rdma_resolve_addr
Resolves the destination and optional source addresses.
Syntax
#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);Description
The rdma_resolve_addr function
resolves the destination and optional source addresses from an IP
address to an Remote Direct Memory Access (RDMA) address. If successful,
the specified rdma_cm_id identifier is associated
with a local device.
Notes:
- The rdma_resolve_addr operation is used to map a specified destination IP address to a usable RDMA address. The IP- RDMA address mapping is done by using the local routing table, or by using ARP.
- If the source address is specified, the
rdma_cm_ididentifier is associated with the source address, and the situation is similar to running the rdma_bind_addr operation. If no source address is specified, therdma_cm_ididentifier is not associated with a device, and the identifier gets associated with a source address based on the local routing tables. - The rdma_resolve_addr operation is run from the active side of a connection, before running the rdma_resolve_route and rdma_connect operations.
Parameters
| Item | Description |
|---|---|
| id | Specifies the RDMA identifier. |
| src_addr | Specifies the source address information, and this parameter can be NULL. |
| dst_addr | Specifies the destination address information. |
| timeout_ms | Specifies the time of resolution. |
Return Values
The rdma_resolve_addr function returns 0 on success, or -1 on error. If an error occurs, errno indicates the reason for failure.