avb: more work

Implement generic MRP parsing.
Implement more MRP messages.
Implement MRP timeouts.
Implement MRP join/leave.
Prepare for generating and sending MRP packets.

src/modules/module-avbtp/mmrp.c

@@ -24,17 +24,116 @@
 
 #include <pipewire/pipewire.h>
 
+#include "utils.h"
 #include "mmrp.h"
 
 static const uint8_t mac[6] = AVB_MMRP_MAC;
 
+struct attr {
+	struct avbtp_mmrp_attribute attr;
+	struct spa_list link;
+	struct avbtp_mrp_attribute *a;
+	uint8_t addr[6];
+};
+
 struct mmrp {
 	struct server *server;
 	struct spa_hook server_listener;
+
+	struct spa_list attributes;
+};
+
+static struct attr *find_attr_by_addr(struct mmrp *mmrp, const uint8_t addr[6])
+{
+	struct attr *a;
+	spa_list_for_each(a, &mmrp->attributes, link)
+		if (memcmp(a->addr, addr, 6) == 0)
+			return a;
+	return NULL;
+}
+
+static bool mmrp_check_header(void *data, const void *hdr, size_t *hdr_size, bool *has_params)
+{
+	const struct avbtp_packet_mmrp_msg *msg = hdr;
+	uint8_t attr_type = msg->attribute_type;
+
+	if (!AVBTP_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;
+	pw_log_info("leave all");
+	spa_list_for_each(a, &mmrp->attributes, link)
+		if (a->attr.type == attribute_type)
+			avbtp_mrp_update_state(mmrp->server->mrp, now, a->a, event);
+	return 0;
+}
+
+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 avbtp_packet_mmrp_service_requirement *t = m;
+	char buf[128];
+	struct attr *a;
+
+	pw_log_info("service requirement");
+	pw_log_info(" %s", avbtp_utils_format_addr(buf, sizeof(buf), t->addr));
+
+	a = find_attr_by_addr(mmrp, t->addr);
+	if (a)
+		avbtp_mrp_rx_event(mmrp->server->mrp, now, a->a, event);
+	return 0;
+}
+
+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 avbtp_packet_mmrp_mac *t = m;
+	char buf[128];
+	struct attr *a;
+
+	pw_log_info("mac");
+	pw_log_info(" %s", avbtp_utils_format_addr(buf, sizeof(buf), t->addr));
+
+	a = find_attr_by_addr(mmrp, t->addr);
+	if (a)
+		avbtp_mrp_rx_event(mmrp->server->mrp, now, a->a, 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[] = {
+	[AVBTP_MMRP_ATTRIBUTE_TYPE_SERVICE_REQUIREMENT] = { process_service_requirement, },
+	[AVBTP_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 avbtp_mrp_parse_info info = {
+	AVBTP_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 avbtp_packet_mrp *p = message;
 
 	if (ntohs(p->eth.type) != AVB_MMRP_ETH)
@@ -43,8 +142,8 @@ static int mmrp_message(void *data, uint64_t now, const void *message, int len)
 		return 0;
 
 	pw_log_info("MMRP");
-
-	return 0;
+	return avbtp_mrp_parse_packet(mmrp->server->mrp,
+			now, message, len, &info, mmrp);
 }
 
 static void mmrp_destroy(void *data)
@@ -60,17 +159,53 @@ static const struct server_events server_events = {
 	.message = mmrp_message
 };
 
-int avbtp_mmrp_register(struct server *server)
+static int mmrp_attr_compare(void *data, struct avbtp_mrp_attribute *a, struct avbtp_mrp_attribute *b)
+{
+	return 0;
+}
+
+static int mmrp_attr_merge(void *data, struct avbtp_mrp_attribute *a, int vector)
+{
+	return 0;
+}
+
+static const struct avbtp_mrp_attribute_callbacks attr_cb = {
+	AVBTP_VERSION_MRP_ATTRIBUTE_CALLBACKS,
+	.compare = mmrp_attr_compare,
+	.merge = mmrp_attr_merge
+};
+
+struct avbtp_mmrp_attribute *avbtp_mmrp_attribute_new(struct avbtp_mmrp *m,
+		uint8_t type)
+{
+	struct mmrp *mmrp = (struct mmrp*)m;
+	struct avbtp_mrp_attribute *attr;
+	struct attr *a;
+
+	attr = avbtp_mrp_attribute_new(mmrp->server->mrp,
+		&attr_cb, mmrp, sizeof(struct attr));
+
+	a = attr->user_data;
+	a->a = attr;
+	a->attr.type = type;
+
+	spa_list_append(&mmrp->attributes, &a->link);
+
+	return &a->attr;
+}
+
+struct avbtp_mmrp *avbtp_mmrp_register(struct server *server)
 {
 	struct mmrp *mmrp;
 
 	mmrp = calloc(1, sizeof(*mmrp));
 	if (mmrp == NULL)
-		return -errno;
+		return NULL;
 
 	mmrp->server = server;
+	spa_list_init(&mmrp->attributes);
 
 	avdecc_server_add_listener(server, &mmrp->server_listener, &server_events, mmrp);
 
-	return 0;
+	return (struct avbtp_mmrp*)mmrp;
 }