void
simpleSNMPupdate()
{
int count;
int numfds, block;
fd_set fdset;
struct timeval timeout, *tvp;
numfds = 0;
FD_ZERO(&fdset);
block = 0;
tvp = &timeout;
timerclear(tvp);
tvp->tv_sec = 0;
snmp_select_info(&numfds, &fdset, tvp, &block);
/* if (block == 1)
tvp = NULL; */ /* block without timeout */
count = select(numfds, &fdset, 0, 0, tvp);
if (count > 0){
snmp_read(&fdset);
} else switch(count){
case 0:
snmp_timeout();
break;
case -1:
fprintf(stderr, "snmp error on select\n");
break;
default:
fprintf(stderr, "select returned %d\n", count);
}
}
void snmp_process(void) {
int nfds = 0;
int block = 1;
fd_set fdset;
struct timeval timeout;
if (snmp_repeaterinfo_received) {
snmp_repeaterinfo_received = 0;
if (snmp_session_repeaterinfo != NULL) {
snmp_close(snmp_session_repeaterinfo);
snmp_session_repeaterinfo = NULL;
}
}
if (snmp_rssi_received) {
snmp_rssi_received = 0;
if (snmp_session_rssi != NULL) {
snmp_close(snmp_session_rssi);
snmp_session_rssi = NULL;
}
}
FD_ZERO(&fdset);
if (snmp_select_info(&nfds, &fdset, &timeout, &block) <= 0)
return;
// Timeout is handled by daemon-poll.
daemon_poll_setmaxtimeout(timeout.tv_sec*1000+timeout.tv_usec/1000);
// As timeout is handled by daemon-poll, we want select() to return immediately here.
timeout.tv_sec = timeout.tv_usec = 0;
nfds = select(nfds, &fdset, NULL, NULL, &timeout);
if (nfds > 0)
snmp_read(&fdset);
else
snmp_timeout();
}
void asynchronous(void)
{
struct session *hs;
struct host *hp;
/* startup all hosts */
for (hs = sessions, hp = hosts; hp->name; hs++, hp++) {
struct snmp_pdu *req;
struct snmp_session sess;
snmp_sess_init(&sess); /* initialize session */
sess.version = SNMP_VERSION_2c;
sess.peername = strdup(hp->name);
sess.community = strdup(hp->community);
sess.community_len = strlen(sess.community);
sess.callback = asynch_response; /* default callback */
sess.callback_magic = hs;
if (!(hs->sess = snmp_open(&sess))) {
snmp_perror("snmp_open");
continue;
}
hs->current_oid = oids;
req = snmp_pdu_create(SNMP_MSG_GET); /* send the first GET */
snmp_add_null_var(req, hs->current_oid->Oid, hs->current_oid->OidLen);
if (snmp_send(hs->sess, req))
active_hosts++;
else {
snmp_perror("snmp_send");
snmp_free_pdu(req);
}
}
/* loop while any active hosts */
while (active_hosts) {
int fds = 0, block = 1;
fd_set fdset;
struct timeval timeout;
FD_ZERO(&fdset);
snmp_select_info(&fds, &fdset, &timeout, &block);
fds = select(fds, &fdset, NULL, NULL, block ? NULL : &timeout);
if (fds < 0) {
perror("select failed");
exit(1);
}
if (fds)
snmp_read(&fdset);
else
snmp_timeout();
}
/* cleanup */
for (hp = hosts, hs = sessions; hp->name; hs++, hp++) {
if (hs->sess) snmp_close(hs->sess);
}
}
/*
* Callback function for a SNMP timeout.
*
* A SNMP timeout has occurred. Call `snmp_timeout()` to handle it.
*/
static void
levent_snmp_timeout(evutil_socket_t fd, short what, void *arg)
{
struct lldpd *cfg = arg;
(void)what; (void)fd;
snmp_timeout();
run_alarms();
levent_snmp_update(cfg);
}
static PyObject*
SnmpModule_timeout(PyObject *self)
{
Py_CLEAR(timeoutId);
snmp_timeout();
if (Snmp_updatereactor() == -1)
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
int
agent_check_and_process(int block) {
int numfds;
fd_set fdset;
struct timeval timeout, *tvp = &timeout;
int count;
int fakeblock=0;
tvp = &timeout;
tvp->tv_sec = 0;
tvp->tv_usec = 0;
numfds = 0;
FD_ZERO(&fdset);
snmp_select_info(&numfds, &fdset, tvp, &fakeblock);
if (block == 1 && fakeblock == 1)
tvp = NULL; /* block without timeout */
else if (block == 0) {
tvp->tv_sec = 0;
tvp->tv_usec = 0;
}
count = select(numfds, &fdset, 0, 0, tvp);
if (count > 0){
/* packets found, process them */
snmp_read(&fdset);
} else switch(count){
case 0:
snmp_timeout();
break;
case -1:
if (errno == EINTR){
return -1;
} else {
snmp_log_perror("select");
}
return -1;
default:
snmp_log(LOG_ERR, "select returned %d\n", count);
return -1;
} /* endif -- count>0 */
return count;
}
/**
* This is the easiest way to integrate SNMP without
* introducing threads. It would be nicer if it could
* register a timeout and the fd it wants to have selected
* for reading. We could try to find the fd's it is using
* for the session but there is no difference in performance
*/
void snmp_mtp_poll()
{
int num_fds = 0, block = 0;
fd_set fds;
FD_ZERO(&fds);
struct timeval tv;
int rc;
snmp_select_info(&num_fds, &fds, &tv, &block);
memset(&tv, 0, sizeof(tv));
rc = select(num_fds, &fds, NULL, NULL, &tv);
if (rc == 0)
snmp_timeout();
else
snmp_read(&fds);
}
void communicate(void)
{
/* loop while any active requests */
while (active_requests) {
int fds = 0, block = 1;
fd_set fdset;
struct timeval timeout;
FD_ZERO(&fdset);
snmp_select_info(&fds, &fdset, &timeout, &block);
fds = select(fds, &fdset, NULL, NULL, block ? NULL : &timeout);
if (fds < 0) {
perror("select failed");
exit(1);
}
if (fds)
snmp_read(&fdset);
else
snmp_timeout();
}
}
static lagopus_result_t
internal_snmpmgr_poll(lagopus_chrono_t nsec) {
int numfds = 0;
fd_set fdset;
struct timespec timeout = { 0, 0 };
struct timeval timeout_dummy;
int count = 0;
int block = true;
lagopus_result_t ret = LAGOPUS_RESULT_ANY_FAILURES;
NSEC_TO_TS(nsec, timeout);
FD_ZERO(&fdset);
if (snmp_select_info(&numfds, &fdset, &timeout_dummy, &block) > 0) {
if ((count = pselect(numfds, &fdset, NULL, NULL, &timeout, NULL)) > 0) {
snmp_read(&fdset);
} else {
if (count == 0) {
snmp_timeout();
} else {
perror("pselect");
return LAGOPUS_RESULT_POSIX_API_ERROR;
}
}
/* run callbacks includes that checking connetion to AgetnX master agent */
run_alarms();
netsnmp_check_outstanding_agent_requests();
if (count == 0) {
ret = LAGOPUS_RESULT_TIMEDOUT;
} else {
ret = LAGOPUS_RESULT_OK;
}
} else { /* snmp_select_info */
ret = LAGOPUS_RESULT_SNMP_API_ERROR;
}
return ret;
}
void active_hosts()
{
/* loop while any active hosts */
while (hosts) {
/* printf("Active Host: %d\n", hosts); */
int fds = 0, block = 1;
fd_set fdset;
struct timeval timeout;
FD_ZERO(&fdset);
snmp_select_info(&fds, &fdset, &timeout, &block);
fds = select(fds, &fdset, NULL, NULL, block ? NULL : &timeout);
if (fds < 0) {
perror("select failed");
exit(1);
}
if (fds)
snmp_read(&fdset);
else
snmp_timeout();
}
}
/*
* Funcion: void * hilo_lectura (void * thread_args)
*
* Funcion ejecutada en un hilo. Se encargará de recibir las
* respuestas a las pdu enviadas por los poller a traves de la
* funcion send
*/
void * hilo_lectura (void * thread_args) {
//Variables auxiliares
int fds = 0;
int block = 1;
int aux_fin = 1;
struct timeval timeout;
//Leo mientras no reciba Ctrl_C
while(fin) {
//Solo entro si hay sesiones activas
if (sesiones_activas != 0)
{
snmp_select_info(&fds, &fdset, &timeout, &block);
fds = select(fds, &fdset, NULL, NULL, block ? NULL : &timeout);
if (fds){
snmp_read(&fdset);
}
else {
/*
* Si se produce un timeout es que no hay nada que leer de
* un determinado descriptor de fichero
*/
snmp_timeout();
}
}
}
/*
* Activo variable global, para saber que se ha terminado leer
* y poder cerrar las sesiones
*/
fin_lectura = 0;
return 0;
}
static void select_loop() {
int count, numfds, block;
fd_set readfds, writefds, exceptfds;
struct timeval timeout, *tvp;
while (1) {
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;
}
count = select(numfds, &readfds, &writefds, &exceptfds, tvp);
printf("%s: select returned %d\n", program_name, count);
if (count > 0) {
snmp_read(&readfds);
} else {
switch (count) {
case 0:
snmp_timeout();
break;
case -1:
if (errno == EINTR) {
continue;
}
snmp_log_perror("select");
break;
}
}
}
}
/*Check if data has been received*/
int
netSelect(TimeInternal * timeout, NetPath * netPath, fd_set *readfds)
{
int ret, nfds;
struct timeval tv, *tv_ptr;
#if defined PTPD_SNMP
extern RunTimeOpts rtOpts;
struct timeval snmp_timer_wait = { 0, 0}; // initialise to avoid unused warnings when SNMP disabled
int snmpblock = 0;
#endif
if (timeout) {
if(isTimeInternalNegative(timeout)) {
ERROR("Negative timeout attempted for select()\n");
return -1;
}
tv.tv_sec = timeout->seconds;
tv.tv_usec = timeout->nanoseconds / 1000;
tv_ptr = &tv;
} else {
tv_ptr = NULL;
}
FD_ZERO(readfds);
nfds = 0;
#ifdef PTPD_PCAP
if (netPath->pcapEventSock >= 0) {
FD_SET(netPath->pcapEventSock, readfds);
if (netPath->pcapGeneralSock >= 0)
FD_SET(netPath->pcapGeneralSock, readfds);
nfds = netPath->pcapEventSock;
if (netPath->pcapEventSock < netPath->pcapGeneralSock)
nfds = netPath->pcapGeneralSock;
} else if (netPath->eventSock >= 0) {
#endif
FD_SET(netPath->eventSock, readfds);
if (netPath->generalSock >= 0)
FD_SET(netPath->generalSock, readfds);
nfds = netPath->eventSock;
if (netPath->eventSock < netPath->generalSock)
nfds = netPath->generalSock;
#ifdef PTPD_PCAP
}
#endif
nfds++;
#if defined PTPD_SNMP
if (rtOpts.snmp_enabled) {
snmpblock = 1;
if (tv_ptr) {
snmpblock = 0;
memcpy(&snmp_timer_wait, tv_ptr, sizeof(struct timeval));
}
snmp_select_info(&nfds, readfds, &snmp_timer_wait, &snmpblock);
if (snmpblock == 0)
tv_ptr = &snmp_timer_wait;
}
#endif
ret = select(nfds, readfds, 0, 0, tv_ptr);
if (ret < 0) {
if (errno == EAGAIN || errno == EINTR)
return 0;
}
#if defined PTPD_SNMP
if (rtOpts.snmp_enabled) {
/* Maybe we have received SNMP related data */
if (ret > 0) {
snmp_read(readfds);
} else if (ret == 0) {
snmp_timeout();
run_alarms();
}
netsnmp_check_outstanding_agent_requests();
}
#endif
return ret;
}
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;
}
static void
snmptrapd_main_loop(void)
{
int count, numfds, block;
fd_set readfds,writefds,exceptfds;
struct timeval timeout, *tvp;
while (netsnmp_running) {
if (reconfig) {
/*
* If we are logging to a file, receipt of SIGHUP also
* indicates that 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) {
parse_format( NULL, 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 */
#ifndef NETSNMP_FEATURE_REMOVE_FD_EVENT_MANAGER
netsnmp_external_event_info(&numfds, &readfds, &writefds, &exceptfds);
#endif /* NETSNMP_FEATURE_REMOVE_FD_EVENT_MANAGER */
count = select(numfds, &readfds, &writefds, &exceptfds, tvp);
if (count > 0) {
#ifndef NETSNMP_FEATURE_REMOVE_FD_EVENT_MANAGER
netsnmp_dispatch_external_events(&count, &readfds, &writefds,
&exceptfds);
#endif /* NETSNMP_FEATURE_REMOVE_FD_EVENT_MANAGER */
/* 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();
}
}
void snmp_check_timeout(selector_t *sel,
void *cb_data)
{
snmp_timeout();
}
void snmpAsynchronous(tInterfaceList *interfaceList)
{
tSession *hs;
tInterface *interface;
/* startup all hosts */
unsigned int i = 0;
while (i < interfaceList->count) {
interface = &interfaceList->interface[i];
hs = &sessions[i];
//printf("snmpAsynchronous: %s\n", interfaceList->interface[i].ip);
struct snmp_pdu *req;
struct snmp_session sess;
snmp_sess_init(&sess); /* initialize session */
sess.version = SNMP_VERSION_1;
sess.peername = strdup(interface->ip);
sess.community = (u_char*)strdup(interface->community);
sess.community_len = strlen((char*)sess.community);
sess.callback = snmpAsyncResponse; /* default callback */
sess.callback_magic = hs;
if (!(hs->sess = snmp_open(&sess))) {
syslog(LOG_ERR, "snmpAsynchronous: snmp_open failed for: %d %s", interfaceList->interface[i].id_interface, interfaceList->interface[i].ip);
i++;
continue;
}
hs->oidList = interface->oidList;
hs->current_oid = 0;
req = snmp_pdu_create(hs->oidList.oid[hs->current_oid].doWalk ? SNMP_MSG_GETNEXT : SNMP_MSG_GET); /* send the first GET */
snmp_add_null_var(req, hs->oidList.oid[hs->current_oid].Oid, hs->oidList.oid[hs->current_oid].OidLen);
if (snmp_send(hs->sess, req))
snmpActiveHosts++;
else {
syslog(LOG_ERR, "snmpAsynchronous: snmp_send failed for: %d %s", interfaceList->interface[i].id_interface, interfaceList->interface[i].ip);
snmp_free_pdu(req);
}
i++;
}
/* loop while any active hosts */
while (snmpActiveHosts) {
int fds = 0, block = 1;
fd_set fdset;
struct timeval timeout;
FD_ZERO(&fdset);
snmp_select_info(&fds, &fdset, &timeout, &block);
fds = select(fds, &fdset, NULL, NULL, block ? NULL : &timeout);
if (fds < 0) {
perror("select failed");
exit(1);
}
if (fds)
snmp_read(&fdset);
else
snmp_timeout();
}
/* cleanup */
i = 0;
while (i < interfaceList->count) {
interface = &interfaceList->interface[i];
hs = &sessions[i];
if (hs->sess) snmp_close(hs->sess);
i++;
}
}
/*******************************************************************-o-******
* receive
*
* Parameters:
*
* Returns:
* 0 On success.
* -1 System error.
*
* Infinite while-loop which monitors incoming messges for the agent.
* Invoke the established message handlers for incoming messages on a per
* port basis. Handle timeouts.
*/
static int
receive(void)
{
int numfds;
fd_set readfds, writefds, exceptfds;
struct timeval timeout, *tvp = &timeout;
struct timeval sched, *svp = &sched, now, *nvp = &now;
int count, block, i;
#ifdef USING_SMUX_MODULE
int sd;
#endif /* USING_SMUX_MODULE */
/*
* Set the 'sched'uled timeout to the current time + one TIMETICK.
*/
gettimeofday(nvp, (struct timezone *) NULL);
svp->tv_usec = nvp->tv_usec + TIMETICK;
svp->tv_sec = nvp->tv_sec;
while (svp->tv_usec >= ONE_SEC) {
svp->tv_usec -= ONE_SEC;
svp->tv_sec++;
}
/*
* ignore early sighup during startup
*/
reconfig = 0;
/*
* Loop-forever: execute message handlers for sockets with data,
* reset the 'sched'uler.
*/
while (netsnmp_running) {
if (reconfig) {
reconfig = 0;
snmp_log(LOG_INFO, "Reconfiguring daemon\n");
/* Stop and restart logging. This allows logfiles to be
rotated etc. */
snmp_disable_log();
setup_log(1, 0, 0, 0, NULL);
snmp_log(LOG_INFO, "NET-SNMP version %s restarted\n",
netsnmp_get_version());
update_config();
send_easy_trap(SNMP_TRAP_ENTERPRISESPECIFIC, 3);
}
for (i = 0; i < NUM_EXTERNAL_SIGS; i++) {
if (external_signal_scheduled[i]) {
external_signal_scheduled[i]--;
external_signal_handler[i](i);
}
}
tvp = &timeout;
tvp->tv_sec = 0;
tvp->tv_usec = TIMETICK;
numfds = 0;
FD_ZERO(&readfds);
FD_ZERO(&writefds);
FD_ZERO(&exceptfds);
block = 0;
snmp_select_info(&numfds, &readfds, tvp, &block);
if (block == 1) {
tvp = NULL; /* block without timeout */
}
#ifdef USING_SMUX_MODULE
if (smux_listen_sd >= 0) {
FD_SET(smux_listen_sd, &readfds);
numfds =
smux_listen_sd >= numfds ? smux_listen_sd + 1 : numfds;
for (i = 0; i < sdlen; i++) {
FD_SET(sdlist[i], &readfds);
numfds = sdlist[i] >= numfds ? sdlist[i] + 1 : numfds;
}
}
#endif /* USING_SMUX_MODULE */
for (i = 0; i < external_readfdlen; i++) {
FD_SET(external_readfd[i], &readfds);
if (external_readfd[i] >= numfds)
numfds = external_readfd[i] + 1;
}
for (i = 0; i < external_writefdlen; i++) {
FD_SET(external_writefd[i], &writefds);
if (external_writefd[i] >= numfds)
numfds = external_writefd[i] + 1;
}
for (i = 0; i < external_exceptfdlen; i++) {
FD_SET(external_exceptfd[i], &exceptfds);
if (external_exceptfd[i] >= numfds)
numfds = external_exceptfd[i] + 1;
}
reselect:
DEBUGMSGTL(("snmpd/select", "select( numfds=%d, ..., tvp=%p)\n",
numfds, tvp));
count = select(numfds, &readfds, &writefds, &exceptfds, tvp);
DEBUGMSGTL(("snmpd/select", "returned, count = %d\n", count));
if (count > 0) {
#ifdef USING_SMUX_MODULE
/*
* handle the SMUX sd's
*/
if (smux_listen_sd >= 0) {
for (i = 0; i < sdlen; i++) {
if (FD_ISSET(sdlist[i], &readfds)) {
if (smux_process(sdlist[i]) < 0) {
for (; i < (sdlen - 1); i++) {
sdlist[i] = sdlist[i + 1];
}
sdlen--;
}
}
}
/*
* new connection
*/
if (FD_ISSET(smux_listen_sd, &readfds)) {
if ((sd = smux_accept(smux_listen_sd)) >= 0) {
sdlist[sdlen++] = sd;
}
}
}
#endif /* USING_SMUX_MODULE */
snmp_read(&readfds);
for (i = 0; count && (i < external_readfdlen); i++) {
if (FD_ISSET(external_readfd[i], &readfds)) {
DEBUGMSGTL(("snmpd/select", "readfd[%d] = %d\n",
i, external_readfd[i]));
external_readfdfunc[i] (external_readfd[i],
external_readfd_data[i]);
FD_CLR(external_readfd[i], &readfds);
count--;
}
}
for (i = 0; count && (i < external_writefdlen); i++) {
if (FD_ISSET(external_writefd[i], &writefds)) {
DEBUGMSGTL(("snmpd/select", "writefd[%d] = %d\n",
i, external_writefd[i]));
external_writefdfunc[i] (external_writefd[i],
external_writefd_data[i]);
FD_CLR(external_writefd[i], &writefds);
count--;
}
}
for (i = 0; count && (i < external_exceptfdlen); i++) {
if (FD_ISSET(external_exceptfd[i], &exceptfds)) {
DEBUGMSGTL(("snmpd/select", "exceptfd[%d] = %d\n",
i, external_exceptfd[i]));
external_exceptfdfunc[i] (external_exceptfd[i],
external_exceptfd_data[i]);
FD_CLR(external_exceptfd[i], &exceptfds);
count--;
}
}
} else
switch (count) {
case 0:
snmp_timeout();
break;
case -1:
if (errno == EINTR) {
/*
* likely that we got a signal. Check our special signal
* flags before retrying select.
*/
if (netsnmp_running && !reconfig) {
goto reselect;
}
continue;
} else {
snmp_log_perror("select");
}
return -1;
default:
snmp_log(LOG_ERR, "select returned %d\n", count);
return -1;
} /* endif -- count>0 */
/*
* If the time 'now' is greater than the 'sched'uled time, then:
*
* Check alarm and event timers.
* Reset the 'sched'uled time to current time + one TIMETICK.
* Age the cache network addresses (from whom messges have
* been received).
*/
gettimeofday(nvp, (struct timezone *)NULL);
if (nvp->tv_sec > svp->tv_sec || (nvp->tv_sec == svp->tv_sec &&
nvp->tv_usec > svp->tv_usec)) {
svp->tv_usec = nvp->tv_usec + TIMETICK;
svp->tv_sec = nvp->tv_sec;
while (svp->tv_usec >= ONE_SEC) {
svp->tv_usec -= ONE_SEC;
svp->tv_sec++;
}
}
/*
* endif -- now>sched
*/
/*
* run requested alarms
*/
run_alarms();
netsnmp_check_outstanding_agent_requests();
} /* endwhile */
snmp_log(LOG_INFO, "Received TERM or STOP signal... shutting down...\n");
return 0;
} /* end receive() */
int
snmp_synch_response_cb(netsnmp_session * ss,
netsnmp_pdu *pdu,
netsnmp_pdu **response, snmp_callback pcb)
{
struct synch_state lstate, *state;
snmp_callback cbsav;
void *cbmagsav;
int numfds, count;
fd_set fdset;
struct timeval timeout, *tvp;
int block;
memset((void *) &lstate, 0, sizeof(lstate));
state = &lstate;
cbsav = ss->callback;
cbmagsav = ss->callback_magic;
ss->callback = pcb;
ss->callback_magic = (void *) state;
if ((state->reqid = snmp_send(ss, pdu)) == 0) {
snmp_free_pdu(pdu);
state->status = STAT_ERROR;
} else
state->waiting = 1;
while (state->waiting) {
numfds = 0;
FD_ZERO(&fdset);
block = SNMPBLOCK;
tvp = &timeout;
timerclear(tvp);
snmp_select_info(&numfds, &fdset, tvp, &block);
if (block == 1)
tvp = NULL; /* block without timeout */
count = select(numfds, &fdset, 0, 0, tvp);
if (count > 0) {
snmp_read(&fdset);
} else
switch (count) {
case 0:
snmp_timeout();
break;
case -1:
if (errno == EINTR) {
continue;
} else {
snmp_errno = SNMPERR_GENERR;
/*
* CAUTION! if another thread closed the socket(s)
* waited on here, the session structure was freed.
* It would be nice, but we can't rely on the pointer.
* ss->s_snmp_errno = SNMPERR_GENERR;
* ss->s_errno = errno;
*/
snmp_set_detail(strerror(errno));
}
/*
* FALLTHRU
*/
default:
state->status = STAT_ERROR;
state->waiting = 0;
}
}
*response = state->pdu;
ss->callback = cbsav;
ss->callback_magic = cbmagsav;
return state->status;
}
int powernet_snmp_ups_check_state(UPSINFO *ups)
{
struct snmp_ups_internal_data *Sid =
(struct snmp_ups_internal_data *)ups->driver_internal_data;
fd_set fds;
int numfds, rc, block;
struct timeval tmo, exit, now;
int sleep_time;
/* Check for commlost under lock since UPS status might be changed */
write_lock(ups);
rc = powernet_check_comm_lost(ups);
write_unlock(ups);
if (rc == 0)
return 0;
sleep_time = ups->wait_time;
/* If we're not doing SNMP traps, just sleep and exit */
if (!Sid->trap_session) {
sleep(sleep_time);
return 1;
}
/* Figure out when we need to exit by */
gettimeofday(&exit, NULL);
exit.tv_sec += sleep_time;
while(1)
{
/* Figure out how long until we have to exit */
gettimeofday(&now, NULL);
if (now.tv_sec > exit.tv_sec ||
(now.tv_sec == exit.tv_sec &&
now.tv_usec >= exit.tv_usec)) {
/* Done already? How time flies... */
return 0;
}
tmo.tv_sec = exit.tv_sec - now.tv_sec;
tmo.tv_usec = exit.tv_usec - now.tv_usec;
if (tmo.tv_usec < 0) {
tmo.tv_sec--; /* Normalize */
tmo.tv_usec += 1000000;
}
/* Get select parameters from SNMP library */
FD_ZERO(&fds);
block = 0;
numfds = 0;
snmp_select_info(&numfds, &fds, &tmo, &block);
/* Wait for something to happen */
rc = select(numfds, &fds, NULL, NULL, &tmo);
switch (rc) {
case 0: /* Timeout */
/* Tell SNMP library about the timeout */
snmp_timeout();
break;
case -1: /* Error */
if (errno == EINTR || errno == EAGAIN)
continue; /* assume SIGCHLD */
Dmsg1(200, "select error: ERR=%s\n", strerror(errno));
return 0;
default: /* Data available */
/* Reset trap flag and run callback processing */
Sid->trap_received = false;
snmp_read(&fds);
/* If callback processing set the flag, we got a trap */
if (Sid->trap_received)
return 1;
break;
}
}
}
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;
}
/*******************************************************************-o-******
* receive
*
* Parameters:
*
* Returns:
* 0 On success.
* -1 System error.
*
* Infinite while-loop which monitors incoming messages for the agent.
* Invoke the established message handlers for incoming messages on a per
* port basis. Handle timeouts.
*/
static int
receive(void)
{
int numfds;
netsnmp_large_fd_set readfds, writefds, exceptfds;
struct timeval timeout, *tvp = &timeout;
int count, block, i;
#ifdef USING_SMUX_MODULE
int sd;
#endif /* USING_SMUX_MODULE */
netsnmp_large_fd_set_init(&readfds, FD_SETSIZE);
netsnmp_large_fd_set_init(&writefds, FD_SETSIZE);
netsnmp_large_fd_set_init(&exceptfds, FD_SETSIZE);
/*
* ignore early sighup during startup
*/
reconfig = 0;
#if defined(WIN32)
create_stdin_waiter_thread();
#endif
/*
* Loop-forever: execute message handlers for sockets with data
*/
while (netsnmp_running) {
if (reconfig) {
#if HAVE_SIGHOLD
sighold(SIGHUP);
#endif
reconfig = 0;
snmp_log(LOG_INFO, "Reconfiguring daemon\n");
/* Stop and restart logging. This allows logfiles to be
rotated etc. */
netsnmp_logging_restart();
snmp_log(LOG_INFO, "NET-SNMP version %s restarted\n",
netsnmp_get_version());
update_config();
send_easy_trap(SNMP_TRAP_ENTERPRISESPECIFIC, 3);
#if HAVE_SIGHOLD
sigrelse(SIGHUP);
#endif
}
/*
* default to sleeping for a really long time. INT_MAX
* should be sufficient (eg we don't care if time_t is
* a long that's bigger than an int).
*/
tvp = &timeout;
tvp->tv_sec = INT_MAX;
tvp->tv_usec = 0;
numfds = 0;
NETSNMP_LARGE_FD_ZERO(&readfds);
NETSNMP_LARGE_FD_ZERO(&writefds);
NETSNMP_LARGE_FD_ZERO(&exceptfds);
block = 0;
snmp_select_info2(&numfds, &readfds, tvp, &block);
if (block == 1) {
tvp = NULL; /* block without timeout */
}
#ifdef USING_SMUX_MODULE
if (smux_listen_sd >= 0) {
NETSNMP_LARGE_FD_SET(smux_listen_sd, &readfds);
numfds =
smux_listen_sd >= numfds ? smux_listen_sd + 1 : numfds;
for (i = 0; i < smux_snmp_select_list_get_length(); i++) {
sd = smux_snmp_select_list_get_SD_from_List(i);
if (sd != 0)
{
NETSNMP_LARGE_FD_SET(sd, &readfds);
numfds = sd >= numfds ? sd + 1 : numfds;
}
}
}
#endif /* USING_SMUX_MODULE */
#ifndef NETSNMP_FEATURE_REMOVE_FD_EVENT_MANAGER
netsnmp_external_event_info2(&numfds, &readfds, &writefds, &exceptfds);
#endif /* NETSNMP_FEATURE_REMOVE_FD_EVENT_MANAGER */
reselect:
for (i = 0; i < NUM_EXTERNAL_SIGS; i++) {
if (external_signal_scheduled[i]) {
external_signal_scheduled[i]--;
external_signal_handler[i](i);
}
}
DEBUGMSGTL(("snmpd/select", "select( numfds=%d, ..., tvp=%p)\n",
numfds, tvp));
if (tvp)
DEBUGMSGTL(("timer", "tvp %ld.%ld\n", (long) tvp->tv_sec,
(long) tvp->tv_usec));
count = netsnmp_large_fd_set_select(numfds, &readfds, &writefds, &exceptfds,
tvp);
DEBUGMSGTL(("snmpd/select", "returned, count = %d\n", count));
if (count > 0) {
#ifdef USING_SMUX_MODULE
/*
* handle the SMUX sd's
*/
if (smux_listen_sd >= 0) {
for (i = 0; i < smux_snmp_select_list_get_length(); i++) {
sd = smux_snmp_select_list_get_SD_from_List(i);
if (NETSNMP_LARGE_FD_ISSET(sd, &readfds)) {
if (smux_process(sd) < 0) {
smux_snmp_select_list_del(sd);
}
}
}
/*
* new connection
*/
if (NETSNMP_LARGE_FD_ISSET(smux_listen_sd, &readfds)) {
if ((sd = smux_accept(smux_listen_sd)) >= 0) {
smux_snmp_select_list_add(sd);
}
}
}
#endif /* USING_SMUX_MODULE */
#ifndef NETSNMP_FEATURE_REMOVE_FD_EVENT_MANAGER
netsnmp_dispatch_external_events2(&count, &readfds,
&writefds, &exceptfds);
#endif /* NETSNMP_FEATURE_REMOVE_FD_EVENT_MANAGER */
/* If there are still events leftover, process them */
if (count > 0) {
snmp_read2(&readfds);
}
} else
switch (count) {
case 0:
snmp_timeout();
break;
case -1:
DEBUGMSGTL(("snmpd/select", " errno = %d\n", errno));
if (errno == EINTR) {
/*
* likely that we got a signal. Check our special signal
* flags before retrying select.
*/
if (netsnmp_running && !reconfig) {
goto reselect;
}
continue;
} else {
snmp_log_perror("select");
}
return -1;
default:
snmp_log(LOG_ERR, "select returned %d\n", count);
return -1;
} /* endif -- count>0 */
/*
* see if persistent store needs to be saved
*/
snmp_store_if_needed();
/*
* run requested alarms
*/
run_alarms();
netsnmp_check_outstanding_agent_requests();
} /* endwhile */
netsnmp_large_fd_set_cleanup(&readfds);
netsnmp_large_fd_set_cleanup(&writefds);
netsnmp_large_fd_set_cleanup(&exceptfds);
#if defined(WIN32)
join_stdin_waiter_thread();
#endif
snmp_log(LOG_INFO, "Received TERM or STOP signal... shutting down...\n");
return 0;
} /* end receive() */
static int
receive(int sdv[])
{
int numfds, ii;
fd_set fdset;
struct timeval timeout, *tvp = &timeout;
struct timeval sched, *svp = &sched, now, *nvp = &now;
int count, block;
gettimeofday(nvp, (struct timezone *) NULL);
svp->tv_usec = nvp->tv_usec + TIMETICK;
svp->tv_sec = nvp->tv_sec;
while (svp->tv_usec >= ONE_SEC){
svp->tv_usec -= ONE_SEC;
svp->tv_sec++;
}
while (running) {
tvp = &timeout;
tvp->tv_sec = 0;
tvp->tv_usec = TIMETICK;
numfds = 0;
FD_ZERO(&fdset);
for(ii = 0; ii < sdlen; ii++){
if (sdv[ii] + 1 > numfds)
numfds = sdv[ii] + 1;
FD_SET(sdv[ii], &fdset);
}
block = 0;
snmp_select_info(&numfds, &fdset, tvp, &block);
if (block == 1)
tvp = NULL; /* block without timeout */
count = select(numfds, &fdset, 0, 0, tvp);
if (count > 0){
for(ii = 0; ii < sdlen; ii++){
if(FD_ISSET(sdv[ii], &fdset)){
sd_handlers[ii](sdv[ii]);
FD_CLR(sdv[ii], &fdset);
}
}
snmp_read(&fdset);
} else switch(count){
case 0:
snmp_timeout();
break;
case -1:
if (errno == EINTR){
continue;
} else {
perror("select");
}
return -1;
default:
printf("select returned %d\n", count);
return -1;
}
gettimeofday(nvp, (struct timezone *) NULL);
if (nvp->tv_sec > svp->tv_sec
|| (nvp->tv_sec == svp->tv_sec && nvp->tv_usec > svp->tv_usec)){
#ifdef USING_V2PARTY_ALARM_MODULE
alarmTimer(nvp);
#endif
#ifdef USING_V2PARTY_EVENT_MODULE
eventTimer(nvp);
#endif
svp->tv_usec = nvp->tv_usec + TIMETICK;
svp->tv_sec = nvp->tv_sec;
while (svp->tv_usec >= ONE_SEC){
svp->tv_usec -= ONE_SEC;
svp->tv_sec++;
}
if (log_addresses && lastAddrAge++ > 600){
lastAddrAge = 0;
for(count = 0; count < ADDRCACHE; count++){
if (addrCache[count].status == OLD)
addrCache[count].status = UNUSED;
if (addrCache[count].status == USED)
addrCache[count].status = OLD;
}
}
}
}
return 0;
}
/*******************************************************************-o-******
* receive
*
* Parameters:
*
* Returns:
* 0 On success.
* -1 System error.
*
* Infinite while-loop which monitors incoming messages for the agent.
* Invoke the established message handlers for incoming messages on a per
* port basis. Handle timeouts.
*/
static int
receive(void)
{
int numfds;
netsnmp_large_fd_set readfds, writefds, exceptfds;
struct timeval timeout, *tvp = &timeout;
int count, block, i;
netsnmp_large_fd_set_init(&readfds, FD_SETSIZE);
netsnmp_large_fd_set_init(&writefds, FD_SETSIZE);
netsnmp_large_fd_set_init(&exceptfds, FD_SETSIZE);
/*
* you're main loop here...
*/
while (ams_running) {
/* following code from snmpd */
/*
* if you use select(), see snmp_select_info() in snmp_api(3)
*/
/*
* default to sleeping for a really long time. INT_MAX
* should be sufficient (eg we don't care if time_t is
* a long that's bigger than an int).
*/
tvp = &timeout;
tvp->tv_sec = INT_MAX;
tvp->tv_usec = 0;
numfds = 0;
NETSNMP_LARGE_FD_ZERO(&readfds);
NETSNMP_LARGE_FD_ZERO(&writefds);
NETSNMP_LARGE_FD_ZERO(&exceptfds);
block = 0;
snmp_sess_select_info2_flags(0, &numfds, &readfds, tvp, &block,
NETSNMP_SELECT_NOFLAGS);
if (block == 1) {
tvp = NULL; /* block without timeout */
}
netsnmp_external_event_info2(&numfds, &readfds, &writefds, &exceptfds);
reselect:
for (i = 0; i < NUM_EXTERNAL_SIGS; i++) {
if (external_signal_scheduled[i]) {
external_signal_scheduled[i]--;
external_signal_handler[i](i);
}
}
DEBUGMSGTL(("snmpd/select", "select( numfds=%d, ..., tvp=%p)\n",
numfds, tvp));
if (tvp)
DEBUGMSGTL(("timer", "tvp %ld.%ld\n", (long) tvp->tv_sec,
(long) tvp->tv_usec));
count = netsnmp_large_fd_set_select(numfds, &readfds, &writefds, &exceptfds,
tvp);
DEBUGMSGTL(("snmpd/select", "returned, count = %d\n", count));
if (count > 0) {
netsnmp_dispatch_external_events2(&count, &readfds,
&writefds, &exceptfds);
/* If there are still events leftover, process them */
if (count > 0) {
snmp_read2(&readfds);
}
} else
switch (count) {
case 0:
snmp_timeout();
break;
case -1:
DEBUGMSGTL(("snmpd/select", " errno = %d\n", errno));
if (errno == EINTR) {
/*
* likely that we got a signal. Check our special signal
* flags before retrying select.
*/
if (ams_running) {
goto reselect;
}
continue;
} else {
snmp_log_perror("select");
}
return -1;
default:
snmp_log(LOG_ERR, "select returned %d\n", count);
return -1;
} /* endif -- count>0 */
/*
* run requested alarms
*/
run_alarms();
netsnmp_check_outstanding_agent_requests();
}
/* lets give a seconb or 2 to log the shutdown */
sleep(0);
netsnmp_large_fd_set_cleanup(&readfds);
netsnmp_large_fd_set_cleanup(&writefds);
netsnmp_large_fd_set_cleanup(&exceptfds);
/*
* at shutdown time
*/
snmp_log(LOG_INFO, "Received TERM or STOP signal... shutting down...\n");
return 0;
} /* end receive() */
/*******************************************************************-o-******
* receive
*
* Parameters:
*
* Returns:
* 0 On success.
* -1 System error.
*
* Infinite while-loop which monitors incoming messges for the agent.
* Invoke the established message handlers for incoming messages on a per
* port basis. Handle timeouts.
*/
static int
receive(void)
{
int numfds;
fd_set fdset;
struct timeval timeout, *tvp = &timeout;
struct timeval sched, *svp = &sched,
now, *nvp = &now;
int count, block;
#ifdef USING_SMUX_MODULE
int i, sd;
#endif /* USING_SMUX_MODULE */
/*
* Set the 'sched'uled timeout to the current time + one TIMETICK.
*/
gettimeofday(nvp, (struct timezone *) NULL);
svp->tv_usec = nvp->tv_usec + TIMETICK;
svp->tv_sec = nvp->tv_sec;
while (svp->tv_usec >= ONE_SEC) {
svp->tv_usec -= ONE_SEC;
svp->tv_sec++;
}
/*
* Loop-forever: execute message handlers for sockets with data,
* reset the 'sched'uler.
*/
while (running) {
if (reconfig) {
reconfig = 0;
snmp_log(LOG_INFO, "Reconfiguring daemon\n");
update_config();
}
tvp = &timeout;
tvp->tv_sec = 0;
tvp->tv_usec = TIMETICK;
numfds = 0;
FD_ZERO(&fdset);
block = 0;
snmp_select_info(&numfds, &fdset, tvp, &block);
if (block == 1)
tvp = NULL; /* block without timeout */
#ifdef USING_SMUX_MODULE
if (smux_listen_sd >= 0) {
FD_SET(smux_listen_sd, &fdset);
numfds = smux_listen_sd >= numfds ? smux_listen_sd + 1 : numfds;
for (i = 0; i < sdlen; i++) {
FD_SET(sdlist[i], &fdset);
numfds = sdlist[i] >= numfds ? sdlist[i] + 1 : numfds;
}
}
#endif /* USING_SMUX_MODULE */
count = select(numfds, &fdset, 0, 0, tvp);
if (count > 0) {
snmp_read(&fdset);
} else switch(count) {
case 0:
snmp_timeout();
break;
case -1:
if (errno == EINTR) {
continue;
} else {
snmp_log_perror("select");
}
return -1;
default:
snmp_log(LOG_ERR, "select returned %d\n", count);
return -1;
} /* endif -- count>0 */
#ifdef USING_SMUX_MODULE
/* handle the SMUX sd's */
if (smux_listen_sd >= 0) {
for (i = 0; i < sdlen; i++) {
if (FD_ISSET(sdlist[i], &fdset)) {
if (smux_process(sdlist[i]) < 0) {
for (; i < (sdlen - 1); i++) {
sdlist[i] = sdlist[i+1];
}
sdlen--;
}
}
}
/* new connection */
if (FD_ISSET(smux_listen_sd, &fdset)) {
if ((sd = smux_accept(smux_listen_sd)) >= 0) {
sdlist[sdlen++] = sd;
}
}
}
#endif /* USING_SMUX_MODULE */
/*
* If the time 'now' is greater than the 'sched'uled time, then:
*
* Check alarm and event timers.
* Reset the 'sched'uled time to current time + one TIMETICK.
* Age the cache network addresses (from whom messges have
* been received).
*/
gettimeofday(nvp, (struct timezone *) NULL);
if (nvp->tv_sec > svp->tv_sec
|| (nvp->tv_sec == svp->tv_sec && nvp->tv_usec > svp->tv_usec)) {
svp->tv_usec = nvp->tv_usec + TIMETICK;
svp->tv_sec = nvp->tv_sec;
while (svp->tv_usec >= ONE_SEC) {
svp->tv_usec -= ONE_SEC;
svp->tv_sec++;
}
if (log_addresses && lastAddrAge++ > 600) {
lastAddrAge = 0;
for(count = 0; count < ADDRCACHE; count++) {
if (addrCache[count].status == OLD)
addrCache[count].status = UNUSED;
if (addrCache[count].status == USED)
addrCache[count].status = OLD;
}
}
} /* endif -- now>sched */
/* run requested alarms */
run_alarms();
} /* endwhile */
snmp_log(LOG_INFO, "Received TERM or STOP signal... shutting down...\n");
return 0;
} /* end receive() */
