mirror of
https://github.com/wangyu-/udp2raw.git
synced 2024-06-25 16:39:16 +00:00
3423 lines
91 KiB
C++
Executable File
3423 lines
91 KiB
C++
Executable File
#include "common.h"
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#include "network.h"
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#include "log.h"
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#include "lib/md5.h"
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#include "encrypt.h"
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#include <fstream>
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#include <string>
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#include <vector>
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#include <map>
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#include <set>
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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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int force_source_ip=0; //if --source-ip is enabled
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id_t const_id=0;//an id used for connection recovery,its generated randomly,it never change since its generated
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const int disable_conv_clear=0;//a udp connection in the multiplexer is called conversation in this program,conv for short.
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const int disable_conn_clear=0;//a raw connection is called conn.
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enum server_current_state_t {server_idle=0,server_handshake1,server_ready}; //server state machine
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enum client_current_state_t {client_idle=0,client_tcp_handshake,client_handshake1,client_handshake2,client_ready};//client state machine
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union current_state_t
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{
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server_current_state_t server_current_state;
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client_current_state_t client_current_state;
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};
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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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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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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 debug_resend=0; // debug only
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int disable_anti_replay=0;//if anti_replay windows is diabled
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char key_string[1000]= "secret key";// -k option
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char key[16];//generated from key_string by md5.
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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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//uint64_t current_time_rough=0;
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int VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV;
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////////==============================variable divider=============================================================
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struct anti_replay_t //its for anti replay attack,similar to openvpn/ipsec 's anti replay window
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{
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u64_t max_packet_received;
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char window[anti_replay_window_size];
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anti_replay_seq_t anti_replay_seq;
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anti_replay_seq_t get_new_seq_for_send()
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{
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return anti_replay_seq++;
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}
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anti_replay_t()
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{
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max_packet_received=0;
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anti_replay_seq=get_true_random_number_64()/10;//random first seq
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//memset(window,0,sizeof(window)); //not necessary
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}
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void re_init()
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{
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max_packet_received=0;
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//memset(window,0,sizeof(window));
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}
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int is_vaild(u64_t seq)
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{
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if(disable_anti_replay) return 1;
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//if(disabled) return 0;
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if(seq==max_packet_received) return 0;
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else if(seq>max_packet_received)
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{
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if(seq-max_packet_received>=anti_replay_window_size)
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{
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memset(window,0,sizeof(window));
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window[seq%anti_replay_window_size]=1;
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}
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else
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{
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for (u64_t i=max_packet_received+1;i<seq;i++)
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window[i%anti_replay_window_size]=0;
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window[seq%anti_replay_window_size]=1;
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}
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max_packet_received=seq;
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return 1;
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}
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else if(seq<max_packet_received)
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{
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if(max_packet_received-seq>=anti_replay_window_size) return 0;
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else
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{
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if (window[seq%anti_replay_window_size]==1) return 0;
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else
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{
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window[seq%anti_replay_window_size]=1;
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return 1;
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}
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}
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}
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return 0; //for complier check
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}
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};//anti_replay;
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void server_clear_function(u64_t u64);
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struct conv_manager_t // manage the udp connections
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{
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//typedef hash_map map;
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unordered_map<u64_t,u32_t> u64_to_conv; //conv and u64 are both supposed to be uniq
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unordered_map<u32_t,u64_t> conv_to_u64;
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unordered_map<u32_t,u64_t> conv_last_active_time;
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unordered_map<u32_t,u64_t>::iterator clear_it;
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unordered_map<u32_t,u64_t>::iterator it;
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unordered_map<u32_t,u64_t>::iterator old_it;
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//void (*clear_function)(uint64_t u64) ;
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long long last_clear_time;
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conv_manager_t()
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{
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clear_it=conv_last_active_time.begin();
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long long last_clear_time=0;
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//clear_function=0;
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}
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~conv_manager_t()
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{
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clear();
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}
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int get_size()
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{
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return conv_to_u64.size();
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}
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void reserve()
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{
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u64_to_conv.reserve(10007);
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conv_to_u64.reserve(10007);
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conv_last_active_time.reserve(10007);
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}
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void clear()
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{
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if(disable_conv_clear) return ;
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if(program_mode==server_mode)
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{
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for(it=conv_to_u64.begin();it!=conv_to_u64.end();it++)
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{
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//int fd=int((it->second<<32u)>>32u);
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server_clear_function( it->second);
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}
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}
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u64_to_conv.clear();
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conv_to_u64.clear();
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conv_last_active_time.clear();
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clear_it=conv_last_active_time.begin();
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}
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u32_t get_new_conv()
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{
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u32_t conv=get_true_random_number_nz();
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while(conv_to_u64.find(conv)!=conv_to_u64.end())
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{
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conv=get_true_random_number_nz();
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}
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return conv;
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}
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int is_conv_used(u32_t conv)
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{
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return conv_to_u64.find(conv)!=conv_to_u64.end();
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}
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int is_u64_used(u64_t u64)
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{
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return u64_to_conv.find(u64)!=u64_to_conv.end();
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}
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u32_t find_conv_by_u64(u64_t u64)
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{
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return u64_to_conv[u64];
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}
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u64_t find_u64_by_conv(u32_t conv)
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{
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return conv_to_u64[conv];
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}
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int update_active_time(u32_t conv)
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{
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return conv_last_active_time[conv]=get_current_time();
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}
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int insert_conv(u32_t conv,u64_t u64)
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{
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u64_to_conv[u64]=conv;
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conv_to_u64[conv]=u64;
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conv_last_active_time[conv]=get_current_time();
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return 0;
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}
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int erase_conv(u32_t conv)
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{
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if(disable_conv_clear) return 0;
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u64_t u64=conv_to_u64[conv];
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if(program_mode==server_mode)
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{
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server_clear_function(u64);
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}
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conv_to_u64.erase(conv);
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u64_to_conv.erase(u64);
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conv_last_active_time.erase(conv);
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return 0;
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}
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int clear_inactive(char * ip_port=0)
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{
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if(get_current_time()-last_clear_time>conv_clear_interval)
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{
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last_clear_time=get_current_time();
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return clear_inactive0(ip_port);
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}
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return 0;
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}
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int clear_inactive0(char * ip_port)
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{
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if(disable_conv_clear) return 0;
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//map<uint32_t,uint64_t>::iterator it;
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int cnt=0;
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it=clear_it;
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int size=conv_last_active_time.size();
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int num_to_clean=size/conv_clear_ratio+conv_clear_min; //clear 1/10 each time,to avoid latency glitch
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num_to_clean=min(num_to_clean,size);
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u64_t current_time=get_current_time();
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for(;;)
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{
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if(cnt>=num_to_clean) break;
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if(conv_last_active_time.begin()==conv_last_active_time.end()) break;
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if(it==conv_last_active_time.end())
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{
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it=conv_last_active_time.begin();
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}
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if( current_time -it->second >conv_timeout )
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{
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//mylog(log_info,"inactive conv %u cleared \n",it->first);
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old_it=it;
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it++;
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u32_t conv= old_it->first;
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erase_conv(old_it->first);
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if(ip_port==0)
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{
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mylog(log_info,"conv %x cleared\n",conv);
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}
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else
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{
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mylog(log_info,"[%s]conv %x cleared\n",ip_port,conv);
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}
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}
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else
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{
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it++;
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}
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cnt++;
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}
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return 0;
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}
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};//g_conv_manager;
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struct blob_t //used in conn_info_t. conv_manager_t and anti_replay_t are costly data structures ,we dont allocate them until its necessary
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{
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conv_manager_t conv_manager;
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anti_replay_t anti_replay;
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};
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struct conn_info_t //stores info for a raw connection.for client ,there is only one connection,for server there can be thousand of connection since server can
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//handle multiple clients
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{
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current_state_t state;
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raw_info_t raw_info;
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u64_t last_state_time;
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u64_t last_hb_sent_time; //client re-use this for retry
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u64_t last_hb_recv_time;
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//long long last_resent_time;
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id_t my_id;
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id_t oppsite_id;
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int timer_fd;
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id_t oppsite_const_id;
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blob_t *blob;
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uint8_t my_roller;
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uint8_t oppsite_roller;
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u64_t last_oppsite_roller_time;
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/*
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const uint32_t &ip=raw_info.recv_info.src_ip;
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const uint16_t &port=raw_info.recv_info.src_port;
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*/
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void recover(const conn_info_t &conn_info)
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{
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raw_info=conn_info.raw_info;
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last_state_time=conn_info.last_state_time;
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last_hb_recv_time=conn_info.last_hb_recv_time;
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last_hb_sent_time=conn_info.last_hb_sent_time;
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my_id=conn_info.my_id;
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oppsite_id=conn_info.oppsite_id;
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blob->anti_replay.re_init();
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my_roller=0;//no need to set,but for easier debug,set it to zero
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oppsite_roller=0;//same as above
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last_oppsite_roller_time=0;
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}
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void re_init()
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{
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//send_packet_info.protocol=g_packet_info_send.protocol;
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if(program_mode==server_mode)
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state.server_current_state=server_idle;
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else
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state.client_current_state=client_idle;
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last_state_time=0;
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oppsite_const_id=0;
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timer_fd=0;
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my_roller=0;
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oppsite_roller=0;
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last_oppsite_roller_time=0;
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}
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conn_info_t()
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{
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blob=0;
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re_init();
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}
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void prepare()
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{
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blob=new blob_t;
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}
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conn_info_t(const conn_info_t&b)
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{
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//mylog(log_error,"called!!!!!!!!!!!!!\n");
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*this=b;
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if(blob!=0)
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{
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blob=new blob_t(*b.blob);
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}
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}
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conn_info_t& operator=(const conn_info_t& b)
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{
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mylog(log_fatal,"not allowed\n");
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myexit(-1);
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return *this;
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}
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~conn_info_t();
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};//g_conn_info;
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struct conn_manager_t //manager for connections. for client,we dont need conn_manager since there is only one connection.for server we use one conn_manager for all connections
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{
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u32_t ready_num;
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unordered_map<int,conn_info_t *> udp_fd_mp; //a bit dirty to used pointer,but can void unordered_map search
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unordered_map<int,conn_info_t *> timer_fd_mp;//we can use pointer here since unordered_map.rehash() uses shallow copy
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unordered_map<id_t,conn_info_t *> const_id_mp;
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unordered_map<u64_t,conn_info_t*> mp; //put it at end so that it de-consturcts first
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unordered_map<u64_t,conn_info_t*>::iterator clear_it;
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long long last_clear_time;
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conn_manager_t()
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{
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ready_num=0;
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mp.reserve(10007);
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clear_it=mp.begin();
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timer_fd_mp.reserve(10007);
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const_id_mp.reserve(10007);
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udp_fd_mp.reserve(100007);
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last_clear_time=0;
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//current_ready_ip=0;
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// current_ready_port=0;
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}
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int exist(u32_t ip,uint16_t port)
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{
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u64_t u64=0;
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u64=ip;
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u64<<=32u;
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u64|=port;
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if(mp.find(u64)!=mp.end())
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{
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return 1;
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}
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return 0;
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}
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/*
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int insert(uint32_t ip,uint16_t port)
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{
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uint64_t u64=0;
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u64=ip;
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u64<<=32u;
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u64|=port;
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mp[u64];
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return 0;
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}*/
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conn_info_t *& find_insert_p(u32_t ip,uint16_t port) //be aware,the adress may change after rehash
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{
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u64_t u64=0;
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u64=ip;
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u64<<=32u;
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u64|=port;
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unordered_map<u64_t,conn_info_t*>::iterator it=mp.find(u64);
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if(it==mp.end())
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{
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mp[u64]=new conn_info_t;
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}
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return mp[u64];
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}
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conn_info_t & find_insert(u32_t ip,uint16_t port) //be aware,the adress may change after rehash
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{
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u64_t u64=0;
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u64=ip;
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u64<<=32u;
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u64|=port;
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unordered_map<u64_t,conn_info_t*>::iterator it=mp.find(u64);
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if(it==mp.end())
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{
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mp[u64]=new conn_info_t;
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}
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return *mp[u64];
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}
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int erase(unordered_map<u64_t,conn_info_t*>::iterator erase_it)
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{
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if(erase_it->second->state.server_current_state==server_ready)
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{
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ready_num--;
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assert(i32_t(ready_num)!=-1);
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assert(erase_it->second!=0);
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assert(erase_it->second->timer_fd !=0);
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assert(erase_it->second->oppsite_const_id!=0);
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assert(const_id_mp.find(erase_it->second->oppsite_const_id)!=const_id_mp.end());
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assert(timer_fd_mp.find(erase_it->second->timer_fd)!=timer_fd_mp.end());
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const_id_mp.erase(erase_it->second->oppsite_const_id);
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timer_fd_mp.erase(erase_it->second->timer_fd);
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close(erase_it->second->timer_fd);// close will auto delte it from epoll
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delete(erase_it->second);
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mp.erase(erase_it->first);
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}
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else
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{
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assert(erase_it->second->blob==0);
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assert(erase_it->second->timer_fd ==0);
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assert(erase_it->second->oppsite_const_id==0);
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delete(erase_it->second);
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mp.erase(erase_it->first);
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}
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return 0;
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}
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int clear_inactive()
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{
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if(get_current_time()-last_clear_time>conn_clear_interval)
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{
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last_clear_time=get_current_time();
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return clear_inactive0();
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}
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return 0;
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}
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int clear_inactive0()
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{
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unordered_map<u64_t,conn_info_t*>::iterator it;
|
|
unordered_map<u64_t,conn_info_t*>::iterator old_it;
|
|
|
|
if(disable_conn_clear) return 0;
|
|
|
|
//map<uint32_t,uint64_t>::iterator it;
|
|
int cnt=0;
|
|
it=clear_it;
|
|
int size=mp.size();
|
|
int num_to_clean=size/conn_clear_ratio+conn_clear_min; //clear 1/10 each time,to avoid latency glitch
|
|
|
|
mylog(log_trace,"mp.size() %d\n", size);
|
|
|
|
num_to_clean=min(num_to_clean,(int)mp.size());
|
|
u64_t current_time=get_current_time();
|
|
|
|
for(;;)
|
|
{
|
|
if(cnt>=num_to_clean) break;
|
|
if(mp.begin()==mp.end()) break;
|
|
|
|
if(it==mp.end())
|
|
{
|
|
it=mp.begin();
|
|
}
|
|
|
|
if(it->second->state.server_current_state==server_ready &¤t_time - it->second->last_hb_recv_time <=server_conn_timeout)
|
|
{
|
|
it++;
|
|
}
|
|
else if(it->second->state.server_current_state!=server_ready&& current_time - it->second->last_state_time <=server_handshake_timeout )
|
|
{
|
|
it++;
|
|
}
|
|
else if(it->second->blob!=0&&it->second->blob->conv_manager.get_size() >0)
|
|
{
|
|
assert(it->second->state.server_current_state==server_ready);
|
|
it++;
|
|
}
|
|
else
|
|
{
|
|
mylog(log_info,"[%s:%d]inactive conn cleared \n",my_ntoa(it->second->raw_info.recv_info.src_ip),it->second->raw_info.recv_info.src_port);
|
|
old_it=it;
|
|
it++;
|
|
erase(old_it);
|
|
}
|
|
cnt++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
}conn_manager;
|
|
|
|
conn_info_t::~conn_info_t()
|
|
{
|
|
if(program_mode==server_mode)
|
|
{
|
|
if(state.server_current_state==server_ready)
|
|
{
|
|
assert(blob!=0);
|
|
assert(oppsite_const_id!=0);
|
|
//assert(conn_manager.const_id_mp.find(oppsite_const_id)!=conn_manager.const_id_mp.end()); // conn_manager 's deconstuction function erases it
|
|
}
|
|
else
|
|
{
|
|
assert(blob==0);
|
|
assert(oppsite_const_id==0);
|
|
}
|
|
}
|
|
//if(oppsite_const_id!=0) //do this at conn_manager 's deconstuction function
|
|
//conn_manager.const_id_mp.erase(oppsite_const_id);
|
|
if(blob!=0)
|
|
delete blob;
|
|
|
|
//send_packet_info.protocol=g_packet_info_send.protocol;
|
|
}
|
|
|
|
int TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT;
|
|
////////==========================type divider=======================================================
|
|
|
|
int server_on_raw_recv_pre_ready(conn_info_t &conn_info,char * ip_port,u32_t tmp_oppsite_const_id);
|
|
int server_on_raw_recv_ready(conn_info_t &conn_info,char * ip_port,char type,char *data,int data_len);
|
|
int server_on_raw_recv_handshake1(conn_info_t &conn_info,char * ip_port,char * data, int data_len);
|
|
|
|
void process_arg(int argc, char *argv[]);
|
|
int find_lower_level_info(u32_t ip,u32_t &dest_ip,string &if_name,string &hw);
|
|
int DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD;
|
|
////////////////=======================declear divider=============================
|
|
|
|
void server_clear_function(u64_t u64)//used in conv_manager in server mode.for server we have to use one udp fd for one conv(udp connection),
|
|
//so we have to close the fd when conv expires
|
|
{
|
|
int fd=int(u64);
|
|
int ret;
|
|
assert(fd!=0);
|
|
/*
|
|
epoll_event ev;
|
|
|
|
ev.events = EPOLLIN;
|
|
ev.data.u64 = u64;
|
|
|
|
ret = epoll_ctl(epollfd, EPOLL_CTL_DEL, fd, &ev);
|
|
if (ret!=0)
|
|
{
|
|
mylog(log_fatal,"fd:%d epoll delete failed!!!!\n",fd);
|
|
myexit(-1); //this shouldnt happen
|
|
}*/ //no need
|
|
ret= close(fd); //closed fd should be auto removed from epoll
|
|
|
|
if (ret!=0)
|
|
{
|
|
mylog(log_fatal,"close fd %d failed !!!!\n",fd);
|
|
myexit(-1); //this shouldnt happen
|
|
}
|
|
//mylog(log_fatal,"size:%d !!!!\n",conn_manager.udp_fd_mp.size());
|
|
assert(conn_manager.udp_fd_mp.find(fd)!=conn_manager.udp_fd_mp.end());
|
|
conn_manager.udp_fd_mp.erase(fd);
|
|
}
|
|
|
|
|
|
|
|
|
|
int send_bare(raw_info_t &raw_info,const char* data,int len)//send function with encryption but no anti replay,this is used when client and server verifys each other
|
|
//you have to design the protocol carefully, so that you wont be affect by relay attack
|
|
{
|
|
if(len<0)
|
|
{
|
|
mylog(log_debug,"input_len <0\n");
|
|
return -1;
|
|
}
|
|
packet_info_t &send_info=raw_info.send_info;
|
|
packet_info_t &recv_info=raw_info.recv_info;
|
|
|
|
char send_data_buf[buf_len]; //buf for send data and send hb
|
|
char send_data_buf2[buf_len];
|
|
|
|
|
|
//static send_bare[buf_len];
|
|
iv_t iv=get_true_random_number_64();
|
|
padding_t padding=get_true_random_number_64();
|
|
|
|
memcpy(send_data_buf,&iv,sizeof(iv));
|
|
memcpy(send_data_buf+sizeof(iv),&padding,sizeof(padding));
|
|
|
|
send_data_buf[sizeof(iv)+sizeof(padding)]='b';
|
|
memcpy(send_data_buf+sizeof(iv)+sizeof(padding)+1,data,len);
|
|
int new_len=len+sizeof(iv)+sizeof(padding)+1;
|
|
|
|
if(my_encrypt(send_data_buf,send_data_buf2,new_len,key)!=0)
|
|
{
|
|
return -1;
|
|
}
|
|
send_raw0(raw_info,send_data_buf2,new_len);
|
|
return 0;
|
|
}
|
|
int parse_bare(const char *input,int input_len,char* & data,int & len) // a sub function used in recv_bare
|
|
{
|
|
static char recv_data_buf[buf_len];
|
|
|
|
if(input_len<0)
|
|
{
|
|
mylog(log_debug,"input_len <0\n");
|
|
return -1;
|
|
}
|
|
if(my_decrypt(input,recv_data_buf,input_len,key)!=0)
|
|
{
|
|
mylog(log_debug,"decrypt_fail in recv bare\n");
|
|
return -1;
|
|
}
|
|
if(recv_data_buf[sizeof(iv_t)+sizeof(padding_t)]!='b')
|
|
{
|
|
mylog(log_debug,"not a bare packet\n");
|
|
return -1;
|
|
}
|
|
len=input_len;
|
|
data=recv_data_buf+sizeof(iv_t)+sizeof(padding_t)+1;
|
|
len-=sizeof(iv_t)+sizeof(padding_t)+1;
|
|
if(len<0)
|
|
{
|
|
mylog(log_debug,"len <0\n");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
int recv_bare(raw_info_t &raw_info,char* & data,int & len)//recv function with encryption but no anti replay,this is used when client and server verifys each other
|
|
//you have to design the protocol carefully, so that you wont be affect by relay attack
|
|
{
|
|
packet_info_t &send_info=raw_info.send_info;
|
|
packet_info_t &recv_info=raw_info.recv_info;
|
|
|
|
if(recv_raw0(raw_info,data,len)<0)
|
|
{
|
|
//printf("recv_raw_fail in recv bare\n");
|
|
return -1;
|
|
}
|
|
if ((raw_mode == mode_faketcp && (recv_info.syn == 1 || recv_info.ack != 1)))
|
|
{
|
|
mylog(log_debug,"unexpect packet type recv_info.syn=%d recv_info.ack=%d \n",recv_info.syn,recv_info.ack);
|
|
return -1;
|
|
}
|
|
return parse_bare(data,len,data,len);
|
|
}
|
|
|
|
int send_handshake(raw_info_t &raw_info,id_t id1,id_t id2,id_t id3)// a warp for send_bare for sending handshake(this is not tcp handshake) easily
|
|
{
|
|
packet_info_t &send_info=raw_info.send_info;
|
|
packet_info_t &recv_info=raw_info.recv_info;
|
|
|
|
char * data;int len;
|
|
//len=sizeof(id_t)*3;
|
|
if(numbers_to_char(id1,id2,id3,data,len)!=0) return -1;
|
|
if(send_bare(raw_info,data,len)!=0) {mylog(log_warn,"send bare fail\n");return -1;}
|
|
return 0;
|
|
}
|
|
/*
|
|
int recv_handshake(packet_info_t &info,id_t &id1,id_t &id2,id_t &id3)
|
|
{
|
|
char * data;int len;
|
|
if(recv_bare(info,data,len)!=0) return -1;
|
|
|
|
if(char_to_numbers(data,len,id1,id2,id3)!=0) return -1;
|
|
|
|
return 0;
|
|
}*/
|
|
|
|
int send_safer(conn_info_t &conn_info,char type,const char* data,int len) //safer transfer function with anti-replay,when mutually verification is done.
|
|
{
|
|
|
|
packet_info_t &send_info=conn_info.raw_info.send_info;
|
|
packet_info_t &recv_info=conn_info.raw_info.recv_info;
|
|
|
|
if(type!='h'&&type!='d')
|
|
{
|
|
mylog(log_warn,"first byte is not h or d ,%x\n",type);
|
|
return -1;
|
|
}
|
|
|
|
|
|
|
|
char send_data_buf[buf_len]; //buf for send data and send hb
|
|
char send_data_buf2[buf_len];
|
|
|
|
|
|
|
|
id_t n_tmp_id=htonl(conn_info.my_id);
|
|
|
|
memcpy(send_data_buf,&n_tmp_id,sizeof(n_tmp_id));
|
|
|
|
n_tmp_id=htonl(conn_info.oppsite_id);
|
|
|
|
memcpy(send_data_buf+sizeof(n_tmp_id),&n_tmp_id,sizeof(n_tmp_id));
|
|
|
|
anti_replay_seq_t n_seq=hton64(conn_info.blob->anti_replay.get_new_seq_for_send());
|
|
|
|
memcpy(send_data_buf+sizeof(n_tmp_id)*2,&n_seq,sizeof(n_seq));
|
|
|
|
|
|
send_data_buf[sizeof(n_tmp_id)*2+sizeof(n_seq)]=type;
|
|
send_data_buf[sizeof(n_tmp_id)*2+sizeof(n_seq)+1]=conn_info.my_roller;
|
|
|
|
memcpy(send_data_buf+2+sizeof(n_tmp_id)*2+sizeof(n_seq),data,len);//data;
|
|
|
|
int new_len=len+sizeof(n_seq)+sizeof(n_tmp_id)*2+2;
|
|
|
|
if(my_encrypt(send_data_buf,send_data_buf2,new_len,key)!=0)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
if(send_raw0(conn_info.raw_info,send_data_buf2,new_len)!=0) return -1;
|
|
|
|
if(after_send_raw0(conn_info.raw_info)!=0) return -1;
|
|
|
|
return 0;
|
|
}
|
|
int send_data_safer(conn_info_t &conn_info,const char* data,int len,u32_t conv_num)//a wrap for send_safer for transfer data.
|
|
{
|
|
packet_info_t &send_info=conn_info.raw_info.send_info;
|
|
packet_info_t &recv_info=conn_info.raw_info.recv_info;
|
|
|
|
char send_data_buf[buf_len];
|
|
//send_data_buf[0]='d';
|
|
u32_t n_conv_num=htonl(conv_num);
|
|
memcpy(send_data_buf,&n_conv_num,sizeof(n_conv_num));
|
|
|
|
memcpy(send_data_buf+sizeof(n_conv_num),data,len);
|
|
int new_len=len+sizeof(n_conv_num);
|
|
send_safer(conn_info,'d',send_data_buf,new_len);
|
|
return 0;
|
|
|
|
}
|
|
int parse_safer(conn_info_t &conn_info,const char * input,int input_len,char &type,char* &data,int &len)//subfunction for recv_safer,allow overlap
|
|
{
|
|
static char recv_data_buf[buf_len];
|
|
|
|
// char *recv_data_buf=recv_data_buf0; //fix strict alias warning
|
|
if(my_decrypt(input,recv_data_buf,input_len,key)!=0)
|
|
{
|
|
//printf("decrypt fail\n");
|
|
return -1;
|
|
}
|
|
|
|
|
|
|
|
//char *a=recv_data_buf;
|
|
//id_t h_oppiste_id= ntohl ( *((id_t * )(recv_data_buf)) );
|
|
id_t h_oppsite_id;
|
|
memcpy(&h_oppsite_id,recv_data_buf,sizeof(h_oppsite_id));
|
|
h_oppsite_id=ntohl(h_oppsite_id);
|
|
|
|
//id_t h_my_id= ntohl ( *((id_t * )(recv_data_buf+sizeof(id_t))) );
|
|
id_t h_my_id;
|
|
memcpy(&h_my_id,recv_data_buf+sizeof(id_t),sizeof(h_my_id));
|
|
h_my_id=ntohl(h_my_id);
|
|
|
|
//anti_replay_seq_t h_seq= ntoh64 ( *((anti_replay_seq_t * )(recv_data_buf +sizeof(id_t) *2 )) );
|
|
anti_replay_seq_t h_seq;
|
|
memcpy(&h_seq,recv_data_buf +sizeof(id_t) *2 ,sizeof(h_seq));
|
|
h_seq=ntoh64(h_seq);
|
|
|
|
if(h_oppsite_id!=conn_info.oppsite_id||h_my_id!=conn_info.my_id)
|
|
{
|
|
mylog(log_debug,"id and oppsite_id verification failed %x %x %x %x \n",h_oppsite_id,conn_info.oppsite_id,h_my_id,conn_info.my_id);
|
|
return -1;
|
|
}
|
|
|
|
if (conn_info.blob->anti_replay.is_vaild(h_seq) != 1) {
|
|
mylog(log_debug,"dropped replay packet\n");
|
|
return -1;
|
|
}
|
|
|
|
//printf("recv _len %d\n ",recv_len);
|
|
data=recv_data_buf+sizeof(anti_replay_seq_t)+sizeof(id_t)*2;
|
|
len=input_len-(sizeof(anti_replay_seq_t)+sizeof(id_t)*2 );
|
|
|
|
|
|
if(data[0]!='h'&&data[0]!='d')
|
|
{
|
|
mylog(log_debug,"first byte is not h or d ,%x\n",data[0]);
|
|
return -1;
|
|
}
|
|
|
|
uint8_t roller=data[1];
|
|
|
|
|
|
type=data[0];
|
|
data+=2;
|
|
len-=2;
|
|
|
|
if(len<0)
|
|
{
|
|
mylog(log_debug,"len <0 ,%d\n",len);
|
|
return -1;
|
|
}
|
|
|
|
if(roller!=conn_info.oppsite_roller)
|
|
{
|
|
conn_info.oppsite_roller=roller;
|
|
conn_info.last_oppsite_roller_time=get_current_time();
|
|
}
|
|
conn_info.my_roller++;//increase on a successful recv
|
|
|
|
|
|
if(after_recv_raw0(conn_info.raw_info)!=0) return -1;
|
|
|
|
return 0;
|
|
}
|
|
int recv_safer(conn_info_t &conn_info,char &type,char* &data,int &len)///safer transfer function with anti-replay,when mutually verification is done.
|
|
{
|
|
packet_info_t &send_info=conn_info.raw_info.send_info;
|
|
packet_info_t &recv_info=conn_info.raw_info.recv_info;
|
|
|
|
char * recv_data;int recv_len;
|
|
static char recv_data_buf[buf_len];
|
|
|
|
if(recv_raw0(conn_info.raw_info,recv_data,recv_len)!=0) return -1;
|
|
|
|
return parse_safer(conn_info,recv_data,recv_len,type,data,len);
|
|
}
|
|
|
|
int try_to_list_and_bind(int port) //try to bind to a port,may fail.
|
|
{
|
|
int old_bind_fd=bind_fd;
|
|
|
|
if(raw_mode==mode_faketcp)
|
|
{
|
|
bind_fd=socket(AF_INET,SOCK_STREAM,0);
|
|
}
|
|
else if(raw_mode==mode_udp||raw_mode==mode_icmp)
|
|
{
|
|
bind_fd=socket(AF_INET,SOCK_DGRAM,0);
|
|
}
|
|
if(old_bind_fd!=-1)
|
|
{
|
|
close(old_bind_fd);
|
|
}
|
|
|
|
struct sockaddr_in temp_bind_addr={0};
|
|
//bzero(&temp_bind_addr, sizeof(temp_bind_addr));
|
|
|
|
temp_bind_addr.sin_family = AF_INET;
|
|
temp_bind_addr.sin_port = htons(port);
|
|
temp_bind_addr.sin_addr.s_addr = local_ip_uint32;
|
|
|
|
if (bind(bind_fd, (struct sockaddr*)&temp_bind_addr, sizeof(temp_bind_addr)) !=0)
|
|
{
|
|
mylog(log_debug,"bind fail\n");
|
|
return -1;
|
|
}
|
|
if(raw_mode==mode_faketcp)
|
|
{
|
|
|
|
if (listen(bind_fd, SOMAXCONN) != 0) {
|
|
mylog(log_warn,"listen fail\n");
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
int client_bind_to_a_new_port()//find a free port and bind to it.
|
|
{
|
|
int raw_send_port=10000+get_true_random_number()%(65535-10000);
|
|
for(int i=0;i<1000;i++)//try 1000 times at max,this should be enough
|
|
{
|
|
if (try_to_list_and_bind(raw_send_port)==0)
|
|
{
|
|
return raw_send_port;
|
|
}
|
|
}
|
|
mylog(log_fatal,"bind port fail\n");
|
|
myexit(-1);
|
|
return -1;////for compiler check
|
|
}
|
|
|
|
|
|
|
|
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)//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);
|
|
|
|
|
|
ev.events = EPOLLIN;
|
|
ev.data.u64 = pack_u64(2,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 get_src_adress(u32_t &ip);
|
|
int client_on_timer(conn_info_t &conn_info) //for client. called when a timer is ready in epoll
|
|
{
|
|
//keep_iptables_rule();
|
|
packet_info_t &send_info=conn_info.raw_info.send_info;
|
|
packet_info_t &recv_info=conn_info.raw_info.recv_info;
|
|
raw_info_t &raw_info=conn_info.raw_info;
|
|
conn_info.blob->conv_manager.clear_inactive();
|
|
mylog(log_trace,"timer!\n");
|
|
|
|
mylog(log_trace,"roller my %d,oppsite %d,%lld\n",int(conn_info.my_roller),int(conn_info.oppsite_roller),conn_info.last_oppsite_roller_time);
|
|
|
|
mylog(log_trace,"<client_on_timer,send_info.ts_ack= %u>\n",send_info.ts_ack);
|
|
|
|
|
|
|
|
|
|
if(conn_info.state.client_current_state==client_idle)
|
|
{
|
|
fail_time_counter++;
|
|
if(max_fail_time>0&&fail_time_counter>max_fail_time)
|
|
{
|
|
mylog(log_fatal,"max_fail_time exceed\n");
|
|
myexit(-1);
|
|
}
|
|
|
|
conn_info.blob->anti_replay.re_init();
|
|
conn_info.my_id = get_true_random_number_nz(); ///todo no need to do this everytime
|
|
|
|
u32_t new_ip=0;
|
|
if(!force_source_ip&&get_src_adress(new_ip)==0)
|
|
{
|
|
if(new_ip!=source_ip_uint32)
|
|
{
|
|
mylog(log_info,"source ip changed from %s to ",my_ntoa(source_ip_uint32));
|
|
log_bare(log_info,"%s\n",my_ntoa(new_ip));
|
|
source_ip_uint32=new_ip;
|
|
send_info.src_ip=new_ip;
|
|
}
|
|
}
|
|
|
|
if (source_port == 0)
|
|
{
|
|
send_info.src_port = client_bind_to_a_new_port();
|
|
}
|
|
else
|
|
{
|
|
send_info.src_port = source_port;
|
|
}
|
|
|
|
if (raw_mode == mode_icmp)
|
|
{
|
|
send_info.dst_port = send_info.src_port;
|
|
}
|
|
|
|
mylog(log_info, "using port %d\n", send_info.src_port);
|
|
init_filter(send_info.src_port);
|
|
|
|
if(raw_mode==mode_icmp||raw_mode==mode_udp)
|
|
{
|
|
conn_info.state.client_current_state=client_handshake1;
|
|
|
|
mylog(log_info,"state changed from client_idle to client_pre_handshake\n");
|
|
}
|
|
if(raw_mode==mode_faketcp)
|
|
{
|
|
conn_info.state.client_current_state=client_tcp_handshake;
|
|
mylog(log_info,"state changed from client_idle to client_tcp_handshake\n");
|
|
|
|
}
|
|
conn_info.last_state_time=get_current_time();
|
|
conn_info.last_hb_sent_time=0;
|
|
//dont return;
|
|
}
|
|
if(conn_info.state.client_current_state==client_tcp_handshake) //send and resend syn
|
|
{
|
|
assert(raw_mode==mode_faketcp);
|
|
if (get_current_time() - conn_info.last_state_time > client_handshake_timeout)
|
|
{
|
|
conn_info.state.client_current_state = client_idle;
|
|
mylog(log_info, "state back to client_idle from client_tcp_handshake\n");
|
|
return 0;
|
|
|
|
}
|
|
else if (get_current_time() - conn_info.last_hb_sent_time > client_retry_interval)
|
|
{
|
|
|
|
if (raw_mode == mode_faketcp)
|
|
{
|
|
if (conn_info.last_hb_sent_time == 0)
|
|
{
|
|
send_info.psh = 0;
|
|
send_info.syn = 1;
|
|
send_info.ack = 0;
|
|
send_info.ts_ack =0;
|
|
send_info.seq=get_true_random_number();
|
|
send_info.ack_seq=get_true_random_number();
|
|
}
|
|
}
|
|
|
|
send_raw0(raw_info, 0, 0);
|
|
|
|
conn_info.last_hb_sent_time = get_current_time();
|
|
mylog(log_info, "(re)sent tcp syn\n");
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
else if(conn_info.state.client_current_state==client_handshake1)//send and resend handshake1
|
|
{
|
|
if(get_current_time()-conn_info.last_state_time>client_handshake_timeout)
|
|
{
|
|
conn_info.state.client_current_state=client_idle;
|
|
mylog(log_info,"state back to client_idle from client_handshake1\n");
|
|
return 0;
|
|
|
|
}
|
|
else if(get_current_time()-conn_info.last_hb_sent_time>client_retry_interval)
|
|
{
|
|
|
|
if(raw_mode==mode_faketcp)
|
|
{
|
|
if(conn_info.last_hb_sent_time==0)
|
|
{
|
|
send_info.seq++;
|
|
send_info.ack_seq=recv_info.seq+1;
|
|
send_info.ts_ack=recv_info.ts;
|
|
raw_info.reserved_seq=send_info.seq;
|
|
}
|
|
send_info.seq=raw_info.reserved_seq;
|
|
send_info.psh = 0;
|
|
send_info.syn = 0;
|
|
send_info.ack = 1;
|
|
send_raw0(raw_info, 0, 0);
|
|
|
|
send_handshake(raw_info,conn_info.my_id,0,const_id);
|
|
|
|
send_info.seq+=raw_info.last_send_len;
|
|
}
|
|
else
|
|
{
|
|
|
|
send_handshake(raw_info,conn_info.my_id,0,const_id);
|
|
if(raw_mode==mode_icmp)
|
|
send_info.icmp_seq++;
|
|
}
|
|
|
|
conn_info.last_hb_sent_time=get_current_time();
|
|
mylog(log_info,"(re)sent handshake1\n");
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
else if(conn_info.state.client_current_state==client_handshake2)
|
|
{
|
|
if(get_current_time()-conn_info.last_state_time>client_handshake_timeout)
|
|
{
|
|
conn_info.state.client_current_state=client_idle;
|
|
mylog(log_info,"state back to client_idle from client_handshake2\n");
|
|
return 0;
|
|
}
|
|
else if(get_current_time()-conn_info.last_hb_sent_time>client_retry_interval)
|
|
{
|
|
if(raw_mode==mode_faketcp)
|
|
{
|
|
if(conn_info.last_hb_sent_time==0)
|
|
{
|
|
send_info.ack_seq=recv_info.seq+raw_info.last_recv_len;
|
|
send_info.ts_ack=recv_info.ts;
|
|
raw_info.reserved_seq=send_info.seq;
|
|
}
|
|
send_info.seq=raw_info.reserved_seq;
|
|
send_handshake(raw_info,conn_info.my_id,conn_info.oppsite_id,const_id);
|
|
send_info.seq+=raw_info.last_send_len;
|
|
|
|
}
|
|
else
|
|
{
|
|
|
|
send_handshake(raw_info,conn_info.my_id,conn_info.oppsite_id,const_id);
|
|
if(raw_mode==mode_icmp)
|
|
send_info.icmp_seq++;
|
|
}
|
|
conn_info.last_hb_sent_time=get_current_time();
|
|
mylog(log_info,"(re)sent handshake2\n");
|
|
return 0;
|
|
|
|
}
|
|
else
|
|
{
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
else if(conn_info.state.client_current_state==client_ready)
|
|
{
|
|
fail_time_counter=0;
|
|
mylog(log_trace,"time %llu,%llu\n",get_current_time(),conn_info.last_state_time);
|
|
|
|
if(get_current_time()-conn_info.last_hb_recv_time>client_conn_timeout)
|
|
{
|
|
conn_info.state.client_current_state=client_idle;
|
|
conn_info.my_id=get_true_random_number_nz();
|
|
mylog(log_info,"state back to client_idle from client_ready bc of server-->client direction timeout\n");
|
|
return 0;
|
|
}
|
|
|
|
if(get_current_time()-conn_info.last_hb_sent_time<heartbeat_interval)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
if(get_current_time()- conn_info.last_oppsite_roller_time>client_conn_uplink_timeout)
|
|
{
|
|
conn_info.state.client_current_state=client_idle;
|
|
conn_info.my_id=get_true_random_number_nz();
|
|
mylog(log_info,"state back to client_idle from client_ready bc of client-->server direction timeout\n");
|
|
}
|
|
|
|
mylog(log_debug,"heartbeat sent <%x,%x>\n",conn_info.oppsite_id,conn_info.my_id);
|
|
|
|
send_safer(conn_info,'h',"",0);/////////////send
|
|
|
|
conn_info.last_hb_sent_time=get_current_time();
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
mylog(log_fatal,"unknown state,this shouldnt happen.\n");
|
|
myexit(-1);
|
|
}
|
|
return 0;
|
|
}
|
|
int server_on_timer_multi(conn_info_t &conn_info,char * ip_port) //for server. called when a timer is ready in epoll.for server,there will be one timer for every connection
|
|
|
|
{
|
|
//keep_iptables_rule();
|
|
mylog(log_trace,"server timer!\n");
|
|
raw_info_t &raw_info=conn_info.raw_info;
|
|
|
|
assert(conn_info.state.server_current_state==server_ready);
|
|
|
|
|
|
if(conn_info.state.server_current_state==server_ready)
|
|
{
|
|
conn_info.blob->conv_manager.clear_inactive(ip_port);
|
|
/*
|
|
if( get_current_time()-conn_info.last_hb_recv_time>heartbeat_timeout )
|
|
{
|
|
mylog(log_trace,"%lld %lld\n",get_current_time(),conn_info.last_state_time);
|
|
conn_info.server_current_state=server_nothing;
|
|
|
|
//conn_manager.current_ready_ip=0;
|
|
//conn_manager.current_ready_port=0;
|
|
|
|
mylog(log_info,"changed state to server_nothing\n");
|
|
return 0;
|
|
}*/ //dont need to do this at server,conn_manger will clear expired connections
|
|
|
|
if(get_current_time()-conn_info.last_hb_sent_time<heartbeat_interval)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
send_safer(conn_info,'h',"",0); /////////////send
|
|
|
|
conn_info.last_hb_sent_time=get_current_time();
|
|
|
|
mylog(log_debug,"heart beat sent<%x,%x>\n",conn_info.my_id,conn_info.oppsite_id);
|
|
}
|
|
else
|
|
{
|
|
mylog(log_fatal,"this shouldnt happen!\n");
|
|
myexit(-1);
|
|
}
|
|
return 0;
|
|
|
|
}
|
|
int client_on_raw_recv(conn_info_t &conn_info) //called when raw fd received a packet.
|
|
{
|
|
char* data;int data_len;
|
|
packet_info_t &send_info=conn_info.raw_info.send_info;
|
|
packet_info_t &recv_info=conn_info.raw_info.recv_info;
|
|
|
|
raw_info_t &raw_info=conn_info.raw_info;
|
|
|
|
mylog(log_trace,"<client_on_raw_recv,send_info.ts_ack= %u>\n",send_info.ts_ack);
|
|
|
|
if(conn_info.state.client_current_state==client_idle )
|
|
{
|
|
recv(raw_recv_fd, 0,0, 0 );
|
|
}
|
|
else if(conn_info.state.client_current_state==client_tcp_handshake)//received syn ack
|
|
{
|
|
assert(raw_mode==mode_faketcp);
|
|
if(recv_raw0(raw_info,data,data_len)<0)
|
|
{
|
|
return -1;
|
|
}
|
|
if(recv_info.src_ip!=send_info.dst_ip||recv_info.src_port!=send_info.dst_port)
|
|
{
|
|
mylog(log_debug,"unexpected adress %x %x %d %d\n",recv_info.src_ip,send_info.dst_ip,recv_info.src_port,send_info.dst_port);
|
|
return -1;
|
|
}
|
|
if(data_len==0&&raw_info.recv_info.syn==1&&raw_info.recv_info.ack==1)
|
|
{
|
|
if(recv_info.ack_seq!=send_info.seq+1)
|
|
{
|
|
mylog(log_debug,"seq ack_seq mis match\n");
|
|
return -1;
|
|
}
|
|
|
|
conn_info.state.client_current_state = client_handshake1;
|
|
mylog(log_info,"state changed from client_tcp_handshake to client_handshake1\n");
|
|
conn_info.last_state_time = get_current_time();
|
|
conn_info.last_hb_sent_time=0;
|
|
client_on_timer(conn_info);
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
mylog(log_debug,"unexpected packet type,expected:syn ack\n");
|
|
return -1;
|
|
}
|
|
}
|
|
else if(conn_info.state.client_current_state==client_handshake1)//recevied respond of handshake1
|
|
{
|
|
if(recv_bare(raw_info,data,data_len)!=0)
|
|
{
|
|
mylog(log_debug,"recv_bare failed!\n");
|
|
return -1;
|
|
}
|
|
if(recv_info.src_ip!=send_info.dst_ip||recv_info.src_port!=send_info.dst_port)
|
|
{
|
|
mylog(log_debug,"unexpected adress %x %x %d %d\n",recv_info.src_ip,send_info.dst_ip,recv_info.src_port,send_info.dst_port);
|
|
return -1;
|
|
}
|
|
if(data_len<int( 3*sizeof(id_t)))
|
|
{
|
|
mylog(log_debug,"too short to be a handshake\n");
|
|
return -1;
|
|
}
|
|
//id_t tmp_oppsite_id= ntohl(* ((u32_t *)&data[0]));
|
|
id_t tmp_oppsite_id;
|
|
memcpy(&tmp_oppsite_id,&data[0],sizeof(tmp_oppsite_id));
|
|
tmp_oppsite_id=ntohl(tmp_oppsite_id);
|
|
|
|
//id_t tmp_my_id=ntohl(* ((u32_t *)&data[sizeof(id_t)]));
|
|
id_t tmp_my_id;
|
|
memcpy(&tmp_my_id,&data[sizeof(id_t)],sizeof(tmp_my_id));
|
|
tmp_my_id=ntohl(tmp_my_id);
|
|
|
|
//id_t tmp_oppsite_const_id=ntohl(* ((u32_t *)&data[sizeof(id_t)*2]));
|
|
id_t tmp_oppsite_const_id;
|
|
memcpy(&tmp_oppsite_const_id,&data[sizeof(id_t)*2],sizeof(tmp_oppsite_const_id));
|
|
tmp_oppsite_const_id=ntohl(tmp_oppsite_const_id);
|
|
|
|
if(tmp_my_id!=conn_info.my_id)
|
|
{
|
|
mylog(log_debug,"tmp_my_id doesnt match\n");
|
|
return -1;
|
|
}
|
|
|
|
|
|
if(raw_mode==mode_faketcp)
|
|
{
|
|
if(recv_info.ack_seq!=send_info.seq)
|
|
{
|
|
mylog(log_debug,"seq ack_seq mis match\n");
|
|
return -1;
|
|
}
|
|
if(recv_info.seq!=send_info.ack_seq)
|
|
{
|
|
mylog(log_debug,"seq ack_seq mis match\n");
|
|
return -1;
|
|
}
|
|
}
|
|
conn_info.oppsite_id=tmp_oppsite_id;
|
|
|
|
mylog(log_info,"changed state from to client_handshake1 to client_handshake2,my_id is %x,oppsite id is %x\n",conn_info.my_id,conn_info.oppsite_id);
|
|
|
|
//send_handshake(raw_info,conn_info.my_id,conn_info.oppsite_id,const_id); //////////////send
|
|
conn_info.state.client_current_state = client_handshake2;
|
|
conn_info.last_state_time = get_current_time();
|
|
conn_info.last_hb_sent_time=0;
|
|
client_on_timer(conn_info);
|
|
|
|
return 0;
|
|
}
|
|
else if(conn_info.state.client_current_state==client_handshake2||conn_info.state.client_current_state==client_ready)//received heartbeat or data
|
|
{
|
|
char type;
|
|
if(recv_safer(conn_info,type,data,data_len)!=0)
|
|
{
|
|
mylog(log_debug,"recv_safer failed!\n");
|
|
return -1;
|
|
}
|
|
if(recv_info.src_ip!=send_info.dst_ip||recv_info.src_port!=send_info.dst_port)
|
|
{
|
|
mylog(log_warn,"unexpected adress %x %x %d %d,this shouldnt happen.\n",recv_info.src_ip,send_info.dst_ip,recv_info.src_port,send_info.dst_port);
|
|
return -1;
|
|
}
|
|
if(conn_info.state.client_current_state==client_handshake2)
|
|
{
|
|
mylog(log_info,"changed state from to client_handshake2 to client_ready\n");
|
|
conn_info.state.client_current_state=client_ready;
|
|
conn_info.last_hb_sent_time=0;
|
|
conn_info.last_hb_recv_time=get_current_time();
|
|
conn_info.last_oppsite_roller_time=conn_info.last_hb_recv_time;
|
|
client_on_timer(conn_info);
|
|
}
|
|
if(data_len==0&&type=='h')
|
|
{
|
|
mylog(log_debug,"[hb]heart beat received\n");
|
|
conn_info.last_hb_recv_time=get_current_time();
|
|
return 0;
|
|
}
|
|
else if(data_len>= int( sizeof(u32_t))&&type=='d')
|
|
{
|
|
mylog(log_trace,"received a data from fake tcp,len:%d\n",data_len);
|
|
|
|
conn_info.last_hb_recv_time=get_current_time();
|
|
|
|
//u32_t tmp_conv_id= ntohl(* ((u32_t *)&data[0]));
|
|
u32_t tmp_conv_id;
|
|
memcpy(&tmp_conv_id,&data[0],sizeof(tmp_conv_id));
|
|
tmp_conv_id=ntohl(tmp_conv_id);
|
|
|
|
if(!conn_info.blob->conv_manager.is_conv_used(tmp_conv_id))
|
|
{
|
|
mylog(log_info,"unknow conv %d,ignore\n",tmp_conv_id);
|
|
return 0;
|
|
}
|
|
|
|
conn_info.blob->conv_manager.update_active_time(tmp_conv_id);
|
|
|
|
u64_t u64=conn_info.blob->conv_manager.find_u64_by_conv(tmp_conv_id);
|
|
|
|
|
|
sockaddr_in tmp_sockaddr={0};
|
|
|
|
tmp_sockaddr.sin_family = AF_INET;
|
|
tmp_sockaddr.sin_addr.s_addr=(u64>>32u);
|
|
|
|
tmp_sockaddr.sin_port= htons(uint16_t((u64<<32u)>>32u));
|
|
|
|
|
|
int ret=sendto(udp_fd,data+sizeof(u32_t),data_len -(sizeof(u32_t)),0,(struct sockaddr *)&tmp_sockaddr,sizeof(tmp_sockaddr));
|
|
|
|
if(ret<0)
|
|
{
|
|
mylog(log_warn,"sento returned %d\n",ret);
|
|
//perror("ret<0");
|
|
}
|
|
mylog(log_trace,"%s :%d\n",inet_ntoa(tmp_sockaddr.sin_addr),ntohs(tmp_sockaddr.sin_port));
|
|
mylog(log_trace,"%d byte sent\n",ret);
|
|
}
|
|
else
|
|
{
|
|
mylog(log_warn,"unknown packet,this shouldnt happen.\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
mylog(log_fatal,"unknown state,this shouldnt happen.\n");
|
|
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;
|
|
}
|
|
int server_on_raw_recv_multi() //called when server received an raw packet
|
|
{
|
|
char dummy_buf[buf_len];
|
|
packet_info_t peek_info;
|
|
if(peek_raw(peek_info)<0)
|
|
{
|
|
recv(raw_recv_fd, 0,0, 0 );//
|
|
//struct sockaddr saddr;
|
|
//socklen_t saddr_size=sizeof(saddr);
|
|
///recvfrom(raw_recv_fd, 0,0, 0 ,&saddr , &saddr_size);//
|
|
mylog(log_trace,"peek_raw failed\n");
|
|
return -1;
|
|
}else
|
|
{
|
|
mylog(log_trace,"peek_raw success\n");
|
|
}
|
|
u32_t ip=peek_info.src_ip;uint16_t port=peek_info.src_port;
|
|
|
|
char ip_port[40];
|
|
sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
|
|
mylog(log_trace,"[%s]peek_raw\n",ip_port);
|
|
int data_len; char *data;
|
|
|
|
if(raw_mode==mode_faketcp&&peek_info.syn==1)
|
|
{
|
|
if(!conn_manager.exist(ip,port)||conn_manager.find_insert(ip,port).state.server_current_state!=server_ready)
|
|
{//reply any syn ,before state become ready
|
|
|
|
raw_info_t tmp_raw_info;
|
|
if(recv_raw0(tmp_raw_info,data,data_len)<0)
|
|
{
|
|
return 0;
|
|
}
|
|
raw_info_t &raw_info=tmp_raw_info;
|
|
packet_info_t &send_info=raw_info.send_info;
|
|
packet_info_t &recv_info=raw_info.recv_info;
|
|
|
|
send_info.src_ip=recv_info.dst_ip;
|
|
send_info.src_port=recv_info.dst_port;
|
|
|
|
send_info.dst_port = recv_info.src_port;
|
|
send_info.dst_ip = recv_info.src_ip;
|
|
|
|
if(lower_level)
|
|
{
|
|
handle_lower_level(raw_info);
|
|
}
|
|
|
|
if(data_len==0&&raw_info.recv_info.syn==1&&raw_info.recv_info.ack==0)
|
|
{
|
|
send_info.ack_seq = recv_info.seq + 1;
|
|
|
|
send_info.psh = 0;
|
|
send_info.syn = 1;
|
|
send_info.ack = 1;
|
|
send_info.ts_ack=recv_info.ts;
|
|
|
|
mylog(log_info,"[%s]received syn,sent syn ack back\n",ip_port);
|
|
send_raw0(raw_info, 0, 0);
|
|
return 0;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
if(!conn_manager.exist(ip,port))
|
|
{
|
|
if(conn_manager.mp.size()>=max_handshake_conn_num)
|
|
{
|
|
mylog(log_info,"[%s]reached max_handshake_conn_num,ignored new handshake\n",ip_port);
|
|
recv(raw_recv_fd, 0,0, 0 );//
|
|
return 0;
|
|
}
|
|
|
|
raw_info_t tmp_raw_info;
|
|
|
|
|
|
if(raw_mode==mode_icmp)
|
|
{
|
|
tmp_raw_info.send_info.dst_port=tmp_raw_info.send_info.src_port=port;
|
|
}
|
|
if(recv_bare(tmp_raw_info,data,data_len)<0)
|
|
{
|
|
return 0;
|
|
}
|
|
if(data_len<int( 3*sizeof(id_t)))
|
|
{
|
|
mylog(log_debug,"[%s]too short to be a handshake\n",ip_port);
|
|
return -1;
|
|
}
|
|
|
|
//id_t zero=ntohl(* ((u32_t *)&data[sizeof(id_t)]));
|
|
id_t zero;
|
|
memcpy(&zero,&data[sizeof(id_t)],sizeof(zero));
|
|
zero=ntohl(zero);
|
|
|
|
if(zero!=0)
|
|
{
|
|
mylog(log_debug,"[%s]not a invalid initial handshake\n",ip_port);
|
|
return -1;
|
|
}
|
|
|
|
mylog(log_info,"[%s]got packet from a new ip\n",ip_port);
|
|
|
|
conn_info_t &conn_info=conn_manager.find_insert(ip,port);
|
|
conn_info.raw_info=tmp_raw_info;
|
|
|
|
packet_info_t &send_info=conn_info.raw_info.send_info;
|
|
packet_info_t &recv_info=conn_info.raw_info.recv_info;
|
|
raw_info_t &raw_info=conn_info.raw_info;
|
|
|
|
send_info.src_ip=recv_info.dst_ip;
|
|
send_info.src_port=recv_info.dst_port;
|
|
|
|
send_info.dst_port = recv_info.src_port;
|
|
send_info.dst_ip = recv_info.src_ip;
|
|
|
|
if(lower_level)
|
|
{
|
|
handle_lower_level(raw_info);
|
|
}
|
|
|
|
//id_t tmp_oppsite_id= ntohl(* ((u32_t *)&data[0]));
|
|
//mylog(log_info,"[%s]handshake1 received %x\n",ip_port,tmp_oppsite_id);
|
|
|
|
conn_info.my_id=get_true_random_number_nz();
|
|
|
|
|
|
mylog(log_info,"[%s]created new conn,state: server_handshake1,my_id is %x\n",ip_port,conn_info.my_id);
|
|
|
|
conn_info.state.server_current_state = server_handshake1;
|
|
conn_info.last_state_time = get_current_time();
|
|
|
|
server_on_raw_recv_handshake1(conn_info,ip_port,data,data_len);
|
|
return 0;
|
|
}
|
|
|
|
|
|
conn_info_t & conn_info=conn_manager.find_insert(ip,port);//insert if not exist
|
|
packet_info_t &send_info=conn_info.raw_info.send_info;
|
|
packet_info_t &recv_info=conn_info.raw_info.recv_info;
|
|
raw_info_t &raw_info=conn_info.raw_info;
|
|
|
|
if(conn_info.state.server_current_state==server_handshake1)
|
|
{
|
|
if(recv_bare(raw_info,data,data_len)!=0)
|
|
{
|
|
return -1;
|
|
}
|
|
server_on_raw_recv_handshake1(conn_info,ip_port,data,data_len);
|
|
}
|
|
if(conn_info.state.server_current_state==server_ready)
|
|
{
|
|
char type;
|
|
//mylog(log_info,"before recv_safer\n");
|
|
if (recv_safer(conn_info,type, data, data_len) != 0) {
|
|
return -1;
|
|
}
|
|
//mylog(log_info,"after recv_safer\n");
|
|
return server_on_raw_recv_ready(conn_info,ip_port,type,data,data_len);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
int server_on_raw_recv_handshake1(conn_info_t &conn_info,id_t tmp_oppsite_id )
|
|
{
|
|
packet_info_t &send_info=conn_info.raw_info.send_info;
|
|
packet_info_t &recv_info=conn_info.raw_info.recv_info;
|
|
raw_info_t &raw_info=conn_info.raw_info;
|
|
|
|
|
|
|
|
return 0;
|
|
}*/
|
|
int server_on_raw_recv_handshake1(conn_info_t &conn_info,char * ip_port,char * data, int data_len)//called when server received a handshake1 packet from client
|
|
{
|
|
packet_info_t &send_info=conn_info.raw_info.send_info;
|
|
packet_info_t &recv_info=conn_info.raw_info.recv_info;
|
|
raw_info_t &raw_info=conn_info.raw_info;
|
|
|
|
//u32_t ip=conn_info.raw_info.recv_info.src_ip;
|
|
//uint16_t port=conn_info.raw_info.recv_info.src_port;
|
|
|
|
//char ip_port[40];
|
|
//sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
|
|
|
|
if(data_len<int( 3*sizeof(id_t)))
|
|
{
|
|
mylog(log_debug,"[%s] data_len=%d too short to be a handshake\n",ip_port,data_len);
|
|
return -1;
|
|
}
|
|
//id_t tmp_oppsite_id= ntohl(* ((u32_t *)&data[0]));
|
|
id_t tmp_oppsite_id;
|
|
memcpy(&tmp_oppsite_id,(u32_t *)&data[0],sizeof(tmp_oppsite_id));
|
|
tmp_oppsite_id=ntohl(tmp_oppsite_id);
|
|
|
|
//id_t tmp_my_id=ntohl(* ((u32_t *)&data[sizeof(id_t)]));
|
|
id_t tmp_my_id;
|
|
memcpy(&tmp_my_id,&data[sizeof(id_t)],sizeof(tmp_my_id));
|
|
tmp_my_id=ntohl(tmp_my_id);
|
|
|
|
if(tmp_my_id==0) //received init handshake again
|
|
{
|
|
if(raw_mode==mode_faketcp)
|
|
{
|
|
send_info.seq=recv_info.ack_seq;
|
|
send_info.ack_seq=recv_info.seq+raw_info.last_recv_len;
|
|
send_info.ts_ack=recv_info.ts;
|
|
}
|
|
if(raw_mode==mode_icmp)
|
|
{
|
|
send_info.icmp_seq=recv_info.icmp_seq;
|
|
}
|
|
send_handshake(raw_info,conn_info.my_id,tmp_oppsite_id,const_id); //////////////send
|
|
|
|
mylog(log_info,"[%s]changed state to server_handshake1,my_id is %x\n",ip_port,conn_info.my_id);
|
|
}
|
|
else if(tmp_my_id==conn_info.my_id)
|
|
{
|
|
conn_info.oppsite_id=tmp_oppsite_id;
|
|
//id_t tmp_oppsite_const_id=ntohl(* ((u32_t *)&data[sizeof(id_t)*2]));
|
|
|
|
id_t tmp_oppsite_const_id;
|
|
memcpy(&tmp_oppsite_const_id,&data[sizeof(id_t)*2],sizeof(tmp_oppsite_const_id));
|
|
tmp_oppsite_const_id=ntohl(tmp_oppsite_const_id);
|
|
|
|
|
|
if(raw_mode==mode_faketcp)
|
|
{
|
|
send_info.seq=recv_info.ack_seq;
|
|
send_info.ack_seq=recv_info.seq+raw_info.last_recv_len;
|
|
send_info.ts_ack=recv_info.ts;
|
|
}
|
|
|
|
if(raw_mode==mode_icmp)
|
|
{
|
|
send_info.icmp_seq=recv_info.icmp_seq;
|
|
}
|
|
|
|
server_on_raw_recv_pre_ready(conn_info,ip_port,tmp_oppsite_const_id);
|
|
|
|
}
|
|
else
|
|
{
|
|
mylog(log_debug,"[%s]invalid my_id %x,my_id is %x\n",ip_port,tmp_my_id,conn_info.my_id);
|
|
}
|
|
return 0;
|
|
}
|
|
int server_on_raw_recv_ready(conn_info_t &conn_info,char * ip_port,char type,char *data,int data_len) //called while the state for a connection is server_ready
|
|
//receives data and heart beat by recv_safer.
|
|
{
|
|
|
|
raw_info_t &raw_info = conn_info.raw_info;
|
|
packet_info_t &send_info = conn_info.raw_info.send_info;
|
|
packet_info_t &recv_info = conn_info.raw_info.recv_info;
|
|
//char ip_port[40];
|
|
|
|
//sprintf(ip_port,"%s:%d",my_ntoa(recv_info.src_ip),recv_info.src_port);
|
|
|
|
|
|
/*
|
|
if (recv_info.src_ip != send_info.dst_ip
|
|
|| recv_info.src_port != send_info.dst_port) {
|
|
mylog(log_debug, "unexpected adress\n");
|
|
return 0;
|
|
}*/
|
|
|
|
if (type == 'h' && data_len == 0) {
|
|
//u32_t tmp = ntohl(*((u32_t *) &data[sizeof(u32_t)]));
|
|
mylog(log_debug,"[%s][hb]received hb \n",ip_port);
|
|
conn_info.last_hb_recv_time = get_current_time();
|
|
return 0;
|
|
} else if (type== 'd' && data_len >=int( sizeof(u32_t) ))
|
|
{
|
|
|
|
//u32_t tmp_conv_id = ntohl(*((u32_t *) &data[0]));
|
|
id_t tmp_conv_id;
|
|
memcpy(&tmp_conv_id,&data[0],sizeof(tmp_conv_id));
|
|
tmp_conv_id=ntohl(tmp_conv_id);
|
|
|
|
|
|
conn_info.last_hb_recv_time = get_current_time();
|
|
|
|
mylog(log_trace, "conv:%u\n", tmp_conv_id);
|
|
if (!conn_info.blob->conv_manager.is_conv_used(tmp_conv_id)) {
|
|
if (conn_info.blob->conv_manager.get_size() >= max_conv_num) {
|
|
mylog(log_warn,
|
|
"[%s]ignored new conv %x connect bc max_conv_num exceed\n",ip_port,
|
|
tmp_conv_id);
|
|
return 0;
|
|
}
|
|
struct sockaddr_in remote_addr_in={0};
|
|
|
|
socklen_t slen = sizeof(sockaddr_in);
|
|
//memset(&remote_addr_in, 0, sizeof(remote_addr_in));
|
|
remote_addr_in.sin_family = AF_INET;
|
|
remote_addr_in.sin_port = htons(remote_port);
|
|
remote_addr_in.sin_addr.s_addr = remote_ip_uint32;
|
|
|
|
int new_udp_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
|
|
if (new_udp_fd < 0) {
|
|
mylog(log_warn, "[%s]create udp_fd error\n",ip_port);
|
|
return -1;
|
|
}
|
|
setnonblocking(new_udp_fd);
|
|
set_buf_size(new_udp_fd);
|
|
|
|
mylog(log_debug, "[%s]created new udp_fd %d\n",ip_port, new_udp_fd);
|
|
int ret = connect(new_udp_fd, (struct sockaddr *) &remote_addr_in,
|
|
slen);
|
|
if (ret != 0) {
|
|
mylog(log_warn, "udp fd connect fail\n");
|
|
close(new_udp_fd);
|
|
return -1;
|
|
}
|
|
struct epoll_event ev;
|
|
|
|
u64_t u64 = (u32_t(new_udp_fd))+(1llu<<32u);
|
|
mylog(log_trace, "[%s]u64: %lld\n",ip_port, u64);
|
|
ev.events = EPOLLIN;
|
|
|
|
ev.data.u64 = u64;
|
|
|
|
ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, new_udp_fd, &ev);
|
|
|
|
if (ret != 0) {
|
|
mylog(log_warn, "[%s]add udp_fd error\n",ip_port);
|
|
close(new_udp_fd);
|
|
return -1;
|
|
}
|
|
|
|
conn_info.blob->conv_manager.insert_conv(tmp_conv_id, new_udp_fd);
|
|
assert(conn_manager.udp_fd_mp.find(new_udp_fd)==conn_manager.udp_fd_mp.end());
|
|
|
|
conn_manager.udp_fd_mp[new_udp_fd] = &conn_info;
|
|
|
|
//pack_u64(conn_info.raw_info.recv_info.src_ip,conn_info.raw_info.recv_info.src_port);
|
|
|
|
mylog(log_info, "[%s]new conv conv_id=%x, assigned fd=%d\n",ip_port,
|
|
tmp_conv_id, new_udp_fd);
|
|
|
|
|
|
|
|
}
|
|
|
|
u64_t u64 = conn_info.blob->conv_manager.find_u64_by_conv(tmp_conv_id);
|
|
|
|
conn_info.blob->conv_manager.update_active_time(tmp_conv_id);
|
|
|
|
int fd = int((u64 << 32u) >> 32u);
|
|
|
|
mylog(log_trace, "[%s]received a data from fake tcp,len:%d\n",ip_port, data_len);
|
|
int ret = send(fd, data + sizeof(u32_t),
|
|
data_len - ( sizeof(u32_t)), 0);
|
|
|
|
mylog(log_trace, "[%s]%d byte sent ,fd :%d\n ",ip_port, ret, fd);
|
|
if (ret < 0) {
|
|
mylog(log_warn, "send returned %d\n", ret);
|
|
//perror("what happened????");
|
|
}
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int server_on_raw_recv_pre_ready(conn_info_t &conn_info,char * ip_port,u32_t tmp_oppsite_const_id)// do prepare work before state change to server ready for a specifc connection
|
|
//connection recovery is also handle here
|
|
{
|
|
//u32_t ip;uint16_t port;
|
|
//ip=conn_info.raw_info.recv_info.src_ip;
|
|
//port=conn_info.raw_info.recv_info.src_port;
|
|
//char ip_port[40];
|
|
//sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
|
|
|
|
mylog(log_info,"[%s]received handshake oppsite_id:%x my_id:%x\n",ip_port,conn_info.oppsite_id,conn_info.my_id);
|
|
|
|
mylog(log_info,"[%s]oppsite const_id:%x \n",ip_port,tmp_oppsite_const_id);
|
|
if(conn_manager.const_id_mp.find(tmp_oppsite_const_id)==conn_manager.const_id_mp.end())
|
|
{
|
|
//conn_manager.const_id_mp=
|
|
|
|
if(conn_manager.ready_num>=max_ready_conn_num)
|
|
{
|
|
mylog(log_info,"[%s]max_ready_conn_num,cant turn to ready\n",ip_port);
|
|
conn_info.state.server_current_state =server_idle;
|
|
return 0;
|
|
}
|
|
|
|
conn_info.prepare();
|
|
conn_info.state.server_current_state = server_ready;
|
|
conn_info.oppsite_const_id=tmp_oppsite_const_id;
|
|
conn_manager.ready_num++;
|
|
conn_manager.const_id_mp[tmp_oppsite_const_id]=&conn_info;
|
|
|
|
|
|
//conn_info.last_state_time=get_current_time(); //dont change this!!!!!!!!!!!!!!!!!!!!!!!!!
|
|
|
|
//conn_manager.current_ready_ip=ip;
|
|
//conn_manager.current_ready_port=port;
|
|
|
|
//my_id=conn_info.my_id;
|
|
//oppsite_id=conn_info.oppsite_id;
|
|
|
|
conn_info.last_hb_recv_time = get_current_time();
|
|
conn_info.last_hb_sent_time = conn_info.last_hb_recv_time;//=get_current_time()
|
|
|
|
send_safer(conn_info, 'h',"", 0); /////////////send
|
|
|
|
mylog(log_info, "[%s]changed state to server_ready\n",ip_port);
|
|
conn_info.blob->anti_replay.re_init();
|
|
|
|
//g_conn_info=conn_info;
|
|
int new_timer_fd;
|
|
set_timer_server(epollfd, new_timer_fd);
|
|
conn_info.timer_fd=new_timer_fd;
|
|
assert(conn_manager.timer_fd_mp.find(new_timer_fd)==conn_manager.timer_fd_mp.end());
|
|
conn_manager.timer_fd_mp[new_timer_fd] = &conn_info;//pack_u64(ip,port);
|
|
|
|
|
|
//timer_fd_mp[new_timer_fd]
|
|
/*
|
|
if(oppsite_const_id!=0&&tmp_oppsite_const_id!=oppsite_const_id) //TODO MOVE TO READY
|
|
{
|
|
mylog(log_info,"cleared all conv bc of const id doesnt match\n");
|
|
conv_manager.clear();
|
|
}*/
|
|
//oppsite_const_id=tmp_oppsite_const_id;
|
|
}
|
|
else
|
|
{
|
|
|
|
conn_info_t &ori_conn_info=*conn_manager.const_id_mp[tmp_oppsite_const_id];
|
|
|
|
if(ori_conn_info.state.server_current_state==server_ready)
|
|
{
|
|
if(conn_info.last_state_time<ori_conn_info.last_state_time)
|
|
{
|
|
mylog(log_info,"[%s]conn_info.last_state_time<ori_conn_info.last_state_time. ignored new handshake\n",ip_port);
|
|
conn_info.state.server_current_state=server_idle;
|
|
conn_info.oppsite_const_id=0;
|
|
return 0;
|
|
}
|
|
if(!conn_manager.exist(ori_conn_info.raw_info.recv_info.src_ip,ori_conn_info.raw_info.recv_info.src_port))//TODO remove this
|
|
{
|
|
mylog(log_fatal,"[%s]this shouldnt happen\n",ip_port);
|
|
myexit(-1);
|
|
}
|
|
if(!conn_manager.exist(conn_info.raw_info.recv_info.src_ip,conn_info.raw_info.recv_info.src_port))//TODO remove this
|
|
{
|
|
mylog(log_fatal,"[%s]this shouldnt happen2\n",ip_port);
|
|
myexit(-1);
|
|
}
|
|
conn_info_t *&p_ori=conn_manager.find_insert_p(ori_conn_info.raw_info.recv_info.src_ip,ori_conn_info.raw_info.recv_info.src_port);
|
|
conn_info_t *&p=conn_manager.find_insert_p(conn_info.raw_info.recv_info.src_ip,conn_info.raw_info.recv_info.src_port);
|
|
conn_info_t *tmp=p;
|
|
p=p_ori;
|
|
p_ori=tmp;
|
|
|
|
|
|
mylog(log_info,"[%s]grabbed a connection\n",ip_port);
|
|
|
|
|
|
//ori_conn_info.state.server_current_state=server_ready;
|
|
ori_conn_info.recover(conn_info);
|
|
|
|
send_safer(ori_conn_info, 'h',"", 0);
|
|
//ori_conn_info.blob->anti_replay.re_init();
|
|
|
|
|
|
|
|
conn_info.state.server_current_state=server_idle;
|
|
conn_info.oppsite_const_id=0;
|
|
|
|
}
|
|
else
|
|
{
|
|
mylog(log_fatal,"[%s]this should never happen\n",ip_port);
|
|
myexit(-1);
|
|
}
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int get_src_adress(u32_t &ip) //a trick to get src adress for a dest adress,so that we can use the src address in raw socket as source ip
|
|
{
|
|
struct sockaddr_in remote_addr_in={0};
|
|
|
|
socklen_t slen = sizeof(sockaddr_in);
|
|
//memset(&remote_addr_in, 0, sizeof(remote_addr_in));
|
|
remote_addr_in.sin_family = AF_INET;
|
|
remote_addr_in.sin_port = htons(remote_port);
|
|
remote_addr_in.sin_addr.s_addr = remote_ip_uint32;
|
|
|
|
|
|
int new_udp_fd=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
|
|
if(new_udp_fd<0)
|
|
{
|
|
mylog(log_warn,"create udp_fd error\n");
|
|
return -1;
|
|
}
|
|
//set_buf_size(new_udp_fd);
|
|
|
|
mylog(log_debug,"created new udp_fd %d\n",new_udp_fd);
|
|
int ret = connect(new_udp_fd, (struct sockaddr *) &remote_addr_in, slen);
|
|
if(ret!=0)
|
|
{
|
|
mylog(log_warn,"udp fd connect fail\n");
|
|
close(new_udp_fd);
|
|
return -1;
|
|
}
|
|
|
|
struct sockaddr_in my_addr={0};
|
|
socklen_t len=sizeof(my_addr);
|
|
|
|
if(getsockname(new_udp_fd, (struct sockaddr *) &my_addr, &len)!=0) return -1;
|
|
|
|
ip=my_addr.sin_addr.s_addr;
|
|
|
|
close(new_udp_fd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int client_event_loop()
|
|
{
|
|
|
|
|
|
char buf[buf_len];
|
|
|
|
conn_info_t conn_info;
|
|
conn_info.my_id=get_true_random_number_nz();
|
|
|
|
conn_info.prepare();
|
|
packet_info_t &send_info=conn_info.raw_info.send_info;
|
|
packet_info_t &recv_info=conn_info.raw_info.recv_info;
|
|
|
|
|
|
if(lower_level)
|
|
{
|
|
if(lower_level_manual)
|
|
{
|
|
int index;
|
|
init_ifindex(if_name,index);
|
|
//init_ifindex(if_name);
|
|
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 =index;
|
|
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_info,"we are running at lower-level (manual) mode\n");
|
|
}
|
|
else
|
|
{
|
|
u32_t dest_ip;
|
|
string if_name_string;
|
|
string hw_string;
|
|
if(find_lower_level_info(remote_ip_uint32,dest_ip,if_name_string,hw_string)!=0)
|
|
{
|
|
mylog(log_fatal,"auto detect lower-level info failed for %s,specific it manually\n",remote_ip);
|
|
myexit(-1);
|
|
}
|
|
mylog(log_info,"we are running at lower-level (auto) mode,%s %s %s\n",my_ntoa(dest_ip),if_name_string.c_str(),hw_string.c_str());
|
|
|
|
u32_t hw[6];
|
|
memset(hw, 0, sizeof(hw));
|
|
sscanf(hw_string.c_str(), "%x:%x:%x:%x:%x:%x",&hw[0], &hw[1], &hw[2],
|
|
&hw[3], &hw[4], &hw[5]);
|
|
|
|
mylog(log_warn,
|
|
"make sure this is correct: if_name=<%s> dest_mac_adress=<%02x:%02x:%02x:%02x:%02x:%02x> \n",
|
|
if_name_string.c_str(), hw[0], hw[1], hw[2], hw[3], hw[4], hw[5]);
|
|
for (int i = 0; i < 6; i++) {
|
|
dest_hw_addr[i] = uint8_t(hw[i]);
|
|
}
|
|
|
|
//mylog(log_fatal,"--lower-level auto for client hasnt been implemented\n");
|
|
int index;
|
|
init_ifindex(if_name_string.c_str(),index);
|
|
|
|
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 = index;
|
|
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_info,"we are running at lower-level (manual) mode\n");
|
|
}
|
|
|
|
}
|
|
//printf("?????\n");
|
|
if(source_ip_uint32==0)
|
|
{
|
|
mylog(log_info,"get_src_adress called\n");
|
|
if(get_src_adress(source_ip_uint32)!=0)
|
|
{
|
|
mylog(log_fatal,"the trick to auto get source ip failed,you should specific an ip by --source-ip\n");
|
|
myexit(-1);
|
|
}
|
|
}
|
|
in_addr tmp;
|
|
tmp.s_addr=source_ip_uint32;
|
|
mylog(log_info,"source ip = %s\n",inet_ntoa(tmp));
|
|
//printf("done\n");
|
|
|
|
|
|
if(try_to_list_and_bind(source_port)!=0)
|
|
{
|
|
mylog(log_fatal,"bind to source_port:%d fail\n ",source_port);
|
|
myexit(-1);
|
|
}
|
|
send_info.src_port=source_port;
|
|
send_info.src_ip = source_ip_uint32;
|
|
|
|
int i, j, k;int ret;
|
|
|
|
|
|
//init_filter(source_port);
|
|
send_info.dst_ip=remote_ip_uint32;
|
|
send_info.dst_port=remote_port;
|
|
|
|
//g_packet_info.src_ip=source_address_uint32;
|
|
//g_packet_info.src_port=source_port;
|
|
|
|
udp_fd=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
|
|
set_buf_size(udp_fd);
|
|
|
|
int yes = 1;
|
|
//setsockopt(udp_fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes));
|
|
|
|
struct sockaddr_in local_me={0};
|
|
|
|
socklen_t slen = sizeof(sockaddr_in);
|
|
//memset(&local_me, 0, sizeof(local_me));
|
|
local_me.sin_family = AF_INET;
|
|
local_me.sin_port = htons(local_port);
|
|
local_me.sin_addr.s_addr = local_ip_uint32;
|
|
|
|
|
|
if (bind(udp_fd, (struct sockaddr*) &local_me, slen) == -1) {
|
|
mylog(log_fatal,"socket bind error\n");
|
|
//perror("socket bind error");
|
|
myexit(1);
|
|
}
|
|
setnonblocking(udp_fd);
|
|
epollfd = epoll_create1(0);
|
|
|
|
const int max_events = 4096;
|
|
struct epoll_event ev, events[max_events];
|
|
if (epollfd < 0) {
|
|
mylog(log_fatal,"epoll return %d\n", epollfd);
|
|
myexit(-1);
|
|
}
|
|
|
|
ev.events = EPOLLIN;
|
|
ev.data.u64 = udp_fd;
|
|
ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, udp_fd, &ev);
|
|
if (ret!=0) {
|
|
mylog(log_fatal,"add udp_listen_fd error\n");
|
|
myexit(-1);
|
|
}
|
|
ev.events = EPOLLIN;
|
|
ev.data.u64 = raw_recv_fd;
|
|
|
|
ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, raw_recv_fd, &ev);
|
|
if (ret!= 0) {
|
|
mylog(log_fatal,"add raw_fd error\n");
|
|
myexit(-1);
|
|
}
|
|
|
|
////add_timer for fake_tcp_keep_connection_client
|
|
|
|
//sleep(10);
|
|
|
|
//memset(&udp_old_addr_in,0,sizeof(sockaddr_in));
|
|
int unbind=1;
|
|
|
|
|
|
set_timer(epollfd,timer_fd);
|
|
|
|
mylog(log_debug,"send_raw : from %x %d to %x %d\n",send_info.src_ip,send_info.src_port,send_info.dst_ip,send_info.dst_port);
|
|
while(1)////////////////////////
|
|
{
|
|
if(about_to_exit) myexit(0);
|
|
epoll_trigger_counter++;
|
|
int nfds = epoll_wait(epollfd, events, max_events, 180 * 1000);
|
|
if (nfds < 0) { //allow zero
|
|
if(errno==EINTR )
|
|
{
|
|
mylog(log_info,"epoll interrupted by signal\n");
|
|
myexit(0);
|
|
}
|
|
else
|
|
{
|
|
mylog(log_fatal,"epoll_wait return %d\n", nfds);
|
|
myexit(-1);
|
|
}
|
|
}
|
|
int idx;
|
|
for (idx = 0; idx < nfds; ++idx) {
|
|
if (events[idx].data.u64 == (u64_t)raw_recv_fd)
|
|
{
|
|
iphdr *iph;tcphdr *tcph;
|
|
client_on_raw_recv(conn_info);
|
|
}
|
|
else if(events[idx].data.u64 ==(u64_t)timer_fd)
|
|
{
|
|
u64_t value;
|
|
read(timer_fd, &value, 8);
|
|
client_on_timer(conn_info);
|
|
|
|
mylog(log_trace,"epoll_trigger_counter: %d \n",epoll_trigger_counter);
|
|
epoll_trigger_counter=0;
|
|
}
|
|
else if (events[idx].data.u64 == (u64_t)udp_fd)
|
|
{
|
|
|
|
int recv_len;
|
|
struct sockaddr_in udp_new_addr_in={0};
|
|
socklen_t udp_new_addr_len = sizeof(sockaddr_in);
|
|
if ((recv_len = recvfrom(udp_fd, buf, max_data_len, 0,
|
|
(struct sockaddr *) &udp_new_addr_in, &udp_new_addr_len)) == -1) {
|
|
mylog(log_error,"recv_from error,this shouldnt happen at client\n");
|
|
myexit(1);
|
|
};
|
|
|
|
if(recv_len>=mtu_warn)
|
|
{
|
|
mylog(log_warn,"huge packet,data len=%d (>=%d).strongly suggested to set a smaller mtu at upper level,to get rid of this warn\n ",recv_len,mtu_warn);
|
|
}
|
|
mylog(log_trace,"Received packet from %s:%d,len: %d\n", inet_ntoa(udp_new_addr_in.sin_addr),
|
|
ntohs(udp_new_addr_in.sin_port),recv_len);
|
|
|
|
/*
|
|
if(udp_old_addr_in.sin_addr.s_addr==0&&udp_old_addr_in.sin_port==0)
|
|
{
|
|
memcpy(&udp_old_addr_in,&udp_new_addr_in,sizeof(udp_new_addr_in));
|
|
}
|
|
else if(udp_new_addr_in.sin_addr.s_addr!=udp_old_addr_in.sin_addr.s_addr
|
|
||udp_new_addr_in.sin_port!=udp_old_addr_in.sin_port)
|
|
{
|
|
if(get_current_time()- last_udp_recv_time <udp_timeout)
|
|
{
|
|
printf("new <ip,port> connected in,ignored,bc last connection is still active\n");
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
printf("new <ip,port> connected in,accpeted\n");
|
|
memcpy(&udp_old_addr_in,&udp_new_addr_in,sizeof(udp_new_addr_in));
|
|
conv_id++;
|
|
}
|
|
}*/
|
|
|
|
//last_udp_recv_time=get_current_time();
|
|
u64_t u64=((u64_t(udp_new_addr_in.sin_addr.s_addr))<<32u)+ntohs(udp_new_addr_in.sin_port);
|
|
u32_t conv;
|
|
|
|
if(!conn_info.blob->conv_manager.is_u64_used(u64))
|
|
{
|
|
if(conn_info.blob->conv_manager.get_size() >=max_conv_num)
|
|
{
|
|
mylog(log_warn,"ignored new udp connect bc max_conv_num exceed\n");
|
|
continue;
|
|
}
|
|
conv=conn_info.blob->conv_manager.get_new_conv();
|
|
conn_info.blob->conv_manager.insert_conv(conv,u64);
|
|
mylog(log_info,"new packet from %s:%d,conv_id=%x\n",inet_ntoa(udp_new_addr_in.sin_addr),ntohs(udp_new_addr_in.sin_port),conv);
|
|
}
|
|
else
|
|
{
|
|
conv=conn_info.blob->conv_manager.find_conv_by_u64(u64);
|
|
}
|
|
|
|
conn_info.blob->conv_manager.update_active_time(conv);
|
|
|
|
if(conn_info.state.client_current_state==client_ready)
|
|
{
|
|
/*
|
|
char buf2[6000];
|
|
int ret1=send_raw(conn_info.raw_info,buf2,40);
|
|
int ret2=send_raw(conn_info.raw_info,buf2,500);
|
|
int ret3=send_raw(conn_info.raw_info,buf2,1000);
|
|
int ret4=send_raw(conn_info.raw_info,buf2,2000);
|
|
mylog(log_warn,"ret= %d %d %d %d\n",ret1,ret2,ret3,ret4);*/
|
|
|
|
send_data_safer(conn_info,buf,recv_len,conv);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
mylog(log_fatal,"unknown fd,this should never happen\n");
|
|
myexit(-1);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int server_event_loop()
|
|
{
|
|
char buf[buf_len];
|
|
|
|
int i, j, k;int ret;
|
|
|
|
bind_address_uint32=local_ip_uint32;//only server has bind adress,client sets it to zero
|
|
|
|
if(lower_level)
|
|
{
|
|
if(lower_level_manual)
|
|
{
|
|
init_ifindex(if_name,ifindex);
|
|
mylog(log_info,"we are running at lower-level (manual) mode\n");
|
|
}
|
|
else
|
|
{
|
|
mylog(log_info,"we are running at lower-level (auto) mode\n");
|
|
}
|
|
|
|
}
|
|
|
|
if(raw_mode==mode_faketcp)
|
|
{
|
|
bind_fd=socket(AF_INET,SOCK_STREAM,0);
|
|
}
|
|
else if(raw_mode==mode_udp||raw_mode==mode_icmp)//bind an adress to avoid collision,for icmp,there is no port,just bind a udp port
|
|
{
|
|
bind_fd=socket(AF_INET,SOCK_DGRAM,0);
|
|
}
|
|
|
|
struct sockaddr_in temp_bind_addr={0};
|
|
// bzero(&temp_bind_addr, sizeof(temp_bind_addr));
|
|
|
|
temp_bind_addr.sin_family = AF_INET;
|
|
temp_bind_addr.sin_port = htons(local_port);
|
|
temp_bind_addr.sin_addr.s_addr = local_ip_uint32;
|
|
|
|
if (bind(bind_fd, (struct sockaddr*)&temp_bind_addr, sizeof(temp_bind_addr)) !=0)
|
|
{
|
|
mylog(log_fatal,"bind fail\n");
|
|
myexit(-1);
|
|
}
|
|
|
|
if(raw_mode==mode_faketcp)
|
|
{
|
|
|
|
if(listen(bind_fd, SOMAXCONN) != 0 )
|
|
{
|
|
mylog(log_fatal,"listen fail\n");
|
|
myexit(-1);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
//init_raw_socket();
|
|
init_filter(local_port);//bpf filter
|
|
|
|
epollfd = epoll_create1(0);
|
|
const int max_events = 4096;
|
|
|
|
struct epoll_event ev, events[max_events];
|
|
if (epollfd < 0) {
|
|
mylog(log_fatal,"epoll return %d\n", epollfd);
|
|
myexit(-1);
|
|
}
|
|
|
|
ev.events = EPOLLIN;
|
|
ev.data.u64 = raw_recv_fd;
|
|
|
|
ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, raw_recv_fd, &ev);
|
|
if (ret!= 0) {
|
|
mylog(log_fatal,"add raw_fd error\n");
|
|
myexit(-1);
|
|
}
|
|
int timer_fd;
|
|
|
|
set_timer(epollfd,timer_fd);
|
|
|
|
u64_t begin_time=0;
|
|
u64_t end_time=0;
|
|
|
|
mylog(log_info,"now listening at %s:%d\n",my_ntoa(local_ip_uint32),local_port);
|
|
while(1)////////////////////////
|
|
{
|
|
|
|
if(about_to_exit) myexit(0);
|
|
|
|
int nfds = epoll_wait(epollfd, events, max_events, 180 * 1000);
|
|
if (nfds < 0) { //allow zero
|
|
if(errno==EINTR )
|
|
{
|
|
mylog(log_info,"epoll interrupted by signal\n");
|
|
myexit(0);
|
|
}
|
|
else
|
|
{
|
|
mylog(log_fatal,"epoll_wait return %d\n", nfds);
|
|
myexit(-1);
|
|
}
|
|
}
|
|
int idx;
|
|
for (idx = 0; idx < nfds; ++idx)
|
|
{
|
|
//mylog(log_debug,"ndfs: %d \n",nfds);
|
|
epoll_trigger_counter++;
|
|
//printf("%d %d %d %d\n",timer_fd,raw_recv_fd,raw_send_fd,n);
|
|
if ((events[idx].data.u64 ) == (u64_t)timer_fd)
|
|
{
|
|
if(debug_flag)begin_time=get_current_time();
|
|
conn_manager.clear_inactive();
|
|
u64_t dummy;
|
|
read(timer_fd, &dummy, 8);
|
|
//current_time_rough=get_current_time();
|
|
if(debug_flag)
|
|
{
|
|
end_time=get_current_time();
|
|
mylog(log_debug,"timer_fd,%llu,%llu,%llu\n",begin_time,end_time,end_time-begin_time);
|
|
}
|
|
|
|
mylog(log_trace,"epoll_trigger_counter: %d \n",epoll_trigger_counter);
|
|
epoll_trigger_counter=0;
|
|
|
|
}
|
|
else if (events[idx].data.u64 == (u64_t)raw_recv_fd)
|
|
{
|
|
if(debug_flag)begin_time=get_current_time();
|
|
server_on_raw_recv_multi();
|
|
if(debug_flag)
|
|
{
|
|
end_time=get_current_time();
|
|
mylog(log_debug,"raw_recv_fd,%llu,%llu,%llu \n",begin_time,end_time,end_time-begin_time);
|
|
}
|
|
}
|
|
else if ((events[idx].data.u64 >>32u) == 2u)
|
|
{
|
|
if(debug_flag)begin_time=get_current_time();
|
|
int fd=get_u64_l(events[idx].data.u64);
|
|
u64_t dummy;
|
|
read(fd, &dummy, 8);
|
|
|
|
if(conn_manager.timer_fd_mp.find(fd)==conn_manager.timer_fd_mp.end()) //this can happen,when fd is a just closed fd
|
|
{
|
|
mylog(log_info,"timer_fd no longer exits\n");
|
|
continue;
|
|
}
|
|
conn_info_t* p_conn_info=conn_manager.timer_fd_mp[fd];
|
|
u32_t ip=p_conn_info->raw_info.recv_info.src_ip;
|
|
u32_t port=p_conn_info->raw_info.recv_info.src_port;
|
|
assert(conn_manager.exist(ip,port));//TODO remove this for peformance
|
|
|
|
assert(p_conn_info->state.server_current_state == server_ready); //TODO remove this for peformance
|
|
|
|
//conn_info_t &conn_info=conn_manager.find(ip,port);
|
|
char ip_port[40];
|
|
|
|
sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
|
|
|
|
server_on_timer_multi(*p_conn_info,ip_port);
|
|
|
|
if(debug_flag)
|
|
{
|
|
end_time=get_current_time();
|
|
mylog(log_debug,"(events[idx].data.u64 >>32u) == 2u ,%llu,%llu,%llu \n",begin_time,end_time,end_time-begin_time);
|
|
}
|
|
}
|
|
else if ((events[idx].data.u64 >>32u) == 1u)
|
|
{
|
|
//uint32_t conv_id=events[n].data.u64>>32u;
|
|
|
|
if(debug_flag)begin_time=get_current_time();
|
|
|
|
int fd=int((events[idx].data.u64<<32u)>>32u);
|
|
|
|
if(conn_manager.udp_fd_mp.find(fd)==conn_manager.udp_fd_mp.end()) //this can happen,when fd is a just closed fd
|
|
{
|
|
mylog(log_debug,"fd no longer exists in udp_fd_mp,udp fd %d\n",fd);
|
|
recv(fd,0,0,0);
|
|
continue;
|
|
}
|
|
conn_info_t* p_conn_info=conn_manager.udp_fd_mp[fd];
|
|
|
|
u32_t ip=p_conn_info->raw_info.recv_info.src_ip;
|
|
u32_t port=p_conn_info->raw_info.recv_info.src_port;
|
|
if(!conn_manager.exist(ip,port))//TODO remove this for peformance
|
|
{
|
|
mylog(log_fatal,"ip port no longer exits 2!!!this shouldnt happen\n");
|
|
myexit(-1);
|
|
}
|
|
|
|
if(p_conn_info->state.server_current_state!=server_ready)//TODO remove this for peformance
|
|
{
|
|
mylog(log_fatal,"p_conn_info->state.server_current_state!=server_ready!!!this shouldnt happen\n");
|
|
myexit(-1);
|
|
}
|
|
|
|
conn_info_t &conn_info=*p_conn_info;
|
|
|
|
if(!conn_info.blob->conv_manager.is_u64_used(fd))
|
|
{
|
|
mylog(log_debug,"conv no longer exists,udp fd %d\n",fd);
|
|
int recv_len=recv(fd,0,0,0); ///////////TODO ,delete this
|
|
continue;
|
|
}
|
|
|
|
u32_t conv_id=conn_info.blob->conv_manager.find_conv_by_u64(fd);
|
|
|
|
int recv_len=recv(fd,buf,max_data_len,0);
|
|
|
|
mylog(log_trace,"received a packet from udp_fd,len:%d\n",recv_len);
|
|
|
|
if(recv_len<0)
|
|
{
|
|
mylog(log_debug,"udp fd,recv_len<0 continue,%s\n",strerror(errno));
|
|
|
|
continue;
|
|
}
|
|
|
|
if(recv_len>=mtu_warn)
|
|
{
|
|
mylog(log_warn,"huge packet,data len=%d (>=%d).strongly suggested to set a smaller mtu at upper level,to get rid of this warn\n ",recv_len,mtu_warn);
|
|
}
|
|
|
|
//conn_info.conv_manager->update_active_time(conv_id); server dosnt update from upd side,only update from raw side. (client updates at both side)
|
|
|
|
if(conn_info.state.server_current_state==server_ready)
|
|
{
|
|
send_data_safer(conn_info,buf,recv_len,conv_id);
|
|
//send_data(g_packet_info_send,buf,recv_len,my_id,oppsite_id,conv_id);
|
|
mylog(log_trace,"send_data_safer ,sent !!\n");
|
|
}
|
|
|
|
if(debug_flag)
|
|
{
|
|
end_time=get_current_time();
|
|
mylog(log_debug,"(events[idx].data.u64 >>32u) == 1u,%lld,%lld,%lld \n",begin_time,end_time,end_time-begin_time);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
mylog(log_fatal,"unknown fd,this should never happen\n");
|
|
myexit(-1);
|
|
}
|
|
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
//char lower_level_arg[1000];
|
|
int process_lower_level_arg()//handle --lower-level option
|
|
{
|
|
lower_level=1;
|
|
if(strcmp(optarg,"auto")==0)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
lower_level_manual=1;
|
|
if (strchr(optarg, '#') == 0) {
|
|
mylog(log_fatal,
|
|
"lower-level parameter invaild,check help page for format\n");
|
|
myexit(-1);
|
|
}
|
|
lower_level = 1;
|
|
u32_t hw[6];
|
|
memset(hw, 0, sizeof(hw));
|
|
sscanf(optarg, "%[^#]#%x:%x:%x:%x:%x:%x", if_name, &hw[0], &hw[1], &hw[2],
|
|
&hw[3], &hw[4], &hw[5]);
|
|
|
|
mylog(log_warn,
|
|
"make sure this is correct: if_name=<%s> dest_mac_adress=<%02x:%02x:%02x:%02x:%02x:%02x> \n",
|
|
if_name, hw[0], hw[1], hw[2], hw[3], hw[4], hw[5]);
|
|
for (int i = 0; i < 6; i++) {
|
|
dest_hw_addr[i] = uint8_t(hw[i]);
|
|
}
|
|
return 0;
|
|
}
|
|
void print_help()
|
|
{
|
|
printf("udp2raw-tunnel\n");
|
|
printf("version: %s %s\n",__DATE__,__TIME__);
|
|
printf("repository: https://github.com/wangyu-/udp2raw-tunnel\n");
|
|
printf("\n");
|
|
printf("usage:\n");
|
|
printf(" run as client : ./this_program -c -l local_listen_ip:local_port -r server_ip:server_port [options]\n");
|
|
printf(" run as server : ./this_program -s -l server_listen_ip:server_port -r remote_ip:remote_port [options]\n");
|
|
printf("\n");
|
|
printf("common options,these options must be same on both side:\n");
|
|
printf(" --raw-mode <string> avaliable values:faketcp(default),udp,icmp\n");
|
|
printf(" -k,--key <string> password to gen symetric key,default:\"secret key\"\n");
|
|
printf(" --cipher-mode <string> avaliable values:aes128cbc(default),xor,none\n");
|
|
printf(" --auth-mode <string> avaliable values:md5(default),crc32,simple,none\n");
|
|
printf(" -a,--auto-rule auto add (and delete) iptables rule\n");
|
|
printf(" -g,--gen-rule generate iptables rule then exit,so that you can copy and\n");
|
|
printf(" add it manually.overrides -a\n");
|
|
printf(" --disable-anti-replay disable anti-replay,not suggested\n");
|
|
|
|
//printf("\n");
|
|
printf("client options:\n");
|
|
printf(" --source-ip <ip> force source-ip for raw socket\n");
|
|
printf(" --source-port <port> force source-port for raw socket,tcp/udp only\n");
|
|
printf(" this option disables port changing while re-connecting\n");
|
|
// printf(" \n");
|
|
printf("other options:\n");
|
|
printf(" --conf-file <string> read options from a configuration file instead of command line.\n");
|
|
printf(" check example.conf in repo for format\n");
|
|
printf(" --log-level <number> 0:never 1:fatal 2:error 3:warn \n");
|
|
printf(" 4:info (default) 5:debug 6:trace\n");
|
|
// printf("\n");
|
|
printf(" --log-position enable file name,function name,line number in log\n");
|
|
printf(" --disable-color disable log color\n");
|
|
printf(" --disable-bpf disable the kernel space filter,most time its not necessary\n");
|
|
printf(" unless you suspect there is a bug\n");
|
|
// printf("\n");
|
|
printf(" --sock-buf <number> buf size for socket,>=10 and <=10240,unit:kbyte,default:1024\n");
|
|
printf(" --seqmode <number> seq increase mode for faketcp:\n");
|
|
printf(" 0:dont increase\n");
|
|
printf(" 1:increase every packet(default)\n");
|
|
printf(" 2:increase randomly, about every 3 packets\n");
|
|
// printf("\n");
|
|
printf(" --lower-level <string> send packets at OSI level 2, format:'if_name#dest_mac_adress'\n");
|
|
printf(" ie:'eth0#00:23:45:67:89:b9'.or try '--lower-level auto' to obtain\n");
|
|
printf(" the parameter automatically,specify it manually if 'auto' failed\n");
|
|
printf(" --gen-add generate iptables rule and add it permanently,then exit.overrides -g\n");
|
|
printf(" --keep-rule monitor iptables and auto re-add if necessary.implys -a\n");
|
|
printf(" --clear clear any iptables rules added by this program.overrides everything\n");
|
|
printf(" -h,--help print this help message\n");
|
|
|
|
//printf("common options,these options must be same on both side\n");
|
|
}
|
|
|
|
int load_config(char *file_name, int &argc, vector<string> &argv) //load conf file and append to argv
|
|
{
|
|
// Load configurations from config_file instead of the command line.
|
|
// See config.example for example configurations
|
|
std::ifstream conf_file(file_name);
|
|
std::string line;
|
|
if(conf_file.fail())
|
|
{
|
|
mylog(log_fatal,"conf_file %s open failed,reason :%s\n",file_name,strerror(errno));
|
|
myexit(-1);
|
|
}
|
|
while(std::getline(conf_file,line))
|
|
{
|
|
auto res=parse_conf_line(line);
|
|
|
|
argc+=res.size();
|
|
for(int i=0;i<(int)res.size();i++)
|
|
{
|
|
argv.push_back(res[i]);
|
|
}
|
|
}
|
|
conf_file.close();
|
|
|
|
return 0;
|
|
}
|
|
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);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int process_log_level(int argc,char *argv[])//process --log-level and --disable-cloer --log-postion options
|
|
{
|
|
int i,j,k;
|
|
for (i = 0; i < argc; i++)
|
|
{
|
|
if(strcmp(argv[i],"--log-level")==0)
|
|
{
|
|
if(i<argc -1)
|
|
{
|
|
sscanf(argv[i+1],"%d",&log_level);
|
|
if(0<=log_level&&log_level<log_end)
|
|
{
|
|
}
|
|
else
|
|
{
|
|
log_bare(log_fatal,"invalid log_level\n");
|
|
myexit(-1);
|
|
}
|
|
}
|
|
}
|
|
if(strcmp(argv[i],"--disable-color")==0)
|
|
{
|
|
enable_log_color=0;
|
|
}
|
|
if(strcmp(argv[i],"--log-position")==0)
|
|
{
|
|
enable_log_position=1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
void process_arg(int argc, char *argv[]) //process all options
|
|
{
|
|
int i,j,k,opt;
|
|
|
|
int option_index = 0;
|
|
|
|
char options[]="l:r:schk:ag";
|
|
static struct option long_options[] =
|
|
{
|
|
/* These options set a flag. */
|
|
{"source-ip", required_argument, 0, 1},
|
|
{"source-port", required_argument, 0, 1},
|
|
{"log-level", required_argument, 0, 1},
|
|
{"key", required_argument, 0, 'k'},
|
|
{"auth-mode", required_argument, 0, 1},
|
|
{"cipher-mode", required_argument, 0, 1},
|
|
{"raw-mode", required_argument, 0, 1},
|
|
{"disable-color", no_argument, 0, 1},
|
|
{"log-position", no_argument, 0, 1},
|
|
{"disable-bpf", no_argument, 0, 1},
|
|
{"disable-anti-replay", no_argument, 0, 1},
|
|
{"auto-rule", no_argument, 0, 'a'},
|
|
{"gen-rule", no_argument, 0, 'g'},
|
|
{"gen-add", no_argument, 0, 1},
|
|
{"debug", no_argument, 0, 1},
|
|
{"clear", no_argument, 0, 1},
|
|
{"simple-rule", no_argument, 0, 1},
|
|
{"keep-rule", no_argument, 0, 1},
|
|
{"lower-level", required_argument, 0, 1},
|
|
{"sock-buf", required_argument, 0, 1},
|
|
{"seq-mode", required_argument, 0, 1},
|
|
{"conf-file", required_argument, 0, 1},
|
|
{NULL, 0, 0, 0}
|
|
};
|
|
|
|
process_log_level(argc,argv);
|
|
|
|
set<string> all_options;
|
|
map<string,string> shortcut_map;
|
|
|
|
all_options.insert("--help");
|
|
all_options.insert("-h");
|
|
string dummy="";
|
|
for(i=0;i<(int)strlen(options);i++)
|
|
{
|
|
|
|
char val=options[i];
|
|
if( ( val>='0'&&val<='9') ||( val>='a'&&val<='z')||(val>='A'&&val<='Z'))
|
|
{
|
|
all_options.insert(dummy+'-'+val);
|
|
}
|
|
}
|
|
for(i=0;i<int( sizeof(long_options)/sizeof(long_options[0]) );i++)
|
|
{
|
|
if(long_options[i].name==NULL) break;
|
|
int val=long_options[i].val;
|
|
if( ( val>='0'&&val<='9') ||( val>='a'&&val<='z')||(val>='A'&&val<='Z'))
|
|
{
|
|
shortcut_map[dummy+"--"+long_options[i].name]= dummy+"-"+ char(val);
|
|
}
|
|
all_options.insert(dummy+"--"+long_options[i].name);
|
|
}
|
|
|
|
for (i = 0; i < argc; i++)
|
|
{
|
|
int len=strlen(argv[i]);
|
|
if(len==0)
|
|
{
|
|
mylog(log_fatal,"found an empty string in options\n");
|
|
myexit(-1);
|
|
}
|
|
if(len==1&&argv[i][0]=='-' )
|
|
{
|
|
mylog(log_fatal,"invaild option '-' in argv\n");
|
|
myexit(-1);
|
|
}
|
|
if(len==2&&argv[i][0]=='-'&&argv[i][1]=='-' )
|
|
{
|
|
mylog(log_fatal,"invaild option '--' in argv\n");
|
|
myexit(-1);
|
|
}
|
|
}
|
|
|
|
mylog(log_info,"argc=%d ", argc);
|
|
|
|
for (i = 0; i < argc; i++) {
|
|
log_bare(log_info, "%s ", argv[i]);
|
|
}
|
|
log_bare(log_info, "\n");
|
|
|
|
//string dummy="";
|
|
for(i=+1;i<argc;i++)
|
|
{
|
|
if(argv[i][0]!='-') continue;
|
|
string a=argv[i];
|
|
if(a[0]=='-'&&a[1]!='-')
|
|
a=dummy+a[0]+a[1];
|
|
|
|
if(all_options.find(a.c_str())==all_options.end())
|
|
{
|
|
mylog(log_fatal,"invaild option %s\n",a.c_str());
|
|
myexit(-1);
|
|
}
|
|
for(j=i+1;j<argc;j++)
|
|
{
|
|
if(argv[j][0]!='-') continue;
|
|
|
|
string b=argv[j];
|
|
|
|
if(b[0]=='-'&&b[1]!='-')
|
|
b=dummy+b[0]+b[1];
|
|
|
|
if(shortcut_map.find(a)!=shortcut_map.end())
|
|
a=shortcut_map[a];
|
|
if(shortcut_map.find(b)!=shortcut_map.end())
|
|
b=shortcut_map[b];
|
|
if(a==b)
|
|
{
|
|
mylog(log_fatal,"%s duplicates with %s\n",argv[i],argv[j]);
|
|
myexit(-1);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
int no_l = 1, no_r = 1;
|
|
while ((opt = getopt_long(argc, argv,options,long_options,&option_index)) != -1) {
|
|
//string opt_key;
|
|
//opt_key+=opt;
|
|
switch (opt) {
|
|
case 'l':
|
|
no_l = 0;
|
|
if (strchr(optarg, ':') != 0) {
|
|
sscanf(optarg, "%[^:]:%d", local_ip, &local_port);
|
|
if(local_port==22)
|
|
{
|
|
mylog(log_fatal,"port 22 not allowed\n");
|
|
myexit(-1);
|
|
}
|
|
} else {
|
|
mylog(log_fatal,"invalid parameter for -l ,%s,should be ip:port\n",optarg);
|
|
myexit(-1);
|
|
|
|
}
|
|
break;
|
|
case 'r':
|
|
no_r = 0;
|
|
if (strchr(optarg, ':') != 0) {
|
|
sscanf(optarg, "%[^:]:%d", remote_ip, &remote_port);
|
|
if(remote_port==22)
|
|
{
|
|
mylog(log_fatal,"port 22 not allowed\n");
|
|
myexit(-1);
|
|
}
|
|
} else {
|
|
mylog(log_fatal,"invalid parameter for -r ,%s,should be ip:port\n",optarg);
|
|
myexit(-1);
|
|
}
|
|
break;
|
|
case 's':
|
|
if(program_mode==0)
|
|
{
|
|
program_mode=server_mode;
|
|
}
|
|
else
|
|
{
|
|
mylog(log_fatal,"-s /-c has already been set,conflict\n");
|
|
myexit(-1);
|
|
}
|
|
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':
|
|
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)
|
|
{
|
|
char *output;
|
|
//int ret =system("iptables-save |grep udp2raw_dWRwMnJhdw|sed -n 's/^-A/iptables -D/p'|sh");
|
|
int ret =run_command("iptables -S|sed -n '/udp2rawDwrW/p'|sed -n 's/^-A/iptables -D/p'|sh",output);
|
|
|
|
int ret2 =run_command("iptables -S|sed -n '/udp2rawDwrW/p'|sed -n 's/^-N/iptables -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);
|
|
}
|
|
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);
|
|
mylog(log_debug,"source: %s\n",source_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);
|
|
}
|
|
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);
|
|
}
|
|
}
|
|
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)
|
|
{
|
|
for(i=0;i<cipher_end;i++)
|
|
{
|
|
if(strcmp(optarg,cipher_mode_tostring[i])==0)
|
|
{
|
|
cipher_mode=(cipher_mode_t)i;
|
|
break;
|
|
}
|
|
}
|
|
if(i==cipher_end)
|
|
{
|
|
|
|
myexit(-1);
|
|
}
|
|
}
|
|
else if(strcmp(long_options[option_index].name,"log-level")==0)
|
|
{
|
|
}
|
|
else if(strcmp(long_options[option_index].name,"lower-level")==0)
|
|
{
|
|
process_lower_level_arg();
|
|
//lower_level=1;
|
|
//strcpy(lower_level_arg,optarg);
|
|
}
|
|
else if(strcmp(long_options[option_index].name,"simple-rule")==0)
|
|
{
|
|
simple_rule=1;
|
|
}
|
|
else if(strcmp(long_options[option_index].name,"keep-rule")==0)
|
|
{
|
|
keep_rule=1;
|
|
}
|
|
else if(strcmp(long_options[option_index].name,"gen-add")==0)
|
|
{
|
|
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,"debug")==0)
|
|
{
|
|
debug_flag=1;
|
|
//enable_log_color=0;
|
|
}
|
|
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,"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<=2)
|
|
{
|
|
}
|
|
else
|
|
{
|
|
mylog(log_fatal,"seq_mode value must be 0,1,or 2 \n");
|
|
myexit(-1);
|
|
}
|
|
}
|
|
else if(strcmp(long_options[option_index].name,"conf-file")==0)
|
|
{
|
|
mylog(log_info,"configuration loaded from %s\n",optarg);
|
|
}
|
|
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(lower_level)
|
|
//process_lower_level_arg();
|
|
|
|
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_ip=%s ",local_ip);
|
|
log_bare(log_info,"local_port=%d ",local_port);
|
|
log_bare(log_info,"remote_ip=%s ",remote_ip);
|
|
log_bare(log_info,"remote_port=%d ",remote_port);
|
|
log_bare(log_info,"source_ip=%s ",source_ip);
|
|
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);
|
|
|
|
}
|
|
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
|
|
{
|
|
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)
|
|
{
|
|
if(raw_mode==mode_faketcp)
|
|
{
|
|
sprintf(tmp_pattern,"-s %s/32 -p tcp -m tcp --sport %d",remote_ip,remote_port);
|
|
}
|
|
if(raw_mode==mode_udp)
|
|
{
|
|
sprintf(tmp_pattern,"-s %s/32 -p udp -m udp --sport %d",remote_ip,remote_port);
|
|
}
|
|
if(raw_mode==mode_icmp)
|
|
{
|
|
sprintf(tmp_pattern,"-s %s/32 -p icmp",remote_ip);
|
|
}
|
|
pattern=tmp_pattern;
|
|
}
|
|
if(program_mode==server_mode)
|
|
{
|
|
|
|
if(raw_mode==mode_faketcp)
|
|
{
|
|
sprintf(tmp_pattern,"-p tcp -m tcp --dport %d",local_port);
|
|
}
|
|
if(raw_mode==mode_udp)
|
|
{
|
|
sprintf(tmp_pattern,"-p udp -m udp --dport %d",local_port);
|
|
}
|
|
if(raw_mode==mode_icmp)
|
|
{
|
|
if(local_ip_uint32==0)
|
|
{
|
|
sprintf(tmp_pattern,"-p icmp");
|
|
}
|
|
else
|
|
{
|
|
sprintf(tmp_pattern,"-d %s/32 -p icmp",local_ip);
|
|
}
|
|
}
|
|
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(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;
|
|
}
|
|
}
|
|
if(generate_iptables_rule)
|
|
{
|
|
string rule="iptables -I ";
|
|
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);
|
|
}
|
|
|
|
|
|
}
|
|
|
|
/*
|
|
int test()
|
|
{
|
|
|
|
char ip_str[100]="8.8.8.8";
|
|
u32_t ip=inet_addr(ip_str);
|
|
u32_t dest_ip;
|
|
string if_name;
|
|
string hw;
|
|
find_lower_level_info(ip,dest_ip,if_name,hw);
|
|
printf("%s %s %s\n",my_ntoa(dest_ip),if_name.c_str(),hw.c_str());
|
|
exit(0);
|
|
return 0;
|
|
}*/
|
|
int main(int argc, char *argv[])
|
|
{
|
|
//test();
|
|
//printf("%s\n",my_ntoa(0x00ffffff));
|
|
//auto a=string_to_vec("a b c d ");
|
|
//printf("%d\n",(int)a.size());
|
|
//printf("%d %d %d %d",larger_than_u32(1,2),larger_than_u32(2,1),larger_than_u32(0xeeaaeebb,2),larger_than_u32(2,0xeeaaeebb));
|
|
//assert(0==1);
|
|
dup2(1, 2);//redirect stderr to stdout
|
|
signal(SIGINT, signal_handler);
|
|
signal(SIGHUP, signal_handler);
|
|
signal(SIGKILL, signal_handler);
|
|
signal(SIGTERM, signal_handler);
|
|
signal(SIGQUIT, signal_handler);
|
|
|
|
pre_process_arg(argc,argv);
|
|
|
|
if(geteuid() != 0)
|
|
{
|
|
mylog(log_error,"root check failed,make sure you run this program with root,we can try to continue,but it will likely fail\n");
|
|
}
|
|
|
|
local_ip_uint32=inet_addr(local_ip);
|
|
remote_ip_uint32=inet_addr(remote_ip);
|
|
source_ip_uint32=inet_addr(source_ip);
|
|
|
|
|
|
//current_time_rough=get_current_time();
|
|
|
|
init_random_number_fd();
|
|
srand(get_true_random_number_nz());
|
|
const_id=get_true_random_number_nz();
|
|
|
|
mylog(log_info,"const_id:%x\n",const_id);
|
|
|
|
char tmp[1000]="";
|
|
|
|
strcat(tmp,key_string);
|
|
|
|
strcat(tmp,"key1");
|
|
|
|
md5((uint8_t*)tmp,strlen(tmp),(uint8_t*)key);
|
|
|
|
/*
|
|
tmp[0]=0;
|
|
|
|
strcat(tmp,key_string);
|
|
|
|
strcat(tmp,"key2");
|
|
|
|
md5((uint8_t*)tmp,strlen(tmp),(uint8_t*)key2);*/
|
|
|
|
iptables_rule();
|
|
init_raw_socket();
|
|
|
|
if(program_mode==client_mode)
|
|
{
|
|
client_event_loop();
|
|
}
|
|
else
|
|
{
|
|
server_event_loop();
|
|
}
|
|
|
|
return 0;
|
|
}
|