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Add 802.11-specific events that are dispatched through the routing socket.

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This really doesn't belong here but is preferred (for the moment) over
adding yet another mechanism for sending msgs from the kernel to user apps.

Reviewed by:	imp
This commit is contained in:
Sam Leffler 2004-10-05 19:48:33 +00:00
parent 0cc8f89a4a
commit b83a279f19
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=136155
2 changed files with 68 additions and 13 deletions
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2
sys/net/route.h
View File

@ -219,6 +219,7 @@ struct rt_msghdr {
#define RTM_NEWMADDR 0xf /* mcast group membership being added to if */
#define RTM_DELMADDR 0x10 /* mcast group membership being deleted */
#define RTM_IFANNOUNCE 0x11 /* iface arrival/departure */
#define RTM_IEEE80211 0x12 /* IEEE80211 wireless event */
/*
* Bitmask values for rtm_inits and rmx_locks.
@ -319,6 +320,7 @@ extern struct radix_node_head *rt_tables[AF_MAX+1];
struct ifmultiaddr;
int rt_getifa(struct rt_addrinfo *);
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);

79
sys/net/rtsock.c
View File

@ -675,6 +675,7 @@ rt_msg1(int type, struct rt_addrinfo *rtinfo)
break;
case RTM_IFANNOUNCE:
case RTM_IEEE80211:
len = sizeof(struct if_announcemsghdr);
break;
@ -932,6 +933,67 @@ rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
rt_dispatch(m, ifma->ifma_addr);
}
static struct mbuf *
rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
struct rt_addrinfo *info)
{
struct if_announcemsghdr *ifan;
struct mbuf *m;
if (route_cb.any_count == 0)
return NULL;
bzero((caddr_t)info, sizeof(*info));
m = rt_msg1(type, info);
if (m != NULL) {
ifan = mtod(m, struct if_announcemsghdr *);
ifan->ifan_index = ifp->if_index;
strlcpy(ifan->ifan_name, ifp->if_xname,
sizeof(ifan->ifan_name));
ifan->ifan_what = what;
}
return m;
}
/*
* This is called to generate routing socket messages indicating
* IEEE80211 wireless events.
* XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way.
*/
void
rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len)
{
struct mbuf *m;
struct rt_addrinfo info;
m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info);
if (m != NULL) {
/*
* Append the ieee80211 data. Try to stick it in the
* mbuf containing the ifannounce msg; otherwise allocate
* a new mbuf and append.
*
* NB: we assume m is a single mbuf.
*/
if (data_len > M_TRAILINGSPACE(m)) {
struct mbuf *n = m_get(M_NOWAIT, MT_DATA);
if (n == NULL) {
m_freem(m);
return;
}
bcopy(data, mtod(n, void *), data_len);
n->m_len = data_len;
m->m_next = n;
} else if (data_len > 0) {
bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len);
m->m_len += data_len;
}
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);
}
}
/*
* This is called to generate routing socket messages indicating
* network interface arrival and departure.
@ -939,22 +1001,13 @@ rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
void
rt_ifannouncemsg(struct ifnet *ifp, int what)
{
struct if_announcemsghdr *ifan;
struct mbuf *m;
struct rt_addrinfo info;
if (route_cb.any_count == 0)
return;
bzero((caddr_t)&info, sizeof(info));
m = rt_msg1(RTM_IFANNOUNCE, &info);
if (m == NULL)
return;
ifan = mtod(m, struct if_announcemsghdr *);
ifan->ifan_index = ifp->if_index;
strlcpy(ifan->ifan_name, ifp->if_xname, sizeof(ifan->ifan_name));
ifan->ifan_what = what;
rt_dispatch(m, NULL);
}
m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info);
if (m != NULL)
rt_dispatch(m, NULL);
}
static void
rt_dispatch(struct mbuf *m, const struct sockaddr *sa)