*/
#include <vlib/vlib.h>
-#include <vnet/pg/pg.h>
#include <gtpu/gtpu.h>
-vlib_node_registration_t gtpu4_input_node;
-vlib_node_registration_t gtpu6_input_node;
+extern vlib_node_registration_t gtpu4_input_node;
+extern vlib_node_registration_t gtpu6_input_node;
typedef struct {
u32 next_index;
u32 tunnel_index;
u32 error;
u32 teid;
+ gtpu_header_t header;
+ u8 forwarding_type;
} gtpu_rx_trace_t;
static u8 * format_gtpu_rx_trace (u8 * s, va_list * args)
if (t->tunnel_index != ~0)
{
- s = format (s, "GTPU decap from gtpu_tunnel%d teid %d next %d error %d",
- t->tunnel_index, t->teid, t->next_index, t->error);
+ s = format (s, "GTPU decap from gtpu_tunnel%d ", t->tunnel_index);
+ switch (t->forwarding_type)
+ {
+ case GTPU_FORWARD_BAD_HEADER:
+ s = format (s, "forwarding bad-header ");
+ break;
+ case GTPU_FORWARD_UNKNOWN_TEID:
+ s = format (s, "forwarding unknown-teid ");
+ break;
+ case GTPU_FORWARD_UNKNOWN_TYPE:
+ s = format (s, "forwarding unknown-type ");
+ break;
+ }
+ s = format (s, "teid %u, ", t->teid);
}
else
{
- s = format (s, "GTPU decap error - tunnel for teid %d does not exist",
+ s = format (s, "GTPU decap error - tunnel for teid %u does not exist, ",
t->teid);
}
+ s = format (s, "next %d error %d, ", t->next_index, t->error);
+ s = format (s, "flags: 0x%x, type: %d, length: %d", t->header.ver_flags,
+ t->header.type, t->header.length);
return s;
}
always_inline u32
validate_gtpu_fib (vlib_buffer_t *b, gtpu_tunnel_t *t, u32 is_ip4)
{
- u32 fib_index, sw_if_index;
-
- sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
-
- if (is_ip4)
- fib_index = (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
- vec_elt (ip4_main.fib_index_by_sw_if_index, sw_if_index) :
- vnet_buffer (b)->sw_if_index[VLIB_TX];
- else
- fib_index = (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
- vec_elt (ip6_main.fib_index_by_sw_if_index, sw_if_index) :
- vnet_buffer (b)->sw_if_index[VLIB_TX];
-
- return (fib_index == t->encap_fib_index);
+ return t->encap_fib_index == vlib_buffer_get_ip_fib_index (b, is_ip4);
}
+// Gets run with every input
always_inline uword
gtpu_input (vlib_main_t * vm,
vlib_node_runtime_t * node,
else
clib_memset (&last_key6, 0xff, sizeof (last_key6));
+ // Where is the framevector coming from
from = vlib_frame_vector_args (from_frame);
+ // number of packets left in frame
n_left_from = from_frame->n_vectors;
+ // whats the next node it needs to go to
next_index = node->cached_next_index;
+ // stats from the next interface
stats_sw_if_index = node->runtime_data[0];
+ // number of packets processed
stats_n_packets = stats_n_bytes = 0;
+ // run until no more packets left in vectorframe
while (n_left_from > 0)
{
u32 n_left_to_next;
+ // get vectorframe to process
vlib_get_next_frame (vm, node, next_index,
to_next, n_left_to_next);
+ // while there are still more than 4 packets left in frame and more than
+ // two packets in current frame
while (n_left_from >= 4 && n_left_to_next >= 2)
{
- u32 bi0, bi1;
+ // buffer index for loading packet data
+ u32 bi0, bi1;
+ // vlib packet buffer
vlib_buffer_t * b0, * b1;
+ // next operation to do with the packet
u32 next0, next1;
- ip4_header_t * ip4_0, * ip4_1;
- ip6_header_t * ip6_0, * ip6_1;
- gtpu_header_t * gtpu0, * gtpu1;
- u32 gtpu_hdr_len0 = 0, gtpu_hdr_len1 =0 ;
+ // IP4 header type
+ ip4_header_t *ip4_0, *ip4_1;
+ ip6_header_t *ip6_0, *ip6_1;
+ gtpu_header_t *gtpu0, *gtpu1;
+ i32 gtpu_hdr_len0, gtpu_hdr_len1;
uword * p0, * p1;
u32 tunnel_index0, tunnel_index1;
gtpu_tunnel_t * t0, * t1, * mt0 = NULL, * mt1 = NULL;
gtpu6_tunnel_key_t key6_0, key6_1;
u32 error0, error1;
u32 sw_if_index0, sw_if_index1, len0, len1;
+ u8 has_space0, has_space1;
+ u8 ver0, ver1;
+ udp_header_t *udp0, *udp1;
+ ip_csum_t sum0, sum1;
+ u32 old0, old1;
+ gtpu_ext_header_t ext = { .type = 0, .len = 0, .pad = 0 };
+ gtpu_ext_header_t *ext0, *ext1;
+ bool is_fast_track0, is_fast_track1;
+ ext0 = ext1 = &ext;
/* Prefetch next iteration. */
{
vlib_buffer_t * p2, * p3;
+ // prefetch 3 and 4
p2 = vlib_get_buffer (vm, from[2]);
p3 = vlib_get_buffer (vm, from[3]);
CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
}
+ // getting buffer index from vectorframe
bi0 = from[0];
bi1 = from[1];
+ // pre inserting the packets for the next node
to_next[0] = bi0;
to_next[1] = bi1;
+ // forward in vectorframe
from += 2;
+ // forward next node
to_next += 2;
+ // decimate message counter for next node
n_left_to_next -= 2;
+ // decimate message counter for current progessing node
n_left_from -= 2;
+ // load packets into buffer
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
/* udp leaves current_data pointing at the gtpu header */
- gtpu0 = vlib_buffer_get_current (b0);
- gtpu1 = vlib_buffer_get_current (b1);
- if (is_ip4) {
- vlib_buffer_advance
- (b0, -(word)(sizeof(udp_header_t)+sizeof(ip4_header_t)));
- vlib_buffer_advance
- (b1, -(word)(sizeof(udp_header_t)+sizeof(ip4_header_t)));
- ip4_0 = vlib_buffer_get_current (b0);
- ip4_1 = vlib_buffer_get_current (b1);
- } else {
- vlib_buffer_advance
- (b0, -(word)(sizeof(udp_header_t)+sizeof(ip6_header_t)));
- vlib_buffer_advance
- (b1, -(word)(sizeof(udp_header_t)+sizeof(ip6_header_t)));
- ip6_0 = vlib_buffer_get_current (b0);
- ip6_1 = vlib_buffer_get_current (b1);
- }
+ // get pointers to the beginnings of the gtpu frame
+ gtpu0 = vlib_buffer_get_current (b0);
+ gtpu1 = vlib_buffer_get_current (b1);
+ if (is_ip4)
+ {
+ ip4_0 = (void *) ((u8 *) gtpu0 - sizeof (udp_header_t) -
+ sizeof (ip4_header_t));
+ ip4_1 = (void *) ((u8 *) gtpu1 - sizeof (udp_header_t) -
+ sizeof (ip4_header_t));
+ }
+ else
+ {
+ ip6_0 = (void *) ((u8 *) gtpu0 - sizeof (udp_header_t) -
+ sizeof (ip6_header_t));
+ ip6_1 = (void *) ((u8 *) gtpu1 - sizeof (udp_header_t) -
+ sizeof (ip6_header_t));
+ }
+ udp0 = (void *) ((u8 *) gtpu0 - sizeof (udp_header_t));
+ udp1 = (void *) ((u8 *) gtpu1 - sizeof (udp_header_t));
+
+ tunnel_index0 = ~0;
+ error0 = 0;
+
+ tunnel_index1 = ~0;
+ error1 = 0;
+
+ /* speculatively load gtp header version field */
+ ver0 = gtpu0->ver_flags;
+ ver1 = gtpu1->ver_flags;
+
+ /*
+ * Manipulate gtpu header
+ * TBD: Manipulate Sequence Number and N-PDU Number
+ * TBD: Manipulate Next Extension Header
+ */
+
+ /* Perform all test assuming the packet has the needed space.
+ * Check if version 1, not PT, not reserved.
+ * Check message type 255.
+ */
+ is_fast_track0 =
+ ((ver0 & (GTPU_VER_MASK | GTPU_PT_BIT | GTPU_RES_BIT)) ==
+ (GTPU_V1_VER | GTPU_PT_BIT));
+ is_fast_track0 = is_fast_track0 & (gtpu0->type == 255);
+
+ is_fast_track1 =
+ ((ver1 & (GTPU_VER_MASK | GTPU_PT_BIT | GTPU_RES_BIT)) ==
+ (GTPU_V1_VER | GTPU_PT_BIT));
+ is_fast_track1 = is_fast_track1 & (gtpu1->type == 255);
+
+ /* Make the header overlap the end of the gtpu_header_t, so
+ * that it starts with the same Next extension header as the
+ * gtpu_header_t.
+ * This means that the gtpu_ext_header_t (ext) has the type
+ * from the previous header and the length from the current one.
+ * Works both for the first gtpu_header_t and all following
+ * gtpu_ext_header_t extensions.
+ * Copy the ext data if the E bit is set, else use the 0 value.
+ */
+ ext0 = (ver0 & GTPU_E_BIT) ?
+ (gtpu_ext_header_t *) >pu0->next_ext_type :
+ &ext;
+ ext1 = (ver1 & GTPU_E_BIT) ?
+ (gtpu_ext_header_t *) >pu1->next_ext_type :
+ &ext;
+
+ /* One or more of the E, S and PN flags are set, so all 3 fields
+ * must be present:
+ * The gtpu_header_t contains the Sequence number, N-PDU number and
+ * Next extension header type.
+ * If E is not set subtract 4 bytes from the header.
+ * Then add the length of the extension. 0 * 4 if E is not set,
+ * else it's the ext->len from the gtp extension. Length is multiple
+ * of 4 always.
+ * Note: This length is only valid if the header itself is valid,
+ * so it must be verified before use.
+ */
+ gtpu_hdr_len0 = sizeof (gtpu_header_t) -
+ (((ver0 & GTPU_E_S_PN_BIT) == 0) * 4) +
+ ext0->len * 4;
+ gtpu_hdr_len1 = sizeof (gtpu_header_t) -
+ (((ver1 & GTPU_E_S_PN_BIT) == 0) * 4) +
+ ext1->len * 4;
+
+ /* Get the next extension, unconditionally.
+ * If E was not set in the gtp header ext->len is zero.
+ * If E was set ext0 will now point to the packet buffer.
+ * If the gtp packet is illegal this might point outside the buffer.
+ * TBD check the updated for ext0->type != 0, and continue removing
+ * extensions. Only for clarity, will be optimized away.
+ */
+ ext0 += ext0->len * 4 / sizeof (*ext0);
+ ext1 += ext1->len * 4 / sizeof (*ext1);
+
+ /* Check the space, if this is true then ext0 points to a valid
+ * location in the buffer as well.
+ */
+ has_space0 = vlib_buffer_has_space (b0, gtpu_hdr_len0);
+ has_space1 = vlib_buffer_has_space (b1, gtpu_hdr_len1);
+
+ /* Diverge the packet paths for 0 and 1 */
+ if (PREDICT_FALSE ((!is_fast_track0) | (!has_space0)))
+ {
+ /* Not fast path. ext0 and gtpu_hdr_len0 might be wrong */
+
+ /* GCC will hopefully fix the duplicate compute */
+ if (PREDICT_FALSE (
+ !((ver0 & (GTPU_VER_MASK | GTPU_PT_BIT | GTPU_RES_BIT)) ==
+ (GTPU_V1_VER | GTPU_PT_BIT)) |
+ (!has_space0)))
+ {
+ /* The header or size is wrong */
+ error0 =
+ has_space0 ? GTPU_ERROR_BAD_VER : GTPU_ERROR_TOO_SMALL;
+ next0 = GTPU_INPUT_NEXT_DROP;
+
+ /* This is an unsupported/bad packet.
+ * Check if it is to be forwarded.
+ */
+ if (is_ip4)
+ tunnel_index0 = gtm->bad_header_forward_tunnel_index_ipv4;
+ else
+ tunnel_index0 = gtm->bad_header_forward_tunnel_index_ipv6;
- /* pop (ip, udp, gtpu) */
- if (is_ip4) {
- vlib_buffer_advance
- (b0, sizeof(*ip4_0)+sizeof(udp_header_t));
- vlib_buffer_advance
- (b1, sizeof(*ip4_1)+sizeof(udp_header_t));
- } else {
- vlib_buffer_advance
- (b0, sizeof(*ip6_0)+sizeof(udp_header_t));
- vlib_buffer_advance
- (b1, sizeof(*ip6_1)+sizeof(udp_header_t));
- }
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward0;
- tunnel_index0 = ~0;
- error0 = 0;
+ goto trace0;
+ }
+ /* Correct version and has the space. It can only be unknown
+ * message type.
+ */
+ error0 = GTPU_ERROR_UNSUPPORTED_TYPE;
+ next0 = GTPU_INPUT_NEXT_DROP;
- tunnel_index1 = ~0;
- error1 = 0;
+ /* This is an error/nonstandard packet
+ * Check if it is to be forwarded. */
+ if (is_ip4)
+ tunnel_index0 = gtm->unknown_type_forward_tunnel_index_ipv4;
+ else
+ tunnel_index0 = gtm->unknown_type_forward_tunnel_index_ipv6;
- if (PREDICT_FALSE ((gtpu0->ver_flags & GTPU_VER_MASK) != GTPU_V1_VER))
- {
- error0 = GTPU_ERROR_BAD_VER;
- next0 = GTPU_INPUT_NEXT_DROP;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward0;
+
+ /* The packet is ipv6/not forwarded */
goto trace0;
}
key4_0.src = ip4_0->src_address.as_u32;
key4_0.teid = gtpu0->teid;
- /* Make sure GTPU tunnel exist according to packet SIP and teid
- * SIP identify a GTPU path, and teid identify a tunnel in a given GTPU path */
- if (PREDICT_FALSE (key4_0.as_u64 != last_key4.as_u64))
- {
- p0 = hash_get (gtm->gtpu4_tunnel_by_key, key4_0.as_u64);
- if (PREDICT_FALSE (p0 == NULL))
- {
- error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
- next0 = GTPU_INPUT_NEXT_DROP;
- goto trace0;
- }
- last_key4.as_u64 = key4_0.as_u64;
- tunnel_index0 = last_tunnel_index = p0[0];
- }
- else
- tunnel_index0 = last_tunnel_index;
+ /* Make sure GTPU tunnel exist according to packet SourceIP and
+ * teid SourceIP identify a GTPU path, and teid identify a tunnel
+ * in a given GTPU path */
+ if (PREDICT_FALSE (key4_0.as_u64 != last_key4.as_u64))
+ {
+ p0 = hash_get (gtm->gtpu4_tunnel_by_key, key4_0.as_u64);
+ if (PREDICT_FALSE (p0 == NULL))
+ {
+ error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
+ next0 = GTPU_INPUT_NEXT_DROP;
+ /* This is a standard packet, but no tunnel was found.
+ * Check if it is to be forwarded. */
+ tunnel_index0 =
+ gtm->unknown_teid_forward_tunnel_index_ipv4;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward0;
+ goto trace0;
+ }
+ last_key4.as_u64 = key4_0.as_u64;
+ tunnel_index0 = last_tunnel_index = p0[0];
+ }
+ else // when the address of the packet is the same as the packet
+ // before ... saving lookup in table
+ tunnel_index0 = last_tunnel_index;
+ // tunnel index in vpp
t0 = pool_elt_at_index (gtm->tunnels, tunnel_index0);
/* Validate GTPU tunnel encap-fib index against packet */
{
error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
next0 = GTPU_INPUT_NEXT_DROP;
+ tunnel_index0 = gtm->unknown_teid_forward_tunnel_index_ipv4;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward0;
goto trace0;
}
- /* Validate GTPU tunnel SIP against packet DIP */
+ /* Validate GTPU tunnel SourceIP against packet DestinationIP */
if (PREDICT_TRUE (ip4_0->dst_address.as_u32 == t0->src.ip4.as_u32))
goto next0; /* valid packet */
if (PREDICT_FALSE (ip4_address_is_multicast (&ip4_0->dst_address)))
}
error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
next0 = GTPU_INPUT_NEXT_DROP;
+ tunnel_index0 = gtm->unknown_teid_forward_tunnel_index_ipv4;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward0;
goto trace0;
} else /* !is_ip4 */ {
{
error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
next0 = GTPU_INPUT_NEXT_DROP;
- goto trace0;
- }
- clib_memcpy (&last_key6, &key6_0, sizeof(key6_0));
- tunnel_index0 = last_tunnel_index = p0[0];
- }
- else
- tunnel_index0 = last_tunnel_index;
+ /* This is a standard packet, but no tunnel was found.
+ * Check if it is to be forwarded. */
+ tunnel_index0 =
+ gtm->unknown_teid_forward_tunnel_index_ipv6;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward0;
+ goto trace0;
+ }
+ clib_memcpy_fast (&last_key6, &key6_0, sizeof (key6_0));
+ tunnel_index0 = last_tunnel_index = p0[0];
+ }
+ else
+ tunnel_index0 = last_tunnel_index;
t0 = pool_elt_at_index (gtm->tunnels, tunnel_index0);
/* Validate GTPU tunnel encap-fib index against packet */
{
error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
next0 = GTPU_INPUT_NEXT_DROP;
+ tunnel_index0 = gtm->unknown_teid_forward_tunnel_index_ipv6;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward0;
goto trace0;
}
}
error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
next0 = GTPU_INPUT_NEXT_DROP;
+ tunnel_index0 = gtm->unknown_teid_forward_tunnel_index_ipv6;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward0;
goto trace0;
}
+ forward0:
+ /* Get the tunnel */
+ t0 = pool_elt_at_index (gtm->tunnels, tunnel_index0);
- next0:
- /* Manipulate gtpu header */
- if (PREDICT_FALSE((gtpu0->ver_flags & GTPU_E_S_PN_BIT) != 0))
+ /* Validate GTPU tunnel encap-fib index against packet */
+ if (PREDICT_FALSE (validate_gtpu_fib (b0, t0, is_ip4) == 0))
{
- gtpu_hdr_len0 = sizeof(gtpu_header_t);
+ error0 = GTPU_ERROR_NO_ERROR_TUNNEL;
+ next0 = GTPU_INPUT_NEXT_DROP;
+ goto trace0;
+ }
- /* Manipulate Sequence Number and N-PDU Number */
- /* TBD */
+ /* Clear the error, next0 will be overwritten by the tunnel */
+ error0 = 0;
- /* Manipulate Next Extension Header */
- /* TBD */
+ if (is_ip4)
+ {
+ /* Forward packet instead. Push the IP+UDP header */
+ gtpu_hdr_len0 =
+ -(i32) (sizeof (udp_header_t) + sizeof (ip4_header_t));
+ /* Backup the IP4 checksum and address */
+ sum0 = ip4_0->checksum;
+ old0 = ip4_0->dst_address.as_u32;
+
+ /* Update IP address of the packet using the src from the tunnel
+ */
+ ip4_0->dst_address.as_u32 = t0->src.ip4.as_u32;
+
+ /* Fix the IP4 checksum */
+ sum0 = ip_csum_update (sum0, old0, ip4_0->dst_address.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */);
+ ip4_0->checksum = ip_csum_fold (sum0);
}
else
{
- gtpu_hdr_len0 = sizeof(gtpu_header_t) - 4;
+ /* Forward packet instead. Push the IP+UDP header */
+ gtpu_hdr_len0 =
+ -(i32) (sizeof (udp_header_t) + sizeof (ip6_header_t));
+ /* IPv6 UDP checksum is mandatory */
+ int bogus = 0;
+ udp0->checksum =
+ ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip6_0, &bogus);
+ if (udp0->checksum == 0)
+ udp0->checksum = 0xffff;
}
- /* Pop gtpu header */
+ next0:
+ /* Pop/Remove gtpu header from buffered package or push existing
+ * IP+UDP header back to the buffer*/
vlib_buffer_advance (b0, gtpu_hdr_len0);
- next0 = t0->decap_next_index;
- sw_if_index0 = t0->sw_if_index;
- len0 = vlib_buffer_length_in_chain (vm, b0);
+ // where does it need to go in the graph next
+ next0 = t0->decap_next_index;
+ // interface index the package is on
+ sw_if_index0 = t0->sw_if_index;
+ len0 = vlib_buffer_length_in_chain (vm, b0);
- /* Required to make the l2 tag push / pop code work on l2 subifs */
- if (PREDICT_TRUE(next0 == GTPU_INPUT_NEXT_L2_INPUT))
- vnet_update_l2_len (b0);
+ // Next three lines are for forwarding the payload to L2
+ // subinterfaces
+ /* Required to make the l2 tag push / pop code work on l2 subifs */
+ if (PREDICT_TRUE (next0 == GTPU_INPUT_NEXT_L2_INPUT))
+ vnet_update_l2_len (b0);
- /* Set packet input sw_if_index to unicast GTPU tunnel for learning */
- vnet_buffer(b0)->sw_if_index[VLIB_RX] = sw_if_index0;
+ /* Set packet input sw_if_index to unicast GTPU tunnel for learning
+ */
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index0;
+ // in case its a multicast packet set different interface index
sw_if_index0 = (mt0) ? mt0->sw_if_index : sw_if_index0;
- pkts_decapsulated ++;
- stats_n_packets += 1;
- stats_n_bytes += len0;
+ // Update stats
+ pkts_decapsulated++;
+ stats_n_packets += 1;
+ stats_n_bytes += len0;
/* Batch stats increment on the same gtpu tunnel so counter
is not incremented per packet */
tr->next_index = next0;
tr->error = error0;
tr->tunnel_index = tunnel_index0;
- tr->teid = clib_net_to_host_u32(gtpu0->teid);
- }
+ tr->teid = has_space0 ? clib_net_to_host_u32(gtpu0->teid) : ~0;
+
+ if (vlib_buffer_has_space (b0, 4))
+ {
+ tr->header.ver_flags = gtpu0->ver_flags;
+ tr->header.type = gtpu0->type;
+ tr->header.length = clib_net_to_host_u16 (gtpu0->length);
+ }
+ }
- if (PREDICT_FALSE ((gtpu1->ver_flags & GTPU_VER_MASK) != GTPU_V1_VER))
+ /* End of processing for packet 0, start for packet 1 */
+ if (PREDICT_FALSE ((!is_fast_track1) | (!has_space1)))
{
- error1 = GTPU_ERROR_BAD_VER;
+ /* Not fast path. ext1 and gtpu_hdr_len1 might be wrong */
+
+ /* GCC will hopefully fix the duplicate compute */
+ if (PREDICT_FALSE (
+ !((ver1 & (GTPU_VER_MASK | GTPU_PT_BIT | GTPU_RES_BIT)) ==
+ (GTPU_V1_VER | GTPU_PT_BIT)) |
+ (!has_space1)))
+ {
+ /* The header or size is wrong */
+ error1 =
+ has_space1 ? GTPU_ERROR_BAD_VER : GTPU_ERROR_TOO_SMALL;
+ next1 = GTPU_INPUT_NEXT_DROP;
+
+ /* This is an unsupported/bad packet.
+ * Check if it is to be forwarded.
+ */
+ if (is_ip4)
+ tunnel_index1 = gtm->bad_header_forward_tunnel_index_ipv4;
+ else
+ tunnel_index1 = gtm->bad_header_forward_tunnel_index_ipv6;
+
+ if (PREDICT_FALSE (tunnel_index1 != ~0))
+ goto forward1;
+
+ goto trace1;
+ }
+ /* Correct version and has the space. It can only be unknown
+ * message type.
+ */
+ error1 = GTPU_ERROR_UNSUPPORTED_TYPE;
next1 = GTPU_INPUT_NEXT_DROP;
+
+ /* This is an error/nonstandard packet
+ * Check if it is to be forwarded. */
+ if (is_ip4)
+ tunnel_index1 = gtm->unknown_type_forward_tunnel_index_ipv4;
+ else
+ tunnel_index1 = gtm->unknown_type_forward_tunnel_index_ipv6;
+
+ if (PREDICT_FALSE (tunnel_index1 != ~0))
+ goto forward1;
+
+ /* The packet is ipv6/not forwarded */
goto trace1;
}
{
error1 = GTPU_ERROR_NO_SUCH_TUNNEL;
next1 = GTPU_INPUT_NEXT_DROP;
- goto trace1;
- }
- last_key4.as_u64 = key4_1.as_u64;
- tunnel_index1 = last_tunnel_index = p1[0];
- }
- else
- tunnel_index1 = last_tunnel_index;
- t1 = pool_elt_at_index (gtm->tunnels, tunnel_index1);
+ tunnel_index1 =
+ gtm->unknown_teid_forward_tunnel_index_ipv4;
+ if (PREDICT_FALSE (tunnel_index1 != ~0))
+ goto forward1;
+ goto trace1;
+ }
+ last_key4.as_u64 = key4_1.as_u64;
+ tunnel_index1 = last_tunnel_index = p1[0];
+ }
+ else
+ tunnel_index1 = last_tunnel_index;
+ t1 = pool_elt_at_index (gtm->tunnels, tunnel_index1);
/* Validate GTPU tunnel encap-fib index against packet */
if (PREDICT_FALSE (validate_gtpu_fib (b1, t1, is_ip4) == 0))
{
error1 = GTPU_ERROR_NO_SUCH_TUNNEL;
next1 = GTPU_INPUT_NEXT_DROP;
+ tunnel_index1 = gtm->unknown_teid_forward_tunnel_index_ipv4;
+ if (PREDICT_FALSE (tunnel_index1 != ~0))
+ goto forward1;
goto trace1;
}
}
error1 = GTPU_ERROR_NO_SUCH_TUNNEL;
next1 = GTPU_INPUT_NEXT_DROP;
+ tunnel_index1 = gtm->unknown_teid_forward_tunnel_index_ipv4;
+ if (PREDICT_FALSE (tunnel_index1 != ~0))
+ goto forward1;
goto trace1;
} else /* !is_ip4 */ {
{
error1 = GTPU_ERROR_NO_SUCH_TUNNEL;
next1 = GTPU_INPUT_NEXT_DROP;
- goto trace1;
- }
+ tunnel_index1 =
+ gtm->unknown_teid_forward_tunnel_index_ipv6;
+ if (PREDICT_FALSE (tunnel_index1 != ~0))
+ goto forward1;
+ goto trace1;
+ }
- clib_memcpy (&last_key6, &key6_1, sizeof(key6_1));
- tunnel_index1 = last_tunnel_index = p1[0];
- }
- else
- tunnel_index1 = last_tunnel_index;
- t1 = pool_elt_at_index (gtm->tunnels, tunnel_index1);
+ clib_memcpy_fast (&last_key6, &key6_1, sizeof (key6_1));
+ tunnel_index1 = last_tunnel_index = p1[0];
+ }
+ else
+ tunnel_index1 = last_tunnel_index;
+ t1 = pool_elt_at_index (gtm->tunnels, tunnel_index1);
/* Validate GTPU tunnel encap-fib index against packet */
if (PREDICT_FALSE (validate_gtpu_fib (b1, t1, is_ip4) == 0))
{
error1 = GTPU_ERROR_NO_SUCH_TUNNEL;
next1 = GTPU_INPUT_NEXT_DROP;
+ tunnel_index1 = gtm->unknown_teid_forward_tunnel_index_ipv6;
+ if (PREDICT_FALSE (tunnel_index1 != ~0))
+ goto forward1;
goto trace1;
}
}
error1 = GTPU_ERROR_NO_SUCH_TUNNEL;
next1 = GTPU_INPUT_NEXT_DROP;
+ tunnel_index1 = gtm->unknown_teid_forward_tunnel_index_ipv6;
+ if (PREDICT_FALSE (tunnel_index1 != ~0))
+ goto forward1;
goto trace1;
}
+ forward1:
- next1:
- /* Manipulate gtpu header */
- if (PREDICT_FALSE((gtpu1->ver_flags & GTPU_E_S_PN_BIT) != 0))
+ /* Get the tunnel */
+ t1 = pool_elt_at_index (gtm->tunnels, tunnel_index1);
+
+ /* Validate GTPU tunnel encap-fib index against packet */
+ if (PREDICT_FALSE (validate_gtpu_fib (b1, t1, is_ip4) == 0))
{
- gtpu_hdr_len1 = sizeof(gtpu_header_t);
+ error1 = GTPU_ERROR_NO_ERROR_TUNNEL;
+ next1 = GTPU_INPUT_NEXT_DROP;
+ goto trace1;
+ }
- /* Manipulate Sequence Number and N-PDU Number */
- /* TBD */
+ /* Clear the error, next0 will be overwritten by the tunnel */
+ error1 = 0;
- /* Manipulate Next Extension Header */
- /* TBD */
+ if (is_ip4)
+ {
+ /* Forward packet instead. Push the IP+UDP header */
+ gtpu_hdr_len1 =
+ -(i32) (sizeof (udp_header_t) + sizeof (ip4_header_t));
+
+ /* Backup the IP4 checksum and address */
+ sum1 = ip4_1->checksum;
+ old1 = ip4_1->dst_address.as_u32;
+
+ /* Update IP address of the packet using the src from the tunnel
+ */
+ ip4_1->dst_address.as_u32 = t1->src.ip4.as_u32;
+
+ /* Fix the IP4 checksum */
+ sum1 = ip_csum_update (sum1, old1, ip4_1->dst_address.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */);
+ ip4_1->checksum = ip_csum_fold (sum1);
}
else
{
- gtpu_hdr_len1 = sizeof(gtpu_header_t) - 4;
+ /* Forward packet instead. Push the IP+UDP header */
+ gtpu_hdr_len1 =
+ -(i32) (sizeof (udp_header_t) + sizeof (ip6_header_t));
+
+ /* IPv6 UDP checksum is mandatory */
+ int bogus = 0;
+ udp1->checksum =
+ ip6_tcp_udp_icmp_compute_checksum (vm, b1, ip6_1, &bogus);
+ if (udp1->checksum == 0)
+ udp1->checksum = 0xffff;
}
- /* Pop gtpu header */
+ next1:
+ /* Pop gtpu header / push IP+UDP header */
vlib_buffer_advance (b1, gtpu_hdr_len1);
next1 = t1->decap_next_index;
tr->next_index = next1;
tr->error = error1;
tr->tunnel_index = tunnel_index1;
- tr->teid = clib_net_to_host_u32(gtpu1->teid);
- }
+ tr->teid = has_space1 ? clib_net_to_host_u32(gtpu1->teid) : ~0;
+ if (vlib_buffer_has_space (b1, 4))
+ {
+ tr->header.ver_flags = gtpu1->ver_flags;
+ tr->header.type = gtpu1->type;
+ tr->header.length = clib_net_to_host_u16 (gtpu1->length);
+ }
+ }
vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
to_next, n_left_to_next,
bi0, bi1, next0, next1);
}
+ /* In case there are less than 4 packets left in frame and packets in
+ current frame aka single processing */
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 bi0;
ip4_header_t * ip4_0;
ip6_header_t * ip6_0;
gtpu_header_t * gtpu0;
- u32 gtpu_hdr_len0 = 0;
+ i32 gtpu_hdr_len0;
uword * p0;
u32 tunnel_index0;
gtpu_tunnel_t * t0, * mt0 = NULL;
gtpu6_tunnel_key_t key6_0;
u32 error0;
u32 sw_if_index0, len0;
+ u8 has_space0;
+ u8 ver0;
+ udp_header_t *udp0;
+ ip_csum_t sum0;
+ u32 old0;
+ gtpu_ext_header_t ext = { .type = 0, .len = 0, .pad = 0 };
+ gtpu_ext_header_t *ext0;
+ bool is_fast_track0;
+ ext0 = &ext;
bi0 = from[0];
to_next[0] = bi0;
/* udp leaves current_data pointing at the gtpu header */
gtpu0 = vlib_buffer_get_current (b0);
if (is_ip4) {
- vlib_buffer_advance
- (b0, -(word)(sizeof(udp_header_t)+sizeof(ip4_header_t)));
- ip4_0 = vlib_buffer_get_current (b0);
+ ip4_0 = (void *)((u8*)gtpu0 - sizeof(udp_header_t) - sizeof(ip4_header_t));
} else {
- vlib_buffer_advance
- (b0, -(word)(sizeof(udp_header_t)+sizeof(ip6_header_t)));
- ip6_0 = vlib_buffer_get_current (b0);
+ ip6_0 = (void *)((u8*)gtpu0 - sizeof(udp_header_t) - sizeof(ip6_header_t));
}
+ udp0 = (void *) ((u8 *) gtpu0 - sizeof (udp_header_t));
- /* pop (ip, udp) */
- if (is_ip4) {
- vlib_buffer_advance
- (b0, sizeof(*ip4_0)+sizeof(udp_header_t));
- } else {
- vlib_buffer_advance
- (b0, sizeof(*ip6_0)+sizeof(udp_header_t));
- }
+ tunnel_index0 = ~0;
+ error0 = 0;
+
+ /* speculatively load gtp header version field */
+ ver0 = gtpu0->ver_flags;
+ /*
+ * Manipulate gtpu header
+ * TBD: Manipulate Sequence Number and N-PDU Number
+ * TBD: Manipulate Next Extension Header
+ */
+
+ is_fast_track0 =
+ ((ver0 & (GTPU_VER_MASK | GTPU_PT_BIT | GTPU_RES_BIT)) ==
+ (GTPU_V1_VER | GTPU_PT_BIT));
+ is_fast_track0 = is_fast_track0 & (gtpu0->type == 255);
+
+ ext0 = (ver0 & GTPU_E_BIT) ?
+ (gtpu_ext_header_t *) >pu0->next_ext_type :
+ &ext;
+
+ gtpu_hdr_len0 = sizeof (gtpu_header_t) -
+ (((ver0 & GTPU_E_S_PN_BIT) == 0) * 4) +
+ ext0->len * 4;
- tunnel_index0 = ~0;
- error0 = 0;
- if (PREDICT_FALSE ((gtpu0->ver_flags & GTPU_VER_MASK) != GTPU_V1_VER))
+ ext0 += ext0->len * 4 / sizeof (*ext0);
+
+ has_space0 = vlib_buffer_has_space (b0, gtpu_hdr_len0);
+
+ if (PREDICT_FALSE ((!is_fast_track0) | (!has_space0)))
{
- error0 = GTPU_ERROR_BAD_VER;
- next0 = GTPU_INPUT_NEXT_DROP;
- goto trace00;
- }
+ /* Not fast path. ext0 and gtpu_hdr_len0 might be wrong */
+
+ /* GCC will hopefully fix the duplicate compute */
+ if (PREDICT_FALSE (
+ !((ver0 & (GTPU_VER_MASK | GTPU_PT_BIT | GTPU_RES_BIT)) ==
+ (GTPU_V1_VER | GTPU_PT_BIT)) |
+ (!has_space0)))
+ {
+ /* The header or size is wrong */
+ error0 =
+ has_space0 ? GTPU_ERROR_BAD_VER : GTPU_ERROR_TOO_SMALL;
+ next0 = GTPU_INPUT_NEXT_DROP;
+
+ /* This is an unsupported/bad packet.
+ * Check if it is to be forwarded.
+ */
+ if (is_ip4)
+ tunnel_index0 = gtm->bad_header_forward_tunnel_index_ipv4;
+ else
+ tunnel_index0 = gtm->bad_header_forward_tunnel_index_ipv6;
- if (is_ip4) {
- key4_0.src = ip4_0->src_address.as_u32;
- key4_0.teid = gtpu0->teid;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward00;
- /* Make sure GTPU tunnel exist according to packet SIP and teid
- * SIP identify a GTPU path, and teid identify a tunnel in a given GTPU path */
- if (PREDICT_FALSE (key4_0.as_u64 != last_key4.as_u64))
- {
- p0 = hash_get (gtm->gtpu4_tunnel_by_key, key4_0.as_u64);
- if (PREDICT_FALSE (p0 == NULL))
- {
- error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
- next0 = GTPU_INPUT_NEXT_DROP;
- goto trace00;
- }
- last_key4.as_u64 = key4_0.as_u64;
- tunnel_index0 = last_tunnel_index = p0[0];
- }
- else
- tunnel_index0 = last_tunnel_index;
- t0 = pool_elt_at_index (gtm->tunnels, tunnel_index0);
+ goto trace00;
+ }
+ /* Correct version and has the space. It can only be unknown
+ * message type
+ */
+ error0 = GTPU_ERROR_UNSUPPORTED_TYPE;
+ next0 = GTPU_INPUT_NEXT_DROP;
- /* Validate GTPU tunnel encap-fib index against packet */
- if (PREDICT_FALSE (validate_gtpu_fib (b0, t0, is_ip4) == 0))
- {
- error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
- next0 = GTPU_INPUT_NEXT_DROP;
- goto trace00;
- }
+ /* This is an error/nonstandard packet
+ * Check if it is to be forwarded. */
+ if (is_ip4)
+ tunnel_index0 = gtm->unknown_type_forward_tunnel_index_ipv4;
+ else
+ tunnel_index0 = gtm->unknown_type_forward_tunnel_index_ipv6;
- /* Validate GTPU tunnel SIP against packet DIP */
- if (PREDICT_TRUE (ip4_0->dst_address.as_u32 == t0->src.ip4.as_u32))
- goto next00; /* valid packet */
- if (PREDICT_FALSE (ip4_address_is_multicast (&ip4_0->dst_address)))
- {
- key4_0.src = ip4_0->dst_address.as_u32;
- key4_0.teid = gtpu0->teid;
- /* Make sure mcast GTPU tunnel exist by packet DIP and teid */
- p0 = hash_get (gtm->gtpu4_tunnel_by_key, key4_0.as_u64);
- if (PREDICT_TRUE (p0 != NULL))
- {
- mt0 = pool_elt_at_index (gtm->tunnels, p0[0]);
- goto next00; /* valid packet */
- }
- }
- error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
- next0 = GTPU_INPUT_NEXT_DROP;
- goto trace00;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward00;
- } else /* !is_ip4 */ {
- key6_0.src.as_u64[0] = ip6_0->src_address.as_u64[0];
- key6_0.src.as_u64[1] = ip6_0->src_address.as_u64[1];
- key6_0.teid = gtpu0->teid;
+ /* The packet is ipv6/not forwarded */
+ goto trace00;
+ }
- /* Make sure GTPU tunnel exist according to packet SIP and teid
- * SIP identify a GTPU path, and teid identify a tunnel in a given GTPU path */
- if (PREDICT_FALSE (memcmp(&key6_0, &last_key6, sizeof(last_key6)) != 0))
- {
- p0 = hash_get_mem (gtm->gtpu6_tunnel_by_key, &key6_0);
- if (PREDICT_FALSE (p0 == NULL))
- {
- error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
- next0 = GTPU_INPUT_NEXT_DROP;
- goto trace00;
- }
- clib_memcpy (&last_key6, &key6_0, sizeof(key6_0));
- tunnel_index0 = last_tunnel_index = p0[0];
- }
- else
- tunnel_index0 = last_tunnel_index;
- t0 = pool_elt_at_index (gtm->tunnels, tunnel_index0);
+ if (is_ip4)
+ {
+ key4_0.src = ip4_0->src_address.as_u32;
+ key4_0.teid = gtpu0->teid;
+
+ /* Make sure GTPU tunnel exist according to packet SIP and teid
+ * SIP identify a GTPU path, and teid identify a tunnel in a
+ * given GTPU path */
+ if (PREDICT_FALSE (key4_0.as_u64 != last_key4.as_u64))
+ {
+ // Cache miss, so try normal lookup now.
+ p0 = hash_get (gtm->gtpu4_tunnel_by_key, key4_0.as_u64);
+ if (PREDICT_FALSE (p0 == NULL))
+ {
+ error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
+ next0 = GTPU_INPUT_NEXT_DROP;
+
+ /* This is a standard packet, but no tunnel was found.
+ * Check if it is to be forwarded. */
+ tunnel_index0 =
+ gtm->unknown_teid_forward_tunnel_index_ipv4;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward00;
+ goto trace00;
+ }
+ // Update the key/tunnel cache for normal packets
+ last_key4.as_u64 = key4_0.as_u64;
+ tunnel_index0 = last_tunnel_index = p0[0];
+ }
+ else
+ tunnel_index0 = last_tunnel_index;
+ t0 = pool_elt_at_index (gtm->tunnels, tunnel_index0);
+
+ /* Validate GTPU tunnel encap-fib index against packet */
+ if (PREDICT_FALSE (validate_gtpu_fib (b0, t0, is_ip4) == 0))
+ {
+ error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
+ next0 = GTPU_INPUT_NEXT_DROP;
+ tunnel_index0 = gtm->unknown_teid_forward_tunnel_index_ipv4;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward00;
+ goto trace00;
+ }
- /* Validate GTPU tunnel encap-fib index against packet */
- if (PREDICT_FALSE (validate_gtpu_fib (b0, t0, is_ip4) == 0))
- {
- error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
- next0 = GTPU_INPUT_NEXT_DROP;
- goto trace00;
- }
+ /* Validate GTPU tunnel SIP against packet DIP */
+ if (PREDICT_TRUE (ip4_0->dst_address.as_u32 ==
+ t0->src.ip4.as_u32))
+ goto next00; /* valid packet */
+ if (PREDICT_FALSE (
+ ip4_address_is_multicast (&ip4_0->dst_address)))
+ {
+ key4_0.src = ip4_0->dst_address.as_u32;
+ key4_0.teid = gtpu0->teid;
+ /* Make sure mcast GTPU tunnel exist by packet DIP and teid
+ */
+ p0 = hash_get (gtm->gtpu4_tunnel_by_key, key4_0.as_u64);
+ if (PREDICT_TRUE (p0 != NULL))
+ {
+ mt0 = pool_elt_at_index (gtm->tunnels, p0[0]);
+ goto next00; /* valid packet */
+ }
+ }
+ error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
+ next0 = GTPU_INPUT_NEXT_DROP;
+ tunnel_index0 = gtm->unknown_teid_forward_tunnel_index_ipv4;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward00;
+ goto trace00;
+ }
+ else /* !is_ip4 */
+ {
+ key6_0.src.as_u64[0] = ip6_0->src_address.as_u64[0];
+ key6_0.src.as_u64[1] = ip6_0->src_address.as_u64[1];
+ key6_0.teid = gtpu0->teid;
+
+ /* Make sure GTPU tunnel exist according to packet SIP and teid
+ * SIP identify a GTPU path, and teid identify a tunnel in a
+ * given GTPU path */
+ if (PREDICT_FALSE (
+ memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0))
+ {
+ p0 = hash_get_mem (gtm->gtpu6_tunnel_by_key, &key6_0);
+ if (PREDICT_FALSE (p0 == NULL))
+ {
+ error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
+ next0 = GTPU_INPUT_NEXT_DROP;
+ tunnel_index0 =
+ gtm->unknown_teid_forward_tunnel_index_ipv6;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward00;
+ goto trace00;
+ }
+ clib_memcpy_fast (&last_key6, &key6_0, sizeof (key6_0));
+ tunnel_index0 = last_tunnel_index = p0[0];
+ }
+ else
+ tunnel_index0 = last_tunnel_index;
+ t0 = pool_elt_at_index (gtm->tunnels, tunnel_index0);
+
+ /* Validate GTPU tunnel encap-fib index against packet */
+ if (PREDICT_FALSE (validate_gtpu_fib (b0, t0, is_ip4) == 0))
+ {
+ error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
+ next0 = GTPU_INPUT_NEXT_DROP;
+ tunnel_index0 = gtm->unknown_teid_forward_tunnel_index_ipv6;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward00;
+ goto trace00;
+ }
- /* Validate GTPU tunnel SIP against packet DIP */
- if (PREDICT_TRUE (ip6_address_is_equal (&ip6_0->dst_address,
- &t0->src.ip6)))
+ /* Validate GTPU tunnel SIP against packet DIP */
+ if (PREDICT_TRUE (
+ ip6_address_is_equal (&ip6_0->dst_address, &t0->src.ip6)))
goto next00; /* valid packet */
if (PREDICT_FALSE (ip6_address_is_multicast (&ip6_0->dst_address)))
{
}
error0 = GTPU_ERROR_NO_SUCH_TUNNEL;
next0 = GTPU_INPUT_NEXT_DROP;
+ tunnel_index0 = gtm->unknown_teid_forward_tunnel_index_ipv6;
+ if (PREDICT_FALSE (tunnel_index0 != ~0))
+ goto forward00;
goto trace00;
- }
+ }
- next00:
- /* Manipulate gtpu header */
- if (PREDICT_FALSE((gtpu0->ver_flags & GTPU_E_S_PN_BIT) != 0))
+ /* This can only be reached via goto */
+ forward00:
+ // Get the tunnel
+ t0 = pool_elt_at_index (gtm->tunnels, tunnel_index0);
+
+ /* Validate GTPU tunnel encap-fib index against packet */
+ if (PREDICT_FALSE (validate_gtpu_fib (b0, t0, is_ip4) == 0))
{
- gtpu_hdr_len0 = sizeof(gtpu_header_t);
+ error0 = GTPU_ERROR_NO_ERROR_TUNNEL;
+ next0 = GTPU_INPUT_NEXT_DROP;
+ goto trace00;
+ }
- /* Manipulate Sequence Number and N-PDU Number */
- /* TBD */
+ /* Clear the error, next0 will be overwritten by the tunnel */
+ error0 = 0;
- /* Manipulate Next Extension Header */
- /* TBD */
+ if (is_ip4)
+ {
+ /* Forward packet instead. Push the IP+UDP header */
+ gtpu_hdr_len0 =
+ -(i32) (sizeof (udp_header_t) + sizeof (ip4_header_t));
+ /* Backup the IP4 checksum and address */
+ sum0 = ip4_0->checksum;
+ old0 = ip4_0->dst_address.as_u32;
+
+ /* Update IP address of the packet using the src from the tunnel
+ */
+ ip4_0->dst_address.as_u32 = t0->src.ip4.as_u32;
+
+ /* Fix the IP4 checksum */
+ sum0 = ip_csum_update (sum0, old0, ip4_0->dst_address.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */);
+ ip4_0->checksum = ip_csum_fold (sum0);
}
else
{
- gtpu_hdr_len0 = sizeof(gtpu_header_t) - 4;
+ /* Forward packet instead. Push the IP+UDP header */
+ gtpu_hdr_len0 =
+ -(i32) (sizeof (udp_header_t) + sizeof (ip6_header_t));
+
+ /* IPv6 UDP checksum is mandatory */
+ int bogus = 0;
+ udp0->checksum =
+ ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip6_0, &bogus);
+ if (udp0->checksum == 0)
+ udp0->checksum = 0xffff;
}
- /* Pop gtpu header */
+ next00:
+ /* Pop gtpu header / push IP+UDP header */
vlib_buffer_advance (b0, gtpu_hdr_len0);
next0 = t0->decap_next_index;
tr->next_index = next0;
tr->error = error0;
tr->tunnel_index = tunnel_index0;
- tr->teid = clib_net_to_host_u32(gtpu0->teid);
- }
+ tr->teid = has_space0 ? clib_net_to_host_u32(gtpu0->teid) : ~0;
+ if (vlib_buffer_has_space (b0, 4))
+ {
+ tr->header.ver_flags = gtpu0->ver_flags;
+ tr->header.type = gtpu0->type;
+ tr->header.length = clib_net_to_host_u16 (gtpu0->length);
+ }
+ }
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi0, next0);
return from_frame->n_vectors;
}
-static uword
-gtpu4_input (vlib_main_t * vm,
+VLIB_NODE_FN (gtpu4_input_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
return gtpu_input(vm, node, from_frame, /* is_ip4 */ 1);
}
-static uword
-gtpu6_input (vlib_main_t * vm,
+VLIB_NODE_FN (gtpu6_input_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
};
VLIB_REGISTER_NODE (gtpu4_input_node) = {
- .function = gtpu4_input,
.name = "gtpu4-input",
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
// $$$$ .unformat_buffer = unformat_gtpu_header,
};
-VLIB_NODE_FUNCTION_MULTIARCH (gtpu4_input_node, gtpu4_input)
-
VLIB_REGISTER_NODE (gtpu6_input_node) = {
- .function = gtpu6_input,
.name = "gtpu6-input",
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
// $$$$ .unformat_buffer = unformat_gtpu_header,
};
-VLIB_NODE_FUNCTION_MULTIARCH (gtpu6_input_node, gtpu6_input)
-
-
typedef enum {
IP_GTPU_BYPASS_NEXT_DROP,
IP_GTPU_BYPASS_NEXT_GTPU,
IP_GTPU_BYPASS_N_NEXT,
} ip_vxan_bypass_next_t;
+/* this function determines if a udp packet is actually gtpu and needs
+ forwarding to gtpu_input */
always_inline uword
ip_gtpu_bypass_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
gtpu_main_t * gtm = >pu_main;
u32 * from, * to_next, n_left_from, n_left_to_next, next_index;
vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip4_input_node.index);
- ip4_address_t addr4; /* last IPv4 address matching a local VTEP address */
- ip6_address_t addr6; /* last IPv6 address matching a local VTEP address */
+ vtep4_key_t last_vtep4; /* last IPv4 address / fib index
+ matching a local VTEP address */
+ vtep6_key_t last_vtep6; /* last IPv6 address / fib index
+ matching a local VTEP address */
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
+ vlib_get_buffers (vm, from, bufs, n_left_from);
if (node->flags & VLIB_NODE_FLAG_TRACE)
ip4_forward_next_trace (vm, node, frame, VLIB_TX);
- if (is_ip4) addr4.data_u32 = ~0;
- else ip6_address_set_zero (&addr6);
+ if (is_ip4)
+ vtep4_key_init (&last_vtep4);
+ else
+ vtep6_key_init (&last_vtep6);
while (n_left_from > 0)
{
/* Prefetch next iteration. */
{
- vlib_buffer_t * p2, * p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
+ vlib_prefetch_buffer_header (b[2], LOAD);
+ vlib_prefetch_buffer_header (b[3], LOAD);
- CLIB_PREFETCH (p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (b[2]->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (b[3]->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
}
bi0 = to_next[0] = from[0];
to_next += 2;
n_left_to_next -= 2;
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
+ b0 = b[0];
+ b1 = b[1];
+ b += 2;
if (is_ip4)
{
ip40 = vlib_buffer_get_current (b0);
/* Validate DIP against VTEPs*/
if (is_ip4)
{
- if (addr4.as_u32 != ip40->dst_address.as_u32)
- {
- if (!hash_get (gtm->vtep4, ip40->dst_address.as_u32))
- goto exit0; /* no local VTEP for GTPU packet */
- addr4 = ip40->dst_address;
- }
+#ifdef CLIB_HAVE_VEC512
+ if (!vtep4_check_vector (>m->vtep_table, b0, ip40, &last_vtep4,
+ >m->vtep4_u512))
+#else
+ if (!vtep4_check (>m->vtep_table, b0, ip40, &last_vtep4))
+#endif
+ goto exit0; /* no local VTEP for GTPU packet */
}
else
{
- if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
- {
- if (!hash_get_mem (gtm->vtep6, &ip60->dst_address))
- goto exit0; /* no local VTEP for GTPU packet */
- addr6 = ip60->dst_address;
- }
+ if (!vtep6_check (>m->vtep_table, b0, ip60, &last_vtep6))
+ goto exit0; /* no local VTEP for GTPU packet */
}
flags0 = b0->flags;
/* Validate DIP against VTEPs*/
if (is_ip4)
{
- if (addr4.as_u32 != ip41->dst_address.as_u32)
- {
- if (!hash_get (gtm->vtep4, ip41->dst_address.as_u32))
- goto exit1; /* no local VTEP for GTPU packet */
- addr4 = ip41->dst_address;
- }
+#ifdef CLIB_HAVE_VEC512
+ if (!vtep4_check_vector (>m->vtep_table, b1, ip41, &last_vtep4,
+ >m->vtep4_u512))
+#else
+ if (!vtep4_check (>m->vtep_table, b1, ip41, &last_vtep4))
+#endif
+ goto exit1; /* no local VTEP for GTPU packet */
}
else
{
- if (!ip6_address_is_equal (&addr6, &ip61->dst_address))
- {
- if (!hash_get_mem (gtm->vtep6, &ip61->dst_address))
- goto exit1; /* no local VTEP for GTPU packet */
- addr6 = ip61->dst_address;
- }
+ if (!vtep6_check (>m->vtep_table, b1, ip61, &last_vtep6))
+ goto exit1; /* no local VTEP for GTPU packet */
}
flags1 = b1->flags;
to_next += 1;
n_left_to_next -= 1;
- b0 = vlib_get_buffer (vm, bi0);
+ b0 = b[0];
+ b++;
if (is_ip4)
ip40 = vlib_buffer_get_current (b0);
else
/* Validate DIP against VTEPs*/
if (is_ip4)
{
- if (addr4.as_u32 != ip40->dst_address.as_u32)
- {
- if (!hash_get (gtm->vtep4, ip40->dst_address.as_u32))
- goto exit; /* no local VTEP for GTPU packet */
- addr4 = ip40->dst_address;
- }
+#ifdef CLIB_HAVE_VEC512
+ if (!vtep4_check_vector (>m->vtep_table, b0, ip40, &last_vtep4,
+ >m->vtep4_u512))
+#else
+ if (!vtep4_check (>m->vtep_table, b0, ip40, &last_vtep4))
+#endif
+ goto exit; /* no local VTEP for GTPU packet */
}
else
{
- if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
- {
- if (!hash_get_mem (gtm->vtep6, &ip60->dst_address))
- goto exit; /* no local VTEP for GTPU packet */
- addr6 = ip60->dst_address;
- }
+ if (!vtep6_check (>m->vtep_table, b0, ip60, &last_vtep6))
+ goto exit; /* no local VTEP for GTPU packet */
}
flags0 = b0->flags;
return frame->n_vectors;
}
-static uword
-ip4_gtpu_bypass (vlib_main_t * vm,
+VLIB_NODE_FN (ip4_gtpu_bypass_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
}
VLIB_REGISTER_NODE (ip4_gtpu_bypass_node) = {
- .function = ip4_gtpu_bypass,
.name = "ip4-gtpu-bypass",
.vector_size = sizeof (u32),
.format_trace = format_ip4_forward_next_trace,
};
-VLIB_NODE_FUNCTION_MULTIARCH (ip4_gtpu_bypass_node,ip4_gtpu_bypass)
-
+#ifndef CLIB_MARCH_VARIANT
/* Dummy init function to get us linked in. */
clib_error_t * ip4_gtpu_bypass_init (vlib_main_t * vm)
{ return 0; }
VLIB_INIT_FUNCTION (ip4_gtpu_bypass_init);
+#endif /* CLIB_MARCH_VARIANT */
-static uword
-ip6_gtpu_bypass (vlib_main_t * vm,
+VLIB_NODE_FN (ip6_gtpu_bypass_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
}
VLIB_REGISTER_NODE (ip6_gtpu_bypass_node) = {
- .function = ip6_gtpu_bypass,
.name = "ip6-gtpu-bypass",
.vector_size = sizeof (u32),
.format_trace = format_ip6_forward_next_trace,
};
-VLIB_NODE_FUNCTION_MULTIARCH (ip6_gtpu_bypass_node,ip6_gtpu_bypass)
-
+#ifndef CLIB_MARCH_VARIANT
/* Dummy init function to get us linked in. */
clib_error_t * ip6_gtpu_bypass_init (vlib_main_t * vm)
{ return 0; }
VLIB_INIT_FUNCTION (ip6_gtpu_bypass_init);
+
+#define foreach_gtpu_flow_error \
+ _(NONE, "no error") \
+ _(PAYLOAD_ERROR, "Payload type errors") \
+ _(IP_CHECKSUM_ERROR, "Rx ip checksum errors") \
+ _(IP_HEADER_ERROR, "Rx ip header errors") \
+ _(UDP_CHECKSUM_ERROR, "Rx udp checksum errors") \
+ _(UDP_LENGTH_ERROR, "Rx udp length errors")
+
+typedef enum
+{
+#define _(f,s) GTPU_FLOW_ERROR_##f,
+ foreach_gtpu_flow_error
+#undef _
+#define gtpu_error(n,s) GTPU_FLOW_ERROR_##n,
+#include <gtpu/gtpu_error.def>
+#undef gtpu_error
+ GTPU_FLOW_N_ERROR,
+} gtpu_flow_error_t;
+
+static char *gtpu_flow_error_strings[] = {
+#define _(n,s) s,
+ foreach_gtpu_flow_error
+#undef _
+#define gtpu_error(n,s) s,
+#include <gtpu/gtpu_error.def>
+#undef gtpu_error
+#undef _
+
+};
+
+#define gtpu_local_need_csum_check(_b) \
+ (!(_b->flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED || \
+ (_b->flags & VNET_BUFFER_F_OFFLOAD && \
+ vnet_buffer (_b)->oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)))
+
+#define gtpu_local_csum_is_valid(_b) \
+ ((_b->flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT || \
+ (_b->flags & VNET_BUFFER_F_OFFLOAD && \
+ vnet_buffer (_b)->oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)) != 0)
+
+static_always_inline u8
+gtpu_validate_udp_csum (vlib_main_t * vm, vlib_buffer_t *b)
+{
+ u32 flags = b->flags;
+ enum { offset = sizeof(ip4_header_t) + sizeof(udp_header_t)};
+
+ /* Verify UDP checksum */
+ if ((flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
+ {
+ vlib_buffer_advance (b, -offset);
+ flags = ip4_tcp_udp_validate_checksum (vm, b);
+ vlib_buffer_advance (b, offset);
+ }
+
+ return (flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
+}
+
+static_always_inline u8
+gtpu_check_ip (vlib_buffer_t *b, u16 payload_len)
+{
+ ip4_header_t * ip4_hdr = vlib_buffer_get_current(b) -
+ sizeof(ip4_header_t) - sizeof(udp_header_t);
+ u16 ip_len = clib_net_to_host_u16 (ip4_hdr->length);
+ u16 expected = payload_len + sizeof(ip4_header_t) + sizeof(udp_header_t);
+ return ip_len > expected || ip4_hdr->ttl == 0 || ip4_hdr->ip_version_and_header_length != 0x45;
+}
+
+static_always_inline u8
+gtpu_check_ip_udp_len (vlib_buffer_t *b)
+{
+ ip4_header_t * ip4_hdr = vlib_buffer_get_current(b) -
+ sizeof(ip4_header_t) - sizeof(udp_header_t);
+ udp_header_t * udp_hdr = vlib_buffer_get_current(b) - sizeof(udp_header_t);
+ u16 ip_len = clib_net_to_host_u16 (ip4_hdr->length);
+ u16 udp_len = clib_net_to_host_u16 (udp_hdr->length);
+ return udp_len > ip_len;
+}
+
+static_always_inline u8
+gtpu_err_code (u8 ip_err0, u8 udp_err0, u8 csum_err0)
+{
+ u8 error0 = GTPU_FLOW_ERROR_NONE;
+ if (ip_err0)
+ error0 = GTPU_FLOW_ERROR_IP_HEADER_ERROR;
+ if (udp_err0)
+ error0 = GTPU_FLOW_ERROR_UDP_LENGTH_ERROR;
+ if (csum_err0)
+ error0 = GTPU_FLOW_ERROR_UDP_CHECKSUM_ERROR;
+ return error0;
+}
+
+
+always_inline uword
+gtpu_flow_input (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ u32 n_left_from, next_index, * from, * to_next;
+ gtpu_main_t * gtm = >pu_main;
+ vnet_main_t * vnm = gtm->vnet_main;
+ vnet_interface_main_t * im = &vnm->interface_main;
+ u32 pkts_decapsulated = 0;
+ u32 thread_index = vlib_get_thread_index();
+ u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
+ u8 ip_err0, ip_err1, udp_err0, udp_err1, csum_err0, csum_err1;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+ stats_sw_if_index = node->runtime_data[0];
+ stats_n_packets = stats_n_bytes = 0;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index,
+ to_next, n_left_to_next);
+
+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0, bi1;
+ vlib_buffer_t * b0, * b1;
+ u32 next0, next1;
+ gtpu_header_t * gtpu0, * gtpu1;
+ u32 gtpu_hdr_len0, gtpu_hdr_len1;
+ u32 tunnel_index0, tunnel_index1;
+ gtpu_tunnel_t * t0, * t1;
+ u32 error0, error1;
+ u32 sw_if_index0, sw_if_index1, len0, len1;
+ u8 has_space0 = 0, has_space1 = 0;
+ u8 ver0, ver1;
+ gtpu_ext_header_t ext = { .type = 0, .len = 0, .pad = 0 };
+ gtpu_ext_header_t *ext0, *ext1;
+ bool is_fast_track0, is_fast_track1;
+ ext0 = ext1 = &ext;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t *p2, *p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
+
+ CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
+ }
+
+ bi0 = from[0];
+ bi1 = from[1];
+ to_next[0] = bi0;
+ to_next[1] = bi1;
+ from += 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+ n_left_from -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ /* udp leaves current_data pointing at the gtpu header */
+ gtpu0 = vlib_buffer_get_current (b0);
+ gtpu1 = vlib_buffer_get_current (b1);
+
+ len0 = vlib_buffer_length_in_chain (vm, b0);
+ len1 = vlib_buffer_length_in_chain (vm, b1);
+
+ tunnel_index0 = ~0;
+ error0 = 0;
+
+ tunnel_index1 = ~0;
+ error1 = 0;
+
+ ip_err0 = gtpu_check_ip (b0, len0);
+ udp_err0 = gtpu_check_ip_udp_len (b0);
+ ip_err1 = gtpu_check_ip (b1, len1);
+ udp_err1 = gtpu_check_ip_udp_len (b1);
+
+ if (PREDICT_FALSE (gtpu_local_need_csum_check (b0)))
+ csum_err0 = !gtpu_validate_udp_csum (vm, b0);
+ else
+ csum_err0 = !gtpu_local_csum_is_valid (b0);
+ if (PREDICT_FALSE (gtpu_local_need_csum_check (b1)))
+ csum_err1 = !gtpu_validate_udp_csum (vm, b1);
+ else
+ csum_err1 = !gtpu_local_csum_is_valid (b1);
+
+ /* speculatively load gtp header version field */
+ ver0 = gtpu0->ver_flags;
+ ver1 = gtpu1->ver_flags;
+
+ /*
+ * Manipulate gtpu header
+ * TBD: Manipulate Sequence Number and N-PDU Number
+ * TBD: Manipulate Next Extension Header
+ */
+ is_fast_track0 =
+ ((ver0 & (GTPU_VER_MASK | GTPU_PT_BIT | GTPU_RES_BIT)) ==
+ (GTPU_V1_VER | GTPU_PT_BIT));
+ is_fast_track0 = is_fast_track0 & (gtpu0->type == 255);
+
+ is_fast_track1 =
+ ((ver1 & (GTPU_VER_MASK | GTPU_PT_BIT | GTPU_RES_BIT)) ==
+ (GTPU_V1_VER | GTPU_PT_BIT));
+ is_fast_track1 = is_fast_track1 & (gtpu1->type == 255);
+
+ ext0 = (ver0 & GTPU_E_BIT) ?
+ (gtpu_ext_header_t *) >pu0->next_ext_type :
+ &ext;
+ ext1 = (ver1 & GTPU_E_BIT) ?
+ (gtpu_ext_header_t *) >pu1->next_ext_type :
+ &ext;
+
+ gtpu_hdr_len0 = sizeof (gtpu_header_t) -
+ (((ver0 & GTPU_E_S_PN_BIT) == 0) * 4) +
+ ext0->len * 4;
+ gtpu_hdr_len1 = sizeof (gtpu_header_t) -
+ (((ver1 & GTPU_E_S_PN_BIT) == 0) * 4) +
+ ext1->len * 4;
+
+ /* Only for clarity, will be optimized away */
+ ext0 += ext0->len * 4 / sizeof (*ext0);
+ ext1 += ext1->len * 4 / sizeof (*ext1);
+
+ has_space0 = vlib_buffer_has_space (b0, gtpu_hdr_len0);
+ has_space1 = vlib_buffer_has_space (b1, gtpu_hdr_len1);
+
+ if (ip_err0 || udp_err0 || csum_err0)
+ {
+ next0 = GTPU_INPUT_NEXT_DROP;
+ error0 = gtpu_err_code (ip_err0, udp_err0, csum_err0);
+ goto trace0;
+ }
+
+ /* Diverge the packet paths for 0 and 1 */
+ if (PREDICT_FALSE ((!is_fast_track0) | (!has_space0)))
+ {
+ /* Not fast path. ext0 and gtpu_hdr_len0 might be wrong */
+
+ /* GCC will hopefully fix the duplicate compute */
+ if (PREDICT_FALSE (
+ !((ver0 & (GTPU_VER_MASK | GTPU_PT_BIT | GTPU_RES_BIT)) ==
+ (GTPU_V1_VER | GTPU_PT_BIT)) |
+ (!has_space0)))
+ {
+ /* The header or size is wrong */
+ error0 =
+ has_space0 ? GTPU_ERROR_BAD_VER : GTPU_ERROR_TOO_SMALL;
+ next0 = GTPU_INPUT_NEXT_DROP;
+ goto trace0;
+ }
+ /* Correct version and has the space. It can only be unknown
+ * message type.
+ */
+ error0 = GTPU_ERROR_UNSUPPORTED_TYPE;
+ next0 = GTPU_INPUT_NEXT_DROP;
+
+ /* The packet is not forwarded */
+ goto trace0;
+ }
+
+ /* Manipulate packet 0 */
+ ASSERT (b0->flow_id != 0);
+ tunnel_index0 = b0->flow_id - gtm->flow_id_start;
+ t0 = pool_elt_at_index (gtm->tunnels, tunnel_index0);
+ b0->flow_id = 0;
+
+ /* Pop gtpu header */
+ vlib_buffer_advance (b0, gtpu_hdr_len0);
+
+ /* assign the next node */
+ if (PREDICT_FALSE (t0->decap_next_index !=
+ GTPU_INPUT_NEXT_IP4_INPUT) &&
+ (t0->decap_next_index != GTPU_INPUT_NEXT_IP6_INPUT))
+ {
+ error0 = GTPU_FLOW_ERROR_PAYLOAD_ERROR;
+ next0 = GTPU_INPUT_NEXT_DROP;
+ goto trace0;
+ }
+ next0 = t0->decap_next_index;
+
+ sw_if_index0 = t0->sw_if_index;
+
+ /* Set packet input sw_if_index to unicast GTPU tunnel for learning
+ */
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index0;
+
+ pkts_decapsulated++;
+ stats_n_packets += 1;
+ stats_n_bytes += len0;
+
+ /* Batch stats increment on the same gtpu tunnel so counter
+ is not incremented per packet */
+ if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
+ {
+ stats_n_packets -= 1;
+ stats_n_bytes -= len0;
+ if (stats_n_packets)
+ vlib_increment_combined_counter (
+ im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
+ thread_index, stats_sw_if_index, stats_n_packets,
+ stats_n_bytes);
+ stats_n_packets = 1;
+ stats_n_bytes = len0;
+ stats_sw_if_index = sw_if_index0;
+ }
+
+trace0:
+ b0->error = error0 ? node->errors[error0] : 0;
+
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ gtpu_rx_trace_t *tr
+ = vlib_add_trace (vm, node, b0, sizeof (*tr));
+ tr->next_index = next0;
+ tr->error = error0;
+ tr->tunnel_index = tunnel_index0;
+ tr->teid = has_space0 ? clib_net_to_host_u32(gtpu0->teid) : ~0;
+ if (vlib_buffer_has_space (b0, 4))
+ {
+ tr->header.ver_flags = gtpu0->ver_flags;
+ tr->header.type = gtpu0->type;
+ tr->header.length = clib_net_to_host_u16 (gtpu0->length);
+ }
+ }
+
+ if (ip_err1 || udp_err1 || csum_err1)
+ {
+ next1 = GTPU_INPUT_NEXT_DROP;
+ error1 = gtpu_err_code (ip_err1, udp_err1, csum_err1);
+ goto trace1;
+ }
+
+ /*
+ * Manipulate gtpu header
+ * TBD: Manipulate Sequence Number and N-PDU Number
+ * TBD: Manipulate Next Extension Header
+ */
+ if (PREDICT_FALSE ((!is_fast_track1) | (!has_space1)))
+ {
+ /* Not fast path. ext1 and gtpu_hdr_len1 might be wrong */
+
+ /* GCC will hopefully fix the duplicate compute */
+ if (PREDICT_FALSE (
+ !((ver1 & (GTPU_VER_MASK | GTPU_PT_BIT | GTPU_RES_BIT)) ==
+ (GTPU_V1_VER | GTPU_PT_BIT)) |
+ (!has_space1)))
+ {
+ /* The header or size is wrong */
+ error1 =
+ has_space1 ? GTPU_ERROR_BAD_VER : GTPU_ERROR_TOO_SMALL;
+ next1 = GTPU_INPUT_NEXT_DROP;
+ goto trace1;
+ }
+ /* Correct version and has the space. It can only be unknown
+ * message type.
+ */
+ error1 = GTPU_ERROR_UNSUPPORTED_TYPE;
+ next1 = GTPU_INPUT_NEXT_DROP;
+
+ /* The packet is not forwarded */
+ goto trace1;
+ }
+
+ /* Manipulate packet 1 */
+ ASSERT (b1->flow_id != 0);
+ tunnel_index1 = b1->flow_id - gtm->flow_id_start;
+ t1 = pool_elt_at_index (gtm->tunnels, tunnel_index1);
+ b1->flow_id = 0;
+
+ /* Pop gtpu header */
+ vlib_buffer_advance (b1, gtpu_hdr_len1);
+
+ /* assign the next node */
+ if (PREDICT_FALSE (t1->decap_next_index !=
+ GTPU_INPUT_NEXT_IP4_INPUT) &&
+ (t1->decap_next_index != GTPU_INPUT_NEXT_IP6_INPUT))
+ {
+ error1 = GTPU_FLOW_ERROR_PAYLOAD_ERROR;
+ next1 = GTPU_INPUT_NEXT_DROP;
+ goto trace1;
+ }
+ next1 = t1->decap_next_index;
+
+ sw_if_index1 = t1->sw_if_index;
+
+ /* Required to make the l2 tag push / pop code work on l2 subifs */
+ /* This won't happen in current implementation as only
+ ipv4/udp/gtpu/IPV4 type packets can be matched */
+ if (PREDICT_FALSE (next1 == GTPU_INPUT_NEXT_L2_INPUT))
+ vnet_update_l2_len (b1);
+
+ /* Set packet input sw_if_index to unicast GTPU tunnel for learning
+ */
+ vnet_buffer (b1)->sw_if_index[VLIB_RX] = sw_if_index1;
+
+ pkts_decapsulated++;
+ stats_n_packets += 1;
+ stats_n_bytes += len1;
+
+ /* Batch stats increment on the same gtpu tunnel so counter
+ is not incremented per packet */
+ if (PREDICT_FALSE (sw_if_index1 != stats_sw_if_index))
+ {
+ stats_n_packets -= 1;
+ stats_n_bytes -= len1;
+ if (stats_n_packets)
+ vlib_increment_combined_counter (
+ im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
+ thread_index, stats_sw_if_index, stats_n_packets,
+ stats_n_bytes);
+ stats_n_packets = 1;
+ stats_n_bytes = len1;
+ stats_sw_if_index = sw_if_index1;
+ }
+
+trace1:
+ b1->error = error1 ? node->errors[error1] : 0;
+
+ if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ gtpu_rx_trace_t *tr
+ = vlib_add_trace (vm, node, b1, sizeof (*tr));
+ tr->next_index = next1;
+ tr->error = error1;
+ tr->tunnel_index = tunnel_index1;
+ tr->teid = has_space1 ? clib_net_to_host_u32(gtpu1->teid) : ~0;
+ if (vlib_buffer_has_space (b1, 4))
+ {
+ tr->header.ver_flags = gtpu1->ver_flags;
+ tr->header.type = gtpu1->type;
+ tr->header.length = clib_net_to_host_u16 (gtpu1->length);
+ }
+ }
+
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, bi1, next0,
+ next1);
+}
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t * b0;
+ u32 next0;
+ gtpu_header_t * gtpu0;
+ u32 gtpu_hdr_len0;
+ u32 error0;
+ u32 tunnel_index0;
+ gtpu_tunnel_t * t0;
+ u32 sw_if_index0, len0;
+ u8 has_space0 = 0;
+ u8 ver0;
+ gtpu_ext_header_t ext = { .type = 0, .len = 0, .pad = 0 };
+ gtpu_ext_header_t *ext0;
+ bool is_fast_track0;
+ ext0 = &ext;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ len0 = vlib_buffer_length_in_chain (vm, b0);
+
+ tunnel_index0 = ~0;
+ error0 = 0;
+
+ ip_err0 = gtpu_check_ip (b0, len0);
+ udp_err0 = gtpu_check_ip_udp_len (b0);
+ if (PREDICT_FALSE (gtpu_local_need_csum_check (b0)))
+ csum_err0 = !gtpu_validate_udp_csum (vm, b0);
+ else
+ csum_err0 = !gtpu_local_csum_is_valid (b0);
+
+ /* udp leaves current_data pointing at the gtpu header */
+ gtpu0 = vlib_buffer_get_current (b0);
+
+ /* speculatively load gtp header version field */
+ ver0 = gtpu0->ver_flags;
+
+ /*
+ * Manipulate gtpu header
+ * TBD: Manipulate Sequence Number and N-PDU Number
+ * TBD: Manipulate Next Extension Header
+ */
+ is_fast_track0 =
+ ((ver0 & (GTPU_VER_MASK | GTPU_PT_BIT | GTPU_RES_BIT)) ==
+ (GTPU_V1_VER | GTPU_PT_BIT));
+ is_fast_track0 = is_fast_track0 & (gtpu0->type == 255);
+
+ ext0 = (ver0 & GTPU_E_BIT) ?
+ (gtpu_ext_header_t *) >pu0->next_ext_type :
+ &ext;
+
+ gtpu_hdr_len0 = sizeof (gtpu_header_t) -
+ (((ver0 & GTPU_E_S_PN_BIT) == 0) * 4) +
+ ext0->len * 4;
+ ext0 += ext0->len * 4 / sizeof (*ext0);
+
+ has_space0 = vlib_buffer_has_space (b0, gtpu_hdr_len0);
+
+ if (ip_err0 || udp_err0 || csum_err0)
+ {
+ next0 = GTPU_INPUT_NEXT_DROP;
+ error0 = gtpu_err_code (ip_err0, udp_err0, csum_err0);
+ goto trace00;
+ }
+
+ if (PREDICT_FALSE ((!is_fast_track0) | (!has_space0)))
+ {
+ /* Not fast path. ext0 and gtpu_hdr_len0 might be wrong */
+
+ /* GCC will hopefully fix the duplicate compute */
+ if (PREDICT_FALSE (
+ !((ver0 & (GTPU_VER_MASK | GTPU_PT_BIT | GTPU_RES_BIT)) ==
+ (GTPU_V1_VER | GTPU_PT_BIT)) |
+ (!has_space0)))
+ {
+ /* The header or size is wrong */
+ error0 =
+ has_space0 ? GTPU_ERROR_BAD_VER : GTPU_ERROR_TOO_SMALL;
+ next0 = GTPU_INPUT_NEXT_DROP;
+ goto trace00;
+ }
+ /* Correct version and has the space. It can only be unknown
+ * message type.
+ */
+ error0 = GTPU_ERROR_UNSUPPORTED_TYPE;
+ next0 = GTPU_INPUT_NEXT_DROP;
+
+ /* The packet is not forwarded */
+ goto trace00;
+ }
+
+ ASSERT (b0->flow_id != 0);
+ tunnel_index0 = b0->flow_id - gtm->flow_id_start;
+ t0 = pool_elt_at_index (gtm->tunnels, tunnel_index0);
+ b0->flow_id = 0;
+
+ /* Pop gtpu header */
+ vlib_buffer_advance (b0, gtpu_hdr_len0);
+
+ /* assign the next node */
+ if (PREDICT_FALSE (t0->decap_next_index !=
+ GTPU_INPUT_NEXT_IP4_INPUT) &&
+ (t0->decap_next_index != GTPU_INPUT_NEXT_IP6_INPUT))
+ {
+ error0 = GTPU_FLOW_ERROR_PAYLOAD_ERROR;
+ next0 = GTPU_INPUT_NEXT_DROP;
+ goto trace00;
+ }
+ next0 = t0->decap_next_index;
+
+ sw_if_index0 = t0->sw_if_index;
+
+ /* Set packet input sw_if_index to unicast GTPU tunnel for learning
+ */
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index0;
+
+ pkts_decapsulated++;
+ stats_n_packets += 1;
+ stats_n_bytes += len0;
+
+ /* Batch stats increment on the same gtpu tunnel so counter
+ is not incremented per packet */
+ if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
+ {
+ stats_n_packets -= 1;
+ stats_n_bytes -= len0;
+ if (stats_n_packets)
+ vlib_increment_combined_counter (
+ im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
+ thread_index, stats_sw_if_index, stats_n_packets,
+ stats_n_bytes);
+ stats_n_packets = 1;
+ stats_n_bytes = len0;
+ stats_sw_if_index = sw_if_index0;
+ }
+ trace00:
+ b0->error = error0 ? node->errors[error0] : 0;
+
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ gtpu_rx_trace_t *tr
+ = vlib_add_trace (vm, node, b0, sizeof (*tr));
+ tr->next_index = next0;
+ tr->error = error0;
+ tr->tunnel_index = tunnel_index0;
+ tr->teid = has_space0 ? clib_net_to_host_u32(gtpu0->teid) : ~0;
+ if (vlib_buffer_has_space (b0, 4))
+ {
+ tr->header.ver_flags = gtpu0->ver_flags;
+ tr->header.type = gtpu0->type;
+ tr->header.length = clib_net_to_host_u16 (gtpu0->length);
+ }
+ }
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ /* Do we still need this now that tunnel tx stats is kept? */
+ vlib_node_increment_counter (vm, gtpu4_flow_input_node.index,
+ GTPU_ERROR_DECAPSULATED,
+ pkts_decapsulated);
+
+ /* Increment any remaining batch stats */
+ if (stats_n_packets)
+ {
+ vlib_increment_combined_counter
+ (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
+ thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
+ node->runtime_data[0] = stats_sw_if_index;
+ }
+
+ return from_frame->n_vectors;
+}
+
+VLIB_NODE_FN (gtpu4_flow_input_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return gtpu_flow_input(vm, node, from_frame);
+}
+
+
+/* *INDENT-OFF* */
+#ifndef CLIB_MULTIARCH_VARIANT
+VLIB_REGISTER_NODE (gtpu4_flow_input_node) = {
+ .name = "gtpu4-flow-input",
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .vector_size = sizeof (u32),
+
+ .format_trace = format_gtpu_rx_trace,
+
+ .n_errors = GTPU_FLOW_N_ERROR,
+ .error_strings = gtpu_flow_error_strings,
+
+ .n_next_nodes = GTPU_INPUT_N_NEXT,
+ .next_nodes = {
+#define _(s,n) [GTPU_INPUT_NEXT_##s] = n,
+ foreach_gtpu_input_next
+#undef _
+
+ },
+};
+#endif
+/* *INDENT-ON* */
+
+#endif /* CLIB_MARCH_VARIANT */
Code Review / vpp.git / blobdiff