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milan-avb: aecp-aem: GET_AS_PATH placeholder per IEEE 1722.1-2021 Section 7.4.41

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hackerman-kl 2026-04-26 21:04:16 +02:00 • committed by Wim Taymans
parent df1605a333
commit deeea620f6
1 changed files with 43 additions and 2 deletions
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45
src/modules/module-avb/aecp-aem-cmds-resps/cmd-get-as-path.c
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@ -1,15 +1,56 @@
/* SPDX-FileCopyrightText: Copyright © 2025 Alexandre Malki */
/* SPDX-License-Identifier: MIT */
#include <endian.h>
#include "../aecp.h"
#include "../aecp-aem.h"
#include "../internal.h"
#include "cmd-get-as-path.h"
#include "cmd-resp-helpers.h"
/* IEEE 1722.1-2021 Section 7.4.41 GET_AS_PATH placeholder: single-entry path
* pointing at the entity itself, until gPTP is wired up. */
int handle_cmd_get_as_path_milan_v12(struct aecp *aecp, int64_t now,
const void *m, int len)
{
pw_log_warn("%s: not yet implemented", __func__);
return reply_not_implemented(aecp, m, len);
uint8_t buf[2048];
struct avb_ethernet_header *h_reply;
struct avb_packet_aecp_aem *p_reply;
struct avb_packet_aecp_aem_get_as_path *body;
uint64_t *path;
int total = (int)(sizeof(struct avb_ethernet_header) +
sizeof(struct avb_packet_aecp_aem) +
sizeof(struct avb_packet_aecp_aem_get_as_path) +
sizeof(uint64_t));
(void)now;
if (total > (int)sizeof(buf))
return reply_no_resources(aecp, m, len);
if (len < (int)(sizeof(*h_reply) + sizeof(*p_reply) +
sizeof(*body)))
return reply_bad_arguments(aecp, m, len);
memcpy(buf, m, len);
if (len < total)
memset(buf + len, 0, total - len);
h_reply = (struct avb_ethernet_header *)buf;
p_reply = SPA_PTROFF(h_reply, sizeof(*h_reply), void);
/* IEEE 1722.1-2021 Section 9.2.1.1.7: CDL excludes the 12-octet AVTPDU common. */
AVB_PACKET_SET_LENGTH(&p_reply->aecp.hdr,
(uint16_t)(total - sizeof(*h_reply) -
sizeof(struct avb_packet_header) -
sizeof(uint64_t)));
body = (struct avb_packet_aecp_aem_get_as_path *)p_reply->payload;
body->reserved = htons(1);
path = (uint64_t *)(body + 1);
*path = htobe64(aecp->server->entity_id);
return reply_success(aecp, buf, total);
}