/* $OpenBSD: bthidev.c,v 1.8 2010/08/05 13:13:17 miod Exp $ */ /* $NetBSD: bthidev.c,v 1.16 2008/08/06 15:01:23 plunky Exp $ */ /*- * Copyright (c) 2006 Itronix Inc. * All rights reserved. * * Written by Iain Hibbert for Itronix Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of Itronix Inc. may not be used to endorse * or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define MAX_DESCRIPTOR_LEN 1024 /* sanity check */ /* bthidev softc */ struct bthidev_softc { struct btdev sc_btdev; /* base device */ uint16_t sc_state; uint16_t sc_flags; bdaddr_t sc_laddr; /* local address */ bdaddr_t sc_raddr; /* remote address */ int sc_mode; /* link mode */ void *sc_desc; /* HID descriptor */ int sc_dlen; /* descriptor length */ uint16_t sc_ctlpsm; /* control PSM */ struct l2cap_channel *sc_ctl; /* control channel */ struct l2cap_channel *sc_ctl_l; /* control listen */ uint16_t sc_intpsm; /* interrupt PSM */ struct l2cap_channel *sc_int; /* interrupt channel */ struct l2cap_channel *sc_int_l; /* interrupt listen */ LIST_HEAD(,bthidev) sc_list; /* child list */ struct timeout sc_reconnect; int sc_attempts; /* connection attempts */ }; /* sc_flags */ #define BTHID_RECONNECT (1 << 0) /* reconnect on link loss */ #define BTHID_CONNECTING (1 << 1) /* we are connecting */ /* device state */ #define BTHID_CLOSED 0 #define BTHID_WAIT_CTL 1 #define BTHID_WAIT_INT 2 #define BTHID_OPEN 3 #define BTHID_RETRY_INTERVAL 5 /* seconds between connection attempts */ /* bthidev internals */ void bthidev_timeout(void *); int bthidev_listen(struct bthidev_softc *); int bthidev_connect(struct bthidev_softc *); int bthidev_output(struct bthidev *, uint8_t *, int, int); void bthidev_null(struct bthidev *, uint8_t *, int); /* autoconf(9) glue */ int bthidev_match(struct device *, void *, void *); void bthidev_attach(struct device *, struct device *, void *); int bthidev_detach(struct device *, int); int bthidev_print(void *, const char *); int bthidevsubmatch(struct device *parent, void *, void *); struct cfdriver bthidev_cd = { NULL, "bthidev", DV_DULL }; const struct cfattach bthidev_ca = { sizeof(struct bthidev_softc), bthidev_match, bthidev_attach, bthidev_detach, }; /* bluetooth(9) protocol methods for L2CAP */ void bthidev_connecting(void *); void bthidev_ctl_connected(void *); void bthidev_int_connected(void *); void bthidev_ctl_disconnected(void *, int); void bthidev_int_disconnected(void *, int); void *bthidev_ctl_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); void *bthidev_int_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); void bthidev_complete(void *, int); void bthidev_linkmode(void *, int); void bthidev_input(void *, struct mbuf *); const struct btproto bthidev_ctl_proto = { bthidev_connecting, bthidev_ctl_connected, bthidev_ctl_disconnected, bthidev_ctl_newconn, bthidev_complete, bthidev_linkmode, bthidev_input, }; const struct btproto bthidev_int_proto = { bthidev_connecting, bthidev_int_connected, bthidev_int_disconnected, bthidev_int_newconn, bthidev_complete, bthidev_linkmode, bthidev_input, }; /***************************************************************************** * * bthidev autoconf(9) routines */ int bthidev_match(struct device *self, void *match, void *aux) { struct btdev_attach_args *bda = (struct btdev_attach_args *)aux; if (bda->bd_type != BTDEV_HID) return 0; return 1; } void bthidev_attach(struct device *parent, struct device *self, void *aux) { struct bthidev_softc *sc = (struct bthidev_softc *)self; struct btdev_attach_args *bda = (struct btdev_attach_args *)aux; struct bthidev_attach_args bha; struct bthidev *hidev; struct hid_data *d; struct hid_item h; int maxid, rep; /* * Init softc */ LIST_INIT(&sc->sc_list); timeout_set(&sc->sc_reconnect, bthidev_timeout, sc); sc->sc_state = BTHID_CLOSED; sc->sc_flags = BTHID_CONNECTING; sc->sc_ctlpsm = L2CAP_PSM_HID_CNTL; sc->sc_intpsm = L2CAP_PSM_HID_INTR; sc->sc_mode = 0; /* * copy in our configuration info */ bdaddr_copy(&sc->sc_laddr, &bda->bd_laddr); bdaddr_copy(&sc->sc_raddr, &bda->bd_raddr); if (bda->bd_mode != BTDEV_MODE_NONE) { if (bda->bd_mode == BTDEV_MODE_AUTH) { sc->sc_mode = L2CAP_LM_AUTH; printf(" auth"); } else if (bda->bd_mode == BTDEV_MODE_ENCRYPT) { sc->sc_mode = L2CAP_LM_ENCRYPT; printf(" encrypt"); } else if (bda->bd_mode == BTDEV_MODE_SECURE) { sc->sc_mode = L2CAP_LM_SECURE; printf(" secure"); } else { printf(" unknown link-mode: %d\n", bda->bd_mode); return; } } if (!L2CAP_PSM_INVALID(bda->bd_hid.hid_ctl)) sc->sc_ctlpsm = bda->bd_hid.hid_ctl; if (!L2CAP_PSM_INVALID(bda->bd_hid.hid_int)) sc->sc_intpsm = bda->bd_hid.hid_int; if (bda->bd_hid.hid_flags & BTHID_INITIATE) sc->sc_flags |= BTHID_RECONNECT; if (bda->bd_hid.hid_desc == NULL || bda->bd_hid.hid_dlen == 0 || bda->bd_hid.hid_dlen > MAX_DESCRIPTOR_LEN) { printf(": no descriptor\n"); return; } sc->sc_dlen = bda->bd_hid.hid_dlen; sc->sc_desc = malloc(bda->bd_hid.hid_dlen, M_BTHIDEV, M_WAITOK); if (sc->sc_desc == NULL) { printf(": no memory\n"); return; } if (copyin(bda->bd_hid.hid_desc, sc->sc_desc, bda->bd_hid.hid_dlen)) { free(sc->sc_desc, M_BTHIDEV); printf(": no descriptor"); return; } /* * Parse the descriptor and attach child devices, one per report. */ maxid = -1; h.report_ID = 0; d = hid_start_parse(sc->sc_desc, sc->sc_dlen, hid_none); while (hid_get_item(d, &h)) { if (h.report_ID > maxid) maxid = h.report_ID; } hid_end_parse(d); if (maxid < 0) { printf(": no reports found\n"); return; } printf("\n"); for (rep = 0 ; rep <= maxid ; rep++) { if (hid_report_size(sc->sc_desc, sc->sc_dlen, hid_feature, rep) == 0 && hid_report_size(sc->sc_desc, sc->sc_dlen, hid_input, rep) == 0 && hid_report_size(sc->sc_desc, sc->sc_dlen, hid_output, rep) == 0) continue; bha.ba_desc = sc->sc_desc; bha.ba_dlen = sc->sc_dlen; bha.ba_input = bthidev_null; bha.ba_feature = bthidev_null; bha.ba_output = bthidev_output; bha.ba_id = rep; hidev = (struct bthidev *)config_found_sm(self, &bha, bthidev_print, bthidevsubmatch); if (hidev != NULL) { hidev->sc_parent = &sc->sc_btdev; hidev->sc_id = rep; hidev->sc_input = bha.ba_input; hidev->sc_feature = bha.ba_feature; LIST_INSERT_HEAD(&sc->sc_list, hidev, sc_next); } } /* * start bluetooth connections */ mutex_enter(&bt_lock); if ((sc->sc_flags & BTHID_RECONNECT) == 0) bthidev_listen(sc); if (sc->sc_flags & BTHID_CONNECTING) bthidev_connect(sc); mutex_exit(&bt_lock); } int bthidev_detach(struct device *self, int flags) { struct bthidev_softc *sc = (struct bthidev_softc *)self; struct bthidev *hidev; mutex_enter(&bt_lock); sc->sc_flags = 0; /* disable reconnecting */ /* release interrupt listen */ if (sc->sc_int_l != NULL) { l2cap_detach(&sc->sc_int_l); sc->sc_int_l = NULL; } /* release control listen */ if (sc->sc_ctl_l != NULL) { l2cap_detach(&sc->sc_ctl_l); sc->sc_ctl_l = NULL; } /* close interrupt channel */ if (sc->sc_int != NULL) { l2cap_disconnect(sc->sc_int, 0); l2cap_detach(&sc->sc_int); sc->sc_int = NULL; } /* close control channel */ if (sc->sc_ctl != NULL) { l2cap_disconnect(sc->sc_ctl, 0); l2cap_detach(&sc->sc_ctl); sc->sc_ctl = NULL; } /* remove timeout */ timeout_del(&sc->sc_reconnect); mutex_exit(&bt_lock); /* detach children */ while ((hidev = LIST_FIRST(&sc->sc_list)) != NULL) { LIST_REMOVE(hidev, sc_next); config_detach(&hidev->sc_dev, flags); } /* release descriptor */ if (sc->sc_desc != NULL) { free(sc->sc_desc, M_BTHIDEV); sc->sc_desc = NULL; } return 0; } /* * bthidev config print */ int bthidev_print(void *aux, const char *pnp) { struct bthidev_attach_args *ba = aux; if (pnp != NULL) printf("%s:", pnp); if (ba->ba_id > 0) printf(" reportid %d", ba->ba_id); return UNCONF; } int bthidevsubmatch(struct device *parent, void *match, void *aux) { struct bthidev_attach_args *ba = aux; struct cfdata *cf = match; if (cf->bthidevcf_reportid != BTHIDEV_UNK_REPORTID && cf->bthidevcf_reportid != ba->ba_id) return (0); return ((*cf->cf_attach->ca_match)(parent, cf, aux)); } /***************************************************************************** * * bluetooth(4) HID attach/detach routines */ /* * callouts are scheduled after connections have been lost, in order * to clean up and reconnect. */ void bthidev_timeout(void *arg) { struct bthidev_softc *sc = arg; mutex_enter(&bt_lock); switch (sc->sc_state) { case BTHID_CLOSED: if (sc->sc_int != NULL) { l2cap_disconnect(sc->sc_int, 0); break; } if (sc->sc_ctl != NULL) { l2cap_disconnect(sc->sc_ctl, 0); break; } if (sc->sc_flags & BTHID_RECONNECT) { sc->sc_flags |= BTHID_CONNECTING; bthidev_connect(sc); break; } break; case BTHID_WAIT_CTL: break; case BTHID_WAIT_INT: break; case BTHID_OPEN: break; default: break; } mutex_exit(&bt_lock); } /* * listen for our device */ int bthidev_listen(struct bthidev_softc *sc) { struct sockaddr_bt sa; int err; memset(&sa, 0, sizeof(sa)); sa.bt_len = sizeof(sa); sa.bt_family = AF_BLUETOOTH; bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); /* * Listen on control PSM */ err = l2cap_attach(&sc->sc_ctl_l, &bthidev_ctl_proto, sc); if (err) return err; err = l2cap_setlinkmode(sc->sc_ctl_l, sc->sc_mode); if (err) return err; sa.bt_psm = sc->sc_ctlpsm; err = l2cap_bind(sc->sc_ctl_l, &sa); if (err) return err; err = l2cap_listen(sc->sc_ctl_l); if (err) return err; /* * Listen on interrupt PSM */ err = l2cap_attach(&sc->sc_int_l, &bthidev_int_proto, sc); if (err) return err; err = l2cap_setlinkmode(sc->sc_int_l, sc->sc_mode); if (err) return err; sa.bt_psm = sc->sc_intpsm; err = l2cap_bind(sc->sc_int_l, &sa); if (err) return err; err = l2cap_listen(sc->sc_int_l); if (err) return err; sc->sc_state = BTHID_WAIT_CTL; return 0; } /* * start connecting to our device */ int bthidev_connect(struct bthidev_softc *sc) { struct sockaddr_bt sa; int err; if (sc->sc_attempts++ > 0) printf("%s: connect (#%d)\n", sc->sc_btdev.sc_dev.dv_xname, sc->sc_attempts); memset(&sa, 0, sizeof(sa)); sa.bt_len = sizeof(sa); sa.bt_family = AF_BLUETOOTH; err = l2cap_attach(&sc->sc_ctl, &bthidev_ctl_proto, sc); if (err) { printf("%s: l2cap_attach failed (%d)\n", sc->sc_btdev.sc_dev.dv_xname, err); return err; } err = l2cap_setlinkmode(sc->sc_ctl, sc->sc_mode); if (err) return err; bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); err = l2cap_bind(sc->sc_ctl, &sa); if (err) { printf("%s: l2cap_bind failed (%d)\n", sc->sc_btdev.sc_dev.dv_xname, err); return err; } sa.bt_psm = sc->sc_ctlpsm; bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr); err = l2cap_connect(sc->sc_ctl, &sa); if (err) { printf("%s: l2cap_connect failed (%d)\n", sc->sc_btdev.sc_dev.dv_xname, err); return err; } sc->sc_state = BTHID_WAIT_CTL; return 0; } /***************************************************************************** * * bluetooth(9) callback methods for L2CAP * * All these are called from Bluetooth Protocol code, in a soft * interrupt context at IPL_SOFTNET. */ void bthidev_connecting(void *arg) { /* don't care */ } void bthidev_ctl_connected(void *arg) { struct sockaddr_bt sa; struct bthidev_softc *sc = arg; int err; if (sc->sc_state != BTHID_WAIT_CTL) return; KASSERT(sc->sc_ctl != NULL); KASSERT(sc->sc_int == NULL); if (sc->sc_flags & BTHID_CONNECTING) { /* initiate connect on interrupt PSM */ err = l2cap_attach(&sc->sc_int, &bthidev_int_proto, sc); if (err) goto fail; err = l2cap_setlinkmode(sc->sc_int, sc->sc_mode); if (err) goto fail; memset(&sa, 0, sizeof(sa)); sa.bt_len = sizeof(sa); sa.bt_family = AF_BLUETOOTH; bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); err = l2cap_bind(sc->sc_int, &sa); if (err) goto fail; sa.bt_psm = sc->sc_intpsm; bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr); err = l2cap_connect(sc->sc_int, &sa); if (err) goto fail; } sc->sc_state = BTHID_WAIT_INT; return; fail: l2cap_detach(&sc->sc_ctl); sc->sc_ctl = NULL; printf("%s: connect failed (%d)\n", sc->sc_btdev.sc_dev.dv_xname, err); } void bthidev_int_connected(void *arg) { struct bthidev_softc *sc = arg; if (sc->sc_state != BTHID_WAIT_INT) return; KASSERT(sc->sc_ctl != NULL); KASSERT(sc->sc_int != NULL); sc->sc_attempts = 0; sc->sc_flags &= ~BTHID_CONNECTING; sc->sc_state = BTHID_OPEN; printf("%s: connected\n", sc->sc_btdev.sc_dev.dv_xname); } /* * Disconnected * * Depending on our state, this could mean several things, but essentially * we are lost. If both channels are closed, and we are marked to reconnect, * schedule another try otherwise just give up. They will contact us. */ void bthidev_ctl_disconnected(void *arg, int err) { struct bthidev_softc *sc = arg; if (sc->sc_ctl != NULL) { l2cap_detach(&sc->sc_ctl); sc->sc_ctl = NULL; } sc->sc_state = BTHID_CLOSED; if (sc->sc_int == NULL) { printf("%s: disconnected\n", sc->sc_btdev.sc_dev.dv_xname); sc->sc_flags &= ~BTHID_CONNECTING; if (sc->sc_flags & BTHID_RECONNECT) timeout_add_sec(&sc->sc_reconnect, BTHID_RETRY_INTERVAL); else sc->sc_state = BTHID_WAIT_CTL; } else { /* * The interrupt channel should have been closed first, * but its potentially unsafe to detach that from here. * Give them a second to do the right thing or let the * callout handle it. */ timeout_add_sec(&sc->sc_reconnect, 1); } } void bthidev_int_disconnected(void *arg, int err) { struct bthidev_softc *sc = arg; if (sc->sc_int != NULL) { l2cap_detach(&sc->sc_int); sc->sc_int = NULL; } sc->sc_state = BTHID_CLOSED; if (sc->sc_ctl == NULL) { printf("%s: disconnected\n", sc->sc_btdev.sc_dev.dv_xname); sc->sc_flags &= ~BTHID_CONNECTING; if (sc->sc_flags & BTHID_RECONNECT) timeout_add_sec(&sc->sc_reconnect, BTHID_RETRY_INTERVAL); else sc->sc_state = BTHID_WAIT_CTL; } else { /* * The control channel should be closing also, allow * them a chance to do that before we force it. */ timeout_add_sec(&sc->sc_reconnect, 1); } } /* * New Connections * * We give a new L2CAP handle back if this matches the BDADDR we are * listening for and we are in the right state. bthidev_connected will * be called when the connection is open, so nothing else to do here */ void * bthidev_ctl_newconn(void *arg, struct sockaddr_bt *laddr, struct sockaddr_bt *raddr) { struct bthidev_softc *sc = arg; if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0 || (sc->sc_flags & BTHID_CONNECTING) || sc->sc_state != BTHID_WAIT_CTL || sc->sc_ctl != NULL || sc->sc_int != NULL) return NULL; l2cap_attach(&sc->sc_ctl, &bthidev_ctl_proto, sc); return sc->sc_ctl; } void * bthidev_int_newconn(void *arg, struct sockaddr_bt *laddr, struct sockaddr_bt *raddr) { struct bthidev_softc *sc = arg; if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0 || (sc->sc_flags & BTHID_CONNECTING) || sc->sc_state != BTHID_WAIT_INT || sc->sc_ctl == NULL || sc->sc_int != NULL) return NULL; l2cap_attach(&sc->sc_int, &bthidev_int_proto, sc); return sc->sc_int; } void bthidev_complete(void *arg, int count) { /* dont care */ } void bthidev_linkmode(void *arg, int new) { struct bthidev_softc *sc = arg; if ((sc->sc_mode & L2CAP_LM_AUTH) && !(new & L2CAP_LM_AUTH)) printf("%s: auth failed\n", sc->sc_btdev.sc_dev.dv_xname); else if ((sc->sc_mode & L2CAP_LM_ENCRYPT) && !(new & L2CAP_LM_ENCRYPT)) printf("%s: encrypt off\n", sc->sc_btdev.sc_dev.dv_xname); else if ((sc->sc_mode & L2CAP_LM_SECURE) && !(new & L2CAP_LM_SECURE)) printf("%s: insecure\n", sc->sc_btdev.sc_dev.dv_xname); else return; if (sc->sc_int != NULL) l2cap_disconnect(sc->sc_int, 0); if (sc->sc_ctl != NULL) l2cap_disconnect(sc->sc_ctl, 0); } /* * Receive reports from the protocol stack. */ void bthidev_input(void *arg, struct mbuf *m) { struct bthidev_softc *sc = arg; struct bthidev *hidev; uint8_t *data; int len; if (sc->sc_state != BTHID_OPEN) goto release; if (m->m_pkthdr.len > m->m_len) printf("%s: truncating HID report\n", sc->sc_btdev.sc_dev.dv_xname); len = m->m_len; data = mtod(m, uint8_t *); if (BTHID_TYPE(data[0]) == BTHID_DATA) { /* * data[0] == type / parameter * data[1] == id * data[2..len] == report */ if (len < 3) goto release; LIST_FOREACH(hidev, &sc->sc_list, sc_next) { if (data[1] == hidev->sc_id) { switch (BTHID_DATA_PARAM(data[0])) { case BTHID_DATA_INPUT: (*hidev->sc_input)(hidev, data + 2, len - 2); break; case BTHID_DATA_FEATURE: (*hidev->sc_feature)(hidev, data + 2, len - 2); break; default: break; } goto release; } } printf("%s: report id %d, len = %d ignored\n", sc->sc_btdev.sc_dev.dv_xname, data[1], len - 2); goto release; } if (BTHID_TYPE(data[0]) == BTHID_CONTROL) { if (len < 1) goto release; if (BTHID_DATA_PARAM(data[0]) == BTHID_CONTROL_UNPLUG) { printf("%s: unplugged\n", sc->sc_btdev.sc_dev.dv_xname); /* close interrupt channel */ if (sc->sc_int != NULL) { l2cap_disconnect(sc->sc_int, 0); l2cap_detach(&sc->sc_int); sc->sc_int = NULL; } /* close control channel */ if (sc->sc_ctl != NULL) { l2cap_disconnect(sc->sc_ctl, 0); l2cap_detach(&sc->sc_ctl); sc->sc_ctl = NULL; } } goto release; } release: m_freem(m); } /***************************************************************************** * * IO routines */ void bthidev_null(struct bthidev *hidev, uint8_t *report, int len) { /* * empty routine just in case the device * provided no method to handle this report */ } int bthidev_output(struct bthidev *hidev, uint8_t *report, int rlen, int nolock) { struct bthidev_softc *sc = (struct bthidev_softc *)hidev->sc_parent; struct mbuf *m; int err; if (sc == NULL || sc->sc_state != BTHID_OPEN) return ENOTCONN; KASSERT(sc->sc_ctl != NULL); KASSERT(sc->sc_int != NULL); if (rlen == 0 || report == NULL) return 0; if (rlen > MHLEN - 2) { printf("%s: output report too long (%d)!\n", sc->sc_btdev.sc_dev.dv_xname, rlen); return EMSGSIZE; } m = m_gethdr(M_DONTWAIT, MT_DATA); if (m == NULL) return ENOMEM; /* * data[0] = type / parameter * data[1] = id * data[2..N] = report */ mtod(m, uint8_t *)[0] = (uint8_t)((BTHID_DATA << 4) | BTHID_DATA_OUTPUT); mtod(m, uint8_t *)[1] = hidev->sc_id; memcpy(mtod(m, uint8_t *) + 2, report, rlen); m->m_pkthdr.len = m->m_len = rlen + 2; if (!nolock) mutex_enter(&bt_lock); err = l2cap_send(sc->sc_int, m); if (!nolock) mutex_exit(&bt_lock); return err; }