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[tor-commits] [tor/release-0.4.6] hs: Send back 0xF6 for a v2 onion address



commit 301ffb71a695e89f2e4905e2260fce15439259f1
Author: David Goulet <dgoulet@xxxxxxxxxxxxxx>
Date:   Tue Jun 29 09:56:44 2021 -0400

    hs: Send back 0xF6 for a v2 onion address
    
    Fixes #40421
    
    Signed-off-by: David Goulet <dgoulet@xxxxxxxxxxxxxx>
---
 changes/ticket40421           | 3 +++
 src/core/or/connection_edge.c | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/changes/ticket40421 b/changes/ticket40421
new file mode 100644
index 0000000000..d2dcc5533d
--- /dev/null
+++ b/changes/ticket40421
@@ -0,0 +1,3 @@
+  o Minor bugfixes (onion service):
+    - Send back the extended SOCKS error 0xF6 for a v2 onion address. Fixes bug
+      40421; bugfix on 0.4.6.2-alpha.
diff --git a/src/core/or/connection_edge.c b/src/core/or/connection_edge.c
index a307249967..6f6f22a0d4 100644
--- a/src/core/or/connection_edge.c
+++ b/src/core/or/connection_edge.c
@@ -2536,6 +2536,10 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
                "https://blog.torproject.org/v2-deprecation-timeline.";);
       control_event_client_status(LOG_WARN, "SOCKS_BAD_HOSTNAME HOSTNAME=%s",
                                   escaped(socks->address));
+      /* Send back the 0xF6 extended code indicating a bad hostname. This is
+       * mostly so Tor Browser can make a proper UX with regards to v2
+       * addresses. */
+      conn->socks_request->socks_extended_error_code = SOCKS5_HS_BAD_ADDRESS;
       connection_mark_unattached_ap(conn, END_STREAM_REASON_TORPROTOCOL);
       return -1;
     }



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