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Strip trailing bytes from network packets #145

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Jun 4, 2015
Merged

Strip trailing bytes from network packets #145

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2 changes: 2 additions & 0 deletions lib/ipv4.ml
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Original file line number Diff line number Diff line change
Expand Up @@ -187,6 +187,8 @@ module Make(Ethif : V1_LWT.ETHIF) (Clock : V1.CLOCK) (Time : V1_LWT.TIME) = stru
let payload_len = Wire_structs.Ipv4_wire.get_ipv4_len buf - ihl in
let hdr, data = Cstruct.split buf ihl in
if Cstruct.len data >= payload_len then begin
(* Strip trailing bytes. See: https://github.com/mirage/mirage-net-xen/issues/24 *)
let data = Cstruct.sub data 0 payload_len in
let proto = Wire_structs.Ipv4_wire.get_ipv4_proto buf in
match Wire_structs.Ipv4_wire.int_to_protocol proto with
| Some `ICMP -> icmp_input t src hdr data
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