Mercurial > dovecot > original-hg > dovecot-1.2
annotate TODO @ 4373:936e90b7d525 HEAD
Updated
author | Timo Sirainen <tss@iki.fi> |
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date | Fri, 16 Jun 2006 12:55:32 +0300 |
parents | d5381941feea |
children | a2d8624f8f2e |
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4373 | 1 - dbox: keyword list header locking isn't correct now. saving uses file's |
2 dotlock, sync uses sync lock. and what about reading?... | |
3 - mbox: CRLFs in headers break the mbox | |
4 - mbox: dirty mode should be stored to index | |
4257 | 5 - dbox is leaking index fds |
6 - dd if=/dev/zero of=dovecot.index bs=1024 count=1 -> NOOP -> crash! | |
7 - ACLs don't work properly with namespaces.. | |
8 - deliver: delivering mail to box smaller than mbox_min_index_size give | |
9 close() errors | |
4163 | 10 - per-user/ip limits.. |
4132 | 11 - trying to select non-existing mailbox with LF in its name prints the |
12 LF in error reply. also should we try to prevent CR/LFs from being used | |
13 in mailbox names completely?.. | |
4128 | 14 - convert-tool doesn't read dovecot.conf |
15 - dbox: append_offset in header shouldn't be trusted | |
16 - dbox: show in index if there are expunge-flagged mails in the mailbox | |
4163 | 17 - dbox: pop3_lock_session doesn't work |
18 - controldir for mboxes too and place subscriptions file there? | |
4128 | 19 - ability to specify default password scheme with passwd-file |
20 - add imap_logout_format | |
21 - quota code should probably be always doing some quota_set_critical() | |
22 instead of using mail_storage_set_critical(), so that quota_last_error() | |
23 would work properly | |
24 - x search charset asdf all -> should fail | |
25 - passdb passwd + passdb shadow -> passdb_password isn't reset to NULL | |
26 - when pipelining login command + post-login commands, login process should | |
27 pass the command to imap/pop3 process (at least one pop3 client does this) | |
3995 | 28 - imaptest: imap-login: Master sent reply with unknown tag 1 |
29 - client closed connection at the exact same time master was logging it | |
30 in? master_request_abort() | |
31 - delete >30min old dovecot.index.log.2 files when opening index? | |
3904 | 32 - dict-server should have some config file which lists the allowed dicts |
3670 | 33 - with blocking passdb we're not caching lookups if the password was wrong |
3904 | 34 - LDA: empty mail gives an error. |
3541 | 35 - if PAM child process doesn't finish within a minute, kill it |
36 - Support listening in multiple sockets?.. | |
37 - Thunderbird+pop3 DELE error..? | |
3450 | 38 - calls fsync()s etc. less often (when copying). optionally disable them. |
39 - stop using atol(), atoi(), strtoul() etc. in places where we actually | |
40 care about what they return, and rather create our own function which | |
41 checks if the input overflows the integer, and if so call i_fatal() | |
42 - when sorting maildir files, sort based on Mxxxx first so the files are | |
43 sorted always in ascending order. required for proper out-of-quota uidlist | |
44 handling | |
45 - Panic: file mail-index.c: line 844 (mail_index_sync_from_transactions): | |
46 assertion failed: (hdr.messages_count == (*map)->hdr.messages_count) | |
47 - after some locking timeouts: mbox-lock.c: line 518 (mbox_lock): assertion failed: (lock_type == F_RDLCK || mbox->mbox_lock_type != F_RDLCK) | |
48 | |
49 - Corrupted transaction log file dovecot.index.log: record size wrong (type 0x4, 20 % 12 != 0) | |
50 -> mail-index.c: line 841 (mail_index_sync_from_transactions): assertion failed: (hdr.messages_count == (*map)->hdr.messages_count) | |
51 | |
52 - subscribe #maildir -> LSUB "" * -> probably not listed? | |
53 - dovecot-auth workers: create a separate dovecot-pam worker which shares | |
54 pretty much all code with dovecot-auth worker but isn't linked against | |
55 any libraries. or..? this might be difficult to do, especially because the | |
56 workers currently can handle any kind of passdb/userb requests. perhaps | |
57 there should be a completely separate simple PAM authenticator binary. | |
58 - namespaces: add new "auto_disable" flag so if the mailbox can't be opened | |
59 (eg. file doesn't exist), just ignore the problem and disable the namespace | |
60 - auth master refcounting when handling user/request? | |
61 - PAM / checkpassword should use passdb-blocking | |
62 - solaris sendfile is broken? | |
3048 | 63 |
3087 | 64 - keywords: |
65 - add some limits to how many there can be | |
66 - don't return \* in PERMANENTFLAGS when we're full | |
67 - remove unused keywords? | |
2774 | 68 |
69 - caching | |
3904 | 70 - force bits should be used only for nonregistered fields |
71 - change envelope parsing not to use get_headers() so imap.envelope can | |
72 actually be cached without all the headers.. | |
73 - compression should drop fields with last_used < | |
74 (latest_mail_index_date - month) | |
75 - we could try compressing same field values into a single | |
76 location in cache file. | |
77 - support caching all message headers. this could be useful when | |
78 indexes are in local disk but actual mails are accessed through NFS. | |
2774 | 79 |
3087 | 80 - mbox |
3904 | 81 - size.physical isn't cached, but should it even be? .. |
82 - syncing existing indexes takes 4x longer than creating new one, why? | |
83 - how well does dirty sync + status work? it reads the last mail every | |
84 time? not very good.. | |
85 - always add empty line. make the parser require it too? syncing should | |
86 make sure there always exists two LFs at end of file. raw-mbox-stream | |
87 should make sure the last message ends with LF even if it doesn't exist | |
88 in the file | |
89 - Quote "From ", unquote ">From " | |
2774 | 90 - COPY doesn't work to itself (lock assert crash) |
3904 | 91 - keep mbox lock for two extra seconds after sync (do we really need to?) |
2143 | 92 - move /var/mail/user to ~/mbox if ~/mbox exists.. supposedly this |
93 could be useful if /var/mail doesn't have quota, but ~/mail does. | |
94 now, what do we then do if we can move only some of the mails?.. | |
95 - if we can't create dotlock file for mbox, make sure it still can be | |
96 selected in read-only state | |
97 | |
3087 | 98 - maildir |
99 - if indexes exist but dovecot-uidlist doesn't, it's not tried to be | |
100 recreated | |
101 - rename foo foo.xyz -> infinite loop possible? | |
102 - we probably shouldn't do duplicate detection/fixing?.. or at least stat() | |
103 the old file before trying, because we might have just previously seen | |
104 the old file and then new file and then we try to fix it.. | |
3450 | 105 - with pop3 don't move messages from new/ to cur/ before RETR |
3087 | 106 |
2143 | 107 - index |
108 - optimize initial left_idx in mail_index_lookup_uid_range() | |
109 - if log file is lost, generate it from old and new index | |
3087 | 110 - transaction log: when replacing log with a same sequence, we remove it |
111 from log's file list, but we don't do anything to existing log views. | |
112 this can crash later in mail_transaction_log_view_set() because 'first' | |
113 is from log list, while we're comparing it into view->tail which it never | |
114 is. also overwriting it leaks memory.. | |
115 - read-only support for mailboxes where we don't have write-access | |
116 - when mailbox is deleted/renamed and someone else had it open, we get | |
117 stat() error messages in log file. | |
2143 | 118 |
3087 | 119 - lib-storage |
120 - index_removal_timeout gets leaked in some conditions. how? | |
121 - subscribe: IMAP(anonymous): open(anonymous/mail/.temp...) failed: Permission denied | |
122 - subscriptions file should contain namespace prefixes. at least optionally. | |
123 there's the subscriptions = yes setting now for namespaces.. do it so that | |
124 if prefix = "" has subscriptions, it contains prefixes. otherwise not. | |
4128 | 125 - for shared/public namespaces default to "no" |
3087 | 126 - should we allow following symlinks in mbox/maildirs? they are now. |
127 - if we implement shared mailboxes with shared indexes, never do that or | |
128 others could symlink your personal mailboxes and see the indexes | |
129 created for it which may contain envelope etc. data | |
130 - this allows circular mailbox hierarchies which should be prevented by | |
131 eg. allowing max. 20 hierarchies. | |
860 | 132 - limit folder hierarchy levels? user can now create eg. a/a/a/a/... |
133 and then start renaming them from end to beginning, which probably will | |
134 at some point start causing syscall failures which will fill up logs. | |
3087 | 135 |
136 - login | |
137 - Digest-MD5: support integrity protection, and maybe crypting. Do it | |
138 through login process like SSL is done? | |
139 - x login foo bar | |
140 x NO Authentication failed. | |
141 x login cras pass | |
142 * BYE Disconnected for inactivity. | |
143 ^ but it's not disconnecting! (buggy dovecot-auth not replying) | |
3744 | 144 probably because userdb lookup didn't reply, and fd was already sent |
145 for master.. should imap-login be handling it anymore?.. | |
3087 | 146 - imap-login: Authenticate PLAIN failed: Authentication failed: |
147 Authentication server isn't connected, try again later.. [127.0.0.1] | |
148 ^ NO Authentication failed. (should be Temporary login failure!) | |
149 - if auth process dies, login process should retry authentication if | |
150 possible. or if not, disconnect the client so it doesn't think the auth | |
151 failed. | |
152 - send client IP immediately after accept() to master process. make sure | |
153 master shows the IP if login dies unexpectedly. master should probably | |
154 also kill the login process if it doesn't kill itself soon enough.. or | |
155 maybe just log the IP immediately. | |
474 | 156 |
3087 | 157 - auth |
158 - support specifying hex/base64 encoding in password scheme. for example | |
159 {plain-md5.base64} | |
160 - auth protocol: make sure values can't have tabs/lfs | |
161 - auth cache: cache userdb data too. | |
162 - remove system_user and allow returning multiple gids instead. | |
163 - SIGHUP restarts auth processes .. but does it wait until they've finished | |
164 with all requests? no. | |
4373 | 165 - post-login-sql-command (userdb command doesn't do because of deliver) |
3087 | 166 - does dovecot-auth really break when it runs out of fds? |
167 - dovecot-auth should limit how fast authentication requests are allowed from | |
168 login processes. especially if there's one login/connection the speed | |
169 should be something like once/sec. also limit how fast to accept new | |
170 connections. | |
171 - support read-only logins. user could with alternative password get only | |
172 read-access to mails so mails could be read relatively safely with | |
173 untrusted computers. Maybe always send [ALERT] about the previous | |
174 read-only login time with IP? | |
526 | 175 |
3087 | 176 - master |
177 - configurable syslog prefix | |
178 - SIGHUP rather shouldn't restart listening sockets if they didn't change.. | |
3450 | 179 - if there are duplicate settings, complain about it |
3087 | 180 |
181 - quota | |
182 - if dovecot-uidlist can't be written, assume the new mails have UIDs | |
183 beginning from uidlist.next_uid. Whenever mails are expunged, overwrite | |
184 the next_uid field with the current highest next_uid. Whenever we have | |
185 assumed UIDs and uidlist gets updated, throw the client out with | |
186 "inconsist mailbox". | |
187 - make sure all syscalls check for ENOSPACE (and ENOACCESS while at it) | |
188 | |
189 - ssl | |
190 - add setting: ssl_options = bitmask. by default we enable all openssl | |
191 workarounds, this could be used to disable some of them | |
192 - gnutls support isn't working | |
965 | 193 |
3087 | 194 - search |
195 - message header search: we should ignore LWSP between two MIME blocks | |
1250 | 196 - message_body_search() could accept multiple search keywords so we |
197 wouldn't need to call it separately for each one (so we wouldn't need | |
198 to parse the message multiple times). | |
199 - message_body_search() could support NULL MessagePart and the searching | |
200 could be done while parsing the message. this would need changes to | |
201 message_parse() as well. | |
202 - could optionally support scanning inside file attachments and use | |
203 plugins to extract text out of them (word, excel, pdf, etc. etc.) | |
204 - use a trie index for fast text searching, like cyrus squat? | |
205 - Create our own extension: When searching with TEXT/BODY, return | |
206 the message text surrounding the keywords just like web search engines | |
207 do. like: SEARCH X-PRINT-MATCHES TEXT "hello" -> * SEARCH 1 "He said: | |
208 Hello world!" 2 "Hello, I'm ...". This would be especially useful with | |
209 the above attachment scanning. | |
0 | 210 |
3087 | 211 - lib-charset |
212 - utf8_toupper() is a must. and a bit difficult if we want to do it right. | |
213 - add support for other things than iconv() as well? we could reuse | |
214 the code from cyrus or courier | |
215 - cache iconvs? they'd probably be faster if we just reset the | |
216 conversion instead of opening new one every time. and there will likely | |
217 be only one or two charsets which are used for nearly all conversions. | |
218 | |
219 - general | |
220 - rfc2231 continuation support (useless?) | |
1553 | 221 - rfc2557 support for BODYSTRUCTURE, as specified by RFC3501 |
3541 | 222 - lmtp server - is it needed? |
1250 | 223 - create indexer binary |
3087 | 224 - ~/.dovecotrc to override system wide settings. namespace settings should |
225 override all the previous namespace settings instead of adding new. | |
226 - option to disable SORT, SEARCH and other memory/cpu-intensive features. | |
227 defaults and per-user by dovecot-auth. | |
228 - dotlock overriding is racy, but it's pretty difficult to fix it. Also | |
229 overriding someone else's dotlock in shared folder isn't possible. These | |
230 could be fixed by having separate lock process running as root, which | |
231 would chown() the file for another uid and then unlink() it as that user. | |
232 One problem with that is that if malicious user sets setuid+execute bits | |
233 on for the file, he could run the file and get changed to the new uid. | |
234 That hopefully shouldn't matter much since the new uid should be user | |
235 with minimum possible privileges. Anyway, optional.. | |
236 - things break if next_uid gets to 2^32 | |
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237 |
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238 capabilities: |
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239 - preferrably all should be possible to #ifdef away by a configure |
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240 option (--without-capabilities=acl,namespace,...) |
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241 - possibility to disable them from config file |
3087 | 242 - THREAD=ORDEREDSUBJECT - although pretty useless I'd think. |
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243 - acl (rfc2086, draft-ietf-imapext-acl), namespace (rfc2342) |
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244 - probably do it like cyrus. "user.<username>" to access other |
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245 users, with "" defaulting to "user.<myself>". these should be |
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246 configurable however. |
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247 - shared namespaces? maybe configurable in config file |
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248 - easiest way to do ACL would be to use unix modes, but is that |
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249 useful at all? Well, ACL2 has a bit better support for that, so |
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250 maybe we could support it. |
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251 - otherwise gets a bit trickly, we could keep all mail in "imapmail" |
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252 group and 0600/0700 mode by default, but when mail is shared to others, |
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253 the group read/write access bits would be set. or alternatively we |
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254 could launch another imap process to handle it, which we should support |
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255 anyway. ACLs could be stored into ".acl" ascii file in each folder. |
480 | 256 - support for private and shared flags, configurable by mailbox admin. |
257 this isn't in any draft yet, but ACL2 author was going to create one. | |
258 [SHAREDFLAGS (...)] would specify which ones are shared, don't know yet | |
259 how they would be configured. | |
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260 - quota (rfc2087, draft-cridland-imap-quota) |
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261 - give filesystem values only to admins |
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262 - support for Maildir++, probably no need to support more. |
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263 quota capability supports complex quota configuration, but if |
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264 no mailer supports them we probably shouldn't bother either |
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265 - id (rfc2971) |
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266 - must be configurable what gets sent, default to only name=Dovecot |
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267 - separate pre/post-login settings |
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268 - optionally log configured parts of the client information, but only |
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269 once, probably at the same time as logging "Logged in", |
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270 "Disconnected", etc. |
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271 - remember to force truncating values longer than 30 chars, |
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272 especially before logging |
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273 - mailbox-referrals (rfc2193) |
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274 - this is useful whenever we would otherwise need to make the |
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275 connection ourself. for example load balancing and shared mailboxes |
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276 requiring another UID to run. |
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277 - this rfc defines no exact way for server to detect if client |
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278 supports referrals or not. I don't think there's much point in |
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279 supporting only referrals, as most clients don't support them. |
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280 Instead we should return referrals when we know that client |
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281 supports them, otherwise do the connecting ourself. If client |
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282 issues RLIST or RLSUB command, it's safe to assume it supports |
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283 referrals. |
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284 - for load balancing this works just fine, but what about shared |
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285 mailboxes which require different UID? If we login with our own |
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286 username, we end up with our own UID instead of what we wanted. |
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287 IMAP URLs don't support separated authorization id which would |
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288 have made this very easy.. We could give the "userid@group" as |
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289 userid, but clients probably treat it as different userid and |
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290 ask the password again. |
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291 - problems, problems, .. maybe not worth the trouble. |
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292 - drafts: |
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293 - http://www.imc.org/ids.html |
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294 - annotate (draft-ietf-imapext-annotate) |
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295 - per-message annotations. this will be major change. especially |
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296 because currently there's no suitable storage for them, and |
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297 they'll probably change all the time.. maybe if we moved into |
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298 berkeley db to store the .data file and these annotations. |
1178 | 299 - this is separate problem from index files. indexes are treated as |
300 temporary files, annotations are permanent data. we'd have to | |
301 support non-db way to do this too, which would probably be just a | |
302 simple (slow) text file. | |
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303 - annotatemore (draft-daboo-imap-annotatemore) |
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304 - server and per-mailbox annotations. much easier than |
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305 per-message annotations, but they'd be easier to place into |
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306 db as well. |
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307 - binary (draft-nerenberg-imap-binary) |
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308 - perhaps not too useful. I'd like to make Dovecot fully |
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309 binary-safe though. |
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310 - view (draft-ietf-imapext-view) |
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311 - slow, complex, luckily draft expired almost two years ago. |
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312 i hope i don't have to implement this :) |
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313 - can be done client-side just fine (evolution's virtual folders) |