#include <config.h>

#include <sys/types.h>

#if defined(HAVE_SYS_SYSCTL_H)

#if defined(HAVE_SYS_PARAM_H)

#include <sys/param.h>

#endif

#include <sys/sysctl.h>

#endif

#include <sys/uio.h>

#include <errno.h>

#include <unistd.h>

#include <fcntl.h>

#include <isc/log.h>

#include <isc/msgs.h>

#include <isc/net.h>

#include <isc/netdb.h>

#include <isc/once.h>

#include <isc/strerror.h>

#include <isc/string.h>

#include <isc/util.h>

#ifndef ISC_SOCKADDR_LEN_T

#define ISC_SOCKADDR_LEN_T unsigned int

#endif

#ifndef ISC_NET_PORTRANGELOW

#define ISC_NET_PORTRANGELOW 1024

#endif /* ISC_NET_PORTRANGELOW */

#ifndef ISC_NET_PORTRANGEHIGH

#define ISC_NET_PORTRANGEHIGH 65535

#endif /* ISC_NET_PORTRANGEHIGH */

#ifdef HAVE_SYSCTLBYNAME

#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)

#define USE_SYSCTL_PORTRANGE

#define SYSCTL_V4PORTRANGE_LOW "net.inet.ip.portrange.hifirst"

#define SYSCTL_V4PORTRANGE_HIGH "net.inet.ip.portrange.hilast"

#define SYSCTL_V6PORTRANGE_LOW "net.inet.ip.portrange.hifirst"

#define SYSCTL_V6PORTRANGE_HIGH "net.inet.ip.portrange.hilast"

#endif

#ifdef __NetBSD__

#define USE_SYSCTL_PORTRANGE

#define SYSCTL_V4PORTRANGE_LOW "net.inet.ip.anonportmin"

#define SYSCTL_V4PORTRANGE_HIGH "net.inet.ip.anonportmax"

#define SYSCTL_V6PORTRANGE_LOW "net.inet6.ip6.anonportmin"

#define SYSCTL_V6PORTRANGE_HIGH "net.inet6.ip6.anonportmax"

#endif

#else /* !HAVE_SYSCTLBYNAME */

#ifdef __OpenBSD__

#define USE_SYSCTL_PORTRANGE

#define SYSCTL_V4PORTRANGE_LOW { CTL_NET, PF_INET, IPPROTO_IP, \

IPCTL_IPPORT_HIFIRSTAUTO }

#define SYSCTL_V4PORTRANGE_HIGH { CTL_NET, PF_INET, IPPROTO_IP, \

IPCTL_IPPORT_HILASTAUTO }

#define SYSCTL_V6PORTRANGE_LOW SYSCTL_V4PORTRANGE_LOW

#define SYSCTL_V6PORTRANGE_HIGH SYSCTL_V4PORTRANGE_HIGH

#endif

#endif /* HAVE_SYSCTLBYNAME */

#if defined(ISC_PLATFORM_HAVEIPV6)

# if defined(ISC_PLATFORM_NEEDIN6ADDRANY)

const struct in6_addr isc_net_in6addrany = IN6ADDR_ANY_INIT;

# endif

# if defined(ISC_PLATFORM_NEEDIN6ADDRLOOPBACK)

const struct in6_addr isc_net_in6addrloop = IN6ADDR_LOOPBACK_INIT;

# endif

# if defined(WANT_IPV6)

static isc_once_t once_ipv6only = ISC_ONCE_INIT;

# if defined(ISC_PLATFORM_HAVEIN6PKTINFO)

static isc_once_t once_ipv6pktinfo = ISC_ONCE_INIT;

# endif

# endif /* WANT_IPV6 */

#endif /* ISC_PLATFORM_HAVEIPV6 */

#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 */

static isc_once_t once = ISC_ONCE_INIT;

static isc_once_t once_dscp = ISC_ONCE_INIT;

static isc_result_t ipv4_result = ISC_R_NOTFOUND;

static isc_result_t ipv6_result = ISC_R_NOTFOUND;

static isc_result_t unix_result = ISC_R_NOTFOUND;

static isc_result_t ipv6only_result = ISC_R_NOTFOUND;

static isc_result_t ipv6pktinfo_result = ISC_R_NOTFOUND;

static unsigned int dscp_result = 0;

static isc_result_t

try_proto(int domain) {

int s;

isc_result_t result = ISC_R_SUCCESS;

char strbuf[ISC_STRERRORSIZE];

s = socket(domain, SOCK_STREAM, 0);

if (s == -1) {

switch (errno) {

#ifdef EAFNOSUPPORT

case EAFNOSUPPORT:

#endif

#ifdef EPROTONOSUPPORT

case EPROTONOSUPPORT:

#endif

#ifdef EINVAL

case EINVAL:

#endif

return (ISC_R_NOTFOUND);

default:

isc__strerror(errno, strbuf, sizeof(strbuf));

UNEXPECTED_ERROR(__FILE__, __LINE__,

"socket() %s: %s",

isc_msgcat_get(isc_msgcat,

ISC_MSGSET_GENERAL,

ISC_MSG_FAILED,

"failed"),

strbuf);

return (ISC_R_UNEXPECTED);

}

}

#ifdef ISC_PLATFORM_HAVEIPV6

#ifdef WANT_IPV6

#ifdef ISC_PLATFORM_HAVEIN6PKTINFO

if (domain == PF_INET6) {

struct sockaddr_in6 sin6;

unsigned int len;

/*

len = sizeof(sin6);

if (getsockname(s, (struct sockaddr *)&sin6, (void *)&len) < 0)

{

isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,

ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,

"retrieving the address of an IPv6 "

"socket from the kernel failed.");

isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,

ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,

"IPv6 is not supported.");

result = ISC_R_NOTFOUND;

} else {

if (len == sizeof(struct sockaddr_in6))

result = ISC_R_SUCCESS;

else {

isc_log_write(isc_lctx,

ISC_LOGCATEGORY_GENERAL,

ISC_LOGMODULE_SOCKET,

ISC_LOG_ERROR,

"IPv6 structures in kernel and "

"user space do not match.");

isc_log_write(isc_lctx,

ISC_LOGCATEGORY_GENERAL,

ISC_LOGMODULE_SOCKET,

ISC_LOG_ERROR,

"IPv6 is not supported.");

result = ISC_R_NOTFOUND;

}

}

}

#endif

#endif

#endif

(void)close(s);

return (result);

}

static void

initialize_action(void) {

ipv4_result = try_proto(PF_INET);

#ifdef ISC_PLATFORM_HAVEIPV6

#ifdef WANT_IPV6

#ifdef ISC_PLATFORM_HAVEIN6PKTINFO

ipv6_result = try_proto(PF_INET6);

#endif

#endif

#endif

#ifdef ISC_PLATFORM_HAVESYSUNH

unix_result = try_proto(PF_UNIX);

#endif

}

static void

initialize(void) {

RUNTIME_CHECK(isc_once_do(&once, initialize_action) == ISC_R_SUCCESS);

}

isc_net_probeipv4(void) {

initialize();

return (ipv4_result);

}

isc_net_probeipv6(void) {

initialize();

return (ipv6_result);

}

isc_net_probeunix(void) {

initialize();

return (unix_result);

}

#ifdef ISC_PLATFORM_HAVEIPV6

#ifdef WANT_IPV6

static void

try_ipv6only(void) {

#ifdef IPV6_V6ONLY

int s, on;

char strbuf[ISC_STRERRORSIZE];

#endif

isc_result_t result;

result = isc_net_probeipv6();

if (result != ISC_R_SUCCESS) {

ipv6only_result = result;

return;

}

#ifndef IPV6_V6ONLY

ipv6only_result = ISC_R_NOTFOUND;

return;

#else

/* check for TCP sockets */

s = socket(PF_INET6, SOCK_STREAM, 0);

if (s == -1) {

isc__strerror(errno, strbuf, sizeof(strbuf));

UNEXPECTED_ERROR(__FILE__, __LINE__,

"socket() %s: %s",

isc_msgcat_get(isc_msgcat,

ISC_MSGSET_GENERAL,

ISC_MSG_FAILED,

"failed"),

strbuf);

ipv6only_result = ISC_R_UNEXPECTED;

return;

}

on = 1;

if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)) < 0) {

ipv6only_result = ISC_R_NOTFOUND;

goto close;

}

close(s);

/* check for UDP sockets */

s = socket(PF_INET6, SOCK_DGRAM, 0);

if (s == -1) {

isc__strerror(errno, strbuf, sizeof(strbuf));

UNEXPECTED_ERROR(__FILE__, __LINE__,

"socket() %s: %s",

isc_msgcat_get(isc_msgcat,

ISC_MSGSET_GENERAL,

ISC_MSG_FAILED,

"failed"),

strbuf);

ipv6only_result = ISC_R_UNEXPECTED;

return;

}

on = 1;

if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)) < 0) {

ipv6only_result = ISC_R_NOTFOUND;

goto close;

}

ipv6only_result = ISC_R_SUCCESS;

close:

close(s);

return;

#endif /* IPV6_V6ONLY */

}

static void

initialize_ipv6only(void) {

RUNTIME_CHECK(isc_once_do(&once_ipv6only,

try_ipv6only) == ISC_R_SUCCESS);

}

#endif /* WANT_IPV6 */

#ifdef ISC_PLATFORM_HAVEIN6PKTINFO

#ifdef WANT_IPV6

static void

try_ipv6pktinfo(void) {

int s, on;

char strbuf[ISC_STRERRORSIZE];

isc_result_t result;

int optname;

result = isc_net_probeipv6();

if (result != ISC_R_SUCCESS) {

ipv6pktinfo_result = result;

return;

}

/* we only use this for UDP sockets */

s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP);

if (s == -1) {

isc__strerror(errno, strbuf, sizeof(strbuf));

UNEXPECTED_ERROR(__FILE__, __LINE__,

"socket() %s: %s",

isc_msgcat_get(isc_msgcat,

ISC_MSGSET_GENERAL,

ISC_MSG_FAILED,

"failed"),

strbuf);

ipv6pktinfo_result = ISC_R_UNEXPECTED;

return;

}

#ifdef IPV6_RECVPKTINFO

optname = IPV6_RECVPKTINFO;

#else

optname = IPV6_PKTINFO;

#endif

on = 1;

if (setsockopt(s, IPPROTO_IPV6, optname, &on, sizeof(on)) < 0) {

ipv6pktinfo_result = ISC_R_NOTFOUND;

goto close;

}

ipv6pktinfo_result = ISC_R_SUCCESS;

close:

close(s);

return;

}

static void

initialize_ipv6pktinfo(void) {

RUNTIME_CHECK(isc_once_do(&once_ipv6pktinfo,

try_ipv6pktinfo) == ISC_R_SUCCESS);

}

#endif /* WANT_IPV6 */

#endif /* ISC_PLATFORM_HAVEIN6PKTINFO */

#endif /* ISC_PLATFORM_HAVEIPV6 */

isc_net_probe_ipv6only(void) {

#ifdef ISC_PLATFORM_HAVEIPV6

#ifdef WANT_IPV6

initialize_ipv6only();

#else

ipv6only_result = ISC_R_NOTFOUND;

#endif

#endif

return (ipv6only_result);

}

isc_net_probe_ipv6pktinfo(void) {

#ifdef ISC_PLATFORM_HAVEIPV6

#ifdef ISC_PLATFORM_HAVEIN6PKTINFO

#ifdef WANT_IPV6

initialize_ipv6pktinfo();

#else

ipv6pktinfo_result = ISC_R_NOTFOUND;

#endif

#endif

#endif

return (ipv6pktinfo_result);

}

#if ISC_CMSG_IP_TOS || \

defined(ISC_NET_BSD44MSGHDR) && defined(IPV6_TCLASS) && defined(WANT_IPV6)

static inline ISC_SOCKADDR_LEN_T

cmsg_len(ISC_SOCKADDR_LEN_T len) {

#ifdef CMSG_LEN

return (CMSG_LEN(len));

#else

ISC_SOCKADDR_LEN_T hdrlen;

/*

hdrlen = (ISC_SOCKADDR_LEN_T)CMSG_DATA(((struct cmsghdr *)NULL));

return (hdrlen + len);

#endif

}

static inline ISC_SOCKADDR_LEN_T

cmsg_space(ISC_SOCKADDR_LEN_T len) {

#ifdef CMSG_SPACE

return (CMSG_SPACE(len));

#else

struct msghdr msg;

struct cmsghdr *cmsgp;

/*

char dummybuf[sizeof(struct cmsghdr) + 1024];

memset(&msg, 0, sizeof(msg));

msg.msg_control = dummybuf;

msg.msg_controllen = sizeof(dummybuf);

cmsgp = (struct cmsghdr *)dummybuf;

cmsgp->cmsg_len = cmsg_len(len);

cmsgp = CMSG_NXTHDR(&msg, cmsgp);

if (cmsgp != NULL)

return ((char *)cmsgp - (char *)msg.msg_control);

else

return (0);

#endif

}

#ifdef ISC_NET_BSD44MSGHDR

static isc_result_t

make_nonblock(int fd) {

int ret;

int flags;

char strbuf[ISC_STRERRORSIZE];

#ifdef USE_FIONBIO_IOCTL

int on = 1;

ret = ioctl(fd, FIONBIO, (char *)&on);

#else

flags = fcntl(fd, F_GETFL, 0);

flags |= PORT_NONBLOCK;

ret = fcntl(fd, F_SETFL, flags);

#endif

if (ret == -1) {

isc__strerror(errno, strbuf, sizeof(strbuf));

UNEXPECTED_ERROR(__FILE__, __LINE__,

#ifdef USE_FIONBIO_IOCTL

"ioctl(%d, FIONBIO, &on): %s", fd,

#else

"fcntl(%d, F_SETFL, %d): %s", fd, flags,

#endif

strbuf);

return (ISC_R_UNEXPECTED);

}

return (ISC_R_SUCCESS);

}

static isc_boolean_t

cmsgsend(int s, int level, int type, struct addrinfo *res) {

char strbuf[ISC_STRERRORSIZE];

struct sockaddr_storage ss;

ISC_SOCKADDR_LEN_T len = sizeof(ss);

struct msghdr msg;

union {

struct cmsghdr h;

unsigned char b[256];

} control;

struct cmsghdr *cmsgp;

int dscp = 46;

struct iovec iovec;

char buf[1] = { 0 };

isc_result_t result;

if (bind(s, res->ai_addr, res->ai_addrlen) < 0) {

isc__strerror(errno, strbuf, sizeof(strbuf));

isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,

ISC_LOGMODULE_SOCKET, ISC_LOG_DEBUG(10),

"bind: %s", strbuf);

return (ISC_FALSE);

}

if (getsockname(s, (struct sockaddr *)&ss, &len) < 0) {

isc__strerror(errno, strbuf, sizeof(strbuf));

isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,

ISC_LOGMODULE_SOCKET, ISC_LOG_DEBUG(10),

"getsockname: %s", strbuf);

return (ISC_FALSE);

}

iovec.iov_base = buf;

iovec.iov_len = sizeof(buf);

memset(&msg, 0, sizeof(msg));

msg.msg_name = (struct sockaddr *)&ss;

msg.msg_namelen = len;

msg.msg_iov = &iovec;

msg.msg_iovlen = 1;

msg.msg_control = (void*)&control;

msg.msg_controllen = 0;

msg.msg_flags = 0;

cmsgp = msg.msg_control;

switch (type) {

#ifdef IP_TOS

case IP_TOS:

memset(cmsgp, 0, cmsg_space(sizeof(char)));

cmsgp->cmsg_level = level;

cmsgp->cmsg_type = type;

cmsgp->cmsg_len = cmsg_len(sizeof(char));

*(unsigned char*)CMSG_DATA(cmsgp) = dscp;

msg.msg_controllen += cmsg_space(sizeof(char));

break;

#endif

#ifdef IPV6_TCLASS

case IPV6_TCLASS:

memset(cmsgp, 0, cmsg_space(sizeof(dscp)));

cmsgp->cmsg_level = level;

cmsgp->cmsg_type = type;

cmsgp->cmsg_len = cmsg_len(sizeof(dscp));

memmove(CMSG_DATA(cmsgp), &dscp, sizeof(dscp));

msg.msg_controllen += cmsg_space(sizeof(dscp));

break;

#endif

default:

INSIST(0);

}

if (sendmsg(s, &msg, 0) < 0) {

int debug = ISC_LOG_DEBUG(10);

switch (errno) {

#ifdef ENOPROTOOPT

case ENOPROTOOPT:

#endif

#ifdef EOPNOTSUPP

case EOPNOTSUPP:

#endif

case EINVAL:

break;

default:

debug = ISC_LOG_NOTICE;

}

isc__strerror(errno, strbuf, sizeof(strbuf));

if (debug != ISC_LOG_NOTICE) {

isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,

ISC_LOGMODULE_SOCKET, ISC_LOG_DEBUG(10),

"sendmsg: %s", strbuf);

} else {

UNEXPECTED_ERROR(__FILE__, __LINE__,

"sendmsg() %s: %s",

isc_msgcat_get(isc_msgcat,

ISC_MSGSET_GENERAL,

ISC_MSG_FAILED,

"failed"),

strbuf);

}

return (ISC_FALSE);

}

/*

result = make_nonblock(s);

RUNTIME_CHECK(result == ISC_R_SUCCESS);

iovec.iov_base = buf;

iovec.iov_len = sizeof(buf);

memset(&msg, 0, sizeof(msg));

msg.msg_name = (struct sockaddr *)&ss;

msg.msg_namelen = sizeof(ss);

msg.msg_iov = &iovec;

msg.msg_iovlen = 1;

msg.msg_control = NULL;

msg.msg_controllen = 0;

msg.msg_flags = 0;

if (recvmsg(s, &msg, 0) < 0)

return (ISC_FALSE);

return (ISC_TRUE);

}

#endif

#endif

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

#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 */

}

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(void) {

try_dscp_v4();

try_dscp_v6();

}

static void

initialize_dscp(void) {

RUNTIME_CHECK(isc_once_do(&once_dscp, try_dscp) == ISC_R_SUCCESS);

}

unsigned int

isc_net_probedscp(void) {

initialize_dscp();

return (dscp_result);

}

#if defined(USE_SYSCTL_PORTRANGE)

#if defined(HAVE_SYSCTLBYNAME)

static isc_result_t

getudpportrange_sysctl(int af, in_port_t *low, in_port_t *high) {

int port_low, port_high;

size_t portlen;

const char *sysctlname_lowport, *sysctlname_hiport;

if (af == AF_INET) {

sysctlname_lowport = SYSCTL_V4PORTRANGE_LOW;

sysctlname_hiport = SYSCTL_V4PORTRANGE_HIGH;

} else {

sysctlname_lowport = SYSCTL_V6PORTRANGE_LOW;

sysctlname_hiport = SYSCTL_V6PORTRANGE_HIGH;

}

portlen = sizeof(port_low);

if (sysctlbyname(sysctlname_lowport, &port_low, &portlen,

NULL, 0) < 0) {

return (ISC_R_FAILURE);

}

portlen = sizeof(port_high);

if (sysctlbyname(sysctlname_hiport, &port_high, &portlen,

NULL, 0) < 0) {

return (ISC_R_FAILURE);

}

if ((port_low & ~0xffff) != 0 || (port_high & ~0xffff) != 0)

return (ISC_R_RANGE);

*low = (in_port_t)port_low;

*high = (in_port_t)port_high;

return (ISC_R_SUCCESS);

}

#else /* !HAVE_SYSCTLBYNAME */

static isc_result_t

getudpportrange_sysctl(int af, in_port_t *low, in_port_t *high) {

int mib_lo4[4] = SYSCTL_V4PORTRANGE_LOW;

int mib_hi4[4] = SYSCTL_V4PORTRANGE_HIGH;

int mib_lo6[4] = SYSCTL_V6PORTRANGE_LOW;

int mib_hi6[4] = SYSCTL_V6PORTRANGE_HIGH;

int *mib_lo, *mib_hi, miblen;

int port_low, port_high;

size_t portlen;

if (af == AF_INET) {

mib_lo = mib_lo4;

mib_hi = mib_hi4;

miblen = sizeof(mib_lo4) / sizeof(mib_lo4[0]);

} else {

mib_lo = mib_lo6;

mib_hi = mib_hi6;

miblen = sizeof(mib_lo6) / sizeof(mib_lo6[0]);

}

portlen = sizeof(port_low);

if (sysctl(mib_lo, miblen, &port_low, &portlen, NULL, 0) < 0) {

return (ISC_R_FAILURE);

}

portlen = sizeof(port_high);

if (sysctl(mib_hi, miblen, &port_high, &portlen, NULL, 0) < 0) {

return (ISC_R_FAILURE);

}

if ((port_low & ~0xffff) != 0 || (port_high & ~0xffff) != 0)

return (ISC_R_RANGE);

*low = (in_port_t) port_low;

*high = (in_port_t) port_high;

return (ISC_R_SUCCESS);

}

#endif /* HAVE_SYSCTLBYNAME */

#endif /* USE_SYSCTL_PORTRANGE */

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);

/*

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 */

}

isc_net_disableipv4(void) {

initialize();

if (ipv4_result == ISC_R_SUCCESS)

ipv4_result = ISC_R_DISABLED;

}

isc_net_disableipv6(void) {

initialize();

if (ipv6_result == ISC_R_SUCCESS)

ipv6_result = ISC_R_DISABLED;

}

isc_net_enableipv4(void) {

initialize();

if (ipv4_result == ISC_R_DISABLED)

ipv4_result = ISC_R_SUCCESS;

}

isc_net_enableipv6(void) {

initialize();

if (ipv6_result == ISC_R_DISABLED)

ipv6_result = ISC_R_SUCCESS;

}