curlopt_resolve(3) [mojave man page]

CURLOPT_RESOLVE(3)					     curl_easy_setopt options						CURLOPT_RESOLVE(3)

NAME

       CURLOPT_RESOLVE - provide custom host name to IP address resolves

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RESOLVE,
				 struct curl_slist *hosts);

DESCRIPTION

       Pass  a pointer to a linked list of strings with host name resolve information to use for requests with this handle. The linked list should
       be  a  fully  valid  list  of  struct  curl_slist  structs  properly  filled  in.  Use  curl_slist_append(3)  to  create   the	list   and
       curl_slist_free_all(3) to clean up an entire list.

       Each  single  name  resolve string should be written using the format HOST:PORT:ADDRESS where HOST is the name libcurl will try to resolve,
       PORT is the port number of the service where libcurl wants to connect to the HOST and ADDRESS is the numerical IP address.  If  libcurl	is
       built to support IPv6, ADDRESS can of course be either IPv4 or IPv6 style addressing.

       This option effectively pre-populates the DNS cache with entries for the host+port pair so redirects and everything that operations against
       the HOST+PORT will instead use your provided ADDRESS. Addresses set with CURLOPT_RESOLVE(3) will not time-out from the DNS cache like ordi-
       nary entries.

       The provided ADDRESS set by this option will be used even if CURLOPT_IPRESOLVE(3) is set to make libcurl use another IP version.

       Remove names from the DNS cache again, to stop providing these fake resolves, by including a string in the linked list that uses the format
       "-HOST:PORT". The host name must be prefixed with a dash, and the host name and port number must exactly match what was already added  pre-
       viously.

DEFAULT

       NULL

PROTOCOLS

       All

EXAMPLE

       CURL *curl;
       struct curl_slist *host = NULL;
       host = curl_slist_append(NULL, "example.com:80:127.0.0.1");

       curl = curl_easy_init();
       if(curl) {
	 curl_easy_setopt(curl, CURLOPT_RESOLVE, host);
	 curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");

	 curl_easy_perform(curl);

	 /* always cleanup */
	 curl_easy_cleanup(curl);
       }

       curl_slist_free_all(host);

AVAILABILITY

       Added in 7.21.3. Removal support added in 7.42.0.

RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       CURLOPT_IPRESOLVE(3), CURLOPT_DNS_CACHE_TIMEOUT(3), CURLOPT_CONNECT_TO(3),

libcurl 7.54.0							   May 17, 2016 						CURLOPT_RESOLVE(3)

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CURLOPT_FTPPORT(3)					     curl_easy_setopt options						CURLOPT_FTPPORT(3)

NAME

       CURLOPT_FTPPORT - make FTP transfer active

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTPPORT, char *spec);

DESCRIPTION

       Pass a pointer to a zero terminated string as parameter. It specifies that the FTP transfer will be made actively and the given string will
       be used to get the IP address to use for the FTP PORT instruction.

       The PORT instruction tells the remote server to connect to our specified IP address. The string may be a plain IP address, a host  name,  a
       network	interface  name  (under Unix) or just a '-' symbol to let the library use your system's default IP address. Default FTP operations
       are passive, and thus won't use PORT.

       The address can be followed by a ':' to specify a port, optionally followed by a '-' to specify a port range.  If the port specified is	0,
       the  operating  system  will  pick  a  free port.  If a range is provided and all ports in the range are not available, libcurl will report
       CURLE_FTP_PORT_FAILED for the handle.  Invalid port/range settings are ignored.	IPv6 addresses followed by a port or portrange have to	be
       in brackets.  IPv6 addresses without port/range specifier can be in brackets.

       Examples with specified ports:

	 eth0:0
	 192.168.1.2:32000-33000
	 curl.se:32123
	 [::1]:1234-4567

       You disable PORT again and go back to using the passive version by setting this option to NULL.

       The application does not have to keep the string around after setting this option.

DEFAULT

       NULL

PROTOCOLS

       FTP

EXAMPLE

       TODO

AVAILABILITY

       Port range support was added in 7.19.5

RETURN VALUE

       Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.

SEE ALSO

       CURLOPT_FTP_USE_EPRT(3), CURLOPT_FTP_USE_EPSV(3),

libcurl 7.54.0							 December 21, 2016						CURLOPT_FTPPORT(3)

Linux and UNIX Man Pages

curlopt_resolve(3) [mojave man page]

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