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Since both netinet/ and netinet6/ call into netipsec/ and netpfil/,

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the protocol specific mbuf flags are shared between them.

- Move all M_FOO definitions into a single place: netinet/in6.h, to
  avoid future  clashes.
- Resolve clash between M_DECRYPTED and M_SKIP_FIREWALL which resulted
  in a failure of operation of IPSEC and packet filters.

Thanks to Nicolas and Georgios for all the hard work on bisecting,
testing and finally finding the root of the problem.

PR:			kern/186755
PR:			kern/185876
In collaboration with:	Georgios Amanakis <gamanakis gmail.com>
In collaboration with:	Nicolas DEFFAYET <nicolas-ml deffayet.com>
Sponsored by:		Nginx, Inc.
This commit is contained in:
Gleb Smirnoff 2014-03-12 14:29:08 +00:00
parent 76a1f42f3f
commit aa69c61235
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=263091
4 changed files with 14 additions and 22 deletions
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3
sys/netinet/ip_input.c
View File

@ -702,6 +702,7 @@ ip_input(struct mbuf *m)
* ip_reass() will return a different mbuf.
*/
if (ip->ip_off & htons(IP_MF | IP_OFFMASK)) {
/* XXXGL: shouldn't we save & set m_flags? */
m = ip_reass(m);
if (m == NULL)
return;
@ -794,6 +795,8 @@ SYSCTL_PROC(_net_inet_ip, OID_AUTO, maxfragpackets, CTLTYPE_INT|CTLFLAG_RW,
NULL, 0, sysctl_maxnipq, "I",
"Maximum number of IPv4 fragment reassembly queue entries");
#define M_IP_FRAG M_PROTO9
/*
* Take incoming datagram fragment and try to reassemble it into
* whole datagram. If the argument is the first fragment or one

9
sys/netinet/ip_var.h
View File

@ -162,15 +162,6 @@ void kmod_ipstat_dec(int statnum);
#define IP_ROUTETOIF SO_DONTROUTE /* 0x10 bypass routing tables */
#define IP_ALLOWBROADCAST SO_BROADCAST /* 0x20 can send broadcast packets */
/*
* IPv4 protocol layer specific mbuf flags.
*/
#define M_FASTFWD_OURS M_PROTO1 /* changed dst to local */
#define M_IP_NEXTHOP M_PROTO2 /* explicit ip nexthop */
#define M_SKIP_FIREWALL M_PROTO3 /* skip firewall processing,
keep in sync with IP6 */
#define M_IP_FRAG M_PROTO4 /* fragment reassembly */
#ifdef __NO_STRICT_ALIGNMENT
#define IP_HDR_ALIGNED_P(ip) 1
#else

17
sys/netinet6/in6.h
View File

@ -622,13 +622,18 @@ struct ip6_mtuinfo {
#endif /* __BSD_VISIBLE */
/*
* Redefinition of mbuf flags
* Since both netinet/ and netinet6/ call into netipsec/ and netpfil/,
* the protocol specific mbuf flags are shared between them.
*/
#define M_AUTHIPHDR M_PROTO2
#define M_DECRYPTED M_PROTO3
#define M_LOOP M_PROTO4
#define M_AUTHIPDGM M_PROTO5
#define M_RTALERT_MLD M_PROTO6
#define M_FASTFWD_OURS M_PROTO1 /* changed dst to local */
#define M_IP6_NEXTHOP M_PROTO2 /* explicit ip nexthop */
#define M_IP_NEXTHOP M_PROTO2 /* explicit ip nexthop */
#define M_SKIP_FIREWALL M_PROTO3 /* skip firewall processing */
#define M_AUTHIPHDR M_PROTO4
#define M_DECRYPTED M_PROTO5
#define M_LOOP M_PROTO6
#define M_AUTHIPDGM M_PROTO7
#define M_RTALERT_MLD M_PROTO8
#ifdef _KERNEL
struct cmsghdr;

7
sys/netinet6/ip6_var.h
View File

@ -293,13 +293,6 @@ struct ip6aux {
#define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */
#define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */
/*
* IPv6 protocol layer specific mbuf flags.
*/
#define M_IP6_NEXTHOP M_PROTO2 /* explicit ip nexthop */
#define M_SKIP_FIREWALL M_PROTO3 /* skip firewall processing,
keep in sync with IPv4 */
#ifdef __NO_STRICT_ALIGNMENT
#define IP6_HDR_ALIGNED_P(ip) 1
#else