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protect the mcc_head with a mutex

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@12304 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2003-05-16 20:43:36 +00:00
parent 2b842fe389
commit 3064229aaf
1 changed files with 19 additions and 1 deletions
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20
lib/krb5/mcache.c
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@@ -46,6 +46,7 @@ typedef struct krb5_mcache {
struct krb5_mcache *next;
} krb5_mcache;
static HEIMDAL_MUTEX mcc_mutex = HEIMDAL_MUTEX_INITIALIZER;
static struct krb5_mcache *mcc_head;
#define MCACHE(X) ((krb5_mcache *)(X)->data.data)
@@ -64,7 +65,7 @@ mcc_get_name(krb5_context context,
static krb5_mcache *
mcc_alloc(const char *name)
{
krb5_mcache *m;
krb5_mcache *m, *m_c;
ALLOC(m, 1);
if(m == NULL)
@@ -77,11 +78,24 @@ mcc_alloc(const char *name)
free(m);
return NULL;
}
/* check for dups first */
HEIMDAL_MUTEX_lock(&mcc_mutex);
for (m_c = mcc_head; m_c != NULL; m_c = m_c->next)
if (strcmp(m->name, m_c->name) == 0)
break;
if (m_c) {
free(m->name);
free(m);
HEIMDAL_MUTEX_unlock(&mcc_mutex);
return NULL;
}
m->refcnt = 1;
m->primary_principal = NULL;
m->creds = NULL;
m->next = mcc_head;
mcc_head = m;
HEIMDAL_MUTEX_unlock(&mcc_mutex);
return m;
}
@@ -90,9 +104,11 @@ mcc_resolve(krb5_context context, krb5_ccache *id, const char *res)
{
krb5_mcache *m;
HEIMDAL_MUTEX_lock(&mcc_mutex);
for (m = mcc_head; m != NULL; m = m->next)
if (strcmp(m->name, res) == 0)
break;
HEIMDAL_MUTEX_unlock(&mcc_mutex);
if (m != NULL) {
m->refcnt++;
@@ -172,12 +188,14 @@ mcc_destroy(krb5_context context,
if (!MISDEAD(m)) {
/* if this is an active mcache, remove it from the linked
list, and free all data */
HEIMDAL_MUTEX_lock(&mcc_mutex);
for(n = &mcc_head; n && *n; n = &(*n)->next) {
if(m == *n) {
*n = m->next;
break;
}
}
HEIMDAL_MUTEX_unlock(&mcc_mutex);
krb5_free_principal (context, m->primary_principal);
m->primary_principal = NULL;