python 2.7 - Receiving data from Network C++ -


i have python function send data on network data gram socket.in receiver end have use c++ receive data receiver can't receive meaningful data.what should used string in exact format sent?

python code

def send(self, command):         segments = command.split() # split command on spaces         if len(segments) < 5 or segments[1] not in self.hosts or segments[2] not in self.hosts: # sanity check             print('invalid arguments')             return         else:             h1 = map(int, segments[1].split('.'))# segment 1 contains ip address             h2 = map(int, segments[2].split('.'))# segment 2 contains ip address             fmt = '4s4b4bh' + segments[3] + 's'# segemt 3 string length segment 4 string             buf = struct.pack(fmt, segments[0], h1[0], h1[1], h1[2], h1[3], h2[0], h2[1], h2[2], h2[3], int(segments[3]), ' '.join(segments[4:]))             print('sending {0}'.format(segments[1])) # print message before sending source             self.s.sendto(buf, (segments[1], self.port)) # send source             #self.s.sendto(command, (segments[1], self.port)) # send source

c++ code

bytes_received = recvfrom(sockfd, buffer, sizeof(buffer), 0, (struct sockaddr*) &client_address, &addrlen);         //print(buffer);         if(bytes_received==-1)         {             perror("recvfrom");             printf("error %s\n",strerror(errno));         }          printf("[%s:%hu]: %s \n", inet_ntoa(client_address.sin_addr), ntohs(client_address.sin_port), buffer);

all sockets created properly

if receive "send ???????" i'd expect encoding problems during sending. '?' 0x3f (dec 63) comes characters out of basic ascii (less 127) table. i'm not familiar python, can ensure use proper (e.g. utf-8, sure not utf-16/32 , perhaps not ascii) encoding while transforming python string byte array?


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