/* * Copyright (c) 2001-2003 * Fraunhofer Institute for Open Communication Systems (FhG Fokus). * All rights reserved. * * Author: Harti Brandt * * Copyright (c) 2010 The FreeBSD Foundation * All rights reserved. * * Portions of this software were developed by Shteryana Sotirova Shopova * under sponsorship from the FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $Begemot: bsnmp/snmpd/main.c,v 1.100 2006/02/14 09:04:20 brandt_h Exp $ * * SNMPd main stuff. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef USE_TCPWRAPPERS #include #include #endif #include "support.h" #include "snmpmod.h" #include "snmpd.h" #include "tree.h" #include "oid.h" #include "trans_inet.h" #define PATH_PID "/var/run/%s.pid" #define PATH_CONFIG "/etc/%s.config" #define PATH_ENGINE "/var/%s.engine" uint64_t this_tick; /* start of processing of current packet (absolute) */ uint64_t start_tick; /* start of processing */ struct systemg systemg = { NULL, { 8, { 1, 3, 6, 1, 4, 1, 1115, 7352 }}, NULL, NULL, NULL, 64 + 8 + 4, 0 }; struct debug debug = { 0, /* dump_pdus */ LOG_DEBUG, /* log_pri */ 0, /* evdebug */ }; struct snmpd snmpd = { 2048, /* txbuf */ 2048, /* rxbuf */ 0, /* comm_dis */ 0, /* auth_traps */ {0, 0, 0, 0}, /* trap1addr */ VERS_ENABLE_ALL,/* version_enable */ }; struct snmpd_stats snmpd_stats; struct snmpd_usmstat snmpd_usmstats; /* snmpEngine */ struct snmp_engine snmpd_engine; /* snmpSerialNo */ int32_t snmp_serial_no; struct snmpd_target_stats snmpd_target_stats; /* search path for config files */ const char *syspath = PATH_SYSCONFIG; /* list of all loaded modules */ struct lmodules lmodules = TAILQ_HEAD_INITIALIZER(lmodules); /* list of loaded modules during start-up in the order they were loaded */ static struct lmodules modules_start = TAILQ_HEAD_INITIALIZER(modules_start); /* list of all known communities */ struct community_list community_list = TAILQ_HEAD_INITIALIZER(community_list); /* list of all known USM users */ static struct usm_userlist usm_userlist = SLIST_HEAD_INITIALIZER(usm_userlist); /* A list of all VACM users configured, including v1, v2c and v3 */ static struct vacm_userlist vacm_userlist = SLIST_HEAD_INITIALIZER(vacm_userlist); /* A list of all VACM groups */ static struct vacm_grouplist vacm_grouplist = SLIST_HEAD_INITIALIZER(vacm_grouplist); static struct vacm_group vacm_default_group = { .groupname = "", }; /* The list of configured access entries */ static struct vacm_accesslist vacm_accesslist = TAILQ_HEAD_INITIALIZER(vacm_accesslist); /* The list of configured views */ static struct vacm_viewlist vacm_viewlist = SLIST_HEAD_INITIALIZER(vacm_viewlist); /* The list of configured contexts */ static struct vacm_contextlist vacm_contextlist = SLIST_HEAD_INITIALIZER(vacm_contextlist); /* list of all installed object resources */ struct objres_list objres_list = TAILQ_HEAD_INITIALIZER(objres_list); /* community value generator */ static u_int next_community_index = 1; /* list of all known ranges */ struct idrange_list idrange_list = TAILQ_HEAD_INITIALIZER(idrange_list); /* identifier generator */ u_int next_idrange = 1; /* list of all current timers */ struct timer_list timer_list = LIST_HEAD_INITIALIZER(timer_list); /* list of file descriptors */ struct fdesc_list fdesc_list = LIST_HEAD_INITIALIZER(fdesc_list); /* program arguments */ static char **progargs; static int nprogargs; /* current community */ u_int community; static struct community *comm; /* current USM user */ struct usm_user *usm_user; /* file names */ static char config_file[MAXPATHLEN + 1]; static char pid_file[MAXPATHLEN + 1]; char engine_file[MAXPATHLEN + 1]; #ifndef USE_LIBBEGEMOT /* event context */ static evContext evctx; #endif /* signal mask */ static sigset_t blocked_sigs; /* signal handling */ static int work; #define WORK_DOINFO 0x0001 #define WORK_RECONFIG 0x0002 /* oids */ static const struct asn_oid oid_snmpMIB = OIDX_snmpMIB, oid_begemotSnmpd = OIDX_begemotSnmpd, oid_coldStart = OIDX_coldStart, oid_authenticationFailure = OIDX_authenticationFailure; const struct asn_oid oid_zeroDotZero = { 2, { 0, 0 }}; const struct asn_oid oid_usmUnknownEngineIDs = { 11, { 1, 3, 6, 1, 6, 3, 15, 1, 1, 4, 0}}; const struct asn_oid oid_usmNotInTimeWindows = { 11, { 1, 3, 6, 1, 6, 3, 15, 1, 1, 2, 0}}; /* request id generator for traps */ u_int trap_reqid; /* help text */ static const char usgtxt[] = "\ Begemot simple SNMP daemon. Copyright (c) 2001-2002 Fraunhofer Institute for\n\ Open Communication Systems (FhG Fokus). All rights reserved.\n\ Copyright (c) 2010 The FreeBSD Foundation. All rights reserved.\n\ usage: snmpd [-dh] [-c file] [-D options] [-e file] [-I path]\n\ [-l prefix] [-m variable=value] [-p file]\n\ options:\n\ -d don't daemonize\n\ -h print this info\n\ -c file specify configuration file\n\ -D options debugging options\n\ -e file specify engine id file\n\ -I path system include path\n\ -l prefix default basename for pid and config file\n\ -m var=val define variable\n\ -p file specify pid file\n\ "; /* hosts_access(3) request */ #ifdef USE_TCPWRAPPERS static struct request_info req; #endif /* transports */ extern const struct transport_def udp_trans; extern const struct transport_def lsock_trans; struct transport_list transport_list = TAILQ_HEAD_INITIALIZER(transport_list); /* forward declarations */ static void snmp_printf_func(const char *fmt, ...); static void snmp_error_func(const char *err, ...); static void snmp_debug_func(const char *err, ...); static void asn_error_func(const struct asn_buf *b, const char *err, ...); /* * Allocate rx/tx buffer. We allocate one byte more for rx. */ void * buf_alloc(int tx) { void *buf; if ((buf = malloc(tx ? snmpd.txbuf : snmpd.rxbuf)) == NULL) { syslog(LOG_CRIT, "cannot allocate buffer"); if (tx) snmpd_stats.noTxbuf++; else snmpd_stats.noRxbuf++; return (NULL); } return (buf); } /* * Return the buffer size. */ size_t buf_size(int tx) { return (tx ? snmpd.txbuf : snmpd.rxbuf); } /* * Prepare a PDU for output */ void snmp_output(struct snmp_pdu *pdu, u_char *sndbuf, size_t *sndlen, const char *dest) { struct asn_buf resp_b; enum snmp_code code; resp_b.asn_ptr = sndbuf; resp_b.asn_len = snmpd.txbuf; if ((code = snmp_pdu_encode(pdu, &resp_b)) != SNMP_CODE_OK) { syslog(LOG_ERR, "cannot encode message (code=%d)", code); abort(); } if (debug.dump_pdus) { snmp_printf("%s <- ", dest); snmp_pdu_dump(pdu); } *sndlen = (size_t)(resp_b.asn_ptr - sndbuf); } /* * Check USM PDU header credentials against local SNMP Engine & users. */ static enum snmp_code snmp_pdu_auth_user(struct snmp_pdu *pdu) { usm_user = NULL; /* un-authenticated snmpEngineId discovery */ if (pdu->engine.engine_len == 0 && strlen(pdu->user.sec_name) == 0) { pdu->engine.engine_len = snmpd_engine.engine_len; memcpy(pdu->engine.engine_id, snmpd_engine.engine_id, snmpd_engine.engine_len); update_snmpd_engine_time(); pdu->engine.engine_boots = snmpd_engine.engine_boots; pdu->engine.engine_time = snmpd_engine.engine_time; pdu->flags |= SNMP_MSG_AUTODISCOVER; return (SNMP_CODE_OK); } if ((usm_user = usm_find_user(pdu->engine.engine_id, pdu->engine.engine_len, pdu->user.sec_name)) == NULL || usm_user->status != 1 /* active */) return (SNMP_CODE_BADUSER); if (usm_user->user_engine_len != snmpd_engine.engine_len || memcmp(usm_user->user_engine_id, snmpd_engine.engine_id, snmpd_engine.engine_len) != 0) return (SNMP_CODE_BADENGINE); pdu->user.priv_proto = usm_user->suser.priv_proto; memcpy(pdu->user.priv_key, usm_user->suser.priv_key, sizeof(pdu->user.priv_key)); /* authenticated snmpEngineId discovery */ if ((pdu->flags & SNMP_MSG_AUTH_FLAG) != 0) { update_snmpd_engine_time(); pdu->user.auth_proto = usm_user->suser.auth_proto; memcpy(pdu->user.auth_key, usm_user->suser.auth_key, sizeof(pdu->user.auth_key)); if (pdu->engine.engine_boots == 0 && pdu->engine.engine_time == 0) { update_snmpd_engine_time(); pdu->flags |= SNMP_MSG_AUTODISCOVER; return (SNMP_CODE_OK); } if (pdu->engine.engine_boots != snmpd_engine.engine_boots || abs(pdu->engine.engine_time - snmpd_engine.engine_time) > SNMP_TIME_WINDOW) return (SNMP_CODE_NOTINTIME); } if (((pdu->flags & SNMP_MSG_PRIV_FLAG) != 0 && (pdu->flags & SNMP_MSG_AUTH_FLAG) == 0) || ((pdu->flags & SNMP_MSG_AUTH_FLAG) == 0 && usm_user->suser.auth_proto != SNMP_AUTH_NOAUTH) || ((pdu->flags & SNMP_MSG_PRIV_FLAG) == 0 && usm_user->suser.priv_proto != SNMP_PRIV_NOPRIV)) return (SNMP_CODE_BADSECLEVEL); return (SNMP_CODE_OK); } /* * Check whether access to each of var bindings in the PDU is allowed based * on the user credentials against the configured User groups & VACM views. */ enum snmp_code snmp_pdu_auth_access(struct snmp_pdu *pdu, int32_t *ip) { const char *uname; int32_t suboid, smodel; uint32_t i; struct vacm_user *vuser; struct vacm_access *acl; struct vacm_context *vacmctx; struct vacm_view *view; /* * At least a default context exists if the snmpd_vacm(3) module is * running. */ if (SLIST_EMPTY(&vacm_contextlist) || (pdu->flags & SNMP_MSG_AUTODISCOVER) != 0) return (SNMP_CODE_OK); switch (pdu->version) { case SNMP_V1: if ((uname = comm_string(community)) == NULL) return (SNMP_CODE_FAILED); smodel = SNMP_SECMODEL_SNMPv1; break; case SNMP_V2c: if ((uname = comm_string(community)) == NULL) return (SNMP_CODE_FAILED); smodel = SNMP_SECMODEL_SNMPv2c; break; case SNMP_V3: uname = pdu->user.sec_name; if ((smodel = pdu->security_model) != SNMP_SECMODEL_USM) return (SNMP_CODE_FAILED); /* Compare the PDU context engine id against the agent's */ if (pdu->context_engine_len != snmpd_engine.engine_len || memcmp(pdu->context_engine, snmpd_engine.engine_id, snmpd_engine.engine_len) != 0) return (SNMP_CODE_FAILED); break; default: abort(); } SLIST_FOREACH(vuser, &vacm_userlist, vvu) if (strcmp(uname, vuser->secname) == 0 && vuser->sec_model == smodel) break; if (vuser == NULL || vuser->group == NULL) return (SNMP_CODE_FAILED); /* XXX: shteryana - recheck */ TAILQ_FOREACH_REVERSE(acl, &vacm_accesslist, vacm_accesslist, vva) { if (acl->group != vuser->group) continue; SLIST_FOREACH(vacmctx, &vacm_contextlist, vcl) if (memcmp(vacmctx->ctxname, acl->ctx_prefix, acl->ctx_match) == 0) goto match; } return (SNMP_CODE_FAILED); match: switch (pdu->type) { case SNMP_PDU_GET: case SNMP_PDU_GETNEXT: case SNMP_PDU_GETBULK: if ((view = acl->read_view) == NULL) return (SNMP_CODE_FAILED); break; case SNMP_PDU_SET: if ((view = acl->write_view) == NULL) return (SNMP_CODE_FAILED); break; case SNMP_PDU_TRAP: case SNMP_PDU_INFORM: case SNMP_PDU_TRAP2: case SNMP_PDU_REPORT: if ((view = acl->notify_view) == NULL) return (SNMP_CODE_FAILED); break; case SNMP_PDU_RESPONSE: /* NOTREACHED */ return (SNMP_CODE_FAILED); default: abort(); } for (i = 0; i < pdu->nbindings; i++) { /* XXX - view->mask*/ suboid = asn_is_suboid(&view->subtree, &pdu->bindings[i].var); if ((!suboid && !view->exclude) || (suboid && view->exclude)) { *ip = i + 1; return (SNMP_CODE_FAILED); } } return (SNMP_CODE_OK); } /* * SNMP input. Start: decode the PDU, find the user or community. */ enum snmpd_input_err snmp_input_start(const u_char *buf, size_t len, const char *source, struct snmp_pdu *pdu, int32_t *ip, size_t *pdulen) { struct asn_buf b; enum snmp_code code; enum snmpd_input_err ret; int sret; /* update uptime */ this_tick = get_ticks(); b.asn_cptr = buf; b.asn_len = len; ret = SNMPD_INPUT_OK; /* look whether we have enough bytes for the entire PDU. */ switch (sret = snmp_pdu_snoop(&b)) { case 0: return (SNMPD_INPUT_TRUNC); case -1: snmpd_stats.inASNParseErrs++; return (SNMPD_INPUT_FAILED); } b.asn_len = *pdulen = (size_t)sret; memset(pdu, 0, sizeof(*pdu)); if ((code = snmp_pdu_decode_header(&b, pdu)) != SNMP_CODE_OK) goto decoded; if (pdu->version == SNMP_V3) { if (pdu->security_model != SNMP_SECMODEL_USM) { code = SNMP_CODE_FAILED; goto decoded; } if ((code = snmp_pdu_auth_user(pdu)) != SNMP_CODE_OK) goto decoded; if ((code = snmp_pdu_decode_secmode(&b, pdu)) != SNMP_CODE_OK) goto decoded; } code = snmp_pdu_decode_scoped(&b, pdu, ip); decoded: snmpd_stats.inPkts++; switch (code) { case SNMP_CODE_FAILED: snmpd_stats.inASNParseErrs++; return (SNMPD_INPUT_FAILED); case SNMP_CODE_BADVERS: bad_vers: snmpd_stats.inBadVersions++; return (SNMPD_INPUT_FAILED); case SNMP_CODE_BADLEN: if (pdu->type == SNMP_OP_SET) ret = SNMPD_INPUT_VALBADLEN; break; case SNMP_CODE_OORANGE: if (pdu->type == SNMP_OP_SET) ret = SNMPD_INPUT_VALRANGE; break; case SNMP_CODE_BADENC: if (pdu->type == SNMP_OP_SET) ret = SNMPD_INPUT_VALBADENC; break; case SNMP_CODE_BADSECLEVEL: snmpd_usmstats.unsupported_seclevels++; return (SNMPD_INPUT_FAILED); case SNMP_CODE_NOTINTIME: snmpd_usmstats.not_in_time_windows++; return (SNMPD_INPUT_FAILED); case SNMP_CODE_BADUSER: snmpd_usmstats.unknown_users++; return (SNMPD_INPUT_FAILED); case SNMP_CODE_BADENGINE: snmpd_usmstats.unknown_engine_ids++; return (SNMPD_INPUT_FAILED); case SNMP_CODE_BADDIGEST: snmpd_usmstats.wrong_digests++; return (SNMPD_INPUT_FAILED); case SNMP_CODE_EDECRYPT: snmpd_usmstats.decrypt_errors++; return (SNMPD_INPUT_FAILED); case SNMP_CODE_OK: switch (pdu->version) { case SNMP_V1: if (!(snmpd.version_enable & VERS_ENABLE_V1)) goto bad_vers; break; case SNMP_V2c: if (!(snmpd.version_enable & VERS_ENABLE_V2C)) goto bad_vers; break; case SNMP_V3: if (!(snmpd.version_enable & VERS_ENABLE_V3)) goto bad_vers; break; case SNMP_Verr: goto bad_vers; } break; } if (debug.dump_pdus) { snmp_printf("%s -> ", source); snmp_pdu_dump(pdu); } /* * Look, whether we know the community or user */ if (pdu->version != SNMP_V3) { TAILQ_FOREACH(comm, &community_list, link) if (comm->string != NULL && strcmp(comm->string, pdu->community) == 0) break; if (comm == NULL) { snmpd_stats.inBadCommunityNames++; snmp_pdu_free(pdu); if (snmpd.auth_traps) snmp_send_trap(&oid_authenticationFailure, (struct snmp_value *)NULL); ret = SNMPD_INPUT_BAD_COMM; } else community = comm->value; } else if (pdu->nbindings == 0) { /* RFC 3414 - snmpEngineID Discovery */ if (strlen(pdu->user.sec_name) == 0) { asn_append_oid(&(pdu->bindings[pdu->nbindings++].var), &oid_usmUnknownEngineIDs); pdu->context_engine_len = snmpd_engine.engine_len; memcpy(pdu->context_engine, snmpd_engine.engine_id, snmpd_engine.engine_len); } else if (pdu->engine.engine_boots == 0 && pdu->engine.engine_time == 0) { asn_append_oid(&(pdu->bindings[pdu->nbindings++].var), &oid_usmNotInTimeWindows); update_snmpd_engine_time(); pdu->engine.engine_boots = snmpd_engine.engine_boots; pdu->engine.engine_time = snmpd_engine.engine_time; } } else if (pdu->user.auth_proto != SNMP_AUTH_NOAUTH && (pdu->engine.engine_boots == 0 || pdu->engine.engine_time == 0)) { snmpd_usmstats.not_in_time_windows++; ret = SNMPD_INPUT_FAILED; } if ((code = snmp_pdu_auth_access(pdu, ip)) != SNMP_CODE_OK) ret = SNMPD_INPUT_FAILED; return (ret); } /* * Will return only _OK or _FAILED */ enum snmpd_input_err snmp_input_finish(struct snmp_pdu *pdu, const u_char *rcvbuf, size_t rcvlen, u_char *sndbuf, size_t *sndlen, const char *source, enum snmpd_input_err ierr, int32_t ivar, void *data) { struct snmp_pdu resp; struct asn_buf resp_b, pdu_b; enum snmp_ret ret; resp_b.asn_ptr = sndbuf; resp_b.asn_len = snmpd.txbuf; pdu_b.asn_cptr = rcvbuf; pdu_b.asn_len = rcvlen; if (ierr != SNMPD_INPUT_OK) { /* error decoding the input of a SET */ if (pdu->version == SNMP_V1) pdu->error_status = SNMP_ERR_BADVALUE; else if (ierr == SNMPD_INPUT_VALBADLEN) pdu->error_status = SNMP_ERR_WRONG_LENGTH; else if (ierr == SNMPD_INPUT_VALRANGE) pdu->error_status = SNMP_ERR_WRONG_VALUE; else pdu->error_status = SNMP_ERR_WRONG_ENCODING; pdu->error_index = ivar; if (snmp_make_errresp(pdu, &pdu_b, &resp_b) == SNMP_RET_IGN) { syslog(LOG_WARNING, "could not encode error response"); snmpd_stats.silentDrops++; return (SNMPD_INPUT_FAILED); } if (debug.dump_pdus) { snmp_printf("%s <- ", source); snmp_pdu_dump(pdu); } *sndlen = (size_t)(resp_b.asn_ptr - sndbuf); return (SNMPD_INPUT_OK); } switch (pdu->type) { case SNMP_PDU_GET: ret = snmp_get(pdu, &resp_b, &resp, data); break; case SNMP_PDU_GETNEXT: ret = snmp_getnext(pdu, &resp_b, &resp, data); break; case SNMP_PDU_SET: ret = snmp_set(pdu, &resp_b, &resp, data); break; case SNMP_PDU_GETBULK: ret = snmp_getbulk(pdu, &resp_b, &resp, data); break; default: ret = SNMP_RET_IGN; break; } switch (ret) { case SNMP_RET_OK: /* normal return - send a response */ if (debug.dump_pdus) { snmp_printf("%s <- ", source); snmp_pdu_dump(&resp); } *sndlen = (size_t)(resp_b.asn_ptr - sndbuf); snmp_pdu_free(&resp); return (SNMPD_INPUT_OK); case SNMP_RET_IGN: /* error - send nothing */ snmpd_stats.silentDrops++; return (SNMPD_INPUT_FAILED); case SNMP_RET_ERR: /* error - send error response. The snmp routine has * changed the error fields in the original message. */ resp_b.asn_ptr = sndbuf; resp_b.asn_len = snmpd.txbuf; if (snmp_make_errresp(pdu, &pdu_b, &resp_b) == SNMP_RET_IGN) { syslog(LOG_WARNING, "could not encode error response"); snmpd_stats.silentDrops++; return (SNMPD_INPUT_FAILED); } else { if (debug.dump_pdus) { snmp_printf("%s <- ", source); snmp_pdu_dump(pdu); } *sndlen = (size_t)(resp_b.asn_ptr - sndbuf); return (SNMPD_INPUT_OK); } } abort(); } /* * Insert a port into the right place in the transport's table of ports */ void trans_insert_port(struct transport *t, struct tport *port) { struct tport *p; port->transport = t; TAILQ_FOREACH(p, &t->table, link) { if (asn_compare_oid(&p->index, &port->index) > 0) { TAILQ_INSERT_BEFORE(p, port, link); return; } } TAILQ_INSERT_TAIL(&t->table, port, link); } /* * Remove a port from a transport's list */ void trans_remove_port(struct tport *port) { TAILQ_REMOVE(&port->transport->table, port, link); } /* * Find a port on a transport's list */ struct tport * trans_find_port(struct transport *t, const struct asn_oid *idx, u_int sub) { return (FIND_OBJECT_OID(&t->table, idx, sub)); } /* * Find next port on a transport's list */ struct tport * trans_next_port(struct transport *t, const struct asn_oid *idx, u_int sub) { return (NEXT_OBJECT_OID(&t->table, idx, sub)); } /* * Return first port */ struct tport * trans_first_port(struct transport *t) { return (TAILQ_FIRST(&t->table)); } /* * Iterate through all ports until a function returns a 0. */ struct tport * trans_iter_port(struct transport *t, int (*func)(struct tport *, intptr_t), intptr_t arg) { struct tport *p; TAILQ_FOREACH(p, &t->table, link) if (func(p, arg) == 0) return (p); return (NULL); } /* * Register a transport */ int trans_register(const struct transport_def *def, struct transport **pp) { u_int i; char or_descr[256]; if ((*pp = malloc(sizeof(**pp))) == NULL) return (SNMP_ERR_GENERR); /* construct index */ (*pp)->index.len = strlen(def->name) + 1; (*pp)->index.subs[0] = strlen(def->name); for (i = 0; i < (*pp)->index.subs[0]; i++) (*pp)->index.subs[i + 1] = def->name[i]; (*pp)->vtab = def; if (FIND_OBJECT_OID(&transport_list, &(*pp)->index, 0) != NULL) { free(*pp); return (SNMP_ERR_INCONS_VALUE); } /* register module */ snprintf(or_descr, sizeof(or_descr), "%s transport mapping", def->name); if (((*pp)->or_index = or_register(&def->id, or_descr, NULL)) == 0) { free(*pp); return (SNMP_ERR_GENERR); } INSERT_OBJECT_OID((*pp), &transport_list); TAILQ_INIT(&(*pp)->table); return (SNMP_ERR_NOERROR); } /* * Unregister transport */ int trans_unregister(struct transport *t) { if (!TAILQ_EMPTY(&t->table)) return (SNMP_ERR_INCONS_VALUE); or_unregister(t->or_index); TAILQ_REMOVE(&transport_list, t, link); return (SNMP_ERR_NOERROR); } /* * File descriptor support */ #ifdef USE_LIBBEGEMOT static void input(int fd, int mask __unused, void *uap) #else static void input(evContext ctx __unused, void *uap, int fd, int mask __unused) #endif { struct fdesc *f = uap; (*f->func)(fd, f->udata); } void fd_suspend(void *p) { struct fdesc *f = p; #ifdef USE_LIBBEGEMOT if (f->id >= 0) { poll_unregister(f->id); f->id = -1; } #else if (evTestID(f->id)) { (void)evDeselectFD(evctx, f->id); evInitID(&f->id); } #endif } int fd_resume(void *p) { struct fdesc *f = p; int err; #ifdef USE_LIBBEGEMOT if (f->id >= 0) return (0); if ((f->id = poll_register(f->fd, input, f, RPOLL_IN)) < 0) { err = errno; syslog(LOG_ERR, "select fd %d: %m", f->fd); errno = err; return (-1); } #else if (evTestID(f->id)) return (0); if (evSelectFD(evctx, f->fd, EV_READ, input, f, &f->id)) { err = errno; syslog(LOG_ERR, "select fd %d: %m", f->fd); errno = err; return (-1); } #endif return (0); } void * fd_select(int fd, void (*func)(int, void *), void *udata, struct lmodule *mod) { struct fdesc *f; int err; if ((f = malloc(sizeof(struct fdesc))) == NULL) { err = errno; syslog(LOG_ERR, "fd_select: %m"); errno = err; return (NULL); } f->fd = fd; f->func = func; f->udata = udata; f->owner = mod; #ifdef USE_LIBBEGEMOT f->id = -1; #else evInitID(&f->id); #endif if (fd_resume(f)) { err = errno; free(f); errno = err; return (NULL); } LIST_INSERT_HEAD(&fdesc_list, f, link); return (f); } void fd_deselect(void *p) { struct fdesc *f = p; LIST_REMOVE(f, link); fd_suspend(f); free(f); } static void fd_flush(struct lmodule *mod) { struct fdesc *t, *t1; t = LIST_FIRST(&fdesc_list); while (t != NULL) { t1 = LIST_NEXT(t, link); if (t->owner == mod) fd_deselect(t); t = t1; } } /* * Consume a message from the input buffer */ static void snmp_input_consume(struct port_input *pi) { if (!pi->stream) { /* always consume everything */ pi->length = 0; return; } if (pi->consumed >= pi->length) { /* all bytes consumed */ pi->length = 0; return; } memmove(pi->buf, pi->buf + pi->consumed, pi->length - pi->consumed); pi->length -= pi->consumed; } /* * Input from a socket */ int snmpd_input(struct port_input *pi, struct tport *tport) { u_char *sndbuf; size_t sndlen; struct snmp_pdu pdu; enum snmpd_input_err ierr, ferr; enum snmpd_proxy_err perr; ssize_t ret, slen; int32_t vi; #ifdef USE_TCPWRAPPERS char client[INET6_ADDRSTRLEN]; #endif ret = tport->transport->vtab->recv(tport, pi); if (ret == -1) return (-1); #ifdef USE_TCPWRAPPERS /* * In case of AF_INET{6} peer, do hosts_access(5) check. */ if (pi->peer->sa_family != AF_LOCAL && inet_ntop(pi->peer->sa_family, &((const struct sockaddr_in *)(const void *)pi->peer)->sin_addr, client, sizeof(client)) != NULL) { request_set(&req, RQ_CLIENT_ADDR, client, 0); if (hosts_access(&req) == 0) { syslog(LOG_ERR, "refused connection from %.500s", eval_client(&req)); return (-1); } } else if (pi->peer->sa_family != AF_LOCAL) syslog(LOG_ERR, "inet_ntop(): %m"); #endif /* * Handle input */ ierr = snmp_input_start(pi->buf, pi->length, "SNMP", &pdu, &vi, &pi->consumed); if (ierr == SNMPD_INPUT_TRUNC) { /* need more bytes. This is ok only for streaming transports. * but only if we have not reached bufsiz yet. */ if (pi->stream) { if (pi->length == buf_size(0)) { snmpd_stats.silentDrops++; return (-1); } return (0); } snmpd_stats.silentDrops++; return (-1); } /* can't check for bad SET pdus here, because a proxy may have to * check the access first. We don't want to return an error response * to a proxy PDU with a wrong community */ if (ierr == SNMPD_INPUT_FAILED) { /* for streaming transports this is fatal */ if (pi->stream) return (-1); snmp_input_consume(pi); return (0); } if (ierr == SNMPD_INPUT_BAD_COMM) { snmp_input_consume(pi); return (0); } /* * If that is a module community and the module has a proxy function, * the hand it over to the module. */ if (comm != NULL && comm->owner != NULL && comm->owner->config->proxy != NULL) { perr = (*comm->owner->config->proxy)(&pdu, tport->transport, &tport->index, pi->peer, pi->peerlen, ierr, vi, !pi->cred || pi->priv); switch (perr) { case SNMPD_PROXY_OK: snmp_input_consume(pi); return (0); case SNMPD_PROXY_REJ: break; case SNMPD_PROXY_DROP: snmp_input_consume(pi); snmp_pdu_free(&pdu); snmpd_stats.proxyDrops++; return (0); case SNMPD_PROXY_BADCOMM: snmp_input_consume(pi); snmp_pdu_free(&pdu); snmpd_stats.inBadCommunityNames++; if (snmpd.auth_traps) snmp_send_trap(&oid_authenticationFailure, (struct snmp_value *)NULL); return (0); case SNMPD_PROXY_BADCOMMUSE: snmp_input_consume(pi); snmp_pdu_free(&pdu); snmpd_stats.inBadCommunityUses++; if (snmpd.auth_traps) snmp_send_trap(&oid_authenticationFailure, (struct snmp_value *)NULL); return (0); } } /* * Check type */ if (pdu.type == SNMP_PDU_RESPONSE || pdu.type == SNMP_PDU_TRAP || pdu.type == SNMP_PDU_TRAP2) { snmpd_stats.silentDrops++; snmpd_stats.inBadPduTypes++; snmp_pdu_free(&pdu); snmp_input_consume(pi); return (0); } /* * Check community */ if (pdu.version < SNMP_V3 && ((pi->cred && !pi->priv && pdu.type == SNMP_PDU_SET) || (comm != NULL && comm->private != COMM_WRITE && (pdu.type == SNMP_PDU_SET || comm->private != COMM_READ)))) { snmpd_stats.inBadCommunityUses++; snmp_pdu_free(&pdu); snmp_input_consume(pi); if (snmpd.auth_traps) snmp_send_trap(&oid_authenticationFailure, (struct snmp_value *)NULL); return (0); } /* * Execute it. */ if ((sndbuf = buf_alloc(1)) == NULL) { snmpd_stats.silentDrops++; snmp_pdu_free(&pdu); snmp_input_consume(pi); return (0); } ferr = snmp_input_finish(&pdu, pi->buf, pi->length, sndbuf, &sndlen, "SNMP", ierr, vi, NULL); if (ferr == SNMPD_INPUT_OK) { if (tport->transport->vtab->send != NULL) slen = tport->transport->vtab->send(tport, sndbuf, sndlen, pi->peer, pi->peerlen); else slen = tport->transport->vtab->send2(tport, sndbuf, sndlen, pi); if (slen == -1) syslog(LOG_ERR, "send*: %m"); else if ((size_t)slen != sndlen) syslog(LOG_ERR, "send*: short write %zu/%zu", sndlen, (size_t)slen); } snmp_pdu_free(&pdu); free(sndbuf); snmp_input_consume(pi); return (0); } /* * Send a PDU to a given port. If this is a multi-socket port, use the * first socket. */ void snmp_send_port(void *targ, const struct asn_oid *port, struct snmp_pdu *pdu, const struct sockaddr *addr, socklen_t addrlen) { struct transport *trans = targ; struct tport *tp; u_char *sndbuf; size_t sndlen; ssize_t len; TAILQ_FOREACH(tp, &trans->table, link) if (asn_compare_oid(port, &tp->index) == 0) break; if (tp == 0) return; if ((sndbuf = buf_alloc(1)) == NULL) return; snmp_output(pdu, sndbuf, &sndlen, "SNMP PROXY"); if (trans->vtab->send != NULL) len = trans->vtab->send(tp, sndbuf, sndlen, addr, addrlen); else len = trans->vtab->send2(tp, sndbuf, sndlen, NULL); if (len == -1) syslog(LOG_ERR, "sendto: %m"); else if ((size_t)len != sndlen) syslog(LOG_ERR, "sendto: short write %zu/%zu", sndlen, (size_t)len); free(sndbuf); } /* * Close an input source * * \param pi input instance */ void snmpd_input_close(struct port_input *pi) { if (pi->id != NULL) { fd_deselect(pi->id); pi->id = NULL; } if (pi->fd >= 0) { (void)close(pi->fd); pi->fd = -1; } if (pi->buf != NULL) { free(pi->buf); pi->buf = NULL; } } /* * Initialize an input source. * * \param pi input instance */ void snmpd_input_init(struct port_input *pi) { pi->id = NULL; pi->fd = -1; pi->buf = NULL; } /* * Dump internal state. */ #ifdef USE_LIBBEGEMOT static void info_func(void) #else static void info_func(evContext ctx __unused, void *uap __unused, const void *tag __unused) #endif { struct lmodule *m; u_int i; char buf[10000]; syslog(LOG_DEBUG, "Dump of SNMPd %lu\n", (u_long)getpid()); for (i = 0; i < tree_size; i++) { switch (tree[i].type) { case SNMP_NODE_LEAF: sprintf(buf, "LEAF: %s %s", tree[i].name, asn_oid2str(&tree[i].oid)); break; case SNMP_NODE_COLUMN: sprintf(buf, "COL: %s %s", tree[i].name, asn_oid2str(&tree[i].oid)); break; } syslog(LOG_DEBUG, "%s", buf); } TAILQ_FOREACH(m, &lmodules, link) if (m->config->dump) (*m->config->dump)(); } /* * Re-read configuration */ #ifdef USE_LIBBEGEMOT static void config_func(void) #else static void config_func(evContext ctx __unused, void *uap __unused, const void *tag __unused) #endif { struct lmodule *m; if (read_config(config_file, NULL)) { syslog(LOG_ERR, "error reading config file '%s'", config_file); return; } TAILQ_FOREACH(m, &lmodules, link) if (m->config->config) (*m->config->config)(); } /* * On USR1 dump actual configuration. */ static void onusr1(int s __unused) { work |= WORK_DOINFO; } static void onhup(int s __unused) { work |= WORK_RECONFIG; } static void onterm(int s __unused) { /* allow clean-up */ exit(0); } static void init_sigs(void) { struct sigaction sa; sa.sa_handler = onusr1; sa.sa_flags = SA_RESTART; sigemptyset(&sa.sa_mask); if (sigaction(SIGUSR1, &sa, NULL)) { syslog(LOG_ERR, "sigaction: %m"); exit(1); } sa.sa_handler = onhup; if (sigaction(SIGHUP, &sa, NULL)) { syslog(LOG_ERR, "sigaction: %m"); exit(1); } sa.sa_handler = onterm; sa.sa_flags = 0; sigemptyset(&sa.sa_mask); if (sigaction(SIGTERM, &sa, NULL)) { syslog(LOG_ERR, "sigaction: %m"); exit(1); } if (sigaction(SIGINT, &sa, NULL)) { syslog(LOG_ERR, "sigaction: %m"); exit(1); } } static void block_sigs(void) { sigset_t set; sigfillset(&set); if (sigprocmask(SIG_BLOCK, &set, &blocked_sigs) == -1) { syslog(LOG_ERR, "SIG_BLOCK: %m"); exit(1); } } static void unblock_sigs(void) { if (sigprocmask(SIG_SETMASK, &blocked_sigs, NULL) == -1) { syslog(LOG_ERR, "SIG_SETMASK: %m"); exit(1); } } /* * Shut down */ static void term(void) { (void)unlink(pid_file); } static void trans_stop(void) { struct transport *t; TAILQ_FOREACH(t, &transport_list, link) (void)t->vtab->stop(1); } /* * Define a macro from the command line */ static void do_macro(char *arg) { char *eq; int err; if ((eq = strchr(arg, '=')) == NULL) err = define_macro(arg, ""); else { *eq++ = '\0'; err = define_macro(arg, eq); } if (err == -1) { syslog(LOG_ERR, "cannot save macro: %m"); exit(1); } } /* * Re-implement getsubopt from scratch, because the second argument is broken * and will not compile with WARNS=5. */ static int getsubopt1(char **arg, const char *const *options, char **valp, char **optp) { static const char *const delim = ",\t "; u_int i; char *ptr; *optp = NULL; /* skip leading junk */ for (ptr = *arg; *ptr != '\0'; ptr++) if (strchr(delim, *ptr) == NULL) break; if (*ptr == '\0') { *arg = ptr; return (-1); } *optp = ptr; /* find the end of the option */ while (*++ptr != '\0') if (strchr(delim, *ptr) != NULL || *ptr == '=') break; if (*ptr != '\0') { if (*ptr == '=') { *ptr++ = '\0'; *valp = ptr; while (*ptr != '\0' && strchr(delim, *ptr) == NULL) ptr++; if (*ptr != '\0') *ptr++ = '\0'; } else *ptr++ = '\0'; } *arg = ptr; for (i = 0; *options != NULL; options++, i++) if (strcmp(*optp, *options) == 0) return (i); return (-1); } int main(int argc, char *argv[]) { int opt; FILE *fp; int background = 1; struct tport *p; const char *prefix = "snmpd"; struct lmodule *m; char *value = NULL, *option; /* XXX */ struct transport *t; #define DBG_DUMP 0 #define DBG_EVENTS 1 #define DBG_TRACE 2 static const char *const debug_opts[] = { "dump", "events", "trace", NULL }; snmp_printf = snmp_printf_func; snmp_error = snmp_error_func; snmp_debug = snmp_debug_func; asn_error = asn_error_func; while ((opt = getopt(argc, argv, "c:dD:e:hI:l:m:p:")) != EOF) switch (opt) { case 'c': strlcpy(config_file, optarg, sizeof(config_file)); break; case 'd': background = 0; break; case 'D': while (*optarg) { switch (getsubopt1(&optarg, debug_opts, &value, &option)) { case DBG_DUMP: debug.dump_pdus = 1; break; case DBG_EVENTS: debug.evdebug++; break; case DBG_TRACE: if (value == NULL) syslog(LOG_ERR, "no value for 'trace'"); else snmp_trace = strtoul(value, NULL, 0); break; case -1: if (suboptarg) syslog(LOG_ERR, "unknown debug flag '%s'", option); else syslog(LOG_ERR, "missing debug flag"); break; } } break; case 'e': strlcpy(engine_file, optarg, sizeof(engine_file)); break; case 'h': fprintf(stderr, "%s", usgtxt); exit(0); case 'I': syspath = optarg; break; case 'l': prefix = optarg; break; case 'm': do_macro(optarg); break; case 'p': strlcpy(pid_file, optarg, sizeof(pid_file)); break; } openlog(prefix, LOG_PID | (background ? 0 : LOG_PERROR), LOG_USER); setlogmask(LOG_UPTO(debug.logpri - 1)); if (background && daemon(0, 0) < 0) { syslog(LOG_ERR, "daemon: %m"); exit(1); } argc -= optind; argv += optind; progargs = argv; nprogargs = argc; snmp_serial_no = arc4random(); #ifdef USE_TCPWRAPPERS /* * Initialize hosts_access(3) handler. */ request_init(&req, RQ_DAEMON, "snmpd", 0); sock_methods(&req); #endif /* * Initialize the tree. */ if ((tree = malloc(sizeof(struct snmp_node) * CTREE_SIZE)) == NULL) { syslog(LOG_ERR, "%m"); exit(1); } memcpy(tree, ctree, sizeof(struct snmp_node) * CTREE_SIZE); tree_size = CTREE_SIZE; /* * Get standard communities */ comm_define(COMM_READ, "SNMP read", NULL, NULL); comm_define(COMM_WRITE, "SNMP write", NULL, NULL); community = COMM_INITIALIZE; trap_reqid = reqid_allocate(512, NULL); if (config_file[0] == '\0') snprintf(config_file, sizeof(config_file), PATH_CONFIG, prefix); init_actvals(); init_snmpd_engine(); this_tick = get_ticks(); start_tick = this_tick; /* start transports */ if (atexit(trans_stop) == -1) { syslog(LOG_ERR, "atexit failed: %m"); exit(1); } if (udp_trans.start() != SNMP_ERR_NOERROR) syslog(LOG_WARNING, "cannot start UDP transport"); if (lsock_trans.start() != SNMP_ERR_NOERROR) syslog(LOG_WARNING, "cannot start LSOCK transport"); if (inet_trans.start() != SNMP_ERR_NOERROR) syslog(LOG_WARNING, "cannot start INET transport"); #ifdef USE_LIBBEGEMOT if (debug.evdebug > 0) rpoll_trace = 1; #else if (evCreate(&evctx)) { syslog(LOG_ERR, "evCreate: %m"); exit(1); } if (debug.evdebug > 0) evSetDebug(evctx, 10, stderr); #endif if (engine_file[0] == '\0') snprintf(engine_file, sizeof(engine_file), PATH_ENGINE, prefix); if (read_config(config_file, NULL)) { syslog(LOG_ERR, "error in config file"); exit(1); } TAILQ_FOREACH(t, &transport_list, link) TAILQ_FOREACH(p, &t->table, link) t->vtab->init_port(p); init_sigs(); if (pid_file[0] == '\0') snprintf(pid_file, sizeof(pid_file), PATH_PID, prefix); if ((fp = fopen(pid_file, "w")) != NULL) { fprintf(fp, "%u", getpid()); fclose(fp); if (atexit(term) == -1) { syslog(LOG_ERR, "atexit failed: %m"); (void)remove(pid_file); exit(0); } } if (or_register(&oid_snmpMIB, "The MIB module for SNMPv2 entities.", NULL) == 0) { syslog(LOG_ERR, "cannot register SNMPv2 MIB"); exit(1); } if (or_register(&oid_begemotSnmpd, "The MIB module for the Begemot SNMPd.", NULL) == 0) { syslog(LOG_ERR, "cannot register begemotSnmpd MIB"); exit(1); } while ((m = TAILQ_FIRST(&modules_start)) != NULL) { m->flags &= ~LM_ONSTARTLIST; TAILQ_REMOVE(&modules_start, m, start); lm_start(m); } snmp_send_trap(&oid_coldStart, (struct snmp_value *)NULL); for (;;) { #ifndef USE_LIBBEGEMOT evEvent event; #endif struct lmodule *mod; TAILQ_FOREACH(mod, &lmodules, link) if (mod->config->idle != NULL) (*mod->config->idle)(); #ifndef USE_LIBBEGEMOT if (evGetNext(evctx, &event, EV_WAIT) == 0) { if (evDispatch(evctx, event)) syslog(LOG_ERR, "evDispatch: %m"); } else if (errno != EINTR) { syslog(LOG_ERR, "evGetNext: %m"); exit(1); } #else poll_dispatch(1); #endif if (work != 0) { block_sigs(); if (work & WORK_DOINFO) { #ifdef USE_LIBBEGEMOT info_func(); #else if (evWaitFor(evctx, &work, info_func, NULL, NULL) == -1) { syslog(LOG_ERR, "evWaitFor: %m"); exit(1); } #endif } if (work & WORK_RECONFIG) { #ifdef USE_LIBBEGEMOT config_func(); #else if (evWaitFor(evctx, &work, config_func, NULL, NULL) == -1) { syslog(LOG_ERR, "evWaitFor: %m"); exit(1); } #endif } work = 0; unblock_sigs(); #ifndef USE_LIBBEGEMOT if (evDo(evctx, &work) == -1) { syslog(LOG_ERR, "evDo: %m"); exit(1); } #endif } } return (0); } uint64_t get_ticks(void) { struct timeval tv; uint64_t ret; if (gettimeofday(&tv, NULL)) abort(); ret = tv.tv_sec * 100ULL + tv.tv_usec / 10000ULL; return (ret); } /* * Timer support */ /* * Trampoline for the non-repeatable timers. */ #ifdef USE_LIBBEGEMOT static void tfunc(int tid __unused, void *uap) #else static void tfunc(evContext ctx __unused, void *uap, struct timespec due __unused, struct timespec inter __unused) #endif { struct timer *tp = uap; LIST_REMOVE(tp, link); tp->func(tp->udata); free(tp); } /* * Trampoline for the repeatable timers. */ #ifdef USE_LIBBEGEMOT static void trfunc(int tid __unused, void *uap) #else static void trfunc(evContext ctx __unused, void *uap, struct timespec due __unused, struct timespec inter __unused) #endif { struct timer *tp = uap; tp->func(tp->udata); } /* * Start a one-shot timer */ void * timer_start(u_int ticks, void (*func)(void *), void *udata, struct lmodule *mod) { struct timer *tp; #ifndef USE_LIBBEGEMOT struct timespec due; #endif if ((tp = malloc(sizeof(struct timer))) == NULL) { syslog(LOG_CRIT, "out of memory for timer"); exit(1); } #ifndef USE_LIBBEGEMOT due = evAddTime(evNowTime(), evConsTime(ticks / 100, (ticks % 100) * 10000)); #endif tp->udata = udata; tp->owner = mod; tp->func = func; LIST_INSERT_HEAD(&timer_list, tp, link); #ifdef USE_LIBBEGEMOT if ((tp->id = poll_start_timer(ticks * 10, 0, tfunc, tp)) < 0) { syslog(LOG_ERR, "cannot set timer: %m"); exit(1); } #else if (evSetTimer(evctx, tfunc, tp, due, evConsTime(0, 0), &tp->id) == -1) { syslog(LOG_ERR, "cannot set timer: %m"); exit(1); } #endif return (tp); } /* * Start a repeatable timer. When used with USE_LIBBEGEMOT the first argument * is currently ignored and the initial number of ticks is set to the * repeat number of ticks. */ void * timer_start_repeat(u_int ticks __unused, u_int repeat_ticks, void (*func)(void *), void *udata, struct lmodule *mod) { struct timer *tp; #ifndef USE_LIBBEGEMOT struct timespec due; struct timespec inter; #endif if ((tp = malloc(sizeof(struct timer))) == NULL) { syslog(LOG_CRIT, "out of memory for timer"); exit(1); } #ifndef USE_LIBBEGEMOT due = evAddTime(evNowTime(), evConsTime(ticks / 100, (ticks % 100) * 10000)); inter = evConsTime(repeat_ticks / 100, (repeat_ticks % 100) * 10000); #endif tp->udata = udata; tp->owner = mod; tp->func = func; LIST_INSERT_HEAD(&timer_list, tp, link); #ifdef USE_LIBBEGEMOT if ((tp->id = poll_start_timer(repeat_ticks * 10, 1, trfunc, tp)) < 0) { syslog(LOG_ERR, "cannot set timer: %m"); exit(1); } #else if (evSetTimer(evctx, trfunc, tp, due, inter, &tp->id) == -1) { syslog(LOG_ERR, "cannot set timer: %m"); exit(1); } #endif return (tp); } /* * Stop a timer. */ void timer_stop(void *p) { struct timer *tp = p; LIST_REMOVE(tp, link); #ifdef USE_LIBBEGEMOT poll_stop_timer(tp->id); #else if (evClearTimer(evctx, tp->id) == -1) { syslog(LOG_ERR, "cannot stop timer: %m"); exit(1); } #endif free(p); } static void timer_flush(struct lmodule *mod) { struct timer *t, *t1; t = LIST_FIRST(&timer_list); while (t != NULL) { t1 = LIST_NEXT(t, link); if (t->owner == mod) timer_stop(t); t = t1; } } static void snmp_printf_func(const char *fmt, ...) { va_list ap; static char *pend = NULL; char *ret, *new; va_start(ap, fmt); vasprintf(&ret, fmt, ap); va_end(ap); if (ret == NULL) return; if (pend != NULL) { if ((new = realloc(pend, strlen(pend) + strlen(ret) + 1)) == NULL) { free(ret); return; } pend = new; strcat(pend, ret); free(ret); } else pend = ret; while ((ret = strchr(pend, '\n')) != NULL) { *ret = '\0'; syslog(LOG_DEBUG, "%s", pend); if (strlen(ret + 1) == 0) { free(pend); pend = NULL; break; } strcpy(pend, ret + 1); } } static void snmp_error_func(const char *err, ...) { char errbuf[1000]; va_list ap; if (!(snmp_trace & LOG_SNMP_ERRORS)) return; va_start(ap, err); snprintf(errbuf, sizeof(errbuf), "SNMP: "); vsnprintf(errbuf + strlen(errbuf), sizeof(errbuf) - strlen(errbuf), err, ap); va_end(ap); syslog(LOG_ERR, "%s", errbuf); } static void snmp_debug_func(const char *err, ...) { char errbuf[1000]; va_list ap; va_start(ap, err); snprintf(errbuf, sizeof(errbuf), "SNMP: "); vsnprintf(errbuf+strlen(errbuf), sizeof(errbuf)-strlen(errbuf), err, ap); va_end(ap); syslog(LOG_DEBUG, "%s", errbuf); } static void asn_error_func(const struct asn_buf *b, const char *err, ...) { char errbuf[1000]; va_list ap; u_int i; if (!(snmp_trace & LOG_ASN1_ERRORS)) return; va_start(ap, err); snprintf(errbuf, sizeof(errbuf), "ASN.1: "); vsnprintf(errbuf + strlen(errbuf), sizeof(errbuf) - strlen(errbuf), err, ap); va_end(ap); if (b != NULL) { snprintf(errbuf + strlen(errbuf), sizeof(errbuf) - strlen(errbuf), " at"); for (i = 0; b->asn_len > i; i++) snprintf(errbuf + strlen(errbuf), sizeof(errbuf) - strlen(errbuf), " %02x", b->asn_cptr[i]); } syslog(LOG_ERR, "%s", errbuf); } /* * Create a new community */ struct community* comm_define_ordered(u_int priv, const char *descr, struct asn_oid *idx, struct lmodule *owner, const char *str) { struct community *c, *p; u_int ncomm; ncomm = idx->subs[idx->len - 1]; /* check that community doesn't already exist */ TAILQ_FOREACH(c, &community_list, link) if (c->value == ncomm) return (c); if ((c = malloc(sizeof(struct community))) == NULL) { syslog(LOG_ERR, "%s: %m", __func__); return (NULL); } c->owner = owner; c->value = ncomm; c->descr = descr; c->string = NULL; c->private = priv; if (str != NULL) { if((c->string = malloc(strlen(str)+1)) == NULL) { free(c); return (NULL); } strcpy(c->string, str); } /* * Insert ordered */ c->index = *idx; TAILQ_FOREACH(p, &community_list, link) { if (asn_compare_oid(&p->index, &c->index) > 0) { TAILQ_INSERT_BEFORE(p, c, link); break; } } if (p == NULL) TAILQ_INSERT_TAIL(&community_list, c, link); return (c); } u_int comm_define(u_int priv, const char *descr, struct lmodule *owner, const char *str) { struct asn_oid idx, *p; struct community *c; u_int ncomm; /* generate an identifier */ do { if ((ncomm = next_community_index++) == UINT_MAX) next_community_index = 1; TAILQ_FOREACH(c, &community_list, link) if (c->value == ncomm) break; } while (c != NULL); /* make index */ if (owner != NULL) p = &owner->index; else { p = &idx; p->len = 1; p->subs[0] = 0; } p->subs[p->len++] = ncomm; c = comm_define_ordered(priv, descr, p, owner, str); if (c == NULL) return (0); return (c->value); } const char * comm_string(u_int ncomm) { struct community *p; TAILQ_FOREACH(p, &community_list, link) if (p->value == ncomm) return (p->string); return (NULL); } /* * Delete all communities allocated by a module */ static void comm_flush(struct lmodule *mod) { struct community *p, *p1; p = TAILQ_FIRST(&community_list); while (p != NULL) { p1 = TAILQ_NEXT(p, link); if (p->owner == mod) { free(p->string); TAILQ_REMOVE(&community_list, p, link); free(p); } p = p1; } } /* * Request ID handling. * * Allocate a new range of request ids. Use a first fit algorithm. */ u_int reqid_allocate(int size, struct lmodule *mod) { u_int type; struct idrange *r, *r1; if (size <= 0 || size > INT32_MAX) { syslog(LOG_CRIT, "%s: size out of range: %d", __func__, size); return (0); } /* allocate a type id */ do { if ((type = next_idrange++) == UINT_MAX) next_idrange = 1; TAILQ_FOREACH(r, &idrange_list, link) if (r->type == type) break; } while(r != NULL); /* find a range */ if (TAILQ_EMPTY(&idrange_list)) r = NULL; else { r = TAILQ_FIRST(&idrange_list); if (r->base < size) { while((r1 = TAILQ_NEXT(r, link)) != NULL) { if (r1->base - (r->base + r->size) >= size) break; r = r1; } r = r1; } if (r == NULL) { r1 = TAILQ_LAST(&idrange_list, idrange_list); if (INT32_MAX - size + 1 < r1->base + r1->size) { syslog(LOG_ERR, "out of id ranges (%u)", size); return (0); } } } /* allocate structure */ if ((r1 = malloc(sizeof(struct idrange))) == NULL) { syslog(LOG_ERR, "%s: %m", __FUNCTION__); return (0); } r1->type = type; r1->size = size; r1->owner = mod; if (TAILQ_EMPTY(&idrange_list) || r == TAILQ_FIRST(&idrange_list)) { r1->base = 0; TAILQ_INSERT_HEAD(&idrange_list, r1, link); } else if (r == NULL) { r = TAILQ_LAST(&idrange_list, idrange_list); r1->base = r->base + r->size; TAILQ_INSERT_TAIL(&idrange_list, r1, link); } else { r = TAILQ_PREV(r, idrange_list, link); r1->base = r->base + r->size; TAILQ_INSERT_AFTER(&idrange_list, r, r1, link); } r1->next = r1->base; return (type); } int32_t reqid_next(u_int type) { struct idrange *r; int32_t id; TAILQ_FOREACH(r, &idrange_list, link) if (r->type == type) break; if (r == NULL) { syslog(LOG_CRIT, "wrong idrange type"); abort(); } if ((id = r->next++) == r->base + (r->size - 1)) r->next = r->base; return (id); } int32_t reqid_base(u_int type) { struct idrange *r; TAILQ_FOREACH(r, &idrange_list, link) if (r->type == type) return (r->base); syslog(LOG_CRIT, "wrong idrange type"); abort(); } u_int reqid_type(int32_t reqid) { struct idrange *r; TAILQ_FOREACH(r, &idrange_list, link) if (reqid >= r->base && reqid <= r->base + (r->size - 1)) return (r->type); return (0); } int reqid_istype(int32_t reqid, u_int type) { return (reqid_type(reqid) == type); } /* * Delete all communities allocated by a module */ static void reqid_flush(struct lmodule *mod) { struct idrange *p, *p1; p = TAILQ_FIRST(&idrange_list); while (p != NULL) { p1 = TAILQ_NEXT(p, link); if (p->owner == mod) { TAILQ_REMOVE(&idrange_list, p, link); free(p); } p = p1; } } /* * Merge the given tree for the given module into the main tree. */ static int compare_node(const void *v1, const void *v2) { const struct snmp_node *n1 = v1; const struct snmp_node *n2 = v2; return (asn_compare_oid(&n1->oid, &n2->oid)); } static int tree_merge(const struct snmp_node *ntree, u_int nsize, struct lmodule *mod) { struct snmp_node *xtree; u_int i; xtree = realloc(tree, sizeof(*tree) * (tree_size + nsize)); if (xtree == NULL) { syslog(LOG_ERR, "tree_merge: %m"); return (-1); } tree = xtree; memcpy(&tree[tree_size], ntree, sizeof(*tree) * nsize); for (i = 0; i < nsize; i++) tree[tree_size + i].tree_data = mod; tree_size += nsize; qsort(tree, tree_size, sizeof(tree[0]), compare_node); return (0); } /* * Remove all nodes belonging to the loadable module */ static void tree_unmerge(struct lmodule *mod) { u_int s, d; for(s = d = 0; s < tree_size; s++) if (tree[s].tree_data != mod) { if (s != d) tree[d] = tree[s]; d++; } tree_size = d; } /* * Loadable modules */ struct lmodule * lm_load(const char *path, const char *section) { struct lmodule *m; int err; int i; char *av[MAX_MOD_ARGS + 1]; int ac; u_int u; if ((m = malloc(sizeof(*m))) == NULL) { syslog(LOG_ERR, "lm_load: %m"); return (NULL); } m->handle = NULL; m->flags = 0; strlcpy(m->section, section, sizeof(m->section)); if ((m->path = strdup(path)) == NULL) { syslog(LOG_ERR, "lm_load: %m"); goto err; } /* * Make index */ m->index.subs[0] = strlen(section); m->index.len = m->index.subs[0] + 1; for (u = 0; u < m->index.subs[0]; u++) m->index.subs[u + 1] = section[u]; /* * Load the object file and locate the config structure */ if ((m->handle = dlopen(m->path, RTLD_NOW|RTLD_GLOBAL)) == NULL) { syslog(LOG_ERR, "lm_load: open %s", dlerror()); goto err; } if ((m->config = dlsym(m->handle, "config")) == NULL) { syslog(LOG_ERR, "lm_load: no 'config' symbol %s", dlerror()); goto err; } /* * Insert it into the right place */ INSERT_OBJECT_OID(m, &lmodules); /* preserve order */ if (community == COMM_INITIALIZE) { m->flags |= LM_ONSTARTLIST; TAILQ_INSERT_TAIL(&modules_start, m, start); } /* * make the argument vector. */ ac = 0; for (i = 0; i < nprogargs; i++) { if (strlen(progargs[i]) >= strlen(section) + 1 && strncmp(progargs[i], section, strlen(section)) == 0 && progargs[i][strlen(section)] == ':') { if (ac == MAX_MOD_ARGS) { syslog(LOG_WARNING, "too many arguments for " "module '%s", section); break; } av[ac++] = &progargs[i][strlen(section)+1]; } } av[ac] = NULL; /* * Run the initialization function */ if ((err = (*m->config->init)(m, ac, av)) != 0) { syslog(LOG_ERR, "lm_load: init failed: %d", err); TAILQ_REMOVE(&lmodules, m, link); goto err; } return (m); err: if ((m->flags & LM_ONSTARTLIST) != 0) TAILQ_REMOVE(&modules_start, m, start); if (m->handle) dlclose(m->handle); free(m->path); free(m); return (NULL); } /* * Start a module */ void lm_start(struct lmodule *mod) { const struct lmodule *m; /* * Merge tree. If this fails, unload the module. */ if (tree_merge(mod->config->tree, mod->config->tree_size, mod)) { lm_unload(mod); return; } /* * Read configuration */ if (read_config(config_file, mod)) { syslog(LOG_ERR, "error in config file"); lm_unload(mod); return; } if (mod->config->start) (*mod->config->start)(); mod->flags |= LM_STARTED; /* * Inform other modules */ TAILQ_FOREACH(m, &lmodules, link) if (m->config->loading) (*m->config->loading)(mod, 1); } /* * Unload a module. */ void lm_unload(struct lmodule *m) { int err; const struct lmodule *mod; TAILQ_REMOVE(&lmodules, m, link); if (m->flags & LM_ONSTARTLIST) TAILQ_REMOVE(&modules_start, m, start); tree_unmerge(m); if ((m->flags & LM_STARTED) && m->config->fini && (err = (*m->config->fini)()) != 0) syslog(LOG_WARNING, "lm_unload(%s): fini %d", m->section, err); comm_flush(m); reqid_flush(m); timer_flush(m); fd_flush(m); dlclose(m->handle); free(m->path); /* * Inform other modules */ TAILQ_FOREACH(mod, &lmodules, link) if (mod->config->loading) (*mod->config->loading)(m, 0); free(m); } /* * Register an object resource and return the index (or 0 on failures) */ u_int or_register(const struct asn_oid *or, const char *descr, struct lmodule *mod) { struct objres *objres, *or1; u_int idx; /* find a free index */ idx = 1; for (objres = TAILQ_FIRST(&objres_list); objres != NULL; objres = TAILQ_NEXT(objres, link)) { if ((or1 = TAILQ_NEXT(objres, link)) == NULL || or1->index > objres->index + 1) { idx = objres->index + 1; break; } } if ((objres = malloc(sizeof(*objres))) == NULL) return (0); objres->index = idx; objres->oid = *or; strlcpy(objres->descr, descr, sizeof(objres->descr)); objres->uptime = (uint32_t)(get_ticks() - start_tick); objres->module = mod; INSERT_OBJECT_INT(objres, &objres_list); systemg.or_last_change = objres->uptime; return (idx); } void or_unregister(u_int idx) { struct objres *objres; TAILQ_FOREACH(objres, &objres_list, link) if (objres->index == idx) { TAILQ_REMOVE(&objres_list, objres, link); free(objres); return; } } /* * RFC 3414 User-based Security Model support */ struct snmpd_usmstat * bsnmpd_get_usm_stats(void) { return (&snmpd_usmstats); } void bsnmpd_reset_usm_stats(void) { memset(&snmpd_usmstats, 0, sizeof(snmpd_usmstats)); } struct usm_user * usm_first_user(void) { return (SLIST_FIRST(&usm_userlist)); } struct usm_user * usm_next_user(struct usm_user *uuser) { if (uuser == NULL) return (NULL); return (SLIST_NEXT(uuser, up)); } struct usm_user * usm_find_user(uint8_t *engine, uint32_t elen, char *uname) { struct usm_user *uuser; SLIST_FOREACH(uuser, &usm_userlist, up) if (uuser->user_engine_len == elen && memcmp(uuser->user_engine_id, engine, elen) == 0 && strlen(uuser->suser.sec_name) == strlen(uname) && strcmp(uuser->suser.sec_name, uname) == 0) break; return (uuser); } static int usm_compare_user(struct usm_user *u1, struct usm_user *u2) { uint32_t i; if (u1->user_engine_len < u2->user_engine_len) return (-1); if (u1->user_engine_len > u2->user_engine_len) return (1); for (i = 0; i < u1->user_engine_len; i++) { if (u1->user_engine_id[i] < u2->user_engine_id[i]) return (-1); if (u1->user_engine_id[i] > u2->user_engine_id[i]) return (1); } if (strlen(u1->suser.sec_name) < strlen(u2->suser.sec_name)) return (-1); if (strlen(u1->suser.sec_name) > strlen(u2->suser.sec_name)) return (1); for (i = 0; i < strlen(u1->suser.sec_name); i++) { if (u1->suser.sec_name[i] < u2->suser.sec_name[i]) return (-1); if (u1->suser.sec_name[i] > u2->suser.sec_name[i]) return (1); } return (0); } struct usm_user * usm_new_user(uint8_t *eid, uint32_t elen, char *uname) { int cmp; struct usm_user *uuser, *temp, *prev; for (uuser = usm_first_user(); uuser != NULL; (uuser = usm_next_user(uuser))) { if (uuser->user_engine_len == elen && strlen(uname) == strlen(uuser->suser.sec_name) && strcmp(uname, uuser->suser.sec_name) == 0 && memcmp(eid, uuser->user_engine_id, elen) == 0) return (NULL); } if ((uuser = (struct usm_user *)malloc(sizeof(*uuser))) == NULL) return (NULL); memset(uuser, 0, sizeof(*uuser)); strlcpy(uuser->suser.sec_name, uname, SNMP_ADM_STR32_SIZ); memcpy(uuser->user_engine_id, eid, elen); uuser->user_engine_len = elen; if ((prev = SLIST_FIRST(&usm_userlist)) == NULL || usm_compare_user(uuser, prev) < 0) { SLIST_INSERT_HEAD(&usm_userlist, uuser, up); return (uuser); } SLIST_FOREACH(temp, &usm_userlist, up) { if ((cmp = usm_compare_user(uuser, temp)) <= 0) break; prev = temp; } if (temp == NULL || cmp < 0) SLIST_INSERT_AFTER(prev, uuser, up); else if (cmp > 0) SLIST_INSERT_AFTER(temp, uuser, up); else { syslog(LOG_ERR, "User %s exists", uuser->suser.sec_name); free(uuser); return (NULL); } return (uuser); } void usm_delete_user(struct usm_user *uuser) { SLIST_REMOVE(&usm_userlist, uuser, usm_user, up); free(uuser); } void usm_flush_users(void) { struct usm_user *uuser; while ((uuser = SLIST_FIRST(&usm_userlist)) != NULL) { SLIST_REMOVE_HEAD(&usm_userlist, up); free(uuser); } SLIST_INIT(&usm_userlist); } /* * RFC 3415 View-based Access Control Model support */ struct vacm_user * vacm_first_user(void) { return (SLIST_FIRST(&vacm_userlist)); } struct vacm_user * vacm_next_user(struct vacm_user *vuser) { if (vuser == NULL) return (NULL); return (SLIST_NEXT(vuser, vvu)); } static int vacm_compare_user(struct vacm_user *v1, struct vacm_user *v2) { uint32_t i; if (v1->sec_model < v2->sec_model) return (-1); if (v1->sec_model > v2->sec_model) return (1); if (strlen(v1->secname) < strlen(v2->secname)) return (-1); if (strlen(v1->secname) > strlen(v2->secname)) return (1); for (i = 0; i < strlen(v1->secname); i++) { if (v1->secname[i] < v2->secname[i]) return (-1); if (v1->secname[i] > v2->secname[i]) return (1); } return (0); } struct vacm_user * vacm_new_user(int32_t smodel, char *uname) { int cmp; struct vacm_user *user, *temp, *prev; SLIST_FOREACH(user, &vacm_userlist, vvu) if (strcmp(uname, user->secname) == 0 && smodel == user->sec_model) return (NULL); if ((user = (struct vacm_user *)malloc(sizeof(*user))) == NULL) return (NULL); memset(user, 0, sizeof(*user)); user->group = &vacm_default_group; SLIST_INSERT_HEAD(&vacm_default_group.group_users, user, vvg); user->sec_model = smodel; strlcpy(user->secname, uname, sizeof(user->secname)); if ((prev = SLIST_FIRST(&vacm_userlist)) == NULL || vacm_compare_user(user, prev) < 0) { SLIST_INSERT_HEAD(&vacm_userlist, user, vvu); return (user); } SLIST_FOREACH(temp, &vacm_userlist, vvu) { if ((cmp = vacm_compare_user(user, temp)) <= 0) break; prev = temp; } if (temp == NULL || cmp < 0) SLIST_INSERT_AFTER(prev, user, vvu); else if (cmp > 0) SLIST_INSERT_AFTER(temp, user, vvu); else { syslog(LOG_ERR, "User %s exists", user->secname); free(user); return (NULL); } return (user); } int vacm_delete_user(struct vacm_user *user) { if (user->group != NULL && user->group != &vacm_default_group) { SLIST_REMOVE(&user->group->group_users, user, vacm_user, vvg); if (SLIST_EMPTY(&user->group->group_users)) { SLIST_REMOVE(&vacm_grouplist, user->group, vacm_group, vge); free(user->group); } } SLIST_REMOVE(&vacm_userlist, user, vacm_user, vvu); free(user); return (0); } int vacm_user_set_group(struct vacm_user *user, u_char *octets, u_int len) { struct vacm_group *group; if (len >= SNMP_ADM_STR32_SIZ) return (-1); SLIST_FOREACH(group, &vacm_grouplist, vge) if (strlen(group->groupname) == len && memcmp(octets, group->groupname, len) == 0) break; if (group == NULL) { if ((group = (struct vacm_group *)malloc(sizeof(*group))) == NULL) return (-1); memset(group, 0, sizeof(*group)); memcpy(group->groupname, octets, len); group->groupname[len] = '\0'; SLIST_INSERT_HEAD(&vacm_grouplist, group, vge); } SLIST_REMOVE(&user->group->group_users, user, vacm_user, vvg); SLIST_INSERT_HEAD(&group->group_users, user, vvg); user->group = group; return (0); } void vacm_groups_init(void) { SLIST_INSERT_HEAD(&vacm_grouplist, &vacm_default_group, vge); } struct vacm_access * vacm_first_access_rule(void) { return (TAILQ_FIRST(&vacm_accesslist)); } struct vacm_access * vacm_next_access_rule(struct vacm_access *acl) { if (acl == NULL) return (NULL); return (TAILQ_NEXT(acl, vva)); } static int vacm_compare_access_rule(struct vacm_access *v1, struct vacm_access *v2) { uint32_t i; if (strlen(v1->group->groupname) < strlen(v2->group->groupname)) return (-1); if (strlen(v1->group->groupname) > strlen(v2->group->groupname)) return (1); for (i = 0; i < strlen(v1->group->groupname); i++) { if (v1->group->groupname[i] < v2->group->groupname[i]) return (-1); if (v1->group->groupname[i] > v2->group->groupname[i]) return (1); } if (strlen(v1->ctx_prefix) < strlen(v2->ctx_prefix)) return (-1); if (strlen(v1->ctx_prefix) > strlen(v2->ctx_prefix)) return (1); for (i = 0; i < strlen(v1->ctx_prefix); i++) { if (v1->ctx_prefix[i] < v2->ctx_prefix[i]) return (-1); if (v1->ctx_prefix[i] > v2->ctx_prefix[i]) return (1); } if (v1->sec_model < v2->sec_model) return (-1); if (v1->sec_model > v2->sec_model) return (1); if (v1->sec_level < v2->sec_level) return (-1); if (v1->sec_level > v2->sec_level) return (1); return (0); } struct vacm_access * vacm_new_access_rule(char *gname, char *cprefix, int32_t smodel, int32_t slevel) { struct vacm_group *group; struct vacm_access *acl, *temp; TAILQ_FOREACH(acl, &vacm_accesslist, vva) { if (acl->group == NULL) continue; if (strcmp(gname, acl->group->groupname) == 0 && strcmp(cprefix, acl->ctx_prefix) == 0 && acl->sec_model == smodel && acl->sec_level == slevel) return (NULL); } /* Make sure the group exists */ SLIST_FOREACH(group, &vacm_grouplist, vge) if (strcmp(gname, group->groupname) == 0) break; if (group == NULL) return (NULL); if ((acl = (struct vacm_access *)malloc(sizeof(*acl))) == NULL) return (NULL); memset(acl, 0, sizeof(*acl)); acl->group = group; strlcpy(acl->ctx_prefix, cprefix, sizeof(acl->ctx_prefix)); acl->sec_model = smodel; acl->sec_level = slevel; if ((temp = TAILQ_FIRST(&vacm_accesslist)) == NULL || vacm_compare_access_rule(acl, temp) < 0) { TAILQ_INSERT_HEAD(&vacm_accesslist, acl, vva); return (acl); } TAILQ_FOREACH(temp, &vacm_accesslist, vva) if (vacm_compare_access_rule(acl, temp) < 0) { TAILQ_INSERT_BEFORE(temp, acl, vva); return (acl); } TAILQ_INSERT_TAIL(&vacm_accesslist, acl, vva); return (acl); } int vacm_delete_access_rule(struct vacm_access *acl) { TAILQ_REMOVE(&vacm_accesslist, acl, vva); free(acl); return (0); } struct vacm_view * vacm_first_view(void) { return (SLIST_FIRST(&vacm_viewlist)); } struct vacm_view * vacm_next_view(struct vacm_view *view) { if (view == NULL) return (NULL); return (SLIST_NEXT(view, vvl)); } static int vacm_compare_view(struct vacm_view *v1, struct vacm_view *v2) { uint32_t i; if (strlen(v1->viewname) < strlen(v2->viewname)) return (-1); if (strlen(v1->viewname) > strlen(v2->viewname)) return (1); for (i = 0; i < strlen(v1->viewname); i++) { if (v1->viewname[i] < v2->viewname[i]) return (-1); if (v1->viewname[i] > v2->viewname[i]) return (1); } return (asn_compare_oid(&v1->subtree, &v2->subtree)); } struct vacm_view * vacm_new_view(char *vname, struct asn_oid *oid) { int cmp; struct vacm_view *view, *temp, *prev; SLIST_FOREACH(view, &vacm_viewlist, vvl) if (strcmp(vname, view->viewname) == 0) return (NULL); if ((view = (struct vacm_view *)malloc(sizeof(*view))) == NULL) return (NULL); memset(view, 0, sizeof(*view)); strlcpy(view->viewname, vname, sizeof(view->viewname)); asn_append_oid(&view->subtree, oid); if ((prev = SLIST_FIRST(&vacm_viewlist)) == NULL || vacm_compare_view(view, prev) < 0) { SLIST_INSERT_HEAD(&vacm_viewlist, view, vvl); return (view); } SLIST_FOREACH(temp, &vacm_viewlist, vvl) { if ((cmp = vacm_compare_view(view, temp)) <= 0) break; prev = temp; } if (temp == NULL || cmp < 0) SLIST_INSERT_AFTER(prev, view, vvl); else if (cmp > 0) SLIST_INSERT_AFTER(temp, view, vvl); else { syslog(LOG_ERR, "View %s exists", view->viewname); free(view); return (NULL); } return (view); } int vacm_delete_view(struct vacm_view *view) { SLIST_REMOVE(&vacm_viewlist, view, vacm_view, vvl); free(view); return (0); } struct vacm_context * vacm_first_context(void) { return (SLIST_FIRST(&vacm_contextlist)); } struct vacm_context * vacm_next_context(struct vacm_context *vacmctx) { if (vacmctx == NULL) return (NULL); return (SLIST_NEXT(vacmctx, vcl)); } struct vacm_context * vacm_add_context(char *ctxname, int regid) { int cmp; struct vacm_context *ctx, *temp, *prev; SLIST_FOREACH(ctx, &vacm_contextlist, vcl) if (strcmp(ctxname, ctx->ctxname) == 0) { syslog(LOG_ERR, "Context %s exists", ctx->ctxname); return (NULL); } if ((ctx = (struct vacm_context *)malloc(sizeof(*ctx))) == NULL) return (NULL); memset(ctx, 0, sizeof(*ctx)); strlcpy(ctx->ctxname, ctxname, sizeof(ctx->ctxname)); ctx->regid = regid; if ((prev = SLIST_FIRST(&vacm_contextlist)) == NULL || strlen(ctx->ctxname) < strlen(prev->ctxname) || strcmp(ctx->ctxname, prev->ctxname) < 0) { SLIST_INSERT_HEAD(&vacm_contextlist, ctx, vcl); return (ctx); } SLIST_FOREACH(temp, &vacm_contextlist, vcl) { if (strlen(ctx->ctxname) < strlen(temp->ctxname) || strcmp(ctx->ctxname, temp->ctxname) < 0) { cmp = -1; break; } prev = temp; } if (temp == NULL || cmp < 0) SLIST_INSERT_AFTER(prev, ctx, vcl); else if (cmp > 0) SLIST_INSERT_AFTER(temp, ctx, vcl); else { syslog(LOG_ERR, "Context %s exists", ctx->ctxname); free(ctx); return (NULL); } return (ctx); } void vacm_flush_contexts(int regid) { struct vacm_context *ctx, *temp; SLIST_FOREACH_SAFE(ctx, &vacm_contextlist, vcl, temp) if (ctx->regid == regid) { SLIST_REMOVE(&vacm_contextlist, ctx, vacm_context, vcl); free(ctx); } }