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032fc7a937
hooking together multiple qemu instances into a single virtual network without needing root access. It can also be used for tunneling or other network simulation tasks. PR: ports/76874 Submitted by: Craig Boston <craig@yekse.gank.org>
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
--- vdetaplib/test.c Sat Jan 29 15:02:08 2005
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+++ vdetaplib/test.c Sun Jan 30 12:27:35 2005
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@@ -6,35 +6,28 @@
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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+#include <sys/types.h>
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#include <sys/ioctl.h>
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+#include <sys/socket.h>
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#include <net/if.h>
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-#include <linux/if_tun.h>
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+#include <net/if_tun.h>
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static int tun_alloc(char *dev)
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{
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- struct ifreq ifr;
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+ struct ifstat ifs;
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int fd, err;
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- if( (fd = open("/dev/net/tun", O_RDWR)) < 0 )
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+ if( (fd = open("/dev/tap", O_RDWR)) < 0 )
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return (-1);
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- memset(&ifr, 0, sizeof(ifr));
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+ memset(&ifs, 0, sizeof(ifs));
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- /* Flags: IFF_TUN - TUN device (no Ethernet headers)
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- * IFF_TAP - TAP device
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- *
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- * IFF_NO_PI - Do not provide packet information
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- */
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- ifr.ifr_flags = IFF_TAP;
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- if( *dev )
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- strncpy(ifr.ifr_name, dev, IFNAMSIZ);
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-
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- if( (err = ioctl(fd, TUNSETIFF, (void *) &ifr)) < 0 ){
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+ if( (err = ioctl(fd, SIOCGIFSTATUS, (void *) &ifs)) < 0 ){
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close(fd);
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return err;
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}
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printf("ioctl returns\n");
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- strcpy(dev, ifr.ifr_name);
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+ puts(ifs.ascii);
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printf("ioctl idev\n");
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return fd;
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}
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