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main.cpp
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#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 on_epoll_recv_event=0; //TODO, just a flag to help detect epoll infinite shoot
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(raw_info.disabled)
{
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\n");
}
if(conn_info.state.client_current_state==client_idle)
{
raw_info.rst_received=0;
raw_info.disabled=0;
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;
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;
//conn_info.ip_port.ip=ip;
//conn_info.ip_port.port=port;
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);