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Assume the link to be dead if bit error rate (BER) parameter is set to 1.

Browse Source 
When a transition from link alive to link dead configuration or vice
versa occurs, notify any upstream and / or downstream peers using
NGM_FLOW messagges.

Link state notification using NGM_FLOW messages is modelled around
around already existing code in ng_ether.c.

MFC after:	3 days
This commit is contained in:
Marko Zec 2011-05-24 14:36:32 +00:00
parent 7d5ddd30cd
commit 2956ec9bc7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=222257
1 changed files with 30 additions and 1 deletions
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31
sys/netgraph/ng_pipe.c
View File

@ -298,11 +298,12 @@ ngp_rcvmsg(node_p node, item_p item, hook_p lasthook)
{
const priv_p priv = NG_NODE_PRIVATE(node);
struct ng_mesg *resp = NULL;
struct ng_mesg *msg;
struct ng_mesg *msg, *flow_msg;
struct ng_pipe_stats *stats;
struct ng_pipe_run *run;
struct ng_pipe_cfg *cfg;
int error = 0;
int prev_down, now_down, cmd;
NGI_GET_MSG(item, msg);
switch (msg->header.typecookie) {
@ -403,10 +404,38 @@ ngp_rcvmsg(node_p node, item_p item, hook_p lasthook)
cfg->header_offset < 64)
priv->header_offset = cfg->header_offset;
prev_down = priv->upper.cfg.ber == 1 ||
priv->lower.cfg.ber == 1;
parse_cfg(&priv->upper.cfg, &cfg->downstream,
&priv->upper, priv);
parse_cfg(&priv->lower.cfg, &cfg->upstream,
&priv->lower, priv);
now_down = priv->upper.cfg.ber == 1 ||
priv->lower.cfg.ber == 1;
if (prev_down != now_down) {
if (now_down)
cmd = NGM_LINK_IS_DOWN;
else
cmd = NGM_LINK_IS_UP;
if (priv->lower.hook != NULL) {
NG_MKMESSAGE(flow_msg, NGM_FLOW_COOKIE,
cmd, 0, M_NOWAIT);
if (flow_msg != NULL)
NG_SEND_MSG_HOOK(error, node,
flow_msg, priv->lower.hook,
0);
}
if (priv->upper.hook != NULL) {
NG_MKMESSAGE(flow_msg, NGM_FLOW_COOKIE,
cmd, 0, M_NOWAIT);
if (flow_msg != NULL)
NG_SEND_MSG_HOOK(error, node,
flow_msg, priv->upper.hook,
0);
}
}
break;
default:
error = EINVAL;