Version 0.0.8

configure.ac

@@ -1,5 +1,5 @@
 AC_PREREQ([2.65])
-AC_INIT([glorytun], [0.0.5], [https://github.com/angt/glorytun/issues],
+AC_INIT([glorytun], [0.0.8], [https://github.com/angt/glorytun/issues],
         [glorytun], [https://github.com/angt/glorytun])
 AC_CONFIG_SRCDIR([src/common.h])
 AC_CONFIG_AUX_DIR([build-aux])

src/common.h

@@ -14,9 +14,13 @@
 #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 _printf_(A,B)  __attribute__((format(printf,A,B)))
 #define _noreturn_     __attribute__((noreturn))
 #define _unused_       __attribute__((unused))
+#define _align_(...)   __attribute__((aligned(__VA_ARGS__)))
 
 typedef struct buffer buffer_t;
 

src/ip-static.h

@@ -28,3 +28,12 @@ static inline ssize_t ip_get_size (const uint8_t *data, size_t size)
     return 0;
 }
 
+static inline int ip_get_dscp (const uint8_t *data, size_t size)
+{
+    switch (ip_get_version(data, size)) {
+    case 4:
+        return data[1]>>2;
+    }
+
+    return 0;
+}

src/main.c

@@ -22,8 +22,11 @@
 #define O_CLOEXEC 0
 #endif
 
-#define GT_BUFFER_SIZE (4*1024*1024)
-#define GT_TIMEOUT     (1000)
+#define GT_BUFFER_SIZE  (4*1024*1024)
+#define GT_TIMEOUT      (1000)
+#define GT_MTU_MAX      (1500)
+#define GT_TUNR_SIZE    (0x7FFF-16)
+#define GT_TUNW_SIZE    (0x7FFF)
 
 struct fdbuf {
     int fd;
@@ -31,6 +34,11 @@ struct fdbuf {
     buffer_t write;
 };
 
+struct blk {
+    size_t size;
+    uint8_t data[GT_MTU_MAX] _align_(16);
+};
+
 struct crypto_ctx {
     struct {
         crypto_aead_aes256gcm_state state;
@@ -75,6 +83,7 @@ enum sk_opt {
     sk_keepintvl,
     sk_congestion,
     sk_defer_accept,
+    sk_quickack,
 };
 
 static void sk_set (int fd, enum sk_opt opt, const void *val, socklen_t len)
@@ -114,6 +123,11 @@ static void sk_set (int fd, enum sk_opt opt, const void *val, socklen_t len)
         [sk_defer_accept] = { "TCP_DEFER_ACCEPT",
 #ifdef TCP_DEFER_ACCEPT
             1, IPPROTO_TCP, TCP_DEFER_ACCEPT,
+#endif
+        },
+        [sk_quickack] = { "TCP_QUICKACK",
+#ifdef TCP_QUICKACK
+            1, IPPROTO_TCP, TCP_QUICKACK,
 #endif
         },
     };
@@ -655,6 +669,7 @@ int main (int argc, char **argv)
         { "multiqueue",  NULL,         option_option },
         { "keepalive",   ka_opts,      option_option },
         { "buffer-size", &buffer_size, option_long   },
+        { "noquickack",  NULL,         option_option },
         { "daemon",      NULL,         option_option },
         { "debug",       NULL,         option_option },
         { "version",     NULL,         option_option },
@@ -673,6 +688,7 @@ int main (int argc, char **argv)
     int delay = option_is_set(opts, "delay");
     int debug = option_is_set(opts, "debug");
     int keepalive = option_is_set(opts, "keepalive");
+    int noquickack = option_is_set(opts, "noquickack");
 
     if (buffer_size < 2048) {
         buffer_size = 2048;
@@ -707,13 +723,21 @@ int main (int argc, char **argv)
     if (tun.fd==-1)
         return 1;
 
+    struct blk *blks = calloc(256, sizeof(struct blk));
+    size_t blk_count = 0;
+    uint8_t blk_read = 0;
+    uint8_t blk_write = 0;
+
+    if (!blks)
+        return 1;
+
     fd_set_nonblock(tun.fd);
 
-    buffer_setup(&tun.write, NULL, 32*1024);
-    buffer_setup(&tun.read, NULL, 32*1024);
+    buffer_setup(&tun.write, NULL, GT_TUNW_SIZE);
+    buffer_setup(&tun.read,  NULL, GT_TUNR_SIZE);
 
     buffer_setup(&sock.write, NULL, buffer_size);
-    buffer_setup(&sock.read, NULL, buffer_size);
+    buffer_setup(&sock.read,  NULL, buffer_size);
 
     int fd = -1;
 
@@ -743,13 +767,15 @@ int main (int argc, char **argv)
 
         if (sock.fd==-1) {
             usleep(100000);
-            goto restart;
+            continue;
         }
 
         char *sockname = sk_get_name(sock.fd);
 
-        if (!sockname)
-            goto restart;
+        if (!sockname) {
+            close(sock.fd);
+            continue;
+        }
 
         gt_log("%s: connected\n", sockname);
 
@@ -801,7 +827,7 @@ int main (int argc, char **argv)
 
             FD_SET(sock.fd, &rfds);
 
-            if (buffer_read_size(&tun.read))
+            if (buffer_read_size(&tun.read) || blk_count)
                 FD_SET(sock.fd, &wfds);
 
             if (buffer_read_size(&sock.read))
@@ -828,16 +854,10 @@ int main (int argc, char **argv)
             }
 #endif
 
-            buffer_shift(&tun.read);
-
             if (FD_ISSET(tun.fd, &rfds)) {
-                while (1) {
-                    size_t size = buffer_write_size(&tun.read);
-
-                    if (size<1500)
-                        break;
-
-                    ssize_t r = tun_read(tun.fd, tun.read.write, size);
+                while (!blks[blk_write].size) {
+                    uint8_t *data = blks[blk_write].data;
+                    ssize_t r = tun_read(tun.fd, data, GT_MTU_MAX);
 
                     if (!r)
                         return 2;
@@ -845,25 +865,44 @@ int main (int argc, char **argv)
                     if (r<0)
                         break;
 
-                    ssize_t ip_size = ip_get_size(tun.read.write, size);
+                    ssize_t ip_size = ip_get_size(data, GT_MTU_MAX);
 
                     if (ip_size<=0)
                         continue;
 
                     if (ip_size!=r) {
-                        dump_ip_header(tun.read.write, r);
+                        dump_ip_header(data, r);
 
                         if (r<ip_size) {
-                            ip_set_size(tun.read.write, r);
+                            ip_set_size(data, r);
                         } else {
                             continue;
                         }
                     }
 
-                    tun.read.write += r;
+                    blks[blk_write++].size = r;
+                    blk_count++;
                 }
             }
 
+            buffer_shift(&tun.read);
+
+            while (blk_count) {
+                if (!blks[blk_read].size) {
+                    blk_read++;
+                    continue;
+                }
+
+                if (buffer_write_size(&tun.read)<blks[blk_read].size)
+                    break;
+
+                byte_cpy(tun.read.write, blks[blk_read].data, blks[blk_read].size);
+                tun.read.write += blks[blk_read].size;
+
+                blks[blk_read++].size = 0;
+                blk_count--;
+            }
+
             gt_encrypt(&ctx, &sock.write, &tun.read);
 
             if (buffer_read_size(&sock.write)) {
@@ -879,7 +918,8 @@ int main (int argc, char **argv)
                 if (r>0)
                     sock.write.read += r;
             } else {
-                if (stop_loop) {
+                if (stop_loop && !(stop_loop>>2)) {
+                    stop_loop |= (1<<2);
                     gt_log("%s: shutdown\n", sockname);
                     shutdown(sock.fd, SHUT_WR);
                 }
@@ -889,6 +929,9 @@ int main (int argc, char **argv)
             buffer_shift(&sock.read);
 
             if (FD_ISSET(sock.fd, &rfds)) {
+                if (noquickack)
+                    sk_set_int(sock.fd, sk_quickack, 0);
+
                 ssize_t r = fd_read(sock.fd, sock.read.write,
                                     buffer_write_size(&sock.read));
 
@@ -899,12 +942,12 @@ int main (int argc, char **argv)
                     sock.read.write += r;
             }
 
-            if (gt_decrypt(&ctx, &tun.write, &sock.read)) {
-                gt_log("%s: message could not be verified!\n", sockname);
-                goto restart;
-            }
-
             while (1) {
+                if (gt_decrypt(&ctx, &tun.write, &sock.read)) {
+                    gt_log("%s: message could not be verified!\n", sockname);
+                    goto restart;
+                }
+
                 size_t size = buffer_read_size(&tun.write);
                 ssize_t ip_size = ip_get_size(tun.write.read, size);
 
@@ -945,8 +988,13 @@ int main (int argc, char **argv)
 
     freeaddrinfo(ai);
 
+    free(blks);
+
     free(sock.write.data);
     free(sock.read.data);
 
+    free(tun.write.data);
+    free(tun.read.data);
+
     return 0;
 }

src/option.c

@@ -97,7 +97,7 @@ static int option_usage (struct option *opts, int slen)
     int len = slen;
 
     for (int k=0; opts[k].name; k++) {
-        if (len>60) {
+        if (len>slen+40) {
             gt_print("\n%*s", (int)slen, "");
             len = slen;
         }
@@ -130,8 +130,10 @@ int option (struct option *opts, int argc, char **argv)
 
     int slen = gt_print("usage: %s", argv[0]);
 
-    if (slen>40)
+    if (slen>40) {
         slen = 12;
+        gt_print("\n%*s", (int)slen, "");
+    }
 
     option_usage(opts, slen);