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authorRobert Relyea <rrelyea@redhat.com>2010-11-28 16:36:38 +0200
committerAnthony Liguori <aliguori@us.ibm.com>2011-04-01 19:07:48 -0500
commit111a38b018c86e6651750c5a548ad534f80b5bb5 (patch)
treee9397c478ead6463da198dd141c61cfd7cba189e /libcacard/event.c
parentedbb21363fbfe40e050f583df921484cbc31c79d (diff)
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libcacard: initial commit
libcacard emulates a Common Access Card (CAC) which is a standard for smartcards. It is used by the emulated ccid card introduced in a following patch. Docs are available in docs/libcacard.txt Signed-off-by: Alon Levy <alevy@redhat.com> --- changes from v24->v25: * Fix out of tree builds. * Fix build with linux-user targets. changes from v23->v24: (Jes Sorensen review 2) * Makefile.target: use obj-$(CONFIG_*) += * remove unrequired includes, include qemu-common before qemu-thread * required adding #define NO_NSPR_10_SUPPORT (harmless) changes from v22->v23: * configure fixes: (reported by Stefan Hajnoczi) * test a = b, not a == b (second isn't portable) * quote $source_path in case it contains spaces - this doesn't really help since there are many other places that need similar fixes, not introduced by this patch. changes from v21->v22: * fix configure to not link libcacard if nss not found (reported by Stefan Hajnoczi) * fix vscclient linkage with simpletrace backend (reported by Stefan Hajnoczi) * card_7816.c: add missing break in ERROR_DATA_NOT_FOUND (reported by William van de Velde) changes from v20->v21: (Jes Sorensen review) * use qemu infrastructure: qemu-thread, qemu-common (qemu_malloc and qemu_free), error_report * assert instead of ASSERT * cosmetic fixes * use strpbrk and isspace * add --disable-nss --enable-nss here, instead of in the final patch. * split vscclient, passthru and docs to following patches. changes from v19->v20: * checkpatch.pl changes from v15->v16: Build: * don't erase self with distclean * fix make clean after make distclean * Makefile: make vscclient link quiet Behavioral: * vcard_emul_nss: load coolkey in more situations * vscclient: * use hton,ntoh * send init on connect, only start vevent thread on response * read payload after header check, before type switch * remove Reconnect * update for vscard_common changes, empty Flush implementation Style/Whitespace: * fix wrong variable usage * remove unused variable * use only C style comments * add copyright header * fix tabulation Signed-off-by: Alon Levy <alevy@redhat.com> libcacard: fix out of tree builds
Diffstat (limited to 'libcacard/event.c')
-rw-r--r--libcacard/event.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/libcacard/event.c b/libcacard/event.c
new file mode 100644
index 0000000..bb2f921
--- /dev/null
+++ b/libcacard/event.c
@@ -0,0 +1,106 @@
+/*
+ * event queue implementation.
+ *
+ * This code is licensed under the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ */
+
+#include "qemu-common.h"
+#include "qemu-thread.h"
+
+#include "vcard.h"
+#include "vreader.h"
+#include "vevent.h"
+
+VEvent *
+vevent_new(VEventType type, VReader *reader, VCard *card)
+{
+ VEvent *new_vevent;
+
+ new_vevent = (VEvent *)qemu_malloc(sizeof(VEvent));
+ new_vevent->next = NULL;
+ new_vevent->type = type;
+ new_vevent->reader = vreader_reference(reader);
+ new_vevent->card = vcard_reference(card);
+
+ return new_vevent;
+}
+
+void
+vevent_delete(VEvent *vevent)
+{
+ if (vevent == NULL) {
+ return;
+ }
+ vreader_free(vevent->reader);
+ vcard_free(vevent->card);
+ qemu_free(vevent);
+}
+
+/*
+ * VEvent queue management
+ */
+
+static VEvent *vevent_queue_head;
+static VEvent *vevent_queue_tail;
+static QemuMutex vevent_queue_lock;
+static QemuCond vevent_queue_condition;
+
+void vevent_queue_init(void)
+{
+ qemu_mutex_init(&vevent_queue_lock);
+ qemu_cond_init(&vevent_queue_condition);
+ vevent_queue_head = vevent_queue_tail = NULL;
+}
+
+void
+vevent_queue_vevent(VEvent *vevent)
+{
+ vevent->next = NULL;
+ qemu_mutex_lock(&vevent_queue_lock);
+ if (vevent_queue_head) {
+ assert(vevent_queue_tail);
+ vevent_queue_tail->next = vevent;
+ } else {
+ vevent_queue_head = vevent;
+ }
+ vevent_queue_tail = vevent;
+ qemu_cond_signal(&vevent_queue_condition);
+ qemu_mutex_unlock(&vevent_queue_lock);
+}
+
+/* must have lock */
+static VEvent *
+vevent_dequeue_vevent(void)
+{
+ VEvent *vevent = NULL;
+ if (vevent_queue_head) {
+ vevent = vevent_queue_head;
+ vevent_queue_head = vevent->next;
+ vevent->next = NULL;
+ }
+ return vevent;
+}
+
+VEvent *vevent_wait_next_vevent(void)
+{
+ VEvent *vevent;
+
+ qemu_mutex_lock(&vevent_queue_lock);
+ while ((vevent = vevent_dequeue_vevent()) == NULL) {
+ qemu_cond_wait(&vevent_queue_condition, &vevent_queue_lock);
+ }
+ qemu_mutex_unlock(&vevent_queue_lock);
+ return vevent;
+}
+
+VEvent *vevent_get_next_vevent(void)
+{
+ VEvent *vevent;
+
+ qemu_mutex_lock(&vevent_queue_lock);
+ vevent = vevent_dequeue_vevent();
+ qemu_mutex_unlock(&vevent_queue_lock);
+ return vevent;
+}
+