n_left_from = frame->n_vectors;
next = node->cached_next_index;
- if (node->flags & VLIB_NODE_FLAG_TRACE)
- ip4_forward_next_trace (vm, node, frame, VLIB_TX);
-
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
vlib_put_next_frame (vm, node, next, n_left_to_next);
}
+ if (node->flags & VLIB_NODE_FLAG_TRACE)
+ ip4_forward_next_trace (vm, node, frame, VLIB_TX);
+
return frame->n_vectors;
}
{
.arc_name = "ip4-unicast",
.start_nodes = VNET_FEATURES ("ip4-input", "ip4-input-no-checksum"),
+ .last_in_arc = "ip4-lookup",
.arc_index_ptr = &ip4_main.lookup_main.ucast_feature_arc_index,
};
{
.arc_name = "ip4-unicast",
.node_name = "ip4-policer-classify",
- .runs_before = VNET_FEATURES ("ipsec-input-ip4"),
+ .runs_before = VNET_FEATURES ("ipsec4-input-feature"),
};
VNET_FEATURE_INIT (ip4_ipsec, static) =
{
.arc_name = "ip4-unicast",
- .node_name = "ipsec-input-ip4",
+ .node_name = "ipsec4-input-feature",
.runs_before = VNET_FEATURES ("vpath-input-ip4"),
};
{
.arc_name = "ip4-multicast",
.start_nodes = VNET_FEATURES ("ip4-input", "ip4-input-no-checksum"),
+ .last_in_arc = "ip4-mfib-forward-lookup",
.arc_index_ptr = &ip4_main.lookup_main.mcast_feature_arc_index,
};
{
.arc_name = "ip4-output",
.start_nodes = VNET_FEATURES ("ip4-rewrite", "ip4-midchain", "ip4-dvr-dpo"),
+ .last_in_arc = "interface-output",
.arc_index_ptr = &ip4_main.lookup_main.output_feature_arc_index,
};
{
.arc_name = "ip4-output",
.node_name = "ip4-outacl",
- .runs_before = VNET_FEATURES ("ipsec-output-ip4"),
+ .runs_before = VNET_FEATURES ("ipsec4-output-feature"),
};
VNET_FEATURE_INIT (ip4_ipsec_output, static) =
{
.arc_name = "ip4-output",
- .node_name = "ipsec-output-ip4",
+ .node_name = "ipsec4-output-feature",
.runs_before = VNET_FEATURES ("interface-output"),
};
{
ethernet_arp_header_t h;
- memset (&h, 0, sizeof (h));
+ clib_memset (&h, 0, sizeof (h));
/* Set target ethernet address to all zeros. */
- memset (h.ip4_over_ethernet[1].ethernet, 0,
- sizeof (h.ip4_over_ethernet[1].ethernet));
+ clib_memset (h.ip4_over_ethernet[1].ethernet, 0,
+ sizeof (h.ip4_over_ethernet[1].ethernet));
#define _16(f,v) h.f = clib_host_to_net_u16 (v);
#define _8(f,v) h.f = v;
vec_elt (im->fib_index_by_sw_if_index,
vnet_buffer (b0)->sw_if_index[VLIB_RX]);
- clib_memcpy (t0->packet_data,
- vlib_buffer_get_current (b0),
- sizeof (t0->packet_data));
+ clib_memcpy_fast (t0->packet_data,
+ vlib_buffer_get_current (b0),
+ sizeof (t0->packet_data));
}
if (b1->flags & VLIB_BUFFER_IS_TRACED)
{
(u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
vec_elt (im->fib_index_by_sw_if_index,
vnet_buffer (b1)->sw_if_index[VLIB_RX]);
- clib_memcpy (t1->packet_data, vlib_buffer_get_current (b1),
- sizeof (t1->packet_data));
+ clib_memcpy_fast (t1->packet_data, vlib_buffer_get_current (b1),
+ sizeof (t1->packet_data));
}
from += 2;
n_left -= 2;
(u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
vec_elt (im->fib_index_by_sw_if_index,
vnet_buffer (b0)->sw_if_index[VLIB_RX]);
- clib_memcpy (t0->packet_data, vlib_buffer_get_current (b0),
- sizeof (t0->packet_data));
+ clib_memcpy_fast (t0->packet_data, vlib_buffer_get_current (b0),
+ sizeof (t0->packet_data));
}
from += 1;
n_left -= 1;
{
.arc_name = "ip4-local",
.start_nodes = VNET_FEATURES ("ip4-local"),
+ .last_in_arc = "ip4-local-end-of-arc",
};
/* *INDENT-ON* */
ip4_address_t src;
u32 lbi;
u8 error;
+ u8 first;
} ip4_local_last_check_t;
static inline void
vnet_buffer (b)->sw_if_index[VLIB_TX] != ~0 ?
vnet_buffer (b)->sw_if_index[VLIB_TX] : vnet_buffer (b)->ip.fib_index;
- if (PREDICT_FALSE (last_check->src.as_u32 != ip0->src_address.as_u32))
+ if (PREDICT_FALSE (last_check->first ||
+ (last_check->src.as_u32 != ip0->src_address.as_u32)))
{
mtrie0 = &ip4_fib_get (vnet_buffer (b)->ip.fib_index)->mtrie;
leaf0 = ip4_fib_mtrie_lookup_step_one (mtrie0, &ip0->src_address);
vnet_buffer (b)->ip.adj_index[VLIB_TX] = last_check->lbi;
vnet_buffer (b)->ip.adj_index[VLIB_RX] = last_check->lbi;
*error0 = last_check->error;
+ last_check->first = 0;
}
}
ip4_fib_mtrie_t *mtrie[2];
const dpo_id_t *dpo[2];
load_balance_t *lb[2];
- u32 not_last_hit = 0;
+ u32 not_last_hit;
u32 lbi[2];
+ not_last_hit = last_check->first;
not_last_hit |= ip[0]->src_address.as_u32 ^ last_check->src.as_u32;
not_last_hit |= ip[1]->src_address.as_u32 ^ last_check->src.as_u32;
error[0] = last_check->error;
error[1] = last_check->error;
+ last_check->first = 0;
+ }
+}
+
+enum ip_local_packet_type_e
+{
+ IP_LOCAL_PACKET_TYPE_L4,
+ IP_LOCAL_PACKET_TYPE_NAT,
+ IP_LOCAL_PACKET_TYPE_FRAG,
+};
+
+/**
+ * Determine packet type and next node.
+ *
+ * The expectation is that all packets that are not L4 will skip
+ * checksums and source checks.
+ */
+always_inline u8
+ip4_local_classify (vlib_buffer_t * b, ip4_header_t * ip, u16 * next)
+{
+ ip_lookup_main_t *lm = &ip4_main.lookup_main;
+
+ if (PREDICT_FALSE (ip4_is_fragment (ip)))
+ {
+ *next = IP_LOCAL_NEXT_REASSEMBLY;
+ return IP_LOCAL_PACKET_TYPE_FRAG;
+ }
+ if (PREDICT_FALSE (b->flags & VNET_BUFFER_F_IS_NATED))
+ {
+ *next = lm->local_next_by_ip_protocol[ip->protocol];
+ return IP_LOCAL_PACKET_TYPE_NAT;
}
+
+ *next = lm->local_next_by_ip_protocol[ip->protocol];
+ return IP_LOCAL_PACKET_TYPE_L4;
}
static inline uword
vlib_node_runtime_t * node,
vlib_frame_t * frame, int head_of_feature_arc)
{
- ip4_main_t *im = &ip4_main;
- ip_lookup_main_t *lm = &im->lookup_main;
u32 *from, n_left_from;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip4_input_node.index);
u16 nexts[VLIB_FRAME_SIZE], *next;
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
ip4_header_t *ip[2];
- u8 error[2];
+ u8 error[2], pt[2];
ip4_local_last_check_t last_check = {
+ /*
+ * 0.0.0.0 can appear as the source address of an IP packet,
+ * as can any other address, hence the need to use the 'first'
+ * member to make sure the .lbi is initialised for the first
+ * packet.
+ */
.src = {.as_u32 = 0},
.lbi = ~0,
- .error = IP4_ERROR_UNKNOWN_PROTOCOL
+ .error = IP4_ERROR_UNKNOWN_PROTOCOL,
+ .first = 1,
};
from = vlib_frame_vector_args (frame);
while (n_left_from >= 6)
{
- u32 is_nat, not_batch = 0;
+ u8 not_batch = 0;
/* Prefetch next iteration. */
{
vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
- is_nat = b[0]->flags & VNET_BUFFER_F_IS_NATED;
- not_batch |= is_nat ^ (b[1]->flags & VNET_BUFFER_F_IS_NATED);
+ pt[0] = ip4_local_classify (b[0], ip[0], &next[0]);
+ pt[1] = ip4_local_classify (b[1], ip[1], &next[1]);
- if (head_of_feature_arc == 0 || (is_nat && not_batch == 0))
+ not_batch = pt[0] ^ pt[1];
+
+ if (head_of_feature_arc == 0 || (pt[0] && not_batch == 0))
goto skip_checks;
if (PREDICT_TRUE (not_batch == 0))
}
else
{
- if (!(b[0]->flags & VNET_BUFFER_F_IS_NATED))
+ if (!pt[0])
{
ip4_local_check_l4_csum (vm, b[0], ip[0], &error[0]);
ip4_local_check_src (b[0], ip[0], &last_check, &error[0]);
}
- if (!(b[1]->flags & VNET_BUFFER_F_IS_NATED))
+ if (!pt[1])
{
ip4_local_check_l4_csum (vm, b[1], ip[1], &error[1]);
ip4_local_check_src (b[1], ip[1], &last_check, &error[1]);
skip_checks:
- next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
- next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
ip4_local_set_next_and_error (error_node, b[0], &next[0], error[0],
head_of_feature_arc);
ip4_local_set_next_and_error (error_node, b[1], &next[1], error[1],
ip[0] = vlib_buffer_get_current (b[0]);
vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
+ pt[0] = ip4_local_classify (b[0], ip[0], &next[0]);
- if (head_of_feature_arc == 0 || (b[0]->flags & VNET_BUFFER_F_IS_NATED))
+ if (head_of_feature_arc == 0 || pt[0])
goto skip_check;
ip4_local_check_l4_csum (vm, b[0], ip[0], &error[0]);
skip_check:
- next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
ip4_local_set_next_and_error (error_node, b[0], &next[0], error[0],
head_of_feature_arc);
[IP_LOCAL_NEXT_PUNT] = "ip4-punt",
[IP_LOCAL_NEXT_UDP_LOOKUP] = "ip4-udp-lookup",
[IP_LOCAL_NEXT_ICMP] = "ip4-icmp-input",
+ [IP_LOCAL_NEXT_REASSEMBLY] = "ip4-reassembly",
},
};
/* *INDENT-ON* */
u32 *from, *to_next_drop;
uword n_left_from, n_left_to_next_drop, next_index;
u32 thread_index = vm->thread_index;
- u32 seed;
- f64 time_now;
+ u64 seed;
if (node->flags & VLIB_NODE_FLAG_TRACE)
ip4_forward_next_trace (vm, node, frame, VLIB_TX);
- time_now = vlib_time_now (vm);
- if (time_now - im->arp_throttle_last_seed_change_time[thread_index] > 1e-3)
- {
- (void) random_u32 (&im->arp_throttle_seeds[thread_index]);
- memset (im->arp_throttle_bitmaps[thread_index], 0,
- ARP_THROTTLE_BITS / BITS (u8));
-
- im->arp_throttle_last_seed_change_time[thread_index] = time_now;
- }
- seed = im->arp_throttle_seeds[thread_index];
+ seed = throttle_seed (&im->arp_throttle, thread_index, vlib_time_now (vm));
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
while (n_left_from > 0 && n_left_to_next_drop > 0)
{
- u32 pi0, adj_index0, r0, w0, sw_if_index0, drop0;
- uword m0;
+ u32 pi0, bi0, adj_index0, sw_if_index0;
ip_adjacency_t *adj0;
- vlib_buffer_t *p0;
- ip4_header_t *ip0;
+ vlib_buffer_t *p0, *b0;
+ ip4_address_t resolve0;
+ ethernet_arp_header_t *h0;
+ vnet_hw_interface_t *hw_if0;
+ u64 r0;
pi0 = from[0];
-
p0 = vlib_get_buffer (vm, pi0);
+ from += 1;
+ n_left_from -= 1;
+ to_next_drop[0] = pi0;
+ to_next_drop += 1;
+ n_left_to_next_drop -= 1;
+
adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
adj0 = adj_get (adj_index0);
- ip0 = vlib_buffer_get_current (p0);
-
- sw_if_index0 = adj0->rewrite_header.sw_if_index;
- vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
- if (PREDICT_TRUE (is_glean))
+ if (is_glean)
{
- /*
- * this is the Glean case, so we are ARPing for the
- * packet's destination
- */
- r0 = ip0->dst_address.data_u32;
+ /* resolve the packet's destination */
+ ip4_header_t *ip0 = vlib_buffer_get_current (p0);
+ resolve0 = ip0->dst_address;
}
else
{
- r0 = adj0->sub_type.nbr.next_hop.ip4.data_u32;
+ /* resolve the incomplete adj */
+ resolve0 = adj0->sub_type.nbr.next_hop.ip4;
}
- r0 ^= seed;
- /* Select bit number */
- r0 &= ARP_THROTTLE_BITS - 1;
- w0 = r0 / BITS (uword);
- m0 = (uword) 1 << (r0 % BITS (uword));
-
- drop0 = (im->arp_throttle_bitmaps[thread_index][w0] & m0) != 0;
- im->arp_throttle_bitmaps[thread_index][w0] |= m0;
-
- from += 1;
- n_left_from -= 1;
- to_next_drop[0] = pi0;
- to_next_drop += 1;
- n_left_to_next_drop -= 1;
+ /* combine the address and interface for the hash key */
+ sw_if_index0 = adj0->rewrite_header.sw_if_index;
+ r0 = (u64) resolve0.data_u32 << 32;
+ r0 |= sw_if_index0;
- p0->error =
- node->errors[drop0 ? IP4_ARP_ERROR_DROP :
- IP4_ARP_ERROR_REQUEST_SENT];
+ if (throttle_check (&im->arp_throttle, thread_index, r0, seed))
+ {
+ p0->error = node->errors[IP4_ARP_ERROR_THROTTLED];
+ continue;
+ }
/*
* the adj has been updated to a rewrite but the node the DPO that got
* us here hasn't - yet. no big deal. we'll drop while we wait.
*/
if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
- continue;
-
- if (drop0)
- continue;
+ {
+ p0->error = node->errors[IP4_ARP_ERROR_RESOLVED];
+ continue;
+ }
/*
* Can happen if the control-plane is programming tables
|| (!is_glean && adj0->lookup_next_index != IP_LOOKUP_NEXT_ARP))
{
p0->error = node->errors[IP4_ARP_ERROR_NON_ARP_ADJ];
+ continue;
}
- else
- /* Send ARP request. */
+ /* Send ARP request. */
+ h0 =
+ vlib_packet_template_get_packet (vm,
+ &im->ip4_arp_request_packet_template,
+ &bi0);
+
+ /* Seems we're out of buffers */
+ if (PREDICT_FALSE (!h0))
{
- u32 bi0 = 0;
- vlib_buffer_t *b0;
- ethernet_arp_header_t *h0;
- vnet_hw_interface_t *hw_if0;
-
- h0 =
- vlib_packet_template_get_packet (vm,
- &im->ip4_arp_request_packet_template,
- &bi0);
-
- /* Seems we're out of buffers */
- if (PREDICT_FALSE (!h0))
- continue;
-
- /* Add rewrite/encap string for ARP packet. */
- vnet_rewrite_one_header (adj0[0], h0,
- sizeof (ethernet_header_t));
+ p0->error = node->errors[IP4_ARP_ERROR_NO_BUFFERS];
+ continue;
+ }
- hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
+ /* Add rewrite/encap string for ARP packet. */
+ vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t));
- /* Src ethernet address in ARP header. */
- clib_memcpy (h0->ip4_over_ethernet[0].ethernet,
- hw_if0->hw_address,
- sizeof (h0->ip4_over_ethernet[0].ethernet));
+ hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
- if (is_glean)
- {
- /* The interface's source address is stashed in the Glean Adj */
- h0->ip4_over_ethernet[0].ip4 =
- adj0->sub_type.glean.receive_addr.ip4;
-
- /* Copy in destination address we are requesting. This is the
- * glean case, so it's the packet's destination.*/
- h0->ip4_over_ethernet[1].ip4.data_u32 =
- ip0->dst_address.data_u32;
- }
- else
+ /* Src ethernet address in ARP header. */
+ clib_memcpy_fast (h0->ip4_over_ethernet[0].ethernet,
+ hw_if0->hw_address,
+ sizeof (h0->ip4_over_ethernet[0].ethernet));
+ if (is_glean)
+ {
+ /* The interface's source address is stashed in the Glean Adj */
+ h0->ip4_over_ethernet[0].ip4 =
+ adj0->sub_type.glean.receive_addr.ip4;
+ }
+ else
+ {
+ /* Src IP address in ARP header. */
+ if (ip4_src_address_for_packet (lm, sw_if_index0,
+ &h0->ip4_over_ethernet[0].ip4))
{
- /* Src IP address in ARP header. */
- if (ip4_src_address_for_packet (lm, sw_if_index0,
- &h0->
- ip4_over_ethernet[0].ip4))
- {
- /* No source address available */
- p0->error =
- node->errors[IP4_ARP_ERROR_NO_SOURCE_ADDRESS];
- vlib_buffer_free (vm, &bi0, 1);
- continue;
- }
-
- /* Copy in destination address we are requesting from the
- incomplete adj */
- h0->ip4_over_ethernet[1].ip4.data_u32 =
- adj0->sub_type.nbr.next_hop.ip4.as_u32;
+ /* No source address available */
+ p0->error = node->errors[IP4_ARP_ERROR_NO_SOURCE_ADDRESS];
+ vlib_buffer_free (vm, &bi0, 1);
+ continue;
}
+ }
+ h0->ip4_over_ethernet[1].ip4 = resolve0;
- vlib_buffer_copy_trace_flag (vm, p0, bi0);
- b0 = vlib_get_buffer (vm, bi0);
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index0;
+ p0->error = node->errors[IP4_ARP_ERROR_REQUEST_SENT];
- vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
+ vlib_buffer_copy_trace_flag (vm, p0, bi0);
+ b0 = vlib_get_buffer (vm, bi0);
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index0;
- vlib_set_next_frame_buffer (vm, node,
- adj0->rewrite_header.next_index,
- bi0);
- }
+ vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
+
+ vlib_set_next_frame_buffer (vm, node,
+ adj0->rewrite_header.next_index, bi0);
}
vlib_put_next_frame (vm, node, IP4_ARP_NEXT_DROP, n_left_to_next_drop);
}
static char *ip4_arp_error_strings[] = {
- [IP4_ARP_ERROR_DROP] = "address overflow drops",
+ [IP4_ARP_ERROR_THROTTLED] = "ARP requests throttled",
+ [IP4_ARP_ERROR_RESOLVED] = "ARP requests resolved",
+ [IP4_ARP_ERROR_NO_BUFFERS] = "ARP requests out of buffer",
[IP4_ARP_ERROR_REQUEST_SENT] = "ARP requests sent",
[IP4_ARP_ERROR_NON_ARP_ADJ] = "ARPs to non-ARP adjacencies",
- [IP4_ARP_ERROR_REPLICATE_DROP] = "ARP replication completed",
- [IP4_ARP_ERROR_REPLICATE_FAIL] = "ARP replication failed",
[IP4_ARP_ERROR_NO_SOURCE_ADDRESS] = "no source address for ARP request",
};
/* *INDENT-ON* */
#define foreach_notrace_ip4_arp_error \
-_(DROP) \
+_(THROTTLED) \
+_(RESOLVED) \
+_(NO_BUFFERS) \
_(REQUEST_SENT) \
-_(REPLICATE_DROP) \
-_(REPLICATE_FAIL)
+_(NON_ARP_ADJ) \
+_(NO_SOURCE_ADDRESS)
static clib_error_t *
arp_notrace_init (vlib_main_t * vm)
sw_if_index);
}
- clib_memcpy (h->ip4_over_ethernet[0].ethernet, hi->hw_address,
- sizeof (h->ip4_over_ethernet[0].ethernet));
+ clib_memcpy_fast (h->ip4_over_ethernet[0].ethernet, hi->hw_address,
+ sizeof (h->ip4_over_ethernet[0].ethernet));
h->ip4_over_ethernet[0].ip4 = src[0];
h->ip4_over_ethernet[1].ip4 = dst[0];
always_inline void
ip4_mtu_check (vlib_buffer_t * b, u16 packet_len,
- u16 adj_packet_bytes, bool df, u32 * next, u32 * error)
+ u16 adj_packet_bytes, bool df, u16 * next, u32 * error)
{
if (packet_len > adj_packet_bytes)
{
else
{
/* IP fragmentation */
- ip_frag_set_vnet_buffer (b, 0, adj_packet_bytes,
+ ip_frag_set_vnet_buffer (b, adj_packet_bytes,
IP4_FRAG_NEXT_IP4_REWRITE, 0);
*next = IP4_REWRITE_NEXT_FRAGMENT;
}
}
}
+/* Decrement TTL & update checksum.
+ Works either endian, so no need for byte swap. */
+static_always_inline void
+ip4_ttl_and_checksum_check (vlib_buffer_t * b, ip4_header_t * ip, u16 * next,
+ u32 * error)
+{
+ i32 ttl;
+ u32 checksum;
+ if (PREDICT_FALSE (b->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED))
+ {
+ b->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
+ return;
+ }
+
+ ttl = ip->ttl;
+
+ /* Input node should have reject packets with ttl 0. */
+ ASSERT (ip->ttl > 0);
+
+ checksum = ip->checksum + clib_host_to_net_u16 (0x0100);
+ checksum += checksum >= 0xffff;
+
+ ip->checksum = checksum;
+ ttl -= 1;
+ ip->ttl = ttl;
+
+ /*
+ * If the ttl drops below 1 when forwarding, generate
+ * an ICMP response.
+ */
+ if (PREDICT_FALSE (ttl <= 0))
+ {
+ *error = IP4_ERROR_TIME_EXPIRED;
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ *next = IP4_REWRITE_NEXT_ICMP_ERROR;
+ }
+
+ /* Verify checksum. */
+ ASSERT ((ip->checksum == ip4_header_checksum (ip)) ||
+ (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM));
+}
+
+
always_inline uword
ip4_rewrite_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
{
ip_lookup_main_t *lm = &ip4_main.lookup_main;
u32 *from = vlib_frame_vector_args (frame);
- u32 n_left_from, n_left_to_next, *to_next, next_index;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
+ u16 nexts[VLIB_FRAME_SIZE], *next;
+ u32 n_left_from;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip4_input_node.index);
n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
u32 thread_index = vm->thread_index;
- while (n_left_from > 0)
- {
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- ip_adjacency_t *adj0, *adj1;
- vlib_buffer_t *p0, *p1;
- ip4_header_t *ip0, *ip1;
- u32 pi0, rw_len0, next0, error0, checksum0, adj_index0;
- u32 pi1, rw_len1, next1, error1, checksum1, adj_index1;
- u32 tx_sw_if_index0, tx_sw_if_index1;
-
- /* 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, STORE);
- vlib_prefetch_buffer_header (p3, STORE);
-
- CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
- CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
- }
-
- pi0 = to_next[0] = from[0];
- pi1 = to_next[1] = from[1];
-
- from += 2;
- n_left_from -= 2;
- to_next += 2;
- n_left_to_next -= 2;
-
- p0 = vlib_get_buffer (vm, pi0);
- p1 = vlib_get_buffer (vm, pi1);
-
- adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
- adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
-
- /*
- * pre-fetch the per-adjacency counters
- */
- if (do_counters)
- {
- vlib_prefetch_combined_counter (&adjacency_counters,
- thread_index, adj_index0);
- vlib_prefetch_combined_counter (&adjacency_counters,
- thread_index, adj_index1);
- }
-
- ip0 = vlib_buffer_get_current (p0);
- ip1 = vlib_buffer_get_current (p1);
-
- error0 = error1 = IP4_ERROR_NONE;
- next0 = next1 = IP4_REWRITE_NEXT_DROP;
-
- /* Decrement TTL & update checksum.
- Works either endian, so no need for byte swap. */
- if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
- {
- i32 ttl0 = ip0->ttl;
-
- /* Input node should have reject packets with ttl 0. */
- ASSERT (ip0->ttl > 0);
-
- checksum0 = ip0->checksum + clib_host_to_net_u16 (0x0100);
- checksum0 += checksum0 >= 0xffff;
-
- ip0->checksum = checksum0;
- ttl0 -= 1;
- ip0->ttl = ttl0;
-
- /*
- * If the ttl drops below 1 when forwarding, generate
- * an ICMP response.
- */
- if (PREDICT_FALSE (ttl0 <= 0))
- {
- error0 = IP4_ERROR_TIME_EXPIRED;
- vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (p0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = IP4_REWRITE_NEXT_ICMP_ERROR;
- }
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+ clib_memset_u16 (nexts, IP4_REWRITE_NEXT_DROP, n_left_from);
- /* Verify checksum. */
- ASSERT ((ip0->checksum == ip4_header_checksum (ip0)) ||
- (p0->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM));
- }
- else
- {
- p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
- }
- if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
- {
- i32 ttl1 = ip1->ttl;
+ if (n_left_from >= 6)
+ {
+ int i;
+ for (i = 2; i < 6; i++)
+ vlib_prefetch_buffer_header (bufs[i], LOAD);
+ }
- /* Input node should have reject packets with ttl 0. */
- ASSERT (ip1->ttl > 0);
+ next = nexts;
+ b = bufs;
+ while (n_left_from >= 8)
+ {
+ ip_adjacency_t *adj0, *adj1;
+ ip4_header_t *ip0, *ip1;
+ u32 rw_len0, error0, adj_index0;
+ u32 rw_len1, error1, adj_index1;
+ u32 tx_sw_if_index0, tx_sw_if_index1;
+ u8 *p;
- checksum1 = ip1->checksum + clib_host_to_net_u16 (0x0100);
- checksum1 += checksum1 >= 0xffff;
+ vlib_prefetch_buffer_header (b[6], LOAD);
+ vlib_prefetch_buffer_header (b[7], LOAD);
- ip1->checksum = checksum1;
- ttl1 -= 1;
- ip1->ttl = ttl1;
+ adj_index0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
+ adj_index1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX];
- /*
- * If the ttl drops below 1 when forwarding, generate
- * an ICMP response.
- */
- if (PREDICT_FALSE (ttl1 <= 0))
- {
- error1 = IP4_ERROR_TIME_EXPIRED;
- vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (p1, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next1 = IP4_REWRITE_NEXT_ICMP_ERROR;
- }
+ /*
+ * pre-fetch the per-adjacency counters
+ */
+ if (do_counters)
+ {
+ vlib_prefetch_combined_counter (&adjacency_counters,
+ thread_index, adj_index0);
+ vlib_prefetch_combined_counter (&adjacency_counters,
+ thread_index, adj_index1);
+ }
- /* Verify checksum. */
- ASSERT ((ip1->checksum == ip4_header_checksum (ip1)) ||
- (p1->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM));
- }
- else
- {
- p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
- }
+ ip0 = vlib_buffer_get_current (b[0]);
+ ip1 = vlib_buffer_get_current (b[1]);
+
+ error0 = error1 = IP4_ERROR_NONE;
+
+ ip4_ttl_and_checksum_check (b[0], ip0, next + 0, &error0);
+ ip4_ttl_and_checksum_check (b[1], ip1, next + 1, &error1);
+
+ /* Rewrite packet header and updates lengths. */
+ adj0 = adj_get (adj_index0);
+ adj1 = adj_get (adj_index1);
+
+ /* Worth pipelining. No guarantee that adj0,1 are hot... */
+ rw_len0 = adj0[0].rewrite_header.data_bytes;
+ rw_len1 = adj1[0].rewrite_header.data_bytes;
+ vnet_buffer (b[0])->ip.save_rewrite_length = rw_len0;
+ vnet_buffer (b[1])->ip.save_rewrite_length = rw_len1;
+
+ p = vlib_buffer_get_current (b[2]);
+ CLIB_PREFETCH (p - CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
+
+ p = vlib_buffer_get_current (b[3]);
+ CLIB_PREFETCH (p - CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
+
+ /* Check MTU of outgoing interface. */
+ ip4_mtu_check (b[0], clib_net_to_host_u16 (ip0->length),
+ adj0[0].rewrite_header.max_l3_packet_bytes,
+ ip0->flags_and_fragment_offset &
+ clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT),
+ next + 0, &error0);
+ ip4_mtu_check (b[1], clib_net_to_host_u16 (ip1->length),
+ adj1[0].rewrite_header.max_l3_packet_bytes,
+ ip1->flags_and_fragment_offset &
+ clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT),
+ next + 1, &error1);
+
+ if (is_mcast)
+ {
+ error0 = ((adj0[0].rewrite_header.sw_if_index ==
+ vnet_buffer (b[0])->sw_if_index[VLIB_RX]) ?
+ IP4_ERROR_SAME_INTERFACE : error0);
+ error1 = ((adj1[0].rewrite_header.sw_if_index ==
+ vnet_buffer (b[1])->sw_if_index[VLIB_RX]) ?
+ IP4_ERROR_SAME_INTERFACE : error1);
+ }
- /* Rewrite packet header and updates lengths. */
- adj0 = adj_get (adj_index0);
- adj1 = adj_get (adj_index1);
-
- /* Worth pipelining. No guarantee that adj0,1 are hot... */
- rw_len0 = adj0[0].rewrite_header.data_bytes;
- rw_len1 = adj1[0].rewrite_header.data_bytes;
- vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
- vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
-
- /* Check MTU of outgoing interface. */
- ip4_mtu_check (p0, clib_net_to_host_u16 (ip0->length),
- adj0[0].rewrite_header.max_l3_packet_bytes,
- ip0->flags_and_fragment_offset &
- clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT),
- &next0, &error0);
- ip4_mtu_check (p1, clib_net_to_host_u16 (ip1->length),
- adj1[0].rewrite_header.max_l3_packet_bytes,
- ip1->flags_and_fragment_offset &
- clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT),
- &next1, &error1);
-
- if (is_mcast)
- {
- error0 = ((adj0[0].rewrite_header.sw_if_index ==
- vnet_buffer (p0)->sw_if_index[VLIB_RX]) ?
- IP4_ERROR_SAME_INTERFACE : error0);
- error1 = ((adj1[0].rewrite_header.sw_if_index ==
- vnet_buffer (p1)->sw_if_index[VLIB_RX]) ?
- IP4_ERROR_SAME_INTERFACE : error1);
- }
+ b[0]->error = error_node->errors[error0];
+ b[1]->error = error_node->errors[error1];
+ /* Don't adjust the buffer for ttl issue; icmp-error node wants
+ * to see the IP headerr */
+ if (PREDICT_TRUE (error0 == IP4_ERROR_NONE))
+ {
+ u32 next_index = adj0[0].rewrite_header.next_index;
+ b[0]->current_data -= rw_len0;
+ b[0]->current_length += rw_len0;
+ tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
+ vnet_buffer (b[0])->sw_if_index[VLIB_TX] = tx_sw_if_index0;
+
+ if (PREDICT_FALSE
+ (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
+ vnet_feature_arc_start (lm->output_feature_arc_index,
+ tx_sw_if_index0, &next_index, b[0]);
+ next[0] = next_index;
+ }
+ if (PREDICT_TRUE (error1 == IP4_ERROR_NONE))
+ {
+ u32 next_index = adj1[0].rewrite_header.next_index;
+ b[1]->current_data -= rw_len1;
+ b[1]->current_length += rw_len1;
+
+ tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
+ vnet_buffer (b[1])->sw_if_index[VLIB_TX] = tx_sw_if_index1;
+
+ if (PREDICT_FALSE
+ (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
+ vnet_feature_arc_start (lm->output_feature_arc_index,
+ tx_sw_if_index1, &next_index, b[1]);
+ next[1] = next_index;
+ }
- p0->error = error_node->errors[error0];
- p1->error = error_node->errors[error1];
- /* Don't adjust the buffer for ttl issue; icmp-error node wants
- * to see the IP headerr */
- if (PREDICT_TRUE (error0 == IP4_ERROR_NONE))
- {
- next0 = adj0[0].rewrite_header.next_index;
- p0->current_data -= rw_len0;
- p0->current_length += rw_len0;
- tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
- vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
-
- if (PREDICT_FALSE
- (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
- vnet_feature_arc_start (lm->output_feature_arc_index,
- tx_sw_if_index0, &next0, p0);
- }
- if (PREDICT_TRUE (error1 == IP4_ERROR_NONE))
- {
- next1 = adj1[0].rewrite_header.next_index;
- p1->current_data -= rw_len1;
- p1->current_length += rw_len1;
+ /* Guess we are only writing on simple Ethernet header. */
+ vnet_rewrite_two_headers (adj0[0], adj1[0],
+ ip0, ip1, sizeof (ethernet_header_t));
- tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
- vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
+ /*
+ * Bump the per-adjacency counters
+ */
+ if (do_counters)
+ {
+ vlib_increment_combined_counter
+ (&adjacency_counters,
+ thread_index,
+ adj_index0, 1, vlib_buffer_length_in_chain (vm, b[0]) + rw_len0);
- if (PREDICT_FALSE
- (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
- vnet_feature_arc_start (lm->output_feature_arc_index,
- tx_sw_if_index1, &next1, p1);
- }
+ vlib_increment_combined_counter
+ (&adjacency_counters,
+ thread_index,
+ adj_index1, 1, vlib_buffer_length_in_chain (vm, b[1]) + rw_len1);
+ }
- /* Guess we are only writing on simple Ethernet header. */
- vnet_rewrite_two_headers (adj0[0], adj1[0],
- ip0, ip1, sizeof (ethernet_header_t));
+ if (is_midchain)
+ {
+ adj0->sub_type.midchain.fixup_func
+ (vm, adj0, b[0], adj0->sub_type.midchain.fixup_data);
+ adj1->sub_type.midchain.fixup_func
+ (vm, adj1, b[1], adj1->sub_type.midchain.fixup_data);
+ }
+ if (is_mcast)
+ {
/*
- * Bump the per-adjacency counters
+ * copy bytes from the IP address into the MAC rewrite
*/
- if (do_counters)
- {
- vlib_increment_combined_counter
- (&adjacency_counters,
- thread_index,
- adj_index0, 1,
- vlib_buffer_length_in_chain (vm, p0) + rw_len0);
-
- vlib_increment_combined_counter
- (&adjacency_counters,
- thread_index,
- adj_index1, 1,
- vlib_buffer_length_in_chain (vm, p1) + rw_len1);
- }
-
- if (is_midchain)
- {
- adj0->sub_type.midchain.fixup_func
- (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
- adj1->sub_type.midchain.fixup_func
- (vm, adj1, p1, adj0->sub_type.midchain.fixup_data);
- }
- if (is_mcast)
- {
- /*
- * copy bytes from the IP address into the MAC rewrite
- */
- vnet_ip_mcast_fixup_header (IP4_MCAST_ADDR_MASK,
- adj0->
- rewrite_header.dst_mcast_offset,
- &ip0->dst_address.as_u32,
- (u8 *) ip0);
- vnet_ip_mcast_fixup_header (IP4_MCAST_ADDR_MASK,
- adj0->
- rewrite_header.dst_mcast_offset,
- &ip1->dst_address.as_u32,
- (u8 *) ip1);
- }
-
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- pi0, pi1, next0, next1);
+ vnet_ip_mcast_fixup_header (IP4_MCAST_ADDR_MASK,
+ adj0->rewrite_header.dst_mcast_offset,
+ &ip0->dst_address.as_u32, (u8 *) ip0);
+ vnet_ip_mcast_fixup_header (IP4_MCAST_ADDR_MASK,
+ adj1->rewrite_header.dst_mcast_offset,
+ &ip1->dst_address.as_u32, (u8 *) ip1);
}
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- ip_adjacency_t *adj0;
- vlib_buffer_t *p0;
- ip4_header_t *ip0;
- u32 pi0, rw_len0, adj_index0, next0, error0, checksum0;
- u32 tx_sw_if_index0;
-
- pi0 = to_next[0] = from[0];
-
- p0 = vlib_get_buffer (vm, pi0);
-
- adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
-
- adj0 = adj_get (adj_index0);
-
- ip0 = vlib_buffer_get_current (p0);
-
- error0 = IP4_ERROR_NONE;
- next0 = IP4_REWRITE_NEXT_DROP; /* drop on error */
-
- /* Decrement TTL & update checksum. */
- if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
- {
- i32 ttl0 = ip0->ttl;
-
- checksum0 = ip0->checksum + clib_host_to_net_u16 (0x0100);
-
- checksum0 += checksum0 >= 0xffff;
-
- ip0->checksum = checksum0;
-
- ASSERT (ip0->ttl > 0);
-
- ttl0 -= 1;
+ next += 2;
+ b += 2;
+ n_left_from -= 2;
+ }
- ip0->ttl = ttl0;
+ while (n_left_from > 0)
+ {
+ ip_adjacency_t *adj0;
+ ip4_header_t *ip0;
+ u32 rw_len0, adj_index0, error0;
+ u32 tx_sw_if_index0;
- ASSERT ((ip0->checksum == ip4_header_checksum (ip0)) ||
- (p0->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM));
+ adj_index0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
- if (PREDICT_FALSE (ttl0 <= 0))
- {
- /*
- * If the ttl drops below 1 when forwarding, generate
- * an ICMP response.
- */
- error0 = IP4_ERROR_TIME_EXPIRED;
- next0 = IP4_REWRITE_NEXT_ICMP_ERROR;
- vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (p0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- }
- }
- else
- {
- p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
- }
+ adj0 = adj_get (adj_index0);
- if (do_counters)
- vlib_prefetch_combined_counter (&adjacency_counters,
- thread_index, adj_index0);
+ if (do_counters)
+ vlib_prefetch_combined_counter (&adjacency_counters,
+ thread_index, adj_index0);
- /* Guess we are only writing on simple Ethernet header. */
- vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
- if (is_mcast)
- {
- /*
- * copy bytes from the IP address into the MAC rewrite
- */
- vnet_ip_mcast_fixup_header (IP4_MCAST_ADDR_MASK,
- adj0->
- rewrite_header.dst_mcast_offset,
- &ip0->dst_address.as_u32,
- (u8 *) ip0);
- }
+ ip0 = vlib_buffer_get_current (b[0]);
- /* Update packet buffer attributes/set output interface. */
- rw_len0 = adj0[0].rewrite_header.data_bytes;
- vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
+ error0 = IP4_ERROR_NONE;
- if (do_counters)
- vlib_increment_combined_counter
- (&adjacency_counters,
- thread_index, adj_index0, 1,
- vlib_buffer_length_in_chain (vm, p0) + rw_len0);
+ ip4_ttl_and_checksum_check (b[0], ip0, next + 0, &error0);
- /* Check MTU of outgoing interface. */
- ip4_mtu_check (p0, clib_net_to_host_u16 (ip0->length),
- adj0[0].rewrite_header.max_l3_packet_bytes,
- ip0->flags_and_fragment_offset &
- clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT),
- &next0, &error0);
- if (is_mcast)
- {
- error0 = ((adj0[0].rewrite_header.sw_if_index ==
- vnet_buffer (p0)->sw_if_index[VLIB_RX]) ?
- IP4_ERROR_SAME_INTERFACE : error0);
- }
- p0->error = error_node->errors[error0];
+ /* Update packet buffer attributes/set output interface. */
+ rw_len0 = adj0[0].rewrite_header.data_bytes;
+ vnet_buffer (b[0])->ip.save_rewrite_length = rw_len0;
- /* Don't adjust the buffer for ttl issue; icmp-error node wants
- * to see the IP headerr */
- if (PREDICT_TRUE (error0 == IP4_ERROR_NONE))
- {
- p0->current_data -= rw_len0;
- p0->current_length += rw_len0;
- tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
+ /* Check MTU of outgoing interface. */
+ ip4_mtu_check (b[0], clib_net_to_host_u16 (ip0->length),
+ adj0[0].rewrite_header.max_l3_packet_bytes,
+ ip0->flags_and_fragment_offset &
+ clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT),
+ next + 0, &error0);
- vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
- next0 = adj0[0].rewrite_header.next_index;
+ if (is_mcast)
+ {
+ error0 = ((adj0[0].rewrite_header.sw_if_index ==
+ vnet_buffer (b[0])->sw_if_index[VLIB_RX]) ?
+ IP4_ERROR_SAME_INTERFACE : error0);
+ }
+ b[0]->error = error_node->errors[error0];
- if (is_midchain)
- {
- adj0->sub_type.midchain.fixup_func
- (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
- }
+ /* Don't adjust the buffer for ttl issue; icmp-error node wants
+ * to see the IP headerr */
+ if (PREDICT_TRUE (error0 == IP4_ERROR_NONE))
+ {
+ u32 next_index = adj0[0].rewrite_header.next_index;
+ b[0]->current_data -= rw_len0;
+ b[0]->current_length += rw_len0;
+ tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
+ vnet_buffer (b[0])->sw_if_index[VLIB_TX] = tx_sw_if_index0;
+
+ if (PREDICT_FALSE
+ (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
+ vnet_feature_arc_start (lm->output_feature_arc_index,
+ tx_sw_if_index0, &next_index, b[0]);
+ next[0] = next_index;
+ }
- if (PREDICT_FALSE
- (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
- vnet_feature_arc_start (lm->output_feature_arc_index,
- tx_sw_if_index0, &next0, p0);
+ /* Guess we are only writing on simple Ethernet header. */
+ vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
- }
+ if (do_counters)
+ vlib_increment_combined_counter
+ (&adjacency_counters,
+ thread_index, adj_index0, 1,
+ vlib_buffer_length_in_chain (vm, b[0]) + rw_len0);
- from += 1;
- n_left_from -= 1;
- to_next += 1;
- n_left_to_next -= 1;
+ if (is_midchain)
+ {
+ adj0->sub_type.midchain.fixup_func
+ (vm, adj0, b[0], adj0->sub_type.midchain.fixup_data);
+ }
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- pi0, next0);
+ if (is_mcast)
+ {
+ /*
+ * copy bytes from the IP address into the MAC rewrite
+ */
+ vnet_ip_mcast_fixup_header (IP4_MCAST_ADDR_MASK,
+ adj0->rewrite_header.dst_mcast_offset,
+ &ip0->dst_address.as_u32, (u8 *) ip0);
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ next += 1;
+ b += 1;
+ n_left_from -= 1;
}
+
/* Need to do trace after rewrites to pick up new packet data. */
if (node->flags & VLIB_NODE_FLAG_TRACE)
ip4_forward_next_trace (vm, node, frame, VLIB_TX);
+ vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
return frame->n_vectors;
}
Code Review / vpp.git / blobdiff