---
name: "umad_set_addr"
section: "3"
platform: "linux"
package: "rdma-core"
version: "65.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/umad_set_addr"
---

# umad\_set\_addr(3)

set MAD address fields within umad buffer using host ordering

## NAME

umad\_set\_addr - set MAD address fields within umad buffer using host ordering

## SYNOPSIS

```
#include <infiniband/umad.h>

int umad_set_addr(void *umad, int dlid, int dqp, int sl, int qkey);
```

## DESCRIPTION

**umad\_set\_addr()** sets the MAD address fields within the specified *umad* buffer using the provided host ordered fields. *dlid* is the destination LID. *dqp* is the destination QP (queue pair). *sl* is the SL (service level). *qkey* is the Q\_Key (queue key).

## RETURN VALUE

**umad\_set\_addr()** returns 0 on success, and a negative value on errors. Currently, there are no errors indicated.

## SEE ALSO

[**umad\_set\_addr\_net**(3)](/umad_set_addr_net/3.md)

## AUTHOR

- Hal Rosenstock \<halr@voltaire.com\>