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.

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)

Note

• Bit 2 is reserved TCP bi-dir ack update

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

SL_SI91X_EXT_TCP_IP_WINDOW_DIV#

#define SL_SI91X_EXT_TCP_IP_WINDOW_DIV

BIT(4)

TCP RX window division.

SL_SI91X_EXT_TCP_IP_CERT_BYPASS#

#define SL_SI91X_EXT_TCP_IP_CERT_BYPASS

BIT(5)

SSL server certificate bypass, validation from the host.

SL_SI91X_EXT_TCP_IP_SSL_16K_RECORD#

#define SL_SI91X_EXT_TCP_IP_SSL_16K_RECORD

BIT(6)

SSL 16K record size support.

SL_SI91X_EXT_TCP_IP_DNS_CLIENT_BYPASS#

#define SL_SI91X_EXT_TCP_IP_DNS_CLIENT_BYPASS

BIT(7)

Enable DNS client bypass.

SL_SI91X_EXT_TCP_IP_WINDOW_SCALING#

#define SL_SI91X_EXT_TCP_IP_WINDOW_SCALING

BIT(8)

Enable TCP window scaling feature.

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)

Enables both TCP/IP bypass mode & embedded modes.

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)

Enables Ethernet to WIFI bridge.

SL_SI91X_EXT_DYNAMIC_COEX_MEMORY#

#define SL_SI91X_EXT_DYNAMIC_COEX_MEMORY

BIT(11)

Enables the Dynamic coex memory.

Note

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

SL_SI91X_EXT_TCP_IP_TOTAL_SELECTS#

#define SL_SI91X_EXT_TCP_IP_TOTAL_SELECTS

(total_selects)

Configures the number of selects.

Note

• Bit 12 -15 are used for TOTAL_SELECTS and max value can be 10

SL_SI91X_EXT_TCP_IP_WAIT_FOR_SOCKET_CLOSE#

#define SL_SI91X_EXT_TCP_IP_WAIT_FOR_SOCKET_CLOSE

BIT(16)

To enable socket wait close.

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.

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)

Enables the http otaf support.

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)

Enabled to update TCP window from host.

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.

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.

Note

• Bit 21-28 are reserved

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

SL_SI91X_EXT_TCP_IP_FEAT_SSL_MEMORY_CLOUD#

#define SL_SI91X_EXT_TCP_IP_FEAT_SSL_MEMORY_CLOUD

BIT(30)

To configure additional memory for SSL/TLS connection typically to a cloud server.

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