isc_result_t
isc_net_getudpportrange(int af, in_port_t *low, in_port_t *high) {
int result = ISC_R_FAILURE;
REQUIRE(low != NULL && high != NULL);
#if defined(USE_SYSCTL_PORTRANGE)
result = getudpportrange_sysctl(af, low, high);
#else
UNUSED(af);
#endif
if (result != ISC_R_SUCCESS) {
*low = ISC_NET_PORTRANGELOW;
*high = ISC_NET_PORTRANGEHIGH;
}
return (ISC_R_SUCCESS); /* we currently never fail in this function */
}
isc_result_t
isc_net_getudpportrange(int af, in_port_t *low, in_port_t *high) {
int result = ISC_R_FAILURE;
#if !defined(USE_SYSCTL_PORTRANGE) && defined(__linux)
FILE *fp;
#endif
REQUIRE(low != NULL && high != NULL);
#if defined(USE_SYSCTL_PORTRANGE)
result = getudpportrange_sysctl(af, low, high);
#elif defined(__linux)
UNUSED(af);
/*
* Linux local ports are address family agnostic.
*/
fp = fopen("/proc/sys/net/ipv4/ip_local_port_range", "r");
if (fp != NULL) {
int n;
unsigned int l, h;
n = fscanf(fp, "%u %u", &l, &h);
if (n == 2 && (l & ~0xffff) == 0 && (h & ~0xffff) == 0) {
*low = l;
*high = h;
result = ISC_R_SUCCESS;
}
fclose(fp);
}
#else
UNUSED(af);
#endif
if (result != ISC_R_SUCCESS) {
*low = ISC_NET_PORTRANGELOW;
*high = ISC_NET_PORTRANGEHIGH;
}
return (ISC_R_SUCCESS); /* we currently never fail in this function */
}
