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refactored PA-TNC message handling by IMVs

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This commit is contained in:
Andreas Steffen
2012-10-17 23:15:14 +02:00
parent f8a70254a9
commit 6a61b79583
14 changed files with 1000 additions and 625 deletions
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src/libimcv/plugins/imv_scanner/imv_scanner.c
+64 -49
View File
@@ -16,6 +16,7 @@
#include "imv_scanner_state.h"
#include <imv/imv_agent.h>
#include <imv/imv_msg.h>
#include <pa_tnc/pa_tnc_msg.h>
#include <ietf/ietf_attr.h>
#include <ietf/ietf_attr_pa_tnc_error.h>
@@ -176,50 +177,24 @@ TNC_Result TNC_IMV_NotifyConnectionChange(TNC_IMVID imv_id,
}
}
static TNC_Result receive_message(TNC_IMVID imv_id,
TNC_ConnectionID connection_id,
TNC_UInt32 msg_flags,
chunk_t msg,
TNC_VendorID msg_vid,
TNC_MessageSubtype msg_subtype,
TNC_UInt32 src_imc_id,
TNC_UInt32 dst_imv_id)
static TNC_Result receive_message(imv_state_t *state, imv_msg_t *in_msg)
{
pa_tnc_msg_t *pa_tnc_msg;
imv_msg_t *out_msg;
enumerator_t *enumerator;
pa_tnc_attr_t *attr;
pen_type_t type;
imv_state_t *state;
enumerator_t *enumerator;
TNC_Result result;
bool fatal_error;
bool fatal_error = FALSE;
if (!imv_scanner)
{
DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
return TNC_RESULT_NOT_INITIALIZED;
}
/* get current IMV state */
if (!imv_scanner->get_state(imv_scanner, connection_id, &state))
{
return TNC_RESULT_FATAL;
}
/* parse received PA-TNC message and automatically handle any errors */
result = imv_scanner->receive_message(imv_scanner, state, msg, msg_vid,
msg_subtype, src_imc_id, dst_imv_id, &pa_tnc_msg);
/* no parsed PA-TNC attributes available if an error occurred */
if (!pa_tnc_msg)
/* parse received PA-TNC message and handle local and remote errors */
result = in_msg->receive(in_msg, &fatal_error);
if (result != TNC_RESULT_SUCCESS)
{
return result;
}
/* preprocess any IETF standard error attributes */
fatal_error = pa_tnc_msg->process_ietf_std_errors(pa_tnc_msg);
/* analyze PA-TNC attributes */
enumerator = pa_tnc_msg->create_attribute_enumerator(pa_tnc_msg);
enumerator = in_msg->create_attribute_enumerator(in_msg);
while (enumerator->enumerate(enumerator, &attr))
{
type = attr->get_type(attr);
@@ -301,16 +276,22 @@ static TNC_Result receive_message(TNC_IMVID imv_id,
}
}
enumerator->destroy(enumerator);
pa_tnc_msg->destroy(pa_tnc_msg);
if (fatal_error)
{
state->set_recommendation(state,
TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
TNC_IMV_EVALUATION_RESULT_ERROR);
TNC_IMV_EVALUATION_RESULT_ERROR);
}
return imv_scanner->provide_recommendation(imv_scanner, connection_id,
src_imc_id, PEN_ITA, PA_SUBTYPE_ITA_SCANNER);
out_msg = imv_msg_create_as_reply(in_msg);
result = out_msg->send_assessment(out_msg);
out_msg->destroy(out_msg);
if (result != TNC_RESULT_SUCCESS)
{
return result;
}
return imv_scanner->provide_recommendation(imv_scanner, state);
}
/**
@@ -322,14 +303,26 @@ TNC_Result TNC_IMV_ReceiveMessage(TNC_IMVID imv_id,
TNC_UInt32 msg_len,
TNC_MessageType msg_type)
{
TNC_VendorID msg_vid;
TNC_MessageSubtype msg_subtype;
imv_state_t *state;
imv_msg_t *in_msg;
TNC_Result result;
msg_vid = msg_type >> 8;
msg_subtype = msg_type & TNC_SUBTYPE_ANY;
if (!imv_scanner)
{
DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
return TNC_RESULT_NOT_INITIALIZED;
}
if (!imv_scanner->get_state(imv_scanner, connection_id, &state))
{
return TNC_RESULT_FATAL;
}
return receive_message(imv_id, connection_id, 0, chunk_create(msg, msg_len),
msg_vid, msg_subtype, 0, TNC_IMVID_ANY);
in_msg = imv_msg_create_from_data(imv_scanner, state, connection_id, msg_type,
chunk_create(msg, msg_len));
result = receive_message(state, in_msg);
in_msg->destroy(in_msg);
return result;
}
/**
@@ -345,9 +338,26 @@ TNC_Result TNC_IMV_ReceiveMessageLong(TNC_IMVID imv_id,
TNC_UInt32 src_imc_id,
TNC_UInt32 dst_imv_id)
{
return receive_message(imv_id, connection_id, msg_flags,
chunk_create(msg, msg_len), msg_vid, msg_subtype,
src_imc_id, dst_imv_id);
imv_state_t *state;
imv_msg_t *in_msg;
TNC_Result result;
if (!imv_scanner)
{
DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
return TNC_RESULT_NOT_INITIALIZED;
}
if (!imv_scanner->get_state(imv_scanner, connection_id, &state))
{
return TNC_RESULT_FATAL;
}
in_msg = imv_msg_create_from_long_data(imv_scanner, state, connection_id,
src_imc_id, dst_imv_id, msg_vid, msg_subtype,
chunk_create(msg, msg_len));
result =receive_message(state, in_msg);
in_msg->destroy(in_msg);
return result;
}
/**
@@ -356,13 +366,18 @@ TNC_Result TNC_IMV_ReceiveMessageLong(TNC_IMVID imv_id,
TNC_Result TNC_IMV_SolicitRecommendation(TNC_IMVID imv_id,
TNC_ConnectionID connection_id)
{
imv_state_t *state;
if (!imv_scanner)
{
DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
return TNC_RESULT_NOT_INITIALIZED;
}
return imv_scanner->provide_recommendation(imv_scanner, connection_id,
TNC_IMCID_ANY, PEN_ITA, PA_SUBTYPE_ITA_SCANNER);
if (!imv_scanner->get_state(imv_scanner, connection_id, &state))
{
return TNC_RESULT_FATAL;
}
return imv_scanner->provide_recommendation(imv_scanner, state);
}
/**