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net: mqtt: websocket: Only accept data packets in RX

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Check the message type and only accept MQTT binary data.

Fixes #24156

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit is contained in:
Jukka Rissanen 2020-04-08 12:42:46 +03:00
commit 1ecac129c8
1 changed files with 15 additions and 2 deletions
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17
subsys/net/lib/mqtt/mqtt_transport_websocket.c
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@ -141,13 +141,26 @@ int mqtt_client_websocket_read(struct mqtt_client *client, u8_t *data,
u32_t buflen, bool shall_block)
{
s32_t timeout = K_FOREVER;
u32_t message_type = 0U;
int ret;
if (!shall_block) {
timeout = K_NO_WAIT;
}
return websocket_recv_msg(client->transport.websocket.sock,
data, buflen, NULL, NULL, timeout);
ret = websocket_recv_msg(client->transport.websocket.sock,
data, buflen, &message_type, NULL, timeout);
if (ret > 0 && message_type > 0) {
if (message_type & WEBSOCKET_FLAG_CLOSE) {
return 0;
}
if (!(message_type & WEBSOCKET_FLAG_BINARY)) {
return -EAGAIN;
}
}
return ret;
}
int mqtt_client_websocket_disconnect(struct mqtt_client *client)