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    int       ip_src_isrange;  // if set to 1 then the start/stop values above are valid.
 406    u_int32_t ip_dst;          // has always network byte order(!)
 407    struct libnet_in6_addr ip6_dst;
 408    char      ip_dst_txt[256];
 409    u_int32_t ip_dst_h;        // mirror of ip_dst (NOT network byte order => easy to count)
 410    u_int32_t ip_dst_start;    // start of range (NOT network byte order => easy to count)
 411    u_int32_t ip_dst_stop;     // stop of range  (NOT network byte order => easy to count)
 412    int       ip_dst_isrange;  // if set to 1 then the start/stop values above are valid.
 413    u_int16_t
 414      ip_len,
 415      ip_id,
 416      ip_frag,                 // Flags and Offset !!!
 417      ip_sum;
 418    u_int8_t
 419      ip_tos,
 420      ip_ttl,
 421      ip6_rtype,
 422      ip6_segs,
 423      ip_proto;
 424    u_int8_t
 425      ip_option[1024],
 426      ip_payload[MAX_PAYLOAD_SIZE];
 427    u_int32_t
 428      ip_flow,
 429      ip6_id,
 430      ip_option_s,
 431      ip_payload_s;
 432
 433    // ICMP
 434    char
 435      icmp_verbose_txt[256]; // used for verbose messages in send.c
 436    u_int8_t
 437      icmp_type,
 438      icmp_code;
 439    u_int16_t icmp_ident;    // ATTENTION: libnet.h already #defines 'icmp_id', 'icmp_sum', and 'icmp_num'
 440    u_int16_t  icmp_chksum;  //            therefore I needed a renaming here -- be careful in future...
 441    u_int16_t  icmp_sqnr;    //
 442    u_int32_t
 443      icmp_gateway,
 444      icmp_payload_s;
 445    u_int8_t
 446      icmp_payload[MAX_PAYLOAD_SIZE];
 447
 448    // General L4 parameters:
 449    char *layer4;
 450    u_int16_t
 451      sp, dp,
 452      sp_start, sp_stop,
 453      dp_start, dp_stop;
 454    int
 455      sp_isrange,               // if set to 1 then start/stop values above are valid
 456      dp_isrange;               // if set to 1 then start/stop values above are valid
 457
 458    // UDP parameters
 459    u_int16_t
 460      udp_len,                  // includes header size (8 bytes)
 461      udp_sum;
 462    u_int8_t
 463      udp_payload[MAX_PAYLOAD_SIZE];
 464    u_int32_t
 465      udp_payload_s;
 466
 467    // TCP parameters
 468    u_int32_t
 469      tcp_seq,
 470      tcp_seq_start,
 471      tcp_seq_stop,                  // is always set! Usually seq_start = seq_stop (=no range)
 472      tcp_seq_delta,                 // Also used instead of an 'isrange' variable
 473      tcp_ack;
 474    u_int8_t
 475      tcp_offset,
 476      tcp_control;
 477    u_int16_t
 478      tcp_win,
 479      tcp_sum,
 480      tcp_urg,
 481      tcp_len;                       // only needed by libnet and must include header size
 482    u_int8_t
 483      tcp_payload[MAX_PAYLOAD_SIZE];
 484    u_int32_t
 485      tcp_sum_part,
 486      tcp_payload_s;
 487
 488    // RTP parameters
 489    u_int32_t
 490      rtp_sqnr,
 491      rtp_stmp;
 492
 493 } tx;  // NOTE: tx elements are considered as default values for MOPS
 494
 495
 496
 497
 498
 499 u_int8_t  gbuf[MAX_PAYLOAD_SIZE];  // This is only a generic global buffer to handover data more easily
 500 u_int32_t gbuf_s;                  //
 501
 502
 503 // ************************************
 504 //
 505 //  Prototypes: General Tools
 506 //
 507 // ************************************
 508
 509 void clean_up(int sig);
 510 int getopts(int argc, char *argv[]);
 511 int getarg(char *str, char *arg_name, char *arg_value);
 512 unsigned long int str2int(char *str);       // converts "65535" to 65535
 513 unsigned long long int str2lint(char *str); // same but allows 64-bit integers
 514 unsigned long int xstr2int(char *str);      // converts "ffff" to 65535
 515 unsigned long long int xstr2lint(char *str);     // same but allows 64-bit integers
 516 int mz_strisbinary(char *str);
 517 int mz_strisnum(char *str);
 518 int mz_strishex(char *str);
 519 int str2bin8 (char *str);
 520 long int str2bin16 (char *str);
 521 int char2bits (char c, char *str);
 522 int mz_strcmp(char* usr, char* str, int min);
 523 int mz_tok(char * str, char * delim, int anz, ...);
 524 int delay_parse (struct timespec *t, char *a, char *b);
 525 int reset(void);
 526
 527 // ************************************
 528 //
 529 //  Prototypes: Layer1
 530 //
 531 // ************************************
 532
 533 int            send_eth(void);
 534 libnet_ptag_t  create_eth_frame (libnet_t *l, libnet_ptag_t  t3, libnet_ptag_t  t4);
 535
 536 // ************************************
 537 //
 538 //   Prototypes: Layer 2
 539 //
 540 // ************************************
 541
 542 int send_arp (void);
 543 int send_bpdu (void);
 544 int send_cdp (void);
 545
 546 // ************************************
 547 //
 548 //   Prototypes: Layer 3
 549 //
 550 // ************************************
 551
 552
 553 libnet_t*      get_link_context(void);
 554 libnet_ptag_t  create_ip_packet (libnet_t *l);
 555 libnet_ptag_t  create_ip6_packet (libnet_t *l);
 556 int            send_frame (libnet_t *l, libnet_ptag_t  t3, libnet_ptag_t  t4);
 557
 558
 559
 560 // ************************************
 561 //
 562 //   Prototypes: Layer 4
 563 //
 564 // ************************************
 565 libnet_ptag_t  create_udp_packet(libnet_t *l);
 566 libnet_ptag_t  create_icmp_packet(libnet_t *l);
 567 libnet_ptag_t  create_icmp6_packet(libnet_t *l);
 568 libnet_ptag_t  create_tcp_packet(libnet_t *l);
 569 libnet_ptag_t  create_igmp_packet(libnet_t *l);
 570
 571
 572 // ************************************
 573 //
 574 //   Prototypes: Layer 7
 575 //
 576 // ************************************
 577 int  create_dns_packet (void);
 578 int  create_rtp_packet(void);
 579 int create_syslog_packet(void);
 580
 581 // ************************************
 582 //
 583 //   Prototypes: Helper functions for
 584 //               byte manipulation,
 585 //               address conversion,
 586 //               etc
 587 //
 588 // ************************************
 589
 590 // Converts MAC address specified in str into u_int8_t array
 591 // Usage: str2hex_mac ( "00:01:02:aa:ff:ee", src_addr )
 592 int str2hex_mac (char* str, u_int8_t *addr);
 593
 594 // Converts ascii hex values (string) into integer array, similarly as above but for any size.
 595 // Example: "1a 00:00-2f" => {26, 0, 0, 47}
 596 // Note: apply any improvements here and prefer this function in future!
 597 // Return value: Number of converted elements (=length of array)
 598 int str2hex (char* str, u_int8_t *hp, int n);
 599
 600 // Converts ascii numbers (string) into integer array
 601 // Every byte can be specified as integers {0..255}
 602 // For example "192.16.1.1" will be converted to {C0, 10, 01, 01}
 603 int num2hex(char* str, u_int8_t *hp);
 604
 605 // Convert array of integers into string of hex. Useful for verification messages.
 606 // Example: {0,1,10} => "00-01-0A"
 607 // Usage: bs2str ( src_mac, src_mac_txt, 6 )
 608 int bs2str (u_int8_t *bs, char* str, int len);
 609
 610 // Extract contiguous sequence of bytes from an array. First element has index 1 !!!
 611 // Usage: getbytes (bs, da, 1, 6);
 612 int getbytes(u_int8_t *source, u_int8_t *target, int from, int to);
 613
 614 // For any IP address given in 'dotted decimal' returns an unsigned 32-bit integer.
 615 // Example: "192.168.0.1" => 3232235521
 616 // Note: Result is in LITTLE ENDIAN but usually with IP you need BIG ENDIAN, see next.
 617 u_int32_t str2ip32 (char* str);
 618
 619 // For any IP address given in 'dotted decimal' into an unsigned 32-bit integer
 620 // This version does the same as str2ip32() but in BIG ENDIAN.
 621 // Note: With netlib you need this one, not the previous function.
 622 u_int32_t str2ip32_rev (char* str);
 623
 624 // Converts a 2-byte value (e. g. a EtherType field)
 625 // into a nice string using hex notation.
 626 // Useful for verification messages.
 627 // Example: type2str (tx.eth_type, msg) may result in msg="08:00"
 628 // Return value: how many hex digits have been found.
 629 int type2str(u_int16_t type, char *str);
 630
 631
 632 // Parses string 'arg' for an IP range and finds start and stop IP addresses.
 633 // Return value: 0 upon success, 1 upon failure.
 634 //
 635 // NOTE: The results are written in the following variables:
 636 //
 637 //   (u_int32_t) tx.ip_dst_start    ... contains start value
 638 //   (u_int32_t) tx.ip_dst_stop     ... contains stop value
 639 //   int         tx.ip_dst_isrange  ... set to 1 if above values valid
 640 //
 641 // The other function does the same for the source address!
 642 //
 643 // Possible range specifications:
 644 //
 645 //   1) 192.168.0.0-192.168.0.12
 646 //   2) 10.2.11.0-10.55.13.2
 647 //   3) 172.18.96.0/19
 648 //
 649 // That is:
 650 //
 651 //   FIRST detect a range by scanning for the "-" OR "/" chars
 652 //   THEN determine start and stop value and store them as normal unsigned integers
 653 //
 654 int get_ip_range_dst (char *arg);
 655 int get_ip_range_src (char *arg);
 656
 657 // Sets a random SA for a given IP packet.
 658 // Return value: 0 upon success, 1 upon failure
 659 //
 660 int set_rand_SA (libnet_t *l, libnet_ptag_t t3);
 661
 662 // Scans tx.eth_dst_txt or tx.eth_src_txt and sets the corresponding
 663 // MAC addresses (tx.eth_dst or tx.eth_src) accordingly.
 664 // Argument: What string should be checked, ETH_SRC or ETH_DST.
 665 // Return value:
 666 //       0 when a MAC address has been set or
 667 //       1 upon failure.
 668 // Currently eth_src|dst_txt can be:
 669 //   'rand', 'own', 'bc'|'bcast', 'stp', 'pvst',
 670 //   or a real mac address.
 671 //
 672 int check_eth_mac_txt(int src_or_dst);
 673
 674 // Scans argument for a port number or range
 675 // and sets the corresponding values in the
 676 // tx struct.
 677 //
 678 // Arguments: sp_or_dp is either SRC_PORT or DST_PORT
 679 // Return value: 0 on success, 1 upon failure
 680 //
 681 int get_port_range (int sp_or_dp, char *arg);
 682
 683 // Return a 4-byte unsigned int random number
 684 u_int32_t  mz_rand32 (void);
 685
 686 // Scans argument for TCP flags and sets
 687 // tx.tcp_control accordingly.
 688 //
 689 // Valid keywords are: fin, syn, rst, psh, ack, urg, ecn, cwr
 690 // Valid delimiters are: | or + or -
 691 // Return value: 0 on success, 1 upon failure
 692 //
 693 int get_tcp_flags (char*  flags);
 694
 695 // Scans string 'params' for MPLS parameters
 696 // and sets tx.mpls_* accordingly.
 697 //
 698 // CLI Syntax Examples:
 699 //
 700 // -M help       .... shows syntax
 701 //
 702 // -M 800        .... label=800
 703 // -M 800:S      .... label=800 and BOS flag set
 704 // -M 800:S:64   .... label=800, BOS, TTL=64
 705 // -M 800:64:S   .... same
 706 // -M 64:77      .... label=64, TTL=77
 707 // -M 64:800     .... INVALID
 708 // -M 800:64     .... label=800, TTL=64
 709 // -M 800:3:S:64 .... additionall the experimental bits are set (all fields required!)
 710 //
 711 // Note: S = BOS(1), s = NOT-BOS(0)
 712 //
 713 // Valid delimiters: :-.,+
 714 // Return value: 0 on success, 1 upon failure
 715 int get_mpls_params(char *params);
 716
 717 // Parses str for occurence of character or sequence ch.
 718 // Returns number of occurences
 719 int exists(char* str, char* ch);
 720
 721
 722 // Applies another random Ethernet source address to a given Ethernet-PTAG.
 723 // (The calling function should check 'tx.eth_src_rand' whether the SA
 724 // should be randomized.)
 725 int update_Eth_SA(libnet_t *l, libnet_ptag_t t);
 726
 727
 728 // Update timestamp and sequence number in the RTP header.
 729 // The actual RTP message is stored in tx.udp_payload.
 730 int update_RTP(libnet_t *l, libnet_ptag_t t);
 731
 732
 733 // Applies another SOURCE IP address,
 734 //  - either a random one (tx.ip_src_rand==1)
 735 //  - or from a specified range (tx.ip_src_isrange==1)
 736 // to a given IP-PTAG.
 737 //
 738 // Note: tx.ip_src MUST be already initialized with tx.ip_src_start.
 739 //       This is done by 'get_ip_range_src()' in tools.c.
 740 //
 741 // RETURNS '1' if tx.ip_src restarts
 742 int update_IP_SA (libnet_t *l, libnet_ptag_t t);
 743
 744
 745 // Applies another DESTINATION IP address from a specified range (tx.ip_dst_isrange==1)
 746 // to a given IP-PTAG.
 747 //
 748 // Note: tx.ip_dst MUST be already initialized with tx.ip_dst_start.
 749 //       This is done by 'get_ip_range_dst()' in tools.c.
 750 //
 751 // RETURN VALUE: '1' if tx.ip_dst restarts
 752 int update_IP_DA(libnet_t *l, libnet_ptag_t t);
 753
 754
 755 // Applies another DESTINATION PORT from a specified range to a given UDP- or TCP-PTAG.
 756 //
 757 // Note: tx.dp MUST be already initialized with tx.dp_start
 758 //       This is done by 'get_port_range()' in tools.c.
 759 //
 760 // RETURN VALUE: '1' if tx.dp restarts
 761 int update_DPORT(libnet_t *l, libnet_ptag_t t);
 762
 763
 764 // Applies another SOURCE PORT from a specified range to a given UDP- or TCP-PTAG.
 765 //
 766 // Note: tx.sp MUST be already initialized with tx.sp_start
 767 //       This is done by 'get_port_range()' in tools.c.
 768 //
 769 // RETURN VALUE: '1' if tx.sp restarts
 770 int update_SPORT(libnet_t *l, libnet_ptag_t t);
 771
 772
 773 // Applies another TCP SQNR from a specified range to a given TCP-PTAG
 774 //
 775 // RETURN VALUE: '1' if tx.txp_seq restarts
 776 //
 777 int update_TCP_SQNR(libnet_t *l, libnet_ptag_t t);
 778
 779 int update_ISUM(libnet_t *l, libnet_ptag_t t);
 780 int update_USUM(libnet_t *l, libnet_ptag_t t);
 781 int update_TSUM(libnet_t *l, libnet_ptag_t t);
 782
 783 //
 784 //
 785 int print_frame_details(void);
 786
 787
 788 // Calculates the number of frames to be sent.
 789 // Should be used as standard output except the
 790 // 'quiet' option (-q) has been specified.
 791 int complexity(void);
 792
 793
 794 // Purpose: Calculate time deltas of two timestamps stored in struct timeval.
 795 // Subtract the "struct timeval" values X and Y, storing the result in RESULT.
 796 // Return 1 if the difference is negative, otherwise 0.
 797 int timestamp_subtract (struct mz_timestamp *x,
 798                         struct mz_timestamp *y,
 799                         struct mz_timestamp *result);
 800
 801 void timestamp_add (struct mz_timestamp *x,
 802                     struct mz_timestamp *y,
 803                     struct mz_timestamp *result);
 804
 805 // Returns a human readable timestamp in the string result.
 806 // Optionally a prefix can be specified, for example if the
 807 // timestamp is part of a filename.
 808 //
 809 // Example:
 810 //    char myTimeStamp[128];
 811 //
 812 //    timestamp_human(myTimeStamp, NULL);
 813 //
 814 //    => "20080718_155521"
 815 //
 816 //    /* or with prefix */
 817 //
 818 //    timestamp_human(myTimeStamp, "MZ_RTP_jitter_");
 819 //
 820 //    => MZ_RTP_jitter_20080718_155521
 821 //
 822 int timestamp_human(char* result, const char* prefix);
 823
 824 // Returns a human readable timestamp in the string result.
 825 // Optionally a prefix can be specified, for example if the
 826 // timestamp is part of a filename.
 827 //
 828 // Example:
 829 //    char myTimeStamp[8];
 830 //
 831 //    timestamp_hms (myTimeStamp);
 832 //
 833 //    => "15:55:21"
 834 int timestamp_hms(char* result);
 835
 836 // Initialize the rcv_rtp process: Read user parameters and initialize globals
 837 int rcv_rtp_init(void);
 838
 839 // Defines the pcap handler and the callback function
 840 int rcv_rtp(void);
 841
 842 // Print current RFC-Jitter on screen
 843 void print_jitterbar (long int j, unsigned int d);
 844
 845 // Compares two 4-byte variables byte by byte
 846 // returns 0 if identical, 1 if different
 847 int compare4B (u_int8_t *ip1, u_int8_t *ip2);
 848
 849 // PURPOSE: Find usable network devices
 850 //
 851 // NOTE:
 852 //
 853 //  1. Ignores devices without IP address
 854 //  2. Ignores loopback (etc)
 855 //
 856 // RETURN VALUES:
 857 //
 858 //  0 if usable device found (device_list[] and tx.device set)
 859 //  1 if no usable device found
 860 //
 861 int lookupdev(void);
 862
 863
 864 // For a given device name, find out the following parameters:
 865 //
 866 //  - MTU
 867 //  - Network
 868 //  - Mask
 869 //  - Default GW (IP)
 870 //
 871 int get_dev_params (char *name);
 872
 873 // Handler function to do something when RTP messages are received
 874 void got_rtp_packet(u_char *args,
 875                     const struct pcap_pkthdr *header, // statistics about the packet (see 'struct pcap_pkthdr')
 876                     const u_char *packet);            // the bytestring sniffed
 877
 878
 879 // Check if current system supports the nanosecond timer functions.
 880 // Additionally, measure the precision.
 881 // This function should be called upon program start.
 882 //
 883 int check_timer(void);
 884
 885 // This is the replacement for gettimeofday() which would result in 'jumps' if
 886 // the system clock is adjusted (e. g. via a NTP process) and finally the jitter
 887 // measurement would include wrong datapoints.
 888 //
 889 // Furthermore the function below utilizes the newer hi-res nanosecond timers.
 890 void getcurtime (struct mz_timestamp *t);
 891
 892 // Only print out the help text for the 02.1Q option
 893 void print_dot1Q_help(void);
 894
 895 // Determines ip and mac address of specified interface 'ifname'
 896 // Caller must provide an unsigned char ip[4], mac[6]
 897 //
 898 int get_if_addr (char *ifname, unsigned char *ip, unsigned char *mac);
 899
 900 // Takes filename and prepends valid configuration/logging directory
 901 // NOTE: filename is overwritten and must be big enough to hold full path!
 902 int getfullpath_cfg (char *filename);
 903 int getfullpath_log (char *filename);
 904
 905 // A safer replacement for strncpy which ensures \0-termination
 906 char * mz_strncpy(char *dest, const char *src, size_t n);
 907
 908 // Helper function to count the number of arguments
 909 // in the Mausezahn argument string (comma separated args)
 910 // RETURN VALUE: Number of arguments
 911 int number_of_args (char *str);
 912
 913 int arptable_add(struct device_struct *dev,
 914                  u_int8_t *sa,
 915                  u_int8_t *da,
 916                  u_int8_t *smac,
 917                  u_int8_t *sip,
 918                  u_int32_t sec,
 919                  u_int32_t nsec);
 920
 921 // Validate ARP requests
 922 int arpwatch(struct device_struct *dev,
 923              u_int8_t *sa,
 924              u_int8_t *da,
 925              u_int8_t *smac,
 926              u_int8_t *sip,
 927              u_int8_t *tmac,
 928              u_int8_t *tip,
 929              u_int32_t sec,
 930              u_int32_t nsec);
 931
 932
 933 #endif