static int
arp_unnumbered (vlib_buffer_t * p0,
- u32 pi0,
- ethernet_header_t * eth0,
u32 input_sw_if_index, u32 conn_sw_if_index)
{
- vlib_main_t *vm = vlib_get_main ();
vnet_main_t *vnm = vnet_get_main ();
vnet_interface_main_t *vim = &vnm->interface_main;
vnet_sw_interface_t *si;
- vnet_hw_interface_t *hi;
- u32 *buffers = 0;
- vlib_buffer_t *b0;
- int i;
- u8 dst_mac_address[6];
- i16 header_size;
- ethernet_arp_header_t *arp0;
/* verify that the input interface is unnumbered to the connected.
* the connected interface is the interface on which the subnet is
return 0;
}
- /* Save the dst mac address */
- clib_memcpy (dst_mac_address, eth0->dst_address, sizeof (dst_mac_address));
-
- vec_insert (buffers, 1, 0);
- buffers[0] = pi0;
-
- for (i = 0; i < vec_len (buffers); i++)
- {
- b0 = vlib_get_buffer (vm, buffers[i]);
- arp0 = vlib_buffer_get_current (b0);
-
- hi = vnet_get_sup_hw_interface (vnm, input_sw_if_index);
- si = vnet_get_sw_interface (vnm, input_sw_if_index);
-
- /* For decoration, most likely */
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = hi->sw_if_index;
-
- /* Fix ARP pkt src address */
- clib_memcpy (arp0->ip4_over_ethernet[0].ethernet, hi->hw_address, 6);
-
- /* Build L2 encaps for this swif */
- header_size = sizeof (ethernet_header_t);
- if (si->sub.eth.flags.one_tag)
- header_size += 4;
- else if (si->sub.eth.flags.two_tags)
- header_size += 8;
-
- vlib_buffer_advance (b0, -header_size);
- eth0 = vlib_buffer_get_current (b0);
-
- if (si->sub.eth.flags.one_tag)
- {
- ethernet_vlan_header_t *outer = (void *) (eth0 + 1);
-
- eth0->type = si->sub.eth.flags.dot1ad ?
- clib_host_to_net_u16 (ETHERNET_TYPE_DOT1AD) :
- clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
- outer->priority_cfi_and_id =
- clib_host_to_net_u16 (si->sub.eth.outer_vlan_id);
- outer->type = clib_host_to_net_u16 (ETHERNET_TYPE_ARP);
-
- }
- else if (si->sub.eth.flags.two_tags)
- {
- ethernet_vlan_header_t *outer = (void *) (eth0 + 1);
- ethernet_vlan_header_t *inner = (void *) (outer + 1);
-
- eth0->type = si->sub.eth.flags.dot1ad ?
- clib_host_to_net_u16 (ETHERNET_TYPE_DOT1AD) :
- clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
- outer->priority_cfi_and_id =
- clib_host_to_net_u16 (si->sub.eth.outer_vlan_id);
- outer->type = clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
- inner->priority_cfi_and_id =
- clib_host_to_net_u16 (si->sub.eth.inner_vlan_id);
- inner->type = clib_host_to_net_u16 (ETHERNET_TYPE_ARP);
-
- }
- else
- {
- eth0->type = clib_host_to_net_u16 (ETHERNET_TYPE_ARP);
- }
-
- /* Restore the original dst address, set src address */
- clib_memcpy (eth0->dst_address, dst_mac_address,
- sizeof (eth0->dst_address));
- clib_memcpy (eth0->src_address, hi->hw_address,
- sizeof (eth0->src_address));
-
- /* Transmit replicas */
- if (i > 0)
- {
- vlib_frame_t *f =
- vlib_get_frame_to_node (vm, hi->output_node_index);
- u32 *to_next = vlib_frame_vector_args (f);
- to_next[0] = buffers[i];
- f->n_vectors = 1;
- vlib_put_frame_to_node (vm, hi->output_node_index, f);
- }
- }
-
- /* The regular path outputs the original pkt.. */
- vnet_buffer (p0)->sw_if_index[VLIB_TX] = input_sw_if_index;
-
- vec_free (buffers);
-
return !0;
}
vlib_buffer_t *p0;
vnet_hw_interface_t *hw_if0;
ethernet_arp_header_t *arp0;
- ethernet_header_t *eth0;
+ ethernet_header_t *eth_rx, *eth_tx;
ip4_address_t *if_addr0, proxy_src;
u32 pi0, error0, next0, sw_if_index0, conn_sw_if_index0, fib_index0;
u8 is_request0, dst_is_local0, is_unnum0, is_vrrp_reply0;
fib_node_index_t dst_fei, src_fei;
fib_prefix_t pfx0;
fib_entry_flag_t src_flags, dst_flags;
+ ip_adjacency_t *adj0 = NULL;
+ adj_index_t ai;
pi0 = from[0];
to_next[0] = pi0;
p0 = vlib_get_buffer (vm, pi0);
arp0 = vlib_buffer_get_current (p0);
+ /* Fill in ethernet header. */
+ eth_rx = ethernet_buffer_get_header (p0);
is_request0 = arp0->opcode
== clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request);
error0 = ETHERNET_ARP_ERROR_l3_src_address_not_local;
goto drop2;
}
+
if (sw_if_index0 != fib_entry_get_resolving_interface (src_fei))
{
/*
fib_entry_get_prefix (dst_fei, &pfx0);
if_addr0 = &pfx0.fp_addr.ip4;
- /* Fill in ethernet header. */
- eth0 = ethernet_buffer_get_header (p0);
-
is_vrrp_reply0 =
((arp0->opcode ==
clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply))
/* Trash ARP packets whose ARP-level source addresses do not
match their L2-frame-level source addresses, unless it's
a reply from a VRRP virtual router */
- if (memcmp (eth0->src_address, arp0->ip4_over_ethernet[0].ethernet,
- sizeof (eth0->src_address)) && !is_vrrp_reply0)
+ if (memcmp
+ (eth_rx->src_address, arp0->ip4_over_ethernet[0].ethernet,
+ sizeof (eth_rx->src_address)) && !is_vrrp_reply0)
{
error0 = ETHERNET_ARP_ERROR_l2_address_mismatch;
goto drop2;
/* Send a reply. */
send_reply:
+ ai = fib_entry_get_adj (src_fei);
+ if (ADJ_INDEX_INVALID != ai)
+ {
+ adj0 = adj_get (ai);
+ }
+ else
+ {
+ error0 = ETHERNET_ARP_ERROR_missing_interface_address;
+ goto drop2;
+ }
+ /* Figure out how much to rewind current data from adjacency. */
+ vlib_buffer_advance (p0, -adj0->rewrite_header.data_bytes);
+ eth_tx = vlib_buffer_get_current (p0);
+
vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
/* Hardware must be ethernet-like. */
ASSERT (vec_len (hw_if0->hw_address) == 6);
- clib_memcpy (eth0->dst_address, eth0->src_address, 6);
- clib_memcpy (eth0->src_address, hw_if0->hw_address, 6);
+ /* the rx nd tx ethernet headers wil overlap in the case
+ * when we received a tagged VLAN=0 packet, but we are sending
+ * back untagged */
+ memmove (eth_tx->dst_address, eth_rx->src_address, 6);
+ clib_memcpy (eth_tx->src_address, hw_if0->hw_address, 6);
- /* Figure out how much to rewind current data from adjacency. */
- /* get the adj from the destination's covering connected */
if (NULL == pa)
{
if (is_unnum0)
{
- if (!arp_unnumbered (p0, pi0, eth0,
- sw_if_index0, conn_sw_if_index0))
+ if (!arp_unnumbered (p0, sw_if_index0, conn_sw_if_index0))
goto drop2;
}
- else
- {
- ip_adjacency_t *adj0 = NULL;
- adj_index_t ai;
-
- if (FIB_ENTRY_FLAG_ATTACHED & src_flags)
- {
- /*
- * If the source is attached use the adj from that source.
- */
- ai = fib_entry_get_adj (src_fei);
- if (ADJ_INDEX_INVALID != ai)
- {
- adj0 = adj_get (ai);
- }
- }
- else
- {
- /*
- * Get the glean adj from the cover. This is presumably interface
- * sourced, and therefre needs to be a glean adj.
- */
- ai = fib_entry_get_adj_for_source
- (ip4_fib_table_lookup
- (ip4_fib_get (fib_index0),
- &arp0->ip4_over_ethernet[1].ip4, 31),
- FIB_SOURCE_INTERFACE);
-
- if (ADJ_INDEX_INVALID != ai)
- {
- adj0 = adj_get (ai);
-
- if (adj0->lookup_next_index == IP_LOOKUP_NEXT_GLEAN)
- {
- adj0 = NULL;
- }
- }
- }
- if (NULL != adj0)
- {
- vlib_buffer_advance (p0,
- -adj0->rewrite_header.data_bytes);
- }
- else
- {
- error0 = ETHERNET_ARP_ERROR_missing_interface_address;
- goto drop2;
- }
- }
}
/* We are going to reply to this request, so learn the sender */
if ((this_addr >= lo_addr && this_addr <= hi_addr) &&
(fib_index0 == pa->fib_index))
{
- eth0 = ethernet_buffer_get_header (p0);
proxy_src.as_u32 =
arp0->ip4_over_ethernet[1].ip4.data_u32;
/*
- * Rewind buffer, direct code above not to
- * think too hard about it.
+ * change the interface address to the proxied
*/
if_addr0 = &proxy_src;
is_unnum0 = 0;
- i32 ethernet_start =
- vnet_buffer (p0)->ethernet.start_of_ethernet_header;
- i32 rewind = p0->current_data - ethernet_start;
- vlib_buffer_advance (p0, -rewind);
n_proxy_arp_replies_sent++;
goto send_reply;
}
Code Review / vpp.git / blobdiff