diff options
Diffstat (limited to 'libjava/java/net/natVMNetworkInterfacePosix.cc')
| -rw-r--r-- | libjava/java/net/natVMNetworkInterfacePosix.cc | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/libjava/java/net/natVMNetworkInterfacePosix.cc b/libjava/java/net/natVMNetworkInterfacePosix.cc new file mode 100644 index 000000000..bfb11d21c --- /dev/null +++ b/libjava/java/net/natVMNetworkInterfacePosix.cc @@ -0,0 +1,163 @@ +/* Copyright (C) 2003, 2005, 2006 Free Software Foundation + + This file is part of libgcj. + +This software is copyrighted work licensed under the terms of the +Libgcj License. Please consult the file "LIBGCJ_LICENSE" for +details. */ + +#include <config.h> +#include <platform.h> + +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif +#include <string.h> +#include <errno.h> +#include <stdlib.h> + +#include <sys/param.h> +#include <sys/types.h> +#ifdef HAVE_NETINET_IN_H +#include <netinet/in.h> +#endif +#ifdef HAVE_ARPA_INET_H +#include <arpa/inet.h> +#endif +#ifdef HAVE_NETDB_H +#include <netdb.h> +#endif +#ifdef HAVE_SYS_IOCTL_H +#define BSD_COMP /* Get FIONREAD on Solaris2. */ +#include <sys/ioctl.h> +#endif +#ifdef HAVE_NET_IF_H +#include <net/if.h> +#endif +#ifdef HAVE_IFADDRS_H +#include <ifaddrs.h> +#endif + +#include <gcj/cni.h> +#include <jvm.h> +#include <java/net/InetAddress.h> +#include <java/net/NetworkInterface.h> +#include <java/net/SocketException.h> +#include <java/net/VMNetworkInterface.h> +#include <java/util/Vector.h> + +::java::util::Vector* +java::net::VMNetworkInterface::getInterfaces () +{ + ::java::util::Vector* ht = new ::java::util::Vector (); + +#ifdef HAVE_GETIFADDRS + + struct ifaddrs *addrs; + if (::getifaddrs (&addrs) == -1) + throw new ::java::net::SocketException(JvNewStringUTF (strerror (errno))); + + for (struct ifaddrs *work = addrs; work != NULL; work = work->ifa_next) + { + // Sometimes the address can be NULL; I don't know why but + // there's nothing we can do with this. + if (! work->ifa_addr) + continue; + // We only return Inet4 or Inet6 addresses. + jbyteArray laddr; + if (work->ifa_addr->sa_family == AF_INET) + { + sockaddr_in *real = reinterpret_cast<sockaddr_in *> (work->ifa_addr); + laddr = JvNewByteArray(4); + memcpy (elements (laddr), &real->sin_addr, 4); + } +#ifdef HAVE_INET6 + else if (work->ifa_addr->sa_family == AF_INET6) + { + sockaddr_in6 *real + = reinterpret_cast<sockaddr_in6 *> (work->ifa_addr); + laddr = JvNewByteArray(16); + memcpy (elements (laddr), &real->sin6_addr, 16); + } +#endif + else + continue; + + ::java::net::InetAddress *inaddr + = ::java::net::InetAddress::getByAddress(laddr); + + // It is ok to make a new NetworkInterface for each struct; the + // java code will unify these as necessary; see + // NetworkInterface.condense(). + jstring name = JvNewStringUTF (work->ifa_name); + + ht->add (new NetworkInterface (name, inaddr)); + } + + freeifaddrs (addrs); + +#else /* ! HAVE_GETIFADDRS */ + + int fd; + int num_interfaces = 0; + struct ifconf if_data; + struct ifreq* if_record; + + if_data.ifc_len = 0; + if_data.ifc_buf = NULL; + + // Open a (random) socket to have a file descriptor for the ioctl calls. + fd = _Jv_socket (PF_INET, SOCK_DGRAM, htons (IPPROTO_IP)); + + if (fd < 0) + throw new ::java::net::SocketException; + + // Get all interfaces. If not enough buffers are available try it + // with a bigger buffer size. + do + { + num_interfaces += 16; + + if_data.ifc_len = sizeof (struct ifreq) * num_interfaces; + if_data.ifc_buf = + (char*) _Jv_Realloc (if_data.ifc_buf, if_data.ifc_len); + + // Try to get all local interfaces. + if (::ioctl (fd, SIOCGIFCONF, &if_data) < 0) + throw new java::net::SocketException; + } + while (if_data.ifc_len >= (int) (sizeof (struct ifreq) * num_interfaces)); + + // Get addresses of all interfaces. + if_record = if_data.ifc_req; + + for (int n = 0; n < if_data.ifc_len; n += sizeof (struct ifreq)) + { + struct ifreq ifr; + + memset (&ifr, 0, sizeof (ifr)); + strcpy (ifr.ifr_name, if_record->ifr_name); + + // Try to get the IPv4-address of the local interface + if (::ioctl (fd, SIOCGIFADDR, &ifr) < 0) + throw new java::net::SocketException; + + int len = 4; + struct sockaddr_in sa = *((sockaddr_in*) &(ifr.ifr_addr)); + + jbyteArray baddr = JvNewByteArray (len); + memcpy (elements (baddr), &(sa.sin_addr), len); + jstring if_name = JvNewStringLatin1 (if_record->ifr_name); + InetAddress* address = java::net::InetAddress::getByAddress (baddr); + ht->add (new NetworkInterface (if_name, address)); + if_record++; + } + + _Jv_Free (if_data.ifc_buf); + + if (fd >= 0) + _Jv_close (fd); +#endif /* HAVE_GETIFADDRS */ + + return ht; +} |