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att_db: use ATT_DEFAULT_MTU as minimum after MTU exchange

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This commit is contained in:
Matthias Ringwald 2020-02-16 14:56:43 +01:00
parent bba538e52d
commit d60453d1ae
1 changed files with 4 additions and 6 deletions
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10
src/ble/att_db.c
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@ -364,12 +364,10 @@ static uint16_t handle_exchange_mtu_request(att_connection_t * att_connection, u
uint16_t client_rx_mtu = little_endian_read_16(request_buffer, 1);
// find min(local max mtu, remote mtu) and use as mtu for this connection
if (client_rx_mtu < att_connection->max_mtu){
att_connection->mtu = client_rx_mtu;
} else {
att_connection->mtu = att_connection->max_mtu;
}
// find min(local max mtu, remote mtu) >= ATT_DEFAULT_MTU and use as mtu for this connection
uint16_t min_mtu = btstack_min(client_rx_mtu, att_connection->max_mtu);
uint16_t new_mtu = btstack_max(ATT_DEFAULT_MTU, min_mtu);
att_connection->mtu = new_mtu;
response_buffer[0] = ATT_EXCHANGE_MTU_RESPONSE;
little_endian_store_16(response_buffer, 1, att_connection->mtu);