BOOTPD(8) BOOTPD(8)
NAME
bootpd, tftpd - Internet booting
SYNOPSIS
ip/bootpd [ -dsq ] [ -f dbfile ] [ -x network ]
ip/tftpd [-dr] [ -p port ] [ -h homedir ] [ -x network ]
DESCRIPTION
Bootpd listens for Internet BOOTP requests and broadcasts a
suitable reply to each request that matches an entry in the
network database dbfile (default: /lib/ndb/local). The
BOOTP protocol is typically used by a remote system as it
boots, to obtain its Internet address and other configura-
tion data such as the addresses of servers (see for instance
the bootp file in ip(3)).
Dbfile is in ndb(6) format, as interpreted by attrdb(2).
Bootpd uses the following attributes:
auth authentication server name or address
bootf name of the client's boot file
dom fully-qualified domain name
ether hardware (MAC) address; only Ethernet is supported
fs file server name or address
ip client's Internet address
ipgw gateway from client's subnet (IP address)
ipmask subnet mask
ipnet network name
sys system name (client identifier)
Bootpd replies to an incoming request only if its hardware
address matches the value of the ether attribute of an entry
in dbfile . If found, the reply contains all the other
requested data that is contained in the entry; if an item is
missing, it is sought in the entries for successively higher
networks (described by ipnet entries) that contain the
requesting system's address. The `vendor specific' part of
the reply conveys the file server and authentication server
addresses to Inferno clients. Before answering a request,
bootpd rereads dbfile if it has changed since last read.
The -s option causes bootpd to sniff the network for BOOTP
traffic and print it, but not reply. The -d option prints
debugging information; giving it twice prints even more.
The -x option tells bootpd to use a network other than /net.
Currently bootpd prints a message to standard output each
time it replies; the -q option keeps it quiet.
Tftpd is mainly used to send kernels and configuration files
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BOOTPD(8) BOOTPD(8)
to machines booting from the network. It listens for incom-
ing TFTP file transfer requests on the given UDP port
(default: 69) and responds by sending or receiving a file as
requested. Homedir is the current directory for transfers,
/services/tftpd by default, and requests that use a relative
path name refer to files in or below that directory. If the
-r option is given, absolute path names are also restricted
to homedir. Tftpd runs as none (the least privileged user)
and can send only files with general read permission, or
write files that are generally writable. Normally tftpd
uses the network directory /net, but another can be speci-
fied with the -x option. The -d option prints a debugging
trace on standard output.
FILES
/lib/ndb/local network configuration file
/services/tftpd default directory for relative path-
names
SOURCE
/appl/cmd/ip/bootpd.b
/appl/cmd/ip/tftpd.b
SEE ALSO
attrdb(2), ip(3), ndb(6), cs(8), dns(8)
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