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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.
- .SH "SEE ALSO"
- .BR CURLOPT_SOCKOPTFUNCTION "(3), " CURLOPT_TCP_NODELAY "(3), "
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