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nmap/nse_nmaplib.cc
batrick de4ba536de Merge from /nmap-exp/patrick/nse-nsock-maintenance. 
This is a maintenance fix for the NSE Nsock library binding. The patch focuses
on code correctness and simplicity. The patch also brings some initial updates
with an eye towards the upcoming Lua 5.2 release. See [1] for a post concerning
this branch.

[1] http://seclists.org/nmap-dev/2010/q3/710
2010-09-18 20:35:09 +00:00

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extern "C" {
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
}
#include <math.h>
#include "nmap.h"
#include "nmap_error.h"
#include "NmapOps.h"
#include "Target.h"
#include "TargetGroup.h"
#include "portlist.h"
#include "service_scan.h"
#include "nmap_rpc.h"
#include "nmap_dns.h"
#include "osscan.h"
#include "protocols.h"
#include "nse_nmaplib.h"
#include "nse_utility.h"
#include "nse_nsock.h"
#include "nse_dnet.h"
extern NmapOps o;
static const char *NSE_PROTOCOL_OP[] = {"tcp", "udp", "sctp", NULL};
static const int NSE_PROTOCOL[] = {IPPROTO_TCP, IPPROTO_UDP, IPPROTO_SCTP};
void set_version (lua_State *L, const struct serviceDeductions *sd)
{
setsfield(L, -1, "name", sd->name);
setnfield(L, -1, "name_confidence", sd->name_confidence);
setsfield(L, -1, "product", sd->product);
setsfield(L, -1, "version", sd->version);
setsfield(L, -1, "extrainfo", sd->extrainfo);
setsfield(L, -1, "hostname", sd->hostname);
setsfield(L, -1, "ostype", sd->ostype);
setsfield(L, -1, "devicetype", sd->devicetype);
setsfield(L, -1, "service_tunnel",
sd->service_tunnel == SERVICE_TUNNEL_NONE ? "none" :
sd->service_tunnel == SERVICE_TUNNEL_SSL ? "ssl" :
NULL);
setsfield(L, -1, "service_fp", sd->service_fp);
setsfield(L, -1, "service_dtype",
sd->dtype == SERVICE_DETECTION_TABLE ? "table" :
sd->dtype == SERVICE_DETECTION_PROBED ? "probed" :
NULL);
setsfield(L, -1, "rpc_status",
sd->rpc_status == RPC_STATUS_UNTESTED ? "untested" :
sd->rpc_status == RPC_STATUS_UNKNOWN ? "unknown" :
sd->rpc_status == RPC_STATUS_GOOD_PROG ? "good_prog" :
sd->rpc_status == RPC_STATUS_NOT_RPC ? "not_rpc" :
NULL);
if (sd->rpc_status == RPC_STATUS_GOOD_PROG)
{
setnfield(L, -1, "rpc_program", sd->rpc_program);
setnfield(L, -1, "rpc_lowver", sd->rpc_lowver);
setnfield(L, -1, "rpc_highver", sd->rpc_highver);
}
}
/* set some port state information onto the
* table which is currently on the stack
* */
void set_portinfo (lua_State *L, const Target *target, const Port *port)
{
struct serviceDeductions sd;
target->ports.getServiceDeductions(port->portno, port->proto, &sd);
setnfield(L, -1, "number", port->portno);
setsfield(L, -1, "service", sd.name);
setsfield(L, -1, "protocol", IPPROTO2STR(port->proto));
setsfield(L, -1, "state", statenum2str(port->state));
setsfield(L, -1, "reason", reason_str(port->reason.reason_id, 1));
lua_newtable(L);
set_version(L, &sd);
lua_setfield(L, -2, "version");
}
/* set host ip, host name and target name onto the
* table which is currently on the stack
* set name of the os run by the host onto the
* table which is currently on the stack
* the os name is really an array with perfect
* matches
* if an os scan wasn't performed, the array
* points to nil!
* */
void set_hostinfo(lua_State *L, Target *currenths) {
setsfield(L, -1, "ip", currenths->targetipstr());
setsfield(L, -1, "name", currenths->HostName());
setsfield(L, -1, "targetname", currenths->TargetName());
if (currenths->directlyConnectedOrUnset() != -1)
setbfield(L, -1, "directly_connected", currenths->directlyConnected());
if (currenths->MACAddress())
{
lua_pushlstring(L, (const char *) currenths->MACAddress() , 6);
lua_setfield(L, -2, "mac_addr");
}
if (currenths->NextHopMACAddress())
{
lua_pushlstring(L, (const char *) currenths->NextHopMACAddress() , 6);
lua_setfield(L, -2, "mac_addr_next_hop");
}
if (currenths->SrcMACAddress())
{
lua_pushlstring(L, (const char *) currenths->SrcMACAddress(), 6);
lua_setfield(L, -2, "mac_addr_src");
}
setsfield(L, -1, "interface", currenths->deviceName());
setnfield(L, -1, "interface_mtu", currenths->MTU());
if ((u32)(currenths->v4host().s_addr))
{
struct in_addr adr = currenths->v4host();
lua_pushlstring(L, (const char *) &adr, 4);
lua_setfield(L, -2, "bin_ip");
}
if ((u32)(currenths->v4source().s_addr))
{
struct in_addr adr = currenths->v4source();
lua_pushlstring(L, (const char *) &adr, 4);
lua_setfield(L, -2, "bin_ip_src");
}
lua_newtable(L);
setnfield(L, -1, "srtt", (lua_Number) currenths->to.srtt / 1000000.0);
setnfield(L, -1, "rttvar", (lua_Number) currenths->to.rttvar / 1000000.0);
setnfield(L, -1, "timeout", (lua_Number) currenths->to.timeout / 1000000.0);
lua_setfield(L, -2, "times");
/* add distance (in hops) if traceroute has been performed */
if (currenths->traceroute_hops.size() > 0)
{
std::list<TracerouteHop>::iterator it;
int i = 1;
lua_newtable(L);
for (it = currenths->traceroute_hops.begin(); it != currenths->traceroute_hops.end(); it++)
{
lua_pushinteger(L, i++);
lua_newtable(L);
/* fill the table if the hop has not timed out, otherwise an empty table
* is inserted */
if (!it->timedout) {
setsfield(L, -1, "ip", inet_ntop_ez(&it->addr, sizeof(it->addr)));
if (!it->name.empty())
setsfield(L, -1, "name", it->name.c_str());
lua_newtable(L);
setnfield(L, -1, "srtt", it->rtt / 1000.0);
lua_setfield(L, -2, "times");
}
lua_settable(L, -3);
}
lua_setfield(L, -2, "traceroute");
}
FingerPrintResults *FPR = currenths->FPR;
/* if there has been an os scan which returned a pretty certain
* result, we will use it in the scripts
* matches which aren't perfect are not needed in the scripts
*/
if (currenths->osscanPerformed() && FPR != NULL &&
FPR->overall_results == OSSCAN_SUCCESS && FPR->num_perfect_matches > 0 &&
FPR->num_perfect_matches <= 8 )
{
int i;
lua_newtable(L);
// this will run at least one time and at most 8 times, see if condition
for(i = 0; FPR->accuracy[i] == 1; i++) {
lua_pushstring(L, FPR->prints[i]->OS_name);
lua_rawseti(L, -2, i+1);
}
lua_setfield(L, -2, "os");
}
}
static int l_clock_ms (lua_State *L)
{
struct timeval tv;
gettimeofday(&tv, NULL);
/* milliseconds since Epoch */
lua_pushnumber(L,
ceil((lua_Number)tv.tv_sec*1000+(lua_Number)tv.tv_usec/1000));
return 1;
}
static int l_clock (lua_State *L)
{
struct timeval tv;
gettimeofday(&tv, NULL);
/* floating point seconds since Epoch */
lua_pushnumber(L, TIMEVAL_SECS(tv));
return 1;
}
/* The actual mutex returned by the nmap.mutex function.
* This function has 4 upvalues:
* (1) Table (array) of waiting threads.
* (2) The running thread or nil.
* (3) A unique table key used for destructors.
* (4) The destructor function, aux_mutex_done.
*/
static int aux_mutex (lua_State *L)
{
enum what {LOCK, DONE, TRYLOCK, RUNNING};
static const char * op[] = {"lock", "done", "trylock", "running", NULL};
switch (luaL_checkoption(L, 1, NULL, op))
{
case LOCK:
if (lua_isnil(L, lua_upvalueindex(2))) // check running
{
lua_pushthread(L);
lua_replace(L, lua_upvalueindex(2)); // set running
lua_pushvalue(L, lua_upvalueindex(3)); // unique identifier
lua_pushvalue(L, lua_upvalueindex(4)); // aux_mutex_done closure
nse_destructor(L, 'a');
return 0;
}
lua_pushthread(L);
lua_rawseti(L, lua_upvalueindex(1), lua_objlen(L, lua_upvalueindex(1))+1);
return nse_yield(L, 0, NULL);
case DONE:
lua_pushthread(L);
if (!lua_equal(L, -1, lua_upvalueindex(2)))
luaL_error(L, "%s", "do not have a lock on this mutex");
/* remove destructor */
lua_pushvalue(L, lua_upvalueindex(3));
nse_destructor(L, 'r');
/* set new thread to lock the mutex */
lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
lua_getfield(L, -1, "table");
lua_getfield(L, -1, "remove");
lua_pushvalue(L, lua_upvalueindex(1));
lua_pushinteger(L, 1);
lua_call(L, 2, 1);
lua_replace(L, lua_upvalueindex(2));
if (lua_isthread(L, lua_upvalueindex(2))) // waiting threads had a thread
{
lua_State *thread = lua_tothread(L, lua_upvalueindex(2));
lua_pushvalue(L, lua_upvalueindex(3)); // destructor key
lua_pushvalue(L, lua_upvalueindex(4)); // destructor
luaL_checkstack(thread, 2, "adding destructor");
lua_xmove(L, thread, 2);
nse_destructor(thread, 'a');
nse_restore(thread, 0);
}
return 0;
case TRYLOCK:
if (lua_isnil(L, lua_upvalueindex(2)))
{
lua_pushthread(L);
lua_replace(L, lua_upvalueindex(2));
lua_pushvalue(L, lua_upvalueindex(3)); // unique identifier
lua_pushvalue(L, lua_upvalueindex(4)); // aux_mutex_done closure
nse_destructor(L, 'a');
lua_pushboolean(L, true);
}
else
lua_pushboolean(L, false);
return 1;
case RUNNING:
lua_pushvalue(L, lua_upvalueindex(2));
return 1;
}
return 0;
}
/* This is the mutex destructor called when a thread ends but failed to
* unlock the mutex.
* It has 1 upvalue: The nmap.mutex function closure.
*/
static int aux_mutex_done (lua_State *L)
{
lua_State *thread = lua_tothread(L, 1);
lua_pushvalue(L, lua_upvalueindex(1)); // aux_mutex, actual mutex closure
lua_pushliteral(L, "done");
luaL_checkstack(thread, 2, "aux_mutex_done");
lua_xmove(L, thread, 2);
if (lua_pcall(thread, 1, 0, 0) != 0) lua_pop(thread, 1); // pop error msg
return 0;
}
static int l_mutex (lua_State *L)
{
int t = lua_type(L, 1);
if (t == LUA_TNONE || t == LUA_TNIL || t == LUA_TBOOLEAN || t == LUA_TNUMBER)
luaL_argerror(L, 1, "object expected");
lua_pushvalue(L, 1);
lua_gettable(L, lua_upvalueindex(1));
if (lua_isnil(L, -1))
{
lua_newtable(L); // waiting threads
lua_pushnil(L); // running thread
lua_newtable(L); // unique object as an identifier
lua_pushnil(L); // placeholder for aux_mutex_done
lua_pushcclosure(L, aux_mutex, 4);
lua_pushvalue(L, -1); // mutex closure
lua_pushcclosure(L, aux_mutex_done, 1);
lua_setupvalue(L, -2, 4); // replace nil upvalue with aux_mutex_done
lua_pushvalue(L, 1); // "mutex object"
lua_pushvalue(L, -2); // mutex function
lua_settable(L, lua_upvalueindex(1)); // Add to mutex table
}
return 1; // aux_mutex closure
}
static int aux_condvar (lua_State *L)
{
size_t i, n = 0;
enum {WAIT, SIGNAL, BROADCAST};
static const char * op[] = {"wait", "signal", "broadcast"};
switch (luaL_checkoption(L, 1, NULL, op))
{
case WAIT:
lua_pushthread(L);
lua_rawseti(L, lua_upvalueindex(1), lua_objlen(L, lua_upvalueindex(1))+1);
return nse_yield(L, 0, NULL);
case SIGNAL:
n = lua_objlen(L, lua_upvalueindex(1));
break;
case BROADCAST:
n = 1;
break;
}
lua_pushvalue(L, lua_upvalueindex(1));
for (i = lua_objlen(L, -1); i >= n; i--)
{
lua_rawgeti(L, -1, i); /* get the thread */
if (lua_isthread(L, -1))
nse_restore(lua_tothread(L, -1), 0);
lua_pop(L, 1); /* pop the thread */
lua_pushnil(L);
lua_rawseti(L, -2, i);
}
return 0;
}
static int aux_condvar_done (lua_State *L)
{
lua_State *thread = lua_tothread(L, 1);
lua_pushvalue(L, lua_upvalueindex(1)); // aux_condvar closure
lua_pushliteral(L, "broadcast"); // wake up all threads waiting
luaL_checkstack(thread, 2, "aux_condvar_done");
lua_xmove(L, thread, 2);
if (lua_pcall(thread, 1, 0, 0) != 0) lua_pop(thread, 1); // pop error msg
return 0;
}
static int l_condvar (lua_State *L)
{
int t = lua_type(L, 1);
if (t == LUA_TNONE || t == LUA_TNIL || t == LUA_TBOOLEAN || t == LUA_TNUMBER)
luaL_argerror(L, 1, "object expected");
lua_pushvalue(L, 1);
lua_gettable(L, lua_upvalueindex(1));
if (lua_isnil(L, -1))
{
lua_newtable(L); // waiting threads
lua_pushnil(L); // placeholder for aux_mutex_done
lua_pushcclosure(L, aux_condvar, 2);
lua_pushvalue(L, -1); // aux_condvar closure
lua_pushcclosure(L, aux_condvar_done, 1);
lua_setupvalue(L, -2, 2); // replace nil upvalue with aux_condvar_done
lua_pushvalue(L, 1); // "condition variable object"
lua_pushvalue(L, -2); // condvar function
lua_settable(L, lua_upvalueindex(1)); // Add to condition variable table
}
lua_pushvalue(L, -1); // aux_condvar closure
lua_getupvalue(L, -1, 2); // aux_mutex_done closure
nse_destructor(L, 'a');
return 1; // condition variable closure
}
/* Generates an array of port data for the given host and leaves it on
* the top of the stack
*/
static int l_get_ports (lua_State *L)
{
static const char *state_op[] = {"open", "filtered", "unfiltered", "closed",
"open|filtered", "closed|filtered", NULL};
static const int states[] = {PORT_OPEN, PORT_FILTERED, PORT_UNFILTERED,
PORT_CLOSED, PORT_OPENFILTERED, PORT_CLOSEDFILTERED};
Port *p = NULL;
Port port; /* dummy Port for nextPort */
Target *target = get_target(L, 1);
int protocol = NSE_PROTOCOL[luaL_checkoption(L, 3, NULL, NSE_PROTOCOL_OP)];
int state = states[luaL_checkoption(L, 4, NULL, state_op)];
if (!lua_isnil(L, 2))
p = get_port(L, target, &port, 2);
if (!(p = target->ports.nextPort(p, &port, protocol, state))) {
lua_pushnil(L);
} else {
lua_newtable(L);
set_portinfo(L, target, p);
}
return 1;
}
/* this function can be called from lua to obtain the port state
* of a port different from the one the script rule is matched
* against
* it retrieves the host.ip of the host on which the script is
* currently running, looks up the host in the table of currently
* processed hosts and returns a table containing the state of
* the port we have been asked for
* this function is useful if we want rules which want to know
* the state of more than one port
* */
static int l_get_port_state (lua_State *L)
{
Target *target;
Port *p;
Port port; /* dummy Port */
target = get_target(L, 1);
p = get_port(L, target, &port, 2);
if (p == NULL)
lua_pushnil(L);
else
{
lua_newtable(L);
set_portinfo(L, target, p);
}
return 1;
}
/* this function must be used by version category scripts or any other
* lua code to check if a given port with it's protocol are in the
* exclude directive found in the nmap-service-probes file.
* */
static int l_port_is_excluded (lua_State *L)
{
unsigned short portno = (unsigned short) luaL_checkint(L, 1);
int protocol = NSE_PROTOCOL[luaL_checkoption(L, 2, NULL, NSE_PROTOCOL_OP)];
lua_pushboolean(L, AllProbes::check_excluded_port(portno, protocol));
return 1;
}
/* unlike set_portinfo() this function sets the port state in nmap.
* if for example a udp port was seen by the script as open instead of
* filtered, the script is free to say so.
* */
static int l_set_port_state (lua_State *L)
{
static const int opstate[] = {PORT_OPEN, PORT_CLOSED};
static const char *op[] = {"open", "closed", NULL};
Target *target;
Port *p;
Port port;
target = get_target(L, 1);
if ((p = get_port(L, target, &port, 2)) != NULL)
{
switch (opstate[luaL_checkoption(L, 3, NULL, op)])
{
case PORT_OPEN:
if (p->state == PORT_OPEN)
return 0;
target->ports.setPortState(p->portno, p->proto, PORT_OPEN);
break;
case PORT_CLOSED:
if (p->state == PORT_CLOSED)
return 0;
target->ports.setPortState(p->portno, p->proto, PORT_CLOSED);
break;
}
target->ports.setStateReason(p->portno, p->proto, ER_SCRIPT, 0, 0);
}
return 0;
}
static int l_set_port_version (lua_State *L)
{
static const enum serviceprobestate opversion[] = {
PROBESTATE_FINISHED_HARDMATCHED,
PROBESTATE_FINISHED_SOFTMATCHED,
PROBESTATE_FINISHED_NOMATCH,
PROBESTATE_FINISHED_TCPWRAPPED,
PROBESTATE_INCOMPLETE
};
static const char *ops[] = {
"hardmatched",
"softmatched",
"nomatch",
"tcpwrapped",
"incomplete"
};
Target *target;
Port *p;
Port port;
enum service_tunnel_type tunnel = SERVICE_TUNNEL_NONE;
enum serviceprobestate probestate =
opversion[luaL_checkoption(L, 3, "hardmatched", ops)];
target = get_target(L, 1);
if ((p = get_port(L, target, &port, 2)) == NULL)
return 0; /* invalid port */
lua_settop(L, 3);
lua_getfield(L, 2, "version"); /* index 4 */
if (!lua_istable(L, -1))
luaL_error(L, "port 'version' field must be a table");
const char
*name = (lua_getfield(L, 4, "name"), lua_tostring(L, -1)),
*product = (lua_getfield(L, 4, "product"), lua_tostring(L, -1)),
*version = (lua_getfield(L, 4, "version"), lua_tostring(L, -1)),
*extrainfo = (lua_getfield(L, 4, "extrainfo"), lua_tostring(L, -1)),
*hostname = (lua_getfield(L, 4, "hostname"), lua_tostring(L, -1)),
*ostype = (lua_getfield(L, 4, "ostype"), lua_tostring(L, -1)),
*devicetype = (lua_getfield(L, 4, "devicetype"), lua_tostring(L, -1)),
*service_tunnel = (lua_getfield(L, 4, "service_tunnel"),
lua_tostring(L, -1));
if (service_tunnel == NULL || strcmp(service_tunnel, "none") == 0)
tunnel = SERVICE_TUNNEL_NONE;
else if (strcmp(service_tunnel, "ssl") == 0)
tunnel = SERVICE_TUNNEL_SSL;
else
luaL_argerror(L, 2, "invalid value for port.version.service_tunnel");
if (o.servicescan)
target->ports.setServiceProbeResults(p->portno, p->proto,
probestate, name, tunnel, product,
version, extrainfo, hostname, ostype, devicetype, NULL);
else
target->ports.setServiceProbeResults(p->portno, p->proto,
probestate, name, tunnel, NULL, NULL,
NULL, NULL, NULL, NULL, NULL);
return 0;
}
static int l_log_write (lua_State *L)
{
static const char * const ops[] = {"stdout", "stderr", NULL};
static const int logs[] = {LOG_STDOUT, LOG_STDERR};
int log = logs[luaL_checkoption(L, 1, NULL, ops)];
log_write(log, "%s: %s\n", SCRIPT_ENGINE, luaL_checkstring(L, 2));
log_flush(log);
return 0;
}
static int new_try_finalize (lua_State *L)
{
if (!(lua_isboolean(L, 1) || lua_isnoneornil(L, 1)))
error("finalizing a non-conforming function that did not first "
"return a boolean");
if (!lua_toboolean(L, 1))
{
if (!lua_isnil(L, lua_upvalueindex(1)))
{
lua_pushvalue(L, lua_upvalueindex(1));
lua_call(L, 0, 0);
}
lua_settop(L, 2);
lua_error(L);
}
return lua_gettop(L)-1; /* omit first boolean argument */
}
static int l_new_try (lua_State *L)
{
lua_settop(L, 1);
lua_pushcclosure(L, new_try_finalize, 1);
return 1;
}
static int l_get_verbosity (lua_State *L)
{
int verbosity;
verbosity = o.verbose;
/* Check if script is selected by name. When a script is selected by name,
we lie to it and say the verbosity is one higher than it really is. */
verbosity += (nse_selectedbyname(L), lua_toboolean(L, -1) ? 1 : 0);
lua_pushnumber(L, verbosity);
return 1;
}
static int l_get_debugging (lua_State *L)
{
lua_pushnumber(L, o.debugging);
return 1;
}
static int l_get_have_ssl (lua_State *L) {
#if HAVE_OPENSSL
lua_pushboolean(L, true);
#else
lua_pushboolean(L, false);
#endif
return 1;
}
static int l_fetchfile (lua_State *L)
{
char buf[FILENAME_MAX];
if (nmap_fetchfile(buf, sizeof(buf), luaL_checkstring(L, 1)) != 1)
lua_pushnil(L);
else
lua_pushstring(L, buf);
return 1;
}
static int l_get_timing_level (lua_State *L)
{
lua_pushnumber(L, o.timing_level);
return 1;
}
/* Save new discovered targets.
*
* This function can take a Vararg expression:
* A vararg expression that represents targets (IPs or Hostnames).
*
* Returns two values if it receives target arguments:
* The number of targets that were added, or 0 on failures.
* An error message on failures.
*
* If this function was called without an argument then it
* will simply return the number of pending targets that are
* in the queue (waiting to be passed to Nmap).
*
* If the function was only able to add a one target, then we
* consider this success. */
static int l_add_targets (lua_State *L)
{
int n;
unsigned long ntarget = 0;
if (lua_gettop(L) > 0) {
for (n = 1; n <= lua_gettop(L); n++) {
if (!NewTargets::insert(luaL_checkstring(L, n)))
break;
ntarget++;
}
/* was able to add some targets */
if (ntarget) {
lua_pushnumber(L, ntarget);
return 1;
/* errors */
} else {
lua_pushnumber(L, ntarget);
lua_pushstring(L, "failed to add new targets.");
return 2;
}
} else {
/* function called without arguments */
/* push the number of pending targets that are in the queue */
lua_pushnumber(L, NewTargets::insert(""));
return 1;
}
}
/* Return the number of added targets */
static int l_get_new_targets_num (lua_State *L)
{
lua_pushnumber(L, NewTargets::get_number());
return 1;
}
// returns a table with DNS servers known to nmap
static int l_get_dns_servers (lua_State *L)
{
std::list<std::string> servs2 = get_dns_servers();
std::list<std::string>::iterator servI2;
int i = 1;
lua_newtable(L);
for(servI2 = servs2.begin(); servI2 != servs2.end(); servI2++) {
lua_pushstring(L, servI2->c_str());
lua_rawseti(L, -2, i++);
}
return 1;
}
static int l_is_privileged(lua_State *L)
{
lua_pushboolean(L, o.isr00t);
return 1;
}
/* Takes a host and optional address family and returns a table of
* addresses
*/
static int l_resolve(lua_State *L)
{
static const char *fam_op[] = { "inet", "inet6", "unspec", NULL };
static const int fams[] = { AF_INET, AF_INET6, AF_UNSPEC };
struct sockaddr_storage ss;
struct addrinfo *addr, *addrs;
int i;
char *host;
int af = fams[luaL_checkoption(L, 2, "unspec", fam_op)];
if (!lua_isstring(L, 1))
luaL_error(L, "Host to resolve must be a string");
host = (char *) lua_tostring(L, 1);
addrs = resolve_all(host, af);
if (!addrs) {
lua_pushboolean(L, false);
lua_pushstring(L, "Failed to resolve");
return 2;
}
lua_pushboolean(L, true);
lua_newtable(L);
for (addr = addrs, i = 1; addr != NULL; addr = addr->ai_next) {
if (af != AF_UNSPEC && addr->ai_family != af)
continue;
if (addr->ai_addrlen > sizeof(ss))
continue;
memcpy(&ss, addr->ai_addr, addr->ai_addrlen);
lua_pushstring(L, inet_socktop(&ss));
lua_rawseti(L, -2, i++);
}
freeaddrinfo(addrs);
return 2;
}
static int l_address_family(lua_State *L)
{
if (o.af() == AF_INET)
lua_pushstring(L, "inet");
else
lua_pushstring(L, "inet6");
return 1;
}
int luaopen_nmap (lua_State *L)
{
static const luaL_reg nmaplib [] = {
{"get_port_state", l_get_port_state},
{"get_ports", l_get_ports},
{"set_port_state", l_set_port_state},
{"set_port_version", l_set_port_version},
{"port_is_excluded", l_port_is_excluded},
{"new_socket", l_nsock_new},
{"new_dnet", l_dnet_new},
{"get_interface_link", l_dnet_get_interface_link},
{"clock_ms", l_clock_ms},
{"clock", l_clock},
{"log_write", l_log_write},
{"new_try", l_new_try},
{"verbosity", l_get_verbosity},
{"debugging", l_get_debugging},
{"have_ssl", l_get_have_ssl},
{"fetchfile", l_fetchfile},
{"timing_level", l_get_timing_level},
{"add_targets", l_add_targets},
{"new_targets_num",l_get_new_targets_num},
{"get_dns_servers", l_get_dns_servers},
{"is_privileged", l_is_privileged},
{"resolve", l_resolve},
{"address_family", l_address_family},
{NULL, NULL}
};
lua_settop(L, 0); // clear stack
luaL_register(L, "nmap", nmaplib);
weak_table(L, 0, 0, "v"); /* allow closures to be collected (see l_mutex) */
lua_pushcclosure(L, l_mutex, 1); /* mutex function */
lua_setfield(L, -2, "mutex");
weak_table(L, 0, 0, "v"); /* allow closures to be collected (see l_condvar) */
lua_pushcclosure(L, l_condvar, 1); // condvar function
lua_setfield(L, -2, "condvar");
lua_newtable(L);
lua_setfield(L, -2, "registry");
lua_pushcclosure(L, luaopen_nsock, 0);
lua_pushliteral(L, "nsock");
lua_call(L, 1, 0);
lua_pushcclosure(L, luaopen_dnet, 0);
lua_pushliteral(L, "dnet");
lua_call(L, 1, 0);
lua_settop(L, 1); // just nmap lib on stack
return 1;
}
/* Register C functions that belong in the stdnse namespace. They are loaded
from here in stdnse.lua. */
int luaopen_stdnse_c (lua_State *L)
{
static const luaL_reg stdnse_clib [] = {
{"sleep", l_nsock_sleep},
{NULL, NULL}
};
luaL_register(L, "stdnse.c", stdnse_clib);
return 1;
}
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