Annotation of embedaddon/iftop/serv_hash.c, revision 1.1.1.1
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>