Python-What';我的套接字代码有问题吗
我目前正在开发一个简单的Python程序,由于某些原因,它无法工作。Python-What';我的套接字代码有问题吗,python,sockets,networking,Python,Sockets,Networking,我目前正在开发一个简单的Python程序,由于某些原因,它无法工作。 完整程序的工作方式是,它有一个包含20个端口的列表,然后在该列表中循环,基本上在选定端口上ping主机。代码如下: import socket import sys print ' +-====================================================-+' print ' /
完整程序的工作方式是,它有一个包含20个端口的列表,然后在该列表中循环,基本上在选定端口上ping主机。代码如下:
import socket
import sys
print ' +-====================================================-+'
print ' / \ '
print '| PyPortScanner |'
print '| by Ag3ntChr0m |'
print ' \ /'
print ' +-====================================================-+'
print ''
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
except socket.error, msg:
print 'Failed to create socket. Error code: ' + str(msg[0]) + 'Error message: ' + msg[1]
sys.exit()
print 'Socket Created'
host = raw_input('Enter the desired host to scan: ')
port = [80, 443, 21, 22, 4567, 8080, 25, 3389, 23, 53, 1723, 110, 135, 445,
139, 1863, 143, 8081, 10000, 1025]
portFail = []
print 'Scanning top 20 most often open ports ...'
try:
remote_ip = socket.gethostbyname( host )
except socket.gaierror:
#couldn't resolve host at port
print 'Hostname could not be resolved. Program exiting'
sys.exit()
print 'IP address of ' + host + ' is ' + remote_ip
print '+-===================================-+'
print '| Ports Scanned:----------------------|'
print '+-===================================-+'
print ''
#Connect to remote server
for i in range(0, 20):
portScan = int(str(port[i])) <----
try:
s.connect((remote_ip, portScan))
print "\t" + str(portScan)
s.close()
except:
portFail.append(portScan)
err = True
raw_input('Press Enter to Continue...')
if err:
print '+-=============================-+'
print '| Failed Port Scan:-------------|'
print '+-=============================-+'
print ''
size = len(portFail)
for i in range(1, size):
print "\t" + str(portFail[i])
for portScan in port:
try:
print "scanning: %s" % portScan
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((remote_ip, portScan))
s.shutdown(socket.SHUT_RDWR)
except:
portFail.append(portScan)
err = True
finally:
s.close()
导入套接字
导入系统
打印“+-”=================================================================================================-+”
打印“/\”
打印“| PyPortScanner |”
按Ag3ntChr0m打印“|”
打印“\/”
打印“+-”=================================================================================================-+”
打印“
尝试:
s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
除socket.error外,消息:
“打印”无法创建套接字。错误代码:'+str(消息[0])+'错误消息:'+msg[1]
sys.exit()
打印“已创建套接字”
主机=原始输入('输入要扫描的所需主机:')
端口=[80443,21,224567,8080,253389,23,531723,110135445,
139, 1863, 143, 8081, 10000, 1025]
portFail=[]
打印“扫描前20个最常打开的端口…”
尝试:
远程ip=socket.gethostbyname(主机)
除socket.gai错误外:
#无法解析端口处的主机
无法解析“打印”主机名。程序退出'
sys.exit()
打印“+主机+”的IP地址为“+远程IP”
打印“+-”================================================================-+”
打印“|扫描端口:-------------------------|”
打印“+-”================================================================-+”
打印“
#连接到远程服务器
对于范围(0,20)内的i:
portScan=int(str(port[i]))您不能重复使用同一个套接字并再次连接。每次尝试制作一个新的套接字:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((remote_ip, portScan))
即使您关闭
一个插座,也不会将其放回可以重新连接的位置。正如@cnicutar的回答所述,您不能重复使用插座
。但是,在所有情况下使用套接字后都应该close()
socket,因为这将释放底层资源。这也可以在中的示例中看到
当您成功连接到端口时,应随后调用shutdown()
,以确保端口已关闭
以下是守则的相关部分:
import socket
import sys
print ' +-====================================================-+'
print ' / \ '
print '| PyPortScanner |'
print '| by Ag3ntChr0m |'
print ' \ /'
print ' +-====================================================-+'
print ''
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
except socket.error, msg:
print 'Failed to create socket. Error code: ' + str(msg[0]) + 'Error message: ' + msg[1]
sys.exit()
print 'Socket Created'
host = raw_input('Enter the desired host to scan: ')
port = [80, 443, 21, 22, 4567, 8080, 25, 3389, 23, 53, 1723, 110, 135, 445,
139, 1863, 143, 8081, 10000, 1025]
portFail = []
print 'Scanning top 20 most often open ports ...'
try:
remote_ip = socket.gethostbyname( host )
except socket.gaierror:
#couldn't resolve host at port
print 'Hostname could not be resolved. Program exiting'
sys.exit()
print 'IP address of ' + host + ' is ' + remote_ip
print '+-===================================-+'
print '| Ports Scanned:----------------------|'
print '+-===================================-+'
print ''
#Connect to remote server
for i in range(0, 20):
portScan = int(str(port[i])) <----
try:
s.connect((remote_ip, portScan))
print "\t" + str(portScan)
s.close()
except:
portFail.append(portScan)
err = True
raw_input('Press Enter to Continue...')
if err:
print '+-=============================-+'
print '| Failed Port Scan:-------------|'
print '+-=============================-+'
print ''
size = len(portFail)
for i in range(1, size):
print "\t" + str(portFail[i])
for portScan in port:
try:
print "scanning: %s" % portScan
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((remote_ip, portScan))
s.shutdown(socket.SHUT_RDWR)
except:
portFail.append(portScan)
err = True
finally:
s.close()
我还冒昧地简化了循环
注意:我的实验表明,shutdown()
不允许我重用套接字
正如@cnicutar所指出的,您不能重用套接字,但您始终可以为每个新连接启动一个新套接字。
您应该使用for循环来扫描端口,例如:
for p2scan in port:
try:
print "scanning: %s" % p2scan
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((remote_ip, p2scan))
except:
portFail.append(p2scan)
err = True
finally:
s.close()
close()
或shutdown()
会这样做吗?@user2176286在你写这篇评论的时候,你可以很容易地测试我发布的内容。我做了,它冻结了空闲和空闲的Python Shell…?谢谢!这似乎有效!尽管不要试图去追赶谷歌,但它会把它冻坏。