optimizing on packet buffering is hard

protocol

@@ -1,22 +1,19 @@
 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
 
+strings and blobs are prefixed with a packed ushort length
+
 byte n is b.n
 region n is r.n
 
 ---
 
-byte the zero: packet id
-byte the one: region count
-for 0 <= n < b.1
-    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 zero: 0xDE
+byte the one: 0xAD
+byte the two: packet id
+byte the 3-6: total body length - uint
 
 byte the bytes after the header octet bytes bytes:
     raw body data shoved next to each other with no separation

src/packet.c

@@ -0,0 +1,2 @@
+#include "packet.h"
+

src/packet.h

@@ -0,0 +1,23 @@
+#ifndef PACKET_H
+#define PACKET_H
+
+#include <stdlib.h>
+#include <stdint.h>
+#include "list.h"
+
+#define PCK_ID_REGISTER     0
+#define PCK_ID_LOGIN        1
+#define PCK_ID_CHANGE_CTX   2
+
+typedef struct packet_t packet_t;
+struct packet_t {
+    uint8_t id;
+    uint32_t length;
+    uint8_t **regions;
+    const uint8_t *region_lengths;
+    uint8_t region_count;
+};
+
+
+
+#endif

src/queue.c

@@ -70,8 +70,7 @@ void queue_nodes_free(queue_t *queue) {
     queue_node_t *ptr = queue->front, *next;
     while(ptr != NULL) {
         next = ptr->next;
-        if(ptr->data != NULL)
-            free(ptr->data);
+        free(ptr->data);
         
         free(ptr);
         ptr = next;

src/server/server.c

@@ -1,6 +1,7 @@
 #include "server.h"
 
 void server() {
+    user_context_init();
     server_context_start();
     
     socket_t *sock = sock_server_init("6770");
@@ -30,6 +31,8 @@ void server() {
     printf("got %s\r\n", in);
 
     server_context_stop();
+    user_context_free();
+    
     sock_stop(sock);
     sock_free(sock);
 }

src/server/user.c

@@ -5,7 +5,7 @@ struct {
     user_t **users;
 } ctx;
 
-void user_ctx_init() {
+void user_context_init() {
     ctx.active_users = list_init();
     ctx.users = (user_t**)malloc(MAX_CONNS * sizeof(user_t*));
     
@@ -14,13 +14,12 @@ void user_ctx_init() {
         ctx.users[i] = NULL;
 }
 
-void user_ctx_free() {
+void user_context_free() {
     list_free(ctx.active_users);
     
     int i;
     for(i = 0; i < MAX_CONNS; ++i)
-        if(ctx.users[i] != NULL)
-            free(ctx.users[i]);
+        free(ctx.users[i]);
     
     free(ctx.users);
 }

src/server/user.h

@@ -14,12 +14,14 @@ struct user_t {
     pthread_mutex_t mx_out_packets;
     
     socket_t *sock;
-    uint16_t context_id;
+    uint16_t user_id, context_id;
     uint16_t x, y;
 };
 
-void user_ctx_init();
+void user_context_init();
 
-void user_ctx_free();
+
+
+void user_context_free();
 
 #endif

src/stack.c

@@ -54,8 +54,7 @@ void stack_nodes_free(stack_t *stack) {
     stack_t *ptr = stack, *next;
     while(ptr != NULL) {
         next = ptr->next;
-        if(ptr->data != NULL)
-            free(ptr->data);
+        free(ptr->data);
 
         free(ptr);
         ptr = next;