A/UX® Programmer's Reference Sections

icmp(SP)
*define ICMP UNREACH HOST 1
*define ICMP
-
UNREACH
-
PROTOCOL 2
*define ICMP
-
UNREACH
-
PORT 3
*define ICMP
-
UNREACH
-
NEEDFRAG 4
*define ICMP
-
UNREACH
-
SRCFAIL 5
*define ICMP_SOURCEQUENCH 4
*define ICMP REDIRECT 5
*define ICMP
-
REDIRECT
-
NET
*define ICMP REDIRECT HOST
- -
*define ICMP REDIRECT TOSNET
0
1
2
*define ICMP REDIRECT TOSHOST 3
*define ICMP ECHO 8
*define ICMP TIMXCEED 11
*define ICMP TIMXCEED INTRANS 0
*define ICMP TIMXCEED REASS 1
*define ICMP PARAMPROB 12
*define ICMP TSTAMP 13
*define ICMP TSTAMPREPLY 14
*define ICMP_IREQ 15
*define ICMP_IREQREPLY 16
icmp(5P)
Arriving ECHO and TST AMP packets cause the system to generate
ECHOREPL Y and TSTAMPREPL Y packets. IREQ packets
are not yet processed by the system, and are discarded. UN­
REACH, SOURCEQUENCH, TIMXCEED and PARAMPROB
packets are processed internally by the protocols implemented in
the system, or reflected to the user if a raw socket is being used;
see ip(5P). REDIRECT, ECHOREPLY, TSTAMPREPLY and
IREQREPL Y are also reflected to users of raw sockets. In addition,
REDIRECT messages cause the kernel routing tables to be
updated; see routing(5N).
SEE ALSO
inet(5F), ip(5P).
Internet Control Message Protocol, RFC792, J. Postel, USC-lSI
BUGS
IREQ messages are not processed properly: the address fields are
not set.
Messages which are source routed are not sent back using inverted
source routes, but rather go back through the normal routing
mechanisms.
February, 1990 2
Revision C