diff options
Diffstat (limited to 'src/vnet/lawful-intercept/node.c')
| -rw-r--r-- | src/vnet/lawful-intercept/node.c | 274 |
1 files changed, 141 insertions, 133 deletions
diff --git a/src/vnet/lawful-intercept/node.c b/src/vnet/lawful-intercept/node.c index 50c76ec5a7f..716af43e063 100644 --- a/src/vnet/lawful-intercept/node.c +++ b/src/vnet/lawful-intercept/node.c @@ -24,17 +24,19 @@ vlib_node_registration_t li_hit_node; -typedef struct { +typedef struct +{ u32 next_index; } li_hit_trace_t; /* packet trace format function */ -static u8 * format_li_hit_trace (u8 * s, va_list * args) +static u8 * +format_li_hit_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 *); - li_hit_trace_t * t = va_arg (*args, li_hit_trace_t *); - + li_hit_trace_t *t = va_arg (*args, li_hit_trace_t *); + s = format (s, "LI_HIT: next index %d", t->next_index); return s; @@ -47,44 +49,44 @@ _(HITS, "LI packets processed") \ _(NO_COLLECTOR, "No collector configured") \ _(BUFFER_ALLOCATION_FAILURE, "Buffer allocation failure") -typedef enum { +typedef enum +{ #define _(sym,str) LI_HIT_ERROR_##sym, foreach_li_hit_error #undef _ - LI_HIT_N_ERROR, + LI_HIT_N_ERROR, } li_hit_error_t; -static char * li_hit_error_strings[] = { +static char *li_hit_error_strings[] = { #define _(sym,string) string, foreach_li_hit_error #undef _ }; -typedef enum { +typedef enum +{ LI_HIT_NEXT_ETHERNET, LI_HIT_N_NEXT, } li_hit_next_t; static uword li_hit_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) + vlib_node_runtime_t * node, vlib_frame_t * frame) { - u32 n_left_from, * from, * to_next; + u32 n_left_from, *from, *to_next; li_hit_next_t next_index; - vlib_frame_t * int_frame = 0; - u32 * to_int_next = 0; - li_main_t * lm = &li_main; - + vlib_frame_t *int_frame = 0; + u32 *to_int_next = 0; + li_main_t *lm = &li_main; + from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; if (PREDICT_FALSE (vec_len (lm->collectors) == 0)) { - vlib_node_increment_counter (vm, li_hit_node.index, - LI_HIT_ERROR_NO_COLLECTOR, - n_left_from); + vlib_node_increment_counter (vm, li_hit_node.index, + LI_HIT_ERROR_NO_COLLECTOR, n_left_from); } else { @@ -92,32 +94,31 @@ li_hit_node_fn (vlib_main_t * vm, int_frame = vlib_get_frame_to_node (vm, ip4_lookup_node.index); to_int_next = vlib_frame_vector_args (int_frame); } - + while (n_left_from > 0) { u32 n_left_to_next; - vlib_get_next_frame (vm, node, next_index, - to_next, n_left_to_next); + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); #if 0 while (n_left_from >= 4 && n_left_to_next >= 2) { - u32 next0 = LI_HIT_NEXT_INTERFACE_OUTPUT; - u32 next1 = LI_HIT_NEXT_INTERFACE_OUTPUT; - u32 sw_if_index0, sw_if_index1; - u8 tmp0[6], tmp1[6]; - ethernet_header_t *en0, *en1; - u32 bi0, bi1; - vlib_buffer_t * b0, * b1; - + u32 next0 = LI_HIT_NEXT_INTERFACE_OUTPUT; + u32 next1 = LI_HIT_NEXT_INTERFACE_OUTPUT; + u32 sw_if_index0, sw_if_index1; + u8 tmp0[6], tmp1[6]; + ethernet_header_t *en0, *en1; + u32 bi0, bi1; + vlib_buffer_t *b0, *b1; + /* Prefetch next iteration. */ { - vlib_buffer_t * p2, * p3; - + vlib_buffer_t *p2, *p3; + p2 = vlib_get_buffer (vm, from[2]); p3 = vlib_get_buffer (vm, from[3]); - + vlib_prefetch_buffer_header (p2, LOAD); vlib_prefetch_buffer_header (p3, LOAD); @@ -125,7 +126,7 @@ li_hit_node_fn (vlib_main_t * vm, CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); } - /* speculatively enqueue b0 and b1 to the current next frame */ + /* speculatively enqueue b0 and b1 to the current next frame */ to_next[0] = bi0 = from[0]; to_next[1] = bi1 = from[1]; from += 2; @@ -136,58 +137,58 @@ li_hit_node_fn (vlib_main_t * vm, b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); - /* $$$$$ Dual loop: process 2 x packets here $$$$$ */ - ASSERT (b0->current_data == 0); - ASSERT (b1->current_data == 0); - - en0 = vlib_buffer_get_current (b0); - en1 = vlib_buffer_get_current (b1); - - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; - sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX]; - - /* Send pkt back out the RX interface */ - vnet_buffer(b0)->sw_if_index[VLIB_TX] = sw_if_index0; - vnet_buffer(b1)->sw_if_index[VLIB_TX] = sw_if_index1; - - /* $$$$$ End of processing 2 x packets $$$$$ */ - - if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE))) - { - if (b0->flags & VLIB_BUFFER_IS_TRACED) - { - li_hit_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - } - if (b1->flags & VLIB_BUFFER_IS_TRACED) - { - li_hit_trace_t *t = - vlib_add_trace (vm, node, b1, sizeof (*t)); - t->sw_if_index = sw_if_index1; - t->next_index = next1; - } - } - - /* verify speculative enqueues, maybe switch current next frame */ - vlib_validate_buffer_enqueue_x2 (vm, node, next_index, - to_next, n_left_to_next, - bi0, bi1, next0, next1); - } + /* $$$$$ Dual loop: process 2 x packets here $$$$$ */ + ASSERT (b0->current_data == 0); + ASSERT (b1->current_data == 0); + + en0 = vlib_buffer_get_current (b0); + en1 = vlib_buffer_get_current (b1); + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; + + /* Send pkt back out the RX interface */ + vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index0; + vnet_buffer (b1)->sw_if_index[VLIB_TX] = sw_if_index1; + + /* $$$$$ End of processing 2 x packets $$$$$ */ + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) + { + if (b0->flags & VLIB_BUFFER_IS_TRACED) + { + li_hit_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + } + if (b1->flags & VLIB_BUFFER_IS_TRACED) + { + li_hit_trace_t *t = + vlib_add_trace (vm, node, b1, sizeof (*t)); + t->sw_if_index = sw_if_index1; + t->next_index = next1; + } + } + + /* verify speculative enqueues, maybe switch current next frame */ + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, next1); + } #endif /* $$$ dual-loop off */ while (n_left_from > 0 && n_left_to_next > 0) { - u32 bi0; - vlib_buffer_t * b0; - vlib_buffer_t * c0; - ip4_udp_header_t * iu0; - ip4_header_t * ip0; - udp_header_t * udp0; - u32 next0 = LI_HIT_NEXT_ETHERNET; - - /* speculatively enqueue b0 to the current next frame */ + u32 bi0; + vlib_buffer_t *b0; + vlib_buffer_t *c0; + ip4_udp_header_t *iu0; + ip4_header_t *ip0; + udp_header_t *udp0; + u32 next0 = LI_HIT_NEXT_ETHERNET; + + /* speculatively enqueue b0 to the current next frame */ bi0 = from[0]; to_next[0] = bi0; from += 1; @@ -196,54 +197,53 @@ li_hit_node_fn (vlib_main_t * vm, n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); - if (PREDICT_TRUE(to_int_next != 0)) - { - /* Make an intercept copy. This can fail. */ - c0 = vlib_buffer_copy (vm, b0); - - if (PREDICT_FALSE (c0 == 0)) - { - vlib_node_increment_counter - (vm, node->node_index, - LI_HIT_ERROR_BUFFER_ALLOCATION_FAILURE, 1); - goto skip; - } - - vlib_buffer_advance(c0, -sizeof(*iu0)); - - iu0 = vlib_buffer_get_current(c0); - ip0 = &iu0->ip4; - - ip0->ip_version_and_header_length = 0x45; - ip0->ttl = 254; - ip0->protocol = IP_PROTOCOL_UDP; - - ip0->src_address.as_u32 = lm->src_addrs[0].as_u32; - ip0->dst_address.as_u32 = lm->collectors[0].as_u32; - ip0->length = vlib_buffer_length_in_chain (vm, c0); - ip0->checksum = ip4_header_checksum (ip0); - - udp0 = &iu0->udp; - udp0->src_port = udp0->dst_port = - clib_host_to_net_u16(lm->ports[0]); - udp0->checksum = 0; - udp0->length = - clib_net_to_host_u16 (vlib_buffer_length_in_chain (vm , b0)); - - to_int_next [0] = vlib_get_buffer_index (vm, c0); - to_int_next++; - } - - skip: - if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - li_hit_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->next_index = next0; - } - - /* verify speculative enqueue, maybe switch current next frame */ + if (PREDICT_TRUE (to_int_next != 0)) + { + /* Make an intercept copy. This can fail. */ + c0 = vlib_buffer_copy (vm, b0); + + if (PREDICT_FALSE (c0 == 0)) + { + vlib_node_increment_counter + (vm, node->node_index, + LI_HIT_ERROR_BUFFER_ALLOCATION_FAILURE, 1); + goto skip; + } + + vlib_buffer_advance (c0, -sizeof (*iu0)); + + iu0 = vlib_buffer_get_current (c0); + ip0 = &iu0->ip4; + + ip0->ip_version_and_header_length = 0x45; + ip0->ttl = 254; + ip0->protocol = IP_PROTOCOL_UDP; + + ip0->src_address.as_u32 = lm->src_addrs[0].as_u32; + ip0->dst_address.as_u32 = lm->collectors[0].as_u32; + ip0->length = vlib_buffer_length_in_chain (vm, c0); + ip0->checksum = ip4_header_checksum (ip0); + + udp0 = &iu0->udp; + udp0->src_port = udp0->dst_port = + clib_host_to_net_u16 (lm->ports[0]); + udp0->checksum = 0; + udp0->length = + clib_net_to_host_u16 (vlib_buffer_length_in_chain (vm, b0)); + + to_int_next[0] = vlib_get_buffer_index (vm, c0); + to_int_next++; + } + + skip: + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + li_hit_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); + t->next_index = next0; + } + + /* 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); @@ -258,18 +258,19 @@ li_hit_node_fn (vlib_main_t * vm, vlib_put_frame_to_node (vm, ip4_lookup_node.index, int_frame); } - vlib_node_increment_counter (vm, li_hit_node.index, - LI_HIT_ERROR_HITS, frame->n_vectors); + vlib_node_increment_counter (vm, li_hit_node.index, + LI_HIT_ERROR_HITS, frame->n_vectors); return frame->n_vectors; } +/* *INDENT-OFF* */ VLIB_REGISTER_NODE (li_hit_node) = { .function = li_hit_node_fn, .name = "li-hit", .vector_size = sizeof (u32), .format_trace = format_li_hit_trace, .type = VLIB_NODE_TYPE_INTERNAL, - + .n_errors = ARRAY_LEN(li_hit_error_strings), .error_strings = li_hit_error_strings, @@ -280,6 +281,13 @@ VLIB_REGISTER_NODE (li_hit_node) = { [LI_HIT_NEXT_ETHERNET] = "ethernet-input-not-l2", }, }; +/* *INDENT-ON* */ VLIB_NODE_FUNCTION_MULTIARCH (li_hit_node, li_hit_node_fn) - +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |