Revision 91ca60e0

b/net/tap-linux.c
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#include "qemu-common.h"
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#include "qemu-error.h"
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#define PATH_NET_TUN "/dev/net/tun"


  		





  
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int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required)


  		





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{


  		





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    struct ifreq ifr;


  		





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    int fd, ret;


  		





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    TFR(fd = open("/dev/net/tun", O_RDWR));


  		





  
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    TFR(fd = open(PATH_NET_TUN, O_RDWR));


  		





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    if (fd < 0) {


  		





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        fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");


  		





  
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        error_report("could not open %s: %m", PATH_NET_TUN);


  		





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        return -1;


  		





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    }


  		





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    memset(&ifr, 0, sizeof(ifr));


  		





  ......




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        pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");


  		





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    ret = ioctl(fd, TUNSETIFF, (void *) &ifr);


  		





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    if (ret != 0) {


  		





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        fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");


  		





  
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        error_report("could not configure %s (%s): %m", PATH_NET_TUN, ifr.ifr_name);


  		





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        close(fd);


  		





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        return -1;


  		





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    }


  		












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