Mercurial > dovecot > original-hg > dovecot-1.2
annotate TODO @ 5317:4bc257a1874e HEAD
Crashfix
| author | Timo Sirainen <tss@iki.fi> |
|---|---|
| date | Thu, 15 Mar 2007 03:34:44 +0200 |
| parents | a2d8624f8f2e |
| children | 657406346288 |
| rev | line source |
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| 3087 | 1 - keywords: |
| 2 - add some limits to how many there can be | |
| 3 - don't return \* in PERMANENTFLAGS when we're full | |
| 4 - remove unused keywords? | |
| 2774 | 5 |
| 6 - caching | |
| 3904 | 7 - force bits should be used only for nonregistered fields |
| 8 - change envelope parsing not to use get_headers() so imap.envelope can | |
| 9 actually be cached without all the headers.. | |
| 10 - compression should drop fields with last_used < | |
| 11 (latest_mail_index_date - month) | |
| 12 - we could try compressing same field values into a single | |
| 13 location in cache file. | |
| 14 - support caching all message headers. this could be useful when | |
| 15 indexes are in local disk but actual mails are accessed through NFS. | |
| 2774 | 16 |
| 3087 | 17 - mbox |
| 4449 | 18 - dirty state should be stored to index (with mbox_very_dirty_syncs) |
| 19 - after some locking timeouts: mbox-lock.c: line 518 (mbox_lock): | |
| 20 assertion failed: (lock_type == F_RDLCK || mbox->mbox_lock_type != F_RDLCK) | |
| 21 - controldir for mboxes too and place subscriptions file there? | |
| 3904 | 22 - size.physical isn't cached, but should it even be? .. |
| 23 - syncing existing indexes takes 4x longer than creating new one, why? | |
| 24 - how well does dirty sync + status work? it reads the last mail every | |
| 25 time? not very good.. | |
| 26 - always add empty line. make the parser require it too? syncing should | |
| 27 make sure there always exists two LFs at end of file. raw-mbox-stream | |
| 28 should make sure the last message ends with LF even if it doesn't exist | |
| 29 in the file | |
| 30 - Quote "From ", unquote ">From " | |
| 4449 | 31 - COPY doesn't work to itself (lock assert crash, for now just disallowed) |
| 3904 | 32 - keep mbox lock for two extra seconds after sync (do we really need to?) |
| 2143 | 33 - move /var/mail/user to ~/mbox if ~/mbox exists.. supposedly this |
| 34 could be useful if /var/mail doesn't have quota, but ~/mail does. | |
| 35 now, what do we then do if we can move only some of the mails?.. | |
| 36 - if we can't create dotlock file for mbox, make sure it still can be | |
| 37 selected in read-only state | |
| 38 | |
| 3087 | 39 - maildir |
| 40 - if indexes exist but dovecot-uidlist doesn't, it's not tried to be | |
| 41 recreated | |
| 3450 | 42 - with pop3 don't move messages from new/ to cur/ before RETR |
| 4449 | 43 - when sorting maildir files, sort based on Mxxxx first so the files are |
| 44 sorted always in ascending order. required for proper out-of-quota | |
| 45 uidlist handling | |
| 46 | |
| 47 - dbox | |
| 48 - keyword list header locking isn't correct now. saving uses file's | |
| 49 dotlock, sync uses sync lock. and what about reading?... | |
| 50 - dbox is leaking index fds | |
| 51 - append_offset in header shouldn't be trusted | |
| 52 - show in index if there are expunge-flagged mails in the mailbox | |
| 53 - pop3_lock_session doesn't work | |
| 3087 | 54 |
| 2143 | 55 - index |
| 4449 | 56 - dd if=/dev/zero of=dovecot.index bs=1024 count=1 -> NOOP -> crash! |
| 57 - delete >30min old dovecot.index.log.2 files when opening index? | |
| 58 - Panic: file mail-index.c: line 844 (mail_index_sync_from_transactions): | |
| 59 assertion failed: (hdr.messages_count == (*map)->hdr.messages_count) | |
| 60 - Corrupted transaction log file dovecot.index.log: record size wrong (type 0x4, 20 % 12 != 0) | |
| 61 -> mail-index.c: line 841 (mail_index_sync_from_transactions): assertion failed: (hdr.messages_count == (*map)->hdr.messages_count) | |
| 62 - optimize initial left_idx in _view_lookup_uid_range() | |
| 2143 | 63 - if log file is lost, generate it from old and new index |
| 3087 | 64 - transaction log: when replacing log with a same sequence, we remove it |
| 65 from log's file list, but we don't do anything to existing log views. | |
| 66 this can crash later in mail_transaction_log_view_set() because 'first' | |
| 67 is from log list, while we're comparing it into view->tail which it never | |
| 68 is. also overwriting it leaks memory.. | |
| 69 - read-only support for mailboxes where we don't have write-access | |
| 2143 | 70 |
| 4449 | 71 - namespaces |
| 72 - namespaces: add new "auto_disable" flag so if the mailbox can't be opened | |
| 73 (eg. file doesn't exist), just ignore the problem and disable the | |
| 74 namespace | |
| 75 - subscribe <namespace prefix> doesn't work. | |
| 76 - namespaces don't work in plugins: acl, trash, convert | |
| 3087 | 77 - subscriptions file should contain namespace prefixes. at least optionally. |
| 78 there's the subscriptions = yes setting now for namespaces.. do it so that | |
| 79 if prefix = "" has subscriptions, it contains prefixes. otherwise not. | |
| 4128 | 80 - for shared/public namespaces default to "no" |
| 4449 | 81 |
| 82 - lib-storage | |
| 83 - calls fsync()s etc. less often (when copying). optionally disable them. | |
| 84 - x search charset asdf all -> should fail | |
| 85 - index_removal_timeout gets leaked in some conditions. how? | |
| 86 - subscribe: IMAP(anonymous): open(anonymous/mail/.temp...) failed: Permission denied | |
| 3087 | 87 - should we allow following symlinks in mbox/maildirs? they are now. |
| 88 - if we implement shared mailboxes with shared indexes, never do that or | |
| 89 others could symlink your personal mailboxes and see the indexes | |
| 90 created for it which may contain envelope etc. data | |
| 91 - this allows circular mailbox hierarchies which should be prevented by | |
| 92 eg. allowing max. 20 hierarchies. | |
| 93 | |
| 94 - login | |
| 4449 | 95 - when pipelining login command + post-login commands, login process should |
| 96 pass the command to imap/pop3 process (at least one pop3 client does this) | |
| 97 - imap-login: Master sent reply with unknown tag 1. client closed | |
| 98 connection at the exact same time master was logging it in? | |
| 99 see master_request_abort() | |
| 3087 | 100 - Digest-MD5: support integrity protection, and maybe crypting. Do it |
| 101 through login process like SSL is done? | |
| 102 - x login foo bar | |
| 103 x NO Authentication failed. | |
| 104 x login cras pass | |
| 105 * BYE Disconnected for inactivity. | |
| 106 ^ but it's not disconnecting! (buggy dovecot-auth not replying) | |
| 3744 | 107 probably because userdb lookup didn't reply, and fd was already sent |
| 108 for master.. should imap-login be handling it anymore?.. | |
| 3087 | 109 - imap-login: Authenticate PLAIN failed: Authentication failed: |
| 110 Authentication server isn't connected, try again later.. [127.0.0.1] | |
| 111 ^ NO Authentication failed. (should be Temporary login failure!) | |
| 112 - if auth process dies, login process should retry authentication if | |
| 113 possible. or if not, disconnect the client so it doesn't think the auth | |
| 114 failed. | |
| 115 - send client IP immediately after accept() to master process. make sure | |
| 116 master shows the IP if login dies unexpectedly. master should probably | |
| 117 also kill the login process if it doesn't kill itself soon enough.. or | |
| 118 maybe just log the IP immediately. | |
| 474 | 119 |
| 3087 | 120 - auth |
| 4449 | 121 - ability to specify default password scheme with passwd-file |
| 122 - with blocking passdb we're not caching lookups if the password was wrong | |
| 123 - if PAM child process doesn't finish within a minute, kill it | |
| 124 - PAM / checkpassword should use passdb-blocking | |
| 3087 | 125 - support specifying hex/base64 encoding in password scheme. for example |
| 126 {plain-md5.base64} | |
| 127 - auth cache: cache userdb data too. | |
| 128 - remove system_user and allow returning multiple gids instead. | |
| 129 - SIGHUP restarts auth processes .. but does it wait until they've finished | |
| 130 with all requests? no. | |
| 4373 | 131 - post-login-sql-command (userdb command doesn't do because of deliver) |
| 3087 | 132 - does dovecot-auth really break when it runs out of fds? |
| 4449 | 133 - dovecot-auth should limit how fast authentication requests are allowed |
| 134 from login processes. especially if there's one login/connection the speed | |
| 3087 | 135 should be something like once/sec. also limit how fast to accept new |
| 136 connections. | |
| 137 - support read-only logins. user could with alternative password get only | |
| 138 read-access to mails so mails could be read relatively safely with | |
| 139 untrusted computers. Maybe always send [ALERT] about the previous | |
| 140 read-only login time with IP? | |
| 4449 | 141 - dovecot-auth workers: create a separate dovecot-pam worker which shares |
| 142 pretty much all code with dovecot-auth worker but isn't linked against | |
| 143 any libraries. or..? this might be difficult to do, especially because the | |
| 144 workers currently can handle any kind of passdb/userb requests. perhaps | |
| 145 there should be a completely separate simple PAM authenticator binary. | |
| 526 | 146 |
| 3087 | 147 - master |
| 4449 | 148 - Support listening in multiple sockets |
| 149 - per-user/ip limits.. | |
| 3087 | 150 - configurable syslog prefix |
| 151 - SIGHUP rather shouldn't restart listening sockets if they didn't change.. | |
| 3450 | 152 - if there are duplicate settings, complain about it |
| 3087 | 153 |
| 154 - quota | |
| 155 - if dovecot-uidlist can't be written, assume the new mails have UIDs | |
| 156 beginning from uidlist.next_uid. Whenever mails are expunged, overwrite | |
| 157 the next_uid field with the current highest next_uid. Whenever we have | |
| 158 assumed UIDs and uidlist gets updated, throw the client out with | |
| 159 "inconsist mailbox". | |
| 160 - make sure all syscalls check for ENOSPACE (and ENOACCESS while at it) | |
| 4449 | 161 - quota code should probably be always doing some quota_set_critical() |
| 162 instead of using mail_storage_set_critical(), so that quota_last_error() | |
| 163 would work properly | |
| 164 - if storage=0 is given, use unlimited quota but track it anyway | |
| 3087 | 165 |
| 166 - ssl | |
| 167 - add setting: ssl_options = bitmask. by default we enable all openssl | |
| 168 workarounds, this could be used to disable some of them | |
| 169 - gnutls support isn't working | |
| 965 | 170 |
| 3087 | 171 - search |
| 172 - message header search: we should ignore LWSP between two MIME blocks | |
| 1250 | 173 - message_body_search() could accept multiple search keywords so we |
| 174 wouldn't need to call it separately for each one (so we wouldn't need | |
| 175 to parse the message multiple times). | |
| 176 - message_body_search() could support NULL MessagePart and the searching | |
| 177 could be done while parsing the message. this would need changes to | |
| 178 message_parse() as well. | |
| 179 - could optionally support scanning inside file attachments and use | |
| 180 plugins to extract text out of them (word, excel, pdf, etc. etc.) | |
| 181 - use a trie index for fast text searching, like cyrus squat? | |
| 182 - Create our own extension: When searching with TEXT/BODY, return | |
| 183 the message text surrounding the keywords just like web search engines | |
| 184 do. like: SEARCH X-PRINT-MATCHES TEXT "hello" -> * SEARCH 1 "He said: | |
| 185 Hello world!" 2 "Hello, I'm ...". This would be especially useful with | |
| 186 the above attachment scanning. | |
| 0 | 187 |
| 3087 | 188 - lib-charset |
| 189 - utf8_toupper() is a must. and a bit difficult if we want to do it right. | |
| 190 - add support for other things than iconv() as well? we could reuse | |
| 191 the code from cyrus or courier | |
| 192 - cache iconvs? they'd probably be faster if we just reset the | |
| 193 conversion instead of opening new one every time. and there will likely | |
| 194 be only one or two charsets which are used for nearly all conversions. | |
| 195 | |
| 4449 | 196 - deliver |
| 197 - empty mail gives an error. | |
| 198 - We should always return EX_* failures and never our own 89 etc. | |
| 199 | |
| 3087 | 200 - general |
| 4449 | 201 - add imap_logout_format |
| 202 - stop using atol(), atoi(), strtoul() etc. in places where we actually | |
| 203 care about what they return, and rather create our own function which | |
| 204 checks if the input overflows the integer, and if so call i_fatal() | |
| 205 - solaris sendfile is broken? | |
| 3087 | 206 - rfc2231 continuation support (useless?) |
| 1553 | 207 - rfc2557 support for BODYSTRUCTURE, as specified by RFC3501 |
| 4449 | 208 - LMTP server |
| 209 - ability to build plugins statically into the binaries | |
| 3087 | 210 - ~/.dovecotrc to override system wide settings. namespace settings should |
| 211 override all the previous namespace settings instead of adding new. | |
| 212 - option to disable SORT, SEARCH and other memory/cpu-intensive features. | |
| 213 defaults and per-user by dovecot-auth. | |
| 214 - dotlock overriding is racy, but it's pretty difficult to fix it. Also | |
| 215 overriding someone else's dotlock in shared folder isn't possible. These | |
| 216 could be fixed by having separate lock process running as root, which | |
| 217 would chown() the file for another uid and then unlink() it as that user. | |
| 218 One problem with that is that if malicious user sets setuid+execute bits | |
| 219 on for the file, he could run the file and get changed to the new uid. | |
| 220 That hopefully shouldn't matter much since the new uid should be user | |
| 221 with minimum possible privileges. Anyway, optional.. | |
| 222 - things break if next_uid gets to 2^32 | |
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223 |
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224 capabilities: |
| 4449 | 225 - preferrably all should be implemented as plugins |
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226 - possibility to disable them from config file |
| 3087 | 227 - THREAD=ORDEREDSUBJECT - although pretty useless I'd think. |
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228 - acl (rfc2086, draft-ietf-imapext-acl), namespace (rfc2342) |
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229 - probably do it like cyrus. "user.<username>" to access other |
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230 users, with "" defaulting to "user.<myself>". these should be |
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231 configurable however. |
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232 - shared namespaces? maybe configurable in config file |
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233 - easiest way to do ACL would be to use unix modes, but is that |
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234 useful at all? Well, ACL2 has a bit better support for that, so |
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235 maybe we could support it. |
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236 - otherwise gets a bit trickly, we could keep all mail in "imapmail" |
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237 group and 0600/0700 mode by default, but when mail is shared to others, |
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238 the group read/write access bits would be set. or alternatively we |
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239 could launch another imap process to handle it, which we should support |
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240 anyway. ACLs could be stored into ".acl" ascii file in each folder. |
| 480 | 241 - support for private and shared flags, configurable by mailbox admin. |
| 242 this isn't in any draft yet, but ACL2 author was going to create one. | |
| 243 [SHAREDFLAGS (...)] would specify which ones are shared, don't know yet | |
| 244 how they would be configured. | |
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245 - id (rfc2971) |
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246 - must be configurable what gets sent, default to only name=Dovecot |
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247 - separate pre/post-login settings |
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248 - optionally log configured parts of the client information, but only |
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249 once, probably at the same time as logging "Logged in", |
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250 "Disconnected", etc. |
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251 - remember to force truncating values longer than 30 chars, |
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252 especially before logging |
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253 - mailbox-referrals (rfc2193) |
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254 - this is useful whenever we would otherwise need to make the |
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255 connection ourself. for example load balancing and shared mailboxes |
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256 requiring another UID to run. |
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257 - this rfc defines no exact way for server to detect if client |
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258 supports referrals or not. I don't think there's much point in |
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259 supporting only referrals, as most clients don't support them. |
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260 Instead we should return referrals when we know that client |
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261 supports them, otherwise do the connecting ourself. If client |
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262 issues RLIST or RLSUB command, it's safe to assume it supports |
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263 referrals. |
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264 - for load balancing this works just fine, but what about shared |
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265 mailboxes which require different UID? If we login with our own |
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266 username, we end up with our own UID instead of what we wanted. |
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267 IMAP URLs don't support separated authorization id which would |
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268 have made this very easy.. We could give the "userid@group" as |
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269 userid, but clients probably treat it as different userid and |
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270 ask the password again. |
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271 - problems, problems, .. maybe not worth the trouble. |
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272 - drafts: |
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273 - http://www.imc.org/ids.html |
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274 - annotate (draft-ietf-imapext-annotate) |
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275 - per-message annotations. this will be major change. especially |
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276 because currently there's no suitable storage for them, and |
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277 they'll probably change all the time.. maybe if we moved into |
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278 berkeley db to store the .data file and these annotations. |
| 1178 | 279 - this is separate problem from index files. indexes are treated as |
| 280 temporary files, annotations are permanent data. we'd have to | |
| 281 support non-db way to do this too, which would probably be just a | |
| 282 simple (slow) text file. | |
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283 - annotatemore (draft-daboo-imap-annotatemore) |
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284 - server and per-mailbox annotations. much easier than |
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285 per-message annotations, but they'd be easier to place into |
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286 db as well. |
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287 - binary (draft-nerenberg-imap-binary) |
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288 - perhaps not too useful. I'd like to make Dovecot fully |
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289 binary-safe though. |
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290 - view (draft-ietf-imapext-view) |
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291 - slow, complex, luckily draft expired almost two years ago. |
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292 i hope i don't have to implement this :) |
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293 - can be done client-side just fine (evolution's virtual folders) |