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l2cap-ertm: add mtu option to ertm config request/response

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This commit is contained in:
Matthias Ringwald 2017-11-29 11:39:11 +01:00
parent eb3c94dfe2
commit d64e9771b3
1 changed files with 15 additions and 7 deletions
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22
src/l2cap.c
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@ -379,7 +379,7 @@ static int l2cap_ertm_send(l2cap_channel_t * channel, uint8_t * data, uint16_t l
}
static uint16_t l2cap_setup_options_ertm_request(l2cap_channel_t * channel, uint8_t * config_options){
config_options[0] = 0x04; // RETRANSMISSION AND FLOW CONTROL OPTION
config_options[0] = L2CAP_CONFIG_OPTION_TYPE_RETRANSMISSION_AND_FLOW_CONTROL;
config_options[1] = 9; // length
config_options[2] = (uint8_t) channel->mode;
config_options[3] = channel->num_rx_buffers; // == TxWindows size
@ -388,14 +388,18 @@ static uint16_t l2cap_setup_options_ertm_request(l2cap_channel_t * channel, uint
little_endian_store_16( config_options, 7, channel->local_monitor_timeout_ms);
little_endian_store_16( config_options, 9, channel->local_mps);
//
config_options[11] = 0x05; // FCS OPTION
config_options[11] = L2CAP_CONFIG_OPTION_TYPE_FRAME_CHECK_SEQUENCE;
config_options[12] = 1; // length
config_options[13] = channel->fcs_option;
return 14;
//
config_options[14] = L2CAP_CONFIG_OPTION_TYPE_MAX_TRANSMISSION_UNIT;
config_options[15] = 2; // length
little_endian_store_16(config_options, 16, channel->local_mtu);
return 18;
}
static uint16_t l2cap_setup_options_ertm_response(l2cap_channel_t * channel, uint8_t * config_options){
config_options[0] = 0x04; // RETRANSMISSION AND FLOW CONTROL OPTION
config_options[0] = L2CAP_CONFIG_OPTION_TYPE_RETRANSMISSION_AND_FLOW_CONTROL;
config_options[1] = 9; // length
config_options[2] = (uint8_t) channel->mode;
// less or equal to remote tx window size
@ -411,10 +415,14 @@ static uint16_t l2cap_setup_options_ertm_response(l2cap_channel_t * channel, uin
// less or equal to remote mps
little_endian_store_16( config_options, 9, btstack_min(channel->local_mps, channel->remote_mps));
//
config_options[11] = 0x05; // FCS OPTION
config_options[11] = L2CAP_CONFIG_OPTION_TYPE_FRAME_CHECK_SEQUENCE;
config_options[12] = 1; // length
config_options[13] = channel->fcs_option;
return 14;
//
config_options[14] = L2CAP_CONFIG_OPTION_TYPE_MAX_TRANSMISSION_UNIT; // MTU
config_options[15] = 2; // length
little_endian_store_16(config_options, 16, channel->remote_mtu);
return 18;
}
static int l2cap_ertm_send_supervisor_frame(l2cap_channel_t * channel, uint16_t control){
@ -1193,7 +1201,7 @@ uint16_t l2cap_max_le_mtu(void){
#ifdef ENABLE_CLASSIC
static uint16_t l2cap_setup_options_mtu(uint8_t * config_options, uint16_t mtu){
config_options[0] = 1; // MTU
config_options[0] = L2CAP_CONFIG_OPTION_TYPE_MAX_TRANSMISSION_UNIT; // MTU
config_options[1] = 2; // len param
little_endian_store_16(config_options, 2, mtu);
return 4;