Annotation of embedaddon/curl/docs/libcurl/opts/CURLOPT_DNS_SERVERS.3, revision 1.1.1.1
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23: .TH CURLOPT_DNS_SERVERS 3 "May 31, 2017" "libcurl 7.70.0" "curl_easy_setopt options"
24:
25: .SH NAME
26: CURLOPT_DNS_SERVERS \- set preferred DNS servers
27: .SH SYNOPSIS
28: #include <curl/curl.h>
29:
30: CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_SERVERS, char *servers);
31: .SH DESCRIPTION
32: Pass a char * that is the list of DNS servers to be used instead of the system
33: default. The format of the dns servers option is:
34:
35: host[:port][,host[:port]]...
36:
37: For example:
38:
39: 192.168.1.100,192.168.1.101,3.4.5.6
40:
41: The application does not have to keep the string around after setting this
42: option.
43: .SH DEFAULT
44: NULL - use system default
45: .SH PROTOCOLS
46: All
47: .SH EXAMPLE
48: .nf
49: CURL *curl = curl_easy_init();
50: if(curl) {
51: curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/foo.bin");
52: curl_easy_setopt(curl, CURLOPT_DNS_SERVERS, "192.168.1.100:53,192.168.1.101");
53: ret = curl_easy_perform(curl);
54: curl_easy_cleanup(curl);
55: }
56: .fi
57: .SH AVAILABILITY
58: This option requires that libcurl was built with a resolver backend that
59: supports this operation. The c-ares backend is the only such one.
60:
61: Added in 7.24.0
62: .SH RETURN VALUE
63: Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not,
64: CURLE_NOT_BUILT_IN if support was disabled at compile-time,
65: CURLE_BAD_FUNCTION_ARGUMENT when given an invalid server list, or
66: CURLE_OUT_OF_MEMORY if there was insufficient heap space.
67: .SH "SEE ALSO"
68: .BR CURLOPT_DNS_LOCAL_IP4 "(3), " CURLOPT_DNS_CACHE_TIMEOUT "(3), "
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