monero/external/unbound/testcode/replay.c
Erik de Castro Lopo a85b5759f3 Upgrade unbound library
These files were pulled from the 1.6.3 release tarball.

This new version builds against OpenSSL version 1.1 which will be
the default in the new Debian Stable which is due to be released
RealSoonNow (tm).
2017-06-17 23:04:00 +10:00

1034 lines
26 KiB
C

/*
* testcode/replay.c - store and use a replay of events for the DNS resolver.
*
* 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
* Store and use a replay of events for the DNS resolver.
* Used to test known scenarios to get known outcomes.
*/
#include "config.h"
/* for strtod prototype */
#include <math.h>
#include <ctype.h>
#include <time.h>
#include "util/log.h"
#include "util/net_help.h"
#include "util/config_file.h"
#include "testcode/replay.h"
#include "testcode/testpkts.h"
#include "testcode/fake_event.h"
#include "sldns/str2wire.h"
/** max length of lines in file */
#define MAX_LINE_LEN 10240
/**
* Expand a macro
* @param store: value storage
* @param runtime: replay runtime for other stuff.
* @param text: the macro text, after the ${, Updated to after the } when
* done (successfully).
* @return expanded text, malloced. NULL on failure.
*/
static char* macro_expand(rbtree_type* store,
struct replay_runtime* runtime, char** text);
/** compare of time values */
static int
timeval_smaller(const struct timeval* x, const struct timeval* y)
{
#ifndef S_SPLINT_S
if(x->tv_sec < y->tv_sec)
return 1;
else if(x->tv_sec == y->tv_sec) {
if(x->tv_usec <= y->tv_usec)
return 1;
else return 0;
}
else return 0;
#endif
}
/** parse keyword in string.
* @param line: if found, the line is advanced to after the keyword.
* @param keyword: string.
* @return: true if found, false if not.
*/
static int
parse_keyword(char** line, const char* keyword)
{
size_t len = (size_t)strlen(keyword);
if(strncmp(*line, keyword, len) == 0) {
*line += len;
return 1;
}
return 0;
}
/** delete moment */
static void
replay_moment_delete(struct replay_moment* mom)
{
if(!mom)
return;
if(mom->match) {
delete_entry(mom->match);
}
free(mom->autotrust_id);
free(mom->string);
free(mom->variable);
config_delstrlist(mom->file_content);
free(mom);
}
/** delete range */
static void
replay_range_delete(struct replay_range* rng)
{
if(!rng)
return;
delete_entry(rng->match);
free(rng);
}
/** strip whitespace from end of string */
static void
strip_end_white(char* p)
{
size_t i;
for(i = strlen(p); i > 0; i--) {
if(isspace((unsigned char)p[i-1]))
p[i-1] = 0;
else return;
}
}
/**
* Read a range from file.
* @param remain: Rest of line (after RANGE keyword).
* @param in: file to read from.
* @param name: name to print in errors.
* @param pstate: read state structure with
* with lineno : incremented as lines are read.
* ttl, origin, prev for readentry.
* @param line: line buffer.
* @return: range object to add to list, or NULL on error.
*/
static struct replay_range*
replay_range_read(char* remain, FILE* in, const char* name,
struct sldns_file_parse_state* pstate, char* line)
{
struct replay_range* rng = (struct replay_range*)malloc(
sizeof(struct replay_range));
off_t pos;
char *parse;
struct entry* entry, *last = NULL;
if(!rng)
return NULL;
memset(rng, 0, sizeof(*rng));
/* read time range */
if(sscanf(remain, " %d %d", &rng->start_step, &rng->end_step)!=2) {
log_err("Could not read time range: %s", line);
free(rng);
return NULL;
}
/* read entries */
pos = ftello(in);
while(fgets(line, MAX_LINE_LEN-1, in)) {
pstate->lineno++;
parse = line;
while(isspace((unsigned char)*parse))
parse++;
if(!*parse || *parse == ';') {
pos = ftello(in);
continue;
}
if(parse_keyword(&parse, "ADDRESS")) {
while(isspace((unsigned char)*parse))
parse++;
strip_end_white(parse);
if(!extstrtoaddr(parse, &rng->addr, &rng->addrlen)) {
log_err("Line %d: could not read ADDRESS: %s",
pstate->lineno, parse);
free(rng);
return NULL;
}
pos = ftello(in);
continue;
}
if(parse_keyword(&parse, "RANGE_END")) {
return rng;
}
/* set position before line; read entry */
pstate->lineno--;
fseeko(in, pos, SEEK_SET);
entry = read_entry(in, name, pstate, 1);
if(!entry)
fatal_exit("%d: bad entry", pstate->lineno);
entry->next = NULL;
if(last)
last->next = entry;
else rng->match = entry;
last = entry;
pos = ftello(in);
}
replay_range_delete(rng);
return NULL;
}
/** Read FILE match content */
static void
read_file_content(FILE* in, int* lineno, struct replay_moment* mom)
{
char line[MAX_LINE_LEN];
char* remain = line;
struct config_strlist** last = &mom->file_content;
line[MAX_LINE_LEN-1]=0;
if(!fgets(line, MAX_LINE_LEN-1, in))
fatal_exit("FILE_BEGIN expected at line %d", *lineno);
if(!parse_keyword(&remain, "FILE_BEGIN"))
fatal_exit("FILE_BEGIN expected at line %d", *lineno);
while(fgets(line, MAX_LINE_LEN-1, in)) {
(*lineno)++;
if(strncmp(line, "FILE_END", 8) == 0) {
return;
}
if(line[0]) line[strlen(line)-1] = 0; /* remove newline */
if(!cfg_strlist_insert(last, strdup(line)))
fatal_exit("malloc failure");
last = &( (*last)->next );
}
fatal_exit("no FILE_END in input file");
}
/** read assign step info */
static void
read_assign_step(char* remain, struct replay_moment* mom)
{
char buf[1024];
char eq;
int skip;
buf[sizeof(buf)-1]=0;
if(sscanf(remain, " %1023s %c %n", buf, &eq, &skip) != 2)
fatal_exit("cannot parse assign: %s", remain);
mom->variable = strdup(buf);
if(eq != '=')
fatal_exit("no '=' in assign: %s", remain);
remain += skip;
if(remain[0]) remain[strlen(remain)-1]=0; /* remove newline */
mom->string = strdup(remain);
if(!mom->variable || !mom->string)
fatal_exit("out of memory");
}
/**
* Read a replay moment 'STEP' from file.
* @param remain: Rest of line (after STEP keyword).
* @param in: file to read from.
* @param name: name to print in errors.
* @param pstate: with lineno, ttl, origin, prev for parse state.
* lineno is incremented.
* @return: range object to add to list, or NULL on error.
*/
static struct replay_moment*
replay_moment_read(char* remain, FILE* in, const char* name,
struct sldns_file_parse_state* pstate)
{
struct replay_moment* mom = (struct replay_moment*)malloc(
sizeof(struct replay_moment));
int skip = 0;
int readentry = 0;
if(!mom)
return NULL;
memset(mom, 0, sizeof(*mom));
if(sscanf(remain, " %d%n", &mom->time_step, &skip) != 1) {
log_err("%d: cannot read number: %s", pstate->lineno, remain);
free(mom);
return NULL;
}
remain += skip;
while(isspace((unsigned char)*remain))
remain++;
if(parse_keyword(&remain, "NOTHING")) {
mom->evt_type = repevt_nothing;
} else if(parse_keyword(&remain, "QUERY")) {
mom->evt_type = repevt_front_query;
readentry = 1;
if(!extstrtoaddr("127.0.0.1", &mom->addr, &mom->addrlen))
fatal_exit("internal error");
} else if(parse_keyword(&remain, "CHECK_ANSWER")) {
mom->evt_type = repevt_front_reply;
readentry = 1;
} else if(parse_keyword(&remain, "CHECK_OUT_QUERY")) {
mom->evt_type = repevt_back_query;
readentry = 1;
} else if(parse_keyword(&remain, "REPLY")) {
mom->evt_type = repevt_back_reply;
readentry = 1;
} else if(parse_keyword(&remain, "TIMEOUT")) {
mom->evt_type = repevt_timeout;
} else if(parse_keyword(&remain, "TIME_PASSES")) {
mom->evt_type = repevt_time_passes;
while(isspace((unsigned char)*remain))
remain++;
if(parse_keyword(&remain, "EVAL")) {
while(isspace((unsigned char)*remain))
remain++;
mom->string = strdup(remain);
if(!mom->string) fatal_exit("out of memory");
if(strlen(mom->string)>0)
mom->string[strlen(mom->string)-1]=0;
remain += strlen(mom->string);
}
} else if(parse_keyword(&remain, "CHECK_AUTOTRUST")) {
mom->evt_type = repevt_autotrust_check;
while(isspace((unsigned char)*remain))
remain++;
if(strlen(remain)>0 && remain[strlen(remain)-1]=='\n')
remain[strlen(remain)-1] = 0;
mom->autotrust_id = strdup(remain);
if(!mom->autotrust_id) fatal_exit("out of memory");
read_file_content(in, &pstate->lineno, mom);
} else if(parse_keyword(&remain, "ERROR")) {
mom->evt_type = repevt_error;
} else if(parse_keyword(&remain, "TRAFFIC")) {
mom->evt_type = repevt_traffic;
} else if(parse_keyword(&remain, "ASSIGN")) {
mom->evt_type = repevt_assign;
read_assign_step(remain, mom);
} else if(parse_keyword(&remain, "INFRA_RTT")) {
char *s, *m;
mom->evt_type = repevt_infra_rtt;
while(isspace((unsigned char)*remain))
remain++;
s = remain;
remain = strchr(s, ' ');
if(!remain) fatal_exit("expected three args for INFRA_RTT");
remain[0] = 0;
remain++;
while(isspace((unsigned char)*remain))
remain++;
m = strchr(remain, ' ');
if(!m) fatal_exit("expected three args for INFRA_RTT");
m[0] = 0;
m++;
while(isspace((unsigned char)*m))
m++;
if(!extstrtoaddr(s, &mom->addr, &mom->addrlen))
fatal_exit("bad infra_rtt address %s", s);
if(strlen(m)>0 && m[strlen(m)-1]=='\n')
m[strlen(m)-1] = 0;
mom->variable = strdup(remain);
mom->string = strdup(m);
if(!mom->string) fatal_exit("out of memory");
if(!mom->variable) fatal_exit("out of memory");
} else {
log_err("%d: unknown event type %s", pstate->lineno, remain);
free(mom);
return NULL;
}
while(isspace((unsigned char)*remain))
remain++;
if(parse_keyword(&remain, "ADDRESS")) {
while(isspace((unsigned char)*remain))
remain++;
if(strlen(remain) > 0) /* remove \n */
remain[strlen(remain)-1] = 0;
if(!extstrtoaddr(remain, &mom->addr, &mom->addrlen)) {
log_err("line %d: could not parse ADDRESS: %s",
pstate->lineno, remain);
free(mom);
return NULL;
}
}
if(parse_keyword(&remain, "ELAPSE")) {
double sec;
errno = 0;
sec = strtod(remain, &remain);
if(sec == 0. && errno != 0) {
log_err("line %d: could not parse ELAPSE: %s (%s)",
pstate->lineno, remain, strerror(errno));
free(mom);
return NULL;
}
#ifndef S_SPLINT_S
mom->elapse.tv_sec = (int)sec;
mom->elapse.tv_usec = (int)((sec - (double)mom->elapse.tv_sec)
*1000000. + 0.5);
#endif
}
if(readentry) {
mom->match = read_entry(in, name, pstate, 1);
if(!mom->match) {
free(mom);
return NULL;
}
}
return mom;
}
/** makes scenario with title on rest of line */
static struct replay_scenario*
make_scenario(char* line)
{
struct replay_scenario* scen;
while(isspace((unsigned char)*line))
line++;
if(!*line) {
log_err("scenario: no title given");
return NULL;
}
scen = (struct replay_scenario*)malloc(sizeof(struct replay_scenario));
if(!scen)
return NULL;
memset(scen, 0, sizeof(*scen));
scen->title = strdup(line);
if(!scen->title) {
free(scen);
return NULL;
}
return scen;
}
struct replay_scenario*
replay_scenario_read(FILE* in, const char* name, int* lineno)
{
char line[MAX_LINE_LEN];
char *parse;
struct replay_scenario* scen = NULL;
struct sldns_file_parse_state pstate;
line[MAX_LINE_LEN-1]=0;
memset(&pstate, 0, sizeof(pstate));
pstate.default_ttl = 3600;
pstate.lineno = *lineno;
while(fgets(line, MAX_LINE_LEN-1, in)) {
parse=line;
pstate.lineno++;
(*lineno)++;
while(isspace((unsigned char)*parse))
parse++;
if(!*parse)
continue; /* empty line */
if(parse_keyword(&parse, ";"))
continue; /* comment */
if(parse_keyword(&parse, "SCENARIO_BEGIN")) {
scen = make_scenario(parse);
if(!scen)
fatal_exit("%d: could not make scen", *lineno);
continue;
}
if(!scen)
fatal_exit("%d: expected SCENARIO", *lineno);
if(parse_keyword(&parse, "RANGE_BEGIN")) {
struct replay_range* newr = replay_range_read(parse,
in, name, &pstate, line);
if(!newr)
fatal_exit("%d: bad range", pstate.lineno);
*lineno = pstate.lineno;
newr->next_range = scen->range_list;
scen->range_list = newr;
} else if(parse_keyword(&parse, "STEP")) {
struct replay_moment* mom = replay_moment_read(parse,
in, name, &pstate);
if(!mom)
fatal_exit("%d: bad moment", pstate.lineno);
*lineno = pstate.lineno;
if(scen->mom_last &&
scen->mom_last->time_step >= mom->time_step)
fatal_exit("%d: time goes backwards", *lineno);
if(scen->mom_last)
scen->mom_last->mom_next = mom;
else scen->mom_first = mom;
scen->mom_last = mom;
} else if(parse_keyword(&parse, "SCENARIO_END")) {
struct replay_moment *p = scen->mom_first;
int num = 0;
while(p) {
num++;
p = p->mom_next;
}
log_info("Scenario has %d steps", num);
return scen;
}
}
replay_scenario_delete(scen);
return NULL;
}
void
replay_scenario_delete(struct replay_scenario* scen)
{
struct replay_moment* mom, *momn;
struct replay_range* rng, *rngn;
if(!scen)
return;
free(scen->title);
mom = scen->mom_first;
while(mom) {
momn = mom->mom_next;
replay_moment_delete(mom);
mom = momn;
}
rng = scen->range_list;
while(rng) {
rngn = rng->next_range;
replay_range_delete(rng);
rng = rngn;
}
free(scen);
}
/** fetch oldest timer in list that is enabled */
static struct fake_timer*
first_timer(struct replay_runtime* runtime)
{
struct fake_timer* p, *res = NULL;
for(p=runtime->timer_list; p; p=p->next) {
if(!p->enabled)
continue;
if(!res)
res = p;
else if(timeval_smaller(&p->tv, &res->tv))
res = p;
}
return res;
}
struct fake_timer*
replay_get_oldest_timer(struct replay_runtime* runtime)
{
struct fake_timer* t = first_timer(runtime);
if(t && timeval_smaller(&t->tv, &runtime->now_tv))
return t;
return NULL;
}
int
replay_var_compare(const void* a, const void* b)
{
struct replay_var* x = (struct replay_var*)a;
struct replay_var* y = (struct replay_var*)b;
return strcmp(x->name, y->name);
}
rbtree_type*
macro_store_create(void)
{
return rbtree_create(&replay_var_compare);
}
/** helper function to delete macro values */
static void
del_macro(rbnode_type* x, void* ATTR_UNUSED(arg))
{
struct replay_var* v = (struct replay_var*)x;
free(v->name);
free(v->value);
free(v);
}
void
macro_store_delete(rbtree_type* store)
{
if(!store)
return;
traverse_postorder(store, del_macro, NULL);
free(store);
}
/** return length of macro */
static size_t
macro_length(char* text)
{
/* we are after ${, looking for } */
int depth = 0;
size_t len = 0;
while(*text) {
len++;
if(*text == '}') {
if(depth == 0)
break;
depth--;
} else if(text[0] == '$' && text[1] == '{') {
depth++;
}
text++;
}
return len;
}
/** insert new stuff at start of buffer */
static int
do_buf_insert(char* buf, size_t remain, char* after, char* inserted)
{
char* save = strdup(after);
size_t len;
if(!save) return 0;
if(strlen(inserted) > remain) {
free(save);
return 0;
}
len = strlcpy(buf, inserted, remain);
buf += len;
remain -= len;
(void)strlcpy(buf, save, remain);
free(save);
return 1;
}
/** do macro recursion */
static char*
do_macro_recursion(rbtree_type* store, struct replay_runtime* runtime,
char* at, size_t remain)
{
char* after = at+2;
char* expand = macro_expand(store, runtime, &after);
if(!expand)
return NULL; /* expansion failed */
if(!do_buf_insert(at, remain, after, expand)) {
free(expand);
return NULL;
}
free(expand);
return at; /* and parse over the expanded text to see if again */
}
/** get var from store */
static struct replay_var*
macro_getvar(rbtree_type* store, char* name)
{
struct replay_var k;
k.node.key = &k;
k.name = name;
return (struct replay_var*)rbtree_search(store, &k);
}
/** do macro variable */
static char*
do_macro_variable(rbtree_type* store, char* buf, size_t remain)
{
struct replay_var* v;
char* at = buf+1;
char* name = at;
char sv;
if(at[0]==0)
return NULL; /* no variable name after $ */
while(*at && (isalnum((unsigned char)*at) || *at=='_')) {
at++;
}
/* terminator, we are working in macro_expand() buffer */
sv = *at;
*at = 0;
v = macro_getvar(store, name);
*at = sv;
if(!v) {
log_err("variable is not defined: $%s", name);
return NULL; /* variable undefined is error for now */
}
/* insert the variable contents */
if(!do_buf_insert(buf, remain, at, v->value))
return NULL;
return buf; /* and expand the variable contents */
}
/** do ctime macro on argument */
static char*
do_macro_ctime(char* arg)
{
char buf[32];
time_t tt = (time_t)atoi(arg);
if(tt == 0 && strcmp(arg, "0") != 0) {
log_err("macro ctime: expected number, not: %s", arg);
return NULL;
}
ctime_r(&tt, buf);
if(buf[0]) buf[strlen(buf)-1]=0; /* remove trailing newline */
return strdup(buf);
}
/** perform arithmetic operator */
static double
perform_arith(double x, char op, double y, double* res)
{
switch(op) {
case '+':
*res = x+y;
break;
case '-':
*res = x-y;
break;
case '/':
*res = x/y;
break;
case '*':
*res = x*y;
break;
default:
return 0;
}
return 1;
}
/** do macro arithmetic on two numbers and operand */
static char*
do_macro_arith(char* orig, size_t remain, char** arithstart)
{
double x, y, result;
char operator;
int skip;
char buf[32];
char* at;
/* not yet done? we want number operand number expanded first. */
if(!*arithstart) {
/* remember start pos of expr, skip the first number */
at = orig;
*arithstart = at;
while(*at && (isdigit((unsigned char)*at) || *at == '.'))
at++;
return at;
}
/* move back to start */
remain += (size_t)(orig - *arithstart);
at = *arithstart;
/* parse operands */
if(sscanf(at, " %lf %c %lf%n", &x, &operator, &y, &skip) != 3) {
*arithstart = NULL;
return do_macro_arith(orig, remain, arithstart);
}
if(isdigit((unsigned char)operator)) {
*arithstart = orig;
return at+skip; /* do nothing, but setup for later number */
}
/* calculate result */
if(!perform_arith(x, operator, y, &result)) {
log_err("unknown operator: %s", at);
return NULL;
}
/* put result back in buffer */
snprintf(buf, sizeof(buf), "%.12g", result);
if(!do_buf_insert(at, remain, at+skip, buf))
return NULL;
/* the result can be part of another expression, restart that */
*arithstart = NULL;
return at;
}
/** Do range macro on expanded buffer */
static char*
do_macro_range(char* buf)
{
double x, y, z;
if(sscanf(buf, " %lf %lf %lf", &x, &y, &z) != 3) {
log_err("range func requires 3 args: %s", buf);
return NULL;
}
if(x <= y && y <= z) {
char res[1024];
snprintf(res, sizeof(res), "%.24g", y);
return strdup(res);
}
fatal_exit("value %.24g not in range [%.24g, %.24g]", y, x, z);
return NULL;
}
static char*
macro_expand(rbtree_type* store, struct replay_runtime* runtime, char** text)
{
char buf[10240];
char* at = *text;
size_t len = macro_length(at);
int dofunc = 0;
char* arithstart = NULL;
if(len >= sizeof(buf))
return NULL; /* too long */
buf[0] = 0;
(void)strlcpy(buf, at, len+1-1); /* do not copy last '}' character */
at = buf;
/* check for functions */
if(strcmp(buf, "time") == 0) {
snprintf(buf, sizeof(buf), ARG_LL "d", (long long)runtime->now_secs);
*text += len;
return strdup(buf);
} else if(strcmp(buf, "timeout") == 0) {
time_t res = 0;
struct fake_timer* t = first_timer(runtime);
if(t && (time_t)t->tv.tv_sec >= runtime->now_secs)
res = (time_t)t->tv.tv_sec - runtime->now_secs;
snprintf(buf, sizeof(buf), ARG_LL "d", (long long)res);
*text += len;
return strdup(buf);
} else if(strncmp(buf, "ctime ", 6) == 0 ||
strncmp(buf, "ctime\t", 6) == 0) {
at += 6;
dofunc = 1;
} else if(strncmp(buf, "range ", 6) == 0 ||
strncmp(buf, "range\t", 6) == 0) {
at += 6;
dofunc = 1;
}
/* actual macro text expansion */
while(*at) {
size_t remain = sizeof(buf)-strlen(buf);
if(strncmp(at, "${", 2) == 0) {
at = do_macro_recursion(store, runtime, at, remain);
} else if(*at == '$') {
at = do_macro_variable(store, at, remain);
} else if(isdigit((unsigned char)*at)) {
at = do_macro_arith(at, remain, &arithstart);
} else {
/* copy until whitespace or operator */
if(*at && (isalnum((unsigned char)*at) || *at=='_')) {
at++;
while(*at && (isalnum((unsigned char)*at) || *at=='_'))
at++;
} else at++;
}
if(!at) return NULL; /* failure */
}
*text += len;
if(dofunc) {
/* post process functions, buf has the argument(s) */
if(strncmp(buf, "ctime", 5) == 0) {
return do_macro_ctime(buf+6);
} else if(strncmp(buf, "range", 5) == 0) {
return do_macro_range(buf+6);
}
}
return strdup(buf);
}
char*
macro_process(rbtree_type* store, struct replay_runtime* runtime, char* text)
{
char buf[10240];
char* next, *expand;
char* at = text;
if(!strstr(text, "${"))
return strdup(text); /* no macros */
buf[0] = 0;
buf[sizeof(buf)-1]=0;
while( (next=strstr(at, "${")) ) {
/* copy text before next macro */
if((size_t)(next-at) >= sizeof(buf)-strlen(buf))
return NULL; /* string too long */
(void)strlcpy(buf+strlen(buf), at, (size_t)(next-at+1));
/* process the macro itself */
next += 2;
expand = macro_expand(store, runtime, &next);
if(!expand) return NULL; /* expansion failed */
(void)strlcpy(buf+strlen(buf), expand, sizeof(buf)-strlen(buf));
free(expand);
at = next;
}
/* copy remainder fixed text */
(void)strlcpy(buf+strlen(buf), at, sizeof(buf)-strlen(buf));
return strdup(buf);
}
char*
macro_lookup(rbtree_type* store, char* name)
{
struct replay_var* x = macro_getvar(store, name);
if(!x) return strdup("");
return strdup(x->value);
}
void macro_print_debug(rbtree_type* store)
{
struct replay_var* x;
RBTREE_FOR(x, struct replay_var*, store) {
log_info("%s = %s", x->name, x->value);
}
}
int
macro_assign(rbtree_type* store, char* name, char* value)
{
struct replay_var* x = macro_getvar(store, name);
if(x) {
free(x->value);
} else {
x = (struct replay_var*)malloc(sizeof(*x));
if(!x) return 0;
x->node.key = x;
x->name = strdup(name);
if(!x->name) {
free(x);
return 0;
}
(void)rbtree_insert(store, &x->node);
}
x->value = strdup(value);
return x->value != NULL;
}
/* testbound assert function for selftest. counts the number of tests */
#define tb_assert(x) \
do { if(!(x)) fatal_exit("%s:%d: %s: assertion %s failed", \
__FILE__, __LINE__, __func__, #x); \
num_asserts++; \
} while(0);
void testbound_selftest(void)
{
/* test the macro store */
rbtree_type* store = macro_store_create();
char* v;
int r;
int num_asserts = 0;
tb_assert(store);
v = macro_lookup(store, "bla");
tb_assert(strcmp(v, "") == 0);
free(v);
v = macro_lookup(store, "vlerk");
tb_assert(strcmp(v, "") == 0);
free(v);
r = macro_assign(store, "bla", "waarde1");
tb_assert(r);
v = macro_lookup(store, "vlerk");
tb_assert(strcmp(v, "") == 0);
free(v);
v = macro_lookup(store, "bla");
tb_assert(strcmp(v, "waarde1") == 0);
free(v);
r = macro_assign(store, "vlerk", "kanteel");
tb_assert(r);
v = macro_lookup(store, "bla");
tb_assert(strcmp(v, "waarde1") == 0);
free(v);
v = macro_lookup(store, "vlerk");
tb_assert(strcmp(v, "kanteel") == 0);
free(v);
r = macro_assign(store, "bla", "ww");
tb_assert(r);
v = macro_lookup(store, "bla");
tb_assert(strcmp(v, "ww") == 0);
free(v);
tb_assert( macro_length("}") == 1);
tb_assert( macro_length("blabla}") == 7);
tb_assert( macro_length("bla${zoink}bla}") == 7+8);
tb_assert( macro_length("bla${zoink}${bla}bla}") == 7+8+6);
v = macro_process(store, NULL, "");
tb_assert( v && strcmp(v, "") == 0);
free(v);
v = macro_process(store, NULL, "${}");
tb_assert( v && strcmp(v, "") == 0);
free(v);
v = macro_process(store, NULL, "blabla ${} dinges");
tb_assert( v && strcmp(v, "blabla dinges") == 0);
free(v);
v = macro_process(store, NULL, "1${$bla}2${$bla}3");
tb_assert( v && strcmp(v, "1ww2ww3") == 0);
free(v);
v = macro_process(store, NULL, "it is ${ctime 123456}");
tb_assert( v && strcmp(v, "it is Fri Jan 2 10:17:36 1970") == 0);
free(v);
r = macro_assign(store, "t1", "123456");
tb_assert(r);
v = macro_process(store, NULL, "it is ${ctime ${$t1}}");
tb_assert( v && strcmp(v, "it is Fri Jan 2 10:17:36 1970") == 0);
free(v);
v = macro_process(store, NULL, "it is ${ctime $t1}");
tb_assert( v && strcmp(v, "it is Fri Jan 2 10:17:36 1970") == 0);
free(v);
r = macro_assign(store, "x", "1");
tb_assert(r);
r = macro_assign(store, "y", "2");
tb_assert(r);
v = macro_process(store, NULL, "${$x + $x}");
tb_assert( v && strcmp(v, "2") == 0);
free(v);
v = macro_process(store, NULL, "${$x - $x}");
tb_assert( v && strcmp(v, "0") == 0);
free(v);
v = macro_process(store, NULL, "${$y * $y}");
tb_assert( v && strcmp(v, "4") == 0);
free(v);
v = macro_process(store, NULL, "${32 / $y + $x + $y}");
tb_assert( v && strcmp(v, "19") == 0);
free(v);
v = macro_process(store, NULL, "${32 / ${$y+$y} + ${${100*3}/3}}");
tb_assert( v && strcmp(v, "108") == 0);
free(v);
v = macro_process(store, NULL, "${1 2 33 2 1}");
tb_assert( v && strcmp(v, "1 2 33 2 1") == 0);
free(v);
v = macro_process(store, NULL, "${123 3 + 5}");
tb_assert( v && strcmp(v, "123 8") == 0);
free(v);
v = macro_process(store, NULL, "${123 glug 3 + 5}");
tb_assert( v && strcmp(v, "123 glug 8") == 0);
free(v);
macro_store_delete(store);
printf("selftest successful (%d checks).\n", num_asserts);
}