[PATCH spice-streaming-agent 4/6] Separate handling start/stop message from server

[Frediano Ziglio <fziglio@xxxxxxxxxx>]

Prepare to add support for other messages.

Signed-off-by: Frediano Ziglio <fziglio@xxxxxxxxxx>
---
 src/spice-streaming-agent.cpp | 26 ++++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/src/spice-streaming-agent.cpp b/src/spice-streaming-agent.cpp
index 08f4b48..41b4d3d 100644
--- a/src/spice-streaming-agent.cpp
+++ b/src/spice-streaming-agent.cpp
@@ -78,10 +78,11 @@ static int have_something_to_read(int timeout)
     return 0;
 }
 
+static int read_stream_start_stop(uint32_t len);
+
 static int read_command_from_device(void)
 {
     StreamDevHeader hdr;
-    uint8_t msg[64];
     int n;
 
     std::lock_guard<std::mutex> stream_guard(stream_mtx);
@@ -93,15 +94,24 @@ static int read_command_from_device(void)
         ERROR("BAD VERSION " << hdr.protocol_version <<
               " (expected is " << STREAM_DEVICE_PROTOCOL << ")");
     }
-    if (hdr.type != STREAM_TYPE_START_STOP) {
-        ERROR("UNKNOWN msg of type " << hdr.type);
+
+    switch (hdr.type) {
+    case STREAM_TYPE_START_STOP:
+        return read_stream_start_stop(hdr.size);
     }
-    if (hdr.size >= sizeof(msg)) {
-        ERROR("msg size (" << hdr.size << ") is too long (longer than " << sizeof(msg));
+    ERROR("UNKNOWN msg of type " << hdr.type);
+}
+
+static int read_stream_start_stop(uint32_t len)
+{
+    uint8_t msg[256];
+
+    if (len >= sizeof(msg)) {
+        ERROR("msg size (" << len << ") is too long (longer than " << sizeof(msg));
     }
-    n = read(streamfd, &msg, hdr.size);
-    if (n != hdr.size) {
-        ERROR("read command from device FAILED -- read " << n << " expected " << hdr.size);
+    int n = read(streamfd, &msg, len);
+    if (n != len) {
+        ERROR("read command from device FAILED -- read " << n << " expected " << len);
     }
     streaming_requested = (msg[0] != 0); /* num_codecs */
     syslog(LOG_INFO, "GOT START_STOP message -- request to %s streaming\n",
-- 
2.14.3

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