#include "common.h"
#include "network.h"
#include "connection.h"
#include "misc.h"
#include "log.h"
#include "lib/md5.h"
#include "encrypt.h"
#include "fd_manager.h"
char hb_buf[buf_len];
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);
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,remote_ip_uint32,remote_port)==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(bind_fd,local_ip_uint32);
}
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_send_seq=send_info.seq;
}
send_info.seq=raw_info.reserved_send_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.send_info.data_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.recv_info.data_len;
send_info.ts_ack=recv_info.ts;
raw_info.reserved_send_seq=send_info.seq;
}
send_info.seq=raw_info.reserved_send_seq;
send_handshake(raw_info,conn_info.my_id,conn_info.oppsite_id,const_id);
send_info.seq+=raw_info.send_info.data_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_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");
}
if(get_current_time()-conn_info.last_hb_sent_time<heartbeat_interval)
{
return 0;
}
mylog(log_debug,"heartbeat sent <%x,%x>\n",conn_info.oppsite_id,conn_info.my_id);
if(hb_mode==0)
send_safer(conn_info,'h',hb_buf,0);/////////////send
else
send_safer(conn_info,'h',hb_buf,hb_len);
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;
}
if(hb_mode==0)
send_safer(conn_info,'h',hb_buf,0); /////////////send
else
send_safer(conn_info,'h',hb_buf,hb_len);
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,oppsite_roller=%d\n",int(conn_info.oppsite_roller));
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);
if(hb_mode==0)
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 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;
}
}
else
{
recv(raw_recv_fd, 0,0,0);
}
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;
//conn_info.ip_port.ip=ip;
//conn_info.ip_port.port=port;
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;
}
return 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);
}
if(conn_info.state.server_current_state==server_idle)
{
recv(raw_recv_fd, 0,0, 0 );//
return 0;
}
mylog(log_fatal,"we should never run to here\n");
myexit(-1);
return -1;
}
/*
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.recv_info.data_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.recv_info.data_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);
if(hb_mode==0)
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,socket_buf_size,force_socket_buf);
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;
fd64_t new_udp_fd64 = fd_manager.create(new_udp_fd);
fd_manager.get_info(new_udp_fd64).p_conn_info=&conn_info;
mylog(log_trace, "[%s]u64: %lld\n",ip_port, new_udp_fd64);
ev.events = EPOLLIN;
ev.data.u64 = new_udp_fd64;
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_fd64);
//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);
}
fd64_t fd64 = 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 = fd_manager.to_fd(fd64);
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()
if(hb_mode==0)
send_safer(conn_info,'h',hb_buf,0);/////////////send
else
send_safer(conn_info,'h',hb_buf,hb_len);
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_fd64);
fd_manager.get_info(conn_info.timer_fd64).p_conn_info=&conn_info;
//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',hb_buf, hb_len);
//ori_conn_info.blob->anti_replay.re_init();
if(hb_mode==0)
send_safer(ori_conn_info,'h',hb_buf,0);/////////////send
else
send_safer(ori_conn_info,'h',hb_buf,hb_len);
ori_conn_info.last_hb_recv_time=get_current_time();
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 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,remote_ip_uint32,remote_port)!=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(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\n");
//close(fifo_fd);
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)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, 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);
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);
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 == (u64_t)fifo_fd)
{
int len=read (fifo_fd, buf, sizeof (buf));
if(len<0)
{
mylog(log_warn,"fifo read failed len=%d,errno=%s\n",len,strerror(errno));
continue;
}
//assert(len>=0);
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);
mylog(log_info,"unknown command\n");
}
else if (events[idx].data.u64>u32_t(-1) )
{
fd64_t fd64=events[idx].data.u64;
if(!fd_manager.exist(fd64))
{
mylog(log_trace ,"fd64 no longer exist\n");
continue;
}
assert(fd_manager.exist_info(fd64));
conn_info_t* p_conn_info=fd_manager.get_info(fd64).p_conn_info;
u32_t ip=p_conn_info->raw_info.send_info.dst_ip;
u32_t port=p_conn_info->raw_info.send_info.dst_port;
//assert(conn_manager.exist(ip,port));
///conn_info_t* p_conn_info=conn_manager.find_insert_p(ip,port);
if(fd64==p_conn_info->timer_fd64)//////////timer_fd64
{
if(debug_flag)begin_time=get_current_time();
//int fd=get_u64_l(events[idx].data.u64);
int fd=fd_manager.to_fd(fd64);
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//udp_fd64
{
//}
//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;
assert(conn_info.blob->conv_manager.is_u64_used(fd64));
u32_t conv_id=conn_info.blob->conv_manager.find_conv_by_u64(fd64);
int fd=fd_manager.to_fd(fd64);
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;
}
/*
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_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;
}