int main( int argc, char **argv ) {
struct stat stat_buff;
char *rfile, *ffile, *filter, *tstring;
int c, confirm, ffd, ret, blast, netflow_version;
unsigned int delay, count, sockbuff_size;
time_t t_start, t_end;
rfile = ffile = filter = tstring = NULL;
t_start = t_end = 0;
peer.hostname = NULL;
peer.port = DEFAULTCISCOPORT;
peer.mcast = 0;
peer.family = AF_UNSPEC;
peer.sockfd = 0;
delay = 1;
count = 0xFFFFFFFF;
sockbuff_size = 0;
netflow_version = 5;
blast = 0;
verbose = 0;
confirm = 0;
while ((c = getopt(argc, argv, "46BhH:i:K:L:p:d:c:b:j:r:f:t:v:VY")) != EOF) {
switch (c) {
case 'h':
usage(argv[0]);
exit(0);
break;
case 'B':
blast = 1;
break;
case 'V':
printf("%s: Version: %s\n",argv[0], nfdump_version);
exit(0);
break;
case 'Y':
confirm = 1;
break;
case 'H':
case 'i': // compatibility with old version
peer.hostname = strdup(optarg);
peer.mcast = 0;
break;
case 'j':
if ( peer.hostname == NULL ) {
peer.hostname = strdup(optarg);
peer.mcast = 1;
} else {
LogError("ERROR, -H(-i) and -j are mutually exclusive!!\n");
exit(255);
}
break;
case 'K':
LogError("*** Anonymization moved! Use nfanon to anonymize flows first!\n");
exit(255);
break;
case 'L':
if ( !InitLog(argv[0], optarg) )
exit(255);
break;
case 'p':
peer.port = strdup(optarg);
break;
case 'd':
delay = atoi(optarg);
break;
case 'v':
netflow_version = atoi(optarg);
if ( netflow_version != 5 && netflow_version != 9 ) {
LogError("Invalid netflow version: %s. Accept only 5 or 9!\n", optarg);
exit(255);
}
break;
case 'c':
count = atoi(optarg);
break;
case 'b':
sockbuff_size = atoi(optarg);
break;
case 'f':
ffile = optarg;
break;
case 't':
tstring = optarg;
break;
case 'r':
rfile = optarg;
break;
case '4':
if ( peer.family == AF_UNSPEC )
peer.family = AF_INET;
else {
LogError("ERROR, Accepts only one protocol IPv4 or IPv6!\n");
exit(255);
}
break;
case '6':
if ( peer.family == AF_UNSPEC )
peer.family = AF_INET6;
else {
LogError("ERROR, Accepts only one protocol IPv4 or IPv6!\n");
exit(255);
}
break;
default:
usage(argv[0]);
exit(0);
}
}
if (argc - optind > 1) {
usage(argv[0]);
exit(255);
} else {
/* user specified a pcap filter */
filter = argv[optind];
}
if ( peer.hostname == NULL )
peer.hostname = DEFAULTHOSTNAME;
if ( !filter && ffile ) {
if ( stat(ffile, &stat_buff) ) {
perror("Can't stat file");
exit(255);
}
filter = (char *)malloc(stat_buff.st_size);
if ( !filter ) {
perror("Memory error");
exit(255);
}
ffd = open(ffile, O_RDONLY);
if ( ffd < 0 ) {
perror("Can't open file");
exit(255);
}
ret = read(ffd, (void *)filter, stat_buff.st_size);
if ( ret < 0 ) {
perror("Error reading file");
close(ffd);
exit(255);
}
close(ffd);
}
if ( !filter )
filter = "any";
Engine = CompileFilter(filter);
if ( !Engine )
exit(254);
if ( peer.mcast )
peer.sockfd = Multicast_send_socket (peer.hostname, peer.port, peer.family, sockbuff_size,
&peer.addr, &peer.addrlen );
else
peer.sockfd = Unicast_send_socket (peer.hostname, peer.port, peer.family, sockbuff_size,
&peer.addr, &peer.addrlen );
if ( peer.sockfd <= 0 ) {
exit(255);
}
if ( blast ) {
send_blast(delay );
exit(0);
}
extension_map_list = InitExtensionMaps(NEEDS_EXTENSION_LIST);
SetupInputFileSequence(NULL,rfile, NULL);
if ( tstring ) {
if ( !ScanTimeFrame(tstring, &t_start, &t_end) )
exit(255);
}
send_data(rfile, t_start, t_end, count, delay, confirm, netflow_version);
FreeExtensionMaps(extension_map_list);
return 0;
}
int main(int argc, char **argv) {
char *bindhost, *filter, *datadir, pidstr[32], *launch_process;
char *userid, *groupid, *checkptr, *listenport, *mcastgroup, *extension_tags;
char *Ident, *dynsrcdir, pidfile[MAXPATHLEN];
struct stat fstat;
packet_function_t receive_packet;
send_peer_t peer;
FlowSource_t *fs;
struct sigaction act;
int family, bufflen;
time_t twin, t_start;
int sock, synctime, do_daemonize, expire, report_sequence, do_xstat;
int subdir_index, sampling_rate, compress;
int c;
#ifdef PCAP
char *pcap_file;
pcap_file = NULL;
#endif
receive_packet = recvfrom;
verbose = synctime = do_daemonize = 0;
bufflen = 0;
family = AF_UNSPEC;
launcher_pid = 0;
launcher_alive = 0;
report_sequence = 0;
listenport = DEFAULTCISCOPORT;
bindhost = NULL;
mcastgroup = NULL;
pidfile[0] = 0;
filter = NULL;
launch_process = NULL;
userid = groupid = NULL;
twin = TIME_WINDOW;
datadir = NULL;
subdir_index = 0;
expire = 0;
sampling_rate = 1;
compress = 0;
do_xstat = 0;
memset((void *)&peer, 0, sizeof(send_peer_t));
peer.family = AF_UNSPEC;
Ident = "none";
FlowSource = NULL;
extension_tags = DefaultExtensions;
dynsrcdir = NULL;
while ((c = getopt(argc, argv, "46ef:whEVI:DB:b:j:l:M:n:p:P:R:S:s:T:t:x:Xru:g:z")) != EOF) {
switch (c) {
case 'h':
usage(argv[0]);
exit(0);
break;
case 'u':
userid = optarg;
break;
case 'g':
groupid = optarg;
break;
case 'e':
expire = 1;
break;
case 'f': {
#ifdef PCAP
struct stat fstat;
pcap_file = optarg;
stat(pcap_file, &fstat);
if ( !S_ISREG(fstat.st_mode) ) {
fprintf(stderr, "Not a regular file: %s\n", pcap_file);
exit(254);
}
#else
fprintf(stderr, "PCAP reader not compiled! Option ignored!\n");
#endif
} break;
case 'E':
verbose = 1;
Setv6Mode(1);
break;
case 'V':
printf("%s: Version: %s\n",argv[0], nfdump_version);
exit(0);
break;
case 'X':
do_xstat = 1;
break;
case 'D':
do_daemonize = 1;
break;
case 'I':
Ident = strdup(optarg);
break;
case 'M':
dynsrcdir = strdup(optarg);
if ( strlen(dynsrcdir) > MAXPATHLEN ) {
fprintf(stderr, "ERROR: Path too long!\n");
exit(255);
}
if ( stat(dynsrcdir, &fstat) < 0 ) {
fprintf(stderr, "stat() failed on %s: %s\n", dynsrcdir, strerror(errno));
exit(255);
}
if ( !(fstat.st_mode & S_IFDIR) ) {
fprintf(stderr, "No such directory: %s\n", dynsrcdir);
break;
}
if ( !SetDynamicSourcesDir(&FlowSource, dynsrcdir) ) {
fprintf(stderr, "-l, -M and -n are mutually exclusive\n");
break;
}
break;
case 'n':
if ( AddFlowSource(&FlowSource, optarg) != 1 )
exit(255);
break;
case 'w':
synctime = 1;
break;
case 'B':
bufflen = strtol(optarg, &checkptr, 10);
if ( (checkptr != NULL && *checkptr == 0) && bufflen > 0 )
break;
fprintf(stderr,"Argument error for -B\n");
exit(255);
case 'b':
bindhost = optarg;
break;
case 'j':
mcastgroup = optarg;
break;
case 'p':
listenport = optarg;
break;
case 'P':
if ( optarg[0] == '/' ) { // absolute path given
strncpy(pidfile, optarg, MAXPATHLEN-1);
} else { // path relative to current working directory
char tmp[MAXPATHLEN];
if ( !getcwd(tmp, MAXPATHLEN-1) ) {
fprintf(stderr, "Failed to get current working directory: %s\n", strerror(errno));
exit(255);
}
tmp[MAXPATHLEN-1] = 0;
snprintf(pidfile, MAXPATHLEN - 1 - strlen(tmp), "%s/%s", tmp, optarg);
}
// pidfile now absolute path
pidfile[MAXPATHLEN-1] = 0;
break;
case 'R': {
char *p = strchr(optarg, '/');
if ( p ) {
*p++ = '\0';
peer.port = strdup(p);
} else {
peer.port = DEFAULTCISCOPORT;
}
peer.hostname = strdup(optarg);
break; }
case 'r':
report_sequence = 1;
break;
case 's':
// a negative sampling rate is set as the overwrite sampling rate
sampling_rate = (int)strtol(optarg, (char **)NULL, 10);
if ( (sampling_rate == 0 ) ||
(sampling_rate < 0 && sampling_rate < -10000000) ||
(sampling_rate > 0 && sampling_rate > 10000000) ) {
fprintf(stderr, "Invalid sampling rate: %s\n", optarg);
exit(255);
}
break;
case 'T': {
size_t len = strlen(optarg);
extension_tags = optarg;
if ( len == 0 || len > 128 ) {
fprintf(stderr, "Extension length error. Unexpected option '%s'\n", extension_tags);
exit(255);
}
break; }
case 'l':
datadir = optarg;
if ( strlen(datadir) > MAXPATHLEN ) {
fprintf(stderr, "ERROR: Path too long!\n");
exit(255);
}
if ( stat(datadir, &fstat) < 0 ) {
fprintf(stderr, "stat() failed on %s: %s\n", datadir, strerror(errno));
exit(255);
}
if ( !(fstat.st_mode & S_IFDIR) ) {
fprintf(stderr, "No such directory: %s\n", datadir);
break;
}
break;
case 'S':
subdir_index = atoi(optarg);
break;
case 't':
twin = atoi(optarg);
if ( twin <= 0 ) {
fprintf(stderr, "ERROR: time frame <= 0\n");
exit(255);
}
if (twin < 10) {
fprintf(stderr, "WARNING, Very small time frame - < 10s!\n");
}
break;
case 'x':
launch_process = optarg;
break;
case 'z':
compress = 1;
break;
case '4':
if ( family == AF_UNSPEC )
family = AF_INET;
else {
fprintf(stderr, "ERROR, Accepts only one protocol IPv4 or IPv6!\n");
exit(255);
}
break;
case '6':
if ( family == AF_UNSPEC )
family = AF_INET6;
else {
fprintf(stderr, "ERROR, Accepts only one protocol IPv4 or IPv6!\n");
exit(255);
}
break;
default:
usage(argv[0]);
exit(255);
}
}
if ( FlowSource == NULL && datadir == NULL && dynsrcdir == NULL ) {
fprintf(stderr, "ERROR, Missing -n (-l/-I) or -M source definitions\n");
exit(255);
}
if ( FlowSource == NULL && datadir != NULL && !AddDefaultFlowSource(&FlowSource, Ident, datadir) ) {
fprintf(stderr, "Failed to add default data collector directory\n");
exit(255);
}
if ( bindhost && mcastgroup ) {
fprintf(stderr, "ERROR, -b and -j are mutually exclusive!!\n");
exit(255);
}
if ( do_daemonize && !InitLog(argv[0], SYSLOG_FACILITY)) {
exit(255);
}
InitExtensionMaps(NO_EXTENSION_LIST);
SetupExtensionDescriptors(strdup(extension_tags));
// Debug code to read from pcap file
#ifdef PCAP
sock = 0;
if ( pcap_file ) {
printf("Setup pcap reader\n");
setup_packethandler(pcap_file, NULL);
receive_packet = NextPacket;
} else
#endif
if ( mcastgroup )
sock = Multicast_receive_socket (mcastgroup, listenport, family, bufflen);
else
sock = Unicast_receive_socket(bindhost, listenport, family, bufflen );
if ( sock == -1 ) {
fprintf(stderr,"Terminated due to errors.\n");
exit(255);
}
if ( peer.hostname ) {
peer.sockfd = Unicast_send_socket (peer.hostname, peer.port, peer.family, bufflen,
&peer.addr, &peer.addrlen );
if ( peer.sockfd <= 0 )
exit(255);
LogInfo("Replay flows to host: %s port: %s", peer.hostname, peer.port);
}
if ( sampling_rate < 0 ) {
default_sampling = -sampling_rate;
overwrite_sampling = default_sampling;
} else {
default_sampling = sampling_rate;
}
SetPriv(userid, groupid);
if ( subdir_index && !InitHierPath(subdir_index) ) {
close(sock);
exit(255);
}
// check if pid file exists and if so, if a process with registered pid is running
if ( strlen(pidfile) ) {
int pidf;
pidf = open(pidfile, O_RDONLY, 0);
if ( pidf > 0 ) {
// pid file exists
char s[32];
ssize_t len;
len = read(pidf, (void *)s, 31);
close(pidf);
s[31] = '\0';
if ( len < 0 ) {
fprintf(stderr, "read() error existing pid file: %s\n", strerror(errno));
exit(255);
} else {
unsigned long pid = atol(s);
if ( pid == 0 ) {
// garbage - use this file
unlink(pidfile);
} else {
if ( kill(pid, 0) == 0 ) {
// process exists
fprintf(stderr, "A process with pid %lu registered in pidfile %s is already running!\n",
pid, strerror(errno));
exit(255);
} else {
// no such process - use this file
unlink(pidfile);
}
}
}
} else {
if ( errno != ENOENT ) {
fprintf(stderr, "open() error existing pid file: %s\n", strerror(errno));
exit(255);
} // else errno == ENOENT - no file - this is fine
}
}
if (argc - optind > 1) {
usage(argv[0]);
close(sock);
exit(255);
} else {
/* user specified a pcap filter */
filter = argv[optind];
}
t_start = time(NULL);
if ( synctime )
t_start = t_start - ( t_start % twin);
if ( do_daemonize ) {
verbose = 0;
daemonize();
}
if (strlen(pidfile)) {
pid_t pid = getpid();
int pidf = open(pidfile, O_RDWR|O_TRUNC|O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if ( pidf == -1 ) {
LogError("Error opening pid file: '%s' %s", pidfile, strerror(errno));
close(sock);
exit(255);
}
snprintf(pidstr,31,"%lu\n", (unsigned long)pid);
if ( write(pidf, pidstr, strlen(pidstr)) <= 0 ) {
LogError("Error write pid file: '%s' %s", pidfile, strerror(errno));
}
close(pidf);
}
done = 0;
if ( launch_process || expire ) {
// for efficiency reason, the process collecting the data
// and the process launching processes, when a new file becomes
// available are separated. Communication is done using signals
// as well as shared memory
// prepare shared memory
shmem = mmap(0, sizeof(srecord_t), PROT_READ | PROT_WRITE, MAP_ANON | MAP_SHARED, -1, 0);
if ( shmem == (caddr_t)-1 ) {
LogError("mmap() error: %s", strerror(errno));
close(sock);
exit(255);
}
launcher_pid = fork();
switch (launcher_pid) {
case 0:
// child
close(sock);
launcher((char *)shmem, FlowSource, launch_process, expire);
_exit(0);
break;
case -1:
LogError("fork() error: %s", strerror(errno));
if ( strlen(pidfile) )
unlink(pidfile);
exit(255);
break;
default:
// parent
launcher_alive = 1;
LogInfo("Launcher[%i] forked", launcher_pid);
}
}
fs = FlowSource;
while ( fs ) {
if ( InitBookkeeper(&fs->bookkeeper, fs->datadir, getpid(), launcher_pid) != BOOKKEEPER_OK ) {
LogError("initialize bookkeeper failed.");
// release all already allocated bookkeepers
fs = FlowSource;
while ( fs && fs->bookkeeper ) {
ReleaseBookkeeper(fs->bookkeeper, DESTROY_BOOKKEEPER);
fs = fs->next;
}
close(sock);
if ( launcher_pid )
kill_launcher(launcher_pid);
if ( strlen(pidfile) )
unlink(pidfile);
exit(255);
}
// Init the extension map list
if ( !InitExtensionMapList(fs) ) {
// error message goes to syslog
exit(255);
}
fs = fs->next;
}
/* Signal handling */
memset((void *)&act,0,sizeof(struct sigaction));
act.sa_handler = IntHandler;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
sigaction(SIGTERM, &act, NULL);
sigaction(SIGINT, &act, NULL);
sigaction(SIGHUP, &act, NULL);
sigaction(SIGALRM, &act, NULL);
sigaction(SIGCHLD, &act, NULL);
LogInfo("Startup.");
run(receive_packet, sock, peer, twin, t_start, report_sequence, subdir_index, compress, do_xstat);
close(sock);
kill_launcher(launcher_pid);
fs = FlowSource;
while ( fs && fs->bookkeeper ) {
dirstat_t *dirstat;
// if we do not auto expire and there is a stat file, update the stats before we leave
if ( expire == 0 && ReadStatInfo(fs->datadir, &dirstat, LOCK_IF_EXISTS) == STATFILE_OK ) {
UpdateBookStat(dirstat, fs->bookkeeper);
WriteStatInfo(dirstat);
LogInfo("Updating statinfo in directory '%s'", datadir);
}
ReleaseBookkeeper(fs->bookkeeper, DESTROY_BOOKKEEPER);
fs = fs->next;
}
LogInfo("Terminating nfcapd.");
EndLog();
if ( strlen(pidfile) )
unlink(pidfile);
return 0;
} /* End of main */
