Differential D25873 Diff 75137 sys/netinet6/udp6_usrreq.c

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sys/netinet6/udp6_usrreq.c

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#include <netinet6/in6_rss.h>		#include <netinet6/in6_rss.h>
#include <netinet6/udp6_var.h>		#include <netinet6/udp6_var.h>
#include <netinet6/scope6_var.h>		#include <netinet6/scope6_var.h>

#include <netipsec/ipsec_support.h>		#include <netipsec/ipsec_support.h>

#include <security/mac/mac_framework.h>		#include <security/mac/mac_framework.h>

		VNET_DEFINE(int, zero_checksum_port) = 0;
		#define V_zero_checksum_port VNET(zero_checksum_port)
		SYSCTL_INT(_net_inet6_udp6, OID_AUTO, rfc6935_port, CTLFLAG_VNET \| CTLFLAG_RW,
		&VNET_NAME(zero_checksum_port), 0,
		"Zero UDP checksum allowed for traffic to/from this port.");
/*		/*
* UDP protocol implementation.		* UDP protocol implementation.
* Per RFC 768, August, 1980.		* Per RFC 768, August, 1980.
*/		*/

extern struct protosw inetsw[];		extern struct protosw inetsw[];
static void udp6_detach(struct socket *so);		static void udp6_detach(struct socket *so);

▲ Show 20 Lines • Show All 128 Lines • ▼ Show 20 Lines	if (nxt == IPPROTO_UDPLITE) {
}		}
} else {		} else {
if ((ulen < sizeof(struct udphdr)) \|\| (plen != ulen)) {		if ((ulen < sizeof(struct udphdr)) \|\| (plen != ulen)) {
UDPSTAT_INC(udps_badlen);		UDPSTAT_INC(udps_badlen);
goto badunlocked;		goto badunlocked;
}		}
if (uh->uh_sum == 0) {		if (uh->uh_sum == 0) {
UDPSTAT_INC(udps_nosum);		UDPSTAT_INC(udps_nosum);
		/*
		* dport 0 was rejected earlier so this is OK even if
		* zero_checksum_port is 0 (which is its default value).
		*/
		if (ntohs(uh->uh_dport) == V_zero_checksum_port)
		goto skip_checksum;
		else
goto badunlocked;		goto badunlocked;
}		}
}		}

if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) &&		if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) &&
!cscov_partial) {		!cscov_partial) {
if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)		if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
uh_sum = m->m_pkthdr.csum_data;		uh_sum = m->m_pkthdr.csum_data;
else		else
uh_sum = in6_cksum_pseudo(ip6, ulen, nxt,		uh_sum = in6_cksum_pseudo(ip6, ulen, nxt,
m->m_pkthdr.csum_data);		m->m_pkthdr.csum_data);
uh_sum ^= 0xffff;		uh_sum ^= 0xffff;
} else		} else
uh_sum = in6_cksum_partial(m, nxt, off, plen, ulen);		uh_sum = in6_cksum_partial(m, nxt, off, plen, ulen);

if (uh_sum != 0) {		if (uh_sum != 0) {
UDPSTAT_INC(udps_badsum);		UDPSTAT_INC(udps_badsum);
goto badunlocked;		goto badunlocked;
}		}

		skip_checksum:
/*		/*
* Construct sockaddr format source address.		* Construct sockaddr format source address.
*/		*/
init_sin6(&fromsa[0], m, 0);		init_sin6(&fromsa[0], m, 0);
fromsa[0].sin6_port = uh->uh_sport;		fromsa[0].sin6_port = uh->uh_sport;
init_sin6(&fromsa[1], m, 1);		init_sin6(&fromsa[1], m, 1);
fromsa[1].sin6_port = uh->uh_dport;		fromsa[1].sin6_port = uh->uh_dport;

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