diff --git a/.gitignore b/.gitignore
index 3a3cff5..097adc5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,5 @@
 .vscode
-ciadpi.exe
\ No newline at end of file
+ciadpi.exe
+ciadpi
+*.o
+compile_flags.txt
diff --git a/conev.c b/conev.c
index 5831919..6387775 100644
--- a/conev.c
+++ b/conev.c
@@ -1,4 +1,4 @@
-#define CONEV_H
+
 #include "conev.h"
 
 #include <stdlib.h>
diff --git a/conev.h b/conev.h
index 6df99a1..eed9079 100644
--- a/conev.h
+++ b/conev.h
@@ -1,4 +1,6 @@
-#pragma once
+#ifndef CONEV_H
+#define CONEV_H
+
 #include <stdint.h>
 
 #ifndef __linux__
@@ -107,3 +109,5 @@ void destroy_pool(struct poolhd *pool);
 struct eval *next_event(struct poolhd *pool, int *offs, int *type);
 
 int mod_etype(struct poolhd *pool, struct eval *val, int type);
+
+#endif
diff --git a/desync.c b/desync.c
index 1b0fbb9..a87496a 100644
--- a/desync.c
+++ b/desync.c
@@ -1,5 +1,7 @@
 #define _GNU_SOURCE
 
+#include "desync.h"
+
 #include <stdio.h>
 #include <string.h>
 
@@ -16,7 +18,6 @@
     #include <sys/sendfile.h>
     #include <fcntl.h>
 
-    #include <desync.h>
     
     #ifdef MFD_CLOEXEC
         #include <sys/syscall.h>
@@ -391,12 +392,12 @@ ssize_t desync(int sfd, char *buffer, size_t bfsize,
         type = IS_HTTP;
     }
     if (len && host) {
-        LOG(LOG_S, "host: %.*s (%ld)\n",
+        LOG(LOG_S, "host: %.*s (%zd)\n",
             len, host, host - buffer);
     }
     // modify packet
     if (type == IS_HTTP && dp.mod_http) {
-        LOG(LOG_S, "modify HTTP: n=%ld\n", n);
+        LOG(LOG_S, "modify HTTP: n=%zd\n", n);
         if (mod_http(buffer, n, dp.mod_http)) {
             LOG(LOG_E, "mod http error\n");
             return -1;
@@ -420,10 +421,10 @@ ssize_t desync(int sfd, char *buffer, size_t bfsize,
             }
             if (!part_tls(buffer + lp, 
                     bfsize - lp, n - lp, pos - lp)) {
-                LOG(LOG_E, "tlsrec error: pos=%ld, n=%ld\n", pos, n);
+                LOG(LOG_E, "tlsrec error: pos=%ld, n=%zd\n", pos, n);
                 break;
             }
-            LOG(LOG_S, "tlsrec: pos=%ld, n=%ld\n", pos, n);
+            LOG(LOG_S, "tlsrec: pos=%ld, n=%zd\n", pos, n);
             n += 5;
             lp = pos + 5;
         }
@@ -462,7 +463,7 @@ ssize_t desync(int sfd, char *buffer, size_t bfsize,
             continue;
         }
         else if (pos <= 0 || pos >= n || pos <= lp) {
-            LOG(LOG_E, "split cancel: pos=%ld-%ld, n=%ld\n", lp, pos, n);
+            LOG(LOG_E, "split cancel: pos=%ld-%ld, n=%zd\n", lp, pos, n);
             break;
         }
         // send part
@@ -494,7 +495,7 @@ ssize_t desync(int sfd, char *buffer, size_t bfsize,
             default:
                 return -1;
         }
-        LOG(LOG_S, "split: pos=%ld-%ld (%ld), m: %s\n", lp, pos, s, demode_str[part.m]);
+        LOG(LOG_S, "split: pos=%ld-%ld (%zd), m: %s\n", lp, pos, s, demode_str[part.m]);
         
         if (s < 0) {
             if (get_e() == EAGAIN) {
@@ -503,14 +504,14 @@ ssize_t desync(int sfd, char *buffer, size_t bfsize,
             return -1;
         } 
         else if (s != (pos - lp)) {
-            LOG(LOG_E, "%ld != %ld\n", s, pos - lp);
+            LOG(LOG_E, "%zd != %ld\n", s, pos - lp);
             return lp + s;
         }
         lp = pos;
     }
     // send all/rest
     if (lp < n) {
-        LOG((lp ? LOG_S : LOG_L), "send: pos=%ld-%ld\n", lp, n);
+        LOG((lp ? LOG_S : LOG_L), "send: pos=%ld-%zd\n", lp, n);
         if (send(sfd, buffer + lp, n - lp, 0) < 0) {
             if (get_e() == EAGAIN) {
                 return lp;
diff --git a/desync.h b/desync.h
index db0632a..a1a67db 100644
--- a/desync.h
+++ b/desync.h
@@ -1,3 +1,15 @@
+#ifndef DESYNC_H
+#define DESYNC_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+#ifdef _WIN32
+    #include <winsock2.h>
+#else
+    #include <sys/socket.h>
+#endif
+
 ssize_t desync(int sfd, char *buffer, size_t bfsize, ssize_t n, ssize_t offset, struct sockaddr *dst, int dp_c);
 
 ssize_t desync_udp(int sfd, char *buffer, size_t bfsize, ssize_t n, struct sockaddr *dst, int dp_c);
@@ -9,4 +21,6 @@ struct tcpi {
     uint32_t unacked;
     uint32_t rrr[29];
     uint32_t notsent_bytes;
-};
\ No newline at end of file
+};
+
+#endif
diff --git a/error.h b/error.h
index 0352f7a..9eddcee 100644
--- a/error.h
+++ b/error.h
@@ -1,3 +1,6 @@
+#ifndef CIADPI_ERROR_H
+#define CIADPI_ERROR_H
+
 #include <stdio.h>
 #include <errno.h>
 
@@ -18,7 +21,7 @@
 
 #ifdef _WIN32
     #define uniperror(str) \
-        fprintf(stderr, "%s: %d\n", str, GetLastError())
+        fprintf(stderr, "%s: %ld\n", str, GetLastError())
 #else
     #ifdef ANDROID_APP
     #define uniperror(str) \
@@ -72,3 +75,5 @@ static inline const int unie(int e)
         inet_ntop(AF_INET, &dst.in.sin_addr, ADDR_STR, sizeof(ADDR_STR)); \
     else \
         inet_ntop(AF_INET6, &dst.in6.sin6_addr, ADDR_STR, sizeof(ADDR_STR));
+
+#endif
diff --git a/extend.c b/extend.c
index b91edf1..d5d6d59 100644
--- a/extend.c
+++ b/extend.c
@@ -1,3 +1,6 @@
+
+#include "extend.h"
+
 #ifdef _WIN32
     #include <ws2tcpip.h>
     
diff --git a/extend.h b/extend.h
index d861966..8a6ab8f 100644
--- a/extend.h
+++ b/extend.h
@@ -1,3 +1,11 @@
+#ifndef EXTEND_H
+#define EXTEND_H
+
+#include <stddef.h>
+
+#include "conev.h"
+#include "proxy.h"
+
 int connect_hook(struct poolhd *pool, struct eval *val, 
         struct sockaddr_ina *dst, int next);
         
@@ -14,4 +22,6 @@ ssize_t udp_hook(struct eval *val,
 int protect(int conn_fd, const char *path);
 #else
 #define protect(fd, path) 0
-#endif
\ No newline at end of file
+#endif
+
+#endif
diff --git a/mpool.c b/mpool.c
index bcc0792..9d4fd42 100644
--- a/mpool.c
+++ b/mpool.c
@@ -1,7 +1,9 @@
+
+#include "mpool.h"
+
 #include <stdlib.h>
 #include <string.h>
 
-#include "mpool.h"
 
 
 static inline int scmp(const struct elem *p, const struct elem *q)
diff --git a/mpool.h b/mpool.h
index 8f5d47d..c209dc0 100644
--- a/mpool.h
+++ b/mpool.h
@@ -1,3 +1,6 @@
+#ifndef MPOOL_H
+#define MPOOL_H
+
 #include <stdbool.h>
 #include <time.h>
 #include "kavl.h"
@@ -24,3 +27,5 @@ struct elem *mem_add(struct mphdr *hdr, char *str, int len);
 void mem_delete(struct mphdr *hdr, char *str, int len);
 
 void mem_destroy(struct mphdr *hdr);
+
+#endif
diff --git a/packets.c b/packets.c
index 540ba86..ebe4d39 100644
--- a/packets.c
+++ b/packets.c
@@ -1,6 +1,7 @@
 #define _GNU_SOURCE
 
-#include <packets.h>
+#include "packets.h"
+
 #include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/packets.h b/packets.h
index 5ef44c4..2c04449 100644
--- a/packets.h
+++ b/packets.h
@@ -1,3 +1,6 @@
+#ifndef PACKETS_H
+#define PACKETS_H
+
 #include <stdint.h>
 #include <stdlib.h>
 #include <stdbool.h>
@@ -43,3 +46,6 @@ int part_tls(char *buffer, size_t bsize, ssize_t n, long pos);
 //bool is_dns_req(char *buffer, size_t n);
 
 //bool is_quic_initial(char *buffer, size_t bsize);
+
+
+#endif
diff --git a/params.h b/params.h
index 825950c..a8ff74b 100644
--- a/params.h
+++ b/params.h
@@ -1,3 +1,6 @@
+#ifndef PARAMS_H
+#define PARAMS_H
+
 #include <stdint.h>
 #include <stdio.h>
 
@@ -107,4 +110,6 @@ extern struct packet fake_http;
 extern struct packet oob_data;
 extern struct packet fake_udp;
 
-extern char ip_option[1];
\ No newline at end of file
+extern char ip_option[1];
+
+#endif
diff --git a/proxy.c b/proxy.c
index de5ad7a..c938857 100644
--- a/proxy.c
+++ b/proxy.c
@@ -1,6 +1,8 @@
 #define _GNU_SOURCE
 #define EID_STR
 
+#include "proxy.h"
+
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -8,7 +10,6 @@
 #include <signal.h>
 #include <assert.h>
 
-#include "proxy.h"
 #include "params.h"
 #include "conev.h"
 #include "extend.h"
@@ -57,7 +58,8 @@ void map_fix(struct sockaddr_ina *addr, char f6)
     else if (!ipv6m->o64 && !ipv6m->o16 &&
             ipv6m->t16 == 0xffff && !f6) {
         addr->sa.sa_family = AF_INET;
-        addr->in.sin_addr = *(struct in_addr *)(&ipv6m->o32);
+        const struct in_addr *sin_addr_ptr = (struct in_addr *) &ipv6m->o32;
+        addr->in.sin_addr = *sin_addr_ptr;
     }
 }
 
@@ -617,7 +619,7 @@ int on_tunnel(struct poolhd *pool, struct eval *val,
                 }
                 sn = 0;
             }
-            LOG(LOG_S, "send: %ld != %ld (fd: %d)\n", sn, n, pair->fd);
+            LOG(LOG_S, "send: %zd != %zd (fd: %d)\n", sn, n, pair->fd);
             assert(!(val->buff.size || val->buff.offset));
             
             val->buff.size = n - sn;
@@ -738,7 +740,7 @@ static inline int on_request(struct poolhd *pool, struct eval *val,
             return 0;
         }
         if (n < S_SIZE_MIN) {
-            LOG(LOG_E, "ss: request to small (%ld)\n", n);
+            LOG(LOG_E, "ss: request to small (%zd)\n", n);
             return -1;
         }
         struct s5_req *r = (struct s5_req *)buffer;
@@ -780,7 +782,7 @@ static inline int on_request(struct poolhd *pool, struct eval *val,
         error = connect_hook(pool, val, &dst, EV_CONNECT);
     }
     else {
-        LOG(LOG_E, "ss: invalid version: 0x%x (%lu)\n", *buffer, n);
+        LOG(LOG_E, "ss: invalid version: 0x%x (%zd)\n", *buffer, n);
         return -1;
     }
     if (error) {
diff --git a/proxy.h b/proxy.h
index b9db0a8..43e5756 100644
--- a/proxy.h
+++ b/proxy.h
@@ -1,3 +1,6 @@
+#ifndef PROXY_H
+#define PROXY_H
+
 #include <stdint.h>
 
 #ifdef _WIN32
@@ -111,3 +114,5 @@ int listen_socket(struct sockaddr_ina *srv);
 int event_loop(int srvfd);
 
 int run(struct sockaddr_ina *srv);
+
+#endif
diff --git a/win_service.c b/win_service.c
index 0bfd7a4..8645f45 100644
--- a/win_service.c
+++ b/win_service.c
@@ -1,4 +1,6 @@
+
 #include "win_service.h"
+
 #include <windows.h>
 
 #define SERVICE_NAME "ByeDPI"
@@ -76,4 +78,4 @@ int register_winsvc(int argc, char *argv[])
     svc_argv = argv;
         
     return StartServiceCtrlDispatcher(ServiceTable);
-}
\ No newline at end of file
+}
diff --git a/win_service.h b/win_service.h
index 6c15d5d..65b797a 100644
--- a/win_service.h
+++ b/win_service.h
@@ -1 +1,7 @@
-int register_winsvc(int argc, char *argv[]);
\ No newline at end of file
+#ifndef WIN_SERVICE_H
+#define WIN_SERVICE_H
+
+int register_winsvc(int argc, char *argv[]);
+
+
+#endif