Annotation of embedaddon/iftop/serv_hash.c, revision 1.1
1.1 ! misho 1: /* hash table */
! 2:
! 3: #include <stdio.h>
! 4: #include <stdlib.h>
! 5: #include <netdb.h>
! 6: #include "serv_hash.h"
! 7: #include "hash.h"
! 8: #include "iftop.h"
! 9:
! 10: // Deliberately not a power of 2 or 10
! 11: #define hash_table_size 123
! 12:
! 13: int serv_hash_compare(void* a, void* b) {
! 14: ip_service* aa = (ip_service*)a;
! 15: ip_service* bb = (ip_service*)b;
! 16: return (aa->port == bb->port &&
! 17: aa->protocol == bb->protocol);
! 18: }
! 19:
! 20: int serv_hash_hash(void* key) {
! 21: ip_service* serv = (ip_service*)key;
! 22: return serv->protocol % hash_table_size;
! 23: }
! 24:
! 25: void* serv_hash_copy_key(void* orig) {
! 26: ip_service* copy;
! 27: copy = xmalloc(sizeof *copy);
! 28: *copy = *(ip_service*)orig;
! 29: return copy;
! 30: }
! 31:
! 32: void serv_hash_delete_key(void* key) {
! 33: free(key);
! 34: }
! 35:
! 36: /*
! 37: * Allocate and return a hash
! 38: */
! 39: hash_type* serv_hash_create() {
! 40: hash_type* hash_table;
! 41: hash_table = xcalloc(hash_table_size, sizeof *hash_table);
! 42: hash_table->size = hash_table_size;
! 43: hash_table->compare = &serv_hash_compare;
! 44: hash_table->hash = &serv_hash_hash;
! 45: hash_table->delete_key = &serv_hash_delete_key;
! 46: hash_table->copy_key = &serv_hash_copy_key;
! 47: hash_initialise(hash_table);
! 48: return hash_table;
! 49: }
! 50:
! 51: void serv_hash_initialise(hash_type* sh) {
! 52: struct servent* ent;
! 53: struct protoent* pent;
! 54: ip_service* service;
! 55: setprotoent(1);
! 56: while((ent = getservent()) != NULL) {
! 57: pent = getprotobyname(ent->s_proto);
! 58: if(pent != NULL) {
! 59: service = xmalloc(sizeof(ip_service));
! 60: service->port = ntohs(ent->s_port);
! 61: service->protocol = pent->p_proto;
! 62: hash_insert(sh, service, xstrdup(ent->s_name));
! 63: }
! 64: }
! 65: endprotoent();
! 66: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>