Disconnect hostapd from building in base
[dragonfly.git] / contrib / hostapd / src / wps / wps_er_ssdp.c
CommitLineData
4781064b
JM
1/*
2 * Wi-Fi Protected Setup - External Registrar (SSDP)
3 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
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
11#include "common.h"
12#include "uuid.h"
13#include "eloop.h"
14#include "wps_i.h"
15#include "wps_upnp.h"
16#include "wps_upnp_i.h"
17#include "wps_er.h"
18
19
20static void wps_er_ssdp_rx(int sd, void *eloop_ctx, void *sock_ctx)
21{
22 struct wps_er *er = eloop_ctx;
23 struct sockaddr_in addr; /* client address */
24 socklen_t addr_len;
25 int nread;
26 char buf[MULTICAST_MAX_READ], *pos, *pos2, *start;
27 int wfa = 0, byebye = 0;
28 int max_age = -1;
29 char *location = NULL;
30 u8 uuid[WPS_UUID_LEN];
31
32 addr_len = sizeof(addr);
33 nread = recvfrom(sd, buf, sizeof(buf) - 1, 0,
34 (struct sockaddr *) &addr, &addr_len);
35 if (nread <= 0)
36 return;
37 buf[nread] = '\0';
38 if (er->filter_addr.s_addr &&
39 er->filter_addr.s_addr != addr.sin_addr.s_addr)
40 return;
41
42 wpa_printf(MSG_DEBUG, "WPS ER: Received SSDP from %s",
43 inet_ntoa(addr.sin_addr));
44 wpa_hexdump_ascii(MSG_MSGDUMP, "WPS ER: Received SSDP contents",
45 (u8 *) buf, nread);
46
47 if (sd == er->multicast_sd) {
48 /* Reply to M-SEARCH */
49 if (os_strncmp(buf, "HTTP/1.1 200 OK", 15) != 0)
50 return; /* unexpected response header */
51 } else {
52 /* Unsolicited message (likely NOTIFY or M-SEARCH) */
53 if (os_strncmp(buf, "NOTIFY ", 7) != 0)
54 return; /* only process notifications */
55 }
56
57 os_memset(uuid, 0, sizeof(uuid));
58
59 for (start = buf; start && *start; start = pos) {
60 pos = os_strchr(start, '\n');
61 if (pos) {
62 if (pos[-1] == '\r')
63 pos[-1] = '\0';
64 *pos++ = '\0';
65 }
66 if (os_strstr(start, "schemas-wifialliance-org:device:"
67 "WFADevice:1"))
68 wfa = 1;
69 if (os_strstr(start, "schemas-wifialliance-org:service:"
70 "WFAWLANConfig:1"))
71 wfa = 1;
72 if (os_strncasecmp(start, "LOCATION:", 9) == 0) {
73 start += 9;
74 while (*start == ' ')
75 start++;
76 location = start;
77 } else if (os_strncasecmp(start, "NTS:", 4) == 0) {
78 if (os_strstr(start, "ssdp:byebye"))
79 byebye = 1;
80 } else if (os_strncasecmp(start, "CACHE-CONTROL:", 14) == 0) {
81 start += 9;
82 while (*start == ' ')
83 start++;
84 pos2 = os_strstr(start, "max-age=");
85 if (pos2 == NULL)
86 continue;
87 pos2 += 8;
88 max_age = atoi(pos2);
89 } else if (os_strncasecmp(start, "USN:", 4) == 0) {
90 start += 4;
91 pos2 = os_strstr(start, "uuid:");
92 if (pos2) {
93 pos2 += 5;
94 while (*pos2 == ' ')
95 pos2++;
96 if (uuid_str2bin(pos2, uuid) < 0) {
97 wpa_printf(MSG_DEBUG, "WPS ER: "
98 "Invalid UUID in USN: %s",
99 pos2);
100 return;
101 }
102 }
103 }
104 }
105
106 if (!wfa)
107 return; /* Not WPS advertisement/reply */
108
109 if (byebye) {
110 wps_er_ap_cache_settings(er, &addr.sin_addr);
111 wps_er_ap_remove(er, &addr.sin_addr);
112 return;
113 }
114
115 if (!location)
116 return; /* Unknown location */
117
118 if (max_age < 1)
119 return; /* No max-age reported */
120
121 wpa_printf(MSG_DEBUG, "WPS ER: AP discovered: %s "
122 "(packet source: %s max-age: %d)",
123 location, inet_ntoa(addr.sin_addr), max_age);
124
125 wps_er_ap_add(er, uuid, &addr.sin_addr, location, max_age);
126}
127
128
129void wps_er_send_ssdp_msearch(struct wps_er *er)
130{
131 struct wpabuf *msg;
132 struct sockaddr_in dest;
133
134 msg = wpabuf_alloc(500);
135 if (msg == NULL)
136 return;
137
138 wpabuf_put_str(msg,
139 "M-SEARCH * HTTP/1.1\r\n"
140 "HOST: 239.255.255.250:1900\r\n"
141 "MAN: \"ssdp:discover\"\r\n"
142 "MX: 3\r\n"
143 "ST: urn:schemas-wifialliance-org:device:WFADevice:1"
144 "\r\n"
145 "\r\n");
146
147 os_memset(&dest, 0, sizeof(dest));
148 dest.sin_family = AF_INET;
149 dest.sin_addr.s_addr = inet_addr(UPNP_MULTICAST_ADDRESS);
150 dest.sin_port = htons(UPNP_MULTICAST_PORT);
151
152 if (sendto(er->multicast_sd, wpabuf_head(msg), wpabuf_len(msg), 0,
153 (struct sockaddr *) &dest, sizeof(dest)) < 0)
154 wpa_printf(MSG_DEBUG, "WPS ER: M-SEARCH sendto failed: "
155 "%d (%s)", errno, strerror(errno));
156
157 wpabuf_free(msg);
158}
159
160
161int wps_er_ssdp_init(struct wps_er *er)
162{
163 if (add_ssdp_network(er->ifname)) {
164 wpa_printf(MSG_INFO, "WPS ER: Failed to add routing entry for "
165 "SSDP");
166 return -1;
167 }
168
169 er->multicast_sd = ssdp_open_multicast_sock(er->ip_addr,
170 er->forced_ifname ?
171 er->ifname : NULL);
172 if (er->multicast_sd < 0) {
173 wpa_printf(MSG_INFO, "WPS ER: Failed to open multicast socket "
174 "for SSDP");
175 return -1;
176 }
177
178 er->ssdp_sd = ssdp_listener_open();
179 if (er->ssdp_sd < 0) {
180 wpa_printf(MSG_INFO, "WPS ER: Failed to open SSDP listener "
181 "socket");
182 return -1;
183 }
184
185 if (eloop_register_sock(er->multicast_sd, EVENT_TYPE_READ,
186 wps_er_ssdp_rx, er, NULL) ||
187 eloop_register_sock(er->ssdp_sd, EVENT_TYPE_READ,
188 wps_er_ssdp_rx, er, NULL))
189 return -1;
190
191 wps_er_send_ssdp_msearch(er);
192
193 return 0;
194}
195
196
197void wps_er_ssdp_deinit(struct wps_er *er)
198{
199 if (er->multicast_sd >= 0) {
200 eloop_unregister_sock(er->multicast_sd, EVENT_TYPE_READ);
201 close(er->multicast_sd);
202 }
203 if (er->ssdp_sd >= 0) {
204 eloop_unregister_sock(er->ssdp_sd, EVENT_TYPE_READ);
205 close(er->ssdp_sd);
206 }
207}