github/wangyu-udp2raw
1
0
Fork 0
mirror of https://github.com/wangyu-/udp2raw.git synced 2025-10-14 09:55:33 +08:00
Code Issues Packages Projects Releases Wiki Activity

refactor

Browse Source
This commit is contained in:
wangyu-
2017-09-24 03:14:08 -05:00
parent f096a510b5
commit fc05e7f080
8 changed files with 294 additions and 288 deletions
Download Patch File Download Diff File Expand all files Collapse all files

184
misc.cpp
View File

@@ -18,11 +18,8 @@ int local_port = -1, remote_port=-1,source_port=0;//similiar to local_ip remote
int force_source_ip=0; //if --source-ip is enabled
id_t const_id=0;//an id used for connection recovery,its generated randomly,it never change since its generated
int udp_fd=-1; //for client only. client use this fd to listen and handle udp connection
int bind_fd=-1; //bind only,never send or recv. its just a dummy fd for bind,so that other program wont occupy the same port
int epollfd=-1; //fd for epoll
@@ -42,7 +39,21 @@ int debug_resend=0; // debug only
char key_string[1000]= "secret key";// -k option
string iptables_pattern="";
int iptables_rule_added=0;
int iptables_rule_keeped=0;
int iptables_rule_keep_index=0;
program_mode_t program_mode=unset_mode;//0 unset; 1client 2server
raw_mode_t raw_mode=mode_faketcp;
unordered_map<int, const char*> raw_mode_tostring = {{mode_faketcp, "faketcp"}, {mode_udp, "udp"}, {mode_icmp, "icmp"}};
int about_to_exit=0;
int socket_buf_size=1024*1024;
int force_socket_buf=0;
//char lower_level_arg[1000];
int process_lower_level_arg()//handle --lower-level option
@@ -974,3 +985,170 @@ int handle_lower_level(raw_info_t &raw_info)//fill lower_level info,when --lower
/*
int add_iptables_rule(const char * s)
{
iptables_pattern=s;
string rule="iptables -I INPUT ";
rule+=iptables_pattern;
rule+=" -j DROP";
char *output;
if(run_command(rule.c_str(),output)==0)
{
mylog(log_warn,"auto added iptables rule by: %s\n",rule.c_str());
}
else
{
mylog(log_fatal,"auto added iptables failed by: %s\n",rule.c_str());
//mylog(log_fatal,"reason : %s\n",strerror(errno));
myexit(-1);
}
iptables_rule_added=1;
return 0;
}*/
string chain[2];
string rule_keep[2];
string rule_keep_add[2];
string rule_keep_del[2];
u64_t keep_rule_last_time=0;
pthread_t keep_thread;
int keep_thread_running=0;
int iptables_gen_add(const char * s,u32_t const_id)
{
string dummy="";
iptables_pattern=s;
chain[0] =dummy+ "udp2rawDwrW_C";
rule_keep[0]=dummy+ iptables_pattern+" -j " +chain[0];
rule_keep_add[0]=dummy+"iptables -I INPUT "+rule_keep[0];
char *output;
run_command(dummy+"iptables -N "+chain[0],output,show_none);
run_command(dummy+"iptables -F "+chain[0],output);
run_command(dummy+"iptables -I "+chain[0] + " -j DROP",output);
rule_keep_del[0]=dummy+"iptables -D INPUT "+rule_keep[0];
run_command(rule_keep_del[0],output,show_none);
run_command(rule_keep_del[0],output,show_none);
if(run_command(rule_keep_add[0],output)!=0)
{
mylog(log_fatal,"auto added iptables failed by: %s\n",rule_keep_add[0].c_str());
myexit(-1);
}
return 0;
}
int iptables_rule_init(const char * s,u32_t const_id,int keep)
{
iptables_pattern=s;
iptables_rule_added=1;
iptables_rule_keeped=keep;
string dummy="";
char const_id_str[100];
sprintf(const_id_str, "%x", const_id);
chain[0] =dummy+ "udp2rawDwrW_"+const_id_str+"_C0";
chain[1] =dummy+ "udp2rawDwrW_"+const_id_str+"_C1";
rule_keep[0]=dummy+ iptables_pattern+" -j " +chain[0];
rule_keep[1]=dummy+ iptables_pattern+" -j " +chain[1];
rule_keep_add[0]=dummy+"iptables -I INPUT "+rule_keep[0];
rule_keep_add[1]=dummy+"iptables -I INPUT "+rule_keep[1];
rule_keep_del[0]=dummy+"iptables -D INPUT "+rule_keep[0];
rule_keep_del[1]=dummy+"iptables -D INPUT "+rule_keep[1];
keep_rule_last_time=get_current_time();
char *output;
for(int i=0;i<=iptables_rule_keeped;i++)
{
run_command(dummy+"iptables -N "+chain[i],output);
run_command(dummy+"iptables -F "+chain[i],output);
run_command(dummy+"iptables -I "+chain[i] + " -j DROP",output);
if(run_command(rule_keep_add[i],output)!=0)
{
mylog(log_fatal,"auto added iptables failed by: %s\n",rule_keep_add[i].c_str());
myexit(-1);
}
}
mylog(log_warn,"auto added iptables rules\n");
return 0;
}
int keep_iptables_rule() //magic to work on a machine without grep/iptables --check/-m commment
{
/*
if(iptables_rule_keeped==0) return 0;
uint64_t tmp_current_time=get_current_time();
if(tmp_current_time-keep_rule_last_time<=iptables_rule_keep_interval)
{
return 0;
}
else
{
keep_rule_last_time=tmp_current_time;
}*/
mylog(log_debug,"keep_iptables_rule begin %llu\n",get_current_time());
iptables_rule_keep_index+=1;
iptables_rule_keep_index%=2;
string dummy="";
char *output;
int i=iptables_rule_keep_index;
run_command(dummy + "iptables -N " + chain[i], output,show_none);
if (run_command(dummy + "iptables -F " + chain[i], output,show_none) != 0)
mylog(log_warn, "iptables -F failed %d\n",i);
if (run_command(dummy + "iptables -I " + chain[i] + " -j DROP",output,show_none) != 0)
mylog(log_warn, "iptables -I failed %d\n",i);
if (run_command(rule_keep_del[i], output,show_none) != 0)
mylog(log_warn, "rule_keep_del failed %d\n",i);
run_command(rule_keep_del[i], output,show_none); //do it twice,incase it fails for unknown random reason
if(run_command(rule_keep_add[i], output,show_log)!=0)
mylog(log_warn, "rule_keep_del failed %d\n",i);
mylog(log_debug,"keep_iptables_rule end %llu\n",get_current_time());
return 0;
}
int clear_iptables_rule()
{
char *output;
string dummy="";
if(!iptables_rule_added) return 0;
for(int i=0;i<=iptables_rule_keeped;i++ )
{
run_command(rule_keep_del[i],output);
run_command(dummy+"iptables -F "+chain[i],output);
run_command(dummy+"iptables -X "+chain[i],output);
}
return 0;
}
void signal_handler(int sig)
{
about_to_exit=1;
// myexit(0);
}