/*
* Lookup the first matching entry in the hostfile, either by address or by
* name. Split the matching line into tokens in the "token" array and return
* the number of tokens.
*/
static int
hostent_file_match(FILE *f, int type, int family, int len, const char *data,
char *addr, char **tokens, int ntokens)
{
int n, i;
for(;;) {
n = asr_parse_namedb_line(f, tokens, MAXTOKEN);
if (n == -1)
return (-1);
if (type == ASR_GETHOSTBYNAME) {
for (i = 1; i < n; i++) {
if (strcasecmp(data, tokens[i]))
continue;
if (inet_pton(family, tokens[0], addr) == 1)
return (n);
}
continue;
}
if (inet_pton(family, tokens[0], addr) == 1)
if (memcmp(addr, data, len) == 0)
return (n);
}
}
/*
* Lookup the first matching entry in the hostfile, either by address or by
* name depending on reqtype, and build a hostent from the line.
*/
static struct hostent_ext *
hostent_file_match(FILE *f, int reqtype, int family, const char *data,
int datalen)
{
char *tokens[MAXTOKEN], addr[16];
struct hostent_ext *h;
int n, i;
for (;;) {
n = asr_parse_namedb_line(f, tokens, MAXTOKEN);
if (n == -1) {
errno = 0; /* ignore errors reading the file */
return (NULL);
}
if (reqtype == ASR_GETHOSTBYNAME) {
for (i = 1; i < n; i++) {
if (strcasecmp(data, tokens[i]))
continue;
if (inet_pton(family, tokens[0], addr) == 1)
goto found;
}
} else {
if (inet_pton(family, tokens[0], addr) == 1 &&
memcmp(addr, data, datalen) == 0)
goto found;
}
}
found:
if ((h = hostent_alloc(family)) == NULL)
return (NULL);
if (hostent_set_cname(h, tokens[1], 0) == -1)
goto fail;
for (i = 2; i < n; i ++)
if (hostent_add_alias(h, tokens[i], 0) == -1)
goto fail;
if (hostent_add_addr(h, addr, h->h.h_length) == -1)
goto fail;
return (h);
fail:
free(h);
return (NULL);
}
static int
addrinfo_from_file(struct asr_query *as, int family, FILE *f)
{
char *tokens[MAXTOKEN], *c, buf[BUFSIZ + 1];
int n, i;
union {
struct sockaddr sa;
struct sockaddr_in sain;
struct sockaddr_in6 sain6;
} u;
for (;;) {
n = asr_parse_namedb_line(f, tokens, MAXTOKEN, buf, sizeof(buf));
if (n == -1)
break; /* ignore errors reading the file */
for (i = 1; i < n; i++) {
if (strcasecmp(as->as.ai.hostname, tokens[i]))
continue;
if (asr_sockaddr_from_str(&u.sa, family, tokens[0]) == -1)
continue;
break;
}
if (i == n)
continue;
if (as->as.ai.hints.ai_flags & (AI_CANONNAME | AI_FQDN))
c = tokens[1];
else
c = NULL;
if (addrinfo_add(as, &u.sa, c))
return (-1); /* errno set */
}
return (0);
}
