diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/plugins/gtpu/gtpu.api | 196 | ||||
| -rw-r--r-- | src/plugins/gtpu/gtpu.c | 401 | ||||
| -rw-r--r-- | src/plugins/gtpu/gtpu.h | 108 | ||||
| -rw-r--r-- | src/plugins/gtpu/gtpu_api.c | 246 | ||||
| -rw-r--r-- | src/plugins/gtpu/gtpu_decap.c | 1541 | ||||
| -rw-r--r-- | src/plugins/gtpu/gtpu_encap.c | 218 | ||||
| -rw-r--r-- | src/plugins/gtpu/gtpu_error.def | 2 | ||||
| -rw-r--r-- | src/plugins/gtpu/gtpu_test.c | 366 |
8 files changed, 2551 insertions, 527 deletions
diff --git a/src/plugins/gtpu/gtpu.api b/src/plugins/gtpu/gtpu.api index ec4933af197..7c5c137a840 100644 --- a/src/plugins/gtpu/gtpu.api +++ b/src/plugins/gtpu/gtpu.api @@ -13,10 +13,34 @@ * limitations under the License. */ -option version = "2.0.1"; +option version = "2.1.0"; import "vnet/interface_types.api"; import "vnet/ip/ip_types.api"; +enum gtpu_forwarding_type +{ + GTPU_API_FORWARDING_NONE = 0, + GTPU_API_FORWARDING_BAD_HEADER = 1, + GTPU_API_FORWARDING_UNKNOWN_TEID = 2, + GTPU_API_FORWARDING_UNKNOWN_TYPE = 4, +}; + +enum gtpu_decap_next_type +{ + GTPU_API_DECAP_NEXT_DROP = 0, + GTPU_API_DECAP_NEXT_L2 = 1, + GTPU_API_DECAP_NEXT_IP4 = 2, + GTPU_API_DECAP_NEXT_IP6 = 3, +}; + +typedef sw_if_counters +{ + u64 packets_rx; + u64 packets_tx; + u64 bytes_rx; + u64 bytes_tx; +}; + /** \brief Create or delete a GTPU tunnel @param client_index - opaque cookie to identify the sender @param context - sender context, to match reply w/ request @@ -56,6 +80,53 @@ define gtpu_add_del_tunnel_reply vl_api_interface_index_t sw_if_index; }; +/** \brief Create or delete a GTPU tunnel + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param is_add - add address if non-zero, else delete + @param src_address - GTPU tunnel's source address. + @param dst_address - GTPU tunnel's destination address. + @param mcast_sw_if_index - version, O-bit and C-bit (see nsh_packet.h) + @param encap_vrf_id - fib identifier used for outgoing encapsulated packets + @param decap_next_index - the index of the next node if success + @param teid - Local (rx) Tunnel Endpoint Identifier + @param tteid - Remote (tx) Tunnel Endpoint Identifier + @param pdu_extension - add PDU session container extension to each packet + @param qfi - the QFI to set in the PDU session container, 6 bits only +*/ +define gtpu_add_del_tunnel_v2 +{ + u32 client_index; + u32 context; + bool is_add; + vl_api_address_t src_address; + vl_api_address_t dst_address; + vl_api_interface_index_t mcast_sw_if_index; + u32 encap_vrf_id; + vl_api_gtpu_decap_next_type_t decap_next_index; + u32 teid; + u32 tteid; + bool pdu_extension; + u8 qfi; + option vat_help = "src <ip-addr> {dst <ip-addr> | group <mcast-ip-addr> {<intfc> | mcast_sw_if_index <nn>}} teid <nn> [tteid <nn>] [encap-vrf-id <nn>] [decap-next <l2|nn>] [qfi <nn>] [del]"; + option in_progress; +}; + +/** \brief reply for set or delete an GTPU tunnel + @param context - sender context, to match reply w/ request + @param retval - return code + @param sw_if_index - software index of the interface + @param counters - Number of packets/bytes that is sent/received via this tunnel. Inaccurate (with in flight packets), sum for the entire set of per-thread counters. Zero for new tunnels. +*/ +define gtpu_add_del_tunnel_v2_reply +{ + u32 context; + i32 retval; + vl_api_interface_index_t sw_if_index; + vl_api_sw_if_counters_t counters; + option in_progress; +}; + /** \brief Update GTPU tunnel TX TEID @param client_index - opaque cookie to identify the sender @param context - sender context, to match reply w/ request @@ -112,6 +183,56 @@ define gtpu_tunnel_details u32 tteid; }; + +/** \brief Dump GTPU tunnel + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param sw_if_index - software index of the interface +*/ +define gtpu_tunnel_v2_dump +{ + u32 client_index; + u32 context; + vl_api_interface_index_t sw_if_index; + option vat_help = "[<intfc> | sw_if_index <nn>]"; + option in_progress; +}; + +/** \brief dump details of an GTPU tunnel + @param context - sender context, to match reply w/ request + @param sw_if_index - software index of the interface + @param src_address - GTPU tunnel's source address. + @param dst_address - GTPU tunnel's destination address. + @param mcast_sw_if_index - version, O-bit and C-bit (see nsh_packet.h) + @param encap_vrf_id - fib identifier used for outgoing encapsulated packets + @param decap_next_index - the index of the next node if success + @param teid - Local (rx) Tunnel Endpoint Identifier + @param tteid - Remote (tx) Tunnel Endpoint Identifier + @param pdu_extension - add PDU session container extension to each packet + @param qfi - the QFI to set in the PDU session container, 6 bits only + @param is_forwarding - tunnel used for forwarding packets + @param forwarding_type - the type of packets forwarded + @param counters - Number of packets/bytes that is sent/received via this tunnel. Inaccurate (with in flight packets), sum for the entire set of per-thread counters. +*/ +define gtpu_tunnel_v2_details +{ + u32 context; + vl_api_interface_index_t sw_if_index; + vl_api_address_t src_address; + vl_api_address_t dst_address; + vl_api_interface_index_t mcast_sw_if_index; + u32 encap_vrf_id; + vl_api_gtpu_decap_next_type_t decap_next_index; + u32 teid; + u32 tteid; + bool pdu_extension; + u8 qfi; + bool is_forwarding; + vl_api_gtpu_forwarding_type_t forwarding_type; + vl_api_sw_if_counters_t counters; + option in_progress; +}; + /** \brief Interface set gtpu-bypass request @param client_index - opaque cookie to identify the sender @param context - sender context, to match reply w/ request @@ -146,6 +267,79 @@ autoreply define gtpu_offload_rx option vat_help = "hw <intfc> rx <tunnel-name> [del]"; }; +/** \brief Set gtpu-forward request + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param is_add - add address if non-zero, else delete + @param forwarding_type - forward filter (unknown teid, unknown message type or unknown header) + @param dst_address - forward destination address. + @param encap_vrf_id - fib identifier used for outgoing packets + @param decap_next_index - the index of the next node if success +*/ +define gtpu_add_del_forward +{ + u32 client_index; + u32 context; + bool is_add; + vl_api_address_t dst_address; + vl_api_gtpu_forwarding_type_t forwarding_type; + u32 encap_vrf_id; + vl_api_gtpu_decap_next_type_t decap_next_index; + option vat_help = "dst <ip-addr> {bad-header|unknown-teid|unknown-type} [decap-next <l2|nn>] [del]"; + option in_progress; +}; + +/** \brief reply for set or delete GTPU forwarding + @param context - sender context, to match reply w/ request + @param retval - return code + @param sw_if_index - software index of the interface +*/ +define gtpu_add_del_forward_reply +{ + u32 context; + i32 retval; + vl_api_interface_index_t sw_if_index; + option in_progress; +}; + +/** \brief Get list of metrics, use for bulk transfer. + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param sw_if_index_start - software index of the first interface to return data on. + @param capacity - max number of interfaces returned. +*/ +define gtpu_get_transfer_counts +{ + u32 client_index; + u32 context; + vl_api_interface_index_t sw_if_index_start; + u32 capacity; + //option vat_help = "start_index <sw_if_index> count <nn>"; + option in_progress; +}; + +/** \brief reply for set or delete GTPU forwarding + @param context - sender context, to match reply w/ request + @param retval - return code + @param count - number of tunnel counters returned, sequential starting at sw_if_index_start. + @param tunnels - Number of packets/bytes that is sent/received via this tunnel. Inaccurate (with in flight packets), sum for the entire set of per-thread counters. +*/ +typedef tunnel_metrics +{ + vl_api_interface_index_t sw_if_index; + u32 reserved; + vl_api_sw_if_counters_t counters; +}; + +define gtpu_get_transfer_counts_reply +{ + u32 context; + i32 retval; + u32 count; + vl_api_tunnel_metrics_t tunnels[count]; + option in_progress; +}; + /* * Local Variables: * eval: (c-set-style "gnu") diff --git a/src/plugins/gtpu/gtpu.c b/src/plugins/gtpu/gtpu.c index d3a2f05dd18..1307794b9e5 100644 --- a/src/plugins/gtpu/gtpu.c +++ b/src/plugins/gtpu/gtpu.c @@ -56,8 +56,13 @@ u8 * format_gtpu_encap_trace (u8 * s, va_list * args) gtpu_encap_trace_t * t = va_arg (*args, gtpu_encap_trace_t *); - s = format (s, "GTPU encap to gtpu_tunnel%d tteid %d", - t->tunnel_index, t->tteid); + s = format (s, "GTPU encap to gtpu_tunnel%d tteid %u ", t->tunnel_index, + t->tteid); + + if (t->pdu_extension) + s = format (s, "pdu-extension qfi %d ", t->qfi); + else + s = format (s, "no-pdu-extension "); return s; } @@ -95,16 +100,37 @@ format_gtpu_tunnel (u8 * s, va_list * args) is_ipv6 ? im6->fibs[t->encap_fib_index].ft_table_id : im4->fibs[t->encap_fib_index].ft_table_id; - s = format (s, "[%d] src %U dst %U teid %d tteid %d " + s = format (s, + "[%d] src %U dst %U teid %u tteid %u " "encap-vrf-id %d sw-if-idx %d ", - t - ngm->tunnels, - format_ip46_address, &t->src, IP46_TYPE_ANY, - format_ip46_address, &t->dst, IP46_TYPE_ANY, - t->teid, t->tteid, encap_vrf_id, t->sw_if_index); + t - ngm->tunnels, format_ip46_address, &t->src, IP46_TYPE_ANY, + format_ip46_address, &t->dst, IP46_TYPE_ANY, t->teid, t->tteid, + encap_vrf_id, t->sw_if_index); s = format (s, "encap-dpo-idx %d ", t->next_dpo.dpoi_index); s = format (s, "decap-next-%U ", format_decap_next, t->decap_next_index); + if (t->is_forwarding) + { + 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; + } + return s; + } + if (t->pdu_extension != 0) + s = format (s, "pdu-enabled qfi %d ", t->qfi); + else + s = format (s, "pdu-disabled "); + if (PREDICT_FALSE (ip46_address_is_multicast (&t->dst))) s = format (s, "mcast-sw-if-idx %d ", t->mcast_sw_if_index); @@ -224,15 +250,18 @@ const static fib_node_vft_t gtpu_vft = { .fnv_back_walk = gtpu_tunnel_back_walk, }; - -#define foreach_copy_field \ -_(teid) \ -_(tteid) \ -_(mcast_sw_if_index) \ -_(encap_fib_index) \ -_(decap_next_index) \ -_(src) \ -_(dst) +#define foreach_copy_field \ + _ (teid) \ + _ (tteid) \ + _ (mcast_sw_if_index) \ + _ (encap_fib_index) \ + _ (decap_next_index) \ + _ (src) \ + _ (dst) \ + _ (pdu_extension) \ + _ (qfi) \ + _ (is_forwarding) \ + _ (forwarding_type) static void ip_udp_gtpu_rewrite (gtpu_tunnel_t * t, bool is_ip6) @@ -251,12 +280,15 @@ ip_udp_gtpu_rewrite (gtpu_tunnel_t * t, bool is_ip6) udp_header_t *udp; gtpu_header_t *gtpu; + gtpu_ext_with_pdu_session_header_t *gtpu_ext_pdu; + i64 length_adjustment = 0; /* Fixed portion of the (outer) ip header */ if (!is_ip6) { ip4_header_t *ip = &r.h4->ip4; udp = &r.h4->udp; gtpu = &r.h4->gtpu; + gtpu_ext_pdu = &r.h4->gtpu_ext; ip->ip_version_and_header_length = 0x45; ip->ttl = 254; ip->protocol = IP_PROTOCOL_UDP; @@ -272,6 +304,7 @@ ip_udp_gtpu_rewrite (gtpu_tunnel_t * t, bool is_ip6) ip6_header_t *ip = &r.h6->ip6; udp = &r.h6->udp; gtpu = &r.h6->gtpu; + gtpu_ext_pdu = &r.h6->gtpu_ext; ip->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (6 << 28); ip->hop_limit = 255; @@ -290,9 +323,27 @@ ip_udp_gtpu_rewrite (gtpu_tunnel_t * t, bool is_ip6) gtpu->type = GTPU_TYPE_GTPU; gtpu->teid = clib_host_to_net_u32 (t->tteid); + if (t->pdu_extension) + { + gtpu->ver_flags = GTPU_V1_VER | GTPU_PT_GTP | GTPU_E_BIT; + gtpu->next_ext_type = GTPU_EXT_HDR_PDU_SESSION_CONTAINER; + gtpu_ext_pdu->len = 1; + gtpu_ext_pdu->pdu.oct0 = GTPU_PDU_DL_SESSION_TYPE; + gtpu_ext_pdu->pdu.oct1 = t->qfi; + gtpu_ext_pdu->next_header = 0; + } + else + { + // Remove the size of the PDU session header and the optional fields + length_adjustment = -sizeof (gtpu_ext_with_pdu_session_header_t) - 4; + } + t->rewrite = r.rw; - /* Now only support 8-byte gtpu header. TBD */ - vec_set_len (t->rewrite, sizeof (ip4_gtpu_header_t) - 4); + /* Now only support 8-byte gtpu header or 12+4-byte header. TBD */ + if (!is_ip6) + vec_set_len (t->rewrite, sizeof (ip4_gtpu_header_t) + length_adjustment); + else + vec_set_len (t->rewrite, sizeof (ip6_gtpu_header_t) + length_adjustment); return; } @@ -349,6 +400,139 @@ mcast_shared_remove (ip46_address_t * dst) hash_unset_mem_free (>pu_main.mcast_shared, dst); } +int +vnet_gtpu_add_del_forwarding (vnet_gtpu_add_mod_del_tunnel_args_t *a, + u32 *sw_if_indexp) +{ + gtpu_main_t *gtm = >pu_main; + bool is_add; + u32 current_index_value, current_index_value_ipv6; + u32 address_tabel_ipv4; + ip6_address_t address_tabel_ipv6; + u32 sw_if_index = ~0; + bool is_ip6 = !ip46_address_is_ip4 (&a->dst); + int rv; + /* Check for errors */ + if (!a->is_forwarding) + { + return VNET_API_ERROR_INVALID_ARGUMENT; + } + + switch (a->opn) + { + case GTPU_ADD_TUNNEL: + is_add = 1; + break; + case GTPU_DEL_TUNNEL: + is_add = 0; + break; + default: + return VNET_API_ERROR_INVALID_ARGUMENT; + } + + /* Check if the operation is valid, and get the current state if it is. + * Handling multiple flags at once is not supported yet. */ + switch (a->forwarding_type) + { + case GTPU_FORWARD_BAD_HEADER: + current_index_value = gtm->bad_header_forward_tunnel_index_ipv4; + current_index_value_ipv6 = gtm->bad_header_forward_tunnel_index_ipv6; + address_tabel_ipv4 = GTPU_FORWARD_BAD_HEADER_ADDRESS_IPV4; + /* ipv6 is TBD */ + ip6_address_t address_tabel_ipv6_ = GTPU_FORWARD_BAD_HEADER_ADDRESS_IPV6; + address_tabel_ipv6 = address_tabel_ipv6_; + break; + case GTPU_FORWARD_UNKNOWN_TEID: + current_index_value = gtm->unknown_teid_forward_tunnel_index_ipv4; + current_index_value_ipv6 = gtm->unknown_teid_forward_tunnel_index_ipv6; + address_tabel_ipv4 = GTPU_FORWARD_UNKNOWN_TEID_ADDRESS_IPV4; + ip6_address_t address_tabel_ipv6__ = + GTPU_FORWARD_UNKNOWN_TEID_ADDRESS_IPV6; + address_tabel_ipv6 = address_tabel_ipv6__; + break; + case GTPU_FORWARD_UNKNOWN_TYPE: + current_index_value = gtm->unknown_type_forward_tunnel_index_ipv4; + current_index_value_ipv6 = gtm->unknown_type_forward_tunnel_index_ipv6; + address_tabel_ipv4 = GTPU_FORWARD_UNKNOWN_TYPE_ADDRESS_IPV4; + ip6_address_t address_tabel_ipv6___ = + GTPU_FORWARD_UNKNOWN_TYPE_ADDRESS_IPV6; + address_tabel_ipv6 = address_tabel_ipv6___; + break; + default: + return VNET_API_ERROR_INVALID_ARGUMENT; + } + + if (is_ip6) + current_index_value = current_index_value_ipv6; + + /* Check if the existing forwarding rule state conflicts with this operation + */ + if ((is_add) && (current_index_value != ~0)) + { + return VNET_API_ERROR_TUNNEL_EXIST; + } + if (!is_add) + { + if (current_index_value == ~0) + return VNET_API_ERROR_NO_SUCH_ENTRY; + /* Clear the tunnel index before deleting the tunnel itself */ + switch (a->forwarding_type) + { + case GTPU_FORWARD_BAD_HEADER: + gtm->bad_header_forward_tunnel_index_ipv4 = ~0; + break; + case GTPU_FORWARD_UNKNOWN_TEID: + gtm->unknown_teid_forward_tunnel_index_ipv4 = ~0; + break; + case GTPU_FORWARD_UNKNOWN_TYPE: + gtm->unknown_type_forward_tunnel_index_ipv4 = ~0; + break; + } + } + + /* src is the tunnel lookup key, so it is fixed. + * dst is used for the new target */ + a->src = a->dst; + if (is_ip6) + a->dst.ip6 = address_tabel_ipv6; + else + a->dst.ip4.as_u32 = address_tabel_ipv4; + rv = vnet_gtpu_add_mod_del_tunnel (a, &sw_if_index); + + // Forward only if not nil + if (sw_if_indexp) + *sw_if_indexp = sw_if_index; + + if (rv != 0) + return rv; + + /* Update the forwarding tunnel index */ + u32 tunnel_index = is_add ? vnet_gtpu_get_tunnel_index (sw_if_index) : ~0; + switch (a->forwarding_type) + { + case GTPU_FORWARD_BAD_HEADER: + if (is_ip6) + gtm->bad_header_forward_tunnel_index_ipv6 = tunnel_index; + else + gtm->bad_header_forward_tunnel_index_ipv4 = tunnel_index; + + break; + case GTPU_FORWARD_UNKNOWN_TEID: + if (is_ip6) + gtm->unknown_teid_forward_tunnel_index_ipv6 = tunnel_index; + else + gtm->unknown_teid_forward_tunnel_index_ipv4 = tunnel_index; + break; + case GTPU_FORWARD_UNKNOWN_TYPE: + if (is_ip6) + gtm->unknown_type_forward_tunnel_index_ipv6 = tunnel_index; + else + gtm->unknown_type_forward_tunnel_index_ipv4 = tunnel_index; + break; + } + return 0; +} + int vnet_gtpu_add_mod_del_tunnel (vnet_gtpu_add_mod_del_tunnel_args_t * a, u32 * sw_if_indexp) { @@ -635,6 +819,22 @@ int vnet_gtpu_add_mod_del_tunnel return 0; } +int +get_combined_counters (u32 sw_if_index, vlib_counter_t *result_rx, + vlib_counter_t *result_tx) +{ + gtpu_main_t *gtm = >pu_main; + vnet_main_t *vnm = gtm->vnet_main; + vnet_interface_main_t *im = &vnm->interface_main; + vlib_get_combined_counter (im->combined_sw_if_counters + + VNET_INTERFACE_COUNTER_RX, + sw_if_index, result_rx); + vlib_get_combined_counter (im->combined_sw_if_counters + + VNET_INTERFACE_COUNTER_TX, + sw_if_index, result_tx); + return 0; +} + static uword get_decap_next_for_node (u32 node_index, u32 ipv4_set) { @@ -690,6 +890,11 @@ gtpu_add_del_tunnel_command_fn (vlib_main_t * vm, u32 decap_next_index = GTPU_INPUT_NEXT_L2_INPUT; u32 teid = 0, tteid = 0; u32 tmp; + /* PDU is disabled by default */ + u8 pdu_extension = 0; + u32 qfi = ~0; + u8 is_forwarding = 0; + u8 forwarding_type = 0; int rv; vnet_gtpu_add_mod_del_tunnel_args_t _a, *a = &_a; u32 tunnel_sw_if_index; @@ -768,6 +973,8 @@ gtpu_add_del_tunnel_command_fn (vlib_main_t * vm, ; else if (unformat (line_input, "upd-tteid %d", &tteid)) opn = GTPU_UPD_TTEID; + else if (unformat (line_input, "qfi %d", &qfi)) + pdu_extension = 1; else { error = clib_error_return (0, "parse error: '%U'", @@ -829,7 +1036,11 @@ gtpu_add_del_tunnel_command_fn (vlib_main_t * vm, error = clib_error_return (0, "next node not found"); goto done; } - + if (pdu_extension == 1 && qfi > 31) + { + error = clib_error_return (0, "qfi max value is 31"); + goto done; + } clib_memset (a, 0, sizeof (*a)); a->opn = opn; @@ -899,10 +1110,10 @@ done: VLIB_CLI_COMMAND (create_gtpu_tunnel_command, static) = { .path = "create gtpu tunnel", .short_help = - "create gtpu tunnel src <local-tep-addr>" - " {dst <remote-tep-addr>|group <mcast-addr> <intf-name>}" - " teid <nn> [tteid <nn>] [encap-vrf-id <nn>]" - " [decap-next [l2|ip4|ip6|node <name>]] [del | upd-tteid <nn>]", + "create gtpu tunnel src <local-tep-addr>" + " {dst <remote-tep-addr>|group <mcast-addr> <intf-name>}" + " teid <nn> [tteid <nn>] [encap-vrf-id <nn>]" + " [decap-next [l2|ip4|ip6|node <name>]] [qfi <nn>] [del | upd-tteid <nn>]", .function = gtpu_add_del_tunnel_command_fn, }; /* *INDENT-ON* */ @@ -932,7 +1143,8 @@ show_gtpu_tunnel_command_fn (vlib_main_t * vm, * @cliexpar * Example of how to display the GTPU Tunnel entries: * @cliexstart{show gtpu tunnel} - * [0] src 10.0.3.1 dst 10.0.3.3 teid 13 tx-teid 55 encap_fib_index 0 sw_if_index 5 decap_next l2 + * [0] src 10.0.3.1 dst 10.0.3.3 teid 13 tx-teid 55 encap_fib_index 0 + sw_if_index 5 decap_next l2 pdu-disabled * @cliexend ?*/ /* *INDENT-OFF* */ @@ -1242,6 +1454,139 @@ VLIB_CLI_COMMAND (gtpu_offload_command, static) = { }; /* *INDENT-ON* */ +static clib_error_t * +gtpu_forward_command_fn (vlib_main_t *vm, unformat_input_t *input, + vlib_cli_command_t *cmd) +{ + unformat_input_t _line_input, *line_input = &_line_input; + + /* Get a line of input. */ + if (!unformat_user (input, unformat_line_input, line_input)) + return 0; + + u32 tunnel_sw_if_index; + clib_error_t *error = NULL; + + u32 decap_next_index = GTPU_INPUT_NEXT_L2_INPUT; + + int is_add = 1; + u8 dst_set = 0; + u8 ipv4_set = 0; + u8 ipv6_set = 0; + ip46_address_t src, dst; + u32 encap_fib_index = 0; + u32 mcast_sw_if_index = ~0; + u32 teid = 0, tteid = 0; + u32 tmp; + /* PDU is disabled by default */ + u8 pdu_extension = 0; + u32 qfi = ~0; + u8 is_forwarding = 1; + u8 forwarding_type = 0; + int rv; + vnet_gtpu_add_mod_del_tunnel_args_t _a, *a = &_a; + + /* Cant "universally zero init" (={0}) due to GCC bug 53119 */ + clib_memset (&src, 0, sizeof src); + clib_memset (&dst, 0, sizeof dst); + + while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (line_input, "dst %U", unformat_ip4_address, &dst.ip4)) + { + dst_set = 1; + ipv4_set = 1; + } + else if (unformat (line_input, "dst %U", unformat_ip6_address, &dst.ip6)) + { + dst_set = 1; + ipv6_set = 1; + } + else if (unformat (line_input, "decap-next %U", unformat_decap_next, + &decap_next_index, ipv4_set)) + ; + else if (unformat (line_input, "encap-vrf-id %d", &tmp)) + { + encap_fib_index = fib_table_find (fib_ip_proto (ipv6_set), tmp); + if (encap_fib_index == ~0) + { + error = + clib_error_return (0, "nonexistent encap-vrf-id %d", tmp); + goto done; + } + } + else if (unformat (line_input, "del")) + is_add = 0; + else if (unformat (line_input, "bad-header")) + forwarding_type |= GTPU_FORWARD_BAD_HEADER; + else if (unformat (line_input, "unknown-teid")) + forwarding_type |= GTPU_FORWARD_UNKNOWN_TEID; + else if (unformat (line_input, "unknown-type")) + forwarding_type |= GTPU_FORWARD_UNKNOWN_TYPE; + else + { + error = clib_error_return (0, "unknown input `%U'", + format_unformat_error, line_input); + goto done; + } + } + + if (!dst_set) + { + error = clib_error_return (0, "dst must be set to a valid IP address"); + goto done; + } + + a->opn = is_add ? GTPU_ADD_TUNNEL : GTPU_DEL_TUNNEL; +#define _(x) a->x = x; + foreach_copy_field; +#undef _ + + rv = vnet_gtpu_add_del_forwarding (a, &tunnel_sw_if_index); + + switch (rv) + { + case 0: + if (is_add) + vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, + vnet_get_main (), tunnel_sw_if_index); + break; + + case VNET_API_ERROR_TUNNEL_EXIST: + error = clib_error_return (0, "tunnel already exists..."); + goto done; + + case VNET_API_ERROR_NO_SUCH_ENTRY: + error = clib_error_return (0, "tunnel does not exist..."); + goto done; + + case VNET_API_ERROR_INVALID_ARGUMENT: + error = + clib_error_return (0, "one and only one of unknown-teid, unknown-type " + "or bad-header must be specified"); + goto done; + + default: + error = + clib_error_return (0, "vnet_gtpu_add_del_tunnel returned %d", rv); + goto done; + } + +done: + unformat_free (line_input); + + return error; +} + +VLIB_CLI_COMMAND (gtpu_forward_command, static) = { + .path = "create gtpu forward", + .short_help = + "create gtpu forward dst <local-tep-addr> " + "{unknown-teid|unknown-type|bad-header} " + "[decap-next [l2|ip4|ip6|node <name>]] [encap-vrf-id <nn>] [del]", + .function = gtpu_forward_command_fn, +}; + clib_error_t * gtpu_init (vlib_main_t * vm) { @@ -1264,6 +1609,14 @@ gtpu_init (vlib_main_t * vm) gtm->fib_node_type = fib_node_register_new_type ("gtpu", >pu_vft); + /* Clear forward tunnels */ + gtm->bad_header_forward_tunnel_index_ipv4 = ~0; + gtm->unknown_teid_forward_tunnel_index_ipv4 = ~0; + gtm->unknown_type_forward_tunnel_index_ipv4 = ~0; + gtm->bad_header_forward_tunnel_index_ipv6 = ~0; + gtm->unknown_teid_forward_tunnel_index_ipv6 = ~0; + gtm->unknown_type_forward_tunnel_index_ipv6 = ~0; + return 0; } diff --git a/src/plugins/gtpu/gtpu.h b/src/plugins/gtpu/gtpu.h index 72d09232001..0c224ebbfe3 100644 --- a/src/plugins/gtpu/gtpu.h +++ b/src/plugins/gtpu/gtpu.h @@ -53,21 +53,56 @@ * 12 Next Extension Header Type3) 4) **/ -typedef struct -{ +typedef CLIB_PACKED (struct { u8 ver_flags; u8 type; u16 length; /* length in octets of the data following the fixed part of the header */ u32 teid; + /* The following fields exists if and only if one or more of E, S or PN + * are 1. */ u16 sequence; u8 pdu_number; u8 next_ext_type; -} gtpu_header_t; +}) gtpu_header_t; -#define GTPU_V1_HDR_LEN 8 +typedef CLIB_PACKED (struct { + u8 type; + u8 len; + u16 pad; +}) gtpu_ext_header_t; + +/** + * DL PDU SESSION INFORMATION (PDU Type 0): + * (3GPP TS 38.415) + * Bits + * Octets 8 7 6 5 4 3 2 1 + * 1 type qmp snp spare + * 2 ppp rqi qos_fi + * + * UL PDU SESSION INFORMATION (PDU Type 1): + * Bits + * Octets 8 7 6 5 4 3 2 1 + * 1 type qmp DL d. UL d. snp + * 2 n3/n9 delay new IE qos_fi + **/ +typedef CLIB_PACKED (struct { + u8 oct0; + u8 oct1; + // Extensions are supported +}) pdu_session_container_t; + +STATIC_ASSERT_SIZEOF (pdu_session_container_t, 2); +typedef CLIB_PACKED (struct { + u8 len; + pdu_session_container_t pdu; + u8 next_header; +}) gtpu_ext_with_pdu_session_header_t; + +#define GTPU_V1_HDR_LEN 8 #define GTPU_VER_MASK (7<<5) #define GTPU_PT_BIT (1<<4) +#define GTPU_RES_BIT (1 << 3) #define GTPU_E_BIT (1<<2) #define GTPU_S_BIT (1<<1) #define GTPU_PN_BIT (1<<0) @@ -78,12 +113,42 @@ typedef struct #define GTPU_PT_GTP (1<<4) #define GTPU_TYPE_GTPU 255 +#define GTPU_EXT_HDR_PDU_SESSION_CONTAINER 133 +#define GTPU_NO_MORE_EXT_HDR 0 +#define GTPU_PDU_DL_SESSION_TYPE 0 +#define GTPU_PDU_UL_SESSION_TYPE (1 << 4) + +#define GTPU_FORWARD_BAD_HEADER (1 << 0) +#define GTPU_FORWARD_UNKNOWN_TEID (1 << 1) +#define GTPU_FORWARD_UNKNOWN_TYPE (1 << 2) + +/* the ipv4 addresses used for the forwarding tunnels. 127.0.0.127 - .129. */ +#define GTPU_FORWARD_BAD_HEADER_ADDRESS_IPV4 0x7f00007fu +#define GTPU_FORWARD_UNKNOWN_TEID_ADDRESS_IPV4 0x8000007fu +#define GTPU_FORWARD_UNKNOWN_TYPE_ADDRESS_IPV4 0x8100007fu + +/* the ipv6 addresses used for the forwarding tunnels. + * 2001:db8:ffff:ffff:ffff:ffff:ffff:fffd - + * 2001:db8:ffff:ffff:ffff:ffff:ffff:ffff*/ +#define GTPU_FORWARD_BAD_HEADER_ADDRESS_IPV6 \ + { \ + .as_u64[0] = 0xffffffffb80d0120ull, .as_u64[1] = 0xfdffffffffffffffull \ + } +#define GTPU_FORWARD_UNKNOWN_TEID_ADDRESS_IPV6 \ + { \ + .as_u64[0] = 0xffffffffb80d0120ull, .as_u64[1] = 0xfeffffffffffffffull \ + } +#define GTPU_FORWARD_UNKNOWN_TYPE_ADDRESS_IPV6 \ + { \ + .as_u64[0] = 0xffffffffb80d0120ull, .as_u64[1] = 0xffffffffffffffffull \ + } /* *INDENT-OFF* */ typedef CLIB_PACKED(struct { ip4_header_t ip4; /* 20 bytes */ udp_header_t udp; /* 8 bytes */ gtpu_header_t gtpu; /* 12 bytes */ + gtpu_ext_with_pdu_session_header_t gtpu_ext; /* 4 bytes */ }) ip4_gtpu_header_t; /* *INDENT-ON* */ @@ -92,7 +157,8 @@ typedef CLIB_PACKED(struct { ip6_header_t ip6; /* 40 bytes */ udp_header_t udp; /* 8 bytes */ - gtpu_header_t gtpu; /* 8 bytes */ + gtpu_header_t gtpu; /* 12 bytes */ + gtpu_ext_with_pdu_session_header_t gtpu_ext; /* 4 bytes */ }) ip6_gtpu_header_t; /* *INDENT-ON* */ @@ -157,6 +223,14 @@ typedef struct u32 sw_if_index; u32 hw_if_index; + /* PDU session container extension enable/disable */ + u8 pdu_extension; + u8 qfi; + + /* The tunnel is used for forwarding */ + u8 is_forwarding; + u8 forwarding_type; + /** * Linkage into the FIB object graph */ @@ -232,6 +306,19 @@ typedef struct /* API message ID base */ u16 msg_id_base; + /* Handle GTP packets of unknown type like echo and error indication, + * unknown teid or bad version/header. + * All packets will be forwarded to a new IP address, + * so that they can be processes outside vpp. + * If not set then packets are dropped. + * One of more indexes can be unused (~0). */ + u32 bad_header_forward_tunnel_index_ipv4; + u32 unknown_teid_forward_tunnel_index_ipv4; + u32 unknown_type_forward_tunnel_index_ipv4; + u32 bad_header_forward_tunnel_index_ipv6; + u32 unknown_teid_forward_tunnel_index_ipv6; + u32 unknown_type_forward_tunnel_index_ipv6; + /* convenience */ vlib_main_t *vlib_main; vnet_main_t *vnet_main; @@ -263,8 +350,15 @@ typedef struct u32 decap_next_index; u32 teid; /* local or rx teid */ u32 tteid; /* remote or tx teid */ + u8 pdu_extension; + u8 qfi; + u8 is_forwarding; + u8 forwarding_type; } vnet_gtpu_add_mod_del_tunnel_args_t; +int vnet_gtpu_add_del_forwarding (vnet_gtpu_add_mod_del_tunnel_args_t *a, + u32 *sw_if_indexp); + int vnet_gtpu_add_mod_del_tunnel (vnet_gtpu_add_mod_del_tunnel_args_t * a, u32 * sw_if_indexp); @@ -272,11 +366,15 @@ typedef struct { u32 tunnel_index; u32 tteid; + u8 pdu_extension; + u8 qfi; } gtpu_encap_trace_t; void vnet_int_gtpu_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable); u32 vnet_gtpu_get_tunnel_index (u32 sw_if_index); int vnet_gtpu_add_del_rx_flow (u32 hw_if_index, u32 t_imdex, int is_add); +int get_combined_counters (u32 sw_if_index, vlib_counter_t *result_rx, + vlib_counter_t *result_tx); #endif /* included_vnet_gtpu_h */ diff --git a/src/plugins/gtpu/gtpu_api.c b/src/plugins/gtpu/gtpu_api.c index 77432bae4fa..1cc9fab6cd2 100644 --- a/src/plugins/gtpu/gtpu_api.c +++ b/src/plugins/gtpu/gtpu_api.c @@ -124,6 +124,10 @@ static void vl_api_gtpu_add_del_tunnel_t_handler .decap_next_index = ntohl (mp->decap_next_index), .teid = ntohl (mp->teid), .tteid = ntohl (mp->tteid), + .pdu_extension = 0, + .qfi = 0, + .is_forwarding = 0, + .forwarding_type = 0, }; ip_address_decode (&mp->dst_address, &a.dst); ip_address_decode (&mp->src_address, &a.src); @@ -154,12 +158,70 @@ static void vl_api_gtpu_add_del_tunnel_t_handler rv = vnet_gtpu_add_mod_del_tunnel (&a, &sw_if_index); out: - /* *INDENT-OFF* */ REPLY_MACRO2(VL_API_GTPU_ADD_DEL_TUNNEL_REPLY, ({ rmp->sw_if_index = ntohl (sw_if_index); })); - /* *INDENT-ON* */ +} + +static void +vl_api_gtpu_add_del_tunnel_v2_t_handler (vl_api_gtpu_add_del_tunnel_v2_t *mp) +{ + vl_api_gtpu_add_del_tunnel_v2_reply_t *rmp; + int rv = 0; + vlib_counter_t result_rx; + vlib_counter_t result_tx; + gtpu_main_t *gtm = >pu_main; + + vnet_gtpu_add_mod_del_tunnel_args_t a = { + .opn = mp->is_add ? GTPU_ADD_TUNNEL : GTPU_DEL_TUNNEL, + .mcast_sw_if_index = ntohl (mp->mcast_sw_if_index), + .decap_next_index = ntohl (mp->decap_next_index), + .teid = ntohl (mp->teid), + .tteid = ntohl (mp->tteid), + .pdu_extension = mp->pdu_extension ? 1 : 0, + .qfi = mp->qfi, + .is_forwarding = 0, + .forwarding_type = 0, + }; + ip_address_decode (&mp->dst_address, &a.dst); + ip_address_decode (&mp->src_address, &a.src); + + u8 is_ipv6 = !ip46_address_is_ip4 (&a.dst); + a.encap_fib_index = + fib_table_find (fib_ip_proto (is_ipv6), ntohl (mp->encap_vrf_id)); + if (a.encap_fib_index == ~0) + { + rv = VNET_API_ERROR_NO_SUCH_FIB; + goto out; + } + + /* Check src & dst are different */ + if (ip46_address_cmp (&a.dst, &a.src) == 0) + { + rv = VNET_API_ERROR_SAME_SRC_DST; + goto out; + } + if (ip46_address_is_multicast (&a.dst) && + !vnet_sw_if_index_is_api_valid (a.mcast_sw_if_index)) + { + rv = VNET_API_ERROR_INVALID_SW_IF_INDEX; + goto out; + } + + u32 sw_if_index = ~0; + rv = vnet_gtpu_add_mod_del_tunnel (&a, &sw_if_index); + get_combined_counters (sw_if_index, &result_rx, &result_tx); + +out: + REPLY_MACRO2 ( + VL_API_GTPU_ADD_DEL_TUNNEL_V2_REPLY, ({ + rmp->sw_if_index = ntohl (sw_if_index); + rmp->counters.packets_rx = clib_net_to_host_u64 (result_rx.packets); + rmp->counters.packets_tx = clib_net_to_host_u64 (result_tx.packets); + rmp->counters.bytes_rx = clib_net_to_host_u64 (result_rx.bytes); + rmp->counters.bytes_tx = clib_net_to_host_u64 (result_tx.bytes); + })); } static void vl_api_gtpu_tunnel_update_tteid_t_handler @@ -242,7 +304,7 @@ vl_api_gtpu_tunnel_dump_t_handler (vl_api_gtpu_tunnel_dump_t * mp) pool_foreach (t, gtm->tunnels) { send_gtpu_tunnel_details(t, reg, mp->context); - } + } /* *INDENT-ON* */ } else @@ -257,6 +319,184 @@ vl_api_gtpu_tunnel_dump_t_handler (vl_api_gtpu_tunnel_dump_t * mp) } } +static void +send_gtpu_tunnel_details_v2 (gtpu_tunnel_t *t, vl_api_registration_t *reg, + u32 context) +{ + vl_api_gtpu_tunnel_v2_details_t *rmp; + vlib_counter_t result_rx; + vlib_counter_t result_tx; + gtpu_main_t *gtm = >pu_main; + ip4_main_t *im4 = &ip4_main; + ip6_main_t *im6 = &ip6_main; + u8 is_ipv6 = !ip46_address_is_ip4 (&t->dst); + + rmp = vl_msg_api_alloc (sizeof (*rmp)); + clib_memset (rmp, 0, sizeof (*rmp)); + rmp->_vl_msg_id = ntohs (VL_API_GTPU_TUNNEL_V2_DETAILS + gtm->msg_id_base); + + ip_address_encode (&t->src, is_ipv6 ? IP46_TYPE_IP6 : IP46_TYPE_IP4, + &rmp->src_address); + ip_address_encode (&t->dst, is_ipv6 ? IP46_TYPE_IP6 : IP46_TYPE_IP4, + &rmp->dst_address); + + rmp->encap_vrf_id = is_ipv6 ? + htonl (im6->fibs[t->encap_fib_index].ft_table_id) : + htonl (im4->fibs[t->encap_fib_index].ft_table_id); + rmp->mcast_sw_if_index = htonl (t->mcast_sw_if_index); + rmp->teid = htonl (t->teid); + rmp->tteid = htonl (t->tteid); + rmp->decap_next_index = htonl (t->decap_next_index); + rmp->sw_if_index = htonl (t->sw_if_index); + rmp->context = context; + rmp->pdu_extension = t->pdu_extension; + rmp->qfi = t->qfi; + rmp->is_forwarding = t->is_forwarding; + rmp->forwarding_type = htonl (t->forwarding_type); + + get_combined_counters (t->sw_if_index, &result_rx, &result_tx); + rmp->counters.packets_rx = clib_net_to_host_u64 (result_rx.packets); + rmp->counters.packets_tx = clib_net_to_host_u64 (result_tx.packets); + rmp->counters.bytes_rx = clib_net_to_host_u64 (result_rx.bytes); + rmp->counters.bytes_tx = clib_net_to_host_u64 (result_tx.bytes); + + vl_api_send_msg (reg, (u8 *) rmp); +} + +static void +vl_api_gtpu_tunnel_v2_dump_t_handler (vl_api_gtpu_tunnel_v2_dump_t *mp) +{ + vl_api_registration_t *reg; + gtpu_main_t *gtm = >pu_main; + gtpu_tunnel_t *t; + u32 sw_if_index; + + reg = vl_api_client_index_to_registration (mp->client_index); + if (!reg) + return; + + sw_if_index = ntohl (mp->sw_if_index); + + if (~0 == sw_if_index) + { + pool_foreach (t, gtm->tunnels) + { + send_gtpu_tunnel_details_v2 (t, reg, mp->context); + } + } + else + { + if ((sw_if_index >= vec_len (gtm->tunnel_index_by_sw_if_index)) || + (~0 == gtm->tunnel_index_by_sw_if_index[sw_if_index])) + { + return; + } + t = >m->tunnels[gtm->tunnel_index_by_sw_if_index[sw_if_index]]; + send_gtpu_tunnel_details_v2 (t, reg, mp->context); + } +} + +static void +vl_api_gtpu_add_del_forward_t_handler (vl_api_gtpu_add_del_forward_t *mp) +{ + vl_api_gtpu_add_del_forward_reply_t *rmp; + int rv = 0; + gtpu_main_t *gtm = >pu_main; + + vnet_gtpu_add_mod_del_tunnel_args_t a = { + .opn = mp->is_add ? GTPU_ADD_TUNNEL : GTPU_DEL_TUNNEL, + .mcast_sw_if_index = 0, + .decap_next_index = ntohl (mp->decap_next_index), + .teid = 0, + .tteid = 0, + .pdu_extension = 0, + .qfi = 0, + .is_forwarding = 1, + .forwarding_type = ntohl (mp->forwarding_type), + }; + ip_address_decode (&mp->dst_address, &a.dst); + /* Will be overwritten later */ + ip_address_decode (&mp->dst_address, &a.src); + + u8 is_ipv6 = !ip46_address_is_ip4 (&a.dst); + a.encap_fib_index = + fib_table_find (fib_ip_proto (is_ipv6), ntohl (mp->encap_vrf_id)); + + if (a.encap_fib_index == ~0) + { + rv = VNET_API_ERROR_NO_SUCH_FIB; + goto out; + } + + if (ip46_address_is_multicast (&a.dst) && + !vnet_sw_if_index_is_api_valid (a.mcast_sw_if_index)) + { + rv = VNET_API_ERROR_INVALID_SW_IF_INDEX; + goto out; + } + + u32 sw_if_index = ~0; + rv = vnet_gtpu_add_del_forwarding (&a, &sw_if_index); + +out: + REPLY_MACRO2 (VL_API_GTPU_ADD_DEL_FORWARD_REPLY, + ({ rmp->sw_if_index = ntohl (sw_if_index); })); +} + +static void +vl_api_gtpu_get_transfer_counts_t_handler ( + vl_api_gtpu_get_transfer_counts_t *mp) +{ + vl_api_gtpu_get_transfer_counts_reply_t *rmp; + int rv = 0; + vlib_counter_t result_rx; + vlib_counter_t result_tx; + gtpu_main_t *gtm = >pu_main; + u32 count = 0; + u32 sw_if_index; + u32 capacity = ntohl (mp->capacity); + u32 sw_if_index_start = ntohl (mp->sw_if_index_start); + int extra_size = sizeof (rmp->tunnels[0]) * capacity; + + if (sw_if_index_start >= vec_len (gtm->tunnel_index_by_sw_if_index)) + { + capacity = 0; + extra_size = 0; + } + sw_if_index = sw_if_index_start; + + REPLY_MACRO4 ( + VL_API_GTPU_GET_TRANSFER_COUNTS_REPLY, extra_size, ({ + for (; count < capacity; sw_if_index++) + { + if (sw_if_index >= vec_len (gtm->tunnel_index_by_sw_if_index)) + { + // No more tunnels + break; + } + if (~0 == gtm->tunnel_index_by_sw_if_index[sw_if_index]) + { + // Skip inactive/deleted tunnel + continue; + } + rmp->tunnels[count].sw_if_index = htonl (sw_if_index); + rmp->tunnels[count].reserved = 0; + + get_combined_counters (sw_if_index, &result_rx, &result_tx); + rmp->tunnels[count].counters.packets_rx = + clib_net_to_host_u64 (result_rx.packets); + rmp->tunnels[count].counters.packets_tx = + clib_net_to_host_u64 (result_tx.packets); + rmp->tunnels[count].counters.bytes_rx = + clib_net_to_host_u64 (result_rx.bytes); + rmp->tunnels[count].counters.bytes_tx = + clib_net_to_host_u64 (result_tx.bytes); + count++; + } + rmp->count = htonl (count); + })); +} + #include <gtpu/gtpu.api.c> static clib_error_t * gtpu_api_hookup (vlib_main_t * vm) diff --git a/src/plugins/gtpu/gtpu_decap.c b/src/plugins/gtpu/gtpu_decap.c index 40243dbcc53..21e38297ccf 100644 --- a/src/plugins/gtpu/gtpu_decap.c +++ b/src/plugins/gtpu/gtpu_decap.c @@ -26,6 +26,8 @@ typedef struct { 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) @@ -36,14 +38,29 @@ 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; } @@ -53,6 +70,7 @@ validate_gtpu_fib (vlib_buffer_t *b, gtpu_tunnel_t *t, u32 is_ip4) 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, @@ -75,28 +93,41 @@ gtpu_input (vlib_main_t * vm, 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, gtpu_hdr_len1; + // 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; @@ -106,11 +137,19 @@ gtpu_input (vlib_main_t * vm, 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]); @@ -121,57 +160,172 @@ gtpu_input (vlib_main_t * vm, 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) - { - 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)); - } + // 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_index0 = ~0; + error0 = 0; - tunnel_index1 = ~0; - error1 = 0; + tunnel_index1 = ~0; + error1 = 0; - /* speculatively load gtp header version field */ - ver0 = gtpu0->ver_flags; - ver1 = gtpu1->ver_flags; + /* 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 */ - gtpu_hdr_len0 = sizeof(gtpu_header_t) - (((ver0 & GTPU_E_S_PN_BIT) == 0) * 4); - gtpu_hdr_len1 = sizeof(gtpu_header_t) - (((ver1 & GTPU_E_S_PN_BIT) == 0) * 4); - - has_space0 = vlib_buffer_has_space (b0, gtpu_hdr_len0); - has_space1 = vlib_buffer_has_space (b1, gtpu_hdr_len1); - if (PREDICT_FALSE (((ver0 & GTPU_VER_MASK) != GTPU_V1_VER) | (!has_space0))) + /* 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))) { - error0 = has_space0 ? GTPU_ERROR_BAD_VER : GTPU_ERROR_TOO_SMALL; + /* 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 (PREDICT_FALSE (tunnel_index0 != ~0)) + goto forward0; + + 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; + + /* 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 (tunnel_index0 != ~0)) + goto forward0; + + /* The packet is ipv6/not forwarded */ goto trace0; } @@ -180,22 +334,31 @@ gtpu_input (vlib_main_t * vm, 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 */ @@ -203,10 +366,13 @@ gtpu_input (vlib_main_t * vm, { 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))) @@ -223,6 +389,9 @@ gtpu_input (vlib_main_t * vm, } 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 */ { @@ -239,13 +408,19 @@ gtpu_input (vlib_main_t * vm, { error0 = GTPU_ERROR_NO_SUCH_TUNNEL; next0 = GTPU_INPUT_NEXT_DROP; - 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; + /* 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 */ @@ -253,6 +428,9 @@ gtpu_input (vlib_main_t * vm, { 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; } @@ -274,28 +452,85 @@ gtpu_input (vlib_main_t * vm, } 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); + + /* Validate GTPU tunnel encap-fib index against packet */ + if (PREDICT_FALSE (validate_gtpu_fib (b0, t0, is_ip4) == 0)) + { + error0 = GTPU_ERROR_NO_ERROR_TUNNEL; + next0 = GTPU_INPUT_NEXT_DROP; + goto trace0; + } + + /* Clear the error, next0 will be overwritten by the tunnel */ + error0 = 0; + + 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 + { + /* 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; + } next0: - /* Pop gtpu header */ + /* 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 */ @@ -324,12 +559,61 @@ gtpu_input (vlib_main_t * vm, tr->error = error0; tr->tunnel_index = tunnel_index0; tr->teid = has_space0 ? clib_net_to_host_u32(gtpu0->teid) : ~0; - } - if (PREDICT_FALSE (((ver1 & GTPU_VER_MASK) != GTPU_V1_VER) | (!has_space1))) + 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); + } + } + + /* End of processing for packet 0, start for packet 1 */ + if (PREDICT_FALSE ((!is_fast_track1) | (!has_space1))) { - error1 = has_space1 ? GTPU_ERROR_BAD_VER : GTPU_ERROR_TOO_SMALL; + /* 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; } @@ -347,20 +631,27 @@ gtpu_input (vlib_main_t * vm, { 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; } @@ -381,6 +672,9 @@ gtpu_input (vlib_main_t * vm, } 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 */ { @@ -398,21 +692,28 @@ gtpu_input (vlib_main_t * vm, { 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_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); + 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; } @@ -434,11 +735,63 @@ gtpu_input (vlib_main_t * vm, } 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: + + /* 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)) + { + error1 = GTPU_ERROR_NO_ERROR_TUNNEL; + next1 = GTPU_INPUT_NEXT_DROP; + goto trace1; + } + + /* Clear the error, next0 will be overwritten by the tunnel */ + error1 = 0; + + 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 + { + /* 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; + } next1: - /* Pop gtpu header */ + /* Pop gtpu header / push IP+UDP header */ vlib_buffer_advance (b1, gtpu_hdr_len1); next1 = t1->decap_next_index; @@ -484,13 +837,21 @@ gtpu_input (vlib_main_t * vm, 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); } + /* 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; @@ -499,7 +860,7 @@ gtpu_input (vlib_main_t * vm, ip4_header_t * ip4_0; ip6_header_t * ip6_0; gtpu_header_t * gtpu0; - u32 gtpu_hdr_len0; + i32 gtpu_hdr_len0; uword * p0; u32 tunnel_index0; gtpu_tunnel_t * t0, * mt0 = NULL; @@ -509,6 +870,13 @@ gtpu_input (vlib_main_t * vm, 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; @@ -526,112 +894,197 @@ gtpu_input (vlib_main_t * vm, } else { ip6_0 = (void *)((u8*)gtpu0 - sizeof(udp_header_t) - sizeof(ip6_header_t)); } + udp0 = (void *) ((u8 *) gtpu0 - sizeof (udp_header_t)); - tunnel_index0 = ~0; - error0 = 0; - - /* speculatively load gtp header version field */ - ver0 = gtpu0->ver_flags; + 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 */ - gtpu_hdr_len0 = sizeof(gtpu_header_t) - (((ver0 & GTPU_E_S_PN_BIT) == 0) * 4); - has_space0 = vlib_buffer_has_space (b0, gtpu_hdr_len0); + 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); - if (PREDICT_FALSE (((ver0 & GTPU_VER_MASK) != GTPU_V1_VER) | (!has_space0))) - { - error0 = has_space0 ? GTPU_ERROR_BAD_VER : GTPU_ERROR_TOO_SMALL; - next0 = GTPU_INPUT_NEXT_DROP; - goto trace00; - } + ext0 = (ver0 & GTPU_E_BIT) ? + (gtpu_ext_header_t *) >pu0->next_ext_type : + &ext; - if (is_ip4) { - key4_0.src = ip4_0->src_address.as_u32; - key4_0.teid = gtpu0->teid; + gtpu_hdr_len0 = sizeof (gtpu_header_t) - + (((ver0 & GTPU_E_S_PN_BIT) == 0) * 4) + + ext0->len * 4; - /* 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); + ext0 += ext0->len * 4 / sizeof (*ext0); - /* 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; - } + has_space0 = vlib_buffer_has_space (b0, gtpu_hdr_len0); - /* 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 ((!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; - } 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; + 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 (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_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); + 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 (ip6_address_is_equal (&ip6_0->dst_address, - &t0->src.ip6))) + if (PREDICT_FALSE (tunnel_index0 != ~0)) + goto forward00; + + /* The packet is ipv6/not forwarded */ + goto trace00; + } + + 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 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))) goto next00; /* valid packet */ if (PREDICT_FALSE (ip6_address_is_multicast (&ip6_0->dst_address))) { @@ -647,11 +1100,63 @@ gtpu_input (vlib_main_t * vm, } 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; - } + } + + /* 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)) + { + error0 = GTPU_ERROR_NO_ERROR_TUNNEL; + next0 = GTPU_INPUT_NEXT_DROP; + goto trace00; + } + + /* Clear the error, next0 will be overwritten by the tunnel */ + error0 = 0; + + 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 + { + /* 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; + } next00: - /* Pop gtpu header */ + /* Pop gtpu header / push IP+UDP header */ vlib_buffer_advance (b0, gtpu_hdr_len0); next0 = t0->decap_next_index; @@ -697,7 +1202,13 @@ gtpu_input (vlib_main_t * vm, 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); @@ -790,6 +1301,8 @@ typedef enum { 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, @@ -1356,128 +1869,183 @@ gtpu_flow_input (vlib_main_t * vm, 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; + /* Prefetch next iteration. */ + { + vlib_buffer_t *p2, *p3; - p2 = vlib_get_buffer (vm, from[2]); - p3 = vlib_get_buffer (vm, from[3]); + 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 (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); - } + 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; + 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); + 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); + /* 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); + 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); - - if (ip_err0 || udp_err0 || csum_err0) - { - next0 = GTPU_INPUT_NEXT_DROP; - error0 = gtpu_err_code (ip_err0, udp_err0, csum_err0); - goto trace0; - } - - /* 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 - */ - gtpu_hdr_len0 = sizeof(gtpu_header_t) - (((ver0 & GTPU_E_S_PN_BIT) == 0) * 4); - - has_space0 = vlib_buffer_has_space (b0, gtpu_hdr_len0); - if (PREDICT_FALSE (((ver0 & GTPU_VER_MASK) != GTPU_V1_VER) | (!has_space0))) - { - error0 = has_space0 ? GTPU_ERROR_BAD_VER : GTPU_ERROR_TOO_SMALL; - next0 = GTPU_INPUT_NEXT_DROP; - 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; + tunnel_index0 = ~0; + error0 = 0; - sw_if_index0 = t0->sw_if_index; + tunnel_index1 = ~0; + error1 = 0; - /* Set packet input sw_if_index to unicast GTPU tunnel for learning */ - vnet_buffer(b0)->sw_if_index[VLIB_RX] = sw_if_index0; + 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); - pkts_decapsulated ++; - stats_n_packets += 1; - stats_n_bytes += len0; + 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); - /* 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; - } + /* 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; @@ -1490,81 +2058,103 @@ trace0: 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; - } + if (ip_err1 || udp_err1 || csum_err1) + { + next1 = GTPU_INPUT_NEXT_DROP; + error1 = gtpu_err_code (ip_err1, udp_err1, csum_err1); + goto trace1; + } - /* speculatively load gtp header version field */ - ver1 = gtpu1->ver_flags; + /* + * 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; - /* - * Manipulate gtpu header - * TBD: Manipulate Sequence Number and N-PDU Number - * TBD: Manipulate Next Extension Header - */ - gtpu_hdr_len1 = sizeof(gtpu_header_t) - (((ver1 & GTPU_E_S_PN_BIT) == 0) * 4); - has_space1 = vlib_buffer_has_space (b1, gtpu_hdr_len1); - if (PREDICT_FALSE (((ver1 & GTPU_VER_MASK) != GTPU_V1_VER) | (!has_space1))) - { - error1 = has_space1 ? GTPU_ERROR_BAD_VER : GTPU_ERROR_TOO_SMALL; - next1 = GTPU_INPUT_NEXT_DROP; - goto trace1; - } + /* 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; + /* 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; - sw_if_index1 = t1->sw_if_index; + /* Pop gtpu header */ + vlib_buffer_advance (b1, gtpu_hdr_len1); - /* 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); + /* 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; - /* Set packet input sw_if_index to unicast GTPU tunnel for learning */ - vnet_buffer(b1)->sw_if_index[VLIB_RX] = sw_if_index1; + sw_if_index1 = t1->sw_if_index; - pkts_decapsulated ++; - stats_n_packets += 1; - stats_n_bytes += len1; + /* 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; - /* 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; - } + 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; @@ -1577,12 +2167,18 @@ trace1: 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); - } + 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) { @@ -1597,97 +2193,135 @@ trace1: 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); - - if (ip_err0 || udp_err0 || csum_err0) - { - next0 = GTPU_INPUT_NEXT_DROP; - error0 = gtpu_err_code (ip_err0, udp_err0, csum_err0); - goto trace00; - } + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; - /* udp leaves current_data pointing at the gtpu header */ - gtpu0 = vlib_buffer_get_current (b0); + b0 = vlib_get_buffer (vm, bi0); + len0 = vlib_buffer_length_in_chain (vm, b0); - /* speculatively load gtp header version field */ - ver0 = gtpu0->ver_flags; + tunnel_index0 = ~0; + error0 = 0; - /* - * Manipulate gtpu header - * TBD: Manipulate Sequence Number and N-PDU Number - * TBD: Manipulate Next Extension Header - */ - gtpu_hdr_len0 = sizeof(gtpu_header_t) - (((ver0 & GTPU_E_S_PN_BIT) == 0) * 4); + 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); - has_space0 = vlib_buffer_has_space (b0, gtpu_hdr_len0); - if (PREDICT_FALSE (((ver0 & GTPU_VER_MASK) != GTPU_V1_VER) | (!has_space0))) - { - error0 = has_space0 ? GTPU_ERROR_BAD_VER : GTPU_ERROR_TOO_SMALL; - next0 = GTPU_INPUT_NEXT_DROP; - 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; + /* udp leaves current_data pointing at the gtpu header */ + gtpu0 = vlib_buffer_get_current (b0); - sw_if_index0 = t0->sw_if_index; + /* speculatively load gtp header version field */ + ver0 = gtpu0->ver_flags; - /* Set packet input sw_if_index to unicast GTPU tunnel for learning */ - vnet_buffer(b0)->sw_if_index[VLIB_RX] = sw_if_index0; + /* + * 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; + } - pkts_decapsulated ++; - stats_n_packets += 1; - stats_n_bytes += len0; + 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; - /* 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; - } + /* 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; @@ -1699,11 +2333,16 @@ trace1: tr->error = error0; tr->tunnel_index = tunnel_index0; tr->teid = has_space0 ? clib_net_to_host_u32(gtpu0->teid) : ~0; - } - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, - bi0, next0); - } + 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); } diff --git a/src/plugins/gtpu/gtpu_encap.c b/src/plugins/gtpu/gtpu_encap.c index 4b7d98786f4..2c3c46a4be2 100644 --- a/src/plugins/gtpu/gtpu_encap.c +++ b/src/plugins/gtpu/gtpu_encap.c @@ -199,7 +199,8 @@ gtpu_encap_inline (vlib_main_t * vm, copy_dst3 = (u64 *) ip4_3; copy_src3 = (u64 *) t3->rewrite; - /* Copy first 32 octets 8-bytes at a time */ + /* Copy first 32 octets 8-bytes at a time (minimum size) + * TODO: check if clib_memcpy_fast is better */ #define _(offs) copy_dst0[offs] = copy_src0[offs]; foreach_fixed_header4_offset; #undef _ @@ -212,19 +213,83 @@ gtpu_encap_inline (vlib_main_t * vm, #define _(offs) copy_dst3[offs] = copy_src3[offs]; foreach_fixed_header4_offset; #undef _ - /* Last 4 octets. Hopefully gcc will be our friend */ - copy_dst_last0 = (u32 *)(©_dst0[4]); - copy_src_last0 = (u32 *)(©_src0[4]); - copy_dst_last0[0] = copy_src_last0[0]; - copy_dst_last1 = (u32 *)(©_dst1[4]); - copy_src_last1 = (u32 *)(©_src1[4]); - copy_dst_last1[0] = copy_src_last1[0]; - copy_dst_last2 = (u32 *)(©_dst2[4]); - copy_src_last2 = (u32 *)(©_src2[4]); - copy_dst_last2[0] = copy_src_last2[0]; - copy_dst_last3 = (u32 *)(©_dst3[4]); - copy_src_last3 = (u32 *)(©_src3[4]); - copy_dst_last3[0] = copy_src_last3[0]; + + /* Copy last octets */ + if (_vec_len (t0->rewrite) == 36) + { + /* Last 4 octets. Hopefully gcc will be our friend */ + copy_dst_last0 = (u32 *) (©_dst0[4]); + copy_src_last0 = (u32 *) (©_src0[4]); + copy_dst_last0[0] = copy_src_last0[0]; + } + else + { + /* Near last 8 octets. */ +#define _(offs) copy_dst0[offs] = copy_src0[offs]; + _ (4); +#undef _ + /* Last 4 octets. Hopefully gcc will be our friend */ + copy_dst_last0 = (u32 *) (©_dst0[5]); + copy_src_last0 = (u32 *) (©_src0[5]); + copy_dst_last0[0] = copy_src_last0[0]; + } + + if (_vec_len (t1->rewrite) == 36) + { + /* Last 4 octets. Hopefully gcc will be our friend */ + copy_dst_last1 = (u32 *) (©_dst1[4]); + copy_src_last1 = (u32 *) (©_src1[4]); + copy_dst_last1[0] = copy_src_last1[0]; + } + else + { + /* Near last 8 octets. */ +#define _(offs) copy_dst1[offs] = copy_src1[offs]; + _ (4); +#undef _ + /* Last 4 octets. Hopefully gcc will be our friend */ + copy_dst_last1 = (u32 *) (©_dst1[5]); + copy_src_last1 = (u32 *) (©_src1[5]); + copy_dst_last1[0] = copy_src_last1[0]; + } + + if (_vec_len (t2->rewrite) == 36) + { + /* Last 4 octets. Hopefully gcc will be our friend */ + copy_dst_last2 = (u32 *) (©_dst2[4]); + copy_src_last2 = (u32 *) (©_src2[4]); + copy_dst_last2[0] = copy_src_last2[0]; + } + else + { + /* Near last 8 octets. */ +#define _(offs) copy_dst2[offs] = copy_src2[offs]; + _ (4); +#undef _ + /* Last 4 octets. Hopefully gcc will be our friend */ + copy_dst_last2 = (u32 *) (©_dst2[5]); + copy_src_last2 = (u32 *) (©_src2[5]); + copy_dst_last2[0] = copy_src_last2[0]; + } + + if (_vec_len (t3->rewrite) == 36) + { + /* Last 4 octets. Hopefully gcc will be our friend */ + copy_dst_last3 = (u32 *) (©_dst3[4]); + copy_src_last3 = (u32 *) (©_src3[4]); + copy_dst_last3[0] = copy_src_last3[0]; + } + else + { + /* Near last 8 octets. */ +#define _(offs) copy_dst3[offs] = copy_src3[offs]; + _ (4); +#undef _ + /* Last 4 octets. Hopefully gcc will be our friend */ + copy_dst_last3 = (u32 *) (©_dst3[5]); + copy_src_last3 = (u32 *) (©_src3[5]); + copy_dst_last3[0] = copy_src_last3[0]; + } /* Fix the IP4 checksum and length */ sum0 = ip4_0->checksum; @@ -318,7 +383,7 @@ gtpu_encap_inline (vlib_main_t * vm, copy_src2 = (u64 *) t2->rewrite; copy_dst3 = (u64 *) ip6_3; copy_src3 = (u64 *) t3->rewrite; - /* Copy first 56 (ip6) octets 8-bytes at a time */ + /* Copy first 56 (ip6) octets 8-bytes at a time (minimum size) */ #define _(offs) copy_dst0[offs] = copy_src0[offs]; foreach_fixed_header6_offset; #undef _ @@ -331,6 +396,40 @@ gtpu_encap_inline (vlib_main_t * vm, #define _(offs) copy_dst3[offs] = copy_src3[offs]; foreach_fixed_header6_offset; #undef _ + + /* Copy last octets */ + if (_vec_len (t0->rewrite) == 64) + { + /* Last 8 octets. */ +#define _(offs) copy_dst0[offs] = copy_src0[offs]; + _ (7); +#undef _ + } + + if (_vec_len (t1->rewrite) == 64) + { + /* Last 8 octets. */ +#define _(offs) copy_dst1[offs] = copy_src1[offs]; + _ (7); +#undef _ + } + + if (_vec_len (t2->rewrite) == 64) + { + /* Last 8 octets. */ +#define _(offs) copy_dst2[offs] = copy_src2[offs]; + _ (7); +#undef _ + } + + if (_vec_len (t3->rewrite) == 64) + { + /* Last 8 octets. */ +#define _(offs) copy_dst3[offs] = copy_src3[offs]; + _ (7); +#undef _ + } + /* Fix IP6 payload length */ new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) @@ -466,15 +565,19 @@ gtpu_encap_inline (vlib_main_t * vm, vlib_add_trace (vm, node, b0, sizeof (*tr)); tr->tunnel_index = t0 - gtm->tunnels; tr->tteid = t0->tteid; - } + tr->pdu_extension = t0->pdu_extension; + tr->qfi = t0->qfi; + } - if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED)) - { - gtpu_encap_trace_t *tr = - vlib_add_trace (vm, node, b1, sizeof (*tr)); - tr->tunnel_index = t1 - gtm->tunnels; - tr->tteid = t1->tteid; - } + if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) + { + gtpu_encap_trace_t *tr = + vlib_add_trace (vm, node, b1, sizeof (*tr)); + tr->tunnel_index = t1 - gtm->tunnels; + tr->tteid = t1->tteid; + tr->pdu_extension = t1->pdu_extension; + tr->qfi = t1->qfi; + } if (PREDICT_FALSE(b2->flags & VLIB_BUFFER_IS_TRACED)) { @@ -482,15 +585,19 @@ gtpu_encap_inline (vlib_main_t * vm, vlib_add_trace (vm, node, b2, sizeof (*tr)); tr->tunnel_index = t2 - gtm->tunnels; tr->tteid = t2->tteid; - } + tr->pdu_extension = t2->pdu_extension; + tr->qfi = t2->qfi; + } - if (PREDICT_FALSE(b3->flags & VLIB_BUFFER_IS_TRACED)) - { - gtpu_encap_trace_t *tr = - vlib_add_trace (vm, node, b3, sizeof (*tr)); - tr->tunnel_index = t3 - gtm->tunnels; - tr->tteid = t3->tteid; - } + if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED)) + { + gtpu_encap_trace_t *tr = + vlib_add_trace (vm, node, b3, sizeof (*tr)); + tr->tunnel_index = t3 - gtm->tunnels; + tr->tteid = t3->tteid; + tr->pdu_extension = t3->pdu_extension; + tr->qfi = t3->qfi; + } vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next, n_left_to_next, @@ -532,8 +639,9 @@ gtpu_encap_inline (vlib_main_t * vm, next0 = t0->next_dpo.dpoi_next_node; vnet_buffer(b0)->ip.adj_index[VLIB_TX] = t0->next_dpo.dpoi_index; - /* Apply the rewrite string. $$$$ vnet_rewrite? */ - vlib_buffer_advance (b0, -(word)_vec_len(t0->rewrite)); + /* Apply the rewrite string. $$$$ vnet_rewrite. + * The correct total size is set in ip_udp_gtpu_rewrite() */ + vlib_buffer_advance (b0, -(word) _vec_len (t0->rewrite)); if (is_ip4) { @@ -546,10 +654,26 @@ gtpu_encap_inline (vlib_main_t * vm, #define _(offs) copy_dst0[offs] = copy_src0[offs]; foreach_fixed_header4_offset; #undef _ - /* Last 4 octets. Hopefully gcc will be our friend */ - copy_dst_last0 = (u32 *)(©_dst0[4]); - copy_src_last0 = (u32 *)(©_src0[4]); - copy_dst_last0[0] = copy_src_last0[0]; + + /* Copy last octets */ + if (_vec_len (t0->rewrite) == 36) + { + /* Last 4 octets. Hopefully gcc will be our friend */ + copy_dst_last0 = (u32 *) (©_dst0[4]); + copy_src_last0 = (u32 *) (©_src0[4]); + copy_dst_last0[0] = copy_src_last0[0]; + } + else + { + /* Near last 8 octets. */ +#define _(offs) copy_dst0[offs] = copy_src0[offs]; + _ (4); +#undef _ + /* Last 4 octets. Hopefully gcc will be our friend */ + copy_dst_last0 = (u32 *) (©_dst0[5]); + copy_src_last0 = (u32 *) (©_src0[5]); + copy_dst_last0[0] = copy_src_last0[0]; + } /* Fix the IP4 checksum and length */ sum0 = ip4_0->checksum; @@ -587,6 +711,16 @@ gtpu_encap_inline (vlib_main_t * vm, #define _(offs) copy_dst0[offs] = copy_src0[offs]; foreach_fixed_header6_offset; #undef _ + + /* Copy last octets */ + if (_vec_len (t0->rewrite) == 64) + { + /* Last 8 octets. */ +#define _(offs) copy_dst0[offs] = copy_src0[offs]; + _ (7); +#undef _ + } + /* Fix IP6 payload length */ new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) @@ -600,9 +734,9 @@ gtpu_encap_inline (vlib_main_t * vm, /* Fix GTPU length */ gtpu0 = (gtpu_header_t *)(udp0+1); - new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0) - - sizeof (*ip4_0) - sizeof(*udp0) - - GTPU_V1_HDR_LEN); + new_l0 = clib_host_to_net_u16 ( + vlib_buffer_length_in_chain (vm, b0) - sizeof (*ip6_0) - + sizeof (*udp0) - GTPU_V1_HDR_LEN); gtpu0->length = new_l0; /* IPv6 UDP checksum is mandatory */ @@ -644,7 +778,9 @@ gtpu_encap_inline (vlib_main_t * vm, vlib_add_trace (vm, node, b0, sizeof (*tr)); tr->tunnel_index = t0 - gtm->tunnels; tr->tteid = t0->tteid; - } + tr->pdu_extension = t0->pdu_extension; + tr->qfi = t0->qfi; + } vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); diff --git a/src/plugins/gtpu/gtpu_error.def b/src/plugins/gtpu/gtpu_error.def index 4351529ef25..6b521c8658a 100644 --- a/src/plugins/gtpu/gtpu_error.def +++ b/src/plugins/gtpu/gtpu_error.def @@ -17,3 +17,5 @@ gtpu_error (NO_SUCH_TUNNEL, "no such tunnel packets") gtpu_error (BAD_VER, "packets with bad version in gtpu header") gtpu_error (BAD_FLAGS, "packets with bad flags field in gtpu header") gtpu_error (TOO_SMALL, "packet too small to fit a gtpu header") +gtpu_error (UNSUPPORTED_TYPE, "packets with message type < 255 in gtpu header") +gtpu_error (NO_ERROR_TUNNEL, "did not find an forward tunnel") diff --git a/src/plugins/gtpu/gtpu_test.c b/src/plugins/gtpu/gtpu_test.c index dcfe3d02666..fadcb82cb88 100644 --- a/src/plugins/gtpu/gtpu_test.c +++ b/src/plugins/gtpu/gtpu_test.c @@ -298,9 +298,9 @@ api_gtpu_add_del_tunnel (vat_main_t * vam) unformat_gtpu_decap_next, &decap_next_index)) ; else if (unformat (line_input, "teid %d", &teid)) - ; + ; else if (unformat (line_input, "tteid %d", &tteid)) - ; + ; else { errmsg ("parse error '%U'", format_unformat_error, line_input); @@ -360,6 +360,175 @@ api_gtpu_add_del_tunnel (vat_main_t * vam) return ret; } +static void +vl_api_gtpu_add_del_tunnel_v2_reply_t_handler ( + vl_api_gtpu_add_del_tunnel_v2_reply_t *mp) +{ + vat_main_t *vam = &vat_main; + i32 retval = ntohl (mp->retval); + if (vam->async_mode) + { + vam->async_errors += (retval < 0); + } + else + { + vam->retval = retval; + vam->sw_if_index = ntohl (mp->sw_if_index); + vam->result_ready = 1; + } +} + +static int +api_gtpu_add_del_tunnel_v2 (vat_main_t *vam) +{ + unformat_input_t *line_input = vam->input; + vl_api_gtpu_add_del_tunnel_v2_t *mp; + ip46_address_t src, dst; + u8 is_add = 1; + u8 ipv4_set = 0, ipv6_set = 0; + u8 src_set = 0; + u8 dst_set = 0; + u8 grp_set = 0; + u32 mcast_sw_if_index = ~0; + u32 encap_vrf_id = 0; + u32 decap_next_index = ~0; + u32 teid = 0, tteid = 0; + u8 pdu_extension = 0; + u32 qfi = 0; + int ret; + + /* Can't "universally zero init" (={0}) due to GCC bug 53119 */ + clib_memset (&src, 0, sizeof src); + clib_memset (&dst, 0, sizeof dst); + + while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (line_input, "del")) + is_add = 0; + else if (unformat (line_input, "src %U", unformat_ip4_address, &src.ip4)) + { + ipv4_set = 1; + src_set = 1; + } + else if (unformat (line_input, "dst %U", unformat_ip4_address, &dst.ip4)) + { + ipv4_set = 1; + dst_set = 1; + } + else if (unformat (line_input, "src %U", unformat_ip6_address, &src.ip6)) + { + ipv6_set = 1; + src_set = 1; + } + else if (unformat (line_input, "dst %U", unformat_ip6_address, &dst.ip6)) + { + ipv6_set = 1; + dst_set = 1; + } + else if (unformat (line_input, "group %U %U", unformat_ip4_address, + &dst.ip4, api_unformat_sw_if_index, vam, + &mcast_sw_if_index)) + { + grp_set = dst_set = 1; + ipv4_set = 1; + } + else if (unformat (line_input, "group %U", unformat_ip4_address, + &dst.ip4)) + { + grp_set = dst_set = 1; + ipv4_set = 1; + } + else if (unformat (line_input, "group %U %U", unformat_ip6_address, + &dst.ip6, api_unformat_sw_if_index, vam, + &mcast_sw_if_index)) + { + grp_set = dst_set = 1; + ipv6_set = 1; + } + else if (unformat (line_input, "group %U", unformat_ip6_address, + &dst.ip6)) + { + grp_set = dst_set = 1; + ipv6_set = 1; + } + else if (unformat (line_input, "mcast_sw_if_index %u", + &mcast_sw_if_index)) + ; + else if (unformat (line_input, "encap-vrf-id %d", &encap_vrf_id)) + ; + else if (unformat (line_input, "decap-next %U", unformat_gtpu_decap_next, + &decap_next_index)) + ; + else if (unformat (line_input, "teid %d", &teid)) /* Change to %u ? */ + ; + else if (unformat (line_input, "tteid %d", &tteid)) /* Change to %u ? */ + ; + else if (unformat (line_input, "qfi %u", &qfi)) + pdu_extension = 1; + else + { + errmsg ("parse error '%U'", format_unformat_error, line_input); + return -99; + } + } + + if (is_add && src_set == 0) + { + errmsg ("tunnel src address not specified"); + return -99; + } + if (dst_set == 0) + { + errmsg ("tunnel dst address not specified"); + return -99; + } + + if (grp_set && !ip46_address_is_multicast (&dst)) + { + errmsg ("tunnel group address not multicast"); + return -99; + } + if (grp_set && mcast_sw_if_index == ~0) + { + errmsg ("tunnel nonexistent multicast device"); + return -99; + } + if (grp_set == 0 && ip46_address_is_multicast (&dst)) + { + errmsg ("tunnel dst address must be unicast"); + return -99; + } + + if (ipv4_set && ipv6_set) + { + errmsg ("both IPv4 and IPv6 addresses specified"); + return -99; + } + if (qfi > 31) + { + errmsg ("qfi max value is 31"); + return -99; + } + + M (GTPU_ADD_DEL_TUNNEL_V2, mp); + + ip_address_encode (&src, ipv6_set ? IP46_TYPE_IP6 : IP46_TYPE_IP4, + &mp->src_address); + ip_address_encode (&dst, ipv6_set ? IP46_TYPE_IP6 : IP46_TYPE_IP4, + &mp->dst_address); + mp->encap_vrf_id = ntohl (encap_vrf_id); + mp->decap_next_index = ntohl (decap_next_index); + mp->mcast_sw_if_index = ntohl (mcast_sw_if_index); + mp->teid = ntohl (teid); + mp->tteid = ntohl (tteid); + mp->is_add = is_add; + mp->pdu_extension = pdu_extension; + mp->qfi = ntohl (qfi); + + S (mp); + W (ret); + return ret; +} static int api_gtpu_tunnel_update_tteid (vat_main_t * vam) { @@ -436,6 +605,40 @@ static void vl_api_gtpu_tunnel_details_t_handler ntohl (mp->mcast_sw_if_index)); } +static void +vl_api_gtpu_tunnel_v2_details_t_handler (vl_api_gtpu_tunnel_v2_details_t *mp) +{ + vat_main_t *vam = &vat_main; + ip46_address_t src; + ip46_address_t dst; + ip_address_decode (&mp->dst_address, &dst); + ip_address_decode (&mp->src_address, &src); + print (vam->ofp, "%11d%24U%24U%14d%18d%13d%13d%19d%15d%5d%15d%17d", + ntohl (mp->sw_if_index), format_ip46_address, &src, IP46_TYPE_ANY, + format_ip46_address, &dst, IP46_TYPE_ANY, ntohl (mp->encap_vrf_id), + ntohl (mp->decap_next_index), ntohl (mp->teid), ntohl (mp->tteid), + ntohl (mp->mcast_sw_if_index), mp->pdu_extension, mp->qfi, + mp->is_forwarding, ntohl (mp->forwarding_type)); +} + +static void +vl_api_gtpu_add_del_forward_reply_t_handler ( + vl_api_gtpu_add_del_forward_reply_t *mp) +{ + vat_main_t *vam = &vat_main; + i32 retval = ntohl (mp->retval); + if (vam->async_mode) + { + vam->async_errors += (retval < 0); + } + else + { + vam->retval = retval; + vam->sw_if_index = ntohl (mp->sw_if_index); + vam->result_ready = 1; + } +} + static int api_gtpu_tunnel_dump (vat_main_t * vam) { @@ -480,4 +683,163 @@ api_gtpu_tunnel_dump (vat_main_t * vam) return 0; } +static int +api_gtpu_tunnel_v2_dump (vat_main_t *vam) +{ + unformat_input_t *i = vam->input; + vl_api_gtpu_tunnel_dump_t *mp; + u32 sw_if_index; + u8 sw_if_index_set = 0; + + /* Parse args required to build the message */ + while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT) + { + if (unformat (i, "sw_if_index %d", &sw_if_index)) + sw_if_index_set = 1; + else + break; + } + + if (sw_if_index_set == 0) + { + sw_if_index = ~0; + } + + if (!vam->json_output) + { + print (vam->ofp, "%11s%24s%24s%14s%18s%13s%13s%19s%12s%5s%15s%17s", + "sw_if_index", "src_address", "dst_address", "encap_vrf_id", + "decap_next_index", "teid", "tteid", "mcast_sw_if_index", + "pdu_extension", "qfi", "is_forwarding", "forwarding_type"); + } + + /* Get list of gtpu-tunnel interfaces */ + M (GTPU_TUNNEL_DUMP, mp); + + mp->sw_if_index = htonl (sw_if_index); + + S (mp); + + /* No status response for this API call. + * Wait 1 sec for any dump output before return to vat# */ + sleep (1); + + return 0; +} + +static int +api_gtpu_add_del_forward (vat_main_t *vam) +{ + unformat_input_t *line_input = vam->input; + vl_api_gtpu_add_del_forward_t *mp; + int ret; + u32 decap_next_index = GTPU_INPUT_NEXT_L2_INPUT; + int is_add = 1; + ip46_address_t dst; + u8 dst_set = 0; + u8 type = 0; + u8 ipv6_set = 0; + u32 encap_vrf_id; + + /* Cant "universally zero init" (={0}) due to GCC bug 53119 */ + clib_memset (&dst, 0, sizeof dst); + + while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (line_input, "dst %U", unformat_ip4_address, &dst.ip4)) + dst_set = 1; + else if (unformat (line_input, "dst %U", unformat_ip6_address, &dst.ip6)) + { + dst_set = 1; + ipv6_set = 1; + } + else if (unformat (line_input, "decap-next %U", unformat_gtpu_decap_next, + &decap_next_index)) + ; + else if (unformat (line_input, "encap-vrf-id %d", &encap_vrf_id)) + ; + else if (unformat (line_input, "del")) + is_add = 0; + else if (unformat (line_input, "bad-header")) + type |= GTPU_FORWARD_BAD_HEADER; + else if (unformat (line_input, "unknown-teid")) + type |= GTPU_FORWARD_UNKNOWN_TEID; + else if (unformat (line_input, "unknown-type")) + type |= GTPU_FORWARD_UNKNOWN_TYPE; + else + { + errmsg ("parse error '%U'", format_unformat_error, line_input); + return -99; + } + } + + if (!dst_set) + { + errmsg ("dst must be set to a valid IP address"); + return -99; + } + + M (GTPU_ADD_DEL_FORWARD, mp); + + mp->is_add = is_add; + ip_address_encode (&dst, ipv6_set ? IP46_TYPE_IP6 : IP46_TYPE_IP4, + &mp->dst_address); + mp->forwarding_type = type; + mp->encap_vrf_id = ntohl (encap_vrf_id); + mp->decap_next_index = ntohl (decap_next_index); + + S (mp); + W (ret); + return ret; +} + +static int +api_gtpu_get_transfer_counts (vat_main_t *vam) +{ + unformat_input_t *line_input = vam->input; + vl_api_gtpu_get_transfer_counts_t *mp; + u32 start_index; + u32 capacity; + int ret; + + while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (line_input, "start_index %u", &start_index)) + ; + else if (unformat (line_input, "capacity %u", &capacity)) + ; + else + { + errmsg ("parse error '%U'", format_unformat_error, line_input); + return -99; + } + } + + M (GTPU_GET_TRANSFER_COUNTS, mp); + mp->sw_if_index_start = start_index; + mp->capacity = capacity; + + S (mp); // TODO: Handle the prints somehow. But how is it done?? + W (ret); + return ret; +} + +static void +vl_api_gtpu_get_transfer_counts_reply_t_handler ( + vl_api_gtpu_get_transfer_counts_reply_t *mp) +{ + vat_main_t *vam = &vat_main; + i32 retval = ntohl (mp->retval); + if (vam->async_mode) + { + vam->async_errors += (retval < 0); + } + else + { + vam->retval = retval; + // TODO: Add reply here? + vam->result_ready = 1; + } +} + #include <gtpu/gtpu.api_test.c> |