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asterisk/pbx/pbx_ael.c

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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Compile symbolic Asterisk Extension Logic into Asterisk extensions
*
*/
#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/pbx.h"
#include "asterisk/config.h"
#include "asterisk/module.h"
#include "asterisk/logger.h"
#include "asterisk/cli.h"
#include "asterisk/callerid.h"
struct stringlink {
struct stringlink *next;
char data[0];
};
#define FILLIN_BREAK 1
#define FILLIN_CONTINUE 2
struct fillin {
struct fillin *next;
char exten[AST_MAX_EXTENSION];
int priority;
int type;
};
#ifdef __AST_DEBUG_MALLOC
static void FREE(void *ptr)
{
free(ptr);
}
#else
#define FREE free
#endif
#define DEBUG_READ (1 << 0)
#define DEBUG_TOKENS (1 << 1)
#define DEBUG_MACROS (1 << 2)
#define DEBUG_CONTEXTS (1 << 3)
static int aeldebug = 0;
static char *dtext = "Asterisk Extension Language Compiler";
static char *config = "extensions.ael";
static char *registrar = "pbx_ael";
static char *__grab_token(char *src, const char *filename, int lineno, int link)
{
char *c;
char *b;
char *a;
int level = 0;
char *ret;
#if 0
if (aeldebug || DEBUG_TOKENS)
ast_verbose("Searching for token in '%s'!\n", src);
#endif
c = src;
while(*c) {
if ((*c == '\\')) {
c++;
if (!*c)
c--;
} else {
if ((*c == '{') || (*c == '(')) {
level++;
} else if ((*c == '}') || (*c == ')')) {
if (level)
level--;
else
ast_log(LOG_WARNING, "Syntax error at line %d of '%s', too many closing braces!\n", lineno, filename);
} else if ((*c == ';') && !level) {
/* Got a token! */
*c = '\0';
b = c;
b--;
c++;
while((b > src) && (*b < 33)) {
*b = '\0';
b--;
}
a = ast_skip_blanks(src);
if (link) {
ret = malloc(strlen(a) + sizeof(struct stringlink) + 1);
if (ret)
strcpy(ret + sizeof(struct stringlink), a);
} else
ret = strdup(a);
/* Save remainder */
memmove(src, c, strlen(c) + 1);
return ret;
}
}
c++;
}
return NULL;
}
static char *grab_token(char *src, const char *filename, int lineno)
{
return __grab_token(src, filename, lineno, 0);
}
static struct stringlink *arg_parse(char *args, const char *filename, int lineno)
{
struct stringlink *cur, *prev=NULL, *root=NULL;
if (args) {
if (aeldebug & DEBUG_TOKENS)
ast_verbose("Parsing args '%s'!\n", args);
if (args[0] == '{') {
/* Strip mandatory '}' from end */
args[strlen(args) - 1] = '\0';
while ((cur = (struct stringlink *)__grab_token(args + 1, filename, lineno, 1))) {
cur->next = NULL;
if (prev)
prev->next = cur;
else
root = cur;
prev = cur;
}
} else if (*args) {
root = malloc(sizeof(struct stringlink) + strlen(args) + 1);
if (root) {
strcpy(root->data, args);
root->next = NULL;
}
}
}
return root;
}
static char *grab_else(char *args, const char *filename, int lineno)
{
char *ret = NULL;
int level=0;
char *c;
if (args) {
if (args[0] == '{') {
c = args;
while(*c) {
if (*c == '{')
level++;
else if (*c == '}') {
level--;
if (!level) {
c++;
while(*c && (*c < 33)) { *c = '\0'; c++; };
if (!strncasecmp(c, "else", 4) &&
((c[4] == '{') || (c[4] < 33))) {
/* Ladies and gentlemen, we have an else clause */
*c = '\0';
c += 4;
c = ast_skip_blanks(c);
ret = c;
if (aeldebug & DEBUG_TOKENS)
ast_verbose("Returning else clause '%s'\n", c);
}
break;
}
}
c++;
}
}
}
return ret;
}
static struct stringlink *param_parse(char *parms, const char *macro, const char *filename, int lineno)
{
char *s, *e;
struct stringlink *root = NULL, *prev=NULL, *cur;
if (!parms || !*parms)
return NULL;
if (*parms != '(') {
ast_log(LOG_NOTICE, "Syntax error in parameter list for macro '%s' at about line %d of %s: Expecting '(' but got '%c'\n", macro, lineno, filename, *parms);
return NULL;
}
s = parms + 1;
while(*s) {
s = ast_skip_blanks(s);
e = s;
while(*e && (*e != ')') && (*e != ',')) {
if (*e < 33)
*e = '\0';
e++;
}
if (*e) {
/* Strip token */
*e = '\0';
e++;
/* Skip over whitespace */
e = ast_skip_blanks(e);
/* Link */
cur = malloc(strlen(s) + sizeof(struct stringlink) + 1);
if (cur) {
cur->next = NULL;
strcpy(cur->data, s);
if (prev)
prev->next = cur;
else
root = cur;
prev = cur;
}
s = e;
}
}
return root;
}
static void arg_free(struct stringlink *cur)
{
struct stringlink *last;
while(cur) {
last = cur;
cur = cur->next;
free(last);
}
}
static void handle_globals(struct stringlink *vars)
{
while(vars) {
pbx_builtin_setvar(NULL, vars->data);
vars = vars->next;
}
}
static struct stringlink *split_token(char *token, const char *filename, int lineno)
{
char *args, *p;
struct stringlink *argv;
args = token;
while (*args && (*args > 32) && (*args != '{') && (*args != '(')) args++;
if (*args) {
p = args;
args = ast_skip_blanks(args);
if (*args != '(') {
*p = '\0';
} else {
while (*args && (*args != ')')) args++;
if (*args == ')') {
args++;
args = ast_skip_blanks(args);
}
}
if (!*args)
args = NULL;
} else args = NULL;
argv = arg_parse(args, filename, lineno);
if (args)
*args = '\0';
return argv;
}
static int matches_keyword(const char *data, const char *keyword)
{
char c;
if (!strncasecmp(data, keyword, strlen(keyword))) {
c = data[strlen(keyword)];
if ((c < 33) || (c == '(') || (c == '{'))
return 1;
}
return 0;
}
static struct stringlink *split_params(char *token, const char *filename, int lineno)
{
char *params;
struct stringlink *paramv;
params = token;
while(*params && (*params > 32) && (*params != '(')) params++;
if (*params) {
if (*params != '(') {
*params = '\0';
params++;
params = ast_skip_blanks(params);
}
if (!*params)
params = NULL;
} else params = NULL;
paramv = param_parse(params, token, filename, lineno);
if (params)
*params = '\0';
return paramv;
}
static const char *get_case(char *s, char **restout, int *pattern)
{
char *newcase=NULL;
char *rest=NULL;
if (!strncasecmp(s, "case", 4) && s[4] && ((s[4] < 33) || (s[4] == ':'))) {
newcase = s + 4;
newcase = ast_skip_blanks(newcase);
rest = newcase;
*pattern = 0;
} else if (!strncasecmp(s, "pattern", 7) && s[7] && ((s[7] < 33) || (s[7] == ':'))) {
newcase = s + 8;
newcase = ast_skip_blanks(newcase);
rest = newcase;
*pattern = 1;
} else if (!strncasecmp(s, "default", 7) && ((s[7] < 33) || (s[7] == ':'))) {
newcase = ".";
rest = s + 7;
rest = ast_skip_blanks(rest);
*pattern = 1;
}
if (rest) {
while (*rest && (*rest > 32) && (*rest != ':')) rest++;
if (*rest) {
*rest = 0;
rest++;
while (*rest && ((*rest == ':') || (*rest < 33))) rest++;
*restout = rest;
} else {
*restout = "";
}
} else
*restout = s;
if (aeldebug & DEBUG_TOKENS)
ast_verbose("GETCASE: newcase is '%s', rest = '%s'\n", newcase, *restout);
return newcase;
}
static void fillin_free(struct fillin *fillin)
{
struct fillin *cur, *next;
cur = fillin;
while(cur) {
next = cur->next;
free(cur);
cur = next;
}
}
static void fillin_process(struct ast_context *con, struct fillin *fillin, const char *filename, int lineno, const char *breakexten, int breakprio, const char *contexten, int contprio)
{
struct fillin *cur;
char *app;
char mdata[AST_MAX_EXTENSION + 20];
cur = fillin;
while(cur) {
if (cur->type == FILLIN_BREAK) {
if (breakexten && breakprio) {
app = "Goto";
snprintf(mdata, sizeof(mdata), "%s|%d", breakexten, breakprio);
} else {
app = "NoOp";
snprintf(mdata, sizeof(mdata), "Invalid break");
ast_log(LOG_NOTICE, "Ignoring inappropriate break around line %d of %s\n", lineno, filename);
}
if (ast_add_extension2(con, 0, cur->exten, cur->priority, NULL, NULL, app, strdup(mdata), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of break '%s'\n", cur->priority, cur->exten);
} else if (cur->type == FILLIN_CONTINUE) {
if (contexten && contprio) {
app = "Goto";
snprintf(mdata, sizeof(mdata), "%s|%d", contexten, contprio);
} else {
app = "NoOp";
snprintf(mdata, sizeof(mdata), "Invalid continue");
ast_log(LOG_NOTICE, "Ignoring inappropriate continue around line %d of %s\n", lineno, filename);
}
if (ast_add_extension2(con, 0, cur->exten, cur->priority, NULL, NULL, app, strdup(mdata), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of continue '%s'\n", cur->priority, cur->exten);
} else {
ast_log(LOG_WARNING, "Whoa, unknown fillin type '%d'\n", cur->type);
}
cur = cur->next;
}
}
static int match_assignment(char *variable, char **value)
{
char *c;
char *ws;
int inpar = 0;
c = variable;
while (*c) {
if(*c == ')' && (inpar > 0)) {
inpar--;
} else if(*c == '(' && (inpar >= 0)) {
inpar++;
} else if(*c == '=' && (inpar == 0)) {
break;
}
c++;
}
ws = c;
c = ast_skip_blanks(c);
if (*c == '=') {
*ws = '\0';
*c = '\0';
c++;
c = ast_skip_blanks(c);
*value = c;
return 1;
}
return 0;
}
static int matches_label(char *data, char **rest)
{
char last = 0;
char *start = data;
while (*data > 32) {
last = *data;
data++;
}
if (last != ':') {
data = ast_skip_blanks(data);
last = *data;
data++;
}
if (last == ':') {
*rest = data;
/* Go back and trim up the label */
while(*start && ((*start > 32) && (*start != ':'))) start++;
*start = '\0';
return 1;
}
return 0;
}
static char *argument_end(char *str)
{
int level=0;
while(*++str) {
switch(*str) {
case '(':
level++;
break;
case ')':
if(level)
level--;
else
return str;
break;
default:
break;
}
}
return NULL;
}
static int build_step(const char *what, const char *name, const char *filename, int lineno, struct ast_context *con, char *exten, int *pos, char *data, struct fillin **fillout, char **label);
static int __build_step(const char *what, const char *name, const char *filename, int lineno, struct ast_context *con, char *exten, int *pos, char *data, struct fillin **fillout, char **label)
{
char *app;
char *args;
char *c;
char *margs=NULL;
char *oargs;
char *rest;
const char *curcase, *newcase;
struct stringlink *swargs, *cur;
int cpos;
int mlen;
int pattern = 0;
struct fillin *fillin;
data = ast_skip_blanks(data);
if (matches_label(data, &c)) {
*label = data;
data = c;
data = ast_skip_blanks(data);
}
if (ast_strlen_zero(data))
return 0;
if (matches_keyword(data, "switch")) {
fillin = NULL;
/* Switch */
args = data + strlen("switch");
while ((*args < 33) && (*args != '(')) args++;
if ((*args == '(') && (c = argument_end(args))) {
args++;
*c = '\0';
c++;
if (aeldebug & DEBUG_TOKENS)
ast_verbose("--SWITCH on : %s\n", args);
mlen = strlen(exten) + 128 + strlen(args) + strlen(name);
margs = alloca(mlen);
app = "Goto";
sprintf(margs, "sw-%d-%s|1", *pos, args);
ast_process_quotes_and_slashes(margs, ',', '|');
oargs = args;
args = margs;
if (ast_add_extension2(con, 0, exten, *pos, *label, NULL, app, strdup(args), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of %s '%s'\n", *pos, what, name);
else {
*label = NULL;
(*pos)++;
}
app = "NoOp";
sprintf(margs, "Finish switch-%d", *pos - 1);
if (ast_add_extension2(con, 0, exten, *pos, *label, NULL, app, strdup(args), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of %s '%s'\n", *pos, what, name);
else {
*label = NULL;
(*pos)++;
}
c = ast_skip_blanks(c);
if (aeldebug & DEBUG_TOKENS)
ast_verbose("ARG Parsing '%s'\n", c);
swargs = arg_parse(c, filename, lineno);
cur = swargs;
curcase = NULL;
while(cur) {
if ((newcase = get_case(cur->data, &rest, &pattern))) {
if (aeldebug & DEBUG_TOKENS)
ast_verbose("--NEWCASE: '%s'!\n", newcase);
if (curcase) {
/* Handle fall through */
char tmp[strlen(newcase) + strlen(name) + 40];
sprintf(tmp, "sw-%d-%s|%d", *pos - 2, newcase, 1);
ast_add_extension2(con, 0, margs, cpos, NULL, NULL, "Goto", strdup(tmp), FREE, registrar);
}
curcase = newcase;
cpos = 1;
if (pattern)
snprintf(margs, mlen, "_sw-%d-%s", *pos - 2, curcase);
else
snprintf(margs, mlen, "sw-%d-%s", *pos - 2, curcase);
if (!strcasecmp(rest, "break")) {
char tmp[strlen(exten) + 10];
sprintf(tmp, "%s|%d", exten, *pos - 1);
ast_add_extension2(con, 0, exten, cpos, *label, NULL, "Goto", strdup(tmp), FREE, registrar);
curcase = NULL;
*label = NULL;
} else
build_step("switch", margs, filename, lineno, con, margs, &cpos, rest, &fillin, label);
} else if (curcase) {
if (aeldebug & DEBUG_TOKENS)
ast_verbose("Building statement from '%s'\n", rest);
if (!strcasecmp(rest, "break")) {
char tmp[strlen(exten) + 10];
sprintf(tmp, "%s|%d", exten, *pos - 1);
ast_add_extension2(con, 0, margs, cpos, *label, NULL, "Goto", strdup(tmp), FREE, registrar);
curcase = NULL;
*label = NULL;
} else
build_step("switch", margs, filename, lineno, con, margs, &cpos, rest, &fillin, label);
} else
ast_log(LOG_WARNING, "Unreachable code in switch at about line %d of %s\n", lineno, filename);
if (aeldebug & DEBUG_TOKENS)
ast_verbose("--SWARG: %s\n", cur->data);
cur = cur->next;
}
/* Can't do anything with these */
fillin_process(con, fillin, filename, lineno, NULL, 0, NULL, 0);
fillin_free(fillin);
arg_free(swargs);
} else
ast_log(LOG_WARNING, "Syntax error in switch declaration in %s around line %d!\n", filename, lineno);
} else if (matches_keyword(data, "if")) {
/* If... */
args = data + strlen("if");
while ((*args < 33) && (*args != '(')) args++;
if ((*args == '(') && (c = argument_end(args))) {
int ifblock;
int ifstart;
int elsestart;
int ifend;
int ifskip;
char *elses;
char *iflabel;
args++;
*c = '\0';
c++;
c = ast_skip_blanks(c);
if (aeldebug & DEBUG_TOKENS)
ast_verbose("--IF on : '%s' : '%s'\n", args, c);
mlen = strlen(exten) + 128 + strlen(args) + strlen(name);
margs = alloca(mlen);
/* Remember where the ifblock starts, and skip over */
ifblock = (*pos)++;
iflabel = *label;
*label = NULL;
/* Remember where the start of the ifblock is */
ifstart = *pos;
snprintf(margs, mlen, "if-%s-%d", name, ifblock);
/* Now process the block of the if */
if (aeldebug & DEBUG_TOKENS)
ast_verbose("Searching for elses in '%s'\n", c);
elses = grab_else(c, filename, lineno);
build_step("if", margs, filename, lineno, con, exten, pos, c, fillout, label);
if (elses) {
/* Reserve a goto to exit the if */
ifskip = *pos;
(*pos)++;
elsestart = *pos;
build_step("else", margs, filename, lineno, con, exten, pos, elses, fillout, label);
} else {
elsestart = *pos;
ifskip = 0;
}
ifend = *pos;
(*pos)++;
app = "NoOp";
snprintf(margs, mlen, "Finish if-%s-%d", name, ifblock);
if (ast_add_extension2(con, 0, exten, ifend, *label, NULL, app, strdup(margs), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of %s '%s'\n", *pos, what, name);
*label = NULL;
app = "GotoIf";
snprintf(margs, mlen, "$[ %s ]?%d:%d", args, ifstart, elsestart);
if (ast_add_extension2(con, 0, exten, ifblock, iflabel, NULL, app, strdup(margs), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of %s '%s'\n", *pos, what, name);
if (ifskip) {
/* Skip as appropriate around else clause */
snprintf(margs, mlen, "%d", ifend);
if (ast_add_extension2(con, 0, exten, ifskip, NULL, NULL, "Goto", strdup(margs), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of %s '%s'\n", *pos, what, name);
}
} else
ast_log(LOG_WARNING, "Syntax error in if declaration in %s around line %d!\n", filename, lineno);
} else if (matches_keyword(data, "while")) {
/* While... */
fillin = NULL;
args = data + strlen("while");
while ((*args < 33) && (*args != '(')) args++;
if ((*args == '(') && (c = argument_end(args))) {
int whileblock;
int whilestart;
int whileend;
char *whilelabel;
args++;
*c = '\0';
c++;
c = ast_skip_blanks(c);
if (aeldebug & DEBUG_TOKENS)
ast_verbose("--WHILE on : '%s' : '%s'\n", args, c);
mlen = strlen(exten) + 128 + strlen(args) + strlen(name);
margs = alloca(mlen);
/* Remember where to put the conditional, and keep its position */
whilestart = (*pos);
whilelabel = *label;
*label = NULL;
(*pos)++;
/* Remember where the whileblock starts */
whileblock = (*pos);
snprintf(margs, mlen, "while-%s-%d", name, whilestart);
build_step("while", margs, filename, lineno, con, exten, pos, c, &fillin, label);
/* Close the loop */
app = "Goto";
snprintf(margs, mlen, "%d", whilestart);
if (ast_add_extension2(con, 0, exten, (*pos)++, *label, NULL, app, strdup(margs), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of %s '%s'\n", *pos, what, name);
*label = NULL;
whileend = (*pos);
/* Place trailer */
app = "NoOp";
snprintf(margs, mlen, "Finish while-%s-%d", name, whilestart);
if (ast_add_extension2(con, 0, exten, (*pos)++, *label, NULL, app, strdup(margs), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of %s '%s'\n", *pos, what, name);
*label = NULL;
app = "GotoIf";
snprintf(margs, mlen, "$[ %s ]?%d:%d", args, whileblock, whileend);
if (ast_add_extension2(con, 0, exten, whilestart, whilelabel, NULL, app, strdup(margs), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of %s '%s'\n", *pos, what, name);
fillin_process(con, fillin, filename, lineno, exten, whileend, exten, whilestart);
fillin_free(fillin);
} else
ast_log(LOG_WARNING, "Syntax error in while declaration in %s around line %d!\n", filename, lineno);
} else if (matches_keyword(data, "jump")) {
char *p;
/* Jump... */
fillin = NULL;
args = data + strlen("jump");
args = ast_skip_blanks(args);
if (aeldebug & DEBUG_TOKENS)
ast_verbose("--JUMP to : '%s'\n", args);
p = strchr(args, ',');
if (p) {
*p = '\0';
p++;
} else
p = "1";
c = strchr(args, '@');
if (c) {
*c = '\0';
c++;
}
mlen = strlen(exten) + 128 + strlen(args) + strlen(name) + (c ? strlen(c) : 0);
margs = alloca(mlen);
if (c)
snprintf(margs, mlen, "%s|%s|%s", c,args, p);
else
snprintf(margs, mlen, "%s|%s", args, p);
app = "Goto";
if (ast_add_extension2(con, 0, exten, (*pos)++, *label, NULL, app, strdup(margs), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of %s '%s'\n", *pos, what, name);
*label = NULL;
} else if (matches_keyword(data, "goto")) {
/* Jump... */
fillin = NULL;
args = data + strlen("goto");
args = ast_skip_blanks(args);
if (aeldebug & DEBUG_TOKENS)
ast_verbose("--GOTO to : '%s'\n", args);
app = "Goto";
if (args[0] == '(' && args[strlen(args) - 1] == ')') {
args[0] = '\0';
args++;
args[strlen(args) - 1] = '\0';
}
if (ast_add_extension2(con, 0, exten, (*pos)++, *label, NULL, app, strdup(args), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of %s '%s'\n", *pos, what, name);
*label = NULL;
} else if (matches_keyword(data, "for")) {
/* While... */
fillin = NULL;
args = data + strlen("for");
while ((*args < 33) && (*args != '(')) args++;
if ((*args == '(') && (c = argument_end(args))) {
int forblock;
int forprep;
int forstart;
int forend;
struct stringlink *fields;
char *tmp;
char *forlabel = NULL;
args++;
*c = '\0';
c++;
c = ast_skip_blanks(c);
/* Parse arguments first */
tmp = alloca(strlen(args) + 10);
if (tmp) {
snprintf(tmp, strlen(args) + 10, "{%s;}", args);
fields = arg_parse(tmp, filename, lineno);
} else
fields = NULL;
if (fields && fields->next && fields->next->next) {
if (aeldebug & DEBUG_TOKENS)
ast_verbose("--FOR ('%s' ; '%s' ; '%s') : '%s'\n", fields->data, fields->next->data, fields->next->next->data, c);
mlen = strlen(exten) + 128 + strlen(args) + strlen(name);
margs = alloca(mlen);
forprep = *pos;
snprintf(margs, mlen, "for-%s-%d", name, forprep);
fillin = NULL;
build_step("while", margs, filename, lineno, con, exten, pos, fields->data, &fillin, label);
/* Remember where to put the conditional, and keep its position */
forstart = (*pos);
forlabel = *label;
(*pos)++;
*label = NULL;
/* Remember where the whileblock starts */
forblock = (*pos);
build_step("for", margs, filename, lineno, con, exten, pos, c, &fillin, label);
build_step("for", margs, filename, lineno, con, exten, pos, fields->next->next->data, &fillin, label);
/* Close the loop */
app = "Goto";
snprintf(margs, mlen, "%d", forstart);
if (ast_add_extension2(con, 0, exten, (*pos)++, *label, NULL, app, strdup(margs), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of %s '%s'\n", *pos, what, name);
*label = NULL;
forend = (*pos);
/* Place trailer */
app = "NoOp";
snprintf(margs, mlen, "Finish for-%s-%d", name, forprep);
if (ast_add_extension2(con, 0, exten, (*pos)++, *label, NULL, app, strdup(margs), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of %s '%s'\n", *pos, what, name);
*label = NULL;
app = "GotoIf";
snprintf(margs, mlen, "$[ %s ]?%d:%d", fields->next->data, forblock, forend);
if (ast_add_extension2(con, 0, exten, forstart, forlabel, NULL, app, strdup(margs), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of %s '%s'\n", forstart, what, name);
fillin_process(con, fillin, filename, lineno, exten, forend, exten, forstart);
fillin_free(fillin);
} else
ast_log(LOG_NOTICE, "Improper for declaration in %s around line %d!\n", filename, lineno);
arg_free(fields);
} else
ast_log(LOG_WARNING, "Syntax error in for declaration in %s around line %d!\n", filename, lineno);
} else if (!strcasecmp(data, "break") || !strcasecmp(data, "continue")) {
struct fillin *fi;
fi = malloc(sizeof(struct fillin));
if (fi) {
memset(fi, 0, sizeof(struct fillin));
if (!strcasecmp(data, "break"))
fi->type = FILLIN_BREAK;
else
fi->type = FILLIN_CONTINUE;
ast_copy_string(fi->exten, exten, sizeof(fi->exten));
fi->priority = (*pos)++;
fi->next = *fillout;
*fillout = fi;
}
} else if (match_assignment(data, &rest)) {
if (aeldebug & DEBUG_TOKENS)
ast_verbose("ASSIGN '%s' = '%s'\n", data, rest);
mlen = strlen(rest) + strlen(data) + 20;
margs = alloca(mlen);
snprintf(margs, mlen, "%s=$[ %s ]", data, rest);
app = "Set";
if (ast_add_extension2(con, 0, exten, *pos, *label, NULL, app, strdup(margs), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add assignment at priority '%d' of %s '%s'\n", *pos, what, name);
else {
*label = NULL;
(*pos)++;
}
} else {
app = data;
args = app;
while (*args && (*args > 32) && (*args != '(')) args++;
if (*args != '(') {
while(*args && (*args != '(')) { *args = '\0'; args++; };
}
if (*args == '(') {
*args = '\0';
args++;
/* Got arguments, trim trailing ')' */
c = args + strlen(args) - 1;
while((c >= args) && (*c < 33) && (*c != ')')) { *c = '\0'; c--; };
if ((c >= args) && (*c == ')')) *c = '\0';
} else
args = "";
ast_process_quotes_and_slashes(args, ',', '|');
if (app[0] == '&') {
app++;
margs = alloca(strlen(args) + strlen(app) + 10);
sprintf(margs, "%s|%s", app, args);
args = margs;
app = "Macro";
}
if (aeldebug & DEBUG_TOKENS)
ast_verbose("-- APP: '%s', ARGS: '%s'\n", app, args);
if (ast_add_extension2(con, 0, exten, *pos, *label, NULL, app, strdup(args), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of %s '%s'\n", *pos, what, name);
else {
(*pos)++;
*label = NULL;
}
}
return 0;
}
static int build_step(const char *what, const char *name, const char *filename, int lineno, struct ast_context *con, char *exten, int *pos, char *data, struct fillin **fillout, char **label)
{
struct stringlink *args, *cur;
int res=0;
struct fillin *fillin=NULL;
int dropfill = 0;
char *labelin = NULL;
if (!fillout) {
fillout = &fillin;
dropfill = 1;
}
if (!label) {
label = &labelin;
};
args = arg_parse(data, filename, lineno);
cur = args;
while(cur) {
res |= __build_step(what, name, filename, lineno, con, exten, pos, cur->data, fillout, label);
cur = cur->next;
}
arg_free(args);
if (dropfill) {
fillin_process(con, fillin, filename, lineno, NULL, 0, NULL, 0);
fillin_free(fillin);
}
return res;
}
static int parse_catch(char *data, char **catch, char **rest)
{
/* Skip the word 'catch' */
data += 5;
data = ast_skip_blanks(data);
/* Here's the extension */
*catch = data;
if (!*data)
return 0;
while (*data && (*data > 32)) data++;
if (!*data)
return 0;
/* Trim any trailing spaces */
*data = '\0';
data++;
data = ast_skip_blanks(data);
if (!*data)
return 0;
*rest = data;
return 1;
}
static void handle_macro(struct ast_context **local_contexts, struct stringlink *vars, const char *filename, int lineno)
{
struct stringlink *argv;
struct stringlink *paramv;
struct stringlink *cur;
struct ast_context *con;
struct fillin *fillin;
char *catch, *rest;
char name[256];
int pos;
int cpos;
if (aeldebug & DEBUG_MACROS)
ast_verbose("Root macro def is '%s'\n", vars->data);
argv = split_token(vars->data, filename, lineno);
paramv = split_params(vars->data, filename, lineno);
if (aeldebug & DEBUG_MACROS)
ast_verbose("Found macro '%s'\n", vars->data);
snprintf(name, sizeof(name), "macro-%s", vars->data);
con = ast_context_create(local_contexts, name, registrar);
if (con) {
pos = 1;
cur = paramv;
while(cur) {
if (aeldebug & DEBUG_MACROS)
ast_verbose(" PARAM => '%s'\n", cur->data);
snprintf(name, sizeof(name), "%s=${ARG%d}", cur->data, pos);
if (ast_add_extension2(con, 0, "s", pos, NULL, NULL, "Set", strdup(name), FREE, registrar))
ast_log(LOG_WARNING, "Unable to add step at priority '%d' of macro '%s'\n", pos, vars->data);
else
pos++;
cur = cur->next;
}
cur = argv;
while(cur) {
if (aeldebug & DEBUG_MACROS)
ast_verbose(" STEP => '%s'\n", cur->data);
if (matches_keyword(cur->data, "catch")) {
if (aeldebug & DEBUG_MACROS)
ast_verbose("--CATCH: '%s'\n", cur->data);
if (parse_catch(cur->data, &catch, &rest)) {
cpos = 1;
build_step("catch", catch, filename, lineno, con, catch, &cpos, rest, NULL, NULL);
} else
ast_log(LOG_NOTICE, "Parse error for catch at about line %d of %s\n", lineno, filename);
} else {
fillin = NULL;
build_step("macro", vars->data, filename, lineno, con, "s", &pos, cur->data, NULL, NULL);
}
cur = cur->next;
}
} else
ast_log(LOG_WARNING, "Unable to create context '%s'\n", name);
arg_free(paramv);
arg_free(argv);
if (vars->next)
ast_log(LOG_NOTICE, "Ignoring excess tokens in macro definition around line %d of %s!\n", lineno, filename);
}
static int matches_extension(char *exten, char **extout)
{
char *c;
*extout = NULL;
c = exten;
while(*c && (*c > 32)) c++;
if (*c) {
*c = '\0';
c++;
c = ast_skip_blanks(c);
if (*c) {
if (*c == '=') {
*c = '\0';
c++;
if (*c == '>')
c++;
c = ast_skip_blanks(c);
*extout = c;
return 1;
}
}
}
return 0;
}
static void parse_keyword(char *s, char **o)
{
char *c;
c = s;
while((*c) && (*c > 32)) c++;
if (*c) {
*c = '\0';
c++;
c = ast_skip_blanks(c);
*o = c;
} else
*o = NULL;
}
static void handle_context(struct ast_context **local_contexts, struct stringlink *vars, const char *filename, int lineno)
{
struct stringlink *argv;
struct stringlink *cur2;
struct stringlink *argv2;
struct stringlink *cur;
struct ast_context *con;
char *rest;
char *c;
char name[256];
int pos;
if (aeldebug & DEBUG_CONTEXTS)
ast_verbose("Root context def is '%s'\n", vars->data);
argv = split_token(vars->data, filename, lineno);
if (aeldebug & DEBUG_CONTEXTS)
ast_verbose("Found context '%s'\n", vars->data);
snprintf(name, sizeof(name), "%s", vars->data);
con = ast_context_create(local_contexts, name, registrar);
if (con) {
cur = argv;
while(cur) {
if (matches_keyword(cur->data, "includes")) {
if (aeldebug & DEBUG_CONTEXTS)
ast_verbose("--INCLUDES: '%s'\n", cur->data);
parse_keyword(cur->data, &rest);
if (rest) {
argv2 = arg_parse(rest, filename, lineno);
cur2 = argv2;
while(cur2) {
ast_context_add_include2(con, cur2->data, registrar);
cur2 = cur2->next;
}
arg_free(argv2);
}
} else if (matches_keyword(cur->data, "ignorepat")) {
if (aeldebug & DEBUG_CONTEXTS)
ast_verbose("--IGNOREPAT: '%s'\n", cur->data);
parse_keyword(cur->data, &rest);
if (rest) {
argv2 = arg_parse(rest, filename, lineno);
cur2 = argv2;
while(cur2) {
ast_context_add_ignorepat2(con, cur2->data, registrar);
cur2 = cur2->next;
}
arg_free(argv2);
}
} else if (matches_keyword(cur->data, "switches") || matches_keyword(cur->data, "eswitches")) {
if (aeldebug & DEBUG_CONTEXTS)
ast_verbose("--[E]SWITCH: '%s'\n", cur->data);
parse_keyword(cur->data, &rest);
if (rest) {
argv2 = arg_parse(rest, filename, lineno);
cur2 = argv2;
while(cur2) {
c = strchr(cur2->data, '/');
if (c) {
*c = '\0';
c++;
} else
c = "";
ast_context_add_switch2(con, cur2->data, c, (cur->data[0] == 'e'), registrar);
cur2 = cur2->next;
}
arg_free(argv2);
}
} else if (matches_extension(cur->data, &rest)) {
if (aeldebug & DEBUG_CONTEXTS)
ast_verbose("Extension: '%s' => '%s'\n", cur->data, rest);
pos = 1;
build_step("extension", cur->data, filename, lineno, con, cur->data, &pos, rest, NULL, NULL);
}
cur = cur->next;
}
} else
ast_log(LOG_WARNING, "Unable to create context '%s'\n", name);
arg_free(argv);
if (vars->next)
ast_log(LOG_NOTICE, "Ignoring excess tokens in macro definition around line %d of %s!\n", lineno, filename);
}
static int handle_root_token(struct ast_context **local_contexts, char *token, int level, const char *filename, int lineno)
{
struct stringlink *argv, *cur;
argv = split_token(token, filename, lineno);
if (aeldebug & DEBUG_TOKENS) {
ast_verbose("Found root token '%s' at level %d (%s:%d)!\n", token, level, filename, lineno);
cur = argv;
while(cur) {
ast_verbose(" ARG => '%s'\n", cur->data);
cur = cur->next;
}
}
if (!strcasecmp(token, "globals")) {
handle_globals(argv);
} else if (!strcasecmp(token, "macro")) {
handle_macro(local_contexts, argv, filename, lineno);
} else if (!strcasecmp(token, "context")) {
handle_context(local_contexts, argv, filename, lineno);
} else {
ast_log(LOG_NOTICE, "Unknown root token '%s'\n", token);
}
arg_free(argv);
return 0;
}
static int ast_ael_compile(struct ast_context **local_contexts, const char *filename)
{
char *rfilename;
char *buf, *tbuf;
int bufsiz;
FILE *f;
char *c;
char *token;
int lineno=0;
if (filename[0] == '/')
rfilename = (char *)filename;
else {
rfilename = alloca(strlen(filename) + strlen(ast_config_AST_CONFIG_DIR) + 2);
sprintf(rfilename, "%s/%s", ast_config_AST_CONFIG_DIR, filename);
}
f = fopen(rfilename, "r");
if (!f) {
ast_log(LOG_WARNING, "Unable to open '%s': %s\n", rfilename, strerror(errno));
return -1;
}
buf = malloc(4096);
if (!buf) {
ast_log(LOG_WARNING, "Out of memory!\n");
fclose(f);
return -1;
}
buf[0] = 0;
bufsiz = 4096;
while(!feof(f)) {
if (bufsiz - strlen(buf) < 2048) {
bufsiz += 4096;
tbuf = realloc(buf, bufsiz);
if (tbuf) {
buf = tbuf;
} else {
free(buf);
ast_log(LOG_WARNING, "Out of memory!\n");
fclose(f);
}
}
if (fgets(buf + strlen(buf), bufsiz - strlen(buf), f)) {
lineno++;
while(*buf && buf[strlen(buf) - 1] < 33)
buf[strlen(buf) - 1] = '\0';
c = strstr(buf, "//");
if (c)
*c = '\0';
if (*buf) {
if (aeldebug & DEBUG_READ)
ast_verbose("Newly composed line '%s'\n", buf);
while((token = grab_token(buf, filename, lineno))) {
handle_root_token(local_contexts, token, 0, filename, lineno);
free(token);
}
}
}
};
free(buf);
fclose(f);
return 0;
}
static int pbx_load_module(void)
{
struct ast_context *local_contexts=NULL, *con;
ast_ael_compile(&local_contexts, config);
ast_merge_contexts_and_delete(&local_contexts, registrar);
for (con = ast_walk_contexts(NULL); con; con = ast_walk_contexts(con))
ast_context_verify_includes(con);
return 0;
}
/* CLI interface */
static int ael_debug_read(int fd, int argc, char *argv[])
{
aeldebug |= DEBUG_READ;
return 0;
}
static int ael_debug_tokens(int fd, int argc, char *argv[])
{
aeldebug |= DEBUG_TOKENS;
return 0;
}
static int ael_debug_macros(int fd, int argc, char *argv[])
{
aeldebug |= DEBUG_MACROS;
return 0;
}
static int ael_debug_contexts(int fd, int argc, char *argv[])
{
aeldebug |= DEBUG_CONTEXTS;
return 0;
}
static int ael_no_debug(int fd, int argc, char *argv[])
{
aeldebug = 0;
return 0;
}
static int ael_reload(int fd, int argc, char *argv[])
{
ast_context_destroy(NULL, registrar);
return (pbx_load_module());
}
static struct ast_cli_entry ael_cli[] = {
{ { "ael", "reload", NULL }, ael_reload, "Reload AEL configuration"},
{ { "ael", "debug", "read", NULL }, ael_debug_read, "Enable AEL read debug"},
{ { "ael", "debug", "tokens", NULL }, ael_debug_tokens, "Enable AEL tokens debug"},
{ { "ael", "debug", "macros", NULL }, ael_debug_macros, "Enable AEL macros debug"},
{ { "ael", "debug", "contexts", NULL }, ael_debug_contexts, "Enable AEL contexts debug"},
{ { "ael", "no", "debug", NULL }, ael_no_debug, "Disable AEL debug messages"},
};
/*
* Standard module functions ...
*/
int unload_module(void)
{
ast_context_destroy(NULL, registrar);
ast_cli_unregister_multiple(ael_cli, sizeof(ael_cli)/ sizeof(ael_cli[0]));
return 0;
}
int load_module(void)
{
ast_cli_register_multiple(ael_cli, sizeof(ael_cli)/ sizeof(ael_cli[0]));
return (pbx_load_module());
}
int reload(void)
{
ast_context_destroy(NULL, registrar);
return pbx_load_module();
}
int usecount(void)
{
return 0;
}
char *description(void)
{
return dtext;
}
char *key(void)
{
return ASTERISK_GPL_KEY;
}
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