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check_interfaces.c
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// This one is needed on FreeBSD and it has to be before the others or at least some of them
#include <getopt.h>
#include "snmp_bulkget.h"
#include "utils.h"
#include <net-snmp/net-snmp-config.h>
#include <stdbool.h>
#include <sys/time.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
/*
* text strings to output in the perfdata
*/
char *if_vars_default[] = {"inOctets", "outOctets", "inDiscards", "outDiscards",
"inErrors", "outErrors", "inUcast", "outUcast",
"speed", "inBitps", "outBitps"};
char *if_vars_cisco[] = {"inOctets", "outOctets", "inDiscards",
"outDiscards", "inCRCs", "outCollisions",
"inUcast", "outUcast", "speed",
"inBitps", "outBitps"};
/*
* OIDs, hardcoded to remove the dependency on MIBs
*/
char *oid_if_bulkget[] = {".1.3.6.1.2.1.1.3", ".1.3.6.1.2.1.2.1",
".1.3.6.1.2.1.2.2.1.2",
0}; /* "uptime", "ifNumber", "ifDescr" */
char *oid_if_get[] = {".1.3.6.1.2.1.1.3.0", ".1.3.6.1.2.1.2.1.0",
".1.3.6.1.2.1.2.2.1.2.1",
0}; /* "uptime", "ifNumber", "ifDescr" */
char *oid_if_bintec[] = {".1.3.6.1.2.1.1.3.0", ".1.3.6.1.2.1.2.1.0",
".1.3.6.1.2.1.2.2.1.2.0",
0}; /* "uptime", "ifNumber", "ifDescr" */
char *oid_extended[] = {".1.3.6.1.2.1.31.1.1.1.6", /* ifHCInOctets */
".1.3.6.1.2.1.31.1.1.1.10", /* ifHCOutOctets */
".1.3.6.1.2.1.2.2.1.11", /* ifInUcastPkts */
".1.3.6.1.2.1.2.2.1.17", /* ifOutUcastPkts */
".1.3.6.1.2.1.2.2.1.5", /* ifSpeed */
".1.3.6.1.2.1.31.1.1.1.15", /* ifHighSpeed */
".1.3.6.1.2.1.31.1.1.1.18", /* alias */
".1.3.6.1.2.1.31.1.1.1.1", /* name */
0};
char *oid_alias_bulkget[] = {".1.3.6.1.2.1.31.1.1.1.18", 0}; /* "alias" */
char *oid_alias_get[] = {".1.3.6.1.2.1.31.1.1.1.18.1", 0}; /* "alias" */
char *oid_alias_bintec[] = {".1.3.6.1.2.1.31.1.1.1.18.0", 0}; /* "alias" */
char *oid_names_bulkget[] = {".1.3.6.1.2.1.31.1.1.1.1", 0}; /* "name" */
char *oid_names_get[] = {".1.3.6.1.2.1.31.1.1.1.1.1", 0}; /* "name" */
char *oid_names_bintec[] = {".1.3.6.1.2.1.31.1.1.1.1.0",
0}; /* "name - NOT TESTED!" */
char *oid_extended_cisco[] = {
".1.3.6.1.4.1.9.5.1.4.1.1.23", /* portAdditionalOperStatus */
0};
char *oid_vals_default[] = {".1.3.6.1.2.1.2.2.1.7", /* ifAdminStatus */
".1.3.6.1.2.1.2.2.1.8", /* ifOperStatus */
".1.3.6.1.2.1.2.2.1.10", /* ifInOctets */
".1.3.6.1.2.1.2.2.1.13", /* ifInDiscards */
".1.3.6.1.2.1.2.2.1.14", /* ifInErrors */
".1.3.6.1.2.1.2.2.1.16", /* ifOutOctets */
".1.3.6.1.2.1.2.2.1.19", /* ifOutDiscards */
".1.3.6.1.2.1.2.2.1.20", /* ifOutErrors */
0};
char *oid_vals_cisco[] = {".1.3.6.1.2.1.2.2.1.7", /* ifAdminStatus */
".1.3.6.1.2.1.2.2.1.8", /* ifOperStatus */
".1.3.6.1.2.1.2.2.1.10", /* ifInOctets */
".1.3.6.1.2.1.2.2.1.13", /* ifInDiscards */
".1.3.6.1.4.1.9.2.2.1.1.12", /* locIfInCRC */
".1.3.6.1.2.1.2.2.1.16", /* ifOutOctets */
".1.3.6.1.2.1.2.2.1.19", /* ifOutDiscards */
".1.3.6.1.4.1.9.2.2.1.1.25", /* locIfCollisions */
0};
#define DEFAULT_COMMUNITY "public"
/*
* operating modes
*/
const char *modes[] = {"default", "cisco", "nonbulk", "bintec", NULL};
#ifdef DEBUG
static char *implode_result;
#endif
enum returncode {
OK = 0,
WARNING = 1,
CRITICAL = 2,
UNKNOWN = 3
};
typedef enum returncode returncode_t;
// Forward declarations
void parse_and_check_commandline(int argc, char **argv,
struct configuration_struct *config);
bool fetch_interface_aliases(struct configuration_struct* , char **, netsnmp_session *ss, netsnmp_session *session, struct ifStruct *interfaces, int ifNumber);
bool fetch_interface_names(struct configuration_struct* , char **oid_namesp, netsnmp_session *ss, netsnmp_session *session, struct ifStruct *interfaces, int ifNumber);
returncode_t print_output(struct configuration_struct *config, struct ifStruct *oldperfdata,
long double starttime, struct ifStruct *interfaces, String *out, char **if_vars,
unsigned int number_of_matched_interfaces, struct timeval *tv, int uptime,
int ifNumber);
int main(int argc, char *argv[]) {
netsnmp_session session, *ss;
netsnmp_pdu *pdu;
netsnmp_pdu *response;
netsnmp_variable_list *vars;
int status, status2;
int count = 0; /* used for: the number of interfaces we receive, the number
of regex matches */
size_t size;
/* uptime counter */
unsigned int uptime = 0;
int ifNumber = 0;
config_t config = {
.crit_on_down_flag = true,
.get_aliases_flag = false,
.match_aliases_flag = false,
.get_names_flag = false,
.print_all_flag = false,
.community = DEFAULT_COMMUNITY,
.bandwith = 0,
.oldperfdatap = 0,
.err_tolerance = 50,
.coll_tolerance = -1,
.hostname = 0,
.port = "161",
.user = 0,
.auth_proto = 0,
.auth_pass = 0,
.priv_proto = 0,
.priv_pass = 0,
.trimdescr = 0,
.prefix = 0,
.iface_regex = 0,
.global_timeout = DFLT_TIMEOUT,
.exclude_list = 0,
.speed = 0,
.lastcheck = 0,
.sleep_usecs = 0,
.session_retries = 2,
.pdu_max_repetitions = 4096L,
.mode = DEFAULT,
};
struct ifStruct *interfaces = NULL; /* current interface data */
struct ifStruct *oldperfdata = NULL; /* previous check interface data */
struct OIDStruct *OIDp;
long double starttime;
int ignore_count = 0;
char outstr[MAX_STRING];
memset(outstr, 0, sizeof(outstr));
String out;
out.max = MAX_STRING;
out.len = 0;
out.text = outstr;
struct OIDStruct lastOid;
static char **oid_ifp;
static char **oid_vals;
static char **if_vars;
static char **oid_aliasp;
static char **oid_namesp;
oid_ifp = oid_if_bulkget;
oid_vals = oid_vals_default;
if_vars = if_vars_default;
parse_and_check_commandline(argc, argv, &config);
struct timeval tv;
struct timezone tz;
gettimeofday(&tv, &tz);
starttime = (long double)tv.tv_sec + (((long double)tv.tv_usec) / 1000000);
// +1 for the `:` between hostname and port
size_t peername_max_len = strlen(config.hostname) + strlen(config.port) + 1;
char *peername = calloc(1, peername_max_len+1);
if (peername == NULL) {
printf("Failed to allocate memory at %d in %s\n", __LINE__, __FUNCTION__);
exit(3);
}
strlcpy(peername, config.hostname, peername_max_len+1);
strlcat(peername, ":", peername_max_len+1);
strlcat(peername, config.port, peername_max_len+1);
#ifdef DEBUG
benchmark_start("Start SNMP session");
#endif
if (config.user)
/* use snmpv3 */
ss = start_session_v3(&session, config.user, config.auth_proto,
config.auth_pass, config.priv_proto,
config.priv_pass, peername,
config.global_timeout, config.session_retries);
else
ss = start_session(&session, config.community, peername,
config.mode, config.global_timeout,
config.session_retries);
#ifdef DEBUG
benchmark_end();
#endif
if (config.mode == NONBULK) {
oid_ifp = oid_if_get;
size = (sizeof(oid_if_get) / sizeof(char *)) - 1;
oid_aliasp = oid_alias_get;
oid_namesp = oid_names_get;
} else if (config.mode == BINTEC) {
oid_ifp = oid_if_bintec;
size = (sizeof(oid_if_bintec) / sizeof(char *)) - 1;
oid_aliasp = oid_alias_bintec;
oid_namesp = oid_names_bintec;
} else {
oid_ifp = oid_if_bulkget;
size = (sizeof(oid_if_bulkget) / sizeof(char *)) - 1;
oid_aliasp = oid_alias_bulkget;
oid_namesp = oid_names_bulkget;
}
/* allocate the space for the interface OIDs */
OIDp = (struct OIDStruct *)calloc(size, sizeof(struct OIDStruct));
if (config.mode == CISCO) {
if_vars = if_vars_cisco;
oid_vals = oid_vals_cisco;
}
/* get the number of interfaces, and their index numbers
*
* We will attempt to get all the interfaces in a single packet
* - which should manage about 64 interfaces.
* If the end interface has not been reached, we fetch more packets - this
* is necessary to work around buggy switches that lie about the ifNumber
*/
for (bool lastifflag = false; lastifflag != true;) {
/* build our request depending on the mode */
if (count == 0)
create_pdu(config.mode, oid_ifp, &pdu, &OIDp, 2,
config.pdu_max_repetitions);
else {
/* we have not received all interfaces in the preceding packet, so
* fetch the next lot */
if (config.mode == BINTEC || config.mode == NONBULK)
pdu = snmp_pdu_create(SNMP_MSG_GETNEXT);
else {
pdu = snmp_pdu_create(SNMP_MSG_GETBULK);
pdu->non_repeaters = 0;
pdu->max_repetitions = config.pdu_max_repetitions;
}
snmp_add_null_var(pdu, lastOid.name, lastOid.name_len);
}
#ifdef DEBUG
implode_result = implode(", ", oid_ifp + count);
benchmark_start("Send SNMP request for OIDs: %s", implode_result);
#endif
/* send the request */
status = snmp_synch_response(ss, pdu, &response);
#ifdef DEBUG
benchmark_end();
free(implode_result);
#endif
if (config.sleep_usecs)
usleep(config.sleep_usecs);
if (status == STAT_SUCCESS && response->errstat == SNMP_ERR_NOERROR) {
vars = response->variables;
if (count == 0) {
/* assuming that the uptime and ifNumber come first */
/* on some devices the ifNumber is not available... */
while (!ifNumber) {
if (!(memcmp(OIDp[0].name, vars->name,
OIDp[0].name_len * sizeof(oid)))) {
/* uptime */
if (vars->type == ASN_TIMETICKS)
/* uptime is in 10ms units -> convert to seconds */
uptime = *(vars->val.integer) / 100;
} else if (!memcmp(OIDp[1].name, vars->name,
OIDp[1].name_len * sizeof(oid))) {
/* we received a valid IfNumber */
ifNumber = *(vars->val.integer);
if (ifNumber == 0) {
/* there are no interfaces! Stop here */
printf("No interfaces found");
exit(0);
}
} else {
addstr(
&out,
"(no IfNumber parameter, assuming 32 interfaces) ");
ifNumber = 32;
}
vars = vars->next_variable;
}
interfaces = (struct ifStruct *)calloc((size_t)ifNumber,
sizeof(struct ifStruct));
oldperfdata = (struct ifStruct *)calloc(
(size_t)ifNumber, sizeof(struct ifStruct));
#ifdef DEBUG
fprintf(stderr, "got %d interfaces\n", ifNumber);
#endif
} else {
/* subsequent replies have no ifNumber */
}
for (; vars; vars = vars->next_variable) {
/*
* if the next OID is shorter
* or if the next OID doesn't begin with our base OID
* then we have reached the end of the table :-)
* print_variable(vars->name, vars->name_length, vars);
*/
/* save the OID in case we need additional packets */
memcpy(lastOid.name, vars->name,
(vars->name_length * sizeof(oid)));
lastOid.name_len = vars->name_length;
if ((vars->name_length < OIDp[2].name_len) ||
(memcmp(OIDp[2].name, vars->name,
(vars->name_length - 1) * sizeof(oid)))) {
#ifdef DEBUG
fprintf(stderr, "reached end of interfaces\n");
#endif
lastifflag = true;
break;
}
/* now we fill our interfaces array with the index number and
* the description that we have received
*/
if (vars->type == ASN_OCTET_STR) {
if (config.trimdescr && config.trimdescr < vars->val_len) {
interfaces[count].index =
(int)vars->name[(vars->name_length - 1)];
MEMCPY(interfaces[count].descr,
(vars->val.string) + config.trimdescr,
vars->val_len - config.trimdescr);
TERMSTR(interfaces[count].descr,
vars->val_len - config.trimdescr);
} else {
interfaces[count].index =
(int)vars->name[(vars->name_length - 1)];
MEMCPY(interfaces[count].descr, vars->val.string,
vars->val_len);
TERMSTR(interfaces[count].descr, vars->val_len);
}
count++;
}
}
if (count < ifNumber) {
if (lastifflag) {
#ifdef DEBUG
fprintf(
stderr,
"Device says it has %d but really has %d interfaces\n",
ifNumber, count);
#endif
ifNumber = count;
} else {
#ifdef DEBUG
fprintf(stderr, "Sending another packet\n");
#endif
}
} else {
lastifflag = true;
if (count > ifNumber) {
#ifdef DEBUG
fprintf(
stderr,
"Device says it has %d but really has %d interfaces\n",
ifNumber, count);
#endif
ifNumber = count;
}
#ifdef DEBUG
fprintf(stderr, "%d interfaces found\n", ifNumber);
#endif
}
} else {
/*
* FAILURE: print what went wrong!
*/
if (status == STAT_SUCCESS)
printf("Error in packet\nReason: %s\n",
snmp_errstring(response->errstat));
else if (status == STAT_TIMEOUT) {
printf("Timeout while reading interface descriptions from %s\n",
session.peername);
exit(EXITCODE_TIMEOUT);
} else if (status == STAT_ERROR &&
ss->s_snmp_errno == SNMPERR_TIMEOUT) {
printf("Timeout\n");
exit(EXITCODE_TIMEOUT);
} else
snmp_sess_perror("snmp_bulkget", ss);
exit(2);
}
/*
* Clean up:
* free the response.
*/
if (response) {
snmp_free_pdu(response);
response = 0;
}
}
if (OIDp) {
free(OIDp);
OIDp = 0;
}
/* we should have all interface descriptions in our array */
/* If we want to match the regex with the aliases, we have to get them now.
* this allows us later to only request the interface counters of the
* desired interfaces.
*/
if (config.match_aliases_flag && config.iface_regex) {
fetch_interface_aliases(&config, oid_aliasp, ss, &session, interfaces, ifNumber);
}
/* If the get_names_flag is set, we also have to get the interface names so
* we can match the regex with them */
/* TODO: This is just a slightly changed copy from above. I think it could
* be solved better (i.e. by putting it into a function) but it works this
* way
* :-) */
if (config.get_names_flag && config.iface_regex) {
fetch_interface_names(&config, oid_namesp, ss, &session, interfaces, ifNumber);
}
if (config.iface_regex) {
/*
* a regex was given so we will go through our array
* and try and match it with what we received
*
* count is the number of matches
*/
count = 0;
for (int i = 0; i < ifNumber; i++) {
/* When --if-name is set ignore descr in favor of name, else use old
* behaviour */
if (config.get_names_flag)
status = !regexec(&config.re, interfaces[i].name, (size_t)0,
NULL, 0) ||
(config.match_aliases_flag &&
!(regexec(&config.re, interfaces[i].alias, (size_t)0,
NULL, 0)));
else
status = !regexec(&config.re, interfaces[i].descr, (size_t)0,
NULL, 0) ||
(config.match_aliases_flag &&
!(regexec(&config.re, interfaces[i].alias, (size_t)0,
NULL, 0)));
status2 = 0;
if (status && config.exclude_list) {
if (config.get_names_flag)
status2 = !regexec(&config.exclude_re, interfaces[i].name,
(size_t)0, NULL, 0) ||
(config.match_aliases_flag &&
!(regexec(&config.re, interfaces[i].alias,
(size_t)0, NULL, 0)));
else
status2 =
!regexec(&config.exclude_re, interfaces[i].descr,
(size_t)0, NULL, 0) ||
(config.match_aliases_flag &&
!(regexec(&config.exclude_re, interfaces[i].alias,
(size_t)0, NULL, 0)));
}
if (status && !status2) {
count++;
#ifdef DEBUG
fprintf(stderr, "Interface %d (%s) matched\n",
interfaces[i].index, interfaces[i].descr);
#endif
} else
interfaces[i].ignore = 1;
}
regfree(&config.re);
if (config.exclude_list)
regfree(&config.exclude_re);
if (count) {
#ifdef DEBUG
fprintf(stderr, "- %d interface%s found\n", count,
(count == 1) ? "" : "s");
#endif
} else {
printf("- no interfaces matched regex");
exit(0);
}
}
/* now retrieve the interface values in 2 GET requests
* N.B. if the interfaces are continuous we could try
* a bulk get instead
*/
for (int j = 0, k = 0; j < ifNumber; j++) {
/* add the interface to the oldperfdata list */
strcpy_nospaces(oldperfdata[j].descr, interfaces[j].descr);
if (!interfaces[j].ignore) {
/* fetch the standard values first */
if (create_request(ss, &OIDp, oid_vals, interfaces[j].index,
&response, config.sleep_usecs)) {
for (vars = response->variables; vars;
vars = vars->next_variable) {
k = -1;
/* compare the received value to the requested value */
for (int i = 0; oid_vals[i]; i++) {
if (!memcmp(OIDp[i].name, vars->name,
OIDp[i].name_len * sizeof(oid))) {
k = i;
break;
}
}
switch (k) /* the offset into oid_vals */
{
case 0: /* ifAdminStatus */
if (vars->type == ASN_INTEGER &&
*(vars->val.integer) == 2) {
/* ignore interfaces that are administratively down
*/
interfaces[j].admin_down = 1;
ignore_count++;
}
break;
case 1: /*ifOperStatus */
if (vars->type == ASN_INTEGER)
/* 1 is up(OK), 3 is testing (assume OK), 5 is
* dormant(assume OK)
*/
interfaces[j].status = (*(vars->val.integer) == 1 ||
*(vars->val.integer) == 5 ||
*(vars->val.integer) == 3)
? 1
: 0;
break;
case 2: /* ifInOctets */
if (vars->type == ASN_COUNTER)
interfaces[j].inOctets = *(vars->val.integer);
break;
case 3: /* ifInDiscards */
if (vars->type == ASN_COUNTER)
interfaces[j].inDiscards = *(vars->val.integer);
break;
case 4: /* ifInErrors or locIfInCRC */
if (vars->type == ASN_COUNTER ||
vars->type == ASN_INTEGER)
interfaces[j].inErrors = *(vars->val.integer);
break;
case 5: /* ifOutOctets */
if (vars->type == ASN_COUNTER)
interfaces[j].outOctets = *(vars->val.integer);
break;
case 6: /* ifOutDiscards */
if (vars->type == ASN_COUNTER)
interfaces[j].outDiscards = *(vars->val.integer);
break;
case 7: /* ifOutErrors or locIfCollisions */
if (vars->type == ASN_COUNTER ||
vars->type == ASN_INTEGER)
interfaces[j].outErrors = *(vars->val.integer);
break;
}
}
if (response) {
snmp_free_pdu(response);
response = 0;
}
}
/* now fetch the extended oids (64 bit counters etc.) */
if (create_request(ss, &OIDp, oid_extended, interfaces[j].index,
&response, config.sleep_usecs)) {
for (vars = response->variables; vars;
vars = vars->next_variable) {
k = -1;
/* compare the received value to the requested value */
for (int i = 0; oid_extended[i]; i++) {
if (!memcmp(OIDp[i].name, vars->name,
OIDp[i].name_len * sizeof(oid))) {
k = i;
break;
}
}
switch (k) /* the offset into oid_extended */
{
case 0: /* ifHCInOctets */
if (vars->type == ASN_COUNTER64)
interfaces[j].inOctets =
convertto64((vars->val.counter64), 0);
break;
case 1: /* ifHCOutOctets */
if (vars->type == ASN_COUNTER64)
interfaces[j].outOctets =
convertto64((vars->val.counter64), 0);
break;
case 2: /* ifInUcastPkts */
if (vars->type == ASN_COUNTER)
interfaces[j].inUcast = *(vars->val.integer);
break;
case 3: /* ifOutUcastPkts */
if (vars->type == ASN_COUNTER)
interfaces[j].outUcast = *(vars->val.integer);
break;
case 4: /* ifSpeed */
/* don't overwrite a high-speed value */
if (vars->type == ASN_GAUGE && !(interfaces[j].speed))
interfaces[j].speed = *(vars->val.integer);
break;
case 5: /* ifHighSpeed */
if (vars->type == ASN_GAUGE)
/* convert to bits / sec */
interfaces[j].speed =
((u64) * (vars->val.integer)) * 1000000ULL;
break;
case 6: /* alias */
if (vars->type == ASN_OCTET_STR)
MEMCPY(interfaces[j].alias, vars->val.string,
vars->val_len);
break;
case 7: /* name */
if (vars->type == ASN_OCTET_STR)
MEMCPY(interfaces[j].name, vars->val.string,
vars->val_len);
break;
}
}
if (response) {
snmp_free_pdu(response);
response = 0;
}
}
/* now fetch the Cisco-specific extended oids */
if (config.mode == CISCO &&
create_request(ss, &OIDp, oid_extended_cisco,
interfaces[j].index, &response,
config.sleep_usecs)) {
for (vars = response->variables; vars;
vars = vars->next_variable) {
k = -1;
/* compare the received value to the requested value */
for (int i = 0; oid_extended_cisco[i]; i++) {
if (!memcmp(OIDp[i].name, vars->name,
OIDp[i].name_len * sizeof(oid))) {
k = i;
break;
}
}
switch (k) /* the offset into oid_extended_cisco */
{
case 0: /* portAdditionalOperStatus */
if (vars->type == ASN_OCTET_STR)
interfaces[j].err_disable =
!!(vars->val.string[1] & (unsigned char)32u);
break;
}
}
if (response) {
snmp_free_pdu(response);
response = 0;
}
}
}
}
/* let the user know about interfaces that are down (and subsequently
* ignored)
*/
if (ignore_count)
addstr(&out, " - %d %s administratively down", ignore_count,
ignore_count != 1 ? "are" : "is");
if (OIDp) {
free(OIDp);
OIDp = 0;
}
/* calculate time taken, print perfdata */
gettimeofday(&tv, &tz);
returncode_t exit_code = print_output(&config, oldperfdata, starttime, interfaces, &out, if_vars, count, &tv, uptime, ifNumber);
#ifdef DEBUG
benchmark_start("Close SNMP session");
#endif
snmp_close(ss);
snmp_close(&session);
#ifdef DEBUG
benchmark_end();
#endif
SOCK_CLEANUP;
exit(exit_code);
}
returncode_t print_output(struct configuration_struct *config, struct ifStruct *oldperfdata,
long double starttime, struct ifStruct *interfaces, String *out, char **if_vars,
unsigned int number_of_matched_interfaces, struct timeval *tv, int uptime,
int ifNumber) {
unsigned int parsed_lastcheck = 0;
if (config->oldperfdatap && config->oldperfdatap[0])
parse_perfdata(config->oldperfdatap, oldperfdata, config->prefix,
&parsed_lastcheck, ifNumber, if_vars);
if (config->lastcheck)
config->lastcheck = (starttime - config->lastcheck);
else if (parsed_lastcheck)
config->lastcheck = (starttime - parsed_lastcheck);
/* do not use old perfdata if the device has been reset recently
* Note that a switch will typically rollover the uptime counter every 497
* days which is infrequent enough to not bother about :-)
* UPTIME_TOLERANCE_IN_SECS doesn't need to be a big number
*/
if ((config->lastcheck + UPTIME_TOLERANCE_IN_SECS) > uptime)
config->lastcheck = 0;
char perfstr[MAX_STRING];
memset(perfstr, 0, sizeof(perfstr));
String perf;
perf.max = MAX_STRING;
perf.len = 0;
perf.text = perfstr;
bool errorflag = false;
bool warnflag = false;
for (int i = 0; i < ifNumber; i++) {
double inload = 0, outload = 0;
if (!interfaces[i].ignore) {
int warn = 0;
char *nameOrDescr =
config->get_names_flag && strlen(interfaces[i].name)
? interfaces[i].name
: interfaces[i].descr;
if ((!interfaces[i].status || interfaces[i].err_disable) &&
!interfaces[i].ignore && !interfaces[i].admin_down) {
if (config->crit_on_down_flag) {
addstr(&perf, "[CRITICAL] ");
errorflag = true;
/* show the alias if configured */
if (config->get_names_flag && strlen(interfaces[i].name)) {
addstr(out, ", %s", interfaces[i].name);
addstr(&perf, "%s", interfaces[i].name);
} else {
addstr(out, ", %s", interfaces[i].descr);
addstr(&perf, "%s", interfaces[i].descr);
}
if (!interfaces[i].admin_down) {
if (config->get_aliases_flag &&
strlen(interfaces[i].alias)) {
addstr(out, " (%s) down", interfaces[i].alias);
addstr(&perf, " (%s) down", interfaces[i].alias);
} else {
addstr(out, " down");
addstr(&perf, " down");
}
if (interfaces[i].err_disable) {
addstr(out, " (errdisable)");
addstr(&perf, " (errdisable)");
}
}
} else {
addstr(&perf, "[OK] ");
if (config->get_names_flag && strlen(interfaces[i].name))
addstr(&perf, "%s", interfaces[i].name);
else
addstr(&perf, "%s", interfaces[i].descr);
if (config->get_aliases_flag && strlen(interfaces[i].alias))
addstr(&perf, " (%s) down", interfaces[i].alias);
else
addstr(&perf, " down");
}
} else if (interfaces[i].admin_down && config->print_all_flag) {
addstr(&perf, "[OK] %s",
(config->get_names_flag && strlen(interfaces[i].name))
? interfaces[i].name
: interfaces[i].descr);
if (config->get_aliases_flag && strlen(interfaces[i].alias))
addstr(&perf, " (%s) is down (administrative down)",
interfaces[i].alias);
else
addstr(&perf, " is down (administrative down)");
}
/* check if errors on the interface are increasing faster than our
defined value */
else if ((oldperfdata[i].inErrors || oldperfdata[i].outErrors) &&
(interfaces[i].inErrors >
(oldperfdata[i].inErrors +
(unsigned long)config->err_tolerance) ||
interfaces[i].outErrors >
(oldperfdata[i].outErrors +
(unsigned long)config->coll_tolerance))) {
if (config->oldperfdatap && !interfaces[i].ignore) {
if (config->get_names_flag && strlen(interfaces[i].name))
addstr(&perf, "[WARNING] %s", interfaces[i].name);
else
addstr(&perf, "[WARNING] %s", interfaces[i].descr);
if (config->get_aliases_flag && strlen(interfaces[i].alias))
addstr(&perf, " (%s) has", interfaces[i].alias);
else
addstr(&perf, " has");
/* if we are not in cisco mode simply use "errors" */
if (config->mode != CISCO)
addstr(&perf, " errors\n");
else {
if (interfaces[i].inErrors >
(oldperfdata[i].inErrors +
(unsigned long)config->err_tolerance))
addstr(&perf, " %lu CRC errors since last check\n",
interfaces[i].inErrors -
oldperfdata[i].inErrors);
if (interfaces[i].outErrors >
(oldperfdata[i].outErrors +
(unsigned long)config->coll_tolerance))
addstr(&perf, " %lu collisions since last check\n",
interfaces[i].outErrors -
oldperfdata[i].outErrors);
}
if (config->get_names_flag && strlen(interfaces[i].name))
addstr(out, ", %s has %lu errors", interfaces[i].name,
(interfaces[i].inErrors +
interfaces[i].outErrors -
oldperfdata[i].inErrors -
oldperfdata[i].outErrors));
else
addstr(out, ", %s has %lu errors", interfaces[i].descr,
(interfaces[i].inErrors +
interfaces[i].outErrors -
oldperfdata[i].inErrors -
oldperfdata[i].outErrors));
warnflag = true;
// warn++; /* if you uncomment this you will get 2 rows with
// [warning]
// */
}
}
if (config->lastcheck && (interfaces[i].speed || config->speed) &&
!interfaces[i].admin_down &&
(oldperfdata[i].inOctets || oldperfdata[i].outOctets)) {
interfaces[i].inbitps =
(subtract64(interfaces[i].inOctets, oldperfdata[i].inOctets,
config->lastcheck, uptime) /
(u64)config->lastcheck) *
8ULL;
interfaces[i].outbitps =
(subtract64(interfaces[i].outOctets,
oldperfdata[i].outOctets, config->lastcheck, uptime) /
(u64)config->lastcheck) *
8ULL;
if (config->speed) {
inload = (long double)interfaces[i].inbitps /
((long double)config->speed / 100L);
outload = (long double)interfaces[i].outbitps /
((long double)config->speed / 100L);
} else {
/* use the interface speed if a speed is not given */
inload = (long double)interfaces[i].inbitps /
((long double)interfaces[i].speed / 100L);
outload = (long double)interfaces[i].outbitps /
((long double)interfaces[i].speed / 100L);
}
if ((config->bandwith > 0) && ((int)inload > config->bandwith ||
(int)outload > config->bandwith)) {
warn++;
warnflag = true;
}
}
if (interfaces[i].status && !interfaces[i].ignore) {
if (!(warn))
addstr(&perf, "[OK]");
else
addstr(&perf, "[WARNING]");
addstr(&perf, " %s", nameOrDescr);
if (config->get_aliases_flag && strlen(interfaces[i].alias))
addstr(&perf, " (%s)", interfaces[i].alias);
addstr(&perf, " is up");
}
if (config->lastcheck && (interfaces[i].speed || config->speed) &&
(interfaces[i].inbitps > 0ULL ||
interfaces[i].outbitps > 0ULL) &&
!interfaces[i].admin_down) {
char *ins, *outs;
gauge_to_si(interfaces[i].inbitps, &ins);
gauge_to_si(interfaces[i].outbitps, &outs);
addstr(&perf, " %sbps(%0.2f%%)/%sbps(%0.2f%%)", ins, inload,
outs, outload);
free(ins);
free(outs);
}
if (perf.len > 0u && perf.text[(perf.len - 1u)] != '\n') {
addstr(&perf, "\n");
}
}
}
if (errorflag)
printf("CRITICAL:");
else if (warnflag)
printf("WARNING:");
else
printf("OK:");
printf(" %d interface%s found", ifNumber, (ifNumber == 1) ? "" : "s");
if (config->iface_regex)
printf(", of which %d matched the regex", number_of_matched_interfaces);
/* now print performance data */
printf("%*s | interfaces::check_multi::plugins=%d time=%.2Lf checktime=%ld",
(int)out->len, out->text, number_of_matched_interfaces,
(((long double)tv->tv_sec + ((long double)tv->tv_usec / 1000000)) -
starttime),
tv->tv_sec);
if (uptime)
printf(" %sdevice::check_snmp::uptime=%us",
config->prefix ? config->prefix : "", uptime);
for (int i = 0; i < ifNumber; i++) {
if (!interfaces[i].ignore &&
(!interfaces[i].admin_down || config->print_all_flag)) {
printf(" %s%s::check_snmp::", config->prefix ? config->prefix : "",
oldperfdata[i].descr);
printf("%s=%lluc %s=%lluc", if_vars[0], interfaces[i].inOctets,
if_vars[1], interfaces[i].outOctets);
printf(" %s=%luc %s=%luc", if_vars[2], interfaces[i].inDiscards,
if_vars[3], interfaces[i].outDiscards);
printf(" %s=%luc %s=%luc", if_vars[4], interfaces[i].inErrors,
if_vars[5], interfaces[i].outErrors);
printf(" %s=%luc %s=%luc", if_vars[6], interfaces[i].inUcast,
if_vars[7], interfaces[i].outUcast);
if (config->speed)
printf(" %s=%llu", if_vars[8], config->speed);