Section: curl_easy_setopt options (3)
Updated: June 25, 2020
CURLOPT_LOGIN_OPTIONS - set login options
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_LOGIN_OPTIONS, char *options);
Pass a char * as parameter, which should be pointing to the null-terminated
string to use for the transfer.
For more information about the login options please see RFC2384, RFC5092 and
IETF draft draft-earhart-url-smtp-00.txt
CURLOPT_LOGIN_OPTIONS(3) can be used to set protocol specific login
options, such as the preferred authentication mechanism via "AUTH=NTLM" or
"AUTH=*", and should be used in conjunction with the CURLOPT_USERNAME(3)
The application does not have to keep the string around after setting this
Only IMAP, POP3 and SMTP support login options.
CURL *curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, "smtp://example.com/");
curl_easy_setopt(curl, CURLOPT_LOGIN_OPTIONS, "AUTH=*");
ret = curl_easy_perform(curl);
Added in 7.34.0
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.