archkfreebsd.c

   1 #define _GNU_SOURCE
   2
   3 #include <stdio.h>
   4 #include <strings.h>
   5 #include <err.h>
   6 #include <fnmatch.h>
   7 #include <net/if.h>
   8 #include <net/if_dl.h>
   9
  10 #include "archcommon.h"
  11
  12 static bool match_mac(const char *iface, const char *pattern) {
  13         for (struct ifaddrs *ifa = ifap; ifa; ifa = ifa->ifa_next) {
  14                 if (ifa->ifa_addr->sa_family != AF_LINK)
  15                         continue;
  16
  17                 struct sockaddr_dl *dl = (struct sockaddr_dl *)ifa->ifa_addr;
  18                 if (dl->sdl_alen != 6)
  19                         continue;
  20
  21                 if (strcmp(ifa->ifa_name, iface))
  22                         continue;
  23
  24                 unsigned char *ll = (unsigned char *)LLADDR(dl);
  25                 char buf[18];
  26                 snprintf(buf, sizeof buf, "%02x:%02x:%02x:%02x:%02x:%02x", ll[0], ll[1], ll[2], ll[3], ll[4], ll[5]);
  27                 return fnmatch(pattern, buf, FNM_EXTMATCH) == 0;
  28         }
  29
  30         return false;
  31 }
  32
  33 bool variable_match(const char *iface, const char *variable, const char *pattern) {
  34         if (!strcasecmp(variable, "mac"))
  35                 return match_mac(iface, pattern);
  36
  37         if (!strcasecmp(variable, "name"))
  38                 return fnmatch(pattern, iface, FNM_EXTMATCH) == 0;
  39
  40         warnx("Unknown or unsupported pattern variable %s", variable);
  41         return false;
  42 }