Manual Pages  — RDMA_RESOLVE_ADDR

rdma_resolve_addr - Resolve destination and optional source addresses.

SYNOPSIS ARGUMENTS DESCRIPTION RETURN VALUE NOTES INFINIBAND SPECIFIC SEE ALSO

#include <rdma/rdma_cma.h>

int rdma_resolve_addr (struct rdma_cm_id *id, struct sockaddr *src_addr, struct sockaddr *dst_addr, int timeout_ms);

id	RDMA identifier.
src_addr	Source address information. This parameter may be NULL.
dst_addr	Destination address information.
timeout_ms	Time to wait for resolution to complete.

Resolve destination and optional source addresses from IP addresses to an RDMA address. If successful, the specified rdma_cm_id will be bound to a local device.

Returns 0 on success, or -1 on error. If an error occurs, errno will be set to indicate the failure reason.

This call is used to map a given destination IP address to a usable RDMA address. The IP to RDMA address mapping is done using the local routing tables, or via ARP. If a source address is given, the rdma_cm_id is bound to that address, the same as if rdma_bind_addr were called. If no source address is given, and the rdma_cm_id has not yet been bound to a device, then the rdma_cm_id will be bound to a source address based on the local routing tables. After this call, the rdma_cm_id will be bound to an RDMA device. This call is typically made from the active side of a connection before calling rdma_resolve_route and rdma_connect.

This call maps the destination and, if given, source IP addresses to GIDs. In order to perform the mapping, IPoIB must be running on both the local and remote nodes.