Function lookupClientByID

app/redis-6.2.6/src/networking.c:1491–1495

Return a client by ID, or NULL if the client ID is not in the set * of registered clients. Note that "fake clients", created with -1 as FD, * are not registered clients. */

 * of registered clients. Note that "fake clients", created with -1 as FD,
 * are not registered clients. */
client *lookupClientByID(uint64_t id) {
    id = htonu64(id);
    client *c = raxFind(server.clients_index,(unsigned char*)&id,sizeof(id));
    return (c == raxNotFound) ? NULL : c;
}

/* Write data in output buffers to client. Return C_OK if the client
 * is still valid after the call, C_ERR if it was freed because of some