/**
* collectd - src/network.c
- * Copyright (C) 2006 Florian octo Forster
+ * Copyright (C) 2005,2006 Florian octo Forster
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
-#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
+#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <syslog.h>
#include <errno.h>
-#include <assert.h>
#include "network.h"
#include "common.h"
+#include "configfile.h"
#include "utils_debug.h"
/* 1500 - 40 - 8 = Ethernet packet - IPv6 header - UDP header */
/* #define BUFF_SIZE 1452 */
+#ifndef IPV6_ADD_MEMBERSHIP
+# ifdef IPV6_JOIN_GROUP
+# define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
+# else
+# error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
+# endif
+#endif /* !IP_ADD_MEMBERSHIP */
+
#define BUFF_SIZE 4096
-#ifdef HAVE_LIBRRD
extern int operating_mode;
-#else
-static int operating_mode = MODE_CLIENT;
-#endif
typedef struct sockent
{
static sockent_t *socklist_head = NULL;
+static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
+{
+ char *ttl_str;
+ int ttl_int;
+
+ ttl_str = cf_get_option ("TimeToLive", NULL);
+ if (ttl_str == NULL)
+ return (-1);
+
+ ttl_int = atoi (ttl_str);
+ if ((ttl_int < 1) || (ttl_int > 255))
+ {
+ syslog (LOG_WARNING, "A TTL value of %i is invalid.", ttl_int);
+ return (-1);
+ }
+
+ DBG ("ttl = %i", ttl_int);
+
+ if (ai->ai_family == AF_INET)
+ {
+ struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
+ int optname;
+
+ if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
+ optname = IP_MULTICAST_TTL;
+ else
+ optname = IP_TTL;
+
+ if (setsockopt (se->fd, IPPROTO_IP, optname,
+ &ttl_int, sizeof (ttl_int)) == -1)
+ {
+ syslog (LOG_ERR, "setsockopt: %s", strerror (errno));
+ return (-1);
+ }
+ }
+ else if (ai->ai_family == AF_INET6)
+ {
+ /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
+ struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
+ int optname;
+
+ if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
+ optname = IPV6_MULTICAST_HOPS;
+ else
+ optname = IPV6_UNICAST_HOPS;
+
+ if (setsockopt (se->fd, IPPROTO_IPV6, optname,
+ &ttl_int, sizeof (ttl_int)) == -1)
+ {
+ syslog (LOG_ERR, "setsockopt: %s", strerror (errno));
+ return (-1);
+ }
+ }
+
+ return (0);
+}
+
static int network_bind_socket (const sockent_t *se, const struct addrinfo *ai)
{
int loop = 1;
DBG ("node = %s, service = %s", node, service);
- if (operating_mode == MODE_LOCAL)
+ if (operating_mode == MODE_LOCAL || operating_mode == MODE_LOG)
return (-1);
socklist_tail = socklist_head;
socklist_tail = socklist_tail->next;
memset (&ai_hints, '\0', sizeof (ai_hints));
- ai_hints.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
+ ai_hints.ai_flags = 0;
+#ifdef AI_PASSIVE
+ ai_hints.ai_flags |= AI_PASSIVE;
+#endif
+#ifdef AI_ADDRCONFIG
+ ai_hints.ai_flags |= AI_ADDRCONFIG;
+#endif
ai_hints.ai_family = PF_UNSPEC;
ai_hints.ai_socktype = SOCK_DGRAM;
- ai_hints.ai_protocol = IPPROTO_UDP; /* XXX is this right here?!? */
+ ai_hints.ai_protocol = IPPROTO_UDP;
if ((ai_return = getaddrinfo (node, service, &ai_hints, &ai_list)) != 0)
{
}
if (operating_mode == MODE_SERVER)
+ {
if (network_bind_socket (se, ai_ptr) != 0)
{
free (se->addr);
free (se);
continue;
}
+ }
+ else if (operating_mode == MODE_CLIENT)
+ {
+ network_set_ttl (se, ai_ptr);
+ }
if (socklist_tail == NULL)
{
if ((fd = network_get_listen_socket ()) < 0)
return (-1);
+ addrlen = sizeof (addr);
if (recvfrom (fd, buffer, BUFF_SIZE, 0, (struct sockaddr *) &addr, &addrlen) == -1)
{
syslog (LOG_ERR, "recvfrom: %s", strerror (errno));
if (se->mode != operating_mode)
continue;
- DBG ("fd = %i", se->fd);
-
while (1)
{
status = sendto (se->fd, buf, buflen, 0,