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 configuration 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 con‐
tained in the entry; if an item is missing, it is sought in the entries
for successively higher networks (described by ipnet entries) that con‐
tain 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 to
machines booting from the network. It listens for incoming 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 gener‐
ally writable. Normally tftpd uses the network directory /net, but
another can be specified 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 pathnames
SOURCE
/appl/cmd/ip/bootpd.b
/appl/cmd/ip/tftpd.b
SEE ALSOattrdb(2), ip(3), ndb(6), cs(8), dns(8)BOOTPD(8)
