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CURLOPT_SOCKS5_GSSAPI_NEC explained

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 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

CURL *curl = curl_easy_init();
if(curl) {
  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);
  ret = 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.