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
69 lines
1.3 KiB
Markdown
69 lines
1.3 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_RESOLVER_START_DATA
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_PREREQFUNCTION (3)
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- CURLOPT_RESOLVER_START_FUNCTION (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_RESOLVER_START_DATA - pointer passed to the resolver start callback
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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_RESOLVER_START_DATA,
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void *pointer);
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~~~
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# DESCRIPTION
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Pass a *pointer* is be untouched by libcurl and passed as the third
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argument in the resolver start callback set with
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CURLOPT_RESOLVER_START_FUNCTION(3).
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# DEFAULT
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NULL
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# EXAMPLE
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~~~c
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static int resolver_start_cb(void *resolver_state, void *reserved,
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void *userdata)
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{
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(void)reserved;
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printf("Received resolver_state=%p userdata=%p\n",
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resolver_state, userdata);
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return 0;
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}
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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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curl_easy_setopt(curl, CURLOPT_RESOLVER_START_FUNCTION, resolver_start_cb);
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curl_easy_setopt(curl, CURLOPT_RESOLVER_START_DATA, curl);
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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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 7.59.0
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# RETURN VALUE
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Returns CURLE_OK
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