lib: add wpipc library

Simple library that uses sockets for inter-process communication. It provides an
API to create server and client objects. Users can add custom handlers in the
server, and clients can send requests for those custom handlers.

Signed-off-by: George Kiagiadakis <george.kiagiadakis@collabora.com>

1 files changed, 84 insertions, 0 deletions

diff --git a/lib/client.c b/lib/client.c
new file mode 100644
index 0000000..735796f
--- /dev/null
+++ b/lib/client.c
@@ -0,0 +1,84 @@
+/* PipeWire AGL Cluster IPC
+ *
+ * Copyright © 2021 Collabora Ltd.
+ *    @author Julian Bouzas <julian.bouzas@collabora.com>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "private.h"
+#include "protocol.h"
+#include "sender.h"
+#include "client.h"
+
+#define BUFFER_SIZE 1024
+
+static void
+on_lost_connection (struct icipc_sender *self,
+                               int receiver_fd,
+                               void *data)
+{
+  icipc_log_warn ("client: lost connection with server %d", receiver_fd);
+}
+
+/* API */
+
+struct icipc_client *
+icipc_client_new (const char *path, bool connect)
+{
+  struct icipc_sender *base;
+  base = icipc_sender_new (path, BUFFER_SIZE, on_lost_connection, NULL, 0);
+
+  if (connect)
+    icipc_sender_connect (base);
+
+  return (struct icipc_client *)base;
+}
+
+void
+icipc_client_free (struct icipc_client *self)
+{
+  struct icipc_sender *base = icipc_client_to_sender (self);
+  icipc_sender_free (base);
+}
+
+bool
+icipc_client_send_request (struct icipc_client *self,
+                           const char *name,
+                           const struct spa_pod *args,
+                           icipc_sender_reply_func_t reply,
+                           void *data)
+{
+  struct icipc_sender *base = icipc_client_to_sender (self);
+
+  /* check params */
+  if (name == NULL)
+    return false;
+
+  const size_t size = icipc_protocol_calculate_request_size (name, args);
+  uint8_t buffer[size];
+  icipc_protocol_build_request (buffer, size, name, args);
+  return icipc_sender_send (base, buffer, size, reply, data);
+}
+
+const struct spa_pod *
+icipc_client_send_request_finish (struct icipc_sender *self,
+                                  const uint8_t *buffer,
+                                  size_t size,
+                                  const char **error)
+{
+  /* error */
+  if (icipc_protocol_is_reply_error (buffer, size)) {
+    icipc_protocol_parse_reply_error (buffer, size, error);
+    return NULL;
+  }
+
+  /* ok */
+  if (icipc_protocol_is_reply_ok (buffer, size)) {
+    const struct spa_pod *value = NULL;
+    if (icipc_protocol_parse_reply_ok (buffer, size, &value))
+      return value;
+  }
+
+  return NULL;
+}