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

# SSLGetPeerDomainNameLength(_:_:)

Determines the length of a previously set peer domain name.

## Declaration

```swift
func SSLGetPeerDomainNameLength(_ context: SSLContext, _ peerNameLen: UnsafeMutablePointer<Int>) -> OSStatus
```

## Parameters

- `context`: An SSL session context reference.
- `peerNameLen`: On return, points to the length of the peer domain name.

## Return Value

Return Value A result code. See Secure Transport Result Codes.

## Discussion

Discussion If you previously called the SSLSetPeerDomainName(_:_:_:) function to specify a fully qualified domain name for the peer certificate, you can use the SSLGetPeerDomainName(_:_:_:) function to retrieve the peer domain name. Before doing so, you must call the SSLGetPeerDomainNameLength(_:_:) function to retrieve the buffer size needed for the domain name.