staging/mz.h

   1 /*
   2  * Mausezahn - A fast versatile traffic generator
   3  * Copyright (C) 2008-2010 Herbert Haas
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under
   6  * the terms of the GNU General Public License version 2 as published by the
   7  * Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  11  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
  12  * details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, see http://www.gnu.org/licenses/gpl-2.0.html
  16  *
  17 */
  18
  19
  20
  21 #ifndef __MAUSEZAHN__
  22 #define __MAUSEZAHN__
  23
  24 #define _GNU_SOURCE
  25 #include <libnet.h>
  26 #include <pcap/pcap.h>
  27 #include <stdio.h>
  28 #include <unistd.h>
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <errno.h>
  32 #include <limits.h>
  33 #include <sys/time.h>
  34 #include <time.h>
  35 #include <signal.h>
  36 #include <sys/types.h>
  37 #include <sys/socket.h>
  38 #include <arpa/inet.h>
  39 #include <sys/ioctl.h>
  40 #include <netinet/in.h>
  41 #include <stdarg.h>
  42 #include <math.h>
  43
  44 extern int verbose_level;
  45
  46 static inline void verbose_l1(const char *format, ...)
  47 {
  48         va_list vl;
  49
  50         if (verbose_level < 1)
  51                 return;
  52
  53         va_start(vl, format);
  54         vfprintf(stderr, format, vl);
  55         va_end(vl);
  56 }
  57
  58 static inline void verbose_l2(const char *format, ...)
  59 {
  60         va_list vl;
  61
  62         if (verbose_level < 2)
  63                 return;
  64
  65         va_start(vl, format);
  66         vfprintf(stderr, format, vl);
  67         va_end(vl);
  68 }
  69
  70 ////////////////////////////////////////////////////////////////////////////////////////////////////////////
  71 //
  72 //
  73 #define MAUSEZAHN_VERSION "Mausezahn 0.40 - (C) 2007-2010 by Herbert Haas - http://www.perihel.at/sec/mz/"
  74 #define MAUSEZAHN_VERSION_SHORT "0.40"
  75 //
  76 //
  77 ////////////////////////////////////////////////////////////////////////////////////////////////////////////
  78
  79
  80 // "Dies ist ein schrecklicher Ort."
  81
  82 #define MZ_DEFAULT_CONFIG_PATH "/etc/netsniff-ng/"   // see also mz_default_config_path below
  83 #define MZ_DEFAULT_LOG_PATH "/var/log/mausezahn/"  // see also mz_default_log_path below
  84
  85 #define SLEEP usleep               // The sleep function to use. Consider 'nanosleep' in future.
  86 #define DEFAULT_DELAY 0
  87 #define PCAP_READ_TIMEOUT_MSEC 1   // The read timeout for pcap_open_live()
  88 #define MZ_MAX_DEVICES 10          // Max number of network devices supported
  89 #define MAX_PAYLOAD_SIZE 3*8192
  90 #define MAX_DNS_NAME 256
  91 #define MAX_8021Q_TAGS 16
  92 #define TIME_COUNT_MAX 10000       // the size of the timestamp arrays timeRX and timeTX upon creation
  93 #define TIME_COUNT 100             // the default used-size of the timestamp arrays timeRX and timeTX
  94 #define MAX_DATA_BLOCKS 1000       // how many data blocks of size TIME_COUNT-1 should be written per file
  95 #define MAXBYTES_TO_READ 1500      // how many bytes the pcap routine should read from net
  96 #define RCV_RTP_MAX_BAR_WIDTH 500  // max line-width printed in BAR mode (see rcv_rtp.c)
  97
  98 #define ETH_SRC 1   // These are only some symbols used by some functions. (Don't touch)
  99 #define ETH_DST 2   // These are only some symbols used by some functions.
 100 #define SRC_PORT 1  // These are only some symbols used by some functions.
 101 #define DST_PORT 2  // These are only some symbols used by some functions.
 102
 103 #define TEST fprintf(stderr, "HERE at line %i in file %s\n", __LINE__,__FILE__ ); fflush(stderr);
 104
 105
 106 // -----  PCAP-specific definitions: ---------------------
 107 #define IPADDRSIZE 46
 108
 109
 110 int MZ_SIZE_LONG_INT;
 111
 112 char mz_default_config_path[256];
 113 char mz_default_log_path[256];
 114
 115
 116 struct arp_table_struct {
 117         int               index;     // an entry index (1, 2, ...) for easier user access
 118         u_int8_t          sa[6];     // sent by this MAC SA
 119         u_int8_t          smac[6];   // announced MAC
 120         u_int8_t          smac_prev[6];   // previously announced MAC
 121         u_int8_t          sip[4];    // announced IP
 122         unsigned long int uni_rq;    // count unidirectional ARP requests for this IP
 123         unsigned long int bc_resp;   // count broadcast ARP responses for this IP
 124         unsigned long int uni_resp;  // count normal (unidir) ARP responses for this IP
 125         unsigned long int changed;   // count how often the MAC address has changed!
 126         int               locked;    // 1=this entry cannot be overidden anymore
 127         int               dynamic;   // 1=learned dynamically, 0=configured by user
 128         int               flags;     // anomaly information (length anomaly: bit 0, sa!=smac: bit 1 , ...)
 129         int               gw;        // 1=Default GW
 130         char              when[10];  // human readable timestamp (e. g. "11:42:53")
 131         u_int32_t sec, nsec;         // timestamp of last ARP response
 132         u_int32_t sec_prev, nsec_prev;         // timestamp of previous ARP response
 133         //-----------------//
 134         struct arp_table_struct *next;
 135 };
 136
 137 // Device list
 138 struct device_struct
 139 {
 140         char       dev[16];               // Device name
 141         int        index;                 // Device index (assigned by OS)
 142         int        phy;                   // 1 if physical, 0 if not (e. g. loopback)
 143         int        mtu;
 144         int        cli;                   // if set to 1 then the CLI connection must terminate here
 145         int        mgmt_only;             // if set to 1 then no data traffic is allowed through that interface
 146         // ---- MAC addresses ----
 147         u_int8_t   mac[6];                // Real MAC address
 148         u_int8_t   mac_mops[6];           // MAC address to be used
 149         // ---- IP related -----
 150         char       ip_str[IPADDRSIZE+1];  // Real IP address as string in dotted decimal notation
 151         u_int8_t   ip[4];                 // Real IP address
 152         u_int8_t   net[4];                // Real network
 153         u_int8_t   mask[4];               // Real mask
 154         u_int8_t   ip_mops[4];            // IP address to be used
 155         // ---- Default Gateway per interface:
 156         u_int8_t   mac_gw[6];             // MAC address of default gateway
 157         u_int8_t   ip_gw[4];              // IP address of default gateway
 158         // ---- various device-specific handles ----
 159         pthread_t  arprx_thread;
 160         struct pcap     *p_arp;                  // pcap handle
 161         struct arp_table_struct *arp_table; // dedicated ARP table
 162         int        ps;                    // packet socket
 163 } device_list[MZ_MAX_DEVICES];
 164
 165 int device_list_entries;
 166
 167
 168 #pragma pack(1)
 169 struct struct_ethernet
 170 {
 171       u_int8_t   eth_da[6];
 172       u_int8_t   eth_sa[6];
 173       u_int16_t  eth_type;
 174 };
 175
 176 struct struct_arp
 177 {
 178    u_int16_t arp_hrd;  // hardware address format
 179    u_int16_t arp_pro;  // protocol address format
 180    u_int8_t  arp_hln;  // hardware address length
 181    u_int8_t  arp_pln;  // protocol address length
 182    u_int16_t arp_op;   // ARP operation type
 183    u_int8_t  arp_smac[6];  // sender's hardware address
 184    u_int8_t  arp_sip[4];  // sender's protocol address
 185    u_int8_t  arp_tmac[6];  // target hardware address
 186    u_int8_t  arp_tip[4];  // target protocol address
 187 };
 188
 189
 190
 191 //#pragma pack(1)
 192 struct struct_ip
 193 {
 194    u_int8_t
 195      hlen :4,
 196      ver  :4;
 197    u_int8_t
 198      tos;
 199    u_int16_t
 200      len;
 201
 202    u_int16_t
 203      id,
 204      offset;   // flags and fragment offset field
 205
 206    u_int8_t
 207      ttl,
 208      proto;
 209    u_int16_t
 210      sum;
 211
 212    u_int8_t  src[4];
 213    u_int8_t  dst[4];
 214 };
 215
 216 //#pragma pack(1)
 217 struct struct_udp {
 218         u_int16_t
 219                 sp,
 220                 dp,
 221                 len,
 222                 sum;
 223 };
 224
 225 //#pragma pack(1)
 226 struct struct_rtp {
 227         u_int8_t
 228                 byte1,
 229                 ptype;
 230         u_int16_t
 231                 sqnr;
 232         u_int32_t
 233                 timestamp,  // official timestamp, created by codecs
 234                 ssrc;
 235                 //   csrc,      // only used by mixers
 236         u_int16_t
 237                 ext_id,
 238                 ext_len;
 239         u_int32_t
 240                 time_sec,
 241                 time_nsec,
 242                 time_sec2,
 243                 time_nsec2;
 244 };
 245
 246 // ---------End of PCAP-specific definitions---------------
 247
 248
 249
 250
 251 // ************************************
 252 //
 253 //  Global variables
 254 //
 255 // ************************************
 256
 257 enum operating_modes
 258 {
 259         BYTE_STREAM,
 260         ARP,
 261         BPDU,
 262         IP,
 263         ICMP,
 264         ICMP6,
 265         UDP,
 266         TCP,
 267         DNS,
 268         CDP,
 269         RTP,
 270         RX_RTP,
 271         SYSLOG,
 272         LLDP,
 273         IGMP
 274 } mode;
 275
 276
 277 int ipv6_mode;
 278 int quiet;           // don't even print 'important standard short messages'
 279 int verbose;         // report character
 280 int simulate;        // if 1 then don't really send frames
 281
 282 char path[256];
 283 char filename[256];
 284 FILE *fp, *fp2;             // global multipurpose file pointer
 285
 286 long double total_d;
 287 clock_t mz_start, mz_stop;
 288
 289 enum rtp_display_mode {
 290         BAR, NCURSES, TEXT
 291 } rtp_dm;
 292
 293
 294 int mz_rand;
 295 int bwidth;
 296
 297 struct mz_timestamp {
 298         u_int32_t sec;
 299         u_int32_t nsec;
 300 };
 301
 302 struct mz_timestamp
 303         tv,
 304         timeTX[TIME_COUNT_MAX],
 305         timeRX[TIME_COUNT_MAX];
 306
 307 int32_t
 308   time0,
 309   jitter_rfc,
 310   jitter[TIME_COUNT_MAX];
 311
 312 int
 313   rtp_log,
 314   time0_flag,        // If set then time0 has valid data
 315   sqnr0_flag;
 316
 317 u_int8_t
 318   mz_ssrc[4];     // holds RTP stream identifier for rcv_rtp()
 319
 320 u_int16_t
 321   sqnr_cur,
 322   sqnr_last,
 323   sqnr_next;
 324
 325 u_int32_t
 326   drop,    // packet drop count
 327   dis,     // packet disorder count
 328   gind,      // a global index to run through deltaRX, deltaTX, and jitter
 329   gind_max,  // the amount of entries used in the (ugly oversized) arrays; per default set to TIME_COUNT
 330   gtotal;    // counts number of file write cycles (see "got_rtp_packet()")
 331
 332
 333 char rtp_filter_str[64];
 334
 335 struct tx_struct
 336 {
 337    // Management issues for TX
 338    char device[16];           // every packet could be sent through a different device
 339    int  packet_mode;          // 0 means use LIBNET_LINK_ADV, 1 means LIBNET_RAW4
 340    unsigned int count;        // 0 means infinite, 1 is default
 341    unsigned int delay;        // Delay in microseconds, 0 means no delay (default)
 342    char arg_string[MAX_PAYLOAD_SIZE];  // Argument-string when -t is used
 343
 344    // Ethernet and 802.3 parameters
 345    int eth_params_already_set; // if set to 1 then send_eth should only send the frame
 346    u_int8_t  eth_mac_own[6];  // Contains own interface MAC if needed by some modules
 347    char      eth_dst_txt[32]; // Text version of eth_dst (or keyword such as 'rand')
 348    u_int8_t  eth_dst[6];
 349    int       eth_dst_rand;    // 1 if random
 350    char      eth_src_txt[32]; // Text version of eth_src (or keyword such as 'rand')
 351    u_int8_t  eth_src[6];
 352    int       eth_src_rand;    // 1 if random
 353    u_int16_t eth_type;
 354    u_int16_t eth_len;
 355    u_int8_t  eth_payload[MAX_PAYLOAD_SIZE];
 356    u_int32_t eth_payload_s;
 357    unsigned int padding;
 358
 359    // CDP parameters
 360    u_int8_t
 361      cdp_version,
 362      cdp_ttl,
 363      cdp_payload[MAX_PAYLOAD_SIZE],
 364      cdp_tlv_id[2048];               // The ID is the only required TLV
 365    u_int16_t
 366      cdp_sum;
 367    u_int32_t
 368      cdp_tlv_id_len,
 369      cdp_payload_s;
 370
 371    // 802.1Q VLAN Tag
 372    int       dot1Q;           // 1 if specified
 373    char      dot1Q_txt[32];   // contains 802.1p(CoS) and VLAN-ID ("5:130" or only VLAN "130")
 374    u_int8_t  dot1Q_CoS;
 375    u_int16_t dot1Q_vlan;
 376    u_int8_t  dot1Q_header[256]; // Contains the complete 802.1Q/P headers (but NOT the Ethernet header!)
 377    u_int8_t  dot1Q_header_s;
 378    int       dot1Q_at_least_two_headers; // If '1' then we have at least QinQ (or more VLAN tags)
 379
 380    // ASCII PAYLOAD
 381    int       ascii;           // 1 if specified
 382    u_int8_t  ascii_payload[MAX_PAYLOAD_SIZE];
 383
 384    // HEX PAYLOAD
 385    u_int8_t  hex_payload[MAX_PAYLOAD_SIZE];
 386    u_int32_t hex_payload_s;   // >0 if hex payload is specified
 387
 388    // MPLS Parameters
 389    char      mpls_txt[128];   // contains MPLS parameters (label, exp, S, TTL)
 390    char      mpls_verbose_string[1024]; // contains all labels for print_frame_details()
 391    int       mpls;            // 1 if specified
 392    u_int32_t mpls_label;
 393    u_int8_t  mpls_exp;
 394    u_int8_t  mpls_bos;
 395    u_int8_t  mpls_ttl;
 396
 397    // IP parameters
 398    u_int32_t ip_src;          // has always network byte order(!)
 399    struct libnet_in6_addr ip6_src;
 400    char      ip_src_txt[256];
 401    int       ip_src_rand;     // if set to 1 then SA should be random
 402    u_int32_t ip_src_h;        // mirror of ip_src (NOT network byte order => easy to count)
 403    u_int32_t ip_src_start;    // start of range (NOT network byte order => easy to count)
 404    u_int32_t ip_src_stop;     // stop of range  (NOT network byte order => easy to count)
 405    struct libnet_in6_addr ip6_src_start;    // start of IPv6 range
 406    struct libnet_in6_addr ip6_src_stop;     // stop of IPv6 range
 407    int       ip_src_isrange;  // if set to 1 then the start/stop values above are valid.
 408    u_int32_t ip_dst;          // has always network byte order(!)
 409    struct libnet_in6_addr ip6_dst;
 410    char      ip_dst_txt[256];
 411    u_int32_t ip_dst_h;        // mirror of ip_dst (NOT network byte order => easy to count)
 412    u_int32_t ip_dst_start;    // start of range (NOT network byte order => easy to count)
 413    u_int32_t ip_dst_stop;     // stop of range  (NOT network byte order => easy to count)
 414    struct libnet_in6_addr ip6_dst_start;    // start of IPv6 range
 415    struct libnet_in6_addr ip6_dst_stop;     // stop of IPv6 range
 416    int       ip_dst_isrange;  // if set to 1 then the start/stop values above are valid.
 417    u_int16_t
 418      ip_len,
 419      ip_id,
 420      ip_frag,                 // Flags and Offset !!!
 421      ip_sum;
 422    u_int8_t
 423      ip_tos,
 424      ip_ttl,
 425      ip6_rtype,
 426      ip6_segs,
 427      ip_proto;
 428    u_int8_t
 429      ip_option[1024],
 430      ip_payload[MAX_PAYLOAD_SIZE];
 431    u_int32_t
 432      ip_flow,
 433      ip6_id,
 434      ip_option_s,
 435      ip_payload_s;
 436
 437    // ICMP
 438    char
 439      icmp_verbose_txt[256]; // used for verbose messages in send.c
 440    u_int8_t
 441      icmp_type,
 442      icmp_code;
 443    u_int16_t icmp_ident;    // ATTENTION: libnet.h already #defines 'icmp_id', 'icmp_sum', and 'icmp_num'
 444    u_int16_t  icmp_chksum;  //            therefore I needed a renaming here -- be careful in future...
 445    u_int16_t  icmp_sqnr;    //
 446    u_int32_t
 447      icmp_gateway,
 448      icmp_payload_s;
 449    u_int8_t
 450      icmp_payload[MAX_PAYLOAD_SIZE];
 451
 452    // General L4 parameters:
 453    char *layer4;
 454    u_int16_t
 455      sp, dp,
 456      sp_start, sp_stop,
 457      dp_start, dp_stop;
 458    int
 459      sp_isrange,               // if set to 1 then start/stop values above are valid
 460      dp_isrange;               // if set to 1 then start/stop values above are valid
 461
 462    // UDP parameters
 463    u_int16_t
 464      udp_len,                  // includes header size (8 bytes)
 465      udp_sum;
 466    u_int8_t
 467      udp_payload[MAX_PAYLOAD_SIZE];
 468    u_int32_t
 469      udp_payload_s;
 470
 471    // TCP parameters
 472    u_int32_t
 473      tcp_seq,
 474      tcp_seq_start,
 475      tcp_seq_stop,                  // is always set! Usually seq_start = seq_stop (=no range)
 476      tcp_seq_delta,                 // Also used instead of an 'isrange' variable
 477      tcp_ack;
 478    u_int8_t
 479      tcp_offset,
 480      tcp_control;
 481    u_int16_t
 482      tcp_win,
 483      tcp_sum,
 484      tcp_urg,
 485      tcp_len;                       // only needed by libnet and must include header size
 486    u_int8_t
 487      tcp_payload[MAX_PAYLOAD_SIZE];
 488    u_int32_t
 489      tcp_sum_part,
 490      tcp_payload_s;
 491
 492    // RTP parameters
 493    u_int32_t
 494      rtp_sqnr,
 495      rtp_stmp;
 496
 497 } tx;  // NOTE: tx elements are considered as default values for MOPS
 498
 499
 500
 501
 502
 503 u_int8_t  gbuf[MAX_PAYLOAD_SIZE];  // This is only a generic global buffer to handover data more easily
 504 u_int32_t gbuf_s;                  //
 505
 506
 507 // ************************************
 508 //
 509 //  Prototypes: General Tools
 510 //
 511 // ************************************
 512
 513 void clean_up(int sig);
 514 int getopts(int argc, char *argv[]);
 515 int getarg(char *str, char *arg_name, char *arg_value);
 516 unsigned long int str2int(char *str);       // converts "65535" to 65535
 517 unsigned long long int str2lint(char *str); // same but allows 64-bit integers
 518 unsigned long int xstr2int(char *str);      // converts "ffff" to 65535
 519 unsigned long long int xstr2lint(char *str);     // same but allows 64-bit integers
 520 int mz_strisbinary(char *str);
 521 int mz_strisnum(char *str);
 522 int mz_strishex(char *str);
 523 int str2bin8 (char *str);
 524 long int str2bin16 (char *str);
 525 int char2bits (char c, char *str);
 526 int mz_strcmp(char* usr, char* str, int min);
 527 int mz_tok(char * str, char * delim, int anz, ...);
 528 int delay_parse (struct timespec *t, char *a, char *b);
 529 int reset(void);
 530
 531 // ************************************
 532 //
 533 //  Prototypes: Layer1
 534 //
 535 // ************************************
 536
 537 int            send_eth(void);
 538 libnet_ptag_t  create_eth_frame (libnet_t *l, libnet_ptag_t  t3, libnet_ptag_t  t4);
 539
 540 // ************************************
 541 //
 542 //   Prototypes: Layer 2
 543 //
 544 // ************************************
 545
 546 int send_arp (void);
 547 int send_bpdu (void);
 548 int send_cdp (void);
 549
 550 // ************************************
 551 //
 552 //   Prototypes: Layer 3
 553 //
 554 // ************************************
 555
 556
 557 libnet_t*      get_link_context(void);
 558 libnet_ptag_t  create_ip_packet (libnet_t *l);
 559 libnet_ptag_t  create_ip6_packet (libnet_t *l);
 560 int            send_frame (libnet_t *l, libnet_ptag_t  t3, libnet_ptag_t  t4);
 561
 562
 563
 564 // ************************************
 565 //
 566 //   Prototypes: Layer 4
 567 //
 568 // ************************************
 569 libnet_ptag_t  create_udp_packet(libnet_t *l);
 570 libnet_ptag_t  create_icmp_packet(libnet_t *l);
 571 libnet_ptag_t  create_icmp6_packet(libnet_t *l);
 572 libnet_ptag_t  create_tcp_packet(libnet_t *l);
 573 libnet_ptag_t  create_igmp_packet(libnet_t *l);
 574
 575
 576 // ************************************
 577 //
 578 //   Prototypes: Layer 7
 579 //
 580 // ************************************
 581 int  create_dns_packet (void);
 582 int  create_rtp_packet(void);
 583 int create_syslog_packet(void);
 584
 585 // ************************************
 586 //
 587 //   Prototypes: Helper functions for
 588 //               byte manipulation,
 589 //               address conversion,
 590 //               etc
 591 //
 592 // ************************************
 593
 594 // Converts MAC address specified in str into u_int8_t array
 595 // Usage: str2hex_mac ( "00:01:02:aa:ff:ee", src_addr )
 596 int str2hex_mac (char* str, u_int8_t *addr);
 597
 598 // Converts ascii hex values (string) into integer array, similarly as above but for any size.
 599 // Example: "1a 00:00-2f" => {26, 0, 0, 47}
 600 // Note: apply any improvements here and prefer this function in future!
 601 // Return value: Number of converted elements (=length of array)
 602 int str2hex (char* str, u_int8_t *hp, int n);
 603
 604 // Converts ascii numbers (string) into integer array
 605 // Every byte can be specified as integers {0..255}
 606 // For example "192.16.1.1" will be converted to {C0, 10, 01, 01}
 607 int num2hex(char* str, u_int8_t *hp);
 608
 609 // Convert array of integers into string of hex. Useful for verification messages.
 610 // Example: {0,1,10} => "00-01-0A"
 611 // Usage: bs2str ( src_mac, src_mac_txt, 6 )
 612 int bs2str (u_int8_t *bs, char* str, int len);
 613
 614 // Extract contiguous sequence of bytes from an array. First element has index 1 !!!
 615 // Usage: getbytes (bs, da, 1, 6);
 616 int getbytes(u_int8_t *source, u_int8_t *target, int from, int to);
 617
 618 // For any IP address given in 'dotted decimal' returns an unsigned 32-bit integer.
 619 // Example: "192.168.0.1" => 3232235521
 620 // Note: Result is in LITTLE ENDIAN but usually with IP you need BIG ENDIAN, see next.
 621 u_int32_t str2ip32 (char* str);
 622
 623 // For any IP address given in 'dotted decimal' into an unsigned 32-bit integer
 624 // This version does the same as str2ip32() but in BIG ENDIAN.
 625 // Note: With netlib you need this one, not the previous function.
 626 u_int32_t str2ip32_rev (char* str);
 627
 628 // Converts a 2-byte value (e. g. a EtherType field)
 629 // into a nice string using hex notation.
 630 // Useful for verification messages.
 631 // Example: type2str (tx.eth_type, msg) may result in msg="08:00"
 632 // Return value: how many hex digits have been found.
 633 int type2str(u_int16_t type, char *str);
 634
 635
 636 // Parses string 'arg' for an IP range and finds start and stop IP addresses.
 637 // Return value: 0 upon success, 1 upon failure.
 638 //
 639 // NOTE: The results are written in the following variables:
 640 //
 641 //   (u_int32_t) tx.ip_dst_start    ... contains start value
 642 //   (u_int32_t) tx.ip_dst_stop     ... contains stop value
 643 //   int         tx.ip_dst_isrange  ... set to 1 if above values valid
 644 //
 645 // The other function does the same for the source address!
 646 //
 647 // Possible range specifications:
 648 //
 649 //   1) 192.168.0.0-192.168.0.12
 650 //   2) 10.2.11.0-10.55.13.2
 651 //   3) 172.18.96.0/19
 652 //
 653 // That is:
 654 //
 655 //   FIRST detect a range by scanning for the "-" OR "/" chars
 656 //   THEN determine start and stop value and store them as normal unsigned integers
 657 //
 658 int get_ip_range_dst (char *arg);
 659 int get_ip_range_src (char *arg);
 660 int get_ip6_range_src (char *arg, libnet_t *l);
 661 int get_ip6_range_dst (char *arg, libnet_t *l);
 662
 663 // Sets a random SA for a given IP packet.
 664 // Return value: 0 upon success, 1 upon failure
 665 //
 666 int set_rand_SA (libnet_t *l, libnet_ptag_t t3);
 667
 668 // Scans tx.eth_dst_txt or tx.eth_src_txt and sets the corresponding
 669 // MAC addresses (tx.eth_dst or tx.eth_src) accordingly.
 670 // Argument: What string should be checked, ETH_SRC or ETH_DST.
 671 // Return value:
 672 //       0 when a MAC address has been set or
 673 //       1 upon failure.
 674 // Currently eth_src|dst_txt can be:
 675 //   'rand', 'own', 'bc'|'bcast', 'stp', 'pvst',
 676 //   or a real mac address.
 677 //
 678 int check_eth_mac_txt(int src_or_dst);
 679
 680 // Scans argument for a port number or range
 681 // and sets the corresponding values in the
 682 // tx struct.
 683 //
 684 // Arguments: sp_or_dp is either SRC_PORT or DST_PORT
 685 // Return value: 0 on success, 1 upon failure
 686 //
 687 int get_port_range (int sp_or_dp, char *arg);
 688
 689 // Return a 4-byte unsigned int random number
 690 u_int32_t  mz_rand32 (void);
 691
 692 // Scans argument for TCP flags and sets
 693 // tx.tcp_control accordingly.
 694 //
 695 // Valid keywords are: fin, syn, rst, psh, ack, urg, ecn, cwr
 696 // Valid delimiters are: | or + or -
 697 // Return value: 0 on success, 1 upon failure
 698 //
 699 int get_tcp_flags (char*  flags);
 700
 701 // Scans string 'params' for MPLS parameters
 702 // and sets tx.mpls_* accordingly.
 703 //
 704 // CLI Syntax Examples:
 705 //
 706 // -M help       .... shows syntax
 707 //
 708 // -M 800        .... label=800
 709 // -M 800:S      .... label=800 and BOS flag set
 710 // -M 800:S:64   .... label=800, BOS, TTL=64
 711 // -M 800:64:S   .... same
 712 // -M 64:77      .... label=64, TTL=77
 713 // -M 64:800     .... INVALID
 714 // -M 800:64     .... label=800, TTL=64
 715 // -M 800:3:S:64 .... additionall the experimental bits are set (all fields required!)
 716 //
 717 // Note: S = BOS(1), s = NOT-BOS(0)
 718 //
 719 // Valid delimiters: :-.,+
 720 // Return value: 0 on success, 1 upon failure
 721 int get_mpls_params(char *params);
 722
 723 // Parses str for occurence of character or sequence ch.
 724 // Returns number of occurences
 725 int exists(char* str, char* ch);
 726
 727
 728 // Applies another random Ethernet source address to a given Ethernet-PTAG.
 729 // (The calling function should check 'tx.eth_src_rand' whether the SA
 730 // should be randomized.)
 731 int update_Eth_SA(libnet_t *l, libnet_ptag_t t);
 732
 733
 734 // Update timestamp and sequence number in the RTP header.
 735 // The actual RTP message is stored in tx.udp_payload.
 736 int update_RTP(libnet_t *l, libnet_ptag_t t);
 737
 738
 739 // Applies another SOURCE IP address,
 740 //  - either a random one (tx.ip_src_rand==1)
 741 //  - or from a specified range (tx.ip_src_isrange==1)
 742 // to a given IP-PTAG.
 743 //
 744 // Note: tx.ip_src MUST be already initialized with tx.ip_src_start.
 745 //       This is done by 'get_ip_range_src()' in tools.c.
 746 //
 747 // RETURNS '1' if tx.ip_src restarts
 748 int update_IP_SA (libnet_t *l, libnet_ptag_t t);
 749 int update_IP6_SA (libnet_t *l, libnet_ptag_t t);
 750
 751
 752 // Applies another DESTINATION IP address from a specified range (tx.ip_dst_isrange==1)
 753 // to a given IP-PTAG.
 754 //
 755 // Note: tx.ip_dst MUST be already initialized with tx.ip_dst_start.
 756 //       This is done by 'get_ip_range_dst()' in tools.c.
 757 //
 758 // RETURN VALUE: '1' if tx.ip_dst restarts
 759 int update_IP_DA(libnet_t *l, libnet_ptag_t t);
 760 int update_IP6_DA (libnet_t *l, libnet_ptag_t t);
 761
 762
 763 // Applies another DESTINATION PORT from a specified range to a given UDP- or TCP-PTAG.
 764 //
 765 // Note: tx.dp MUST be already initialized with tx.dp_start
 766 //       This is done by 'get_port_range()' in tools.c.
 767 //
 768 // RETURN VALUE: '1' if tx.dp restarts
 769 int update_DPORT(libnet_t *l, libnet_ptag_t t);
 770
 771
 772 // Applies another SOURCE PORT from a specified range to a given UDP- or TCP-PTAG.
 773 //
 774 // Note: tx.sp MUST be already initialized with tx.sp_start
 775 //       This is done by 'get_port_range()' in tools.c.
 776 //
 777 // RETURN VALUE: '1' if tx.sp restarts
 778 int update_SPORT(libnet_t *l, libnet_ptag_t t);
 779
 780
 781 // Applies another TCP SQNR from a specified range to a given TCP-PTAG
 782 //
 783 // RETURN VALUE: '1' if tx.txp_seq restarts
 784 //
 785 int update_TCP_SQNR(libnet_t *l, libnet_ptag_t t);
 786
 787 int update_ISUM(libnet_t *l, libnet_ptag_t t);
 788 int update_USUM(libnet_t *l, libnet_ptag_t t);
 789 int update_TSUM(libnet_t *l, libnet_ptag_t t);
 790
 791 //
 792 //
 793 int print_frame_details(void);
 794
 795 int in6_addr_cmp(struct libnet_in6_addr addr1, struct libnet_in6_addr addr2);
 796 int incr_in6_addr(struct libnet_in6_addr src, struct libnet_in6_addr *dst);
 797 uint64_t get_ip6_range_count(struct libnet_in6_addr start, struct libnet_in6_addr stop);
 798
 799 // Calculates the number of frames to be sent.
 800 // Should be used as standard output except the
 801 // 'quiet' option (-q) has been specified.
 802 int complexity(void);
 803
 804
 805 // Purpose: Calculate time deltas of two timestamps stored in struct timeval.
 806 // Subtract the "struct timeval" values X and Y, storing the result in RESULT.
 807 // Return 1 if the difference is negative, otherwise 0.
 808 int timestamp_subtract (struct mz_timestamp *x,
 809                         struct mz_timestamp *y,
 810                         struct mz_timestamp *result);
 811
 812 void timestamp_add (struct mz_timestamp *x,
 813                     struct mz_timestamp *y,
 814                     struct mz_timestamp *result);
 815
 816 // Returns a human readable timestamp in the string result.
 817 // Optionally a prefix can be specified, for example if the
 818 // timestamp is part of a filename.
 819 //
 820 // Example:
 821 //    char myTimeStamp[128];
 822 //
 823 //    timestamp_human(myTimeStamp, NULL);
 824 //
 825 //    => "20080718_155521"
 826 //
 827 //    /* or with prefix */
 828 //
 829 //    timestamp_human(myTimeStamp, "MZ_RTP_jitter_");
 830 //
 831 //    => MZ_RTP_jitter_20080718_155521
 832 //
 833 int timestamp_human(char* result, const char* prefix);
 834
 835 // Returns a human readable timestamp in the string result.
 836 // Optionally a prefix can be specified, for example if the
 837 // timestamp is part of a filename.
 838 //
 839 // Example:
 840 //    char myTimeStamp[8];
 841 //
 842 //    timestamp_hms (myTimeStamp);
 843 //
 844 //    => "15:55:21"
 845 int timestamp_hms(char* result);
 846
 847 // Initialize the rcv_rtp process: Read user parameters and initialize globals
 848 int rcv_rtp_init(void);
 849
 850 // Defines the pcap handler and the callback function
 851 int rcv_rtp(void);
 852
 853 // Print current RFC-Jitter on screen
 854 void print_jitterbar (long int j, unsigned int d);
 855
 856 // Compares two 4-byte variables byte by byte
 857 // returns 0 if identical, 1 if different
 858 int compare4B (u_int8_t *ip1, u_int8_t *ip2);
 859
 860 // PURPOSE: Find usable network devices
 861 //
 862 // NOTE:
 863 //
 864 //  1. Ignores devices without IP address
 865 //  2. Ignores loopback (etc)
 866 //
 867 // RETURN VALUES:
 868 //
 869 //  0 if usable device found (device_list[] and tx.device set)
 870 //  1 if no usable device found
 871 //
 872 int lookupdev(void);
 873
 874
 875 // For a given device name, find out the following parameters:
 876 //
 877 //  - MTU
 878 //  - Network
 879 //  - Mask
 880 //  - Default GW (IP)
 881 //
 882 int get_dev_params (char *name);
 883
 884 // Handler function to do something when RTP messages are received
 885 void got_rtp_packet(u_char *args,
 886                     const struct pcap_pkthdr *header, // statistics about the packet (see 'struct pcap_pkthdr')
 887                     const u_char *packet);            // the bytestring sniffed
 888
 889
 890 // Check if current system supports the nanosecond timer functions.
 891 // Additionally, measure the precision.
 892 // This function should be called upon program start.
 893 //
 894 int check_timer(void);
 895
 896 // This is the replacement for gettimeofday() which would result in 'jumps' if
 897 // the system clock is adjusted (e. g. via a NTP process) and finally the jitter
 898 // measurement would include wrong datapoints.
 899 //
 900 // Furthermore the function below utilizes the newer hi-res nanosecond timers.
 901 void getcurtime (struct mz_timestamp *t);
 902
 903 // Only print out the help text for the 02.1Q option
 904 void print_dot1Q_help(void);
 905
 906 // Determines ip and mac address of specified interface 'ifname'
 907 // Caller must provide an unsigned char ip[4], mac[6]
 908 //
 909 int get_if_addr (char *ifname, unsigned char *ip, unsigned char *mac);
 910
 911 // Takes filename and prepends valid configuration/logging directory
 912 // NOTE: filename is overwritten and must be big enough to hold full path!
 913 int getfullpath_cfg (char *filename);
 914 int getfullpath_log (char *filename);
 915
 916 // A safer replacement for strncpy which ensures \0-termination
 917 char * mz_strncpy(char *dest, const char *src, size_t n);
 918
 919 // Helper function to count the number of arguments
 920 // in the Mausezahn argument string (comma separated args)
 921 // RETURN VALUE: Number of arguments
 922 int number_of_args (char *str);
 923
 924 int arptable_add(struct device_struct *dev,
 925                  u_int8_t *sa,
 926                  u_int8_t *da,
 927                  u_int8_t *smac,
 928                  u_int8_t *sip,
 929                  u_int32_t sec,
 930                  u_int32_t nsec);
 931
 932 // Validate ARP requests
 933 int arpwatch(struct device_struct *dev,
 934              u_int8_t *sa,
 935              u_int8_t *da,
 936              u_int8_t *smac,
 937              u_int8_t *sip,
 938              u_int8_t *tmac,
 939              u_int8_t *tip,
 940              u_int32_t sec,
 941              u_int32_t nsec);
 942
 943
 944 #endif