lib: further send/upload handling polish

- Move all the "upload_done" handling to request.c

- add possibility to abort sending of a request
- add `Curl_req_done_sending()` f

lib: further send/upload handling polish

- Move all the "upload_done" handling to request.c

- add possibility to abort sending of a request
- add `Curl_req_done_sending()` for checks
- transfer.c: readwrite_upload() now clean

- removing data->state.ulbuf and data->req.upload_fromhere

- as well as data->req.upload_present
- set data->req.upload_done on having read all from
the client and completely flushed the send buffer

- tftp, remove setting of data->req.upload_fromhere

- serves no purpose as `upload_present` is not set
and the data itself is directly `sendto()` anyway

- smtp, make upload EOB conversion a client reader
- xfer_ulbuf addition

- add xfer_ulbuf for borrowing, similar to xfer_buf
- use in file upload
- use in c-hyper body sending

- h1-proxy, remove init of data->state.uilbuf that is never used
- smb, add own send_buf instead of using data->state.ulbuf

Closes #13010

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misc: reduce struct and struct field sizes

- by using BIT() instead of bool
- imap: shrink struct
- ftp: make state 'unsigned char'
- ftp: sort ftp_conn struct entries on size

misc: reduce struct and struct field sizes

- by using BIT() instead of bool
- imap: shrink struct
- ftp: make state 'unsigned char'
- ftp: sort ftp_conn struct entries on size
- urldata: use smaller fields for SSL version info storage
- pop3: reduce the pop3_conn struct size
- smtp: reduce the size of the smtp structs

Closes #10186

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copyright: update all copyright lines and remove year ranges

- they are mostly pointless in all major jurisdictions
- many big corporations and projects already don't use them
- save

copyright: update all copyright lines and remove year ranges

- they are mostly pointless in all major jurisdictions
- many big corporations and projects already don't use them
- saves us from pointless churn
- git keeps history for us
- the year range is kept in COPYING

checksrc is updated to allow non-year using copyright statements

Closes #10205

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transfer: upload performance; avoid tiny send

Append to the upload buffer when only small amount remains in buffer
rather than performing a separate tiny send to empty buffer.

A

transfer: upload performance; avoid tiny send

Append to the upload buffer when only small amount remains in buffer
rather than performing a separate tiny send to empty buffer.

Avoid degenerative upload behavior which might cause curl to send mostly
1-byte DATA frames after exhausing the h2 send window size

Related discussion: https://github.com/nghttp2/nghttp2/issues/1722

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
Closes #8965

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copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the

copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the file
`.reuse/dep5`.

This commit also adds a Github workflow to check pull requests and adapts
copyright.pl to the changes.

Closes #8869

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lib: save a bit of space with some structure packing

- Reorder some internal struct members so that less padding is used.

This is an attempt at saving a bit of space by packing some

lib: save a bit of space with some structure packing

- Reorder some internal struct members so that less padding is used.

This is an attempt at saving a bit of space by packing some structs
(using pahole to find the holes) where it might make sense to do
so without losing readability.

I.e., I tried to avoid separating fields that seem grouped
together (like the cwd... fields in struct ftp_conn for instance).
Also abstained from touching fields behind conditional macros as
that quickly can get complicated.

Closes https://github.com/curl/curl/pull/6483

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lib: pass in 'struct Curl_easy *' to most functions

... in most cases instead of 'struct connectdata *' but in some cases in
addition to.

- We mostly operate on transfers and no

lib: pass in 'struct Curl_easy *' to most functions

... in most cases instead of 'struct connectdata *' but in some cases in
addition to.

- We mostly operate on transfers and not connections.

- We need the transfer handle to log, store data and more. Everything in
libcurl is driven by a transfer (the CURL * in the public API).

- This work clarifies and separates the transfers from the connections
better.

- We should avoid "conn->data". Since individual connections can be used
by many transfers when multiplexing, making sure that conn->data
points to the current and correct transfer at all times is difficult
and has been notoriously error-prone over the years. The goal is to
ultimately remove the conn->data pointer for this reason.

Closes #6425

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curl.se: new home

Closes #6172

smtp: Detect server support for the UTF-8 extension as defined in RFC-6531

smtp: Allow RCPT TO command to fail for some recipients

Introduces CURLOPT_MAIL_RCPT_ALLLOWFAILS.

Verified with the new tests 3002-3007

Closes #4816

copyrights: fix copyright year range

.. because checksrc's copyright year check stopped working.

Ref: https://github.com/curl/curl/pull/4547

Closes https://github.com/curl/

copyrights: fix copyright year range

.. because checksrc's copyright year check stopped working.

Ref: https://github.com/curl/curl/pull/4547

Closes https://github.com/curl/curl/pull/4549

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internals: rename the SessionHandle struct to Curl_easy

URLs: change all http:// URLs to https://

SASL: common state engine for imap/pop3/smtp

IMAP/POP3/SMTP: use a per-connection sub-structure for SASL parameters.

smtp: Fixed const'ness of nread parameter in Curl_smtp_escape_eob()

...and some comment typos!

email: Added mutual authentication flag

email: Introduced the GSSAPI states

smtp: Fixed login denied when server doesn't support AUTH capability

Specifying user credentials when the SMTP server doesn't support
authentication would cause curl to display "No known

smtp: Fixed login denied when server doesn't support AUTH capability

Specifying user credentials when the SMTP server doesn't support
authentication would cause curl to display "No known authentication
mechanisms supported!" and return CURLE_LOGIN_DENIED.

Reported-by: Tom Sparrow
Bug: http://curl.haxx.se/mail/lib-2014-03/0173.html

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smtp: Added support for VRFY and EXPN commands

smtp: Added support for NOOP and RSET commands

email: Added initial support for cancelling authentication

Should a client application fail to decode an authentication message
received from a server, or not support any of the paramete

email: Added initial support for cancelling authentication

Should a client application fail to decode an authentication message
received from a server, or not support any of the parameters given by
the server in the message, then the authentication phrase should be
cancelled gracefully by the client rather than simply terminating the
connection.

The authentication phrase should be cancelled by simply sending a '*'
to the server, in response to erroneous data being received, as per
RFC-3501, RFC-4954 and RFC-5034.

This patch adds the necessary state machine constants and appropriate
response handlers in order to add this functionality for the CRAM-MD5,
DIGEST-MD5 and NTLM authentication mechanisms.

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smtp: added basic SASL XOAUTH2 support

Added the ability to use an XOAUTH2 bearer token [RFC6750] with SMTP for
authentication using RFC6749 "OAuth 2.0 Authorization Framework".

smtp: added basic SASL XOAUTH2 support

Added the ability to use an XOAUTH2 bearer token [RFC6750] with SMTP for
authentication using RFC6749 "OAuth 2.0 Authorization Framework".

The bearer token is expected to be valid for the user specified in
conn->user. If CURLOPT_XOAUTH2_BEARER is defined and the connection has
an advertised auth mechanism of "XOAUTH2", the user and access token are
formatted as a base64 encoded string and sent to the server as
"AUTH XOAUTH2 <bearer token>".

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smtp: Fixed sending of double CRLF caused by first in EOB

If the mail sent during the transfer contains a terminating <CRLF> then
we should not send the first <CRLF> of the EOB as specif

smtp: Fixed sending of double CRLF caused by first in EOB

If the mail sent during the transfer contains a terminating <CRLF> then
we should not send the first <CRLF> of the EOB as specified in RFC-5321.

Additionally don't send the <CRLF> if there is "no mail data" as the
DATA command already includes it.

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smtp: Tidy up to move the eob counter to the per-request structure

Move the eob counter from the smtp_conn structure to the SMTP structure
as it is associated with a SMTP payload on a pe

smtp: Tidy up to move the eob counter to the per-request structure

Move the eob counter from the smtp_conn structure to the SMTP structure
as it is associated with a SMTP payload on a per-request basis.

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