struct hostent *
netsnmp_gethostbyname(const char *name)
{
#if HAVE_GETHOSTBYNAME
#ifdef DNSSEC_LOCAL_VALIDATION
val_status_t val_status;
#endif
struct hostent *hp = NULL;
if (NULL == name)
return NULL;
DEBUGMSGTL(("dns:gethostbyname", "looking up %s\n", name));
#ifdef DNSSEC_LOCAL_VALIDATION
hp = val_gethostbyname(netsnmp_validator_context(), name, &val_status);
DEBUGMSGTL(("dns:sec:val", "val_status %d / %s; trusted: %d\n",
val_status, p_val_status(val_status),
val_istrusted(val_status)));
if (!val_istrusted(val_status)) {
snmp_log(LOG_WARNING,
"The authenticity of DNS response is not trusted (%s)\n",
p_val_status(val_status));
/** continue anyways if DNSSEC_WARN_ONLY is set */
if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_DNSSEC_WARN_ONLY))
hp = NULL;
}
else if (val_does_not_exist(val_status) && hp)
hp = NULL;
#else
hp = gethostbyname(name);
#endif
if (hp == NULL) {
DEBUGMSGTL(("dns:gethostbyname",
"couldn't resolve %s\n", name));
} else if (hp->h_addrtype != AF_INET) {
DEBUGMSGTL(("dns:gethostbyname",
"warning: response for %s not AF_INET!\n", name));
} else {
DEBUGMSGTL(("dns:gethostbyname",
"%s resolved okay\n", name));
}
return hp;
#else
NETSNMP_LOGONCE((LOG_ERR, "gethostbyname not available"));
return NULL;
#endif /* HAVE_GETHOSTBYNAME */
}
struct hostent *
dnssec_gethostbyname(const char *name) {
val_status_t val_status;
struct hostent * res;
if (dnssec_init_context())
return NULL;
LOG(L_INFO, " gethostbyname(%s) called: wrapper\n", name);
res = val_gethostbyname(libval_ctx, name, &val_status);
if (val_istrusted(val_status) && !val_does_not_exist(val_status)) {
return res;
}
return NULL;
}
int
AddrStrToAddr(const char * const s, struct sockaddr_in * const sa, const int defaultport)
{
char portstr[128];
unsigned int ipnum;
unsigned int port;
struct hostent *hp;
char *hostcp, *atsign, *colon, *cp, *p2;
memset(sa, 0, sizeof(struct sockaddr_in));
strncpy(portstr, s, sizeof(portstr));
portstr[sizeof(portstr) - 1] = '\0';
if ((colon = strchr(portstr, ':')) != NULL)
{
/* Does it look like a URL? http://host ? */
if ((colon[1] == '/') && (colon[2] == '/'))
{
*colon = '\0';
port = 0;
hostcp = colon + 3;
for (cp = hostcp; *cp != '\0'; cp++)
{
if ((!ISALNUM(*cp)) && (*cp != '.'))
{
/* http://host:port */
if ((*cp == ':') && (isdigit((int) cp[1])))
{
*cp++ = '\0';
p2 = cp;
while (isdigit((int) *cp))
cp++;
*cp = '\0';
port = atoi(p2);
}
*cp = '\0';
break;
}
}
if (port == 0)
port = ServiceNameToPortNumber(portstr, 0);
}
else
{
/* Look for host.name.domain:port */
*colon = '\0';
hostcp = portstr;
port = (unsigned int) atoi(colon + 1);
}
}
else if ((atsign = strchr(portstr, '@')) != NULL)
{
/* Look for [email protected] */
*atsign = '\0';
hostcp = atsign + 1;
port = (unsigned int) atoi(portstr);
}
else if (defaultport > 0)
{
/* Have just host.name.domain, use that w/ default port. */
port = (unsigned int) defaultport;
hostcp = portstr;
}
else
{
/* If defaultport <= 0, they must supply a port number
* in the host/port string.
*/
errno = EADDRNOTAVAIL;
return (kAddrStrToAddrMiscErr);
}
sa->sin_port = htons((short) port);
ipnum = inet_addr(hostcp);
if (ipnum != INADDR_NONE)
{
sa->sin_family = AF_INET;
sa->sin_addr.s_addr = ipnum;
}
else
{
#ifdef DNSSEC_LOCAL_VALIDATION
val_status_t val_status;
errno = 0;
hp = val_gethostbyname(NULL,hostcp,&val_status);
if ((hp != NULL) && (!val_istrusted(val_status)))
hp = NULL;
#else
errno = 0;
hp = gethostbyname(hostcp);
#endif
if (hp == NULL)
{
if (errno == 0)
errno = ENOENT;
return (kAddrStrToAddrBadHost);
}
sa->sin_family = hp->h_addrtype;
memcpy(&sa->sin_addr.s_addr, hp->h_addr_list[0],
(size_t) hp->h_length);
}
return (0);
} /* AddrStrToAddr */
