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sgsnemu: use real tun device name after the device is up.

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The device name option could be empty, using it without checking
would crash sgsnemu. Using the real device is better anyway.

Change-Id: Ic3934281bfc2e433323e4ab72cf5be2cbd1c962a
This commit is contained in:
Dmitri Kalashnik
2020-04-28 13:10:56 +04:00
parent 04715d284f
commit db98f309a9
1 changed files with 4 additions and 4 deletions
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8
sgsnemu/sgsnemu.c
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@@ -1928,11 +1928,11 @@ int main(int argc, char **argv)
we don't need it. Don't exit on error since this sysctl is
only available starting with linux 4.11. */
snprintf(buf, sizeof(buf), "%u", IN6_ADDR_GEN_MODE_NONE);
if (proc_ipv6_conf_write(options.tun_dev_name, "addr_gen_mode", buf) < 0) {
if (proc_ipv6_conf_write(tun->devname, "addr_gen_mode", buf) < 0) {
SYS_ERR(DSGSN, LOGL_ERROR, errno,
"Failed to disable addr_gen_mode on %s, an extra link-local "
"ip address will appear on the tun device.\n",
options.tun_dev_name);
tun->devname);
}
#endif
@@ -1940,9 +1940,9 @@ int main(int argc, char **argv)
if (tun->fd > maxfd)
maxfd = tun->fd;
if (proc_ipv6_conf_write(options.tun_dev_name, "accept_ra", "0") < 0) {
if (proc_ipv6_conf_write(tun->devname, "accept_ra", "0") < 0) {
SYS_ERR(DSGSN, LOGL_ERROR, 0,
"Failed to disable IPv6 SLAAC on %s\n", options.tun_dev_name);
"Failed to disable IPv6 SLAAC on %s\n", tun->devname);
exit(1);
}
}