/* $OpenBSD: snmpd.h,v 1.24 2009/06/06 05:52:01 pyr Exp $ */ /* * Copyright (c) 2007, 2008 Reyk Floeter * Copyright (c) 2003, 2004 Henning Brauer * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #ifndef _SNMPD_H #define _SNMPD_H #include #include #include #include #include #include "imsg.h" /* * common definitions for snmpd */ #define CONF_FILE "/etc/snmpd.conf" #define SNMPD_SOCKET "/var/run/snmpd.sock" #define SNMPD_USER "_snmpd" #define SNMPD_PORT 161 #define SNMPD_TRAPPORT 162 #define SNMPD_MAXSTRLEN 484 #define SNMPD_MAXCOMMUNITYLEN SNMPD_MAXSTRLEN #define SNMPD_MAXVARBIND 0x7fffffff #define SNMPD_MAXVARBINDLEN 1210 #define SMALL_READ_BUF_SIZE 1024 #define READ_BUF_SIZE 65535 #define RT_BUF_SIZE 16384 #define MAX_RTSOCK_BUF (128 * 1024) enum imsg_type { IMSG_NONE, IMSG_CTL_OK, /* answer to snmpctl requests */ IMSG_CTL_FAIL, IMSG_CTL_END, IMSG_CTL_NOTIFY }; enum { PROC_PARENT, /* Parent process and application interface */ PROC_SNMPE /* SNMP engine */ } snmpd_process; /* initially control.h */ struct control_sock { const char *cs_name; struct event cs_ev; int cs_fd; int cs_restricted; }; enum blockmodes { BM_NORMAL, BM_NONBLOCK }; struct imsgev { struct imsgbuf ibuf; void (*handler)(int, short, void *); struct event ev; void *data; short events; }; struct ctl_conn { TAILQ_ENTRY(ctl_conn) entry; u_int8_t flags; #define CTL_CONN_NOTIFY 0x01 #define CTL_CONN_LOCKED 0x02 /* restricted mode */ struct imsgev iev; }; TAILQ_HEAD(ctl_connlist, ctl_conn); extern struct ctl_connlist ctl_conns; /* * kroute */ struct kroute { struct in_addr prefix; struct in_addr nexthop; u_int16_t flags; u_int16_t rtlabel; u_short if_index; u_int8_t prefixlen; u_long ticks; }; struct kif_addr { u_short if_index; struct in_addr addr; struct in_addr mask; struct in_addr dstbrd; TAILQ_ENTRY(kif_addr) entry; RB_ENTRY(kif_addr) node; }; struct kif { char if_name[IF_NAMESIZE]; char if_descr[IFDESCRSIZE]; u_int8_t if_lladdr[ETHER_ADDR_LEN]; int if_flags; u_short if_index; u_int8_t if_nhreachable; /* for nexthop verification */ u_long if_ticks; struct if_data if_data; }; #define F_OSPFD_INSERTED 0x0001 #define F_KERNEL 0x0002 #define F_BGPD_INSERTED 0x0004 #define F_CONNECTED 0x0008 #define F_DOWN 0x0010 #define F_STATIC 0x0020 #define F_DYNAMIC 0x0040 #define F_REDISTRIBUTED 0x0100 /* * Message Processing Subsystem (mps) */ struct oid { struct ber_oid o_id; #define o_oid o_id.bo_id #define o_oidlen o_id.bo_n char *o_name; u_int o_flags; int (*o_get)(struct oid *, struct ber_oid *, struct ber_element **); int (*o_set)(struct oid *, struct ber_oid *, struct ber_element **); struct ber_oid *(*o_table)(struct oid *, struct ber_oid *, struct ber_oid *); long long o_val; void *o_data; RB_ENTRY(oid) o_element; }; #define OID_ROOT 0x00 #define OID_RD 0x01 #define OID_WR 0x02 #define OID_IFSET 0x04 /* only if user-specified value */ #define OID_DYNAMIC 0x08 /* free allocated data */ #define OID_TABLE 0x10 /* dynamic sub-elements */ #define OID_MIB 0x20 /* root-OID of a supported MIB */ #define OID_KEY 0x40 /* lookup tables */ #define OID_RS (OID_RD|OID_IFSET) #define OID_WS (OID_WR|OID_IFSET) #define OID_RW (OID_RD|OID_WR) #define OID_RWS (OID_RW|OID_IFSET) #define OID_TRD (OID_RD|OID_TABLE) #define OID_TWR (OID_WR|OID_TABLE) #define OID_TRS (OID_RD|OID_IFSET|OID_TABLE) #define OID_TWS (OID_WR|OID_IFSET|OID_TABLE) #define OID_TRW (OID_RD|OID_WR|OID_TABLE) #define OID_TRWS (OID_RW|OID_IFSET|OID_TABLE) #define OID_NOTSET(_oid) \ (((_oid)->o_flags & OID_IFSET) && \ ((_oid)->o_data == NULL) && ((_oid)->o_val == 0)) #define OID(...) { { __VA_ARGS__ } } #define MIBDECL(...) { { MIB_##__VA_ARGS__ } }, #__VA_ARGS__ #define MIB(...) { { MIB_##__VA_ARGS__ } }, NULL #define MIBEND { { 0 } }, NULL /* * daemon structures */ struct snmp_message { u_int sm_version; char sm_community[SNMPD_MAXCOMMUNITYLEN]; u_int sm_context; struct ber_element *sm_header; struct ber_element *sm_headerend; long long sm_request; long long sm_error; #define sm_nonrepeaters sm_error long long sm_errorindex; #define sm_maxrepetitions sm_errorindex struct ber_element *sm_pdu; struct ber_element *sm_pduend; struct ber_element *sm_varbind; struct ber_element *sm_varbindresp; }; /* Defined in SNMPv2-MIB.txt (RFC 3418) */ struct snmp_stats { u_int32_t snmp_inpkts; u_int32_t snmp_outpkts; u_int32_t snmp_inbadversions; u_int32_t snmp_inbadcommunitynames; u_int32_t snmp_inbadcommunityuses; u_int32_t snmp_inasnparseerrs; u_int32_t snmp_intoobigs; u_int32_t snmp_innosuchnames; u_int32_t snmp_inbadvalues; u_int32_t snmp_inreadonlys; u_int32_t snmp_ingenerrs; u_int32_t snmp_intotalreqvars; u_int32_t snmp_intotalsetvars; u_int32_t snmp_ingetrequests; u_int32_t snmp_ingetnexts; u_int32_t snmp_insetrequests; u_int32_t snmp_ingetresponses; u_int32_t snmp_intraps; u_int32_t snmp_outtoobigs; u_int32_t snmp_outnosuchnames; u_int32_t snmp_outbadvalues; u_int32_t snmp_outgenerrs; u_int32_t snmp_outgetrequests; u_int32_t snmp_outgetnexts; u_int32_t snmp_outsetrequests; u_int32_t snmp_outgetresponses; u_int32_t snmp_outtraps; int snmp_enableauthentraps; u_int32_t snmp_silentdrops; u_int32_t snmp_proxydrops; }; struct address { struct sockaddr_storage ss; in_port_t port; TAILQ_ENTRY(address) entry; /* For SNMP trap receivers etc. */ char *sa_community; struct ber_oid *sa_oid; }; TAILQ_HEAD(addresslist, address); struct snmpd { u_int8_t sc_flags; #define SNMPD_F_VERBOSE 0x01 #define SNMPD_F_NONAMES 0x02 const char *sc_confpath; struct address sc_address; int sc_sock; struct event sc_ev; struct timeval sc_starttime; struct control_sock sc_csock; struct control_sock sc_rcsock; char sc_rdcommunity[SNMPD_MAXCOMMUNITYLEN]; char sc_rwcommunity[SNMPD_MAXCOMMUNITYLEN]; char sc_trcommunity[SNMPD_MAXCOMMUNITYLEN]; struct snmp_stats sc_stats; struct addresslist sc_trapreceivers; int sc_ncpu; int64_t *sc_cpustates; }; /* control.c */ int control_init(struct control_sock *); int control_listen(struct control_sock *); void control_accept(int, short, void *); void control_dispatch_imsg(int, short, void *); void control_imsg_forward(struct imsg *); void control_cleanup(struct control_sock *); void session_socket_blockmode(int, enum blockmodes); /* parse.y */ struct snmpd *parse_config(const char *, u_int); int cmdline_symset(char *); /* log.c */ void log_init(int); void log_warn(const char *, ...); void log_warnx(const char *, ...); void log_info(const char *, ...); void log_debug(const char *, ...); __dead void fatal(const char *); __dead void fatalx(const char *); const char *print_host(struct sockaddr_storage *, char *, size_t); void imsg_event_add(struct imsgev *); int imsg_compose_event(struct imsgev *, enum imsg_type, u_int32_t, pid_t, int, void *, u_int16_t); /* kroute.c */ int kr_init(void); void kr_shutdown(void); int kr_updateif(u_int); u_int kr_ifnumber(void); u_long kr_iflastchange(void); struct kif *kr_getif(u_short); struct kif *kr_getnextif(u_short); struct kif_addr *kr_getaddr(struct in_addr *); struct kif_addr *kr_getnextaddr(struct in_addr *); /* snmpe.c */ pid_t snmpe(struct snmpd *, int [2]); void snmpe_debug_elements(struct ber_element *); /* trap.c */ void trap_init(void); int trap_imsg(struct imsgev *, pid_t); int trap_send(struct ber_oid *, struct ber_element *); /* mps.c */ struct ber_element * mps_getreq(struct ber_element *, struct ber_oid *); struct ber_element * mps_getnextreq(struct ber_element *, struct ber_oid *); int mps_setreq(struct ber_element *, struct ber_oid *); int mps_set(struct ber_oid *, void *, long long); int mps_getstr(struct oid *, struct ber_oid *, struct ber_element **); int mps_setstr(struct oid *, struct ber_oid *, struct ber_element **); int mps_getint(struct oid *, struct ber_oid *, struct ber_element **); int mps_setint(struct oid *, struct ber_oid *, struct ber_element **); int mps_getts(struct oid *, struct ber_oid *, struct ber_element **); void mps_encodeinaddr(struct ber_oid *, struct in_addr *, int); void mps_decodeinaddr(struct ber_oid *, struct in_addr *, int); struct ber_oid *mps_table(struct oid *, struct ber_oid *, struct ber_oid *); /* smi.c */ int smi_init(void); u_long smi_getticks(void); void smi_mibtree(struct oid *); struct oid *smi_find(struct oid *); struct oid *smi_next(struct oid *); struct oid *smi_foreach(struct oid *, u_int); void smi_oidlen(struct ber_oid *); char *smi_oidstring(struct ber_oid *, char *, size_t); void smi_delete(struct oid *); void smi_insert(struct oid *); int smi_oid_cmp(struct oid *, struct oid *); /* timer.c */ void timer_init(void); /* snmpd.c */ int snmpd_socket_af(struct sockaddr_storage *, in_port_t); #endif /* _SNMPD_H */