struct.pack

python: integer out of range for 'L' format code

由 左心房为你撑大大i 提交于 2019-12-24 08:56:14
问题 In python, the code is the following envimsg = struct.pack("!LHL", 1, 0, int(jsonmsg["flow_id"], 16)) + \ struct.pack("!HQH", 1, int(flow["src id"],16), 0) + \ struct.pack("!HQH", 1, int(flow["dst id"],16), int(flow["dst port"],16)) + \ struct.pack("!H", 0) + \ struct.pack("!HHHLL", int(jsonmsg["app_src_port"],10), int(jsonmsg["app_dst_port"],10), int(jsonmsg["app_proto"],10), int(jsonmsg["app_src_ip"],10), int(jsonmsg["app_dst_ip"],10)) at the line struct.pack("!H", 0) + \ I encounter this

python struct pack double

由 妖精的绣舞 提交于 2019-12-11 12:54:37
问题 I want to convert -123.456 into a C double for network transmission in python. So I tried this: struct.pack('d', -123.456) I get this as a result: 'w\xbe\x9f\x1a/\xdd^\xc0' Obviously there is some hex in there, but what is with the w, /, and ^ sprinkled in there? 回答1: They are, respectively, a "w", "/", and "^". Some byte sequences do correspond to ASCII characters. 来源： https://stackoverflow.com/questions/2008871/python-struct-pack-double

Getting IP address of the beagleboard using python

由 断了今生、忘了曾经 提交于 2019-12-10 10:42:55
问题 SIOCGIFADDR = 0x8915 def getIpAddr(iface = 'eth0'): ifreq = struct.pack('16sH14s', iface, socket.AF_INET, '\x00'*14) try: res = fcntl.ioctl(sock, SIOCGIFADDR, ifreq) except: return None ip = struct.unpack('16sH2x4s8x', res)[2] return socket.inet_ntoa(ip) At each step what are the return values of the functions? And, what is SIOCGIFADDR? Also, why [2] has been used following the unpack() function? 回答1: SIOCGIFADDR : is stands for get internet interface address means 'eth0'. This is CPU macro

Sending Login Packet to Minecraft Server in Python Not Working

由 半腔热情 提交于 2019-12-06 09:23:16
问题 I have the following script in Python. What it does is tries to connect to a MineCraft server, first by sending a 'handshake', then sending a login request. The protocol specs can be found here: http://wiki.vg/Protocol Anyway, the python script works fine, and there are no errors. However, I'm fairly use I encoded the second packet wrong, as when it is sent, nothing appears on the server console. The player isn't connected or anything. It just eventually times out and closes the connection

Sending Login Packet to Minecraft Server in Python Not Working

由 只愿长相守 提交于 2019-12-04 12:27:13
I have the following script in Python. What it does is tries to connect to a MineCraft server, first by sending a 'handshake', then sending a login request. The protocol specs can be found here: http://wiki.vg/Protocol Anyway, the python script works fine, and there are no errors. However, I'm fairly use I encoded the second packet wrong, as when it is sent, nothing appears on the server console. The player isn't connected or anything. It just eventually times out and closes the connection due to the 'client' not logging in in time. Basically, anyway who has experience with struct.pack()
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