[英]Receiving data from Network C++
我有一個python函數通過數據報套接字在網絡上發送數據。在接收器端,我必須使用c ++接收該數據,但是接收器無法接收任何有意義的數據。應該使用什么來獲取字符串發送的確切格式?
Python代碼
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 a IP address
h2 = map(int, segments[2].split('.'))# segment 2 contains an IP address
fmt = '4s4B4Bh' + segments[3] + 's'# segemt 3 is string length segment 4 is a 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 to {0}'.format(segments[1])) # print a message before sending to source
self.s.sendto(buf, (segments[1], self.port)) # send to source
#self.s.sendto(command, (segments[1], self.port)) # send to source
C ++代碼
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);
所有套接字均已正確創建
如果收到類似“發送???????”的信息 我希望在發送過程中出現編碼問題。 '?' 是0x3F(dec 63),通常來自基本ASCII表(小於127)中的字符。 我不熟悉python,但是您可以確保在將python字符串轉換為字節數組時使用正確的編碼(例如UTF-8,確保不是UTF-16 / 32,也許不是ASCII)嗎?
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