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                     23: .TH CURLINFO_PROTOCOL 3 "April 14, 2020" "libcurl 7.70.0" "curl_easy_getinfo options"
                     24: 
                     25: .SH NAME
                     26: CURLINFO_PROTOCOL \- get the protocol used in the connection
                     27: .SH SYNOPSIS
                     28: #include <curl/curl.h>
                     29: 
                     30: CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PROTOCOL, long *p);
                     31: .SH DESCRIPTION
                     32: Pass a pointer to a long to receive the version used in the last http
                     33: connection.  The returned value will be exactly one of the CURLPROTO_* values:
                     34: 
                     35: .nf
                     36: CURLPROTO_DICT, CURLPROTO_FILE, CURLPROTO_FTP, CURLPROTO_FTPS,
                     37: CURLPROTO_GOPHER, CURLPROTO_HTTP, CURLPROTO_HTTPS, CURLPROTO_IMAP,
                     38: CURLPROTO_IMAPS, CURLPROTO_LDAP, CURLPROTO_LDAPS, CURLPROTO_POP3,
                     39: CURLPROTO_POP3S, CURLPROTO_RTMP, CURLPROTO_RTMPE, CURLPROTO_RTMPS,
                     40: CURLPROTO_RTMPT, CURLPROTO_RTMPTE, CURLPROTO_RTMPTS, CURLPROTO_RTSP,
                     41: CURLPROTO_SCP, CURLPROTO_SFTP, CURLPROTO_SMB, CURLPROTO_SMBS, CURLPROTO_SMTP,
                     42: CURLPROTO_SMTPS, CURLPROTO_TELNET, CURLPROTO_TFTP, CURLPROTO_MQTT
                     43: .SH PROTOCOLS
                     44: All
                     45: .SH EXAMPLE
                     46: .nf
                     47: CURL *curl = curl_easy_init();
                     48: if(curl) {
                     49:   CURLcode res;
                     50:   curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
                     51:   res = curl_easy_perform(curl);
                     52:   if(res == CURLE_OK) {
                     53:     long protocol;
                     54:     curl_easy_getinfo(curl, CURLINFO_PROTOCOL, &protocol);
                     55:   }
                     56:   curl_easy_cleanup(curl);
                     57: }
                     58: .fi
                     59: .SH AVAILABILITY
                     60: Added in 7.52.0
                     61: .SH RETURN VALUE
                     62: Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
                     63: .SH "SEE ALSO"
                     64: .BR CURLINFO_RESPONSE_CODE "(3), "
                     65: .BR curl_easy_getinfo "(3), " curl_easy_setopt "(3), "