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Updated the coding style, in this function, to be consistant with other
response functions rather then performing a hard return on failure.
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Added support for specifying the preferred authentication mechanism in
the URL as per Internet-Draft 'draft-earhart-url-smtp-00'.
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warning: unused variable 'smtp' introduced in commit 73cbd21b5ee6.
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Updated the function description comments following commit 4838d196fdbf.
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Moved the blocking state machine to the disconnect functions so that the
logout / quit functions are only responsible for sending the actual
command needed to logout or quit.
Additionally removed the hard return on failure.
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Added comments and simplified convoluted dophase_done comparison.
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Removed unwanted braces and added variable initialisation.
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Optimised the result test in each of the block_statemach() functions.
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Some state changes would be performed after a failure test that
performed a hard return, whilst others would be performed within a test
for success. Updated the code, for consistency, so all instances are
performed within a success test.
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Small tidy up to keep some comments consistant across each of the email
protocols.
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Following commit ad3177da24b8 corrected the debug message in state()
from AUTH to AUTH_FINAL.
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Changed the final SMTP_AUTH constant to SMTP_AUTH_FINAL for consistency
with the response function.
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Removed this pointer to a downloaded bytes counter because it was set in
smtp_init() to point to the same variable the transfer functions keep
the count in (k->bytecount), effectively making the code in transfer.c
"*k->bytecountp = k->bytecount" a no-op.
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Removed user and passwd from the SMTP struct as these cannot be set on
a per-request basis and are leftover from legacy FTP code.
Changed some comments still using FTP terminology.
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Moved the rcpt variable from the per-connection struct smtp_conn to the
new per-request struct and fixed references accordingly.
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Created a new SMTP structure and changed the type of the smtp proto
variable in connectdata from FTP* to SMTP*.
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Tidied up result variables to be consistent in name, declaration order
and default values.
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Due to the reordering of functions in commit 586f5d361474 the forward
declaration to state_upgrade_tls() are no longer required.
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... since they're not used by the easy interface really, I wanted to
remove the association. Also, I unified the pingpong statemachine driver
into a single function with a 'wait' argument: Curl_pp_statemach.
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Remove tailing whitespace introduced in commit 7ed689d24a4e.
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Renamed smtp_state_auth_resp() function to match the implementations in
IMAP and POP3.
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Replaced two explicit comparisons of CURLE_OK with boolean alternatives.
General tidy up of comments.
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The smtp_connect() function was setting the member variables of the
pingpong structure twice, once before calling Curl_pp_init() and once
after!
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Removed unnecessary end of line check and return.
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Reworked the pp->endofresp() function so that the conndata, line and
line length are passed down to it just as with Curl_client_write()
rather than each implementation of the function having to query
these values.
Additionally changed the int return type to bool as this is more
representative of the function's usage.
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Corrected the order of the upgrade_tls() functions and moved the handler
upgrade and getsock() functions out from the middle of the state related
functions.
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Added honoring of the tls_supported flag when starting a TLS upgrade
rather than unconditionally attempting it. If the use_ssl flag is set
to CURLUSESSL_TRY and the server doesn't support TLS upgrades then the
connection will continue to authenticate. If this flag is set to
CURLUSESSL_ALL then the connection will complete with a failure as it
did previously.
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Introduced detection of the STARTTLS capability, in order to add support
for TLS upgrades without unconditionally sending the STARTTLS command.
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Follow up fix to commit 62bd21746443 to cater for servers that don't
respond with a 250 in their EHLO responses. Additionally updated the
SMTP tests to respond with a 250 response code as per RFC5321.
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Follow up fix to commit 23d17190ee32 as EHLO capabilities can exist
within a positive response line.
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Follow up to commit 40f9bb787f05 to fix missing capabilities after an
AUTH line.
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Fixed a small issue where smtp_endofresp() would look for capabilities
in the description part of a failure response. In theory a server
shouldn't respond with SIZE or AUTH in an EHLO command's failure
response but if it did then capabilities would be unnecessarily set
before eventually failing.
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Renamed the login password response function to better describe it's
purpose as well as for consistency with the imap and pop3 modules.
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Changed the SMTP_AUTH_PASSWD state constant to SMTP_AUTH_LOGIN_PASSWD to
better describe the state as the second part of an AUTH LOGIN command,
as well as for consistency with the imap and pop3 modules.
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To help maintain the readability of the code in imap.c, pop3.c and
smtp.c moved the starttls code into state_starttls() functions.
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Tidied up the comments in the endofresp() functions to be more
meaningful prior to release.
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Provided additional clarification about the logic of the authenticate()
functions following commit 6b6bdc83bd36 and b4270a9af1d0.
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The state machine should only be changed to SMTP_STARTTLS when the
STARTTLS command has been successfully sent to the server.
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