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Diffstat (limited to 'src/libimcv/imc/imc_msg.c')
-rw-r--r--src/libimcv/imc/imc_msg.c457
1 files changed, 457 insertions, 0 deletions
diff --git a/src/libimcv/imc/imc_msg.c b/src/libimcv/imc/imc_msg.c
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index 000000000..050e63f32
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+++ b/src/libimcv/imc/imc_msg.c
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+/*
+ * Copyright (C) 2012 Andreas Steffen
+ * HSR Hochschule fuer Technik Rapperswil
+ *
+ * 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. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * 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.
+ */
+
+#include "imc_msg.h"
+
+#include "ietf/ietf_attr.h"
+#include "ietf/ietf_attr_assess_result.h"
+#include "ietf/ietf_attr_remediation_instr.h"
+
+#include <tncif_names.h>
+
+#include <pen/pen.h>
+#include <collections/linked_list.h>
+#include <utils/debug.h>
+
+typedef struct private_imc_msg_t private_imc_msg_t;
+
+/**
+ * Private data of a imc_msg_t object.
+ *
+ */
+struct private_imc_msg_t {
+
+ /**
+ * Public imc_msg_t interface.
+ */
+ imc_msg_t public;
+
+ /**
+ * Connection ID
+ */
+ TNC_ConnectionID connection_id;
+
+ /**
+ * source ID
+ */
+ TNC_UInt32 src_id;
+
+ /**
+ * destination ID
+ */
+ TNC_UInt32 dst_id;
+
+ /**
+ * PA-TNC message type
+ */
+ pen_type_t msg_type;
+
+ /**
+ * List of PA-TNC attributes to be sent
+ */
+ linked_list_t *attr_list;
+
+ /**
+ * PA-TNC message
+ */
+ pa_tnc_msg_t *pa_msg;
+
+ /**
+ * Assigned IMC agent
+ */
+ imc_agent_t *agent;
+
+ /**
+ * Assigned IMC state
+ */
+ imc_state_t *state;
+};
+
+METHOD(imc_msg_t, get_src_id, TNC_UInt32,
+ private_imc_msg_t *this)
+{
+ return this->src_id;
+}
+
+METHOD(imc_msg_t, get_dst_id, TNC_UInt32,
+ private_imc_msg_t *this)
+{
+ return this->dst_id;
+}
+
+METHOD(imc_msg_t, send_, TNC_Result,
+ private_imc_msg_t *this, bool excl)
+{
+ pa_tnc_msg_t *pa_tnc_msg;
+ pa_tnc_attr_t *attr;
+ TNC_UInt32 msg_flags;
+ TNC_MessageType msg_type;
+ bool attr_added;
+ chunk_t msg;
+ enumerator_t *enumerator;
+ TNC_Result result = TNC_RESULT_SUCCESS;
+
+ while (this->attr_list->get_count(this->attr_list))
+ {
+ pa_tnc_msg = pa_tnc_msg_create(this->state->get_max_msg_len(this->state));
+ attr_added = FALSE;
+
+ enumerator = this->attr_list->create_enumerator(this->attr_list);
+ while (enumerator->enumerate(enumerator, &attr))
+ {
+ if (pa_tnc_msg->add_attribute(pa_tnc_msg, attr))
+ {
+ attr_added = TRUE;
+ }
+ else
+ {
+ if (attr_added)
+ {
+ break;
+ }
+ else
+ {
+ DBG1(DBG_IMC, "PA-TNC attribute too large to send, deleted");
+ attr->destroy(attr);
+ }
+ }
+ this->attr_list->remove_at(this->attr_list, enumerator);
+ }
+ enumerator->destroy(enumerator);
+
+ /* build and send the PA-TNC message via the IF-IMC interface */
+ if (!pa_tnc_msg->build(pa_tnc_msg))
+ {
+ pa_tnc_msg->destroy(pa_tnc_msg);
+ return TNC_RESULT_FATAL;
+ }
+ msg = pa_tnc_msg->get_encoding(pa_tnc_msg);
+ DBG3(DBG_IMC, "created PA-TNC message: %B", &msg);
+
+ if (this->state->has_long(this->state) && this->agent->send_message_long)
+ {
+ excl = excl && this->state->has_excl(this->state) &&
+ this->dst_id != TNC_IMVID_ANY;
+ msg_flags = excl ? TNC_MESSAGE_FLAGS_EXCLUSIVE : 0;
+ result = this->agent->send_message_long(this->src_id,
+ this->connection_id, msg_flags, msg.ptr, msg.len,
+ this->msg_type.vendor_id, this->msg_type.type,
+ this->dst_id);
+ }
+ else if (this->agent->send_message)
+ {
+ msg_type = (this->msg_type.vendor_id << 8) |
+ (this->msg_type.type & 0x000000ff);
+ result = this->agent->send_message(this->src_id, this->connection_id,
+ msg.ptr, msg.len, msg_type);
+ }
+
+ pa_tnc_msg->destroy(pa_tnc_msg);
+
+ if (result != TNC_RESULT_SUCCESS)
+ {
+ break;
+ }
+ }
+ return result;
+}
+
+/**
+ * Print a clearly visible assessment header to the log
+ */
+static void print_assessment_header(const char *name, TNC_UInt32 id, bool *first)
+{
+ if (*first)
+ {
+ DBG1(DBG_IMC, "***** assessment of IMC %u \"%s\" *****", id, name);
+ *first = FALSE;
+ }
+}
+
+/**
+ * Print a clearly visible assessment trailer to the log
+ */
+static void print_assessment_trailer(bool first)
+{
+ if (!first)
+ {
+ DBG1(DBG_IMC, "***** end of assessment *****");
+ }
+}
+
+METHOD(imc_msg_t, receive, TNC_Result,
+ private_imc_msg_t *this, bool *fatal_error)
+{
+ TNC_UInt32 target_imc_id;
+ enumerator_t *enumerator;
+ pa_tnc_attr_t *attr;
+ pen_type_t attr_type;
+ chunk_t msg;
+ bool first = TRUE;
+
+ if (this->state->has_long(this->state))
+ {
+ if (this->dst_id != TNC_IMCID_ANY)
+ {
+ DBG2(DBG_IMC, "IMC %u \"%s\" received message for Connection ID %u "
+ "from IMV %u to IMC %u",
+ this->agent->get_id(this->agent),
+ this->agent->get_name(this->agent),
+ this->connection_id, this->src_id, this->dst_id);
+ }
+ else
+ {
+ DBG2(DBG_IMC, "IMC %u \"%s\" received message for Connection ID %u "
+ "from IMV %u", this->agent->get_id(this->agent),
+ this->agent->get_name(this->agent),
+ this->connection_id, this->src_id);
+ }
+ }
+ else
+ {
+ DBG2(DBG_IMC, "IMC %u \"%s\" received message for Connection ID %u",
+ this->agent->get_id(this->agent),
+ this->agent->get_name(this->agent),
+ this->connection_id);
+ }
+ msg = this->pa_msg->get_encoding(this->pa_msg);
+ DBG3(DBG_IMC, "%B", &msg);
+
+ switch (this->pa_msg->process(this->pa_msg))
+ {
+ case SUCCESS:
+ break;
+ case VERIFY_ERROR:
+ {
+ imc_msg_t *error_msg;
+ TNC_Result result;
+
+ error_msg = imc_msg_create_as_reply(&this->public);
+
+ /* extract and copy by reference all error attributes */
+ enumerator = this->pa_msg->create_error_enumerator(this->pa_msg);
+ while (enumerator->enumerate(enumerator, &attr))
+ {
+ error_msg->add_attribute(error_msg, attr->get_ref(attr));
+ }
+ enumerator->destroy(enumerator);
+
+ /*
+ * send the PA-TNC message containing all error attributes
+ * with the excl flag set
+ */
+ result = error_msg->send(error_msg, TRUE);
+ error_msg->destroy(error_msg);
+ return result;
+ }
+ case FAILED:
+ default:
+ return TNC_RESULT_FATAL;
+ }
+
+ /* determine target IMC ID */
+ target_imc_id = (this->dst_id != TNC_IMCID_ANY) ?
+ this->dst_id : this->agent->get_id(this->agent);
+
+ /* preprocess any received IETF standard error attributes */
+ *fatal_error = this->pa_msg->process_ietf_std_errors(this->pa_msg);
+
+ /* preprocess any received IETF assessment result attribute */
+ enumerator = this->pa_msg->create_attribute_enumerator(this->pa_msg);
+ while (enumerator->enumerate(enumerator, &attr))
+ {
+ attr_type = attr->get_type(attr);
+
+ if (attr_type.vendor_id != PEN_IETF)
+ {
+ continue;
+ }
+ if (attr_type.type == IETF_ATTR_ASSESSMENT_RESULT)
+ {
+ ietf_attr_assess_result_t *attr_cast;
+ TNC_IMV_Evaluation_Result result;
+
+ attr_cast = (ietf_attr_assess_result_t*)attr;
+ result = attr_cast->get_result(attr_cast);
+ this->state->set_result(this->state, target_imc_id, result);
+
+ print_assessment_header(this->agent->get_name(this->agent),
+ target_imc_id, &first);
+ DBG1(DBG_IMC, "assessment result is '%N'",
+ TNC_IMV_Evaluation_Result_names, result);
+ }
+ else if (attr_type.type == IETF_ATTR_REMEDIATION_INSTRUCTIONS)
+ {
+ ietf_attr_remediation_instr_t *attr_cast;
+ pen_type_t parameters_type;
+ chunk_t parameters, string, lang_code;
+
+ attr_cast = (ietf_attr_remediation_instr_t*)attr;
+ parameters_type = attr_cast->get_parameters_type(attr_cast);
+ parameters = attr_cast->get_parameters(attr_cast);
+
+ print_assessment_header(this->agent->get_name(this->agent),
+ target_imc_id, &first);
+ if (parameters_type.vendor_id == PEN_IETF)
+ {
+ switch (parameters_type.type)
+ {
+ case IETF_REMEDIATION_PARAMETERS_URI:
+ DBG1(DBG_IMC, "remediation uri: %.*s",
+ parameters.len, parameters.ptr);
+ break;
+ case IETF_REMEDIATION_PARAMETERS_STRING:
+ string = attr_cast->get_string(attr_cast, &lang_code);
+ DBG1(DBG_IMC, "remediation string: [%.*s]\n%.*s",
+ lang_code.len, lang_code.ptr,
+ string.len, string.ptr);
+ break;
+ default:
+ DBG1(DBG_IMC, "remediation parameters: %B", &parameters);
+ }
+ }
+ else
+ {
+ DBG1(DBG_IMC, "remediation parameters: %B", &parameters);
+ }
+ }
+ }
+ enumerator->destroy(enumerator);
+
+ print_assessment_trailer(first);
+
+ return TNC_RESULT_SUCCESS;
+}
+
+METHOD(imc_msg_t, add_attribute, void,
+ private_imc_msg_t *this, pa_tnc_attr_t *attr)
+{
+ this->attr_list->insert_last(this->attr_list, attr);
+}
+
+METHOD(imc_msg_t, create_attribute_enumerator, enumerator_t*,
+ private_imc_msg_t *this)
+{
+ return this->pa_msg->create_attribute_enumerator(this->pa_msg);
+}
+
+METHOD(imc_msg_t, get_encoding, chunk_t,
+ private_imc_msg_t *this)
+{
+ if (this->pa_msg)
+ {
+ return this->pa_msg->get_encoding(this->pa_msg);
+ }
+ return chunk_empty;
+}
+
+METHOD(imc_msg_t, destroy, void,
+ private_imc_msg_t *this)
+{
+ this->attr_list->destroy_offset(this->attr_list,
+ offsetof(pa_tnc_attr_t, destroy));
+ DESTROY_IF(this->pa_msg);
+ free(this);
+}
+
+/**
+ * See header
+ */
+imc_msg_t *imc_msg_create(imc_agent_t *agent, imc_state_t *state,
+ TNC_ConnectionID connection_id,
+ TNC_UInt32 src_id, TNC_UInt32 dst_id,
+ pen_type_t msg_type)
+{
+ private_imc_msg_t *this;
+
+ INIT(this,
+ .public = {
+ .get_src_id = _get_src_id,
+ .get_dst_id = _get_dst_id,
+ .send = _send_,
+ .receive = _receive,
+ .add_attribute = _add_attribute,
+ .create_attribute_enumerator = _create_attribute_enumerator,
+ .get_encoding = _get_encoding,
+ .destroy = _destroy,
+ },
+ .connection_id = connection_id,
+ .src_id = src_id,
+ .dst_id = dst_id,
+ .msg_type = msg_type,
+ .attr_list = linked_list_create(),
+ .agent = agent,
+ .state = state,
+ );
+
+ return &this->public;
+}
+
+/**
+ * See header
+ */
+imc_msg_t* imc_msg_create_as_reply(imc_msg_t *msg)
+{
+ private_imc_msg_t *in;
+ TNC_UInt32 src_id;
+
+ in = (private_imc_msg_t*)msg;
+ src_id = (in->dst_id != TNC_IMCID_ANY) ?
+ in->dst_id : in->agent->get_id(in->agent);
+
+ return imc_msg_create(in->agent, in->state, in->connection_id, src_id,
+ in->src_id, in->msg_type);
+}
+
+/**
+ * See header
+ */
+imc_msg_t *imc_msg_create_from_data(imc_agent_t *agent, imc_state_t *state,
+ TNC_ConnectionID connection_id,
+ TNC_MessageType msg_type,
+ chunk_t msg)
+{
+ TNC_VendorID msg_vid;
+ TNC_MessageSubtype msg_subtype;
+
+ msg_vid = msg_type >> 8;
+ msg_subtype = msg_type & TNC_SUBTYPE_ANY;
+
+ return imc_msg_create_from_long_data(agent, state, connection_id,
+ TNC_IMVID_ANY, agent->get_id(agent),
+ msg_vid, msg_subtype, msg);
+}
+
+/**
+ * See header
+ */
+imc_msg_t *imc_msg_create_from_long_data(imc_agent_t *agent, imc_state_t *state,
+ TNC_ConnectionID connection_id,
+ TNC_UInt32 src_id,
+ TNC_UInt32 dst_id,
+ TNC_VendorID msg_vid,
+ TNC_MessageSubtype msg_subtype,
+ chunk_t msg)
+{
+ private_imc_msg_t *this;
+
+ this = (private_imc_msg_t*)imc_msg_create(agent, state,
+ connection_id, src_id, dst_id,
+ pen_type_create(msg_vid, msg_subtype));
+ this->pa_msg = pa_tnc_msg_create_from_data(msg);
+
+ return &this->public;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-20 13:25:34 +0000