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wlandebug(8): allow fallback to old behavior + improve name checks.

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- Treat passed interface name as original if ifconfig_get_orig_name() fails.
- Reject interface name if it does not start from "wlan".
This commit is contained in:
Andriy Voskoboinyk 2017-11-19 20:13:11 +00:00
parent d12546572d
commit e989c74331
1 changed files with 8 additions and 4 deletions
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12
usr.sbin/wlandebug/wlandebug.c
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@ -169,15 +169,19 @@ get_orig_iface_name(char *oid, size_t oid_size, char *name)
char *orig_name;
h = ifconfig_open();
if (ifconfig_get_orig_name(h, name, &orig_name) < 0)
errc(1, ifconfig_err_errno(h), "cannot get interface name");
if (ifconfig_get_orig_name(h, name, &orig_name) < 0) {
/* check for original interface name. */
orig_name = name;
}
if (strlen(orig_name) < strlen("wlan") + 1)
if (strlen(orig_name) < strlen("wlan") + 1 ||
strncmp(orig_name, "wlan", 4) != 0)
errx(1, "expecting a wlan interface name");
ifconfig_close(h);
setoid(oid, oid_size, orig_name);
free(orig_name);
if (orig_name != name)
free(orig_name);
}
int