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l2cap-ertm: handle fallback for optional ERTM

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This commit is contained in:
Matthias Ringwald 2017-07-12 12:56:01 +02:00
parent 45caebe58e
commit f2fa388d63
1 changed files with 13 additions and 10 deletions
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23
src/l2cap.c
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@ -1510,6 +1510,7 @@ static void l2cap_signaling_handle_configure_request(l2cap_channel_t *channel, u
if (option_type == 2 && length == 2){
channel->flush_timeout = little_endian_read_16(command, pos);
}
#ifdef ENABLE_L2CAP_ENHANCED_RETRANSMISSION_MODE
// Retransmission and Flow Control Option
if (option_type == 4 && length == 9){
@ -1534,10 +1535,11 @@ static void l2cap_signaling_handle_configure_request(l2cap_channel_t *channel, u
}
}
static void l2cap_signaling_handle_configure_response(l2cap_channel_t *channel, uint8_t *command){
static void l2cap_signaling_handle_configure_response(l2cap_channel_t *channel, uint8_t result, uint8_t *command){
log_info("l2cap_signaling_handle_configure_response");
#ifdef ENABLE_L2CAP_ENHANCED_RETRANSMISSION_MODE
uint16_t end_pos = 4 + little_endian_read_16(command, L2CAP_SIGNALING_COMMAND_LENGTH_OFFSET);
uint16_t pos = 8;
uint16_t pos = 10;
while (pos < end_pos){
uint8_t option_hint = command[pos] >> 7;
uint8_t option_type = command[pos] & 0x7f;
@ -1545,18 +1547,19 @@ static void l2cap_signaling_handle_configure_response(l2cap_channel_t *channel,
pos++;
uint8_t length = command[pos++];
#if 0
// Retransmission and Flow Control Option
if (option_type == 4 && length == 9){
if (channel->mode == L2CAP_CHANNEL_MODE_ENHANCED_RETRANSMISSION && channel->ertm_mandatory){
// ertm mandatory, but remote doens't offer ERTM -> disconnect
l2cap_channel_mode_t mode = (l2cap_channel_mode_t) command[pos];
if (mode != L2CAP_CHANNEL_MODE_ENHANCED_RETRANSMISSION){
channel->state = L2CAP_STATE_WILL_SEND_DISCONNECT_REQUEST;
if (channel->mode == L2CAP_CHANNEL_MODE_ENHANCED_RETRANSMISSION){
if (channel->ertm_mandatory){
//
} else {
// On 'Reject - Unacceptable Parameters', fall back to BASIC mode
if (result == 1){
channel->mode = L2CAP_CHANNEL_MODE_BASIC;
}
}
}
}
#endif
// check for unknown options
if (option_hint == 0 && (option_type == 0 || option_type >= 0x07)){
@ -1660,9 +1663,9 @@ static void l2cap_signaling_handler_channel(l2cap_channel_t *channel, uint8_t *c
break;
case CONFIGURE_RESPONSE:
l2cap_stop_rtx(channel);
l2cap_signaling_handle_configure_response(channel, result, command);
switch (result){
case 0: // success
l2cap_signaling_handle_configure_response(channel, command);
channelStateVarSetFlag(channel, L2CAP_CHANNEL_STATE_VAR_RCVD_CONF_RSP);
break;
case 4: // pending