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e3fe020089
Remove the PROTOCOLS section from the source files completely and instead generate them based on the header data in the curldown files. It also generates TLS backend information for options marked for TLS as protocol. Closes #13175
62 lines
1.2 KiB
Markdown
62 lines
1.2 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_LOCALPORT
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Section: 3
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Source: libcurl
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See-also:
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- CURLINFO_LOCAL_PORT (3)
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- CURLOPT_INTERFACE (3)
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- CURLOPT_LOCALPORTRANGE (3)
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Protocol:
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- All
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---
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# NAME
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CURLOPT_LOCALPORT - local port number to use for socket
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_LOCALPORT, long port);
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~~~
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# DESCRIPTION
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Pass a long. This sets the local port number of the socket used for the
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connection. This can be used in combination with CURLOPT_INTERFACE(3)
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and you are recommended to use CURLOPT_LOCALPORTRANGE(3) as well when
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this option is set. Valid port numbers are 1 - 65535.
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# DEFAULT
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0, disabled - use whatever the system thinks is fine
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
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curl_easy_setopt(curl, CURLOPT_LOCALPORT, 49152L);
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/* and try 20 more ports following that */
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curl_easy_setopt(curl, CURLOPT_LOCALPORTRANGE, 20L);
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res = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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}
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}
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~~~
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# AVAILABILITY
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Added in 7.15.2
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# RETURN VALUE
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Returns CURLE_OK
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