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rdma_leave_multicast(3) [centos man page]

RDMA_LEAVE_MULTICAST(3) 				   Librdmacm Programmer's Manual				   RDMA_LEAVE_MULTICAST(3)

NAME
rdma_leave_multicast - Leaves a multicast group. SYNOPSIS
#include <rdma/rdma_cma.h> int rdma_leave_multicast (struct rdma_cm_id *id, struct sockaddr *addr); ARGUMENTS
id Communication identifier associated with the request. addr Multicast address identifying the group to leave. DESCRIPTION
Leaves a multicast group and detaches an associated QP from the group. RETURN VALUE
Returns 0 on success, or -1 on error. If an error occurs, errno will be set to indicate the failure reason. NOTES
Calling this function before a group has been fully joined results in canceling the join operation. Users should be aware that messages received from the multicast group may stilled be queued for completion processing immediately after leaving a multicast group. Destroying an rdma_cm_id will automatically leave all multicast groups. SEE ALSO
rdma_join_multicast(3), rdma_destroy_qp(3) librdmacm 2007-05-15 RDMA_LEAVE_MULTICAST(3)

Check Out this Related Man Page

IBV_ATTACH_MCAST(3)					  Libibverbs Programmer's Manual				       IBV_ATTACH_MCAST(3)

NAME
ibv_attach_mcast, ibv_detach_mcast - attach and detach a queue pair (QPs) to/from a multicast group SYNOPSIS
#include <infiniband/verbs.h> int ibv_attach_mcast(struct ibv_qp *qp, const union ibv_gid *gid, uint16_t lid); int ibv_detach_mcast(struct ibv_qp *qp, const union ibv_gid *gid, uint16_t lid); DESCRIPTION
ibv_attach_mcast() attaches the QP qp to the multicast group having MGID gid and MLID lid. ibv_detach_mcast() detaches the QP qp to the multicast group having MGID gid and MLID lid. RETURN VALUE
ibv_attach_mcast() and ibv_detach_mcast() returns 0 on success, or the value of errno on failure (which indicates the failure reason). NOTES
Only QPs of Transport Service Type IBV_QPT_UD may be attached to multicast groups. If a QP is attached to the same multicast group multiple times, the QP will still receive a single copy of a multicast message. In order to receive multicast messages, a join request for the multicast group must be sent to the subnet administrator (SA), so that the fabric's multicast routing is configured to deliver messages to the local port. SEE ALSO
ibv_create_qp(3) AUTHORS
Dotan Barak <dotanba@gmail.com> libibverbs 2006-10-31 IBV_ATTACH_MCAST(3)
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