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ip: set the snapshot length for the payload correctly.

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Cut off the snapshot length to the end of the IP payload or the end of
the data in which it's contained, whichever comes first.
This commit is contained in:
Guy Harris 2024-10-30 22:26:34 -07:00
parent d9355ee3f1
commit a4221536d5
1 changed files with 4 additions and 2 deletions
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6
print-ip.c
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@ -358,9 +358,11 @@ ip_print(netdissect_options *ndo,
ND_TCHECK_SIZE(ip);
/*
* Cut off the snapshot length to the end of the IP payload.
* Cut off the snapshot length to the end of the IP payload
* or the end of the data in which it's contained, whichever
* comes first.
*/
if (!nd_push_snaplen(ndo, bp, len)) {
if (!nd_push_snaplen(ndo, bp, ND_MIN(length, len))) {
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: can't push snaplen on buffer stack", __func__);
}