--- /dev/null
+/*
+ * QEMU Bluetooth L2CAP logic.
+ *
+ * Copyright (C) 2008 Andrzej Zaborowski <balrog@zabor.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu-common.h"
+#include "qemu/timer.h"
+#include "hw/bt.h"
+
+#define L2CAP_CID_MAX 0x100 /* Between 0x40 and 0x10000 */
+
+struct l2cap_instance_s {
+ struct bt_link_s *link;
+ struct bt_l2cap_device_s *dev;
+ int role;
+
+ uint8_t frame_in[65535 + L2CAP_HDR_SIZE] __attribute__ ((aligned (4)));
+ int frame_in_len;
+
+ uint8_t frame_out[65535 + L2CAP_HDR_SIZE] __attribute__ ((aligned (4)));
+ int frame_out_len;
+
+ /* Signalling channel timers. They exist per-request but we can make
+ * sure we have no more than one outstanding request at any time. */
+ QEMUTimer *rtx;
+ QEMUTimer *ertx;
+
+ int last_id;
+ int next_id;
+
+ struct l2cap_chan_s {
+ struct bt_l2cap_conn_params_s params;
+
+ void (*frame_in)(struct l2cap_chan_s *chan, uint16_t cid,
+ const l2cap_hdr *hdr, int len);
+ int mps;
+ int min_mtu;
+
+ struct l2cap_instance_s *l2cap;
+
+ /* Only allocated channels */
+ uint16_t remote_cid;
+#define L2CAP_CFG_INIT 2
+#define L2CAP_CFG_ACC 1
+ int config_req_id; /* TODO: handle outgoing requests generically */
+ int config;
+
+ /* Only connection-oriented channels. Note: if we allow the tx and
+ * rx traffic to be in different modes at any time, we need two. */
+ int mode;
+
+ /* Only flow-controlled, connection-oriented channels */
+ uint8_t sdu[65536]; /* TODO: dynamically allocate */
+ int len_cur, len_total;
+ int rexmit;
+ int monitor_timeout;
+ QEMUTimer *monitor_timer;
+ QEMUTimer *retransmission_timer;
+ } *cid[L2CAP_CID_MAX];
+ /* The channel state machine states map as following:
+ * CLOSED -> !cid[N]
+ * WAIT_CONNECT -> never occurs
+ * WAIT_CONNECT_RSP -> never occurs
+ * CONFIG -> cid[N] && config < 3
+ * WAIT_CONFIG -> never occurs, cid[N] && config == 0 && !config_r
+ * WAIT_SEND_CONFIG -> never occurs, cid[N] && config == 1 && !config_r
+ * WAIT_CONFIG_REQ_RSP -> cid[N] && config == 0 && config_req_id
+ * WAIT_CONFIG_RSP -> cid[N] && config == 1 && config_req_id
+ * WAIT_CONFIG_REQ -> cid[N] && config == 2
+ * OPEN -> cid[N] && config == 3
+ * WAIT_DISCONNECT -> never occurs
+ */
+
+ struct l2cap_chan_s signalling_ch;
+ struct l2cap_chan_s group_ch;
+};
+
+struct slave_l2cap_instance_s {
+ struct bt_link_s link; /* Underlying logical link (ACL) */
+ struct l2cap_instance_s l2cap;
+};
+
+struct bt_l2cap_psm_s {
+ int psm;
+ int min_mtu;
+ int (*new_channel)(struct bt_l2cap_device_s *device,
+ struct bt_l2cap_conn_params_s *params);
+ struct bt_l2cap_psm_s *next;
+};
+
+static const uint16_t l2cap_fcs16_table[256] = {
+ 0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241,
+ 0xc601, 0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440,
+ 0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40,
+ 0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841,
+ 0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40,
+ 0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41,
+ 0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641,
+ 0xd201, 0x12c0, 0x1380, 0xd341, 0x1100, 0xd1c1, 0xd081, 0x1040,
+ 0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240,
+ 0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441,
+ 0x3c00, 0xfcc1, 0xfd81, 0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41,
+ 0xfa01, 0x3ac0, 0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840,
+ 0x2800, 0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41,
+ 0xee01, 0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40,
+ 0xe401, 0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640,
+ 0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041,
+ 0xa001, 0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240,
+ 0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441,
+ 0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41,
+ 0xaa01, 0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840,
+ 0x7800, 0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41,
+ 0xbe01, 0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40,
+ 0xb401, 0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640,
+ 0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041,
+ 0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241,
+ 0x9601, 0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440,
+ 0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40,
+ 0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841,
+ 0x8801, 0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40,
+ 0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41,
+ 0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641,
+ 0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040,
+};
+
+static uint16_t l2cap_fcs16(const uint8_t *message, int len)
+{
+ uint16_t fcs = 0x0000;
+
+ while (len --)
+#if 0
+ {
+ int i;
+
+ fcs ^= *message ++;
+ for (i = 8; i; -- i)
+ if (fcs & 1)
+ fcs = (fcs >> 1) ^ 0xa001;
+ else
+ fcs = (fcs >> 1);
+ }
+#else
+ fcs = (fcs >> 8) ^ l2cap_fcs16_table[(fcs ^ *message ++) & 0xff];
+#endif
+
+ return fcs;
+}
+
+/* L2CAP layer logic (protocol) */
+
+static void l2cap_retransmission_timer_update(struct l2cap_chan_s *ch)
+{
+#if 0
+ if (ch->mode != L2CAP_MODE_BASIC && ch->rexmit)
+ timer_mod(ch->retransmission_timer);
+ else
+ timer_del(ch->retransmission_timer);
+#endif
+}
+
+static void l2cap_monitor_timer_update(struct l2cap_chan_s *ch)
+{
+#if 0
+ if (ch->mode != L2CAP_MODE_BASIC && !ch->rexmit)
+ timer_mod(ch->monitor_timer);
+ else
+ timer_del(ch->monitor_timer);
+#endif
+}
+
+static void l2cap_command_reject(struct l2cap_instance_s *l2cap, int id,
+ uint16_t reason, const void *data, int plen)
+{
+ uint8_t *pkt;
+ l2cap_cmd_hdr *hdr;
+ l2cap_cmd_rej *params;
+ uint16_t len;
+
+ reason = cpu_to_le16(reason);
+ len = cpu_to_le16(L2CAP_CMD_REJ_SIZE + plen);
+
+ pkt = l2cap->signalling_ch.params.sdu_out(&l2cap->signalling_ch.params,
+ L2CAP_CMD_HDR_SIZE + L2CAP_CMD_REJ_SIZE + plen);
+ hdr = (void *) (pkt + 0);
+ params = (void *) (pkt + L2CAP_CMD_HDR_SIZE);
+
+ hdr->code = L2CAP_COMMAND_REJ;
+ hdr->ident = id;
+ memcpy(&hdr->len, &len, sizeof(hdr->len));
+ memcpy(¶ms->reason, &reason, sizeof(reason));
+ if (plen)
+ memcpy(pkt + L2CAP_CMD_HDR_SIZE + L2CAP_CMD_REJ_SIZE, data, plen);
+
+ l2cap->signalling_ch.params.sdu_submit(&l2cap->signalling_ch.params);
+}
+
+static void l2cap_command_reject_cid(struct l2cap_instance_s *l2cap, int id,
+ uint16_t reason, uint16_t dcid, uint16_t scid)
+{
+ l2cap_cmd_rej_cid params = {
+ .dcid = dcid,
+ .scid = scid,
+ };
+
+ l2cap_command_reject(l2cap, id, reason, ¶ms, L2CAP_CMD_REJ_CID_SIZE);
+}
+
+static void l2cap_connection_response(struct l2cap_instance_s *l2cap,
+ int dcid, int scid, int result, int status)
+{
+ uint8_t *pkt;
+ l2cap_cmd_hdr *hdr;
+ l2cap_conn_rsp *params;
+
+ pkt = l2cap->signalling_ch.params.sdu_out(&l2cap->signalling_ch.params,
+ L2CAP_CMD_HDR_SIZE + L2CAP_CONN_RSP_SIZE);
+ hdr = (void *) (pkt + 0);
+ params = (void *) (pkt + L2CAP_CMD_HDR_SIZE);
+
+ hdr->code = L2CAP_CONN_RSP;
+ hdr->ident = l2cap->last_id;
+ hdr->len = cpu_to_le16(L2CAP_CONN_RSP_SIZE);
+
+ params->dcid = cpu_to_le16(dcid);
+ params->scid = cpu_to_le16(scid);
+ params->result = cpu_to_le16(result);
+ params->status = cpu_to_le16(status);
+
+ l2cap->signalling_ch.params.sdu_submit(&l2cap->signalling_ch.params);
+}
+
+static void l2cap_configuration_request(struct l2cap_instance_s *l2cap,
+ int dcid, int flag, const uint8_t *data, int len)
+{
+ uint8_t *pkt;
+ l2cap_cmd_hdr *hdr;
+ l2cap_conf_req *params;
+
+ pkt = l2cap->signalling_ch.params.sdu_out(&l2cap->signalling_ch.params,
+ L2CAP_CMD_HDR_SIZE + L2CAP_CONF_REQ_SIZE(len));
+ hdr = (void *) (pkt + 0);
+ params = (void *) (pkt + L2CAP_CMD_HDR_SIZE);
+
+ /* TODO: unify the id sequencing */
+ l2cap->last_id = l2cap->next_id;
+ l2cap->next_id = l2cap->next_id == 255 ? 1 : l2cap->next_id + 1;
+
+ hdr->code = L2CAP_CONF_REQ;
+ hdr->ident = l2cap->last_id;
+ hdr->len = cpu_to_le16(L2CAP_CONF_REQ_SIZE(len));
+
+ params->dcid = cpu_to_le16(dcid);
+ params->flags = cpu_to_le16(flag);
+ if (len)
+ memcpy(params->data, data, len);
+
+ l2cap->signalling_ch.params.sdu_submit(&l2cap->signalling_ch.params);
+}
+
+static void l2cap_configuration_response(struct l2cap_instance_s *l2cap,
+ int scid, int flag, int result, const uint8_t *data, int len)
+{
+ uint8_t *pkt;
+ l2cap_cmd_hdr *hdr;
+ l2cap_conf_rsp *params;
+
+ pkt = l2cap->signalling_ch.params.sdu_out(&l2cap->signalling_ch.params,
+ L2CAP_CMD_HDR_SIZE + L2CAP_CONF_RSP_SIZE(len));
+ hdr = (void *) (pkt + 0);
+ params = (void *) (pkt + L2CAP_CMD_HDR_SIZE);
+
+ hdr->code = L2CAP_CONF_RSP;
+ hdr->ident = l2cap->last_id;
+ hdr->len = cpu_to_le16(L2CAP_CONF_RSP_SIZE(len));
+
+ params->scid = cpu_to_le16(scid);
+ params->flags = cpu_to_le16(flag);
+ params->result = cpu_to_le16(result);
+ if (len)
+ memcpy(params->data, data, len);
+
+ l2cap->signalling_ch.params.sdu_submit(&l2cap->signalling_ch.params);
+}
+
+static void l2cap_disconnection_response(struct l2cap_instance_s *l2cap,
+ int dcid, int scid)
+{
+ uint8_t *pkt;
+ l2cap_cmd_hdr *hdr;
+ l2cap_disconn_rsp *params;
+
+ pkt = l2cap->signalling_ch.params.sdu_out(&l2cap->signalling_ch.params,
+ L2CAP_CMD_HDR_SIZE + L2CAP_DISCONN_RSP_SIZE);
+ hdr = (void *) (pkt + 0);
+ params = (void *) (pkt + L2CAP_CMD_HDR_SIZE);
+
+ hdr->code = L2CAP_DISCONN_RSP;
+ hdr->ident = l2cap->last_id;
+ hdr->len = cpu_to_le16(L2CAP_DISCONN_RSP_SIZE);
+
+ params->dcid = cpu_to_le16(dcid);
+ params->scid = cpu_to_le16(scid);
+
+ l2cap->signalling_ch.params.sdu_submit(&l2cap->signalling_ch.params);
+}
+
+static void l2cap_echo_response(struct l2cap_instance_s *l2cap,
+ const uint8_t *data, int len)
+{
+ uint8_t *pkt;
+ l2cap_cmd_hdr *hdr;
+ uint8_t *params;
+
+ pkt = l2cap->signalling_ch.params.sdu_out(&l2cap->signalling_ch.params,
+ L2CAP_CMD_HDR_SIZE + len);
+ hdr = (void *) (pkt + 0);
+ params = (void *) (pkt + L2CAP_CMD_HDR_SIZE);
+
+ hdr->code = L2CAP_ECHO_RSP;
+ hdr->ident = l2cap->last_id;
+ hdr->len = cpu_to_le16(len);
+
+ memcpy(params, data, len);
+
+ l2cap->signalling_ch.params.sdu_submit(&l2cap->signalling_ch.params);
+}
+
+static void l2cap_info_response(struct l2cap_instance_s *l2cap, int type,
+ int result, const uint8_t *data, int len)
+{
+ uint8_t *pkt;
+ l2cap_cmd_hdr *hdr;
+ l2cap_info_rsp *params;
+
+ pkt = l2cap->signalling_ch.params.sdu_out(&l2cap->signalling_ch.params,
+ L2CAP_CMD_HDR_SIZE + L2CAP_INFO_RSP_SIZE + len);
+ hdr = (void *) (pkt + 0);
+ params = (void *) (pkt + L2CAP_CMD_HDR_SIZE);
+
+ hdr->code = L2CAP_INFO_RSP;
+ hdr->ident = l2cap->last_id;
+ hdr->len = cpu_to_le16(L2CAP_INFO_RSP_SIZE + len);
+
+ params->type = cpu_to_le16(type);
+ params->result = cpu_to_le16(result);
+ if (len)
+ memcpy(params->data, data, len);
+
+ l2cap->signalling_ch.params.sdu_submit(&l2cap->signalling_ch.params);
+}
+
+static uint8_t *l2cap_bframe_out(struct bt_l2cap_conn_params_s *parm, int len);
+static void l2cap_bframe_submit(struct bt_l2cap_conn_params_s *parms);
+#if 0
+static uint8_t *l2cap_iframe_out(struct bt_l2cap_conn_params_s *parm, int len);
+static void l2cap_iframe_submit(struct bt_l2cap_conn_params_s *parm);
+#endif
+static void l2cap_bframe_in(struct l2cap_chan_s *ch, uint16_t cid,
+ const l2cap_hdr *hdr, int len);
+static void l2cap_iframe_in(struct l2cap_chan_s *ch, uint16_t cid,
+ const l2cap_hdr *hdr, int len);
+
+static int l2cap_cid_new(struct l2cap_instance_s *l2cap)
+{
+ int i;
+
+ for (i = L2CAP_CID_ALLOC; i < L2CAP_CID_MAX; i ++)
+ if (!l2cap->cid[i])
+ return i;
+
+ return L2CAP_CID_INVALID;
+}
+
+static inline struct bt_l2cap_psm_s *l2cap_psm(
+ struct bt_l2cap_device_s *device, int psm)
+{
+ struct bt_l2cap_psm_s *ret = device->first_psm;
+
+ while (ret && ret->psm != psm)
+ ret = ret->next;
+
+ return ret;
+}
+
+static struct l2cap_chan_s *l2cap_channel_open(struct l2cap_instance_s *l2cap,
+ int psm, int source_cid)
+{
+ 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 = g_malloc0(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 {
+ g_free(ch);
+ ch = NULL;
+ 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);
+ g_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;
+ }
+ l2cap_sframe_in(ch, le16_to_cpup((void *) hdr->data));
+ return;
+ }
+
+ 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;
+
+ ch->params.sdu_in(ch->params.opaque, hdr->data + 2, len - 4);
+ break;
+
+ 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);
+ ch->params.sdu_in(ch->params.opaque, ch->sdu, ch->len_total);
+ break;
+
+ 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;
+
+ 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);
+ g_free(l2cap->cid[cid]);
+ }
+
+ if (l2cap->role)
+ g_free(l2cap);
+ else
+ g_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 = g_malloc0(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 = g_malloc0(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 = g_malloc0(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;
+}
Code Review / kvmfornfv.git / blobdiff