static void
try_dscp_v6(void) {
#ifdef ISC_PLATFORM_HAVEIPV6
#ifdef WANT_IPV6
#ifdef IPV6_TCLASS
char strbuf[ISC_STRERRORSIZE];
struct addrinfo hints, *res0;
int s, dscp = 0, n;
#if defined(IPV6_RECVTCLASS)
int on = 1;
#endif /* IPV6_RECVTCLASS */
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_protocol = IPPROTO_UDP;
#ifdef AI_NUMERICHOST
hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
#else
hints.ai_flags = AI_PASSIVE;
#endif
n = getaddrinfo("::1", NULL, &hints, &res0);
if (n != 0 || res0 == NULL) {
isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
ISC_LOGMODULE_SOCKET, ISC_LOG_DEBUG(10),
"getaddrinfo(::1): %s", gai_strerror(n));
return;
}
s = socket(res0->ai_family, res0->ai_socktype, res0->ai_protocol);
if (s == -1) {
isc__strerror(errno, strbuf, sizeof(strbuf));
isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
ISC_LOGMODULE_SOCKET, ISC_LOG_DEBUG(10),
"socket: %s", strbuf);
freeaddrinfo(res0);
return;
}
if (setsockopt(s, IPPROTO_IPV6, IPV6_TCLASS, &dscp, sizeof(dscp)) == 0)
dscp_result |= ISC_NET_DSCPSETV6;
#ifdef IPV6_RECVTCLASS
on = 1;
if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVTCLASS, &on, sizeof(on)) == 0)
dscp_result |= ISC_NET_DSCPRECVV6;
#endif /* IPV6_RECVTCLASS */
#ifdef ISC_NET_BSD44MSGHDR
if (cmsgsend(s, IPPROTO_IPV6, IPV6_TCLASS, res0))
dscp_result |= ISC_NET_DSCPPKTV6;
#endif /* ISC_NET_BSD44MSGHDR */
freeaddrinfo(res0);
close(s);
#endif /* IPV6_TCLASS */
#endif /* WANT_IPV6 */
#endif /* ISC_PLATFORM_HAVEIPV6 */
}
static void
try_dscp_v4(void) {
#ifdef IP_TOS
char strbuf[ISC_STRERRORSIZE];
struct addrinfo hints, *res0;
int s, dscp = 0, n;
#ifdef IP_RECVTOS
int on = 1;
#endif /* IP_RECVTOS */
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_protocol = IPPROTO_UDP;
#ifdef AI_NUMERICHOST
hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
#else
hints.ai_flags = AI_PASSIVE;
#endif
n = getaddrinfo("127.0.0.1", NULL, &hints, &res0);
if (n != 0 || res0 == NULL) {
isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
ISC_LOGMODULE_SOCKET, ISC_LOG_DEBUG(10),
"getaddrinfo(127.0.0.1): %s", gai_strerror(n));
return;
}
s = socket(res0->ai_family, res0->ai_socktype, res0->ai_protocol);
if (s == -1) {
isc__strerror(errno, strbuf, sizeof(strbuf));
isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
ISC_LOGMODULE_SOCKET, ISC_LOG_DEBUG(10),
"socket: %s", strbuf);
freeaddrinfo(res0);
return;
}
if (setsockopt(s, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) == 0)
dscp_result |= ISC_NET_DSCPSETV4;
#ifdef IP_RECVTOS
on = 1;
if (setsockopt(s, IPPROTO_IP, IP_RECVTOS, &on, sizeof(on)) == 0)
dscp_result |= ISC_NET_DSCPRECVV4;
#endif /* IP_RECVTOS */
#ifdef ISC_NET_BSD44MSGHDR
#ifndef ISC_CMSG_IP_TOS
#ifdef __APPLE__
#define ISC_CMSG_IP_TOS 0 /* As of 10.8.2. */
#else /* ! __APPLE__ */
#define ISC_CMSG_IP_TOS 1
#endif /* ! __APPLE__ */
#endif /* ! ISC_CMSG_IP_TOS */
#if ISC_CMSG_IP_TOS
if (cmsgsend(s, IPPROTO_IP, IP_TOS, res0))
dscp_result |= ISC_NET_DSCPPKTV4;
#endif /* ISC_CMSG_IP_TOS */
#endif /* ISC_NET_BSD44MSGHDR */
freeaddrinfo(res0);
close(s);
#endif /* IP_TOS */
}
