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RFC1122 requires that addresses of the form { 127, <any> } MUST NOT

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appear outside a host.

PR:		30792, 33996
Obtained from:	ip_input.c
MFC after:	1 week
This commit is contained in:
Ruslan Ermilov 2002-01-21 13:59:42 +00:00
parent f460490260
commit 8c3f5566ae
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=89614
1 changed files with 11 additions and 1 deletions
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12
sys/netinet/ip_output.c
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@ -422,9 +422,19 @@ ip_output(m0, opt, ro, flags, imo)
goto bad;
}
/* 127/8 must not appear on wire - RFC1122. */
if ((ntohl(ip->ip_dst.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET ||
(ntohl(ip->ip_src.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET) {
if ((ifp->if_flags & IFF_LOOPBACK) == 0) {
ipstat.ips_badaddr++;
error = EADDRNOTAVAIL;
goto bad;
}
}
/*
* Look for broadcast address and
* and verify user is allowed to send
* verify user is allowed to send
* such a packet.
*/
if (isbroadcast) {