diff options
| -rw-r--r-- | src/plugins/gtpu/gtpu.api | 17 | ||||
| -rw-r--r-- | src/plugins/gtpu/gtpu.c | 140 | ||||
| -rw-r--r-- | src/plugins/gtpu/gtpu.h | 9 | ||||
| -rw-r--r-- | src/plugins/gtpu/gtpu_api.c | 59 | ||||
| -rw-r--r-- | src/plugins/gtpu/gtpu_decap.c | 504 | ||||
| -rw-r--r-- | src/plugins/gtpu/gtpu_test.c | 58 |
6 files changed, 785 insertions, 2 deletions
diff --git a/src/plugins/gtpu/gtpu.api b/src/plugins/gtpu/gtpu.api index 052e6a292d7..f084cc84e19 100644 --- a/src/plugins/gtpu/gtpu.api +++ b/src/plugins/gtpu/gtpu.api @@ -106,6 +106,23 @@ autoreply define sw_interface_set_gtpu_bypass option vat_help = "<intfc> | sw_if_index <id> [ip4 | ip6] [enable | disable]"; }; +/** \brief Offload gtpu rx request + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param hw_if_index - rx hw interface + @param sw_if_index - gtpu interface to offload + @param enable - if non-zero enable, else disable +*/ +autoreply define gtpu_offload_rx +{ + u32 client_index; + u32 context; + u32 hw_if_index; + u32 sw_if_index; + u8 enable; + option vat_help = "hw <intfc> rx <tunnel-name> [del]"; +}; + /* * Local Variables: * eval: (c-set-style "gnu") diff --git a/src/plugins/gtpu/gtpu.c b/src/plugins/gtpu/gtpu.c index 48ac8a7a2f1..905ca5e1ca5 100644 --- a/src/plugins/gtpu/gtpu.c +++ b/src/plugins/gtpu/gtpu.c @@ -31,7 +31,7 @@ #include <vnet/plugin/plugin.h> #include <vpp/app/version.h> #include <gtpu/gtpu.h> - +#include <vnet/flow/flow.h> gtpu_main_t gtpu_main; @@ -419,6 +419,9 @@ int vnet_gtpu_add_del_tunnel ip_udp_gtpu_rewrite (t, is_ip6); + /* clear the flow index */ + t->flow_index = ~0; + /* copy the key */ if (is_ip6) hash_set_mem_alloc (>m->gtpu6_tunnel_by_key, &key6, @@ -602,6 +605,9 @@ int vnet_gtpu_add_del_tunnel if (!ip46_address_is_multicast (&t->dst)) { + if (t->flow_index != ~0) + vnet_flow_del (vnm, t->flow_index); + vtep_addr_unref (&t->src); fib_entry_untrack (t->fib_entry_index, t->sibling_index); } @@ -1093,6 +1099,135 @@ VLIB_CLI_COMMAND (set_interface_ip6_gtpu_bypass_command, static) = { }; /* *INDENT-ON* */ +int +vnet_gtpu_add_del_rx_flow (u32 hw_if_index, u32 t_index, int is_add) +{ + gtpu_main_t *gtm = >pu_main; + gtpu_tunnel_t *t = pool_elt_at_index (gtm->tunnels, t_index); + vnet_main_t *vnm = vnet_get_main (); + if (is_add) + { + if (t->flow_index == ~0) + { + vnet_flow_t flow = { + .actions = + VNET_FLOW_ACTION_REDIRECT_TO_NODE | VNET_FLOW_ACTION_MARK | + VNET_FLOW_ACTION_BUFFER_ADVANCE, + .mark_flow_id = t_index + gtm->flow_id_start, + .redirect_node_index = gtpu4_flow_input_node.index, + .buffer_advance = sizeof (ethernet_header_t) + + sizeof (ip4_header_t) + sizeof (udp_header_t), + .type = VNET_FLOW_TYPE_IP4_GTPU_IP4, + .ip4_gtpu = { + .protocol = IP_PROTOCOL_UDP, + .src_addr.addr = t->dst.ip4, + .src_addr.mask.as_u32 = ~0, + .dst_addr.addr = t->src.ip4, + .dst_addr.mask.as_u32 = ~0, + .teid = t->teid, + } + , + }; + vnet_flow_add (vnm, &flow, &t->flow_index); + } + + return vnet_flow_enable (vnm, t->flow_index, hw_if_index); + } + + /* flow index is removed when the tunnel is deleted */ + return vnet_flow_disable (vnm, t->flow_index, hw_if_index); +} + +u32 +vnet_gtpu_get_tunnel_index (u32 sw_if_index) +{ + gtpu_main_t *gtm = >pu_main; + + if (sw_if_index >= vec_len (gtm->tunnel_index_by_sw_if_index)) + return ~0; + return gtm->tunnel_index_by_sw_if_index[sw_if_index]; +} + +static clib_error_t * +gtpu_offload_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; + + vnet_main_t *vnm = vnet_get_main (); + u32 rx_sw_if_index = ~0; + u32 hw_if_index = ~0; + int is_add = 1; + + while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (line_input, "hw %U", unformat_vnet_hw_interface, vnm, + &hw_if_index)) + continue; + if (unformat (line_input, "rx %U", unformat_vnet_sw_interface, vnm, + &rx_sw_if_index)) + continue; + if (unformat (line_input, "del")) + { + is_add = 0; + continue; + } + return clib_error_return (0, "unknown input `%U'", + format_unformat_error, line_input); + } + + if (rx_sw_if_index == ~0) + return clib_error_return (0, "missing rx interface"); + if (hw_if_index == ~0) + return clib_error_return (0, "missing hw interface"); + + u32 t_index = vnet_gtpu_get_tunnel_index (rx_sw_if_index);; + if (t_index == ~0) + return clib_error_return (0, "%U is not a gtpu tunnel", + format_vnet_sw_if_index_name, vnm, + rx_sw_if_index); + + gtpu_main_t *gtm = >pu_main; + gtpu_tunnel_t *t = pool_elt_at_index (gtm->tunnels, t_index); + + /* first support ipv4 hw offload */ + if (!ip46_address_is_ip4 (&t->dst)) + return clib_error_return (0, "currently only IPV4 tunnels are supported"); + + /* inner protocol should be IPv4 */ + if (t->decap_next_index != GTPU_INPUT_NEXT_IP4_INPUT) + return clib_error_return (0, + "currently only inner IPV4 protocol is supported"); + + vnet_hw_interface_t *hw_if = vnet_get_hw_interface (vnm, hw_if_index); + ip4_main_t *im = &ip4_main; + u32 rx_fib_index = + vec_elt (im->fib_index_by_sw_if_index, hw_if->sw_if_index); + + if (t->encap_fib_index != rx_fib_index) + return clib_error_return (0, "interface/tunnel fib mismatch"); + + if (vnet_gtpu_add_del_rx_flow (hw_if_index, t_index, is_add)) + return clib_error_return (0, "error %s flow", + is_add ? "enabling" : "disabling"); + + return 0; +} + + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (gtpu_offload_command, static) = { + .path = "set flow-offload gtpu", + .short_help = + "set flow-offload gtpu hw <inerface-name> rx <tunnel-name> [del]", + .function = gtpu_offload_command_fn, +}; +/* *INDENT-ON* */ + clib_error_t * gtpu_init (vlib_main_t * vm) { @@ -1101,6 +1236,9 @@ gtpu_init (vlib_main_t * vm) gtm->vnet_main = vnet_get_main (); gtm->vlib_main = vm; + vnet_flow_get_range (gtm->vnet_main, "gtpu", 1024 * 1024, + >m->flow_id_start); + /* initialize the ip6 hash */ gtm->gtpu6_tunnel_by_key = hash_create_mem (0, sizeof (gtpu6_tunnel_key_t), diff --git a/src/plugins/gtpu/gtpu.h b/src/plugins/gtpu/gtpu.h index dc36308d8a8..1d47f2d1b93 100644 --- a/src/plugins/gtpu/gtpu.h +++ b/src/plugins/gtpu/gtpu.h @@ -81,7 +81,7 @@ typedef CLIB_PACKED(struct { ip4_header_t ip4; /* 20 bytes */ udp_header_t udp; /* 8 bytes */ - gtpu_header_t gtpu; /* 8 bytes */ + gtpu_header_t gtpu; /* 12 bytes */ }) ip4_gtpu_header_t; /* *INDENT-ON* */ @@ -173,6 +173,8 @@ typedef struct * The tunnels sibling index on the FIB entry's dependency list. */ u32 sibling_index; + + u32 flow_index; /* infra flow index */ } gtpu_tunnel_t; #define foreach_gtpu_input_next \ @@ -231,6 +233,7 @@ typedef struct /* convenience */ vlib_main_t *vlib_main; vnet_main_t *vnet_main; + u32 flow_id_start; } gtpu_main_t; extern gtpu_main_t gtpu_main; @@ -239,6 +242,7 @@ extern vlib_node_registration_t gtpu4_input_node; extern vlib_node_registration_t gtpu6_input_node; extern vlib_node_registration_t gtpu4_encap_node; extern vlib_node_registration_t gtpu6_encap_node; +extern vlib_node_registration_t gtpu4_flow_input_node; u8 *format_gtpu_encap_trace (u8 * s, va_list * args); @@ -262,6 +266,9 @@ typedef struct } 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); + #endif /* included_vnet_gtpu_h */ diff --git a/src/plugins/gtpu/gtpu_api.c b/src/plugins/gtpu/gtpu_api.c index 0c4a31521bb..50eb0a129f5 100644 --- a/src/plugins/gtpu/gtpu_api.c +++ b/src/plugins/gtpu/gtpu_api.c @@ -35,6 +35,65 @@ #include <vlibapi/api_helper_macros.h> static void +vl_api_gtpu_offload_rx_t_handler (vl_api_gtpu_offload_rx_t * mp) +{ + vl_api_gtpu_offload_rx_reply_t *rmp; + int rv = 0; + vl_api_interface_index_t hw_if_index = ntohl (mp->hw_if_index); + vl_api_interface_index_t sw_if_index = ntohl (mp->sw_if_index); + + if (!vnet_hw_interface_is_valid (vnet_get_main (), hw_if_index)) + { + rv = VNET_API_ERROR_NO_SUCH_ENTRY; + goto err; + } + VALIDATE_SW_IF_INDEX (mp); + + u32 t_index = vnet_gtpu_get_tunnel_index (sw_if_index); + if (t_index == ~0) + { + rv = VNET_API_ERROR_INVALID_SW_IF_INDEX_2; + goto err; + } + + gtpu_main_t *gtm = >pu_main; + gtpu_tunnel_t *t = pool_elt_at_index (gtm->tunnels, t_index); + if (!ip46_address_is_ip4 (&t->dst)) + { + rv = VNET_API_ERROR_INVALID_ADDRESS_FAMILY; + goto err; + } + + if (t->decap_next_index != GTPU_INPUT_NEXT_IP4_INPUT) + { + rv = VNET_API_ERROR_INVALID_ADDRESS_FAMILY; + goto err; + } + + vnet_main_t *vnm = vnet_get_main (); + vnet_hw_interface_t *hw_if = vnet_get_hw_interface (vnm, hw_if_index); + ip4_main_t *im = &ip4_main; + u32 rx_fib_index = + vec_elt (im->fib_index_by_sw_if_index, hw_if->sw_if_index); + + if (t->encap_fib_index != rx_fib_index) + { + rv = VNET_API_ERROR_NO_SUCH_FIB; + goto err; + } + + if (vnet_gtpu_add_del_rx_flow (hw_if_index, t_index, mp->enable)) + { + rv = VNET_API_ERROR_UNSPECIFIED; + goto err; + } + BAD_SW_IF_INDEX_LABEL; +err: + + REPLY_MACRO (VL_API_GTPU_OFFLOAD_RX_REPLY); +} + +static void vl_api_sw_interface_set_gtpu_bypass_t_handler (vl_api_sw_interface_set_gtpu_bypass_t * mp) { diff --git a/src/plugins/gtpu/gtpu_decap.c b/src/plugins/gtpu/gtpu_decap.c index 1398ebdb88f..99af7300025 100644 --- a/src/plugins/gtpu/gtpu_decap.c +++ b/src/plugins/gtpu/gtpu_decap.c @@ -1242,4 +1242,508 @@ clib_error_t * ip6_gtpu_bypass_init (vlib_main_t * vm) { return 0; } VLIB_INIT_FUNCTION (ip6_gtpu_bypass_init); + +#define foreach_gtpu_flow_error \ + _(NONE, "no error") \ + _(IP_CHECKSUM_ERROR, "Rx ip checksum errors") \ + _(IP_HEADER_ERROR, "Rx ip header errors") \ + _(UDP_CHECKSUM_ERROR, "Rx udp checksum errors") \ + _(UDP_LENGTH_ERROR, "Rx udp length errors") + +typedef enum +{ +#define _(f,s) GTPU_FLOW_ERROR_##f, + foreach_gtpu_flow_error +#undef _ +#define gtpu_error(n,s) GTPU_FLOW_ERROR_##n, +#include <gtpu/gtpu_error.def> +#undef gtpu_error + GTPU_FLOW_N_ERROR, +} gtpu_flow_error_t; + +static char *gtpu_flow_error_strings[] = { +#define _(n,s) s, + foreach_gtpu_flow_error +#undef _ +#define gtpu_error(n,s) s, +#include <gtpu/gtpu_error.def> +#undef gtpu_error +#undef _ + +}; + +#define gtpu_local_need_csum_check(_b) \ + (!(_b->flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED \ + || _b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)) + +#define gtpu_local_csum_is_valid(_b) \ + ((_b->flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT \ + || _b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM) != 0) + +static_always_inline u8 +gtpu_validate_udp_csum (vlib_main_t * vm, vlib_buffer_t *b) +{ + u32 flags = b->flags; + enum { offset = sizeof(ip4_header_t) + sizeof(udp_header_t)}; + + /* Verify UDP checksum */ + if ((flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0) + { + vlib_buffer_advance (b, -offset); + flags = ip4_tcp_udp_validate_checksum (vm, b); + vlib_buffer_advance (b, offset); + } + + return (flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; +} + +static_always_inline u8 +gtpu_check_ip (vlib_buffer_t *b, u16 payload_len) +{ + ip4_header_t * ip4_hdr = vlib_buffer_get_current(b) - + sizeof(ip4_header_t) - sizeof(udp_header_t); + u16 ip_len = clib_net_to_host_u16 (ip4_hdr->length); + u16 expected = payload_len + sizeof(ip4_header_t) + sizeof(udp_header_t); + return ip_len > expected || ip4_hdr->ttl == 0 || ip4_hdr->ip_version_and_header_length != 0x45; +} + +static_always_inline u8 +gtpu_check_ip_udp_len (vlib_buffer_t *b) +{ + ip4_header_t * ip4_hdr = vlib_buffer_get_current(b) - + sizeof(ip4_header_t) - sizeof(udp_header_t); + udp_header_t * udp_hdr = vlib_buffer_get_current(b) - sizeof(udp_header_t); + u16 ip_len = clib_net_to_host_u16 (ip4_hdr->length); + u16 udp_len = clib_net_to_host_u16 (udp_hdr->length); + return udp_len > ip_len; +} + +static_always_inline u8 +gtpu_err_code (u8 ip_err0, u8 udp_err0, u8 csum_err0) +{ + u8 error0 = GTPU_FLOW_ERROR_NONE; + if (ip_err0) + error0 = GTPU_FLOW_ERROR_IP_HEADER_ERROR; + if (udp_err0) + error0 = GTPU_FLOW_ERROR_UDP_LENGTH_ERROR; + if (csum_err0) + error0 = GTPU_FLOW_ERROR_UDP_CHECKSUM_ERROR; + return error0; +} + + +always_inline uword +gtpu_flow_input (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + u32 n_left_from, next_index, * from, * to_next; + gtpu_main_t * gtm = >pu_main; + vnet_main_t * vnm = gtm->vnet_main; + vnet_interface_main_t * im = &vnm->interface_main; + u32 pkts_decapsulated = 0; + u32 thread_index = vlib_get_thread_index(); + u32 stats_sw_if_index, stats_n_packets, stats_n_bytes; + u8 ip_err0, ip_err1, udp_err0, udp_err1, csum_err0, csum_err1; + + from = vlib_frame_vector_args (from_frame); + n_left_from = from_frame->n_vectors; + + next_index = node->cached_next_index; + stats_sw_if_index = node->runtime_data[0]; + stats_n_packets = stats_n_bytes = 0; + + while (n_left_from > 0) + { + u32 n_left_to_next; + + vlib_get_next_frame (vm, node, next_index, + to_next, n_left_to_next); + + while (n_left_from >= 4 && n_left_to_next >= 2) + { + u32 bi0, bi1; + vlib_buffer_t * b0, * b1; + u32 next0, next1; + gtpu_header_t * gtpu0, * gtpu1; + u32 gtpu_hdr_len0, gtpu_hdr_len1; + u32 tunnel_index0, tunnel_index1; + gtpu_tunnel_t * t0, * t1; + u32 error0, error1; + u32 sw_if_index0, sw_if_index1, len0, len1; + u8 has_space0 = 0, has_space1 = 0; + u8 ver0, ver1; + + /* Prefetch next iteration. */ + { + vlib_buffer_t * p2, * p3; + + p2 = vlib_get_buffer (vm, from[2]); + p3 = vlib_get_buffer (vm, from[3]); + + vlib_prefetch_buffer_header (p2, LOAD); + vlib_prefetch_buffer_header (p3, LOAD); + + CLIB_PREFETCH (p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD); + } + + bi0 = from[0]; + bi1 = from[1]; + to_next[0] = bi0; + to_next[1] = bi1; + from += 2; + to_next += 2; + n_left_to_next -= 2; + n_left_from -= 2; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + + /* udp leaves current_data pointing at the gtpu header */ + gtpu0 = vlib_buffer_get_current (b0); + gtpu1 = vlib_buffer_get_current (b1); + + len0 = vlib_buffer_length_in_chain (vm, b0); + len1 = vlib_buffer_length_in_chain (vm, b1); + + tunnel_index0 = ~0; + error0 = 0; + + tunnel_index1 = ~0; + error1 = 0; + + ip_err0 = gtpu_check_ip (b0, len0); + udp_err0 = gtpu_check_ip_udp_len (b0); + ip_err1 = gtpu_check_ip (b1, len1); + udp_err1 = gtpu_check_ip_udp_len (b1); + + if (PREDICT_FALSE (gtpu_local_need_csum_check (b0))) + csum_err0 = !gtpu_validate_udp_csum (vm, b0); + else + csum_err0 = !gtpu_local_csum_is_valid (b0); + if (PREDICT_FALSE (gtpu_local_need_csum_check (b1))) + csum_err1 = !gtpu_validate_udp_csum (vm, b1); + else + csum_err1 = !gtpu_local_csum_is_valid (b1); + + 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); + + next0 = GTPU_INPUT_NEXT_IP4_INPUT; + sw_if_index0 = t0->sw_if_index; + + /* Set packet input sw_if_index to unicast GTPU tunnel for learning */ + vnet_buffer(b0)->sw_if_index[VLIB_RX] = sw_if_index0; + + pkts_decapsulated ++; + stats_n_packets += 1; + stats_n_bytes += len0; + + /* Batch stats increment on the same gtpu tunnel so counter + is not incremented per packet */ + if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index)) + { + stats_n_packets -= 1; + stats_n_bytes -= len0; + if (stats_n_packets) + vlib_increment_combined_counter + (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, + thread_index, stats_sw_if_index, + stats_n_packets, stats_n_bytes); + stats_n_packets = 1; + stats_n_bytes = len0; + stats_sw_if_index = sw_if_index0; + } + +trace0: + b0->error = error0 ? node->errors[error0] : 0; + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + gtpu_rx_trace_t *tr + = vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->next_index = next0; + tr->error = error0; + tr->tunnel_index = tunnel_index0; + tr->teid = has_space0 ? clib_net_to_host_u32(gtpu0->teid) : ~0; + } + + if (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 + */ + 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; + } + + /* 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); + + next1 = GTPU_INPUT_NEXT_IP4_INPUT; + sw_if_index1 = t1->sw_if_index; + + /* Required to make the l2 tag push / pop code work on l2 subifs */ + /* This won't happen in current implementation as only + ipv4/udp/gtpu/IPV4 type packets can be matched */ + if (PREDICT_FALSE(next1 == GTPU_INPUT_NEXT_L2_INPUT)) + vnet_update_l2_len (b1); + + /* Set packet input sw_if_index to unicast GTPU tunnel for learning */ + vnet_buffer(b1)->sw_if_index[VLIB_RX] = sw_if_index1; + + pkts_decapsulated ++; + stats_n_packets += 1; + stats_n_bytes += len1; + + /* Batch stats increment on the same gtpu tunnel so counter + is not incremented per packet */ + if (PREDICT_FALSE (sw_if_index1 != stats_sw_if_index)) + { + stats_n_packets -= 1; + stats_n_bytes -= len1; + if (stats_n_packets) + vlib_increment_combined_counter + (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, + thread_index, stats_sw_if_index, + stats_n_packets, stats_n_bytes); + stats_n_packets = 1; + stats_n_bytes = len1; + stats_sw_if_index = sw_if_index1; + } + +trace1: + b1->error = error1 ? node->errors[error1] : 0; + + if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED)) + { + gtpu_rx_trace_t *tr + = vlib_add_trace (vm, node, b1, sizeof (*tr)); + tr->next_index = next1; + tr->error = error1; + tr->tunnel_index = tunnel_index1; + tr->teid = has_space1 ? clib_net_to_host_u32(gtpu1->teid) : ~0; + } + + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, next1); + } + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t * b0; + u32 next0; + gtpu_header_t * gtpu0; + u32 gtpu_hdr_len0; + u32 error0; + u32 tunnel_index0; + gtpu_tunnel_t * t0; + u32 sw_if_index0, len0; + u8 has_space0 = 0; + u8 ver0; + + 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; + } + + /* udp leaves current_data pointing at the gtpu header */ + gtpu0 = vlib_buffer_get_current (b0); + + /* speculatively load gtp header version field */ + ver0 = gtpu0->ver_flags; + + /* + * Manipulate gtpu header + * TBD: Manipulate Sequence Number and N-PDU Number + * TBD: Manipulate Next Extension Header + */ + 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 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); + + next0 = GTPU_INPUT_NEXT_IP4_INPUT; + sw_if_index0 = t0->sw_if_index; + + /* Set packet input sw_if_index to unicast GTPU tunnel for learning */ + vnet_buffer(b0)->sw_if_index[VLIB_RX] = sw_if_index0; + + pkts_decapsulated ++; + stats_n_packets += 1; + stats_n_bytes += len0; + + /* Batch stats increment on the same gtpu tunnel so counter + is not incremented per packet */ + if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index)) + { + stats_n_packets -= 1; + stats_n_bytes -= len0; + if (stats_n_packets) + vlib_increment_combined_counter + (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, + thread_index, stats_sw_if_index, + stats_n_packets, stats_n_bytes); + stats_n_packets = 1; + stats_n_bytes = len0; + stats_sw_if_index = sw_if_index0; + } + trace00: + b0->error = error0 ? node->errors[error0] : 0; + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + gtpu_rx_trace_t *tr + = vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->next_index = next0; + tr->error = error0; + tr->tunnel_index = tunnel_index0; + tr->teid = has_space0 ? clib_net_to_host_u32(gtpu0->teid) : ~0; + } + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, + to_next, n_left_to_next, + bi0, next0); + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + /* Do we still need this now that tunnel tx stats is kept? */ + vlib_node_increment_counter (vm, gtpu4_flow_input_node.index, + GTPU_ERROR_DECAPSULATED, + pkts_decapsulated); + + /* Increment any remaining batch stats */ + if (stats_n_packets) + { + vlib_increment_combined_counter + (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, + thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes); + node->runtime_data[0] = stats_sw_if_index; + } + + return from_frame->n_vectors; +} + +VLIB_NODE_FN (gtpu4_flow_input_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + return gtpu_flow_input(vm, node, from_frame); +} + + +/* *INDENT-OFF* */ +#ifndef CLIB_MULTIARCH_VARIANT +VLIB_REGISTER_NODE (gtpu4_flow_input_node) = { + .name = "gtpu4-flow-input", + .type = VLIB_NODE_TYPE_INTERNAL, + .vector_size = sizeof (u32), + + .format_trace = format_gtpu_rx_trace, + + .n_errors = GTPU_FLOW_N_ERROR, + .error_strings = gtpu_flow_error_strings, + + .n_next_nodes = GTPU_INPUT_N_NEXT, + .next_nodes = { +#define _(s,n) [GTPU_INPUT_NEXT_##s] = n, + foreach_gtpu_input_next +#undef _ + + }, +}; +#endif +/* *INDENT-ON* */ + #endif /* CLIB_MARCH_VARIANT */ diff --git a/src/plugins/gtpu/gtpu_test.c b/src/plugins/gtpu/gtpu_test.c index 55c5363becc..c780bd77d85 100644 --- a/src/plugins/gtpu/gtpu_test.c +++ b/src/plugins/gtpu/gtpu_test.c @@ -107,6 +107,12 @@ api_unformat_sw_if_index (unformat_input_t * input, va_list * args) return 1; } +static uword +api_unformat_hw_if_index (unformat_input_t * input, va_list * args) +{ + return 0; +} + static int api_sw_interface_set_gtpu_bypass (vat_main_t * vam) { @@ -174,6 +180,58 @@ static uword unformat_gtpu_decap_next } static int +api_gtpu_offload_rx (vat_main_t * vam) +{ + unformat_input_t *line_input = vam->input; + vl_api_gtpu_offload_rx_t *mp; + u32 rx_sw_if_index = ~0; + u32 hw_if_index = ~0; + int is_add = 1; + int ret; + + while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (line_input, "hw %U", api_unformat_hw_if_index, vam, &hw_if_index)) + ; + else + if (unformat (line_input, "rx %U", api_unformat_sw_if_index, vam, &rx_sw_if_index)) + ; + else + if (unformat (line_input, "del")) + { + is_add = 0; + continue; + } + else + { + errmsg ("parse error '%U'", format_unformat_error, line_input); + return -99; + } + } + + if (rx_sw_if_index == ~0) + { + errmsg ("missing rx interface"); + return -99; + } + + if (hw_if_index == ~0) + { + errmsg ("missing hw interface"); + return -99; + } + + M (GTPU_OFFLOAD_RX, mp); + mp->hw_if_index = ntohl (hw_if_index); + mp->sw_if_index = ntohl (rx_sw_if_index); + mp->enable = is_add; + + S (mp); + W (ret); + return ret; +} + +static int api_gtpu_add_del_tunnel (vat_main_t * vam) { unformat_input_t *line_input = vam->input; |