/* * snmptrapd.c - receive and log snmp traps * */ /***************************************************************** Copyright 1989, 1991, 1992 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. ******************************************************************/ #include #if HAVE_STDLIB_H #include #endif #if HAVE_UNISTD_H #include #endif #if HAVE_STRING_H #include #else #include #endif #include #if HAVE_SYS_WAIT_H #include #endif #if HAVE_WINSOCK_H #include #else #include #endif #if HAVE_SYS_SOCKIO_H #include #endif #if HAVE_NETINET_IN_H #include #endif #include #if HAVE_SYS_TIME_H # include # if TIME_WITH_SYS_TIME # include # endif #else # include #endif #if HAVE_SYS_SELECT_H #include #endif #if HAVE_SYS_PARAM_H #include #endif #if HAVE_SYSLOG_H #include #endif #if HAVE_SYS_IOCTL_H #include #endif #if HAVE_NET_IF_H #include #endif #if HAVE_NETDB_H #include #endif #if HAVE_ARPA_INET_H #include #endif #if HAVE_FCNTL_H #include #endif #if HAVE_PROCESS_H /* Win32-getpid */ #include #endif #include #include #include #include #include #include "snmptrapd_handlers.h" #include "snmptrapd_log.h" #include "snmptrapd_auth.h" #include "notification-log-mib/notification_log.h" /* * Include winservice.h to support Windows Service */ #ifdef WIN32 #include #include #include #define WIN32SERVICE #endif #if USE_LIBWRAP #include #endif #ifndef BSD4_3 #define BSD4_2 #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 char *logfile = 0; int SyslogTrap = 0; int Event = 0; int dropauth = 0; int reconfig = 0; char ddefault_port[] = "udp:162"; /* Default default port */ char *default_port = ddefault_port; #if HAVE_GETPID FILE *PID; char *pid_file = NULL; #endif char *trap1_fmt_str_remember = NULL; int dofork = 1; extern int netsnmp_running; /* * 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 /* * Include an extra Facility variable to allow command line adjustment of * syslog destination */ int Facility = LOG_DAEMON; #ifdef WIN32SERVICE /* * SNMP Trap Receiver Status */ #define SNMPTRAPD_RUNNING 1 #define SNMPTRAPD_STOPPED 0 int trapd_status = SNMPTRAPD_STOPPED; /* app_name_long used for Event Log (syslog), SCM, registry etc */ LPTSTR app_name_long = _T("Net-SNMP Trap Handler"); /* Application Name */ #endif const char *app_name = "snmptrapd"; struct timeval Now; void trapd_update_config(void); static oid risingAlarm[] = { 1, 3, 6, 1, 6, 3, 2, 1, 1, 3, 1 }; static oid fallingAlarm[] = { 1, 3, 6, 1, 6, 3, 2, 1, 1, 3, 2 }; static oid unavailableAlarm[] = { 1, 3, 6, 1, 6, 3, 2, 1, 1, 3, 3 }; #ifdef WIN32SERVICE void StopSnmpTrapd(void); int SnmpTrapdMain(int argc, TCHAR * argv[]); int __cdecl _tmain(int argc, TCHAR * argv[]); #else int main(int, char **); #endif #if defined(USING_AGENTX_SUBAGENT_MODULE) && !defined(SNMPTRAPD_DISABLE_AGENTX) extern void subagent_init(void); #endif void event_input(netsnmp_variable_list * vp) { int eventid = 0; oid variable[MAX_OID_LEN]; int variablelen = 0; u_long destip = 0; int sampletype = 0; int value = 0; int threshold = 0; int i; int nvars = 0; netsnmp_variable_list *vp2 = vp; oid *op = NULL; /* Make sure there are 5 variables. Otherwise, don't bother */ for (i=1; i <= 5; i++) { vp2 = vp2->next_variable; if (!vp2) { nvars = -1; break; } } if (nvars != -1) { vp = vp->next_variable; /* skip sysUptime */ if (vp->val_len != sizeof(risingAlarm) || !memcmp(vp->val.objid, risingAlarm, sizeof(risingAlarm))) eventid = 1; else if (vp->val_len != sizeof(risingAlarm) || !memcmp(vp->val.objid, fallingAlarm, sizeof(fallingAlarm))) eventid = 2; else if (vp->val_len != sizeof(risingAlarm) || !memcmp(vp->val.objid, unavailableAlarm, sizeof(unavailableAlarm))) eventid = 3; else { fprintf(stderr, "unknown event\n"); eventid = 0; } vp = vp->next_variable; memmove(variable, vp->val.objid, vp->val_len * sizeof(oid)); variablelen = vp->val_len; op = vp->name + 22; destip = 0; destip |= (*op++) << 24; destip |= (*op++) << 16; destip |= (*op++) << 8; destip |= *op++; vp = vp->next_variable; sampletype = *vp->val.integer; vp = vp->next_variable; value = *vp->val.integer; vp = vp->next_variable; threshold = *vp->val.integer; } printf("%d: 0x%02lX %d %d %d\n", eventid, destip, sampletype, value, threshold); } void usage(void) { #ifdef WIN32SERVICE fprintf(stderr, "\nUsage: snmptrapd [-register] [-quiet] [OPTIONS] [LISTENING ADDRESSES]"); fprintf(stderr, "\n snmptrapd [-unregister] [-quiet]"); #else fprintf(stderr, "Usage: snmptrapd [OPTIONS] [LISTENING ADDRESSES]\n"); #endif fprintf(stderr, "\n\tNET-SNMP Version: %s\n", netsnmp_get_version()); fprintf(stderr, "\tWeb: http://www.net-snmp.org/\n"); fprintf(stderr, "\tEmail: net-snmp-coders@lists.sourceforge.net\n"); fprintf(stderr, "\n"); fprintf(stderr, " -a\t\t\tignore authentication failure traps\n"); fprintf(stderr, " -c FILE\t\tread FILE as a configuration file\n"); fprintf(stderr, " -C\t\t\tdo not read the default configuration files\n"); fprintf(stderr, " -d\t\t\tdump sent and received SNMP packets\n"); fprintf(stderr, " -D\t\t\tturn on debugging output\n"); fprintf(stderr, " -e\t\t\tprint event # (rising/falling alarm, etc.)\n"); fprintf(stderr, " -f\t\t\tdo not fork from the shell\n"); fprintf(stderr, " -F FORMAT\t\tuse specified format for logging to standard error\n"); fprintf(stderr, " -h, --help\t\tdisplay this usage message\n"); fprintf(stderr, " -H\t\t\tdisplay configuration file directives understood\n"); fprintf(stderr, " -m MIBLIST\t\tuse MIBLIST instead of the default MIB list\n"); fprintf(stderr, " -M DIRLIST\t\tuse DIRLIST as the list of locations\n\t\t\t to look for MIBs\n"); fprintf(stderr, " -n\t\t\tuse numeric addresses instead of attempting\n\t\t\t hostname lookups (no DNS)\n"); #if HAVE_GETPID fprintf(stderr, " -p FILE\t\tstore process id in FILE\n"); #endif #ifdef WIN32SERVICE fprintf(stderr, " -register\t\tregister as a Windows service\n"); fprintf(stderr, " \t\t\t (followed by -quiet to prevent message popups)\n"); fprintf(stderr, " \t\t\t (followed by the startup parameter list)\n"); fprintf(stderr, " \t\t\t Note that some parameters are not relevant when running as a service\n"); #endif fprintf(stderr, " -t\t\t\tPrevent traps from being logged to syslog\n"); #ifdef WIN32SERVICE fprintf(stderr, " -unregister\t\tunregister as a Windows service\n"); fprintf(stderr, " \t\t\t (followed -quiet to prevent message popups)\n"); #endif fprintf(stderr, " -v, --version\t\tdisplay version information\n"); #if defined(USING_AGENTX_SUBAGENT_MODULE) && !defined(SNMPTRAPD_DISABLE_AGENTX) fprintf(stderr, " -x ADDRESS\t\tuse ADDRESS as AgentX address\n"); #endif fprintf(stderr, " -O \t\ttoggle options controlling output display\n"); snmp_out_toggle_options_usage("\t\t\t", stderr); fprintf(stderr, " -L \t\ttoggle options controlling where to log to\n"); snmp_log_options_usage("\t\t\t", stderr); fprintf(stderr, "\n Deprecated options:\n"); fprintf(stderr, " -o FILE\t\tuse -Lf instead\n"); fprintf(stderr, " -P\t\t\tuse -f -Le instead\n"); fprintf(stderr, " -s\t\t\tuse -Lsd instead\n"); fprintf(stderr, " -S d|i|0-7\t\tuse -Ls instead\n"); fprintf(stderr, " -u FILE\t\tuse -p instead\n"); } static void version(void) { printf("\nNET-SNMP Version: %s\n", netsnmp_get_version()); printf("Web: http://www.net-snmp.org/\n"); printf("Email: net-snmp-coders@lists.sourceforge.net\n\n"); exit(0); } RETSIGTYPE term_handler(int sig) { #ifdef WIN32SERVICE extern netsnmp_session *main_session; #endif netsnmp_running = 0; #ifdef WIN32SERVICE /* * In case of windows, select() in receive() function will not return * on signal. Thats why following function is called, which closes the * socket descriptors and causes the select() to return */ snmp_close(main_session); #endif } #ifdef SIGHUP RETSIGTYPE hup_handler(int sig) { reconfig = 1; signal(SIGHUP, hup_handler); } #endif static int pre_parse(netsnmp_session * session, netsnmp_transport *transport, void *transport_data, int transport_data_length) { #if USE_LIBWRAP char *addr_string = NULL; if (transport != NULL && transport->f_fmtaddr != NULL) { /* * Okay I do know how to format this address for logging. */ addr_string = transport->f_fmtaddr(transport, transport_data, transport_data_length); /* * Don't forget to free() it. */ } if (addr_string != NULL) { /* Catch udp,udp6,tcp,tcp6 transports using "[" */ char *tcpudpaddr = strstr(addr_string, "["); if ( tcpudpaddr != 0 ) { char sbuf[64]; char *xp; strncpy(sbuf, tcpudpaddr + 1, sizeof(sbuf)); sbuf[sizeof(sbuf)-1] = '\0'; xp = strstr(sbuf, "]"); if (xp) *xp = '\0'; if (hosts_ctl("snmptrapd", STRING_UNKNOWN, sbuf, STRING_UNKNOWN) == 0) { DEBUGMSGTL(("snmptrapd:libwrap", "%s rejected", addr_string)); SNMP_FREE(addr_string); return 0; } } SNMP_FREE(addr_string); } else { if (hosts_ctl("snmptrapd", STRING_UNKNOWN, STRING_UNKNOWN, STRING_UNKNOWN) == 0) { DEBUGMSGTL(("snmptrapd:libwrap", "[unknown] rejected")); return 0; } } #endif/* USE_LIBWRAP */ return 1; } static netsnmp_session * snmptrapd_add_session(netsnmp_transport *t) { netsnmp_session sess, *session = &sess, *rc = NULL; snmp_sess_init(session); session->peername = SNMP_DEFAULT_PEERNAME; /* Original code had NULL here */ session->version = SNMP_DEFAULT_VERSION; session->community_len = SNMP_DEFAULT_COMMUNITY_LEN; session->retries = SNMP_DEFAULT_RETRIES; session->timeout = SNMP_DEFAULT_TIMEOUT; session->callback = snmp_input; session->callback_magic = (void *) t; session->authenticator = NULL; sess.isAuthoritative = SNMP_SESS_UNKNOWNAUTH; rc = snmp_add(session, t, pre_parse, NULL); if (rc == NULL) { snmp_sess_perror("snmptrapd", session); } return rc; } static void snmptrapd_close_sessions(netsnmp_session * sess_list) { netsnmp_session *s = NULL, *next = NULL; for (s = sess_list; s != NULL; s = next) { next = s->next; snmp_close(s); } } void parse_trapd_address(const char *token, char *cptr) { char buf[BUFSIZ]; cptr = copy_nword(cptr, buf, sizeof(buf)); if (default_port == ddefault_port) { default_port = strdup(buf); } else { strcat( buf, "," ); strcat( buf, default_port ); free(default_port); default_port = strdup(buf); } } void free_trapd_address(void) { if (default_port != ddefault_port) { free(default_port); } } void parse_config_doNotLogTraps(const char *token, char *cptr) { if (atoi(cptr) > 0) SyslogTrap++; } void free_config_pidFile(void) { if (pid_file) free(pid_file); pid_file = NULL; } void parse_config_pidFile(const char *token, char *cptr) { free_config_pidFile(); pid_file = strdup (cptr); } void parse_config_logOption(const char *token, char *cptr) { int my_argc = 0 ; char **my_argv = NULL; snmp_log_options( cptr, my_argc, my_argv ); } void parse_config_doNotFork(const char *token, char *cptr) { if (netsnmp_ds_parse_boolean(cptr) == 1) dofork = 0; } void parse_config_printEventNumbers(const char *token, char *cptr) { if (netsnmp_ds_parse_boolean(cptr) == 1) Event++; } void parse_config_ignoreAuthFailure(const char *token, char *cptr) { if (netsnmp_ds_parse_boolean(cptr) == 1) dropauth = 1; } void parse_config_outputOption(const char *token, char *cptr) { char *cp; cp = snmp_out_toggle_options(cptr); if (cp != NULL) { fprintf(stderr, "Unknown output option passed to -O: %c\n", *cp); } } /*******************************************************************-o-****** * main - Non Windows * SnmpTrapdMain - Windows to support windows service * * Parameters: * argc * *argv[] * * Returns: * 0 Always succeeds. (?) * * * Setup and start the trap receiver daemon. * * Also successfully EXITs with zero for some options. */ int #ifdef WIN32SERVICE SnmpTrapdMain(int argc, TCHAR * argv[]) #else main(int argc, char *argv[]) #endif { char options[128] = "ac:CdD::efF:hHI:L:m:M:no:PqsS:tvx:O:-:"; netsnmp_session *sess_list = NULL, *ss = NULL; netsnmp_transport *transport = NULL; int arg, i = 0, depmsg = 0; int count, numfds, block; fd_set readfds,writefds,exceptfds; struct timeval timeout, *tvp; char *cp, *listen_ports = NULL; #if defined(USING_AGENTX_SUBAGENT_MODULE) && !defined(SNMPTRAPD_DISABLE_AGENTX) int agentx_subagent = 1; #endif netsnmp_trapd_handler *traph; #ifdef SIGTERM signal(SIGTERM, term_handler); #endif #ifdef SIGHUP signal(SIGHUP, hup_handler); #endif #ifdef SIGINT signal(SIGINT, term_handler); #endif #ifdef SIGPIPE signal(SIGPIPE, SIG_IGN); /* 'Inline' failure of wayward readers */ #endif /* * register our configuration handlers now so -H properly displays them */ snmptrapd_register_configs( ); init_usm_conf( "snmptrapd" ); register_config_handler("snmptrapd", "snmpTrapdAddr", parse_trapd_address, free_trapd_address, "string"); register_config_handler("snmptrapd", "doNotLogTraps", parse_config_doNotLogTraps, NULL, "(1|yes|true|0|no|false)"); #if HAVE_GETPID register_config_handler("snmptrapd", "pidFile", parse_config_pidFile, NULL, "string"); #endif register_config_handler("snmptrapd", "logOption", parse_config_logOption, NULL, "string"); register_config_handler("snmptrapd", "doNotFork", parse_config_doNotFork, NULL, "(1|yes|true|0|no|false)"); register_config_handler("snmptrapd", "printEventNumbers", parse_config_printEventNumbers, NULL, "(1|yes|true|0|no|false)"); register_config_handler("snmptrapd", "ignoreAuthFailure", parse_config_ignoreAuthFailure, NULL, "(1|yes|true|0|no|false)"); register_config_handler("snmptrapd", "outputOption", parse_config_outputOption, NULL, "string"); #ifdef WIN32 setvbuf(stdout, NULL, _IONBF, BUFSIZ); #else setvbuf(stdout, NULL, _IOLBF, BUFSIZ); #endif /* * Add some options if they are available. */ #if HAVE_GETPID strcat(options, "p:u:"); #endif #ifdef WIN32 snmp_log_syslogname(app_name_long); #else snmp_log_syslogname(app_name); #endif /* * Now process options normally. */ while ((arg = getopt(argc, argv, options)) != EOF) { switch (arg) { case '-': if (strcasecmp(optarg, "help") == 0) { usage(); exit(0); } if (strcasecmp(optarg, "version") == 0) { version(); exit(0); } handle_long_opt(optarg); break; case 'a': dropauth = 1; break; case 'A': netsnmp_ds_set_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_APPEND_LOGFILES, 1); break; case 'c': if (optarg != NULL) { netsnmp_ds_set_string(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_OPTIONALCONFIG, optarg); } else { usage(); exit(1); } break; case 'C': netsnmp_ds_set_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_DONT_READ_CONFIGS, 1); break; case 'd': snmp_set_dump_packet(1); break; case 'D': debug_register_tokens(optarg); snmp_set_do_debugging(1); break; case 'e': Event++; break; case 'f': dofork = 0; break; case 'F': if (optarg != NULL) { trap1_fmt_str_remember = optarg; } else { usage(); exit(1); } break; case 'h': usage(); exit(0); case 'H': init_agent("snmptrapd"); #ifdef USING_NOTIFICATION_LOG_MIB_NOTIFICATION_LOG_MODULE init_notification_log(); #endif #ifdef NETSNMP_EMBEDDED_PERL init_perl(); #endif init_snmp("snmptrapd"); fprintf(stderr, "Configuration directives understood:\n"); read_config_print_usage(" "); exit(0); case 'I': if (optarg != NULL) { add_to_init_list(optarg); } else { usage(); } break; case 'S': fprintf(stderr, "Warning: -S option is deprecated; use -Ls instead\n"); depmsg = 1; if (optarg != NULL) { switch (*optarg) { case 'd': case 'D': Facility = LOG_DAEMON; break; case 'i': case 'I': Facility = LOG_INFO; break; case '0': Facility = LOG_LOCAL0; break; case '1': Facility = LOG_LOCAL1; break; case '2': Facility = LOG_LOCAL2; break; case '3': Facility = LOG_LOCAL3; break; case '4': Facility = LOG_LOCAL4; break; case '5': Facility = LOG_LOCAL5; break; case '6': Facility = LOG_LOCAL6; break; case '7': Facility = LOG_LOCAL7; break; default: fprintf(stderr, "invalid syslog facility: -S%c\n",*optarg); usage(); exit(1); } } else { fprintf(stderr, "no syslog facility specified\n"); usage(); exit(1); } break; case 'm': if (optarg != NULL) { setenv("MIBS", optarg, 1); } else { usage(); exit(1); } break; case 'M': if (optarg != NULL) { setenv("MIBDIRS", optarg, 1); } else { usage(); exit(1); } break; case 'n': netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_APP_NUMERIC_IP, 1); break; case 'o': fprintf(stderr, "Warning: -o option is deprecated; use -Lf instead\n"); if (optarg != NULL) { logfile = optarg; snmp_enable_filelog(optarg, netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_APPEND_LOGFILES)); } else { usage(); exit(1); } break; case 'O': cp = snmp_out_toggle_options(optarg); if (cp != NULL) { fprintf(stderr, "Unknown output option passed to -O: %c\n", *cp); usage(); exit(1); } break; case 'L': if (snmp_log_options( optarg, argc, argv ) < 0 ) { usage(); exit(1); } break; case 'P': fprintf(stderr, "Warning: -P option is deprecated; use -f -Le instead\n"); dofork = 0; snmp_enable_stderrlog(); break; case 's': fprintf(stderr, "Warning: -s option is deprecated; use -Lsd instead\n"); depmsg = 1; #ifdef WIN32 snmp_enable_syslog_ident(app_name_long, Facility); #else snmp_enable_syslog_ident(app_name, Facility); #endif break; case 't': SyslogTrap++; break; #if HAVE_GETPID case 'u': fprintf(stderr, "Warning: -u option is deprecated; use -p instead\n"); case 'p': if (optarg != NULL) { parse_config_pidFile(NULL, optarg); } else { usage(); exit(1); } break; #endif case 'v': version(); exit(0); break; case 'x': if (optarg != NULL) { netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_X_SOCKET, optarg); } else { usage(); exit(1); } break; default: fprintf(stderr, "invalid option: -%c\n", arg); usage(); exit(1); break; } } if (optind < argc) { /* * There are optional transport addresses on the command line. */ for (i = optind; i < argc; i++) { char *astring; if (listen_ports != NULL) { astring = malloc(strlen(listen_ports) + 2 + strlen(argv[i])); if (astring == NULL) { fprintf(stderr, "malloc failure processing argv[%d]\n", i); exit(1); } sprintf(astring, "%s,%s", listen_ports, argv[i]); free(listen_ports); listen_ports = astring; } else { listen_ports = strdup(argv[i]); if (listen_ports == NULL) { fprintf(stderr, "malloc failure processing argv[%d]\n", i); exit(1); } } } } /* * I'm being lazy here, and not checking the * return value from these registration calls. * Don't try this at home, children! */ if (0 == snmp_get_do_logging()) { traph = netsnmp_add_global_traphandler(NETSNMPTRAPD_PRE_HANDLER, syslog_handler); traph->authtypes = TRAP_AUTH_LOG; } else { traph = netsnmp_add_global_traphandler(NETSNMPTRAPD_PRE_HANDLER, print_handler); traph->authtypes = TRAP_AUTH_LOG; } if (Event) { traph = netsnmp_add_traphandler(event_handler, risingAlarm, OID_LENGTH(risingAlarm)); traph->authtypes = TRAP_AUTH_LOG; traph = netsnmp_add_traphandler(event_handler, fallingAlarm, OID_LENGTH(fallingAlarm)); traph->authtypes = TRAP_AUTH_LOG; traph = netsnmp_add_traphandler(event_handler, unavailableAlarm, OID_LENGTH(unavailableAlarm)); traph->authtypes = TRAP_AUTH_LOG; /* XXX - might be worth setting some "magic data" * in the traphandler structure that 'event_handler' * can use to avoid checking the trap OID values. */ } #if defined(USING_AGENTX_SUBAGENT_MODULE) && !defined(SNMPTRAPD_DISABLE_AGENTX) /* * we're an agentx subagent? */ if (agentx_subagent) { /* * make us a agentx client. */ netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_ROLE, 1); } #endif /* * don't fail if we can't do agentx (ie, socket not there, or not root) */ netsnmp_ds_toggle_boolean(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_NO_ROOT_ACCESS); /* * ignore any warning messages. */ netsnmp_ds_toggle_boolean(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_NO_CONNECTION_WARNINGS); /* * initialize the agent library */ init_agent("snmptrapd"); #if defined(USING_AGENTX_SUBAGENT_MODULE) && !defined(SNMPTRAPD_DISABLE_AGENTX) /* * initialize local modules */ if (agentx_subagent) { #ifdef USING_SNMPV3_SNMPENGINE_MODULE extern void register_snmpEngine_scalars_context(const char *); #endif #ifdef USING_SNMPV3_USMUSER_MODULE extern void init_register_usmUser_context(const char *); #endif subagent_init(); #ifdef USING_NOTIFICATION_LOG_MIB_NOTIFICATION_LOG_MODULE /* register the notification log table */ if (should_init("notificationLogMib")) { netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_NOTIF_LOG_CTX, "snmptrapd"); traph = netsnmp_add_global_traphandler(NETSNMPTRAPD_POST_HANDLER, notification_handler); traph->authtypes = TRAP_AUTH_LOG; init_notification_log(); } #endif #ifdef USING_SNMPV3_SNMPENGINE_MODULE /* * register scalars from SNMP-FRAMEWORK-MIB::snmpEngineID group; * allows engineID probes via the master agent under the * snmptrapd context */ register_snmpEngine_scalars_context("snmptrapd"); #endif /* register our authorization handler */ init_netsnmp_trapd_auth(); #ifdef USING_SNMPV3_USMUSER_MODULE /* register ourselves as having a USM user database */ init_register_usmUser_context("snmptrapd"); #endif } #endif #ifdef NETSNMP_EMBEDDED_PERL init_perl(); { /* set the default path to load */ char init_file[SNMP_MAXBUF]; snprintf(init_file, sizeof(init_file) - 1, "%s/%s", SNMPSHAREPATH, "snmp_perl_trapd.pl"); netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_PERL_INIT_FILE, init_file); } #endif /* * Initialize the world. */ init_snmp("snmptrapd"); if (trap1_fmt_str_remember) { free_trap1_fmt(); free_trap2_fmt(); print_format1 = strdup(trap1_fmt_str_remember); print_format2 = strdup(trap1_fmt_str_remember); } if (netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_QUIT_IMMEDIATELY)) { /* * just starting up to process specific configuration and then * shutting down immediately. */ netsnmp_running = 0; } /* * if no logging options on command line or in conf files, use syslog */ if (0 == snmp_get_do_logging()) { #ifdef WIN32 snmp_enable_syslog_ident(app_name_long, Facility); #else snmp_enable_syslog_ident(app_name, Facility); #endif } #ifndef WIN32 /* * fork the process to the background if we are not printing to stderr */ if (dofork && netsnmp_running) { int fd; switch (fork()) { case -1: fprintf(stderr, "bad fork - %s\n", strerror(errno)); _exit(1); case 0: /* * become process group leader */ if (setsid() == -1) { fprintf(stderr, "bad setsid - %s\n", strerror(errno)); _exit(1); } /* * if we are forked, we don't want to print out to stdout or stderr */ fd = open("/dev/null", O_RDWR); dup2(fd, STDIN_FILENO); dup2(fd, STDOUT_FILENO); dup2(fd, STDERR_FILENO); close(fd); break; default: _exit(0); } } #endif /* WIN32 */ #if HAVE_GETPID if (pid_file != NULL) { if ((PID = fopen(pid_file, "w")) == NULL) { snmp_log_perror("fopen"); exit(1); } fprintf(PID, "%d\n", (int) getpid()); fclose(PID); free_config_pidFile(); } #endif snmp_log(LOG_INFO, "NET-SNMP version %s\n", netsnmp_get_version()); if (depmsg) { snmp_log(LOG_WARNING, "-s and -S options are deprecated; use -Ls instead\n"); } SOCK_STARTUP; if (listen_ports) cp = listen_ports; else cp = default_port; while (cp != NULL) { char *sep = strchr(cp, ','); char listen_name[128]; char *cp2 = strchr(cp, ':'); if (sep != NULL) { *sep = 0; } /* * Make sure this defaults to listening on port 162 */ if (!cp2) { snprintf(listen_name, sizeof(listen_name), "%s:162", cp); cp2 = listen_name; } else { cp2 = cp; } transport = netsnmp_tdomain_transport(cp2, 1, "udp"); if (transport == NULL) { snmp_log(LOG_ERR, "couldn't open %s -- errno %d (\"%s\")\n", cp2, errno, strerror(errno)); snmptrapd_close_sessions(sess_list); SOCK_CLEANUP; exit(1); } else { ss = snmptrapd_add_session(transport); if (ss == NULL) { /* * Shouldn't happen? We have already opened the transport * successfully so what could have gone wrong? */ snmptrapd_close_sessions(sess_list); netsnmp_transport_free(transport); snmp_log(LOG_ERR, "couldn't open snmp - %m"); SOCK_CLEANUP; exit(1); } else { ss->next = sess_list; sess_list = ss; } } /* * Process next listen address, if there is one. */ if (sep != NULL) { *sep = ','; cp = sep + 1; } else { cp = NULL; } } /* * ignore early sighup during startup */ reconfig = 0; #ifdef WIN32SERVICE trapd_status = SNMPTRAPD_RUNNING; #endif while (netsnmp_running) { if (reconfig) { /* * If we are logging to a file, receipt of SIGHUP also * indicates the the log file should be closed and * re-opened. This is useful for users that want to * rotate logs in a more predictable manner. */ netsnmp_logging_restart(); snmp_log(LOG_INFO, "NET-SNMP version %s restarted\n", netsnmp_get_version()); trapd_update_config(); if (trap1_fmt_str_remember) { free_trap1_fmt(); print_format1 = strdup(trap1_fmt_str_remember); } reconfig = 0; } numfds = 0; FD_ZERO(&readfds); FD_ZERO(&writefds); FD_ZERO(&exceptfds); block = 0; tvp = &timeout; timerclear(tvp); tvp->tv_sec = 5; snmp_select_info(&numfds, &readfds, tvp, &block); if (block == 1) tvp = NULL; /* block without timeout */ netsnmp_external_event_info(&numfds, &readfds, &writefds, &exceptfds); count = select(numfds, &readfds, &writefds, &exceptfds, tvp); gettimeofday(&Now, 0); if (count > 0) { netsnmp_dispatch_external_events(&count, &readfds, &writefds, &exceptfds); /* If there are any more events after external events, then * try SNMP events. */ if (count > 0) { snmp_read(&readfds); } } else switch (count) { case 0: snmp_timeout(); break; case -1: if (errno == EINTR) continue; snmp_log_perror("select"); netsnmp_running = 0; break; default: fprintf(stderr, "select returned %d\n", count); netsnmp_running = 0; } run_alarms(); } if (snmp_get_do_logging()) { struct tm *tm; time_t timer; time(&timer); tm = localtime(&timer); snmp_log(LOG_INFO, "%.4d-%.2d-%.2d %.2d:%.2d:%.2d NET-SNMP version %s Stopped.\n", tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, netsnmp_get_version()); } snmp_log(LOG_INFO, "Stopping snmptrapd"); snmptrapd_close_sessions(sess_list); snmp_shutdown("snmptrapd"); #ifdef WIN32SERVICE trapd_status = SNMPTRAPD_STOPPED; #endif snmp_disable_log(); SOCK_CLEANUP; return 0; } /* * Read the configuration files. Implemented as a signal handler so that * receipt of SIGHUP will cause configuration to be re-read when the * trap daemon is running detatched from the console. * */ void trapd_update_config(void) { free_config(); vacm_standard_views(0,0,NULL,NULL); read_configs(); } #if !defined(HAVE_GETDTABLESIZE) && !defined(WIN32) #include int getdtablesize(void) { struct rlimit rl; getrlimit(RLIMIT_NOFILE, &rl); return (rl.rlim_cur); } #endif /* * Windows Service Related functions */ #ifdef WIN32SERVICE /************************************************************ * main function for Windows * Parse command line arguments for startup options, * to start as service or console mode application in windows. * Invokes appropriate startup functions depending on the * parameters passed *************************************************************/ int __cdecl _tmain(int argc, TCHAR * argv[]) { /* * Define Service Name and Description, which appears in windows SCM */ LPCTSTR lpszServiceName = app_name_long; /* Service Registry Name */ LPCTSTR lpszServiceDisplayName = _T("Net-SNMP Trap Handler"); /* Display Name */ LPCTSTR lpszServiceDescription = #ifdef IFDESCR _T("SNMPv2c / SNMPv3 trap/inform receiver from Net-SNMP. Supports MIB objects for IP,ICMP,TCP,UDP, and network interface sub-layers."); #else _T("SNMPv2c / SNMPv3 trap/inform receiver from Net-SNMP"); #endif InputParams InputOptions; int nRunType = RUN_AS_CONSOLE; int quiet = 0; nRunType = ParseCmdLineForServiceOption(argc, argv, &quiet); switch (nRunType) { case REGISTER_SERVICE: /* * Register As service */ InputOptions.Argc = argc; InputOptions.Argv = argv; exit (RegisterService(lpszServiceName, lpszServiceDisplayName, lpszServiceDescription, &InputOptions, quiet)); break; case UN_REGISTER_SERVICE: /* * Unregister service */ exit (UnregisterService(lpszServiceName, quiet)); exit(0); break; case RUN_AS_SERVICE: /* * Run as service */ /* * Register Stop Function */ RegisterStopFunction(StopSnmpTrapd); return RunAsService(SnmpTrapdMain); break; default: /* * Run in console mode */ return SnmpTrapdMain(argc, argv); break; } } /* * To stop Snmp Trap Receiver daemon * This portion is still not working */ void StopSnmpTrapd(void) { /* * Shut Down Service */ term_handler(1); /* * Wait till trap receiver is completely stopped */ while (trapd_status != SNMPTRAPD_STOPPED) { Sleep(100); } } #endif /*WIN32SERVICE*/