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/mausezahn/"   // 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 } mode;
 274
 275
 276 int ipv6_mode;
 277 int quiet;           // don't even print 'important standard short messages'
 278 int verbose;         // report character
 279 int simulate;        // if 1 then don't really send frames
 280
 281 char path[256];
 282 char filename[256];
 283 FILE *fp, *fp2;             // global multipurpose file pointer
 284
 285 long double total_d;
 286 clock_t mz_start, mz_stop;
 287
 288 enum rtp_display_mode {
 289         BAR, NCURSES, TEXT
 290 } rtp_dm;
 291
 292
 293 int mz_rand;
 294 int bwidth;
 295
 296 struct mz_timestamp {
 297         u_int32_t sec;
 298         u_int32_t nsec;
 299 };
 300
 301 struct mz_timestamp
 302         tv,
 303         timeTX[TIME_COUNT_MAX],
 304         timeRX[TIME_COUNT_MAX];
 305
 306 int32_t
 307   time0,
 308   jitter_rfc,
 309   jitter[TIME_COUNT_MAX];
 310
 311 int
 312   rtp_log,
 313   time0_flag,        // If set then time0 has valid data
 314   sqnr0_flag;
 315
 316 u_int8_t
 317   mz_ssrc[4];     // holds RTP stream identifier for rcv_rtp()
 318
 319 u_int16_t
 320   sqnr_cur,
 321   sqnr_last,
 322   sqnr_next;
 323
 324 u_int32_t
 325   drop,    // packet drop count
 326   dis,     // packet disorder count
 327   gind,      // a global index to run through deltaRX, deltaTX, and jitter
 328   gind_max,  // the amount of entries used in the (ugly oversized) arrays; per default set to TIME_COUNT
 329   gtotal;    // counts number of file write cycles (see "got_rtp_packet()")
 330
 331
 332 char rtp_filter_str[64];
 333
 334 struct tx_struct
 335 {
 336    // Management issues for TX
 337    char device[16];           // every packet could be sent through a different device
 338    int  packet_mode;          // 0 means use LIBNET_LINK_ADV, 1 means LIBNET_RAW4
 339    unsigned int count;        // 0 means infinite, 1 is default
 340    unsigned int delay;        // Delay in microseconds, 0 means no delay (default)
 341    char arg_string[MAX_PAYLOAD_SIZE];  // Argument-string when -t is used
 342
 343    // Ethernet and 802.3 parameters
 344    int eth_params_already_set; // if set to 1 then send_eth should only send the frame
 345    u_int8_t  eth_mac_own[6];  // Contains own interface MAC if needed by some modules
 346    char      eth_dst_txt[32]; // Text version of eth_dst (or keyword such as 'rand')
 347    u_int8_t  eth_dst[6];
 348    int       eth_dst_rand;    // 1 if random
 349    char      eth_src_txt[32]; // Text version of eth_src (or keyword such as 'rand')
 350    u_int8_t  eth_src[6];
 351    int       eth_src_rand;    // 1 if random
 352    u_int16_t eth_type;
 353    u_int16_t eth_len;
 354    u_int8_t  eth_payload[MAX_PAYLOAD_SIZE];
 355    u_int32_t eth_payload_s;
 356    unsigned int padding;
 357
 358    // CDP parameters
 359    u_int8_t
 360      cdp_version,
 361      cdp_ttl,
 362      cdp_payload[MAX_PAYLOAD_SIZE],
 363      cdp_tlv_id[2048];               // The ID is the only required TLV
 364    u_int16_t
 365      cdp_sum;
 366    u_int32_t
 367      cdp_tlv_id_len,
 368      cdp_payload_s;
 369
 370    // 802.1Q VLAN Tag
 371    int       dot1Q;           // 1 if specified
 372    char      dot1Q_txt[32];   // contains 802.1p(CoS) and VLAN-ID ("5:130" or only VLAN "130")
 373    u_int8_t  dot1Q_CoS;
 374    u_int16_t dot1Q_vlan;
 375    u_int8_t  dot1Q_header[256]; // Contains the complete 802.1Q/P headers (but NOT the Ethernet header!)
 376    u_int8_t  dot1Q_header_s;
 377    int       dot1Q_at_least_two_headers; // If '1' then we have at least QinQ (or more VLAN tags)
 378
 379    // ASCII PAYLOAD
 380    int       ascii;           // 1 if specified
 381    u_int8_t  ascii_payload[MAX_PAYLOAD_SIZE];
 382
 383    // HEX PAYLOAD
 384    u_int8_t  hex_payload[MAX_PAYLOAD_SIZE];
 385    u_int32_t hex_payload_s;   // >0 if hex payload is specified
 386
 387    // MPLS Parameters
 388    char      mpls_txt[128];   // contains MPLS parameters (label, exp, S, TTL)
 389    char      mpls_verbose_string[1024]; // contains all labels for print_frame_details()
 390    int       mpls;            // 1 if specified
 391    u_int32_t mpls_label;
 392    u_int8_t  mpls_exp;
 393    u_int8_t  mpls_bos;
 394    u_int8_t  mpls_ttl;
 395
 396    // IP parameters
 397    u_int32_t ip_src;          // has always network byte order(!)
 398    struct libnet_in6_addr ip6_src;
 399    char      ip_src_txt[256];
 400    int       ip_src_rand;     // if set to 1 then SA should be random
 401    u_int32_t ip_src_h;        // mirror of ip_src (NOT network byte order => easy to count)
 402    u_int32_t ip_src_start;    // start of range (NOT network byte order => easy to count)
 403    u_int32_t ip_src_stop;     // stop of range  (NOT network byte order => easy to count)
 404    int       ip_src_isrange;  // if set to 1 then the start/stop values above are valid.
 405    u_int32_t ip_dst;          // has always network byte order(!)
 406    struct libnet_in6_addr ip6_dst;
 407    char      ip_dst_txt[256];
 408    u_int32_t ip_dst_h;        // mirror of ip_dst (NOT network byte order => easy to count)
 409    u_int32_t ip_dst_start;    // start of range (NOT network byte order => easy to count)
 410    u_int32_t ip_dst_stop;     // stop of range  (NOT network byte order => easy to count)
 411    int       ip_dst_isrange;  // if set to 1 then the start/stop values above are valid.
 412    u_int16_t
 413      ip_len,
 414      ip_id,
 415      ip_frag,                 // Flags and Offset !!!
 416      ip_sum;
 417    u_int8_t
 418      ip_tos,
 419      ip_ttl,
 420      ip6_rtype,
 421      ip6_segs,
 422      ip_proto;
 423    u_int8_t
 424      ip_option[1024],
 425      ip_payload[MAX_PAYLOAD_SIZE];
 426    u_int32_t
 427      ip_flow,
 428      ip6_id,
 429      ip_option_s,
 430      ip_payload_s;
 431
 432    // ICMP
 433    char
 434      icmp_verbose_txt[256]; // used for verbose messages in send.c
 435    u_int8_t
 436      icmp_type,
 437      icmp_code;
 438    u_int16_t icmp_ident;    // ATTENTION: libnet.h already #defines 'icmp_id', 'icmp_sum', and 'icmp_num'
 439    u_int16_t  icmp_chksum;  //            therefore I needed a renaming here -- be careful in future...
 440    u_int16_t  icmp_sqnr;    //
 441    u_int32_t
 442      icmp_gateway,
 443      icmp_payload_s;
 444    u_int8_t
 445      icmp_payload[MAX_PAYLOAD_SIZE];
 446
 447    // General L4 parameters:
 448    char *layer4;
 449    u_int16_t
 450      sp, dp,
 451      sp_start, sp_stop,
 452      dp_start, dp_stop;
 453    int
 454      sp_isrange,               // if set to 1 then start/stop values above are valid
 455      dp_isrange;               // if set to 1 then start/stop values above are valid
 456
 457    // UDP parameters
 458    u_int16_t
 459      udp_len,                  // includes header size (8 bytes)
 460      udp_sum;
 461    u_int8_t
 462      udp_payload[MAX_PAYLOAD_SIZE];
 463    u_int32_t
 464      udp_payload_s;
 465
 466    // TCP parameters
 467    u_int32_t
 468      tcp_seq,
 469      tcp_seq_start,
 470      tcp_seq_stop,                  // is always set! Usually seq_start = seq_stop (=no range)
 471      tcp_seq_delta,                 // Also used instead of an 'isrange' variable
 472      tcp_ack;
 473    u_int8_t
 474      tcp_offset,
 475      tcp_control;
 476    u_int16_t
 477      tcp_win,
 478      tcp_sum,
 479      tcp_urg,
 480      tcp_len;                       // only needed by libnet and must include header size
 481    u_int8_t
 482      tcp_payload[MAX_PAYLOAD_SIZE];
 483    u_int32_t
 484      tcp_sum_part,
 485      tcp_payload_s;
 486
 487    // RTP parameters
 488    u_int32_t
 489      rtp_sqnr,
 490      rtp_stmp;
 491
 492 } tx;  // NOTE: tx elements are considered as default values for MOPS
 493
 494
 495
 496
 497
 498 u_int8_t  gbuf[MAX_PAYLOAD_SIZE];  // This is only a generic global buffer to handover data more easily
 499 u_int32_t gbuf_s;                  //
 500
 501
 502 // ************************************
 503 //
 504 //  Prototypes: General Tools
 505 //
 506 // ************************************
 507
 508 void clean_up(int sig);
 509 int getopts(int argc, char *argv[]);
 510 int getarg(char *str, char *arg_name, char *arg_value);
 511 unsigned long int str2int(char *str);       // converts "65535" to 65535
 512 unsigned long long int str2lint(char *str); // same but allows 64-bit integers
 513 unsigned long int xstr2int(char *str);      // converts "ffff" to 65535
 514 unsigned long long int xstr2lint(char *str);     // same but allows 64-bit integers
 515 int mz_strisbinary(char *str);
 516 int mz_strisnum(char *str);
 517 int mz_strishex(char *str);
 518 int str2bin8 (char *str);
 519 long int str2bin16 (char *str);
 520 int char2bits (char c, char *str);
 521 int mz_strcmp(char* usr, char* str, int min);
 522 int mz_tok(char * str, char * delim, int anz, ...);
 523 int delay_parse (struct timespec *t, char *a, char *b);
 524 int reset();
 525
 526 // ************************************
 527 //
 528 //  Prototypes: Layer1
 529 //
 530 // ************************************
 531
 532 int            send_eth(void);
 533 libnet_ptag_t  create_eth_frame (libnet_t *l, libnet_ptag_t  t3, libnet_ptag_t  t4);
 534
 535 // ************************************
 536 //
 537 //   Prototypes: Layer 2
 538 //
 539 // ************************************
 540
 541 int send_arp (void);
 542 int send_bpdu (void);
 543 int send_cdp (void);
 544
 545 // ************************************
 546 //
 547 //   Prototypes: Layer 3
 548 //
 549 // ************************************
 550
 551
 552 libnet_t*      get_link_context(void);
 553 libnet_ptag_t  create_ip_packet (libnet_t *l);
 554 libnet_ptag_t  create_ip6_packet (libnet_t *l);
 555 int            send_frame (libnet_t *l, libnet_ptag_t  t3, libnet_ptag_t  t4);
 556
 557
 558
 559 // ************************************
 560 //
 561 //   Prototypes: Layer 4
 562 //
 563 // ************************************
 564 libnet_ptag_t  create_udp_packet (libnet_t *l);
 565 libnet_ptag_t  create_icmp_packet (libnet_t *l);
 566 libnet_ptag_t  create_icmp6_packet (libnet_t *l);
 567 libnet_ptag_t  create_tcp_packet (libnet_t *l);
 568
 569
 570 // ************************************
 571 //
 572 //   Prototypes: Layer 7
 573 //
 574 // ************************************
 575 int  create_dns_packet (void);
 576 int  create_rtp_packet(void);
 577 int create_syslog_packet(void);
 578
 579 // ************************************
 580 //
 581 //   Prototypes: Helper functions for
 582 //               byte manipulation,
 583 //               address conversion,
 584 //               etc
 585 //
 586 // ************************************
 587
 588 // Converts MAC address specified in str into u_int8_t array
 589 // Usage: str2hex_mac ( "00:01:02:aa:ff:ee", src_addr )
 590 int str2hex_mac (char* str, u_int8_t *addr);
 591
 592 // Converts ascii hex values (string) into integer array, similarly as above but for any size.
 593 // Example: "1a 00:00-2f" => {26, 0, 0, 47}
 594 // Note: apply any improvements here and prefer this function in future!
 595 // Return value: Number of converted elements (=length of array)
 596 int str2hex (char* str, u_int8_t *hp, int n);
 597
 598 // Converts ascii numbers (string) into integer array
 599 // Every byte can be specified as integers {0..255}
 600 // For example "192.16.1.1" will be converted to {C0, 10, 01, 01}
 601 int num2hex(char* str, u_int8_t *hp);
 602
 603 // Convert array of integers into string of hex. Useful for verification messages.
 604 // Example: {0,1,10} => "00-01-0A"
 605 // Usage: bs2str ( src_mac, src_mac_txt, 6 )
 606 int bs2str (u_int8_t *bs, char* str, int len);
 607
 608 // Extract contiguous sequence of bytes from an array. First element has index 1 !!!
 609 // Usage: getbytes (bs, da, 1, 6);
 610 int getbytes(u_int8_t *source, u_int8_t *target, int from, int to);
 611
 612 // For any IP address given in 'dotted decimal' returns an unsigned 32-bit integer.
 613 // Example: "192.168.0.1" => 3232235521
 614 // Note: Result is in LITTLE ENDIAN but usually with IP you need BIG ENDIAN, see next.
 615 u_int32_t str2ip32 (char* str);
 616
 617 // For any IP address given in 'dotted decimal' into an unsigned 32-bit integer
 618 // This version does the same as str2ip32() but in BIG ENDIAN.
 619 // Note: With netlib you need this one, not the previous function.
 620 u_int32_t str2ip32_rev (char* str);
 621
 622 // Converts a 2-byte value (e. g. a EtherType field)
 623 // into a nice string using hex notation.
 624 // Useful for verification messages.
 625 // Example: type2str (tx.eth_type, msg) may result in msg="08:00"
 626 // Return value: how many hex digits have been found.
 627 int type2str(u_int16_t type, char *str);
 628
 629
 630 // Parses string 'arg' for an IP range and finds start and stop IP addresses.
 631 // Return value: 0 upon success, 1 upon failure.
 632 //
 633 // NOTE: The results are written in the following variables:
 634 //
 635 //   (u_int32_t) tx.ip_dst_start    ... contains start value
 636 //   (u_int32_t) tx.ip_dst_stop     ... contains stop value
 637 //   int         tx.ip_dst_isrange  ... set to 1 if above values valid
 638 //
 639 // The other function does the same for the source address!
 640 //
 641 // Possible range specifications:
 642 //
 643 //   1) 192.168.0.0-192.168.0.12
 644 //   2) 10.2.11.0-10.55.13.2
 645 //   3) 172.18.96.0/19
 646 //
 647 // That is:
 648 //
 649 //   FIRST detect a range by scanning for the "-" OR "/" chars
 650 //   THEN determine start and stop value and store them as normal unsigned integers
 651 //
 652 int get_ip_range_dst (char *arg);
 653 int get_ip_range_src (char *arg);
 654
 655 // Sets a random SA for a given IP packet.
 656 // Return value: 0 upon success, 1 upon failure
 657 //
 658 int set_rand_SA (libnet_t *l, libnet_ptag_t t3);
 659
 660 // Scans tx.eth_dst_txt or tx.eth_src_txt and sets the corresponding
 661 // MAC addresses (tx.eth_dst or tx.eth_src) accordingly.
 662 // Argument: What string should be checked, ETH_SRC or ETH_DST.
 663 // Return value:
 664 //       0 when a MAC address has been set or
 665 //       1 upon failure.
 666 // Currently eth_src|dst_txt can be:
 667 //   'rand', 'own', 'bc'|'bcast', 'stp', 'pvst',
 668 //   or a real mac address.
 669 //
 670 int check_eth_mac_txt(int src_or_dst);
 671
 672 // Scans argument for a port number or range
 673 // and sets the corresponding values in the
 674 // tx struct.
 675 //
 676 // Arguments: sp_or_dp is either SRC_PORT or DST_PORT
 677 // Return value: 0 on success, 1 upon failure
 678 //
 679 int get_port_range (int sp_or_dp, char *arg);
 680
 681 // Return a 4-byte unsigned int random number
 682 u_int32_t  mz_rand32 (void);
 683
 684 // Scans argument for TCP flags and sets
 685 // tx.tcp_control accordingly.
 686 //
 687 // Valid keywords are: fin, syn, rst, psh, ack, urg, ecn, cwr
 688 // Valid delimiters are: | or + or -
 689 // Return value: 0 on success, 1 upon failure
 690 //
 691 int get_tcp_flags (char*  flags);
 692
 693 // Scans string 'params' for MPLS parameters
 694 // and sets tx.mpls_* accordingly.
 695 //
 696 // CLI Syntax Examples:
 697 //
 698 // -M help       .... shows syntax
 699 //
 700 // -M 800        .... label=800
 701 // -M 800:S      .... label=800 and BOS flag set
 702 // -M 800:S:64   .... label=800, BOS, TTL=64
 703 // -M 800:64:S   .... same
 704 // -M 64:77      .... label=64, TTL=77
 705 // -M 64:800     .... INVALID
 706 // -M 800:64     .... label=800, TTL=64
 707 // -M 800:3:S:64 .... additionall the experimental bits are set (all fields required!)
 708 //
 709 // Note: S = BOS(1), s = NOT-BOS(0)
 710 //
 711 // Valid delimiters: :-.,+
 712 // Return value: 0 on success, 1 upon failure
 713 int get_mpls_params(char *params);
 714
 715 // Parses str for occurence of character or sequence ch.
 716 // Returns number of occurences
 717 int exists(char* str, char* ch);
 718
 719
 720 // Applies another random Ethernet source address to a given Ethernet-PTAG.
 721 // (The calling function should check 'tx.eth_src_rand' whether the SA
 722 // should be randomized.)
 723 int update_Eth_SA(libnet_t *l, libnet_ptag_t t);
 724
 725
 726 // Update timestamp and sequence number in the RTP header.
 727 // The actual RTP message is stored in tx.udp_payload.
 728 int update_RTP(libnet_t *l, libnet_ptag_t t);
 729
 730
 731 // Applies another SOURCE IP address,
 732 //  - either a random one (tx.ip_src_rand==1)
 733 //  - or from a specified range (tx.ip_src_isrange==1)
 734 // to a given IP-PTAG.
 735 //
 736 // Note: tx.ip_src MUST be already initialized with tx.ip_src_start.
 737 //       This is done by 'get_ip_range_src()' in tools.c.
 738 //
 739 // RETURNS '1' if tx.ip_src restarts
 740 int update_IP_SA (libnet_t *l, libnet_ptag_t t);
 741
 742
 743 // Applies another DESTINATION IP address from a specified range (tx.ip_dst_isrange==1)
 744 // to a given IP-PTAG.
 745 //
 746 // Note: tx.ip_dst MUST be already initialized with tx.ip_dst_start.
 747 //       This is done by 'get_ip_range_dst()' in tools.c.
 748 //
 749 // RETURN VALUE: '1' if tx.ip_dst restarts
 750 int update_IP_DA(libnet_t *l, libnet_ptag_t t);
 751
 752
 753 // Applies another DESTINATION PORT from a specified range to a given UDP- or TCP-PTAG.
 754 //
 755 // Note: tx.dp MUST be already initialized with tx.dp_start
 756 //       This is done by 'get_port_range()' in tools.c.
 757 //
 758 // RETURN VALUE: '1' if tx.dp restarts
 759 int update_DPORT(libnet_t *l, libnet_ptag_t t);
 760
 761
 762 // Applies another SOURCE PORT from a specified range to a given UDP- or TCP-PTAG.
 763 //
 764 // Note: tx.sp MUST be already initialized with tx.sp_start
 765 //       This is done by 'get_port_range()' in tools.c.
 766 //
 767 // RETURN VALUE: '1' if tx.sp restarts
 768 int update_SPORT(libnet_t *l, libnet_ptag_t t);
 769
 770
 771 // Applies another TCP SQNR from a specified range to a given TCP-PTAG
 772 //
 773 // RETURN VALUE: '1' if tx.txp_seq restarts
 774 //
 775 int update_TCP_SQNR(libnet_t *l, libnet_ptag_t t);
 776
 777 int update_ISUM(libnet_t *l, libnet_ptag_t t);
 778 int update_USUM(libnet_t *l, libnet_ptag_t t);
 779 int update_TSUM(libnet_t *l, libnet_ptag_t t);
 780
 781 //
 782 //
 783 int print_frame_details(void);
 784
 785
 786 // Calculates the number of frames to be sent.
 787 // Should be used as standard output except the
 788 // 'quiet' option (-q) has been specified.
 789 int complexity(void);
 790
 791
 792 // Purpose: Calculate time deltas of two timestamps stored in struct timeval.
 793 // Subtract the "struct timeval" values X and Y, storing the result in RESULT.
 794 // Return 1 if the difference is negative, otherwise 0.
 795 int timestamp_subtract (struct mz_timestamp *x,
 796                         struct mz_timestamp *y,
 797                         struct mz_timestamp *result);
 798
 799 void timestamp_add (struct mz_timestamp *x,
 800                     struct mz_timestamp *y,
 801                     struct mz_timestamp *result);
 802
 803 // Returns a human readable timestamp in the string result.
 804 // Optionally a prefix can be specified, for example if the
 805 // timestamp is part of a filename.
 806 //
 807 // Example:
 808 //    char myTimeStamp[128];
 809 //
 810 //    timestamp_human(myTimeStamp, NULL);
 811 //
 812 //    => "20080718_155521"
 813 //
 814 //    /* or with prefix */
 815 //
 816 //    timestamp_human(myTimeStamp, "MZ_RTP_jitter_");
 817 //
 818 //    => MZ_RTP_jitter_20080718_155521
 819 //
 820 int timestamp_human(char* result, const char* prefix);
 821
 822 // Returns a human readable timestamp in the string result.
 823 // Optionally a prefix can be specified, for example if the
 824 // timestamp is part of a filename.
 825 //
 826 // Example:
 827 //    char myTimeStamp[8];
 828 //
 829 //    timestamp_hms (myTimeStamp);
 830 //
 831 //    => "15:55:21"
 832 int timestamp_hms(char* result);
 833
 834 // Initialize the rcv_rtp process: Read user parameters and initialize globals
 835 int rcv_rtp_init(void);
 836
 837 // Defines the pcap handler and the callback function
 838 int rcv_rtp(void);
 839
 840 // Print current RFC-Jitter on screen
 841 void print_jitterbar (long int j, unsigned int d);
 842
 843 // Compares two 4-byte variables byte by byte
 844 // returns 0 if identical, 1 if different
 845 int compare4B (u_int8_t *ip1, u_int8_t *ip2);
 846
 847 // PURPOSE: Find usable network devices
 848 //
 849 // NOTE:
 850 //
 851 //  1. Ignores devices without IP address
 852 //  2. Ignores loopback (etc)
 853 //
 854 // RETURN VALUES:
 855 //
 856 //  0 if usable device found (device_list[] and tx.device set)
 857 //  1 if no usable device found
 858 //
 859 int lookupdev(void);
 860
 861
 862 // For a given device name, find out the following parameters:
 863 //
 864 //  - MTU
 865 //  - Network
 866 //  - Mask
 867 //  - Default GW (IP)
 868 //
 869 int get_dev_params (char *name);
 870
 871 // Handler function to do something when RTP messages are received
 872 void got_rtp_packet(u_char *args,
 873                     const struct pcap_pkthdr *header, // statistics about the packet (see 'struct pcap_pkthdr')
 874                     const u_char *packet);            // the bytestring sniffed
 875
 876
 877 // Check if current system supports the nanosecond timer functions.
 878 // Additionally, measure the precision.
 879 // This function should be called upon program start.
 880 //
 881 int check_timer(void);
 882
 883 // This is the replacement for gettimeofday() which would result in 'jumps' if
 884 // the system clock is adjusted (e. g. via a NTP process) and finally the jitter
 885 // measurement would include wrong datapoints.
 886 //
 887 // Furthermore the function below utilizes the newer hi-res nanosecond timers.
 888 void getcurtime (struct mz_timestamp *t);
 889
 890 // Only print out the help text for the 02.1Q option
 891 void print_dot1Q_help(void);
 892
 893 // Determines ip and mac address of specified interface 'ifname'
 894 // Caller must provide an unsigned char ip[4], mac[6]
 895 //
 896 int get_if_addr (char *ifname, unsigned char *ip, unsigned char *mac);
 897
 898 // Takes filename and prepends valid configuration/logging directory
 899 // NOTE: filename is overwritten and must be big enough to hold full path!
 900 int getfullpath_cfg (char *filename);
 901 int getfullpath_log (char *filename);
 902
 903 // A safer replacement for strncpy which ensures \0-termination
 904 char * mz_strncpy(char *dest, const char *src, size_t n);
 905
 906 // Helper function to count the number of arguments
 907 // in the Mausezahn argument string (comma separated args)
 908 // RETURN VALUE: Number of arguments
 909 int number_of_args (char *str);
 910
 911 int arptable_add(struct device_struct *dev,
 912                  u_int8_t *sa,
 913                  u_int8_t *da,
 914                  u_int8_t *smac,
 915                  u_int8_t *sip,
 916                  u_int32_t sec,
 917                  u_int32_t nsec);
 918
 919 // Validate ARP requests
 920 int arpwatch(struct device_struct *dev,
 921              u_int8_t *sa,
 922              u_int8_t *da,
 923              u_int8_t *smac,
 924              u_int8_t *sip,
 925              u_int8_t *tmac,
 926              u_int8_t *tip,
 927              u_int32_t sec,
 928              u_int32_t nsec);
 929
 930
 931 #endif