static void xmpp_features_cb_ ( const char *msg_id, const char *msg, void *args )
{
/* Answer :
<stream:features>
<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'>
<required/>
</starttls>
<mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>
<mechanism>WARFACE</mechanism>
</mechanisms>
</stream:features>
*/
if ( msg == NULL )
return;
struct cb_args *a = ( struct cb_args * ) args;
#ifdef USE_TLS
if ( strstr ( msg, "<starttls" ) != NULL )
{
xmpp_starttls ( a->login, a->password, a->f, a->args );
}
else
#endif /* USE_TLS */
{
xmpp_sasl ( a->login, a->password, a->f, a->args );
}
free ( a->login );
free ( a->password );
free ( a );
}
static int
stream_handler(int x, void *user)
{
struct xmpp *xmpp = (struct xmpp *)user;
if (!in_tls && use_tls)
if (xmpp_starttls(xmpp))
return -1;
return 0;
}
static void
dissect_xmpp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
xml_frame_t *xml_frame;
gboolean out_packet;
conversation_t *conversation;
xmpp_conv_info_t *xmpp_info;
proto_tree *xmpp_tree = NULL;
proto_item *xmpp_item = NULL;
xmpp_element_t *packet = NULL;
/*check if desegment
* now it checks that last char is '>',
* TODO checks that first element in packet is closed*/
int indx;
gchar last_char;
if (xmpp_desegment)
{
indx = tvb_reported_length(tvb) - 1;
if (indx >= 0)
{
last_char = tvb_get_guint8(tvb, indx);
while ((last_char <= ' ') && (indx - 1 >= 0))
{
indx--;
last_char = tvb_get_guint8(tvb, indx);
}
if ((indx >= 0) && (last_char != '>'))
{
pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT;
return;
}
}
}
col_set_str(pinfo->cinfo, COL_PROTOCOL, "XMPP");
col_clear(pinfo->cinfo, COL_INFO);
conversation = find_or_create_conversation(pinfo);
xmpp_info = (xmpp_conv_info_t *)conversation_get_proto_data(conversation, proto_xmpp);
if (xmpp_info && xmpp_info->ssl_proceed &&
xmpp_info->ssl_proceed < pinfo->fd->num)
{
call_dissector(ssl_handle, tvb, pinfo, tree);
return;
}
/*if tree == NULL then xmpp_item and xmpp_tree will also NULL*/
xmpp_item = proto_tree_add_item(tree, proto_xmpp, tvb, 0, -1, ENC_NA);
xmpp_tree = proto_item_add_subtree(xmpp_item, ett_xmpp);
call_dissector(xml_handle, tvb, pinfo, xmpp_tree);
/* If XML dissector is disabled, we can't do much */
if (!proto_is_protocol_enabled(find_protocol_by_id(dissector_handle_get_protocol_index(xml_handle))))
{
col_append_str(pinfo->cinfo, COL_INFO, "(XML dissector disabled, can't dissect XMPP)");
expert_add_info_format(pinfo, xmpp_item, PI_UNDECODED, PI_WARN, "XML dissector disabled, can't dissect XMPP");
return;
}
/*if stream end occurs then return*/
if(xmpp_stream_close(xmpp_tree,tvb, pinfo))
{
if(xmpp_tree)
xmpp_proto_tree_hide_first_child(xmpp_tree);
return;
}
if(!pinfo->private_data)
return;
/*data from XML dissector*/
xml_frame = ((xml_frame_t*)pinfo->private_data)->first_child;
if(!xml_frame)
return;
if (!xmpp_info) {
xmpp_info = se_new(xmpp_conv_info_t);
xmpp_info->req_resp = se_tree_create_non_persistent(EMEM_TREE_TYPE_RED_BLACK, "xmpp_req_resp");
xmpp_info->jingle_sessions = se_tree_create_non_persistent(EMEM_TREE_TYPE_RED_BLACK, "xmpp_jingle_sessions");
xmpp_info->ibb_sessions = se_tree_create_non_persistent(EMEM_TREE_TYPE_RED_BLACK, "xmpp_ibb_sessions");
xmpp_info->gtalk_sessions = se_tree_create_non_persistent(EMEM_TREE_TYPE_RED_BLACK, "xmpp_gtalk_sessions");
xmpp_info->ssl_start = 0;
xmpp_info->ssl_proceed = 0;
conversation_add_proto_data(conversation, proto_xmpp, (void *) xmpp_info);
}
if (pinfo->match_uint == pinfo->destport)
out_packet = TRUE;
else
out_packet = FALSE;
while(xml_frame)
{
packet = xmpp_xml_frame_to_element_t(xml_frame, NULL, tvb);
DISSECTOR_ASSERT(packet);
if (strcmp(packet->name, "iq") == 0) {
xmpp_iq_reqresp_track(pinfo, packet, xmpp_info);
xmpp_jingle_session_track(pinfo, packet, xmpp_info);
xmpp_gtalk_session_track(pinfo, packet, xmpp_info);
}
if (strcmp(packet->name, "iq") == 0 || strcmp(packet->name, "message") == 0) {
xmpp_ibb_session_track(pinfo, packet, xmpp_info);
}
if (tree) { /* we are being asked for details */
proto_item *outin_item;
if (out_packet)
outin_item = proto_tree_add_boolean(xmpp_tree, hf_xmpp_out, tvb, 0, 0, TRUE);
else
outin_item = proto_tree_add_boolean(xmpp_tree, hf_xmpp_in, tvb, 0, 0, TRUE);
PROTO_ITEM_SET_HIDDEN(outin_item);
/*it hides tree generated by XML dissector*/
xmpp_proto_tree_hide_first_child(xmpp_tree);
if (strcmp(packet->name, "iq") == 0) {
xmpp_iq(xmpp_tree, tvb, pinfo, packet);
} else if (strcmp(packet->name, "presence") == 0) {
xmpp_presence(xmpp_tree, tvb, pinfo, packet);
} else if (strcmp(packet->name, "message") == 0) {
xmpp_message(xmpp_tree, tvb, pinfo, packet);
} else if (strcmp(packet->name, "auth") == 0) {
xmpp_auth(xmpp_tree, tvb, pinfo, packet);
} else if (strcmp(packet->name, "challenge") == 0) {
xmpp_challenge_response_success(xmpp_tree, tvb, pinfo, packet, hf_xmpp_challenge, ett_xmpp_challenge, "CHALLENGE");
} else if (strcmp(packet->name, "response") == 0) {
xmpp_challenge_response_success(xmpp_tree, tvb, pinfo, packet, hf_xmpp_response, ett_xmpp_response, "RESPONSE");
} else if (strcmp(packet->name, "success") == 0) {
xmpp_challenge_response_success(xmpp_tree, tvb, pinfo, packet, hf_xmpp_success, ett_xmpp_success, "SUCCESS");
} else if (strcmp(packet->name, "failure") == 0) {
xmpp_failure(xmpp_tree, tvb, pinfo, packet);
} else if (strcmp(packet->name, "xml") == 0) {
xmpp_xml_header(xmpp_tree, tvb, pinfo, packet);
} else if (strcmp(packet->name, "stream") == 0) {
xmpp_stream(xmpp_tree, tvb, pinfo, packet);
} else if (strcmp(packet->name, "features") == 0) {
xmpp_features(xmpp_tree, tvb, pinfo, packet);
} else if (strcmp(packet->name, "starttls") == 0) {
xmpp_starttls(xmpp_tree, tvb, pinfo, packet, xmpp_info);
}else if (strcmp(packet->name, "proceed") == 0) {
xmpp_proceed(xmpp_tree, tvb, pinfo, packet, xmpp_info);
}else {
xmpp_proto_tree_show_first_child(xmpp_tree);
expert_add_info_format(pinfo, xmpp_tree, PI_UNDECODED, PI_NOTE, "Unknown packet: %s", packet->name);
col_clear(pinfo->cinfo, COL_INFO);
col_append_fstr(pinfo->cinfo, COL_INFO, "UNKNOWN PACKET ");
}
/*appends to COL_INFO information about src or dst*/
if (pinfo->match_uint == pinfo->destport) {
xmpp_attr_t *to = xmpp_get_attr(packet, "to");
if (to)
col_append_fstr(pinfo->cinfo, COL_INFO, "> %s ", to->value);
} else {
xmpp_attr_t *from = xmpp_get_attr(packet, "from");
if (from)
col_append_fstr(pinfo->cinfo, COL_INFO, "< %s ", from->value);
}
}
xmpp_element_t_tree_free(packet);
xml_frame = xml_frame->next_sibling;
}
}
