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        !            23: .TH CURLOPT_LOCALPORT 3 "October 31, 2019" "libcurl 7.70.0" "curl_easy_setopt options"
        !            24: 
        !            25: .SH NAME
        !            26: CURLOPT_LOCALPORT \- set local port number to use for socket
        !            27: .SH SYNOPSIS
        !            28: #include <curl/curl.h>
        !            29: 
        !            30: CURLcode curl_easy_setopt(CURL *handle, CURLOPT_LOCALPORT, long port);
        !            31: .SH DESCRIPTION
        !            32: Pass a long. This sets the local port number of the socket used for the
        !            33: connection. This can be used in combination with \fICURLOPT_INTERFACE(3)\fP
        !            34: and you are recommended to use \fICURLOPT_LOCALPORTRANGE(3)\fP as well when
        !            35: this option is set. Valid port numbers are 1 - 65535.
        !            36: .SH DEFAULT
        !            37: 0, disabled - use whatever the system thinks is fine
        !            38: .SH PROTOCOLS
        !            39: All
        !            40: .SH EXAMPLE
        !            41: .nf
        !            42: CURL *curl = curl_easy_init();
        !            43: if(curl) {
        !            44:   curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/foo.bin");
        !            45:   curl_easy_setopt(curl, CURLOPT_LOCALPORT, 49152L);
        !            46:   /* and try 20 more ports following that */
        !            47:   curl_easy_setopt(curl, CURLOPT_LOCALPORTRANGE, 20L);
        !            48:   ret = curl_easy_perform(curl);
        !            49:   curl_easy_cleanup(curl);
        !            50: }
        !            51: .fi
        !            52: .SH AVAILABILITY
        !            53: Added in 7.15.2
        !            54: .SH RETURN VALUE
        !            55: Returns CURLE_OK
        !            56: .SH "SEE ALSO"
        !            57: .BR CURLOPT_LOCALPORTRANGE "(3), " CURLOPT_INTERFACE "(3), "