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ipsec: isolate knowledge about protocols that are last header

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Retire PR_LASTHDR protosw flag.

Reviewed by:		ae
Differential revision:	https://reviews.freebsd.org/D36155
This commit is contained in:
Gleb Smirnoff 2022-08-17 08:24:11 -07:00
parent 05b9737f10
commit 489482e276
6 changed files with 58 additions and 35 deletions
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4
sys/kern/uipc_debug.c
View File

@ -288,10 +288,6 @@ db_print_prflags(short pr_flags)
db_printf("%sPR_IMPLOPCL", comma ? ", " : "");
comma = 1;
}
if (pr_flags & PR_LASTHDR) {
db_printf("%sPR_LASTHDR", comma ? ", " : "");
comma = 1;
}
}
static void

22
sys/netinet/in_proto.c
View File

@ -145,7 +145,7 @@ struct protosw inetsw[] = {
.pr_type = SOCK_SEQPACKET,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_SCTP,
.pr_flags = PR_WANTRCVD|PR_LASTHDR,
.pr_flags = PR_WANTRCVD,
.pr_input = sctp_input,
.pr_ctlinput = sctp_ctlinput,
.pr_ctloutput = sctp_ctloutput,
@ -156,7 +156,7 @@ struct protosw inetsw[] = {
.pr_type = SOCK_STREAM,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_SCTP,
.pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR,
.pr_flags = PR_CONNREQUIRED|PR_WANTRCVD,
.pr_input = sctp_input,
.pr_ctlinput = sctp_ctlinput,
.pr_ctloutput = sctp_ctloutput,
@ -188,7 +188,7 @@ struct protosw inetsw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_ICMP,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = icmp_input,
.pr_ctloutput = rip_ctloutput,
.pr_usrreqs = &rip_usrreqs
@ -197,7 +197,7 @@ struct protosw inetsw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_IGMP,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = igmp_input,
.pr_ctloutput = rip_ctloutput,
.pr_fasttimo = igmp_fasttimo,
@ -208,7 +208,7 @@ struct protosw inetsw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_RSVP,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = rsvp_input,
.pr_ctloutput = rip_ctloutput,
.pr_usrreqs = &rip_usrreqs
@ -217,7 +217,7 @@ struct protosw inetsw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_IPV4,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = encap4_input,
.pr_ctloutput = rip_ctloutput,
.pr_usrreqs = &rip_usrreqs
@ -226,7 +226,7 @@ struct protosw inetsw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_MOBILE,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = encap4_input,
.pr_ctloutput = rip_ctloutput,
.pr_usrreqs = &rip_usrreqs
@ -235,7 +235,7 @@ struct protosw inetsw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_ETHERIP,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = encap4_input,
.pr_ctloutput = rip_ctloutput,
.pr_usrreqs = &rip_usrreqs
@ -244,7 +244,7 @@ struct protosw inetsw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_GRE,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = encap4_input,
.pr_ctloutput = rip_ctloutput,
.pr_usrreqs = &rip_usrreqs
@ -254,7 +254,7 @@ struct protosw inetsw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_IPV6,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = encap4_input,
.pr_ctloutput = rip_ctloutput,
.pr_usrreqs = &rip_usrreqs
@ -264,7 +264,7 @@ struct protosw inetsw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_PIM,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = encap4_input,
.pr_ctloutput = rip_ctloutput,
.pr_usrreqs = &rip_usrreqs

8
sys/netinet/sctp_module.c
View File

@ -59,7 +59,7 @@ struct protosw sctp_stream_protosw = {
.pr_type = SOCK_STREAM,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_SCTP,
.pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR,
.pr_flags = PR_CONNREQUIRED|PR_WANTRCVD,
.pr_input = sctp_input,
.pr_ctlinput = sctp_ctlinput,
.pr_ctloutput = sctp_ctloutput,
@ -71,7 +71,7 @@ struct protosw sctp_seqpacket_protosw = {
.pr_type = SOCK_SEQPACKET,
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_SCTP,
.pr_flags = PR_WANTRCVD|PR_LASTHDR,
.pr_flags = PR_WANTRCVD,
.pr_input = sctp_input,
.pr_ctlinput = sctp_ctlinput,
.pr_ctloutput = sctp_ctloutput,
@ -87,7 +87,7 @@ struct protosw sctp6_stream_protosw = {
.pr_type = SOCK_STREAM,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_SCTP,
.pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR,
.pr_flags = PR_CONNREQUIRED|PR_WANTRCVD,
.pr_input = sctp6_input,
.pr_ctlinput = sctp6_ctlinput,
.pr_ctloutput = sctp_ctloutput,
@ -99,7 +99,7 @@ struct protosw sctp6_seqpacket_protosw = {
.pr_type = SOCK_SEQPACKET,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_SCTP,
.pr_flags = PR_WANTRCVD|PR_LASTHDR,
.pr_flags = PR_WANTRCVD,
.pr_input = sctp6_input,
.pr_ctlinput = sctp6_ctlinput,
.pr_ctloutput = sctp_ctloutput,

16
sys/netinet6/in6_proto.c
View File

@ -180,7 +180,7 @@ struct protosw inet6sw[] = {
.pr_type = SOCK_SEQPACKET,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_SCTP,
.pr_flags = PR_WANTRCVD|PR_LASTHDR,
.pr_flags = PR_WANTRCVD,
.pr_input = sctp6_input,
.pr_ctlinput = sctp6_ctlinput,
.pr_ctloutput = sctp_ctloutput,
@ -193,7 +193,7 @@ struct protosw inet6sw[] = {
.pr_type = SOCK_STREAM,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_SCTP,
.pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR,
.pr_flags = PR_CONNREQUIRED|PR_WANTRCVD,
.pr_input = sctp6_input,
.pr_ctlinput = sctp6_ctlinput,
.pr_ctloutput = sctp_ctloutput,
@ -225,7 +225,7 @@ struct protosw inet6sw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_ICMPV6,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = icmp6_input,
.pr_ctlinput = rip6_ctlinput,
.pr_ctloutput = rip6_ctloutput,
@ -262,7 +262,7 @@ struct protosw inet6sw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_IPV4,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = encap6_input,
.pr_ctloutput = rip6_ctloutput,
.pr_usrreqs = &rip6_usrreqs
@ -272,7 +272,7 @@ struct protosw inet6sw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_IPV6,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = encap6_input,
.pr_ctloutput = rip6_ctloutput,
.pr_usrreqs = &rip6_usrreqs
@ -281,7 +281,7 @@ struct protosw inet6sw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_ETHERIP,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = encap6_input,
.pr_ctloutput = rip6_ctloutput,
.pr_usrreqs = &rip6_usrreqs
@ -290,7 +290,7 @@ struct protosw inet6sw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_GRE,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = encap6_input,
.pr_ctloutput = rip6_ctloutput,
.pr_usrreqs = &rip6_usrreqs
@ -299,7 +299,7 @@ struct protosw inet6sw[] = {
.pr_type = SOCK_RAW,
.pr_domain = &inet6domain,
.pr_protocol = IPPROTO_PIM,
.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = encap6_input,
.pr_ctloutput = rip6_ctloutput,
.pr_usrreqs = &rip6_usrreqs

41
sys/netipsec/ipsec_input.c
View File

@ -228,8 +228,6 @@ ipsec_common_input(struct mbuf *m, int skip, int protoff, int af, int sproto)
}
#ifdef INET
extern struct protosw inetsw[];
/*
* IPSEC_INPUT() method implementation for IPv4.
* 0 - Permitted by inbound security policy for further processing.
@ -253,9 +251,21 @@ ipsec4_input(struct mbuf *m, int offset, int proto)
* Protocols with further headers get their IPsec treatment
* within the protocol specific processing.
*/
if ((inetsw[ip_protox[proto]].pr_flags & PR_LASTHDR) == 0)
switch (proto) {
case IPPROTO_ICMP:
case IPPROTO_IGMP:
case IPPROTO_IPV4:
case IPPROTO_IPV6:
case IPPROTO_RSVP:
case IPPROTO_GRE:
case IPPROTO_MOBILE:
case IPPROTO_ETHERIP:
case IPPROTO_PIM:
case IPPROTO_SCTP:
break;
default:
return (0);
/* FALLTHROUGH */
}
};
/*
* Enforce IPsec policy checking if we are seeing last header.
@ -501,6 +511,24 @@ bad_noepoch:
#endif /* INET */
#ifdef INET6
static bool
ipsec6_lasthdr(int proto)
{
switch (proto) {
case IPPROTO_IPV4:
case IPPROTO_IPV6:
case IPPROTO_GRE:
case IPPROTO_ICMPV6:
case IPPROTO_ETHERIP:
case IPPROTO_PIM:
case IPPROTO_SCTP:
return (true);
default:
return (false);
};
}
/*
* IPSEC_INPUT() method implementation for IPv6.
* 0 - Permitted by inbound security policy for further processing.
@ -524,7 +552,7 @@ ipsec6_input(struct mbuf *m, int offset, int proto)
* Protocols with further headers get their IPsec treatment
* within the protocol specific processing.
*/
if ((inet6sw[ip6_protox[proto]].pr_flags & PR_LASTHDR) == 0)
if (!ipsec6_lasthdr(proto))
return (0);
/* FALLTHROUGH */
};
@ -728,8 +756,7 @@ ipsec6_common_input_cb(struct mbuf *m, struct secasvar *sav, int skip,
* note that we do not visit this with protocols with pcb layer
* code - like udp/tcp/raw ip.
*/
if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
ipsec6_in_reject(m, NULL)) {
if (ipsec6_lasthdr(nxt) && ipsec6_in_reject(m, NULL)) {
error = EINVAL;
goto bad;
}

2
sys/sys/protosw.h
View File

@ -161,7 +161,7 @@ struct protosw {
#define PR_WANTRCVD 0x08 /* want PRU_RCVD calls */
#define PR_RIGHTS 0x10 /* passes capabilities */
#define PR_IMPLOPCL 0x20 /* implied open/close */
#define PR_LASTHDR 0x40 /* enforce ipsec policy; last header */
/* was PR_LASTHDR 0x40 enforce ipsec policy; last header */
#define PR_CAPATTACH 0x80 /* socket can attach in cap mode */
#define PR_SOCKBUF 0x100 /* private implementation of buffers */