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o Use ng_timeout() instead of timeout(9).

Browse Source 
o Implement some netgraph flow control:
- Whenever status of HDLC heartbeat from pear is timed out,
  send NGM_LINK_IS_DOWN message.
- If HDLC link changes status from down to up, send
  NGM_LINK_IS_UP message.

Approved by:	julian (mentor), implicitly
MFC after:	1 week
This commit is contained in:
Gleb Smirnoff 2004-11-23 09:30:27 +00:00
parent d938e8d640
commit ea9a9044b1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=138009
1 changed files with 33 additions and 11 deletions
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44
sys/netgraph/ng_cisco.c
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@ -103,7 +103,7 @@ struct cisco_priv {
u_long seqRetries; /* how many times we've been here throwing out
* the same sequence number without ack */
node_p node;
struct callout_handle handle;
struct callout handle;
struct protoent downstream;
struct protoent inet; /* IP information */
struct in_addr localip;
@ -124,8 +124,9 @@ static ng_disconnect_t cisco_disconnect;
/* Other functions */
static int cisco_input(sc_p sc, item_p item);
static void cisco_keepalive(void *arg);
static void cisco_keepalive(node_p node, hook_p hook, void *arg1, int arg2);
static int cisco_send(sc_p sc, int type, long par1, long par2);
static void cisco_notify(sc_p sc, uint32_t cmd);
/* Parse type for struct ng_cisco_ipaddr */
static const struct ng_parse_struct_field ng_cisco_ipaddr_type_fields[]
@ -195,7 +196,7 @@ cisco_constructor(node_p node)
if (sc == NULL)
return (ENOMEM);
callout_handle_init(&sc->handle);
ng_callout_init(&sc->handle);
NG_NODE_SET_PRIVATE(node, sc);
sc->node = node;
@ -221,7 +222,8 @@ cisco_newhook(node_p node, hook_p hook, const char *name)
NG_HOOK_SET_PRIVATE(hook, &sc->downstream);
/* Start keepalives */
sc->handle = timeout(cisco_keepalive, sc, hz * KEEPALIVE_SECS);
ng_timeout(&sc->handle, node, NULL, (hz * KEEPALIVE_SECS),
&cisco_keepalive, (void *)sc, 0);
} else if (strcmp(name, NG_CISCO_HOOK_INET) == 0) {
sc->inet.hook = hook;
NG_HOOK_SET_PRIVATE(hook, &sc->inet);
@ -421,10 +423,9 @@ cisco_disconnect(hook_p hook)
/* Check it's not the debug hook */
if ((pep = NG_HOOK_PRIVATE(hook))) {
pep->hook = NULL;
if (pep->af == 0xffff) {
if (pep->af == 0xffff)
/* If it is the downstream hook, stop the timers */
untimeout(cisco_keepalive, sc, sc->handle);
}
ng_untimeout(&sc->handle, NG_HOOK_NODE(hook));
}
/* If no more hooks, remove the node */
@ -507,6 +508,8 @@ cisco_input(sc_p sc, item_p item)
sc->remote_seq = ntohl(p->par1);
if (sc->local_seq == ntohl(p->par2)) {
sc->local_seq++;
if (sc->seqRetries > 1)
cisco_notify(sc, NGM_LINK_IS_UP);
sc->seqRetries = 0;
}
break;
@ -577,13 +580,15 @@ cisco_input(sc_p sc, item_p item)
* Send keepalive packets, every 10 seconds.
*/
static void
cisco_keepalive(void *arg)
cisco_keepalive(node_p node, hook_p hook, void *arg1, int arg2)
{
const sc_p sc = arg;
const sc_p sc = arg1;
cisco_send(sc, CISCO_KEEPALIVE_REQ, sc->local_seq, sc->remote_seq);
sc->seqRetries++;
sc->handle = timeout(cisco_keepalive, sc, hz * KEEPALIVE_SECS);
if (sc->seqRetries++ > 1)
cisco_notify(sc, NGM_LINK_IS_DOWN);
ng_timeout(&sc->handle, node, NULL, (hz * KEEPALIVE_SECS),
&cisco_keepalive, (void *)sc, 0);
}
/*
@ -625,3 +630,20 @@ cisco_send(sc_p sc, int type, long par1, long par2)
NG_SEND_DATA_ONLY(error, sc->downstream.hook, m);
return (error);
}
/*
* Send linkstate to upstream node.
*/
static void
cisco_notify(sc_p sc, uint32_t cmd)
{
struct ng_mesg *msg;
int dummy_error = 0;
if (sc->inet.hook == NULL) /* nothing to notify */
return;
NG_MKMESSAGE(msg, NGM_FLOW_COOKIE, cmd, 0, M_NOWAIT);
if (msg != NULL)
NG_SEND_MSG_HOOK(dummy_error, sc->node, msg, sc->inet.hook, 0);
}