1 /**************************************************************************/
2 /* */
3 /* Copyright (c) Microsoft Corporation. All rights reserved. */
4 /* */
5 /* This software is licensed under the Microsoft Software License */
6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */
7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
8 /* and in the root directory of this software. */
9 /* */
10 /**************************************************************************/
11
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /** */
16 /** NetX Component */
17 /** */
18 /** Transmission Control Protocol (TCP) */
19 /** */
20 /**************************************************************************/
21 /**************************************************************************/
22
23 #define NX_SOURCE_CODE
24
25
26 /* Include necessary system files. */
27
28 #include "nx_api.h"
29 #include "nx_tcp.h"
30
31
32 /**************************************************************************/
33 /* */
34 /* FUNCTION RELEASE */
35 /* */
36 /* _nx_tcp_packet_send_ack PORTABLE C */
37 /* 6.1 */
38 /* AUTHOR */
39 /* */
40 /* Yuxin Zhou, Microsoft Corporation */
41 /* */
42 /* DESCRIPTION */
43 /* */
44 /* This function sends an ACK from the specified socket. */
45 /* */
46 /* INPUT */
47 /* */
48 /* socket_ptr Pointer to socket */
49 /* tx_sequence Transmit sequence number */
50 /* */
51 /* OUTPUT */
52 /* */
53 /* None */
54 /* */
55 /* CALLS */
56 /* */
57 /* _nx_tcp_packet_send_control Send TCP control packet */
58 /* */
59 /* CALLED BY */
60 /* */
61 /* _nx_tcp_fast_periodic_processing Delayed ACK processing */
62 /* _nx_tcp_periodic_processing Regular periodic processing */
63 /* _nx_tcp_socket_receive Packet receive processing */
64 /* _nx_tcp_socket_state_ack_check Socket state ACK processing */
65 /* _nx_tcp_socket_state_data_check Socket state date processing */
66 /* _nx_tcp_socket_state_established Socket state established */
67 /* processing */
68 /* _nx_tcp_socket_state_fin_wait2 Socket state FIN wait-2 */
69 /* processing */
70 /* _nx_tcp_socket_state_fin_wait1 Socket state FIN wait */
71 /* processing */
72 /* _nx_tcp_socket_state_syn_sent Socket state SYN sent */
73 /* processing */
74 /* */
75 /* RELEASE HISTORY */
76 /* */
77 /* DATE NAME DESCRIPTION */
78 /* */
79 /* 05-19-2020 Yuxin Zhou Initial Version 6.0 */
80 /* 09-30-2020 Yuxin Zhou Modified comment(s), */
81 /* resulting in version 6.1 */
82 /* */
83 /**************************************************************************/
_nx_tcp_packet_send_ack(NX_TCP_SOCKET * socket_ptr,ULONG tx_sequence)84 VOID _nx_tcp_packet_send_ack(NX_TCP_SOCKET *socket_ptr, ULONG tx_sequence)
85 {
86 _nx_tcp_packet_send_control(socket_ptr, NX_TCP_ACK_BIT, tx_sequence,
87 socket_ptr -> nx_tcp_socket_rx_sequence, 0, 0, NX_NULL);
88
89 /* Setup a new delayed ACK timeout. */
90 socket_ptr -> nx_tcp_socket_delayed_ack_timeout = _nx_tcp_ack_timer_rate;
91 }
92
93
