Dear Sir
First opensession
slot-sessionIDCount=1
slot-index=2
sessionID=?(0x0202)
pk11queue_add(session,
sessionID=0x0202,slot-head,slot-sessHashSize=32);
{ int tmp = pk11_hash(id,hash_size); \
session-next = slot-head[2]; \
session-prev = NULL; \
if (slot-head[2]) slot-head[2]-prev = session; \
slot-head[2] = session; }
result:
sessionID=0x0202;
session-next=NULL;
session-prev=NULL;
slot-head[2]=session;
Second opensession
sessionID=?(0x0203)
pk11queue_add(session,
sessionID=0x0203,slot-head,slot-sessHashSize=32);
{ int tmp = pk11_hash(id,hash_size); \
session-next = slot-head[3]; \
session-prev = NULL; \
if (slot-head[3]) slot-head[3]-prev = session; \
slot-head[3] = session; }
result:
sessionID=0x0202;
session-next=NULL;
session-prev=NULL;
slot-head[3]=session;
my question:
1Does it seem to be working as intended in the examples my gave above?
2if yes. can you tell me what is the relation slot-head between
session?
3I read the sourcecode in fortpk11.c. The following figure describes
the realton .
look at the programm in the pkcs11.h
suppose:
First opensession
slot-sessionIDCount=1
slot-index=2
[sessionID = (PR_AtomicIncrement(slot-sessionIDCount) 0xff)
| (slot-index 24);]
sessionID=?(0x0202)
Second opensession
sessionID=?(0x0203)
/* NSC_OpenSession opens a session between an application and a token. */
CK_RV NSC_OpenSession(CK_SLOT_ID slotID, CK_FLAGS flags,
CK_VOID_PTR pApplication,CK_NOTIFY Notify,CK_SESSION_HANDLE_PTR
phSession)
{
PK11Slot *slot;
CK_SESSION_HANDLE sessionID;
PK11Session *session;
PK11Session *sameID;
slot = pk11_SlotFromID(slotID);
if (slot == NULL) return CKR_SLOT_ID_INVALID;
/* new session (we only have serial sessions) */
session = pk11_NewSession(slotID, Notify, pApplication,
flags | CKF_SERIAL_SESSION);
if (session == NULL) return CKR_HOST_MEMORY;
PK11_USE_THREADS(PZ_Lock(slot-slotLock);)
if (slot-readOnly (flags CKF_RW_SESSION)) {
/* NETSCAPE_SLOT_ID is Read ONLY */
session-info.flags = ~CKF_RW_SESSION;
}
slot-sessionCount++;
if (session-info.flags CKF_RW_SESSION) {
slot-rwSessionCount++;
}
PK11_USE_THREADS(PZ_Unlock(slot-slotLock);)
do {
do {
sessionID = (PR_AtomicIncrement(slot-sessionIDCount)
0xff)
| (slot-index 24);
} while (sessionID == CK_INVALID_HANDLE);
PK11_USE_THREADS(PZ_Lock(PK11_SESSION_LOCK(slot,sessionID));)
pk11queue_find(sameID, sessionID, slot-head, slot-sessHashSize);
if (sameID == NULL) {
session-handle = sessionID;
pk11_update_state(slot, session);
pk11queue_add(session, sessionID,
slot-head,slot-sessHashSize);
} else {
slot-sessionIDConflict++; /* for debugging */
}
PK11_USE_THREADS(PZ_Unlock(PK11_SESSION_LOCK(slot,sessionID));)
} while (sameID != NULL);
*phSession = sessionID;
return CKR_OK;
}
/* queueing helper macros */
#define pk11_hash(value,size) ((value) (size-1))/*size must be a power
of
2*/
#define pk11queue_add(element,id,head,hash_size) \
{ int tmp = pk11_hash(id,hash_size); \
(element)-next = (head)[tmp]; \
(element)-prev = NULL; \
if ((head)[tmp]) (head)[tmp]-prev = (element); \
(head)[tmp] = (element); }
#define pk11queue_find(element,id,head,hash_size) \
for( (element) = (head)[pk11_hash(id,hash_size)]; (element) != NULL; \
(element) = (element)-next) { \
if ((element)-handle == (id)) { break; } }
#define pk11queue_is_queued(element,id,head,hash_size) \
( ((element)-next) || ((element)-prev) || \
((head)[pk11_hash(id,hash_size)] == (element)) )
#define pk11queue_delete(element,id,head,hash_size) \
if ((element)-next) (element)-next-prev = (element)-prev; \
if ((element)-prev) (element)-prev-next = (element)-next; \
else (head)[pk11_hash(id,hash_size)] = ((element)-next); \
(element)-next = NULL; \
(element)-prev = NULL; \
begin 666 clip_image001.gif
M1TE.#EA*P)%`7`,2'^E-O9G1W87)E.B!-:6-R;W-O9G0@3V9F:6-E`'Y
M! $`+ $I`D4!@0```/___P$`P+_#(RGRL-GXQTVHJOSGS[
M#GYB2(YFB9YJRJYN[^R`=3VC?ZSO?^#PP*A\2B\8A,*I?,IO,)C4JGR@-
MBLUJM]RN]PL.B\?DLOF,3JO7[+8;:WW+Y_2Z_8[/Z_?\OO\/!@72%AH(B8
MJ+C(V.CX:#@(.4E9:7F)F:FYR=EY(^D9*CI*6FIZBIH::7:ZOH*RL[2YL)
M6HN;J[O+V^O[ZW,+/$Q;'R,G'PGK-SL_ P=+1W-/U]C9VMO5U9_60%'BX^
M3EYN?HZKKX_L/^#A\O/P\N2'^/GP^?'2#@_P\PH,!! L:/(@PH4(!K'3T
M6P@QHL2)%!G^5@QH\:-_PL;DO+F!/'D20YL0ALJ3*E1!/XDG),J9,@2Z?
