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fake_event.c
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/*
* testcode/fake_event.c - fake event handling that replays existing scenario.
*
* Copyright (c) 2007, NLnet Labs. All rights reserved.
*
* This software is open source.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the NLNET LABS nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \file
* Event service that replays a scenario.
* This implements the same exported symbols as the files:
* util/netevent.c
* services/listen_dnsport.c
* services/outside_network.c
* But these do not actually access the network or events, instead
* the scenario is played.
*/
#include "config.h"
#include "testcode/fake_event.h"
#include "util/netevent.h"
#include "util/net_help.h"
#include "util/data/msgparse.h"
#include "util/data/msgreply.h"
#include "util/data/msgencode.h"
#include "util/data/dname.h"
#include "util/config_file.h"
#include "services/listen_dnsport.h"
#include "services/outside_network.h"
#include "services/cache/infra.h"
#include "testcode/replay.h"
#include "testcode/testpkts.h"
#include "util/log.h"
#include "util/fptr_wlist.h"
#include "sldns/sbuffer.h"
#include "sldns/wire2str.h"
#include "sldns/str2wire.h"
#include <signal.h>
struct worker;
struct daemon_remote;
/** Global variable: the scenario. Saved here for when event_init is done. */
static struct replay_scenario* saved_scenario = NULL;
/** add timers and the values do not overflow or become negative */
static void
timeval_add(struct timeval* d, const struct timeval* add)
{
#ifndef S_SPLINT_S
d->tv_sec += add->tv_sec;
d->tv_usec += add->tv_usec;
if(d->tv_usec > 1000000) {
d->tv_usec -= 1000000;
d->tv_sec++;
}
#endif
}
void
fake_temp_file(const char* adj, const char* id, char* buf, size_t len)
{
#ifdef USE_WINSOCK
snprintf(buf, len, "testbound_%u%s%s.tmp",
(unsigned)getpid(), adj, id);
#else
snprintf(buf, len, "/tmp/testbound_%u%s%s.tmp",
(unsigned)getpid(), adj, id);
#endif
}
void
fake_event_init(struct replay_scenario* scen)
{
saved_scenario = scen;
}
void
fake_event_cleanup(void)
{
replay_scenario_delete(saved_scenario);
saved_scenario = NULL;
}
/** helper function that logs a sldns_pkt packet to logfile */
static void
log_pkt(const char* desc, uint8_t* pkt, size_t len)
{
char* str = sldns_wire2str_pkt(pkt, len);
if(!str)
fatal_exit("%s: (failed out of memory wire2str_pkt)", desc);
else {
log_info("%s%s", desc, str);
free(str);
}
}
/**
* Returns a string describing the event type.
*/
static const char*
repevt_string(enum replay_event_type t)
{
switch(t) {
case repevt_nothing: return "NOTHING";
case repevt_front_query: return "QUERY";
case repevt_front_reply: return "CHECK_ANSWER";
case repevt_timeout: return "TIMEOUT";
case repevt_time_passes: return "TIME_PASSES";
case repevt_back_reply: return "REPLY";
case repevt_back_query: return "CHECK_OUT_QUERY";
case repevt_autotrust_check: return "CHECK_AUTOTRUST";
case repevt_error: return "ERROR";
case repevt_assign: return "ASSIGN";
case repevt_traffic: return "TRAFFIC";
case repevt_infra_rtt: return "INFRA_RTT";
default: return "UNKNOWN";
}
}
/** delete a fake pending */
static void
delete_fake_pending(struct fake_pending* pend)
{
if(!pend)
return;
free(pend->zone);
sldns_buffer_free(pend->buffer);
free(pend->pkt);
free(pend);
}
/** delete a replay answer */
static void
delete_replay_answer(struct replay_answer* a)
{
if(!a)
return;
if(a->repinfo.c) {
sldns_buffer_free(a->repinfo.c->buffer);
free(a->repinfo.c);
}
free(a->pkt);
free(a);
}
/**
* return: true if pending query matches the now event.
*/
static int
pending_matches_current(struct replay_runtime* runtime,
struct entry** entry, struct fake_pending **pend)
{
struct fake_pending* p;
struct entry* e;
if(!runtime->now || runtime->now->evt_type != repevt_back_query
|| !runtime->pending_list)
return 0;
/* see if any of the pending queries matches */
for(p = runtime->pending_list; p; p = p->next) {
if(runtime->now->addrlen != 0 &&
sockaddr_cmp(&p->addr, p->addrlen, &runtime->now->addr,
runtime->now->addrlen) != 0)
continue;
if((e=find_match(runtime->now->match, p->pkt, p->pkt_len,
p->transport))) {
*entry = e;
*pend = p;
return 1;
}
}
return 0;
}
/**
* Find the range that matches this pending message.
* @param runtime: runtime with current moment, and range list.
* @param entry: returns the pointer to entry that matches.
* @param pend: the pending that the entry must match.
* @return: true if a match is found.
*/
static int
pending_find_match(struct replay_runtime* runtime, struct entry** entry,
struct fake_pending* pend)
{
int timenow = runtime->now->time_step;
struct replay_range* p = runtime->scenario->range_list;
while(p) {
if(p->start_step <= timenow && timenow <= p->end_step &&
(p->addrlen == 0 || sockaddr_cmp(&p->addr, p->addrlen,
&pend->addr, pend->addrlen) == 0) &&
(*entry = find_match(p->match, pend->pkt, pend->pkt_len,
pend->transport))) {
log_info("matched query time %d in range [%d, %d] "
"with entry line %d", timenow,
p->start_step, p->end_step, (*entry)->lineno);
if(p->addrlen != 0)
log_addr(0, "matched ip", &p->addr, p->addrlen);
log_pkt("matched pkt: ",
(*entry)->reply_list->reply_pkt,
(*entry)->reply_list->reply_len);
return 1;
}
p = p->next_range;
}
return 0;
}
/**
* See if outgoing pending query matches an entry.
* @param runtime: runtime.
* @param entry: if true, the entry that matches is returned.
* @param pend: if true, the outgoing message that matches is returned.
* @return: true if pending query matches the now event.
*/
static int
pending_matches_range(struct replay_runtime* runtime,
struct entry** entry, struct fake_pending** pend)
{
struct fake_pending* p = runtime->pending_list;
/* slow, O(N*N), but it works as advertised with weird matching */
while(p) {
log_info("check of pending");
if(pending_find_match(runtime, entry, p)) {
*pend = p;
return 1;
}
p = p->next;
}
return 0;
}
/**
* Remove the item from the pending list.
*/
static void
pending_list_delete(struct replay_runtime* runtime, struct fake_pending* pend)
{
struct fake_pending** prev = &runtime->pending_list;
struct fake_pending* p = runtime->pending_list;
while(p) {
if(p == pend) {
*prev = p->next;
delete_fake_pending(pend);
return;
}
prev = &p->next;
p = p->next;
}
}
/**
* Fill buffer with reply from the entry.
*/
static void
fill_buffer_with_reply(sldns_buffer* buffer, struct entry* entry, uint8_t* q,
size_t qlen)
{
uint8_t* c;
size_t clen;
log_assert(entry && entry->reply_list);
sldns_buffer_clear(buffer);
if(entry->reply_list->reply_from_hex) {
c = sldns_buffer_begin(entry->reply_list->reply_from_hex);
clen = sldns_buffer_limit(entry->reply_list->reply_from_hex);
if(!c) fatal_exit("out of memory");
} else {
c = entry->reply_list->reply_pkt;
clen = entry->reply_list->reply_len;
}
if(c) {
if(q) adjust_packet(entry, &c, &clen, q, qlen);
sldns_buffer_write(buffer, c, clen);
if(q) free(c);
}
sldns_buffer_flip(buffer);
}
/**
* Perform range entry on pending message.
* @param runtime: runtime buffer size preference.
* @param entry: entry that codes for the reply to do.
* @param pend: pending query that is answered, callback called.
*/
static void
answer_callback_from_entry(struct replay_runtime* runtime,
struct entry* entry, struct fake_pending* pend)
{
struct comm_point c;
struct comm_reply repinfo;
void* cb_arg = pend->cb_arg;
comm_point_callback_type* cb = pend->callback;
memset(&c, 0, sizeof(c));
c.fd = -1;
c.buffer = sldns_buffer_new(runtime->bufsize);
c.type = comm_udp;
if(pend->transport == transport_tcp)
c.type = comm_tcp;
fill_buffer_with_reply(c.buffer, entry, pend->pkt, pend->pkt_len);
repinfo.c = &c;
repinfo.addrlen = pend->addrlen;
memcpy(&repinfo.addr, &pend->addr, pend->addrlen);
if(!pend->serviced)
pending_list_delete(runtime, pend);
if((*cb)(&c, cb_arg, NETEVENT_NOERROR, &repinfo)) {
fatal_exit("testbound: unexpected: callback returned 1");
}
sldns_buffer_free(c.buffer);
}
/** Check the now moment answer check event */
static void
answer_check_it(struct replay_runtime* runtime)
{
struct replay_answer* ans = runtime->answer_list,
*prev = NULL;
log_assert(runtime && runtime->now &&
runtime->now->evt_type == repevt_front_reply);
while(ans) {
enum transport_type tr = transport_tcp;
if(ans->repinfo.c->type == comm_udp)
tr = transport_udp;
if((runtime->now->addrlen == 0 || sockaddr_cmp(
&runtime->now->addr, runtime->now->addrlen,
&ans->repinfo.addr, ans->repinfo.addrlen) == 0) &&
find_match(runtime->now->match, ans->pkt,
ans->pkt_len, tr)) {
log_info("testbound matched event entry from line %d",
runtime->now->match->lineno);
log_info("testbound: do STEP %d %s",
runtime->now->time_step,
repevt_string(runtime->now->evt_type));
if(prev)
prev->next = ans->next;
else runtime->answer_list = ans->next;
if(!ans->next)
runtime->answer_last = prev;
delete_replay_answer(ans);
return;
} else {
prev = ans;
ans = ans->next;
}
}
log_info("testbound: do STEP %d %s", runtime->now->time_step,
repevt_string(runtime->now->evt_type));
fatal_exit("testbound: not matched");
}
/**
* Create commpoint (as return address) for a fake incoming query.
*/
static void
fake_front_query(struct replay_runtime* runtime, struct replay_moment *todo)
{
struct comm_reply repinfo;
memset(&repinfo, 0, sizeof(repinfo));
repinfo.c = (struct comm_point*)calloc(1, sizeof(struct comm_point));
repinfo.addrlen = (socklen_t)sizeof(struct sockaddr_in);
if(todo->addrlen != 0) {
repinfo.addrlen = todo->addrlen;
memcpy(&repinfo.addr, &todo->addr, todo->addrlen);
}
repinfo.c->fd = -1;
repinfo.c->ev = (struct internal_event*)runtime;
repinfo.c->buffer = sldns_buffer_new(runtime->bufsize);
if(todo->match->match_transport == transport_tcp)
repinfo.c->type = comm_tcp;
else repinfo.c->type = comm_udp;
fill_buffer_with_reply(repinfo.c->buffer, todo->match, NULL, 0);
log_info("testbound: incoming QUERY");
log_pkt("query pkt", todo->match->reply_list->reply_pkt,
todo->match->reply_list->reply_len);
/* call the callback for incoming queries */
if((*runtime->callback_query)(repinfo.c, runtime->cb_arg,
NETEVENT_NOERROR, &repinfo)) {
/* send immediate reply */
comm_point_send_reply(&repinfo);
}
/* clear it again, in case copy not done properly */
memset(&repinfo, 0, sizeof(repinfo));
}
/**
* Perform callback for fake pending message.
*/
static void
fake_pending_callback(struct replay_runtime* runtime,
struct replay_moment* todo, int error)
{
struct fake_pending* p = runtime->pending_list;
struct comm_reply repinfo;
struct comm_point c;
void* cb_arg;
comm_point_callback_type* cb;
memset(&c, 0, sizeof(c));
if(!p) fatal_exit("No pending queries.");
cb_arg = p->cb_arg;
cb = p->callback;
c.buffer = sldns_buffer_new(runtime->bufsize);
c.type = comm_udp;
if(p->transport == transport_tcp)
c.type = comm_tcp;
if(todo->evt_type == repevt_back_reply && todo->match) {
fill_buffer_with_reply(c.buffer, todo->match, p->pkt,
p->pkt_len);
}
repinfo.c = &c;
repinfo.addrlen = p->addrlen;
memcpy(&repinfo.addr, &p->addr, p->addrlen);
if(!p->serviced)
pending_list_delete(runtime, p);
if((*cb)(&c, cb_arg, error, &repinfo)) {
fatal_exit("unexpected: pending callback returned 1");
}
/* delete the pending item. */
sldns_buffer_free(c.buffer);
}
/** pass time */
static void
moment_assign(struct replay_runtime* runtime, struct replay_moment* mom)
{
char* value = macro_process(runtime->vars, runtime, mom->string);
if(!value)
fatal_exit("could not process macro step %d", mom->time_step);
log_info("assign %s = %s", mom->variable, value);
if(!macro_assign(runtime->vars, mom->variable, value))
fatal_exit("out of memory storing macro");
free(value);
if(verbosity >= VERB_ALGO)
macro_print_debug(runtime->vars);
}
/** pass time */
static void
time_passes(struct replay_runtime* runtime, struct replay_moment* mom)
{
struct fake_timer *t;
struct timeval tv = mom->elapse;
if(mom->string) {
char* xp = macro_process(runtime->vars, runtime, mom->string);
double sec;
if(!xp) fatal_exit("could not macro expand %s", mom->string);
verbose(VERB_ALGO, "EVAL %s", mom->string);
sec = atof(xp);
free(xp);
#ifndef S_SPLINT_S
tv.tv_sec = sec;
tv.tv_usec = (int)((sec - (double)tv.tv_sec) *1000000. + 0.5);
#endif
}
timeval_add(&runtime->now_tv, &tv);
runtime->now_secs = (time_t)runtime->now_tv.tv_sec;
#ifndef S_SPLINT_S
log_info("elapsed %d.%6.6d now %d.%6.6d",
(int)tv.tv_sec, (int)tv.tv_usec,
(int)runtime->now_tv.tv_sec, (int)runtime->now_tv.tv_usec);
#endif
/* see if any timers have fired; and run them */
while( (t=replay_get_oldest_timer(runtime)) ) {
t->enabled = 0;
log_info("fake_timer callback");
fptr_ok(fptr_whitelist_comm_timer(t->cb));
(*t->cb)(t->cb_arg);
}
}
/** check autotrust file contents */
static void
autotrust_check(struct replay_runtime* runtime, struct replay_moment* mom)
{
char name[1024], line[1024];
FILE *in;
int lineno = 0, oke=1;
char* expanded;
struct config_strlist* p;
line[sizeof(line)-1] = 0;
log_assert(mom->autotrust_id);
fake_temp_file("_auto_", mom->autotrust_id, name, sizeof(name));
in = fopen(name, "r");
if(!in) fatal_exit("could not open %s: %s", name, strerror(errno));
for(p=mom->file_content; p; p=p->next) {
lineno++;
if(!fgets(line, (int)sizeof(line)-1, in)) {
log_err("autotrust check failed, could not read line");
log_err("file %s, line %d", name, lineno);
log_err("should be: %s", p->str);
fatal_exit("autotrust_check failed");
}
if(line[0]) line[strlen(line)-1] = 0; /* remove newline */
expanded = macro_process(runtime->vars, runtime, p->str);
if(!expanded)
fatal_exit("could not expand macro line %d", lineno);
if(verbosity >= 7 && strcmp(p->str, expanded) != 0)
log_info("expanded '%s' to '%s'", p->str, expanded);
if(strcmp(expanded, line) != 0) {
log_err("mismatch in file %s, line %d", name, lineno);
log_err("file has : %s", line);
log_err("should be: %s", expanded);
free(expanded);
oke = 0;
continue;
}
free(expanded);
fprintf(stderr, "%s:%2d ok : %s\n", name, lineno, line);
}
if(fgets(line, (int)sizeof(line)-1, in)) {
log_err("autotrust check failed, extra lines in %s after %d",
name, lineno);
do {
fprintf(stderr, "file has: %s", line);
} while(fgets(line, (int)sizeof(line)-1, in));
oke = 0;
}
fclose(in);
if(!oke)
fatal_exit("autotrust_check STEP %d failed", mom->time_step);
log_info("autotrust %s is OK", mom->autotrust_id);
}
/** Store RTT in infra cache */
static void
do_infra_rtt(struct replay_runtime* runtime)
{
struct replay_moment* now = runtime->now;
int rto;
size_t dplen = 0;
uint8_t* dp = sldns_str2wire_dname(now->variable, &dplen);
if(!dp) fatal_exit("cannot parse %s", now->variable);
rto = infra_rtt_update(runtime->infra, &now->addr, now->addrlen,
dp, dplen, LDNS_RR_TYPE_A, atoi(now->string),
-1, runtime->now_secs);
log_addr(0, "INFRA_RTT for", &now->addr, now->addrlen);
log_info("INFRA_RTT(%s roundtrip %d): rto of %d", now->variable,
atoi(now->string), rto);
if(rto == 0) fatal_exit("infra_rtt_update failed");
free(dp);
}
/** perform exponential backoff on the timeout */
static void
expon_timeout_backoff(struct replay_runtime* runtime)
{
struct fake_pending* p = runtime->pending_list;
int rtt, vs;
uint8_t edns_lame_known;
int last_rtt, rto;
if(!p) return; /* no pending packet to backoff */
if(!infra_host(runtime->infra, &p->addr, p->addrlen, p->zone,
p->zonelen, runtime->now_secs, &vs, &edns_lame_known, &rtt))
return;
last_rtt = rtt;
rto = infra_rtt_update(runtime->infra, &p->addr, p->addrlen, p->zone,
p->zonelen, p->qtype, -1, last_rtt, runtime->now_secs);
log_info("infra_rtt_update returned rto %d", rto);
}
/**
* Advance to the next moment.
*/
static void
advance_moment(struct replay_runtime* runtime)
{
if(!runtime->now)
runtime->now = runtime->scenario->mom_first;
else runtime->now = runtime->now->mom_next;
}
/**
* Perform actions or checks determined by the moment.
* Also advances the time by one step.
* @param runtime: scenario runtime information.
*/
static void
do_moment_and_advance(struct replay_runtime* runtime)
{
struct replay_moment* mom;
if(!runtime->now) {
advance_moment(runtime);
return;
}
log_info("testbound: do STEP %d %s", runtime->now->time_step,
repevt_string(runtime->now->evt_type));
switch(runtime->now->evt_type) {
case repevt_nothing:
advance_moment(runtime);
break;
case repevt_front_query:
/* advance moment before doing the step, so that the next
moment which may check some result of the mom step
can catch those results. */
mom = runtime->now;
advance_moment(runtime);
fake_front_query(runtime, mom);
break;
case repevt_front_reply:
if(runtime->answer_list)
log_err("testbound: There are unmatched answers.");
fatal_exit("testbound: query answer not matched");
break;
case repevt_timeout:
mom = runtime->now;
advance_moment(runtime);
expon_timeout_backoff(runtime);
fake_pending_callback(runtime, mom, NETEVENT_TIMEOUT);
break;
case repevt_back_reply:
mom = runtime->now;
advance_moment(runtime);
fake_pending_callback(runtime, mom, NETEVENT_NOERROR);
break;
case repevt_back_query:
/* Back queries are matched when they are sent out. */
log_err("No query matching the current moment was sent.");
fatal_exit("testbound: back query not matched");
break;
case repevt_error:
mom = runtime->now;
advance_moment(runtime);
fake_pending_callback(runtime, mom, NETEVENT_CLOSED);
break;
case repevt_time_passes:
time_passes(runtime, runtime->now);
advance_moment(runtime);
break;
case repevt_autotrust_check:
autotrust_check(runtime, runtime->now);
advance_moment(runtime);
break;
case repevt_assign:
moment_assign(runtime, runtime->now);
advance_moment(runtime);
break;
case repevt_traffic:
advance_moment(runtime);
break;
case repevt_infra_rtt:
do_infra_rtt(runtime);
advance_moment(runtime);
break;
default:
fatal_exit("testbound: unknown event type %d",
runtime->now->evt_type);
}
}
/** run the scenario in event callbacks */
static void
run_scenario(struct replay_runtime* runtime)
{
struct entry* entry = NULL;
struct fake_pending* pending = NULL;
int max_rounds = 5000;
int rounds = 0;
runtime->now = runtime->scenario->mom_first;
log_info("testbound: entering fake runloop");
do {
/* if moment matches pending query do it. */
/* else if moment matches given answer, do it */
/* else if precoded_range matches pending, do it */
/* else do the current moment */
if(pending_matches_current(runtime, &entry, &pending)) {
log_info("testbound: do STEP %d CHECK_OUT_QUERY",
runtime->now->time_step);
advance_moment(runtime);
if(entry->copy_id)
answer_callback_from_entry(runtime, entry,
pending);
} else if(runtime->answer_list && runtime->now &&
runtime->now->evt_type == repevt_front_reply) {
answer_check_it(runtime);
advance_moment(runtime);
} else if(pending_matches_range(runtime, &entry, &pending)) {
answer_callback_from_entry(runtime, entry, pending);
} else {
do_moment_and_advance(runtime);
}
log_info("testbound: end of event stage");
rounds++;
if(rounds > max_rounds)
fatal_exit("testbound: too many rounds, it loops.");
} while(runtime->now);
if(runtime->pending_list) {
struct fake_pending* p;
log_err("testbound: there are still messages pending.");
for(p = runtime->pending_list; p; p=p->next) {
log_pkt("pending msg", p->pkt, p->pkt_len);
log_addr(0, "pending to", &p->addr, p->addrlen);
}
fatal_exit("testbound: there are still messages pending.");
}
if(runtime->answer_list) {
fatal_exit("testbound: there are unmatched answers.");
}
log_info("testbound: exiting fake runloop.");
runtime->exit_cleanly = 1;
}
/*********** Dummy routines ***********/
struct listen_dnsport*
listen_create(struct comm_base* base, struct listen_port* ATTR_UNUSED(ports),
size_t bufsize, int ATTR_UNUSED(tcp_accept_count),
void* ATTR_UNUSED(sslctx), struct dt_env* ATTR_UNUSED(dtenv),
comm_point_callback_type* cb, void* cb_arg)
{
struct replay_runtime* runtime = (struct replay_runtime*)base;
struct listen_dnsport* l= calloc(1, sizeof(struct listen_dnsport));
if(!l)
return NULL;
l->base = base;
l->udp_buff = sldns_buffer_new(bufsize);
if(!l->udp_buff) {
free(l);
return NULL;
}
runtime->callback_query = cb;
runtime->cb_arg = cb_arg;
runtime->bufsize = bufsize;
return l;
}
void
listen_delete(struct listen_dnsport* listen)
{
if(!listen)
return;
sldns_buffer_free(listen->udp_buff);
free(listen);
}
struct comm_base*
comm_base_create(int ATTR_UNUSED(sigs))
{
/* we return the runtime structure instead. */
struct replay_runtime* runtime = (struct replay_runtime*)
calloc(1, sizeof(struct replay_runtime));
runtime->scenario = saved_scenario;
runtime->vars = macro_store_create();
if(!runtime->vars) fatal_exit("out of memory");
return (struct comm_base*)runtime;
}
void
comm_base_delete(struct comm_base* b)
{
struct replay_runtime* runtime = (struct replay_runtime*)b;
struct fake_pending* p, *np;
struct replay_answer* a, *na;
struct fake_timer* t, *nt;
if(!runtime)
return;
runtime->scenario= NULL;
p = runtime->pending_list;
while(p) {
np = p->next;
delete_fake_pending(p);
p = np;
}
a = runtime->answer_list;
while(a) {
na = a->next;
delete_replay_answer(a);
a = na;
}
t = runtime->timer_list;
while(t) {
nt = t->next;
free(t);
t = nt;
}
macro_store_delete(runtime->vars);
free(runtime);
}
void
comm_base_timept(struct comm_base* b, time_t** tt, struct timeval** tv)
{
struct replay_runtime* runtime = (struct replay_runtime*)b;
*tt = &runtime->now_secs;
*tv = &runtime->now_tv;
}
void
comm_base_dispatch(struct comm_base* b)
{
struct replay_runtime* runtime = (struct replay_runtime*)b;
run_scenario(runtime);
if(runtime->sig_cb)
(*runtime->sig_cb)(SIGTERM, runtime->sig_cb_arg);
else exit(0); /* OK exit when LIBEVENT_SIGNAL_PROBLEM exists */
}
void
comm_base_exit(struct comm_base* b)
{
struct replay_runtime* runtime = (struct replay_runtime*)b;
if(!runtime->exit_cleanly) {
/* some sort of failure */
fatal_exit("testbound: comm_base_exit was called.");
}
}
struct comm_signal*
comm_signal_create(struct comm_base* base,
void (*callback)(int, void*), void* cb_arg)
{
struct replay_runtime* runtime = (struct replay_runtime*)base;
runtime->sig_cb = callback;
runtime->sig_cb_arg = cb_arg;
return calloc(1, sizeof(struct comm_signal));
}
int
comm_signal_bind(struct comm_signal* ATTR_UNUSED(comsig), int
ATTR_UNUSED(sig))
{
return 1;
}
void
comm_signal_delete(struct comm_signal* comsig)
{
free(comsig);
}
void
comm_point_send_reply(struct comm_reply* repinfo)
{
struct replay_answer* ans = (struct replay_answer*)calloc(1,
sizeof(struct replay_answer));
struct replay_runtime* runtime = (struct replay_runtime*)repinfo->c->ev;
log_info("testbound: comm_point_send_reply fake");
/* dump it into the todo list */
log_assert(ans);
memcpy(&ans->repinfo, repinfo, sizeof(struct comm_reply));
ans->next = NULL;
if(runtime->answer_last)
runtime->answer_last->next = ans;
else runtime->answer_list = ans;
runtime->answer_last = ans;
/* try to parse packet */
ans->pkt = memdup(sldns_buffer_begin(ans->repinfo.c->buffer),
sldns_buffer_limit(ans->repinfo.c->buffer));
ans->pkt_len = sldns_buffer_limit(ans->repinfo.c->buffer);
if(!ans->pkt) fatal_exit("out of memory");
log_pkt("reply pkt: ", ans->pkt, ans->pkt_len);
}
void
comm_point_drop_reply(struct comm_reply* repinfo)
{
log_info("comm_point_drop_reply fake");
if(repinfo->c) {
sldns_buffer_free(repinfo->c->buffer);
free(repinfo->c);
}
}
struct outside_network*
outside_network_create(struct comm_base* base, size_t bufsize,
size_t ATTR_UNUSED(num_ports), char** ATTR_UNUSED(ifs),
int ATTR_UNUSED(num_ifs), int ATTR_UNUSED(do_ip4),
int ATTR_UNUSED(do_ip6), size_t ATTR_UNUSED(num_tcp),
struct infra_cache* infra,
struct ub_randstate* ATTR_UNUSED(rnd),
int ATTR_UNUSED(use_caps_for_id), int* ATTR_UNUSED(availports),
int ATTR_UNUSED(numavailports), size_t ATTR_UNUSED(unwanted_threshold),
int ATTR_UNUSED(outgoing_tcp_mss),
void (*unwanted_action)(void*), void* ATTR_UNUSED(unwanted_param),
int ATTR_UNUSED(do_udp), void* ATTR_UNUSED(sslctx),
int ATTR_UNUSED(delayclose), struct dt_env* ATTR_UNUSED(dtenv))
{
struct replay_runtime* runtime = (struct replay_runtime*)base;
struct outside_network* outnet = calloc(1,
sizeof(struct outside_network));
(void)unwanted_action;
if(!outnet)
return NULL;
runtime->infra = infra;
outnet->base = base;
outnet->udp_buff = sldns_buffer_new(bufsize);
if(!outnet->udp_buff) {
free(outnet);
return NULL;
}
return outnet;
}
void
outside_network_delete(struct outside_network* outnet)
{
if(!outnet)
return;
sldns_buffer_free(outnet->udp_buff);
free(outnet);
}
void
outside_network_quit_prepare(struct outside_network* ATTR_UNUSED(outnet))
{
}
struct pending*
pending_udp_query(struct serviced_query* sq, sldns_buffer* packet,
int timeout, comm_point_callback_type* callback, void* callback_arg)
{
struct replay_runtime* runtime = (struct replay_runtime*)
sq->outnet->base;
struct fake_pending* pend = (struct fake_pending*)calloc(1,
sizeof(struct fake_pending));
log_assert(pend);
pend->buffer = sldns_buffer_new(sldns_buffer_capacity(packet));
log_assert(pend->buffer);
sldns_buffer_write(pend->buffer, sldns_buffer_begin(packet),
sldns_buffer_limit(packet));
sldns_buffer_flip(pend->buffer);
memcpy(&pend->addr, &sq->addr, sq->addrlen);
pend->addrlen = sq->addrlen;
pend->callback = callback;
pend->cb_arg = callback_arg;
pend->timeout = timeout/1000;
pend->transport = transport_udp;
pend->pkt = NULL;
pend->zone = NULL;
pend->serviced = 0;
pend->runtime = runtime;
pend->pkt_len = sldns_buffer_limit(packet);
pend->pkt = memdup(sldns_buffer_begin(packet), pend->pkt_len);
if(!pend->pkt) fatal_exit("out of memory");
log_pkt("pending udp pkt: ", pend->pkt, pend->pkt_len);
/* see if it matches the current moment */
if(runtime->now && runtime->now->evt_type == repevt_back_query &&
(runtime->now->addrlen == 0 || sockaddr_cmp(
&runtime->now->addr, runtime->now->addrlen,
&pend->addr, pend->addrlen) == 0) &&
find_match(runtime->now->match, pend->pkt, pend->pkt_len,
pend->transport)) {
log_info("testbound: matched pending to event. "
"advance time between events.");
log_info("testbound: do STEP %d %s", runtime->now->time_step,
repevt_string(runtime->now->evt_type));
advance_moment(runtime);
/* still create the pending, because we need it to callback */
}
log_info("testbound: created fake pending");
/* add to list */
pend->next = runtime->pending_list;
runtime->pending_list = pend;
return (struct pending*)pend;
}
struct waiting_tcp*
pending_tcp_query(struct serviced_query* sq, sldns_buffer* packet,
int timeout, comm_point_callback_type* callback, void* callback_arg)
{
struct replay_runtime* runtime = (struct replay_runtime*)
sq->outnet->base;
struct fake_pending* pend = (struct fake_pending*)calloc(1,
sizeof(struct fake_pending));
log_assert(pend);
pend->buffer = sldns_buffer_new(sldns_buffer_capacity(packet));
log_assert(pend->buffer);
sldns_buffer_write(pend->buffer, sldns_buffer_begin(packet),
sldns_buffer_limit(packet));