xref: /netbsd-src/external/bsd/wpa/dist/src/drivers/linux_ioctl.c (revision ba65fde2d7fefa7d39838fa5fa855e62bd606b5e)
1 /*
2  * Linux ioctl helper functions for driver wrappers
3  * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation.
8  *
9  * Alternatively, this software may be distributed under the terms of BSD
10  * license.
11  *
12  * See README and COPYING for more details.
13  */
14 
15 #include "utils/includes.h"
16 #include <sys/ioctl.h>
17 #include <net/if.h>
18 #include <net/if_arp.h>
19 
20 #include "utils/common.h"
21 #include "linux_ioctl.h"
22 
23 
24 int linux_set_iface_flags(int sock, const char *ifname, int dev_up)
25 {
26 	struct ifreq ifr;
27 	int ret;
28 
29 	if (sock < 0)
30 		return -1;
31 
32 	os_memset(&ifr, 0, sizeof(ifr));
33 	os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
34 
35 	if (ioctl(sock, SIOCGIFFLAGS, &ifr) != 0) {
36 		ret = errno ? -errno : -999;
37 		wpa_printf(MSG_ERROR, "Could not read interface %s flags: %s",
38 			   ifname, strerror(errno));
39 		return ret;
40 	}
41 
42 	if (dev_up) {
43 		if (ifr.ifr_flags & IFF_UP)
44 			return 0;
45 		ifr.ifr_flags |= IFF_UP;
46 	} else {
47 		if (!(ifr.ifr_flags & IFF_UP))
48 			return 0;
49 		ifr.ifr_flags &= ~IFF_UP;
50 	}
51 
52 	if (ioctl(sock, SIOCSIFFLAGS, &ifr) != 0) {
53 		ret = errno ? -errno : -999;
54 		wpa_printf(MSG_ERROR, "Could not set interface %s flags: %s",
55 			   ifname, strerror(errno));
56 		return ret;
57 	}
58 
59 	return 0;
60 }
61 
62 
63 int linux_iface_up(int sock, const char *ifname)
64 {
65 	struct ifreq ifr;
66 	int ret;
67 
68 	if (sock < 0)
69 		return -1;
70 
71 	os_memset(&ifr, 0, sizeof(ifr));
72 	os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
73 
74 	if (ioctl(sock, SIOCGIFFLAGS, &ifr) != 0) {
75 		ret = errno ? -errno : -999;
76 		wpa_printf(MSG_ERROR, "Could not read interface %s flags: %s",
77 			   ifname, strerror(errno));
78 		return ret;
79 	}
80 
81 	return !!(ifr.ifr_flags & IFF_UP);
82 }
83 
84 
85 int linux_get_ifhwaddr(int sock, const char *ifname, u8 *addr)
86 {
87 	struct ifreq ifr;
88 
89 	os_memset(&ifr, 0, sizeof(ifr));
90 	os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
91 	if (ioctl(sock, SIOCGIFHWADDR, &ifr)) {
92 		wpa_printf(MSG_ERROR, "Could not get interface %s hwaddr: %s",
93 			   ifname, strerror(errno));
94 		return -1;
95 	}
96 
97 	if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
98 		wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
99 			   ifname, ifr.ifr_hwaddr.sa_family);
100 		return -1;
101 	}
102 	os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
103 
104 	return 0;
105 }
106 
107 
108 int linux_set_ifhwaddr(int sock, const char *ifname, const u8 *addr)
109 {
110 	struct ifreq ifr;
111 
112 	os_memset(&ifr, 0, sizeof(ifr));
113 	os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
114 	os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
115 	ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
116 
117 	if (ioctl(sock, SIOCSIFHWADDR, &ifr)) {
118 		wpa_printf(MSG_DEBUG, "Could not set interface %s hwaddr: %s",
119 			   ifname, strerror(errno));
120 		return -1;
121 	}
122 
123 	return 0;
124 }
125 
126 
127 #ifndef SIOCBRADDBR
128 #define SIOCBRADDBR 0x89a0
129 #endif
130 #ifndef SIOCBRDELBR
131 #define SIOCBRDELBR 0x89a1
132 #endif
133 #ifndef SIOCBRADDIF
134 #define SIOCBRADDIF 0x89a2
135 #endif
136 #ifndef SIOCBRDELIF
137 #define SIOCBRDELIF 0x89a3
138 #endif
139 
140 
141 int linux_br_add(int sock, const char *brname)
142 {
143 	if (ioctl(sock, SIOCBRADDBR, brname) < 0) {
144 		wpa_printf(MSG_DEBUG, "Could not add bridge %s: %s",
145 			   brname, strerror(errno));
146 		return -1;
147 	}
148 
149 	return 0;
150 }
151 
152 
153 int linux_br_del(int sock, const char *brname)
154 {
155 	if (ioctl(sock, SIOCBRDELBR, brname) < 0) {
156 		wpa_printf(MSG_DEBUG, "Could not remove bridge %s: %s",
157 			   brname, strerror(errno));
158 		return -1;
159 	}
160 
161 	return 0;
162 }
163 
164 
165 int linux_br_add_if(int sock, const char *brname, const char *ifname)
166 {
167 	struct ifreq ifr;
168 	int ifindex;
169 
170 	ifindex = if_nametoindex(ifname);
171 	if (ifindex == 0)
172 		return -1;
173 
174 	os_memset(&ifr, 0, sizeof(ifr));
175 	os_strlcpy(ifr.ifr_name, brname, IFNAMSIZ);
176 	ifr.ifr_ifindex = ifindex;
177 	if (ioctl(sock, SIOCBRADDIF, &ifr) < 0) {
178 		wpa_printf(MSG_DEBUG, "Could not add interface %s into bridge "
179 			   "%s: %s", ifname, brname, strerror(errno));
180 		return -1;
181 	}
182 
183 	return 0;
184 }
185 
186 
187 int linux_br_del_if(int sock, const char *brname, const char *ifname)
188 {
189 	struct ifreq ifr;
190 	int ifindex;
191 
192 	ifindex = if_nametoindex(ifname);
193 	if (ifindex == 0)
194 		return -1;
195 
196 	os_memset(&ifr, 0, sizeof(ifr));
197 	os_strlcpy(ifr.ifr_name, brname, IFNAMSIZ);
198 	ifr.ifr_ifindex = ifindex;
199 	if (ioctl(sock, SIOCBRDELIF, &ifr) < 0) {
200 		wpa_printf(MSG_DEBUG, "Could not remove interface %s from "
201 			   "bridge %s: %s", ifname, brname, strerror(errno));
202 		return -1;
203 	}
204 
205 	return 0;
206 }
207 
208 
209 int linux_br_get(char *brname, const char *ifname)
210 {
211 	char path[128], brlink[128], *pos;
212 	os_snprintf(path, sizeof(path), "/sys/class/net/%s/brport/bridge",
213 		    ifname);
214 	os_memset(brlink, 0, sizeof(brlink));
215 	if (readlink(path, brlink, sizeof(brlink) - 1) < 0)
216 		return -1;
217 	pos = os_strrchr(brlink, '/');
218 	if (pos == NULL)
219 		return -1;
220 	pos++;
221 	os_strlcpy(brname, pos, IFNAMSIZ);
222 	return 0;
223 }
224