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l2cap: disonnect cbm/ecbm if packet with sdu larger than mtu is received

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This commit is contained in:
Matthias Ringwald 2023-06-21 14:58:20 +02:00
parent 7dd21e2481
commit 9dd5391ffe
1 changed files with 5 additions and 1 deletions
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6
src/l2cap.c
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@ -5031,7 +5031,11 @@ static void l2cap_credit_based_handle_pdu(l2cap_channel_t * l2cap_channel, const
if (!l2cap_channel->receive_sdu_len){
if (size < (COMPLETE_L2CAP_HEADER + 2)) return;
uint16_t sdu_len = little_endian_read_16(packet, COMPLETE_L2CAP_HEADER);
if(sdu_len > l2cap_channel->local_mtu) return; // SDU would be larger than our buffer
if (sdu_len > l2cap_channel->local_mtu) {
log_info("(e)CBM: packet received larger than MTU");
l2cap_channel->state = L2CAP_STATE_WILL_SEND_DISCONNECT_REQUEST;
return;
}
l2cap_channel->receive_sdu_len = sdu_len;
l2cap_channel->receive_sdu_pos = 0;
pos += 2u;