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/* 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 "utils.h"
#include "mmrp.h"
static const uint8_t mmrp_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_source *source;
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_attribute_update_state(a->attr.mrp, now, 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_attribute_rx_event(a->attr.mrp, now, 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_attribute_rx_event(a->attr.mrp, now, 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(struct mmrp *mmrp, uint64_t now, const void *message, int len)
{
pw_log_debug("MMRP");
return avb_mrp_parse_packet(mmrp->server->mrp,
now, message, len, &info, mmrp);
}
static void on_socket_data(void *data, int fd, uint32_t mask)
{
struct mmrp *mmrp = 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);
mmrp_message(mmrp, SPA_TIMESPEC_TO_NSEC(&now), buffer, len);
}
}
}
static void mmrp_destroy(void *data)
{
struct mmrp *mmrp = data;
spa_hook_remove(&mmrp->server_listener);
pw_loop_destroy_source(mmrp->server->impl->loop, mmrp->source);
free(mmrp);
}
static const struct server_events server_events = {
AVB_VERSION_SERVER_EVENTS,
.destroy = mmrp_destroy,
};
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;
int fd, res;
fd = avb_server_make_socket(server, AVB_MMRP_ETH, mmrp_mac);
if (fd < 0) {
errno = -fd;
return NULL;
}
mmrp = calloc(1, sizeof(*mmrp));
if (mmrp == NULL) {
res = -errno;
goto error_close;
}
mmrp->server = server;
spa_list_init(&mmrp->attributes);
mmrp->source = pw_loop_add_io(server->impl->loop, fd, SPA_IO_IN, true, on_socket_data, mmrp);
if (mmrp->source == NULL) {
res = -errno;
pw_log_error("mmrp %p: can't create mmrp source: %m", mmrp);
goto error_no_source;
}
avdecc_server_add_listener(server, &mmrp->server_listener, &server_events, mmrp);
return (struct avb_mmrp*)mmrp;
error_no_source:
free(mmrp);
error_close:
close(fd);
errno = -res;
return NULL;
}
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