diff options
Diffstat (limited to 'freebsd/contrib/tcpdump/print-sflow.c')
| -rw-r--r-- | freebsd/contrib/tcpdump/print-sflow.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/freebsd/contrib/tcpdump/print-sflow.c b/freebsd/contrib/tcpdump/print-sflow.c index b2131164..4313f78a 100644 --- a/freebsd/contrib/tcpdump/print-sflow.c +++ b/freebsd/contrib/tcpdump/print-sflow.c @@ -887,6 +887,14 @@ sflow_print(netdissect_options *ndo, tptr = pptr; tlen = len; sflow_datagram = (const struct sflow_datagram_t *)pptr; + if (len < sizeof(struct sflow_datagram_t)) { + ND_TCHECK(sflow_datagram->version); + ND_PRINT((ndo, "sFlowv%u", EXTRACT_32BITS(sflow_datagram->version))); + ND_PRINT((ndo, " [length %u < %zu]", + len, sizeof(struct sflow_datagram_t))); + ND_PRINT((ndo, " (invalid)")); + return; + } ND_TCHECK(*sflow_datagram); /* @@ -922,6 +930,8 @@ sflow_print(netdissect_options *ndo, /* skip Common header */ tptr += sizeof(const struct sflow_datagram_t); + + if(tlen <= sizeof(const struct sflow_datagram_t)) goto trunc; tlen -= sizeof(const struct sflow_datagram_t); while (nsamples > 0 && tlen > 0) { |