1363 lines
43 KiB
C
1363 lines
43 KiB
C
/*
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* QEMU Bluetooth L2CAP logic.
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*
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* Copyright (C) 2008 Andrzej Zaborowski <balrog@zabor.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu-common.h"
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#include "qemu-timer.h"
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#include "bt.h"
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#define L2CAP_CID_MAX 0x100 /* Between 0x40 and 0x10000 */
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struct l2cap_instance_s {
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struct bt_link_s *link;
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struct bt_l2cap_device_s *dev;
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int role;
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uint8_t frame_in[65535 + L2CAP_HDR_SIZE] __attribute__ ((aligned (4)));
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int frame_in_len;
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uint8_t frame_out[65535 + L2CAP_HDR_SIZE] __attribute__ ((aligned (4)));
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int frame_out_len;
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/* Signalling channel timers. They exist per-request but we can make
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* sure we have no more than one outstanding request at any time. */
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QEMUTimer *rtx;
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QEMUTimer *ertx;
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int last_id;
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int next_id;
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struct l2cap_chan_s {
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struct bt_l2cap_conn_params_s params;
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void (*frame_in)(struct l2cap_chan_s *chan, uint16_t cid,
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const l2cap_hdr *hdr, int len);
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int mps;
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int min_mtu;
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struct l2cap_instance_s *l2cap;
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/* Only allocated channels */
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uint16_t remote_cid;
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#define L2CAP_CFG_INIT 2
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#define L2CAP_CFG_ACC 1
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int config_req_id; /* TODO: handle outgoing requests generically */
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int config;
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/* Only connection-oriented channels. Note: if we allow the tx and
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* rx traffic to be in different modes at any time, we need two. */
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int mode;
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/* Only flow-controlled, connection-oriented channels */
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uint8_t sdu[65536]; /* TODO: dynamically allocate */
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int len_cur, len_total;
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int rexmit;
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int monitor_timeout;
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QEMUTimer *monitor_timer;
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QEMUTimer *retransmission_timer;
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} *cid[L2CAP_CID_MAX];
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/* The channel state machine states map as following:
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* CLOSED -> !cid[N]
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* WAIT_CONNECT -> never occurs
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* WAIT_CONNECT_RSP -> never occurs
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* CONFIG -> cid[N] && config < 3
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* WAIT_CONFIG -> never occurs, cid[N] && config == 0 && !config_r
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* WAIT_SEND_CONFIG -> never occurs, cid[N] && config == 1 && !config_r
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* WAIT_CONFIG_REQ_RSP -> cid[N] && config == 0 && config_req_id
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* WAIT_CONFIG_RSP -> cid[N] && config == 1 && config_req_id
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* WAIT_CONFIG_REQ -> cid[N] && config == 2
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* OPEN -> cid[N] && config == 3
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* WAIT_DISCONNECT -> never occurs
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*/
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struct l2cap_chan_s signalling_ch;
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struct l2cap_chan_s group_ch;
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};
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struct slave_l2cap_instance_s {
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struct bt_link_s link; /* Underlying logical link (ACL) */
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struct l2cap_instance_s l2cap;
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};
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struct bt_l2cap_psm_s {
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int psm;
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int min_mtu;
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int (*new_channel)(struct bt_l2cap_device_s *device,
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struct bt_l2cap_conn_params_s *params);
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struct bt_l2cap_psm_s *next;
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};
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static const uint16_t l2cap_fcs16_table[256] = {
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0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241,
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0xc601, 0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440,
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0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40,
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0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841,
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0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40,
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0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41,
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0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641,
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0xd201, 0x12c0, 0x1380, 0xd341, 0x1100, 0xd1c1, 0xd081, 0x1040,
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0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240,
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0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441,
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0x3c00, 0xfcc1, 0xfd81, 0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41,
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0xfa01, 0x3ac0, 0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840,
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0x2800, 0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41,
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0xee01, 0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40,
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0xe401, 0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640,
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0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041,
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0xa001, 0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240,
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0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441,
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0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41,
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0xaa01, 0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840,
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0x7800, 0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41,
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0xbe01, 0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40,
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0xb401, 0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640,
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0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041,
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0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241,
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0x9601, 0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440,
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0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40,
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0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841,
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0x8801, 0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40,
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0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41,
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0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641,
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0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040,
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};
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static uint16_t l2cap_fcs16(const uint8_t *message, int len)
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{
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uint16_t fcs = 0x0000;
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while (len --)
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#if 0
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{
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int i;
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fcs ^= *message ++;
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for (i = 8; i; -- i)
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if (fcs & 1)
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fcs = (fcs >> 1) ^ 0xa001;
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else
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fcs = (fcs >> 1);
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}
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#else
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fcs = (fcs >> 8) ^ l2cap_fcs16_table[(fcs ^ *message ++) & 0xff];
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#endif
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return fcs;
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}
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/* L2CAP layer logic (protocol) */
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static void l2cap_retransmission_timer_update(struct l2cap_chan_s *ch)
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{
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#if 0
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if (ch->mode != L2CAP_MODE_BASIC && ch->rexmit)
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qemu_mod_timer(ch->retransmission_timer);
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else
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qemu_del_timer(ch->retransmission_timer);
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#endif
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}
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static void l2cap_monitor_timer_update(struct l2cap_chan_s *ch)
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{
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#if 0
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if (ch->mode != L2CAP_MODE_BASIC && !ch->rexmit)
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qemu_mod_timer(ch->monitor_timer);
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else
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qemu_del_timer(ch->monitor_timer);
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#endif
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}
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static void l2cap_command_reject(struct l2cap_instance_s *l2cap, int id,
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uint16_t reason, const void *data, int plen)
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{
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uint8_t *pkt;
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l2cap_cmd_hdr *hdr;
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l2cap_cmd_rej *params;
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uint16_t len;
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reason = cpu_to_le16(reason);
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len = cpu_to_le16(L2CAP_CMD_REJ_SIZE + plen);
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pkt = l2cap->signalling_ch.params.sdu_out(&l2cap->signalling_ch.params,
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L2CAP_CMD_HDR_SIZE + L2CAP_CMD_REJ_SIZE + plen);
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hdr = (void *) (pkt + 0);
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params = (void *) (pkt + L2CAP_CMD_HDR_SIZE);
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hdr->code = L2CAP_COMMAND_REJ;
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hdr->ident = id;
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memcpy(&hdr->len, &len, sizeof(hdr->len));
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memcpy(¶ms->reason, &reason, sizeof(reason));
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if (plen)
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memcpy(pkt + L2CAP_CMD_HDR_SIZE + L2CAP_CMD_REJ_SIZE, data, plen);
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l2cap->signalling_ch.params.sdu_submit(&l2cap->signalling_ch.params);
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}
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static void l2cap_command_reject_cid(struct l2cap_instance_s *l2cap, int id,
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uint16_t reason, uint16_t dcid, uint16_t scid)
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{
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l2cap_cmd_rej_cid params = {
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.dcid = dcid,
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.scid = scid,
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};
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l2cap_command_reject(l2cap, id, reason, ¶ms, L2CAP_CMD_REJ_CID_SIZE);
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}
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static void l2cap_connection_response(struct l2cap_instance_s *l2cap,
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int dcid, int scid, int result, int status)
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{
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uint8_t *pkt;
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l2cap_cmd_hdr *hdr;
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l2cap_conn_rsp *params;
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pkt = l2cap->signalling_ch.params.sdu_out(&l2cap->signalling_ch.params,
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L2CAP_CMD_HDR_SIZE + L2CAP_CONN_RSP_SIZE);
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hdr = (void *) (pkt + 0);
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params = (void *) (pkt + L2CAP_CMD_HDR_SIZE);
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hdr->code = L2CAP_CONN_RSP;
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hdr->ident = l2cap->last_id;
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hdr->len = cpu_to_le16(L2CAP_CONN_RSP_SIZE);
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params->dcid = cpu_to_le16(dcid);
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params->scid = cpu_to_le16(scid);
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params->result = cpu_to_le16(result);
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params->status = cpu_to_le16(status);
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l2cap->signalling_ch.params.sdu_submit(&l2cap->signalling_ch.params);
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}
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static void l2cap_configuration_request(struct l2cap_instance_s *l2cap,
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int dcid, int flag, const uint8_t *data, int len)
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{
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uint8_t *pkt;
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l2cap_cmd_hdr *hdr;
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l2cap_conf_req *params;
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pkt = l2cap->signalling_ch.params.sdu_out(&l2cap->signalling_ch.params,
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L2CAP_CMD_HDR_SIZE + L2CAP_CONF_REQ_SIZE(len));
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hdr = (void *) (pkt + 0);
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params = (void *) (pkt + L2CAP_CMD_HDR_SIZE);
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/* TODO: unify the id sequencing */
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l2cap->last_id = l2cap->next_id;
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l2cap->next_id = l2cap->next_id == 255 ? 1 : l2cap->next_id + 1;
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hdr->code = L2CAP_CONF_REQ;
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hdr->ident = l2cap->last_id;
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hdr->len = cpu_to_le16(L2CAP_CONF_REQ_SIZE(len));
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params->dcid = cpu_to_le16(dcid);
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params->flags = cpu_to_le16(flag);
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if (len)
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memcpy(params->data, data, len);
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l2cap->signalling_ch.params.sdu_submit(&l2cap->signalling_ch.params);
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}
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static void l2cap_configuration_response(struct l2cap_instance_s *l2cap,
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int scid, int flag, int result, const uint8_t *data, int len)
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{
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uint8_t *pkt;
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l2cap_cmd_hdr *hdr;
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l2cap_conf_rsp *params;
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pkt = l2cap->signalling_ch.params.sdu_out(&l2cap->signalling_ch.params,
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L2CAP_CMD_HDR_SIZE + L2CAP_CONF_RSP_SIZE(len));
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hdr = (void *) (pkt + 0);
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params = (void *) (pkt + L2CAP_CMD_HDR_SIZE);
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hdr->code = L2CAP_CONF_RSP;
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hdr->ident = l2cap->last_id;
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hdr->len = cpu_to_le16(L2CAP_CONF_RSP_SIZE(len));
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params->scid = cpu_to_le16(scid);
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params->flags = cpu_to_le16(flag);
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params->result = cpu_to_le16(result);
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if (len)
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memcpy(params->data, data, len);
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l2cap->signalling_ch.params.sdu_submit(&l2cap->signalling_ch.params);
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}
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static void l2cap_disconnection_response(struct l2cap_instance_s *l2cap,
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int dcid, int scid)
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{
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uint8_t *pkt;
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l2cap_cmd_hdr *hdr;
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l2cap_disconn_rsp *params;
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pkt = l2cap->signalling_ch.params.sdu_out(&l2cap->signalling_ch.params,
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L2CAP_CMD_HDR_SIZE + L2CAP_DISCONN_RSP_SIZE);
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hdr = (void *) (pkt + 0);
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params = (void *) (pkt + L2CAP_CMD_HDR_SIZE);
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hdr->code = L2CAP_DISCONN_RSP;
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hdr->ident = l2cap->last_id;
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hdr->len = cpu_to_le16(L2CAP_DISCONN_RSP_SIZE);
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params->dcid = cpu_to_le16(dcid);
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params->scid = cpu_to_le16(scid);
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l2cap->signalling_ch.params.sdu_submit(&l2cap->signalling_ch.params);
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}
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static void l2cap_echo_response(struct l2cap_instance_s *l2cap,
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const uint8_t *data, int len)
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{
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uint8_t *pkt;
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l2cap_cmd_hdr *hdr;
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uint8_t *params;
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pkt = l2cap->signalling_ch.params.sdu_out(&l2cap->signalling_ch.params,
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L2CAP_CMD_HDR_SIZE + len);
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hdr = (void *) (pkt + 0);
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params = (void *) (pkt + L2CAP_CMD_HDR_SIZE);
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hdr->code = L2CAP_ECHO_RSP;
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hdr->ident = l2cap->last_id;
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hdr->len = cpu_to_le16(len);
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memcpy(params, data, len);
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l2cap->signalling_ch.params.sdu_submit(&l2cap->signalling_ch.params);
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}
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static void l2cap_info_response(struct l2cap_instance_s *l2cap, int type,
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int result, const uint8_t *data, int len)
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{
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uint8_t *pkt;
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l2cap_cmd_hdr *hdr;
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l2cap_info_rsp *params;
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pkt = l2cap->signalling_ch.params.sdu_out(&l2cap->signalling_ch.params,
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L2CAP_CMD_HDR_SIZE + L2CAP_INFO_RSP_SIZE + len);
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hdr = (void *) (pkt + 0);
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params = (void *) (pkt + L2CAP_CMD_HDR_SIZE);
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hdr->code = L2CAP_INFO_RSP;
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hdr->ident = l2cap->last_id;
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hdr->len = cpu_to_le16(L2CAP_INFO_RSP_SIZE + len);
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params->type = cpu_to_le16(type);
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params->result = cpu_to_le16(result);
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if (len)
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memcpy(params->data, data, len);
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l2cap->signalling_ch.params.sdu_submit(&l2cap->signalling_ch.params);
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}
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static uint8_t *l2cap_bframe_out(struct bt_l2cap_conn_params_s *parm, int len);
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static void l2cap_bframe_submit(struct bt_l2cap_conn_params_s *parms);
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#if 0
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static uint8_t *l2cap_iframe_out(struct bt_l2cap_conn_params_s *parm, int len);
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static void l2cap_iframe_submit(struct bt_l2cap_conn_params_s *parm);
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#endif
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static void l2cap_bframe_in(struct l2cap_chan_s *ch, uint16_t cid,
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const l2cap_hdr *hdr, int len);
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static void l2cap_iframe_in(struct l2cap_chan_s *ch, uint16_t cid,
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const l2cap_hdr *hdr, int len);
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static int l2cap_cid_new(struct l2cap_instance_s *l2cap)
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{
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int i;
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for (i = L2CAP_CID_ALLOC; i < L2CAP_CID_MAX; i ++)
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if (!l2cap->cid[i])
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return i;
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return L2CAP_CID_INVALID;
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}
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static inline struct bt_l2cap_psm_s *l2cap_psm(
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struct bt_l2cap_device_s *device, int psm)
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{
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struct bt_l2cap_psm_s *ret = device->first_psm;
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while (ret && ret->psm != psm)
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ret = ret->next;
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return ret;
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}
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static struct l2cap_chan_s *l2cap_channel_open(struct l2cap_instance_s *l2cap,
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int psm, int source_cid)
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{
|
|
struct l2cap_chan_s *ch = NULL;
|
|
struct bt_l2cap_psm_s *psm_info;
|
|
int result, status;
|
|
int cid = l2cap_cid_new(l2cap);
|
|
|
|
if (cid) {
|
|
/* See what the channel is to be used for.. */
|
|
psm_info = l2cap_psm(l2cap->dev, psm);
|
|
|
|
if (psm_info) {
|
|
/* Device supports this use-case. */
|
|
ch = qemu_mallocz(sizeof(*ch));
|
|
ch->params.sdu_out = l2cap_bframe_out;
|
|
ch->params.sdu_submit = l2cap_bframe_submit;
|
|
ch->frame_in = l2cap_bframe_in;
|
|
ch->mps = 65536;
|
|
ch->min_mtu = MAX(48, psm_info->min_mtu);
|
|
ch->params.remote_mtu = MAX(672, ch->min_mtu);
|
|
ch->remote_cid = source_cid;
|
|
ch->mode = L2CAP_MODE_BASIC;
|
|
ch->l2cap = l2cap;
|
|
|
|
/* Does it feel like opening yet another channel though? */
|
|
if (!psm_info->new_channel(l2cap->dev, &ch->params)) {
|
|
l2cap->cid[cid] = ch;
|
|
|
|
result = L2CAP_CR_SUCCESS;
|
|
status = L2CAP_CS_NO_INFO;
|
|
} else {
|
|
qemu_free(ch);
|
|
|
|
result = L2CAP_CR_NO_MEM;
|
|
status = L2CAP_CS_NO_INFO;
|
|
}
|
|
} else {
|
|
result = L2CAP_CR_BAD_PSM;
|
|
status = L2CAP_CS_NO_INFO;
|
|
}
|
|
} else {
|
|
result = L2CAP_CR_NO_MEM;
|
|
status = L2CAP_CS_NO_INFO;
|
|
}
|
|
|
|
l2cap_connection_response(l2cap, cid, source_cid, result, status);
|
|
|
|
return ch;
|
|
}
|
|
|
|
static void l2cap_channel_close(struct l2cap_instance_s *l2cap,
|
|
int cid, int source_cid)
|
|
{
|
|
struct l2cap_chan_s *ch = NULL;
|
|
|
|
/* According to Volume 3, section 6.1.1, pg 1048 of BT Core V2.0, a
|
|
* connection in CLOSED state still responds with a L2CAP_DisconnectRsp
|
|
* message on an L2CAP_DisconnectReq event. */
|
|
if (unlikely(cid < L2CAP_CID_ALLOC)) {
|
|
l2cap_command_reject_cid(l2cap, l2cap->last_id, L2CAP_REJ_CID_INVAL,
|
|
cid, source_cid);
|
|
return;
|
|
}
|
|
if (likely(cid >= L2CAP_CID_ALLOC && cid < L2CAP_CID_MAX))
|
|
ch = l2cap->cid[cid];
|
|
|
|
if (likely(ch)) {
|
|
if (ch->remote_cid != source_cid) {
|
|
fprintf(stderr, "%s: Ignoring a Disconnection Request with the "
|
|
"invalid SCID %04x.\n", __FUNCTION__, source_cid);
|
|
return;
|
|
}
|
|
|
|
l2cap->cid[cid] = NULL;
|
|
|
|
ch->params.close(ch->params.opaque);
|
|
qemu_free(ch);
|
|
}
|
|
|
|
l2cap_disconnection_response(l2cap, cid, source_cid);
|
|
}
|
|
|
|
static void l2cap_channel_config_null(struct l2cap_instance_s *l2cap,
|
|
struct l2cap_chan_s *ch)
|
|
{
|
|
l2cap_configuration_request(l2cap, ch->remote_cid, 0, NULL, 0);
|
|
ch->config_req_id = l2cap->last_id;
|
|
ch->config &= ~L2CAP_CFG_INIT;
|
|
}
|
|
|
|
static void l2cap_channel_config_req_event(struct l2cap_instance_s *l2cap,
|
|
struct l2cap_chan_s *ch)
|
|
{
|
|
/* Use all default channel options and terminate negotiation. */
|
|
l2cap_channel_config_null(l2cap, ch);
|
|
}
|
|
|
|
static int l2cap_channel_config(struct l2cap_instance_s *l2cap,
|
|
struct l2cap_chan_s *ch, int flag,
|
|
const uint8_t *data, int len)
|
|
{
|
|
l2cap_conf_opt *opt;
|
|
l2cap_conf_opt_qos *qos;
|
|
uint32_t val;
|
|
uint8_t rsp[len];
|
|
int result = L2CAP_CONF_SUCCESS;
|
|
|
|
data = memcpy(rsp, data, len);
|
|
while (len) {
|
|
opt = (void *) data;
|
|
|
|
if (len < L2CAP_CONF_OPT_SIZE ||
|
|
len < L2CAP_CONF_OPT_SIZE + opt->len) {
|
|
result = L2CAP_CONF_REJECT;
|
|
break;
|
|
}
|
|
data += L2CAP_CONF_OPT_SIZE + opt->len;
|
|
len -= L2CAP_CONF_OPT_SIZE + opt->len;
|
|
|
|
switch (opt->type & 0x7f) {
|
|
case L2CAP_CONF_MTU:
|
|
if (opt->len != 2) {
|
|
result = L2CAP_CONF_REJECT;
|
|
break;
|
|
}
|
|
|
|
/* MTU */
|
|
val = le16_to_cpup((void *) opt->val);
|
|
if (val < ch->min_mtu) {
|
|
cpu_to_le16w((void *) opt->val, ch->min_mtu);
|
|
result = L2CAP_CONF_UNACCEPT;
|
|
break;
|
|
}
|
|
|
|
ch->params.remote_mtu = val;
|
|
break;
|
|
|
|
case L2CAP_CONF_FLUSH_TO:
|
|
if (opt->len != 2) {
|
|
result = L2CAP_CONF_REJECT;
|
|
break;
|
|
}
|
|
|
|
/* Flush Timeout */
|
|
val = le16_to_cpup((void *) opt->val);
|
|
if (val < 0x0001) {
|
|
opt->val[0] = 0xff;
|
|
opt->val[1] = 0xff;
|
|
result = L2CAP_CONF_UNACCEPT;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case L2CAP_CONF_QOS:
|
|
if (opt->len != L2CAP_CONF_OPT_QOS_SIZE) {
|
|
result = L2CAP_CONF_REJECT;
|
|
break;
|
|
}
|
|
qos = (void *) opt->val;
|
|
|
|
/* Flags */
|
|
val = qos->flags;
|
|
if (val) {
|
|
qos->flags = 0;
|
|
result = L2CAP_CONF_UNACCEPT;
|
|
}
|
|
|
|
/* Service type */
|
|
val = qos->service_type;
|
|
if (val != L2CAP_CONF_QOS_BEST_EFFORT &&
|
|
val != L2CAP_CONF_QOS_NO_TRAFFIC) {
|
|
qos->service_type = L2CAP_CONF_QOS_BEST_EFFORT;
|
|
result = L2CAP_CONF_UNACCEPT;
|
|
}
|
|
|
|
if (val != L2CAP_CONF_QOS_NO_TRAFFIC) {
|
|
/* XXX: These values should possibly be calculated
|
|
* based on LM / baseband properties also. */
|
|
|
|
/* Token rate */
|
|
val = le32_to_cpu(qos->token_rate);
|
|
if (val == L2CAP_CONF_QOS_WILDCARD)
|
|
qos->token_rate = cpu_to_le32(0x100000);
|
|
|
|
/* Token bucket size */
|
|
val = le32_to_cpu(qos->token_bucket_size);
|
|
if (val == L2CAP_CONF_QOS_WILDCARD)
|
|
qos->token_bucket_size = cpu_to_le32(65500);
|
|
|
|
/* Any Peak bandwidth value is correct to return as-is */
|
|
/* Any Access latency value is correct to return as-is */
|
|
/* Any Delay variation value is correct to return as-is */
|
|
}
|
|
break;
|
|
|
|
case L2CAP_CONF_RFC:
|
|
if (opt->len != 9) {
|
|
result = L2CAP_CONF_REJECT;
|
|
break;
|
|
}
|
|
|
|
/* Mode */
|
|
val = opt->val[0];
|
|
switch (val) {
|
|
case L2CAP_MODE_BASIC:
|
|
ch->mode = val;
|
|
ch->frame_in = l2cap_bframe_in;
|
|
|
|
/* All other parameters shall be ignored */
|
|
break;
|
|
|
|
case L2CAP_MODE_RETRANS:
|
|
case L2CAP_MODE_FLOWCTL:
|
|
ch->mode = val;
|
|
ch->frame_in = l2cap_iframe_in;
|
|
/* Note: most of these parameters refer to incoming traffic
|
|
* so we don't need to save them as long as we can accept
|
|
* incoming PDUs at any values of the parameters. */
|
|
|
|
/* TxWindow size */
|
|
val = opt->val[1];
|
|
if (val < 1 || val > 32) {
|
|
opt->val[1] = 32;
|
|
result = L2CAP_CONF_UNACCEPT;
|
|
break;
|
|
}
|
|
|
|
/* MaxTransmit */
|
|
val = opt->val[2];
|
|
if (val < 1) {
|
|
opt->val[2] = 1;
|
|
result = L2CAP_CONF_UNACCEPT;
|
|
break;
|
|
}
|
|
|
|
/* Remote Retransmission time-out shouldn't affect local
|
|
* operation (?) */
|
|
|
|
/* The Monitor time-out drives the local Monitor timer (?),
|
|
* so save the value. */
|
|
val = (opt->val[6] << 8) | opt->val[5];
|
|
if (val < 30) {
|
|
opt->val[5] = 100 & 0xff;
|
|
opt->val[6] = 100 >> 8;
|
|
result = L2CAP_CONF_UNACCEPT;
|
|
break;
|
|
}
|
|
ch->monitor_timeout = val;
|
|
l2cap_monitor_timer_update(ch);
|
|
|
|
/* MPS */
|
|
val = (opt->val[8] << 8) | opt->val[7];
|
|
if (val < ch->min_mtu) {
|
|
opt->val[7] = ch->min_mtu & 0xff;
|
|
opt->val[8] = ch->min_mtu >> 8;
|
|
result = L2CAP_CONF_UNACCEPT;
|
|
break;
|
|
}
|
|
ch->mps = val;
|
|
break;
|
|
|
|
default:
|
|
result = L2CAP_CONF_UNACCEPT;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (!(opt->type >> 7))
|
|
result = L2CAP_CONF_UNKNOWN;
|
|
break;
|
|
}
|
|
|
|
if (result != L2CAP_CONF_SUCCESS)
|
|
break; /* XXX: should continue? */
|
|
}
|
|
|
|
l2cap_configuration_response(l2cap, ch->remote_cid,
|
|
flag, result, rsp, len);
|
|
|
|
return result == L2CAP_CONF_SUCCESS && !flag;
|
|
}
|
|
|
|
static void l2cap_channel_config_req_msg(struct l2cap_instance_s *l2cap,
|
|
int flag, int cid, const uint8_t *data, int len)
|
|
{
|
|
struct l2cap_chan_s *ch;
|
|
|
|
if (unlikely(cid >= L2CAP_CID_MAX || !l2cap->cid[cid])) {
|
|
l2cap_command_reject_cid(l2cap, l2cap->last_id, L2CAP_REJ_CID_INVAL,
|
|
cid, 0x0000);
|
|
return;
|
|
}
|
|
ch = l2cap->cid[cid];
|
|
|
|
/* From OPEN go to WAIT_CONFIG_REQ and from WAIT_CONFIG_REQ_RSP to
|
|
* WAIT_CONFIG_REQ_RSP. This is assuming the transition chart for OPEN
|
|
* on pg 1053, section 6.1.5, volume 3 of BT Core V2.0 has a mistake
|
|
* and on options-acceptable we go back to OPEN and otherwise to
|
|
* WAIT_CONFIG_REQ and not the other way. */
|
|
ch->config &= ~L2CAP_CFG_ACC;
|
|
|
|
if (l2cap_channel_config(l2cap, ch, flag, data, len))
|
|
/* Go to OPEN or WAIT_CONFIG_RSP */
|
|
ch->config |= L2CAP_CFG_ACC;
|
|
|
|
/* TODO: if the incoming traffic flow control or retransmission mode
|
|
* changed then we probably need to also generate the
|
|
* ConfigureChannel_Req event and set the outgoing traffic to the same
|
|
* mode. */
|
|
if (!(ch->config & L2CAP_CFG_INIT) && (ch->config & L2CAP_CFG_ACC) &&
|
|
!ch->config_req_id)
|
|
l2cap_channel_config_req_event(l2cap, ch);
|
|
}
|
|
|
|
static int l2cap_channel_config_rsp_msg(struct l2cap_instance_s *l2cap,
|
|
int result, int flag, int cid, const uint8_t *data, int len)
|
|
{
|
|
struct l2cap_chan_s *ch;
|
|
|
|
if (unlikely(cid >= L2CAP_CID_MAX || !l2cap->cid[cid])) {
|
|
l2cap_command_reject_cid(l2cap, l2cap->last_id, L2CAP_REJ_CID_INVAL,
|
|
cid, 0x0000);
|
|
return 0;
|
|
}
|
|
ch = l2cap->cid[cid];
|
|
|
|
if (ch->config_req_id != l2cap->last_id)
|
|
return 1;
|
|
ch->config_req_id = 0;
|
|
|
|
if (result == L2CAP_CONF_SUCCESS) {
|
|
if (!flag)
|
|
ch->config |= L2CAP_CFG_INIT;
|
|
else
|
|
l2cap_channel_config_null(l2cap, ch);
|
|
} else
|
|
/* Retry until we succeed */
|
|
l2cap_channel_config_req_event(l2cap, ch);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void l2cap_channel_open_req_msg(struct l2cap_instance_s *l2cap,
|
|
int psm, int source_cid)
|
|
{
|
|
struct l2cap_chan_s *ch = l2cap_channel_open(l2cap, psm, source_cid);
|
|
|
|
if (!ch)
|
|
return;
|
|
|
|
/* Optional */
|
|
if (!(ch->config & L2CAP_CFG_INIT) && !ch->config_req_id)
|
|
l2cap_channel_config_req_event(l2cap, ch);
|
|
}
|
|
|
|
static void l2cap_info(struct l2cap_instance_s *l2cap, int type)
|
|
{
|
|
uint8_t data[4];
|
|
int len = 0;
|
|
int result = L2CAP_IR_SUCCESS;
|
|
|
|
switch (type) {
|
|
case L2CAP_IT_CL_MTU:
|
|
data[len ++] = l2cap->group_ch.mps & 0xff;
|
|
data[len ++] = l2cap->group_ch.mps >> 8;
|
|
break;
|
|
|
|
case L2CAP_IT_FEAT_MASK:
|
|
/* (Prematurely) report Flow control and Retransmission modes. */
|
|
data[len ++] = 0x03;
|
|
data[len ++] = 0x00;
|
|
data[len ++] = 0x00;
|
|
data[len ++] = 0x00;
|
|
break;
|
|
|
|
default:
|
|
result = L2CAP_IR_NOTSUPP;
|
|
}
|
|
|
|
l2cap_info_response(l2cap, type, result, data, len);
|
|
}
|
|
|
|
static void l2cap_command(struct l2cap_instance_s *l2cap, int code, int id,
|
|
const uint8_t *params, int len)
|
|
{
|
|
int err;
|
|
|
|
#if 0
|
|
/* TODO: do the IDs really have to be in sequence? */
|
|
if (!id || (id != l2cap->last_id && id != l2cap->next_id)) {
|
|
fprintf(stderr, "%s: out of sequence command packet ignored.\n",
|
|
__FUNCTION__);
|
|
return;
|
|
}
|
|
#else
|
|
l2cap->next_id = id;
|
|
#endif
|
|
if (id == l2cap->next_id) {
|
|
l2cap->last_id = l2cap->next_id;
|
|
l2cap->next_id = l2cap->next_id == 255 ? 1 : l2cap->next_id + 1;
|
|
} else {
|
|
/* TODO: Need to re-send the same response, without re-executing
|
|
* the corresponding command! */
|
|
}
|
|
|
|
switch (code) {
|
|
case L2CAP_COMMAND_REJ:
|
|
if (unlikely(len != 2 && len != 4 && len != 6)) {
|
|
err = L2CAP_REJ_CMD_NOT_UNDERSTOOD;
|
|
goto reject;
|
|
}
|
|
|
|
/* We never issue commands other than Command Reject currently. */
|
|
fprintf(stderr, "%s: stray Command Reject (%02x, %04x) "
|
|
"packet, ignoring.\n", __FUNCTION__, id,
|
|
le16_to_cpu(((l2cap_cmd_rej *) params)->reason));
|
|
break;
|
|
|
|
case L2CAP_CONN_REQ:
|
|
if (unlikely(len != L2CAP_CONN_REQ_SIZE)) {
|
|
err = L2CAP_REJ_CMD_NOT_UNDERSTOOD;
|
|
goto reject;
|
|
}
|
|
|
|
l2cap_channel_open_req_msg(l2cap,
|
|
le16_to_cpu(((l2cap_conn_req *) params)->psm),
|
|
le16_to_cpu(((l2cap_conn_req *) params)->scid));
|
|
break;
|
|
|
|
case L2CAP_CONN_RSP:
|
|
if (unlikely(len != L2CAP_CONN_RSP_SIZE)) {
|
|
err = L2CAP_REJ_CMD_NOT_UNDERSTOOD;
|
|
goto reject;
|
|
}
|
|
|
|
/* We never issue Connection Requests currently. TODO */
|
|
fprintf(stderr, "%s: unexpected Connection Response (%02x) "
|
|
"packet, ignoring.\n", __FUNCTION__, id);
|
|
break;
|
|
|
|
case L2CAP_CONF_REQ:
|
|
if (unlikely(len < L2CAP_CONF_REQ_SIZE(0))) {
|
|
err = L2CAP_REJ_CMD_NOT_UNDERSTOOD;
|
|
goto reject;
|
|
}
|
|
|
|
l2cap_channel_config_req_msg(l2cap,
|
|
le16_to_cpu(((l2cap_conf_req *) params)->flags) & 1,
|
|
le16_to_cpu(((l2cap_conf_req *) params)->dcid),
|
|
((l2cap_conf_req *) params)->data,
|
|
len - L2CAP_CONF_REQ_SIZE(0));
|
|
break;
|
|
|
|
case L2CAP_CONF_RSP:
|
|
if (unlikely(len < L2CAP_CONF_RSP_SIZE(0))) {
|
|
err = L2CAP_REJ_CMD_NOT_UNDERSTOOD;
|
|
goto reject;
|
|
}
|
|
|
|
if (l2cap_channel_config_rsp_msg(l2cap,
|
|
le16_to_cpu(((l2cap_conf_rsp *) params)->result),
|
|
le16_to_cpu(((l2cap_conf_rsp *) params)->flags) & 1,
|
|
le16_to_cpu(((l2cap_conf_rsp *) params)->scid),
|
|
((l2cap_conf_rsp *) params)->data,
|
|
len - L2CAP_CONF_RSP_SIZE(0)))
|
|
fprintf(stderr, "%s: unexpected Configure Response (%02x) "
|
|
"packet, ignoring.\n", __FUNCTION__, id);
|
|
break;
|
|
|
|
case L2CAP_DISCONN_REQ:
|
|
if (unlikely(len != L2CAP_DISCONN_REQ_SIZE)) {
|
|
err = L2CAP_REJ_CMD_NOT_UNDERSTOOD;
|
|
goto reject;
|
|
}
|
|
|
|
l2cap_channel_close(l2cap,
|
|
le16_to_cpu(((l2cap_disconn_req *) params)->dcid),
|
|
le16_to_cpu(((l2cap_disconn_req *) params)->scid));
|
|
break;
|
|
|
|
case L2CAP_DISCONN_RSP:
|
|
if (unlikely(len != L2CAP_DISCONN_RSP_SIZE)) {
|
|
err = L2CAP_REJ_CMD_NOT_UNDERSTOOD;
|
|
goto reject;
|
|
}
|
|
|
|
/* We never issue Disconnection Requests currently. TODO */
|
|
fprintf(stderr, "%s: unexpected Disconnection Response (%02x) "
|
|
"packet, ignoring.\n", __FUNCTION__, id);
|
|
break;
|
|
|
|
case L2CAP_ECHO_REQ:
|
|
l2cap_echo_response(l2cap, params, len);
|
|
break;
|
|
|
|
case L2CAP_ECHO_RSP:
|
|
/* We never issue Echo Requests currently. TODO */
|
|
fprintf(stderr, "%s: unexpected Echo Response (%02x) "
|
|
"packet, ignoring.\n", __FUNCTION__, id);
|
|
break;
|
|
|
|
case L2CAP_INFO_REQ:
|
|
if (unlikely(len != L2CAP_INFO_REQ_SIZE)) {
|
|
err = L2CAP_REJ_CMD_NOT_UNDERSTOOD;
|
|
goto reject;
|
|
}
|
|
|
|
l2cap_info(l2cap, le16_to_cpu(((l2cap_info_req *) params)->type));
|
|
break;
|
|
|
|
case L2CAP_INFO_RSP:
|
|
if (unlikely(len != L2CAP_INFO_RSP_SIZE)) {
|
|
err = L2CAP_REJ_CMD_NOT_UNDERSTOOD;
|
|
goto reject;
|
|
}
|
|
|
|
/* We never issue Information Requests currently. TODO */
|
|
fprintf(stderr, "%s: unexpected Information Response (%02x) "
|
|
"packet, ignoring.\n", __FUNCTION__, id);
|
|
break;
|
|
|
|
default:
|
|
err = L2CAP_REJ_CMD_NOT_UNDERSTOOD;
|
|
reject:
|
|
l2cap_command_reject(l2cap, id, err, 0, 0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void l2cap_rexmit_enable(struct l2cap_chan_s *ch, int enable)
|
|
{
|
|
ch->rexmit = enable;
|
|
|
|
l2cap_retransmission_timer_update(ch);
|
|
l2cap_monitor_timer_update(ch);
|
|
}
|
|
|
|
/* Command frame SDU */
|
|
static void l2cap_cframe_in(void *opaque, const uint8_t *data, int len)
|
|
{
|
|
struct l2cap_instance_s *l2cap = opaque;
|
|
const l2cap_cmd_hdr *hdr;
|
|
int clen;
|
|
|
|
while (len) {
|
|
hdr = (void *) data;
|
|
if (len < L2CAP_CMD_HDR_SIZE)
|
|
/* TODO: signal an error */
|
|
return;
|
|
len -= L2CAP_CMD_HDR_SIZE;
|
|
data += L2CAP_CMD_HDR_SIZE;
|
|
|
|
clen = le16_to_cpu(hdr->len);
|
|
if (len < clen) {
|
|
l2cap_command_reject(l2cap, hdr->ident,
|
|
L2CAP_REJ_CMD_NOT_UNDERSTOOD, 0, 0);
|
|
break;
|
|
}
|
|
|
|
l2cap_command(l2cap, hdr->code, hdr->ident, data, clen);
|
|
len -= clen;
|
|
data += clen;
|
|
}
|
|
}
|
|
|
|
/* Group frame SDU */
|
|
static void l2cap_gframe_in(void *opaque, const uint8_t *data, int len)
|
|
{
|
|
}
|
|
|
|
/* Supervisory frame */
|
|
static void l2cap_sframe_in(struct l2cap_chan_s *ch, uint16_t ctrl)
|
|
{
|
|
}
|
|
|
|
/* Basic L2CAP mode Information frame */
|
|
static void l2cap_bframe_in(struct l2cap_chan_s *ch, uint16_t cid,
|
|
const l2cap_hdr *hdr, int len)
|
|
{
|
|
/* We have a full SDU, no further processing */
|
|
ch->params.sdu_in(ch->params.opaque, hdr->data, len);
|
|
}
|
|
|
|
/* Flow Control and Retransmission mode frame */
|
|
static void l2cap_iframe_in(struct l2cap_chan_s *ch, uint16_t cid,
|
|
const l2cap_hdr *hdr, int len)
|
|
{
|
|
uint16_t fcs = le16_to_cpup((void *) (hdr->data + len - 2));
|
|
|
|
if (len < 4)
|
|
goto len_error;
|
|
if (l2cap_fcs16((const uint8_t *) hdr, L2CAP_HDR_SIZE + len - 2) != fcs)
|
|
goto fcs_error;
|
|
|
|
if ((hdr->data[0] >> 7) == ch->rexmit)
|
|
l2cap_rexmit_enable(ch, !(hdr->data[0] >> 7));
|
|
|
|
if (hdr->data[0] & 1) {
|
|
if (len != 4)
|
|
/* TODO: Signal an error? */;
|
|
return;
|
|
|
|
return l2cap_sframe_in(ch, le16_to_cpup((void *) hdr->data));
|
|
}
|
|
|
|
switch (hdr->data[1] >> 6) { /* SAR */
|
|
case L2CAP_SAR_NO_SEG:
|
|
if (ch->len_total)
|
|
goto seg_error;
|
|
if (len - 4 > ch->mps)
|
|
goto len_error;
|
|
|
|
return ch->params.sdu_in(ch->params.opaque, hdr->data + 2, len - 4);
|
|
|
|
case L2CAP_SAR_START:
|
|
if (ch->len_total || len < 6)
|
|
goto seg_error;
|
|
if (len - 6 > ch->mps)
|
|
goto len_error;
|
|
|
|
ch->len_total = le16_to_cpup((void *) (hdr->data + 2));
|
|
if (len >= 6 + ch->len_total)
|
|
goto seg_error;
|
|
|
|
ch->len_cur = len - 6;
|
|
memcpy(ch->sdu, hdr->data + 4, ch->len_cur);
|
|
break;
|
|
|
|
case L2CAP_SAR_END:
|
|
if (!ch->len_total || ch->len_cur + len - 4 < ch->len_total)
|
|
goto seg_error;
|
|
if (len - 4 > ch->mps)
|
|
goto len_error;
|
|
|
|
memcpy(ch->sdu + ch->len_cur, hdr->data + 2, len - 4);
|
|
return ch->params.sdu_in(ch->params.opaque, ch->sdu, ch->len_total);
|
|
|
|
case L2CAP_SAR_CONT:
|
|
if (!ch->len_total || ch->len_cur + len - 4 >= ch->len_total)
|
|
goto seg_error;
|
|
if (len - 4 > ch->mps)
|
|
goto len_error;
|
|
|
|
memcpy(ch->sdu + ch->len_cur, hdr->data + 2, len - 4);
|
|
ch->len_cur += len - 4;
|
|
break;
|
|
|
|
seg_error:
|
|
len_error: /* TODO */
|
|
fcs_error: /* TODO */
|
|
ch->len_cur = 0;
|
|
ch->len_total = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void l2cap_frame_in(struct l2cap_instance_s *l2cap,
|
|
const l2cap_hdr *frame)
|
|
{
|
|
uint16_t cid = le16_to_cpu(frame->cid);
|
|
uint16_t len = le16_to_cpu(frame->len);
|
|
|
|
if (unlikely(cid >= L2CAP_CID_MAX || !l2cap->cid[cid])) {
|
|
fprintf(stderr, "%s: frame addressed to a non-existent L2CAP "
|
|
"channel %04x received.\n", __FUNCTION__, cid);
|
|
return;
|
|
}
|
|
|
|
l2cap->cid[cid]->frame_in(l2cap->cid[cid], cid, frame, len);
|
|
}
|
|
|
|
/* "Recombination" */
|
|
static void l2cap_pdu_in(struct l2cap_instance_s *l2cap,
|
|
const uint8_t *data, int len)
|
|
{
|
|
const l2cap_hdr *hdr = (void *) l2cap->frame_in;
|
|
|
|
if (unlikely(len + l2cap->frame_in_len > sizeof(l2cap->frame_in))) {
|
|
if (l2cap->frame_in_len < sizeof(l2cap->frame_in)) {
|
|
memcpy(l2cap->frame_in + l2cap->frame_in_len, data,
|
|
sizeof(l2cap->frame_in) - l2cap->frame_in_len);
|
|
l2cap->frame_in_len = sizeof(l2cap->frame_in);
|
|
/* TODO: truncate */
|
|
l2cap_frame_in(l2cap, hdr);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
memcpy(l2cap->frame_in + l2cap->frame_in_len, data, len);
|
|
l2cap->frame_in_len += len;
|
|
|
|
if (len >= L2CAP_HDR_SIZE)
|
|
if (len >= L2CAP_HDR_SIZE + le16_to_cpu(hdr->len))
|
|
l2cap_frame_in(l2cap, hdr);
|
|
/* There is never a start of a new PDU in the same ACL packet, so
|
|
* no need to memmove the remaining payload and loop. */
|
|
}
|
|
|
|
static inline uint8_t *l2cap_pdu_out(struct l2cap_instance_s *l2cap,
|
|
uint16_t cid, uint16_t len)
|
|
{
|
|
l2cap_hdr *hdr = (void *) l2cap->frame_out;
|
|
|
|
l2cap->frame_out_len = len + L2CAP_HDR_SIZE;
|
|
|
|
hdr->cid = cpu_to_le16(cid);
|
|
hdr->len = cpu_to_le16(len);
|
|
|
|
return l2cap->frame_out + L2CAP_HDR_SIZE;
|
|
}
|
|
|
|
static inline void l2cap_pdu_submit(struct l2cap_instance_s *l2cap)
|
|
{
|
|
/* TODO: Fragmentation */
|
|
(l2cap->role ?
|
|
l2cap->link->slave->lmp_acl_data : l2cap->link->host->lmp_acl_resp)
|
|
(l2cap->link, l2cap->frame_out, 1, l2cap->frame_out_len);
|
|
}
|
|
|
|
static uint8_t *l2cap_bframe_out(struct bt_l2cap_conn_params_s *parm, int len)
|
|
{
|
|
struct l2cap_chan_s *chan = (struct l2cap_chan_s *) parm;
|
|
|
|
if (len > chan->params.remote_mtu) {
|
|
fprintf(stderr, "%s: B-Frame for CID %04x longer than %i octets.\n",
|
|
__FUNCTION__,
|
|
chan->remote_cid, chan->params.remote_mtu);
|
|
exit(-1);
|
|
}
|
|
|
|
return l2cap_pdu_out(chan->l2cap, chan->remote_cid, len);
|
|
}
|
|
|
|
static void l2cap_bframe_submit(struct bt_l2cap_conn_params_s *parms)
|
|
{
|
|
struct l2cap_chan_s *chan = (struct l2cap_chan_s *) parms;
|
|
|
|
return l2cap_pdu_submit(chan->l2cap);
|
|
}
|
|
|
|
#if 0
|
|
/* Stub: Only used if an emulated device requests outgoing flow control */
|
|
static uint8_t *l2cap_iframe_out(struct bt_l2cap_conn_params_s *parm, int len)
|
|
{
|
|
struct l2cap_chan_s *chan = (struct l2cap_chan_s *) parm;
|
|
|
|
if (len > chan->params.remote_mtu) {
|
|
/* TODO: slice into segments and queue each segment as a separate
|
|
* I-Frame in a FIFO of I-Frames, local to the CID. */
|
|
} else {
|
|
/* TODO: add to the FIFO of I-Frames, local to the CID. */
|
|
/* Possibly we need to return a pointer to a contiguous buffer
|
|
* for now and then memcpy from it into FIFOs in l2cap_iframe_submit
|
|
* while segmenting at the same time. */
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void l2cap_iframe_submit(struct bt_l2cap_conn_params_s *parm)
|
|
{
|
|
/* TODO: If flow control indicates clear to send, start submitting the
|
|
* invidual I-Frames from the FIFO, but don't remove them from there.
|
|
* Kick the appropriate timer until we get an S-Frame, and only then
|
|
* remove from FIFO or resubmit and re-kick the timer if the timer
|
|
* expired. */
|
|
}
|
|
#endif
|
|
|
|
static void l2cap_init(struct l2cap_instance_s *l2cap,
|
|
struct bt_link_s *link, int role)
|
|
{
|
|
l2cap->link = link;
|
|
l2cap->role = role;
|
|
l2cap->dev = (struct bt_l2cap_device_s *)
|
|
(role ? link->host : link->slave);
|
|
|
|
l2cap->next_id = 1;
|
|
|
|
/* Establish the signalling channel */
|
|
l2cap->signalling_ch.params.sdu_in = l2cap_cframe_in;
|
|
l2cap->signalling_ch.params.sdu_out = l2cap_bframe_out;
|
|
l2cap->signalling_ch.params.sdu_submit = l2cap_bframe_submit;
|
|
l2cap->signalling_ch.params.opaque = l2cap;
|
|
l2cap->signalling_ch.params.remote_mtu = 48;
|
|
l2cap->signalling_ch.remote_cid = L2CAP_CID_SIGNALLING;
|
|
l2cap->signalling_ch.frame_in = l2cap_bframe_in;
|
|
l2cap->signalling_ch.mps = 65536;
|
|
l2cap->signalling_ch.min_mtu = 48;
|
|
l2cap->signalling_ch.mode = L2CAP_MODE_BASIC;
|
|
l2cap->signalling_ch.l2cap = l2cap;
|
|
l2cap->cid[L2CAP_CID_SIGNALLING] = &l2cap->signalling_ch;
|
|
|
|
/* Establish the connection-less data channel */
|
|
l2cap->group_ch.params.sdu_in = l2cap_gframe_in;
|
|
l2cap->group_ch.params.opaque = l2cap;
|
|
l2cap->group_ch.frame_in = l2cap_bframe_in;
|
|
l2cap->group_ch.mps = 65533;
|
|
l2cap->group_ch.l2cap = l2cap;
|
|
l2cap->group_ch.remote_cid = L2CAP_CID_INVALID;
|
|
l2cap->cid[L2CAP_CID_GROUP] = &l2cap->group_ch;
|
|
}
|
|
|
|
static void l2cap_teardown(struct l2cap_instance_s *l2cap, int send_disconnect)
|
|
{
|
|
int cid;
|
|
|
|
/* Don't send DISCONNECT if we are currently handling a DISCONNECT
|
|
* sent from the other side. */
|
|
if (send_disconnect) {
|
|
if (l2cap->role)
|
|
l2cap->dev->device.lmp_disconnect_slave(l2cap->link);
|
|
/* l2cap->link is invalid from now on. */
|
|
else
|
|
l2cap->dev->device.lmp_disconnect_master(l2cap->link);
|
|
}
|
|
|
|
for (cid = L2CAP_CID_ALLOC; cid < L2CAP_CID_MAX; cid ++)
|
|
if (l2cap->cid[cid]) {
|
|
l2cap->cid[cid]->params.close(l2cap->cid[cid]->params.opaque);
|
|
free(l2cap->cid[cid]);
|
|
}
|
|
|
|
if (l2cap->role)
|
|
qemu_free(l2cap);
|
|
else
|
|
qemu_free(l2cap->link);
|
|
}
|
|
|
|
/* L2CAP glue to lower layers in bluetooth stack (LMP) */
|
|
|
|
static void l2cap_lmp_connection_request(struct bt_link_s *link)
|
|
{
|
|
struct bt_l2cap_device_s *dev = (struct bt_l2cap_device_s *) link->slave;
|
|
struct slave_l2cap_instance_s *l2cap;
|
|
|
|
/* Always accept - we only get called if (dev->device->page_scan). */
|
|
|
|
l2cap = qemu_mallocz(sizeof(struct slave_l2cap_instance_s));
|
|
l2cap->link.slave = &dev->device;
|
|
l2cap->link.host = link->host;
|
|
l2cap_init(&l2cap->l2cap, &l2cap->link, 0);
|
|
|
|
/* Always at the end */
|
|
link->host->reject_reason = 0;
|
|
link->host->lmp_connection_complete(&l2cap->link);
|
|
}
|
|
|
|
/* Stub */
|
|
static void l2cap_lmp_connection_complete(struct bt_link_s *link)
|
|
{
|
|
struct bt_l2cap_device_s *dev = (struct bt_l2cap_device_s *) link->host;
|
|
struct l2cap_instance_s *l2cap;
|
|
|
|
if (dev->device.reject_reason) {
|
|
/* Signal to upper layer */
|
|
return;
|
|
}
|
|
|
|
l2cap = qemu_mallocz(sizeof(struct l2cap_instance_s));
|
|
l2cap_init(l2cap, link, 1);
|
|
|
|
link->acl_mode = acl_active;
|
|
|
|
/* Signal to upper layer */
|
|
}
|
|
|
|
/* Stub */
|
|
static void l2cap_lmp_disconnect_host(struct bt_link_s *link)
|
|
{
|
|
struct bt_l2cap_device_s *dev = (struct bt_l2cap_device_s *) link->host;
|
|
struct l2cap_instance_s *l2cap =
|
|
/* TODO: Retrieve from upper layer */ (void *) dev;
|
|
|
|
/* Signal to upper layer */
|
|
|
|
l2cap_teardown(l2cap, 0);
|
|
}
|
|
|
|
static void l2cap_lmp_disconnect_slave(struct bt_link_s *link)
|
|
{
|
|
struct slave_l2cap_instance_s *l2cap =
|
|
(struct slave_l2cap_instance_s *) link;
|
|
|
|
l2cap_teardown(&l2cap->l2cap, 0);
|
|
}
|
|
|
|
static void l2cap_lmp_acl_data_slave(struct bt_link_s *link,
|
|
const uint8_t *data, int start, int len)
|
|
{
|
|
struct slave_l2cap_instance_s *l2cap =
|
|
(struct slave_l2cap_instance_s *) link;
|
|
|
|
if (start)
|
|
l2cap->l2cap.frame_in_len = 0;
|
|
|
|
l2cap_pdu_in(&l2cap->l2cap, data, len);
|
|
}
|
|
|
|
/* Stub */
|
|
static void l2cap_lmp_acl_data_host(struct bt_link_s *link,
|
|
const uint8_t *data, int start, int len)
|
|
{
|
|
struct bt_l2cap_device_s *dev = (struct bt_l2cap_device_s *) link->host;
|
|
struct l2cap_instance_s *l2cap =
|
|
/* TODO: Retrieve from upper layer */ (void *) dev;
|
|
|
|
if (start)
|
|
l2cap->frame_in_len = 0;
|
|
|
|
l2cap_pdu_in(l2cap, data, len);
|
|
}
|
|
|
|
static void l2cap_dummy_destroy(struct bt_device_s *dev)
|
|
{
|
|
struct bt_l2cap_device_s *l2cap_dev = (struct bt_l2cap_device_s *) dev;
|
|
|
|
bt_l2cap_device_done(l2cap_dev);
|
|
}
|
|
|
|
void bt_l2cap_device_init(struct bt_l2cap_device_s *dev,
|
|
struct bt_scatternet_s *net)
|
|
{
|
|
bt_device_init(&dev->device, net);
|
|
|
|
dev->device.lmp_connection_request = l2cap_lmp_connection_request;
|
|
dev->device.lmp_connection_complete = l2cap_lmp_connection_complete;
|
|
dev->device.lmp_disconnect_master = l2cap_lmp_disconnect_host;
|
|
dev->device.lmp_disconnect_slave = l2cap_lmp_disconnect_slave;
|
|
dev->device.lmp_acl_data = l2cap_lmp_acl_data_slave;
|
|
dev->device.lmp_acl_resp = l2cap_lmp_acl_data_host;
|
|
|
|
dev->device.handle_destroy = l2cap_dummy_destroy;
|
|
}
|
|
|
|
void bt_l2cap_device_done(struct bt_l2cap_device_s *dev)
|
|
{
|
|
bt_device_done(&dev->device);
|
|
|
|
/* Should keep a list of all instances and go through it and
|
|
* invoke l2cap_teardown() for each. */
|
|
}
|
|
|
|
void bt_l2cap_psm_register(struct bt_l2cap_device_s *dev, int psm, int min_mtu,
|
|
int (*new_channel)(struct bt_l2cap_device_s *dev,
|
|
struct bt_l2cap_conn_params_s *params))
|
|
{
|
|
struct bt_l2cap_psm_s *new_psm = l2cap_psm(dev, psm);
|
|
|
|
if (new_psm) {
|
|
fprintf(stderr, "%s: PSM %04x already registered for device `%s'.\n",
|
|
__FUNCTION__, psm, dev->device.lmp_name);
|
|
exit(-1);
|
|
}
|
|
|
|
new_psm = qemu_mallocz(sizeof(*new_psm));
|
|
new_psm->psm = psm;
|
|
new_psm->min_mtu = min_mtu;
|
|
new_psm->new_channel = new_channel;
|
|
new_psm->next = dev->first_psm;
|
|
dev->first_psm = new_psm;
|
|
}
|