NAME

       io_uring_prep_connect - prepare a connect request

SYNOPSIS

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

       void io_uring_prep_connect(struct io_uring_sqe *sqe,
                                  int sockfd,
                                  const struct sockaddr *addr,
                                  socklen_t addrlen);

DESCRIPTION

       The io_uring_prep_connect(3) function prepares a connect request. The submission queue entry sqe is setup
       to  use the file descriptor sockfd to start connecting to the destination described by the socket address
       at addr and of structure length addrlen.

       This function prepares an async connect(2) request. See that man page 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.

NOTES

       As  with  any  request that passes in data in a struct, that data must remain valid until the request has
       been successfully submitted. It need  not  remain  valid  until  completion.  Once  a  request  has  been
       submitted,  the  in-kernel  state  is  stable.  Very early kernels (5.4 and earlier) required state to be
       stable until the completion  occurred.  Applications  can  test  for  this  behavior  by  inspecting  the
       IORING_FEAT_SUBMIT_STABLE flag passed back from io_uring_queue_init_params(3).

SEE ALSO

       io_uring_get_sqe(3), io_uring_submit(3), connect(2)

liburing-2.2                                     March 13, 2022                         io_uring_prep_connect(3)