avb: avbtp -> avb

src/modules/module-avb/mmrp.c

@@ -0,0 +1,193 @@
+/* AVB support
+ *
+ * Copyright © 2022 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <pipewire/pipewire.h>
+
+#include "utils.h"
+#include "mmrp.h"
+
+static const uint8_t mac[6] = AVB_MMRP_MAC;
+
+struct attr {
+	struct avb_mmrp_attribute attr;
+	struct spa_list link;
+};
+
+struct mmrp {
+	struct server *server;
+	struct spa_hook server_listener;
+
+	struct spa_list attributes;
+};
+
+static bool mmrp_check_header(void *data, const void *hdr, size_t *hdr_size, bool *has_params)
+{
+	const struct avb_packet_mmrp_msg *msg = hdr;
+	uint8_t attr_type = msg->attribute_type;
+
+	if (!AVB_MMRP_ATTRIBUTE_TYPE_VALID(attr_type))
+		return false;
+
+	*hdr_size = sizeof(*msg);
+	*has_params = false;
+	return true;
+}
+
+static int mmrp_attr_event(void *data, uint64_t now, uint8_t attribute_type, uint8_t event)
+{
+	struct mmrp *mmrp = data;
+	struct attr *a;
+	spa_list_for_each(a, &mmrp->attributes, link)
+		if (a->attr.type == attribute_type)
+			avb_mrp_update_state(mmrp->server->mrp, now, a->attr.mrp, event);
+	return 0;
+}
+
+static void debug_service_requirement(const struct avb_packet_mmrp_service_requirement *t)
+{
+	char buf[128];
+	pw_log_info("service requirement");
+	pw_log_info(" %s", avb_utils_format_addr(buf, sizeof(buf), t->addr));
+}
+
+static int process_service_requirement(struct mmrp *mmrp, uint64_t now, uint8_t attr_type,
+		const void *m, uint8_t event, uint8_t param, int num)
+{
+	const struct avb_packet_mmrp_service_requirement *t = m;
+	struct attr *a;
+
+	debug_service_requirement(t);
+
+	spa_list_for_each(a, &mmrp->attributes, link)
+		if (a->attr.type == attr_type &&
+		    memcmp(a->attr.attr.service_requirement.addr, t->addr, 6) == 0)
+			avb_mrp_rx_event(mmrp->server->mrp, now, a->attr.mrp, event);
+	return 0;
+}
+
+static void debug_process_mac(const struct avb_packet_mmrp_mac *t)
+{
+	char buf[128];
+	pw_log_info("mac");
+	pw_log_info(" %s", avb_utils_format_addr(buf, sizeof(buf), t->addr));
+}
+
+static int process_mac(struct mmrp *mmrp, uint64_t now, uint8_t attr_type,
+		const void *m, uint8_t event, uint8_t param, int num)
+{
+	const struct avb_packet_mmrp_mac *t = m;
+	struct attr *a;
+
+	debug_process_mac(t);
+
+	spa_list_for_each(a, &mmrp->attributes, link)
+		if (a->attr.type == attr_type &&
+		    memcmp(a->attr.attr.mac.addr, t->addr, 6) == 0)
+			avb_mrp_rx_event(mmrp->server->mrp, now, a->attr.mrp, event);
+	return 0;
+}
+
+static const struct {
+	int (*dispatch) (struct mmrp *mmrp, uint64_t now, uint8_t attr_type,
+			const void *m, uint8_t event, uint8_t param, int num);
+} dispatch[] = {
+	[AVB_MMRP_ATTRIBUTE_TYPE_SERVICE_REQUIREMENT] = { process_service_requirement, },
+	[AVB_MMRP_ATTRIBUTE_TYPE_MAC] = { process_mac, },
+};
+
+static int mmrp_process(void *data, uint64_t now, uint8_t attribute_type, const void *value,
+			uint8_t event, uint8_t param, int index)
+{
+	struct mmrp *mmrp = data;
+	return dispatch[attribute_type].dispatch(mmrp, now,
+				attribute_type, value, event, param, index);
+}
+
+static const struct avb_mrp_parse_info info = {
+	AVB_VERSION_MRP_PARSE_INFO,
+	.check_header = mmrp_check_header,
+	.attr_event = mmrp_attr_event,
+	.process = mmrp_process,
+};
+
+static int mmrp_message(void *data, uint64_t now, const void *message, int len)
+{
+	struct mmrp *mmrp = data;
+	const struct avb_packet_mrp *p = message;
+
+	if (ntohs(p->eth.type) != AVB_MMRP_ETH)
+		return 0;
+	if (memcmp(p->eth.dest, mac, 6) != 0)
+		return 0;
+
+	pw_log_debug("MMRP");
+	return avb_mrp_parse_packet(mmrp->server->mrp,
+			now, message, len, &info, mmrp);
+}
+
+static void mmrp_destroy(void *data)
+{
+	struct mmrp *mmrp = data;
+	spa_hook_remove(&mmrp->server_listener);
+	free(mmrp);
+}
+
+static const struct server_events server_events = {
+	AVB_VERSION_SERVER_EVENTS,
+	.destroy = mmrp_destroy,
+	.message = mmrp_message
+};
+
+struct avb_mmrp_attribute *avb_mmrp_attribute_new(struct avb_mmrp *m,
+		uint8_t type)
+{
+	struct mmrp *mmrp = (struct mmrp*)m;
+	struct avb_mrp_attribute *attr;
+	struct attr *a;
+
+	attr = avb_mrp_attribute_new(mmrp->server->mrp, sizeof(struct attr));
+
+	a = attr->user_data;
+	a->attr.mrp = attr;
+	a->attr.type = type;
+	spa_list_append(&mmrp->attributes, &a->link);
+
+	return &a->attr;
+}
+
+struct avb_mmrp *avb_mmrp_register(struct server *server)
+{
+	struct mmrp *mmrp;
+
+	mmrp = calloc(1, sizeof(*mmrp));
+	if (mmrp == NULL)
+		return NULL;
+
+	mmrp->server = server;
+	spa_list_init(&mmrp->attributes);
+
+	avdecc_server_add_listener(server, &mmrp->server_listener, &server_events, mmrp);
+
+	return (struct avb_mmrp*)mmrp;
+}