curl-w32/docs/libcurl/opts/CURLOPT_SOCKS5_GSSAPI_NEC.md

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---
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
SPDX-License-Identifier: curl
Title: CURLOPT_SOCKS5_GSSAPI_NEC
Section: 3
Source: libcurl
See-also:
- CURLOPT_PROXY (3)
- CURLOPT_SOCKS5_GSSAPI_SERVICE (3)
---
# NAME
CURLOPT_SOCKS5_GSSAPI_NEC - SOCKS proxy GSSAPI negotiation protection
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SOCKS5_GSSAPI_NEC, long nec);
~~~
# DESCRIPTION
Pass a long set to 1 to enable or 0 to disable. As part of the GSSAPI
negotiation a protection mode is negotiated. The RFC 1961 says in section
4.3/4.4 it should be protected, but the NEC reference implementation does not.
If enabled, this option allows the unprotected exchange of the protection mode
negotiation.
# DEFAULT
?
# PROTOCOLS
Most
# EXAMPLE
~~~c
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
curl_easy_setopt(curl, CURLOPT_PROXY, "socks5://proxy");
curl_easy_setopt(curl, CURLOPT_SOCKS5_GSSAPI_NEC, 1L);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
~~~
# AVAILABILITY
Added in 7.19.4
# RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.