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util.c
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/*
Copyright (C) 2016 Eneo Tecnologia S.L.
Author: Eugenio Perez <[email protected]>
Based on Luca Deri nprobe 6.22 collector
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "f2k.h"
#include "rb_sensor.h"
#include "template.h"
#include <assert.h>
#include <dirent.h>
#include <arpa/inet.h>
#include <stdarg.h>
#include <pwd.h>
#include <syslog.h>
#include <sys/stat.h>
#ifdef FREEBSD
#include <pthread_np.h>
typedef cpuset_t cpu_set_t;
#endif
#ifdef __NetBSD__
#include <pthread.h>
#include <sched.h>
#endif
#ifdef sun
extern char *strtok_r(char *, const char *, char **);
#endif
#ifdef HAVE_GEOIP
#define GEOIP_DIR_LOCAL_TEMPLATE "%s"
#define GEOIP_DIR_SYSTEM_TEMPLATE PREFIX "/f2k/%s"
#endif
/* ************************************ */
void traceEvent(const int eventTraceLevel, const char* file,
const int line, const char * format, ...) {
va_list va_ap;
if(eventTraceLevel <= readOnlyGlobals.traceLevel) {
char buf[4096], out_buf[4096-(1024-640)];
char theDate[32], *extra_msg = "";
time_t theTime = time(NULL);
va_start (va_ap, format);
/* We have two paths - one if we're logging, one if we aren't
* Note that the no-log case is those systems which don't support it (WIN32),
* those without the headers !defined(USE_SYSLOG)
* those where it's parametrically off...
*/
memset(buf, 0, sizeof(buf));
strftime(theDate, 32, "%d/%b/%Y %H:%M:%S", localtime(&theTime));
vsnprintf(buf, sizeof(buf)-1, format, va_ap);
if(eventTraceLevel == 0 /* TRACE_ERROR */)
extra_msg = "ERROR: ";
else if(eventTraceLevel == 1 /* TRACE_WARNING */)
extra_msg = "WARNING: ";
while(buf[strlen(buf)-1] == '\n') buf[strlen(buf)-1] = '\0';
snprintf(out_buf, sizeof(out_buf)-1, "%s [%s:%d] %s%s", theDate,
file,
line, extra_msg, buf);
if(readOnlyGlobals.useSyslog) {
if(!readWriteGlobals->syslog_opened) {
openlog(readOnlyGlobals.f2kId, LOG_PID, LOG_DAEMON);
readWriteGlobals->syslog_opened = 1;
}
syslog(LOG_INFO, "%s", out_buf);
} else
printf("%s\n", out_buf);
}
fflush(stdout);
va_end(va_ap);
}
/* ********* IP utils ****** */
/*
* A faster replacement for inet_ntoa().
*/
char* _intoaV4(unsigned int addr, char* buf, size_t bufLen) {
char *cp, *retStr;
uint byte;
int n;
cp = &buf[bufLen];
*--cp = '\0';
for (n = 4; n > 0; --n) {
byte = addr & 0xff;
*--cp = byte % 10 + '0';
byte /= 10;
if (byte > 0) {
*--cp = byte % 10 + '0';
byte /= 10;
if (byte > 0) {
*--cp = byte + '0';
}
}
*--cp = '.';
addr >>= 8;
}
/* Convert the string to lowercase */
retStr = (char*)(cp+1);
return(retStr);
}
/* ****************************** */
const char* _intoa(IpAddress addr, char* buf, size_t bufLen) {
if((addr.ipVersion == 4) || (addr.ipVersion == 0 /* Misconfigured */)){
return(_intoaV4(addr.ipType.ipv4, buf, bufLen));
} else {
const char *ret;
ret = inet_ntop(AF_INET6, &addr.ipType.ipv6, buf, bufLen);
if(ret == NULL) {
traceEvent(TRACE_WARNING, "Internal error (buffer too short)");
buf[0] = '\0';
}
ret = buf;
return(ret);
}
}
#ifdef HAVE_GEOIP
static void readGeoIpDatabase(const char *path, const char *database_name, GeoIP ** geo_v4,GeoIP **geo_v6)
{
assert(geo_v4);
assert(geo_v6);
if(path == NULL)
return;
pthread_rwlock_wrlock(&readWriteGlobals->geoipRwLock);
if(*geo_v4){
traceEvent(TRACE_NORMAL,"Closing %s database",database_name);
*geo_v4 = NULL;
GeoIP_delete(*geo_v4);
}
if(*geo_v6){
traceEvent(TRACE_NORMAL,"Closing %s IPV6 database",database_name);
*geo_v6 = NULL;
GeoIP_delete(*geo_v6);
}
struct stat stats;
char the_path[256];
if(stat(path, &stats) == 0)
snprintf(the_path, sizeof(the_path), GEOIP_DIR_LOCAL_TEMPLATE, path);
else
snprintf(the_path, sizeof(the_path), GEOIP_DIR_SYSTEM_TEMPLATE, path);
if((*geo_v4 = GeoIP_open(the_path, GEOIP_MEMORY_CACHE)) != NULL) {
traceEvent(TRACE_NORMAL, "GeoIP: loaded %s config file %s", database_name,the_path);
(*geo_v4)->charset = GEOIP_CHARSET_UTF8;
}else{
traceEvent(TRACE_WARNING, "Unable to load %s file %s. %s support disabled", database_name,the_path,database_name);
}
/* ********************************************* */
strcpy(&the_path[strlen(the_path)-4], "v6.dat");
if((*geo_v6 = GeoIP_open(the_path, GEOIP_MEMORY_CACHE)) != NULL) {
traceEvent(TRACE_NORMAL, "GeoIP: loaded %s IPv6 config file %s", database_name,the_path);
(*geo_v6)->charset = GEOIP_CHARSET_UTF8;
}else{
traceEvent(TRACE_WARNING, "Unable to load %s IPv6 file %s. AS IPv6 support disabled", database_name,the_path);
}
pthread_rwlock_unlock(&readWriteGlobals->geoipRwLock);
}
void readASs(const char *path) {
readGeoIpDatabase(path,"AS",&readOnlyGlobals.geo_ip_asn_db,&readOnlyGlobals.geo_ip_asn_db_v6);
}
void deleteGeoIPDatabases()
{
pthread_rwlock_wrlock(&readWriteGlobals->geoipRwLock);
if(readOnlyGlobals.geo_ip_asn_db != NULL)
GeoIP_delete(readOnlyGlobals.geo_ip_asn_db);
readOnlyGlobals.geo_ip_asn_db = NULL;
if(readOnlyGlobals.geo_ip_asn_db_v6 != NULL)
GeoIP_delete(readOnlyGlobals.geo_ip_asn_db_v6);
readOnlyGlobals.geo_ip_asn_db_v6 = NULL;
if(readOnlyGlobals.geo_ip_country_db != NULL)
GeoIP_delete(readOnlyGlobals.geo_ip_country_db);
readOnlyGlobals.geo_ip_country_db = NULL;
if(readOnlyGlobals.geo_ip_country_db_v6 != NULL)
GeoIP_delete(readOnlyGlobals.geo_ip_country_db_v6);
readOnlyGlobals.geo_ip_country_db_v6 = NULL;
pthread_rwlock_unlock(&readWriteGlobals->geoipRwLock);
}
#endif
/* ******************************************** */
#ifdef HAVE_GEOIP
void readCountries(const char *path) {
readGeoIpDatabase(path,"cities",&readOnlyGlobals.geo_ip_country_db,&readOnlyGlobals.geo_ip_country_db_v6);
}
#endif
/* ******************************************** */
uint64_t net2number(const void *vbuffer, const uint16_t real_field_len) {
const uint8_t *buffer = vbuffer;
switch(real_field_len){
case 1:
return *buffer;
case 2:
return ntohs(*(const uint16_t *)buffer);
case 4:
return ntohl(*(const uint32_t *)buffer);
case 6: /* MAC address case */
return (uint64_t)ntohs(*(const uint16_t *)buffer)<<32 | ntohl(*(const uint32_t *)(buffer+2));
case 8:
return ntohll(*(const uint64_t *)buffer);
default:
if (unlikely(readOnlyGlobals.enable_debug)) {
traceEvent(TRACE_WARNING,"Cannot transform number of size %d:",real_field_len);
}
return 0;
};
}
/* ******************************************** */
struct AS_info
{
const char *number;
size_t number_len;
const char *name;
};
#if 0
static size_t print_twitter_user(struct printbuf *kafka_line_buffer,const char *url)
{
assert(kafka_line_buffer);
const char *status = url ? strstr(url,"/status") : NULL;
if(status)
{
#define TWITTER_URL "https://twitter.com/"
const size_t user_len = status-url;
//printf("Numbers of chars: %d\n",user_len);
printbuf_memappend_fast(kafka_line_buffer,TWITTER_URL,strlen(TWITTER_URL));
printbuf_memappend_fast(kafka_line_buffer,url+1,user_len-1);
return user_len + strlen(TWITTER_URL);
}
return 0;
}
#endif
#ifdef TEST_PRINT_TWITTER_USER
void test_print_twitter_user()
{
struct printbuf *kafka_line_buffer = printbuf_new();
const char *url1 = "/useruser/stat/foobar";
const size_t test1 = print_twitter_user(kafka_line_buffer,url1);
assert(test1==0);
assert(NULL==strstr(kafka_line_buffer->buf,"useruser"));
const char *url2 = "/useruser/status/foobar";
print_twitter_user(kafka_line_buffer,url2);
if(0!=strcmp(kafka_line_buffer->buf,TWITTER_URL "useruser"))
{
fprintf("Expected: %s, actual: %s",TWITTER_URL "useruser", kafka_line_buffer->buf);
assert("fail"==NULL);
}
}
#endif
/* Check that nchar characters of str starts with 10xxxxxx, assuming that str is str_len len. */
static int check_multibyte_characters(const char *str,
const size_t str_len,const size_t nchar) {
size_t i;
if(str_len < nchar) {
/* Not enough spaces */
return 0;
}
for(i=0; i<str_len && i<nchar; ++i) {
if((str[i] & 0xc0) != 0x80) {
return 0;
}
}
return 1;
}
/* Return if the next char is a valid UTF-8 char, and it's length.
i.e, it returns:
1 - Valid 1-byte char
2 - Valid 2-byte char
3 - Valid 3-byte char
4 - Valid 4-byte char
-1 - Invalid char
Params:
to_end -> size of the string from cursor, in bytes
*/
static int valid_utf8_char(const char *cursor,size_t to_end) {
/* We could do it with a for loop, but there is only this cases */
unsigned char b = cursor[0];
if((b & 0x80) == 0) {
/* ASCII code, we can accept it */
return 1;
} else if (b == 0xc0 || b == 0xc1) {
/* Trying to code ASCII character too long. */
return -1;
} else if ((b & 0xe0) == 0xc0) {
/* 2-bytes symbol, if second character is ok */
if (check_multibyte_characters(cursor + 1,to_end-1,1)) {
return 2;
} else {
return -1;
}
} else if ((b & 0xf0) == 0xe0) {
/* 3 bytes symbol, if 2nd and 3rd characters are ok */
if (check_multibyte_characters(cursor+1,to_end-1,2)) {
return 3;
} else {
return -1;
}
} else if ((b & 0xf8) == 0xf0) {
/* 4 bytes symbol, if 2nd, 3rd and 4th characters are ok */
if (check_multibyte_characters(cursor+1,to_end-1,3)) {
return 4;
} else {
return -1;
}
} else {
/* Invalid character, just escape */
return -1;
}
}
size_t append_escaped(struct printbuf *buffer,const char *string,size_t string_len)
{
assert(buffer);
assert(string);
static const char *percent = "%";
static const char *to_escape_chars = "\"\\/\b\f\n\r\t";
static const char *escaped_chars = "\"\\/bfnrt";
const size_t start_bpos = buffer->bpos;
unsigned i=0;
while(i<string_len)
{
char *escaped = NULL;
/* Check against UTF-8 validation */
const int utf8_length = valid_utf8_char(string + i,string_len - i);
if(utf8_length < 0) {
/* Invalid character, better print percent notation */
printbuf_memappend_fast(buffer,percent,strlen(percent));
printbuf_memappend_fast_n16(buffer,string[i]);
++i;
} else if (utf8_length == 1 &&
(escaped = memchr(to_escape_chars,string[i],strlen(to_escape_chars)))) {
/* Need to escape JSON character */
const size_t escaped_offset = escaped - to_escape_chars;
printbuf_memappend_fast(buffer,"\\",1);
printbuf_memappend_fast(buffer,&escaped_chars[escaped_offset],1);
++i;
} else {
/* Normal character, we are safe */
printbuf_memappend_fast(buffer,&string[i],(size_t)utf8_length);
i += utf8_length;
}
}
return buffer->bpos - start_bpos;
}
/* ****************************************************** */
/* Same as msTimeDiff with float */
float timevalDiff(struct timeval *end, struct timeval *begin) {
if((end->tv_sec == 0) && (end->tv_usec == 0))
return(0);
else {
float f = (end->tv_sec-begin->tv_sec)*1000+((float)(end->tv_usec-begin->tv_usec))/(float)1000;
return((f < 0) ? 0 : f);
}
}
/* ****************************************************** */
uint32_t msTimeDiff(struct timeval *end, struct timeval *begin) {
return((uint32_t)timevalDiff(end, begin));
}
/* ******************************************* */
unsigned int ntop_sleep(unsigned int secs) {
unsigned int unsleptTime = secs, rest;
sigset_t newsigset, oldset;
sigfillset(&newsigset);
pthread_sigmask(SIG_BLOCK, &newsigset, &oldset);
// traceEvent(TRACE_NORMAL, "%s(%d)", __FUNCTION__, secs);
while((rest = sleep(unsleptTime)) > 0)
unsleptTime = rest;
pthread_sigmask(SIG_SETMASK, &oldset, NULL);
return(secs);
}
/* ******************************************* */
static void detachFromTerminal(int doChdir) {
if(doChdir) {
int rc = chdir("/");
if(rc != 0) traceEvent(TRACE_ERROR, "Error while moving to / directory");
}
setsid(); /* detach from the terminal */
fclose(stdin);
fclose(stdout);
/* fclose(stderr); */
/*
* clear any inherited file mode creation mask
*/
umask (0);
/*
* Use line buffered stdout
*/
/* setlinebuf (stdout); */
setvbuf(stdout, (char *)NULL, _IOLBF, 0);
}
/* **************************************** */
void daemonize(void) {
int childpid;
signal(SIGHUP, SIG_IGN);
signal(SIGCHLD, SIG_IGN);
signal(SIGQUIT, SIG_IGN);
if((childpid = fork()) < 0)
traceEvent(TRACE_ERROR, "INIT: Occurred while daemonizing (errno=%d)", errno);
else {
#ifdef DEBUG
traceEvent(TRACE_INFO, "DEBUG: after fork() in %s (%d)",
childpid ? "parent" : "child", childpid);
#endif
if(!childpid) { /* child */
traceEvent(TRACE_INFO, "INIT: Bye bye: I'm becoming a daemon...");
detachFromTerminal(1);
} else { /* father */
traceEvent(TRACE_INFO, "INIT: Parent process is exiting (this is normal)");
exit(0);
}
}
}
/* ****************************************
Address management
**************************************** */
/** Simulates << over network order uint64_t
* @param bits Bits to apply ltlt
* @Note Need to use this because of ntohll(htonll(*bits)) shadows a local
* variable declared in both in gcc 4.4.7
*/
static void operator_ltlt_beuint64(uint64_t *bits) {
const uint64_t bits_h = ntohll(*bits);
*bits = htonll(bits_h<<1);
}
// Simulates << over ipv6 addr
static void operator_ltlt_ipv6(uint8_t bits[16]) {
uint64_t *_bits=(uint64_t *)bits;
operator_ltlt_beuint64(_bits[1] == 0 ? &_bits[0] : &_bits[1]);
}
static int int2bits(uint8_t bits[16],int number) {
int i;
int _bits = number;
// @TODO memset(bits,0xFF,sizeof(bits));
for(i=0;i<16;++i)
bits[i]=0xff;
if((number > 128) || (number < 0))
return(CONST_INVALIDNETMASK);
else {
while (number < 128){
operator_ltlt_ipv6(bits);
number++;
}
}
return _bits;
}
/* ********************** */
static int dotted2bits(uint8_t bits[16], const char *mask, int ipv4) {
int num;
int fields_num = sscanf(mask, "%d",&num);
if(fields_num == 1)
{
#ifdef DEBUG
traceEvent(CONST_TRACE_INFO, "DEBUG: dotted2bits (%s) = %d", mask, fields[0]);
#endif
return int2bits (bits,ipv4 ? num + 128-32 : num);
}
return CONST_INVALIDNETMASK;
}
/* ********************** */
bool parseAddress(const char *address, netAddress_t *netaddress) {
int ipv6_pton_rc, ipv4_pton_rc=0;
union {
struct in6_addr in6;
struct in_addr in4;
} buf;
char str[INET6_ADDRSTRLEN];
int bits = CONST_INVALIDNETMASK;
char *mask = strchr(address, '/');
if(mask == NULL){
int2bits(netaddress->networkMask, 128);
bits = 128;
}
else {
mask[0] = '\0';
mask++;
}
// Try to parse as ipv6
ipv6_pton_rc = inet_pton(AF_INET6, address, &buf.in6);
if(ipv6_pton_rc != 1){
ipv4_pton_rc = inet_pton(AF_INET, address, &buf.in4);
if(ipv4_pton_rc != 1) {
traceEvent(TRACE_ERROR,"Can't parse IP %s",address);
}
}
if(mask) {
bits = dotted2bits (netaddress->networkMask, mask, ipv4_pton_rc);
}
if(bits == CONST_INVALIDNETMASK) {
traceEvent(TRACE_ERROR,"Can't parse IP %s",address);
return false;
}
if(ipv6_pton_rc == 1) {
memcpy(netaddress->network,buf.in6.s6_addr,
sizeof(netaddress->network));
} else if(ipv4_pton_rc == 1) {
netaddress->network[0] = 0;
netaddress->network[1] = 0;
netaddress->network[2] = 0;
netaddress->network[3] = 0;
netaddress->network[4] = 0;
netaddress->network[5] = 0;
netaddress->network[6] = 0;
netaddress->network[7] = 0;
netaddress->network[8] = 0;
netaddress->network[9] = 0;
netaddress->network[10] = 0xFF;
netaddress->network[11] = 0xFF;
netaddress->network[12] = ((buf.in4.s_addr & 0x000000FF));
netaddress->network[13] = ((buf.in4.s_addr & 0x0000FF00) >> 8);
netaddress->network[14] = ((buf.in4.s_addr & 0x00FF0000) >> 16);
netaddress->network[15] = ((buf.in4.s_addr & 0xFF000000) >> 24);
}
const char *ntop_rc = ipv6_pton_rc == 1 ?
inet_ntop(AF_INET6, &buf.in6, str, INET6_ADDRSTRLEN) :
inet_ntop(AF_INET, &buf.in4, str, INET6_ADDRSTRLEN);
if(ntop_rc == NULL) {
traceEvent(TRACE_ERROR,"Can't parse IP %s",address);
return false;
}
traceEvent(TRACE_INFO, "Adding %s/%d to the local network list",
ntop_rc, bits);
return true;
}
/* ********************** */
//#define DEBUG
#undef DEBUG
/* Utility function */
uint32_t str2addr(char *address) {
int a, b, c, d;
if(sscanf(address, "%d.%d.%d.%d", &a, &b, &c, &d) != 4) {
return(0);
} else
return(((a & 0xff) << 24) + ((b & 0xff) << 16) + ((c & 0xff) << 8) + (d & 0xff));
}
/* ************************************************ */
static char hex[] = "0123456789ABCDEF";
char* etheraddr_string(const uint8_t *ep, char *buf) {
uint i, j;
char *cp;
cp = buf;
if ((j = *ep >> 4) != 0)
*cp++ = hex[j];
else
*cp++ = '0';
*cp++ = hex[*ep++ & 0xf];
for(i = 5; (int)--i >= 0;) {
*cp++ = ':';
if ((j = *ep >> 4) != 0)
*cp++ = hex[j];
else
*cp++ = '0';
*cp++ = hex[*ep++ & 0xf];
}
*cp = '\0';
return (buf);
}
/* ****************************************** */
/*
UNIX was not designed to stop you from doing stupid things, because that
would also stop you from doing clever things.
-- Doug Gwyn
*/
void maximize_socket_buffer(int sock_fd, int buf_type) {
int i, rcv_buffsize_base, rcv_buffsize, max_buf_size = 1024 * 2 * 1024 /* 2 MB */, debug = 0;
socklen_t len = sizeof(rcv_buffsize_base);
if(getsockopt(sock_fd, SOL_SOCKET, buf_type, &rcv_buffsize_base, &len) < 0) {
traceEvent(TRACE_ERROR, "Unable to read socket receiver buffer size [%s]",
strerror(errno));
return;
} else {
if(debug) traceEvent(TRACE_INFO, "Default socket %s buffer size is %d",
buf_type == SO_RCVBUF ? "receive" : "send",
rcv_buffsize_base);
}
for(i=2;; i++) {
rcv_buffsize = i * rcv_buffsize_base;
if(rcv_buffsize > max_buf_size) break;
if(setsockopt(sock_fd, SOL_SOCKET, buf_type, &rcv_buffsize, sizeof(rcv_buffsize)) < 0) {
if(debug) traceEvent(TRACE_ERROR, "Unable to set socket %s buffer size [%s]",
buf_type == SO_RCVBUF ? "receive" : "send",
strerror(errno));
break;
} else
if(debug) traceEvent(TRACE_INFO, "%s socket buffer size set %d",
buf_type == SO_RCVBUF ? "Receive" : "Send",
rcv_buffsize);
}
}
/* ****************************************** */
#ifdef linux
void setCpuAffinity(char *cpuId) {
pid_t p = 0; /* current process */
int ret, num = 0;
cpu_set_t cpu_set;
int numCpus = sysconf(_SC_NPROCESSORS_CONF);
char *strtokState, *cpu, _cpuId[256] = { 0 };
if(cpuId == NULL)
return; /* No affinity */
traceEvent(TRACE_INFO, "This computer has %d processor(s)\n", numCpus);
CPU_ZERO(&cpu_set);
cpu = strtok_r(cpuId, ",", &strtokState);
while(cpu != NULL) {
int id = atoi(cpu);
if((id >= numCpus) || (id < 0)) {
traceEvent(TRACE_ERROR, "Skept CPU id %d as you have %d available CPU(s) [0..%d]", id, numCpus, numCpus-1);
} else {
CPU_SET(id, &cpu_set), num++;
traceEvent(TRACE_INFO, "Adding CPU %d to the CPU affinity set", id);
snprintf(&_cpuId[strlen(_cpuId)], sizeof(_cpuId)-strlen(_cpuId)-1, "%s%d", (_cpuId[0] != '\0') ? "," : "", id);
}
cpu = strtok_r(NULL, ",", &strtokState);
}
if(num == 0) {
traceEvent(TRACE_WARNING, "No valid CPU id has been selected: skipping CPU affinity set");
return;
}
ret = sched_setaffinity(p, sizeof(cpu_set_t), &cpu_set);
if(ret == 0) {
traceEvent(TRACE_NORMAL, "CPU affinity successfully set to %s", _cpuId);
} else {
traceEvent(TRACE_ERROR, "Unable to set CPU affinity to %s [ret: %d]",
_cpuId, ret);
}
}
/* ******************************************* */
#endif
/* ******************************************* */
void dropPrivileges(void) {
struct passwd *pw = NULL;
if(readOnlyGlobals.do_not_drop_privileges) return;
#ifdef HAVE_NETFILTER
if(readOnlyGlobals.nf.fd >= 0) {
traceEvent(TRACE_WARNING, "Don't dropping privileges (required by NetFilter)");
return;
}
#endif
if(getgid() && getuid()) {
traceEvent(TRACE_NORMAL, "Privileges are not dropped as we're not superuser");
return;
}
pw = getpwnam(readOnlyGlobals.unprivilegedUser);
/* if(pw == NULL) pw = getpwnam(username = "anonymous"); */
if(pw != NULL) {
/* Change owner to pid file */
if(readOnlyGlobals.pidPath) {
int changeLogOwner = chown (readOnlyGlobals.pidPath, pw->pw_uid, pw->pw_gid);
if(changeLogOwner != 0)
traceEvent(TRACE_ERROR, "Unable to change owner to PID in file %s",
readOnlyGlobals.pidPath);
}
/* Drop privileges */
if((setgid(pw->pw_gid) != 0) || (setuid(pw->pw_uid) != 0)) {
traceEvent(TRACE_WARNING, "Unable to drop privileges [%s]",
strerror(errno));
} else
traceEvent(TRACE_NORMAL, "nProbe changed user to '%s'",
readOnlyGlobals.unprivilegedUser);
} else {
traceEvent(TRACE_WARNING, "Unable to locate user %s",
readOnlyGlobals.unprivilegedUser);
}
umask(0);
}
/* ******************************************* */
static char* LogEventSeverity2Str(LogEventSeverity event_severity) {
switch(event_severity) {
case severity_error: return("ERROR");
case severity_warning: return("WARN");
case severity_info: return("INFO");
default: return("???");
}
}
/* ******************************************* */
static char* LogEventType2Str(LogEventType event_type) {
switch(event_type) {
case probe_started: return("F2K_START");
case probe_stopped: return("F2K_STOP");
case packet_drop: return("CAPTURE_DROP");
case flow_export_error: return("FLOW_EXPORT_ERROR");
case collector_connection_error: return("COLLECTOR_CONNECTION_ERROR");
case collector_connected: return("CONNECTED_TO_COLLECTOR");
case collector_disconnected: return("DISCONNECTED_FROM_COLLECTOR");
case collector_too_slow: return("COLLECTOR_TOO_SLOW");
default: return("???");
}
}
/* ******************************************* */
void dumpLogEvent(LogEventType event_type, LogEventSeverity severity, char *message) {
FILE *fd;
time_t theTime;
char theDate[32];
static int skipDump = 0;
if(readOnlyGlobals.eventLogPath == NULL) return;
fd = fopen(readOnlyGlobals.eventLogPath, "a");
if(fd == NULL) {
if(!skipDump) {
traceEvent(TRACE_WARNING, "Unable to append event on file %s",
readOnlyGlobals.eventLogPath);
skipDump = 1;
}
return;
} else
skipDump = 0;
// theTime = time(NULL);
strftime(theDate, sizeof(theDate), "%d/%b/%Y %H:%M:%S", localtime(&theTime));
fprintf(fd, "%s\t%s\t%s\t\t%s\n", theDate,
LogEventSeverity2Str(severity),
LogEventType2Str(event_type), message ? message : "");
fclose(fd);
}
/* ****************************************************** */
uint64_t to_msec(struct timeval *tv) {
uint64_t val = (uint64_t)tv->tv_sec * 1000;
val += (uint64_t)tv->tv_usec/1000;
return(val);
}
/* ****************************************************** */
// @TODO recover HAVE_PTHREAD_SET_AFFINITY
// @TODO compare with bindthread2core
void setThreadAffinity(uint core_id) {
#ifdef HAVE_PTHREAD_SET_AFFINITY
if((getNumCores() > 1) && (readOnlyGlobals.numProcessThreads > 1)) {
/* Bind this thread to a specific core */
int rc;
#ifdef __NetBSD__
cpuset_t *cset;
cpuid_t ci;
cset = cpuset_create();
if (cset == NULL) {
err(EXIT_FAILURE, "cpuset_create");
}
ci = core_id;
cpuset_set(ci, cset);
rc = pthread_setaffinity_np(pthread_self(), cpuset_size(cset), cset);
#else
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
CPU_SET(core_id, &cpuset);
rc = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
#endif
if(rc != 0) {
traceEvent(TRACE_ERROR, "Error while binding to core %ld: errno=%i\n",
core_id, rc);
} else {
traceEvent(TRACE_INFO, "Bound thread to core %lu/%u\n", core_id, getNumCores());
}
}
#else // HAVE_PTHREAD_SET_AFFINITY
(void)core_id;
#endif
}
/* ****************************************************** */
#ifdef HAVE_PTHREAD_SET_AFFINITY
static size_t getNumCores(void) {
#ifdef linux
return(sysconf(_SC_NPROCESSORS_CONF));
#else
return(ACT_NUM_PCAP_THREADS);
#endif
}
#endif
/* *********************************************** */
#ifdef HAVE_PTHREAD_SET_AFFINITY
static int bindthread2core(pthread_t thread_id, int core_id) {
cpu_set_t cpuset;
int s;
CPU_ZERO(&cpuset);
CPU_SET(core_id, &cpuset);
if((s = pthread_setaffinity_np(thread_id, sizeof(cpu_set_t), &cpuset)) != 0) {
traceEvent(TRACE_WARNING, "Error while binding to core %u: errno=%i\n", core_id, s);
return(-1);
} else {
return(0);
}
}
#endif
/* ****************************************************** */
/* ENEO STUFFS */
/* ****************************************************** */
void check_if_reload(/*const int templateElementId,*/struct rb_databases * rb_databases)
{
assert(rb_databases);
if(unlikely(rb_databases->reload_hosts_database || rb_databases->reload_nets_database))
{
if(unlikely(readOnlyGlobals.enable_debug))
traceEvent(TRACE_NORMAL,"reloading hosts_database");
pthread_rwlock_wrlock(&rb_databases->mutex);
freeHostsList(rb_databases->ip_name_as_list);
freeHostsList(rb_databases->nets_name_as_list);
rb_databases->ip_name_as_list = rb_databases->nets_name_as_list = NULL;
parseHostsList(rb_databases->hosts_database_path);
rb_databases->reload_hosts_database = rb_databases->reload_nets_database = 0;
pthread_rwlock_unlock(&rb_databases->mutex);
}
if(unlikely(rb_databases->reload_apps_database))
{
if(unlikely(readOnlyGlobals.enable_debug))
traceEvent(TRACE_NORMAL,"reloading apps_database");
pthread_rwlock_wrlock(&rb_databases->mutex);
if(rb_databases->apps_name_as_list)
deleteNumNameAssocTree(rb_databases->apps_name_as_list);
rb_databases->apps_name_as_list = newNumNameAssocTree();
char buf[1024];
snprintf(buf,1024,"%s%s",rb_databases->hosts_database_path,"/applications");
parseAppList(buf);
rb_databases->reload_apps_database = 0;
pthread_rwlock_unlock(&rb_databases->mutex);
}