mirror of https://github.com/wangyu-/udp2raw.git
1324 lines
54 KiB
C++
1324 lines
54 KiB
C++
/*
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* misc.cpp
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*
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* Created on: Sep 23, 2017
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* Author: root
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*/
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#include "git_version.h"
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#include "common.h"
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#include "encrypt.h"
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#include "misc.h"
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#include "network.h"
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#include "connection.h"
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#include "fd_manager.h"
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int hb_mode = 1;
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int hb_len = 1200;
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char hb_buf[buf_len];
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int mtu_warn = 1375; // if a packet larger than mtu warn is receviced,there will be a warning
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int max_rst_to_show = 15;
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int max_rst_allowed = -1;
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int enable_dns_resolve = 0;
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int ttl_value = 64;
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fd_manager_t fd_manager;
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// char remote_address[max_address_len]="";
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// char local_ip[100]="0.0.0.0", remote_ip[100]="255.255.255.255",source_ip[100]="0.0.0.0";//local_ip is for -l option,remote_ip for -r option,source for --source-ip
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// u32_t local_ip_uint32,remote_ip_uint32,source_ip_uint32;//convert from last line.
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// int local_port = -1, remote_port=-1,source_port=0;//similiar to local_ip remote_ip,buf for port.source_port=0 indicates --source-port is not enabled
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address_t local_addr, remote_addr, source_addr;
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my_ip_t bind_addr;
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int source_port = -1;
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int bind_addr_used = 0;
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int force_source_ip = 0; // if --source-ip is enabled
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int force_source_port = 0;
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my_id_t const_id = 0; // an id used for connection recovery,its generated randomly,it never change since its generated
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int udp_fd = -1; // for client only. client use this fd to listen and handle udp connection
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int bind_fd = -1; // bind only,never send or recv. its just a dummy fd for bind,so that other program wont occupy the same port
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#ifdef UDP2RAW_LINUX
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int epollfd = -1; // fd for epoll
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int timer_fd = -1; // the general timer fd for client and server.for server this is not the only timer find,every connection has a timer fd.
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#endif
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int fail_time_counter = 0; // determine if the max_fail_time is reached
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int epoll_trigger_counter = 0; // for debug only
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int debug_flag = 0; // for debug only
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int simple_rule = 0; // deprecated.
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int keep_rule = 0; // whether to monitor the iptables rule periodly,re-add if losted
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int auto_add_iptables_rule = 0; // if -a is set
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int generate_iptables_rule = 0; // if -g is set
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int generate_iptables_rule_add = 0; // if --gen-add is set
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int retry_on_error = 0;
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int debug_resend = 0; // debug only
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char key_string[1000] = "secret key"; // -k option
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char fifo_file[1000] = "";
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int clear_iptables = 0;
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int wait_xtables_lock = 0;
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#ifdef UDP2RAW_LINUX
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string iptables_command0 = "iptables/ip6tables ";
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string iptables_command = "";
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string iptables_pattern = "";
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int iptables_rule_added = 0;
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int iptables_rule_keeped = 0;
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int iptables_rule_keep_index = 0;
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#endif
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program_mode_t program_mode = unset_mode; // 0 unset; 1client 2server
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raw_mode_t raw_mode = mode_faketcp;
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u32_t raw_ip_version = (u32_t)-1;
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unordered_map<int, const char *> raw_mode_tostring = {{mode_faketcp, "faketcp"}, {mode_udp, "udp"}, {mode_icmp, "icmp"}};
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int about_to_exit = 0;
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int socket_buf_size = 1024 * 1024;
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// int force_socket_buf=0;
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// char lower_level_arg[1000];
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#ifdef UDP2RAW_LINUX
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int process_lower_level_arg() // handle --lower-level option
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{
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lower_level = 1;
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if (strcmp(optarg, "auto") == 0) {
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return 0;
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}
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lower_level_manual = 1;
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if (strchr(optarg, '#') == 0) {
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mylog(log_fatal,
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"lower-level parameter invaild,check help page for format\n");
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myexit(-1);
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}
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lower_level = 1;
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u32_t hw[6];
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memset(hw, 0, sizeof(hw));
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sscanf(optarg, "%[^#]#%x:%x:%x:%x:%x:%x", if_name, &hw[0], &hw[1], &hw[2],
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&hw[3], &hw[4], &hw[5]);
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mylog(log_warn,
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"make sure this is correct: if_name=<%s> dest_mac_adress=<%02x:%02x:%02x:%02x:%02x:%02x> \n",
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if_name, hw[0], hw[1], hw[2], hw[3], hw[4], hw[5]);
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for (int i = 0; i < 6; i++) {
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dest_hw_addr[i] = uint8_t(hw[i]);
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}
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return 0;
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}
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#endif
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void print_help() {
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char git_version_buf[100] = {0};
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strncpy(git_version_buf, gitversion, 10);
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printf("udp2raw-tunnel\n");
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printf("git version:%s ", git_version_buf);
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printf("build date:%s %s\n", __DATE__, __TIME__);
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printf("repository: https://github.com/wangyu-/udp2raw-tunnel\n");
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printf("\n");
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#ifdef UDP2RAW_MP
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#ifdef NO_LIBNET
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printf("libnet is disabled at compile time\n");
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printf("\n");
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#endif
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#endif
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printf("usage:\n");
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printf(" run as client : ./this_program -c -l local_listen_ip:local_port -r server_address:server_port [options]\n");
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printf(" run as server : ./this_program -s -l server_listen_ip:server_port -r remote_address:remote_port [options]\n");
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printf("\n");
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printf("common options,these options must be same on both side:\n");
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printf(" --raw-mode <string> available values:faketcp(default),udp,icmp and easy-faketcp\n");
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printf(" -k,--key <string> password to gen symetric key,default:\"secret key\"\n");
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printf(" --cipher-mode <string> available values:aes128cfb,aes128cbc(default),xor,none\n");
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printf(" --auth-mode <string> available values:hmac_sha1,md5(default),crc32,simple,none\n");
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printf(" -a,--auto-rule auto add (and delete) iptables rule\n");
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printf(" -g,--gen-rule generate iptables rule then exit,so that you can copy and\n");
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printf(" add it manually.overrides -a\n");
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printf(" --disable-anti-replay disable anti-replay,not suggested\n");
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printf(" --fix-gro try to fix huge packet caused by GRO. this option is at an early stage.\n");
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printf(" make sure client and server are at same version.\n");
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// printf("\n");
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printf("client options:\n");
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printf(" --source-ip <ip> force source-ip for raw socket\n");
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printf(" --source-port <port> force source-port for raw socket,tcp/udp only\n");
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printf(" this option disables port changing while re-connecting\n");
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// printf(" \n");
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printf("other options:\n");
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printf(" --conf-file <string> read options from a configuration file instead of command line.\n");
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printf(" check example.conf in repo for format\n");
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printf(" --fifo <string> use a fifo(named pipe) for sending commands to the running program,\n");
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printf(" check readme.md in repository for supported commands.\n");
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printf(" --log-level <number> 0:never 1:fatal 2:error 3:warn \n");
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printf(" 4:info (default) 5:debug 6:trace\n");
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// printf("\n");
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printf(" --log-position enable file name,function name,line number in log\n");
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printf(" --disable-color disable log color\n");
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printf(" --disable-bpf disable the kernel space filter,most time its not necessary\n");
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printf(" unless you suspect there is a bug\n");
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// printf("\n");
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#ifdef UDP2RAW_LINUX
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printf(" --dev <string> bind raw socket to a device, not necessary but improves performance\n");
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#endif
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printf(" --sock-buf <number> buf size for socket,>=10 and <=10240,unit:kbyte,default:1024\n");
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printf(" --force-sock-buf bypass system limitation while setting sock-buf\n");
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printf(" --seq-mode <number> seq increase mode for faketcp:\n");
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printf(" 0:static header,do not increase seq and ack_seq\n");
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printf(" 1:increase seq for every packet,simply ack last seq\n");
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printf(" 2:increase seq randomly, about every 3 packets,simply ack last seq\n");
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printf(" 3:simulate an almost real seq/ack procedure(default)\n");
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printf(" 4:similiar to 3,but do not consider TCP Option Window_Scale,\n");
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printf(" maybe useful when firewall doesnt support TCP Option \n");
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// printf("\n");
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printf(" --lower-level <string> send packets at OSI level 2, format:'if_name#dest_mac_adress'\n");
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printf(" ie:'eth0#00:23:45:67:89:b9'.or try '--lower-level auto' to obtain\n");
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printf(" the parameter automatically,specify it manually if 'auto' failed\n");
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printf(" --wait-lock wait for xtables lock while invoking iptables, need iptables v1.4.20+\n");
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printf(" --gen-add generate iptables rule and add it permanently,then exit.overrides -g\n");
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printf(" --keep-rule monitor iptables and auto re-add if necessary.implys -a\n");
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printf(" --hb-len <number> length of heart-beat packet, >=0 and <=1500\n");
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printf(" --mtu-warn <number> mtu warning threshold, unit:byte, default:1375\n");
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printf(" --clear clear any iptables rules added by this program.overrides everything\n");
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printf(" --retry-on-error retry on error, allow to start udp2raw before network is initialized\n");
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printf(" -h,--help print this help message\n");
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// printf("common options,these options must be same on both side\n");
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}
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int load_config(char *file_name, int &argc, vector<string> &argv) // load conf file and append to argv
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{
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// Load configurations from config_file instead of the command line.
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// See config.example for example configurations
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std::ifstream conf_file(file_name);
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std::string line;
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if (conf_file.fail()) {
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mylog(log_fatal, "conf_file %s open failed,reason :%s\n", file_name, get_sock_error());
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myexit(-1);
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}
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while (std::getline(conf_file, line)) {
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auto res = parse_conf_line(line);
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argc += res.size();
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for (int i = 0; i < (int)res.size(); i++) {
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argv.push_back(res[i]);
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}
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}
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conf_file.close();
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return 0;
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}
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int process_log_level(int argc, char *argv[]) // process --log-level and --disable-cloer --log-postion options
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{
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int i, j, k;
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for (i = 0; i < argc; i++) {
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if (strcmp(argv[i], "--log-level") == 0) {
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if (i < argc - 1) {
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sscanf(argv[i + 1], "%d", &log_level);
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if (0 <= log_level && log_level < log_end) {
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} else {
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log_bare(log_fatal, "invalid log_level\n");
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myexit(-1);
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}
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}
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}
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if (strcmp(argv[i], "--enable-color") == 0) {
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enable_log_color = 1;
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}
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if (strcmp(argv[i], "--disable-color") == 0) {
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enable_log_color = 0;
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}
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if (strcmp(argv[i], "--log-position") == 0) {
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enable_log_position = 1;
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}
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}
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return 0;
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}
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void process_arg(int argc, char *argv[]) // process all options
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{
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int i, j, k, opt;
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int option_index = 0;
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char options[] = "l:r:schk:ag";
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static struct option long_options[] =
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{
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/* These options set a flag. */
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{"source-ip", required_argument, 0, 1},
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{"source-port", required_argument, 0, 1},
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{"log-level", required_argument, 0, 1},
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{"key", required_argument, 0, 'k'},
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{"auth-mode", required_argument, 0, 1},
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{"cipher-mode", required_argument, 0, 1},
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{"raw-mode", required_argument, 0, 1},
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{"disable-color", no_argument, 0, 1},
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{"enable-color", no_argument, 0, 1},
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{"log-position", no_argument, 0, 1},
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{"disable-bpf", no_argument, 0, 1},
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{"disable-anti-replay", no_argument, 0, 1},
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{"auto-rule", no_argument, 0, 'a'},
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{"gen-rule", no_argument, 0, 'g'},
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{"gen-add", no_argument, 0, 1},
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{"debug", no_argument, 0, 1},
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{"retry-on-error", no_argument, 0, 1},
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{"clear", no_argument, 0, 1},
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{"simple-rule", no_argument, 0, 1},
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{"keep-rule", no_argument, 0, 1},
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{"lower-level", required_argument, 0, 1},
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{"sock-buf", required_argument, 0, 1},
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{"seq-mode", required_argument, 0, 1},
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{"conf-file", required_argument, 0, 1},
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{"force-sock-buf", no_argument, 0, 1},
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{"wait-lock", no_argument, 0, 1},
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{"random-drop", required_argument, 0, 1},
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{"fifo", required_argument, 0, 1},
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{"hb-mode", required_argument, 0, 1},
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{"hb-len", required_argument, 0, 1},
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{"mtu-warn", required_argument, 0, 1},
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{"max-rst-to-show", required_argument, 0, 1},
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{"max-rst-allowed", required_argument, 0, 1},
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{"set-ttl", required_argument, 0, 1},
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{"dev", required_argument, 0, 1},
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{"dns-resolve", no_argument, 0, 1},
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{"easy-tcp", no_argument, 0, 1},
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#ifdef UDP2RAW_MP
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{"pcap-send", no_argument, 0, 1},
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{"no-pcap-mutex", no_argument, 0, 1},
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#endif
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{"fix-gro", no_argument, 0, 1},
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{NULL, 0, 0, 0}};
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process_log_level(argc, argv);
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set<string> all_options;
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map<string, string> shortcut_map;
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all_options.insert("--help");
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all_options.insert("-h");
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string dummy = "";
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for (i = 0; i < (int)strlen(options); i++) {
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char val = options[i];
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if ((val >= '0' && val <= '9') || (val >= 'a' && val <= 'z') || (val >= 'A' && val <= 'Z')) {
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all_options.insert(dummy + '-' + val);
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}
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}
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for (i = 0; i < int(sizeof(long_options) / sizeof(long_options[0])); i++) {
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if (long_options[i].name == NULL) break;
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int val = long_options[i].val;
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if ((val >= '0' && val <= '9') || (val >= 'a' && val <= 'z') || (val >= 'A' && val <= 'Z')) {
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shortcut_map[dummy + "--" + long_options[i].name] = dummy + "-" + char(val);
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}
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all_options.insert(dummy + "--" + long_options[i].name);
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}
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for (i = 0; i < argc; i++) {
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int len = strlen(argv[i]);
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if (len == 0) {
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mylog(log_fatal, "found an empty string in options\n");
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myexit(-1);
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}
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if (len == 1 && argv[i][0] == '-') {
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mylog(log_fatal, "invaild option '-' in argv\n");
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myexit(-1);
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}
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if (len == 2 && argv[i][0] == '-' && argv[i][1] == '-') {
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mylog(log_fatal, "invaild option '--' in argv\n");
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myexit(-1);
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}
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}
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mylog(log_info, "argc=%d ", argc);
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for (i = 0; i < argc; i++) {
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log_bare(log_info, "%s ", argv[i]);
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}
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log_bare(log_info, "\n");
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// string dummy="";
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for (i = +1; i < argc; i++) {
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if (argv[i][0] != '-') continue;
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string a = argv[i];
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if (a[0] == '-' && a[1] != '-')
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a = dummy + a[0] + a[1];
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if (all_options.find(a.c_str()) == all_options.end()) {
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mylog(log_fatal, "invaild option %s\n", a.c_str());
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myexit(-1);
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}
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for (j = i + 1; j < argc; j++) {
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if (argv[j][0] != '-') continue;
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string b = argv[j];
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if (b[0] == '-' && b[1] != '-')
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b = dummy + b[0] + b[1];
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if (shortcut_map.find(a) != shortcut_map.end())
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a = shortcut_map[a];
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if (shortcut_map.find(b) != shortcut_map.end())
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b = shortcut_map[b];
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if (a == b) {
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mylog(log_fatal, "%s duplicates with %s\n", argv[i], argv[j]);
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myexit(-1);
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}
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}
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}
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int no_l = 1, no_r = 1;
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while ((opt = getopt_long(argc, argv, options, long_options, &option_index)) != -1) {
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// string opt_key;
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// opt_key+=opt;
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switch (opt) {
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case 'l':
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no_l = 0;
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local_addr.from_str(optarg);
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if (local_addr.get_port() == 22) {
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mylog(log_fatal, "port 22 not allowed\n");
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myexit(-1);
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}
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/*
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if (strchr(optarg, ':') != 0) {
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sscanf(optarg, "%[^:]:%d", local_ip, &local_port);
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if(local_port==22)
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{
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mylog(log_fatal,"port 22 not allowed\n");
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myexit(-1);
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}
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} else {
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mylog(log_fatal,"invalid parameter for -l ,%s,should be ip:port\n",optarg);
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myexit(-1);
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}*/
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break;
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case 'r':
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no_r = 0;
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remote_addr.from_str(optarg);
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if (remote_addr.get_port() == 22) {
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mylog(log_fatal, "port 22 not allowed\n");
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myexit(-1);
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}
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/*
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if (strchr(optarg, ':') != 0) {
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sscanf(optarg, "%[^:]:%d", remote_address, &remote_port);
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if(remote_port==22)
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{
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mylog(log_fatal,"port 22 not allowed\n");
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myexit(-1);
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}
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} else {
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mylog(log_fatal,"invalid parameter for -r ,%s,should be ip:port\n",optarg);
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myexit(-1);
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}*/
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break;
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case 's':
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if (program_mode == 0) {
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program_mode = server_mode;
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} else {
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mylog(log_fatal, "-s /-c has already been set,conflict\n");
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myexit(-1);
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}
|
|
break;
|
|
case 'c':
|
|
if (program_mode == 0) {
|
|
program_mode = client_mode;
|
|
} else {
|
|
mylog(log_fatal, "-s /-c has already been set,conflict\n");
|
|
myexit(-1);
|
|
}
|
|
break;
|
|
case 'h':
|
|
break;
|
|
case 'a':
|
|
if (is_udp2raw_mp) {
|
|
mylog(log_fatal, "-a not supported in this version, check -g or --raw-mode easyfaketcp\n");
|
|
myexit(-1);
|
|
}
|
|
auto_add_iptables_rule = 1;
|
|
break;
|
|
case 'g':
|
|
generate_iptables_rule = 1;
|
|
break;
|
|
case 'k':
|
|
mylog(log_debug, "parsing key option\n");
|
|
sscanf(optarg, "%s", key_string);
|
|
break;
|
|
case 1:
|
|
mylog(log_debug, "option_index: %d\n", option_index);
|
|
if (strcmp(long_options[option_index].name, "clear") == 0) {
|
|
if (is_udp2raw_mp) {
|
|
mylog(log_fatal, "--clear not supported in this version\n");
|
|
myexit(-1);
|
|
}
|
|
|
|
clear_iptables = 1;
|
|
} else if (strcmp(long_options[option_index].name, "source-ip") == 0) {
|
|
mylog(log_debug, "parsing long option :source-ip\n");
|
|
// sscanf(optarg, "%s", source_ip);
|
|
source_addr.from_str_ip_only(optarg);
|
|
mylog(log_debug, "source: %s\n", source_addr.get_ip());
|
|
force_source_ip = 1;
|
|
} else if (strcmp(long_options[option_index].name, "source-port") == 0) {
|
|
mylog(log_debug, "parsing long option :source-port\n");
|
|
sscanf(optarg, "%d", &source_port);
|
|
mylog(log_info, "source: %d\n", source_port);
|
|
force_source_port = 1;
|
|
} else if (strcmp(long_options[option_index].name, "raw-mode") == 0) {
|
|
/*
|
|
for(i=0;i<mode_end;i++)
|
|
{
|
|
if(strcmp(optarg,raw_mode_tostring[i])==0)
|
|
{
|
|
//printf("%d i\n",i);
|
|
//printf("%s",raw_mode_tostring[i]);
|
|
raw_mode=(raw_mode_t)i;
|
|
break;
|
|
}
|
|
}
|
|
if(i==mode_end)
|
|
{
|
|
mylog(log_fatal,"no such raw_mode %s\n",optarg);
|
|
myexit(-1);
|
|
}
|
|
*/
|
|
if (strcmp(optarg, "easyfaketcp") == 0 || strcmp(optarg, "easy_faketcp") == 0 || strcmp(optarg, "easy-faketcp") == 0) {
|
|
raw_mode = mode_faketcp;
|
|
use_tcp_dummy_socket = 1;
|
|
} else {
|
|
for (i = 0; i < mode_end; i++) {
|
|
if (strcmp(optarg, raw_mode_tostring[i]) == 0) {
|
|
// printf("%d i\n",i);
|
|
// printf("%s",raw_mode_tostring[i]);
|
|
raw_mode = (raw_mode_t)i;
|
|
break;
|
|
}
|
|
}
|
|
if (i == mode_end) {
|
|
mylog(log_fatal, "no such raw_mode %s\n", optarg);
|
|
myexit(-1);
|
|
}
|
|
}
|
|
} else if (strcmp(long_options[option_index].name, "auth-mode") == 0) {
|
|
for (i = 0; i < auth_end; i++) {
|
|
if (strcmp(optarg, auth_mode_tostring[i]) == 0) {
|
|
auth_mode = (auth_mode_t)i;
|
|
if (auth_mode == auth_none) {
|
|
disable_anti_replay = 1;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (i == auth_end) {
|
|
mylog(log_fatal, "no such auth_mode %s\n", optarg);
|
|
myexit(-1);
|
|
}
|
|
} else if (strcmp(long_options[option_index].name, "cipher-mode") == 0) {
|
|
string s = optarg;
|
|
if (s == "aes128cfb_0") {
|
|
s = "aes128cfb";
|
|
aes128cfb_old = 1;
|
|
mylog(log_warn, "aes128cfb_0 is used\n");
|
|
}
|
|
for (i = 0; i < cipher_end; i++) {
|
|
if (strcmp(s.c_str(), cipher_mode_tostring[i]) == 0) {
|
|
cipher_mode = (cipher_mode_t)i;
|
|
break;
|
|
}
|
|
}
|
|
if (i == cipher_end) {
|
|
mylog(log_fatal, "no such cipher_mode %s\n", optarg);
|
|
myexit(-1);
|
|
}
|
|
} else if (strcmp(long_options[option_index].name, "log-level") == 0) {
|
|
} else if (strcmp(long_options[option_index].name, "lower-level") == 0) {
|
|
if (is_udp2raw_mp) {
|
|
mylog(log_fatal, "--lower-level not supported in this version\n");
|
|
myexit(-1);
|
|
}
|
|
|
|
#ifdef UDP2RAW_LINUX
|
|
process_lower_level_arg();
|
|
#endif
|
|
// process_lower_level_arg();
|
|
// lower_level=1;
|
|
// strcpy(lower_level_arg,optarg);
|
|
} else if (strcmp(long_options[option_index].name, "simple-rule") == 0) {
|
|
if (is_udp2raw_mp) {
|
|
mylog(log_fatal, "--simple-rule not supported in this version\n");
|
|
myexit(-1);
|
|
}
|
|
simple_rule = 1;
|
|
} else if (strcmp(long_options[option_index].name, "keep-rule") == 0) {
|
|
if (is_udp2raw_mp) {
|
|
mylog(log_fatal, "--keep-rule not supported in this version\n");
|
|
myexit(-1);
|
|
}
|
|
keep_rule = 1;
|
|
} else if (strcmp(long_options[option_index].name, "gen-add") == 0) {
|
|
if (is_udp2raw_mp) {
|
|
mylog(log_fatal, "--gen-add not supported in this version\n");
|
|
myexit(-1);
|
|
}
|
|
generate_iptables_rule_add = 1;
|
|
} else if (strcmp(long_options[option_index].name, "disable-color") == 0) {
|
|
// enable_log_color=0;
|
|
} else if (strcmp(long_options[option_index].name, "enable-color") == 0) {
|
|
// enable_log_color=0;
|
|
} else if (strcmp(long_options[option_index].name, "debug") == 0) {
|
|
debug_flag = 1;
|
|
// enable_log_color=0;
|
|
} else if (strcmp(long_options[option_index].name, "dev") == 0) {
|
|
sscanf(optarg, "%s", dev);
|
|
// enable_log_color=0;
|
|
mylog(log_info, "dev=[%s]\n", dev);
|
|
} else if (strcmp(long_options[option_index].name, "debug-resend") == 0) {
|
|
// debug_resend=1;
|
|
// enable_log_color=0;
|
|
} else if (strcmp(long_options[option_index].name, "log-position") == 0) {
|
|
// enable_log_position=1;
|
|
} else if (strcmp(long_options[option_index].name, "force-sock-buf") == 0) {
|
|
if (is_udp2raw_mp) {
|
|
mylog(log_fatal, "--force-sock-buf not supported in this version\n");
|
|
myexit(-1);
|
|
}
|
|
force_socket_buf = 1;
|
|
} else if (strcmp(long_options[option_index].name, "retry-on-error") == 0) {
|
|
retry_on_error = 1;
|
|
} else if (strcmp(long_options[option_index].name, "wait-lock") == 0) {
|
|
wait_xtables_lock = 1;
|
|
} else if (strcmp(long_options[option_index].name, "disable-bpf") == 0) {
|
|
disable_bpf_filter = 1;
|
|
} else if (strcmp(long_options[option_index].name, "disable-anti-replay") == 0) {
|
|
disable_anti_replay = 1;
|
|
} else if (strcmp(long_options[option_index].name, "sock-buf") == 0) {
|
|
int tmp = -1;
|
|
sscanf(optarg, "%d", &tmp);
|
|
if (10 <= tmp && tmp <= 10 * 1024) {
|
|
socket_buf_size = tmp * 1024;
|
|
} else {
|
|
mylog(log_fatal, "sock-buf value must be between 1 and 10240 (kbyte) \n");
|
|
myexit(-1);
|
|
}
|
|
} else if (strcmp(long_options[option_index].name, "seq-mode") == 0) {
|
|
sscanf(optarg, "%d", &seq_mode);
|
|
if (0 <= seq_mode && seq_mode <= max_seq_mode) {
|
|
} else {
|
|
mylog(log_fatal, "seq_mode value must be 0,1,or 2 \n");
|
|
myexit(-1);
|
|
}
|
|
} else if (strcmp(long_options[option_index].name, "random-drop") == 0) {
|
|
sscanf(optarg, "%d", &random_drop);
|
|
if (random_drop < 0 || random_drop > 10000) {
|
|
mylog(log_fatal, "random_drop must be between 0 10000 \n");
|
|
myexit(-1);
|
|
}
|
|
mylog(log_info, "random_drop =%d \n", random_drop);
|
|
} else if (strcmp(long_options[option_index].name, "fifo") == 0) {
|
|
if (is_udp2raw_mp) {
|
|
mylog(log_fatal, "--fifo not supported in this version\n");
|
|
myexit(-1);
|
|
}
|
|
sscanf(optarg, "%s", fifo_file);
|
|
|
|
mylog(log_info, "fifo_file =%s \n", fifo_file);
|
|
} else if (strcmp(long_options[option_index].name, "conf-file") == 0) {
|
|
mylog(log_info, "configuration loaded from %s\n", optarg);
|
|
} else if (strcmp(long_options[option_index].name, "hb-mode") == 0) {
|
|
sscanf(optarg, "%d", &hb_mode);
|
|
assert(hb_mode == 0 || hb_mode == 1);
|
|
mylog(log_info, "hb_mode =%d \n", hb_mode);
|
|
} else if (strcmp(long_options[option_index].name, "hb-len") == 0) {
|
|
sscanf(optarg, "%d", &hb_len);
|
|
assert(hb_len >= 0 && hb_len <= 1500);
|
|
mylog(log_info, "hb_len =%d \n", hb_len);
|
|
} else if (strcmp(long_options[option_index].name, "mtu-warn") == 0) {
|
|
sscanf(optarg, "%d", &mtu_warn);
|
|
assert(mtu_warn > 0);
|
|
mylog(log_info, "mtu_warn=%d \n", mtu_warn);
|
|
} else if (strcmp(long_options[option_index].name, "max-rst-to-show") == 0) {
|
|
sscanf(optarg, "%d", &max_rst_to_show);
|
|
assert(max_rst_to_show >= -1);
|
|
mylog(log_info, "max_rst_to_show=%d \n", max_rst_to_show);
|
|
} else if (strcmp(long_options[option_index].name, "max-rst-allowed") == 0) {
|
|
sscanf(optarg, "%d", &max_rst_allowed);
|
|
assert(max_rst_allowed >= -1);
|
|
mylog(log_info, "max_rst_allowed=%d \n", max_rst_allowed);
|
|
} else if (strcmp(long_options[option_index].name, "set-ttl") == 0) {
|
|
sscanf(optarg, "%d", &ttl_value);
|
|
assert(ttl_value >= 0 && ttl_value <= 255);
|
|
mylog(log_info, "ttl_value=%d\n", ttl_value);
|
|
}
|
|
|
|
else if (strcmp(long_options[option_index].name, "dns-resolve") == 0) // currently not used
|
|
{
|
|
enable_dns_resolve = 1;
|
|
mylog(log_info, "dns-resolve enabled\n");
|
|
}
|
|
#ifdef UDP2RAW_MP
|
|
else if (strcmp(long_options[option_index].name, "pcap-send") == 0) {
|
|
send_with_pcap = 1;
|
|
mylog(log_info, "--pcap-send enabled, now pcap will be used for sending packet instead of libnet\n");
|
|
} else if (strcmp(long_options[option_index].name, "no-pcap-mutex") == 0) {
|
|
use_pcap_mutex = 0;
|
|
mylog(log_warn, "--no-pcap-mutex enabled, we will assume the underlying pcap calls are threadsafe\n");
|
|
}
|
|
#endif
|
|
else if (strcmp(long_options[option_index].name, "easy-tcp") == 0) {
|
|
use_tcp_dummy_socket = 1;
|
|
mylog(log_info, "--easy-tcp enabled, now a dummy tcp socket will be created for handshake and block rst\n");
|
|
} else if (strcmp(long_options[option_index].name, "fix-gro") == 0) {
|
|
mylog(log_info, "--fix-gro enabled\n");
|
|
g_fix_gro = 1;
|
|
} else {
|
|
mylog(log_warn, "ignored unknown long option ,option_index:%d code:<%x>\n", option_index, optopt);
|
|
}
|
|
break;
|
|
default:
|
|
mylog(log_fatal, "unknown option ,code:<%c>,<%x>\n", optopt, optopt);
|
|
myexit(-1);
|
|
}
|
|
}
|
|
|
|
if (no_l)
|
|
mylog(log_fatal, "error: -l not found\n");
|
|
if (no_r)
|
|
mylog(log_fatal, "error: -r not found\n");
|
|
if (program_mode == 0)
|
|
mylog(log_fatal, "error: -c /-s hasnt been set\n");
|
|
if (no_l || no_r || program_mode == 0) {
|
|
print_help();
|
|
myexit(-1);
|
|
}
|
|
if (program_mode == client_mode) {
|
|
raw_ip_version = remote_addr.get_type();
|
|
} else {
|
|
raw_ip_version = local_addr.get_type();
|
|
}
|
|
|
|
if (auto_add_iptables_rule && use_tcp_dummy_socket) {
|
|
mylog(log_error, "-a,--auto-rule is not supposed to be used with easyfaketcp mode, you are likely making a mistake, but we can try to continue\n");
|
|
}
|
|
|
|
if (keep_rule && use_tcp_dummy_socket) {
|
|
mylog(log_error, "--keep-rule is not supposed to be used with easyfaketcp mode, you are likely making a mistake, but we can try to continue\n");
|
|
}
|
|
|
|
mylog(log_info, "important variables: ");
|
|
|
|
log_bare(log_info, "log_level=%d:%s ", log_level, log_text[log_level]);
|
|
log_bare(log_info, "raw_mode=%s ", raw_mode_tostring[raw_mode]);
|
|
log_bare(log_info, "cipher_mode=%s ", cipher_mode_tostring[cipher_mode]);
|
|
log_bare(log_info, "auth_mode=%s ", auth_mode_tostring[auth_mode]);
|
|
|
|
log_bare(log_info, "key=%s ", key_string);
|
|
|
|
log_bare(log_info, "local_addr=%s ", local_addr.get_str());
|
|
log_bare(log_info, "remote_addr=%s ", remote_addr.get_str());
|
|
|
|
if (force_source_ip)
|
|
log_bare(log_info, "source_addr=%s ", source_addr.get_ip());
|
|
|
|
if (force_source_port)
|
|
log_bare(log_info, "source_port=%d ", source_port);
|
|
|
|
log_bare(log_info, "socket_buf_size=%d ", socket_buf_size);
|
|
|
|
log_bare(log_info, "\n");
|
|
}
|
|
|
|
void pre_process_arg(int argc, char *argv[]) // mainly for load conf file
|
|
{
|
|
int i, j, k;
|
|
for (i = 0; i < argc; i++) {
|
|
if (strcmp(argv[i], "--unit-test") == 0) {
|
|
unit_test();
|
|
myexit(0);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < argc; i++) {
|
|
if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
|
|
print_help();
|
|
myexit(0);
|
|
}
|
|
}
|
|
|
|
if (argc == 1) {
|
|
print_help();
|
|
myexit(-1);
|
|
}
|
|
|
|
process_log_level(argc, argv);
|
|
|
|
int new_argc = 0;
|
|
vector<string> new_argv;
|
|
|
|
int count = 0;
|
|
int pos = -1;
|
|
|
|
for (i = 0; i < argc; i++) {
|
|
if (strcmp(argv[i], "--conf-file") == 0) {
|
|
count++;
|
|
pos = i;
|
|
if (i == argc) {
|
|
mylog(log_fatal, "--conf-file need a parameter\n");
|
|
myexit(-1);
|
|
}
|
|
if (argv[i + 1][0] == '-') {
|
|
mylog(log_fatal, "--conf-file need a parameter\n");
|
|
myexit(-1);
|
|
}
|
|
i++;
|
|
} else {
|
|
// printf("<%s>",argv[i]);
|
|
new_argc++;
|
|
new_argv.push_back(argv[i]);
|
|
}
|
|
}
|
|
if (count > 1) {
|
|
mylog(log_fatal, "duplicated --conf-file option\n");
|
|
myexit(-1);
|
|
}
|
|
|
|
if (count > 0) {
|
|
load_config(argv[pos + 1], new_argc, new_argv);
|
|
}
|
|
char *new_argv_char[new_argv.size()];
|
|
|
|
new_argc = 0;
|
|
for (i = 0; i < (int)new_argv.size(); i++) {
|
|
if (strcmp(new_argv[i].c_str(), "--conf-file") == 0) {
|
|
mylog(log_fatal, "cant have --conf-file in a config file\n");
|
|
myexit(-1);
|
|
}
|
|
new_argv_char[new_argc++] = (char *)new_argv[i].c_str();
|
|
}
|
|
process_arg(new_argc, new_argv_char);
|
|
}
|
|
#ifdef UDP2RAW_LINUX
|
|
void *run_keep(void *none) // called in a new thread for --keep-rule option
|
|
{
|
|
while (1) {
|
|
sleep(iptables_rule_keep_interval);
|
|
keep_iptables_rule();
|
|
if (about_to_exit) // just incase it runs forever if there is some bug,not necessary
|
|
{
|
|
sleep(10);
|
|
keep_thread_running = 0; // not thread safe ,but wont cause problem
|
|
break;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
void iptables_rule() // handles -a -g --gen-add --keep-rule --clear --wait-lock
|
|
{
|
|
assert(raw_ip_version == AF_INET || raw_ip_version == AF_INET6);
|
|
|
|
if (raw_ip_version == AF_INET) {
|
|
iptables_command0 = "iptables ";
|
|
} else
|
|
iptables_command0 = "ip6tables ";
|
|
if (!wait_xtables_lock) {
|
|
iptables_command = iptables_command0;
|
|
} else {
|
|
iptables_command = iptables_command0 + "-w ";
|
|
}
|
|
|
|
if (clear_iptables) {
|
|
char *output;
|
|
// int ret =system("iptables-save |grep udp2raw_dWRwMnJhdw|sed -n 's/^-A/iptables -D/p'|sh");
|
|
int ret = run_command(iptables_command + "-S|sed -n '/udp2rawDwrW/p'|sed -n 's/^-A/" + iptables_command + "-D/p'|sh", output);
|
|
|
|
int ret2 = run_command(iptables_command + "-S|sed -n '/udp2rawDwrW/p'|sed -n 's/^-N/" + iptables_command + "-X/p'|sh", output);
|
|
// system("iptables-save |grep udp2raw_dWRwMnJhdw|sed 's/^-A/iptables -D/'|sh");
|
|
// system("iptables-save|grep -v udp2raw_dWRwMnJhdw|iptables-restore");
|
|
mylog(log_info, "tried to clear all iptables rule created previously,return value %d %d\n", ret, ret2);
|
|
myexit(-1);
|
|
}
|
|
|
|
if (auto_add_iptables_rule && generate_iptables_rule) {
|
|
mylog(log_warn, " -g overrides -a\n");
|
|
auto_add_iptables_rule = 0;
|
|
// myexit(-1);
|
|
}
|
|
if (generate_iptables_rule_add && generate_iptables_rule) {
|
|
mylog(log_warn, " --gen-add overrides -g\n");
|
|
generate_iptables_rule = 0;
|
|
// myexit(-1);
|
|
}
|
|
|
|
if (keep_rule && auto_add_iptables_rule == 0) {
|
|
auto_add_iptables_rule = 1;
|
|
mylog(log_warn, " --keep_rule implys -a\n");
|
|
generate_iptables_rule = 0;
|
|
// myexit(-1);
|
|
}
|
|
char tmp_pattern[200];
|
|
string pattern = "";
|
|
|
|
if (program_mode == client_mode) {
|
|
tmp_pattern[0] = 0;
|
|
if (raw_mode == mode_faketcp) {
|
|
sprintf(tmp_pattern, "-s %s -p tcp -m tcp --sport %d", remote_addr.get_ip(), remote_addr.get_port());
|
|
}
|
|
if (raw_mode == mode_udp) {
|
|
sprintf(tmp_pattern, "-s %s -p udp -m udp --sport %d", remote_addr.get_ip(), remote_addr.get_port());
|
|
}
|
|
if (raw_mode == mode_icmp) {
|
|
if (raw_ip_version == AF_INET)
|
|
sprintf(tmp_pattern, "-s %s -p icmp --icmp-type 0", remote_addr.get_ip());
|
|
else
|
|
sprintf(tmp_pattern, "-s %s -p icmpv6 --icmpv6-type 129", remote_addr.get_ip());
|
|
}
|
|
pattern += tmp_pattern;
|
|
}
|
|
if (program_mode == server_mode) {
|
|
tmp_pattern[0] = 0;
|
|
if (raw_ip_version == AF_INET) {
|
|
if (local_addr.inner.ipv4.sin_addr.s_addr != 0) {
|
|
sprintf(tmp_pattern, "-d %s ", local_addr.get_ip());
|
|
}
|
|
} else {
|
|
char zero_arr[16] = {0};
|
|
if (memcmp(&local_addr.inner.ipv6.sin6_addr, zero_arr, 16) != 0) {
|
|
sprintf(tmp_pattern, "-d %s ", local_addr.get_ip());
|
|
}
|
|
}
|
|
pattern += tmp_pattern;
|
|
|
|
tmp_pattern[0] = 0;
|
|
if (raw_mode == mode_faketcp) {
|
|
sprintf(tmp_pattern, "-p tcp -m tcp --dport %d", local_addr.get_port());
|
|
}
|
|
if (raw_mode == mode_udp) {
|
|
sprintf(tmp_pattern, "-p udp -m udp --dport %d", local_addr.get_port());
|
|
}
|
|
if (raw_mode == mode_icmp) {
|
|
if (raw_ip_version == AF_INET)
|
|
sprintf(tmp_pattern, "-p icmp --icmp-type 8");
|
|
else
|
|
sprintf(tmp_pattern, "-p icmpv6 --icmpv6-type 128");
|
|
}
|
|
pattern += tmp_pattern;
|
|
}
|
|
/*
|
|
if(!simple_rule)
|
|
{
|
|
pattern += " -m comment --comment udp2rawDwrW_";
|
|
|
|
char const_id_str[100];
|
|
sprintf(const_id_str, "%x_", const_id);
|
|
|
|
pattern += const_id_str;
|
|
|
|
time_t timer;
|
|
char buffer[26];
|
|
struct tm* tm_info;
|
|
|
|
time(&timer);
|
|
tm_info = localtime(&timer);
|
|
|
|
strftime(buffer, 26, "%Y-%m-%d-%H:%M:%S", tm_info);
|
|
|
|
pattern += buffer;
|
|
|
|
|
|
}*/
|
|
|
|
if (generate_iptables_rule) {
|
|
string rule = iptables_command + "-I INPUT ";
|
|
rule += pattern;
|
|
rule += " -j DROP";
|
|
|
|
printf("generated iptables rule:\n");
|
|
printf("%s\n", rule.c_str());
|
|
myexit(0);
|
|
}
|
|
if (generate_iptables_rule_add) {
|
|
iptables_gen_add(pattern.c_str(), const_id);
|
|
myexit(0);
|
|
}
|
|
|
|
if (auto_add_iptables_rule) {
|
|
iptables_rule_init(pattern.c_str(), const_id, keep_rule);
|
|
if (keep_rule) {
|
|
if (pthread_create(&keep_thread, NULL, run_keep, 0)) {
|
|
mylog(log_fatal, "Error creating thread\n");
|
|
myexit(-1);
|
|
}
|
|
keep_thread_running = 1;
|
|
}
|
|
} else {
|
|
mylog(log_warn, " -a has not been set, make sure you have added the needed iptables rules manually\n");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
int unit_test() {
|
|
printf("running unit test\n");
|
|
vector<string> conf_lines = {"---aaa", "--aaa bbb", "-a bbb", " \t \t \t-a\t \t \t bbbbb\t \t \t "};
|
|
for (int i = 0; i < int(conf_lines.size()); i++) {
|
|
printf("orign:%s\n", conf_lines[i].c_str());
|
|
auto res = parse_conf_line(conf_lines[i]);
|
|
printf("pasrse_result: size %d", int(res.size()));
|
|
for (int j = 0; j < int(res.size()); j++) {
|
|
printf("<%s>", res[j].c_str());
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
char s1[] = {1, 2, 3, 4, 5};
|
|
|
|
char s2[] = {1};
|
|
|
|
short c1 = csum((unsigned short *)s1, 5);
|
|
short c2 = csum((unsigned short *)s2, 1);
|
|
// c2=0;
|
|
|
|
printf("%x %x\n", (int)c1, (int)c2);
|
|
|
|
const char buf[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 2, 13, 14, 15, 16};
|
|
char key[100] = {0};
|
|
char buf2[100] = {0};
|
|
char buf3[100] = {0};
|
|
char buf4[100] = {0};
|
|
int len = 16;
|
|
for (int i = 0; i < len; i++) {
|
|
printf("<%d>", buf[i]);
|
|
}
|
|
printf("\n");
|
|
cipher_encrypt(buf, buf2, len, key);
|
|
for (int i = 0; i < len; i++) {
|
|
printf("<%d>", buf2[i]);
|
|
}
|
|
printf("\n");
|
|
int temp_len = len;
|
|
cipher_decrypt(buf2, buf3, len, key);
|
|
for (int i = 0; i < len; i++) {
|
|
printf("<%d>", buf3[i]);
|
|
}
|
|
printf("\n");
|
|
cipher_encrypt(buf2, buf4, temp_len, key);
|
|
for (int i = 0; i < temp_len; i++) {
|
|
printf("<%d>", buf4[i]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifdef UDP2RAW_LINUX
|
|
int set_timer(int epollfd, int &timer_fd) // put a timer_fd into epoll,general function,used both in client and server
|
|
{
|
|
int ret;
|
|
epoll_event ev;
|
|
|
|
itimerspec its;
|
|
memset(&its, 0, sizeof(its));
|
|
|
|
if ((timer_fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK)) < 0) {
|
|
mylog(log_fatal, "timer_fd create error\n");
|
|
myexit(1);
|
|
}
|
|
its.it_interval.tv_sec = (timer_interval / 1000);
|
|
its.it_interval.tv_nsec = (timer_interval % 1000) * 1000ll * 1000ll;
|
|
its.it_value.tv_nsec = 1; // imidiately
|
|
timerfd_settime(timer_fd, 0, &its, 0);
|
|
|
|
ev.events = EPOLLIN;
|
|
ev.data.u64 = timer_fd;
|
|
|
|
ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, timer_fd, &ev);
|
|
if (ret < 0) {
|
|
mylog(log_fatal, "epoll_ctl return %d\n", ret);
|
|
myexit(-1);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int set_timer_server(int epollfd, int &timer_fd, fd64_t &fd64) // only for server
|
|
{
|
|
int ret;
|
|
epoll_event ev;
|
|
|
|
itimerspec its;
|
|
memset(&its, 0, sizeof(its));
|
|
|
|
if ((timer_fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK)) < 0) {
|
|
mylog(log_fatal, "timer_fd create error\n");
|
|
myexit(1);
|
|
}
|
|
its.it_interval.tv_sec = (timer_interval / 1000);
|
|
its.it_interval.tv_nsec = (timer_interval % 1000) * 1000ll * 1000ll;
|
|
its.it_value.tv_nsec = 1; // imidiately
|
|
timerfd_settime(timer_fd, 0, &its, 0);
|
|
|
|
fd64 = fd_manager.create(timer_fd);
|
|
|
|
ev.events = EPOLLIN;
|
|
ev.data.u64 = fd64; ////difference
|
|
|
|
ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, timer_fd, &ev);
|
|
if (ret < 0) {
|
|
mylog(log_fatal, "epoll_ctl return %d\n", ret);
|
|
myexit(-1);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int handle_lower_level(raw_info_t &raw_info) // fill lower_level info,when --lower-level is enabled,only for server
|
|
{
|
|
packet_info_t &send_info = raw_info.send_info;
|
|
packet_info_t &recv_info = raw_info.recv_info;
|
|
|
|
if (lower_level_manual) {
|
|
memset(&send_info.addr_ll, 0, sizeof(send_info.addr_ll));
|
|
send_info.addr_ll.sll_family = AF_PACKET;
|
|
send_info.addr_ll.sll_ifindex = ifindex;
|
|
send_info.addr_ll.sll_halen = ETHER_ADDR_LEN;
|
|
send_info.addr_ll.sll_protocol = htons(ETH_P_IP);
|
|
memcpy(&send_info.addr_ll.sll_addr, dest_hw_addr, ETHER_ADDR_LEN);
|
|
mylog(log_debug, "[manual]lower level info %x %x\n ", send_info.addr_ll.sll_halen, send_info.addr_ll.sll_protocol);
|
|
} else {
|
|
memset(&send_info.addr_ll, 0, sizeof(send_info.addr_ll));
|
|
send_info.addr_ll.sll_family = recv_info.addr_ll.sll_family;
|
|
send_info.addr_ll.sll_ifindex = recv_info.addr_ll.sll_ifindex;
|
|
send_info.addr_ll.sll_protocol = recv_info.addr_ll.sll_protocol;
|
|
send_info.addr_ll.sll_halen = recv_info.addr_ll.sll_halen;
|
|
memcpy(send_info.addr_ll.sll_addr, recv_info.addr_ll.sll_addr, sizeof(send_info.addr_ll.sll_addr));
|
|
// other bytes should be kept zero.
|
|
|
|
mylog(log_debug, "[auto]lower level info %x %x\n ", send_info.addr_ll.sll_halen, send_info.addr_ll.sll_protocol);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
string chain[2];
|
|
string rule_keep[2];
|
|
string rule_keep_add[2];
|
|
string rule_keep_del[2];
|
|
u64_t keep_rule_last_time = 0;
|
|
|
|
pthread_t keep_thread;
|
|
int keep_thread_running = 0;
|
|
int iptables_gen_add(const char *s, u32_t const_id) {
|
|
string dummy = "";
|
|
iptables_pattern = s;
|
|
chain[0] = dummy + "udp2rawDwrW_C";
|
|
rule_keep[0] = dummy + iptables_pattern + " -j " + chain[0];
|
|
rule_keep_add[0] = iptables_command + "-I INPUT " + rule_keep[0];
|
|
|
|
char *output;
|
|
run_command(iptables_command + "-N " + chain[0], output, show_none);
|
|
run_command(iptables_command + "-F " + chain[0], output);
|
|
run_command(iptables_command + "-I " + chain[0] + " -j DROP", output);
|
|
|
|
rule_keep_del[0] = iptables_command + "-D INPUT " + rule_keep[0];
|
|
|
|
run_command(rule_keep_del[0], output, show_none);
|
|
run_command(rule_keep_del[0], output, show_none);
|
|
|
|
if (run_command(rule_keep_add[0], output) != 0) {
|
|
mylog(log_fatal, "auto added iptables failed by: %s\n", rule_keep_add[0].c_str());
|
|
myexit(-1);
|
|
}
|
|
return 0;
|
|
}
|
|
int iptables_rule_init(const char *s, u32_t const_id, int keep) {
|
|
iptables_pattern = s;
|
|
iptables_rule_added = 1;
|
|
iptables_rule_keeped = keep;
|
|
|
|
string dummy = "";
|
|
char const_id_str[100];
|
|
sprintf(const_id_str, "%x", const_id);
|
|
|
|
chain[0] = dummy + "udp2rawDwrW_" + const_id_str + "_C0";
|
|
chain[1] = dummy + "udp2rawDwrW_" + const_id_str + "_C1";
|
|
|
|
rule_keep[0] = dummy + iptables_pattern + " -j " + chain[0];
|
|
rule_keep[1] = dummy + iptables_pattern + " -j " + chain[1];
|
|
|
|
rule_keep_add[0] = iptables_command + "-I INPUT " + rule_keep[0];
|
|
rule_keep_add[1] = iptables_command + "-I INPUT " + rule_keep[1];
|
|
|
|
rule_keep_del[0] = iptables_command + "-D INPUT " + rule_keep[0];
|
|
rule_keep_del[1] = iptables_command + "-D INPUT " + rule_keep[1];
|
|
|
|
keep_rule_last_time = get_current_time();
|
|
|
|
char *output;
|
|
|
|
for (int i = 0; i <= iptables_rule_keeped; i++) {
|
|
run_command(iptables_command + "-N " + chain[i], output);
|
|
run_command(iptables_command + "-F " + chain[i], output);
|
|
run_command(iptables_command + "-I " + chain[i] + " -j DROP", output);
|
|
|
|
if (run_command(rule_keep_add[i], output) != 0) {
|
|
mylog(log_fatal, "auto added iptables failed by: %s\n", rule_keep_add[i].c_str());
|
|
myexit(-1);
|
|
}
|
|
}
|
|
mylog(log_warn, "auto added iptables rules\n");
|
|
return 0;
|
|
}
|
|
|
|
int keep_iptables_rule() // magic to work on a machine without grep/iptables --check/-m commment
|
|
{
|
|
/*
|
|
if(iptables_rule_keeped==0) return 0;
|
|
|
|
|
|
uint64_t tmp_current_time=get_current_time();
|
|
if(tmp_current_time-keep_rule_last_time<=iptables_rule_keep_interval)
|
|
{
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
keep_rule_last_time=tmp_current_time;
|
|
}*/
|
|
|
|
mylog(log_debug, "keep_iptables_rule begin %llu\n", get_current_time());
|
|
iptables_rule_keep_index += 1;
|
|
iptables_rule_keep_index %= 2;
|
|
|
|
string dummy = "";
|
|
char *output;
|
|
|
|
int i = iptables_rule_keep_index;
|
|
|
|
run_command(iptables_command + "-N " + chain[i], output, show_none);
|
|
|
|
if (run_command(iptables_command + "-F " + chain[i], output, show_none) != 0)
|
|
mylog(log_warn, "iptables -F failed %d\n", i);
|
|
|
|
if (run_command(iptables_command + "-I " + chain[i] + " -j DROP", output, show_none) != 0)
|
|
mylog(log_warn, "iptables -I failed %d\n", i);
|
|
|
|
if (run_command(rule_keep_del[i], output, show_none) != 0)
|
|
mylog(log_warn, "rule_keep_del failed %d\n", i);
|
|
|
|
run_command(rule_keep_del[i], output, show_none); // do it twice,incase it fails for unknown random reason
|
|
|
|
if (run_command(rule_keep_add[i], output, show_log) != 0)
|
|
mylog(log_warn, "rule_keep_del failed %d\n", i);
|
|
|
|
mylog(log_debug, "keep_iptables_rule end %llu\n", get_current_time());
|
|
return 0;
|
|
}
|
|
|
|
int clear_iptables_rule() {
|
|
char *output;
|
|
string dummy = "";
|
|
if (!iptables_rule_added) return 0;
|
|
|
|
for (int i = 0; i <= iptables_rule_keeped; i++) {
|
|
run_command(rule_keep_del[i], output);
|
|
run_command(iptables_command + "-F " + chain[i], output);
|
|
run_command(iptables_command + "-X " + chain[i], output);
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef UDP2RAW_MP
|
|
void iptables_rule() // handles -a -g --gen-add --keep-rule --clear --wait-lock
|
|
{
|
|
if (generate_iptables_rule) {
|
|
if (raw_mode == mode_faketcp && use_tcp_dummy_socket == 1) {
|
|
mylog(log_fatal, "failed,-g doesnt work with easy-faketcp mode\n");
|
|
myexit(-1);
|
|
}
|
|
if (raw_mode == mode_udp) {
|
|
mylog(log_warn, "It not necessary to use iptables/firewall rule in udp mode\n");
|
|
}
|
|
log_bare(log_warn, "for linux, use:\n");
|
|
if (raw_ip_version == AF_INET) {
|
|
if (raw_mode == mode_faketcp)
|
|
printf("iptables -I INPUT -s %s -p tcp -m tcp --sport %d -j DROP\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
if (raw_mode == mode_udp)
|
|
printf("iptables -I INPUT -s %s -p udp -m udp --sport %d -j DROP\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
if (raw_mode == mode_icmp)
|
|
printf("iptables -I INPUT -s %s -p icmp --icmp-type 0 -j DROP\n", remote_addr.get_ip());
|
|
printf("\n");
|
|
} else {
|
|
assert(raw_ip_version == AF_INET6);
|
|
if (raw_mode == mode_faketcp)
|
|
printf("ip6tables -I INPUT -s %s -p tcp -m tcp --sport %d -j DROP\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
if (raw_mode == mode_udp)
|
|
printf("ip6tables -I INPUT -s %s -p udp -m udp --sport %d -j DROP\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
if (raw_mode == mode_icmp)
|
|
printf("ip6tables -I INPUT -s %s -p -p icmpv6 --icmpv6-type 129 -j DROP\n", remote_addr.get_ip());
|
|
printf("\n");
|
|
}
|
|
|
|
log_bare(log_warn, "for mac/bsd use:\n");
|
|
if (raw_ip_version == AF_INET) {
|
|
if (raw_mode == mode_faketcp)
|
|
printf("echo 'block drop inet proto tcp from %s port %d to any' > ./1.conf\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
if (raw_mode == mode_udp)
|
|
printf("echo 'block drop inet proto udp from %s port %d to any' > ./1.conf\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
if (raw_mode == mode_icmp)
|
|
printf("echo 'block drop inet proto icmp from %s to any' > ./1.conf\n", remote_addr.get_ip());
|
|
} else {
|
|
assert(raw_ip_version == AF_INET6);
|
|
if (raw_mode == mode_faketcp)
|
|
printf("echo 'block drop inet6 proto tcp from %s port %d to any' > ./1.conf\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
if (raw_mode == mode_udp)
|
|
printf("echo 'block drop inet6 proto udp from %s port %d to any' > ./1.conf\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
if (raw_mode == mode_icmp)
|
|
printf("echo 'block drop inet6 proto icmp6 from %s to any' > ./1.conf\n", remote_addr.get_ip());
|
|
}
|
|
printf("pfctl -f ./1.conf\n");
|
|
printf("pfctl -e\n");
|
|
printf("\n");
|
|
|
|
log_bare(log_warn, "for windows vista and above use:\n");
|
|
if (raw_ip_version == AF_INET) {
|
|
if (raw_mode == mode_faketcp) {
|
|
printf("netsh advfirewall firewall add rule name=udp2raw protocol=TCP dir=in remoteip=%s remoteport=%d action=block\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
printf("netsh advfirewall firewall add rule name=udp2raw protocol=TCP dir=out remoteip=%s remoteport=%d action=block\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
}
|
|
if (raw_mode == mode_udp) {
|
|
printf("netsh advfirewall firewall add rule name=udp2raw protocol=UDP dir=in remoteip=%s remoteport=%d action=block\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
printf("netsh advfirewall firewall add rule name=udp2raw protocol=UDP dir=out remoteip=%s remoteport=%d action=block\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
}
|
|
|
|
if (raw_mode == mode_icmp) {
|
|
printf("netsh advfirewall firewall add rule name=udp2raw protocol=ICMPV4 dir=in remoteip=%s action=block\n", remote_addr.get_ip());
|
|
printf("netsh advfirewall firewall add rule name=udp2raw protocol=ICMPV4 dir=out remoteip=%s action=block\n", remote_addr.get_ip());
|
|
}
|
|
} else {
|
|
assert(raw_ip_version == AF_INET6);
|
|
if (raw_mode == mode_faketcp) {
|
|
printf("netsh advfirewall firewall add rule name=udp2raw protocol=TCP dir=in remoteip=%s remoteport=%d action=block\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
printf("netsh advfirewall firewall add rule name=udp2raw protocol=TCP dir=out remoteip=%s remoteport=%d action=block\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
}
|
|
if (raw_mode == mode_udp) {
|
|
printf("netsh advfirewall firewall add rule name=udp2raw protocol=UDP dir=in remoteip=%s remoteport=%d action=block\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
printf("netsh advfirewall firewall add rule name=udp2raw protocol=UDP dir=out remoteip=%s remoteport=%d action=block\n", remote_addr.get_ip(), remote_addr.get_port());
|
|
}
|
|
|
|
if (raw_mode == mode_icmp) {
|
|
printf("netsh advfirewall firewall add rule name=udp2raw protocol=ICMPV6 dir=in remoteip=%s action=block\n", remote_addr.get_ip());
|
|
printf("netsh advfirewall firewall add rule name=udp2raw protocol=ICMPV6 dir=out remoteip=%s action=block\n", remote_addr.get_ip());
|
|
}
|
|
}
|
|
|
|
myexit(0);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void signal_handler(int sig) {
|
|
about_to_exit = 1;
|
|
// myexit(0);
|
|
}
|