/**
* collectd - src/network.c
- * Copyright (C) 2005,2006 Florian octo Forster
+ * Copyright (C) 2005-2007 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
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
+ * Free Software Foundation; only version 2 of the License is applicable.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* Florian octo Forster <octo at verplant.org>
**/
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.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 "network.h"
+#include "collectd.h"
+#include "plugin.h"
#include "common.h"
#include "configfile.h"
-#include "utils_debug.h"
+#include "utils_avltree.h"
+
+#include "network.h"
+
+#if HAVE_PTHREAD_H
+# include <pthread.h>
+#endif
+#if HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif
+#if HAVE_NETDB_H
+# include <netdb.h>
+#endif
+#if HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+#if HAVE_ARPA_INET_H
+# include <arpa/inet.h>
+#endif
+#if HAVE_POLL_H
+# include <poll.h>
+#endif
/* 1500 - 40 - 8 = Ethernet packet - IPv6 header - UDP header */
/* #define BUFF_SIZE 1452 */
# endif
#endif /* !IP_ADD_MEMBERSHIP */
-#define BUFF_SIZE 4096
-
-extern int operating_mode;
+#define BUFF_SIZE 1024
+/*
+ * Private data types
+ */
typedef struct sockent
{
int fd;
- int mode;
struct sockaddr_storage *addr;
socklen_t addrlen;
struct sockent *next;
} sockent_t;
-static sockent_t *socklist_head = NULL;
+/* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-------+-----------------------+-------------------------------+
+ * ! Ver. ! ! Length !
+ * +-------+-----------------------+-------------------------------+
+ */
+struct part_header_s
+{
+ uint16_t type;
+ uint16_t length;
+};
+typedef struct part_header_s part_header_t;
+
+/* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-------------------------------+-------------------------------+
+ * ! Type ! Length !
+ * +-------------------------------+-------------------------------+
+ * : (Length - 4) Bytes :
+ * +---------------------------------------------------------------+
+ */
+struct part_string_s
+{
+ part_header_t *head;
+ char *value;
+};
+typedef struct part_string_s part_string_t;
+
+/* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-------------------------------+-------------------------------+
+ * ! Type ! Length !
+ * +-------------------------------+-------------------------------+
+ * : (Length - 4 == 2 || 4 || 8) Bytes :
+ * +---------------------------------------------------------------+
+ */
+struct part_number_s
+{
+ part_header_t *head;
+ uint64_t *value;
+};
+typedef struct part_number_s part_number_t;
+
+/* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-------------------------------+-------------------------------+
+ * ! Type ! Length !
+ * +-------------------------------+---------------+---------------+
+ * ! Num of values ! Type0 ! Type1 !
+ * +-------------------------------+---------------+---------------+
+ * ! Value0 !
+ * ! !
+ * +---------------------------------------------------------------+
+ * ! Value1 !
+ * ! !
+ * +---------------------------------------------------------------+
+ */
+struct part_values_s
+{
+ part_header_t *head;
+ uint16_t *num_values;
+ uint8_t *values_types;
+ value_t *values;
+};
+typedef struct part_values_s part_values_t;
+
+/*
+ * Private variables
+ */
+static const char *config_keys[] =
+{
+ "CacheFlush",
+ "Listen",
+ "Server",
+ "TimeToLive",
+ "Forward"
+};
+static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
+
+static int network_config_ttl = 0;
+static int network_config_forward = 0;
+
+static sockent_t *sending_sockets = NULL;
+
+static struct pollfd *listen_sockets = NULL;
+static int listen_sockets_num = 0;
+static pthread_t listen_thread = 0;
+static int listen_loop = 0;
+
+static char send_buffer[BUFF_SIZE];
+static char *send_buffer_ptr;
+static int send_buffer_fill;
+static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
+static char send_buffer_type[DATA_MAX_NAME_LEN];
+static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static c_avl_tree_t *cache_tree = NULL;
+static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
+static time_t cache_flush_last;
+static int cache_flush_interval = 1800;
+
+/*
+ * Private functions
+ */
+static int cache_flush (void)
+{
+ char **keys = NULL;
+ int keys_num = 0;
-static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
+ char **tmp;
+ int i;
+
+ char *key;
+ time_t *value;
+ c_avl_iterator_t *iter;
+
+ time_t curtime = time (NULL);
+
+ iter = c_avl_get_iterator (cache_tree);
+ while (c_avl_iterator_next (iter, (void *) &key, (void *) &value) == 0)
+ {
+ if ((curtime - *value) <= cache_flush_interval)
+ continue;
+ tmp = (char **) realloc (keys,
+ (keys_num + 1) * sizeof (char *));
+ if (tmp == NULL)
+ {
+ sfree (keys);
+ c_avl_iterator_destroy (iter);
+ ERROR ("network plugin: cache_flush: realloc"
+ " failed.");
+ return (-1);
+ }
+ keys = tmp;
+ keys[keys_num] = key;
+ keys_num++;
+ } /* while (c_avl_iterator_next) */
+ c_avl_iterator_destroy (iter);
+
+ for (i = 0; i < keys_num; i++)
+ {
+ if (c_avl_remove (cache_tree, keys[i], (void *) &key,
+ (void *) &value) != 0)
+ {
+ WARNING ("network plugin: cache_flush: c_avl_remove"
+ " (%s) failed.", keys[i]);
+ continue;
+ }
+
+ sfree (key);
+ sfree (value);
+ }
+
+ sfree (keys);
+
+ DEBUG ("network plugin: cache_flush: Removed %i %s",
+ keys_num, (keys_num == 1) ? "entry" : "entries");
+ cache_flush_last = curtime;
+ return (0);
+} /* int cache_flush */
+
+static int cache_check (const char *type, const value_list_t *vl)
+{
+ char key[1024];
+ time_t *value = NULL;
+ int retval = -1;
+
+ if (cache_tree == NULL)
+ return (-1);
+
+ if (format_name (key, sizeof (key), vl->host, vl->plugin,
+ vl->plugin_instance, type, vl->type_instance))
+ return (-1);
+
+ pthread_mutex_lock (&cache_lock);
+
+ if (c_avl_get (cache_tree, key, (void *) &value) == 0)
+ {
+ if (*value < vl->time)
+ {
+ *value = vl->time;
+ retval = 0;
+ }
+ else
+ {
+ DEBUG ("network plugin: cache_check: *value = %i >= vl->time = %i",
+ (int) *value, (int) vl->time);
+ retval = 1;
+ }
+ }
+ else
+ {
+ char *key_copy = strdup (key);
+ value = malloc (sizeof (time_t));
+ if ((key_copy != NULL) && (value != NULL))
+ {
+ *value = vl->time;
+ c_avl_insert (cache_tree, key_copy, value);
+ retval = 0;
+ }
+ else
+ {
+ sfree (key_copy);
+ sfree (value);
+ }
+ }
+
+ if ((time (NULL) - cache_flush_last) > cache_flush_interval)
+ cache_flush ();
+
+ pthread_mutex_unlock (&cache_lock);
+
+ DEBUG ("network plugin: cache_check: key = %s; time = %i; retval = %i",
+ key, (int) vl->time, retval);
+
+ return (retval);
+} /* int cache_check */
+
+static int write_part_values (char **ret_buffer, int *ret_buffer_len,
+ const data_set_t *ds, const value_list_t *vl)
+{
+ part_values_t pv;
+ int i;
+
+ i = 6 + (9 * vl->values_len);
+ if (*ret_buffer_len < i)
+ return (-1);
+ *ret_buffer_len -= i;
+
+ pv.head = (part_header_t *) *ret_buffer;
+ pv.num_values = (uint16_t *) (pv.head + 1);
+ pv.values_types = (uint8_t *) (pv.num_values + 1);
+ pv.values = (value_t *) (pv.values_types + vl->values_len);
+ *ret_buffer = (void *) (pv.values + vl->values_len);
+
+ pv.head->type = htons (TYPE_VALUES);
+ pv.head->length = htons (6 + (9 * vl->values_len));
+ *pv.num_values = htons ((uint16_t) vl->values_len);
+
+ for (i = 0; i < vl->values_len; i++)
+ {
+ if (ds->ds[i].type == DS_TYPE_COUNTER)
+ {
+ pv.values_types[i] = DS_TYPE_COUNTER;
+ pv.values[i].counter = htonll (vl->values[i].counter);
+ }
+ else
+ {
+ pv.values_types[i] = DS_TYPE_GAUGE;
+ pv.values[i].gauge = vl->values[i].gauge;
+ }
+ } /* for (values) */
+
+ return (0);
+} /* int write_part_values */
+
+static int write_part_number (char **ret_buffer, int *ret_buffer_len,
+ int type, uint64_t value)
+{
+ part_number_t pn;
+
+ if (*ret_buffer_len < 12)
+ return (-1);
+
+ pn.head = (part_header_t *) *ret_buffer;
+ pn.value = (uint64_t *) (pn.head + 1);
+
+ pn.head->type = htons (type);
+ pn.head->length = htons (12);
+ *pn.value = htonll (value);
+
+ *ret_buffer = (char *) (pn.value + 1);
+ *ret_buffer_len -= 12;
+
+ return (0);
+} /* int write_part_number */
+
+static int write_part_string (char **ret_buffer, int *ret_buffer_len,
+ int type, const char *str, int str_len)
{
- char *ttl_str;
- int ttl_int;
+ part_string_t ps;
+ int len;
- ttl_str = cf_get_option ("TimeToLive", NULL);
- if (ttl_str == NULL)
+ len = 4 + str_len + 1;
+ if (*ret_buffer_len < len)
return (-1);
+ *ret_buffer_len -= len;
- ttl_int = atoi (ttl_str);
- if ((ttl_int < 1) || (ttl_int > 255))
+ ps.head = (part_header_t *) *ret_buffer;
+ ps.value = (char *) (ps.head + 1);
+
+ ps.head->type = htons ((uint16_t) type);
+ ps.head->length = htons ((uint16_t) str_len + 5);
+ if (str_len > 0)
+ memcpy (ps.value, str, str_len);
+ ps.value[str_len] = '\0';
+ *ret_buffer = (void *) (ps.value + (str_len + 1));
+
+ return (0);
+} /* int write_part_string */
+
+static int parse_part_values (void **ret_buffer, int *ret_buffer_len,
+ value_t **ret_values, int *ret_num_values)
+{
+ char *buffer = *ret_buffer;
+ int buffer_len = *ret_buffer_len;
+ part_values_t pv;
+ int i;
+
+ uint16_t h_length;
+ uint16_t h_type;
+ uint16_t h_num;
+
+ if (buffer_len < (15))
+ {
+ DEBUG ("network plugin: packet is too short: buffer_len = %i",
+ buffer_len);
+ return (-1);
+ }
+
+ pv.head = (part_header_t *) buffer;
+ h_length = ntohs (pv.head->length);
+ h_type = ntohs (pv.head->type);
+
+ assert (h_type == TYPE_VALUES);
+
+ pv.num_values = (uint16_t *) (pv.head + 1);
+ h_num = ntohs (*pv.num_values);
+
+ if (h_num != ((h_length - 6) / 9))
{
- syslog (LOG_WARNING, "A TTL value of %i is invalid.", ttl_int);
+ DEBUG ("`length' and `num of values' don't match");
return (-1);
}
- DBG ("ttl = %i", ttl_int);
+ pv.values_types = (uint8_t *) (pv.num_values + 1);
+ pv.values = (value_t *) (pv.values_types + h_num);
+
+ for (i = 0; i < h_num; i++)
+ if (pv.values_types[i] == DS_TYPE_COUNTER)
+ pv.values[i].counter = ntohll (pv.values[i].counter);
+
+ *ret_buffer = (void *) (pv.values + h_num);
+ *ret_buffer_len = buffer_len - h_length;
+ *ret_num_values = h_num;
+ *ret_values = pv.values;
+
+ return (0);
+} /* int parse_part_values */
+
+static int parse_part_number (void **ret_buffer, int *ret_buffer_len,
+ uint64_t *value)
+{
+ part_number_t pn;
+ uint16_t len;
+
+ pn.head = (part_header_t *) *ret_buffer;
+ pn.value = (uint64_t *) (pn.head + 1);
+
+ len = ntohs (pn.head->length);
+ if (len != 12)
+ return (-1);
+ if (len > *ret_buffer_len)
+ return (-1);
+ *value = ntohll (*pn.value);
+
+ *ret_buffer = (void *) (pn.value + 1);
+ *ret_buffer_len -= len;
+
+ return (0);
+} /* int parse_part_number */
+
+static int parse_part_string (void **ret_buffer, int *ret_buffer_len,
+ char *output, int output_len)
+{
+ char *buffer = *ret_buffer;
+ int buffer_len = *ret_buffer_len;
+ part_string_t ps;
+
+ uint16_t h_length;
+ uint16_t h_type;
+
+ DEBUG ("network plugin: parse_part_string: ret_buffer = %p;"
+ " ret_buffer_len = %i; output = %p; output_len = %i;",
+ *ret_buffer, *ret_buffer_len,
+ (void *) output, output_len);
+
+ ps.head = (part_header_t *) buffer;
+
+ h_length = ntohs (ps.head->length);
+ h_type = ntohs (ps.head->type);
+
+ DEBUG ("network plugin: parse_part_string: length = %hu; type = %hu;",
+ h_length, h_type);
+
+ if (buffer_len < h_length)
+ {
+ DEBUG ("packet is too short");
+ return (-1);
+ }
+ assert ((h_type == TYPE_HOST)
+ || (h_type == TYPE_PLUGIN)
+ || (h_type == TYPE_PLUGIN_INSTANCE)
+ || (h_type == TYPE_TYPE)
+ || (h_type == TYPE_TYPE_INSTANCE));
+
+ ps.value = buffer + 4;
+ if (ps.value[h_length - 5] != '\0')
+ {
+ DEBUG ("String does not end with a nullbyte");
+ return (-1);
+ }
+
+ if (output_len < (h_length - 4))
+ {
+ DEBUG ("output buffer is too small");
+ return (-1);
+ }
+ strcpy (output, ps.value);
+
+ DEBUG ("network plugin: parse_part_string: output = %s", output);
+
+ *ret_buffer = (void *) (buffer + h_length);
+ *ret_buffer_len = buffer_len - h_length;
+
+ return (0);
+} /* int parse_part_string */
+
+static int parse_packet (void *buffer, int buffer_len)
+{
+ part_header_t *header;
+ int status;
+
+ value_list_t vl = VALUE_LIST_INIT;
+ char type[DATA_MAX_NAME_LEN];
+
+ DEBUG ("network plugin: parse_packet: buffer = %p; buffer_len = %i;",
+ buffer, buffer_len);
+
+ memset (&vl, '\0', sizeof (vl));
+ memset (&type, '\0', sizeof (type));
+ status = 0;
+
+ while ((status == 0) && (buffer_len > sizeof (part_header_t)))
+ {
+ header = (part_header_t *) buffer;
+
+ if (ntohs (header->length) > buffer_len)
+ break;
+ /* Assure that this loop terminates eventually */
+ if (ntohs (header->length) < 4)
+ break;
+
+ if (ntohs (header->type) == TYPE_VALUES)
+ {
+ status = parse_part_values (&buffer, &buffer_len,
+ &vl.values, &vl.values_len);
+
+ if (status != 0)
+ {
+ DEBUG ("parse_part_values failed.");
+ break;
+ }
+
+ if ((vl.time > 0)
+ && (strlen (vl.host) > 0)
+ && (strlen (vl.plugin) > 0)
+ && (strlen (type) > 0)
+ && (cache_check (type, &vl) == 0))
+ {
+ DEBUG ("network plugin: parse_packet:"
+ " dispatching values");
+ plugin_dispatch_values (type, &vl);
+ }
+ else
+ {
+ DEBUG ("network plugin: parse_packet:"
+ " NOT dispatching values");
+ }
+ }
+ else if (ntohs (header->type) == TYPE_TIME)
+ {
+ uint64_t tmp = 0;
+ status = parse_part_number (&buffer, &buffer_len, &tmp);
+ if (status == 0)
+ vl.time = (time_t) tmp;
+ }
+ else if (ntohs (header->type) == TYPE_INTERVAL)
+ {
+ uint64_t tmp = 0;
+ status = parse_part_number (&buffer, &buffer_len, &tmp);
+ if (status == 0)
+ vl.interval = (int) tmp;
+ }
+ else if (ntohs (header->type) == TYPE_HOST)
+ {
+ status = parse_part_string (&buffer, &buffer_len,
+ vl.host, sizeof (vl.host));
+ DEBUG ("network plugin: parse_packet: vl.host = %s", vl.host);
+ }
+ else if (ntohs (header->type) == TYPE_PLUGIN)
+ {
+ status = parse_part_string (&buffer, &buffer_len,
+ vl.plugin, sizeof (vl.plugin));
+ DEBUG ("network plugin: parse_packet: vl.plugin = %s", vl.plugin);
+ }
+ else if (ntohs (header->type) == TYPE_PLUGIN_INSTANCE)
+ {
+ status = parse_part_string (&buffer, &buffer_len,
+ vl.plugin_instance, sizeof (vl.plugin_instance));
+ DEBUG ("network plugin: parse_packet: vl.plugin_instance = %s", vl.plugin_instance);
+ }
+ else if (ntohs (header->type) == TYPE_TYPE)
+ {
+ status = parse_part_string (&buffer, &buffer_len,
+ type, sizeof (type));
+ DEBUG ("network plugin: parse_packet: type = %s", type);
+ }
+ else if (ntohs (header->type) == TYPE_TYPE_INSTANCE)
+ {
+ status = parse_part_string (&buffer, &buffer_len,
+ vl.type_instance, sizeof (vl.type_instance));
+ DEBUG ("network plugin: parse_packet: vl.type_instance = %s", vl.type_instance);
+ }
+ else
+ {
+ DEBUG ("network plugin: parse_packet: Unknown part"
+ " type: 0x%0hx", ntohs (header->type));
+ buffer = ((char *) buffer) + ntohs (header->length);
+ }
+ } /* while (buffer_len > sizeof (part_header_t)) */
+
+ return (0);
+} /* int parse_packet */
+
+static void free_sockent (sockent_t *se)
+{
+ sockent_t *next;
+ while (se != NULL)
+ {
+ next = se->next;
+ free (se->addr);
+ free (se);
+ se = next;
+ }
+} /* void free_sockent */
+
+/*
+ * int network_set_ttl
+ *
+ * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
+ * `IPV6_UNICAST_HOPS', depending on which option is applicable.
+ *
+ * The `struct addrinfo' is used to destinguish between unicast and multicast
+ * sockets.
+ */
+static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
+{
+ if ((network_config_ttl < 1) || (network_config_ttl > 255))
+ return (-1);
+
+ DEBUG ("ttl = %i", network_config_ttl);
if (ai->ai_family == AF_INET)
{
optname = IP_TTL;
if (setsockopt (se->fd, IPPROTO_IP, optname,
- &ttl_int, sizeof (ttl_int)) == -1)
+ &network_config_ttl,
+ sizeof (network_config_ttl)) == -1)
{
- syslog (LOG_ERR, "setsockopt: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("setsockopt: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
}
optname = IPV6_UNICAST_HOPS;
if (setsockopt (se->fd, IPPROTO_IPV6, optname,
- &ttl_int, sizeof (ttl_int)) == -1)
+ &network_config_ttl,
+ sizeof (network_config_ttl)) == -1)
{
- syslog (LOG_ERR, "setsockopt: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("setsockopt: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
return (-1);
}
}
return (0);
-}
+} /* int network_set_ttl */
static int network_bind_socket (const sockent_t *se, const struct addrinfo *ai)
{
- int loop = 1;
+ int loop = 0;
+ int yes = 1;
+
+ /* allow multiple sockets to use the same PORT number */
+ if (setsockopt(se->fd, SOL_SOCKET, SO_REUSEADDR,
+ &yes, sizeof(yes)) == -1) {
+ char errbuf[1024];
+ ERROR ("setsockopt: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
+ }
- DBG ("fd = %i; calling `bind'", se->fd);
+ DEBUG ("fd = %i; calling `bind'", se->fd);
if (bind (se->fd, ai->ai_addr, ai->ai_addrlen) == -1)
{
- syslog (LOG_ERR, "bind: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("bind: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
{
struct ip_mreq mreq;
- DBG ("fd = %i; IPv4 multicast address found", se->fd);
+ DEBUG ("fd = %i; IPv4 multicast address found", se->fd);
mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
mreq.imr_interface.s_addr = htonl (INADDR_ANY);
if (setsockopt (se->fd, IPPROTO_IP, IP_MULTICAST_LOOP,
&loop, sizeof (loop)) == -1)
{
- syslog (LOG_ERR, "setsockopt: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("setsockopt: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
return (-1);
}
if (setsockopt (se->fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
&mreq, sizeof (mreq)) == -1)
{
- syslog (LOG_ERR, "setsockopt: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("setsockopt: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
return (-1);
}
}
{
struct ipv6_mreq mreq;
- DBG ("fd = %i; IPv6 multicast address found", se->fd);
+ DEBUG ("fd = %i; IPv6 multicast address found", se->fd);
memcpy (&mreq.ipv6mr_multiaddr,
&addr->sin6_addr,
if (setsockopt (se->fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
&loop, sizeof (loop)) == -1)
{
- syslog (LOG_ERR, "setsockopt: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("setsockopt: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
return (-1);
}
if (setsockopt (se->fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
&mreq, sizeof (mreq)) == -1)
{
- syslog (LOG_ERR, "setsockopt: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("setsockopt: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
return (-1);
}
}
}
return (0);
-}
+} /* int network_bind_socket */
-int network_create_socket (const char *node, const char *service)
+static sockent_t *network_create_socket (const char *node,
+ const char *service,
+ int listen)
{
- sockent_t *socklist_tail;
-
struct addrinfo ai_hints;
struct addrinfo *ai_list, *ai_ptr;
int ai_return;
- int num_added = 0;
+ sockent_t *se_head = NULL;
+ sockent_t *se_tail = NULL;
- DBG ("node = %s, service = %s", node, service);
-
- if (operating_mode == MODE_LOCAL || operating_mode == MODE_LOG)
- {
- syslog (LOG_WARNING, "network_create_socket: There is no point opening a socket when you are in mode `%s'.",
- operating_mode == MODE_LOCAL ? "Local" : "Log");
- return (-1);
- }
-
- socklist_tail = socklist_head;
- while ((socklist_tail != NULL) && (socklist_tail->next != NULL))
- socklist_tail = socklist_tail->next;
+ DEBUG ("node = %s, service = %s", node, service);
memset (&ai_hints, '\0', sizeof (ai_hints));
ai_hints.ai_flags = 0;
#ifdef AI_ADDRCONFIG
ai_hints.ai_flags |= AI_ADDRCONFIG;
#endif
- ai_hints.ai_family = PF_UNSPEC;
+ ai_hints.ai_family = AF_UNSPEC;
ai_hints.ai_socktype = SOCK_DGRAM;
ai_hints.ai_protocol = IPPROTO_UDP;
- if ((ai_return = getaddrinfo (node, service, &ai_hints, &ai_list)) != 0)
+ ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
+ if (ai_return != 0)
{
- syslog (LOG_ERR, "getaddrinfo (%s, %s): %s",
- node == NULL ? "(null)" : node,
- service == NULL ? "(null)" : service,
- ai_return == EAI_SYSTEM ? strerror (errno) : gai_strerror (ai_return));
- return (-1);
+ char errbuf[1024];
+ ERROR ("getaddrinfo (%s, %s): %s",
+ (node == NULL) ? "(null)" : node,
+ (service == NULL) ? "(null)" : service,
+ (ai_return == EAI_SYSTEM)
+ ? sstrerror (errno, errbuf, sizeof (errbuf))
+ : gai_strerror (ai_return));
+ return (NULL);
}
for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
if ((se = (sockent_t *) malloc (sizeof (sockent_t))) == NULL)
{
- syslog (LOG_EMERG, "malloc: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("malloc: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
continue;
}
if ((se->addr = (struct sockaddr_storage *) malloc (sizeof (struct sockaddr_storage))) == NULL)
{
- syslog (LOG_EMERG, "malloc: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("malloc: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
free (se);
continue;
}
memcpy (se->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
se->addrlen = ai_ptr->ai_addrlen;
- se->mode = operating_mode;
- se->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
+ se->fd = socket (ai_ptr->ai_family,
+ ai_ptr->ai_socktype,
+ ai_ptr->ai_protocol);
se->next = NULL;
if (se->fd == -1)
{
- syslog (LOG_ERR, "socket: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("socket: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
free (se->addr);
free (se);
continue;
}
- if (operating_mode == MODE_SERVER)
+ if (listen != 0)
{
if (network_bind_socket (se, ai_ptr) != 0)
{
+ close (se->fd);
free (se->addr);
free (se);
continue;
}
}
- else if (operating_mode == MODE_CLIENT)
+ else /* listen == 0 */
{
network_set_ttl (se, ai_ptr);
}
- if (socklist_tail == NULL)
+ if (se_tail == NULL)
{
- socklist_head = se;
- socklist_tail = se;
+ se_head = se;
+ se_tail = se;
}
else
{
- socklist_tail->next = se;
- socklist_tail = se;
+ se_tail->next = se;
+ se_tail = se;
}
- num_added++;
-
/* We don't open more than one write-socket per node/service pair.. */
- if (operating_mode == MODE_CLIENT)
+ if (listen == 0)
break;
}
freeaddrinfo (ai_list);
- return (num_added);
-}
+ return (se_head);
+} /* sockent_t *network_create_socket */
-static int network_connect_default (void)
+static sockent_t *network_create_default_socket (int listen)
{
- int ret;
+ sockent_t *se_ptr = NULL;
+ sockent_t *se_head = NULL;
+ sockent_t *se_tail = NULL;
- if (socklist_head != NULL)
- return (0);
+ se_ptr = network_create_socket (NET_DEFAULT_V6_ADDR,
+ NET_DEFAULT_PORT, listen);
- DBG ("socklist_head is NULL");
+ /* Don't send to the same machine in IPv6 and IPv4 if both are available. */
+ if ((listen == 0) && (se_ptr != NULL))
+ return (se_ptr);
- ret = 0;
+ if (se_ptr != NULL)
+ {
+ se_head = se_ptr;
+ se_tail = se_ptr;
+ while (se_tail->next != NULL)
+ se_tail = se_tail->next;
+ }
- if (network_create_socket (NET_DEFAULT_V6_ADDR, NET_DEFAULT_PORT) > 0)
- ret++;
+ se_ptr = network_create_socket (NET_DEFAULT_V4_ADDR, NET_DEFAULT_PORT, listen);
- /* Don't use IPv4 and IPv6 in parallel by default.. */
- if ((operating_mode == MODE_CLIENT) && (ret != 0))
- return (ret);
+ if (se_tail == NULL)
+ return (se_ptr);
- if (network_create_socket (NET_DEFAULT_V4_ADDR, NET_DEFAULT_PORT) > 0)
- ret++;
+ se_tail->next = se_ptr;
+ return (se_head);
+} /* sockent_t *network_create_default_socket */
- if (ret == 0)
- ret = -1;
+static int network_add_listen_socket (const char *node, const char *service)
+{
+ sockent_t *se;
+ sockent_t *se_ptr;
+ int se_num = 0;
- return (ret);
-}
+ if (service == NULL)
+ service = NET_DEFAULT_PORT;
-static int network_get_listen_socket (void)
-{
- int fd;
- int max_fd;
- int status;
+ if (node == NULL)
+ se = network_create_default_socket (1 /* listen == true */);
+ else
+ se = network_create_socket (node, service, 1 /* listen == true */);
- fd_set readfds;
- sockent_t *se;
+ if (se == NULL)
+ return (-1);
+
+ for (se_ptr = se; se_ptr != NULL; se_ptr = se_ptr->next)
+ se_num++;
- if (socklist_head == NULL)
- network_connect_default ();
+ listen_sockets = (struct pollfd *) realloc (listen_sockets,
+ (listen_sockets_num + se_num)
+ * sizeof (struct pollfd));
- FD_ZERO (&readfds);
- max_fd = -1;
- for (se = socklist_head; se != NULL; se = se->next)
+ for (se_ptr = se; se_ptr != NULL; se_ptr = se_ptr->next)
{
- if (se->mode != operating_mode)
- continue;
+ listen_sockets[listen_sockets_num].fd = se_ptr->fd;
+ listen_sockets[listen_sockets_num].events = POLLIN | POLLPRI;
+ listen_sockets[listen_sockets_num].revents = 0;
+ listen_sockets_num++;
+ } /* for (se) */
- FD_SET (se->fd, &readfds);
- if (se->fd >= max_fd)
- max_fd = se->fd + 1;
- }
+ free_sockent (se);
+ return (0);
+} /* int network_add_listen_socket */
- if (max_fd == -1)
- {
- syslog (LOG_WARNING, "No listen sockets found!");
+static int network_add_sending_socket (const char *node, const char *service)
+{
+ sockent_t *se;
+ sockent_t *se_ptr;
+
+ if (service == NULL)
+ service = NET_DEFAULT_PORT;
+
+ if (node == NULL)
+ se = network_create_default_socket (0 /* listen == false */);
+ else
+ se = network_create_socket (node, service, 0 /* listen == false */);
+
+ if (se == NULL)
return (-1);
+
+ if (sending_sockets == NULL)
+ {
+ sending_sockets = se;
+ return (0);
}
- status = select (max_fd, &readfds, NULL, NULL, NULL);
+ for (se_ptr = sending_sockets; se_ptr->next != NULL; se_ptr = se_ptr->next)
+ /* seek end */;
+
+ se_ptr->next = se;
+ return (0);
+} /* int network_get_listen_socket */
- if (status == -1)
+static int network_receive (void)
+{
+ char buffer[BUFF_SIZE];
+ int buffer_len;
+
+ int i;
+ int status;
+
+ if (listen_sockets_num == 0)
+ network_add_listen_socket (NULL, NULL);
+
+ if (listen_sockets_num == 0)
{
- if (errno != EINTR)
- syslog (LOG_ERR, "select: %s", strerror (errno));
+ ERROR ("network: Failed to open a listening socket.");
return (-1);
}
- fd = -1;
- for (se = socklist_head; se != NULL; se = se->next)
+ while (listen_loop == 0)
{
- if (se->mode != operating_mode)
- continue;
+ status = poll (listen_sockets, listen_sockets_num, -1);
- if (FD_ISSET (se->fd, &readfds))
+ if (status <= 0)
{
- fd = se->fd;
- break;
+ char errbuf[1024];
+ if (errno == EINTR)
+ continue;
+ ERROR ("poll failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
}
- }
- if (fd == -1)
- syslog (LOG_WARNING, "No socket ready..?");
+ for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
+ {
+ if ((listen_sockets[i].revents & (POLLIN | POLLPRI)) == 0)
+ continue;
+ status--;
- DBG ("fd = %i", fd);
- return (fd);
+ buffer_len = recv (listen_sockets[i].fd,
+ buffer, sizeof (buffer),
+ 0 /* no flags */);
+ if (buffer_len < 0)
+ {
+ char errbuf[1024];
+ ERROR ("recv failed: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
+ return (-1);
+ }
+
+ parse_packet (buffer, buffer_len);
+ } /* for (listen_sockets) */
+ } /* while (listen_loop == 0) */
+
+ return (0);
}
-int network_receive (char **host, char **type, char **inst, char **value)
+static void *receive_thread (void *arg)
{
- int fd;
- char buffer[BUFF_SIZE];
+ return (network_receive () ? (void *) 1 : (void *) 0);
+} /* void *receive_thread */
- struct sockaddr_storage addr;
- socklen_t addrlen;
+static void network_send_buffer (const char *buffer, int buffer_len)
+{
+ sockent_t *se;
int status;
- char *fields[4];
+ DEBUG ("network plugin: network_send_buffer: buffer_len = %i", buffer_len);
- assert (operating_mode == MODE_SERVER);
+ for (se = sending_sockets; se != NULL; se = se->next)
+ {
+ while (42)
+ {
+ status = sendto (se->fd, buffer, buffer_len, 0 /* no flags */,
+ (struct sockaddr *) se->addr, se->addrlen);
+ if (status < 0)
+ {
+ char errbuf[1024];
+ if (errno == EINTR)
+ continue;
+ ERROR ("network plugin: sendto failed: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
+ break;
+ }
- *host = NULL;
- *type = NULL;
- *inst = NULL;
- *value = NULL;
+ break;
+ } /* while (42) */
+ } /* for (sending_sockets) */
+} /* void network_send_buffer */
- if ((fd = network_get_listen_socket ()) < 0)
- return (-1);
+static int add_to_buffer (char *buffer, int buffer_size,
+ value_list_t *vl_def, char *type_def,
+ const data_set_t *ds, const value_list_t *vl)
+{
+ char *buffer_orig = buffer;
- addrlen = sizeof (addr);
- if (recvfrom (fd, buffer, BUFF_SIZE, 0, (struct sockaddr *) &addr, &addrlen) == -1)
+ if (strcmp (vl_def->host, vl->host) != 0)
{
- syslog (LOG_ERR, "recvfrom: %s", strerror (errno));
- return (-1);
+ if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
+ vl->host, strlen (vl->host)) != 0)
+ return (-1);
+ strcpy (vl_def->host, vl->host);
}
- if ((*host = (char *) malloc (BUFF_SIZE)) == NULL)
+ if (vl_def->time != vl->time)
{
- syslog (LOG_EMERG, "malloc: %s", strerror (errno));
- return (-1);
+ if (write_part_number (&buffer, &buffer_size, TYPE_TIME,
+ (uint64_t) vl->time))
+ return (-1);
+ vl_def->time = vl->time;
}
- status = getnameinfo ((struct sockaddr *) &addr, addrlen,
- *host, BUFF_SIZE, NULL, 0, 0);
- if (status != 0)
+ if (vl_def->interval != vl->interval)
{
- free (*host); *host = NULL;
- syslog (LOG_ERR, "getnameinfo: %s",
- status == EAI_SYSTEM ? strerror (errno) : gai_strerror (status));
- return (-1);
+ if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL,
+ (uint64_t) vl->interval))
+ return (-1);
+ vl_def->interval = vl->interval;
}
- if (strsplit (buffer, fields, 4) != 3)
+ if (strcmp (vl_def->plugin, vl->plugin) != 0)
{
- syslog (LOG_WARNING, "Invalid message from `%s'", *host);
- free (*host); *host = NULL;
- return (-1);
+ if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
+ vl->plugin, strlen (vl->plugin)) != 0)
+ return (-1);
+ strcpy (vl_def->plugin, vl->plugin);
}
- if ((*type = strdup (fields[0])) == NULL)
+ if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
{
- syslog (LOG_EMERG, "strdup: %s", strerror (errno));
- free (*host); *host = NULL;
- return (-1);
+ if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
+ vl->plugin_instance,
+ strlen (vl->plugin_instance)) != 0)
+ return (-1);
+ strcpy (vl_def->plugin_instance, vl->plugin_instance);
}
- if ((*inst = strdup (fields[1])) == NULL)
+ if (strcmp (type_def, ds->type) != 0)
{
- syslog (LOG_EMERG, "strdup: %s", strerror (errno));
- free (*host); *host = NULL;
- free (*type); *type = NULL;
- return (-1);
+ if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
+ ds->type, strlen (ds->type)) != 0)
+ return (-1);
+ strcpy (type_def, ds->type);
}
- if ((*value = strdup (fields[2])) == NULL)
+ if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
{
- syslog (LOG_EMERG, "strdup: %s", strerror (errno));
- free (*host); *host = NULL;
- free (*type); *type = NULL;
- free (*inst); *inst = NULL;
- return (-1);
+ if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
+ vl->type_instance,
+ strlen (vl->type_instance)) != 0)
+ return (-1);
+ strcpy (vl_def->type_instance, vl->type_instance);
}
+
+ if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
+ return (-1);
- DBG ("host = %s, type = %s, inst = %s, value = %s",
- *host, *type, *inst, *value);
+ return (buffer - buffer_orig);
+} /* int add_to_buffer */
- return (0);
+static void flush_buffer (void)
+{
+ DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
+ send_buffer_fill);
+
+ network_send_buffer (send_buffer, send_buffer_fill);
+ send_buffer_ptr = send_buffer;
+ send_buffer_fill = 0;
+ memset (&send_buffer_vl, '\0', sizeof (send_buffer_vl));
+ memset (send_buffer_type, '\0', sizeof (send_buffer_type));
}
-int network_send (char *type, char *inst, char *value)
+static int network_write (const data_set_t *ds, const value_list_t *vl)
{
- char buf[BUFF_SIZE];
- int buflen;
+ int status;
- sockent_t *se;
+ /* If the value is already in the cache, we have received it via the
+ * network. We write it again if forwarding is activated. It's then in
+ * the cache and should we receive it again we will ignore it. */
+ status = cache_check (ds->type, vl);
+ if ((network_config_forward == 0)
+ && (status != 0))
+ return (0);
- int ret;
- int status;
+ pthread_mutex_lock (&send_buffer_lock);
- DBG ("type = %s, inst = %s, value = %s", type, inst, value);
+ status = add_to_buffer (send_buffer_ptr,
+ sizeof (send_buffer) - send_buffer_fill,
+ &send_buffer_vl, send_buffer_type,
+ ds, vl);
+ if (status >= 0)
+ {
+ /* status == bytes added to the buffer */
+ send_buffer_fill += status;
+ send_buffer_ptr += status;
+ }
+ else
+ {
+ flush_buffer ();
- assert (operating_mode == MODE_CLIENT);
+ status = add_to_buffer (send_buffer_ptr,
+ sizeof (send_buffer) - send_buffer_fill,
+ &send_buffer_vl, send_buffer_type,
+ ds, vl);
- buflen = snprintf (buf, BUFF_SIZE, "%s %s %s", type, inst, value);
- if ((buflen >= BUFF_SIZE) || (buflen < 1))
+ if (status >= 0)
+ {
+ send_buffer_fill += status;
+ send_buffer_ptr += status;
+ }
+ }
+
+ if (status < 0)
+ {
+ ERROR ("network plugin: Unable to append to the "
+ "buffer for some weird reason");
+ }
+ else if ((sizeof (send_buffer) - send_buffer_fill) < 15)
+ {
+ flush_buffer ();
+ }
+
+ pthread_mutex_unlock (&send_buffer_lock);
+
+ return ((status < 0) ? -1 : 0);
+} /* int network_write */
+
+static int network_config (const char *key, const char *val)
+{
+ char *node;
+ char *service;
+
+ char *fields[3];
+ int fields_num;
+
+ if ((strcasecmp ("Listen", key) == 0)
+ || (strcasecmp ("Server", key) == 0))
+ {
+ char *val_cpy = strdup (val);
+ if (val_cpy == NULL)
+ return (1);
+
+ service = NET_DEFAULT_PORT;
+ fields_num = strsplit (val_cpy, fields, 3);
+ if ((fields_num != 1)
+ && (fields_num != 2))
+ return (1);
+ else if (fields_num == 2)
+ {
+ if ((service = strchr (fields[1], '.')) != NULL)
+ *service = '\0';
+ service = fields[1];
+ }
+ node = fields[0];
+
+ if (strcasecmp ("Listen", key) == 0)
+ network_add_listen_socket (node, service);
+ else
+ network_add_sending_socket (node, service);
+ }
+ else if (strcasecmp ("TimeToLive", key) == 0)
+ {
+ int tmp = atoi (val);
+ if ((tmp > 0) && (tmp < 256))
+ network_config_ttl = tmp;
+ else
+ return (1);
+ }
+ else if (strcasecmp ("Forward", key) == 0)
+ {
+ if ((strcasecmp ("true", val) == 0)
+ || (strcasecmp ("yes", val) == 0)
+ || (strcasecmp ("on", val) == 0))
+ network_config_forward = 1;
+ else
+ network_config_forward = 0;
+ }
+ else if (strcasecmp ("CacheFlush", key) == 0)
+ {
+ int tmp = atoi (val);
+ if (tmp > 0)
+ cache_flush_interval = tmp;
+ else return (1);
+ }
+ else
{
- syslog (LOG_WARNING, "network_send: snprintf failed..");
return (-1);
}
- buf[buflen] = '\0';
- buflen++;
+ return (0);
+} /* int network_config */
- if (socklist_head == NULL)
- network_connect_default ();
+static int network_shutdown (void)
+{
+ listen_loop++;
- ret = 0;
- for (se = socklist_head; se != NULL; se = se->next)
+ if (listen_thread != (pthread_t) 0)
{
- if (se->mode != operating_mode)
- continue;
+ pthread_kill (listen_thread, SIGTERM);
+ pthread_join (listen_thread, NULL /* no return value */);
+ listen_thread = (pthread_t) 0;
+ }
- while (1)
- {
- status = sendto (se->fd, buf, buflen, 0,
- (struct sockaddr *) se->addr, se->addrlen);
+ if (send_buffer_fill > 0)
+ flush_buffer ();
- if (status == -1)
- {
- if (errno == EINTR)
- {
- DBG ("sendto was interrupted");
- continue;
- }
- else
- {
- syslog (LOG_ERR, "sendto: %s", strerror (errno));
- ret = -1;
- break;
- }
- }
- else if (ret >= 0)
- ret++;
- break;
+ if (cache_tree != NULL)
+ {
+ void *key;
+ void *value;
+
+ while (c_avl_pick (cache_tree, &key, &value) == 0)
+ {
+ sfree (key);
+ sfree (value);
}
+ c_avl_destroy (cache_tree);
+ cache_tree = NULL;
}
- if (ret == 0)
- syslog (LOG_WARNING, "Message wasn't sent to anybody..");
+ /* TODO: Close `sending_sockets' */
- return (ret);
-}
+ plugin_unregister_config ("network");
+ plugin_unregister_init ("network");
+ plugin_unregister_write ("network");
+ plugin_unregister_shutdown ("network");
+
+ return (0);
+} /* int network_shutdown */
+
+static int network_init (void)
+{
+ plugin_register_shutdown ("network", network_shutdown);
+
+ send_buffer_ptr = send_buffer;
+ send_buffer_fill = 0;
+ memset (&send_buffer_vl, '\0', sizeof (send_buffer_vl));
+ memset (send_buffer_type, '\0', sizeof (send_buffer_type));
+
+ cache_tree = c_avl_create ((int (*) (const void *, const void *)) strcmp);
+ cache_flush_last = time (NULL);
+
+ /* setup socket(s) and so on */
+ if (sending_sockets != NULL)
+ plugin_register_write ("network", network_write);
+
+ if ((listen_sockets_num != 0) && (listen_thread == 0))
+ {
+ int status;
+
+ status = pthread_create (&listen_thread, NULL /* no attributes */,
+ receive_thread, NULL /* no argument */);
+
+ if (status != 0)
+ {
+ char errbuf[1024];
+ ERROR ("network: pthread_create failed: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
+ }
+ }
+ return (0);
+} /* int network_init */
+
+void module_register (void)
+{
+ plugin_register_config ("network", network_config,
+ config_keys, config_keys_num);
+ plugin_register_init ("network", network_init);
+} /* void module_register */
projects / collectd.git / blobdiff