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iptunnel: share common code when determining the default interface name 

Signed-off-by: Phil Sutter <phil@nwl.cc>
This commit is contained in:
Phil Sutter 2015-11-13 18:09:03 +01:00 committed by Stephen Hemminger
parent 0dd4d2b37f
commit c957821b18
1 changed files with 25 additions and 45 deletions
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70
ip/iptunnel.c
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@ -239,10 +239,26 @@ static int parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
return 0;
}
static const char *tnl_defname(const struct ip_tunnel_parm *p)
{
switch (p->iph.protocol) {
case IPPROTO_IPIP:
if (p->i_flags & VTI_ISVTI)
return "ip_vti0";
else
return "tunl0";
case IPPROTO_GRE:
return "gre0";
case IPPROTO_IPV6:
return "sit0";
}
return NULL;
}
static int do_add(int cmd, int argc, char **argv)
{
struct ip_tunnel_parm p;
const char *basedev;
if (parse_args(argc, argv, cmd, &p) < 0)
return -1;
@ -252,21 +268,12 @@ static int do_add(int cmd, int argc, char **argv)
return -1;
}
switch (p.iph.protocol) {
case IPPROTO_IPIP:
if (p.i_flags & VTI_ISVTI)
return tnl_add_ioctl(cmd, "ip_vti0", p.name, &p);
else
return tnl_add_ioctl(cmd, "tunl0", p.name, &p);
case IPPROTO_GRE:
return tnl_add_ioctl(cmd, "gre0", p.name, &p);
case IPPROTO_IPV6:
return tnl_add_ioctl(cmd, "sit0", p.name, &p);
default:
if (!(basedev = tnl_defname(&p))) {
fprintf(stderr, "cannot determine tunnel mode (ipip, gre, vti or sit)\n");
return -1;
}
return -1;
return tnl_add_ioctl(cmd, basedev, p.name, &p);
}
static int do_del(int argc, char **argv)
@ -276,20 +283,7 @@ static int do_del(int argc, char **argv)
if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0)
return -1;
switch (p.iph.protocol) {
case IPPROTO_IPIP:
if (p.i_flags & VTI_ISVTI)
return tnl_del_ioctl("ip_vti0", p.name, &p);
else
return tnl_del_ioctl("tunl0", p.name, &p);
case IPPROTO_GRE:
return tnl_del_ioctl("gre0", p.name, &p);
case IPPROTO_IPV6:
return tnl_del_ioctl("sit0", p.name, &p);
default:
return tnl_del_ioctl(p.name, p.name, &p);
}
return -1;
return tnl_del_ioctl(tnl_defname(&p) ? : p.name, p.name, &p);
}
static void print_tunnel(struct ip_tunnel_parm *p)
@ -462,31 +456,17 @@ static int do_tunnels_list(struct ip_tunnel_parm *p)
static int do_show(int argc, char **argv)
{
int err;
struct ip_tunnel_parm p;
const char *basedev;
ll_init_map(&rth);
if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0)
return -1;
switch (p.iph.protocol) {
case IPPROTO_IPIP:
if (p.i_flags & VTI_ISVTI)
err = tnl_get_ioctl(p.name[0] ? p.name : "ip_vti0", &p);
else
err = tnl_get_ioctl(p.name[0] ? p.name : "tunl0", &p);
break;
case IPPROTO_GRE:
err = tnl_get_ioctl(p.name[0] ? p.name : "gre0", &p);
break;
case IPPROTO_IPV6:
err = tnl_get_ioctl(p.name[0] ? p.name : "sit0", &p);
break;
default:
do_tunnels_list(&p);
return 0;
}
if (err)
if (!(basedev = tnl_defname(&p)))
return do_tunnels_list(&p);
if (tnl_get_ioctl(p.name[0] ? p.name : basedev, &p))
return -1;
print_tunnel(&p);