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commit df3acf469c6e789ef318ddebd274c9969298ef13
Author: Douglas Hubler <dhubler@ezuce.com>
Date: Tue May 8 16:29:29 2012 -0400
reroll patch net-snmp-5.7.1-systemd.patch from koji
diff --git a/README.systemd b/README.systemd
new file mode 100644
index 0000000..f731851
--- /dev/null
+++ b/README.systemd
@@ -0,0 +1,41 @@
+README.systemd
+--------------
+Net-SNMP provides two daemons, which support systemd system manager.
+See http://www.freedesktop.org/wiki/Software/systemd to learn how
+systemd works. Both socket activation and notification is supported by these
+daemons.
+
+To enable systemd support, the sources must be compiled with
+--with-systemd configure option.
+
+snmpd - The SNMP agent
+----------------------
+Socket activation od snmpd daemon is implemented, but it's discouraged.
+The reason is simple - snmpd not only listens and processes SNMP requests
+from network, but also gathers system statistics counters, sends traps and
+communicates with subagents. It even opens few netlink sockets.
+
+In other words, snmpd should run from system start to properly work.
+This can be done in two ways:
+1) either as snmpd service unit with 'Type=notification' and without a socket
+ unit
+2) or as snmpd service unit with 'Type=simple', appropriate socket socket unit
+ and the snmpd service enabled. This way systemd creates the snmpd listening
+ socket early during boot and passes the sockets to snmpd slightly later
+ (but still during machine boot). This way systemd can paralelize start of
+ services, which depend on snmpd. Admins must adjust the socket file manually,
+ depending if the snmpd support AgentX, IPv6, SMUX etc.
+
+snmpd should be started with '-f' command line parameter to disable forking -
+systemd does that for us automatically.
+
+
+snmptrapd - The trap processing daemon
+--------------------------------------
+snmptrapd supports full socket activation and also notification (if needed).
+Both 'Type=simple' (with appropriate socket unit) and 'Type=notify' services
+will work. Again, '-f' parameter should be provided on snmptrapd command line.
+
+If integration with SNMP agent using AgentX protocol is enabled, snmptrapd should
+start during boot and not after first SNMP trap arrives. Same rules as for snmpd
+applies then.
\ No newline at end of file
diff --git a/agent/snmpd.c b/agent/snmpd.c
index b177d5b..4e89e51 100644
--- a/agent/snmpd.c
+++ b/agent/snmpd.c
@@ -164,6 +164,10 @@ typedef long fd_mask;
#endif
+#ifndef NETSNMP_NO_SYSTEMD
+#include <net-snmp/library/sd-daemon.h>
+#endif
+
netsnmp_feature_want(logging_file)
netsnmp_feature_want(logging_stdio)
netsnmp_feature_want(logging_syslog)
@@ -441,18 +445,26 @@ main(int argc, char *argv[])
int agent_mode = -1;
char *pid_file = NULL;
char option_compatability[] = "-Le";
+ int prepared_sockets = 0;
#if HAVE_GETPID
int fd;
FILE *PID;
#endif
#ifndef WIN32
+#ifndef NETSNMP_NO_SYSYSTEMD
+ /* check if systemd has sockets for us and don't close them */
+ prepared_sockets = netsnmp_sd_listen_fds(0);
+#endif /* NETSNMP_NO_SYSYSTEMD */
+
/*
* close all non-standard file descriptors we may have
* inherited from the shell.
*/
- for (i = getdtablesize() - 1; i > 2; --i) {
- (void) close(i);
+ if (!prepared_sockets) {
+ for (i = getdtablesize() - 1; i > 2; --i) {
+ (void) close(i);
+ }
}
#endif /* #WIN32 */
@@ -1100,6 +1112,19 @@ main(int argc, char *argv[])
netsnmp_addrcache_initialise();
/*
+ * Let systemd know we're up.
+ */
+#ifndef NETSNMP_NO_SYSTEMD
+ netsnmp_sd_notify(1, "READY=1\n");
+ if (prepared_sockets)
+ /*
+ * Clear the environment variable, we already processed all the sockets
+ * by now.
+ */
+ netsnmp_sd_listen_fds(1);
+#endif
+
+ /*
* Forever monitor the dest_port for incoming PDUs.
*/
DEBUGMSGTL(("snmpd/main", "We're up. Starting to process data.\n"));
diff --git a/apps/snmptrapd.c b/apps/snmptrapd.c
index 1a52080..4d82260 100644
--- a/apps/snmptrapd.c
+++ b/apps/snmptrapd.c
@@ -125,6 +125,10 @@ SOFTWARE.
#include <net-snmp/net-snmp-features.h>
+#ifndef NETSNMP_NO_SYSTEMD
+#include <net-snmp/library/sd-daemon.h>
+#endif
+
#ifndef BSD4_3
#define BSD4_2
#endif
@@ -655,15 +659,22 @@ main(int argc, char *argv[])
int agentx_subagent = 1;
#endif
netsnmp_trapd_handler *traph;
+ int prepared_sockets = 0;
#ifndef WIN32
+#ifndef NETSNMP_NO_SYSTEMD
+ /* check if systemd has sockets for us and don't close them */
+ prepared_sockets = netsnmp_sd_listen_fds(0);
+#endif
/*
* close all non-standard file descriptors we may have
* inherited from the shell.
*/
- for (i = getdtablesize() - 1; i > 2; --i) {
- (void) close(i);
+ if (!prepared_sockets) {
+ for (i = getdtablesize() - 1; i > 2; --i) {
+ (void) close(i);
+ }
}
#endif /* #WIN32 */
@@ -1311,6 +1322,19 @@ main(int argc, char *argv[])
#endif
#endif
+ /*
+ * Let systemd know we're up.
+ */
+#ifndef NETSNMP_NO_SYSTEMD
+ netsnmp_sd_notify(1, "READY=1\n");
+ if (prepared_sockets)
+ /*
+ * Clear the environment variable, we already processed all the sockets
+ * by now.
+ */
+ netsnmp_sd_listen_fds(1);
+#endif
+
#ifdef WIN32SERVICE
trapd_status = SNMPTRAPD_RUNNING;
#endif
diff --git a/configure b/configure
index b7f1a73..d89371d 100755
--- a/configure
+++ b/configure
@@ -940,6 +940,8 @@ with_kmem_usage
enable_kmem_usage
with_dummy_values
enable_dummy_values
+with_systemd
+enable_systemd
enable_set_support
with_set_support
with_sys_contact
@@ -1853,6 +1855,8 @@ Configuring the agent:
This is technically not compliant with the
SNMP specifications, but was how the agent
operated for versions < 4.0.
+ --with-systemd Provide systemd support. See README.systemd
+ for details.
--with-sys-contact="who@where" Default system contact.
(Default: LOGIN@DOMAINNAME)
--with-sys-location="location" Default system location.
@@ -4382,6 +4386,24 @@ $as_echo "#define NETSNMP_NO_DUMMY_VALUES 1" >>confdefs.h
fi
+
+# Check whether --with-systemd was given.
+if test "${with_systemd+set}" = set; then :
+ withval=$with_systemd;
+fi
+
+ # Check whether --enable-systemd was given.
+if test "${enable_systemd+set}" = set; then :
+ enableval=$enable_systemd; as_fn_error $? "Invalid option. Use --with-systemd/--without-systemd instead" "$LINENO" 5
+fi
+
+# Define unless specifically suppressed (i.e., option defaults to false).
+if test "x$with_systemd" != "xyes"; then
+
+$as_echo "#define NETSNMP_NO_SYSTEMD 1" >>confdefs.h
+
+fi
+
# Check whether --enable-set-support was given.
if test "${enable_set_support+set}" = set; then :
enableval=$enable_set_support;
@@ -17575,6 +17597,14 @@ if test "x$PARTIALTARGETOS" = "xmingw32" -o "x$PARTIALTARGETOS" = "xmingw32msvc"
other_ftobjs_list="$other_ftobjs_list winpipe.ft"
fi
+# Linux systemd
+if test "x$with_systemd" == "xyes"; then
+ other_src_list="$other_src_list sd-daemon.c"
+ other_objs_list="$other_objs_list sd-daemon.o"
+ other_lobjs_list="$other_lobjs_list sd-daemon.lo"
+ other_ftobjs_list="$other_ftobjs_list sd-daemon.ft"
+fi
+
diff --git a/configure.d/config_modules_lib b/configure.d/config_modules_lib
index b6609c1..5849072 100644
--- a/configure.d/config_modules_lib
+++ b/configure.d/config_modules_lib
@@ -53,6 +53,14 @@ if test "x$PARTIALTARGETOS" = "xmingw32" -o "x$PARTIALTARGETOS" = "xmingw32msvc"
other_ftobjs_list="$other_ftobjs_list winpipe.ft"
fi
+# Linux systemd
+if test "x$with_systemd" == "xyes"; then
+ other_src_list="$other_src_list sd-daemon.c"
+ other_objs_list="$other_objs_list sd-daemon.o"
+ other_lobjs_list="$other_lobjs_list sd-daemon.lo"
+ other_ftobjs_list="$other_ftobjs_list sd-daemon.ft"
+fi
+
AC_SUBST(other_src_list)
AC_SUBST(other_objs_list)
AC_SUBST(other_lobjs_list)
diff --git a/configure.d/config_project_with_enable b/configure.d/config_project_with_enable
index 8b46ad2..59d6d5c 100644
--- a/configure.d/config_project_with_enable
+++ b/configure.d/config_project_with_enable
@@ -689,6 +689,15 @@ if test "x$with_dummy_values" != "xyes"; then
data for])
fi
+NETSNMP_ARG_WITH(systemd,
+[ --with-systemd Provide systemd support. See README.systemd
+ for details.])
+# Define unless specifically suppressed (i.e., option defaults to false).
+if test "x$with_systemd" != "xyes"; then
+ AC_DEFINE(NETSNMP_NO_SYSTEMD, 1,
+ [If you don't want to integrate with systemd.])
+fi
+
NETSNMP_ARG_ENABLE(set-support,
[ --disable-set-support Do not allow SNMP set requests.])
if test "x$enable_set_support" = "xno"; then
diff --git a/dist/snmpd.service b/dist/snmpd.service
new file mode 100644
index 0000000..31391e5
--- /dev/null
+++ b/dist/snmpd.service
@@ -0,0 +1,18 @@
+#
+# SNMP agent service file for systemd
+#
+#
+# The service should be enabled, i.e. snmpd should start during machine boot.
+# Socket activation shall not be used. See README.systemd for details.
+
+[Unit]
+Description=Simple Network Management Protocol (SNMP) daemon.
+After=syslog.target network.target
+
+[Service]
+# Type=notify is also supported. It should be set when snmpd.socket is not used.
+Type=simple
+ExecStart=/usr/sbin/snmpd -f
+
+[Install]
+WantedBy=multi-user.target
diff --git a/dist/snmpd.socket b/dist/snmpd.socket
new file mode 100644
index 0000000..7f3a2d9
--- /dev/null
+++ b/dist/snmpd.socket
@@ -0,0 +1,17 @@
+[Unit]
+Description=Socket listening for SNMP and AgentX messages
+
+[Socket]
+ListenDatagram=0.0.0.0:161
+# Uncomment other listening addresses as needed - TCP, UDP6, TCP6.
+# It must match listening addresses/ports defined in snmpd.service
+# or snmpd.conf.
+# ListenStream=0.0.0.0:161
+# ListenDatagram=[::]:161
+# ListenStream=[::]:161
+#
+# Uncomment AgentX socket if snmpd.conf enables AgentX protocol.
+# ListenStream=/var/agentx/master
+
+[Install]
+WantedBy=sockets.target
diff --git a/dist/snmptrapd.service b/dist/snmptrapd.service
new file mode 100644
index 0000000..e88a5b4
--- /dev/null
+++ b/dist/snmptrapd.service
@@ -0,0 +1,16 @@
+#
+# SNMP trap-processing service file for systemd
+#
+
+[Unit]
+Description=Simple Network Management Protocol (SNMP) Trap daemon.
+After=syslog.target network.target
+
+[Service]
+# Type=notify is also supported. It should be set when snmptrapd.socket is not
+# used.
+Type=simple
+ExecStart=/usr/sbin/snmptrapd -f
+
+[Install]
+WantedBy=multi-user.target
diff --git a/dist/snmptrapd.socket b/dist/snmptrapd.socket
new file mode 100644
index 0000000..0fc8a7c
--- /dev/null
+++ b/dist/snmptrapd.socket
@@ -0,0 +1,14 @@
+[Unit]
+Description=Socket listening for SNMP trap messages
+
+[Socket]
+ListenDatagram=0.0.0.0:162
+# Uncomment other listening addresses as needed - TCP, UDP6, TCP6.
+# It must match listening addresses/ports defined in snmptrapd.service
+# or snmptrapd.conf.
+# ListenStream=0.0.0.0:162
+# ListenDatagram=[::]:162
+# ListenStream=[::]:162
+
+[Install]
+WantedBy=sockets.target
diff --git a/include/net-snmp/library/sd-daemon.h b/include/net-snmp/library/sd-daemon.h
new file mode 100644
index 0000000..008cb62
--- /dev/null
+++ b/include/net-snmp/library/sd-daemon.h
@@ -0,0 +1,286 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#ifndef SNMPD_SD_DAEMON_H
+#define SNMPD_SD_DAEMON_H
+
+/***
+ Copyright 2010 Lennart Poettering
+
+ Permission is hereby granted, free of charge, to any person
+ obtaining a copy of this software and associated documentation files
+ (the "Software"), to deal in the Software without restriction,
+ including without limitation the rights to use, copy, modify, merge,
+ publish, distribute, sublicense, and/or sell copies of the Software,
+ and to permit persons to whom the Software is furnished to do so,
+ subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ SOFTWARE.
+***/
+
+#include <sys/types.h>
+#include <inttypes.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ Reference implementation of a few systemd related interfaces for
+ writing daemons. These interfaces are trivial to implement. To
+ simplify porting we provide this reference implementation.
+ Applications are welcome to reimplement the algorithms described
+ here if they do not want to include these two source files.
+
+ The following functionality is provided:
+
+ - Support for logging with log levels on stderr
+ - File descriptor passing for socket-based activation
+ - Daemon startup and status notification
+ - Detection of systemd boots
+
+ You may compile this with -DDISABLE_SYSTEMD to disable systemd
+ support. This makes all those calls NOPs that are directly related to
+ systemd (i.e. only sd_is_xxx() will stay useful).
+
+ Since this is drop-in code we don't want any of our symbols to be
+ exported in any case. Hence we declare hidden visibility for all of
+ them.
+
+ You may find an up-to-date version of these source files online:
+
+ http://cgit.freedesktop.org/systemd/plain/src/sd-daemon.h
+ http://cgit.freedesktop.org/systemd/plain/src/sd-daemon.c
+
+ This should compile on non-Linux systems, too, but with the
+ exception of the sd_is_xxx() calls all functions will become NOPs.
+
+ See sd-daemon(7) for more information.
+*/
+
+#ifndef _sd_printf_attr_
+#if __GNUC__ >= 4
+#define _sd_printf_attr_(a,b) __attribute__ ((format (printf, a, b)))
+#else
+#define _sd_printf_attr_(a,b)
+#endif
+#endif
+
+/*
+ Log levels for usage on stderr:
+
+ fprintf(stderr, SD_NOTICE "Hello World!\n");
+
+ This is similar to printk() usage in the kernel.
+*/
+#define SD_EMERG "<0>" /* system is unusable */
+#define SD_ALERT "<1>" /* action must be taken immediately */
+#define SD_CRIT "<2>" /* critical conditions */
+#define SD_ERR "<3>" /* error conditions */
+#define SD_WARNING "<4>" /* warning conditions */
+#define SD_NOTICE "<5>" /* normal but significant condition */
+#define SD_INFO "<6>" /* informational */
+#define SD_DEBUG "<7>" /* debug-level messages */
+
+/* The first passed file descriptor is fd 3 */
+#define SD_LISTEN_FDS_START 3
+
+/*
+ Returns how many file descriptors have been passed, or a negative
+ errno code on failure. Optionally, removes the $LISTEN_FDS and
+ $LISTEN_PID file descriptors from the environment (recommended, but
+ problematic in threaded environments). If r is the return value of
+ this function you'll find the file descriptors passed as fds
+ SD_LISTEN_FDS_START to SD_LISTEN_FDS_START+r-1. Returns a negative
+ errno style error code on failure. This function call ensures that
+ the FD_CLOEXEC flag is set for the passed file descriptors, to make
+ sure they are not passed on to child processes. If FD_CLOEXEC shall
+ not be set, the caller needs to unset it after this call for all file
+ descriptors that are used.
+
+ See sd_listen_fds(3) for more information.
+*/
+int netsnmp_sd_listen_fds(int unset_environment);
+
+/*
+ Helper call for identifying a passed file descriptor. Returns 1 if
+ the file descriptor is a FIFO in the file system stored under the
+ specified path, 0 otherwise. If path is NULL a path name check will
+ not be done and the call only verifies if the file descriptor
+ refers to a FIFO. Returns a negative errno style error code on
+ failure.
+
+ See sd_is_fifo(3) for more information.
+*/
+int netsnmp_sd_is_fifo(int fd, const char *path);
+
+/*
+ Helper call for identifying a passed file descriptor. Returns 1 if
+ the file descriptor is a special character device on the file
+ system stored under the specified path, 0 otherwise.
+ If path is NULL a path name check will not be done and the call
+ only verifies if the file descriptor refers to a special character.
+ Returns a negative errno style error code on failure.
+
+ See sd_is_special(3) for more information.
+*/
+int netsnmp_sd_is_special(int fd, const char *path);
+
+/*
+ Helper call for identifying a passed file descriptor. Returns 1 if
+ the file descriptor is a socket of the specified family (AF_INET,
+ ...) and type (SOCK_DGRAM, SOCK_STREAM, ...), 0 otherwise. If
+ family is 0 a socket family check will not be done. If type is 0 a
+ socket type check will not be done and the call only verifies if
+ the file descriptor refers to a socket. If listening is > 0 it is
+ verified that the socket is in listening mode. (i.e. listen() has
+ been called) If listening is == 0 it is verified that the socket is
+ not in listening mode. If listening is < 0 no listening mode check
+ is done. Returns a negative errno style error code on failure.
+
+ See sd_is_socket(3) for more information.
+*/
+int netsnmp_sd_is_socket(int fd, int family, int type, int listening);
+
+/*
+ Helper call for identifying a passed file descriptor. Returns 1 if
+ the file descriptor is an Internet socket, of the specified family
+ (either AF_INET or AF_INET6) and the specified type (SOCK_DGRAM,
+ SOCK_STREAM, ...), 0 otherwise. If version is 0 a protocol version
+ check is not done. If type is 0 a socket type check will not be
+ done. If port is 0 a socket port check will not be done. The
+ listening flag is used the same way as in sd_is_socket(). Returns a
+ negative errno style error code on failure.
+
+ See sd_is_socket_inet(3) for more information.
+*/
+int netsnmp_sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port);
+
+/*
+ Helper call for identifying a passed file descriptor. Returns 1 if
+ the file descriptor is an AF_UNIX socket of the specified type
+ (SOCK_DGRAM, SOCK_STREAM, ...) and path, 0 otherwise. If type is 0
+ a socket type check will not be done. If path is NULL a socket path
+ check will not be done. For normal AF_UNIX sockets set length to
+ 0. For abstract namespace sockets set length to the length of the
+ socket name (including the initial 0 byte), and pass the full
+ socket path in path (including the initial 0 byte). The listening
+ flag is used the same way as in sd_is_socket(). Returns a negative
+ errno style error code on failure.
+
+ See sd_is_socket_unix(3) for more information.
+*/
+int netsnmp_sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length);
+
+/*
+ Informs systemd about changed daemon state. This takes a number of
+ newline separated environment-style variable assignments in a
+ string. The following variables are known:
+
+ READY=1 Tells systemd that daemon startup is finished (only
+ relevant for services of Type=notify). The passed
+ argument is a boolean "1" or "0". Since there is
+ little value in signaling non-readiness the only
+ value daemons should send is "READY=1".
+
+ STATUS=... Passes a single-line status string back to systemd
+ that describes the daemon state. This is free-from
+ and can be used for various purposes: general state
+ feedback, fsck-like programs could pass completion
+ percentages and failing programs could pass a human
+ readable error message. Example: "STATUS=Completed
+ 66% of file system check..."
+
+ ERRNO=... If a daemon fails, the errno-style error code,
+ formatted as string. Example: "ERRNO=2" for ENOENT.
+
+ BUSERROR=... If a daemon fails, the D-Bus error-style error
+ code. Example: "BUSERROR=org.freedesktop.DBus.Error.TimedOut"
+
+ MAINPID=... The main pid of a daemon, in case systemd did not
+ fork off the process itself. Example: "MAINPID=4711"
+
+ Daemons can choose to send additional variables. However, it is
+ recommended to prefix variable names not listed above with X_.
+
+ Returns a negative errno-style error code on failure. Returns > 0
+ if systemd could be notified, 0 if it couldn't possibly because
+ systemd is not running.
+
+ Example: When a daemon finished starting up, it could issue this
+ call to notify systemd about it:
+
+ sd_notify(0, "READY=1");
+
+ See sd_notifyf() for more complete examples.
+
+ See sd_notify(3) for more information.
+*/
+int netsnmp_sd_notify(int unset_environment, const char *state);
+
+/*
+ Similar to sd_notify() but takes a format string.
+
+ Example 1: A daemon could send the following after initialization:
+
+ sd_notifyf(0, "READY=1\n"
+ "STATUS=Processing requests...\n"
+ "MAINPID=%lu",
+ (unsigned long) getpid());
+
+ Example 2: A daemon could send the following shortly before
+ exiting, on failure:
+
+ sd_notifyf(0, "STATUS=Failed to start up: %s\n"
+ "ERRNO=%i",
+ strerror(errno),
+ errno);
+
+ See sd_notifyf(3) for more information.
+*/
+int netsnmp_sd_notifyf(int unset_environment, const char *format, ...) _sd_printf_attr_(2,3);
+
+/*
+ Returns > 0 if the system was booted with systemd. Returns < 0 on
+ error. Returns 0 if the system was not booted with systemd. Note
+ that all of the functions above handle non-systemd boots just
+ fine. You should NOT protect them with a call to this function. Also
+ note that this function checks whether the system, not the user
+ session is controlled by systemd. However the functions above work
+ for both user and system services.
+
+ See sd_booted(3) for more information.
+*/
+int netsnmp_sd_booted(void);
+
+/**
+ * Find an socket with given parameters. See man sd_is_socket_inet for
+ * description of the arguments.
+ *
+ * Returns the file descriptor if it is found, 0 otherwise.
+ */
+int netsnmp_sd_find_inet_socket(int family, int type, int listening, int port);
+
+/**
+ * Find an unix socket with given parameters. See man sd_is_socket_unix for
+ * description of the arguments.
+ *
+ * Returns the file descriptor if it is found, 0 otherwise.
+ */
+int
+netsnmp_sd_find_unix_socket(int type, int listening, const char *path);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SNMPD_SD_DAEMON_H */
diff --git a/include/net-snmp/net-snmp-config.h.in b/include/net-snmp/net-snmp-config.h.in
index c464f94..2d3fb6d 100644
--- a/include/net-snmp/net-snmp-config.h.in
+++ b/include/net-snmp/net-snmp-config.h.in
@@ -1398,6 +1398,9 @@
/* If you don't have root access don't exit upon kmem errors */
#undef NETSNMP_NO_ROOT_ACCESS
+/* If you don't want to integrate with systemd. */
+#undef NETSNMP_NO_SYSTEMD
+
/* Define if you want to remove all SET/write access from the code */
#undef NETSNMP_NO_WRITE_SUPPORT
diff --git a/snmplib/sd-daemon.c b/snmplib/sd-daemon.c
new file mode 100644
index 0000000..42dba29
--- /dev/null
+++ b/snmplib/sd-daemon.c
@@ -0,0 +1,532 @@
+/*
+ * Systemd integration parts.
+ *
+ * Most of this file is directly copied from systemd sources.
+ * Changes:
+ * - all functions were renamed to have netsnmp_ prefix
+ * - includes were changed to match Net-SNMP style.
+ * - removed gcc export macros
+ * - removed POSIX message queues
+ */
+
+#include <net-snmp/net-snmp-config.h>
+#include <net-snmp/net-snmp-features.h>
+#include <net-snmp/types.h>
+#include <net-snmp/library/snmp_debug.h>
+
+#ifndef NETSNMP_NO_SYSTEMD
+
+/***
+ Copyright 2010 Lennart Poettering
+
+ Permission is hereby granted, free of charge, to any person
+ obtaining a copy of this software and associated documentation files
+ (the "Software"), to deal in the Software without restriction,
+ including without limitation the rights to use, copy, modify, merge,
+ publish, distribute, sublicense, and/or sell copies of the Software,
+ and to permit persons to whom the Software is furnished to do so,
+ subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ SOFTWARE.
+***/
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/fcntl.h>
+#include <netinet/in.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stddef.h>
+#include <limits.h>
+
+#include <net-snmp/library/sd-daemon.h>
+
+int netsnmp_sd_listen_fds(int unset_environment) {
+
+ int r, fd;
+ const char *e;
+ char *p = NULL;
+ unsigned long l;
+
+ if (!(e = getenv("LISTEN_PID"))) {
+ r = 0;
+ goto finish;
+ }
+
+ errno = 0;
+ l = strtoul(e, &p, 10);
+
+ if (errno != 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ if (!p || *p || l <= 0) {
+ r = -EINVAL;
+ goto finish;
+ }
+
+ /* Is this for us? */
+ if (getpid() != (pid_t) l) {
+ r = 0;
+ goto finish;
+ }
+
+ if (!(e = getenv("LISTEN_FDS"))) {
+ r = 0;
+ goto finish;
+ }
+
+ errno = 0;
+ l = strtoul(e, &p, 10);
+
+ if (errno != 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ if (!p || *p) {
+ r = -EINVAL;
+ goto finish;
+ }
+
+ for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + (int) l; fd ++) {
+ int flags;
+
+ if ((flags = fcntl(fd, F_GETFD)) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ if (flags & FD_CLOEXEC)
+ continue;
+
+ if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) {
+ r = -errno;
+ goto finish;
+ }
+ }
+
+ r = (int) l;
+
+finish:
+ if (unset_environment) {
+ unsetenv("LISTEN_PID");
+ unsetenv("LISTEN_FDS");
+ }
+
+ return r;
+}
+
+int netsnmp_sd_is_fifo(int fd, const char *path) {
+ struct stat st_fd;
+
+ if (fd < 0)
+ return -EINVAL;
+
+ memset(&st_fd, 0, sizeof(st_fd));
+ if (fstat(fd, &st_fd) < 0)
+ return -errno;
+
+ if (!S_ISFIFO(st_fd.st_mode))
+ return 0;
+
+ if (path) {
+ struct stat st_path;
+
+ memset(&st_path, 0, sizeof(st_path));
+ if (stat(path, &st_path) < 0) {
+
+ if (errno == ENOENT || errno == ENOTDIR)
+ return 0;
+
+ return -errno;
+ }
+
+ return
+ st_path.st_dev == st_fd.st_dev &&
+ st_path.st_ino == st_fd.st_ino;
+ }
+
+ return 1;
+}
+
+int netsnmp_sd_is_special(int fd, const char *path) {
+ struct stat st_fd;
+
+ if (fd < 0)
+ return -EINVAL;
+
+ if (fstat(fd, &st_fd) < 0)
+ return -errno;
+
+ if (!S_ISREG(st_fd.st_mode) && !S_ISCHR(st_fd.st_mode))
+ return 0;
+
+ if (path) {
+ struct stat st_path;
+
+ if (stat(path, &st_path) < 0) {
+
+ if (errno == ENOENT || errno == ENOTDIR)
+ return 0;
+
+ return -errno;
+ }
+
+ if (S_ISREG(st_fd.st_mode) && S_ISREG(st_path.st_mode))
+ return
+ st_path.st_dev == st_fd.st_dev &&
+ st_path.st_ino == st_fd.st_ino;
+ else if (S_ISCHR(st_fd.st_mode) && S_ISCHR(st_path.st_mode))
+ return st_path.st_rdev == st_fd.st_rdev;
+ else
+ return 0;
+ }
+
+ return 1;
+}
+
+static int sd_is_socket_internal(int fd, int type, int listening) {
+ struct stat st_fd;
+
+ if (fd < 0 || type < 0)
+ return -EINVAL;
+
+ if (fstat(fd, &st_fd) < 0)
+ return -errno;
+
+ if (!S_ISSOCK(st_fd.st_mode))
+ return 0;
+
+ if (type != 0) {
+ int other_type = 0;
+ socklen_t l = sizeof(other_type);
+
+ if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &other_type, &l) < 0)
+ return -errno;
+
+ if (l != sizeof(other_type))
+ return -EINVAL;
+
+ if (other_type != type)
+ return 0;
+ }
+
+ if (listening >= 0) {
+ int accepting = 0;
+ socklen_t l = sizeof(accepting);
+
+ if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &accepting, &l) < 0)
+ return -errno;
+
+ if (l != sizeof(accepting))
+ return -EINVAL;
+
+ if (!accepting != !listening)
+ return 0;
+ }
+
+ return 1;
+}
+
+union sockaddr_union {
+ struct sockaddr sa;
+ struct sockaddr_in in4;
+ struct sockaddr_in6 in6;
+ struct sockaddr_un un;
+ struct sockaddr_storage storage;
+};
+
+int netsnmp_sd_is_socket(int fd, int family, int type, int listening) {
+ int r;
+
+ if (family < 0)
+ return -EINVAL;
+
+ if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
+ return r;
+
+ if (family > 0) {
+ union sockaddr_union sockaddr;
+ socklen_t l;
+
+ memset(&sockaddr, 0, sizeof(sockaddr));
+ l = sizeof(sockaddr);
+
+ if (getsockname(fd, &sockaddr.sa, &l) < 0)
+ return -errno;
+
+ if (l < sizeof(sa_family_t))
+ return -EINVAL;
+
+ return sockaddr.sa.sa_family == family;
+ }
+
+ return 1;
+}
+
+int netsnmp_sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port) {
+ union sockaddr_union sockaddr;
+ socklen_t l;
+ int r;
+
+ if (family != 0 && family != AF_INET && family != AF_INET6)
+ return -EINVAL;
+
+ if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
+ return r;
+
+ memset(&sockaddr, 0, sizeof(sockaddr));
+ l = sizeof(sockaddr);
+
+ if (getsockname(fd, &sockaddr.sa, &l) < 0)
+ return -errno;
+
+ if (l < sizeof(sa_family_t))
+ return -EINVAL;
+
+ if (sockaddr.sa.sa_family != AF_INET &&
+ sockaddr.sa.sa_family != AF_INET6)
+ return 0;
+
+ if (family > 0)
+ if (sockaddr.sa.sa_family != family)
+ return 0;
+
+ if (port > 0) {
+ if (sockaddr.sa.sa_family == AF_INET) {
+ if (l < sizeof(struct sockaddr_in))
+ return -EINVAL;
+
+ return htons(port) == sockaddr.in4.sin_port;
+ } else {
+ if (l < sizeof(struct sockaddr_in6))
+ return -EINVAL;
+
+ return htons(port) == sockaddr.in6.sin6_port;
+ }
+ }
+
+ return 1;
+}
+
+int netsnmp_sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length) {
+ union sockaddr_union sockaddr;
+ socklen_t l;
+ int r;
+
+ if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
+ return r;
+
+ memset(&sockaddr, 0, sizeof(sockaddr));
+ l = sizeof(sockaddr);
+
+ if (getsockname(fd, &sockaddr.sa, &l) < 0)
+ return -errno;
+
+ if (l < sizeof(sa_family_t))
+ return -EINVAL;
+
+ if (sockaddr.sa.sa_family != AF_UNIX)
+ return 0;
+
+ if (path) {
+ if (length <= 0)
+ length = strlen(path);
+
+ if (length <= 0)
+ /* Unnamed socket */
+ return l == offsetof(struct sockaddr_un, sun_path);
+
+ if (path[0])
+ /* Normal path socket */
+ return
+ (l >= offsetof(struct sockaddr_un, sun_path) + length + 1) &&
+ memcmp(path, sockaddr.un.sun_path, length+1) == 0;
+ else
+ /* Abstract namespace socket */
+ return
+ (l == offsetof(struct sockaddr_un, sun_path) + length) &&
+ memcmp(path, sockaddr.un.sun_path, length) == 0;
+ }
+
+ return 1;
+}
+
+int netsnmp_sd_notify(int unset_environment, const char *state) {
+ int fd = -1, r;
+ struct msghdr msghdr;
+ struct iovec iovec;
+ union sockaddr_union sockaddr;
+ const char *e;
+
+ if (!state) {
+ r = -EINVAL;
+ goto finish;
+ }
+
+ if (!(e = getenv("NOTIFY_SOCKET")))
+ return 0;
+
+ /* Must be an abstract socket, or an absolute path */
+ if ((e[0] != '@' && e[0] != '/') || e[1] == 0) {
+ r = -EINVAL;
+ goto finish;
+ }
+
+ if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ memset(&sockaddr, 0, sizeof(sockaddr));
+ sockaddr.sa.sa_family = AF_UNIX;
+ strncpy(sockaddr.un.sun_path, e, sizeof(sockaddr.un.sun_path));
+
+ if (sockaddr.un.sun_path[0] == '@')
+ sockaddr.un.sun_path[0] = 0;
+
+ memset(&iovec, 0, sizeof(iovec));
+ iovec.iov_base = (char *)state;
+ iovec.iov_len = strlen(state);
+
+ memset(&msghdr, 0, sizeof(msghdr));
+ msghdr.msg_name = &sockaddr;
+ msghdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) + strlen(e);
+
+ if (msghdr.msg_namelen > sizeof(struct sockaddr_un))
+ msghdr.msg_namelen = sizeof(struct sockaddr_un);
+
+ msghdr.msg_iov = &iovec;
+ msghdr.msg_iovlen = 1;
+
+ if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ r = 1;
+
+finish:
+ if (unset_environment)
+ unsetenv("NOTIFY_SOCKET");
+
+ if (fd >= 0)
+ close(fd);
+
+ return r;
+}
+
+int netsnmp_sd_notifyf(int unset_environment, const char *format, ...) {
+ va_list ap;
+ char *p = NULL;
+ int r;
+
+ va_start(ap, format);
+ r = vasprintf(&p, format, ap);
+ va_end(ap);
+
+ if (r < 0 || !p)
+ return -ENOMEM;
+
+ r = netsnmp_sd_notify(unset_environment, p);
+ free(p);
+
+ return r;
+}
+
+int netsnmp_sd_booted(void) {
+ struct stat a, b;
+
+ /* We simply test whether the systemd cgroup hierarchy is
+ * mounted */
+
+ if (lstat("/sys/fs/cgroup", &a) < 0)
+ return 0;
+
+ if (lstat("/sys/fs/cgroup/systemd", &b) < 0)
+ return 0;
+
+ return a.st_dev != b.st_dev;
+}
+
+/* End of original sd-daemon.c from systemd sources */
+
+int
+netsnmp_sd_find_inet_socket(int family, int type, int listening, int port)
+{
+ int count, fd;
+
+ count = netsnmp_sd_listen_fds(0);
+ if (count <= 0) {
+ DEBUGMSGTL(("systemd:find_inet_socket", "No LISTEN_FDS found.\n"));
+ return 0;
+ }
+ DEBUGMSGTL(("systemd:find_inet_socket", "LISTEN_FDS reports %d sockets.\n",
+ count));
+
+ for (fd = 3; fd < 3+count; fd++) {
+ int rc = netsnmp_sd_is_socket_inet(fd, family, type, listening, port);
+ if (rc < 0)
+ DEBUGMSGTL(("systemd:find_inet_socket",
+ "sd_is_socket_inet error: %d\n", rc));
+ if (rc > 0) {
+ DEBUGMSGTL(("systemd:find_inet_socket",
+ "Found the socket in LISTEN_FDS\n"));
+ return fd;
+ }
+ }
+ DEBUGMSGTL(("systemd:find_inet_socket", "Socket not found in LISTEN_FDS\n"));
+ return 0;
+}
+
+int
+netsnmp_sd_find_unix_socket(int type, int listening, const char *path)
+{
+ int count, fd;
+
+ count = netsnmp_sd_listen_fds(0);
+ if (count <= 0) {
+ DEBUGMSGTL(("systemd:find_unix_socket", "No LISTEN_FDS found.\n"));
+ return 0;
+ }
+ DEBUGMSGTL(("systemd:find_unix_socket", "LISTEN_FDS reports %d sockets.\n",
+ count));
+
+ for (fd = 3; fd < 3+count; fd++) {
+ int rc = netsnmp_sd_is_socket_unix(fd, type, listening, path, 0);
+ if (rc < 0)
+ DEBUGMSGTL(("systemd:find_unix_socket",
+ "netsnmp_sd_is_socket_unix error: %d\n", rc));
+ if (rc > 0) {
+ DEBUGMSGTL(("systemd:find_unix_socket",
+ "Found the socket in LISTEN_FDS\n"));
+ return fd;
+ }
+ }
+ DEBUGMSGTL(("systemd:find_unix_socket", "Socket not found in LISTEN_FDS\n"));
+ return 0;
+}
+
+#endif /* ! NETSNMP_NO_SYSTEMD */
diff --git a/snmplib/transports/snmpTCPDomain.c b/snmplib/transports/snmpTCPDomain.c
index b8bdba4..ab7f3a1 100644
--- a/snmplib/transports/snmpTCPDomain.c
+++ b/snmplib/transports/snmpTCPDomain.c
@@ -43,6 +43,10 @@
#include <net-snmp/library/snmpTCPBaseDomain.h>
#include <net-snmp/library/tools.h>
+#ifndef NETSNMP_NO_SYSTEMD
+#include <net-snmp/library/sd-daemon.h>
+#endif
+
/*
* needs to be in sync with the definitions in snmplib/snmpUDPDomain.c
* and perl/agent/agent.xs
@@ -149,6 +153,7 @@ netsnmp_tcp_transport(struct sockaddr_in *addr, int local)
netsnmp_transport *t = NULL;
netsnmp_udp_addr_pair *addr_pair = NULL;
int rc = 0;
+ int socket_initialized = 0;
#ifdef NETSNMP_NO_LISTEN_SUPPORT
if (local)
@@ -178,7 +183,19 @@ netsnmp_tcp_transport(struct sockaddr_in *addr, int local)
t->domain_length =
sizeof(netsnmp_snmpTCPDomain) / sizeof(netsnmp_snmpTCPDomain[0]);
- t->sock = socket(PF_INET, SOCK_STREAM, 0);
+#ifndef NETSNMP_NO_SYSTEMD
+ /*
+ * Maybe the socket was already provided by systemd...
+ */
+ if (local) {
+ t->sock = netsnmp_sd_find_inet_socket(PF_INET, SOCK_STREAM, 1,
+ ntohs(addr->sin_port));
+ if (t->sock)
+ socket_initialized = 1;
+ }
+#endif
+ if (!socket_initialized)
+ t->sock = socket(PF_INET, SOCK_STREAM, 0);
if (t->sock < 0) {
netsnmp_transport_free(t);
return NULL;
@@ -215,11 +232,13 @@ netsnmp_tcp_transport(struct sockaddr_in *addr, int local)
setsockopt(t->sock, SOL_SOCKET, SO_REUSEADDR, (void *)&opt,
sizeof(opt));
- rc = bind(t->sock, (struct sockaddr *)addr, sizeof(struct sockaddr));
- if (rc != 0) {
- netsnmp_socketbase_close(t);
- netsnmp_transport_free(t);
- return NULL;
+ if (!socket_initialized) {
+ rc = bind(t->sock, (struct sockaddr *)addr, sizeof(struct sockaddr));
+ if (rc != 0) {
+ netsnmp_socketbase_close(t);
+ netsnmp_transport_free(t);
+ return NULL;
+ }
}
/*
@@ -235,12 +254,13 @@ netsnmp_tcp_transport(struct sockaddr_in *addr, int local)
/*
* Now sit here and wait for connections to arrive.
*/
-
- rc = listen(t->sock, NETSNMP_STREAM_QUEUE_LEN);
- if (rc != 0) {
- netsnmp_socketbase_close(t);
- netsnmp_transport_free(t);
- return NULL;
+ if (!socket_initialized) {
+ rc = listen(t->sock, NETSNMP_STREAM_QUEUE_LEN);
+ if (rc != 0) {
+ netsnmp_socketbase_close(t);
+ netsnmp_transport_free(t);
+ return NULL;
+ }
}
/*
diff --git a/snmplib/transports/snmpTCPIPv6Domain.c b/snmplib/transports/snmpTCPIPv6Domain.c
index 3c96856..49f4610 100644
--- a/snmplib/transports/snmpTCPIPv6Domain.c
+++ b/snmplib/transports/snmpTCPIPv6Domain.c
@@ -49,6 +49,10 @@
#include <net-snmp/library/snmpTCPBaseDomain.h>
#include <net-snmp/library/tools.h>
+#ifndef NETSNMP_NO_SYSTEMD
+#include <net-snmp/library/sd-daemon.h>
+#endif
+
#include "inet_ntop.h"
oid netsnmp_TCPIPv6Domain[] = { TRANSPORT_DOMAIN_TCP_IPV6 };
@@ -140,6 +144,7 @@ netsnmp_tcp6_transport(struct sockaddr_in6 *addr, int local)
{
netsnmp_transport *t = NULL;
int rc = 0;
+ int socket_initialized = 0;
#ifdef NETSNMP_NO_LISTEN_SUPPORT
if (local)
@@ -174,7 +179,19 @@ netsnmp_tcp6_transport(struct sockaddr_in6 *addr, int local)
t->domain = netsnmp_TCPIPv6Domain;
t->domain_length = sizeof(netsnmp_TCPIPv6Domain) / sizeof(oid);
- t->sock = socket(PF_INET6, SOCK_STREAM, 0);
+#ifndef NETSNMP_NO_SYSTEMD
+ /*
+ * Maybe the socket was already provided by systemd...
+ */
+ if (local) {
+ t->sock = netsnmp_sd_find_inet_socket(PF_INET6, SOCK_STREAM, 1,
+ ntohs(addr->sin6_port));
+ if (t->sock)
+ socket_initialized = 1;
+ }
+#endif
+ if (!socket_initialized)
+ t->sock = socket(PF_INET6, SOCK_STREAM, 0);
if (t->sock < 0) {
netsnmp_transport_free(t);
return NULL;
@@ -220,12 +237,14 @@ netsnmp_tcp6_transport(struct sockaddr_in6 *addr, int local)
setsockopt(t->sock, SOL_SOCKET, SO_REUSEADDR, (void *)&opt, sizeof(opt));
- rc = bind(t->sock, (struct sockaddr *) addr,
- sizeof(struct sockaddr_in6));
- if (rc != 0) {
- netsnmp_socketbase_close(t);
- netsnmp_transport_free(t);
- return NULL;
+ if (!socket_initialized) {
+ rc = bind(t->sock, (struct sockaddr *) addr,
+ sizeof(struct sockaddr_in6));
+ if (rc != 0) {
+ netsnmp_socketbase_close(t);
+ netsnmp_transport_free(t);
+ return NULL;
+ }
}
/*
@@ -242,11 +261,13 @@ netsnmp_tcp6_transport(struct sockaddr_in6 *addr, int local)
* Now sit here and wait for connections to arrive.
*/
- rc = listen(t->sock, NETSNMP_STREAM_QUEUE_LEN);
- if (rc != 0) {
- netsnmp_socketbase_close(t);
- netsnmp_transport_free(t);
- return NULL;
+ if (!socket_initialized) {
+ rc = listen(t->sock, NETSNMP_STREAM_QUEUE_LEN);
+ if (rc != 0) {
+ netsnmp_socketbase_close(t);
+ netsnmp_transport_free(t);
+ return NULL;
+ }
}
/*
diff --git a/snmplib/transports/snmpUDPIPv4BaseDomain.c b/snmplib/transports/snmpUDPIPv4BaseDomain.c
index c67427b..428e6d6 100644
--- a/snmplib/transports/snmpUDPIPv4BaseDomain.c
+++ b/snmplib/transports/snmpUDPIPv4BaseDomain.c
@@ -40,6 +40,10 @@
#include <net-snmp/library/snmpSocketBaseDomain.h>
+#ifndef NETSNMP_NO_SYSTEMD
+#include <net-snmp/library/sd-daemon.h>
+#endif
+
#if (defined(linux) && defined(IP_PKTINFO)) \
|| defined(IP_RECVDSTADDR) && HAVE_STRUCT_MSGHDR_MSG_CONTROL \
&& HAVE_STRUCT_MSGHDR_MSG_FLAGS
@@ -67,6 +71,7 @@ netsnmp_udpipv4base_transport(struct sockaddr_in *addr, int local)
char *client_socket = NULL;
netsnmp_indexed_addr_pair addr_pair;
socklen_t local_addr_len;
+ int socket_initialized = 0;
#ifdef NETSNMP_NO_LISTEN_SUPPORT
if (local)
@@ -91,7 +96,19 @@ netsnmp_udpipv4base_transport(struct sockaddr_in *addr, int local)
free(str);
}
- t->sock = socket(PF_INET, SOCK_DGRAM, 0);
+#ifndef NETSNMP_NO_SYSTEMD
+ /*
+ * Maybe the socket was already provided by systemd...
+ */
+ if (local) {
+ t->sock = netsnmp_sd_find_inet_socket(PF_INET, SOCK_DGRAM, -1,
+ ntohs(addr->sin_port));
+ if (t->sock)
+ socket_initialized = 1;
+ }
+#endif
+ if (!socket_initialized)
+ t->sock = socket(PF_INET, SOCK_DGRAM, 0);
DEBUGMSGTL(("UDPBase", "openned socket %d as local=%d\n", t->sock, local));
if (t->sock < 0) {
netsnmp_transport_free(t);
@@ -141,12 +158,14 @@ netsnmp_udpipv4base_transport(struct sockaddr_in *addr, int local)
DEBUGMSGTL(("netsnmp_udp", "set IP_RECVDSTADDR\n"));
}
#endif
- rc = bind(t->sock, (struct sockaddr *) addr,
- sizeof(struct sockaddr));
- if (rc != 0) {
- netsnmp_socketbase_close(t);
- netsnmp_transport_free(t);
- return NULL;
+ if (!socket_initialized) {
+ rc = bind(t->sock, (struct sockaddr *) addr,
+ sizeof(struct sockaddr));
+ if (rc != 0) {
+ netsnmp_socketbase_close(t);
+ netsnmp_transport_free(t);
+ return NULL;
+ }
}
t->data = NULL;
t->data_length = 0;
diff --git a/snmplib/transports/snmpUDPIPv6Domain.c b/snmplib/transports/snmpUDPIPv6Domain.c
index b3eaae4..e275ead 100644
--- a/snmplib/transports/snmpUDPIPv6Domain.c
+++ b/snmplib/transports/snmpUDPIPv6Domain.c
@@ -67,6 +67,10 @@ static const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
#include <net-snmp/library/snmpSocketBaseDomain.h>
#include <net-snmp/library/tools.h>
+#ifndef NETSNMP_NO_SYSTEMD
+#include <net-snmp/library/sd-daemon.h>
+#endif
+
#include "inet_ntop.h"
#include "inet_pton.h"
@@ -190,6 +194,7 @@ netsnmp_udp6_transport(struct sockaddr_in6 *addr, int local)
{
netsnmp_transport *t = NULL;
int rc = 0;
+ int socket_initialized = 0;
#ifdef NETSNMP_NO_LISTEN_SUPPORT
if (local)
@@ -217,7 +222,19 @@ netsnmp_udp6_transport(struct sockaddr_in6 *addr, int local)
t->domain_length =
sizeof(netsnmp_UDPIPv6Domain) / sizeof(netsnmp_UDPIPv6Domain[0]);
- t->sock = socket(PF_INET6, SOCK_DGRAM, 0);
+#ifndef NETSNMP_NO_SYSTEMD
+ /*
+ * Maybe the socket was already provided by systemd...
+ */
+ if (local) {
+ t->sock = netsnmp_sd_find_inet_socket(PF_INET6, SOCK_DGRAM, -1,
+ ntohs(addr->sin6_port));
+ if (t->sock)
+ socket_initialized = 1;
+ }
+#endif
+ if (!socket_initialized)
+ t->sock = socket(PF_INET6, SOCK_DGRAM, 0);
if (t->sock < 0) {
netsnmp_transport_free(t);
return NULL;
@@ -242,13 +259,14 @@ netsnmp_udp6_transport(struct sockaddr_in6 *addr, int local)
}
}
#endif
-
- rc = bind(t->sock, (struct sockaddr *) addr,
- sizeof(struct sockaddr_in6));
- if (rc != 0) {
- netsnmp_socketbase_close(t);
- netsnmp_transport_free(t);
- return NULL;
+ if (!socket_initialized) {
+ rc = bind(t->sock, (struct sockaddr *) addr,
+ sizeof(struct sockaddr_in6));
+ if (rc != 0) {
+ netsnmp_socketbase_close(t);
+ netsnmp_transport_free(t);
+ return NULL;
+ }
}
t->local = (unsigned char*)malloc(18);
if (t->local == NULL) {
diff --git a/snmplib/transports/snmpUnixDomain.c b/snmplib/transports/snmpUnixDomain.c
index 674dc2b..f0d8e4f 100644
--- a/snmplib/transports/snmpUnixDomain.c
+++ b/snmplib/transports/snmpUnixDomain.c
@@ -37,6 +37,10 @@
#include <net-snmp/library/system.h> /* mkdirhier */
#include <net-snmp/library/tools.h>
+#ifndef NETSNMP_NO_SYSTEMD
+#include <net-snmp/library/sd-daemon.h>
+#endif
+
netsnmp_feature_child_of(transport_unix_socket_all, transport_all)
netsnmp_feature_child_of(unix_socket_paths, transport_unix_socket_all)
@@ -295,6 +299,7 @@ netsnmp_unix_transport(struct sockaddr_un *addr, int local)
netsnmp_transport *t = NULL;
sockaddr_un_pair *sup = NULL;
int rc = 0;
+ int socket_initialized = 0;
#ifdef NETSNMP_NO_LISTEN_SUPPORT
/* SPECIAL CIRCUMSTANCE: We still want AgentX to be able to operate,
@@ -333,7 +338,18 @@ netsnmp_unix_transport(struct sockaddr_un *addr, int local)
t->data_length = sizeof(sockaddr_un_pair);
sup = (sockaddr_un_pair *) t->data;
- t->sock = socket(PF_UNIX, SOCK_STREAM, 0);
+#ifndef NETSNMP_NO_SYSTEMD
+ /*
+ * Maybe the socket was already provided by systemd...
+ */
+ if (local) {
+ t->sock = netsnmp_sd_find_unix_socket(SOCK_STREAM, 1, addr->sun_path);
+ if (t->sock)
+ socket_initialized = 1;
+ }
+#endif
+ if (!socket_initialized)
+ t->sock = socket(PF_UNIX, SOCK_STREAM, 0);
if (t->sock < 0) {
netsnmp_transport_free(t);
return NULL;
@@ -357,25 +373,26 @@ netsnmp_unix_transport(struct sockaddr_un *addr, int local)
t->flags |= NETSNMP_TRANSPORT_FLAG_LISTEN;
- unlink(addr->sun_path);
- rc = bind(t->sock, (struct sockaddr *) addr, SUN_LEN(addr));
-
- if (rc != 0 && errno == ENOENT && create_path) {
- rc = mkdirhier(addr->sun_path, create_mode, 1);
+ if (!socket_initialized) {
+ unlink(addr->sun_path);
+ rc = bind(t->sock, (struct sockaddr *) addr, SUN_LEN(addr));
+ if (rc != 0 && errno == ENOENT && create_path) {
+ rc = mkdirhier(addr->sun_path, create_mode, 1);
+ if (rc != 0) {
+ netsnmp_unix_close(t);
+ netsnmp_transport_free(t);
+ return NULL;
+ }
+ rc = bind(t->sock, (struct sockaddr *) addr, SUN_LEN(addr));
+ }
if (rc != 0) {
+ DEBUGMSGTL(("netsnmp_unix_transport",
+ "couldn't bind \"%s\", errno %d (%s)\n",
+ addr->sun_path, errno, strerror(errno)));
netsnmp_unix_close(t);
netsnmp_transport_free(t);
return NULL;
}
- rc = bind(t->sock, (struct sockaddr *) addr, SUN_LEN(addr));
- }
- if (rc != 0) {
- DEBUGMSGTL(("netsnmp_unix_transport",
- "couldn't bind \"%s\", errno %d (%s)\n",
- addr->sun_path, errno, strerror(errno)));
- netsnmp_unix_close(t);
- netsnmp_transport_free(t);
- return NULL;
}
/*
@@ -391,16 +408,17 @@ netsnmp_unix_transport(struct sockaddr_un *addr, int local)
* Now sit here and listen for connections to arrive.
*/
- rc = listen(t->sock, NETSNMP_STREAM_QUEUE_LEN);
- if (rc != 0) {
- DEBUGMSGTL(("netsnmp_unix_transport",
- "couldn't listen to \"%s\", errno %d (%s)\n",
- addr->sun_path, errno, strerror(errno)));
- netsnmp_unix_close(t);
- netsnmp_transport_free(t);
- return NULL;
+ if (!socket_initialized) {
+ rc = listen(t->sock, NETSNMP_STREAM_QUEUE_LEN);
+ if (rc != 0) {
+ DEBUGMSGTL(("netsnmp_unix_transport",
+ "couldn't listen to \"%s\", errno %d (%s)\n",
+ addr->sun_path, errno, strerror(errno)));
+ netsnmp_unix_close(t);
+ netsnmp_transport_free(t);
+ return NULL;
+ }
}
-
} else {
t->remote = (u_char *)malloc(strlen(addr->sun_path));
if (t->remote == NULL) {
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