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* makes mfc[MFCTBLSIZ] and vif[MAXVIFS] tables accessible via

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sysctl:
  - sysctlbyname("net.inet.ip.mfctable", ...)
  - sysctlbyname("net.inet.ip.viftable", ...)

  This change is needed so netstat can use sysctlbyname() to read
  the data from those tables.
  Otherwise, in some cases "netstat -g" may fail to report the
  multicast forwarding information (e.g., if we run a multicast
  router on PicoBSD).

* Bug fix: when sending IGMPMSG_WRONGVIF upcall to the multicast
  routing daemon, set properly "im->im_vif" to the receiving
  incoming interface of the packet that triggered that upcall
  rather than to the expected incoming interface of that packet.

* Bug fix: add missing increment of counter "mrtstat.mrts_upcalls"

* Few formatting nits (e.g., replace extra spaces with TABs)

Submitted by:	Pavlin Radoslavov <pavlin@icir.org>
This commit is contained in:
Jeffrey Hsu 2003-08-05 17:01:33 +00:00
parent ce03e3a7bd
commit 1b6002ec30
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=118501
1 changed files with 24 additions and 9 deletions
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33
sys/netinet/ip_mroute.c
View File

@ -68,8 +68,16 @@ SYSCTL_STRUCT(_net_inet_ip, OID_AUTO, mrtstat, CTLFLAG_RW,
"Multicast Routing Statistics (struct mrtstat, netinet/ip_mroute.h)");
static struct mfc *mfctable[MFCTBLSIZ];
static u_char nexpire[MFCTBLSIZ];
SYSCTL_OPAQUE(_net_inet_ip, OID_AUTO, mfctable, CTLFLAG_RD,
&mfctable, sizeof(mfctable), "S,*mfc[MFCTBLSIZ]",
"Multicast Forwarding Table (struct *mfc[MFCTBLSIZ], netinet/ip_mroute.h)");
static struct vif viftable[MAXVIFS];
SYSCTL_OPAQUE(_net_inet_ip, OID_AUTO, viftable, CTLFLAG_RD,
&viftable, sizeof(viftable), "S,vif[MAXVIFS]",
"Multicast Virtual Interfaces (struct vif[MAXVIFS], netinet/ip_mroute.h)");
static u_char nexpire[MFCTBLSIZ];
static struct callout_handle expire_upcalls_ch;
@ -1084,9 +1092,9 @@ X_ip_mforward(struct ip *ip, struct ifnet *ifp,
* Locate the vifi for the incoming interface for this packet.
* If none found, drop packet.
*/
for (vifi=0; vifi<numvifs && viftable[vifi].v_ifp != ifp; vifi++)
for (vifi=0; vifi < numvifs && viftable[vifi].v_ifp != ifp; vifi++)
;
if (vifi >= numvifs) /* vif not found, drop packet */
if (vifi >= numvifs) /* vif not found, drop packet */
goto non_fatal;
/* no upcall, so make a new entry */
@ -1241,11 +1249,11 @@ ip_mdq(struct mbuf *m, struct ifnet *ifp, struct mfc *rt, vifi_t xmt_vif)
* input, they shouldn't get counted on output, so statistics keeping is
* separate.
*/
#define MC_SEND(ip,vifp,m) { \
if ((vifp)->v_flags & VIFF_TUNNEL) \
encap_send((ip), (vifp), (m)); \
else \
phyint_send((ip), (vifp), (m)); \
#define MC_SEND(ip,vifp,m) { \
if ((vifp)->v_flags & VIFF_TUNNEL) \
encap_send((ip), (vifp), (m)); \
else \
phyint_send((ip), (vifp), (m)); \
}
/*
@ -1280,6 +1288,12 @@ ip_mdq(struct mbuf *m, struct ifnet *ifp, struct mfc *rt, vifi_t xmt_vif)
struct timeval now;
u_long delta;
/* Get vifi for the incoming packet */
for (vifi=0; vifi < numvifs && viftable[vifi].v_ifp != ifp; vifi++)
;
if (vifi >= numvifs)
return 0; /* if not found: ignore the packet */
GET_TIME(now);
TV_DELTA(rt->mfc_last_assert, now, delta);
@ -1302,8 +1316,9 @@ ip_mdq(struct mbuf *m, struct ifnet *ifp, struct mfc *rt, vifi_t xmt_vif)
im->im_mbz = 0;
im->im_vif = vifi;
k_igmpsrc.sin_addr = im->im_src;
mrtstat.mrts_upcalls++;
k_igmpsrc.sin_addr = im->im_src;
if (socket_send(ip_mrouter, mm, &k_igmpsrc) < 0) {
log(LOG_WARNING,
"ip_mforward: ip_mrouter socket queue full\n");