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)
158 struct sockaddr_in *addr = (struct sockaddr_in *) ai_ptr->ai_addr;
161 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
162 optname = IP_MULTICAST_TTL;
166 setsockopt (srv->fd, IPPROTO_IP, optname,
170 else if (ai_ptr->ai_family == AF_INET6)
172 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
173 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai_ptr->ai_addr;
176 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
177 optname = IPV6_MULTICAST_HOPS;
179 optname = IPV6_UNICAST_HOPS;
181 setsockopt (srv->fd, IPPROTO_IPV6, optname,
186 srv->sa = malloc (ai_ptr->ai_addrlen);
194 memcpy (srv->sa, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
195 srv->sa_len = ai_ptr->ai_addrlen;
199 freeaddrinfo (ai_list);
204 } /* }}} int server_open_socket */
206 static int server_send_buffer (lcc_server_t *srv) /* {{{ */
208 char buffer[LCC_NETWORK_BUFFER_SIZE_DEFAULT];
214 status = server_open_socket (srv);
219 memset (buffer, 0, sizeof (buffer));
220 buffer_size = sizeof (buffer);
222 status = lcc_network_buffer_finalize (srv->buffer);
225 lcc_network_buffer_initialize (srv->buffer);
229 status = lcc_network_buffer_get (srv->buffer, buffer, &buffer_size);
230 lcc_network_buffer_initialize (srv->buffer);
235 if (buffer_size > sizeof (buffer))
236 buffer_size = sizeof (buffer);
240 assert (srv->fd >= 0);
241 assert (srv->sa != NULL);
242 status = (int) sendto (srv->fd, buffer, buffer_size, /* flags = */ 0,
243 srv->sa, srv->sa_len);
244 if ((status < 0) && ((errno == EINTR) || (errno == EAGAIN)))
253 } /* }}} int server_send_buffer */
255 static int server_value_add (lcc_server_t *srv, /* {{{ */
256 const lcc_value_list_t *vl)
260 status = lcc_network_buffer_add_value (srv->buffer, vl);
264 server_send_buffer (srv);
265 return (lcc_network_buffer_add_value (srv->buffer, vl));
266 } /* }}} int server_value_add */
271 lcc_network_t *lcc_network_create (void) /* {{{ */
275 net = malloc (sizeof (*net));
278 memset (net, 0, sizeof (*net));
283 } /* }}} lcc_network_t *lcc_network_create */
285 void lcc_network_destroy (lcc_network_t *net) /* {{{ */
289 int_server_destroy (net->servers);
291 } /* }}} void lcc_network_destroy */
293 lcc_server_t *lcc_server_create (lcc_network_t *net, /* {{{ */
294 const char *node, const char *service)
298 if ((net == NULL) || (node == NULL))
301 service = NET_DEFAULT_PORT;
303 srv = malloc (sizeof (*srv));
306 memset (srv, 0, sizeof (*srv));
309 srv->security_level = NONE;
310 srv->username = NULL;
311 srv->password = NULL;
314 srv->node = strdup (node);
315 if (srv->node == NULL)
321 srv->service = strdup (service);
322 if (srv->service == NULL)
329 srv->buffer = lcc_network_buffer_create (/* size = */ 0);
330 if (srv->buffer == NULL)
338 if (net->servers == NULL)
344 lcc_server_t *last = net->servers;
346 while (last->next != NULL)
353 } /* }}} lcc_server_t *lcc_server_create */
355 int lcc_server_destroy (lcc_network_t *net, lcc_server_t *srv) /* {{{ */
357 if ((net == NULL) || (srv == NULL))
360 if (net->servers == srv)
362 net->servers = srv->next;
367 lcc_server_t *prev = net->servers;
369 while ((prev != NULL) && (prev->next != srv))
375 prev->next = srv->next;
379 int_server_destroy (srv);
382 } /* }}} int lcc_server_destroy */
384 int lcc_server_set_ttl (lcc_server_t *srv, uint8_t ttl) /* {{{ */
389 srv->ttl = (int) ttl;
392 } /* }}} int lcc_server_set_ttl */
394 int lcc_server_set_interface (lcc_server_t *srv, char const *interface) /* {{{ */
396 unsigned int if_index;
399 if ((srv == NULL) || (interface == NULL))
402 if_index = if_nametoindex (interface);
407 if (srv->sa->sa_family == AF_INET)
409 struct sockaddr_in *addr = (struct sockaddr_in *) srv->sa;
411 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
413 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
414 /* If possible, use the "ip_mreqn" structure which has
415 * an "interface index" member. Using the interface
416 * index is preferred here, because of its similarity
417 * to the way IPv6 handles this. Unfortunately, it
418 * appears not to be portable. */
419 struct ip_mreqn mreq;
421 memset (&mreq, 0, sizeof (mreq));
422 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
423 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
424 mreq.imr_ifindex = (int) if_index;
428 memset (&mreq, 0, sizeof (mreq));
429 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
430 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
433 status = setsockopt (srv->fd, IPPROTO_IP, IP_MULTICAST_IF,
434 &mreq, sizeof (mreq));
443 if (srv->sa->sa_family == AF_INET6)
445 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) srv->sa;
447 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
449 status = setsockopt (srv->fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
450 &if_index, sizeof (if_index));
458 /* else: Not a multicast interface. */
459 #if defined(SO_BINDTODEVICE)
460 status = setsockopt (srv->fd, SOL_SOCKET, SO_BINDTODEVICE, interface,
461 (socklen_t) (strlen (interface) + 1));
467 } /* }}} int lcc_server_set_interface */
469 int lcc_server_set_security_level (lcc_server_t *srv, /* {{{ */
470 lcc_security_level_t level,
471 const char *username, const char *password)
473 return (lcc_network_buffer_set_security_level (srv->buffer,
474 level, username, password));
475 } /* }}} int lcc_server_set_security_level */
477 int lcc_network_values_send (lcc_network_t *net, /* {{{ */
478 const lcc_value_list_t *vl)
482 if ((net == NULL) || (vl == NULL))
485 for (srv = net->servers; srv != NULL; srv = srv->next)
486 server_value_add (srv, vl);
489 } /* }}} int lcc_network_values_send */
491 /* vim: set sw=2 sts=2 et fdm=marker : */