snmp agent

/* * snmpd.c */ /** @defgroup agent The Net-SNMP agent * The snmp agent responds to SNMP queries from management stations */ /* Portions of this file are subject to the following copyrights. See * the Net-SNMP's COPYING file for more details and other copyrights * that may apply: */ /* * Copyright 1988, 1989 by Carnegie Mellon University * * All Rights Reserved * * Permission to use, copy, modify, and distribute this software and its * documentation for any purpose and without fee is hereby granted, * provided that the above copyright notice appear in all copies and that * both that copyright notice and this permission notice appear in * supporting documentation, and that the name of CMU not be * used in advertising or publicity pertaining to distribution of the * software without specific, written prior permission. * * CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL * CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS * SOFTWARE. * ***************************************************************** */ /* * Copyright � 2003 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms specified in the COPYING file * distributed with the Net-SNMP package. */ #include <net-snmp/net-snmp-config.h> #if HAVE_IO_H #include <io.h> #endif #include <stdio.h> #include <errno.h> #if HAVE_STRING_H #include <string.h> #else #include <strings.h> #endif #if HAVE_STDLIB_H #include <stdlib.h> #endif #if HAVE_UNISTD_H #include <unistd.h> #endif #include <sys/types.h> #if HAVE_NETINET_IN_H #include <netinet/in.h> #endif #if HAVE_ARPA_INET_H #include <arpa/inet.h> #endif #if TIME_WITH_SYS_TIME # ifdef WIN32 # include <sys/timeb.h> # else # include <sys/time.h> # endif # include <time.h> #else # if HAVE_SYS_TIME_H # include <sys/time.h> # else # include <time.h> # endif #endif #if HAVE_SYS_SELECT_H #include <sys/select.h> #endif #if HAVE_SYS_SOCKET_H #include <sys/socket.h> #elif HAVE_WINSOCK_H #include <winsock.h> #endif #if HAVE_NET_IF_H #include <net/if.h> #endif #if HAVE_INET_MIB2_H #include <inet/mib2.h> #endif #if HAVE_SYS_IOCTL_H #include <sys/ioctl.h> #endif #if HAVE_SYS_FILE_H #include <sys/file.h> #endif #ifdef HAVE_FCNTL_H #include <fcntl.h> #endif #if HAVE_SYS_WAIT_H #include <sys/wait.h> #endif #include <signal.h> #ifdef HAVE_SYS_PARAM_H #include <sys/param.h> #endif #if HAVE_PROCESS_H /* Win32-getpid */ #include <process.h> #endif #if HAVE_LIMITS_H #include <limits.h> #endif #if HAVE_PWD_H #include <pwd.h> #endif #if HAVE_GRP_H #include <grp.h> #endif #ifndef PATH_MAX # ifdef _POSIX_PATH_MAX # define PATH_MAX _POSIX_PATH_MAX # else # define PATH_MAX 255 # endif #endif #ifndef FD_SET typedef long fd_mask; #define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */ #define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS))) #define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS))) #define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS))) #define FD_ZERO(p) memset((p), 0, sizeof(*(p))) #endif #include <net-snmp/net-snmp-includes.h> #include <net-snmp/agent/net-snmp-agent-includes.h> #include <net-snmp/library/fd_event_manager.h> #include "m2m.h" #include <net-snmp/agent/mib_module_config.h> #include "snmpd.h" #include "mibgroup/struct.h" #include <net-snmp/agent/mib_modules.h> #include "mibgroup/util_funcs.h" #include <net-snmp/agent/agent_trap.h> #include <net-snmp/agent/table.h> #include <net-snmp/agent/table_iterator.h> #include "mib_module_includes.h" /* * Include winservice.h to support Windows Service */ #ifdef WIN32 #include <windows.h> #include <tchar.h> #include <net-snmp/library/winservice.h> #define WIN32SERVICE #endif /* * Globals. */ #ifdef NETSNMP_USE_LIBWRAP #include <tcpd.h> #endif /* NETSNMP_USE_LIBWRAP */ #define TIMETICK 500000L int snmp_dump_packet; int reconfig = 0; int Facility = LOG_DAEMON; #ifdef WIN32SERVICE /* * SNMP Agent Status */ #define AGENT_RUNNING 1 #define AGENT_STOPPED 0 int agent_status = AGENT_STOPPED; /* app_name_long used for Event Log (syslog), SCM, registry etc */ LPTSTR app_name_long = _T("Net-SNMP Agent"); /* Application Name */ #endif const char *app_name = "snmpd"; extern int netsnmp_running; extern char **argvrestartp; extern char *argvrestart; extern char *argvrestartname; #ifdef USING_SMUX_MODULE #include <mibgroup/smux/smux.h> #endif /* USING_SMUX_MODULE */ /* * Prototypes. */ int snmp_read_packet(int); int snmp_input(int, netsnmp_session *, int, netsnmp_pdu *, void *); static void usage(char *); static void SnmpTrapNodeDown(void); static int receive(void); #ifdef WIN32SERVICE void StopSnmpAgent(void); int SnmpDaemonMain(int argc, TCHAR * argv[]); int __cdecl _tmain(int argc, TCHAR * argv[]); #else int main(int, char **); #endif /* * These definitions handle 4.2 systems without additional syslog facilities. */ #ifndef LOG_CONS #define LOG_CONS 0 /* Don't bother if not defined... */ #endif #ifndef LOG_PID #define LOG_PID 0 /* Don't bother if not defined... */ #endif #ifndef LOG_LOCAL0 #define LOG_LOCAL0 0 #endif #ifndef LOG_LOCAL1 #define LOG_LOCAL1 0 #endif #ifndef LOG_LOCAL2 #define LOG_LOCAL2 0 #endif #ifndef LOG_LOCAL3 #define LOG_LOCAL3 0 #endif #ifndef LOG_LOCAL4 #define LOG_LOCAL4 0 #endif #ifndef LOG_LOCAL5 #define LOG_LOCAL5 0 #endif #ifndef LOG_LOCAL6 #define LOG_LOCAL6 0 #endif #ifndef LOG_LOCAL7 #define LOG_LOCAL7 0 #endif #ifndef LOG_DAEMON #define LOG_DAEMON 0 #endif static void usage(char *prog) { #ifdef WIN32SERVICE printf("\nUsage: %s [-register] [-quiet] [OPTIONS] [LISTENING ADDRESSES]", prog); printf("\n %s [-unregister] [-quiet]", prog); #else printf("\nUsage: %s [OPTIONS] [LISTENING ADDRESSES]", prog); #endif printf("\n"); printf("\n\tVersion: %s\n", netsnmp_get_version()); printf("\tWeb: http://www.net-snmp.org/\n"); printf("\tEmail: net-snmp-coders@lists.sourceforge.net\n"); printf("\n -a\t\t\tlog addresses\n"); printf(" -A\t\t\tappend to the logfile rather than truncating it\n"); printf(" -c FILE[,...]\t\tread FILE(s) as configuration file(s)\n"); printf(" -C\t\t\tdo not read the default configuration files\n"); printf(" -d\t\t\tdump sent and received SNMP packets\n"); printf(" -D TOKEN[,...]\tturn on debugging output for the given TOKEN(s)\n" "\t\t\t (try ALL for extremely verbose output)\n"); printf(" -f\t\t\tdo not fork from the shell\n"); #if HAVE_UNISTD_H printf(" -g GID\t\tchange to this numeric gid after opening\n" "\t\t\t transport endpoints\n"); #endif printf(" -h, --help\t\tdisplay this usage message\n"); printf(" -H\t\t\tdisplay configuration file directives understood\n"); printf(" -I [-]INITLIST\tlist of mib modules to initialize (or not)\n"); printf("\t\t\t (run snmpd with -Dmib_init for a list)\n"); printf(" -L <LOGOPTS>\t\ttoggle options controlling where to log to\n"); snmp_log_options_usage("\t", stdout); printf(" -m MIBLIST\t\tuse MIBLIST instead of the default MIB list\n"); printf(" -M DIRLIST\t\tuse DIRLIST as the list of locations\n\t\t\t to look for MIBs\n"); printf(" -p FILE\t\tstore process id in FILE\n"); printf(" -q\t\t\tprint information in a more parsable format\n"); printf(" -r\t\t\tdo not exit if files only accessible to root\n" "\t\t\t cannot be opened\n"); #ifdef WIN3