2 * collectd - src/libcollectdclient/network.c
3 * Copyright (C) 2005-2012 Florian octo Forster
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
24 * Florian octo Forster <octo at collectd.org>
36 #include <sys/types.h>
37 #include <sys/socket.h>
41 # include <netinet/in.h>
44 #include "collectd/network.h"
45 #include "collectd/network_buffer.h"
52 lcc_server_t *servers;
61 lcc_security_level_t security_level;
69 lcc_network_buffer_t *buffer;
77 static int server_close_socket (lcc_server_t *srv) /* {{{ */
91 } /* }}} int server_close_socket */
93 static void int_server_destroy (lcc_server_t *srv) /* {{{ */
100 server_close_socket (srv);
112 free (srv->username);
113 free (srv->password);
116 int_server_destroy (next);
117 } /* }}} void int_server_destroy */
119 static int server_open_socket (lcc_server_t *srv) /* {{{ */
121 struct addrinfo ai_hints = { 0 };
122 struct addrinfo *ai_list = NULL;
123 struct addrinfo *ai_ptr;
130 server_close_socket (srv);
133 ai_hints.ai_flags |= AI_ADDRCONFIG;
135 ai_hints.ai_family = AF_UNSPEC;
136 ai_hints.ai_socktype = SOCK_DGRAM;
138 status = getaddrinfo (srv->node, srv->service, &ai_hints, &ai_list);
141 assert (ai_list != NULL);
143 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
145 srv->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
149 if (ai_ptr->ai_family == AF_INET)
152 struct sockaddr_in *addr = (struct sockaddr_in *) ai_ptr->ai_addr;
155 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
156 optname = IP_MULTICAST_TTL;
160 setsockopt (srv->fd, IPPROTO_IP, optname,
164 else if (ai_ptr->ai_family == AF_INET6)
166 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
167 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai_ptr->ai_addr;
170 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
171 optname = IPV6_MULTICAST_HOPS;
173 optname = IPV6_UNICAST_HOPS;
175 setsockopt (srv->fd, IPPROTO_IPV6, optname,
180 srv->sa = malloc (ai_ptr->ai_addrlen);
188 memcpy (srv->sa, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
189 srv->sa_len = ai_ptr->ai_addrlen;
193 freeaddrinfo (ai_list);
198 } /* }}} int server_open_socket */
200 static int server_send_buffer (lcc_server_t *srv) /* {{{ */
202 char buffer[LCC_NETWORK_BUFFER_SIZE_DEFAULT];
208 status = server_open_socket (srv);
213 memset (buffer, 0, sizeof (buffer));
214 buffer_size = sizeof (buffer);
216 lcc_network_buffer_finalize (srv->buffer);
217 status = lcc_network_buffer_get (srv->buffer, buffer, &buffer_size);
218 lcc_network_buffer_initialize (srv->buffer);
223 if (buffer_size > sizeof (buffer))
224 buffer_size = sizeof (buffer);
228 assert (srv->fd >= 0);
229 assert (srv->sa != NULL);
230 status = (int) sendto (srv->fd, buffer, buffer_size, /* flags = */ 0,
231 srv->sa, srv->sa_len);
232 if ((status < 0) && ((errno == EINTR) || (errno == EAGAIN)))
241 } /* }}} int server_send_buffer */
243 static int server_value_add (lcc_server_t *srv, /* {{{ */
244 const lcc_value_list_t *vl)
248 status = lcc_network_buffer_add_value (srv->buffer, vl);
252 server_send_buffer (srv);
253 return (lcc_network_buffer_add_value (srv->buffer, vl));
254 } /* }}} int server_value_add */
259 lcc_network_t *lcc_network_create (void) /* {{{ */
263 net = malloc (sizeof (*net));
266 memset (net, 0, sizeof (*net));
271 } /* }}} lcc_network_t *lcc_network_create */
273 void lcc_network_destroy (lcc_network_t *net) /* {{{ */
277 int_server_destroy (net->servers);
279 } /* }}} void lcc_network_destroy */
281 lcc_server_t *lcc_server_create (lcc_network_t *net, /* {{{ */
282 const char *node, const char *service)
286 if ((net == NULL) || (node == NULL))
289 service = NET_DEFAULT_PORT;
291 srv = malloc (sizeof (*srv));
294 memset (srv, 0, sizeof (*srv));
297 srv->security_level = NONE;
298 srv->username = NULL;
299 srv->password = NULL;
302 srv->node = strdup (node);
303 if (srv->node == NULL)
309 srv->service = strdup (service);
310 if (srv->service == NULL)
317 srv->buffer = lcc_network_buffer_create (/* size = */ 0);
318 if (srv->buffer == NULL)
326 if (net->servers == NULL)
332 lcc_server_t *last = net->servers;
334 while (last->next != NULL)
341 } /* }}} lcc_server_t *lcc_server_create */
343 int lcc_server_destroy (lcc_network_t *net, lcc_server_t *srv) /* {{{ */
345 if ((net == NULL) || (srv == NULL))
348 if (net->servers == srv)
350 net->servers = srv->next;
355 lcc_server_t *prev = net->servers;
357 while ((prev != NULL) && (prev->next != srv))
363 prev->next = srv->next;
367 int_server_destroy (srv);
370 } /* }}} int lcc_server_destroy */
372 int lcc_server_set_ttl (lcc_server_t *srv, uint8_t ttl) /* {{{ */
377 srv->ttl = (int) ttl;
380 } /* }}} int lcc_server_set_ttl */
382 int lcc_server_set_security_level (lcc_server_t *srv, /* {{{ */
383 lcc_security_level_t level,
384 const char *username, const char *password)
386 return (lcc_network_buffer_set_security_level (srv->buffer,
387 level, username, password));
388 } /* }}} int lcc_server_set_security_level */
390 int lcc_network_values_send (lcc_network_t *net, /* {{{ */
391 const lcc_value_list_t *vl)
395 if ((net == NULL) || (vl == NULL))
398 for (srv = net->servers; srv != NULL; srv = srv->next)
399 server_value_add (srv, vl);
402 } /* }}} int lcc_network_values_send */
404 /* vim: set sw=2 sts=2 et fdm=marker : */