# PR_ConvertIPv4AddrToIPv6

Converts an IPv4 address into an (IPv4-mapped) IPv6 address.

## Syntax

```{code}
#include <prnetdb.h>

void PR_ConvertIPv4AddrToIPv6(
  PRUint32 v4addr,
  PRIPv6Addr *v6addr
);
```

## Parameters

The function has the following parameters:

`v4addr`

: The IPv4 address to convert into an IPv4-mapped IPv6 address. This
  must be specified in network byte order.

`v6addr`

: A pointer to a buffer, allocated by the caller, that is filled in
  with the IPv6 address on return.