1 files changed, 297 insertions, 0 deletions
diff --git a/src/modules/module-avb/mvrp.c b/src/modules/module-avb/mvrp.c
new file mode 100644
index 0000000..2f5f6ea
--- /dev/null
+++ b/src/modules/module-avb/mvrp.c
@@ -0,0 +1,297 @@
+/* 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 <unistd.h>
+
+#include <pipewire/pipewire.h>
+
+#include "mvrp.h"
+
+static const uint8_t mvrp_mac[6] = AVB_MVRP_MAC;
+
+struct attr {
+	struct avb_mvrp_attribute attr;
+	struct spa_hook listener;
+	struct spa_list link;
+	struct mvrp *mvrp;
+};
+
+struct mvrp {
+	struct server *server;
+	struct spa_hook server_listener;
+	struct spa_hook mrp_listener;
+
+	struct spa_source *source;
+
+	struct spa_list attributes;
+};
+
+static bool mvrp_check_header(void *data, const void *hdr, size_t *hdr_size, bool *has_params)
+{
+	const struct avb_packet_mvrp_msg *msg = hdr;
+	uint8_t attr_type = msg->attribute_type;
+
+	if (!AVB_MVRP_ATTRIBUTE_TYPE_VALID(attr_type))
+		return false;
+
+	*hdr_size = sizeof(*msg);
+	*has_params = false;
+	return true;
+}
+
+static int mvrp_attr_event(void *data, uint64_t now, uint8_t attribute_type, uint8_t event)
+{
+	struct mvrp *mvrp = data;
+	struct attr *a;
+	spa_list_for_each(a, &mvrp->attributes, link)
+		if (a->attr.type == attribute_type)
+			avb_mrp_attribute_rx_event(a->attr.mrp, now, event);
+	return 0;
+}
+
+static void debug_vid(const struct avb_packet_mvrp_vid *t)
+{
+	pw_log_info("vid");
+	pw_log_info(" %d", ntohs(t->vlan));
+}
+
+static int process_vid(struct mvrp *mvrp, uint64_t now, uint8_t attr_type,
+		const void *m, uint8_t event, uint8_t param, int num)
+{
+	return mvrp_attr_event(mvrp, now, attr_type, event);
+}
+
+static int encode_vid(struct mvrp *mvrp, struct attr *a, void *m)
+{
+	struct avb_packet_mvrp_msg *msg = m;
+	struct avb_packet_mrp_vector *v;
+	struct avb_packet_mvrp_vid *d;
+	struct avb_packet_mrp_footer *f;
+	uint8_t *ev;
+	size_t attr_list_length = sizeof(*v) + sizeof(*d) + sizeof(*f) + 1;
+
+	msg->attribute_type = AVB_MVRP_ATTRIBUTE_TYPE_VID;
+	msg->attribute_length = sizeof(*d);
+
+	v = (struct avb_packet_mrp_vector *)msg->attribute_list;
+	v->lva = 0;
+	AVB_MRP_VECTOR_SET_NUM_VALUES(v, 1);
+
+	d = (struct avb_packet_mvrp_vid *)v->first_value;
+	*d = a->attr.attr.vid;
+
+	ev = SPA_PTROFF(d, sizeof(*d), uint8_t);
+	*ev = a->attr.mrp->pending_send * 36;
+
+	f = SPA_PTROFF(ev, sizeof(*ev), struct avb_packet_mrp_footer);
+	f->end_mark = 0;
+
+	return attr_list_length + sizeof(*msg);
+}
+
+static void notify_vid(struct mvrp *mvrp, uint64_t now, struct attr *attr, uint8_t notify)
+{
+	pw_log_info("> notify vid: %s", avb_mrp_notify_name(notify));
+	debug_vid(&attr->attr.attr.vid);
+}
+
+static const struct {
+	const char *name;
+	int (*process) (struct mvrp *mvrp, uint64_t now, uint8_t attr_type,
+			const void *m, uint8_t event, uint8_t param, int num);
+	int (*encode) (struct mvrp *mvrp, struct attr *attr, void *m);
+	void (*notify) (struct mvrp *mvrp, uint64_t now, struct attr *attr, uint8_t notify);
+} dispatch[] = {
+	[AVB_MVRP_ATTRIBUTE_TYPE_VID] = { "vid", process_vid, encode_vid, notify_vid },
+};
+
+static int mvrp_process(void *data, uint64_t now, uint8_t attribute_type, const void *value,
+			uint8_t event, uint8_t param, int index)
+{
+	struct mvrp *mvrp = data;
+	return dispatch[attribute_type].process(mvrp, now,
+				attribute_type, value, event, param, index);
+}
+
+static const struct avb_mrp_parse_info info = {
+	AVB_VERSION_MRP_PARSE_INFO,
+	.check_header = mvrp_check_header,
+	.attr_event = mvrp_attr_event,
+	.process = mvrp_process,
+};
+
+static int mvrp_message(struct mvrp *mvrp, uint64_t now, const void *message, int len)
+{
+	pw_log_debug("MVRP");
+	return avb_mrp_parse_packet(mvrp->server->mrp,
+			now, message, len, &info, mvrp);
+}
+
+static void on_socket_data(void *data, int fd, uint32_t mask)
+{
+	struct mvrp *mvrp = data;
+	struct timespec now;
+
+	if (mask & SPA_IO_IN) {
+		int len;
+		uint8_t buffer[2048];
+
+		len = recv(fd, buffer, sizeof(buffer), 0);
+
+		if (len < 0) {
+			pw_log_warn("got recv error: %m");
+		}
+		else if (len < (int)sizeof(struct avb_packet_header)) {
+			pw_log_warn("short packet received (%d < %d)", len,
+					(int)sizeof(struct avb_packet_header));
+		} else {
+			clock_gettime(CLOCK_REALTIME, &now);
+			mvrp_message(mvrp, SPA_TIMESPEC_TO_NSEC(&now), buffer, len);
+		}
+	}
+}
+
+static void mvrp_destroy(void *data)
+{
+	struct mvrp *mvrp = data;
+	spa_hook_remove(&mvrp->server_listener);
+	pw_loop_destroy_source(mvrp->server->impl->loop, mvrp->source);
+	free(mvrp);
+}
+
+static const struct server_events server_events = {
+	AVB_VERSION_SERVER_EVENTS,
+	.destroy = mvrp_destroy,
+};
+
+static void mvrp_notify(void *data, uint64_t now, uint8_t notify)
+{
+	struct attr *a = data;
+	struct mvrp *mvrp = a->mvrp;
+	return dispatch[a->attr.type].notify(mvrp, now, a, notify);
+}
+
+static const struct avb_mrp_attribute_events mrp_attr_events = {
+	AVB_VERSION_MRP_ATTRIBUTE_EVENTS,
+	.notify = mvrp_notify,
+};
+
+struct avb_mvrp_attribute *avb_mvrp_attribute_new(struct avb_mvrp *m,
+		uint8_t type)
+{
+	struct mvrp *mvrp = (struct mvrp*)m;
+	struct avb_mrp_attribute *attr;
+	struct attr *a;
+
+	attr = avb_mrp_attribute_new(mvrp->server->mrp, sizeof(struct attr));
+
+	a = attr->user_data;
+	a->attr.mrp = attr;
+	a->attr.type = type;
+	spa_list_append(&mvrp->attributes, &a->link);
+	avb_mrp_attribute_add_listener(attr, &a->listener, &mrp_attr_events, a);
+
+	return &a->attr;
+}
+
+static void mvrp_event(void *data, uint64_t now, uint8_t event)
+{
+	struct mvrp *mvrp = data;
+	uint8_t buffer[2048];
+	struct avb_packet_mrp *p = (struct avb_packet_mrp*)buffer;
+	struct avb_packet_mrp_footer *f;
+	void *msg = SPA_PTROFF(buffer, sizeof(*p), void);
+	struct attr *a;
+	int len, count = 0;
+	size_t total = sizeof(*p) + 2;
+
+	p->version = AVB_MRP_PROTOCOL_VERSION;
+
+	spa_list_for_each(a, &mvrp->attributes, link) {
+		if (!a->attr.mrp->pending_send)
+			continue;
+		if (dispatch[a->attr.type].encode == NULL)
+			continue;
+
+		pw_log_debug("send %s %s", dispatch[a->attr.type].name,
+				avb_mrp_send_name(a->attr.mrp->pending_send));
+
+		len = dispatch[a->attr.type].encode(mvrp, a, msg);
+		if (len < 0)
+			break;
+
+		count++;
+		msg = SPA_PTROFF(msg, len, void);
+		total += len;
+	}
+	f = (struct avb_packet_mrp_footer *)msg;
+	f->end_mark = 0;
+
+	if (count > 0)
+		avb_server_send_packet(mvrp->server, mvrp_mac, AVB_MVRP_ETH,
+				buffer, total);
+}
+
+static const struct avb_mrp_events mrp_events = {
+	AVB_VERSION_MRP_EVENTS,
+	.event = mvrp_event,
+};
+
+struct avb_mvrp *avb_mvrp_register(struct server *server)
+{
+	struct mvrp *mvrp;
+	int fd, res;
+
+	fd = avb_server_make_socket(server, AVB_MVRP_ETH, mvrp_mac);
+	if (fd < 0) {
+		errno = -fd;
+		return NULL;
+	}
+	mvrp = calloc(1, sizeof(*mvrp));
+	if (mvrp == NULL) {
+		res = -errno;
+		goto error_close;
+	}
+
+	mvrp->server = server;
+	spa_list_init(&mvrp->attributes);
+
+	mvrp->source = pw_loop_add_io(server->impl->loop, fd, SPA_IO_IN, true, on_socket_data, mvrp);
+	if (mvrp->source == NULL) {
+		res = -errno;
+		pw_log_error("mvrp %p: can't create mvrp source: %m", mvrp);
+		goto error_no_source;
+	}
+	avdecc_server_add_listener(server, &mvrp->server_listener, &server_events, mvrp);
+	avb_mrp_add_listener(server->mrp, &mvrp->mrp_listener, &mrp_events, mvrp);
+
+	return (struct avb_mvrp*)mvrp;
+
+error_no_source:
+	free(mvrp);
+error_close:
+	close(fd);
+	errno = -res;
+	return NULL;
+}