fib_index = table_index_or_id;
if (! (flags & IP6_ROUTE_FLAG_FIB_INDEX))
{
+ if (table_index_or_id == ~0) {
+ table_index_or_id = 0;
+ while (hash_get (im->fib_index_by_table_id, table_index_or_id)) {
+ table_index_or_id++;
+ }
+ return create_fib_with_table_id (im, table_index_or_id);
+ }
+
p = hash_get (im->fib_index_by_table_id, table_index_or_id);
if (! p)
return create_fib_with_table_id (im, table_index_or_id);
}
/* Avoid spurious reference count increments */
- if (old_adj_index == adj_index && !(a->flags & IP6_ROUTE_FLAG_KEEP_OLD_ADJACENCY))
+ if (old_adj_index == adj_index
+ && adj_index != ~0
+ && !(a->flags & IP6_ROUTE_FLAG_KEEP_OLD_ADJACENCY))
{
ip_adjacency_t * adj = ip_get_adjacency (lm, adj_index);
if (adj->share_count > 0)
ip6_adjacency_set_interface_route (vnm, adj,
next_hop_sw_if_index, ~0);
ip_call_add_del_adjacency_callbacks
- (lm, next_hop_sw_if_index, /* is_del */ 0);
+ (lm, nh_adj_index, /* is_del */ 0);
hash_set (im->interface_route_adj_index_by_sw_if_index,
next_hop_sw_if_index, nh_adj_index);
}
}
else
{
- vnm->api_errno = VNET_API_ERROR_UNKNOWN_DESTINATION;
- error = clib_error_return (0, "next-hop %U/128 not in FIB",
- format_ip6_address, next_hop);
- goto done;
+ ip_adjacency_t add_adj;
+ memset (&add_adj, 0, sizeof(add_adj));
+ add_adj.n_adj = 1;
+ add_adj.lookup_next_index = IP_LOOKUP_NEXT_INDIRECT;
+ add_adj.indirect.next_hop.ip6.as_u64[0] = next_hop->as_u64[0];
+ add_adj.indirect.next_hop.ip6.as_u64[1] = next_hop->as_u64[1];
+ add_adj.explicit_fib_index = explicit_fib_index;
+ ip_add_adjacency (lm, &add_adj, 1, &nh_adj_index);
}
}
else
ip6_maybe_remap_adjacencies (im, table_index_or_table_id, flags);
}
-static uword
-ip6_lookup (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+void
+ip6_forward_next_trace (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame,
+ vlib_rx_or_tx_t which_adj_index);
+
+always_inline uword
+ip6_lookup_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame,
+ int is_indirect)
{
ip6_main_t * im = &ip6_main;
ip_lookup_main_t * lm = &im->lookup_main;
ip_lookup_next_t next0, next1;
ip6_header_t * ip0, * ip1;
ip_adjacency_t * adj0, * adj1;
+ ip6_address_t * dst_addr0, * dst_addr1;
u32 fib_index0, fib_index1;
u32 flow_hash_config0, flow_hash_config1;
ip0 = vlib_buffer_get_current (p0);
ip1 = vlib_buffer_get_current (p1);
+ if (is_indirect)
+ {
+ ip_adjacency_t * iadj0, * iadj1;
+ iadj0 = ip_get_adjacency (lm, vnet_buffer(p0)->ip.adj_index[VLIB_TX]);
+ iadj1 = ip_get_adjacency (lm, vnet_buffer(p1)->ip.adj_index[VLIB_TX]);
+ dst_addr0 = &iadj0->indirect.next_hop.ip6;
+ dst_addr1 = &iadj1->indirect.next_hop.ip6;
+ }
+ else
+ {
+ dst_addr0 = &ip0->dst_address;
+ dst_addr1 = &ip1->dst_address;
+ }
+
fib_index0 = vec_elt (im->fib_index_by_sw_if_index, vnet_buffer (p0)->sw_if_index[VLIB_RX]);
fib_index1 = vec_elt (im->fib_index_by_sw_if_index, vnet_buffer (p1)->sw_if_index[VLIB_RX]);
fib_index1 = (vnet_buffer(p1)->sw_if_index[VLIB_TX] == (u32)~0) ?
fib_index1 : vnet_buffer(p1)->sw_if_index[VLIB_TX];
- adj_index0 = ip6_fib_lookup_with_table (im, fib_index0,
- &ip0->dst_address);
- adj_index1 = ip6_fib_lookup_with_table (im, fib_index1,
- &ip1->dst_address);
+ adj_index0 = ip6_fib_lookup_with_table (im, fib_index0, dst_addr0);
+ adj_index1 = ip6_fib_lookup_with_table (im, fib_index1, dst_addr1);
adj0 = ip_get_adjacency (lm, adj_index0);
adj1 = ip_get_adjacency (lm, adj_index1);
if (PREDICT_FALSE (adj0->explicit_fib_index != ~0))
{
adj_index0 = ip6_fib_lookup_with_table
- (im, adj0->explicit_fib_index, &ip0->dst_address);
+ (im, adj0->explicit_fib_index, dst_addr0);
adj0 = ip_get_adjacency (lm, adj_index0);
}
if (PREDICT_FALSE (adj1->explicit_fib_index != ~0))
{
adj_index1 = ip6_fib_lookup_with_table
- (im, adj1->explicit_fib_index, &ip1->dst_address);
+ (im, adj1->explicit_fib_index, dst_addr1);
adj1 = ip_get_adjacency (lm, adj_index1);
}
next0 = adj0->lookup_next_index;
next1 = adj1->lookup_next_index;
- /* Process hop-by-hop options if present */
- next0 = (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) ?
- IP_LOOKUP_NEXT_HOP_BY_HOP : next0;
- next1 = (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) ?
- IP_LOOKUP_NEXT_HOP_BY_HOP : next1;
+ /* Only process the HBH Option Header if explicitly configured to do so */
+ next0 = (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) && im->hbh_enabled &&
+ adj_index0 ? IP6_LOOKUP_NEXT_HOP_BY_HOP : adj0->lookup_next_index;
+ next1 = (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) && im->hbh_enabled &&
+ adj_index1 ? IP6_LOOKUP_NEXT_HOP_BY_HOP : adj1->lookup_next_index;
vnet_buffer (p0)->ip.flow_hash =
vnet_buffer(p1)->ip.flow_hash = 0;
u32 pi0, adj_index0;
ip_lookup_next_t next0;
ip_adjacency_t * adj0;
+ ip6_address_t * dst_addr0;
u32 fib_index0, flow_hash_config0;
pi0 = from[0];
ip0 = vlib_buffer_get_current (p0);
+ if (is_indirect)
+ {
+ ip_adjacency_t * iadj0;
+ iadj0 = ip_get_adjacency (lm, vnet_buffer(p0)->ip.adj_index[VLIB_TX]);
+ dst_addr0 = &iadj0->indirect.next_hop.ip6;
+ }
+ else
+ {
+ dst_addr0 = &ip0->dst_address;
+ }
+
fib_index0 = vec_elt (im->fib_index_by_sw_if_index, vnet_buffer (p0)->sw_if_index[VLIB_RX]);
fib_index0 = (vnet_buffer(p0)->sw_if_index[VLIB_TX] == (u32)~0) ?
fib_index0 : vnet_buffer(p0)->sw_if_index[VLIB_TX];
flow_hash_config0 =
vec_elt_at_index (im->fibs,fib_index0)->flow_hash_config;
- adj_index0 = ip6_fib_lookup_with_table (im, fib_index0,
- &ip0->dst_address);
+ adj_index0 = ip6_fib_lookup_with_table (im, fib_index0, dst_addr0);
adj0 = ip_get_adjacency (lm, adj_index0);
if (PREDICT_FALSE (adj0->explicit_fib_index != ~0))
{
- adj_index0 = ip6_fib_lookup_with_table
- (im, adj0->explicit_fib_index, &ip0->dst_address);
+ adj_index0 = ip6_fib_lookup_with_table
+ (im, adj0->explicit_fib_index, dst_addr0);
adj0 = ip_get_adjacency (lm, adj_index0);
}
- next0 = adj0->lookup_next_index;
- next0 = (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) ?
- IP_LOOKUP_NEXT_HOP_BY_HOP : next0;
+ /* Only process the HBH Option Header if explicitly configured to do so */
+ next0 = (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) && im->hbh_enabled &&
+ adj_index0 ? IP6_LOOKUP_NEXT_HOP_BY_HOP : adj0->lookup_next_index;
vnet_buffer (p0)->ip.flow_hash = 0;
vlib_put_next_frame (vm, node, next, n_left_to_next);
}
+ if (node->flags & VLIB_NODE_FLAG_TRACE)
+ ip6_forward_next_trace(vm, node, frame, VLIB_TX);
+
return frame->n_vectors;
}
VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
+/* Built-in ip6 unicast rx feature path definition */
+VNET_IP6_UNICAST_FEATURE_INIT (ip6_inacl, static) = {
+ .node_name = "ip6-inacl",
+ .runs_before = {"ipsec-input-ip6", 0},
+ .feature_index = &ip6_main.ip6_unicast_rx_feature_check_access,
+};
+
+VNET_IP6_UNICAST_FEATURE_INIT (ip6_ipsec, static) = {
+ .node_name = "ipsec-input-ip6",
+ .runs_before = {"l2tp-decap", 0},
+ .feature_index = &ip6_main.ip6_unicast_rx_feature_ipsec,
+};
+
+VNET_IP6_UNICAST_FEATURE_INIT (ip6_l2tp, static) = {
+ .node_name = "l2tp-decap",
+ .runs_before = {"vpath-input-ip6", 0},
+ .feature_index = &ip6_main.ip6_unicast_rx_feature_l2tp_decap,
+};
+
+VNET_IP6_UNICAST_FEATURE_INIT (ip6_vpath, static) = {
+ .node_name = "vpath-input-ip6",
+ .runs_before = {"ip6-lookup", 0},
+ .feature_index = &ip6_main.ip6_unicast_rx_feature_vpath,
+};
+
+VNET_IP6_UNICAST_FEATURE_INIT (ip6_lookup, static) = {
+ .node_name = "ip6-lookup",
+ .runs_before = {0}, /* not before any other features */
+ .feature_index = &ip6_main.ip6_unicast_rx_feature_lookup,
+};
+
+/* Built-in ip6 multicast rx feature path definition (none now) */
+VNET_IP6_MULTICAST_FEATURE_INIT (ip4_vpath_mc, static) = {
+ .node_name = "vpath-input-ip6",
+ .runs_before = {"ip6-lookup", 0},
+ .feature_index = &ip6_main.ip6_multicast_rx_feature_vpath,
+};
+
+VNET_IP6_MULTICAST_FEATURE_INIT (ip6_lookup, static) = {
+ .node_name = "ip6-lookup",
+ .runs_before = {0}, /* not before any other features */
+ .feature_index = &ip6_main.ip6_multicast_rx_feature_lookup,
+};
+
+static char * feature_start_nodes[] =
+ {"ip6-input"};
+
+static clib_error_t *
+ip6_feature_init (vlib_main_t * vm, ip6_main_t * im)
+{
+ ip_lookup_main_t * lm = &im->lookup_main;
+ clib_error_t * error;
+ vnet_cast_t cast;
+
+ for (cast = 0; cast < VNET_N_CAST; cast++)
+ {
+ ip_config_main_t * cm = &lm->rx_config_mains[cast];
+ vnet_config_main_t * vcm = &cm->config_main;
+
+ if ((error = ip_feature_init_cast (vm, cm, vcm,
+ feature_start_nodes,
+ ARRAY_LEN(feature_start_nodes),
+ cast,
+ 0 /* is_ip4 */)))
+ return error;
+ }
+ return 0;
+}
+
clib_error_t *
ip6_sw_interface_add_del (vnet_main_t * vnm,
u32 sw_if_index,
ip6_main_t * im = &ip6_main;
ip_lookup_main_t * lm = &im->lookup_main;
u32 ci, cast;
+ u32 feature_index;
for (cast = 0; cast < VNET_N_CAST; cast++)
{
ip_config_main_t * cm = &lm->rx_config_mains[cast];
vnet_config_main_t * vcm = &cm->config_main;
- /* FIXME multicast. */
- if (! vcm->node_index_by_feature_index)
- {
- char * start_nodes[] = { "ip6-input", };
- char * feature_nodes[] = {
- [IP6_RX_FEATURE_CHECK_ACCESS] = "ip6-inacl",
- [IP6_RX_FEATURE_IPSEC] = "ipsec-input-ip6",
- [IP6_RX_FEATURE_L2TPV3] = "l2tp-decap",
- [IP6_RX_FEATURE_VPATH] = "vpath-input-ip6",
- [IP6_RX_FEATURE_LOOKUP] = "ip6-lookup",
- };
- vnet_config_init (vm, vcm,
- start_nodes, ARRAY_LEN (start_nodes),
- feature_nodes, ARRAY_LEN (feature_nodes));
- }
-
vec_validate_init_empty (cm->config_index_by_sw_if_index, sw_if_index, ~0);
ci = cm->config_index_by_sw_if_index[sw_if_index];
+ if (cast == VNET_UNICAST)
+ feature_index = im->ip6_unicast_rx_feature_lookup;
+ else
+ feature_index = im->ip6_multicast_rx_feature_lookup;
+
if (is_add)
ci = vnet_config_add_feature (vm, vcm,
ci,
- IP6_RX_FEATURE_LOOKUP,
+ feature_index,
/* config data */ 0,
/* # bytes of config data */ 0);
else
ci = vnet_config_del_feature (vm, vcm,
ci,
- IP6_RX_FEATURE_LOOKUP,
+ feature_index,
/* config data */ 0,
/* # bytes of config data */ 0);
VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
+static uword
+ip6_lookup (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip6_lookup_inline (vm, node, frame, /* is_indirect */ 0);
+}
+
+static u8 * format_ip6_lookup_trace (u8 * s, va_list * args);
+
VLIB_REGISTER_NODE (ip6_lookup_node) = {
.function = ip6_lookup,
.name = "ip6-lookup",
.vector_size = sizeof (u32),
- .n_next_nodes = IP_LOOKUP_N_NEXT,
+ .format_trace = format_ip6_lookup_trace,
+
+ .n_next_nodes = IP6_LOOKUP_N_NEXT,
.next_nodes = IP6_LOOKUP_NEXT_NODES,
};
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup)
+
+static uword
+ip6_indirect (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip6_lookup_inline (vm, node, frame, /* is_indirect */ 1);
+}
+
+
+VLIB_REGISTER_NODE (ip6_indirect_node) = {
+ .function = ip6_indirect,
+ .name = "ip6-indirect",
+ .vector_size = sizeof (u32),
+ .sibling_of = "ip6-lookup",
+ .format_trace = format_ip6_lookup_trace,
+ .n_next_nodes = 0,
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_indirect_node, ip6_indirect)
+
typedef struct {
/* Adjacency taken. */
u32 adj_index;
u32 fib_index;
/* Packet data, possibly *after* rewrite. */
- u8 packet_data[64 - 1*sizeof(u32)];
+ u8 packet_data[128 - 1*sizeof(u32)];
} ip6_forward_next_trace_t;
static u8 * format_ip6_forward_next_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 *);
+ ip6_forward_next_trace_t * t = va_arg (*args, ip6_forward_next_trace_t *);
+ uword indent = format_get_indent (s);
+
+ s = format(s, "%U%U",
+ format_white_space, indent,
+ format_ip6_header, t->packet_data);
+ return s;
+}
+
+static u8 * format_ip6_lookup_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 *);
ip6_forward_next_trace_t * t = va_arg (*args, ip6_forward_next_trace_t *);
vnet_main_t * vnm = vnet_get_main();
ip6_main_t * im = &ip6_main;
- ip_adjacency_t * adj;
uword indent = format_get_indent (s);
- adj = ip_get_adjacency (&im->lookup_main, t->adj_index);
s = format (s, "fib %d adj-idx %d : %U flow hash: 0x%08x",
- t->fib_index, t->adj_index, format_ip_adjacency,
- vnm, &im->lookup_main, t->adj_index, t->flow_hash);
- switch (adj->lookup_next_index)
- {
- case IP_LOOKUP_NEXT_REWRITE:
- s = format (s, "\n%U%U",
- format_white_space, indent,
- format_ip_adjacency_packet_data,
- vnm, &im->lookup_main, t->adj_index,
- t->packet_data, sizeof (t->packet_data));
- break;
+ t->fib_index, t->adj_index, format_ip_adjacency,
+ vnm, &im->lookup_main, t->adj_index, t->flow_hash);
+ s = format(s, "\n%U%U",
+ format_white_space, indent,
+ format_ip6_header, t->packet_data);
+ return s;
+}
- default:
- break;
- }
+static u8 * format_ip6_rewrite_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 *);
+ ip6_forward_next_trace_t * t = va_arg (*args, ip6_forward_next_trace_t *);
+ vnet_main_t * vnm = vnet_get_main();
+ ip6_main_t * im = &ip6_main;
+ uword indent = format_get_indent (s);
+
+ s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
+ t->fib_index, t->adj_index, format_ip_adjacency,
+ vnm, &im->lookup_main, t->adj_index, t->flow_hash);
+ s = format (s, "\n%U%U",
+ format_white_space, indent,
+ format_ip_adjacency_packet_data,
+ vnm, &im->lookup_main, t->adj_index,
+ t->packet_data, sizeof (t->packet_data));
return s;
}
n_left = frame->n_vectors;
from = vlib_frame_vector_args (frame);
-
+
while (n_left >= 4)
{
u32 bi0, bi1;
t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
- t0->fib_index = vec_elt (im->fib_index_by_sw_if_index,
- vnet_buffer(b0)->sw_if_index[VLIB_RX]);
+ t0->fib_index = (vnet_buffer(b0)->sw_if_index[VLIB_TX] != (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));
t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
- t1->fib_index = vec_elt (im->fib_index_by_sw_if_index,
- vnet_buffer(b1)->sw_if_index[VLIB_RX]);
+ t1->fib_index = (vnet_buffer(b1)->sw_if_index[VLIB_TX] != (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));
t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
- t0->fib_index = vec_elt (im->fib_index_by_sw_if_index,
- vnet_buffer(b0)->sw_if_index[VLIB_RX]);
+ t0->fib_index = (vnet_buffer(b0)->sw_if_index[VLIB_TX] != (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));
},
};
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_drop_node, ip6_drop)
+
VLIB_REGISTER_NODE (ip6_punt_node,static) = {
.function = ip6_punt,
.name = "ip6-punt",
},
};
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_punt_node, ip6_punt)
+
VLIB_REGISTER_NODE (ip6_miss_node,static) = {
.function = ip6_miss,
.name = "ip6-miss",
},
};
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_miss_node, ip6_miss)
+
VLIB_REGISTER_NODE (ip6_multicast_node,static) = {
.function = ip6_drop,
.name = "ip6-multicast",
n_bytes_left = n_this_buffer = payload_length_host_byte_order;
#if DPDK > 0
- if (p0)
+ if (p0 && n_this_buffer + headers_size > p0->current_length)
{
struct rte_mbuf *mb = rte_mbuf_from_vlib_buffer(p0);
u8 nb_segs = mb->nb_segs;
},
};
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local)
+
void ip6_register_protocol (u32 protocol, u32 node_index)
{
vlib_main_t * vm = vlib_get_main();
.name = "ip6-rewrite",
.vector_size = sizeof (u32),
- .format_trace = format_ip6_forward_next_trace,
+ .format_trace = format_ip6_rewrite_trace,
.n_next_nodes = 1,
.next_nodes = {
},
};
-VLIB_REGISTER_NODE (ip6_rewrite_local_node,static) = {
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite_transit)
+
+VLIB_REGISTER_NODE (ip6_rewrite_local_node) = {
.function = ip6_rewrite_local,
.name = "ip6-rewrite-local",
.vector_size = sizeof (u32),
.sibling_of = "ip6-rewrite",
- .format_trace = format_ip6_forward_next_trace,
+ .format_trace = format_ip6_rewrite_trace,
- .n_next_nodes = 1,
- .next_nodes = {
- [IP6_REWRITE_NEXT_DROP] = "error-drop",
- },
+ .n_next_nodes = 0,
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_local_node, ip6_rewrite_local)
+
+/*
+ * Hop-by-Hop handling
+ */
+
+ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
+
+#define foreach_ip6_hop_by_hop_error \
+_(PROCESSED, "pkts with ip6 hop-by-hop options") \
+_(FORMAT, "incorrectly formatted hop-by-hop options") \
+_(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
+
+typedef enum {
+#define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
+ foreach_ip6_hop_by_hop_error
+#undef _
+ IP6_HOP_BY_HOP_N_ERROR,
+} ip6_hop_by_hop_error_t;
+
+/*
+ * Primary h-b-h handler trace support
+ * We work pretty hard on the problem for obvious reasons
+ */
+typedef struct {
+ u32 next_index;
+ u32 trace_len;
+ u8 option_data[256];
+} ip6_hop_by_hop_trace_t;
+
+vlib_node_registration_t ip6_hop_by_hop_node;
+
+static char * ip6_hop_by_hop_error_strings[] = {
+#define _(sym,string) string,
+ foreach_ip6_hop_by_hop_error
+#undef _
+};
+
+static u8 *
+format_ip6_hop_by_hop_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 *);
+ ip6_hop_by_hop_trace_t * t = va_arg (*args, ip6_hop_by_hop_trace_t *);
+ ip6_hop_by_hop_header_t *hbh0;
+ ip6_hop_by_hop_option_t *opt0, *limit0;
+ ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
+
+ u8 type0;
+
+ hbh0 = (ip6_hop_by_hop_header_t *)t->option_data;
+
+ s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
+ t->next_index, (hbh0->length+1)<<3, t->trace_len);
+
+ opt0 = (ip6_hop_by_hop_option_t *) (hbh0+1);
+ limit0 = (ip6_hop_by_hop_option_t *) ((u8 *)hbh0) + t->trace_len;
+
+ while (opt0 < limit0) {
+ type0 = opt0->type;
+ switch (type0) {
+ case 0: /* Pad, just stop */
+ opt0 = (ip6_hop_by_hop_option_t *) ((u8 *)opt0) + 1;
+ break;
+
+ default:
+ if (hm->trace[type0]) {
+ s = (*hm->trace[type0])(s, opt0);
+ } else {
+ s = format (s, "\n unrecognized option %d length %d", type0, opt0->length);
+ }
+ opt0 = (ip6_hop_by_hop_option_t *) (((u8 *)opt0) + opt0->length + sizeof (ip6_hop_by_hop_option_t));
+ break;
+ }
+ }
+ return s;
+}
+
+/*
+ * Process the Hop-by-Hop Options header
+ */
+static uword
+ip6_hop_by_hop (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ vlib_node_runtime_t *error_node = vlib_node_get_runtime(vm, ip6_hop_by_hop_node.index);
+ ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
+ u32 n_left_from, *from, *to_next;
+ ip_lookup_next_t next_index;
+ ip6_main_t * im = &ip6_main;
+ ip_lookup_main_t *lm = &im->lookup_main;
+
+ 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 > 0 && n_left_to_next > 0) {
+ u32 bi0;
+ vlib_buffer_t * b0;
+ u32 next0;
+ ip6_header_t * ip0;
+ ip6_hop_by_hop_header_t *hbh0;
+ ip6_hop_by_hop_option_t *opt0, *limit0;
+ u8 type0;
+ u8 error0 = 0;
+
+ /* 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);
+ u32 adj_index0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
+ ip_adjacency_t *adj0 = ip_get_adjacency(lm, adj_index0);
+ /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
+ next0 = adj0->lookup_next_index;
+
+ ip0 = vlib_buffer_get_current (b0);
+ hbh0 = (ip6_hop_by_hop_header_t *)(ip0+1);
+ opt0 = (ip6_hop_by_hop_option_t *)(hbh0+1);
+ limit0 = (ip6_hop_by_hop_option_t *)((u8 *)hbh0 + ((hbh0->length + 1) << 3));
+
+ /*
+ * Basic validity checks
+ */
+ if ((hbh0->length + 1) << 3 > clib_net_to_host_u16(ip0->payload_length)) {
+ error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
+ next0 = IP_LOOKUP_NEXT_DROP;
+ goto out0;
+ }
+
+ /* Scan the set of h-b-h options, process ones that we understand */
+ while (opt0 < limit0) {
+ type0 = opt0->type;
+ switch (type0) {
+ case 0: /* Pad1 */
+ opt0 = (ip6_hop_by_hop_option_t *) ((u8 *)opt0) + 1;
+ continue;
+ case 1: /* PadN */
+ break;
+ default:
+ if (hm->options[type0]) {
+ if ((*hm->options[type0])(b0, ip0, opt0) < 0) {
+ error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
+ goto out0;
+ }
+ } else {
+ /* Unrecognized mandatory option, check the two high order bits */
+ switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS) {
+ case HBH_OPTION_TYPE_SKIP_UNKNOWN:
+ break;
+ case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
+ next0 = IP_LOOKUP_NEXT_DROP;
+ break;
+ case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
+ next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
+ icmp6_error_set_vnet_buffer(b0, ICMP6_parameter_problem,
+ ICMP6_parameter_problem_unrecognized_option, (u8 *)opt0 - (u8 *)ip0);
+ break;
+ case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
+ if (!ip6_address_is_multicast(&ip0->dst_address)) {
+ next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
+ icmp6_error_set_vnet_buffer(b0, ICMP6_parameter_problem,
+ ICMP6_parameter_problem_unrecognized_option, (u8 *)opt0 - (u8 *)ip0);
+ } else {
+ next0 = IP_LOOKUP_NEXT_DROP;
+ }
+ break;
+ }
+ error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
+ goto out0;
+ }
+ }
+ opt0 = (ip6_hop_by_hop_option_t *) (((u8 *)opt0) + opt0->length + sizeof (ip6_hop_by_hop_option_t));
+ }
+
+ out0:
+ /* Has the classifier flagged this buffer for special treatment? */
+ if ((error0 == 0) && (vnet_buffer(b0)->l2_classify.opaque_index == OI_DECAP))
+ next0 = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
+
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) {
+ ip6_hop_by_hop_trace_t *t = vlib_add_trace(vm, node, b0, sizeof (*t));
+ u32 trace_len = (hbh0->length + 1) << 3;
+ t->next_index = next0;
+ /* Capture the h-b-h option verbatim */
+ trace_len = trace_len < ARRAY_LEN(t->option_data) ? trace_len : ARRAY_LEN(t->option_data);
+ t->trace_len = trace_len;
+ clib_memcpy(t->option_data, hbh0, trace_len);
+ }
+
+ b0->error = error_node->errors[error0];
+
+ /* 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);
+ }
+ return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (ip6_hop_by_hop_node) = {
+ .function = ip6_hop_by_hop,
+ .name = "ip6-hop-by-hop",
+ .sibling_of = "ip6-lookup",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip6_hop_by_hop_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(ip6_hop_by_hop_error_strings),
+ .error_strings = ip6_hop_by_hop_error_strings,
+ .n_next_nodes = 0,
};
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop)
+
+static clib_error_t *
+ip6_hop_by_hop_init (vlib_main_t * vm)
+{
+ ip6_hop_by_hop_main_t * hm = &ip6_hop_by_hop_main;
+ memset(hm->options, 0, sizeof(hm->options));
+ memset(hm->trace, 0, sizeof(hm->trace));
+
+ return (0);
+}
+
+VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
+
+int
+ip6_hbh_register_option (u8 option,
+ int options(vlib_buffer_t *b, ip6_header_t *ip, ip6_hop_by_hop_option_t *opt),
+ u8 *trace(u8 *s, ip6_hop_by_hop_option_t *opt))
+{
+ ip6_main_t * im = &ip6_main;
+ ip6_hop_by_hop_main_t * hm = &ip6_hop_by_hop_main;
+
+ ASSERT (option < ARRAY_LEN (hm->options));
+
+ /* Already registered */
+ if (hm->options[option])
+ return (-1);
+
+ hm->options[option] = options;
+ hm->trace[option] = trace;
+
+ /* Set global variable */
+ im->hbh_enabled = 1;
+
+ return (0);
+}
+
+int
+ip6_hbh_unregister_option (u8 option)
+{
+ ip6_main_t * im = &ip6_main;
+ ip6_hop_by_hop_main_t * hm = &ip6_hop_by_hop_main;
+
+ ASSERT (option < ARRAY_LEN (hm->options));
+
+ /* Not registered */
+ if (!hm->options[option])
+ return (-1);
+
+ hm->options[option] = NULL;
+ hm->trace[option] = NULL;
+
+ /* Disable global knob if this was the last option configured */
+ int i;
+ bool found = false;
+ for (i = 0; i < 256; i++) {
+ if (hm->options[option]) {
+ found = true;
+ break;
+ }
+ }
+ if (!found)
+ im->hbh_enabled = 0;
+
+ return (0);
+}
+
/* Global IP6 main. */
ip6_main_t ip6_main;
pn->unformat_edit = unformat_pg_ip6_header;
}
+ /* Unless explicitly configured, don't process HBH options */
+ im->hbh_enabled = 0;
+
{
icmp6_neighbor_solicitation_header_t p;
"ip6 neighbor discovery");
}
+ ip6_feature_init (vm, im);
+
return 0;
}
Code Review / vpp.git / blobdiff