2 * Copyright (c) 2008, 2009, 2010 Nicira Networks.
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 svec. */
52 collectors_create(const struct svec *targets_, uint16_t default_port,
53 struct collectors **collectorsp)
60 svec_clone(&targets, targets_);
61 svec_sort_unique(&targets);
63 c = xmalloc(sizeof *c);
64 c->fds = xmalloc(sizeof *c->fds * targets.n);
66 for (i = 0; i < targets.n; i++) {
67 const char *name = targets.names[i];
71 error = inet_open_active(SOCK_DGRAM, name, default_port, NULL, &fd);
73 c->fds[c->n_fds++] = fd;
75 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
77 VLOG_WARN_RL(&rl, "couldn't open connection to collector %s (%s)",
78 name, strerror(error));
84 svec_destroy(&targets);
89 collectors_destroy(c);
98 collectors_destroy(struct collectors *c)
103 for (i = 0; i < c->n_fds; i++) {
111 /* Sends the 'n'-byte 'payload' to each of the collectors in 'c'. */
113 collectors_send(const struct collectors *c, const void *payload, size_t n)
118 for (i = 0; i < c->n_fds; i++) {
119 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
120 if (send(c->fds[i], payload, n, 0) == -1) {
121 VLOG_WARN_RL(&rl, "sending to collector failed: %s",
129 collectors_count(const struct collectors *c)
131 return c ? c->n_fds : 0;