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code refactor for dns resolve; disabled it by default

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wangyu- 2018-06-05 11:26:55 -05:00
parent 2c2d897bc2
commit b0976dbee6
7 changed files with 51 additions and 23 deletions
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4
README.md
View File

@ -91,8 +91,8 @@ git version:6e1df4b39f build date:Oct 24 2017 09:21:15
repository: https://github.com/wangyu-/udp2raw-tunnel
usage:
run as client : ./this_program -c -l local_listen_ip:local_port -r remote_host:server_port [options]
run as server : ./this_program -s -l server_listen_ip:server_port -r remote_host:remote_port [options]
run as client : ./this_program -c -l local_listen_ip:local_port -r remote_address:server_port [options]
run as server : ./this_program -s -l server_listen_ip:server_port -r remote_address:remote_port [options]
common options,these options must be same on both side:
--raw-mode <string> avaliable values:faketcp(default),udp,icmp

2
common.h
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@ -89,6 +89,8 @@ typedef u64_t fd64_t;
const int max_data_len=1800;
const int buf_len=max_data_len+400;
const int max_address_len=512;
u64_t get_current_time();
u64_t pack_u64(u32_t a,u32_t b);

4
doc/README.zh-cn.md
View File

@ -119,8 +119,8 @@ git version:6e1df4b39f build date:Oct 24 2017 09:21:15
repository: https://github.com/wangyu-/udp2raw-tunnel
usage:
run as client : ./this_program -c -l local_listen_ip:local_port -r remote_host:server_port [options]
run as server : ./this_program -s -l server_listen_ip:server_port -r remote_host:remote_port [options]
run as client : ./this_program -c -l local_listen_ip:local_port -r remote_address:server_port [options]
run as server : ./this_program -s -l server_listen_ip:server_port -r remote_address:remote_port [options]
common options,these options must be same on both side:
--raw-mode <string> avaliable values:faketcp(default),udp,icmp

28
main.cpp
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@ -1073,7 +1073,7 @@ int client_event_loop()
{
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_host);
mylog(log_fatal,"auto detect lower-level info failed for %s,specific it manually\n",remote_ip);
myexit(-1);
}
}
@ -1084,7 +1084,7 @@ int client_event_loop()
{
if(find_lower_level_info(remote_ip_uint32,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_host,retry_on_error_interval);
mylog(log_warn,"auto detect lower-level info failed for %s,retry in %d seconds\n",remote_ip,retry_on_error_interval);
sleep(retry_on_error_interval);
}
else
@ -1758,19 +1758,33 @@ int main(int argc, char *argv[])
mylog(log_warn,"you can run udp2raw with non-root account for better security. check README.md in repo for more info.\n");
}
local_ip_uint32=inet_addr(local_ip);
source_ip_uint32=inet_addr(source_ip);
// if(enable_dns_resolve)
// {
#if ENABLE_DNS_RESOLVE
struct hostent *he;
if ( (he = gethostbyname(remote_host) ) == NULL ) {
mylog(log_error,"Unable to resolve hostname: %s\n",remote_host);
if ( (he = gethostbyname(remote_address) ) == NULL ) {
mylog(log_error,"Unable to resolve hostname: %s\n",remote_address);
exit(1); /* error */
}
struct in_addr **addr_list = (struct in_addr **)he->h_addr_list;
remote_ip_uint32=(*addr_list[0]).s_addr;
mylog(log_info,"%s ip = %s\n", program_mode==client_mode?"server":"remote", my_ntoa(remote_ip_uint32));
local_ip_uint32=inet_addr(local_ip);
source_ip_uint32=inet_addr(source_ip);
strcpy(remote_ip,my_ntoa(remote_ip_uint32));
#else
// }
// else
{
//strncpy(remote_ip,remote_address,sizeof(remote_ip)-1);
strcpy(remote_ip,remote_address);
remote_ip_uint32=inet_addr(remote_ip);
}
#endif
//current_time_rough=get_current_time();

2
makefile
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@ -8,7 +8,7 @@ cc_mips24kc_le=/toolchains/lede-sdk-17.01.2-ramips-mt7621_gcc-5.4.0_musl-1.1.16.
cc_arm= /toolchains/arm-2014.05/bin/arm-none-linux-gnueabi-g++
#cc_arm=/toolchains/lede-sdk-17.01.2-brcm2708-bcm2708_gcc-5.4.0_musl-1.1.16_eabi.Linux-x86_64/staging_dir/toolchain-arm_arm1176jzf-s+vfp_gcc-5.4.0_musl-1.1.16_eabi/bin/arm-openwrt-linux-muslgnueabi-g++
#cc_bcm2708=/home/wangyu/raspberry/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-g++
FLAGS= -std=c++11 -Wall -Wextra -Wno-unused-variable -Wno-unused-parameter -Wno-missing-field-initializers
FLAGS= -std=c++11 -Wall -Wextra -Wno-unused-variable -Wno-unused-parameter -Wno-missing-field-initializers ${OPT}
COMMON=main.cpp lib/md5.c encrypt.cpp log.cpp network.cpp common.cpp connection.cpp misc.cpp fd_manager.cpp -lpthread
SOURCES= $(COMMON) lib/aes_faster_c/aes.c lib/aes_faster_c/wrapper.c

27
misc.cpp
View File

@ -22,12 +22,15 @@ int max_rst_to_show=15;
int max_rst_allowed=-1;
int enable_dns_resolve=0;
fd_manager_t fd_manager;
char local_ip[100]="0.0.0.0", remote_host[100]="255.255.255.255",source_ip[100]="0.0.0.0";//local_ip is for -l option,remote_host for -r option,source for --source-ip
char remote_address[max_address_len]="";
char local_ip[100]="0.0.0.0", remote_ip[100]="255.255.255.255",source_ip[100]="0.0.0.0";//local_ip is for -l option,remote_ip for -r option,source for --source-ip
u32_t local_ip_uint32,remote_ip_uint32,source_ip_uint32;//convert from last line.
int local_port = -1, remote_port=-1,source_port=0;//similiar to local_ip remote_host,buf for port.source_port=0 indicates --source-port is not enabled
int local_port = -1, remote_port=-1,source_port=0;//similiar to local_ip remote_ip,buf for port.source_port=0 indicates --source-port is not enabled
int force_source_ip=0; //if --source-ip is enabled
@ -118,8 +121,8 @@ void print_help()
printf("repository: https://github.com/wangyu-/udp2raw-tunnel\n");
printf("\n");
printf("usage:\n");
printf(" run as client : ./this_program -c -l local_listen_ip:local_port -r server_host:server_port [options]\n");
printf(" run as server : ./this_program -s -l server_listen_ip:server_port -r remote_host:remote_port [options]\n");
printf(" run as client : ./this_program -c -l local_listen_ip:local_port -r server_address:server_port [options]\n");
printf(" run as server : ./this_program -s -l server_listen_ip:server_port -r remote_address:remote_port [options]\n");
printf("\n");
printf("common options,these options must be same on both side:\n");
printf(" --raw-mode <string> avaliable values:faketcp(default),udp,icmp\n");
@ -274,6 +277,7 @@ void process_arg(int argc, char *argv[]) //process all options
{"mtu-warn", required_argument, 0, 1},
{"max-rst-to-show", required_argument, 0, 1},
{"max-rst-allowed", required_argument, 0, 1},
{"dns-resolve", no_argument, 0, 1},
{NULL, 0, 0, 0}
};
@ -393,7 +397,7 @@ void process_arg(int argc, char *argv[]) //process all options
case 'r':
no_r = 0;
if (strchr(optarg, ':') != 0) {
sscanf(optarg, "%[^:]:%d", remote_host, &remote_port);
sscanf(optarg, "%[^:]:%d", remote_address, &remote_port);
if(remote_port==22)
{
mylog(log_fatal,"port 22 not allowed\n");
@ -646,6 +650,11 @@ void process_arg(int argc, char *argv[]) //process all options
assert(max_rst_allowed>=-1);
mylog(log_info,"max_rst_allowed=%d \n",max_rst_allowed);
}
else if(strcmp(long_options[option_index].name,"dns-resolve")==0)
{
enable_dns_resolve=1;
mylog(log_info,"dns-resolve enabled \n",max_rst_allowed);
}
else
{
mylog(log_warn,"ignored unknown long option ,option_index:%d code:<%x>\n",option_index, optopt);
@ -683,7 +692,7 @@ void process_arg(int argc, char *argv[]) //process all options
log_bare(log_info,"local_ip=%s ",local_ip);
log_bare(log_info,"local_port=%d ",local_port);
log_bare(log_info,"remote_host=%s ",remote_host);
log_bare(log_info,"remote_address=%s ",remote_address);
log_bare(log_info,"remote_port=%d ",remote_port);
log_bare(log_info,"source_ip=%s ",source_ip);
log_bare(log_info,"source_port=%d ",source_port);
@ -848,15 +857,15 @@ void iptables_rule() // handles -a -g --gen-add --keep-rule --clear --wait-loc
{
if(raw_mode==mode_faketcp)
{
sprintf(tmp_pattern,"-s %s/32 -p tcp -m tcp --sport %d",my_ntoa(remote_ip_uint32),remote_port);
sprintf(tmp_pattern,"-s %s/32 -p tcp -m tcp --sport %d",remote_ip,remote_port);
}
if(raw_mode==mode_udp)
{
sprintf(tmp_pattern,"-s %s/32 -p udp -m udp --sport %d",my_ntoa(remote_ip_uint32),remote_port);
sprintf(tmp_pattern,"-s %s/32 -p udp -m udp --sport %d",remote_ip,remote_port);
}
if(raw_mode==mode_icmp)
{
sprintf(tmp_pattern,"-s %s/32 -p icmp",my_ntoa(remote_ip_uint32));
sprintf(tmp_pattern,"-s %s/32 -p icmp",remote_ip);
}
pattern=tmp_pattern;
}

7
misc.h
View File

@ -20,6 +20,8 @@ extern int mtu_warn;
extern int max_rst_allowed;
extern int max_rst_to_show;
extern int enable_dns_resolve;
const u32_t max_handshake_conn_num=10000;
const u32_t max_ready_conn_num=1000;
@ -69,9 +71,10 @@ union current_state_t
client_current_state_t client_current_state;
};
extern char local_ip[100], remote_host[100],source_ip[100];//local_ip is for -l option,remote_host for -r option,source for --source-ip
extern char remote_address[max_address_len];
extern char local_ip[100], remote_ip[100],source_ip[100];//local_ip is for -l option,remote_ip for -r option,source for --source-ip
extern u32_t local_ip_uint32,remote_ip_uint32,source_ip_uint32;//convert from last line.
extern int local_port , remote_port,source_port;//similiar to local_ip remote_host,buf for port.source_port=0 indicates --source-port is not enabled
extern int local_port , remote_port,source_port;//similiar to local_ip remote_ip,buf for port.source_port=0 indicates --source-port is not enabled
extern int force_source_ip; //if --source-ip is enabled