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// SPDX-License-Identifier: GPL-3.0-or-later
#include "plugin_freebsd.h"
#include <netinet/ip_fw.h>
#define FREE_MEM_THRESHOLD 10000 // number of unused chunks that trigger memory freeing
#define COMMON_IPFW_ERROR() collector_error("DISABLED: ipfw.packets chart"); \
collector_error("DISABLED: ipfw.bytes chart"); \
collector_error("DISABLED: ipfw.dyn_active chart"); \
collector_error("DISABLED: ipfw.dyn_expired chart"); \
collector_error("DISABLED: ipfw.mem chart");
// --------------------------------------------------------------------------------------------------------------------
// ipfw
int do_ipfw(int update_every, usec_t dt) {
(void)dt;
#if __FreeBSD__ >= 11
static int do_static = -1, do_dynamic = -1, do_mem = -1;
if (unlikely(do_static == -1)) {
do_static = config_get_boolean("plugin:freebsd:ipfw", "counters for static rules", 1);
do_dynamic = config_get_boolean("plugin:freebsd:ipfw", "number of dynamic rules", 1);
do_mem = config_get_boolean("plugin:freebsd:ipfw", "allocated memory", 1);
}
// variables for getting ipfw configuration
int error;
static int ipfw_socket = -1;
static ipfw_cfg_lheader *cfg = NULL;
ip_fw3_opheader *op3 = NULL;
static socklen_t *optlen = NULL, cfg_size = 0;
// variables for static rules handling
ipfw_obj_ctlv *ctlv = NULL;
ipfw_obj_tlv *rbase = NULL;
int rcnt = 0;
int n, seen;
struct ip_fw_rule *rule;
struct ip_fw_bcounter *cntr;
int c = 0;
char rule_num_str[12];
// variables for dynamic rules handling
caddr_t dynbase = NULL;
size_t dynsz = 0;
size_t readsz = sizeof(*cfg);;
int ttype = 0;
ipfw_obj_tlv *tlv;
ipfw_dyn_rule *dyn_rule;
uint16_t rulenum, prev_rulenum = IPFW_DEFAULT_RULE;
unsigned srn, static_rules_num = 0;
static size_t dyn_rules_num_size = 0;
static struct dyn_rule_num {
uint16_t rule_num;
uint32_t active_rules;
uint32_t expired_rules;
} *dyn_rules_num = NULL;
uint32_t *dyn_rules_counter;
if (likely(do_static | do_dynamic | do_mem)) {
// initialize the smallest ipfw_cfg_lheader possible
if (unlikely((optlen == NULL) || (cfg == NULL))) {
optlen = reallocz(optlen, sizeof(socklen_t));
*optlen = cfg_size = 32;
cfg = reallocz(cfg, *optlen);
}
// get socket descriptor and initialize ipfw_cfg_lheader structure
if (unlikely(ipfw_socket == -1))
ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
if (unlikely(ipfw_socket == -1)) {
collector_error("FREEBSD: can't get socket for ipfw configuration");
collector_error("FREEBSD: run netdata as root to get access to ipfw data");
COMMON_IPFW_ERROR();
return 1;
}
bzero(cfg, 32);
cfg->flags = IPFW_CFG_GET_STATIC | IPFW_CFG_GET_COUNTERS | IPFW_CFG_GET_STATES;
op3 = &cfg->opheader;
op3->opcode = IP_FW_XGET;
// get ifpw configuration size than get configuration
*optlen = cfg_size;
error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen);
if (error)
if (errno != ENOMEM) {
collector_error("FREEBSD: ipfw socket reading error");
COMMON_IPFW_ERROR();
return 1;
}
if ((cfg->size > cfg_size) || ((cfg_size - cfg->size) > sizeof(struct dyn_rule_num) * FREE_MEM_THRESHOLD)) {
*optlen = cfg_size = cfg->size;
cfg = reallocz(cfg, *optlen);
bzero(cfg, 32);
cfg->flags = IPFW_CFG_GET_STATIC | IPFW_CFG_GET_COUNTERS | IPFW_CFG_GET_STATES;
op3 = &cfg->opheader;
op3->opcode = IP_FW_XGET;
error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen);
if (error) {
collector_error("FREEBSD: ipfw socket reading error");
COMMON_IPFW_ERROR();
return 1;
}
}
// go through static rules configuration structures
ctlv = (ipfw_obj_ctlv *) (cfg + 1);
if (cfg->flags & IPFW_CFG_GET_STATIC) {
/* We've requested static rules */
if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) {
readsz += ctlv->head.length;
ctlv = (ipfw_obj_ctlv *) ((caddr_t) ctlv +
ctlv->head.length);
}
if (ctlv->head.type == IPFW_TLV_RULE_LIST) {
rbase = (ipfw_obj_tlv *) (ctlv + 1);
rcnt = ctlv->count;
readsz += ctlv->head.length;
ctlv = (ipfw_obj_ctlv *) ((caddr_t) ctlv + ctlv->head.length);
}
}
if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != *optlen)) {
/* We may have some dynamic states */
dynsz = *optlen - readsz;
/* Skip empty header */
if (dynsz != sizeof(ipfw_obj_ctlv))
dynbase = (caddr_t) ctlv;
else
dynsz = 0;
}
if (likely(do_mem)) {
static RRDSET *st_mem = NULL;
static RRDDIM *rd_dyn_mem = NULL;
static RRDDIM *rd_stat_mem = NULL;
if (unlikely(!st_mem)) {
st_mem = rrdset_create_localhost("ipfw",
"mem",
NULL,
"memory allocated",
NULL,
"Memory allocated by rules",
"bytes",
"freebsd.plugin",
"ipfw",
NETDATA_CHART_PRIO_IPFW_MEM,
update_every,
RRDSET_TYPE_STACKED
);
rrdset_flag_set(st_mem, RRDSET_FLAG_DETAIL);
rd_dyn_mem = rrddim_add(st_mem, "dynamic", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
rd_stat_mem = rrddim_add(st_mem, "static", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
}
rrddim_set_by_pointer(st_mem, rd_dyn_mem, dynsz);
rrddim_set_by_pointer(st_mem, rd_stat_mem, *optlen - dynsz);
rrdset_done(st_mem);
}
static RRDSET *st_packets = NULL, *st_bytes = NULL;
RRDDIM *rd_packets = NULL, *rd_bytes = NULL;
if (likely(do_static || do_dynamic)) {
if (likely(do_static)) {
if (unlikely(!st_packets)) {
st_packets = rrdset_create_localhost("ipfw",
"packets",
NULL,
"static rules",
NULL,
"Packets",
"packets/s",
"freebsd.plugin",
"ipfw",
NETDATA_CHART_PRIO_IPFW_PACKETS,
update_every,
RRDSET_TYPE_STACKED
);
}
if (unlikely(!st_bytes)) {
st_bytes = rrdset_create_localhost("ipfw",
"bytes",
NULL,
"static rules",
NULL,
"Bytes",
"bytes/s",
"freebsd.plugin",
"ipfw",
NETDATA_CHART_PRIO_IPFW_BYTES,
update_every,
RRDSET_TYPE_STACKED
);
}
}
for (n = seen = 0; n < rcnt; n++, rbase = (ipfw_obj_tlv *) ((caddr_t) rbase + rbase->length)) {
cntr = (struct ip_fw_bcounter *) (rbase + 1);
rule = (struct ip_fw_rule *) ((caddr_t) cntr + cntr->size);
if (rule->rulenum != prev_rulenum)
static_rules_num++;
if (rule->rulenum > IPFW_DEFAULT_RULE)
break;
if (likely(do_static)) {
sprintf(rule_num_str, "%"PRIu32"_%"PRIu32"", (uint32_t)rule->rulenum, (uint32_t)rule->id);
rd_packets = rrddim_find_active(st_packets, rule_num_str);
if (unlikely(!rd_packets))
rd_packets = rrddim_add(st_packets, rule_num_str, NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
rrddim_set_by_pointer(st_packets, rd_packets, cntr->pcnt);
rd_bytes = rrddim_find_active(st_bytes, rule_num_str);
if (unlikely(!rd_bytes))
rd_bytes = rrddim_add(st_bytes, rule_num_str, NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
rrddim_set_by_pointer(st_bytes, rd_bytes, cntr->bcnt);
}
c += rbase->length;
seen++;
}
if (likely(do_static)) {
rrdset_done(st_packets);
rrdset_done(st_bytes);
}
}
// go through dynamic rules configuration structures
if (likely(do_dynamic && (dynsz > 0))) {
if ((dyn_rules_num_size < sizeof(struct dyn_rule_num) * static_rules_num) ||
((dyn_rules_num_size - sizeof(struct dyn_rule_num) * static_rules_num) >
sizeof(struct dyn_rule_num) * FREE_MEM_THRESHOLD)) {
dyn_rules_num_size = sizeof(struct dyn_rule_num) * static_rules_num;
dyn_rules_num = reallocz(dyn_rules_num, dyn_rules_num_size);
}
bzero(dyn_rules_num, sizeof(struct dyn_rule_num) * static_rules_num);
dyn_rules_num->rule_num = IPFW_DEFAULT_RULE;
if (dynsz > 0 && ctlv->head.type == IPFW_TLV_DYNSTATE_LIST) {
dynbase += sizeof(*ctlv);
dynsz -= sizeof(*ctlv);
ttype = IPFW_TLV_DYN_ENT;
}
while (dynsz > 0) {
tlv = (ipfw_obj_tlv *) dynbase;
if (tlv->type != ttype)
break;
dyn_rule = (ipfw_dyn_rule *) (tlv + 1);
bcopy(&dyn_rule->rule, &rulenum, sizeof(rulenum));
for (srn = 0; srn < (static_rules_num - 1); srn++) {
if (dyn_rule->expire > 0)
dyn_rules_counter = &dyn_rules_num[srn].active_rules;
else
dyn_rules_counter = &dyn_rules_num[srn].expired_rules;
if (dyn_rules_num[srn].rule_num == rulenum) {
(*dyn_rules_counter)++;
break;
}
if (dyn_rules_num[srn].rule_num == IPFW_DEFAULT_RULE) {
dyn_rules_num[srn].rule_num = rulenum;
dyn_rules_num[srn + 1].rule_num = IPFW_DEFAULT_RULE;
(*dyn_rules_counter)++;
break;
}
}
dynsz -= tlv->length;
dynbase += tlv->length;
}
static RRDSET *st_active = NULL, *st_expired = NULL;
RRDDIM *rd_active = NULL, *rd_expired = NULL;
if (unlikely(!st_active)) {
st_active = rrdset_create_localhost("ipfw",
"active",
NULL,
"dynamic_rules",
NULL,
"Active rules",
"rules",
"freebsd.plugin",
"ipfw",
NETDATA_CHART_PRIO_IPFW_ACTIVE,
update_every,
RRDSET_TYPE_STACKED
);
}
if (unlikely(!st_expired)) {
st_expired = rrdset_create_localhost("ipfw",
"expired",
NULL,
"dynamic_rules",
NULL,
"Expired rules",
"rules",
"freebsd.plugin",
"ipfw",
NETDATA_CHART_PRIO_IPFW_EXPIRED,
update_every,
RRDSET_TYPE_STACKED
);
}
for (srn = 0; (srn < (static_rules_num - 1)) && (dyn_rules_num[srn].rule_num != IPFW_DEFAULT_RULE); srn++) {
sprintf(rule_num_str, "%d", dyn_rules_num[srn].rule_num);
rd_active = rrddim_find_active(st_active, rule_num_str);
if (unlikely(!rd_active))
rd_active = rrddim_add(st_active, rule_num_str, NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
rrddim_set_by_pointer(st_active, rd_active, dyn_rules_num[srn].active_rules);
rd_expired = rrddim_find_active(st_expired, rule_num_str);
if (unlikely(!rd_expired))
rd_expired = rrddim_add(st_expired, rule_num_str, NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
rrddim_set_by_pointer(st_expired, rd_expired, dyn_rules_num[srn].expired_rules);
}
rrdset_done(st_active);
rrdset_done(st_expired);
}
}
return 0;
#else
collector_error("FREEBSD: ipfw charts supported for FreeBSD 11.0 and newer releases only");
COMMON_IPFW_ERROR();
return 1;
#endif
}
|
