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client.cpp
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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"
#ifdef UDP2RAW_MP
u32_t detect_interval=1500;
u64_t laste_detect_time=0;
int use_udp_for_detection=0;
int use_tcp_for_detection=1;
extern pcap_t *pcap_handle;
extern int pcap_captured_full_len;
#endif
int client_on_timer(conn_info_t &conn_info) //for client. called when a timer is ready in epoll
{
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);
#ifdef UDP2RAW_MP
//mylog(log_debug,"pcap cnt :%d\n",pcap_cnt);
if(send_with_pcap&&!pcap_header_captured)
{
if(get_current_time()-laste_detect_time>detect_interval)
{
laste_detect_time=get_current_time();
}
else
{
return 0;
}
/*
struct sockaddr_in remote_addr_in={0};
socklen_t slen = sizeof(sockaddr_in);
int port=get_true_random_number()%65534+1;
remote_addr_in.sin_family = AF_INET;
remote_addr_in.sin_port = htons(port);
remote_addr_in.sin_addr.s_addr = remote_ip_uint32;*/
int port=get_true_random_number()%65534+1;
address_t tmp_addr=remote_addr;
tmp_addr.set_port(port);
if(use_udp_for_detection)
{
int new_udp_fd=socket(tmp_addr.get_type(), SOCK_DGRAM, IPPROTO_UDP);
if(new_udp_fd<0)
{
mylog(log_warn,"create new_udp_fd error\n");
return -1;
}
setnonblocking(new_udp_fd);
u64_t tmp=get_true_random_number();
int ret=sendto(new_udp_fd,(char*)(&tmp),sizeof(tmp),0,(struct sockaddr *)&tmp_addr.inner,tmp_addr.get_len());
if(ret==-1)
{
mylog(log_warn,"sendto() failed\n");
}
sock_close(new_udp_fd);
}
if(use_tcp_for_detection)
{
static int last_tcp_fd=-1;
int new_tcp_fd=socket(tmp_addr.get_type(), SOCK_STREAM, IPPROTO_TCP);
if(new_tcp_fd<0)
{
mylog(log_warn,"create new_tcp_fd error\n");
return -1;
}
setnonblocking(new_tcp_fd);
connect(new_tcp_fd,(struct sockaddr *)&tmp_addr.inner,tmp_addr.get_len());
if(last_tcp_fd!=-1)
sock_close(last_tcp_fd);
last_tcp_fd=new_tcp_fd;
//close(new_tcp_fd);
}
mylog(log_info,"waiting for a use-able packet to be captured\n");
return 0;
}
#endif
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)
{
if(use_tcp_dummy_socket)
{
setnonblocking(bind_fd);
int ret=connect(bind_fd,(struct sockaddr *)&remote_addr.inner,remote_addr.get_len());
mylog(log_debug,"ret=%d,errno=%s, %d %s\n",ret,get_sock_error(),bind_fd,remote_addr.get_str());
//mylog(log_info,"ret=%d,errno=,%d %s\n",ret,bind_fd,remote_addr.get_str());
conn_info.state.client_current_state=client_tcp_handshake_dummy;
mylog(log_info,"state changed from client_idle to client_tcp_handshake_dummy\n");
}
else
{
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_tcp_handshake_dummy)
{
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_dummy\n");
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;
if(!use_tcp_dummy_socket)
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_hs2_or_ready(conn_info_t &conn_info,char type,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;
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;
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,get_sock_error(),int(tmp_addr.get_type()),tmp_addr.get_str());
//perror("ret<0");
}
}
else
{
mylog(log_warn,"unknown packet,this shouldnt happen.\n");
return -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);
#ifdef UDP2RAW_LINUX
if(pre_recv_raw_packet()<0) return -1;
#endif
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||conn_info.state.client_current_state==client_tcp_handshake_dummy)//received syn ack
{
assert(raw_mode==mode_faketcp);
if(recv_raw0(raw_info,data,data_len)<0)
{
return -1;
}
if(data_len>=max_data_len+1)
{
mylog(log_debug,"data_len=%d >= max_data_len+1,ignored",data_len);
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(conn_info.state.client_current_state==client_tcp_handshake)
{
if(recv_info.ack_seq!=send_info.seq+1)
{
mylog(log_debug,"seq ack_seq mis match\n");
return -1;
}
mylog(log_info,"state changed from client_tcp_handshake to client_handshake1\n");
}
else
{
send_info.seq=recv_info.ack_seq-1;
mylog(log_info,"state changed from client_tcp_dummy to client_handshake1\n");
//send_info.ack_seq=recv_info.seq+1;
}
conn_info.state.client_current_state = client_handshake1;
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;
}
my_id_t tmp_oppsite_id;
memcpy(&tmp_oppsite_id,&data[0],sizeof(tmp_oppsite_id));
tmp_oppsite_id=ntohl(tmp_oppsite_id);
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);
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);
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
{
vector<char> type_vec;
vector<string> data_vec;
recv_safer_multi(conn_info,type_vec,data_vec);
if(data_vec.empty())
{
mylog(log_debug,"recv_safer failed!\n");
return -1;
}
for(int i=0;i<(int)type_vec.size();i++)
{
char type=type_vec[i];
char *data=(char *)data_vec[i].c_str(); //be careful, do not append data to it
int data_len=data_vec[i].length();
client_on_raw_recv_hs2_or_ready(conn_info, type, data,data_len);
}
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_debug,"recv_from error,%s\n",get_sock_error());
return -1;
//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);
}
address_t tmp_addr;
tmp_addr.from_sockaddr((sockaddr *)&udp_new_addr_in,udp_new_addr_len);
u32_t conv;
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)
{
send_data_safer(conn_info,buf,recv_len,conv);
}
return 0;
}
void udp_accept_cb(struct ev_loop *loop, struct ev_io *watcher, int revents)
{
conn_info_t & conn_info= *((conn_info_t*)watcher->data);
client_on_udp_recv(conn_info);
}
void raw_recv_cb(struct ev_loop *loop, struct ev_io *watcher, int revents)
{
if(is_udp2raw_mp)assert(0==1);
conn_info_t & conn_info= *((conn_info_t*)watcher->data);
client_on_raw_recv(conn_info);
}
#ifdef UDP2RAW_MP
void async_cb(struct ev_loop *loop, struct ev_async *watcher, int revents)
{
conn_info_t & conn_info= *((conn_info_t*)watcher->data);
if(send_with_pcap&&!pcap_header_captured)
{
int empty=0;char *p;int len;
pthread_mutex_lock(&queue_mutex);
empty=my_queue.empty();
if(!empty)
{
my_queue.peek_front(p,len);
my_queue.pop_front();
}
pthread_mutex_unlock(&queue_mutex);
if(empty) return;
pcap_header_captured=1;
assert(pcap_link_header_len!=-1);
memcpy(pcap_header_buf,p,max_data_len);
log_bare(log_info,"link level header captured:\n");
unsigned char *tmp=(unsigned char*)pcap_header_buf;
pcap_captured_full_len=len;
for(int i=0;i<pcap_link_header_len;i++)
log_bare(log_info,"<%x>",(u32_t)tmp[i]);
log_bare(log_info,"\n");
return ;
}
//mylog(log_info,"async_cb called\n");
while(1)
{
int empty=0;char *p;int len;
pthread_mutex_lock(&queue_mutex);
empty=my_queue.empty();
if(!empty)
{
my_queue.peek_front(p,len);
my_queue.pop_front();
}
pthread_mutex_unlock(&queue_mutex);
if(empty) break;
if(g_fix_gro==0&&len>max_data_len)
{
mylog(log_warn,"huge packet %d > %d, dropped. maybe you need to turn down mtu at upper level, or maybe you need the --fix-gro option\n",len,max_data_len);
break;
}
int new_len=len-pcap_link_header_len;
memcpy(g_packet_buf,p+pcap_link_header_len,new_len);
g_packet_buf_len=new_len;
assert(g_packet_buf_cnt==0);
g_packet_buf_cnt++;
client_on_raw_recv(conn_info);
}
}
#endif
void clear_timer_cb(struct ev_loop *loop, struct ev_timer *watcher, int revents)
{
conn_info_t & conn_info= *((conn_info_t*)watcher->data);
client_on_timer(conn_info);
}
void fifo_cb(struct ev_loop *loop, struct ev_io *watcher, int revents)
{
conn_info_t & conn_info= *((conn_info_t*)watcher->data);
char buf[buf_len];
int fifo_fd=watcher->fd;
int len=read (fifo_fd, buf, sizeof (buf));
if(len<0)
{
mylog(log_warn,"fifo read failed len=%d,errno=%s\n",len,get_sock_error());
return;
}
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");
}
}
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;
#ifdef UDP2RAW_LINUX
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");
}
}
#endif
#ifdef UDP2RAW_MP
address_t tmp_addr;
if(get_src_adress2(tmp_addr,remote_addr)!=0)
{
mylog(log_error,"get_src_adress() failed\n");
myexit(-1);
}
if(strcmp(dev,"")==0)
{
mylog(log_info,"--dev have not been set, trying to detect automatically, available devices:\n");
mylog(log_info,"available device(device name: ip address ; description):\n");
char errbuf[PCAP_ERRBUF_SIZE];
int found=0;
pcap_if_t *interfaces,*d;
if(pcap_findalldevs(&interfaces,errbuf)==-1)
{
mylog(log_fatal,"error in pcap_findalldevs(),%s\n",errbuf);
myexit(-1);
}
for(pcap_if_t *d=interfaces; d!=NULL; d=d->next) {
log_bare(log_warn,"%s:", d->name);
int cnt=0;
for(pcap_addr_t *a=d->addresses; a!=NULL; a=a->next) {
if(a->addr==NULL)
{
log_bare(log_debug," [a->addr==NULL]");
continue;
}
if(a->addr->sa_family == AF_INET||a->addr->sa_family == AF_INET6)
{
cnt++;
if(a->addr->sa_family ==AF_INET)
{
char s[max_addr_len];
inet_ntop(AF_INET, &((struct sockaddr_in*)a->addr)->sin_addr, s,max_addr_len);
log_bare(log_warn," [%s]", s);
if(a->addr->sa_family==raw_ip_version)
{
if(((struct sockaddr_in*)a->addr)->sin_addr.s_addr ==tmp_addr.inner.ipv4.sin_addr.s_addr)
{
found++;
strcpy(dev,d->name);
}
}
}
else
{
assert(a->addr->sa_family ==AF_INET6);
char s[max_addr_len];
inet_ntop(AF_INET6, &((struct sockaddr_in6*)a->addr)->sin6_addr, s,max_addr_len);
log_bare(log_warn," [%s]", s);
if(a->addr->sa_family==raw_ip_version)
{
if( memcmp( &((struct sockaddr_in6*)a->addr)->sin6_addr,&tmp_addr.inner.ipv6.sin6_addr,sizeof(struct in6_addr))==0 )
{
found++;
strcpy(dev,d->name);
}
}
}
}
else
{
log_bare(log_debug," [unknow:%d]",int(a->addr->sa_family));
}
}
if(cnt==0) log_bare(log_warn," [no ip found]");
if(d->description==0)
{
log_bare(log_warn,"; (no description available)");
}
else
{
log_bare(log_warn,"; %s", d->description);
}
log_bare(log_warn,"\n");
}
if(found==0)
{
mylog(log_fatal,"no matched device found for ip: [%s]\n",tmp_addr.get_ip());
myexit(-1);
}
else if(found==1)
{
mylog(log_info,"using device:[%s], ip: [%s]\n",dev,tmp_addr.get_ip());
}
else
{
mylog(log_fatal,"more than one devices found for ip: [%s] , you need to use --dev manually\n",tmp_addr.get_ip());
myexit(-1);
}
}
else
{
mylog(log_info,"--dev has been manually set, using device:[%s]\n",dev);
}
#endif
send_info.src_port=0;
memset(&send_info.new_src_ip,0,sizeof(send_info.new_src_ip));
int i, j, k;int ret;
send_info.new_dst_ip.from_address_t(remote_addr);
send_info.dst_port=remote_addr.get_port();
udp_fd=socket(local_addr.get_type(), SOCK_DGRAM, IPPROTO_UDP);
set_buf_size(udp_fd,socket_buf_size);
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);
//}