Error Set SendToError [src]

(For UNIX domain sockets, which are identified by pathname) Write permission is denied on the destination socket file, or search permission is denied for one of the directories the path prefix. (See path_resolution(7).) (For UDP sockets) An attempt was made to send to a network/broadcast address as though it was a unicast address.

The passed address didn't have the correct address family in its sa_family field.

The local end has been shut down on a connection oriented socket. In this case, the process will also receive a SIGPIPE unless MSG.NOSIGNAL is set.

The destination address is not listening.

Connection reset by peer.

Another Fast Open is already in progress.

Returned when socket is AF.UNIX and the given path does not point to an existing file.

The socket type requires that message be sent atomically, and the size of the message to be sent made this impossible. The message is not transmitted.

Returned when socket is AF.UNIX and the given path length exceeds max_path_bytes bytes.

The local network interface used to reach the destination is down.

Network is unreachable.

The socket is not connected (connection-oriented sockets only).

Returned when socket is AF.UNIX and the given path has a symlink loop.

The output queue for a network interface was full. This generally indicates that the interface has stopped sending, but may be caused by transient congestion. (Normally, this does not occur in Linux. Packets are just silently dropped when a device queue overflows.) This is also caused when there is not enough kernel memory available.

The Operating System returned an undocumented error code.

This error is in theory not possible, but it would be better to handle this error than to invoke undefined behavior.

When this error code is observed, it usually means the Zig Standard Library needs a small patch to add the error code to the error set for the respective function.

The destination address is not reachable by the bound address.

The socket is marked nonblocking and the requested operation would block, and there is no global event loop configured. It's also possible to get this error under the following condition: (Internet domain datagram sockets) The socket referred to by sockfd had not previously been bound to an address and, upon attempting to bind it to an ephemeral port, it was determined that all port numbers in the ephemeral port range are currently in use. See the discussion of /proc/sys/net/ipv4/ip_local_port_range in ip(7).