int ipsec_sadb_init(void)
{
int error = 0;
unsigned i;
for (i = 0; i < SADB_HASHMOD; i++)
ipsec_sadb_hash[i] = NULL;
/* parts above are for the old style SADB hash table */
/* initialise SA reference table */
/* initialise the main table */
KLIPS_PRINT(debug_xform,
"klips_debug:ipsec_sadb_init: "
"initialising main table of size %u (2 ^ %u).\n",
IPSEC_SA_REF_MAINTABLE_NUM_ENTRIES,
IPSEC_SA_REF_MAINTABLE_IDX_WIDTH);
{
unsigned table;
for (table = 0; table < IPSEC_SA_REF_MAINTABLE_NUM_ENTRIES;
table++)
ipsec_sadb.refTable[table] = NULL;
}
/* allocate the first sub-table */
error = ipsec_SArefSubTable_alloc(0);
if (error)
return error;
error = ipsec_saref_freelist_init();
return error;
}
static int ipsec_saref_verify_slot(IPsecSAref_t ref)
{
int ref_table = IPsecSAref2table(ref);
if (ipsec_sadb.refTable[ref_table] == NULL)
return ipsec_SArefSubTable_alloc(ref_table);
return 0;
}
static int ipsec_SAref_recycle(void)
{
int table, i;
int error = 0;
int entry;
int addone;
ipsec_sadb.refFreeListHead = IPSEC_SAREF_NULL;
ipsec_sadb.refFreeListTail = IPSEC_SAREF_NULL;
KLIPS_PRINT(debug_xform,
"klips_debug:ipsec_SAref_recycle: "
"recycling, continuing from SAref=%d (0p%p), table=%d, entry=%d.\n",
ipsec_sadb.refFreeListCont,
(ipsec_sadb.refTable[IPsecSAref2table(ipsec_sadb.
refFreeListCont)] != NULL) ?
IPsecSAref2SA(ipsec_sadb.refFreeListCont) : NULL,
IPsecSAref2table(ipsec_sadb.refFreeListCont),
IPsecSAref2entry(ipsec_sadb.refFreeListCont));
/* add one additional table entry */
addone = 0;
for (i = 0; i < IPSEC_SA_REF_MAINTABLE_NUM_ENTRIES; i++) {
if (ipsec_sadb.refFreeListCont ==
IPSEC_SA_REF_MAINTABLE_NUM_ENTRIES *
IPSEC_SA_REF_SUBTABLE_NUM_ENTRIES) {
KLIPS_PRINT(debug_xform,
"klips_debug:ipsec_SAref_recycle: "
"end of table reached, continuing at start..\n");
ipsec_sadb.refFreeListCont = IPSEC_SAREF_FIRST;
}
table = IPsecSAref2table(ipsec_sadb.refFreeListCont);
if (ipsec_sadb.refTable[table] == NULL) {
if (addone == 0) {
addone = 1;
error = ipsec_SArefSubTable_alloc(table);
if (error)
return error;
else
break;
}
}
for (entry = IPsecSAref2entry(ipsec_sadb.refFreeListCont);
entry < IPSEC_SA_REF_SUBTABLE_NUM_ENTRIES;
entry++) {
if (ipsec_sadb.refTable[table]->entry[entry] == NULL) {
ipsec_sadb.refFreeList[++ipsec_sadb.
refFreeListTail] =
IPsecSArefBuild(table, entry);
if (ipsec_sadb.refFreeListTail ==
(IPSEC_SA_REF_FREELIST_NUM_ENTRIES - 1)) {
ipsec_sadb.refFreeListHead =
IPSEC_SAREF_FIRST;
ipsec_sadb.refFreeListCont =
ipsec_sadb.refFreeList[
ipsec_sadb.
refFreeListTail
] + 1;
KLIPS_PRINT(debug_xform,
"klips_debug:ipsec_SAref_recycle: "
"SArefFreeList refilled.\n");
return 0;
}
}
ipsec_sadb.refFreeListCont++;
}
}
if (ipsec_sadb.refFreeListTail == IPSEC_SAREF_NULL) {
KLIPS_PRINT(debug_xform,
"klips_debug:ipsec_SAref_recycle: "
"out of room in the SArefTable.\n");
return -ENOSPC;
}
ipsec_sadb.refFreeListHead = IPSEC_SAREF_FIRST;
ipsec_sadb.refFreeListCont =
ipsec_sadb.refFreeList[ipsec_sadb.refFreeListTail] + 1;
KLIPS_PRINT(debug_xform,
"klips_debug:ipsec_SAref_recycle: "
"SArefFreeList partly refilled to %d of %d.\n",
ipsec_sadb.refFreeListTail,
IPSEC_SA_REF_FREELIST_NUM_ENTRIES);
return 0;
}
int
ipsec_SAref_recycle(void)
{
int table, i;
int error = 0;
int addone;
ipsec_sadb.refFreeListHead = IPSEC_SAREF_NULL;
ipsec_sadb.refFreeListTail = IPSEC_SAREF_NULL;
if(ipsec_sadb.refFreeListCont == IPSEC_SA_REF_MAINTABLE_NUM_ENTRIES * IPSEC_SA_REF_SUBTABLE_NUM_ENTRIES) {
KLIPS_PRINT(debug_xform,
"klips_debug:ipsec_SAref_recycle: "
"end of table reached, continuing at start..\n");
ipsec_sadb.refFreeListCont = IPSEC_SAREF_FIRST;
}
KLIPS_PRINT(debug_xform,
"klips_debug:ipsec_SAref_recycle: "
"recycling, continuing from SAref=%d (0p%p), table=%d, entry=%d.\n",
ipsec_sadb.refFreeListCont,
(ipsec_sadb.refTable[IPsecSAref2table(ipsec_sadb.refFreeListCont)] != NULL) ? IPsecSAref2SA(ipsec_sadb.refFreeListCont) : NULL,
IPsecSAref2table(ipsec_sadb.refFreeListCont),
IPsecSAref2entry(ipsec_sadb.refFreeListCont));
/* add one additional table entry */
addone = 0;
ipsec_sadb.refFreeListHead = IPSEC_SAREF_FIRST;
for(i = 0; i < IPSEC_SA_REF_FREELIST_NUM_ENTRIES; i++) {
table = IPsecSAref2table(ipsec_sadb.refFreeListCont);
if(addone == 0 && ipsec_sadb.refTable[table] == NULL) {
addone = 1;
error = ipsec_SArefSubTable_alloc(table);
if(error) {
return error;
}
}
if(ipsec_sadb.refTable[table] == NULL) {
/* we failed to add a second table, so just stop */
break;
}
if(IPsecSAref2SA(ipsec_sadb.refFreeListCont) == NULL) {
ipsec_sadb.refFreeList[i] = ipsec_sadb.refFreeListCont;
}
ipsec_sadb.refFreeListCont++;
ipsec_sadb.refFreeListTail=i;
}
if(ipsec_sadb.refFreeListTail == IPSEC_SAREF_NULL) {
KLIPS_PRINT(debug_xform,
"klips_debug:ipsec_SAref_recycle: "
"out of room in the SArefTable.\n");
return(-ENOSPC);
}
KLIPS_PRINT(debug_xform,
"klips_debug:ipsec_SAref_recycle: "
"SArefFreeList partly refilled to %d of %d.\n",
ipsec_sadb.refFreeListTail,
IPSEC_SA_REF_FREELIST_NUM_ENTRIES);
return 0;
}
