#ifndef included_vlib_buffer_node_h
#define included_vlib_buffer_node_h
+/** \file
+ vlib buffer/node functions
+*/
+
+/** \brief Finish enqueueing two buffers forward in the graph.
+ Standard dual loop boilerplate element. This is a MACRO,
+ with MULTIPLE SIDE EFFECTS. In the ideal case,
+ <code>next_index == next0 == next1</code>,
+ which means that the speculative enqueue at the top of the dual loop
+ has correctly dealt with both packets. In that case, the macro does
+ nothing at all.
+
+ @param vm vlib_main_t pointer, varies by thread
+ @param node current node vlib_node_runtime_t pointer
+ @param next_index speculated next index used for both packets
+ @param to_next speculated vector pointer used for both packets
+ @param n_left_to_next number of slots left in speculated vector
+ @param bi0 first buffer index
+ @param bi1 second buffer index
+ @param next0 actual next index to be used for the first packet
+ @param next1 actual next index to be used for the second packet
+
+ @return @c next_index -- speculative next index to be used for future packets
+ @return @c to_next -- speculative frame to be used for future packets
+ @return @c n_left_to_next -- number of slots left in speculative frame
+*/
+
#define vlib_validate_buffer_enqueue_x2(vm,node,next_index,to_next,n_left_to_next,bi0,bi1,next0,next1) \
do { \
int enqueue_code = (next0 != next_index) + 2*(next1 != next_index); \
} \
} while (0)
+/** \brief Finish enqueueing one buffer forward in the graph.
+ Standard single loop boilerplate element. This is a MACRO,
+ with MULTIPLE SIDE EFFECTS. In the ideal case,
+ <code>next_index == next0</code>,
+ which means that the speculative enqueue at the top of the single loop
+ has correctly dealt with the packet in hand. In that case, the macro does
+ nothing at all.
+
+ @param vm vlib_main_t pointer, varies by thread
+ @param node current node vlib_node_runtime_t pointer
+ @param next_index speculated next index used for both packets
+ @param to_next speculated vector pointer used for both packets
+ @param n_left_to_next number of slots left in speculated vector
+ @param bi0 first buffer index
+ @param next0 actual next index to be used for the first packet
+
+ @return @c next_index -- speculative next index to be used for future packets
+ @return @c to_next -- speculative frame to be used for future packets
+ @return @c n_left_to_next -- number of slots left in speculative frame
+*/
#define vlib_validate_buffer_enqueue_x1(vm,node,next_index,to_next,n_left_to_next,bi0,next0) \
do { \
if (PREDICT_FALSE (next0 != next_index)) \
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
+/** \file
+ vlib node functions
+*/
+
+
#ifndef included_vlib_node_funcs_h
#define included_vlib_node_funcs_h
#include <vppinfra/fifo.h>
+/** \brief Get vlib node by index.
+ @warning This function will ASSERT if @c i is out of range.
+ @param vm vlib_main_t pointer, varies by thread
+ @param i node index.
+ @return pointer to the requested vlib_node_t.
+*/
+
always_inline vlib_node_t *
vlib_get_node (vlib_main_t * vm, u32 i)
{ return vec_elt (vm->node_main.nodes, i); }
+/** \brief Get vlib node by graph arc (next) index.
+ @param vm vlib_main_t pointer, varies by thread
+ @param node_index index of original node
+ @param next_index graph arc index
+ @return pointer to the vlib_node_t at the end of the indicated arc
+*/
+
always_inline vlib_node_t *
vlib_get_next_node (vlib_main_t * vm, u32 node_index, u32 next_index)
{
return vlib_get_node (vm, n->next_nodes[next_index]);
}
+/** \brief Get node runtime by node index.
+ @param vm vlib_main_t pointer, varies by thread
+ @param node_index index of node
+ @return pointer to the indicated vlib_node_runtime_t
+*/
+
always_inline vlib_node_runtime_t *
vlib_node_get_runtime (vlib_main_t * vm, u32 node_index)
{
}
}
+/** \brief Get node runtime private data by node index.
+ @param vm vlib_main_t pointer, varies by thread
+ @param node_index index of the node
+ @return pointer to the indicated vlib_node_runtime_t private data
+*/
+
always_inline void *
vlib_node_get_runtime_data (vlib_main_t * vm, u32 node_index)
{
return r->runtime_data;
}
+/** \brief Set node runtime private data.
+ @param vm vlib_main_t pointer, varies by thread
+ @param node_index index of the node
+ @param runtime_data arbitrary runtime private data
+ @param n_runtime_data_bytes size of runtime private data
+*/
+
always_inline void
vlib_node_set_runtime_data (vlib_main_t * vm, u32 node_index,
void * runtime_data,
clib_memcpy (r->runtime_data, n->runtime_data, vec_len (n->runtime_data));
}
+/** \brief Set node dispatch state.
+ @param vm vlib_main_t pointer, varies by thread
+ @param node_index index of the node
+ @param new_state new state for node, see vlib_node_state_t
+*/
always_inline void
vlib_node_set_state (vlib_main_t * vm, u32 node_index, vlib_node_state_t new_state)
{
VLIB_FRAME_VECTOR_ALIGN);
}
+/** \brief Get pointer to frame vector data.
+ @param f vlib_frame_t pointer
+ @return pointer to first vector element in frame
+*/
always_inline void *
vlib_frame_vector_args (vlib_frame_t * f)
{
return (void *) f + vlib_frame_vector_byte_offset (f->scalar_size);
}
-/* Scalar data lies before aligned vector data. */
+/** \brief Get pointer to frame scalar data.
+
+ @warning This is almost certainly not the function you wish to call.
+ See @ref vlib_frame_vector_args instead.
+
+ @param f vlib_frame_t pointer
+
+ @return arbitrary node scalar data
+
+ @sa vlib_frame_vector_args
+*/
always_inline void *
vlib_frame_args (vlib_frame_t * f)
{ return vlib_frame_vector_args (f) - f->scalar_size; }
return nf;
}
+/** \brief Get pointer to frame by (@c node_index, @c next_index).
+
+ @warning This is not a function that you should call directly.
+ See @ref vlib_get_next_frame instead.
+
+ @param vm vlib_main_t pointer, varies by thread
+ @param node_index index of the node
+ @param next_index graph arc index
+
+ @return pointer to the requested vlib_next_frame_t
+
+ @sa vlib_get_next_frame
+*/
+
always_inline vlib_next_frame_t *
vlib_node_get_next_frame (vlib_main_t * vm,
u32 node_index,
(n_vectors_left) = VLIB_FRAME_SIZE - _n; \
} while (0)
+
+/** \brief Get pointer to next frame vector data by
+ (@c vlib_node_runtime_t, @c next_index).
+ Standard single/dual loop boilerplate element.
+ @attention This is a MACRO, with SIDE EFFECTS.
+
+ @param vm vlib_main_t pointer, varies by thread
+ @param node current node vlib_node_runtime_t pointer
+ @param next_index requested graph arc index
+
+ @return @c vectors -- pointer to next available vector slot
+ @return @c n_vectors_left -- number of vector slots available
+*/
#define vlib_get_next_frame(vm,node,next_index,vectors,n_vectors_left) \
vlib_get_next_frame_macro (vm, node, next_index, \
vectors, n_vectors_left, \
vectors, n_vectors_left, \
/* alloc new frame */ 1)
+/** \brief Release pointer to next frame vector data.
+ Standard single/dual loop boilerplate element.
+ @param vm vlib_main_t pointer, varies by thread
+ @param r current node vlib_node_runtime_t pointer
+ @param next_index graph arc index
+ @param n_packets_left number of slots still available in vector
+*/
void
vlib_put_next_frame (vlib_main_t * vm,
vlib_node_runtime_t * r,
#include <vnet/srp/srp.h> /* for srp_hw_interface_class */
#include <vnet/api_errno.h> /* for API error numbers */
+/** \file
+ vnet ip4 forwarding
+*/
+
/* This is really, really simple but stupid fib. */
u32
ip4_fib_lookup_with_table (ip4_main_t * im, u32 fib_index,
return frame->n_vectors;
}
+/** \brief IPv4 lookup node.
+ @node ip4-lookup
+
+ This is the main IPv4 lookup dispatch node.
+
+ @param vm vlib_main_t corresponding to the current thread
+ @param node vlib_node_runtime_t
+ @param frame vlib_frame_t whose contents should be dispatched
+
+ @par Graph mechanics: buffer metadata, next index usage
+
+ @em Uses:
+ - <code>vnet_buffer(b)->sw_if_index[VLIB_RX]</code>
+ - Indicates the @c sw_if_index value of the interface that the
+ packet was received on.
+ - <code>vnet_buffer(b)->sw_if_index[VLIB_TX]</code>
+ - When the value is @c ~0 then the node performs a longest prefix
+ match (LPM) for the packet destination address in the FIB attached
+ to the receive interface.
+ - Otherwise perform LPM for the packet destination address in the
+ indicated FIB. In this case <code>[VLIB_TX]</code> is a FIB index
+ value (0, 1, ...) and not a VRF id.
+
+ @em Sets:
+ - <code>vnet_buffer(b)->ip.adj_index[VLIB_TX]</code>
+ - The lookup result adjacency index.
+
+ <em>Next Index:</em>
+ - Dispatches the packet to the node index found in
+ ip_adjacency_t @c adj->lookup_next_index
+ (where @c adj is the lookup result adjacency).
+*/
static uword
ip4_lookup (vlib_main_t * vm,
vlib_node_runtime_t * node,
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