Lecture 4 summary of Java SE & Network Programming section 2
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1 presentation DAD Distributed Applications Development Cristian Toma Lecture 4 summary of Java SE & Network Programming section 2 D.I.C.E/D.E.I.C Department of Economic Informatics & Cybernetics
2 Cristian Toma Business Card
3 Agenda for Lecture 4 Recap Networking UDP & TCP Network Programming Exchange Ideas
4 Networking IP, UDP and TCP programming, TCP/IP state machine, SNMP, SMTP Networking Recapitulation
5 HOW TCP/IP Works: 1. Networking TCP/IP Stack
6 TCP/IP Stack Model: 1. Networking TCP/IP Stack
7 ISO/OSI Model vs. TCP/IP: 1. Networking TCP/IP Stack
8 TCP/IP Message Encapsulation: 1. Networking TCP/IP Stack
9 TCP/IP Message Flow: 1. Networking TCP/IP Stack
10 1. Networking TCP/IP Stack TCP/IP Virtual LAN/Networks:
11 TCP/IP App/Port Multiplexing: 1. Networking TCP/IP Stack
12 What is running on port 80? 1. Networking TCP/IP Stack
13 1. Networking TCP/IP Stack IP Header - RFC 791 Submasking + Routing + NAT:
14 1. Networking TCP/IP Stack UDP Header RFC 768 Connection-less vs. TCP Header RFC 793 Connection-oriented
15 TCP State Machine RFC 793: 1. Networking TCP/IP Stack
16 1. Networking TCP/IP Stack TCP/IP NAT & PAT:
17 1. Networking TCP/IP Stack TCP/IP NAT:
18 1. Networking TCP/IP Stack TCP/IP NAT:
19 1. Networking TCP/IP Stack TCP/IP NAT:
20 1. Networking TCP/IP Stack TCP/IP PAT:
21 TCP Handshake: 1.2 TCP/IP Networking Programming
22 Section Conclusion Fact: DAD needs Networking In few samples it is simple to remember: UDP and TCP programming is useful for HTC didactical samples: SNMP over UDP for monitoring, SMTP/IMAP4/POP3 over TCP for notification, FTP over TCP for file and data transfer, HTTP over TCP for web & web services, and in general TCP for RPC/RMI, CORBA, JMS, SOAP, P2P-JXTA for distributed computing and systems.
23 UDP Client-Server programming, SNMP client sample, TCP Client-Server programming, SMTP client sample Network UDP & TCP Programming
24 2.1 TCP/IP Networking Programming UDP Programming Socket Primitives: UDP Server socket() bind() recvfrom() sendto() close() Network Request Response UDP Client socket() - sento() recvfrom() close()
25 2.1 TCP/IP Networking Programming UDP Programming Socket Primitives:
26 2.1 TCP/IP Networking Programming UDP Programming Socket Primitives:
27 2.2 TCP/IP Networking Programming TCP Programming Socket Primitives: TCP Server Network TCP Client socket() bind() listen() accept() - read()/recv() write()/send() close() Establishing the connection / TCP Handshake Request Response socket() connect() write()/send() read()/recv() close()
28 2.2 TCP/IP Networking Programming TCP Programming Socket Primitives:
29 2.3 SNMP RFC 1157 What is the necessity for SNMP Simple? Network Management Protocol?
30 ASN.1 DER and BER: 2.3 SNMP RFC 1157
31 ASN.1 DER and BER: 2.3 SNMP RFC 1157
32 ASN.1 DER and BER: 2.3 SNMP RFC 1157
33 ASN.1 TLV: 2.3 SNMP RFC 1157
34 ASN.1 DER and BER: 2.3 SNMP RFC 1157
35 2.3 SNMP RFC 1157 ASN.1 OID:
36 2.3 SNMP RFC 1157 ASN.1 OID: ({iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-1(1) sha1-with-rsa-signature(5)})
37 ASN.1 OID: 2.3 SNMP RFC 1157
38 2.3 SNMP RFC 1157
39 2.3 SNMP RFC 1157
40 2.3 SNMP RFC 1157
41 2.3 SNMP RFC 1157
42 2.3 SNMP RFC 1157
43 2.4 SMTP RFC 2821
44 Base64 encoding is used in practice usually for transport over the network and heterogeneous environments binary code such as pictures or executable code. The techniques is very simple: to transform each 3 bytes values into 4 bytes value in order to avoid to obtain values greater then 127 per byte. For instance, if the scope is to encode the word Man into Base64 encoding then it is encoded as TWFu. Encoded in ASCII (in ISO , one value per byte), M, a, n are stored as the bytes 77 (0x4D), 97 (0x61), 110 (0x6E), which are , , in base SMTP RFC 2821
45 2.4 SMTP RFC 2821
46 2.4 SMTP RFC 2821
47 2.4 SMTP RFC 2821
48 Section Conclusions Java Network Programming uses for UDP: DatagramSocket and DatagramPacket classes on both server and client side. Java Network Programming uses for TCP: ServerSocket and Socket classes on server side. Only Socket class on client side. Java Network Programming for easy sharing For both server and client, it is necessary to create byte/char Input (socket.getinputstream()) and Output (socket.getoutputstream()) streams between the Random Access Memory RAM and the network communications channel. As practical approach, also developed in the laboratory activities, there is a need to implement raw SNMP request, but third party libraries snmp4j.org or product Naggios, Cacti, Zabbix may be used. As practical approach, there is a need to implement raw SMTP in order to send s, but Sun/Oracle or third party libraries may be used java.mail.*.
49 Network Programming & Java Sockets Communicate & Exchange Ideas
50 ? Questions & Answers! But wait There s More!
51 What s Your Message? Thanks! DAD Distributed Application Development End of Lecture 4 summary of Java SE & Network Programming section 2
presentation DAD Distributed Applications Development Cristian Toma
Lecture 5 S2 - Summary of Network Protocols Programming in JSE for Distributed Systems Section 2 presentation DAD Distributed Applications Development Cristian Toma D.I.C.E/D.E.I.C Department of Economic
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