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geoip.c
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/*
* netsniff-ng - the packet sniffing beast
* Copyright 2013 Daniel Borkmann.
* Subject to the GPL, version 2.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <GeoIP.h>
#include <GeoIPCity.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "built_in.h"
#include "die.h"
#include "ioops.h"
#include "str.h"
#include "xmalloc.h"
#include "zlib.h"
#include "geoip.h"
struct file {
const char *desc, *local;
const char *remote, *possible_prefix;
};
#define PRE "/download/geoip/database"
static const struct file files[] = {
[GEOIP_CITY_EDITION_REV1] = {
.desc = "City IPv4",
.local = DATDIR_STRING "/city4.dat",
.remote = "/GeoLiteCity.dat.gz",
.possible_prefix = PRE,
},
[GEOIP_CITY_EDITION_REV1_V6] = {
.desc = "City IPv6",
.local = DATDIR_STRING "/city6.dat",
.remote = "/GeoLiteCityv6.dat.gz",
.possible_prefix = PRE "/GeoLiteCityv6-beta",
},
[GEOIP_COUNTRY_EDITION] = {
.desc = "Country IPv4",
.local = DATDIR_STRING "/country4.dat",
.remote = "/GeoIP.dat.gz",
.possible_prefix = PRE "/GeoLiteCountry",
},
[GEOIP_COUNTRY_EDITION_V6] = {
.desc = "Country IPv6",
.local = DATDIR_STRING "/country6.dat",
.remote = "/GeoIPv6.dat.gz",
.possible_prefix = PRE,
},
[GEOIP_ASNUM_EDITION] = {
.desc = "AS Numbers IPv4",
.local = DATDIR_STRING "/asname4.dat",
.remote = "/GeoIPASNum.dat.gz",
.possible_prefix = PRE "/asnum",
},
[GEOIP_ASNUM_EDITION_V6] = {
.desc = "AS Numbers IPv6",
.local = DATDIR_STRING "/asname6.dat",
.remote = "/GeoIPASNumv6.dat.gz",
.possible_prefix = PRE "/asnum",
},
};
static GeoIP *gi4_asname = NULL, *gi6_asname = NULL;
static GeoIP *gi4_country = NULL, *gi6_country = NULL;
static GeoIP *gi4_city = NULL, *gi6_city = NULL;
static char *servers[16] = { NULL };
#define CITYV4 (1 << 0)
#define CITYV6 (1 << 1)
#define COUNTRYV4 (1 << 2)
#define COUNTRYV6 (1 << 3)
#define ASNAMV4 (1 << 4)
#define ASNAMV6 (1 << 5)
#define HAVEALL (CITYV4 | CITYV6 | COUNTRYV4 | COUNTRYV6 | ASNAMV4 | ASNAMV6)
static int geoip_db_present = 0;
int geoip_working(void)
{
return geoip_db_present == HAVEALL;
}
static int geoip_get_remote_fd(const char *server, const char *port)
{
int ret, fd = -1;
struct addrinfo hints, *ahead, *ai;
bug_on(!server || !port);
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_NUMERICSERV;
ret = getaddrinfo(server, port, &hints, &ahead);
if (ret != 0)
return -EIO;
for (ai = ahead; ai != NULL && fd < 0; ai = ai->ai_next) {
fd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
if (fd < 0)
continue;
ret = connect(fd, ai->ai_addr, ai->ai_addrlen);
if (ret < 0) {
close(fd);
fd = -1;
continue;
}
break;
}
freeaddrinfo(ahead);
return fd;
}
static void geoip_inflate(int which)
{
int ret, ret2 = 1;
gzFile fpi;
FILE *fpo;
char zfile[128], raw[4096];
slprintf(zfile, sizeof(zfile), "%s.gz", files[which].local);
fpi = gzopen(zfile, "rb");
if (fpi == NULL)
panic("No %s file!\n", zfile);
fpo = fopen(files[which].local, "wb");
if (fpo == NULL)
panic("Cannot create %s!\n", files[which].local);
while ((ret = gzread(fpi, raw, sizeof(raw))) && ret2)
ret2 = fwrite(raw, ret, 1, fpo);
if (!gzeof(fpi))
panic("Error in gzread: %s\n", gzerror(fpi, &ret));
gzclose(fpi);
fclose(fpo);
}
static int geoip_get_database(const char *host, int which)
{
int found, sock, fd, i, good, retry = 0;
ssize_t ret, len, rtotlen = 0, totlen = 0;
char raw[4096], *ptr, zfile[128];
size_t lenl = strlen("Content-Length: ");
size_t lent = strlen("HTTP/1.1 200 OK");
size_t lenc = strlen("\r\n\r\n");
const char *http_req_fmt = "GET %s%s HTTP/1.1\r\n"
"Connection: close\r\n"
"Host: %s\r\n\r\n";
again:
found = good = 0;
ptr = NULL;
len = 0;
sock = geoip_get_remote_fd(host, "80");
if (sock < 0)
return -EIO;
slprintf(raw, sizeof(raw), http_req_fmt,
retry ? files[which].possible_prefix : "",
files[which].remote, host);
ret = write(sock, raw, strlen(raw));
if (ret <= 0) {
close(sock);
return -EIO;
}
slprintf(zfile, sizeof(zfile), "%s.gz", files[which].local);
fd = open_or_die_m(zfile, O_WRONLY | O_CREAT | O_TRUNC, DEFFILEMODE);
memset(raw, 0, sizeof(raw));
ret = read(sock, raw, sizeof(raw));
if (ret <= 0) {
close(fd);
close(sock);
return -EIO;
}
for (i = 0; i < ret; i++) {
if (!strncmp(raw + i, "Content-Length: ", min_t(size_t, ret - i, lenl))) {
ptr = raw + i + lenl;
rtotlen = strtoul(ptr, NULL, 10);
}
if (!strncmp(raw + i, "HTTP/1.1 200 OK", min_t(size_t, ret - i, lent)))
good = 1;
if (!strncmp(raw + i, "\r\n\r\n", min_t(size_t, ret - i, lenc))) {
ptr = raw + i + lenc;
len = ret - i - lenc;
found = 1;
break;
}
}
if (!found || ptr >= raw + ret || len < 0 || rtotlen == 0 || good == 0) {
close(fd);
close(sock);
if (retry == 0) {
retry = 1;
goto again;
}
return -ENOENT;
}
do {
write_or_die(fd, ptr, len);
totlen += len;
printf("\r%s [%.2f%%, %zd/%zd, %s]", files[which].desc,
100.f * totlen / rtotlen, totlen, rtotlen, host);
fflush(stdout);
memset(raw, 0, sizeof(raw));
ret = read(sock, raw, sizeof(raw));
ptr = raw;
len = ret;
} while (ret > 0);
printf("\n");
close(fd);
close(sock);
if (totlen != rtotlen) {
unlink(files[which].local);
return -EIO;
}
geoip_inflate(which);
unlink(zfile);
return 0;
}
static GeoIPRecord *geoip4_get_record(struct sockaddr_in *sa)
{
bug_on(gi4_city == NULL);
return GeoIP_record_by_ipnum(gi4_city, ntohl(sa->sin_addr.s_addr));
}
static GeoIPRecord *geoip6_get_record(struct sockaddr_in6 *sa)
{
bug_on(gi6_city == NULL);
return GeoIP_record_by_ipnum_v6(gi6_city, sa->sin6_addr);
}
const char *geoip4_as_name(struct sockaddr_in *sa)
{
bug_on(gi4_asname == NULL);
return GeoIP_name_by_ipnum(gi4_asname, ntohl(sa->sin_addr.s_addr));
}
const char *geoip6_as_name(struct sockaddr_in6 *sa)
{
bug_on(gi6_asname == NULL);
return GeoIP_name_by_ipnum_v6(gi6_asname, sa->sin6_addr);
}
float geoip4_longitude(struct sockaddr_in *sa)
{
GeoIPRecord *record;
float longitude;
record = geoip4_get_record(sa);
if (!record)
return 0;
longitude = record->longitude;
GeoIPRecord_delete(record);
return longitude;
}
float geoip4_latitude(struct sockaddr_in *sa)
{
GeoIPRecord *record;
float latitude;
record = geoip4_get_record(sa);
if (!record)
return 0;
latitude = record->latitude;
GeoIPRecord_delete(record);
return latitude;
}
float geoip6_longitude(struct sockaddr_in6 *sa)
{
GeoIPRecord *record;
float longitude;
record = geoip6_get_record(sa);
if (!record)
return 0;
longitude = record->longitude;
GeoIPRecord_delete(record);
return longitude;
}
float geoip6_latitude(struct sockaddr_in6 *sa)
{
GeoIPRecord *record;
float latitude;
record = geoip6_get_record(sa);
if (!record)
return 0;
latitude = record->latitude;
GeoIPRecord_delete(record);
return latitude;
}
char *geoip4_city_name(struct sockaddr_in *sa)
{
GeoIPRecord *record;
char *city = NULL;
record = geoip4_get_record(sa);
if (!record)
return NULL;
if (record->city)
city = xstrdup(record->city);
GeoIPRecord_delete(record);
return city;
}
char *geoip6_city_name(struct sockaddr_in6 *sa)
{
GeoIPRecord *record;
char *city = NULL;
record = geoip6_get_record(sa);
if (!record)
return NULL;
if (record->city)
city = xstrdup(record->city);
GeoIPRecord_delete(record);
return city;
}
char *geoip4_region_name(struct sockaddr_in *sa)
{
GeoIPRecord *record;
char *region = NULL;
record = geoip4_get_record(sa);
if (!record)
return NULL;
if (record->region)
region = xstrdup(record->region);
GeoIPRecord_delete(record);
return region;
}
char *geoip6_region_name(struct sockaddr_in6 *sa)
{
GeoIPRecord *record;
char *region = NULL;
record = geoip6_get_record(sa);
if (!record)
return NULL;
if (record->region)
region = xstrdup(record->region);
GeoIPRecord_delete(record);
return region;
}
const char *geoip4_country_name(struct sockaddr_in *sa)
{
bug_on(gi4_country == NULL);
return GeoIP_country_name_by_ipnum(gi4_country, ntohl(sa->sin_addr.s_addr));
}
const char *geoip6_country_name(struct sockaddr_in6 *sa)
{
bug_on(gi6_country == NULL);
return GeoIP_country_name_by_ipnum_v6(gi6_country, sa->sin6_addr);
}
const char *geoip4_country_code3_name(struct sockaddr_in *sa)
{
bug_on(gi4_country == NULL);
return GeoIP_country_code3_by_ipnum(gi4_country, ntohl(sa->sin_addr.s_addr));
}
const char *geoip6_country_code3_name(struct sockaddr_in6 *sa)
{
bug_on(gi6_country == NULL);
return GeoIP_country_code3_by_ipnum_v6(gi6_country, sa->sin6_addr);
}
static int fdout, fderr;
/* GeoIP people were too stupid to come to the idea that you could set
* errno appropriately and return NULL instead of printing stuff from
* the library directly that no one can turn off.
*/
static void geoip_open_prepare(void)
{
fflush(stdout);
fdout = dup_or_die(1);
fflush(stderr);
fderr = dup_or_die(2);
close(1);
close(2);
}
static void geoip_open_restore(void)
{
dup2_or_die(fdout, 1);
dup2_or_die(fderr, 2);
close(fdout);
close(fderr);
}
static GeoIP *geoip_open_type(int type, int flags)
{
GeoIP *ret;
geoip_open_prepare();
ret = GeoIP_open_type(type, flags);
geoip_open_restore();
return ret;
}
static GeoIP *geoip_open(const char *filename, int flags)
{
GeoIP *ret;
geoip_open_prepare();
ret = GeoIP_open(filename, flags);
geoip_open_restore();
return ret;
}
static void init_geoip_city_open4(int enforce)
{
gi4_city = geoip_open(files[GEOIP_CITY_EDITION_REV1].local, GEOIP_MMAP_CACHE);
if (gi4_city == NULL) {
gi4_city = geoip_open_type(GEOIP_CITY_EDITION_REV1, GEOIP_MMAP_CACHE);
if (gi4_city == NULL)
if (enforce)
panic("Cannot open GeoIP4 city database, try --update!\n");
}
if (gi4_city) {
GeoIP_set_charset(gi4_city, GEOIP_CHARSET_UTF8);
geoip_db_present |= CITYV4;
}
}
static void init_geoip_city_open6(int enforce)
{
gi6_city = geoip_open(files[GEOIP_CITY_EDITION_REV1_V6].local, GEOIP_MMAP_CACHE);
if (gi6_city == NULL) {
gi6_city = geoip_open_type(GEOIP_CITY_EDITION_REV1_V6, GEOIP_MMAP_CACHE);
if (gi6_city == NULL)
if (enforce)
panic("Cannot open GeoIP6 city database, try --update!\n");
}
if (gi6_city) {
GeoIP_set_charset(gi6_city, GEOIP_CHARSET_UTF8);
geoip_db_present |= CITYV6;
}
}
static void init_geoip_city(int enforce)
{
init_geoip_city_open4(enforce);
init_geoip_city_open6(enforce);
}
static void destroy_geoip_city(void)
{
GeoIP_delete(gi4_city);
GeoIP_delete(gi6_city);
}
static void init_geoip_country_open4(int enforce)
{
gi4_country = geoip_open(files[GEOIP_COUNTRY_EDITION].local, GEOIP_MMAP_CACHE);
if (gi4_country == NULL) {
gi4_country = geoip_open_type(GEOIP_COUNTRY_EDITION, GEOIP_MMAP_CACHE);
if (gi4_country == NULL)
if (enforce)
panic("Cannot open GeoIP4 country database, try --update!\n");
}
if (gi4_country) {
GeoIP_set_charset(gi4_country, GEOIP_CHARSET_UTF8);
geoip_db_present |= COUNTRYV4;
}
}
static void init_geoip_country_open6(int enforce)
{
gi6_country = geoip_open(files[GEOIP_COUNTRY_EDITION_V6].local, GEOIP_MMAP_CACHE);
if (gi6_country == NULL) {
gi6_country = geoip_open_type(GEOIP_COUNTRY_EDITION_V6, GEOIP_MMAP_CACHE);
if (gi6_country == NULL)
if (enforce)
panic("Cannot open GeoIP6 country database, try --update!\n");
}
if (gi6_country) {
GeoIP_set_charset(gi6_country, GEOIP_CHARSET_UTF8);
geoip_db_present |= COUNTRYV6;
}
}
static void init_geoip_country(int enforce)
{
init_geoip_country_open4(enforce);
init_geoip_country_open6(enforce);
}
static void destroy_geoip_country(void)
{
GeoIP_delete(gi4_country);
GeoIP_delete(gi6_country);
}
static void init_geoip_asname_open4(int enforce)
{
gi4_asname = geoip_open(files[GEOIP_ASNUM_EDITION].local, GEOIP_MMAP_CACHE);
if (gi4_asname == NULL) {
gi4_asname = geoip_open_type(GEOIP_ASNUM_EDITION, GEOIP_MMAP_CACHE);
if (gi4_asname == NULL)
if (enforce)
panic("Cannot open GeoIP4 AS database, try --update!\n");
}
if (gi4_asname) {
GeoIP_set_charset(gi4_asname, GEOIP_CHARSET_UTF8);
geoip_db_present |= ASNAMV4;
}
}
static void init_geoip_asname_open6(int enforce)
{
gi6_asname = geoip_open(files[GEOIP_ASNUM_EDITION_V6].local, GEOIP_MMAP_CACHE);
if (gi6_asname == NULL) {
gi6_asname = geoip_open_type(GEOIP_ASNUM_EDITION_V6, GEOIP_MMAP_CACHE);
if (gi6_asname == NULL)
if (enforce)
panic("Cannot open GeoIP6 AS database, try --update!\n");
}
if (gi6_asname) {
GeoIP_set_charset(gi6_asname, GEOIP_CHARSET_UTF8);
geoip_db_present |= ASNAMV6;
}
}
static void init_geoip_asname(int enforce)
{
init_geoip_asname_open4(enforce);
init_geoip_asname_open6(enforce);
}
static void destroy_geoip_asname(void)
{
GeoIP_delete(gi4_asname);
GeoIP_delete(gi6_asname);
}
static void init_mirrors(void)
{
size_t i = 0;
FILE *fp;
char buff[256];
fp = fopen(ETCDIRE_STRING "/geoip.conf", "r");
if (!fp)
panic("Cannot open geoip.conf!\n");
memset(buff, 0, sizeof(buff));
while (fgets(buff, sizeof(buff), fp) != NULL &&
i < array_size(servers)) {
buff[strcspn(buff, "\r\n")] = 0;
buff[strcspn(buff, "\r\n")] = 0;
if (buff[0] == '#') {
memset(buff, 0, sizeof(buff));
continue;
}
servers[i++] = xstrdup(buff);
memset(buff, 0, sizeof(buff));
}
fclose(fp);
}
static void destroy_mirrors(void)
{
size_t i;
for (i = 0; i < array_size(servers); ++i)
free(servers[i]);
}
void init_geoip(int enforce)
{
init_geoip_city(enforce);
init_geoip_country(enforce);
init_geoip_asname(enforce);
}
void update_geoip(void)
{
size_t i, j;
int ret, good = 0;
init_mirrors();
for (i = 0; i < array_size(files); ++i) {
if (files[i].local && files[i].remote) {
good = 0;
for (j = 0; j < array_size(servers); ++j) {
if (servers[j] == NULL)
continue;
ret = geoip_get_database(servers[j], i);
if (!ret) {
good = 1;
break;
}
}
if (good == 0)
panic("Cannot get %s from mirrors!\n",
files[i].remote);
}
}
destroy_mirrors();
}
void destroy_geoip(void)
{
destroy_geoip_city();
destroy_geoip_country();
destroy_geoip_asname();
geoip_db_present = 0;
}