ask the kernel the list of network devices instead of manually probing

everything (this enable to handle more than 4 ethernet cards)

1 files changed, 33 insertions, 12 deletions

diff --git a/perl-install/c/stuff.xs.pl b/perl-install/c/stuff.xs.pl
index ca73bfb65..422c96069 100644
--- a/perl-install/c/stuff.xs.pl
+++ b/perl-install/c/stuff.xs.pl
@@ -395,20 +395,41 @@ usb_probe()
 unsigned int
 getpagesize()
 
-int
-hasNetDevice(device)
-  char * device
-  CODE:
-    struct ifreq req;
-    int s = socket(AF_INET, SOCK_DGRAM, 0);
-    if (s == -1) { RETVAL = 0; return; }
+void
+getNetInterfaces()
+  PPCODE:
+    struct ifconf ifc;
+    struct ifreq *ifr;
+    int fd, n;
+    
+    if ((fd = socket (PF_INET, SOCK_DGRAM, 0)) == -1) {
+         perror("getNetInterfaces() >> creating socket");
+         XSRETURN_EMPTY;
+    }
 
-    strcpy(req.ifr_name, device);
+    // SIOCGIFCOUNT is unimplemented, let\'s call SIOCGIFCONF(0) to get number of interfaces
+    ifc.ifc_len = 0; ifc.ifc_buf = NULL; ifc.ifc_req = NULL;
+    if (ioctl (fd, SIOCGIFCONF, &ifc) == -1) {
+         perror("getNetInterfaces() >> SIOCGIFCONF(0)");
+         XSRETURN_EMPTY;
+    }
+
+    // allocate enough space
+    n = ifc.ifc_len / sizeof (struct ifreq);
+    New (0xbad, ifr, ifc.ifc_len, struct ifreq);
+
+    // Get the network interfaces list
+    ifc.ifc_req = ifr;
+    if (ioctl (fd, SIOCGIFCONF, &ifc) == -1) {
+         perror("getNetInterfaces() >> SIOCGIFCONF()");
+         XSRETURN_EMPTY;
+    }
+
+    EXTEND(SP, n);
+    for (; n; --n, ++ifr)
+         PUSHs(sv_2mortal(newSVpv(ifr->ifr_name, 0)));
+    Safefree (ifc.ifc_req);
 
-    RETVAL = ioctl(s, SIOCGIFFLAGS, &req) == 0;
-    close(s);
-  OUTPUT:
-  RETVAL
 
 int
 addDefaultRoute(gateway)