FuzzedSock only supports peeking at one byte at a time, which is not
fuzzer friendly when trying to receive long data.
Fix this by supporting peek data of arbitrary length instead of only one
byte.
In the process of doing so, refactor `ConsumeNetAddr()` to generate the
addresses from IPv4, IPv6, Tor, I2P and CJDNS networks in the same way -
by preparing some random stream and deserializing from it. Similar code
was already found in `RandAddr()`.
7df4508369 test: improve sock_tests/move_assignment (Vasil Dimov)
5086a99b84 net: remove Sock default constructor, it's not necessary (Vasil Dimov)
7829272f78 net: remove now unnecessary Sock::Get() (Vasil Dimov)
944b21b70a net: don't check if the socket is valid in ConnectSocketDirectly() (Vasil Dimov)
aeac68d036 net: don't check if the socket is valid in GetBindAddress() (Vasil Dimov)
5ac1a51ee5 i2p: avoid using Sock::Get() for checking for a valid socket (Vasil Dimov)
Pull request description:
_This is a piece of #21878, chopped off to ease review._
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 where appropriate or outright remove such checks where they are not necessary.
The default constructor `Sock::Sock()` is unnecessary now after recent changes, thus remove it.
ACKs for top commit:
ajtowns:
ACK 7df4508369
jonatack:
ACK 7df4508369
Tree-SHA512: 9742aeeeabe8690530bf74caa6ba296787028c52f4a3342afd193b05dbbb1f6645935c33ba0a5230199a09af01c666bd3c7fb16b48692a0d185356ea59a8ddbf
This also cleans up the addrman (de)serialization code paths to only
allow `Disk` serialization. Some unit tests previously forced a
`Network` serialization, which does not make sense, because Bitcoin Core
in production will always `Disk` serialize.
This cleanup idea was suggested by Pieter Wuille and implemented by Anthony
Towns.
Co-authored-by: Pieter Wuille <pieter@wuille.net>
Co-authored-by: Anthony Towns <aj@erisian.com.au>
0eeb9b0442 [fuzz] Move ConsumeNetAddr to fuzz/util/net.h (dergoegge)
291c8697d4 [fuzz] Make ConsumeNetAddr produce valid onion addresses (dergoegge)
c9ba3f836e [netaddress] Make OnionToString public (dergoegge)
Pull request description:
The chance that the fuzzer is able to guess a valid onion address is probably slim, as they are Base32 encoded and include a checksum. Right now, any target using `ConsumeNetAddr` would have a hard time uncovering bugs that require valid onion addresses as input.
This PR makes `ConsumeNetAddr` produce valid onion addresses by using the 32 bytes given by the fuzzer as the pubkey for the onion address and forming a valid address according to the torv3 spec.
ACKs for top commit:
vasild:
ACK 0eeb9b0442
brunoerg:
ACK 0eeb9b0442
Tree-SHA512: 7c687a4d12f9659559be8f0c3cd4265167d1261d419cfd3d503fd7c7f207cc0db745220f02fb1737e4a5700ea7429311cfc0b42e6c15968ce6a85f8813c7e1d8
