setsourcefilter

Table of Contents >> IPv6 Programmer's Reference >> MLDv2

#include <trsocket.h>

int setsourcefilter	(
	int sd,
	ttUser32Bit ifindex,
	struct sockaddr TM_FAR * group,
	unsigned int grouplen,
	ttUser32Bit fmode,
	unsigned int numsrc,
	struct sockaddr_storage TM_FAR * slist
	);

Function Description

This function API allows the user to set a source address filter list in either exclude mode or include mode for a given socket, interface, and multicast source address. Calling setsourcefilter() in include mode with numsrc set to zero is the same as dropping the multicast membership. This function supports IPv4 (IGMPv3) and IPv6 (MLDv2).

Parameters

• sd

  The socket descriptor.

• ifindex

  Index of the corresponding configured interface as returned by if_nametoindex(). Note that a zero index is valid if the user has either designated a default multicast interface for the socket via the IP_MULTICAST_IF or IPV6_MULTICAST_IF socket options, or designated a default multicast interface for the system via tfSetMcastInterface() or tf6SetMcastInterface().

• group

  Destination multicast group address (IPv4 or IPv6).

• grouplen

  The size of the structure pointed to by group.

• fmode

  Filter mode. Either MCAST_INCLUDE or MCAST_EXCLUDE.

• numsrc

  Number of source addresses in the slist array.

• slist

  Points to an array of IPv4 or IPv6 source addresses to include or exclude, based on the value of the fmode argument. The address family (AF_INET or AF_INET6) of all source addresses must match that of group.

Return Values

• TM_ENOERROR

  Success

• TM_SOCKET_ERROR

  Failure

Note:

TM_SOCKET_ERROR means that this socket call has failed and the errorCode has been set on the socket itself. To retrieve the socket error the user must call tfGetSocketError(socketDescriptor).

Possible socket errors

• TM_EBADF

  The socket descriptor is invalid.

• TM_EINVAL

  The operation is not legal on the group. For example fmode contains a value other than MCAST_INCLUDE or MCAST_EXCLUDE.

• TM_EPROTOTYPE

  The socket is not of type SOCK_DGRAM or SOCK_RAW.

• TM_EADDRNOTAVAIL

  Address is invalid. Here are a few examples:

• No interface at the specified index.
• A source address is invalid.
• Trying to add a source on a local multicast group.
• The group address is not multicast.
• Trying to drop an un-joined multicast group (by setting numsrc to 0 in include mode for an un-joined multicast group).

• TM_ENOBUFS

  No memory for operation, most probably because the maximum number of filters has been reached.

• TM_EAFNOSUPPORT

  Address family mismatch or is not valid or is unsupported (IGMPv3 or MLDv2 must be present, depending on the address family).

Table of Contents >> IPv6 Programmer's Reference >> MLDv2