diff options
Diffstat (limited to 'man7/icmp.7')
-rw-r--r-- | man7/icmp.7 | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/man7/icmp.7 b/man7/icmp.7 index cd54614..3969fe2 100644 --- a/man7/icmp.7 +++ b/man7/icmp.7 @@ -5,7 +5,7 @@ .\" .\" $Id: icmp.7,v 1.6 2000/08/14 08:03:45 ak Exp $ .\" -.TH icmp 7 2023-07-15 "Linux man-pages 6.05.01" +.TH icmp 7 2023-10-31 "Linux man-pages 6.7" .SH NAME icmp \- Linux IPv4 ICMP kernel module. .SH DESCRIPTION @@ -16,7 +16,7 @@ The user doesn't interact directly with this module; instead it communicates with the other protocols in the kernel and these pass the ICMP errors to the application layers. The kernel ICMP module also answers ICMP requests. -.PP +.P A user protocol may receive ICMP packets for all local sockets by opening a raw socket with the protocol .BR IPPROTO_ICMP . @@ -28,7 +28,7 @@ The types of ICMP packets passed to the socket can be filtered using the socket option. ICMP packets are always processed by the kernel too, even when passed to a user socket. -.PP +.P Linux limits the rate of ICMP error packets to each destination. .B ICMP_REDIRECT and @@ -143,7 +143,7 @@ H Address Mask Request I Address Mask Reply .TE .RE -.PP +.P The bits marked with an asterisk are rate limited by default (see the default mask above). .TP @@ -163,7 +163,7 @@ means no group is allowed to create ICMP Echo sockets. Support for the .B ICMP_ADDRESS request was removed in Linux 2.2. -.PP +.P Support for .B ICMP_SOURCE_QUENCH was removed in Linux 2.2. @@ -173,18 +173,18 @@ As many other implementations don't support raw sockets, this feature should not be relied on in portable programs. .\" not really true ATM -.\" .PP +.\" .P .\" Linux ICMP should be compliant to RFC 1122. -.PP +.P .B ICMP_REDIRECT packets are not sent when Linux is not acting as a router. They are also accepted only from the old gateway defined in the routing table and the redirect routes are expired after some time. -.PP +.P The 64-bit timestamp returned by .B ICMP_TIMESTAMP is in milliseconds since the Epoch, 1970-01-01 00:00:00 +0000 (UTC). -.PP +.P Linux ICMP internally uses a raw socket to send ICMPs. This raw socket may appear in .BR netstat (8) @@ -192,5 +192,5 @@ output with a zero inode. .SH SEE ALSO .BR ip (7), .BR rdisc (8) -.PP +.P RFC\ 792 for a description of the ICMP protocol. |