diff options
Diffstat (limited to 'hw/bt/l2cap.c')
| -rw-r--r-- | hw/bt/l2cap.c | 1365 |
1 files changed, 1365 insertions, 0 deletions
diff --git a/hw/bt/l2cap.c b/hw/bt/l2cap.c new file mode 100644 index 0000000000..521587a112 --- /dev/null +++ b/hw/bt/l2cap.c @@ -0,0 +1,1365 @@ +/* + * 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) + qemu_mod_timer(ch->retransmission_timer); + else + qemu_del_timer(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) + qemu_mod_timer(ch->monitor_timer); + else + qemu_del_timer(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); + + 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; +} |