++-- net/tcp.c | 129 +++++++++++++++++++++++++++++++++---------- net/wget.c | 52 ++++++----------- 6 files changed, 203 insertions(+), 102 deletions(-)

diff --git a/include/net-legacy.h b/include/net-legacy.h index 1f62ebff51d..bc0f0cde9fe 100644 --- a/include/net-legacy.h +++ b/include/net-legacy.h @@ -416,6 +416,7 @@ int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport, /** * net_send_tcp_packet() - Transmit TCP packet. * @payload_len: length of payload + * @dhost: Destination host * @dport: Destination TCP port * @sport: Source TCP port * @action: TCP action to be performed @@ -424,8 +425,8 @@ int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport, * * Return: 0 on success, other value on failure */ -int net_send_tcp_packet(int payload_len, int dport, int sport, u8 action, - u32 tcp_seq_num, u32 tcp_ack_num); +int net_send_tcp_packet(int payload_len, struct in_addr dhost, int dport, + int sport, u8 action, u32 tcp_seq_num, u32 tcp_ack_num); int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport, int payload_len);

diff --git a/include/net/tcp.h b/include/net/tcp.h index 14aee64cb1c..f224d0cae2f 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -279,6 +279,9 @@ enum tcp_state {

/** * struct tcp_stream - TCP data stream structure + * @rhost: Remote host, network byte order + * @rport: Remote port, host byte order + * @lport: Local port, host byte order * * @state: TCP connection state * @@ -291,6 +294,10 @@ enum tcp_state { * @lost: Used for SACK */ struct tcp_stream { + struct in_addr rhost; + u16 rport; + u16 lport; + /* TCP connection state */ enum tcp_state state;

@@ -305,16 +312,53 @@ struct tcp_stream { struct tcp_sack_v lost; };

-struct tcp_stream *tcp_stream_get(void); +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: + * + Check TCP stream endpoint and make connection verdict + * - return non-zero value to accept connection + * - return zero to drop connection + * + * WARNING: If callback is NOT defined, all incoming connections + * will be dropped. + */ +void tcp_set_incoming_filter(tcp_incoming_filter *filter); + +/* + * tcp_stream_get -- Get or create TCP stream + * @is_new: if non-zero and no stream found, then create a new one + * @rhost: Remote host, network byte order + * @rport: Remote port, host byte order + * @lport: Local port, host byte order + * + * Returns: TCP stream structure or NULL (if not found/created) + */ +struct tcp_stream *tcp_stream_get(int is_new, struct in_addr rhost, + u16 rport, u16 lport); + +/* + * tcp_stream_connect -- Create new TCP stream for remote connection. + * @rhost: Remote host, network byte order + * @rport: Remote port, host byte order + * + * Returns: TCP new stream structure or NULL (if not created). + * Random local port will be used. + */ +struct tcp_stream *tcp_stream_connect(struct in_addr rhost, u16 rport); + +enum tcp_state tcp_stream_get_state(struct tcp_stream *tcp);

-enum tcp_state tcp_get_tcp_state(struct tcp_stream *tcp); -void tcp_set_tcp_state(struct tcp_stream *tcp, enum tcp_state new_state); -int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int dport, - int sport, int payload_len, +int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int payload_len, u8 action, u32 tcp_seq_num, u32 tcp_ack_num);

/** * rxhand_tcp() - An incoming packet handler. + * @tcp: TCP stream * @pkt: pointer to the application packet * @dport: destination TCP port * @sip: source IP address @@ -324,8 +368,7 @@ int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int dport, * @action: TCP action (SYN, ACK, FIN, etc) * @len: packet length */ -typedef void rxhand_tcp(uchar *pkt, u16 dport, - struct in_addr sip, u16 sport, +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); diff --git a/net/fastboot_tcp.c b/net/fastboot_tcp.c index d1fccbc7238..4d34fdc5a45 100644 --- a/net/fastboot_tcp.c +++ b/net/fastboot_tcp.c @@ -8,14 +8,14 @@ #include <net/fastboot_tcp.h> #include <net/tcp.h>

-static char command[FASTBOOT_COMMAND_LEN] = {0}; -static char response[FASTBOOT_RESPONSE_LEN] = {0}; +#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 u16 curr_sport; -static u16 curr_dport; static u32 curr_tcp_seq_num; static u32 curr_tcp_ack_num; static unsigned int curr_request_len; @@ -25,34 +25,37 @@ static enum fastboot_tcp_state { FASTBOOT_DISCONNECTING } state = FASTBOOT_CLOSED;

-static void fastboot_tcp_answer(u8 action, unsigned int len) +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);

- net_send_tcp_packet(len, htons(curr_sport), htons(curr_dport), + net_send_tcp_packet(len, tcp->rhost, tcp->rport, tcp->lport, action, response_seq_num, response_ack_num); }

-static void fastboot_tcp_reset(void) +static void fastboot_tcp_reset(struct tcp_stream *tcp) { - fastboot_tcp_answer(TCP_RST, 0); + fastboot_tcp_answer(tcp, TCP_RST, 0); state = FASTBOOT_CLOSED; }

-static void fastboot_tcp_send_packet(u8 action, const uchar *data, unsigned int len) +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();

memset(pkt, '\0', PKTSIZE); pkt += net_eth_hdr_size() + IP_TCP_HDR_SIZE + TCP_TSOPT_SIZE + 2; memcpy(pkt, data, len); - fastboot_tcp_answer(action, len); + fastboot_tcp_answer(tcp, action, len); memset(pkt, '\0', PKTSIZE); }

-static void fastboot_tcp_send_message(const char *message, unsigned int len) +static void fastboot_tcp_send_message(struct tcp_stream *tcp, + const char *message, unsigned int len) { __be64 len_be = __cpu_to_be64(len); uchar *pkt = net_get_async_tx_pkt_buf(); @@ -63,12 +66,11 @@ static void fastboot_tcp_send_message(const char *message, unsigned int len) memcpy(pkt, &len_be, 8); pkt += 8; memcpy(pkt, message, len); - fastboot_tcp_answer(TCP_ACK | TCP_PUSH, len + 8); + fastboot_tcp_answer(tcp, TCP_ACK | TCP_PUSH, len + 8); memset(pkt, '\0', PKTSIZE); }

-static void fastboot_tcp_handler_ipv4(uchar *pkt, u16 dport, - struct in_addr sip, u16 sport, +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) { @@ -77,8 +79,6 @@ static void fastboot_tcp_handler_ipv4(uchar *pkt, u16 dport, u8 tcp_fin = action & TCP_FIN; u8 tcp_push = action & TCP_PUSH;

- curr_sport = sport; - curr_dport = dport; curr_tcp_seq_num = tcp_seq_num; curr_tcp_ack_num = tcp_ack_num; curr_request_len = len; @@ -89,17 +89,17 @@ static void fastboot_tcp_handler_ipv4(uchar *pkt, u16 dport, if (len != handshake_length || strlen(pkt) != handshake_length || memcmp(pkt, handshake, handshake_length) != 0) { - fastboot_tcp_reset(); + fastboot_tcp_reset(tcp); break; } - fastboot_tcp_send_packet(TCP_ACK | TCP_PUSH, + 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_FIN | TCP_ACK, 0); + fastboot_tcp_answer(tcp, TCP_FIN | TCP_ACK, 0); state = FASTBOOT_DISCONNECTING; break; } @@ -111,12 +111,12 @@ static void fastboot_tcp_handler_ipv4(uchar *pkt, u16 dport,

// Only single packet messages are supported ATM if (strlen(pkt) != command_size) { - fastboot_tcp_reset(); + fastboot_tcp_reset(tcp); break; } strlcpy(command, pkt, len + 1); fastboot_command_id = fastboot_handle_command(command, response); - fastboot_tcp_send_message(response, strlen(response)); + fastboot_tcp_send_message(tcp, response, strlen(response)); fastboot_handle_boot(fastboot_command_id, strncmp("OKAY", response, 4) == 0); } @@ -129,17 +129,21 @@ static void fastboot_tcp_handler_ipv4(uchar *pkt, u16 dport,

memset(command, 0, FASTBOOT_COMMAND_LEN); memset(response, 0, FASTBOOT_RESPONSE_LEN); - curr_sport = 0; - curr_dport = 0; curr_tcp_seq_num = 0; curr_tcp_ack_num = 0; curr_request_len = 0; }

+static int incoming_filter(struct in_addr rhost, u16 rport, u16 lport) +{ + return (lport == FASTBOOT_TCP_PORT); +} + void fastboot_tcp_start_server(void) { 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 e12ac55c401..62d1c5b1e82 100644 --- a/net/net.c +++ b/net/net.c @@ -420,7 +420,7 @@ int net_init(void) /* Only need to setup buffer pointers once. */ first_call = 0; if (IS_ENABLED(CONFIG_PROT_TCP)) - tcp_set_tcp_state(tcp_stream_get(), TCP_CLOSED); + tcp_init(); }

return net_init_loop(); @@ -908,10 +908,10 @@ int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport, }

#if defined(CONFIG_PROT_TCP) -int net_send_tcp_packet(int payload_len, int dport, int sport, u8 action, - u32 tcp_seq_num, u32 tcp_ack_num) +int net_send_tcp_packet(int payload_len, struct in_addr dhost, int dport, + int sport, u8 action, u32 tcp_seq_num, u32 tcp_ack_num) { - return net_send_ip_packet(net_server_ethaddr, net_server_ip, dport, + return net_send_ip_packet(net_server_ethaddr, dhost, dport, sport, payload_len, IPPROTO_TCP, action, tcp_seq_num, tcp_ack_num); } @@ -953,12 +953,12 @@ int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport, break; #if defined(CONFIG_PROT_TCP) case IPPROTO_TCP: - tcp = tcp_stream_get(); + tcp = tcp_stream_get(0, dest, dport, sport); if (!tcp) return -EINVAL;

pkt_hdr_size = eth_hdr_size - + tcp_set_tcp_header(tcp, pkt + eth_hdr_size, dport, sport, + + tcp_set_tcp_header(tcp, pkt + eth_hdr_size, payload_len, action, tcp_seq_num, tcp_ack_num); break; diff --git a/net/tcp.c b/net/tcp.c index 8eeb43b8796..db708f0a2a5 100644 --- a/net/tcp.c +++ b/net/tcp.c @@ -26,6 +26,7 @@

static int tcp_activity_count; static struct tcp_stream tcp_stream; +static tcp_incoming_filter *incoming_filter;

/* * TCP lengths are stored as a rounded up number of 32 bit words. @@ -40,40 +41,95 @@ static struct tcp_stream tcp_stream; /* Current TCP RX packet handler */ static rxhand_tcp *tcp_packet_handler;

+#define RANDOM_PORT_START 1024 +#define RANDOM_PORT_RANGE 0x4000 + +/** + * random_port() - make port a little random (1024-17407) + * + * Return: random port number from 1024 to 17407 + * + * This keeps the math somewhat trivial to compute, and seems to work with + * all supported protocols/clients/servers + */ +static uint random_port(void) +{ + return RANDOM_PORT_START + (get_timer(0) % RANDOM_PORT_RANGE); +} + static inline s32 tcp_seq_cmp(u32 a, u32 b) { return (s32)(a - b); }

/** - * tcp_get_tcp_state() - get TCP stream state + * tcp_stream_get_state() - get TCP stream state * @tcp: tcp stream * * Return: TCP stream state */ -enum tcp_state tcp_get_tcp_state(struct tcp_stream *tcp) +enum tcp_state tcp_stream_get_state(struct tcp_stream *tcp) { return tcp->state; }

/** - * tcp_set_tcp_state() - set TCP stream state + * tcp_stream_set_state() - set TCP stream state * @tcp: tcp stream * @new_state: new TCP state */ -void tcp_set_tcp_state(struct tcp_stream *tcp, - enum tcp_state new_state) +static void tcp_stream_set_state(struct tcp_stream *tcp, + enum tcp_state new_state) { tcp->state = new_state; }

-struct tcp_stream *tcp_stream_get(void) +void tcp_init(void) +{ + incoming_filter = NULL; + tcp_stream.state = TCP_CLOSED; +} + +void tcp_set_incoming_filter(tcp_incoming_filter *filter) +{ + incoming_filter = filter; +} + +static struct tcp_stream *tcp_stream_add(struct in_addr rhost, + u16 rport, u16 lport) +{ + struct tcp_stream *tcp = &tcp_stream; + + if (tcp->state != TCP_CLOSED) + return NULL; + + 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; + return tcp; +} + +struct tcp_stream *tcp_stream_get(int is_new, struct in_addr rhost, + u16 rport, u16 lport) { - return &tcp_stream; + struct tcp_stream *tcp = &tcp_stream; + + if (tcp->rhost.s_addr == rhost.s_addr && + tcp->rport == rport && + tcp->lport == lport) + return tcp; + + if (!is_new || !incoming_filter || + !incoming_filter(rhost, rport, lport)) + return NULL; + + return tcp_stream_add(rhost, rport, lport); }

-static void dummy_handler(uchar *pkt, u16 dport, - struct in_addr sip, u16 sport, +static void dummy_handler(struct tcp_stream *tcp, uchar *pkt, u32 tcp_seq_num, u32 tcp_ack_num, u8 action, unsigned int len) { @@ -222,8 +278,7 @@ void net_set_syn_options(struct tcp_stream *tcp, union tcp_build_pkt *b) b->ip.end = TCP_O_END; }

-int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int dport, - int sport, int payload_len, +int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int payload_len, u8 action, u32 tcp_seq_num, u32 tcp_ack_num) { union tcp_build_pkt *b = (union tcp_build_pkt *)pkt; @@ -243,7 +298,7 @@ int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int dport, case TCP_SYN: debug_cond(DEBUG_DEV_PKT, "TCP Hdr:SYN (%pI4, %pI4, sq=%u, ak=%u)\n", - &net_server_ip, &net_ip, + &tcp->rhost, &net_ip, tcp_seq_num, tcp_ack_num); tcp_activity_count = 0; net_set_syn_options(tcp, b); @@ -264,13 +319,13 @@ int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int dport, b->ip.hdr.tcp_flags = action; debug_cond(DEBUG_DEV_PKT, "TCP Hdr:ACK (%pI4, %pI4, s=%u, a=%u, A=%x)\n", - &net_server_ip, &net_ip, tcp_seq_num, tcp_ack_num, + &tcp->rhost, &net_ip, tcp_seq_num, tcp_ack_num, action); break; case TCP_FIN: debug_cond(DEBUG_DEV_PKT, "TCP Hdr:FIN (%pI4, %pI4, s=%u, a=%u)\n", - &net_server_ip, &net_ip, tcp_seq_num, tcp_ack_num); + &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; @@ -279,7 +334,7 @@ int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int dport, case TCP_RST: debug_cond(DEBUG_DEV_PKT, "TCP Hdr:RST (%pI4, %pI4, s=%u, a=%u)\n", - &net_server_ip, &net_ip, tcp_seq_num, tcp_ack_num); + &tcp->rhost, &net_ip, tcp_seq_num, tcp_ack_num); tcp->state = TCP_CLOSED; break; /* Notify connection closing */ @@ -290,7 +345,7 @@ int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int dport,

debug_cond(DEBUG_DEV_PKT, "TCP Hdr:FIN ACK PSH(%pI4, %pI4, s=%u, a=%u, A=%x)\n", - &net_server_ip, &net_ip, + &tcp->rhost, &net_ip, tcp_seq_num, tcp_ack_num, action); fallthrough; default: @@ -298,7 +353,7 @@ int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int dport, b->ip.hdr.tcp_flags = action | TCP_PUSH | TCP_ACK; debug_cond(DEBUG_DEV_PKT, "TCP Hdr:dft (%pI4, %pI4, s=%u, a=%u, A=%x)\n", - &net_server_ip, &net_ip, + &tcp->rhost, &net_ip, tcp_seq_num, tcp_ack_num, action); }

@@ -308,8 +363,8 @@ int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int dport, tcp->ack_edge = tcp_ack_num; /* TCP Header */ b->ip.hdr.tcp_ack = htonl(tcp->ack_edge); - b->ip.hdr.tcp_src = htons(sport); - b->ip.hdr.tcp_dst = htons(dport); + b->ip.hdr.tcp_src = htons(tcp->lport); + b->ip.hdr.tcp_dst = htons(tcp->rport); b->ip.hdr.tcp_seq = htonl(tcp_seq_num);

/* @@ -332,10 +387,10 @@ int tcp_set_tcp_header(struct tcp_stream *tcp, uchar *pkt, int dport, b->ip.hdr.tcp_xsum = 0; b->ip.hdr.tcp_ugr = 0;

- b->ip.hdr.tcp_xsum = tcp_set_pseudo_header(pkt, net_ip, net_server_ip, + b->ip.hdr.tcp_xsum = tcp_set_pseudo_header(pkt, net_ip, tcp->rhost, tcp_len, pkt_len);

- net_set_ip_header((uchar *)&b->ip, net_server_ip, net_ip, + net_set_ip_header((uchar *)&b->ip, tcp->rhost, net_ip, pkt_len, IPPROTO_TCP);

return pkt_hdr_len; @@ -616,19 +671,26 @@ void rxhand_tcp_f(union tcp_build_pkt *b, unsigned int pkt_len) u32 tcp_seq_num, tcp_ack_num; int tcp_hdr_len, payload_len; struct tcp_stream *tcp; + struct in_addr src;

/* Verify IP header */ debug_cond(DEBUG_DEV_PKT, "TCP RX in RX Sum (to=%pI4, from=%pI4, len=%d)\n", &b->ip.hdr.ip_src, &b->ip.hdr.ip_dst, pkt_len);

- b->ip.hdr.ip_src = net_server_ip; + /* + * src IP address will be destroyed by TCP checksum verification + * algorithm (see tcp_set_pseudo_header()), so remember it before + * it was garbaged. + */ + src.s_addr = b->ip.hdr.ip_src.s_addr; + b->ip.hdr.ip_dst = net_ip; b->ip.hdr.ip_sum = 0; if (tcp_rx_xsum != compute_ip_checksum(b, IP_HDR_SIZE)) { debug_cond(DEBUG_DEV_PKT, "TCP RX IP xSum Error (%pI4, =%pI4, len=%d)\n", - &net_ip, &net_server_ip, pkt_len); + &net_ip, &src, pkt_len); return; }

@@ -640,11 +702,14 @@ void rxhand_tcp_f(union tcp_build_pkt *b, unsigned int pkt_len) pkt_len)) { debug_cond(DEBUG_DEV_PKT, "TCP RX TCP xSum Error (%pI4, %pI4, len=%d)\n", - &net_ip, &net_server_ip, tcp_len); + &net_ip, &src, tcp_len); return; }

- tcp = tcp_stream_get(); + tcp = tcp_stream_get(b->ip.hdr.tcp_flags & TCP_SYN, + src, + ntohs(b->ip.hdr.tcp_src), + ntohs(b->ip.hdr.tcp_dst)); if (!tcp) return;

@@ -676,9 +741,9 @@ void rxhand_tcp_f(union tcp_build_pkt *b, unsigned int pkt_len) "TCP Notify (action=%x, Seq=%u,Ack=%u,Pay%d)\n", tcp_action, tcp_seq_num, tcp_ack_num, payload_len);

- (*tcp_packet_handler) ((uchar *)b + pkt_len - payload_len, b->ip.hdr.tcp_dst, - b->ip.hdr.ip_src, b->ip.hdr.tcp_src, tcp_seq_num, - tcp_ack_num, tcp_action, payload_len); + (*tcp_packet_handler) (tcp, (uchar *)b + pkt_len - payload_len, + tcp_seq_num, tcp_ack_num, tcp_action, + payload_len);

} else if (tcp_action != TCP_DATA) { debug_cond(DEBUG_DEV_PKT, @@ -689,9 +754,13 @@ void rxhand_tcp_f(union tcp_build_pkt *b, unsigned int pkt_len) * Warning: Incoming Ack & Seq sequence numbers are transposed * here to outgoing Seq & Ack sequence numbers */ - net_send_tcp_packet(0, ntohs(b->ip.hdr.tcp_src), - ntohs(b->ip.hdr.tcp_dst), + net_send_tcp_packet(0, tcp->rhost, tcp->rport, tcp->lport, (tcp_action & (~TCP_PUSH)), tcp_ack_num, tcp->ack_edge); } } + +struct tcp_stream *tcp_stream_connect(struct in_addr rhost, u16 rport) +{ + return tcp_stream_add(rhost, rport, random_port()); +} diff --git a/net/wget.c b/net/wget.c index 0213e3ff51d..a175533ada9 100644 --- a/net/wget.c +++ b/net/wget.c @@ -28,9 +28,8 @@ static const char bootfile3[] = " HTTP/1.0\r\n\r\n"; static const char http_eom[] = "\r\n\r\n"; static const char content_len[] = "Content-Length"; static const char linefeed[] = "\r\n"; -static struct in_addr web_server_ip; -static int our_port; static int wget_timeout_count; +struct tcp_stream *tcp;

struct pkt_qd { uchar *pkt; @@ -110,22 +109,19 @@ static void wget_send_stored(void) 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; - unsigned int server_port; uchar *ptr, *offset;

- server_port = env_get_ulong("httpdstp", 10, SERVER_PORT) & 0xffff; - 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, server_port, our_port, action, + 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, server_port, our_port, action, + 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() + @@ -149,14 +145,14 @@ static void wget_send_stored(void)

memcpy(offset, &bootfile3, strlen(bootfile3)); offset += strlen(bootfile3); - net_send_tcp_packet((offset - ptr), server_port, our_port, + 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, server_port, our_port, action, + net_send_tcp_packet(0, tcp->rhost, tcp->rport, tcp->lport, action, tcp_seq_num, tcp_ack_num); break; } @@ -348,10 +344,8 @@ static void wget_connected(uchar *pkt, unsigned int tcp_seq_num,

/** * wget_handler() - TCP handler of wget + * @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) @@ -360,13 +354,11 @@ static void wget_connected(uchar *pkt, unsigned int tcp_seq_num, * In the "application push" invocation, the TCP header with all * its information is pointed to by the packet pointer. */ -static void wget_handler(uchar *pkt, u16 dport, - struct in_addr sip, u16 sport, +static void wget_handler(struct tcp_stream *tcp, uchar *pkt, u32 tcp_seq_num, u32 tcp_ack_num, u8 action, unsigned int len) { - struct tcp_stream *tcp = tcp_stream_get(); - enum tcp_state wget_tcp_state = tcp_get_tcp_state(tcp); + enum tcp_state wget_tcp_state = tcp_stream_get_state(tcp);

net_set_timeout_handler(wget_timeout, wget_timeout_handler); packets++; @@ -457,26 +449,13 @@ static void wget_handler(uchar *pkt, u16 dport, } }

-#define RANDOM_PORT_START 1024 -#define RANDOM_PORT_RANGE 0x4000 - -/** - * random_port() - make port a little random (1024-17407) - * - * Return: random port number from 1024 to 17407 - * - * This keeps the math somewhat trivial to compute, and seems to work with - * all supported protocols/clients/servers - */ -static unsigned int random_port(void) -{ - return RANDOM_PORT_START + (get_timer(0) % RANDOM_PORT_RANGE); -} - #define BLOCKSIZE 512

void wget_start(void) { + struct in_addr web_server_ip; + unsigned int server_port; + if (!wget_info) wget_info = &default_wget_info;

@@ -523,8 +502,6 @@ void wget_start(void) wget_timeout_count = 0; current_wget_state = WGET_CLOSED;

- our_port = random_port(); - /* * Zero out server ether to force arp resolution in case * the server ip for the previous u-boot command, for example dns @@ -533,6 +510,13 @@ void wget_start(void)

memset(net_server_ethaddr, 0, 6);

+ server_port = env_get_ulong("httpdstp", 10, SERVER_PORT) & 0xffff; + tcp = tcp_stream_connect(web_server_ip, server_port); + if (!tcp) { + net_set_state(NETLOOP_FAIL); + return; + } + wget_send(TCP_SYN, 0, 0, 0); }

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@iopsys.eu Reviewed-by: Simon Glass sjg@chromium.org --- include/net/tcp.h | 201 ++++++++-- include/net/wget.h | 8 - net/fastboot_tcp.c | 193 +++++----- net/net.c | 4 + net/tcp.c | 891 +++++++++++++++++++++++++++++++++++---------- net/wget.c | 530 +++++++++------------------ 6 files changed, 1128 insertions(+), 699 deletions(-)

diff --git a/include/net/tcp.h b/include/net/tcp.h index 0694af9d5b1..5022fa9dc1b 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 +275,22 @@ 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 + * @TCP_ERR_IO: input/output error + */ +enum tcp_status { + TCP_ERR_OK = 0, + TCP_ERR_TOUT, + TCP_ERR_RST, + TCP_ERR_IO };

/** @@ -283,51 +299,156 @@ 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 or negative value + * on error. + * 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 or negative + * value on error. + * 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) + * @rx_packets: total number of received packets + * @tx_packets: total number of transmitted packets + * + * @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); + int (*rx)(struct tcp_stream *tcp, u32 rx_offs, void *buf, int len); + int (*tx)(struct tcp_stream *tcp, u32 tx_offs, void *buf, int 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; + u32 rx_packets; + u32 tx_packets; + + 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 +472,51 @@ 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..3ea25c997fc 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 int tcp_stream_rx(struct tcp_stream *tcp, u32 rx_offs, void *buf, int 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 int tcp_stream_tx(struct tcp_stream *tcp, u32 tx_offs, void *buf, int 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 62d1c5b1e82..fd634405e8a 100644 --- a/net/net.c +++ b/net/net.c @@ -652,6 +652,9 @@ restart: * errors that may have happened. */ eth_rx(); +#if defined(CONFIG_PROT_TCP) + tcp_streams_poll(); +#endif

/* * Abort if ctrl-c was pressed. @@ -961,6 +964,7 @@ 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 7c713a5ca56..a2941951834 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_status 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 +212,226 @@ 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) +{ + 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) +{ + tcp->tx_packets++; + 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; + int ret; + + 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 */ + ret = tcp->tx(tcp, tcp->retry_tx_offs, ptr, tcp->retry_tx_len); + if (ret < 0) { + puts("\nTCP: send failure\n"); + tcp_send_packet(tcp, TCP_RST, tcp->retry_seq_num, + tcp->rcv_nxt, 0); + tcp_stream_set_status(tcp, TCP_ERR_IO); + tcp_stream_set_state(tcp, TCP_CLOSED); + tcp_stream_destroy(tcp); + return; + } + } + 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) { - 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; + uchar *ptr; + int tx_len; + u32 tx_offs, 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 < 0) { + puts("\nTCP: send failure\n"); + tcp_send_packet(tcp, TCP_RST, tcp->retry_seq_num, + tcp->rcv_nxt, 0); + tcp_stream_set_status(tcp, TCP_ERR_IO); + tcp_stream_set_state(tcp, TCP_CLOSED); + tcp_stream_destroy(tcp); + return; + } + 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 +526,6 @@ 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 +585,8 @@ 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 +603,16 @@ 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 +652,7 @@ 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 +771,7 @@ 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 +786,13 @@ 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 +807,344 @@ 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) { - 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; + 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) +{ + 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) +{ + int tmp_len; + u32 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 < 0) { + puts("\nTCP: receive failure\n"); + tcp_send_packet(tcp, TCP_RST, tcp->snd_una, + tcp->rcv_nxt, 0); + tcp_stream_set_status(tcp, TCP_ERR_IO); + tcp_stream_set_state(tcp, TCP_CLOSED); + tcp_stream_destroy(tcp); + return TCP_PACKET_DROP; + } + } + 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 +1156,6 @@ 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 +1199,59 @@ 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_packets++; + 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 a175533ada9..088796172e7 100644 --- a/net/wget.c +++ b/net/wget.c @@ -22,48 +22,23 @@ DECLARE_GLOBAL_DATA_PTR; /* The default, change with environment variable 'httpdstp' */ #define SERVER_PORT 80

-static const char bootfileGET[] = "GET "; -static const char bootfileHEAD[] = "HEAD "; -static const char bootfile3[] = " HTTP/1.0\r\n\r\n"; -static const char http_eom[] = "\r\n\r\n"; -static const char content_len[] = "Content-Length"; -static const char linefeed[] = "\r\n"; -static int wget_timeout_count; -struct tcp_stream *tcp; +#define HASHES_PER_LINE 65

-struct pkt_qd { - uchar *pkt; - unsigned int tcp_seq_num; - unsigned int len; -}; +#define HTTP_MAX_HDR_LEN 2048

-/* - * 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 const char http_proto[] = "HTTP/1.0"; +static const char http_eom[] = "\r\n\r\n"; +static const char content_len[] = "Content-Length:"; +static const char linefeed[] = "\r\n"; +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, max_rx_pos; +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 */ - /** * store_block() - store block in memory * @src: source of data @@ -73,7 +48,6 @@ static int retry_len; /* TCP retry length */ 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 (CONFIG_IS_ENABLED(LMB) && wget_info->set_bootdev) { @@ -89,372 +63,221 @@ 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(u32 packets) { - 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; - - switch (wget_info->method) { - case WGET_HTTP_METHOD_HEAD: - memcpy(offset, &bootfileHEAD, strlen(bootfileHEAD)); - offset += strlen(bootfileHEAD); - break; - case WGET_HTTP_METHOD_GET: - default: - memcpy(offset, &bootfileGET, strlen(bootfileGET)); - offset += strlen(bootfileGET); - break; - } + int cnt;

- memcpy(offset, image_url, strlen(image_url)); - offset += strlen(image_url); + if (content_length != -1) { + if (net_boot_file_size > content_length) + content_length = net_boot_file_size;

- 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; + 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"); } }

-static void wget_send(u8 action, unsigned int tcp_seq_num, - unsigned int tcp_ack_num, int len) +static void tcp_stream_on_closed(struct tcp_stream *tcp) { - retry_action = action; - retry_tcp_ack_num = tcp_ack_num; - retry_tcp_seq_num = tcp_seq_num; - retry_len = len; + if (tcp->status != TCP_ERR_OK) + wget_loop_state = NETLOOP_FAIL;

- wget_send_stored(); -} + net_set_state(wget_loop_state); + if (wget_loop_state != NETLOOP_SUCCESS) { + net_boot_file_size = 0; + printf("\nwget: Transfer Fail, TCP status - %d\n", tcp->status); + return; + }

-void wget_fail(char *error_message, unsigned int tcp_seq_num, - unsigned int tcp_ack_num, u8 action) -{ - printf("wget: Transfer Fail - %s\n", error_message); - net_set_timeout_handler(0, NULL); - wget_send(action, tcp_seq_num, tcp_ack_num, 0); + printf("\nPackets received %d, Transfer Successful\n", tcp->rx_packets); + wget_info->file_size = net_boot_file_size; + if (wget_info->method == WGET_HTTP_METHOD_GET && wget_info->set_bootdev) { + efi_set_bootdev("Http", NULL, image_url, + map_sysmem(image_load_addr, 0), + net_boot_file_size); + env_set_hex("filesize", net_boot_file_size); + } }

-/* - * Interfaces of U-BOOT - */ -static void wget_timeout_handler(void) +static void tcp_stream_on_rcv_nxt_update(struct tcp_stream *tcp, u32 rx_bytes) { - 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(); + char *pos, *tail; + uchar saved, *ptr; + int reply_len; + + if (http_hdr_size) { + net_boot_file_size = rx_bytes - http_hdr_size; + show_block_marker(tcp->rx_packets); + return; } -}

-#define PKT_QUEUE_OFFSET 0x20000 -#define PKT_QUEUE_PACKET_SIZE 0x800 + ptr = map_sysmem(image_load_addr, rx_bytes + 1);

-static void wget_fill_info(const uchar *pkt, int hlen) -{ - const char *first_space; - const char *second_space; - char *pos, *end; - - if (wget_info->headers) { - if (hlen < MAX_HTTP_HEADERS_SIZE) - strncpy(wget_info->headers, pkt, hlen); - else - hlen = 0; - wget_info->headers[hlen] = 0; - } + saved = ptr[rx_bytes]; + ptr[rx_bytes] = '\0'; + pos = strstr((char *)ptr, http_eom); + ptr[rx_bytes] = saved; + + if (!pos) { + if (rx_bytes < HTTP_MAX_HDR_LEN && + tcp->state == TCP_ESTABLISHED) + goto end;

- //Get status code - first_space = strchr(pkt, ' '); - if (!first_space) { + printf("ERROR: misssed HTTP header\n"); + tcp_stream_close(tcp); + wget_loop_state = NETLOOP_FAIL; wget_info->status_code = -1; - return; + goto end; }

- second_space = strchr(first_space + 1, ' '); - if (!second_space) { + http_hdr_size = pos - (char *)ptr + strlen(http_eom); + *pos = '\0'; + + if (wget_info->headers && http_hdr_size < MAX_HTTP_HEADERS_SIZE) + strcpy(wget_info->headers, ptr); + + /* check for HTTP proto */ + if (strncasecmp((char *)ptr, "HTTP/", 5)) { + debug_cond(DEBUG_WGET, "wget: Connected Bad Xfer " + "(no HTTP Status Line found)\n"); + tcp_stream_close(tcp); + wget_loop_state = NETLOOP_FAIL; wget_info->status_code = -1; - return; + goto end; }

- wget_info->status_code = (u32)simple_strtoul(first_space + 1, &end, 10); + /* get HTTP reply len */ + pos = strstr((char *)ptr, linefeed); + if (pos) + reply_len = pos - (char *)ptr; + else + reply_len = http_hdr_size - strlen(http_eom); + + pos = strchr((char *)ptr, ' '); + if (!pos || pos - (char *)ptr > reply_len) { + debug_cond(DEBUG_WGET, "wget: Connected Bad Xfer " + "(no HTTP Status Code found)\n"); + tcp_stream_close(tcp); + wget_loop_state = NETLOOP_FAIL; + wget_info->status_code = -1; + goto end; + }

- if (second_space != end) + wget_info->status_code = (u32)simple_strtoul(pos + 1, &tail, 10); + if (tail == pos + 1 || *tail != ' ') { + debug_cond(DEBUG_WGET, "wget: Connected Bad Xfer " + "(bad HTTP Status Code)\n"); + tcp_stream_close(tcp); + wget_loop_state = NETLOOP_FAIL; wget_info->status_code = -1; + goto end; + }

- pos = strstr((char *)pkt, content_len); + debug_cond(DEBUG_WGET, + "wget: HTTP Status Code %d\n", wget_info->status_code); + + if (wget_info->status_code != 200) { + 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: Connctd pkt %p hlen %x\n", + ptr, http_hdr_size); + + content_length = -1; + pos = strstr((char *)ptr, content_len); if (pos) { - pos += sizeof(content_len) + 1; + pos += strlen(content_len) + 1; while (*pos == ' ') pos++; - content_length = simple_strtoul(pos, &end, 10); + content_length = simple_strtoul(pos, &tail, 10); + if (*tail != '\r' && *tail != '\n' && *tail != '\0') + content_length = -1; + } + + if (content_length >= 0) { debug_cond(DEBUG_WGET, "wget: Connected Len %lu\n", content_length); wget_info->hdr_cont_len = content_length; } -} - -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;

- pkt[len] = '\0'; - pos = strstr((char *)pkt, http_eom); + net_boot_file_size = rx_bytes - http_hdr_size; + memmove(ptr, ptr + http_hdr_size, max_rx_pos + 1 - http_hdr_size);

- 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((ulong)pkt_in_q, len); - memcpy(ptr1, pkt, len); - unmap_sysmem(ptr1); +end: + unmap_sysmem(ptr);

- 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++; + wget_loop_state = NETLOOP_SUCCESS; +}

- if (pkt_q_idx >= PKTQ_SZ) { - printf("wget: Fatal error, queue overrun!\n"); - net_set_state(NETLOOP_FAIL); +static int tcp_stream_rx(struct tcp_stream *tcp, u32 rx_offs, void *buf, int len) +{ + if ((max_rx_pos == (u32)(-1)) || (max_rx_pos < rx_offs + len - 1)) + max_rx_pos = rx_offs + len - 1;

- 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; - - wget_fill_info(pkt, hlen); - debug_cond(DEBUG_WGET, - "wget: HTTP Status Code %d\n", wget_info->status_code); + store_block(buf, rx_offs - http_hdr_size, len);

- if (wget_info->status_code != 200) { - 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: Connected Pkt %p hlen %x\n", - pkt, hlen); - - 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; - } - } - - for (i = 0; i < pkt_q_idx; i++) { - int err; - - ptr1 = map_sysmem((ulong)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: Conncted 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; - } - } - } - } - wget_send(action, tcp_seq_num, tcp_ack_num, len); + return len; }

-/** - * 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 int tcp_stream_tx(struct tcp_stream *tcp, u32 tx_offs, void *buf, int maxlen) { - enum tcp_state wget_tcp_state = tcp_stream_get_state(tcp); + int ret; + const char *method;

- net_set_timeout_handler(wget_timeout, wget_timeout_handler); - packets++; + if (tx_offs) + return 0;

- 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); - } - } + switch (wget_info->method) { + case WGET_HTTP_METHOD_HEAD: + method = "HEAD"; 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); - } + case WGET_HTTP_METHOD_GET: + default: + method = "GET"; 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; + ret = snprintf(buf, maxlen, "%s %s %s\r\n\r\n", + method, image_url, http_proto);

- 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; - } + return 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); - wget_info->file_size = net_boot_file_size; - if (wget_info->method == WGET_HTTP_METHOD_GET && wget_info->set_bootdev) { - efi_set_bootdev("Http", NULL, image_url, - map_sysmem(image_load_addr, 0), - net_boot_file_size); - env_set_hex("filesize", net_boot_file_size); - } - break; - } +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;

if (!wget_info) wget_info = &default_wget_info; @@ -496,12 +319,6 @@ void wget_start(void) debug_cond(DEBUG_WGET, "\nwget:Load address: 0x%lx\nLoading: *\b", image_load_addr);

- 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 @@ -510,14 +327,25 @@ void wget_start(void)

memset(net_server_ethaddr, 0, 6);

+ max_rx_pos = (u32)(-1); + net_boot_file_size = 0; + http_hdr_size = 0; + wget_tsize_num_hash = 0; + wget_loop_state = NETLOOP_FAIL; + + wget_info->status_code = -1; + if (wget_info->headers) + wget_info->headers[0] = 0; + 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) { + printf("No free tcp streams\n"); net_set_state(NETLOOP_FAIL); return; } - - wget_send(TCP_SYN, 0, 0, 0); + tcp_stream_put(tcp); }

int wget_do_request(ulong dst_addr, char *uri)

According to HTTP/1.0 standard the HTTP reply consist of * Status Line + CRLF * Zero or more Response Header Fields (each ended with CRLF) * CRLF on new line (Response Header Fields end marker) * Optional Entity Body.

Thus in response headers we state: Content-Length = 30 but actual transferred file data is: "\r\n<html><body>Hi</body></html>\r\n". This is 32 bytes of data.

So we get and check for correctness 32 bytes of data, but * The response we are used is incorrect, real server will set Content-Length to 32. * default_wget_info->hdr_cont_len will be set to wrong value 30 (used for efi http booting).

Fix an issue by: * replace bogus response with an actual response from the HTTP server * format response to show HTTP response structure * recalculate md5sum as transferred file data has been changed.

The server response was captured with the commands

echo -ne "<html><body>Hi</body></html>\n" > ~/public_html/test.html echo -ne "GET /~${USER}/test.html HTTP/1.0\r\n\r\n" | netcat localhost 80 >reply.txt

Signed-off-by: Mikhail Kshevetskiy mikhail.kshevetskiy@iopsys.eu --- test/cmd/wget.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/test/cmd/wget.c b/test/cmd/wget.c index d51650d5854..b020d20ad70 100644 --- a/test/cmd/wget.c +++ b/test/cmd/wget.c @@ -107,9 +107,22 @@ static int sb_ack_handler(struct udevice *dev, void *packet, int payload_len = 0; u32 tcp_seq, tcp_ack; int tcp_data_len; - const char *payload1 = "HTTP/1.1 200 OK\r\n" - "Content-Length: 30\r\n\r\n\r\n" - "<html><body>Hi</body></html>\r\n"; + const char *payload1 = + /* response status line */ + "HTTP/1.1 200 OK\r\n" + /* response header fields */ + "Date: Mon, 23 Dec 2024 05:18:23 GMT\r\n" + "Server: Apache/2.4.62 (Debian)\r\n" + "Last-Modified: Mon, 23 Dec 2024 05:04:50 GMT\r\n" + "ETag: "1d-629e8efb09e7b"\r\n" + "Accept-Ranges: bytes\r\n" + "Content-Length: 29\r\n" + "Connection: close\r\n" + "Content-Type: text/html\r\n" + /* response header fields end marker */ + "\r\n" + /* file data (for HTTP GET requests) */ + "<html><body>Hi</body></html>\n";

/* Don't allow the buffer to overrun */ if (priv->recv_packets >= PKTBUFSRX) @@ -136,11 +149,11 @@ static int sb_ack_handler(struct udevice *dev, void *packet,

if (tcp_seq == 1 && tcp_ack == 1) { if (tcp_data_len == 0) { - /* no data, wait for GET request */ + /* no data, wait for GET/HEAD request */ return -1; }

- /* reply to GET request */ + /* reply to GET/HEAD request */ payload_len = strlen(payload1); memcpy(data, payload1, payload_len); tcp_send->tcp_flags = TCP_ACK; @@ -215,12 +228,12 @@ static int net_test_wget(struct unit_test_state *uts) ut_assertok(run_command("wget ${loadaddr} 1.1.2.2:/index.html", 0)); ut_assert_nextline_empty(); ut_assert_nextline("Packets received 5, Transfer Successful"); - ut_assert_nextline("Bytes transferred = 32 (20 hex)"); + ut_assert_nextline("Bytes transferred = 29 (1d hex)");

sandbox_eth_set_tx_handler(0, NULL);

run_command("md5sum ${loadaddr} ${filesize}", 0); - ut_assert_nextline("md5 for 00020000 ... 0002001f ==> 234af48e94b0085060249ecb5942ab57"); + ut_assert_nextline("md5 for 00020000 ... 0002001c ==> 847d5e7320a27462e90bc1ed75eb8cd8"); ut_assert_console_end();

env_set("ethact", prev_ethact);

Some driver implements it's own network packet pool, so PKTBUFSRX is zero. This results in zero-size TCP receive window, so data transfer doesn't work. Avoid it by setting a reasonable fallback value.

Signed-off-by: Mikhail Kshevetskiy mikhail.kshevetskiy@iopsys.eu Reviewed-by: Simon Glass sjg@chromium.org --- net/tcp.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/net/tcp.c b/net/tcp.c index 2600f74b265..2635727f47d 100644 --- a/net/tcp.c +++ b/net/tcp.c @@ -36,7 +36,11 @@ #define TCP_SEND_RETRY 3 #define TCP_SEND_TIMEOUT 2000UL #define TCP_RX_INACTIVE_TIMEOUT 30000UL -#define TCP_RCV_WND_SIZE (PKTBUFSRX * TCP_MSS) +#if PKTBUFSRX != 0 + #define TCP_RCV_WND_SIZE (PKTBUFSRX * TCP_MSS) +#else + #define TCP_RCV_WND_SIZE (4 * TCP_MSS) +#endif

#define TCP_PACKET_OK 0 #define TCP_PACKET_DROP 1