Loading docs/TODO +121 −101 Original line number Diff line number Diff line Loading @@ -65,61 +65,66 @@ 10. LDAP 10.1 SASL based authentication mechanisms 11. New protocols 11.1 RSYNC 12. SSL 12.1 Disable specific versions 12.2 Provide mutex locking API 12.3 Evaluate SSL patches 12.4 Cache OpenSSL contexts 12.5 Export session ids 12.6 Provide callback for cert verification 12.7 improve configure --with-ssl 12.8 Support DANE 13. GnuTLS 13.1 SSL engine stuff 13.2 check connection 14. SASL 14.1 Other authentication mechanisms 14.2 Add QOP support to GSSAPI authentication 15. Client 15.1 sync 15.2 glob posts 15.3 prevent file overwriting 15.4 simultaneous parallel transfers 15.5 provide formpost headers 15.6 warning when setting an option 16. Build 16.1 roffit 17. Test suite 17.1 SSL tunnel 17.2 nicer lacking perl message 17.3 more protocols supported 17.4 more platforms supported 17.5 Add support for concurrent connections 18. Next SONAME bump 18.1 http-style HEAD output for FTP 18.2 combine error codes 18.3 extend CURLOPT_SOCKOPTFUNCTION prototype 19. Next major release 19.1 cleanup return codes 19.2 remove obsolete defines 19.3 size_t 19.4 remove several functions 19.5 remove CURLOPT_FAILONERROR 19.6 remove CURLOPT_DNS_USE_GLOBAL_CACHE 19.7 remove progress meter from libcurl 19.8 remove 'curl_httppost' from public 19.9 have form functions use CURL handle argument 19.10 Add CURLOPT_MAIL_CLIENT option 11. SMB 11.1 File listing support 11.2 Honor file timestamps 11.3 Use NTLMv2 12. New protocols 12.1 RSYNC 13. SSL 13.1 Disable specific versions 13.2 Provide mutex locking API 13.3 Evaluate SSL patches 13.4 Cache OpenSSL contexts 13.5 Export session ids 13.6 Provide callback for cert verification 13.7 improve configure --with-ssl 13.8 Support DANE 14. GnuTLS 14.1 SSL engine stuff 14.2 check connection 15. SASL 15.1 Other authentication mechanisms 15.2 Add QOP support to GSSAPI authentication 16. Client 16.1 sync 16.2 glob posts 16.3 prevent file overwriting 16.4 simultaneous parallel transfers 16.5 provide formpost headers 16.6 warning when setting an option 17. Build 17.1 roffit 18. Test suite 18.1 SSL tunnel 18.2 nicer lacking perl message 18.3 more protocols supported 18.4 more platforms supported 18.5 Add support for concurrent connections 19. Next SONAME bump 19.1 http-style HEAD output for FTP 19.2 combine error codes 19.3 extend CURLOPT_SOCKOPTFUNCTION prototype 20. Next major release 20.1 cleanup return codes 20.2 remove obsolete defines 20.3 size_t 20.4 remove several functions 20.5 remove CURLOPT_FAILONERROR 20.6 remove CURLOPT_DNS_USE_GLOBAL_CACHE 20.7 remove progress meter from libcurl 20.8 remove 'curl_httppost' from public 20.9 have form functions use CURL handle argument 20.10 Add CURLOPT_MAIL_CLIENT option ============================================================================== Loading Loading @@ -393,32 +398,47 @@ to provide the data to send. be possible to use ldap_bind_s() instead specifying the security context information ourselves. 11. New protocols 11. SMB 11.1 RSYNC 11.1 File listing support Add support for listing the contents of a SMB share. The output should probably be the same as/similar to FTP. 11.2 Honor file timestamps The timestamp of the transfered file should reflect that of the original file. 11.3 Use NTLMv2 Currently the SMB authentication uses NTLMv1. 12. New protocols 12.1 RSYNC There's no RFC for the protocol or an URI/URL format. An implementation should most probably use an existing rsync library, such as librsync. 12. SSL 13. SSL 12.1 Disable specific versions 13.1 Disable specific versions Provide an option that allows for disabling specific SSL versions, such as SSLv2 http://curl.haxx.se/bug/feature.cgi?id=1767276 12.2 Provide mutex locking API 13.2 Provide mutex locking API Provide a libcurl API for setting mutex callbacks in the underlying SSL library, so that the same application code can use mutex-locking independently of OpenSSL or GnutTLS being used. 12.3 Evaluate SSL patches 13.3 Evaluate SSL patches Evaluate/apply Gertjan van Wingerde's SSL patches: http://curl.haxx.se/mail/lib-2004-03/0087.html 12.4 Cache OpenSSL contexts 13.4 Cache OpenSSL contexts "Look at SSL cafile - quick traces look to me like these are done on every request as well, when they should only be necessary once per SSL context (or Loading @@ -428,7 +448,7 @@ to provide the data to send. style connections are re-used. It will make us use slightly more memory but it will libcurl do less creations and deletions of SSL contexts. 12.5 Export session ids 13.5 Export session ids Add an interface to libcurl that enables "session IDs" to get exported/imported. Cris Bailiff said: "OpenSSL has functions which can Loading @@ -436,18 +456,18 @@ to provide the data to send. the state from such a buffer at a later date - this is used by mod_ssl for apache to implement and SSL session ID cache". 12.6 Provide callback for cert verification 13.6 Provide callback for cert verification OpenSSL supports a callback for customised verification of the peer certificate, but this doesn't seem to be exposed in the libcurl APIs. Could it be? There's so much that could be done if it were! 12.7 improve configure --with-ssl 13.7 improve configure --with-ssl make the configure --with-ssl option first check for OpenSSL, then GnuTLS, then NSS... 12.8 Support DANE 13.8 Support DANE DNS-Based Authentication of Named Entities (DANE) is a way to provide SSL keys and certs over DNS using DNSSEC as an alternative to the CA model. Loading @@ -459,34 +479,34 @@ to provide the data to send. http://curl.haxx.se/mail/lib-2013-03/0103.html . libunbound may be the correct library to base this development on. 13. GnuTLS 14. GnuTLS 13.1 SSL engine stuff 14.1 SSL engine stuff Is this even possible? 13.2 check connection 14.2 check connection Add a way to check if the connection seems to be alive, to correspond to the SSL_peak() way we use with OpenSSL. 14. SASL 15. SASL 14.1 Other authentication mechanisms 15.1 Other authentication mechanisms Add support for other authentication mechanisms such as EXTERNAL, OLP, GSS-SPNEGO and others. 14.2 Add QOP support to GSSAPI authentication 15.2 Add QOP support to GSSAPI authentication Currently the GSSAPI authentication only supports the default QOP of auth (Authentication), whilst Kerberos V5 supports both auth-int (Authentication with integrity protection) and auth-conf (Authentication with integrity and privacy protection). 15. Client 16. Client 15.1 sync 16.1 sync "curl --sync http://example.com/feed[1-100].rss" or "curl --sync http://example.net/{index,calendar,history}.html" Loading @@ -495,12 +515,12 @@ to provide the data to send. remote file is newer than the local file. A Last-Modified HTTP date header should also be used to set the mod date on the downloaded file. 15.2 glob posts 16.2 glob posts Globbing support for -d and -F, as in 'curl -d "name=foo[0-9]" URL'. This is easily scripted though. 15.3 prevent file overwriting 16.3 prevent file overwriting Add an option that prevents cURL from overwriting existing local files. When used, and there already is an existing file with the target file name Loading @@ -508,14 +528,14 @@ to provide the data to send. existing). So that index.html becomes first index.html.1 and then index.html.2 etc. 15.4 simultaneous parallel transfers 16.4 simultaneous parallel transfers The client could be told to use maximum N simultaneous parallel transfers and then just make sure that happens. It should of course not make more than one connection to the same remote host. This would require the client to use the multi interface. http://curl.haxx.se/bug/feature.cgi?id=1558595 15.5 provide formpost headers 16.5 provide formpost headers Extending the capabilities of the multipart formposting. How about leaving the ';type=foo' syntax as it is and adding an extra tag (headers) which Loading @@ -529,43 +549,43 @@ to provide the data to send. which should overwrite the program reasonable defaults (plain/text, 8bit...) 15.6 warning when setting an option 16.6 warning when setting an option Display a warning when libcurl returns an error when setting an option. This can be useful to tell when support for a particular feature hasn't been compiled into the library. 16. Build 17. Build 16.1 roffit 17.1 roffit Consider extending 'roffit' to produce decent ASCII output, and use that instead of (g)nroff when building src/tool_hugehelp.c 17. Test suite 18. Test suite 17.1 SSL tunnel 18.1 SSL tunnel Make our own version of stunnel for simple port forwarding to enable HTTPS and FTP-SSL tests without the stunnel dependency, and it could allow us to provide test tools built with either OpenSSL or GnuTLS 17.2 nicer lacking perl message 18.2 nicer lacking perl message If perl wasn't found by the configure script, don't attempt to run the tests but explain something nice why it doesn't. 17.3 more protocols supported 18.3 more protocols supported Extend the test suite to include more protocols. The telnet could just do FTP or http operations (for which we have test servers). 17.4 more platforms supported 18.4 more platforms supported Make the test suite work on more platforms. OpenBSD and Mac OS. Remove fork()s and it should become even more portable. 17.5 Add support for concurrent connections 18.5 Add support for concurrent connections Tests 836, 882 and 938 were designed to verify that separate connections aren't used when using different login credentials in protocols that shouldn't re-use Loading @@ -579,14 +599,14 @@ to provide the data to send. and thus the wait for connections loop is never entered to receive the second connection. 18. Next SONAME bump 19. Next SONAME bump 18.1 http-style HEAD output for FTP 19.1 http-style HEAD output for FTP #undef CURL_FTP_HTTPSTYLE_HEAD in lib/ftp.c to remove the HTTP-style headers from being output in NOBODY requests over FTP 18.2 combine error codes 19.2 combine error codes Combine some of the error codes to remove duplicates. The original numbering should not be changed, and the old identifiers would be Loading @@ -611,29 +631,29 @@ to provide the data to send. CURLE_TFTP_PERM => CURLE_REMOTE_ACCESS_DENIED 18.3 extend CURLOPT_SOCKOPTFUNCTION prototype 19.3 extend CURLOPT_SOCKOPTFUNCTION prototype The current prototype only provides 'purpose' that tells what the connection/socket is for, but not any protocol or similar. It makes it hard for applications to differentiate on TCP vs UDP and even HTTP vs FTP and similar. 19. Next major release 20. Next major release 19.1 cleanup return codes 20.1 cleanup return codes curl_easy_cleanup() returns void, but curl_multi_cleanup() returns a CURLMcode. These should be changed to be the same. 19.2 remove obsolete defines 20.2 remove obsolete defines remove obsolete defines from curl/curl.h 19.3 size_t 20.3 size_t make several functions use size_t instead of int in their APIs 19.4 remove several functions 20.4 remove several functions remove the following functions from the public API: Loading @@ -654,18 +674,18 @@ to provide the data to send. curl_multi_socket_all 19.5 remove CURLOPT_FAILONERROR 20.5 remove CURLOPT_FAILONERROR Remove support for CURLOPT_FAILONERROR, it has gotten too kludgy and weird internally. Let the app judge success or not for itself. 19.6 remove CURLOPT_DNS_USE_GLOBAL_CACHE 20.6 remove CURLOPT_DNS_USE_GLOBAL_CACHE Remove support for a global DNS cache. Anything global is silly, and we already offer the share interface for the same functionality but done "right". 19.7 remove progress meter from libcurl 20.7 remove progress meter from libcurl The internally provided progress meter output doesn't belong in the library. Basically no application wants it (apart from curl) but instead applications Loading @@ -675,7 +695,7 @@ to provide the data to send. variable types passed to it instead of doubles so that big files work correctly. 19.8 remove 'curl_httppost' from public 20.8 remove 'curl_httppost' from public curl_formadd() was made to fill in a public struct, but the fact that the struct is public is never really used by application for their own advantage Loading @@ -684,7 +704,7 @@ to provide the data to send. Changing them to return a private handle will benefit the implementation and allow us much greater freedoms while still maintaining a solid API and ABI. 19.9 have form functions use CURL handle argument 20.9 have form functions use CURL handle argument curl_formadd() and curl_formget() both currently have no CURL handle argument, but both can use a callback that is set in the easy handle, and Loading @@ -692,7 +712,7 @@ to provide the data to send. curl_easy_perform() (or similar) called - which is hard to grasp and a design mistake. 19.10 Add CURLOPT_MAIL_CLIENT option 20.10 Add CURLOPT_MAIL_CLIENT option Rather than use the URL to specify the mail client string to present in the HELO and EHLO commands, libcurl should support a new CURLOPT specifically for Loading Loading
docs/TODO +121 −101 Original line number Diff line number Diff line Loading @@ -65,61 +65,66 @@ 10. LDAP 10.1 SASL based authentication mechanisms 11. New protocols 11.1 RSYNC 12. SSL 12.1 Disable specific versions 12.2 Provide mutex locking API 12.3 Evaluate SSL patches 12.4 Cache OpenSSL contexts 12.5 Export session ids 12.6 Provide callback for cert verification 12.7 improve configure --with-ssl 12.8 Support DANE 13. GnuTLS 13.1 SSL engine stuff 13.2 check connection 14. SASL 14.1 Other authentication mechanisms 14.2 Add QOP support to GSSAPI authentication 15. Client 15.1 sync 15.2 glob posts 15.3 prevent file overwriting 15.4 simultaneous parallel transfers 15.5 provide formpost headers 15.6 warning when setting an option 16. Build 16.1 roffit 17. Test suite 17.1 SSL tunnel 17.2 nicer lacking perl message 17.3 more protocols supported 17.4 more platforms supported 17.5 Add support for concurrent connections 18. Next SONAME bump 18.1 http-style HEAD output for FTP 18.2 combine error codes 18.3 extend CURLOPT_SOCKOPTFUNCTION prototype 19. Next major release 19.1 cleanup return codes 19.2 remove obsolete defines 19.3 size_t 19.4 remove several functions 19.5 remove CURLOPT_FAILONERROR 19.6 remove CURLOPT_DNS_USE_GLOBAL_CACHE 19.7 remove progress meter from libcurl 19.8 remove 'curl_httppost' from public 19.9 have form functions use CURL handle argument 19.10 Add CURLOPT_MAIL_CLIENT option 11. SMB 11.1 File listing support 11.2 Honor file timestamps 11.3 Use NTLMv2 12. New protocols 12.1 RSYNC 13. SSL 13.1 Disable specific versions 13.2 Provide mutex locking API 13.3 Evaluate SSL patches 13.4 Cache OpenSSL contexts 13.5 Export session ids 13.6 Provide callback for cert verification 13.7 improve configure --with-ssl 13.8 Support DANE 14. GnuTLS 14.1 SSL engine stuff 14.2 check connection 15. SASL 15.1 Other authentication mechanisms 15.2 Add QOP support to GSSAPI authentication 16. Client 16.1 sync 16.2 glob posts 16.3 prevent file overwriting 16.4 simultaneous parallel transfers 16.5 provide formpost headers 16.6 warning when setting an option 17. Build 17.1 roffit 18. Test suite 18.1 SSL tunnel 18.2 nicer lacking perl message 18.3 more protocols supported 18.4 more platforms supported 18.5 Add support for concurrent connections 19. Next SONAME bump 19.1 http-style HEAD output for FTP 19.2 combine error codes 19.3 extend CURLOPT_SOCKOPTFUNCTION prototype 20. Next major release 20.1 cleanup return codes 20.2 remove obsolete defines 20.3 size_t 20.4 remove several functions 20.5 remove CURLOPT_FAILONERROR 20.6 remove CURLOPT_DNS_USE_GLOBAL_CACHE 20.7 remove progress meter from libcurl 20.8 remove 'curl_httppost' from public 20.9 have form functions use CURL handle argument 20.10 Add CURLOPT_MAIL_CLIENT option ============================================================================== Loading Loading @@ -393,32 +398,47 @@ to provide the data to send. be possible to use ldap_bind_s() instead specifying the security context information ourselves. 11. New protocols 11. SMB 11.1 RSYNC 11.1 File listing support Add support for listing the contents of a SMB share. The output should probably be the same as/similar to FTP. 11.2 Honor file timestamps The timestamp of the transfered file should reflect that of the original file. 11.3 Use NTLMv2 Currently the SMB authentication uses NTLMv1. 12. New protocols 12.1 RSYNC There's no RFC for the protocol or an URI/URL format. An implementation should most probably use an existing rsync library, such as librsync. 12. SSL 13. SSL 12.1 Disable specific versions 13.1 Disable specific versions Provide an option that allows for disabling specific SSL versions, such as SSLv2 http://curl.haxx.se/bug/feature.cgi?id=1767276 12.2 Provide mutex locking API 13.2 Provide mutex locking API Provide a libcurl API for setting mutex callbacks in the underlying SSL library, so that the same application code can use mutex-locking independently of OpenSSL or GnutTLS being used. 12.3 Evaluate SSL patches 13.3 Evaluate SSL patches Evaluate/apply Gertjan van Wingerde's SSL patches: http://curl.haxx.se/mail/lib-2004-03/0087.html 12.4 Cache OpenSSL contexts 13.4 Cache OpenSSL contexts "Look at SSL cafile - quick traces look to me like these are done on every request as well, when they should only be necessary once per SSL context (or Loading @@ -428,7 +448,7 @@ to provide the data to send. style connections are re-used. It will make us use slightly more memory but it will libcurl do less creations and deletions of SSL contexts. 12.5 Export session ids 13.5 Export session ids Add an interface to libcurl that enables "session IDs" to get exported/imported. Cris Bailiff said: "OpenSSL has functions which can Loading @@ -436,18 +456,18 @@ to provide the data to send. the state from such a buffer at a later date - this is used by mod_ssl for apache to implement and SSL session ID cache". 12.6 Provide callback for cert verification 13.6 Provide callback for cert verification OpenSSL supports a callback for customised verification of the peer certificate, but this doesn't seem to be exposed in the libcurl APIs. Could it be? There's so much that could be done if it were! 12.7 improve configure --with-ssl 13.7 improve configure --with-ssl make the configure --with-ssl option first check for OpenSSL, then GnuTLS, then NSS... 12.8 Support DANE 13.8 Support DANE DNS-Based Authentication of Named Entities (DANE) is a way to provide SSL keys and certs over DNS using DNSSEC as an alternative to the CA model. Loading @@ -459,34 +479,34 @@ to provide the data to send. http://curl.haxx.se/mail/lib-2013-03/0103.html . libunbound may be the correct library to base this development on. 13. GnuTLS 14. GnuTLS 13.1 SSL engine stuff 14.1 SSL engine stuff Is this even possible? 13.2 check connection 14.2 check connection Add a way to check if the connection seems to be alive, to correspond to the SSL_peak() way we use with OpenSSL. 14. SASL 15. SASL 14.1 Other authentication mechanisms 15.1 Other authentication mechanisms Add support for other authentication mechanisms such as EXTERNAL, OLP, GSS-SPNEGO and others. 14.2 Add QOP support to GSSAPI authentication 15.2 Add QOP support to GSSAPI authentication Currently the GSSAPI authentication only supports the default QOP of auth (Authentication), whilst Kerberos V5 supports both auth-int (Authentication with integrity protection) and auth-conf (Authentication with integrity and privacy protection). 15. Client 16. Client 15.1 sync 16.1 sync "curl --sync http://example.com/feed[1-100].rss" or "curl --sync http://example.net/{index,calendar,history}.html" Loading @@ -495,12 +515,12 @@ to provide the data to send. remote file is newer than the local file. A Last-Modified HTTP date header should also be used to set the mod date on the downloaded file. 15.2 glob posts 16.2 glob posts Globbing support for -d and -F, as in 'curl -d "name=foo[0-9]" URL'. This is easily scripted though. 15.3 prevent file overwriting 16.3 prevent file overwriting Add an option that prevents cURL from overwriting existing local files. When used, and there already is an existing file with the target file name Loading @@ -508,14 +528,14 @@ to provide the data to send. existing). So that index.html becomes first index.html.1 and then index.html.2 etc. 15.4 simultaneous parallel transfers 16.4 simultaneous parallel transfers The client could be told to use maximum N simultaneous parallel transfers and then just make sure that happens. It should of course not make more than one connection to the same remote host. This would require the client to use the multi interface. http://curl.haxx.se/bug/feature.cgi?id=1558595 15.5 provide formpost headers 16.5 provide formpost headers Extending the capabilities of the multipart formposting. How about leaving the ';type=foo' syntax as it is and adding an extra tag (headers) which Loading @@ -529,43 +549,43 @@ to provide the data to send. which should overwrite the program reasonable defaults (plain/text, 8bit...) 15.6 warning when setting an option 16.6 warning when setting an option Display a warning when libcurl returns an error when setting an option. This can be useful to tell when support for a particular feature hasn't been compiled into the library. 16. Build 17. Build 16.1 roffit 17.1 roffit Consider extending 'roffit' to produce decent ASCII output, and use that instead of (g)nroff when building src/tool_hugehelp.c 17. Test suite 18. Test suite 17.1 SSL tunnel 18.1 SSL tunnel Make our own version of stunnel for simple port forwarding to enable HTTPS and FTP-SSL tests without the stunnel dependency, and it could allow us to provide test tools built with either OpenSSL or GnuTLS 17.2 nicer lacking perl message 18.2 nicer lacking perl message If perl wasn't found by the configure script, don't attempt to run the tests but explain something nice why it doesn't. 17.3 more protocols supported 18.3 more protocols supported Extend the test suite to include more protocols. The telnet could just do FTP or http operations (for which we have test servers). 17.4 more platforms supported 18.4 more platforms supported Make the test suite work on more platforms. OpenBSD and Mac OS. Remove fork()s and it should become even more portable. 17.5 Add support for concurrent connections 18.5 Add support for concurrent connections Tests 836, 882 and 938 were designed to verify that separate connections aren't used when using different login credentials in protocols that shouldn't re-use Loading @@ -579,14 +599,14 @@ to provide the data to send. and thus the wait for connections loop is never entered to receive the second connection. 18. Next SONAME bump 19. Next SONAME bump 18.1 http-style HEAD output for FTP 19.1 http-style HEAD output for FTP #undef CURL_FTP_HTTPSTYLE_HEAD in lib/ftp.c to remove the HTTP-style headers from being output in NOBODY requests over FTP 18.2 combine error codes 19.2 combine error codes Combine some of the error codes to remove duplicates. The original numbering should not be changed, and the old identifiers would be Loading @@ -611,29 +631,29 @@ to provide the data to send. CURLE_TFTP_PERM => CURLE_REMOTE_ACCESS_DENIED 18.3 extend CURLOPT_SOCKOPTFUNCTION prototype 19.3 extend CURLOPT_SOCKOPTFUNCTION prototype The current prototype only provides 'purpose' that tells what the connection/socket is for, but not any protocol or similar. It makes it hard for applications to differentiate on TCP vs UDP and even HTTP vs FTP and similar. 19. Next major release 20. Next major release 19.1 cleanup return codes 20.1 cleanup return codes curl_easy_cleanup() returns void, but curl_multi_cleanup() returns a CURLMcode. These should be changed to be the same. 19.2 remove obsolete defines 20.2 remove obsolete defines remove obsolete defines from curl/curl.h 19.3 size_t 20.3 size_t make several functions use size_t instead of int in their APIs 19.4 remove several functions 20.4 remove several functions remove the following functions from the public API: Loading @@ -654,18 +674,18 @@ to provide the data to send. curl_multi_socket_all 19.5 remove CURLOPT_FAILONERROR 20.5 remove CURLOPT_FAILONERROR Remove support for CURLOPT_FAILONERROR, it has gotten too kludgy and weird internally. Let the app judge success or not for itself. 19.6 remove CURLOPT_DNS_USE_GLOBAL_CACHE 20.6 remove CURLOPT_DNS_USE_GLOBAL_CACHE Remove support for a global DNS cache. Anything global is silly, and we already offer the share interface for the same functionality but done "right". 19.7 remove progress meter from libcurl 20.7 remove progress meter from libcurl The internally provided progress meter output doesn't belong in the library. Basically no application wants it (apart from curl) but instead applications Loading @@ -675,7 +695,7 @@ to provide the data to send. variable types passed to it instead of doubles so that big files work correctly. 19.8 remove 'curl_httppost' from public 20.8 remove 'curl_httppost' from public curl_formadd() was made to fill in a public struct, but the fact that the struct is public is never really used by application for their own advantage Loading @@ -684,7 +704,7 @@ to provide the data to send. Changing them to return a private handle will benefit the implementation and allow us much greater freedoms while still maintaining a solid API and ABI. 19.9 have form functions use CURL handle argument 20.9 have form functions use CURL handle argument curl_formadd() and curl_formget() both currently have no CURL handle argument, but both can use a callback that is set in the easy handle, and Loading @@ -692,7 +712,7 @@ to provide the data to send. curl_easy_perform() (or similar) called - which is hard to grasp and a design mistake. 19.10 Add CURLOPT_MAIL_CLIENT option 20.10 Add CURLOPT_MAIL_CLIENT option Rather than use the URL to specify the mail client string to present in the HELO and EHLO commands, libcurl should support a new CURLOPT specifically for Loading
