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implement a preferred language enumerator

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This commit is contained in:
Andreas Steffen
2012-11-10 21:35:46 +01:00
parent 4ccc4fd97c
commit db15c6dac1
7 changed files with 226 additions and 164 deletions
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src/libimcv/imv/imv_agent.c
+143 -45
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@@ -474,50 +474,6 @@ METHOD(imv_agent_t, get_state, bool,
return TRUE;
}
METHOD(imv_agent_t, provide_recommendation, TNC_Result,
private_imv_agent_t *this, imv_state_t *state)
{
TNC_IMV_Action_Recommendation rec;
TNC_IMV_Evaluation_Result eval;
TNC_ConnectionID connection_id;
TNC_UInt32 lang_len;
char buf[BUF_LEN];
chunk_t pref_lang = { buf, 0 }, reason_string, reason_lang;
state->get_recommendation(state, &rec, &eval);
connection_id = state->get_connection_id(state);
/* send a reason string if action recommendation is not allow */
if (rec != TNC_IMV_ACTION_RECOMMENDATION_ALLOW)
{
/* check if there a preferred language has been requested */
if (this->get_attribute &&
this->get_attribute(this->id, connection_id,
TNC_ATTRIBUTEID_PREFERRED_LANGUAGE, BUF_LEN,
buf, &lang_len) == TNC_RESULT_SUCCESS &&
lang_len <= BUF_LEN)
{
pref_lang.len = lang_len;
DBG2(DBG_IMV, "preferred language is '%.*s'", (int)pref_lang.len,
pref_lang.ptr);
}
/* find a reason string for the preferred or default language and set it */
if (this->set_attribute &&
state->get_reason_string(state, pref_lang, &reason_string,
&reason_lang))
{
this->set_attribute(this->id, connection_id,
TNC_ATTRIBUTEID_REASON_STRING,
reason_string.len, reason_string.ptr);
this->set_attribute(this->id, connection_id,
TNC_ATTRIBUTEID_REASON_LANGUAGE,
reason_lang.len, reason_lang.ptr);
}
}
return this->provide_recommendation(this->id, connection_id, rec, eval);
}
METHOD(imv_agent_t, get_name, const char*,
private_imv_agent_t *this)
{
@@ -575,6 +531,147 @@ METHOD(imv_agent_t, create_id_enumerator, enumerator_t*,
return this->additional_ids->create_enumerator(this->additional_ids);
}
typedef struct {
/**
* implements enumerator_t
*/
enumerator_t public;
/**
* language length
*/
TNC_UInt32 lang_len;
/**
* language buffer
*/
char lang_buf[BUF_LEN];
/**
* position pointer into language buffer
*/
char *lang_pos;
} language_enumerator_t;
/**
* Implementation of language_enumerator.destroy.
*/
static void language_enumerator_destroy(language_enumerator_t *this)
{
free(this);
}
/**
* Implementation of language_enumerator.enumerate
*/
static bool language_enumerator_enumerate(language_enumerator_t *this, ...)
{
char *pos, *cur_lang, **lang;
TNC_UInt32 len;
va_list args;
if (!this->lang_len)
{
return FALSE;
}
cur_lang = this->lang_pos;
pos = strchr(this->lang_pos, ',');
if (pos)
{
len = pos - this->lang_pos;
this->lang_pos += len + 1,
this->lang_len -= len + 1;
}
else
{
pos = this->lang_pos + len;
len = this->lang_len;
this->lang_pos = NULL;
this->lang_len = 0;
}
/* remove preceding whitespace */
while (*cur_lang == ' ' && len--)
{
cur_lang++;
}
/* remove trailing whitespace */
while (len && *(--pos) == ' ')
{
len--;
}
cur_lang[len] = '\0';
DBG1(DBG_IMV, "current language = '%s'", cur_lang);
va_start(args, this);
lang = va_arg(args, char**);
*lang = cur_lang;
va_end(args);
return TRUE;
}
METHOD(imv_agent_t, create_language_enumerator, enumerator_t*,
private_imv_agent_t *this, imv_state_t *state)
{
language_enumerator_t *e;
/* Create a language enumerator instance */
e = malloc_thing(language_enumerator_t);
if (!this->get_attribute ||
!this->get_attribute(this->id, state->get_connection_id(state),
TNC_ATTRIBUTEID_PREFERRED_LANGUAGE, BUF_LEN,
e->lang_buf, &e->lang_len) == TNC_RESULT_SUCCESS ||
e->lang_len >= BUF_LEN)
{
free(e);
return NULL;
}
e->public.enumerate = (void*)language_enumerator_enumerate;
e->public.destroy = (void*)language_enumerator_destroy;
e->lang_buf[e->lang_len] = '\0';
e->lang_pos = e->lang_buf;
return (enumerator_t*)e;
}
METHOD(imv_agent_t, provide_recommendation, TNC_Result,
private_imv_agent_t *this, imv_state_t *state)
{
TNC_IMV_Action_Recommendation rec;
TNC_IMV_Evaluation_Result eval;
TNC_ConnectionID connection_id;
char *reason_string, *reason_lang;
enumerator_t *e;
state->get_recommendation(state, &rec, &eval);
connection_id = state->get_connection_id(state);
/* send a reason string if action recommendation is not allow */
if (rec != TNC_IMV_ACTION_RECOMMENDATION_ALLOW)
{
/* find a reason string for the preferred language and set it */
if (this->set_attribute)
{
e = create_language_enumerator(this, state);
if (state->get_reason_string(state, e, &reason_string, &reason_lang))
{
this->set_attribute(this->id, connection_id,
TNC_ATTRIBUTEID_REASON_STRING,
strlen(reason_string), reason_string);
this->set_attribute(this->id, connection_id,
TNC_ATTRIBUTEID_REASON_LANGUAGE,
strlen(reason_lang), reason_lang);
}
e->destroy(e);
}
}
return this->provide_recommendation(this->id, connection_id, rec, eval);
}
METHOD(imv_agent_t, destroy, void,
private_imv_agent_t *this)
{
@@ -611,12 +708,13 @@ imv_agent_t *imv_agent_create(const char *name,
.delete_state = _delete_state,
.change_state = _change_state,
.get_state = _get_state,
.provide_recommendation = _provide_recommendation,
.get_name = _get_name,
.get_id = _get_id,
.reserve_additional_ids = _reserve_additional_ids,
.count_additional_ids = _count_additional_ids,
.create_id_enumerator = _create_id_enumerator,
.create_language_enumerator = _create_language_enumerator,
.provide_recommendation = _provide_recommendation,
.destroy = _destroy,
},
.name = name,