---
name: "IP_ADD_SOURCE_MEMBERSHIP"
section: "2const"
platform: "linux"
package: "man-pages"
version: "6.19-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/IP_ADD_SOURCE_MEMBERSHIP"
---

# IP\_ADD\_SOURCE\_MEMBERSHIP(2const)

join a multicast group and allow receiving data only from a specified source

## NAME

IP\_ADD\_SOURCE\_MEMBERSHIP - join a multicast group and allow receiving data only from a specified source

## LIBRARY

Standard C library (*libc*, *-lc*)

## SYNOPSIS

```
#include <netinet/in.h>  /* Definition of IP* constants */
#include <sys/socket.h>
```

**int setsockopt(int** *sockfd***, IPPROTO\_IP, IP\_ADD\_SOURCE\_MEMBERSHIP,**                **const struct ip\_mreq\_source \****val***,**                **sizeof(struct ip\_mreq\_source));**

## DESCRIPTION

Join a multicast group and allow receiving data only from a specified source.

This option can be used multiple times to allow receiving data from more than one source.

## ERRORS

See [**IPPROTO\_IP**(2const)](/IPPROTO_IP/2const.md). See [**setsockopt**(2)](/setsockopt/2.md). See [**ip**(7)](/ip/7.md).

## HISTORY

Linux 2.4.22, Linux 2.5.68.

## SEE ALSO

[**IPPROTO\_IP**(2const)](/IPPROTO_IP/2const.md), [**IP\_ADD\_MEMBERSHIP**(2const)](/IP_ADD_MEMBERSHIP/2const.md), [**ip\_mreq\_source**(2type)](/ip_mreq_source/2type.md), [**setsockopt**(2)](/setsockopt/2.md), [**ip**(7)](/ip/7.md)