[gssdp] client: Split get_host_ip
- From: Jens Georg <jensgeorg src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gssdp] client: Split get_host_ip
- Date: Sat, 15 Oct 2016 17:58:36 +0000 (UTC)
commit 5a232ff64cbb4bc1ae8bb6d6163f60124fb8f186
Author: Jens Georg <mail jensge org>
Date: Tue Oct 11 22:32:26 2016 +0200
client: Split get_host_ip
Put the different network implementations in different files for better
maintainability
Signed-off-by: Jens Georg <mail jensge org>
configure.ac | 8 +
libgssdp/Makefile.am | 8 +-
libgssdp/gssdp-client.c | 602 +------------------------------------------
libgssdp/gssdp-net-bionic.c | 320 +++++++++++++++++++++++
libgssdp/gssdp-net-posix.c | 208 +++++++++++++++
libgssdp/gssdp-net-win32.c | 236 +++++++++++++++++
libgssdp/gssdp-net.h | 65 +++++
7 files changed, 857 insertions(+), 590 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index bfac21d..a5b7a7e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -122,6 +122,14 @@ esac
AC_MSG_RESULT([$target_android])
AM_CONDITIONAL(TARGET_ANDROID, [test $target_android = yes])
+target_generic=no
+AS_IF([test "x$target_android" = "xno"],
+ [AS_IF([test "x$os_win32" = "xno"],
+ [target_generic="yes"])
+ ])
+
+AM_CONDITIONAL(TARGET_GENERIC, [test $target_generic = "yes"])
+
dnl Check whether in_pktinfo is available
AC_CHECK_TYPE(struct in_pktinfo,
[
diff --git a/libgssdp/Makefile.am b/libgssdp/Makefile.am
index 0012ef8..b37e691 100644
--- a/libgssdp/Makefile.am
+++ b/libgssdp/Makefile.am
@@ -71,6 +71,7 @@ libgssdp_1_2_la_LDFLAGS = -version-info $(LTVERSION) $(WARN_LDFLAGS)
libgssdp_1_2_la_SOURCES = $(introspection_sources) \
gssdp-client-private.h \
gssdp-protocol.h \
+ gssdp-net.h \
gssdp-socket-source.c \
gssdp-socket-source.h \
gssdp-socket-functions.c \
@@ -85,15 +86,20 @@ endif
libgssdp_1_2_la_LIBADD = $(LIBGSSDP_LIBS)
if OS_WIN32
-
+libgssdp_1_2_la_SOURCES += gssdp-net-win32.c
libgssdp_1_2_la_LIBADD += -lws2_32 -liphlpapi
libgssdp_1_2_la_LDFLAGS += -no-undefined
endif
if TARGET_ANDROID
+libgssdp_1_2_la_SOURCES += gssdp-net-bionic.c
libgssdp_1_2_la_LIBADD += -llog
endif
+if TARGET_GENERIC
+libgssdp_1_2_la_SOURCES += gssdp-net-posix.c
+endif
+
CLEANFILES = $(BUILT_SOURCES)
-include $(INTROSPECTION_MAKEFILE)
diff --git a/libgssdp/gssdp-client.c b/libgssdp/gssdp-client.c
index f68e7ab..b123475 100644
--- a/libgssdp/gssdp-client.c
+++ b/libgssdp/gssdp-client.c
@@ -41,6 +41,7 @@
#include "gssdp-error.h"
#include "gssdp-socket-source.h"
#include "gssdp-protocol.h"
+#include "gssdp-net.h"
#include "gssdp-socket-functions.h"
#ifdef HAVE_PKTINFO
#include "gssdp-pktinfo-message.h"
@@ -48,53 +49,19 @@
#include <sys/types.h>
#include <glib.h>
-#ifndef G_OS_WIN32
-#include <sys/socket.h>
+#ifdef G_OS_WIN32
+#include <winsock2.h>
+#else
#include <sys/utsname.h>
-#include <netinet/in.h>
#include <arpa/inet.h>
-#ifdef __linux__
-/* headers for ARP */
-#include <net/if_arp.h>
-#include <sys/ioctl.h>
-#endif
-#else
-#define _WIN32_WINNT 0x502
-#include <winsock2.h>
-#include <ws2tcpip.h>
-#include <iphlpapi.h>
-typedef int socklen_t;
-/* from the return value of inet_addr */
-typedef unsigned long in_addr_t;
#endif
+
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
-#ifndef G_OS_WIN32
-#include <arpa/inet.h>
-#include <net/if.h>
-#ifndef __BIONIC__
-#include <ifaddrs.h>
-#else
-#include <sys/ioctl.h>
-#include <net/if.h>
-#include <stdlib.h>
-#endif
-#endif
-#include <libsoup/soup-headers.h>
-#ifdef HAVE_SIOCGIFINDEX
-#include <sys/ioctl.h>
-#endif
-
-#ifndef INET6_ADDRSTRLEN
-#define INET6_ADDRSTRLEN 46
-#endif
-
-#ifdef __BIONIC__
-#include <android/log.h>
-#endif
+#include <libsoup/soup-headers.h>
/* Size of the buffer used for reading from the socket */
#define BUF_SIZE 65536
@@ -106,16 +73,6 @@ static void
gssdp_client_initable_iface_init (gpointer g_iface,
gpointer iface_data);
-struct _GSSDPNetworkDevice {
- char *iface_name;
- char *host_ip;
- GInetAddress *host_addr;
- char *network;
- struct sockaddr_in mask;
- gint index;
-};
-typedef struct _GSSDPNetworkDevice GSSDPNetworkDevice;
-
struct _GSSDPClientPrivate {
char *server_id;
@@ -191,10 +148,6 @@ gssdp_client_initable_init (GInitable *initable,
GCancellable *cancellable,
GError **error);
-static char *
-arp_lookup (GSSDPClient *client,
- const char *ip_address);
-
static void
gssdp_client_init (GSSDPClient *client)
{
@@ -226,21 +179,8 @@ gssdp_client_initable_init (GInitable *initable,
if (priv->initialized)
return TRUE;
-#ifdef G_OS_WIN32
- WSADATA wsaData = {0};
- if (WSAStartup (MAKEWORD (2,2), &wsaData) != 0) {
- gchar *message;
-
- message = g_win32_error_message (WSAGetLastError ());
- g_set_error_literal (error,
- GSSDP_ERROR,
- GSSDP_ERROR_FAILED,
- message);
- g_free (message);
-
+ if (!gssdp_net_init (error))
return FALSE;
- }
-#endif
/* Make sure all network info is available to us */
if (!init_network_info (client, &internal_error))
@@ -423,9 +363,8 @@ gssdp_client_finalize (GObject *object)
{
GSSDPClient *client = GSSDP_CLIENT (object);
GSSDPClientPrivate *priv = gssdp_client_get_instance_private (client);
-#ifdef G_OS_WIN32
- WSACleanup ();
-#endif
+
+ gssdp_net_shutdown ();
g_clear_pointer (&priv->server_id, g_free);
g_clear_pointer (&priv->device.iface_name, g_free);
@@ -780,7 +719,7 @@ gssdp_client_add_cache_entry (GSSDPClient *client,
priv = gssdp_client_get_instance_private (client);
- hwaddr = arp_lookup (client, ip_address);
+ hwaddr = gssdp_net_arp_lookup (&priv->device, ip_address);
if (hwaddr)
g_hash_table_insert (priv->user_agent_cache,
@@ -808,7 +747,7 @@ gssdp_client_guess_user_agent (GSSDPClient *client,
priv = gssdp_client_get_instance_private (client);
- hwaddr = arp_lookup (client, ip_address);
+ hwaddr = gssdp_net_arp_lookup (&priv->device, ip_address);
if (hwaddr) {
const char *agent;
@@ -1361,479 +1300,6 @@ search_socket_source_cb (G_GNUC_UNUSED GIOChannel *source,
return socket_source_cb (priv->search_socket, client);
}
-#ifdef G_OS_WIN32
-static gboolean
-is_primary_adapter (PIP_ADAPTER_ADDRESSES adapter)
-{
- int family =
- adapter->FirstUnicastAddress->Address.lpSockaddr->sa_family;
-
- return !(adapter->IfType == IF_TYPE_SOFTWARE_LOOPBACK ||
- family == AF_INET6);
-}
-
-static gboolean
-extract_address_and_prefix (PIP_ADAPTER_UNICAST_ADDRESS adapter,
- PIP_ADAPTER_PREFIX prefix,
- char *iface,
- char *network) {
- DWORD ret = 0;
- DWORD len = INET6_ADDRSTRLEN;
-
- ret = WSAAddressToStringA (adapter->Address.lpSockaddr,
- adapter->Address.iSockaddrLength,
- NULL,
- iface,
- &len);
- if (ret != 0)
- return FALSE;
-
- if (prefix) {
- ret = WSAAddressToStringA (prefix->Address.lpSockaddr,
- prefix->Address.iSockaddrLength,
- NULL,
- network,
- &len);
- if (ret != 0)
- return FALSE;
- } else if (strcmp (iface, "127.0.0.1"))
- strcpy (network, "127.0.0.0");
- else
- return FALSE;
-
- return TRUE;
-}
-#endif
-
-static int
-query_ifindex (const char *iface_name)
-{
-#if defined(HAVE_IFNAMETOINDEX)
- return if_nametoindex (iface_name);
-
-#elif defined(HAVE_SIOCGIFINDEX)
- int fd;
- int result;
- struct ifreq ifr;
-
- fd = socket (AF_INET, SOCK_STREAM, 0);
- if (fd < 0)
- return -1;
-
- memset (&ifr, 0, sizeof(struct ifreq));
- strncpy (ifr.ifr_ifrn.ifrn_name, iface_name, IFNAMSIZ);
-
- result = ioctl (fd, SIOCGIFINDEX, (char *)&ifr);
- close (fd);
-
- if (result == 0)
- return ifr.ifr_ifindex;
- else
- return -1;
-#else
- return -1;
-#endif
-}
-
-/*
- * Get the host IP for the specified interface. If no interface is specified,
- * it gets the IP of the first up & running interface and sets @interface
- * appropriately.
- */
-
-static gboolean
-get_host_ip (GSSDPNetworkDevice *device)
-{
-#ifdef G_OS_WIN32
- GList *up_ifaces = NULL, *ifaceptr = NULL;
- ULONG flags = GAA_FLAG_INCLUDE_PREFIX |
- GAA_FLAG_SKIP_DNS_SERVER |
- GAA_FLAG_SKIP_MULTICAST;
- DWORD size = 15360; /* Use 15k buffer initially as documented in MSDN */
- DWORD ret;
- PIP_ADAPTER_ADDRESSES adapters_addresses;
- PIP_ADAPTER_ADDRESSES adapter;
-
- do {
- adapters_addresses = (PIP_ADAPTER_ADDRESSES) g_malloc0 (size);
- ret = GetAdaptersAddresses (AF_UNSPEC,
- flags,
- NULL,
- adapters_addresses,
- &size);
- if (ret == ERROR_BUFFER_OVERFLOW)
- g_free (adapters_addresses);
- } while (ret == ERROR_BUFFER_OVERFLOW);
-
- if (ret == ERROR_SUCCESS)
- for (adapter = adapters_addresses;
- adapter != NULL;
- adapter = adapter->Next) {
- if (adapter->FirstUnicastAddress == NULL)
- continue;
- if (adapter->OperStatus != IfOperStatusUp)
- continue;
- /* skip Point-to-Point devices */
- if (adapter->IfType == IF_TYPE_PPP)
- continue;
-
- if (device->iface_name != NULL &&
- strcmp (device->iface_name, adapter->AdapterName) != 0)
- continue;
-
- /* I think that IPv6 is done via pseudo-adapters, so
- * that there are either IPv4 or IPv6 addresses defined
- * on the adapter.
- * Loopback-Devices and IPv6 go to the end of the list,
- * IPv4 to the front
- */
- if (is_primary_adapter (adapter))
- up_ifaces = g_list_prepend (up_ifaces, adapter);
- else
- up_ifaces = g_list_append (up_ifaces, adapter);
- }
-
- for (ifaceptr = up_ifaces;
- ifaceptr != NULL;
- ifaceptr = ifaceptr->next) {
- char ip[INET6_ADDRSTRLEN];
- char prefix[INET6_ADDRSTRLEN];
- const char *p, *q;
- PIP_ADAPTER_ADDRESSES adapter;
- PIP_ADAPTER_UNICAST_ADDRESS address;
- PIP_ADAPTER_PREFIX address_prefix;
-
- p = NULL;
-
- adapter = (PIP_ADAPTER_ADDRESSES) ifaceptr->data;
-
- for (address_prefix = adapter->FirstPrefix;
- address_prefix != NULL;
- address_prefix = address_prefix->Next)
- if (address_prefix->Address.lpSockaddr->sa_family == AF_INET)
- break;
-
- if (address_prefix == NULL)
- continue;
-
- for (address = adapter->FirstUnicastAddress;
- address != NULL;
- address = address->Next) {
- if (address->Address.lpSockaddr->sa_family != AF_INET)
- continue;
-
- if (extract_address_and_prefix (address,
- address_prefix,
- ip,
- prefix)) {
- p = ip;
- q = prefix;
- }
-
- if (p != NULL) {
- device->host_ip = g_strdup (p);
- /* This relies on the compiler doing an arithmetic
- * shift here!
- */
- gint32 mask = 0;
- if (address_prefix->PrefixLength > 0) {
- mask = (gint32) 0x80000000;
- mask >>= address_prefix->PrefixLength - 1;
- }
- device->mask.sin_family = AF_INET;
- device->mask.sin_port = 0;
- device->mask.sin_addr.s_addr = htonl ((guint32) mask);
-
- if (device->iface_name == NULL)
- device->iface_name = g_strdup (adapter->AdapterName);
- if (device->network == NULL)
- device->network = g_strdup (q);
- break;
- }
- }
-
- if (p != NULL)
- break;
-
- }
- g_list_free (up_ifaces);
- g_free (adapters_addresses);
-
- return TRUE;
-#elif defined(__BIONIC__)
- struct ifreq *ifaces = NULL;
- struct ifreq *iface = NULL;
- struct ifreq tmp_iface;
- struct ifconf ifconfigs;
- struct sockaddr_in *address, *netmask;
- struct in_addr net_address;
- uint32_t ip;
- int if_buf_size, sock, i, if_num;
- GList *if_ptr, *if_list = NULL;
-
- if ((sock = socket (AF_INET, SOCK_STREAM, 0)) < 0) {
- __android_log_write (ANDROID_LOG_WARN,
- "gssdp",
- "Couldn't create socket");
- return FALSE;
- }
-
- /* Fill ifaces with the available interfaces
- * we incrementally proceed in chunks of 4
- * till getting the full list
- */
-
- if_buf_size = 0;
- do {
- if_buf_size += 4 * sizeof (struct ifreq);
- ifaces = g_realloc (ifaces, if_buf_size);
- ifconfigs.ifc_len = if_buf_size;
- ifconfigs.ifc_buf = (char *) ifaces;
-
- /* FIXME: IPv4 only. This ioctl only deals with AF_INET */
- if (ioctl (sock, SIOCGIFCONF, &ifconfigs) == -1) {
- __android_log_print (ANDROID_LOG_WARN, "gssdp",
- "Couldn't get list of devices. Asked for: %d",
- if_buf_size / sizeof (struct ifreq));
-
- goto fail;
- }
-
- } while (ifconfigs.ifc_len >= if_buf_size);
-
- if_num = ifconfigs.ifc_len / sizeof (struct ifreq);
-
- if (!device->iface_name) {
- __android_log_print (ANDROID_LOG_DEBUG, "gssdp",
- "Got list of %d interfaces. Looking for a suitable one",
- if_num);
- } else {
- __android_log_print (ANDROID_LOG_DEBUG, "gssdp",
- "List of %d interfaces ready. Now finding %s",
- if_num, device->iface_name);
- }
-
- /* Buildup prioritized interface list
- */
-
- for (i = 0; i < if_num; i++) {
-
- address = (struct sockaddr_in *) &(ifaces[i].ifr_addr);
-
- __android_log_print (ANDROID_LOG_DEBUG,
- "gssdp",
- "Trying interface: %s",
- ifaces[i].ifr_name);
-
- if (!address->sin_addr.s_addr) {
- __android_log_write (ANDROID_LOG_DEBUG, "gssdp",
- "No configured address. Discarding");
- continue;
- }
-
- memcpy (&tmp_iface, &ifaces[i], sizeof (struct ifreq));
-
- if (ioctl (sock, SIOCGIFFLAGS, &tmp_iface) == -1) {
- __android_log_write (ANDROID_LOG_DEBUG, "gssdp",
- "Couldn't get flags. Discarding");
- continue;
- }
-
- /* If an specific interface query was passed over.. */
- if (device->iface_name &&
- g_strcmp0 (device->iface_name, tmp_iface.ifr_name)) {
- continue;
- } else if (!(tmp_iface.ifr_flags & IFF_UP) ||
- tmp_iface.ifr_flags & IFF_POINTOPOINT) {
- continue;
- }
-
- /* Prefer non loopback */
- if (ifaces[i].ifr_flags & IFF_LOOPBACK)
- if_list = g_list_append (if_list, ifaces + i);
- else
- if_list = g_list_prepend (if_list, ifaces + i);
-
- if (device->iface_name)
- break;
- }
-
- if (!g_list_length (if_list)) {
- __android_log_write (ANDROID_LOG_DEBUG,
- "gssdp",
- "No usable interfaces found");
- goto fail;
- }
-
- /* Fill device with data from the first interface
- * we can get complete config info for and return
- */
-
- for (if_ptr = if_list;
- if_ptr != NULL;
- if_ptr = g_list_next (if_ptr)) {
-
- iface = (struct ifreq *) if_ptr->data;
- address = (struct sockaddr_in *) &(iface->ifr_addr);
- netmask = (struct sockaddr_in *) &(iface->ifr_netmask);
-
- device->host_ip = g_malloc0 (INET_ADDRSTRLEN);
-
- if (inet_ntop (AF_INET, &(address->sin_addr),
- device->host_ip, INET_ADDRSTRLEN) == NULL) {
-
- __android_log_print (ANDROID_LOG_INFO,
- "gssdp",
- "Failed to get ip for: %s, %s",
- iface->ifr_name,
- strerror (errno));
-
- g_free (device->host_ip);
- device->host_ip = NULL;
-
- continue;
- }
-
- ip = address->sin_addr.s_addr;
-
- if (ioctl (sock, SIOCGIFNETMASK, iface) == -1) {
- __android_log_write (ANDROID_LOG_DEBUG, "gssdp",
- "Couldn't get netmask. Discarding");
- g_free (device->host_ip);
- device->host_ip = NULL;
-
- continue;
- }
-
- memcpy (&device->mask, netmask, sizeof (struct sockaddr_in));
-
- if (device->network == NULL) {
- device->network = g_malloc0 (INET_ADDRSTRLEN);
-
- net_address.s_addr = ip & netmask->sin_addr.s_addr;
-
- if (inet_ntop (AF_INET, &net_address,
- device->network, INET_ADDRSTRLEN) == NULL) {
-
- __android_log_print (ANDROID_LOG_WARN, "gssdp",
- "Failed to get nw for: %s, %s",
- iface->ifr_name, strerror (errno));
-
- g_clear_pointer (&device->host_ip, g_free);
- g_clear_pointer (&device->network, g_free);
-
- continue;
- }
- }
-
- if (!device->iface_name)
- device->iface_name = g_strdup (iface->ifr_name);
-
- device->index = query_ifindex (device->iface_name);
-
- goto success;
-
- }
-
- __android_log_write (ANDROID_LOG_WARN, "gssdp",
- "Traversed whole list without finding a configured device");
-
-fail:
- __android_log_write (ANDROID_LOG_WARN,
- "gssdp",
- "Failed to get configuration for device");
- g_free (ifaces);
- g_list_free (if_list);
- close (sock);
-
- return FALSE;
-success:
- __android_log_print (ANDROID_LOG_DEBUG, "gssdp",
- "Returned config params for device: %s ip: %s network: %s",
- device->iface_name, device->host_ip, device->network);
- g_free (ifaces);
- g_list_free (if_list);
- close (sock);
- return TRUE;
-#else
- struct ifaddrs *ifa_list, *ifa;
- GList *up_ifaces, *ifaceptr;
-
- up_ifaces = NULL;
-
- if (getifaddrs (&ifa_list) != 0) {
- g_warning ("Failed to retrieve list of network interfaces: %s",
- strerror (errno));
-
- return FALSE;
- }
-
- for (ifa = ifa_list; ifa != NULL; ifa = ifa->ifa_next) {
- if (ifa->ifa_addr == NULL)
- continue;
-
- if (device->iface_name &&
- !g_str_equal (device->iface_name, ifa->ifa_name))
- continue;
- else if (!(ifa->ifa_flags & IFF_UP))
- continue;
- else if ((ifa->ifa_flags & IFF_POINTOPOINT))
- continue;
-
- /* Loopback and IPv6 interfaces go at the bottom on the list */
- if ((ifa->ifa_flags & IFF_LOOPBACK) ||
- ifa->ifa_addr->sa_family == AF_INET6)
- up_ifaces = g_list_append (up_ifaces, ifa);
- else
- up_ifaces = g_list_prepend (up_ifaces, ifa);
- }
-
- for (ifaceptr = up_ifaces;
- ifaceptr != NULL;
- ifaceptr = ifaceptr->next) {
- char ip[INET6_ADDRSTRLEN];
- char net[INET6_ADDRSTRLEN];
- const char *p, *q;
- struct sockaddr_in *s4, *s4_mask;
- struct in_addr net_addr;
- const guint8 *bytes;
-
- ifa = ifaceptr->data;
-
- if (ifa->ifa_addr->sa_family != AF_INET) {
- continue;
- }
-
- s4 = (struct sockaddr_in *) ifa->ifa_addr;
- p = inet_ntop (AF_INET, &s4->sin_addr, ip, sizeof (ip));
- device->host_ip = g_strdup (p);
-
- bytes = (const guint8 *) &s4->sin_addr;
- device->host_addr = g_inet_address_new_from_bytes
- (bytes, G_SOCKET_FAMILY_IPV4);
-
- s4_mask = (struct sockaddr_in *) ifa->ifa_netmask;
- memcpy (&(device->mask), s4_mask, sizeof (struct sockaddr_in));
- net_addr.s_addr = (in_addr_t) s4->sin_addr.s_addr &
- (in_addr_t) s4_mask->sin_addr.s_addr;
- q = inet_ntop (AF_INET, &net_addr, net, sizeof (net));
-
- device->index = query_ifindex (ifa->ifa_name);
-
- if (device->iface_name == NULL)
- device->iface_name = g_strdup (ifa->ifa_name);
- if (device->network == NULL)
- device->network = g_strdup (q);
- break;
- }
-
- g_list_free (up_ifaces);
- freeifaddrs (ifa_list);
-
- return TRUE;
-#endif
-}
-
static gboolean
init_network_info (GSSDPClient *client, GError **error)
{
@@ -1846,7 +1312,7 @@ init_network_info (GSSDPClient *client, GError **error)
*/
if (priv->device.iface_name == NULL ||
priv->device.host_ip == NULL)
- get_host_ip (&(priv->device));
+ gssdp_net_get_host_ip (&(priv->device));
else {
/* Ugly. Ideally, get_host_ip needs to be run everytime, but
* it is currently to stupid so just query index here if we
@@ -1856,7 +1322,7 @@ init_network_info (GSSDPClient *client, GError **error)
* support this.
*/
priv->device.index =
- query_ifindex (priv->device.iface_name);
+ gssdp_net_query_ifindex (&priv->device);
}
if (priv->device.host_addr == NULL &&
@@ -1886,45 +1352,3 @@ init_network_info (GSSDPClient *client, GError **error)
return ret;
}
-static char *
-arp_lookup (GSSDPClient *client, const char *ip_address)
-{
-#if defined(__linux__)
- GSSDPClientPrivate *priv = gssdp_client_get_instance_private (client);
- struct arpreq req;
- struct sockaddr_in *sin;
- GSocket *socket;
-
- memset (&req, 0, sizeof (req));
-
- /* FIXME: Update when we support IPv6 properly */
- sin = (struct sockaddr_in *) &req.arp_pa;
- sin->sin_family = AF_INET;
- sin->sin_addr.s_addr = inet_addr (ip_address);
-
- strncpy (req.arp_dev,
- priv->device.iface_name,
- sizeof (req.arp_dev) - 1 /* nul terminator */);
- socket = gssdp_socket_source_get_socket (priv->search_socket);
-
- if (ioctl (g_socket_get_fd (socket), SIOCGARP, (caddr_t) &req) < 0) {
- return NULL;
- }
-
- if (req.arp_flags & ATF_COM) {
- unsigned char *buf = (unsigned char *) req.arp_ha.sa_data;
-
- return g_strdup_printf ("%02X:%02X:%02X:%02X:%02X:%02X",
- buf[0],
- buf[1],
- buf[2],
- buf[3],
- buf[4],
- buf[5]);
- }
-
- return NULL;
-#else
- return g_strdup (ip_address);
-#endif
-}
diff --git a/libgssdp/gssdp-net-bionic.c b/libgssdp/gssdp-net-bionic.c
new file mode 100644
index 0000000..ee070f6
--- /dev/null
+++ b/libgssdp/gssdp-net-bionic.c
@@ -0,0 +1,320 @@
+/*
+ * Copyright (C) 2016 Jens Georg <mail jensge org>
+ *
+ * Author: Jens Georg <mail jensge org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include "gssdp-net.h"
+
+#include <glib.h>
+
+#include <errno.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <net/if.h>
+#include <arpa/inet.h>
+
+#ifdef __linux__
+#include <net/if_arp.h>
+#endif
+
+#include <android/log.h>
+
+gboolean
+gssdp_net_init (GError **error)
+{
+ return TRUE;
+}
+
+void
+gssdp_net_shutdown (void)
+{
+}
+
+int
+gssdp_net_query_ifindex (GSSDPNetworkDevice *device)
+{
+#if defined(HAVE_IFNAMETOINDEX)
+ return if_nametoindex (device->iface_name);
+
+#elif defined(HAVE_SIOCGIFINDEX)
+ int fd;
+ int result;
+ struct ifreq ifr;
+
+ fd = socket (AF_INET, SOCK_STREAM, 0);
+ if (fd < 0)
+ return -1;
+
+ memset (&ifr, 0, sizeof(struct ifreq));
+ strncpy (ifr.ifr_ifrn.ifrn_name, device->iface_name, IFNAMSIZ);
+
+ result = ioctl (fd, SIOCGIFINDEX, (char *)&ifr);
+ close (fd);
+
+ if (result == 0)
+ return ifr.ifr_ifindex;
+ else
+ return -1;
+#else
+ return -1;
+#endif
+}
+
+char *
+gssdp_net_arp_lookup (GSSDPNetworkDevice *device, const char *ip_address)
+{
+#if defined(__linux__)
+ struct arpreq req;
+ struct sockaddr_in *sin;
+ int fd = -1;
+
+ memset (&req, 0, sizeof (req));
+
+ /* FIXME: Update when we support IPv6 properly */
+ sin = (struct sockaddr_in *) &req.arp_pa;
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = inet_addr (ip_address);
+
+ /* copy name, leave place for nul terminator */;
+ strncpy (req.arp_dev, device->iface_name, sizeof (req.arp_dev) - 1);
+
+ fd = socket (AF_INET, SOCK_STREAM, 0);
+ if (fd < 0)
+ return g_strdup (ip_address);
+
+ if (ioctl (fd, SIOCGARP, (caddr_t) &req) < 0) {
+ return NULL;
+ }
+ close (fd);
+
+ if (req.arp_flags & ATF_COM) {
+ unsigned char *buf = (unsigned char *) req.arp_ha.sa_data;
+
+ return g_strdup_printf ("%02X:%02X:%02X:%02X:%02X:%02X",
+ buf[0],
+ buf[1],
+ buf[2],
+ buf[3],
+ buf[4],
+ buf[5]);
+ }
+
+ return g_strdup (ip_address);
+#else
+ return g_strdup (ip_address);
+#endif
+}
+
+gboolean
+gssdp_net_get_host_ip (GSSDPNetworkDevice *device)
+{
+ struct ifreq *ifaces = NULL;
+ struct ifreq *iface = NULL;
+ struct ifreq tmp_iface;
+ struct ifconf ifconfigs;
+ struct sockaddr_in *address, *netmask;
+ struct in_addr net_address;
+ uint32_t ip;
+ int if_buf_size, sock, i, if_num;
+ GList *if_ptr, *if_list = NULL;
+
+ if ((sock = socket (AF_INET, SOCK_STREAM, 0)) < 0) {
+ __android_log_write (ANDROID_LOG_WARN,
+ "gssdp",
+ "Couldn't create socket");
+ return FALSE;
+ }
+
+ /* Fill ifaces with the available interfaces
+ * we incrementally proceed in chunks of 4
+ * till getting the full list
+ */
+
+ if_buf_size = 0;
+ do {
+ if_buf_size += 4 * sizeof (struct ifreq);
+ ifaces = g_realloc (ifaces, if_buf_size);
+ ifconfigs.ifc_len = if_buf_size;
+ ifconfigs.ifc_buf = (char *) ifaces;
+
+ /* FIXME: IPv4 only. This ioctl only deals with AF_INET */
+ if (ioctl (sock, SIOCGIFCONF, &ifconfigs) == -1) {
+ __android_log_print (ANDROID_LOG_WARN, "gssdp",
+ "Couldn't get list of devices. Asked for: %d",
+ if_buf_size / sizeof (struct ifreq));
+
+ goto fail;
+ }
+
+ } while (ifconfigs.ifc_len >= if_buf_size);
+
+ if_num = ifconfigs.ifc_len / sizeof (struct ifreq);
+
+ if (!device->iface_name) {
+ __android_log_print (ANDROID_LOG_DEBUG, "gssdp",
+ "Got list of %d interfaces. Looking for a suitable one",
+ if_num);
+ } else {
+ __android_log_print (ANDROID_LOG_DEBUG, "gssdp",
+ "List of %d interfaces ready. Now finding %s",
+ if_num, device->iface_name);
+ }
+
+ /* Buildup prioritized interface list
+ */
+
+ for (i = 0; i < if_num; i++) {
+
+ address = (struct sockaddr_in *) &(ifaces[i].ifr_addr);
+
+ __android_log_print (ANDROID_LOG_DEBUG,
+ "gssdp",
+ "Trying interface: %s",
+ ifaces[i].ifr_name);
+
+ if (!address->sin_addr.s_addr) {
+ __android_log_write (ANDROID_LOG_DEBUG, "gssdp",
+ "No configured address. Discarding");
+ continue;
+ }
+
+ memcpy (&tmp_iface, &ifaces[i], sizeof (struct ifreq));
+
+ if (ioctl (sock, SIOCGIFFLAGS, &tmp_iface) == -1) {
+ __android_log_write (ANDROID_LOG_DEBUG, "gssdp",
+ "Couldn't get flags. Discarding");
+ continue;
+ }
+
+ /* If an specific interface query was passed over.. */
+ if (device->iface_name &&
+ g_strcmp0 (device->iface_name, tmp_iface.ifr_name)) {
+ continue;
+ } else if (!(tmp_iface.ifr_flags & IFF_UP) ||
+ tmp_iface.ifr_flags & IFF_POINTOPOINT) {
+ continue;
+ }
+
+ /* Prefer non loopback */
+ if (ifaces[i].ifr_flags & IFF_LOOPBACK)
+ if_list = g_list_append (if_list, ifaces + i);
+ else
+ if_list = g_list_prepend (if_list, ifaces + i);
+
+ if (device->iface_name)
+ break;
+ }
+
+ if (!g_list_length (if_list)) {
+ __android_log_write (ANDROID_LOG_DEBUG,
+ "gssdp",
+ "No usable interfaces found");
+ goto fail;
+ }
+
+ /* Fill device with data from the first interface
+ * we can get complete config info for and return
+ */
+
+ for (if_ptr = if_list; if_ptr != NULL;
+ if_ptr = g_list_next (if_ptr)) {
+
+ iface = (struct ifreq *) if_ptr->data;
+ address = (struct sockaddr_in *) &(iface->ifr_addr);
+ netmask = (struct sockaddr_in *) &(iface->ifr_netmask);
+
+ device->host_ip = g_malloc0 (INET_ADDRSTRLEN);
+
+ if (inet_ntop (AF_INET, &(address->sin_addr),
+ device->host_ip, INET_ADDRSTRLEN) == NULL) {
+
+ __android_log_print (ANDROID_LOG_INFO,
+ "gssdp",
+ "Failed to get ip for: %s, %s",
+ iface->ifr_name,
+ strerror (errno));
+
+ g_free (device->host_ip);
+ device->host_ip = NULL;
+ continue;
+ }
+
+ ip = address->sin_addr.s_addr;
+
+ if (ioctl (sock, SIOCGIFNETMASK, iface) == -1) {
+ __android_log_write (ANDROID_LOG_DEBUG, "gssdp",
+ "Couldn't get netmask. Discarding");
+ g_free (device->host_ip);
+ device->host_ip = NULL;
+ continue;
+ }
+
+ memcpy (&device->mask, netmask, sizeof (struct sockaddr_in));
+
+ if (device->network == NULL) {
+ device->network = g_malloc0 (INET_ADDRSTRLEN);
+
+ net_address.s_addr = ip & netmask->sin_addr.s_addr;
+
+ if (inet_ntop (AF_INET, &net_address,
+ device->network, INET_ADDRSTRLEN) == NULL) {
+
+ __android_log_print (ANDROID_LOG_WARN, "gssdp",
+ "Failed to get nw for: %s, %s",
+ iface->ifr_name, strerror (errno));
+
+ g_free (device->host_ip);
+ device->host_ip = NULL;
+ g_free (device->network);
+ device->network = NULL;
+ continue;
+ }
+ }
+
+ if (!device->iface_name)
+ device->iface_name = g_strdup (iface->ifr_name);
+
+ goto success;
+
+ }
+
+ __android_log_write (ANDROID_LOG_WARN, "gssdp",
+ "Traversed whole list without finding a configured device");
+
+fail:
+ __android_log_write (ANDROID_LOG_WARN,
+ "gssdp",
+ "Failed to get configuration for device");
+ g_free (ifaces);
+ g_list_free (if_list);
+ close (sock);
+ return FALSE;
+success:
+ __android_log_print (ANDROID_LOG_DEBUG, "gssdp",
+ "Returned config params for device: %s ip: %s network: %s",
+ device->iface_name, device->host_ip, device->network);
+ g_free (ifaces);
+ g_list_free (if_list);
+ close (sock);
+ return TRUE;
+}
diff --git a/libgssdp/gssdp-net-posix.c b/libgssdp/gssdp-net-posix.c
new file mode 100644
index 0000000..dd5859e
--- /dev/null
+++ b/libgssdp/gssdp-net-posix.c
@@ -0,0 +1,208 @@
+/*
+ * Copyright (C) 2016 Jens Georg <mail jensge org>
+ *
+ * Author: Jens Georg <mail jensge org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include "gssdp-net.h"
+
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <ifaddrs.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef __linux__
+#include <net/if_arp.h>
+#endif
+
+gboolean
+gssdp_net_init (GError **error)
+{
+ return TRUE;
+}
+
+void
+gssdp_net_shutdown (void)
+{
+}
+
+int
+gssdp_net_query_ifindex (GSSDPNetworkDevice *device)
+{
+#if defined(HAVE_IFNAMETOINDEX)
+ return if_nametoindex (device->iface_name);
+
+#elif defined(HAVE_SIOCGIFINDEX)
+ int fd;
+ int result;
+ struct ifreq ifr;
+
+ fd = socket (AF_INET, SOCK_STREAM, 0);
+ if (fd < 0)
+ return -1;
+
+ memset (&ifr, 0, sizeof(struct ifreq));
+ strncpy (ifr.ifr_ifrn.ifrn_name, device->iface_name, IFNAMSIZ);
+
+ result = ioctl (fd, SIOCGIFINDEX, (char *)&ifr);
+ close (fd);
+
+ if (result == 0)
+ return ifr.ifr_ifindex;
+ else
+ return -1;
+#else
+ return -1;
+#endif
+}
+
+char *
+gssdp_net_arp_lookup (GSSDPNetworkDevice *device, const char *ip_address)
+{
+#if defined(__linux__)
+ struct arpreq req;
+ struct sockaddr_in *sin;
+ int fd = -1;
+
+ memset (&req, 0, sizeof (req));
+
+ /* FIXME: Update when we support IPv6 properly */
+ sin = (struct sockaddr_in *) &req.arp_pa;
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = inet_addr (ip_address);
+
+ /* copy name, leave place for nul terminator */;
+ strncpy (req.arp_dev, device->iface_name, sizeof (req.arp_dev) - 1);
+
+ fd = socket (AF_INET, SOCK_STREAM, 0);
+ if (fd < 0)
+ return g_strdup (ip_address);
+
+ if (ioctl (fd, SIOCGARP, (caddr_t) &req) < 0) {
+ return NULL;
+ }
+ close (fd);
+
+ if (req.arp_flags & ATF_COM) {
+ unsigned char *buf = (unsigned char *) req.arp_ha.sa_data;
+
+ return g_strdup_printf ("%02X:%02X:%02X:%02X:%02X:%02X",
+ buf[0],
+ buf[1],
+ buf[2],
+ buf[3],
+ buf[4],
+ buf[5]);
+ }
+
+ return g_strdup (ip_address);
+#else
+ return g_strdup (ip_address);
+#endif
+}
+
+gboolean
+gssdp_net_get_host_ip (GSSDPNetworkDevice *device)
+{
+ struct ifaddrs *ifa_list, *ifa;
+ GList *up_ifaces, *ifaceptr;
+
+ up_ifaces = NULL;
+
+ if (getifaddrs (&ifa_list) != 0) {
+ g_warning ("Failed to retrieve list of network interfaces: %s",
+ strerror (errno));
+
+ return FALSE;
+ }
+
+ for (ifa = ifa_list; ifa != NULL; ifa = ifa->ifa_next) {
+ if (ifa->ifa_addr == NULL)
+ continue;
+
+ if (device->iface_name &&
+ !g_str_equal (device->iface_name, ifa->ifa_name))
+ continue;
+ else if (!(ifa->ifa_flags & IFF_UP))
+ continue;
+ else if ((ifa->ifa_flags & IFF_POINTOPOINT))
+ continue;
+
+ /* Loopback and IPv6 interfaces go at the bottom on the list */
+ if ((ifa->ifa_flags & IFF_LOOPBACK) ||
+ ifa->ifa_addr->sa_family == AF_INET6)
+ up_ifaces = g_list_append (up_ifaces, ifa);
+ else
+ up_ifaces = g_list_prepend (up_ifaces, ifa);
+ }
+
+ for (ifaceptr = up_ifaces;
+ ifaceptr != NULL;
+ ifaceptr = ifaceptr->next) {
+ char ip[INET6_ADDRSTRLEN];
+ char net[INET6_ADDRSTRLEN];
+ const char *p, *q;
+ struct sockaddr_in *s4, *s4_mask;
+ struct in_addr net_addr;
+ const guint8 *bytes;
+
+ ifa = ifaceptr->data;
+
+ if (ifa->ifa_addr->sa_family != AF_INET) {
+ continue;
+ }
+
+ s4 = (struct sockaddr_in *) ifa->ifa_addr;
+ p = inet_ntop (AF_INET, &s4->sin_addr, ip, sizeof (ip));
+ device->host_ip = g_strdup (p);
+
+ bytes = (const guint8 *) &s4->sin_addr;
+ device->host_addr = g_inet_address_new_from_bytes
+ (bytes, G_SOCKET_FAMILY_IPV4);
+
+ s4_mask = (struct sockaddr_in *) ifa->ifa_netmask;
+ memcpy (&(device->mask), s4_mask, sizeof (struct sockaddr_in));
+ net_addr.s_addr = (in_addr_t) s4->sin_addr.s_addr &
+ (in_addr_t) s4_mask->sin_addr.s_addr;
+ q = inet_ntop (AF_INET, &net_addr, net, sizeof (net));
+
+
+ if (device->iface_name == NULL)
+ device->iface_name = g_strdup (ifa->ifa_name);
+ if (device->network == NULL)
+ device->network = g_strdup (q);
+
+ device->index = gssdp_net_query_ifindex (device);
+ break;
+ }
+
+ g_list_free (up_ifaces);
+ freeifaddrs (ifa_list);
+
+ return TRUE;
+}
diff --git a/libgssdp/gssdp-net-win32.c b/libgssdp/gssdp-net-win32.c
new file mode 100644
index 0000000..df5b861
--- /dev/null
+++ b/libgssdp/gssdp-net-win32.c
@@ -0,0 +1,236 @@
+/*
+ * Copyright (C) 2016 Jens Georg <mail jensge org>
+ *
+ * Author: Jens Georg <mail jensge org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#define _WIN32_WINNT 0x502
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#include <iphlpapi.h>
+typedef int socklen_t;
+/* from the return value of inet_addr */
+
+#include "gssdp-error.h"
+#include "gssdp-net.h"
+
+gboolean
+gssdp_net_init (GError **error)
+{
+ WSADATA wsaData = {0};
+ gchar *message = NULL;
+
+ if (WSAStartup (MAKEWORD (2,2), &wsaData) == 0) {
+ return TRUE;
+ }
+
+
+ message = g_win32_error_message (WSAGetLastError ());
+ g_set_error_literal (error,
+ GSSDP_ERROR,
+ GSSDP_ERROR_FAILED,
+ message);
+ g_free (message);
+
+ return FALSE;
+}
+
+void
+gssdp_net_shutdown (void)
+{
+ WSACleanup ();
+}
+
+static gboolean
+is_primary_adapter (PIP_ADAPTER_ADDRESSES adapter)
+{
+ int family =
+ adapter->FirstUnicastAddress->Address.lpSockaddr->sa_family;
+
+ return !(adapter->IfType == IF_TYPE_SOFTWARE_LOOPBACK ||
+ family == AF_INET6);
+}
+
+static gboolean
+extract_address_and_prefix (PIP_ADAPTER_UNICAST_ADDRESS adapter,
+ PIP_ADAPTER_PREFIX prefix,
+ char *iface,
+ char *network) {
+ DWORD ret = 0;
+ DWORD len = INET6_ADDRSTRLEN;
+
+ ret = WSAAddressToStringA (adapter->Address.lpSockaddr,
+ adapter->Address.iSockaddrLength,
+ NULL,
+ iface,
+ &len);
+ if (ret != 0)
+ return FALSE;
+
+ if (prefix) {
+ ret = WSAAddressToStringA (prefix->Address.lpSockaddr,
+ prefix->Address.iSockaddrLength,
+ NULL,
+ network,
+ &len);
+ if (ret != 0)
+ return FALSE;
+ } else if (strcmp (iface, "127.0.0.1"))
+ strcpy (network, "127.0.0.0");
+ else
+ return FALSE;
+
+ return TRUE;
+}
+
+int
+gssdp_net_query_ifindex (GSSDPNetworkDevice *device)
+{
+ /* TODO: if_nametoindex is supported on Vista or later */
+ return -1;
+}
+
+char *
+gssdp_net_arp_lookup (GSSDPNetworkDevice *device, const char *ip_address)
+{
+ /* TODO: Is there a way to make this work? */
+ /* GetIpNetTable / GetIpNetTable2 for Vista (ipv6) */
+ return g_strdup (ip_address);
+}
+
+gboolean
+gssdp_net_get_host_ip (GSSDPNetworkDevice *device)
+{
+ GList *up_ifaces = NULL, *ifaceptr = NULL;
+ ULONG flags = GAA_FLAG_INCLUDE_PREFIX |
+ GAA_FLAG_SKIP_DNS_SERVER |
+ GAA_FLAG_SKIP_MULTICAST;
+ DWORD size = 15360; /* Use 15k buffer initially as documented in MSDN */
+ DWORD ret;
+ PIP_ADAPTER_ADDRESSES adapters_addresses;
+ PIP_ADAPTER_ADDRESSES adapter;
+
+ do {
+ adapters_addresses = (PIP_ADAPTER_ADDRESSES) g_malloc0 (size);
+ ret = GetAdaptersAddresses (AF_UNSPEC,
+ flags,
+ NULL,
+ adapters_addresses,
+ &size);
+ if (ret == ERROR_BUFFER_OVERFLOW)
+ g_free (adapters_addresses);
+ } while (ret == ERROR_BUFFER_OVERFLOW);
+
+ if (ret == ERROR_SUCCESS)
+ for (adapter = adapters_addresses;
+ adapter != NULL;
+ adapter = adapter->Next) {
+ if (adapter->FirstUnicastAddress == NULL)
+ continue;
+ if (adapter->OperStatus != IfOperStatusUp)
+ continue;
+ /* skip Point-to-Point devices */
+ if (adapter->IfType == IF_TYPE_PPP)
+ continue;
+
+ if (device->iface_name != NULL &&
+ strcmp (device->iface_name, adapter->AdapterName) != 0)
+ continue;
+
+ /* I think that IPv6 is done via pseudo-adapters, so
+ * that there are either IPv4 or IPv6 addresses defined
+ * on the adapter.
+ * Loopback-Devices and IPv6 go to the end of the list,
+ * IPv4 to the front
+ */
+ if (is_primary_adapter (adapter))
+ up_ifaces = g_list_prepend (up_ifaces, adapter);
+ else
+ up_ifaces = g_list_append (up_ifaces, adapter);
+ }
+
+ for (ifaceptr = up_ifaces;
+ ifaceptr != NULL;
+ ifaceptr = ifaceptr->next) {
+ char ip[INET6_ADDRSTRLEN];
+ char prefix[INET6_ADDRSTRLEN];
+ const char *p, *q;
+ PIP_ADAPTER_UNICAST_ADDRESS address;
+ PIP_ADAPTER_PREFIX address_prefix;
+
+ p = NULL;
+
+ adapter = (PIP_ADAPTER_ADDRESSES) ifaceptr->data;
+
+ for (address_prefix = adapter->FirstPrefix;
+ address_prefix != NULL;
+ address_prefix = address_prefix->Next)
+ if (address_prefix->Address.lpSockaddr->sa_family == AF_INET)
+ break;
+
+ if (address_prefix == NULL)
+ continue;
+
+ for (address = adapter->FirstUnicastAddress;
+ address != NULL;
+ address = address->Next) {
+ if (address->Address.lpSockaddr->sa_family != AF_INET)
+ continue;
+
+ if (extract_address_and_prefix (address,
+ address_prefix,
+ ip,
+ prefix)) {
+ p = ip;
+ q = prefix;
+ }
+
+ if (p != NULL) {
+ gint32 mask = 0;
+
+ device->host_ip = g_strdup (p);
+ /* This relies on the compiler doing an arithmetic
+ * shift here!
+ */
+ if (address_prefix->PrefixLength > 0) {
+ mask = (gint32) 0x80000000;
+ mask >>= address_prefix->PrefixLength - 1;
+ }
+ device->mask.sin_family = AF_INET;
+ device->mask.sin_port = 0;
+ device->mask.sin_addr.s_addr = htonl ((guint32) mask);
+
+ if (device->iface_name == NULL)
+ device->iface_name = g_strdup (adapter->AdapterName);
+ if (device->network == NULL)
+ device->network = g_strdup (q);
+
+ device->index = gssdp_net_query_ifindex (device);
+ break;
+ }
+ }
+
+ if (p != NULL)
+ break;
+
+ }
+ g_list_free (up_ifaces);
+ g_free (adapters_addresses);
+
+ return TRUE;
+}
diff --git a/libgssdp/gssdp-net.h b/libgssdp/gssdp-net.h
new file mode 100644
index 0000000..02f2901
--- /dev/null
+++ b/libgssdp/gssdp-net.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2016 Jens Georg <mail jensge org>
+ *
+ * Author: Jens Georg <mail jensge org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef GSSDP_NET_H
+#define GSSDP_NET_H
+
+#ifndef INET6_ADDRSTRLEN
+#define INET6_ADDRSTRLEN 46
+#endif
+
+#include <glib.h>
+#include <gio/gio.h>
+
+#ifdef G_OS_WIN32
+#include <winsock2.h>
+typedef unsigned long in_addr_t;
+#else
+#include <netinet/in.h>
+#endif
+
+struct _GSSDPNetworkDevice {
+ char *iface_name;
+ char *host_ip;
+ GInetAddress *host_addr;
+ char *network;
+ struct sockaddr_in mask;
+ gint index;
+};
+typedef struct _GSSDPNetworkDevice GSSDPNetworkDevice;
+
+G_GNUC_INTERNAL gboolean
+gssdp_net_init (GError **error);
+
+G_GNUC_INTERNAL void
+gssdp_net_shutdown (void);
+
+G_GNUC_INTERNAL gboolean
+gssdp_net_get_host_ip (GSSDPNetworkDevice *device);
+
+G_GNUC_INTERNAL int
+gssdp_net_query_ifindex (GSSDPNetworkDevice *device);
+
+G_GNUC_INTERNAL char*
+gssdp_net_arp_lookup (GSSDPNetworkDevice *device,
+ const char *ip_address);
+
+#endif /* GSSDP_NET_H */
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