diff options
author | Ole Troan <ot@cisco.com> | 2016-01-13 22:30:43 +0100 |
---|---|---|
committer | Ole Trøan <ot@cisco.com> | 2016-01-14 10:01:03 +0000 |
commit | 9fb87553bec802552f09818c8fa2eab82c5eae92 (patch) | |
tree | 759b3af7968e02c764a0e5db775564e65c9c0fb5 /vnet/vnet/ip/ip_frag.c | |
parent | 92eade1be5b4eefc71481bb4c7044d3ded243b5e (diff) |
Dual loop decrement TTL.
Outer fragmentation.
ICMP PMTUD.
Add DF ignore knob.
Change-Id: Icfd7b5c5d9629db3b8130ba15dc6c9a5e709d23b
Signed-off-by: Ole Troan <ot@cisco.com>
Diffstat (limited to 'vnet/vnet/ip/ip_frag.c')
-rw-r--r-- | vnet/vnet/ip/ip_frag.c | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/vnet/vnet/ip/ip_frag.c b/vnet/vnet/ip/ip_frag.c index 22176187a9c..3436090a426 100644 --- a/vnet/vnet/ip/ip_frag.c +++ b/vnet/vnet/ip/ip_frag.c @@ -37,9 +37,8 @@ static u8 * 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 offset: %u mtu: %u fragments: %u next: %s", - t->ipv6?"6":"4", - t->header_offset, t->mtu, t->n_fragments, node->next_node_names[t->next]); + s = format(s, "IPv%s offset: %u mtu: %u fragments: %u", + t->ipv6?"6":"4", t->header_offset, t->mtu, t->n_fragments); return s; } @@ -146,6 +145,14 @@ ip4_frag_do_fragment(vlib_main_t *vm, u32 pi, u32 **buffer, ip_frag_error_t *err } } +void +ip_frag_set_vnet_buffer (vlib_buffer_t *b, u16 offset, u16 mtu, u8 next_index, u8 flags) +{ + vnet_buffer(b)->ip_frag.header_offset = offset; + vnet_buffer(b)->ip_frag.mtu = mtu; + vnet_buffer(b)->ip_frag.next_index = next_index; + vnet_buffer(b)->ip_frag.flags = flags; +} static uword ip4_frag (vlib_main_t *vm, @@ -189,13 +196,25 @@ ip4_frag (vlib_main_t *vm, tr->next = vnet_buffer(p0)->ip_frag.next_index; } - next0 = (error0 == IP_FRAG_ERROR_NONE) ? vnet_buffer(p0)->ip_frag.next_index : IP4_FRAG_NEXT_DROP; - frag_sent += vec_len(buffer); - small_packets += (vec_len(buffer) == 1); + if (error0 == IP_FRAG_ERROR_DONT_FRAGMENT_SET) { + icmp4_error_set_vnet_buffer(p0, ICMP4_destination_unreachable, + ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set, + vnet_buffer(p0)->ip_frag.mtu); + vlib_buffer_advance(p0, vnet_buffer(p0)->ip_frag.header_offset); + next0 = IP4_FRAG_NEXT_ICMP_ERROR; + } else + next0 = (error0 == IP_FRAG_ERROR_NONE) ? vnet_buffer(p0)->ip_frag.next_index : IP4_FRAG_NEXT_DROP; + + if (error0 == IP_FRAG_ERROR_NONE) { + frag_sent += vec_len(buffer); + small_packets += (vec_len(buffer) == 1); + } else + vlib_error_count(vm, ip4_frag_node.index, error0, 1); //Send fragments that were added in the frame frag_from = buffer; frag_left = vec_len(buffer); + while (frag_left > 0) { while (frag_left > 0 && n_left_to_next > 0) { u32 i; @@ -218,6 +237,7 @@ ip4_frag (vlib_main_t *vm, vlib_put_next_frame(vm, node, next_index, n_left_to_next); } vec_free(buffer); + vlib_node_increment_counter(vm, ip4_frag_node.index, IP_FRAG_ERROR_FRAGMENT_SENT, frag_sent); vlib_node_increment_counter(vm, ip4_frag_node.index, IP_FRAG_ERROR_SMALL_PACKET, small_packets); @@ -426,6 +446,7 @@ VLIB_REGISTER_NODE (ip4_frag_node) = { .next_nodes = { [IP4_FRAG_NEXT_IP4_LOOKUP] = "ip4-lookup", [IP4_FRAG_NEXT_IP6_LOOKUP] = "ip6-lookup", + [IP4_FRAG_NEXT_ICMP_ERROR] = "ip4-icmp-error", [IP4_FRAG_NEXT_DROP] = "error-drop" }, }; |