2 * collectd - src/libcollectdclient/network.c
3 * Copyright (C) 2005-2014 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>
48 #include <sys/types.h>
49 #include <sys/socket.h>
53 # include <netinet/in.h>
62 #include "collectd/network.h"
63 #include "collectd/network_buffer.h"
70 lcc_server_t *servers;
79 lcc_security_level_t security_level;
87 lcc_network_buffer_t *buffer;
95 static int server_close_socket (lcc_server_t *srv) /* {{{ */
109 } /* }}} int server_close_socket */
111 static void int_server_destroy (lcc_server_t *srv) /* {{{ */
118 server_close_socket (srv);
130 free (srv->username);
131 free (srv->password);
134 int_server_destroy (next);
135 } /* }}} void int_server_destroy */
137 static int server_open_socket (lcc_server_t *srv) /* {{{ */
139 struct addrinfo ai_hints = { 0 };
140 struct addrinfo *ai_list = NULL;
141 struct addrinfo *ai_ptr;
148 server_close_socket (srv);
151 ai_hints.ai_flags |= AI_ADDRCONFIG;
153 ai_hints.ai_family = AF_UNSPEC;
154 ai_hints.ai_socktype = SOCK_DGRAM;
156 status = getaddrinfo (srv->node, srv->service, &ai_hints, &ai_list);
159 assert (ai_list != NULL);
161 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
163 srv->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
167 if (ai_ptr->ai_family == AF_INET)
170 struct sockaddr_in *addr = (struct sockaddr_in *) ai_ptr->ai_addr;
173 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
174 optname = IP_MULTICAST_TTL;
178 setsockopt (srv->fd, IPPROTO_IP, optname,
182 else if (ai_ptr->ai_family == AF_INET6)
184 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
185 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai_ptr->ai_addr;
188 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
189 optname = IPV6_MULTICAST_HOPS;
191 optname = IPV6_UNICAST_HOPS;
193 setsockopt (srv->fd, IPPROTO_IPV6, optname,
198 srv->sa = malloc (ai_ptr->ai_addrlen);
206 memcpy (srv->sa, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
207 srv->sa_len = ai_ptr->ai_addrlen;
211 freeaddrinfo (ai_list);
216 } /* }}} int server_open_socket */
218 static int server_send_buffer (lcc_server_t *srv) /* {{{ */
220 char buffer[LCC_NETWORK_BUFFER_SIZE_DEFAULT];
226 status = server_open_socket (srv);
231 memset (buffer, 0, sizeof (buffer));
232 buffer_size = sizeof (buffer);
234 lcc_network_buffer_finalize (srv->buffer);
235 status = lcc_network_buffer_get (srv->buffer, buffer, &buffer_size);
236 lcc_network_buffer_initialize (srv->buffer);
241 if (buffer_size > sizeof (buffer))
242 buffer_size = sizeof (buffer);
246 assert (srv->fd >= 0);
247 assert (srv->sa != NULL);
248 status = (int) sendto (srv->fd, buffer, buffer_size, /* flags = */ 0,
249 srv->sa, srv->sa_len);
250 if ((status < 0) && ((errno == EINTR) || (errno == EAGAIN)))
259 } /* }}} int server_send_buffer */
261 static int server_value_add (lcc_server_t *srv, /* {{{ */
262 const lcc_value_list_t *vl)
266 status = lcc_network_buffer_add_value (srv->buffer, vl);
270 server_send_buffer (srv);
271 return (lcc_network_buffer_add_value (srv->buffer, vl));
272 } /* }}} int server_value_add */
277 lcc_network_t *lcc_network_create (void) /* {{{ */
281 net = malloc (sizeof (*net));
284 memset (net, 0, sizeof (*net));
289 } /* }}} lcc_network_t *lcc_network_create */
291 void lcc_network_destroy (lcc_network_t *net) /* {{{ */
295 int_server_destroy (net->servers);
297 } /* }}} void lcc_network_destroy */
299 lcc_server_t *lcc_server_create (lcc_network_t *net, /* {{{ */
300 const char *node, const char *service)
304 if ((net == NULL) || (node == NULL))
307 service = NET_DEFAULT_PORT;
309 srv = malloc (sizeof (*srv));
312 memset (srv, 0, sizeof (*srv));
315 srv->security_level = NONE;
316 srv->username = NULL;
317 srv->password = NULL;
320 srv->node = strdup (node);
321 if (srv->node == NULL)
327 srv->service = strdup (service);
328 if (srv->service == NULL)
335 srv->buffer = lcc_network_buffer_create (/* size = */ 0);
336 if (srv->buffer == NULL)
344 if (net->servers == NULL)
350 lcc_server_t *last = net->servers;
352 while (last->next != NULL)
359 } /* }}} lcc_server_t *lcc_server_create */
361 int lcc_server_destroy (lcc_network_t *net, lcc_server_t *srv) /* {{{ */
363 if ((net == NULL) || (srv == NULL))
366 if (net->servers == srv)
368 net->servers = srv->next;
373 lcc_server_t *prev = net->servers;
375 while ((prev != NULL) && (prev->next != srv))
381 prev->next = srv->next;
385 int_server_destroy (srv);
388 } /* }}} int lcc_server_destroy */
390 int lcc_server_set_ttl (lcc_server_t *srv, uint8_t ttl) /* {{{ */
395 srv->ttl = (int) ttl;
398 } /* }}} int lcc_server_set_ttl */
401 int lcc_server_set_interface (lcc_server_t *srv, char const *ifname) /* {{{ */
404 } /* }}} int lcc_server_set_interface */
406 int lcc_server_set_interface (lcc_server_t *srv, char const *ifname) /* {{{ */
411 if ((srv == NULL) || (ifname == NULL))
414 if_index = if_nametoindex (ifname);
419 if (srv->sa->sa_family == AF_INET)
421 struct sockaddr_in *addr = (struct sockaddr_in *) srv->sa;
423 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
425 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
426 /* If possible, use the "ip_mreqn" structure which has
427 * an "interface index" member. Using the interface
428 * index is preferred here, because of its similarity
429 * to the way IPv6 handles this. Unfortunately, it
430 * appears not to be portable. */
431 struct ip_mreqn mreq;
433 memset (&mreq, 0, sizeof (mreq));
434 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
435 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
436 mreq.imr_ifindex = if_index;
440 memset (&mreq, 0, sizeof (mreq));
441 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
442 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
445 status = setsockopt (srv->fd, IPPROTO_IP, IP_MULTICAST_IF,
446 (void *) &mreq, sizeof (mreq));
455 if (srv->sa->sa_family == AF_INET6)
457 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) srv->sa;
459 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
461 status = setsockopt (srv->fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
462 (void *) &if_index, sizeof (if_index));
470 /* else: Not a multicast interface. */
471 #if defined(SO_BINDTODEVICE)
472 status = setsockopt (srv->fd, SOL_SOCKET, SO_BINDTODEVICE,
473 ifname, strlen (ifname) + 1);
479 } /* }}} int lcc_server_set_interface */
482 int lcc_server_set_security_level (lcc_server_t *srv, /* {{{ */
483 lcc_security_level_t level,
484 const char *username, const char *password)
486 return (lcc_network_buffer_set_security_level (srv->buffer,
487 level, username, password));
488 } /* }}} int lcc_server_set_security_level */
490 int lcc_network_values_send (lcc_network_t *net, /* {{{ */
491 const lcc_value_list_t *vl)
495 if ((net == NULL) || (vl == NULL))
498 for (srv = net->servers; srv != NULL; srv = srv->next)
499 server_value_add (srv, vl);
502 } /* }}} int lcc_network_values_send */
504 /* vim: set sw=2 sts=2 et fdm=marker : */