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Fixed a bug in nmap_dns.cc where the endian of the platform that nmap ran on

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might negitivly effect how efficiently nmap stores cache values in a hash 
table. Now ntohl is called to correctly reorder the values on little endian 
platforms before the hash calculation is preformed.
This commit is contained in:
michael
2008-05-15 22:41:49 +00:00
parent 0708d3144d
commit 47e4b7aee5
1 changed files with 5 additions and 3 deletions
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8
nmap_dns.cc
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@@ -240,6 +240,8 @@ static int read_timeouts[][4] = {
// Size of hash table used to hold the hosts from /etc/hosts
#define HASH_TABLE_SIZE 256
// Hash macro for etchosts
#define IP_HASH(x) (ntohl(x)%HASH_TABLE_SIZE)
//------------------- Internal Structures ---------------------
@@ -1047,7 +1049,7 @@ static void addto_etchosts(u32 ip, const char *hname) {
he->name = strdup(hname);
he->addr = ip;
he->cache_hits = 0;
etchosts[ip % HASH_TABLE_SIZE].push_back(he);
etchosts[IP_HASH(ip)].push_back(he);
total_size++;
}
@@ -1056,8 +1058,8 @@ static void addto_etchosts(u32 ip, const char *hname) {
static char *lookup_etchosts(u32 ip) {
std::list<host_elem *>::iterator hostI;
host_elem *tpelem;
for(hostI = etchosts[ip % HASH_TABLE_SIZE].begin(); hostI != etchosts[ip % HASH_TABLE_SIZE].end(); hostI++) {
int localIP_Hash = IP_HASH(ip);
for(hostI = etchosts[localIP_Hash].begin(); hostI != etchosts[localIP_Hash].end(); hostI++) {
tpelem = *hostI;
if (tpelem->addr == ip) {
if(tpelem->cache_hits < UCHAR_MAX)