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CURLOPT_S...GSSAPI_NEC(3)  Library Functions Manual  CURLOPT_S...GSSAPI_NEC(3)

NAME
       CURLOPT_SOCKS5_GSSAPI_NEC - SOCKS proxy GSSAPI negotiation protection

SYNOPSIS
       #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  sec-
       tion  4.3/4.4 it	should be protected, but the NEC reference implementa-
       tion does not.  If enabled, this	option allows the unprotected exchange
       of the protection mode negotiation.

DEFAULT
       ?

PROTOCOLS
       This functionality affects all supported	protocols

EXAMPLE
       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	curl 7.19.4

RETURN VALUE
       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK	(0) means everything was OK, non-zero means an error occurred,
       see libcurl-errors(3).

SEE ALSO
       CURLOPT_PROXY(3), CURLOPT_PROXY_SERVICE_NAME(3)

libcurl				  2025-06-03	     CURLOPT_S...GSSAPI_NEC(3)

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