X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=src%2Ffirst_network_device.c;h=3f34cf2ed1bc031221389278f1d9ccca62d22f4e;hb=62d0905c7f636254161076a835a17e72251f8460;hp=c160027e1e8b98ef931668a2bcfa83d3d4b16a07;hpb=b219f47f394e536198997578e4cce3c539b84b6d;p=i3%2Fi3status

diff --git a/src/first_network_device.c b/src/first_network_device.c
index c160027..3f34cf2 100644
--- a/src/first_network_device.c
+++ b/src/first_network_device.c
@@ -1,39 +1,175 @@
-// vim:ts=8:expandtab
+// vim:ts=4:sw=4:expandtab
+#include <sys/socket.h>
 #include <sys/stat.h>
 #include <stdlib.h>
 #include <ifaddrs.h>
+#ifdef __OpenBSD__
+#include <sys/types.h>
+#include <sys/sockio.h>
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <net80211/ieee80211.h>
+#include <net80211/ieee80211_ioctl.h>
+#endif
 
 #include "i3status.h"
 
-const char *first_eth_interface(const net_type_t type) {
-        static char *interface = NULL;
-        struct ifaddrs *ifaddr, *addrp;
-        struct stat stbuf;
-        static char path[1024];
-
-        getifaddrs(&ifaddr);
-
-        if (ifaddr == NULL)
-                return NULL;
-
-        free(interface);
-        interface = NULL;
-        for (addrp = ifaddr;
-             addrp != NULL;
-             addrp = addrp->ifa_next) {
-                if (strncasecmp("lo", addrp->ifa_name, strlen("lo")) == 0)
-                        continue;
-                // Skip this interface if it is a wireless interface.
-                snprintf(path, sizeof(path), "/sys/class/net/%s/wireless", addrp->ifa_name);
-                const bool is_wireless = (stat(path, &stbuf) == 0);
-                if (( is_wireless && type == NET_TYPE_ETHERNET) ||
-                    (!is_wireless && type == NET_TYPE_WIRELESS))
-                        continue;
-                interface = strdup(addrp->ifa_name);
-                break;
+#ifdef __linux__
+#define LOOPBACK_DEV "lo"
+#else
+#define LOOPBACK_DEV "lo0"
+#endif
+
+static bool sysfs_devtype(char *dest, size_t n, const char *ifnam) {
+    FILE *fp;
+    char buf[1024];
+
+    snprintf(buf, sizeof(buf), "/sys/class/net/%s/uevent", ifnam);
+    if ((fp = fopen(buf, "r")) == NULL)
+        return false;
+
+    dest[0] = '\0';
+
+    while (fgets(buf, sizeof(buf), fp)) {
+        size_t slen;
+        char *s;
+
+        slen = strlen(buf);
+        /* Line is too long to fit in the buffer */
+        if (buf[slen - 1] != '\n' && !feof(fp))
+            break;
+        if ((s = strchr(buf, '='))) {
+            if (strncmp(buf, "DEVTYPE", s - buf))
+                continue;
+            buf[slen - 1] = '\0';
+            strncpy(dest, ++s, n);
+            break;
         }
+    }
+    fclose(fp);
+    return true;
+}
+
+static bool is_virtual(const char *ifname) {
+    char path[1024];
+    char *target = NULL;
+    bool is_virtual = false;
+
+    snprintf(path, sizeof(path), "/sys/class/net/%s", ifname);
+    if ((target = realpath(path, NULL))) {
+        if (BEGINS_WITH(target, "/sys/devices/virtual/")) {
+            is_virtual = true;
+        }
+    }
+
+    free(target);
+    return is_virtual;
+}
+
+static net_type_t iface_type(const char *ifname) {
+#ifdef __linux__
+    char devtype[32];
+
+    if (!sysfs_devtype(devtype, sizeof(devtype), ifname))
+        return NET_TYPE_OTHER;
+
+    /* Default to Ethernet when no devtype is available */
+    if (!devtype[0])
+        return NET_TYPE_ETHERNET;
 
-        freeifaddrs(ifaddr);
-        return interface;
+    if (strcmp(devtype, "wlan") == 0)
+        return NET_TYPE_WIRELESS;
+
+    if (strcmp(devtype, "wwan") == 0)
+        return NET_TYPE_OTHER;
+
+    return NET_TYPE_OTHER;
+#elif __OpenBSD__
+    /*
+     *First determine if the device is a wireless device by trying two ioctl(2)
+     * commands against it. If either succeeds we can be sure it's a wireless
+     * device.
+     * Otherwise we try another ioctl(2) to determine the interface media. If that
+     * fails it's not an ethernet device eiter.
+     */
+    struct ifreq ifr;
+    struct ieee80211_bssid bssid;
+    struct ieee80211_nwid nwid;
+    struct ifmediareq ifmr;
+
+    int s, ibssid, inwid;
+
+    if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
+        return NET_TYPE_OTHER;
+
+    memset(&ifr, 0, sizeof(ifr));
+    ifr.ifr_data = (caddr_t)&nwid;
+    (void)strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
+    inwid = ioctl(s, SIOCG80211NWID, (caddr_t)&ifr);
+
+    memset(&bssid, 0, sizeof(bssid));
+    strlcpy(bssid.i_name, ifname, sizeof(bssid.i_name));
+    ibssid = ioctl(s, SIOCG80211BSSID, &bssid);
+
+    if (ibssid == 0 || inwid == 0) {
+        close(s);
+        return NET_TYPE_WIRELESS;
+    }
+
+    (void)memset(&ifmr, 0, sizeof(ifmr));
+    (void)strlcpy(ifmr.ifm_name, ifname, sizeof(ifmr.ifm_name));
+
+    if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
+        close(s);
+        return NET_TYPE_OTHER;
+    } else {
+        close(s);
+        return NET_TYPE_ETHERNET;
+    }
+#else
+#error Missing implementation to determine interface type.
+#endif
 }
 
+const char *first_eth_interface(const net_type_t type) {
+    static char *interface = NULL;
+    struct ifaddrs *ifaddr, *addrp;
+    net_type_t iftype;
+
+    getifaddrs(&ifaddr);
+
+    if (ifaddr == NULL)
+        return NULL;
+
+    free(interface);
+    interface = NULL;
+    for (addrp = ifaddr;
+         addrp != NULL;
+         addrp = addrp->ifa_next) {
+        if (strncasecmp(LOOPBACK_DEV, addrp->ifa_name, strlen(LOOPBACK_DEV)) == 0)
+            continue;
+        if (addrp->ifa_addr == NULL)
+            continue;
+#ifdef __OpenBSD__
+        if (addrp->ifa_addr->sa_family != AF_LINK)
+            continue;
+#else
+        // Skip PF_PACKET addresses (MAC addresses), as they are present on any
+        // ethernet interface.
+        if (addrp->ifa_addr->sa_family != AF_INET &&
+            addrp->ifa_addr->sa_family != AF_INET6)
+            continue;
+#endif /* !__OpenBSD__ */
+        // Skip this interface if it is a wireless interface.
+        iftype = iface_type(addrp->ifa_name);
+        if (iftype != type)
+            continue;
+        if (is_virtual(addrp->ifa_name))
+            continue;
+        interface = strdup(addrp->ifa_name);
+        break;
+    }
+
+    freeifaddrs(ifaddr);
+    return interface;
+}