highperfocused/bitcoin
1
0
Fork 0
mirror of https://github.com/bitcoin/bitcoin.git synced 2025-06-30 18:51:15 +02:00
Code Issues Packages Projects Releases Wiki Activity

Utilize anti-DoS headers download strategy

Browse Source 
Avoid permanently storing headers from a peer, unless the headers are part of a
chain with sufficiently high work. This prevents memory attacks using low-work
headers.

Designed and co-authored with Pieter Wuille.
This commit is contained in:
Suhas Daftuar
2022-02-09 09:38:52 -05:00
parent ed470940cd
commit 551a8d957c
9 changed files with 884 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
test/functional/p2p_dos_header_tree.py
View File

@ -22,6 +22,7 @@ class RejectLowDifficultyHeadersTest(BitcoinTestFramework):
self.setup_clean_chain = True
self.chain = 'testnet3' # Use testnet chain because it has an early checkpoint
self.num_nodes = 2
self.extra_args = [["-minimumchainwork=0x0"], ["-minimumchainwork=0x0"]]
def add_options(self, parser):
parser.add_argument(
@ -62,7 +63,7 @@ class RejectLowDifficultyHeadersTest(BitcoinTestFramework):
self.log.info("Feed all fork headers (succeeds without checkpoint)")
# On node 0 it succeeds because checkpoints are disabled
self.restart_node(0, extra_args=['-nocheckpoints'])
self.restart_node(0, extra_args=['-nocheckpoints', "-minimumchainwork=0x0"])
peer_no_checkpoint = self.nodes[0].add_p2p_connection(P2PInterface())
peer_no_checkpoint.send_and_ping(msg_headers(self.headers_fork))
assert {