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Refactor connection_or_client_learned_peer_id for bug18812

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No behavioural change.
Also clarify some comments.
This commit is contained in:
teor (Tim Wilson-Brown) 2016-06-28 14:12:18 +10:00
parent 87134db57c
commit 14b1c7a66e
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GPG key ID: 450CBA7F968F094B
1 changed files with 16 additions and 3 deletions
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19
src/or/connection_or.c
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@ -1698,9 +1698,14 @@ connection_or_check_valid_tls_handshake(or_connection_t *conn,
* or renegotiation. For v3 handshakes, this is right after we get a
* certificate chain in a CERTS cell.
*
* If we want any particular ID before, record the one we got.
* If we did not know the ID before, record the one we got.
*
* If we wanted an ID, but we didn't get it, log a warning and return -1.
* If we wanted an ID, but we didn't get the one we expected, log a message
* and return -1.
* On relays:
* - log a protocol warning whenever the fingerprints don't match;
* On clients:
* - if a relay's fingerprint doesn't match, log a warning;
*
* If we're testing reachability, remember what we learned.
*
@ -1711,7 +1716,6 @@ connection_or_client_learned_peer_id(or_connection_t *conn,
const uint8_t *peer_id)
{
const or_options_t *options = get_options();
int severity = server_mode(options) ? LOG_PROTOCOL_WARN : LOG_WARN;
if (tor_digest_is_zero(conn->identity_digest)) {
connection_or_set_identity_digest(conn, (const char*)peer_id);
@ -1736,6 +1740,15 @@ connection_or_client_learned_peer_id(or_connection_t *conn,
base16_encode(seen, sizeof(seen), (const char*)peer_id, DIGEST_LEN);
base16_encode(expected, sizeof(expected), conn->identity_digest,
DIGEST_LEN);
int severity;
if (server_mode(options)) {
severity = LOG_PROTOCOL_WARN;
} else {
/* a relay has changed its fingerprint from the one in the consensus */
severity = LOG_WARN;
}
log_fn(severity, LD_HANDSHAKE,
"Tried connecting to router at %s:%d, but identity key was not "
"as expected: wanted %s but got %s.",