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23 .TH CURLOPT_FTPPORT 3 "May 30, 2017" "libcurl 7.59.0" "curl_easy_setopt options"
26 CURLOPT_FTPPORT \- make FTP transfer active
28 #include <curl/curl.h>
30 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTPPORT, char *spec);
32 Pass a pointer to a zero terminated string as parameter. It specifies that the
33 FTP transfer will be made actively and the given string will be used to get
34 the IP address to use for the FTP PORT instruction.
36 The PORT instruction tells the remote server to connect to our specified IP
37 address. The string may be a plain IP address, a host name, a network
38 interface name (under Unix) or just a '-' symbol to let the library use your
39 system's default IP address. Default FTP operations are passive, and thus
42 The address can be followed by a ':' to specify a port, optionally followed by
43 a '-' to specify a port range. If the port specified is 0, the operating
44 system will pick a free port. If a range is provided and all ports in the
45 range are not available, libcurl will report CURLE_FTP_PORT_FAILED for the
46 handle. Invalid port/range settings are ignored. IPv6 addresses followed by
47 a port or portrange have to be in brackets. IPv6 addresses without port/range
48 specifier can be in brackets.
50 Examples with specified ports:
54 192.168.1.2:32000-33000
59 You disable PORT again and go back to using the passive version by setting
62 The application does not have to keep the string around after setting this
70 CURL *curl = curl_easy_init();
72 curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/old-server/file.txt");
73 curl_easy_setopt(curl, CURLOPT_FTPPORT, "-");
74 ret = curl_easy_perform(curl);
75 curl_easy_cleanup(curl);
79 Port range support was added in 7.19.5
81 Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
82 CURLE_OUT_OF_MEMORY if there was insufficient heap space.
84 .BR CURLOPT_FTP_USE_EPRT "(3), " CURLOPT_FTP_USE_EPSV "(3), "