2 * collectd - src/libcollectdclient/network.c
3 * Copyright (C) 2005-2015 Florian Forster
4 * Copyright (C) 2010 Max Henkel
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
25 * Florian Forster <octo at collectd.org>
26 * Max Henkel <henkel at gmx.at>
38 #include <sys/types.h>
39 #include <sys/socket.h>
43 # include <netinet/in.h>
50 #include "collectd/network.h"
51 #include "collectd/network_buffer.h"
58 lcc_server_t *servers;
67 lcc_security_level_t security_level;
75 lcc_network_buffer_t *buffer;
83 static int server_close_socket (lcc_server_t *srv) /* {{{ */
97 } /* }}} int server_close_socket */
99 static void int_server_destroy (lcc_server_t *srv) /* {{{ */
106 server_close_socket (srv);
118 free (srv->username);
119 free (srv->password);
122 int_server_destroy (next);
123 } /* }}} void int_server_destroy */
125 static int server_open_socket (lcc_server_t *srv) /* {{{ */
127 struct addrinfo ai_hints = { 0 };
128 struct addrinfo *ai_list = NULL;
129 struct addrinfo *ai_ptr;
136 server_close_socket (srv);
139 ai_hints.ai_flags |= AI_ADDRCONFIG;
141 ai_hints.ai_family = AF_UNSPEC;
142 ai_hints.ai_socktype = SOCK_DGRAM;
144 status = getaddrinfo (srv->node, srv->service, &ai_hints, &ai_list);
147 assert (ai_list != NULL);
149 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
151 srv->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
155 if (ai_ptr->ai_family == AF_INET)
157 struct sockaddr_in *addr = (struct sockaddr_in *) ai_ptr->ai_addr;
160 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
161 optname = IP_MULTICAST_TTL;
165 status = setsockopt (srv->fd, IPPROTO_IP, optname,
166 &srv->ttl, sizeof (srv->ttl));
168 else if (ai_ptr->ai_family == AF_INET6)
170 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
171 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai_ptr->ai_addr;
174 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
175 optname = IPV6_MULTICAST_HOPS;
177 optname = IPV6_UNICAST_HOPS;
179 status = setsockopt (srv->fd, IPPROTO_IPV6, optname,
180 &srv->ttl, sizeof (srv->ttl));
184 /* setsockopt failed. */
190 srv->sa = malloc (ai_ptr->ai_addrlen);
198 memcpy (srv->sa, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
199 srv->sa_len = ai_ptr->ai_addrlen;
203 freeaddrinfo (ai_list);
208 } /* }}} int server_open_socket */
210 static int server_send_buffer (lcc_server_t *srv) /* {{{ */
212 char buffer[LCC_NETWORK_BUFFER_SIZE_DEFAULT];
218 status = server_open_socket (srv);
223 memset (buffer, 0, sizeof (buffer));
224 buffer_size = sizeof (buffer);
226 status = lcc_network_buffer_finalize (srv->buffer);
229 lcc_network_buffer_initialize (srv->buffer);
233 status = lcc_network_buffer_get (srv->buffer, buffer, &buffer_size);
234 lcc_network_buffer_initialize (srv->buffer);
239 if (buffer_size > sizeof (buffer))
240 buffer_size = sizeof (buffer);
244 assert (srv->fd >= 0);
245 assert (srv->sa != NULL);
246 status = (int) sendto (srv->fd, buffer, buffer_size, /* flags = */ 0,
247 srv->sa, srv->sa_len);
248 if ((status < 0) && ((errno == EINTR) || (errno == EAGAIN)))
257 } /* }}} int server_send_buffer */
259 static int server_value_add (lcc_server_t *srv, /* {{{ */
260 const lcc_value_list_t *vl)
264 status = lcc_network_buffer_add_value (srv->buffer, vl);
268 server_send_buffer (srv);
269 return (lcc_network_buffer_add_value (srv->buffer, vl));
270 } /* }}} int server_value_add */
275 lcc_network_t *lcc_network_create (void) /* {{{ */
279 net = malloc (sizeof (*net));
282 memset (net, 0, sizeof (*net));
287 } /* }}} lcc_network_t *lcc_network_create */
289 void lcc_network_destroy (lcc_network_t *net) /* {{{ */
293 int_server_destroy (net->servers);
295 } /* }}} void lcc_network_destroy */
297 lcc_server_t *lcc_server_create (lcc_network_t *net, /* {{{ */
298 const char *node, const char *service)
302 if ((net == NULL) || (node == NULL))
305 service = NET_DEFAULT_PORT;
307 srv = malloc (sizeof (*srv));
310 memset (srv, 0, sizeof (*srv));
313 srv->security_level = NONE;
314 srv->username = NULL;
315 srv->password = NULL;
318 srv->node = strdup (node);
319 if (srv->node == NULL)
325 srv->service = strdup (service);
326 if (srv->service == NULL)
333 srv->buffer = lcc_network_buffer_create (/* size = */ 0);
334 if (srv->buffer == NULL)
342 if (net->servers == NULL)
348 lcc_server_t *last = net->servers;
350 while (last->next != NULL)
357 } /* }}} lcc_server_t *lcc_server_create */
359 int lcc_server_destroy (lcc_network_t *net, lcc_server_t *srv) /* {{{ */
361 if ((net == NULL) || (srv == NULL))
364 if (net->servers == srv)
366 net->servers = srv->next;
371 lcc_server_t *prev = net->servers;
373 while ((prev != NULL) && (prev->next != srv))
379 prev->next = srv->next;
383 int_server_destroy (srv);
386 } /* }}} int lcc_server_destroy */
388 int lcc_server_set_ttl (lcc_server_t *srv, uint8_t ttl) /* {{{ */
393 srv->ttl = (int) ttl;
396 } /* }}} int lcc_server_set_ttl */
398 int lcc_server_set_interface (lcc_server_t *srv, char const *interface) /* {{{ */
403 if ((srv == NULL) || (interface == NULL))
406 if_index = if_nametoindex (interface);
411 if (srv->sa->sa_family == AF_INET)
413 struct sockaddr_in *addr = (struct sockaddr_in *) srv->sa;
415 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
417 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
418 /* If possible, use the "ip_mreqn" structure which has
419 * an "interface index" member. Using the interface
420 * index is preferred here, because of its similarity
421 * to the way IPv6 handles this. Unfortunately, it
422 * appears not to be portable. */
423 struct ip_mreqn mreq;
425 memset (&mreq, 0, sizeof (mreq));
426 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
427 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
428 mreq.imr_ifindex = if_index;
432 memset (&mreq, 0, sizeof (mreq));
433 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
434 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
437 status = setsockopt (srv->fd, IPPROTO_IP, IP_MULTICAST_IF,
438 &mreq, sizeof (mreq));
447 if (srv->sa->sa_family == AF_INET6)
449 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) srv->sa;
451 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
453 status = setsockopt (srv->fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
454 &if_index, sizeof (if_index));
462 /* else: Not a multicast interface. */
463 #if defined(SO_BINDTODEVICE)
464 status = setsockopt (srv->fd, SOL_SOCKET, SO_BINDTODEVICE,
465 interface, strlen (interface) + 1);
471 } /* }}} int lcc_server_set_interface */
473 int lcc_server_set_security_level (lcc_server_t *srv, /* {{{ */
474 lcc_security_level_t level,
475 const char *username, const char *password)
477 return (lcc_network_buffer_set_security_level (srv->buffer,
478 level, username, password));
479 } /* }}} int lcc_server_set_security_level */
481 int lcc_network_values_send (lcc_network_t *net, /* {{{ */
482 const lcc_value_list_t *vl)
486 if ((net == NULL) || (vl == NULL))
489 for (srv = net->servers; srv != NULL; srv = srv->next)
490 server_value_add (srv, vl);
493 } /* }}} int lcc_network_values_send */
495 /* vim: set sw=2 sts=2 et fdm=marker : */