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Introduce support for Mandatory Access Control and extensible

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kernel access control.

When fragmenting an IP datagram, invoke an appropriate MAC entry
point so that MAC labels may be copied (...) to the individual
IP fragment mbufs by MAC policies.

When IP options are inserted into an IP datagram when leaving a
host, preserve the label if we need to reallocate the mbuf for
alignment or size reasons.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, NAI Labs
This commit is contained in:
Robert Watson 2002-07-31 17:21:01 +00:00
parent 36b0360b37
commit 4ed84624a2
1 changed files with 8 additions and 0 deletions
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8
sys/netinet/ip_output.c
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@ -41,12 +41,14 @@
#include "opt_ipdivert.h"
#include "opt_ipfilter.h"
#include "opt_ipsec.h"
#include "opt_mac.h"
#include "opt_pfil_hooks.h"
#include "opt_random_ip_id.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mac.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
@ -1002,6 +1004,9 @@ ip_output(m0, opt, ro, flags, imo)
}
m->m_pkthdr.len = mhlen + len;
m->m_pkthdr.rcvif = (struct ifnet *)0;
#ifdef MAC
mac_create_fragment(m0, m);
#endif
m->m_pkthdr.csum_flags = m0->m_pkthdr.csum_flags;
mhip->ip_off = htons(mhip->ip_off);
mhip->ip_sum = 0;
@ -1138,6 +1143,9 @@ ip_insertoptions(m, opt, phlen)
if (n == 0)
return (m);
n->m_pkthdr.rcvif = (struct ifnet *)0;
#ifdef MAC
mac_create_mbuf_from_mbuf(m, n);
#endif
n->m_pkthdr.len = m->m_pkthdr.len + optlen;
m->m_len -= sizeof(struct ip);
m->m_data += sizeof(struct ip);