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Use lua_createtable to prealloc some tables, saving time & memory

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This commit is contained in:
dmiller
2018-06-28 03:43:25 +00:00
parent 7d724a69a2
commit e4f65348cb
4 changed files with 42 additions and 26 deletions
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2
nse_main.cc
View File

@@ -105,7 +105,7 @@ static int ports (lua_State *L)
while ((current = plist->nextPort(current, &port, TCPANDUDPANDSCTP,
states[i])) != NULL)
{
lua_newtable(L);
lua_createtable(L, 0, NSE_NUM_PORTINFO_FIELDS);
set_portinfo(L, target, current);
lua_pushboolean(L, 1);
lua_rawset(L, -3);

39
nse_nmaplib.cc
View File

@@ -31,6 +31,10 @@ extern NmapOps o;
static const char *NSE_PROTOCOL_OP[] = {"tcp", "udp", "sctp", NULL};
static const int NSE_PROTOCOL[] = {IPPROTO_TCP, IPPROTO_UDP, IPPROTO_SCTP};
// Number of fields in the "version" table
// used as a hint to Lua when allocating it
#define NSE_NUM_VERSION_FIELDS 12
void set_version (lua_State *L, const struct serviceDeductions *sd)
{
nseU_setsfield(L, -1, "name", sd->name);
@@ -50,7 +54,7 @@ void set_version (lua_State *L, const struct serviceDeductions *sd)
sd->dtype == SERVICE_DETECTION_TABLE ? "table" :
sd->dtype == SERVICE_DETECTION_PROBED ? "probed" :
NULL);
lua_newtable(L);
lua_createtable(L, sd->cpe.size(), 0);
for (size_t i = 0; i < sd->cpe.size(); i++) {
lua_pushstring(L, sd->cpe[i]);
lua_rawseti(L, -2, i+1);
@@ -73,7 +77,7 @@ void set_portinfo (lua_State *L, const Target *target, const Port *port)
nseU_setsfield(L, -1, "state", statenum2str(port->state));
nseU_setsfield(L, -1, "reason", reason_str(port->reason.reason_id, 1));
nseU_setifield(L, -1, "reason_ttl", port->reason.ttl);
lua_newtable(L);
lua_createtable(L, 0, NSE_NUM_VERSION_FIELDS);
set_version(L, &sd);
lua_setfield(L, -2, "version");
}
@@ -108,14 +112,15 @@ static void push_osclass_table(lua_State *L,
const struct OS_Classification *osclass) {
unsigned int i;
lua_newtable(L);
#define NSE_NUM_OSCLASS_FIELDS 5
lua_createtable(L, 0, NSE_NUM_OSCLASS_FIELDS);
set_string_or_nil(L, "vendor", osclass->OS_Vendor);
set_string_or_nil(L, "osfamily", osclass->OS_Family);
set_string_or_nil(L, "osgen", osclass->OS_Generation);
set_string_or_nil(L, "type", osclass->Device_Type);
lua_newtable(L);
lua_createtable(L, osclass->cpe.size(), 0);
for (i = 0; i < osclass->cpe.size(); i++) {
lua_pushstring(L, osclass->cpe[i]);
lua_rawseti(L, -2, i + 1);
@@ -127,12 +132,13 @@ static void push_osmatch_table(lua_State *L, const FingerMatch *match,
const OS_Classification_Results *OSR) {
int i;
lua_newtable(L);
#define NSE_NUM_OSMATCH_FIELDS 2
lua_createtable(L, 0, NSE_NUM_OSMATCH_FIELDS);
lua_pushstring(L, match->OS_name);
lua_setfield(L, -2, "name");
lua_newtable(L);
lua_createtable(L, OSR->OSC_num_matches, 0);
for (i = 0; i < OSR->OSC_num_matches; i++) {
push_osclass_table(L, OSR->OSC[i]);
lua_rawseti(L, -2, i + 1);
@@ -181,7 +187,8 @@ void set_hostinfo(lua_State *L, Target *currenths) {
push_bin_ip(L, currenths->SourceSockAddr());
lua_setfield(L, -2, "bin_ip_src");
lua_newtable(L);
#define NSE_NUM_TIMES_FIELDS 3
lua_createtable(L, 0, NSE_NUM_TIMES_FIELDS);
nseU_setnfield(L, -1, "srtt", (lua_Number) currenths->to.srtt / 1000000.0);
nseU_setnfield(L, -1, "rttvar", (lua_Number) currenths->to.rttvar / 1000000.0);
nseU_setnfield(L, -1, "timeout", (lua_Number) currenths->to.timeout / 1000000.0);
@@ -195,10 +202,11 @@ void set_hostinfo(lua_State *L, Target *currenths) {
{
std::list<TracerouteHop>::iterator it;
lua_newtable(L);
lua_createtable(L, currenths->traceroute_hops.size(), 0);
for (it = currenths->traceroute_hops.begin(); it != currenths->traceroute_hops.end(); it++)
{
lua_newtable(L);
#define NSE_NUM_TRACEROUTE_FIELDS 3
lua_createtable(L, 0, NSE_NUM_TRACEROUTE_FIELDS);
/* fill the table if the hop has not timed out, otherwise an empty table
* is inserted */
if (!it->timedout) {
@@ -230,7 +238,7 @@ void set_hostinfo(lua_State *L, Target *currenths) {
int i;
const OS_Classification_Results *OSR = FPR->getOSClassification();
lua_newtable(L);
lua_createtable(L, FPR->num_perfect_matches, 0);
for (i = 0; i < FPR->num_perfect_matches; i++) {
push_osmatch_table(L, FPR->matches[i], OSR);
lua_rawseti(L, -2, i + 1);
@@ -460,7 +468,7 @@ static int l_get_ports (lua_State *L)
if (!(p = target->ports.nextPort(p, &port, protocol, state))) {
lua_pushnil(L);
} else {
lua_newtable(L);
lua_createtable(L, 0, NSE_NUM_PORTINFO_FIELDS);
set_portinfo(L, target, p);
}
return 1;
@@ -487,7 +495,7 @@ static int l_get_port_state (lua_State *L)
lua_pushnil(L);
else
{
lua_newtable(L);
lua_createtable(L, 0, NSE_NUM_PORTINFO_FIELDS);
set_portinfo(L, target, p);
}
return 1;
@@ -791,7 +799,7 @@ static int l_get_dns_servers (lua_State *L)
std::list<std::string> servs2 = get_dns_servers();
std::list<std::string>::iterator servI2;
lua_newtable(L);
lua_createtable(L, servs2.size(), 0);
for (servI2 = servs2.begin(); servI2 != servs2.end(); servI2++)
nseU_appendfstr(L, -1, "%s", servI2->c_str());
return 1;
@@ -882,10 +890,11 @@ static int l_list_interfaces (lua_State *L)
memset(ipstr, 0, INET6_ADDRSTRLEN);
memset(&src, 0, sizeof(src));
memset(&bcast, 0, sizeof(bcast));
lua_newtable(L); //base table
lua_createtable(L, numifs, 0); //base table
for(i=0; i< numifs; i++) {
lua_newtable(L); //interface table
#define NSE_NUM_INTERFACE_FIELDS 9
lua_createtable(L, 0, NSE_NUM_INTERFACE_FIELDS); //interface table
nseU_setsfield(L, -1, "device", iflist[i].devfullname);
nseU_setsfield(L, -1, "shortname", iflist[i].devname);
nseU_setifield(L, -1, "netmask", iflist[i].netmask_bits);

2
nse_nmaplib.h
View File

@@ -7,7 +7,9 @@ class Target;
class Port;
int luaopen_nmap(lua_State* l);
#define NSE_NUM_HOSTINFO_FIELDS 17
void set_hostinfo(lua_State* l, Target* currenths);
#define NSE_NUM_PORTINFO_FIELDS 7
void set_portinfo(lua_State* l, const Target *target, const Port* port);
#endif

25
nse_ssl_cert.cc
View File

@@ -265,7 +265,7 @@ static void x509_name_to_table(lua_State *L, X509_NAME *name)
{
int i;
lua_newtable(L);
lua_createtable(L, 0, X509_NAME_entry_count(name));
for (i = 0; i < X509_NAME_entry_count(name); i++) {
X509_NAME_ENTRY *entry;
@@ -288,7 +288,7 @@ static bool x509_extensions_to_table(lua_State *L, const STACK_OF(X509_EXTENSION
if (sk_X509_EXTENSION_num(exts) <= 0)
return false;
lua_newtable(L);
lua_createtable(L, sk_X509_EXTENSION_num(exts), 0);
for (int i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
ASN1_OBJECT *obj;
@@ -299,7 +299,8 @@ static bool x509_extensions_to_table(lua_State *L, const STACK_OF(X509_EXTENSION
ext = sk_X509_EXTENSION_value(exts, i);
obj = X509_EXTENSION_get_object(ext);
lua_newtable(L);
#define NSE_NUM_X509_EXTENSION_FIELDS 3
lua_createtable(L, 0, NSE_NUM_X509_EXTENSION_FIELDS);
char objname[256];
long len = 0;
len = OBJ_obj2txt(objname, 256, obj, 0);
@@ -324,7 +325,7 @@ static bool x509_extensions_to_table(lua_State *L, const STACK_OF(X509_EXTENSION
}
BIO_free_all(out);
lua_seti(L, -2, i+1);
lua_rawseti(L, -2, i+1);
}
return true;
@@ -418,7 +419,8 @@ static int time_to_tm(const ASN1_TIME *t, struct tm *result)
that the wday and yday fields are not present. */
static void tm_to_table(lua_State *L, const struct tm *tm)
{
lua_newtable(L);
#define NSE_NUM_TM_FIELDS 6
lua_createtable(L, 0, NSE_NUM_TM_FIELDS);
lua_pushnumber(L, tm->tm_year);
lua_setfield(L, -2, "year");
@@ -459,7 +461,8 @@ static void asn1_time_to_obj(lua_State *L, const ASN1_TIME *s)
from asn1_time_to_obj. */
static void x509_validity_to_table(lua_State *L, X509 *cert)
{
lua_newtable(L);
#define NSE_NUM_VALIDITY_FIELDS 2
lua_createtable(L, 0, NSE_NUM_VALIDITY_FIELDS);
asn1_time_to_obj(L, X509_get0_notBefore(cert));
lua_setfield(L, -2, "notBefore");
@@ -512,8 +515,8 @@ int lua_push_ecdhparams(lua_State *L, EVP_PKEY *pubkey) {
const EC_GROUP *group = EC_KEY_get0_group(ec_key);
int nid;
/* This structure (ecdhparams.curve_params) comes from tls.lua */
lua_newtable(L); /* ecdhparams */
lua_newtable(L); /* curve_params */
lua_createtable(L, 0, 1); /* ecdhparams */
lua_createtable(L, 0, 2); /* curve_params */
if ((nid = EC_GROUP_get_curve_name(group)) != 0) {
lua_pushstring(L, OBJ_nid2sn(nid));
lua_setfield(L, -2, "curve");
@@ -591,7 +594,8 @@ static int parse_ssl_cert(lua_State *L, X509 *cert)
udata = (struct cert_userdata *) lua_newuserdata(L, sizeof(*udata));
udata->cert = cert;
lua_newtable(L);
#define NSE_NUM_CERT_FIELDS 7
lua_createtable(L, 0, NSE_NUM_CERT_FIELDS);
subject = X509_get_subject_name(cert);
if (subject != NULL) {
@@ -633,7 +637,8 @@ static int parse_ssl_cert(lua_State *L, X509 *cert)
lua_pushfstring(L, "Error parsing cert: %s", ERR_error_string(ERR_get_error(), NULL));
return 2;
}
lua_newtable(L);
#define NSE_NUM_PKEY_FIELDS 4
lua_createtable(L, 0, NSE_NUM_PKEY_FIELDS);
#if HAVE_OPAQUE_STRUCTS
pkey_type = EVP_PKEY_base_id(pubkey);
#else