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freebsd-skq/sys/netgraph/bluetooth/l2cap/ng_l2cap_ulpi.c

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/*
* ng_l2cap_ulpi.c
*/
/*-
* Copyright (c) Maksim Yevmenkin <m_evmenkin@yahoo.com>
* 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_l2cap_ulpi.c,v 1.1 2002/11/24 19:47:06 max Exp $
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/endian.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/queue.h>
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include <netgraph/bluetooth/include/ng_hci.h>
#include <netgraph/bluetooth/include/ng_l2cap.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_var.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_cmds.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_evnt.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_llpi.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_ulpi.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_misc.h>
/******************************************************************************
******************************************************************************
** Upper Layer Protocol Interface module
******************************************************************************
******************************************************************************/
/*
* Process L2CA_Connect request from the upper layer protocol.
*/
int
ng_l2cap_l2ca_con_req(ng_l2cap_p l2cap, struct ng_mesg *msg)
{
ng_l2cap_l2ca_con_ip *ip = NULL;
ng_l2cap_con_p con = NULL;
ng_l2cap_chan_p ch = NULL;
ng_l2cap_cmd_p cmd = NULL;
int error = 0;
/* Check message */
if (msg->header.arglen != sizeof(*ip)) {
NG_L2CAP_ALERT(
"%s: %s - invalid L2CA_Connect request message size, size=%d\n",
__func__, NG_NODE_NAME(l2cap->node),
msg->header.arglen);
error = EMSGSIZE;
goto out;
}
ip = (ng_l2cap_l2ca_con_ip *)(msg->data);
/* Check if we have connection to the remote unit */
con = ng_l2cap_con_by_addr(l2cap, &ip->bdaddr);
if (con == NULL) {
/* Submit LP_ConnectReq to the lower layer */
error = ng_l2cap_lp_con_req(l2cap, &ip->bdaddr);
if (error != 0) {
NG_L2CAP_ERR(
"%s: %s - unable to send LP_ConnectReq message, error=%d\n",
__func__, NG_NODE_NAME(l2cap->node), error);
goto out;
}
/* This should not fail */
con = ng_l2cap_con_by_addr(l2cap, &ip->bdaddr);
KASSERT((con != NULL),
("%s: %s - could not find connection!\n", __func__, NG_NODE_NAME(l2cap->node)));
}
/*
* Create new empty channel descriptor. In case of any failure do
* not touch connection descriptor.
*/
ch = ng_l2cap_new_chan(l2cap, con, ip->psm);
if (ch == NULL) {
error = ENOMEM;
goto out;
}
/* Now create L2CAP_ConnectReq command */
cmd = ng_l2cap_new_cmd(ch->con, ch, ng_l2cap_get_ident(con),
NG_L2CAP_CON_REQ, msg->header.token);
if (cmd == NULL) {
ng_l2cap_free_chan(ch);
error = ENOMEM;
goto out;
}
if (cmd->ident == NG_L2CAP_NULL_IDENT) {
ng_l2cap_free_cmd(cmd);
ng_l2cap_free_chan(ch);
error = EIO;
goto out;
}
/* Create L2CAP command packet */
_ng_l2cap_con_req(cmd->aux, cmd->ident, ch->psm, ch->scid);
if (cmd->aux == NULL) {
ng_l2cap_free_cmd(cmd);
ng_l2cap_free_chan(ch);
error = ENOBUFS;
goto out;
}
ch->state = NG_L2CAP_W4_L2CAP_CON_RSP;
/* Link command to the queue */
ng_l2cap_link_cmd(ch->con, cmd);
ng_l2cap_lp_deliver(ch->con);
out:
return (error);
} /* ng_l2cap_l2ca_con_req */
/*
* Send L2CA_Connect response to the upper layer protocol.
*/
int
ng_l2cap_l2ca_con_rsp(ng_l2cap_chan_p ch, u_int32_t token, u_int16_t result,
u_int16_t status)
{
ng_l2cap_p l2cap = ch->con->l2cap;
struct ng_mesg *msg = NULL;
ng_l2cap_l2ca_con_op *op = NULL;
int error = 0;
/* Check if upstream hook is connected and valid */
if (l2cap->l2c == NULL || NG_HOOK_NOT_VALID(l2cap->l2c)) {
NG_L2CAP_ERR(
"%s: %s - unable to send L2CA_Connect response message. " \
"Hook is not connected or valid, psm=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->psm);
return (ENOTCONN);
}
/* Create and send L2CA_Connect response message */
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_CON,
sizeof(*op), M_NOWAIT);
if (msg == NULL)
error = ENOMEM;
else {
msg->header.token = token;
msg->header.flags |= NGF_RESP;
op = (ng_l2cap_l2ca_con_op *)(msg->data);
/*
* XXX Spec. says we should only populate LCID when result == 0
* What about PENDING? What the heck, for now always populate
* LCID :)
*/
op->lcid = ch->scid;
op->result = result;
op->status = status;
NG_SEND_MSG_HOOK(error, l2cap->node, msg, l2cap->l2c, 0);
}
return (error);
} /* ng_l2cap_l2ca_con_rsp */
/*
* Process L2CA_ConnectRsp request from the upper layer protocol.
*/
int
ng_l2cap_l2ca_con_rsp_req(ng_l2cap_p l2cap, struct ng_mesg *msg)
{
ng_l2cap_l2ca_con_rsp_ip *ip = NULL;
ng_l2cap_con_p con = NULL;
ng_l2cap_chan_p ch = NULL;
ng_l2cap_cmd_p cmd = NULL;
u_int16_t dcid;
int error = 0;
/* Check message */
if (msg->header.arglen != sizeof(*ip)) {
NG_L2CAP_ALERT(
"%s: %s - invalid L2CA_ConnectRsp request message size, size=%d\n",
__func__, NG_NODE_NAME(l2cap->node),
msg->header.arglen);
error = EMSGSIZE;
goto out;
}
ip = (ng_l2cap_l2ca_con_rsp_ip *)(msg->data);
/* Check if we have this channel */
ch = ng_l2cap_chan_by_scid(l2cap, ip->lcid);
if (ch == NULL) {
NG_L2CAP_ALERT(
"%s: %s - unexpected L2CA_ConnectRsp request message. " \
"Channel does not exist, lcid=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ip->lcid);
error = ENOENT;
goto out;
}
/* Check channel state */
if (ch->state != NG_L2CAP_W4_L2CA_CON_RSP) {
NG_L2CAP_ERR(
"%s: %s - unexpected L2CA_ConnectRsp request message. " \
"Invalid channel state, state=%d, lcid=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->state,
ip->lcid);
error = EINVAL;
goto out;
}
dcid = ch->dcid;
con = ch->con;
/*
* Now we are pretty much sure it is our response. So create and send
* L2CAP_ConnectRsp message to our peer.
*/
if (ch->ident != ip->ident)
NG_L2CAP_WARN(
"%s: %s - channel ident and response ident do not match, scid=%d, ident=%d. " \
"Will use response ident=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->scid,
ch->ident, ip->ident);
/* Check result */
switch (ip->result) {
case NG_L2CAP_SUCCESS:
ch->state = NG_L2CAP_CONFIG;
ch->cfg_state = 0;
break;
case NG_L2CAP_PENDING:
break;
default:
ng_l2cap_free_chan(ch);
ch = NULL;
break;
}
/* Create L2CAP command */
cmd = ng_l2cap_new_cmd(con, ch, ip->ident, NG_L2CAP_CON_RSP,
msg->header.token);
if (cmd == NULL) {
if (ch != NULL)
ng_l2cap_free_chan(ch);
error = ENOMEM;
goto out;
}
_ng_l2cap_con_rsp(cmd->aux, cmd->ident, ip->lcid, dcid,
ip->result, ip->status);
if (cmd->aux == NULL) {
if (ch != NULL)
ng_l2cap_free_chan(ch);
ng_l2cap_free_cmd(cmd);
error = ENOBUFS;
goto out;
}
/* Link command to the queue */
ng_l2cap_link_cmd(con, cmd);
ng_l2cap_lp_deliver(con);
out:
return (error);
} /* ng_l2cap_l2ca_con_rsp_req */
/*
* Send L2CAP_ConnectRsp response to the upper layer
*/
int
ng_l2cap_l2ca_con_rsp_rsp(ng_l2cap_chan_p ch, u_int32_t token, u_int16_t result)
{
ng_l2cap_p l2cap = ch->con->l2cap;
struct ng_mesg *msg = NULL;
ng_l2cap_l2ca_con_rsp_op *op = NULL;
int error = 0;
/* Check if upstream hook is connected and valid */
if (l2cap->l2c == NULL || NG_HOOK_NOT_VALID(l2cap->l2c)) {
NG_L2CAP_ERR(
"%s: %s - unable to send L2CA_ConnectRsp response message. " \
"Hook is not connected or valid, psm=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->psm);
return (ENOTCONN);
}
/* Create and send L2CA_ConnectRsp response message */
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_CON_RSP,
sizeof(*op), M_NOWAIT);
if (msg == NULL)
error = ENOMEM;
else {
msg->header.token = token;
msg->header.flags |= NGF_RESP;
op = (ng_l2cap_l2ca_con_rsp_op *)(msg->data);
op->result = result;
NG_SEND_MSG_HOOK(error, l2cap->node, msg, l2cap->l2c, 0);
}
return (error);
} /* ng_l2cap_l2ca_con_rsp_rsp */
/*
* Send L2CA_ConnectInd message to the upper layer protocol.
*/
int
ng_l2cap_l2ca_con_ind(ng_l2cap_chan_p ch)
{
ng_l2cap_p l2cap = ch->con->l2cap;
struct ng_mesg *msg = NULL;
ng_l2cap_l2ca_con_ind_ip *ip = NULL;
int error = 0;
/* Check if upstream hook is connected and valid */
if (l2cap->l2c == NULL || NG_HOOK_NOT_VALID(l2cap->l2c)) {
NG_L2CAP_ERR(
"%s: %s - unable to send L2CA_ConnectInd message. " \
"Hook is not connected or valid, psm=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->psm);
return (ENOTCONN);
}
/* Create and send L2CA_ConnectInd message */
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_CON_IND,
sizeof(*ip), M_NOWAIT);
if (msg == NULL)
error = ENOMEM;
else {
ip = (ng_l2cap_l2ca_con_ind_ip *)(msg->data);
bcopy(&ch->con->remote, &ip->bdaddr, sizeof(ip->bdaddr));
ip->lcid = ch->scid;
ip->psm = ch->psm;
ip->ident = ch->ident;
NG_SEND_MSG_HOOK(error, l2cap->node, msg, l2cap->l2c, 0);
}
return (error);
} /* ng_l2cap_l2ca_con_ind */
/*
* Process L2CA_Config request from the upper layer protocol
*/
int
ng_l2cap_l2ca_cfg_req(ng_l2cap_p l2cap, struct ng_mesg *msg)
{
ng_l2cap_l2ca_cfg_ip *ip = NULL;
ng_l2cap_chan_p ch = NULL;
ng_l2cap_cmd_p cmd = NULL;
struct mbuf *opt = NULL;
u_int16_t *mtu = NULL, *flush_timo = NULL;
ng_l2cap_flow_p flow = NULL;
int error = 0;
/* Check message */
if (msg->header.arglen != sizeof(*ip)) {
NG_L2CAP_ALERT(
"%s: %s - Invalid L2CA_Config request message size, size=%d\n",
__func__, NG_NODE_NAME(l2cap->node),
msg->header.arglen);
error = EMSGSIZE;
goto out;
}
ip = (ng_l2cap_l2ca_cfg_ip *)(msg->data);
/* Check if we have this channel */
ch = ng_l2cap_chan_by_scid(l2cap, ip->lcid);
if (ch == NULL) {
NG_L2CAP_ERR(
"%s: %s - unexpected L2CA_Config request message. " \
"Channel does not exist, lcid=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ip->lcid);
error = ENOENT;
goto out;
}
/* Check channel state */
if (ch->state != NG_L2CAP_OPEN && ch->state != NG_L2CAP_CONFIG) {
NG_L2CAP_ERR(
"%s: %s - unexpected L2CA_Config request message. " \
"Invalid channel state, state=%d, lcid=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->state,
ch->scid);
error = EINVAL;
goto out;
}
/* Set requested channel configuration options */
ch->imtu = ip->imtu;
bcopy(&ip->oflow, &ch->oflow, sizeof(ch->oflow));
ch->flush_timo = ip->flush_timo;
ch->link_timo = ip->link_timo;
/* Compare channel settings with defaults */
if (ch->imtu != NG_L2CAP_MTU_DEFAULT)
mtu = &ch->imtu;
if (ch->flush_timo != NG_L2CAP_FLUSH_TIMO_DEFAULT)
flush_timo = &ch->flush_timo;
if (bcmp(ng_l2cap_default_flow(), &ch->oflow, sizeof(ch->oflow)) != 0)
flow = &ch->oflow;
/* Create configuration options */
_ng_l2cap_build_cfg_options(opt, mtu, flush_timo, flow);
if (opt == NULL) {
error = ENOBUFS;
goto out;
}
/* Create L2CAP command descriptor */
cmd = ng_l2cap_new_cmd(ch->con, ch, ng_l2cap_get_ident(ch->con),
NG_L2CAP_CFG_REQ, msg->header.token);
if (cmd == NULL) {
NG_FREE_M(opt);
error = ENOMEM;
goto out;
}
if (cmd->ident == NG_L2CAP_NULL_IDENT) {
ng_l2cap_free_cmd(cmd);
NG_FREE_M(opt);
error = EIO;
goto out;
}
/* Create L2CAP command packet */
_ng_l2cap_cfg_req(cmd->aux, cmd->ident, ch->dcid, 0, opt);
if (cmd->aux == NULL) {
ng_l2cap_free_cmd(cmd);
error = ENOBUFS;
goto out;
}
/* Adjust channel state for re-configuration */
if (ch->state == NG_L2CAP_OPEN) {
ch->state = NG_L2CAP_CONFIG;
ch->cfg_state = 0;
}
/* Link command to the queue */
ng_l2cap_link_cmd(ch->con, cmd);
ng_l2cap_lp_deliver(ch->con);
out:
return (error);
} /* ng_l2cap_l2ca_cfg_req */
/*
* Send L2CA_Config response to the upper layer protocol
*/
int
ng_l2cap_l2ca_cfg_rsp(ng_l2cap_chan_p ch, u_int32_t token, u_int16_t result)
{
ng_l2cap_p l2cap = ch->con->l2cap;
struct ng_mesg *msg = NULL;
ng_l2cap_l2ca_cfg_op *op = NULL;
int error = 0;
/* Check if upstream hook is connected and valid */
if (l2cap->l2c == NULL || NG_HOOK_NOT_VALID(l2cap->l2c)) {
NG_L2CAP_ERR(
"%s: %s - unable to send L2CA_Config response message. " \
"Hook is not connected or valid, psm=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->psm);
return (ENOTCONN);
}
/* Create and send L2CA_Config response message */
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_CFG,
sizeof(*op), M_NOWAIT);
if (msg == NULL)
error = ENOMEM;
else {
msg->header.token = token;
msg->header.flags |= NGF_RESP;
op = (ng_l2cap_l2ca_cfg_op *)(msg->data);
op->result = result;
op->imtu = ch->imtu;
bcopy(&ch->oflow, &op->oflow, sizeof(op->oflow));
op->flush_timo = ch->flush_timo;
NG_SEND_MSG_HOOK(error, l2cap->node, msg, l2cap->l2c, 0);
if (error == 0 && result == NG_L2CAP_SUCCESS) {
ch->cfg_state |= NG_L2CAP_CFG_IN;
if (ch->cfg_state == NG_L2CAP_CFG_BOTH)
ch->state = NG_L2CAP_OPEN;
}
}
return (error);
} /* ng_l2cap_l2ca_cfg_rsp */
/*
* Process L2CA_ConfigRsp request from the upper layer protocol
*
* XXX XXX XXX
*
* NOTE: The Bluetooth specification says that Configuration_Response
* (L2CA_ConfigRsp) should be used to issue response to configuration request
* indication. The minor problem here is L2CAP command ident. We should use
* ident from original L2CAP request to make sure our peer can match request
* and response. For some reason Bluetooth specification does not include
* ident field into L2CA_ConfigInd and L2CA_ConfigRsp messages. This seems
* strange to me, because L2CA_ConnectInd and L2CA_ConnectRsp do have ident
* field. So we should store last known L2CAP request command ident in channel.
* Also it seems that upper layer can not reject configuration request, as
* Configuration_Response message does not have status/reason field.
*/
int
ng_l2cap_l2ca_cfg_rsp_req(ng_l2cap_p l2cap, struct ng_mesg *msg)
{
ng_l2cap_l2ca_cfg_rsp_ip *ip = NULL;
ng_l2cap_chan_p ch = NULL;
ng_l2cap_cmd_p cmd = NULL;
struct mbuf *opt = NULL;
u_int16_t *mtu = NULL;
ng_l2cap_flow_p flow = NULL;
int error = 0;
/* Check message */
if (msg->header.arglen != sizeof(*ip)) {
NG_L2CAP_ALERT(
"%s: %s - invalid L2CA_ConfigRsp request message size, size=%d\n",
__func__, NG_NODE_NAME(l2cap->node),
msg->header.arglen);
error = EMSGSIZE;
goto out;
}
ip = (ng_l2cap_l2ca_cfg_rsp_ip *)(msg->data);
/* Check if we have this channel */
ch = ng_l2cap_chan_by_scid(l2cap, ip->lcid);
if (ch == NULL) {
NG_L2CAP_ERR(
"%s: %s - unexpected L2CA_ConfigRsp request message. " \
"Channel does not exist, lcid=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ip->lcid);
error = ENOENT;
goto out;
}
/* Check channel state */
if (ch->state != NG_L2CAP_CONFIG) {
NG_L2CAP_ERR(
"%s: %s - unexpected L2CA_ConfigRsp request message. " \
"Invalid channel state, state=%d, lcid=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->state,
ch->scid);
error = EINVAL;
goto out;
}
/* Set channel settings */
if (ip->omtu != ch->omtu) {
ch->omtu = ip->omtu;
mtu = &ch->omtu;
}
if (bcmp(&ip->iflow, &ch->iflow, sizeof(ch->iflow)) != 0) {
bcopy(&ip->iflow, &ch->iflow, sizeof(ch->iflow));
flow = &ch->iflow;
}
if (mtu != NULL || flow != NULL) {
_ng_l2cap_build_cfg_options(opt, mtu, NULL, flow);
if (opt == NULL) {
error = ENOBUFS;
goto out;
}
}
/* Create L2CAP command */
cmd = ng_l2cap_new_cmd(ch->con, ch, ch->ident, NG_L2CAP_CFG_RSP,
msg->header.token);
if (cmd == NULL) {
NG_FREE_M(opt);
error = ENOMEM;
goto out;
}
_ng_l2cap_cfg_rsp(cmd->aux,cmd->ident,ch->dcid,0,NG_L2CAP_SUCCESS,opt);
if (cmd->aux == NULL) {
ng_l2cap_free_cmd(cmd);
error = ENOBUFS;
goto out;
}
/* XXX FIXME - not here ??? */
ch->cfg_state |= NG_L2CAP_CFG_OUT;
if (ch->cfg_state == NG_L2CAP_CFG_BOTH)
ch->state = NG_L2CAP_OPEN;
/* Link command to the queue */
ng_l2cap_link_cmd(ch->con, cmd);
ng_l2cap_lp_deliver(ch->con);
out:
return (error);
} /* ng_l2cap_l2ca_cfg_rsp_req */
/*
* Send L2CA_ConfigRsp response to the upper layer protocol
*/
int
ng_l2cap_l2ca_cfg_rsp_rsp(ng_l2cap_chan_p ch, u_int32_t token, u_int16_t result)
{
ng_l2cap_p l2cap = ch->con->l2cap;
struct ng_mesg *msg = NULL;
ng_l2cap_l2ca_cfg_rsp_op *op = NULL;
int error = 0;
/* Check if upstream hook is connected and valid */
if (l2cap->l2c == NULL || NG_HOOK_NOT_VALID(l2cap->l2c)) {
NG_L2CAP_ERR(
"%s: %s - unable to send L2CA_ConfigRsp response message. " \
"Hook is not connected or valid, psm=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->psm);
return (ENOTCONN);
}
/* Create and send L2CA_ConfigRsp response message */
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_CFG_RSP,
sizeof(*op), M_NOWAIT);
if (msg == NULL)
error = ENOMEM;
else {
msg->header.token = token;
msg->header.flags |= NGF_RESP;
op = (ng_l2cap_l2ca_cfg_rsp_op *)(msg->data);
op->result = result;
NG_SEND_MSG_HOOK(error, l2cap->node, msg, l2cap->l2c, 0);
}
return (error);
} /* ng_l2cap_l2ca_cfg_rsp_rsp */
/*
* Send L2CA_ConfigInd message to the upper layer protocol
*
* XXX XXX XXX
*
* NOTE: The Bluetooth specification says that Configuration_Response
* (L2CA_ConfigRsp) should be used to issue response to configuration request
* indication. The minor problem here is L2CAP command ident. We should use
* ident from original L2CAP request to make sure our peer can match request
* and response. For some reason Bluetooth specification does not include
* ident field into L2CA_ConfigInd and L2CA_ConfigRsp messages. This seems
* strange to me, because L2CA_ConnectInd and L2CA_ConnectRsp do have ident
* field. So we should store last known L2CAP request command ident in channel.
* Also it seems that upper layer can not reject configuration request, as
* Configuration_Response message does not have status/reason field.
*/
int
ng_l2cap_l2ca_cfg_ind(ng_l2cap_chan_p ch)
{
ng_l2cap_p l2cap = ch->con->l2cap;
struct ng_mesg *msg = NULL;
ng_l2cap_l2ca_cfg_ind_ip *ip = NULL;
int error = 0;
/* Check if upstream hook is connected and valid */
if (l2cap->l2c == NULL || NG_HOOK_NOT_VALID(l2cap->l2c)) {
NG_L2CAP_ERR(
"%s: %s - Unable to send L2CA_ConfigInd message. " \
"Hook is not connected or valid, psm=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->psm);
return (ENOTCONN);
}
/* Create and send L2CA_ConnectInd message */
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_CFG_IND,
sizeof(*ip), M_NOWAIT);
if (msg == NULL)
error = ENOMEM;
else {
ip = (ng_l2cap_l2ca_cfg_ind_ip *)(msg->data);
ip->lcid = ch->scid;
ip->omtu = ch->omtu;
bcopy(&ch->iflow, &ip->iflow, sizeof(ip->iflow));
ip->flush_timo = ch->flush_timo;
NG_SEND_MSG_HOOK(error, l2cap->node, msg, l2cap->l2c, 0);
}
return (error);
} /* ng_l2cap_l2ca_cfg_ind */
/*
* Process L2CA_Write event
*/
int
ng_l2cap_l2ca_write_req(ng_l2cap_p l2cap, struct mbuf *m)
{
ng_l2cap_l2ca_hdr_t *l2ca_hdr = NULL;
ng_l2cap_chan_p ch = NULL;
ng_l2cap_cmd_p cmd = NULL;
int error = 0;
u_int32_t token = 0;
/* Make sure we can access L2CA data packet header */
if (m->m_pkthdr.len < sizeof(*l2ca_hdr)) {
NG_L2CAP_ERR(
"%s: %s - L2CA Data packet too small, len=%d\n",
__func__,NG_NODE_NAME(l2cap->node),m->m_pkthdr.len);
error = EMSGSIZE;
goto drop;
}
/* Get L2CA data packet header */
NG_L2CAP_M_PULLUP(m, sizeof(*l2ca_hdr));
if (m == NULL)
return (ENOBUFS);
l2ca_hdr = mtod(m, ng_l2cap_l2ca_hdr_t *);
token = l2ca_hdr->token;
m_adj(m, sizeof(*l2ca_hdr));
/* Verify payload size */
if (l2ca_hdr->length != m->m_pkthdr.len) {
NG_L2CAP_ERR(
"%s: %s - invalid L2CA Data packet. " \
"Payload length does not match, length=%d, len=%d\n",
__func__, NG_NODE_NAME(l2cap->node), l2ca_hdr->length,
m->m_pkthdr.len);
error = EMSGSIZE;
goto drop;
}
/* Check channel ID */
if (l2ca_hdr->lcid < NG_L2CAP_FIRST_CID) {
NG_L2CAP_ERR(
"%s: %s - invalid L2CA Data packet. Inavlid channel ID, cid=%d\n",
__func__, NG_NODE_NAME(l2cap->node), l2ca_hdr->lcid);
error = EINVAL;
goto drop;
}
/* Verify that we have the channel and make sure it is open */
ch = ng_l2cap_chan_by_scid(l2cap, l2ca_hdr->lcid);
if (ch == NULL) {
NG_L2CAP_ERR(
"%s: %s - invalid L2CA Data packet. Channel does not exist, cid=%d\n",
__func__, NG_NODE_NAME(l2cap->node), l2ca_hdr->lcid);
error = ENOENT;
goto drop;
}
if (ch->state != NG_L2CAP_OPEN) {
NG_L2CAP_ERR(
"%s: %s - invalid L2CA Data packet. Invalid channel state, scid=%d, state=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->scid,
ch->state);
error = EHOSTDOWN;
goto drop; /* XXX not always - re-configure */
}
/* Create L2CAP command descriptor */
cmd = ng_l2cap_new_cmd(ch->con, ch, 0, NGM_L2CAP_L2CA_WRITE, token);
if (cmd == NULL) {
error = ENOMEM;
goto drop;
}
/* Attach data packet and link command to the queue */
cmd->aux = m;
ng_l2cap_link_cmd(ch->con, cmd);
ng_l2cap_lp_deliver(ch->con);
return (error);
drop:
NG_FREE_M(m);
return (error);
} /* ng_l2cap_l2ca_write_req */
/*
* Send L2CA_Write response
*/
int
ng_l2cap_l2ca_write_rsp(ng_l2cap_chan_p ch, u_int32_t token, u_int16_t result,
u_int16_t length)
{
ng_l2cap_p l2cap = ch->con->l2cap;
struct ng_mesg *msg = NULL;
ng_l2cap_l2ca_write_op *op = NULL;
int error = 0;
/* Check if upstream hook is connected and valid */
if (l2cap->l2c == NULL || NG_HOOK_NOT_VALID(l2cap->l2c)) {
NG_L2CAP_ERR(
"%s: %s - unable to send L2CA_WriteRsp message. " \
"Hook is not connected or valid, psm=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->psm);
return (ENOTCONN);
}
/* Create and send L2CA_WriteRsp message */
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_WRITE,
sizeof(*op), M_NOWAIT);
if (msg == NULL)
error = ENOMEM;
else {
msg->header.token = token;
msg->header.flags |= NGF_RESP;
op = (ng_l2cap_l2ca_write_op *)(msg->data);
op->result = result;
op->length = length;
op->lcid = ch->scid;
NG_SEND_MSG_HOOK(error, l2cap->node, msg, l2cap->l2c, 0);
}
return (error);
} /* ng_l2cap_l2ca_write_rsp */
/*
* Receive packet from the lower layer protocol and send it to the upper
* layer protocol (L2CAP_Read)
*/
int
ng_l2cap_l2ca_receive(ng_l2cap_con_p con)
{
ng_l2cap_p l2cap = con->l2cap;
ng_l2cap_hdr_t *hdr = NULL;
ng_l2cap_chan_p ch = NULL;
int error = 0;
NG_L2CAP_M_PULLUP(con->rx_pkt, sizeof(*hdr));
if (con->rx_pkt == NULL)
return (ENOBUFS);
hdr = mtod(con->rx_pkt, ng_l2cap_hdr_t *);
/* Check channel */
ch = ng_l2cap_chan_by_scid(l2cap, hdr->dcid);
if (ch == NULL) {
NG_L2CAP_ERR(
"%s: %s - unexpected L2CAP data packet. Channel does not exist, cid=%d\n",
__func__, NG_NODE_NAME(l2cap->node), hdr->dcid);
error = ENOENT;
goto drop;
}
/* Check channel state */
if (ch->state != NG_L2CAP_OPEN) {
NG_L2CAP_WARN(
"%s: %s - unexpected L2CAP data packet. " \
"Invalid channel state, cid=%d, state=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->scid,
ch->state);
error = EHOSTDOWN; /* XXX not always - re-configuration */
goto drop;
}
/* Check payload size and channel's MTU */
if (hdr->length > ch->imtu) {
NG_L2CAP_ERR(
"%s: %s - invalid L2CAP data packet. " \
"Packet too big, length=%d, imtu=%d, cid=%d\n",
__func__, NG_NODE_NAME(l2cap->node), hdr->length,
ch->imtu, ch->scid);
error = EMSGSIZE;
goto drop;
}
/*
* If we got here then everything looks good and we can sent packet
* to the upper layer protocol.
*/
/* Check if upstream hook is connected and valid */
if (l2cap->l2c == NULL || NG_HOOK_NOT_VALID(l2cap->l2c)) {
NG_L2CAP_ERR(
"%s: %s - unable to send L2CAP data packet. " \
"Hook is not connected or valid, psm=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->psm);
error = ENOTCONN;
goto drop;
}
NG_SEND_DATA_ONLY(error, l2cap->l2c, con->rx_pkt);
con->rx_pkt = NULL;
drop:
NG_FREE_M(con->rx_pkt); /* checks for != NULL */
return (error);
} /* ng_l2cap_receive */
/*
* Receive connectioless (multicast) packet from the lower layer protocol and
* send it to the upper layer protocol
*/
int
ng_l2cap_l2ca_clt_receive(ng_l2cap_con_p con)
{
struct _clt_pkt {
ng_l2cap_hdr_t h;
ng_l2cap_clt_hdr_t c_h;
} __attribute__ ((packed)) *hdr = NULL;
ng_l2cap_p l2cap = con->l2cap;
int length, error = 0;
NG_L2CAP_M_PULLUP(con->rx_pkt, sizeof(*hdr));
if (con->rx_pkt == NULL)
return (ENOBUFS);
hdr = mtod(con->rx_pkt, struct _clt_pkt *);
/* Check packet */
length = con->rx_pkt->m_pkthdr.len - sizeof(*hdr);
if (length < 0) {
NG_L2CAP_ERR(
"%s: %s - invalid L2CAP CLT data packet. Packet too small, length=%d\n",
__func__, NG_NODE_NAME(l2cap->node), length);
error = EMSGSIZE;
goto drop;
}
/* Check payload size against CLT MTU */
if (length > NG_L2CAP_MTU_DEFAULT) {
NG_L2CAP_ERR(
"%s: %s - invalid L2CAP CLT data packet. Packet too big, length=%d, mtu=%d\n",
__func__, NG_NODE_NAME(l2cap->node), length,
NG_L2CAP_MTU_DEFAULT);
error = EMSGSIZE;
goto drop;
}
hdr->c_h.psm = le16toh(hdr->c_h.psm);
/*
* If we got here then everything looks good and we can sent packet
* to the upper layer protocol.
*/
/* Select upstream hook based on PSM */
switch (hdr->c_h.psm) {
case NG_L2CAP_PSM_SDP:
if (l2cap->flags & NG_L2CAP_CLT_SDP_DISABLED)
goto drop;
break;
case NG_L2CAP_PSM_RFCOMM:
if (l2cap->flags & NG_L2CAP_CLT_RFCOMM_DISABLED)
goto drop;
break;
case NG_L2CAP_PSM_TCP:
if (l2cap->flags & NG_L2CAP_CLT_TCP_DISABLED)
goto drop;
break;
}
/* Check if upstream hook is connected and valid */
if (l2cap->l2c == NULL || NG_HOOK_NOT_VALID(l2cap->l2c)) {
NG_L2CAP_ERR(
"%s: %s - unable to send L2CAP CLT data packet. " \
"Hook is not connected or valid, psm=%d\n",
__func__, NG_NODE_NAME(l2cap->node), hdr->c_h.psm);
error = ENOTCONN;
goto drop;
}
NG_SEND_DATA_ONLY(error, l2cap->l2c, con->rx_pkt);
con->rx_pkt = NULL;
drop:
NG_FREE_M(con->rx_pkt); /* checks for != NULL */
return (error);
} /* ng_l2cap_l2ca_clt_receive */
/*
* Send L2CA_QoSViolationInd to the upper layer protocol
*/
int
ng_l2cap_l2ca_qos_ind(ng_l2cap_chan_p ch)
{
ng_l2cap_p l2cap = ch->con->l2cap;
struct ng_mesg *msg = NULL;
ng_l2cap_l2ca_qos_ind_ip *ip = NULL;
int error = 0;
/* Check if upstream hook is connected and valid */
if (l2cap->l2c == NULL || NG_HOOK_NOT_VALID(l2cap->l2c)) {
NG_L2CAP_ERR(
"%s: %s - unable to send L2CA_QoSViolationInd message. " \
"Hook is not connected or valid, psm=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->psm);
return (ENOTCONN);
}
/* Create and send L2CA_QoSViolationInd message */
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_QOS_IND,
sizeof(*ip), M_NOWAIT);
if (msg == NULL)
error = ENOMEM;
else {
ip = (ng_l2cap_l2ca_qos_ind_ip *)(msg->data);
bcopy(&ch->con->remote, &ip->bdaddr, sizeof(ip->bdaddr));
NG_SEND_MSG_HOOK(error, l2cap->node, msg, l2cap->l2c, 0);
}
return (error);
} /* ng_l2cap_l2ca_qos_ind */
/*
* Process L2CA_Disconnect request from the upper layer protocol.
*/
int
ng_l2cap_l2ca_discon_req(ng_l2cap_p l2cap, struct ng_mesg *msg)
{
ng_l2cap_l2ca_discon_ip *ip = NULL;
ng_l2cap_chan_p ch = NULL;
ng_l2cap_cmd_p cmd = NULL;
int error = 0;
/* Check message */
if (msg->header.arglen != sizeof(*ip)) {
NG_L2CAP_ALERT(
"%s: %s - invalid L2CA_Disconnect request message size, size=%d\n",
__func__, NG_NODE_NAME(l2cap->node),
msg->header.arglen);
error = EMSGSIZE;
goto out;
}
ip = (ng_l2cap_l2ca_discon_ip *)(msg->data);
/* Check if we have this channel */
ch = ng_l2cap_chan_by_scid(l2cap, ip->lcid);
if (ch == NULL) {
NG_L2CAP_ERR(
"%s: %s - unexpected L2CA_Disconnect request message. " \
"Channel does not exist, lcid=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ip->lcid);
error = ENOENT;
goto out;
}
/* Check channel state */
if (ch->state != NG_L2CAP_CONFIG && ch->state != NG_L2CAP_OPEN &&
ch->state != NG_L2CAP_W4_L2CAP_DISCON_RSP) {
NG_L2CAP_ERR(
"%s: %s - unexpected L2CA_Disconnect request message. " \
"Invalid channel state, state=%d, lcid=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->state,
ch->scid);
error = EINVAL;
goto out;
}
/* Create and send L2CAP_DisconReq message */
cmd = ng_l2cap_new_cmd(ch->con, ch, ng_l2cap_get_ident(ch->con),
NG_L2CAP_DISCON_REQ, msg->header.token);
if (cmd == NULL) {
ng_l2cap_free_chan(ch);
error = ENOMEM;
goto out;
}
if (cmd->ident == NG_L2CAP_NULL_IDENT) {
ng_l2cap_free_chan(ch);
ng_l2cap_free_cmd(cmd);
error = EIO;
goto out;
}
_ng_l2cap_discon_req(cmd->aux, cmd->ident, ch->dcid, ch->scid);
if (cmd->aux == NULL) {
ng_l2cap_free_chan(ch);
ng_l2cap_free_cmd(cmd);
error = ENOBUFS;
goto out;
}
ch->state = NG_L2CAP_W4_L2CAP_DISCON_RSP;
/* Link command to the queue */
ng_l2cap_link_cmd(ch->con, cmd);
ng_l2cap_lp_deliver(ch->con);
out:
return (error);
} /* ng_l2cap_l2ca_discon_req */
/*
* Send L2CA_Disconnect response to the upper layer protocol
*/
int
ng_l2cap_l2ca_discon_rsp(ng_l2cap_chan_p ch, u_int32_t token, u_int16_t result)
{
ng_l2cap_p l2cap = ch->con->l2cap;
struct ng_mesg *msg = NULL;
ng_l2cap_l2ca_discon_op *op = NULL;
int error = 0;
/* Check if upstream hook is connected and valid */
if (l2cap->l2c == NULL || NG_HOOK_NOT_VALID(l2cap->l2c)) {
NG_L2CAP_ERR(
"%s: %s - unable to send L2CA_Disconnect response message. " \
"Hook is not connected or valid, psm=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->psm);
return (ENOTCONN);
}
/* Create and send L2CA_Disconnect response message */
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_DISCON,
sizeof(*op), M_NOWAIT);
if (msg == NULL)
error = ENOMEM;
else {
msg->header.token = token;
msg->header.flags |= NGF_RESP;
op = (ng_l2cap_l2ca_discon_op *)(msg->data);
op->result = result;
NG_SEND_MSG_HOOK(error, l2cap->node, msg, l2cap->l2c, 0);
}
return (error);
} /* ng_l2cap_l2ca_discon_rsp */
/*
* Send L2CA_DisconnectInd message to the upper layer protocol.
*/
int
ng_l2cap_l2ca_discon_ind(ng_l2cap_chan_p ch)
{
ng_l2cap_p l2cap = ch->con->l2cap;
struct ng_mesg *msg = NULL;
ng_l2cap_l2ca_discon_ind_ip *ip = NULL;
int error = 0;
/* Check if upstream hook is connected and valid */
if (l2cap->l2c == NULL || NG_HOOK_NOT_VALID(l2cap->l2c)) {
NG_L2CAP_ERR(
"%s: %s - unable to send L2CA_DisconnectInd message. " \
"Hook is not connected or valid, psm=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ch->psm);
return (ENOTCONN);
}
/* Create and send L2CA_DisconnectInd message */
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_DISCON_IND,
sizeof(*ip), M_NOWAIT);
if (msg == NULL)
error = ENOMEM;
else {
ip = (ng_l2cap_l2ca_discon_ind_ip *)(msg->data);
ip->lcid = ch->scid;
NG_SEND_MSG_HOOK(error, l2cap->node, msg, l2cap->l2c, 0);
}
return (error);
} /* ng_l2cap_l2ca_discon_ind */
/*
* Process L2CA_GroupCreate request from the upper layer protocol.
* XXX FIXME
*/
int
ng_l2cap_l2ca_grp_create(ng_l2cap_p l2cap, struct ng_mesg *msg)
{
return (ENOTSUP);
} /* ng_l2cap_l2ca_grp_create */
/*
* Process L2CA_GroupClose request from the upper layer protocol
* XXX FIXME
*/
int
ng_l2cap_l2ca_grp_close(ng_l2cap_p l2cap, struct ng_mesg *msg)
{
return (ENOTSUP);
} /* ng_l2cap_l2ca_grp_close */
/*
* Process L2CA_GroupAddMember request from the upper layer protocol.
* XXX FIXME
*/
int
ng_l2cap_l2ca_grp_add_member_req(ng_l2cap_p l2cap, struct ng_mesg *msg)
{
return (ENOTSUP);
} /* ng_l2cap_l2ca_grp_add_member_req */
/*
* Send L2CA_GroupAddMember response to the upper layer protocol.
* XXX FIXME
*/
int
ng_l2cap_l2ca_grp_add_member_rsp(ng_l2cap_chan_p ch, u_int32_t token,
u_int16_t result)
{
return (0);
} /* ng_l2cap_l2ca_grp_add_member_rsp */
/*
* Process L2CA_GroupDeleteMember request from the upper layer protocol
* XXX FIXME
*/
int
ng_l2cap_l2ca_grp_rem_member(ng_l2cap_p l2cap, struct ng_mesg *msg)
{
return (ENOTSUP);
} /* ng_l2cap_l2ca_grp_rem_member */
/*
* Process L2CA_GroupGetMembers request from the upper layer protocol
* XXX FIXME
*/
int
ng_l2cap_l2ca_grp_get_members(ng_l2cap_p l2cap, struct ng_mesg *msg)
{
return (ENOTSUP);
} /* ng_l2cap_l2ca_grp_get_members */
/*
* Process L2CA_Ping request from the upper layer protocol
*/
int
ng_l2cap_l2ca_ping_req(ng_l2cap_p l2cap, struct ng_mesg *msg)
{
ng_l2cap_l2ca_ping_ip *ip = NULL;
ng_l2cap_con_p con = NULL;
ng_l2cap_cmd_p cmd = NULL;
int error = 0;
/* Verify message */
if (msg->header.arglen < sizeof(*ip)) {
NG_L2CAP_ALERT(
"%s: %s - invalid L2CA_Ping request message size, size=%d\n",
__func__, NG_NODE_NAME(l2cap->node),
msg->header.arglen);
error = EMSGSIZE;
goto out;
}
ip = (ng_l2cap_l2ca_ping_ip *)(msg->data);
if (ip->echo_size > NG_L2CAP_MAX_ECHO_SIZE) {
NG_L2CAP_WARN(
"%s: %s - invalid L2CA_Ping request. Echo size is too big, echo_size=%d\n",
__func__, NG_NODE_NAME(l2cap->node), ip->echo_size);
error = EMSGSIZE;
goto out;
}
/* Check if we have connection to the unit */
con = ng_l2cap_con_by_addr(l2cap, &ip->bdaddr);
if (con == NULL) {
/* Submit LP_ConnectReq to the lower layer */
error = ng_l2cap_lp_con_req(l2cap, &ip->bdaddr);
if (error != 0) {
NG_L2CAP_ERR(
"%s: %s - unable to send LP_ConnectReq message, error=%d\n",
__func__, NG_NODE_NAME(l2cap->node), error);
goto out;
}
/* This should not fail */
con = ng_l2cap_con_by_addr(l2cap, &ip->bdaddr);
KASSERT((con != NULL),
("%s: %s - could not find connection!\n", __func__, NG_NODE_NAME(l2cap->node)));
}
/* Create L2CAP command descriptor */
cmd = ng_l2cap_new_cmd(con, NULL, ng_l2cap_get_ident(con),
NG_L2CAP_ECHO_REQ, msg->header.token);
if (cmd == NULL) {
error = ENOMEM;
goto out;
}
if (cmd->ident == NG_L2CAP_NULL_IDENT) {
ng_l2cap_free_cmd(cmd);
error = EIO;
goto out;
}
/* Create L2CAP command packet */
_ng_l2cap_echo_req(cmd->aux, cmd->ident,
msg->data + sizeof(*ip), ip->echo_size);
if (cmd->aux == NULL) {
ng_l2cap_free_cmd(cmd);
error = ENOBUFS;
goto out;
}
/* Link command to the queue */
ng_l2cap_link_cmd(con, cmd);
ng_l2cap_lp_deliver(con);
out:
return (error);
} /* ng_l2cap_l2ca_ping_req */
/*
* Send L2CA_Ping response to the upper layer protocol
*/
int
ng_l2cap_l2ca_ping_rsp(ng_l2cap_con_p con, u_int32_t token, u_int16_t result,
struct mbuf *data)
{
ng_l2cap_p l2cap = con->l2cap;
struct ng_mesg *msg = NULL;
ng_l2cap_l2ca_ping_op *op = NULL;
int error = 0, size = 0;
/* Check if control hook is connected and valid */
if (l2cap->ctl == NULL || NG_HOOK_NOT_VALID(l2cap->ctl)) {
NG_L2CAP_WARN(
"%s: %s - unable to send L2CA_Ping response message. " \
"Hook is not connected or valid\n",
__func__, NG_NODE_NAME(l2cap->node));
error = ENOTCONN;
goto out;
}
size = (data == NULL)? 0 : data->m_pkthdr.len;
/* Create and send L2CA_Ping response message */
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_PING,
sizeof(*op) + size, M_NOWAIT);
if (msg == NULL)
error = ENOMEM;
else {
msg->header.token = token;
msg->header.flags |= NGF_RESP;
op = (ng_l2cap_l2ca_ping_op *)(msg->data);
op->result = result;
bcopy(&con->remote, &op->bdaddr, sizeof(op->bdaddr));
if (data != NULL && size > 0) {
op->echo_size = size;
m_copydata(data, 0, size, (caddr_t) op + sizeof(*op));
}
NG_SEND_MSG_HOOK(error, l2cap->node, msg, l2cap->ctl, 0);
}
out:
NG_FREE_M(data);
return (error);
} /* ng_l2cap_l2ca_ping_rsp */
/*
* Process L2CA_GetInfo request from the upper layer protocol
*/
int
ng_l2cap_l2ca_get_info_req(ng_l2cap_p l2cap, struct ng_mesg *msg)
{
ng_l2cap_l2ca_get_info_ip *ip = NULL;
ng_l2cap_con_p con = NULL;
ng_l2cap_cmd_p cmd = NULL;
int error = 0;
/* Verify message */
if (msg->header.arglen != sizeof(*ip)) {
NG_L2CAP_ALERT(
"%s: %s - invalid L2CA_GetInfo request message size, size=%d\n",
__func__, NG_NODE_NAME(l2cap->node),
msg->header.arglen);
error = EMSGSIZE;
goto out;
}
ip = (ng_l2cap_l2ca_get_info_ip *)(msg->data);
/* Check if we have connection to the unit */
con = ng_l2cap_con_by_addr(l2cap, &ip->bdaddr);
if (con == NULL) {
/* Submit LP_ConnectReq to the lower layer */
error = ng_l2cap_lp_con_req(l2cap, &ip->bdaddr);
if (error != 0) {
NG_L2CAP_ERR(
"%s: %s - unable to send LP_ConnectReq message, error=%d\n",
__func__, NG_NODE_NAME(l2cap->node), error);
goto out;
}
/* This should not fail */
con = ng_l2cap_con_by_addr(l2cap, &ip->bdaddr);
KASSERT((con != NULL),
("%s: %s - could not find connection!\n", __func__, NG_NODE_NAME(l2cap->node)));
}
/* Create L2CAP command descriptor */
cmd = ng_l2cap_new_cmd(con, NULL, ng_l2cap_get_ident(con),
NG_L2CAP_INFO_REQ, msg->header.token);
if (cmd == NULL) {
error = ENOMEM;
goto out;
}
if (cmd->ident == NG_L2CAP_NULL_IDENT) {
ng_l2cap_free_cmd(cmd);
error = EIO;
goto out;
}
/* Create L2CAP command packet */
_ng_l2cap_info_req(cmd->aux, cmd->ident, ip->info_type);
if (cmd->aux == NULL) {
ng_l2cap_free_cmd(cmd);
error = ENOBUFS;
goto out;
}
/* Link command to the queue */
ng_l2cap_link_cmd(con, cmd);
ng_l2cap_lp_deliver(con);
out:
return (error);
} /* ng_l2cap_l2ca_get_info_req */
/*
* Send L2CA_GetInfo response to the upper layer protocol
*/
int
ng_l2cap_l2ca_get_info_rsp(ng_l2cap_con_p con, u_int32_t token,
u_int16_t result, struct mbuf *data)
{
ng_l2cap_p l2cap = con->l2cap;
struct ng_mesg *msg = NULL;
ng_l2cap_l2ca_get_info_op *op = NULL;
int error = 0, size;
/* Check if control hook is connected and valid */
if (l2cap->ctl == NULL || NG_HOOK_NOT_VALID(l2cap->ctl)) {
NG_L2CAP_WARN(
"%s: %s - unable to send L2CA_GetInfo response message. " \
"Hook is not connected or valid\n",
__func__, NG_NODE_NAME(l2cap->node));
error = ENOTCONN;
goto out;
}
size = (data == NULL)? 0 : data->m_pkthdr.len;
/* Create and send L2CA_GetInfo response message */
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_GET_INFO,
sizeof(*op) + size, M_NOWAIT);
if (msg == NULL)
error = ENOMEM;
else {
msg->header.token = token;
msg->header.flags |= NGF_RESP;
op = (ng_l2cap_l2ca_get_info_op *)(msg->data);
op->result = result;
if (data != NULL && size > 0) {
op->info_size = size;
m_copydata(data, 0, size, (caddr_t) op + sizeof(*op));
}
NG_SEND_MSG_HOOK(error, l2cap->node, msg, l2cap->ctl, 0);
}
out:
NG_FREE_M(data);
return (error);
} /* ng_l2cap_l2ca_get_info_rsp */
/*
* Process L2CA_EnableCLT message from the upper layer protocol
* XXX convert to NGN_L2CAP_NODE_SET_FLAGS?
*/
int
ng_l2cap_l2ca_enable_clt(ng_l2cap_p l2cap, struct ng_mesg *msg)
{
ng_l2cap_l2ca_enable_clt_ip *ip = NULL;
int error = 0;
#if 0
* ng_l2cap_l2ca_enable_clt_op *op = NULL;
* u_int16_t result;
* u_int32_t token;
#endif
/* Check message */
if (msg->header.arglen != sizeof(*ip)) {
NG_L2CAP_ALERT(
"%s: %s - invalid L2CA_EnableCLT message size, size=%d\n",
__func__, NG_NODE_NAME(l2cap->node),
msg->header.arglen);
return (EMSGSIZE);
}
/* Process request */
ip = (ng_l2cap_l2ca_enable_clt_ip *) (msg->data);
#if 0
* result = NG_L2CAP_SUCCESS;
#endif
switch (ip->psm)
{
case 0:
/* Special case: disable/enable all PSM */
if (ip->enable)
l2cap->flags &= ~(NG_L2CAP_CLT_SDP_DISABLED |
NG_L2CAP_CLT_RFCOMM_DISABLED |
NG_L2CAP_CLT_TCP_DISABLED);
else
l2cap->flags |= (NG_L2CAP_CLT_SDP_DISABLED |
NG_L2CAP_CLT_RFCOMM_DISABLED |
NG_L2CAP_CLT_TCP_DISABLED);
break;
case NG_L2CAP_PSM_SDP:
if (ip->enable)
l2cap->flags &= ~NG_L2CAP_CLT_SDP_DISABLED;
else
l2cap->flags |= NG_L2CAP_CLT_SDP_DISABLED;
break;
case NG_L2CAP_PSM_RFCOMM:
if (ip->enable)
l2cap->flags &= ~NG_L2CAP_CLT_RFCOMM_DISABLED;
else
l2cap->flags |= NG_L2CAP_CLT_RFCOMM_DISABLED;
break;
case NG_L2CAP_PSM_TCP:
if (ip->enable)
l2cap->flags &= ~NG_L2CAP_CLT_TCP_DISABLED;
else
l2cap->flags |= NG_L2CAP_CLT_TCP_DISABLED;
break;
default:
NG_L2CAP_ERR(
"%s: %s - unsupported PSM=%d\n", __func__, NG_NODE_NAME(l2cap->node), ip->psm);
#if 0
* result = NG_L2CAP_PSM_NOT_SUPPORTED;
#endif
error = ENOTSUP;
break;
}
#if 0
* /* Create and send response message */
* token = msg->header.token;
* NG_FREE_MSG(msg);
* NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_ENABLE_CLT,
* sizeof(*op), M_NOWAIT);
* if (msg == NULL)
* error = ENOMEM;
* else {
* msg->header.token = token;
* msg->header.flags |= NGF_RESP;
*
* op = (ng_l2cap_l2ca_enable_clt_op *)(msg->data);
* op->result = result;
* }
*
* /* Send response to control hook */
* if (l2cap->ctl != NULL && NG_HOOK_IS_VALID(l2cap->ctl))
* NG_SEND_MSG_HOOK(error, l2cap->node, msg, l2cap->ctl, 0);
#endif
return (error);
} /* ng_l2cap_l2ca_enable_clt */
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