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Add a sysctl MIB, NET_RT_IFMALIST, to retrieve multicast group memberships

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in a protocol-independent way.

Submitted by:	harti
This commit is contained in:
Bruce M Simpson 2003-11-14 18:48:15 +00:00
parent 3ef6155b2e
commit 05b2efe044
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=122685
2 changed files with 68 additions and 1 deletions
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65
sys/net/rtsock.c
View File

@ -85,6 +85,7 @@ static int rt_msg2(int, struct rt_addrinfo *, caddr_t, struct walkarg *);
static int rt_xaddrs(caddr_t, caddr_t, struct rt_addrinfo *);
static int sysctl_dumpentry(struct radix_node *rn, void *vw);
static int sysctl_iflist(int af, struct walkarg *w);
static int sysctl_ifmalist(int af, struct walkarg *w);
static int route_output(struct mbuf *, struct socket *);
static void rt_setmetrics(u_long, struct rt_metrics *, struct rt_metrics *);
static void rt_dispatch(struct mbuf *, struct sockaddr *);
@ -684,6 +685,10 @@ rt_msg2(int type, struct rt_addrinfo *rtinfo, caddr_t cp, struct walkarg *w)
len = sizeof(struct if_msghdr);
break;
case RTM_NEWMADDR:
len = sizeof(struct ifma_msghdr);
break;
default:
len = sizeof(struct rt_msghdr);
}
@ -1014,6 +1019,61 @@ sysctl_iflist(int af, struct walkarg *w)
return (error);
}
int
sysctl_ifmalist(af, w)
int af;
register struct walkarg *w;
{
register struct ifnet *ifp;
struct ifmultiaddr *ifma;
struct rt_addrinfo info;
int len, error = 0;
bzero((caddr_t)&info, sizeof(info));
/* IFNET_RLOCK(); */ /* could sleep XXX */
TAILQ_FOREACH(ifp, &ifnet, if_link) {
if (w->w_arg && w->w_arg != ifp->if_index)
continue;
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
if (af && af != ifma->ifma_addr->sa_family)
continue;
if (jailed(curproc->p_ucred) &&
prison_if(curproc->p_ucred, ifma->ifma_addr))
continue;
info.rti_addrs = RTA_IFA;
info.rti_info[RTAX_IFA] = ifma->ifma_addr;
if (TAILQ_FIRST(&ifp->if_addrhead)) {
info.rti_addrs |= RTA_IFP;
info.rti_info[RTAX_IFP] =
TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
} else
info.rti_info[RTAX_IFP] = NULL;
if (ifma->ifma_addr->sa_family != AF_LINK) {
info.rti_addrs |= RTA_GATEWAY;
info.rti_info[RTAX_GATEWAY] = ifma->ifma_lladdr;
} else
info.rti_info[RTAX_GATEWAY] = NULL;
len = rt_msg2(RTM_NEWMADDR, &info, 0, w);
if (w->w_req && w->w_tmem) {
register struct ifma_msghdr *ifmam;
ifmam = (struct ifma_msghdr *)w->w_tmem;
ifmam->ifmam_index = ifma->ifma_ifp->if_index;
ifmam->ifmam_flags = 0;
ifmam->ifmam_addrs = info.rti_addrs;
error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
if (error)
goto done;
}
}
}
done:
/* IFNET_RUNLOCK(); */ /* XXX */
return (error);
}
static int
sysctl_rtsock(SYSCTL_HANDLER_ARGS)
{
@ -1066,6 +1126,11 @@ sysctl_rtsock(SYSCTL_HANDLER_ARGS)
case NET_RT_IFLIST:
error = sysctl_iflist(af, &w);
break;
case NET_RT_IFMALIST:
error = sysctl_ifmalist(af, &w);
break;
}
splx(s);
if (w.w_tmem)

4
sys/sys/socket.h
View File

@ -351,13 +351,15 @@ struct sockaddr_storage {
#define NET_RT_DUMP 1 /* dump; may limit to a.f. */
#define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
#define NET_RT_IFLIST 3 /* survey interface list */
#define NET_RT_MAXID 4
#define NET_RT_IFMALIST 4 /* return multicast address list */
#define NET_RT_MAXID 5
#define CTL_NET_RT_NAMES { \
{ 0, 0 }, \
{ "dump", CTLTYPE_STRUCT }, \
{ "flags", CTLTYPE_STRUCT }, \
{ "iflist", CTLTYPE_STRUCT }, \
{ "ifmalist", CTLTYPE_STRUCT }, \
}
#endif /* __BSD_VISIBLE */