raop: Add autoreconnect feature

This patch adds the autoreconnect feature to the raop module.
This is mainly to be used in a server context, but can be used
also in a desktop usage context.

With autoreconnect feature, the raop module behaves like this:

- At initialisation or in case of the RTSP TCP connection lost, it
  tries to reconnect every 5 seconds
- In case of any fatal error, it tries to reconnect every 5 seconds
- In UDP mode, if no timing packets received anymore for a long time,
  RTSP connection is closed, then it tries to reconnect..
- After reconnection, once RTSP session has been established again,
  playing is resumed automatically.
- When the connection is not established yet (or loss), the sink
  behaves like a null sink. In the source code I called it "autonull",
  even if autonull is set to autoreconnect param value, it could be
  split into two different params.

src/modules/raop/module-raop-sink.c

@@ -62,6 +62,7 @@ static const char* const valid_modargs[] = {
     "username",
     "password",
     "latency_msec",
+    "autoreconnect",
     NULL
 };
 

src/modules/raop/raop-client.c

@@ -95,6 +95,7 @@ struct pa_raop_client {
     pa_rtsp_client *rtsp;
     char *sci, *sid;
     char *password;
+    bool autoreconnect;
 
     pa_raop_protocol_t protocol;
     pa_raop_encryption_t encryption;
@@ -1379,8 +1380,39 @@ static void rtsp_auth_cb(pa_rtsp_client *rtsp, pa_rtsp_state_t state, pa_rtsp_st
     }
 }
 
+
+void pa_raop_client_disconnect(pa_raop_client *c) {
+    c->is_recording = false;
+
+    if (c->tcp_sfd >= 0)
+        pa_close(c->tcp_sfd);
+    c->tcp_sfd = -1;
+
+    if (c->udp_sfd >= 0)
+        pa_close(c->udp_sfd);
+    c->udp_sfd = -1;
+
+    /* Polling sockets will be closed by sink */
+    c->udp_cfd = c->udp_tfd = -1;
+    c->tcp_sfd = -1;
+
+    pa_log_error("RTSP control channel closed (disconnected)");
+
+    if (c->rtsp)
+        pa_rtsp_client_free(c->rtsp);
+    if (c->sid)
+        pa_xfree(c->sid);
+    c->rtsp = NULL;
+    c->sid = NULL;
+
+    if (c->state_callback)
+        c->state_callback((int) PA_RAOP_DISCONNECTED, c->state_userdata);
+
+}
+
+
 pa_raop_client* pa_raop_client_new(pa_core *core, const char *host, pa_raop_protocol_t protocol,
-                                   pa_raop_encryption_t encryption, pa_raop_codec_t codec) {
+                                   pa_raop_encryption_t encryption, pa_raop_codec_t codec, bool autoreconnect) {
     pa_raop_client *c;
 
     pa_parsed_address a;
@@ -1408,6 +1440,7 @@ pa_raop_client* pa_raop_client_new(pa_core *core, const char *host, pa_raop_prot
     c->rtsp = NULL;
     c->sci = c->sid = NULL;
     c->password = NULL;
+    c->autoreconnect = autoreconnect;
 
     c->protocol = protocol;
     c->encryption = encryption;
@@ -1473,7 +1506,7 @@ int pa_raop_client_authenticate (pa_raop_client *c, const char *password) {
     c->password = NULL;
     if (password)
         c->password = pa_xstrdup(password);
-    c->rtsp = pa_rtsp_client_new(c->core->mainloop, c->host, c->port, DEFAULT_USER_AGENT);
+    c->rtsp = pa_rtsp_client_new(c->core->mainloop, c->host, c->port, DEFAULT_USER_AGENT, c->autoreconnect);
 
     pa_assert(c->rtsp);
 
@@ -1502,7 +1535,7 @@ int pa_raop_client_announce(pa_raop_client *c) {
         return 1;
     }
 
-    c->rtsp = pa_rtsp_client_new(c->core->mainloop, c->host, c->port, DEFAULT_USER_AGENT);
+    c->rtsp = pa_rtsp_client_new(c->core->mainloop, c->host, c->port, DEFAULT_USER_AGENT, c->autoreconnect);
 
     pa_assert(c->rtsp);
 
@@ -1545,7 +1578,6 @@ bool pa_raop_client_can_stream(pa_raop_client *c) {
     pa_assert(c);
 
     if (!c->rtsp || !c->sci) {
-        pa_log_debug("Can't stream, connection not established yet...");
         return false;
     }
 
@@ -1729,6 +1761,10 @@ bool pa_raop_client_register_pollfd(pa_raop_client *c, pa_rtpoll *poll, pa_rtpol
     return oob;
 }
 
+bool pa_raop_client_is_timing_fd(pa_raop_client *c, const int fd) {
+    return fd == c->udp_tfd;
+}
+
 pa_volume_t pa_raop_client_adjust_volume(pa_raop_client *c, pa_volume_t volume) {
     double minv, maxv;
 

src/modules/raop/raop-client.h

@@ -57,7 +57,7 @@ typedef enum pa_raop_state {
 } pa_raop_state_t;
 
 pa_raop_client* pa_raop_client_new(pa_core *core, const char *host, pa_raop_protocol_t protocol,
-                                   pa_raop_encryption_t encryption, pa_raop_codec_t codec);
+                                   pa_raop_encryption_t encryption, pa_raop_codec_t codec, bool autoreconnect);
 void pa_raop_client_free(pa_raop_client *c);
 
 int pa_raop_client_authenticate(pa_raop_client *c, const char *password);
@@ -71,9 +71,11 @@ int pa_raop_client_stream(pa_raop_client *c);
 int pa_raop_client_set_volume(pa_raop_client *c, pa_volume_t volume);
 int pa_raop_client_flush(pa_raop_client *c);
 int pa_raop_client_teardown(pa_raop_client *c);
+void pa_raop_client_disconnect(pa_raop_client *c);
 
 void pa_raop_client_get_frames_per_block(pa_raop_client *c, size_t *size);
 bool pa_raop_client_register_pollfd(pa_raop_client *c, pa_rtpoll *poll, pa_rtpoll_item **poll_item);
+bool pa_raop_client_is_timing_fd(pa_raop_client *c, const int fd);
 pa_volume_t pa_raop_client_adjust_volume(pa_raop_client *c, pa_volume_t volume);
 void pa_raop_client_handle_oob_packet(pa_raop_client *c, const int fd, const uint8_t packet[], ssize_t size);
 ssize_t pa_raop_client_send_audio_packet(pa_raop_client *c, pa_memchunk *block, size_t offset);

src/modules/raop/raop-sink.c

@@ -59,12 +59,16 @@
 #include <pulsecore/thread-mq.h>
 #include <pulsecore/poll.h>
 #include <pulsecore/rtpoll.h>
+#include <pulsecore/core-rtclock.h>
 #include <pulsecore/time-smoother.h>
 
 #include "raop-sink.h"
 #include "raop-client.h"
 #include "raop-util.h"
 
+#define UDP_TIMING_PACKET_LOSS_MAX (30 * PA_USEC_PER_SEC)
+#define UDP_TIMING_PACKET_DISCONNECT_CYCLE 3
+
 struct userdata {
     pa_core *core;
     pa_module *module;
@@ -78,11 +82,16 @@ struct userdata {
     bool oob;
 
     pa_raop_client *raop;
+    char *server;
     pa_raop_protocol_t protocol;
     pa_raop_encryption_t encryption;
     pa_raop_codec_t codec;
+    bool autoreconnect;
+    /* if true, behaves like a null-sink when disconnected */
+    bool autonull;
 
     size_t block_size;
+    pa_usec_t block_usec;
     pa_memchunk memchunk;
 
     pa_usec_t delay;
@@ -91,10 +100,13 @@ struct userdata {
     uint64_t write_count;
 
     uint32_t latency;
+    /* Consider as first I/O thread iteration, can be switched to true in autoreconnect mode */
+    bool first;
 };
 
 enum {
-    PA_SINK_MESSAGE_SET_RAOP_STATE = PA_SINK_MESSAGE_MAX
+    PA_SINK_MESSAGE_SET_RAOP_STATE = PA_SINK_MESSAGE_MAX,
+    PA_SINK_MESSAGE_DISCONNECT_REQUEST
 };
 
 static void userdata_free(struct userdata *u);
@@ -136,10 +148,23 @@ static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offse
     pa_assert(u->raop);
 
     switch (code) {
+        /* Exception : for this message, we are in main thread, msg sent from the IO/thread
+           Done here, as alloc/free of rtsp_client is also done in this thread for other cases */
+        case PA_SINK_MESSAGE_DISCONNECT_REQUEST: {
+            if (u->sink->state == PA_SINK_RUNNING) {
+                /* Disconnect raop client, and restart the whole chain since
+                 * the authentication token might be outdated */
+                pa_raop_client_disconnect(u->raop);
+                pa_raop_client_authenticate(u->raop, NULL);
+            }
+
+            return 0;
+        }
+
         case PA_SINK_MESSAGE_GET_LATENCY: {
             int64_t r = 0;
 
-            if (pa_raop_client_can_stream(u->raop))
+            if (u->autonull || pa_raop_client_can_stream(u->raop))
                 r = sink_get_latency(u);
 
             *((int64_t*) data) = r;
@@ -154,6 +179,17 @@ static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offse
                         pa_module_unload_request(u->module, true);
                     }
 
+                    if (u->autoreconnect && u->sink->state == PA_SINK_RUNNING) {
+                        pa_usec_t now;
+                        now = pa_rtclock_now();
+                        pa_smoother_reset(u->smoother, now, false);
+
+                        if (!pa_raop_client_is_alive(u->raop)) {
+                            /* Connecting will trigger a RECORD and start steaming */
+                            pa_raop_client_announce(u->raop);
+                        }
+                    }
+
                     return 0;
                 }
 
@@ -171,6 +207,7 @@ static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offse
                     now = pa_rtclock_now();
                     u->write_count = 0;
                     u->start = now;
+                    u->first = true;
                     pa_rtpoll_set_timer_absolute(u->rtpoll, now);
 
                     if (u->sink->thread_info.state == PA_SINK_SUSPENDED) {
@@ -205,10 +242,22 @@ static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offse
                         u->rtpoll_item = NULL;
                     }
 
-                    if (u->sink->thread_info.state == PA_SINK_SUSPENDED)
+                    if (u->sink->thread_info.state == PA_SINK_SUSPENDED) {
                         pa_rtpoll_set_timer_disabled(u->rtpoll);
-                    else if (u->sink->thread_info.state != PA_SINK_IDLE)
-                        pa_module_unload_request(u->module, true);
+
+                        return 0;
+                    }
+
+                    if (u->autoreconnect) {
+                        if (u->sink->thread_info.state != PA_SINK_IDLE) {
+                            if (!u->autonull)
+                                pa_rtpoll_set_timer_disabled(u->rtpoll);
+                            pa_raop_client_authenticate(u->raop, NULL);
+                        }
+                    } else {
+                        if (u->sink->thread_info.state != PA_SINK_IDLE)
+                            pa_module_unload_request(u->module, true);
+                    }
 
                     return 0;
                 }
@@ -265,8 +314,17 @@ static int sink_set_state_in_io_thread_cb(pa_sink *s, pa_sink_state_t new_state,
             now = pa_rtclock_now();
             pa_smoother_reset(u->smoother, now, false);
 
+            /* If autonull is enabled, I/O thread is always eating chunks since
+             * it is emulating a null sink */
+            if (u->autonull) {
+                u->start = now;
+                u->write_count = 0;
+                u->first = true;
+                pa_rtpoll_set_timer_absolute(u->rtpoll, now);
+            }
+
             if (!pa_raop_client_is_alive(u->raop)) {
-                /* Connecting will trigger a RECORD and start steaming */
+                /* Connecting will trigger a RECORD and start streaming */
                 pa_raop_client_announce(u->raop);
             } else if (!pa_raop_client_is_recording(u->raop)) {
                 /* RECORD alredy sent, simply start streaming */
@@ -342,6 +400,8 @@ static void sink_set_mute_cb(pa_sink *s) {
 static void thread_func(void *userdata) {
     struct userdata *u = userdata;
     size_t offset = 0;
+    pa_usec_t last_timing;
+    uint32_t check_timing_count;
 
     pa_assert(u);
 
@@ -357,6 +417,7 @@ static void thread_func(void *userdata) {
         uint64_t position;
         size_t index;
         int ret;
+        bool canstream, sendstream, on_timeout;
 
         /* Polling (audio data + control socket + timing socket). */
         if ((ret = pa_rtpoll_run(u->rtpoll)) < 0)
@@ -369,6 +430,7 @@ static void thread_func(void *userdata) {
                 pa_sink_process_rewind(u->sink, 0);
         }
 
+        on_timeout = pa_rtpoll_timer_elapsed(u->rtpoll);
         if (u->rtpoll_item) {
             pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, &nbfds);
             /* If !oob: streaming driven by pollds (POLLOUT) */
@@ -384,12 +446,19 @@ static void thread_func(void *userdata) {
             }
 
             /* if oob: streaming managed by timing, pollfd for oob sockets */
-            if (pollfd && u->oob && !pa_rtpoll_timer_elapsed(u->rtpoll)) {
+            if (pollfd && u->oob && !on_timeout) {
                 uint8_t packet[32];
                 ssize_t read;
 
                 for (i = 0; i < nbfds; i++) {
                     if (pollfd->revents & POLLERR) {
+                        if (u->autoreconnect && pa_raop_client_is_alive(u->raop)) {
+                            pollfd->revents = 0;
+                            pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->sink),
+                                              PA_SINK_MESSAGE_DISCONNECT_REQUEST, 0, 0, NULL, NULL);
+                            continue;
+                        }
+
                         /* one of UDP fds is in faulty state, may have been disconnected, this is fatal  */
                         goto fail;
                     }
@@ -397,6 +466,10 @@ static void thread_func(void *userdata) {
                         pollfd->revents = 0;
                         read = pa_read(pollfd->fd, packet, sizeof(packet), NULL);
                         pa_raop_client_handle_oob_packet(u->raop, pollfd->fd, packet, read);
+                        if (pa_raop_client_is_timing_fd(u->raop, pollfd->fd)) {
+                            last_timing = pa_rtclock_now();
+                            check_timing_count = 1;
+                        }
                     }
 
                     pollfd++;
@@ -406,65 +479,133 @@ static void thread_func(void *userdata) {
             }
         }
 
-        if (u->sink->thread_info.state != PA_SINK_RUNNING)
+        if (u->sink->thread_info.state != PA_SINK_RUNNING) {
             continue;
-        if (!pa_raop_client_can_stream(u->raop))
-            continue;
-
-        /* This assertion is meant to silence a complaint from Coverity about
-         * pollfd being possibly NULL when we access it later. That's a false
-         * positive, because we check pa_raop_client_can_stream() above, and if
-         * that returns true, it means that the connection is up, and when the
-         * connection is up, pollfd will be non-NULL. */
-        pa_assert(pollfd);
-
-        if (u->memchunk.length <= 0) {
-            if (u->memchunk.memblock)
-                pa_memblock_unref(u->memchunk.memblock);
-            pa_memchunk_reset(&u->memchunk);
-
-            /* Grab unencoded audio data from PulseAudio */
-            pa_sink_render_full(u->sink, u->block_size, &u->memchunk);
-            offset = u->memchunk.index;
         }
 
-        pa_assert(u->memchunk.length > 0);
+        if (u->first) {
+            last_timing = 0;
+            check_timing_count = 1;
+            intvl = 0;
+            u->first = false;
+        }
 
-        index = u->memchunk.index;
-        if (pa_raop_client_send_audio_packet(u->raop, &u->memchunk, offset) < 0) {
-            if (errno == EINTR) {
-                /* Just try again. */
-                pa_log_debug("Failed to write data to FIFO (EINTR), retrying");
-                goto fail;
-            } else if (errno != EAGAIN && !u->oob) {
-                /* Buffer is full, wait for POLLOUT. */
-                pollfd->events = POLLOUT;
-                pollfd->revents = 0;
-            } else {
-                pa_log("Failed to write data to FIFO: %s", pa_cstrerror(errno));
-                goto fail;
+        canstream = pa_raop_client_can_stream(u->raop);
+        now = pa_rtclock_now();
+
+        if (u->oob && u->autoreconnect && on_timeout) {
+            if (!canstream) {
+                last_timing = 0;
+            } else if (last_timing != 0) {
+                pa_usec_t since = now - last_timing;
+                /* Incoming Timing packets should be received every 3 seconds in UDP mode
+                   according to raop specifications.
+                   Here we disconnect if no packet received since UDP_TIMING_PACKET_LOSS_MAX seconds
+                   We only detect timing packet requests interruptions (we do nothing if no packet received at all), since some clients do not implement RTCP Timing requests at all */
+
+                if (since > (UDP_TIMING_PACKET_LOSS_MAX/UDP_TIMING_PACKET_DISCONNECT_CYCLE)*check_timing_count) {
+                    if (check_timing_count < UDP_TIMING_PACKET_DISCONNECT_CYCLE) {
+                        uint32_t since_in_sec = since / PA_USEC_PER_SEC;
+                        pa_log_warn(
+                                "UDP Timing Packets Warn #%d/%d- Nothing received since %d seconds from %s",
+                                check_timing_count,
+                                UDP_TIMING_PACKET_DISCONNECT_CYCLE-1, since_in_sec, u->server);
+                        check_timing_count++;
+                    } else {
+                        /* Limit reached, then request disconnect */
+                        check_timing_count = 1;
+                        last_timing = 0;
+                        if (pa_raop_client_is_alive(u->raop)) {
+                            pa_log_warn("UDP Timing Packets Warn limit reached - Requesting reconnect");
+                            pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->sink),
+                                              PA_SINK_MESSAGE_DISCONNECT_REQUEST, 0, 0, NULL, NULL);
+                            continue;
+                        }
+                    }
+                }
             }
-        } else {
-            u->write_count += (uint64_t) u->memchunk.index - (uint64_t) index;
-            position = u->write_count - pa_usec_to_bytes(u->delay, &u->sink->sample_spec);
+        }
 
-            now = pa_rtclock_now();
-            estimated = pa_bytes_to_usec(position, &u->sink->sample_spec);
-            pa_smoother_put(u->smoother, now, estimated);
+        if (!u->autonull) {
+            if (!canstream) {
+                pa_log_debug("Can't stream, connection not established yet...");
+                continue;
+            }
+            /* This assertion is meant to silence a complaint from Coverity about
+             * pollfd being possibly NULL when we access it later. That's a false
+             * positive, because we check pa_raop_client_can_stream() above, and if
+             * that returns true, it means that the connection is up, and when the
+             * connection is up, pollfd will be non-NULL. */
+            pa_assert(pollfd);
+        }
 
-            if (u->oob && !pollfd->revents) {
-                /* Sleep until next packet transmission */
-                intvl = u->start + pa_bytes_to_usec(u->write_count, &u->sink->sample_spec);
-                pa_rtpoll_set_timer_absolute(u->rtpoll, intvl);
-            } else if (!u->oob) {
-                if (u->memchunk.length > 0) {
-                    pollfd->events = POLLOUT;
-                    pollfd->revents = 0;
+        if (u->memchunk.length <= 0) {
+            if (intvl < now + u->block_usec) {
+                if (u->memchunk.memblock)
+                    pa_memblock_unref(u->memchunk.memblock);
+                pa_memchunk_reset(&u->memchunk);
+
+                /* Grab unencoded audio data from PulseAudio */
+                pa_sink_render_full(u->sink, u->block_size, &u->memchunk);
+                offset = u->memchunk.index;
+            }
+        }
+
+        if (u->memchunk.length > 0) {
+            index = u->memchunk.index;
+            sendstream = !u->autonull || (u->autonull && canstream);
+            if (sendstream && pa_raop_client_send_audio_packet(u->raop, &u->memchunk, offset) < 0) {
+                if (errno == EINTR) {
+                    /* Just try again. */
+                    pa_log_debug("Failed to write data to FIFO (EINTR), retrying");
+                    if (u->autoreconnect) {
+                        pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->sink), PA_SINK_MESSAGE_DISCONNECT_REQUEST,
+                                          0, 0, NULL, NULL);
+                        continue;
+                    } else
+                        goto fail;
+                } else if (errno != EAGAIN && !u->oob) {
+                    /* Buffer is full, wait for POLLOUT. */
+                    if (!u->oob) {
+                        pollfd->events = POLLOUT;
+                        pollfd->revents = 0;
+                    }
                 } else {
+                    pa_log("Failed to write data to FIFO: %s", pa_cstrerror(errno));
+                    if (u->autoreconnect) {
+                        pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->sink), PA_SINK_MESSAGE_DISCONNECT_REQUEST,
+                                          0, 0, NULL, NULL);
+                        continue;
+                    } else
+                        goto fail;
+                }
+            } else {
+                if (sendstream) {
+                    u->write_count += (uint64_t) u->memchunk.index - (uint64_t) index;
+                } else {
+                    u->write_count += u->memchunk.length;
+                    u->memchunk.length = 0;
+                }
+                position = u->write_count - pa_usec_to_bytes(u->delay, &u->sink->sample_spec);
+
+                now = pa_rtclock_now();
+                estimated = pa_bytes_to_usec(position, &u->sink->sample_spec);
+                pa_smoother_put(u->smoother, now, estimated);
+
+                if ((u->autonull && !canstream) || (u->oob && canstream && on_timeout)) {
+                    /* Sleep until next packet transmission */
                     intvl = u->start + pa_bytes_to_usec(u->write_count, &u->sink->sample_spec);
                     pa_rtpoll_set_timer_absolute(u->rtpoll, intvl);
-                    pollfd->revents = 0;
-                    pollfd->events = 0;
+                } else if (!u->oob) {
+                    if (u->memchunk.length > 0) {
+                        pollfd->events = POLLOUT;
+                        pollfd->revents = 0;
+                    } else {
+                        intvl = u->start + pa_bytes_to_usec(u->write_count, &u->sink->sample_spec);
+                        pa_rtpoll_set_timer_absolute(u->rtpoll, intvl);
+                        pollfd->revents = 0;
+                        pollfd->events = 0;
+                    }
                 }
             }
         }
@@ -592,6 +733,15 @@ pa_sink* pa_raop_sink_new(pa_module *m, pa_modargs *ma, const char *driver) {
     u->rtpoll = pa_rtpoll_new();
     u->rtpoll_item = NULL;
     u->latency = RAOP_DEFAULT_LATENCY;
+    u->autoreconnect = false;
+    u->server = pa_xstrdup(server);
+
+    if (pa_modargs_get_value_boolean(ma, "autoreconnect", &u->autoreconnect) < 0) {
+        pa_log("Failed to parse autoreconnect argument");
+        goto fail;
+    }
+    /* Linked for now, potentially ready for additional parameter */
+    u->autonull = u->autoreconnect;
 
     if (pa_modargs_get_value_u32(ma, "latency_msec", &u->latency) < 0) {
         pa_log("Failed to parse latency_msec argument");
@@ -723,7 +873,7 @@ pa_sink* pa_raop_sink_new(pa_module *m, pa_modargs *ma, const char *driver) {
     pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
     pa_sink_set_rtpoll(u->sink, u->rtpoll);
 
-    u->raop = pa_raop_client_new(u->core, server, u->protocol, u->encryption, u->codec);
+    u->raop = pa_raop_client_new(u->core, server, u->protocol, u->encryption, u->codec, u->autoreconnect);
 
     if (!(u->raop)) {
         pa_log("Failed to create RAOP client object");
@@ -734,6 +884,7 @@ pa_sink* pa_raop_sink_new(pa_module *m, pa_modargs *ma, const char *driver) {
     pa_raop_client_get_frames_per_block(u->raop, &u->block_size);
     u->block_size *= pa_frame_size(&ss);
     pa_sink_set_max_request(u->sink, u->block_size);
+    u->block_usec = pa_bytes_to_usec(u->block_size, &u->sink->sample_spec);
 
     pa_raop_client_set_state_callback(u->raop, raop_state_cb, u);
 
@@ -799,6 +950,8 @@ static void userdata_free(struct userdata *u) {
 
     if (u->card)
         pa_card_free(u->card);
+    if (u->server)
+        pa_xfree(u->server);
 
     pa_xfree(u);
 }

src/modules/rtp/rtsp_client.c

@@ -27,6 +27,8 @@
 #include <unistd.h>
 #include <sys/ioctl.h>
 #include <netinet/in.h>
+#include <pulse/rtclock.h>
+#include <pulse/timeval.h>
 
 #ifdef HAVE_SYS_FILIO_H
 #include <sys/filio.h>
@@ -42,9 +44,12 @@
 #include <pulsecore/ioline.h>
 #include <pulsecore/arpa-inet.h>
 #include <pulsecore/random.h>
+#include <pulsecore/core-rtclock.h>
 
 #include "rtsp_client.h"
 
+#define RECONNECT_INTERVAL (5 * PA_USEC_PER_SEC)
+
 struct pa_rtsp_client {
     pa_mainloop_api *mainloop;
     char *hostname;
@@ -73,9 +78,11 @@ struct pa_rtsp_client {
     uint32_t cseq;
     char *session;
     char *transport;
+    pa_time_event *reconnect_event;
+    bool autoreconnect;
 };
 
-pa_rtsp_client* pa_rtsp_client_new(pa_mainloop_api *mainloop, const char *hostname, uint16_t port, const char *useragent) {
+pa_rtsp_client* pa_rtsp_client_new(pa_mainloop_api *mainloop, const char *hostname, uint16_t port, const char *useragent, bool autoreconnect) {
     pa_rtsp_client *c;
 
     pa_assert(mainloop);
@@ -93,12 +100,23 @@ pa_rtsp_client* pa_rtsp_client_new(pa_mainloop_api *mainloop, const char *hostna
     else
         c->useragent = "PulseAudio RTSP Client";
 
+    c->autoreconnect = autoreconnect;
     return c;
 }
 
+static void free_events(pa_rtsp_client *c) {
+    pa_assert(c);
+
+    if (c->reconnect_event) {
+        c->mainloop->time_free(c->reconnect_event);
+        c->reconnect_event = NULL;
+    }
+}
+
 void pa_rtsp_client_free(pa_rtsp_client *c) {
     pa_assert(c);
 
+    free_events(c);
     if (c->sc)
         pa_socket_client_unref(c->sc);
 
@@ -293,6 +311,13 @@ static void line_callback(pa_ioline *line, const char *s, void *userdata) {
     pa_xfree(s2);
 }
 
+static void reconnect_cb(pa_mainloop_api *a, pa_time_event *e, const struct timeval *t, void *userdata) {
+    if (userdata) {
+        pa_rtsp_client *c = userdata;
+        pa_rtsp_connect(c);
+    }
+}
+
 static void on_connection(pa_socket_client *sc, pa_iochannel *io, void *userdata) {
     pa_rtsp_client *c = userdata;
     union {
@@ -310,7 +335,18 @@ static void on_connection(pa_socket_client *sc, pa_iochannel *io, void *userdata
     c->sc = NULL;
 
     if (!io) {
-        pa_log("Connection failed: %s", pa_cstrerror(errno));
+        if (c->autoreconnect) {
+            struct timeval tv;
+
+            pa_log_warn("Connection to server %s:%d failed: %s - will try later", c->hostname, c->port, pa_cstrerror(errno));
+
+            if (!c->reconnect_event)
+                c->reconnect_event = c->mainloop->time_new(c->mainloop, pa_timeval_rtstore(&tv, pa_rtclock_now() + RECONNECT_INTERVAL, true), reconnect_cb, c);
+            else
+                c->mainloop->time_restart(c->reconnect_event, pa_timeval_rtstore(&tv, pa_rtclock_now() + RECONNECT_INTERVAL, true));
+        } else {
+            pa_log("Connection to server %s:%d failed: %s", c->hostname, c->port, pa_cstrerror(errno));
+        }
         return;
     }
     pa_assert(!c->ioline);

src/modules/rtp/rtsp_client.h

@@ -54,7 +54,7 @@ typedef enum pa_rtsp_status {
 
 typedef void (*pa_rtsp_cb_t)(pa_rtsp_client *c, pa_rtsp_state_t state, pa_rtsp_status_t code, pa_headerlist *headers, void *userdata);
 
-pa_rtsp_client* pa_rtsp_client_new(pa_mainloop_api *mainloop, const char *hostname, uint16_t port, const char *useragent);
+pa_rtsp_client* pa_rtsp_client_new(pa_mainloop_api *mainloop, const char *hostname, uint16_t port, const char *useragent, bool autoreconnect);
 void pa_rtsp_client_free(pa_rtsp_client *c);
 
 int pa_rtsp_connect(pa_rtsp_client *c);