'\" te
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.TH CURLOPT_INTERFACE 3 "17 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_INTERFACE \- source interface for outgoing traffic
.SH SYNOPSIS
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_INTERFACE, char *interface);
.SH DESCRIPTION
Pass a char * as parameter. This sets the \fIinterface\fP name to use as
outgoing network interface. The name can be an interface name, an IP address,
or a host name.

If the parameter starts with "if!" then it is treated as only as interface
name and no attempt will ever be named to do treat it as an IP address or to
do name resolution on it.  If the parameter starts with \&"host!" it is
treated as either an IP address or a hostname.  Hostnames are resolved
synchronously.  Using the if! format is highly recommended when using the
multi interfaces to avoid allowing the code to block.  If "if!" is specified
but the parameter does not match an existing interface, CURLE_INTERFACE_FAILED
is returned from the libcurl function used to perform the transfer.
.SH DEFAULT
NULL, use whatever the TCP stack finds suitable
.SH PROTOCOLS
All
.SH EXAMPLE
TODO
.SH AVAILABILITY
The "if!" and "host!" syntax was added in 7.24.0.
.SH RETURN VALUE
Returns CURLE_OK on success or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.

.\" Oracle has added the ARC stability level to this manual page
.SH ATTRIBUTES
See
.BR attributes (5)
for descriptions of the following attributes:
.sp
.TS
box;
cbp-1 | cbp-1
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE 
=
Availability	web/curl
=
Stability	Uncommitted
.TE 
.PP
.SH "SEE ALSO"
.BR CURLOPT_SOCKOPTFUNCTION "(3), " CURLOPT_TCP_NODELAY "(3), "


.SH NOTES

.\" Oracle has added source availability information to this manual page
This software was built from source available at https://java.net/projects/solaris-userland.  The original community source was downloaded from  http://curl.haxx.se/download/curl-7.45.0.tar.gz

Further information about this software can be found on the open source community website at http://curl.haxx.se/.