interface.c

   1 #include <linux/nl80211.h>
   2 #include <net/if.h>
   3 #include <errno.h>
   4 #include <string.h>
   5
   6 #include <netlink/genl/genl.h>
   7 #include <netlink/genl/family.h>
   8 #include <netlink/genl/ctrl.h>
   9 #include <netlink/msg.h>
  10 #include <netlink/attr.h>
  11
  12 #include "iw.h"
  13
  14 /* return 0 if not found, 1 if ok, -1 on error */
  15 static int get_if_type(int *argc, char ***argv, enum nl80211_iftype *type)
  16 {
  17         char *tpstr;
  18
  19         if (*argc < 2)
  20                 return 0;
  21
  22         if (strcmp((*argv)[0], "type"))
  23                 return 0;
  24
  25         tpstr = (*argv)[1];
  26         *argc -= 2;
  27         *argv += 2;
  28
  29         if (strcmp(tpstr, "adhoc") == 0 ||
  30             strcmp(tpstr, "ibss") == 0) {
  31                 *type = NL80211_IFTYPE_ADHOC;
  32                 return 1;
  33         } else if (strcmp(tpstr, "monitor") == 0) {
  34                 *type = NL80211_IFTYPE_MONITOR;
  35                 return 1;
  36         } else if (strcmp(tpstr, "__ap") == 0) {
  37                 *type = NL80211_IFTYPE_AP;
  38                 return 1;
  39         } else if (strcmp(tpstr, "__ap_vlan") == 0) {
  40                 *type = NL80211_IFTYPE_AP_VLAN;
  41                 return 1;
  42         } else if (strcmp(tpstr, "wds") == 0) {
  43                 *type = NL80211_IFTYPE_WDS;
  44                 return 1;
  45         } else if (strcmp(tpstr, "station") == 0) {
  46                 *type = NL80211_IFTYPE_STATION;
  47                 return 1;
  48         } else if (strcmp(tpstr, "mp") == 0 ||
  49                         strcmp(tpstr, "mesh") == 0) {
  50                 *type = NL80211_IFTYPE_MESH_POINT;
  51                 return 1;
  52         }
  53
  54
  55         fprintf(stderr, "invalid interface type %s\n", tpstr);
  56         return -1;
  57 }
  58
  59 static int handle_interface_add(struct nl_cb *cb,
  60                                 struct nl_msg *msg,
  61                                 int argc, char **argv)
  62 {
  63         char *name;
  64         char *mesh_id = NULL;
  65         enum nl80211_iftype type;
  66         int tpset;
  67
  68         if (argc < 1)
  69                 return 1;
  70
  71         name = argv[0];
  72         argc--;
  73         argv++;
  74
  75         tpset = get_if_type(&argc, &argv, &type);
  76         if (tpset <= 0)
  77                 return 1;
  78
  79         if (argc) {
  80                 if (strcmp(argv[0], "mesh_id") != 0)
  81                         return 1;
  82                 argc--;
  83                 argv++;
  84
  85                 if (!argc)
  86                         return 1;
  87                 mesh_id = argv[0];
  88                 argc--;
  89                 argv++;
  90         }
  91
  92         if (argc)
  93                 return 1;
  94
  95         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, name);
  96         if (tpset)
  97                 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, type);
  98         if (mesh_id)
  99                 NLA_PUT(msg, NL80211_ATTR_MESH_ID, strlen(mesh_id), mesh_id);
 100
 101         return 0;
 102  nla_put_failure:
 103         return -ENOBUFS;
 104 }
 105 COMMAND(interface, add, "<name> type <type> [mesh_id <meshid>]",
 106         NL80211_CMD_NEW_INTERFACE, 0, CIB_PHY, handle_interface_add);
 107 COMMAND(interface, add, "<name> type <type> [mesh_id <meshid>]",
 108         NL80211_CMD_NEW_INTERFACE, 0, CIB_NETDEV, handle_interface_add);
 109
 110 static int handle_interface_del(struct nl_cb *cb,
 111                                 struct nl_msg *msg,
 112                                 int argc, char **argv)
 113 {
 114         return 0;
 115 }
 116 TOPLEVEL(del, NULL, NL80211_CMD_DEL_INTERFACE, 0, CIB_NETDEV, handle_interface_del);
 117
 118 static int print_iface_handler(struct nl_msg *msg, void *arg)
 119 {
 120         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 121         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
 122
 123         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 124                   genlmsg_attrlen(gnlh, 0), NULL);
 125
 126         if (tb_msg[NL80211_ATTR_IFNAME])
 127                 printf("Interface %s\n", nla_get_string(tb_msg[NL80211_ATTR_IFNAME]));
 128         if (tb_msg[NL80211_ATTR_IFINDEX])
 129                 printf("\tifindex %d\n", nla_get_u32(tb_msg[NL80211_ATTR_IFINDEX]));
 130         if (tb_msg[NL80211_ATTR_IFTYPE])
 131                 printf("\ttype %s\n", iftype_name(nla_get_u32(tb_msg[NL80211_ATTR_IFTYPE])));
 132
 133         return NL_SKIP;
 134 }
 135
 136 static int handle_interface_info(struct nl_cb *cb,
 137                                  struct nl_msg *msg,
 138                                  int argc, char **argv)
 139 {
 140         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_iface_handler, NULL);
 141         return 0;
 142 }
 143 TOPLEVEL(info, NULL, NL80211_CMD_GET_INTERFACE, 0, CIB_NETDEV, handle_interface_info);