Annotation of embedaddon/curl/docs/libcurl/opts/CURLOPT_LOCALPORTRANGE.3, revision 1.1.1.1
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23: .TH CURLOPT_LOCALPORTRANGE 3 "October 31, 2019" "libcurl 7.70.0" "curl_easy_setopt options"
24:
25: .SH NAME
26: CURLOPT_LOCALPORTRANGE \- number of additional local ports to try
27: .SH SYNOPSIS
28: #include <curl/curl.h>
29:
30: CURLcode curl_easy_setopt(CURL *handle, CURLOPT_LOCALPORTRANGE,
31: long range);
32: .SH DESCRIPTION
33: Pass a long. The \fIrange\fP argument is the number of attempts libcurl will
34: make to find a working local port number. It starts with the given
35: \fICURLOPT_LOCALPORT(3)\fP and adds one to the number for each retry. Setting
36: this option to 1 or below will make libcurl do only one try for the exact port
37: number. Port numbers by nature are scarce resources that will be busy at times
38: so setting this value to something too low might cause unnecessary connection
39: setup failures.
40: .SH DEFAULT
41: 1
42: .SH PROTOCOLS
43: All
44: .SH EXAMPLE
45: .nf
46: CURL *curl = curl_easy_init();
47: if(curl) {
48: curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/foo.bin");
49: curl_easy_setopt(curl, CURLOPT_LOCALPORT, 49152L);
50: /* and try 20 more ports following that */
51: curl_easy_setopt(curl, CURLOPT_LOCALPORTRANGE, 20L);
52: ret = curl_easy_perform(curl);
53: curl_easy_cleanup(curl);
54: }
55: .fi
56: .SH AVAILABILITY
57: Added in 7.15.2
58: .SH RETURN VALUE
59: Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
60: .SH "SEE ALSO"
61: .BR CURLOPT_LOCALPORT "(3), " CURLOPT_INTERFACE "(3), "
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