1 /*
2 * Driver interaction with OpenBSD net80211 layer
3 * Copyright (c) 2013, Mark Kettenis
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10 #include <sys/ioctl.h>
11
12 #include <net/if.h>
13 #include <net80211/ieee80211.h>
14 #include <net80211/ieee80211_crypto.h>
15 #include <net80211/ieee80211_ioctl.h>
16
17 #include "common.h"
18 #include "driver.h"
19
20 struct openbsd_driver_data {
21 char ifname[IFNAMSIZ + 1];
22 void *ctx;
23
24 int sock; /* open socket for 802.11 ioctls */
25 };
26
27
28 static int
wpa_driver_openbsd_get_ssid(void * priv,u8 * ssid)29 wpa_driver_openbsd_get_ssid(void *priv, u8 *ssid)
30 {
31 struct openbsd_driver_data *drv = priv;
32 struct ieee80211_nwid nwid;
33 struct ifreq ifr;
34
35 os_memset(&ifr, 0, sizeof(ifr));
36 os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
37 ifr.ifr_data = (void *)&nwid;
38 if (ioctl(drv->sock, SIOCG80211NWID, &ifr) < 0 ||
39 nwid.i_len > IEEE80211_NWID_LEN)
40 return -1;
41
42 os_memcpy(ssid, nwid.i_nwid, nwid.i_len);
43 return nwid.i_len;
44 }
45
46 static int
wpa_driver_openbsd_get_bssid(void * priv,u8 * bssid)47 wpa_driver_openbsd_get_bssid(void *priv, u8 *bssid)
48 {
49 struct openbsd_driver_data *drv = priv;
50 struct ieee80211_bssid id;
51
52 os_strlcpy(id.i_name, drv->ifname, sizeof(id.i_name));
53 if (ioctl(drv->sock, SIOCG80211BSSID, &id) < 0)
54 return -1;
55
56 os_memcpy(bssid, id.i_bssid, IEEE80211_ADDR_LEN);
57 return 0;
58 }
59
60
61 static int
wpa_driver_openbsd_get_capa(void * priv,struct wpa_driver_capa * capa)62 wpa_driver_openbsd_get_capa(void *priv, struct wpa_driver_capa *capa)
63 {
64 os_memset(capa, 0, sizeof(*capa));
65 capa->flags = WPA_DRIVER_FLAGS_4WAY_HANDSHAKE_PSK |
66 WPA_DRIVER_FLAGS_4WAY_HANDSHAKE_8021X;
67 return 0;
68 }
69
70
71 static int
wpa_driver_openbsd_set_key(const char * ifname,void * priv,enum wpa_alg alg,const unsigned char * addr,int key_idx,int set_tx,const u8 * seq,size_t seq_len,const u8 * key,size_t key_len)72 wpa_driver_openbsd_set_key(const char *ifname, void *priv, enum wpa_alg alg,
73 const unsigned char *addr, int key_idx, int set_tx, const u8 *seq,
74 size_t seq_len, const u8 *key, size_t key_len)
75 {
76 struct openbsd_driver_data *drv = priv;
77 struct ieee80211_keyavail keyavail;
78
79 if (alg != WPA_ALG_PMK || key_len > IEEE80211_PMK_LEN)
80 return -1;
81
82 memset(&keyavail, 0, sizeof(keyavail));
83 os_strlcpy(keyavail.i_name, drv->ifname, sizeof(keyavail.i_name));
84 if (wpa_driver_openbsd_get_bssid(priv, keyavail.i_macaddr) < 0)
85 return -1;
86 memcpy(keyavail.i_key, key, key_len);
87
88 if (ioctl(drv->sock, SIOCS80211KEYAVAIL, &keyavail) < 0)
89 return -1;
90
91 return 0;
92 }
93
94 static void *
wpa_driver_openbsd_init(void * ctx,const char * ifname)95 wpa_driver_openbsd_init(void *ctx, const char *ifname)
96 {
97 struct openbsd_driver_data *drv;
98
99 drv = os_zalloc(sizeof(*drv));
100 if (drv == NULL)
101 return NULL;
102
103 drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
104 if (drv->sock < 0)
105 goto fail;
106
107 drv->ctx = ctx;
108 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
109
110 return drv;
111
112 fail:
113 os_free(drv);
114 return NULL;
115 }
116
117
118 static void
wpa_driver_openbsd_deinit(void * priv)119 wpa_driver_openbsd_deinit(void *priv)
120 {
121 struct openbsd_driver_data *drv = priv;
122
123 close(drv->sock);
124 os_free(drv);
125 }
126
127
128 const struct wpa_driver_ops wpa_driver_openbsd_ops = {
129 .name = "openbsd",
130 .desc = "OpenBSD 802.11 support",
131 .get_ssid = wpa_driver_openbsd_get_ssid,
132 .get_bssid = wpa_driver_openbsd_get_bssid,
133 .get_capa = wpa_driver_openbsd_get_capa,
134 .set_key = wpa_driver_openbsd_set_key,
135 .init = wpa_driver_openbsd_init,
136 .deinit = wpa_driver_openbsd_deinit,
137 };
138