src/f_link.c

   1 /*
   2  * src/f_link.c         Link Filter
   3  *
   4  *      This library is free software; you can redistribute it and/or
   5  *      modify it under the terms of the GNU Lesser General Public
   6  *      License as published by the Free Software Foundation version 2.1
   7  *      of the License.
   8  *
   9  * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch>
  10  */
  11
  12 #include <linux/if.h>
  13
  14 static void get_filter(struct rtnl_link *l, int ac, char **av, int idx,
  15                        struct nl_cache *cache)
  16 {
  17         while (ac > idx) {
  18                 if (!strcasecmp(av[idx], "dev")) {
  19                         if (ac > ++idx) {
  20                                 int ifindex = rtnl_link_name2i(cache, av[idx++]);
  21                                 if (ifindex == RTNL_LINK_NOT_FOUND)
  22                                         goto err_notfound;
  23                                 rtnl_link_set_ifindex(l, ifindex);
  24                         }
  25                 } else if (!strcasecmp(av[idx], "mtu")) {
  26                         if (ac > ++idx)
  27                                 rtnl_link_set_mtu(l, strtoul(av[idx++], NULL, 0));
  28                 } else if (!strcasecmp(av[idx], "txqlen")) {
  29                         if (ac > ++idx)
  30                                 rtnl_link_set_txqlen(l, strtoul(av[idx++], NULL, 0));
  31                 } else if (!strcasecmp(av[idx], "weight")) {
  32                         if (ac > ++idx)
  33                                 rtnl_link_set_weight(l, strtoul(av[idx++], NULL, 0));
  34                 } else if (!strcasecmp(av[idx], "link")) {
  35                         if (ac > ++idx) {
  36                                 int ifindex = rtnl_link_name2i(cache, av[idx++]);
  37                                 if (ifindex == RTNL_LINK_NOT_FOUND)
  38                                         goto err_notfound;
  39                                 rtnl_link_set_link(l, ifindex);
  40                         }
  41                 } else if (!strcasecmp(av[idx], "master")) {
  42                         if (ac > ++idx) {
  43                                 int ifindex = rtnl_link_name2i(cache, av[idx++]);
  44                                 if (ifindex == RTNL_LINK_NOT_FOUND)
  45                                         goto err_notfound;
  46                                 rtnl_link_set_master(l, ifindex);
  47                         }
  48                 } else if (!strcasecmp(av[idx], "qdisc")) {
  49                         if (ac > ++idx)
  50                                 rtnl_link_set_qdisc(l, av[idx++]);
  51                 } else if (!strcasecmp(av[idx], "name")) {
  52                         if (ac > ++idx)
  53                                 rtnl_link_set_name(l, av[idx++]);
  54                 } else if (!strcasecmp(av[idx], "addr")) {
  55                         if (ac > ++idx) {
  56                                 struct nl_addr *a = nl_addr_parse(av[idx++], AF_UNSPEC);
  57                                 if (a == NULL)
  58                                         goto err;
  59                                 rtnl_link_set_addr(l, a);
  60                                 nl_addr_put(a);
  61                         }
  62                 } else if (!strcasecmp(av[idx], "broadcast")) {
  63                         if (ac > ++idx) {
  64                                 struct nl_addr *a = nl_addr_parse(av[idx++], AF_UNSPEC);
  65                                 if (a == NULL)
  66                                         goto err;
  67                                 rtnl_link_set_broadcast(l, a);
  68                                 nl_addr_put(a);
  69                         }
  70                 }
  71 #define MFLAG(STR, FLAG) \
  72         else if (!strcasecmp(av[idx], STR)) { \
  73                 rtnl_link_set_flags(l, FLAG); idx++; }
  74 #define MNOFLAG(STR, FLAG) \
  75         else if (!strcasecmp(av[idx], STR)) { \
  76                 rtnl_link_unset_flags(l, FLAG); idx++; }
  77
  78                 MFLAG("up", IFF_UP)
  79                 MNOFLAG("down", IFF_UP)
  80                 MFLAG("noarp", IFF_NOARP)
  81                 MNOFLAG("arp", IFF_NOARP)
  82                 MFLAG("promisc", IFF_PROMISC)
  83                 MNOFLAG("nopromisc", IFF_PROMISC)
  84                 MFLAG("dynamic", IFF_DYNAMIC)
  85                 MNOFLAG("nodynamic", IFF_DYNAMIC)
  86                 MFLAG("multicast", IFF_MULTICAST)
  87                 MNOFLAG("nomulticast", IFF_MULTICAST)
  88                 MFLAG("allmulticast", IFF_ALLMULTI)
  89                 MNOFLAG("noallmulticast", IFF_ALLMULTI)
  90 #undef MFLAG
  91 #undef MNOFLAG
  92                 else {
  93                         fprintf(stderr, "What is '%s'?\n", av[idx]);
  94                         exit(1);
  95                 }
  96         }
  97
  98         return;
  99
 100 err_notfound:
 101         fprintf(stderr, "Unknown link %s\n", av[idx-1]);
 102         exit(1);
 103 err:
 104         fprintf(stderr, "%s\n", nl_geterror());
 105         exit(1);
 106 }