/* * ng_hci_misc.c */ /*- * Copyright (c) Maksim Yevmenkin * All rights reserved. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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. * * $Id: ng_hci_misc.c,v 1.5 2003/09/08 18:57:51 max Exp $ * $FreeBSD: src/sys/netgraph/bluetooth/hci/ng_hci_misc.c,v 1.10 2005/01/07 01:45:43 imp Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /****************************************************************************** ****************************************************************************** ** Utility routines ****************************************************************************** ******************************************************************************/ /* * Give packet to RAW hook * Assumes input mbuf is read only. */ void ng_hci_mtap(ng_hci_unit_p unit, struct mbuf *m0) { struct mbuf *m = NULL; int error = 0; if (unit->raw != NULL && NG_HOOK_IS_VALID(unit->raw)) { m = m_dup(m0, M_NOWAIT); if (m != NULL) NG_SEND_DATA_ONLY(error, unit->raw, m); if (error != 0) NG_HCI_INFO( "%s: %s - Could not forward packet, error=%d\n", __func__, NG_NODE_NAME(unit->node), error); } } /* ng_hci_mtap */ /* * Send notification to the upper layer's */ void ng_hci_node_is_up(node_p node, hook_p hook, void *arg1, int arg2) { ng_hci_unit_p unit = NULL; struct ng_mesg *msg = NULL; ng_hci_node_up_ep *ep = NULL; int error; if (node == NULL || NG_NODE_NOT_VALID(node) || hook == NULL || NG_HOOK_NOT_VALID(hook)) return; unit = (ng_hci_unit_p) NG_NODE_PRIVATE(node); if ((unit->state & NG_HCI_UNIT_READY) != NG_HCI_UNIT_READY) return; if (hook != unit->acl && hook != unit->sco) return; NG_MKMESSAGE(msg,NGM_HCI_COOKIE,NGM_HCI_NODE_UP,sizeof(*ep),M_WAITOK | M_NULLOK); if (msg != NULL) { ep = (ng_hci_node_up_ep *)(msg->data); if (hook == unit->acl) { NG_HCI_BUFF_ACL_SIZE(unit->buffer, ep->pkt_size); NG_HCI_BUFF_ACL_TOTAL(unit->buffer, ep->num_pkts); } else { NG_HCI_BUFF_SCO_SIZE(unit->buffer, ep->pkt_size); NG_HCI_BUFF_SCO_TOTAL(unit->buffer, ep->num_pkts); } bcopy(&unit->bdaddr, &ep->bdaddr, sizeof(ep->bdaddr)); NG_SEND_MSG_HOOK(error, node, msg, hook, 0); } else error = ENOMEM; if (error != 0) NG_HCI_INFO( "%s: %s - failed to send NODE_UP message to hook \"%s\", error=%d\n", __func__, NG_NODE_NAME(unit->node), NG_HOOK_NAME(hook), error); } /* ng_hci_node_is_up */ /* * Clean unit (helper) */ void ng_hci_unit_clean(ng_hci_unit_p unit, int reason) { int size; /* Drain command queue */ if (unit->state & NG_HCI_UNIT_COMMAND_PENDING) ng_hci_command_untimeout(unit); NG_BT_MBUFQ_DRAIN(&unit->cmdq); NG_HCI_BUFF_CMD_SET(unit->buffer, 1); /* Clean up connection list */ while (!LIST_EMPTY(&unit->con_list)) { ng_hci_unit_con_p con = LIST_FIRST(&unit->con_list); /* Remove all timeouts (if any) */ if (con->flags & NG_HCI_CON_TIMEOUT_PENDING) ng_hci_con_untimeout(con); /* * Notify upper layer protocol and destroy connection * descriptor. Do not really care about the result. */ ng_hci_lp_discon_ind(con, reason); ng_hci_free_con(con); } NG_HCI_BUFF_ACL_TOTAL(unit->buffer, size); NG_HCI_BUFF_ACL_FREE(unit->buffer, size); NG_HCI_BUFF_SCO_TOTAL(unit->buffer, size); NG_HCI_BUFF_SCO_FREE(unit->buffer, size); /* Clean up neighbors list */ ng_hci_flush_neighbor_cache(unit); } /* ng_hci_unit_clean */ /* * Allocate and link new unit neighbor cache entry */ ng_hci_neighbor_p ng_hci_new_neighbor(ng_hci_unit_p unit) { ng_hci_neighbor_p n = NULL; n = kmalloc(sizeof(*n), M_NETGRAPH_HCI, M_WAITOK | M_NULLOK | M_ZERO); if (n != NULL) { getmicrotime(&n->updated); LIST_INSERT_HEAD(&unit->neighbors, n, next); } return (n); } /* ng_hci_new_neighbor */ /* * Free unit neighbor cache entry */ void ng_hci_free_neighbor(ng_hci_neighbor_p n) { LIST_REMOVE(n, next); bzero(n, sizeof(*n)); kfree(n, M_NETGRAPH_HCI); } /* ng_hci_free_neighbor */ /* * Flush neighbor cache */ void ng_hci_flush_neighbor_cache(ng_hci_unit_p unit) { while (!LIST_EMPTY(&unit->neighbors)) ng_hci_free_neighbor(LIST_FIRST(&unit->neighbors)); } /* ng_hci_flush_neighbor_cache */ /* * Lookup unit in neighbor cache */ ng_hci_neighbor_p ng_hci_get_neighbor(ng_hci_unit_p unit, bdaddr_p bdaddr) { ng_hci_neighbor_p n = NULL; for (n = LIST_FIRST(&unit->neighbors); n != NULL; ) { ng_hci_neighbor_p nn = LIST_NEXT(n, next); if (!ng_hci_neighbor_stale(n)) { if (bcmp(&n->bdaddr, bdaddr, sizeof(*bdaddr)) == 0) break; } else ng_hci_free_neighbor(n); /* remove old entry */ n = nn; } return (n); } /* ng_hci_get_neighbor */ /* * Check if neighbor entry is stale */ int ng_hci_neighbor_stale(ng_hci_neighbor_p n) { struct timeval now; getmicrotime(&now); return (now.tv_sec - n->updated.tv_sec > bluetooth_hci_max_neighbor_age()); } /* ng_hci_neighbor_stale */ /* * Allocate and link new connection descriptor */ ng_hci_unit_con_p ng_hci_new_con(ng_hci_unit_p unit, int link_type) { ng_hci_unit_con_p con = NULL; int num_pkts; static int fake_con_handle = 0x0f00; con = kmalloc(sizeof(*con), M_NETGRAPH_HCI, M_WAITOK | M_NULLOK | M_ZERO); if (con != NULL) { con->unit = unit; con->state = NG_HCI_CON_CLOSED; /* * XXX * * Assign fake connection handle to the connection descriptor. * Bluetooth specification marks 0x0f00 - 0x0fff connection * handles as reserved. We need this fake connection handles * for timeouts. Connection handle will be passed as argument * to timeout so when timeout happens we can find the right * connection descriptor. We can not pass pointers, because * timeouts are external (to Netgraph) events and there might * be a race when node/hook goes down and timeout event already * went into node's queue */ con->con_handle = fake_con_handle ++; if (fake_con_handle > 0x0fff) fake_con_handle = 0x0f00; con->link_type = link_type; if (con->link_type == NG_HCI_LINK_ACL) NG_HCI_BUFF_ACL_TOTAL(unit->buffer, num_pkts); else NG_HCI_BUFF_SCO_TOTAL(unit->buffer, num_pkts); NG_BT_ITEMQ_INIT(&con->conq, num_pkts); ng_callout_init(&con->con_timo); LIST_INSERT_HEAD(&unit->con_list, con, next); } return (con); } /* ng_hci_new_con */ /* * Free connection descriptor */ void ng_hci_free_con(ng_hci_unit_con_p con) { LIST_REMOVE(con, next); /* * If we have pending packets then assume that Host Controller has * flushed these packets and we can free them too */ if (con->link_type == NG_HCI_LINK_ACL) NG_HCI_BUFF_ACL_FREE(con->unit->buffer, con->pending); else NG_HCI_BUFF_SCO_FREE(con->unit->buffer, con->pending); NG_BT_ITEMQ_DESTROY(&con->conq); bzero(con, sizeof(*con)); kfree(con, M_NETGRAPH_HCI); } /* ng_hci_free_con */ /* * Lookup connection for given unit and connection handle. */ ng_hci_unit_con_p ng_hci_con_by_handle(ng_hci_unit_p unit, int con_handle) { ng_hci_unit_con_p con = NULL; LIST_FOREACH(con, &unit->con_list, next) if (con->con_handle == con_handle) break; return (con); } /* ng_hci_con_by_handle */ /* * Lookup connection for given unit, link type and remove unit address */ ng_hci_unit_con_p ng_hci_con_by_bdaddr(ng_hci_unit_p unit, bdaddr_p bdaddr, int link_type) { ng_hci_unit_con_p con = NULL; LIST_FOREACH(con, &unit->con_list, next) if (con->link_type == link_type && bcmp(&con->bdaddr, bdaddr, sizeof(bdaddr_t)) == 0) break; return (con); } /* ng_hci_con_by_bdaddr */ /* * Set HCI command timeout * XXX FIXME: check return code from ng_callout */ int ng_hci_command_timeout(ng_hci_unit_p unit) { if (unit->state & NG_HCI_UNIT_COMMAND_PENDING) panic( "%s: %s - Duplicated command timeout!\n", __func__, NG_NODE_NAME(unit->node)); unit->state |= NG_HCI_UNIT_COMMAND_PENDING; ng_callout(&unit->cmd_timo, unit->node, NULL, bluetooth_hci_command_timeout(), ng_hci_process_command_timeout, NULL, 0); return (0); } /* ng_hci_command_timeout */ /* * Unset HCI command timeout */ int ng_hci_command_untimeout(ng_hci_unit_p unit) { if (!(unit->state & NG_HCI_UNIT_COMMAND_PENDING)) panic( "%s: %s - No command timeout!\n", __func__, NG_NODE_NAME(unit->node)); if (ng_uncallout(&unit->cmd_timo, unit->node) == 0) return (ETIMEDOUT); unit->state &= ~NG_HCI_UNIT_COMMAND_PENDING; return (0); } /* ng_hci_command_untimeout */ /* * Set HCI connection timeout * XXX FIXME: check return code from ng_callout */ int ng_hci_con_timeout(ng_hci_unit_con_p con) { if (con->flags & NG_HCI_CON_TIMEOUT_PENDING) panic( "%s: %s - Duplicated connection timeout!\n", __func__, NG_NODE_NAME(con->unit->node)); con->flags |= NG_HCI_CON_TIMEOUT_PENDING; ng_callout(&con->con_timo, con->unit->node, NULL, bluetooth_hci_connect_timeout(), ng_hci_process_con_timeout, NULL, con->con_handle); return (0); } /* ng_hci_con_timeout */ /* * Unset HCI connection timeout */ int ng_hci_con_untimeout(ng_hci_unit_con_p con) { if (!(con->flags & NG_HCI_CON_TIMEOUT_PENDING)) panic( "%s: %s - No connection timeout!\n", __func__, NG_NODE_NAME(con->unit->node)); if (ng_uncallout(&con->con_timo, con->unit->node) == 0) return (ETIMEDOUT); con->flags &= ~NG_HCI_CON_TIMEOUT_PENDING; return (0); } /* ng_hci_con_untimeout */ #if 0 /* * Convert numeric error code/reason to a string */ char const * const ng_hci_str_error(u_int16_t code) { #define LAST_ERROR_CODE (NELEM(s)-1) static char const * const s[] = { /* 0x00 */ "No error", /* 0x01 */ "Unknown HCI command", /* 0x02 */ "No connection", /* 0x03 */ "Hardware failure", /* 0x04 */ "Page timeout", /* 0x05 */ "Authentication failure", /* 0x06 */ "Key missing", /* 0x07 */ "Memory full", /* 0x08 */ "Connection timeout", /* 0x09 */ "Max number of connections", /* 0x0a */ "Max number of SCO connections to a unit", /* 0x0b */ "ACL connection already exists", /* 0x0c */ "Command disallowed", /* 0x0d */ "Host rejected due to limited resources", /* 0x0e */ "Host rejected due to securiity reasons", /* 0x0f */ "Host rejected due to remote unit is a personal unit", /* 0x10 */ "Host timeout", /* 0x11 */ "Unsupported feature or parameter value", /* 0x12 */ "Invalid HCI command parameter", /* 0x13 */ "Other end terminated connection: User ended connection", /* 0x14 */ "Other end terminated connection: Low resources", /* 0x15 */ "Other end terminated connection: About to power off", /* 0x16 */ "Connection terminated by local host", /* 0x17 */ "Repeated attempts", /* 0x18 */ "Pairing not allowed", /* 0x19 */ "Unknown LMP PDU", /* 0x1a */ "Unsupported remote feature", /* 0x1b */ "SCO offset rejected", /* 0x1c */ "SCO interval rejected", /* 0x1d */ "SCO air mode rejected", /* 0x1e */ "Invalid LMP parameters", /* 0x1f */ "Unspecified error", /* 0x20 */ "Unsupported LMP parameter value", /* 0x21 */ "Role change not allowed", /* 0x22 */ "LMP response timeout", /* 0x23 */ "LMP error transaction collision", /* 0x24 */ "LMP PSU not allowed", /* 0x25 */ "Encryption mode not acceptable", /* 0x26 */ "Unit key used", /* 0x27 */ "QoS is not supported", /* 0x28 */ "Instant passed", /* 0x29 */ "Paring with unit key not supported", /* SHOULD ALWAYS BE LAST */ "Unknown error" }; return ((code >= LAST_ERROR_CODE)? s[LAST_ERROR_CODE] : s[code]); } /* ng_hci_str_error */ #endif