Check 'SSL_ERROR_ZERO_RETURN' for a closed SSL connection.

Barenboim · Barenboim · commit edb9081a057c · 2025-07-25T21:13:05.000+08:00
diff --git a/src/kernel/poller.c b/src/kernel/poller.c
@@ -453,10 +453,15 @@ static void __poller_handle_read(struct __poller_node *node,
 		else
 		{
 			nleft = SSL_read(node->data.ssl, p, POLLER_BUFSIZE);
-			if (nleft < 0)
+			if (nleft <= 0)
 			{
 				if (__poller_handle_ssl_error(node, nleft, poller) >= 0)
 					return;
+
+				if (errno == -SSL_ERROR_ZERO_RETURN)
+					nleft = 0;
+				else
+					nleft = -1;
 			}
 		}
 

Original file line number	Diff line number	Diff line change
`@@ -453,10 +453,15 @@ static void __poller_handle_read(struct __poller_node *node,`
`453`	`453`	`else`
`454`	`454`	`{`
`455`	`455`	`nleft = SSL_read(node->data.ssl, p, POLLER_BUFSIZE);`
`456`		`- if (nleft < 0)`
	`456`	`+ if (nleft <= 0)`
`457`	`457`	`{`
`458`	`458`	`if (__poller_handle_ssl_error(node, nleft, poller) >= 0)`
`459`	`459`	`return;`
	`460`	`+`
	`461`	`+ if (errno == -SSL_ERROR_ZERO_RETURN)`
	`462`	`+ nleft = 0;`
	`463`	`+ else`
	`464`	`+ nleft = -1;`
`460`	`465`	`}`
`461`	`466`	`}`
`462`	`467`