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249 lines
6.5 KiB
249 lines
6.5 KiB
/*
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* Copyright (C) 2010 Stefan Sayer
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*
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* This file is part of SEMS, a free SIP media server.
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*
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* SEMS is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* For a license to use the SEMS software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* SEMS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "ParamReplacer.h"
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#include "log.h"
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#include "AmSipHeaders.h"
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#include "AmUtils.h"
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void replaceParsedParam(const string& s, size_t p,
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AmUriParser& parsed, string& res) {
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switch (s[p+1]) {
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case 'u': { // URI
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res+=parsed.uri_user+"@"+parsed.uri_host;
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if (!parsed.uri_port.empty())
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res+=":"+parsed.uri_port;
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} break;
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case 'U': res+=parsed.uri_user; break; // User
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case 'd': { // domain
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res+=parsed.uri_host;
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if (!parsed.uri_port.empty())
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res+=":"+parsed.uri_port;
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} break;
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case 'h': res+=parsed.uri_host; break; // host
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case 'p': res+=parsed.uri_port; break; // port
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case 'H': res+=parsed.uri_headers; break; // Headers
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case 'P': res+=parsed.uri_param; break; // Params
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default: WARN("unknown replace pattern $%c%c\n",
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s[p], s[p+1]); break;
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};
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}
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string replaceParameters(const string& s,
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const char* r_type,
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const AmSipRequest& req,
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const string& app_param,
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AmUriParser& ruri_parser, AmUriParser& from_parser,
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AmUriParser& to_parser) {
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string res;
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bool is_replaced = false;
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size_t p = 0;
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char last_char=' ';
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while (p<s.length()) {
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size_t skip_chars = 1;
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if (last_char=='\\') {
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res += s[p];
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is_replaced = true;
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} else if (s[p]=='\\') {
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if (p==s.length()-1)
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res += s[p];
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} else if ((s[p]=='$') && (s.length() >= p+1)) {
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is_replaced = true;
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p++;
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switch (s[p]) {
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case 'f': { // from
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if ((s.length() == p+1) || (s[p+1] == '.')) {
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res += req.from;
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break;
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}
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if (from_parser.uri.empty()) {
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from_parser.uri = req.from;
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if (!from_parser.parse_uri()) {
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WARN("Error parsing From URI '%s'\n", req.from.c_str());
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break;
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}
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}
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replaceParsedParam(s, p, from_parser, res);
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}; break;
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case 't': { // to
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if ((s.length() == p+1) || (s[p+1] == '.')) {
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res += req.to;
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break;
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}
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if (to_parser.uri.empty()) {
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to_parser.uri = req.to;
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if (!to_parser.parse_uri()) {
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WARN("Error parsing To URI '%s'\n", req.to.c_str());
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break;
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}
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}
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replaceParsedParam(s, p, to_parser, res);
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}; break;
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case 'r': { // r-uri
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if ((s.length() == p+1) || (s[p+1] == '.')) {
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res += req.r_uri;
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break;
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}
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if (ruri_parser.uri.empty()) {
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ruri_parser.uri = req.r_uri;
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if (!ruri_parser.parse_uri()) {
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WARN("Error parsing R-URI '%s'\n", req.r_uri.c_str());
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break;
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}
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}
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replaceParsedParam(s, p, ruri_parser, res);
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}; break;
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case 'c': { // call-id
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if ((s.length() == p+1) || (s[p+1] == 'i')) {
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res += req.callid;
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break;
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}
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WARN("unknown replacement $c%c\n", s[p+1]);
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}
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#define case_HDR(pv_char, pv_name, hdr_name) \
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case pv_char: { \
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AmUriParser uri_parser; \
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uri_parser.uri = getHeader(req.hdrs, hdr_name); \
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if ((s.length() == p+1) || (s[p+1] == '.')) { \
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res += uri_parser.uri; \
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break; \
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} \
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\
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if (!uri_parser.parse_uri()) { \
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WARN("Error parsing " pv_name " URI '%s'\n", uri_parser.uri.c_str()); \
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break; \
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} \
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if (s[p+1] == 'i') { \
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res+=uri_parser.uri_user+"@"+uri_parser.uri_host; \
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if (!uri_parser.uri_port.empty()) \
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res+=":"+uri_parser.uri_port; \
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} else { \
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replaceParsedParam(s, p, uri_parser, res); \
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} \
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}; break;
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case_HDR('a', "PAI", SIP_HDR_P_ASSERTED_IDENTITY); // P-Asserted-Identity
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case_HDR('p', "PPI", SIP_HDR_P_PREFERRED_IDENTITY); // P-Preferred-Identity
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case 'P': { // app-params
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if (s[p+1] != '(') {
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WARN("Error parsing P param replacement (missing '(')\n");
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break;
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}
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if (s.length()<p+3) {
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WARN("Error parsing P param replacement (short string)\n");
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break;
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}
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size_t skip_p = p+2;
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for (;skip_p<s.length() && s[skip_p] != ')';skip_p++) { }
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if (skip_p==s.length()) {
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WARN("Error parsing P param replacement (unclosed brackets)\n");
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break;
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}
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string param_name = s.substr(p+2, skip_p-p-2);
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// DBG("param_name = '%s' (skip-p - p = %d)\n", param_name.c_str(), skip_p-p);
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res += get_header_keyvalue(app_param, param_name);
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skip_chars = skip_p-p;
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} break;
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case 'H': { // header
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size_t name_offset = 2;
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if (s[p+1] != '(') {
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if (s[p+2] != '(') {
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WARN("Error parsing H header replacement (missing '(')\n");
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break;
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}
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name_offset = 3;
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}
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if (s.length()<name_offset+1) {
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WARN("Error parsing H header replacement (short string)\n");
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break;
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}
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size_t skip_p = p+name_offset;
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for (;skip_p<s.length() && s[skip_p] != ')';skip_p++) { }
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if (skip_p==s.length()) {
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WARN("Error parsing H header replacement (unclosed brackets)\n");
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break;
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}
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string hdr_name = s.substr(p+name_offset, skip_p-p-name_offset);
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// DBG("param_name = '%s' (skip-p - p = %d)\n", param_name.c_str(), skip_p-p);
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if (name_offset == 2) {
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// full header
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res += getHeader(req.hdrs, hdr_name);
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} else {
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// parse URI and use component
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AmUriParser uri_parser;
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uri_parser.uri = getHeader(req.hdrs, hdr_name);
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if ((s[p+1] == '.')) {
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res += uri_parser.uri;
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break;
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}
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if (!uri_parser.parse_uri()) {
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WARN("Error parsing header %s URI '%s'\n",
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hdr_name.c_str(), uri_parser.uri.c_str());
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break;
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}
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replaceParsedParam(s, p, uri_parser, res);
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}
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skip_chars = skip_p-p;
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} break;
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default: {
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WARN("unknown replace pattern $%c%c\n",
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s[p], s[p+1]);
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}; break;
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};
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p+=skip_chars; // skip $.X
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} else {
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res += s[p];
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}
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last_char = s[p];
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p++;
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}
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if (is_replaced) {
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DBG("%s pattern replace: '%s' -> '%s'\n", r_type, s.c_str(), res.c_str());
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}
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return res;
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}
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