/*
* Shared implementation to inject a packet to or from an interface
* Return value:
* 0: successful
* -1: memory allocation failed
* 1: other errors
*/
static int
ip_inject_impl(inject_t style, net_inject_t *packet, boolean_t isv6,
ip_stack_t *ipst)
{
ddi_taskq_t *tq = NULL;
void (* func)(void *);
injection_t *inject;
mblk_t *mp;
ASSERT(packet != NULL);
ASSERT(packet->ni_packet != NULL);
ASSERT(packet->ni_packet->b_datap->db_type == M_DATA);
switch (style) {
case NI_QUEUE_IN:
inject = kmem_alloc(sizeof (*inject), KM_NOSLEEP);
if (inject == NULL)
return (-1);
inject->inj_data = *packet;
inject->inj_isv6 = isv6;
/*
* deliver up into the kernel, immitating its reception by a
* network interface, add to list and schedule timeout
*/
func = ip_ni_queue_in_func;
tq = eventq_queue_in;
break;
case NI_QUEUE_OUT:
inject = kmem_alloc(sizeof (*inject), KM_NOSLEEP);
if (inject == NULL)
return (-1);
inject->inj_data = *packet;
inject->inj_isv6 = isv6;
/*
* deliver out of the kernel, as if it were being sent via a
* raw socket so that IPFilter will see it again, add to list
* and schedule timeout
*/
func = ip_ni_queue_out_func;
tq = eventq_queue_out;
break;
case NI_DIRECT_OUT: {
struct sockaddr *sock;
mp = packet->ni_packet;
sock = (struct sockaddr *)&packet->ni_addr;
/*
* ipfil_sendpkt was provided by surya to ease the
* problems associated with sending out a packet.
*/
switch (ipfil_sendpkt(sock, mp, packet->ni_physical,
netstackid_to_zoneid(
ipst->ips_netstack->netstack_stackid))) {
case 0 :
case EINPROGRESS:
return (0);
case ECOMM :
case ENONET :
return (1);
default :
return (1);
}
/* NOTREACHED */
}
default:
freemsg(packet->ni_packet);
return (1);
}
ASSERT(tq != NULL);
inject->inj_ptr = ipst;
if (ddi_taskq_dispatch(tq, func, (void *)inject,
DDI_SLEEP) == DDI_FAILURE) {
ip2dbg(("ip_inject: ddi_taskq_dispatch failed\n"));
freemsg(packet->ni_packet);
return (1);
}
return (0);
}
zoneid_t
netstack_get_zoneid(netstack_t *ns)
{
return (netstackid_to_zoneid(ns->netstack_stackid));
}
/*
* Find the interface used for traffic to an address.
* For lint reasons, next/next6/sin/sin6 are all declared and assigned
* a value at the top. The alternative would end up with two bunches
* of assignments, with each bunch setting half to NULL.
*/
static phy_if_t
ip_routeto_impl(struct sockaddr *address, struct sockaddr *nexthop,
ip_stack_t *ipst)
{
struct sockaddr_in6 *next6 = (struct sockaddr_in6 *)nexthop;
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)address;
struct sockaddr_in *next = (struct sockaddr_in *)nexthop;
struct sockaddr_in *sin = (struct sockaddr_in *)address;
ire_t *ire;
ire_t *nexthop_ire;
phy_if_t phy_if;
zoneid_t zoneid;
zoneid = netstackid_to_zoneid(ipst->ips_netstack->netstack_stackid);
if (address->sa_family == AF_INET6) {
ire = ire_route_recursive_v6(&sin6->sin6_addr, 0, NULL,
zoneid, NULL, MATCH_IRE_DSTONLY, B_TRUE, 0, ipst, NULL,
NULL, NULL);
} else {
ire = ire_route_recursive_v4(sin->sin_addr.s_addr, 0, NULL,
zoneid, NULL, MATCH_IRE_DSTONLY, B_TRUE, 0, ipst, NULL,
NULL, NULL);
}
ASSERT(ire != NULL);
/*
* For some destinations, we have routes that are dead ends, so
* return to indicate that no physical interface can be used to
* reach the destination.
*/
if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) {
ire_refrele(ire);
return (NULL);
}
nexthop_ire = ire_nexthop(ire);
if (nexthop_ire == NULL) {
ire_refrele(ire);
return (0);
}
if (nexthop_ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) {
ire_refrele(nexthop_ire);
ire_refrele(ire);
return (0);
}
ASSERT(nexthop_ire->ire_ill != NULL);
if (nexthop != NULL) {
if (address->sa_family == AF_INET6) {
next6->sin6_addr = nexthop_ire->ire_addr_v6;
} else {
next->sin_addr.s_addr = nexthop_ire->ire_addr;
}
}
phy_if = (phy_if_t)nexthop_ire->ire_ill->ill_phyint->phyint_ifindex;
ire_refrele(ire);
ire_refrele(nexthop_ire);
return (phy_if);
}
