static void rfcomm_ua_recv(struct bthost *bthost, struct btconn *conn,
struct l2conn *l2conn, const void *data,
uint16_t len)
{
const struct rfcomm_cmd *ua_hdr = data;
uint8_t channel = RFCOMM_GET_CHANNEL(ua_hdr->address);
struct rfcomm_connection_data *conn_data = bthost->rfcomm_conn_data;
uint8_t type = RFCOMM_GET_TYPE(ua_hdr->control);
uint8_t buf[14];
struct rfcomm_hdr *hdr;
struct rfcomm_mcc *mcc;
struct rfcomm_pn *pn_cmd;
if (channel && conn_data && conn_data->channel == channel) {
if (conn_data->cb)
conn_data->cb(conn->handle, l2conn->scid,
conn_data->user_data, true);
free(bthost->rfcomm_conn_data);
bthost->rfcomm_conn_data = NULL;
return;
}
if (!conn_data || !RFCOMM_TEST_CR(type))
return;
memset(buf, 0, sizeof(buf));
hdr = (struct rfcomm_hdr *) buf;
mcc = (struct rfcomm_mcc *) (buf + sizeof(*hdr));
pn_cmd = (struct rfcomm_pn *) (buf + sizeof(*hdr) + sizeof(*mcc));
hdr->address = RFCOMM_ADDR(1, 0);
hdr->control = RFCOMM_CTRL(RFCOMM_UIH, 0);
hdr->length = RFCOMM_LEN8(sizeof(*mcc) + sizeof(*pn_cmd));
mcc->type = RFCOMM_MCC_TYPE(1, RFCOMM_PN);
mcc->length = RFCOMM_LEN8(sizeof(*pn_cmd));
pn_cmd->dlci = conn_data->channel * 2;
pn_cmd->priority = 7;
pn_cmd->ack_timer = 0;
pn_cmd->max_retrans = 0;
pn_cmd->mtu = 667;
pn_cmd->credits = 7;
buf[sizeof(*hdr) + sizeof(*mcc) + sizeof(*pn_cmd)] = rfcomm_fcs(buf);
send_acl(bthost, conn->handle, l2conn->dcid, buf, sizeof(buf));
}
static void rfcomm_dm_recv(struct bthost *bthost, struct btconn *conn,
struct l2conn *l2conn, const void *data,
uint16_t len)
{
const struct rfcomm_cmd *hdr = data;
uint8_t channel = RFCOMM_GET_CHANNEL(hdr->address);
struct rfcomm_connection_data *conn_data = bthost->rfcomm_conn_data;
if (conn_data && conn_data->channel == channel) {
if (conn_data->cb)
conn_data->cb(conn->handle, l2conn->scid,
conn_data->user_data, false);
free(bthost->rfcomm_conn_data);
bthost->rfcomm_conn_data = NULL;
}
}
static void rfcomm_sabm_recv(struct bthost *bthost, struct btconn *conn,
struct l2conn *l2conn, const void *data,
uint16_t len)
{
const struct rfcomm_cmd *hdr = data;
uint8_t dlci = RFCOMM_GET_DLCI(hdr->address);
struct rfcomm_conn_cb_data *cb;
uint8_t chan = RFCOMM_GET_CHANNEL(hdr->address);
cb = bthost_find_rfcomm_cb_by_channel(bthost, chan);
if (!dlci || cb) {
rfcomm_ua_send(bthost, conn, l2conn, 1, dlci);
if (cb && cb->func)
cb->func(conn->handle, l2conn->scid, cb->user_data,
true);
} else {
rfcomm_dm_send(bthost, conn, l2conn, 1, dlci);
}
}
static bool uih_frame(struct rfcomm_frame *rfcomm_frame, uint8_t indent)
{
uint8_t credits;
struct l2cap_frame *frame = &rfcomm_frame->l2cap_frame;
struct rfcomm_lhdr *hdr = &rfcomm_frame->hdr;
if (!RFCOMM_GET_CHANNEL(hdr->address))
return mcc_frame(rfcomm_frame, indent);
/* fetching credits from UIH frame */
if (GET_PF(hdr->control)) {
if (!l2cap_frame_get_u8(frame, &credits))
return false;
hdr->credits = credits;
print_field("%*cCredits: %d", indent, ' ', hdr->credits);
}
packet_hexdump(frame->data, frame->size);
return true;
}
