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[mptcp-next,v3,5/8] mptcp: infinite mapping receiving

Message ID 27849702bc924bbab7ca914387e18b6dadfe5622.1631610729.git.geliangtang@gmail.com (mailing list archive)
State Superseded, archived
Headers show
Series The infinite mapping support | expand

Commit Message

Geliang Tang Sept. 14, 2021, 9:19 a.m. UTC 
This patch added the infinite mapping receiving logic. When the infinite
mapping is received, set the map_data_len of the subflow to 0.

In subflow_check_data_avail, only reset the subflow when the map_data_len
of the subflow is non-zero.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
---
 net/mptcp/subflow.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 89173f70707e..fd44996a7b9a 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -968,6 +968,7 @@  static enum mapping_status get_mapping_status(struct sock *ssk,
 	data_len = mpext->data_len;
 	if (data_len == 0) {
 		MPTCP_INC_STATS(sock_net(ssk), MPTCP_MIB_INFINITEMAPRX);
+		subflow->map_data_len = 0;
 		return MAPPING_INVALID;
 	}
 
@@ -1180,7 +1181,7 @@  static bool subflow_check_data_avail(struct sock *ssk)
 			return true;
 		}
 
-		if (subflow->mp_join || subflow->fully_established) {
+		if ((subflow->mp_join || subflow->fully_established) && subflow->map_data_len) {
 			/* fatal protocol error, close the socket.
 			 * subflow_error_report() will introduce the appropriate barriers
 			 */