1 files changed, 2351 insertions, 0 deletions

diff --git a/src/modules/module-tunnel.c b/src/modules/module-tunnel.c
new file mode 100644
index 0000000..4c384ee
--- /dev/null
+++ b/src/modules/module-tunnel.c
@@ -0,0 +1,2351 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef HAVE_X11
+#include <xcb/xcb.h>
+#endif
+
+#include <pulse/rtclock.h>
+#include <pulse/timeval.h>
+#include <pulse/util.h>
+#include <pulse/version.h>
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/module.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/log.h>
+#include <pulsecore/core-subscribe.h>
+#include <pulsecore/pdispatch.h>
+#include <pulsecore/pstream.h>
+#include <pulsecore/pstream-util.h>
+#include <pulsecore/socket-client.h>
+#include <pulsecore/time-smoother.h>
+#include <pulsecore/thread.h>
+#include <pulsecore/thread-mq.h>
+#include <pulsecore/core-rtclock.h>
+#include <pulsecore/core-error.h>
+#include <pulsecore/proplist-util.h>
+#include <pulsecore/auth-cookie.h>
+#include <pulsecore/mcalign.h>
+#include <pulsecore/strlist.h>
+
+#ifdef HAVE_X11
+#include <pulsecore/x11prop.h>
+#endif
+
+#define ENV_DEFAULT_SINK "PULSE_SINK"
+#define ENV_DEFAULT_SOURCE "PULSE_SOURCE"
+#define ENV_DEFAULT_SERVER "PULSE_SERVER"
+#define ENV_COOKIE_FILE "PULSE_COOKIE"
+
+#ifdef TUNNEL_SINK
+PA_MODULE_DESCRIPTION("Tunnel module for sinks");
+PA_MODULE_USAGE(
+        "sink_name=<name for the local sink> "
+        "sink_properties=<properties for the local sink> "
+        "auto=<determine server/sink/cookie automatically> "
+        "server=<address> "
+        "sink=<remote sink name> "
+        "cookie=<filename> "
+        "format=<sample format> "
+        "channels=<number of channels> "
+        "rate=<sample rate> "
+        "channel_map=<channel map>");
+#else
+PA_MODULE_DESCRIPTION("Tunnel module for sources");
+PA_MODULE_USAGE(
+        "source_name=<name for the local source> "
+        "source_properties=<properties for the local source> "
+        "auto=<determine server/source/cookie automatically> "
+        "server=<address> "
+        "source=<remote source name> "
+        "cookie=<filename> "
+        "format=<sample format> "
+        "channels=<number of channels> "
+        "rate=<sample rate> "
+        "channel_map=<channel map>");
+#endif
+
+PA_MODULE_AUTHOR("Lennart Poettering");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(false);
+
+static const char* const valid_modargs[] = {
+    "auto",
+    "server",
+    "cookie",
+    "format",
+    "channels",
+    "rate",
+#ifdef TUNNEL_SINK
+    "sink_name",
+    "sink_properties",
+    "sink",
+#else
+    "source_name",
+    "source_properties",
+    "source",
+#endif
+    "channel_map",
+    NULL,
+};
+
+#define DEFAULT_TIMEOUT 5
+
+#define LATENCY_INTERVAL (10*PA_USEC_PER_SEC)
+
+#define MIN_NETWORK_LATENCY_USEC (8*PA_USEC_PER_MSEC)
+
+#ifdef TUNNEL_SINK
+
+enum {
+    SINK_MESSAGE_REQUEST = PA_SINK_MESSAGE_MAX,
+    SINK_MESSAGE_REMOTE_SUSPEND,
+    SINK_MESSAGE_UPDATE_LATENCY,
+    SINK_MESSAGE_POST
+};
+
+#define DEFAULT_TLENGTH_MSEC 150
+#define DEFAULT_MINREQ_MSEC 25
+
+#else
+
+enum {
+    SOURCE_MESSAGE_POST = PA_SOURCE_MESSAGE_MAX,
+    SOURCE_MESSAGE_REMOTE_SUSPEND,
+    SOURCE_MESSAGE_UPDATE_LATENCY
+};
+
+#define DEFAULT_FRAGSIZE_MSEC 25
+
+#endif
+
+#ifdef TUNNEL_SINK
+static void command_request(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
+static void command_started(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
+#endif
+static void command_subscribe_event(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
+static void command_stream_killed(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
+static void command_overflow_or_underflow(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
+static void command_suspended(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
+static void command_moved(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
+static void command_stream_or_client_event(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
+static void command_stream_buffer_attr_changed(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
+
+static const pa_pdispatch_cb_t command_table[PA_COMMAND_MAX] = {
+#ifdef TUNNEL_SINK
+    [PA_COMMAND_REQUEST] = command_request,
+    [PA_COMMAND_STARTED] = command_started,
+#endif
+    [PA_COMMAND_SUBSCRIBE_EVENT] = command_subscribe_event,
+    [PA_COMMAND_OVERFLOW] = command_overflow_or_underflow,
+    [PA_COMMAND_UNDERFLOW] = command_overflow_or_underflow,
+    [PA_COMMAND_PLAYBACK_STREAM_KILLED] = command_stream_killed,
+    [PA_COMMAND_RECORD_STREAM_KILLED] = command_stream_killed,
+    [PA_COMMAND_PLAYBACK_STREAM_SUSPENDED] = command_suspended,
+    [PA_COMMAND_RECORD_STREAM_SUSPENDED] = command_suspended,
+    [PA_COMMAND_PLAYBACK_STREAM_MOVED] = command_moved,
+    [PA_COMMAND_RECORD_STREAM_MOVED] = command_moved,
+    [PA_COMMAND_PLAYBACK_STREAM_EVENT] = command_stream_or_client_event,
+    [PA_COMMAND_RECORD_STREAM_EVENT] = command_stream_or_client_event,
+    [PA_COMMAND_CLIENT_EVENT] = command_stream_or_client_event,
+    [PA_COMMAND_PLAYBACK_BUFFER_ATTR_CHANGED] = command_stream_buffer_attr_changed,
+    [PA_COMMAND_RECORD_BUFFER_ATTR_CHANGED] = command_stream_buffer_attr_changed
+};
+
+struct userdata {
+    pa_core *core;
+    pa_module *module;
+
+    pa_thread_mq thread_mq;
+    pa_rtpoll *rtpoll;
+    pa_thread *thread;
+
+    pa_socket_client *client;
+    pa_pstream *pstream;
+    pa_pdispatch *pdispatch;
+
+    char *server_name;
+#ifdef TUNNEL_SINK
+    char *sink_name;
+    pa_sink *sink;
+    size_t requested_bytes;
+#else
+    char *source_name;
+    pa_source *source;
+    pa_mcalign *mcalign;
+#endif
+
+    pa_auth_cookie *auth_cookie;
+
+    uint32_t version;
+    uint32_t ctag;
+    uint32_t device_index;
+    uint32_t channel;
+
+    int64_t counter, counter_delta;
+
+    bool remote_corked:1;
+    bool remote_suspended:1;
+
+    pa_usec_t transport_usec; /* maintained in the main thread */
+    pa_usec_t thread_transport_usec; /* maintained in the IO thread */
+
+    uint32_t ignore_latency_before;
+
+    pa_time_event *time_event;
+
+    pa_smoother *smoother;
+
+    char *device_description;
+    char *server_fqdn;
+    char *user_name;
+
+    uint32_t maxlength;
+#ifdef TUNNEL_SINK
+    uint32_t tlength;
+    uint32_t minreq;
+    uint32_t prebuf;
+#else
+    uint32_t fragsize;
+#endif
+};
+
+static void request_latency(struct userdata *u);
+
+/* Called from main context */
+static void command_stream_or_client_event(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
+    pa_log_debug("Got stream or client event.");
+}
+
+/* Called from main context */
+static void command_stream_killed(pa_pdispatch *pd,  uint32_t command,  uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+
+    pa_assert(pd);
+    pa_assert(t);
+    pa_assert(u);
+    pa_assert(u->pdispatch == pd);
+
+    pa_log_warn("Stream killed");
+    pa_module_unload_request(u->module, true);
+}
+
+/* Called from main context */
+static void command_overflow_or_underflow(pa_pdispatch *pd,  uint32_t command,  uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+
+    pa_assert(pd);
+    pa_assert(t);
+    pa_assert(u);
+    pa_assert(u->pdispatch == pd);
+
+    pa_log_info("Server signalled buffer overrun/underrun.");
+    request_latency(u);
+}
+
+/* Called from main context */
+static void command_suspended(pa_pdispatch *pd,  uint32_t command,  uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+    uint32_t channel;
+    bool suspended;
+
+    pa_assert(pd);
+    pa_assert(t);
+    pa_assert(u);
+    pa_assert(u->pdispatch == pd);
+
+    if (pa_tagstruct_getu32(t, &channel) < 0 ||
+        pa_tagstruct_get_boolean(t, &suspended) < 0 ||
+        !pa_tagstruct_eof(t)) {
+
+        pa_log("Invalid packet.");
+        pa_module_unload_request(u->module, true);
+        return;
+    }
+
+    pa_log_debug("Server reports device suspend.");
+
+#ifdef TUNNEL_SINK
+    pa_asyncmsgq_send(u->sink->asyncmsgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_REMOTE_SUSPEND, PA_UINT32_TO_PTR(suspended), 0, NULL);
+#else
+    pa_asyncmsgq_send(u->source->asyncmsgq, PA_MSGOBJECT(u->source), SOURCE_MESSAGE_REMOTE_SUSPEND, PA_UINT32_TO_PTR(suspended), 0, NULL);
+#endif
+
+    request_latency(u);
+}
+
+/* Called from main context */
+static void command_moved(pa_pdispatch *pd,  uint32_t command,  uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+    uint32_t channel, di;
+    const char *dn;
+    bool suspended;
+
+    pa_assert(pd);
+    pa_assert(t);
+    pa_assert(u);
+    pa_assert(u->pdispatch == pd);
+
+    if (pa_tagstruct_getu32(t, &channel) < 0 ||
+        pa_tagstruct_getu32(t, &di) < 0 ||
+        pa_tagstruct_gets(t, &dn) < 0 ||
+        pa_tagstruct_get_boolean(t, &suspended) < 0) {
+
+        pa_log_error("Invalid packet.");
+        pa_module_unload_request(u->module, true);
+        return;
+    }
+
+    pa_log_debug("Server reports a stream move.");
+
+#ifdef TUNNEL_SINK
+    pa_asyncmsgq_send(u->sink->asyncmsgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_REMOTE_SUSPEND, PA_UINT32_TO_PTR(suspended), 0, NULL);
+#else
+    pa_asyncmsgq_send(u->source->asyncmsgq, PA_MSGOBJECT(u->source), SOURCE_MESSAGE_REMOTE_SUSPEND, PA_UINT32_TO_PTR(suspended), 0, NULL);
+#endif
+
+    request_latency(u);
+}
+
+static void command_stream_buffer_attr_changed(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+    uint32_t channel, maxlength, tlength = 0, fragsize, prebuf, minreq;
+    pa_usec_t usec;
+
+    pa_assert(pd);
+    pa_assert(t);
+    pa_assert(u);
+    pa_assert(u->pdispatch == pd);
+
+    if (pa_tagstruct_getu32(t, &channel) < 0 ||
+        pa_tagstruct_getu32(t, &maxlength) < 0) {
+
+        pa_log_error("Invalid packet.");
+        pa_module_unload_request(u->module, true);
+        return;
+    }
+
+    if (command == PA_COMMAND_RECORD_BUFFER_ATTR_CHANGED) {
+        if (pa_tagstruct_getu32(t, &fragsize) < 0 ||
+            pa_tagstruct_get_usec(t, &usec) < 0) {
+
+            pa_log_error("Invalid packet.");
+            pa_module_unload_request(u->module, true);
+            return;
+        }
+    } else {
+        if (pa_tagstruct_getu32(t, &tlength) < 0 ||
+            pa_tagstruct_getu32(t, &prebuf) < 0 ||
+            pa_tagstruct_getu32(t, &minreq) < 0 ||
+            pa_tagstruct_get_usec(t, &usec) < 0) {
+
+            pa_log_error("Invalid packet.");
+            pa_module_unload_request(u->module, true);
+            return;
+        }
+    }
+
+#ifdef TUNNEL_SINK
+    pa_log_debug("Server reports buffer attrs changed. tlength now at %lu, before %lu.", (unsigned long) tlength, (unsigned long) u->tlength);
+#endif
+
+    request_latency(u);
+}
+
+#ifdef TUNNEL_SINK
+
+/* Called from main context */
+static void command_started(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+
+    pa_assert(pd);
+    pa_assert(t);
+    pa_assert(u);
+    pa_assert(u->pdispatch == pd);
+
+    pa_log_debug("Server reports playback started.");
+    request_latency(u);
+}
+
+#endif
+
+/* Called from IO thread context */
+static void check_smoother_status(struct userdata *u, bool past) {
+    pa_usec_t x;
+
+    pa_assert(u);
+
+    x = pa_rtclock_now();
+
+    /* Correct by the time the requested issued needs to travel to the
+     * other side.  This is a valid thread-safe access, because the
+     * main thread is waiting for us */
+
+    if (past)
+        x -= u->thread_transport_usec;
+    else
+        x += u->thread_transport_usec;
+
+    if (u->remote_suspended || u->remote_corked)
+        pa_smoother_pause(u->smoother, x);
+    else
+        pa_smoother_resume(u->smoother, x, true);
+}
+
+/* Called from IO thread context */
+static void stream_cork_within_thread(struct userdata *u, bool cork) {
+    pa_assert(u);
+
+    if (u->remote_corked == cork)
+        return;
+
+    u->remote_corked = cork;
+    check_smoother_status(u, false);
+}
+
+/* Called from main context */
+static void stream_cork(struct userdata *u, bool cork) {
+    pa_tagstruct *t;
+    pa_assert(u);
+
+    if (!u->pstream)
+        return;
+
+    t = pa_tagstruct_new();
+#ifdef TUNNEL_SINK
+    pa_tagstruct_putu32(t, PA_COMMAND_CORK_PLAYBACK_STREAM);
+#else
+    pa_tagstruct_putu32(t, PA_COMMAND_CORK_RECORD_STREAM);
+#endif
+    pa_tagstruct_putu32(t, u->ctag++);
+    pa_tagstruct_putu32(t, u->channel);
+    pa_tagstruct_put_boolean(t, cork);
+    pa_pstream_send_tagstruct(u->pstream, t);
+
+    request_latency(u);
+}
+
+/* Called from IO thread context */
+static void stream_suspend_within_thread(struct userdata *u, bool suspend) {
+    pa_assert(u);
+
+    if (u->remote_suspended == suspend)
+        return;
+
+    u->remote_suspended = suspend;
+    check_smoother_status(u, true);
+}
+
+#ifdef TUNNEL_SINK
+
+/* Called from IO thread context */
+static void send_data(struct userdata *u) {
+    pa_assert(u);
+
+    while (u->requested_bytes > 0) {
+        pa_memchunk memchunk;
+
+        pa_sink_render(u->sink, u->requested_bytes, &memchunk);
+        pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_POST, NULL, 0, &memchunk, NULL);
+        pa_memblock_unref(memchunk.memblock);
+
+        u->requested_bytes -= memchunk.length;
+
+        u->counter += (int64_t) memchunk.length;
+    }
+}
+
+/* This function is called from IO context -- except when it is not. */
+static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
+    struct userdata *u = PA_SINK(o)->userdata;
+
+    switch (code) {
+
+        case PA_SINK_MESSAGE_SET_STATE: {
+            int r;
+
+            /* First, change the state, because otherwise pa_sink_render() would fail */
+            if ((r = pa_sink_process_msg(o, code, data, offset, chunk)) >= 0) {
+
+                stream_cork_within_thread(u, u->sink->thread_info.state == PA_SINK_SUSPENDED);
+
+                if (PA_SINK_IS_OPENED(u->sink->thread_info.state))
+                    send_data(u);
+            }
+
+            return r;
+        }
+
+        case PA_SINK_MESSAGE_GET_LATENCY: {
+            pa_usec_t yl, yr;
+            int64_t *usec = data;
+
+            yl = pa_bytes_to_usec((uint64_t) u->counter, &u->sink->sample_spec);
+            yr = pa_smoother_get(u->smoother, pa_rtclock_now());
+
+            *usec = (int64_t)yl - yr;
+            return 0;
+        }
+
+        case SINK_MESSAGE_REQUEST:
+
+            pa_assert(offset > 0);
+            u->requested_bytes += (size_t) offset;
+
+            if (PA_SINK_IS_OPENED(u->sink->thread_info.state))
+                send_data(u);
+
+            return 0;
+
+        case SINK_MESSAGE_REMOTE_SUSPEND:
+
+            stream_suspend_within_thread(u, !!PA_PTR_TO_UINT(data));
+            return 0;
+
+        case SINK_MESSAGE_UPDATE_LATENCY: {
+            pa_usec_t y;
+
+            y = pa_bytes_to_usec((uint64_t) u->counter, &u->sink->sample_spec);
+
+            if (y > (pa_usec_t) offset)
+                y -= (pa_usec_t) offset;
+            else
+                y = 0;
+
+            pa_smoother_put(u->smoother, pa_rtclock_now(), y);
+
+            /* We can access this freely here, since the main thread is waiting for us */
+            u->thread_transport_usec = u->transport_usec;
+
+            return 0;
+        }
+
+        case SINK_MESSAGE_POST:
+
+            /* OK, This might be a bit confusing. This message is
+             * delivered to us from the main context -- NOT from the
+             * IO thread context where the rest of the messages are
+             * dispatched. Yeah, ugly, but I am a lazy bastard. */
+
+            pa_pstream_send_memblock(u->pstream, u->channel, 0, PA_SEEK_RELATIVE, chunk);
+
+            u->counter_delta += (int64_t) chunk->length;
+
+            return 0;
+    }
+
+    return pa_sink_process_msg(o, code, data, offset, chunk);
+}
+
+/* Called from main context */
+static int sink_set_state_in_main_thread_cb(pa_sink *s, pa_sink_state_t state, pa_suspend_cause_t suspend_cause) {
+    struct userdata *u;
+    pa_sink_assert_ref(s);
+    u = s->userdata;
+
+    /* It may be that only the suspend cause is changing, in which
+     * case there's nothing to do. */
+    if (state == s->state)
+        return 0;
+
+    switch ((pa_sink_state_t) state) {
+
+        case PA_SINK_SUSPENDED:
+            pa_assert(PA_SINK_IS_OPENED(s->state));
+            stream_cork(u, true);
+            break;
+
+        case PA_SINK_IDLE:
+        case PA_SINK_RUNNING:
+            if (s->state == PA_SINK_SUSPENDED)
+                stream_cork(u, false);
+            break;
+
+        case PA_SINK_UNLINKED:
+        case PA_SINK_INIT:
+        case PA_SINK_INVALID_STATE:
+            ;
+    }
+
+    return 0;
+}
+
+#else
+
+/* This function is called from IO context -- except when it is not. */
+static int source_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
+    struct userdata *u = PA_SOURCE(o)->userdata;
+
+    switch (code) {
+
+        case PA_SOURCE_MESSAGE_SET_STATE: {
+            int r;
+
+            if ((r = pa_source_process_msg(o, code, data, offset, chunk)) >= 0)
+                stream_cork_within_thread(u, u->source->thread_info.state == PA_SOURCE_SUSPENDED);
+
+            return r;
+        }
+
+        case PA_SOURCE_MESSAGE_GET_LATENCY: {
+            pa_usec_t yr, yl;
+            int64_t *usec = data;
+
+            yl = pa_bytes_to_usec((uint64_t) u->counter, &PA_SOURCE(o)->sample_spec);
+            yr = pa_smoother_get(u->smoother, pa_rtclock_now());
+
+            *usec = (int64_t)yr - yl;
+            return 0;
+        }
+
+        case SOURCE_MESSAGE_POST: {
+            pa_memchunk c;
+
+            pa_mcalign_push(u->mcalign, chunk);
+
+            while (pa_mcalign_pop(u->mcalign, &c) >= 0) {
+
+                if (PA_SOURCE_IS_OPENED(u->source->thread_info.state))
+                    pa_source_post(u->source, &c);
+
+                pa_memblock_unref(c.memblock);
+
+                u->counter += (int64_t) c.length;
+            }
+
+            return 0;
+        }
+
+        case SOURCE_MESSAGE_REMOTE_SUSPEND:
+
+            stream_suspend_within_thread(u, !!PA_PTR_TO_UINT(data));
+            return 0;
+
+        case SOURCE_MESSAGE_UPDATE_LATENCY: {
+            pa_usec_t y;
+
+            y = pa_bytes_to_usec((uint64_t) u->counter, &u->source->sample_spec);
+            y += (pa_usec_t) offset;
+
+            pa_smoother_put(u->smoother, pa_rtclock_now(), y);
+
+            /* We can access this freely here, since the main thread is waiting for us */
+            u->thread_transport_usec = u->transport_usec;
+
+            return 0;
+        }
+    }
+
+    return pa_source_process_msg(o, code, data, offset, chunk);
+}
+
+/* Called from main context */
+static int source_set_state_in_main_thread_cb(pa_source *s, pa_source_state_t state, pa_suspend_cause_t suspend_cause) {
+    struct userdata *u;
+    pa_source_assert_ref(s);
+    u = s->userdata;
+
+    /* It may be that only the suspend cause is changing, in which
+     * case there's nothing to do. */
+    if (state == s->state)
+        return 0;
+
+    switch ((pa_source_state_t) state) {
+
+        case PA_SOURCE_SUSPENDED:
+            pa_assert(PA_SOURCE_IS_OPENED(s->state));
+            stream_cork(u, true);
+            break;
+
+        case PA_SOURCE_IDLE:
+        case PA_SOURCE_RUNNING:
+            if (s->state == PA_SOURCE_SUSPENDED)
+                stream_cork(u, false);
+            break;
+
+        case PA_SOURCE_UNLINKED:
+        case PA_SOURCE_INIT:
+        case PA_SOURCE_INVALID_STATE:
+            ;
+    }
+
+    return 0;
+}
+
+#endif
+
+static void thread_func(void *userdata) {
+    struct userdata *u = userdata;
+
+    pa_assert(u);
+
+    pa_log_debug("Thread starting up");
+
+    pa_thread_mq_install(&u->thread_mq);
+
+    for (;;) {
+        int ret;
+
+#ifdef TUNNEL_SINK
+        if (PA_UNLIKELY(u->sink->thread_info.rewind_requested))
+            pa_sink_process_rewind(u->sink, 0);
+#endif
+
+        if ((ret = pa_rtpoll_run(u->rtpoll)) < 0)
+            goto fail;
+
+        if (ret == 0)
+            goto finish;
+    }
+
+fail:
+    /* If this was no regular exit from the loop we have to continue
+     * processing messages until we received PA_MESSAGE_SHUTDOWN */
+    pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
+    pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
+
+finish:
+    pa_log_debug("Thread shutting down");
+}
+
+#ifdef TUNNEL_SINK
+/* Called from main context */
+static void command_request(pa_pdispatch *pd, uint32_t command,  uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+    uint32_t bytes, channel;
+
+    pa_assert(pd);
+    pa_assert(command == PA_COMMAND_REQUEST);
+    pa_assert(t);
+    pa_assert(u);
+    pa_assert(u->pdispatch == pd);
+
+    if (pa_tagstruct_getu32(t, &channel) < 0 ||
+        pa_tagstruct_getu32(t, &bytes) < 0) {
+        pa_log("Invalid protocol reply");
+        goto fail;
+    }
+
+    if (channel != u->channel) {
+        pa_log("Received data for invalid channel");
+        goto fail;
+    }
+
+    pa_asyncmsgq_post(u->sink->asyncmsgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_REQUEST, NULL, bytes, NULL, NULL);
+    return;
+
+fail:
+    pa_module_unload_request(u->module, true);
+}
+
+#endif
+
+/* Called from main context */
+static void stream_get_latency_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+    pa_usec_t sink_usec, source_usec;
+    bool playing;
+    int64_t write_index, read_index;
+    struct timeval local, remote, now;
+    pa_sample_spec *ss;
+    int64_t delay;
+
+    pa_assert(pd);
+    pa_assert(u);
+
+    if (command != PA_COMMAND_REPLY) {
+        if (command == PA_COMMAND_ERROR)
+            pa_log("Failed to get latency.");
+        else
+            pa_log("Protocol error.");
+        goto fail;
+    }
+
+    if (pa_tagstruct_get_usec(t, &sink_usec) < 0 ||
+        pa_tagstruct_get_usec(t, &source_usec) < 0 ||
+        pa_tagstruct_get_boolean(t, &playing) < 0 ||
+        pa_tagstruct_get_timeval(t, &local) < 0 ||
+        pa_tagstruct_get_timeval(t, &remote) < 0 ||
+        pa_tagstruct_gets64(t, &write_index) < 0 ||
+        pa_tagstruct_gets64(t, &read_index) < 0) {
+        pa_log("Invalid reply.");
+        goto fail;
+    }
+
+#ifdef TUNNEL_SINK
+    if (u->version >= 13) {
+        uint64_t underrun_for = 0, playing_for = 0;
+
+        if (pa_tagstruct_getu64(t, &underrun_for) < 0 ||
+            pa_tagstruct_getu64(t, &playing_for) < 0) {
+            pa_log("Invalid reply.");
+            goto fail;
+        }
+    }
+#endif
+
+    if (!pa_tagstruct_eof(t)) {
+        pa_log("Invalid reply.");
+        goto fail;
+    }
+
+    if (tag < u->ignore_latency_before) {
+        return;
+    }
+
+    pa_gettimeofday(&now);
+
+    /* Calculate transport usec */
+    if (pa_timeval_cmp(&local, &remote) < 0 && pa_timeval_cmp(&remote, &now)) {
+        /* local and remote seem to have synchronized clocks */
+#ifdef TUNNEL_SINK
+        u->transport_usec = pa_timeval_diff(&remote, &local);
+#else
+        u->transport_usec = pa_timeval_diff(&now, &remote);
+#endif
+    } else
+        u->transport_usec = pa_timeval_diff(&now, &local)/2;
+
+    /* First, take the device's delay */
+#ifdef TUNNEL_SINK
+    delay = (int64_t) sink_usec;
+    ss = &u->sink->sample_spec;
+#else
+    delay = (int64_t) source_usec;
+    ss = &u->source->sample_spec;
+#endif
+
+    /* Add the length of our server-side buffer */
+    if (write_index >= read_index)
+        delay += (int64_t) pa_bytes_to_usec((uint64_t) (write_index-read_index), ss);
+    else
+        delay -= (int64_t) pa_bytes_to_usec((uint64_t) (read_index-write_index), ss);
+
+    /* Our measurements are already out of date, hence correct by the     *
+     * transport latency */
+#ifdef TUNNEL_SINK
+    delay -= (int64_t) u->transport_usec;
+#else
+    delay += (int64_t) u->transport_usec;
+#endif
+
+    /* Now correct by what we have have read/written since we requested the update */
+#ifdef TUNNEL_SINK
+    delay += (int64_t) pa_bytes_to_usec((uint64_t) u->counter_delta, ss);
+#else
+    delay -= (int64_t) pa_bytes_to_usec((uint64_t) u->counter_delta, ss);
+#endif
+
+#ifdef TUNNEL_SINK
+    pa_asyncmsgq_send(u->sink->asyncmsgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_UPDATE_LATENCY, 0, delay, NULL);
+#else
+    pa_asyncmsgq_send(u->source->asyncmsgq, PA_MSGOBJECT(u->source), SOURCE_MESSAGE_UPDATE_LATENCY, 0, delay, NULL);
+#endif
+
+    return;
+
+fail:
+
+    pa_module_unload_request(u->module, true);
+}
+
+/* Called from main context */
+static void request_latency(struct userdata *u) {
+    pa_tagstruct *t;
+    struct timeval now;
+    uint32_t tag;
+    pa_assert(u);
+
+    t = pa_tagstruct_new();
+#ifdef TUNNEL_SINK
+    pa_tagstruct_putu32(t, PA_COMMAND_GET_PLAYBACK_LATENCY);
+#else
+    pa_tagstruct_putu32(t, PA_COMMAND_GET_RECORD_LATENCY);
+#endif
+    pa_tagstruct_putu32(t, tag = u->ctag++);
+    pa_tagstruct_putu32(t, u->channel);
+
+    pa_tagstruct_put_timeval(t, pa_gettimeofday(&now));
+
+    pa_pstream_send_tagstruct(u->pstream, t);
+    pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, stream_get_latency_callback, u, NULL);
+
+    u->ignore_latency_before = tag;
+    u->counter_delta = 0;
+}
+
+/* Called from main context */
+static void timeout_callback(pa_mainloop_api *m, pa_time_event *e, const struct timeval *t, void *userdata) {
+    struct userdata *u = userdata;
+
+    pa_assert(m);
+    pa_assert(e);
+    pa_assert(u);
+
+    request_latency(u);
+
+    pa_core_rttime_restart(u->core, e, pa_rtclock_now() + LATENCY_INTERVAL);
+}
+
+/* Called from main context */
+static void update_description(struct userdata *u) {
+    char *d;
+    char un[128], hn[128];
+    pa_tagstruct *t;
+
+    pa_assert(u);
+
+    if (!u->server_fqdn || !u->user_name || !u->device_description)
+        return;
+
+    d = pa_sprintf_malloc("%s on %s@%s", u->device_description, u->user_name, u->server_fqdn);
+
+#ifdef TUNNEL_SINK
+    pa_sink_set_description(u->sink, d);
+    pa_proplist_sets(u->sink->proplist, "tunnel.remote.user", u->user_name);
+    pa_proplist_sets(u->sink->proplist, "tunnel.remote.fqdn", u->server_fqdn);
+    pa_proplist_sets(u->sink->proplist, "tunnel.remote.description", u->device_description);
+#else
+    pa_source_set_description(u->source, d);
+    pa_proplist_sets(u->source->proplist, "tunnel.remote.user", u->user_name);
+    pa_proplist_sets(u->source->proplist, "tunnel.remote.fqdn", u->server_fqdn);
+    pa_proplist_sets(u->source->proplist, "tunnel.remote.description", u->device_description);
+#endif
+
+    pa_xfree(d);
+
+    d = pa_sprintf_malloc("%s for %s@%s", u->device_description,
+                          pa_get_user_name(un, sizeof(un)),
+                          pa_get_host_name(hn, sizeof(hn)));
+
+    t = pa_tagstruct_new();
+#ifdef TUNNEL_SINK
+    pa_tagstruct_putu32(t, PA_COMMAND_SET_PLAYBACK_STREAM_NAME);
+#else
+    pa_tagstruct_putu32(t, PA_COMMAND_SET_RECORD_STREAM_NAME);
+#endif
+    pa_tagstruct_putu32(t, u->ctag++);
+    pa_tagstruct_putu32(t, u->channel);
+    pa_tagstruct_puts(t, d);
+    pa_pstream_send_tagstruct(u->pstream, t);
+
+    pa_xfree(d);
+}
+
+/* Called from main context */
+static void server_info_cb(pa_pdispatch *pd, uint32_t command,  uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+    pa_sample_spec ss;
+    pa_channel_map cm;
+    const char *server_name, *server_version, *user_name, *host_name, *default_sink_name, *default_source_name;
+    uint32_t cookie;
+
+    pa_assert(pd);
+    pa_assert(u);
+
+    if (command != PA_COMMAND_REPLY) {
+        if (command == PA_COMMAND_ERROR)
+            pa_log("Failed to get info.");
+        else
+            pa_log("Protocol error.");
+        goto fail;
+    }
+
+    if (pa_tagstruct_gets(t, &server_name) < 0 ||
+        pa_tagstruct_gets(t, &server_version) < 0 ||
+        pa_tagstruct_gets(t, &user_name) < 0 ||
+        pa_tagstruct_gets(t, &host_name) < 0 ||
+        pa_tagstruct_get_sample_spec(t, &ss) < 0 ||
+        pa_tagstruct_gets(t, &default_sink_name) < 0 ||
+        pa_tagstruct_gets(t, &default_source_name) < 0 ||
+        pa_tagstruct_getu32(t, &cookie) < 0 ||
+        (u->version >= 15 && pa_tagstruct_get_channel_map(t, &cm) < 0)) {
+
+        pa_log("Parse failure");
+        goto fail;
+    }
+
+    if (!pa_tagstruct_eof(t)) {
+        pa_log("Packet too long");
+        goto fail;
+    }
+
+    pa_xfree(u->server_fqdn);
+    u->server_fqdn = pa_xstrdup(host_name);
+
+    pa_xfree(u->user_name);
+    u->user_name = pa_xstrdup(user_name);
+
+    update_description(u);
+
+    return;
+
+fail:
+    pa_module_unload_request(u->module, true);
+}
+
+static int read_ports(struct userdata *u, pa_tagstruct *t) {
+    if (u->version >= 16) {
+        uint32_t n_ports;
+        const char *s;
+
+        if (pa_tagstruct_getu32(t, &n_ports)) {
+            pa_log("Parse failure");
+            return -PA_ERR_PROTOCOL;
+        }
+
+        for (uint32_t j = 0; j < n_ports; j++) {
+            uint32_t priority;
+
+            if (pa_tagstruct_gets(t, &s) < 0 || /* name */
+                pa_tagstruct_gets(t, &s) < 0 || /* description */
+                pa_tagstruct_getu32(t, &priority) < 0) {
+
+                pa_log("Parse failure");
+                return -PA_ERR_PROTOCOL;
+            }
+            if (u->version >= 24) {
+                if (pa_tagstruct_getu32(t, &priority) < 0) { /* available */
+                    pa_log("Parse failure");
+                    return -PA_ERR_PROTOCOL;
+                }
+                if (u->version >= 34 &&
+                    (pa_tagstruct_gets(t, &s) < 0 || /* availability group */
+                     pa_tagstruct_getu32(t, &priority) < 0)) { /* device port type */
+                    pa_log("Parse failure");
+                    return -PA_ERR_PROTOCOL;
+                }
+            }
+        }
+
+        if (pa_tagstruct_gets(t, &s) < 0) { /* active port */
+            pa_log("Parse failure");
+            return -PA_ERR_PROTOCOL;
+        }
+    }
+    return 0;
+}
+
+static int read_formats(struct userdata *u, pa_tagstruct *t) {
+    uint8_t n_formats;
+    pa_format_info *format;
+
+    if (pa_tagstruct_getu8(t, &n_formats) < 0) { /* no. of formats */
+        pa_log("Parse failure");
+        return -PA_ERR_PROTOCOL;
+    }
+
+    for (uint8_t j = 0; j < n_formats; j++) {
+        format = pa_format_info_new();
+        if (pa_tagstruct_get_format_info(t, format)) { /* format info */
+            pa_format_info_free(format);
+            pa_log("Parse failure");
+            return -PA_ERR_PROTOCOL;
+        }
+        pa_format_info_free(format);
+    }
+    return 0;
+}
+
+#ifdef TUNNEL_SINK
+
+/* Called from main context */
+static void sink_info_cb(pa_pdispatch *pd, uint32_t command,  uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+    uint32_t idx, owner_module, monitor_source, flags;
+    const char *name, *description, *monitor_source_name, *driver;
+    pa_sample_spec ss;
+    pa_channel_map cm;
+    pa_cvolume volume;
+    bool mute;
+    pa_usec_t latency;
+
+    pa_assert(pd);
+    pa_assert(u);
+
+    if (command != PA_COMMAND_REPLY) {
+        if (command == PA_COMMAND_ERROR)
+            pa_log("Failed to get info.");
+        else
+            pa_log("Protocol error.");
+        goto fail;
+    }
+
+    if (pa_tagstruct_getu32(t, &idx) < 0 ||
+        pa_tagstruct_gets(t, &name) < 0 ||
+        pa_tagstruct_gets(t, &description) < 0 ||
+        pa_tagstruct_get_sample_spec(t, &ss) < 0 ||
+        pa_tagstruct_get_channel_map(t, &cm) < 0 ||
+        pa_tagstruct_getu32(t, &owner_module) < 0 ||
+        pa_tagstruct_get_cvolume(t, &volume) < 0 ||
+        pa_tagstruct_get_boolean(t, &mute) < 0 ||
+        pa_tagstruct_getu32(t, &monitor_source) < 0 ||
+        pa_tagstruct_gets(t, &monitor_source_name) < 0 ||
+        pa_tagstruct_get_usec(t, &latency) < 0 ||
+        pa_tagstruct_gets(t, &driver) < 0 ||
+        pa_tagstruct_getu32(t, &flags) < 0) {
+
+        pa_log("Parse failure");
+        goto fail;
+    }
+
+    if (u->version >= 13) {
+        pa_usec_t configured_latency;
+
+        if (pa_tagstruct_get_proplist(t, NULL) < 0 ||
+            pa_tagstruct_get_usec(t, &configured_latency) < 0) {
+
+            pa_log("Parse failure");
+            goto fail;
+        }
+    }
+
+    if (u->version >= 15) {
+        pa_volume_t base_volume;
+        uint32_t state, n_volume_steps, card;
+
+        if (pa_tagstruct_get_volume(t, &base_volume) < 0 ||
+            pa_tagstruct_getu32(t, &state) < 0 ||
+            pa_tagstruct_getu32(t, &n_volume_steps) < 0 ||
+            pa_tagstruct_getu32(t, &card) < 0) {
+
+            pa_log("Parse failure");
+            goto fail;
+        }
+    }
+
+    if (read_ports(u, t) < 0)
+        goto fail;
+
+    if (u->version >= 21 && read_formats(u, t) < 0)
+        goto fail;
+
+    if (!pa_tagstruct_eof(t)) {
+        pa_log("Packet too long");
+        goto fail;
+    }
+
+    if (!u->sink_name || !pa_streq(name, u->sink_name))
+        return;
+
+    pa_xfree(u->device_description);
+    u->device_description = pa_xstrdup(description);
+
+    update_description(u);
+
+    return;
+
+fail:
+    pa_module_unload_request(u->module, true);
+}
+
+/* Called from main context */
+static void sink_input_info_cb(pa_pdispatch *pd, uint32_t command,  uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+    uint32_t idx, owner_module, client, sink;
+    pa_usec_t buffer_usec, sink_usec;
+    const char *name, *driver, *resample_method;
+    bool mute = false;
+    pa_sample_spec sample_spec;
+    pa_channel_map channel_map;
+    pa_cvolume volume;
+    bool b;
+
+    pa_assert(pd);
+    pa_assert(u);
+
+    if (command != PA_COMMAND_REPLY) {
+        if (command == PA_COMMAND_ERROR)
+            pa_log("Failed to get info.");
+        else
+            pa_log("Protocol error.");
+        goto fail;
+    }
+
+    if (pa_tagstruct_getu32(t, &idx) < 0 ||
+        pa_tagstruct_gets(t, &name) < 0 ||
+        pa_tagstruct_getu32(t, &owner_module) < 0 ||
+        pa_tagstruct_getu32(t, &client) < 0 ||
+        pa_tagstruct_getu32(t, &sink) < 0 ||
+        pa_tagstruct_get_sample_spec(t, &sample_spec) < 0 ||
+        pa_tagstruct_get_channel_map(t, &channel_map) < 0 ||
+        pa_tagstruct_get_cvolume(t, &volume) < 0 ||
+        pa_tagstruct_get_usec(t, &buffer_usec) < 0 ||
+        pa_tagstruct_get_usec(t, &sink_usec) < 0 ||
+        pa_tagstruct_gets(t, &resample_method) < 0 ||
+        pa_tagstruct_gets(t, &driver) < 0) {
+
+        pa_log("Parse failure");
+        goto fail;
+    }
+
+    if (u->version >= 11) {
+        if (pa_tagstruct_get_boolean(t, &mute) < 0) {
+
+            pa_log("Parse failure");
+            goto fail;
+        }
+    }
+
+    if (u->version >= 13) {
+        if (pa_tagstruct_get_proplist(t, NULL) < 0) {
+
+            pa_log("Parse failure");
+            goto fail;
+        }
+    }
+
+    if (u->version >= 19) {
+        if (pa_tagstruct_get_boolean(t, &b) < 0) {
+
+            pa_log("Parse failure");
+            goto fail;
+        }
+    }
+
+    if (u->version >= 20) {
+        if (pa_tagstruct_get_boolean(t, &b) < 0 ||
+            pa_tagstruct_get_boolean(t, &b) < 0) {
+
+            pa_log("Parse failure");
+            goto fail;
+        }
+    }
+
+    if (u->version >= 21) {
+        pa_format_info *format = pa_format_info_new();
+
+        if (pa_tagstruct_get_format_info(t, format) < 0) {
+            pa_format_info_free(format);
+            pa_log("Parse failure");
+            goto fail;
+        }
+        pa_format_info_free(format);
+    }
+
+    if (!pa_tagstruct_eof(t)) {
+        pa_log("Packet too long");
+        goto fail;
+    }
+
+    if (idx != u->device_index)
+        return;
+
+    pa_assert(u->sink);
+
+    if ((u->version < 11 || mute == u->sink->muted) &&
+        pa_cvolume_equal(&volume, &u->sink->real_volume))
+        return;
+
+    pa_sink_volume_changed(u->sink, &volume);
+
+    if (u->version >= 11)
+        pa_sink_mute_changed(u->sink, mute);
+
+    return;
+
+fail:
+    pa_module_unload_request(u->module, true);
+}
+
+#else
+
+/* Called from main context */
+static void source_info_cb(pa_pdispatch *pd, uint32_t command,  uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+    uint32_t idx, owner_module, monitor_of_sink, flags;
+    const char *name, *description, *monitor_of_sink_name, *driver;
+    pa_sample_spec ss;
+    pa_channel_map cm;
+    pa_cvolume volume;
+    bool mute;
+    pa_usec_t latency, configured_latency;
+
+    pa_assert(pd);
+    pa_assert(u);
+
+    if (command != PA_COMMAND_REPLY) {
+        if (command == PA_COMMAND_ERROR)
+            pa_log("Failed to get info.");
+        else
+            pa_log("Protocol error.");
+        goto fail;
+    }
+
+    if (pa_tagstruct_getu32(t, &idx) < 0 ||
+        pa_tagstruct_gets(t, &name) < 0 ||
+        pa_tagstruct_gets(t, &description) < 0 ||
+        pa_tagstruct_get_sample_spec(t, &ss) < 0 ||
+        pa_tagstruct_get_channel_map(t, &cm) < 0 ||
+        pa_tagstruct_getu32(t, &owner_module) < 0 ||
+        pa_tagstruct_get_cvolume(t, &volume) < 0 ||
+        pa_tagstruct_get_boolean(t, &mute) < 0 ||
+        pa_tagstruct_getu32(t, &monitor_of_sink) < 0 ||
+        pa_tagstruct_gets(t, &monitor_of_sink_name) < 0 ||
+        pa_tagstruct_get_usec(t, &latency) < 0 ||
+        pa_tagstruct_gets(t, &driver) < 0 ||
+        pa_tagstruct_getu32(t, &flags) < 0) {
+
+        pa_log("Parse failure");
+        goto fail;
+    }
+
+    if (u->version >= 13) {
+        if (pa_tagstruct_get_proplist(t, NULL) < 0 ||
+            pa_tagstruct_get_usec(t, &configured_latency) < 0) {
+
+            pa_log("Parse failure");
+            goto fail;
+        }
+    }
+
+    if (u->version >= 15) {
+        pa_volume_t base_volume;
+        uint32_t state, n_volume_steps, card;
+
+        if (pa_tagstruct_get_volume(t, &base_volume) < 0 ||
+            pa_tagstruct_getu32(t, &state) < 0 ||
+            pa_tagstruct_getu32(t, &n_volume_steps) < 0 ||
+            pa_tagstruct_getu32(t, &card) < 0) {
+
+            pa_log("Parse failure");
+            goto fail;
+        }
+    }
+
+    if (read_ports(u, t) < 0)
+        goto fail;
+
+    if (u->version >= 22 && read_formats(u, t) < 0)
+        goto fail;
+
+    if (!pa_tagstruct_eof(t)) {
+        pa_log("Packet too long");
+        goto fail;
+    }
+
+    if (!u->source_name || !pa_streq(name, u->source_name))
+        return;
+
+    pa_xfree(u->device_description);
+    u->device_description = pa_xstrdup(description);
+
+    update_description(u);
+
+    return;
+
+fail:
+    pa_module_unload_request(u->module, true);
+}
+
+#endif
+
+/* Called from main context */
+static void request_info(struct userdata *u) {
+    pa_tagstruct *t;
+    uint32_t tag;
+    pa_assert(u);
+
+    t = pa_tagstruct_new();
+    pa_tagstruct_putu32(t, PA_COMMAND_GET_SERVER_INFO);
+    pa_tagstruct_putu32(t, tag = u->ctag++);
+    pa_pstream_send_tagstruct(u->pstream, t);
+    pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, server_info_cb, u, NULL);
+
+#ifdef TUNNEL_SINK
+    t = pa_tagstruct_new();
+    pa_tagstruct_putu32(t, PA_COMMAND_GET_SINK_INPUT_INFO);
+    pa_tagstruct_putu32(t, tag = u->ctag++);
+    pa_tagstruct_putu32(t, u->device_index);
+    pa_pstream_send_tagstruct(u->pstream, t);
+    pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, sink_input_info_cb, u, NULL);
+
+    if (u->sink_name) {
+        t = pa_tagstruct_new();
+        pa_tagstruct_putu32(t, PA_COMMAND_GET_SINK_INFO);
+        pa_tagstruct_putu32(t, tag = u->ctag++);
+        pa_tagstruct_putu32(t, PA_INVALID_INDEX);
+        pa_tagstruct_puts(t, u->sink_name);
+        pa_pstream_send_tagstruct(u->pstream, t);
+        pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, sink_info_cb, u, NULL);
+    }
+#else
+    if (u->source_name) {
+        t = pa_tagstruct_new();
+        pa_tagstruct_putu32(t, PA_COMMAND_GET_SOURCE_INFO);
+        pa_tagstruct_putu32(t, tag = u->ctag++);
+        pa_tagstruct_putu32(t, PA_INVALID_INDEX);
+        pa_tagstruct_puts(t, u->source_name);
+        pa_pstream_send_tagstruct(u->pstream, t);
+        pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, source_info_cb, u, NULL);
+    }
+#endif
+}
+
+/* Called from main context */
+static void command_subscribe_event(pa_pdispatch *pd,  uint32_t command,  uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+    pa_subscription_event_type_t e;
+    uint32_t idx;
+
+    pa_assert(pd);
+    pa_assert(t);
+    pa_assert(u);
+    pa_assert(command == PA_COMMAND_SUBSCRIBE_EVENT);
+
+    if (pa_tagstruct_getu32(t, &e) < 0 ||
+        pa_tagstruct_getu32(t, &idx) < 0) {
+        pa_log("Invalid protocol reply");
+        pa_module_unload_request(u->module, true);
+        return;
+    }
+
+    if (e != (PA_SUBSCRIPTION_EVENT_SERVER|PA_SUBSCRIPTION_EVENT_CHANGE) &&
+#ifdef TUNNEL_SINK
+        e != (PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE) &&
+        e != (PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE)
+#else
+        e != (PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE)
+#endif
+        )
+        return;
+
+    request_info(u);
+}
+
+/* Called from main context */
+static void start_subscribe(struct userdata *u) {
+    pa_tagstruct *t;
+    pa_assert(u);
+
+    t = pa_tagstruct_new();
+    pa_tagstruct_putu32(t, PA_COMMAND_SUBSCRIBE);
+    pa_tagstruct_putu32(t, u->ctag++);
+    pa_tagstruct_putu32(t, PA_SUBSCRIPTION_MASK_SERVER|
+#ifdef TUNNEL_SINK
+                        PA_SUBSCRIPTION_MASK_SINK_INPUT|PA_SUBSCRIPTION_MASK_SINK
+#else
+                        PA_SUBSCRIPTION_MASK_SOURCE
+#endif
+                        );
+
+    pa_pstream_send_tagstruct(u->pstream, t);
+}
+
+/* Called from main context */
+static void create_stream_callback(pa_pdispatch *pd, uint32_t command,  uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+#ifdef TUNNEL_SINK
+    uint32_t bytes;
+#endif
+
+    pa_assert(pd);
+    pa_assert(u);
+    pa_assert(u->pdispatch == pd);
+
+    if (command != PA_COMMAND_REPLY) {
+        if (command == PA_COMMAND_ERROR)
+            pa_log("Failed to create stream.");
+        else
+            pa_log("Protocol error.");
+        goto fail;
+    }
+
+    if (pa_tagstruct_getu32(t, &u->channel) < 0 ||
+        pa_tagstruct_getu32(t, &u->device_index) < 0
+#ifdef TUNNEL_SINK
+        || pa_tagstruct_getu32(t, &bytes) < 0
+#endif
+        )
+        goto parse_error;
+
+    if (u->version >= 9) {
+#ifdef TUNNEL_SINK
+        if (pa_tagstruct_getu32(t, &u->maxlength) < 0 ||
+            pa_tagstruct_getu32(t, &u->tlength) < 0 ||
+            pa_tagstruct_getu32(t, &u->prebuf) < 0 ||
+            pa_tagstruct_getu32(t, &u->minreq) < 0)
+            goto parse_error;
+#else
+        if (pa_tagstruct_getu32(t, &u->maxlength) < 0 ||
+            pa_tagstruct_getu32(t, &u->fragsize) < 0)
+            goto parse_error;
+#endif
+    }
+
+    if (u->version >= 12) {
+        pa_sample_spec ss;
+        pa_channel_map cm;
+        uint32_t device_index;
+        const char *dn;
+        bool suspended;
+
+        if (pa_tagstruct_get_sample_spec(t, &ss) < 0 ||
+            pa_tagstruct_get_channel_map(t, &cm) < 0 ||
+            pa_tagstruct_getu32(t, &device_index) < 0 ||
+            pa_tagstruct_gets(t, &dn) < 0 ||
+            pa_tagstruct_get_boolean(t, &suspended) < 0)
+            goto parse_error;
+
+#ifdef TUNNEL_SINK
+        pa_xfree(u->sink_name);
+        u->sink_name = pa_xstrdup(dn);
+#else
+        pa_xfree(u->source_name);
+        u->source_name = pa_xstrdup(dn);
+#endif
+    }
+
+    if (u->version >= 13) {
+        pa_usec_t usec;
+
+        if (pa_tagstruct_get_usec(t, &usec) < 0)
+            goto parse_error;
+
+/* #ifdef TUNNEL_SINK */
+/*         pa_sink_set_latency_range(u->sink, usec + MIN_NETWORK_LATENCY_USEC, 0); */
+/* #else */
+/*         pa_source_set_latency_range(u->source, usec + MIN_NETWORK_LATENCY_USEC, 0); */
+/* #endif */
+    }
+
+    if (u->version >= 21) {
+        pa_format_info *format = pa_format_info_new();
+
+        if (pa_tagstruct_get_format_info(t, format) < 0) {
+            pa_format_info_free(format);
+            goto parse_error;
+        }
+
+        pa_format_info_free(format);
+    }
+
+    if (!pa_tagstruct_eof(t))
+        goto parse_error;
+
+    start_subscribe(u);
+    request_info(u);
+
+    pa_assert(!u->time_event);
+    u->time_event = pa_core_rttime_new(u->core, pa_rtclock_now() + LATENCY_INTERVAL, timeout_callback, u);
+
+    request_latency(u);
+
+    pa_log_debug("Stream created.");
+
+#ifdef TUNNEL_SINK
+    pa_asyncmsgq_post(u->sink->asyncmsgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_REQUEST, NULL, bytes, NULL, NULL);
+#endif
+
+    return;
+
+parse_error:
+    pa_log("Invalid reply. (Create stream)");
+
+fail:
+    pa_module_unload_request(u->module, true);
+
+}
+
+/* Called from main context */
+static void setup_complete_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
+    struct userdata *u = userdata;
+    pa_tagstruct *reply;
+    char name[256], un[128], hn[128];
+    pa_cvolume volume;
+
+    pa_assert(pd);
+    pa_assert(u);
+    pa_assert(u->pdispatch == pd);
+
+    if (command != PA_COMMAND_REPLY ||
+        pa_tagstruct_getu32(t, &u->version) < 0 ||
+        !pa_tagstruct_eof(t)) {
+
+        if (command == PA_COMMAND_ERROR)
+            pa_log("Failed to authenticate");
+        else
+            pa_log("Protocol error.");
+
+        goto fail;
+    }
+
+    /* Minimum supported protocol version */
+    if (u->version < 8) {
+        pa_log("Incompatible protocol version");
+        goto fail;
+    }
+
+    /* Starting with protocol version 13 the MSB of the version tag
+    reflects if shm is enabled for this connection or not. We don't
+    support SHM here at all, so we just ignore this. */
+
+    if (u->version >= 13)
+        u->version &= 0x7FFFFFFFU;
+
+    pa_log_debug("Protocol version: remote %u, local %u", u->version, PA_PROTOCOL_VERSION);
+
+#ifdef TUNNEL_SINK
+    pa_proplist_setf(u->sink->proplist, "tunnel.remote_version", "%u", u->version);
+    pa_sink_update_proplist(u->sink, 0, NULL);
+
+    pa_snprintf(name, sizeof(name), "%s for %s@%s",
+                u->sink_name,
+                pa_get_user_name(un, sizeof(un)),
+                pa_get_host_name(hn, sizeof(hn)));
+#else
+    pa_proplist_setf(u->source->proplist, "tunnel.remote_version", "%u", u->version);
+    pa_source_update_proplist(u->source, 0, NULL);
+
+    pa_snprintf(name, sizeof(name), "%s for %s@%s",
+                u->source_name,
+                pa_get_user_name(un, sizeof(un)),
+                pa_get_host_name(hn, sizeof(hn)));
+#endif
+
+    reply = pa_tagstruct_new();
+    pa_tagstruct_putu32(reply, PA_COMMAND_SET_CLIENT_NAME);
+    pa_tagstruct_putu32(reply, u->ctag++);
+
+    if (u->version >= 13) {
+        pa_proplist *pl;
+        pl = pa_proplist_new();
+        pa_proplist_sets(pl, PA_PROP_APPLICATION_ID, "org.PulseAudio.PulseAudio");
+        pa_proplist_sets(pl, PA_PROP_APPLICATION_VERSION, PACKAGE_VERSION);
+        pa_init_proplist(pl);
+        pa_tagstruct_put_proplist(reply, pl);
+        pa_proplist_free(pl);
+    } else
+        pa_tagstruct_puts(reply, "PulseAudio");
+
+    pa_pstream_send_tagstruct(u->pstream, reply);
+    /* We ignore the server's reply here */
+
+    reply = pa_tagstruct_new();
+
+    if (u->version < 13)
+        /* Only for older PA versions we need to fill in the maxlength */
+        u->maxlength = 4*1024*1024;
+
+#ifdef TUNNEL_SINK
+    u->tlength = (uint32_t) pa_usec_to_bytes(PA_USEC_PER_MSEC * DEFAULT_TLENGTH_MSEC, &u->sink->sample_spec);
+    u->minreq = (uint32_t) pa_usec_to_bytes(PA_USEC_PER_MSEC * DEFAULT_MINREQ_MSEC, &u->sink->sample_spec);
+    u->prebuf = u->tlength;
+#else
+    u->fragsize = (uint32_t) pa_usec_to_bytes(PA_USEC_PER_MSEC * DEFAULT_FRAGSIZE_MSEC, &u->source->sample_spec);
+#endif
+
+#ifdef TUNNEL_SINK
+    pa_tagstruct_putu32(reply, PA_COMMAND_CREATE_PLAYBACK_STREAM);
+    pa_tagstruct_putu32(reply, tag = u->ctag++);
+
+    if (u->version < 13)
+        pa_tagstruct_puts(reply, name);
+
+    pa_tagstruct_put_sample_spec(reply, &u->sink->sample_spec);
+    pa_tagstruct_put_channel_map(reply, &u->sink->channel_map);
+    pa_tagstruct_putu32(reply, PA_INVALID_INDEX);
+    pa_tagstruct_puts(reply, u->sink_name);
+    pa_tagstruct_putu32(reply, u->maxlength);
+    pa_tagstruct_put_boolean(reply, !PA_SINK_IS_OPENED(u->sink->state));
+    pa_tagstruct_putu32(reply, u->tlength);
+    pa_tagstruct_putu32(reply, u->prebuf);
+    pa_tagstruct_putu32(reply, u->minreq);
+    pa_tagstruct_putu32(reply, 0);
+    pa_cvolume_reset(&volume, u->sink->sample_spec.channels);
+    pa_tagstruct_put_cvolume(reply, &volume);
+#else
+    pa_tagstruct_putu32(reply, PA_COMMAND_CREATE_RECORD_STREAM);
+    pa_tagstruct_putu32(reply, tag = u->ctag++);
+
+    if (u->version < 13)
+        pa_tagstruct_puts(reply, name);
+
+    pa_tagstruct_put_sample_spec(reply, &u->source->sample_spec);
+    pa_tagstruct_put_channel_map(reply, &u->source->channel_map);
+    pa_tagstruct_putu32(reply, PA_INVALID_INDEX);
+    pa_tagstruct_puts(reply, u->source_name);
+    pa_tagstruct_putu32(reply, u->maxlength);
+    pa_tagstruct_put_boolean(reply, !PA_SOURCE_IS_OPENED(u->source->state));
+    pa_tagstruct_putu32(reply, u->fragsize);
+#endif
+
+    if (u->version >= 12) {
+        pa_tagstruct_put_boolean(reply, false); /* no_remap */
+        pa_tagstruct_put_boolean(reply, false); /* no_remix */
+        pa_tagstruct_put_boolean(reply, false); /* fix_format */
+        pa_tagstruct_put_boolean(reply, false); /* fix_rate */
+        pa_tagstruct_put_boolean(reply, false); /* fix_channels */
+        pa_tagstruct_put_boolean(reply, true); /* no_move */
+        pa_tagstruct_put_boolean(reply, false); /* variable_rate */
+    }
+
+    if (u->version >= 13) {
+        pa_proplist *pl;
+
+        pa_tagstruct_put_boolean(reply, false); /* start muted/peak detect*/
+        pa_tagstruct_put_boolean(reply, true); /* adjust_latency */
+
+        pl = pa_proplist_new();
+        pa_proplist_sets(pl, PA_PROP_MEDIA_NAME, name);
+        pa_proplist_sets(pl, PA_PROP_MEDIA_ROLE, "abstract");
+        pa_tagstruct_put_proplist(reply, pl);
+        pa_proplist_free(pl);
+
+#ifndef TUNNEL_SINK
+        pa_tagstruct_putu32(reply, PA_INVALID_INDEX); /* direct on input */
+#endif
+    }
+
+    if (u->version >= 14) {
+#ifdef TUNNEL_SINK
+        pa_tagstruct_put_boolean(reply, false); /* volume_set */
+#endif
+        pa_tagstruct_put_boolean(reply, true); /* early rquests */
+    }
+
+    if (u->version >= 15) {
+#ifdef TUNNEL_SINK
+        pa_tagstruct_put_boolean(reply, false); /* muted_set */
+#endif
+        pa_tagstruct_put_boolean(reply, false); /* don't inhibit auto suspend */
+        pa_tagstruct_put_boolean(reply, false); /* fail on suspend */
+    }
+
+#ifdef TUNNEL_SINK
+    if (u->version >= 17)
+        pa_tagstruct_put_boolean(reply, false); /* relative volume */
+
+    if (u->version >= 18)
+        pa_tagstruct_put_boolean(reply, false); /* passthrough stream */
+#endif
+
+#ifdef TUNNEL_SINK
+    if (u->version >= 21) {
+        /* We're not using the extended API, so n_formats = 0 and that's that */
+        pa_tagstruct_putu8(reply, 0);
+    }
+#else
+    if (u->version >= 22) {
+        /* We're not using the extended API, so n_formats = 0 and that's that */
+        pa_tagstruct_putu8(reply, 0);
+        pa_cvolume_reset(&volume, u->source->sample_spec.channels);
+        pa_tagstruct_put_cvolume(reply, &volume);
+        pa_tagstruct_put_boolean(reply, false); /* muted */
+        pa_tagstruct_put_boolean(reply, false); /* volume_set */
+        pa_tagstruct_put_boolean(reply, false); /* muted_set */
+        pa_tagstruct_put_boolean(reply, false); /* relative volume */
+        pa_tagstruct_put_boolean(reply, false); /* passthrough stream */
+    }
+#endif
+
+    pa_pstream_send_tagstruct(u->pstream, reply);
+    pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, create_stream_callback, u, NULL);
+
+    pa_log_debug("Connection authenticated, creating stream ...");
+
+    return;
+
+fail:
+    pa_module_unload_request(u->module, true);
+}
+
+/* Called from main context */
+static void pstream_die_callback(pa_pstream *p, void *userdata) {
+    struct userdata *u = userdata;
+
+    pa_assert(p);
+    pa_assert(u);
+
+    pa_log_warn("Stream died.");
+    pa_module_unload_request(u->module, true);
+}
+
+/* Called from main context */
+static void pstream_packet_callback(pa_pstream *p, pa_packet *packet, pa_cmsg_ancil_data *ancil_data, void *userdata) {
+    struct userdata *u = userdata;
+
+    pa_assert(p);
+    pa_assert(packet);
+    pa_assert(u);
+
+    if (pa_pdispatch_run(u->pdispatch, packet, ancil_data, u) < 0) {
+        pa_log("Invalid packet");
+        pa_module_unload_request(u->module, true);
+        return;
+    }
+}
+
+#ifndef TUNNEL_SINK
+/* Called from main context */
+static void pstream_memblock_callback(pa_pstream *p, uint32_t channel, int64_t offset, pa_seek_mode_t seek, const pa_memchunk *chunk, void *userdata) {
+    struct userdata *u = userdata;
+
+    pa_assert(p);
+    pa_assert(chunk);
+    pa_assert(u);
+
+    if (channel != u->channel) {
+        pa_log("Received memory block on bad channel.");
+        pa_module_unload_request(u->module, true);
+        return;
+    }
+
+    pa_asyncmsgq_send(u->source->asyncmsgq, PA_MSGOBJECT(u->source), SOURCE_MESSAGE_POST, PA_UINT_TO_PTR(seek), offset, chunk);
+
+    u->counter_delta += (int64_t) chunk->length;
+}
+#endif
+
+/* Called from main context */
+static void on_connection(pa_socket_client *sc, pa_iochannel *io, void *userdata) {
+    struct userdata *u = userdata;
+    pa_tagstruct *t;
+    uint32_t tag;
+
+    pa_assert(sc);
+    pa_assert(u);
+    pa_assert(u->client == sc);
+
+    pa_socket_client_unref(u->client);
+    u->client = NULL;
+
+    if (!io) {
+        pa_log("Connection failed: %s", pa_cstrerror(errno));
+        pa_module_unload_request(u->module, true);
+        return;
+    }
+
+    u->pstream = pa_pstream_new(u->core->mainloop, io, u->core->mempool);
+    u->pdispatch = pa_pdispatch_new(u->core->mainloop, true, command_table, PA_COMMAND_MAX);
+
+    pa_pstream_set_die_callback(u->pstream, pstream_die_callback, u);
+    pa_pstream_set_receive_packet_callback(u->pstream, pstream_packet_callback, u);
+#ifndef TUNNEL_SINK
+    pa_pstream_set_receive_memblock_callback(u->pstream, pstream_memblock_callback, u);
+#endif
+
+    t = pa_tagstruct_new();
+    pa_tagstruct_putu32(t, PA_COMMAND_AUTH);
+    pa_tagstruct_putu32(t, tag = u->ctag++);
+    pa_tagstruct_putu32(t, PA_PROTOCOL_VERSION);
+
+    pa_tagstruct_put_arbitrary(t, pa_auth_cookie_read(u->auth_cookie, PA_NATIVE_COOKIE_LENGTH), PA_NATIVE_COOKIE_LENGTH);
+
+#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(u->pstream, t, &ucred);
+}
+#else
+    pa_pstream_send_tagstruct(u->pstream, t);
+#endif
+
+    pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, u, NULL);
+
+    pa_log_debug("Connection established, authenticating ...");
+}
+
+#ifdef TUNNEL_SINK
+
+/* Called from main context */
+static void sink_set_volume(pa_sink *sink) {
+    struct userdata *u;
+    pa_tagstruct *t;
+
+    pa_assert(sink);
+    u = sink->userdata;
+    pa_assert(u);
+
+    t = pa_tagstruct_new();
+    pa_tagstruct_putu32(t, PA_COMMAND_SET_SINK_INPUT_VOLUME);
+    pa_tagstruct_putu32(t, u->ctag++);
+    pa_tagstruct_putu32(t, u->device_index);
+    pa_tagstruct_put_cvolume(t, &sink->real_volume);
+    pa_pstream_send_tagstruct(u->pstream, t);
+}
+
+/* Called from main context */
+static void sink_set_mute(pa_sink *sink) {
+    struct userdata *u;
+    pa_tagstruct *t;
+
+    pa_assert(sink);
+    u = sink->userdata;
+    pa_assert(u);
+
+    if (u->version < 11)
+        return;
+
+    t = pa_tagstruct_new();
+    pa_tagstruct_putu32(t, PA_COMMAND_SET_SINK_INPUT_MUTE);
+    pa_tagstruct_putu32(t, u->ctag++);
+    pa_tagstruct_putu32(t, u->device_index);
+    pa_tagstruct_put_boolean(t, sink->muted);
+    pa_pstream_send_tagstruct(u->pstream, t);
+}
+
+#endif
+
+int pa__init(pa_module*m) {
+    pa_modargs *ma = NULL;
+    struct userdata *u = NULL;
+    char *server = NULL;
+    pa_strlist *server_list = NULL;
+    pa_sample_spec ss;
+    pa_channel_map map;
+    char *dn = NULL;
+#ifdef TUNNEL_SINK
+    pa_sink_new_data data;
+#else
+    pa_source_new_data data;
+#endif
+    bool automatic;
+#ifdef HAVE_X11
+    xcb_connection_t *xcb = NULL;
+#endif
+    const char *cookie_path;
+
+    pa_assert(m);
+
+    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+        pa_log("Failed to parse module arguments");
+        goto fail;
+    }
+
+    m->userdata = u = pa_xnew0(struct userdata, 1);
+    u->core = m->core;
+    u->module = m;
+    u->client = NULL;
+    u->pdispatch = NULL;
+    u->pstream = NULL;
+    u->server_name = NULL;
+#ifdef TUNNEL_SINK
+    u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));;
+    u->sink = NULL;
+    u->requested_bytes = 0;
+#else
+    u->source_name = pa_xstrdup(pa_modargs_get_value(ma, "source", NULL));;
+    u->source = NULL;
+#endif
+    u->smoother = pa_smoother_new(
+            PA_USEC_PER_SEC,
+            PA_USEC_PER_SEC*2,
+            true,
+            true,
+            10,
+            pa_rtclock_now(),
+            false);
+    u->ctag = 1;
+    u->device_index = u->channel = PA_INVALID_INDEX;
+    u->time_event = NULL;
+    u->ignore_latency_before = 0;
+    u->transport_usec = u->thread_transport_usec = 0;
+    u->remote_suspended = u->remote_corked = false;
+    u->counter = u->counter_delta = 0;
+
+    u->rtpoll = pa_rtpoll_new();
+
+    if (pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll) < 0) {
+        pa_log("pa_thread_mq_init() failed.");
+        goto fail;
+    }
+
+    if (pa_modargs_get_value_boolean(ma, "auto", &automatic) < 0) {
+        pa_log("Failed to parse argument \"auto\".");
+        goto fail;
+    }
+
+    cookie_path = pa_modargs_get_value(ma, "cookie", NULL);
+    server = pa_xstrdup(pa_modargs_get_value(ma, "server", NULL));
+
+    if (automatic) {
+#ifdef HAVE_X11
+        /* Need an X11 connection to get root properties */
+        if (getenv("DISPLAY") != NULL) {
+            if (!(xcb = xcb_connect(getenv("DISPLAY"), NULL)))
+                pa_log("xcb_connect() failed");
+            else {
+                if (xcb_connection_has_error(xcb)) {
+                    pa_log("xcb_connection_has_error() returned true");
+                    xcb_disconnect(xcb);
+                    xcb = NULL;
+                }
+            }
+        }
+#endif
+
+        /* Figure out the cookie the same way a normal client would */
+        if (!cookie_path)
+            cookie_path = getenv(ENV_COOKIE_FILE);
+
+#ifdef HAVE_X11
+        if (!cookie_path && xcb) {
+            char t[1024];
+            if (pa_x11_get_prop(xcb, 0, "PULSE_COOKIE", t, sizeof(t))) {
+                uint8_t cookie[PA_NATIVE_COOKIE_LENGTH];
+
+                if (pa_parsehex(t, cookie, sizeof(cookie)) != sizeof(cookie))
+                    pa_log("Failed to parse cookie data");
+                else {
+                    if (!(u->auth_cookie = pa_auth_cookie_create(u->core, cookie, sizeof(cookie))))
+                        goto fail;
+                }
+            }
+        }
+#endif
+
+        /* Same thing for the server name */
+        if (!server)
+            server = pa_xstrdup(getenv(ENV_DEFAULT_SERVER));
+
+#ifdef HAVE_X11
+        if (!server && xcb) {
+            char t[1024];
+            if (pa_x11_get_prop(xcb, 0, "PULSE_SERVER", t, sizeof(t)))
+                server = pa_xstrdup(t);
+        }
+#endif
+
+        /* Also determine the default sink/source on the other server */
+#ifdef TUNNEL_SINK
+        if (!u->sink_name)
+            u->sink_name = pa_xstrdup(getenv(ENV_DEFAULT_SINK));
+
+#ifdef HAVE_X11
+        if (!u->sink_name && xcb) {
+            char t[1024];
+            if (pa_x11_get_prop(xcb, 0, "PULSE_SINK", t, sizeof(t)))
+                u->sink_name = pa_xstrdup(t);
+        }
+#endif
+#else
+        if (!u->source_name)
+            u->source_name = pa_xstrdup(getenv(ENV_DEFAULT_SOURCE));
+
+#ifdef HAVE_X11
+        if (!u->source_name && xcb) {
+            char t[1024];
+            if (pa_x11_get_prop(xcb, 0, "PULSE_SOURCE", t, sizeof(t)))
+                u->source_name = pa_xstrdup(t);
+        }
+#endif
+#endif
+    }
+
+    if (!cookie_path && !u->auth_cookie)
+        cookie_path = PA_NATIVE_COOKIE_FILE;
+
+    if (cookie_path) {
+        if (!(u->auth_cookie = pa_auth_cookie_get(u->core, cookie_path, true, PA_NATIVE_COOKIE_LENGTH)))
+            goto fail;
+    }
+
+    if (server) {
+        if (!(server_list = pa_strlist_parse(server))) {
+            pa_log("Invalid server specified.");
+            goto fail;
+        }
+    } else {
+        char *ufn;
+
+        if (!automatic) {
+            pa_log("No server specified.");
+            goto fail;
+        }
+
+        pa_log("No server address found. Attempting default local sockets.");
+
+        /* The system wide instance via PF_LOCAL */
+        server_list = pa_strlist_prepend(server_list, PA_SYSTEM_RUNTIME_PATH PA_PATH_SEP PA_NATIVE_DEFAULT_UNIX_SOCKET);
+
+        /* The user instance via PF_LOCAL */
+        if ((ufn = pa_runtime_path(PA_NATIVE_DEFAULT_UNIX_SOCKET))) {
+            server_list = pa_strlist_prepend(server_list, ufn);
+            pa_xfree(ufn);
+        }
+    }
+
+    ss = m->core->default_sample_spec;
+    map = m->core->default_channel_map;
+    if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0) {
+        pa_log("Invalid sample format specification");
+        goto fail;
+    }
+
+    for (;;) {
+        server_list = pa_strlist_pop(server_list, &u->server_name);
+
+        if (!u->server_name) {
+            pa_log("Failed to connect to server '%s'", server);
+            goto fail;
+        }
+
+        pa_log_debug("Trying to connect to %s...", u->server_name);
+
+        if (!(u->client = pa_socket_client_new_string(m->core->mainloop, true, u->server_name, PA_NATIVE_DEFAULT_PORT))) {
+            pa_xfree(u->server_name);
+            u->server_name = NULL;
+            continue;
+        }
+
+        break;
+     }
+
+    pa_socket_client_set_callback(u->client, on_connection, u);
+
+#ifdef TUNNEL_SINK
+
+    if (!(dn = pa_xstrdup(pa_modargs_get_value(ma, "sink_name", NULL))))
+        dn = pa_sprintf_malloc("tunnel-sink.%s", u->server_name);
+
+    pa_sink_new_data_init(&data);
+    data.driver = __FILE__;
+    data.module = m;
+    data.namereg_fail = false;
+    pa_sink_new_data_set_name(&data, dn);
+    pa_sink_new_data_set_sample_spec(&data, &ss);
+    pa_sink_new_data_set_channel_map(&data, &map);
+    pa_proplist_setf(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "%s%s%s", pa_strempty(u->sink_name), u->sink_name ? " on " : "", u->server_name);
+    pa_proplist_sets(data.proplist, "tunnel.remote.server", u->server_name);
+    if (u->sink_name)
+        pa_proplist_sets(data.proplist, "tunnel.remote.sink", u->sink_name);
+
+    if (pa_modargs_get_proplist(ma, "sink_properties", data.proplist, PA_UPDATE_REPLACE) < 0) {
+        pa_log("Invalid properties");
+        pa_sink_new_data_done(&data);
+        goto fail;
+    }
+
+    u->sink = pa_sink_new(m->core, &data, PA_SINK_NETWORK|PA_SINK_LATENCY);
+    pa_sink_new_data_done(&data);
+
+    if (!u->sink) {
+        pa_log("Failed to create sink.");
+        goto fail;
+    }
+
+    u->sink->parent.process_msg = sink_process_msg;
+    u->sink->userdata = u;
+    u->sink->set_state_in_main_thread = sink_set_state_in_main_thread_cb;
+    pa_sink_set_set_volume_callback(u->sink, sink_set_volume);
+    pa_sink_set_set_mute_callback(u->sink, sink_set_mute);
+
+    u->sink->refresh_volume = u->sink->refresh_muted = false;
+
+/*     pa_sink_set_latency_range(u->sink, MIN_NETWORK_LATENCY_USEC, 0); */
+
+    pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
+    pa_sink_set_rtpoll(u->sink, u->rtpoll);
+
+#else
+
+    if (!(dn = pa_xstrdup(pa_modargs_get_value(ma, "source_name", NULL))))
+        dn = pa_sprintf_malloc("tunnel-source.%s", u->server_name);
+
+    pa_source_new_data_init(&data);
+    data.driver = __FILE__;
+    data.module = m;
+    data.namereg_fail = false;
+    pa_source_new_data_set_name(&data, dn);
+    pa_source_new_data_set_sample_spec(&data, &ss);
+    pa_source_new_data_set_channel_map(&data, &map);
+    pa_proplist_setf(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "%s%s%s", pa_strempty(u->source_name), u->source_name ? " on " : "", u->server_name);
+    pa_proplist_sets(data.proplist, "tunnel.remote.server", u->server_name);
+    if (u->source_name)
+        pa_proplist_sets(data.proplist, "tunnel.remote.source", u->source_name);
+
+    if (pa_modargs_get_proplist(ma, "source_properties", data.proplist, PA_UPDATE_REPLACE) < 0) {
+        pa_log("Invalid properties");
+        pa_source_new_data_done(&data);
+        goto fail;
+    }
+
+    u->source = pa_source_new(m->core, &data, PA_SOURCE_NETWORK|PA_SOURCE_LATENCY);
+    pa_source_new_data_done(&data);
+
+    if (!u->source) {
+        pa_log("Failed to create source.");
+        goto fail;
+    }
+
+    u->source->parent.process_msg = source_process_msg;
+    u->source->set_state_in_main_thread = source_set_state_in_main_thread_cb;
+    u->source->userdata = u;
+
+/*     pa_source_set_latency_range(u->source, MIN_NETWORK_LATENCY_USEC, 0); */
+
+    pa_source_set_asyncmsgq(u->source, u->thread_mq.inq);
+    pa_source_set_rtpoll(u->source, u->rtpoll);
+
+    u->mcalign = pa_mcalign_new(pa_frame_size(&u->source->sample_spec));
+#endif
+
+    u->time_event = NULL;
+
+    u->maxlength = (uint32_t) -1;
+#ifdef TUNNEL_SINK
+    u->tlength = u->minreq = u->prebuf = (uint32_t) -1;
+#else
+    u->fragsize = (uint32_t) -1;
+#endif
+
+    if (!(u->thread = pa_thread_new("module-tunnel", thread_func, u))) {
+        pa_log("Failed to create thread.");
+        goto fail;
+    }
+
+#ifdef TUNNEL_SINK
+    pa_sink_put(u->sink);
+#else
+    pa_source_put(u->source);
+#endif
+
+    pa_xfree(dn);
+
+    if (server)
+        pa_xfree(server);
+
+    if (server_list)
+        pa_strlist_free(server_list);
+
+#ifdef HAVE_X11
+    if (xcb)
+        xcb_disconnect(xcb);
+#endif
+
+    pa_modargs_free(ma);
+
+    return 0;
+
+fail:
+    pa__done(m);
+
+    if (server)
+        pa_xfree(server);
+
+    if (server_list)
+        pa_strlist_free(server_list);
+
+#ifdef HAVE_X11
+    if (xcb)
+        xcb_disconnect(xcb);
+#endif
+
+    if (ma)
+        pa_modargs_free(ma);
+
+    pa_xfree(dn);
+
+    return -1;
+}
+
+void pa__done(pa_module*m) {
+    struct userdata* u;
+
+    pa_assert(m);
+
+    if (!(u = m->userdata))
+        return;
+
+#ifdef TUNNEL_SINK
+    if (u->sink)
+        pa_sink_unlink(u->sink);
+#else
+    if (u->source)
+        pa_source_unlink(u->source);
+#endif
+
+    if (u->thread) {
+        pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL);
+        pa_thread_free(u->thread);
+    }
+
+    pa_thread_mq_done(&u->thread_mq);
+
+#ifdef TUNNEL_SINK
+    if (u->sink)
+        pa_sink_unref(u->sink);
+#else
+    if (u->source)
+        pa_source_unref(u->source);
+#endif
+
+    if (u->rtpoll)
+        pa_rtpoll_free(u->rtpoll);
+
+    if (u->pstream) {
+        pa_pstream_unlink(u->pstream);
+        pa_pstream_unref(u->pstream);
+    }
+
+    if (u->pdispatch)
+        pa_pdispatch_unref(u->pdispatch);
+
+    if (u->client)
+        pa_socket_client_unref(u->client);
+
+    if (u->auth_cookie)
+        pa_auth_cookie_unref(u->auth_cookie);
+
+    if (u->smoother)
+        pa_smoother_free(u->smoother);
+
+    if (u->time_event)
+        u->core->mainloop->time_free(u->time_event);
+
+#ifndef TUNNEL_SINK
+    if (u->mcalign)
+        pa_mcalign_free(u->mcalign);
+#endif
+
+#ifdef TUNNEL_SINK
+    pa_xfree(u->sink_name);
+#else
+    pa_xfree(u->source_name);
+#endif
+    pa_xfree(u->server_name);
+
+    pa_xfree(u->device_description);
+    pa_xfree(u->server_fqdn);
+    pa_xfree(u->user_name);
+
+    pa_xfree(u);
+}