From 6773f3ff20c2826dc0f32e4d20b73572769f6e40 Mon Sep 17 00:00:00 2001 From: Christian Pointner Date: Thu, 30 Apr 2009 19:56:13 +0000 Subject: [PATCH] initial checkin of c-implementaion of door_damon --- door_daemon/AUTHORS | 1 + door_daemon/LICENSE | 707 +++++++++++++++++++++++++++++++++++++++++++++ door_daemon/Makefile | 66 +++++ door_daemon/configure | 106 +++++++ door_daemon/daemon.h | 172 +++++++++++ door_daemon/datatypes.h | 79 +++++ door_daemon/door_daemon.c | 286 ++++++++++++++++++ door_daemon/log.c | 258 +++++++++++++++++ door_daemon/log.h | 89 ++++++ door_daemon/log_targets.h | 336 +++++++++++++++++++++ door_daemon/options.c | 510 ++++++++++++++++++++++++++++++++ door_daemon/options.h | 95 ++++++ door_daemon/sig_handler.c | 64 ++++ door_daemon/sig_handler.h | 45 +++ door_daemon/string_list.c | 112 +++++++ door_daemon/string_list.h | 55 ++++ door_daemon/sysexec.h | 77 +++++ 17 files changed, 3058 insertions(+) create mode 100644 door_daemon/AUTHORS create mode 100644 door_daemon/LICENSE create mode 100644 door_daemon/Makefile create mode 100755 door_daemon/configure create mode 100644 door_daemon/daemon.h create mode 100644 door_daemon/datatypes.h create mode 100644 door_daemon/door_daemon.c create mode 100644 door_daemon/log.c create mode 100644 door_daemon/log.h create mode 100644 door_daemon/log_targets.h create mode 100644 door_daemon/options.c create mode 100644 door_daemon/options.h create mode 100644 door_daemon/sig_handler.c create mode 100644 door_daemon/sig_handler.h create mode 100644 door_daemon/string_list.c create mode 100644 door_daemon/string_list.h create mode 100644 door_daemon/sysexec.h diff --git a/door_daemon/AUTHORS b/door_daemon/AUTHORS new file mode 100644 index 0000000..6762c7c --- /dev/null +++ b/door_daemon/AUTHORS @@ -0,0 +1 @@ +Christian Pointner diff --git a/door_daemon/LICENSE b/door_daemon/LICENSE new file mode 100644 index 0000000..72582db --- /dev/null +++ b/door_daemon/LICENSE @@ -0,0 +1,707 @@ +/* + * uAnytun + * + * uAnytun is a tiny implementation of SATP. Unlike Anytun which is a full + * featured implementation uAnytun has no support for multiple connections + * or synchronisation. It is a small single threaded implementation intended + * to act as a client on small platforms. + * The secure anycast tunneling protocol (satp) defines a protocol used + * for communication between any combination of unicast and anycast + * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel + * mode and allows tunneling of every ETHER TYPE protocol (e.g. + * ethernet, ip, arp ...). satp directly includes cryptography and + * message authentication based on the methodes used by SRTP. It is + * intended to deliver a generic, scaleable and secure solution for + * tunneling and relaying of packets of any protocol. + * + * + * Copyright (C) 2007-2008 Christian Pointner + * + * This file is part of uAnytun. + * + * uAnytun is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 3 as + * published by the Free Software Foundation. + * + * uAnytun is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with uAnytun. 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Limitation of Liability. + + IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS +THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY +GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE +USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF +DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD +PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), +EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF +SUCH DAMAGES. + + 17. Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/door_daemon/Makefile b/door_daemon/Makefile new file mode 100644 index 0000000..adf4bfd --- /dev/null +++ b/door_daemon/Makefile @@ -0,0 +1,66 @@ +## +## door_daemon +## +## Copyright (C) 2009 Christian Pointner +## +## This file is part of door_daemon. +## +## door_daemon is free software: you can redistribute it and/or modify +## it under the terms of the GNU General Public License version 3 as +## published by the Free Software Foundation. +## +## door_daemon is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## +## You should have received a copy of the GNU General Public License +## along with door_daemon. If not, see . +## + +ifneq ($(MAKECMDGOALS),distclean) +include include.mk +endif + +EXECUTABLE := door_daemon + +OBJ := log.o \ + sig_handler.o \ + door_daemon.o + + +SRC := $(OBJ:%.o=%.c) + +.PHONY: clean distclean + +all: $(EXECUTABLE) + +%.d: %.c + @set -e; rm -f $@; \ + $(CC) -MM $(CFLAGS) $< > $@.$$$$; \ + sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' < $@.$$$$ > $@; \ + rm -f $@.$$$$; echo '(re)building $@' + +ifneq ($(MAKECMDGOALS),distclean) +-include $(SRC:%.c=%.d) +endif + +door_daemon: $(OBJ) + $(CC) $(OBJ) -o $@ $(LDFLAGS) + +%.o: %.c + $(CC) $(CFLAGS) -c $< + + +distclean: clean + find . -name *.o -exec rm -f {} \; + find . -name "*.\~*" -exec rm -rf {} \; + rm -f include.mk + rm -f tun.c + +clean: + rm -f *.o + rm -f *.d + rm -f *.d.* + rm -f $(EXECUTABLE) + diff --git a/door_daemon/configure b/door_daemon/configure new file mode 100755 index 0000000..e2b139d --- /dev/null +++ b/door_daemon/configure @@ -0,0 +1,106 @@ +#!/bin/sh +# +# +# door_daemon +# +# Copyright (C) 2009 Christian Pointner +# +# This file is part of door_daemon. +# +# door_daemon is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License version 3 as +# published by the Free Software Foundation. +# +# door_daemon is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with door_daemon. If not, see . +# + +TARGET=`uname -s` + +CFLAGS='-g -O2' +LDFLAGS='-g -Wall -O2' + +PREFIX='/usr/local' +USERNAME='uanytun' +USERHOME='/var/run/uanytun' + +print_usage() { + echo "configure --help print this" + echo " --target= build target i.e. Linux (default: autodetect)" + echo " --prefix= the installation prefix (default: /usr/local)" + echo " --username= create this user when installing (default: uanytun)" + echo " --userhome= the home directory of the user to be created (default: /var/run/uanytun)" +} + +for arg +do + case $arg in + --target=*) + TARGET=${arg#--target=} + ;; + --prefix=*) + PREFIX=${arg#--prefix=} + ;; + --username=*) + USERNAME=${arg#--username=} + ;; + --userhome=*) + USERHOME=${arg#--userhome=} + ;; + --help) + print_usage + exit 0 + ;; + *) + echo "Unknown argument: $arg" + print_usage + exit 1 + ;; + esac +done + +rm -f include.mk +case $TARGET in + Linux) + echo "Linux specific build options" + ;; + OpenBSD|FreeBSD|NetBSD) + echo "BSD specific build options" + CFLAGS=$CFLAGS' -I/usr/local/include' + LDFLAGS=$LDFLAGS' -L/usr/local/lib' + ;; + *) + echo "Plattform not supported" + exit 1; + ;; +esac + +if [ "x$PREFIX" = "x/usr" ]; then + ETCDIR=/etc +else + ETCDIR=$PREFIX/etc +fi + +cat >> include.mk < + * + * This file is part of uAnytun. + * + * uAnytun is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 3 as + * published by the Free Software Foundation. + * + * uAnytun is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with uAnytun. If not, see . + */ + +#ifndef _DAEMON_H_ +#define _DAEMON_H_ + +#include +#include +#include +#include +#include +#include +#include + +struct priv_info_struct { + struct passwd* pw_; + struct group* gr_; +}; +typedef struct priv_info_struct priv_info_t; + +int priv_init(priv_info_t* priv, const char* username, const char* groupname) +{ + if(!priv) + return -1; + + priv->pw_ = NULL; + priv->gr_ = NULL; + + priv->pw_ = getpwnam(username); + if(!priv->pw_) { + log_printf(ERROR, "unkown user %s", username); + return -1; + } + + if(groupname) + priv->gr_ = getgrnam(groupname); + else + priv->gr_ = getgrgid(priv->pw_->pw_gid); + + if(!priv->gr_) { + log_printf(ERROR, "unkown group %s", groupname); + return -1; + } + + return 0; +} + +int priv_drop(priv_info_t* priv) +{ + if(!priv || !priv->pw_ || !priv->gr_) { + log_printf(ERROR, "privileges not initialized properly"); + return -1; + } + + if(setgid(priv->gr_->gr_gid)) { + log_printf(ERROR, "setgid('%s') failed: %s", priv->gr_->gr_name, strerror(errno)); + return -1; + } + + gid_t gr_list[1]; + gr_list[0] = priv->gr_->gr_gid; + if(setgroups (1, gr_list)) { + log_printf(ERROR, "setgroups(['%s']) failed: %s", priv->gr_->gr_name, strerror(errno)); + return -1; + } + + if(setuid(priv->pw_->pw_uid)) { + log_printf(ERROR, "setuid('%s') failed: %s", priv->pw_->pw_name, strerror(errno)); + return -1; + } + + log_printf(NOTICE, "dropped privileges to %s:%s", priv->pw_->pw_name, priv->gr_->gr_name); + return 0; +} + + +int do_chroot(const char* chrootdir) +{ + if(getuid() != 0) { + log_printf(ERROR, "this programm has to be run as root in order to run in a chroot"); + return -1; + } + + if(chroot(chrootdir)) { + log_printf(ERROR, "can't chroot to %s: %s", chrootdir, strerror(errno)); + return -1; + } + log_printf(NOTICE, "we are in chroot jail (%s) now", chrootdir); + if(chdir("/")) { + log_printf(ERROR, "can't change to /: %s", strerror(errno)); + return -1; + } +} + +void daemonize() +{ + pid_t pid; + + pid = fork(); + if(pid < 0) { + log_printf(ERROR, "daemonizing failed at fork(): %s, exitting", strerror(errno)); + exit(-1); + } + if(pid) exit(0); + + umask(0); + + if(setsid() < 0) { + log_printf(ERROR, "daemonizing failed at setsid(): %s, exitting", strerror(errno)); + exit(-1); + } + + pid = fork(); + if(pid < 0) { + log_printf(ERROR, "daemonizing failed at fork(): %s, exitting", strerror(errno)); + exit(-1); + } + if(pid) exit(0); + + if ((chdir("/")) < 0) { + log_printf(ERROR, "daemonizing failed at chdir(): %s, exitting", strerror(errno)); + exit(-1); + } + + int fd; + for (fd=0;fd<=2;fd++) // close all file descriptors + close(fd); + fd = open("/dev/null",O_RDWR); // stdin + if(fd == -1) + log_printf(WARNING, "can't open stdin (chroot and no link to /dev/null?)"); + else { + if(dup(fd) == -1) // stdout + log_printf(WARNING, "can't open stdout"); + if(dup(fd) == -1) // stderr + log_printf(WARNING, "can't open stderr"); + } + umask(027); +} + +#endif + diff --git a/door_daemon/datatypes.h b/door_daemon/datatypes.h new file mode 100644 index 0000000..3925f26 --- /dev/null +++ b/door_daemon/datatypes.h @@ -0,0 +1,79 @@ +/* + * uAnytun + * + * uAnytun is a tiny implementation of SATP. Unlike Anytun which is a full + * featured implementation uAnytun has no support for multiple connections + * or synchronisation. It is a small single threaded implementation intended + * to act as a client on small platforms. + * The secure anycast tunneling protocol (satp) defines a protocol used + * for communication between any combination of unicast and anycast + * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel + * mode and allows tunneling of every ETHER TYPE protocol (e.g. + * ethernet, ip, arp ...). satp directly includes cryptography and + * message authentication based on the methodes used by SRTP. It is + * intended to deliver a generic, scaleable and secure solution for + * tunneling and relaying of packets of any protocol. + * + * + * Copyright (C) 2007-2008 Christian Pointner + * + * This file is part of uAnytun. + * + * uAnytun is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 3 as + * published by the Free Software Foundation. + * + * uAnytun is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with uAnytun. If not, see . + */ + +#ifndef _DATATYPES_H_ +#define _DATATYPES_H_ + +#include +#include + +typedef uint8_t u_int8_t; +typedef uint16_t u_int16_t; +typedef uint32_t u_int32_t; +typedef uint64_t u_int64_t; +/* typedef int8_t int8_t; */ +/* typedef int16_t int16_t; */ +/* typedef int32_t int32_t; */ +/* typedef int64_t int64_t; */ + +typedef u_int32_t window_size_t; + +typedef u_int32_t seq_nr_t; +#define SEQ_NR_T_NTOH(a) ntohl(a) +#define SEQ_NR_T_HTON(a) htonl(a) +#define SEQ_NR_MAX UINT32_MAX + +typedef u_int16_t sender_id_t; +#define SENDER_ID_T_NTOH(a) ntohs(a) +#define SENDER_ID_T_HTON(a) htons(a) + +typedef u_int16_t payload_type_t; +#define PAYLOAD_TYPE_T_NTOH(a) ntohs(a) +#define PAYLOAD_TYPE_T_HTON(a) htons(a) + +typedef u_int16_t mux_t; +#define MUX_T_NTOH(a) ntohs(a) +#define MUX_T_HTON(a) htons(a) + +typedef u_int32_t satp_prf_label_t; +#define SATP_PRF_LABEL_T_NTOH(a) ntohl(a) +#define SATP_PRF_LABEL_T_HTON(a) htonl(a) + +struct buffer_struct { + u_int32_t length_; + u_int8_t* buf_; +}; +typedef struct buffer_struct buffer_t; + +#endif diff --git a/door_daemon/door_daemon.c b/door_daemon/door_daemon.c new file mode 100644 index 0000000..b88aa00 --- /dev/null +++ b/door_daemon/door_daemon.c @@ -0,0 +1,286 @@ +/* + * door_daemon + * + * Copyright (C) 2009 Christian Pointner + * + * This file is part of door_daemon. + * + * door_daemon is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 3 as + * published by the Free Software Foundation. + * + * door_daemon is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with door_daemon. If not, see . + */ + +#include "datatypes.h" + +#include +#include +#include +#include + +#include + +#include "log.h" +#include "sig_handler.h" +//#include "options.h" + +#include "daemon.h" +#include "sysexec.h" + +int process_cmd(int fd) +{ + log_printf(INFO, "processing command from %d", fd); + + char* buffer[100]; + int ret = 0; + do { + ret = recv(fd, buffer, sizeof(buffer), 0); + if(!ret) return 1; + } while (ret == -1 && errno == EINTR); + + return 0; +} + +int process_ttyusb(int ttyusb_fd) +{ + log_printf(INFO, "processing data from ttyusb (fd=%d)", ttyusb_fd); + + char* buffer[100]; + int ret = 0; + do { + ret = read(ttyusb_fd, buffer, sizeof(buffer)); + } while (ret == -1 && errno == EINTR); + + return 0; +} + + +int main_loop(int ttyusb_fd, int cmd_listen_fd) +{ + log_printf(INFO, "entering main loop"); + + fd_set readfds, tmpfds; + FD_ZERO(&readfds); + FD_SET(ttyusb_fd, &readfds); + FD_SET(cmd_listen_fd, &readfds); + int max_fd = ttyusb_fd > cmd_listen_fd ? ttyusb_fd : cmd_listen_fd; + + signal_init(); + int return_value = 0; + while(!return_value) { + memcpy(&tmpfds, &readfds, sizeof(tmpfds)); + + int ret = select(max_fd+1, &tmpfds, NULL, NULL, NULL); + if(ret == -1 && errno != EINTR) { + log_printf(ERROR, "select returned with error: %s", strerror(errno)); + return_value = -1; + break; + } + if(!ret) + continue; + + if(signal_exit) { + return_value = 1; + break; + } + + if(FD_ISSET(ttyusb_fd, &tmpfds)) { + return_value = process_ttyusb(ttyusb_fd); + if(return_value) + break; + + FD_CLR(ttyusb_fd, &tmpfds); + } + + if(FD_ISSET(cmd_listen_fd, &tmpfds)) { + int new_fd = accept(cmd_listen_fd, NULL, NULL); + if(new_fd < 0) { + log_printf(ERROR, "accept returned with error: %s", strerror(errno)); + return_value = -1; + break; + } + log_printf(INFO, "new command connection (fd=%d)", new_fd); + FD_SET(new_fd, &readfds); + max_fd = (max_fd < new_fd) ? new_fd : max_fd; + FD_CLR(cmd_listen_fd, &tmpfds); + } + + int fd; + for(fd = 0; fd <= max_fd; fd++) { + if(FD_ISSET(fd, &tmpfds)) { + return_value = process_cmd(fd); + if(return_value == 1) { + close(fd); + FD_CLR(fd, &readfds); + return_value = 0; + } + if(return_value) + break; + } + } + } + + return return_value; +} + +int main(int argc, char* argv[]) +{ + log_init(); + int ret = 0; + +/* options_t opt; */ +/* int ret = options_parse(&opt, argc, argv); */ +/* if(ret) { */ +/* if(ret > 0) { */ +/* fprintf(stderr, "syntax error near: %s\n\n", argv[ret]); */ +/* } */ +/* if(ret == -2) { */ +/* fprintf(stderr, "memory error on options_parse, exitting\n"); */ +/* } */ +/* if(ret == -3) { */ +/* fprintf(stderr, "syntax error: -4 and -6 are mutual exclusive\n\n"); */ +/* } */ +/* if(ret == -4) { */ +/* fprintf(stderr, "syntax error: unknown role name\n\n"); */ +/* } */ + +/* if(ret != -2) */ +/* options_print_usage(); */ + +/* options_clear(&opt); */ +/* log_close(); */ +/* exit(ret); */ +/* } */ +/* string_list_element_t* tmp = opt.log_targets_.first_; */ +/* if(!tmp) { */ +/* log_add_target("syslog:3,door_daemon,daemon"); */ +/* } */ +/* else { */ +/* while(tmp) { */ +/* ret = log_add_target(tmp->string_); */ +/* if(ret) { */ +/* switch(ret) { */ +/* case -2: fprintf(stderr, "memory error on log_add_target, exitting\n"); break; */ +/* case -3: fprintf(stderr, "unknown log target: '%s', exitting\n", tmp->string_); break; */ +/* case -4: fprintf(stderr, "this log target is only allowed once: '%s', exitting\n", tmp->string_); break; */ +/* default: fprintf(stderr, "syntax error near: '%s', exitting\n", tmp->string_); break; */ +/* } */ + +/* options_clear(&opt); */ +/* log_close(); */ +/* exit(ret); */ +/* } */ +/* tmp = tmp->next_; */ +/* } */ +/* } */ + log_add_target("stdout:5"); + log_printf(NOTICE, "just started..."); +/* options_parse_post(&opt); */ + +/* priv_info_t priv; */ +/* if(opt.username_) */ +/* if(priv_init(&priv, opt.username_, opt.groupname_)) { */ +/* options_clear(&opt); */ +/* log_close(); */ +/* exit(-1); */ +/* } */ + + int ttyusb_fd = open("/dev/ttyUSB0", O_RDWR); + if(ttyusb_fd < 0) { + log_printf(ERROR, "unable to open /dev/ttyUSB0: %s", strerror(errno)); +/* options_clear(&opt); */ + log_close(); + exit(-1); + } + + int cmd_listen_fd = socket(AF_UNIX, SOCK_STREAM, 0); + struct sockaddr_un local; + int len; + if(cmd_listen_fd < 0) { + log_printf(ERROR, "unable to open socket: %s", strerror(errno)); + close(ttyusb_fd); +/* options_clear(&opt); */ + log_close(); + exit(-1); + } + local.sun_family = AF_UNIX; + strcpy(local.sun_path, "sock"); + unlink(local.sun_path); + len = SUN_LEN(&local); + ret = bind(cmd_listen_fd, (struct sockaddr*)&local, len); + if(ret) { + log_printf(ERROR, "unable to bind to '%s': %s", local.sun_path, strerror(errno)); + close(cmd_listen_fd); + close(ttyusb_fd); +/* options_clear(&opt); */ + log_close(); + exit(-1); + } + + ret = listen(cmd_listen_fd, 4); + if(ret) { + log_printf(ERROR, "unable to listen on command socket: %s", local.sun_path, strerror(errno)); + close(cmd_listen_fd); + close(ttyusb_fd); +/* options_clear(&opt); */ + log_close(); + exit(-1); + } + +/* FILE* pid_file = NULL; */ +/* if(opt.pid_file_) { */ +/* pid_file = fopen(opt.pid_file_, "w"); */ +/* if(!pid_file) { */ +/* log_printf(WARNING, "unable to open pid file: %s", strerror(errno)); */ +/* } */ +/* } */ + +/* if(opt.chroot_dir_) */ +/* if(do_chroot(opt.chroot_dir_)) { */ +/* options_clear(&opt); */ +/* log_close(); */ +/* exit(-1); */ +/* } */ +/* if(opt.username_) */ +/* if(priv_drop(&priv)) { */ +/* options_clear(&opt); */ +/* log_close(); */ +/* exit(-1); */ +/* } */ + +/* if(opt.daemonize_) { */ +/* pid_t oldpid = getpid(); */ +/* daemonize(); */ +/* log_printf(INFO, "running in background now (old pid: %d)", oldpid); */ +/* } */ + +/* if(pid_file) { */ +/* pid_t pid = getpid(); */ +/* fprintf(pid_file, "%d", pid); */ +/* fclose(pid_file); */ +/* } */ + + ret = main_loop(ttyusb_fd, cmd_listen_fd); + + close(cmd_listen_fd); + close(ttyusb_fd); +/* options_clear(&opt); */ + + if(!ret) + log_printf(NOTICE, "normal shutdown"); + else if(ret < 0) + log_printf(NOTICE, "shutdown after error"); + else + log_printf(NOTICE, "shutdown after signal"); + + log_close(); + + return ret; +} diff --git a/door_daemon/log.c b/door_daemon/log.c new file mode 100644 index 0000000..847baf7 --- /dev/null +++ b/door_daemon/log.c @@ -0,0 +1,258 @@ +/* + * uAnytun + * + * uAnytun is a tiny implementation of SATP. Unlike Anytun which is a full + * featured implementation uAnytun has no support for multiple connections + * or synchronisation. It is a small single threaded implementation intended + * to act as a client on small platforms. + * The secure anycast tunneling protocol (satp) defines a protocol used + * for communication between any combination of unicast and anycast + * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel + * mode and allows tunneling of every ETHER TYPE protocol (e.g. + * ethernet, ip, arp ...). satp directly includes cryptography and + * message authentication based on the methodes used by SRTP. It is + * intended to deliver a generic, scaleable and secure solution for + * tunneling and relaying of packets of any protocol. + * + * + * Copyright (C) 2007-2008 Christian Pointner + * + * This file is part of uAnytun. + * + * uAnytun is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 3 as + * published by the Free Software Foundation. + * + * uAnytun is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with uAnytun. If not, see . + */ + +#include "datatypes.h" + +#include +#include +#include +#include + +#define SYSLOG_NAMES +#include + +#include "log.h" + +log_t stdlog; + +#include "log_targets.h" + +const char* log_prio_to_string(log_prio_t prio) +{ + switch(prio) { + case ERROR: return "ERROR"; + case WARNING: return "WARNING"; + case NOTICE: return "NOTICE"; + case INFO: return "INFO"; + case DEBUG: return "DEBUG"; + } + return "UNKNOWN"; +} + +log_target_type_t log_target_parse_type(const char* conf) +{ + if(!conf) + return TARGET_UNKNOWN; + + if(!strncmp(conf, "syslog", 6)) return TARGET_SYSLOG; + if(!strncmp(conf, "file", 4)) return TARGET_FILE; + if(!strncmp(conf, "stdout", 6)) return TARGET_STDOUT; + if(!strncmp(conf, "stderr", 6)) return TARGET_STDERR; + + return TARGET_UNKNOWN; +} + +int log_targets_target_exists(log_targets_t* targets, log_target_type_t type) +{ + if(!targets && !targets->first_) + return 0; + + log_target_t* tmp = targets->first_; + while(tmp) { + if(tmp->type_ == type) + return 1; + tmp = tmp->next_; + } + return 0; +} + +int log_targets_add(log_targets_t* targets, const char* conf) +{ + if(!targets) + return -1; + + log_target_t* new_target = NULL; + int duplicates_allowed = 0; + switch(log_target_parse_type(conf)) { + case TARGET_SYSLOG: new_target = log_target_syslog_new(); break; + case TARGET_FILE: new_target = log_target_file_new(); duplicates_allowed = 1; break; + case TARGET_STDOUT: new_target = log_target_stdout_new(); break; + case TARGET_STDERR: new_target = log_target_stderr_new(); break; + default: return -3; + } + if(!new_target) + return -2; + + if(!duplicates_allowed && log_targets_target_exists(targets, new_target->type_)) { + free(new_target); + return -4; + } + + const char* prioptr = strchr(conf, ':'); + if(!prioptr || prioptr[1] == 0) { + free(new_target); + return -1; + } + prioptr++; + if(!isdigit(prioptr[0]) || (prioptr[1] != 0 && prioptr[1] != ',')) { + free(new_target); + return -1; + } + new_target->max_prio_ = prioptr[0] - '0'; + if(new_target->max_prio_ > 0) + new_target->enabled_ = 1; + + if(new_target->init != NULL) { + const char* confptr = NULL; + if(prioptr[1] != 0) + confptr = prioptr+2; + + int ret = (*new_target->init)(new_target, confptr); + if(ret) { + free(new_target); + return ret; + } + } + + if(new_target->open != NULL) + (*new_target->open)(new_target); + + + if(!targets->first_) { + targets->first_ = new_target; + } + else { + log_target_t* tmp = targets->first_; + while(tmp->next_) + tmp = tmp->next_; + + tmp->next_ = new_target; + } + return 0; +} + +void log_targets_log(log_targets_t* targets, log_prio_t prio, const char* msg) +{ + if(!targets) + return; + + log_target_t* tmp = targets->first_; + while(tmp) { + if(tmp->log != NULL && tmp->enabled_ && tmp->max_prio_ >= prio) + (*tmp->log)(tmp, prio, msg); + + tmp = tmp->next_; + } +} + +void log_targets_clear(log_targets_t* targets) +{ + if(!targets) + return; + + while(targets->first_) { + log_target_t* tmp = targets->first_; + targets->first_ = tmp->next_; + if(tmp->close != NULL) + (*tmp->close)(tmp); + if(tmp->clear != NULL) + (*tmp->clear)(tmp); + free(tmp); + } +} + + +void log_init() +{ + stdlog.max_prio_ = 0; + stdlog.targets_.first_ = NULL; +} + +void log_close() +{ + log_targets_clear(&stdlog.targets_); +} + +void update_max_prio() +{ + log_target_t* tmp = stdlog.targets_.first_; + while(tmp) { + if(tmp->enabled_ && tmp->max_prio_ > stdlog.max_prio_) + stdlog.max_prio_ = tmp->max_prio_; + + tmp = tmp->next_; + } +} + +int log_add_target(const char* conf) +{ + if(!conf) + return -1; + + int ret = log_targets_add(&stdlog.targets_, conf); + if(!ret) update_max_prio(); + return ret; +} + +void log_printf(log_prio_t prio, const char* fmt, ...) +{ + if(stdlog.max_prio_ < prio) + return; + + static char msg[MSG_LENGTH_MAX]; + va_list args; + + va_start(args, fmt); + vsnprintf(msg, MSG_LENGTH_MAX, fmt, args); + va_end(args); + + log_targets_log(&stdlog.targets_, prio, msg); +} + +void log_print_hex_dump(log_prio_t prio, const u_int8_t* buf, u_int32_t len) +{ + if(stdlog.max_prio_ < prio) + return; + + static char msg[MSG_LENGTH_MAX]; + + if(!buf) { + snprintf(msg, MSG_LENGTH_MAX, "(NULL)"); + } + else { + u_int32_t i; + int offset = snprintf(msg, MSG_LENGTH_MAX, "dump(%d): ", len); + if(offset < 0) + return; + u_int8_t* ptr = &msg[offset]; + + for(i=0; i < len; i++) { + if(((i+1)*3) >= (MSG_LENGTH_MAX - offset)) + break; + sprintf(ptr, "%02X ", buf[i]); + ptr+=3; + } + } + log_targets_log(&stdlog.targets_, prio, msg); +} diff --git a/door_daemon/log.h b/door_daemon/log.h new file mode 100644 index 0000000..46ea867 --- /dev/null +++ b/door_daemon/log.h @@ -0,0 +1,89 @@ +/* + * uAnytun + * + * uAnytun is a tiny implementation of SATP. Unlike Anytun which is a full + * featured implementation uAnytun has no support for multiple connections + * or synchronisation. It is a small single threaded implementation intended + * to act as a client on small platforms. + * The secure anycast tunneling protocol (satp) defines a protocol used + * for communication between any combination of unicast and anycast + * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel + * mode and allows tunneling of every ETHER TYPE protocol (e.g. + * ethernet, ip, arp ...). satp directly includes cryptography and + * message authentication based on the methodes used by SRTP. It is + * intended to deliver a generic, scaleable and secure solution for + * tunneling and relaying of packets of any protocol. + * + * + * Copyright (C) 2007-2008 Christian Pointner + * + * This file is part of uAnytun. + * + * uAnytun is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 3 as + * published by the Free Software Foundation. + * + * uAnytun is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with uAnytun. If not, see . + */ + +#ifndef _LOG_H_ +#define _LOG_H_ + +#define MSG_LENGTH_MAX 150 + +enum log_prio_enum { ERROR = 1, WARNING = 2, NOTICE = 3, + INFO = 4, DEBUG = 5 }; +typedef enum log_prio_enum log_prio_t; + +const char* log_prio_to_string(log_prio_t prio); + +enum log_target_type_enum { TARGET_SYSLOG , TARGET_STDOUT, TARGET_STDERR, TARGET_FILE , TARGET_UNKNOWN }; +typedef enum log_target_type_enum log_target_type_t; + +struct log_target_struct { + log_target_type_t type_; + int (*init)(struct log_target_struct* self, const char* conf); + void (*open)(struct log_target_struct* self); + void (*log)(struct log_target_struct* self, log_prio_t prio, const char* msg); + void (*close)(struct log_target_struct* self); + void (*clear)(struct log_target_struct* self); + int opened_; + int enabled_; + log_prio_t max_prio_; + void* param_; + struct log_target_struct* next_; +}; +typedef struct log_target_struct log_target_t; + + +struct log_targets_struct { + log_target_t* first_; +}; +typedef struct log_targets_struct log_targets_t; + +int log_targets_target_exists(log_targets_t* targets, log_target_type_t type); +int log_targets_add(log_targets_t* targets, const char* conf); +void log_targets_log(log_targets_t* targets, log_prio_t prio, const char* msg); +void log_targets_clear(log_targets_t* targets); + + +struct log_struct { + log_prio_t max_prio_; + log_targets_t targets_; +}; +typedef struct log_struct log_t; + +void log_init(); +void log_close(); +void update_max_prio(); +int log_add_target(const char* conf); +void log_printf(log_prio_t prio, const char* fmt, ...); +void log_print_hex_dump(log_prio_t prio, const u_int8_t* buf, u_int32_t len); + +#endif diff --git a/door_daemon/log_targets.h b/door_daemon/log_targets.h new file mode 100644 index 0000000..0ea8e83 --- /dev/null +++ b/door_daemon/log_targets.h @@ -0,0 +1,336 @@ +/* + * uAnytun + * + * uAnytun is a tiny implementation of SATP. Unlike Anytun which is a full + * featured implementation uAnytun has no support for multiple connections + * or synchronisation. It is a small single threaded implementation intended + * to act as a client on small platforms. + * The secure anycast tunneling protocol (satp) defines a protocol used + * for communication between any combination of unicast and anycast + * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel + * mode and allows tunneling of every ETHER TYPE protocol (e.g. + * ethernet, ip, arp ...). satp directly includes cryptography and + * message authentication based on the methodes used by SRTP. It is + * intended to deliver a generic, scaleable and secure solution for + * tunneling and relaying of packets of any protocol. + * + * + * Copyright (C) 2007-2008 Christian Pointner + * + * This file is part of uAnytun. + * + * uAnytun is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 3 as + * published by the Free Software Foundation. + * + * uAnytun is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with uAnytun. If not, see . + */ + +enum syslog_facility_enum { USER = LOG_USER, MAIL = LOG_MAIL, + DAEMON = LOG_DAEMON, AUTH = LOG_AUTH, + SYSLOG = LOG_SYSLOG, LPR = LOG_LPR, + NEWS = LOG_NEWS, UUCP = LOG_UUCP, + CRON = LOG_CRON, AUTHPRIV = LOG_AUTHPRIV, + FTP = LOG_FTP, LOCAL0 = LOG_LOCAL0, + LOCAL1 = LOG_LOCAL1, LOCAL2 = LOG_LOCAL2, + LOCAL3 = LOG_LOCAL3, LOCAL4 = LOG_LOCAL4, + LOCAL5 = LOG_LOCAL5, LOCAL6 = LOG_LOCAL6, + LOCAL7 = LOG_LOCAL7 }; +typedef enum syslog_facility_enum syslog_facility_t; + +struct log_target_syslog_param_struct { + char* logname_; + syslog_facility_t facility_; +}; +typedef struct log_target_syslog_param_struct log_target_syslog_param_t; + +int log_target_syslog_init(log_target_t* self, const char* conf) +{ + if(!self || (conf && conf[0] == 0)) + return -1; + + self->param_ = malloc(sizeof(log_target_syslog_param_t)); + if(!self->param_) + return -2; + + char* logname; + const char* end = NULL; + if(!conf) + logname = strdup("uanytun"); + else { + end = strchr(conf, ','); + if(end) { + size_t len = (size_t)(end - conf); + if(!len) { + free(self->param_); + return -1; + } + logname = malloc(len+1); + if(logname) { + strncpy(logname, conf, len); + logname[len] = 0; + } + } + else + logname = strdup(conf); + } + + if(!logname) { + free(self->param_); + return -2; + } + ((log_target_syslog_param_t*)(self->param_))->logname_ = logname; + + if(!end) { + ((log_target_syslog_param_t*)(self->param_))->facility_ = DAEMON; + return 0; + } + + if(end[1] == 0 || end[1] == ',') { + free(logname); + free(self->param_); + return -1; + } + + const char* start = end + 1; + end = strchr(start, ','); + int i; + for(i=0;;++i) { + if(facilitynames[i].c_name == NULL) { + free(logname); + free(self->param_); + return -1; + } + + if(( end && !strncmp(start, facilitynames[i].c_name, (size_t)(end - start)) && facilitynames[i].c_name[(size_t)(end-start)] == 0) || + (!end && !strcmp(start, facilitynames[i].c_name))) { + ((log_target_syslog_param_t*)(self->param_))->facility_ = facilitynames[i].c_val; + break; + } + } + + return 0; +} + +void log_target_syslog_open(log_target_t* self) +{ + if(!self || !self->param_) + return; + + openlog(((log_target_syslog_param_t*)(self->param_))->logname_, LOG_PID, ((log_target_syslog_param_t*)(self->param_))->facility_); + self->opened_ = 1; +} + +void log_target_syslog_log(log_target_t* self, log_prio_t prio, const char* msg) +{ + if(!self || !self->param_ || !self->opened_) + return; + + syslog((prio + 2) | ((log_target_syslog_param_t*)(self->param_))->facility_, "%s", msg); +} + +void log_target_syslog_close(log_target_t* self) +{ + closelog(); + self->opened_ = 0; +} + +void log_target_syslog_clear(log_target_t* self) +{ + if(!self || !self->param_) + return; + + if(((log_target_syslog_param_t*)(self->param_))->logname_) + free(((log_target_syslog_param_t*)(self->param_))->logname_); + + free(self->param_); +} + +log_target_t* log_target_syslog_new() +{ + log_target_t* tmp = malloc(sizeof(log_target_t)); + if(!tmp) + return NULL; + + tmp->type_ = TARGET_SYSLOG; + tmp->init = &log_target_syslog_init; + tmp->open = &log_target_syslog_open; + tmp->log = &log_target_syslog_log; + tmp->close = &log_target_syslog_close; + tmp->clear = &log_target_syslog_clear; + tmp->opened_ = 0; + tmp->enabled_ = 0; + tmp->max_prio_ = NOTICE; + tmp->param_ = NULL; + tmp->next_ = NULL; + + return tmp; +} + + +struct log_target_file_param_struct { + char* logfilename_; + FILE* file_; +}; +typedef struct log_target_file_param_struct log_target_file_param_t; + +int log_target_file_init(log_target_t* self, const char* conf) +{ + if(!self || (conf && conf[0] == 0)) + return -1; + + self->param_ = malloc(sizeof(log_target_file_param_t)); + if(!self->param_) + return -2; + + char* logfilename; + if(!conf) + logfilename = strdup("uanytun.log"); + else { + const char* end = strchr(conf, ','); + if(end) { + size_t len = (size_t)(end - conf); + if(!len) { + free(self->param_); + return -1; + } + logfilename = malloc(len+1); + if(logfilename) { + strncpy(logfilename, conf, len); + logfilename[len] = 0; + } + } + else + logfilename = strdup(conf); + } + + if(!logfilename) { + free(self->param_); + return -2; + } + ((log_target_file_param_t*)(self->param_))->logfilename_ = logfilename; + ((log_target_file_param_t*)(self->param_))->file_ = NULL; + + return 0; +} + +void log_target_file_open(log_target_t* self) +{ + if(!self || !self->param_) + return; + + ((log_target_file_param_t*)(self->param_))->file_ = fopen(((log_target_file_param_t*)(self->param_))->logfilename_, "w"); + if(((log_target_file_param_t*)(self->param_))->file_) + self->opened_ = 1; +} + +void log_target_file_log(log_target_t* self, log_prio_t prio, const char* msg) +{ + if(!self || !self->param_ || !self->opened_) + return; + + fprintf(((log_target_file_param_t*)(self->param_))->file_, "%s-%s\n", log_prio_to_string(prio), msg); + fflush(((log_target_file_param_t*)(self->param_))->file_); +} + +void log_target_file_close(log_target_t* self) +{ + if(!self || !self->param_) + return; + + fclose(((log_target_file_param_t*)(self->param_))->file_); + self->opened_ = 0; +} + +void log_target_file_clear(log_target_t* self) +{ + if(!self || !self->param_) + return; + + if(((log_target_file_param_t*)(self->param_))->logfilename_) + free(((log_target_file_param_t*)(self->param_))->logfilename_); + + free(self->param_); +} + + +log_target_t* log_target_file_new() +{ + log_target_t* tmp = malloc(sizeof(log_target_t)); + if(!tmp) + return NULL; + + tmp->type_ = TARGET_FILE; + tmp->init = &log_target_file_init; + tmp->open = &log_target_file_open; + tmp->log = &log_target_file_log; + tmp->close = &log_target_file_close; + tmp->clear = &log_target_file_clear; + tmp->opened_ = 0; + tmp->enabled_ = 0; + tmp->max_prio_ = NOTICE; + tmp->param_ = NULL; + tmp->next_ = NULL; + + return tmp; +} + + +void log_target_stdout_log(log_target_t* self, log_prio_t prio, const char* msg) +{ + printf("%s-%s\n", log_prio_to_string(prio), msg); +} + +log_target_t* log_target_stdout_new() +{ + log_target_t* tmp = malloc(sizeof(log_target_t)); + if(!tmp) + return NULL; + + tmp->type_ = TARGET_STDOUT; + tmp->init = NULL; + tmp->open = NULL; + tmp->log = &log_target_stdout_log; + tmp->close = NULL; + tmp->clear = NULL; + tmp->opened_ = 0; + tmp->enabled_ = 0; + tmp->max_prio_ = NOTICE; + tmp->param_ = NULL; + tmp->next_ = NULL; + + return tmp; +} + + +void log_target_stderr_log(log_target_t* self, log_prio_t prio, const char* msg) +{ + fprintf(stderr, "%s-%s\n", log_prio_to_string(prio), msg); +} + +log_target_t* log_target_stderr_new() +{ + log_target_t* tmp = malloc(sizeof(log_target_t)); + if(!tmp) + return NULL; + + tmp->type_ = TARGET_STDERR; + tmp->init = NULL; + tmp->open = NULL; + tmp->log = &log_target_stderr_log; + tmp->close = NULL; + tmp->clear = NULL; + tmp->opened_ = 0; + tmp->enabled_ = 0; + tmp->max_prio_ = NOTICE; + tmp->param_ = NULL; + tmp->next_ = NULL; + + return tmp; +} diff --git a/door_daemon/options.c b/door_daemon/options.c new file mode 100644 index 0000000..2300794 --- /dev/null +++ b/door_daemon/options.c @@ -0,0 +1,510 @@ +/* + * uAnytun + * + * uAnytun is a tiny implementation of SATP. Unlike Anytun which is a full + * featured implementation uAnytun has no support for multiple connections + * or synchronisation. It is a small single threaded implementation intended + * to act as a client on small platforms. + * The secure anycast tunneling protocol (satp) defines a protocol used + * for communication between any combination of unicast and anycast + * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel + * mode and allows tunneling of every ETHER TYPE protocol (e.g. + * ethernet, ip, arp ...). satp directly includes cryptography and + * message authentication based on the methodes used by SRTP. It is + * intended to deliver a generic, scaleable and secure solution for + * tunneling and relaying of packets of any protocol. + * + * + * Copyright (C) 2007-2008 Christian Pointner + * + * This file is part of uAnytun. + * + * uAnytun is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 3 as + * published by the Free Software Foundation. + * + * uAnytun is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with uAnytun. If not, see . + */ + +#include "datatypes.h" + +#include "options.h" + +#include +#include +#include +#include + +#include "log.h" + +#ifndef NO_CRYPT +#include "auth_algo.h" +#endif + +#define PARSE_BOOL_PARAM(SHORT, LONG, VALUE) \ + else if(!strcmp(str,SHORT) || !strcmp(str,LONG)) \ + VALUE = 1; + +#define PARSE_INVERSE_BOOL_PARAM(SHORT, LONG, VALUE) \ + else if(!strcmp(str,SHORT) || !strcmp(str,LONG)) \ + VALUE = 0; + +#define PARSE_INT_PARAM(SHORT, LONG, VALUE) \ + else if(!strcmp(str,SHORT) || !strcmp(str,LONG)) \ + { \ + if(argc < 1) \ + return i; \ + VALUE = atoi(argv[i+1]); \ + argc--; \ + i++; \ + } + +#define PARSE_STRING_PARAM(SHORT, LONG, VALUE) \ + else if(!strcmp(str,SHORT) || !strcmp(str,LONG)) \ + { \ + if(argc < 1 || argv[i+1][0] == '-') \ + return i; \ + if(VALUE) free(VALUE); \ + VALUE = strdup(argv[i+1]); \ + if(!VALUE) \ + return -2; \ + argc--; \ + i++; \ + } + +#define PARSE_STRING_PARAM_SEC(SHORT, LONG, VALUE) \ + else if(!strcmp(str,SHORT) || !strcmp(str,LONG)) \ + { \ + if(argc < 1 || argv[i+1][0] == '-') \ + return i; \ + if(VALUE) free(VALUE); \ + VALUE = strdup(argv[i+1]); \ + if(!VALUE) \ + return -2; \ + size_t j; \ + for(j=0; j < strlen(argv[i+1]); ++j) \ + argv[i+1][j] = '#'; \ + argc--; \ + i++; \ + } + +#define PARSE_IFCONFIG_PARAM(SHORT, LONG, VALUE) \ + else if(!strcmp(str,SHORT) || !strcmp(str,LONG)) \ + { \ + if(argc < 1 || argv[i+1][0] == '-') \ + return i; \ + int ret; \ + ret = options_parse_ifconfig(argv[i+1], &VALUE); \ + if(ret > 0) \ + return i+1; \ + if(ret < 0) \ + return ret; \ + argc--; \ + i++; \ + } + +#define PARSE_HEXSTRING_PARAM_SEC(SHORT, LONG, VALUE) \ + else if(!strcmp(str,SHORT) || !strcmp(str,LONG)) \ + { \ + if(argc < 1 || argv[i+1][0] == '-') \ + return i; \ + int ret; \ + ret = options_parse_hex_string(argv[i+1], &VALUE); \ + if(ret > 0) \ + return i+1; \ + else if(ret < 0) \ + return ret; \ + size_t j; \ + for(j=0; j < strlen(argv[i+1]); ++j) \ + argv[i+1][j] = '#'; \ + argc--; \ + i++; \ + } + +#define PARSE_STRING_LIST(SHORT, LONG, LIST) \ + else if(!strcmp(str,SHORT) || !strcmp(str,LONG)) \ + { \ + if(argc < 1 || argv[i+1][0] == '-') \ + return i; \ + int ret = string_list_add(&LIST, argv[i+1]); \ + if(ret == -2) \ + return ret; \ + else if(ret) \ + return i+1; \ + argc--; \ + i++; \ + } + +int options_parse_hex_string(const char* hex, buffer_t* buffer) +{ + if(!hex || !buffer) + return -1; + + u_int32_t hex_len = strlen(hex); + if(hex_len%2) + return 1; + + if(buffer->buf_) + free(buffer->buf_); + + buffer->length_ = hex_len/2; + buffer->buf_ = malloc(buffer->length_); + if(!buffer->buf_) { + buffer->length_ = 0; + return -2; + } + + const char* ptr = hex; + int i; + for(i=0;ilength_;++i) { + u_int32_t tmp; + sscanf(ptr, "%2X", &tmp); + buffer->buf_[i] = (u_int8_t)tmp; + ptr += 2; + } + + return 0; +} + +int options_parse_ifconfig(const char* arg, ifconfig_param_t* ifcfg) +{ + char* str = strdup(arg); + if(!str) + return -2; + + char* ptr = str; + for(;*ptr;++ptr) { + if(*ptr == '/') { + *ptr = 0; + ptr++; + if(!(*ptr)) { + free(str); + return 1; + } + + ifcfg->prefix_length_ = atoi(ptr); + ifcfg->net_addr_ = strdup(str); + free(str); + + if(!ifcfg->net_addr_) + return -2; + + return 0; + } + if(!isdigit(*ptr) && *ptr != '.') { + free(str); + return 1; + } + } + + free(str); + return 1; +} + + +int options_parse(options_t* opt, int argc, char* argv[]) +{ + if(!opt) + return -1; + + options_default(opt); + + if(opt->progname_) + free(opt->progname_); + opt->progname_ = strdup(argv[0]); + if(!opt->progname_) + return -2; + + argc--; + + char* role = NULL; + int i, ipv4_only = 0, ipv6_only = 0; + for(i=1; argc > 0; ++i) + { + char* str = argv[i]; + argc--; + + if(!strcmp(str,"-h") || !strcmp(str,"--help")) + return -1; + PARSE_INVERSE_BOOL_PARAM("-D","--nodaemonize", opt->daemonize_) + PARSE_STRING_PARAM("-u","--username", opt->username_) + PARSE_STRING_PARAM("-g","--groupname", opt->groupname_) + PARSE_STRING_PARAM("-C","--chroot", opt->chroot_dir_) + PARSE_STRING_PARAM("-P","--write-pid", opt->pid_file_) + PARSE_STRING_PARAM("-i","--interface", opt->local_addr_) + PARSE_STRING_PARAM("-p","--port", opt->local_port_) + PARSE_INT_PARAM("-s","--sender-id", opt->sender_id_) + PARSE_STRING_LIST("-L","--log", opt->log_targets_) + PARSE_STRING_PARAM("-r","--remote-host", opt->remote_addr_) + PARSE_STRING_PARAM("-o","--remote-port", opt->remote_port_) + PARSE_BOOL_PARAM("-4","--ipv4-only", ipv4_only) + PARSE_BOOL_PARAM("-6","--ipv6-only", ipv6_only) + PARSE_STRING_PARAM("-d","--dev", opt->dev_name_) + PARSE_STRING_PARAM("-t","--type", opt->dev_type_) + PARSE_IFCONFIG_PARAM("-n","--ifconfig", opt->ifconfig_param_) + PARSE_STRING_PARAM("-x","--post-up-script", opt->post_up_script_) + PARSE_INT_PARAM("-m","--mux", opt->mux_) + PARSE_INT_PARAM("-w","--window-size", opt->seq_window_size_) +#ifndef NO_CRYPT + PARSE_STRING_PARAM("-k","--kd-prf", opt->kd_prf_) +#ifndef NO_PASSPHRASE + PARSE_STRING_PARAM_SEC("-E","--passphrase", opt->passphrase_) +#endif + PARSE_STRING_PARAM("-e","--role", role) + PARSE_HEXSTRING_PARAM_SEC("-K","--key", opt->key_) + PARSE_HEXSTRING_PARAM_SEC("-A","--salt", opt->salt_) + PARSE_STRING_PARAM("-c","--cipher", opt->cipher_) + PARSE_STRING_PARAM("-a","--auth-algo", opt->auth_algo_) + PARSE_INT_PARAM("-b","--auth-tag-length", opt->auth_tag_length_) +#endif + else + return i; + } + if(ipv4_only && ipv6_only) + return -3; + if(ipv4_only) + opt->resolv_addr_type_ = IPV4_ONLY; + if(ipv6_only) + opt->resolv_addr_type_ = IPV6_ONLY; + + if(role) { + if(!strcmp(role, "alice") || !strcmp(role, "server") || !strcmp(role, "left")) + opt->role_ = ROLE_LEFT; + else if(!strcmp(role, "bob") || !strcmp(role, "client") || !strcmp(role, "right")) + opt->role_ = ROLE_RIGHT; + else { + free(role); + return -4; + } + free(role); + } + return 0; +} + +void options_parse_post(options_t* opt) +{ + if(!opt) + return; + +#ifdef NO_V4MAPPED + if(opt->resolv_addr_type_ == ANY) { + opt->resolv_addr_type_ = IPV4_ONLY; + log_printf(WARNING, "No support for V4-mapped Adresses on this platform, defaulting to only use IPv4 addresses"); + } +#endif + +#ifndef NO_CRYPT + if(!strcmp(opt->cipher_, "null") && !strcmp(opt->auth_algo_, "null") && + strcmp(opt->kd_prf_, "null")) { + if(opt->kd_prf_) + free(opt->kd_prf_); + opt->kd_prf_ = strdup("null"); + } + if((strcmp(opt->cipher_, "null") || strcmp(opt->auth_algo_, "null")) && + !strcmp(opt->kd_prf_, "null")) { + log_printf(WARNING, "using NULL key derivation with encryption and or authentication enabled!"); + } + + u_int32_t tag_len_max = auth_algo_get_max_length(opt->auth_algo_); + if(!tag_len_max) opt->auth_tag_length_ = 0; + else if(tag_len_max < opt->auth_tag_length_) { + log_printf(WARNING, "%s auth algo can't generate tags of length %d, using maximum tag length(%d)", opt->auth_algo_, opt->auth_tag_length_, tag_len_max); + opt->auth_tag_length_ = tag_len_max; + } +#endif + + if(!(opt->dev_name_) && !(opt->dev_type_)) + opt->dev_type_ = strdup("tun"); +} + +void options_default(options_t* opt) +{ + if(!opt) + return; + + opt->progname_ = strdup("uanytun"); + opt->daemonize_ = 1; + opt->username_ = NULL; + opt->groupname_ = NULL; + opt->chroot_dir_ = NULL; + opt->pid_file_ = NULL; + string_list_init(&opt->log_targets_); + opt->local_addr_ = NULL; + opt->local_port_ = strdup("4444"); + opt->sender_id_ = 0; + opt->remote_addr_ = NULL; + opt->remote_port_ = strdup("4444"); + opt->resolv_addr_type_ = ANY; + opt->dev_name_ = NULL; + opt->dev_type_ = NULL; + opt->ifconfig_param_.net_addr_ = NULL; + opt->ifconfig_param_.prefix_length_ = 0; + opt->post_up_script_ = NULL; + opt->mux_ = 0; + opt->seq_window_size_ = 0; +#ifndef NO_CRYPT + opt->kd_prf_ = strdup("aes-ctr"); + opt->passphrase_ = NULL; + opt->role_ = ROLE_LEFT; + opt->cipher_ = strdup("aes-ctr"); + opt->auth_algo_ = strdup("sha1"); + opt->auth_tag_length_ = 10; +#else + opt->cipher_ = strdup("null"); + opt->auth_tag_length_ = 0; +#endif + opt->key_.buf_ = NULL; + opt->key_.length_ = 0; + opt->salt_.buf_ = NULL; + opt->salt_.length_ = 0; +} + +void options_clear(options_t* opt) +{ + if(!opt) + return; + + if(opt->progname_) + free(opt->progname_); + if(opt->username_) + free(opt->username_); + if(opt->groupname_) + free(opt->groupname_); + if(opt->chroot_dir_) + free(opt->chroot_dir_); + if(opt->pid_file_) + free(opt->pid_file_); + string_list_clear(&opt->log_targets_); + if(opt->local_addr_) + free(opt->local_addr_); + if(opt->local_port_) + free(opt->local_port_); + if(opt->remote_addr_) + free(opt->remote_addr_); + if(opt->remote_port_) + free(opt->remote_port_); + if(opt->dev_name_) + free(opt->dev_name_); + if(opt->dev_type_) + free(opt->dev_type_); + if(opt->ifconfig_param_.net_addr_) + free(opt->ifconfig_param_.net_addr_); + if(opt->post_up_script_) + free(opt->post_up_script_); + if(opt->cipher_) + free(opt->cipher_); +#ifndef NO_CRYPT + if(opt->auth_algo_) + free(opt->auth_algo_); + if(opt->kd_prf_) + free(opt->kd_prf_); + if(opt->passphrase_) + free(opt->passphrase_); +#endif + if(opt->key_.buf_) + free(opt->key_.buf_); + if(opt->salt_.buf_) + free(opt->salt_.buf_); +} + +void options_print_usage() +{ + printf("USAGE:\n"); + printf("uanytun [-h|--help] prints this...\n"); + printf(" [-D|--nodaemonize] don't run in background\n"); + printf(" [-u|--username] change to this user\n"); + printf(" [-g|--groupname] change to this group\n"); + printf(" [-C|--chroot] chroot to this directory\n"); + printf(" [-P|--write-pid] write pid to this file\n"); + printf(" [-i|--interface] local ip address to bind to\n"); + printf(" [-p|--port] local port to bind to\n"); + printf(" [-s|--sender-id ] the sender id to use\n"); + printf(" [-L|--log] :[,[,..]]\n"); + printf(" add a log target, can be invoked several times\n"); + + printf(" [-r|--remote-host] remote host\n"); + printf(" [-o|--remote-port] remote port\n"); + printf(" [-4|--ipv4-only] always resolv IPv4 addresses\n"); + printf(" [-6|--ipv6-only] always resolv IPv6 addresses\n"); + printf(" [-d|--dev] device name\n"); + printf(" [-t|--type] device type\n"); + + printf(" [-n|--ifconfig] / the local address for the tun/tap device and the used prefix length\n"); + printf(" [-x|--post-up-script]