![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
diff --git a/src/tcpconns.c b/src/tcpconns.c
--- /dev/null
+++ b/src/tcpconns.c
@@ -0,0 +1,1095 @@
+/**
+ * collectd - src/tcpconns.c
+ * Copyright (C) 2007,2008 Florian octo Forster
+ * Copyright (C) 2008 Michael Stapelberg
+ *
+ * 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; 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
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Author:
+ * Florian octo Forster <octo at collectd.org>
+ * Michael Stapelberg <michael+git at stapelberg.de>
+ **/
+
+/**
+ * Code within `HAVE_LIBKVM_NLIST' blocks is provided under the following
+ * license:
+ *
+ * $collectd: parts of tcpconns.c, 2008/08/08 03:48:30 Michael Stapelberg $
+ * $OpenBSD: inet.c,v 1.100 2007/06/19 05:28:30 ray Exp $
+ * $NetBSD: inet.c,v 1.14 1995/10/03 21:42:37 thorpej Exp $
+ *
+ * Copyright (c) 1983, 1988, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+
+#if defined(__OpenBSD__) || defined(__NetBSD__)
+#undef HAVE_SYSCTLBYNAME /* force HAVE_LIBKVM_NLIST path */
+#endif
+
+#if !KERNEL_LINUX && !HAVE_SYSCTLBYNAME && !HAVE_LIBKVM_NLIST && !KERNEL_AIX
+# error "No applicable input method."
+#endif
+
+#if KERNEL_LINUX
+# include <asm/types.h>
+/* sys/socket.h is necessary to compile when using netlink on older systems. */
+# include <sys/socket.h>
+# include <linux/netlink.h>
+#if HAVE_LINUX_INET_DIAG_H
+# include <linux/inet_diag.h>
+#endif
+# include <sys/socket.h>
+# include <arpa/inet.h>
+/* #endif KERNEL_LINUX */
+
+#elif HAVE_SYSCTLBYNAME
+# include <sys/socketvar.h>
+# include <sys/sysctl.h>
+
+/* Some includes needed for compiling on FreeBSD */
+#include <sys/time.h>
+#if HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#if HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif
+#if HAVE_NET_IF_H
+# include <net/if.h>
+#endif
+
+# include <net/route.h>
+# include <netinet/in.h>
+# include <netinet/in_systm.h>
+# include <netinet/ip.h>
+# include <netinet/ip6.h>
+# include <netinet/in_pcb.h>
+# include <netinet/ip_var.h>
+# include <netinet/tcp.h>
+# include <netinet/tcpip.h>
+# include <netinet/tcp_seq.h>
+# include <netinet/tcp_var.h>
+/* #endif HAVE_SYSCTLBYNAME */
+
+/* This is for OpenBSD and NetBSD. */
+#elif HAVE_LIBKVM_NLIST
+# include <sys/queue.h>
+# include <sys/socket.h>
+# include <net/route.h>
+# include <netinet/in.h>
+# include <netinet/in_systm.h>
+# include <netinet/ip.h>
+# include <netinet/ip_var.h>
+# include <netinet/in_pcb.h>
+# include <netinet/tcp.h>
+# include <netinet/tcp_timer.h>
+# include <netinet/tcp_var.h>
+# include <netdb.h>
+# include <arpa/inet.h>
+# if !defined(HAVE_BSD_NLIST_H) || !HAVE_BSD_NLIST_H
+# include <nlist.h>
+# else /* HAVE_BSD_NLIST_H */
+# include <bsd/nlist.h>
+# endif
+# include <kvm.h>
+/* #endif HAVE_LIBKVM_NLIST */
+
+#elif KERNEL_AIX
+# include <arpa/inet.h>
+# include <sys/socketvar.h>
+#endif /* KERNEL_AIX */
+
+#if KERNEL_LINUX
+#if HAVE_STRUCT_LINUX_INET_DIAG_REQ
+struct nlreq {
+ struct nlmsghdr nlh;
+ struct inet_diag_req r;
+};
+#endif
+
+static const char *tcp_state[] =
+{
+ "", /* 0 */
+ "ESTABLISHED",
+ "SYN_SENT",
+ "SYN_RECV",
+ "FIN_WAIT1",
+ "FIN_WAIT2",
+ "TIME_WAIT",
+ "CLOSED",
+ "CLOSE_WAIT",
+ "LAST_ACK",
+ "LISTEN", /* 10 */
+ "CLOSING"
+};
+
+# define TCP_STATE_LISTEN 10
+# define TCP_STATE_MIN 1
+# define TCP_STATE_MAX 11
+/* #endif KERNEL_LINUX */
+
+#elif HAVE_SYSCTLBYNAME
+static const char *tcp_state[] =
+{
+ "CLOSED",
+ "LISTEN",
+ "SYN_SENT",
+ "SYN_RECV",
+ "ESTABLISHED",
+ "CLOSE_WAIT",
+ "FIN_WAIT1",
+ "CLOSING",
+ "LAST_ACK",
+ "FIN_WAIT2",
+ "TIME_WAIT"
+};
+
+# define TCP_STATE_LISTEN 1
+# define TCP_STATE_MIN 0
+# define TCP_STATE_MAX 10
+/* #endif HAVE_SYSCTLBYNAME */
+
+#elif HAVE_LIBKVM_NLIST
+static const char *tcp_state[] =
+{
+ "CLOSED",
+ "LISTEN",
+ "SYN_SENT",
+ "SYN_RECV",
+ "ESTABLISHED",
+ "CLOSE_WAIT",
+ "FIN_WAIT1",
+ "CLOSING",
+ "LAST_ACK",
+ "FIN_WAIT2",
+ "TIME_WAIT"
+};
+
+static kvm_t *kvmd;
+static u_long inpcbtable_off = 0;
+struct inpcbtable *inpcbtable_ptr = NULL;
+
+# define TCP_STATE_LISTEN 1
+# define TCP_STATE_MIN 1
+# define TCP_STATE_MAX 10
+/* #endif HAVE_LIBKVM_NLIST */
+
+#elif KERNEL_AIX
+static const char *tcp_state[] =
+{
+ "CLOSED",
+ "LISTEN",
+ "SYN_SENT",
+ "SYN_RECV",
+ "ESTABLISHED",
+ "CLOSE_WAIT",
+ "FIN_WAIT1",
+ "CLOSING",
+ "LAST_ACK",
+ "FIN_WAIT2",
+ "TIME_WAIT"
+};
+
+# define TCP_STATE_LISTEN 1
+# define TCP_STATE_MIN 0
+# define TCP_STATE_MAX 10
+
+struct netinfo_conn {
+ uint32_t unknow1[2];
+ uint16_t dstport;
+ uint16_t unknow2;
+ struct in6_addr dstaddr;
+ uint16_t srcport;
+ uint16_t unknow3;
+ struct in6_addr srcaddr;
+ uint32_t unknow4[36];
+ uint16_t tcp_state;
+ uint16_t unknow5[7];
+};
+
+struct netinfo_header {
+ unsigned int proto;
+ unsigned int size;
+};
+
+# define NETINFO_TCP 3
+extern int netinfo (int proto, void *data, int *size, int n);
+#endif /* KERNEL_AIX */
+
+#define PORT_COLLECT_LOCAL 0x01
+#define PORT_COLLECT_REMOTE 0x02
+#define PORT_IS_LISTENING 0x04
+
+typedef struct port_entry_s
+{
+ uint16_t port;
+ uint16_t flags;
+ uint32_t count_local[TCP_STATE_MAX + 1];
+ uint32_t count_remote[TCP_STATE_MAX + 1];
+ struct port_entry_s *next;
+} port_entry_t;
+
+static const char *config_keys[] =
+{
+ "ListeningPorts",
+ "LocalPort",
+ "RemotePort",
+ "AllPortsSummary"
+};
+static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
+
+static int port_collect_listening = 0;
+static int port_collect_total = 0;
+static port_entry_t *port_list_head = NULL;
+static uint32_t count_total[TCP_STATE_MAX + 1];
+
+#if KERNEL_LINUX
+#if HAVE_STRUCT_LINUX_INET_DIAG_REQ
+/* This depends on linux inet_diag_req because if this structure is missing,
+ * sequence_number is useless and we get a compilation warning.
+ */
+static uint32_t sequence_number = 0;
+#endif
+
+enum
+{
+ SRC_DUNNO,
+ SRC_NETLINK,
+ SRC_PROC
+} linux_source = SRC_DUNNO;
+#endif
+
+static void conn_prepare_vl (value_list_t *vl, value_t *values)
+{
+ vl->values = values;
+ vl->values_len = 1;
+ sstrncpy (vl->host, hostname_g, sizeof (vl->host));
+ sstrncpy (vl->plugin, "tcpconns", sizeof (vl->plugin));
+ sstrncpy (vl->type, "tcp_connections", sizeof (vl->type));
+}
+
+static void conn_submit_port_entry (port_entry_t *pe)
+{
+ value_t values[1];
+ value_list_t vl = VALUE_LIST_INIT;
+ int i;
+
+ conn_prepare_vl (&vl, values);
+
+ if (((port_collect_listening != 0) && (pe->flags & PORT_IS_LISTENING))
+ || (pe->flags & PORT_COLLECT_LOCAL))
+ {
+ ssnprintf (vl.plugin_instance, sizeof (vl.plugin_instance),
+ "%"PRIu16"-local", pe->port);
+
+ for (i = 1; i <= TCP_STATE_MAX; i++)
+ {
+ vl.values[0].gauge = pe->count_local[i];
+
+ sstrncpy (vl.type_instance, tcp_state[i], sizeof (vl.type_instance));
+
+ plugin_dispatch_values (&vl);
+ }
+ }
+
+ if (pe->flags & PORT_COLLECT_REMOTE)
+ {
+ ssnprintf (vl.plugin_instance, sizeof (vl.plugin_instance),
+ "%"PRIu16"-remote", pe->port);
+
+ for (i = 1; i <= TCP_STATE_MAX; i++)
+ {
+ vl.values[0].gauge = pe->count_remote[i];
+
+ sstrncpy (vl.type_instance, tcp_state[i], sizeof (vl.type_instance));
+
+ plugin_dispatch_values (&vl);
+ }
+ }
+} /* void conn_submit */
+
+static void conn_submit_port_total (void)
+{
+ value_t values[1];
+ value_list_t vl = VALUE_LIST_INIT;
+ int i;
+
+ conn_prepare_vl (&vl, values);
+
+ sstrncpy (vl.plugin_instance, "all", sizeof (vl.plugin_instance));
+
+ for (i = 1; i <= TCP_STATE_MAX; i++)
+ {
+ vl.values[0].gauge = count_total[i];
+
+ sstrncpy (vl.type_instance, tcp_state[i], sizeof (vl.type_instance));
+
+ plugin_dispatch_values (&vl);
+ }
+}
+
+static void conn_submit_all (void)
+{
+ port_entry_t *pe;
+
+ if (port_collect_total)
+ conn_submit_port_total ();
+
+ for (pe = port_list_head; pe != NULL; pe = pe->next)
+ conn_submit_port_entry (pe);
+} /* void conn_submit_all */
+
+static port_entry_t *conn_get_port_entry (uint16_t port, int create)
+{
+ port_entry_t *ret;
+
+ ret = port_list_head;
+ while (ret != NULL)
+ {
+ if (ret->port == port)
+ break;
+ ret = ret->next;
+ }
+
+ if ((ret == NULL) && (create != 0))
+ {
+ ret = (port_entry_t *) malloc (sizeof (port_entry_t));
+ if (ret == NULL)
+ return (NULL);
+ memset (ret, '\0', sizeof (port_entry_t));
+
+ ret->port = port;
+ ret->next = port_list_head;
+ port_list_head = ret;
+ }
+
+ return (ret);
+} /* port_entry_t *conn_get_port_entry */
+
+/* Removes ports that were added automatically due to the `ListeningPorts'
+ * setting but which are no longer listening. */
+static void conn_reset_port_entry (void)
+{
+ port_entry_t *prev = NULL;
+ port_entry_t *pe = port_list_head;
+
+ memset (&count_total, '\0', sizeof(count_total));
+
+ while (pe != NULL)
+ {
+ /* If this entry was created while reading the files (ant not when handling
+ * the configuration) remove it now. */
+ if ((pe->flags & (PORT_COLLECT_LOCAL
+ | PORT_COLLECT_REMOTE
+ | PORT_IS_LISTENING)) == 0)
+ {
+ port_entry_t *next = pe->next;
+
+ DEBUG ("tcpconns plugin: Removing temporary entry "
+ "for listening port %"PRIu16, pe->port);
+
+ if (prev == NULL)
+ port_list_head = next;
+ else
+ prev->next = next;
+
+ sfree (pe);
+ pe = next;
+
+ continue;
+ }
+
+ memset (pe->count_local, '\0', sizeof (pe->count_local));
+ memset (pe->count_remote, '\0', sizeof (pe->count_remote));
+ pe->flags &= ~PORT_IS_LISTENING;
+
+ pe = pe->next;
+ }
+} /* void conn_reset_port_entry */
+
+static int conn_handle_ports (uint16_t port_local, uint16_t port_remote, uint8_t state)
+{
+ port_entry_t *pe = NULL;
+
+ if ((state > TCP_STATE_MAX)
+#if TCP_STATE_MIN > 0
+ || (state < TCP_STATE_MIN)
+#endif
+ )
+ {
+ NOTICE ("tcpconns plugin: Ignoring connection with "
+ "unknown state 0x%02"PRIx8".", state);
+ return (-1);
+ }
+
+ count_total[state]++;
+
+ /* Listening sockets */
+ if ((state == TCP_STATE_LISTEN) && (port_collect_listening != 0))
+ {
+ pe = conn_get_port_entry (port_local, 1 /* create */);
+ if (pe != NULL)
+ pe->flags |= PORT_IS_LISTENING;
+ }
+
+ DEBUG ("tcpconns plugin: Connection %"PRIu16" <-> %"PRIu16" (%s)",
+ port_local, port_remote, tcp_state[state]);
+
+ pe = conn_get_port_entry (port_local, 0 /* no create */);
+ if (pe != NULL)
+ pe->count_local[state]++;
+
+ pe = conn_get_port_entry (port_remote, 0 /* no create */);
+ if (pe != NULL)
+ pe->count_remote[state]++;
+
+ return (0);
+} /* int conn_handle_ports */
+
+#if KERNEL_LINUX
+/* Returns zero on success, less than zero on socket error and greater than
+ * zero on other errors. */
+static int conn_read_netlink (void)
+{
+#if HAVE_STRUCT_LINUX_INET_DIAG_REQ
+ int fd;
+ struct sockaddr_nl nladdr;
+ struct nlreq req;
+ struct msghdr msg;
+ struct iovec iov;
+ struct inet_diag_msg *r;
+ char buf[8192];
+
+ /* If this fails, it's likely a permission problem. We'll fall back to
+ * reading this information from files below. */
+ fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_INET_DIAG);
+ if (fd < 0)
+ {
+ ERROR ("tcpconns plugin: conn_read_netlink: socket(AF_NETLINK, SOCK_RAW, "
+ "NETLINK_INET_DIAG) failed: %s",
+ sstrerror (errno, buf, sizeof (buf)));
+ return (-1);
+ }
+
+ memset(&nladdr, 0, sizeof(nladdr));
+ nladdr.nl_family = AF_NETLINK;
+
+ memset(&req, 0, sizeof(req));
+ req.nlh.nlmsg_len = sizeof(req);
+ req.nlh.nlmsg_type = TCPDIAG_GETSOCK;
+ /* NLM_F_ROOT: return the complete table instead of a single entry.
+ * NLM_F_MATCH: return all entries matching criteria (not implemented)
+ * NLM_F_REQUEST: must be set on all request messages */
+ req.nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST;
+ req.nlh.nlmsg_pid = 0;
+ /* The sequence_number is used to track our messages. Since netlink is not
+ * reliable, we don't want to end up with a corrupt or incomplete old
+ * message in case the system is/was out of memory. */
+ req.nlh.nlmsg_seq = ++sequence_number;
+ req.r.idiag_family = AF_INET;
+ req.r.idiag_states = 0xfff;
+ req.r.idiag_ext = 0;
+
+ memset(&iov, 0, sizeof(iov));
+ iov.iov_base = &req;
+ iov.iov_len = sizeof(req);
+
+ memset(&msg, 0, sizeof(msg));
+ msg.msg_name = (void*)&nladdr;
+ msg.msg_namelen = sizeof(nladdr);
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+
+ if (sendmsg (fd, &msg, 0) < 0)
+ {
+ ERROR ("tcpconns plugin: conn_read_netlink: sendmsg(2) failed: %s",
+ sstrerror (errno, buf, sizeof (buf)));
+ close (fd);
+ return (-1);
+ }
+
+ iov.iov_base = buf;
+ iov.iov_len = sizeof(buf);
+
+ while (1)
+ {
+ int status;
+ struct nlmsghdr *h;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.msg_name = (void*)&nladdr;
+ msg.msg_namelen = sizeof(nladdr);
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+
+ status = recvmsg(fd, (void *) &msg, /* flags = */ 0);
+ if (status < 0)
+ {
+ if ((errno == EINTR) || (errno == EAGAIN))
+ continue;
+
+ ERROR ("tcpconns plugin: conn_read_netlink: recvmsg(2) failed: %s",
+ sstrerror (errno, buf, sizeof (buf)));
+ close (fd);
+ return (-1);
+ }
+ else if (status == 0)
+ {
+ close (fd);
+ DEBUG ("tcpconns plugin: conn_read_netlink: Unexpected zero-sized "
+ "reply from netlink socket.");
+ return (0);
+ }
+
+ h = (struct nlmsghdr*)buf;
+ while (NLMSG_OK(h, status))
+ {
+ if (h->nlmsg_seq != sequence_number)
+ {
+ h = NLMSG_NEXT(h, status);
+ continue;
+ }
+
+ if (h->nlmsg_type == NLMSG_DONE)
+ {
+ close (fd);
+ return (0);
+ }
+ else if (h->nlmsg_type == NLMSG_ERROR)
+ {
+ struct nlmsgerr *msg_error;
+
+ msg_error = NLMSG_DATA(h);
+ WARNING ("tcpconns plugin: conn_read_netlink: Received error %i.",
+ msg_error->error);
+
+ close (fd);
+ return (1);
+ }
+
+ r = NLMSG_DATA(h);
+
+ /* This code does not (need to) distinguish between IPv4 and IPv6. */
+ conn_handle_ports (ntohs(r->id.idiag_sport),
+ ntohs(r->id.idiag_dport),
+ r->idiag_state);
+
+ h = NLMSG_NEXT(h, status);
+ } /* while (NLMSG_OK) */
+ } /* while (1) */
+
+ /* Not reached because the while() loop above handles the exit condition. */
+ return (0);
+#else
+ return (1);
+#endif /* HAVE_STRUCT_LINUX_INET_DIAG_REQ */
+} /* int conn_read_netlink */
+
+static int conn_handle_line (char *buffer)
+{
+ char *fields[32];
+ int fields_len;
+
+ char *endptr;
+
+ char *port_local_str;
+ char *port_remote_str;
+ uint16_t port_local;
+ uint16_t port_remote;
+
+ uint8_t state;
+
+ int buffer_len = strlen (buffer);
+
+ while ((buffer_len > 0) && (buffer[buffer_len - 1] < 32))
+ buffer[--buffer_len] = '\0';
+ if (buffer_len <= 0)
+ return (-1);
+
+ fields_len = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
+ if (fields_len < 12)
+ {
+ DEBUG ("tcpconns plugin: Got %i fields, expected at least 12.", fields_len);
+ return (-1);
+ }
+
+ port_local_str = strchr (fields[1], ':');
+ port_remote_str = strchr (fields[2], ':');
+
+ if ((port_local_str == NULL) || (port_remote_str == NULL))
+ return (-1);
+ port_local_str++;
+ port_remote_str++;
+ if ((*port_local_str == '\0') || (*port_remote_str == '\0'))
+ return (-1);
+
+ endptr = NULL;
+ port_local = (uint16_t) strtol (port_local_str, &endptr, 16);
+ if ((endptr == NULL) || (*endptr != '\0'))
+ return (-1);
+
+ endptr = NULL;
+ port_remote = (uint16_t) strtol (port_remote_str, &endptr, 16);
+ if ((endptr == NULL) || (*endptr != '\0'))
+ return (-1);
+
+ endptr = NULL;
+ state = (uint8_t) strtol (fields[3], &endptr, 16);
+ if ((endptr == NULL) || (*endptr != '\0'))
+ return (-1);
+
+ return (conn_handle_ports (port_local, port_remote, state));
+} /* int conn_handle_line */
+
+static int conn_read_file (const char *file)
+{
+ FILE *fh;
+ char buffer[1024];
+
+ fh = fopen (file, "r");
+ if (fh == NULL)
+ return (-1);
+
+ while (fgets (buffer, sizeof (buffer), fh) != NULL)
+ {
+ conn_handle_line (buffer);
+ } /* while (fgets) */
+
+ fclose (fh);
+
+ return (0);
+} /* int conn_read_file */
+/* #endif KERNEL_LINUX */
+
+#elif HAVE_SYSCTLBYNAME
+/* #endif HAVE_SYSCTLBYNAME */
+
+#elif HAVE_LIBKVM_NLIST
+#endif /* HAVE_LIBKVM_NLIST */
+
+static int conn_config (const char *key, const char *value)
+{
+ if (strcasecmp (key, "ListeningPorts") == 0)
+ {
+ if (IS_TRUE (value))
+ port_collect_listening = 1;
+ else
+ port_collect_listening = 0;
+ }
+ else if ((strcasecmp (key, "LocalPort") == 0)
+ || (strcasecmp (key, "RemotePort") == 0))
+ {
+ port_entry_t *pe;
+ int port = atoi (value);
+
+ if ((port < 1) || (port > 65535))
+ {
+ ERROR ("tcpconns plugin: Invalid port: %i", port);
+ return (1);
+ }
+
+ pe = conn_get_port_entry ((uint16_t) port, 1 /* create */);
+ if (pe == NULL)
+ {
+ ERROR ("tcpconns plugin: conn_get_port_entry failed.");
+ return (1);
+ }
+
+ if (strcasecmp (key, "LocalPort") == 0)
+ pe->flags |= PORT_COLLECT_LOCAL;
+ else
+ pe->flags |= PORT_COLLECT_REMOTE;
+ }
+ else if (strcasecmp (key, "AllPortsSummary") == 0)
+ {
+ if (IS_TRUE (value))
+ port_collect_total = 1;
+ else
+ port_collect_total = 0;
+ }
+ else
+ {
+ return (-1);
+ }
+
+ return (0);
+} /* int conn_config */
+
+#if KERNEL_LINUX
+static int conn_init (void)
+{
+ if (port_collect_total == 0 && port_list_head == NULL)
+ port_collect_listening = 1;
+
+ return (0);
+} /* int conn_init */
+
+static int conn_read (void)
+{
+ int status;
+
+ conn_reset_port_entry ();
+
+ if (linux_source == SRC_NETLINK)
+ {
+ status = conn_read_netlink ();
+ }
+ else if (linux_source == SRC_PROC)
+ {
+ int errors_num = 0;
+
+ if (conn_read_file ("/proc/net/tcp") != 0)
+ errors_num++;
+ if (conn_read_file ("/proc/net/tcp6") != 0)
+ errors_num++;
+
+ if (errors_num < 2)
+ status = 0;
+ else
+ status = ENOENT;
+ }
+ else /* if (linux_source == SRC_DUNNO) */
+ {
+ /* Try to use netlink for getting this data, it is _much_ faster on systems
+ * with a large amount of connections. */
+ status = conn_read_netlink ();
+ if (status == 0)
+ {
+ INFO ("tcpconns plugin: Reading from netlink succeeded. "
+ "Will use the netlink method from now on.");
+ linux_source = SRC_NETLINK;
+ }
+ else
+ {
+ INFO ("tcpconns plugin: Reading from netlink failed. "
+ "Will read from /proc from now on.");
+ linux_source = SRC_PROC;
+
+ /* return success here to avoid the "plugin failed" message. */
+ return (0);
+ }
+ }
+
+ if (status == 0)
+ conn_submit_all ();
+ else
+ return (status);
+
+ return (0);
+} /* int conn_read */
+/* #endif KERNEL_LINUX */
+
+#elif HAVE_SYSCTLBYNAME
+static int conn_read (void)
+{
+ int status;
+ char *buffer;
+ size_t buffer_len;;
+
+ struct xinpgen *in_orig;
+ struct xinpgen *in_ptr;
+
+ conn_reset_port_entry ();
+
+ buffer_len = 0;
+ status = sysctlbyname ("net.inet.tcp.pcblist", NULL, &buffer_len, 0, 0);
+ if (status < 0)
+ {
+ ERROR ("tcpconns plugin: sysctlbyname failed.");
+ return (-1);
+ }
+
+ buffer = (char *) malloc (buffer_len);
+ if (buffer == NULL)
+ {
+ ERROR ("tcpconns plugin: malloc failed.");
+ return (-1);
+ }
+
+ status = sysctlbyname ("net.inet.tcp.pcblist", buffer, &buffer_len, 0, 0);
+ if (status < 0)
+ {
+ ERROR ("tcpconns plugin: sysctlbyname failed.");
+ sfree (buffer);
+ return (-1);
+ }
+
+ if (buffer_len <= sizeof (struct xinpgen))
+ {
+ ERROR ("tcpconns plugin: (buffer_len <= sizeof (struct xinpgen))");
+ sfree (buffer);
+ return (-1);
+ }
+
+ in_orig = (struct xinpgen *) buffer;
+ for (in_ptr = (struct xinpgen *) (((char *) in_orig) + in_orig->xig_len);
+ in_ptr->xig_len > sizeof (struct xinpgen);
+ in_ptr = (struct xinpgen *) (((char *) in_ptr) + in_ptr->xig_len))
+ {
+ struct tcpcb *tp = &((struct xtcpcb *) in_ptr)->xt_tp;
+ struct inpcb *inp = &((struct xtcpcb *) in_ptr)->xt_inp;
+ struct xsocket *so = &((struct xtcpcb *) in_ptr)->xt_socket;
+
+ /* Ignore non-TCP sockets */
+ if (so->xso_protocol != IPPROTO_TCP)
+ continue;
+
+ /* Ignore PCBs which were freed during copyout. */
+ if (inp->inp_gencnt > in_orig->xig_gen)
+ continue;
+
+ if (((inp->inp_vflag & INP_IPV4) == 0)
+ && ((inp->inp_vflag & INP_IPV6) == 0))
+ continue;
+
+ conn_handle_ports (ntohs (inp->inp_lport), ntohs (inp->inp_fport),
+ tp->t_state);
+ } /* for (in_ptr) */
+
+ in_orig = NULL;
+ in_ptr = NULL;
+ sfree (buffer);
+
+ conn_submit_all ();
+
+ return (0);
+} /* int conn_read */
+/* #endif HAVE_SYSCTLBYNAME */
+
+#elif HAVE_LIBKVM_NLIST
+static int kread (u_long addr, void *buf, int size)
+{
+ int status;
+
+ status = kvm_read (kvmd, addr, buf, size);
+ if (status != size)
+ {
+ ERROR ("tcpconns plugin: kvm_read failed (got %i, expected %i): %s\n",
+ status, size, kvm_geterr (kvmd));
+ return (-1);
+ }
+ return (0);
+} /* int kread */
+
+static int conn_init (void)
+{
+ char buf[_POSIX2_LINE_MAX];
+ struct nlist nl[] =
+ {
+#define N_TCBTABLE 0
+ { "_tcbtable" },
+ { "" }
+ };
+ int status;
+
+ kvmd = kvm_openfiles (NULL, NULL, NULL, O_RDONLY, buf);
+ if (kvmd == NULL)
+ {
+ ERROR ("tcpconns plugin: kvm_openfiles failed: %s", buf);
+ return (-1);
+ }
+
+ status = kvm_nlist (kvmd, nl);
+ if (status < 0)
+ {
+ ERROR ("tcpconns plugin: kvm_nlist failed with status %i.", status);
+ return (-1);
+ }
+
+ if (nl[N_TCBTABLE].n_type == 0)
+ {
+ ERROR ("tcpconns plugin: Error looking up kernel's namelist: "
+ "N_TCBTABLE is invalid.");
+ return (-1);
+ }
+
+ inpcbtable_off = (u_long) nl[N_TCBTABLE].n_value;
+ inpcbtable_ptr = (struct inpcbtable *) nl[N_TCBTABLE].n_value;
+
+ return (0);
+} /* int conn_init */
+
+static int conn_read (void)
+{
+ struct inpcbtable table;
+#if !defined(__OpenBSD__) && (defined(__NetBSD_Version__) && __NetBSD_Version__ <= 699002700)
+ struct inpcb *head;
+#endif
+ struct inpcb *next;
+ struct inpcb inpcb;
+ struct tcpcb tcpcb;
+ int status;
+
+ conn_reset_port_entry ();
+
+ /* Read the pcbtable from the kernel */
+ status = kread (inpcbtable_off, &table, sizeof (table));
+ if (status != 0)
+ return (-1);
+
+#if defined(__OpenBSD__) || (defined(__NetBSD_Version__) && __NetBSD_Version__ > 699002700)
+ /* inpt_queue is a TAILQ on OpenBSD */
+ /* Get the first pcb */
+ next = (struct inpcb *)TAILQ_FIRST (&table.inpt_queue);
+ while (next)
+#else
+ /* Get the `head' pcb */
+ head = (struct inpcb *) &(inpcbtable_ptr->inpt_queue);
+ /* Get the first pcb */
+ next = (struct inpcb *)CIRCLEQ_FIRST (&table.inpt_queue);
+
+ while (next != head)
+#endif
+ {
+ /* Read the pcb pointed to by `next' into `inpcb' */
+ kread ((u_long) next, &inpcb, sizeof (inpcb));
+
+ /* Advance `next' */
+#if defined(__OpenBSD__) || (defined(__NetBSD_Version__) && __NetBSD_Version__ > 699002700)
+ /* inpt_queue is a TAILQ on OpenBSD */
+ next = (struct inpcb *)TAILQ_NEXT (&inpcb, inp_queue);
+#else
+ next = (struct inpcb *)CIRCLEQ_NEXT (&inpcb, inp_queue);
+#endif
+
+ /* Ignore sockets, that are not connected. */
+#ifdef __NetBSD__
+ if (inpcb.inp_af == AF_INET6)
+ continue; /* XXX see netbsd/src/usr.bin/netstat/inet6.c */
+#else
+ if (!(inpcb.inp_flags & INP_IPV6)
+ && (inet_lnaof(inpcb.inp_laddr) == INADDR_ANY))
+ continue;
+ if ((inpcb.inp_flags & INP_IPV6)
+ && IN6_IS_ADDR_UNSPECIFIED (&inpcb.inp_laddr6))
+ continue;
+#endif
+
+ kread ((u_long) inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb));
+ conn_handle_ports (ntohs(inpcb.inp_lport), ntohs(inpcb.inp_fport), tcpcb.t_state);
+ } /* while (next != head) */
+
+ conn_submit_all ();
+
+ return (0);
+}
+/* #endif HAVE_LIBKVM_NLIST */
+
+#elif KERNEL_AIX
+
+static int conn_read (void)
+{
+ int size;
+ int i;
+ int nconn;
+ void *data;
+ struct netinfo_header *header;
+ struct netinfo_conn *conn;
+
+ conn_reset_port_entry ();
+
+ size = netinfo(NETINFO_TCP, 0, 0, 0);
+ if (size < 0)
+ {
+ ERROR ("tcpconns plugin: netinfo failed return: %i", size);
+ return (-1);
+ }
+
+ if (size == 0)
+ return (0);
+
+ if ((size - sizeof (struct netinfo_header)) % sizeof (struct netinfo_conn))
+ {
+ ERROR ("tcpconns plugin: invalid buffer size");
+ return (-1);
+ }
+
+ data = malloc(size);
+ if (data == NULL)
+ {
+ ERROR ("tcpconns plugin: malloc failed");
+ return (-1);
+ }
+
+ if (netinfo(NETINFO_TCP, data, &size, 0) < 0)
+ {
+ ERROR ("tcpconns plugin: netinfo failed");
+ free(data);
+ return (-1);
+ }
+
+ header = (struct netinfo_header *)data;
+ nconn = header->size;
+ conn = (struct netinfo_conn *)(data + sizeof(struct netinfo_header));
+
+ for (i=0; i < nconn; conn++, i++)
+ {
+ conn_handle_ports (conn->srcport, conn->dstport, conn->tcp_state);
+ }
+
+ free(data);
+
+ conn_submit_all ();
+
+ return (0);
+}
+#endif /* KERNEL_AIX */
+
+void module_register (void)
+{
+ plugin_register_config ("tcpconns", conn_config,
+ config_keys, config_keys_num);
+#if KERNEL_LINUX
+ plugin_register_init ("tcpconns", conn_init);
+#elif HAVE_SYSCTLBYNAME
+ /* no initialization */
+#elif HAVE_LIBKVM_NLIST
+ plugin_register_init ("tcpconns", conn_init);
+#elif KERNEL_AIX
+ /* no initialization */
+#endif
+ plugin_register_read ("tcpconns", conn_read);
+} /* void module_register */
+
+/*
+ * vim: set shiftwidth=2 softtabstop=2 tabstop=8 fdm=marker :
+ */