mirror of
https://github.com/wangyu-/udp2raw.git
synced 2025-02-07 23:59:36 +08:00
844 lines
22 KiB
C++
Executable File
844 lines
22 KiB
C++
Executable File
#include "common.h"
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#include "network.h"
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#include "connection.h"
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#include "misc.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 "fd_manager.h"
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char hb_buf[buf_len];
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int on_epoll_recv_event=0; //TODO, just a flag to help detect epoll infinite shoot
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int client_on_timer(conn_info_t &conn_info) //for client. called when a timer is ready in epoll
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{
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//keep_iptables_rule();
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packet_info_t &send_info=conn_info.raw_info.send_info;
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packet_info_t &recv_info=conn_info.raw_info.recv_info;
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raw_info_t &raw_info=conn_info.raw_info;
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conn_info.blob->conv_manager.clear_inactive();
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mylog(log_trace,"timer!\n");
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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);
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mylog(log_trace,"<client_on_timer,send_info.ts_ack= %u>\n",send_info.ts_ack);
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if(raw_info.disabled)
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{
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conn_info.state.client_current_state=client_idle;
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conn_info.my_id=get_true_random_number_nz();
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mylog(log_info,"state back to client_idle\n");
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}
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if(conn_info.state.client_current_state==client_idle)
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{
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raw_info.rst_received=0;
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raw_info.disabled=0;
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fail_time_counter++;
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if(max_fail_time>0&&fail_time_counter>max_fail_time)
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{
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mylog(log_fatal,"max_fail_time exceed\n");
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myexit(-1);
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}
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conn_info.blob->anti_replay.re_init();
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conn_info.my_id = get_true_random_number_nz(); ///todo no need to do this everytime
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u32_t new_ip=0;
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if(!force_source_ip&&get_src_adress(new_ip,remote_ip_uint32,remote_port)==0)
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{
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if(new_ip!=source_ip_uint32)
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{
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mylog(log_info,"source ip changed from %s to ",my_ntoa(source_ip_uint32));
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log_bare(log_info,"%s\n",my_ntoa(new_ip));
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source_ip_uint32=new_ip;
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send_info.src_ip=new_ip;
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}
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}
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if (source_port == 0)
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{
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send_info.src_port = client_bind_to_a_new_port(bind_fd,local_ip_uint32);
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}
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else
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{
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send_info.src_port = source_port;
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}
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if (raw_mode == mode_icmp)
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{
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send_info.dst_port = send_info.src_port;
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}
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mylog(log_info, "using port %d\n", send_info.src_port);
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init_filter(send_info.src_port);
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if(raw_mode==mode_icmp||raw_mode==mode_udp)
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{
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conn_info.state.client_current_state=client_handshake1;
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mylog(log_info,"state changed from client_idle to client_pre_handshake\n");
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}
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if(raw_mode==mode_faketcp)
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{
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conn_info.state.client_current_state=client_tcp_handshake;
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mylog(log_info,"state changed from client_idle to client_tcp_handshake\n");
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}
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conn_info.last_state_time=get_current_time();
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conn_info.last_hb_sent_time=0;
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//dont return;
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}
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if(conn_info.state.client_current_state==client_tcp_handshake) //send and resend syn
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{
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assert(raw_mode==mode_faketcp);
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if (get_current_time() - conn_info.last_state_time > client_handshake_timeout)
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{
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conn_info.state.client_current_state = client_idle;
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mylog(log_info, "state back to client_idle from client_tcp_handshake\n");
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return 0;
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}
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else if (get_current_time() - conn_info.last_hb_sent_time > client_retry_interval)
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{
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if (raw_mode == mode_faketcp)
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{
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if (conn_info.last_hb_sent_time == 0)
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{
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send_info.psh = 0;
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send_info.syn = 1;
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send_info.ack = 0;
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send_info.ts_ack =0;
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send_info.seq=get_true_random_number();
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send_info.ack_seq=get_true_random_number();
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}
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}
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send_raw0(raw_info, 0, 0);
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conn_info.last_hb_sent_time = get_current_time();
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mylog(log_info, "(re)sent tcp syn\n");
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return 0;
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}
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else
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{
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return 0;
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}
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return 0;
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}
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else if(conn_info.state.client_current_state==client_handshake1)//send and resend handshake1
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{
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if(get_current_time()-conn_info.last_state_time>client_handshake_timeout)
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{
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conn_info.state.client_current_state=client_idle;
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mylog(log_info,"state back to client_idle from client_handshake1\n");
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return 0;
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}
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else if(get_current_time()-conn_info.last_hb_sent_time>client_retry_interval)
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{
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if(raw_mode==mode_faketcp)
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{
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if(conn_info.last_hb_sent_time==0)
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{
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send_info.seq++;
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send_info.ack_seq=recv_info.seq+1;
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send_info.ts_ack=recv_info.ts;
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raw_info.reserved_send_seq=send_info.seq;
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}
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send_info.seq=raw_info.reserved_send_seq;
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send_info.psh = 0;
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send_info.syn = 0;
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send_info.ack = 1;
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send_raw0(raw_info, 0, 0);
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send_handshake(raw_info,conn_info.my_id,0,const_id);
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send_info.seq+=raw_info.send_info.data_len;
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}
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else
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{
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send_handshake(raw_info,conn_info.my_id,0,const_id);
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if(raw_mode==mode_icmp)
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send_info.icmp_seq++;
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}
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conn_info.last_hb_sent_time=get_current_time();
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mylog(log_info,"(re)sent handshake1\n");
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return 0;
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}
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else
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{
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return 0;
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}
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return 0;
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}
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else if(conn_info.state.client_current_state==client_handshake2)
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{
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if(get_current_time()-conn_info.last_state_time>client_handshake_timeout)
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{
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conn_info.state.client_current_state=client_idle;
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mylog(log_info,"state back to client_idle from client_handshake2\n");
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return 0;
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}
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else if(get_current_time()-conn_info.last_hb_sent_time>client_retry_interval)
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{
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if(raw_mode==mode_faketcp)
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{
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if(conn_info.last_hb_sent_time==0)
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{
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send_info.ack_seq=recv_info.seq+raw_info.recv_info.data_len;
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send_info.ts_ack=recv_info.ts;
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raw_info.reserved_send_seq=send_info.seq;
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}
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send_info.seq=raw_info.reserved_send_seq;
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send_handshake(raw_info,conn_info.my_id,conn_info.oppsite_id,const_id);
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send_info.seq+=raw_info.send_info.data_len;
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}
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else
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{
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send_handshake(raw_info,conn_info.my_id,conn_info.oppsite_id,const_id);
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if(raw_mode==mode_icmp)
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send_info.icmp_seq++;
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}
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conn_info.last_hb_sent_time=get_current_time();
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mylog(log_info,"(re)sent handshake2\n");
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return 0;
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}
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else
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{
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return 0;
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}
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return 0;
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}
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else if(conn_info.state.client_current_state==client_ready)
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{
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fail_time_counter=0;
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mylog(log_trace,"time %llu,%llu\n",get_current_time(),conn_info.last_state_time);
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if(get_current_time()-conn_info.last_hb_recv_time>client_conn_timeout)
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{
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conn_info.state.client_current_state=client_idle;
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conn_info.my_id=get_true_random_number_nz();
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mylog(log_info,"state back to client_idle from client_ready bc of server-->client direction timeout\n");
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return 0;
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}
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if(get_current_time()- conn_info.last_oppsite_roller_time>client_conn_uplink_timeout)
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{
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conn_info.state.client_current_state=client_idle;
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conn_info.my_id=get_true_random_number_nz();
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mylog(log_info,"state back to client_idle from client_ready bc of client-->server direction timeout\n");
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}
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if(get_current_time()-conn_info.last_hb_sent_time<heartbeat_interval)
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{
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return 0;
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}
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mylog(log_debug,"heartbeat sent <%x,%x>\n",conn_info.oppsite_id,conn_info.my_id);
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if(hb_mode==0)
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send_safer(conn_info,'h',hb_buf,0);/////////////send
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else
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send_safer(conn_info,'h',hb_buf,hb_len);
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conn_info.last_hb_sent_time=get_current_time();
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return 0;
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}
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else
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{
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mylog(log_fatal,"unknown state,this shouldnt happen.\n");
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myexit(-1);
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}
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return 0;
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}
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int client_on_raw_recv(conn_info_t &conn_info) //called when raw fd received a packet.
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{
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char* data;int data_len;
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packet_info_t &send_info=conn_info.raw_info.send_info;
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packet_info_t &recv_info=conn_info.raw_info.recv_info;
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raw_info_t &raw_info=conn_info.raw_info;
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mylog(log_trace,"<client_on_raw_recv,send_info.ts_ack= %u>\n",send_info.ts_ack);
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if(conn_info.state.client_current_state==client_idle )
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{
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recv(raw_recv_fd, 0,0, 0 );
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}
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else if(conn_info.state.client_current_state==client_tcp_handshake)//received syn ack
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{
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assert(raw_mode==mode_faketcp);
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if(recv_raw0(raw_info,data,data_len)<0)
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{
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return -1;
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}
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if(recv_info.src_ip!=send_info.dst_ip||recv_info.src_port!=send_info.dst_port)
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{
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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);
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return -1;
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}
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if(data_len==0&&raw_info.recv_info.syn==1&&raw_info.recv_info.ack==1)
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{
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if(recv_info.ack_seq!=send_info.seq+1)
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{
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mylog(log_debug,"seq ack_seq mis match\n");
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return -1;
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}
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conn_info.state.client_current_state = client_handshake1;
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mylog(log_info,"state changed from client_tcp_handshake to client_handshake1\n");
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conn_info.last_state_time = get_current_time();
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conn_info.last_hb_sent_time=0;
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client_on_timer(conn_info);
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return 0;
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}
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else
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{
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mylog(log_debug,"unexpected packet type,expected:syn ack\n");
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return -1;
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}
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}
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else if(conn_info.state.client_current_state==client_handshake1)//recevied respond of handshake1
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{
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if(recv_bare(raw_info,data,data_len)!=0)
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{
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mylog(log_debug,"recv_bare failed!\n");
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return -1;
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}
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if(recv_info.src_ip!=send_info.dst_ip||recv_info.src_port!=send_info.dst_port)
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{
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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);
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return -1;
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}
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if(data_len<int( 3*sizeof(id_t)))
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{
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mylog(log_debug,"too short to be a handshake\n");
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return -1;
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}
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//id_t tmp_oppsite_id= ntohl(* ((u32_t *)&data[0]));
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id_t tmp_oppsite_id;
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memcpy(&tmp_oppsite_id,&data[0],sizeof(tmp_oppsite_id));
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tmp_oppsite_id=ntohl(tmp_oppsite_id);
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//id_t tmp_my_id=ntohl(* ((u32_t *)&data[sizeof(id_t)]));
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id_t tmp_my_id;
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memcpy(&tmp_my_id,&data[sizeof(id_t)],sizeof(tmp_my_id));
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tmp_my_id=ntohl(tmp_my_id);
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//id_t tmp_oppsite_const_id=ntohl(* ((u32_t *)&data[sizeof(id_t)*2]));
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id_t tmp_oppsite_const_id;
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memcpy(&tmp_oppsite_const_id,&data[sizeof(id_t)*2],sizeof(tmp_oppsite_const_id));
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tmp_oppsite_const_id=ntohl(tmp_oppsite_const_id);
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if(tmp_my_id!=conn_info.my_id)
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{
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mylog(log_debug,"tmp_my_id doesnt match\n");
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return -1;
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}
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if(raw_mode==mode_faketcp)
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{
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if(recv_info.ack_seq!=send_info.seq)
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{
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mylog(log_debug,"seq ack_seq mis match\n");
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return -1;
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}
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if(recv_info.seq!=send_info.ack_seq)
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{
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mylog(log_debug,"seq ack_seq mis match\n");
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return -1;
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}
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}
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conn_info.oppsite_id=tmp_oppsite_id;
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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);
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//send_handshake(raw_info,conn_info.my_id,conn_info.oppsite_id,const_id); //////////////send
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conn_info.state.client_current_state = client_handshake2;
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conn_info.last_state_time = get_current_time();
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conn_info.last_hb_sent_time=0;
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client_on_timer(conn_info);
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return 0;
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}
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else if(conn_info.state.client_current_state==client_handshake2||conn_info.state.client_current_state==client_ready)//received heartbeat or data
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{
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char type;
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if(recv_safer(conn_info,type,data,data_len)!=0)
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{
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mylog(log_debug,"recv_safer failed!\n");
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return -1;
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}
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if(recv_info.src_ip!=send_info.dst_ip||recv_info.src_port!=send_info.dst_port)
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{
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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);
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return -1;
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}
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if(conn_info.state.client_current_state==client_handshake2)
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{
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mylog(log_info,"changed state from to client_handshake2 to client_ready\n");
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conn_info.state.client_current_state=client_ready;
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conn_info.last_hb_sent_time=0;
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conn_info.last_hb_recv_time=get_current_time();
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conn_info.last_oppsite_roller_time=conn_info.last_hb_recv_time;
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client_on_timer(conn_info);
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}
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if(data_len>=0&&type=='h')
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{
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mylog(log_debug,"[hb]heart beat received,oppsite_roller=%d\n",int(conn_info.oppsite_roller));
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conn_info.last_hb_recv_time=get_current_time();
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return 0;
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}
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else if(data_len>= int( sizeof(u32_t))&&type=='d')
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{
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mylog(log_trace,"received a data from fake tcp,len:%d\n",data_len);
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if(hb_mode==0)
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conn_info.last_hb_recv_time=get_current_time();
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//u32_t tmp_conv_id= ntohl(* ((u32_t *)&data[0]));
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u32_t tmp_conv_id;
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memcpy(&tmp_conv_id,&data[0],sizeof(tmp_conv_id));
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tmp_conv_id=ntohl(tmp_conv_id);
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if(!conn_info.blob->conv_manager.is_conv_used(tmp_conv_id))
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{
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mylog(log_info,"unknow conv %d,ignore\n",tmp_conv_id);
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return 0;
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}
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conn_info.blob->conv_manager.update_active_time(tmp_conv_id);
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u64_t u64=conn_info.blob->conv_manager.find_u64_by_conv(tmp_conv_id);
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sockaddr_in tmp_sockaddr={0};
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tmp_sockaddr.sin_family = AF_INET;
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tmp_sockaddr.sin_addr.s_addr=(u64>>32u);
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tmp_sockaddr.sin_port= htons(uint16_t((u64<<32u)>>32u));
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int ret=sendto(udp_fd,data+sizeof(u32_t),data_len -(sizeof(u32_t)),0,(struct sockaddr *)&tmp_sockaddr,sizeof(tmp_sockaddr));
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if(ret<0)
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{
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mylog(log_warn,"sento returned %d\n",ret);
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//perror("ret<0");
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}
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mylog(log_trace,"%s :%d\n",inet_ntoa(tmp_sockaddr.sin_addr),ntohs(tmp_sockaddr.sin_port));
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mylog(log_trace,"%d byte sent\n",ret);
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}
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else
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{
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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 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(source_ip_uint32==0)
|
|
{
|
|
mylog(log_info,"get_src_adress called\n");
|
|
if(retry_on_error==0)
|
|
{
|
|
if(get_src_adress(source_ip_uint32,remote_ip_uint32,remote_port)!=0)
|
|
{
|
|
mylog(log_fatal,"the trick to auto get source ip failed, maybe you dont have internet access\n");
|
|
myexit(-1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
int ok=0;
|
|
while(!ok)
|
|
{
|
|
if(get_src_adress(source_ip_uint32,remote_ip_uint32,remote_port)!=0)
|
|
{
|
|
mylog(log_warn,"the trick to auto get source ip failed, maybe you dont have internet access, retry in %d seconds\n",retry_on_error_interval);
|
|
sleep(retry_on_error_interval);
|
|
}
|
|
else
|
|
{
|
|
ok=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(bind_fd,local_ip_uint32,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,socket_buf_size,force_socket_buf);
|
|
|
|
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);
|
|
|
|
int fifo_fd=-1;
|
|
|
|
if(fifo_file[0]!=0)
|
|
{
|
|
fifo_fd=create_fifo(fifo_file);
|
|
ev.events = EPOLLIN;
|
|
ev.data.u64 = fifo_fd;
|
|
|
|
ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, fifo_fd, &ev);
|
|
if (ret!= 0) {
|
|
mylog(log_fatal,"add fifo_fd to epoll error %s\n",strerror(errno));
|
|
myexit(-1);
|
|
}
|
|
mylog(log_info,"fifo_file=%s\n",fifo_file);
|
|
}
|
|
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,continue\n");
|
|
//close(fifo_fd);
|
|
//myexit(0);
|
|
}
|
|
else
|
|
{
|
|
mylog(log_fatal,"epoll_wait return %d,%s\n", nfds,strerror(errno));
|
|
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)fifo_fd)
|
|
{
|
|
int len=read (fifo_fd, buf, sizeof (buf));
|
|
//assert(len>=0);
|
|
if(len<0)
|
|
{
|
|
mylog(log_warn,"fifo read failed len=%d,errno=%s\n",len,strerror(errno));
|
|
continue;
|
|
}
|
|
buf[len]=0;
|
|
while(len>=1&&buf[len-1]=='\n')
|
|
buf[len-1]=0;
|
|
mylog(log_info,"got data from fifo,len=%d,s=[%s]\n",len,buf);
|
|
if(strcmp(buf,"reconnect")==0)
|
|
{
|
|
mylog(log_info,"received command: reconnect\n");
|
|
conn_info.state.client_current_state=client_idle;
|
|
conn_info.my_id=get_true_random_number_nz();
|
|
}
|
|
else
|
|
{
|
|
mylog(log_info,"unknown command\n");
|
|
}
|
|
|
|
}
|
|
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+1, 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==max_data_len+1)
|
|
{
|
|
mylog(log_warn,"huge packet, data_len > %d,dropped\n",max_data_len);
|
|
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);
|
|
}
|
|
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 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[])
|
|
{
|
|
//printf("%llu\n",u64_t(-1));
|
|
//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_warn,"root check failed, it seems like you are using a non-root account. we can try to continue, but it may fail. If you want to run udp2raw as non-root, you have to add iptables rule manually, and grant udp2raw CAP_NET_RAW capability, check README.md in repo for more info.\n");
|
|
}
|
|
else
|
|
{
|
|
mylog(log_warn,"you can run udp2raw with non-root account for better security. check README.md in repo for more info.\n");
|
|
}
|
|
|
|
local_ip_uint32=inet_addr(local_ip);
|
|
source_ip_uint32=inet_addr(source_ip);
|
|
|
|
//strncpy(remote_ip,remote_address,sizeof(remote_ip)-1);
|
|
mylog(log_info,"remote_ip=[%s], make sure this is a vaild IP address\n",remote_ip);
|
|
strcpy(remote_ip,remote_address);
|
|
remote_ip_uint32=inet_addr(remote_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
|
|
{
|
|
mylog(log_fatal,"server mode not supported in portable version\n");
|
|
myexit(-1);
|
|
//server_event_loop();
|
|
}
|
|
|
|
return 0;
|
|
}
|