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.\" t
.\" Don't change the first line, it tells man that we need tbl.
.\" This man page is Copyright (C) 1999 Andi Kleen .
.\" İȨ redcandle, Laser www.linuxforum.net 2000
.\" Permission is granted to distribute possibly modified copies
.\" of this page provided the header is included verbatim,
.\" and in case of nontrivial modification author and date
.\" of the modification is added to the header.
.\" Please send bug reports, corrections and suggestions for improvements to
.\"
.\" $Id: raw.7,v 1.1.1.1 2000/12/27 12:24:48 BitBIRD Exp $
.\" ĹģıݿĶ
.TH RAW 7 "2 Oct 1998" "Linux ֲҳ" "Linux Աֲ"
.SH
raw, SOCK_RAW \- Linux IPv4 raw socket.
.SH
#include <sys/socket.h>
.br
#include <netinet/in.h>
.br
raw_socket = socket(PF_INET, SOCK_RAW, int protocol );
.SH
Raw sockets ʹû˿ʵµ IPv4 Э顣
raw socket 豸ջͲӲ㱨ͷԭʼݰ
ֻмӿѡ IP_HDRINCL ʱ IPv4 Żڴ
IP ͷҵʱб뺬 IP ͷк
IP ͷܱա
ֻ user id Ϊ 0 CAP_NET_RAW ܴ
raw sockets.
ƥΪ raw socket Эŵİ
͵ socket.Ҫ쿴ɵЭб
ο RFC1700 Ĵź getprotobyname (3).
IPPROTO_RAW ζ IP_HDRINCL ڼ״̬ҲζŽ
IP Э. Dz͡
.TS
tab(:) allbox;
c s
l l.
IP_HDRINCL ڴʱ IP ͷ
IP Checksum: д롣
Source Address:Ϊ 0 ʱд롣
Packet Id:Ϊ 0 ʱд롣
Total Length:д롣
.TE
.PP
ָ IP_HDRINCL IP ͷеĿĵַ 0ô
socket Ŀĵַ·ɸð
ָ MSG_DONTROUTE Ŀĵַ
Ӧָijؽӿڡ·бң·ɻᱻ
ԡδ趨 IP_HDRINCL ͨ setsockopt (2)
raw socket 趨 IP header ѡο ip (7) ˽
Ϣ
Linux 2.2 ¿ IP socket ѡе
IP ͷѡ. ζֻͨµЭ
ûûЭҪ raw socket ( ICMP).
յһʱȱЭκ raw socket
ȻŴЭ(handler)
(磮ںЭģ).
.SH ַʽ
raw socket ʹ ip (7) жı sockaddr_in ַṹ
sin_port ָ IP Эţ Linux 2.2 ´ʱӦ
ԣӦһֱΪ0 (μ BUGS).
ڽյİsin_port ΪðЭš
ο аЧ IP Эļ.
.SH SOCKETѡ
raw socket ѡʹ setsockopt (2) ã
getsockopt (2)жȡͨ SOL_RAW ־.
.TP
.B ICMP_FILTER
IPPROTO_ICMP Эһ raw socket Ĺ
ֵÿ ICMP Ϣһλ룩
ICMP Ϣ˵ȱʡʱDz ICMP Ϣ
⣬֧жݱ socket Ч ip(7) SOL_IP
socket ѡ
.SH ע
raw socket ӿ MTU ʱѰֳƬ( BUGS).
һѺúͿٵѡʹ· MTU ҡ
ip (7) IP_PMTU_DISCOVER һϸ
ʹ bind (2) ɽ raw socket ָıصַ
ûазָ IP Эİ
SO_BINDTODEVICE Խ RAW socket ָ
豸 socket (7).
IPPROTO_RAW ֻܴ͡ȷʵе IP
packet (7) socket ETH_P_IP Э.
ע packet socket raw socket IP Ƭ顣
ҪΪһ datagram socket յ ICMP ô
Ǹ socket ʹ IP_RECVERR ip (7).
raw socket е IP Э, ʹ ICMP
TCP ںЭģҲ⡣ʱͬʱ͵
ģraw socket. һֲijԣ
BSD socket ʵⷽоޣ
Linux Ӳıûİ (ǰ
ᵽ IP_HDRINCL һЩ0ֶ). raw socket
ʵַʽDzͬģ
RAW socket ֲͨ. socket ʱʹ sin_port õ
Э飬 Linux2.2 ²ˣ취ʹ IP_HDRINCL.
.SH
ֻ socket IP_RECVERR ΪЧʱŻ
ûΪԵԭֻ EMSGSIZE EPROTO
socket.
.SH
.TP
.B IP_RECVERR
ʹеĴ洢 error queueУ.
.TP
.B EMSGSIZE
̫Ϊ· MTU IP_PMTU_DISCOVER
ΪЧΪijߴ糬 IPv4 涨İ
ߴ 64KB.
.TP
.B EACCES
ûͼ͵ij㲥ַDzδsocketù㲥
־
.TP
.B EPROTO
ICMP в⡣
.TP
.B EFAULT
Чڴַ
.TP
.B EOPNOTSUPP
socket ı־Ч(磺MSG_OOB ).
.TP
.B EINVAL
Ч.
.TP
.B EPERM
ûȨ raw socket. ֻû id Ϊ 0
CAP_NET_RAW Էɡ
.SH
IP_RECVERR ICMP_FILTER Linux 2.2 ʵ.
ڿֲ
SO_BSDCOMPAT ־
Linux 2.0 к BSD ݵ raw socket
2.2 Ѿˣ
.SH BUGS
ûչ.
IP_HDRINCL ѡdatagramsѰַݰᱻֶ
MTU . Linux 2.2 .
Linux 2.2 sin_port õ IP Эᶪʧʹõǰ
socket Э飬 socket (2)ʼָЭ顣
.SH
Andi Kleen.
.SH
.BR ip (7),
.BR socket (7),
.BR recvmsg (2),
.BR sendmsg (2).
.PP
RFC1191 for path MTU discovery.
.br
RFC791 and the include file for the IP protocol.
.br
.SH İά
RedCandle E-mail:redcandle51@chinaren.com
.SH ݸ
2000/10/15
.br
.B й Linux ̳ man ֲҳƻ : www.cmpp.net/
|
