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#define _GNU_SOURCE
#include <stdio.h>
#include <strings.h>
#include <err.h>
#include <fnmatch.h>
#include <net/if.h>
#include <net/if_dl.h>
#include "archcommon.h"
static bool match_mac(const char *iface, const char *pattern) {
for (struct ifaddrs *ifa = ifap; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family != AF_LINK)
continue;
struct sockaddr_dl *dl = (struct sockaddr_dl *)ifa->ifa_addr;
if (dl->sdl_alen != 6)
continue;
if (strcmp(ifa->ifa_name, iface))
continue;
unsigned char *ll = (unsigned char *)LLADDR(dl);
char buf[18];
snprintf(buf, sizeof buf, "%02x:%02x:%02x:%02x:%02x:%02x", ll[0], ll[1], ll[2], ll[3], ll[4], ll[5]);
return fnmatch(pattern, buf, FNM_EXTMATCH) == 0;
}
return false;
}
bool variable_match(const char *iface, const char *variable, const char *pattern) {
if (!strcasecmp(variable, "mac"))
return match_mac(iface, pattern);
if (!strcasecmp(variable, "name"))
return fnmatch(pattern, iface, FNM_EXTMATCH) == 0;
warnx("Unknown or unsupported pattern variable %s", variable);
return false;
}
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