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75 Commits

Author SHA1 Message Date
Péter Szilágyi eafdc1f8e3 eth, eth/downloader: surface downloaded block origin, drop on error 2015-05-26 14:00:21 +03:00
Péter Szilágyi 06a041589f eth, eth/downloader: remove duplicate consts, bump hash fetch to 2K 2015-05-21 18:16:04 +03:00
Péter Szilágyi 52db6d8be5 eth/downloader: circumvent a forged block chain with known parent attack 2015-05-21 08:37:27 +03:00
Péter Szilágyi e8b22b9253 eth/downloader: prevent a peer from dripping bad hashes 2015-05-21 08:07:58 +03:00
obscuren c2ef8682fe eth/downloader: moved start event 
Start event has moved because it could possibly could stall the miner
 2015-05-16 13:02:30 +02:00
Péter Szilágyi f3ae8f50a5 eth/downloader: circumvent download race between crosscheck and hashes 2015-05-15 20:54:10 +03:00
Péter Szilágyi 4f0d88cb02 eth/downloader: fix cancel channel double close 2015-05-15 19:43:42 +03:00
Péter Szilágyi 5c1a7b965c eth/downloader: circumvent a fake blockchain attack 2015-05-15 15:04:15 +03:00
Péter Szilágyi b517967f86 eth/downloader: don't penalize for stale cross checks 2015-05-15 15:03:08 +03:00
Péter Szilágyi 83226762c2 eth, eth/downloader: detect and handle madeup hash attacks 2015-05-15 15:01:58 +03:00
Péter Szilágyi 72411eb24c eth/downloader: circumvent hash reordering attacks 2015-05-15 15:01:58 +03:00
Péter Szilágyi bcc2980179 eth/downloader: check sync after failed attacks 2015-05-15 15:01:58 +03:00
Péter Szilágyi 366e9627e8 eth/downloader: add a test for detecting missing blocks 2015-05-15 15:01:58 +03:00
Péter Szilágyi cd2fb09051 eth, eth/downloader: prevent hash repeater attack 2015-05-15 15:01:58 +03:00
obscuren b71091e337 eth, eth/downloader, miner: use download events to check miner start 2015-05-15 00:43:10 +02:00
Jeffrey Wilcke 060a07cf69 Merge pull request #974 from karalabe/downloader-fix-unknown-parent-attack 
eth, eth/downloader: handle a potential unknown parent attack
 2015-05-14 08:16:30 -07:00
Péter Szilágyi ebf1eb9359 eth/downloader: remove a previous leftover 2015-05-14 15:40:28 +03:00
Péter Szilágyi 3eda70c64c eth, eth/downloader: remove parent verification from the downlaoder 2015-05-14 15:38:49 +03:00
Péter Szilágyi a4246c2da6 eth, eth/downloader: handle a potential unknown parent attack 2015-05-14 15:24:18 +03:00
Jeffrey Wilcke 2b06fe3eff Merge pull request #950 from karalabe/downloader-cancel-sync 
eth/downloader: fix deliveries to check for sync cancels
 2015-05-14 04:05:13 -07:00
Péter Szilágyi 910a6d4e46 eth/downloader: fix nil panic caused by wrong variable use 2015-05-13 17:25:01 +03:00
Péter Szilágyi de3a71cafd eth/downloader: remove a redundant sync progress check 2015-05-13 16:56:01 +03:00
Péter Szilágyi 48ee0777a5 eth/downloader: add a user sync notificaton 2015-05-13 16:03:05 +03:00
Péter Szilágyi ec57aa64cd eth/downloader: sync the cancel channel during cancel too 2015-05-13 14:01:08 +03:00
Péter Szilágyi ee0c892303 eth/downloader: fix deliveries to check for sync cancels 2015-05-13 13:47:21 +03:00
Péter Szilágyi d2d5dbc6fb eth/downloader: fix active peer shadowing, polish func names 2015-05-13 13:13:43 +03:00
obscuren 48bd48876c eth, eth/downloader: moved pending queue error message to debug 2015-05-11 17:27:34 +02:00
Péter Szilágyi 064cf16099 eth/downloader: use count instead of peers, clearer 2015-05-11 17:21:22 +02:00
Péter Szilágyi d37a2559b9 eth/downloader: revert to demotion, use harsher penalty 2015-05-11 17:21:22 +02:00
Péter Szilágyi 70c65835f4 eth/downloader: fix #910, thread safe peers & polishes 2015-05-11 17:21:22 +02:00
obscuren 05715f27cf eth: added a cancel method for the downloader 
Added a cancel method to the downloader which gracefully shuts down any
active syncing process (hash fetching or block downloading) and resets
the queue and remove any pending blocks.

Issue with the downloader which would stall because of an active ongoing
process when an invalid block was found.
 2015-05-10 00:34:07 +02:00
Péter Szilágyi edad47bf0e eth/downloader: fix leftover state between syncs 2015-05-08 17:39:03 +03:00
Péter Szilágyi bd5720f480 eth, eth/downloader: handle sync errors a bit more gracefully 2015-05-08 15:22:48 +03:00
Péter Szilágyi 9d188f73b5 eth, eth/downloader: make synchronize thread safe 2015-05-07 21:07:20 +03:00
Péter Szilágyi 45f8304f3c eth/downloader: fix expiration not running while fetching 2015-05-07 12:59:19 +03:00
Péter Szilágyi 4800c94392 eth/downloader: prioritize block fetch based on chain position, cap memory use 2015-05-07 10:57:34 +03:00
obscuren 1470b22e90 downloader: hash downloading recovery 
If a peer fails to respond (disconnect, etc) during hash downloading
switch to a different peer which has it's current_hash in the queue's
peer set.
 2015-05-03 16:27:03 +02:00
obscuren 493181ea09 eth/downloader: changed has to blockHashes for chain linking 2015-05-03 14:10:31 +02:00
obscuren 016f152b36 eth, eth/downloader: Moved block processing & graceful shutdown 
The downloader is no longer responsible for processing blocks. The
eth-protocol handler now takes care of this instead.

Added graceful shutdown during block processing. Closes #846
 2015-05-01 15:58:44 +02:00
obscuren 8595198c1b eth/downloader: delete blocks from queue 2015-04-30 17:51:47 +02:00
obscuren 9b6e8f6195 eth, eth/downloader: remove bad peers from peer set 
Peers in the eth protocol handler are now being ignored for catch up.
 2015-04-30 12:38:16 +02:00
obscuren f8c27d7159 eth/downloader: drop block 2015-04-29 19:55:04 +02:00
obscuren dfbf580354 eth/downloader: ignore orphan blocks in the downloader. 
When blocks have been sorted and are being processed, orphan blocks
should be ignored and thrown out. The protocol handler is responsible
for downloading blocks which have missing parents.
 2015-04-29 14:49:37 +02:00
obscuren 735b029db9 core: return the index of the block that failed when inserting a chain 2015-04-29 14:00:24 +02:00
obscuren 13364a2dcf eth/downloader: reset the chain when parent is missing during processing 2015-04-29 13:40:39 +02:00
obscuren 4b7bdc3766 eth: check if downloader is busy before showing log message 2015-04-29 12:51:05 +02:00
obscuren 7ce3d06402 eth/downloader: removed update loop and synch channel 2015-04-24 18:28:46 +02:00
obscuren d84c2202e7 eth, eth/downloader: simplified synchronisation process 2015-04-24 15:38:10 +02:00
obscuren 31f82eb334 eth, eth/downloader: don't require td on downloader. Fixed tests 2015-04-24 15:04:58 +02:00
obscuren b86e7526e1 eth, eth/downloader: moved peer selection to protocol handler 2015-04-24 14:40:32 +02:00