/*
* Receive data, and do something with it.
* Actually we receive a queue item which holds the data.
* If we free the item it will also free the data unless we have
* previously disassociated it using the NGI_GET_M() macro.
* Possibly send it out on another link after processing.
* Possibly do something different if it comes from different
* hooks. The caller will never free m, so if we use up this data or
* abort we must free it.
*
* If we want, we may decide to force this data to be queued and reprocessed
* at the netgraph NETISR time.
* We would do that by setting the HK_QUEUE flag on our hook. We would do that
* in the connect() method.
*/
static int
ng_xxx_rcvdata(hook_p hook, item_p item )
{
const xxx_p xxxp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
int chan = -2;
int dlci = -2;
int error;
struct mbuf *m;
NGI_GET_M(item, m);
if (NG_HOOK_PRIVATE(hook)) {
dlci = ((struct XXX_hookinfo *) NG_HOOK_PRIVATE(hook))->dlci;
chan = ((struct XXX_hookinfo *) NG_HOOK_PRIVATE(hook))->channel;
if (dlci != -1) {
/* If received on a DLCI hook process for this
* channel and pass it to the downstream module.
* Normally one would add a multiplexing header at
* the front here */
/* M_PREPEND(....) ; */
/* mtod(m, xxxxxx)->dlci = dlci; */
NG_FWD_NEW_DATA(error, item,
xxxp->downstream_hook.hook, m);
xxxp->packets_out++;
} else {
/* data came from the multiplexed link */
dlci = 1; /* get dlci from header */
/* madjust(....) *//* chop off header */
for (chan = 0; chan < XXX_NUM_DLCIS; chan++)
if (xxxp->channel[chan].dlci == dlci)
break;
if (chan == XXX_NUM_DLCIS) {
NG_FREE_ITEM(item);
NG_FREE_M(m);
return (ENETUNREACH);
}
/* If we were called at splnet, use the following:
* NG_SEND_DATA_ONLY(error, otherhook, m); if this
* node is running at some SPL other than SPLNET
* then you should use instead: error =
* ng_queueit(otherhook, m, NULL); m = NULL;
* This queues the data using the standard NETISR
* system and schedules the data to be picked
* up again once the system has moved to SPLNET and
* the processing of the data can continue. After
* these are run 'm' should be considered
* as invalid and NG_SEND_DATA actually zaps them. */
NG_FWD_NEW_DATA(error, item,
xxxp->channel[chan].hook, m);
xxxp->packets_in++;
}
} else {
/* It's the debug hook, throw it away.. */
if (hook == xxxp->downstream_hook.hook) {
NG_FREE_ITEM(item);
NG_FREE_M(m);
}
}
return 0;
}
/*
* This is called once we've already connected a new hook to the other node.
* It gives us a chance to balk at the last minute.
*/
static int
ng_xxx_connect(hook_p hook)
{
#if 0
/*
* If we were a driver running at other than splnet then
* we should set the QUEUE bit on the edge so that we
* will deliver by queing.
*/
if /*it is the upstream hook */
NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook));
#endif
#if 0
/*
* If for some reason we want incoming date to be queued
* by the NETISR system and delivered later we can set the same bit on
* OUR hook. (maybe to allow unwinding of the stack)
*/
if (NG_HOOK_PRIVATE(hook)) {
int dlci;
/*
* If it's dlci 1023, requeue it so that it's handled
* at a lower priority. This is how a node decides to
* defer a data message.
*/
dlci = ((struct XXX_hookinfo *) NG_HOOK_PRIVATE(hook))->dlci;
if (dlci == 1023) {
NG_HOOK_FORCE_QUEUE(hook);
}
#endif
/* otherwise be really amiable and just say "YUP that's OK by me! " */
return (0);
}
/*
* Hook disconnection
*
* For this type, removal of the last link destroys the node
*/
static int
ng_xxx_disconnect(hook_p hook)
{
if (NG_HOOK_PRIVATE(hook))
((struct XXX_hookinfo *) (NG_HOOK_PRIVATE(hook)))->hook = NULL;
if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
&& (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))) /* already shutting down? */
ng_rmnode_self(NG_HOOK_NODE(hook));
return (0);
}
/*
* Hook disconnection
*/
static int
ngt_disconnect(hook_p hook)
{
struct hookinfo *const hinfo = NG_HOOK_PRIVATE(hook);
KASSERT(hinfo != NULL, ("%s: null info", __func__));
hinfo->hook = NULL;
if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
&& (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))))
ng_rmnode_self(NG_HOOK_NODE(hook));
return (0);
}
/*
* Hook disconnection
*/
static int
ng_split_disconnect(hook_p hook)
{
hook_p *localhook = NG_HOOK_PRIVATE(hook);
KASSERT(localhook != NULL, ("%s: null info", __func__));
*localhook = NULL;
if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
&& (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))) {
ng_rmnode_self(NG_HOOK_NODE(hook));
}
return (0);
}
/*
* Hook disconnection
* For this type, removal of any link except "debug" destroys the node.
*/
static int
nglmi_disconnect(hook_p hook)
{
const sc_p sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
/* OK to remove debug hook(s) */
if (NG_HOOK_PRIVATE(hook) == NULL)
return (0);
/* Stop timer if it's currently active */
if (sc->flags & SCF_CONNECTED)
ng_uncallout(&sc->handle, sc->node);
/* Self-destruct */
if (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))
ng_rmnode_self(NG_HOOK_NODE(hook));
return (0);
}
/*
* Hook disconnection
*
* Invalidate the private data associated with this dlci.
* For this type, removal of the last link resets tries to destroy the node.
*/
static int
ngfrm_disconnect(hook_p hook)
{
const sc_p sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
struct ctxinfo *const cp = NG_HOOK_PRIVATE(hook);
int dlci;
/* If it's a regular dlci hook, then free resources etc.. */
if (cp != NULL) {
cp->hook = NULL;
dlci = cp->dlci;
if (dlci != -1)
sc->ALT[dlci] = 0;
cp->flags = 0;
sc->datahooks--;
}
if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
&& (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))))
ng_rmnode_self(NG_HOOK_NODE(hook));
return (0);
}
static int
ng_vlan_rcvmsg(node_p node, item_p item, hook_p lasthook)
{
const priv_p priv = NG_NODE_PRIVATE(node);
struct ng_mesg *msg, *resp = NULL;
struct ng_vlan_filter *vf;
hook_p hook;
struct ng_vlan_table *t;
uintptr_t hook_data;
int i, vlan_count;
uint16_t vid;
int error = 0;
NGI_GET_MSG(item, msg);
/* Deal with message according to cookie and command. */
switch (msg->header.typecookie) {
case NGM_VLAN_COOKIE:
switch (msg->header.cmd) {
case NGM_VLAN_ADD_FILTER:
/* Check that message is long enough. */
if (msg->header.arglen != sizeof(*vf)) {
error = EINVAL;
break;
}
vf = (struct ng_vlan_filter *)msg->data;
/* Sanity check the VLAN ID value. */
#ifdef NG_VLAN_USE_OLD_VLAN_NAME
if (vf->vid == 0 && vf->vid != vf->vlan) {
vf->vid = vf->vlan;
} else if (vf->vid != 0 && vf->vlan != 0 &&
vf->vid != vf->vlan) {
error = EINVAL;
break;
}
#endif
if (vf->vid & ~EVL_VLID_MASK ||
vf->pcp & ~7 ||
vf->cfi & ~1) {
error = EINVAL;
break;
}
/* Check that a referenced hook exists. */
hook = ng_findhook(node, vf->hook_name);
if (hook == NULL) {
error = ENOENT;
break;
}
/* And is not one of the special hooks. */
if (hook == priv->downstream_hook ||
hook == priv->nomatch_hook) {
error = EINVAL;
break;
}
/* And is not already in service. */
if (IS_HOOK_VLAN_SET(NG_HOOK_PRIVATE(hook))) {
error = EEXIST;
break;
}
/* Check we don't already trap this VLAN. */
if (priv->vlan_hook[vf->vid] != NULL) {
error = EEXIST;
break;
}
/* Link vlan and hook together. */
NG_HOOK_SET_PRIVATE(hook,
(void *)(HOOK_VLAN_TAG_SET_MASK |
EVL_MAKETAG(vf->vid, vf->pcp, vf->cfi)));
priv->vlan_hook[vf->vid] = hook;
break;
case NGM_VLAN_DEL_FILTER:
/* Check that message is long enough. */
if (msg->header.arglen != NG_HOOKSIZ) {
error = EINVAL;
break;
}
/* Check that hook exists and is active. */
hook = ng_findhook(node, (char *)msg->data);
if (hook == NULL) {
error = ENOENT;
break;
}
hook_data = (uintptr_t)NG_HOOK_PRIVATE(hook);
if (IS_HOOK_VLAN_SET(hook_data) == 0) {
error = ENOENT;
break;
}
KASSERT(priv->vlan_hook[EVL_VLANOFTAG(hook_data)] == hook,
("%s: NGM_VLAN_DEL_FILTER: Invalid VID for Hook = %s\n",
__func__, (char *)msg->data));
/* Purge a rule that refers to this hook. */
priv->vlan_hook[EVL_VLANOFTAG(hook_data)] = NULL;
NG_HOOK_SET_PRIVATE(hook, NULL);
break;
case NGM_VLAN_DEL_VID_FLT:
/* Check that message is long enough. */
if (msg->header.arglen != sizeof(uint16_t)) {
error = EINVAL;
break;
}
vid = (*((uint16_t *)msg->data));
/* Sanity check the VLAN ID value. */
if (vid & ~EVL_VLID_MASK) {
error = EINVAL;
break;
}
/* Check that hook exists and is active. */
hook = priv->vlan_hook[vid];
if (hook == NULL) {
error = ENOENT;
break;
}
hook_data = (uintptr_t)NG_HOOK_PRIVATE(hook);
if (IS_HOOK_VLAN_SET(hook_data) == 0) {
error = ENOENT;
break;
}
KASSERT(EVL_VLANOFTAG(hook_data) == vid,
("%s: NGM_VLAN_DEL_VID_FLT:"
" Invalid VID Hook = %us, must be: %us\n",
__func__, (uint16_t )EVL_VLANOFTAG(hook_data),
vid));
/* Purge a rule that refers to this hook. */
priv->vlan_hook[vid] = NULL;
NG_HOOK_SET_PRIVATE(hook, NULL);
break;
case NGM_VLAN_GET_TABLE:
/* Calculate vlans. */
vlan_count = 0;
for (i = 0; i < (EVL_VLID_MASK + 1); i ++) {
if (priv->vlan_hook[i] != NULL &&
NG_HOOK_IS_VALID(priv->vlan_hook[i]))
vlan_count ++;
}
/* Allocate memory for responce. */
NG_MKRESPONSE(resp, msg, sizeof(*t) +
vlan_count * sizeof(*t->filter), M_NOWAIT);
if (resp == NULL) {
error = ENOMEM;
break;
}
/* Pack data to responce. */
t = (struct ng_vlan_table *)resp->data;
t->n = 0;
vf = &t->filter[0];
for (i = 0; i < (EVL_VLID_MASK + 1); i ++) {
hook = priv->vlan_hook[i];
if (hook == NULL || NG_HOOK_NOT_VALID(hook))
continue;
hook_data = (uintptr_t)NG_HOOK_PRIVATE(hook);
if (IS_HOOK_VLAN_SET(hook_data) == 0)
continue;
KASSERT(EVL_VLANOFTAG(hook_data) == i,
("%s: NGM_VLAN_GET_TABLE:"
" hook %s VID = %us, must be: %i\n",
__func__, NG_HOOK_NAME(hook),
(uint16_t)EVL_VLANOFTAG(hook_data), i));
#ifdef NG_VLAN_USE_OLD_VLAN_NAME
vf->vlan = i;
#endif
vf->vid = i;
vf->pcp = EVL_PRIOFTAG(hook_data);
vf->cfi = EVL_CFIOFTAG(hook_data);
strncpy(vf->hook_name,
NG_HOOK_NAME(hook), NG_HOOKSIZ);
vf ++;
t->n ++;
}
break;
case NGM_VLAN_GET_DECAP:
NG_MKRESPONSE(resp, msg, sizeof(uint32_t), M_NOWAIT);
if (resp == NULL) {
error = ENOMEM;
break;
}
(*((uint32_t *)resp->data)) = priv->decap_enable;
break;
case NGM_VLAN_SET_DECAP:
if (msg->header.arglen != sizeof(uint32_t)) {
error = EINVAL;
break;
}
priv->decap_enable = (*((uint32_t *)msg->data));
break;
case NGM_VLAN_GET_ENCAP:
NG_MKRESPONSE(resp, msg, sizeof(uint32_t), M_NOWAIT);
if (resp == NULL) {
error = ENOMEM;
break;
}
(*((uint32_t *)resp->data)) = priv->encap_enable;
break;
case NGM_VLAN_SET_ENCAP:
if (msg->header.arglen != sizeof(uint32_t)) {
error = EINVAL;
break;
}
priv->encap_enable = (*((uint32_t *)msg->data));
break;
case NGM_VLAN_GET_ENCAP_PROTO:
NG_MKRESPONSE(resp, msg, sizeof(uint16_t), M_NOWAIT);
if (resp == NULL) {
error = ENOMEM;
break;
}
(*((uint16_t *)resp->data)) = ntohs(priv->encap_proto);
break;
case NGM_VLAN_SET_ENCAP_PROTO:
if (msg->header.arglen != sizeof(uint16_t)) {
error = EINVAL;
break;
}
priv->encap_proto = htons((*((uint16_t *)msg->data)));
break;
default: /* Unknown command. */
error = EINVAL;
break;
}
break;
case NGM_FLOW_COOKIE:
{
struct ng_mesg *copy;
/*
* Flow control messages should come only
* from downstream.
*/
if (lasthook == NULL)
break;
if (lasthook != priv->downstream_hook)
break;
/* Broadcast the event to all uplinks. */
for (i = 0; i < (EVL_VLID_MASK + 1); i ++) {
if (priv->vlan_hook[i] == NULL)
continue;
NG_COPYMESSAGE(copy, msg, M_NOWAIT);
if (copy == NULL)
continue;
NG_SEND_MSG_HOOK(error, node, copy,
priv->vlan_hook[i], 0);
}
break;
}
default: /* Unknown type cookie. */
error = EINVAL;
break;
}
NG_RESPOND_MSG(error, node, item, resp);
NG_FREE_MSG(msg);
return (error);
}
/*
* Receive data on a hook
*
* If data comes in the right link send a copy out right2left, and then
* send the original onwards out through the left link.
* Do the opposite for data coming in from the left link.
* Data coming in right2left or left2right is forwarded
* on through the appropriate destination hook as if it had come
* from the other side.
*/
static int
ngt_rcvdata(hook_p hook, item_p item)
{
const sc_p sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
struct hookinfo *const hinfo = NG_HOOK_PRIVATE(hook);
struct hookinfo *dest;
struct hookinfo *dup;
int error = 0;
struct mbuf *m;
meta_p meta;
m = NGI_M(item);
meta = NGI_META(item); /* leave these owned by the item */
/* Which hook? */
if (hinfo == &sc->left) {
dup = &sc->left2right;
dest = &sc->right;
} else if (hinfo == &sc->right) {
dup = &sc->right2left;
dest = &sc->left;
} else if (hinfo == &sc->right2left) {
dup = NULL;
dest = &sc->right;
} else if (hinfo == &sc->left2right) {
dup = NULL;
dest = &sc->left;
} else {
panic("%s: no hook!", __func__);
#ifdef RESTARTABLE_PANICS
return(EINVAL);
#endif
}
/* Update stats on incoming hook */
hinfo->stats.inOctets += m->m_pkthdr.len;
hinfo->stats.inFrames++;
/*
* Don't make a copy if only the dup hook exists.
*/
if ((dup && dup->hook) && (dest->hook == NULL)) {
dest = dup;
dup = NULL;
}
/* Duplicate packet and meta info if requried */
if (dup != NULL) {
struct mbuf *m2;
meta_p meta2;
/* Copy packet (failure will not stop the original)*/
m2 = m_dup(m, M_NOWAIT);
if (m2) {
/* Copy meta info */
/* If we can't get a copy, tough.. */
if (meta != NULL) {
meta2 = ng_copy_meta(meta);
} else
meta2 = NULL;
/* Deliver duplicate */
dup->stats.outOctets += m->m_pkthdr.len;
dup->stats.outFrames++;
NG_SEND_DATA(error, dup->hook, m2, meta2);
}
}
/* Deliver frame out destination hook */
dest->stats.outOctets += m->m_pkthdr.len;
dest->stats.outFrames++;
if (dest->hook)
NG_FWD_ITEM_HOOK(error, item, dest->hook);
else
NG_FREE_ITEM(item);
return (0);
}
/*
* Receive data packet
*/
static int
ngfrm_rcvdata(hook_p hook, item_p item)
{
struct ctxinfo *const ctxp = NG_HOOK_PRIVATE(hook);
int error = 0;
int dlci;
sc_p sc;
int alen;
char *data;
struct mbuf *m;
/* Data doesn't come in from just anywhere (e.g debug hook) */
if (ctxp == NULL) {
error = ENETDOWN;
goto bad;
}
/* If coming from downstream, decode it to a channel */
dlci = ctxp->dlci;
if (dlci == -1)
return (ngfrm_decode(NG_HOOK_NODE(hook), item));
NGI_GET_M(item, m);
/* Derive the softc we will need */
sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
/* If there is no live channel, throw it away */
if ((sc->downstream.hook == NULL)
|| ((ctxp->flags & CHAN_ACTIVE) == 0)) {
error = ENETDOWN;
goto bad;
}
/* Store the DLCI on the front of the packet */
alen = sc->addrlen;
if (alen == 0)
alen = 2; /* default value for transmit */
M_PREPEND(m, alen, M_DONTWAIT);
if (m == NULL) {
error = ENOBUFS;
goto bad;
}
data = mtod(m, char *);
/*
* Shift the lowest bits into the address field untill we are done.
* First byte is MSBits of addr so work backwards.
*/
switch (alen) {
case 2:
data[0] = data[1] = '\0';
SHIFTOUT(makeup + 1, data[1], dlci);
SHIFTOUT(makeup + 0, data[0], dlci);
data[1] |= BYTEX_EA;
break;
case 3:
data[0] = data[1] = data[2] = '\0';
SHIFTOUT(makeup + 3, data[2], dlci); /* 3 and 2 is correct */
SHIFTOUT(makeup + 1, data[1], dlci);
SHIFTOUT(makeup + 0, data[0], dlci);
data[2] |= BYTEX_EA;
break;
case 4:
data[0] = data[1] = data[2] = data[3] = '\0';
SHIFTOUT(makeup + 3, data[3], dlci);
SHIFTOUT(makeup + 2, data[2], dlci);
SHIFTOUT(makeup + 1, data[1], dlci);
SHIFTOUT(makeup + 0, data[0], dlci);
data[3] |= BYTEX_EA;
break;
default:
panic(__func__);
}
/* Send it */
NG_FWD_NEW_DATA(error, item, sc->downstream.hook, m);
return (error);
bad:
NG_FREE_ITEM(item);
NG_FREE_M(m);
return (error);
}
/*
* receive data, and use it to update our status.
* Anything coming in on the debug port is discarded.
*/
static int
nglmi_rcvdata(hook_p hook, item_p item)
{
sc_p sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
const u_char *data;
unsigned short dlci;
u_short packetlen;
int resptype_seen = 0;
struct mbuf *m;
NGI_GET_M(item, m);
NG_FREE_ITEM(item);
if (NG_HOOK_PRIVATE(hook) == NULL) {
goto drop;
}
packetlen = m->m_len;
/* XXX what if it's more than 1 mbuf? */
if ((packetlen > MHLEN) && !(m->m_flags & M_EXT)) {
log(LOG_WARNING, "nglmi: packetlen (%d) too big\n", packetlen);
goto drop;
}
if (m->m_len < packetlen && (m = m_pullup(m, packetlen)) == NULL) {
log(LOG_WARNING,
"nglmi: m_pullup failed for %d bytes\n", packetlen);
return (0);
}
if (nglmi_checkdata(hook, m) == 0)
return (0);
/* pass the first 4 bytes (already checked in the nglmi_checkdata()) */
data = mtod(m, const u_char *);
STEPBY(4);
/* Now check if there is a 'locking shift'. This is only seen in
* Annex D frames. don't bother checking, we already did that. Don't
* increment immediatly as it might not be there. */
if (ANNEXD(sc))
STEPBY(1);
/* If we get this far we should consider that it is a legitimate
* frame and we know what it is. */
if (sc->flags & SCF_AUTO) {
/* note the hook that this valid channel came from and drop
* out of auto probe mode. */
if (ANNEXA(sc))
sc->protoname = NAME_ANNEXA;
else if (ANNEXD(sc))
sc->protoname = NAME_ANNEXD;
else if (GROUP4(sc))
sc->protoname = NAME_GROUP4;
else {
log(LOG_ERR, "nglmi: No known type\n");
goto drop;
}
sc->lmi_channel = hook;
sc->flags &= ~SCF_AUTO;
log(LOG_INFO, "nglmi: auto-detected %s LMI on DLCI %d\n",
sc->protoname, hook == sc->lmi_channel0 ? 0 : 1023);
}
/* While there is more data in the status packet, keep processing
* status items. First make sure there is enough data for the
* segment descriptor's length field. */
while (packetlen >= 2) {
u_int segtype = data[0];
u_int segsize = data[1];
/* Now that we know how long it claims to be, make sure
* there is enough data for the next seg. */
if (packetlen < segsize + 2)
break;
switch (segtype) {
case 0x01:
case 0x51:
if (resptype_seen) {
log(LOG_WARNING, "nglmi: dup MSGTYPE\n");
goto nextIE;
}
resptype_seen++;
/* The remote end tells us what kind of response
* this is. Only expect a type 0 or 1. if we are a
* full status, invalidate a few DLCIs just to see
* that they are still ok. */
if (segsize != 1)
goto nextIE;
switch (data[2]) {
case 1:
/* partial status, do no extra processing */
break;
case 0:
{
int count = 0;
int idx = sc->invalidx;
for (count = 0; count < 10; count++) {
if (idx > MAXDLCI)
idx = 0;
if (sc->dlci_state[idx] == DLCI_UP)
sc->dlci_state[idx] = DLCI_DOWN;
idx++;
}
sc->invalidx = idx;
/* we got and we wanted one. relax
* now.. but don't reset to 0 if it
* was unrequested. */
if (sc->livs > sc->liv_per_full)
sc->livs = 0;
break;
}
}
break;
case 0x03:
case 0x53:
/* The remote tells us what it thinks the sequence
* numbers are. If it's not size 2, it must be a
* duplicate to have gotten this far, skip it. */
if (segsize != 2)
goto nextIE;
sc->remote_seq = data[2];
if (sc->local_seq == data[3]) {
sc->local_seq++;
sc->seq_retries = 0;
/* Note that all 3 Frame protocols seem to
* not like 0 as a sequence number. */
if (sc->local_seq == 0)
sc->local_seq = 1;
}
break;
case 0x07:
case 0x57:
/* The remote tells us about a DLCI that it knows
* about. There may be many of these in a single
* status response */
switch (segsize) {
case 6:/* only on 'group of 4' */
dlci = ((u_short) data[2] & 0xff) << 8;
dlci |= (data[3] & 0xff);
if ((dlci < 1024) && (dlci > 0)) {
/* XXX */
}
break;
case 3:
dlci = ((u_short) data[2] & 0x3f) << 4;
dlci |= ((data[3] & 0x78) >> 3);
if ((dlci < 1024) && (dlci > 0)) {
/* set up the bottom half of the
* support for that dlci if it's not
* already been done */
/* store this information somewhere */
}
break;
default:
goto nextIE;
}
if (sc->dlci_state[dlci] != DLCI_UP) {
/* bring new DLCI to life */
/* may do more here some day */
if (sc->dlci_state[dlci] != DLCI_DOWN)
log(LOG_INFO,
"nglmi: DLCI %d became active\n",
dlci);
sc->dlci_state[dlci] = DLCI_UP;
}
break;
}
nextIE:
STEPBY(segsize + 2);
}
NG_FREE_M(m);
return (0);
drop:
NG_FREE_M(m);
return (EINVAL);
}