[#Sock-Send]
= xref:Sock.adoc[Sock]::Send
:relfileprefix: ../
:mrdocs:

send(2) wrapper. Equivalent to `send(m_socket, data, len, flags);`. Code that uses this wrapper can be unit tested if this method is overridden by a mock Sock implementation.

== Synopsis

Declared in `<util/sock.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[nodiscard]]
virtual
ssize_t
Send(
    void const* data,
    size_t len,
    int flags) const;
----

== Return Value

Number of bytes sent, or ‐1 on error (with errno set).

[NOTE]
====
The return value https://en.cppreference.com/cpp/language/attributes/nodiscard[should not be discarded^].
====
== Parameters

[cols="1,4"]
|===
| Name| Description
| *data*
| Pointer to the bytes to send.
| *len*
| Number of bytes to send.
| *flags*
| Flags passed through to `send(2)`.
|===


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