Fix all but 2 DOCDOC items; defer many XXX020s (particularly those where fixing them would fix no bugs at the risk of introducing some bugs).
svn:r13529
Re-tune mempool parametes based on testing on peacetime: use smaller chuncks, free them a little more aggressively, and try very hard to concentrate allocations on fuller chunks. Also, lots of new documentation.
svn:r13484
Add a couple of (currently disabled) strategies for trying to avoid using too much ram in memory pools: prefer putting new cells in almost-full chunks, and be willing to free the last empty chunk if we have not needed it for a while. Also add better output to mp_pool_log_status to track how many mallocs a given memory pool strategy is saving us, so we can tune the mempool parameters.
svn:r13428
Fix some warnings identified by building with -D_FORTIFY_SOURCE=2. Remove a redundant (and nuts) definition of _FORTIFY_SOURCE from eventdns.c.
svn:r13424
Be more thorough about memory poisoning and clearing. Add an in-place version of aes_crypt in order to remove a memcpy from relay_crypt_one_payload.
svn:r13414
The SSL portion of the revised handshake now seems to work: I just finally got a client and a server to negotiate versions. Now to make sure certificate verification is really happening, connections are getting opened, etc.
svn:r13409
Add more documentation; change the behavior of read_to_buf_tls to be more consistent. Note a longstanding problem with current read/write interfaces.
svn:r13407
Write a new autoconf macro to test whether a function is declared. It is suboptimal and possibly buggy in some way, but it seems to work for me. use it to test for a declaration of malloc_good_size, so we can workaround operating systems (like older OSX) that have the function in their libc but do not deign to declare it in their headers. Should resolve bug 587.
svn:r13339
Add a reverse mapping from SSL to tor_tls_t*: we need this in order to do a couple of things the sensible way from inside callbacks. Also, add a couple of missing cases in connection_or.c
svn:r13040
Another test for the increasingly bad check-spaces style checker to check: #else\n#if is almost a sure sign of a failure to use #elif. Fortunately, we only did that 3 times.
svn:r13039
Push the strdups used for parsing configuration lines into parse_line_from_string(). This will make it easier to parse more complex value formats, which in turn will help fix bug 557
svn:r13020
Fix bug 575: protect the list of logs with a mutex. I couldn't find any appreciable change in logging performance on osx, but ymmv. You can undef USE_LOG_MUTEX to see if stuff gets faster for you.
svn:r13019
Use reference-counting to avoid allocating a zillion little addr_policy_t objects. (This is an old patch that had been sitting on my hard drive for a while.)
svn:r13017
New, slightly esoteric function, tor_malloc_roundup(). While tor_malloc(x) allocates x bytes, tor_malloc_roundup(&x) allocates the same size of chunk it would use to store x bytes, and sets x to the usable size of that chunk.
svn:r12981
Aaand, do the code to enable the client side of the new TLS handshake. There are some loose ends that need tying up in connection_or, and a lot of half-baked code to remove, and some special cases to test for, and lots and lots of testing to do, but that is what weekends are for.
svn:r12721
Change tor_addr_t to be a tagged union of in_addr and in6_addr, not of sockaddr_in and sockaddr_in6. It's hardly used in the main code as it is, but let's get it right before it gets popular.
svn:r12660
Add support to get a callback invoked when the client renegotiate a connection. Also, make clients renegotiate. (not enabled yet, until they detect that the server acted like a v2 server)
svn:r12623
Start getting freaky with openssl callbacks in tortls.c: detect client ciphers, and if the list doesn't look like the list current Tors use, present only a single cert do not ask for a client cert. Also, support for client-side renegotiation. None of this is enabled unless you define V2_HANDSHAKE_SERVER.
svn:r12622
Mess with the formula for the Guard flag again. Now it requires that you be in the most familiar 7/8 of nodes, and have above median wfu for that 7/8th. See spec for details. Also, log thresholds better.
svn:r12440
Make TLS contexts reference-counted, and add a reference from TLS objects to their corresponding context. This lets us reliably get the certificates for a given TLS connection, even if we have rotated TLS contexts.
svn:r12383
If setting our rlimit to rlim_max or cap fails, fall back to OPEN_FILES if defiled. This makes Tor run on OSX 10.5, while allowing OSX to mend its ways in the future.
svn:r12341
Improved skew reporting: "You are 365 days in the duture" is more useful than "You are 525600 minutes in the future". Also, when we get something that proves we are at least an hour in the past, tell the controller "CLOCK_SKEW MIN_SKEW=-3600" rather than just "CLOCK_SKEW"
svn:r12283
New code (disabled for now) to use the SSL context's cert store instead of using its "extra chain cert" list to get our identity certificate sent. This is a little close to what OpenSSL expects people to do, and it has the advantage that we should be able to keep the id cert from being sent by setting the NO_CHAIN_CERT bit. I have tried turning new code on, and it seemed to work fine.
svn:r12086
oprofile was telling me that a fair bit of our time in openssl was spent in base64_decode, so replace base64_decode with an all-at-once fairly optimized implementation. For decoding keys and digests, it seems 3-3.5x faster than calling out to openssl. (Yes, I wrote it from scratch.)
svn:r12002
Add a bunch of function documentation; clean up a little code; fix some XXXXs; tag the nonsensical EXTRAINFO_PURPOSE_GENERAL as nonsesnse; note another bit of "do not cache special routers" code to nuke.
svn:r11761
Re-optimize counter-mode: save about 15% on my core2 by (1) not regenerating the entire counter buffer every time we encrypt a block of keystream (2) using the platform-optimized htonl to convert to big-endian (It's a single instruction on 486 and later ) and (3) not even keeping a separate "counter" and "buffer" when the platform is big-endian. The third still needs testing.
svn:r11536
New (untested) code to implement AES-with-IV. Currently, IVs are generated randomly. Once tested, should be (almost) a drop-in replacement for the CBC functions.
svn:r11519
Switch our AES implementation from "128 bit counter with to 64 bits set to 0" to a proper implementation of counter mode. Also, add an aes_set_iv function to initialize the counter to a nonzero value.
svn:r11518
Refactor write_chunks_to_file_impl: break out the "pick a temporary name if it makes sense, and open the right filename" logic and the "close the file and unlink or rename if necessary" logic. This will let us write big files in a smarter way than "Build a big string" or "make a list of chunks", once we get around to using it.
svn:r11300
Add a new ClientDNSRejectInternalAddresses option (default: on) to refuse to believe that any address can map to or from an internal address. This blocks some kinds of potential browser-based attacks, especially on hosts using DNSPort. Also clarify behavior in some comments. Backport candiate?
svn:r11287
Glibc (and maybe others) define a mallinfo() that can be used to see how the platform malloc is acting inside. When we have it, dump its output on dumpmemusage().
svn:r10996
Cheesy attempt to break some censorware. Not a long-term fix, but it will be intersting to watch the epidemiology of the workarounds as the censors apply them.
svn:r10975
Another patch from croup: drop support for address masks that do not correspond to bit prefixes. Nobody has used this for a while, and we have given warnings for a long time.
svn:r10881
Patch from croup: rewrite the logic of get_next_token() to do the right thing with input that ends at weird places, or aligns with block boundaries after mmap. should fix bug 455. Needs fuzzing.
svn:r10847
