Try to make max_dl_per_request a bit smarter (ac9b0a31) · Commits · The Tor Project / Core / Tor

src/or/routerlist.c

+11 −7

Original line number	Diff line number	Diff line
		@@ -4358,21 +4358,25 @@ MOCK_IMPL(STATIC void, initiate_descriptor_downloads,
		tor_free(resource);
		}

		/** Max amount of hashes to download per request.
		* Since squid does not like URLs >= 4096 bytes we limit it to 96.
		* 4096 - strlen(http://255.255.255.255/tor/server/d/.z) == 4058
		* 4058/41 (40 for the hash and 1 for the + that separates them) => 98
		* So use 96 because it's a nice number.
		/** Return the max number of hashes to put in a URL for a given request.
		*/
		static int
		max_dl_per_request(const or_options_t *options, int purpose)
		{
		/* Since squid does not like URLs >= 4096 bytes we limit it to 96.
		* 4096 - strlen(http://255.255.255.255/tor/server/d/.z) == 4058
		* 4058/41 (40 for the hash and 1 for the + that separates them) => 98
		* So use 96 because it's a nice number.
		*/
		int max = 96;
		if (purpose == DIR_PURPOSE_FETCH_MICRODESC) {
		max = 92;
		}
		if (options->TunnelDirConns) {
		max = 1000;
		/* If we're going to tunnel our connections, we can ask for a lot more
		* in a request. */
		if (options->TunnelDirConns &&
		!directory_fetches_from_authorities(options)) {
		max = 500;
		}
		return max;
		}