static void
setup_log(int restart, int dont_zero, int stderr_log, int syslog_log,
char *logfile)
{
static char logfile_s[PATH_MAX + 1] = { 0 };
static int dont_zero_s = 0;
static int stderr_log_s = 0;
static int syslog_log_s = 0;
if (restart == 0) {
if (logfile != NULL) {
strncpy(logfile_s, logfile, PATH_MAX);
}
dont_zero_s = dont_zero;
stderr_log_s = stderr_log;
syslog_log_s = syslog_log;
}
if (stderr_log_s) {
snmp_enable_stderrlog();
} else {
snmp_disable_stderrlog();
}
if (logfile_s[0]) {
snmp_enable_filelog(logfile_s, dont_zero_s);
}
if (syslog_log_s) {
snmp_enable_syslog_ident("snmpd", Facility);
}
}
static void init_snmp_subagent(const char *agentx_host, int agentx_port)
{
char agentx_socket[128];
int background = 1; /* change this if you want to run in the background */
int syslog = 0; /* change this if you want to use syslog */
snmp_enable_filelog("/var/log/exa_agentx.log", 1);
snmp_log(LOG_INFO, "exa_agentx configured to connect to %s:%d\n",
agentx_host, agentx_port);
/* we're in an agentx subagent */
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_ROLE, 1);
sprintf(agentx_socket, "tcp:%s:%d", agentx_host, agentx_port);
netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_X_SOCKET, agentx_socket);
/* run in background, if requested */
if (background && netsnmp_daemonize(1, !syslog))
exit(1);
snmp_log(LOG_INFO, "exa_agentx daemonized\n");
/* initialize tcpip, if necessary */
SOCK_STARTUP;
/* initialize the agent library */
init_agent("exa_agentx");
/* initialize mib code here */
/* mib code: init_nstAgentSubagentObject from nstAgentSubagentObject.C */
/* not necessary to just send TRAPs !! */
/* init_mib_int_watch(); */
/* example-demon will be used to read example-demon.conf files. */
init_snmp("exa_agentx");
/* In case we recevie a request to stop (kill -TERM or kill -INT) */
stop = false;
signal(SIGTERM, stop_server);
signal(SIGINT, stop_server);
snmp_log(LOG_INFO, "exa_agentx is up and running.\n");
}
/*
* dummy1 used to be stderr_log, but that was never set. So, ignore the
* value here, instead of always disabling stderr logging (which might
* have been set up using the new log handler methods).
*/
static void
setup_log(int restart, int dont_zero, int dummy1, int syslog_log,
char *logfile)
{
static char logfile_s[PATH_MAX + 1] = { 0 };
static int dont_zero_s = 0;
static int syslog_log_s = 0;
if (restart == 0) {
if (logfile != NULL) {
strncpy(logfile_s, logfile, PATH_MAX);
}
dont_zero_s = dont_zero;
syslog_log_s = syslog_log;
}
if (logfile_s[0]) {
snmp_enable_filelog(logfile_s, dont_zero_s);
}
if (syslog_log_s) {
snmp_enable_syslog_ident(app_name, Facility);
}
}
main(int argc, char *argv[])
#endif
{
char options[128] = "aAc:CdD::fhHI:l:L:m:M:n:p:P:qrsS:UvV-:Y:";
int arg, i, ret;
int dont_fork = 0, do_help = 0;
int log_set = 0;
int agent_mode = -1;
char *pid_file = NULL;
char option_compatability[] = "-Le";
#ifndef WIN32
int prepared_sockets = 0;
#endif
#if HAVE_GETPID
int fd;
FILE *PID;
#endif
#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 /* NETSNMP_NO_SYSTEMD */
/*
* close all non-standard file descriptors we may have
* inherited from the shell.
*/
if (!prepared_sockets) {
for (i = getdtablesize() - 1; i > 2; --i) {
(void) close(i);
}
}
#endif /* #WIN32 */
/*
* register signals ASAP to prevent default action (usually core)
* for signals during startup...
*/
#ifdef SIGTERM
DEBUGMSGTL(("signal", "registering SIGTERM signal handler\n"));
signal(SIGTERM, SnmpdShutDown);
#endif
#ifdef SIGINT
DEBUGMSGTL(("signal", "registering SIGINT signal handler\n"));
signal(SIGINT, SnmpdShutDown);
#endif
#ifdef SIGHUP
signal(SIGHUP, SIG_IGN); /* do not terminate on early SIGHUP */
#endif
#ifdef SIGUSR1
DEBUGMSGTL(("signal", "registering SIGUSR1 signal handler\n"));
signal(SIGUSR1, SnmpdDump);
#endif
#ifdef SIGPIPE
DEBUGMSGTL(("signal", "registering SIGPIPE signal handler\n"));
signal(SIGPIPE, SIG_IGN); /* 'Inline' failure of wayward readers */
#endif
#ifdef SIGXFSZ
signal(SIGXFSZ, SnmpdCatchRandomSignal);
#endif
#ifdef NETSNMP_NO_ROOT_ACCESS
/*
* Default to no.
*/
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS, 1);
#endif
/*
* Default to NOT running an AgentX master.
*/
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_AGENTX_MASTER, 0);
netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_AGENTX_TIMEOUT, -1);
netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_AGENTX_RETRIES, -1);
netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_CACHE_TIMEOUT, 5);
/*
* Add some options if they are available.
*/
#if HAVE_UNISTD_H
strcat(options, "g:u:");
#endif
#if defined(USING_AGENTX_SUBAGENT_MODULE)|| defined(USING_AGENTX_MASTER_MODULE)
strcat(options, "x:");
#endif
#ifdef USING_AGENTX_SUBAGENT_MODULE
strcat(options, "X");
#endif
/*
* This is incredibly ugly, but it's probably the simplest way
* to handle the old '-L' option as well as the new '-Lx' style
*/
for (i=0; i<argc; i++) {
if (!strcmp(argv[i], "-L"))
argv[i] = option_compatability;
}
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG
#ifdef WIN32
snmp_log_syslogname(app_name_long);
#else
snmp_log_syslogname(app_name);
#endif
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG */
netsnmp_ds_set_string(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_APPTYPE, app_name);
/*
* Now process options normally.
*/
while ((arg = getopt(argc, argv, options)) != EOF) {
switch (arg) {
case '-':
if (strcasecmp(optarg, "help") == 0) {
usage(argv[0]);
}
if (strcasecmp(optarg, "version") == 0) {
version();
}
handle_long_opt(optarg);
break;
case 'a':
log_addresses++;
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(argv[0]);
}
break;
case 'C':
netsnmp_ds_set_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_DONT_READ_CONFIGS, 1);
break;
case 'd':
netsnmp_ds_set_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_DUMP_PACKET,
++snmp_dump_packet);
break;
case 'D':
debug_register_tokens(optarg);
snmp_set_do_debugging(1);
break;
case 'f':
dont_fork = 1;
break;
#if HAVE_UNISTD_H
case 'g':
if (optarg != NULL) {
char *ecp;
int gid;
gid = strtoul(optarg, &ecp, 10);
#if HAVE_GETGRNAM && HAVE_PWD_H
if (*ecp) {
struct group *info;
info = getgrnam(optarg);
gid = info ? info->gr_gid : -1;
endgrent();
}
#endif
if (gid < 0) {
fprintf(stderr, "Bad group id: %s\n", optarg);
exit(1);
}
netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_GROUPID, gid);
} else {
usage(argv[0]);
}
break;
#endif
case 'h':
usage(argv[0]);
break;
case 'H':
do_help = 1;
break;
case 'I':
if (optarg != NULL) {
add_to_init_list(optarg);
} else {
usage(argv[0]);
}
break;
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_FILE
case 'l':
printf("Warning: -l option is deprecated, use -Lf <file> instead\n");
if (optarg != NULL) {
if (strlen(optarg) > PATH_MAX) {
fprintf(stderr,
"%s: logfile path too long (limit %d chars)\n",
argv[0], PATH_MAX);
exit(1);
}
snmp_enable_filelog(optarg,
netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_APPEND_LOGFILES));
log_set = 1;
} else {
usage(argv[0]);
}
break;
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_FILE */
case 'L':
if (snmp_log_options( optarg, argc, argv ) < 0 ) {
usage(argv[0]);
}
log_set = 1;
break;
case 'm':
if (optarg != NULL) {
setenv("MIBS", optarg, 1);
} else {
usage(argv[0]);
}
break;
case 'M':
if (optarg != NULL) {
setenv("MIBDIRS", optarg, 1);
} else {
usage(argv[0]);
}
break;
case 'n':
if (optarg != NULL) {
app_name = optarg;
netsnmp_ds_set_string(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_APPTYPE, app_name);
} else {
usage(argv[0]);
}
break;
case 'P':
printf("Warning: -P option is deprecated, use -p instead\n");
case 'p':
if (optarg != NULL) {
pid_file = optarg;
} else {
usage(argv[0]);
}
break;
case 'q':
netsnmp_ds_set_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_QUICK_PRINT, 1);
break;
case 'r':
netsnmp_ds_toggle_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS);
break;
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG
case 's':
printf("Warning: -s option is deprecated, use -Lsd instead\n");
snmp_enable_syslog();
log_set = 1;
break;
case 'S':
printf("Warning: -S option is deprecated, use -Ls <facility> instead\n");
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(argv[0]);
}
snmp_enable_syslog_ident(snmp_log_syslogname(NULL), Facility);
log_set = 1;
} else {
fprintf(stderr, "no syslog facility specified\n");
usage(argv[0]);
}
break;
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG */
case 'U':
netsnmp_ds_toggle_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_LEAVE_PIDFILE);
break;
#if HAVE_UNISTD_H
case 'u':
if (optarg != NULL) {
char *ecp;
int uid;
uid = strtoul(optarg, &ecp, 10);
#if HAVE_GETPWNAM && HAVE_PWD_H
if (*ecp) {
struct passwd *info;
info = getpwnam(optarg);
uid = info ? info->pw_uid : -1;
endpwent();
}
#endif
if (uid < 0) {
fprintf(stderr, "Bad user id: %s\n", optarg);
exit(1);
}
netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_USERID, uid);
} else {
usage(argv[0]);
}
break;
#endif
case 'v':
version();
case 'V':
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_VERBOSE, 1);
break;
#if defined(USING_AGENTX_SUBAGENT_MODULE)|| defined(USING_AGENTX_MASTER_MODULE)
case 'x':
if (optarg != NULL) {
netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_X_SOCKET, optarg);
} else {
usage(argv[0]);
}
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_AGENTX_MASTER, 1);
break;
#endif
case 'X':
#if defined(USING_AGENTX_SUBAGENT_MODULE)
agent_mode = SUB_AGENT;
#else
fprintf(stderr, "%s: Illegal argument -X:"
"AgentX support not compiled in.\n", argv[0]);
usage(argv[0]);
exit(1);
#endif
break;
case 'Y':
netsnmp_config_remember(optarg);
break;
default:
usage(argv[0]);
break;
}
}
if (do_help) {
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS, 1);
init_agent(app_name); /* register our .conf handlers */
init_mib_modules();
init_snmp(app_name);
fprintf(stderr, "Configuration directives understood:\n");
read_config_print_usage(" ");
exit(0);
}
if (optind < argc) {
#ifndef NETSNMP_NO_LISTEN_SUPPORT
/*
* There are optional transport addresses on the command line.
*/
DEBUGMSGTL(("snmpd/main", "optind %d, argc %d\n", optind, argc));
for (i = optind; i < argc; i++) {
char *c, *astring;
if ((c = netsnmp_ds_get_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_PORTS))) {
astring = (char*)malloc(strlen(c) + 2 + strlen(argv[i]));
if (astring == NULL) {
fprintf(stderr, "malloc failure processing argv[%d]\n", i);
exit(1);
}
sprintf(astring, "%s,%s", c, argv[i]);
netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_PORTS, astring);
SNMP_FREE(astring);
} else {
netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_PORTS, argv[i]);
}
}
DEBUGMSGTL(("snmpd/main", "port spec: %s\n",
netsnmp_ds_get_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_PORTS)));
#else /* NETSNMP_NO_LISTEN_SUPPORT */
fprintf(stderr, "You specified ports to open; this agent was built to only send notifications\n");
exit(1);
#endif /* NETSNMP_NO_LISTEN_SUPPORT */
}
#ifdef NETSNMP_LOGFILE
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_FILE
if (0 == log_set)
snmp_enable_filelog(NETSNMP_LOGFILE,
netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_APPEND_LOGFILES));
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_FILE */
#endif
#ifdef USING_UTIL_FUNCS_RESTART_MODULE
{
/*
* Initialize a argv set to the current for restarting the agent.
*/
char *cptr, **argvptr;
argvrestartp = (char **)malloc((argc + 2) * sizeof(char *));
argvptr = argvrestartp;
for (i = 0, ret = 1; i < argc; i++) {
ret += strlen(argv[i]) + 1;
}
argvrestart = (char *) malloc(ret);
argvrestartname = (char *) malloc(strlen(argv[0]) + 1);
if (!argvrestartp || !argvrestart || !argvrestartname) {
fprintf(stderr, "malloc failure processing argvrestart\n");
exit(1);
}
strcpy(argvrestartname, argv[0]);
for (cptr = argvrestart, i = 0; i < argc; i++) {
strcpy(cptr, argv[i]);
*(argvptr++) = cptr;
cptr += strlen(argv[i]) + 1;
}
}
#endif /* USING_UTIL_FUNCS_RESTART_MODULE */
if (agent_mode == -1) {
if (strstr(argv[0], "agentxd") != NULL) {
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_ROLE, SUB_AGENT);
} else {
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_ROLE, MASTER_AGENT);
}
} else {
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_ROLE, agent_mode);
}
SOCK_STARTUP;
if (init_agent(app_name) != 0) {
snmp_log(LOG_ERR, "Agent initialization failed\n");
exit(1);
}
init_mib_modules();
/*
* start library
*/
init_snmp(app_name);
if ((ret = init_master_agent()) != 0) {
/*
* Some error opening one of the specified agent transports.
*/
snmp_log(LOG_ERR, "Server Exiting with code 1\n");
exit(1);
}
/*
* Initialize the world. Detach from the shell. Create initial user.
*/
if(!dont_fork) {
int quit = ! netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_QUIT_IMMEDIATELY);
ret = netsnmp_daemonize(quit,
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_STDIO
snmp_stderrlog_status()
#else /* NETSNMP_FEATURE_REMOVE_LOGGING_STDIO */
0
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_STDIO */
);
/*
* xxx-rks: do we care if fork fails? I think we should...
*/
if(ret != 0) {
snmp_log(LOG_ERR, "Server Exiting with code 1\n");
exit(1);
}
}
#if HAVE_GETPID
if (pid_file != NULL) {
/*
* unlink the pid_file, if it exists, prior to open. Without
* doing this the open will fail if the user specified pid_file
* already exists.
*/
unlink(pid_file);
fd = open(pid_file, O_CREAT | O_EXCL | O_WRONLY, 0600);
if (fd == -1) {
snmp_log_perror(pid_file);
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
exit(1);
}
} else {
if ((PID = fdopen(fd, "w")) == NULL) {
snmp_log_perror(pid_file);
exit(1);
} else {
fprintf(PID, "%d\n", (int) getpid());
fclose(PID);
}
#ifndef _MSC_VER
/* The sequence open()/fdopen()/fclose()/close() makes MSVC crash,
hence skip the close() call when using the MSVC runtime. */
close(fd);
#endif
}
}
#endif
#if defined(HAVE_UNISTD_H) && (defined(HAVE_CHOWN) || defined(HAVE_SETGID) || defined(HAVE_SETUID))
{
const char *persistent_dir;
int uid, gid;
persistent_dir = get_persistent_directory();
mkdirhier( persistent_dir, NETSNMP_AGENT_DIRECTORY_MODE, 0 );
uid = netsnmp_ds_get_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_USERID);
gid = netsnmp_ds_get_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_GROUPID);
#ifdef HAVE_CHOWN
if ( uid != 0 || gid != 0 )
chown( persistent_dir, uid, gid );
#endif
#ifdef HAVE_SETGID
if ((gid = netsnmp_ds_get_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_GROUPID)) > 0) {
DEBUGMSGTL(("snmpd/main", "Changing gid to %d.\n", gid));
if (setgid(gid) == -1
#ifdef HAVE_SETGROUPS
|| setgroups(1, (gid_t *)&gid) == -1
#endif
) {
snmp_log_perror("setgid failed");
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
exit(1);
}
}
}
#endif
#ifdef HAVE_SETUID
if ((uid = netsnmp_ds_get_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_USERID)) > 0) {
#if HAVE_GETPWNAM && HAVE_PWD_H && HAVE_INITGROUPS
struct passwd *info;
/*
* Set supplementary groups before changing UID
* (which probably involves giving up privileges)
*/
info = getpwuid(uid);
if (info) {
DEBUGMSGTL(("snmpd/main", "Supplementary groups for %s.\n", info->pw_name));
if (initgroups(info->pw_name, (gid != 0 ? (gid_t)gid : info->pw_gid)) == -1) {
snmp_log_perror("initgroups failed");
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
exit(1);
}
}
}
endpwent();
#endif
DEBUGMSGTL(("snmpd/main", "Changing uid to %d.\n", uid));
if (setuid(uid) == -1) {
snmp_log_perror("setuid failed");
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
exit(1);
}
}
}
#endif
}
#endif
/*
* Store persistent data immediately in case we crash later.
*/
snmp_store(app_name);
#ifdef SIGHUP
DEBUGMSGTL(("signal", "registering SIGHUP signal handler\n"));
signal(SIGHUP, SnmpdReconfig);
#endif
/*
* Send coldstart trap if possible.
*/
send_easy_trap(0, 0);
/*
* We're up, log our version number.
*/
snmp_log(LOG_INFO, "NET-SNMP version %s\n", netsnmp_get_version());
#ifdef WIN32SERVICE
agent_status = AGENT_RUNNING;
#endif
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"));
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_QUIT_IMMEDIATELY))
receive();
DEBUGMSGTL(("snmpd/main", "sending shutdown trap\n"));
SnmpTrapNodeDown();
DEBUGMSGTL(("snmpd/main", "Bye...\n"));
snmp_shutdown(app_name);
shutdown_master_agent();
shutdown_agent();
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_LEAVE_PIDFILE) &&
(pid_file != NULL)) {
unlink(pid_file);
}
#ifdef WIN32SERVICE
agent_status = AGENT_STOPPED;
#endif
#ifdef USING_UTIL_FUNCS_RESTART_MODULE
SNMP_FREE(argvrestartname);
SNMP_FREE(argvrestart);
SNMP_FREE(argvrestartp);
#endif /* USING_UTIL_FUNCS_RESTART_MODULE */
SOCK_CLEANUP;
return 0;
} /* End main() -- snmpd */
static int send_snmp_inform_or_trap(const GpErrorData * errorData, const char * subject, const char * severity)
{
netsnmp_session session, *ss = NULL;
netsnmp_pdu *pdu, *response;
int status;
char csysuptime[20];
static bool snmp_initialized = false;
static char myhostname[255]; /* gethostname usually is limited to 65 chars out, but make this big to be safe */
char *rawstring = NULL;
List *elemlist = NIL;
ListCell *l = NULL;
/*
* "inform" messages get a positive acknowledgement response from the SNMP manager.
* If it doesn't come, the message might be resent.
*
* "trap" messages are one-way, and we have no idea if the manager received it.
* But, it's faster and cheaper, and no need to retry. So some people might prefer it.
*/
bool inform = strcmp(gp_snmp_use_inform_or_trap,"inform") == 0;
if (gp_snmp_monitor_address == NULL || gp_snmp_monitor_address[0] == '\0')
{
static bool firsttime = 1;
ereport(firsttime ? LOG : DEBUG1,(errmsg("SNMP inform/trap alerts are disabled")));
firsttime = false;
return -1;
}
/*
* SNMP managers are required to handle messages up to at least 484 bytes long, but I believe most existing
* managers support messages up to one packet (ethernet frame) in size, 1472 bytes.
*
* But, should we take that chance? Or play it safe and limit the message to 484 bytes?
*/
elog(DEBUG2,"send_snmp_inform_or_trap");
if (!snmp_initialized)
{
snmp_enable_stderrlog();
if (gp_snmp_debug_log != NULL && gp_snmp_debug_log[0] != '\0')
{
snmp_enable_filelog(gp_snmp_debug_log, 1);
//debug_register_tokens("ALL");
snmp_set_do_debugging(1);
}
/*
* Initialize the SNMP library. This also reads the MIB database.
*/
/* Add GPDB-MIB to the list to be loaded */
putenv("MIBS=+GPDB-MIB:SNMP-FRAMEWORK-MIB:SNMPv2-CONF:SNMPv2-TC:SNMPv2-TC");
init_snmp("sendalert");
snmp_initialized = true;
{
char portnum[16];
myhostname[0] = '\0';
if (gethostname(myhostname, sizeof(myhostname)) == 0)
{
strcat(myhostname,":");
pg_ltoa(PostPortNumber,portnum);
strcat(myhostname,portnum);
}
}
}
/*
* Trap/Inform messages always start with the system up time. (SysUpTime.0)
*
* This presumably would be the uptime of GPDB, not the machine it is running on, I think.
*
* Use Postmaster's "MyStartTime" as a way to get that.
*/
sprintf(csysuptime, "%ld", (long)(time(NULL) - MyStartTime));
/*
// ERRCODE_DISK_FULL could be reported vi rbmsMIB rdbmsTraps rdbmsOutOfSpace trap.
// But it appears we never generate that error?
// ERRCODE_ADMIN_SHUTDOWN means SysAdmin aborted somebody's request. Not interesting?
// ERRCODE_CRASH_SHUTDOWN sounds interesting, but I don't see that we ever generate it.
// ERRCODE_CANNOT_CONNECT_NOW means we are starting up, shutting down, in recovery, or Too many users are logged on.
// abnormal database system shutdown
*/
/*
* The gpdbAlertSeverity is a crude attempt to classify some of these messages based on severity,
* where OK means everything is running normal, Down means everything is shut down, degraded would be
* for times when some segments are down, but the system is up, The others are maybe useful in the future
*
* gpdbSevUnknown(0),
* gpdbSevOk(1),
* gpdbSevWarning(2),
* gpdbSevError(3),
* gpdbSevFatal(4),
* gpdbSevPanic(5),
* gpdbSevSystemDegraded(6),
* gpdbSevSystemDown(7)
*/
char detail[MAX_ALERT_STRING+1];
snprintf(detail, MAX_ALERT_STRING, "%s", errorData->error_detail);
detail[127] = '\0';
char sqlstmt[MAX_ALERT_STRING+1];
char * sqlstmtp = errorData->debug_query_string;
if (sqlstmtp == NULL || sqlstmtp[0] == '\0')
sqlstmtp = errorData->internal_query;
if (sqlstmtp == NULL)
sqlstmtp = "";
snprintf(sqlstmt, MAX_ALERT_STRING, "%s", sqlstmtp);
sqlstmt[MAX_ALERT_STRING] = '\0';
/* Need a modifiable copy of To list */
rawstring = pstrdup(gp_snmp_monitor_address);
/* Parse string into list of identifiers */
if (!SplitMailString(rawstring, ',', &elemlist))
{
/* syntax error in list */
ereport(LOG,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("invalid list syntax for \"gp_snmp_monitor_address\"")));
return -1;
}
/*
* This session is just a template, and doesn't need to be connected.
* It is used by snmp_add(), which copies this info, opens the new session, and assigns the transport.
*/
snmp_sess_init( &session ); /* Initialize session to default values */
session.version = SNMP_VERSION_2c;
session.timeout = SNMP_DEFAULT_TIMEOUT;
session.retries = SNMP_DEFAULT_RETRIES;
session.remote_port = 162; // I think this isn't used by net-snmp any more.
/*if (strchr(session.peername,':')==NULL)
strcat(session.peername,":162");*/
session.community = (u_char *)gp_snmp_community;
session.community_len = strlen((const char *)session.community); // SNMP_DEFAULT_COMMUNITY_LEN means "public"
session.callback_magic = NULL;
foreach(l, elemlist)
{
char *cur_gp_snmp_monitor_address = (char *) lfirst(l);
if (cur_gp_snmp_monitor_address == NULL || cur_gp_snmp_monitor_address[0] == '\0')
continue;
session.peername = cur_gp_snmp_monitor_address;
/*
* If we try to "snmp_open( &session )", net-snmp will set up a connection to that
* endpoint on port 161, assuming we are the network monitor, and the other side is an agent.
*
* But we are pretending to be an agent, sending traps to the NM, so we don't need this.
*/
/*if (!snmp_open( &session )) // Don't open the session here!
{
const char *str;
int xerr;
xerr = snmp_errno;
str = snmp_api_errstring(xerr);
elog(LOG, "snmp_open: %s", str);
return -1;
}*/
/*
* This call copies the info from "session" to "ss", assigns the transport, and opens the session.
* We must specify "snmptrap" so the transport will know we want port 162 by default.
*/
ss = snmp_add(&session,
netsnmp_transport_open_client("snmptrap", cur_gp_snmp_monitor_address),
NULL, NULL);
if (ss == NULL) {
/*
* diagnose netsnmp_transport_open_client and snmp_add errors with
* the input netsnmp_session pointer
*/
{
char *err;
snmp_error(&session, NULL, NULL, &err);
elog(LOG, "send_alert snmp_add of %s failed: %s", cur_gp_snmp_monitor_address, err);
free(err);
}
return -1;
}
/*
* We need to create the pdu each time, as it gets freed when we send a trap.
*/
pdu = snmp_pdu_create(inform ? SNMP_MSG_INFORM : SNMP_MSG_TRAP2);
if (!pdu)
{
const char *str;
int xerr;
xerr = snmp_errno;
str = snmp_api_errstring(xerr);
elog(LOG, "Failed to create notification PDU: %s", str);
return -1;
}
/*
* Trap/Inform messages always start with the system up time. (SysUpTime.0)
* We use Postmaster's "MyStartTime" as a way to get that.
*/
snmp_add_var(pdu, objid_sysuptime,
sizeof(objid_sysuptime) / sizeof(oid),
't', (const char *)csysuptime);
#if 0
/*
* In the future, we might want to send RDBMS-MIB::rdbmsStateChange when the system becomes unavailable or
* partially unavailable. This code, which is not currently used, shows how to build the pdu for
* that trap.
*/
/* {iso(1) identified-organization(3) dod(6) internet(1) mgmt(2) mib-2(1) rdbmsMIB(39) rdbmsTraps(2) rdbmsStateChange(1)} */
snmp_add_var(pdu, objid_snmptrap,
sizeof(objid_snmptrap) / sizeof(oid),
'o', "1.3.6.1.2.1.39.2.1"); // rdbmsStateChange
snmp_add_var(pdu, objid_rdbmsrelstate,
sizeof(objid_rdbmsrelstate) / sizeof(oid),
'i', "5"); // 4 = restricted, 5 = unavailable
#endif
/* {iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprises(1) gpdbMIB(31327) gpdbTraps(5) gpdbTrapsList(0) gpdbAlert(1)} */
/*
* We could specify this trap oid by name, rather than numeric oid, but then if the GPDB-MIB wasn't
* found, we'd get an error. Using the numeric oid means we can still work without the MIB loaded.
*/
snmp_add_var(pdu, objid_snmptrap,
sizeof(objid_snmptrap) / sizeof(oid),
'o', "1.3.6.1.4.1.31327.5.0.1"); // gpdbAlert
snmp_add_var(pdu, objid_gpdbAlertMsg,
sizeof(objid_gpdbAlertMsg) / sizeof(oid),
's', subject); // SnmpAdminString = UTF-8 text
snmp_add_var(pdu, objid_gpdbAlertSeverity,
sizeof(objid_gpdbAlertSeverity) / sizeof(oid),
'i', (char *)severity);
snmp_add_var(pdu, objid_gpdbAlertSqlstate,
sizeof(objid_gpdbAlertSqlstate) / sizeof(oid),
's', errorData->sql_state);
snmp_add_var(pdu, objid_gpdbAlertDetail,
sizeof(objid_gpdbAlertDetail) / sizeof(oid),
's', detail); // SnmpAdminString = UTF-8 text
snmp_add_var(pdu, objid_gpdbAlertSqlStmt,
sizeof(objid_gpdbAlertSqlStmt) / sizeof(oid),
's', sqlstmt); // SnmpAdminString = UTF-8 text
snmp_add_var(pdu, objid_gpdbAlertSystemName,
sizeof(objid_gpdbAlertSystemName) / sizeof(oid),
's', myhostname); // SnmpAdminString = UTF-8 text
elog(DEBUG2,"ready to send to %s",cur_gp_snmp_monitor_address);
if (inform)
status = snmp_synch_response(ss, pdu, &response);
else
status = snmp_send(ss, pdu) == 0;
elog(DEBUG2,"send, status %d",status);
if (status != STAT_SUCCESS)
{
/* Something went wrong */
if (ss)
{
char *err;
snmp_error(ss, NULL, NULL, &err);
elog(LOG, "sendalert failed to send %s: %s", inform ? "inform" : "trap", err);
free(err);
}
else
{
elog(LOG, "sendalert failed to send %s: %s", inform ? "inform" : "trap", "Something went wrong");
}
if (!inform)
snmp_free_pdu(pdu);
}
else if (inform)
snmp_free_pdu(response);
snmp_close(ss);
ss = NULL;
}
main(int argc, char *argv[])
#endif
{
char options[128] = "aAc:CdD::efF:g:hHI:L:m:M:no:O:PqsS:tu:vx:-:";
netsnmp_session *sess_list = NULL, *ss = NULL;
netsnmp_transport *transport = NULL;
int arg, i = 0, depmsg = 0;
int uid = 0, gid = 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(NETSNMP_SNMPTRAPD_DISABLE_AGENTX)
int agentx_subagent = 1;
#endif
netsnmp_trapd_handler *traph;
#ifdef NETSNMP_EMBEDDED_PERL
extern void init_perl(void);
#endif
#ifndef WIN32
/*
* close all non-standard file descriptors we may have
* inherited from the shell.
*/
for (i = getdtablesize() - 1; i > 2; --i) {
(void) close(i);
}
#endif /* #WIN32 */
#ifdef SIGTERM
signal(SIGTERM, term_handler);
#endif
#ifdef SIGHUP
signal(SIGHUP, SIG_IGN); /* do not terminate on early SIGHUP */
#endif
#ifdef SIGINT
signal(SIGINT, term_handler);
#endif
#ifdef SIGPIPE
signal(SIGPIPE, SIG_IGN); /* 'Inline' failure of wayward readers */
#endif
#ifdef SIGHUP
signal(SIGHUP, SIG_IGN); /* do not terminate on early SIGHUP */
#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
#ifdef HAVE_UNISTD_H
register_config_handler("snmptrapd", "agentuser",
parse_config_agentuser, NULL, "userid");
register_config_handler("snmptrapd", "agentgroup",
parse_config_agentgroup, NULL, "groupid");
#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:");
#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;
#if HAVE_UNISTD_H
case 'g':
if (optarg != NULL) {
netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_GROUPID, gid = atoi(optarg));
} else {
usage();
exit(1);
}
break;
#endif
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 <facility> 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 <file> 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;
#if HAVE_GETPID
case 'p':
if (optarg != NULL) {
parse_config_pidFile(NULL, optarg);
} else {
usage();
exit(1);
}
break;
#endif
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_UNISTD_H
case 'u':
if (optarg != NULL) {
char *ecp;
uid = strtoul(optarg, &ecp, 10);
if (*ecp) {
#if HAVE_GETPWNAM && HAVE_PWD_H
struct passwd *info;
info = getpwnam(optarg);
if (info) {
uid = info->pw_uid;
} else {
#endif
fprintf(stderr, "Bad user id: %s\n", optarg);
exit(1);
#if HAVE_GETPWNAM && HAVE_PWD_H
}
#endif
}
netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_USERID, uid);
} 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);
}
}
}
}
SOCK_STARTUP;
/*
* 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;
snmp_enable_syslog();
} 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(NETSNMP_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(NETSNMP_SNMPTRAPD_DISABLE_AGENTX)
/*
* initialize local modules
*/
if (agentx_subagent) {
#ifdef USING_SNMPV3_SNMPENGINE_MODULE
extern void register_snmpEngine_scalars_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
}
#endif /* USING_AGENTX_SUBAGENT_MODULE && !NETSNMP_SNMPTRAPD_DISABLE_AGENTX */
/* register our authorization handler */
init_netsnmp_trapd_auth();
#if defined(USING_AGENTX_SUBAGENT_MODULE) && !defined(NETSNMP_SNMPTRAPD_DISABLE_AGENTX)
if (agentx_subagent) {
#ifdef USING_AGENT_NSVACMACCESSTABLE_MODULE
extern void init_register_nsVacm_context(const char *);
#endif
#ifdef USING_SNMPV3_USMUSER_MODULE
extern void init_register_usmUser_context(const char *);
/* register ourselves as having a USM user database */
init_register_usmUser_context("snmptrapd");
#endif
#ifdef USING_AGENT_NSVACMACCESSTABLE_MODULE
/* register net-snmp vacm extensions */
init_register_nsVacm_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");
#ifdef SIGHUP
signal(SIGHUP, hup_handler);
#endif
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 <facility> instead\n");
}
if (listen_ports)
cp = listen_ports;
else
cp = default_port;
while (cp != NULL) {
char *sep = strchr(cp, ',');
if (sep != NULL) {
*sep = 0;
}
transport = netsnmp_transport_open_server("snmptrap", cp);
if (transport == NULL) {
snmp_log(LOG_ERR, "couldn't open %s -- errno %d (\"%s\")\n",
cp, 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 - %s", strerror(errno));
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;
#if HAVE_UNISTD_H
#ifdef HAVE_SETGID
if ((gid = netsnmp_ds_get_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_GROUPID)) != 0) {
DEBUGMSGTL(("snmptrapd/main", "Changing gid to %d.\n", gid));
if (setgid(gid) == -1
#ifdef HAVE_SETGROUPS
|| setgroups(1, (gid_t *)&gid) == -1
#endif
) {
snmp_log_perror("setgid failed");
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
exit(1);
}
}
}
#endif
#ifdef HAVE_SETUID
if ((uid = netsnmp_ds_get_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_USERID)) != 0) {
DEBUGMSGTL(("snmptrapd/main", "Changing uid to %d.\n", uid));
if (setuid(uid) == -1) {
snmp_log_perror("setuid failed");
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
exit(1);
}
}
}
#endif
#endif
#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();
free_trap2_fmt();
print_format1 = strdup(trap1_fmt_str_remember);
print_format2 = 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;
}
int
main(int argc, char *argv[])
{
int arg, i;
int ret;
u_short dest_port = SNMP_PORT;
int dont_fork = 0;
char logfile[SNMP_MAXBUF_SMALL];
char *cptr, **argvptr;
char *pid_file = NULL;
#if HAVE_GETPID
FILE *PID;
#endif
int dont_zero_log = 0;
int stderr_log=0, syslog_log=0;
int uid=0, gid=0;
logfile[0] = 0;
#ifdef LOGFILE
strcpy(logfile, LOGFILE);
#endif
/*
* usage: snmpd
*/
for (arg = 1; arg < argc; arg++)
{
if (argv[arg][0] == '-') {
switch (argv[arg][1]) {
case 'c':
if (++arg == argc)
usage(argv[0]);
ds_set_string(DS_LIBRARY_ID, DS_LIB_OPTIONALCONFIG,
argv[arg]);
break;
case 'C':
ds_set_boolean(DS_LIBRARY_ID, DS_LIB_DONT_READ_CONFIGS, 1);
break;
case 'd':
snmp_set_dump_packet(++snmp_dump_packet);
ds_set_boolean(DS_APPLICATION_ID, DS_AGENT_VERBOSE, 1);
break;
case 'q':
snmp_set_quick_print(1);
break;
case 'T':
if (argv[arg][2] != '\0')
cptr = &argv[arg][2];
else if (++arg>argc) {
fprintf(stderr,"Need UDP or TCP after -T flag.\n");
usage(argv[0]);
exit(1);
} else {
cptr = argv[arg];
}
if (strcasecmp(cptr,"TCP") == 0) {
ds_set_int(DS_APPLICATION_ID, DS_AGENT_FLAGS,
ds_get_int(DS_APPLICATION_ID, DS_AGENT_FLAGS)
| SNMP_FLAGS_STREAM_SOCKET);
} else if (strcasecmp(cptr,"UDP") == 0) {
/* default, do nothing */
} else {
fprintf(stderr,
"Unknown transport \"%s\" after -T flag.\n",
cptr);
usage(argv[0]);
exit(1);
}
break;
case 'D':
debug_register_tokens(&argv[arg][2]);
snmp_set_do_debugging(1);
break;
case 'p':
if (++arg == argc)
usage(argv[0]);
dest_port = atoi(argv[arg]);
if (dest_port <= 0)
usage(argv[0]);
break;
case 'x':
if (++arg == argc)
usage(argv[0]);
ds_set_string(DS_APPLICATION_ID, DS_AGENT_X_SOCKET, argv[arg]);
break;
case 'r':
ds_set_boolean(DS_APPLICATION_ID,
DS_AGENT_NO_ROOT_ACCESS, 1);
break;
case 'P':
if (++arg == argc)
usage(argv[0]);
pid_file = argv[arg];
case 'a':
log_addresses++;
break;
case 'V':
ds_set_boolean(DS_APPLICATION_ID, DS_AGENT_VERBOSE, 1);
break;
case 'f':
dont_fork = 1;
break;
case 'l':
if (++arg == argc)
usage(argv[0]);
strcpy(logfile, argv[arg]);
break;
case 'L':
stderr_log=1;
break;
case 's':
syslog_log=1;
break;
case 'A':
dont_zero_log = 1;
break;
#if HAVE_UNISTD_H
case 'u':
if (++arg == argc) usage(argv[0]);
uid = atoi(argv[arg]);
break;
case 'g':
if (++arg == argc) usage(argv[0]);
gid = atoi(argv[arg]);
break;
#endif
case 'h':
usage(argv[0]);
break;
case 'H':
init_agent("snmpd"); /* register our .conf handlers */
init_mib_modules();
init_snmp("snmpd");
fprintf(stderr, "Configuration directives understood:\n");
read_config_print_usage(" ");
exit(0);
case 'v':
printf("\nUCD-snmp version: %s\n",VersionInfo);
printf("Author: Wes Hardaker\n");
printf("Email: [email protected]\n\n");
exit (0);
case '-':
switch(argv[arg][2]) {
case 'v':
printf("\nUCD-snmp version: %s\n",VersionInfo);
printf("Author: Wes Hardaker\n");
printf("Email: [email protected]\n\n");
exit (0);
case 'h':
usage(argv[0]);
exit(0);
}
default:
printf("invalid option: %s\n", argv[arg]);
usage(argv[0]);
break;
}
continue;
}
} /* end-for */
/*
* Initialize a argv set to the current for restarting the agent.
*/
argvrestartp = (char **) malloc((argc + 2) * sizeof(char *));
argvptr = argvrestartp;
for (i = 0, ret = 1; i < argc; i++) {
ret += strlen(argv[i]) + 1;
}
argvrestart = (char *) malloc(ret);
argvrestartname = (char *) malloc(strlen(argv[0]) + 1);
strcpy(argvrestartname, argv[0]);
if ( strstr(argvrestartname, "agentxd") != NULL)
ds_set_boolean(DS_APPLICATION_ID, DS_AGENT_ROLE, SUB_AGENT);
else
ds_set_boolean(DS_APPLICATION_ID, DS_AGENT_ROLE, MASTER_AGENT);
for (cptr = argvrestart, i = 0; i < argc; i++) {
strcpy(cptr, argv[i]);
*(argvptr++) = cptr;
cptr += strlen(argv[i]) + 1;
}
*cptr = 0;
*argvptr = NULL;
/*
* Open the logfile if necessary.
*/
/* Should open logfile and/or syslog based on arguments */
if (logfile[0])
snmp_enable_filelog(logfile, dont_zero_log);
if (syslog_log)
snmp_enable_syslog();
#ifdef BUFSIZ
setvbuf(stdout, NULL, _IOLBF, BUFSIZ);
#endif
/*
* Initialize the world. Detach from the shell.
* Create initial user.
*/
#if HAVE_FORK
if (!dont_fork && fork() != 0) {
exit(0);
}
#endif
#if HAVE_GETPID
if (pid_file != NULL) {
if ((PID = fopen(pid_file, "w")) == NULL) {
snmp_log_perror("fopen");
if (!ds_get_boolean(DS_APPLICATION_ID, DS_AGENT_NO_ROOT_ACCESS))
exit(1);
}
else {
fprintf(PID, "%d\n", (int)getpid());
fclose(PID);
}
}
#endif
#else /* __ECOS environment: */
void snmpd( void *initfunc( void ) ) {
int ret;
u_short dest_port = SNMP_PORT;
#define stderr_log 1
#endif
// ---------
// En-bloc reinitialization of statics.
running = 1;
// ---------
SOCK_STARTUP;
init_agent("snmpd"); /* do what we need to do first. */
init_mib_modules();
/* start library */
init_snmp("snmpd");
ret = init_master_agent( dest_port,
snmp_check_packet,
snmp_check_parse );
if( ret != 0 )
Exit(1); /* Exit logs exit val for us */
#ifdef SIGTERM
signal(SIGTERM, SnmpdShutDown);
#endif
#ifdef SIGINT
signal(SIGINT, SnmpdShutDown);
#endif
#ifdef SIGHUP
signal(SIGHUP, SnmpdReconfig);
#endif
#ifdef SIGUSR1
signal(SIGUSR1, SnmpdDump);
#endif
/* send coldstart trap via snmptrap(1) if possible */
send_easy_trap (0, 0);
#if HAVE_UNISTD_H
if (gid) {
DEBUGMSGTL(("snmpd", "Changing gid to %d.\n", gid));
if (setgid(gid)==-1) {
snmp_log_perror("setgid failed");
if (!ds_get_boolean(DS_APPLICATION_ID, DS_AGENT_NO_ROOT_ACCESS))
exit(1);
}
}
if (uid) {
DEBUGMSGTL(("snmpd", "Changing uid to %d.\n", uid));
if(setuid(uid)==-1) {
snmp_log_perror("setuid failed");
if (!ds_get_boolean(DS_APPLICATION_ID, DS_AGENT_NO_ROOT_ACCESS))
exit(1);
}
}
#endif
/* honor selection of standard error output */
if (!stderr_log)
snmp_disable_stderrlog();
/* we're up, log our version number */
snmp_log(LOG_INFO, "UCD-SNMP version %s\n", VersionInfo);
memset(addrCache, 0, sizeof(addrCache));
/*
* Call initialization function if necessary
*/
DEBUGMSGTL(("snmpd", "Calling initfunc().\n"));
if ( initfunc )
(initfunc)();
/*
* Forever monitor the dest_port for incoming PDUs.
*/
DEBUGMSGTL(("snmpd", "We're up. Starting to process data.\n"));
receive();
#include "mib_module_shutdown.h"
DEBUGMSGTL(("snmpd", "sending shutdown trap\n"));
SnmpTrapNodeDown();
DEBUGMSGTL(("snmpd", "Bye...\n"));
snmp_shutdown("snmpd");
} /* End main() -- snmpd */
main(int argc, char *argv[])
#endif
{
char options[128] = "ac:CdD::efF:hHl:L:m:M:no:PqsS:tvO:-:";
netsnmp_session *sess_list = NULL, *ss = NULL;
netsnmp_transport *transport = NULL;
int arg, i = 0;
int count, numfds, block;
fd_set fdset;
struct timeval timeout, *tvp;
char *cp, *listen_ports = NULL;
int agentx_subagent = 1, depmsg = 0;
/*
* 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
snmp_log_syslogname(app_name);
/*
* 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 '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_notification_log();
init_snmp("snmptrapd");
fprintf(stderr, "Configuration directives understood:\n");
read_config_print_usage(" ");
exit(0);
case 'S':
fprintf(stderr,
"Warning: -S option is deprecated; use -Ls <facility> 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 <file> instead\n");
Print++;
if (optarg != NULL) {
logfile = optarg;
snmp_enable_filelog(optarg, 0);
} 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);
}
Log++;
break;
case 'P':
fprintf(stderr,
"Warning: -P option is deprecated; use -f -Le instead\n");
dofork = 0;
snmp_enable_stderrlog();
Print++;
break;
case 's':
fprintf(stderr,
"Warning: -s option is deprecated; use -Lsd instead\n");
depmsg = 1;
Syslog++;
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;
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 (!Log && !Print) {
Syslog = 1;
netsnmp_add_global_traphandler(NETSNMPTRAPD_PRE_HANDLER, syslog_handler);
} else {
netsnmp_add_global_traphandler(NETSNMPTRAPD_PRE_HANDLER, print_handler);
}
netsnmp_add_global_traphandler(NETSNMPTRAPD_POST_HANDLER, notification_handler);
if (Event) {
netsnmp_add_traphandler(event_handler, risingAlarm,
OID_LENGTH(risingAlarm));
netsnmp_add_traphandler(event_handler, fallingAlarm,
OID_LENGTH(fallingAlarm));
netsnmp_add_traphandler(event_handler, unavailableAlarm,
OID_LENGTH(unavailableAlarm));
/* XXX - might be worth setting some "magic data"
* in the traphandler structure that 'event_handler'
* can use to avoid checking the trap OID values.
*/
}
#ifdef USING_AGENTX_SUBAGENT_MODULE
/*
* 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");
/*
* initialize local modules
*/
if (agentx_subagent) {
extern void init_register_usmUser_context(const char *);
#ifdef USING_AGENTX_SUBAGENT_MODULE
void init_subagent(void);
init_subagent();
#endif
/* register the notification log table */
init_notification_log();
/* register ourselves as having a USM user database */
init_register_usmUser_context("snmptrapd");
}
#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.
*/
running = 0;
}
#ifndef WIN32
/*
* fork the process to the background if we are not printing to stderr
*/
if (dofork && 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
if (Syslog) {
snmp_enable_syslog_ident(app_name, Facility);
snmp_log(LOG_INFO, "Starting snmptrapd %s\n", netsnmp_get_version());
if (depmsg) {
snmp_log(LOG_WARNING, "-s and -S options are deprecated; use -Ls <facility> instead\n");
}
}
if (Print || Log) {
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 Started.\n",
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec,
netsnmp_get_version());
}
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);
if (Syslog) {
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;
}
}
signal(SIGTERM, term_handler);
#ifdef SIGHUP
signal(SIGHUP, hup_handler);
#endif
signal(SIGINT, term_handler);
#ifdef WIN32SERVICE
trapd_status = SNMPTRAPD_RUNNING;
#endif
while (running) {
if (reconfig) {
if (Print || Log) {
struct tm *tm;
time_t timer;
time(&timer);
tm = localtime(&timer);
/*
* 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.
*/
if (logfile)
snmp_enable_filelog(logfile, 1);
snmp_log(LOG_INFO,
"%.4d-%.2d-%.2d %.2d:%.2d:%.2d NET-SNMP version %s Reconfigured.\n",
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec,
netsnmp_get_version());
}
if (Syslog)
snmp_log(LOG_INFO, "Snmptrapd reconfiguring");
trapd_update_config();
if (trap1_fmt_str_remember) {
free_trap1_fmt();
print_format1 = strdup(trap1_fmt_str_remember);
}
reconfig = 0;
}
numfds = 0;
FD_ZERO(&fdset);
block = 0;
tvp = &timeout;
timerclear(tvp);
tvp->tv_sec = 5;
snmp_select_info(&numfds, &fdset, tvp, &block);
if (block == 1)
tvp = NULL; /* block without timeout */
count = select(numfds, &fdset, 0, 0, tvp);
gettimeofday(&Now, 0);
if (count > 0) {
snmp_read(&fdset);
} else
switch (count) {
case 0:
snmp_timeout();
break;
case -1:
if (errno == EINTR)
continue;
snmp_log_perror("select");
running = 0;
break;
default:
fprintf(stderr, "select returned %d\n", count);
running = 0;
}
run_alarms();
}
if (Print || Log) {
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());
}
if (Syslog) {
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;
}