Linux Socket Programming by Example - Warren Gay
CloseLinux Socket Programming by Example
   Table of Contents
  OpenPreface>
   I: Basic Socket Concepts
  Open1. Introducing Sockets
  Open2. Domains and Address Families
  Open3. Address Conversion Functions
  Open4. Socket Types and Protocols
  Open5. Binding Addresses to a Socket
  Open6. Connectionless-Oriented Protocols
  Open7. Connection-Oriented Protocols for Clients
  Open8. Connection-Oriented Protocols for Servers
  Open9. Hostname and Network Name Lookups
   II: Advanced Socket Programming
  Open10. Using Standard I/O on Sockets
  Open11. Concurrent Client Servers
  Open12. Socket Options
  Open13. Broadcasting with UDP
  Open14. Out-of-Band Data
  Open15. Using the inetd Daemon
  Close16. Network Security Programming
    Defining Security
    The Challenges of Security
    Identifying Friend or Foe
    Securing inetd Servers
    Installing Wrapper and Server Programs
    Introducing the Client Program
    Installing and Testing the Wrapper
   What's Next
  Open17. Passing Credentials and File Descriptors
  Open18. A Practical Network Project
   Appendixes
  OpenA. Socket Function Quick Reference
  OpenB. Socket-Related Structures Reference
   C. Useful Network Tables
   glossary
   Index
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What's Next

This chapter has given you a working knowledge of the TCP wrapper concept. Applying the wrapper concept, you can now use it on servers that you write to provide your system with greater network security. You have also learned that it has a weakness in the datagram case, which requires special consideration.

In the next chapter, you will be introduced to one more security-related concept. There, you will learn how to receive credentials from a PF_UNIX/PF_LOCAL socket. Additionally, you will learn how a server can open a file on your behalf and pass the opened file descriptor to you, by means of a PF_UNIX/PF_LOCAL socket.
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