1. Networking in Embedded Linux
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2. What to Expect?
Networks Supported in Embedded Linux
Enhancing Network Support
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3. Networking Options
Embedded Linux supports most of the
networking options what PC Linux supports,
including
Wired (10/100/1000 Mbps)
Wireless (WEP, WPA-TKIP, WPA-PSK, …)
with various Network Hardware
Though, the drivers may need to be cross-
compiled
And Linux is well suited for networking apps
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4. Networking on Board
However, it finally depends on what all, the board
supports
Whether the hardware is there directly on the board
Or, Extensions through USB dongles
Or, Anything else
If not on the final product, it should be there on the
prototypes, and development boards
This makes the development activity highly productive
Though today, even Embedded Products are
expected to have many networking capabilities
Let's understand for use
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5. Enhancing Network Support
Assumption: Network support at hardware
level
Let's see the available network support at
the Embedded Applications level, and its
impact (what it enhances)
By available support, we mean
Cross-compilable
Installable on target's RFS
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6. Available Network Services
inetd – Internet super-server
Part of netkit (ftp://ftp.uk.linux.org/pub/linux/Networking/netkit)
SNMP – For Remote Administration
Download from http://net-snmp.sourceforge.net
telnet – Network login
telnetd – Part of netkit
utelnetd by Robert Schwebel of Pengutronix
ssh – Secure communications
Dropbear – Light weight OSS from http://matt.ucc.asn.au/dropbear/dropbear.html
http – Serving web content
Boa from http://www.boa.org
thttpd from http://www.acme.com/software/thttpd
Use PHP as a CGI Engine
dhcp – Dynamic configuration
Part of busybox as udhcp
And many more
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7. Generic Steps to setup Apps
Download Application Source, say src.tgz
gunzip & untar it: tar -zxvf src.tgz
Configure it
./configure --host=${TARGET} --prefix=$
{TARGET_PREFIX}
Build it: make
Install it: make install
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8. What all have we learnt?
Networks Supported in Embedded Linux
Wired
Wireless
Enhancing Network Support
By Networking Applications (Services)
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9. Any Queries?
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