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git.proxmox.com Git - ovs.git/blob - ofproto/collectors.c
2 * Copyright (c) 2008, 2009, 2010, 2011, 2013, 2014 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include "collectors.h"
23 #include <sys/socket.h>
26 #include "socket-util.h"
31 VLOG_DEFINE_THIS_MODULE(collectors
);
34 int *fds
; /* Sockets. */
35 size_t n_fds
; /* Number of sockets. */
38 /* Opens the targets specified in 'targets' for sending UDP packets. This is
39 * useful for e.g. sending NetFlow or sFlow packets. Returns 0 if successful,
40 * otherwise a positive errno value if opening at least one collector failed.
42 * Each target in 'targets' should be a string in the format "<host>[:<port>]".
43 * <port> may be omitted if 'default_port' is nonzero, in which case it
44 * defaults to 'default_port'.
46 * '*collectorsp' is set to a null pointer if no targets were successfully
47 * added, otherwise to a new collectors object if at least one was successfully
48 * added. Thus, even on a failure return, it is possible that '*collectorsp'
49 * is nonnull, and even on a successful return, it is possible that
50 * '*collectorsp' is null, if 'target's is an empty sset. */
52 collectors_create(const struct sset
*targets
, uint16_t default_port
,
53 struct collectors
**collectorsp
)
59 c
= xmalloc(sizeof *c
);
60 c
->fds
= xmalloc(sizeof *c
->fds
* sset_count(targets
));
62 SSET_FOR_EACH (name
, targets
) {
66 error
= inet_open_active(SOCK_DGRAM
, name
, default_port
, NULL
, &fd
, 0);
68 c
->fds
[c
->n_fds
++] = fd
;
70 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
72 VLOG_WARN_RL(&rl
, "couldn't open connection to collector %s (%s)",
73 name
, ovs_strerror(error
));
83 collectors_destroy(c
);
92 collectors_destroy(struct collectors
*c
)
97 for (i
= 0; i
< c
->n_fds
; i
++) {
105 /* Sends the 'n'-byte 'payload' to each of the collectors in 'c'. */
107 collectors_send(const struct collectors
*c
, const void *payload
, size_t n
)
112 for (i
= 0; i
< c
->n_fds
; i
++) {
113 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
114 if (send(c
->fds
[i
], payload
, n
, 0) == -1) {
115 char *s
= describe_fd(c
->fds
[i
]);
116 VLOG_WARN_RL(&rl
, "%s: sending to collector failed (%s)",
117 s
, ovs_strerror(errno
));
125 collectors_count(const struct collectors
*c
)
127 return c
? c
->n_fds
: 0;