src/flowtop.c

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * By Daniel Borkmann <daniel@netsniff-ng.org>
   4  * Copyright 2011 - 2012 Daniel Borkmann.
   5  * Copyright 2011 Emmanuel Roullit.
   6  * Subject to the GPL, version 2.
   7  *
   8  * A tiny tool to provide top-like netfilter connection tracking information.
   9  *
  10  *   The Dark Lord has Nine. But we have One, mightier than they: the White
  11  *   Rider. He has passed through the fire and the abyss, and they shall
  12  *   fear him. We will go where he leads.
  13  *
  14  *     -- The Lord of the Rings, Aragorn,
  15  *        Chapter 'The White Rider'.
  16  */
  17
  18 #define _LGPL_SOURCE
  19 #include <stdio.h>
  20 #include <stdint.h>
  21 #include <stdlib.h>
  22 #include <signal.h>
  23 #include <getopt.h>
  24 #include <pthread.h>
  25 #include <signal.h>
  26 #include <netdb.h>
  27 #include <ctype.h>
  28 #include <libnetfilter_conntrack/libnetfilter_conntrack.h>
  29 #include <libnetfilter_conntrack/libnetfilter_conntrack_tcp.h>
  30 #include <libnetfilter_conntrack/libnetfilter_conntrack_dccp.h>
  31 #include <libnetfilter_conntrack/libnetfilter_conntrack_sctp.h>
  32 #include <GeoIP.h>
  33 #include <GeoIPCity.h>
  34 #include <netinet/in.h>
  35 #include <curses.h>
  36 #include <dirent.h>
  37 #include <sys/stat.h>
  38 #include <urcu.h>
  39 #include <libgen.h>
  40
  41 #include "die.h"
  42 #include "xmalloc.h"
  43 #include "xio.h"
  44 #include "xutils.h"
  45 #include "built_in.h"
  46 #include "locking.h"
  47 #include "dissector_eth.h"
  48 #include "pkt_buff.h"
  49
  50 struct geo_ip_db {
  51         GeoIP *gi4, *gi6;
  52         char *path4, *path6;
  53 };
  54
  55 struct flow_entry {
  56         uint32_t flow_id, use, status;
  57         uint8_t  l3_proto, l4_proto;
  58         uint32_t ip4_src_addr, ip4_dst_addr;
  59         uint32_t ip6_src_addr[4], ip6_dst_addr[4];
  60         uint16_t port_src, port_dst;
  61         uint8_t  tcp_state, tcp_flags, sctp_state, dccp_state;
  62         uint64_t counter_pkts, counter_bytes;
  63         uint64_t timestamp_start, timestamp_stop;
  64         char country_src[128], country_dst[128];
  65         char city_src[128], city_dst[128];
  66         char rev_dns_src[256], rev_dns_dst[256];
  67         char cmdline[256];
  68         struct flow_entry *next;
  69         int procnum, inode;
  70 };
  71
  72 struct flow_list {
  73         struct flow_entry *head;
  74         struct spinlock lock;
  75 };
  76
  77 #ifndef ATTR_TIMESTAMP_START
  78 # define ATTR_TIMESTAMP_START 63
  79 #endif
  80 #ifndef ATTR_TIMESTAMP_STOP
  81 # define ATTR_TIMESTAMP_STOP 64
  82 #endif
  83
  84 #define SCROLL_MAX 1000
  85
  86 #define INCLUDE_IPV4    (1 << 0)
  87 #define INCLUDE_IPV6    (1 << 1)
  88 #define INCLUDE_UDP     (1 << 2)
  89 #define INCLUDE_TCP     (1 << 3)
  90 #define INCLUDE_DCCP    (1 << 4)
  91 #define INCLUDE_ICMP    (1 << 5)
  92 #define INCLUDE_SCTP    (1 << 6)
  93
  94 volatile sig_atomic_t sigint = 0;
  95
  96 static int what = INCLUDE_IPV4 | INCLUDE_IPV6 | INCLUDE_TCP, show_src = 0;
  97
  98 struct geo_ip_db geo_country, geo_city;
  99
 100 static struct flow_list flow_list;
 101
 102 static const char *short_options = "vhTULKsOPDIS46";
 103 static const struct option long_options[] = {
 104         {"ipv4",        no_argument,            NULL, '4'},
 105         {"ipv6",        no_argument,            NULL, '6'},
 106         {"tcp",         no_argument,            NULL, 'T'},
 107         {"udp",         no_argument,            NULL, 'U'},
 108         {"dccp",        no_argument,            NULL, 'D'},
 109         {"icmp",        no_argument,            NULL, 'I'},
 110         {"sctp",        no_argument,            NULL, 'S'},
 111         {"show-src",    no_argument,            NULL, 's'},
 112         {"city-db4",    required_argument,      NULL, 'L'},
 113         {"country-db4", required_argument,      NULL, 'K'},
 114         {"city-db6",    required_argument,      NULL, 'O'},
 115         {"country-db6", required_argument,      NULL, 'P'},
 116         {"version",     no_argument,            NULL, 'v'},
 117         {"help",        no_argument,            NULL, 'h'},
 118         {NULL, 0, NULL, 0}
 119 };
 120
 121 static const char *const l3proto2str[AF_MAX] = {
 122         [AF_INET]                       = "ipv4",
 123         [AF_INET6]                      = "ipv6",
 124 };
 125
 126 static const char *const l4proto2str[IPPROTO_MAX] = {
 127         [IPPROTO_TCP]                   = "tcp",
 128         [IPPROTO_UDP]                   = "udp",
 129         [IPPROTO_UDPLITE]               = "udplite",
 130         [IPPROTO_ICMP]                  = "icmp",
 131         [IPPROTO_ICMPV6]                = "icmpv6",
 132         [IPPROTO_SCTP]                  = "sctp",
 133         [IPPROTO_GRE]                   = "gre",
 134         [IPPROTO_DCCP]                  = "dccp",
 135         [IPPROTO_IGMP]                  = "igmp",
 136         [IPPROTO_IPIP]                  = "ipip",
 137         [IPPROTO_EGP]                   = "egp",
 138         [IPPROTO_PUP]                   = "pup",
 139         [IPPROTO_IDP]                   = "idp",
 140         [IPPROTO_RSVP]                  = "rsvp",
 141         [IPPROTO_IPV6]                  = "ip6tun",
 142         [IPPROTO_ESP]                   = "esp",
 143         [IPPROTO_AH]                    = "ah",
 144         [IPPROTO_PIM]                   = "pim",
 145         [IPPROTO_COMP]                  = "comp",
 146 };
 147
 148 static const char *const tcp_state2str[TCP_CONNTRACK_MAX] = {
 149         [TCP_CONNTRACK_NONE]            = "NOSTATE",
 150         [TCP_CONNTRACK_SYN_SENT]        = "SYN_SENT",
 151         [TCP_CONNTRACK_SYN_RECV]        = "SYN_RECV",
 152         [TCP_CONNTRACK_ESTABLISHED]     = "ESTABLISHED",
 153         [TCP_CONNTRACK_FIN_WAIT]        = "FIN_WAIT",
 154         [TCP_CONNTRACK_CLOSE_WAIT]      = "CLOSE_WAIT",
 155         [TCP_CONNTRACK_LAST_ACK]        = "LAST_ACK",
 156         [TCP_CONNTRACK_TIME_WAIT]       = "TIME_WAIT",
 157         [TCP_CONNTRACK_CLOSE]           = "CLOSE",
 158         [TCP_CONNTRACK_SYN_SENT2]       = "SYN_SENT2",
 159 };
 160
 161 static const uint8_t tcp_states[] = {
 162         TCP_CONNTRACK_SYN_SENT,
 163         TCP_CONNTRACK_SYN_RECV,
 164         TCP_CONNTRACK_ESTABLISHED,
 165         TCP_CONNTRACK_FIN_WAIT,
 166         TCP_CONNTRACK_CLOSE_WAIT,
 167         TCP_CONNTRACK_LAST_ACK,
 168         TCP_CONNTRACK_TIME_WAIT,
 169         TCP_CONNTRACK_CLOSE,
 170         TCP_CONNTRACK_SYN_SENT2,
 171         TCP_CONNTRACK_NONE,
 172 };
 173
 174 static const char *const dccp_state2str[DCCP_CONNTRACK_MAX] = {
 175         [DCCP_CONNTRACK_NONE]           = "NOSTATE",
 176         [DCCP_CONNTRACK_REQUEST]        = "REQUEST",
 177         [DCCP_CONNTRACK_RESPOND]        = "RESPOND",
 178         [DCCP_CONNTRACK_PARTOPEN]       = "PARTOPEN",
 179         [DCCP_CONNTRACK_OPEN]           = "OPEN",
 180         [DCCP_CONNTRACK_CLOSEREQ]       = "CLOSEREQ",
 181         [DCCP_CONNTRACK_CLOSING]        = "CLOSING",
 182         [DCCP_CONNTRACK_TIMEWAIT]       = "TIMEWAIT",
 183         [DCCP_CONNTRACK_IGNORE]         = "IGNORE",
 184         [DCCP_CONNTRACK_INVALID]        = "INVALID",
 185 };
 186
 187 static const uint8_t dccp_states[] = {
 188         DCCP_CONNTRACK_NONE,
 189         DCCP_CONNTRACK_REQUEST,
 190         DCCP_CONNTRACK_RESPOND,
 191         DCCP_CONNTRACK_PARTOPEN,
 192         DCCP_CONNTRACK_OPEN,
 193         DCCP_CONNTRACK_CLOSEREQ,
 194         DCCP_CONNTRACK_CLOSING,
 195         DCCP_CONNTRACK_TIMEWAIT,
 196         DCCP_CONNTRACK_IGNORE,
 197         DCCP_CONNTRACK_INVALID,
 198 };
 199
 200 static const char *const sctp_state2str[SCTP_CONNTRACK_MAX] = {
 201         [SCTP_CONNTRACK_NONE]           = "NOSTATE",
 202         [SCTP_CONNTRACK_CLOSED]         = "CLOSED",
 203         [SCTP_CONNTRACK_COOKIE_WAIT]    = "COOKIE_WAIT",
 204         [SCTP_CONNTRACK_COOKIE_ECHOED]  = "COOKIE_ECHOED",
 205         [SCTP_CONNTRACK_ESTABLISHED]    = "ESTABLISHED",
 206         [SCTP_CONNTRACK_SHUTDOWN_SENT]  = "SHUTDOWN_SENT",
 207         [SCTP_CONNTRACK_SHUTDOWN_RECD]  = "SHUTDOWN_RECD",
 208         [SCTP_CONNTRACK_SHUTDOWN_ACK_SENT] = "SHUTDOWN_ACK_SENT",
 209 };
 210
 211 static const uint8_t sctp_states[] = {
 212         SCTP_CONNTRACK_NONE,
 213         SCTP_CONNTRACK_CLOSED,
 214         SCTP_CONNTRACK_COOKIE_WAIT,
 215         SCTP_CONNTRACK_COOKIE_ECHOED,
 216         SCTP_CONNTRACK_ESTABLISHED,
 217         SCTP_CONNTRACK_SHUTDOWN_SENT,
 218         SCTP_CONNTRACK_SHUTDOWN_RECD,
 219         SCTP_CONNTRACK_SHUTDOWN_ACK_SENT,
 220 };
 221
 222 static const struct nfct_filter_ipv4 filter_ipv4 = {
 223         .addr = __constant_htonl(INADDR_LOOPBACK),
 224         .mask = 0xffffffff,
 225 };
 226
 227 static const struct nfct_filter_ipv6 filter_ipv6 = {
 228         .addr = { 0x0, 0x0, 0x0, 0x1 },
 229         .mask = { 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff },
 230 };
 231
 232 static void signal_handler(int number)
 233 {
 234         switch (number) {
 235         case SIGINT:
 236                 sigint = 1;
 237                 break;
 238         case SIGHUP:
 239         default:
 240                 break;
 241         }
 242 }
 243
 244 static void flow_entry_from_ct(struct flow_entry *n, struct nf_conntrack *ct);
 245 static void flow_entry_get_extended(struct flow_entry *n);
 246
 247 static void help(void)
 248 {
 249         printf("\nflowtop %s, top-like netfilter TCP/UDP flow tracking\n",
 250                VERSION_STRING);
 251         puts("http://www.netsniff-ng.org\n\n"
 252              "Usage: flowtop [options]\n"
 253              "Options:\n"
 254              "  -4|--ipv4              Show only IPv4 flows (default)\n"
 255              "  -6|--ipv6              Show only IPv6 flows (default)\n"
 256              "  -T|--tcp               Show only TCP flows (default)\n"
 257              "  -U|--udp               Show only UDP flows\n"
 258              "  -D|--dccp              Show only DCCP flows\n"
 259              "  -I|--icmp              Show only ICMP/ICMPv6 flows\n"
 260              "  -S|--sctp              Show only SCTP flows\n"
 261              "  -s|--show-src          Also show source, not only dest\n"
 262              "  --city-db4 <path>      Specifiy path for geoip4 city database\n"
 263              "  --country-db4 <path>   Specifiy path for geoip4 country database\n"
 264              "  --city-db6 <path>      Specifiy path for geoip6 city database\n"
 265              "  --country-db6 <path>   Specifiy path for geoip6 country database\n"
 266              "  -v|--version           Print version\n"
 267              "  -h|--help              Print this help\n\n"
 268              "Examples:\n"
 269              "  flowtop\n"
 270              "  flowtop -46UTDISs\n\n"
 271              "Note:\n"
 272              "  If netfilter is not running, you can activate it with e.g.:\n"
 273              "   iptables -A INPUT -p tcp -m state --state ESTABLISHED -j ACCEPT\n"
 274              "   iptables -A OUTPUT -p tcp -m state --state NEW,ESTABLISHED -j ACCEPT\n\n"
 275              "Please report bugs to <bugs@netsniff-ng.org>\n"
 276              "Copyright (C) 2011-2012 Daniel Borkmann <daniel@netsniff-ng.org>\n"
 277              "Copyright (C) 2011-2012 Emmanuel Roullit <emmanuel@netsniff-ng.org>\n"
 278              "License: GNU GPL version 2.0\n"
 279              "This is free software: you are free to change and redistribute it.\n"
 280              "There is NO WARRANTY, to the extent permitted by law.\n");
 281         die();
 282 }
 283
 284 static void version(void)
 285 {
 286         printf("\nflowtop %s, top-like netfilter TCP/UDP flow tracking\n",
 287                VERSION_STRING);
 288         puts("http://www.netsniff-ng.org\n\n"
 289              "Please report bugs to <bugs@netsniff-ng.org>\n"
 290              "Copyright (C) 2011-2012 Daniel Borkmann <daniel@netsniff-ng.org>\n"
 291              "Copyright (C) 2011-2012 Emmanuel Roullit <emmanuel@netsniff-ng.org>\n"
 292              "License: GNU GPL version 2.0\n"
 293              "This is free software: you are free to change and redistribute it.\n"
 294              "There is NO WARRANTY, to the extent permitted by law.\n");
 295         die();
 296 }
 297
 298 static inline struct flow_entry *flow_entry_xalloc(void)
 299 {
 300         return xzmalloc(sizeof(struct flow_entry));
 301 }
 302
 303 static inline void flow_entry_xfree(struct flow_entry *n)
 304 {
 305         xfree(n);
 306 }
 307
 308 static inline void flow_list_init(struct flow_list *fl)
 309 {
 310         fl->head = NULL;
 311         spinlock_init(&fl->lock);
 312 }
 313
 314 static void flow_list_new_entry(struct flow_list *fl, struct nf_conntrack *ct)
 315 {
 316         struct flow_entry *n = flow_entry_xalloc();
 317
 318         flow_entry_from_ct(n, ct);
 319         flow_entry_get_extended(n);
 320
 321         rcu_assign_pointer(n->next, fl->head);
 322         rcu_assign_pointer(fl->head, n);
 323 }
 324
 325 static struct flow_entry *flow_list_find_id(struct flow_list *fl,
 326                                             uint32_t id)
 327 {
 328         struct flow_entry *n = rcu_dereference(fl->head);
 329
 330         while (n != NULL) {
 331                 if (n->flow_id == id)
 332                         return n;
 333
 334                 n = rcu_dereference(n->next);
 335         }
 336
 337         return NULL;
 338 }
 339
 340 static struct flow_entry *flow_list_find_prev_id(struct flow_list *fl,
 341                                                  uint32_t id)
 342 {
 343         struct flow_entry *n = rcu_dereference(fl->head), *tmp;
 344
 345         if (n->flow_id == id)
 346                 return NULL;
 347
 348         while ((tmp = rcu_dereference(n->next)) != NULL) {
 349                 if (tmp->flow_id == id)
 350                         return n;
 351
 352                 n = tmp;
 353         }
 354
 355         return NULL;
 356 }
 357
 358 static void flow_list_update_entry(struct flow_list *fl,
 359                                    struct nf_conntrack *ct)
 360 {
 361         int do_ext = 0;
 362         struct flow_entry *n;
 363
 364         n = flow_list_find_id(fl, nfct_get_attr_u32(ct, ATTR_ID));
 365         if (n == NULL) {
 366                 n = flow_entry_xalloc();
 367                 do_ext = 1;
 368         }
 369
 370         flow_entry_from_ct(n, ct);
 371         if (do_ext) {
 372                 flow_entry_get_extended(n);
 373
 374                 rcu_assign_pointer(n->next, fl->head);
 375                 rcu_assign_pointer(fl->head, n);
 376         }
 377 }
 378
 379 static void flow_list_destroy_entry(struct flow_list *fl,
 380                                     struct nf_conntrack *ct)
 381 {
 382         struct flow_entry *n1, *n2;
 383         uint32_t id = nfct_get_attr_u32(ct, ATTR_ID);
 384
 385         n1 = flow_list_find_id(fl, id);
 386         if (n1) {
 387                 n2 = flow_list_find_prev_id(fl, id);
 388                 if (n2) {
 389                         rcu_assign_pointer(n2->next, n1->next);
 390                         rcu_assign_pointer(n1->next, NULL);
 391
 392                         flow_entry_xfree(n1);
 393                 } else {
 394                         flow_entry_xfree(fl->head);
 395
 396                         rcu_assign_pointer(fl->head, NULL);
 397                 }
 398         }
 399 }
 400
 401 static void flow_list_destroy(struct flow_list *fl)
 402 {
 403         struct flow_entry *n;
 404
 405         while (fl->head != NULL) {
 406                 n = rcu_dereference(fl->head->next);
 407                 rcu_assign_pointer(fl->head->next, NULL);
 408
 409                 flow_entry_xfree(fl->head);
 410                 rcu_assign_pointer(fl->head, n);
 411         }
 412
 413         synchronize_rcu();
 414         spinlock_destroy(&fl->lock);
 415 }
 416
 417 static int walk_process(char *process, struct flow_entry *n)
 418 {
 419         int ret;
 420         DIR *dir;
 421         struct dirent *ent;
 422         char path[1024];
 423
 424         if (snprintf(path, sizeof(path), "/proc/%s/fd", process) == -1)
 425                 panic("giant process name! %s\n", process);
 426
 427         dir = opendir(path);
 428         if (!dir)
 429                 return 0;
 430
 431         while ((ent = readdir(dir))) {
 432                 struct stat statbuf;
 433
 434                 if (snprintf(path, sizeof(path), "/proc/%s/fd/%s",
 435                              process, ent->d_name) < 0)
 436                         continue;
 437
 438                 if (stat(path, &statbuf) < 0)
 439                         continue;
 440
 441                 if (S_ISSOCK(statbuf.st_mode) && n->inode == statbuf.st_ino) {
 442                         memset(n->cmdline, 0, sizeof(n->cmdline));
 443
 444                         snprintf(path, sizeof(path), "/proc/%s/exe", process);
 445
 446                         ret = readlink(path, n->cmdline,
 447                                        sizeof(n->cmdline) - 1);
 448                         if (ret < 0)
 449                                 panic("readlink error: %s\n", strerror(errno));
 450
 451                         n->procnum = atoi(process);
 452                         return 1;
 453                 }
 454         }
 455
 456         closedir(dir);
 457         return 0;
 458 }
 459
 460 static void walk_processes(struct flow_entry *n)
 461 {
 462         int ret;
 463         DIR *dir;
 464         struct dirent *ent;
 465
 466         /* n->inode must be set */
 467         if (n->inode <= 0) {
 468                 memset(n->cmdline, 0, sizeof(n->cmdline));
 469                 return;
 470         }
 471
 472         dir = opendir("/proc");
 473         if (!dir)
 474                 panic("Cannot open /proc!\n");
 475
 476         while ((ent = readdir(dir))) {
 477                 if (strspn(ent->d_name, "0123456789") == strlen(ent->d_name)) {
 478                         ret = walk_process(ent->d_name, n);
 479                         if (ret > 0)
 480                                 break;
 481                 }
 482         }
 483
 484         closedir(dir);
 485 }
 486
 487 static int get_port_inode(uint16_t port, int proto, int is_ip6)
 488 {
 489         int ret = -ENOENT;
 490         char path[128], buff[1024];
 491         FILE *proc;
 492
 493         memset(path, 0, sizeof(path));
 494         snprintf(path, sizeof(path), "/proc/net/%s%s",
 495                  l4proto2str[proto], is_ip6 ? "6" : "");
 496
 497         proc = fopen(path, "r");
 498         if (!proc)
 499                 return -EIO;
 500
 501         memset(buff, 0, sizeof(buff));
 502
 503         while (fgets(buff, sizeof(buff), proc) != NULL) {
 504                 int inode = 0;
 505                 unsigned int lport = 0;
 506
 507                 buff[sizeof(buff) - 1] = 0;
 508                 if (sscanf(buff, "%*u: %*X:%X %*X:%*X %*X %*X:%*X %*X:%*X "
 509                            "%*X %*u %*u %u", &lport, &inode) == 2) {
 510                         if ((uint16_t) lport == port) {
 511                                 ret = inode;
 512                                 break;
 513                         }
 514                 }
 515
 516                 memset(buff, 0, sizeof(buff));
 517         }
 518
 519         fclose(proc);
 520         return ret;
 521 }
 522
 523 #define CP_NFCT(elem, attr, x)                          \
 524         do { n->elem = nfct_get_attr_u##x(ct,(attr)); } while (0)
 525 #define CP_NFCT_BUFF(elem, attr) do {                   \
 526         const uint8_t *buff = nfct_get_attr(ct,(attr)); \
 527         if (buff != NULL)                               \
 528                 memcpy(n->elem, buff, sizeof(n->elem)); \
 529 } while (0)
 530
 531 static void flow_entry_from_ct(struct flow_entry *n, struct nf_conntrack *ct)
 532 {
 533         CP_NFCT(l3_proto, ATTR_ORIG_L3PROTO, 8);
 534         CP_NFCT(l4_proto, ATTR_ORIG_L4PROTO, 8);
 535
 536         CP_NFCT(ip4_src_addr, ATTR_ORIG_IPV4_SRC, 32);
 537         CP_NFCT(ip4_dst_addr, ATTR_ORIG_IPV4_DST, 32);
 538
 539         CP_NFCT(port_src, ATTR_ORIG_PORT_SRC, 16);
 540         CP_NFCT(port_dst, ATTR_ORIG_PORT_DST, 16);
 541
 542         CP_NFCT(status, ATTR_STATUS, 32);
 543
 544         CP_NFCT(tcp_state, ATTR_TCP_STATE, 8);
 545         CP_NFCT(tcp_flags, ATTR_TCP_FLAGS_ORIG, 8);
 546         CP_NFCT(sctp_state, ATTR_SCTP_STATE, 8);
 547         CP_NFCT(dccp_state, ATTR_DCCP_STATE, 8);
 548
 549         CP_NFCT(counter_pkts, ATTR_ORIG_COUNTER_PACKETS, 64);
 550         CP_NFCT(counter_bytes, ATTR_ORIG_COUNTER_BYTES, 64);
 551
 552         CP_NFCT(timestamp_start, ATTR_TIMESTAMP_START, 64);
 553         CP_NFCT(timestamp_stop, ATTR_TIMESTAMP_STOP, 64);
 554
 555         CP_NFCT(flow_id, ATTR_ID, 32);
 556         CP_NFCT(use, ATTR_USE, 32);
 557
 558         CP_NFCT_BUFF(ip6_src_addr, ATTR_ORIG_IPV6_SRC);
 559         CP_NFCT_BUFF(ip6_dst_addr, ATTR_ORIG_IPV6_DST);
 560
 561         n->port_src = ntohs(n->port_src);
 562         n->port_dst = ntohs(n->port_dst);
 563
 564         n->ip4_src_addr = ntohl(n->ip4_src_addr);
 565         n->ip4_dst_addr = ntohl(n->ip4_dst_addr);
 566 }
 567
 568 enum flow_entry_direction {
 569         flow_entry_src,
 570         flow_entry_dst,
 571 };
 572
 573 static inline int flow_entry_get_extended_is_dns(struct flow_entry *n)
 574 {
 575         /* We don't want to analyze / display DNS itself, since we
 576          * use it to resolve reverse dns.
 577          */
 578         return n->port_src == 53 || n->port_dst == 53;
 579 }
 580
 581 #define SELFLD(dir,src_member,dst_member)       \
 582         (((dir) == flow_entry_src) ? n->src_member : n->dst_member)
 583
 584 static struct sockaddr_in *
 585 flow_entry_get_sain4_obj(struct flow_entry *n, enum flow_entry_direction dir,
 586                          struct sockaddr_in *sa)
 587 {
 588         memset(sa, 0, sizeof(*sa));
 589         sa->sin_family = PF_INET;
 590         sa->sin_addr.s_addr = htonl(SELFLD(dir, ip4_src_addr, ip4_dst_addr));
 591
 592         return sa;
 593 }
 594
 595 static struct sockaddr_in6 *
 596 flow_entry_get_sain6_obj(struct flow_entry *n, enum flow_entry_direction dir,
 597                          struct sockaddr_in6 *sa)
 598 {
 599         memset(sa, 0, sizeof(*sa));
 600         sa->sin6_family = PF_INET6;
 601
 602         memcpy(&sa->sin6_addr, SELFLD(dir, ip6_src_addr, ip6_dst_addr),
 603                sizeof(SELFLD(dir, ip6_src_addr, ip6_dst_addr)));
 604
 605         return sa;
 606 }
 607
 608 static void
 609 flow_entry_geo_city_lookup_generic(struct flow_entry *n,
 610                                    enum flow_entry_direction dir)
 611 {
 612         GeoIPRecord *gir = NULL;
 613         struct sockaddr_in sa4;
 614         struct sockaddr_in6 sa6;
 615         const char *city = NULL;
 616
 617         switch (n->l3_proto) {
 618         default:
 619                 bug();
 620
 621         case AF_INET:
 622                 flow_entry_get_sain4_obj(n, dir, &sa4);
 623                 gir = GeoIP_record_by_ipnum(geo_city.gi4,
 624                                             ntohl(sa4.sin_addr.s_addr));
 625                 break;
 626
 627         case AF_INET6:
 628                 flow_entry_get_sain6_obj(n, dir, &sa6);
 629                 gir = GeoIP_record_by_ipnum_v6(geo_city.gi6, sa6.sin6_addr);
 630                 break;
 631         }
 632
 633         if (gir != NULL)
 634                 city = gir->city;
 635
 636         bug_on(sizeof(n->city_src) != sizeof(n->city_dst));
 637
 638         if (city) {
 639                 memcpy(SELFLD(dir, city_src, city_dst), city,
 640                        min(sizeof(n->city_src), strlen(city)));
 641         } else {
 642                 memset(SELFLD(dir, city_src, city_dst), 0,
 643                        sizeof(n->city_src));
 644         }
 645 }
 646
 647 static void
 648 flow_entry_geo_country_lookup_generic(struct flow_entry *n,
 649                                       enum flow_entry_direction dir)
 650 {
 651         struct sockaddr_in sa4;
 652         struct sockaddr_in6 sa6;
 653         inline const char *make_na(const char *p) { return p ? : "N/A"; }
 654         const char *country = NULL;
 655
 656         switch (n->l3_proto) {
 657         default:
 658                 bug();
 659
 660         case AF_INET:
 661                 flow_entry_get_sain4_obj(n, dir, &sa4);
 662                 country = GeoIP_country_name_by_ipnum(geo_country.gi4,
 663                                                 ntohl(sa4.sin_addr.s_addr));
 664                 break;
 665
 666         case AF_INET6:
 667                 flow_entry_get_sain6_obj(n, dir, &sa6);
 668                 country = GeoIP_country_name_by_ipnum_v6(geo_country.gi6,
 669                                                          sa6.sin6_addr);
 670                 break;
 671         }
 672
 673         country = make_na(country);
 674
 675         bug_on(sizeof(n->country_src) != sizeof(n->country_dst));
 676         memcpy(SELFLD(dir, country_src, country_dst), country,
 677                min(sizeof(n->country_src), strlen(country)));
 678 }
 679
 680 static void flow_entry_get_extended_geo(struct flow_entry *n,
 681                                         enum flow_entry_direction dir)
 682 {
 683         flow_entry_geo_city_lookup_generic(n, dir);
 684         flow_entry_geo_country_lookup_generic(n, dir);
 685 }
 686
 687 static void flow_entry_get_extended_revdns(struct flow_entry *n,
 688                                            enum flow_entry_direction dir)
 689 {
 690         size_t sa_len;
 691         struct sockaddr_in sa4;
 692         struct sockaddr_in6 sa6;
 693         struct sockaddr *sa;
 694         struct hostent *hent;
 695
 696         switch (n->l3_proto) {
 697         default:
 698                 bug();
 699
 700         case AF_INET:
 701                 flow_entry_get_sain4_obj(n, dir, &sa4);
 702                 sa = (struct sockaddr *) &sa4;
 703                 sa_len = sizeof(sa4);
 704                 hent = gethostbyaddr(&sa4.sin_addr, sizeof(sa4.sin_addr),
 705                                      AF_INET);
 706                 break;
 707
 708         case AF_INET6:
 709                 flow_entry_get_sain6_obj(n, dir, &sa6);
 710                 sa = (struct sockaddr *) &sa6;
 711                 sa_len = sizeof(sa6);
 712                 hent = gethostbyaddr(&sa6.sin6_addr, sizeof(sa6.sin6_addr),
 713                                      AF_INET6);
 714                 break;
 715         }
 716
 717         bug_on(sizeof(n->rev_dns_src) != sizeof(n->rev_dns_dst));
 718         getnameinfo(sa, sa_len, SELFLD(dir, rev_dns_src, rev_dns_dst),
 719                     sizeof(n->rev_dns_src), NULL, 0, NI_NUMERICHOST);
 720
 721         if (hent) {
 722                 memset(n->rev_dns_dst, 0, sizeof(n->rev_dns_dst));
 723                 memcpy(SELFLD(dir, rev_dns_src, rev_dns_dst),
 724                        hent->h_name, min(sizeof(n->rev_dns_src),
 725                                          strlen(hent->h_name)));
 726         }
 727 }
 728
 729 static void flow_entry_get_extended(struct flow_entry *n)
 730 {
 731         if (n->flow_id == 0 || flow_entry_get_extended_is_dns(n))
 732                 return;
 733
 734         flow_entry_get_extended_revdns(n, flow_entry_src);
 735         flow_entry_get_extended_geo(n, flow_entry_src);
 736
 737         flow_entry_get_extended_revdns(n, flow_entry_dst);
 738         flow_entry_get_extended_geo(n, flow_entry_dst);
 739
 740         /* Lookup application */
 741         n->inode = get_port_inode(n->port_src, n->l4_proto,
 742                                   n->l3_proto == AF_INET6);
 743         if (n->inode > 0)
 744                 walk_processes(n);
 745 }
 746
 747 static uint16_t presenter_get_port(uint16_t src, uint16_t dst, int tcp)
 748 {
 749         if (src < dst && src < 1024) {
 750                 return src;
 751         } else if (dst < src && dst < 1024) {
 752                 return dst;
 753         } else {
 754                 const char *tmp1, *tmp2;
 755                 if (tcp) {
 756                         tmp1 = lookup_port_tcp(src);
 757                         tmp2 = lookup_port_tcp(dst);
 758                 } else {
 759                         tmp1 = lookup_port_udp(src);
 760                         tmp2 = lookup_port_udp(dst);
 761                 }
 762                 if (tmp1 && !tmp2) {
 763                         return src;
 764                 } else if (!tmp1 && tmp2) {
 765                         return dst;
 766                 } else {
 767                         if (src < dst)
 768                                 return src;
 769                         else
 770                                 return dst;
 771                 }
 772         }
 773 }
 774
 775 static void presenter_screen_init(WINDOW **screen)
 776 {
 777         (*screen) = initscr();
 778         noecho();
 779         cbreak();
 780         keypad(stdscr, TRUE);
 781         nodelay(*screen, TRUE);
 782         refresh();
 783         wrefresh(*screen);
 784 }
 785
 786 static void presenter_screen_do_line(WINDOW *screen, struct flow_entry *n,
 787                                      unsigned int *line)
 788 {
 789         char tmp[128], *pname = NULL;
 790         uint16_t port;
 791
 792         mvwprintw(screen, *line, 2, "");
 793
 794         /* PID, application name */
 795         if (n->procnum > 0) {
 796                 slprintf(tmp, sizeof(tmp), "%s(%u)", basename(n->cmdline),
 797                          n->procnum);
 798
 799                 printw("[");
 800                 attron(COLOR_PAIR(3));
 801                 printw("%s", tmp);
 802                 attroff(COLOR_PAIR(3));
 803                 printw("]:");
 804         }
 805
 806         /* L3 protocol, L4 protocol, states */
 807         printw("%s:%s", l3proto2str[n->l3_proto], l4proto2str[n->l4_proto]);
 808         printw("[");
 809         attron(COLOR_PAIR(3));
 810         switch (n->l4_proto) {
 811         case IPPROTO_TCP:
 812                 printw("%s", tcp_state2str[n->tcp_state]);
 813                 break;
 814         case IPPROTO_SCTP:
 815                 printw("%s", sctp_state2str[n->sctp_state]);
 816                 break;
 817         case IPPROTO_DCCP:
 818                 printw("%s", dccp_state2str[n->dccp_state]);
 819                 break;
 820         case IPPROTO_UDP:
 821         case IPPROTO_UDPLITE:
 822         case IPPROTO_ICMP:
 823         case IPPROTO_ICMPV6:
 824                 printw("NOSTATE");
 825                 break;
 826         }
 827         attroff(COLOR_PAIR(3));
 828         printw("]");
 829
 830         /* Guess application port */
 831         switch (n->l4_proto) {
 832         case IPPROTO_TCP:
 833                 port = presenter_get_port(n->port_src, n->port_dst, 1);
 834                 pname = lookup_port_tcp(port);
 835                 break;
 836         case IPPROTO_UDP:
 837         case IPPROTO_UDPLITE:
 838                 port = presenter_get_port(n->port_src, n->port_dst, 0);
 839                 pname = lookup_port_udp(port);
 840                 break;
 841         }
 842         if (pname) {
 843                 attron(A_BOLD);
 844                 printw(":%s", pname);
 845                 attroff(A_BOLD);
 846         }
 847         printw(" ->");
 848
 849         /* Number packets, bytes */
 850         if (n->counter_pkts > 0 && n->counter_bytes > 0)
 851                 printw(" (%llu pkts, %llu bytes) ->",
 852                        n->counter_pkts, n->counter_bytes);
 853
 854         /* Show source information: reverse DNS, port, country, city */
 855         if (show_src) {
 856                 attron(COLOR_PAIR(1));
 857                 mvwprintw(screen, ++(*line), 8, "src: %s", n->rev_dns_src);
 858                 attroff(COLOR_PAIR(1));
 859
 860                 printw(":%u (", n->port_src);
 861
 862                 attron(COLOR_PAIR(4));
 863                 printw("%s", n->country_src);
 864                 attroff(COLOR_PAIR(4));
 865
 866                 if (n->city_src[0])
 867                         printw(", %s", n->city_src);
 868                 printw(") => ");
 869         }
 870
 871         /* Show dest information: reverse DNS, port, country, city */
 872         attron(COLOR_PAIR(2));
 873         mvwprintw(screen, ++(*line), 8, "dst: %s", n->rev_dns_dst);
 874         attroff(COLOR_PAIR(2));
 875
 876         printw(":%u (", n->port_dst);
 877
 878         attron(COLOR_PAIR(4));
 879         printw("%s", n->country_dst);
 880         attroff(COLOR_PAIR(4));
 881
 882         if (n->city_dst[0])
 883                 printw(", %s", n->city_dst);
 884         printw(")");
 885 }
 886
 887 static inline int presenter_flow_wrong_state(struct flow_entry *n, int state)
 888 {
 889         int ret = 1;
 890
 891         switch (n->l4_proto) {
 892         case IPPROTO_TCP:
 893                 if (n->tcp_state == state)
 894                         ret = 0;
 895                 break;
 896         case IPPROTO_SCTP:
 897                 if (n->sctp_state == state)
 898                         ret = 0;
 899                 break;
 900         case IPPROTO_DCCP:
 901                 if (n->dccp_state == state)
 902                         ret = 0;
 903                 break;
 904         case IPPROTO_UDP:
 905         case IPPROTO_UDPLITE:
 906         case IPPROTO_ICMP:
 907         case IPPROTO_ICMPV6:
 908                 ret = 0;
 909                 break;
 910         }
 911
 912         return ret;
 913 }
 914
 915 static void presenter_screen_update(WINDOW *screen, struct flow_list *fl,
 916                                     int skip_lines)
 917 {
 918         int i, j, maxy;
 919         unsigned int line = 3;
 920         struct flow_entry *n;
 921         uint8_t protocols[] = {
 922                 IPPROTO_TCP,
 923                 IPPROTO_DCCP,
 924                 IPPROTO_SCTP,
 925                 IPPROTO_UDP,
 926                 IPPROTO_UDPLITE,
 927                 IPPROTO_ICMP,
 928                 IPPROTO_ICMPV6,
 929         };
 930         size_t protocol_state_size[] = {
 931                 [IPPROTO_TCP] = array_size(tcp_states),
 932                 [IPPROTO_DCCP] = array_size(dccp_states),
 933                 [IPPROTO_SCTP] = array_size(sctp_states),
 934                 [IPPROTO_UDP] = 1,
 935                 [IPPROTO_UDPLITE] = 1,
 936                 [IPPROTO_ICMP] = 1,
 937                 [IPPROTO_ICMPV6] = 1,
 938         };
 939
 940         curs_set(0);
 941
 942         maxy = getmaxy(screen);
 943         maxy -= 6;
 944
 945         start_color();
 946         init_pair(1, COLOR_RED, COLOR_BLACK);
 947         init_pair(2, COLOR_BLUE, COLOR_BLACK);
 948         init_pair(3, COLOR_YELLOW, COLOR_BLACK);
 949         init_pair(4, COLOR_GREEN, COLOR_BLACK);
 950
 951         wclear(screen);
 952         clear();
 953
 954         mvwprintw(screen, 1, 2, "Kernel netfilter TCP/UDP "
 955                   "flow statistics, [+%d]", skip_lines);
 956
 957         rcu_read_lock();
 958
 959         if (rcu_dereference(fl->head) == NULL)
 960                 mvwprintw(screen, line, 2, "(No active sessions! "
 961                           "Is netfilter running?)");
 962
 963         for (i = 0; i < array_size(protocols); i++) {
 964                 for (j = 0; j < protocol_state_size[protocols[i]]; j++) {
 965                         n = rcu_dereference(fl->head);
 966                         while (n && maxy > 0) {
 967                                 int skip_entry = 0;
 968
 969                                 if (n->l4_proto != protocols[i])
 970                                         skip_entry = 1;
 971                                 if (presenter_flow_wrong_state(n, j))
 972                                         skip_entry = 1;
 973                                 if (presenter_get_port(n->port_src,
 974                                                        n->port_dst, 0) == 53)
 975                                         skip_entry = 1;
 976                                 if (skip_entry) {
 977                                         n = rcu_dereference(n->next);
 978                                         continue;
 979                                 }
 980                                 if (skip_lines > 0) {
 981                                         n = rcu_dereference(n->next);
 982                                         skip_lines--;
 983                                         continue;
 984                                 }
 985
 986                                 presenter_screen_do_line(screen, n, &line);
 987
 988                                 line++;
 989                                 maxy -= (2 + 1 * show_src);
 990                                 n = rcu_dereference(n->next);
 991                         }
 992                 }
 993         }
 994
 995         rcu_read_unlock();
 996
 997         wrefresh(screen);
 998         refresh();
 999 }
1000
1001 static inline void presenter_screen_end(void)
1002 {
1003         endwin();
1004 }
1005
1006 static void presenter(void)
1007 {
1008         int skip_lines = 0;
1009         WINDOW *screen = NULL;
1010
1011         dissector_init_ethernet(0);
1012         presenter_screen_init(&screen);
1013
1014         rcu_register_thread();
1015         while (!sigint) {
1016                 switch (getch()) {
1017                 case 'q':
1018                         sigint = 1;
1019                         break;
1020                 case KEY_UP:
1021                 case 'u':
1022                 case 'k':
1023                         skip_lines--;
1024                         if (skip_lines < 0)
1025                                 skip_lines = 0;
1026                         break;
1027                 case KEY_DOWN:
1028                 case 'd':
1029                 case 'j':
1030                         skip_lines++;
1031                         if (skip_lines > SCROLL_MAX)
1032                                 skip_lines = SCROLL_MAX;
1033                         break;
1034                 default:
1035                         fflush(stdin);
1036                         break;
1037                 }
1038
1039                 presenter_screen_update(screen, &flow_list, skip_lines);
1040                 usleep(100000);
1041         }
1042         rcu_unregister_thread();
1043
1044         presenter_screen_end();
1045         dissector_cleanup_ethernet();
1046 }
1047
1048 static int collector_cb(enum nf_conntrack_msg_type type,
1049                         struct nf_conntrack *ct, void *data)
1050 {
1051         if (sigint)
1052                 return NFCT_CB_STOP;
1053
1054         synchronize_rcu();
1055         spinlock_lock(&flow_list.lock);
1056
1057         switch (type) {
1058         case NFCT_T_NEW:
1059                 flow_list_new_entry(&flow_list, ct);
1060                 break;
1061         case NFCT_T_UPDATE:
1062                 flow_list_update_entry(&flow_list, ct);
1063                 break;
1064         case NFCT_T_DESTROY:
1065                 flow_list_destroy_entry(&flow_list, ct);
1066                 break;
1067         default:
1068                 break;
1069         }
1070
1071         spinlock_unlock(&flow_list.lock);
1072
1073         return NFCT_CB_CONTINUE;
1074 }
1075
1076 static inline GeoIP *collector_geoip_open(const char *path, int type)
1077 {
1078         if (path != NULL)
1079                 return GeoIP_open(path, GEOIP_MMAP_CACHE);
1080         else
1081                 return GeoIP_open_type(type, GEOIP_MMAP_CACHE);
1082 }
1083
1084 static void collector_load_geoip(void)
1085 {
1086         geo_country.gi4 = collector_geoip_open(geo_country.path4,
1087                                                GEOIP_COUNTRY_EDITION);
1088         if (geo_country.gi4 == NULL)
1089                 panic("Cannot open GeoIP4 country database!\n");
1090
1091         geo_country.gi6 = collector_geoip_open(geo_country.path6,
1092                                                GEOIP_COUNTRY_EDITION_V6);
1093         if (geo_country.gi6 == NULL)
1094                 panic("Cannot open GeoIP6 country database!\n");
1095
1096         geo_city.gi4 = collector_geoip_open(geo_city.path4,
1097                                             GEOIP_CITY_EDITION_REV1);
1098         if (geo_city.gi4 == NULL)
1099                 panic("Cannot open GeoIP4 city database!\n");
1100
1101         geo_city.gi6 = collector_geoip_open(geo_city.path6,
1102                                             GEOIP_CITY_EDITION_REV1_V6);
1103         if (geo_city.gi6 == NULL)
1104                 panic("Cannot open GeoIP6 city database!\n");
1105
1106         GeoIP_set_charset(geo_country.gi4, GEOIP_CHARSET_UTF8);
1107         GeoIP_set_charset(geo_country.gi6, GEOIP_CHARSET_UTF8);
1108
1109         GeoIP_set_charset(geo_city.gi4, GEOIP_CHARSET_UTF8);
1110         GeoIP_set_charset(geo_city.gi6, GEOIP_CHARSET_UTF8);
1111 }
1112
1113 static void collector_destroy_geoip(void)
1114 {
1115         GeoIP_delete(geo_country.gi4);
1116         GeoIP_delete(geo_country.gi6);
1117
1118         GeoIP_delete(geo_city.gi4);
1119         GeoIP_delete(geo_city.gi6);
1120 }
1121
1122 static inline void collector_flush(struct nfct_handle *handle, uint8_t family)
1123 {
1124         nfct_query(handle, NFCT_Q_FLUSH, &family);
1125 }
1126
1127 static void *collector(void *null)
1128 {
1129         int ret;
1130         struct nfct_handle *handle;
1131         struct nfct_filter *filter;
1132
1133         handle = nfct_open(CONNTRACK, NF_NETLINK_CONNTRACK_NEW |
1134                                       NF_NETLINK_CONNTRACK_UPDATE |
1135                                       NF_NETLINK_CONNTRACK_DESTROY);
1136         if (!handle)
1137                 panic("Cannot create a nfct handle!\n");
1138
1139         collector_flush(handle, AF_INET);
1140         collector_flush(handle, AF_INET6);
1141
1142         filter = nfct_filter_create();
1143         if (!filter)
1144                 panic("Cannot create a nfct filter!\n");
1145
1146         ret = nfct_filter_attach(nfct_fd(handle), filter);
1147         if (ret < 0)
1148                 panic("Cannot attach filter to handle!\n");
1149
1150         if (what & INCLUDE_UDP) {
1151                 nfct_filter_add_attr_u32(filter, NFCT_FILTER_L4PROTO, IPPROTO_UDP);
1152                 nfct_filter_add_attr_u32(filter, NFCT_FILTER_L4PROTO, IPPROTO_UDPLITE);
1153         }
1154         if (what & INCLUDE_TCP)
1155                 nfct_filter_add_attr_u32(filter, NFCT_FILTER_L4PROTO, IPPROTO_TCP);
1156         if (what & INCLUDE_DCCP)
1157                 nfct_filter_add_attr_u32(filter, NFCT_FILTER_L4PROTO, IPPROTO_DCCP);
1158         if (what & INCLUDE_SCTP)
1159                 nfct_filter_add_attr_u32(filter, NFCT_FILTER_L4PROTO, IPPROTO_SCTP);
1160         if (what & INCLUDE_ICMP && what & INCLUDE_IPV4)
1161                 nfct_filter_add_attr_u32(filter, NFCT_FILTER_L4PROTO, IPPROTO_ICMP);
1162         if (what & INCLUDE_ICMP && what & INCLUDE_IPV6)
1163                 nfct_filter_add_attr_u32(filter, NFCT_FILTER_L4PROTO, IPPROTO_ICMPV6);
1164         if (what & INCLUDE_IPV4) {
1165                 nfct_filter_set_logic(filter, NFCT_FILTER_SRC_IPV4,
1166                                       NFCT_FILTER_LOGIC_NEGATIVE);
1167                 nfct_filter_add_attr(filter, NFCT_FILTER_SRC_IPV4, &filter_ipv4);
1168         }
1169         if (what & INCLUDE_IPV6) {
1170                 nfct_filter_set_logic(filter, NFCT_FILTER_SRC_IPV6,
1171                                       NFCT_FILTER_LOGIC_NEGATIVE);
1172                 nfct_filter_add_attr(filter, NFCT_FILTER_SRC_IPV6, &filter_ipv6);
1173         }
1174
1175         ret = nfct_filter_attach(nfct_fd(handle), filter);
1176         if (ret < 0)
1177                 panic("Cannot attach filter to handle!\n");
1178
1179         nfct_callback_register(handle, NFCT_T_ALL, collector_cb, NULL);
1180
1181         nfct_filter_destroy(filter);
1182
1183         collector_load_geoip();
1184
1185         flow_list_init(&flow_list);
1186
1187         rcu_register_thread();
1188
1189         while (!sigint && ret >= 0)
1190                 ret = nfct_catch(handle);
1191
1192         rcu_unregister_thread();
1193
1194         flow_list_destroy(&flow_list);
1195
1196         collector_destroy_geoip();
1197
1198         nfct_close(handle);
1199
1200         pthread_exit(0);
1201 }
1202
1203 int main(int argc, char **argv)
1204 {
1205         pthread_t tid;
1206         int ret, c, opt_index, what_cmd = 0;
1207
1208         memset(&geo_country, 0, sizeof(geo_country));
1209         memset(&geo_city, 0, sizeof(geo_city));
1210
1211         while ((c = getopt_long(argc, argv, short_options, long_options,
1212                &opt_index)) != EOF) {
1213                 switch (c) {
1214                 case '4':
1215                         what_cmd |= INCLUDE_IPV4;
1216                         break;
1217                 case '6':
1218                         what_cmd |= INCLUDE_IPV6;
1219                         break;
1220                 case 'T':
1221                         what_cmd |= INCLUDE_TCP;
1222                         break;
1223                 case 'U':
1224                         what_cmd |= INCLUDE_UDP;
1225                         break;
1226                 case 'D':
1227                         what_cmd |= INCLUDE_DCCP;
1228                         break;
1229                 case 'I':
1230                         what_cmd |= INCLUDE_ICMP;
1231                         break;
1232                 case 'S':
1233                         what_cmd |= INCLUDE_SCTP;
1234                         break;
1235                 case 's':
1236                         show_src = 1;
1237                         break;
1238                 case 'L':
1239                         geo_city.path4 = xstrdup(optarg);
1240                         break;
1241                 case 'K':
1242                         geo_country.path4 = xstrdup(optarg);
1243                         break;
1244                 case 'O':
1245                         geo_city.path6 = xstrdup(optarg);
1246                         break;
1247                 case 'P':
1248                         geo_country.path6 = xstrdup(optarg);
1249                         break;
1250                 case 'h':
1251                         help();
1252                         break;
1253                 case 'v':
1254                         version();
1255                         break;
1256                 case '?':
1257                         switch (optopt) {
1258                         case 'L':
1259                         case 'K':
1260                         case 'O':
1261                         case 'P':
1262                                 panic("Option -%c requires an argument!\n",
1263                                       optopt);
1264                         default:
1265                                 if (isprint(optopt))
1266                                         whine("Unknown option character "
1267                                               "`0x%X\'!\n", optopt);
1268                                 die();
1269                         }
1270                 default:
1271                         break;
1272                 }
1273         }
1274
1275         if (what_cmd > 0)
1276                 what = what_cmd;
1277
1278         rcu_init();
1279
1280         register_signal(SIGINT, signal_handler);
1281         register_signal(SIGHUP, signal_handler);
1282
1283         ret = pthread_create(&tid, NULL, collector, NULL);
1284         if (ret < 0)
1285                 panic("Cannot create phthread!\n");
1286
1287         presenter();
1288
1289         free(geo_country.path4);
1290         free(geo_country.path6);
1291
1292         free(geo_city.path4);
1293         free(geo_city.path6);
1294
1295         return 0;
1296 }