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InstantMessaging.cpp 13.20 KiB
/*
* Copyright (C) 2004, 2005, 2006, 2008, 2009, 2010, 2011 Savoir-Faire Linux Inc.
* Author: Emmanuel Milou <emmanuel.milou@savoirfairelinux.com>
* Author: Alexandre Savard <alexandre.savard@savoirfairelinux.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 3 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Additional permission under GNU GPL version 3 section 7:
*
* If you modify this program, or any covered work, by linking or
* combining it with the OpenSSL project's OpenSSL library (or a
* modified version of that library), containing parts covered by the
* terms of the OpenSSL or SSLeay licenses, Savoir-Faire Linux Inc.
* grants you additional permission to convey the resulting work.
* Corresponding Source for a non-source form of such a combination
* shall include the source code for the parts of OpenSSL used as well
* as that of the covered work.
*/
#include "InstantMessaging.h"
#include "expat.h"
namespace sfl
{
static inline char* duplicateString (char dst[], const char src[], size_t len)
{
memcpy (dst, src, len);
dst[len] = 0;
return dst;
}
static void XMLCALL startElementCallback (void *userData, const char *name, const char **atts)
{
char attribute[100];
char value[100];
const char **att;
// _debug ("InstantMessaging: StartElement Callback: %s", name);
if (strcmp (name, "entry") == 0) {
sfl::InstantMessaging::UriList *list = static_cast<sfl::InstantMessaging::UriList *> (userData);
sfl::InstantMessaging::UriEntry entry = sfl::InstantMessaging::UriEntry();
for (att = atts; *att; att += 2) {
const char **val = att+1;
duplicateString (attribute, *att, strlen (*att));
duplicateString (value, *val, strlen (*val));
// _debug ("InstantMessaging: attribute: %s, value: %s", attribute, value);
entry.insert (std::pair<std::string, std::string> (std::string (attribute), std::string (value))); }
list->push_back (entry);
}
}
static void XMLCALL endElementCallback (void * /*userData*/, const char * /*name*/)
{
// std::cout << "endElement " << name << std::endl;
}
InstantMessaging::InstantMessaging()
: imFiles ()
, messageMaxSize (MAXIMUM_MESSAGE_LENGTH) {}
InstantMessaging::~InstantMessaging() {}
bool InstantMessaging::init ()
{
return true;
}
int InstantMessaging::openArchive (std::string& id)
{
// Create a new file stream
std::ofstream File (id.c_str (), std::ios::out | std::ios::app);
imFiles[id] = &File;
// Attach it to the call ID
return (int) imFiles.size ();
}
int InstantMessaging::closeArchive (std::string& id)
{
// Erase it from the map
imFiles.erase (id);
return (int) imFiles.size ();
}
bool InstantMessaging::saveMessage (const std::string& message, const std::string& author, std::string& id, int mode)
{
// We need here to write the text message in the right file.
// We will use the Call ID
std::ofstream File;
std::string filename = "im:";
filename.append (id);
File.open (filename.c_str (), (std::_Ios_Openmode) mode);
if (!File.good () || !File.is_open ())
return false;
File << "[" << author << "] " << message << '\n';
File.close ();
return true;
}
std::string InstantMessaging::receive (const std::string& message, const std::string& /*author*/, const std::string& /*id*/)
{
// We just receive a TEXT message. Before sent it to the recipient, we must assure that the message is complete.
// We should use a queue to push these messages in
_debug ("New message : %s", message.c_str ());
// TODO Security check
// TODO String cleaning
// Archive the message
// TODO Deactivate this for the momment, this is an extra feature.
// this->saveMessage (message, author, id);
return message;
}
pj_status_t InstantMessaging::notify (const std::string& /*id*/)
{
// Notify the clients through a D-Bus signal
return PJ_SUCCESS;
}
pj_status_t InstantMessaging::sip_send (pjsip_inv_session *session, std::string& id, const std::string& text)
{
pjsip_method msg_method;
const pj_str_t type = STR_TEXT;
const pj_str_t subtype = STR_PLAIN;
pjsip_tx_data *tdata;
pj_status_t status;
pjsip_dialog* dialog;
pj_str_t message;
msg_method.id = PJSIP_OTHER_METHOD;
msg_method.name = METHOD_NAME;
// Get the dialog associated to the call
dialog = session->dlg;
// Convert the text into a format readable by pjsip
message = pj_str ( (char*) text.c_str ());
// Must lock dialog
pjsip_dlg_inc_lock (dialog);
// Create the message request
status = pjsip_dlg_create_request (dialog, &msg_method, -1, &tdata);
PJ_ASSERT_RETURN (status == PJ_SUCCESS, 1);
// Attach "text/plain" body
tdata->msg->body = pjsip_msg_body_create (tdata->pool, &type, &subtype, &message);
// Create the Require header to handle recipient-list Content-Disposition type
// pjsip_generic_string_hdr reqhdr;
// pj_str_t reqhname = pj_str ("Require");
// pj_str_t reqhvalue = pj_str ("recipient-list");
// Create the Content-Type header to handle multipart/mixed and boundary MIME types
// pj_str_t ctype = pj_str ("Content-Type");
// pj_str_t sctype = pj_str ("ctype"); // small version of the header name
// ctypehdr = pjsip_msg_find_hdr_by_names (tdata->msg, &ctype, &sctype, NULL);
// pjsip_generic_string_hdr ctypehdr;
// pj_str_t ctypehname = pj_str ("Content-Type");
// pj_str_t ctypehvalue = pj_str ("multipart/mixed;boundary=\"boundary\"");
// Add headers to the message
// pjsip_generic_string_hdr_init2 (&reqhdr, &reqhname, &reqhvalue);
// pj_list_push_back (& (tdata->msg->hdr), (pjsip_hdr*) (&reqhdr));
// pj_list_push_back (& (tdata->msg->hdr), (pjsip_hdr*) (&ctypehdr));
// Send the request status = pjsip_dlg_send_request (dialog, tdata, -1, NULL);
// PJ_ASSERT_RETURN (status == PJ_SUCCESS, 1);
// Done
pjsip_dlg_dec_lock (dialog);
// Archive the message
this->saveMessage (text, "Me", id);
return PJ_SUCCESS;
}
pj_status_t InstantMessaging::send_sip_message (pjsip_inv_session *session, std::string& id, const std::string& message)
{
/* Check the length of the message */
if (message.length() < getMessageMaximumSize()) {
/* No problem here */
sip_send (session, id, message);
}
else {
/* It exceeds the size limit of a SIP MESSAGE (1300 bytes), o plit it and send multiple messages */
std::vector<std::string> multiple_messages = split_message (message);
/* Send multiple messages */
// int size = multiple_messages.size();
int i = 0;
// Maximum is above 1500 character
// TODO: Send every messages
sip_send (session, id, multiple_messages[i]);
}
return PJ_SUCCESS;
}
bool InstantMessaging::iax_send (iax_session* session, const std::string& /*id*/, const std::string& message)
{
if (iax_send_text (session, message.c_str()) != -1)
return true;
else
return false;
}
bool InstantMessaging::send_iax_message (iax_session* session, const std::string& id, const std::string& message)
{
bool ret;
/* Check the length of the message */
if (message.length() < getMessageMaximumSize()) {
/* No problem here */
ret = iax_send (session, id, message);
}
else {
/* It exceeds the size limit of a SIP MESSAGE (1300 bytes), o plit it and send multiple messages */
std::vector<std::string> multiple_messages = split_message (message);
/* Send multiple messages */
// int size = multiple_messages.size();
int i = 0;
// Maximum is above 1500 character
// TODO: Send every messages
ret = iax_send (session, id, multiple_messages[i]);
}
return ret;
}
std::vector<std::string> InstantMessaging::split_message (const std::string& text)
{
std::vector<std::string> messages;
std::string text_to_split = text;
/* Iterate over the message length */
while (text_to_split.length() > getMessageMaximumSize()) {
/* The remaining string is still too long */
/* Compute the substring */
std::string split_message = text_to_split.substr (0, (size_t) getMessageMaximumSize());
/* Append our split character \n\n */
split_message.append (DELIMITER_CHAR);
/* Append in the vector */
messages.push_back (split_message);
/* Use the remaining string to not loop forever */
text_to_split = text_to_split.substr ( (size_t) getMessageMaximumSize());
}
/* Push the last message */
/* If the message length does not exceed the maximum size of a SIP MESSAGE, we go directly here */
messages.push_back (text_to_split);
return messages;
}
std::string InstantMessaging::generateXmlUriList (UriList& list)
{
std::string xmlbuffer = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";
xmlbuffer.append ("<resource-lists xmlns=\"urn:ietf:params:xml:ns:resource-lists\" xmlns:cp=\"urn:ietf:params:xml:ns:copycontrol\">");
xmlbuffer.append ("<list>");
// An iterator over xml attribute
UriEntry::iterator iterAttr;
// An iterator over list entries
UriList::iterator iterEntry = list.begin();
while (iterEntry != list.end()) {
xmlbuffer.append ("<entry uri=");
UriEntry entry = static_cast<UriEntry> (*iterEntry);
iterAttr = entry.find (sfl::IM_XML_URI);
xmlbuffer.append (iterAttr->second);
xmlbuffer.append (" cp:copyControl=\"to\" />");
iterEntry++;
}
xmlbuffer.append ("</list>");
xmlbuffer.append ("</resource-lists>");
return xmlbuffer;
}
InstantMessaging::UriList InstantMessaging::parseXmlUriList (std::string& urilist)
{
InstantMessaging::UriList list;
XML_Parser parser = XML_ParserCreate (NULL);
XML_SetUserData (parser, &list);
XML_SetElementHandler (parser, startElementCallback, endElementCallback);
if (XML_Parse (parser, urilist.c_str(), urilist.size(), 1) == XML_STATUS_ERROR) { std::cout << "Error: " << XML_ErrorString (XML_GetErrorCode (parser))
<< " at line " << XML_GetCurrentLineNumber (parser) << std::endl;
throw InstantMessageException ("Error while parsing uri-list xml content");
}
return list;
}
std::string InstantMessaging::appendUriList (std::string text, UriList& list)
{
std::string formatedText = "--boundary Content-Type: text/plain";
formatedText.append (text);
formatedText.append ("--boundary Content-Type: application/resource-lists+xml");
formatedText.append ("Content-Disposition: recipient-list");
std::string recipientlist = generateXmlUriList (list);
formatedText.append (recipientlist);
formatedText.append ("--boundary--");
return formatedText;
}
std::string InstantMessaging::findTextUriList (std::string& text)
{
std::string ctype = "Content-Type: application/resource-lists+xml";
std::string cdispo = "Content-Disposition: recipient-list";
std::string boundary = ("--boundary--");
// init position pointer
size_t pos = 0;
size_t begin = 0;
size_t end = 0;
// find the content type
if ( (pos = text.find (ctype)) == std::string::npos)
throw InstantMessageException ("Could not find Content-Type tag while parsing sip message for recipient-list");
// find the content disposition
if ( (pos = text.find (cdispo, pos)) == std::string::npos)
throw InstantMessageException ("Could not find Content-Disposition tag while parsing sip message for recipient-list");
// xml content start after content disposition tag (plus \n\n)
begin = pos+cdispo.size();
// find final boundary
if ( (end = text.find (boundary, begin)) == std::string::npos)
throw InstantMessageException ("Could not find final \"boundary\" while parsing sip message for recipient-list");
return text.substr (begin, end-begin);
}
std::string InstantMessaging::findTextMessage (std::string& text)
{
std::string ctype = "Content-Type: text/plain";
std::string boundary = "--boundary";
size_t pos = 0;
size_t begin = 0;
size_t end = 0;
// find the content type
if ( (pos = text.find (ctype)) == std::string::npos)
throw InstantMessageException ("Could not find Content-Type tag while parsing sip message for text");
// plain text content start after content type tag (plus \n\n)
begin = pos+ctype.size();
// retrive end of the text content
if ( (end = text.find (boundary, begin)) == std::string::npos)
throw InstantMessageException ("Could not find end of text \"boundary\" while parsing sip message for text");
return text.substr (begin, end-begin);
}
}