* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id: getipnode.c,v 1.32 2001/11/27 01:56:28 gson Exp $ */
+/* $Id: getipnode.c,v 1.33 2002/05/27 06:54:46 marka Exp $ */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <errno.h>
#include <lwres/lwres.h>
#include <lwres/net.h>
* -1 on failure.
*/
+#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR) && \
+ !defined(IRIX_EMUL_IOCTL_SIOCGIFCONF)
+
+#ifdef __hpux
+#define lifc_len iflc_len
+#define lifc_buf iflc_buf
+#define lifc_req iflc_req
+#define LIFCONF if_laddrconf
+#else
+#define ISC_HAVE_LIFC_FAMILY 1
+#define ISC_HAVE_LIFC_FLAGS 1
+#define LIFCONF lifconf
+#endif
+
+#ifdef __hpux
+#define lifr_addr iflr_addr
+#define lifr_name iflr_name
+#define lifr_dstaddr iflr_dstaddr
+#define lifr_flags iflr_flags
+#define ss_family sa_family
+#define LIFREQ if_laddrreq
+#else
+#define LIFREQ lifreq
+#endif
+
+static int
+scan_interfaces6(int *have_v4, int *have_v6) {
+ struct LIFCONF lifc;
+ struct LIFREQ lifreq;
+ struct in_addr in4;
+ struct in6_addr in6;
+ char *buf = NULL, *cp, *cplim;
+ static unsigned int bufsiz = 4095;
+ int s, cpsize, n;
+
+ /*
+ * Set to zero. Used as loop terminators below.
+ */
+ *have_v4 = *have_v6 = 0;
+
+ /*
+ * Get interface list from system.
+ */
+ if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) == -1)
+ goto err_ret;
+
+ /*
+ * Grow buffer until large enough to contain all interface
+ * descriptions.
+ */
+ for (;;) {
+ buf = malloc(bufsiz);
+ if (buf == NULL)
+ goto err_ret;
+#ifdef ISC_HAVE_LIFC_FAMILY
+ lifc.lifc_family = AF_UNSPEC; /* request all families */
+#endif
+#ifdef ISC_HAVE_LIFC_FLAGS
+ lifc.lifc_flags = 0;
+#endif
+ lifc.lifc_len = bufsiz;
+ lifc.lifc_buf = buf;
+ if ((n = ioctl(s, SIOCGLIFCONF, (char *)&lifc)) != -1) {
+ /*
+ * Some OS's just return what will fit rather
+ * than set EINVAL if the buffer is too small
+ * to fit all the interfaces in. If
+ * lifc.lifc_len is too near to the end of the
+ * buffer we will grow it just in case and
+ * retry.
+ */
+ if (lifc.lifc_len + 2 * sizeof(lifreq) < bufsiz)
+ break;
+ }
+ if ((n == -1) && errno != EINVAL)
+ goto err_ret;
+
+ if (bufsiz > 1000000)
+ goto err_ret;
+
+ free(buf);
+ bufsiz += 4096;
+ }
+
+ /*
+ * Parse system's interface list.
+ */
+ cplim = buf + lifc.lifc_len; /* skip over if's with big ifr_addr's */
+ for (cp = buf;
+ (*have_v4 == 0 || *have_v6 == 0) && cp < cplim;
+ cp += cpsize) {
+ memcpy(&lifreq, cp, sizeof(lifreq));
+#ifdef LWRES_PLATFORM_HAVESALEN
+#ifdef FIX_ZERO_SA_LEN
+ if (lifreq.lifr_addr.sa_len == 0)
+ lifreq.lifr_addr.sa_len = 16;
+#endif
+#ifdef HAVE_MINIMUM_IFREQ
+ cpsize = sizeof(lifreq);
+ if (lifreq.lifr_addr.sa_len > sizeof(struct sockaddr))
+ cpsize += (int)lifreq.lifr_addr.sa_len -
+ (int)(sizeof(struct sockaddr));
+#else
+ cpsize = sizeof(lifreq.lifr_name) + lifreq.lifr_addr.sa_len;
+#endif /* HAVE_MINIMUM_IFREQ */
+#elif defined SIOCGIFCONF_ADDR
+ cpsize = sizeof(lifreq);
+#else
+ cpsize = sizeof(lifreq.lifr_name);
+ /* XXX maybe this should be a hard error? */
+ if (ioctl(s, SIOCGLIFADDR, (char *)&lifreq) < 0)
+ continue;
+#endif
+ switch (lifreq.lifr_addr.ss_family) {
+ case AF_INET:
+ if (*have_v4 == 0) {
+ memcpy(&in4,
+ &((struct sockaddr_in *)
+ &lifreq.lifr_addr)->sin_addr,
+ sizeof(in4));
+ if (in4.s_addr == INADDR_ANY)
+ break;
+ n = ioctl(s, SIOCGLIFFLAGS, (char *)&lifreq);
+ if (n < 0)
+ break;
+ if ((lifreq.lifr_flags & IFF_UP) == 0)
+ break;
+ *have_v4 = 1;
+ }
+ break;
+ case AF_INET6:
+ if (*have_v6 == 0) {
+ memcpy(&in6,
+ &((struct sockaddr_in6 *)
+ &lifreq.lifr_addr)->sin6_addr,
+ sizeof(in6));
+ if (memcmp(&in6, &in6addr_any,
+ sizeof(in6)) == 0)
+ break;
+ n = ioctl(s, SIOCGLIFFLAGS, (char *)&lifreq);
+ if (n < 0)
+ break;
+ if ((lifreq.lifr_flags & IFF_UP) == 0)
+ break;
+ *have_v6 = 1;
+ }
+ break;
+ }
+ }
+ if (buf != NULL)
+ free(buf);
+ close(s);
+ return (0);
+ err_ret:
+ if (buf != NULL)
+ free(buf);
+ if (s != -1)
+ close(s);
+ return (-1);
+}
+#endif
+
static int
scan_interfaces(int *have_v4, int *have_v6) {
-#if 1
+#if !defined(SIOCGIFCONF) || !defined(SIOCGIFADDR)
*have_v4 = *have_v6 = 1;
return (0);
#else
struct ifconf ifc;
- struct ifreq ifreq;
+ union {
+ char _pad[256]; /* leave space for IPv6 addresses */
+ struct ifreq ifreq;
+ } u;
struct in_addr in4;
struct in6_addr in6;
char *buf = NULL, *cp, *cplim;
- static int bufsiz = 4095;
- int s, cpsize, n;
+ static unsigned int bufsiz = 4095;
+ int s, n;
+ size_t cpsize;
+
+#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR) && \
+ !defined(IRIX_EMUL_IOCTL_SIOCGIFCONF)
+ /*
+ * Try to scan the interfaces using IPv6 ioctls().
+ */
+ if (!scan_interfaces6(have_v4, have_v6))
+ return (0);
+#endif
/*
* Set to zero. Used as loop terminators below.
/*
* Some OS's just return what will fit rather
* than set EINVAL if the buffer is too small
- * to fit all the interfaces in. If
+ * to fit all the interfaces in. If
* ifc.ifc_len is too near to the end of the
* buffer we will grow it just in case and
* retry.
*/
- if (ifc.ifc_len + 2 * sizeof(ifreq) < bufsiz)
+ if (ifc.ifc_len + 2 * sizeof(u.ifreq) < bufsiz)
break;
}
#endif
for (cp = buf;
(*have_v4 == 0 || *have_v6 == 0) && cp < cplim;
cp += cpsize) {
- memcpy(&ifreq, cp, sizeof(ifreq));
+ memcpy(&u.ifreq, cp, sizeof(u.ifreq));
#ifdef LWRES_PLATFORM_HAVESALEN
#ifdef FIX_ZERO_SA_LEN
- if (ifreq.ifr_addr.sa_len == 0)
- ifreq.ifr_addr.sa_len = IN6ADDRSZ;
+ if (u.ifreq.ifr_addr.sa_len == 0)
+ u.ifreq.ifr_addr.sa_len = 16;
#endif
#ifdef HAVE_MINIMUM_IFREQ
- cpsize = sizeof(ifreq);
- if (ifreq.ifr_addr.sa_len > sizeof(struct sockaddr))
- cpsize += (int)ifreq.ifr_addr.sa_len -
+ cpsize = sizeof(u.ifreq);
+ if (u.ifreq.ifr_addr.sa_len > sizeof(struct sockaddr))
+ cpsize += (int)u.ifreq.ifr_addr.sa_len -
(int)(sizeof(struct sockaddr));
#else
- cpsize = sizeof(ifreq.ifr_name) + ifreq.ifr_addr.sa_len;
+ cpsize = sizeof(u.ifreq.ifr_name) + u.ifreq.ifr_addr.sa_len;
#endif /* HAVE_MINIMUM_IFREQ */
+ if (cpsize > sizeof(u.ifreq) && cpsize <= sizeof(u))
+ memcpy(&u.ifreq, cp, cpsize);
#elif defined SIOCGIFCONF_ADDR
- cpsize = sizeof(ifreq);
+ cpsize = sizeof(u.ifreq);
#else
- cpsize = sizeof(ifreq.ifr_name);
+ cpsize = sizeof(u.ifreq.ifr_name);
/* XXX maybe this should be a hard error? */
- if (ioctl(s, SIOCGIFADDR, (char *)&ifreq) < 0)
+ if (ioctl(s, SIOCGIFADDR, (char *)&u.ifreq) < 0)
continue;
-#endif /* LWRES_PLATFORM_HAVESALEN */
- switch (ifreq.ifr_addr.sa_family) {
+#endif
+ switch (u.ifreq.ifr_addr.sa_family) {
case AF_INET:
if (*have_v4 == 0) {
memcpy(&in4,
&((struct sockaddr_in *)
- &ifreq.ifr_addr)->sin_addr,
+ &u.ifreq.ifr_addr)->sin_addr,
sizeof(in4));
if (in4.s_addr == INADDR_ANY)
break;
- n = ioctl(s, SIOCGIFFLAGS, (char *)&ifreq);
+ n = ioctl(s, SIOCGIFFLAGS, (char *)&u.ifreq);
if (n < 0)
break;
- if ((ifreq.ifr_flags & IFF_UP) == 0)
+ if ((u.ifreq.ifr_flags & IFF_UP) == 0)
break;
*have_v4 = 1;
- }
+ }
break;
case AF_INET6:
if (*have_v6 == 0) {
memcpy(&in6,
&((struct sockaddr_in6 *)
- &ifreq.ifr_addr)->sin6_addr,
+ &u.ifreq.ifr_addr)->sin6_addr,
sizeof(in6));
if (memcmp(&in6, &in6addr_any,
sizeof(in6)) == 0)
break;
- n = ioctl(s, SIOCGIFFLAGS, (char *)&ifreq);
+ n = ioctl(s, SIOCGIFFLAGS, (char *)&u.ifreq);
if (n < 0)
break;
- if ((ifreq.ifr_flags & IFF_UP) == 0)
+ if ((u.ifreq.ifr_flags & IFF_UP) == 0)
break;
*have_v6 = 1;
}
projects / thirdparty / bind9.git / commitdiff
