来回unix域套接字锁 我写了两个程序,一个是C++,另一个是Python程序,用UNIX域套接字进行通信。我想做的是C++代码发送一个数字到Python代码,然后再发送另一个数字返回到C++。这一直持续到C++代码耗尽发送的数量,执行停止。下面是我的代码。我似乎无法让它们通过循环的第一次迭代
我首先运行Python:来回unix域套接字锁 我写了两个程序,一个是C++,另一个是Python程序,用UNIX域套接字进行通信。我想做的是C++代码发送一个数字到Python代码,然后再发送另一个数字返回到C++。这一直持续到C++代码耗尽发送的数量,执行停止。下面是我的代码。我似乎无法让它们通过循环的第一次迭代,python,c++,sockets,unix-socket,python-sockets,Python,C++,Sockets,Unix Socket,Python Sockets,我首先运行Python: python code.py/tmp/1/tmp/2 然后运行C++代码: /代码/tmp/1/tmp/2 以下是输出: C++输出: 已发送0 倾听 连接成功 收到5份 已发送1个 倾听 Python输出: 倾听…… 收到(0,) >5 已发送5个 倾听…… C++代码: 在这种方法中我做错了什么?我需要使用线程吗 谢谢< p>您在C++代码中处理发送和接收套接字的方式不同:发送套接字在程序开始时被绑定一次,而接收套接字在每次迭代中接受新连接。 当前的Python
python code.py/tmp/1/tmp/2
然后运行C++代码:
/代码/tmp/1/tmp/2
倾听
连接成功
收到5份
已发送1个
倾听
Python输出: 倾听……
收到(0,)
>5
已发送5个
倾听……
C++代码: 在这种方法中我做错了什么?我需要使用线程吗
谢谢
< p>您在C++代码中处理发送和接收套接字的方式不同:发送套接字在程序开始时被绑定一次,而接收套接字在每次迭代中接受新连接。 当前的Python实现在recv\u socket
上接受一个新连接,并在每次迭代时连接send\u socket
,这解释了您所面临的问题
最有效的修复方法是在循环之前连接每个套接字一次,除非您有充分的理由在每次迭代时打开一个新连接。以下是相应的代码清单:
C++
static int connFd;
int main(int argc, char* argv[])
{
int recv_sock,
send_sock;
struct sockaddr_un server, client;
///////////////////////////////////////////
//
// setup send
//
///////////////////////////////////////////
/* Create socket on which to send. */
send_sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (send_sock < 0)
{
perror("opening unix socket");
exit(1);
}
/* Construct name of socket to send to. */
client.sun_family = AF_UNIX;
strcpy(client.sun_path, argv[1]);
if (connect(send_sock, (struct sockaddr *) &client, sizeof(struct sockaddr_un)) < 0)
{
close(send_sock);
perror("connecting stream socket");
exit(1);
}
///////////////////////////////////////////
//
// setup recv
//
///////////////////////////////////////////
recv_sock = socket(AF_UNIX, SOCK_STREAM, 0);
if(recv_sock< 0)
{
cerr << "Cannot open socket" << endl;
return 0;
}
bzero((char*) &server, sizeof(server));
server.sun_family = AF_UNIX;
strcpy(server.sun_path, argv[2]);
//bind socket
if(bind(recv_sock, (struct sockaddr *)&server, sizeof(server)) < 0)
{
cerr << "Cannot bind" << endl;
return 0;
}
listen(recv_sock, 10);
int X;
for (int i = 0; i < 10; i++)
{
write(send_sock, &i, sizeof(i));
cout << "sent " << i << endl;
cout << "Listening" << endl;
connFd = accept(recv_sock, 0, 0);
if (connFd < 0)
{
cerr << "Cannot accept connection" << endl;
return 0;
}
else
{
cout << "Connection successful" << endl;
read(connFd, &X, sizeof(X));
cout << "received " << X << endl;
}
usleep(2000000);
}
close(send_sock);
close(recv_sock);
unlink(argv[2]);
unlink(argv[1]);
return 0;
}
import socket,os,struct, glob, sys
import random
send_socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
recv_socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
try:
os.remove(sys.argv[1])
except OSError:
pass
recv_socket.bind(sys.argv[1])
recv_socket.listen(10)
while 1:
print "listening ..."
conn, addr = recv_socket.accept()
data = conn.recv(4)
p = struct.unpack('i',data)
print 'received ', p
if p is '9':
break
l = int(raw_input(">"))
a = struct.pack('i', l)
send_socket.connect(sys.argv[2])
send_socket.sendall(a)
print 'sent ', l
send_socket.close()
conn.close()
recv_socket.close()
static int connFd;
int main(int argc, char *argv[]) {
int recv_sock, send_sock;
struct sockaddr_un server, client;
///////////////////////////////////////////
//
// setup send
//
///////////////////////////////////////////
/* Create socket on which to send. */
send_sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (send_sock < 0) {
perror("opening unix socket");
exit(1);
}
/* Construct name of socket to send to. */
client.sun_family = AF_UNIX;
strcpy(client.sun_path, argv[1]);
if (connect(send_sock, (struct sockaddr *)&client,
sizeof(struct sockaddr_un)) < 0) {
close(send_sock);
perror("connecting stream socket");
exit(1);
}
///////////////////////////////////////////
//
// setup recv
//
///////////////////////////////////////////
recv_sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (recv_sock < 0) {
cerr << "Cannot open socket" << endl;
return 0;
}
bzero((char *)&server, sizeof(server));
server.sun_family = AF_UNIX;
strcpy(server.sun_path, argv[2]);
// bind socket
if (::bind(recv_sock, (struct sockaddr *)&server, sizeof(server)) < 0) {
cerr << "Cannot bind" << endl;
return 0;
}
listen(recv_sock, 10);
connFd = accept(recv_sock, 0, 0);
if (connFd < 0) {
cerr << "Cannot accept connection" << endl;
return 0;
} else {
cout << "Connection successful" << endl;
}
int X;
for (int i = 0; i < 10; i++) {
write(send_sock, &i, sizeof(i));
cout << "sent " << i << endl;
cout << "Listening" << endl;
read(connFd, &X, sizeof(X));
cout << "received " << X << endl;
usleep(2000000);
}
close(send_sock);
close(recv_sock);
unlink(argv[2]);
unlink(argv[1]);
return 0;
}
recv_socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
send_socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
try:
os.remove(sys.argv[1])
except OSError:
pass
recv_socket.bind(sys.argv[1])
recv_socket.listen(10)
conn, addr = recv_socket.accept()
send_socket.connect(sys.argv[2])
while 1:
print "listening ..."
data = conn.recv(4)
p = struct.unpack('i',data)
print 'received ', p
if p is '9':
break
l = int(raw_input(">"))
a = struct.pack('i', l)
send_socket.sendall(a)
print 'sent ', l
send_socket.close()
conn.close()
recv_socket.close()