Exemple #1
0
pa_operation* pa_context_set_name(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata) {
    pa_operation *o;

    pa_assert(c);
    pa_assert(PA_REFCNT_VALUE(c) >= 1);
    pa_assert(name);

    PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);

    if (c->version >= 13) {
        pa_proplist *p = pa_proplist_new();

        pa_proplist_sets(p, PA_PROP_APPLICATION_NAME, name);
        o = pa_context_proplist_update(c, PA_UPDATE_REPLACE, p, cb, userdata);
        pa_proplist_free(p);
    } else {
        pa_tagstruct *t;
        uint32_t tag;

        o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
        t = pa_tagstruct_command(c, PA_COMMAND_SET_CLIENT_NAME, &tag);
        pa_tagstruct_puts(t, name);
        pa_pstream_send_tagstruct(c->pstream, t);
        pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT,  pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
    }

    return o;
}
pa_operation *pa_ext_device_manager_test(
        pa_context *c,
        pa_ext_device_manager_test_cb_t cb,
        void *userdata) {

    uint32_t tag;
    pa_operation *o;
    pa_tagstruct *t;

    pa_assert(c);
    pa_assert(PA_REFCNT_VALUE(c) >= 1);

    PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);

    o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);

    t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
    pa_tagstruct_putu32(t, PA_INVALID_INDEX);
    pa_tagstruct_puts(t, "module-device-manager");
    pa_tagstruct_putu32(t, SUBCOMMAND_TEST);
    pa_pstream_send_tagstruct(c->pstream, t);
    pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, ext_device_manager_test_cb, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);

    return o;
}
pa_operation *pa_ext_stream_restore_subscribe(
        pa_context *c,
        int enable,
        pa_context_success_cb_t cb,
        void *userdata) {

    uint32_t tag;
    pa_operation *o;
    pa_tagstruct *t;

    pa_assert(c);
    pa_assert(PA_REFCNT_VALUE(c) >= 1);

    PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);

    o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);

    t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
    pa_tagstruct_putu32(t, PA_INVALID_INDEX);
    pa_tagstruct_puts(t, "module-stream-restore");
    pa_tagstruct_putu32(t, SUBCOMMAND_SUBSCRIBE);
    pa_tagstruct_put_boolean(t, enable);
    pa_pstream_send_tagstruct(c->pstream, t);
    pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);

    return o;
}
Exemple #4
0
static void setup_context(pa_context *c, pa_iochannel *io) {
    uint8_t cookie[PA_NATIVE_COOKIE_LENGTH];
    pa_tagstruct *t;
    uint32_t tag;

    pa_assert(c);
    pa_assert(io);

    pa_context_ref(c);

    pa_assert(!c->pstream);
    c->pstream = pa_pstream_new(c->mainloop, io, c->mempool);

    pa_pstream_set_die_callback(c->pstream, pstream_die_callback, c);
    pa_pstream_set_receive_packet_callback(c->pstream, pstream_packet_callback, c);
    pa_pstream_set_receive_memblock_callback(c->pstream, pstream_memblock_callback, c);

    pa_assert(!c->pdispatch);
    c->pdispatch = pa_pdispatch_new(c->mainloop, c->use_rtclock, command_table, PA_COMMAND_MAX);

    if (pa_client_conf_load_cookie(c->conf, cookie, sizeof(cookie)) < 0)
        pa_log_info("No cookie loaded. Attempting to connect without.");

    t = pa_tagstruct_command(c, PA_COMMAND_AUTH, &tag);

    c->do_shm =
        pa_mempool_is_shared(c->mempool) &&
        c->is_local;

    pa_log_debug("SHM possible: %s", pa_yes_no(c->do_shm));

    /* Starting with protocol version 13 we use the MSB of the version
     * tag for informing the other side if we could do SHM or not.
     * Starting from version 31, second MSB is used to flag memfd support. */
    pa_tagstruct_putu32(t, PA_PROTOCOL_VERSION | (c->do_shm ? 0x80000000U : 0) |
                        (c->memfd_on_local ? 0x40000000 : 0));
    pa_tagstruct_put_arbitrary(t, cookie, sizeof(cookie));

#ifdef HAVE_CREDS
{
    pa_creds ucred;

    if (pa_iochannel_creds_supported(io))
        pa_iochannel_creds_enable(io);

    ucred.uid = getuid();
    ucred.gid = getgid();

    pa_pstream_send_tagstruct_with_creds(c->pstream, t, &ucred);
}
#else
    pa_pstream_send_tagstruct(c->pstream, t);
#endif

    pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, c, NULL);

    pa_context_set_state(c, PA_CONTEXT_AUTHORIZING);

    pa_context_unref(c);
}
Exemple #5
0
pa_operation *pa_context_proplist_update(pa_context *c, pa_update_mode_t mode, pa_proplist *p, pa_context_success_cb_t cb, void *userdata) {
    pa_operation *o;
    pa_tagstruct *t;
    uint32_t tag;

    pa_assert(c);
    pa_assert(PA_REFCNT_VALUE(c) >= 1);

    PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
    PA_CHECK_VALIDITY_RETURN_NULL(c, mode == PA_UPDATE_SET || mode == PA_UPDATE_MERGE || mode == PA_UPDATE_REPLACE, PA_ERR_INVALID);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 13, PA_ERR_NOTSUPPORTED);

    o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);

    t = pa_tagstruct_command(c, PA_COMMAND_UPDATE_CLIENT_PROPLIST, &tag);
    pa_tagstruct_putu32(t, (uint32_t) mode);
    pa_tagstruct_put_proplist(t, p);

    pa_pstream_send_tagstruct(c->pstream, t);
    pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);

    /* Please note that we don't update c->proplist here, because we
     * don't export that field */

    return o;
}
Exemple #6
0
pa_operation *pa_context_proplist_remove(pa_context *c, const char *const keys[], pa_context_success_cb_t cb, void *userdata) {
    pa_operation *o;
    pa_tagstruct *t;
    uint32_t tag;
    const char * const *k;

    pa_assert(c);
    pa_assert(PA_REFCNT_VALUE(c) >= 1);

    PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
    PA_CHECK_VALIDITY_RETURN_NULL(c, keys && keys[0], PA_ERR_INVALID);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 13, PA_ERR_NOTSUPPORTED);

    o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);

    t = pa_tagstruct_command(c, PA_COMMAND_REMOVE_CLIENT_PROPLIST, &tag);

    for (k = keys; *k; k++)
        pa_tagstruct_puts(t, *k);

    pa_tagstruct_puts(t, NULL);

    pa_pstream_send_tagstruct(c->pstream, t);
    pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);

    /* Please note that we don't update c->proplist here, because we
     * don't export that field */

    return o;
}
pa_operation *pa_ext_device_manager_enable_role_device_priority_routing(
        pa_context *c,
        int enable,
        pa_context_success_cb_t cb,
        void *userdata) {

    uint32_t tag;
    pa_operation *o = NULL;
    pa_tagstruct *t = NULL;

    pa_assert(c);
    pa_assert(PA_REFCNT_VALUE(c) >= 1);

    PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);

    o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);

    t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
    pa_tagstruct_putu32(t, PA_INVALID_INDEX);
    pa_tagstruct_puts(t, "module-device-manager");
    pa_tagstruct_putu32(t, SUBCOMMAND_ROLE_DEVICE_PRIORITY_ROUTING);
    pa_tagstruct_put_boolean(t, !!enable);

    pa_pstream_send_tagstruct(c->pstream, t);
    pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);

    return o;
}
pa_operation *pa_ext_device_manager_delete(
        pa_context *c,
        const char *const s[],
        pa_context_success_cb_t cb,
        void *userdata) {

    uint32_t tag;
    pa_operation *o = NULL;
    pa_tagstruct *t = NULL;
    const char *const *k;

    pa_assert(c);
    pa_assert(PA_REFCNT_VALUE(c) >= 1);
    pa_assert(s);

    PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);

    o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);

    t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
    pa_tagstruct_putu32(t, PA_INVALID_INDEX);
    pa_tagstruct_puts(t, "module-device-manager");
    pa_tagstruct_putu32(t, SUBCOMMAND_DELETE);

    for (k = s; *k; k++) {
        if (!*k || !**k)
            goto fail;

        pa_tagstruct_puts(t, *k);
    }

    pa_pstream_send_tagstruct(c->pstream, t);
    pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);

    return o;

fail:
    if (o) {
        pa_operation_cancel(o);
        pa_operation_unref(o);
    }

    if (t)
        pa_tagstruct_free(t);

    pa_context_set_error(c, PA_ERR_INVALID);
    return NULL;
}
Exemple #9
0
pa_operation* pa_context_set_default_source(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata) {
    pa_tagstruct *t;
    pa_operation *o;
    uint32_t tag;

    pa_assert(c);
    pa_assert(PA_REFCNT_VALUE(c) >= 1);

    PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);

    o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
    t = pa_tagstruct_command(c, PA_COMMAND_SET_DEFAULT_SOURCE, &tag);
    pa_tagstruct_puts(t, name);
    pa_pstream_send_tagstruct(c->pstream, t);
    pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT,  pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);

    return o;
}
Exemple #10
0
pa_operation* pa_context_send_simple_command(pa_context *c, uint32_t command, pa_pdispatch_cb_t internal_cb, pa_operation_cb_t cb, void *userdata) {
    pa_tagstruct *t;
    pa_operation *o;
    uint32_t tag;

    pa_assert(c);
    pa_assert(PA_REFCNT_VALUE(c) >= 1);

    PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);

    o = pa_operation_new(c, NULL, cb, userdata);

    t = pa_tagstruct_command(c, command, &tag);
    pa_pstream_send_tagstruct(c->pstream, t);
    pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, internal_cb, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);

    return o;
}
Exemple #11
0
int pa_stream_connect_upload(pa_stream *s, size_t length) {
    pa_tagstruct *t;
    uint32_t tag;
    const char *name;

    pa_assert(s);
    pa_assert(PA_REFCNT_VALUE(s) >= 1);

    PA_CHECK_VALIDITY(s->context, !pa_detect_fork(), PA_ERR_FORKED);
    PA_CHECK_VALIDITY(s->context, s->state == PA_STREAM_UNCONNECTED, PA_ERR_BADSTATE);
    PA_CHECK_VALIDITY(s->context, length > 0, PA_ERR_INVALID);
    PA_CHECK_VALIDITY(s->context, length == (size_t) (uint32_t) length, PA_ERR_INVALID);
    PA_CHECK_VALIDITY(s->context, s->context->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);

    if (!(name = pa_proplist_gets(s->proplist, PA_PROP_EVENT_ID)))
        name = pa_proplist_gets(s->proplist, PA_PROP_MEDIA_NAME);

    PA_CHECK_VALIDITY(s->context, name && *name && pa_utf8_valid(name), PA_ERR_INVALID);

    pa_stream_ref(s);

    s->direction = PA_STREAM_UPLOAD;
    s->flags = 0;

    t = pa_tagstruct_command(s->context, PA_COMMAND_CREATE_UPLOAD_STREAM, &tag);

    pa_tagstruct_puts(t, name);
    pa_tagstruct_put_sample_spec(t, &s->sample_spec);
    pa_tagstruct_put_channel_map(t, &s->channel_map);
    pa_tagstruct_putu32(t, (uint32_t) length);

    if (s->context->version >= 13)
        pa_tagstruct_put_proplist(t, s->proplist);

    pa_pstream_send_tagstruct(s->context->pstream, t);
    pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_create_stream_callback, s, NULL);

    pa_stream_set_state(s, PA_STREAM_CREATING);

    pa_stream_unref(s);
    return 0;
}
Exemple #12
0
pa_operation *pa_context_play_sample_with_proplist(pa_context *c, const char *name, const char *dev, pa_volume_t volume, pa_proplist *p, pa_context_play_sample_cb_t cb, void *userdata) {
    pa_operation *o;
    pa_tagstruct *t;
    uint32_t tag;

    pa_assert(c);
    pa_assert(PA_REFCNT_VALUE(c) >= 1);

    PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
    PA_CHECK_VALIDITY_RETURN_NULL(c, name && *name, PA_ERR_INVALID);
    PA_CHECK_VALIDITY_RETURN_NULL(c, !dev || *dev, PA_ERR_INVALID);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 13, PA_ERR_NOTSUPPORTED);

    o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);

    if (!dev)
        dev = c->conf->default_sink;

    t = pa_tagstruct_command(c, PA_COMMAND_PLAY_SAMPLE, &tag);
    pa_tagstruct_putu32(t, PA_INVALID_INDEX);
    pa_tagstruct_puts(t, dev);

    if (!PA_VOLUME_IS_VALID(volume) && c->version < 15)
        volume = PA_VOLUME_NORM;

    pa_tagstruct_putu32(t, volume);
    pa_tagstruct_puts(t, name);

    if (p)
        pa_tagstruct_put_proplist(t, p);
    else {
        p = pa_proplist_new();
        pa_tagstruct_put_proplist(t, p);
        pa_proplist_free(p);
    }

    pa_pstream_send_tagstruct(c->pstream, t);
    pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, play_sample_with_proplist_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);

    return o;
}
pa_operation *pa_ext_device_manager_reorder_devices_for_role(
        pa_context *c,
        const char* role,
        const char** devices,
        pa_context_success_cb_t cb,
        void *userdata) {

    uint32_t tag, i;
    pa_operation *o = NULL;
    pa_tagstruct *t = NULL;

    pa_assert(c);
    pa_assert(PA_REFCNT_VALUE(c) >= 1);

    PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);

    pa_assert(role);
    pa_assert(devices);

    o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);

    t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
    pa_tagstruct_putu32(t, PA_INVALID_INDEX);
    pa_tagstruct_puts(t, "module-device-manager");
    pa_tagstruct_putu32(t, SUBCOMMAND_REORDER);
    pa_tagstruct_puts(t, role);

    i = 0; while (devices[i]) i++;
    pa_tagstruct_putu32(t, i);

    i = 0;
    while (devices[i])
        pa_tagstruct_puts(t, devices[i++]);

    pa_pstream_send_tagstruct(c->pstream, t);
    pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);

    return o;
}
Exemple #14
0
int pa_stream_finish_upload(pa_stream *s) {
    pa_tagstruct *t;
    uint32_t tag;

    pa_assert(s);
    pa_assert(PA_REFCNT_VALUE(s) >= 1);

    PA_CHECK_VALIDITY(s->context, !pa_detect_fork(), PA_ERR_FORKED);
    PA_CHECK_VALIDITY(s->context, s->channel_valid, PA_ERR_BADSTATE);
    PA_CHECK_VALIDITY(s->context, s->context->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);

    pa_stream_ref(s);

    t = pa_tagstruct_command(s->context, PA_COMMAND_FINISH_UPLOAD_STREAM, &tag);
    pa_tagstruct_putu32(t, s->channel);
    pa_pstream_send_tagstruct(s->context->pstream, t);
    pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_disconnect_callback, s, NULL);

    pa_stream_unref(s);
    return 0;
}
Exemple #15
0
static void setup_complete_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
    pa_context *c = userdata;

    pa_assert(pd);
    pa_assert(c);
    pa_assert(c->state == PA_CONTEXT_AUTHORIZING || c->state == PA_CONTEXT_SETTING_NAME);

    pa_context_ref(c);

    if (command != PA_COMMAND_REPLY) {
        pa_context_handle_error(c, command, t, TRUE);
        goto finish;
    }

    switch(c->state) {
        case PA_CONTEXT_AUTHORIZING: {
            pa_tagstruct *reply;
            pa_bool_t shm_on_remote = FALSE;

            if (pa_tagstruct_getu32(t, &c->version) < 0 ||
                !pa_tagstruct_eof(t)) {
                pa_context_fail(c, PA_ERR_PROTOCOL);
                goto finish;
            }

            /* Minimum supported version */
            if (c->version < 8) {
                pa_context_fail(c, PA_ERR_VERSION);
                goto finish;
            }

            /* Starting with protocol version 13 the MSB of the version
               tag reflects if shm is available for this connection or
               not. */
            if (c->version >= 13) {
                shm_on_remote = !!(c->version & 0x80000000U);
                c->version &= 0x7FFFFFFFU;
            }

            pa_log_debug("Protocol version: remote %u, local %u", c->version, PA_PROTOCOL_VERSION);

            /* Enable shared memory support if possible */
            if (c->do_shm)
                if (c->version < 10 || (c->version >= 13 && !shm_on_remote))
                    c->do_shm = FALSE;

            if (c->do_shm) {

                /* Only enable SHM if both sides are owned by the same
                 * user. This is a security measure because otherwise
                 * data private to the user might leak. */

#ifdef HAVE_CREDS
                const pa_creds *creds;
                if (!(creds = pa_pdispatch_creds(pd)) || getuid() != creds->uid)
                    c->do_shm = FALSE;
#endif
            }

            pa_log_debug("Negotiated SHM: %s", pa_yes_no(c->do_shm));
            pa_pstream_enable_shm(c->pstream, c->do_shm);

            reply = pa_tagstruct_command(c, PA_COMMAND_SET_CLIENT_NAME, &tag);

            if (c->version >= 13) {
                pa_init_proplist(c->proplist);
                pa_tagstruct_put_proplist(reply, c->proplist);
            } else
                pa_tagstruct_puts(reply, pa_proplist_gets(c->proplist, PA_PROP_APPLICATION_NAME));

            pa_pstream_send_tagstruct(c->pstream, reply);
            pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, c, NULL);

            pa_context_set_state(c, PA_CONTEXT_SETTING_NAME);
            break;
        }

        case PA_CONTEXT_SETTING_NAME :

            if ((c->version >= 13 && (pa_tagstruct_getu32(t, &c->client_index) < 0 ||
                                      c->client_index == PA_INVALID_INDEX)) ||
                !pa_tagstruct_eof(t)) {
                pa_context_fail(c, PA_ERR_PROTOCOL);
                goto finish;
            }

            pa_context_set_state(c, PA_CONTEXT_READY);
            break;

        default:
            pa_assert_not_reached();
    }

finish:
    pa_context_unref(c);
}
Exemple #16
0
static void setup_complete_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
    pa_context *c = userdata;

    pa_assert(pd);
    pa_assert(c);
    pa_assert(c->state == PA_CONTEXT_AUTHORIZING || c->state == PA_CONTEXT_SETTING_NAME);

    pa_context_ref(c);

    if (command != PA_COMMAND_REPLY) {
        pa_context_handle_error(c, command, t, true);
        goto finish;
    }

    switch(c->state) {
        case PA_CONTEXT_AUTHORIZING: {
            pa_tagstruct *reply;
            bool shm_on_remote = false;
            bool memfd_on_remote = false;

            if (pa_tagstruct_getu32(t, &c->version) < 0 ||
                !pa_tagstruct_eof(t)) {
                pa_context_fail(c, PA_ERR_PROTOCOL);
                goto finish;
            }

            /* Minimum supported version */
            if (c->version < 8) {
                pa_context_fail(c, PA_ERR_VERSION);
                goto finish;
            }

            /* Starting with protocol version 13 the MSB of the version
               tag reflects if shm is available for this connection or
               not. */
            if (c->version >= 13) {
                shm_on_remote = !!(c->version & 0x80000000U);

                /* Starting with protocol version 31, the second MSB of the version
                 * tag reflects whether memfd is supported on the other PA end. */
                if (c->version >= 31)
                    memfd_on_remote = !!(c->version & 0x40000000U);

                /* Reserve the two most-significant _bytes_ of the version tag
                 * for flags. */
                c->version &= 0x0000FFFFU;
            }

            pa_log_debug("Protocol version: remote %u, local %u", c->version, PA_PROTOCOL_VERSION);

            /* Enable shared memory support if possible */
            if (c->do_shm)
                if (c->version < 10 || (c->version >= 13 && !shm_on_remote))
                    c->do_shm = false;

            if (c->do_shm) {

                /* Only enable SHM if both sides are owned by the same
                 * user. This is a security measure because otherwise
                 * data private to the user might leak. */

#ifdef HAVE_CREDS
                const pa_creds *creds;
                if (!(creds = pa_pdispatch_creds(pd)) || getuid() != creds->uid)
                    c->do_shm = false;
#endif
            }

            pa_log_debug("Negotiated SHM: %s", pa_yes_no(c->do_shm));
            pa_pstream_enable_shm(c->pstream, c->do_shm);

            c->shm_type = PA_MEM_TYPE_PRIVATE;
            if (c->do_shm) {
                if (c->version >= 31 && memfd_on_remote && c->memfd_on_local) {
                    const char *reason;

                    pa_pstream_enable_memfd(c->pstream);
                    if (pa_mempool_is_memfd_backed(c->mempool))
                        if (pa_pstream_register_memfd_mempool(c->pstream, c->mempool, &reason))
                            pa_log("Failed to regester memfd mempool. Reason: %s", reason);

                    /* Even if memfd pool registration fails, the negotiated SHM type
                     * shall remain memfd as both endpoints claim to support it. */
                    c->shm_type = PA_MEM_TYPE_SHARED_MEMFD;
                } else
                    c->shm_type = PA_MEM_TYPE_SHARED_POSIX;
            }

            pa_log_debug("Memfd possible: %s", pa_yes_no(c->memfd_on_local));
            pa_log_debug("Negotiated SHM type: %s", pa_mem_type_to_string(c->shm_type));

            reply = pa_tagstruct_command(c, PA_COMMAND_SET_CLIENT_NAME, &tag);

            if (c->version >= 13) {
                pa_init_proplist(c->proplist);
                pa_tagstruct_put_proplist(reply, c->proplist);
            } else
                pa_tagstruct_puts(reply, pa_proplist_gets(c->proplist, PA_PROP_APPLICATION_NAME));

            pa_pstream_send_tagstruct(c->pstream, reply);
            pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, c, NULL);

            pa_context_set_state(c, PA_CONTEXT_SETTING_NAME);
            break;
        }

        case PA_CONTEXT_SETTING_NAME :

            if ((c->version >= 13 && (pa_tagstruct_getu32(t, &c->client_index) < 0 ||
                                      c->client_index == PA_INVALID_INDEX)) ||
                !pa_tagstruct_eof(t)) {
                pa_context_fail(c, PA_ERR_PROTOCOL);
                goto finish;
            }

            pa_context_set_state(c, PA_CONTEXT_READY);
            break;

        default:
            pa_assert_not_reached();
    }

finish:
    pa_context_unref(c);
}
pa_operation *pa_ext_stream_restore_write(
        pa_context *c,
        pa_update_mode_t mode,
        const pa_ext_stream_restore_info data[],
        unsigned n,
        int apply_immediately,
        pa_context_success_cb_t cb,
        void *userdata) {

    uint32_t tag;
    pa_operation *o = NULL;
    pa_tagstruct *t = NULL;

    pa_assert(c);
    pa_assert(PA_REFCNT_VALUE(c) >= 1);
    pa_assert(mode == PA_UPDATE_MERGE || mode == PA_UPDATE_REPLACE || mode == PA_UPDATE_SET);
    pa_assert(data);

    PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
    PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);

    o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);

    t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
    pa_tagstruct_putu32(t, PA_INVALID_INDEX);
    pa_tagstruct_puts(t, "module-stream-restore");
    pa_tagstruct_putu32(t, SUBCOMMAND_WRITE);

    pa_tagstruct_putu32(t, mode);
    pa_tagstruct_put_boolean(t, apply_immediately);

    for (; n > 0; n--, data++) {
        if (!data->name || !*data->name)
            goto fail;

        pa_tagstruct_puts(t, data->name);

        if (data->volume.channels > 0 &&
            !pa_cvolume_compatible_with_channel_map(&data->volume, &data->channel_map))
            goto fail;

        pa_tagstruct_put_channel_map(t, &data->channel_map);
        pa_tagstruct_put_cvolume(t, &data->volume);
        pa_tagstruct_puts(t, data->device);
        pa_tagstruct_put_boolean(t, data->mute);
    }

    pa_pstream_send_tagstruct(c->pstream, t);
    pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);

    return o;

fail:
    pa_operation_cancel(o);
    pa_operation_unref(o);

    pa_tagstruct_free(t);

    pa_context_set_error(c, PA_ERR_INVALID);
    return NULL;
}