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tcptrace.h
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/*
* Copyright (c) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
* Ohio University.
*
* ---
*
* Starting with the release of tcptrace version 6 in 2001, tcptrace
* is licensed under the GNU General Public License (GPL). We believe
* that, among the available licenses, the GPL will do the best job of
* allowing tcptrace to continue to be a valuable, freely-available
* and well-maintained tool for the networking community.
*
* Previous versions of tcptrace were released under a license that
* was much less restrictive with respect to how tcptrace could be
* used in commercial products. Because of this, I am willing to
* consider alternate license arrangements as allowed in Section 10 of
* the GNU GPL. Before I would consider licensing tcptrace under an
* alternate agreement with a particular individual or company,
* however, I would have to be convinced that such an alternative
* would be to the greater benefit of the networking community.
*
* ---
*
* This file is part of Tcptrace.
*
* Tcptrace was originally written and continues to be maintained by
* Shawn Ostermann with the help of a group of devoted students and
* users (see the file 'THANKS'). The work on tcptrace has been made
* possible over the years through the generous support of NASA GRC,
* the National Science Foundation, and Sun Microsystems.
*
* Tcptrace is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Tcptrace is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Tcptrace (in the file 'COPYING'); if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
* Author: Shawn Ostermann
* School of Electrical Engineering and Computer Science
* Ohio University
* Athens, OH
* ostermann@cs.ohiou.edu
* http://www.tcptrace.org/
*/
static char const rcsid_tcptrace[] =
"@(#)$Header$";
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <sys/types.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <net/if.h>
#if __FreeBSD__ >= 2
#include <osreldate.h>
#if __FreeBSD_version >= 300000
#include <net/if_var.h>
#endif
#endif
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <arpa/inet.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <netdb.h>
#include <ctype.h>
#include <signal.h>
#include <sys/stat.h>
#include <stdarg.h>
#include <stdlib.h>
#include <math.h>
/* IPv6 support */
#include "ipv6.h"
/* dynamic string support */
#include "dstring.h"
/* memory allocation routines */
#include "pool.h"
/* we want LONG LONG in some places */
#if SIZEOF_UNSIGNED_LONG_LONG_INT >= 8
#define HAVE_LONG_LONG
typedef unsigned long long int u_llong;
typedef long long int llong;
/* Thanks to MacOSX, they use %qu to print unsigned long long ints */
/* There is a test to see if we need to use %qu or %llu to print these variables */
/* The test is located in configure.in */
#ifdef USE_LLU
#define FS_ULL "llu" /* For most systems use llu */
#define FS_LL "lld" /* For most systems use ll */
#else /* USE_LLU */
#define FS_ULL "qu" /* MacOSX use qu */
#define FS_LL "qd" /* MacOSX use qd */
#endif /* USE_LLU */
#else /* LONG LONG */
typedef unsigned long int u_llong;
typedef long int llong;
#define FS_ULL "lu" /* No long long unsigned, so use lu */
#define FS_LL "ld" /* No long long ints, so use ld */
#endif /* LONG LONG */
/* plotter information */
typedef int PLOTTER;
#define NO_PLOTTER -1
#define NCOLORS 8
extern char *ColorNames[NCOLORS];
/* {"green", "red", "blue", "yellow", "purple", "orange", "magenta", "pink"}; */
typedef struct pl_line *PLINE;
/* max number of letters in endpoint name */
/* (8 allows 26**8 different endpoints (209,000,000,000)
probably plenty for now!!!!!) */
#define MAX_HOSTLETTER_LEN 8
/* several places in the code NEED numbers of a specific size. */
/* since the definitions aren't standard across everything we're */
/* trying to support, the types are gathered up here */
/* specifically, we need:
tt_uint32 unsigned 32 bit
tt_uint16 unsigned 16 bit
tt_int32 signed 32 bit
tt_int16 signed 16 bit
*/
/* first, do the 32 bit ones */
#if SIZEOF_UNSIGNED_LONG_INT == 4
typedef unsigned long tt_uint32;
typedef long tt_int32;
#else
#if SIZEOF_UNSIGNED_INT == 4
typedef unsigned int tt_uint32;
typedef int tt_int32;
#else
OOPS: Please insert an appropriate 32-bit unsigned type here!
OOPS: Please insert an appropriate 32-bit signed type here!
#endif /* SIZEOF_UNSIGNED_INT == 4 */
#endif /* SIZEOF_UNSIGNED_LONG_INT == 4 */
/* first, do the 16 bit ones */
#if SIZEOF_UNSIGNED_INT == 2
typedef unsigned int tt_uint16;
typedef int tt_int16;
#else
#if SIZEOF_UNSIGNED_SHORT == 2
typedef unsigned short tt_uint16;
typedef short tt_int16;
#else
OOPS: Please insert an appropriate 16-bit unsigned type here!
OOPS: Please insert an appropriate 16-bit signed type here!
#endif /* SIZEOF_UNSIGNED_INT == 4 */
#endif /* SIZEOF_UNSIGNED_LONG_INT == 4 */
/* type for a TCP sequence number, ACK, FIN, or SYN */
/* This type MUST be a 32-bit unsigned number */
typedef tt_uint32 seqnum;
/* length of a segment */
typedef u_long seglen;
/* type for a quadrant number */
typedef u_char quadnum; /* 1,2,3,4 */
/* type for a TCP port number */
typedef u_short portnum;
/* type for an IP address */
/* IP address can be either IPv4 or IPv6 */
typedef struct ipaddr {
u_char addr_vers; /* 4 or 6 */
union {
struct in_addr ip4;
struct in6_addr ip6;
} un;
} ipaddr;
#ifndef __VMS
/* some machines (TRUE64 for one) handle the 4-bit TCP/IP fields
differently, so this macro simplifies life */
#define IP_HL(pip) ((pip)->ip_hl)
#define IP_V(pip) ((pip)->ip_v)
#define TH_X2(ptcp) ((ptcp)->th_x2)
#define TH_OFF(ptcp) ((ptcp)->th_off)
/* some systems (darwin at least) use this for something else */
#else
/* One alternative looks like this: */
#define IP_HL(pip) ((pip)->ip_vhl&0xf)
#define IP_V(pip) ((pip)->ip_vhl>>4)
#define TH_X2(ptcp) ((ptcp)->th_xoff&0xf)
#define TH_OFF(ptcp) ((ptcp)->th_xoff>>4)
#endif
#undef TH_FLAGS
#define TH_FLAGS(ptcp) ((ptcp)->th_flags)
/* type for a timestamp */
typedef struct timeval timeval;
#define ZERO_TIME(ptv)(((ptv)->tv_sec == 0) && ((ptv)->tv_usec == 0))
/* type for a Boolean */
typedef u_char Bool;
#define TRUE 1
#define FALSE 0
#define BOOL2STR(b) (b)?"TRUE":"FALSE"
/* ACK types */
enum t_ack {NORMAL = 1, /* no retransmits, just advance */
AMBIG = 2, /* segment ACKed was rexmitted */
CUMUL = 3, /* doesn't advance */
TRIPLE = 4, /* triple dupack */
NOSAMP = 5}; /* covers retransmitted segs, no rtt sample */
/* type for an internal file pointer */
typedef struct mfile MFILE;
/* file name information */
extern char **filenames; /* all the files on the cmd line */
extern char *cur_filename; /* the current file */
/* first and last packet timestamp */
extern timeval first_packet;
extern timeval last_packet;
/* counters */
extern u_long tcp_trace_count;
extern u_long udp_trace_count;
#ifdef OLD
/* test 2 IP addresses for equality */
#define IP_SAMEADDR(addr1,addr2) (((addr1).s_addr) == ((addr2).s_addr))
/* copy IP addresses */
#define IP_COPYADDR(toaddr,fromaddr) ((toaddr).s_addr = (fromaddr).s_addr)
#endif
typedef struct segment {
seqnum seq_firstbyte; /* seqnumber of first byte */
seqnum seq_lastbyte; /* seqnumber of last byte */
u_char retrans; /* retransmit count */
u_int acked; /* how MANY times has has it been acked? */
timeval time; /* time the segment was sent */
struct segment *next;
struct segment *prev;
} segment;
typedef struct quadrant {
segment *seglist_head;
segment *seglist_tail;
Bool full;
struct quadrant *prev;
struct quadrant *next;
} quadrant;
typedef struct seqspace {
quadrant *pquad[4];
} seqspace;
typedef struct tcb {
/* parent pointer */
struct stcp_pair *ptp;
struct tcb *ptwin;
/* TCP information */
seqnum ack;
seqnum seq;
seqnum syn;
seqnum fin;
seqnum windowend;
timeval time;
/* TCP options */
u_int mss;
Bool f1323_ws; /* did he request 1323 window scaling? */
Bool f1323_ts; /* did he request 1323 timestamps? */
Bool fsack_req; /* did he request SACKs? */
u_char window_scale;
/* If we are using window scaling, have we adjusted the
win_min field from the non-scaled window size
that appeared in the SYN packet?? */
Bool window_stats_updated_for_scaling;
/* statistics added */
u_llong data_bytes;
u_llong data_pkts;
u_llong data_pkts_push;
u_llong unique_bytes; /* bytes sent (-FIN/SYN), excluding rexmits */
u_llong rexmit_bytes;
u_llong rexmit_pkts;
u_llong ack_pkts;
u_llong pureack_pkts; /* mallman - pure acks, no data */
u_long win_max;
u_long win_min;
u_long win_tot;
u_long win_last; /* last advertised window size*/
u_long win_zero_ct;
u_llong packets;
u_char syn_count;
u_char fin_count;
u_char reset_count; /* resets SENT */
u_long min_seg_size;
u_long max_seg_size;
u_llong out_order_pkts; /* out of order packets */
u_llong sacks_sent; /* sacks returned */
u_long ipv6_segments; /* how many segments were ipv6? */
/* stats on urgent data */
u_long urg_data_bytes;
u_long urg_data_pkts;
/* stats on sequence numbers */
/* Statistics to store the number of Zero window probes
seen and the total number of bytes spent for it. */
u_long num_zwnd_probes;
u_long zwnd_probe_bytes;
/* stats on sequence numbers */
seqnum min_seq; /* smallest seq number seen */
seqnum max_seq; /* largest seq number seen */
seqnum latest_seq; /* most recent seq number seen */
/* stats on sequence space wrap arounds */
u_int quad1, quad2, quad3, quad4; /* was every quadrant visited */
u_int seq_wrap_count; /* wrap count */
/* hardware duplicate detection */
#define SEGS_TO_REMEMBER 8
struct str_hardware_dups {
seqnum hwdup_seq; /* sequence number */
u_short hwdup_id; /* IP ID */
u_long hwdup_packnum; /* packet number */
} hardware_dups[SEGS_TO_REMEMBER];
u_long num_hardware_dups;
u_char hardware_dups_ix;
/* did I detect any "bad" tcp behavior? */
/* at present, this means: */
/* - SYNs retransmitted with different sequence numbers */
/* - FINs retransmitted with different sequence numbers */
Bool bad_behavior;
/* added for initial window stats (for Mallman) */
u_long initialwin_bytes; /* initial window (in bytes) */
u_long initialwin_segs; /* initial window (in segments) */
Bool data_acked; /* has any non-SYN data been acked? */
/* added for (estimated) congestions window stats (for Mallman) */
u_long owin_max;
u_long owin_min;
u_llong owin_tot;
u_llong owin_wavg; /* weighted owin */
u_llong owin_count;
u_long previous_owin_sample;
timeval previous_owin_sample_time;
/* RTT stats for singly-transmitted segments */
double rtt_last; /* RTT as of last good ACK (microseconds) */
u_long rtt_min;
u_long rtt_max;
double rtt_sum; /* for averages */
double rtt_sum2; /* sum of squares, for stdev */
u_long rtt_count; /* for averages */
/* RTT stats for multiply-transmitted segments */
u_long rtt_min_last;
u_long rtt_max_last;
double rtt_sum_last; /* from last transmission, for averages */
double rtt_sum2_last; /* sum of squares, for stdev */
u_long rtt_count_last; /* from last transmission, for averages */
/* To keep track of stats for FULL SIZE segments
Simple heuristic :
We shall treat the largest packet, so far seen as the
"full size" packet and collect stats. accordingly.
Upon seeing a bigger packet, we flush all stats. collected
incorrectly and begin all over again */
u_long rtt_full_size;
u_long rtt_full_min;
u_long rtt_full_max;
double rtt_full_sum; /* for averages */
double rtt_full_sum2; /* sum of squares for stdev */
u_long rtt_full_count; /* for averages */
u_long rtt_3WHS; /* rtt value used to seed RTO timers */
/* ACK Counters */
u_llong rtt_amback; /* ambiguous ACK */
u_llong rtt_cumack; /* segments only cumulativly ACKed */
u_llong rtt_nosample; /* segments ACKED, but after retransmission */
/* of earlier segments, so sample isn't */
/* valid */
u_llong rtt_unkack; /* unknown ACKs ??? */
u_llong rtt_dupack; /* duplicate ACKs */
u_llong rtt_triple_dupack; /* triple duplicate ACKs */
/* retransmission information */
seqspace *ss; /* the sequence space*/
u_long retr_max; /* maximum retransmissions ct */
u_long retr_min_tm; /* minimum retransmissions time */
u_long retr_max_tm; /* maximum retransmissions time */
double retr_tm_sum; /* for averages */
double retr_tm_sum2; /* sum of squares, for stdev */
u_long retr_tm_count; /* for averages */
/* Instantaneous throughput info */
timeval thru_firsttime; /* time of first packet this interval */
u_long thru_bytes; /* number of bytes this interval */
u_long thru_pkts; /* number of packets this interval */
PLOTTER thru_plotter; /* throughput data dump file */
timeval thru_lasttime; /* time of previous segment */
PLINE thru_avg_line; /* average throughput line */
PLINE thru_inst_line; /* instantaneous throughput line */
/* data transfer time stamps - mallman */
timeval first_data_time;
timeval last_data_time;
/* Time Sequence Graph info for this one */
PLOTTER tsg_plotter;
char *tsg_plotfile;
/* Time Line Graph */
PLOTTER tline_plotter;
/* Dumped RTT samples */
MFILE *rtt_dump_file;
/* Extracted stream contents */
MFILE *extr_contents_file;
u_llong trunc_bytes; /* data bytes not see due to trace file truncation */
u_llong trunc_segs; /* segments with trunc'd bytes */
seqnum extr_lastseq; /* last sequence number we stored */
seqnum extr_initseq; /* initial sequence number (same as SYN unless we missed it) */
/* RTT Graph info for this one */
PLOTTER rtt_plotter;
PLINE rtt_line;
/* Segment size graph */
PLOTTER segsize_plotter;
PLINE segsize_line;
PLINE segsize_avg_line;
/* Congestion window graph */
PLOTTER owin_plotter;
PLINE owin_line;
PLINE owin_avg_line;
PLINE owin_wavg_line;
/* for tracking unidirectional idle time */
timeval last_time; /* last packet SENT from this side */
u_llong idle_max; /* maximum idle time observed (usecs) */
/* for looking for interesting SACK blocks */
u_long num_sacks;
u_long max_sack_blocks;
/* host name letter(s) */
char *host_letter;
} tcb;
typedef u_short hash;
typedef struct {
ipaddr a_address;
ipaddr b_address;
portnum a_port;
portnum b_port;
hash hash;
} tcp_pair_addrblock;
struct stcp_pair {
/* are we ignoring this one?? */
Bool ignore_pair;
/* inactive (previous instance of current connection */
Bool inactive;
/* endpoint identification */
tcp_pair_addrblock addr_pair;
/* connection naming information */
char *a_hostname;
char *b_hostname;
char *a_portname;
char *b_portname;
char *a_endpoint;
char *b_endpoint;
/* connection information */
timeval first_time;
timeval last_time;
u_llong packets;
tcb a2b;
tcb b2a;
/* module-specific structures, if requested */
void **pmod_info;
/* which file this connection is from */
char *filename;
};
typedef struct stcp_pair tcp_pair;
typedef struct tcphdr tcphdr;
extern int num_tcp_pairs; /* how many pairs are in use */
extern tcp_pair **ttp; /* array of pointers to allocated pairs */
/* Tue Nov 17, 1998 */
/* prior to version 5.13, we kept a hash table of all of the connections. */
/* The most recently-accessed connections move to the front of the bucket */
/* linked list. Unfortunately, when reading thousands of connections on */
/* a machine with limited physical memory, this worked poorly. Every time */
/* a new connection opened, we had to search the entire bucket, which */
/* pulled all of the paged-out connections back into memory. The new */
/* system keeps a quick snapshot of the connection (ptp_snap) in the */
/* hash table. We only retrieve the connection record if the snapshot */
/* matches. The result is that it works MUCH better when memory is low. */
typedef struct ptp_snap {
tcp_pair_addrblock addr_pair; /* just a copy */
struct ptp_snap *next;
void *ptp;
} ptp_snap;
typedef struct ptp_ptr {
struct ptp_ptr *next;
struct ptp_ptr *prev;
struct ptp_snap *from;
tcp_pair *ptp;
} ptp_ptr;
#define REMOVE_LIVE_CONN_INTERVAL 8*3600 /* 8 hours */
#define REMOVE_CLOSED_CONN_INTERVAL 8*60 /* 8 minutes */
#define UPDATE_INTERVAL 30 /* 30 seconds */
#define MAX_CONN_NUM 50000 /* max number of connections */
/* for continuous mode */
/* minimal support for UDP "connections" */
typedef struct ucb {
/* parent pointer */
struct sudp_pair *pup;
struct ucb *ptwin;
/* statistics added */
u_llong data_bytes;
u_llong packets;
u_long min_dg_size;
u_long max_dg_size;
/* host name letter(s) */
char *host_letter;
} ucb;
typedef tcp_pair_addrblock udp_pair_addrblock;
struct sudp_pair {
/* endpoint identification */
udp_pair_addrblock addr_pair;
/* connection naming information */
char *a_hostname;
char *b_hostname;
char *a_portname;
char *b_portname;
char *a_endpoint;
char *b_endpoint;
/* connection information */
timeval first_time;
timeval last_time;
u_llong packets;
ucb a2b;
ucb b2a;
/* module-specific structures, if requested */
void **pmod_info;
/* which file this connection is from */
char *filename;
/* linked list of usage */
struct sudp_pair *next;
};
typedef struct sudp_pair udp_pair;
typedef struct udphdr udphdr;
extern int num_udp_pairs; /* how many pairs are in use */
extern udp_pair **utp; /* array of pointers to allocated pairs */
/* option flags */
extern Bool colorplot;
extern Bool dump_rtt;
extern Bool graph_rtt;
extern Bool graph_tput;
extern Bool graph_tsg;
extern Bool graph_segsize;
extern Bool graph_owin;
extern Bool graph_tline;
extern Bool hex;
extern Bool ignore_non_comp;
extern Bool resolve_ipaddresses;
extern Bool resolve_ports;
extern Bool triple_dupack_allows_data;
extern Bool verify_checksums;
extern Bool print_rtt;
extern Bool print_owin;
extern Bool printbrief;
extern Bool printsuppress;
extern Bool printem;
extern Bool printallofem;
extern Bool printticks;
extern Bool dump_packet_data;
extern Bool warn_ooo;
extern Bool warn_printtrunc;
extern Bool warn_printbadmbz;
extern Bool warn_printhwdups;
extern Bool warn_printbad_syn_fin_seq;
extern Bool show_out_order;
extern Bool show_rexmit;
extern Bool show_zero_window;
extern Bool show_urg;
extern Bool show_sacks;
extern Bool show_rtt_dongles;
extern Bool show_triple_dupack;
extern Bool show_zwnd_probes;
extern Bool use_short_names;
extern Bool save_tcp_data;
extern Bool graph_time_zero;
extern Bool graph_seq_zero;
extern Bool print_seq_zero;
extern Bool graph_zero_len_pkts;
extern Bool plot_tput_instant;
extern Bool filter_output;
extern Bool do_udp;
extern Bool show_title;
extern Bool docheck_hw_dups;
/* constants for real-time (continuous) mode */
extern Bool run_continuously;
extern Bool conn_num_threshold;
extern Bool xplot_all_files;
extern Bool ns_hdrs;
extern u_long remove_live_conn_interval;
extern u_long remove_closed_conn_interval;
extern u_long update_interval;
extern u_long max_conn_num;
extern int debug;
extern int thru_interval;
extern u_long pnum;
/* extended variables with values */
extern char *output_file_dir;
extern char *output_file_prefix;
extern char *xplot_title_prefix;
extern char *xplot_args;
extern u_long ctrunc;
extern timeval current_time;
extern char *output_filename;
/* first and last packet timestamp */
extern timeval first_packet;
extern timeval last_packet;
#define MAX_NAME 20
/* external routine decls */
double sqrt(double x);
void free(void *);
int finite(double);
/* note that many machines have an ether_ntoa, but the output differs, as does
the prototype, so we'll include our own and change the name to avoid conflicts
with local prototypes if they exist and differ */
char *Ether_Ntoa(struct ether_addr *e);
/* global routine decls */
void *MallocZ(int);
void *ReallocZ(void *oldptr, int obytes, int nbytes);
void trace_init(void);
void trace_done(void);
void seglist_init(tcb *);
void printpacket(int, int, void *, int, struct ip *, void *plast, tcb *tcb);
void plotter_vtick(PLOTTER, timeval, u_long);
void plotter_utick(PLOTTER, timeval, u_long);
void plotter_uarrow(PLOTTER, timeval, u_long);
void plotter_tick(PLOTTER, timeval, u_long, char);
void plotter_text(PLOTTER, timeval, u_long, char *, char *);
void plotter_temp_color(PLOTTER, char *color);
void plotter_ltick(PLOTTER, timeval, u_long);
void plotter_rtick(PLOTTER, timeval, u_long);
void plotter_rarrow(PLOTTER, timeval, u_long);
void plotter_plus(PLOTTER, timeval, u_long);
void plotter_perm_color(PLOTTER, char *color);
void plotter_line(PLOTTER, timeval, u_long, timeval, u_long);
void plotter_larrow(PLOTTER, timeval, u_long);
void plotter_htick(PLOTTER, timeval, u_long);
void plotter_dtick(PLOTTER, timeval, u_long);
void plotter_dot(PLOTTER, timeval, u_long);
void plotter_done(void);
void plotter_dline(PLOTTER, timeval, u_long, timeval, u_long);
void plotter_diamond(PLOTTER, timeval, u_long);
void plotter_darrow(PLOTTER, timeval, u_long);
void plotter_box(PLOTTER, timeval, u_long);
void plotter_arrow(PLOTTER, timeval, u_long, char);
void plotter_nothing(PLOTTER, timeval);
void plotter_invisible(PLOTTER, timeval, u_long);
void plotter_switch_axis(PLOTTER, Bool);
void plot_init(void);
tcp_pair *dotrace(struct ip *, struct tcphdr *ptcp, void *plast);
void PrintRawData(char *label, void *pfirst, void *plast, Bool octal);
void PrintRawDataHex(char *label, void *pfirst, void *plast);
void PrintTrace(tcp_pair *);
void UDPPrintTrace(udp_pair *);
void PrintBrief(tcp_pair *);
void UDPPrintBrief(udp_pair *);
void OnlyConn(int);
void IgnoreConn(int);
double elapsed(timeval, timeval);
void tv_sub(struct timeval *plhs, struct timeval rhs);
void tv_add(struct timeval *plhs, struct timeval rhs);
int tv_cmp(struct timeval lhs, struct timeval rhs);
Bool tv_same(struct timeval lhs, struct timeval rhs);
char *elapsed2str(double etime);
int ConnReset(tcp_pair *);
int ConnComplete(tcp_pair *);
u_int SynCount(tcp_pair *ptp);
u_int FinCount(tcp_pair *ptp);
char *ts2ascii(timeval *);
char *ts2ascii_date(timeval *);
char *ServiceName(portnum);
char *HostName(ipaddr);
char *HostAddr(ipaddr);
char *HostLetter(llong);
char *NextHostLetter(void);
char *EndpointName(ipaddr,portnum);
PLOTTER new_plotter(tcb *plast, char *filename, char *title,
char *xlabel, char *ylabel, char *suffix);
int rexmit(tcb *, seqnum, seglen, Bool *);
enum t_ack ack_in(tcb *, seqnum, unsigned tcp_data_length);
void DoThru(tcb *ptcb, int nbytes);
struct mfile *Mfopen(char *fname, char *mode);
void Minit(void);
int Mfileno(MFILE *pmf);
int Mvfprintf(MFILE *pmf, char *format, va_list ap);
int Mfwrite(void *buf, u_long size, u_long nitems, MFILE *pmf);
long Mftell(MFILE *pmf);
int Mfseek(MFILE *pmf, long offset, int ptrname);
int Mfprintf(MFILE *pmf, char *format, ...);
int Mfflush(MFILE *pmf);
int Mfclose(MFILE *pmf);
int Mfpipe(int pipes[2]);
struct tcp_options *ParseOptions(struct tcphdr *ptcp, void *plast);
FILE *CompOpenHeader(char *filename);
FILE *CompOpenFile(char *filename);
void CompCloseFile(char *filename);
void CompFormats(void);
int CompIsCompressed(void);
Bool FileIsStdin(char *filename);
struct tcb *ptp2ptcb(tcp_pair *ptp, struct ip *pip, struct tcphdr *ptcp);
void IP_COPYADDR (ipaddr *toaddr, ipaddr fromaddr);
int IP_SAMEADDR (ipaddr addr1, ipaddr addr2);
void PcapSavePacket(char *filename, struct ip *pip, void *plast);
void StringToArgv(char *buf, int *pargc, char ***pargv);
void CopyAddr(tcp_pair_addrblock *, struct ip *pip,portnum,portnum);
int WhichDir(tcp_pair_addrblock *, tcp_pair_addrblock *);
int SameConn(tcp_pair_addrblock *, tcp_pair_addrblock *, int *);
Bool ip_cksum_valid(struct ip *pip, void *plast);
Bool tcp_cksum_valid(struct ip *pip, struct tcphdr *ptcp, void *plast);
Bool udp_cksum_valid(struct ip *pip, struct udphdr *pudp, void *plast);
ipaddr *str2ipaddr(char *str);
int IPcmp(ipaddr *pipA, ipaddr *pipB);
void ModulesPerOldConn(tcp_pair *ptp);
/* Memory allocation routines with page boundaries */
tcp_pair *MakeTcpPair(void);
void FreeTcpPair(tcp_pair *ptr);
seqspace *MakeSeqspace(void);
void FreeSeqspace(seqspace *ptr);
ptp_snap *MakePtpSnap(void);
void FreePtpSnap(ptp_snap *ptr);
segment *MakeSegment(void);
void FreeSegment(segment *ptr);
quadrant *MakeQuadrant(void);
void FreeQuadrant(quadrant *ptr);
ptp_ptr *MakePtpPtr(void);
void FreePtpPtr(ptp_ptr *ptr);
void freequad(quadrant **);
/* high-level line drawing */
PLINE new_line(PLOTTER pl, char *label, char *color);
void extend_line(PLINE pline, timeval xval, int yval);
/* UDP support routines */
void udptrace_init(void);
void udptrace_done(void);
udp_pair *udpdotrace(struct ip *pip, struct udphdr *pudp, void *plast);
/* filter routines */
void HelpFilter(void);
void ParseFilter(char *expr);
Bool PassesFilter(tcp_pair *ptp);
/* simple string expansion for file names, directories, etc */
char *ExpandFormat(const char *format);
/* TCP flags macros */
#define SYN_SET(ptcp)((ptcp)->th_flags & TH_SYN)
#define FIN_SET(ptcp)((ptcp)->th_flags & TH_FIN)
#define ACK_SET(ptcp)((ptcp)->th_flags & TH_ACK)
#define RESET_SET(ptcp)((ptcp)->th_flags & TH_RST)
#define PUSH_SET(ptcp)((ptcp)->th_flags & TH_PUSH)
#define URGENT_SET(ptcp)((ptcp)->th_flags & TH_URG)
#define FLAG6_SET(ptcp)((ptcp)->th_flags & 0x40)
#define FLAG7_SET(ptcp)((ptcp)->th_flags & 0x80)
/* Changed the following macros to reflect the correct position
of bits as specified in RFC 2481 and draft-ietf-tsvwg-ecn-04.txt */
/*
#define CWR_SET(ptcp) (TH_X2((ptcp)) & TH_CWR)
#define ECN_ECHO_SET(ptcp)(TH_X2((ptcp)) & TH_ECN_ECHO)
*/
#define CWR_SET(ptcp) (TH_FLAGS((ptcp)) & TH_CWR)
#define ECN_ECHO_SET(ptcp) (TH_FLAGS((ptcp)) & TH_ECN_ECHO)
/* connection directions */
#define A2B 1
#define B2A -1
/*macros for maintaining the seqspace used for rexmit*/
#define QUADSIZE (0x40000000)
#define QUADNUM(seq) ((seq>>30)+1)
#define IN_Q1(seq) (QUADNUM(seq)==1)
#define IN_Q2(seq) (QUADNUM(seq)==2)
#define IN_Q3(seq) (QUADNUM(seq)==3)
#define IN_Q4(seq) (QUADNUM(seq)==4)
#define FIRST_SEQ(quadnum) (QUADSIZE*(quadnum-1))
#define LAST_SEQ(quadnum) ((QUADSIZE*quadnum)-1) /* bug fix by Priya */
#define BOUNDARY(beg,fin) (QUADNUM((beg)) != QUADNUM((fin)))
/* physical layers currently understood */
#define PHYS_ETHER 1
#define PHYS_FDDI 2
/*
* SEQCMP - sequence space comparator
* This handles sequence space wrap-around. Overlow/Underflow makes
* the result below correct ( -, 0, + ) for any a, b in the sequence
* space. Results: result implies
* - a < b
* 0 a = b
* + a > b
*/
#define SEQCMP(a, b) ((long)(a) - (long)(b))
#define SEQ_LESSTHAN(a, b) (SEQCMP(a,b) < 0)
#define SEQ_GREATERTHAN(a, b) (SEQCMP(a,b) > 0)
/* SACK TCP options (not an RFC yet, mostly from draft and RFC 1072) */
/* I'm assuming, for now, that the draft version is correct */
/* sdo -- Tue Aug 20, 1996 */
#define TCPOPT_SACK_PERM 4 /* sack-permitted option */
#define TCPOPT_SACK 5 /* sack attached option */
#define MAX_SACKS 10 /* max number of sacks per segment (rfc1072) */
typedef struct sack_block {
seqnum sack_left; /* left edge */
seqnum sack_right; /* right edge */
} sack_block;
#define MAX_UNKNOWN 16
typedef struct opt_unknown {
u_char unkn_opt;
u_char unkn_len;
} opt_unknown;
/* RFC 1323 TCP options (not usually in tcp.h yet) */
#define TCPOPT_WS 3 /* window scaling */
#define TCPOPT_TS 8 /* timestamp */
/* other options... */
#define TCPOPT_ECHO 6 /* echo (rfc1072) */
#define TCPOPT_ECHOREPLY 7 /* echo (rfc1072) */
#define TCPOPT_TIMESTAMP 8 /* timestamps (rfc1323) */
#define TCPOPT_CC 11 /* T/TCP CC options (rfc1644) */
#define TCPOPT_CCNEW 12 /* T/TCP CC options (rfc1644) */
#define TCPOPT_CCECHO 13 /* T/TCP CC options (rfc1644) */
/* RFC 2481 (ECN) IP and TCP flags (not usually defined yet) */
#define IPTOS_ECT 0x02 /* ECN-Capable Transport */
#define IPTOS_CE 0x01 /* Experienced Congestion */
// Modified the following macros to reflect the
// correct bit positions for CWR and ECE as specified in
// RFC 2481 and the latest draft: draft-ietf-tsvwg-ecn-04.txt.
// The bits CWR and ECE are actually the most significant
// bits in the TCP flags octet respectively.
/*#define TH_ECN_ECHO 0x02 */ /* Used by receiver to echo CE bit */
/*#define TH_CWR 0x01 */ /* Congestion Window Reduced */
#define TH_CWR 0x80 /* Used by sender to indicate congestion
window size reduction. */
#define TH_ECN_ECHO 0x40 /* Used by receiver to echo CE bit. */
/* some compilers seem to want to make "char" unsigned by default, */
/* which is breaking stuff. Rather than introduce (more) ugly */
/* machine dependencies, I'm going to FORCE some chars to be */
/* signed... */
typedef signed char s_char;
struct tcp_options {
short mss; /* maximum segment size */
s_char ws; /* window scale (1323) */
long tsval; /* Time Stamp Val (1323) */
long tsecr; /* Time Stamp Echo Reply (1323) */
Bool sack_req; /* sacks requested */
s_char sack_count; /* sack count in this packet */
sack_block sacks[MAX_SACKS]; /* sack blocks */
/* echo request and reply */
/* assume that value of -1 means unused (?) */
u_long echo_req;
u_long echo_repl;
/* T/TCP stuff */
/* assume that value of -1 means unused (?) */
u_long cc;
u_long ccnew;
u_long ccecho;
/* record the stuff we don't understand, too */
char unknown_count; /* number of unknown options */
opt_unknown unknowns[MAX_UNKNOWN]; /* unknown options */
};
/*
* File extensions to use
*
*/
#define RTT_DUMP_FILE_EXTENSION "_rttraw.dat"
#define RTT_GRAPH_FILE_EXTENSION "_rtt.xpl"
#define PLOT_FILE_EXTENSION "_tsg.xpl"
#define SEGSIZE_FILE_EXTENSION "_ssize.xpl"
#define OWIN_FILE_EXTENSION "_owin.xpl"
#define TLINE_FILE_EXTENSION "_tline.xpl"
#define THROUGHPUT_FILE_EXTENSION "_tput.xpl"
#define CONTENTS_FILE_EXTENSION "_contents.dat"
/* name of file to store filtered output into */
#define PASS_FILTER_FILENAME "PF"
/* name of the resource file */
#define TCPTRACE_RC_FILE ".tcptracerc"