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