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l2cap-ertm: extract l2cap_setup_options_mtu and l2cap_setup_options_ertm from l2cap_setup_options

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This commit is contained in:
Matthias Ringwald 2017-07-12 22:03:37 +02:00
parent ac8f130048
commit 450ad7ecde
1 changed files with 28 additions and 24 deletions
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38
src/l2cap.c
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@ -645,16 +645,15 @@ uint16_t l2cap_max_le_mtu(void){
return l2cap_max_mtu();
}
static uint16_t l2cap_setup_options(l2cap_channel_t * channel, uint8_t * config_options){
int send_retransmission_and_flow_control_option = 0;
int options_size;
#ifdef ENABLE_L2CAP_ENHANCED_RETRANSMISSION_MODE
// if (channel->mode == L2CAP_CHANNEL_MODE_ENHANCED_RETRANSMISSION){
send_retransmission_and_flow_control_option = 1;
// }
#endif
if (send_retransmission_and_flow_control_option){
static uint16_t l2cap_setup_options_mtu(l2cap_channel_t * channel, uint8_t * config_options){
config_options[0] = 1; // MTU
config_options[1] = 2; // len param
little_endian_store_16( (uint8_t*)&config_options, 2, channel->local_mtu);
return 4;
}
#ifdef ENABLE_L2CAP_ENHANCED_RETRANSMISSION_MODE
static uint16_t l2cap_setup_options_ertm(l2cap_channel_t * channel, uint8_t * config_options){
config_options[0] = 0x04; // RETRANSMISSION AND FLOW CONTROL OPTION
config_options[1] = 9; // length
config_options[2] = (uint8_t) channel->mode;
@ -663,15 +662,20 @@ static uint16_t l2cap_setup_options(l2cap_channel_t * channel, uint8_t * config_
little_endian_store_16( config_options, 5, 100); // Retransmission timeout: 100 ms
little_endian_store_16( config_options, 7, 300); // Monitor timeout: 300 ms
little_endian_store_16( config_options, 9, channel->local_mtu); // Max PDU size // TODO: use real MTU
options_size = 11;
#endif
} else {
config_options[0] = 1; // MTU
config_options[1] = 2; // len param
little_endian_store_16( (uint8_t*)&config_options, 2, channel->local_mtu);
options_size = 4;
return 11;
}
return options_size;
#endif
static uint16_t l2cap_setup_options(l2cap_channel_t * channel, uint8_t * config_options){
#ifdef ENABLE_L2CAP_ENHANCED_RETRANSMISSION_MODE
// use ERTM options if supported
hci_connection_t * connection = hci_connection_for_handle(channel->con_handle);
if ((connection->l2cap_state.information_state == L2CAP_INFORMATION_STATE_DONE) && (connection->l2cap_state.extended_feature_mask & 0x08)){
return l2cap_setup_options_ertm(channel, config_options);
}
#endif
return l2cap_setup_options_mtu(channel, config_options);
}
static uint32_t l2cap_extended_features_mask(void){