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自动命名af-unix本地数据报套接字?

datagram local bind sockets unix

5

JB. · 技术社区 · 16 年前

我正在通过Unix本地套接字(af_Unix地址系列,即 非UDP )服务器被绑定到一个公共地址,它可以接收请求。不幸的是,在回答问题时, sendto 除非客户端也被绑定,否则将失败。(常见的错误是 Transport endpoint is not connected )

绑定到某个随机名称(基于文件系统或抽象名称)可以工作。但我想避免:我是谁来保证我选的名字不会冲突?

Unix Sockets的流模式文档告诉我们将在 connect 如果他们还没有时间的话。这种特性是否适用于面向数据报的套接字?

4 回复 | 直到 16 年前

1

4

Robáµ© 16 年前

struct sockaddr_un me;
me.sun_family = AF_UNIX;
int result = bind(fd, (void*)&me, sizeof(short));

unix(7)

Linux source code

unix_bind

2

5

CapnBry 13 年前

unix(7)

struct sockaddr_un me;
const char name[] = "\0myabstractsocket";
me.sun_family = AF_UNIX;
// size-1 because abstract socket names are not null terminated
memcpy(me.sun_path, name, sizeof(name) - 1);
int result = bind(fd, (void*)&me, sizeof(me.sun_family) + sizeof(name) - 1);

3

1

sth 15 年前

SO_SOCKET man 7 unix SO_PASSCRED

4

-1

Nick Stinemates 16 年前

from socket import *
import time
class Listener:
    def __init__(self, port):
        self.port = port
        self.buffer = 102400

    def listen(self):

        sock = socket(AF_INET, SOCK_DGRAM)
        sock.bind(('', self.port))

        while 1:
            data, addr = sock.recvfrom(self.buffer)
            print "Received: " + data
            print "sending to %s" % addr[0]
            print "sending data %s" % data
            time.sleep(0.25)
            #print addr # will tell you what IP address the request came from and port
            sock.sendto(data, (addr[0], addr[1]))
            print "sent"
        sock.close()

if __name__ == "__main__":
    l = Listener(1975)
    l.listen()

from socket import *
from time import sleep
class Sender:
    def __init__(self, server):
       self.port = 1975
       self.server = server
       self.buffer = 102400

    def sendPacket(self, packet):
        sock = socket(AF_INET, SOCK_DGRAM)
        sock.settimeout(10.75)


        sock.sendto(packet, (self.server, int(self.port)))

        while 1:
            print "waiting for response"
            data, addr = sock.recvfrom(self.buffer)
            sock.close()
            return data



if __name__ == "__main__":
        s = Sender("127.0.0.1")
        response = s.sendPacket("Hello, world!")
        print response