More work on wire protocol

Make separate payload for the header.
Make release-fd payloads
capture_buffer -> peek_buffer to avoid a copy
remove release-buffer, we really need to release each fd in the buffer
separately.
provide_buffer -> send_buffer so that we can also use this to send the
release-fd messages.
in pinossrc, send back release-fd messages when the fd is no longer in
use.

1 files changed, 22 insertions, 17 deletions

diff --git a/doc/design.txt b/doc/design.txt
index 242320d3..682e3b84 100644
--- a/doc/design.txt
+++ b/doc/design.txt
@@ -55,11 +55,8 @@ Wire
 
 Fixed header
 
-<flags>      : 4 bytes       : buffer flags
-<seq>        : 4 bytes       : sequence number
-<pts>        : 8 bytes       : presentation time
-<dts-offset> : 8 bytes       : dts-offset
-<length>     : 8 bytes       : total message length
+<version>     : 4 bytes       : total message length
+<length>      : 4 bytes       : total message length
 
 Followed by 1 or more type-length-data sections
 
@@ -69,28 +66,36 @@ Followed by 1 or more type-length-data sections
 
 Types:
 
- 0: fd-payload section
+ 1: header
+
+   Header for payload
+
+   <flags>      : 4 bytes      : buffer flags
+   <seq>        : 4 bytes      : sequence number
+   <pts>        : 8 bytes      : presentation time
+   <dts-offset> : 8 bytes      : dts-offset
+
+ 2: fd-payload section
 
    Used to send a buffer between client and server.
 
-   <id>        : 4 bytes      : id of the fd-payload
-   <offset>    : 8 bytes      : offset
-   <size>      : 8 bytes      : size
-   <fd-index>  : 4 bytes      : index of fd
+   <id>         : 4 bytes      : id of the fd-payload
+   <offset>     : 8 bytes      : offset
+   <size>       : 8 bytes      : size
+   <fd-index>   : 4 bytes      : index of fd
 
- 1: release fd-payload
+ 3: release fd-payload
 
    Release a fd-payload with <id>
 
-   <id>        : 4 bytes      : the id number of the released fd-payload
-
- 2: format change
+   <id>         : 4 bytes      : the id number of the released fd-payload
 
-   <format-id> : 1 byte       : format id
-   <format>    : 0-terminated : contains serialized format
+ 4: format change
 
+   <format-id>  : 1 byte       : format id
+   <format>     : 0-terminated : contains serialized format
 
- 3: property changes
+ 5: property changes
 
    <key>       : 0-terminated   : key
    <value>     : 0-terminated   : value