#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/socketvar.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/kern_event.h>
#include <sys/syslog.h>
#include <sys/mcache.h>
#include <kern/zalloc.h>
#include <pexpert/pexpert.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/route.h>
#include <net/kpi_protocol.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_pcb.h>
#include <netinet/igmp_var.h>
#include <net/dlil.h>
#include <netinet/ip_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <sys/file.h>
#if PF
#include <net/pfvar.h>
#endif
static int in_mask2len(struct in_addr *);
static void in_len2mask(struct in_addr *, int);
static int in_lifaddr_ioctl(struct socket *, u_long, struct if_laddrreq *,
struct ifnet *, struct proc *);
static int in_setrouter(struct ifnet *, int);
static void in_socktrim(struct sockaddr_in *);
static int in_ifinit(struct ifnet *,
struct in_ifaddr *, struct sockaddr_in *, int);
#define IA_HASH_INIT(ia) { \
(ia)->ia_hash.tqe_next = (void *)(uintptr_t)-1; \
(ia)->ia_hash.tqe_prev = (void *)(uintptr_t)-1; \
}
#define IA_IS_HASHED(ia) \
(!((ia)->ia_hash.tqe_next == (void *)(uintptr_t)-1 || \
(ia)->ia_hash.tqe_prev == (void *)(uintptr_t)-1))
static void in_iahash_remove(struct in_ifaddr *);
static void in_iahash_insert(struct in_ifaddr *);
static void in_iahash_insert_ptp(struct in_ifaddr *);
static struct in_ifaddr *in_ifaddr_alloc(int);
static void in_ifaddr_attached(struct ifaddr *);
static void in_ifaddr_detached(struct ifaddr *);
static void in_ifaddr_free(struct ifaddr *);
static void in_ifaddr_trace(struct ifaddr *, int);
static int subnetsarelocal = 0;
SYSCTL_INT(_net_inet_ip, OID_AUTO, subnets_are_local, CTLFLAG_RW | CTLFLAG_LOCKED,
&subnetsarelocal, 0, "");
__private_extern__ u_int32_t ipv4_ll_arp_aware = 0;
#define INIFA_TRACE_HIST_SIZE 32
__private_extern__ unsigned int inifa_trace_hist_size = INIFA_TRACE_HIST_SIZE;
struct in_ifaddr_dbg {
struct in_ifaddr inifa;
struct in_ifaddr inifa_old;
u_int16_t inifa_refhold_cnt;
u_int16_t inifa_refrele_cnt;
ctrace_t inifa_alloc;
ctrace_t inifa_free;
ctrace_t inifa_refhold[INIFA_TRACE_HIST_SIZE];
ctrace_t inifa_refrele[INIFA_TRACE_HIST_SIZE];
TAILQ_ENTRY(in_ifaddr_dbg) inifa_trash_link;
};
static TAILQ_HEAD(, in_ifaddr_dbg) inifa_trash_head;
static decl_lck_mtx_data(, inifa_trash_lock);
#if DEBUG
static unsigned int inifa_debug = 1;
#else
static unsigned int inifa_debug;
#endif
static unsigned int inifa_size;
static struct zone *inifa_zone;
#define INIFA_ZONE_MAX 64
#define INIFA_ZONE_NAME "in_ifaddr"
int
inaddr_local(struct in_addr in)
{
struct rtentry *rt;
struct sockaddr_in sin;
int local = 0;
if (ntohl(in.s_addr) == INADDR_LOOPBACK || IN_LINKLOCAL(ntohl(in.s_addr))) {
local = 1;
} else if (ntohl(in.s_addr) >= INADDR_UNSPEC_GROUP &&
ntohl(in.s_addr) <= INADDR_MAX_LOCAL_GROUP) {
local = 1;
} else {
sin.sin_family = AF_INET;
sin.sin_len = sizeof (sin);
sin.sin_addr = in;
rt = rtalloc1((struct sockaddr *)&sin, 0, 0);
if (rt != NULL) {
RT_LOCK_SPIN(rt);
if (rt->rt_gateway->sa_family == AF_LINK ||
(rt->rt_ifp->if_flags & IFF_LOOPBACK))
local = 1;
RT_UNLOCK(rt);
rtfree(rt);
} else {
local = in_localaddr(in);
}
}
return (local);
}
int
in_localaddr(struct in_addr in)
{
u_int32_t i = ntohl(in.s_addr);
struct in_ifaddr *ia;
if (subnetsarelocal) {
lck_rw_lock_shared(in_ifaddr_rwlock);
for (ia = in_ifaddrhead.tqh_first; ia;
ia = ia->ia_link.tqe_next) {
IFA_LOCK(&ia->ia_ifa);
if ((i & ia->ia_netmask) == ia->ia_net) {
IFA_UNLOCK(&ia->ia_ifa);
lck_rw_done(in_ifaddr_rwlock);
return (1);
}
IFA_UNLOCK(&ia->ia_ifa);
}
lck_rw_done(in_ifaddr_rwlock);
} else {
lck_rw_lock_shared(in_ifaddr_rwlock);
for (ia = in_ifaddrhead.tqh_first; ia;
ia = ia->ia_link.tqe_next) {
IFA_LOCK(&ia->ia_ifa);
if ((i & ia->ia_subnetmask) == ia->ia_subnet) {
IFA_UNLOCK(&ia->ia_ifa);
lck_rw_done(in_ifaddr_rwlock);
return (1);
}
IFA_UNLOCK(&ia->ia_ifa);
}
lck_rw_done(in_ifaddr_rwlock);
}
return (0);
}
int
in_canforward(struct in_addr in)
{
u_int32_t i = ntohl(in.s_addr);
u_int32_t net;
if (IN_EXPERIMENTAL(i) || IN_MULTICAST(i))
return (0);
if (IN_CLASSA(i)) {
net = i & IN_CLASSA_NET;
if (net == 0 || net == (IN_LOOPBACKNET << IN_CLASSA_NSHIFT))
return (0);
}
return (1);
}
static void
in_socktrim(struct sockaddr_in *ap)
{
char *cplim = (char *) &ap->sin_addr;
char *cp = (char *) (&ap->sin_addr + 1);
ap->sin_len = 0;
while (--cp >= cplim)
if (*cp) {
(ap)->sin_len = cp - (char *) (ap) + 1;
break;
}
}
static int
in_mask2len(struct in_addr *mask)
{
size_t x, y;
u_char *p;
p = (u_char *)mask;
for (x = 0; x < sizeof(*mask); x++) {
if (p[x] != 0xff)
break;
}
y = 0;
if (x < sizeof(*mask)) {
for (y = 0; y < 8; y++) {
if ((p[x] & (0x80 >> y)) == 0)
break;
}
}
return x * 8 + y;
}
static void
in_len2mask(struct in_addr *mask, int len)
{
int i;
u_char *p;
p = (u_char *)mask;
bzero(mask, sizeof(*mask));
for (i = 0; i < len / 8; i++)
p[i] = 0xff;
if (len % 8)
p[i] = (0xff00 >> (len % 8)) & 0xff;
}
static int in_interfaces;
static int
in_domifattach(struct ifnet *ifp)
{
int error;
if ((error = proto_plumb(PF_INET, ifp)) && error != EEXIST)
log(LOG_ERR, "%s: proto_plumb returned %d if=%s%d\n",
__func__, error, ifp->if_name, ifp->if_unit);
return (error);
}
int
in_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp,
struct proc *p)
{
struct in_ifaddr *ia = NULL;
struct ifaddr *ifa;
struct sockaddr_in oldaddr;
int error = 0;
int hostIsNew, maskIsNew;
struct kev_msg ev_msg;
struct kev_in_data in_event_data;
bzero(&in_event_data, sizeof (struct kev_in_data));
bzero(&ev_msg, sizeof (struct kev_msg));
switch (cmd) {
case SIOCALIFADDR:
case SIOCDLIFADDR:
if ((error = proc_suser(p)) != 0)
return (error);
case SIOCGLIFADDR: {
struct if_laddrreq iflr;
if (ifp == NULL)
return (EINVAL);
bcopy(data, &iflr, sizeof (iflr));
error = in_lifaddr_ioctl(so, cmd, &iflr, ifp, p);
bcopy(&iflr, data, sizeof (iflr));
return (error);
}
}
if (ifp != NULL) {
struct in_ifaddr *iap;
struct sockaddr_in sin;
bcopy(&((struct ifreq *)(void *)data)->ifr_addr,
&sin, sizeof (sin));
lck_rw_lock_shared(in_ifaddr_rwlock);
for (iap = in_ifaddrhead.tqh_first; iap != NULL;
iap = iap->ia_link.tqe_next) {
if (iap->ia_ifp != ifp)
continue;
IFA_LOCK(&iap->ia_ifa);
if (sin.sin_addr.s_addr ==
iap->ia_addr.sin_addr.s_addr) {
ia = iap;
IFA_UNLOCK(&iap->ia_ifa);
break;
} else if (ia == NULL) {
ia = iap;
if (sin.sin_family != AF_INET) {
IFA_UNLOCK(&iap->ia_ifa);
break;
}
}
IFA_UNLOCK(&iap->ia_ifa);
}
if (ia != NULL)
IFA_ADDREF(&ia->ia_ifa);
lck_rw_done(in_ifaddr_rwlock);
}
switch (cmd) {
case SIOCAUTOADDR:
case SIOCARPIPLL:
case SIOCSETROUTERMODE:
if ((error = proc_suser(p)) != 0) {
goto done;
}
if (ifp == NULL) {
error = EADDRNOTAVAIL;
goto done;
}
break;
case SIOCAIFADDR:
case SIOCDIFADDR: {
struct sockaddr_in addr, dstaddr;
if (ifp == NULL) {
error = EADDRNOTAVAIL;
goto done;
}
if (cmd == SIOCAIFADDR) {
bcopy(&((struct in_aliasreq *)(void *)data)->
ifra_addr, &addr, sizeof (addr));
bcopy(&((struct in_aliasreq *)(void *)data)->
ifra_dstaddr, &dstaddr, sizeof (dstaddr));
} else {
VERIFY(cmd == SIOCDIFADDR);
bcopy(&((struct ifreq *)(void *)data)->ifr_addr,
&addr, sizeof (addr));
bzero(&dstaddr, sizeof (dstaddr));
}
if (addr.sin_family == AF_INET) {
struct in_ifaddr *oia;
lck_rw_lock_shared(in_ifaddr_rwlock);
for (oia = ia; ia; ia = ia->ia_link.tqe_next) {
IFA_LOCK(&ia->ia_ifa);
if (ia->ia_ifp == ifp &&
ia->ia_addr.sin_addr.s_addr ==
addr.sin_addr.s_addr) {
IFA_ADDREF_LOCKED(&ia->ia_ifa);
IFA_UNLOCK(&ia->ia_ifa);
break;
}
IFA_UNLOCK(&ia->ia_ifa);
}
lck_rw_done(in_ifaddr_rwlock);
if (oia != NULL)
IFA_REMREF(&oia->ia_ifa);
if ((ifp->if_flags & IFF_POINTOPOINT) &&
(cmd == SIOCAIFADDR) &&
(dstaddr.sin_addr.s_addr == INADDR_ANY)) {
error = EDESTADDRREQ;
goto done;
}
} else if (cmd == SIOCAIFADDR) {
error = EINVAL;
goto done;
}
if (cmd == SIOCDIFADDR && ia == NULL) {
error = EADDRNOTAVAIL;
goto done;
}
}
case SIOCSIFADDR:
case SIOCSIFNETMASK:
case SIOCSIFDSTADDR: {
struct sockaddr_in addr;
if (cmd == SIOCAIFADDR) {
bcopy(&((struct in_aliasreq *)(void *)data)->
ifra_addr, &addr, sizeof (addr));
} else {
VERIFY(cmd == SIOCDIFADDR || cmd == SIOCSIFADDR ||
cmd == SIOCSIFNETMASK || cmd == SIOCSIFDSTADDR);
bcopy(&((struct ifreq *)(void *)data)->ifr_addr,
&addr, sizeof (addr));
}
if (so != NULL && (so->so_state & SS_PRIV) == 0) {
error = EPERM;
goto done;
}
if (so == NULL && p != kernproc) {
error = EPERM;
goto done;
}
if (ifp == NULL) {
error = EADDRNOTAVAIL;
goto done;
}
if (addr.sin_family != AF_INET && cmd == SIOCSIFADDR) {
error = EINVAL;
goto done;
}
if (ia == NULL) {
ia = in_ifaddr_alloc(M_WAITOK);
if (ia == NULL) {
error = ENOBUFS;
goto done;
}
ifnet_lock_exclusive(ifp);
ifa = &ia->ia_ifa;
IFA_LOCK(ifa);
IFA_ADDREF_LOCKED(ifa);
IA_HASH_INIT(ia);
ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr;
ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr;
ifa->ifa_netmask = (struct sockaddr *)&ia->ia_sockmask;
ia->ia_sockmask.sin_len = 8;
if (ifp->if_flags & IFF_BROADCAST) {
ia->ia_broadaddr.sin_len = sizeof (ia->ia_addr);
ia->ia_broadaddr.sin_family = AF_INET;
}
ia->ia_ifp = ifp;
if (!(ifp->if_flags & IFF_LOOPBACK))
in_interfaces++;
if_attach_ifa(ifp, ifa);
if (cmd == SIOCAIFADDR || cmd == SIOCSIFADDR)
ifa->ifa_debug |= IFD_NOTREADY;
IFA_UNLOCK(ifa);
ifnet_lock_done(ifp);
lck_rw_lock_exclusive(in_ifaddr_rwlock);
IFA_ADDREF(ifa);
TAILQ_INSERT_TAIL(&in_ifaddrhead, ia, ia_link);
lck_rw_done(in_ifaddr_rwlock);
(void) in_domifattach(ifp);
error = 0;
}
break;
}
case SIOCPROTOATTACH:
case SIOCPROTODETACH:
if ((error = proc_suser(p)) != 0) {
goto done;
}
if (ifp == NULL) {
error = EADDRNOTAVAIL;
goto done;
}
break;
case SIOCSIFBRDADDR:
if ((so->so_state & SS_PRIV) == 0) {
error = EPERM;
goto done;
}
case SIOCGIFADDR:
case SIOCGIFNETMASK:
case SIOCGIFDSTADDR:
case SIOCGIFBRDADDR:
if (ia == NULL) {
error = EADDRNOTAVAIL;
goto done;
}
break;
}
switch (cmd) {
case SIOCAUTOADDR: {
int intval;
VERIFY(ifp != NULL);
bcopy(&((struct ifreq *)(void *)data)->ifr_intval,
&intval, sizeof (intval));
ifnet_lock_exclusive(ifp);
if (intval) {
if (ifp->if_eflags & IFEF_IPV4_ROUTER) {
intval = 0;
error = EBUSY;
} else {
ifp->if_eflags |= IFEF_AUTOCONFIGURING;
}
}
if (!intval)
ifp->if_eflags &= ~IFEF_AUTOCONFIGURING;
ifnet_lock_done(ifp);
break;
}
case SIOCARPIPLL: {
int intval;
VERIFY(ifp != NULL);
bcopy(&((struct ifreq *)(void *)data)->ifr_intval,
&intval, sizeof (intval));
ipv4_ll_arp_aware = 1;
ifnet_lock_exclusive(ifp);
if (intval) {
if (ifp->if_eflags & IFEF_IPV4_ROUTER) {
intval = 0;
error = EBUSY;
} else {
ifp->if_eflags |= IFEF_ARPLL;
}
}
if (!intval)
ifp->if_eflags &= ~IFEF_ARPLL;
ifnet_lock_done(ifp);
break;
}
case SIOCGIFADDR:
VERIFY(ia != NULL);
IFA_LOCK(&ia->ia_ifa);
bcopy(&ia->ia_addr, &((struct ifreq *)(void *)data)->ifr_addr,
sizeof (struct sockaddr_in));
IFA_UNLOCK(&ia->ia_ifa);
break;
case SIOCGIFBRDADDR:
VERIFY(ia != NULL);
if ((ifp->if_flags & IFF_BROADCAST) == 0) {
error = EINVAL;
break;
}
IFA_LOCK(&ia->ia_ifa);
bcopy(&ia->ia_broadaddr,
&((struct ifreq *)(void *)data)->ifr_broadaddr,
sizeof (struct sockaddr_in));
IFA_UNLOCK(&ia->ia_ifa);
break;
case SIOCGIFDSTADDR:
VERIFY(ia != NULL);
if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
error = EINVAL;
break;
}
IFA_LOCK(&ia->ia_ifa);
bcopy(&ia->ia_dstaddr,
&((struct ifreq *)(void *)data)->ifr_dstaddr,
sizeof (struct sockaddr_in));
IFA_UNLOCK(&ia->ia_ifa);
break;
case SIOCGIFNETMASK:
VERIFY(ia != NULL);
IFA_LOCK(&ia->ia_ifa);
bcopy(&ia->ia_sockmask,
&((struct ifreq *)(void *)data)->ifr_addr,
sizeof (struct sockaddr_in));
IFA_UNLOCK(&ia->ia_ifa);
break;
case SIOCSIFDSTADDR:
VERIFY(ifp != NULL && ia != NULL);
if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
error = EINVAL;
break;
}
IFA_LOCK(&ia->ia_ifa);
oldaddr = ia->ia_dstaddr;
bcopy(&((struct ifreq *)(void *)data)->ifr_dstaddr,
&ia->ia_dstaddr, sizeof (struct sockaddr_in));
if (ia->ia_dstaddr.sin_family == AF_INET)
ia->ia_dstaddr.sin_len = sizeof (struct sockaddr_in);
IFA_UNLOCK(&ia->ia_ifa);
error = ifnet_ioctl(ifp, PF_INET, SIOCSIFDSTADDR, ia);
IFA_LOCK(&ia->ia_ifa);
if (error == EOPNOTSUPP) {
error = 0;
}
if (error) {
ia->ia_dstaddr = oldaddr;
IFA_UNLOCK(&ia->ia_ifa);
break;
}
IFA_LOCK_ASSERT_HELD(&ia->ia_ifa);
ev_msg.vendor_code = KEV_VENDOR_APPLE;
ev_msg.kev_class = KEV_NETWORK_CLASS;
ev_msg.kev_subclass = KEV_INET_SUBCLASS;
ev_msg.event_code = KEV_INET_SIFDSTADDR;
if (ia->ia_ifa.ifa_dstaddr) {
in_event_data.ia_dstaddr = ((struct sockaddr_in *)
(void *)ia->ia_ifa.ifa_dstaddr)->sin_addr;
} else {
in_event_data.ia_dstaddr.s_addr = INADDR_ANY;
}
in_event_data.ia_addr = ia->ia_addr.sin_addr;
in_event_data.ia_net = ia->ia_net;
in_event_data.ia_netmask = ia->ia_netmask;
in_event_data.ia_subnet = ia->ia_subnet;
in_event_data.ia_subnetmask = ia->ia_subnetmask;
in_event_data.ia_netbroadcast = ia->ia_netbroadcast;
IFA_UNLOCK(&ia->ia_ifa);
(void) strncpy(&in_event_data.link_data.if_name[0],
ifp->if_name, IFNAMSIZ);
in_event_data.link_data.if_family = ifp->if_family;
in_event_data.link_data.if_unit = (u_int32_t) ifp->if_unit;
ev_msg.dv[0].data_ptr = &in_event_data;
ev_msg.dv[0].data_length = sizeof (struct kev_in_data);
ev_msg.dv[1].data_length = 0;
kev_post_msg(&ev_msg);
lck_mtx_lock(rnh_lock);
IFA_LOCK(&ia->ia_ifa);
if (ia->ia_flags & IFA_ROUTE) {
ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&oldaddr;
IFA_UNLOCK(&ia->ia_ifa);
rtinit_locked(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
IFA_LOCK(&ia->ia_ifa);
ia->ia_ifa.ifa_dstaddr =
(struct sockaddr *)&ia->ia_dstaddr;
IFA_UNLOCK(&ia->ia_ifa);
rtinit_locked(&(ia->ia_ifa), (int)RTM_ADD,
RTF_HOST|RTF_UP);
} else {
IFA_UNLOCK(&ia->ia_ifa);
}
lck_mtx_unlock(rnh_lock);
break;
case SIOCSIFBRDADDR:
VERIFY(ia != NULL);
if ((ifp->if_flags & IFF_BROADCAST) == 0) {
error = EINVAL;
break;
}
IFA_LOCK(&ia->ia_ifa);
bcopy(&((struct ifreq *)(void *)data)->ifr_broadaddr,
&ia->ia_broadaddr, sizeof (struct sockaddr_in));
ev_msg.vendor_code = KEV_VENDOR_APPLE;
ev_msg.kev_class = KEV_NETWORK_CLASS;
ev_msg.kev_subclass = KEV_INET_SUBCLASS;
ev_msg.event_code = KEV_INET_SIFBRDADDR;
if (ia->ia_ifa.ifa_dstaddr) {
in_event_data.ia_dstaddr = ((struct sockaddr_in *)
(void *)ia->ia_ifa.ifa_dstaddr)->sin_addr;
} else {
in_event_data.ia_dstaddr.s_addr = INADDR_ANY;
}
in_event_data.ia_addr = ia->ia_addr.sin_addr;
in_event_data.ia_net = ia->ia_net;
in_event_data.ia_netmask = ia->ia_netmask;
in_event_data.ia_subnet = ia->ia_subnet;
in_event_data.ia_subnetmask = ia->ia_subnetmask;
in_event_data.ia_netbroadcast = ia->ia_netbroadcast;
IFA_UNLOCK(&ia->ia_ifa);
(void) strncpy(&in_event_data.link_data.if_name[0],
ifp->if_name, IFNAMSIZ);
in_event_data.link_data.if_family = ifp->if_family;
in_event_data.link_data.if_unit = (u_int32_t) ifp->if_unit;
ev_msg.dv[0].data_ptr = &in_event_data;
ev_msg.dv[0].data_length = sizeof (struct kev_in_data);
ev_msg.dv[1].data_length = 0;
kev_post_msg(&ev_msg);
break;
case SIOCSIFADDR: {
struct sockaddr_in addr;
VERIFY(ifp != NULL && ia != NULL);
bcopy(&((struct ifreq *)(void *)data)->ifr_addr,
&addr, sizeof (addr));
error = in_ifinit(ifp, ia, &addr, 1);
#if PF
if (!error)
(void) pf_ifaddr_hook(ifp, cmd);
#endif
break;
}
case SIOCPROTOATTACH:
VERIFY(ifp != NULL);
error = in_domifattach(ifp);
break;
case SIOCPROTODETACH:
VERIFY(ifp != NULL);
ifnet_lock_shared(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
IFA_LOCK(ifa);
if (ifa->ifa_addr->sa_family == AF_INET) {
IFA_UNLOCK(ifa);
break;
}
IFA_UNLOCK(ifa);
}
ifnet_lock_done(ifp);
if (ifa != NULL) {
error = EBUSY;
break;
}
error = proto_unplumb(PF_INET, ifp);
break;
case SIOCSETROUTERMODE: {
int intval;
VERIFY(ifp != NULL);
bcopy(&((struct ifreq *)(void *)data)->ifr_intval,
&intval, sizeof (intval));
error = in_setrouter(ifp, intval);
break;
}
case SIOCSIFNETMASK: {
struct sockaddr_in addr;
in_addr_t i;
VERIFY(ifp != NULL && ia != NULL);
bcopy(&((struct ifreq *)(void *)data)->ifr_addr,
&addr, sizeof (addr));
i = addr.sin_addr.s_addr;
IFA_LOCK(&ia->ia_ifa);
ia->ia_subnetmask = ntohl(ia->ia_sockmask.sin_addr.s_addr = i);
ev_msg.vendor_code = KEV_VENDOR_APPLE;
ev_msg.kev_class = KEV_NETWORK_CLASS;
ev_msg.kev_subclass = KEV_INET_SUBCLASS;
ev_msg.event_code = KEV_INET_SIFNETMASK;
if (ia->ia_ifa.ifa_dstaddr) {
in_event_data.ia_dstaddr = ((struct sockaddr_in *)
(void *)ia->ia_ifa.ifa_dstaddr)->sin_addr;
} else {
in_event_data.ia_dstaddr.s_addr = INADDR_ANY;
}
in_event_data.ia_addr = ia->ia_addr.sin_addr;
in_event_data.ia_net = ia->ia_net;
in_event_data.ia_netmask = ia->ia_netmask;
in_event_data.ia_subnet = ia->ia_subnet;
in_event_data.ia_subnetmask = ia->ia_subnetmask;
in_event_data.ia_netbroadcast = ia->ia_netbroadcast;
IFA_UNLOCK(&ia->ia_ifa);
(void) strncpy(&in_event_data.link_data.if_name[0],
ifp->if_name, IFNAMSIZ);
in_event_data.link_data.if_family = ifp->if_family;
in_event_data.link_data.if_unit = (u_int32_t) ifp->if_unit;
ev_msg.dv[0].data_ptr = &in_event_data;
ev_msg.dv[0].data_length = sizeof (struct kev_in_data);
ev_msg.dv[1].data_length = 0;
kev_post_msg(&ev_msg);
break;
}
case SIOCAIFADDR: {
struct sockaddr_in addr, broadaddr, mask;
VERIFY(ifp != NULL && ia != NULL);
bcopy(&((struct ifaliasreq *)(void *)data)->ifra_addr,
&addr, sizeof (addr));
bcopy(&((struct ifaliasreq *)(void *)data)->ifra_broadaddr,
&broadaddr, sizeof (broadaddr));
bcopy(&((struct ifaliasreq *)(void *)data)->ifra_mask,
&mask, sizeof (mask));
maskIsNew = 0;
hostIsNew = 1;
error = 0;
IFA_LOCK(&ia->ia_ifa);
if (ia->ia_addr.sin_family == AF_INET) {
if (addr.sin_len == 0) {
addr = ia->ia_addr;
hostIsNew = 0;
} else if (addr.sin_addr.s_addr ==
ia->ia_addr.sin_addr.s_addr) {
hostIsNew = 0;
}
}
if (mask.sin_len) {
IFA_UNLOCK(&ia->ia_ifa);
in_ifscrub(ifp, ia, 0);
IFA_LOCK(&ia->ia_ifa);
ia->ia_sockmask = mask;
ia->ia_subnetmask =
ntohl(ia->ia_sockmask.sin_addr.s_addr);
maskIsNew = 1;
}
if ((ifp->if_flags & IFF_POINTOPOINT) &&
(broadaddr.sin_family == AF_INET)) {
IFA_UNLOCK(&ia->ia_ifa);
in_ifscrub(ifp, ia, 0);
IFA_LOCK(&ia->ia_ifa);
ia->ia_dstaddr = broadaddr;
ia->ia_dstaddr.sin_len = sizeof (struct sockaddr_in);
maskIsNew = 1;
}
if (addr.sin_family == AF_INET && (hostIsNew || maskIsNew)) {
IFA_UNLOCK(&ia->ia_ifa);
error = in_ifinit(ifp, ia, &addr, 0);
} else {
IFA_UNLOCK(&ia->ia_ifa);
}
#if PF
if (!error)
(void) pf_ifaddr_hook(ifp, cmd);
#endif
IFA_LOCK(&ia->ia_ifa);
if ((ifp->if_flags & IFF_BROADCAST) &&
(broadaddr.sin_family == AF_INET))
ia->ia_broadaddr = broadaddr;
if ((error == 0) || (error == EEXIST)) {
ev_msg.vendor_code = KEV_VENDOR_APPLE;
ev_msg.kev_class = KEV_NETWORK_CLASS;
ev_msg.kev_subclass = KEV_INET_SUBCLASS;
if (hostIsNew)
ev_msg.event_code = KEV_INET_NEW_ADDR;
else
ev_msg.event_code = KEV_INET_CHANGED_ADDR;
if (ia->ia_ifa.ifa_dstaddr) {
in_event_data.ia_dstaddr =
((struct sockaddr_in *)(void *)ia->
ia_ifa.ifa_dstaddr)->sin_addr;
} else {
in_event_data.ia_dstaddr.s_addr = INADDR_ANY;
}
in_event_data.ia_addr = ia->ia_addr.sin_addr;
in_event_data.ia_net = ia->ia_net;
in_event_data.ia_netmask = ia->ia_netmask;
in_event_data.ia_subnet = ia->ia_subnet;
in_event_data.ia_subnetmask = ia->ia_subnetmask;
in_event_data.ia_netbroadcast = ia->ia_netbroadcast;
IFA_UNLOCK(&ia->ia_ifa);
(void) strncpy(&in_event_data.link_data.if_name[0],
ifp->if_name, IFNAMSIZ);
in_event_data.link_data.if_family = ifp->if_family;
in_event_data.link_data.if_unit = ifp->if_unit;
ev_msg.dv[0].data_ptr = &in_event_data;
ev_msg.dv[0].data_length = sizeof (struct kev_in_data);
ev_msg.dv[1].data_length = 0;
kev_post_msg(&ev_msg);
} else {
IFA_UNLOCK(&ia->ia_ifa);
}
break;
}
case SIOCDIFADDR:
VERIFY(ifp != NULL && ia != NULL);
error = ifnet_ioctl(ifp, PF_INET, SIOCDIFADDR, ia);
if (error == EOPNOTSUPP)
error = 0;
if (error != 0) {
break;
}
ev_msg.vendor_code = KEV_VENDOR_APPLE;
ev_msg.kev_class = KEV_NETWORK_CLASS;
ev_msg.kev_subclass = KEV_INET_SUBCLASS;
ev_msg.event_code = KEV_INET_ADDR_DELETED;
IFA_LOCK(&ia->ia_ifa);
if (ia->ia_ifa.ifa_dstaddr) {
in_event_data.ia_dstaddr = ((struct sockaddr_in *)
(void *)ia->ia_ifa.ifa_dstaddr)->sin_addr;
} else {
in_event_data.ia_dstaddr.s_addr = INADDR_ANY;
}
in_event_data.ia_addr = ia->ia_addr.sin_addr;
in_event_data.ia_net = ia->ia_net;
in_event_data.ia_netmask = ia->ia_netmask;
in_event_data.ia_subnet = ia->ia_subnet;
in_event_data.ia_subnetmask = ia->ia_subnetmask;
in_event_data.ia_netbroadcast = ia->ia_netbroadcast;
IFA_UNLOCK(&ia->ia_ifa);
(void) strncpy(&in_event_data.link_data.if_name[0],
ifp->if_name, IFNAMSIZ);
in_event_data.link_data.if_family = ifp->if_family;
in_event_data.link_data.if_unit = (u_int32_t) ifp->if_unit;
ev_msg.dv[0].data_ptr = &in_event_data;
ev_msg.dv[0].data_length = sizeof(struct kev_in_data);
ev_msg.dv[1].data_length = 0;
ifa = &ia->ia_ifa;
lck_rw_lock_exclusive(in_ifaddr_rwlock);
IFA_REMREF(ifa);
TAILQ_REMOVE(&in_ifaddrhead, ia, ia_link);
IFA_LOCK(ifa);
if (IA_IS_HASHED(ia))
in_iahash_remove(ia);
IFA_UNLOCK(ifa);
lck_rw_done(in_ifaddr_rwlock);
in_ifscrub(ifp, ia, 0);
ifnet_lock_exclusive(ifp);
IFA_LOCK(ifa);
if_detach_ifa(ifp, ifa);
IFA_UNLOCK(ifa);
if ((ifp->if_flags & IFF_MULTICAST) != 0 ||
ifp->if_allhostsinm != NULL ) {
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
IFA_LOCK(ifa);
if (ifa->ifa_addr->sa_family == AF_INET) {
IFA_UNLOCK(ifa);
break;
}
IFA_UNLOCK(ifa);
}
ifnet_lock_done(ifp);
lck_mtx_lock(&ifp->if_addrconfig_lock);
if (ifa == NULL && ifp->if_allhostsinm != NULL) {
struct in_multi *inm = ifp->if_allhostsinm;
ifp->if_allhostsinm = NULL;
in_delmulti(inm);
INM_REMREF(inm);
}
lck_mtx_unlock(&ifp->if_addrconfig_lock);
} else {
ifnet_lock_done(ifp);
}
kev_post_msg(&ev_msg);
ifa = ifa_ifpgetprimary(ifp, AF_INET);
if (ifa != NULL) {
error = ifnet_ioctl(ifp, PF_INET, SIOCSIFADDR, ifa);
if (error == EOPNOTSUPP)
error = 0;
IFA_REMREF(ifa);
}
#if PF
(void) pf_ifaddr_hook(ifp, cmd);
#endif
break;
#ifdef __APPLE__
case SIOCSETOT: {
struct inpcb *inp, *cloned_inp;
int error2 = 0;
int cloned_fd;
bcopy(data, &cloned_fd, sizeof (cloned_fd));
inp = sotoinpcb(so);
if (inp == NULL) {
break;
}
if (cloned_fd != -1) {
struct socket *cloned_so;
error2 = file_socket(cloned_fd, &cloned_so);
if (error2) {
break;
}
cloned_inp = sotoinpcb(cloned_so);
file_drop(cloned_fd);
} else {
cloned_inp = NULL;
}
if (cloned_inp == NULL) {
inp->inp_flags &= ~(INP_LOWPORT);
inp->inp_flags |= INP_HIGHPORT;
if (so->so_type == SOCK_DGRAM)
so->so_options |= SO_BROADCAST;
else if (so->so_type == SOCK_STREAM)
so->so_options |= SO_WANTOOBFLAG;
} else {
inp->inp_ip_tos = cloned_inp->inp_ip_tos;
inp->inp_ip_ttl = cloned_inp->inp_ip_ttl;
inp->inp_flags = cloned_inp->inp_flags;
if (cloned_inp->inp_moptions != NULL)
error2 = imo_clone(cloned_inp, inp);
}
break;
}
#endif
default:
error = EOPNOTSUPP;
}
done:
if (ia != NULL) {
IFA_REMREF(&ia->ia_ifa);
}
return (error);
}
static int
in_lifaddr_ioctl(struct socket *so, u_long cmd, struct if_laddrreq *iflr,
struct ifnet *ifp, struct proc *p)
{
struct ifaddr *ifa;
VERIFY(ifp != NULL);
switch (cmd) {
case SIOCGLIFADDR:
if ((iflr->flags & IFLR_PREFIX) == 0)
break;
case SIOCALIFADDR:
case SIOCDLIFADDR:
if (iflr->addr.ss_family != AF_INET)
return EINVAL;
if (iflr->addr.ss_len != sizeof(struct sockaddr_in))
return EINVAL;
if (iflr->dstaddr.ss_family
&& iflr->dstaddr.ss_family != AF_INET)
return EINVAL;
if (iflr->dstaddr.ss_family
&& iflr->dstaddr.ss_len != sizeof(struct sockaddr_in))
return EINVAL;
break;
default:
return EOPNOTSUPP;
}
if (sizeof(struct in_addr) * 8 < iflr->prefixlen)
return EINVAL;
switch (cmd) {
case SIOCALIFADDR:
{
struct in_aliasreq ifra;
if (iflr->flags & IFLR_PREFIX)
return EINVAL;
bzero(&ifra, sizeof(ifra));
bcopy(iflr->iflr_name, ifra.ifra_name,
sizeof(ifra.ifra_name));
bcopy(&iflr->addr, &ifra.ifra_addr, iflr->addr.ss_len);
if (iflr->dstaddr.ss_family) {
bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
iflr->dstaddr.ss_len);
}
ifra.ifra_mask.sin_family = AF_INET;
ifra.ifra_mask.sin_len = sizeof(struct sockaddr_in);
in_len2mask(&ifra.ifra_mask.sin_addr, iflr->prefixlen);
return in_control(so, SIOCAIFADDR, (caddr_t)&ifra, ifp, p);
}
case SIOCGLIFADDR:
case SIOCDLIFADDR:
{
struct in_ifaddr *ia;
struct in_addr mask, candidate;
struct in_addr match = { 0 };
struct sockaddr_in *sin;
int cmp;
bzero(&mask, sizeof(mask));
if (iflr->flags & IFLR_PREFIX) {
in_len2mask(&mask, iflr->prefixlen);
sin = (struct sockaddr_in *)&iflr->addr;
match.s_addr = sin->sin_addr.s_addr;
match.s_addr &= mask.s_addr;
if (match.s_addr != sin->sin_addr.s_addr)
return EINVAL;
cmp = 1;
} else {
if (cmd == SIOCGLIFADDR) {
cmp = 0;
} else {
in_len2mask(&mask, 32);
sin = (struct sockaddr_in *)&iflr->addr;
match.s_addr = sin->sin_addr.s_addr;
cmp = 1;
}
}
ifnet_lock_shared(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
IFA_LOCK(ifa);
if (ifa->ifa_addr->sa_family != AF_INET6) {
IFA_UNLOCK(ifa);
continue;
}
if (!cmp) {
IFA_UNLOCK(ifa);
break;
}
candidate.s_addr = ((struct sockaddr_in *)&ifa->ifa_addr)->sin_addr.s_addr;
candidate.s_addr &= mask.s_addr;
IFA_UNLOCK(ifa);
if (candidate.s_addr == match.s_addr)
break;
}
if (ifa != NULL)
IFA_ADDREF(ifa);
ifnet_lock_done(ifp);
if (!ifa)
return EADDRNOTAVAIL;
ia = (struct in_ifaddr *)ifa;
if (cmd == SIOCGLIFADDR) {
IFA_LOCK(ifa);
bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin_len);
if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
ia->ia_dstaddr.sin_len);
} else
bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
iflr->prefixlen =
in_mask2len(&ia->ia_sockmask.sin_addr);
iflr->flags = 0;
IFA_UNLOCK(ifa);
IFA_REMREF(ifa);
return 0;
} else {
struct in_aliasreq ifra;
bzero(&ifra, sizeof(ifra));
bcopy(iflr->iflr_name, ifra.ifra_name,
sizeof(ifra.ifra_name));
IFA_LOCK(ifa);
bcopy(&ia->ia_addr, &ifra.ifra_addr,
ia->ia_addr.sin_len);
if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
ia->ia_dstaddr.sin_len);
}
bcopy(&ia->ia_sockmask, &ifra.ifra_dstaddr,
ia->ia_sockmask.sin_len);
IFA_UNLOCK(ifa);
IFA_REMREF(ifa);
return in_control(so, SIOCDIFADDR, (caddr_t)&ifra,
ifp, p);
}
}
}
return EOPNOTSUPP;
}
static int
in_setrouter(struct ifnet *ifp, int enable)
{
if (ifp->if_flags & IFF_LOOPBACK)
return (ENODEV);
ifnet_lock_exclusive(ifp);
if (enable) {
ifp->if_eflags |= IFEF_IPV4_ROUTER;
ifp->if_eflags &= ~(IFEF_ARPLL | IFEF_AUTOCONFIGURING);
} else {
ifp->if_eflags &= ~IFEF_IPV4_ROUTER;
}
ifnet_lock_done(ifp);
in_purgeaddrs(ifp);
return (0);
}
void
in_ifscrub(struct ifnet *ifp, struct in_ifaddr *ia, int locked)
{
IFA_LOCK(&ia->ia_ifa);
if ((ia->ia_flags & IFA_ROUTE) == 0) {
IFA_UNLOCK(&ia->ia_ifa);
return;
}
IFA_UNLOCK(&ia->ia_ifa);
if (!locked)
lck_mtx_lock(rnh_lock);
if (ifp->if_flags & (IFF_LOOPBACK|IFF_POINTOPOINT))
rtinit_locked(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
else
rtinit_locked(&(ia->ia_ifa), (int)RTM_DELETE, 0);
IFA_LOCK(&ia->ia_ifa);
ia->ia_flags &= ~IFA_ROUTE;
IFA_UNLOCK(&ia->ia_ifa);
if (!locked)
lck_mtx_unlock(rnh_lock);
}
static void
in_iahash_remove(struct in_ifaddr *ia)
{
lck_rw_assert(in_ifaddr_rwlock, LCK_RW_ASSERT_EXCLUSIVE);
IFA_LOCK_ASSERT_HELD(&ia->ia_ifa);
if (!IA_IS_HASHED(ia)) {
panic("attempt to remove wrong ia %p from hash table\n", ia);
}
TAILQ_REMOVE(INADDR_HASH(ia->ia_addr.sin_addr.s_addr), ia, ia_hash);
IA_HASH_INIT(ia);
if (IFA_REMREF_LOCKED(&ia->ia_ifa) == NULL) {
panic("%s: unexpected (missing) refcnt ifa=%p", __func__,
&ia->ia_ifa);
}
}
static void
in_iahash_insert(struct in_ifaddr *ia)
{
lck_rw_assert(in_ifaddr_rwlock, LCK_RW_ASSERT_EXCLUSIVE);
IFA_LOCK_ASSERT_HELD(&ia->ia_ifa);
if (ia->ia_addr.sin_family != AF_INET) {
panic("attempt to insert wrong ia %p into hash table\n", ia);
} else if (IA_IS_HASHED(ia)) {
panic("attempt to double-insert ia %p into hash table\n", ia);
}
TAILQ_INSERT_HEAD(INADDR_HASH(ia->ia_addr.sin_addr.s_addr), ia, ia_hash);
IFA_ADDREF_LOCKED(&ia->ia_ifa);
}
static void
in_iahash_insert_ptp(struct in_ifaddr *ia)
{
struct in_ifaddr *tmp_ifa;
struct ifnet *tmp_ifp;
lck_rw_assert(in_ifaddr_rwlock, LCK_RW_ASSERT_EXCLUSIVE);
IFA_LOCK_ASSERT_HELD(&ia->ia_ifa);
if (ia->ia_addr.sin_family != AF_INET) {
panic("attempt to insert wrong ia %p into hash table\n", ia);
} else if (IA_IS_HASHED(ia)) {
panic("attempt to double-insert ia %p into hash table\n", ia);
}
IFA_UNLOCK(&ia->ia_ifa);
TAILQ_FOREACH(tmp_ifa, INADDR_HASH(ia->ia_addr.sin_addr.s_addr),
ia_hash) {
IFA_LOCK(&tmp_ifa->ia_ifa);
if (IA_SIN(tmp_ifa)->sin_addr.s_addr ==
ia->ia_addr.sin_addr.s_addr) {
IFA_UNLOCK(&tmp_ifa->ia_ifa);
break;
}
IFA_UNLOCK(&tmp_ifa->ia_ifa);
}
tmp_ifp = (tmp_ifa == NULL) ? NULL : tmp_ifa->ia_ifp;
IFA_LOCK(&ia->ia_ifa);
if (tmp_ifp == NULL) {
TAILQ_INSERT_HEAD(INADDR_HASH(ia->ia_addr.sin_addr.s_addr),
ia, ia_hash);
} else {
TAILQ_INSERT_TAIL(INADDR_HASH(ia->ia_addr.sin_addr.s_addr),
ia, ia_hash);
}
IFA_ADDREF_LOCKED(&ia->ia_ifa);
}
static int
in_ifinit(
struct ifnet *ifp,
struct in_ifaddr *ia,
struct sockaddr_in *sin,
int scrub)
{
u_int32_t i = ntohl(sin->sin_addr.s_addr);
struct sockaddr_in oldaddr;
int flags = RTF_UP, error;
struct ifaddr *ifa0;
unsigned int cmd;
int oldremoved = 0;
IFA_ADDREF(&ia->ia_ifa);
lck_rw_lock_exclusive(in_ifaddr_rwlock);
IFA_LOCK(&ia->ia_ifa);
oldaddr = ia->ia_addr;
if (IA_IS_HASHED(ia)) {
oldremoved = 1;
in_iahash_remove(ia);
}
ia->ia_addr = *sin;
ia->ia_addr.sin_len = sizeof (*sin);
if ((ifp->if_flags & IFF_POINTOPOINT))
in_iahash_insert_ptp(ia);
else
in_iahash_insert(ia);
IFA_UNLOCK(&ia->ia_ifa);
lck_rw_done(in_ifaddr_rwlock);
ifa0 = ifa_ifpgetprimary(ifp, AF_INET);
cmd = (&ia->ia_ifa == ifa0) ? SIOCSIFADDR : SIOCAIFADDR;
error = ifnet_ioctl(ifp, PF_INET, cmd, ia);
if (error == EOPNOTSUPP)
error = 0;
if (error == 0 && cmd == SIOCAIFADDR) {
error = ifnet_ioctl(ifp, PF_INET, SIOCSIFADDR, ifa0);
if (error == EOPNOTSUPP)
error = 0;
}
IFA_REMREF(ifa0);
if (error) {
lck_rw_lock_exclusive(in_ifaddr_rwlock);
IFA_LOCK(&ia->ia_ifa);
if (IA_IS_HASHED(ia))
in_iahash_remove(ia);
ia->ia_addr = oldaddr;
if (oldremoved) {
if ((ifp->if_flags & IFF_POINTOPOINT))
in_iahash_insert_ptp(ia);
else
in_iahash_insert(ia);
}
IFA_UNLOCK(&ia->ia_ifa);
lck_rw_done(in_ifaddr_rwlock);
IFA_REMREF(&ia->ia_ifa);
return (error);
}
lck_mtx_lock(rnh_lock);
IFA_LOCK(&ia->ia_ifa);
ia->ia_ifa.ifa_debug &= ~IFD_NOTREADY;
if (scrub) {
ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
IFA_UNLOCK(&ia->ia_ifa);
in_ifscrub(ifp, ia, 1);
IFA_LOCK(&ia->ia_ifa);
ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
}
IFA_LOCK_ASSERT_HELD(&ia->ia_ifa);
if (IN_CLASSA(i))
ia->ia_netmask = IN_CLASSA_NET;
else if (IN_CLASSB(i))
ia->ia_netmask = IN_CLASSB_NET;
else
ia->ia_netmask = IN_CLASSC_NET;
if (ia->ia_subnetmask == 0) {
ia->ia_subnetmask = ia->ia_netmask;
ia->ia_sockmask.sin_addr.s_addr = htonl(ia->ia_subnetmask);
} else
ia->ia_netmask &= ia->ia_subnetmask;
ia->ia_net = i & ia->ia_netmask;
ia->ia_subnet = i & ia->ia_subnetmask;
in_socktrim(&ia->ia_sockmask);
ia->ia_ifa.ifa_metric = ifp->if_metric;
if (ifp->if_flags & IFF_BROADCAST) {
ia->ia_broadaddr.sin_addr.s_addr =
htonl(ia->ia_subnet | ~ia->ia_subnetmask);
ia->ia_netbroadcast.s_addr =
htonl(ia->ia_net | ~ ia->ia_netmask);
} else if (ifp->if_flags & IFF_LOOPBACK) {
ia->ia_ifa.ifa_dstaddr = ia->ia_ifa.ifa_addr;
flags |= RTF_HOST;
} else if (ifp->if_flags & IFF_POINTOPOINT) {
if (ia->ia_dstaddr.sin_family != AF_INET) {
IFA_UNLOCK(&ia->ia_ifa);
lck_mtx_unlock(rnh_lock);
IFA_REMREF(&ia->ia_ifa);
return (0);
}
ia->ia_dstaddr.sin_len = sizeof (*sin);
flags |= RTF_HOST;
}
IFA_UNLOCK(&ia->ia_ifa);
if ((error = rtinit_locked(&(ia->ia_ifa), (int)RTM_ADD, flags)) == 0) {
IFA_LOCK(&ia->ia_ifa);
ia->ia_flags |= IFA_ROUTE;
IFA_UNLOCK(&ia->ia_ifa);
}
lck_mtx_unlock(rnh_lock);
if (error == EEXIST)
error = 0;
if (ifp->if_flags & IFF_MULTICAST) {
struct in_addr addr;
lck_mtx_lock(&ifp->if_addrconfig_lock);
addr.s_addr = htonl(INADDR_ALLHOSTS_GROUP);
if (ifp->if_allhostsinm == NULL) {
struct in_multi *inm;
inm = in_addmulti(&addr, ifp);
if (inm != NULL) {
ifp->if_allhostsinm = inm;
} else {
printf("Failed to add membership to all-hosts multicast address on interface %s%d\n", ifp->if_name, ifp->if_unit);
}
}
lck_mtx_unlock(&ifp->if_addrconfig_lock);
}
IFA_REMREF(&ia->ia_ifa);
return (error);
}
int
in_broadcast(struct in_addr in, struct ifnet *ifp)
{
struct ifaddr *ifa;
u_int32_t t;
if (in.s_addr == INADDR_BROADCAST || in.s_addr == INADDR_ANY)
return (1);
if ((ifp->if_flags & IFF_BROADCAST) == 0)
return (0);
t = ntohl(in.s_addr);
#define ia ((struct in_ifaddr *)ifa)
ifnet_lock_shared(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
IFA_LOCK(ifa);
if (ifa->ifa_addr->sa_family == AF_INET &&
(in.s_addr == ia->ia_broadaddr.sin_addr.s_addr ||
in.s_addr == ia->ia_netbroadcast.s_addr ||
t == ia->ia_subnet || t == ia->ia_net) &&
ia->ia_subnetmask != (u_int32_t)0xffffffff) {
IFA_UNLOCK(ifa);
ifnet_lock_done(ifp);
return (1);
}
IFA_UNLOCK(ifa);
}
ifnet_lock_done(ifp);
return (0);
#undef ia
}
void
in_purgeaddrs(struct ifnet *ifp)
{
struct ifaddr **ifap;
int err, i;
err = ifnet_get_address_list_family_internal(ifp, &ifap, AF_INET, 1,
M_WAITOK);
if (err == 0 && ifap != NULL) {
for (i = 0; ifap[i] != NULL; i++) {
struct ifaliasreq ifr;
struct ifaddr *ifa;
ifa = ifap[i];
bzero(&ifr, sizeof (ifr));
IFA_LOCK(ifa);
ifr.ifra_addr = *ifa->ifa_addr;
if (ifa->ifa_dstaddr != NULL)
ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
IFA_UNLOCK(ifa);
err = in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
kernproc);
if (err == EADDRNOTAVAIL)
err = 0;
if (err != 0) {
char s_addr[MAX_IPv4_STR_LEN];
char s_dstaddr[MAX_IPv4_STR_LEN];
struct in_addr *s, *d;
IFA_LOCK(ifa);
s = &((struct sockaddr_in *)
(void *)ifa->ifa_addr)->sin_addr;
d = &((struct sockaddr_in *)
(void *)ifa->ifa_dstaddr)->sin_addr;
(void) inet_ntop(AF_INET, &s->s_addr, s_addr,
sizeof (s_addr));
(void) inet_ntop(AF_INET, &d->s_addr, s_dstaddr,
sizeof (s_dstaddr));
IFA_UNLOCK(ifa);
printf("%s: SIOCDIFADDR ifp=%p ifa_addr=%s "
"ifa_dstaddr=%s (err=%d)\n", __func__, ifp,
s_addr, s_dstaddr, err);
}
}
ifnet_free_address_list(ifap);
} else if (err != 0 && err != ENXIO) {
printf("%s: error retrieving list of AF_INET addresses for "
"ifp=%p (err=%d)\n", __func__, ifp, err);
}
}
int inet_aton(char *cp, struct in_addr *pin);
int
inet_aton(char * cp, struct in_addr * pin)
{
u_char * b = (unsigned char *)pin;
int i;
char * p;
for (p = cp, i = 0; i < 4; i++) {
u_int32_t l = strtoul(p, 0, 0);
if (l > 255)
return (FALSE);
b[i] = l;
p = strchr(p, '.');
if (i < 3 && p == NULL)
return (FALSE);
p++;
}
return (TRUE);
}
int inet_ntoa2(struct in_addr * pin, char * cp, const int len);
int inet_ntoa2(struct in_addr * pin, char * cp, const int len)
{
int ret;
ret = snprintf(cp, len, "%u.%u.%u.%u", pin->s_addr & 0xFF,
(pin->s_addr >> 8) & 0xFF, (pin->s_addr >> 16) & 0xFF,
(pin->s_addr >> 24) & 0xFF);
return ret < len ? TRUE : FALSE;
}
void
in_ifaddr_init(void)
{
in_multi_init();
PE_parse_boot_argn("ifa_debug", &inifa_debug, sizeof (inifa_debug));
inifa_size = (inifa_debug == 0) ? sizeof (struct in_ifaddr) :
sizeof (struct in_ifaddr_dbg);
inifa_zone = zinit(inifa_size, INIFA_ZONE_MAX * inifa_size,
0, INIFA_ZONE_NAME);
if (inifa_zone == NULL) {
panic("%s: failed allocating %s", __func__, INIFA_ZONE_NAME);
}
zone_change(inifa_zone, Z_EXPAND, TRUE);
zone_change(inifa_zone, Z_CALLERACCT, FALSE);
lck_mtx_init(&inifa_trash_lock, ifa_mtx_grp, ifa_mtx_attr);
TAILQ_INIT(&inifa_trash_head);
}
static struct in_ifaddr *
in_ifaddr_alloc(int how)
{
struct in_ifaddr *inifa;
inifa = (how == M_WAITOK) ? zalloc(inifa_zone) :
zalloc_noblock(inifa_zone);
if (inifa != NULL) {
bzero(inifa, inifa_size);
inifa->ia_ifa.ifa_free = in_ifaddr_free;
inifa->ia_ifa.ifa_debug |= IFD_ALLOC;
ifa_lock_init(&inifa->ia_ifa);
if (inifa_debug != 0) {
struct in_ifaddr_dbg *inifa_dbg =
(struct in_ifaddr_dbg *)inifa;
inifa->ia_ifa.ifa_debug |= IFD_DEBUG;
inifa->ia_ifa.ifa_trace = in_ifaddr_trace;
inifa->ia_ifa.ifa_attached = in_ifaddr_attached;
inifa->ia_ifa.ifa_detached = in_ifaddr_detached;
ctrace_record(&inifa_dbg->inifa_alloc);
}
}
return (inifa);
}
static void
in_ifaddr_free(struct ifaddr *ifa)
{
IFA_LOCK_ASSERT_HELD(ifa);
if (ifa->ifa_refcnt != 0) {
panic("%s: ifa %p bad ref cnt", __func__, ifa);
} if (!(ifa->ifa_debug & IFD_ALLOC)) {
panic("%s: ifa %p cannot be freed", __func__, ifa);
}
if (ifa->ifa_debug & IFD_DEBUG) {
struct in_ifaddr_dbg *inifa_dbg = (struct in_ifaddr_dbg *)ifa;
ctrace_record(&inifa_dbg->inifa_free);
bcopy(&inifa_dbg->inifa, &inifa_dbg->inifa_old,
sizeof (struct in_ifaddr));
if (ifa->ifa_debug & IFD_TRASHED) {
IFA_CONVERT_LOCK(ifa);
lck_mtx_lock(&inifa_trash_lock);
TAILQ_REMOVE(&inifa_trash_head, inifa_dbg,
inifa_trash_link);
lck_mtx_unlock(&inifa_trash_lock);
ifa->ifa_debug &= ~IFD_TRASHED;
}
}
IFA_UNLOCK(ifa);
ifa_lock_destroy(ifa);
bzero(ifa, sizeof (struct in_ifaddr));
zfree(inifa_zone, ifa);
}
static void
in_ifaddr_attached(struct ifaddr *ifa)
{
struct in_ifaddr_dbg *inifa_dbg = (struct in_ifaddr_dbg *)ifa;
IFA_LOCK_ASSERT_HELD(ifa);
if (!(ifa->ifa_debug & IFD_DEBUG)) {
panic("%s: ifa %p has no debug structure", __func__, ifa);
}
if (ifa->ifa_debug & IFD_TRASHED) {
IFA_CONVERT_LOCK(ifa);
lck_mtx_lock(&inifa_trash_lock);
TAILQ_REMOVE(&inifa_trash_head, inifa_dbg, inifa_trash_link);
lck_mtx_unlock(&inifa_trash_lock);
ifa->ifa_debug &= ~IFD_TRASHED;
}
}
static void
in_ifaddr_detached(struct ifaddr *ifa)
{
struct in_ifaddr_dbg *inifa_dbg = (struct in_ifaddr_dbg *)ifa;
IFA_LOCK_ASSERT_HELD(ifa);
if (!(ifa->ifa_debug & IFD_DEBUG)) {
panic("%s: ifa %p has no debug structure", __func__, ifa);
} else if (ifa->ifa_debug & IFD_TRASHED) {
panic("%s: ifa %p is already in trash list", __func__, ifa);
}
ifa->ifa_debug |= IFD_TRASHED;
IFA_CONVERT_LOCK(ifa);
lck_mtx_lock(&inifa_trash_lock);
TAILQ_INSERT_TAIL(&inifa_trash_head, inifa_dbg, inifa_trash_link);
lck_mtx_unlock(&inifa_trash_lock);
}
static void
in_ifaddr_trace(struct ifaddr *ifa, int refhold)
{
struct in_ifaddr_dbg *inifa_dbg = (struct in_ifaddr_dbg *)ifa;
ctrace_t *tr;
u_int32_t idx;
u_int16_t *cnt;
if (!(ifa->ifa_debug & IFD_DEBUG)) {
panic("%s: ifa %p has no debug structure", __func__, ifa);
}
if (refhold) {
cnt = &inifa_dbg->inifa_refhold_cnt;
tr = inifa_dbg->inifa_refhold;
} else {
cnt = &inifa_dbg->inifa_refrele_cnt;
tr = inifa_dbg->inifa_refrele;
}
idx = atomic_add_16_ov(cnt, 1) % INIFA_TRACE_HIST_SIZE;
ctrace_record(&tr[idx]);
}