/* hash table */
#include <stdio.h>
#include <stdlib.h>
#include <netdb.h>
#include "serv_hash.h"
#include "hash.h"
#include "iftop.h"
// Deliberately not a power of 2 or 10
#define hash_table_size 123
int serv_hash_compare(void* a, void* b) {
ip_service* aa = (ip_service*)a;
ip_service* bb = (ip_service*)b;
return (aa->port == bb->port &&
aa->protocol == bb->protocol);
}
int serv_hash_hash(void* key) {
ip_service* serv = (ip_service*)key;
return serv->protocol % hash_table_size;
}
void* serv_hash_copy_key(void* orig) {
ip_service* copy;
copy = xmalloc(sizeof *copy);
*copy = *(ip_service*)orig;
return copy;
}
void serv_hash_delete_key(void* key) {
free(key);
}
/*
* Allocate and return a hash
*/
hash_type* serv_hash_create() {
hash_type* hash_table;
hash_table = xcalloc(hash_table_size, sizeof *hash_table);
hash_table->size = hash_table_size;
hash_table->compare = &serv_hash_compare;
hash_table->hash = &serv_hash_hash;
hash_table->delete_key = &serv_hash_delete_key;
hash_table->copy_key = &serv_hash_copy_key;
hash_initialise(hash_table);
return hash_table;
}
void serv_hash_initialise(hash_type* sh) {
struct servent* ent;
struct protoent* pent;
ip_service* service;
setprotoent(1);
while((ent = getservent()) != NULL) {
pent = getprotobyname(ent->s_proto);
if(pent != NULL) {
service = xmalloc(sizeof(ip_service));
service->port = ntohs(ent->s_port);
service->protocol = pent->p_proto;
hash_insert(sh, service, xstrdup(ent->s_name));
}
}
endprotoent();
}
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>