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