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[tor-commits] [snowflake/main] Fix error handling around transport.Dial.
commit 01a96c7d95bfcc6ec5b6a770c8a56ef7da6605f4
Author: David Fifield <david@xxxxxxxxxxxxxxx>
Date: Mon May 24 14:36:24 2021 -0600
Fix error handling around transport.Dial.
The code checked for and displayed an error, but would then go on to
call copyLoop on the nil Conn returned from transport.Dial. Add a return
in that case, and put the cleanup operations in defer. Also remove an
obsolete comment about an empty address. Obsolete because:
https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/merge_requests/31#note_2733279
---
client/snowflake.go | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/client/snowflake.go b/client/snowflake.go
index f19afcf..bacc389 100644
--- a/client/snowflake.go
+++ b/client/snowflake.go
@@ -69,17 +69,15 @@ func socksAcceptLoop(ln *pt.SocksListener, transport *sf.Transport, shutdown cha
handler := make(chan struct{})
go func() {
- // pass an empty address because the broker chooses the bridge
+ defer close(handler)
sconn, err := transport.Dial()
if err != nil {
log.Printf("dial error: %s", err)
+ return
}
+ defer sconn.Close()
// copy between the created Snowflake conn and the SOCKS conn
copyLoop(conn, sconn)
- sconn.Close()
- close(handler)
- return
-
}()
select {
case <-shutdown:
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