diff --git a/src/bench.c b/src/bench.c
index c60cddf..4f52c1a 100644
--- a/src/bench.c
+++ b/src/bench.c
@@ -1,11 +1,10 @@
 #include "common.h"
 
-#include <sodium.h>
-#include <string.h>
-#include <stdio.h>
-#include <time.h>
-#include <unistd.h>
 #include <inttypes.h>
+#include <sodium.h>
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
 
 #include "../argz/argz.h"
 #include "../mud/aegis256/aegis256.h"
@@ -60,7 +59,7 @@ gt_bench(int argc, char **argv)
     for (int i = 0; !gt_quit && size <= 1450; i++) {
         struct {
             int64_t min, mean, max, n;
-        } mbps = { .n = 0 };
+        } mbps = {.n = 0};
 
         int64_t bytes_max = (int64_t)1 << 24;
 
@@ -71,7 +70,7 @@ gt_bench(int argc, char **argv)
             while (!gt_quit && bytes <= bytes_max) {
                 if (chacha) {
                     crypto_aead_chacha20poly1305_encrypt(
-                            buf, NULL, buf, size, NULL, 0, NULL, npub, key);
+                        buf, NULL, buf, size, NULL, 0, NULL, npub, key);
                 } else {
                     aegis256_encrypt(buf, NULL, buf, size, NULL, 0, npub, key);
                 }
diff --git a/src/bind.c b/src/bind.c
index 013184b..c3b0c74 100644
--- a/src/bind.c
+++ b/src/bind.c
@@ -2,11 +2,9 @@
 #include "ctl.h"
 #include "iface.h"
 #include "ip.h"
-#include "str.h"
 #include "tun.h"
 
 #include <fcntl.h>
-#include <stdio.h>
 #include <sys/select.h>
 
 #include "../argz/argz.h"
@@ -103,8 +101,8 @@ gt_setup_mtu(struct mud *mud, size_t old, const char *tun_name)
 int
 gt_bind(int argc, char **argv)
 {
-    struct sockaddr_storage bind_addr = { .ss_family = AF_INET };
-    struct sockaddr_storage peer_addr = { 0 };
+    struct sockaddr_storage bind_addr = {.ss_family = AF_INET};
+    struct sockaddr_storage peer_addr = {0};
     unsigned short bind_port = 5000;
     unsigned short peer_port = bind_port;
     const char *dev = NULL;
@@ -128,7 +126,7 @@ gt_bind(int argc, char **argv)
     if (argz(bindz, argc, argv))
         return 1;
 
-    if (str_empty(keyfile)) {
+    if (EMPTY(keyfile)) {
         gt_log("a keyfile is needed!\n");
         return 1;
     }
@@ -175,7 +173,7 @@ gt_bind(int argc, char **argv)
 
     if (tun_set_persist(tun_fd, persist) == -1) {
         gt_log("couldn't %sable persist mode on device %s\n",
-                persist ? "en" : "dis", tun_name);
+               persist ? "en" : "dis", tun_name);
     }
 
     if (peer_addr.ss_family) {
@@ -191,7 +189,7 @@ gt_bind(int argc, char **argv)
         char dir[64];
         if (ctl_rundir(dir, sizeof(dir))) {
             gt_log("couldn't create %s/%s: %s\n",
-                    dir, tun_name, strerror(errno));
+                   dir, tun_name, strerror(errno));
         } else {
             gt_log("couldn't find a writable run/tmp directory\n");
         }
@@ -232,7 +230,7 @@ gt_bind(int argc, char **argv)
 
         FD_SET(ctl_fd, &rfds);
 
-        struct timeval tv = { 0 };
+        struct timeval tv = {0};
         int update = mud_update(mud);
 
         if (update >= 0) {
@@ -274,7 +272,7 @@ gt_bind(int argc, char **argv)
             tun_can_read = 0;
         }
 
-        if (mud_can_read && tun_can_write)  {
+        if (mud_can_read && tun_can_write) {
             int r = mud_recv(mud, buf, sizeof(buf));
 
             if (r > 0 && ip_is_valid(buf, r)) {
@@ -321,29 +319,27 @@ gt_bind(int argc, char **argv)
                     res.status.bind = bind_addr;
                     res.status.peer = peer_addr;
                     break;
-                case CTL_PATH_STATUS:
-                    {
-                        unsigned count = 0;
-                        struct mud_path *paths = mud_get_paths(mud, &count);
+                case CTL_PATH_STATUS: {
+                    unsigned count = 0;
+                    struct mud_path *paths = mud_get_paths(mud, &count);
 
-                        if (!paths) {
-                            res.ret = errno;
-                            break;
-                        }
-
-                        res.ret = EAGAIN;
-
-                        for (unsigned i = 0; i < count; i++) {
-                            memcpy(&res.path_status, &paths[i], sizeof(struct mud_path));
-                            if (sendto(ctl_fd, &res, sizeof(res), 0,
-                                       (const struct sockaddr *)&ss, sl) == -1)
-                                perror("sendto(ctl)");
-                        }
-
-                        free(paths);
-                        res.ret = 0;
+                    if (!paths) {
+                        res.ret = errno;
+                        break;
                     }
-                    break;
+
+                    res.ret = EAGAIN;
+
+                    for (unsigned i = 0; i < count; i++) {
+                        memcpy(&res.path_status, &paths[i], sizeof(struct mud_path));
+                        if (sendto(ctl_fd, &res, sizeof(res), 0,
+                                   (const struct sockaddr *)&ss, sl) == -1)
+                            perror("sendto(ctl)");
+                    }
+
+                    free(paths);
+                    res.ret = 0;
+                } break;
                 case CTL_BAD:
                     if (mud_get_bad(mud, &res.bad))
                         res.ret = errno;
diff --git a/src/common.h b/src/common.h
index a1518f9..0eefc95 100644
--- a/src/common.h
+++ b/src/common.h
@@ -4,16 +4,17 @@
 #define _GNU_SOURCE
 #endif
 
-#include <stdlib.h>
+#include <errno.h>
+#include <signal.h>
 #include <stdint.h>
+#include <stdlib.h>
+#include <stddef.h>
 #include <string.h>
 #include <unistd.h>
-#include <signal.h>
-#include <errno.h>
 
 #include <arpa/inet.h>
-#include <sys/socket.h>
 #include <netinet/in.h>
+#include <sys/socket.h>
 
 #ifndef PACKAGE_NAME
 #define PACKAGE_NAME "glorytun"
@@ -23,55 +24,49 @@
 #define PACKAGE_VERSION "0.0.0"
 #endif
 
-#define COUNT(x)       (sizeof(x)/sizeof(x[0]))
+#define COUNT(x) (sizeof(x) / sizeof(x[0]))
 
-#define ALIGN_SIZE     (1<<4)
-#define ALIGN_MASK     (ALIGN_SIZE-1)
+#define _1_(x) (__builtin_expect((x), 1))
+#define _0_(x) (__builtin_expect((x), 0))
+#define CLZ(x) (__builtin_clz(x))
 
-#define ALIGN(x)       (((x)+ALIGN_MASK)&~ALIGN_MASK)
-#define ALIGN_DOWN(x)  ((x)&~ALIGN_MASK)
-
-#define PALIGN(x)      ((void *)ALIGN((size_t)(x)))
-#define PALIGN_DOWN(x) ((void *)ALIGN_DOWN((size_t)(x)))
-
-#define _1_(x)         (__builtin_expect((x), 1))
-#define _0_(x)         (__builtin_expect((x), 0))
-
-#define CLZ(x)         (__builtin_clz(x))
-
-#define _printf_(A,B)  __attribute__ ((format(printf,A,B)))
-#define _noreturn_     __attribute__ ((noreturn))
-#define _unused_       __attribute__ ((unused))
-#define _pure_         __attribute__ ((pure))
-#define _const_        __attribute__ ((const))
-#define _align_(...)   __attribute__ ((aligned(__VA_ARGS__)))
+#define _printf_(A, B) __attribute__((format(printf, A, B)))
+#define _noreturn_     __attribute__((noreturn))
+#define _unused_       __attribute__((unused))
+#define _pure_         __attribute__((pure))
+#define _const_        __attribute__((const))
+#define _align_(...)   __attribute__((aligned(__VA_ARGS__)))
 
 #undef MAX
-#define MAX(x,y) ({ __typeof__(x) X=(x); __typeof__(y) Y=(y); X > Y ? X : Y; })
+#define MAX(x, y) ({ __typeof__(x) X=(x); __typeof__(y) Y=(y); X > Y ? X : Y; })
 
 #undef MIN
-#define MIN(x,y) ({ __typeof__(x) X=(x); __typeof__(y) Y=(y); X < Y ? X : Y; })
+#define MIN(x, y) ({ __typeof__(x) X=(x); __typeof__(y) Y=(y); X < Y ? X : Y; })
 
-#define GT_CIPHER(x)  ((x) ? "chacha20poly1305" : "aegis256")
+#define EMPTY(x) ({ __typeof__(x) X=(x); !X || !X[0]; })
+
+#define GT_CIPHER(x) ((x) ? "chacha20poly1305" : "aegis256")
 
 extern volatile sig_atomic_t gt_alarm;
 extern volatile sig_atomic_t gt_reload;
 extern volatile sig_atomic_t gt_quit;
 
-int  gt_print (const char *, ...) _printf_(1,2);
-void gt_log   (const char *, ...) _printf_(1,2);
+int  gt_print (const char *, ...) _printf_(1, 2);
+void gt_log   (const char *, ...) _printf_(1, 2);
 
 int gt_tohex   (char *, size_t, const uint8_t *, size_t);
 int gt_fromhex (uint8_t *, size_t, const char *, size_t);
 
 void     gt_set_port (struct sockaddr *, uint16_t);
 uint16_t gt_get_port (struct sockaddr *);
-int      gt_toaddr   (char *, size_t, struct sockaddr *);
 
-int gt_list   (int, char **);
-int gt_show   (int, char **);
-int gt_bind   (int, char **);
-int gt_path   (int, char **);
-int gt_keygen (int, char **);
-int gt_bench  (int, char **);
-int gt_set    (int, char **);
+int gt_toaddr (char *, size_t, struct sockaddr *);
+
+int gt_list    (int, char **);
+int gt_show    (int, char **);
+int gt_bind    (int, char **);
+int gt_path    (int, char **);
+int gt_keygen  (int, char **);
+int gt_bench   (int, char **);
+int gt_set     (int, char **);
+int gt_version (int, char **);
diff --git a/src/ctl.c b/src/ctl.c
index ee01ccc..f11c92b 100644
--- a/src/ctl.c
+++ b/src/ctl.c
@@ -1,13 +1,9 @@
-#include "common.h"
 #include "ctl.h"
-#include "str.h"
+#include "common.h"
 
-#include <stdio.h>
-#include <unistd.h>
 #include <dirent.h>
 #include <libgen.h>
-#include <sys/socket.h>
-#include <sys/types.h>
+#include <stdio.h>
 #include <sys/stat.h>
 #include <sys/un.h>
 
@@ -87,10 +83,10 @@ ctl_setsun(struct sockaddr_un *dst, const char *dir, const char *file)
 static int
 ctl_bind(int fd, const char *dir, const char *file)
 {
-    char name[10] = { [0] = '.' };
+    char name[10] = {[0] = '.'};
     struct sockaddr_un sun;
 
-    if (str_empty(file)) {
+    if (EMPTY(file)) {
         unsigned pid = (unsigned)getpid();
 
         for (size_t i = 1; i < sizeof(name) - 1; i++, pid >>= 4)
@@ -111,7 +107,7 @@ ctl_bind(int fd, const char *dir, const char *file)
 void
 ctl_delete(int fd)
 {
-    struct sockaddr_storage ss = { 0 };
+    struct sockaddr_storage ss = {0};
     socklen_t sslen = sizeof(ss);
 
     if ((getsockname(fd, (struct sockaddr *)&ss, &sslen) == 0) &&
diff --git a/src/iface.c b/src/iface.c
index a0644d9..8862877 100644
--- a/src/iface.c
+++ b/src/iface.c
@@ -1,8 +1,8 @@
-#include "common.h"
 #include "iface.h"
+#include "common.h"
 
-#include <stdio.h>
 #include <net/if.h>
+#include <stdio.h>
 #include <sys/ioctl.h>
 
 int
diff --git a/src/iface.h b/src/iface.h
index 6066d24..0d64c09 100644
--- a/src/iface.h
+++ b/src/iface.h
@@ -1,3 +1,5 @@
 #pragma once
 
+#include <stddef.h>
+
 int iface_set_mtu (const char *, size_t);
diff --git a/src/list.c b/src/list.c
index 688a7b6..6fcae48 100644
--- a/src/list.c
+++ b/src/list.c
@@ -3,10 +3,8 @@
 
 #include "../argz/argz.h"
 
-#include <stdio.h>
 #include <dirent.h>
-#include <unistd.h>
-#include <sys/un.h>
+#include <stdio.h>
 
 int
 gt_list(int argc, char **argv)
diff --git a/src/main.c b/src/main.c
index a3b44a8..ae56505 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,7 +1,5 @@
 #include "common.h"
-#include "str.h"
 
-#include <sodium.h>
 #include <stdio.h>
 
 #include "../argz/argz.h"
@@ -46,28 +44,6 @@ gt_set_signal(void)
     sigaction(SIGUSR2, &sa, NULL);
 }
 
-static int
-gt_version(int argc, char **argv)
-{
-    struct argz version_argz[] = {
-        {"libsodium", NULL, NULL, argz_option},
-        {NULL}};
-
-    if (argz(version_argz, argc, argv))
-        return 1;
-
-    if (argz_is_set(version_argz, "libsodium")) {
-        printf("%i.%i (%s)\n",
-                sodium_library_version_major(),
-                sodium_library_version_minor(),
-                sodium_version_string());
-    } else {
-        printf("%s\n", PACKAGE_VERSION);
-    }
-
-    return 0;
-}
-
 int
 main(int argc, char **argv)
 {
@@ -90,7 +66,7 @@ main(int argc, char **argv)
 
     if (argv[1]) {
         for (int k = 0; cmd[k].name; k++) {
-            if (!str_cmp(cmd[k].name, argv[1]))
+            if (!strcmp(cmd[k].name, argv[1]))
                 return cmd[k].call(argc - 1, argv + 1);
         }
     }
@@ -100,10 +76,10 @@ main(int argc, char **argv)
     int len = 0;
 
     for (int k = 0; cmd[k].name; k++)
-        len = MAX(len, (int)str_len(cmd[k].name, 32));
+        len = MAX(len, (int)strlen(cmd[k].name));
 
     for (int k = 0; cmd[k].name; k++)
-        printf("  %-*s  %s\n", len, cmd[k].name, cmd[k].help);
+        printf("    %-*s    %s\n", len, cmd[k].name, cmd[k].help);
 
     printf("\n");
 
diff --git a/src/path.c b/src/path.c
index 6e79f03..8cb098f 100644
--- a/src/path.c
+++ b/src/path.c
@@ -1,10 +1,7 @@
 #include "common.h"
 #include "ctl.h"
-#include "str.h"
 
 #include <stdio.h>
-#include <sys/socket.h>
-#include <unistd.h>
 
 #include "../argz/argz.h"
 
diff --git a/src/set.c b/src/set.c
index e99a8e8..b886245 100644
--- a/src/set.c
+++ b/src/set.c
@@ -1,9 +1,7 @@
 #include "common.h"
 #include "ctl.h"
-#include "str.h"
 
 #include <stdio.h>
-#include <sys/socket.h>
 
 #include "../argz/argz.h"
 
diff --git a/src/show.c b/src/show.c
index 7e1a21b..3c76984 100644
--- a/src/show.c
+++ b/src/show.c
@@ -1,15 +1,9 @@
 #include "common.h"
 #include "ctl.h"
-#include "str.h"
 
 #include "../argz/argz.h"
 
 #include <stdio.h>
-#include <sys/socket.h>
-#include <dirent.h>
-#include <sys/un.h>
-#include <arpa/inet.h>
-#include <unistd.h>
 
 static void
 gt_show_bad_line(int term, char *name, uint64_t count,
diff --git a/src/str.h b/src/str.h
deleted file mode 100644
index b012277..0000000
--- a/src/str.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#pragma once
-
-#include "common.h"
-
-_pure_ static inline int
-str_empty(const char *restrict str)
-{
-    return !str || !str[0];
-}
-
-_pure_ static inline size_t
-str_cmp(const char *restrict sa, const char *restrict sb)
-{
-    if (!sa || !sb)
-        return 1;
-
-    size_t i = 0;
-
-    while (sa[i] == sb[i])
-        if (!sa[i++])
-            return 0;
-
-    return i + 1;
-}
-
-_pure_ static inline size_t
-str_len(const char *restrict str, size_t len)
-{
-    if (!str)
-        return 0;
-
-    return strnlen(str, len);
-}
diff --git a/src/tun.c b/src/tun.c
index 6b9a7de..0b25709 100644
--- a/src/tun.c
+++ b/src/tun.c
@@ -1,14 +1,13 @@
+#include "tun.h"
 #include "common.h"
 #include "ip.h"
-#include "str.h"
-#include "tun.h"
 
 #include <fcntl.h>
+#include <net/if.h>
 #include <stdio.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
 #include <sys/uio.h>
-#include <net/if.h>
 
 #ifdef __linux__
 #define IFF_TUN 0x0001
@@ -172,7 +171,7 @@ tun_create(char *name, size_t len, const char *dev_name)
 {
     int fd = -1;
 
-    if (str_empty(dev_name)) {
+    if (EMPTY(dev_name)) {
         for (unsigned id = 0; id < 32 && fd == -1; id++)
             fd = tun_create_by_id(name, len, id);
     } else {
diff --git a/src/tun.h b/src/tun.h
index 2b4aa70..d020098 100644
--- a/src/tun.h
+++ b/src/tun.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <stddef.h>
+
 int tun_create      (char *, size_t, const char *);
 int tun_read        (int, void *, size_t);
 int tun_write       (int, const void *, size_t);
diff --git a/src/version.c b/src/version.c
new file mode 100644
index 0000000..523942c
--- /dev/null
+++ b/src/version.c
@@ -0,0 +1,27 @@
+#include "common.h"
+
+#include <sodium.h>
+
+#include "../argz/argz.h"
+
+int
+gt_version(int argc, char **argv)
+{
+    struct argz version_argz[] = {
+        {"libsodium", NULL, NULL, argz_option},
+        {NULL}};
+
+    if (argz(version_argz, argc, argv))
+        return 1;
+
+    if (argz_is_set(version_argz, "libsodium")) {
+        printf("%i.%i (%s)\n",
+               sodium_library_version_major(),
+               sodium_library_version_minor(),
+               sodium_version_string());
+    } else {
+        printf("%s\n", PACKAGE_VERSION);
+    }
+
+    return 0;
+}