get_interface_type() contains no GUI code, so just move it up to

capture_ifinfo.c.

svn path=/trunk/; revision=43532

1 files changed, 124 insertions, 0 deletions

diff --git a/capture_ifinfo.c b/capture_ifinfo.c
index be57f02ebd..8b18346771 100644
--- a/capture_ifinfo.c
+++ b/capture_ifinfo.c
@@ -336,4 +336,128 @@ void add_interface_to_remote_list(if_info_t *if_info)
     remote_interface_list = g_list_append(remote_interface_list, temp);
 }
 #endif
+
+guint
+get_interface_type(gchar *name, gchar *description)
+{
+#if defined(__linux__)
+    ws_statb64 statb;
+    char *wireless_path;
+#endif
+#if defined(_WIN32)
+    /*
+     * Much digging failed to reveal any obvious way to get something such
+     * as the SNMP MIB-II ifType value for an interface:
+     *
+     *    http://www.iana.org/assignments/ianaiftype-mib
+     *
+     * by making some NDIS request.
+     */
+    if (description && (strstr(description,"generic dialup") != NULL ||
+            strstr(description,"PPP/SLIP") != NULL )) {
+        return IF_DIALUP;
+    } else if (description && (strstr(description,"Wireless") != NULL ||
+            strstr(description,"802.11") != NULL)) {
+        return IF_WIRELESS;
+    } else if (description && strstr(description,"AirPcap") != NULL ||
+            strstr(name,"airpcap")) {
+        return IF_AIRPCAP;
+    } else if (description && strstr(description, "Bluetooth") != NULL ) {
+        return IF_BLUETOOTH;
+    }
+#elif defined(__APPLE__)
+    /*
+     * XXX - yes, fetching all the network addresses for an interface
+     * gets you an AF_LINK address, of type "struct sockaddr_dl", and,
+     * yes, that includes an SNMP MIB-II ifType value.
+     *
+     * However, it's IFT_ETHER, i.e. Ethernet, for AirPort interfaces,
+     * not IFT_IEEE80211 (which isn't defined in OS X in any case).
+     *
+     * Perhaps some other BSD-flavored OSes won't make this mistake;
+     * however, FreeBSD 7.0 and OpenBSD 4.2, at least, appear to have
+     * made the same mistake, at least for my Belkin ZyDAS stick.
+     *
+     * XXX - this is wrong on a MacBook Air, as en0 is the AirPort
+     * interface, and it's also wrong on a Mac that has no AirPort
+     * interfaces and has multiple Ethernet interfaces.
+     *
+     * The SystemConfiguration framework is your friend here.
+     * SCNetworkInterfaceGetInterfaceType() will get the interface
+     * type.  SCNetworkInterfaceCopyAll() gets all network-capable
+     * interfaces on the system; SCNetworkInterfaceGetBSDName()
+     * gets the "BSD name" of the interface, so we look for
+     * an interface with the specified "BSD name" and get its
+     * interface type.  The interface type is a CFString, and:
+     *
+     *    kSCNetworkInterfaceTypeIEEE80211 means IF_WIRELESS;
+     *    kSCNetworkInterfaceTypeBluetooth means IF_BLUETOOTH;
+     *    kSCNetworkInterfaceTypeModem or
+     *    kSCNetworkInterfaceTypePPP or
+     *    maybe kSCNetworkInterfaceTypeWWAN means IF_DIALUP
+     */
+    if (strcmp(name, "en1") == 0) {
+        return IF_WIRELESS;
+    }
+    /*
+     * XXX - PPP devices have names beginning with "ppp" and an IFT_ of
+     * IFT_PPP, but they could be dial-up, or PPPoE, or mobile phone modem,
+     * or VPN, or... devices.  One might have to dive into the bowels of
+     * IOKit to find out.
+     */
+
+    /*
+     * XXX - there's currently no support for raw Bluetooth capture,
+     * and IP-over-Bluetooth devices just look like fake Ethernet
+     * devices.  There's also Bluetooth modem support, but that'll
+     * probably just give you a device that looks like a PPP device.
+     */
+#elif defined(__linux__)
+    /*
+     * Look for /sys/class/net/{device}/wireless.
+     */
+    wireless_path = g_strdup_printf("/sys/class/net/%s/wireless", name);
+    if (wireless_path != NULL) {
+        if (ws_stat64(wireless_path, &statb) == 0) {
+            g_free(wireless_path);
+            return IF_WIRELESS;
+        }
+    }
+    /*
+     * Bluetooth devices.
+     *
+     * XXX - this is for raw Bluetooth capture; what about IP-over-Bluetooth
+     * devices?
+     */
+    if ( strstr(name,"bluetooth") != NULL) {
+        return IF_BLUETOOTH;
+    }
+
+    /*
+     * USB devices.
+     */
+    if ( strstr(name,"usbmon") != NULL ) {
+        return IF_USB;
+    }
+#endif
+    /*
+     * Bridge, NAT, or host-only interfaces on VMWare hosts have the name
+     * vmnet[0-9]+ or VMnet[0-9+ on Windows. Guests might use a native
+     * (LANCE or E1000) driver or the vmxnet driver. These devices have an
+     * IFT_ of IFT_ETHER, so we have to check the name.
+     */
+    if ( g_ascii_strncasecmp(name, "vmnet", 5) == 0) {
+        return IF_VIRTUAL;
+    }
+
+    if ( g_ascii_strncasecmp(name, "vmxnet", 6) == 0) {
+        return IF_VIRTUAL;
+    }
+
+    if (description && strstr(description, "VMware") != NULL ) {
+        return IF_VIRTUAL;
+    }
+
+    return IF_WIRED;
+}
 #endif /* HAVE_LIBPCAP */