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Replaced firewalk scan states by a simpler boolean for readability reasons.

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henri
2011-04-29 16:40:45 +00:00
parent e57ebb15da
commit ef68defe0a
1 changed files with 6 additions and 11 deletions
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17
scripts/firewalk.nse
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@@ -109,11 +109,6 @@ local MaxProbedPorts
-- probed port states
local PSTATE_UNKNOWN = 0
local PSTATE_SCANNED = 1
-- ICMP constant
local ICMP_TIME_EXCEEDED = 11
@@ -158,7 +153,7 @@ local tcp_funcs = {
-- mark the gateway as forwarding the packet
scanner.ports.tcp[port].final_ttl = gateway_ttl(scanner.target.traceroute, packet.toip(ip.ip_bin_src))
scanner.ports.tcp[port].state = PSTATE_SCANNED
scanner.ports.tcp[port].scanned = true
-- remove the related probe
for i, probe in ipairs(scanner.active_probes) do
@@ -222,7 +217,7 @@ local udp_funcs = {
-- mark the gateway as forwarding the packet
scanner.ports.udp[port].final_ttl = gateway_ttl(scanner.target.traceroute, packet.toip(ip.ip_bin_src))
scanner.ports.udp[port].state = PSTATE_SCANNED
scanner.ports.udp[port].scanned = true
for i, probe in ipairs(scanner.active_probes) do
if probe.proto == "udp" and probe.portno == ip2.udp_dport then
@@ -311,8 +306,8 @@ local function build_portlist(host)
-- do not include administratively prohibited ports
if port and port.reason == "no-response" then
local pentry = {
final_ttl = 0, -- TTL of the blocking gateway
state = PSTATE_UNKNOWN, -- initial state: unprobed => unknown
final_ttl = 0, -- TTL of the blocking gateway
scanned = false, -- initial state: unprobed
}
portlist[proto][port.number] = pentry
@@ -651,7 +646,7 @@ local function finished(scanner)
for _, port in pairs(ports) do
-- if a port is still unprobed => we're not done!
if port.state == PSTATE_UNKNOWN then
if not port.scanned then
return false
end
end
@@ -792,7 +787,7 @@ local function update_probe_queues(scanner)
-- set final_ttl to zero (=> probe might be blocked by localhost)
scanner.ports[probe.proto][probe.portno].final_ttl = 0
scanner.ports[probe.proto][probe.portno].state = PSTATE_SCANNED
scanner.ports[probe.proto][probe.portno].scanned = true
end
end