288
289 #else /* !DONT_ENABLE_IPV6 */
290
291 jint IPv6_supported()
292 {
293 int fd;
294 void *ipv6_fn;
295 SOCKETADDRESS sa;
296 socklen_t sa_len = sizeof(SOCKETADDRESS);
297
298 fd = socket(AF_INET6, SOCK_STREAM, 0) ;
299 if (fd < 0) {
300 /*
301 * TODO: We really cant tell since it may be an unrelated error
302 * for now we will assume that AF_INET6 is not available
303 */
304 return JNI_FALSE;
305 }
306
307 /*
308 * If fd 0 is a socket it means we've been launched from inetd or
309 * xinetd. If it's a socket then check the family - if it's an
310 * IPv4 socket then we need to disable IPv6.
311 */
312 if (getsockname(0, &sa.sa, &sa_len) == 0) {
313 if (sa.sa.sa_family != AF_INET6) {
314 close(fd);
315 return JNI_FALSE;
316 }
317 }
318
319 /**
320 * Linux - check if any interface has an IPv6 address.
321 * Don't need to parse the line - we just need an indication.
322 */
323 #ifdef __linux__
324 {
325 FILE *fP = fopen("/proc/net/if_inet6", "r");
326 char buf[255];
327 char *bufP;
328
329 if (fP == NULL) {
330 close(fd);
331 return JNI_FALSE;
332 }
333 bufP = fgets(buf, sizeof(buf), fP);
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288
289 #else /* !DONT_ENABLE_IPV6 */
290
291 jint IPv6_supported()
292 {
293 int fd;
294 void *ipv6_fn;
295 SOCKETADDRESS sa;
296 socklen_t sa_len = sizeof(SOCKETADDRESS);
297
298 fd = socket(AF_INET6, SOCK_STREAM, 0) ;
299 if (fd < 0) {
300 /*
301 * TODO: We really cant tell since it may be an unrelated error
302 * for now we will assume that AF_INET6 is not available
303 */
304 return JNI_FALSE;
305 }
306
307 /*
308 * If fd 0 is a socket it means we may have been launched from inetd or
309 * xinetd. If it's a socket then check the family - if it's an
310 * IPv4 socket then we need to disable IPv6.
311 */
312 if (getsockname(0, &sa.sa, &sa_len) == 0) {
313 if (sa.sa.sa_family == AF_INET) {
314 close(fd);
315 return JNI_FALSE;
316 }
317 }
318
319 /**
320 * Linux - check if any interface has an IPv6 address.
321 * Don't need to parse the line - we just need an indication.
322 */
323 #ifdef __linux__
324 {
325 FILE *fP = fopen("/proc/net/if_inet6", "r");
326 char buf[255];
327 char *bufP;
328
329 if (fP == NULL) {
330 close(fd);
331 return JNI_FALSE;
332 }
333 bufP = fgets(buf, sizeof(buf), fP);
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