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Add code to make multicast routing be an LKM.

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This commit is contained in:
Garrett Wollman 1994-09-14 21:21:29 +00:00
parent 2471ac957c
commit dea246f55a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=2763
1 changed files with 111 additions and 14 deletions
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125
sys/netinet/ip_mroute.c
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@ -48,15 +48,15 @@
#endif
#endif
struct mrtstat mrtstat;
#ifndef MROUTING
/*
* Dummy routines and globals used when multicast routing is not compiled in.
*/
struct socket *ip_mrouter = NULL;
u_int ip_mrtproto = 0;
struct socket *ip_mrouter = NULL;
struct mrtstat mrtstat;
int
_ip_mrouter_cmd(cmd, so, m)
@ -116,8 +116,15 @@ int (*legal_vif_num)(int) = 0;
* Globals. All but ip_mrouter and ip_mrtproto could be static,
* except for netstat or debugging purposes.
*/
#ifndef MROUTE_LKM
struct socket *ip_mrouter = NULL;
struct mrtstat mrtstat;
int ip_mrtproto = IGMP_DVMRP; /* for netstat only */
#else
extern struct mrtstat mrtstat;
extern int ip_mrtproto;
#endif
#define NO_RTE_FOUND 0x1
#define RTE_FOUND 0x2
@ -309,7 +316,7 @@ mfcfind(origin, mcastgrp)
* Handle DVMRP setsockopt commands to modify the multicast routing tables.
*/
int
_ip_mrouter_cmd(cmd, so, m)
X_ip_mrouter_cmd(cmd, so, m)
int cmd;
struct socket *so;
struct mbuf *m;
@ -327,13 +334,15 @@ _ip_mrouter_cmd(cmd, so, m)
}
}
int (*ip_mrouter_cmd)(int, struct socket *, struct mbuf *) = _ip_mrouter_cmd;
#ifndef MROUTE_LKM
int (*ip_mrouter_cmd)(int, struct socket *, struct mbuf *) = X_ip_mrouter_cmd;
#endif
/*
* Handle ioctl commands to obtain information from the cache
*/
int
_mrt_ioctl(cmd, data)
X_mrt_ioctl(cmd, data)
int cmd;
caddr_t data;
{
@ -356,7 +365,11 @@ _mrt_ioctl(cmd, data)
return error;
}
int (*mrt_ioctl)(int, caddr_t, struct proc *) = _mrt_ioctl;
#ifndef MROUTE_LKM
int (*mrt_ioctl)(int, caddr_t, struct proc *) = X_mrt_ioctl;
#else
extern int (*mrt_ioctl)(int, caddr_t, struct proc *);
#endif
/*
* returns the packet count for the source group provided
@ -456,7 +469,7 @@ ip_mrouter_init(so)
* Disable multicast routing
*/
int
_ip_mrouter_done()
X_ip_mrouter_done()
{
vifi_t vifi;
int i;
@ -536,7 +549,9 @@ _ip_mrouter_done()
return 0;
}
int (*ip_mrouter_done)(void) = _ip_mrouter_done;
#ifndef MROUTE_LKM
int (*ip_mrouter_done)(void) = X_ip_mrouter_done;
#endif
/*
* Add a vif to the vif table
@ -898,7 +913,7 @@ del_mfc(mfccp)
#define TUNNEL_LEN 12 /* # bytes of IP option for tunnel encapsulation */
int
_ip_mforward(ip, ifp, m, imo)
X_ip_mforward(ip, ifp, m, imo)
register struct ip *ip;
struct ifnet *ifp;
struct mbuf *m;
@ -1119,8 +1134,10 @@ _ip_mforward(ip, ifp, m, imo)
}
}
#ifndef MROUTE_LKM
int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
struct ip_moptions *) = _ip_mforward;
struct ip_moptions *) = X_ip_mforward;
#endif
/*
* Clean up the cache entry if upcall is not serviced
@ -1257,7 +1274,7 @@ ip_mdq(m, ifp, tunnel_src, rt, imo)
* numvifs there,
*/
int
_legal_vif_num(vif)
X_legal_vif_num(vif)
int vif;
{ if (vif>=0 && vif<=numvifs)
return(1);
@ -1265,7 +1282,9 @@ _legal_vif_num(vif)
return(0);
}
int (*legal_vif_num)(int) = _legal_vif_num;
#ifndef MROUTE_LKM
int (*legal_vif_num)(int) = X_legal_vif_num;
#endif
static void
phyint_send(ip, vifp, m)
@ -1440,7 +1459,11 @@ encap_send(ip, vifp, m)
* ENCAP_PROTO and a local destination address).
*/
void
#ifdef MROUTE_LKM
X_multiencap_decap(m)
#else
multiencap_decap(m)
#endif
register struct mbuf *m;
{
struct ifnet *ifp = m->m_pkthdr.rcvif;
@ -1811,6 +1834,80 @@ priority(vifp, ip)
/*
* End of token bucket filter modifications
*/
#endif
#ifdef MROUTE_LKM
#include <sys/conf.h>
#include <sys/exec.h>
#include <sys/sysent.h>
#include <sys/lkm.h>
MOD_MISC("ip_mroute_mod")
static int
ip_mroute_mod_handle(struct lkm_table *lkmtp, int cmd)
{
int i;
struct lkm_misc *args = lkmtp->private.lkm_misc;
int err = 0;
switch(cmd) {
static int (*old_ip_mrouter_cmd)();
static int (*old_ip_mrouter_done)();
static int (*old_ip_mforward)();
static int (*old_mrt_ioctl)();
static int (*old_proto4_input)();
static int (*old_legal_vif_num)();
extern u_char ip_protox[];
extern struct protosw inetsw[];
case LKM_E_LOAD:
if(lkmexists(lkmtp) || ip_mrtproto)
return(EEXIST);
old_ip_mrouter_cmd = ip_mrouter_cmd;
ip_mrouter_cmd = X_ip_mrouter_cmd;
old_ip_mrouter_done = ip_mrouter_done;
ip_mrouter_done = X_ip_mrouter_done;
old_ip_mforward = ip_mforward;
ip_mforward = X_ip_mforward;
old_mrt_ioctl = mrt_ioctl;
mrt_ioctl = X_mrt_ioctl;
old_proto4_input = inetsw[ip_protox[IPPROTO_ENCAP]].pr_input;
inetsw[ip_protox[IPPROTO_ENCAP]].pr_input = X_multiencap_decap;
old_legal_vif_num = legal_vif_num;
legal_vif_num = X_legal_vif_num;
ip_mrtproto = IGMP_DVMRP;
printf("\nIP multicast routing loaded\n");
break;
case LKM_E_UNLOAD:
if (ip_mrouter)
return EINVAL;
ip_mrouter_cmd = old_ip_mrouter_cmd;
ip_mrouter_done = old_ip_mrouter_done;
ip_mforward = old_ip_mforward;
mrt_ioctl = old_mrt_ioctl;
inetsw[ip_protox[IPPROTO_ENCAP]].pr_input = old_proto4_input;
legal_vif_num = old_legal_vif_num;
ip_mrtproto = 0;
break;
default:
err = EINVAL;
break;
}
return(err);
}
int
ip_mroute_mod(struct lkm_table *lkmtp, int cmd, int ver) {
DISPATCH(lkmtp, cmd, ver, ip_mroute_mod_handle, ip_mroute_mod_handle,
nosys);
}
#endif /* MROUTE_LKM */
#endif /* MROUTING */