kern/134931: [route] Route messages sent to all socket listeners
regardless of setfib(1)
Alexander V. Chernikov
melifaro at ipfw.ru
Sun Oct 31 07:40:13 UTC 2010
The following reply was made to PR kern/134931; it has been noted by GNATS.
From: "Alexander V. Chernikov" <melifaro at ipfw.ru>
To: bug-followup at FreeBSD.org, count at 211.ru
Cc:
Subject: Re: kern/134931: [route] Route messages sent to all socket listeners
regardless of setfib(1)
Date: Sun, 31 Oct 2010 10:27:29 +0300
This is a multi-part message in MIME format.
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This modified patch works well for me on FreeBSD 7.2-RELEASE-p5 amd64
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name="rtsock.diff"
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filename="rtsock.diff"
--- sys/net/rtsock.c.orig 2009-04-15 07:14:26.000000000 +0400
+++ sys/net/rtsock.c 2010-10-15 16:52:57.000000000 +0400
@@ -88,6 +88,11 @@
SYSCTL_INT(_net_route, OID_AUTO, netisr_maxqlen, CTLFLAG_RW,
&rtsintrq.ifq_maxlen, 0, "maximum routing socket dispatch queue length");
+struct rt_dispatch_ctx {
+ unsigned short family; /* Socket family */
+ int fibnum; /* FIB for message or -1 for all */
+};
+
struct walkarg {
int w_tmemsize;
int w_op, w_arg;
@@ -109,7 +114,7 @@
struct rt_metrics_lite *out);
static void rt_getmetrics(const struct rt_metrics_lite *in,
struct rt_metrics *out);
-static void rt_dispatch(struct mbuf *, const struct sockaddr *);
+static void rt_dispatch(struct mbuf *, const struct sockaddr *, int);
static void
rts_init(void)
@@ -128,19 +133,21 @@
rts_input(struct mbuf *m)
{
struct sockproto route_proto;
- unsigned short *family;
+ struct rt_dispatch_ctx *ctx;
struct m_tag *tag;
+ int fibnum = -1;
route_proto.sp_family = PF_ROUTE;
- tag = m_tag_find(m, PACKET_TAG_RTSOCKFAM, NULL);
+ tag = m_tag_find(m, PACKET_TAG_RTSOCK, NULL);
if (tag != NULL) {
- family = (unsigned short *)(tag + 1);
- route_proto.sp_protocol = *family;
+ ctx = (struct rt_dispatch_ctx*)(tag + 1);
+ route_proto.sp_protocol = ctx->family;
+ fibnum = ctx->fibnum;
m_tag_delete(m, tag);
} else
route_proto.sp_protocol = 0;
- raw_input(m, &route_proto, &route_src);
+ raw_input(m, &route_proto, &route_src, fibnum);
}
/*
@@ -729,10 +736,10 @@
*/
unsigned short family = rp->rcb_proto.sp_family;
rp->rcb_proto.sp_family = 0;
- rt_dispatch(m, info.rti_info[RTAX_DST]);
+ rt_dispatch(m, info.rti_info[RTAX_DST], so->so_fibnum);
rp->rcb_proto.sp_family = family;
} else
- rt_dispatch(m, info.rti_info[RTAX_DST]);
+ rt_dispatch(m, info.rti_info[RTAX_DST], so->so_fibnum);
}
}
return (error);
@@ -953,7 +960,7 @@
* destination.
*/
void
-rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
+rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error, int fibnum)
{
struct rt_msghdr *rtm;
struct mbuf *m;
@@ -968,7 +975,7 @@
rtm->rtm_flags = RTF_DONE | flags;
rtm->rtm_errno = error;
rtm->rtm_addrs = rtinfo->rti_addrs;
- rt_dispatch(m, sa);
+ rt_dispatch(m, sa, fibnum);
}
/*
@@ -993,7 +1000,7 @@
ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
ifm->ifm_data = ifp->if_data;
ifm->ifm_addrs = 0;
- rt_dispatch(m, NULL);
+ rt_dispatch(m, NULL, -1);
}
/*
@@ -1005,7 +1012,7 @@
* copies of it.
*/
void
-rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt)
+rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt, int fibnum)
{
struct rt_addrinfo info;
struct sockaddr *sa = NULL;
@@ -1061,7 +1068,7 @@
rtm->rtm_errno = error;
rtm->rtm_addrs = info.rti_addrs;
}
- rt_dispatch(m, sa);
+ rt_dispatch(m, sa, fibnum);
}
}
@@ -1097,7 +1104,7 @@
__func__));
ifmam->ifmam_index = ifp->if_index;
ifmam->ifmam_addrs = info.rti_addrs;
- rt_dispatch(m, ifma->ifma_addr);
+ rt_dispatch(m, ifma->ifma_addr, -1);
}
static struct mbuf *
@@ -1157,7 +1164,7 @@
if (m->m_flags & M_PKTHDR)
m->m_pkthdr.len += data_len;
mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len;
- rt_dispatch(m, NULL);
+ rt_dispatch(m, NULL, -1);
}
}
@@ -1173,27 +1180,30 @@
m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info);
if (m != NULL)
- rt_dispatch(m, NULL);
+ rt_dispatch(m, NULL, -1);
}
static void
-rt_dispatch(struct mbuf *m, const struct sockaddr *sa)
+rt_dispatch(struct mbuf *m, const struct sockaddr *sa, int fibnum)
{
+ struct rt_dispatch_ctx *ctx;
struct m_tag *tag;
/*
* Preserve the family from the sockaddr, if any, in an m_tag for
* use when injecting the mbuf into the routing socket buffer from
- * the netisr.
+ * the netisr. Additionally save the fibnum if needed.
*/
- if (sa != NULL) {
- tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short),
- M_NOWAIT);
+ if (sa != NULL || fibnum >= 0) {
+ tag = m_tag_get(PACKET_TAG_RTSOCK,
+ sizeof(struct rt_dispatch_ctx*), M_NOWAIT);
if (tag == NULL) {
m_freem(m);
return;
}
- *(unsigned short *)(tag + 1) = sa->sa_family;
+ ctx = (struct rt_dispatch_ctx*)(tag + 1);
+ ctx->family = sa->sa_family;
+ ctx->fibnum = fibnum;
m_tag_prepend(m, tag);
}
netisr_queue(NETISR_ROUTE, m); /* mbuf is free'd on failure. */
--- sys/net/raw_usrreq.c.orig 2009-04-15 07:14:26.000000000 +0400
+++ sys/net/raw_usrreq.c 2010-10-15 16:52:57.000000000 +0400
@@ -67,7 +67,7 @@
* Raw protocol interface.
*/
void
-raw_input(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src)
+raw_input(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src, int fibnum)
{
struct rawcb *rp;
struct mbuf *m = m0;
@@ -81,6 +81,9 @@
if (rp->rcb_proto.sp_protocol &&
rp->rcb_proto.sp_protocol != proto->sp_protocol)
continue;
+ if (fibnum >= 0 && rp->rcb_socket &&
+ fibnum != rp->rcb_socket->so_fibnum)
+ continue;
if (last) {
struct mbuf *n;
n = m_copy(m, 0, (int)M_COPYALL);
--- sys/net/raw_cb.h.orig 2009-04-15 07:14:26.000000000 +0400
+++ sys/net/raw_cb.h 2010-10-15 16:52:57.000000000 +0400
@@ -70,7 +70,7 @@
*/
int raw_attach(struct socket *, int);
void raw_detach(struct rawcb *);
-void raw_input(struct mbuf *, struct sockproto *, struct sockaddr *);
+void raw_input(struct mbuf *, struct sockproto *, struct sockaddr *, int);
/*
* Generic pr_usrreqs entries for raw socket protocols, usually wrapped so
--- sys/net/route.c.orig 2009-04-15 07:14:26.000000000 +0400
+++ sys/net/route.c 2010-10-15 17:02:25.000000000 +0400
@@ -344,7 +344,7 @@
newrt->rt_ifp->if_addr->ifa_addr;
info.rti_info[RTAX_IFA] = newrt->rt_ifa->ifa_addr;
}
- rt_missmsg(RTM_ADD, &info, newrt->rt_flags, 0);
+ rt_missmsg(RTM_ADD, &info, newrt->rt_flags, 0, fibnum);
} else {
KASSERT(rt == newrt, ("locking wrong route"));
RT_LOCK(newrt);
@@ -370,7 +370,7 @@
*/
bzero(&info, sizeof(info));
info.rti_info[RTAX_DST] = dst;
- rt_missmsg(msgtype, &info, 0, err);
+ rt_missmsg(msgtype, &info, 0, err, fibnum);
}
}
if (newrt)
@@ -591,7 +591,7 @@
info.rti_info[RTAX_GATEWAY] = gateway;
info.rti_info[RTAX_NETMASK] = netmask;
info.rti_info[RTAX_AUTHOR] = src;
- rt_missmsg(RTM_REDIRECT, &info, flags, error);
+ rt_missmsg(RTM_REDIRECT, &info, flags, error, fibnum);
}
int
@@ -1482,7 +1482,7 @@
* notify any listening routing agents of the change
*/
RT_LOCK(rt);
- rt_newaddrmsg(cmd, ifa, error, rt);
+ rt_newaddrmsg(cmd, ifa, error, rt, fibnum);
if (cmd == RTM_DELETE) {
/*
* If we are deleting, and we found an entry, then
--- sys/net/route.h.orig 2009-04-15 07:14:26.000000000 +0400
+++ sys/net/route.h 2010-10-15 16:52:57.000000000 +0400
@@ -350,8 +350,8 @@
void rt_ieee80211msg(struct ifnet *, int, void *, size_t);
void rt_ifannouncemsg(struct ifnet *, int);
void rt_ifmsg(struct ifnet *);
-void rt_missmsg(int, struct rt_addrinfo *, int, int);
-void rt_newaddrmsg(int, struct ifaddr *, int, struct rtentry *);
+void rt_missmsg(int, struct rt_addrinfo *, int, int, int);
+void rt_newaddrmsg(int, struct ifaddr *, int, struct rtentry *, int);
void rt_newmaddrmsg(int, struct ifmultiaddr *);
int rt_setgate(struct rtentry *, struct sockaddr *, struct sockaddr *);
--- sys/netinet6/in6.c.orig 2009-06-10 14:31:11.000000000 +0400
+++ sys/netinet6/in6.c 2010-10-15 17:03:36.000000000 +0400
@@ -190,7 +190,7 @@
nrt->rt_ifa = ifa;
}
- rt_newaddrmsg(cmd, ifa, e, nrt);
+ rt_newaddrmsg(cmd, ifa, e, nrt, -1);
if (cmd == RTM_DELETE)
RTFREE_LOCKED(nrt);
else {
--- sys/sys/mbuf.h.orig 2009-04-15 07:14:26.000000000 +0400
+++ sys/sys/mbuf.h 2010-10-15 16:54:59.000000000 +0400
@@ -851,7 +851,7 @@
#define PACKET_TAG_IPFORWARD 18 /* ipforward info */
#define PACKET_TAG_MACLABEL (19 | MTAG_PERSISTENT) /* MAC label */
#define PACKET_TAG_PF 21 /* PF + ALTQ information */
-#define PACKET_TAG_RTSOCKFAM 25 /* rtsock sa family */
+#define PACKET_TAG_RTSOCK 25 /* rtsock extra info */
#define PACKET_TAG_IPOPTIONS 27 /* Saved IP options */
#define PACKET_TAG_CARP 28 /* CARP info */
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