i might get four goobahs

protocol

@@ -3,28 +3,50 @@ PROTOCOL
 this is almost a carbon copy of every other tcp/ip protocol i write
 don't care enough to make it fancy
 
+all numbers are packed unless stated otherwise
 packed values are msb
 
-byte n is b.sub n
+byte n is b.n
+region n is r.n
 
 ---
 
 byte the zero: packet id
 byte the one: region count
-for 0 <= n < b.sub 1
+for 0 <= n < b.1
-    byte the byte after the last byte byte:
+    byte the byte after the previous byte byte:
         region length <  128: one byte
         region length >= 128: two bytes, highest bit on msb always 1
 
-byte the bytes after the header octet bytes:
+byte the bytes after the header octet bytes bytes:
     raw body data shoved next to each other with no separation
 
 ---    
 
-server -> client
+client -> server
+    id 0: registration attempt
+        r.0 - username - string
+        r.1 - pin      - ushort (max 9999)
        
+    id 1: login attempt
+        r.0 - username - string
+        r.1 - pin      - ushort (max 9999)
+       
+    id 2: ctx change response
+        r.0 - ack    - bool
+        r.1 - ctx id - ushort
     
 --- 
    
-client -> server
+server -> client
+    id 0: registration response
+        r.0 - succeeded - bool
+        r.1 - status    - string
     
+    id 1: login response
+        r.0 -  succeeded - bool
+        r.1 -> status    - string (if r.0 false)
+            -> user id   - ushort (if r.0 true)
+        
+    id 2: ctx change request
+        r.0 - ctx id - ushort

src/flimit.c

@@ -0,0 +1,18 @@
+#include "flimit.h"
+
+void frame_limit_tick(flimit_t *fld) {
+    time(fld);
+}
+
+void frame_limit_wait(flimit_t *fld, unsigned int fps) {
+    double fr = 1.0 / fps, dt, wait;
+    struct timespec swait;
+    
+    time_t now = time(NULL);
+    dt = difftime(now, *fld);
+    
+    if(dt < fr) {
+        wait = fr - dt;
+        usleep((unsigned int)(wait * 1000000));
+    }
+}

src/flimit.h

@@ -0,0 +1,13 @@
+#ifndef FLIMIT_H
+#define FLIMIT_H
+
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+typedef time_t flimit_t;
+
+void frame_limit_tick(flimit_t*);
+void frame_limit_wait(flimit_t*, unsigned int);
+
+#endif

src/server/server.c

@@ -2,12 +2,20 @@
 
 void server() {
     server_context_start();
+    
     socket_t *sock = sock_server_init("6770");
     sock_start(sock);
+    sock_set_nonblocking(sock);
     
-    sock_set_timeout_us(sock, 0, 100);
+    flimit_t vsync;
+    for(;;) {
+        frame_limit_tick(&vsync);
         
         
+        
+        frame_limit_wait(&vsync, 1000);
+    }
+    
     printf("awaiting connection...\r\n");
     socket_t *conn = sock_accept(sock);
 

src/server/server.h

@@ -4,6 +4,9 @@
 #include <stdio.h>
 #include "sock.h"
 #include "queue.h"
+#include "flimit.h"
+
+#define MAX_CONNS 100
 
 void server();