---
name: "TSHttpTxnClientPacketTosSet"
section: "3ts"
platform: "linux"
package: "trafficserver-dev"
version: "9.2.5+ds-0+deb12u4"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/TSHttpTxnClientPacketTosSet"
---

# TSHttpTxnClientPacketTosSet(3ts)

TSHttpTxnClientPacketTosSet API function

## NAME

TSHttpTxnClientPacketTosSet - TSHttpTxnClientPacketTosSet API function

## SYNOPSIS

```
#include <ts/ts.h>
```

- ***TSReturnCode* TSHttpTxnClientPacketTosSet(*TSHttpTxn* txnp, int tos)**

  ## DESCRIPTION

Change packet *tos* for the client side connection.

**IMPORTANT:**

Changes take effect immediately

**NOTE:**

TOS is deprecated and replaced by DSCP. This is still used to set DSCP, however the first 2 bits of this value will be ignored as they now belong to the ECN field.

## SEE ALSO

## COPYRIGHT

2026, dev@trafficserver.apache.org