vec_add2 (nm->addr_pool, a, 1);
a->addr = *addr;
- a->fib_index = ip4_fib_index_from_table_id (vrf_id);
+ a->fib_index = 0;
+ if (vrf_id != ~0)
+ a->fib_index =
+ fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, vrf_id);
#define _(N, i, n, s) \
clib_bitmap_alloc (a->busy_##n##_port_bitmap, 65535);
foreach_snat_protocol
nat64_main_t *nm = &nat64_main;
snat_main_t *sm = &snat_main;
int i;
- snat_address_t *a;
+ snat_address_t *a, *ga = 0;
u32 portnum;
for (i = 0; i < vec_len (nm->addr_pool); i++)
case SNAT_PROTOCOL_##N: \
if (a->busy_##n##_ports < (65535-1024)) \
{ \
- while (1) \
+ if (a->fib_index == fib_index) \
{ \
- portnum = random_u32 (&sm->random_seed); \
- portnum &= 0xFFFF; \
- if (portnum < 1024) \
- continue; \
- if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
- portnum)) \
- continue; \
- clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
- portnum, 1); \
- a->busy_##n##_ports++; \
- *port = portnum; \
- addr->as_u32 = a->addr.as_u32; \
- return 0; \
- } \
+ while (1) \
+ { \
+ portnum = random_u32 (&sm->random_seed); \
+ portnum &= 0xFFFF; \
+ if (portnum < 1024) \
+ continue; \
+ if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
+ portnum)) \
+ continue; \
+ clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
+ portnum, 1); \
+ a->busy_##n##_ports++; \
+ *port = portnum; \
+ addr->as_u32 = a->addr.as_u32; \
+ return 0; \
+ } \
+ } \
+ else if (a->fib_index == 0) \
+ ga = a; \
} \
break;
foreach_snat_protocol
clib_warning ("unknown protocol");
return 1;
}
+ }
+ if (ga)
+ {
+ switch (proto)
+ {
+#define _(N, j, n, s) \
+ case SNAT_PROTOCOL_##N: \
+ while (1) \
+ { \
+ portnum = random_u32 (&sm->random_seed); \
+ portnum &= 0xFFFF; \
+ if (portnum < 1024) \
+ continue; \
+ if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
+ portnum)) \
+ continue; \
+ clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
+ portnum, 1); \
+ a->busy_##n##_ports++; \
+ *port = portnum; \
+ addr->as_u32 = a->addr.as_u32; \
+ return 0; \
+ }
+ break;
+ foreach_snat_protocol
+#undef _
+ default:
+ clib_warning ("unknown protocol");
+ return 1;
+ }
}
+
/* Totally out of translations to use... */
//TODO: IPFix
return 1;
if (ap->fib_index != ~0)
{
fib_table_t *fib;
- fib = fib_table_get (ap->fib_index, FIB_PROTOCOL_IP4);
+ fib = fib_table_get (ap->fib_index, FIB_PROTOCOL_IP6);
if (!fib)
return -1;
vlib_cli_output (vm, " %U tenant VRF: %u", format_ip4_address,
#include <vnet/ip/ip6_to_ip4.h>
#include <vnet/fib/fib_table.h>
+/* *INDENT-OFF* */
+static u8 well_known_prefix[] = {
+ 0x00, 0x64, 0xff, 0x9b,
+ 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00
+};
+/* *INDENT-ON* */
+
typedef struct
{
u32 sw_if_index;
typedef enum
{
- NAT64_IN2OUT_NEXT_LOOKUP,
+ NAT64_IN2OUT_NEXT_IP4_LOOKUP,
+ NAT64_IN2OUT_NEXT_IP6_LOOKUP,
NAT64_IN2OUT_NEXT_DROP,
NAT64_IN2OUT_N_NEXT,
} nat64_in2out_next_t;
vlib_main_t *vm;
} nat64_in2out_set_ctx_t;
+/**
+ * @brief Check whether is a hairpinning.
+ *
+ * If the destination IP address of the packet is an IPv4 address assigned to
+ * the NAT64 itself, then the packet is a hairpin packet.
+ *
+ * param dst_addr Destination address of the packet.
+ *
+ * @returns 1 if hairpinning, otherwise 0.
+ */
+static_always_inline int
+is_hairpinning (ip6_address_t * dst_addr)
+{
+ nat64_main_t *nm = &nat64_main;
+ int i;
+
+ for (i = 0; i < vec_len (nm->addr_pool); i++)
+ {
+ if (nm->addr_pool[i].addr.as_u32 == dst_addr->as_u32[3])
+ return 1;
+ }
+
+ return 0;
+}
+
static int
nat64_in2out_tcp_udp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4,
void *arg)
ip4->dst_address.as_u32 = daddr.ip4.as_u32;
+ if (proto == SNAT_PROTOCOL_TCP)
+ {
+ u16 *checksum;
+ ip_csum_t csum;
+ tcp_header_t *tcp = ip6_next_header (ip6);
+
+ checksum = &tcp->checksum;
+ csum = ip_csum_sub_even (*checksum, sport);
+ csum = ip_csum_add_even (csum, udp->src_port);
+ *checksum = ip_csum_fold (csum);
+ }
+
return 0;
}
else
{
udp_header_t *udp = ip6_next_header (ip6);
+ tcp_header_t *tcp = ip6_next_header (ip6);
+ u16 *checksum;
+ ip_csum_t csum;
+
u16 sport = udp->src_port;
u16 dport = udp->dst_port;
ip4->dst_address.as_u32 = bibe->out_addr.as_u32;
udp->dst_port = bibe->out_port;
ip4->src_address.as_u32 = saddr.ip4.as_u32;
+
+ if (proto == SNAT_PROTOCOL_TCP)
+ checksum = &tcp->checksum;
+ else
+ checksum = &udp->checksum;
+ csum = ip_csum_sub_even (*checksum, dport);
+ csum = ip_csum_add_even (csum, udp->dst_port);
+ *checksum = ip_csum_fold (csum);
}
return 0;
}
+static int
+nat64_in2out_tcp_udp_hairpinning (vlib_main_t * vm, vlib_buffer_t * b,
+ ip6_header_t * ip6)
+{
+ nat64_main_t *nm = &nat64_main;
+ nat64_db_bib_entry_t *bibe;
+ nat64_db_st_entry_t *ste;
+ ip46_address_t saddr, daddr;
+ u32 sw_if_index, fib_index;
+ udp_header_t *udp = ip6_next_header (ip6);
+ tcp_header_t *tcp = ip6_next_header (ip6);
+ snat_protocol_t proto = ip_proto_to_snat_proto (ip6->protocol);
+ u16 sport = udp->src_port;
+ u16 dport = udp->dst_port;
+ u16 *checksum;
+ ip_csum_t csum;
+
+ sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
+ fib_index =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6, sw_if_index);
+
+ saddr.as_u64[0] = ip6->src_address.as_u64[0];
+ saddr.as_u64[1] = ip6->src_address.as_u64[1];
+ daddr.as_u64[0] = ip6->dst_address.as_u64[0];
+ daddr.as_u64[1] = ip6->dst_address.as_u64[1];
+
+ if (proto == SNAT_PROTOCOL_UDP)
+ checksum = &udp->checksum;
+ else
+ checksum = &tcp->checksum;
+
+ csum = ip_csum_sub_even (*checksum, ip6->src_address.as_u64[0]);
+ csum = ip_csum_sub_even (csum, ip6->src_address.as_u64[1]);
+ csum = ip_csum_sub_even (csum, ip6->dst_address.as_u64[0]);
+ csum = ip_csum_sub_even (csum, ip6->dst_address.as_u64[1]);
+ csum = ip_csum_sub_even (csum, sport);
+ csum = ip_csum_sub_even (csum, dport);
+
+ ste =
+ nat64_db_st_entry_find (&nm->db, &saddr, &daddr, sport, dport, proto,
+ fib_index, 1);
+
+ if (ste)
+ {
+ bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index);
+ if (!bibe)
+ return -1;
+ }
+ else
+ {
+ bibe =
+ nat64_db_bib_entry_find (&nm->db, &saddr, sport, proto, fib_index, 1);
+
+ if (!bibe)
+ {
+ u16 out_port;
+ ip4_address_t out_addr;
+ if (nat64_alloc_out_addr_and_port
+ (fib_index, proto, &out_addr, &out_port))
+ return -1;
+
+ bibe =
+ nat64_db_bib_entry_create (&nm->db, &ip6->src_address, &out_addr,
+ sport, clib_host_to_net_u16 (out_port),
+ fib_index, proto, 0);
+ if (!bibe)
+ return -1;
+ }
+
+ ste =
+ nat64_db_st_entry_create (&nm->db, bibe, &ip6->dst_address,
+ &daddr.ip4, dport);
+ if (!ste)
+ return -1;
+ }
+
+ nat64_session_reset_timeout (ste, vm);
+
+ sport = udp->src_port = bibe->out_port;
+ memcpy (&ip6->src_address, well_known_prefix, sizeof (ip6_address_t));
+ saddr.ip6.as_u32[3] = ip6->src_address.as_u32[3] = bibe->out_addr.as_u32;
+
+ saddr.ip6.as_u32[0] = 0;
+ saddr.ip6.as_u32[1] = 0;
+ saddr.ip6.as_u32[2] = 0;
+ daddr.ip6.as_u32[0] = 0;
+ daddr.ip6.as_u32[1] = 0;
+ daddr.ip6.as_u32[2] = 0;
+
+ ste =
+ nat64_db_st_entry_find (&nm->db, &daddr, &saddr, dport, sport, proto, 0,
+ 0);
+
+ if (ste)
+ {
+ bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index);
+ if (!bibe)
+ return -1;
+ }
+ else
+ {
+ bibe = nat64_db_bib_entry_find (&nm->db, &daddr, dport, proto, 0, 0);
+
+ if (!bibe)
+ return -1;
+
+ ste =
+ nat64_db_st_entry_create (&nm->db, bibe, &ip6->src_address,
+ &saddr.ip4, sport);
+ }
+
+ ip6->dst_address.as_u64[0] = bibe->in_addr.as_u64[0];
+ ip6->dst_address.as_u64[1] = bibe->in_addr.as_u64[1];
+ udp->dst_port = bibe->in_port;
+
+ csum = ip_csum_add_even (csum, ip6->src_address.as_u64[0]);
+ csum = ip_csum_add_even (csum, ip6->src_address.as_u64[1]);
+ csum = ip_csum_add_even (csum, ip6->dst_address.as_u64[0]);
+ csum = ip_csum_add_even (csum, ip6->dst_address.as_u64[1]);
+ csum = ip_csum_add_even (csum, udp->src_port);
+ csum = ip_csum_add_even (csum, udp->dst_port);
+ *checksum = ip_csum_fold (csum);
+
+ return 0;
+}
+
+static int
+nat64_in2out_icmp_hairpinning (vlib_main_t * vm, vlib_buffer_t * b,
+ ip6_header_t * ip6)
+{
+ nat64_main_t *nm = &nat64_main;
+ nat64_db_bib_entry_t *bibe;
+ nat64_db_st_entry_t *ste;
+ icmp46_header_t *icmp = ip6_next_header (ip6);
+ ip6_header_t *inner_ip6;
+ ip46_address_t saddr, daddr;
+ u32 sw_if_index, fib_index;
+ snat_protocol_t proto;
+ udp_header_t *udp;
+ tcp_header_t *tcp;
+ u16 *checksum, sport, dport;
+ ip_csum_t csum;
+
+ if (icmp->type == ICMP6_echo_request || icmp->type == ICMP6_echo_reply)
+ return -1;
+
+ inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8);
+
+ proto = ip_proto_to_snat_proto (inner_ip6->protocol);
+
+ if (proto == SNAT_PROTOCOL_ICMP)
+ return -1;
+
+ sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
+ fib_index =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6, sw_if_index);
+
+ saddr.as_u64[0] = inner_ip6->src_address.as_u64[0];
+ saddr.as_u64[1] = inner_ip6->src_address.as_u64[1];
+ daddr.as_u64[0] = inner_ip6->dst_address.as_u64[0];
+ daddr.as_u64[1] = inner_ip6->dst_address.as_u64[1];
+
+ udp = ip6_next_header (inner_ip6);
+ tcp = ip6_next_header (inner_ip6);
+
+ sport = udp->src_port;
+ dport = udp->dst_port;
+
+ if (proto == SNAT_PROTOCOL_UDP)
+ checksum = &udp->checksum;
+ else
+ checksum = &tcp->checksum;
+
+ csum = ip_csum_sub_even (*checksum, inner_ip6->src_address.as_u64[0]);
+ csum = ip_csum_sub_even (csum, inner_ip6->src_address.as_u64[1]);
+ csum = ip_csum_sub_even (csum, inner_ip6->dst_address.as_u64[0]);
+ csum = ip_csum_sub_even (csum, inner_ip6->dst_address.as_u64[1]);
+ csum = ip_csum_sub_even (csum, sport);
+ csum = ip_csum_sub_even (csum, dport);
+
+ ste =
+ nat64_db_st_entry_find (&nm->db, &daddr, &saddr, dport, sport, proto,
+ fib_index, 1);
+ if (!ste)
+ return -1;
+
+ clib_warning ("");
+ bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index);
+ if (!bibe)
+ return -1;
+
+ dport = udp->dst_port = bibe->out_port;
+ memcpy (&inner_ip6->dst_address, well_known_prefix, sizeof (ip6_address_t));
+ daddr.ip6.as_u32[3] = inner_ip6->dst_address.as_u32[3] =
+ bibe->out_addr.as_u32;
+
+ saddr.ip6.as_u32[0] = 0;
+ saddr.ip6.as_u32[1] = 0;
+ saddr.ip6.as_u32[2] = 0;
+ daddr.ip6.as_u32[0] = 0;
+ daddr.ip6.as_u32[1] = 0;
+ daddr.ip6.as_u32[2] = 0;
+
+ ste =
+ nat64_db_st_entry_find (&nm->db, &saddr, &daddr, sport, dport, proto, 0,
+ 0);
+ if (!ste)
+ return -1;
+
+ bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index);
+ if (!bibe)
+ return -1;
+
+ inner_ip6->src_address.as_u64[0] = bibe->in_addr.as_u64[0];
+ inner_ip6->src_address.as_u64[1] = bibe->in_addr.as_u64[1];
+ udp->src_port = bibe->in_port;
+
+ csum = ip_csum_add_even (csum, inner_ip6->src_address.as_u64[0]);
+ csum = ip_csum_add_even (csum, inner_ip6->src_address.as_u64[1]);
+ csum = ip_csum_add_even (csum, inner_ip6->dst_address.as_u64[0]);
+ csum = ip_csum_add_even (csum, inner_ip6->dst_address.as_u64[1]);
+ csum = ip_csum_add_even (csum, udp->src_port);
+ csum = ip_csum_add_even (csum, udp->dst_port);
+ *checksum = ip_csum_fold (csum);
+
+ if (!vec_len (nm->addr_pool))
+ return -1;
+
+ memcpy (&ip6->src_address, well_known_prefix, sizeof (ip6_address_t));
+ ip6->src_address.as_u32[3] = nm->addr_pool[0].addr.as_u32;
+ ip6->dst_address.as_u64[0] = inner_ip6->src_address.as_u64[0];
+ ip6->dst_address.as_u64[1] = inner_ip6->src_address.as_u64[1];
+
+ icmp->checksum = 0;
+ csum = ip_csum_with_carry (0, ip6->payload_length);
+ csum = ip_csum_with_carry (csum, clib_host_to_net_u16 (ip6->protocol));
+ csum = ip_csum_with_carry (csum, ip6->src_address.as_u64[0]);
+ csum = ip_csum_with_carry (csum, ip6->src_address.as_u64[1]);
+ csum = ip_csum_with_carry (csum, ip6->dst_address.as_u64[0]);
+ csum = ip_csum_with_carry (csum, ip6->dst_address.as_u64[1]);
+ csum =
+ ip_incremental_checksum (csum, icmp,
+ clib_net_to_host_u16 (ip6->payload_length));
+ icmp->checksum = ~ip_csum_fold (csum);
+
+ return 0;
+}
+
static uword
nat64_in2out_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame)
ctx0.b = b0;
ctx0.vm = vm;
- next0 = NAT64_IN2OUT_NEXT_LOOKUP;
+ next0 = NAT64_IN2OUT_NEXT_IP4_LOOKUP;
if (PREDICT_FALSE
(ip6_parse
if (proto0 == SNAT_PROTOCOL_ICMP)
{
+ if (is_hairpinning (&ip60->dst_address))
+ {
+ next0 = NAT64_IN2OUT_NEXT_IP6_LOOKUP;
+ if (nat64_in2out_icmp_hairpinning (vm, b0, ip60))
+ {
+ next0 = NAT64_IN2OUT_NEXT_DROP;
+ b0->error =
+ node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION];
+ }
+ goto trace0;
+ }
+
if (icmp6_to_icmp
(b0, nat64_in2out_icmp_set_cb, &ctx0,
nat64_in2out_inner_icmp_set_cb, &ctx0))
}
else
{
+ if (is_hairpinning (&ip60->dst_address))
+ {
+ next0 = NAT64_IN2OUT_NEXT_IP6_LOOKUP;
+ if (nat64_in2out_tcp_udp_hairpinning (vm, b0, ip60))
+ {
+ next0 = NAT64_IN2OUT_NEXT_DROP;
+ b0->error =
+ node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION];
+ }
+ goto trace0;
+ }
+
if (ip6_to_ip4_tcp_udp
(b0, nat64_in2out_tcp_udp_set_cb, &ctx0, 0))
{
/* edit / add dispositions here */
.next_nodes = {
[NAT64_IN2OUT_NEXT_DROP] = "error-drop",
- [NAT64_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+ [NAT64_IN2OUT_NEXT_IP4_LOOKUP] = "ip4-lookup",
+ [NAT64_IN2OUT_NEXT_IP6_LOOKUP] = "ip6-lookup",
},
};
/* *INDENT-ON* */
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00
- };
+};
/* *INDENT-ON* */
+
typedef struct
{
u32 sw_if_index;
ip46_address_t saddr, daddr;
ip6_address_t ip6_saddr;
udp_header_t *udp = ip4_next_header (ip4);
+ tcp_header_t *tcp = ip4_next_header (ip4);
snat_protocol_t proto = ip_proto_to_snat_proto (ip4->protocol);
u16 dport = udp->dst_port;
u16 sport = udp->src_port;
u32 sw_if_index, fib_index;
+ u16 *checksum;
+ ip_csum_t csum;
sw_if_index = vnet_buffer (ctx->b)->sw_if_index[VLIB_RX];
fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
ip6->dst_address.as_u64[1] = bibe->in_addr.as_u64[1];
udp->dst_port = bibe->in_port;
+ if (proto == SNAT_PROTOCOL_UDP)
+ checksum = &udp->checksum;
+ else
+ checksum = &tcp->checksum;
+ csum = ip_csum_sub_even (*checksum, dport);
+ csum = ip_csum_add_even (csum, udp->dst_port);
+ *checksum = ip_csum_fold (csum);
+
+ vnet_buffer (ctx->b)->sw_if_index[VLIB_TX] = bibe->fib_index;
+
return 0;
}
ip6->dst_address.as_u64[1] = bibe->in_addr.as_u64[1];
((u16 *) (icmp))[2] = bibe->in_port;
+ vnet_buffer (ctx->b)->sw_if_index[VLIB_TX] = bibe->fib_index;
}
else
{
ip6->src_address.as_u64[0] = bibe->in_addr.as_u64[0];
ip6->src_address.as_u64[1] = bibe->in_addr.as_u64[1];
((u16 *) (icmp))[2] = bibe->in_port;
+
+ vnet_buffer (ctx->b)->sw_if_index[VLIB_TX] = bibe->fib_index;
}
else
{
udp_header_t *udp = ip4_next_header (ip4);
+ tcp_header_t *tcp = ip4_next_header (ip4);
u16 dport = udp->dst_port;
u16 sport = udp->src_port;
+ u16 *checksum;
+ ip_csum_t csum;
ste =
nat64_db_st_entry_find (&nm->db, &saddr, &daddr, sport, dport, proto,
ip6->src_address.as_u64[0] = bibe->in_addr.as_u64[0];
ip6->src_address.as_u64[1] = bibe->in_addr.as_u64[1];
udp->src_port = bibe->in_port;
+
+ if (proto == SNAT_PROTOCOL_UDP)
+ checksum = &udp->checksum;
+ else
+ checksum = &tcp->checksum;
+ if (*checksum)
+ {
+ csum = ip_csum_sub_even (*checksum, sport);
+ csum = ip_csum_add_even (csum, udp->src_port);
+ *checksum = ip_csum_fold (csum);
+ }
+
+ vnet_buffer (ctx->b)->sw_if_index[VLIB_TX] = bibe->fib_index;
}
return 0;
{
u8 *s;
- s = format (0, "SCRIPT: nat64_add_del_pool_addr_range");
+ s = format (0, "SCRIPT: nat64_add_del_pool_addr_range ");
s = format (s, "%U - %U vrf_id %u %s\n",
format_ip4_address, mp->start_addr,
format_ip4_address, mp->end_addr,
clib_memcpy (rmp->address, &(a->addr), 4);
if (a->fib_index != ~0)
{
- fib_table_t *fib = fib_table_get (a->fib_index, FIB_PROTOCOL_IP4);
+ fib_table_t *fib = fib_table_get (a->fib_index, FIB_PROTOCOL_IP6);
if (!fib)
return -1;
rmp->vrf_id = ntohl (fib->ft_table_id);
//We have an ICMP inside an ICMP
//It needs to be translated, but not for error ICMP messages
icmp46_header_t *inner_icmp = (icmp46_header_t *) (inner_ip4 + 1);
- csum = inner_icmp->checksum;
//Only types ICMP4_echo_request and ICMP4_echo_reply are handled by icmp_to_icmp6_header
- csum = ip_csum_sub_even (csum, *((u16 *) inner_icmp));
inner_icmp->type = (inner_icmp->type == ICMP4_echo_request) ?
ICMP6_echo_request : ICMP6_echo_reply;
- csum = ip_csum_add_even (csum, *((u16 *) inner_icmp));
- csum =
- ip_csum_add_even (csum, clib_host_to_net_u16 (IP_PROTOCOL_ICMP6));
- csum =
- ip_csum_add_even (csum, inner_ip4->length - sizeof (*inner_ip4));
- inner_icmp->checksum = ip_csum_fold (csum);
inner_L4_checksum = &inner_icmp->checksum;
inner_ip4->protocol = IP_PROTOCOL_ICMP6;
}
os_panic ();
}
- csum = *inner_L4_checksum; //Initial checksum of the inner L4 header
-
inner_ip6->ip_version_traffic_class_and_flow_label =
clib_host_to_net_u32 ((6 << 28) + (inner_ip4->tos << 20));
inner_ip6->payload_length =
sizeof (*inner_frag));
}
- /* UDP checksum is optional */
- if (csum)
+ csum = *inner_L4_checksum;
+ if (inner_ip6->protocol == IP_PROTOCOL_ICMP6)
{
- csum = ip_csum_add_even (csum, inner_ip6->src_address.as_u64[0]);
- csum = ip_csum_add_even (csum, inner_ip6->src_address.as_u64[1]);
- csum = ip_csum_add_even (csum, inner_ip6->dst_address.as_u64[0]);
- csum = ip_csum_add_even (csum, inner_ip6->dst_address.as_u64[1]);
- *inner_L4_checksum = ip_csum_fold (csum);
+ //Recompute ICMP checksum
+ icmp46_header_t *inner_icmp = (icmp46_header_t *) (inner_ip4 + 1);
+
+ inner_icmp->checksum = 0;
+ csum = ip_csum_with_carry (0, inner_ip6->payload_length);
+ csum =
+ ip_csum_with_carry (csum,
+ clib_host_to_net_u16 (inner_ip6->protocol));
+ csum = ip_csum_with_carry (csum, inner_ip6->src_address.as_u64[0]);
+ csum = ip_csum_with_carry (csum, inner_ip6->src_address.as_u64[1]);
+ csum = ip_csum_with_carry (csum, inner_ip6->dst_address.as_u64[0]);
+ csum = ip_csum_with_carry (csum, inner_ip6->dst_address.as_u64[1]);
+ csum =
+ ip_incremental_checksum (csum, inner_icmp,
+ clib_net_to_host_u16
+ (inner_ip6->payload_length));
+ inner_icmp->checksum = ~ip_csum_fold (csum);
+ }
+ else
+ {
+ /* UDP checksum is optional */
+ if (csum)
+ {
+ csum =
+ ip_csum_add_even (csum, inner_ip6->src_address.as_u64[0]);
+ csum =
+ ip_csum_add_even (csum, inner_ip6->src_address.as_u64[1]);
+ csum =
+ ip_csum_add_even (csum, inner_ip6->dst_address.as_u64[0]);
+ csum =
+ ip_csum_add_even (csum, inner_ip6->dst_address.as_u64[1]);
+ *inner_L4_checksum = ip_csum_fold (csum);
+ }
}
}
else
csum = ip_csum_sub_even (*checksum, ip4->src_address.as_u32);
csum = ip_csum_sub_even (csum, ip4->dst_address.as_u32);
+ *checksum = ip_csum_fold (csum);
// Deal with fragmented packets
if (PREDICT_FALSE (ip4->flags_and_fragment_offset &
if ((rv = fn (ip4, ip6, ctx)) != 0)
return rv;
- csum = ip_csum_add_even (csum, ip6->src_address.as_u64[0]);
+ csum = ip_csum_add_even (*checksum, ip6->src_address.as_u64[0]);
csum = ip_csum_add_even (csum, ip6->src_address.as_u64[1]);
csum = ip_csum_add_even (csum, ip6->dst_address.as_u64[0]);
csum = ip_csum_add_even (csum, ip6->dst_address.as_u64[1]);
else if (inner_protocol == IP_PROTOCOL_ICMP6)
{
icmp46_header_t *inner_icmp = (icmp46_header_t *) inner_l4;
- csum = inner_icmp->checksum;
- csum = ip_csum_sub_even (csum, *((u16 *) inner_icmp));
//It cannot be of a different type as ip6_icmp_to_icmp6_in_place succeeded
inner_icmp->type = (inner_icmp->type == ICMP6_echo_request) ?
ICMP4_echo_request : ICMP4_echo_reply;
- csum = ip_csum_add_even (csum, *((u16 *) inner_icmp));
- inner_icmp->checksum = ip_csum_fold (csum);
inner_protocol = IP_PROTOCOL_ICMP; //Will be copied to ip6 later
inner_L4_checksum = &inner_icmp->checksum;
}
csum = ip_csum_sub_even (csum, inner_ip6->src_address.as_u64[1]);
csum = ip_csum_sub_even (csum, inner_ip6->dst_address.as_u64[0]);
csum = ip_csum_sub_even (csum, inner_ip6->dst_address.as_u64[1]);
+ *inner_L4_checksum = ip_csum_fold (csum);
if ((rv = inner_fn (inner_ip6, inner_ip4, inner_ctx)) != 0)
return rv;
if (inner_ip4->protocol == IP_PROTOCOL_ICMP)
{
- //Remove remainings of the pseudo-header in the csum
- csum =
- ip_csum_sub_even (csum, clib_host_to_net_u16 (IP_PROTOCOL_ICMP6));
+ //Recompute ICMP checksum
+ icmp46_header_t *inner_icmp = (icmp46_header_t *) inner_l4;
+ inner_icmp->checksum = 0;
csum =
- ip_csum_sub_even (csum, inner_ip4->length - sizeof (*inner_ip4));
+ ip_incremental_checksum (0, inner_icmp,
+ clib_net_to_host_u16 (inner_ip4->length)
+ - sizeof (*inner_ip4));
+ inner_icmp->checksum = ~ip_csum_fold (csum);
}
else
{
//Update to new pseudo-header
+ csum = *inner_L4_checksum;
csum = ip_csum_add_even (csum, inner_ip4->src_address.as_u32);
csum = ip_csum_add_even (csum, inner_ip4->dst_address.as_u32);
+ *inner_L4_checksum = ip_csum_fold (csum);
}
- *inner_L4_checksum = ip_csum_fold (csum);
//Move up icmp header
ip4 = (ip4_header_t *) u8_ptr_add (inner_l4, -2 * sizeof (*ip4) - 8);
csum = ip_csum_sub_even (csum, ip6->src_address.as_u64[1]);
csum = ip_csum_sub_even (csum, ip6->dst_address.as_u64[0]);
csum = ip_csum_sub_even (csum, ip6->dst_address.as_u64[1]);
+ *checksum = ip_csum_fold (csum);
no_csum:
ip4 = (ip4_header_t *) u8_ptr_add (ip6, l4_offset - sizeof (*ip4));
}
else
{
- csum = ip_csum_add_even (csum, ip4->dst_address.as_u32);
+ csum = ip_csum_add_even (*checksum, ip4->dst_address.as_u32);
csum = ip_csum_add_even (csum, ip4->src_address.as_u32);
*checksum = ip_csum_fold (csum);
}
def tearDown(self):
super(MethodHolder, self).tearDown()
+ def check_ip_checksum(self, pkt):
+ """
+ Check IP checksum of the packet
+
+ :param pkt: Packet to check IP checksum
+ """
+ new = pkt.__class__(str(pkt))
+ del new['IP'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['IP'].chksum, pkt['IP'].chksum)
+
def check_tcp_checksum(self, pkt):
"""
Check TCP checksum in IP packet
new = new.__class__(str(new))
self.assertEqual(new['TCP'].chksum, pkt['TCP'].chksum)
+ def check_udp_checksum(self, pkt):
+ """
+ Check UDP checksum in IP packet
+
+ :param pkt: Packet to check UDP checksum
+ """
+ new = pkt.__class__(str(pkt))
+ del new['UDP'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['UDP'].chksum, pkt['UDP'].chksum)
+
+ def check_icmp_errror_embedded(self, pkt):
+ """
+ Check ICMP error embeded packet checksum
+
+ :param pkt: Packet to check ICMP error embeded packet checksum
+ """
+ if pkt.haslayer(IPerror):
+ new = pkt.__class__(str(pkt))
+ del new['IPerror'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['IPerror'].chksum, pkt['IPerror'].chksum)
+
+ if pkt.haslayer(TCPerror):
+ new = pkt.__class__(str(pkt))
+ del new['TCPerror'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['TCPerror'].chksum, pkt['TCPerror'].chksum)
+
+ if pkt.haslayer(UDPerror):
+ if pkt['UDPerror'].chksum != 0:
+ new = pkt.__class__(str(pkt))
+ del new['UDPerror'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['UDPerror'].chksum,
+ pkt['UDPerror'].chksum)
+
+ if pkt.haslayer(ICMPerror):
+ del new['ICMPerror'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['ICMPerror'].chksum, pkt['ICMPerror'].chksum)
+
+ def check_icmp_checksum(self, pkt):
+ """
+ Check ICMP checksum in IPv4 packet
+
+ :param pkt: Packet to check ICMP checksum
+ """
+ new = pkt.__class__(str(pkt))
+ del new['ICMP'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['ICMP'].chksum, pkt['ICMP'].chksum)
+ if pkt.haslayer(IPerror):
+ self.check_icmp_errror_embedded(pkt)
+
+ def check_icmpv6_checksum(self, pkt):
+ """
+ Check ICMPv6 checksum in IPv4 packet
+
+ :param pkt: Packet to check ICMPv6 checksum
+ """
+ new = pkt.__class__(str(pkt))
+ if pkt.haslayer(ICMPv6DestUnreach):
+ del new['ICMPv6DestUnreach'].cksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['ICMPv6DestUnreach'].cksum,
+ pkt['ICMPv6DestUnreach'].cksum)
+ self.check_icmp_errror_embedded(pkt)
+ if pkt.haslayer(ICMPv6EchoRequest):
+ del new['ICMPv6EchoRequest'].cksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['ICMPv6EchoRequest'].cksum,
+ pkt['ICMPv6EchoRequest'].cksum)
+ if pkt.haslayer(ICMPv6EchoReply):
+ del new['ICMPv6EchoReply'].cksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['ICMPv6EchoReply'].cksum,
+ pkt['ICMPv6EchoReply'].cksum)
+
def create_stream_in(self, in_if, out_if, ttl=64):
"""
Create packet stream for inside network
self.assertEqual(packet_num, len(capture))
for packet in capture:
try:
+ self.check_ip_checksum(packet)
self.assertEqual(packet[IP].src, nat_ip)
if dst_ip is not None:
self.assertEqual(packet[IP].dst, dst_ip)
self.assertNotEqual(
packet[TCP].sport, self.tcp_port_in)
self.tcp_port_out = packet[TCP].sport
+ self.check_tcp_checksum(packet)
elif packet.haslayer(UDP):
if same_port:
self.assertEqual(packet[UDP].sport, self.udp_port_in)
else:
self.assertNotEqual(packet[ICMP].id, self.icmp_id_in)
self.icmp_id_out = packet[ICMP].id
+ self.check_icmp_checksum(packet)
except:
self.logger.error(ppp("Unexpected or invalid packet "
"(outside network):", packet))
self.assertEqual(packet_num, len(capture))
for packet in capture:
try:
+ self.check_ip_checksum(packet)
self.assertEqual(packet[IP].dst, in_if.remote_ip4)
if packet.haslayer(TCP):
self.assertEqual(packet[TCP].dport, self.tcp_port_in)
+ self.check_tcp_checksum(packet)
elif packet.haslayer(UDP):
self.assertEqual(packet[UDP].dport, self.udp_port_in)
else:
self.assertEqual(packet[ICMP].id, self.icmp_id_in)
+ self.check_icmp_checksum(packet)
except:
self.logger.error(ppp("Unexpected or invalid packet "
"(inside network):", packet))
self.assertEqual(packet[IPv6].dst, dst_ip)
if packet.haslayer(TCP):
self.assertEqual(packet[TCP].dport, self.tcp_port_in)
+ self.check_tcp_checksum(packet)
elif packet.haslayer(UDP):
self.assertEqual(packet[UDP].dport, self.udp_port_in)
+ self.check_udp_checksum(packet)
else:
self.assertEqual(packet[ICMPv6EchoReply].id,
self.icmp_id_in)
+ self.check_icmpv6_checksum(packet)
except:
self.logger.error(ppp("Unexpected or invalid packet "
"(inside network):", packet))
cls.icmp_id_out = 6305
cls.nat_addr = '10.0.0.3'
cls.nat_addr_n = socket.inet_pton(socket.AF_INET, cls.nat_addr)
+ cls.vrf1_id = 10
+ cls.vrf1_nat_addr = '10.0.10.3'
+ cls.vrf1_nat_addr_n = socket.inet_pton(socket.AF_INET,
+ cls.vrf1_nat_addr)
- cls.create_pg_interfaces(range(2))
+ cls.create_pg_interfaces(range(3))
cls.ip6_interfaces = list(cls.pg_interfaces[0:1])
+ cls.ip6_interfaces.append(cls.pg_interfaces[2])
cls.ip4_interfaces = list(cls.pg_interfaces[1:2])
+ cls.pg_interfaces[2].set_table_ip6(cls.vrf1_id)
+
+ cls.pg0.generate_remote_hosts(2)
+
for i in cls.ip6_interfaces:
i.admin_up()
i.config_ip6()
- i.resolve_ndp()
+ i.configure_ipv6_neighbors()
for i in cls.ip4_interfaces:
i.admin_up()
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture(3)
- self.verify_capture_out(capture, packet_num=3, nat_ip=self.nat_addr,
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=self.nat_addr,
dst_ip=self.pg1.remote_ip4)
# out2in
self.pg1.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg0.get_capture(3)
+ capture = self.pg0.get_capture(len(pkts))
ip = IPv6(src=''.join(['64:ff9b::', self.pg1.remote_ip4]))
self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg0.remote_ip6)
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture(3)
- self.verify_capture_out(capture, packet_num=3, nat_ip=self.nat_addr,
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=self.nat_addr,
dst_ip=self.pg1.remote_ip4)
# out2in
self.pg1.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg0.get_capture(3)
- ip = IPv6(src=''.join(['64:ff9b::', self.pg1.remote_ip4]))
+ capture = self.pg0.get_capture(len(pkts))
self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg0.remote_ip6)
ses_num_end = self.nat64_get_ses_num()
self.assertEqual(ses_num_end - ses_num_start, 3)
+ # tenant with specific VRF
+ self.vapi.nat64_add_del_pool_addr_range(self.vrf1_nat_addr_n,
+ self.vrf1_nat_addr_n,
+ vrf_id=self.vrf1_id)
+ self.vapi.nat64_add_del_interface(self.pg2.sw_if_index)
+
+ pkts = self.create_stream_in_ip6(self.pg2, self.pg1)
+ self.pg2.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=self.vrf1_nat_addr,
+ dst_ip=self.pg1.remote_ip4)
+
+ pkts = self.create_stream_out(self.pg1, dst_ip=self.vrf1_nat_addr)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg2.get_capture(len(pkts))
+ self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg2.remote_ip6)
+
def test_static(self):
""" NAT64 static translation test """
self.tcp_port_in = 60303
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture(3)
- self.verify_capture_out(capture, packet_num=3, nat_ip=self.nat_addr,
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=self.nat_addr,
dst_ip=self.pg1.remote_ip4, same_port=True)
# out2in
self.pg1.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg0.get_capture(3)
+ capture = self.pg0.get_capture(len(pkts))
ip = IPv6(src=''.join(['64:ff9b::', self.pg1.remote_ip4]))
self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg0.remote_ip6)
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture(3)
+ capture = self.pg1.get_capture(len(pkts))
ses_num_before_timeout = self.nat64_get_ses_num()
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture_ip4 = self.pg1.get_capture(len(pkts))
- self.verify_capture_out(capture_ip4, packet_num=3,
+ self.verify_capture_out(capture_ip4,
nat_ip=self.nat_addr,
dst_ip=self.pg1.remote_ip4)
inner = packet[IPerror]
self.assertEqual(inner.src, self.pg1.remote_ip4)
self.assertEqual(inner.dst, self.nat_addr)
+ self.check_icmp_checksum(packet)
if inner.haslayer(TCPerror):
self.assertEqual(inner[TCPerror].dport, self.tcp_port_out)
elif inner.haslayer(UDPerror):
inner = icmp[IPerror6]
self.assertEqual(inner.src, self.pg0.remote_ip6)
self.assertEqual(inner.dst, ip.src)
+ self.check_icmpv6_checksum(packet)
if inner.haslayer(TCPerror):
self.assertEqual(inner[TCPerror].sport, self.tcp_port_in)
elif inner.haslayer(UDPerror):
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
+ def test_hairpinning(self):
+ """ NAT64 hairpinning """
+
+ client = self.pg0.remote_hosts[0]
+ server = self.pg0.remote_hosts[1]
+ server_tcp_in_port = 22
+ server_tcp_out_port = 4022
+ server_udp_in_port = 23
+ server_udp_out_port = 4023
+ client_tcp_in_port = 1234
+ client_udp_in_port = 1235
+ client_tcp_out_port = 0
+ client_udp_out_port = 0
+ ip = IPv6(src=''.join(['64:ff9b::', self.nat_addr]))
+ nat_addr_ip6 = ip.src
+
+ self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n,
+ self.nat_addr_n)
+ self.vapi.nat64_add_del_interface(self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0)
+
+ self.vapi.nat64_add_del_static_bib(server.ip6n,
+ self.nat_addr_n,
+ server_tcp_in_port,
+ server_tcp_out_port,
+ IP_PROTOS.tcp)
+ self.vapi.nat64_add_del_static_bib(server.ip6n,
+ self.nat_addr_n,
+ server_udp_in_port,
+ server_udp_out_port,
+ IP_PROTOS.udp)
+
+ # client to server
+ pkts = []
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=client.ip6, dst=nat_addr_ip6) /
+ TCP(sport=client_tcp_in_port, dport=server_tcp_out_port))
+ pkts.append(p)
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=client.ip6, dst=nat_addr_ip6) /
+ UDP(sport=client_udp_in_port, dport=server_udp_out_port))
+ pkts.append(p)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IPv6].src, nat_addr_ip6)
+ self.assertEqual(packet[IPv6].dst, server.ip6)
+ if packet.haslayer(TCP):
+ self.assertNotEqual(packet[TCP].sport, client_tcp_in_port)
+ self.assertEqual(packet[TCP].dport, server_tcp_in_port)
+ self.check_tcp_checksum(packet)
+ client_tcp_out_port = packet[TCP].sport
+ else:
+ self.assertNotEqual(packet[UDP].sport, client_udp_in_port)
+ self.assertEqual(packet[UDP].dport, server_udp_in_port)
+ self.check_udp_checksum(packet)
+ client_udp_out_port = packet[UDP].sport
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # server to client
+ pkts = []
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=server.ip6, dst=nat_addr_ip6) /
+ TCP(sport=server_tcp_in_port, dport=client_tcp_out_port))
+ pkts.append(p)
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=server.ip6, dst=nat_addr_ip6) /
+ UDP(sport=server_udp_in_port, dport=client_udp_out_port))
+ pkts.append(p)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IPv6].src, nat_addr_ip6)
+ self.assertEqual(packet[IPv6].dst, client.ip6)
+ if packet.haslayer(TCP):
+ self.assertEqual(packet[TCP].sport, server_tcp_out_port)
+ self.assertEqual(packet[TCP].dport, client_tcp_in_port)
+ self.check_tcp_checksum(packet)
+ else:
+ self.assertEqual(packet[UDP].sport, server_udp_out_port)
+ self.assertEqual(packet[UDP].dport, client_udp_in_port)
+ self.check_udp_checksum(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # ICMP error
+ pkts = []
+ pkts = [Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=client.ip6, dst=nat_addr_ip6) /
+ ICMPv6DestUnreach(code=1) /
+ packet[IPv6] for packet in capture]
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IPv6].src, nat_addr_ip6)
+ self.assertEqual(packet[IPv6].dst, server.ip6)
+ icmp = packet[ICMPv6DestUnreach]
+ self.assertEqual(icmp.code, 1)
+ inner = icmp[IPerror6]
+ self.assertEqual(inner.src, server.ip6)
+ self.assertEqual(inner.dst, nat_addr_ip6)
+ self.check_icmpv6_checksum(packet)
+ if inner.haslayer(TCPerror):
+ self.assertEqual(inner[TCPerror].sport, server_tcp_in_port)
+ self.assertEqual(inner[TCPerror].dport,
+ client_tcp_out_port)
+ else:
+ self.assertEqual(inner[UDPerror].sport, server_udp_in_port)
+ self.assertEqual(inner[UDPerror].dport,
+ client_udp_out_port)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
def nat64_get_ses_num(self):
"""
Return number of active NAT64 sessions.
for addr in adresses:
self.vapi.nat64_add_del_pool_addr_range(addr.address,
addr.address,
+ vrf_id=addr.vrf_id,
is_add=0)
def tearDown(self):
Code Review / vpp.git / commitdiff