发布于 2014-10-04 14:37:28 | 190 次阅读 | 评论: 0 | 来源: 网友投递
这里有新鲜出炉的Python3 Cookbook中文版，程序狗速度看过来！
Python编程语言
Python 是一种面向对象、解释型计算机程序设计语言，由Guido van Rossum于1989年底发明，第一个公开发行版发行于1991年。Python语法简洁而清晰，具有丰富和强大的类库。它常被昵称为胶水语言，它能够把用其他语言制作的各种模块（尤其是C/C++）很轻松地联结在一起。
本文是一个python实现的可以用来解析发到本地计算机数据包的示例代码,感兴趣的同学参考学习下.
tcp.py
system('title tcp sniffer')
system('color 05')
# the public network interface
HOST = socket.gethostbyname(socket.gethostname())
# create a raw socket and bind it to the public interface
s = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_IP)
s.bind((HOST, 0))
# Include IP headers
s.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1)
# receive all packages
#s.ioctl(socket.SIO_RCVALL, socket.RCVALL_ON)
# receive a package
while 1==1:
packet = s.recvfrom(65565)
packet = packet[0]
ip_header = packet[0:20]
iph = unpack('!BBHHHBBH4s4s',ip_header)
version = iph[0] >> 4 #Version
ihl = iph[0] * 0xF #IHL
iph_length = ihl * 4 #Total Length
ttl = iph[5]
protocol = iph[6]
s_addr = socket.inet_ntoa(iph[8])
d_addr = socket.inet_ntoa(iph[9])
print ctime()
print 'Version : ' + str(version) + ' IHL : ' + str(ihl) + ' Total Length: '+str(iph_length) + ' TTL : ' +str(ttl) + ' Protocol : ' + str(protocol) + ' Source Address : ' + str(s_addr) + ' Destination Address : ' + str(d_addr)
if protocol == 6:
tcp_header = packet[20:40]
tcph = unpack('!HHLLBBHHH' , tcp_header)
source_port = tcph[0]
dest_port = tcph[1]
sequence = tcph[2]
acknowledgement = tcph[3]
doff_reserved = tcph[4]
tcph_length = doff_reserved >> 4
print 'Source Port : ' + str(source_port) + ' Dest Port : ' + str(dest_port) + ' Sequence Number : ' + str(sequence) + ' Acknowledgement : ' + str(acknowledgement) + ' TCP header length : ' + str(tcph_length)
data = packet[40:len(packet)]
print 'Data : ' + data
# disabled promiscuous mode
s.ioctl(socket.SIO_RCVALL, socket.RCVALL_OFF)
udp.py
system('title udp sniffer')
system('color 05')
# the public network interface
HOST = socket.gethostbyname(socket.gethostname())
# create a raw socket and bind it to the public interface
s = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_IP)
s.bind((HOST, 0))
# Include IP headers
s.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1)
# receive all packages
#s.ioctl(socket.SIO_RCVALL, socket.RCVALL_ON)
# receive a package
while 1==1:
packet = s.recvfrom(65565)
packet = packet[0]
ip_header = packet[0:20]
iph = unpack('!BBHHHBBH4s4s',ip_header)
version = iph[0] >> 4 #Version
ihl = iph[0] * 0xF #IHL
iph_length = ihl * 4 #Total Length
ttl = iph[5]
protocol = iph[6]
s_addr = socket.inet_ntoa(iph[8])
d_addr = socket.inet_ntoa(iph[9])
if protocol == 17:
udp_header = packet[20:28]
udph = unpack('!HHHH' , udp_header)
source_port = udph[0]
dest_port = udph[1]
length = udph[2]
checksum = udph[3]
data = packet[28:len(packet)]
print ctime()
print 'Version : ' + str(version) + ' IHL : ' + str(ihl) + ' Total Length: '+str(iph_length) + ' TTL : ' +str(ttl) + ' Protocol : ' + str(protocol) + ' Source Address : ' + str(s_addr) + ' Destination Address : ' + str(d_addr)
print 'Source Port : ' + str(source_port) + ' Dest Port : ' + str(dest_port) + ' Length : ' + str(length) + ' Checksum : ' + str(checksum)
print 'Data : ' + data
# disabled promiscuous mode
s.ioctl(socket.SIO_RCVALL, socket.RCVALL_OFF)