components/wifi.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
/* See LICENSE file for copyright and license details. */
#include <ifaddrs.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <unistd.h>
#include "../util.h"
#if defined(__linux__)
#include <limits.h>
#include <linux/wireless.h>
const char *
wifi_perc(const char *interface)
{
int i, cur;
int total = 70; /* the max of /proc/net/wireless */
char *p, *datastart;
char path[PATH_MAX];
char status[5];
FILE *fp;
if (esnprintf(path, sizeof(path),
"/sys/class/net/%s/operstate",
interface) < 0) {
return NULL;
}
if (!(fp = fopen(path, "r"))) {
warn("fopen '%s':", path);
return NULL;
}
p = fgets(status, 5, fp);
fclose(fp);
if(!p || strcmp(status, "up\n") != 0) {
return NULL;
}
if (!(fp = fopen("/proc/net/wireless", "r"))) {
warn("fopen '/proc/net/wireless':");
return NULL;
}
for (i = 0; i < 3; i++) {
if (!(p = fgets(buf, sizeof(buf) - 1, fp)))
break;
}
fclose(fp);
if (i < 2 || !p) {
return NULL;
}
if (!(datastart = strstr(buf, interface))) {
return NULL;
}
datastart = (datastart+(strlen(interface)+1));
sscanf(datastart + 1, " %*d %d %*d %*d\t\t %*d\t "
"%*d\t\t%*d\t\t %*d\t %*d\t\t %*d", &cur);
return bprintf("%d", (int)((float)cur / total * 100));
}
const char *
wifi_essid(const char *interface)
{
static char id[IW_ESSID_MAX_SIZE+1];
int sockfd;
struct iwreq wreq;
memset(&wreq, 0, sizeof(struct iwreq));
wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
if (esnprintf(wreq.ifr_name, sizeof(wreq.ifr_name),
"%s", interface) < 0) {
return NULL;
}
if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
warn("socket 'AF_INET':");
return NULL;
}
wreq.u.essid.pointer = id;
if (ioctl(sockfd,SIOCGIWESSID, &wreq) < 0) {
warn("ioctl 'SIOCGIWESSID':");
close(sockfd);
return NULL;
}
close(sockfd);
if (!strcmp(id, "")) {
return NULL;
}
return id;
}
#elif defined(__OpenBSD__)
#include <net/if.h>
#include <net/if_media.h>
#include <net80211/ieee80211.h>
#include <sys/select.h> /* before <sys/ieee80211_ioctl.h> for NBBY */
#include <net80211/ieee80211_ioctl.h>
#include <stdlib.h>
#include <sys/types.h>
static int
load_ieee80211_nodereq(const char *interface, struct ieee80211_nodereq *nr)
{
struct ieee80211_bssid bssid;
int sockfd;
uint8_t zero_bssid[IEEE80211_ADDR_LEN];
memset(&bssid, 0, sizeof(bssid));
memset(nr, 0, sizeof(struct ieee80211_nodereq));
if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
warn("socket 'AF_INET':");
return 0;
}
strlcpy(bssid.i_name, interface, sizeof(bssid.i_name));
if ((ioctl(sockfd, SIOCG80211BSSID, &bssid)) < 0) {
warn("ioctl 'SIOCG80211BSSID':");
close(sockfd);
return 0;
}
memset(&zero_bssid, 0, sizeof(zero_bssid));
if (memcmp(bssid.i_bssid, zero_bssid,
IEEE80211_ADDR_LEN) == 0) {
close(sockfd);
return 0;
}
strlcpy(nr->nr_ifname, interface, sizeof(nr->nr_ifname));
memcpy(&nr->nr_macaddr, bssid.i_bssid, sizeof(nr->nr_macaddr));
if ((ioctl(sockfd, SIOCG80211NODE, nr)) < 0 && nr->nr_rssi) {
warn("ioctl 'SIOCG80211NODE':");
close(sockfd);
return 0;
}
return close(sockfd), 1;
}
const char *
wifi_perc(const char *interface)
{
struct ieee80211_nodereq nr;
int q;
if (load_ieee80211_nodereq(interface, &nr)) {
if (nr.nr_max_rssi) {
q = IEEE80211_NODEREQ_RSSI(&nr);
} else {
q = nr.nr_rssi >= -50 ? 100 : (nr.nr_rssi <= -100 ? 0 :
(2 * (nr.nr_rssi + 100)));
}
return bprintf("%d", q);
}
return NULL;
}
const char *
wifi_essid(const char *interface)
{
struct ieee80211_nodereq nr;
if (load_ieee80211_nodereq(interface, &nr)) {
return bprintf("%s", nr.nr_nwid);
}
return NULL;
}
#endif