linux-kernel - [PATCH V2 net-next 3/3] net: qrtr: Handle IPCR control port format of older targets

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Message-ID: <20230714055846.1481015-4-quic_viswanat@quicinc.com>
Date:   Fri, 14 Jul 2023 11:28:46 +0530
From:   Vignesh Viswanathan <quic_viswanat@...cinc.com>
To:     <mani@...nel.org>, <davem@...emloft.net>, <edumazet@...gle.com>,
        <kuba@...nel.org>, <pabeni@...hat.com>,
        <linux-arm-msm@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <quic_srichara@...cinc.com>, <quic_clew@...cinc.com>,
        Vignesh Viswanathan <quic_viswanat@...cinc.com>,
        Simon Horman <simon.horman@...igine.com>
Subject: [PATCH V2 net-next 3/3] net: qrtr: Handle IPCR control port format of older targets

The destination port value in the IPCR control buffer on older
targets is 0xFFFF. Handle the same by updating the dst_port to
QRTR_PORT_CTRL.

Signed-off-by: Vignesh Viswanathan <quic_viswanat@...cinc.com>
Reviewed-by: Simon Horman <simon.horman@...igine.com>
---
 net/qrtr/af_qrtr.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/qrtr/af_qrtr.c b/net/qrtr/af_qrtr.c
index 78beb74146e7..41ece61eb57a 100644
--- a/net/qrtr/af_qrtr.c
+++ b/net/qrtr/af_qrtr.c
@@ -23,6 +23,8 @@
 #define QRTR_EPH_PORT_RANGE \
 		XA_LIMIT(QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET)
 
+#define QRTR_PORT_CTRL_LEGACY 0xffff
+
 /**
  * struct qrtr_hdr_v1 - (I|R)PCrouter packet header version 1
  * @version: protocol version
@@ -495,6 +497,9 @@ int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len)
 		goto err;
 	}
 
+	if (cb->dst_port == QRTR_PORT_CTRL_LEGACY)
+		cb->dst_port = QRTR_PORT_CTRL;
+
 	if (!size || len != ALIGN(size, 4) + hdrlen)
 		goto err;
 
-- 
2.41.0