CURLOPT_FTP_SSL_CCC.3 2.5 KB

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  23. .TH CURLOPT_FTP_SSL_CCC 3 "19 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
  24. .SH NAME
  25. CURLOPT_FTP_SSL_CCC \- switch off SSL again with FTP after auth
  26. .SH SYNOPSIS
  27. .nf
  28. #include <curl/curl.h>
  29. CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_SSL_CCC,
  30. long how);
  31. .fi
  32. .SH DESCRIPTION
  33. If enabled, this option makes libcurl use CCC (Clear Command Channel). It
  34. shuts down the SSL/TLS layer after authenticating. The rest of the control
  35. channel communication will be unencrypted. This allows NAT routers to follow
  36. the FTP transaction. Pass a long using one of the values below
  37. .IP CURLFTPSSL_CCC_NONE
  38. do not attempt to use CCC.
  39. .IP CURLFTPSSL_CCC_PASSIVE
  40. Do not initiate the shutdown, but wait for the server to do it. Do not send a
  41. reply.
  42. .IP CURLFTPSSL_CCC_ACTIVE
  43. Initiate the shutdown and wait for a reply.
  44. .SH DEFAULT
  45. CURLFTPSSL_CCC_NONE
  46. .SH PROTOCOLS
  47. FTP
  48. .SH EXAMPLE
  49. .nf
  50. CURL *curl = curl_easy_init();
  51. if(curl) {
  52. curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt");
  53. curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_CONTROL);
  54. /* go back to clear-text FTP after authenticating */
  55. curl_easy_setopt(curl, CURLOPT_FTP_SSL_CCC, CURLFTPSSL_CCC_ACTIVE);
  56. ret = curl_easy_perform(curl);
  57. curl_easy_cleanup(curl);
  58. }
  59. .fi
  60. .SH AVAILABILITY
  61. Added in 7.16.1
  62. .SH RETURN VALUE
  63. Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
  64. .SH "SEE ALSO"
  65. .BR CURLOPT_USE_SSL "(3), " CURLOPT_FTPSSLAUTH "(3), "