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flstats.c
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/*
* Copyright (c) 1996
* Ipsilon Networks, Inc.
*
* please see terms and conditions of copyright at the end of this file
*/
/*
* output flow statistics from a tcpdump file.
*
*/
static char *flstats_c_rcsid = "$Id$";
#include "config.h"
#define _GNU_SOURCE /* needed for asprintf(3) */
#if defined(HAVE_ERRNO_H)
/* http://blog.nirkabel.org/2009/01/18/errnoh-problem/comment-page-1/ */
#include <errno.h>
#endif /* defined(HAVE_ERRNO_H) */
#include <signal.h>
#if !defined(HAVE_ASPRINTF)
#include <stdarg.h>
#endif /* !defined(HAVE_ASPRINTF) */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <pcap.h>
#include <tcl.h>
#include "flstats.h"
/* global variables */
u_char protohasports[256];
u_short Ipv4type = 0x800;
u_short IPv6type = 0x86dd;
int fileeof = 0;
int filetype = 0;
flowentry_p buckets[31979];
flowentry_p onebehinds[NUM(buckets)];
flowentry_p table; /* list of everything */
flowentry_p table_last; /* last of everything */
flowentry_p flow_enum_state;
struct timeval curtime, starttime;
struct timeval ZERO = { 0, 0 };
ri_t ri; /* reporting interval structure */
/*
* delta time reporting:
*
* (BOT == beginning of trace run; RI == reporting interval)
*
* absolute: absolute time (secs.usecs since epoch)
* within_tr: BOT relative time (secs.usecs since BOT)
* within_ri: RI relative time (secs.usecs within RI)
*
* (note that "within_ri" does *not* make sense for reporting the
* start time of the RI itself; delta_ri.delta can *only* be
* 'absolute' or 'within_tr')
*
* then, secs.usecs? or, just secs?
*/
typedef enum { absolute, within_tr, within_ri, invalid } delta_t;
delta_t delta_wi, delta_ri;
int binsecs = 0; /* number of seconds in a bin */
/* XXX any bounds checking from upper level (Tcl) calls? */
ftinfo_t ftinfo[10]; /* number of distinct flow types in use */
llcl_t llclasses[NUM(ftinfo)];
/*
* application defined "classes". Class[0] is special, in that
* it gets any counts not tied to any other flow type or flow.
*/
/* XXX any bounds checking from upper level (Tcl) calls? */
class_t classes[NUM(ftinfo)];
class_p class_enum_state;
int flow_types = 0;
pcap_t *pcap_descriptor;
int pcap_dlt, /* data link type of input file */
pcap_snap; /* snap length of input file */
pcap_handler pcap_receiver;
char pcap_errbuf[PCAP_ERRBUF_SIZE];
/* FDDI stuff */
/*
* This is a place where pcap is a bit messed up (should be two DLTs).
*/
#if defined(ultrix) || defined(__alpha)
#define FDDIPAD 3
#else
#define FDDIPAD 0
#endif
int fddipad = FDDIPAD;
int packet_error = 0;
int pending, pendingcaplen, pendingpktlen, pending_maxpktlen;
u_char *pending_packet, *pktbuffer;;
flowentry_t timers[150];
u_long pktcount, signalled, lastsignalled;
char *args, /* arguments... */
argcount[200]; /* number of them */
char fl_tclprogram[] =
#include "flstats.char"
;
/*
* signal handling
*/
static void
gotsignal(int which)
{
signalled++;
}
/*
* forward declarations
*/
static void delete_flow(flowentry_p fe);
/*
* return the microseconds from a struct timeval
*/
static long
tvusecs(suseconds_t su_usecs)
{
long usecs = su_usecs;
return usecs;
}
/*
* return the correct secs (based on delta_wi) for a timeval
*/
static long
dtsecs(struct timeval *tv, delta_t delta)
{
switch (delta) {
case absolute:
return tv->tv_sec;
case within_tr:
return TIMEDIFFSECS(tv, &starttime);
case within_ri:
return TIMEDIFFSECS(tv, &ri.ri_starttime);
default:
fprintf(stderr, "%s:%d: delta parameter, invalid value\n",
__FILE__, __LINE__);
exit(1);
/*NOTREACHED*/
}
}
/*
* return the correct usecs (based on delta_wi) for a timeval
*/
static long
dtusecs(struct timeval *tv, delta_t delta) {
switch (delta) {
case absolute:
return tvusecs(tv->tv_usec);
case within_tr:
return tvusecs(TIMEDIFFUSECS(tv, &starttime));
case within_ri:
return tvusecs(TIMEDIFFUSECS(tv, &ri.ri_starttime));
default:
fprintf(stderr, "%s:%d: delta parameter, invalid value\n",
__FILE__, __LINE__);
exit(1);
/*NOTREACHED*/
}
}
static long
dtsecs_wi(struct timeval *tv)
{
return dtsecs(tv, delta_wi);
}
static long
dtsecs_ri(struct timeval *tv)
{
return dtsecs(tv, delta_ri);
}
static long
dtusecs_wi(struct timeval *tv)
{
return dtusecs(tv, delta_wi);
}
static long
dtusecs_ri(struct timeval *tv)
{
return dtusecs(tv, delta_ri);
}
/*
* save a string
*/
char *
strsave(const char *s)
{
int n = strlen(s);
char *new;
new = (char *) malloc(n+1);
if (new) {
strncpy(new, s, n+1);
}
return new;
}
/*
* save some bytes
*/
u_char *
u_char_save(const u_char *u, int len)
{
u_char *new;
new = (u_char *) malloc(len);
if (new) {
memcpy(new, u, len);
}
return new;
}
#if !defined(HAVE_ASPRINTF)
/*
* slow, but simple (hopefully, almost *never* needed)
*/
static int
asprintf(char **where, const char *format, ...) {
va_list ap;
char foo[1]; /* used in determining the correct size */
char *place;
int len; /* */
va_start(ap, format);
/* this first call does no real printing, just determines size */
len = vsnprintf(foo, 0, format, ap);
place = malloc(len);
if (place == 0) {
*where = 0;
return -1; /* see man page for asprintf(3) */
}
vsnprintf(place, len, format, ap);
*where = place;
return len;
}
#endif /* !defined(HAVE_ASPRINTF) */
/*
* delete a string returned from asprintf(3)
* (in a way that makes Tcl_SetResult(3) happy, sigh)
*/
static void
tclasfree(char *tofree)
{
free(tofree);
}
/*
* identify a packet for an error message
*/
char *
pktloc()
{
static char loc[100];
sprintf(loc, "%ld", pktcount);
return loc;
}
/*
* a new file is being opened, so clean up from the last one.
*/
static int
newfile(Tcl_Interp *interp, int maxpktlen)
{
flowentry_p fe, nfe;
class_p cl;
extern int errno;
char *asret;
fileeof = 0;
flow_enum_state = 0;
class_enum_state = 0;
switch (filetype) {
case TYPE_PCAP:
if (pcap_descriptor != 0) {
pcap_close(pcap_descriptor);
pcap_descriptor = 0;
}
break;
case TYPE_UNKNOWN:
/* nothing to do */
break;
default:
asprintf(&asret, "%s.%d: filetype %d unknown!\n",
__FILE__, __LINE__, filetype);
Tcl_SetResult(interp, asret, tclasfree);
return TCL_ERROR;
}
filetype = TYPE_UNKNOWN; /* go into neutral... */
memset(&classes[0], 0, sizeof classes);
for (cl = &classes[0]; cl < &classes[NUM(classes)]; cl++) {
cl->cls_last_bin_active = 0xffffffff;
}
curtime = ZERO;
starttime = ZERO;
pending = 0;
for (fe = table; fe; fe = nfe) {
nfe = fe->fe_next_in_table;
free(fe);
}
table = table_last = 0;
memset(buckets, 0, sizeof buckets);
memset(onebehinds, 0, sizeof onebehinds);
/* if pending buffer is already set, free it */
if (pending_packet) {
free(pending_packet);
pending_packet = 0; /* empty the water bucket */
pending_maxpktlen = 0;
}
/* allocate packet for pending buffer */
pending_packet = malloc(maxpktlen); /* room for packet */
if (pending_packet == 0) {
asprintf(&asret, "no room for %d-byte packet buffer", maxpktlen);
Tcl_SetResult(interp, asret, tclasfree);
return TCL_ERROR;
}
pending_maxpktlen = maxpktlen; /* remember size of buffer */
/* if we've already allocated a packet buffer, free it */
if (pktbuffer) {
free(pktbuffer);
pktbuffer = 0;
}
pktbuffer = malloc(maxpktlen); /* room for alignment */
if (pktbuffer == 0) {
asprintf(&asret, "no room for %d-byte packet buffer", maxpktlen);
Tcl_SetResult(interp, asret, tclasfree);
return TCL_ERROR;
}
return TCL_OK;
}
/*
* Compute a checksum on a contiguous area of storage
*
* This is tailored to doing quite short data structures,
* in particular, flow ids.
*/
static u_short
cksum(u_char *p, int len)
{
int shorts = len/2;
u_long sum = 0;
while (shorts > 4) {
/* 0*/ sum += PICKUP_NETSHORT(p); p += 2; sum += PICKUP_NETSHORT(p); p += 2;
/* 2*/ sum += PICKUP_NETSHORT(p); p += 2; sum += PICKUP_NETSHORT(p); p += 2;
/* 4*/ shorts -= 4;
}
while (shorts > 0) {
sum += PICKUP_NETSHORT(p);
p += 2;
shorts--;
}
if (len&1) {
sum += p[0]<<8;
}
/*
* Reduce
*
* 0xffff + 0xffff = 0x1fffe. So,
*/
sum = (sum&0xffff)+((sum>>16)&0xffff);
sum = (sum&0xffff)+((sum>>16)&0xffff); /* That's enough */
return (u_short) (~htons(sum))&0xffff;
}
static char *
flow_type_to_string(u_char *type_indices, int len)
{
static char result[MAX_FLOW_ID_BYTES*10];
char *sep = "";
atoft_p xp;
int i;
result[0] = 0;
for (i = 0; i < len; i++) {
xp = &atoft[type_indices[i]];
sprintf(result+strlen(result), "%s%s", sep, xp->name);
sep = "/";
}
return result;
}
static char *
flow_id_to_string(ftinfo_p ft, u_char *id)
{
static char result[MAX_FLOW_ID_BYTES*10];
char fidstring[30], *fidp;
char *sep = "", *dot, *fmt0xff, *fmt0xf;
atoft_p xp;
u_long decimal;
int i, firstbit, numbits, lastbit;
u_long byte;
result[0] = 0;
for (i = 0; i < ft->fti_type_indices_len; i++) {
xp = &atoft[ft->fti_type_indices[i]];
fidp = fidstring;
dot = ""; /* for dotted decimal */
decimal = 0; /* for decimal */
switch (xp->fmt) {
case FMT_DECIMAL:
break; /* done in for loop (sigh) */
case FMT_DOTTED:
fmt0xff = "%s%d";
fmt0xf = "%s%d";
break;
case FMT_HEX:
fmt0xff = "%s%02x";
fmt0xf = "%s%x";
break;
default:
fprintf(stderr, "%s:%d: %d is bad fmt\n",
__FILE__, __LINE__, xp->fmt);
break;
}
firstbit = xp->firstbit;
numbits = xp->numbits;
while (numbits > 0) {
byte = *id++;
lastbit = (firstbit+numbits) > 8 ? 7 : firstbit+numbits-1;
if (firstbit > 0) {
byte = (byte<<(firstbit+24))>>(firstbit+24);
}
if (lastbit < 7) {
byte = (byte>>(7-lastbit))<<(7-lastbit);
}
if (xp->fmt == FMT_DECIMAL) {
decimal = (decimal<<(lastbit-firstbit+1))+(byte>>(7-lastbit));
} else {
if (firstbit < 4) {
sprintf(fidp, fmt0xff, dot, byte);
} else {
sprintf(fidp, fmt0xf, dot, byte);
}
fidp += strlen(fidp);
}
numbits -= (8-firstbit);
firstbit = 0;
if (xp->fmt == FMT_DOTTED) {
dot = ".";
}
}
if (xp->fmt == FMT_DECIMAL) {
sprintf(fidstring, "%ld", decimal);
} else {
*fidp = 0;
}
sprintf(result+strlen(result), "%s%s", sep, fidstring);
sep = "/";
}
return result;
}
/*
* formats for reporting flow, class statistics. these can be read,
* and modified, by the scripting language
*/
static char *flow_stats_template =
"class %d type %s id %s pkts %lu bytes "
"%lu sipg %lu.%06lu created %ld.%06ld last %ld.%06ld",
*flow_stats_format;
static char *
flow_statistics(flowentry_p fe)
{
static char summary[2000];
ftinfo_p ft = &ftinfo[fe->fe_flow_type];
sprintf(summary, flow_stats_format,
fe->fe_class,
flow_type_to_string(ft->fti_type_indices, ft->fti_type_indices_len),
flow_id_to_string(ft, fe->fe_id),
fe->fe_pkts-fe->fe_pkts_last_enum, fe->fe_bytes-fe->fe_bytes_last_enum,
SIPG_TO_SECS(fe->fe_sipg), SIPG_TO_USECS(fe->fe_sipg),
dtsecs_ri(&fe->fe_created), dtusecs_ri(&fe->fe_created),
dtsecs_ri(&fe->fe_last_pkt_rcvd), dtusecs_ri(&fe->fe_last_pkt_rcvd));
return summary;
}
static char *class_stats_template =
"class %d type %s created %lu deleted %lu added %lu removed %lu "
"active %lu pkts %lu bytes %lu sipg %lu.%06lu "
"lastrecv %ld.%06ld",
*class_stats_format;
static char *
class_statistics(class_p clsp)
{
static char summary[10000];
sprintf(summary, class_stats_format,
clsp-classes,
flow_type_to_string(clsp->cls_type_indices, clsp->cls_type_indices_len),
clsp->cls_ri.cls_ri_created, clsp->cls_ri.cls_ri_deleted,
clsp->cls_ri.cls_ri_added, clsp->cls_ri.cls_ri_removed, clsp->cls_ri.cls_ri_active,
clsp->cls_ri.cls_ri_pkts, clsp->cls_ri.cls_ri_bytes,
SIPG_TO_SECS(clsp->cls_sipg), SIPG_TO_USECS(clsp->cls_sipg),
dtsecs_ri(&clsp->cls_last_pkt_rcvd),
dtusecs_ri(&clsp->cls_last_pkt_rcvd));
return summary;
}
static char *ri_stats_template =
"binno %lu ri_start %ld.%06ld ri_end %ld.%06ld "
"ri_firstpkt %ld.%06ld ri_lastpkt %ld.%06ld "
"ri_pkts %lu ri_bytes %lu "
"ri_tsipg %lu.%06lu ri_isipg %lu.%06lu "
"ipv6pkts %lu ipv6bytes %lu "
"nonippkts %lu nonipbytes %lu "
"unclpkts %lu unclbytes %lu "
"fragpkts %lu fragbytes %lu toosmallpkts %lu toosmallbytes %lu "
"runtpkts %lu runtbytes %lu noportpkts %lu noportbytes %lu",
*ri_stats_format;
static char *
ri_statistics() {
char *asret;
/*
* note: only ri_stime uses delta_ri; everything can be
* relative to it
*/
asprintf(&asret, ri_stats_format,
ri.ri_binno,
dtsecs_ri(&ri.ri_starttime), dtusecs_ri(&ri.ri_starttime),
dtsecs_wi(&ri.ri_endtime), dtusecs_wi(&ri.ri_endtime),
dtsecs_wi(&ri.ri_first_pkt_rcvd), dtusecs_wi(&ri.ri_first_pkt_rcvd),
dtsecs_wi(&ri.ri_last_pkt_rcvd), dtusecs_wi(&ri.ri_last_pkt_rcvd),
ri.ri_pkts, ri.ri_bytes,
SIPG_TO_SECS(ri.ri_isipg), SIPG_TO_USECS(ri.ri_isipg),
SIPG_TO_SECS(ri.ri_tsipg), SIPG_TO_USECS(ri.ri_tsipg),
ri.ri_ipv6pkts, ri.ri_ipv6bytes,
ri.ri_nonippkts, ri.ri_nonipbytes,
ri.ri_unclpkts, ri.ri_unclbytes,
ri.ri_fragpkts, ri.ri_fragbytes,
ri.ri_toosmallpkts, ri.ri_toosmallbytes,
ri.ri_runtpkts, ri.ri_runtbytes,
ri.ri_noportpkts, ri.ri_noportbytes);
return asret;
}
/*
* arrange for something to run shortly after "timertime"
*/
static void
timer_insert(flowentry_p fe, struct timeval *timertime)
{
flowentry_p timer = &timers[timertime->tv_sec%NUM(timers)];
timer->fe_prev_in_timer->fe_next_in_timer = fe;
fe->fe_prev_in_timer = timer->fe_prev_in_timer;
timer->fe_prev_in_timer = fe;
fe->fe_next_in_timer = timer;
}
static void
timer_remove(flowentry_p fe)
{
if (fe->fe_prev_in_timer) {
fe->fe_prev_in_timer->fe_next_in_timer = fe->fe_next_in_timer;
fe->fe_next_in_timer->fe_prev_in_timer = fe->fe_prev_in_timer;
}
}
static flowentry_p
timer_get_slot()
{
flowentry_p timer = &timers[curtime.tv_sec%NUM(timers)];
flowentry_p slot = timer->fe_next_in_timer;
if (slot == timer->fe_prev_in_timer) {
return 0; /* nothing */
}
/* keep ends from dangling */
slot->fe_prev_in_timer = 0;
timer->fe_prev_in_timer->fe_next_in_timer = 0;
/* point to self */
timer->fe_next_in_timer = timer;
timer->fe_prev_in_timer = timer;
return slot;
}
static void
do_timers(Tcl_Interp *interp)
{
flowentry_p nfe, fe;
ftinfo_p fti;
char buf[100];
int n;
long usecs;
nfe = timer_get_slot();
while ((fe = nfe) != 0) {
nfe = fe->fe_next_in_timer;
fe->fe_next_in_timer = fe->fe_prev_in_timer = 0;
if (TIME_LT(&fe->fe_timer_time, &curtime)) {
fti = &ftinfo[fe->fe_flow_type];
if ((fti->fti_timer_upcall == 0) ||
TIME_EQ(&fe->fe_timer_time, &ZERO)) {
continue; /* maybe flow type changed? */
}
/*
* call: "timer_upcall timesecs.usecs FLOW flowstats"
* result: "command secs.usecs"
*
* XXX should this follow -D flag?
*/
sprintf(buf, " %ld.%06ld ", curtime.tv_sec, tvusecs(curtime.tv_usec));
if (Tcl_VarEval(interp,
ftinfo[fe->fe_flow_type].fti_timer_upcall, buf,
" FLOW ", flow_statistics(fe), 0) != TCL_OK) {
packet_error = TCL_ERROR;
return;
}
fe->fe_timer_time.tv_usec = 0;
n = sscanf(Tcl_GetStringResult(interp), "%s %ld.%ld",
buf, &fe->fe_timer_time.tv_sec,
&usecs);
fe->fe_timer_time.tv_usec = usecs;
if ((n >= 1) && !strcmp(buf, "DELETE")) {
delete_flow(fe);
} else if (n >= 2) {
if (!TIME_EQ(&fe->fe_timer_time, &ZERO)) {
TIME_ADD(&fe->fe_timer_time,
&fe->fe_timer_time, &curtime);
timer_insert(fe, &fe->fe_timer_time);
}
}
} else {
timer_insert(fe, &fe->fe_timer_time);
}
}
}
static void
set_time(Tcl_Interp *interp, long sec, long usec)
{
struct timeval now;
char *asret;
now.tv_sec = sec;
now.tv_usec = usec;
if (TIME_LT(&now, &ZERO)) {
asprintf(&asret,
"[%s] bad trace file format -- negative time in packet",
pktloc());
Tcl_SetResult(interp, asret, tclasfree);
packet_error = TCL_ERROR;
return;
}
if (TIME_EQ(&ri.ri_starttime, &ZERO)) {
ri.ri_starttime = now;
}
ri.ri_endtime = now;
if (TIME_EQ(&starttime, &ZERO)) {
starttime = now;
curtime = now;
} else {
if (TIME_LT(&now, &curtime)) {
#if 0
/*
* OK. Vern's tcpslice(1) doesn't worry about this (but, like this
* #if 0, just doesn't update time for a while). hmm '
*/
sprintf(interp->result,
"[%s] bad trace file format -- time goes backwards",
pktloc());
packet_error = TCL_ERROR;
#endif /* 0 */
return;
}
/* call timers once per second */
while (curtime.tv_sec != now.tv_sec) {
do_timers(interp);
curtime.tv_sec++; /* advance the time */
}
curtime.tv_usec = now.tv_usec;
if (TIME_EQ(&ri.ri_starttime, &ZERO)) {
ri.ri_starttime = curtime;
}
}
if (ri.ri_binno == -1) {
ri.ri_binno = NOW_AS_BINNO();
}
}
/* table lookup */
static flowentry_p
tbl_lookup(u_char *id, ftinfo_p ft)
{
int id_len = ft->fti_id_len;
int type_index = ft-ftinfo;
u_short sum = cksum(id, id_len);
flowentry_p fe = buckets[sum%NUM(buckets)];
flowentry_p onebehind = onebehinds[sum%NUM(onebehinds)];
#define MATCH(id,len,sum,type_index,p) \
((sum == (p)->fe_sum) && (type_index == (p)->fe_flow_type) && \
(len == (p)->fe_id_len) && !memcmp(id, (p)->fe_id, len))
if (onebehind && MATCH(id, id_len, sum, type_index, onebehind)) {
return onebehind;
}
while (fe) {
if (MATCH(id, id_len, sum, type_index, fe)) {
onebehinds[sum%NUM(onebehinds)] = fe;
break;
}
fe = fe->fe_next_in_bucket;
}
return fe;
}
static flowentry_p
tbl_add(u_char *id, int id_len)
{
u_short sum = cksum(id, id_len);
flowentry_p *hbucket = &buckets[sum%NUM(buckets)];
flowentry_p fe;
fe = (flowentry_p) malloc(sizeof *fe+id_len-1);
if (fe == 0) {
return 0;
}
memset(fe, 0, sizeof *fe);
fe->fe_sum = sum;
fe->fe_id_len = id_len;
fe->fe_id = u_char_save(id, id_len);
fe->fe_next_in_bucket = *hbucket;
if (fe->fe_next_in_bucket) {
fe->fe_next_in_bucket->fe_prev_in_bucket = fe;
}
fe->fe_prev_in_bucket = 0;
*hbucket = fe;
fe->fe_next_in_table = 0;
fe->fe_prev_in_table = table_last;
if (table_last) {
table_last->fe_next_in_table = fe;
} else {
table = fe;
}
table_last = fe;
fe->fe_next_in_timer = fe->fe_prev_in_timer = 0;
return fe;
}
static void
tbl_delete(flowentry_p fe)
{
u_short sum = cksum(fe->fe_id, fe->fe_id_len);
flowentry_p *hbucket = &buckets[sum%NUM(buckets)];
flowentry_p *honebehind = &onebehinds[sum%NUM(onebehinds)];
/* dequeue the silly thing... */
/* out of timer */
if (fe->fe_prev_in_timer) {
timer_remove(fe);
}
/* out of bucket */
if (fe->fe_prev_in_bucket) {
fe->fe_prev_in_bucket->fe_next_in_bucket = fe->fe_next_in_bucket;
} else {
*hbucket = fe->fe_next_in_bucket;
}
if (fe->fe_next_in_bucket) {
fe->fe_next_in_bucket->fe_prev_in_bucket = fe->fe_prev_in_bucket;
}
if (*honebehind == fe) {
*honebehind = *hbucket;
}
/* out of table */
if (fe->fe_prev_in_table) {
fe->fe_prev_in_table->fe_next_in_table = fe->fe_next_in_table;
} else {
table = fe->fe_next_in_table;
}
if (fe->fe_next_in_table) {
fe->fe_next_in_table->fe_prev_in_table = fe->fe_prev_in_table;
} else {
table_last = fe->fe_prev_in_table;
}
free(fe->fe_id); /* free up id */
free(fe);
}
static void
delete_flow(flowentry_p fe)
{
classes[fe->fe_class].cls_ri.cls_ri_deleted++;
classes[fe->fe_class].cls_last_bin_active = ri.ri_binno;
tbl_delete(fe);
}
/* main thing: name this class */
static void
new_flow_in_class(u_short class, flowentry_p fe, ftinfo_p ft)
{
class_p cls;
if (fe->fe_class >= NUM(classes)) {
fprintf(stderr, "%s:%d: assertion failure\n", __FILE__, __LINE__);
exit(2);
}
cls = &classes[fe->fe_class];
if (ft->fti_type_indices_len > sizeof(cls->cls_type_indices)) {
fprintf(stderr, "%s:%d: assertion failure\n", __FILE__, __LINE__);
exit(2);
}
if (cls->cls_type_indices_len == 0) { /* never initialized */
memcpy(cls->cls_type_indices, ft->fti_type_indices,
ft->fti_type_indices_len);
cls->cls_type_indices_len = ft->fti_type_indices_len;
} else if ((ft->fti_type_indices_len != cls->cls_type_indices_len) ||
(memcmp(ft->fti_type_indices, cls->cls_type_indices,
cls->cls_type_indices_len))) { /* our previous value doesn't match */
/* now what? */
fprintf(stderr, "%s:%d: new_flow_in_class got a *different* value\n",
__FILE__, __LINE__);
}
}
static flowentry_p
new_flow(Tcl_Interp *interp, ftinfo_p ft, u_char *flowid, int class)
{
flowentry_p fe;
fe = tbl_add(flowid, ft->fti_id_len);
if (fe == 0) {
return 0;
}
fe->fe_flow_type = ft-ftinfo;
fe->fe_parent_ftype = ft->fti_parent_ftype; /* default */
fe->fe_parent_class = ftinfo[ft->fti_parent_ftype].fti_class;/* default */
fe->fe_class = class;
new_flow_in_class(class, fe, ft);
fe->fe_last_bin_active = 0xffffffff;
fe->fe_created = curtime;
fe->fe_last_pkt_rcvd = ZERO;
/*
* now, if there is a "new flow" callout registered in this
* flow type, call it.
*
* the callout is allowed to change certain parameters of
* this flow entry: the class, the parent flow type,
* the recv_upcall and parameters, and the timer_upcall
* and parameters.
*/
if (ft->fti_new_flow_upcall) {
int n;
u_long sipgsecs, sipgusecs;
long usecs1, usecs2;
char buf[1000];
sprintf(buf, " %d %ld ", fe->fe_class, ft-ftinfo);
if (Tcl_VarEval(interp, ft->fti_new_flow_upcall,
buf, flow_type_to_string(ft->fti_type_indices,
ft->fti_type_indices_len),
" ", flow_id_to_string(ft, fe->fe_id), 0) != TCL_OK) {
packet_error = TCL_ERROR;
return 0;
}
fe->fe_upcall_when_secs_ge.tv_usec = 0;
fe->fe_timer_time.tv_usec = 0;
sipgusecs = 0;
n = sscanf(Tcl_GetStringResult(interp),
"%hd %hd %hd %ld.%ld %ld %lu.%lu %ld.%ld",