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* Incompatible change: sqlite3 and per_user behaviour:
Now both redis and sqlite3 follows the common principles for per-user
statistics:
1) If per-user statistics is enabled check per-user tokens ONLY
2) If per-user statistics is not enabled then check common tokens ONLY
If you need old behaviour, then you'd need to use separate classifier
for per-user statistics.
* Implement redis statistics backend and cache
* Implement autolearning for statistics
* Reworked statistics architecture from scratch
* Add hyperscan (https://github.com/01org/hyperscan) engine for regular
expressions:
- add lazy loader for hyperscan databases
- rework regexp cache to have joint pcre/hyperscan scanning
- implement hyperscan pre-filter support
- add compilation guards for bad expressions
- implement `rspamadm control recompile` command
- implement hyperscan cache monitoring
- slides: <https://highsecure.ru/rspamd-hyperscan.pdf>
* Implement flexible task logging
* Rework fuzzy worker:
- it is now possible to run multiple fuzzy workers;
- implement lazy writing as sqlite3 is bad at concurrent writing;
- add retries for simple sql commands in fuzzy backend;
- use fine-grained transactions for fuzzy;
- implement new multi-pubkeys mode;
- allow encrypted only storages;
- rework statistics for fuzzy;
- add `rspamadm control fuzzystat` command for extended statistics;
- implement human readable output for the previous command;
- add condition script for learning fuzzy storage;
* Various fixes to SPF:
- fix `redirect` records;
- fix domains when parsing mx/ptr/a records in includes/redirects;
- fix issues with multiple addresses in SPF records;
- ignore SPF results in case of DNS failure;
- adjust TTL of records when resolving subelements of SPF records;
- always select `v=spf1` line if it is available
- do not cache records with DNS failure in subrequests;
- ignore records with temporary fails during subrequests resolving;
- fix `RDNS_RC_NOREC` support;
* Add clang plugin for static analysis:
- implement static checks for `rspamd_printf` format strings;
* Add 'allow_raw_input' option for non-mime messages
* Recognize types using libmagic
* Fix parsing of IPv6 received headers
* Add new interface of communication between workers in rspamd
* Add support for named socketpairs
* Don't write URLs by default as it is too verbose
* Set status for HTTP replies
* Try load `rspamd.conf.override`
* Implement words decaying for text parts to limit many checks
* Improve support of SA rules and plugins:
- add check_for_shifted_date and check_for_missing_to_header eval rules;
- add 'check_relays_unparseable' support;
- add `check_for_mime('mime_attachement')` function;
- use new re_cache interface for all SA rules;
- add support for `Mail::SpamAssassin::Plugin::MIMEHeader`;
- add support of 'special' SA headers to `exists` function;
- fix issue when SA metas contain other metas;
- fix freemail rules;
* Many fixes to the URL parser
* Match any newline character in regexps
* Fix resolving of upstreams and detection of poor IPv6 configurations
* Parse upstreams selection algorithm from the configuration line
* Add `reresolve` command to the control interface
* Generate fuzzy hashes from task metadata (URLs and headers)
* Add method to check if IP is local and `local_addrs` option
* Implement forced timeout for delayed filters
* Disable fast path of pcre-jit as it seems to be broken
* Bayes fixes:
- new normalizer function;
- really use weights of tokens from the OSB algorithm;
- restore multiple classifiers support;
* Rules changes:
- add `R_SUSPICIOUS_URL` rule that detects obfuscated URL's;
- improve empty image rule;
- rework `FORGED_RECIPIENTS` rule;
- reduce weight of `SUSPICIOUS_RECIPS`;
- fix `*_NORESOLVE_MX` symbols in hfilter;
- add `SUBJ_ALL_CAPS` rule with support of UTF8
- add spamhaus SBL to uribl
- fix `SUSPICIOUS_RECIPS` and `SORTED_RECIPS` rules
- remove `R_TO_SEEMS_AUTO` as it generates a lot of FP;
- add new Message-ID regexp for Thunderbird (by @moisseev);
* Plugins changes:
- allow ratelimit plugin to set symbol instead of pre-result
- support IP DNS black lists for URIBL (e.g spamhaus SBL);
- drop deprecated SURBL bits (by @fatalbanana)
- rename `JP_SURBL_MULTI` to `ABUSE_SURBL` (by @fatalbanana)
- add `SURBL_BLOCKED` (by @fatalbanana)
- add `CR_SURBL`
- SURBL: allow fallthrough to default symbol (by @fatalbanana)
- Settings: fix IP match (by @fatalbanana)
- SURBL: add missing symbols to metric (by @fatalbanana)
- allow processing images urls for SURBL
- unconditionally disable SPF for authenticated users and local networks
* Rework ratelimit plugin
- switch to `rates` instead of old and stupid strings to setup;
- check if a bucket is zero and disable the corresponding limits'
- turn off all buckets by default;
- check either `rcpt` or `user` buckets, not all together'
- document new `rates` and `symbol` options;
- inform user about what buckets are used in the configuration;
* Add neural network **experimental** plugin
* Add a sample script to learn neural network from rspamd logs
* Add documentation strings support to rspamd:
- add strings for the main configuration options;
- document workers options;
- add internal plugin options;
- create `rspamadm confighelp` routine;
- implement human readable output for the previous command;
- add subtree search support;
- add keyword search support;
* Documentation improvements, tutorials section, statistics description
* Many other minor and major bugfixes not noted here
Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>
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