static void
test_sinlge_port_basic(void)
{
int port = 0;
uint16_t vlan = 0;
uint16_t vrf = 1;
uint32_t ifaddr = 0x650AA8C0; /* C0.A8.0A.65 = 192.168.10.101 */
int masklen = 24;
uint32_t bcast = ifaddr | odp_cpu_to_be_32(0xFF);
struct ofp_ifnet *dev;
struct ofp_nh_entry *nh;
const char *res;
res = ofp_config_interface_up_v4(port, vlan, vrf, ifaddr, masklen);
CU_ASSERT_PTR_NULL_FATAL(res);
dev = ofp_get_ifnet(port, vlan);
assert_dev(dev, port, vlan, vrf, ifaddr, ifmtu, masklen, bcast,
link_local);
nh = ofp_get_next_hop(vrf, ifaddr, NULL);
assert_next_hop(nh, 0, port, vlan);
res = ofp_config_interface_down(port, vlan);
CU_ASSERT_PTR_NULL_FATAL(res);
dev = ofp_get_ifnet(port, vlan);
assert_dev(dev, port, vlan, vrf, 0, ifmtu, masklen, bcast, link_local);
nh = ofp_get_next_hop(vrf, ifaddr, NULL);
CU_ASSERT_PTR_NULL(nh);
}
static void
test_two_ports_vlan(void)
{
int port = 0;
uint16_t vlan = 0, vlan1 = 100;
uint16_t vrf = 1, vrf1 = 2;
uint32_t ifaddr = 0x650AA8C0; /* C0.A8.0A.65 = 192.168.10.101 */
uint32_t ifaddr1 = 0x650AA8C1;
int masklen = 24, masklen1 = 20;
uint32_t bcast = ifaddr | odp_cpu_to_be_32(0xFF);
uint32_t bcast1 = ifaddr1 | odp_cpu_to_be_32(0xFFF);
struct ofp_ifnet *dev;
struct ofp_nh_entry *nh;
const char *res;
res = ofp_config_interface_up_v4(port, vlan, vrf, ifaddr, masklen);
CU_ASSERT_PTR_NULL_FATAL(res);
res = ofp_config_interface_up_v4(port, vlan1, vrf1, ifaddr1, masklen1);
CU_ASSERT_PTR_NULL_FATAL(res);
dev = ofp_get_ifnet(port, vlan);
CU_ASSERT_PTR_NOT_NULL_FATAL(dev);
assert_dev(dev, port, vlan, vrf, ifaddr, ifmtu, masklen, bcast,
link_local);
nh = ofp_get_next_hop(vrf, ifaddr, NULL);
assert_next_hop(nh, 0, port, vlan);
dev = ofp_get_ifnet(port, vlan1);
assert_dev(dev, port, vlan1, vrf1, ifaddr1, ifmtu, masklen1, bcast1,
link_local);
nh = ofp_get_next_hop(vrf1, ifaddr1, NULL);
assert_next_hop(nh, 0, port, vlan1);
res = ofp_config_interface_down(port, vlan);
CU_ASSERT_PTR_NULL_FATAL(res);
res = ofp_config_interface_down(port, vlan1);
CU_ASSERT_PTR_NULL_FATAL(res);
dev = ofp_get_ifnet(port, vlan);
assert_dev(dev, port, vlan, vrf, 0, ifmtu, masklen, bcast, link_local);
nh = ofp_get_next_hop(vrf, ifaddr, NULL);
CU_ASSERT_PTR_NULL(nh);
dev = ofp_get_ifnet(port, vlan1);
CU_ASSERT_PTR_NULL_FATAL(dev);
nh = ofp_get_next_hop(vrf1, ifaddr1, NULL);
CU_ASSERT_PTR_NULL(nh);
}
static enum ofp_return_code ofp_output_ipv4_to_gre(
odp_packet_t pkt, struct ofp_ifnet *dev_gre,
uint16_t vrfid, struct ofp_nh_entry **nh_new)
{
struct ofp_ip *ip;
struct ofp_greip *greip;
uint32_t flags;
uint8_t l2_size = 0;
int32_t offset;
*nh_new = ofp_get_next_hop(vrfid, dev_gre->ip_remote, &flags);
if (*nh_new == NULL)
return OFP_PKT_DROP;
ip = odp_packet_l3_ptr(pkt, NULL);
/* Remove eth header, prepend gre + ip */
if (odp_packet_has_l2(pkt))
l2_size = odp_packet_l3_offset(pkt) - odp_packet_l2_offset(pkt);
offset = sizeof(*greip) - l2_size;
if (offset >= 0)
greip = odp_packet_push_head(pkt, offset);
else
greip = odp_packet_pull_head(pkt, -offset);
odp_packet_has_l2_set(pkt, 0);
odp_packet_l3_offset_set(pkt, 0);
if (!greip)
return OFP_PKT_DROP;
greip->gi_flags = 0;
greip->gi_ptype = odp_cpu_to_be_16(OFP_GREPROTO_IP);
greip->gi_i.ip_hl = 5;
greip->gi_i.ip_v = 4;
greip->gi_i.ip_tos = ip->ip_tos;
greip->gi_i.ip_len =
odp_cpu_to_be_16(odp_be_to_cpu_16(ip->ip_len) +
sizeof(*greip));
greip->gi_i.ip_id = ip->ip_id;
greip->gi_i.ip_off = 0;
greip->gi_i.ip_ttl = ip->ip_ttl;
greip->gi_i.ip_p = OFP_IPPROTO_GRE;
greip->gi_i.ip_sum = 0;
greip->gi_i.ip_src.s_addr = dev_gre->ip_local;
greip->gi_i.ip_dst.s_addr = dev_gre->ip_remote;
return OFP_PKT_CONTINUE;
}
static void
test_gre_port(void)
{
int port = 0;
uint16_t vlan = 10;
uint16_t vrf = 1;
uint32_t ifaddr = 0x650AA8C0; /* C0.A8.0A.65 = 192.168.10.101 */
int masklen = 24, gre_ml = 32;
uint16_t greid = 100;
uint32_t greaddr = 0x010A0A0A;
uint32_t grep2p = 0x020A0A0A;
struct ofp_ifnet *dev;
struct ofp_nh_entry *nh;
const char *res;
res = ofp_config_interface_up_v4(port, vlan, vrf, ifaddr, masklen);
CU_ASSERT_PTR_NULL_FATAL(res);
/* Non-existent endpoint in vrf */
res = ofp_config_interface_up_tun(GRE_PORTS, greid, vrf + 1, ifaddr,
ifaddr + 1, greaddr, grep2p,
gre_ml);
CU_ASSERT_PTR_NOT_NULL_FATAL(res);
dev = ofp_get_ifnet(GRE_PORTS, greid);
CU_ASSERT_PTR_NULL_FATAL(dev);
/* Successful test */
res = ofp_config_interface_up_tun(GRE_PORTS, greid, vrf, ifaddr,
ifaddr + 1, grep2p, greaddr,
gre_ml);
CU_ASSERT_PTR_NULL_FATAL(res);
dev = ofp_get_ifnet(GRE_PORTS, greid);
CU_ASSERT_PTR_NOT_NULL_FATAL(dev);
CU_ASSERT_EQUAL(dev->ip_local, ifaddr);
CU_ASSERT_EQUAL(dev->ip_remote, ifaddr + 1);
CU_ASSERT_EQUAL(dev->ip_addr, greaddr);
CU_ASSERT_EQUAL(dev->ip_p2p, grep2p);
CU_ASSERT_EQUAL(dev->masklen, gre_ml);
CU_ASSERT_EQUAL(dev->if_mtu, ifmtu - 24);
nh = ofp_get_next_hop(vrf, grep2p, NULL);
assert_next_hop(nh, 0, GRE_PORTS, greid);
res = ofp_config_interface_down(port, vlan);
CU_ASSERT_PTR_NULL_FATAL(res);
res = ofp_config_interface_down(GRE_PORTS, greid);
CU_ASSERT_PTR_NULL_FATAL(res);
dev = ofp_get_ifnet(GRE_PORTS, greid);
CU_ASSERT_PTR_NULL_FATAL(dev);
}
static void
test_ofp_add_route(uint32_t port, uint32_t vrf, uint32_t vlan,
uint32_t destination, uint32_t mask_len,
uint32_t rt_dst_len, uint32_t gw)
{
/* add/test only IPv4 routes and not IPv6 or DEFAULT routes(rt_dst=0)*/
CU_ASSERT_EQUAL(rt_dst_len, 4);
if (rt_dst_len == 4) {
ofp_set_route_params(OFP_ROUTE_ADD, vrf, vlan, port,
destination, mask_len, gw);
}
uint32_t flags;
struct ofp_nh_entry *node =
ofp_get_next_hop(vrf, destination, &flags);
CU_ASSERT_EQUAL(node->gw, gw);
CU_ASSERT_EQUAL(node->port, port);
CU_ASSERT_EQUAL(node->vlan, vlan);
}
enum ofp_return_code ofp_arp_processing(odp_packet_t *pkt)
{
struct ofp_arphdr *arp;
struct ofp_ifnet *dev = odp_packet_user_ptr(*pkt);
struct ofp_ifnet *outdev = dev;
uint16_t vlan = dev->vlan;
uint8_t inner_from_mac[OFP_ETHER_ADDR_LEN];
uint32_t is_ours;
arp = (struct ofp_arphdr *)odp_packet_l3_ptr(*pkt, NULL);
if (odp_unlikely(arp == NULL)) {
OFP_DBG("arp is NULL");
return OFP_PKT_DROP;
}
/* save the received arp info */
if (odp_be_to_cpu_16(arp->op) == OFP_ARPOP_REPLY)
ofp_add_mac(dev, arp->ip_src, arp->eth_src);
OFP_DBG("Device IP: %s, Packet Dest IP: %s",
ofp_print_ip_addr(dev->ip_addr),
ofp_print_ip_addr(arp->ip_dst));
/* Check for VXLAN interface */
if (odp_unlikely(ofp_if_type(dev) == OFP_IFT_VXLAN)) {
ofp_vxlan_update_devices(*pkt, arp, &vlan, &dev, &outdev,
inner_from_mac);
}
is_ours = dev->ip_addr && dev->ip_addr == (ofp_in_addr_t)(arp->ip_dst);
if (!is_ours && !global_param->arp.check_interface) {
/* This may be for some other local interface. */
uint32_t flags;
struct ofp_nh_entry *nh;
nh = ofp_get_next_hop(dev->vrf, arp->ip_dst, &flags);
if (nh)
is_ours = nh->flags & OFP_RTF_LOCAL;
}
/* on our interface an ARP request */
if (is_ours &&
odp_be_to_cpu_16(arp->op) == OFP_ARPOP_REQUEST) {
struct ofp_arphdr tmp;
struct ofp_ether_header tmp_eth;
struct ofp_ether_vlan_header tmp_eth_vlan;
void *l2_addr = odp_packet_l2_ptr(*pkt, NULL);
struct ofp_ether_header *eth =
(struct ofp_ether_header *)l2_addr;
struct ofp_ether_vlan_header *eth_vlan =
(struct ofp_ether_vlan_header *)l2_addr;
ofp_add_mac(dev, arp->ip_src, arp->eth_src);
if (vlan)
tmp_eth_vlan = *eth_vlan;
else
tmp_eth = *eth;
OFP_DBG("Reply to ARPOP_REQ from ip %s"
#ifdef SP
"on IF %d"
#endif
" mac %s ip %s",
ofp_print_ip_addr(arp->ip_src),
#ifdef SP
dev->linux_index,
#endif
ofp_print_mac(dev->mac),
ofp_print_ip_addr(arp->ip_dst));
tmp = *arp;
tmp.ip_dst = arp->ip_src;
tmp.ip_src = arp->ip_dst;
memcpy(&tmp.eth_dst, &arp->eth_src, OFP_ETHER_ADDR_LEN);
memcpy(&tmp.eth_src, dev->mac, OFP_ETHER_ADDR_LEN);
tmp.op = odp_cpu_to_be_16(OFP_ARPOP_REPLY);
*arp = tmp;
if (vlan) {
memcpy(tmp_eth_vlan.evl_dhost, &arp->eth_dst,
OFP_ETHER_ADDR_LEN);
memcpy(tmp_eth_vlan.evl_shost, &arp->eth_src,
OFP_ETHER_ADDR_LEN);
*eth_vlan = tmp_eth_vlan;
} else {
memcpy(tmp_eth.ether_dhost, &arp->eth_dst,
OFP_ETHER_ADDR_LEN);
memcpy(tmp_eth.ether_shost, &arp->eth_src,
OFP_ETHER_ADDR_LEN);
*eth = tmp_eth;
}
if (odp_unlikely(ofp_if_type(dev) == OFP_IFT_VXLAN)) {
/* Restore the original vxlan header and
update the addresses */
ofp_vxlan_restore_and_update_header
(*pkt, outdev, inner_from_mac);
}
return send_pkt_out(outdev, *pkt);
}
return OFP_PKT_CONTINUE;
}
enum ofp_return_code ofp_ipv4_processing(odp_packet_t *pkt)
{
int frag_res = 0, res;
int protocol = IS_IPV4;
uint32_t flags;
struct ofp_ip *ip;
struct ofp_nh_entry *nh;
struct ofp_ifnet *dev = odp_packet_user_ptr(*pkt);
uint32_t is_ours;
ip = (struct ofp_ip *)odp_packet_l3_ptr(*pkt, NULL);
if (odp_unlikely(ip == NULL)) {
OFP_DBG("ip is NULL");
return OFP_PKT_DROP;
}
if (odp_unlikely(ofp_if_type(dev) == OFP_IFT_VXLAN)) {
struct ofp_packet_user_area *ua;
/* Look for the correct device. */
ua = ofp_packet_user_area(*pkt);
dev = ofp_get_ifnet(VXLAN_PORTS, ua->vxlan.vni);
if (!dev)
return OFP_PKT_DROP;
}
if (odp_unlikely(ip->ip_v != OFP_IPVERSION))
return OFP_PKT_DROP;
if (ofp_packet_user_area(*pkt)->chksum_flags
& OFP_L3_CHKSUM_STATUS_VALID) {
switch (odp_packet_l3_chksum_status(*pkt)) {
case ODP_PACKET_CHKSUM_OK:
break;
case ODP_PACKET_CHKSUM_UNKNOWN:
/* Checksum was not validated by HW */
if (odp_unlikely(ofp_cksum_iph(ip, ip->ip_hl)))
return OFP_PKT_DROP;
break;
case ODP_PACKET_CHKSUM_BAD:
return OFP_PKT_DROP;
break;
}
ofp_packet_user_area(*pkt)->chksum_flags &=
~OFP_L3_CHKSUM_STATUS_VALID;
} else if (odp_unlikely(ofp_cksum_iph(ip, ip->ip_hl)))
return OFP_PKT_DROP;
/* TODO: handle broadcast */
if (dev->bcast_addr == ip->ip_dst.s_addr)
return OFP_PKT_DROP;
OFP_DBG("Device IP: %s, Packet Dest IP: %s",
ofp_print_ip_addr(dev->ip_addr),
ofp_print_ip_addr(ip->ip_dst.s_addr));
is_ours = dev->ip_addr == ip->ip_dst.s_addr ||
OFP_IN_MULTICAST(odp_be_to_cpu_32(ip->ip_dst.s_addr));
if (!is_ours) {
/* This may be for some other local interface. */
nh = ofp_get_next_hop(dev->vrf, ip->ip_dst.s_addr, &flags);
if (nh)
is_ours = nh->flags & OFP_RTF_LOCAL;
}
if (is_ours) {
if (odp_be_to_cpu_16(ip->ip_off) & 0x3fff) {
frag_res = pkt_reassembly(pkt);
if (frag_res != OFP_PKT_CONTINUE)
return frag_res;
ip = (struct ofp_ip *)odp_packet_l3_ptr(*pkt, NULL);
}
OFP_HOOK(OFP_HOOK_LOCAL, *pkt, &protocol, &res);
if (res != OFP_PKT_CONTINUE) {
OFP_DBG("OFP_HOOK_LOCAL returned %d", res);
return res;
}
OFP_HOOK(OFP_HOOK_LOCAL_IPv4, *pkt, NULL, &res);
if (res != OFP_PKT_CONTINUE) {
OFP_DBG("OFP_HOOK_LOCAL_IPv4 returned %d", res);
return res;
}
return ipv4_transport_classifier(pkt, ip->ip_p);
}
OFP_HOOK(OFP_HOOK_FWD_IPv4, *pkt, nh, &res);
if (res != OFP_PKT_CONTINUE) {
OFP_DBG("OFP_HOOK_FWD_IPv4 returned %d", res);
return res;
}
if (nh == NULL) {
OFP_DBG("nh is NULL, vrf=%d dest=%x", dev->vrf, ip->ip_dst.s_addr);
return OFP_PKT_CONTINUE;
}
if (ip->ip_ttl <= 1) {
OFP_DBG("OFP_ICMP_TIMXCEED");
ofp_icmp_error(*pkt, OFP_ICMP_TIMXCEED,
OFP_ICMP_TIMXCEED_INTRANS, 0, 0);
return OFP_PKT_DROP;
}
/*
* Decrement TTL and incrementally change the IP header checksum.
*/
ip->ip_ttl--;
uint16_t a = ~odp_cpu_to_be_16(1 << 8);
if (ip->ip_sum >= a)
ip->ip_sum -= a;
else
ip->ip_sum += odp_cpu_to_be_16(1 << 8);
#ifdef OFP_SEND_ICMP_REDIRECT
/* 1. The interface on which the packet comes into the router is the
* same interface on which the packet gets routed out.
* 2. The subnet or network of the source IP address is on the same
* subnet or network of the next-hop IP address of the routed packet.
* 3. Stack configured to send redirects.
*/
#define INET_SUBNET_PREFIX(addr) \
(odp_be_to_cpu_32(addr) & ((~0) << (32 - dev->masklen)))
if (nh->port == dev->port &&
(INET_SUBNET_PREFIX(ip->ip_src.s_addr) ==
INET_SUBNET_PREFIX(nh->gw))) {
OFP_DBG("send OFP_ICMP_REDIRECT");
ofp_icmp_error(*pkt, OFP_ICMP_REDIRECT,
OFP_ICMP_REDIRECT_HOST, nh->gw, 0);
}
#endif
return ofp_ip_output_common_inline(*pkt, nh, 0);
}
int ofp_ioctl(int sockfd, int request, ...)
{
va_list ap;
void *data;
struct ofp_ifnet *iface = NULL;
struct socket *so = ofp_get_sock_by_fd(sockfd);
if (!so) {
ofp_errno = OFP_EBADF;
return -1;
}
va_start(ap, request);
data = va_arg(ap, void *);
va_end(ap);
if (request == (int)(OFP_SIOCGIFCONF)) {
ofp_errno = ((*so->so_proto->pr_usrreqs->pru_control)
(so, request, data, NULL, NULL));
} else if (OFP_IOCGROUP(request) == 'i') {
/* All the interface requests start with interface name */
int port, vlan = 0;
char *name = data;
if (get_port_vlan_by_name(name, &port, &vlan) < 0) {
ofp_errno = OFP_EBADF;
return -1;
}
if (request == (int)(OFP_SIOCSIFTUN)) {
struct ofp_in_tunreq *treq = data;
const char *retstr =
ofp_config_interface_up_tun
(port, vlan, treq->iftun_vrf,
treq->iftun_local_addr.sin_addr.s_addr,
treq->iftun_remote_addr.sin_addr.s_addr,
treq->iftun_p2p_addr.sin_addr.s_addr,
treq->iftun_addr.sin_addr.s_addr, 30);
if (!retstr)
ofp_errno = 0;
else
ofp_errno = OFP_EBADMSG;
} else {
iface = ofp_get_ifnet(port, vlan);
if (so->so_proto->pr_usrreqs->pru_control)
ofp_errno = ((*so->so_proto->pr_usrreqs->pru_control)
(so, request, data, iface, NULL));
else
ofp_errno = OFP_EOPNOTSUPP;
}
} else if (OFP_IOCGROUP(request) == 'r') {
int port = 0, vlan = 0;
struct ofp_rtentry *rt = data;
uint32_t dst = ((struct ofp_sockaddr_in *)&rt->rt_dst)->sin_addr.s_addr;
uint32_t mask = ((struct ofp_sockaddr_in *)&rt->rt_genmask)->sin_addr.s_addr;
uint32_t gw = ((struct ofp_sockaddr_in *)&rt->rt_gateway)->sin_addr.s_addr;
uint32_t maskcpu = odp_be_to_cpu_32(mask);
uint32_t mlen = 0;
if (request != (int)OFP_SIOCADDRT &&
request != (int)OFP_SIOCDELRT) {
ofp_errno = OFP_EBADF;
return -1;
}
if (request == (int)OFP_SIOCADDRT) {
if (rt->rt_dev) {
if (get_port_vlan_by_name(rt->rt_dev, &port, &vlan) < 0) {
ofp_errno = OFP_EBADF;
return -1;
}
} else {
uint32_t flags;
struct ofp_nh_entry *nh =
ofp_get_next_hop(rt->rt_vrf, gw, &flags);
if (!nh) {
ofp_errno = OFP_EBADF;
return -1;
}
port = nh->port;
vlan = nh->vlan;
}
}
while (maskcpu) {
mlen++;
maskcpu <<= 1;
}
ofp_set_route_params((request == (int) OFP_SIOCADDRT) ? OFP_ROUTE_ADD : OFP_ROUTE_DEL,
rt->rt_vrf, vlan, port,
dst, mlen, gw,
(request == (int) OFP_SIOCADDRT) ?
(gw ? OFP_RTF_GATEWAY : OFP_RTF_NET) : 0);
} else {
ofp_errno = ofp_soo_ioctl(so, request, data, NULL, NULL);
}
if (ofp_errno)
return -1;
return 0;
}
enum ofp_return_code ofp_ipv4_processing(odp_packet_t pkt)
{
int res;
int protocol = IS_IPV4;
uint32_t flags;
struct ofp_ip *ip;
struct ofp_nh_entry *nh;
struct ofp_ifnet *dev = odp_packet_user_ptr(pkt);
uint32_t is_ours;
ip = (struct ofp_ip *)odp_packet_l3_ptr(pkt, NULL);
if (odp_unlikely(ip == NULL)) {
OFP_DBG("ip is NULL");
return OFP_PKT_DROP;
}
if (odp_unlikely(!PHYS_PORT(dev->port))) {
switch (dev->port) {
case GRE_PORTS:
/* Doesn't happen. */
break;
case VXLAN_PORTS: {
/* Look for the correct device. */
struct vxlan_user_data *saved = odp_packet_user_area(pkt);
dev = ofp_get_ifnet(VXLAN_PORTS, saved->vni);
if (!dev)
return OFP_PKT_DROP;
break;
}
}
}
#ifndef OFP_PERFORMANCE
if (odp_unlikely(ip->ip_v != 4))
return OFP_PKT_DROP;
if (odp_unlikely(ofp_cksum_buffer((uint16_t *) ip, ip->ip_hl<<2)))
return OFP_PKT_DROP;
/* TODO: handle broadcast */
if (dev->bcast_addr == ip->ip_dst.s_addr)
return OFP_PKT_DROP;
#endif
OFP_DBG("Device IP: %s, Packet Dest IP: %s",
ofp_print_ip_addr(dev->ip_addr),
ofp_print_ip_addr(ip->ip_dst.s_addr));
is_ours = dev->ip_addr == ip->ip_dst.s_addr ||
OFP_IN_MULTICAST(odp_be_to_cpu_32(ip->ip_dst.s_addr));
if (!is_ours) {
/* This may be for some other local interface. */
nh = ofp_get_next_hop(dev->vrf, ip->ip_dst.s_addr, &flags);
if (nh)
is_ours = nh->flags & OFP_RTF_LOCAL;
}
if (is_ours) {
if (odp_be_to_cpu_16(ip->ip_off) & 0x3fff) {
OFP_UPDATE_PACKET_STAT(rx_ip_frag, 1);
pkt = ofp_ip_reass(pkt);
if (pkt == ODP_PACKET_INVALID)
return OFP_PKT_ON_HOLD;
OFP_UPDATE_PACKET_STAT(rx_ip_reass, 1);
ip = (struct ofp_ip *)odp_packet_l3_ptr(pkt, NULL);
}
OFP_HOOK(OFP_HOOK_LOCAL, pkt, &protocol, &res);
if (res != OFP_PKT_CONTINUE) {
OFP_DBG("OFP_HOOK_LOCAL returned %d", res);
return res;
}
OFP_HOOK(OFP_HOOK_LOCAL_IPv4, pkt, NULL, &res);
if (res != OFP_PKT_CONTINUE) {
OFP_DBG("OFP_HOOK_LOCAL_IPv4 returned %d", res);
return res;
}
return ipv4_transport_classifier(pkt, ip->ip_p);
}
OFP_HOOK(OFP_HOOK_FWD_IPv4, pkt, nh, &res);
if (res != OFP_PKT_CONTINUE) {
OFP_DBG("OFP_HOOK_FWD_IPv4 returned %d", res);
return res;
}
if (nh == NULL) {
OFP_DBG("nh is NULL, vrf=%d dest=%x", dev->vrf, ip->ip_dst.s_addr);
return OFP_PKT_CONTINUE;
}
if (ip->ip_ttl <= 1) {
OFP_DBG("OFP_ICMP_TIMXCEED");
ofp_icmp_error(pkt, OFP_ICMP_TIMXCEED,
OFP_ICMP_TIMXCEED_INTRANS, 0, 0);
return OFP_PKT_DROP;
}
/*
* Decrement TTL and incrementally change the IP header checksum.
*/
ip->ip_ttl--;
uint16_t a = ~odp_cpu_to_be_16(1 << 8);
if (ip->ip_sum >= a)
ip->ip_sum -= a;
else
ip->ip_sum += odp_cpu_to_be_16(1 << 8);
#ifdef OFP_SEND_ICMP_REDIRECT
/* 1. The interface on which the packet comes into the router is the
* same interface on which the packet gets routed out.
* 2. The subnet or network of the source IP address is on the same
* subnet or network of the next-hop IP address of the routed packet.
* 3. Stack configured to send redirects.
*/
#define INET_SUBNET_PREFIX(addr) \
(odp_be_to_cpu_32(addr) & ((~0) << (32 - dev->masklen)))
if (nh->port == dev->port &&
(INET_SUBNET_PREFIX(ip->ip_src.s_addr) ==
INET_SUBNET_PREFIX(nh->gw))) {
OFP_DBG("send OFP_ICMP_REDIRECT");
ofp_icmp_error(pkt, OFP_ICMP_REDIRECT,
OFP_ICMP_REDIRECT_HOST, nh->gw, 0);
}
#endif
return ofp_ip_output(pkt, nh);
}
