diff options
Diffstat (limited to 'src/vnet/ip')
| -rw-r--r-- | src/vnet/ip/ip_frag.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/src/vnet/ip/ip_frag.c b/src/vnet/ip/ip_frag.c index 9c223c3d0ae..95600116365 100644 --- a/src/vnet/ip/ip_frag.c +++ b/src/vnet/ip/ip_frag.c @@ -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 = |