From 97e4bce33f2199dd3ea3831f96e2b6d34269d5a5 Mon Sep 17 00:00:00 2001 From: Jakub Sławiński Date: Mon, 15 Dec 2003 21:55:27 +0100 Subject: v0.5.2 - Added: types of realm - Added: logging to a file - Fixed: major bug in communication between server and client - Fixed: deformed packets in udp protocol forwarding 04.12.2003 (v0.5.1): - Fixed: Some data transfer problems - Added: udp protocol tunneling/forwarding - Fixed: bug in parsing the config file - Improved: making connection between server and client - Lightly modified: verbose mode (added double v mode) 23.11.2003 (v0.5): - This is the first release - There are no known major bugs --- COPYING | 340 ++++++++++++++++++++++++++++++ Changelog | 16 ++ Makefile | 50 +++++ README | 89 ++++++++ activefor.h | 41 ++++ afclient.c | 537 +++++++++++++++++++++++++++++++++++++++++++++++ afserver.c | 680 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ config | 39 ++++ file.c | 159 ++++++++++++++ file.h | 65 ++++++ network.c | 257 +++++++++++++++++++++++ network.h | 45 ++++ stats.c | 79 +++++++ stats.h | 28 +++ 14 files changed, 2425 insertions(+) create mode 100644 COPYING create mode 100644 Changelog create mode 100644 Makefile create mode 100644 README create mode 100644 activefor.h create mode 100644 afclient.c create mode 100644 afserver.c create mode 100644 config create mode 100644 file.c create mode 100644 file.h create mode 100644 network.c create mode 100644 network.h create mode 100644 stats.c create mode 100644 stats.h diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..d60c31a --- /dev/null +++ b/COPYING @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Library General Public License instead.) You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +this service if you wish), that you receive source code or can get it +if you want it, that you can change the software or use pieces of it +in new free programs; and that you know you can do these things. + + To protect your rights, we need to make restrictions that forbid +anyone to deny you these rights or to ask you to surrender the rights. +These restrictions translate to certain responsibilities for you if you +distribute copies of the software, or if you modify it. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must give the recipients all the rights that +you have. You must make sure that they, too, receive or can get the +source code. And you must show them these terms so they know their +rights. + + We protect your rights with two steps: (1) copyright the software, and +(2) offer you this license which gives you legal permission to copy, +distribute and/or modify the software. + + Also, for each author's protection and ours, we want to make certain +that everyone understands that there is no warranty for this free +software. If the software is modified by someone else and passed on, we +want its recipients to know that what they have is not the original, so +that any problems introduced by others will not reflect on the original +authors' reputations. + + Finally, any free program is threatened constantly by software +patents. We wish to avoid the danger that redistributors of a free +program will individually obtain patent licenses, in effect making the +program proprietary. To prevent this, we have made it clear that any +patent must be licensed for everyone's free use or not licensed at all. + + The precise terms and conditions for copying, distribution and +modification follow. + + GNU GENERAL PUBLIC LICENSE + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION + + 0. This License applies to any program or other work which contains +a notice placed by the copyright holder saying it may be distributed +under the terms of this General Public License. The "Program", below, +refers to any such program or work, and a "work based on the Program" +means either the Program or any derivative work under copyright law: +that is to say, a work containing the Program or a portion of it, +either verbatim or with modifications and/or translated into another +language. (Hereinafter, translation is included without limitation in +the term "modification".) Each licensee is addressed as "you". + +Activities other than copying, distribution and modification are not +covered by this License; they are outside its scope. The act of +running the Program is not restricted, and the output from the Program +is covered only if its contents constitute a work based on the +Program (independent of having been made by running the Program). +Whether that is true depends on what the Program does. + + 1. You may copy and distribute verbatim copies of the Program's +source code as you receive it, in any medium, provided that you +conspicuously and appropriately publish on each copy an appropriate +copyright notice and disclaimer of warranty; keep intact all the +notices that refer to this License and to the absence of any warranty; +and give any other recipients of the Program a copy of this License +along with the Program. + +You may charge a fee for the physical act of transferring a copy, and +you may at your option offer warranty protection in exchange for a fee. + + 2. You may modify your copy or copies of the Program or any portion +of it, thus forming a work based on the Program, and copy and +distribute such modifications or work under the terms of Section 1 +above, provided that you also meet all of these conditions: + + a) You must cause the modified files to carry prominent notices + stating that you changed the files and the date of any change. + + b) You must cause any work that you distribute or publish, that in + whole or in part contains or is derived from the Program or any + part thereof, to be licensed as a whole at no charge to all third + parties under the terms of this License. + + c) If the modified program normally reads commands interactively + when run, you must cause it, when started running for such + interactive use in the most ordinary way, to print or display an + announcement including an appropriate copyright notice and a + notice that there is no warranty (or else, saying that you provide + a warranty) and that users may redistribute the program under + these conditions, and telling the user how to view a copy of this + License. (Exception: if the Program itself is interactive but + does not normally print such an announcement, your work based on + the Program is not required to print an announcement.) + +These requirements apply to the modified work as a whole. If +identifiable sections of that work are not derived from the Program, +and can be reasonably considered independent and separate works in +themselves, then this License, and its terms, do not apply to those +sections when you distribute them as separate works. But when you +distribute the same sections as part of a whole which is a work based +on the Program, the distribution of the whole must be on the terms of +this License, whose permissions for other licensees extend to the +entire whole, and thus to each and every part regardless of who wrote it. + +Thus, it is not the intent of this section to claim rights or contest +your rights to work written entirely by you; rather, the intent is to +exercise the right to control the distribution of derivative or +collective works based on the Program. + +In addition, mere aggregation of another work not based on the Program +with the Program (or with a work based on the Program) on a volume of +a storage or distribution medium does not bring the other work under +the scope of this License. + + 3. You may copy and distribute the Program (or a work based on it, +under Section 2) in object code or executable form under the terms of +Sections 1 and 2 above provided that you also do one of the following: + + a) Accompany it with the complete corresponding machine-readable + source code, which must be distributed under the terms of Sections + 1 and 2 above on a medium customarily used for software interchange; or, + + b) Accompany it with a written offer, valid for at least three + years, to give any third party, for a charge no more than your + cost of physically performing source distribution, a complete + machine-readable copy of the corresponding source code, to be + distributed under the terms of Sections 1 and 2 above on a medium + customarily used for software interchange; or, + + c) Accompany it with the information you received as to the offer + to distribute corresponding source code. (This alternative is + allowed only for noncommercial distribution and only if you + received the program in object code or executable form with such + an offer, in accord with Subsection b above.) + +The source code for a work means the preferred form of the work for +making modifications to it. For an executable work, complete source +code means all the source code for all modules it contains, plus any +associated interface definition files, plus the scripts used to +control compilation and installation of the executable. However, as a +special exception, the source code distributed need not include +anything that is normally distributed (in either source or binary +form) with the major components (compiler, kernel, and so on) of the +operating system on which the executable runs, unless that component +itself accompanies the executable. + +If distribution of executable or object code is made by offering +access to copy from a designated place, then offering equivalent +access to copy the source code from the same place counts as +distribution of the source code, even though third parties are not +compelled to copy the source along with the object code. + + 4. You may not copy, modify, sublicense, or distribute the Program +except as expressly provided under this License. Any attempt +otherwise to copy, modify, sublicense or distribute the Program is +void, and will automatically terminate your rights under this License. +However, parties who have received copies, or rights, from you under +this License will not have their licenses terminated so long as such +parties remain in full compliance. + + 5. You are not required to accept this License, since you have not +signed it. However, nothing else grants you permission to modify or +distribute the Program or its derivative works. These actions are +prohibited by law if you do not accept this License. Therefore, by +modifying or distributing the Program (or any work based on the +Program), you indicate your acceptance of this License to do so, and +all its terms and conditions for copying, distributing or modifying +the Program or works based on it. + + 6. Each time you redistribute the Program (or any work based on the +Program), the recipient automatically receives a license from the +original licensor to copy, distribute or modify the Program subject to +these terms and conditions. You may not impose any further +restrictions on the recipients' exercise of the rights granted herein. +You are not responsible for enforcing compliance by third parties to +this License. + + 7. If, as a consequence of a court judgment or allegation of patent +infringement or for any other reason (not limited to patent issues), +conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot +distribute so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you +may not distribute the Program at all. For example, if a patent +license would not permit royalty-free redistribution of the Program by +all those who receive copies directly or indirectly through you, then +the only way you could satisfy both it and this License would be to +refrain entirely from distribution of the Program. + +If any portion of this section is held invalid or unenforceable under +any particular circumstance, the balance of the section is intended to +apply and the section as a whole is intended to apply in other +circumstances. + +It is not the purpose of this section to induce you to infringe any +patents or other property right claims or to contest validity of any +such claims; this section has the sole purpose of protecting the +integrity of the free software distribution system, which is +implemented by public license practices. Many people have made +generous contributions to the wide range of software distributed +through that system in reliance on consistent application of that +system; it is up to the author/donor to decide if he or she is willing +to distribute software through any other system and a licensee cannot +impose that choice. + +This section is intended to make thoroughly clear what is believed to +be a consequence of the rest of this License. + + 8. If the distribution and/or use of the Program is restricted in +certain countries either by patents or by copyrighted interfaces, the +original copyright holder who places the Program under this License +may add an explicit geographical distribution limitation excluding +those countries, so that distribution is permitted only in or among +countries not thus excluded. In such case, this License incorporates +the limitation as if written in the body of this License. + + 9. The Free Software Foundation may publish revised and/or new versions +of the General Public License from time to time. Such new versions will +be similar in spirit to the present version, but may differ in detail to +address new problems or concerns. + +Each version is given a distinguishing version number. If the Program +specifies a version number of this License which applies to it and "any +later version", you have the option of following the terms and conditions +either of that version or of any later version published by the Free +Software Foundation. If the Program does not specify a version number of +this License, you may choose any version ever published by the Free Software +Foundation. + + 10. If you wish to incorporate parts of the Program into other free +programs whose distribution conditions are different, write to the author +to ask for permission. For software which is copyrighted by the Free +Software Foundation, write to the Free Software Foundation; we sometimes +make exceptions for this. Our decision will be guided by the two goals +of preserving the free status of all derivatives of our free software and +of promoting the sharing and reuse of software generally. + + NO WARRANTY + + 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY +FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN +OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES +PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED +OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS +TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE +PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, +REPAIR OR CORRECTION. + + 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR +REDISTRIBUTE 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. + + 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 +convey 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 2 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, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision 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, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This 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 Library General +Public License instead of this License. diff --git a/Changelog b/Changelog new file mode 100644 index 0000000..4c3dc15 --- /dev/null +++ b/Changelog @@ -0,0 +1,16 @@ +06.12.2003 (v0.5.2): + - Added: types of realm + - Added: logging to a file + - Fixed: major bug in communication between server and client + - Fixed: deformed packets in udp protocol forwarding + +04.12.2003 (v0.5.1): + - Fixed: Some data transfer problems + - Added: udp protocol tunneling/forwarding + - Fixed: bug in parsing the config file + - Improved: making connection between server and client + - Lightly modified: verbose mode (added double v mode) + +23.11.2003 (v0.5): + - This is the first release + - There are no known major bugs diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..21e5bb4 --- /dev/null +++ b/Makefile @@ -0,0 +1,50 @@ +CC=gcc +CFLAGS=-pedantic -Wall -O2 +programs=afserver afclient +security=server.rsa client.rsa cacert.pem + +all: compi $(programs) ok1 secure + +afserver: afserver.c network.o file.o stats.o + $(CC) $(CFLAGS) -lssl afserver.c network.o file.o stats.o -o afserver + +afclient: afclient.c network.o stats.o + $(CC) $(CFLAGS) -lssl afclient.c network.o stats.o -o afclient + +network.o: network.c network.h + $(CC) $(CFLAGS) -c network.c + +file.o: file.c file.h + $(CC) $(CFLAGS) -c file.c + +stats.o: stats.c stats.h + $(CC) $(CFLAGS) -c stats.c + +secure: crea $(security) ok2 + +server.rsa: + @openssl genrsa -out server.rsa 2048 + +client.rsa: + @openssl genrsa -out client.rsa 2048 + +cacert.pem: + @echo -e "\n Generating certificate...\n" + @echo -e "pl\nWar-Maz\nOlsztyn\nSHEG\nUtils productions\njeremian\njeremian@poczta.fm" | openssl req -new -x509 -key server.rsa -out cacert.pem -days 1095 > /dev/null 2>&1 + +compi: + @echo -e "\nCompiling program...\n" + +crea: + @echo -e "\nCreating necessary files...\n" + +ok1: + @echo " OK!" + +ok2: + @echo " OK!" + +.PHONY: clean + +clean: + rm -rf a.out *~ *.o $(programs) $(security) diff --git a/README b/README new file mode 100644 index 0000000..7abf822 --- /dev/null +++ b/README @@ -0,0 +1,89 @@ +AF - Active Port Forwarder v0.5.2 - README +Copyright (C) 2003 jeremian - jeremian@poczta.fm +=================== + +================================================================================ + +GRAY-WORLD.NET / Active Port Forwarder +========================== + + The Active Port Forwarder program is part of the Gray-World.net projects. + + Our Gray-World Team presents on the http://gray-world.net website the projects + and publications we are working on which are related to the NACS (Network + Access Control System) bypassing research field and to the computer and + network security topics. + +================================================================================ + + +Active port forwarder is a software for secure port forwarding. +It uses ssl for increasing security of communication between server and client. + +Af is dedicated for people, who don't have external ip number and want to +make some services available across the net. + + +EXAMPLE 1: + +The use of it is extremely simple. Let's suppose we want to create http server on +our computer and we are behind masquerade or firewall: + +1) We have to find some machine on the net with external ip and shell account. + +2) Use make to compile everything on that machine. (you can freely remove afclient + and client.rsa files) + +3) You can edit config file or just type from the console: (to use config type -f ) + $ ./afserver + This will work, if you want to use default values: + - hostname will be taken from hostname function (it would be ideally, if there is + appropriate registration in /etc/hosts) + - server will be listening for users on port 50127 + - server will be listening for client on port 50126 + - server will be for maximum 5 users + - server will forward tcp packets + - there will be no logging and no verbose messages + +4) We use make on our machine (we can delete everything apart afclient and client.rsa) + +5) We are typing from the console: + $ ./afclient -n -p 80 + Where is a string like : 'bastion.univ.gda.pl' or '153.19.7.200' + +6) We can now enter with webbrowser to : :50127 and we will enter to our + computer in the fact. + +EXAMPLE 2: + +Let's see how to use af to forward udp packets. Suppose we want to create a game server +on our computer (udp port 27960 on our machine): + +1) - 4) is the same like in example 1. (but we add option: -t udp) + +5) We are typing from the console: + $ ./afclient -u -n -p 27960 + Where is a name (or ip) of a host where our server is running. + +6) Connecting to our game is more complicated. User must use afclient to do this. + He has to specify server he is connecting to and port which his program will be listening on: + $ ./afclient -U -d -p -n -m + Where is name of user machine (who wants to connect to our game). + is a port he will be connecting to. is a name of a host where our server + is running. is a port on which server is listening for users. + In order to connect to our game, user have to connect to :. + + +Active port forwarder is still under development, so please sent me any comments, bugs notices +and suggestions about it to jeremian@poczta.fm + + +And thanks for using this software! + +LICENSE +------- + + Active Port Forwarder is distributed under the terms of the GNU General Public License + v2.0 and is copyright (c) 2003 jeremian . + See the file COPYING for details. + diff --git a/activefor.h b/activefor.h new file mode 100644 index 0000000..777f54f --- /dev/null +++ b/activefor.h @@ -0,0 +1,41 @@ +/* + * active port forwarder - software for secure forwarding + * Copyright (C) 2003 jeremian + * + * 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 2 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#ifndef _JS_ACTIVEFOR_H +#define _JS_ACTIVEFOR_H + +#define AF_S_CONCLOSED 1 +#define AF_S_CONOPEN 2 +#define AF_S_MESSAGE 3 +#define AF_S_LOGIN 8 + +#define S_STATE_CLEAR 0 +#define S_STATE_RUNNING 4 +#define S_STATE_CLOSING 5 +#define S_STATE_OPENING 6 +#define S_STATE_OPEN 7 + +typedef struct { + char state; + int connfd; +} ConnectuserT; + +#endif + diff --git a/afclient.c b/afclient.c new file mode 100644 index 0000000..e4d7c05 --- /dev/null +++ b/afclient.c @@ -0,0 +1,537 @@ +/* + * active port forwarder - software for secure forwarding + * Copyright (C) 2003 jeremian + * + * 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 2 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#include "activefor.h" +#include "network.h" +#include "stats.h" + +#include +#include +#include +#include +#include +#include + +static void usage(char* info); + +int +main(int argc, char **argv) +{ + int masterfd, i, n, numofcon, length, buflength, notsent, temp2; /* !!! */ + ConnectuserT* contable = NULL; + unsigned char buff[8096]; + char hostname[100]; + struct timeval tv; + int maxfdp1, usernum, usercon, merror; + socklen_t len, addrlen; + struct sockaddr* cliaddr; + fd_set rset, allset; + char verbose = 0; + char logging = 0; + char* name = NULL; + char* manage = NULL; + char* desnam = NULL; + char* despor = NULL; + char* keys = NULL; + char* logfname = NULL; + char udp = 0; + char reverse = 0; + + SSL_METHOD* method; + SSL_CTX* ctx; + SSL* ssl; + + signal(SIGPIPE, SIG_IGN); + + while ((n = getopt(argc, argv, "huUn:m:d:p:vk:O:o:")) != -1) { + switch (n) { + case 'h': { + usage("Active port forwarder (client) v0.5.2"); + break; + } + case 'n': { + name = optarg; + break; + } + case 'm': { + manage = optarg; + break; + } + case 'd': { + desnam = optarg; + break; + } + case 'p': { + despor = optarg; + break; + } + case 'v': { + ++verbose; + break; + } + case 'u': { + udp = 1; + break; + } + case 'U': { + reverse = 1; + break; + } + case 'k': { + keys = optarg; + break; + } + case 'O': { + logfname = optarg; + logging = 2; + break; + } + case 'o': { + logfname = optarg; + logging = 1; + break; + } + case '?': { + usage(""); + break; + } + } + } + + if (name == NULL) { + usage("Name of the server is required"); + } + if (manage == NULL) { + manage = "50126"; + if (reverse) + usage("Port on the server is required in reverse mode"); + } + if (desnam == NULL) { + gethostname(hostname, 100); + desnam = hostname; + } + if (despor == NULL) { + usage("Destination port number is required"); + } + if (keys == NULL) { + keys = "client.rsa"; + } + + + masterfd = ip_connect(name, manage, "tcp"); + + if (!reverse) { + SSL_library_init(); + method = SSLv3_client_method(); + ctx = SSL_CTX_new(method); + if (SSL_CTX_set_cipher_list(ctx, "ALL:@STRENGTH") == 0) { + printf("Setting cipher list failed... exiting\n"); + exit(1); + } + if (SSL_CTX_use_RSAPrivateKey_file(ctx, keys, SSL_FILETYPE_PEM) != 1) { + printf("Setting rsa key failed (%s)... exiting\n", keys); + exit(1); + } + ssl = SSL_new(ctx); + if (SSL_set_fd(ssl, masterfd) != 1) { + printf("Problem with initializing ssl... exiting\n"); + exit(1); + } + if (verbose>1) + printf("Trying SSL_connect\n"); + if ((n = SSL_connect(ssl)) == 1) { + if (verbose) { + printf("SSL_connect successfull\n"); + } + } + else { + printf("SSL_connect has failed (%d)... exiting\n", n); + exit(1); + } + + + buff[0] = AF_S_LOGIN; + buff[1] = 1; + buff[2] = 3; + buff[3] = 6; + buff[4] = 2; + SSL_write(ssl, buff, 5); + buff[0] = 0; + SSL_read(ssl, buff, 5); + + if ( buff[0] != AF_S_LOGIN ) { + printf("Incompatible server type or server full\n"); + exit(1); + } + + usernum = buff[1]; + usernum = usernum << 8; + usernum += buff[2]; + + } /* !reverse */ + else { + usernum = 1; + ssl = NULL; + } + + contable = calloc( usernum, sizeof(ConnectuserT)); + if (contable == NULL) { + printf("Calloc error - unable to succesfully comunicate with server\n"); + exit(1); + } + + len = 4; + if (getsockopt(masterfd, SOL_SOCKET, SO_SNDBUF, &buflength, &len) == -1) { + printf("Can't get socket send buffor size - exiting...\n"); + exit(1); + } + + if (loginit(verbose, logging, logfname)) { + printf("Can't open file to log to... exiting\n"); + exit(1); + } + + if (!verbose) + daemon(0, 0); + + FD_ZERO(&allset); + + FD_SET(masterfd, &allset); + maxfdp1 = masterfd + 1; + + if (reverse) { + contable[0].connfd=ip_listen(desnam, despor, &addrlen, "udp"); + cliaddr = malloc(addrlen); + maxfdp1 = (maxfdp1>contable[0].connfd+1) ? maxfdp1 : contable[0].connfd+1; + FD_SET(contable[0].connfd, &allset); + aflog(1, "^^Started in udp reverse mode^^"); + for ( ; ; ) { + len = 4; + if (getsockopt(masterfd, SOL_SOCKET, SO_SNDBUF, &temp2, &len) != -1) { + if (temp2 != buflength) { + buflength = temp2; + aflog(2, "Send buffor size changed..."); + } + } + len = addrlen; + rset = allset; + aflog(2, ">select"); + select(maxfdp1, &rset, NULL, NULL, NULL); + aflog(2, ">>after select..."); + if (FD_ISSET(contable[0].connfd, &rset)) { + n = recvfrom(contable[0].connfd, &buff[5], 8091, 0, cliaddr, &len); +#ifdef SIOCOUTQ + if (ioctl(masterfd, SIOCOUTQ, ¬sent)) { + aflog(0, "ioctl error -> exiting..."); + exit(1); + } + if (buflength <= notsent + n + 5) { /* when we can't do this */ + aflog(2, "drop: size:%d, buf:%d, w:%d/%d", + n, buflength, notsent, buflength); +#else + if (ioctl(masterfd, TIOCOUTQ, ¬sent)) { + aflog(0, "ioctl error -> exiting..."); + exit(1); + } + if (notsent <= n + 5) { /* when we can't do this */ + aflog(2, "drop: size:%d, buf:%d, w:%d/%d", + n, buflength, buflength - notsent, buflength); +#endif + } + else { + if (n > 0) { + aflog(2, "Sending %d bytes to service (w:%d/%d)", + n, +#ifdef SIOCOUTQ + notsent +#else + buflength - notsent +#endif + , buflength); + buff[0] = AF_S_MESSAGE; + buff[1] = AF_S_LOGIN; + buff[2] = AF_S_MESSAGE; + buff[3] = n >> 8; + buff[4] = n; + writen(masterfd, buff, n + 5); + } + } + } + if (FD_ISSET(masterfd, &rset)) { + n = readn(masterfd, buff, 5); + if (n == 5) { + if ((buff[0] != AF_S_MESSAGE) || (buff[1] != AF_S_LOGIN) + || (buff[2] != AF_S_MESSAGE)) { + aflog(0, "Incompatible server type (not udp?) or data corruption -> exiting..."); + exit(1); + } + length = buff[3]; + length = length << 8; + length += buff[4]; /* this is length of message */ + n = readn(masterfd, buff, length); + } + else { + n = 0; + } + if (n == 0) { /* server quits -> we do the same... */ + gettimeofday(&tv, 0); + aflog(0, "premature quit of the server -> exiting..."); + exit(1); + } + aflog(2, "Sending %d bytes to user", n); + sendto(contable[0].connfd, buff, n, 0, cliaddr, addrlen); + } + } + exit(0); /* we shouldn't get here */ + } + + aflog(1, "^^Started in normal mode^^ (%s)", (udp)?"udp":"tcp"); + + for ( ; ; ) { + rset = allset; + aflog(2, ">select"); + select(maxfdp1, &rset, NULL, NULL, NULL); + aflog(2, ">>after select..."); + + for (i = 0; i < usernum; ++i) { + if (contable[i].state == S_STATE_OPEN) + if (FD_ISSET(contable[i].connfd, &rset)) { + aflog(2, "FD_ISSET(contable[%d].connfd)", i); + n = read(contable[i].connfd, &buff[5], 8091); + if (n == -1) { + aflog(0, "FATAL ERROR! (%d) while reading from user", n); + n = 0; + } +#ifdef SIOCOUTQ + if (ioctl(masterfd, SIOCOUTQ, ¬sent)) { + aflog(0, "ioctl error -> exiting..."); + exit(1); + } + if (udp) { + len = 4; + if (getsockopt(masterfd, SOL_SOCKET, SO_SNDBUF, &temp2, &len) != -1) { + if (temp2 != buflength) { + buflength = temp2; + aflog(2, "Send buffor size changed..."); + } + } + if (buflength <= notsent + n + 5) { /* when we can't send this */ + aflog(2, "drop: size:%d, buf:%d, w:%d/%d", + n+5, buflength, notsent, buflength); +#else + if (ioctl(masterfd, TIOCOUTQ, ¬sent)) { + aflog(0, "ioctl error -> exiting..."); + exit(1); + } + if (udp) { + len = 4; + if (getsockopt(masterfd, SOL_SOCKET, SO_SNDBUF, &temp2, &len) != -1) { + if (temp2 != buflength) { + buflength = temp2; + aflog(2, "Send buffor size changed..."); + } + } + if (notsent <= n + 5) { /* when we can't send this */ + aflog(2, "drop: size:%d, buf:%d, w:%d/%d", + n+5, buflength, buflength-notsent, buflength); +#endif + continue; /* drop this packet */ + } + } + if (n) { + buff[0] = AF_S_MESSAGE; /* sending message */ + buff[1] = i >> 8; /* high bits of user number */ + buff[2] = i; /* low bits of user number */ + buff[3] = n >> 8; /* high bits of message length */ + buff[4] = n; /* low bits of message length */ + aflog(2, "Sending %d bytes to user (%d) [%d/%d]", + n, i, +#ifdef SIOCOUTQ + notsent +#else + buflength - notsent +#endif + , buflength); + SSL_writen(ssl, buff, n+5); + } + else if (!udp) { + close(contable[i].connfd); + FD_CLR(contable[i].connfd, &allset); + contable[i].state = S_STATE_CLOSING; + buff[0] = AF_S_CONCLOSED; /* closing connection */ + buff[1] = i >> 8; /* high bits of user number */ + buff[2] = i; /* low bits of user number */ + SSL_writen(ssl, buff, 5); + } + } + } + + if (FD_ISSET(masterfd, &rset)) { + aflog(2, "FD_ISSET(masterfd)"); + n = SSL_readn(ssl, buff, 5); + if (n != 5) { + aflog(2, "FATAL ERROR! (%d)", n); + if (n == -1) { + merror = SSL_get_error(ssl, n); + switch (merror) { + case SSL_ERROR_NONE : { + aflog(2, "FE: none"); + break; + } + case SSL_ERROR_ZERO_RETURN : { + aflog(2, "FE: zero"); + break; + } + case SSL_ERROR_WANT_READ : { + aflog(2, "FE: w_read"); + break; + } + case SSL_ERROR_WANT_WRITE : { + aflog(2, "FE: w_write"); + break; + } + case SSL_ERROR_WANT_CONNECT : { + aflog(2, "FE: w_connect"); + break; + } + case SSL_ERROR_WANT_X509_LOOKUP : { + aflog(2, "FE: w_x509_lookup"); + break; + } + case SSL_ERROR_SYSCALL : { + aflog(2, "FE: syscall"); + break; + } + case SSL_ERROR_SSL : { + SSL_load_error_strings(); + aflog(2, "FE: ssl:%s", + ERR_error_string(ERR_get_error(), (char*) buff)); + break; + } + } + continue; /* what happened? */ + } + if (n != 0) + exit(1); + } + if (n == 0) { /* server quits -> we do the same... */ + aflog(0, "premature quit of the server -> exiting..."); + exit(1); + } + numofcon = buff[1]; + numofcon = numofcon << 8; + numofcon += buff[2]; /* this is id of user */ + length = buff[3]; + length = length << 8; + length += buff[4]; /* this is length of message */ + switch (buff[0]) { + case AF_S_CONCLOSED : { + if ((numofcon>=0) && (numofcon<=usernum)) { + usercon--; + if (contable[numofcon].state == S_STATE_CLOSING) { + contable[numofcon].state = S_STATE_CLEAR; + } + else if (contable[numofcon].state==S_STATE_OPEN) { + close(contable[numofcon].connfd); + FD_CLR(contable[numofcon].connfd, &allset); + contable[numofcon].state = S_STATE_CLEAR; + buff[0] = AF_S_CONCLOSED; /* closing connection */ + buff[1] = numofcon >> 8; /* high bits of user number */ + buff[2] = numofcon; /* low bits of user number */ + SSL_writen(ssl, buff, 5); + } + } + break; + } + case AF_S_CONOPEN : { + if ((numofcon>=0) && (numofcon<=usernum)) { + usercon++; + if (contable[numofcon].state == S_STATE_CLEAR) { + if (udp) { + contable[numofcon].connfd=ip_connect(desnam,despor,"udp"); + } + else { + contable[numofcon].connfd=ip_connect(desnam,despor,"tcp"); + } + FD_SET(contable[numofcon].connfd, &allset); + maxfdp1 = (maxfdp1 > (contable[numofcon].connfd+1)) ? maxfdp1 : (contable[numofcon].connfd+1); + buff[0] = AF_S_CONOPEN; /* closing connection */ + buff[1] = numofcon >> 8; /* high bits of user number */ + buff[2] = numofcon; /* low bits of user number */ + SSL_writen(ssl, buff, 5); + contable[numofcon].state = S_STATE_OPEN; + } + } + break; + } + case AF_S_MESSAGE : { + aflog(2, "Received msg for con[%d], length=%d", numofcon, length); + n = SSL_readn(ssl, buff, length); + if (n != length) { + aflog(2, "n(%d)!=length(%d)", n, length); + break; + } + if ((numofcon>=0) && (numofcon<=usernum)) { + if (contable[numofcon].state == S_STATE_OPEN) { + aflog(2, "sent msg con[%d], length=%d", numofcon, n); + if (writen(contable[numofcon].connfd, buff, n)==-1) { + aflog(0, "Sending msg failed!"); + } + } + } + break; + } + default : { /* unrecognized type of message -> exiting... */ + aflog(0, "Server sents unrecognized message -> exiting..."); + exit(1); + + break; + } + } + } + } +} + +static void +usage(char* info) +{ + printf("\n%s\n\n", info); + printf(" Options:\n"); + printf(" -h - prints this help\n"); + printf(" -n [server name] - where the second part of the active\n"); + printf(" port forwarder is running (required)\n"); + printf(" -m [portnum] - the manage port number - server must\n"); + printf(" listening on it (default: 50126)\n"); + printf(" -d [hostname] - name of this host/remote host - the final\n"); + printf(" destination of the packets (default: name\n"); + printf(" returned by hostname function)\n"); + printf(" -p [portnum] - port we are forwarding connection to (required)\n"); + printf(" -k [keyfile] - name of the file with RSA key (default: client.rsa)\n"); + printf(" -u - udp mode - client will use udp protocol to\n"); + printf(" communicate with hostname\n"); + printf(" -U - reverse udp forwarding. Udp packets will be forwarded\n"); + printf(" from hostname:portnum (-p) to server name:portnum (-m)\n"); + printf(" -O [logfile] - logging everything to a logfile\n"); + printf(" -o [logfile] - logging some data to a logfile\n"); + printf(" -v - to be verbose - program won't enter into\n"); + printf(" the daemon mode (use twice for greater effect)\n\n"); + exit(0); +} + diff --git a/afserver.c b/afserver.c new file mode 100644 index 0000000..947d001 --- /dev/null +++ b/afserver.c @@ -0,0 +1,680 @@ +/* + * active port forwarder - software for secure forwarding + * Copyright (C) 2003 jeremian + * + * 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 2 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#include "activefor.h" +#include "network.h" +#include "file.h" +#include "stats.h" + +#include +#include +#include +#include +#include + +static void usage(char* info); + +int +main(int argc, char **argv) +{ + int i, j, n, flags; + ConfigurationT config; + socklen_t len; + unsigned char buff[8096]; + char hostname[100]; + int maxfdp1; + fd_set rset, allset; + int manconnecting, numofcon, length; + char* name = NULL; + char* listen = NULL; + char* manage = NULL; + char* amount = NULL; + char* filenam = NULL; + char* type = NULL; + char* znak; + char verbose = 0; + RealmT* pointer = NULL; + + SSL_METHOD* method; + SSL_CTX* ctx; + + signal(SIGPIPE, SIG_IGN); + + config.certif = NULL; + config.keys = NULL; + config.size = 0; + config.realmtable = NULL; + config.logging = 0; + config.logfnam = NULL; + + while ((n = getopt(argc, argv, "hn:l:m:vu:c:k:f:t:o:O:")) != -1) { + switch (n) { + case 'h': { + usage("Active port forwarder (server) v0.5.2"); + break; + } + case 'n': { + name = optarg; + break; + } + case 'l': { + listen = optarg; + break; + } + case 'm': { + manage = optarg; + break; + } + case 'v': { + ++verbose; + break; + } + case 'u': { + amount = optarg; + break; + } + case 'c': { + config.certif = optarg; + break; + } + case 'k': { + config.keys = optarg; + break; + } + case 't': { + type = optarg; + break; + } + case 'f': { + filenam = optarg; + break; + } + case 'O': { + config.logfnam = optarg; + config.logging = 2; + break; + } + case 'o': { + config.logfnam = optarg; + config.logging = 1; + break; + } + case '?': { + usage(""); + break; + } + } + } + + if (filenam != NULL) { + config = parsefile(filenam, &n); + if (n) { + printf("parsing failed! line:%d\n", n); + exit(1); + } + else { + if (verbose) { + printf("cfg file OK! (readed realms: %d)\n", config.size); + } + } + } + else { + if (name == NULL) { + gethostname(hostname, 100); + name = hostname; + } + if (listen == NULL) { + listen = "50127"; + } + if (manage == NULL) { + manage = "50126"; + } + if (amount == NULL) { + amount = "5"; + } + if (config.certif == NULL) { + config.certif = "cacert.pem"; + } + if (config.keys == NULL) { + config.keys = "server.rsa"; + } + if (type == NULL) { + type = "tcp"; + } + config.size = 1; + config.realmtable = calloc(config.size, sizeof(RealmT)); + config.realmtable[0].hostname = name; + config.realmtable[0].lisportnum = listen; + config.realmtable[0].manportnum = manage; + config.realmtable[0].users = amount; + if (strcmp(type, "tcp") == 0) { + config.realmtable[0].type = 1; + } + else if (strcmp(type, "udp") == 0) { + config.realmtable[0].type = 2; + } + else { + config.realmtable[0].type = 0; + } + } + + maxfdp1 = manconnecting = 0; + + SSL_library_init(); + method = SSLv3_server_method(); + ctx = SSL_CTX_new(method); + if (SSL_CTX_set_cipher_list(ctx, "ALL:@STRENGTH") == 0) { + printf("Setting ciphers list failed... exiting\n"); + exit(1); + } + if (SSL_CTX_use_RSAPrivateKey_file(ctx, config.keys, SSL_FILETYPE_PEM) != 1) { + printf("Setting rsa key failed (%s)... exiting\n", config.keys); + exit(1); + } + if (SSL_CTX_use_certificate_file(ctx, config.certif, SSL_FILETYPE_PEM) != 1) { + printf("Setting certificate failed (%s)... exiting\n", config.certif); + exit(1); + } + + if (config.size == 0) { + printf("Working without sense is really without sense...\n"); + exit(1); + } + + FD_ZERO(&allset); + + for (i = 0; i < config.size; ++i) { + if ((config.realmtable[i].hostname == NULL) || + (config.realmtable[i].lisportnum == NULL) || + (config.realmtable[i].manportnum == NULL) || + (config.realmtable[i].users == NULL)) { + printf("Missing some of configurable variables... exiting\n"); + printf("%d) %s, %s, %s, %s\n", i, config.realmtable[i].hostname, + config.realmtable[i].lisportnum, + config.realmtable[i].manportnum, + config.realmtable[i].users); + exit(1); + } + if (config.realmtable[i].type == 0) { + printf("Unrecognized type of the realm... exiting\n"); + exit(1); + } + if ((( config.realmtable[i].usernum = strtol(config.realmtable[i].users, &znak, 10)) == LONG_MAX) || (config.realmtable[i].usernum == LONG_MIN)) { + printf("Invalid user amount - %s\n", config.realmtable[i].users); + exit(1); + } + if (((*(config.realmtable[i].users)) == '\0') || (*znak != '\0')) { + printf("Invalid user amount - %s\n", config.realmtable[i].users); + exit(1); + } + + config.realmtable[i].contable = calloc( config.realmtable[i].usernum, sizeof(ConnectuserT)); + if (config.realmtable[i].contable == NULL) { + printf("Calloc error - try define smaller amount of users\n"); + exit(1); + } + + config.realmtable[i].listenfd = ip_listen(config.realmtable[i].hostname, + config.realmtable[i].lisportnum, (&(config.realmtable[i].addrlen)), "tcp"); + config.realmtable[i].managefd = ip_listen(config.realmtable[i].hostname, + config.realmtable[i].manportnum, (&(config.realmtable[i].addrlen)), "tcp"); + config.realmtable[i].cliaddr = malloc(config.realmtable[i].addrlen); + + config.realmtable[i].ssl = SSL_new(ctx); + if (config.realmtable[i].ssl == NULL) { + printf("Creating of ssl object failed... exiting\n"); + exit(1); + } + + FD_SET(config.realmtable[i].managefd, &allset); + maxfdp1 = (maxfdp1 > (config.realmtable[i].managefd+1)) ? maxfdp1 : (config.realmtable[i].managefd+1); + config.realmtable[i].usercon = 0; + config.realmtable[i].ready = 0; + config.realmtable[i].tv.tv_sec = 5; + config.realmtable[i].tv.tv_usec = 0; + } + + if (loginit(verbose, config.logging, config.logfnam)) { + printf("Can't open file to log to... exiting\n"); + exit(1); + } + + if (!verbose) + daemon(0, 0); + + aflog(1, "Server started"); + + for ( ; ; ) { + rset = allset; + aflog(2, ">select, maxfdp1: %d", maxfdp1); + if (manconnecting) { + /* find out, in what realm client is trying to connect */ + for (i = 0; i < config.size; ++i) { + if ((config.realmtable[i].ready == 1) || (config.realmtable[i].ready == 2)) { + break; /* so i points to first good realm */ + } + } + if (select(maxfdp1, &rset, NULL, NULL, (&(config.realmtable[i].tv))) == 0) { + close (config.realmtable[i].commfd); + FD_CLR(config.realmtable[i].commfd, &allset); + FD_CLR(config.realmtable[i].listenfd, &allset); + FD_SET(config.realmtable[i].managefd, &allset); + config.realmtable[i].ready = 0; + manconnecting--; + aflog(1, "SSL_accept failed (timeout) in realm[%d]", i); + } + } + else { + select(maxfdp1, &rset, NULL, NULL, NULL); + } + aflog(2, "<< >>after select..."); + + for (j = 0; j < config.size; ++j) { + pointer = (&(config.realmtable[j])); + for (i = 0; i usernum; ++i) { + if (pointer->contable[i].state == S_STATE_OPEN) + if (FD_ISSET(pointer->contable[i].connfd, &rset)) { + aflog(2, "FD_ISSET(realm[%d].contable[%d].connfd)", j, i); + if (pointer->type == 1) { /* forwarding tcp packets */ + n = read(pointer->contable[i].connfd, &buff[5], 8091); + if (n == -1) + n = 0; + if (n) { + aflog(2, "message from realm[%d].con[%d], length=%d", j, i, n); + if ((buff[5] == AF_S_MESSAGE) && + (buff[6] == AF_S_LOGIN) && + (buff[7] == AF_S_MESSAGE)) { + aflog(2, "WARNING: got packet similiar to udp"); + } + buff[0] = AF_S_MESSAGE; /* sending message */ + buff[1] = i >> 8; /* high bits of user number */ + buff[2] = i; /* low bits of user number */ + buff[3] = n >> 8; /* high bits of message length */ + buff[4] = n; /* low bits of message length */ + SSL_writen(pointer->ssl, buff, n+5); + } + else { + aflog(1, "user closed: realm[%d].con[%d]", j, i); + close(pointer->contable[i].connfd); + FD_CLR(pointer->contable[i].connfd, &allset); + pointer->contable[i].state = S_STATE_CLOSING; + buff[0] = AF_S_CONCLOSED; /* closing connection */ + buff[1] = i >> 8; /* high bits of user number */ + buff[2] = i; /* low bits of user number */ + SSL_writen(pointer->ssl, buff, 5); + } + } + else { /* when forwarding udp packets */ + n = readn(pointer->contable[i].connfd, buff, 5 ); + if (n != 5) { + n = 0; + } + if (n) { + if ((buff[0] == AF_S_MESSAGE) && (buff[1] == AF_S_LOGIN) + && (buff[2] == AF_S_MESSAGE)) { + length = buff[3]; + length = length << 8; + length += buff[4]; /* this is length of message */ + if ((n = readn(pointer->contable[i].connfd, &buff[5], length)) != 0) { + aflog(2, "message from realm[%d].con[%d], length=%d", j, i, n); + buff[1] = i >> 8; /* high bits of user number */ + buff[2] = i; /* low bits of user number */ + SSL_writen(pointer->ssl, buff, n+5); + } + } + else { + n = 0; + } + } + + if (n == 0) { + aflog(1, "user closed: realm[%d].con[%d]", j, i); + close(pointer->contable[i].connfd); + FD_CLR(pointer->contable[i].connfd, &allset); + pointer->contable[i].state = S_STATE_CLOSING; + buff[0] = AF_S_CONCLOSED; /* closing connection */ + buff[1] = i >> 8; /* high bits of user number */ + buff[2] = i; /* low bits of user number */ + SSL_writen(pointer->ssl, buff, 5); + } + + } + } + } + if (pointer->ready == 3) + if (FD_ISSET(pointer->listenfd, &rset)) { + aflog(2, "FD_ISSET(realm[%d].listenfd)", j); + len = pointer->addrlen; + if (pointer->ready == 3) { + for (i = 0; i < pointer->usernum; ++i) { + if (pointer->contable[i].state == S_STATE_CLEAR) { + aflog(2, "realm[%d].contable[%d].connfd = (realm[%d].listenfd)", j, i, j); + pointer->contable[i].connfd = + accept(pointer->listenfd, pointer->cliaddr, &len); + pointer->contable[i].state = S_STATE_OPENING; + pointer->usercon++; + aflog(1, "user IP:%s",sock_ntop(pointer->cliaddr, len)); + if (pointer->usercon == pointer->usernum) + FD_CLR(pointer->listenfd, &allset); + buff[0] = AF_S_CONOPEN; /* opening connection */ + buff[1] = i >> 8; /* high bits of user number */ + buff[2] = i; /* low bits of user number */ + SSL_writen(pointer->ssl, buff, 5); + break; + } + } + } + } + if (pointer->ready != 0) + if (FD_ISSET(pointer->commfd, &rset)) { + if (pointer->ready == 1) { + if (SSL_set_fd(pointer->ssl, pointer->commfd) != 1) { + aflog(0, "Problem with initializing ssl... exiting"); + exit(1); + } + aflog(2, "Trying SSL_accept in realm[%d]", j); + if ((n = SSL_accept(pointer->ssl)) != 1) { + flags = SSL_get_error(pointer->ssl, n); + switch (flags) { + case SSL_ERROR_NONE : { + aflog(2, "SSL_accept has failed(%d)...none", n); + break; + } + case SSL_ERROR_ZERO_RETURN : { + aflog(2, "SSL_accept has failed(%d)...zero", n); + break; + } + case SSL_ERROR_WANT_READ : { + aflog(2, "SSL_accept has failed(%d)...w_read", n); + break; + } + case SSL_ERROR_WANT_WRITE : { + aflog(2, "SSL_accept has failed(%d)...w_write", n); + break; + } + case SSL_ERROR_WANT_CONNECT : { + aflog(2, "SSL_accept has failed(%d)...w_connect", n); + break; + } + case SSL_ERROR_WANT_X509_LOOKUP : { + aflog(2, "SSL_accept has failed(%d)...w_x509_lookup", n); + break; + } + case SSL_ERROR_SYSCALL : { + aflog(2, "SSL_accept has failed(%d)...syscall", n); + break; + } + case SSL_ERROR_SSL : { + SSL_load_error_strings(); + aflog(2, "SSL_accept has failed(%d)...ssl:%s", + n, ERR_error_string(ERR_get_error(), (char*) buff)); + break; + } + } + if (flags == SSL_ERROR_WANT_READ) + continue; + close (pointer->commfd); + FD_CLR(pointer->commfd, &allset); + FD_SET(pointer->managefd, &allset); + SSL_clear(pointer->ssl); + pointer->ready = 0; + manconnecting--; + aflog(1, "SSL_accept failed (denied) in realm[%d]", j); + } + else { + aflog(1, "SSL_accept successfull in realm[%d]", j); + pointer->ready = 2; + } + continue; /* in the case this is not our client */ + } + aflog(2, "FD_ISSET(realm[%d].commfd)", j); + n = SSL_read(pointer->ssl, buff, 5); + if (n == -1) { + if (errno == EAGAIN) { + continue; + } + else { + n = 0; + } + } + else if (n != 5) { + n = 0; + } + if (n==0) { + close(pointer->commfd); + FD_CLR(pointer->commfd, &allset); + FD_CLR(pointer->listenfd, &allset); + FD_SET(pointer->managefd, &allset); + maxfdp1 = (maxfdp1 > (pointer->managefd+1)) ? maxfdp1 : (pointer->managefd+1); + if (pointer->ready == 3) { + for (i = 0; i < pointer->usernum; ++i) { + if (pointer->contable[i].state != S_STATE_CLEAR) { + pointer->contable[i].state = S_STATE_CLEAR; + FD_CLR(pointer->contable[i].connfd, &allset); + close(pointer->contable[i].connfd); + } + } + } + pointer->usercon = 0; + SSL_clear(pointer->ssl); + pointer->ready = 0; + aflog(1, "realm[%d].commfd closed!", j); + continue; + } + numofcon = buff[1]; + numofcon = numofcon << 8; + numofcon += buff[2]; /* this is id of user */ + length = buff[3]; + length = length << 8; + length += buff[4]; /* this is length of message */ + switch (buff[0]) { + case AF_S_CONCLOSED : { + if ((numofcon>=0) && + (numofcon<=(pointer->usernum)) && + ((pointer->ready)==3)) { + (pointer->usercon)--; + if (pointer->usercon == pointer->usernum-1) + FD_SET(pointer->listenfd, &allset); + if (pointer->contable[numofcon].state == + S_STATE_CLOSING) { + pointer->contable[numofcon].state = + S_STATE_CLEAR; + } + else if (pointer->contable[numofcon].state == + S_STATE_OPEN) { + aflog(1, "user kicked: realm[%d].con[%d]", j, numofcon); + close(pointer->contable[numofcon].connfd); + FD_CLR(pointer->contable[numofcon].connfd, &allset); + pointer->contable[numofcon].state = S_STATE_CLEAR; + buff[0] = AF_S_CONCLOSED; /* closing connection */ + buff[1] = numofcon >> 8; /* high bits of user number */ + buff[2] = numofcon; /* low bits of user number */ + SSL_writen(pointer->ssl, buff, 5); + } + } + else { + close (pointer->commfd); + FD_CLR(pointer->commfd, &allset); + FD_CLR(pointer->listenfd, &allset); + FD_SET(pointer->managefd, &allset); + if (pointer->ready == 2) + manconnecting--; + SSL_clear(pointer->ssl); + pointer->ready = 0; + } + break; + } + case AF_S_CONOPEN : { + if ((numofcon>=0) && + (numofcon<=(pointer->usernum)) && + ((pointer->ready)==3)) { + if (pointer->contable[numofcon].state == + S_STATE_OPENING) { + aflog(2, "realm[%d].con[%d]->ok",j,numofcon); + FD_SET(pointer->contable[numofcon].connfd, &allset); + maxfdp1 = (maxfdp1 > (pointer->contable[numofcon].connfd+1)) ? + maxfdp1 : (pointer->contable[numofcon].connfd+1); + pointer->contable[numofcon].state = + S_STATE_OPEN; + } + } + else { + close (pointer->commfd); + FD_CLR(pointer->commfd, &allset); + FD_CLR(pointer->listenfd, &allset); + FD_SET(pointer->managefd, &allset); + if (pointer->ready == 2) + manconnecting--; + SSL_clear(pointer->ssl); + pointer->ready = 0; + } + break; + } + case AF_S_MESSAGE : { + if ((pointer->ready) != 3) { + close (pointer->commfd); + FD_CLR(pointer->commfd, &allset); + FD_CLR(pointer->listenfd, &allset); + FD_SET(pointer->managefd, &allset); + manconnecting--; + SSL_clear(pointer->ssl); + pointer->ready = 0; + break; + } + if (pointer->type==2) { /* udp */ + n = SSL_readn(pointer->ssl, &buff[5], length); + } + else { + n = SSL_readn(pointer->ssl, buff, length); + } + if (n != length) { + aflog(2, "n(%d)!=length(%d)", n, length); + break; + } + if ((numofcon>=0) && + (numofcon<=(pointer->usernum))) { + if (pointer->contable[numofcon].state == + S_STATE_OPEN) { + aflog(2, "message to realm[%d].con[%d], length=%d",j, numofcon, n); + if (pointer->type==2) { /* udp */ + buff[1] = AF_S_LOGIN; + buff[2] = AF_S_MESSAGE; + writen(pointer->contable[numofcon].connfd, buff, n+5); + } + else { + writen(pointer->contable[numofcon].connfd, buff, n); + } + } + } + break; + } + case AF_S_LOGIN : { + if ((pointer->ready == 2)&&(numofcon==259)&&(length==1538)) { + pointer->ready = 3; + buff[0] = AF_S_LOGIN; /* sending message */ + buff[1] = pointer->usernum >> 8;/* high bits of user number */ + buff[2] = pointer->usernum; /* low bits of user number */ + SSL_writen(pointer->ssl, buff, 5); + FD_SET(pointer->listenfd, &allset); + manconnecting--; + } + else { + close (pointer->commfd); + FD_CLR(pointer->commfd, &allset); + FD_CLR(pointer->listenfd, &allset); + FD_SET(pointer->managefd, &allset); + if (pointer->ready == 2) + manconnecting--; + SSL_clear(pointer->ssl); + pointer->ready = 0; + } + break; + } + default : { + aflog(1, "Unrecognized message - closing realm[%d]", j); + close (pointer->commfd); + FD_CLR(pointer->commfd, &allset); + FD_CLR(pointer->listenfd, &allset); + FD_SET(pointer->managefd, &allset); + if (pointer->ready == 2) + manconnecting--; + if (pointer->ready == 3) { + for (i = 0; i < pointer->usernum; ++i) { + if (pointer->contable[i].state != S_STATE_CLEAR) { + pointer->contable[i].state = S_STATE_CLEAR; + FD_CLR(pointer->contable[i].connfd, &allset); + close(pointer->contable[i].connfd); + } + } + } + SSL_clear(pointer->ssl); + pointer->ready = 0; + } + } + } + + if (FD_ISSET(pointer->managefd, &rset)) { + aflog(2, "FD_ISSET(realm[%d].managefd)", j); + len = pointer->addrlen; + if (!(pointer->ready)) { + aflog(2, "accept(realm[%d].managefd)", j); + pointer->commfd = accept(pointer->managefd, pointer->cliaddr, &len); + flags = fcntl(pointer->commfd, F_GETFL, 0); + fcntl(pointer->commfd, F_SETFL, flags | O_NONBLOCK); + aflog(1, " >> Client IP:%s", sock_ntop(pointer->cliaddr, len)); + FD_SET(pointer->commfd, &allset); + maxfdp1 = (maxfdp1 > (pointer->commfd+1)) ? maxfdp1 : (pointer->commfd+1); + FD_CLR(pointer->managefd, &allset); + pointer->tv.tv_sec = 5; + manconnecting++; + pointer->ready = 1; + } + } + } /* realms loop */ + } +} + +static void +usage(char* info) +{ + printf("\n%s\n\n", info); + printf(" Options:\n"); + printf(" -h - prints this help\n"); + printf(" -n [hostname] - it's used when creating listening sockets\n"); + printf(" (default: name returned by hostname function)\n"); + printf(" -l [portnum] - the listening port number - users connect\n"); + printf(" to it (default: 50127)\n"); + printf(" -m [portnum] - the manage port number - second part of active\n"); + printf(" port forwarder connects to it (default: 50126)\n"); + printf(" -u [#users] - amount of users allowed to use this server\n"); + printf(" (default: 5)\n"); + printf(" -c [cerfile] - name of the file with certificate (default: cacert.pem)\n"); + printf(" -k [keyfile] - name of the file with RSA key (default: server.rsa)\n"); + printf(" -f [cfgfile] - name of the file with configuration for active\n"); + printf(" forwarder (server)\n"); + printf(" -t [type] - type of the server (tcp|udp) - for which protocol it\n"); + printf(" would be (default: tcp)\n"); + printf(" -O [logfile] - logging everything to a logfile\n"); + printf(" -o [logfile] - logging some data to a logfile\n"); + printf(" -v - to be verbose - program won't enter into\n"); + printf(" the daemon mode (use twice for greater effect)\n\n"); + exit(0); +} + diff --git a/config b/config new file mode 100644 index 0000000..4a3eb4e --- /dev/null +++ b/config @@ -0,0 +1,39 @@ +# This is an example configuration file for active forwarder +# Firstly, we have to declare our files with key and certificate + +certificate cacert.pem + +# Please note, that we can place only blank characters between words + +key server.rsa + +# when we want to log some information, we specify file for lightlog +# when we want to log everything - we do this by using heavylog option + +# type name of file + +lightlog logfile +#heavylog logfile + + +# And it's time for create forwarding targets (named realms here) + +#newrealm indicates a new set of commands to a server +newrealm + +#options values + +hostname #this is a name of the server (it's using it for choosing interface) +listen 50127 #portnumber on which server is listening for users +manage 50126 #portnumber on which server is listening for afclient +users 5 #amount of users we are allowing to connect +type tcp #type of the realm (which protocol it will forward (tcp|udp) + +# and now the second realm + +newrealm +hostname +listen 50125 +manage 50124 +users 5 +type tcp diff --git a/file.c b/file.c new file mode 100644 index 0000000..b81e595 --- /dev/null +++ b/file.c @@ -0,0 +1,159 @@ +/* + * active port forwarder - software for secure forwarding + * Copyright (C) 2003 jeremian + * + * 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 2 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#include "file.h" +#include +#include +#include +#include + +ConfigurationT +parsefile(char* name, int* status) +{ + static ConfigurationT cfg; + FILE* file = NULL; + int state; + char buff[256]; + char helpbuf1[256]; + char helpbuf2[256]; + + *status = 1; + + memset(buff, 0, 256); + + cfg.certif = NULL; + cfg.keys = NULL; + cfg.size = 0; + cfg.realmtable = NULL; + cfg.logging = 0; + cfg.logfnam = NULL; + + state = F_UNKNOWN; + + file = fopen(name, "r"); + if (file == NULL) { + return cfg; + } + + while (fgets(buff, 256, file) != NULL) { + helpbuf1[0] = 0; + sscanf(buff, "%s", helpbuf1); + if (strcmp(helpbuf1, "newrealm")==0) { + ++cfg.size; + } + } + rewind(file); + + cfg.realmtable = calloc(cfg.size, sizeof(RealmT)); + cfg.size = 0; + *status = 0; + + while (fgets(buff, 256, file) != NULL) { + (*status)++; + state = sscanf(buff, "%s %s", helpbuf1, helpbuf2); + if (helpbuf1[0] == '#') { + memset(buff, 0, 256); + continue; + } + if (state == 1) { + if (strcmp(helpbuf1, "newrealm")==0) { + ++cfg.size; + } + else { + return cfg; + } + } + else if (state == 2) { + if (strcmp(helpbuf1, "certificate")==0) { + cfg.certif = calloc(strlen(helpbuf2)+1, sizeof(char)); + strcpy(cfg.certif, helpbuf2); + } + else if (strcmp(helpbuf1, "key")==0) { + cfg.keys = calloc(strlen(helpbuf2)+1, sizeof(char)); + strcpy(cfg.keys, helpbuf2); + } + else if (strcmp(helpbuf1, "heavylog")==0) { + if (cfg.logging) + return cfg; + cfg.logging = 2; + cfg.logfnam = calloc(strlen(helpbuf2)+1, + sizeof(char)); + strcpy(cfg.logfnam, helpbuf2); + + } + else if (strcmp(helpbuf1, "lightlog")==0) { + if (cfg.logging) { + return cfg; + } + cfg.logging = 1; + cfg.logfnam = calloc(strlen(helpbuf2)+1, + sizeof(char)); + strcpy(cfg.logfnam, helpbuf2); + } + else if (cfg.size == 0) { + return cfg; + } + else if (strcmp(helpbuf1, "hostname")==0) { + cfg.realmtable[cfg.size-1].hostname = calloc(strlen(helpbuf2)+1, + sizeof(char)); + strcpy(cfg.realmtable[cfg.size-1].hostname, helpbuf2); + } + else if (strcmp(helpbuf1, "listen")==0) { + cfg.realmtable[cfg.size-1].lisportnum = calloc(strlen(helpbuf2)+1, + sizeof(char)); + strcpy(cfg.realmtable[cfg.size-1].lisportnum, helpbuf2); + } + else if (strcmp(helpbuf1, "manage")==0) { + cfg.realmtable[cfg.size-1].manportnum = calloc(strlen(helpbuf2)+1, + sizeof(char)); + strcpy(cfg.realmtable[cfg.size-1].manportnum, helpbuf2); + } + else if (strcmp(helpbuf1, "users")==0) { + cfg.realmtable[cfg.size-1].users = calloc(strlen(helpbuf2)+1, + sizeof(char)); + strcpy(cfg.realmtable[cfg.size-1].users, helpbuf2); + } + else if (strcmp(helpbuf1, "type")==0) { + if (cfg.realmtable[cfg.size-1].type != 0) { + return cfg; + } + if (strcmp(helpbuf2, "tcp")==0) { + cfg.realmtable[cfg.size-1].type = 1; + } + else if (strcmp(helpbuf2, "udp")==0) { + cfg.realmtable[cfg.size-1].type = 2; + } + else { + return cfg; + } + } + else { + return cfg; + } + } + memset(buff, 0, 256); + } + + fclose(file); + + *status = 0; + return cfg; +} + diff --git a/file.h b/file.h new file mode 100644 index 0000000..0a27894 --- /dev/null +++ b/file.h @@ -0,0 +1,65 @@ +/* + * active port forwarder - software for secure forwarding + * Copyright (C) 2003 jeremian + * + * 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 2 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#include "activefor.h" +#include "network.h" +#include + +#ifndef _JS_FILE_H +#define _JS_FILE_H + +#define F_UNKNOWN 1 +#define F_IGNORE 2 +#define F_ROPTION 3 +#define F_RVALUE 4 +#define F_MIDDLE 5 + +typedef struct { + char* hostname; + char* lisportnum; + char* manportnum; + char* users; + int usercon; + int usernum; + int listenfd; + int managefd; + int commfd; + char ready; + char type; + socklen_t addrlen; + struct sockaddr* cliaddr; + struct timeval tv; + SSL* ssl; + ConnectuserT* contable; +} RealmT; + +typedef struct { + char* certif; + char* keys; + char* logfnam; + char logging; + int size; + RealmT* realmtable; +} ConfigurationT; + +ConfigurationT parsefile(char*, int*); /* parse the cfg file */ + +#endif + diff --git a/network.c b/network.c new file mode 100644 index 0000000..59e14a9 --- /dev/null +++ b/network.c @@ -0,0 +1,257 @@ +/* + * active port forwarder - software for secure forwarding + * Copyright (C) 2003 jeremian + * + * 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 2 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#include "network.h" +#include +#include +#include + +static void +sig_alrm(int signo) +{ + return; +} + +int +ip_listen(const char *host, const char *serv, socklen_t *addrlenp, const char *type) +{ + int listenfd, n, typ; + const int on = 1; + struct addrinfo hints, *res, *ressave; + + if (strcmp(type, "udp") == 0) + typ = 0; /* this is udp_listen */ + else + typ = 1; /* default: tcp_listen */ + + bzero(&hints, sizeof(struct addrinfo)); + hints.ai_flags = AI_PASSIVE; + hints.ai_family = AF_UNSPEC; + + if (typ) + hints.ai_socktype = SOCK_STREAM; + else + hints.ai_socktype = SOCK_DGRAM; + + if ( (n = getaddrinfo(host, serv, &hints, &res)) != 0) { + printf("%s_listen error for %s, %s: %s\n", + (typ)?"tcp":"udp", host, serv, gai_strerror(n)); + exit(1); + } + ressave = res; + + do { + listenfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol); + if (listenfd < 0) + continue; /* error, try next one */ + + if (typ) /* tcp_listen */ + setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); + if (bind(listenfd, res->ai_addr, res->ai_addrlen) == 0) + break; /* success */ + + close(listenfd); /* bind error, close and try next one */ + } while ( (res = res->ai_next) != NULL); + + if (res == NULL) { /* errno from final socket() or bind() */ + printf("%s_listen error for %s, %s\n", (typ)?"tcp":"udp", host, serv); + exit(1); + } + + if (typ) /* tcp_listen */ + listen(listenfd, 1); + + if (addrlenp) + *addrlenp = res->ai_addrlen; /* return size of protocol address */ + + freeaddrinfo(ressave); + + return(listenfd); +} + +int +ip_connect(const char *host, const char *serv, const char* type) +{ + int sockfd, n, typ; + struct addrinfo hints, *res, *ressave; + + if (strcmp(type, "udp") == 0) + typ = 0; /* this is udp_listen */ + else + typ = 1; /* default: tcp_listen */ + + bzero(&hints, sizeof(struct addrinfo)); + hints.ai_family = AF_UNSPEC; + if (typ) + hints.ai_socktype = SOCK_STREAM; + else + hints.ai_socktype = SOCK_DGRAM; + + if ( (n = getaddrinfo(host, serv, &hints, &res)) != 0) { + printf("%s_connect error for %s, %s: %s\n", + (typ)?"tcp":"udp", host, serv, gai_strerror(n)); + exit(1); + } + ressave = res; + + do { + sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol); + if (sockfd < 0) + continue; /* ignore this one */ + + if (connect(sockfd, res->ai_addr, res->ai_addrlen) == 0) + break; /* success */ + + close(sockfd); /* ignore this one */ + } while ( (res = res->ai_next) != NULL); + + if (res == NULL) { /* errno set from final connect() */ + printf("%s_connect error for %s, %s\n", (typ)?"tcp":"udp", host, serv); + exit(1); + } + + freeaddrinfo(ressave); + + return(sockfd); +} + +char * +sock_ntop(const struct sockaddr *sa, socklen_t salen) +{ + char portstr[7]; + static char str[128]; /* Unix domain is largest */ + + switch (sa->sa_family) { + case AF_INET: { + struct sockaddr_in *sin = (struct sockaddr_in *) sa; + + if (inet_ntop(AF_INET, &sin->sin_addr, str, sizeof(str)) == NULL) + return(NULL); + if (ntohs(sin->sin_port) != 0) { + snprintf(portstr, sizeof(portstr), ".%d", ntohs(sin->sin_port)); + strcat(str, portstr); + } + return(str); + } + +#ifdef IPV6 + case AF_INET6: { + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) sa; + + if (inet_ntop(AF_INET6, &sin6->sin6_addr, str, sizeof(str)) == NULL) + return(NULL); + if (ntohs(sin6->sin6_port) != 0) { + snprintf(portstr, sizeof(portstr), ".%d", ntohs(sin6->sin6_port)); + strcat(str, portstr); + } + return(str); + } +#endif + + default: + snprintf(str, sizeof(str), "sock_ntop: unknown AF_xxx: %d, len %d", + sa->sa_family, salen); + return(str); + } + return (NULL); +} + +int +SSL_writen(SSL* fd, unsigned char* buf, int amount) +{ + int sent, n; + sent = 0; + while (sent < amount) { + signal(SIGALRM, sig_alrm); + alarm(5); + n = SSL_write(fd, buf+sent, amount - sent); + alarm(0); + if (n != -1) { + sent += n; + } + if (n == -1) { + if (errno != EAGAIN) + return 0; + } + } + return amount; +} + +int +SSL_readn(SSL* fd, unsigned char* buf, int amount) +{ + int sent, n; + sent = 0; + while (sent < amount) { + n = SSL_read(fd, buf+sent, amount - sent); + if (n != -1) { + sent += n; + } + if (n == 0) + return 0; + if (n == -1) { + if (errno != EAGAIN) + return 0; + } + } + return amount; +} + +int +writen(int fd, unsigned char* buf, int amount) +{ + int sent, n; + sent = 0; + while (sent < amount) { + signal(SIGALRM, sig_alrm); + alarm(5); + n = write(fd, buf+sent, amount - sent); + alarm(0); + if (n != -1) { + sent += n; + } + if (n == -1) { + if (errno != EAGAIN) + return 0; + } + } + return amount; +} + +int +readn(int fd, unsigned char* buf, int amount) +{ + int sent, n; + sent = 0; + while (sent < amount) { + n = read(fd, buf+sent, amount - sent); + if (n != -1) { + sent += n; + } + if (n == 0) + return 0; + if (n == -1) { + if (errno != EAGAIN) + return 0; + } + } + return amount; + +} diff --git a/network.h b/network.h new file mode 100644 index 0000000..c4d168c --- /dev/null +++ b/network.h @@ -0,0 +1,45 @@ +/* + * active port forwarder - software for secure forwarding + * Copyright (C) 2003 jeremian + * + * 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 2 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#ifndef _JS_NETWORK_H +#define _JS_NETWORK_H + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +int ip_listen(const char *host, const char *serv, socklen_t *addrlenp, const char *type); /* socket, bind, listen... */ +int ip_connect(const char *host, const char *serv, const char *type); /* socket, connect... */ +char* sock_ntop(const struct sockaddr* sa, socklen_t salen); /* return the hostname of connected user */ +int SSL_writen(SSL* fd, unsigned char* buf, int amount); +int SSL_readn(SSL* fd, unsigned char* buf, int amount); +int writen(int fd, unsigned char* buf, int amount); +int readn(int fd, unsigned char* buf, int amount); + +#endif diff --git a/stats.c b/stats.c new file mode 100644 index 0000000..3eca5b9 --- /dev/null +++ b/stats.c @@ -0,0 +1,79 @@ +/* + * active port forwarder - software for secure forwarding + * Copyright (C) 2003 jeremian + * + * 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 2 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#include "stats.h" +#include +#include +#include +#include + +static char verlev; +static char loglev; +static FILE* logfd; + +char* +datum(void) +{ + time_t sec; + struct tm* tm; + static char timedat[20]; + time(&sec); + tm = localtime(&sec); + memset(timedat, 0, 20); + strftime(timedat, 20, "%d.%m.%Y %H:%M:%S", tm); + return timedat; +} + +int +loginit(char verl, char logl, const char* logfname) { + verlev = loglev = 0; + if (logfd) + fclose(logfd); + logfd = NULL; + verlev = verl; + loglev = logl; + if (loglev) { + logfd = fopen(logfname, "a"); + if (logfd == NULL) + return 1; /* logging to a non-opened file? */ + } + return 0; +} + +void +aflog(char type, const char* format, ...) +{ + va_list ap; + va_start(ap, format); + if (verlev) + if (type <= verlev) { + printf("[%s] ", datum()); + vfprintf(stdout, format, ap); + printf("\n"); + } + if (loglev) + if (type <= loglev) { + fprintf(logfd, "[%s] ", datum()); + vfprintf(logfd, format, ap); + fprintf(logfd, "\n"); + fflush(logfd); + } + va_end(ap); +} diff --git a/stats.h b/stats.h new file mode 100644 index 0000000..117899f --- /dev/null +++ b/stats.h @@ -0,0 +1,28 @@ +/* + * active port forwarder - software for secure forwarding + * Copyright (C) 2003 jeremian + * + * 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 2 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#ifndef _JS_STATS_H +#define _JS_STATS_H + +int loginit(char verlev, char loglev, const char* logfname); /* initializes logging routine */ +void aflog(char type, const char* format, ...); /* log to a file or|and screen */ + +#endif + -- cgit v1.1