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udp2raw/client.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"
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.c.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
address_t tmp_addr;
//u32_t new_ip=0;
if(!force_source_ip)
{
if(get_src_adress2(tmp_addr,remote_addr)!=0)
{
mylog(log_warn,"get_src_adress() failed\n");
return -1;
}
//source_addr=new_addr;
//source_addr.set_port(0);
mylog(log_info,"source_addr is now %s\n",tmp_addr.get_ip());
/*
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;
}*/
}
else
{
tmp_addr=source_addr;
}
send_info.new_src_ip.from_address_t(tmp_addr);
if (force_source_port == 0)
{
send_info.src_port = client_bind_to_a_new_port2(bind_fd,tmp_addr);
}
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.my_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.my_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 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(pre_recv_raw_packet()<0) return -1;
if(conn_info.state.client_current_state==client_idle )
{
discard_raw_packet();
//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.new_src_ip.equal(send_info.new_dst_ip)||recv_info.src_port!=send_info.dst_port)
{
mylog(log_debug,"unexpected adress %s %s %d %d\n",recv_info.new_src_ip.get_str1(),send_info.new_dst_ip.get_str2(),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.new_src_ip.equal(send_info.new_dst_ip)||recv_info.src_port!=send_info.dst_port)
{
mylog(log_debug,"unexpected adress %s %s %d %d\n",recv_info.new_src_ip.get_str1(),send_info.new_dst_ip.get_str2(),recv_info.src_port,send_info.dst_port);
return -1;
}
if(data_len<int( 3*sizeof(my_id_t)))
{
mylog(log_debug,"too short to be a handshake\n");
return -1;
}
//id_t tmp_oppsite_id= ntohl(* ((u32_t *)&data[0]));
my_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)]));
my_id_t tmp_my_id;
memcpy(&tmp_my_id,&data[sizeof(my_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]));
my_id_t tmp_oppsite_const_id;
memcpy(&tmp_oppsite_const_id,&data[sizeof(my_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.new_src_ip.equal(send_info.new_dst_ip)||recv_info.src_port!=send_info.dst_port)
{
mylog(log_warn,"unexpected adress %s %s %d %d,this shouldnt happen.\n",recv_info.new_src_ip.get_str1(),send_info.new_dst_ip.get_str2(),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.c.is_conv_used(tmp_conv_id))
{
mylog(log_info,"unknow conv %d,ignore\n",tmp_conv_id);
return 0;
}
conn_info.blob->conv_manager.c.update_active_time(tmp_conv_id);
//u64_t u64=conn_info.blob->conv_manager.c.find_data_by_conv(tmp_conv_id);
address_t tmp_addr=conn_info.blob->conv_manager.c.find_data_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_addr.inner,tmp_addr.get_len());
if(ret<0)
{
mylog(log_warn,"sento returned %d,%s,%02x,%s\n",ret,strerror(errno),int(tmp_addr.get_type()),tmp_addr.get_str());
//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 client_on_udp_recv(conn_info_t &conn_info)
{
int recv_len;
char buf[buf_len];
address_t::storage_t udp_new_addr_in={0};
socklen_t udp_new_addr_len = sizeof(address_t::storage_t);
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_warn,"recv_from error,%s\n",strerror(errno));
//myexit(1);
};
if(recv_len==max_data_len+1)
{
mylog(log_warn,"huge packet, data_len > %d,dropped\n",max_data_len);
return -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();
address_t tmp_addr;
tmp_addr.from_sockaddr((sockaddr *)&udp_new_addr_in,udp_new_addr_len);
//u64_t u64=((u64_t(udp_new_addr_in.sin_addr.s_addr))<<32u)+ntohs(udp_new_addr_in.sin_port);
u32_t conv;
//u64_t u64;//////todo
if(!conn_info.blob->conv_manager.c.is_data_used(tmp_addr))
{
if(conn_info.blob->conv_manager.c.get_size() >=max_conv_num)
{
mylog(log_warn,"ignored new udp connect bc max_conv_num exceed\n");
return -1;
}
conv=conn_info.blob->conv_manager.c.get_new_conv();
conn_info.blob->conv_manager.c.insert_conv(conv,tmp_addr);
mylog(log_info,"new packet from %s,conv_id=%x\n",tmp_addr.get_str(),conv);
}
else
{
conv=conn_info.blob->conv_manager.c.find_conv_by_data(tmp_addr);
}
conn_info.blob->conv_manager.c.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);
}
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,raw_send_fd,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;
assert(remote_addr.get_type()==AF_INET);
if(retry_on_error==0)
{
if(find_lower_level_info(remote_addr.inner.ipv4.sin_addr.s_addr,dest_ip,if_name_string,hw_string)!=0)
{
mylog(log_fatal,"auto detect lower-level info failed for %s,specific it manually\n",remote_addr.get_ip());
myexit(-1);
}
}
else
{
int ok=0;
while(!ok)
{
if(find_lower_level_info(remote_addr.inner.ipv4.sin_addr.s_addr,dest_ip,if_name_string,hw_string)!=0)
{
mylog(log_warn,"auto detect lower-level info failed for %s,retry in %d seconds\n",remote_addr.get_ip(),retry_on_error_interval);
sleep(retry_on_error_interval);
}
else
{
ok=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(),raw_send_fd,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");
}
}
/*
address_t new_addr;
if(!force_source_ip)
{
mylog(log_info,"get_src_adress called\n");
if(retry_on_error==0)
{
if(get_src_adress2(new_addr,remote_addr)!=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_adress2(new_addr,remote_addr)!=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;
}
}
}
}
else
{
new_addr=source_addr;
}
//in_addr tmp;
//tmp.s_addr=source_ip_uint32;
mylog(log_info,"source ip = %s\n",new_addr.get_ip());*/
//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=0;
memset(&send_info.new_src_ip,0,sizeof(send_info.new_src_ip));
int i, j, k;int ret;
//init_filter(source_port);
send_info.new_dst_ip.from_address_t(remote_addr);
send_info.dst_port=remote_addr.get_port();
//g_packet_info.src_ip=source_address_uint32;
//g_packet_info.src_port=source_port;
udp_fd=socket(local_addr.get_type(), SOCK_DGRAM, IPPROTO_UDP);
set_buf_size(udp_fd,socket_buf_size);
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 = local_addr.get_type();
//local_me.sin_addr.s_addr = local_addr.inner.ipv4.sin_addr.s_addr;
if (bind(udp_fd, (struct sockaddr*) &local_addr.inner, local_addr.get_len()) == -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 %s %d to %s %d\n",send_info.new_src_ip.get_str1(),send_info.src_port,send_info.new_dst_ip.get_str2(),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;
int unused=read(timer_fd, &value, 8);
client_on_timer(conn_info);
mylog(log_trace,"epoll_trigger_counter: %d \n",epoll_trigger_counter);
epoll_trigger_counter=0;
}
else if (events[idx].data.u64 == (u64_t)udp_fd)
{
client_on_udp_recv(conn_info);
}
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
{
mylog(log_fatal,"unknown fd,this should never happen\n");
myexit(-1);
}
}
}
return 0;
}
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