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limit l2cap mtu to hci_max_acl_data_packet_length minus 4

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This commit is contained in:
matthias.ringwald 2011-07-07 21:27:10 +00:00
parent 43bb3ff12c
commit fa8c92f61b
1 changed files with 8 additions and 4 deletions
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12
src/l2cap.c
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@ -389,6 +389,10 @@ void l2cap_run(void){
}
}
static uint16_t l2cap_max_l2cap_mtu(void){
return hci_max_acl_data_packet_length()-4; // 4 bytes for L2CAP header
}
// open outgoing L2CAP channel
void l2cap_create_channel_internal(void * connection, btstack_packet_handler_t packet_handler,
bd_addr_t address, uint16_t psm, uint16_t mtu){
@ -399,8 +403,8 @@ void l2cap_create_channel_internal(void * connection, btstack_packet_handler_t p
if (!chan) return;
// limit local mtu to max acl packet length
if (mtu > hci_max_acl_data_packet_length()) {
mtu = hci_max_acl_data_packet_length();
if (mtu > l2cap_max_l2cap_mtu()) {
mtu = l2cap_max_l2cap_mtu();
}
// fill in
@ -595,8 +599,8 @@ static void l2cap_handle_connection_request(hci_con_handle_t handle, uint8_t sig
channel->remote_sig_id = sig_id;
// limit local mtu to max acl packet length
if (channel->local_mtu > hci_max_acl_data_packet_length()) {
channel->local_mtu = hci_max_acl_data_packet_length();
if (channel->local_mtu > l2cap_max_l2cap_mtu()) {
channel->local_mtu = l2cap_max_l2cap_mtu();
}
// set initial state