iNet | 易学教程

Omnet++/Inet: how to adjust routing files when adding components to a .NED scenario

阅读更多关于 Omnet++/Inet: how to adjust routing files when adding components to a .NED scenario

问题 For an exam we are studying LISP Mobile (Locator/Identifier Separation Protocol) and we have asked to some researchers from a German University to send us their LISP simulator with Omnet++/Inet. Inside, we have found the following scenario which is very useful to us: where we have a lispMobileNode multihomed with two wlan interfaces which receives UDP packets (in particular VoIP or video) from a correspondent node which is not mobile called standardHost. This scenario works perfectly as

Transfer PDF file to ftp server in MS access 2007

阅读更多关于 Transfer PDF file to ftp server in MS access 2007

问题 I'm attempting to upload a pdf file to an ftp server. I've tried this by accessing the wininet dll but unsuccessfully. What is the best way to do this in MS Access 2007 VB6? I can call a .net dll, but that is my last resort. Thank you in advance. 回答1: If you mean VB6 then there's a control you can use for FTP functions. Go to Project/Components and add the "Microsoft Internet Transfer Control" to your project. It's fairly easy to use, but something like... Inet.UserName = "Username" Inet

How to extend different Modules of Inet with custom messages?

阅读更多关于 How to extend different Modules of Inet with custom messages?

问题 I have all the examples up and running for the INET (AODV) simulation. My network comprises of number of AODV Router hosts. My next task is to exchange some custom massages regarding each host's current position (which will be updated after a certain time through Mobility). All the examples I found (normally) are of tictoc which is asking me to build a simpleModule in a .cc file and then use that module in the .ned file. I want to use the AODVRouter module to exchange these messages (as it

OMNET++: How to obtain wireless signal power?

阅读更多关于 OMNET++: How to obtain wireless signal power?

问题 I am using the newly released INET 4.0 framework for OMNET++ and I would like to obtain the received signal strength value in a wireless host (of type AdhocHost). How may I do that? 回答1: In INET 4.0.0 the packet received by a module contains several tags. Between others there is SignalPowerInd tag. According to SignalTag.msg: This indication specifies the average analog signal power that was detected during receiving the packet. It may be present on a packet from the phyiscal layer to the

Changing model parameters by cPar in other module

阅读更多关于 Changing model parameters by cPar in other module

问题 I am using this module hierarchy : Node: {udpApp[0]<->udp<->networkLayer->wlan[0]} and wlan[0]: {CNPCBeacon<->mac<->radio} I have given some initial parameter in the ini file for udpApp as : **.host*.numUdpApps = 2 **.host*.udpApp[0].typename = "UDPBasicApp" **.host*.udpApp[0].chooseDestAddrMode = "perBurst" **.host*.udpApp[0].destAddresses = "gw1" **.host*.udpApp[0].startTime = 1.32s **.host*.udpApp[0].stopTime = 1.48s But at run time I want to change the startTime and stopTime for udpAPP[0]

How to Send a broadcast packet in application layer in INET

阅读更多关于 How to Send a broadcast packet in application layer in INET

问题 I use INET 3.6 in Omnet 5.1.1. I have done this structure which has been mentioned in bellow link successfully. https://stackoverflow.com/a/36647631/6640504 Then,I have made simple module in (inet --> application --> base) and added its NED file to node. But I could not send any packet to other nodes. Would you please guide me how to send or receive broadcast packets in Application layer without using udpapp or tcpapp? Thank you in advance. 回答1: To be able to send broadcast packets in omnet,

Try to create new project with INET reference, got : “unexpected NAME, expecting $end” in .msg file

阅读更多关于 Try to create new project with INET reference, got : “unexpected NAME, expecting $end” in .msg file

问题 I created a project which contains my linklayer and simulation source code. This project has INET as the project reference. At build time, I got this error: Error: syntax error, unexpected NAME, expecting $end It comes from the message file (which contains types of messages): import inet.common.INETDefs; My message file is very similar to the Bmac message file (also tried with Bmac, got the same error). Any idea please? 回答1: INET 4.X uses a new version of message compiler. But OMNeT++ by

Calculate power consumption to see if the node dies

阅读更多关于 Calculate power consumption to see if the node dies

问题 I am using Omnet++ and Inet 3.4.0 and I am trying to simulate power consumption and make the node dead after it's energy gets over. I tried IdealEnergySource model and SimpleEnergyStorage. but I could not figure out where to keep the parameter of the energy source. I tried in SimpleEnergyStorage.cc but could not find. Than you in advance 回答1: The Wireless08 tutorial from INET uses IdealEnergyStorage which has an infinite amount of energy. Therefore in that case a node will never be dead. To

linux网络编程二十：socket选项：SO_RCVTIMEO和SO_SNDTIMEO

阅读更多关于 linux网络编程二十：socket选项：SO_RCVTIMEO和SO_SNDTIMEO

SO_RCVTIMEO和SO_SNDTIMEO ，它们分别用来设置socket接收数据超时时间和发送数据超时时间。因此，这两个选项仅对与数据收发相关的系统调用有效，这些系统调用包括：send, sendmsg, recv, recvmsg, accept, connect 。这两个选项设置后，若超时，返回-1，并设置errno为EAGAIN或EWOULDBLOCK. 其中connect超时的话，也是返回-1, 但errno设置为EINPROGRESS 1. 代码：设置connect超时时间 #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <errno.h> #include <assert.h> #include <fcntl.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> //超时连接 int timeout_connect(const char *ip, int port, int time); int main(int argc, char **argv) { if (argc != 3) {

Netlink implementation for the Android NDK

阅读更多关于 Netlink implementation for the Android NDK

问题 I have a requirement for similar task as mentioned in this link.. Passive monitoring of sockets in Android. One way is parsing the /proc/net/{tcp,udp,...} tables. But we have to keep on reading continuously for keep on monitoring; which is not efficient way. As it will be a mobile device app, it will eat up the battery as it requires CPU Time for keep on monitoring for time interval (say 1 sec). But, I am looking for an event based approach. As I googled about the same, I ended with NETLINK