Add mptcp option

.gitignore

@@ -11,5 +11,3 @@ build-aux
 .deps
 .dirstamp
 glorytun
-build*
-VERSION

.gitmodules

@@ -1,6 +0,0 @@
-[submodule "mud"]
-	path = mud
-	url = https://github.com/angt/mud.git
-[submodule "argz"]
-	path = argz
-	url = https://github.com/angt/argz.git

Makefile.am

@@ -5,35 +5,24 @@ bin_PROGRAMS = glorytun
 glorytun_CFLAGS = $(libsodium_CFLAGS)
 glorytun_LDADD = $(libsodium_LIBS)
 glorytun_SOURCES = \
-    argz/argz.c \
-    argz/argz.h \
-    mud/mud.c \
-    mud/mud.h \
-    src/bench.c \
-    src/bind.c \
-    src/common.c \
     src/common.h \
-    src/ctl.c \
-    src/ctl.h \
-    src/iface.c \
-    src/iface.h \
+    src/common.c \
+    src/buffer.h \
     src/ip.h \
-    src/keygen.c \
-    src/main.c \
-    src/path.c \
-    src/set.c \
-    src/show.c \
     src/str.h \
+    src/main.c \
+    src/option.c \
+    src/option.h \
     src/tun.c \
-    src/tun.h
+    src/tun.h \
+    src/db.c \
+    src/db.h \
+    src/state.c \
+    src/state.h
 
 EXTRA_DIST = \
     LICENSE \
     README.md \
     VERSION \
     autogen.sh \
-    meson.build \
-    mud/LICENSE \
-    mud/README.md \
-    systemd \
     version.sh

README.md

@@ -1,55 +1,23 @@
 # Glorytun
 
-Small, Simple and Stupid VPN over [mud](https://github.com/angt/mud).
+Small, Simple and Stupid TCP VPN.
 
-### Build and Install
+#### Work In Progress
 
-Glorytun depends on [libsodium](https://github.com/jedisct1/libsodium) version >= 1.0.4.
+This code will probably format your harddisk!
 
-On Ubuntu, the following command should be sufficient:
+#### Build and Install
 
-    $ sudo apt-get install meson libsodium-dev pkg-config
+Glorytun depends on [libsodium](https://github.com/jedisct1/libsodium) version >= 1.0.4
+and needs an AES-NI capable CPU.
 
-Grab the latest release from github:
+To build and install the latest version:
 
-    $ git clone https://github.com/angt/glorytun --recursive
+    $ git clone https://github.com/angt/glorytun
     $ cd glorytun
-
-To build and install the latest version with [meson](http://mesonbuild.com):
-
-    $ meson build
-    $ sudo ninja -C build install
-
-The more classical autotools suite is also available.
-
-### Easy setup with systemd
-
-Just call `glorytun-setup` and follow the instructions.
-
-First, setup the server:
-
-    $ sudo glorytun-setup
-    Config filename (tun0):
-    Server ip (enter for server conf):
-    Bind to port (5000):
-    Server key (enter to generate a new one):
-    Your new key: NEW_KEY
-    Start glorytun now ? (enter to skip): y
-
-Copy the new generated key and use it when configuring the client:
-
-    $ sudo glorytun-setup
-    Config filename (tun0):
-    Server ip (enter for server conf): SERVER_IP
-    Server port (5000):
-    Server key (enter to generate a new one): NEW_KEY
-    Start glorytun now ? (enter to skip): y
-
-You can check easily if it works by looking at your public ip.
-To stop the service:
-
-    $ sudo systemctl stop glorytun@tun0
-
----
+    $ ./autogen.sh
+    $ ./configure
+    $ make
+    # make install
 
 For feature requests and bug reports, please create an [issue](https://github.com/angt/glorytun/issues).

configure.ac

@@ -8,16 +8,14 @@ AC_DEFINE_UNQUOTED([VERSION_MAJOR], [m4_esyscmd([./version.sh major])])
 AC_CONFIG_SRCDIR([src/common.h])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
-AM_INIT_AUTOMAKE([1.12 -Wall -Werror foreign tar-ustar subdir-objects])
+AM_INIT_AUTOMAKE([1.9 -Wall -Werror foreign tar-ustar subdir-objects])
 AM_DEP_TRACK
 AM_SILENT_RULES([yes])
 AM_PROG_CC_C_O
 AC_PROG_CC_C99
 AC_USE_SYSTEM_EXTENSIONS
+AC_SEARCH_LIBS([getaddrinfo], [resolv nsl])
 AC_SEARCH_LIBS([socket], [socket])
-AC_SEARCH_LIBS([fmin], [m])
-AC_CHECK_LIB([rt], [clock_gettime])
-AC_CHECK_FUNCS([clock_gettime])
 PKG_CHECK_MODULES([libsodium], [libsodium >= 1.0.4])
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT

m4/pkg.m4

@@ -1,6 +1,6 @@
-# pkg.m4 - Macros to locate and utilise pkg-config.   -*- Autoconf -*-
-# serial 12 (pkg-config-0.29.2)
-
+dnl pkg.m4 - Macros to locate and utilise pkg-config.   -*- Autoconf -*-
+dnl serial 11 (pkg-config-0.29)
+dnl
 dnl Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
 dnl Copyright © 2012-2015 Dan Nicholson <dbn.lists@gmail.com>
 dnl
@@ -41,7 +41,7 @@ dnl
 dnl See the "Since" comment for each macro you use to see what version
 dnl of the macros you require.
 m4_defun([PKG_PREREQ],
-[m4_define([PKG_MACROS_VERSION], [0.29.2])
+[m4_define([PKG_MACROS_VERSION], [0.29])
 m4_if(m4_version_compare(PKG_MACROS_VERSION, [$1]), -1,
     [m4_fatal([pkg.m4 version $1 or higher is required but ]PKG_MACROS_VERSION[ found])])
 ])dnl PKG_PREREQ
@@ -142,7 +142,7 @@ AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
 AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
 
 pkg_failed=no
-AC_MSG_CHECKING([for $2])
+AC_MSG_CHECKING([for $1])
 
 _PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
 _PKG_CONFIG([$1][_LIBS], [libs], [$2])

meson.build

@@ -1,62 +0,0 @@
-project('glorytun', 'c',
-    version: run_command('./version.sh').stdout(),
-    license: 'BSD-3-Clause',
-    default_options : [
-      'buildtype=debugoptimized',
-      'c_std=gnu99'
-    ]
-)
-
-cc = meson.get_compiler('c')
-
-prefix = get_option('prefix')
-bindir = join_paths(prefix, get_option('bindir'))
-
-conf_data = configuration_data()
-conf_data.set('prefix', prefix)
-conf_data.set('bindir', bindir)
-
-add_global_arguments('-DPACKAGE_VERSION="'+meson.project_version()+'"', language : 'c')
-add_global_arguments('-DPACKAGE_NAME="'+meson.project_name()+'"', language : 'c')
-
-executable('glorytun', install: true,
-  sources: [
-    'argz/argz.c',
-    'mud/mud.c',
-    'src/bench.c',
-    'src/bind.c',
-    'src/common.c',
-    'src/ctl.c',
-    'src/iface.c',
-    'src/keygen.c',
-    'src/main.c',
-    'src/path.c',
-    'src/set.c',
-    'src/show.c',
-    'src/tun.c',
-  ],
-  dependencies: [
-    dependency('libsodium', version : '>=1.0.4'),
-    cc.find_library('m', required : false)
-  ]
-)
-
-systemd = dependency('systemd', required: false)
-
-if systemd.found()
-  systemdutildir = systemd.get_pkgconfig_variable('systemdutildir')
-  configure_file(
-      input: 'systemd/glorytun@.service.in',
-      output: 'glorytun@.service',
-      configuration: conf_data,
-      install_dir: join_paths(systemdutildir, 'system')
-  )
-  install_data('systemd/glorytun.network',
-      install_dir: join_paths(systemdutildir, 'network'))
-  install_data('systemd/glorytun-client.network',
-      install_dir: join_paths(systemdutildir, 'network'))
-  install_data('systemd/glorytun-run',
-      install_dir: bindir)
-  install_data('systemd/glorytun-setup',
-      install_dir: bindir)
-endif

src/bench.c

@@ -1,159 +0,0 @@
-#include "common.h"
-
-#include <math.h>
-#include <sodium.h>
-#include <string.h>
-#include <stdio.h>
-#include <sys/time.h>
-#include <time.h>
-#include <unistd.h>
-
-#if defined __APPLE__
-#include <mach/mach_time.h>
-#endif
-
-#include "../argz/argz.h"
-
-#define STR_S(X) (((X) > 1) ? "s" : "")
-
-static unsigned long long
-gt_now(void)
-{
-#if defined __APPLE__
-    static mach_timebase_info_data_t mtid;
-    if (!mtid.denom)
-        mach_timebase_info(&mtid);
-    return (mach_absolute_time() * mtid.numer / mtid.denom) / 1000ULL;
-#elif defined CLOCK_MONOTONIC
-    struct timespec tv;
-    clock_gettime(CLOCK_MONOTONIC, &tv);
-    return tv.tv_sec * 1000000ULL + tv.tv_nsec / 1000ULL;
-#else
-    struct timeval tv;
-    gettimeofday(&tv, NULL);
-    return tv.tv_sec * 1000000ULL + tv.tv_usec;
-#endif
-}
-
-int
-gt_bench(int argc, char **argv)
-{
-    unsigned long precision = 10;
-    size_t bufsize = 64 * 1024;
-    unsigned long duration = 1000;
-
-    struct argz bench_argz[] = {
-        {"aes|chacha", NULL, NULL, argz_option},
-        {"precision", "EXPONENT", &precision, argz_ulong},
-        {"bufsize", "BYTES", &bufsize, argz_bytes},
-        {"duration", "SECONDS", &duration, argz_time},
-        {NULL}};
-
-    if (argz(bench_argz, argc, argv))
-        return 1;
-
-    if (duration == 0 || bufsize == 0)
-        return 0;
-
-    if (sodium_init() == -1) {
-        gt_log("sodium init failed\n");
-        return 1;
-    }
-
-    duration /= 1000;
-
-    int term = isatty(1);
-    int chacha = argz_is_set(bench_argz, "chacha");
-
-    if (!chacha && !crypto_aead_aes256gcm_is_available()) {
-        gt_log("aes is not available on your platform\n");
-        return 1;
-    }
-
-    unsigned char *buf = calloc(1, bufsize + crypto_aead_aes256gcm_ABYTES);
-
-    if (!buf) {
-        perror("calloc");
-        return 1;
-    }
-
-    unsigned char npub[crypto_aead_aes256gcm_NPUBBYTES];
-    unsigned char key[crypto_aead_aes256gcm_KEYBYTES];
-
-    randombytes_buf(npub, sizeof(npub));
-    randombytes_buf(key, sizeof(key));
-
-    if (term) {
-        printf("\n");
-        printf("  %-10s %s\n", "bench", chacha ? "chacha20poly1305" : "aes256gcm");
-        printf("  %-10s %s\n", "libsodium", sodium_version_string());
-        printf("\n");
-        printf("  %-10s 2^(-%lu)\n", "precision", precision);
-        printf("  %-10s %zu byte%s\n", "bufsize", bufsize, STR_S(bufsize));
-        printf("  %-10s %lu second%s\n", "duration", duration, STR_S(duration));
-        printf("\n");
-        printf("------------------------------------------------------------\n");
-        printf(" %3s %9s %14s %14s %14s\n", "2^n", "min", "avg", "max", "delta");
-        printf("------------------------------------------------------------\n");
-    }
-
-    for (int i = 0; !gt_quit && bufsize >> i; i++) {
-        unsigned long long total_dt = 0ULL;
-        size_t total_bytes = 0;
-        double mbps = 0.0;
-        double mbps_min = INFINITY;
-        double mbps_max = 0.0;
-        double mbps_dlt = INFINITY;
-
-        while (!gt_quit && mbps_dlt > ldexp(mbps, -precision)) {
-            crypto_aead_aes256gcm_state ctx;
-
-            if (!chacha)
-                crypto_aead_aes256gcm_beforenm(&ctx, key);
-
-            unsigned long long now = gt_now();
-            double mbps_old = mbps;
-            size_t bytes = 0;
-
-            gt_alarm = 0;
-            alarm(duration);
-
-            while (!gt_quit && !gt_alarm) {
-                if (chacha) {
-                    crypto_aead_chacha20poly1305_encrypt(
-                        buf, NULL, buf, 1ULL << i, NULL, 0, NULL, npub, key);
-                } else {
-                    crypto_aead_aes256gcm_encrypt_afternm(
-                        buf, NULL, buf, 1ULL << i, NULL, 0, NULL, npub,
-                        (const crypto_aead_aes256gcm_state *)&ctx);
-                }
-                bytes += 1ULL << i;
-            }
-
-            total_dt += gt_now() - now;
-            total_bytes += bytes;
-
-            mbps = (total_bytes * 8.0) / total_dt;
-            mbps_min = fmin(mbps_min, mbps);
-            mbps_max = fmax(mbps_max, mbps);
-            mbps_dlt = fabs(mbps_old - mbps);
-
-            if (term) {
-                printf("\r %3i %9.2f Mbps %9.2f Mbps %9.2f Mbps %9.2e",
-                       i, mbps_min, mbps, mbps_max, mbps_dlt);
-                fflush(stdout);
-            }
-        }
-
-        if (term) {
-            printf("\n");
-        } else {
-            printf("%i %.2f %.2f %.2f\n", i, mbps_min, mbps, mbps_max);
-        }
-    }
-
-    printf("\n");
-    free(buf);
-
-    return 0;
-}

src/bind.c

@@ -1,396 +0,0 @@
-#include "common.h"
-#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"
-#include "../mud/mud.h"
-
-#ifndef O_CLOEXEC
-#define O_CLOEXEC 0
-#endif
-
-static void
-fd_set_nonblock(int fd)
-{
-    int ret;
-
-    if (fd == -1)
-        return;
-
-    do {
-        ret = fcntl(fd, F_GETFL, 0);
-    } while (ret == -1 && errno == EINTR);
-
-    int flags = (ret == -1) ? 0 : ret;
-
-    do {
-        ret = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
-    } while (ret == -1 && errno == EINTR);
-
-    if (ret == -1)
-        perror("fcntl O_NONBLOCK");
-}
-
-static int
-gt_setup_secretkey(struct mud *mud, const char *keyfile)
-{
-    int fd;
-
-    do {
-        fd = open(keyfile, O_RDONLY | O_CLOEXEC);
-    } while (fd == -1 && errno == EINTR);
-
-    if (fd == -1) {
-        perror("open keyfile");
-        return -1;
-    }
-
-    unsigned char key[32];
-    char buf[2 * sizeof(key)];
-    size_t size = 0;
-
-    while (size < sizeof(buf)) {
-        ssize_t r = read(fd, &buf[size], sizeof(buf) - size);
-
-        if (r <= (ssize_t)0) {
-            if (r && (errno == EAGAIN || errno == EINTR))
-                continue;
-            break;
-        }
-
-        size += r;
-    }
-
-    close(fd);
-
-    if (size != sizeof(buf)) {
-        gt_log("unable to read secret key\n");
-        return -1;
-    }
-
-    if (gt_fromhex(key, sizeof(key), buf, sizeof(buf))) {
-        gt_log("secret key is not valid\n");
-        return -1;
-    }
-
-    mud_set_key(mud, key, sizeof(key));
-
-    return 0;
-}
-
-static size_t
-gt_setup_mtu(struct mud *mud, const char *tun_name)
-{
-    static size_t oldmtu = 0;
-    size_t mtu = mud_get_mtu(mud);
-
-    if (mtu == oldmtu)
-        return mtu;
-
-    gt_log("setup MTU to %zu on interface %s\n", mtu, tun_name);
-
-    if (iface_set_mtu(tun_name, mtu) == -1)
-        perror("tun_set_mtu");
-
-    oldmtu = mtu;
-
-    return mtu;
-}
-
-int
-gt_bind(int argc, char **argv)
-{
-    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;
-    const char *keyfile = NULL;
-    size_t bufsize = 64 * 1024 * 1024;
-    size_t mtu = 1330;
-
-    struct argz toz[] = {
-        {NULL, "IPADDR", &peer_addr, argz_addr},
-        {NULL, "PORT", &peer_port, argz_ushort},
-        {NULL}};
-
-    struct argz bindz[] = {
-        {NULL, "IPADDR", &bind_addr, argz_addr},
-        {NULL, "PORT", &bind_port, argz_ushort},
-        {"to", NULL, &toz, argz_option},
-        {"dev", "NAME", &dev, argz_str},
-        {"mtu", "BYTES", &mtu, argz_bytes},
-        {"keyfile", "FILE", &keyfile, argz_str},
-        {"chacha", NULL, NULL, argz_option},
-        {"persist", NULL, NULL, argz_option},
-        {"bufsize", "BYTES", &bufsize, argz_bytes},
-        {NULL}};
-
-    if (argz(bindz, argc, argv))
-        return 1;
-
-    gt_set_port((struct sockaddr *)&bind_addr, bind_port);
-    gt_set_port((struct sockaddr *)&peer_addr, peer_port);
-
-    unsigned char *buf = malloc(bufsize);
-
-    if (!buf) {
-        perror("malloc");
-        return 1;
-    }
-
-    int chacha = argz_is_set(bindz, "chacha");
-    int persist = argz_is_set(bindz, "persist");
-
-    struct mud *mud = mud_create((struct sockaddr *)&bind_addr);
-
-    if (!mud) {
-        gt_log("couldn't create mud\n");
-        return 1;
-    }
-
-    if (str_empty(keyfile)) {
-        if (mud_set_key(mud, NULL, 0)) {
-            gt_log("couldn't generate a new key\n");
-            return 1;
-        }
-    } else {
-        if (gt_setup_secretkey(mud, keyfile))
-            return 1;
-    }
-
-    if (!chacha && mud_set_aes(mud)) {
-        gt_log("AES is not available\n");
-        chacha = 1;
-    }
-
-    char tun_name[64];
-    int tun_fd = tun_create(tun_name, sizeof(tun_name) - 1, dev);
-
-    if (tun_fd == -1) {
-        gt_log("couldn't create tun device\n");
-        return 1;
-    }
-
-    mud_set_mtu(mud, mtu);
-    mtu = gt_setup_mtu(mud, tun_name);
-
-    if (tun_set_persist(tun_fd, persist) == -1)
-        perror("tun_set_persist");
-
-    if (peer_addr.ss_family) {
-        if (mud_peer(mud, (struct sockaddr *)&peer_addr)) {
-            perror("mud_peer");
-            return 1;
-        }
-    }
-
-    int ctl_fd = ctl_create("/run/" PACKAGE_NAME, tun_name);
-
-    if (ctl_fd == -1) {
-        perror("ctl_create");
-        return 1;
-    }
-
-    int mud_fd = mud_get_fd(mud);
-
-    fd_set_nonblock(tun_fd);
-    fd_set_nonblock(mud_fd);
-    fd_set_nonblock(ctl_fd);
-
-    gt_log("running...\n");
-
-    fd_set rfds;
-    FD_ZERO(&rfds);
-
-    int last_fd = 1 + MAX(tun_fd, MAX(mud_fd, ctl_fd));
-
-    while (!gt_quit) {
-        FD_SET(tun_fd, &rfds);
-        FD_SET(mud_fd, &rfds);
-        FD_SET(ctl_fd, &rfds);
-
-        if (select(last_fd, &rfds, NULL, NULL, NULL) == -1) {
-            if (errno != EBADF)
-                continue;
-            perror("select");
-            return 1;
-        }
-
-        mtu = gt_setup_mtu(mud, tun_name);
-
-        if (FD_ISSET(ctl_fd, &rfds)) {
-            struct ctl_msg req, res = {.reply = 1};
-            struct sockaddr_storage ss;
-            socklen_t sl = sizeof(ss);
-
-            ssize_t r = recvfrom(ctl_fd, &req, sizeof(req), 0,
-                                 (struct sockaddr *)&ss, &sl);
-
-            if (r == (ssize_t)sizeof(req)) {
-                res.type = req.type;
-
-                switch (req.type) {
-                case CTL_NONE:
-                    break;
-                case CTL_STATE:
-                    if (mud_set_state(mud, (struct sockaddr *)&req.path.addr, req.path.state))
-                        res.ret = errno;
-                    break;
-                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)");
-                        }
-
-                        res.ret = 0;
-                    }
-                    break;
-                case CTL_MTU:
-                    mud_set_mtu(mud, (size_t)req.mtu);
-                    mtu = gt_setup_mtu(mud, tun_name);
-                    res.mtu = mtu;
-                    break;
-                case CTL_TC:
-                    if (mud_set_tc(mud, req.tc))
-                        res.ret = errno;
-                    break;
-                case CTL_TIMEOUT:
-                    if (mud_set_send_timeout(mud, req.timeout))
-                        res.ret = errno;
-                    break;
-                case CTL_TIMETOLERANCE:
-                    if (mud_set_time_tolerance(mud, req.timetolerance))
-                        res.ret = errno;
-                    break;
-                case CTL_STATUS:
-                    res.status.mtu = mtu;
-                    res.status.chacha = chacha;
-                    res.status.bind = bind_addr;
-                    res.status.peer = peer_addr;
-                    break;
-                }
-                if (sendto(ctl_fd, &res, sizeof(res), 0,
-                           (const struct sockaddr *)&ss, sl) == -1)
-                    perror("sendto(ctl)");
-            } else if (r == -1 && errno != EAGAIN) {
-                perror("recvfrom(ctl)");
-            }
-        }
-
-        if (FD_ISSET(tun_fd, &rfds)) {
-            size_t size = 0;
-
-            while (bufsize - size >= mtu) {
-                const int r = tun_read(tun_fd, &buf[size], bufsize - size);
-
-                if (r <= 0 || r > mtu)
-                    break;
-
-                struct ip_common ic;
-
-                if (ip_get_common(&ic, &buf[size], r) || ic.size != r)
-                    break;
-
-                size += r;
-            }
-
-            size_t p = 0;
-
-            while (p < size) {
-                size_t q = p;
-                int tc = 0;
-
-                while (q < size) {
-                    struct ip_common ic;
-
-                    if ((ip_get_common(&ic, &buf[q], size - q)) ||
-                        (ic.size > size - q))
-                        break;
-
-                    if (q + ic.size > p + mtu)
-                        break;
-
-                    q += ic.size;
-
-                    if (tc < (ic.tc & 0xFC))
-                        tc = ic.tc & 0xFC;
-                }
-
-                if (p >= q)
-                    break;
-
-                int r = mud_send(mud, &buf[p], q - p, tc);
-
-                if (r == -1) {
-                    if (errno == EMSGSIZE) {
-                        mtu = gt_setup_mtu(mud, tun_name);
-                    } else if (errno != EAGAIN) {
-                        perror("mud_send");
-                    }
-                }
-
-                p = q;
-            }
-        }
-
-        if (FD_ISSET(mud_fd, &rfds)) {
-            size_t size = 0;
-
-            while (bufsize - size >= mtu) {
-                const int r = mud_recv(mud, &buf[size], bufsize - size);
-
-                if (r <= 0) {
-                    if (r == -1 && errno != EAGAIN)
-                        perror("mud_recv");
-                    break;
-                }
-
-                size += r;
-            }
-
-            size_t p = 0;
-
-            while (p < size) {
-                struct ip_common ic;
-
-                if ((ip_get_common(&ic, &buf[p], size - p)) ||
-                    (ic.size > size - p))
-                    break;
-
-                tun_write(tun_fd, &buf[p], ic.size);
-
-                p += ic.size;
-            }
-        }
-    }
-
-    if (gt_reload && tun_fd >= 0) {
-        if (tun_set_persist(tun_fd, 1) == -1)
-            perror("tun_set_persist");
-    }
-
-    ctl_delete(ctl_fd);
-
-    return 0;
-}

src/buffer.h

@@ -0,0 +1,66 @@
+#pragma once
+
+#include "common.h"
+
+typedef struct buffer buffer_t;
+
+struct buffer {
+    uint8_t *data;
+    uint8_t *read;
+    uint8_t *write;
+    uint8_t *end;
+};
+
+static inline void buffer_setup (buffer_t *buffer, void *data, size_t size)
+{
+    if (!data)
+        data = malloc(ALIGN(size));
+
+    buffer->data  = data;
+    buffer->read  = data;
+    buffer->write = data;
+    buffer->end   = data;
+    buffer->end  += size;
+}
+
+static inline void buffer_format (buffer_t *buffer)
+{
+    buffer->write = buffer->data;
+    buffer->read  = buffer->data;
+}
+
+_pure_
+static inline size_t buffer_size (buffer_t *buffer)
+{
+    return buffer->end-buffer->data;
+}
+
+_pure_
+static inline size_t buffer_write_size (buffer_t *buffer)
+{
+    return buffer->end-buffer->write;
+}
+
+_pure_
+static inline size_t buffer_read_size (buffer_t *buffer)
+{
+    return buffer->write-buffer->read;
+}
+
+static inline void buffer_shift (buffer_t *buffer)
+{
+    if (buffer->read==buffer->data)
+        return;
+
+    if (buffer->read==buffer->write) {
+        buffer_format(buffer);
+        return;
+    }
+
+    const size_t size = buffer_read_size(buffer);
+
+    memmove(buffer->data, buffer->read, size);
+
+    buffer->read  = buffer->data;
+    buffer->write = buffer->data+size;
+}

src/common.c

@@ -1,10 +1,22 @@
 #include "common.h"
 
-#include <stdarg.h>
 #include <stdio.h>
+#include <stdarg.h>
 
-void
-gt_log(const char *fmt, ...)
+int gt_print (const char *fmt, ...)
+{
+    va_list ap;
+    va_start(ap, fmt);
+    int ret = vfprintf(stdout, fmt, ap);
+    va_end(ap);
+
+    if (ret<0)
+        return 0;
+
+    return ret;
+}
+
+void gt_log (const char *fmt, ...)
 {
     va_list ap;
     va_start(ap, fmt);
@@ -12,20 +24,34 @@ gt_log(const char *fmt, ...)
     va_end(ap);
 }
 
-int
-gt_tohex(char *dst, size_t dst_size, const uint8_t *src, size_t src_size)
+void gt_fatal (const char *fmt, ...)
 {
-    if (_0_(!dst_size))
+    va_list ap;
+    va_start(ap, fmt);
+    vfprintf(stderr, fmt, ap);
+    va_end(ap);
+
+    exit(EXIT_FAILURE);
+}
+
+void gt_na (const char *name)
+{
+    gt_log("%s is not available on your platform\n", name);
+}
+
+int gt_tohex (char *dst, size_t dst_size, const uint8_t *src, size_t src_size)
+{
+    if _0_(!dst_size)
         return -1;
 
-    if (_0_(((dst_size - 1) / 2) < src_size))
+    if _0_(((dst_size-1)/2)<src_size)
         return -1;
 
     static const char tbl[] = "0123456789ABCDEF";
 
-    for (size_t i = 0; i < src_size; i++) {
-        *dst++ = tbl[0xF & (src[i] >> 4)];
-        *dst++ = tbl[0xF & (src[i])];
+    for (size_t i=0; i<src_size; i++) {
+        *dst++ = tbl[0xF&(src[i]>>4)];
+        *dst++ = tbl[0xF&(src[i])];
     }
 
     *dst = 0;
@@ -33,81 +59,38 @@ gt_tohex(char *dst, size_t dst_size, const uint8_t *src, size_t src_size)
     return 0;
 }
 
-_const_ static inline int
-fromhex(const char c)
+_const_
+static inline int fromhex (const char c)
 {
-    if (c >= '0' && c <= '9')
-        return c - '0';
+    if (c>='0' && c<='9')
+        return c-'0';
 
-    if (c >= 'A' && c <= 'F')
-        return c - 'A' + 10;
+    if (c>='A' && c<='F')
+        return c-'A'+10;
 
-    if (c >= 'a' && c <= 'f')
-        return c - 'a' + 10;
+    if (c>='a' && c<='f')
+        return c-'a'+10;
 
     return -1;
 }
 
-int
-gt_fromhex(uint8_t *dst, size_t dst_size, const char *src, size_t src_size)
+int gt_fromhex (uint8_t *dst, size_t dst_size, const char *src, size_t src_size)
 {
-    if (_0_(src_size & 1))
+    if _0_(src_size&1)
         return -1;
 
-    if (_0_(dst_size < (src_size / 2)))
+    if _0_(dst_size<(src_size/2))
         return -1;
 
-    for (size_t i = 0; i < src_size; i += 2) {
+    for (size_t i=0; i<src_size; i+=2) {
         const int a = fromhex(src[i]);
-        const int b = fromhex(src[i + 1]);
+        const int b = fromhex(src[i+1]);
 
-        if (_0_(a == -1 || b == -1))
+        if _0_(a==-1 || b==-1)
             return -1;
 
-        *dst++ = (a << 4) | b;
+        *dst++ = (a<<4)|b;
     }
 
     return 0;
 }
-
-void
-gt_set_port(struct sockaddr *sa, uint16_t port)
-{
-    switch (sa->sa_family) {
-    case AF_INET:
-        ((struct sockaddr_in *)sa)->sin_port = htons(port);
-        break;
-    case AF_INET6:
-        ((struct sockaddr_in6 *)sa)->sin6_port = htons(port);
-        break;
-    }
-}
-
-uint16_t
-gt_get_port(struct sockaddr *sa)
-{
-    switch (sa->sa_family) {
-    case AF_INET:
-        return ntohs(((struct sockaddr_in *)sa)->sin_port);
-    case AF_INET6:
-        return ntohs(((struct sockaddr_in6 *)sa)->sin6_port);
-    }
-
-    return 0;
-}
-
-int
-gt_toaddr(char *str, size_t size, struct sockaddr *sa)
-{
-    switch (sa->sa_family) {
-    case AF_INET:
-        return -!inet_ntop(AF_INET,
-                           &((struct sockaddr_in *)sa)->sin_addr, str, size);
-    case AF_INET6:
-        return -!inet_ntop(AF_INET6,
-                           &((struct sockaddr_in6 *)sa)->sin6_addr, str, size);
-    }
-
-    errno = EAFNOSUPPORT;
-    return -1;
-}

src/common.h

@@ -1,26 +1,11 @@
 #pragma once
 
-#if defined __linux__ && !defined _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
-
 #include <stdlib.h>
 #include <stdint.h>
 #include <string.h>
 #include <unistd.h>
-#include <signal.h>
 #include <errno.h>
 
-#include <arpa/inet.h>
-
-#ifndef PACKAGE_NAME
-#define PACKAGE_NAME "glorytun"
-#endif
-
-#ifndef PACKAGE_VERSION
-#define PACKAGE_VERSION "0.0.0"
-#endif
-
 #define COUNT(x)       (sizeof(x)/sizeof(x[0]))
 
 #define ALIGN_SIZE     (1<<4)
@@ -44,29 +29,10 @@
 #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; })
-
-#undef MIN
-#define MIN(x,y) ({ __typeof__(x) X=(x); __typeof__(y) Y=(y); X < Y ? X : Y; })
-
-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);
+void gt_fatal (const char *, ...) _printf_(1,2) _noreturn_;
+void gt_na    (const char *);
 
 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_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 **);

src/ctl.c

@@ -1,183 +0,0 @@
-#include "common.h"
-#include "ctl.h"
-#include "str.h"
-
-#include <stdio.h>
-#include <unistd.h>
-#include <dirent.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/un.h>
-
-#define CTL_BIND_MAX 64
-
-int
-ctl_reply(int fd, struct ctl_msg *res, struct ctl_msg *req)
-{
-    if (fd == -1) {
-        errno = EINVAL;
-        return -1;
-    }
-
-    if ((send(fd, req, sizeof(struct ctl_msg), 0) == -1) ||
-        (recv(fd, res, sizeof(struct ctl_msg), 0) == -1))
-        return -1;
-
-    if (res->type != req->type || !res->reply) {
-        errno = EINTR;
-        return -1;
-    }
-
-    if (res->ret) {
-        errno = res->ret;
-        return -1;
-    }
-
-    return 0;
-}
-
-static int
-ctl_setsun(struct sockaddr_un *dst, const char *dir, const char *file)
-{
-    struct sockaddr_un sun = {
-        .sun_family = AF_UNIX,
-    };
-
-    const char *path[] = {dir, "/", file};
-    const size_t len = sizeof(sun.sun_path) - 1;
-
-    if (str_cat(sun.sun_path, len, path, COUNT(path)) == len) {
-        if (str_cat(NULL, len + 1, path, COUNT(path)) > len) {
-            errno = EINVAL;
-            return -1;
-        }
-    }
-
-    *dst = sun;
-
-    return 0;
-}
-
-static int
-ctl_bind(int fd, const char *dir, const char *file)
-{
-    char tmp[32];
-    struct sockaddr_un sun;
-
-    if (str_empty(file)) {
-        for (int i = 0; i < CTL_BIND_MAX; i++) {
-            if (snprintf(tmp, sizeof(tmp), ".%i", i) >= sizeof(tmp))
-                return -1;
-
-            if (ctl_setsun(&sun, dir, tmp))
-                return -1;
-
-            if (!bind(fd, (struct sockaddr *)&sun, sizeof(sun)))
-                return 0;
-        }
-    } else {
-        if (ctl_setsun(&sun, dir, file))
-            return -1;
-
-        unlink(sun.sun_path);
-
-        if (!bind(fd, (struct sockaddr *)&sun, sizeof(sun)))
-            return 0;
-    }
-
-    return -1;
-}
-
-void
-ctl_delete(int fd)
-{
-    if (fd == -1)
-        return;
-
-    struct sockaddr_storage ss;
-    socklen_t sslen = sizeof(ss);
-
-    if ((getsockname(fd, (struct sockaddr *)&ss, &sslen) == 0) &&
-        (ss.ss_family == AF_UNIX))
-        unlink(((struct sockaddr_un *)&ss)->sun_path);
-
-    close(fd);
-}
-
-int
-ctl_create(const char *dir, const char *file)
-{
-    if (str_empty(dir)) {
-        errno = EINVAL;
-        return -1;
-    }
-
-    if (mkdir(dir, 0700) == -1 && errno != EEXIST)
-        return -1;
-
-    int fd = socket(AF_UNIX, SOCK_DGRAM, 0);
-
-    if (fd == -1)
-        return -1;
-
-    if (ctl_bind(fd, dir, file)) {
-        int err = errno;
-        close(fd);
-        errno = err;
-        return -1;
-    }
-
-    return fd;
-}
-
-int
-ctl_connect(const char *dir, const char *file)
-{
-    if (str_empty(dir)) {
-        errno = EINVAL;
-        return -1;
-    }
-
-    if (!file) {
-        DIR *dp = opendir(dir);
-
-        if (!dp)
-            return -1;
-
-        struct dirent *d = NULL;
-
-        while (d = readdir(dp), d) {
-            if (d->d_name[0] == '.')
-                continue;
-
-            if (file) {
-                closedir(dp);
-                errno = ENOENT;
-                return -1;
-            }
-
-            file = &d->d_name[0];
-        }
-
-        closedir(dp);
-    }
-
-    struct sockaddr_un sun;
-
-    if (ctl_setsun(&sun, dir, file))
-        return -1;
-
-    int fd = ctl_create(dir, NULL);
-
-    if (fd == -1)
-        return -1;
-
-    if (connect(fd, (struct sockaddr *)&sun, sizeof(sun))) {
-        int err = errno;
-        ctl_delete(fd);
-        errno = err;
-        return -1;
-    }
-
-    return fd;
-}

src/ctl.h

@@ -1,43 +0,0 @@
-#pragma once
-
-#include "../mud/mud.h"
-
-#include <sys/socket.h>
-
-enum ctl_type {
-    CTL_NONE = 0,
-    CTL_STATE,
-    CTL_STATUS,
-    CTL_MTU,
-    CTL_TC,
-    CTL_TIMEOUT,
-    CTL_TIMETOLERANCE,
-    CTL_PATH_STATUS,
-};
-
-struct ctl_msg {
-    enum ctl_type type;
-    int reply, ret;
-    union {
-        struct {
-            struct sockaddr_storage addr;
-            enum mud_state state;
-        } path;
-        struct mud_path path_status;
-        struct {
-            size_t mtu;
-            int chacha;
-            struct sockaddr_storage bind;
-            struct sockaddr_storage peer;
-        } status;
-        int mtu;
-        int tc;
-        unsigned long timeout;
-        unsigned long timetolerance;
-    };
-};
-
-int  ctl_create  (const char *, const char *);
-int  ctl_connect (const char *, const char *);
-int  ctl_reply   (int, struct ctl_msg *, struct ctl_msg *);
-void ctl_delete  (int);

src/db.c

@@ -0,0 +1,155 @@
+#include "common.h"
+
+#include "db.h"
+#include "str.h"
+
+#define CBIT(X)      (1&(intptr_t)(X))
+#define CBIT_PTR(X)  (uint8_t *)(1|(intptr_t)(X))
+#define CBIT_NODE(X) (struct node *)(1^(intptr_t)(X))
+
+struct node {
+    uint8_t *child[2];
+    uint32_t point;
+};
+
+_pure_
+static inline size_t db_size (const uint8_t *a)
+{
+    return (a[0]?:str_len((char *)a+1))+1;
+}
+
+_pure_
+static inline size_t db_cmp (const uint8_t *a, const uint8_t *b)
+{
+    const size_t size = a[0];
+
+    if (size!=b[0])
+        return 1;
+
+    if (!size) {
+        size_t i = str_cmp((char *)a+1, (char *)b+1);
+        return i?i+1:0;
+    }
+
+    for (size_t i=1; i<=size; i++) {
+        if (a[i]!=b[i])
+            return i+1;
+    }
+
+    return 0;
+}
+
+_pure_
+static inline int db_dir (const uint32_t point, uint8_t *data, const size_t size)
+{
+    const size_t pos = point>>8;
+
+    if (pos>=size)
+        return 0;
+
+    return ((point|data[pos])&255)==255;
+}
+
+uint8_t *db_search (uint8_t **p, uint8_t *data)
+{
+    if _0_(!*p)
+        return NULL;
+
+    uint8_t *r = *p;
+    const size_t size = db_size(data);
+
+    while (CBIT(r)) {
+        struct node *node = CBIT_NODE(r);
+        r = node->child[db_dir(node->point, data, size)];
+    }
+
+    if (!db_cmp(r, data))
+        return r;
+
+    return NULL;
+}
+
+uint8_t *db_insert (uint8_t **p, uint8_t *data)
+{
+    if _0_(CBIT(data))
+        return NULL;
+
+    if _0_(!*p) {
+        *p = data;
+        return data;
+    }
+
+    uint8_t *r = *p;
+    size_t size = db_size(data);
+
+    while (CBIT(r)) {
+        struct node *node = CBIT_NODE(r);
+        r = node->child[db_dir(node->point, data, size)];
+    }
+
+    const size_t diff = db_cmp(r, data);
+
+    if _0_(!diff)
+        return r;
+
+    const size_t pos = diff-1;
+    const uint8_t mask = ~((1u<<31)>>CLZ(r[pos]^data[pos]));
+    const size_t point = (pos<<8)|mask;
+
+    while (CBIT(*p)) {
+        struct node *node = CBIT_NODE(*p);
+
+        if (node->point>point)
+            break;
+
+        p = node->child+db_dir(node->point, data, size);
+    }
+
+    struct node *node = malloc(sizeof(struct node));
+
+    if _0_(!node)
+        return NULL;
+
+    const int dir = (mask|r[pos])==255;
+
+    node->child[dir] = *p;
+    node->child[1-dir] = data;
+    node->point = point;
+
+    *p = CBIT_PTR(node);
+
+    return data;
+}
+
+uint8_t *db_remove (uint8_t **p, uint8_t *data)
+{
+    if _0_(!*p)
+        return NULL;
+
+    const size_t size = db_size(data);
+
+    uint8_t **p_old = NULL;
+    struct node *node = NULL;
+    int dir = 0;
+
+    while (CBIT(*p)) {
+        p_old = p;
+        node = CBIT_NODE(*p);
+        dir = db_dir(node->point, data, size);
+        p = node->child+dir;
+    }
+
+    if _0_(db_cmp(data, *p))
+        return NULL;
+
+    uint8_t *r = *p;
+
+    if (p_old) {
+        *p_old = node->child[1-dir];
+        free(node);
+    } else {
+        *p = NULL;
+    }
+
+    return r;
+}

src/db.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#include <stdint.h>
+
+uint8_t *db_search (uint8_t **, uint8_t *);
+uint8_t *db_insert (uint8_t **, uint8_t *);
+uint8_t *db_remove (uint8_t **, uint8_t *);

src/iface.c

@@ -1,36 +0,0 @@
-#include "common.h"
-#include "iface.h"
-#include "str.h"
-
-#include <net/if.h>
-#include <sys/ioctl.h>
-
-int
-iface_set_mtu(const char *dev_name, int mtu)
-{
-    struct ifreq ifr = {
-        .ifr_mtu = mtu,
-    };
-
-    const size_t len = sizeof(ifr.ifr_name) - 1;
-
-    if (str_cpy(ifr.ifr_name, len, dev_name) == len) {
-        if (str_len(dev_name, len + 1) > len) {
-            errno = EINTR;
-            return -1;
-        }
-    }
-
-    int fd = socket(AF_INET, SOCK_DGRAM, 0);
-
-    if (fd == -1)
-        return -1;
-
-    int ret = ioctl(fd, SIOCSIFMTU, &ifr);
-
-    int err = errno;
-    close(fd);
-    errno = err;
-
-    return ret;
-}

src/iface.h

@@ -1,3 +0,0 @@
-#pragma once
-
-int iface_set_mtu (const char *, int);

src/ip.h

@@ -4,76 +4,34 @@
 
 struct ip_common {
     uint8_t version;
-    uint8_t tc;
     uint8_t proto;
     uint8_t hdr_size;
     uint16_t size;
 };
 
-_pure_ static inline uint8_t
-ip_get_version(const uint8_t *data, size_t size)
+_pure_
+static inline uint8_t ip_get_version (const uint8_t *data, size_t size)
 {
-    if (size < 20)
+    if (size<20)
         return 0;
 
-    return data[0] >> 4;
+    return data[0]>>4;
 }
 
-static inline uint32_t
-ip_read32(const uint8_t *src)
-{
-    uint32_t ret = src[3];
-    ret |= ((uint32_t)src[2]) << 8;
-    ret |= ((uint32_t)src[1]) << 16;
-    ret |= ((uint32_t)src[0]) << 24;
-    return ret;
-}
-
-static inline uint16_t
-ip_read16(const uint8_t *src)
-{
-    uint16_t ret = src[1];
-    ret |= ((uint16_t)src[0]) << 8;
-    return ret;
-}
-
-static inline size_t
-ip_get_mtu(struct ip_common *ic, const uint8_t *data, size_t size)
-{
-    if (ic->hdr_size <= 0 || ic->hdr_size + 8 > size)
-        return 0;
-
-    const uint8_t *p = &data[ic->hdr_size];
-
-    if (ic->version == 4 && ic->proto == 1 && p[0] == 3)
-        return ip_read16(&p[6]);
-
-    // not tested..
-    // if (ic->version == 6 && ic->proto == 58 && p[0] == 2)
-    //    return ip_read32(&p[4]);
-
-    return 0;
-}
-
-static inline int
-ip_get_common(struct ip_common *ic, const uint8_t *data, size_t size)
+static inline int ip_get_common (struct ip_common *ic, const uint8_t *data, size_t size)
 {
     ic->version = ip_get_version(data, size);
 
     switch (ic->version) {
     case 4:
-        ic->tc = data[1];
         ic->proto = data[9];
-        ic->hdr_size = (data[0] & 0xF) << 2;
-        ic->size = ip_read16(&data[2]);
-        if (ic->size >= 20)
+        ic->hdr_size = (data[0]&0xF)<<2;
+        ic->size = ((data[2]<<8)|data[3]);
         return 0;
-        break;
     case 6:
-        ic->tc = ((data[0] & 0xF) << 4) | (data[1] >> 4);
         ic->proto = data[6];
         ic->hdr_size = 40;
-        ic->size = ip_read16(&data[4]) + 40;
+        ic->size = ((data[4]<<8)|data[5])+40;
         return 0;
     }
 

src/keygen.c

@@ -1,22 +0,0 @@
-#include "common.h"
-
-#include <sodium.h>
-#include <stdio.h>
-
-int
-gt_keygen(int argc, char **argv)
-{
-    if (sodium_init() == -1) {
-        gt_log("sodium init failed\n");
-        return 1;
-    }
-
-    unsigned char key[32];
-    randombytes_buf(key, sizeof(key));
-
-    char buf[2 * sizeof(key) + 1];
-    gt_tohex(buf, sizeof(buf), key, sizeof(key));
-    printf("%s\n", buf);
-
-    return 0;
-}

src/option.c

@@ -0,0 +1,140 @@
+#include "common.h"
+
+#include "option.h"
+#include "str.h"
+
+int option_str (void *data, int argc, char **argv)
+{
+    if (argc<2 || str_empty(argv[1])) {
+        gt_print("option `%s' need a string argument\n", argv[0]);
+        return -1;
+    }
+
+    memcpy(data, &argv[1], sizeof(argv[1]));
+
+    return 1;
+}
+
+int option_long (void *data, int argc, char **argv)
+{
+    if (argc<2 || str_empty(argv[1])) {
+        gt_print("option `%s' need an integer argument\n", argv[0]);
+        return -1;
+    }
+
+    errno = 0;
+    char *end;
+    long val = strtol(argv[1], &end, 0);
+
+    if (errno || argv[1]==end) {
+        gt_print("argument `%s' is not a valid integer\n", argv[1]);
+        return -1;
+    }
+
+    memcpy(data, &val, sizeof(val));
+
+    return 1;
+}
+
+int option_is_set (struct option *opts, const char *name)
+{
+    for (int k=0; opts[k].name; k++) {
+        if (!str_cmp(opts[k].name, name))
+            return opts[k].set;
+    }
+
+    return 0;
+}
+
+int option_option (void *data, int argc, char **argv)
+{
+    if (!data)
+        return 0;
+
+    struct option *opts = (struct option *)data;
+
+    for (int k=0; opts[k].name; k++)
+        opts[k].set = 0;
+
+    for (int i=1; i<argc; i++) {
+        int found = 0;
+
+        for (int k=0; opts[k].name; k++) {
+            if (str_cmp(opts[k].name, argv[i]))
+                continue;
+
+            if (opts[k].set) {
+                gt_print("option `%s' is already set\n", opts[k].name);
+                return -1;
+            }
+
+            int ret = opts[k].call(opts[k].data, argc-i, &argv[i]);
+
+            if (ret<0)
+                return -1;
+
+            opts[k].set = 1;
+
+            i += ret;
+            found = 1;
+            break;
+        }
+
+        if (!found)
+            return i-1;
+    }
+
+    return argc;
+}
+
+static int option_usage (struct option *opts, int slen)
+{
+    if (!opts)
+        return 0;
+
+    int len = 0;
+
+    for (int k=0; opts[k].name; k++) {
+        if (len>40) {
+            gt_print("\n%*s", slen, "");
+            len = 0;
+        }
+
+        len += gt_print(" [%s", opts[k].name);
+
+        if (opts[k].call==option_option) {
+            len += option_usage((struct option *)opts[k].data, slen+len);
+        } else {
+            len += gt_print(" ARG");
+        }
+
+        len += gt_print("]");
+    }
+
+    return len;
+}
+
+int option (struct option *opts, int argc, char **argv)
+{
+    int ret = option_option(opts, argc, argv);
+
+    if (ret==argc)
+        return 0;
+
+    if (ret<0 || ret+1>=argc)
+        return 1;
+
+    gt_print("option `%s' is unknown\n", argv[ret+1]);
+
+    int slen = gt_print("usage: %s", argv[0]);
+
+    if (slen>40) {
+        slen = 12;
+        gt_print("\n%*s", slen, "");
+    }
+
+    option_usage(opts, slen);
+    gt_print("\n");
+
+    return 1;
+}

src/option.h

@@ -0,0 +1,15 @@
+#pragma once
+
+struct option {
+    char *name;
+    void *data;
+    int (*call) (void *, int, char **);
+    int set;
+};
+
+int option_option (void *, int, char **);
+int option_str    (void *, int, char **);
+int option_long   (void *, int, char **);
+
+int option_is_set (struct option *, const char *);
+int option        (struct option *, int, char **);

src/path.c

@@ -1,120 +0,0 @@
-#include "common.h"
-#include "ctl.h"
-#include "str.h"
-
-#include <stdio.h>
-#include <sys/socket.h>
-
-#include "../argz/argz.h"
-
-int
-gt_path_status(int fd)
-{
-    struct ctl_msg req = {
-        .type = CTL_PATH_STATUS,
-    }, res = {0};
-
-    if (send(fd, &req, sizeof(struct ctl_msg), 0) == -1)
-        return -1;
-
-    do {
-        if (recv(fd, &res, sizeof(struct ctl_msg), 0) == -1)
-            return -1;
-
-        if (res.type != req.type)
-            return -2;
-
-        if (!res.ret)
-            return 0;
-
-        char bindstr[INET6_ADDRSTRLEN] = {0};
-        char publstr[INET6_ADDRSTRLEN] = {0};
-        char peerstr[INET6_ADDRSTRLEN] = {0};
-
-        if (gt_toaddr(bindstr, sizeof(bindstr),
-                      (struct sockaddr *)&res.path_status.local_addr) ||
-            gt_toaddr(publstr, sizeof(publstr),
-                      (struct sockaddr *)&res.path_status.r_addr) ||
-            gt_toaddr(peerstr, sizeof(peerstr),
-                      (struct sockaddr *)&res.path_status.addr))
-            return -2;
-
-        const char *statestr = NULL;
-
-        switch (res.path_status.state) {
-            case MUD_UP:     statestr = "UP";     break;
-            case MUD_BACKUP: statestr = "BACKUP"; break;
-            case MUD_DOWN:   statestr = "DOWN";   break;
-            default:         return -2;
-        }
-
-        printf("path %s\n"
-               "  bind:   %s\n"
-               "  public: %s port %"PRIu16"\n"
-               "  peer:   %s port %"PRIu16"\n"
-               "  mtu:    %zu bytes\n"
-               "  rtt:    %.3f ms\n",
-               statestr, bindstr,
-               publstr, gt_get_port((struct sockaddr *)&res.path_status.r_addr),
-               peerstr, gt_get_port((struct sockaddr *)&res.path_status.addr),
-               res.path_status.mtu.ok + 28U,     /* ip+udp hdr */
-               res.path_status.rtt/(double)1e3);
-
-    } while (res.ret == EAGAIN);
-
-    return 0;
-}
-
-int
-gt_path(int argc, char **argv)
-{
-    const char *dev = NULL;
-
-    struct ctl_msg req = {
-        .type = CTL_STATE,
-    }, res = {0};
-
-    struct argz pathz[] = {
-        {NULL, "IPADDR", &req.path.addr, argz_addr},
-        {"dev", "NAME", &dev, argz_str},
-        {"up|backup|down", NULL, NULL, argz_option},
-        {NULL}};
-
-    if (argz(pathz, argc, argv))
-        return 1;
-
-    int fd = ctl_connect("/run/" PACKAGE_NAME, dev);
-
-    if (fd == -1) {
-        perror("path");
-        ctl_delete(fd);
-        return 1;
-    }
-
-    int ret = 0;
-
-    if (!req.path.addr.ss_family) {
-        ret = gt_path_status(fd);
-
-        if (ret == -2)
-            gt_log("bad reply from server\n");
-    } else {
-        if (argz_is_set(pathz, "up")) {
-            req.path.state = MUD_UP;
-        } else if (argz_is_set(pathz, "backup")) {
-            req.path.state = MUD_BACKUP;
-        } else if (argz_is_set(pathz, "down")) {
-            req.path.state = MUD_DOWN;
-        }
-
-        if (req.path.state)
-            ret = ctl_reply(fd, &res, &req);
-    }
-
-    if (ret == -1)
-        perror("path");
-
-    ctl_delete(fd);
-
-    return 0;
-}

src/set.c

@@ -1,154 +0,0 @@
-#include "common.h"
-#include "ctl.h"
-#include "str.h"
-
-#include <stdio.h>
-#include <sys/socket.h>
-
-#include "../argz/argz.h"
-
-static int
-gt_set_mtu(int fd, size_t mtu)
-{
-    struct ctl_msg res, req = {
-        .type = CTL_MTU,
-        .mtu = mtu,
-    };
-
-    int ret = ctl_reply(fd, &res, &req);
-
-    if (ret) {
-        perror("set mtu");
-        return 1;
-    }
-
-    printf("mtu set to %i\n", res.mtu);
-
-    return 0;
-}
-
-static int
-gt_set_timeout(int fd, unsigned long timeout)
-{
-    struct ctl_msg res, req = {
-        .type = CTL_TIMEOUT,
-        .timeout = timeout,
-    };
-
-    int ret = ctl_reply(fd, &res, &req);
-
-    if (ret) {
-        perror("set timeout");
-        return 1;
-    }
-
-    return 0;
-}
-
-static int
-gt_set_timetolerance(int fd, unsigned long timetolerance)
-{
-    struct ctl_msg res, req = {
-        .type = CTL_TIMETOLERANCE,
-        .timetolerance = timetolerance,
-    };
-
-    int ret = ctl_reply(fd, &res, &req);
-
-    if (ret) {
-        perror("set timetolerance");
-        return 1;
-    }
-
-    return 0;
-}
-
-static int
-gt_set_tc(int fd, int tc)
-{
-    struct ctl_msg res, req = {
-        .type = CTL_TC,
-        .tc = tc,
-    };
-
-    int ret = ctl_reply(fd, &res, &req);
-
-    if (ret) {
-        perror("set tc");
-        return 1;
-    }
-
-    return 0;
-}
-
-static int
-gt_argz_tc(void *data, int argc, char **argv)
-{
-    if (argc < 1 || !argv[0])
-        return -1;
-
-    int val = 0;
-    const char *s = argv[0];
-
-    if ((s[0] == 'C') && (s[1] == 'S') &&
-        (s[2] >= '0') && (s[2] <= '7') && !s[3]) {
-        val = (s[2] - '0') << 3;
-    } else if ((s[0] == 'A') && (s[1] == 'F') &&
-               (s[2] >= '1') && (s[2] <= '4') &&
-               (s[3] >= '1') && (s[3] <= '3') && !s[4]) {
-        val = ((s[2] - '0') << 3) | ((s[3] - '0') << 1);
-    } else if ((s[0] == 'E') && (s[1] == 'F') && !s[2]) {
-        val = 46;
-    } else return -1;
-
-    if (data)
-        *(int *)data = val;
-
-    return 1;
-}
-
-int
-gt_set(int argc, char **argv)
-{
-    const char *dev = NULL;
-    size_t mtu;
-    int tc;
-    unsigned long timetolerance;
-    unsigned long timeout;
-
-    struct argz pathz[] = {
-        {"dev", "NAME", &dev, argz_str},
-        {"mtu", "BYTES", &mtu, argz_bytes},
-        {"tc", "CS|AF|EF", &tc, gt_argz_tc},
-        {"timeout", "SECONDS", &timeout, argz_time},
-        {"timetolerance", "SECONDS", &timetolerance, argz_time},
-        {NULL}};
-
-    if (argz(pathz, argc, argv))
-        return 1;
-
-    int fd = ctl_connect("/run/" PACKAGE_NAME, dev);
-
-    if (fd == -1) {
-        perror("set");
-        return 1;
-    }
-
-    int ret = 0;
-
-    if (argz_is_set(pathz, "mtu"))
-        ret |= gt_set_mtu(fd, mtu);
-
-    if (argz_is_set(pathz, "tc"))
-        ret |= gt_set_tc(fd, tc);
-
-    if (argz_is_set(pathz, "timeout"))
-        ret |= gt_set_timeout(fd, timeout);
-
-    if (argz_is_set(pathz, "timetolerance"))
-        ret |= gt_set_timetolerance(fd, timetolerance);
-
-    ctl_delete(fd);
-
-    return ret;
-}

src/show.c

@@ -1,115 +0,0 @@
-#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>
-
-static int
-gt_show_dev_status(int fd, const char *dev)
-{
-    struct ctl_msg res, req = {.type = CTL_STATUS};
-
-    if (ctl_reply(fd, &res, &req))
-        return -1;
-
-    char bindstr[INET6_ADDRSTRLEN] = {0};
-    char peerstr[INET6_ADDRSTRLEN] = {0};
-
-    if (gt_toaddr(bindstr, sizeof(bindstr),
-                  (struct sockaddr *)&res.status.bind))
-        return -2;
-
-    int server = gt_toaddr(peerstr, sizeof(peerstr),
-                           (struct sockaddr *)&res.status.peer);
-
-    if (server) {
-        printf("server %s:\n"
-               "  bind:      %s port %"PRIu16"\n"
-               "  mtu:       %zu\n"
-               "  cipher:    %s\n",
-               dev,
-               bindstr, gt_get_port((struct sockaddr *)&res.status.bind),
-               res.status.mtu,
-               res.status.chacha ? "chacha20poly1305" : "aes256gcm");
-    } else {
-        printf("client %s:\n"
-               "  bind:      %s port %"PRIu16"\n"
-               "  peer:      %s port %"PRIu16"\n"
-               "  mtu:       %zu\n"
-               "  cipher:    %s\n",
-               dev,
-               bindstr, gt_get_port((struct sockaddr *)&res.status.bind),
-               peerstr, gt_get_port((struct sockaddr *)&res.status.peer),
-               res.status.mtu,
-               res.status.chacha ? "chacha20poly1305" : "aes256gcm");
-    }
-
-    return 0;
-}
-
-static int
-gt_show_dev(const char *dev)
-{
-    int fd = ctl_connect("/run/" PACKAGE_NAME, dev);
-
-    if (fd == -1) {
-        perror(dev);
-        return -1;
-    }
-
-    int ret = gt_show_dev_status(fd, dev);
-
-    if (ret == -1)
-        perror(dev);
-
-    if (ret == -2)
-        gt_log("%s: bad reply from server\n", dev);
-
-    ctl_delete(fd);
-
-    return ret;
-}
-
-int
-gt_show(int argc, char **argv)
-{
-    const char *dev = NULL;
-
-    struct argz showz[] = {
-        {"dev", "NAME", &dev, argz_str},
-        {NULL}};
-
-    if (argz(showz, argc, argv))
-        return 1;
-
-    if (dev) {
-        gt_show_dev(dev);
-        return 0;
-    }
-
-    DIR *dp = opendir("/run/" PACKAGE_NAME);
-
-    if (!dp) {
-        if (errno == ENOENT)
-            return 0;
-        perror("show");
-        return 1;
-    }
-
-    struct dirent *d = NULL;
-
-    while (d = readdir(dp), d) {
-        if (d->d_name[0] != '.')
-            gt_show_dev(d->d_name);
-    }
-
-    closedir(dp);
-
-    return 0;
-}

src/state.c

@@ -0,0 +1,61 @@
+#include "common.h"
+
+#include "state.h"
+#include "str.h"
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+static int state_fd = -1;
+
+int state_init (const char *filename)
+{
+    if (str_empty(filename))
+        return 0;
+
+    state_fd = open(filename, O_WRONLY);
+
+    if (state_fd==-1) {
+        if (errno!=EINTR)
+            perror("open");
+        return -1;
+    }
+
+    struct stat st = {0};
+
+    if (fstat(state_fd, &st)==-1) {
+        perror("fstat");
+        close(state_fd);
+        state_fd = -1;
+        return -1;
+    }
+
+    if (!S_ISFIFO(st.st_mode)) {
+        gt_log("`%s' is not a fifo\n", filename);
+        close(state_fd);
+        state_fd = -1;
+        return -1;
+    }
+
+    return 0;
+}
+
+void state (const char *state, const char *info)
+{
+    if (str_empty(state))
+        return;
+
+    const char *strs[] = { state, " ", info, "\n" };
+    char *str = str_cat(strs, COUNT(strs));
+
+    if (!str)
+        return;
+
+    if (state_fd==-1) {
+        gt_print("%s", str);
+    } else {
+        if (write(state_fd, str, str_len(str))==-1 && errno!=EINTR)
+            perror("write");
+    }
+}

src/state.h

@@ -0,0 +1,4 @@
+#pragma once
+
+int  state_init (const char *);
+void state      (const char *, const char *);

src/str.h

@@ -2,61 +2,72 @@
 
 #include "common.h"
 
-_pure_ static inline int
-str_empty(const char *restrict str)
+static inline size_t str_cpy (char *restrict dst, const char *restrict src, size_t len)
+{
+    if (!dst || !src)
+        return 0;
+
+    size_t i;
+
+    for (i=0; i<len && src[i]; i++)
+        dst[i] = src[i];
+
+    dst[i] = 0;
+
+    return i;
+}
+
+_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)
+_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])
+    while (sa[i]==sb[i])
         if (!sa[i++])
             return 0;
 
-    return i + 1;
+    return i+1;
 }
 
-_pure_ static inline size_t
-str_len(const char *restrict str, size_t len)
+_pure_
+static inline size_t str_len (const char *restrict str)
 {
     if (!str)
         return 0;
 
-    return strnlen(str, len);
+    return strlen(str);
 }
 
-static inline size_t
-str_cat(char *dst, size_t dst_len, const char **src, size_t count)
+static inline char *str_cat (const char **strs, size_t count)
 {
-    if (count && !src)
-        return 0;
+    size_t size = 1;
 
-    size_t len = 0;
+    for (size_t i=0; i<count; i++)
+        size += str_len(strs[i]);
 
-    for (size_t i = 0; i < count && dst_len > len; i++) {
-        size_t n = str_len(src[i], dst_len - len);
+    char *str = malloc(size);
 
-        if (dst && n)
-            memmove(&dst[len], src[i], n);
+    if (!str)
+        return NULL;
 
-        len += n;
+    char *p = str;
+
+    for (size_t i=0; i<count; i++) {
+        size_t len = str_len(strs[i]);
+        memcpy(p, strs[i], len);
+        p += len;
     }
 
-    if (dst)
-        dst[len] = 0;
+    p[0] = 0;
 
-    return len;
-}
-
-static inline size_t
-str_cpy(char *dst, size_t dst_len, const char *src)
-{
-    return str_cat(dst, dst_len, &src, 1);
+    return str;
 }

src/tun.c

@@ -1,26 +1,25 @@
 #include "common.h"
-#include "ip.h"
-#include "str.h"
-#include "tun.h"
 
-#include <fcntl.h>
+#include "tun.h"
+#include "str.h"
+#include "ip.h"
+
 #include <stdio.h>
+#include <fcntl.h>
+
 #include <sys/ioctl.h>
 #include <sys/socket.h>
 #include <sys/uio.h>
-#include <net/if.h>
 
 #ifdef __linux__
-#define IFF_TUN 0x0001
-#define IFF_NO_PI 0x1000
-#define TUNSETIFF _IOW('T', 202, int)
-#define TUNSETPERSIST _IOW('T', 203, int)
+#include <linux/if.h>
+#include <linux/if_tun.h>
 #endif
 
 #ifdef __APPLE__
-#include <net/if_utun.h>
-#include <sys/kern_control.h>
 #include <sys/sys_domain.h>
+#include <sys/kern_control.h>
+#include <net/if_utun.h>
 #endif
 
 #if defined(__APPLE__) || defined(__OpenBSD__)
@@ -29,28 +28,20 @@
 
 #ifdef __APPLE__
 
-static int
-tun_create_by_id(char *name, size_t len, unsigned id)
+static int tun_create_by_id (char *name, size_t size, unsigned id, _unused_ int mq)
 {
-    int ret = snprintf(name, len + 1, "utun%u", id);
-
-    if (ret <= 0 || ret > len) {
-        errno = EINVAL;
-        return -1;
-    }
-
     int fd = socket(PF_SYSTEM, SOCK_DGRAM, SYSPROTO_CONTROL);
 
-    if (fd == -1)
+    if (fd==-1)
         return -1;
 
-    struct ctl_info ci = {0};
-    str_cpy(ci.ctl_name, sizeof(ci.ctl_name) - 1, UTUN_CONTROL_NAME);
+    struct ctl_info ci;
+
+    memset(&ci, 0, sizeof(ci));
+    str_cpy(ci.ctl_name, UTUN_CONTROL_NAME, sizeof(ci.ctl_name)-1);
 
     if (ioctl(fd, CTLIOCGINFO, &ci)) {
-        int err = errno;
         close(fd);
-        errno = err;
         return -1;
     }
 
@@ -59,167 +50,152 @@ tun_create_by_id(char *name, size_t len, unsigned id)
         .sc_len = sizeof(sc),
         .sc_family = AF_SYSTEM,
         .ss_sysaddr = AF_SYS_CONTROL,
-        .sc_unit = id + 1,
+        .sc_unit = id+1,
     };
 
     if (connect(fd, (struct sockaddr *)&sc, sizeof(sc))) {
-        int err = errno;
         close(fd);
-        errno = err;
         return -1;
     }
 
+    snprintf(name, size, "utun%u", id);
+
     return fd;
 }
 
-static int
-tun_create_by_name(char *name, size_t len, const char *dev_name)
+static int tun_create_by_name (char *name, size_t size, char *dev_name, int mq)
 {
     unsigned id = 0;
 
-    if (sscanf(dev_name, "utun%u", &id) != 1) {
-        errno = EINVAL;
+    if (sscanf(dev_name, "utun%u", &id)!=1)
         return -1;
-    }
 
-    return tun_create_by_id(name, len, id);
+    return tun_create_by_id(name, size, id, mq);
 }
 
 #else /* not __APPLE__ */
 
 #ifdef __linux__
 
-static int
-tun_create_by_name(char *name, size_t len, const char *dev_name)
+static int tun_create_by_name (char *name, size_t size, char *dev_name, int mq)
 {
-    struct ifreq ifr = {
-        .ifr_flags = IFF_TUN | IFF_NO_PI,
-    };
-
-    const size_t ifr_len = sizeof(ifr.ifr_name) - 1;
-
-    if ((len < ifr_len) ||
-        (str_len(dev_name, ifr_len + 1) > ifr_len)) {
-        errno = EINVAL;
-        return -1;
-    }
-
     int fd = open("/dev/net/tun", O_RDWR);
 
-    if (fd == -1)
+    if (fd==-1)
         return -1;
 
-    str_cpy(ifr.ifr_name, ifr_len, dev_name);
+    struct ifreq ifr = {
+        .ifr_flags = IFF_TUN|IFF_NO_PI,
+    };
+
+    if (mq) {
+#ifdef IFF_MULTI_QUEUE
+        ifr.ifr_flags |= IFF_MULTI_QUEUE;
+#endif
+    }
+
+    str_cpy(ifr.ifr_name, dev_name, IFNAMSIZ-1);
 
     if (ioctl(fd, TUNSETIFF, &ifr)) {
-        int err = errno;
         close(fd);
-        errno = err;
         return -1;
     }
 
-    str_cpy(name, len, ifr.ifr_name);
+    str_cpy(name, ifr.ifr_name, size-1);
 
     return fd;
 }
 
 #else /* not __linux__ not __APPLE__ */
 
-static int
-tun_create_by_name(char *name, size_t len, const char *dev_name)
+static int tun_create_by_name (char *name, size_t size, char *dev_name, _unused_ int mq)
 {
-    char tmp[128];
+    char path[64];
 
-    int ret = snprintf(tmp, sizeof(tmp), "/dev/%s", dev_name);
+    snprintf(path, sizeof(path), "/dev/%s", dev_name);
+    str_cpy(name, dev_name, size-1);
 
-    if (ret <= 0 || ret >= sizeof(tmp)) {
-        errno = EINVAL;
-        return -1;
-    }
-
-    if (str_cpy(name, len, dev_name) == len) {
-        if (str_len(dev_name, len + 1) > len) {
-            errno = EINVAL;
-            return -1;
-        }
-    }
-
-    return open(tmp, O_RDWR);
+    return open(path, O_RDWR);
 }
 
 #endif /* not __APPLE__ */
 
-static int
-tun_create_by_id(char *name, size_t len, unsigned id)
+static int tun_create_by_id (char *name, size_t size, unsigned id, int mq)
 {
-    char tmp[64];
+    char dev_name[64];
 
-    int ret = snprintf(tmp, sizeof(tmp), "tun%u", id);
+    snprintf(dev_name, sizeof(dev_name), "tun%u", id);
 
-    if (ret <= 0 || ret >= sizeof(tmp)) {
-        errno = EINVAL;
-        return -1;
-    }
-
-    return tun_create_by_name(name, len, tmp);
+    return tun_create_by_name(name, size, dev_name, mq);
 }
 
 #endif
 
-int
-tun_create(char *name, size_t len, const char *dev_name)
+int tun_create (char *dev_name, char **ret_name, int mq)
 {
+    char name[64] = {0};
     int fd = -1;
 
+#ifndef IFF_MULTI_QUEUE
+    if (mq)
+        gt_na("IFF_MULTI_QUEUE");
+#endif
+
     if (str_empty(dev_name)) {
-        for (unsigned id = 0; id < 32 && fd == -1; id++)
-            fd = tun_create_by_id(name, len, id);
+        for (unsigned id=0; id<32 && fd==-1; id++)
+            fd = tun_create_by_id(name, sizeof(name), id, mq);
     } else {
-        fd = tun_create_by_name(name, len, dev_name);
+        fd = tun_create_by_name(name, sizeof(name), dev_name, mq);
     }
 
+    if (fd!=-1 && ret_name)
+        *ret_name = strdup(name);
+
     return fd;
 }
 
-int
-tun_read(int fd, void *data, size_t size)
+ssize_t tun_read (int fd, void *data, size_t size)
 {
     if (!size)
-        return 0;
+        return -1;
 
 #ifdef GT_BSD_TUN
     uint32_t family;
 
     struct iovec iov[2] = {
-        {
-            .iov_base = &family,
-            .iov_len = sizeof(family),
-        },
-        {
-            .iov_base = data,
-            .iov_len = size,
-        },
+        { .iov_base = &family, .iov_len = sizeof(family) },
+        { .iov_base = data, .iov_len = size }
     };
 
     ssize_t ret = readv(fd, iov, 2);
+#else
+    ssize_t ret = read(fd, data, size);
+#endif
 
-    if (ret <= (ssize_t)0)
-        return ret;
+    if (ret==-1) {
+        if (errno==EAGAIN || errno==EINTR)
+            return -1;
 
-    if (ret <= (ssize_t)sizeof(family))
+        if (errno)
+            perror("tun read");
+
+        return 0;
+    }
+
+#ifdef GT_BSD_TUN
+    if (ret<(ssize_t) sizeof(family))
         return 0;
 
-    return ret - sizeof(family);
+    return ret-sizeof(family);
 #else
-    return read(fd, data, size);
+    return ret;
 #endif
 }
 
-int
-tun_write(int fd, const void *data, size_t size)
+ssize_t tun_write (int fd, const void *data, size_t size)
 {
     if (!size)
-        return 0;
+        return -1;
 
 #ifdef GT_BSD_TUN
     uint32_t family;
@@ -232,42 +208,35 @@ tun_write(int fd, const void *data, size_t size)
         family = htonl(AF_INET6);
         break;
     default:
-        errno = EINVAL;
         return -1;
     }
 
     struct iovec iov[2] = {
-        {
-            .iov_base = &family,
-            .iov_len = sizeof(family),
-        },
-        {
-            .iov_base = (void *)data,
-            .iov_len = size,
-        },
+        { .iov_base = &family, .iov_len = sizeof(family) },
+        { .iov_base = (void *) data, .iov_len = size },
     };
 
     ssize_t ret = writev(fd, iov, 2);
+#else
+    ssize_t ret = write(fd, data, size);
+#endif
 
-    if (ret <= (ssize_t)0)
-        return ret;
+    if (ret==-1) {
+        if (errno==EAGAIN || errno==EINTR)
+            return -1;
 
-    if (ret <= (ssize_t)sizeof(family))
+        if (errno)
+            perror("tun write");
+
+        return 0;
+    }
+
+#ifdef GT_BSD_TUN
+    if (ret<(ssize_t) sizeof(family))
         return 0;
 
-    return ret - sizeof(family);
+    return ret-sizeof(family);
 #else
-    return write(fd, data, size);
-#endif
-}
-
-int
-tun_set_persist(int fd, int on)
-{
-#ifdef TUNSETPERSIST
-    return ioctl(fd, TUNSETPERSIST, on);
-#else
-    errno = ENOSYS;
-    return -1;
+    return ret;
 #endif
 }

src/tun.h

@@ -1,6 +1,7 @@
 #pragma once
 
-int tun_create      (char *, size_t, const char *);
-int tun_read        (int, void *, size_t);
-int tun_write       (int, const void *, size_t);
-int tun_set_persist (int, int);
+#include <unistd.h>
+
+int     tun_create (char *, char **, int);
+ssize_t tun_read   (int, void *, size_t);
+ssize_t tun_write  (int, const void *, size_t);

systemd/glorytun-client.network

@@ -1,10 +0,0 @@
-[Match]
-Name=gtc-*
-
-[Network]
-Description=Glorytun client device
-DHCP=ipv4
-
-[DHCP]
-CriticalConnection=yes
-RouteTable=200

systemd/glorytun-run

@@ -1,6 +0,0 @@
-#!/bin/sh
-
-exec glorytun bind "$@" \
-	$BIND $BIND_PORT \
-	${DEV:+dev "$DEV"} \
-	${HOST:+to "$HOST" "$PORT"}

systemd/glorytun-setup

@@ -1,73 +0,0 @@
-#!/bin/sh
-
-set -e
-
-_ask() {
-	printf "%s: " "$1"
-	read -r "$2"
-}
-
-_ask "Config filename (tun0)" NAME
-NAME=${NAME:-tun0}
-DIR="/etc/glorytun/$NAME"
-
-if [ -d "$DIR" ]; then
-	echo "This config already exit!"
-	exit 1
-fi
-
-_ask "Server ip (enter for server conf)" HOST
-if [ -z "$HOST" ]; then
-	_ask "Bind to port (5000)" BIND_PORT
-	BIND_PORT=${BIND_PORT:-5000}
-else
-	_ask "Server port (5000)" PORT
-	PORT=${PORT:-5000}
-fi
-
-BIND=0.0.0.0
-case "$HOST" in
-	*:*) BIND=::
-esac
-
-_ask "Server key (enter to generate a new one)" KEY
-if [ -z "$KEY" ]; then
-	KEY=$(glorytun keygen)
-	echo "Your new key: $KEY"
-fi
-
-# install files
-mkdir -p "$DIR"
-
-cat > "$DIR/env" <<EOF
-DEV=gt${HOST:+c}-$NAME
-HOST=$HOST
-PORT=$PORT
-BIND=$BIND
-BIND_PORT=$BIND_PORT
-OPTIONS=
-EOF
-
-( umask 077; echo "$KEY" > "$DIR/key" )
-
-[ "$HOST" ] && cat > "$DIR/post.sh" <<'EOF'
-#!/bin/sh
-
-PREF=32765
-TABLE=200
-
-# keep the current route to HOST
-SRC=$(ip route get "$HOST" | awk '/src/{getline;print $0}' RS=' ')
-ip rule add from "$SRC" table main pref "$((PREF-1))" || true
-glorytun path up "$SRC" dev "$DEV"
-
-# forward everything else to the tunnel
-ip rule add from all table "$TABLE" pref "$PREF" || true
-EOF
-[ -f "$DIR/post.sh" ] && chmod u+x "$DIR/post.sh"
-
-# start services
-_ask "Start glorytun now ? (enter to skip)" START
-case "$START" in y*|Y*)
-	systemctl start glorytun@"$NAME" ;;
-esac

systemd/glorytun.network

@@ -1,14 +0,0 @@
-[Match]
-Name=gt-*
-
-[Network]
-Description=Glorytun server device
-Address=0.0.0.0/24
-DHCPServer=yes
-IPMasquerade=yes
-
-[DHCPServer]
-PoolOffset=2
-PoolSize=1
-EmitDNS=yes
-DNS=9.9.9.9

systemd/glorytun@.service.in

@@ -1,14 +0,0 @@
-[Unit]
-Description=Glorytun on %I
-After=network.target
-
-[Service]
-Type=simple
-Restart=always
-EnvironmentFile=/etc/glorytun/%i/env
-ExecStart=@bindir@/glorytun-run keyfile /etc/glorytun/%i/key $OPTIONS
-ExecStartPost=-/etc/glorytun/%i/post.sh
-CapabilityBoundingSet=CAP_NET_ADMIN
-
-[Install]
-WantedBy=multi-user.target