1# Netstack 2 3## Overview 4 5Provides C APIs of the SSL/TLS certificate chain verification module. 6 7**Since**: 11 8## Files 9 10| Name| Description| 11| -- | -- | 12| [net_ssl_c.h](capi-net-ssl-c-h.md) | Defines the C APIs of the SSL/TLS certificate chain verification module.| 13| [net_ssl_c_type.h](capi-net-ssl-c-type-h.md) | Defines data structures for the C APIs of the SSL/TLS certificate chain verification module.| 14| [net_websocket.h](capi-net-websocket-h.md) | Defines the APIs of the WebSocket client module.| 15| [net_websocket_type.h](capi-net-websocket-type-h.md) | Defines data structures for the C APIs of the WebSocket client module.| 16