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Allow doing --data-length 0. That's the documented way to turn off UDP

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payloads.
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david
2009-08-19 17:52:23 +00:00
parent ab09f1974f
commit fec2cc40d0
2 changed files with 5 additions and 6 deletions
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nmap.cc
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@@ -899,11 +899,11 @@ int nmap_main(int argc, char *argv[]) {
o.debugging++;
} else if (optcmp(long_options[option_index].name, "data-length") == 0) {
o.extra_payload_length = (int)strtol(optarg, NULL, 10);
if (o.extra_payload_length < 1 || o.extra_payload_length > MAX_PAYLOAD_ALLOWED)
if (o.extra_payload_length < 0 || o.extra_payload_length > MAX_PAYLOAD_ALLOWED)
fatal("data-length must be between 0 and %d", MAX_PAYLOAD_ALLOWED);
if (o.extra_payload_length > 1400 ) /* 1500 - IP with opts - TCP with opts. */
error("WARNING: Payloads bigger than 1400 bytes may not be sent successfully.");
o.extra_payload = (char *) safe_malloc(o.extra_payload_length);
o.extra_payload = (char *) safe_malloc(MIN(o.extra_payload_length, 1));
get_random_bytes(o.extra_payload, o.extra_payload_length);
} else if (optcmp(long_options[option_index].name, "send-eth") == 0) {
o.sendpref = PACKET_SEND_ETH_STRONG;