---
title: mbuf_set_traffic_class
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.4+]
path: kernel/1535642-mbuf_set_traffic_class
---

# mbuf_set_traffic_class

## Declaration

```occ
errno_t mbuf_set_traffic_class(mbuf_t mbuf, mbuf_traffic_class_t tc);
```

## Parameters

- `mbuf`: The mbuf to set the traffic class on. @tc The traffic class

## Return Value

Return Value 0 on success, EINVAL if bad parameter is passed

## Discussion

Discussion Set the traffic class of an mbuf packet.