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r14103@tombo: nickm | 2008-02-10 13:40:09 -0500

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Fix some XXX020s in command.c, and make it not-allowed to negotiate v1 using the v2 connection protocol: it is too hard to test, and pointless to support.


svn:r13460
This commit is contained in:
Nick Mathewson 2008-02-10 18:40:29 +00:00
parent b5c03f05d8
commit ab0c85eea6
2 changed files with 17 additions and 3 deletions
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4
doc/spec/proposals/130-v2-conn-protocol.txt
View File

@ -173,6 +173,10 @@ Proposal:
The Data in the cell is a series of big-endian two-byte integers.
* It is not allowed to negotiate V1 conections once the v2 protocol
has been used. If this happens, Tor instances should close the
connection.
3. The rest of the "v2" protocol
Once a v2 protocol has been negotiated, NETINFO cells are exchanged

16
src/or/command.c
View File

@ -446,7 +446,10 @@ command_process_destroy_cell(cell_t *cell, or_connection_t *conn)
}
/** Process a 'versions' cell. The current link protocol version must be 0
* to indicate that no version has yet been negotiated. DOCDOC say more. */
* to indicate that no version has yet been negotiated. We compare the versions
* cell to the list of versions we support, and pick the highest version we
* have in common.
*/
static void
command_process_versions_cell(var_cell_t *cell, or_connection_t *conn)
{
@ -473,6 +476,12 @@ command_process_versions_cell(var_cell_t *cell, or_connection_t *conn)
"list in the VERSIONS cell; closing connection.");
connection_mark_for_close(TO_CONN(conn));
return;
} else if (highest_supported_version == 1) {
log_fn(LOG_PROTOCOL_WARN, LD_OR,
"Used version negotiation protocol to negotiate a v1 connection. "
"That's crazily non-compliant. Closing connection.");
connection_mark_for_close(TO_CONN(conn));
return;
}
conn->link_proto = highest_supported_version;
conn->handshake_state->received_versions = 1;
@ -568,9 +577,10 @@ command_process_netinfo_cell(cell_t *cell, or_connection_t *conn)
if (abs(apparent_skew) > NETINFO_NOTICE_SKEW &&
router_get_by_digest(conn->identity_digest)) {
char dbuf[64];
/*XXXX020 not always warn!*/
/*XXXX This should check the trustedness of the other side. */
int severity = server_mode(get_options()) ? LOG_INFO : LOG_WARN;
format_time_interval(dbuf, sizeof(dbuf), apparent_skew);
log_fn(LOG_WARN, LD_HTTP, "Received NETINFO cell with skewed time from "
log_fn(severity, LD_GENERAL, "Received NETINFO cell with skewed time from "
"server at %s:%d. It seems that our clock is %s by %s, or "
"that theirs is %s. Tor requires an accurate clock to work: "
"please check your time and date settings.",