| /* |
| * (C) 2006-2011 by Pablo Neira Ayuso <pablo@netfilter.org> |
| * (C) 2011 by Vyatta Inc. <http://www.vyatta.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include "netlink.h" |
| #include "traffic_stats.h" |
| #include "cache.h" |
| #include "log.h" |
| #include "conntrackd.h" |
| #include "internal.h" |
| |
| #include <errno.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <libnetfilter_conntrack/libnetfilter_conntrack.h> |
| |
| static int init_stats(void) |
| { |
| state.stats = malloc(sizeof(struct ct_stats_state)); |
| if (!state.stats) { |
| dlog(LOG_ERR, "can't allocate memory for stats"); |
| return -1; |
| } |
| memset(state.stats, 0, sizeof(struct ct_stats_state)); |
| |
| STATE_STATS(cache) = cache_create("stats", CACHE_T_CT, |
| NO_FEATURES, NULL, |
| &cache_stats_ct_ops); |
| if (!STATE_STATS(cache)) { |
| dlog(LOG_ERR, "can't allocate memory for the " |
| "external cache"); |
| free(state.stats); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static void kill_stats(void) |
| { |
| cache_destroy(STATE_STATS(cache)); |
| } |
| |
| /* handler for requests coming via UNIX socket */ |
| static int local_handler_stats(int fd, int type, void *data) |
| { |
| int ret = LOCAL_RET_OK; |
| |
| switch(type) { |
| case CT_DUMP_INTERNAL: |
| cache_dump(STATE_STATS(cache), fd, NFCT_O_PLAIN); |
| break; |
| case CT_DUMP_INT_XML: |
| cache_dump(STATE_STATS(cache), fd, NFCT_O_XML); |
| break; |
| case CT_FLUSH_CACHE: |
| case CT_FLUSH_INT_CACHE: |
| dlog(LOG_NOTICE, "flushing caches"); |
| cache_flush(STATE_STATS(cache)); |
| break; |
| case KILL: |
| killer(0); |
| break; |
| case STATS: |
| cache_stats(STATE_STATS(cache), fd); |
| dump_traffic_stats(fd); |
| break; |
| case STATS_CACHE: |
| cache_stats_extended(STATE_STATS(cache), fd); |
| break; |
| default: |
| ret = 0; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static void stats_populate(struct nf_conntrack *ct) |
| { |
| nfct_attr_unset(ct, ATTR_ORIG_COUNTER_BYTES); |
| nfct_attr_unset(ct, ATTR_ORIG_COUNTER_PACKETS); |
| nfct_attr_unset(ct, ATTR_REPL_COUNTER_BYTES); |
| nfct_attr_unset(ct, ATTR_REPL_COUNTER_PACKETS); |
| nfct_attr_unset(ct, ATTR_TIMEOUT); |
| nfct_attr_unset(ct, ATTR_USE); |
| |
| cache_update_force(STATE_STATS(cache), ct); |
| } |
| |
| static int stats_resync(enum nf_conntrack_msg_type type, |
| struct nf_conntrack *ct, |
| void *data) |
| { |
| if (ct_filter_conntrack(ct, 1)) |
| return NFCT_CB_CONTINUE; |
| |
| /* This is required by kernels < 2.6.20 */ |
| nfct_attr_unset(ct, ATTR_TIMEOUT); |
| nfct_attr_unset(ct, ATTR_ORIG_COUNTER_BYTES); |
| nfct_attr_unset(ct, ATTR_ORIG_COUNTER_PACKETS); |
| nfct_attr_unset(ct, ATTR_REPL_COUNTER_BYTES); |
| nfct_attr_unset(ct, ATTR_REPL_COUNTER_PACKETS); |
| nfct_attr_unset(ct, ATTR_USE); |
| |
| cache_update_force(STATE_STATS(cache), ct); |
| |
| return NFCT_CB_CONTINUE; |
| } |
| |
| static int purge_step(void *data1, void *data2) |
| { |
| struct cache_object *obj = data2; |
| |
| STATE(get_retval) = 0; |
| nl_get_conntrack(STATE(get), obj->ptr); /* modifies STATE(get_retval) */ |
| if (!STATE(get_retval)) { |
| cache_del(STATE_STATS(cache), obj); |
| dlog_ct(STATE(stats_log), obj->ptr, NFCT_O_PLAIN); |
| cache_object_free(obj); |
| } |
| |
| return 0; |
| } |
| |
| static void stats_purge(void) |
| { |
| cache_iterate(STATE_STATS(cache), NULL, purge_step); |
| } |
| |
| static void stats_event_new(struct nf_conntrack *ct, int origin) |
| { |
| int id; |
| struct cache_object *obj; |
| |
| nfct_attr_unset(ct, ATTR_TIMEOUT); |
| |
| obj = cache_find(STATE_STATS(cache), ct, &id); |
| if (obj == NULL) { |
| obj = cache_object_new(STATE_STATS(cache), ct); |
| if (obj == NULL) |
| return; |
| |
| if (cache_add(STATE_STATS(cache), obj, id) == -1) { |
| cache_object_free(obj); |
| return; |
| } |
| } |
| return; |
| } |
| |
| static void stats_event_upd(struct nf_conntrack *ct, int origin) |
| { |
| nfct_attr_unset(ct, ATTR_TIMEOUT); |
| cache_update_force(STATE_STATS(cache), ct); |
| } |
| |
| static int stats_event_del(struct nf_conntrack *ct, int origin) |
| { |
| int id; |
| struct cache_object *obj; |
| |
| nfct_attr_unset(ct, ATTR_TIMEOUT); |
| |
| obj = cache_find(STATE_STATS(cache), ct, &id); |
| if (obj) { |
| cache_del(STATE_STATS(cache), obj); |
| dlog_ct(STATE(stats_log), ct, NFCT_O_PLAIN); |
| cache_object_free(obj); |
| return 1; |
| } |
| return 0; |
| } |
| |
| static struct internal_handler internal_cache_stats = { |
| .flags = INTERNAL_F_POPULATE | INTERNAL_F_RESYNC, |
| .ct = { |
| .populate = stats_populate, |
| .resync = stats_resync, |
| .purge = stats_purge, |
| .new = stats_event_new, |
| .upd = stats_event_upd, |
| .del = stats_event_del, |
| }, |
| }; |
| |
| struct ct_mode stats_mode = { |
| .init = init_stats, |
| .local = local_handler_stats, |
| .kill = kill_stats, |
| .internal = &internal_cache_stats, |
| }; |