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/*
Copyright (C) 2005-2009 Michel de Boer <michel@twinklephone.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "parse_ctrl.h"
#include "protocol.h"
#include "util.h"
#include "audits/memman.h"
// Interface to Bison
extern int yyparse(void);
// Interface to Flex
struct yy_buffer_state;
extern struct yy_buffer_state *yy_scan_string(const char *);
extern void yy_delete_buffer(struct yy_buffer_state *);
t_mutex t_parser::mtx_parser;
bool t_parser::check_max_forwards = true;
bool t_parser::compact_headers = false;
bool t_parser::multi_values_as_list = true;
int t_parser::comment_level = 0;
list<string> t_parser::parse_errors;
string t_parser::unfold(const string &h) {
string::size_type i;
string s = h;
while ((i = s.find("\r\n ")) != string::npos) {
s.replace(i, 3, " ");
}
while ((i = s.find("\r\n\t")) != string::npos) {
s.replace(i, 3, " ");
}
// This is only for easy testing of hand edited messages
// in Linux where the end of line character is \n only.
while ((i = s.find("\n ")) != string::npos) {
s.replace(i, 2, " ");
}
while ((i = s.find("\n\t")) != string::npos) {
s.replace(i, 2, " ");
}
return s;
}
t_parser::t_context t_parser::context = t_parser::X_INITIAL;
t_sip_message *t_parser::msg = NULL;
t_sip_message *t_parser::parse(const string &s, list<string> &parse_errors_) {
t_mutex_guard guard(mtx_parser);
int ret;
struct yy_buffer_state *b;
msg = NULL;
parse_errors.clear();
string x = unfold(s);
b = yy_scan_string(x.c_str());
ret = yyparse();
yy_delete_buffer(b);
if (ret != 0) {
if (msg) {
MEMMAN_DELETE(msg);
delete msg;
msg = NULL;
}
throw ret;
}
parse_errors_ = parse_errors;
return msg;
}
t_sip_message *t_parser::parse_headers(const string &s, list<string> &parse_errors_) {
string msg("INVITE sip:fake@fake.invalid SIP/2.0");
msg += CRLF;
list<t_parameter> hdr_list = str2param_list(s);
for (list<t_parameter>::iterator i = hdr_list.begin();
i != hdr_list.end(); i++)
{
msg += unescape_hex(i->name);
msg += ": ";
msg += unescape_hex(i->value);
msg += CRLF;
}
msg += CRLF;
return parse(msg, parse_errors_);
}
void t_parser::enter_ctx_comment(void) {
comment_level = 0;
context = t_parser::X_COMMENT;
}
void t_parser::inc_comment_level(void) {
comment_level++;
}
bool t_parser::dec_comment_level(void) {
if (comment_level == 0) return false;
comment_level--;
return true;
}
void t_parser::add_header_error(const string &header_name) {
string s = "Parse error in header: " + header_name;
parse_errors.push_back(s);
}
t_syntax_error::t_syntax_error(const string &e) {
error = e;
}
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