1 /*
2 * Common hostapd/wpa_supplicant ctrl iface code.
3 * Copyright (c) 2002-2013, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2015, Qualcomm Atheros, Inc.
5 *
6 * This software may be distributed under the terms of the BSD license.
7 * See README for more details.
8 */
9
10 #include "utils/includes.h"
11 #include <netdb.h>
12 #include <sys/un.h>
13
14 #include "utils/common.h"
15 #include "ctrl_iface_common.h"
16
sockaddr_compare(struct sockaddr_storage * a,socklen_t a_len,struct sockaddr_storage * b,socklen_t b_len)17 static int sockaddr_compare(struct sockaddr_storage *a, socklen_t a_len,
18 struct sockaddr_storage *b, socklen_t b_len)
19 {
20 if (a->ss_family != b->ss_family)
21 return 1;
22
23 switch (a->ss_family) {
24 #ifdef CONFIG_CTRL_IFACE_UDP
25 case AF_INET:
26 {
27 struct sockaddr_in *in_a, *in_b;
28
29 in_a = (struct sockaddr_in *) a;
30 in_b = (struct sockaddr_in *) b;
31
32 if (in_a->sin_port != in_b->sin_port)
33 return 1;
34 if (in_a->sin_addr.s_addr != in_b->sin_addr.s_addr)
35 return 1;
36 break;
37 }
38 case AF_INET6:
39 {
40 struct sockaddr_in6 *in6_a, *in6_b;
41
42 in6_a = (struct sockaddr_in6 *) a;
43 in6_b = (struct sockaddr_in6 *) b;
44
45 if (in6_a->sin6_port != in6_b->sin6_port)
46 return 1;
47 if (os_memcmp(&in6_a->sin6_addr, &in6_b->sin6_addr,
48 sizeof(in6_a->sin6_addr)) != 0)
49 return 1;
50 break;
51 }
52 #endif /* CONFIG_CTRL_IFACE_UDP */
53 #ifdef CONFIG_CTRL_IFACE_UNIX
54 case AF_UNIX:
55 {
56 struct sockaddr_un *u_a, *u_b;
57
58 u_a = (struct sockaddr_un *) a;
59 u_b = (struct sockaddr_un *) b;
60
61 if (a_len != b_len ||
62 os_memcmp(u_a->sun_path, u_b->sun_path,
63 a_len - offsetof(struct sockaddr_un, sun_path))
64 != 0)
65 return 1;
66 break;
67 }
68 #endif /* CONFIG_CTRL_IFACE_UNIX */
69 default:
70 return 1;
71 }
72
73 return 0;
74 }
75
76
sockaddr_print(int level,const char * msg,struct sockaddr_storage * sock,socklen_t socklen)77 void sockaddr_print(int level, const char *msg, struct sockaddr_storage *sock,
78 socklen_t socklen)
79 {
80 switch (sock->ss_family) {
81 #ifdef CONFIG_CTRL_IFACE_UDP
82 case AF_INET:
83 case AF_INET6:
84 {
85 char host[NI_MAXHOST] = { 0 };
86 char service[NI_MAXSERV] = { 0 };
87
88 getnameinfo((struct sockaddr *) sock, socklen,
89 host, sizeof(host),
90 service, sizeof(service),
91 NI_NUMERICHOST);
92
93 wpa_printf(level, "%s %s:%s", msg, host, service);
94 break;
95 }
96 #endif /* CONFIG_CTRL_IFACE_UDP */
97 #ifdef CONFIG_CTRL_IFACE_UNIX
98 case AF_UNIX:
99 {
100 char addr_txt[200];
101
102 printf_encode(addr_txt, sizeof(addr_txt),
103 (u8 *) ((struct sockaddr_un *) sock)->sun_path,
104 socklen - offsetof(struct sockaddr_un, sun_path));
105 wpa_printf(level, "%s %s", msg, addr_txt);
106 break;
107 }
108 #endif /* CONFIG_CTRL_IFACE_UNIX */
109 default:
110 wpa_printf(level, "%s", msg);
111 break;
112 }
113 }
114
115
ctrl_set_events(struct wpa_ctrl_dst * dst,const char * input)116 static int ctrl_set_events(struct wpa_ctrl_dst *dst, const char *input)
117 {
118 const char *value;
119 int val;
120
121 if (!input)
122 return 0;
123
124 value = os_strchr(input, '=');
125 if (!value)
126 return -1;
127 value++;
128 val = atoi(value);
129 if (val < 0 || val > 1)
130 return -1;
131
132 if (str_starts(input, "probe_rx_events=")) {
133 if (val)
134 dst->events |= WPA_EVENT_RX_PROBE_REQUEST;
135 else
136 dst->events &= ~WPA_EVENT_RX_PROBE_REQUEST;
137 }
138
139 return 0;
140 }
141
142
ctrl_iface_attach(struct dl_list * ctrl_dst,struct sockaddr_storage * from,socklen_t fromlen,const char * input)143 int ctrl_iface_attach(struct dl_list *ctrl_dst, struct sockaddr_storage *from,
144 socklen_t fromlen, const char *input)
145 {
146 struct wpa_ctrl_dst *dst;
147
148 /* Update event registration if already attached */
149 dl_list_for_each(dst, ctrl_dst, struct wpa_ctrl_dst, list) {
150 if (!sockaddr_compare(from, fromlen,
151 &dst->addr, dst->addrlen))
152 return ctrl_set_events(dst, input);
153 }
154
155 /* New attachment */
156 dst = os_zalloc(sizeof(*dst));
157 if (dst == NULL)
158 return -1;
159 os_memcpy(&dst->addr, from, fromlen);
160 dst->addrlen = fromlen;
161 dst->debug_level = MSG_INFO;
162 ctrl_set_events(dst, input);
163 dl_list_add(ctrl_dst, &dst->list);
164
165 sockaddr_print(MSG_DEBUG, "CTRL_IFACE monitor attached", from, fromlen);
166 return 0;
167 }
168
169
ctrl_iface_detach(struct dl_list * ctrl_dst,struct sockaddr_storage * from,socklen_t fromlen)170 int ctrl_iface_detach(struct dl_list *ctrl_dst, struct sockaddr_storage *from,
171 socklen_t fromlen)
172 {
173 struct wpa_ctrl_dst *dst;
174
175 dl_list_for_each(dst, ctrl_dst, struct wpa_ctrl_dst, list) {
176 if (!sockaddr_compare(from, fromlen,
177 &dst->addr, dst->addrlen)) {
178 sockaddr_print(MSG_DEBUG, "CTRL_IFACE monitor detached",
179 from, fromlen);
180 dl_list_del(&dst->list);
181 os_free(dst);
182 return 0;
183 }
184 }
185
186 return -1;
187 }
188
189
ctrl_iface_level(struct dl_list * ctrl_dst,struct sockaddr_storage * from,socklen_t fromlen,const char * level)190 int ctrl_iface_level(struct dl_list *ctrl_dst, struct sockaddr_storage *from,
191 socklen_t fromlen, const char *level)
192 {
193 struct wpa_ctrl_dst *dst;
194
195 wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level);
196
197 dl_list_for_each(dst, ctrl_dst, struct wpa_ctrl_dst, list) {
198 if (!sockaddr_compare(from, fromlen,
199 &dst->addr, dst->addrlen)) {
200 sockaddr_print(MSG_DEBUG,
201 "CTRL_IFACE changed monitor level",
202 from, fromlen);
203 dst->debug_level = atoi(level);
204 return 0;
205 }
206 }
207
208 return -1;
209 }
210