将C套接字程序转换为Python

Question

我一直在尝试把这个用C语言写的接收器代码转换成Python代码。
我用的Python代码似乎没有接收到任何东西。
发送方的C代码是这样的：

        sendto(sid,buffer,1023,0,(struct sockaddr *)&saddr,sizeof(saddr));

在把下面的代码转换成Python时，出现了什么问题呢？

        #include<stdio.h>
        #include<sys/types.h>
        #include<sys/socket.h>
        #include<netinet/in.h>
        #include<errno.h>
        #include<unistd.h>
        #include<stdlib.h>
        int main(char *argv[])
        {
        socklen_t sid,clen;
        char buffer[1024];
        struct sockaddr_in saddr,caddr;
        int n;
        sid=socket(AF_INET,SOCK_DGRAM,0);
        if(sid<0)
            perror("socket_create");
        bzero((char*)&saddr,sizeof(saddr));
        saddr.sin_family=AF_INET;
        saddr.sin_port=htons(12346);
        saddr.sin_addr.s_addr=INADDR_ANY;
        if(bind(sid,(struct sockaddr *)&saddr,sizeof(saddr))<0)
            perror("socket_bind");
        while(1)
        {
        clen=sizeof(caddr);
        bzero(buffer,1024);
        n=recvfrom(sid,buffer,1023,0,(struct sockaddr*)&caddr,&clen);
        if(n<0)
            perror("receive");
        printf("Array : %s\n", buffer);
        }
        close(sid);
        return 0;
        }

我尝试的Python代码是：

            import socket
            import sys
            from thread import *

            HOST = "127.0.0.1"   # Symbolic name meaning all available interfaces
            PORT = 12346 # Arbitrary non-privileged port

            s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            print 'Socket created'

            #Bind socket to local host and port
            try:
                s.bind((HOST, PORT))
            except socket.error , msg:
                print 'Bind failed. Error Code : ' + str(msg[0]) + ' Message ' + msg[1]
                sys.exit()

            print 'Socket bind complete'

            #Start listening on socket
            s.listen(10)
            print 'Socket now listening'

            #Function for handling connections. This will be used to create threads
            def clientthread(conn):
                #Sending message to connected client
                conn.send('Welcome to the server. Type something and hit enter\n') #send only takes string

                #infinite loop so that function do not terminate and thread do not end.
                while True:

                    #Receiving from client
                    data = conn.recv(1024)
                    reply = 'OK...' + data
                    if not data:
                        break

                    conn.sendall(reply)

                #came out of loop
                conn.close()

            #now keep talking with the client
            while 1:
                #wait to accept a connection - blocking call
                conn, addr = s.accept()
                print 'Connected with ' + addr[0] + ':' + str(addr[1])

                #start new thread takes 1st argument as a function name to be run, second is the tuple of arguments to the function.
                start_new_thread(clientthread ,(conn,))

            s.close()

c语言代码转换套接字编程网络通信调试技术

将C套接字程序转换为Python

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