---
title: "sec_protocol_options_add_tls_application_protocol(_:_:)"
framework: security
role: symbol
role_heading: Function
path: "security/sec_protocol_options_add_tls_application_protocol(_:_:)"
---

# sec_protocol_options_add_tls_application_protocol(_:_:)

## Declaration

```swift
func sec_protocol_options_add_tls_application_protocol(_ options: sec_protocol_options_t, _ application_protocol: UnsafePointer<CChar>)
```

## Parameters

- `options`: A sec_protocol_options_t instance.
- `application_protocol`: A NULL-terminated string defining the application protocol.

## Discussion

Discussion Add an application protocol supported by clients of this protocol instance.