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net-snmp/agent/agent_read_config.c

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/*
* agent_read_config.c
*
* Portions of this file are copyrighted by:
* Copyright (c) 2016 VMware, Inc. All rights reserved.
* Use is subject to license terms specified in the COPYING file
* distributed with the Net-SNMP package.
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-features.h>
#if HAVE_SYS_PARAM_H
#include <sys/param.h>
#else
#include <sys/types.h>
#endif
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_NETINET_IN_SYSTM_H
#include <netinet/in_systm.h>
#endif
#if HAVE_NETINET_IP_H
#include <netinet/ip.h>
#endif
#ifdef NETSNMP_ENABLE_IPV6
#if HAVE_NETINET_IP6_H
#include <netinet/ip6.h>
#endif
#endif
#if HAVE_SYS_QUEUE_H
#include <sys/queue.h>
#endif
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#if HAVE_SYS_SOCKETVAR_H
#ifndef dynix
#include <sys/socketvar.h>
#else
#include <sys/param.h>
#endif
#endif
#endif
#if HAVE_SYS_STREAM_H
# ifdef sysv5UnixWare7
# define _KMEMUSER 1 /* <sys/stream.h> needs this for queue_t */
# endif
#include <sys/stream.h>
#endif
#if HAVE_NET_ROUTE_H
#include <net/route.h>
#endif
#if HAVE_NETINET_IP_VAR_H
#include <netinet/ip_var.h>
#endif
#ifdef NETSNMP_ENABLE_IPV6
#if HAVE_NETNETSNMP_ENABLE_IPV6_IP6_VAR_H
#include <netinet6/ip6_var.h>
#endif
#endif
#if HAVE_NETINET_IN_PCB_H
#include <netinet/in_pcb.h>
#endif
#if HAVE_INET_MIB2_H
#include <inet/mib2.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include "mibgroup/struct.h"
#include <net-snmp/agent/agent_trap.h>
#include "snmpd.h"
#include <net-snmp/agent/agent_callbacks.h>
#include <net-snmp/agent/table.h>
#include <net-snmp/agent/table_iterator.h>
#include <net-snmp/agent/table_data.h>
#include <net-snmp/agent/table_dataset.h>
#include "agent_module_includes.h"
#include "mib_module_includes.h"
netsnmp_feature_child_of(agent_read_config_all, libnetsnmpagent)
netsnmp_feature_child_of(snmpd_unregister_config_handler, agent_read_config_all)
#ifdef HAVE_UNISTD_H
void
snmpd_set_agent_user(const char *token, char *cptr)
{
if (cptr[0] == '#') {
char *ecp;
int uid;
uid = strtoul(cptr + 1, &ecp, 10);
if (*ecp != 0) {
config_perror("Bad number");
} else {
netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_USERID, uid);
}
#if defined(HAVE_GETPWNAM) && defined(HAVE_PWD_H)
} else {
struct passwd *info;
info = getpwnam(cptr);
if (info)
netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_USERID, info->pw_uid);
else
config_perror("User not found in passwd database");
endpwent();
#endif
}
}
void
snmpd_set_agent_group(const char *token, char *cptr)
{
if (cptr[0] == '#') {
char *ecp;
int gid = strtoul(cptr + 1, &ecp, 10);
if (*ecp != 0) {
config_perror("Bad number");
} else {
netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_GROUPID, gid);
}
#if defined(HAVE_GETGRNAM) && defined(HAVE_GRP_H)
} else {
struct group *info;
info = getgrnam(cptr);
if (info)
netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_GROUPID, info->gr_gid);
else
config_perror("Group not found in group database");
endgrent();
#endif
}
}
#endif
#ifndef NETSNMP_NO_LISTEN_SUPPORT
void
snmpd_set_agent_address(const char *token, char *cptr)
{
char buf[SPRINT_MAX_LEN];
char *ptr;
/*
* has something been specified before?
*/
ptr = netsnmp_ds_get_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_PORTS);
if (ptr) {
/*
* append to the older specification string
*/
snprintf(buf, sizeof(buf), "%s,%s", ptr, cptr);
buf[sizeof(buf) - 1] = '\0';
} else {
strlcpy(buf, cptr, sizeof(buf));
}
DEBUGMSGTL(("snmpd_ports", "port spec: %s\n", buf));
netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_PORTS, buf);
}
#endif /* NETSNMP_NO_LISTEN_SUPPORT */
void
init_agent_read_config(const char *app)
{
if (app != NULL) {
netsnmp_ds_set_string(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_APPTYPE, app);
} else {
app = netsnmp_ds_get_string(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_APPTYPE);
}
register_app_config_handler("authtrapenable",
snmpd_parse_config_authtrap, NULL,
"1 | 2\t\t(1 = enable, 2 = disable)");
register_app_config_handler("pauthtrapenable",
snmpd_parse_config_authtrap, NULL, NULL);
if (netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_ROLE) == MASTER_AGENT) {
#ifndef NETSNMP_DISABLE_SNMPV1
register_app_config_handler("trapsink",
snmpd_parse_config_trapsink,
snmpd_free_trapsinks,
"[-profile p] [-name n] [-tag t] host [community] [port]");
#endif
#ifndef NETSNMP_DISABLE_SNMPV2C
register_app_config_handler("trap2sink",
snmpd_parse_config_trap2sink,
snmpd_free_trapsinks,
"[-profile p] [-name n] [-tag t] host [community] [port]");
register_app_config_handler("informsink",
snmpd_parse_config_informsink,
snmpd_free_trapsinks,
"[-profile p] [-name n] [-tag t] host [community] [port]");
#endif
register_app_config_handler("trapsess",
snmpd_parse_config_trapsess,
snmpd_free_trapsinks,
"[-profile p] [-name n] [-tag t] [snmpcmdargs] host");
}
#if !defined(NETSNMP_DISABLE_SNMPV1) || !defined(NETSNMP_DISABLE_SNMPV2C)
register_app_config_handler("trapcommunity",
snmpd_parse_config_trapcommunity,
snmpd_free_trapcommunity,
"community-string");
#endif /* support for community based SNMP */
netsnmp_ds_register_config(ASN_OCTET_STR, app, "v1trapaddress",
NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_TRAP_ADDR);
#ifdef HAVE_UNISTD_H
register_app_config_handler("agentuser",
snmpd_set_agent_user, NULL, "userid");
register_app_config_handler("agentgroup",
snmpd_set_agent_group, NULL, "groupid");
#endif
#ifndef NETSNMP_NO_LISTEN_SUPPORT
register_app_config_handler("agentaddress",
snmpd_set_agent_address, NULL,
"SNMP bind address");
#endif /* NETSNMP_NO_LISTEN_SUPPORT */
netsnmp_ds_register_config(ASN_BOOLEAN, app, "quit",
NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_QUIT_IMMEDIATELY);
netsnmp_ds_register_config(ASN_BOOLEAN, app, "leave_pidfile",
NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_LEAVE_PIDFILE);
netsnmp_ds_register_config(ASN_BOOLEAN, app, "dontLogTCPWrappersConnects",
NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_DONT_LOG_TCPWRAPPERS_CONNECTS);
netsnmp_ds_register_config(ASN_INTEGER, app, "maxGetbulkRepeats",
NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_MAX_GETBULKREPEATS);
netsnmp_ds_register_config(ASN_INTEGER, app, "maxGetbulkResponses",
NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_MAX_GETBULKRESPONSES);
netsnmp_ds_register_config(ASN_INTEGER, app, "avgBulkVarbindSize",
NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_AVG_BULKVARBINDSIZE);
#ifndef NETSNMP_NO_PDU_STATS
netsnmp_ds_register_config(ASN_INTEGER, app, "pduStatsMax",
NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_PDU_STATS_MAX);
netsnmp_ds_register_config(ASN_INTEGER, app, "pduStatsThreshold",
NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_PDU_STATS_THRESHOLD);
#endif /* NETSNMP_NO_PDU_STATS */
netsnmp_init_handler_conf();
#include "agent_module_dot_conf.h"
#include "mib_module_dot_conf.h"
#ifdef TESTING
print_config_handlers();
#endif
}
void
update_config(void)
{
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_PRE_UPDATE_CONFIG, NULL);
free_config();
read_configs();
}
void
snmpd_register_config_handler(const char *token,
void (*parser) (const char *, char *),
void (*releaser) (void), const char *help)
{
DEBUGMSGTL(("snmpd_register_app_config_handler",
"registering .conf token for \"%s\"\n", token));
register_app_config_handler(token, parser, releaser, help);
}
void
snmpd_register_const_config_handler(const char *token,
void (*parser) (const char *, const char *),
void (*releaser) (void), const char *help)
{
DEBUGMSGTL(("snmpd_register_app_config_handler",
"registering .conf token for \"%s\"\n", token));
register_app_config_handler(token, (void(*)(const char *, char *))parser,
releaser, help);
}
#ifdef NETSNMP_FEATURE_REQUIRE_SNMPD_UNREGISTER_CONFIG_HANDLER
netsnmp_feature_require(unregister_app_config_handler)
#endif /* NETSNMP_FEATURE_REQUIRE_SNMPD_UNREGISTER_CONFIG_HANDLER */
#ifndef NETSNMP_FEATURE_REMOVE_SNMPD_UNREGISTER_CONFIG_HANDLER
void
snmpd_unregister_config_handler(const char *token)
{
unregister_app_config_handler(token);
}
#endif /* NETSNMP_FEATURE_REMOVE_SNMPD_UNREGISTER_CONFIG_HANDLER */
/*
* this function is intended for use by mib-modules to store permenant
* configuration information generated by sets or persistent counters
*/
void
snmpd_store_config(const char *line)
{
read_app_config_store(line);
}
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