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f-stack/freebsd/netgraph/atm/ng_atm.c

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/*-
* Copyright (c) 2001-2003
* Fraunhofer Institute for Open Communication Systems (FhG Fokus).
* 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.
*
* Author: Hartmut Brandt <harti@freebsd.org>
*/
/*
* Netgraph module to connect NATM interfaces to netgraph.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/errno.h>
#include <sys/syslog.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sbuf.h>
#include <sys/ioccom.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_arp.h>
#include <net/if_var.h>
#include <net/if_media.h>
#include <net/if_atm.h>
#include <net/vnet.h>
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include <netgraph/ng_parse.h>
#include <netgraph/atm/ng_atm.h>
/*
* Hooks in the NATM code
*/
extern void (*ng_atm_attach_p)(struct ifnet *);
extern void (*ng_atm_detach_p)(struct ifnet *);
extern int (*ng_atm_output_p)(struct ifnet *, struct mbuf **);
extern void (*ng_atm_input_p)(struct ifnet *, struct mbuf **,
struct atm_pseudohdr *, void *);
extern void (*ng_atm_input_orphan_p)(struct ifnet *, struct mbuf *,
struct atm_pseudohdr *, void *);
extern void (*ng_atm_event_p)(struct ifnet *, uint32_t, void *);
/*
* Sysctl stuff.
*/
static SYSCTL_NODE(_net_graph, OID_AUTO, atm, CTLFLAG_RW, 0,
"atm related stuff");
#ifdef NGATM_DEBUG
static int allow_shutdown;
SYSCTL_INT(_net_graph_atm, OID_AUTO, allow_shutdown, CTLFLAG_RW,
&allow_shutdown, 0, "allow ng_atm nodes to shutdown");
#endif
/*
* Hook private data
*/
struct ngvcc {
uint16_t vpi; /* VPI of this hook */
uint16_t vci; /* VCI of this hook, 0 if none */
uint32_t flags; /* private flags */
hook_p hook; /* the connected hook */
LIST_ENTRY(ngvcc) link;
};
#define VCC_OPEN 0x0001 /* open */
/*
* Node private data
*/
struct priv {
struct ifnet *ifp; /* the ATM interface */
hook_p input; /* raw input hook */
hook_p orphans; /* packets to nowhere */
hook_p output; /* catch output packets */
hook_p manage; /* has also entry in vccs */
uint64_t in_packets;
uint64_t in_errors;
uint64_t out_packets;
uint64_t out_errors;
LIST_HEAD(, ngvcc) vccs;
};
/*
* Parse ifstate state
*/
static const struct ng_parse_struct_field ng_atm_if_change_info[] =
NGM_ATM_IF_CHANGE_INFO;
static const struct ng_parse_type ng_atm_if_change_type = {
&ng_parse_struct_type,
&ng_atm_if_change_info
};
/*
* Parse vcc state change
*/
static const struct ng_parse_struct_field ng_atm_vcc_change_info[] =
NGM_ATM_VCC_CHANGE_INFO;
static const struct ng_parse_type ng_atm_vcc_change_type = {
&ng_parse_struct_type,
&ng_atm_vcc_change_info
};
/*
* Parse acr change
*/
static const struct ng_parse_struct_field ng_atm_acr_change_info[] =
NGM_ATM_ACR_CHANGE_INFO;
static const struct ng_parse_type ng_atm_acr_change_type = {
&ng_parse_struct_type,
&ng_atm_acr_change_info
};
/*
* Parse the configuration structure ng_atm_config
*/
static const struct ng_parse_struct_field ng_atm_config_type_info[] =
NGM_ATM_CONFIG_INFO;
static const struct ng_parse_type ng_atm_config_type = {
&ng_parse_struct_type,
&ng_atm_config_type_info
};
/*
* Parse a single vcc structure and a variable array of these ng_atm_vccs
*/
static const struct ng_parse_struct_field ng_atm_tparam_type_info[] =
NGM_ATM_TPARAM_INFO;
static const struct ng_parse_type ng_atm_tparam_type = {
&ng_parse_struct_type,
&ng_atm_tparam_type_info
};
static const struct ng_parse_struct_field ng_atm_vcc_type_info[] =
NGM_ATM_VCC_INFO;
static const struct ng_parse_type ng_atm_vcc_type = {
&ng_parse_struct_type,
&ng_atm_vcc_type_info
};
static int
ng_atm_vccarray_getlen(const struct ng_parse_type *type,
const u_char *start, const u_char *buf)
{
const struct atmio_vcctable *vp;
vp = (const struct atmio_vcctable *)
(buf - offsetof(struct atmio_vcctable, vccs));
return (vp->count);
}
static const struct ng_parse_array_info ng_atm_vccarray_info =
NGM_ATM_VCCARRAY_INFO;
static const struct ng_parse_type ng_atm_vccarray_type = {
&ng_parse_array_type,
&ng_atm_vccarray_info
};
static const struct ng_parse_struct_field ng_atm_vcctable_type_info[] =
NGM_ATM_VCCTABLE_INFO;
static const struct ng_parse_type ng_atm_vcctable_type = {
&ng_parse_struct_type,
&ng_atm_vcctable_type_info
};
/*
* Parse CPCS INIT structure ng_atm_cpcs_init
*/
static const struct ng_parse_struct_field ng_atm_cpcs_init_type_info[] =
NGM_ATM_CPCS_INIT_INFO;
static const struct ng_parse_type ng_atm_cpcs_init_type = {
&ng_parse_struct_type,
&ng_atm_cpcs_init_type_info
};
/*
* Parse CPCS TERM structure ng_atm_cpcs_term
*/
static const struct ng_parse_struct_field ng_atm_cpcs_term_type_info[] =
NGM_ATM_CPCS_TERM_INFO;
static const struct ng_parse_type ng_atm_cpcs_term_type = {
&ng_parse_struct_type,
&ng_atm_cpcs_term_type_info
};
/*
* Parse statistic struct
*/
static const struct ng_parse_struct_field ng_atm_stats_type_info[] =
NGM_ATM_STATS_INFO;
static const struct ng_parse_type ng_atm_stats_type = {
&ng_parse_struct_type,
&ng_atm_stats_type_info
};
static const struct ng_cmdlist ng_atm_cmdlist[] = {
{
NGM_ATM_COOKIE,
NGM_ATM_GET_IFNAME,
"getifname",
NULL,
&ng_parse_string_type
},
{
NGM_ATM_COOKIE,
NGM_ATM_GET_CONFIG,
"getconfig",
NULL,
&ng_atm_config_type
},
{
NGM_ATM_COOKIE,
NGM_ATM_GET_VCCS,
"getvccs",
NULL,
&ng_atm_vcctable_type
},
{
NGM_ATM_COOKIE,
NGM_ATM_CPCS_INIT,
"cpcsinit",
&ng_atm_cpcs_init_type,
NULL
},
{
NGM_ATM_COOKIE,
NGM_ATM_CPCS_TERM,
"cpcsterm",
&ng_atm_cpcs_term_type,
NULL
},
{
NGM_ATM_COOKIE,
NGM_ATM_GET_VCC,
"getvcc",
&ng_parse_hookbuf_type,
&ng_atm_vcc_type
},
{
NGM_ATM_COOKIE,
NGM_ATM_GET_VCCID,
"getvccid",
&ng_atm_vcc_type,
&ng_atm_vcc_type
},
{
NGM_ATM_COOKIE,
NGM_ATM_GET_STATS,
"getstats",
NULL,
&ng_atm_stats_type
},
/* events */
{
NGM_ATM_COOKIE,
NGM_ATM_IF_CHANGE,
"if_change",
&ng_atm_if_change_type,
&ng_atm_if_change_type,
},
{
NGM_ATM_COOKIE,
NGM_ATM_VCC_CHANGE,
"vcc_change",
&ng_atm_vcc_change_type,
&ng_atm_vcc_change_type,
},
{
NGM_ATM_COOKIE,
NGM_ATM_ACR_CHANGE,
"acr_change",
&ng_atm_acr_change_type,
&ng_atm_acr_change_type,
},
{ 0 }
};
static int ng_atm_mod_event(module_t, int, void *);
static ng_constructor_t ng_atm_constructor;
static ng_shutdown_t ng_atm_shutdown;
static ng_rcvmsg_t ng_atm_rcvmsg;
static ng_newhook_t ng_atm_newhook;
static ng_connect_t ng_atm_connect;
static ng_disconnect_t ng_atm_disconnect;
static ng_rcvdata_t ng_atm_rcvdata;
static ng_rcvdata_t ng_atm_rcvdrop;
static struct ng_type ng_atm_typestruct = {
.version = NG_ABI_VERSION,
.name = NG_ATM_NODE_TYPE,
.mod_event = ng_atm_mod_event,
.constructor = ng_atm_constructor,
.rcvmsg = ng_atm_rcvmsg,
.shutdown = ng_atm_shutdown,
.newhook = ng_atm_newhook,
.connect = ng_atm_connect,
.rcvdata = ng_atm_rcvdata,
.disconnect = ng_atm_disconnect,
.cmdlist = ng_atm_cmdlist,
};
NETGRAPH_INIT(atm, &ng_atm_typestruct);
static const struct {
u_int media;
const char *name;
} atmmedia[] = IFM_SUBTYPE_ATM_DESCRIPTIONS;
#define IFP2NG(IFP) ((node_p)((struct ifatm *)(IFP)->if_softc)->ngpriv)
#define IFP2NG_SET(IFP, val) (((struct ifatm *)(IFP)->if_softc)->ngpriv = (val))
#define IFFLAGS "\020\001UP\002BROADCAST\003DEBUG\004LOOPBACK" \
"\005POINTOPOINT\006SMART\007RUNNING\010NOARP" \
"\011PROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX" \
"\015LINK0\016LINK1\017LINK2\020MULTICAST"
/************************************************************/
/*
* INPUT
*/
/*
* A packet is received from an interface.
* If we have an input hook, prepend the pseudoheader to the data and
* deliver it out to that hook. If not, look whether it is destined for
* use. If so locate the appropriate hook, deliver the packet without the
* header and we are done. If it is not for us, leave it alone.
*/
static void
ng_atm_input(struct ifnet *ifp, struct mbuf **mp,
struct atm_pseudohdr *ah, void *rxhand)
{
node_p node = IFP2NG(ifp);
struct priv *priv;
const struct ngvcc *vcc;
int error;
if (node == NULL)
return;
priv = NG_NODE_PRIVATE(node);
if (priv->input != NULL) {
/*
* Prepend the atm_pseudoheader.
*/
M_PREPEND(*mp, sizeof(*ah), M_NOWAIT);
if (*mp == NULL)
return;
memcpy(mtod(*mp, struct atm_pseudohdr *), ah, sizeof(*ah));
NG_SEND_DATA_ONLY(error, priv->input, *mp);
if (error == 0) {
priv->in_packets++;
*mp = NULL;
} else {
#ifdef NGATM_DEBUG
printf("%s: error=%d\n", __func__, error);
#endif
priv->in_errors++;
}
return;
}
if ((ATM_PH_FLAGS(ah) & ATMIO_FLAG_NG) == 0)
return;
vcc = (struct ngvcc *)rxhand;
NG_SEND_DATA_ONLY(error, vcc->hook, *mp);
if (error == 0) {
priv->in_packets++;
*mp = NULL;
} else {
#ifdef NGATM_DEBUG
printf("%s: error=%d\n", __func__, error);
#endif
priv->in_errors++;
}
}
/*
* ATM packet is about to be output. The atm_pseudohdr is already prepended.
* If the hook is set, reroute the packet to the hook.
*/
static int
ng_atm_output(struct ifnet *ifp, struct mbuf **mp)
{
const node_p node = IFP2NG(ifp);
const struct priv *priv;
int error = 0;
if (node == NULL)
return (0);
priv = NG_NODE_PRIVATE(node);
if (priv->output) {
NG_SEND_DATA_ONLY(error, priv->output, *mp);
*mp = NULL;
}
return (error);
}
/*
* Well, this doesn't make much sense for ATM.
*/
static void
ng_atm_input_orphans(struct ifnet *ifp, struct mbuf *m,
struct atm_pseudohdr *ah, void *rxhand)
{
node_p node = IFP2NG(ifp);
struct priv *priv;
int error;
if (node == NULL) {
m_freem(m);
return;
}
priv = NG_NODE_PRIVATE(node);
if (priv->orphans == NULL) {
m_freem(m);
return;
}
/*
* Prepend the atm_pseudoheader.
*/
M_PREPEND(m, sizeof(*ah), M_NOWAIT);
if (m == NULL)
return;
memcpy(mtod(m, struct atm_pseudohdr *), ah, sizeof(*ah));
NG_SEND_DATA_ONLY(error, priv->orphans, m);
if (error == 0)
priv->in_packets++;
else {
priv->in_errors++;
#ifdef NGATM_DEBUG
printf("%s: error=%d\n", __func__, error);
#endif
}
}
/************************************************************/
/*
* OUTPUT
*/
static int
ng_atm_rcvdata(hook_p hook, item_p item)
{
node_p node = NG_HOOK_NODE(hook);
struct priv *priv = NG_NODE_PRIVATE(node);
const struct ngvcc *vcc = NG_HOOK_PRIVATE(hook);
struct mbuf *m;
struct atm_pseudohdr *aph;
int error;
if (vcc->vci == 0) {
NG_FREE_ITEM(item);
return (ENOTCONN);
}
NGI_GET_M(item, m);
NG_FREE_ITEM(item);
/*
* Prepend pseudo-hdr. Drivers don't care about the flags.
*/
M_PREPEND(m, sizeof(*aph), M_NOWAIT);
if (m == NULL) {
NG_FREE_M(m);
return (ENOMEM);
}
aph = mtod(m, struct atm_pseudohdr *);
ATM_PH_VPI(aph) = vcc->vpi;
ATM_PH_SETVCI(aph, vcc->vci);
ATM_PH_FLAGS(aph) = 0;
if ((error = atm_output(priv->ifp, m, NULL, NULL)) == 0)
priv->out_packets++;
else
priv->out_errors++;
return (error);
}
static int
ng_atm_rcvdrop(hook_p hook, item_p item)
{
NG_FREE_ITEM(item);
return (0);
}
/************************************************************
*
* Event from driver.
*/
static void
ng_atm_event_func(node_p node, hook_p hook, void *arg, int event)
{
const struct priv *priv = NG_NODE_PRIVATE(node);
struct ngvcc *vcc;
struct ng_mesg *mesg;
int error;
switch (event) {
case ATMEV_FLOW_CONTROL:
{
struct atmev_flow_control *ev = arg;
struct ngm_queue_state *qstate;
/* find the connection */
LIST_FOREACH(vcc, &priv->vccs, link)
if (vcc->vci == ev->vci && vcc->vpi == ev->vpi)
break;
if (vcc == NULL)
break;
/* convert into a flow control message */
NG_MKMESSAGE(mesg, NGM_FLOW_COOKIE,
ev->busy ? NGM_HIGH_WATER_PASSED : NGM_LOW_WATER_PASSED,
sizeof(struct ngm_queue_state), M_NOWAIT);
if (mesg == NULL)
break;
qstate = (struct ngm_queue_state *)mesg->data;
/* XXX have to figure out how to get that info */
NG_SEND_MSG_HOOK(error, node, mesg, vcc->hook, 0);
break;
}
case ATMEV_VCC_CHANGED:
{
struct atmev_vcc_changed *ev = arg;
struct ngm_atm_vcc_change *chg;
if (priv->manage == NULL)
break;
NG_MKMESSAGE(mesg, NGM_ATM_COOKIE, NGM_ATM_VCC_CHANGE,
sizeof(struct ngm_atm_vcc_change), M_NOWAIT);
if (mesg == NULL)
break;
chg = (struct ngm_atm_vcc_change *)mesg->data;
chg->vci = ev->vci;
chg->vpi = ev->vpi;
chg->state = (ev->up != 0);
chg->node = NG_NODE_ID(node);
NG_SEND_MSG_HOOK(error, node, mesg, priv->manage, 0);
break;
}
case ATMEV_IFSTATE_CHANGED:
{
struct atmev_ifstate_changed *ev = arg;
struct ngm_atm_if_change *chg;
if (priv->manage == NULL)
break;
NG_MKMESSAGE(mesg, NGM_ATM_COOKIE, NGM_ATM_IF_CHANGE,
sizeof(struct ngm_atm_if_change), M_NOWAIT);
if (mesg == NULL)
break;
chg = (struct ngm_atm_if_change *)mesg->data;
chg->carrier = (ev->carrier != 0);
chg->running = (ev->running != 0);
chg->node = NG_NODE_ID(node);
NG_SEND_MSG_HOOK(error, node, mesg, priv->manage, 0);
break;
}
case ATMEV_ACR_CHANGED:
{
struct atmev_acr_changed *ev = arg;
struct ngm_atm_acr_change *acr;
/* find the connection */
LIST_FOREACH(vcc, &priv->vccs, link)
if (vcc->vci == ev->vci && vcc->vpi == ev->vpi)
break;
if (vcc == NULL)
break;
/* convert into a flow control message */
NG_MKMESSAGE(mesg, NGM_ATM_COOKIE, NGM_ATM_ACR_CHANGE,
sizeof(struct ngm_atm_acr_change), M_NOWAIT);
if (mesg == NULL)
break;
acr = (struct ngm_atm_acr_change *)mesg->data;
acr->node = NG_NODE_ID(node);
acr->vci = ev->vci;
acr->vpi = ev->vpi;
acr->acr = ev->acr;
NG_SEND_MSG_HOOK(error, node, mesg, vcc->hook, 0);
break;
}
}
}
/*
* Use send_fn to get the right lock
*/
static void
ng_atm_event(struct ifnet *ifp, uint32_t event, void *arg)
{
const node_p node = IFP2NG(ifp);
if (node != NULL)
/* may happen during attach/detach */
(void)ng_send_fn(node, NULL, ng_atm_event_func, arg, event);
}
/************************************************************
*
* CPCS
*/
/*
* Open a channel for the user
*/
static int
ng_atm_cpcs_init(node_p node, const struct ngm_atm_cpcs_init *arg)
{
struct priv *priv = NG_NODE_PRIVATE(node);
const struct ifatm_mib *mib;
struct ngvcc *vcc;
struct atmio_openvcc data;
int err;
if(priv->ifp->if_ioctl == NULL)
return (ENXIO);
mib = (const struct ifatm_mib *)(priv->ifp->if_linkmib);
LIST_FOREACH(vcc, &priv->vccs, link)
if (strcmp(arg->name, NG_HOOK_NAME(vcc->hook)) == 0)
break;
if (vcc == NULL)
return (ENOTCONN);
if (vcc->flags & VCC_OPEN)
return (EISCONN);
/*
* Check user arguments and construct ioctl argument
*/
memset(&data, 0, sizeof(data));
data.rxhand = vcc;
switch (data.param.aal = arg->aal) {
case ATMIO_AAL_34:
case ATMIO_AAL_5:
case ATMIO_AAL_0:
case ATMIO_AAL_RAW:
break;
default:
return (EINVAL);
}
if (arg->vpi > 0xff)
return (EINVAL);
data.param.vpi = arg->vpi;
/* allow 0.0 as catch all receive channel */
if (arg->vci == 0 && (arg->vpi != 0 || !(arg->flags & ATMIO_FLAG_NOTX)))
return (EINVAL);
data.param.vci = arg->vci;
data.param.tparam.pcr = arg->pcr;
if (arg->mcr > arg->pcr)
return (EINVAL);
data.param.tparam.mcr = arg->mcr;
if (!(arg->flags & ATMIO_FLAG_NOTX)) {
if (arg->tmtu == 0)
data.param.tmtu = priv->ifp->if_mtu;
else {
data.param.tmtu = arg->tmtu;
}
}
if (!(arg->flags & ATMIO_FLAG_NORX)) {
if (arg->rmtu == 0)
data.param.rmtu = priv->ifp->if_mtu;
else {
data.param.rmtu = arg->rmtu;
}
}
switch (data.param.traffic = arg->traffic) {
case ATMIO_TRAFFIC_UBR:
case ATMIO_TRAFFIC_CBR:
break;
case ATMIO_TRAFFIC_VBR:
if (arg->scr > arg->pcr)
return (EINVAL);
data.param.tparam.scr = arg->scr;
if (arg->mbs > (1 << 24))
return (EINVAL);
data.param.tparam.mbs = arg->mbs;
break;
case ATMIO_TRAFFIC_ABR:
if (arg->icr > arg->pcr || arg->icr < arg->mcr)
return (EINVAL);
data.param.tparam.icr = arg->icr;
if (arg->tbe == 0 || arg->tbe > (1 << 24))
return (EINVAL);
data.param.tparam.tbe = arg->tbe;
if (arg->nrm > 0x7)
return (EINVAL);
data.param.tparam.nrm = arg->nrm;
if (arg->trm > 0x7)
return (EINVAL);
data.param.tparam.trm = arg->trm;
if (arg->adtf > 0x3ff)
return (EINVAL);
data.param.tparam.adtf = arg->adtf;
if (arg->rif > 0xf)
return (EINVAL);
data.param.tparam.rif = arg->rif;
if (arg->rdf > 0xf)
return (EINVAL);
data.param.tparam.rdf = arg->rdf;
if (arg->cdf > 0x7)
return (EINVAL);
data.param.tparam.cdf = arg->cdf;
break;
default:
return (EINVAL);
}
if ((arg->flags & ATMIO_FLAG_NORX) && (arg->flags & ATMIO_FLAG_NOTX))
return (EINVAL);
data.param.flags = arg->flags & ~(ATM_PH_AAL5 | ATM_PH_LLCSNAP);
data.param.flags |= ATMIO_FLAG_NG;
err = (*priv->ifp->if_ioctl)(priv->ifp, SIOCATMOPENVCC, (caddr_t)&data);
if (err == 0) {
vcc->vci = data.param.vci;
vcc->vpi = data.param.vpi;
vcc->flags = VCC_OPEN;
}
return (err);
}
/*
* Issue the close command to the driver
*/
static int
cpcs_term(const struct priv *priv, u_int vpi, u_int vci)
{
struct atmio_closevcc data;
if (priv->ifp->if_ioctl == NULL)
return ENXIO;
data.vpi = vpi;
data.vci = vci;
return ((*priv->ifp->if_ioctl)(priv->ifp,
SIOCATMCLOSEVCC, (caddr_t)&data));
}
/*
* Close a channel by request of the user
*/
static int
ng_atm_cpcs_term(node_p node, const struct ngm_atm_cpcs_term *arg)
{
struct priv *priv = NG_NODE_PRIVATE(node);
struct ngvcc *vcc;
int error;
LIST_FOREACH(vcc, &priv->vccs, link)
if(strcmp(arg->name, NG_HOOK_NAME(vcc->hook)) == 0)
break;
if (vcc == NULL)
return (ENOTCONN);
if (!(vcc->flags & VCC_OPEN))
return (ENOTCONN);
error = cpcs_term(priv, vcc->vpi, vcc->vci);
vcc->vci = 0;
vcc->vpi = 0;
vcc->flags = 0;
return (error);
}
/************************************************************/
/*
* CONTROL MESSAGES
*/
/*
* Produce a textual description of the current status
*/
static int
text_status(node_p node, char *arg, u_int len)
{
const struct priv *priv = NG_NODE_PRIVATE(node);
const struct ifatm_mib *mib;
struct sbuf sbuf;
u_int i;
static const struct {
const char *name;
const char *vendor;
} devices[] = {
ATM_DEVICE_NAMES
};
mib = (const struct ifatm_mib *)(priv->ifp->if_linkmib);
sbuf_new(&sbuf, arg, len, SBUF_FIXEDLEN);
sbuf_printf(&sbuf, "interface: %s\n", priv->ifp->if_xname);
if (mib->device >= nitems(devices))
sbuf_printf(&sbuf, "device=unknown\nvendor=unknown\n");
else
sbuf_printf(&sbuf, "device=%s\nvendor=%s\n",
devices[mib->device].name, devices[mib->device].vendor);
for (i = 0; atmmedia[i].name; i++)
if(mib->media == atmmedia[i].media) {
sbuf_printf(&sbuf, "media=%s\n", atmmedia[i].name);
break;
}
if(atmmedia[i].name == NULL)
sbuf_printf(&sbuf, "media=unknown\n");
sbuf_printf(&sbuf, "serial=%u esi=%6D hardware=%u software=%u\n",
mib->serial, mib->esi, ":", mib->hw_version, mib->sw_version);
sbuf_printf(&sbuf, "pcr=%u vpi_bits=%u vci_bits=%u max_vpcs=%u "
"max_vccs=%u\n", mib->pcr, mib->vpi_bits, mib->vci_bits,
mib->max_vpcs, mib->max_vccs);
sbuf_printf(&sbuf, "ifflags=%b\n", priv->ifp->if_flags, IFFLAGS);
sbuf_finish(&sbuf);
return (sbuf_len(&sbuf));
}
/*
* Get control message
*/
static int
ng_atm_rcvmsg(node_p node, item_p item, hook_p lasthook)
{
const struct priv *priv = NG_NODE_PRIVATE(node);
struct ng_mesg *resp = NULL;
struct ng_mesg *msg;
struct ifatm_mib *mib = (struct ifatm_mib *)(priv->ifp->if_linkmib);
int error = 0;
NGI_GET_MSG(item, msg);
switch (msg->header.typecookie) {
case NGM_GENERIC_COOKIE:
switch (msg->header.cmd) {
case NGM_TEXT_STATUS:
NG_MKRESPONSE(resp, msg, NG_TEXTRESPONSE, M_NOWAIT);
if(resp == NULL) {
error = ENOMEM;
break;
}
resp->header.arglen = text_status(node,
(char *)resp->data, resp->header.arglen) + 1;
break;
default:
error = EINVAL;
break;
}
break;
case NGM_ATM_COOKIE:
switch (msg->header.cmd) {
case NGM_ATM_GET_IFNAME:
NG_MKRESPONSE(resp, msg, IFNAMSIZ, M_NOWAIT);
if (resp == NULL) {
error = ENOMEM;
break;
}
strlcpy(resp->data, priv->ifp->if_xname, IFNAMSIZ);
break;
case NGM_ATM_GET_CONFIG:
{
struct ngm_atm_config *config;
NG_MKRESPONSE(resp, msg, sizeof(*config), M_NOWAIT);
if (resp == NULL) {
error = ENOMEM;
break;
}
config = (struct ngm_atm_config *)resp->data;
config->pcr = mib->pcr;
config->vpi_bits = mib->vpi_bits;
config->vci_bits = mib->vci_bits;
config->max_vpcs = mib->max_vpcs;
config->max_vccs = mib->max_vccs;
break;
}
case NGM_ATM_GET_VCCS:
{
struct atmio_vcctable *vccs;
size_t len;
if (priv->ifp->if_ioctl == NULL) {
error = ENXIO;
break;
}
error = (*priv->ifp->if_ioctl)(priv->ifp,
SIOCATMGETVCCS, (caddr_t)&vccs);
if (error)
break;
len = sizeof(*vccs) +
vccs->count * sizeof(vccs->vccs[0]);
NG_MKRESPONSE(resp, msg, len, M_NOWAIT);
if (resp == NULL) {
error = ENOMEM;
free(vccs, M_DEVBUF);
break;
}
(void)memcpy(resp->data, vccs, len);
free(vccs, M_DEVBUF);
break;
}
case NGM_ATM_GET_VCC:
{
char hook[NG_HOOKSIZ];
struct atmio_vcctable *vccs;
struct ngvcc *vcc;
u_int i;
if (priv->ifp->if_ioctl == NULL) {
error = ENXIO;
break;
}
if (msg->header.arglen != NG_HOOKSIZ) {
error = EINVAL;
break;
}
strncpy(hook, msg->data, NG_HOOKSIZ);
hook[NG_HOOKSIZ - 1] = '\0';
LIST_FOREACH(vcc, &priv->vccs, link)
if (strcmp(NG_HOOK_NAME(vcc->hook), hook) == 0)
break;
if (vcc == NULL) {
error = ENOTCONN;
break;
}
error = (*priv->ifp->if_ioctl)(priv->ifp,
SIOCATMGETVCCS, (caddr_t)&vccs);
if (error)
break;
for (i = 0; i < vccs->count; i++)
if (vccs->vccs[i].vpi == vcc->vpi &&
vccs->vccs[i].vci == vcc->vci)
break;
if (i == vccs->count) {
error = ENOTCONN;
free(vccs, M_DEVBUF);
break;
}
NG_MKRESPONSE(resp, msg, sizeof(vccs->vccs[0]),
M_NOWAIT);
if (resp == NULL) {
error = ENOMEM;
free(vccs, M_DEVBUF);
break;
}
*(struct atmio_vcc *)resp->data = vccs->vccs[i];
free(vccs, M_DEVBUF);
break;
}
case NGM_ATM_GET_VCCID:
{
struct atmio_vcc *arg;
struct atmio_vcctable *vccs;
u_int i;
if (priv->ifp->if_ioctl == NULL) {
error = ENXIO;
break;
}
if (msg->header.arglen != sizeof(*arg)) {
error = EINVAL;
break;
}
arg = (struct atmio_vcc *)msg->data;
error = (*priv->ifp->if_ioctl)(priv->ifp,
SIOCATMGETVCCS, (caddr_t)&vccs);
if (error)
break;
for (i = 0; i < vccs->count; i++)
if (vccs->vccs[i].vpi == arg->vpi &&
vccs->vccs[i].vci == arg->vci)
break;
if (i == vccs->count) {
error = ENOTCONN;
free(vccs, M_DEVBUF);
break;
}
NG_MKRESPONSE(resp, msg, sizeof(vccs->vccs[0]),
M_NOWAIT);
if (resp == NULL) {
error = ENOMEM;
free(vccs, M_DEVBUF);
break;
}
*(struct atmio_vcc *)resp->data = vccs->vccs[i];
free(vccs, M_DEVBUF);
break;
}
case NGM_ATM_CPCS_INIT:
if (msg->header.arglen !=
sizeof(struct ngm_atm_cpcs_init)) {
error = EINVAL;
break;
}
error = ng_atm_cpcs_init(node,
(struct ngm_atm_cpcs_init *)msg->data);
break;
case NGM_ATM_CPCS_TERM:
if (msg->header.arglen !=
sizeof(struct ngm_atm_cpcs_term)) {
error = EINVAL;
break;
}
error = ng_atm_cpcs_term(node,
(struct ngm_atm_cpcs_term *)msg->data);
break;
case NGM_ATM_GET_STATS:
{
struct ngm_atm_stats *p;
if (msg->header.arglen != 0) {
error = EINVAL;
break;
}
NG_MKRESPONSE(resp, msg, sizeof(*p), M_NOWAIT);
if (resp == NULL) {
error = ENOMEM;
break;
}
p = (struct ngm_atm_stats *)resp->data;
p->in_packets = priv->in_packets;
p->out_packets = priv->out_packets;
p->in_errors = priv->in_errors;
p->out_errors = priv->out_errors;
break;
}
default:
error = EINVAL;
break;
}
break;
default:
error = EINVAL;
break;
}
NG_RESPOND_MSG(error, node, item, resp);
NG_FREE_MSG(msg);
return (error);
}
/************************************************************/
/*
* HOOK MANAGEMENT
*/
/*
* A new hook is create that will be connected to the node.
* Check, whether the name is one of the predefined ones.
* If not, create a new entry into the vcc list.
*/
static int
ng_atm_newhook(node_p node, hook_p hook, const char *name)
{
struct priv *priv = NG_NODE_PRIVATE(node);
struct ngvcc *vcc;
if (strcmp(name, "input") == 0) {
priv->input = hook;
NG_HOOK_SET_RCVDATA(hook, ng_atm_rcvdrop);
return (0);
}
if (strcmp(name, "output") == 0) {
priv->output = hook;
NG_HOOK_SET_RCVDATA(hook, ng_atm_rcvdrop);
return (0);
}
if (strcmp(name, "orphans") == 0) {
priv->orphans = hook;
NG_HOOK_SET_RCVDATA(hook, ng_atm_rcvdrop);
return (0);
}
/*
* Allocate a new entry
*/
vcc = malloc(sizeof(*vcc), M_NETGRAPH, M_NOWAIT | M_ZERO);
if (vcc == NULL)
return (ENOMEM);
vcc->hook = hook;
NG_HOOK_SET_PRIVATE(hook, vcc);
LIST_INSERT_HEAD(&priv->vccs, vcc, link);
if (strcmp(name, "manage") == 0)
priv->manage = hook;
return (0);
}
/*
* Connect. Set the peer to queuing.
*/
static int
ng_atm_connect(hook_p hook)
{
if (NG_HOOK_PRIVATE(hook) != NULL)
NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook));
return (0);
}
/*
* Disconnect a HOOK
*/
static int
ng_atm_disconnect(hook_p hook)
{
struct priv *priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
struct ngvcc *vcc = NG_HOOK_PRIVATE(hook);
if (vcc == NULL) {
if (hook == priv->output) {
priv->output = NULL;
return (0);
}
if (hook == priv->input) {
priv->input = NULL;
return (0);
}
if (hook == priv->orphans) {
priv->orphans = NULL;
return (0);
}
log(LOG_ERR, "ng_atm: bad hook '%s'", NG_HOOK_NAME(hook));
return (0);
}
/* don't terminate if we are detaching from the interface */
if ((vcc->flags & VCC_OPEN) && priv->ifp != NULL)
(void)cpcs_term(priv, vcc->vpi, vcc->vci);
NG_HOOK_SET_PRIVATE(hook, NULL);
LIST_REMOVE(vcc, link);
free(vcc, M_NETGRAPH);
if (hook == priv->manage)
priv->manage = NULL;
return (0);
}
/************************************************************/
/*
* NODE MANAGEMENT
*/
/*
* ATM interface attached - create a node and name it like the interface.
*/
static void
ng_atm_attach(struct ifnet *ifp)
{
node_p node;
struct priv *priv;
KASSERT(IFP2NG(ifp) == 0, ("%s: node alreay exists?", __func__));
if (ng_make_node_common(&ng_atm_typestruct, &node) != 0) {
log(LOG_ERR, "%s: can't create node for %s\n",
__func__, ifp->if_xname);
return;
}
priv = malloc(sizeof(*priv), M_NETGRAPH, M_NOWAIT | M_ZERO);
if (priv == NULL) {
log(LOG_ERR, "%s: can't allocate memory for %s\n",
__func__, ifp->if_xname);
NG_NODE_UNREF(node);
return;
}
NG_NODE_SET_PRIVATE(node, priv);
priv->ifp = ifp;
LIST_INIT(&priv->vccs);
IFP2NG_SET(ifp, node);
if (ng_name_node(node, ifp->if_xname) != 0) {
log(LOG_WARNING, "%s: can't name node %s\n",
__func__, ifp->if_xname);
}
}
/*
* ATM interface detached - destroy node.
*/
static void
ng_atm_detach(struct ifnet *ifp)
{
const node_p node = IFP2NG(ifp);
struct priv *priv;
if(node == NULL)
return;
NG_NODE_REALLY_DIE(node);
priv = NG_NODE_PRIVATE(node);
IFP2NG_SET(priv->ifp, NULL);
priv->ifp = NULL;
ng_rmnode_self(node);
}
/*
* Shutdown the node. This is called from the shutdown message processing.
*/
static int
ng_atm_shutdown(node_p node)
{
struct priv *priv = NG_NODE_PRIVATE(node);
if (node->nd_flags & NGF_REALLY_DIE) {
/*
* We are called from unloading the ATM driver. Really,
* really need to shutdown this node. The ifp was
* already handled in the detach routine.
*/
NG_NODE_SET_PRIVATE(node, NULL);
free(priv, M_NETGRAPH);
NG_NODE_UNREF(node);
return (0);
}
#ifdef NGATM_DEBUG
if (!allow_shutdown)
NG_NODE_REVIVE(node); /* we persist */
else {
IFP2NG_SET(priv->ifp, NULL);
NG_NODE_SET_PRIVATE(node, NULL);
free(priv, M_NETGRAPH);
NG_NODE_UNREF(node);
}
#else
/*
* We are persistent - reinitialize.
*/
NG_NODE_REVIVE(node);
#endif
return (0);
}
/*
* Nodes are constructed only via interface attaches.
*/
static int
ng_atm_constructor(node_p nodep)
{
return (EINVAL);
}
/************************************************************/
/*
* INITIALISATION
*/
/*
* Loading and unloading of node type
*
* The assignments to the globals for the hooks should be ok without
* a special hook. The use pattern is generally: check that the pointer
* is not NULL, call the function. In the attach case this is no problem.
* In the detach case we can detach only when no ATM node exists. That
* means that there is no ATM interface anymore. So we are sure that
* we are not in the code path in if_atmsubr.c. To prevent someone
* from adding an interface after we have started to unload the node, we
* take the iflist lock so an if_attach will be blocked until we are done.
* XXX: perhaps the function pointers should be 'volatile' for this to work
* properly.
*/
static int
ng_atm_mod_event(module_t mod, int event, void *data)
{
VNET_ITERATOR_DECL(vnet_iter);
struct ifnet *ifp;
int error = 0;
switch (event) {
case MOD_LOAD:
/*
* Register function hooks
*/
if (ng_atm_attach_p != NULL) {
error = EEXIST;
break;
}
IFNET_RLOCK();
ng_atm_attach_p = ng_atm_attach;
ng_atm_detach_p = ng_atm_detach;
ng_atm_output_p = ng_atm_output;
ng_atm_input_p = ng_atm_input;
ng_atm_input_orphan_p = ng_atm_input_orphans;
ng_atm_event_p = ng_atm_event;
/* Create nodes for existing ATM interfaces */
VNET_LIST_RLOCK();
VNET_FOREACH(vnet_iter) {
CURVNET_SET_QUIET(vnet_iter);
TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
if (ifp->if_type == IFT_ATM)
ng_atm_attach(ifp);
}
CURVNET_RESTORE();
}
VNET_LIST_RUNLOCK();
IFNET_RUNLOCK();
break;
case MOD_UNLOAD:
IFNET_RLOCK();
ng_atm_attach_p = NULL;
ng_atm_detach_p = NULL;
ng_atm_output_p = NULL;
ng_atm_input_p = NULL;
ng_atm_input_orphan_p = NULL;
ng_atm_event_p = NULL;
VNET_LIST_RLOCK();
VNET_FOREACH(vnet_iter) {
CURVNET_SET_QUIET(vnet_iter);
TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
if (ifp->if_type == IFT_ATM)
ng_atm_detach(ifp);
}
CURVNET_RESTORE();
}
VNET_LIST_RUNLOCK();
IFNET_RUNLOCK();
break;
default:
error = EOPNOTSUPP;
break;
}
return (error);
}
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