?????????????????????????????????????????У??????????????????????????????????????????????У?????????????????????????????????????????????????????c++??python??????????????????????????????????????????????????????????????????????
?????????????????????????????????????????????????????????С?????????????????????????????????????????????ж???????????????????????С?????μ????????????????????????????4???д???
????????????????TCP/IP?й漲?????????????????????????CPU??????????????????????????????????????????????????????????????????????big endian?????????c++??python?У???4??????????????????????????????????????????￡?
????htons?? ??unsigned short??????????????????????
????htonl?? ??unsigned long??????????????????????
????ntohs?? ??unsigned short??????????????????????
????ntohl?? ??unsigned long??????????????????????
???????1) ?????little endian?????? ??Щ??????????????????? ; ?????big endian????????? ????4???????????????????????κ????????κ??????
????2) ??С?????У??????int??long????????????????????紫???в??????????????????
?????????????????????linux??windows????c++?????????????????python??????????????????????????????С???????
????1.linux + c++ ??????????????????????????????
????1 #include <arpa/inet.h>    //1.????arpa/inet.h
????2 #include <stdio.h>
????3 int main()
????4 {
????5     int port=6000;
????6     int netPort=htonl(port);
????7     printf("netPort=%d "??netPort);
????8     printf("hostPort=%d "??ntohl(netPort));
????9     return 1;
????10 }<br><br>output??<br>????netPort=1880555520<br>????hostPort=6000??
????2.windows + c++ ??????????????????????????????
????1 #include <stdio.h>
????2 #include <Winsock2.h>   //1.????<Winsock2.h>??
????3 #pragma comment( lib?? "ws2_32.lib")    //2.????ws2_32.lib??
????4 void main()
????5 {
????6     int port=6000;
????7     int netPort=htonl(port);
????8     printf("netPort=%d "??netPort);
????9     printf("hostPort=%d "??ntohl(netPort));
????10 }<br><br>output??<br>????netPort=1880555520<br>????hostPort=6000??
????3.python ??????????????????????????????????
????python?????????????????????????????????????????????????????????????????htons??htonl??ntohl??ntohs???????????????????struct????pack??unpack????????????struct????pack??unpack????????÷??????ο?????????￡?python??struct.pack()??????struct.unpack()????
????3.1 htons??htonl??ntohl??ntohs????????????????
????1 #!/usr/bin/python
????2 #coding=utf-8
????3 import socket
????4 port = 6000
????5 netPort = socket.htonl(port)
????6 hostPort = socket.ntohl(netPort)
????7 print"netPort:"?? netPort
????8 print"hostPort:"?? hostPort<br><br>output??<br>????netPort: 1880555520<br>????hostPort: 6000
????3.2 struct????pack??unpack???????????????????
????1 #!/usr/bin/python
????2 #coding=utf-8
????3 from struct import *
????4 port = 6000
????5 netPort = pack(">i"??port)  #?????htonl(port)???????pack????????????????
????6 hostPort = unpack(">i"??netPort)
????7 print "netPort:"??repr(netPort)
????8 print "hostPort:"??repr(hostPort[0])<br><br>output??<br>????netPort: 'x00x00x17p'<br>????hostPort: 6000
????????????????????е?????????????????????????????????????β????????????????????????????c++??????htonl????????????????