added target mips24kc_be

Update openvpn_guide.md

README.md

@@ -92,7 +92,7 @@ You can run udp2raw with a non-root account(for better security).Take a look at
 ### Usage
 ```
 udp2raw-tunnel
-version: Aug 26 2017 08:30:48
+git version:adbe7d110f    build date:Sep  6 2017 05:37:45
 repository: https://github.com/wangyu-/udp2raw-tunnel
 
 usage:
@@ -122,10 +122,14 @@ other options:
     --disable-bpf                         disable the kernel space filter,most time its not necessary
                                           unless you suspect there is a bug
     --sock-buf            <number>        buf size for socket,>=10 and <=10240,unit:kbyte,default:1024
-    --seqmode             <number>        seq increase mode for faketcp:
-                                          0:dont increase
-                                          1:increase every packet(default)
-                                          2:increase randomly, about every 3 packets
+    --force-sock-buf                      bypass system limitation while setting sock-buf
+    --seq-mode            <number>        seq increase mode for faketcp:
+                                          0:static header,do not increase seq and ack_seq
+                                          1:increase seq for every packet,simply ack last seq
+                                          2:increase seq randomly, about every 3 packets,simply ack last seq
+                                          3:simulate an almost real seq/ack procedure(default)
+                                          4:similiar to 3,but do not consider TCP Option Window_Scale,
+                                          maybe useful when firewall doesnt support TCP Option 
     --lower-level         <string>        send packets at OSI level 2, format:'if_name#dest_mac_adress'
                                           ie:'eth0#00:23:45:67:89:b9'.or try '--lower-level auto' to obtain
                                           the parameter automatically,specify it manually if 'auto' failed

doc/README.zh-cn.md

@@ -93,7 +93,7 @@ udp2raw可以用非root账号运行，这样更安全。具体方法见：[#26](
 ### 命令选项
 ```
 udp2raw-tunnel
-version: Aug 26 2017 08:30:48
+git version:adbe7d110f    build date:Sep  6 2017 05:37:45
 repository: https://github.com/wangyu-/udp2raw-tunnel
 
 usage:
@@ -123,10 +123,14 @@ other options:
     --disable-bpf                         disable the kernel space filter,most time its not necessary
                                           unless you suspect there is a bug
     --sock-buf            <number>        buf size for socket,>=10 and <=10240,unit:kbyte,default:1024
-    --seqmode             <number>        seq increase mode for faketcp:
-                                          0:dont increase
-                                          1:increase every packet(default)
-                                          2:increase randomly, about every 3 packets
+    --force-sock-buf                      bypass system limitation while setting sock-buf
+    --seq-mode            <number>        seq increase mode for faketcp:
+                                          0:static header,do not increase seq and ack_seq
+                                          1:increase seq for every packet,simply ack last seq
+                                          2:increase seq randomly, about every 3 packets,simply ack last seq
+                                          3:simulate an almost real seq/ack procedure(default)
+                                          4:similiar to 3,but do not consider TCP Option Window_Scale,
+                                          maybe useful when firewall doesnt support TCP Option 
     --lower-level         <string>        send packets at OSI level 2, format:'if_name#dest_mac_adress'
                                           ie:'eth0#00:23:45:67:89:b9'.or try '--lower-level auto' to obtain
                                           the parameter automatically,specify it manually if 'auto' failed

doc/openvpn_guide.md

@@ -11,7 +11,7 @@
 #### run at client side
 assume server ip is 45.66.77.88
 ```
-./udp2raw_amd64 -s -l0.0.0.0:3333 -r 45.66.77.88:8855 -k "passwd" --raw-mode faketcp -a
+./udp2raw_amd64 -c -l0.0.0.0:3333 -r 45.66.77.88:8855 -k "passwd" --raw-mode faketcp -a
 ```
 
 #### hint

main.cpp

@@ -2621,7 +2621,7 @@ void print_help()
 //	printf("\n");
 	printf("    --sock-buf            <number>        buf size for socket,>=10 and <=10240,unit:kbyte,default:1024\n");
 	printf("    --force-sock-buf                      bypass system limitation while setting sock-buf\n");
-	printf("    --seqmode             <number>        seq increase mode for faketcp:\n");
+	printf("    --seq-mode            <number>        seq increase mode for faketcp:\n");
 	printf("                                          0:static header,do not increase seq and ack_seq\n");
 	printf("                                          1:increase seq for every packet,simply ack last seq\n");
 	printf("                                          2:increase seq randomly, about every 3 packets,simply ack last seq\n");

makefile

@@ -1,6 +1,8 @@
 cc_cross=/home/wangyu/Desktop/arm-2014.05/bin/arm-none-linux-gnueabi-g++
 cc_local=g++
-cc_mips34kc=/toolchains/OpenWrt-SDK-ar71xx-for-linux-x86_64-gcc-4.8-linaro_uClibc-0.9.33.2/staging_dir/toolchain-mips_34kc_gcc-4.8-linaro_uClibc-0.9.33.2/bin/mips-openwrt-linux-g++
+#cc_mips34kc=/toolchains/OpenWrt-SDK-ar71xx-for-linux-x86_64-gcc-4.8-linaro_uClibc-0.9.33.2/staging_dir/toolchain-mips_34kc_gcc-4.8-linaro_uClibc-0.9.33.2/bin/mips-openwrt-linux-g++
+cc_mips24kc_be=/toolchains/lede-sdk-17.01.2-ar71xx-generic_gcc-5.4.0_musl-1.1.16.Linux-x86_64/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.16/bin/mips-openwrt-linux-musl-g++
+cc_mips24kc_le=/toolchains/lede-sdk-17.01.2-ramips-mt7621_gcc-5.4.0_musl-1.1.16.Linux-x86_64/staging_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/bin/mipsel-openwrt-linux-musl-g++
 #cc_arm= /toolchains/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-g++ -march=armv6 -marm 
 cc_arm= /toolchains/arm-2014.05/bin/arm-none-linux-gnueabi-g++
 #cc_bcm2708=/home/wangyu/raspberry/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-g++ 
@@ -10,7 +12,7 @@ SOURCES=main.cpp lib/aes.c lib/md5.c encrypt.cpp log.cpp network.cpp common.cpp
 SOURCES_AES_ACC=$(filter-out lib/aes.c,$(SOURCES)) $(wildcard lib/aes_acc/aes*.c)
 
 NAME=udp2raw
-TARGETS=amd64 mips34kc arm amd64_hw_aes arm_asm_aes mips34kc_asm_aes x86 x86_asm_aes
+TARGETS=amd64 arm amd64_hw_aes arm_asm_aes mips24kc_be mips24kc_be_asm_aes x86 x86_asm_aes mips24kc_le mips24kc_le_asm_aes
 TAR=${NAME}_binaries.tar.gz `echo ${TARGETS}|sed -r 's/([^ ]+)/udp2raw_\1/g'`
 
 all:git_version
@@ -26,11 +28,15 @@ debug2: git_version
 	rm -f ${NAME}
 	${cc_local}   -o ${NAME}          -I. ${SOURCES} ${FLAGS} -lrt -Wformat-nonliteral -ggdb
 
-mips34kc: git_version
-	${cc_mips34kc}  -o ${NAME}_$@   -I. ${SOURCES} ${FLAGS} -lrt -lgcc_eh -static -O3
+mips24kc_be: git_version
+	${cc_mips24kc_be}  -o ${NAME}_$@   -I. ${SOURCES} ${FLAGS} -lrt -lgcc_eh -static -O3
+mips24kc_be_asm_aes: git_version
+	${cc_mips24kc_be}  -o ${NAME}_$@   -I. ${SOURCES_AES_ACC} ${FLAGS} -lrt -lgcc_eh -static -O3 lib/aes_acc/asm/mips_be.S
 
-mips34kc_asm_aes: git_version
-	${cc_mips34kc}  -o ${NAME}_$@   -I. ${SOURCES_AES_ACC} ${FLAGS} -lrt -lgcc_eh -static -O3 lib/aes_acc/asm/mips_be.S
+mips24kc_le: git_version
+	${cc_mips24kc_le}  -o ${NAME}_$@   -I. ${SOURCES} ${FLAGS} -lrt -lgcc_eh -static -O3
+mips24kc_le_asm_aes: git_version
+	${cc_mips24kc_le}  -o ${NAME}_$@   -I. ${SOURCES_AES_ACC} ${FLAGS} -lrt -lgcc_eh -static -O3 lib/aes_acc/asm/mips.S
 
 #bcm2708:
 #	${cc_bcm2708} -o ${NAME}_bcm2708  -I. ${SOURCES} ${FLAGS} -lrt -static -O3

network.cpp

@@ -1687,12 +1687,12 @@ int after_send_raw0(raw_info_t &raw_info)
 				{
 					send_info.seq=raw_info.recv_info.ack_seq;
 				}
-				if(recv_info.ack_seq_counter>=3)
+				if(recv_info.ack_seq_counter>=3) //simulate tcp fast re-transmit
 				{
 					recv_info.ack_seq_counter=0;
 					send_info.seq=raw_info.recv_info.ack_seq;
 				}
-				if(larger_than_u32(raw_info.recv_info.ack_seq,send_info.seq))  //for further use,currently not useful.
+				if(larger_than_u32(raw_info.recv_info.ack_seq,send_info.seq))  //for further use,currently no effect.
 				{
 					send_info.seq=raw_info.recv_info.ack_seq;
 				}