snoopy(8) [plan9 man page]

SNOOPY(8)						      System Manager's Manual							 SNOOPY(8)

NAME

       snoopy - spy on Ethernet packets

SYNOPSIS

       snoopy [ -abceiltup9 ] [ -np ] [ -N count ]

DESCRIPTION

       Snoopy  displays  the  header  and  first  20  data bytes of packets received from the local Ethernet.  The packets displayed depend on the
       options chosen.	The following options each select packets from a particular protocol.  If more than one flag is given,	packets  from  all
       those protocols are displayed.

       a      ARP

       b      BOOTP

       c      ICMP

       e      all Ethernet packets

       i      IP

       l      IL

       t      TCP

       u      UDP

       By default all addresses are translated into system names.  The option n suppresses this.

       Snoopy runs in promiscuous mode by default, displaying all packets it can capture from the Ethernet.  The option p causes only packets sent
       to or from the system snoopy is running on to be displayed.

       Option 9 causes the data of TCP and IL messages to be interpreted and displayed as 9P messages.	The N option sets the count  (default  20)
       of the number of bytes to dump in hexadecimal from each packet.

FILES

       /net/ether
	      Ethernet device

SOURCE

       /sys/src/cmd/ip/snoopy.c

BUGS

       The CPU servers do not take well to running in promiscuous mode.  If run on them, snoopy may kill their Ethernets.

																	 SNOOPY(8)

IPCONFIG(8)						      System Manager's Manual						       IPCONFIG(8)

NAME

       ipconfig, arpd, rip - Internet configuration and routing

SYNOPSIS

       ip/ipconfig [-abp] [-e etherdev] [-m ip-mask] [ipaddr]

       ip/arpd [-pd] [-e etherdev] [-b bcast-addr]

       ip/rip [-b]

DESCRIPTION

       Ipconfig configures an Internet connection on an Ethernet.  The options are

       a      do not start arpd

       b      do not use BOOTP to discover a gateway address

       p      start arpd in promiscuous mode (see below)

       e      use the Ethernet mounted at /net/etherdev

       m      set the network mask to ip-mask

       If ipaddr is specified on the command line, use that instead of one found in the local database or via the BOOTP protocol.

       Arpd  performs the Internet Address Resolution Protocol, translating Internet addresses into Ethernet addresses.  It is normally started by
       ipconfig.  The options are

       d      print debugging to standard output

       p      (promiscuous) answer ARP requests for any recognized machine.  The default is to answer just for the machine running arpd.

       e      use the Ethernet mounted at /net/etherdev

       b      use the IP broadcast address bcast-addr instead of the correct one.

       Rip runs the routing protocol RIP.  It listens for RIP packets on connected networks and updates  the  kernel  routing  tables.	 The  only
       option, -b, broadcasts routing information onto the networks.

SOURCE

       /sys/src/cmd/ip/ipconfig.c
       /sys/src/cmd/ip/arpd.c
       /sys/src/cmd/ip/rip.c

SEE ALSO

       ndb(6)

																       IPCONFIG(8)