diff --git a/src/main.c b/src/main.c
index 2c0ce03..c705ebb 100644
--- a/src/main.c
+++ b/src/main.c
@@ -6,13 +6,13 @@
 int main(int argc, char **argv) {
     packet_context_init(2);
     
-    packet_context_register(PCK_CTX_C2S, PCK_ID_REGISTER,   2, 8, 2);
-    packet_context_register(PCK_CTX_C2S, PCK_ID_LOGIN,      2, 8, 2);
-    packet_context_register(PCK_CTX_C2S, PCK_ID_CHANGE_CTX, 2, 8, 2);
+    packet_context_register(PCK_CTX_C2S, PCK_ID_REGISTER,   0, 2, 8, 2);
+    packet_context_register(PCK_CTX_C2S, PCK_ID_LOGIN,      0, 2, 8, 2);
+    packet_context_register(PCK_CTX_C2S, PCK_ID_CHANGE_CTX, 0, 2, 1, 2);
     
-    packet_context_register(PCK_CTX_S2C, PCK_ID_REGISTER,   2, 1, 16);
-    packet_context_register(PCK_CTX_S2C, PCK_ID_LOGIN,      3, 1, 2, 16);
-    packet_context_register(PCK_CTX_S2C, PCK_ID_CHANGE_CTX, 1, 2);
+    packet_context_register(PCK_CTX_S2C, PCK_ID_REGISTER,   0, 2, 1, 16);
+    packet_context_register(PCK_CTX_S2C, PCK_ID_LOGIN,      0, 3, 1, 2, 16);
+    packet_context_register(PCK_CTX_S2C, PCK_ID_CHANGE_CTX, 0, 1, 2);
     
     if(argc == 2 && strcmp(argv[1], "server") == 0) {
         register_spawn_type(SPAWN_SERVER);
diff --git a/src/packet.c b/src/packet.c
index ce8be5b..4c75134 100644
--- a/src/packet.c
+++ b/src/packet.c
@@ -8,6 +8,45 @@ struct packet_ctx_t {
     uint32_t length;
 };
 
-static packet_ctx_t *c2s_ctx;
-static packet_ctx_t *s2c_ctx;
+struct {
+    uint8_t count;
+    packet_ctx_t *c2s;
+    packet_ctx_t *s2c;
+} static ctx;
 
+void packet_context_init(uint8_t count) {
+    ctx.count = count;
+    ctx.c2s = (packet_ctx_t*)malloc(count * sizeof(packet_ctx_t));
+    ctx.s2c = (packet_ctx_t*)malloc(count * sizeof(packet_ctx_t));
+}
+
+void packet_context_register(uint8_t direction, uint8_t id, uint8_t iter_pt, uint8_t count, ...) {
+    if(id > ctx.count)
+        return;
+    
+    int i;
+    va_list args;
+    packet_ctx_t *ptr = 
+        direction == PCK_CTX_C2S ? ctx.c2s : ctx.s2c;
+        
+    ptr[id].length = 0;
+    ptr[id].iter_start = iter_pt;
+    ptr[id].region_count = count;
+    ptr[id].region_lengths = (uint16_t*)malloc(count * sizeof(uint16_t));
+    
+    va_start(args, count);
+    for(i = 0; i < count; ++i) {
+        uint16_t length = va_arg(args, uint16_t);
+        ptr[id].region_lengths[i] = length;
+        ptr[id].length += length;
+    }
+    va_end(args);
+}
+
+void packet_context_free() {
+    free(ctx.c2s.region_lengths);
+    free(ctx.c2s);
+    
+    free(ctx.s2c.region_lengths);
+    free(ctx.s2c);
+}
\ No newline at end of file
diff --git a/src/packet.h b/src/packet.h
index 1ed3c19..0f5b1e2 100644
--- a/src/packet.h
+++ b/src/packet.h
@@ -3,6 +3,7 @@
 
 #include <stdlib.h>
 #include <stdint.h>
+#include <stdarg.h>
 #include "list.h"
 #include "common.h"
 
@@ -28,6 +29,6 @@ void packet_context_init(uint8_t);
 void packet_context_register(uint8_t, uint8_t, uint8_t, ...);
 void packet_context_register_iter(uint8_t, uint8_t, uint8_t, uint8_t, ...);
 
-
+void packet_context_free();
 
 #endif
\ No newline at end of file