3 #include <sys/socket.h>
6 #include <netinet/in.h>
11 int gethostbyname2_r(const char *name, int af,
12 struct hostent *h, char *buf, size_t buflen,
13 struct hostent **res, int *err)
15 struct address addrs[MAXADDRS];
21 cnt = __lookup_name(addrs, canon, name, af, AI_CANONNAME);
22 if (cnt<0) switch (cnt) {
24 *err = HOST_NOT_FOUND;
39 h->h_length = af==AF_INET6 ? 16 : 4;
42 align = -(uintptr_t)buf & sizeof(char *)-1;
44 need = 4*sizeof(char *);
45 need += (cnt + 1) * (sizeof(char *) + h->h_length);
46 need += strlen(name)+1;
47 need += strlen(canon)+1;
50 if (need > buflen) return ERANGE;
53 h->h_aliases = (void *)buf;
54 buf += 3*sizeof(char *);
55 h->h_addr_list = (void *)buf;
56 buf += (cnt+1)*sizeof(char *);
58 for (i=0; i<cnt; i++) {
59 h->h_addr_list[i] = (void *)buf;
61 memcpy(h->h_addr_list[i], addrs[i].addr, h->h_length);
63 h->h_addr_list[i] = 0;
65 h->h_name = h->h_aliases[0] = buf;
66 strcpy(h->h_name, canon);
67 buf += strlen(h->h_name)+1;
69 if (strcmp(h->h_name, name)) {
70 h->h_aliases[1] = buf;
71 strcpy(h->h_aliases[1], name);
72 buf += strlen(h->h_aliases[1])+1;
73 } else h->h_aliases[1] = 0;