diff options
Diffstat (limited to 'usr.sbin/bsnmpd/modules/snmp_hostres/hostres_swinstalled_tbl.c')
| -rw-r--r-- | usr.sbin/bsnmpd/modules/snmp_hostres/hostres_swinstalled_tbl.c | 555 |
1 files changed, 0 insertions, 555 deletions
diff --git a/usr.sbin/bsnmpd/modules/snmp_hostres/hostres_swinstalled_tbl.c b/usr.sbin/bsnmpd/modules/snmp_hostres/hostres_swinstalled_tbl.c deleted file mode 100644 index 5fa5b4c..0000000 --- a/usr.sbin/bsnmpd/modules/snmp_hostres/hostres_swinstalled_tbl.c +++ /dev/null @@ -1,555 +0,0 @@ -/* - * Copyright (c) 2005-2006 The FreeBSD Project - * All rights reserved. - * - * Author: Victor Cruceru <soc-victor@freebsd.org> - * - * Redistribution of this software and documentation 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 or documentation 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 THE 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 THE 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. - * - * $FreeBSD$ - * - * Host Resources MIB implementation for SNMPd: instrumentation for - * hrSWInstalledTable - */ - -#include <sys/limits.h> -#include <sys/stat.h> -#include <sys/sysctl.h> -#include <sys/utsname.h> - -#include <assert.h> -#include <dirent.h> -#include <err.h> -#include <errno.h> -#include <stdlib.h> -#include <string.h> -#include <syslog.h> -#include <sysexits.h> - -#include "hostres_snmp.h" -#include "hostres_oid.h" -#include "hostres_tree.h" - -#define CONTENTS_FNAME "+CONTENTS" - -enum SWInstalledType { - SWI_UNKNOWN = 1, - SWI_OPERATING_SYSTEM = 2, - SWI_DEVICE_DRIVER = 3, - SWI_APPLICATION = 4 -}; - -#define SW_NAME_MLEN (64 + 1) - -/* - * This structure is used to hold a SNMP table entry - * for HOST-RESOURCES-MIB's hrSWInstalledTable - */ -struct swins_entry { - int32_t index; - u_char *name; /* max len for this is SW_NAME_MLEN */ - const struct asn_oid *id; - int32_t type; /* from enum SWInstalledType */ - u_char date[11]; - u_int date_len; - -#define HR_SWINSTALLED_FOUND 0x001 -#define HR_SWINSTALLED_IMMUTABLE 0x002 - uint32_t flags; - - TAILQ_ENTRY(swins_entry) link; -}; -TAILQ_HEAD(swins_tbl, swins_entry); - -/* - * Table to keep a conistent mapping between software and indexes. - */ -struct swins_map_entry { - int32_t index; /* swins_entry::index */ - u_char *name; /* map key,a copy of swins_entry::name*/ - - /* - * next may be NULL if the respective hrSWInstalledTblEntry - * is (temporally) gone - */ - struct swins_entry *entry; - - STAILQ_ENTRY(swins_map_entry) link; -}; -STAILQ_HEAD(swins_map, swins_map_entry); - -/* map for consistent indexing */ -static struct swins_map swins_map = STAILQ_HEAD_INITIALIZER(swins_map); - -/* the head of the list with hrSWInstalledTable's entries */ -static struct swins_tbl swins_tbl = TAILQ_HEAD_INITIALIZER(swins_tbl); - -/* next int available for indexing the hrSWInstalledTable */ -static uint32_t next_swins_index = 1; - -/* last (agent) tick when hrSWInstalledTable was updated */ -static uint64_t swins_tick; - -/* maximum number of ticks between updates of network table */ -uint32_t swins_tbl_refresh = HR_SWINS_TBL_REFRESH * 100; - -/* package directory */ -u_char *pkg_dir; - -/* last change of package list */ -static time_t os_pkg_last_change; - -/** - * Create a new entry into the hrSWInstalledTable - */ -static struct swins_entry * -swins_entry_create(const char *name) -{ - struct swins_entry *entry; - struct swins_map_entry *map; - - STAILQ_FOREACH(map, &swins_map, link) - if (strcmp((const char *)map->name, name) == 0) - break; - - if (map == NULL) { - size_t name_len; - /* new object - get a new index */ - if (next_swins_index > INT_MAX) { - syslog(LOG_ERR, "%s: hrSWInstalledTable index wrap", - __func__ ); - /* There isn't much we can do here. - * If the next_swins_index is consumed - * then we can't add entries to this table - * So it is better to exit - if the table is sparsed - * at the next agent run we can fill it fully. - */ - errx(EX_SOFTWARE, "hrSWInstalledTable index wrap"); - } - - if ((map = malloc(sizeof(*map))) == NULL) { - syslog(LOG_ERR, "%s: %m", __func__ ); - return (NULL); - } - - name_len = strlen(name) + 1; - if (name_len > SW_NAME_MLEN) - name_len = SW_NAME_MLEN; - - if ((map->name = malloc(name_len)) == NULL) { - syslog(LOG_WARNING, "%s: %m", __func__); - free(map); - return (NULL); - } - - map->index = next_swins_index++; - strlcpy((char *)map->name, name, name_len); - - STAILQ_INSERT_TAIL(&swins_map, map, link); - - HRDBG("%s added into hrSWInstalled at %d", name, map->index); - } - - if ((entry = malloc(sizeof(*entry))) == NULL) { - syslog(LOG_WARNING, "%s: %m", __func__); - return (NULL); - } - memset(entry, 0, sizeof(*entry)); - - if ((entry->name = strdup(map->name)) == NULL) { - syslog(LOG_WARNING, "%s: %m", __func__); - free(entry); - return (NULL); - } - - entry->index = map->index; - map->entry = entry; - - INSERT_OBJECT_INT(entry, &swins_tbl); - - return (entry); -} - -/** - * Delete an entry in the hrSWInstalledTable - */ -static void -swins_entry_delete(struct swins_entry *entry) -{ - struct swins_map_entry *map; - - assert(entry != NULL); - - TAILQ_REMOVE(&swins_tbl, entry, link); - - STAILQ_FOREACH(map, &swins_map, link) - if (map->entry == entry) { - map->entry = NULL; - break; - } - - free(entry->name); - free(entry); -} - -/** - * Find an entry given it's name - */ -static struct swins_entry * -swins_find_by_name(const char *name) -{ - struct swins_entry *entry; - - TAILQ_FOREACH(entry, &swins_tbl, link) - if (strcmp((const char*)entry->name, name) == 0) - return (entry); - return (NULL); -} - -/** - * Finalize this table - */ -void -fini_swins_tbl(void) -{ - struct swins_map_entry *n1; - - while ((n1 = STAILQ_FIRST(&swins_map)) != NULL) { - STAILQ_REMOVE_HEAD(&swins_map, link); - if (n1->entry != NULL) { - TAILQ_REMOVE(&swins_tbl, n1->entry, link); - free(n1->entry->name); - free(n1->entry); - } - free(n1->name); - free(n1); - } - assert(TAILQ_EMPTY(&swins_tbl)); -} - -/** - * Get the *running* O/S identification - */ -static void -swins_get_OS_ident(void) -{ - struct utsname os_id; - char os_string[SW_NAME_MLEN] = ""; - struct swins_entry *entry; - u_char *boot; - struct stat sb; - struct tm k_ts; - - if (uname(&os_id) == -1) { - syslog(LOG_WARNING, "%s: %m", __func__); - return; - } - - snprintf(os_string, sizeof(os_string), "%s: %s", - os_id.sysname, os_id.version); - - if ((entry = swins_find_by_name(os_string)) != NULL || - (entry = swins_entry_create(os_string)) == NULL) - return; - - entry->flags |= (HR_SWINSTALLED_FOUND | HR_SWINSTALLED_IMMUTABLE); - entry->id = &oid_zeroDotZero; - entry->type = (int32_t)SWI_OPERATING_SYSTEM; - memset(entry->date, 0, sizeof(entry->date)); - - if (OS_getSystemInitialLoadParameters(&boot) == SNMP_ERR_NOERROR && - strlen(boot) > 0 && stat(boot, &sb) == 0 && - localtime_r(&sb.st_ctime, &k_ts) != NULL) - entry->date_len = make_date_time(entry->date, &k_ts, 0); -} - -/** - * Read the installed packages - */ -static int -swins_get_packages(void) -{ - struct stat sb; - DIR *p_dir; - struct dirent *ent; - struct tm k_ts; - char *pkg_file; - struct swins_entry *entry; - int ret = 0; - - if (pkg_dir == NULL) - /* initialisation may have failed */ - return (-1); - - if (stat(pkg_dir, &sb) != 0) { - syslog(LOG_ERR, "hrSWInstalledTable: stat(\"%s\") failed: %m", - pkg_dir); - return (-1); - } - if (!S_ISDIR(sb.st_mode)) { - syslog(LOG_ERR, "hrSWInstalledTable: \"%s\" is not a directory", - pkg_dir); - return (-1); - } - if (sb.st_ctime <= os_pkg_last_change) { - HRDBG("no need to rescan installed packages -- " - "directory time-stamp unmodified"); - - TAILQ_FOREACH(entry, &swins_tbl, link) - entry->flags |= HR_SWINSTALLED_FOUND; - - return (0); - } - - if ((p_dir = opendir(pkg_dir)) == NULL) { - syslog(LOG_ERR, "hrSWInstalledTable: opendir(\"%s\") failed: " - "%m", pkg_dir); - return (-1); - } - - while (errno = 0, (ent = readdir(p_dir)) != NULL) { - HRDBG(" pkg file: %s", ent->d_name); - - /* check that the contents file is a regular file */ - if (asprintf(&pkg_file, "%s/%s/%s", pkg_dir, ent->d_name, - CONTENTS_FNAME) == -1) - continue; - - if (stat(pkg_file, &sb) != 0 ) { - free(pkg_file); - continue; - } - - if (!S_ISREG(sb.st_mode)) { - syslog(LOG_ERR, "hrSWInstalledTable: \"%s\" not a " - "regular file -- skipped", pkg_file); - free(pkg_file); - continue; - } - free(pkg_file); - - /* read directory timestamp on package */ - if (asprintf(&pkg_file, "%s/%s", pkg_dir, ent->d_name) == -1) - continue; - - if (stat(pkg_file, &sb) == -1 || - localtime_r(&sb.st_ctime, &k_ts) == NULL) { - free(pkg_file); - continue; - } - free(pkg_file); - - /* update or create entry */ - if ((entry = swins_find_by_name(ent->d_name)) == NULL && - (entry = swins_entry_create(ent->d_name)) == NULL) { - ret = -1; - goto PKG_LOOP_END; - } - - entry->flags |= HR_SWINSTALLED_FOUND; - entry->id = &oid_zeroDotZero; - entry->type = (int32_t)SWI_APPLICATION; - - entry->date_len = make_date_time(entry->date, &k_ts, 0); - } - - if (errno != 0) { - syslog(LOG_ERR, "hrSWInstalledTable: readdir_r(\"%s\") failed:" - " %m", pkg_dir); - ret = -1; - } else { - /* - * save the timestamp of directory - * to avoid any further scanning - */ - os_pkg_last_change = sb.st_ctime; - } - PKG_LOOP_END: - (void)closedir(p_dir); - return (ret); -} - -/** - * Refresh the installed software table. - */ -void -refresh_swins_tbl(void) -{ - int ret; - struct swins_entry *entry, *entry_tmp; - - if (this_tick - swins_tick < swins_tbl_refresh) { - HRDBG("no refresh needed"); - return; - } - - /* mark each entry as missing */ - TAILQ_FOREACH(entry, &swins_tbl, link) - entry->flags &= ~HR_SWINSTALLED_FOUND; - - ret = swins_get_packages(); - - TAILQ_FOREACH_SAFE(entry, &swins_tbl, link, entry_tmp) - if (!(entry->flags & HR_SWINSTALLED_FOUND) && - !(entry->flags & HR_SWINSTALLED_IMMUTABLE)) - swins_entry_delete(entry); - - if (ret == 0) - swins_tick = this_tick; -} - -/** - * Create and populate the package table - */ -void -init_swins_tbl(void) -{ - - if ((pkg_dir = malloc(sizeof(PATH_PKGDIR))) == NULL) - syslog(LOG_ERR, "%s: %m", __func__); - else - strcpy(pkg_dir, PATH_PKGDIR); - - swins_get_OS_ident(); - refresh_swins_tbl(); - - HRDBG("init done"); -} - -/** - * SNMP handler - */ -int -op_hrSWInstalledTable(struct snmp_context *ctx __unused, - struct snmp_value *value, u_int sub, u_int iidx __unused, - enum snmp_op curr_op) -{ - struct swins_entry *entry; - - refresh_swins_tbl(); - - switch (curr_op) { - - case SNMP_OP_GETNEXT: - if ((entry = NEXT_OBJECT_INT(&swins_tbl, - &value->var, sub)) == NULL) - return (SNMP_ERR_NOSUCHNAME); - value->var.len = sub + 1; - value->var.subs[sub] = entry->index; - goto get; - - case SNMP_OP_GET: - if ((entry = FIND_OBJECT_INT(&swins_tbl, - &value->var, sub)) == NULL) - return (SNMP_ERR_NOSUCHNAME); - goto get; - - case SNMP_OP_SET: - if ((entry = FIND_OBJECT_INT(&swins_tbl, - &value->var, sub)) == NULL) - return (SNMP_ERR_NO_CREATION); - return (SNMP_ERR_NOT_WRITEABLE); - - case SNMP_OP_ROLLBACK: - case SNMP_OP_COMMIT: - abort(); - } - abort(); - - get: - switch (value->var.subs[sub - 1]) { - - case LEAF_hrSWInstalledIndex: - value->v.integer = entry->index; - return (SNMP_ERR_NOERROR); - - case LEAF_hrSWInstalledName: - return (string_get(value, entry->name, -1)); - break; - - case LEAF_hrSWInstalledID: - assert(entry->id != NULL); - value->v.oid = *entry->id; - return (SNMP_ERR_NOERROR); - - case LEAF_hrSWInstalledType: - value->v.integer = entry->type; - return (SNMP_ERR_NOERROR); - - case LEAF_hrSWInstalledDate: - return (string_get(value, entry->date, entry->date_len)); - } - abort(); -} - -/** - * Scalars - */ -int -op_hrSWInstalled(struct snmp_context *ctx __unused, - struct snmp_value *value __unused, u_int sub, - u_int iidx __unused, enum snmp_op curr_op) -{ - - /* only SNMP GET is possible */ - switch (curr_op) { - - case SNMP_OP_GET: - goto get; - - case SNMP_OP_SET: - return (SNMP_ERR_NOT_WRITEABLE); - - case SNMP_OP_ROLLBACK: - case SNMP_OP_COMMIT: - case SNMP_OP_GETNEXT: - abort(); - } - abort(); - - get: - switch (value->var.subs[sub - 1]) { - - case LEAF_hrSWInstalledLastChange: - case LEAF_hrSWInstalledLastUpdateTime: - /* - * We always update the entire table so these two tick - * values should be equal. - */ - refresh_swins_tbl(); - if (swins_tick <= start_tick) - value->v.uint32 = 0; - else { - uint64_t lastChange = swins_tick - start_tick; - - /* may overflow the SNMP type */ - value->v.uint32 = - (lastChange > UINT_MAX ? UINT_MAX : lastChange); - } - - return (SNMP_ERR_NOERROR); - - default: - abort(); - } -} |
