NAME

       io_uring_prep_send - prepare a send request

SYNOPSIS

       #include <liburing.h>

       void io_uring_prep_send(struct io_uring_sqe *sqe,
                               int sockfd,
                               const void *buf,
                               size_t len,
                               int flags);

       void io_uring_prep_sendto(struct io_uring_sqe *sqe,
                                 int sockfd,
                                 const void *buf,
                                 size_t len,
                                 int flags,
                                 const struct sockaddr *addr,
                                 socklen_t addrlen);

DESCRIPTION

       The  io_uring_prep_send(3)  function  prepares a send request. The submission queue entry sqe is setup to
       use the file descriptor sockfd to start sending the data from buf of size len  bytes  and  with  modifier
       flags flags.

       Note  that  using  IOSQE_IO_LINK  with this request type requires the setting of MSG_WAITALL in the flags
       argument, as a short send isn't a considered an error condition without that being set.

       This function prepares an async send(2) request. See that man page for details.

       The io_uring_prep_sendto(3) function prepares a sendto request. The submission queue entry sqe  is  setup
       to  use the file descriptor sockfd to start sending the data from buf of size len bytes and with modifier
       flags flags.  The destination address is specified by addr and addrlen and must be a  valid  address  for
       the socket type.

       This function prepares an async sendto(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.

SEE ALSO

       io_uring_get_sqe(3), io_uring_submit(3), send(2) sendto(2)