diff options
Diffstat (limited to 'build-root/emacs-lisp')
| -rw-r--r-- | build-root/emacs-lisp/all-skel.el | 11 | ||||
| -rw-r--r-- | build-root/emacs-lisp/cli-cmd-skel.el | 32 | ||||
| -rw-r--r-- | build-root/emacs-lisp/config-skel.el | 28 | ||||
| -rw-r--r-- | build-root/emacs-lisp/dual-loop-skel.el | 290 | ||||
| -rw-r--r-- | build-root/emacs-lisp/periodic-skel.el | 86 | ||||
| -rw-r--r-- | build-root/emacs-lisp/pipe-skel.el | 132 | ||||
| -rw-r--r-- | build-root/emacs-lisp/tunnel-c-skel.el | 441 | ||||
| -rw-r--r-- | build-root/emacs-lisp/tunnel-decap-skel.el | 299 | ||||
| -rw-r--r-- | build-root/emacs-lisp/tunnel-encap-skel.el | 245 | ||||
| -rw-r--r-- | build-root/emacs-lisp/tunnel-h-skel.el | 128 |
10 files changed, 1692 insertions, 0 deletions
diff --git a/build-root/emacs-lisp/all-skel.el b/build-root/emacs-lisp/all-skel.el new file mode 100644 index 00000000..afc2d37f --- /dev/null +++ b/build-root/emacs-lisp/all-skel.el @@ -0,0 +1,11 @@ +;; list of clib / vlib / vnet / vpp skeleton files + +(load-file "./cli-cmd-skel.el") +(load-file "./pipe-skel.el") +(load-file "./dual-loop-skel.el") +(load-file "./periodic-skel.el") +(load-file "./config-skel.el") +(load-file "./tunnel-c-skel.el") +(load-file "./tunnel-h-skel.el") +(load-file "./tunnel-encap-skel.el") +(load-file "./tunnel-decap-skel.el") diff --git a/build-root/emacs-lisp/cli-cmd-skel.el b/build-root/emacs-lisp/cli-cmd-skel.el new file mode 100644 index 00000000..8a83cd1f --- /dev/null +++ b/build-root/emacs-lisp/cli-cmd-skel.el @@ -0,0 +1,32 @@ +;;; cli-cmd-skel.el - cli command skeleton + +(require 'skeleton) + +(define-skeleton cli-cmd-skel +"Insert a CLI command " +nil +'(setq cmd-name (skeleton-read "Command Name: ")) +'(setq path (skeleton-read "Path: ")) + +" +static clib_error_t * +" cmd-name "_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { + if (unformat (input, \"whatever %d\", &whatever)) + ; + else + return clib_error_return (0, \"unknown input `%U'\", + format_unformat_error, input); + } + return 0; +} + +VLIB_CLI_COMMAND (" cmd-name "_command, static) = { + .path = \"" path "\", + .short_help = \"" path "\", + .function = " cmd-name "_command_fn, +}; +") diff --git a/build-root/emacs-lisp/config-skel.el b/build-root/emacs-lisp/config-skel.el new file mode 100644 index 00000000..c9a1eb6c --- /dev/null +++ b/build-root/emacs-lisp/config-skel.el @@ -0,0 +1,28 @@ +;;; config-skel.el - config function command skeleton + +(require 'skeleton) + +(define-skeleton config-skel +"Insert a vlib config skeleton " +nil +'(setq cfg-name (skeleton-read "Config Class Name: ")) + +" +static clib_error_t * +" cfg-name "_config (vlib_main_t * vm, unformat_input_t * input) +{ + u32 whatever; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { + if (unformat (input, \"whatever %d\", &whatever)) + ; + else + return clib_error_return (0, \"unknown input `%U'\", + format_unformat_error, input); + } + + return 0; +} + +VLIB_CONFIG_FUNCTION (" cfg-name "_config, \"" cfg-name "\"); +") diff --git a/build-root/emacs-lisp/dual-loop-skel.el b/build-root/emacs-lisp/dual-loop-skel.el new file mode 100644 index 00000000..fafd21ae --- /dev/null +++ b/build-root/emacs-lisp/dual-loop-skel.el @@ -0,0 +1,290 @@ +;;; dual-loop-skel.el - Eliotic dual-loop node skeleton + +(require 'skeleton) + +(define-skeleton dual-loop-skel +"Insert a skeleton dual-loop graph node" +nil +'(setq node-name (skeleton-read "Node Name: ")) +'(setq uc-node-name (upcase node-name)) +" +#include <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vnet/pg/pg.h> +#include <clib/error.h> + +#include <vnet/ip/ip.h> +#include <vnet/ethernet/ethernet.h> + +#include <clib/hash.h> +#include <clib/error.h> +#include <clib/elog.h> + +typedef struct { + /* convenience */ + vlib_main_t * vlib_main; + vnet_main_t * vnet_main; + ethernet_main_t * ethernet_main; +} " node-name "_main_t; + +" node-name "_main_t " node-name "_main; + +vlib_node_registration_t " node-name "_node; + +typedef struct { + u32 next_index; + u32 sw_if_index; +} " node-name "_trace_t; + +/* packet trace format function */ +static u8 * format_" node-name "_trace (u8 * s, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + " node-name "_trace_t * t = va_arg (*args, " node-name "_trace_t *); + + s = format (s, \"" uc-node-name ": sw_if_index %d, next index %d\", + t->sw_if_index, t->next_index); + return s; +} + +vlib_node_registration_t " node-name "_node; + +#define foreach_" node-name "_error \\ +_(SWAPPED, \"Mac swap packets processed\") + +typedef enum { +#define _(sym,str) " uc-node-name "_ERROR_##sym, + foreach_" node-name "_error +#undef _ + " uc-node-name "_N_ERROR, +} " node-name "_error_t; + +static char * " node-name "_error_strings[] = { +#define _(sym,string) string, + foreach_" node-name "_error +#undef _ +}; + +typedef enum { + " uc-node-name "_NEXT_INTERFACE_OUTPUT, + " uc-node-name "_N_NEXT, +} " node-name "_next_t; + +#define foreach_mac_address_offset \\ +_(0) \\ +_(1) \\ +_(2) \\ +_(3) \\ +_(4) \\ +_(5) + +static uword +" node-name "_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + u32 n_left_from, * from, * to_next; + " node-name "_next_t next_index; + u32 pkts_swapped = 0; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + 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 next0 = " uc-node-name "_NEXT_INTERFACE_OUTPUT; + u32 next1 = " uc-node-name "_NEXT_INTERFACE_OUTPUT; + u32 sw_if_index0, sw_if_index1; + u8 tmp0[6], tmp1[6]; + ethernet_header_t *en0, *en1; + u32 bi0, bi1; + vlib_buffer_t * b0, * b1; + + /* 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, CLIB_CACHE_LINE_BYTES, STORE); + CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); + } + + /* speculatively enqueue b0 and b1 to the current next frame */ + to_next[0] = bi0 = from[0]; + to_next[1] = bi1 = from[1]; + from += 2; + to_next += 2; + n_left_from -= 2; + n_left_to_next -= 2; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + + /* $$$$$ Dual loop: process 2 x packets here $$$$$ */ + ASSERT (b0->current_data == 0); + ASSERT (b1->current_data == 0); + + en0 = vlib_buffer_get_current (b0); + en1 = vlib_buffer_get_current (b1); + + /* This is not the fastest way to swap src + dst mac addresses */ +#define _(a) tmp0[a] = en0->src_address[a]; + foreach_mac_address_offset; +#undef _ +#define _(a) en0->src_address[a] = en0->dst_address[a]; + foreach_mac_address_offset; +#undef _ +#define _(a) en0->dst_address[a] = tmp0[a]; + foreach_mac_address_offset; +#undef _ + +#define _(a) tmp1[a] = en1->src_address[a]; + foreach_mac_address_offset; +#undef _ +#define _(a) en1->src_address[a] = en1->dst_address[a]; + foreach_mac_address_offset; +#undef _ +#define _(a) en1->dst_address[a] = tmp1[a]; + foreach_mac_address_offset; +#undef _ + + sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX]; + + /* Send pkt back out the RX interface */ + vnet_buffer(b0)->sw_if_index[VLIB_TX] = sw_if_index0; + vnet_buffer(b1)->sw_if_index[VLIB_TX] = sw_if_index1; + + pkts_swapped += 2; + /* $$$$$ End of processing 2 x packets $$$$$ */ + + if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE))) + { + if (b0->flags & VLIB_BUFFER_IS_TRACED) + { + " node-name "_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + } + if (b1->flags & VLIB_BUFFER_IS_TRACED) + { + " node-name "_trace_t *t = + vlib_add_trace (vm, node, b1, sizeof (*t)); + t->sw_if_index = sw_if_index1; + t->next_index = next1; + } + } + + /* verify speculative enqueues, maybe switch current next frame */ + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, next1); + } + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t * b0; + u32 next0 = " uc-node-name "_NEXT_INTERFACE_OUTPUT; + u32 sw_if_index0; + u8 tmp0[6]; + ethernet_header_t *en0; + + /* speculatively enqueue b0 to the current next frame */ + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + + b0 = vlib_get_buffer (vm, bi0); + + /* $$$$$ Single loop: process 1 packet here $$$$$ */ + + /* + * Direct from the driver, we should be at offset 0 + * aka at &b0->data[0] + */ + ASSERT (b0->current_data == 0); + + en0 = vlib_buffer_get_current (b0); + + /* This is not the fastest way to swap src + dst mac addresses */ +#define _(a) tmp0[a] = en0->src_address[a]; + foreach_mac_address_offset; +#undef _ +#define _(a) en0->src_address[a] = en0->dst_address[a]; + foreach_mac_address_offset; +#undef _ +#define _(a) en0->dst_address[a] = tmp0[a]; + foreach_mac_address_offset; +#undef _ + + sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + + /* Send pkt back out the RX interface */ + vnet_buffer(b0)->sw_if_index[VLIB_TX] = sw_if_index0; + + if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + " node-name "_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + } + + pkts_swapped += 1; + + /* $$$$$ Done processing 1 packet here $$$$$ */ + + /* verify speculative enqueue, maybe switch current next frame */ + 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); + } + + vlib_node_increment_counter (vm, " node-name "_node.index, + " uc-node-name "_ERROR_SWAPPED, pkts_swapped); + return frame->n_vectors; +} + +VLIB_REGISTER_NODE (" node-name "_node) = { + .function = " node-name "_node_fn, + .name = \"" node-name "\", + .vector_size = sizeof (u32), + .format_trace = format_" node-name "_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(" node-name "_error_strings), + .error_strings = " node-name "_error_strings, + + .n_next_nodes = " uc-node-name "_N_NEXT, + + /* edit / add dispositions here */ + .next_nodes = { + [" uc-node-name "_NEXT_INTERFACE_OUTPUT] = \"interface-output\", + }, +}; + +") + diff --git a/build-root/emacs-lisp/periodic-skel.el b/build-root/emacs-lisp/periodic-skel.el new file mode 100644 index 00000000..37c20856 --- /dev/null +++ b/build-root/emacs-lisp/periodic-skel.el @@ -0,0 +1,86 @@ +;;; pipe-skel.el - pipelined graph node skeleton + +(require 'skeleton) + +(define-skeleton periodic-skel +"Insert a skeleton periodic process node" +nil +'(setq node-name (skeleton-read "Name: ")) +'(setq uc-node-name (upcase node-name)) +'(setq poll-period (skeleton-read "Poll period (f64 seconds, e.g. 10.0): ")) + +" +#define " uc-node-name "_POLL_PERIOD " poll-period " + +static uword +" node-name "_process (vlib_main_t * vm, + vlib_node_runtime_t * rt, + vlib_frame_t * f) +{ + f64 poll_time_remaining; + uword event_type, * event_data = 0; + + poll_time_remaining = " uc-node-name "_POLL_PERIOD; + while (1) { + int i; + + /* + * Sleep until next periodic call due, or until we receive event(s) + */ + poll_time_remaining = + vlib_process_wait_for_event_or_clock (vm, poll_time_remaining); + + event_type = vlib_process_get_events (vm, &event_data); + switch (event_type) { + case ~0: /* no events => timeout */ + break; + + /* + * $$$$ FIXME: add cases / handlers for each event type + */ + case EVENT1: + for (i = 0; i < vec_len (event_data); i++) + handle_event1 (mm, event_data[i]); + break; + + case EVENT2: + for (i = 0; i < vec_len (event_data); i++) + handle_event2 (vm, event_data[i]); + break; + + /* ... and so forth for each event type */ + + default: + /* This should never happen... */ + clib_warning (\"BUG: unhandled event type %d\", event_type); + break; + } + if (event_data) + _vec_len (event_data) = 0; + + /* Timer expired, call periodic function */ + if (vlib_process_suspend_time_is_zero (poll_time_remaining)) { + " node-name "_periodic (vm); + poll_time_remaining = " uc-node-name "_POLL_PERIOD; + } + } + + return 0; +} + +/* + * " node-name " periodic node declaration + */ +static VLIB_REGISTER_NODE (" node-name "_node) = { + .function = " node-name "_process, + .type = VLIB_NODE_TYPE_PROCESS, + .name = \"" node-name "-process\", +}; + +/* + * To signal an event: + * + * vlib_process_signal_event (vm, " node-name "_node.index, EVENTn, datum); + * + */ +") diff --git a/build-root/emacs-lisp/pipe-skel.el b/build-root/emacs-lisp/pipe-skel.el new file mode 100644 index 00000000..8ad25c04 --- /dev/null +++ b/build-root/emacs-lisp/pipe-skel.el @@ -0,0 +1,132 @@ +;;; pipe-skel.el - pipelined graph node skeleton + +(require 'skeleton) + +(define-skeleton pipeline-node-skel +"Insert a skeleton pipelined graph node" +nil +'(setq node-name (skeleton-read "Node Name: ")) +'(setq uc-node-name (upcase node-name)) +'(setq nstages (skeleton-read "Number of pipeline stages: ")) +" +#include <vlib/vlib.h> +#include <clib/error.h> + +/* + * Dump these counters via the \"show error\" CLI command + * FIXME: Add packet counter / error strings as desired + */ + +#define foreach_" node-name "_error \\ +_(ERROR1, \"sample counter/ error string\") + +static char * " node-name "_error_strings[] = { +#define _(sym,string) string, + foreach_" node-name "_error +#undef _ +}; + +/* + * packet error / counter enumeration + * + * To count and drop a vlib_buffer_t *b: + * + * Set b->error = node->errors[" uc-node-name "_ERROR_xxx]; + * last_stage returns a disposition index bound to \"error-drop\" + * + * To manually increment the specific counter " uc-node-name "_ERROR1 + * + * vlib_node_t *n = vlib_get_node (vm, " node-name ".index); + * u32 node_counter_base_index = n->error_heap_index; + * vlib_error_main_t * em = &vm->error_main; + * em->counters[node_counter_base_index + " uc-node-name "_ERROR1] += 1; + * + */ + +typedef enum { +#define _(sym,str) " uc-node-name "_ERROR_##sym, + foreach_" node-name "_error +#undef _ + " uc-node-name "_N_ERROR, +} " node-name "_error_t; + +/* + * enumeration of per-packet dispositions + * FIXME: add dispositions as desired + */ + +typedef enum { \n" +" " uc-node-name "_NEXT_NORMAL,\n" +" " uc-node-name "_N_NEXT, +} " node-name "_next_t; + +#define NSTAGES " nstages " + +/* + * Use the generic buffer metadata + first line of packet data prefetch + * stage function from <api/pipeline.h>. This is usually a Good Idea. + */ +#define stage0 generic_stage0 + +/* + * FIXME: add stage functions. Here is the function prototype: + * + * static inline void stageN (vlib_main_t * vm, + * vlib_node_runtime_t * node, + * u32 buffer_index) + */ + +/* + * FIXME: the last pipeline stage returns the desired pkt next node index, + * from the " node-name "_next_t enum above + */ +static inline u32 last_stage (vlib_main_t *vm, vlib_node_runtime_t *node, + u32 bi) +{ + vlib_buffer_t *b = vlib_get_buffer (vm, bi); + + b->error = node->errors[EXAMPLE_ERROR_ERROR1]; + + return " uc-node-name "_NEXT_NORMAL; +} + +#include <api/pipeline.h> + +static uword " node-name "_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return dispatch_pipeline (vm, node, frame); +} + +static VLIB_REGISTER_NODE (example_node) = { + .function = " node-name "_node_fn, + .name = \"" node-name "-node\", + .vector_size = sizeof (u32), + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(" node-name "_error_strings), + .error_strings = " node-name "_error_strings, + + .n_next_nodes = " uc-node-name "_N_NEXT, + + /* edit / add dispositions here */ + .next_nodes = { + [" uc-node-name "_NEXT_NORMAL] = \"error-drop\", + }, +}; + +/* + * packet generator definition to push superframes of data into the + * new graph node. Cut and paste into <file>, then + * \"exec <file>\", \"pa enable test\" at the QVNET prompt... + * +packet-generator new { + name test + limit 100 + node " node-name "-node + size 374-374 + data { hex 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 } +} + */ +") diff --git a/build-root/emacs-lisp/tunnel-c-skel.el b/build-root/emacs-lisp/tunnel-c-skel.el new file mode 100644 index 00000000..6f1096ca --- /dev/null +++ b/build-root/emacs-lisp/tunnel-c-skel.el @@ -0,0 +1,441 @@ +;;; tunnel-c-skel.el - tunnel encap cli / api + +(require 'skeleton) + +(define-skeleton tunnel-c-skel +"Insert a tunnel cli/api implementation" +nil +'(setq encap_stack (skeleton-read "encap_stack (e.g ip4_udp_lisp): ")) +'(setq ENCAP_STACK (upcase encap_stack)) +'(setq encap-stack (replace-regexp-in-string "_" "-" encap_stack)) +" +#include <vnet/" encap-stack "/" encap_stack" .h> + +" encap_stack "_main_t " encap_stack "_main; + +static u8 * format_decap_next (u8 * s, va_list * args) +{ + u32 next_index = va_arg (*args, u32); + + switch (next_index) + { + case " ENCAP_STACK "_INPUT_NEXT_DROP: + return format (s, \"drop\"); + case " ENCAP_STACK "_INPUT_NEXT_IP4_INPUT: + return format (s, \"ip4\"); + case " ENCAP_STACK "_INPUT_NEXT_IP6_INPUT: + return format (s, \"ip6\"); + case " ENCAP_STACK "_INPUT_NEXT_" ENCAP_STACK "_ENCAP: + return format (s, \"" encap-stack "\"); + default: + return format (s, \"unknown %d\", next_index); + } + return s; +} + +u8 * format_" encap_stack "_tunnel (u8 * s, va_list * args) +{ + " encap_stack "_tunnel_t * t = va_arg (*args, " encap_stack "_tunnel_t *); + " encap_stack "_main_t * ngm = &" encap_stack "_main; + + s = format (s, + \"[%d] %U (src) %U (dst) fibs: encap %d, decap %d\", + t - ngm->tunnels, + format_ip4_address, &t->src, + format_ip4_address, &t->dst, + t->encap_fib_index, + t->decap_fib_index); + + s = format (s, \" decap next %U\\n\", format_decap_next, t->decap_next_index); + /* FIXME: add protocol details */ + return s; +} + +static u8 * format_" encap_stack "_name (u8 * s, va_list * args) +{ + u32 dev_instance = va_arg (*args, u32); + return format (s, \"" encap_stack "_tunnel%d\", dev_instance); +} + +static uword dummy_interface_tx (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + clib_warning (\"you shouldn't be here, leaking buffers...\"); + return frame->n_vectors; +} + +VNET_DEVICE_CLASS (" encap_stack "_device_class,static) = { + .name = "" ENCAP_STACK "", + .format_device_name = format_" encap_stack "_name, + .format_tx_trace = format_" encap_stack "_encap_trace, + .tx_function = dummy_interface_tx, +}; + +static uword dummy_set_rewrite (vnet_main_t * vnm, + u32 sw_if_index, + u32 l3_type, + void * dst_address, + void * rewrite, + uword max_rewrite_bytes) +{ + return 0; +} + +u8 * format_" encap_stack "_header_with_length (u8 * s, va_list * args) +{ + " encap_stack "_header_t * h = va_arg (*args, " encap_stack "_header_t *); + u32 max_header_bytes = va_arg (*args, u32); + u32 header_bytes; + + header_bytes = sizeof (h[0]); + if (max_header_bytes != 0 && header_bytes > max_header_bytes) + return format (s, \"" encap-stack "header truncated\"); + + /* FIXME: pretty-print an " encap_stack " header */ + + return s; +} + +VNET_HW_INTERFACE_CLASS (" encap_stack "_hw_class) = { + .name = \"" ENCAP_STACK "\", + .format_header = format_" encap_stack "_header_with_length, + .set_rewrite = dummy_set_rewrite, +}; + +#define foreach_copy_field \ +_(src.as_u32) \ +_(dst.as_u32) \ +_(encap_fib_index) \ +_(decap_fib_index) \ +_(decap_next_index) \ +_(FIXME_ADD_ALL_COPY_FIELDS ) + +static int " encap_stack "_rewrite (" encap_stack "_tunnel_t * t) +{ + u8 *rw = 0; + ip4_header_t * ip0; + " encap_stack "_header_t * h0; + int len; + + len = sizeof (*h0); + + vec_validate_aligned (rw, len-1, CLIB_CACHE_LINE_BYTES); + + h0 = (ip4_udp_" encap_stack "_header_t *) rw; + + /* FIXME: build the actual header here... */ + + /* Fixed portion of the (outer) ip4 header */ + ip0 = &h0->ip4; + ip0->ip_version_and_header_length = 0x45; + ip0->ttl = 254; + ip0->protocol = IP_PROTOCOL_UDP; + + /* we'll fix up the ip4 header length and checksum after-the-fact */ + ip0->src_address.as_u32 = t->src.as_u32; + ip0->dst_address.as_u32 = t->dst.as_u32; + ip0->checksum = ip4_header_checksum (ip0); + + /* UDP header, randomize src port on something, maybe? */ + h0->udp.src_port = clib_host_to_net_u16 (4341); + h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_" encap_stack "); + + /* $$$ build a <mumble> tunnel header here */ + + t->rewrite = rw; + return (0); +} + +int vnet_" encap_stack "_add_del_tunnel +(vnet_" encap_stack "_add_del_tunnel_args_t *a, u32 * hw_if_indexp) +{ + " encap_stack "_main_t * ngm = &" encap_stack "_main; + " encap_stack "_tunnel_t *t = 0; + vnet_main_t * vnm = ngm->vnet_main; + vnet_hw_interface_t * hi; + uword * p; + u32 hw_if_index = ~0; + int rv; + " encap_stack "_tunnel_key_t key, *key_copy; + hash_pair_t *hp; + + key.FIXME = clib_host_to_net_XXX(FIXME); + + p = hash_get_mem (ngm->" encap_stack "_tunnel_by_key, &key); + + if (a->is_add) + { + /* adding a tunnel: tunnel must not already exist */ + if (p) + return VNET_API_ERROR_INVALID_VALUE; + + pool_get_aligned (ngm->tunnels, t, CLIB_CACHE_LINE_BYTES); + memset (t, 0, sizeof (*t)); + + /* copy from arg structure */ +#define _(x) t->x = a->x; + foreach_copy_field; +#undef _ + + rv = " encap_stack "_rewrite (t); + + if (rv) + { + pool_put (ngm->tunnels, t); + return rv; + } + + /* $$$$ use a simple hash if you can ... */ + key_copy = clib_mem_alloc (sizeof (*key_copy)); + memcpy (key_copy, &key, sizeof (*key_copy)); + + hash_set_mem (ngm->" encap_stack "_tunnel_by_key, key_copy, + t - ngm->tunnels); + + /* + * interface freelist / recycle shtik + * This simple implementation rapidly reuses freed tunnel interfaces. + * Consider whether to refcount, etc. etc. + */ + if (vec_len (ngm->free_" encap_stack "_tunnel_hw_if_indices) > 0) + { + hw_if_index = ngm->free_" encap_stack "_tunnel_hw_if_indices + [vec_len (ngm->free_" encap_stack "_tunnel_hw_if_indices)-1]; + _vec_len (ngm->free_" encap_stack "_tunnel_hw_if_indices) -= 1; + + hi = vnet_get_hw_interface (vnm, hw_if_index); + hi->dev_instance = t - ngm->tunnels; + hi->hw_instance = hi->dev_instance; + } + else + { + hw_if_index = vnet_register_interface + (vnm, " encap_stack "_device_class.index, t - ngm->tunnels, + " encap_stack "_hw_class.index, t - ngm->tunnels); + hi = vnet_get_hw_interface (vnm, hw_if_index); + hi->output_node_index = " encap_stack "_encap_node.index; + } + + t->hw_if_index = hw_if_index; + + vnet_sw_interface_set_flags (vnm, hi->sw_if_index, + VNET_SW_INTERFACE_FLAG_ADMIN_UP); + } + else + { + /* deleting a tunnel: tunnel must exist */ + if (!p) + return VNET_API_ERROR_NO_SUCH_ENTRY; + + t = pool_elt_at_index (ngm->tunnels, p[0]); + + vnet_sw_interface_set_flags (vnm, t->hw_if_index, 0 /* down */); + vec_add1 (ngm->free_" encap_stack "_tunnel_hw_if_indices, t->hw_if_index); + + hp = hash_get_pair (ngm->" encap_stack "_tunnel_by_key, &key); + key_copy = (void *)(hp->key); + hash_unset_mem (ngm->" encap_stack "_tunnel_by_key, &key); + clib_mem_free (key_copy); + + vec_free (t->rewrite); + pool_put (ngm->tunnels, t); + } + + if (hw_if_indexp) + *hw_if_indexp = hw_if_index; + + return 0; +} + +static u32 fib_index_from_fib_id (u32 fib_id) +{ + ip4_main_t * im = &ip4_main; + uword * p; + + p = hash_get (im->fib_index_by_table_id, fib_id); + if (!p) + return ~0; + + return p[0]; +} + +static uword unformat_decap_next (unformat_input_t * input, va_list * args) +{ + u32 * result = va_arg (*args, u32 *); + u32 tmp; + + if (unformat (input, \"drop\")) + *result = " ENCAP_STACK "_INPUT_NEXT_DROP; + else if (unformat (input, \"ip4\")) + *result = " ENCAP_STACK "_INPUT_NEXT_IP4_INPUT; + else if (unformat (input, \"ip6\")) + *result = " ENCAP_STACK "_INPUT_NEXT_IP6_INPUT; + else if (unformat (input, \"ethernet\")) + *result = " ENCAP_STACK "_INPUT_NEXT_IP6_INPUT; + else if (unformat (input, \"" encap-stack "\")) + *result = " ENCAP_STACK "_INPUT_NEXT_" ENCAP_STACK "_ENCAP; + else if (unformat (input, \"%d\", &tmp)) + *result = tmp; + else + return 0; + return 1; +} + +static clib_error_t * +" encap_stack "_add_del_tunnel_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + unformat_input_t _line_input, * line_input = &_line_input; + ip4_address_t src, dst; + u8 is_add = 1; + u8 src_set = 0; + u8 dst_set = 0; + u32 encap_fib_index = 0; + u32 decap_fib_index = 0; + u8 next_protocol = " ENCAP_STACK "_NEXT_PROTOCOL_IP4; + u32 decap_next_index = " ENCAP_STACK "_INPUT_NEXT_IP4_INPUT; + u8 flags = " ENCAP_STACK "_FLAGS_P; + u8 ver_res = 0; + u8 res = 0; + u32 iid = 0; + u8 iid_set = 0; + u32 tmp; + int rv; + vnet_" encap_stack "_add_del_tunnel_args_t _a, * a = &_a; + + /* Get a line of input. */ + if (! unformat_user (input, unformat_line_input, line_input)) + return 0; + + 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)) + src_set = 1; + else if (unformat (line_input, \"dst %U\", + unformat_ip4_address, &dst)) + dst_set = 1; + else if (unformat (line_input, \"encap-vrf-id %d\", &tmp)) + { + encap_fib_index = fib_index_from_fib_id (tmp); + if (encap_fib_index == ~0) + return clib_error_return (0, \"nonexistent encap fib id %d\", tmp); + } + else if (unformat (line_input, \"decap-vrf-id %d\", &tmp)) + { + decap_fib_index = fib_index_from_fib_id (tmp); + if (decap_fib_index == ~0) + return clib_error_return (0, \"nonexistent decap fib id %d\", tmp); + } + else if (unformat (line_input, \"decap-next %U\", unformat_decap_next, + &decap_next_index)) + ; + else if (unformat(line_input, \"next-ip4\")) + next_protocol = 1; + else if (unformat(line_input, \"next-ip6\")) + next_protocol = 2; + else if (unformat(line_input, \"next-ethernet\")) + next_protocol = 3; + else if (unformat(line_input, \"next-nsh\")) + next_protocol = 4; + /* + * $$$ allow the user to specify anything they want + * in the " ENCAP_STACK " header + */ + else + return clib_error_return (0, \"parse error: '%U'\", + format_unformat_error, line_input); + } + + unformat_free (line_input); + + if (src_set == 0) + return clib_error_return (0, \"tunnel src address not specified\"); + + if (dst_set == 0) + return clib_error_return (0, \"tunnel dst address not specified\"); + + memset (a, 0, sizeof (*a)); + + a->is_add = is_add; + +#define _(x) a->x = x; + foreach_copy_field; +#undef _ + + rv = vnet_" encap_stack "_add_del_tunnel (a, 0 /* hw_if_indexp */); + + switch(rv) + { + case 0: + break; + case VNET_API_ERROR_INVALID_VALUE: + return clib_error_return (0, \"tunnel already exists...\"); + + case VNET_API_ERROR_NO_SUCH_ENTRY: + return clib_error_return (0, \"tunnel does not exist...\"); + + default: + return clib_error_return + (0, \"vnet_" encap_stack "_add_del_tunnel returned %d\", rv); + } + + return 0; +} + +VLIB_CLI_COMMAND (create_" encap_stack "_tunnel_command, static) = { + .path = \"lisp gpe tunnel\", + .short_help = + \"<mumble> tunnel src <ip4-addr> dst <ip4-addr>\\n\" + \" [encap-fib-id <nn>] [decap-fib-id <nn>]\\n\" + \" [decap-next [ip4|ip6|ethernet|nsh-encap|<nn>]][del]\\n\", + .function = " encap_stack "_add_del_tunnel_command_fn, +}; + +static clib_error_t * +show_" encap_stack "_tunnel_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + " encap_stack "_main_t * ngm = &" encap_stack "_main; + " encap_stack "_tunnel_t * t; + + if (pool_elts (ngm->tunnels) == 0) + vlib_cli_output (vm, \"No lisp-gpe tunnels configured...\"); + + pool_foreach (t, ngm->tunnels, + ({ + vlib_cli_output (vm, \"%U\", format_" encap_stack "_tunnel); + })); + + return 0; +} + +VLIB_CLI_COMMAND (show_" encap_stack "_tunnel_command, static) = { + .path = \"show lisp gpe tunnel\", + .function = show_" encap_stack "_tunnel_command_fn, +}; + +clib_error_t *" encap_stack "_init (vlib_main_t *vm) +{ + " encap_stack "_main_t *ngm = &" encap_stack "_main; + + ngm->vnet_main = vnet_get_main(); + ngm->vlib_main = vm; + + ngm->" encap_stack "_tunnel_by_key + = hash_create_mem (0, sizeof(" encap_stack "_tunnel_key_t), sizeof (uword)); + + /* YMMV, register with the local netstack */ + udp_register_dst_port (vm, UDP_DST_PORT_" encap_stack ", + " encap_stack "_input_node.index, 1 /* is_ip4 */); + return 0; +} + +VLIB_INIT_FUNCTION(" encap_stack "_init); + +") + diff --git a/build-root/emacs-lisp/tunnel-decap-skel.el b/build-root/emacs-lisp/tunnel-decap-skel.el new file mode 100644 index 00000000..fc6f3a14 --- /dev/null +++ b/build-root/emacs-lisp/tunnel-decap-skel.el @@ -0,0 +1,299 @@ +;;; tunnel-decap-skel.el - tunnel decapsulation skeleton + +(require 'skeleton) + +(define-skeleton tunnel-decap-skel +"Insert a tunnel decap implementation" +nil +'(setq encap_stack (skeleton-read "encap_stack (e.g ip4_udp_lisp): ")) +'(setq ENCAP_STACK (upcase encap_stack)) +'(setq encap-stack (replace-regexp-in-string "_" "-" encap_stack)) +'(setq ENCAP-STACK (upcase encap-stack)) +" +#include <vlib/vlib.h> +#include <vnet/pg/pg.h> +#include <vnet/" encap-stack "/" encap_stack ".h> + +typedef struct { + u32 next_index; + u32 tunnel_index; + u32 error; + " encap_stack "_header_t h; +} " encap_stack "_rx_trace_t; + +static u8 * format_" encap_stack "_rx_trace (u8 * s, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + " encap_stack "_rx_trace_t * t = va_arg (*args, " encap_stack "_rx_trace_t *); + + if (t->tunnel_index != ~0) + { + s = format (s, \"" ENCAP-STACK ": tunnel %d next %d error %d\", + t->tunnel_index, t->next_index, t->error); + } + else + { + s = format (s, \"" ENCAP-STACK ": no tunnel next %d error %d\\n\", + t->next_index, t->error); + } + s = format (s, \"\\n %U\", format_" encap_stack "_header_with_length, &t->h, + (u32) sizeof (t->h) /* max size */); + return s; +} + +static uword +" encap_stack "_input (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + u32 n_left_from, next_index, * from, * to_next; + " encap_stack "_main_t * ngm = &" encap_stack "_main; + u32 last_tunnel_index = ~0; + " encap_stack "_tunnel_key_t last_key; + u32 pkts_decapsulated = 0; + + memset (&last_key, 0xff, sizeof (last_key)); + + from = vlib_frame_vector_args (from_frame); + n_left_from = from_frame->n_vectors; + + next_index = node->cached_next_index; + + while (n_left_from > 0) + { + u32 n_left_to_next; + + vlib_get_next_frame (vm, node, next_index, + to_next, n_left_to_next); + +#if 0 /* $$$ dual loop when the single loop works */ + while (n_left_from >= 4 && n_left_to_next >= 2) + { + u32 bi0, bi1; + vlib_buffer_t * b0, * b1; + nsh_unicast_header_t * h0, * h1; + u32 label0, label1; + u32 next0, next1; + uword * p0, * p1; + + /* 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); + + h0 = vlib_buffer_get_current (b0); + h1 = vlib_buffer_get_current (b1); + + next0 = next1 = " ENCAP_STACK "_INPUT_NEXT_IP4_INPUT; + + label0 = clib_net_to_host_u32 (h0->label_exp_s_ttl); + label1 = clib_net_to_host_u32 (h1->label_exp_s_ttl); + + /* + * Translate label contents into a fib index. + * This is a decent sanity check, and guarantees + * a sane FIB for the downstream lookup + */ + label0 = vnet_nsh_uc_get_label (label0); + label1 = vnet_nsh_uc_get_label (label1); + + /* If 2xlabels match, and match the 1-wide cache, use it */ + if (label0 == label1 && rt->last_label == label0) + { + vnet_buffer(b0)->sw_if_index[VLIB_TX] = rt->last_fib_index; + vnet_buffer(b1)->sw_if_index[VLIB_TX] = rt->last_fib_index; + } + else + { + p0 = hash_get (rt->mm->fib_index_by_nsh_label, label0); + if (PREDICT_FALSE (p0 == 0)) + { + next0 = " ENCAP_STACK "_INPUT_NEXT_DROP; + b0->error = node->errors[NSH_ERROR_BAD_LABEL]; + } + else + vnet_buffer(b0)->sw_if_index[VLIB_TX] = p0[0]; + + p1 = hash_get (rt->mm->fib_index_by_nsh_label, label1); + if (PREDICT_FALSE (p1 == 0)) + { + next1 = " ENCAP_STACK "_INPUT_NEXT_DROP; + b1->error = node->errors[NSH_ERROR_BAD_LABEL]; + } + else + { + vnet_buffer(b1)->sw_if_index[VLIB_TX] = p1[0]; + rt->last_fib_index = p1[0]; + rt->last_label = label1; + } + } + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + nsh_rx_trace_t *tr = vlib_add_trace (vm, node, + b0, sizeof (*tr)); + tr->label_exp_s_ttl = label0; + } + if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED)) + { + nsh_rx_trace_t *tr = vlib_add_trace (vm, node, + b1, sizeof (*tr)); + tr->label_exp_s_ttl = label1; + } + + vlib_buffer_advance (b0, sizeof (*h0)); + vlib_buffer_advance (b1, sizeof (*h1)); + + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, next1); + } +#endif + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t * b0; + u32 next0; + " encap_stack "_header_t * iuX0; + uword * p0; + u32 tunnel_index0; + " encap_stack "_tunnel_t * t0; + " encap_stack "_tunnel_key_t key0; + u32 error0; + + 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); + + /* + * udp leaves current_data pointing at the tunnel header + * $$$$ FIXME + */ + vlib_buffer_advance + (b0, -(word)(sizeof(udp_header_t)+sizeof(ip4_header_t))); + + iuX0 = vlib_buffer_get_current (b0); + + /* pop (ip, udp, lisp-gpe) */ + vlib_buffer_advance (b0, sizeof (*iuX0)); + + tunnel_index0 = ~0; + error0 = 0; + next0 = " ENCAP_STACK "_INPUT_NEXT_DROP; + + key0.src = iuX0->ip4.src_address.as_u32; + key0.iid = iuX0->lisp.iid; + + /* $$$ validate key comparison */ + if (PREDICT_FALSE ((key0.as_u64[0] != last_key.as_u64[0]))) + { + p0 = hash_get_mem (ngm->" encap_stack "_tunnel_by_key, &key0); + + if (p0 == 0) + { + error0 = " ENCAP_STACK "_ERROR_NO_SUCH_TUNNEL; + goto trace0; + } + + last_key.as_u64[0] = key0.as_u64[0]; + tunnel_index0 = last_tunnel_index = p0[0]; + } + else + tunnel_index0 = last_tunnel_index; + + t0 = pool_elt_at_index (ngm->tunnels, tunnel_index0); + + next0 = t0->decap_next_index; + + /* Required to make the l2 tag push / pop code work on l2 subifs */ + vnet_update_l2_len (b0); + + /* + * ip[46] lookup in the configured FIB + * " encap-stack ", here's the encap tunnel sw_if_index + */ + vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index; + pkts_decapsulated ++; + + trace0: + b0->error = error0 ? node->errors[error0] : 0; + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + " encap_stack "_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->h = iuX0->lisp; + } + 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); + } + vlib_node_increment_counter (vm, " encap_stack "_input_node.index, + " ENCAP_STACK "_ERROR_DECAPSULATED, + pkts_decapsulated); + return from_frame->n_vectors; +} + +static char * " encap_stack "_error_strings[] = { +#define " encap_stack "_error(n,s) s, +#include <vnet/" encap-stack "/" encap_stack "_error.def> +#undef " encap_stack "_error +#undef _ +}; + +VLIB_REGISTER_NODE (" encap_stack "_input_node) = { + .function = \"" encap_stack "_input\", + .name = \"" encap-stack "-input\", + /* Takes a vector of packets. */ + .vector_size = sizeof (u32), + + .n_errors = " ENCAP_STACK "_N_ERROR, + .error_strings = " encap_stack "_error_strings, + + .n_next_nodes = " ENCAP_STACK "_INPUT_N_NEXT, + .next_nodes = { +#define _(s,n) [" ENCAP_STACK "_INPUT_NEXT_##s] = n, + foreach_" encap_stack "_input_next +#undef _ + }, + + .format_buffer = format_" encap_stack "_header_with_length, + .format_trace = format_" encap_stack "_rx_trace, + // $$$$ .unformat_buffer = unformat_" encap_stack "_header, +}; + +") diff --git a/build-root/emacs-lisp/tunnel-encap-skel.el b/build-root/emacs-lisp/tunnel-encap-skel.el new file mode 100644 index 00000000..5933153e --- /dev/null +++ b/build-root/emacs-lisp/tunnel-encap-skel.el @@ -0,0 +1,245 @@ +;;; tunnel-encap-skel.el - tunnel interface output skeleton + +(require 'skeleton) + +(define-skeleton tunnel-encap-skel +"Insert a tunnel encap implementation" +nil +'(setq encap_stack (skeleton-read "encap_stack (e.g ip4_udp_lisp): ")) +'(setq ENCAP_STACK (upcase encap_stack)) +'(setq encap-stack (replace-regexp-in-string "_" "-" encap_stack)) +'(setq ENCAP-STACK (upcase encap-stack)) +" +#include <clib/error.h> +#include <clib/hash.h> +#include <vnet/vnet.h> +#include <vnet/ip/ip.h> +#include <vnet/ethernet/ethernet.h> +#include <vnet/" encap-stack "/" encap_stack ".h> + +/* Statistics (not really errors) */ +#define foreach_" encap_stack "_encap_error \\ +_(ENCAPSULATED, \"good packets encapsulated\") + +static char * " encap_stack "_encap_error_strings[] = { +#define _(sym,string) string, + foreach_" encap_stack "_encap_error +#undef _ +}; + +typedef enum { +#define _(sym,str) " ENCAP_STACK "_ENCAP_ERROR_##sym, + foreach_" encap_stack "_encap_error +#undef _ + " ENCAP_STACK "_ENCAP_N_ERROR, +} " encap_stack "_encap_error_t; + +typedef enum { + " ENCAP_STACK "_ENCAP_NEXT_IP4_LOOKUP, + " ENCAP_STACK "_ENCAP_NEXT_DROP, + " ENCAP_STACK "_ENCAP_N_NEXT, +} " encap_stack "_encap_next_t; + +typedef struct { + u32 tunnel_index; +} " encap_stack "_encap_trace_t; + +u8 * format_" encap_stack "_encap_trace (u8 * s, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + " encap_stack "_encap_trace_t * t + = va_arg (*args, " encap_stack "_encap_trace_t *); + + s = format (s, \"" ENCAP-STACK ": tunnel %d\", t->tunnel_index); + return s; +} + +/* $$$$ FIXME adjust to match the rewrite string */ +#define foreach_fixed_header_offset \\ +_(0) _(1) _(2) _(3) _(FIXME) + +static uword +" encap_stack "_encap (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + u32 n_left_from, next_index, * from, * to_next; + " encap_stack "_main_t * ngm = &" encap_stack "_main; + vnet_main_t * vnm = ngm->vnet_main; + u32 pkts_encapsulated = 0; + u16 old_l0 = 0, old_l1 = 0; + + from = vlib_frame_vector_args (from_frame); + n_left_from = from_frame->n_vectors; + + next_index = node->cached_next_index; + + while (n_left_from > 0) + { + u32 n_left_to_next; + + vlib_get_next_frame (vm, node, next_index, + to_next, n_left_to_next); + +#if 0 /* $$$ dual loop when the single loop works */ + while (n_left_from >= 4 && n_left_to_next >= 2) + { + u32 bi0, bi1; + vlib_buffer_t * b0, * b1; + nsh_unicast_header_t * h0, * h1; + u32 label0, label1; + u32 next0, next1; + uword * p0, * p1; + + /* 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); + + h0 = vlib_buffer_get_current (b0); + h1 = vlib_buffer_get_current (b1); + + next0 = next1 = " ENCAP_STACK "_ENCAP_NEXT_IP4_LOOKUP; + + vlib_buffer_advance (b0, sizeof (*h0)); + vlib_buffer_advance (b1, sizeof (*h1)); + + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, next1); + } +#endif + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t * b0; + u32 next0 = " ENCAP_STACK "_ENCAP_NEXT_IP4_LOOKUP; + vnet_hw_interface_t * hi0; + ip4_header_t * ip0; + udp_header_t * udp0; + u64 * copy_src0, * copy_dst0; + u32 * copy_src_last0, * copy_dst_last0; + " encap_stack "_tunnel_t * t0; + u16 new_l0; + ip_csum_t sum0; + + 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); + + /* 1-wide cache? */ + hi0 = vnet_get_sup_hw_interface + (vnm, vnet_buffer(b0)->sw_if_index[VLIB_TX]); + + t0 = pool_elt_at_index (ngm->tunnels, hi0->dev_instance); + + ASSERT(vec_len(t0->rewrite) >= 24); + + /* Apply the rewrite string. $$$$ vnet_rewrite? */ + vlib_buffer_advance (b0, -(word)_vec_len(t0->rewrite)); + + ip0 = vlib_buffer_get_current(b0); + /* Copy the fixed header */ + copy_dst0 = (u64 *) ip0; + copy_src0 = (u64 *) t0->rewrite; + + ASSERT (sizeof (ip4_udp_" encap_stack "_header_t) == FIXME); + + /* Copy first N octets 8-bytes at a time */ +#define _(offs) copy_dst0[offs] = copy_src0[offs]; + foreach_fixed_header_offset; +#undef _ +#if 0 /* needed if encap not a multiple of 8 bytes */ + /* Last 4 octets. Hopefully gcc will be our friend */ + copy_dst_last0 = (u32 *)(©_dst0[FIXME]); + copy_src_last0 = (u32 *)(©_src0[FIXME]); + copy_dst_last0[0] = copy_src_last0[0]; + +#endif + /* fix the <bleep>ing outer-IP checksum */ + sum0 = ip0->checksum; + /* old_l0 always 0, see the rewrite setup */ + new_l0 = + clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)); + + sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t, + length /* changed member */); + ip0->checksum = ip_csum_fold (sum0); + ip0->length = new_l0; + + /* Fix UDP length */ + udp0 = (udp_header_t *)(ip0+1); + new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) + - sizeof (*ip0)); + + udp0->length = new_l0; + + /* Reset to look up tunnel partner in the configured FIB */ + vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->encap_fib_index; + pkts_encapsulated ++; + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + " encap_stack "_encap_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->tunnel_index = t0 - ngm->tunnels; + } + 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); + } + vlib_node_increment_counter (vm, node->node_index, + " ENCAP_STACK "_ENCAP_ERROR_ENCAPSULATED, + pkts_encapsulated); + return from_frame->n_vectors; +} + +VLIB_REGISTER_NODE (" encap_stack "_encap_node) = { + .function = " encap_stack "_encap, + .name = \"" encap-stack "-encap\", + .vector_size = sizeof (u32), + .format_trace = format_" encap_stack "_encap_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(" encap_stack "_encap_error_strings), + .error_strings = " encap_stack "_encap_error_strings, + + .n_next_nodes = " ENCAP_STACK "_ENCAP_N_NEXT, + + .next_nodes = { + [" ENCAP_STACK "_ENCAP_NEXT_IP4_LOOKUP] = \"ip4-lookup\", + [" ENCAP_STACK "_ENCAP_NEXT_DROP] = \"error-drop\", + }, +}; +") diff --git a/build-root/emacs-lisp/tunnel-h-skel.el b/build-root/emacs-lisp/tunnel-h-skel.el new file mode 100644 index 00000000..7e33309b --- /dev/null +++ b/build-root/emacs-lisp/tunnel-h-skel.el @@ -0,0 +1,128 @@ +;;; tunnel-h-skel.el - tunnel encap header file skeleton + +(require 'skeleton) + +(define-skeleton tunnel-h-skel +"Insert a tunnel encap header file" +nil +'(setq encap_stack (skeleton-read "encap_stack (e.g ip4_udp_lisp): ")) +'(setq ENCAP_STACK (upcase encap_stack)) +'(setq encap-stack (replace-regexp-in-string "_" "-" encap_stack)) +" +#ifndef included_vnet_" encap_stack "_h +#define included_vnet_" encap_stack "_h + +#include <clib/error.h> +#include <clib/hash.h> +#include <vnet/vnet.h> +#include <vnet/ip/ip.h> +#include <vnet/l2/l2_input.h> +#include <vnet/ethernet/ethernet.h> +#include <vnet/" encap-stack "/" encap_stack "_packet.h> +#include <vnet/ip/ip4_packet.h> +#include <vnet/ip/udp.h> + +/* Encap stack built in encap.c */ +typedef CLIB_PACKED (struct { + ip4_header_t ip4; /* 20 bytes */ + udp_header_t udp; /* 8 bytes */ + " encap_stack "_header_t lisp; /* 8 bytes */ +}) " encap_stack "_header_t; + +typedef CLIB_PACKED(struct { + /* + * Key fields: + * all fields in NET byte order + */ + union { + struct { + u32 FIXME_NET_BYTE_ORDER; + }; + u64 as_u64[1]; + }; +}) " encap_stack "_tunnel_key_t; + +typedef struct { + /* Rewrite string. $$$$ maybe: embed vnet_rewrite header */ + u8 * rewrite; + + /* decap next index */ + u32 decap_next_index; + + /* tunnel src and dst addresses */ + ip4_address_t src; + ip4_address_t dst; + + /* FIB indices */ + u32 encap_fib_index; /* tunnel partner lookup here */ + u32 decap_fib_index; /* inner IP lookup here */ + + /* vnet intfc hw/sw_if_index */ + u32 hw_if_index; + + /* encap header fields in HOST byte order */ + u32 FIXME; +} " encap_stack "_tunnel_t; + +#define foreach_" encap_stack "_input_next \\ +_(DROP, \"error-drop\") \\ +_(IP4_INPUT, \"ip4-input\") \\ +_(IP6_INPUT, \"ip6-input\") \\ +_(ETHERNET_INPUT, \"ethernet-input\") \\ +_(" ENCAP_STACK "_ENCAP, \"" encap-stack "-encap\") + +typedef enum { +#define _(s,n) " ENCAP_STACK "_INPUT_NEXT_##s, + foreach_" encap_stack "_input_next +#undef _ + " ENCAP_STACK "_INPUT_N_NEXT, +} " encap_stack "_input_next_t; + +typedef enum { +#define " encap_stack "_error(n,s) " ENCAP_STACK "_ERROR_##n, +#include <vnet/" encap-stack "/" encap_stack "_error.def> +#undef " encap_stack "_error + " ENCAP_STACK "_N_ERROR, +} " encap_stack "_input_error_t; + +typedef struct { + /* vector of encap tunnel instances */ + " encap_stack "_tunnel_t *tunnels; + + /* lookup tunnel by key */ + uword * " encap_stack "_tunnel_by_key; + + /* Free vlib hw_if_indices */ + u32 * free_" encap_stack "_tunnel_hw_if_indices; + + /* convenience */ + vlib_main_t * vlib_main; + vnet_main_t * vnet_main; +} " encap_stack "_main_t; + +" encap_stack "_main_t " encap_stack "_main; + +vlib_node_registration_t " encap_stack "_input_node; +vlib_node_registration_t " encap_stack "_encap_node; + +u8 * format_" encap_stack "_encap_trace (u8 * s, va_list * args); +u8 * format_" encap_stack "_header_with_length (u8 * s, va_list * args); + +typedef struct { + u8 is_add; + ip4_address_t src, dst; + u32 encap_fib_index; + u32 decap_fib_index; + u32 decap_next_index; + /* encap fields in HOST byte order */ + u8 FIXME_HOST_BYTE_ORDER; +} vnet_" encap_stack "_add_del_tunnel_args_t; + +int vnet_" encap_stack "_add_del_tunnel +(vnet_" encap_stack "_add_del_tunnel_args_t *a, u32 * hw_if_indexp); + +u8 * format_" encap_stack "_header_with_length (u8 * s, va_list * args); + +#endif /* included_vnet_" encap_stack "_h */ + +") |