mikael-lovqvists-claude-agent
fe350e531e
Sends 6-byte framed announcements to 224.0.0.251:5353 on startup and every interval_ms (default 5s). Receive thread maintains a peer table (max 64 entries); fires on_peer_found for new peers, on_peer_lost when a peer misses timeout_intervals (default 3) consecutive intervals. Own announcements are filtered by name+site_id. SO_REUSEADDR+REUSEPORT allows multiple processes on the same host for testing. discovery_cli: announce <name> <tcp_port> [flags] — prints found/lost events. Also notes future config module in planning.md. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
#pragma once
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#include <stdint.h>
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#include "error.h"
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#define DISCOVERY_MULTICAST_GROUP "224.0.0.251"
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#define DISCOVERY_PORT 5353
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#define DISCOVERY_PROTOCOL_VERSION 1
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#define DISCOVERY_MAX_NAME_LEN 255
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#define DISCOVERY_MAX_PEERS 64
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/* function_flags bits — matches protocol doc */
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#define DISCOVERY_FLAG_SOURCE (1u << 0)
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#define DISCOVERY_FLAG_RELAY (1u << 1)
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#define DISCOVERY_FLAG_SINK (1u << 2)
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#define DISCOVERY_FLAG_CONTROLLER (1u << 3)
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struct Discovery_Peer {
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uint32_t addr; /* source IPv4, network byte order */
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uint16_t site_id;
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uint16_t tcp_port;
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uint16_t function_flags;
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char name[DISCOVERY_MAX_NAME_LEN + 1];
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};
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typedef void (*Discovery_Peer_Found_Cb)(const struct Discovery_Peer *peer, void *userdata);
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typedef void (*Discovery_Peer_Lost_Cb)(const struct Discovery_Peer *peer, void *userdata);
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struct Discovery_Config {
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/* our own identity */
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uint16_t site_id;
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uint16_t tcp_port;
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uint16_t function_flags;
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const char *name;
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/* timing */
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uint32_t interval_ms; /* announcement interval; 0 = use default (5000) */
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uint32_t timeout_intervals; /* missed intervals before peer_lost; 0 = use default (3) */
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/* callbacks */
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Discovery_Peer_Found_Cb on_peer_found; /* required */
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Discovery_Peer_Lost_Cb on_peer_lost; /* optional */
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void *userdata;
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};
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struct Discovery;
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struct App_Error discovery_create(struct Discovery **out, struct Discovery_Config *config);
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struct App_Error discovery_start(struct Discovery *d);
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void discovery_destroy(struct Discovery *d);
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