Clang needs to get its cctools path passed directly for the hid build to
succeed.
Make gperf a permanent external dependency.
Remove pcsc from depends.
26a42fe5 Added features to epee::span<T> : - Support for classes - Added `remove_prefix` function - Added `to_mut_span` and `as_mut_byte_span` (Lee Clagett)
56b50faa wallet: use wipeable_string in more places where a secret is used (moneromooo-monero)
07ec748c wipeable_string: add hex_to_pod function (moneromooo-monero)
42397359 Fixup 32bit arm build (TheCharlatan)
a06d2581 Fix Windows build (TheCharlatan)
ecaf5b3f Add libsodium to the packages, the arm build was complaining about it. (TheCharlatan)
cbbf4d24 Adapt translations to upstream changes (TheCharlatan)
db571546 Updated pcsc url (TheCharlatan)
f0ba19fd Add lrelease to the depends (TheCharlatan)
cfb30462 Add Miniupnp submodule (TheCharlatan)
5f7da005 Unbound is now a submodule. Adapt depends for this. (TheCharlatan)
d6b9bdd3 Update readmes to reflect the usage of depends (TheCharlatan)
56b6e41e Add support for apple and arm building (TheCharlatan)
29311fd1 Disable stack unwinding for mingw32 depends build. (TheCharlatan)
8db3d573 Modify depends for monero's dependencies (TheCharlatan)
0806a23a Initial depends addition (TheCharlatan)
4469b0c4 abstract_tcp_server2: fix binding to the wrong IP (moneromooo-monero)
8eab6147 epee: use the socket::bind variant which does not throw (moneromooo-monero)
Drop miniupnp and unbound depends builds. Make sure that build variables are propageted properly to unbound and miniupnp.
Rebase to after the v0.12 release
Add pcsc-lite to linux builds
Fixup windows icu4c linking with depends, the static libraries have an 's' appended to them
Compiling depends arm-linux-gnueabihf will allow you to compile armv6zk monero binaries
Add readline, ldns, graphviz, unbound to depends packages
Add a cmake toolchain file to depends that is uniquely created for every build and placed in triple/share/toolchain.cmake
This file is then passed to cmake with -DCMAKE_TOOLCHAIN_FILE=/path/to/triple/share/toolchain.cmake
Add the boost locale package to depends
In the depends cmake toolchain file, a DEPENDS flag is added
to exclude, or change cmake checks done that are required for depends
Link miniupnpc and unwind from depends and not external
Add libiconv and icu4c to depends, required for mingw32 builds.
Headers (winsock) need to be lower case in order to compile on unix systems.
This should not affect building on windows.
Depends cross compiles project dependencies for linux, mac and windows and multiple architectures.
Depends is original work by Cory Fields and used in bitcoin and a wide range of bitcoin related projects.
29dea03 epee: resize vectors where possible in serialization (moneromooo-monero)
76affd9 epee: some speedup in parsing (moneromooo-monero)
dc6c069 db_lmdb: speedup the get_output_distribution common case (moneromooo-monero)
76ac5a8 wallet2: ask for a binary output distribution, for speed (moneromooo-monero)
This class will allow mlocking small objects, of which there
may be several per page. It adds refcounting so pages are only
munlocked when the last object on that page munlocks.
The secret spend key is kept encrypted in memory, and
decrypted on the fly when needed.
Both spend and view secret keys are kept encrypted in a JSON
field in the keys file. This avoids leaving the keys in
memory due to being manipulated by the JSON I/O API.
f8dd433 epee: fix detection of 172.16.0.0/172.31.255.255 local IP range (moneromooo-monero)
5db9e3c unit_tests: add tests for local IP range detection (moneromooo-monero)
a connection's timeout is halved for every extra connection
from the same host.
Also keep track of when we don't need to use a connection
anymore, so we can close it and free the resource for another
connection.
Also use the longer timeout for non routable local addresses.
In file included from src/cryptonote_basic/hardfork.cpp:33:
In file included from src/blockchain_db/blockchain_db.h:42:
In file included from src/cryptonote_basic/hardfork.h:31:
contrib/epee/include/syncobj.h:37:10: fatal error: 'boost/thread/v2/thread.hpp' file not found
#include <boost/thread/v2/thread.hpp>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from src/rpc/daemon_handler.cpp:29:
In file included from src/rpc/daemon_handler.h:36:
In file included from src/p2p/net_node.h:41:
In file included from contrib/epee/include/net/levin_server_cp2.h:32:
In file included from contrib/epee/include/net/abstract_tcp_server2.h:324:
contrib/epee/include/net/abstract_tcp_server2.inl:44:10: fatal error: 'boost/thread/v2/thread.hpp' file not found
#include <boost/thread/v2/thread.hpp> // TODO
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
contrib/epee/include/math_helper.h: In member function 'bool epee::math_helper::average<val, default_base>::set_base()':
contrib/epee/include/syncobj.h:227:56: error: 'sleep_for' is not a member of 'boost::this_thread'
#define CRITICAL_REGION_LOCAL(x) {boost::this_thread::sleep_for(boost::chrono::milliseconds(epee::debug::g_test_dbg_lock_sleep()));} epee::critical_region_t<decltype(x)> critical_region_var(x)
^
contrib/epee/include/syncobj.h:227:56: note: in definition of macro 'CRITICAL_REGION_LOCAL'
#define CRITICAL_REGION_LOCAL(x) {boost::this_thread::sleep_for(boost::chrono::milliseconds(epee::debug::g_test_dbg_lock_sleep()));} epee::critical_region_t<decltype(x)> critical_region_var(x)
^~~~~~~~~
contrib/epee/include/syncobj.h:227:56: note: suggested alternative: 'sleep'
#define CRITICAL_REGION_LOCAL(x) {boost::this_thread::sleep_for(boost::chrono::milliseconds(epee::debug::g_test_dbg_lock_sleep()));} epee::critical_region_t<decltype(x)> critical_region_var(x)
^
contrib/epee/include/syncobj.h:227:56: note: in definition of macro 'CRITICAL_REGION_LOCAL'
#define CRITICAL_REGION_LOCAL(x) {boost::this_thread::sleep_for(boost::chrono::milliseconds(epee::debug::g_test_dbg_lock_sleep()));} epee::critical_region_t<decltype(x)> critical_region_var(x)
^~~~~~~~~
e4646379 keccak: fix mdlen bounds sanity checking (moneromooo-monero)
2e3e90ac pass large parameters by const ref, not value (moneromooo-monero)
61defd89 blockchain: sanity check number of precomputed hash of hash blocks (moneromooo-monero)
9af6b2d1 ringct: fix infinite loop in unused h2b function (moneromooo-monero)
8cea8d0c simplewallet: double check a new multisig wallet is multisig (moneromooo-monero)
9b98a6ac threadpool: catch exceptions in dtor, to avoid terminate (moneromooo-monero)
24803ed9 blockchain_export: fix buffer overflow in exporter (moneromooo-monero)
f3f7da62 perf_timer: rewrite to make it clear there is no division by zero (moneromooo-monero)
c6ea3df0 performance_tests: remove add_arg call stray extra param (moneromooo-monero)
fa6b4566 fuzz_tests: fix an uninitialized var in setup (moneromooo-monero)
03887f11 keccak: fix sanity check bounds test (moneromooo-monero)
ad11db91 blockchain_db: initialize m_open in base class ctor (moneromooo-monero)
bece67f9 miner: restore std::cout precision after modification (moneromooo-monero)
1aabd14c db_lmdb: check hard fork info drop succeeded (moneromooo-monero)
cb9aa23c levin_protocol_handler_async: another attempt at fixing at exception (moneromooo-monero)
64d23ce3 Revert "epee: keep a ref to a connection we're deleting" (moneromooo-monero)
bd5cce07 network_throttle: fix ineffective locking (moneromooo-monero)
e0a61299 network_throttle: remove unused xxx static member (moneromooo-monero)
24f584d9 cryptonote_core: remove unused functions with off by one bugs (moneromooo-monero)
b1634aa3 blockchain: don't leave dangling pointers in this (moneromooo-monero)
8e60b81c cryptonote_core: fix db leak on error (moneromooo-monero)
213e326c abstract_tcp_server2: log init_server errors as fatal (moneromooo-monero)
b51dc566 use const refs in for loops for non tiny types (moneromooo-monero)
f0568ca6 net_parse_helpers: fix regex error checking (moneromooo-monero)
b49ddc76 check accessing an element past the end of a container (moneromooo-monero)
2305bf26 check return value for generate_key_derivation and derive_public_key (moneromooo-monero)
a4240d9f catch const exceptions (moneromooo-monero)
45a1c4c0 add empty container sanity checks when using front() and back() (moneromooo-monero)
56fa6ce1 tests: fix a buffer overread in a unit test (moneromooo-monero)
b4524892 rpc: guard against json parsing a non object (moneromooo-monero)
c2ed8618 easylogging++: avoid buffer underflow (moneromooo-monero)
187a6ab2 epee: trap failure to parse URI from request (moneromooo-monero)
061789b5 checkpoints: trap failure to load JSON checkpoints (moneromooo-monero)
ba2fefb9 checkpoints: pass std::string by const ref, not const value (moneromooo-monero)
38c8f4e0 mlog: terminate a string at last char, just in case (moneromooo-monero)
d753d716 fix a few leaks by throwing objects, not newed pointers to objects (moneromooo-monero)
fe568db8 p2p: use size_t for arbitrary counters instead of uint8_t (moneromooo-monero)
46d6fa35 cryptonote_protocol: sanity check chain hashes from peer (moneromooo-monero)
25584f86 cryptonote_protocol: print peer versions when unexpected (moneromooo-monero)
490a5d41 rpc: do not try to use an invalid txid in relay_tx (moneromooo-monero)
43f5269f Wallets now do not depend on the daemon rpc lib (moneromooo-monero)
bb89ae8b move connection_basic and network_throttle from src/p2p to epee (moneromooo-monero)
4abf25f3 cryptonote_core does not depend on p2p anymore (moneromooo-monero)
Partially implements #74.
Securely erases keys from memory after they are no longer needed. Might have a
performance impact, which I haven't measured (perf measurements aren't
generally reliable on laptops).
Thanks to @stoffu for the suggestion to specialize the pod_to_hex/hex_to_pod
functions. Using overloads + SFINAE instead generalizes it so other types can
be marked as scrubbed without adding more boilerplate.
3dffe71b new wipeable_string class to replace std::string passphrases (moneromooo-monero)
7a2a5741 utils: initialize easylogging++ in on_startup (moneromooo-monero)
54950829 use memwipe in a few relevant places (moneromooo-monero)
000666ff add a memwipe function (moneromooo-monero)
27aa8ce9 net_utils_base: fix peer list parsing (moneromooo-monero)
fe5ab2c4 epee: fix kv_unserialize return value when a field is not found (moneromooo-monero)
Deleted 3 out of 4 calls to method connection_basic::sleep_before_packet
that were erroneous / superfluous, which enabled the elimination of a
"fudge" factor of 2.1 in connection_basic::set_rate_up_limit;
also ended the multiplying of limit values and numbers of bytes
transferred by 1024 before handing them over to the global throttle
objects
0d9c0db9 Do not build against epee_readline if it was not built (Howard Chu)
178014c9 split off readline code into epee_readline (moneromooo-monero)
a9e14a19 link against readline only for monerod and wallet-wallet-{rpc,cli} (moneromooo-monero)
437421ce wallet: move some scoped_message_writer calls from the libs (moneromooo-monero)
e89994e9 wallet: rejig to avoid prompting in wallet2 (moneromooo-monero)
ec5135e5 move input_line from command_line to simplewallet (moneromooo-monero)
082db75f move cryptonote command line options to cryptonote_core (moneromooo-monero)
This fixes linking when path to openssl
is defined manually:
cmake -DOPENSSL_ROOT_DIR='/usr/include/openssl-1.0;/usr/lib/openssl-1.0' ...
This is useful for building with OpenSSL v1.0
when default system installation is v1.1.
The linking error is undefined SSL_load_error_strings symbol.
This is due to -L /usr/lib/openssl-1.0 not making it onto
the linkline (so -lssl pulls in the default system openssl).
Fixes compile error when building with OpenSSL v1.1:
contrib/epee/include/net/net_helper.h: In member function ‘void epee::net_utils::blocked_mode_client::shutdown_ssl()’:
contrib/epee/include/net/net_helper.h:579:106: error: ‘SSL_R_SHORT_READ’ was not declared in this scope
if (ec.category() == boost::asio::error::get_ssl_category() && ec.value() != ERR_PACK(ERR_LIB_SSL, 0, SSL_R_SHORT_READ))
^
contrib/epee/include/net/net_helper.h:579:106: note: suggested alternative: ‘SSL_F_SSL_READ’
See boost/asio/ssl/error.hpp.
Boost handles differences between OpenSSL versions.
cmake: fail if Boost is too old for OpenSSL v1.1
The commands handler must not be destroyed before the config
object, or we'll be accessing freed memory.
An earlier attempt at using boost::shared_ptr to control object
lifetime turned out to be very invasive, though would be a
better solution in theory.
15e62581 connection_context: initialize m_callback_request_count to 0 (moneromooo-monero)
5fa199c6 copyable_atomic: add a ctor with initial value (moneromooo-monero)
- internal nullptr checks
- prevent modifications to network_address (shallow copy issues)
- automagically works with any type containing interface functions
- removed fnv1a hashing
- ipv4_network_address now flattened with no base class
792ba4f0 Log categories can now be added to and removed from (moneromooo-monero)
48f92eb6 easylogging++: add categories getter (moneromooo-monero)
f35afe62 epee: factor log level/categories setting (moneromooo-monero)
ef005f5e p2p: add a couple early outs when the stop signal is received (moneromooo-monero)
80d361c7 abstract_tcp_server2: improve tracking/cancelling of early connections (moneromooo-monero)
close might end up dropping a ref, ending up removing the
connection from m_connects, as the lock is recursive. This'd
cause an out of bounds exception and kill the idle connection
maker thread
df0cffed cryptonote_protocol: warn if we see a higher top version we expect (moneromooo-monero)
317ab21a cryptonote_protocol: less strict check on top version on connect (moneromooo-monero)
cc81a371 cryptonote_protocol: update target height when syncing too (moneromooo-monero)
e2ad372b cryptonote_protocol: simplify and remove unnecessary casts (moneromooo-monero)
727e67ca cryptonote_protocol: print peer top height along with its version (moneromooo-monero)
b5345ef4 crypto: use malloc instead of alloca (moneromooo-monero)
80794b31 thread_group: set thread size to THREAD_STACK_SIZE (moneromooo-monero)
5524bc31 print peer id in 0 padded hex for consistency (moneromooo-monero)
8f8cc09b contrib: add sync_info to rlwrap command set (moneromooo-monero)
70b8c6d7 cryptonote_protocol: misc fixes to the new sync algorithm (moneromooo-monero)
We don't actually need to keep them past the call to start, as this
adds them to the config object list, and so they'll then be cancelled
already when the stop signal arrives. This allows removing the periodic
call to cleanup connections.
b7d6ec83 simplewallet: add (out of sync) or (no daemon) markers in the prompt (moneromooo-monero)
fa23a500 wallet2: add a is_synced function (moneromooo-monero)
f1307bbd node_rpc_proxy: add a proxy for target height (moneromooo-monero)
5d4ef719 core: speed up output index unique set calculation (moneromooo-monero)
19d7f568 perf_timer: allow profiling more granular than millisecond (moneromooo-monero)
bda8c598 epee: add nanosecond timer and pause/restart profiling macros (moneromooo-monero)
dc0b312f wallet_rpc_server: optionally return tx blobs on transfer calls (moneromooo-monero)
5eb79983 epee: add a KV_SERIALIZE variant for optional parameters (moneromooo-monero)
A block queue is now placed between block download and
block processing. Blocks are now requested only from one
peer (unless starved).
Includes a new sync_info coommand.
Nanosecond timer precision won't work on Windows, but we don't
care since I'm using that just for profiling incremental code
paths, but a Windows coder is welcome to add it if there's a way.
This was the case for monero-wallet-cli already, but not for
monerod, which was making it pretty spammy as it was duplicating
intended output. Since my original intent was to ensure logs
included command output for debugging, this achieves both.
76043b17 monero-wallet-cli: hang on exit in readline code (#2117) (moneromooo-monero)
a73a42a6 monero-wallet-cli: hang on exit in readline code (#2117) (moneromooo-monero)
be9d4f04 Fix multiline wallet cli output with readline (Jethro Grassie)
readline_buffer: fix start/stop threads being starved by process
process could run for quite some time re-acquiring the process
lock, leaving start/stop starving. Yielding after unlock in
process is much better but doesn't seem to be enough to reliably
yield, so we sleep for a millisecond, which should be transparent
for user input anyway.
Signed-off-by: Jethro Grassie <jtg@xtrabass.com>
monero-wallet-cli commands which have multine output sometimes causes
issues with the readline support. This patch fixes show_transfers,
payments and incoming_transfers.
Existing tests: block, transaction, signature, cold outputs,
cold transaction.
Data for these is in tests/data/fuzz.
A convenience shell script is in contrib/fuzz_testing/fuzz.sh, eg:
contrib/fuzz_testing/fuzz.sh signature
The fuzzer will run indefinitely, ^C to stop.
Fuzzing is currently supported for GCC only. I can't get CLANG
to build Monero here as it dies on some system headers, so if
someone wants to make it work on both, that'd be great.
In particular, the __AFL_LOOP construct should be made to work
so that a given run can fuzz multiple inputs, as the C++ load
time is substantial.
07c4276c Don't issue a new timedsync while one is already in progress (Howard Chu)
cf3a376c Don't timeout a slow operation that's making progress (Howard Chu)
340830de Fix PR#2039 (Howard Chu)
It'd eat up a core constantly, due to spending its time jumping
back and forth between userland and kernel. We now wait for up
to a millisecond in kernel, which will be transparent to the user
and drop to idle most of the time.
This PR adds readline support to the daemon and monero-wallet-cli. Only
GNU readline is supported (e.g. not libedit) and there are cmake checks
to ensure this.
There is a cmake variable, Readline_ROOT_DIR that can specify a
directory to find readline, otherwise some default paths are searched.
There is also a cmake option, USE_READLINE, that defaults to ON. If set
to ON, if readline is not found, the build continues but without
readline support.
One negative side effect of using readline is that the color prompt in
the wallet-cli now has no color and just uses terminal default. I know
how to fix this but it's quite a big change so will tackle another time.
A timedsync is issued every minute on a connection, but the input
tineout is 2 minutes. This means a new sync request could be issued
while a slow sync request was already in progress. The additional
request will further clog the network on a slow connection, and
cause a premature timeout.
All code which was using ip and port now uses a new IPv4 object,
subclass of a new network_address class. This will allow easy
addition of I2P addresses later (and also IPv6, etc).
Both old style and new style peer lists are now sent in the P2P
protocol, which is inefficient but allows peers using both
codebases to talk to each other. This will be removed in the
future. No other subclasses than IPv4 exist yet.
- Performance improvements
- Added `span` for zero-copy pointer+length arguments
- Added `std::ostream` overload for direct writing to output buffers
- Removal of unused `string_tools::buff_to_hex`
Because some people just won't even try to read what is written
and freak out because the word FATAL is in here, despite the
context making it clear it's not an error.
8bdc86be protocol: speed up sync by minimizing duplicate work (moneromooo-monero)
61dfa310 epee: fix some log macros not printing context nicely (moneromooo-monero)
c02e1cb9 Updates to epee HTTP client code - http_simple_client now uses std::chrono for timeouts - http_simple_client accepts timeouts per connect / invoke call - shortened names of epee http invoke functions - invoke command functions only take relative path, connection is not automatically performed (Lee Clagett)
- http_simple_client now uses std::chrono for timeouts
- http_simple_client accepts timeouts per connect / invoke call
- shortened names of epee http invoke functions
- invoke command functions only take relative path, connection
is not automatically performed
using the MONERO_LOG_FORMAT environment variable.
Default is:
%datetime{%Y-%M-%d %H:%m:%s.%g}\t%thread\t%level\t%logger\t%loc\t%msg
Field list in easylogging++ documentation.
Don't forget to escape as needed.
This replaces the epee and data_loggers logging systems with
a single one, and also adds filename:line and explicit severity
levels. Categories may be defined, and logging severity set
by category (or set of categories). epee style 0-4 log level
maps to a sensible severity configuration. Log files now also
rotate when reaching 100 MB.
To select which logs to output, use the MONERO_LOGS environment
variable, with a comma separated list of categories (globs are
supported), with their requested severity level after a colon.
If a log matches more than one such setting, the last one in
the configuration string applies. A few examples:
This one is (mostly) silent, only outputting fatal errors:
MONERO_LOGS=*:FATAL
This one is very verbose:
MONERO_LOGS=*:TRACE
This one is totally silent (logwise):
MONERO_LOGS=""
This one outputs all errors and warnings, except for the
"verify" category, which prints just fatal errors (the verify
category is used for logs about incoming transactions and
blocks, and it is expected that some/many will fail to verify,
hence we don't want the spam):
MONERO_LOGS=*:WARNING,verify:FATAL
Log levels are, in decreasing order of priority:
FATAL, ERROR, WARNING, INFO, DEBUG, TRACE
Subcategories may be added using prefixes and globs. This
example will output net.p2p logs at the TRACE level, but all
other net* logs only at INFO:
MONERO_LOGS=*:ERROR,net*:INFO,net.p2p:TRACE
Logs which are intended for the user (which Monero was using
a lot through epee, but really isn't a nice way to go things)
should use the "global" category. There are a few helper macros
for using this category, eg: MGINFO("this shows up by default")
or MGINFO_RED("this is red"), to try to keep a similar look
and feel for now.
Existing epee log macros still exist, and map to the new log
levels, but since they're used as a "user facing" UI element
as much as a logging system, they often don't map well to log
severities (ie, a log level 0 log may be an error, or may be
something we want the user to see, such as an important info).
In those cases, I tried to use the new macros. In other cases,
I left the existing macros in. When modifying logs, it is
probably best to switch to the new macros with explicit levels.
The --log-level options and set_log commands now also accept
category settings, in addition to the epee style log levels.
5783dd8c tests: add unit tests for uri parsing (moneromooo-monero)
82ba2108 wallet: add API and RPC to create/parse monero: URIs (moneromooo-monero)
d9001b43 epee: add functions to convert from URL format (ie, %XX values) (moneromooo-monero)
When receiving an answer packet, the command code was passed
to the callback instead of the error code. This was hiding
the "command not found" failure from the peer, and in turn
causing the code to attempt to deserialize a non existent
reply string.
48b57d8 monero.supp: valgrind suppressions file (moneromooo-monero)
ffd8c41 ringct: check the size of amount_keys is the same as destinations (moneromooo-monero)
836669d ringct: always shutdown the boost io service (moneromooo-monero)
This is intended to catch traffic coming from a web browser,
so we avoid issues with a web page sending a transfer RPC to
the wallet. Requiring a particular user agent can act as a
simple password scheme, while we wait for 0MQ and proper
authentication to be merged.
Support building internal libraries as shared. This reduces
development time by eliminating the need to re-link all
binaries every time non-interface code in the library changes.
Instead, can hack on libxyz, then `make libxyz`, and re-run
monerod.
By default BUILD_SHARED_LIBS is OFF in release build type,
and ON in debug build type, but can be overriden with -D.
This adds [snap](https://snapcraft.io) packaging to the project. See the
link for more information on snaps. Snap packages install on all Linux
distributions. On Ubuntu, snap confinement with apparmor and seccomp
provide an additional layer of security.
This snap sets up monerod as a systemd service, which should start
immediately on install. To access the wallet CLI, simply run `monero`
(/snap/bin/monero). I think it's a really quick & easy way to get
started with monero.
I've made some opinionated decisions in the packaging just to kick this
off, but I'm happy to iterate on this stuff.
The noexcept specs were added to make GCC 6.1.1 happy (#846), but this
one was missing (because GCC did not complain about it on Linux, but
does complain on OSX).
5dc09f2 wallet_rpc_server: fix some string values being returned between <> (moneromooo-monero)
f8213c0 Require 64/16 characters for payment ids (moneromooo-monero)
The default behavior for hex string parsing would allow the
last digit to be made from a single hexadecimal character,
which is correct, but we typically do not want that as it
gets confusing and easy to not spot wrong input size.
The destructors get a noexcept(true) spec by default, but these
destructors in fact throw exceptions. An alternative fix might be to not
throw (most if not all of these throws are non-essential
error-reporting/logging).
1c0bffb Restrict also 'get_connections' and 'getbans' APIs. (osensei)
9f8bc49 Don't allow 'flush_txpool' and 'setbans' JSON_RPC methods when running in restricted mode. (osensei)
When the send queue limit is reached, it is likely to not drain
any time soon. If we call close on the connection, it will stay
alive, waiting for the queue to drain before actually closing,
and will hit that check again and again. Since the queue size
limit is the reason we're closing in the first place, we call
shutdown directly.
If we reach the send queue size limit, we need to release the lock,
or we will deadlock and it will never drain.
If we reach that limit, it's likely there's another problem in the
first place though, so it will probably not drain in practice either,
unless some kind of transient network timeout.
