/*****************************************************************************
* I.MX6 Android iperf3 porting failed
* 说明:
* 本来想移植一下iperf3到Android系统上测试一下网卡，可能是版本高了点，最后
* 运行客户端的时候会报错，也找了一些解决办法，但还是未能解决。
*
* 2016-4-5 深圳 南山平山村 曾剑锋
****************************************************************************/
一、参考文档：
1. sys/fcntl.h : no such file while cross compiling pcsclite for Android?
http://stackoverflow.com/questions/12384353/sys-fcntl-h-no-such-file-while-cross-compiling-pcsclite-for-android
2. Iperf for Android-4.1 移植
http://blog.chinaunix.net/uid-24410388-id-3669153.html
3. unable to create a new stream: No such file or directory
https://github.com/esnet/iperf/issues/374
4. How to compile iperf3 for Windows
http://www.embeddedsystemtesting.com/2014/08/how-to-compile-iperf3-for-windows.html
二、download:
url: https://github.com/esnet/iperf
三、解决缺少头文件的问题：
由于直接编译Android shell程序的时候会出现缺少.h文件，于是先执行下面这行代码，貌似可以解决头文件的问题：
./configure --host=arm-none-linux-gnueabi CXX=arm-none-linux-gnueabi-g++ CXXFLAGS=-static CC=arm-none-linux-gnueabi-gcc CFLAGS=-static
四、get .c file
zengjf@zengjf:~/ipref/iperf-master/src$ ls -al *.c | awk '{print $9}' | sed -e "s/^/src\//" -e "s/$/\\\/"
src/cjson.c\
src/iperf_api.c\
src/iperf_client_api.c\
src/iperf_error.c\
src/iperf_locale.c\
src/iperf_sctp.c\
src/iperf_server_api.c\
src/iperf_tcp.c\
src/iperf_udp.c\
src/iperf_util.c\
src/main.c\
src/net.c\
src/tcp_info.c\
src/tcp_window_size.c\
src/timer.c\
src/t_timer.c\
src/t_units.c\
src/t_uuid.c\
src/units.c\
zengjf@zengjf:~/ipref/iperf-master/src$
五、compile for Android:
cat Android.mk
# external/i2c-tools/Android.mk
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES += \
src/cjson.c\
src/iperf_api.c\
src/iperf_client_api.c\
src/iperf_error.c\
src/iperf_locale.c\
src/iperf_sctp.c\
src/iperf_server_api.c\
src/iperf_tcp.c\
src/iperf_udp.c\
src/iperf_util.c\
src/main.c\
src/net.c\
src/tcp_info.c\
src/tcp_window_size.c\
src/timer.c\
src/units.c\
#src/t_timer.c\ # 这里有main函数，需要另外写可执行脚本
#src/t_units.c\ # 这里有main函数，需要另外写可执行脚本
#src/t_uuid.c\ # 这里有main函数，需要另外写可执行脚本
LOCAL_C_INCLUDES += \
$(LOCAL_PATH) \
$(LOCAL_PATH)/include \
$(LOCAL_PATH)/src
LOCAL_CFLAGS += -O2
LOCAL_CFLAGS += -DHAVE_CONFIG_H
LOCAL_LDLIBS += -lpthread
LOCAL_SHARED_LIBRARIES := libc libm libcutils libnetutils
LOCAL_MODULE := iperf
#LOCAL_FORCE_STATIC_EXECUTABLE := true
LOCAL_MODULE_PATH := $(TARGET_OUT_OPTIONAL_EXECUTABLES)
#LOCAL_UNSTRIPPED_PATH := $(TARGET_ROOT_OUT_UNSTRIPPED)
#LOCAL_MODULE_TAGS := eng user
include $(BUILD_EXECUTABLE)
六、编译结果：
......
target thumb C: iperf <= /home/zengjf/c_program/ipref/iperf-master/src/cjson.c
target Executable: iperf (out/target/product/sabresd_6dq/obj/EXECUTABLES/iperf_intermediates/LINKED/iperf)
target Symbolic: iperf (out/target/product/sabresd_6dq/symbols/system/xbin/iperf)
target Strip: iperf (out/target/product/sabresd_6dq/obj/EXECUTABLES/iperf_intermediates/iperf)
Install: out/target/product/sabresd_6dq/system/xbin/iperf
make: Leaving directory `/home/zengjf/myandroid'
zengjf@zengjf:~/myandroid$
七、执行效果：
1. root@android:/data/local # ./iperf
iperf3: parameter error - must either be a client (-c) or server (-s)
Usage: iperf [-s|-c host] [options]
iperf [-h|--help] [-v|--version]
Server or Client:
-p, --port # server port to listen on/connect to
-f, --format [kmgKMG] format to report: Kbits, Mbits, KBytes, MBytes
-i, --interval # seconds between periodic bandwidth reports
-F, --file name xmit/recv the specified file
-A, --affinity n/n,m set CPU affinity
-B, --bind <host> bind to a specific interface
-V, --verbose more detailed output
-J, --json output in JSON format
--logfile f send output to a log file
--forceflush force flushing output at every interval
-d, --debug emit debugging output
-v, --version show version information and quit
-h, --help show this message and quit
Server specific:
-s, --server run in server mode
-D, --daemon run the server as a daemon
-I, --pidfile file write PID file
-1, --one-off handle one client connection then exit
Client specific:
-c, --client <host> run in client mode, connecting to <host>
-u, --udp use UDP rather than TCP
-b, --bandwidth #[KMG][/#] target bandwidth in bits/sec (0 for unlimited)
(default 1 Mbit/sec for UDP, unlimited for TCP)
(optional slash and packet count for burst mode)
-t, --time # time in seconds to transmit for (default 10 secs)
-n, --bytes #[KMG] number of bytes to transmit (instead of -t)
-k, --blockcount #[KMG] number of blocks (packets) to transmit (instead of -t or -n)
-l, --len #[KMG] length of buffer to read or write
(default 128 KB for TCP, 8 KB for UDP)
--cport <port> bind to a specific client port (TCP and UDP, default: ephemeral port)
-P, --parallel # number of parallel client streams to run
-R, --reverse run in reverse mode (server sends, client receives)
-w, --window #[KMG] set window size / socket buffer size
-C, --congestion <algo> set TCP congestion control algorithm (Linux and FreeBSD only)
-M, --set-mss # set TCP/SCTP maximum segment size (MTU - 40 bytes)
-N, --no-delay set TCP/SCTP no delay, disabling Nagle's Algorithm
-4, --version4 only use IPv4
-6, --version6 only use IPv6
-S, --tos N set the IP 'type of service'
-L, --flowlabel N set the IPv6 flow label (only supported on Linux)
-Z, --zerocopy use a 'zero copy' method of sending data
-O, --omit N omit the first n seconds
-T, --title str prefix every output line with this string
--get-server-output get results from server
--udp-counters-64bit use 64-bit counters in UDP test packets
[KMG] indicates options that support a K/M/G suffix for kilo-, mega-, or giga-
iperf3 homepage at: http://software.es.net/iperf/
Report bugs to: https://github.com/esnet/iperf
1|root@android:/data/local #
2. root@android:/data/local # ./iperf -s &
[1] 13511
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
root@android:/data/local #
3. root@android:/data/local # ./iperf -c 127.0.0.1 -i 1 -w 1M
Connecting to host 127.0.0.1, port 5201
iperf3: error - unable to create a new stream: No such file or directory
Accepted connection from 127.0.0.1, port 49340
iperf3: the client has unexpectedly closed the connection
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
1|root@android:/data/local #
4. 最后这部分出现的问题，没找到解决办法，虽然参考文章里面有人说能解决，但我自己尝试那么做了，未解决。
