Extended TCP/IP Feature Bitmap#

SL_SI91X_EXT_TCP_FEAT_DHCP_OPT77#

#define SL_SI91X_EXT_TCP_FEAT_DHCP_OPT77

BIT(1)

DHCP USER CLASS.

This feature enables DHCP Option 77, which allows the device to specify user class information in DHCP requests.

Note

• Bit 0 is reserved.

SL_SI91X_EXT_TCP_IP_BI_DIR_ACK_UPDATE#

#define SL_SI91X_EXT_TCP_IP_BI_DIR_ACK_UPDATE

BIT(3)

TCP bi-directional acknowledgment update.

This feature enables bi-directional data transfer by updating TCP acknowledgment handling.

Note

• Need to enable this bit if user wants to run the bi-directional data transfer.

• Bit 2 is reserved.

SL_SI91X_EXT_TCP_IP_WINDOW_DIV#

#define SL_SI91X_EXT_TCP_IP_WINDOW_DIV

BIT(4)

TCP RX window division.

This feature allows the division of the TCP receive window, enabling more granular control over the window size.

SL_SI91X_EXT_TCP_IP_CERT_BYPASS#

#define SL_SI91X_EXT_TCP_IP_CERT_BYPASS

BIT(5)

SSL server certificate bypass.

This feature allows the device to bypass SSL server certificate validation, with validation being performed by the host instead.

SL_SI91X_EXT_TCP_IP_SSL_16K_RECORD#

#define SL_SI91X_EXT_TCP_IP_SSL_16K_RECORD

BIT(6)

SSL 16K record size support.

This feature enables support for 16K SSL record sizes, improving performance for SSL connections that use larger record sizes.

SL_SI91X_EXT_TCP_IP_DNS_CLIENT_BYPASS#

#define SL_SI91X_EXT_TCP_IP_DNS_CLIENT_BYPASS

BIT(7)

Enable DNS client bypass.

This feature allows the device to bypass the internal DNS client, using the host for DNS resolution instead.

SL_SI91X_EXT_TCP_IP_WINDOW_SCALING#

#define SL_SI91X_EXT_TCP_IP_WINDOW_SCALING

BIT(8)

Enable TCP window scaling feature.

This feature enables TCP window scaling, allowing the device to use receive window sizes larger than 64 KB.

Note

• If this feature is not enabled, then the maximum possible RX window size is 64 KB. If user wants to use more than 64KB window size, tcp_rx_window_size_cap in socket configuration is used to increase the window size.

SL_SI91X_EXT_TCP_IP_DUAL_MODE_ENABLE#

#define SL_SI91X_EXT_TCP_IP_DUAL_MODE_ENABLE

BIT(9)

Enable both TCP/IP bypass mode and embedded modes.

This feature allows the device to use both bypass and non-bypass modes simultaneously, providing flexibility in network communication.

Note

• Enabling this feature allows to use both bypass and non-bypass modes simultaneously.

SL_SI91X_EXT_TCP_IP_ETH_WIFI_BRIDGE#

#define SL_SI91X_EXT_TCP_IP_ETH_WIFI_BRIDGE

BIT(10)

Enable Ethernet to WiFi bridge.

This feature enables the device to act as a bridge between Ethernet and WiFi networks, facilitating communication between the two.

SL_SI91X_EXT_DYNAMIC_COEX_MEMORY#

#define SL_SI91X_EXT_DYNAMIC_COEX_MEMORY

BIT(11)

Enable dynamic coexistence memory.

This feature dynamically adjusts the TCP receive window size based on coexistence requirements, improving network performance in coexistence scenarios.

Note

• To enable or disable the coexistence and update TCP RX window accordingly.

SL_SI91X_EXT_TCP_IP_TOTAL_SELECTS#

#define SL_SI91X_EXT_TCP_IP_TOTAL_SELECTS

(total_selects)

Configure the number of selects.

This feature configures the number of select operations the device can handle, with a maximum value of 10.

Note

• Bits 12 - 15 are used for TOTAL_SELECTS.

SL_SI91X_EXT_TCP_IP_WAIT_FOR_SOCKET_CLOSE#

#define SL_SI91X_EXT_TCP_IP_WAIT_FOR_SOCKET_CLOSE

BIT(16)

Enable socket wait close.

This feature ensures that a socket is not closed until close() is called from the host, which is recommended for use with TCP sockets.

Note

• If it is set socket will not be closed until close() is called from host. It is recommended to enable this bit when using TCP sockets.

• This is always set internally for Si91x chips.

SL_SI91X_EXT_EMB_MQTT_ENABLE#

#define SL_SI91X_EXT_EMB_MQTT_ENABLE

BIT(17)

Enable embedded/internal MQTT.

This feature enables support for embedded MQTT (Message Queuing Telemetry Transport) functionality, allowing the device to use MQTT without external libraries.

Note

• If user wants to use AT command for MQTT, enable this bit in the Opermode Command.

SL_SI91X_EXT_FEAT_HTTP_OTAF_SUPPORT#

#define SL_SI91X_EXT_FEAT_HTTP_OTAF_SUPPORT

BIT(18)

Enable HTTP OTAF support.

This feature enables support for HTTP-based over-the-air firmware (OTAF) updates, allowing the device to download and install firmware updates via HTTP.

Note

• To do firmware upgrade with HTTP this bit should be enabled.

SL_SI91X_EXT_TCP_DYNAMIC_WINDOW_UPDATE_FROM_HOST#

#define SL_SI91X_EXT_TCP_DYNAMIC_WINDOW_UPDATE_FROM_HOST

BIT(19)

Enable to update TCP window from host.

This feature allows the TCP window size to be dynamically updated from the host, providing more control over TCP flow management.

SL_SI91X_EXT_TCP_MAX_RECV_LENGTH#

#define SL_SI91X_EXT_TCP_MAX_RECV_LENGTH

BIT(20)

Enable to update max receive length for TCP.

This feature allows the maximum receive length for TCP connections to be updated, accommodating different application requirements.

SL_SI91X_EXT_TCP_IP_FEAT_SSL_THREE_SOCKETS#

#define SL_SI91X_EXT_TCP_IP_FEAT_SSL_THREE_SOCKETS

BIT(29)

Enable three SSL/TLS sockets.

This feature allows the device to support up to three simultaneous SSL/TLS connections.

Note

• Set tcp_ip_feature_bit_map[31] and ext_tcp_ip_feature_bit_map[29] to open 3 TLS sockets.

• Bits 21-28 are reserved.

SL_SI91X_EXT_TCP_IP_FEAT_SSL_MEMORY_CLOUD#

#define SL_SI91X_EXT_TCP_IP_FEAT_SSL_MEMORY_CLOUD

BIT(30)

Configure additional memory for SSL/TLS connections to cloud servers.

This feature allocates additional memory for SSL/TLS connections, typically required for connections to cloud servers, to avoid 0xD2 error.

Note

• If user connects to a cloud server using two SSL/TLS connections then it is required to set this bit to avoid 0xD2 error.

SL_SI91X_CONFIG_FEAT_EXTENTION_VALID#

#define SL_SI91X_CONFIG_FEAT_EXTENTION_VALID

BIT(31)

Config feature bit map validity.

This feature validates the configuration feature bit map. If this bit is enabled then only, the features present in the configuration feature bitmap can be used.