avb: avbtp -> avb

src/modules/module-avb/avdecc.c

@@ -0,0 +1,271 @@
+/* PipeWire
+ *
+ * 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 <linux/if_ether.h>
+#include <linux/if_packet.h>
+#include <linux/net_tstamp.h>
+#include <limits.h>
+#include <net/if.h>
+#include <arpa/inet.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+#include <spa/support/cpu.h>
+#include <spa/debug/mem.h>
+
+#include <pipewire/pipewire.h>
+
+#include "avb.h"
+#include "packets.h"
+#include "internal.h"
+#include "acmp.h"
+#include "adp.h"
+#include "aecp.h"
+#include "maap.h"
+#include "mmrp.h"
+#include "msrp.h"
+#include "mvrp.h"
+#include "descriptors.h"
+
+#define DEFAULT_INTERVAL	1
+
+#define server_emit(s,m,v,...) spa_hook_list_call(&s->listener_list, struct server_events, m, v, ##__VA_ARGS__)
+#define server_emit_destroy(s)		server_emit(s, destroy, 0)
+#define server_emit_message(s,n,m,l)	server_emit(s, message, 0, n, m, l)
+#define server_emit_periodic(s,n)	server_emit(s, periodic, 0, n)
+#define server_emit_command(s,n,c,a,f)	server_emit(s, command, 0, n, c, a, f)
+
+static void on_timer_event(void *data, uint64_t expirations)
+{
+	struct server *server = data;
+	struct timespec now;
+	clock_gettime(CLOCK_REALTIME, &now);
+	server_emit_periodic(server, SPA_TIMESPEC_TO_NSEC(&now));
+}
+
+static void on_socket_data(void *data, int fd, uint32_t mask)
+{
+	struct server *server = 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);
+			server_emit_message(server, SPA_TIMESPEC_TO_NSEC(&now), buffer, len);
+		}
+	}
+}
+
+int avb_server_send_packet(struct server *server, const uint8_t dest[6],
+		uint16_t type, void *data, size_t size)
+{
+	struct avb_ethernet_header *hdr = (struct avb_ethernet_header*)data;
+	int res = 0;
+
+	memcpy(hdr->dest, dest, ETH_ALEN);
+	memcpy(hdr->src, server->mac_addr, ETH_ALEN);
+	hdr->type = htons(type);
+
+	if (send(server->source->fd, data, size, 0) < 0) {
+		res = -errno;
+		pw_log_warn("got send error: %m");
+	}
+	return res;
+}
+
+static int setup_socket(struct server *server)
+{
+	struct impl *impl = server->impl;
+	int fd, res;
+	struct ifreq req;
+	struct packet_mreq mreq;
+	struct sockaddr_ll sll;
+	struct timespec value, interval;
+
+	fd = socket(AF_PACKET, SOCK_RAW|SOCK_NONBLOCK, htons(ETH_P_ALL));
+	if (fd < 0) {
+		pw_log_error("socket() failed: %m");
+		return -errno;
+	}
+
+	spa_zero(req);
+	snprintf(req.ifr_name, sizeof(req.ifr_name), "%s", server->ifname);
+	if (ioctl(fd, SIOCGIFINDEX, &req) < 0) {
+		res = -errno;
+		pw_log_error("SIOCGIFINDEX %s failed: %m", server->ifname);
+		goto error_close;
+	}
+	server->ifindex = req.ifr_ifindex;
+
+	spa_zero(req);
+	snprintf(req.ifr_name, sizeof(req.ifr_name), "%s", server->ifname);
+	if (ioctl(fd, SIOCGIFHWADDR, &req) < 0) {
+		res = -errno;
+		pw_log_error("SIOCGIFHWADDR %s failed: %m", server->ifname);
+		goto error_close;
+	}
+	memcpy(server->mac_addr, req.ifr_hwaddr.sa_data, sizeof(server->mac_addr));
+
+	server->entity_id = (uint64_t)server->mac_addr[0] << 56 |
+			(uint64_t)server->mac_addr[1] << 48 |
+			(uint64_t)server->mac_addr[2] << 40 |
+			(uint64_t)0xff << 32 |
+			(uint64_t)0xfe << 24 |
+			(uint64_t)server->mac_addr[3] << 16 |
+			(uint64_t)server->mac_addr[4] << 8 |
+			(uint64_t)server->mac_addr[5];
+
+	pw_log_info("%lx %d", server->entity_id, server->ifindex);
+
+	spa_zero(mreq);
+	mreq.mr_ifindex = server->ifindex;
+	mreq.mr_type = PACKET_MR_PROMISC;
+	if (setsockopt(fd, SOL_PACKET, PACKET_ADD_MEMBERSHIP,
+				&mreq, sizeof(mreq)) < 0) {
+		res = -errno;
+		pw_log_error("setsockopt(ADD_MEMBERSHIP) failed: %m");
+		goto error_close;
+	}
+
+	spa_zero(sll);
+	sll.sll_family = AF_PACKET;
+	sll.sll_protocol = htons(ETH_P_ALL);
+	sll.sll_ifindex = server->ifindex;
+	if (bind(fd, (struct sockaddr *) &sll, sizeof(sll)) < 0) {
+		res = -errno;
+		pw_log_error("bind() failed: %m");
+		goto error_close;
+	}
+
+	server->source = pw_loop_add_io(impl->loop, fd, SPA_IO_IN, true, on_socket_data, server);
+	if (server->source == NULL) {
+		res = -errno;
+		pw_log_error("server %p: can't create server source: %m", impl);
+		goto error_close;
+	}
+	server->timer = pw_loop_add_timer(impl->loop, on_timer_event, server);
+	if (server->timer == NULL) {
+		res = -errno;
+		pw_log_error("server %p: can't create timer source: %m", impl);
+		goto error_close;
+	}
+	value.tv_sec = 0;
+	value.tv_nsec = 1;
+	interval.tv_sec = DEFAULT_INTERVAL;
+	interval.tv_nsec = 0;
+	pw_loop_update_timer(impl->loop, server->timer, &value, &interval, false);
+
+	return 0;
+
+error_close:
+	close(fd);
+	return res;
+}
+
+struct server *avdecc_server_new(struct impl *impl, const char *ifname, struct spa_dict *props)
+{
+	struct server *server;
+	int res = 0;
+
+	server = calloc(1, sizeof(*server));
+	if (server == NULL)
+		return NULL;
+
+	server->impl = impl;
+	spa_list_append(&impl->servers, &server->link);
+	server->ifname = strdup(ifname);
+	spa_hook_list_init(&server->listener_list);
+	spa_list_init(&server->descriptors);
+
+	server->debug_messages = false;
+
+	if ((res = setup_socket(server)) < 0)
+		goto error_free;
+
+	init_descriptors(server);
+
+	server->mrp = avb_mrp_new(server);
+	if (server->mrp == NULL)
+		goto error_free;
+
+	avb_aecp_register(server);
+	avb_maap_register(server);
+	server->mmrp = avb_mmrp_register(server);
+	server->msrp = avb_msrp_register(server);
+	server->mvrp = avb_mvrp_register(server);
+	avb_adp_register(server);
+	avb_acmp_register(server);
+
+	server->domain_attr = avb_msrp_attribute_new(server->msrp,
+			AVB_MSRP_ATTRIBUTE_TYPE_DOMAIN);
+	server->domain_attr->attr.domain.sr_class_id = 6;
+	server->domain_attr->attr.domain.sr_class_priority = 3;
+	server->domain_attr->attr.domain.sr_class_vid = htons(2);
+
+	avb_mrp_mad_begin(server->mrp, 0, server->domain_attr->mrp);
+	avb_mrp_mad_join(server->mrp, 0, server->domain_attr->mrp, true);
+
+	server->listener_attr = avb_msrp_attribute_new(server->msrp,
+			AVB_MSRP_ATTRIBUTE_TYPE_LISTENER);
+	server->listener_attr->attr.listener.stream_id = htobe64(0);
+	avb_mrp_mad_begin(server->mrp, 0, server->listener_attr->mrp);
+
+	return server;
+
+error_free:
+	free(server);
+	if (res < 0)
+		errno = -res;
+	return NULL;
+}
+
+void avdecc_server_add_listener(struct server *server, struct spa_hook *listener,
+		const struct server_events *events, void *data)
+{
+	spa_hook_list_append(&server->listener_list, listener, events, data);
+}
+
+void avdecc_server_free(struct server *server)
+{
+	struct impl *impl = server->impl;
+
+	spa_list_remove(&server->link);
+	if (server->source)
+		pw_loop_destroy_source(impl->loop, server->source);
+	if (server->timer)
+		pw_loop_destroy_source(impl->loop, server->source);
+	spa_hook_list_clean(&server->listener_list);
+	free(server);
+}