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OS IMV proposes IF-M segmentation contract

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The OS IMV sends a TCG IF-M Segmentation contract request.
All IETF standard attributes support segmentation. Additionally
the IETF Installed Packages standard attributes supports
incremental processing while segments are received.
This commit is contained in:
Andreas Steffen
2014-10-05 18:43:55 +02:00
parent fc47211740
commit a5dfe7a29a
6 changed files with 153 additions and 108 deletions
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src/libimcv/plugins/imc_os/imc_os.c
+8 -54
View File
@@ -30,7 +30,6 @@
#include <ita/ita_attr.h>
#include <ita/ita_attr_get_settings.h>
#include <ita/ita_attr_settings.h>
#include <ita/ita_attr_angel.h>
#include <ita/ita_attr_device_id.h>
#include <tncif_pa_subtypes.h>
@@ -341,69 +340,24 @@ static void add_device_id(imc_msg_t *msg)
*/
static void add_installed_packages(imc_state_t *state, imc_msg_t *msg)
{
pa_tnc_attr_t *attr = NULL, *attr_angel;
pa_tnc_attr_t *attr;
ietf_attr_installed_packages_t *attr_cast;
enumerator_t *enumerator;
chunk_t name, version;
size_t max_attr_size, attr_size, entry_size;
bool first = TRUE;
/**
* Compute the maximum IETF Installed Packages attribute size
* leaving space for an additional ITA Angel attribute
*/
max_attr_size = state->get_max_msg_len(state) -
PA_TNC_HEADER_SIZE - PA_TNC_ATTR_HEADER_SIZE;
/* At least one IETF Installed Packages attribute is sent */
attr = ietf_attr_installed_packages_create();
attr_size = PA_TNC_ATTR_HEADER_SIZE + IETF_INSTALLED_PACKAGES_MIN_SIZE;
enumerator = os->create_package_enumerator(os);
if (enumerator)
while (enumerator->enumerate(enumerator, &name, &version))
{
while (enumerator->enumerate(enumerator, &name, &version))
{
DBG2(DBG_IMC, "package '%.*s' (%.*s)",
name.len, name.ptr, version.len, version.ptr);
entry_size = 2 + name.len + version.len;
if (attr_size + entry_size > max_attr_size)
{
if (first)
{
/**
* Send an ITA Start Angel attribute to the IMV signalling
* that multiple ITA Installed Package attributes follow.
*/
attr_angel = ita_attr_angel_create(TRUE);
msg->add_attribute(msg, attr_angel);
first = FALSE;
}
msg->add_attribute(msg, attr);
/* create the next IETF Installed Packages attribute */
attr = ietf_attr_installed_packages_create();
attr_size = PA_TNC_ATTR_HEADER_SIZE +
IETF_INSTALLED_PACKAGES_MIN_SIZE;
}
attr_cast = (ietf_attr_installed_packages_t*)attr;
attr_cast->add(attr_cast, name, version);
attr_size += entry_size;
}
enumerator->destroy(enumerator);
DBG2(DBG_IMC, "package '%.*s' (%.*s)",
name.len, name.ptr, version.len, version.ptr);
attr_cast = (ietf_attr_installed_packages_t*)attr;
attr_cast->add(attr_cast, name, version);
}
enumerator->destroy(enumerator);
msg->add_attribute(msg, attr);
if (!first)
{
/**
* If we sent an ITA Start Angel attribute in the first place,
* terminate by appending a matching ITA Stop Angel attribute.
*/
attr_angel = ita_attr_angel_create(FALSE);
msg->add_attribute(msg, attr_angel);
}
}
/**