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authorStefan Metzmacher <metze@samba.org>2010-03-19 14:59:19 +0100
committerStefan Metzmacher <metze@samba.org>2010-03-22 17:15:12 +0100
commit79e5e3dda7178c4d3c5952a48474d6dcafba91ec (patch)
tree57a1e1f4d67c4d1e96afb1d79527279fe1e20126
parent44d655b33fecb7a543ff957940716ba93fec12cd (diff)
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s3:smbd: setup a shared memory area for the signing state
metze
-rw-r--r--source3/smbd/signing.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/source3/smbd/signing.c b/source3/smbd/signing.c
index f8162d8778..83655624c0 100644
--- a/source3/smbd/signing.c
+++ b/source3/smbd/signing.c
@@ -87,6 +87,62 @@ void srv_cancel_sign_response(struct smbd_server_connection *conn)
smb_signing_cancel_reply(conn->smb1.signing_state, true);
}
+struct smbd_shm_signing {
+ size_t shm_size;
+ uint8_t *shm_ptr;
+
+ /* we know the signing engine will only allocate 2 chunks */
+ uint8_t *ptr1;
+ size_t len1;
+ uint8_t *ptr2;
+ size_t len2;
+};
+
+static void *smbd_shm_signing_alloc(TALLOC_CTX *mem_ctx, size_t len)
+{
+ struct smbd_shm_signing *s = talloc_get_type_abort(mem_ctx,
+ struct smbd_shm_signing);
+
+ if (s->ptr1 == NULL) {
+ s->len1 = len;
+ if (len % 8) {
+ s->len1 += (8 - (len % 8));
+ }
+ if (s->len1 > s->shm_size) {
+ s->len1 = 0;
+ errno = ENOMEM;
+ return NULL;
+ }
+ s->ptr1 = s->shm_ptr;
+ return s->ptr1;
+ }
+
+ if (s->ptr2 == NULL) {
+ s->len2 = len;
+ if (s->len2 > (s->shm_size - s->len1)) {
+ s->len2 = 0;
+ errno = ENOMEM;
+ return NULL;
+ }
+ s->ptr2 = s->shm_ptr + s->len1;
+ return s->ptr2;
+ }
+
+ errno = ENOMEM;
+ return NULL;
+}
+
+static void smbd_shm_signing_free(TALLOC_CTX *mem_ctx, void *ptr)
+{
+ struct smbd_shm_signing *s = talloc_get_type_abort(mem_ctx,
+ struct smbd_shm_signing);
+
+ if (s->ptr2 == ptr) {
+ s->ptr2 = NULL;
+ s->len2 = 0;
+ }
+}
+
/***********************************************************
Called by server negprot when signing has been negotiated.
************************************************************/
@@ -109,6 +165,30 @@ bool srv_init_signing(struct smbd_server_connection *conn)
break;
}
+ if (lp_async_smb_echo_handler()) {
+ struct smbd_shm_signing *s;
+
+ /* setup the signing state in shared memory */
+ s = talloc_zero(smbd_event_context(), struct smbd_shm_signing);
+ if (s == NULL) {
+ return false;
+ }
+ s->shm_size = 4096;
+ s->shm_ptr = (uint8_t *)allocate_anonymous_shared(s->shm_size);
+ if (s->shm_ptr == NULL) {
+ talloc_free(s);
+ return false;
+ }
+ conn->smb1.signing_state = smb_signing_init_ex(s,
+ allowed, mandatory,
+ smbd_shm_signing_alloc,
+ smbd_shm_signing_free);
+ if (!conn->smb1.signing_state) {
+ return false;
+ }
+ return true;
+ }
+
conn->smb1.signing_state = smb_signing_init(smbd_event_context(),
allowed, mandatory);
if (!conn->smb1.signing_state) {