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;
66 	return 0;
67 }
68 
69 
70 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)71 wpa_driver_openbsd_set_key(const char *ifname, void *priv, enum wpa_alg alg,
72 	    const unsigned char *addr, int key_idx, int set_tx, const u8 *seq,
73 	    size_t seq_len, const u8 *key, size_t key_len)
74 {
75 	struct openbsd_driver_data *drv = priv;
76 	struct ieee80211_keyavail keyavail;
77 
78 	if (alg != WPA_ALG_PMK || key_len > IEEE80211_PMK_LEN)
79 		return -1;
80 
81 	memset(&keyavail, 0, sizeof(keyavail));
82 	os_strlcpy(keyavail.i_name, drv->ifname, sizeof(keyavail.i_name));
83 	if (wpa_driver_openbsd_get_bssid(priv, keyavail.i_macaddr) < 0)
84 		return -1;
85 	memcpy(keyavail.i_key, key, key_len);
86 
87 	if (ioctl(drv->sock, SIOCS80211KEYAVAIL, &keyavail) < 0)
88 		return -1;
89 
90 	return 0;
91 }
92 
93 static void *
wpa_driver_openbsd_init(void * ctx,const char * ifname)94 wpa_driver_openbsd_init(void *ctx, const char *ifname)
95 {
96 	struct openbsd_driver_data *drv;
97 
98 	drv = os_zalloc(sizeof(*drv));
99 	if (drv == NULL)
100 		return NULL;
101 
102 	drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
103 	if (drv->sock < 0)
104 		goto fail;
105 
106 	drv->ctx = ctx;
107 	os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
108 
109 	return drv;
110 
111 fail:
112 	os_free(drv);
113 	return NULL;
114 }
115 
116 
117 static void
wpa_driver_openbsd_deinit(void * priv)118 wpa_driver_openbsd_deinit(void *priv)
119 {
120 	struct openbsd_driver_data *drv = priv;
121 
122 	close(drv->sock);
123 	os_free(drv);
124 }
125 
126 
127 const struct wpa_driver_ops wpa_driver_openbsd_ops = {
128 	.name = "openbsd",
129 	.desc = "OpenBSD 802.11 support",
130 	.get_ssid = wpa_driver_openbsd_get_ssid,
131 	.get_bssid = wpa_driver_openbsd_get_bssid,
132 	.get_capa = wpa_driver_openbsd_get_capa,
133 	.set_key = wpa_driver_openbsd_set_key,
134 	.init = wpa_driver_openbsd_init,
135 	.deinit = wpa_driver_openbsd_deinit,
136 };
137