From https://geti2p.net/en/docs/api/samv3:
If SILENT=false was passed, which is the default value, the SAM bridge
sends the client a ASCII line containing the base64 public destination
key of the requesting peer
So, `Accept()` is supposed to receive a Base64 encoded destination of
the connecting peer, but if it receives something like this instead:
STREAM STATUS RESULT=I2P_ERROR MESSAGE="Session was closed"
then destroy the session.
Peeking at the underlying socket file descriptor of `Sock` and checkig
if it is `INVALID_SOCKET` is bad encapsulation and stands in the way of
testing/mocking/fuzzing.
Instead use an empty unique_ptr to denote that there is no valid socket.
Since the kernel library no longer depends on the system file, move it
to the common library instead in accordance to the diagram in
doc/design/libraries.md.
This is an extraction of ArgsManager related functions from util/system
into their own common file.
Config file related functions are moved to common/config.cpp.
The background of this commit is an ongoing effort to decouple the
libbitcoinkernel library from the ArgsManager. The ArgsManager belongs
into the common library, since the kernel library should not depend on
it. See doc/design/libraries.md for more information on this rationale.
The fs.* files are already part of the libbitcoin_util library. With the
introduction of the fs_helpers.* it makes sense to move fs.* into the
util/ directory as well.
3c1de032de i2p: use consistent number of tunnels with i2pd and Java I2P (Vasil Dimov)
801b405f85 i2p: lower the number of tunnels for transient sessions (Vasil Dimov)
b906b64eb7 i2p: reuse created I2P sessions if not used (Vasil Dimov)
Pull request description:
* Reuse an I2P transient session instead of discarding it if we failed to connect to the desired peer. This means we never used the generated address (destination), whose creation is not cheap. This does not mean that we will use the same address for more than one peer.
* Lower the number of tunnels for transient sessions.
* Explicitly specify the number of tunnels for persistent sessions instead of relying on the defaults which differ between I2P routers. This way we get consistent behavior with all routers.
Alleviates: https://github.com/bitcoin/bitcoin/issues/26754
(I have not tested this with i2pd, yet)
ACKs for top commit:
jonatack:
ACK 3c1de032de
mzumsande:
Light ACK 3c1de032de
Tree-SHA512: 477b4b9a5755e6a9a46bc0f7b268fa419dff4414e25445c750ae913f7552d9e2313f2aca4e3b70067b8390c2d0c2d68ec459f331765e939fc84139e454031cd4
c9d548c91f net: remove CService::ToStringPort() (Vasil Dimov)
fd4f0f41e9 gui: simplify OptionsDialog::updateDefaultProxyNets() (Vasil Dimov)
96c791dd20 net: remove CService::ToString() use ToStringAddrPort() instead (Vasil Dimov)
944a9de08a net: remove CNetAddr::ToString() and use ToStringAddr() instead (Vasil Dimov)
043b9de59a scripted-diff: rename ToStringIP[Port]() to ToStringAddr[Port]() (Vasil Dimov)
Pull request description:
Before this PR we had the somewhat confusing combination of methods:
`CNetAddr::ToStringIP()`
`CNetAddr::ToString()` (duplicate of the above)
`CService::ToStringIPPort()`
`CService::ToString()` (duplicate of the above, overrides a non-virtual method from `CNetAddr`)
`CService::ToStringPort()`
Avoid [overriding non-virtual methods](https://github.com/bitcoin/bitcoin/pull/25349/#issuecomment-1185226396).
"IP" stands for "Internet Protocol" and while sometimes "IP addresses" are called just "IPs", it is incorrect to call Tor or I2P addresses "IPs". Thus use "Addr" instead of "IP".
Change the above to:
`CNetAddr::ToStringAddr()`
`CService::ToStringAddrPort()`
The changes touch a lot of files, but are mostly mechanical.
ACKs for top commit:
sipa:
utACK c9d548c91f
achow101:
ACK c9d548c91f
jonatack:
re-ACK c9d548c91f only change since my previous reviews is rebase, but as a sanity check rebased to current master and at each commit quickly re-reviewed and re-verified clean build and green unit tests
LarryRuane:
ACK c9d548c91f
Tree-SHA512: 633fb044bdecf9f551b5e3314c385bf10e2b78e8027dc51ec324b66b018da35e5b01f3fbe6295bbc455ea1bcd1a3629de1918d28de510693afaf6a52693f2157
Both methods do the same thing, so simplify to having just one.
`ToString()` is too generic in this case and it is unclear what it does,
given that there are similar methods:
`ToStringAddr()` (inherited from `CNetAddr`),
`ToStringPort()` and
`ToStringAddrPort()`.
"IP" stands for "Internet Protocol".
"IP address" is sometimes shortened to just "IP" or "address".
However, Tor or I2P addresses are not "IP addresses", nor "IPs".
Thus, use "Addr" instead of "IP" for addresses that could be IP, Tor or
I2P addresses:
`CService::ToStringIPPort()` -> `CService::ToStringAddrPort()`
`CNetAddr::ToStringIP()` -> `CNetAddr::ToStringAddr()`
-BEGIN VERIFY SCRIPT-
sed -i 's/ToStringIPPort/ToStringAddrPort/g' -- $(git grep -l ToStringIPPort src)
sed -i 's/ToStringIP/ToStringAddr/g' -- $(git grep -l ToStringIP src)
-END VERIFY SCRIPT-
We generate our persistent I2P address with type `EdDSA_SHA512_Ed25519`
(`DEST GENERATE SIGNATURE_TYPE=7`).
Use the same type for our transient addresses which are created by the
`SESSION CREATE ...` command. If not specified, then the default one is
`DSA_SHA1` according to https://geti2p.net/en/docs/api/samv3.
Instead of providing our destination (private key) to the I2P proxy when
creating the session, ask it to generate one for us and do not save it
on disk.
Outside of `Sock`, `Sock::Reset()` was used in just one place (in
`i2p.cpp`) which can use the assignment operator instead.
This simplifies the public `Sock` API by having one method less.
6e68ccbefe net: use Sock::WaitMany() instead of CConnman::SocketEvents() (Vasil Dimov)
ae263460ba net: introduce Sock::WaitMany() (Vasil Dimov)
cc74459768 net: also wait for exceptional events in Sock::Wait() (Vasil Dimov)
Pull request description:
_This is a piece of #21878, chopped off to ease review._
`Sock::Wait()` waits for IO events on one socket. Introduce a similar `virtual` method `WaitMany()` that waits simultaneously for IO events on more than one socket.
Use `WaitMany()` instead of `CConnman::SocketEvents()` (and ditch the latter). Given that the former is a `virtual` method, it can be mocked by unit and fuzz tests. This will help to make bigger parts of `CConnman` testable (unit and fuzz).
ACKs for top commit:
laanwj:
Code review ACK 6e68ccbefe
jonatack:
re-ACK 6e68ccbefe per `git range-diff e18fd47 6747729 6e68ccb`, and verified rebase to master and debug build
Tree-SHA512: 917fb6ad880d64d3af1ebb301c06fbd01afd8ff043f49e4055a088ebed6affb7ffe1dcf59292d822f10de5f323b6d52d557cb081dd7434634995f9148efcf08f
Here we update only the log messages that manually print a category.
In upcoming commits, LogPrintCategory will likely be used in many
other cases, such as to replace `LogPrintf` where it makes sense.
Base32/base64 are mechanisms for encoding binary data. That they'd
decode to a string is just bizarre. The fact that they'd do that
based on the type of input arguments even more so.
There is no change in behavior. This just helps prepare for the
transition from boost::filesystem to std::filesystem by avoiding calls
to methods which will be unsafe after the transaction to std::filesystem
to due lack of a boost::filesystem::path::imbue equivalent and inability
to set a predictable locale.
Co-authored-by: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
Co-authored-by: Kiminuo <kiminuo@protonmail.com>
Co-authored-by: MarcoFalke <falke.marco@gmail.com>
When connecting to an I2P host we don't specify destination port and it
is being forced to 0 by the SAM 3.1 proxy, so if we connect to the same
host on two different ports, that would be actually two connections to
the same service (listening on port 0).
Fixes https://github.com/bitcoin/bitcoin/issues/21389
* When accepting an I2P connection, assume the peer has port 0 instead
of the default 8333 (for mainnet). It is not being sent to us, so we
must assume something.
* When deriving our own I2P listen CService use port 0 instead of the
default 8333 (for mainnet). So that we later advertise it to peers
with port 0.
In the I2P protocol SAM 3.1 and older (we use 3.1) ports are not used,
so they are irrelevant. However in SAM 3.2 and newer ports are used and
from the point of view of SAM 3.2, a peer using SAM 3.1 seems to have
specified port=0.
Change the types of `i2p::Connection::sock` and
`i2p::sam::Session::m_control_sock` from `Sock` to
`std::unique_ptr<Sock>`.
Using pointers would allow us to sneak `FuzzedSock` instead of `Sock`
and have the methods of the former called.
After this change a test only needs to replace `CreateSock()` with
a function that returns `FuzzedSock`.
Change `ConnectSocketDirectly()` to take a `Sock` argument instead of a
bare `SOCKET`. With this, use the `Sock`'s (possibly mocked) methods
`Connect()`, `Wait()` and `GetSockOpt()` instead of calling the OS
functions directly.
Put a limit on the amount of data `Sock::RecvUntilTerminator()` can read
if no terminator is received.
In the case of I2P this avoids a runaway (or malicious) I2P proxy
sending us tons of data without a terminator before a timeout is
triggered.
Implement the following commands from the I2P SAM protocol:
* HELLO: needed for all of the remaining ones
* DEST GENERATE: to generate our private key and destination
* NAMING LOOKUP: to convert .i2p addresses to destinations
* SESSION CREATE: needed for STREAM CONNECT and STREAM ACCEPT
* STREAM CONNECT: to make outgoing connections
* STREAM ACCEPT: to accept incoming connections
