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Installing ns-3.37 and ns-3.35 in Ubuntu | Ubuntu 22.04 | NS3

Multiple Versions of ns3 in Ubuntu 22.04 In this post, we are going to install two versions of ns3 namely ns-3.35 and ns-3.37  My OS is : Ubuntu 22.04 LTS (Long Term Support) ns-3.35 uses waf and (./waf --run scratch/first)  ns-3.37 uses cmake  (./ns3 run scratch/first.cc) So we will install both the packages  Go through the video for complete instructions To start with  $ sudo apt update  $ sudo apt install build-essential autoconf automake libxmu-dev g++ python3 python3-dev pkg-config sqlite3 cmake python3-setuptools git qtbase5-dev qtchooser qt5-qmake qtbase5-dev-tools gir1.2-goocanvas-2.0 python3-gi python3-gi-cairo python3-pygraphviz gir1.2-gtk-3.0 ipython3 openmpi-bin openmpi-common openmpi-doc libopenmpi-dev autoconf cvs bzr unrar gsl-bin libgsl-dev libgslcblas0 wireshark tcpdump sqlite sqlite3 libsqlite3-dev  libxml2 libxml2-dev libc6-dev libc6-dev-i386 libclang-dev llvm-dev automake python3-pip libxml2 libxml2-dev libboost-all-dev  I have downloaded both the versions of ns3 fr

Sockets for Inter process communication

Socket programming interfaces provides communication via a network as well as locally on a single computer. Example is INET daemon which waits for incoming network service requests and then call the appropriate service program using the socket file descriptor as standard input and output.

Implementation of Unix domain sockets

  • Represented by a kernel data structure socket
  • Socket specific functions like Socket(), setsockout()
  • The functions are implemented with a single system call socketcall which calls all the necessary functions by reference to the first parameter. The file operation read(), write(), poll(), ioctl(), lseek(), close() are called directly
  • Operations of unix domain sockets
    • long sys_socket(int family, int type, int protocol);// creates a socket file descriptor
    • long sys_connect(int fd, struct sockaddr * uservaddr, int addrlen); //bind the socket to the unix domain address with specified length
    • long sys_listen(int fd, int backlog);//checks whether any connections are being accepted at the server address.
    • long sys_accept(int fd, struct sockaddr *upeer_sockaddr, int *upeer_addrlen));//server informs the kernel that the connections are being accepted from now on
    • long sys_getsockname(int fd, struct sockaddr *usockaddr, int *usockaddr_len); //the address bound to the socket is returned.
    • long sys_shutdown(int fd, int how); //to shutdown but status to be given that whether the sending and receiving still allowed
    • sending and receiving from the sockets
      • Messages can be sent either as a datagram or stream of bytes
      • long sys_send(int fd, void *buff, int len, unsigned flags);
      • long sys_sendmsg(int fd, struct msghdr *msg, unsigned int flags);
      • long sys_recv(int fd, void *buff, int len, unsigned flags);
      • long sys_recvmsg(int fd, struct msghdr *msg, unsigned int flags)

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