CHANGES

Polipo 1.0.5 (unreleased)

  * Fixed a bug that could cause incorrect logging to syslog (thanks
    to Sami Farin).
  * Proper va_list handling for AMD64 and other RISC-like
    architectures on non-GNU platforms.
  * Implemented work-around for broken Content-Range headers.
  * Use 1024 instead of 32 as the length of the listen queue.
  * Implemented the ability to control the permissions set on the log file.
  * Implemented the ability to scrub private information from logs.
  * Tweaked the portable version of mktime_gmt.  This will hopefully
    fix the time issues on Windows.  Thanks to MaxWell and Greg.
  * Changed chunk allocator to use larger arenas on 64-bit arches.
  * Fixed a bug that could prevent saving objects on disk.  Thanks to
    Ming Fu.
  * Fixed an issue that could cause crash messages to go into the disk
    cache.
  * Fixed a bug that could cause the default chunk memory to be incorrect
    on FreeBSD machines.  Thanks to Frank Behrens.
  * Fixed a number of bugs in the validation of Range requests.  Thanks to
    Ken Brazier.
  * Inhibited range requests for non-200 instances, as this breaks some
    client software.  Thanks to Ken Brazier.
  * Fix a integer overflow in processing client requests.
  * Fixed a crash that occurs when a server sends a malformed
    Cache-Control: header (CVE-2009-3305). Thanks to Stefan Fritsch.
  * Changed the default value of diskCacheWriteoutOnClose to 64kB.
  * Cleaned up naming of Windows support functions. Thanks to Honglei Jiang.
  * Added support for forbidden tunnels (thanks to Richard Zidlicky).

31 January 2010: Polipo 1.0.4.1:

  Cherry-picked fixes from 1.0.5.  Thanks to Julien Cristau.

  * Fixed an integer overflow that may lead to a crash
    (http://secunia.com/advisories/37607/). Discovered by Jeremy Brown.
    (CVE-2009-4413)
  * Fixed a crash that occurs when a server sends a malformed
    Cache-Control: header (CVE-2009-3305). Patch from Stefan Fritsch.
  * Prevent an infinite loop when a bodyless 204 or 1xx response is encountered
  * Don't crash when we get an error while waiting for 100 continue status.

8 January 2008: Polipo 1.0.4:

  * Fixed the handling of tunnels with a parent proxy (thanks to
    Richard Šputa).
  * Fixed a bug that could cause connections to be shut down when
    a server used the old (RFC 2068) semantics of ``100 Continue''
    (thanks to Thomas Wiesel).
  * Fixed a crash when a request URL was larger than 10 kB (thanks to
    Fabian Keil).
  * Fixed a possible failure to read client requests larger than one
    chunk.

6 October 2007: Polipo 1.0.3

  * Changed the default for chunkMemory: it is now 24 MB or
    one-quarter of physical memory, whichever is smaller.
  * Support for logging to syslog (thanks to Nix).
  * Made atom reference counts 32-bit longs; this should fix
    problems that people were seeing when running Polipo with
    humongous in-memory caches.
  * Added Git, Jabber and CVS to default tunnelAllowedPorts.
  * Fixed a bug that could cause URL matching to fail when using
    anchored regular expressions (thanks to phuel).

26 August 2007: Polipo 1.0.2:

  * Fixed a crash that could happen with entities more than 2GB in
    size.  Such entities are still not supported, but Polipo
    should no longer crash.
  * Minor HTTP compliance fixes, due to testing with Co-Advisor.
  * Fixed a crash that would happen when a POST request was aborted
    by the server.  Reported by Tero Pelander.
  * Worked around a DNS-related bug that I'm unable to track down,
    waiting for a proper fix.

25 June 2007: Polipo 1.0.1:

  * Made Polipo slightly more aggressive when speaking to
    HTTP/1.0 servers (thanks to Fabian Keil for noticing that).
  * Fixed a crash that would happen when a client used
    Cache-Control: only-if-cached, and the object was not in cache.
    (Reported by F. Zappa, A. Patala and V. Ghosal.)
  * Fixed a descriptor leak when running under Windows.
  * Made Polipo optionally drop connections after servicing
    a number of connections (maxConnectionAge and maxConnectionRequests).

6 March 2007: Polipo 1.0.0

  * No changes since 0.9.99.2.

7 February 2007: Polipo 0.9.99.2

  * Fixed a buffer overflow in urlDirname (the 0.9 branch is not
    vulnerable) (reported by J. P. Larocque).
  * Implemented use of IPv6 temporary source addresses (Frank Behrens).
  * Disabled use of unaligned range requests by default.  This is
    controlled by the variable allowUnalignedRangeRequests (reported
    by Chris Moore).
  * Fixed descriptor leaks in SOCKS error handling (reported by
    Roger Dingledine).
  * Implemented maxSideBuffering.

6 February 2007: Polipo 0.9.12

  * Fixed incorrect caching of redirects (reported by Lawrence Lu).
  * Fixed a possible hang when falling back to gethostbyname
    (reported by Chris Moore).

28 December 2006: Polipo 0.9.99.1

  * Validation improvements and bug fixes.
  * Don't use cached data when receiving the output from an HTTP/1.0 CGI.
  * Allowed tunnelling of IMAP and POP traffic by default.
  * Changed the disk cache expiry and indexing functions to use chunks.
  * Made the disk cache unreadable by others by default.
  * Fixed a bug that could cause stale data to be served after
    a connection failure (reported by Hondza).
  * Fixed computation of age and rtt for pipelined requests.
  * Fixed incorrect cachability of redirects (reported by J.-P. Larocque).
  * Fixed a bug that would cause uncachable objects to become
    cachable after being reloaded from the on-disk cache (reported
    by J.-P. Larocque).
  * Implemented dontTrustVaryETag.

7 December 2006: Polipo 0.9.11

  * Fixed a crash that could happen when a network interface went down
    while a DNS query was in progress (reported by Francesco Zappa).

20 November 2006: Polipo 0.9.99.0:

  * Implemented large buffers for headers larger than a chunk's worth.
  * Made the HTTP parser lax by default (ignores unknown headers).
  * Implemented the infrastructure for local POST requests and
    implemented a real configuration interface (thanks to Theo Honohan).
  * Made timeouts user-configurable and enforced an invariant between
    timeouts.
  * Made logging configurable at runtime (thanks to Frank Behrens).
  * Implemented the infrastructure for asynchronous handling of 
    forbidden URLs.
  * Implemented the ability to redirect instead of returning an
    error for forbidden URLs.
  * Implemented support for Squid-style redirectors.
  * Implemented User-configurable uncacheable URLs, analogous to
    forbidden URLs (thanks to Joachim Haga).
  * Implemented the ability to avoid caching pages with cookies
    and redirects.
  * Implemented maxPipelineTrain, which can be used to moderate
  * Polipo's eagerness to pipeline.
  * Unified parentHost and parentPort into parentProxy.
  * Ported Polipo to native Windows (thanks to Dan Kennedy).
  * Implemented disableVia.
  * Implemented SOCKS support.
  * Made disableVia and cacheIsShared to be true by default.
  * Increased the default value of serverMaxSlots to 8.
  * Made the disk cache code quote all characters except for a
    small number of ``known safe'' ones.  This is an incompatible
    change to the on-disk format.
  * Changed HTTP parser to pass all Pragma headers to the next
    hop; this should make some media players work through Polipo.
  * Changed the connection scheduler to avoid pipelining when
    there are idle connections to a given server.
  * Made Polipo obey parentProxy when tunnelling (proxying https).
  * Changed the default value of allowedPorts to be slightly more
    permissive.
  * Implemented tweakables for selectively disabling parts of the
    configuration interface.  Indexing and listing known servers
    are now disabled by default.
  * Hide variables containing passwords.
  * Fixed a bug that could cause incorrect validation when speaking
    to an HTTP/1.0 server.
  * Fixed a bug that could cause incorrect validation of Vary objects.
  * Fixed a crash in the redirector code.
  * Made disableVia the default, and changed the default value of idleTime.
  * Made polipo delay serving of partial objects until after a
    a successful validation.  This should fix Mozilla's prefetching.
  * On 64-bit platforms, made CHUNK_SIZE default to 8kB.

2 September 2006: Polipo 0.9.10:

  * Fixed a crash when a client closes a connection at just the
    wrong time.
  * Fixed a crash that could happen when a server returned incorrect
    headers and closed the connection at just the wrong time.
  * Fixed restarting of connections on a server-side read error;
    this should avoid the ``connection reset by peer'' problem.
  * Corrected work-around for DNS servers that export both AAAA and CNAME.
  * Fix incorrect error handling when overflowing the buffer when saving
    an entity to disk.
  * IPv6 tweaks for OpenBSD (thanks to Jun-ichiro itojun Hagino).
  * Fixed incorrect error-handling on failure to parse a date.
  * Fixed a deadlock when a tunnel is shut down and the buffer is
    full.
  * Fixed an incorrect use of va_start (guaranteed crash on AMD64).
  * Fixed a possible race condition with a heavily pipelining client.
  * Fixed a crash due to incorrect handling of write errors in POST.

23 September 2005: Polipo 0.9.9:

  * Fixed a bug that could cause objects to be incorrectly
    determined to be dynamic (thanks to Joachim B. Haga).
  * Fixed a bug that could cause the local web server to expose
    files that are not under the local root (thanks to Wessel
    Dankers).
  * Fixed an off-by-one bug when parsing NL-terminated headers.
  * Made Polipo forget about failures when finishing on the client side.
  * Polipo now sends Host headers even when speaking to an upstream
    proxy.  Some proxies take RFC 2616 literally, and require that
    (thanks to Zoltan Ivanfi).
  * Fixed some bugs in staleness computation, and implemented
    server-side max-age directives (oops!) (thanks to Charley Chu).

24 January 2005: Polipo 0.9.8:

  * Backported the lax HTTP parser from the head branch.
  * Fixed a race condition that could cause a crash if a single
    object was being superseded twice at the same time.
  * Fixed an incorrect test that caused Polipo to pipeline to all
    HTTP/1.1 servers, even when they were determined as broken (thanks
    to Daniel Koukola).
  * Implemented maxPipelineTrain.
  * Tweaked for uclibc (thanks to Detlef Riekenberg).

27 December 2004: Polipo 0.9.7:

  * Fixed a possible crash when tunnelling.
  * Fixed spurious updates of object sizes when connection is dropped
    by the client.
  * Fixed parsing of URLs with explicit port number (thanks to
    Frank Behrens).
  * Fixed a possible crash when exiting POST in error.
  * Fixed a protocol violation when an empty object is not superseded.

31 October 2004: Polipo 0.9.6:
  * Fixed a possible crash in ServeObject.
  * Fixed two possible crashes when relaxTransparency is not false.
  * Modified the config file parser to make it possible to have
    backslashes in atoms.
  * Fixed a violated invariant (leading to a crash) when superseding
    objects.
  * Fixed a possible crash in ClientFinish when a pipelined request
    carries no object.
  * Fixed a bug in handling of client-side Expect: 100-continue
    (reported by Charley Chu).
  * Fixed a scheduling bug that caused server-side requests to be
    issued in the order opposite to a client-side pipeline (many
    thanks to Joachim Haga).
  * Abort when the config file couldn't be parsed (thanks to
    Joachim Haga).
  * Fixed error handling in POST and PUT requests, which could
    cause a crash on an I/O error.

17 June 2004: Polipo 0.9.5:
  * Implemented upstream proxy authentication (HTTP Basic only).
  * Fixed a possible crash when unable to schedule servicing a request.
  * Fixed a possible crash when tunnelling (proxying https).
  * Fixed signedness issues to make allowedClients work on PPC
    (from Gergely Nagy).

10 May 2004: Polipo 0.9.4:
  * Fixed a bug (introduced in 0.9.3) that could cause a crash when
    the download of an object was interrupted and then immediately restarted.
  * Fixed a bug that could cause stale non-200 replies to be served.
  * Fixed compilation on FreeBSD 5.2.1 (from Samuel Tardieu).
  * Fixed definition of *_ROOT in diskcache.c

6 April 2004: Polipo 0.9.3:
  * Fix incorrect handling of EPIPE when tunnelling; this could cause
    crashes if a peer closed a connection when we're writing.
  * Fix a race condition that could cause ``error message lost in transit''
    errors if a request was cancelled during connect.
  * Check for exitFlag in workToDo: faster reaction to signals.

28 March 2004: Polipo 0.9.2:
  * Fixed a bug that could cause crashes when writing out small
    objects (thanks to Frank Behrens).
  * Made buffer allocation in httpParseHeaders dynamic.
  * Fixed the declaration of pipelineAdditionalRequests.
  * Fixed a bug that could cause empty directories to be missed
    when expiring the disk cache.
  * Switched the forbidden file to use extended regexps, the
    previous usage was non-portable (thanks to Frank Behrens).

9 March 2004: Polipo 0.9.1:
  * Fixed a bug that could cause chunked encoding failures when
    going from a 1.0 server to a 1.1 client.
  * Fixed a bug that prevented comments after some config lines
    (thanks to Tom Huckstep).
  * Fixed a possible buffer overflow in dnsDecodeReply.
  * Fixed portability to systems where rmdir returns EEXIST
    instead of ENOTEMPTY.
  * Fixed error handling on fork failures in fillSpecialObject.
  * Fixed handling of EINTR in wait in specialRequestHandler.
  * Fixed a bug that caused objects with no headers to fail.
  * Fixed a minor memory leak in the config file parser.
  * Minor build fixes for NetBSD.
  * Added the 68020 and later to the list of architectures that
    support unaligned access.

18 February 2004: Polipo 0.9:
  * Reworked the DNS code to parse ids even when a reply's qdcount
    is 0.  No longer falls back to gethostbyname when DNS server
    returns FormErr.
  * Made the DNS code parse resolv.conf.

11 Feburary 2004: Polipo 0.8.99.3:
  * Minor changes to work around Cygwin mis-design.
  * Fixed printing of n-state variables.
  * Fixed proxyOffline handling.
  * Fixed a bug that would cause errors to be reported with the
    wrong content-type.
  * Fixed a bug that would cause ``object vanished'' errors when
    using HEAD for revalidation.
  * Fixed a bug that could cause failed requests due to ``client
    reset connection'' errors.

24 January 2004: Polipo 0.8.99.2:
  * Cleaned up authentication.
  * Made authenticated replies cachable in one of the cases allowed
    by RFC 2616.
  * Fixed a bug that could, under some circumstances, cause a
    password-protected object to be cached and returned to a
    non-authorized client.
  * Implemented 100-continue, controlled by the variable expectContinue.
  * Implemented tristate, 4- and 5-state variables.  Split
    proxyOffline into proxyOffline and relaxTransparency.  This is
    an incompatible change to the config file format.
  * Cleaned up the handling of allowed port ranges.  New
    configuration variable allowedPorts (and new type intlist).
  * Implemented tunnelling through the CONNECT method (https proxying).
  * Will now read a request body on error (avoids a deadlock).
  * Reworked the PUT/POST code to read the reply eagerly rather
    than waiting for the write to finish (avoids writing the full
    body on error and avoids the same deadlock as above).
  * Made server addresses sticky: will now remember which of a
    servers addresses worked last time, and use that address first.

16 january 2004: Polipo 0.8.99.1:
  * Fixed an expiry bug that caused DNS queries to be repeated on
    each request.
  * Added the variable ``preciseExpiry'' that prevents trusting
    the mtime during expiry.

14 January 2004: Polipo 0.8.99.0:
  * Implemented IP address-based authentication.
  * Implemented HTTP ``basic'' authentication.
  * Implemented variable body offsets for the on-disk cache; this
    makes the on-disk cache format incompatible with previous versions.
  * Made the number of server slots configurable.
  * Partially rewrote the disk cache code.
  * Fixed a file descriptor leak in the early error handling code.
  * Fixed a bug in the base64 encoder; this makes the on-disk cache
    format incompatible with previous versions.
  * Implemented proper reporting for 100-Continue replies
    (100-Continue is not implemented yet).
  * Made the number of server slots configurable at runtime.

9 January 2004: Polipo 0.8.4:
  * Log file is now line buffered.
  * Will reopen the log file on SIGUSR1 and SIGUSR2.
  * censoredHeaders now defaults to none, and censorReferer to 0.
  * Fixed a memory allocation bug that could cause a crash.

21 December 2003: Polipo 0.8.3:
  * Fixed a potential buffer overflow on C89 systems in snnprintf.
  * Fixed checking of Via headers.
  * Added configurable log file.
  * Added code to run as a daemon.
  * Made the resolver grok names ending in a ``.''.
  * Changed Makefile to fit Debian better.

7 December 2003: Polipo 0.8.2:
  * Implemented a version of fts for SVR4 systems.
  * Implemented a version of mktime_gmt that doesn't use setenv.
  * Fixed code used to determine FQDN.
  * More unaligned access fixes.
  * Disabled queryIPv6 when there is no IPv6 support in kernel.
  * Enabled IPv6 support by default on FreeBSD and NetBSD.

2 December 2003: Polipo 0.8.1:

  * Fix a possible crash when doing a POST on a busy server.
  * Fix a possible crash when socket(2) fails; implement switching
    to a different address when socket(2) fails (e.g. when
    accessing a double-stack host from an IPv4-only client).
  * Fix a problem with servers stuck in the ``probing'' state.
  * Work around a bug in Konqueror that strips question marks from
    URLs.
  * Fix incorrect error handling when dealing with connection
    failures.
  * Fix a compile problem in dns.c.
  * Remove dependency on SSL, include MD5 code instead.
  * Fix signedness of s_maxage.

23 November 2003: Polipo 0.8:

  * IPv6 support, on both the client and server side, including
    DNS support and RFC 2732.
  * Reworked the DNS code.
  * Made it possible to compile without any particular resolver
    and without the on-disk cache.
  * Fixed a problem with the chunking encoder.
  * Made the config file parser grok octal and hex values, allowed
    colons and tildes in unquoted strings.
  * Implemented tilde expansion in some config variables.
  * Made Polipo slightly less eager to honour range requests for
    dynamic instances.  Marked generated objects as dynamic. These
    changes should solve some of the problems with PMM.
  * Implemented the If-Range header (on both the client and server side).
  * Implemented support for range requests smaller than one chunk
    (and hence for pmmSize being smaller than CHUNK_SIZE).
  * Fixed a bug that caused a deadlock (until a server timeout)
    when doing a POST/PUT request with no free connection slots.
  * Fixed a problem when diskCacheRoot didn't end in `/'.
  * Fixed a refcounting problem that could cause Polipo to crash
    on a DNS timeout.
  * Fixed an alignment problem that could cause crashes on 
    architectures that don't like unaligned memory accesses
    (thanks to Rob Byrnes).
  * Fixed a bug with the disk cache that caused spurious ``disk
    entry changed behind our back'' warnings (and in principle
    could cause data corruption, although that's very unlikely).
  * Made opening connections slightly less aggressive -- Polipo
    would sometimes open two connections where only one was needed.
  * Modified client-side code to notice client shutdowns earlier
    and notify the server side straight away.

7 October 2003: Polipo 0.7

  * Made the Request function a method of objects.
  * Fixed a bug that could sometimes cause data corruption.
  * Fixed a bug that could cause sending of incorrect data to
    the client on a range request.
  * Fixed POST and PUT requests.
  * Fixed a bug that could sometimes cause a POST request to use a
    stale connection.
  * Included code to do poor man's multiplexing.
  * Will now open multiple connections to non-persistent servers.
  * Fixed a bug that could lead to idle connections dying without
    being noticed.
  * Fixed probing for pipelining.
  * Actually use the new time function introduced in 0.5.
  * Fixed a bug in strcasecmp_n.
  * forbiddenFile can now be a directory.

26 September 2003: Polipo 0.6

  * Fixed precondition handling.
  * Fixed a bug that could lead to lockups when revalidating an object.

27 June 2003: Polipo 0.5

  * Made the presence of a reader or writer explicit on the client side.
  * Reworked closing client connections.
  * Reworked reporting of server-side errors.
  * Made buffer allocation lazy; idle clients and servers no longer
    use up buffers.
  * Reworked UTC time handling to use timegm(3) when available.

12 March 2003: Polipo 0.4

  * Implemented expiry of the on-disk cache.
  * Implemented reliable aborting of connections; Polipo should no
  * longer deadlock when a server falls into a black hole.
  * Changed direct reads to be more aggressive by using readv in
    three pieces.
  * Changed serving of chunked data to be more eager about
    serving a chunk's end marker.
  * Implemented better reporting of DNS errors.
  * Fixed a deadlock with pipelining on the client side.
  * Removed most of the remaining copies when reading on the
  * server side.
  * Fixed a bug that caused some headers to disappear in transit.
  * Fixed a possible livelock when reading chunked encoding.
  * Fixed an overflow when pipelining on the server side.
  * Fixed generation of indexes from the on-disk cache.
  * Fixed a DNS crash when falling back on gethostbyname.

1 March 2003: Polipo 0.3

  * Implemented retrying of timed-out DNS requests.
  * Implemented configuration mechanisms for case-insensitive atoms,
    time values and atom lists; censoredHeaders can now be configured.
  * No longer censors User-Agent.  Blame Beppe and Alain.
  * Changed the handling of hop-by-hop HTTP headers to deal with multiple
    Connection headers.
  * Made client-side errors and successful revalidation no longer
    close the connection.
  * Fixed a bug that caused the allocation of an extraneous 2MB (!)
    at startup.  Polipo can run in 100KB once again.
  * Fixed a refcounting bug and some incorrect frees that could
    lead to crashes when recovering from a server-side error.
  * Fixed a bug with POST/PUT that could trigger a failed assertion.
  * Made sure that POST/PUT don't get scheduled in multiple pieces.

17 February 2003: Polipo 0.2

  * Fixed an incorrect assertion that could cause crashes when the
    server is fast.
  * Fixed (hopefully) logic for 304 replies.
  * Minor tweaks to scheduling that cause some speed increase when the
    client is pipelining and the server is fast.
  * Minor bug fixes and cleanups.
  * Macro-ified do_log and friends.

3 February 2003: Polipo 0.1

  * Initial public release.