diff options
Diffstat (limited to 'src/vnet/ip/ip_frag.c')
| -rw-r--r-- | src/vnet/ip/ip_frag.c | 82 |
1 files changed, 33 insertions, 49 deletions
diff --git a/src/vnet/ip/ip_frag.c b/src/vnet/ip/ip_frag.c index cafa9a66d6b..934e40a5d18 100644 --- a/src/vnet/ip/ip_frag.c +++ b/src/vnet/ip/ip_frag.c @@ -25,10 +25,10 @@ typedef struct { - u8 ipv6; u16 mtu; u8 next; u16 n_fragments; + u16 pkt_size; } ip_frag_trace_t; static u8 * @@ -37,8 +37,8 @@ format_ip_frag_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 *); ip_frag_trace_t *t = va_arg (*args, ip_frag_trace_t *); - s = format (s, "IPv%s mtu: %u fragments: %u next: %d", - t->ipv6 ? "6" : "4", t->mtu, t->n_fragments, t->next); + s = format (s, "mtu: %u pkt-size: %u fragments: %u next: %d", t->mtu, + t->pkt_size, t->n_fragments, t->next); return s; } @@ -95,7 +95,7 @@ ip4_frag_do_fragment (vlib_main_t * vm, u32 from_bi, u16 mtu, { vlib_buffer_t *from_b; ip4_header_t *ip4; - u16 len, max, rem, ip_frag_id, ip_frag_offset; + u16 len, max, rem, ip_frag_id, ip_frag_offset, head_bytes; u8 *org_from_packet, more; from_b = vlib_get_buffer (vm, from_bi); @@ -103,9 +103,9 @@ ip4_frag_do_fragment (vlib_main_t * vm, u32 from_bi, u16 mtu, ip4 = vlib_buffer_get_current (from_b) + l2unfragmentablesize; rem = clib_net_to_host_u16 (ip4->length) - sizeof (ip4_header_t); - max = - (clib_min (mtu, vlib_buffer_get_default_data_size (vm)) - - sizeof (ip4_header_t)) & ~0x7; + head_bytes = sizeof (ip4_header_t) + l2unfragmentablesize; + max = (clib_min (mtu, vlib_buffer_get_default_data_size (vm)) - head_bytes) & + ~0x7; if (rem > (vlib_buffer_length_in_chain (vm, from_b) - sizeof (ip4_header_t))) @@ -142,8 +142,7 @@ ip4_frag_do_fragment (vlib_main_t * vm, u32 from_bi, u16 mtu, u8 *from_data = (void *) (ip4 + 1); vlib_buffer_t *org_from_b = from_b; u16 fo = 0; - u16 left_in_from_buffer = - from_b->current_length - (l2unfragmentablesize + sizeof (ip4_header_t)); + u16 left_in_from_buffer = from_b->current_length - head_bytes; u16 ptr = 0; /* Do the actual fragmentation */ @@ -166,8 +165,7 @@ ip4_frag_do_fragment (vlib_main_t * vm, u32 from_bi, u16 mtu, /* Copy ip4 header */ to_data = vlib_buffer_get_current (to_b); - clib_memcpy_fast (to_data, org_from_packet, - l2unfragmentablesize + sizeof (ip4_header_t)); + clib_memcpy_fast (to_data, org_from_packet, head_bytes); to_ip4 = (ip4_header_t *) (to_data + l2unfragmentablesize); to_data = (void *) (to_ip4 + 1); vnet_buffer (to_b)->l3_hdr_offset = to_b->current_data; @@ -213,8 +211,7 @@ ip4_frag_do_fragment (vlib_main_t * vm, u32 from_bi, u16 mtu, } to_b->flags |= VNET_BUFFER_F_IS_IP4; - to_b->current_length = - len + sizeof (ip4_header_t) + l2unfragmentablesize; + to_b->current_length = len + head_bytes; to_ip4->fragment_id = ip_frag_id; to_ip4->flags_and_fragment_offset = @@ -286,7 +283,7 @@ frag_node_inline (vlib_main_t * vm, vlib_node_runtime_t * node, ip_frag_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr)); tr->mtu = mtu; - tr->ipv6 = is_ip6 ? 1 : 0; + tr->pkt_size = vlib_buffer_length_in_chain (vm, p0); tr->n_fragments = vec_len (buffer); tr->next = vnet_buffer (p0)->ip_frag.next_index; } @@ -385,13 +382,17 @@ ip6_frag_do_fragment (vlib_main_t * vm, u32 from_bi, u16 mtu, ip6_header_t *ip6; u16 len, max, rem, ip_frag_id; u8 *org_from_packet; + u16 head_bytes; from_b = vlib_get_buffer (vm, from_bi); org_from_packet = vlib_buffer_get_current (from_b); ip6 = vlib_buffer_get_current (from_b) + l2unfragmentablesize; + head_bytes = + (sizeof (ip6_header_t) + sizeof (ip6_frag_hdr_t) + l2unfragmentablesize); rem = clib_net_to_host_u16 (ip6->payload_length); - max = (mtu - sizeof (ip6_header_t) - sizeof (ip6_frag_hdr_t)) & ~0x7; // TODO: Is max correct?? + max = (clib_min (mtu, vlib_buffer_get_default_data_size (vm)) - head_bytes) & + ~0x7; if (rem > (vlib_buffer_length_in_chain (vm, from_b) - sizeof (ip6_header_t))) @@ -423,9 +424,7 @@ ip6_frag_do_fragment (vlib_main_t * vm, u32 from_bi, u16 mtu, ip6_frag_hdr_t *to_frag_hdr; u8 *to_data; - len = - (rem > - (mtu - sizeof (ip6_header_t) - sizeof (ip6_frag_hdr_t)) ? max : rem); + len = (rem > max ? max : rem); if (len != rem) /* Last fragment does not need to divisible by 8 */ len &= ~0x7; if ((to_b = frag_buffer_alloc (org_from_b, &to_bi)) == 0) @@ -438,7 +437,7 @@ ip6_frag_do_fragment (vlib_main_t * vm, u32 from_bi, u16 mtu, /* Copy ip6 header */ clib_memcpy_fast (to_b->data, org_from_packet, l2unfragmentablesize + sizeof (ip6_header_t)); - to_ip6 = vlib_buffer_get_current (to_b); + to_ip6 = vlib_buffer_get_current (to_b) + l2unfragmentablesize; to_frag_hdr = (ip6_frag_hdr_t *) (to_ip6 + 1); to_data = (void *) (to_frag_hdr + 1); @@ -484,8 +483,7 @@ ip6_frag_do_fragment (vlib_main_t * vm, u32 from_bi, u16 mtu, to_ptr += bytes_to_copy; } - to_b->current_length = - len + sizeof (ip6_header_t) + sizeof (ip6_frag_hdr_t); + to_b->current_length = len + head_bytes; to_ip6->payload_length = clib_host_to_net_u16 (len + sizeof (ip6_frag_hdr_t)); to_ip6->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION; @@ -502,13 +500,6 @@ ip6_frag_do_fragment (vlib_main_t * vm, u32 from_bi, u16 mtu, return IP_FRAG_ERROR_NONE; } -static char *ip4_frag_error_strings[] = { -#define _(sym,string) string, - foreach_ip_frag_error -#undef _ -}; - -/* *INDENT-OFF* */ VLIB_REGISTER_NODE (ip4_frag_node) = { .function = ip4_frag, .name = IP4_FRAG_NODE_NAME, @@ -517,21 +508,17 @@ VLIB_REGISTER_NODE (ip4_frag_node) = { .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = IP_FRAG_N_ERROR, - .error_strings = ip4_frag_error_strings, + .error_counters = ip_frag_error_counters, .n_next_nodes = IP_FRAG_N_NEXT, - .next_nodes = { - [IP_FRAG_NEXT_IP_REWRITE] = "ip4-rewrite", - [IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN] = "ip4-midchain", - [IP_FRAG_NEXT_IP4_LOOKUP] = "ip4-lookup", - [IP_FRAG_NEXT_IP6_LOOKUP] = "ip6-lookup", - [IP_FRAG_NEXT_ICMP_ERROR] = "ip4-icmp-error", - [IP_FRAG_NEXT_DROP] = "ip4-drop" - }, + .next_nodes = { [IP_FRAG_NEXT_IP_REWRITE] = "ip4-rewrite", + [IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN] = "ip4-midchain", + [IP_FRAG_NEXT_IP4_LOOKUP] = "ip4-lookup", + [IP_FRAG_NEXT_IP6_LOOKUP] = "ip6-lookup", + [IP_FRAG_NEXT_ICMP_ERROR] = "ip4-icmp-error", + [IP_FRAG_NEXT_DROP] = "ip4-drop" }, }; -/* *INDENT-ON* */ -/* *INDENT-OFF* */ VLIB_REGISTER_NODE (ip6_frag_node) = { .function = ip6_frag, .name = IP6_FRAG_NODE_NAME, @@ -540,19 +527,16 @@ VLIB_REGISTER_NODE (ip6_frag_node) = { .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = IP_FRAG_N_ERROR, - .error_strings = ip4_frag_error_strings, + .error_counters = ip_frag_error_counters, .n_next_nodes = IP_FRAG_N_NEXT, - .next_nodes = { - [IP_FRAG_NEXT_IP_REWRITE] = "ip6-rewrite", - [IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN] = "ip6-midchain", - [IP_FRAG_NEXT_IP4_LOOKUP] = "ip4-lookup", - [IP_FRAG_NEXT_IP6_LOOKUP] = "ip6-lookup", - [IP_FRAG_NEXT_ICMP_ERROR] = "error-drop", - [IP_FRAG_NEXT_DROP] = "ip6-drop" - }, + .next_nodes = { [IP_FRAG_NEXT_IP_REWRITE] = "ip6-rewrite", + [IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN] = "ip6-midchain", + [IP_FRAG_NEXT_IP4_LOOKUP] = "ip4-lookup", + [IP_FRAG_NEXT_IP6_LOOKUP] = "ip6-lookup", + [IP_FRAG_NEXT_ICMP_ERROR] = "error-drop", + [IP_FRAG_NEXT_DROP] = "ip6-drop" }, }; -/* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON |