io_uring_prep_cmd_getsockname(3)

NAME
io_uring_prep_cmd_getsockname - prepare a getsockname or getpeername request

SYNOPSIS
#include <sys/socket.h>
#include <liburing.h>

void io_uring_prep_cmd_getsockname(struct io_uring_sqe *sqe,
                                   int fd,
                                   struct sockaddr *sockaddr,
                                   socklen_t *sockaddr_len,
                                   int peer);

DESCRIPTION
The io_uring_prep_cmd_getsockname(3) function prepares a getsockname/getpeername request. The submission queue entry sqe is setup to fetch the locally bound address or peer address of the socket file descriptor pointed by sockfd. The parameter sockaddr points to a region of size sockaddr_len where the output is written. sockaddr_len is modified by the kernel on return to indicate how many bytes were written. The output address is the locally bound address if peer is set to 0 or the peer address if peer is set to 1. This function prepares an async getsockname(2) or getpeername(2) request. See those man pages for details.

RETURN VALUE
None

ERRORS
The CQE res field will contain the result of the operation. See the related man page for details on possible values. Note that where synchronous system calls will return -1 on failure and set errno to the actual error value, io_uring never uses errno. Instead it returns the negated errno directly in the CQE res field. Differently from the equivalent system calls, if the user attempts to use this operation on a non-socket file descriptor, the CQE error result is ENOTSUP instead of ENOSOCK.

SEE ALSO
io_uring_get_sqe(3), io_uring_submit(3), getsockname(2), getpeername(2)