/*
* Copyright (c) 2020 Doc.ai and/or its affiliates.
+ * Copyright (c) 2020 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
#include <vlib/vlib.h>
#include <vnet/vnet.h>
-#include <vnet/pg/pg.h>
#include <vppinfra/error.h>
#include <wireguard/wireguard.h>
#include <wireguard/wireguard_send.h>
#include <wireguard/wireguard_if.h>
-#define foreach_wg_input_error \
- _(NONE, "No error") \
- _(HANDSHAKE_MAC, "Invalid MAC handshake") \
- _(PEER, "Peer error") \
- _(INTERFACE, "Interface error") \
- _(DECRYPTION, "Failed during decryption") \
- _(KEEPALIVE_SEND, "Failed while sending Keepalive") \
- _(HANDSHAKE_SEND, "Failed while sending Handshake") \
- _(UNDEFINED, "Undefined error")
+#define foreach_wg_input_error \
+ _ (NONE, "No error") \
+ _ (HANDSHAKE_MAC, "Invalid MAC handshake") \
+ _ (PEER, "Peer error") \
+ _ (INTERFACE, "Interface error") \
+ _ (DECRYPTION, "Failed during decryption") \
+ _ (KEEPALIVE_SEND, "Failed while sending Keepalive") \
+ _ (HANDSHAKE_SEND, "Failed while sending Handshake") \
+ _ (HANDSHAKE_RECEIVE, "Failed while receiving Handshake") \
+ _ (COOKIE_DECRYPTION, "Failed during Cookie decryption") \
+ _ (COOKIE_SEND, "Failed during sending Cookie") \
+ _ (TOO_BIG, "Packet too big") \
+ _ (UNDEFINED, "Undefined error") \
+ _ (CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)")
typedef enum
{
message_type_t type;
u16 current_length;
bool is_keepalive;
-
+ index_t peer;
} wg_input_trace_t;
+typedef struct
+{
+ index_t peer;
+ u16 next;
+} wg_input_post_trace_t;
+
u8 *
format_wg_message_type (u8 * s, va_list * args)
{
wg_input_trace_t *t = va_arg (*args, wg_input_trace_t *);
- s = format (s, "WG input: \n");
- s = format (s, " Type: %U\n", format_wg_message_type, t->type);
- s = format (s, " Length: %d\n", t->current_length);
- s = format (s, " Keepalive: %s", t->is_keepalive ? "true" : "false");
+ s = format (s, "Wireguard input: \n");
+ s = format (s, " Type: %U\n", format_wg_message_type, t->type);
+ s = format (s, " Peer: %d\n", t->peer);
+ s = format (s, " Length: %d\n", t->current_length);
+ s = format (s, " Keepalive: %s", t->is_keepalive ? "true" : "false");
+
+ return s;
+}
+
+/* post-node packet trace format function */
+static u8 *
+format_wg_input_post_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 *);
+
+ wg_input_post_trace_t *t = va_arg (*args, wg_input_post_trace_t *);
+
+ s = format (s, "WG input post: \n");
+ s = format (s, " peer: %u\n", t->peer);
+ s = format (s, " next: %u\n", t->next);
return s;
}
typedef enum
{
+ WG_INPUT_NEXT_HANDOFF_HANDSHAKE,
+ WG_INPUT_NEXT_HANDOFF_DATA,
WG_INPUT_NEXT_IP4_INPUT,
+ WG_INPUT_NEXT_IP6_INPUT,
WG_INPUT_NEXT_PUNT,
WG_INPUT_NEXT_ERROR,
WG_INPUT_N_NEXT,
/* } */
/* } */
+static u8
+is_ip4_header (u8 *data)
+{
+ return (data[0] >> 4) == 0x4;
+}
+
static wg_input_error_t
-wg_handshake_process (vlib_main_t * vm, wg_main_t * wmp, vlib_buffer_t * b)
+wg_handshake_process (vlib_main_t *vm, wg_main_t *wmp, vlib_buffer_t *b,
+ u32 node_idx, u8 is_ip4)
{
+ ASSERT (vm->thread_index == 0);
+
enum cookie_mac_state mac_state;
bool packet_needs_cookie;
bool under_load;
+ index_t *wg_ifs;
wg_if_t *wg_if;
wg_peer_t *peer = NULL;
void *current_b_data = vlib_buffer_get_current (b);
+ ip46_address_t src_ip;
+ if (is_ip4)
+ {
+ ip4_header_t *iph4 =
+ current_b_data - sizeof (udp_header_t) - sizeof (ip4_header_t);
+ ip46_address_set_ip4 (&src_ip, &iph4->src_address);
+ }
+ else
+ {
+ ip6_header_t *iph6 =
+ current_b_data - sizeof (udp_header_t) - sizeof (ip6_header_t);
+ ip46_address_set_ip6 (&src_ip, &iph6->src_address);
+ }
+
udp_header_t *uhd = current_b_data - sizeof (udp_header_t);
- ip4_header_t *iph =
- current_b_data - sizeof (udp_header_t) - sizeof (ip4_header_t);
- ip4_address_t ip4_src = iph->src_address;
u16 udp_src_port = clib_host_to_net_u16 (uhd->src_port);;
u16 udp_dst_port = clib_host_to_net_u16 (uhd->dst_port);;
message_header_t *header = current_b_data;
- under_load = false;
-
- wg_if = wg_if_get_by_port (udp_dst_port);
-
- if (NULL == wg_if)
- return WG_INPUT_ERROR_INTERFACE;
- if (header->type == MESSAGE_HANDSHAKE_COOKIE)
+ if (PREDICT_FALSE (header->type == MESSAGE_HANDSHAKE_COOKIE))
{
message_handshake_cookie_t *packet =
(message_handshake_cookie_t *) current_b_data;
u32 *entry =
wg_index_table_lookup (&wmp->index_table, packet->receiver_index);
if (entry)
- {
- peer = pool_elt_at_index (wmp->peers, *entry);
- }
- if (!peer)
+ peer = wg_peer_get (*entry);
+ else
return WG_INPUT_ERROR_PEER;
- // TODO: Implement cookie_maker_consume_payload
+ if (!cookie_maker_consume_payload (
+ vm, &peer->cookie_maker, packet->nonce, packet->encrypted_cookie))
+ return WG_INPUT_ERROR_COOKIE_DECRYPTION;
return WG_INPUT_ERROR_NONE;
}
message_macs_t *macs = (message_macs_t *)
((u8 *) current_b_data + len - sizeof (*macs));
- mac_state =
- cookie_checker_validate_macs (vm, &wg_if->cookie_checker, macs,
- current_b_data, len, under_load, ip4_src,
- udp_src_port);
+ index_t *ii;
+ wg_ifs = wg_if_indexes_get_by_port (udp_dst_port);
+ if (NULL == wg_ifs)
+ return WG_INPUT_ERROR_INTERFACE;
+
+ vec_foreach (ii, wg_ifs)
+ {
+ wg_if = wg_if_get (*ii);
+ if (NULL == wg_if)
+ continue;
+
+ under_load = wg_if_is_under_load (vm, wg_if);
+ mac_state = cookie_checker_validate_macs (
+ vm, &wg_if->cookie_checker, macs, current_b_data, len, under_load,
+ &src_ip, udp_src_port);
+ if (mac_state == INVALID_MAC)
+ {
+ wg_if_dec_handshake_num (wg_if);
+ wg_if = NULL;
+ continue;
+ }
+ break;
+ }
+
+ if (NULL == wg_if)
+ return WG_INPUT_ERROR_HANDSHAKE_MAC;
if ((under_load && mac_state == VALID_MAC_WITH_COOKIE)
|| (!under_load && mac_state == VALID_MAC_BUT_NO_COOKIE))
if (packet_needs_cookie)
{
- // TODO: Add processing
+
+ if (!wg_send_handshake_cookie (vm, message->sender_index,
+ &wg_if->cookie_checker, macs,
+ &ip_addr_46 (&wg_if->src_ip),
+ wg_if->port, &src_ip, udp_src_port))
+ return WG_INPUT_ERROR_COOKIE_SEND;
+
+ return WG_INPUT_ERROR_NONE;
}
- noise_remote_t *rp;
+ noise_remote_t *rp;
if (noise_consume_initiation
- (wmp->vlib_main, &wg_if->local, &rp, message->sender_index,
- message->unencrypted_ephemeral, message->encrypted_static,
- message->encrypted_timestamp))
+ (vm, noise_local_get (wg_if->local_idx), &rp,
+ message->sender_index, message->unencrypted_ephemeral,
+ message->encrypted_static, message->encrypted_timestamp))
{
- peer = pool_elt_at_index (wmp->peers, rp->r_peer_idx);
+ peer = wg_peer_get (rp->r_peer_idx);
+ }
+ else
+ {
+ return WG_INPUT_ERROR_PEER;
}
-
- if (!peer)
- return WG_INPUT_ERROR_PEER;
// set_peer_address (peer, ip4_src, udp_src_port);
if (PREDICT_FALSE (!wg_send_handshake_response (vm, peer)))
{
- vlib_node_increment_counter (vm, wg_input_node.index,
+ vlib_node_increment_counter (vm, node_idx,
WG_INPUT_ERROR_HANDSHAKE_SEND, 1);
}
+ else
+ {
+ wg_peer_update_flags (rp->r_peer_idx, WG_PEER_ESTABLISHED, true);
+ }
break;
}
case MESSAGE_HANDSHAKE_RESPONSE:
{
message_handshake_response_t *resp = current_b_data;
+
+ if (packet_needs_cookie)
+ {
+ if (!wg_send_handshake_cookie (vm, resp->sender_index,
+ &wg_if->cookie_checker, macs,
+ &ip_addr_46 (&wg_if->src_ip),
+ wg_if->port, &src_ip, udp_src_port))
+ return WG_INPUT_ERROR_COOKIE_SEND;
+
+ return WG_INPUT_ERROR_NONE;
+ }
+
+ index_t peeri = INDEX_INVALID;
u32 *entry =
wg_index_table_lookup (&wmp->index_table, resp->receiver_index);
- if (entry)
+
+ if (PREDICT_TRUE (entry != NULL))
{
- peer = pool_elt_at_index (wmp->peers, *entry);
- if (!peer || peer->is_dead)
+ peeri = *entry;
+ peer = wg_peer_get (peeri);
+ if (wg_peer_is_dead (peer))
return WG_INPUT_ERROR_PEER;
}
+ else
+ return WG_INPUT_ERROR_PEER;
if (!noise_consume_response
- (wmp->vlib_main, &peer->remote, resp->sender_index,
+ (vm, &peer->remote, resp->sender_index,
resp->receiver_index, resp->unencrypted_ephemeral,
resp->encrypted_nothing))
{
return WG_INPUT_ERROR_PEER;
}
- if (packet_needs_cookie)
- {
- // TODO: Add processing
- }
// set_peer_address (peer, ip4_src, udp_src_port);
- if (noise_remote_begin_session (wmp->vlib_main, &peer->remote))
+ if (noise_remote_begin_session (vm, &peer->remote))
{
+
wg_timers_session_derived (peer);
wg_timers_handshake_complete (peer);
if (PREDICT_FALSE (!wg_send_keepalive (vm, peer)))
{
- vlib_node_increment_counter (vm, wg_input_node.index,
- WG_INPUT_ERROR_KEEPALIVE_SEND,
- 1);
+ vlib_node_increment_counter (vm, node_idx,
+ WG_INPUT_ERROR_KEEPALIVE_SEND, 1);
+ }
+ else
+ {
+ wg_peer_update_flags (peeri, WG_PEER_ESTABLISHED, true);
}
}
break;
}
default:
- break;
+ return WG_INPUT_ERROR_HANDSHAKE_RECEIVE;
}
wg_timers_any_authenticated_packet_received (peer);
return WG_INPUT_ERROR_NONE;
}
-static_always_inline bool
-fib_prefix_is_cover_addr_4 (const fib_prefix_t * p1,
- const ip4_address_t * ip4)
+static_always_inline int
+wg_input_post_process (vlib_main_t *vm, vlib_buffer_t *b, u16 *next,
+ wg_peer_t *peer, message_data_t *data,
+ bool *is_keepalive)
{
- switch (p1->fp_proto)
+ next[0] = WG_INPUT_NEXT_PUNT;
+
+ noise_keypair_t *kp =
+ wg_get_active_keypair (&peer->remote, data->receiver_index);
+
+ if (!noise_counter_recv (&kp->kp_ctr, data->counter))
{
- case FIB_PROTOCOL_IP4:
- return (ip4_destination_matches_route (&ip4_main,
- &p1->fp_addr.ip4,
- ip4, p1->fp_len) != 0);
- case FIB_PROTOCOL_IP6:
- return (false);
- case FIB_PROTOCOL_MPLS:
- break;
+ return -1;
+ }
+
+ u16 encr_len = b->current_length - sizeof (message_data_t);
+ u16 decr_len = encr_len - NOISE_AUTHTAG_LEN;
+
+ vlib_buffer_advance (b, sizeof (message_data_t));
+ b->current_length = decr_len;
+ vnet_buffer_offload_flags_clear (b, VNET_BUFFER_OFFLOAD_F_UDP_CKSUM);
+
+ /* Keepalive packet has zero length */
+ if (decr_len == 0)
+ {
+ *is_keepalive = true;
+ return -1;
+ }
+
+ wg_timers_data_received (peer);
+
+ ip46_address_t src_ip;
+ u8 is_ip4_inner = is_ip4_header (vlib_buffer_get_current (b));
+ if (is_ip4_inner)
+ {
+ ip46_address_set_ip4 (
+ &src_ip, &((ip4_header_t *) vlib_buffer_get_current (b))->src_address);
+ }
+ else
+ {
+ ip46_address_set_ip6 (
+ &src_ip, &((ip6_header_t *) vlib_buffer_get_current (b))->src_address);
}
- return (false);
+
+ const fib_prefix_t *allowed_ip;
+ bool allowed = false;
+
+ /*
+ * we could make this into an ACL, but the expectation
+ * is that there aren't many allowed IPs and thus a linear
+ * walk is faster than an ACL
+ */
+ vec_foreach (allowed_ip, peer->allowed_ips)
+ {
+ if (fib_prefix_is_cover_addr_46 (allowed_ip, &src_ip))
+ {
+ allowed = true;
+ break;
+ }
+ }
+ if (allowed)
+ {
+ vnet_buffer (b)->sw_if_index[VLIB_RX] = peer->wg_sw_if_index;
+ next[0] =
+ is_ip4_inner ? WG_INPUT_NEXT_IP4_INPUT : WG_INPUT_NEXT_IP6_INPUT;
+ }
+
+ return 0;
}
-VLIB_NODE_FN (wg_input_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+static_always_inline void
+wg_input_process_ops (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vnet_crypto_op_t *ops, vlib_buffer_t *b[], u16 *nexts,
+ u16 drop_next)
{
- message_type_t header_type;
- u32 n_left_from;
- u32 *from;
- vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
- u16 nexts[VLIB_FRAME_SIZE], *next;
+ u32 n_fail, n_ops = vec_len (ops);
+ vnet_crypto_op_t *op = ops;
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- b = bufs;
- next = nexts;
+ if (n_ops == 0)
+ return;
- vlib_get_buffers (vm, from, bufs, n_left_from);
+ n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops);
+
+ while (n_fail)
+ {
+ ASSERT (op - ops < n_ops);
+
+ if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
+ {
+ u32 bi = op->user_data;
+ b[bi]->error = node->errors[WG_INPUT_ERROR_DECRYPTION];
+ nexts[bi] = drop_next;
+ n_fail--;
+ }
+ op++;
+ }
+}
+always_inline void
+wg_prepare_sync_dec_op (vlib_main_t *vm, vnet_crypto_op_t **crypto_ops,
+ u8 *src, u32 src_len, u8 *dst, u8 *aad, u32 aad_len,
+ vnet_crypto_key_index_t key_index, u32 bi, u8 *iv)
+{
+ vnet_crypto_op_t _op, *op = &_op;
+ u8 src_[] = {};
+
+ vec_add2_aligned (crypto_ops[0], op, 1, CLIB_CACHE_LINE_BYTES);
+ vnet_crypto_op_init (op, VNET_CRYPTO_OP_CHACHA20_POLY1305_DEC);
+
+ op->tag_len = NOISE_AUTHTAG_LEN;
+ op->tag = src + src_len;
+ op->src = !src ? src_ : src;
+ op->len = src_len;
+ op->dst = dst;
+ op->key_index = key_index;
+ op->aad = aad;
+ op->aad_len = aad_len;
+ op->iv = iv;
+ op->user_data = bi;
+ op->flags |= VNET_CRYPTO_OP_FLAG_HMAC_CHECK;
+}
+
+static_always_inline void
+wg_input_add_to_frame (vlib_main_t *vm, vnet_crypto_async_frame_t *f,
+ u32 key_index, u32 crypto_len, i16 crypto_start_offset,
+ u32 buffer_index, u16 next_node, u8 *iv, u8 *tag,
+ u8 flags)
+{
+ vnet_crypto_async_frame_elt_t *fe;
+ u16 index;
+
+ ASSERT (f->n_elts < VNET_CRYPTO_FRAME_SIZE);
+
+ index = f->n_elts;
+ fe = &f->elts[index];
+ f->n_elts++;
+ fe->key_index = key_index;
+ fe->crypto_total_length = crypto_len;
+ fe->crypto_start_offset = crypto_start_offset;
+ fe->iv = iv;
+ fe->tag = tag;
+ fe->flags = flags;
+ f->buffer_indices[index] = buffer_index;
+ f->next_node_index[index] = next_node;
+}
+
+static_always_inline enum noise_state_crypt
+wg_input_process (vlib_main_t *vm, wg_per_thread_data_t *ptd,
+ vnet_crypto_op_t **crypto_ops,
+ vnet_crypto_async_frame_t **async_frame, vlib_buffer_t *b,
+ u32 buf_idx, noise_remote_t *r, uint32_t r_idx,
+ uint64_t nonce, uint8_t *src, size_t srclen, uint8_t *dst,
+ u32 from_idx, u8 *iv, f64 time, u8 is_async,
+ u16 async_next_node)
+{
+ noise_keypair_t *kp;
+ enum noise_state_crypt ret = SC_FAILED;
+
+ if ((kp = wg_get_active_keypair (r, r_idx)) == NULL)
+ {
+ goto error;
+ }
+
+ /* We confirm that our values are within our tolerances. These values
+ * are the same as the encrypt routine.
+ *
+ * kp_ctr isn't locked here, we're happy to accept a racy read. */
+ if (wg_birthdate_has_expired_opt (kp->kp_birthdate, REJECT_AFTER_TIME,
+ time) ||
+ kp->kp_ctr.c_recv >= REJECT_AFTER_MESSAGES)
+ goto error;
+
+ /* Decrypt, then validate the counter. We don't want to validate the
+ * counter before decrypting as we do not know the message is authentic
+ * prior to decryption. */
+
+ clib_memset (iv, 0, 4);
+ clib_memcpy (iv + 4, &nonce, sizeof (nonce));
+
+ if (is_async)
+ {
+ if (NULL == *async_frame ||
+ vnet_crypto_async_frame_is_full (*async_frame))
+ {
+ *async_frame = vnet_crypto_async_get_frame (
+ vm, VNET_CRYPTO_OP_CHACHA20_POLY1305_TAG16_AAD0_DEC);
+ /* Save the frame to the list we'll submit at the end */
+ vec_add1 (ptd->async_frames, *async_frame);
+ }
+
+ wg_input_add_to_frame (vm, *async_frame, kp->kp_recv_index, srclen,
+ src - b->data, buf_idx, async_next_node, iv,
+ src + srclen, VNET_CRYPTO_OP_FLAG_HMAC_CHECK);
+ }
+ else
+ {
+ wg_prepare_sync_dec_op (vm, crypto_ops, src, srclen, dst, NULL, 0,
+ kp->kp_recv_index, from_idx, iv);
+ }
+
+ /* If we've received the handshake confirming data packet then move the
+ * next keypair into current. If we do slide the next keypair in, then
+ * we skip the REKEY_AFTER_TIME_RECV check. This is safe to do as a
+ * data packet can't confirm a session that we are an INITIATOR of. */
+ if (kp == r->r_next)
+ {
+ clib_rwlock_writer_lock (&r->r_keypair_lock);
+ if (kp == r->r_next && kp->kp_local_index == r_idx)
+ {
+ noise_remote_keypair_free (vm, r, &r->r_previous);
+ r->r_previous = r->r_current;
+ r->r_current = r->r_next;
+ r->r_next = NULL;
+
+ ret = SC_CONN_RESET;
+ clib_rwlock_writer_unlock (&r->r_keypair_lock);
+ goto error;
+ }
+ clib_rwlock_writer_unlock (&r->r_keypair_lock);
+ }
+
+ /* Similar to when we encrypt, we want to notify the caller when we
+ * are approaching our tolerances. We notify if:
+ * - we're the initiator and the current keypair is older than
+ * REKEY_AFTER_TIME_RECV seconds. */
+ ret = SC_KEEP_KEY_FRESH;
+ kp = r->r_current;
+ if (kp != NULL && kp->kp_valid && kp->kp_is_initiator &&
+ wg_birthdate_has_expired_opt (kp->kp_birthdate, REKEY_AFTER_TIME_RECV,
+ time))
+ goto error;
+
+ ret = SC_OK;
+error:
+ return ret;
+}
+
+always_inline uword
+wg_input_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame, u8 is_ip4, u16 async_next_node)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_interface_main_t *im = &vnm->interface_main;
wg_main_t *wmp = &wg_main;
+ wg_per_thread_data_t *ptd =
+ vec_elt_at_index (wmp->per_thread_data, vm->thread_index);
+ u32 *from = vlib_frame_vector_args (frame);
+ u32 n_left_from = frame->n_vectors;
+
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u32 thread_index = vm->thread_index;
+ vnet_crypto_op_t **crypto_ops = &ptd->crypto_ops;
+ const u16 drop_next = WG_INPUT_NEXT_PUNT;
+ message_type_t header_type;
+ vlib_buffer_t *data_bufs[VLIB_FRAME_SIZE];
+ u32 data_bi[VLIB_FRAME_SIZE]; /* buffer index for data */
+ u32 other_bi[VLIB_FRAME_SIZE]; /* buffer index for drop or handoff */
+ u16 other_nexts[VLIB_FRAME_SIZE], *other_next = other_nexts, n_other = 0;
+ u16 data_nexts[VLIB_FRAME_SIZE], *data_next = data_nexts, n_data = 0;
+ u16 n_async = 0;
+ const u8 is_async = wg_op_mode_is_set_ASYNC ();
+ vnet_crypto_async_frame_t *async_frame = NULL;
+
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+ vec_reset_length (ptd->crypto_ops);
+ vec_reset_length (ptd->async_frames);
+
+ f64 time = clib_time_now (&vm->clib_time) + vm->time_offset;
+
wg_peer_t *peer = NULL;
+ u32 *last_peer_time_idx = NULL;
+ u32 last_rec_idx = ~0;
+
+ bool is_keepalive = false;
+ u32 *peer_idx = NULL;
while (n_left_from > 0)
{
- bool is_keepalive = false;
- next[0] = WG_INPUT_NEXT_PUNT;
+ if (n_left_from > 2)
+ {
+ u8 *p;
+ vlib_prefetch_buffer_header (b[2], LOAD);
+ p = vlib_buffer_get_current (b[1]);
+ CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (vlib_buffer_get_tail (b[1]), CLIB_CACHE_LINE_BYTES,
+ LOAD);
+ }
+
+ other_next[n_other] = WG_INPUT_NEXT_PUNT;
+ data_nexts[n_data] = WG_INPUT_N_NEXT;
+
header_type =
((message_header_t *) vlib_buffer_get_current (b[0]))->type;
- switch (header_type)
+ if (PREDICT_TRUE (header_type == MESSAGE_DATA))
{
- case MESSAGE_HANDSHAKE_INITIATION:
- case MESSAGE_HANDSHAKE_RESPONSE:
- case MESSAGE_HANDSHAKE_COOKIE:
- {
- wg_input_error_t ret = wg_handshake_process (vm, wmp, b[0]);
- if (ret != WG_INPUT_ERROR_NONE)
- {
- next[0] = WG_INPUT_NEXT_ERROR;
- b[0]->error = node->errors[ret];
- }
- break;
- }
- case MESSAGE_DATA:
- {
- message_data_t *data = vlib_buffer_get_current (b[0]);
- u32 *entry =
- wg_index_table_lookup (&wmp->index_table, data->receiver_index);
-
- if (entry)
- {
- peer = pool_elt_at_index (wmp->peers, *entry);
- if (!peer)
- {
- next[0] = WG_INPUT_NEXT_ERROR;
- b[0]->error = node->errors[WG_INPUT_ERROR_PEER];
- goto out;
- }
- }
-
- u16 encr_len = b[0]->current_length - sizeof (message_data_t);
- u16 decr_len = encr_len - NOISE_AUTHTAG_LEN;
- u8 *decr_data = clib_mem_alloc (decr_len);
+ message_data_t *data = vlib_buffer_get_current (b[0]);
+ u8 *iv_data = b[0]->pre_data;
+ u32 buf_idx = from[b - bufs];
+ peer_idx = wg_index_table_lookup (&wmp->index_table,
+ data->receiver_index);
- enum noise_state_crypt state_cr =
- noise_remote_decrypt (wmp->vlib_main,
- &peer->remote,
- data->receiver_index,
- data->counter,
- data->encrypted_data,
- encr_len,
- decr_data);
+ if (data->receiver_index != last_rec_idx)
+ {
+ peer_idx = wg_index_table_lookup (&wmp->index_table,
+ data->receiver_index);
+ if (PREDICT_TRUE (peer_idx != NULL))
+ {
+ peer = wg_peer_get (*peer_idx);
+ }
+ last_rec_idx = data->receiver_index;
+ }
- switch (state_cr)
- {
- case SC_OK:
- break;
- case SC_CONN_RESET:
- wg_timers_handshake_complete (peer);
- break;
- case SC_KEEP_KEY_FRESH:
- if (PREDICT_FALSE (!wg_send_handshake (vm, peer, false)))
- {
- vlib_node_increment_counter (vm, wg_input_node.index,
- WG_INPUT_ERROR_HANDSHAKE_SEND,
- 1);
- }
- break;
- case SC_FAILED:
- next[0] = WG_INPUT_NEXT_ERROR;
- b[0]->error = node->errors[WG_INPUT_ERROR_DECRYPTION];
- goto out;
- default:
- break;
- }
+ if (PREDICT_FALSE (!peer_idx))
+ {
+ other_next[n_other] = WG_INPUT_NEXT_ERROR;
+ b[0]->error = node->errors[WG_INPUT_ERROR_PEER];
+ other_bi[n_other] = buf_idx;
+ n_other += 1;
+ goto out;
+ }
- clib_memcpy (vlib_buffer_get_current (b[0]), decr_data, decr_len);
- b[0]->current_length = decr_len;
- b[0]->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
+ if (PREDICT_FALSE (~0 == peer->input_thread_index))
+ {
+ /* this is the first packet to use this peer, claim the peer
+ * for this thread.
+ */
+ clib_atomic_cmp_and_swap (&peer->input_thread_index, ~0,
+ wg_peer_assign_thread (thread_index));
+ }
- clib_mem_free (decr_data);
+ if (PREDICT_TRUE (thread_index != peer->input_thread_index))
+ {
+ other_next[n_other] = WG_INPUT_NEXT_HANDOFF_DATA;
+ other_bi[n_other] = buf_idx;
+ n_other += 1;
+ goto next;
+ }
- wg_timers_any_authenticated_packet_received (peer);
- wg_timers_any_authenticated_packet_traversal (peer);
+ u16 encr_len = b[0]->current_length - sizeof (message_data_t);
+ u16 decr_len = encr_len - NOISE_AUTHTAG_LEN;
+ if (PREDICT_FALSE (decr_len >= WG_DEFAULT_DATA_SIZE))
+ {
+ b[0]->error = node->errors[WG_INPUT_ERROR_TOO_BIG];
+ other_bi[n_other] = buf_idx;
+ n_other += 1;
+ goto out;
+ }
- if (decr_len == 0)
- {
- is_keepalive = true;
- goto out;
- }
+ enum noise_state_crypt state_cr = wg_input_process (
+ vm, ptd, crypto_ops, &async_frame, b[0], buf_idx, &peer->remote,
+ data->receiver_index, data->counter, data->encrypted_data,
+ decr_len, data->encrypted_data, n_data, iv_data, time, is_async,
+ async_next_node);
- wg_timers_data_received (peer);
+ if (PREDICT_FALSE (state_cr == SC_FAILED))
+ {
+ wg_peer_update_flags (*peer_idx, WG_PEER_ESTABLISHED, false);
+ other_next[n_other] = WG_INPUT_NEXT_ERROR;
+ b[0]->error = node->errors[WG_INPUT_ERROR_DECRYPTION];
+ other_bi[n_other] = buf_idx;
+ n_other += 1;
+ goto out;
+ }
+ if (!is_async)
+ {
+ data_bufs[n_data] = b[0];
+ data_bi[n_data] = buf_idx;
+ n_data += 1;
+ }
+ else
+ {
+ n_async += 1;
+ }
- ip4_header_t *iph = vlib_buffer_get_current (b[0]);
+ if (PREDICT_FALSE (state_cr == SC_CONN_RESET))
+ {
+ wg_timers_handshake_complete (peer);
+ goto next;
+ }
+ else if (PREDICT_FALSE (state_cr == SC_KEEP_KEY_FRESH))
+ {
+ wg_send_handshake_from_mt (*peer_idx, false);
+ goto next;
+ }
+ else if (PREDICT_TRUE (state_cr == SC_OK))
+ goto next;
+ }
+ else
+ {
+ peer_idx = NULL;
- const wg_peer_allowed_ip_t *allowed_ip;
- bool allowed = false;
+ /* Handshake packets should be processed in main thread */
+ if (thread_index != 0)
+ {
+ other_next[n_other] = WG_INPUT_NEXT_HANDOFF_HANDSHAKE;
+ other_bi[n_other] = from[b - bufs];
+ n_other += 1;
+ goto next;
+ }
- /*
- * we could make this into an ACL, but the expectation
- * is that there aren't many allowed IPs and thus a linear
- * walk is fater than an ACL
- */
- vec_foreach (allowed_ip, peer->allowed_ips)
+ wg_input_error_t ret =
+ wg_handshake_process (vm, wmp, b[0], node->node_index, is_ip4);
+ if (ret != WG_INPUT_ERROR_NONE)
{
- if (fib_prefix_is_cover_addr_4 (&allowed_ip->prefix,
- &iph->src_address))
- {
- allowed = true;
- break;
- }
+ other_next[n_other] = WG_INPUT_NEXT_ERROR;
+ b[0]->error = node->errors[ret];
+ other_bi[n_other] = from[b - bufs];
+ n_other += 1;
+ }
+ else
+ {
+ other_bi[n_other] = from[b - bufs];
+ n_other += 1;
}
- if (allowed)
- {
- vnet_buffer (b[0])->sw_if_index[VLIB_RX] =
- peer->wg_sw_if_index;
- next[0] = WG_INPUT_NEXT_IP4_INPUT;
- }
- break;
- }
- default:
- break;
}
out:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+ (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
{
wg_input_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
t->type = header_type;
t->current_length = b[0]->current_length;
t->is_keepalive = is_keepalive;
+ t->peer = peer_idx ? *peer_idx : INDEX_INVALID;
}
+
+ next:
n_left_from -= 1;
- next += 1;
b += 1;
}
- vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
+
+ /* decrypt packets */
+ wg_input_process_ops (vm, node, ptd->crypto_ops, data_bufs, data_nexts,
+ drop_next);
+
+ /* process after decryption */
+ b = data_bufs;
+ n_left_from = n_data;
+ last_rec_idx = ~0;
+ last_peer_time_idx = NULL;
+
+ while (n_left_from > 0)
+ {
+ bool is_keepalive = false;
+ u32 *peer_idx = NULL;
+
+ if (PREDICT_FALSE (data_next[0] == WG_INPUT_NEXT_PUNT))
+ {
+ goto trace;
+ }
+ if (n_left_from > 2)
+ {
+ u8 *p;
+ vlib_prefetch_buffer_header (b[2], LOAD);
+ p = vlib_buffer_get_current (b[1]);
+ CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (vlib_buffer_get_tail (b[1]), CLIB_CACHE_LINE_BYTES,
+ LOAD);
+ }
+
+ message_data_t *data = vlib_buffer_get_current (b[0]);
+
+ if (data->receiver_index != last_rec_idx)
+ {
+ peer_idx =
+ wg_index_table_lookup (&wmp->index_table, data->receiver_index);
+ peer = wg_peer_get (*peer_idx);
+ last_rec_idx = data->receiver_index;
+ }
+
+ if (PREDICT_FALSE (wg_input_post_process (vm, b[0], data_next, peer,
+ data, &is_keepalive) < 0))
+ goto trace;
+
+ if (PREDICT_FALSE (peer_idx && (last_peer_time_idx != peer_idx)))
+ {
+ wg_timers_any_authenticated_packet_received_opt (peer, time);
+ wg_timers_any_authenticated_packet_traversal (peer);
+ last_peer_time_idx = peer_idx;
+ }
+
+ vlib_increment_combined_counter (im->combined_sw_if_counters +
+ VNET_INTERFACE_COUNTER_RX,
+ vm->thread_index, peer->wg_sw_if_index,
+ 1 /* packets */, b[0]->current_length);
+
+ trace:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+ (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ wg_input_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
+ t->type = header_type;
+ t->current_length = b[0]->current_length;
+ t->is_keepalive = is_keepalive;
+ t->peer = peer_idx ? *peer_idx : INDEX_INVALID;
+ }
+
+ b += 1;
+ n_left_from -= 1;
+ data_next += 1;
+ }
+
+ if (n_async)
+ {
+ /* submit all of the open frames */
+ vnet_crypto_async_frame_t **async_frame;
+ vec_foreach (async_frame, ptd->async_frames)
+ {
+ if (PREDICT_FALSE (
+ vnet_crypto_async_submit_open_frame (vm, *async_frame) < 0))
+ {
+ u32 n_drop = (*async_frame)->n_elts;
+ u32 *bi = (*async_frame)->buffer_indices;
+ u16 index = n_other;
+ while (n_drop--)
+ {
+ other_bi[index] = bi[0];
+ vlib_buffer_t *b = vlib_get_buffer (vm, bi[0]);
+ other_nexts[index] = drop_next;
+ b->error = node->errors[WG_INPUT_ERROR_CRYPTO_ENGINE_ERROR];
+ bi++;
+ index++;
+ }
+ n_other += (*async_frame)->n_elts;
+
+ vnet_crypto_async_reset_frame (*async_frame);
+ vnet_crypto_async_free_frame (vm, *async_frame);
+ }
+ }
+ }
+
+ /* enqueue other bufs */
+ if (n_other)
+ vlib_buffer_enqueue_to_next (vm, node, other_bi, other_next, n_other);
+
+ /* enqueue data bufs */
+ if (n_data)
+ vlib_buffer_enqueue_to_next (vm, node, data_bi, data_nexts, n_data);
return frame->n_vectors;
}
+always_inline uword
+wg_input_post (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_interface_main_t *im = &vnm->interface_main;
+ wg_main_t *wmp = &wg_main;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ u32 *from = vlib_frame_vector_args (frame);
+ u32 n_left = frame->n_vectors;
+ wg_peer_t *peer = NULL;
+ u32 *peer_idx = NULL;
+ u32 *last_peer_time_idx = NULL;
+ u32 last_rec_idx = ~0;
+ f64 time = clib_time_now (&vm->clib_time) + vm->time_offset;
+
+ vlib_get_buffers (vm, from, b, n_left);
+
+ if (n_left >= 2)
+ {
+ vlib_prefetch_buffer_header (b[0], LOAD);
+ vlib_prefetch_buffer_header (b[1], LOAD);
+ }
+
+ while (n_left > 0)
+ {
+ if (n_left > 2)
+ {
+ u8 *p;
+ vlib_prefetch_buffer_header (b[2], LOAD);
+ p = vlib_buffer_get_current (b[1]);
+ CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
+ }
+
+ bool is_keepalive = false;
+ message_data_t *data = vlib_buffer_get_current (b[0]);
+
+ if (data->receiver_index != last_rec_idx)
+ {
+ peer_idx =
+ wg_index_table_lookup (&wmp->index_table, data->receiver_index);
+
+ peer = wg_peer_get (*peer_idx);
+ last_rec_idx = data->receiver_index;
+ }
+
+ if (PREDICT_TRUE (peer != NULL))
+ {
+ if (PREDICT_FALSE (wg_input_post_process (vm, b[0], next, peer, data,
+ &is_keepalive) < 0))
+ goto trace;
+ }
+ else
+ {
+ next[0] = WG_INPUT_NEXT_PUNT;
+ goto trace;
+ }
+
+ if (PREDICT_FALSE (peer_idx && (last_peer_time_idx != peer_idx)))
+ {
+ wg_timers_any_authenticated_packet_received_opt (peer, time);
+ wg_timers_any_authenticated_packet_traversal (peer);
+ last_peer_time_idx = peer_idx;
+ }
+
+ vlib_increment_combined_counter (im->combined_sw_if_counters +
+ VNET_INTERFACE_COUNTER_RX,
+ vm->thread_index, peer->wg_sw_if_index,
+ 1 /* packets */, b[0]->current_length);
+
+ trace:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+ (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ wg_input_post_trace_t *t =
+ vlib_add_trace (vm, node, b[0], sizeof (*t));
+ t->next = next[0];
+ t->peer = peer_idx ? *peer_idx : INDEX_INVALID;
+ }
+
+ b += 1;
+ next += 1;
+ n_left -= 1;
+ }
+
+ vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
+ return frame->n_vectors;
+}
+
+VLIB_NODE_FN (wg4_input_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return wg_input_inline (vm, node, frame, /* is_ip4 */ 1,
+ wg_decrypt_async_next.wg4_post_next);
+}
+
+VLIB_NODE_FN (wg6_input_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return wg_input_inline (vm, node, frame, /* is_ip4 */ 0,
+ wg_decrypt_async_next.wg6_post_next);
+}
+
+VLIB_NODE_FN (wg4_input_post_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
+{
+ return wg_input_post (vm, node, from_frame);
+}
+
+VLIB_NODE_FN (wg6_input_post_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
+{
+ return wg_input_post (vm, node, from_frame);
+}
+
/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (wg_input_node) =
+VLIB_REGISTER_NODE (wg4_input_node) =
+{
+ .name = "wg4-input",
+ .vector_size = sizeof (u32),
+ .format_trace = format_wg_input_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN (wg_input_error_strings),
+ .error_strings = wg_input_error_strings,
+ .n_next_nodes = WG_INPUT_N_NEXT,
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [WG_INPUT_NEXT_HANDOFF_HANDSHAKE] = "wg4-handshake-handoff",
+ [WG_INPUT_NEXT_HANDOFF_DATA] = "wg4-input-data-handoff",
+ [WG_INPUT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
+ [WG_INPUT_NEXT_IP6_INPUT] = "ip6-input",
+ [WG_INPUT_NEXT_PUNT] = "error-punt",
+ [WG_INPUT_NEXT_ERROR] = "error-drop",
+ },
+};
+
+VLIB_REGISTER_NODE (wg6_input_node) =
{
- .name = "wg-input",
+ .name = "wg6-input",
.vector_size = sizeof (u32),
.format_trace = format_wg_input_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_next_nodes = WG_INPUT_N_NEXT,
/* edit / add dispositions here */
.next_nodes = {
+ [WG_INPUT_NEXT_HANDOFF_HANDSHAKE] = "wg6-handshake-handoff",
+ [WG_INPUT_NEXT_HANDOFF_DATA] = "wg6-input-data-handoff",
[WG_INPUT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
+ [WG_INPUT_NEXT_IP6_INPUT] = "ip6-input",
[WG_INPUT_NEXT_PUNT] = "error-punt",
[WG_INPUT_NEXT_ERROR] = "error-drop",
},
};
+
+VLIB_REGISTER_NODE (wg4_input_post_node) = {
+ .name = "wg4-input-post-node",
+ .vector_size = sizeof (u32),
+ .format_trace = format_wg_input_post_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .sibling_of = "wg4-input",
+
+ .n_errors = ARRAY_LEN (wg_input_error_strings),
+ .error_strings = wg_input_error_strings,
+};
+
+VLIB_REGISTER_NODE (wg6_input_post_node) = {
+ .name = "wg6-input-post-node",
+ .vector_size = sizeof (u32),
+ .format_trace = format_wg_input_post_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .sibling_of = "wg6-input",
+
+ .n_errors = ARRAY_LEN (wg_input_error_strings),
+ .error_strings = wg_input_error_strings,
+};
+
/* *INDENT-ON* */
/*
Code Review / vpp.git / blobdiff