io_uring_prep_send(3) liburing Manual io_uring_prep_send(3)
io_uring_prep_send - prepare a send request
#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);
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.
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.
io_uring_get_sqe(3), io_uring_submit(3), send(2) sendto(2)
This page is part of the liburing (A library for io_uring) project. Information about the project can be found at ⟨https://github.com/axboe/liburing⟩. If you have a bug report for this manual page, send it to firstname.lastname@example.org. This page was obtained from the project's upstream Git repository ⟨https://github.com/axboe/liburing⟩ on 2023-06-23. (At that time, the date of the most recent commit that was found in the repository was 2023-06-22.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to email@example.com liburing-2.2 March 12, 2022 io_uring_prep_send(3)
Pages that refer to this page: io_uring_prep_send(3), io_uring_prep_send_set_addr(3), io_uring_prep_sendto(3), io_uring_prep_send_zc(3), io_uring_prep_send_zc_fixed(3)