networking

问题 I have developed an app using React-Native and I put that to Google Store also. But still there is an issue for some devices. Some devices cannot connect to the server while other devices are working fine. I have generated multiple APKs and uploaded to the store. Still the issue exists. I have put the code in android/app/build.gradle and I wonder all the device types are included. And should I generate the Universal APK too? splits { abi { reset() enable enableSeparateBuildPerCPUArchitecture

问题 I have developed an app using React-Native and I put that to Google Store also. But still there is an issue for some devices. Some devices cannot connect to the server while other devices are working fine. I have generated multiple APKs and uploaded to the store. Still the issue exists. I have put the code in android/app/build.gradle and I wonder all the device types are included. And should I generate the Universal APK too? splits { abi { reset() enable enableSeparateBuildPerCPUArchitecture

问题 How to get the IPv4 address from IPv4-mapped IPv6 addresses? For e.g I have an IP address ::FFFF:129.144.52.38 . from this, I need to extract 129.144.52.38 . Is there any API for this purpose? I can identify IPv6 or IPv4 address family by using the following function int getaddrfamily(const char *addr) { struct addrinfo hint, *info =0; memset(&hint, 0, sizeof(hint)); hint.ai_family = AF_UNSPEC; // Uncomment this to disable DNS lookup //hint.ai_flags = AI_NUMERICHOST; int ret = getaddrinfo

问题 I am using pun 2 and playfab. I did that every time you add a new friend it adds him to a playfab list, this is good because I can add a friend in any time, not like pun 2 but I can't see if friends are online and get the friends room name(photon option). the problem is that I convert from playfab to photon. is there a way to do it? here is my playfab code private void DisplayPlayfabFriends(List<PlayFab.ClientModels.FriendInfo> friendCache) { foreach (PlayFab.ClientModels.FriendInfo f in

问题 Let's say I have two network interfaces: eth0 with address 10.0.0.1 eth1 with address 192.168.0.1 Using route or ip route add I have set it to route: All addresses to eth0 1.2.3.4 only to eth1 So packets to 1.2.3.4 should be routed to eth1 , and everything else to eth0 . I then create a UDP socket and use bind() to set its local address to 192.168.0.1 . Then I send a packet to 1.2.3.4 . Will it be be sent over eth1 per the routing table or eth0 because it is bound to that IP address? I tried,

问题 I am struggling to group my network by the subgroups. I currently have the following network: Current Network Which I have assigned the subgroups. I would like to plot all of the subgroups clustered together. To get a graph that looks like this: Goal Most algorithms seems to cluster based on weights in the graph. But I want to tell it to cluster based on the node colors/labelled subgroups. This is what I have now to code this network: #Graph with Weighted matrix g_weighted<-graph.adjacency

问题 I am struggling to group my network by the subgroups. I currently have the following network: Current Network Which I have assigned the subgroups. I would like to plot all of the subgroups clustered together. To get a graph that looks like this: Goal Most algorithms seems to cluster based on weights in the graph. But I want to tell it to cluster based on the node colors/labelled subgroups. This is what I have now to code this network: #Graph with Weighted matrix g_weighted<-graph.adjacency

问题 I'm trying to send a specific packet size (100 bytes) with scapy but cant seem to get it. I'm using this to start. sr(IP(dst="192.168.1.1")/TCP(dport=443)) Looking at the docs / help I cant tell if I can use PacketLenField to specify the length of the packet. I can do it with NMAP & NSE but would like to do it outside of NMAP. Any ideas on this one? Thanks! 回答1: You can just add on the required number of bytes as a String when crafting the packet e.g.: payload = 'ZZZZZZZZZZZZZZZZZZZZZ' pkt =

问题 I'm trying to send a specific packet size (100 bytes) with scapy but cant seem to get it. I'm using this to start. sr(IP(dst="192.168.1.1")/TCP(dport=443)) Looking at the docs / help I cant tell if I can use PacketLenField to specify the length of the packet. I can do it with NMAP & NSE but would like to do it outside of NMAP. Any ideas on this one? Thanks! 回答1: You can just add on the required number of bytes as a String when crafting the packet e.g.: payload = 'ZZZZZZZZZZZZZZZZZZZZZ' pkt =

问题 Port 8888 is already bound on my (OS X 10.13.5) system, by a process running inside a docker container: $ netstat -an | grep 8888 tcp6 0 0 ::1.8888 *.* LISTEN tcp4 0 0 *.8888 *.* LISTEN A python program which tries to bind to that port (using as close to the socket options of golang as I can manage), fails in the way I expect: import socket import fcntl import os def main(): sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) flag = fcntl.fcntl(sock.fileno(), fcntl.F_GETFL) fcntl.fcntl