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/*
* Copyright (c) 2008, 2009 Nicira Networks.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <config.h>
#include "status.h"
#include <arpa/inet.h>
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include "dynamic-string.h"
#include "list.h"
#include "ofpbuf.h"
#include "ofproto.h"
#include "openflow/nicira-ext.h"
#include "rconn.h"
#include "svec.h"
#include "timeval.h"
#include "vconn.h"
#define THIS_MODULE VLM_status
#include "vlog.h"
struct status_category {
struct list node;
char *name;
void (*cb)(struct status_reply *, void *aux);
void *aux;
};
struct switch_status {
time_t booted;
struct status_category *config_cat;
struct status_category *switch_cat;
struct list categories;
};
struct status_reply {
struct status_category *category;
struct ds request;
struct ds output;
};
int
switch_status_handle_request(struct switch_status *ss, struct rconn *rconn,
struct nicira_header *request)
{
struct status_category *c;
struct nicira_header *reply;
struct status_reply sr;
struct ofpbuf *b;
int retval;
sr.request.string = (void *) (request + 1);
sr.request.length = ntohs(request->header.length) - sizeof *request;
ds_init(&sr.output);
LIST_FOR_EACH (c, struct status_category, node, &ss->categories) {
if (!memcmp(c->name, sr.request.string,
MIN(strlen(c->name), sr.request.length))) {
sr.category = c;
c->cb(&sr, c->aux);
}
}
reply = make_openflow_xid(sizeof *reply + sr.output.length,
OFPT_VENDOR, request->header.xid, &b);
reply->vendor = htonl(NX_VENDOR_ID);
reply->subtype = htonl(NXT_STATUS_REPLY);
memcpy(reply + 1, sr.output.string, sr.output.length);
retval = rconn_send(rconn, b, NULL);
if (retval && retval != EAGAIN) {
VLOG_WARN("send failed (%s)", strerror(retval));
}
ds_destroy(&sr.output);
return 0;
}
void
rconn_status_cb(struct status_reply *sr, void *rconn_)
{
struct rconn *rconn = rconn_;
time_t now = time_now();
status_reply_put(sr, "name=%s", rconn_get_name(rconn));
status_reply_put(sr, "state=%s", rconn_get_state(rconn));
status_reply_put(sr, "backoff=%d", rconn_get_backoff(rconn));
status_reply_put(sr, "is-connected=%s",
rconn_is_connected(rconn) ? "true" : "false");
status_reply_put(sr, "sent-msgs=%u", rconn_packets_sent(rconn));
status_reply_put(sr, "received-msgs=%u", rconn_packets_received(rconn));
status_reply_put(sr, "attempted-connections=%u",
rconn_get_attempted_connections(rconn));
status_reply_put(sr, "successful-connections=%u",
rconn_get_successful_connections(rconn));
status_reply_put(sr, "last-connection=%ld",
(long int) (now - rconn_get_last_connection(rconn)));
status_reply_put(sr, "time-connected=%lu",
rconn_get_total_time_connected(rconn));
status_reply_put(sr, "state-elapsed=%u", rconn_get_state_elapsed(rconn));
}
static void
config_status_cb(struct status_reply *sr, void *ofproto_)
{
const struct ofproto *ofproto = ofproto_;
struct svec listeners;
int probe_interval, max_backoff;
size_t i;
svec_init(&listeners);
ofproto_get_listeners(ofproto, &listeners);
for (i = 0; i < listeners.n; i++) {
status_reply_put(sr, "management%zu=%s", i, listeners.names[i]);
}
svec_destroy(&listeners);
probe_interval = ofproto_get_probe_interval(ofproto);
if (probe_interval) {
status_reply_put(sr, "probe-interval=%d", probe_interval);
}
max_backoff = ofproto_get_max_backoff(ofproto);
if (max_backoff) {
status_reply_put(sr, "max-backoff=%d", max_backoff);
}
}
static void
switch_status_cb(struct status_reply *sr, void *ss_)
{
struct switch_status *ss = ss_;
time_t now = time_now();
status_reply_put(sr, "now=%ld", (long int) now);
status_reply_put(sr, "uptime=%ld", (long int) (now - ss->booted));
status_reply_put(sr, "pid=%ld", (long int) getpid());
}
struct switch_status *
switch_status_create(const struct ofproto *ofproto)
{
struct switch_status *ss = xcalloc(1, sizeof *ss);
ss->booted = time_now();
list_init(&ss->categories);
ss->config_cat = switch_status_register(ss, "config", config_status_cb,
(void *) ofproto);
ss->switch_cat = switch_status_register(ss, "switch", switch_status_cb,
ss);
return ss;
}
void
switch_status_destroy(struct switch_status *ss)
{
if (ss) {
/* Orphan any remaining categories, so that unregistering them later
* won't write to bad memory. */
struct status_category *c, *next;
LIST_FOR_EACH_SAFE (c, next,
struct status_category, node, &ss->categories) {
list_init(&c->node);
}
switch_status_unregister(ss->config_cat);
switch_status_unregister(ss->switch_cat);
free(ss);
}
}
struct status_category *
switch_status_register(struct switch_status *ss,
const char *category,
status_cb_func *cb, void *aux)
{
struct status_category *c = xmalloc(sizeof *c);
c->cb = cb;
c->aux = aux;
c->name = xstrdup(category);
list_push_back(&ss->categories, &c->node);
return c;
}
void
switch_status_unregister(struct status_category *c)
{
if (c) {
if (!list_is_empty(&c->node)) {
list_remove(&c->node);
}
free(c->name);
free(c);
}
}
void
status_reply_put(struct status_reply *sr, const char *content, ...)
{
size_t old_length = sr->output.length;
size_t added;
va_list args;
/* Append the status reply to the output. */
ds_put_format(&sr->output, "%s.", sr->category->name);
va_start(args, content);
ds_put_format_valist(&sr->output, content, args);
va_end(args);
if (ds_last(&sr->output) != '\n') {
ds_put_char(&sr->output, '\n');
}
/* Drop what we just added if it doesn't match the request. */
added = sr->output.length - old_length;
if (added < sr->request.length
|| memcmp(&sr->output.string[old_length],
sr->request.string, sr->request.length)) {
ds_truncate(&sr->output, old_length);
}
}
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